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Samuel Morris aece27a2f0 ata: ahci_platform: allow disabling of hotplug to save power 
A number of resources remain powered to support hotplug. On platforms
I've worked with, allowing the ahci_platform to suspend saves about
150mW. This patch enables rpm and allows the device to be auto-suspended
through sysfs.

Signed-off-by: Samuel Morris <samorris@lexmark.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2018-06-18 10:58:55 -07:00
Samuel Morris 332c42a9ff ata: ahci: rpm_put port on port_stop to match rpm_get in port_start 
This change balances out the final ahci_port_resume in port_start to
ensure reference counts are correct after port stop.

Signed-off-by: Samuel Morris <samorris@lexmark.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2018-06-18 10:58:42 -07:00
Kees Cook a86854d0c5 treewide: devm_kzalloc() -> devm_kcalloc() 
The devm_kzalloc() function has a 2-factor argument form, devm_kcalloc().
This patch replaces cases of:

        devm_kzalloc(handle, a * b, gfp)

with:
        devm_kcalloc(handle, a * b, gfp)

as well as handling cases of:

        devm_kzalloc(handle, a * b * c, gfp)

with:

        devm_kzalloc(handle, array3_size(a, b, c), gfp)

as it's slightly less ugly than:

        devm_kcalloc(handle, array_size(a, b), c, gfp)

This does, however, attempt to ignore constant size factors like:

        devm_kzalloc(handle, 4 * 1024, gfp)

though any constants defined via macros get caught up in the conversion.

Any factors with a sizeof() of "unsigned char", "char", and "u8" were
dropped, since they're redundant.

Some manual whitespace fixes were needed in this patch, as Coccinelle
really liked to write "=devm_kcalloc..." instead of "= devm_kcalloc...".

The Coccinelle script used for this was:

// Fix redundant parens around sizeof().
@@
expression HANDLE;
type TYPE;
expression THING, E;
@@

(
  devm_kzalloc(HANDLE,
-	(sizeof(TYPE)) * E
+	sizeof(TYPE) * E
  , ...)
|
  devm_kzalloc(HANDLE,
-	(sizeof(THING)) * E
+	sizeof(THING) * E
  , ...)
)

// Drop single-byte sizes and redundant parens.
@@
expression HANDLE;
expression COUNT;
typedef u8;
typedef __u8;
@@

(
  devm_kzalloc(HANDLE,
-	sizeof(u8) * (COUNT)
+	COUNT
  , ...)
|
  devm_kzalloc(HANDLE,
-	sizeof(__u8) * (COUNT)
+	COUNT
  , ...)
|
  devm_kzalloc(HANDLE,
-	sizeof(char) * (COUNT)
+	COUNT
  , ...)
|
  devm_kzalloc(HANDLE,
-	sizeof(unsigned char) * (COUNT)
+	COUNT
  , ...)
|
  devm_kzalloc(HANDLE,
-	sizeof(u8) * COUNT
+	COUNT
  , ...)
|
  devm_kzalloc(HANDLE,
-	sizeof(__u8) * COUNT
+	COUNT
  , ...)
|
  devm_kzalloc(HANDLE,
-	sizeof(char) * COUNT
+	COUNT
  , ...)
|
  devm_kzalloc(HANDLE,
-	sizeof(unsigned char) * COUNT
+	COUNT
  , ...)
)

// 2-factor product with sizeof(type/expression) and identifier or constant.
@@
expression HANDLE;
type TYPE;
expression THING;
identifier COUNT_ID;
constant COUNT_CONST;
@@

(
- devm_kzalloc
+ devm_kcalloc
  (HANDLE,
-	sizeof(TYPE) * (COUNT_ID)
+	COUNT_ID, sizeof(TYPE)
  , ...)
|
- devm_kzalloc
+ devm_kcalloc
  (HANDLE,
-	sizeof(TYPE) * COUNT_ID
+	COUNT_ID, sizeof(TYPE)
  , ...)
|
- devm_kzalloc
+ devm_kcalloc
  (HANDLE,
-	sizeof(TYPE) * (COUNT_CONST)
+	COUNT_CONST, sizeof(TYPE)
  , ...)
|
- devm_kzalloc
+ devm_kcalloc
  (HANDLE,
-	sizeof(TYPE) * COUNT_CONST
+	COUNT_CONST, sizeof(TYPE)
  , ...)
|
- devm_kzalloc
+ devm_kcalloc
  (HANDLE,
-	sizeof(THING) * (COUNT_ID)
+	COUNT_ID, sizeof(THING)
  , ...)
|
- devm_kzalloc
+ devm_kcalloc
  (HANDLE,
-	sizeof(THING) * COUNT_ID
+	COUNT_ID, sizeof(THING)
  , ...)
|
- devm_kzalloc
+ devm_kcalloc
  (HANDLE,
-	sizeof(THING) * (COUNT_CONST)
+	COUNT_CONST, sizeof(THING)
  , ...)
|
- devm_kzalloc
+ devm_kcalloc
  (HANDLE,
-	sizeof(THING) * COUNT_CONST
+	COUNT_CONST, sizeof(THING)
  , ...)
)

// 2-factor product, only identifiers.
@@
expression HANDLE;
identifier SIZE, COUNT;
@@

- devm_kzalloc
+ devm_kcalloc
  (HANDLE,
-	SIZE * COUNT
+	COUNT, SIZE
  , ...)

// 3-factor product with 1 sizeof(type) or sizeof(expression), with
// redundant parens removed.
@@
expression HANDLE;
expression THING;
identifier STRIDE, COUNT;
type TYPE;
@@

(
  devm_kzalloc(HANDLE,
-	sizeof(TYPE) * (COUNT) * (STRIDE)
+	array3_size(COUNT, STRIDE, sizeof(TYPE))
  , ...)
|
  devm_kzalloc(HANDLE,
-	sizeof(TYPE) * (COUNT) * STRIDE
+	array3_size(COUNT, STRIDE, sizeof(TYPE))
  , ...)
|
  devm_kzalloc(HANDLE,
-	sizeof(TYPE) * COUNT * (STRIDE)
+	array3_size(COUNT, STRIDE, sizeof(TYPE))
  , ...)
|
  devm_kzalloc(HANDLE,
-	sizeof(TYPE) * COUNT * STRIDE
+	array3_size(COUNT, STRIDE, sizeof(TYPE))
  , ...)
|
  devm_kzalloc(HANDLE,
-	sizeof(THING) * (COUNT) * (STRIDE)
+	array3_size(COUNT, STRIDE, sizeof(THING))
  , ...)
|
  devm_kzalloc(HANDLE,
-	sizeof(THING) * (COUNT) * STRIDE
+	array3_size(COUNT, STRIDE, sizeof(THING))
  , ...)
|
  devm_kzalloc(HANDLE,
-	sizeof(THING) * COUNT * (STRIDE)
+	array3_size(COUNT, STRIDE, sizeof(THING))
  , ...)
|
  devm_kzalloc(HANDLE,
-	sizeof(THING) * COUNT * STRIDE
+	array3_size(COUNT, STRIDE, sizeof(THING))
  , ...)
)

// 3-factor product with 2 sizeof(variable), with redundant parens removed.
@@
expression HANDLE;
expression THING1, THING2;
identifier COUNT;
type TYPE1, TYPE2;
@@

(
  devm_kzalloc(HANDLE,
-	sizeof(TYPE1) * sizeof(TYPE2) * COUNT
+	array3_size(COUNT, sizeof(TYPE1), sizeof(TYPE2))
  , ...)
|
  devm_kzalloc(HANDLE,
-	sizeof(TYPE1) * sizeof(THING2) * (COUNT)
+	array3_size(COUNT, sizeof(TYPE1), sizeof(TYPE2))
  , ...)
|
  devm_kzalloc(HANDLE,
-	sizeof(THING1) * sizeof(THING2) * COUNT
+	array3_size(COUNT, sizeof(THING1), sizeof(THING2))
  , ...)
|
  devm_kzalloc(HANDLE,
-	sizeof(THING1) * sizeof(THING2) * (COUNT)
+	array3_size(COUNT, sizeof(THING1), sizeof(THING2))
  , ...)
|
  devm_kzalloc(HANDLE,
-	sizeof(TYPE1) * sizeof(THING2) * COUNT
+	array3_size(COUNT, sizeof(TYPE1), sizeof(THING2))
  , ...)
|
  devm_kzalloc(HANDLE,
-	sizeof(TYPE1) * sizeof(THING2) * (COUNT)
+	array3_size(COUNT, sizeof(TYPE1), sizeof(THING2))
  , ...)
)

// 3-factor product, only identifiers, with redundant parens removed.
@@
expression HANDLE;
identifier STRIDE, SIZE, COUNT;
@@

(
  devm_kzalloc(HANDLE,
-	(COUNT) * STRIDE * SIZE
+	array3_size(COUNT, STRIDE, SIZE)
  , ...)
|
  devm_kzalloc(HANDLE,
-	COUNT * (STRIDE) * SIZE
+	array3_size(COUNT, STRIDE, SIZE)
  , ...)
|
  devm_kzalloc(HANDLE,
-	COUNT * STRIDE * (SIZE)
+	array3_size(COUNT, STRIDE, SIZE)
  , ...)
|
  devm_kzalloc(HANDLE,
-	(COUNT) * (STRIDE) * SIZE
+	array3_size(COUNT, STRIDE, SIZE)
  , ...)
|
  devm_kzalloc(HANDLE,
-	COUNT * (STRIDE) * (SIZE)
+	array3_size(COUNT, STRIDE, SIZE)
  , ...)
|
  devm_kzalloc(HANDLE,
-	(COUNT) * STRIDE * (SIZE)
+	array3_size(COUNT, STRIDE, SIZE)
  , ...)
|
  devm_kzalloc(HANDLE,
-	(COUNT) * (STRIDE) * (SIZE)
+	array3_size(COUNT, STRIDE, SIZE)
  , ...)
|
  devm_kzalloc(HANDLE,
-	COUNT * STRIDE * SIZE
+	array3_size(COUNT, STRIDE, SIZE)
  , ...)
)

// Any remaining multi-factor products, first at least 3-factor products,
// when they're not all constants...
@@
expression HANDLE;
expression E1, E2, E3;
constant C1, C2, C3;
@@

(
  devm_kzalloc(HANDLE, C1 * C2 * C3, ...)
|
  devm_kzalloc(HANDLE,
-	(E1) * E2 * E3
+	array3_size(E1, E2, E3)
  , ...)
|
  devm_kzalloc(HANDLE,
-	(E1) * (E2) * E3
+	array3_size(E1, E2, E3)
  , ...)
|
  devm_kzalloc(HANDLE,
-	(E1) * (E2) * (E3)
+	array3_size(E1, E2, E3)
  , ...)
|
  devm_kzalloc(HANDLE,
-	E1 * E2 * E3
+	array3_size(E1, E2, E3)
  , ...)
)

// And then all remaining 2 factors products when they're not all constants,
// keeping sizeof() as the second factor argument.
@@
expression HANDLE;
expression THING, E1, E2;
type TYPE;
constant C1, C2, C3;
@@

(
  devm_kzalloc(HANDLE, sizeof(THING) * C2, ...)
|
  devm_kzalloc(HANDLE, sizeof(TYPE) * C2, ...)
|
  devm_kzalloc(HANDLE, C1 * C2 * C3, ...)
|
  devm_kzalloc(HANDLE, C1 * C2, ...)
|
- devm_kzalloc
+ devm_kcalloc
  (HANDLE,
-	sizeof(TYPE) * (E2)
+	E2, sizeof(TYPE)
  , ...)
|
- devm_kzalloc
+ devm_kcalloc
  (HANDLE,
-	sizeof(TYPE) * E2
+	E2, sizeof(TYPE)
  , ...)
|
- devm_kzalloc
+ devm_kcalloc
  (HANDLE,
-	sizeof(THING) * (E2)
+	E2, sizeof(THING)
  , ...)
|
- devm_kzalloc
+ devm_kcalloc
  (HANDLE,
-	sizeof(THING) * E2
+	E2, sizeof(THING)
  , ...)
|
- devm_kzalloc
+ devm_kcalloc
  (HANDLE,
-	(E1) * E2
+	E1, E2
  , ...)
|
- devm_kzalloc
+ devm_kcalloc
  (HANDLE,
-	(E1) * (E2)
+	E1, E2
  , ...)
|
- devm_kzalloc
+ devm_kcalloc
  (HANDLE,
-	E1 * E2
+	E1, E2
  , ...)
)

Signed-off-by: Kees Cook <keescook@chromium.org>
 2018-06-12 16:19:22 -07:00
Kees Cook 6396bb2215 treewide: kzalloc() -> kcalloc() 
The kzalloc() function has a 2-factor argument form, kcalloc(). This
patch replaces cases of:

        kzalloc(a * b, gfp)

with:
        kcalloc(a * b, gfp)

as well as handling cases of:

        kzalloc(a * b * c, gfp)

with:

        kzalloc(array3_size(a, b, c), gfp)

as it's slightly less ugly than:

        kzalloc_array(array_size(a, b), c, gfp)

This does, however, attempt to ignore constant size factors like:

        kzalloc(4 * 1024, gfp)

though any constants defined via macros get caught up in the conversion.

Any factors with a sizeof() of "unsigned char", "char", and "u8" were
dropped, since they're redundant.

The Coccinelle script used for this was:

// Fix redundant parens around sizeof().
@@
type TYPE;
expression THING, E;
@@

(
  kzalloc(
-	(sizeof(TYPE)) * E
+	sizeof(TYPE) * E
  , ...)
|
  kzalloc(
-	(sizeof(THING)) * E
+	sizeof(THING) * E
  , ...)
)

// Drop single-byte sizes and redundant parens.
@@
expression COUNT;
typedef u8;
typedef __u8;
@@

(
  kzalloc(
-	sizeof(u8) * (COUNT)
+	COUNT
  , ...)
|
  kzalloc(
-	sizeof(__u8) * (COUNT)
+	COUNT
  , ...)
|
  kzalloc(
-	sizeof(char) * (COUNT)
+	COUNT
  , ...)
|
  kzalloc(
-	sizeof(unsigned char) * (COUNT)
+	COUNT
  , ...)
|
  kzalloc(
-	sizeof(u8) * COUNT
+	COUNT
  , ...)
|
  kzalloc(
-	sizeof(__u8) * COUNT
+	COUNT
  , ...)
|
  kzalloc(
-	sizeof(char) * COUNT
+	COUNT
  , ...)
|
  kzalloc(
-	sizeof(unsigned char) * COUNT
+	COUNT
  , ...)
)

// 2-factor product with sizeof(type/expression) and identifier or constant.
@@
type TYPE;
expression THING;
identifier COUNT_ID;
constant COUNT_CONST;
@@

(
- kzalloc
+ kcalloc
  (
-	sizeof(TYPE) * (COUNT_ID)
+	COUNT_ID, sizeof(TYPE)
  , ...)
|
- kzalloc
+ kcalloc
  (
-	sizeof(TYPE) * COUNT_ID
+	COUNT_ID, sizeof(TYPE)
  , ...)
|
- kzalloc
+ kcalloc
  (
-	sizeof(TYPE) * (COUNT_CONST)
+	COUNT_CONST, sizeof(TYPE)
  , ...)
|
- kzalloc
+ kcalloc
  (
-	sizeof(TYPE) * COUNT_CONST
+	COUNT_CONST, sizeof(TYPE)
  , ...)
|
- kzalloc
+ kcalloc
  (
-	sizeof(THING) * (COUNT_ID)
+	COUNT_ID, sizeof(THING)
  , ...)
|
- kzalloc
+ kcalloc
  (
-	sizeof(THING) * COUNT_ID
+	COUNT_ID, sizeof(THING)
  , ...)
|
- kzalloc
+ kcalloc
  (
-	sizeof(THING) * (COUNT_CONST)
+	COUNT_CONST, sizeof(THING)
  , ...)
|
- kzalloc
+ kcalloc
  (
-	sizeof(THING) * COUNT_CONST
+	COUNT_CONST, sizeof(THING)
  , ...)
)

// 2-factor product, only identifiers.
@@
identifier SIZE, COUNT;
@@

- kzalloc
+ kcalloc
  (
-	SIZE * COUNT
+	COUNT, SIZE
  , ...)

// 3-factor product with 1 sizeof(type) or sizeof(expression), with
// redundant parens removed.
@@
expression THING;
identifier STRIDE, COUNT;
type TYPE;
@@

(
  kzalloc(
-	sizeof(TYPE) * (COUNT) * (STRIDE)
+	array3_size(COUNT, STRIDE, sizeof(TYPE))
  , ...)
|
  kzalloc(
-	sizeof(TYPE) * (COUNT) * STRIDE
+	array3_size(COUNT, STRIDE, sizeof(TYPE))
  , ...)
|
  kzalloc(
-	sizeof(TYPE) * COUNT * (STRIDE)
+	array3_size(COUNT, STRIDE, sizeof(TYPE))
  , ...)
|
  kzalloc(
-	sizeof(TYPE) * COUNT * STRIDE
+	array3_size(COUNT, STRIDE, sizeof(TYPE))
  , ...)
|
  kzalloc(
-	sizeof(THING) * (COUNT) * (STRIDE)
+	array3_size(COUNT, STRIDE, sizeof(THING))
  , ...)
|
  kzalloc(
-	sizeof(THING) * (COUNT) * STRIDE
+	array3_size(COUNT, STRIDE, sizeof(THING))
  , ...)
|
  kzalloc(
-	sizeof(THING) * COUNT * (STRIDE)
+	array3_size(COUNT, STRIDE, sizeof(THING))
  , ...)
|
  kzalloc(
-	sizeof(THING) * COUNT * STRIDE
+	array3_size(COUNT, STRIDE, sizeof(THING))
  , ...)
)

// 3-factor product with 2 sizeof(variable), with redundant parens removed.
@@
expression THING1, THING2;
identifier COUNT;
type TYPE1, TYPE2;
@@

(
  kzalloc(
-	sizeof(TYPE1) * sizeof(TYPE2) * COUNT
+	array3_size(COUNT, sizeof(TYPE1), sizeof(TYPE2))
  , ...)
|
  kzalloc(
-	sizeof(TYPE1) * sizeof(THING2) * (COUNT)
+	array3_size(COUNT, sizeof(TYPE1), sizeof(TYPE2))
  , ...)
|
  kzalloc(
-	sizeof(THING1) * sizeof(THING2) * COUNT
+	array3_size(COUNT, sizeof(THING1), sizeof(THING2))
  , ...)
|
  kzalloc(
-	sizeof(THING1) * sizeof(THING2) * (COUNT)
+	array3_size(COUNT, sizeof(THING1), sizeof(THING2))
  , ...)
|
  kzalloc(
-	sizeof(TYPE1) * sizeof(THING2) * COUNT
+	array3_size(COUNT, sizeof(TYPE1), sizeof(THING2))
  , ...)
|
  kzalloc(
-	sizeof(TYPE1) * sizeof(THING2) * (COUNT)
+	array3_size(COUNT, sizeof(TYPE1), sizeof(THING2))
  , ...)
)

// 3-factor product, only identifiers, with redundant parens removed.
@@
identifier STRIDE, SIZE, COUNT;
@@

(
  kzalloc(
-	(COUNT) * STRIDE * SIZE
+	array3_size(COUNT, STRIDE, SIZE)
  , ...)
|
  kzalloc(
-	COUNT * (STRIDE) * SIZE
+	array3_size(COUNT, STRIDE, SIZE)
  , ...)
|
  kzalloc(
-	COUNT * STRIDE * (SIZE)
+	array3_size(COUNT, STRIDE, SIZE)
  , ...)
|
  kzalloc(
-	(COUNT) * (STRIDE) * SIZE
+	array3_size(COUNT, STRIDE, SIZE)
  , ...)
|
  kzalloc(
-	COUNT * (STRIDE) * (SIZE)
+	array3_size(COUNT, STRIDE, SIZE)
  , ...)
|
  kzalloc(
-	(COUNT) * STRIDE * (SIZE)
+	array3_size(COUNT, STRIDE, SIZE)
  , ...)
|
  kzalloc(
-	(COUNT) * (STRIDE) * (SIZE)
+	array3_size(COUNT, STRIDE, SIZE)
  , ...)
|
  kzalloc(
-	COUNT * STRIDE * SIZE
+	array3_size(COUNT, STRIDE, SIZE)
  , ...)
)

// Any remaining multi-factor products, first at least 3-factor products,
// when they're not all constants...
@@
expression E1, E2, E3;
constant C1, C2, C3;
@@

(
  kzalloc(C1 * C2 * C3, ...)
|
  kzalloc(
-	(E1) * E2 * E3
+	array3_size(E1, E2, E3)
  , ...)
|
  kzalloc(
-	(E1) * (E2) * E3
+	array3_size(E1, E2, E3)
  , ...)
|
  kzalloc(
-	(E1) * (E2) * (E3)
+	array3_size(E1, E2, E3)
  , ...)
|
  kzalloc(
-	E1 * E2 * E3
+	array3_size(E1, E2, E3)
  , ...)
)

// And then all remaining 2 factors products when they're not all constants,
// keeping sizeof() as the second factor argument.
@@
expression THING, E1, E2;
type TYPE;
constant C1, C2, C3;
@@

(
  kzalloc(sizeof(THING) * C2, ...)
|
  kzalloc(sizeof(TYPE) * C2, ...)
|
  kzalloc(C1 * C2 * C3, ...)
|
  kzalloc(C1 * C2, ...)
|
- kzalloc
+ kcalloc
  (
-	sizeof(TYPE) * (E2)
+	E2, sizeof(TYPE)
  , ...)
|
- kzalloc
+ kcalloc
  (
-	sizeof(TYPE) * E2
+	E2, sizeof(TYPE)
  , ...)
|
- kzalloc
+ kcalloc
  (
-	sizeof(THING) * (E2)
+	E2, sizeof(THING)
  , ...)
|
- kzalloc
+ kcalloc
  (
-	sizeof(THING) * E2
+	E2, sizeof(THING)
  , ...)
|
- kzalloc
+ kcalloc
  (
-	(E1) * E2
+	E1, E2
  , ...)
|
- kzalloc
+ kcalloc
  (
-	(E1) * (E2)
+	E1, E2
  , ...)
|
- kzalloc
+ kcalloc
  (
-	E1 * E2
+	E1, E2
  , ...)
)

Signed-off-by: Kees Cook <keescook@chromium.org>
 2018-06-12 16:19:22 -07:00
Linus Torvalds 5f85942c2e SCSI misc on 20180610 
This is mostly updates to the usual drivers: ufs, qedf, mpt3sas, lpfc,
 xfcp, hisi_sas, cxlflash, qla2xxx.  In the absence of Nic, we're also
 taking target updates which are mostly minor except for the tcmu
 refactor. The only real core change to worry about is the removal of
 high page bouncing (in sas, storvsc and iscsi).  This has been well
 tested and no problems have shown up so far.
 
 Signed-off-by: James E.J. Bottomley <jejb@linux.vnet.ibm.com>
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Merge tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi

Pull SCSI updates from James Bottomley:
 "This is mostly updates to the usual drivers: ufs, qedf, mpt3sas, lpfc,
  xfcp, hisi_sas, cxlflash, qla2xxx.

  In the absence of Nic, we're also taking target updates which are
  mostly minor except for the tcmu refactor.

  The only real core change to worry about is the removal of high page
  bouncing (in sas, storvsc and iscsi). This has been well tested and no
  problems have shown up so far"

* tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi: (268 commits)
  scsi: lpfc: update driver version to 12.0.0.4
  scsi: lpfc: Fix port initialization failure.
  scsi: lpfc: Fix 16gb hbas failing cq create.
  scsi: lpfc: Fix crash in blk_mq layer when executing modprobe -r lpfc
  scsi: lpfc: correct oversubscription of nvme io requests for an adapter
  scsi: lpfc: Fix MDS diagnostics failure (Rx < Tx)
  scsi: hisi_sas: Mark PHY as in reset for nexus reset
  scsi: hisi_sas: Fix return value when get_free_slot() failed
  scsi: hisi_sas: Terminate STP reject quickly for v2 hw
  scsi: hisi_sas: Add v2 hw force PHY function for internal ATA command
  scsi: hisi_sas: Include TMF elements in struct hisi_sas_slot
  scsi: hisi_sas: Try wait commands before before controller reset
  scsi: hisi_sas: Init disks after controller reset
  scsi: hisi_sas: Create a scsi_host_template per HW module
  scsi: hisi_sas: Reset disks when discovered
  scsi: hisi_sas: Add LED feature for v3 hw
  scsi: hisi_sas: Change common allocation mode of device id
  scsi: hisi_sas: change slot index allocation mode
  scsi: hisi_sas: Introduce hisi_sas_phy_set_linkrate()
  scsi: hisi_sas: fix a typo in hisi_sas_task_prep()
  ...
 2018-06-10 13:01:12 -07:00
Linus Torvalds 0bbddb8cbe Merge branch 'for-4.18' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/libata 
Pull libata updates from Tejun Heo:

 - libata has always been limiting the maximum queue depth to 31, with
   one entry set aside mostly for historical reasons. This didn't use to
   make much difference but Jens found out that modern hard drives can
   actually perform measurably better with the extra one queue depth.
   Jens updated libata core so that it can make use of full 32 queue
   depth

 - Damien updated command retry logic in error handling so that it
   doesn't unnecessarily retry when upper layer (SCSI) is gonna handle
   them

 - A couple misc changes

* 'for-4.18' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/libata:
  sata_fsl: use the right type for tag bitshift
  ahci: enable full queue depth of 32
  libata: don't clamp queue depth to ATA_MAX_QUEUE - 1
  libata: add extra internal command
  sata_nv: set host can_queue count appropriately
  libata: remove assumption that ATA_MAX_QUEUE - 1 is the max
  libata: use ata_tag_internal() consistently
  libata: bump ->qc_active to a 64-bit type
  libata: convert core and drivers to ->hw_tag usage
  libata: introduce notion of separate hardware tags
  libata: Fix command retry decision
  libata: Honor RQF_QUIET flag
  libata: Make ata_dev_set_mode() less verbose
  libata: Fix ata_err_string()
  libata: Fix comment typo in ata_eh_analyze_tf()
  sata_nv: don't use block layer bounce buffer
  ata: hpt37x: Convert to use match_string() helper
 2018-06-05 17:01:41 -07:00
Linus Torvalds 476d9ff653 Merge branch 'for-4.17-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/libata 
Pull libata fixes from Tejun Heo:
 "These two are fixes which missed v4.17.

  One is to remove an incorrect power management blacklist entry and the
  other to fix a cdb buffer overrun which has been there for a very long
  time"

* 'for-4.17-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/libata:
  libata: Drop SanDisk SD7UB3Q*G1001 NOLPM quirk
  libata: zpodd: small read overflow in eject_tray()
 2018-06-05 16:59:33 -07:00
Linus Torvalds f459c34538 for-4.18/block-20180603 
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Merge tag 'for-4.18/block-20180603' of git://git.kernel.dk/linux-block

Pull block updates from Jens Axboe:

 - clean up how we pass around gfp_t and
   blk_mq_req_flags_t (Christoph)

 - prepare us to defer scheduler attach (Christoph)

 - clean up drivers handling of bounce buffers (Christoph)

 - fix timeout handling corner cases (Christoph/Bart/Keith)

 - bcache fixes (Coly)

 - prep work for bcachefs and some block layer optimizations (Kent).

 - convert users of bio_sets to using embedded structs (Kent).

 - fixes for the BFQ io scheduler (Paolo/Davide/Filippo)

 - lightnvm fixes and improvements (Matias, with contributions from Hans
   and Javier)

 - adding discard throttling to blk-wbt (me)

 - sbitmap blk-mq-tag handling (me/Omar/Ming).

 - remove the sparc jsflash block driver, acked by DaveM.

 - Kyber scheduler improvement from Jianchao, making it more friendly
   wrt merging.

 - conversion of symbolic proc permissions to octal, from Joe Perches.
   Previously the block parts were a mix of both.

 - nbd fixes (Josef and Kevin Vigor)

 - unify how we handle the various kinds of timestamps that the block
   core and utility code uses (Omar)

 - three NVMe pull requests from Keith and Christoph, bringing AEN to
   feature completeness, file backed namespaces, cq/sq lock split, and
   various fixes

 - various little fixes and improvements all over the map

* tag 'for-4.18/block-20180603' of git://git.kernel.dk/linux-block: (196 commits)
  blk-mq: update nr_requests when switching to 'none' scheduler
  block: don't use blocking queue entered for recursive bio submits
  dm-crypt: fix warning in shutdown path
  lightnvm: pblk: take bitmap alloc. out of critical section
  lightnvm: pblk: kick writer on new flush points
  lightnvm: pblk: only try to recover lines with written smeta
  lightnvm: pblk: remove unnecessary bio_get/put
  lightnvm: pblk: add possibility to set write buffer size manually
  lightnvm: fix partial read error path
  lightnvm: proper error handling for pblk_bio_add_pages
  lightnvm: pblk: fix smeta write error path
  lightnvm: pblk: garbage collect lines with failed writes
  lightnvm: pblk: rework write error recovery path
  lightnvm: pblk: remove dead function
  lightnvm: pass flag on graceful teardown to targets
  lightnvm: pblk: check for chunk size before allocating it
  lightnvm: pblk: remove unnecessary argument
  lightnvm: pblk: remove unnecessary indirection
  lightnvm: pblk: return NVM_ error on failed submission
  lightnvm: pblk: warn in case of corrupted write buffer
  ...
 2018-06-04 07:58:06 -07:00
Hans de Goede 2cfce3a86b libata: Drop SanDisk SD7UB3Q*G1001 NOLPM quirk 
Commit 184add2ca2 ("libata: Apply NOLPM quirk for SanDisk
SD7UB3Q*G1001 SSDs") disabled LPM for SanDisk SD7UB3Q*G1001 SSDs.

This has lead to several reports of users of that SSD where LPM
was working fine and who know have a significantly increased idle
power consumption on their laptops.

Likely there is another problem on the T450s from the original
reporter which gets exposed by the uncore reaching deeper sleep
states (higher PC-states) due to LPM being enabled. The problem as
reported, a hardfreeze about once a day, already did not sound like
it would be caused by LPM and the reports of the SSD working fine
confirm this. The original reporter is ok with dropping the quirk.

A X250 user has reported the same hard freeze problem and for him
the problem went away after unrelated updates, I suspect some GPU
driver stack changes fixed things.

TL;DR: The original reporters problem were triggered by LPM but not
an LPM issue, so drop the quirk for the SSD in question.

BugLink: https://bugzilla.redhat.com/show_bug.cgi?id=1583207
Cc: stable@vger.kernel.org
Cc: Richard W.M. Jones <rjones@redhat.com>
Cc: Lorenzo Dalrio <lorenzo.dalrio@gmail.com>
Reported-by: Lorenzo Dalrio <lorenzo.dalrio@gmail.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: "Richard W.M. Jones" <rjones@redhat.com>
 2018-05-31 08:45:37 -07:00
Christoph Hellwig 01fc27d969 libata: remove ata_scsi_timed_out 
As far as I can tell this function can't even be called any more, given
that ATA implements its own eh_strategy_handler with ata_scsi_error, which
never calls ->eh_timed_out.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
 2018-05-29 08:47:40 -06:00
Dan Carpenter 18c9a99bce libata: zpodd: small read overflow in eject_tray() 
We read from the cdb[] buffer in ata_exec_internal_sg().  It has to be
ATAPI_CDB_LEN (16) bytes long, but this buffer is only 12 bytes.

Fixes: 213342053d ("libata: handle power transition of ODD")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: stable@vger.kernel.org
 2018-05-29 06:48:54 -07:00
Mika Westerberg 4544e403eb ahci: Add PCI ID for Cannon Lake PCH-LP AHCI 
This one should be using the default LPM policy for mobile chipsets so
add the PCI ID to the driver list of supported revices.

Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: stable@vger.kernel.org
 2018-05-24 07:03:32 -07:00
Sudip Mukherjee 136d769e0b libata: blacklist Micron 500IT SSD with MU01 firmware 
While whitelisting Micron M500DC drives, the tweaked blacklist entry
enabled queued TRIM from M500IT variants also. But these do not support
queued TRIM. And while using those SSDs with the latest kernel we have
seen errors and even the partition table getting corrupted.

Some part from the dmesg:
[    6.727384] ata1.00: ATA-9: Micron_M500IT_MTFDDAK060MBD, MU01, max UDMA/133
[    6.727390] ata1.00: 117231408 sectors, multi 16: LBA48 NCQ (depth 31/32), AA
[    6.741026] ata1.00: supports DRM functions and may not be fully accessible
[    6.759887] ata1.00: configured for UDMA/133
[    6.762256] scsi 0:0:0:0: Direct-Access     ATA      Micron_M500IT_MT MU01 PQ: 0 ANSI: 5

and then for the error:
[  120.860334] ata1.00: exception Emask 0x1 SAct 0x7ffc0007 SErr 0x0 action 0x6 frozen
[  120.860338] ata1.00: irq_stat 0x40000008
[  120.860342] ata1.00: failed command: SEND FPDMA QUEUED
[  120.860351] ata1.00: cmd 64/01:00:00:00:00/00:00:00:00:00/a0 tag 0 ncq dma 512 out
         res 40/00:00:00:00:00/00:00:00:00:00/00 Emask 0x5 (timeout)
[  120.860353] ata1.00: status: { DRDY }
[  120.860543] ata1: hard resetting link
[  121.166128] ata1: SATA link up 3.0 Gbps (SStatus 123 SControl 300)
[  121.166376] ata1.00: supports DRM functions and may not be fully accessible
[  121.186238] ata1.00: supports DRM functions and may not be fully accessible
[  121.204445] ata1.00: configured for UDMA/133
[  121.204454] ata1.00: device reported invalid CHS sector 0
[  121.204541] sd 0:0:0:0: [sda] tag#18 UNKNOWN(0x2003) Result: hostbyte=0x00 driverbyte=0x08
[  121.204546] sd 0:0:0:0: [sda] tag#18 Sense Key : 0x5 [current]
[  121.204550] sd 0:0:0:0: [sda] tag#18 ASC=0x21 ASCQ=0x4
[  121.204555] sd 0:0:0:0: [sda] tag#18 CDB: opcode=0x93 93 08 00 00 00 00 00 04 28 80 00 00 00 30 00 00
[  121.204559] print_req_error: I/O error, dev sda, sector 272512

After few reboots with these errors, and the SSD is corrupted.
After blacklisting it, the errors are not seen and the SSD does not get
corrupted any more.

Fixes: 243918be63 ("libata: Do not blacklist Micron M500DC")
Cc: Martin K. Petersen <martin.petersen@oracle.com>
Cc: stable@vger.kernel.org
Signed-off-by: Sudip Mukherjee <sudipm.mukherjee@gmail.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2018-05-21 08:24:20 -07:00
François Cami 76936e9a6d libata: Apply NOLPM quirk for SAMSUNG PM830 CXM13D1Q. 
Without this patch the drive errors out regularly:

[    1.090154] ata1.00: ATA-8: SAMSUNG SSD PM830 mSATA 256GB,
CXM13D1Q, max UDMA/133
(...)
[  345.154996] ata1.00: exception Emask 0x40 SAct 0x0 SErr 0xc0800 action 0x6
[  345.155006] ata1.00: irq_stat 0x40000001
[  345.155013] ata1: SError: { HostInt CommWake 10B8B }
[  345.155018] ata1.00: failed command: SET FEATURES
[  345.155032] ata1.00: cmd ef/05:e1:00:00:00/00:00:00:00:00/40 tag 7
                        res 51/04:e1:00:00:00/00:00:00:00:00/40 Emask 0x41 (internal error)
[  345.155038] ata1.00: status: { DRDY ERR }
[  345.155042] ata1.00: error: { ABRT }
[  345.155051] ata1: hard resetting link
[  345.465661] ata1: SATA link up 6.0 Gbps (SStatus 133 SControl 300)
[  345.466955] ata1.00: configured for UDMA/133
[  345.467085] ata1: EH complete

Signed-off-by: François Cami <fcami@fedoraproject.org>
Acked-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2018-05-14 08:31:51 -07:00
Jens Axboe 88e10092f6 sata_fsl: use the right type for tag bitshift 
Since ATA_TAG_INTERNAL is now > 31 bits, we need to extend the
type to ULL to cover 32/64-bit cases.

Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2018-05-14 08:14:21 -07:00
Jens Axboe e2d1f8a06e ahci: enable full queue depth of 32 
This changes the AHCI queue depth from 31 to 32, as libata now
fully supports it. Now regular IO requests can utilize the full
tag space of SATA, not just 31. For IOPS constrained workloads,
this can result in a ~3% bump in performance.

Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2018-05-11 13:10:44 -07:00
Jens Axboe 69278f790b libata: don't clamp queue depth to ATA_MAX_QUEUE - 1 
Use what the driver provides, which will still be ATA_MAX_QUEUE - 1
at most anyway.

Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2018-05-11 13:10:44 -07:00
Jens Axboe 28361c4036 libata: add extra internal command 
Bump the internal tag to 32, instead of stealing the last tag in
our regular command space. This works just fine, since we don't
actually need a separate hardware tag for this. Internal commands
cannot coexist with NCQ commands.

As a bonus, we get rid of the special casing of what tag to use
for the internal command.

This is in preparation for utilizing all 32 commands for normal IO.

Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2018-05-11 13:10:44 -07:00
Jens Axboe ba80c3a572 sata_nv: set host can_queue count appropriately 
libata limits the max limit for drivers to 31 anyway. We'll soon
allow drivers to actually go to QD=32, but that might require some
driver modifications. Before we do that, ensure that sata_nv limits
the depth to 31.

Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2018-05-11 13:10:43 -07:00
Jens Axboe 9d207accca libata: remove assumption that ATA_MAX_QUEUE - 1 is the max 
In a few spots we iterate to ATA_MAX_QUEUE -1, including internal
knowledge that the last tag is the internal tag. Remove this
assumption.

Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2018-05-11 13:10:43 -07:00
Jens Axboe 2e2cc676ce libata: use ata_tag_internal() consistently 
Some check for the value directly, use the provided helper instead.
Also make it return a bool, since that's what it does.

Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2018-05-11 13:10:43 -07:00
Jens Axboe e3ed893964 libata: bump ->qc_active to a 64-bit type 
This is in preparation for allowing full usage of the tag space,
which means that our reserved error handling command will be
using an internal tag value of 32. This doesn't fit in a u32, so
move to a u64.

Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2018-05-11 13:10:43 -07:00
Jens Axboe 4e5b6260cc libata: convert core and drivers to ->hw_tag usage 
Anything that goes to the hardware should use ->hw_tag, anything
related to internal lookup should be using ->tag.

Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2018-05-11 13:10:43 -07:00
Jens Axboe 5ac40790b4 libata: introduce notion of separate hardware tags 
Rigth now these are the same, but drivers should be using ->hw_tag
for their command setup and issue.

Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2018-05-11 13:10:42 -07:00
Damien Le Moal 804689ad2d libata: Fix command retry decision 
For failed commands with valid sense data (e.g. NCQ commands),
scsi_check_sense() is used in ata_analyze_tf() to determine if the
command can be retried. In such case, rely on this decision and ignore
the command error mask based decision done in ata_worth_retry().

This fixes useless retries of commands such as unaligned writes on zoned
disks (TYPE_ZAC).

Signed-off-by: Damien Le Moal <damien.lemoal@wdc.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2018-05-10 11:43:20 -07:00
Damien Le Moal 7eb49509dd libata: Honor RQF_QUIET flag 
Currently, libata ignores requests RQF_QUIET flag and print error
messages for failed commands, regardless if this flag is set in the
command request. Fix this by introducing the ata_eh_quiet() function and
using this function in ata_eh_link_autopsy() to determine if the EH
context should be quiet. This works by counting the number of failed
commands and the number of commands with the quiet flag set. If both
numbers are equal, the the EH context can be set to quiet and all error
messages suppressed. Otherwise, only the error messages for the failed
commands are suppressed and the link Emask and irq_stat messages printed.

Signed-off-by: Damien Le Moal <damien.lemoal@wdc.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2018-05-10 11:43:20 -07:00
Damien Le Moal 07b9b6d6e1 libata: Make ata_dev_set_mode() less verbose 
For a successful setting of the device transfer speed mode in
ata_dev_set_mode(), do not print the message
"ataX.XX: configured for xxx" if the EH context has the quiet flag set,
unless the device port is being reset.

This preserves the output of the message during device scan but removes
it in the case of a simple device revalidation such as trigerred by
enabling the NCQ I/O priority feature of the device
e.g. echo 1 > /sys/block/sdxx/device/ncq_iprio_enable

Signed-off-by: Damien Le Moal <damien.lemoal@wdc.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2018-05-10 11:43:20 -07:00
Damien Le Moal 54fb131b32 libata: Fix ata_err_string() 
Add proper error string output for ATA_ERR_NCQ and ATA_ERR_NODEV_HINT
instead of returning "unknown error".

Signed-off-by: Damien Le Moal <damien.lemoal@wdc.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2018-05-10 11:43:20 -07:00
Damien Le Moal 79487259a4 libata: Fix comment typo in ata_eh_analyze_tf() 
Signed-off-by: Damien Le Moal <damien.lemoal@wdc.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2018-05-10 11:43:19 -07:00
Christoph Hellwig 258c9fded4 sata_nv: don't use block layer bounce buffer 
sata_nv sets the block bounce limit to the reduce dma mask for ATAPI
devices, which means that the iommu or swiotlb already take care of
the bounce buffering, and the block bouncing can be removed.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2018-05-10 11:37:28 -07:00
Tejun Heo 322579dcc8 libata: Blacklist some Sandisk SSDs for NCQ 
Sandisk SSDs SD7SN6S256G and SD8SN8U256G are regularly locking up
regularly under sustained moderate load with NCQ enabled.  Blacklist
for now.

Signed-off-by: Tejun Heo <tj@kernel.org>
Reported-by: Dave Jones <davej@codemonkey.org.uk>
Cc: stable@vger.kernel.org
 2018-05-08 14:28:01 -07:00
Andy Shevchenko dc85ca573b ata: hpt37x: Convert to use match_string() helper 
The new helper returns index of the matching string in an array.
We are going to use it here.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2018-05-07 08:50:30 -07:00
Mathieu Malaterre 0d74d872c3 driver core: add __printf verification to __ata_ehi_pushv_desc 
__printf is useful to verify format and arguments. Remove the following
warning (with W=1):

  drivers/ata/libata-eh.c:183:10: warning: function might be possible candidate for ‘gnu_printf’ format attribute [-Wsuggest-attribute=format]

Signed-off-by: Mathieu Malaterre <malat@debian.org>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2018-05-07 08:32:20 -07:00
Colin Ian King 7e437d6151 ata: fix spelling mistake: "directon" -> "direction" 
Trivial fix to spelling mistake in sil24_cerr_info message text

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2018-05-01 10:39:49 -07:00
Hans de Goede 184add2ca2 libata: Apply NOLPM quirk for SanDisk SD7UB3Q*G1001 SSDs 
Richard Jones has reported that using med_power_with_dipm on a T450s
with a Sandisk SD7UB3Q256G1001 SSD (firmware version X2180501) is
causing the machine to hang.

Switching the LPM to max_performance fixes this, so it seems that
this Sandisk SSD does not handle LPM well.

Note in the past there have been bug-reports about the following
Sandisk models not working with min_power, so we may need to extend
the quirk list in the future: name - firmware
Sandisk SD6SB2M512G1022I   - X210400
Sandisk SD6PP4M-256G-1006  - A200906

Cc: stable@vger.kernel.org
Cc: Richard W.M. Jones <rjones@redhat.com>
Reported-and-tested-by: Richard W.M. Jones <rjones@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2018-04-26 14:08:55 -07:00
Hans de Goede b5b4d3a52c libata: Apply NOLPM quirk for SAMSUNG MZMPC128HBFU-000MV SSD 
Kevin Shanahan reports the following repeating errors when using LPM,
causing long delays accessing the disk:

  Apr 23 10:21:43 link kernel: ata1.00: exception Emask 0x0 SAct 0x0 SErr 0x50000 action 0x6 frozen
  Apr 23 10:21:43 link kernel: ata1: SError: { PHYRdyChg CommWake }
  Apr 23 10:21:43 link kernel: ata1.00: failed command: WRITE DMA
  Apr 23 10:21:43 link kernel: ata1.00: cmd ca/00:08:60:5d:cd/00:00:00:00:00/e1 tag 9 dma 4096 out
                                        res 50/01:01:01:00:00/00:00:00:00:00/00 Emask 0x4 (timeout)
  Apr 23 10:21:43 link kernel: ata1.00: status: { DRDY }
  Apr 23 10:21:43 link kernel: ata1.00: error: { AMNF }
  Apr 23 10:21:43 link kernel: ata1: hard resetting link
  Apr 23 10:21:43 link kernel: ata1: SATA link up 6.0 Gbps (SStatus 133 SControl 300)
  Apr 23 10:21:43 link kernel: ata1.00: configured for UDMA/133
  Apr 23 10:21:43 link kernel: ata1: EH complete

These go away when switching from med_power_with_dipm to medium_power.

This is somewhat weird as the PM830 datasheet explicitly mentions DIPM
being supported and the idle power-consumption is specified with DIPM
enabled.

There are many OEM customized firmware versions for the PM830, so for now
lets assume this is firmware version specific and blacklist LPM based on
the firmware version.

Cc: Kevin Shanahan <kevin@shanahan.id.au>
Reported-by: Kevin Shanahan <kevin@shanahan.id.au>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2018-04-26 11:46:23 -07:00
Evan Wang daa2e3bdbb ata: ahci: mvebu: override ahci_stop_engine for mvebu AHCI 
There is an issue(Errata Ref#226) that the SATA can not be
detected via SATA Port-MultiPlayer(PMP) with following
error log:
  ata1.15: PMP product ID mismatch
  ata1.15: SATA link up 6.0 Gbps (SStatus 133 SControl 300)
  ata1.15: Port Multiplier vendor mismatch '0x1b4b'!='0x0'
  ata1.15: PMP revalidation failed (errno=-19)

After debugging, the reason is found that the value Port-x
FIS-based Switching Control(PxFBS@0x40) become wrong.
According to design, the bits[11:8, 0] of register PxFBS
are cleared when Port Command and Status (0x18) bit[0]
changes its value from 1 to 0, i.e. falling edge of Port
Command and Status bit[0] sends PULSE that resets PxFBS
bits[11:8; 0].
So it needs a mvebu SATA WA to save the port PxFBS register
before PxCMD ST write and restore it afterwards.

This patch implements the WA in a separate function of
ahci_mvebu_stop_engine to override ahci_stop_gngine.

Signed-off-by: Evan Wang <xswang@marvell.com>
Cc: Ofer Heifetz <oferh@marvell.com>
Cc: Tejun Heo <tj@kernel.org>
Cc: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2018-04-26 11:25:15 -07:00
Evan Wang fa89f53bd7 libahci: Allow drivers to override stop_engine 
Marvell armada37xx, armada7k and armada8k share the same
AHCI sata controller IP, and currently there is an issue
(Errata Ref#226)that the SATA can not be detected via SATA
Port-MultiPlayer(PMP). After debugging, the reason is
found that the value of Port-x FIS-based Switching Control
(PxFBS@0x40) became wrong.
According to design, the bits[11:8, 0] of register PxFBS
are cleared when Port Command and Status (0x18) bit[0]
changes its value from 1 to 0, i.e. falling edge of Port
Command and Status bit[0] sends PULSE that resets PxFBS
bits[11:8; 0].
So it needs save the port PxFBS register before PxCMD
ST write and restore the port PxFBS register afterwards
in ahci_stop_engine().

This commit allows drivers to override ahci_stop_engine
behavior for use by the Marvell AHCI driver(and potentially
other drivers in the future).

Signed-off-by: Evan Wang <xswang@marvell.com>
Cc: Ofer Heifetz <oferh@marvell.com>
Cc: Tejun Heo <tj@kernel.org>
Cc: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2018-04-26 11:25:04 -07:00
Jason Yan b6240a4df0 scsi: libsas: add transport class for ATA devices 
Now ata devices attached with sas controller do not have transport
class, so that we can not see any information of these ata devices in
/sys/class/ata_port(or ata_link or ata_device).

Add transport class for the ata devices attached with sas controller.
The /sys/class directory will show the infomation of the ata devices
as follows:

localhost:/sys/class # ls ata*
ata_device:
dev1.0  dev2.0

ata_link:
link1  link2

ata_port:
ata1  ata2

No functional change of the device scanning and io path. The ata
transport class was deleted when destroying the sas devices.

Signed-off-by: Jason Yan <yanaijie@huawei.com>
CC: Dan Williams <dan.j.williams@intel.com>
CC: Tejun Heo <tj@kernel.org>
Acked-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
 2018-04-18 19:32:51 -04:00
Kunihiko Hayashi fd17ed684b Revert "ata: ahci-platform: add reset control support" 
This reverts commit f0f56716fc.

According to Thierry's view,
https://www.spinics.net/lists/linux-ide/msg55357.html
some hardware-specific drivers already use their own resets,
and the common reset might make a path to occur double controls of resets.

For now, revert the commit that adds reset control support to ahci-platform,
and hold until the solution is confirmed not be affect all hardware-specific
drivers.

Fixes: f0f56716fc ("ata: ahci-platform: add reset control support")
Reported-by: Thierry Reding <thierry.reding@gmail.com>
Suggested-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Kunihiko Hayashi <hayashi.kunihiko@socionext.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2018-04-09 15:10:50 -07:00
Linus Torvalds a23867f1d2 Merge branch 'for-4.17' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/libata 
Pull libata updates from Tejun Heo:
 "Nothing too interesting.

  The biggest change is refcnting fix for ata_host - the bug is recent
  and can only be triggered on controller hotplug, so very few are
  hitting it.

  There also are a number of trivial license / error message changes and
  some hardware specific changes"

* 'for-4.17' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/libata: (23 commits)
  ahci: imx: add the imx8qm ahci sata support
  libata: ensure host is free'd on error exit paths
  ata: ahci-platform: add reset control support
  ahci: imx: fix the build warning
  ata: add Amiga Gayle PATA controller driver
  ahci: imx: add the imx6qp ahci sata support
  ata: change Tegra124 to Tegra
  ata: ahci_tegra: Add AHCI support for Tegra210
  ata: ahci_tegra: disable DIPM
  ata: ahci_tegra: disable devslp for Tegra124
  ata: ahci_tegra: initialize regulators from soc struct
  ata: ahci_tegra: Update initialization sequence
  dt-bindings: Tegra210: add binding documentation
  libata: add refcounting to ata_host
  pata_bk3710: clarify license version and use SPDX header
  pata_falcon: clarify license version and use SPDX header
  pata_it821x: Delete an error message for a failed memory allocation in it821x_firmware_command()
  pata_macio: Delete an error message for a failed memory allocation in two functions
  pata_mpc52xx: Delete an error message for a failed memory allocation in mpc52xx_ata_probe()
  sata_dwc_460ex: Delete an error message for a failed memory allocation in sata_dwc_port_start()
  ...
 2018-04-03 17:42:25 -07:00
Linus Torvalds e40dc66220 LED updates for 4.17-rc1 
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Merge tag 'leds_for_4.17-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/j.anaszewski/linux-leds

Pull LED updates from Jacek Anaszewski:
 "New LED class driver:
   - add driver for Mellanox regmap LEDs

  Improvement to ledtrig-disk:
   - extend disk trigger for reads and writes

  Improvements and fixes to existing LED class drivers:
   - add more product/board names for PC Engines APU2
   - fix wrong dmi_match on PC Engines APU LEDs
   - clarify chips supported by LM355x driver
   - fix Kconfig text for MLXCPLD, SYSCON, MC13783, NETXBIG
   - allow leds-mlxcpld compilation for 32 bit arch"

* tag 'leds_for_4.17-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/j.anaszewski/linux-leds:
  leds: Fix wrong dmi_match on PC Engines APU LEDs
  leds: Extends disk trigger for reads and writes
  leds: Add more product/board names for PC Engines APU2
  leds: add driver for support Mellanox regmap LEDs for BMC and x86 platform
  leds: fix Kconfig text for MLXCPLD, SYSCON, MC13783, NETXBIG
  leds: Clarify supported chips by LM355x driver
  leds: leds-mlxcpld: Allow compilation for 32 bit arch
 2018-04-03 12:38:19 -07:00
Linus Torvalds f5a8eb632b arch: remove obsolete architecture ports 
This removes the entire architecture code for blackfin, cris, frv, m32r,
 metag, mn10300, score, and tile, including the associated device drivers.
 
 I have been working with the (former) maintainers for each one to ensure
 that my interpretation was right and the code is definitely unused in
 mainline kernels. Many had fond memories of working on the respective
 ports to start with and getting them included in upstream, but also saw
 no point in keeping the port alive without any users.
 
 In the end, it seems that while the eight architectures are extremely
 different, they all suffered the same fate: There was one company
 in charge of an SoC line, a CPU microarchitecture and a software
 ecosystem, which was more costly than licensing newer off-the-shelf
 CPU cores from a third party (typically ARM, MIPS, or RISC-V). It seems
 that all the SoC product lines are still around, but have not used the
 custom CPU architectures for several years at this point. In contrast,
 CPU instruction sets that remain popular and have actively maintained
 kernel ports tend to all be used across multiple licensees.
 
 The removal came out of a discussion that is now documented at
 https://lwn.net/Articles/748074/. Unlike the original plans, I'm not
 marking any ports as deprecated but remove them all at once after I made
 sure that they are all unused. Some architectures (notably tile, mn10300,
 and blackfin) are still being shipped in products with old kernels,
 but those products will never be updated to newer kernel releases.
 
 After this series, we still have a few architectures without mainline
 gcc support:
 
 - unicore32 and hexagon both have very outdated gcc releases, but the
   maintainers promised to work on providing something newer. At least
   in case of hexagon, this will only be llvm, not gcc.
 
 - openrisc, risc-v and nds32 are still in the process of finishing their
   support or getting it added to mainline gcc in the first place.
   They all have patched gcc-7.3 ports that work to some degree, but
   complete upstream support won't happen before gcc-8.1. Csky posted
   their first kernel patch set last week, their situation will be similar.
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Merge tag 'arch-removal' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic

Pul removal of obsolete architecture ports from Arnd Bergmann:
 "This removes the entire architecture code for blackfin, cris, frv,
  m32r, metag, mn10300, score, and tile, including the associated device
  drivers.

  I have been working with the (former) maintainers for each one to
  ensure that my interpretation was right and the code is definitely
  unused in mainline kernels. Many had fond memories of working on the
  respective ports to start with and getting them included in upstream,
  but also saw no point in keeping the port alive without any users.

  In the end, it seems that while the eight architectures are extremely
  different, they all suffered the same fate: There was one company in
  charge of an SoC line, a CPU microarchitecture and a software
  ecosystem, which was more costly than licensing newer off-the-shelf
  CPU cores from a third party (typically ARM, MIPS, or RISC-V). It
  seems that all the SoC product lines are still around, but have not
  used the custom CPU architectures for several years at this point. In
  contrast, CPU instruction sets that remain popular and have actively
  maintained kernel ports tend to all be used across multiple licensees.

  [ See the new nds32 port merged in the previous commit for the next
    generation of "one company in charge of an SoC line, a CPU
    microarchitecture and a software ecosystem"   - Linus ]

  The removal came out of a discussion that is now documented at
  https://lwn.net/Articles/748074/. Unlike the original plans, I'm not
  marking any ports as deprecated but remove them all at once after I
  made sure that they are all unused. Some architectures (notably tile,
  mn10300, and blackfin) are still being shipped in products with old
  kernels, but those products will never be updated to newer kernel
  releases.

  After this series, we still have a few architectures without mainline
  gcc support:

   - unicore32 and hexagon both have very outdated gcc releases, but the
     maintainers promised to work on providing something newer. At least
     in case of hexagon, this will only be llvm, not gcc.

   - openrisc, risc-v and nds32 are still in the process of finishing
     their support or getting it added to mainline gcc in the first
     place. They all have patched gcc-7.3 ports that work to some
     degree, but complete upstream support won't happen before gcc-8.1.
     Csky posted their first kernel patch set last week, their situation
     will be similar

  [ Palmer Dabbelt points out that RISC-V support is in mainline gcc
    since gcc-7, although gcc-7.3.0 is the recommended minimum  - Linus ]"

This really says it all:

 2498 files changed, 95 insertions(+), 467668 deletions(-)

* tag 'arch-removal' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic: (74 commits)
  MAINTAINERS: UNICORE32: Change email account
  staging: iio: remove iio-trig-bfin-timer driver
  tty: hvc: remove tile driver
  tty: remove bfin_jtag_comm and hvc_bfin_jtag drivers
  serial: remove tile uart driver
  serial: remove m32r_sio driver
  serial: remove blackfin drivers
  serial: remove cris/etrax uart drivers
  usb: Remove Blackfin references in USB support
  usb: isp1362: remove blackfin arch glue
  usb: musb: remove blackfin port
  usb: host: remove tilegx platform glue
  pwm: remove pwm-bfin driver
  i2c: remove bfin-twi driver
  spi: remove blackfin related host drivers
  watchdog: remove bfin_wdt driver
  can: remove bfin_can driver
  mmc: remove bfin_sdh driver
  input: misc: remove blackfin rotary driver
  input: keyboard: remove bf54x driver
  ...
 2018-04-02 20:20:12 -07:00
Richard Zhu 027fa4dee9 ahci: imx: add the imx8qm ahci sata support 
- There are three PHY lanes on iMX8QM, and can be
  used in the following three cases
    1. a two lanes PCIE_A, and a single lane SATA.
    2. a single lane PCIE_A, a single lane PCIE_B
    and a single lane SATA.
    3. a two lanes PCIE_A, and a single lane PCIE_B.
  The configuration of the iMX8QM AHCI SATA is relied
  on the usage of PCIE ports in the case 1 and 2.
  Use standalone iMX8 AHCI SATA probe and enable
  functions to enable iMX8QM AHCI SATA support.
- To save power consumption, PHY CLKs can be gated
  off after the configurations are done.
- The impedance ratio should be configured refer to
  differnet REXT values.
  0x6c <--> REXT value is 85Ohms
  0x80 (default value) <--> REXT value is 100Ohms.
  In general, REXT value should be 85ohms in standalone
  PCIE HW board design, and 100ohms in SATA standalone
  HW board design.
  When the PCIE and the SATA are enabled simultaneously
  in the HW board design. The REXT value would be set
  to 85ohms.
  Configure the SATA PHY impedance ratio to 0x6c in
  default.

Signed-off-by: Richard Zhu <hongxing.zhu@nxp.com>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2018-03-29 06:43:55 -07:00
Colin Ian King dafd6c4963 libata: ensure host is free'd on error exit paths 
The host structure is not being kfree'd on two error exit paths
leading to memory leaks. Add in new err_free label and kfree host.

Detected by CoverityScan, CID#1466103 ("Resource leak")

Fixes: 2623c7a5f2 ("libata: add refcounting to ata_host")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2018-03-27 06:56:02 -07:00
Kunihiko Hayashi f0f56716fc ata: ahci-platform: add reset control support 
Add support to get and control a list of resets for the device
as optional and shared. These resets must be kept de-asserted until
the device is enabled.

This is specified as shared because some SoCs like UniPhier series
have common reset controls with all ahci controller instances.

Signed-off-by: Kunihiko Hayashi <hayashi.kunihiko@socionext.com>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2018-03-26 07:40:01 -07:00
Arnd Bergmann c44734a875 ata: remove bf54x driver 
The blackfin architecture is getting removed, so this driver
is obsolete as well.

Acked-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
 2018-03-26 15:56:56 +02:00
Richard Zhu 3d6f22b74d ahci: imx: fix the build warning 
Add the default as the last entry to fix the following
build warning introduced by commit.
e5878732a5 ("ahci: imx: add the imx6qp ahci sata support")

drivers/ata/ahci_imx.c: In function 'imx_sata_disable':
drivers/ata/ahci_imx.c:478:2: warning: enumeration value 'AHCI_IMX53'
not handled in switch [-Wswitch]
  switch (imxpriv->type) {
	    ^~~~~~

Signed-off-by: Richard Zhu <hongxing.zhu@nxp.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2018-03-21 08:04:07 -07:00
Hans de Goede d418ff56b8 libata: Modify quirks for MX100 to limit NCQ_TRIM quirk to MU01 version 
When commit 9c7be59fc5 ("libata: Apply NOLPM quirk to Crucial MX100
512GB SSDs") was added it inherited the ATA_HORKAGE_NO_NCQ_TRIM quirk
from the existing "Crucial_CT*MX100*" entry, but that entry sets model_rev
to "MU01", where as the entry adding the NOLPM quirk sets it to NULL.

This means that after this commit we no apply the NO_NCQ_TRIM quirk to
all "Crucial_CT512MX100*" SSDs even if they have the fixed "MU02"
firmware. This commit splits the "Crucial_CT512MX100*" quirk into 2
quirks, one for the "MU01" firmware and one for all other firmware
versions, so that we once again only apply the NO_NCQ_TRIM quirk to the
"MU01" firmware version.

Fixes: 9c7be59fc5 ("libata: Apply NOLPM quirk to ... MX100 512GB SSDs")
Cc: stable@vger.kernel.org
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2018-03-19 08:36:38 -07:00
Hans de Goede 3bf7b5d6d0 libata: Make Crucial BX100 500GB LPM quirk apply to all firmware versions 
Commit b17e5729a6 ("libata: disable LPM for Crucial BX100 SSD 500GB
drive"), introduced a ATA_HORKAGE_NOLPM quirk for Crucial BX100 500GB SSDs
but limited this to the MU02 firmware version, according to:
http://www.crucial.com/usa/en/support-ssd-firmware

MU02 is the last version, so there are no newer possibly fixed versions
and if the MU02 version has broken LPM then the MU01 almost certainly
also has broken LPM, so this commit changes the quirk to apply to all
firmware versions.

Fixes: b17e5729a6 ("libata: disable LPM for Crucial BX100 SSD 500GB...")
Cc: stable@vger.kernel.org
Cc: Kai-Heng Feng <kai.heng.feng@canonical.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2018-03-19 08:36:38 -07:00
Hans de Goede 62ac3f7305 libata: Apply NOLPM quirk to Crucial M500 480 and 960GB SSDs 
There have been reports of the Crucial M500 480GB model not working
with LPM set to min_power / med_power_with_dipm level.

It has not been tested with medium_power, but that typically has no
measurable power-savings.

Note the reporters Crucial_CT480M500SSD3 has a firmware version of MU03
and there is a MU05 update available, but that update does not mention any
LPM fixes in its changelog, so the quirk matches all firmware versions.

In my experience the LPM problems with (older) Crucial SSDs seem to be
limited to higher capacity versions of the SSDs (different firmware?),
so this commit adds a NOLPM quirk for the 480 and 960GB versions of the
M500, to avoid LPM causing issues with these SSDs.

Cc: stable@vger.kernel.org
Reported-and-tested-by: Martin Steigerwald <martin@lichtvoll.de>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2018-03-19 08:36:38 -07:00
Bartlomiej Zolnierkiewicz 9ab27d1d35 ata: add Amiga Gayle PATA controller driver 
Add Amiga Gayle PATA controller driver. It enables libata support
for the on-board IDE interfaces on some Amiga models (A600, A1200,
A4000 and A4000T) and also for IDE interfaces on the Zorro expansion
bus (M-Tech E-Matrix 530 expansion card).

Thanks to John Paul Adrian Glaubitz and Michael Schmitz for help
with testing the driver.

Tested-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
Cc: Michael Schmitz <schmitzmic@gmail.com>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Philippe Ombredanne <pombredanne@nexb.com>
Cc: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2018-03-19 07:41:36 -07:00
Richard Zhu e5878732a5 ahci: imx: add the imx6qp ahci sata support 
- Regarding to imx6q ahci sata, imx6qp ahci sata
has the reset mechanism. Add the imx6qp ahci sata
support in this commit.
- Use the specific reset callback for imx53 sata,
and use the default ahci_ops.softreset for the others.

Signed-off-by: Richard Zhu <hongxing.zhu@nxp.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2018-03-19 07:34:08 -07:00
Preetham Ramchandra 34d232eb2d ata: change Tegra124 to Tegra 
ahci_tegra driver now supports Tegra124, Tegra132 and Tegra210,
so change Tegra124 to Tegra.

Signed-off-by: Preetham Chandru R <pchandru@nvidia.com>
Acked-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2018-03-14 08:24:21 -07:00
Preetham Ramchandra 294840feef ata: ahci_tegra: Add AHCI support for Tegra210 
Add support for the AHCI-compliant Serial ATA host controller on the
Tegra210 system-on-chip.

Signed-off-by: Preetham Chandru R <pchandru@nvidia.com>
Acked-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2018-03-14 08:24:21 -07:00
Preetham Ramchandra 01fbf60b0e ata: ahci_tegra: disable DIPM 
Tegra does not support DIPM and it should be disabled.

Signed-off-by: Preetham Chandru R <pchandru@nvidia.com>
Acked-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2018-03-14 08:24:21 -07:00
Preetham Ramchandra 502717ccf7 ata: ahci_tegra: disable devslp for Tegra124 
Tegra124 does not support devslp and it should be disabled.

Signed-off-by: Preetham Chandru R <pchandru@nvidia.com>
Acked-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2018-03-14 08:24:20 -07:00
Preetham Ramchandra 43ee827b56 ata: ahci_tegra: initialize regulators from soc struct 
Get the regulator names to be initialized from soc structure
and initialize them.

Signed-off-by: Preetham Chandru R <pchandru@nvidia.com>
Acked-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2018-03-14 08:24:20 -07:00
Preetham Ramchandra 56337b5576 ata: ahci_tegra: Update initialization sequence 
Update the controller initialization sequence and move Tegra124
specifics to tegra124_ahci_init.

Signed-off-by: Preetham Chandru R <pchandru@nvidia.com>
Acked-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2018-03-14 08:24:20 -07:00
Ju Hyung Park ca6bfcb2f6 libata: Enable queued TRIM for Samsung SSD 860 
Samsung explicitly states that queued TRIM is supported for Linux with
860 PRO and 860 EVO.

Make the previous blacklist to cover only 840 and 850 series.

Signed-off-by: Park Ju Hyung <qkrwngud825@gmail.com>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: stable@vger.kernel.org
 2018-03-14 06:45:26 -07:00
Taras Kondratiuk 2623c7a5f2 libata: add refcounting to ata_host 
After commit 9a6d6a2dda ("ata: make ata port as parent device of scsi
host") manual driver unbind/remove causes use-after-free.

Unbind unconditionally invokes devres_release_all() which calls
ata_host_release() and frees ata_host/ata_port memory while it is still
being referenced as a parent of SCSI host. When SCSI host is finally
released scsi_host_dev_release() calls put_device(parent) and accesses
freed ata_port memory.

Add reference counting to make sure that ata_host lives long enough.

Bug report: https://lkml.org/lkml/2017/11/1/945
Fixes: 9a6d6a2dda ("ata: make ata port as parent device of scsi host")
Cc: Tejun Heo <tj@kernel.org>
Cc: Lin Ming <minggr@gmail.com>
Cc: linux-ide@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Taras Kondratiuk <takondra@cisco.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2018-03-13 13:29:10 -07:00
Linus Walleij d1ed7c5586 leds: Extends disk trigger for reads and writes 
This adds two new disk triggers for triggering on reads
and writes respectively, named "disk-read" and "disk-write".

The use case comes from working on the D-Link DNS-313 NAS
box. This features an RGB LED for disk activity. with
these two triggers I can couple the green LED to read
activity and the red LED to write activity, which gives
the appropriate user feedback about what is happening
on the disk. When tested it gave exactly the feedback
desired.

The in-kernel interface is simply changed to pass a bool
indicating if the activity is write activity and update
each trigger (and the composite "disk-activity" trigger)
depending on what is passed in.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Acked-by: Pavel Machek <pavel@ucw.cz>
Acked-by: Tejun Heo <tj@kernel.org>
Acked-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Jacek Anaszewski <jacek.anaszewski@gmail.com>
 2018-03-11 20:01:55 +01:00
Hans de Goede 28b2182dad ahci: Add PCI-id for the Highpoint Rocketraid 644L card 
Like the Highpoint Rocketraid 642L and cards using a Marvel 88SE9235
controller in general, this RAID card also supports AHCI mode and short
of a custom driver, this is the only way to make it work under Linux.

Note that even though the card is called to 644L, it has a product-id
of 0x0645.

Cc: stable@vger.kernel.org
BugLink: https://bugzilla.redhat.com/show_bug.cgi?id=1534106
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
 2018-03-04 12:35:36 -08:00
Bartlomiej Zolnierkiewicz a80ea4cb94 pata_bk3710: clarify license version and use SPDX header 
- clarify license version (it should be GPL 2.0)
- use SPDX header

Acked-by: Sekhar Nori <nsekhar@ti.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2018-03-01 13:59:03 -08:00
Bartlomiej Zolnierkiewicz 7f1d5c9dea pata_falcon: clarify license version and use SPDX header 
- clarify license version (it should be GPL 2.0)
- use SPDX header

Cc: Michael Schmitz <schmitzmic@gmail.com>
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2018-03-01 13:58:17 -08:00
Jason Yan 6f54120e17 ata: do not schedule hot plug if it is a sas host 
We've got a kernel panic when using sata disk with sas controller:

[115946.152283] Unable to handle kernel NULL pointer dereference at virtual address 000007d8
[115946.223963] CPU: 0 PID: 22175 Comm: kworker/0:1 Tainted: G   W OEL  4.14.0 #1
[115946.232925] Workqueue: events ata_scsi_hotplug
[115946.237938] task: ffff8021ee50b180 task.stack: ffff00000d5d0000
[115946.244717] PC is at sas_find_dev_by_rphy+0x44/0x114
[115946.250224] LR is at sas_find_dev_by_rphy+0x3c/0x114
......
[115946.355701] Process kworker/0:1 (pid: 22175, stack limit = 0xffff00000d5d0000)
[115946.363369] Call trace:
[115946.456356] [<ffff000008878a9c>] sas_find_dev_by_rphy+0x44/0x114
[115946.462908] [<ffff000008878b8c>] sas_target_alloc+0x20/0x5c
[115946.469408] [<ffff00000885a31c>] scsi_alloc_target+0x250/0x308
[115946.475781] [<ffff00000885ba30>] __scsi_add_device+0xb0/0x154
[115946.481991] [<ffff0000088b520c>] ata_scsi_scan_host+0x180/0x218
[115946.488367] [<ffff0000088b53d8>] ata_scsi_hotplug+0xb0/0xcc
[115946.494801] [<ffff0000080ebd70>] process_one_work+0x144/0x390
[115946.501115] [<ffff0000080ec100>] worker_thread+0x144/0x418
[115946.507093] [<ffff0000080f2c98>] kthread+0x10c/0x138
[115946.512792] [<ffff0000080855dc>] ret_from_fork+0x10/0x18

We found that Ding Xiang has reported a similar bug before:
https://patchwork.kernel.org/patch/9179817/

And this bug still exists in mainline. Since libsas handles hotplug and
device adding/removing itself, do not need to schedule ata hot plug task
here if it is a sas host.

Signed-off-by: Jason Yan <yanaijie@huawei.com>
Cc: Ding Xiang <dingxiang@huawei.com>
Cc: stable@vger.kernel.org
Signed-off-by: Tejun Heo <tj@kernel.org>
 2018-03-01 13:53:09 -08:00
Kai-Heng Feng b17e5729a6 libata: disable LPM for Crucial BX100 SSD 500GB drive 
After Laptop Mode Tools starts to use min_power for LPM, a user found
out Crucial BX100 SSD can't get mounted.

Crucial BX100 SSD 500GB drive don't work well with min_power. This also
happens to med_power_with_dipm.

So let's disable LPM for Crucial BX100 SSD 500GB drive.

BugLink: https://bugs.launchpad.net/bugs/1726930
Signed-off-by: Kai-Heng Feng <kai.heng.feng@canonical.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: stable@vger.kernel.org
 2018-02-20 13:30:42 -08:00
Hans de Goede 9c7be59fc5 libata: Apply NOLPM quirk to Crucial MX100 512GB SSDs 
Various people have reported the Crucial MX100 512GB model not working
with LPM set to min_power. I've now received a report that it also does
not work with the new med_power_with_dipm level.

It does work with medium_power, but that has no measurable power-savings
and given the amount of people being bitten by the other levels not
working, this commit just disables LPM altogether.

Note all reporters of this have either the 512GB model (max capacity), or
are not specifying their SSD's size. So for now this quirk assumes this is
a problem with the 512GB model only.

Buglink: https://bugzilla.kernel.org/show_bug.cgi?id=89261
Buglink: https://github.com/linrunner/TLP/issues/84
Cc: stable@vger.kernel.org
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2018-02-18 05:27:38 -08:00
Markus Elfring ef59a62afd pata_it821x: Delete an error message for a failed memory allocation in it821x_firmware_command() 
Omit an extra message for a memory allocation failure in this function.

This issue was detected by using the Coccinelle software.

Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2018-02-18 05:26:07 -08:00
Markus Elfring 3e342770a2 pata_macio: Delete an error message for a failed memory allocation in two functions 
Omit an extra message for a memory allocation failure in these functions.

This issue was detected by using the Coccinelle software.

Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2018-02-18 05:24:16 -08:00
Markus Elfring 533013d69b pata_mpc52xx: Delete an error message for a failed memory allocation in mpc52xx_ata_probe() 
Omit an extra message for a memory allocation failure in this function.

This issue was detected by using the Coccinelle software.

Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2018-02-18 05:23:25 -08:00
Markus Elfring 2c7d759820 sata_dwc_460ex: Delete an error message for a failed memory allocation in sata_dwc_port_start() 
Omit an extra message for a memory allocation failure in this function.

This issue was detected by using the Coccinelle software.

Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Acked-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2018-02-18 05:21:31 -08:00
Markus Elfring b02b54914b pata_samsung_cf: Delete an error message for a failed memory allocation in pata_s3c_probe() 
Omit an extra message for a memory allocation failure in this function.

This issue was detected by using the Coccinelle software.

Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2018-02-18 05:20:38 -08:00
Markus Elfring 27c4203a3d pata_arasan_cf: Delete an unnecessary variable initialisation in arasan_cf_probe() 
The local variable "ret" will eventually be set to an appropriate value
a bit later. Thus omit the explicit initialisation at the beginning.

Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2018-02-18 05:16:35 -08:00
Markus Elfring dcf3c1c1e8 pata_arasan_cf: Delete an error message for a failed memory allocation in arasan_cf_probe() 
Omit an extra message for a memory allocation failure in this function.

This issue was detected by using the Coccinelle software.

Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2018-02-18 05:16:06 -08:00
Geert Uytterhoeven 8f8ca51dbb ata: sata_rcar: Remove unused variable in sata_rcar_init_controller() 
drivers/ata/sata_rcar.c: In function 'sata_rcar_init_controller':
drivers/ata/sata_rcar.c:821:8: warning: unused variable 'base' [-Wunused-variable]

Fixes: da77d76b95 ("sata_rcar: Reset SATA PHY when Salvator-X board resumes")
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2018-02-13 06:39:38 -08:00
Khiem Nguyen da77d76b95 sata_rcar: Reset SATA PHY when Salvator-X board resumes 
Because power of Salvator-X board is cut off in suspend,
it needs to reset SATA PHY state in resume.
Otherwise, SATA partition could not be accessed anymore.

Signed-off-by: Khiem Nguyen <khiem.nguyen.xt@rvc.renesas.com>
Signed-off-by: Hien Dang <hien.dang.eb@rvc.renesas.com>
[reinit phy in sata_rcar_resume() function on R-Car Gen3 only]
[factor out SATA module init sequence]
[fixed the prefix for the subject]
Signed-off-by: Yoshihiro Kaneko <ykaneko0929@gmail.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2018-02-12 09:22:36 -08:00
Eric Biggers 2c1ec6fda2 libata: don't try to pass through NCQ commands to non-NCQ devices 
syzkaller hit a WARN() in ata_bmdma_qc_issue() when writing to /dev/sg0.
This happened because it issued an ATA pass-through command (ATA_16)
where the protocol field indicated that NCQ should be used -- but the
device did not support NCQ.

We could just remove the WARN() from libata-sff.c, but the real problem
seems to be that the SCSI -> ATA translation code passes through NCQ
commands without verifying that the device actually supports NCQ.

Fix this by adding the appropriate check to ata_scsi_pass_thru().

Here's reproducer that works in QEMU when /dev/sg0 refers to a disk of
the default type ("82371SB PIIX3 IDE"):

    #include <fcntl.h>
    #include <unistd.h>

    int main()
    {
            char buf[53] = { 0 };

	    buf[36] = 0x85;		/* ATA_16 */
	    buf[37] = (12 << 1);	/* FPDMA */
	    buf[38] = 0x1;		/* Has data */
	    buf[51] = 0xC8;		/* ATA_CMD_READ */
            write(open("/dev/sg0", O_RDWR), buf, sizeof(buf));
    }

Fixes: ee7fb331c3 ("libata: add support for NCQ commands for SG interface")
Reported-by: syzbot+2f69ca28df61bdfc77cd36af2e789850355a221e@syzkaller.appspotmail.com
Cc: <stable@vger.kernel.org> # v4.4+
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2018-02-12 09:21:25 -08:00
Eric Biggers 9173e5e807 libata: remove WARN() for DMA or PIO command without data 
syzkaller hit a WARN() in ata_qc_issue() when writing to /dev/sg0.  This
happened because it issued a READ_6 command with no data buffer.

Just remove the WARN(), as it doesn't appear indicate a kernel bug.  The
expected behavior is to fail the command, which the code does.

Here's a reproducer that works in QEMU when /dev/sg0 refers to a disk of
the default type ("82371SB PIIX3 IDE"):

    #include <fcntl.h>
    #include <unistd.h>

    int main()
    {
            char buf[42] = { [36] = 0x8 /* READ_6 */ };

            write(open("/dev/sg0", O_RDWR), buf, sizeof(buf));
    }

Fixes: f92a26365a ("libata: change ATA_QCFLAG_DMAMAP semantics")
Reported-by: syzbot+f7b556d1766502a69d85071d2ff08bd87be53d0f@syzkaller.appspotmail.com
Cc: <stable@vger.kernel.org> # v2.6.25+
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2018-02-12 09:20:34 -08:00
Eric Biggers 058f58e235 libata: fix length validation of ATAPI-relayed SCSI commands 
syzkaller reported a crash in ata_bmdma_fill_sg() when writing to
/dev/sg1.  The immediate cause was that the ATA command's scatterlist
was not DMA-mapped, which causes 'pi - 1' to underflow, resulting in a
write to 'qc->ap->bmdma_prd[0xffffffff]'.

Strangely though, the flag ATA_QCFLAG_DMAMAP was set in qc->flags.  The
root cause is that when __ata_scsi_queuecmd() is preparing to relay a
SCSI command to an ATAPI device, it doesn't correctly validate the CDB
length before copying it into the 16-byte buffer 'cdb' in 'struct
ata_queued_cmd'.  Namely, it validates the fixed CDB length expected
based on the SCSI opcode but not the actual CDB length, which can be
larger due to the use of the SG_NEXT_CMD_LEN ioctl.  Since 'flags' is
the next member in ata_queued_cmd, a buffer overflow corrupts it.

Fix it by requiring that the actual CDB length be <= 16 (ATAPI_CDB_LEN).

[Really it seems the length should be required to be <= dev->cdb_len,
but the current behavior seems to have been intentionally introduced by
commit 607126c2a2 ("libata-scsi: be tolerant of 12-byte ATAPI commands
in 16-byte CDBs") to work around a userspace bug in mplayer.  Probably
the workaround is no longer needed (mplayer was fixed in 2007), but
continuing to allow lengths to up 16 appears harmless for now.]

Here's a reproducer that works in QEMU when /dev/sg1 refers to the
CD-ROM drive that qemu-system-x86_64 creates by default:

    #include <fcntl.h>
    #include <sys/ioctl.h>
    #include <unistd.h>

    #define SG_NEXT_CMD_LEN 0x2283

    int main()
    {
	    char buf[53] = { [36] = 0x7e, [52] = 0x02 };
	    int fd = open("/dev/sg1", O_RDWR);
	    ioctl(fd, SG_NEXT_CMD_LEN, &(int){ 17 });
	    write(fd, buf, sizeof(buf));
    }

The crash was:

    BUG: unable to handle kernel paging request at ffff8cb97db37ffc
    IP: ata_bmdma_fill_sg drivers/ata/libata-sff.c:2623 [inline]
    IP: ata_bmdma_qc_prep+0xa4/0xc0 drivers/ata/libata-sff.c:2727
    PGD fb6c067 P4D fb6c067 PUD 0
    Oops: 0002 [#1] SMP
    CPU: 1 PID: 150 Comm: syz_ata_bmdma_q Not tainted 4.15.0-next-20180202 #99
    Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.11.0-20171110_100015-anatol 04/01/2014
    [...]
    Call Trace:
     ata_qc_issue+0x100/0x1d0 drivers/ata/libata-core.c:5421
     ata_scsi_translate+0xc9/0x1a0 drivers/ata/libata-scsi.c:2024
     __ata_scsi_queuecmd drivers/ata/libata-scsi.c:4326 [inline]
     ata_scsi_queuecmd+0x8c/0x210 drivers/ata/libata-scsi.c:4375
     scsi_dispatch_cmd+0xa2/0xe0 drivers/scsi/scsi_lib.c:1727
     scsi_request_fn+0x24c/0x530 drivers/scsi/scsi_lib.c:1865
     __blk_run_queue_uncond block/blk-core.c:412 [inline]
     __blk_run_queue+0x3a/0x60 block/blk-core.c:432
     blk_execute_rq_nowait+0x93/0xc0 block/blk-exec.c:78
     sg_common_write.isra.7+0x272/0x5a0 drivers/scsi/sg.c:806
     sg_write+0x1ef/0x340 drivers/scsi/sg.c:677
     __vfs_write+0x31/0x160 fs/read_write.c:480
     vfs_write+0xa7/0x160 fs/read_write.c:544
     SYSC_write fs/read_write.c:589 [inline]
     SyS_write+0x4d/0xc0 fs/read_write.c:581
     do_syscall_64+0x5e/0x110 arch/x86/entry/common.c:287
     entry_SYSCALL_64_after_hwframe+0x21/0x86

Fixes: 607126c2a2 ("libata-scsi: be tolerant of 12-byte ATAPI commands in 16-byte CDBs")
Reported-by: syzbot+1ff6f9fcc3c35f1c72a95e26528c8e7e3276e4da@syzkaller.appspotmail.com
Cc: <stable@vger.kernel.org> # v2.6.24+
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2018-02-12 09:19:44 -08:00
Baruch Siach 9f2b51db5b ata: libahci: fix comment indentation 
Indent the numbered item with one space like all other items in the same
list.

Signed-off-by: Baruch Siach <baruch@tkos.co.il>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2018-02-12 09:18:25 -08:00
Stefan Roese 3b61e5121d ahci: Add check for device presence (PCIe hot unplug) in ahci_stop_engine() 
Exit directly with ENODEV, if the AHCI controller is not available
anymore. Otherwise a delay of 500ms for each port is added to the remove
function while trying to issue a command on the non-existent controller.

Signed-off-by: Stefan Roese <sr@denx.de>
Cc: Tejun Heo <tj@kernel.org>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2018-02-12 09:17:23 -08:00
Dong Bo 0d3e45bc65 libata: Fix compile warning with ATA_DEBUG enabled 
This fixs the following comile warnings with ATA_DEBUG enabled,
which detected by Linaro GCC 5.2-2015.11:

  drivers/ata/libata-scsi.c: In function 'ata_scsi_dump_cdb':
  ./include/linux/kern_levels.h:5:18: warning: format '%d' expects
  argument of type 'int', but argument 6 has type 'u64 {aka long
   long unsigned int}' [-Wformat=]

tj: Patch hand-applied and description trimmed.

Signed-off-by: Dong Bo <dongbo4@huawei.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2018-02-12 08:58:08 -08:00
Linus Torvalds 105cf3c8c6 pci-v4.16-changes 
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Merge tag 'pci-v4.16-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci

Pull PCI updates from Bjorn Helgaas:

 - skip AER driver error recovery callbacks for correctable errors
   reported via ACPI APEI, as we already do for errors reported via the
   native path (Tyler Baicar)

 - fix DPC shared interrupt handling (Alex Williamson)

 - print full DPC interrupt number (Keith Busch)

 - enable DPC only if AER is available (Keith Busch)

 - simplify DPC code (Bjorn Helgaas)

 - calculate ASPM L1 substate parameter instead of hardcoding it (Bjorn
   Helgaas)

 - enable Latency Tolerance Reporting for ASPM L1 substates (Bjorn
   Helgaas)

 - move ASPM internal interfaces out of public header (Bjorn Helgaas)

 - allow hot-removal of VGA devices (Mika Westerberg)

 - speed up unplug and shutdown by assuming Thunderbolt controllers
   don't support Command Completed events (Lukas Wunner)

 - add AtomicOps support for GPU and Infiniband drivers (Felix Kuehling,
   Jay Cornwall)

 - expose "ari_enabled" in sysfs to help NIC naming (Stuart Hayes)

 - clean up PCI DMA interface usage (Christoph Hellwig)

 - remove PCI pool API (replaced with DMA pool) (Romain Perier)

 - deprecate pci_get_bus_and_slot(), which assumed PCI domain 0 (Sinan
   Kaya)

 - move DT PCI code from drivers/of/ to drivers/pci/ (Rob Herring)

 - add PCI-specific wrappers for dev_info(), etc (Frederick Lawler)

 - remove warnings on sysfs mmap failure (Bjorn Helgaas)

 - quiet ROM validation messages (Alex Deucher)

 - remove redundant memory alloc failure messages (Markus Elfring)

 - fill in types for compile-time VGA and other I/O port resources
   (Bjorn Helgaas)

 - make "pci=pcie_scan_all" work for Root Ports as well as Downstream
   Ports to help AmigaOne X1000 (Bjorn Helgaas)

 - add SPDX tags to all PCI files (Bjorn Helgaas)

 - quirk Marvell 9128 DMA aliases (Alex Williamson)

 - quirk broken INTx disable on Ceton InfiniTV4 (Bjorn Helgaas)

 - fix CONFIG_PCI=n build by adding dummy pci_irqd_intx_xlate() (Niklas
   Cassel)

 - use DMA API to get MSI address for DesignWare IP (Niklas Cassel)

 - fix endpoint-mode DMA mask configuration (Kishon Vijay Abraham I)

 - fix ARTPEC-6 incorrect IS_ERR() usage (Wei Yongjun)

 - add support for ARTPEC-7 SoC (Niklas Cassel)

 - add endpoint-mode support for ARTPEC (Niklas Cassel)

 - add Cadence PCIe host and endpoint controller driver (Cyrille
   Pitchen)

 - handle multiple INTx status bits being set in dra7xx (Vignesh R)

 - translate dra7xx hwirq range to fix INTD handling (Vignesh R)

 - remove deprecated Exynos PHY initialization code (Jaehoon Chung)

 - fix MSI erratum workaround for HiSilicon Hip06/Hip07 (Dongdong Liu)

 - fix NULL pointer dereference in iProc BCMA driver (Ray Jui)

 - fix Keystone interrupt-controller-node lookup (Johan Hovold)

 - constify qcom driver structures (Julia Lawall)

 - rework Tegra config space mapping to increase space available for
   endpoints (Vidya Sagar)

 - simplify Tegra driver by using bus->sysdata (Manikanta Maddireddy)

 - remove PCI_REASSIGN_ALL_BUS usage on Tegra (Manikanta Maddireddy)

 - add support for Global Fabric Manager Server (GFMS) event to
   Microsemi Switchtec switch driver (Logan Gunthorpe)

 - add IDs for Switchtec PSX 24xG3 and PSX 48xG3 (Kelvin Cao)

* tag 'pci-v4.16-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci: (140 commits)
  PCI: cadence: Add EndPoint Controller driver for Cadence PCIe controller
  dt-bindings: PCI: cadence: Add DT bindings for Cadence PCIe endpoint controller
  PCI: endpoint: Fix EPF device name to support multi-function devices
  PCI: endpoint: Add the function number as argument to EPC ops
  PCI: cadence: Add host driver for Cadence PCIe controller
  dt-bindings: PCI: cadence: Add DT bindings for Cadence PCIe host controller
  PCI: Add vendor ID for Cadence
  PCI: Add generic function to probe PCI host controllers
  PCI: generic: fix missing call of pci_free_resource_list()
  PCI: OF: Add generic function to parse and allocate PCI resources
  PCI: Regroup all PCI related entries into drivers/pci/Makefile
  PCI/DPC: Reformat DPC register definitions
  PCI/DPC: Add and use DPC Status register field definitions
  PCI/DPC: Squash dpc_rp_pio_get_info() into dpc_process_rp_pio_error()
  PCI/DPC: Remove unnecessary RP PIO register structs
  PCI/DPC: Push dpc->rp_pio_status assignment into dpc_rp_pio_get_info()
  PCI/DPC: Squash dpc_rp_pio_print_error() into dpc_rp_pio_get_info()
  PCI/DPC: Make RP PIO log size check more generic
  PCI/DPC: Rename local "status" to "dpc_status"
  PCI/DPC: Squash dpc_rp_pio_print_tlp_header() into dpc_rp_pio_print_error()
  ...
 2018-02-06 09:59:40 -08:00
Linus Torvalds 76a250f9a5 Merge branch 'for-4.16' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/libata 
Pull libata updates from Tejun Heo:
 "Nothing too interesting. Several patches to convert mdelay() to
  usleep_range(), removal of unused pata_at32, and other low level
  driver specific changes"

* 'for-4.16' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/libata:
  ata: pata_pdc2027x: Replace mdelay with msleep
  ata: pata_it821x: Replace mdelay with usleep_range in it821x_firmware_command
  ata: sata_mv: Replace mdelay with usleep_range in mv_reset_channel
  ata: remove pata_at32
  phy: brcm-sata: remove unused variable
  phy: brcm-sata: fix semicolon.cocci warnings
  ata: ahci_brcm: Recover from failures to identify devices
  phy: brcm-sata: Implement calibrate callback
  ahci: Add Intel Cannon Lake PCH-H PCI ID
  ata_piix: constify pci_bits
  libata:pata_atiixp: Don't use unconnected secondary port on SB600
  ata: ahci_brcm: Avoid clobbering SATA_TOP_CTRL_BUS_CTRL
  ahci: Allow setting a default LPM policy for mobile chipsets
  ahci: Add PCI ids for Intel Bay Trail, Cherry Trail and Apollo Lake AHCI
  ahci: Annotate PCI ids for mobile Intel chipsets as such
 2018-01-30 14:48:30 -08:00
Jia-Ju Bai b3506c7ed2 ata: pata_pdc2027x: Replace mdelay with msleep 
After checking all possible call chains to pdc_adjust_pll and
pdc_detect_pll_input_clock,
my tool finds that these functions are never called in atomic context,
namely never in an interrupt handler or holding a spinlock.
And their caller functions pdc2027x_init_one and pdc2027x_reinit_one
calls pci_enable_device which can sleep, and no spinlock is held when
calling pdc_adjust_pll and pdc_detect_pll_input_clock,
so it proves that pdc_adjust_pll and pdc_detect_pll_input_clock
can call functions which can sleep.
Thus mdelay can be replaced with msleep to avoid busy wait.

Signed-off-by: Jia-Ju Bai <baijiaju1990@gmail.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2018-01-25 07:28:31 -08:00
Jia-Ju Bai eada8598e6 ata: pata_it821x: Replace mdelay with usleep_range in it821x_firmware_command 
After checking all possible call chains to it821x_firmware_command here,
my tool finds that it821x_firmware_command
is never called in atomic context,
namely never in an interrupt handler or holding a spinlock.
And it821x_firmware_command calls kmalloc(GFP_KERNEL),
so it proves again that it821x_firmware_command
can call functions which can sleep.
Thus mdelay can be replaced with usleep_range to avoid busy wait.

This is found by a static analysis tool named DCNS written by myself.

Signed-off-by: Jia-Ju Bai <baijiaju1990@gmail.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2018-01-25 07:28:23 -08:00
Jia-Ju Bai e72685dbd2 ata: sata_mv: Replace mdelay with usleep_range in mv_reset_channel 
After checking all possible call chains to mv_reset_channel here,
my tool finds that mv_reset_channel is never called in atomic context,
namely never in an interrupt handler or holding a spinlock.
Thus mdelay can be replaced with usleep_range to avoid busy wait.

This is found by a static analysis tool named DCNS written by myself.

Signed-off-by: Jia-Ju Bai <baijiaju1990@gmail.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2018-01-25 07:28:13 -08:00
Corentin Labbe 6590425218 ata: remove pata_at32 
Since AVR32 was removed, pata_at32 is unselectable/uncompilable.
Remove this driver.

Signed-off-by: Corentin Labbe <clabbe.montjoie@gmail.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2018-01-18 13:17:25 -08:00
Florian Fainelli eb73390ae2 ata: ahci_brcm: Recover from failures to identify devices 
When powering up, the SATA controller may fail to mount the HDD. The SATA
controller will lock up, preventing it from negotiating to a lower speed or
transmitting data. Root cause is power supply noise creating resonance at 6 Ghz
and 3 GHz frequencies, which causes instability in the Clock-Data Recovery
(CDR) frontend module, resulting in false acquisition of the clock at SATA
6G/3G speeds.

The SATA controller may fail to mount the HDD and lock up, requiring a power
cycle. Broadcom chips suspected of being susceptible to this issue include
BCM7445, BCM7439, and BCM7366.

The Kernel implements an error recovery mechanism that resets the SATA PHY and
digital controller when the controller locks up. During this error recovery
process, typically there is less activity on the board and Broadcom STB chip,
so that the power supply is less noisy, thus allowing the SATA controller to
lock correctly.

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2018-01-17 07:52:29 -08:00
Sinan Kaya 78a6b8d870 ata: Deprecate pci_get_bus_and_slot() 
pci_get_bus_and_slot() is restrictive such that it assumes domain=0 as
where a PCI device is present. This restricts the device drivers to be
reused for other domain numbers.

Getting ready to remove pci_get_bus_and_slot() function in favor of
pci_get_domain_bus_and_slot().

Use pci_get_domain_bus_and_slot() and extract the actual domain number
from the pdev passed in.

Signed-off-by: Sinan Kaya <okaya@codeaurora.org>
Signed-off-by: Bjorn Helgaas <helgaas@kernel.org>
Acked-by: Tejun Heo <tj@kernel.org>
 2018-01-11 17:23:23 -06:00
Mika Westerberg f919dde077 ahci: Add Intel Cannon Lake PCH-H PCI ID 
Add Intel Cannon Lake PCH-H PCI ID to the list of supported controllers.

Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: stable@vger.kernel.org
 2018-01-11 10:09:47 -08:00
Arvind Yadav 494fd076ea ata_piix: constify pci_bits 
pci_bits are not supposed to change at runtime. Functions
pci_test_config_bits() working with const 'struct pci_bits'.
So mark the non-const structs as const.

Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2018-01-08 06:15:41 -08:00
Darren Stevens e47ecd4e48 libata:pata_atiixp: Don't use unconnected secondary port on SB600 
The AMD SB600 southbridge has an PATA IDE interface, but the
    secondary port has no physical connections, so is disabled in
    the PCI header which makes it appear as a legacy port.

    On most systems this causes no trouble, but the Amigaone X1000 has
    an SB600 connected to a PowerPC SoC PCI-e root port, with an
    emulated ISA bus. On this system a kernel panic occurs at boot
    time during device attach for the secondary port.

    Mark the port as 'dummy' to prevent this. As a bonus, disabling
    this will slightly speed up booting on PC systems using an
    SB600 as they will now skip 2 known empty ports.

    Signed-off-by: Darren Stevens <Darren@stevens-zone.net>

Signed-off-by: Tejun Heo <tj@kernel.org>
 2018-01-08 04:02:02 -08:00
Florian Fainelli 36fffd6a1f ata: ahci_brcm: Avoid clobbering SATA_TOP_CTRL_BUS_CTRL 
We are doing a blind write to SATA_TOP_CTRL_BUS_CTRL to set the system
endian, but in doing so, we are also overwriting other bits, such as the
SATA_SCB_BURST_SIZE and SATA_FIFO_SIZE bits, which impact performance.
Do a read/modify/write so we keep the default values.

While we are at it, we also greatly simplify the logic and just leave
the NSP specific bit settings, instead of having a completely different
sequence.

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2018-01-02 08:38:29 -08:00
Xinyu Lin db5ff90979 libata: apply MAX_SEC_1024 to all LITEON EP1 series devices 
LITEON EP1 has the same timeout issues as CX1 series devices.

Revert max_sectors to the value of 1024.

'e0edc8c54646 ("libata: apply MAX_SEC_1024 to all CX1-JB*-HP devices")'

Signed-off-by: Xinyu Lin <xinyu0123@gmail.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: stable@vger.kernel.org
 2017-12-19 05:30:38 -08:00
Hans de Goede ebb82e3c79 ahci: Allow setting a default LPM policy for mobile chipsets 
On many laptops setting a different LPM policy then unknown /
max_performance can lead to power-savings of 1.0 - 1.5 Watts (when idle).

Modern ultrabooks idle around 6W (at 50% screen brightness), 1.0 - 1.5W
is a significant chunk of this.

There are some performance / latency costs to enabling LPM by default,
so it is desirable to make it possible to set a different LPM policy
for mobile / laptop variants of chipsets / "South Bridges" vs their
desktop / server counterparts. Also enabling LPM by default is not
entirely without risk of regressions. At least min_power is known to
cause issues with some disks, including some reports of data corruption.

This commits adds a new ahci.mobile_lpm_policy kernel cmdline option,
which defaults to a new SATA_MOBILE_LPM_POLICY Kconfig option so that
Linux distributions can choose to set a LPM policy for mobile chipsets
by default.

The reason to have both a kernel cmdline option and a Kconfig default
value for it, is to allow easy overriding of the default to allow
trouble-shooting without needing to rebuild the kernel.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2017-12-11 08:53:33 -08:00
Hans de Goede 998008b779 ahci: Add PCI ids for Intel Bay Trail, Cherry Trail and Apollo Lake AHCI 
Add PCI ids for Intel Bay Trail, Cherry Trail and Apollo Lake AHCI
SATA controllers. This commit is a preparation patch for allowing a
different default sata link powermanagement policy for mobile chipsets.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2017-12-11 06:40:55 -08:00
Hans de Goede ca1b4974bd ahci: Annotate PCI ids for mobile Intel chipsets as such 
Intel uses different SATA PCI ids for the Desktop and Mobile SKUs of their
chipsets. For older models the comment describing which chipset the PCI id
is for, aksi indicates when we're dealing with a mobile SKU. Extend the
comments for recent chipsets to also indicate mobile SKUs.

The information this commit adds comes from Intel's chipset datasheets.

This commit is a preparation patch for allowing a different default
sata link powermanagement policy for mobile chipsets.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2017-12-11 06:39:59 -08:00
David Milburn 2dc0b46b5e libata: sata_down_spd_limit should return if driver has not recorded sstatus speed 
During hotplug, it is possible for 6Gbps link speed to be limited all
the way down to 1.5 Gbps which may lead to a slower link speed when
drive is re-connected.

This behavior has been seen on a Intel Lewisburg SATA controller
(8086:a1d2) with HGST HUH728080ALE600 drive where SATA link speed was
limited to 1.5 Gbps and when re-connected the link came up 3.0 Gbps.

This patch was retested on above configuration and showed the
hotplugged link to come back online at max speed (6Gbps). I did not
see the downgrade when testing on Intel C600/X79, but retested patched
linux-4.14-rc5 kernel and didn't see any side effects from this
change. Also, successfully retested hotplug on port multiplier 3Gbps
link.

tj: Minor comment updates.

Signed-off-by: David Milburn <dmilburn@redhat.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2017-12-04 13:57:03 -08:00
Matthias Brugger 2467c0451c ahci: mtk: Change driver name to ahci-mtk 
The driver name "ahci" is already used by the ahci platform driver.
This leads to the following error:
Error: Driver 'ahci' is already registered, aborting...

Change the name to ahci-mtk to fix this.

Signed-off-by: Matthias Brugger <mbrugger@suse.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2017-12-04 12:35:29 -08:00
Yuantian Tang ce179cbded ahci: qoriq: refine port register configuration 
These PP2C and PP3C registers control the configuration of the PHY
control OOB timing for the COMINIT/COMWAKE parameters respectively
for sata port. Overwrite default values with calculated ones to get
better OOB timing.

Signed-off-by: Tang Yuantian <andy.tang@nxp.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2017-12-04 12:18:08 -08:00
Arvind Yadav 20f9ceed72 pata_pdc2027x : make pdc2027x_*_timing structures const 
Make these pdc2027x_*_timing structures const as it is never modified.

Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2017-11-27 11:46:26 -08:00
Arvind Yadav c1da86c19a pata_pdc2027x: Remove unnecessary error check 
Here, The function pdc_hardware_init always return zero. So it is not
necessary to check its return value.

Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2017-11-27 11:46:26 -08:00
Albert Pool 16a27dfd21 ata: mediatek: Fix typo in module description 
Signed-off-by: Albert Pool <albertpool@solcon.nl>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2017-11-27 11:26:59 -08:00
Linus Torvalds 1bc03573e1 Merge branch 'for-4.15' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/libata 
Pull libata updates from Tejun Heo:
 "Nothing too interesting or alarming. Other than a new power saving
  mode addition to ahci and crash fix on a tracepoint, all changes are
  trivial or device-specific"

* 'for-4.15' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/libata: (22 commits)
  ahci: imx: Handle increased read failures for IMX53 temperature sensor in low frequency mode.
  ata: sata_dwc_460ex: Propagate platform device ID to DMA driver
  ata: fixes kernel crash while tracing ata_eh_link_autopsy event
  ata: pata_pdc2027x: Fix space before '[' error.
  libata: fix spelling mistake: 'ambigious' -> 'ambiguous'
  ata: ceva: Add SMMU support for SATA IP
  ata: ceva: Correct the suspend and resume logic for SATA
  ata: ceva: Correct the AXI bus configuration for SATA ports
  ata: ceva: Add CCI support for SATA if CCI is enabled
  ata: ceva: Make RxWaterMark value as module parameter
  ata: ceva: Disable Device Sleep capability
  ata: ceva: Add gen 3 mode support in driver
  ata: ceva: Move sata port phy oob settings to device-tree
  devicetree: bindings: Add sata port phy config parameters in ahci-ceva
  ata: mark expected switch fall-throughs
  ata: sata_mv: remove a redundant assignment to pointer ehi
  ahci: Add support for Cavium's fifth generation SATA controller
  ata: sata_rcar: Use of_device_get_match_data() helper
  libata: make ata_port_type const
  libata: make static arrays const, reduces object code size
  ...
 2017-11-15 14:11:41 -08:00
Linus Torvalds 2bcc673101 Merge branch 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 
Pull timer updates from Thomas Gleixner:
 "Yet another big pile of changes:

   - More year 2038 work from Arnd slowly reaching the point where we
     need to think about the syscalls themself.

   - A new timer function which allows to conditionally (re)arm a timer
     only when it's either not running or the new expiry time is sooner
     than the armed expiry time. This allows to use a single timer for
     multiple timeout requirements w/o caring about the first expiry
     time at the call site.

   - A new NMI safe accessor to clock real time for the printk timestamp
     work. Can be used by tracing, perf as well if required.

   - A large number of timer setup conversions from Kees which got
     collected here because either maintainers requested so or they
     simply got ignored. As Kees pointed out already there are a few
     trivial merge conflicts and some redundant commits which was
     unavoidable due to the size of this conversion effort.

   - Avoid a redundant iteration in the timer wheel softirq processing.

   - Provide a mechanism to treat RTC implementations depending on their
     hardware properties, i.e. don't inflict the write at the 0.5
     seconds boundary which originates from the PC CMOS RTC to all RTCs.
     No functional change as drivers need to be updated separately.

   - The usual small updates to core code clocksource drivers. Nothing
     really exciting"

* 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (111 commits)
  timers: Add a function to start/reduce a timer
  pstore: Use ktime_get_real_fast_ns() instead of __getnstimeofday()
  timer: Prepare to change all DEFINE_TIMER() callbacks
  netfilter: ipvs: Convert timers to use timer_setup()
  scsi: qla2xxx: Convert timers to use timer_setup()
  block/aoe: discover_timer: Convert timers to use timer_setup()
  ide: Convert timers to use timer_setup()
  drbd: Convert timers to use timer_setup()
  mailbox: Convert timers to use timer_setup()
  crypto: Convert timers to use timer_setup()
  drivers/pcmcia: omap1: Fix error in automated timer conversion
  ARM: footbridge: Fix typo in timer conversion
  drivers/sgi-xp: Convert timers to use timer_setup()
  drivers/pcmcia: Convert timers to use timer_setup()
  drivers/memstick: Convert timers to use timer_setup()
  drivers/macintosh: Convert timers to use timer_setup()
  hwrng/xgene-rng: Convert timers to use timer_setup()
  auxdisplay: Convert timers to use timer_setup()
  sparc/led: Convert timers to use timer_setup()
  mips: ip22/32: Convert timers to use timer_setup()
  ...
 2017-11-13 17:56:58 -08:00
Egor Starkov 5bca462d2d ahci: imx: Handle increased read failures for IMX53 temperature sensor in low frequency mode. 
Extended testing has shown that the imx ahci driver sometimes requires
more than the 100 attempts currently alotted in the driver to perform a
successful temperature reading when running at minimum (throttled) CPU
frequency.

Debugging suggests that the read cycle can take 160 attempts (which given
that the driver averages 80 readings from the ADC equates to one failure
on each read).

Increase the attempt limit to 200 in order to greatly reduce the
likelihood of the driver failing to perform a temperature reading,
especially at low CPU frequency.

Signed-off-by: Egor Starkov <egor.starkov@ge.com>
Signed-off-by: Martyn Welch <martyn.welch@collabora.co.uk>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2017-11-13 12:17:43 -08:00
Andy Shevchenko 47e46613d8 ata: sata_dwc_460ex: Propagate platform device ID to DMA driver 
Propagate platform device ID to DMA driver to distinguish relationship
between DMA and SATA instances.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2017-11-13 12:17:11 -08:00
Rameshwar Prasad Sahu f1601113dd ata: fixes kernel crash while tracing ata_eh_link_autopsy event 
When tracing ata link error event, the kernel crashes when the disk is
removed due to NULL pointer access by trace_ata_eh_link_autopsy API.
This occurs as the dev is NULL when the disk disappeared. This patch
fixes this crash by calling trace_ata_eh_link_autopsy only if "dev"
is not NULL.

v2 changes:
 Removed direct passing "link" pointer instead of "dev" in trace API.

Signed-off-by: Rameshwar Prasad Sahu <rsahu@apm.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Fixes: 255c03d15a ("libata: Add tracepoints")
Cc: stable@vger.kernel.org # v4.1+
 2017-11-03 06:23:06 -07:00
Greg Kroah-Hartman b24413180f License cleanup: add SPDX GPL-2.0 license identifier to files with no license 
Many source files in the tree are missing licensing information, which
makes it harder for compliance tools to determine the correct license.

By default all files without license information are under the default
license of the kernel, which is GPL version 2.

Update the files which contain no license information with the 'GPL-2.0'
SPDX license identifier.  The SPDX identifier is a legally binding
shorthand, which can be used instead of the full boiler plate text.

This patch is based on work done by Thomas Gleixner and Kate Stewart and
Philippe Ombredanne.

How this work was done:

Patches were generated and checked against linux-4.14-rc6 for a subset of
the use cases:
 - file had no licensing information it it.
 - file was a */uapi/* one with no licensing information in it,
 - file was a */uapi/* one with existing licensing information,

Further patches will be generated in subsequent months to fix up cases
where non-standard license headers were used, and references to license
had to be inferred by heuristics based on keywords.

The analysis to determine which SPDX License Identifier to be applied to
a file was done in a spreadsheet of side by side results from of the
output of two independent scanners (ScanCode & Windriver) producing SPDX
tag:value files created by Philippe Ombredanne.  Philippe prepared the
base worksheet, and did an initial spot review of a few 1000 files.

The 4.13 kernel was the starting point of the analysis with 60,537 files
assessed.  Kate Stewart did a file by file comparison of the scanner
results in the spreadsheet to determine which SPDX license identifier(s)
to be applied to the file. She confirmed any determination that was not
immediately clear with lawyers working with the Linux Foundation.

Criteria used to select files for SPDX license identifier tagging was:
 - Files considered eligible had to be source code files.
 - Make and config files were included as candidates if they contained >5
   lines of source
 - File already had some variant of a license header in it (even if <5
   lines).

All documentation files were explicitly excluded.

The following heuristics were used to determine which SPDX license
identifiers to apply.

 - when both scanners couldn't find any license traces, file was
   considered to have no license information in it, and the top level
   COPYING file license applied.

   For non */uapi/* files that summary was:

   SPDX license identifier                            # files
   ---------------------------------------------------|-------
   GPL-2.0                                              11139

   and resulted in the first patch in this series.

   If that file was a */uapi/* path one, it was "GPL-2.0 WITH
   Linux-syscall-note" otherwise it was "GPL-2.0".  Results of that was:

   SPDX license identifier                            # files
   ---------------------------------------------------|-------
   GPL-2.0 WITH Linux-syscall-note                        930

   and resulted in the second patch in this series.

 - if a file had some form of licensing information in it, and was one
   of the */uapi/* ones, it was denoted with the Linux-syscall-note if
   any GPL family license was found in the file or had no licensing in
   it (per prior point).  Results summary:

   SPDX license identifier                            # files
   ---------------------------------------------------|------
   GPL-2.0 WITH Linux-syscall-note                       270
   GPL-2.0+ WITH Linux-syscall-note                      169
   ((GPL-2.0 WITH Linux-syscall-note) OR BSD-2-Clause)    21
   ((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause)    17
   LGPL-2.1+ WITH Linux-syscall-note                      15
   GPL-1.0+ WITH Linux-syscall-note                       14
   ((GPL-2.0+ WITH Linux-syscall-note) OR BSD-3-Clause)    5
   LGPL-2.0+ WITH Linux-syscall-note                       4
   LGPL-2.1 WITH Linux-syscall-note                        3
   ((GPL-2.0 WITH Linux-syscall-note) OR MIT)              3
   ((GPL-2.0 WITH Linux-syscall-note) AND MIT)             1

   and that resulted in the third patch in this series.

 - when the two scanners agreed on the detected license(s), that became
   the concluded license(s).

 - when there was disagreement between the two scanners (one detected a
   license but the other didn't, or they both detected different
   licenses) a manual inspection of the file occurred.

 - In most cases a manual inspection of the information in the file
   resulted in a clear resolution of the license that should apply (and
   which scanner probably needed to revisit its heuristics).

 - When it was not immediately clear, the license identifier was
   confirmed with lawyers working with the Linux Foundation.

 - If there was any question as to the appropriate license identifier,
   the file was flagged for further research and to be revisited later
   in time.

In total, over 70 hours of logged manual review was done on the
spreadsheet to determine the SPDX license identifiers to apply to the
source files by Kate, Philippe, Thomas and, in some cases, confirmation
by lawyers working with the Linux Foundation.

Kate also obtained a third independent scan of the 4.13 code base from
FOSSology, and compared selected files where the other two scanners
disagreed against that SPDX file, to see if there was new insights.  The
Windriver scanner is based on an older version of FOSSology in part, so
they are related.

Thomas did random spot checks in about 500 files from the spreadsheets
for the uapi headers and agreed with SPDX license identifier in the
files he inspected. For the non-uapi files Thomas did random spot checks
in about 15000 files.

In initial set of patches against 4.14-rc6, 3 files were found to have
copy/paste license identifier errors, and have been fixed to reflect the
correct identifier.

Additionally Philippe spent 10 hours this week doing a detailed manual
inspection and review of the 12,461 patched files from the initial patch
version early this week with:
 - a full scancode scan run, collecting the matched texts, detected
   license ids and scores
 - reviewing anything where there was a license detected (about 500+
   files) to ensure that the applied SPDX license was correct
 - reviewing anything where there was no detection but the patch license
   was not GPL-2.0 WITH Linux-syscall-note to ensure that the applied
   SPDX license was correct

This produced a worksheet with 20 files needing minor correction.  This
worksheet was then exported into 3 different .csv files for the
different types of files to be modified.

These .csv files were then reviewed by Greg.  Thomas wrote a script to
parse the csv files and add the proper SPDX tag to the file, in the
format that the file expected.  This script was further refined by Greg
based on the output to detect more types of files automatically and to
distinguish between header and source .c files (which need different
comment types.)  Finally Greg ran the script using the .csv files to
generate the patches.

Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org>
Reviewed-by: Philippe Ombredanne <pombredanne@nexb.com>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
 2017-11-02 11:10:55 +01:00
Arvind Yadav e00b19e28c ata: pata_pdc2027x: Fix space before '[' error. 
Fix checkpatch.pl error:
ERROR: space prohibited before open square bracket '['.

Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2017-10-30 09:19:06 -07:00
Arvind Yadav 9de55351ee libata: fix spelling mistake: 'ambigious' -> 'ambiguous' 
Trivial fix to spelling mistakes in ata_parse_force_one().

Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2017-10-30 08:07:14 -07:00
Anurag Kumar Vulisha f0a559aae5 ata: ceva: Add SMMU support for SATA IP 
AXI master interface in CEVA AHCI controller requires two unique
Write/Read ID tags per port. This is because, ahci controller uses
different AXI ID[3:0] bits for identifying non-data transfers(like
reading descriptors, updating PRD tables, etc) and data transfers
(like sending/receiving FIS).To make SMMU work with SATA we need to
add correct SMMU stream id for SATA. SMMU stream id for SATA is
determined based on the AXI ID[1:0] as shown below

	SATA SMMU ID =  <TBU number>, 0011, 00, 00, AXI ID[1:0]
	Note: SATA in  ZynqMp uses TBU1 so TBU number = 0x1, so
	      SMMU ID = 001, 0011, 00, 00, AXI ID[1:0]

Since we have four different AXI ID[3:0] (2 for port0 & 2 for port1
as said above) we get four different SMMU stream id's combinations
for SATA. These AXI ID can be configured using PAXIC register.
In this patch we assumed the below AXI ID values

 Read ID/ Write ID for Non-Data Port0 transfers = 0
 Read ID/ Write ID for Data Port0 transfers = 1
 Read ID/ Write ID for Non-Data Port1 transfers = 2
 Read ID/ Write ID for Data Port1 transfers = 3

Based on the above values,SMMU stream ID's for SATA will be 0x4c0 &
0x4c1 for PORT0, 0x4c2 & 0x4c3 for PORT1. These values needed to be
added to iommus dts property. This patch does the same.

Signed-off-by: Anurag Kumar Vulisha <anuragku@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2017-10-23 07:09:27 -07:00
Anurag Kumar Vulisha 26bf3b6658 ata: ceva: Correct the suspend and resume logic for SATA 
The present suspend code disables the port interrupts
and stops the HBA. On resume it enables the interrupts and HBA.
This works fine until the FPD power domain is not off.
If FPD is off then the ceva vendor specific configurations like
OOB, AXI settings are lost, they need to be re-programmed and
also since SERDES is also in FPD , SATA lane phy init needs to
be called again (which is not happening in the present sequence)
Because of this incorrect sequence SATA fails to work on resume.

This patch corrects the code to make Suspend & Resume work in normal
and FPD off cases.

Signed-off-by: Anurag Kumar Vulisha <anuragku@xilinx.com>
Reviewed-by: Shubhrajyoti Datta <shubhraj@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2017-10-23 07:09:27 -07:00
Anurag Kumar Vulisha 6e037fb770 ata: ceva: Correct the AXI bus configuration for SATA ports 
Previously PAXIC register was programmed before configuring PCFG
register. PCFG should be programmed with the address of the port
for which PAXIC should be configured for.
This was not happening before, so only one port PAXIC was written
correctly and the other port was having wrong value.
This patch moves the PXAIC register write after configuring PCFG,
doing so will correct the axi bus settings for sata port0 & port1.

Signed-off-by: Anurag Kumar Vulisha <anuragku@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2017-10-23 07:09:27 -07:00
Anurag Kumar Vulisha 3bc867de85 ata: ceva: Add CCI support for SATA if CCI is enabled 
This patch adds support for CCI in SATA controller if CCI is
enabled in design. This patch will add CCI settings for SATA
if "dma-coherent" dts property is added.

Signed-off-by: Anurag Kumar Vulisha <anuragku@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2017-10-23 07:09:26 -07:00
Anurag Kumar Vulisha 05e890d843 ata: ceva: Make RxWaterMark value as module parameter 
This patch updates the driver to make Rx Fifo water mark value
as a module parameter.

Signed-off-by: Anurag Kumar Vulisha <anuragku@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2017-10-23 07:09:26 -07:00
Anurag Kumar Vulisha ff0d63778c ata: ceva: Disable Device Sleep capability 
Since CEVA controller does not support Device Sleep capability,
we need to clear that feature by clearing the DEVSLP bit in word78
of IDENTIFY DEVICE data. This patch does the same.

Signed-off-by: Anurag Kumar Vulisha <anuragku@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2017-10-23 07:09:26 -07:00
Anurag Kumar Vulisha e8fc8b858c ata: ceva: Add gen 3 mode support in driver 
This patch sets gen 3 mode as default mode in ahci_ceva driver.

Signed-off-by: Anurag Kumar Vulisha <anuragku@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2017-10-23 07:09:26 -07:00
Anurag Kumar Vulisha fe8365bbf8 ata: ceva: Move sata port phy oob settings to device-tree 
In SATA Speed negotiation happens with  OOB(Out of Band) signals. These OOB
signal timing values are configured through vendor specific registers in the
SATA controller. These OOB timings depends on the generator and detector clock
frequency, which varies from board to board (ex: ep108 and zc1751 has different
clock frequencies).
To avoid maintaing these OOB settings in the driver, it is better to move these
settings to the device-tree node and read from the device-tree.

This patch does the same.

Signed-off-by: Anurag Kumar Vulisha <anuragku@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2017-10-23 07:09:26 -07:00
Gustavo A. R. Silva 05b8360599 ata: mark expected switch fall-throughs 
In preparation to enabling -Wimplicit-fallthrough, mark switch cases
where we are expecting to fall through.

In cases where a "drop through" comment was already in place, I replaced
it  with a proper "fall through" comment, which is what GCC is expecting
to find.

Signed-off-by: Gustavo A. R. Silva <garsilva@embeddedor.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2017-10-23 07:06:09 -07:00
Colin Ian King 14d7045c7f ata: sata_mv: remove a redundant assignment to pointer ehi 
The pointer ehi is being assigned to a value that is never read
and is redundant.  Clean up the code and move the ehi declaration
and initialization to the code block where it is used. Cleans up
clang warning: Value stored to 'ehi' is never read

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2017-10-23 07:05:56 -07:00
Kees Cook 1843594c56 ahci: Convert timers to use timer_setup() 
In preparation for unconditionally passing the struct timer_list pointer to
all timer callbacks, switch to using the new timer_setup() and from_timer()
to pass the timer pointer explicitly. Adds a pointer back to link
structure.

Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Tejun Heo <tj@kernel.org>
Cc: linux-ide@vger.kernel.org
Link: https://lkml.kernel.org/r/20171016215658.GA101965@beast
 2017-10-19 23:15:16 +02:00
Kees Cook b93ab338f7 libata: Convert timers to use timer_setup() 
In preparation for unconditionally passing the struct timer_list pointer to
all timer callbacks, switch to using the new timer_setup() and from_timer()
to pass the timer pointer explicitly.

Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Tejun Heo <tj@kernel.org>
Cc: linux-ide@vger.kernel.org
Link: https://lkml.kernel.org/r/20171005004842.GA23011@beast
 2017-10-17 17:37:37 +02:00
Radha Mohan Chintakuntla b1314e3f85 ahci: Add support for Cavium's fifth generation SATA controller 
This patch adds support for Cavium's fifth generation SATA controller.
It is an on-chip controller and complies with AHCI 1.3.1. As the
controller uses 64-bit addresses it cannot use the standard AHCI BAR5
and so uses BAR4.

Signed-off-by: Radha Mohan Chintakuntla <rchintakuntla@cavium.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2017-10-11 07:08:13 -07:00
Geert Uytterhoeven 03b623fbc5 ata: sata_rcar: Use of_device_get_match_data() helper 
Use the of_device_get_match_data() helper instead of open coding.
Note that the sata_rcar driver is used with DT only, so there's always a
valid match.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Acked-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2017-10-04 07:18:29 -07:00
Ard Biesheuvel d312fefea8 ahci: don't ignore result code of ahci_reset_controller() 
ahci_pci_reset_controller() calls ahci_reset_controller(), which may
fail, but ignores the result code and always returns success. This
may result in failures like below

  ahci 0000:02:00.0: version 3.0
  ahci 0000:02:00.0: enabling device (0000 -> 0003)
  ahci 0000:02:00.0: SSS flag set, parallel bus scan disabled
  ahci 0000:02:00.0: controller reset failed (0xffffffff)
  ahci 0000:02:00.0: failed to stop engine (-5)
    ... repeated many times ...
  ahci 0000:02:00.0: failed to stop engine (-5)
  Unable to handle kernel paging request at virtual address ffff0000093f9018
    ...
  PC is at ahci_stop_engine+0x5c/0xd8 [libahci]
  LR is at ahci_deinit_port.constprop.12+0x1c/0xc0 [libahci]
    ...
  [<ffff000000a17014>] ahci_stop_engine+0x5c/0xd8 [libahci]
  [<ffff000000a196b4>] ahci_deinit_port.constprop.12+0x1c/0xc0 [libahci]
  [<ffff000000a197d8>] ahci_init_controller+0x80/0x168 [libahci]
  [<ffff000000a260f8>] ahci_pci_init_controller+0x60/0x68 [ahci]
  [<ffff000000a26f94>] ahci_init_one+0x75c/0xd88 [ahci]
  [<ffff000008430324>] local_pci_probe+0x3c/0xb8
  [<ffff000008431728>] pci_device_probe+0x138/0x170
  [<ffff000008585e54>] driver_probe_device+0x2dc/0x458
  [<ffff0000085860e4>] __driver_attach+0x114/0x118
  [<ffff000008583ca8>] bus_for_each_dev+0x60/0xa0
  [<ffff000008585638>] driver_attach+0x20/0x28
  [<ffff0000085850b0>] bus_add_driver+0x1f0/0x2a8
  [<ffff000008586ae0>] driver_register+0x60/0xf8
  [<ffff00000842f9b4>] __pci_register_driver+0x3c/0x48
  [<ffff000000a3001c>] ahci_pci_driver_init+0x1c/0x1000 [ahci]
  [<ffff000008083918>] do_one_initcall+0x38/0x120

where an obvious hardware level failure results in an unnecessary 15 second
delay and a subsequent crash.

So record the result code of ahci_reset_controller() and relay it, rather
than ignoring it.

Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2017-10-02 12:21:30 -07:00
Bhumika Goyal 8df82c13a3 libata: make ata_port_type const 
Make this const as it is only stored in the const field of a device
structure. Make the declaration in header const too.

Structure found using Coccinelle and changes done by hand.

Signed-off-by: Bhumika Goyal <bhumirks@gmail.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2017-10-02 09:57:55 -07:00
Colin Ian King e94f7914fa libata: make static arrays const, reduces object code size 
Don't populate const arrayis on the stack, instead make them static.
Makes the object code smaller by over 260 bytes:

Before:
   text	   data	    bss	    dec	    hex	filename
  64864	   5948	   4128	  74940	  124bc	drivers/ata/libata-scsi.o

After:
   text	   data	    bss	    dec	    hex	filename
  64183	   6364	   4128	  74675	  123b3	drivers/ata/libata-scsi.o

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2017-09-19 11:53:11 -07:00
Ville Syrjälä 80a921e207 ata_piix: Add Fujitsu-Siemens Lifebook S6120 to short cable IDs 
Fujitsu-Siemens Lifebook S6120 misdetects the cable type for some
drives. The problematic one in this case is an mSATA SSD hooked up via a
mSATA->PATA bridge. With regular hard disks the detection seems to work
correctly.

Strangely an older Lifebook model (S6020) detects the cable as 80c
with the mSATA SSD, even if using the exact same flex cable.

Cc: Tejun Heo <tj@kernel.org>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2017-09-18 20:32:02 -07:00
Colin Ian King 01bb12e49b ata: pata_artop: remove redundant initialization of pio 
pio is initialized and the data is never read, instead it is almost
immediately being updated to a new value. Fix this by removing the
initialization.

Detected by scan-build:
"warning: Value stored to 'pio' during its initialization is never read"

Fixes: 669a5db411 ("[libata] Add a bunch of PATA drivers")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2017-09-18 20:24:21 -07:00
Hans de Goede f4ac647694 libata: Add new med_power_with_dipm link_power_management_policy setting 
As described by Matthew Garret quite a while back:
https://mjg59.dreamwidth.org/34868.html

Intel CPUs starting with the Haswell generation need SATA links to power
down for the "package" part of the CPU to reach low power-states like
PC7 / P8 which bring a significant power-saving with them.

The default max_performance lpm policy does not allow for these high
PC states, both the medium_power and min_power policies do allow this.

The min_power policy saves significantly more power, but there are some
reports of some disks / SSDs not liking min_power leading to system
crashes and in some cases even data corruption has been reported.

Matthew has found a document documenting the default settings of
Intel's IRST Windows driver with which most laptops ship:
https://www-ssl.intel.com/content/dam/doc/reference-guide/sata-devices-implementation-recommendations.pdf

Matthew wrote a patch changing med_power to match those defaults, but
that never got anywhere as some people where reporting issues with the
patch-set that patch was a part of.

This commit is another attempt to make the default IRST driver settings
available under Linux, but instead of changing medium_power and
potentially introducing regressions, this commit adds a new
med_power_with_dipm setting which is identical to the existing
medium_power accept that it enables dipm on top, which makes it match
the Windows IRST driver settings, which should hopefully be safe to
use on most devices.

The med_power_with_dipm setting is close to min_power, except that:
a) It does not use host-initiated slumber mode (ASP not set),
   but it does allow device-initiated slumber
b) It does not enable DevSlp mode

On my T440s test laptop I get the following power savings when idle:
medium_power		0.9W
med_power_with_dipm	1.2W
min_power		1.2W

Suggested-by: Matthew Garrett <mjg59@srcf.ucam.org>
Cc: Matthew Garrett <mjg59@srcf.ucam.org>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2017-09-18 20:22:04 -07:00
Arnd Bergmann 23e4c67ae1 ata: avoid gcc-7 warning in ata_timing_quantize 
gcc-7 warns about the result of a constant multiplication used as
a boolean:

drivers/ata/libata-core.c: In function 'ata_timing_quantize':
drivers/ata/libata-core.c:3164:30: warning: '*' in boolean context, suggest '&&' instead [-Wint-in-bool-context]

This slightly rearranges the macro to simplify the code and avoid
the warning at the same time.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2017-09-07 13:33:00 -07:00
Linus Torvalds 3b9f8ed25d Merge branch 'for-4.14' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/libata 
Pull libata updates from Tejun Heo:
 "Except for the ahci fix that fixes a boot issue, nothing major in this
  pull request. Some new platform controller support and device specific
  changes"

* 'for-4.14' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/libata:
  libata: zpodd: make arrays cdb static, reduces object code size
  ahci: don't use MSI for devices with the silly Intel NVMe remapping scheme
  dt-bindings: ata: add DT bindings for MediaTek SATA controller
  ata: mediatek: add support for MediaTek SATA controller
  pata_octeon_cf: use of_property_read_{bool|u32}()
  cs5536: add support for IDE controller variant
  ata: sata_gemini: Introduce explicit IDE pin control
  ata: sata_gemini: Retire custom pin control
  ata: ahci_platform: Add shutdown handler
  ata: sata_gemini: explicitly request exclusive reset control
  ata: Drop unnecessary static
  ata: Convert to using %pOF instead of full_name
 2017-09-06 22:41:21 -07:00
Colin Ian King 795ef78814 libata: zpodd: make arrays cdb static, reduces object code size 
Don't populate the arrays cdb on the stack, instead make them static.
Makes the object code smaller by 230 bytes:

Before:
   text	   data	    bss	    dec	    hex	filename
   3797	    240	      0	   4037	    fc5	drivers/ata/libata-zpodd.o

After:
   text	   data	    bss	    dec	    hex	filename
   3407	    400	      0	   3807	    edf	drivers/ata/libata-zpodd.o

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2017-09-06 07:40:28 -07:00
Christoph Hellwig f723fa4e69 ahci: don't use MSI for devices with the silly Intel NVMe remapping scheme 
Intel AHCI controllers that also hide NVMe devices in their bar
can't use MSI interrupts, so disable them.

Reported-by: John Loy <john.robert.loy@gmail.com>
Tested-by: John Loy <john.robert.loy@gmail.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Fixes: d684a90d38 ("ahci: per-port msix support")
Cc: stable@vger.kernel.org # v4.5+
Signed-off-by: Tejun Heo <tj@kernel.org>
 2017-09-06 07:36:23 -07:00
Linus Torvalds 0081a0ce80 Merge branch 'core-rcu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 
Pull RCU updates from Ingo Molnad:
 "The main RCU related changes in this cycle were:

   - Removal of spin_unlock_wait()
   - SRCU updates
   - RCU torture-test updates
   - RCU Documentation updates
   - Extend the sys_membarrier() ABI with the MEMBARRIER_CMD_PRIVATE_EXPEDITED variant
   - Miscellaneous RCU fixes
   - CPU-hotplug fixes"

* 'core-rcu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (63 commits)
  arch: Remove spin_unlock_wait() arch-specific definitions
  locking: Remove spin_unlock_wait() generic definitions
  drivers/ata: Replace spin_unlock_wait() with lock/unlock pair
  ipc: Replace spin_unlock_wait() with lock/unlock pair
  exit: Replace spin_unlock_wait() with lock/unlock pair
  completion: Replace spin_unlock_wait() with lock/unlock pair
  doc: Set down RCU's scheduling-clock-interrupt needs
  doc: No longer allowed to use rcu_dereference on non-pointers
  doc: Add RCU files to docbook-generation files
  doc: Update memory-barriers.txt for read-to-write dependencies
  doc: Update RCU documentation
  membarrier: Provide expedited private command
  rcu: Remove exports from rcu_idle_exit() and rcu_idle_enter()
  rcu: Add warning to rcu_idle_enter() for irqs enabled
  rcu: Make rcu_idle_enter() rely on callers disabling irqs
  rcu: Add assertions verifying blocked-tasks list
  rcu/tracing: Set disable_rcu_irq_enter on rcu_eqs_exit()
  rcu: Add TPS() protection for _rcu_barrier_trace strings
  rcu: Use idle versions of swait to make idle-hack clear
  swait: Add idle variants which don't contribute to load average
  ...
 2017-09-04 08:13:52 -07:00
Tejun Heo 2aca392398 Revert "libata: quirk read log on no-name M.2 SSD" 
This reverts commit 35f0b6a779.

We now conditionalize issuing of READ LOG PAGE on the TRUSTED
COMPUTING SUPPORTED bit in the identity data and this shouldn't be
necessary.

Signed-off-by: Tejun Heo <tj@kernel.org>
 2017-08-29 08:36:58 -07:00
Christoph Hellwig e8f11db956 libata: check for trusted computing in IDENTIFY DEVICE data 
ATA-8 and later mirrors the TRUSTED COMPUTING SUPPORTED bit in word 48 of
the IDENTIFY DEVICE data.  Check this before issuing a READ LOG PAGE
command to avoid issues with buggy devices.  The only downside is that
we can't support Security Send / Receive for a device with an older
revision due to the conflicting use of this field in earlier
specifications.

tj: The reason we need this is because some devices which don't
    support READ LOG PAGE lock up after getting issued that command.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Tested-by: David Ahern <dsahern@gmail.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2017-08-29 08:33:24 -07:00
Ryder Lee 47269605aa ata: mediatek: add support for MediaTek SATA controller 
This adds support the AHCI-compliant Serial ATA controller present
on MediaTek SoCs.

Signed-off-by: Ryder Lee <ryder.lee@mediatek.com>
Acked-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2017-08-28 10:54:42 -07:00
Sergei Shtylyov be1dc3fb29 pata_octeon_cf: use of_property_read_{bool|u32}() 
The Octeon CF driver basically  open-codes of_property_read_{bool|u32}()
using  of_{find|get}_property() calls in its  probe() method.  Using the
modern DT APIs saves 2 LoCs and 16 bytes of object code (MIPS gcc 3.4.3).

Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2017-08-28 10:44:24 -07:00
Christoph Hellwig 35f0b6a779 libata: quirk read log on no-name M.2 SSD 
Ido reported that reading the log page on his systems fails,
so quirk it as it won't support ZBC or security protocols.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reported-by: Ido Schimmel <idosch@mellanox.com>
Tested-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2017-08-28 10:27:16 -07:00
Ingo Molnar 94edf6f3c2 Merge branch 'for-mingo' of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu into core/rcu 
Pull RCU updates from Paul E. McKenney:

 - Removal of spin_unlock_wait()
 - SRCU updates
 - Torture-test updates
 - Documentation updates
 - Miscellaneous fixes
 - CPU-hotplug fixes
 - Miscellaneous non-RCU fixes

Signed-off-by: Ingo Molnar <mingo@kernel.org>
 2017-08-21 09:45:19 +02:00
Paul E. McKenney a4f08141d0 drivers/ata: Replace spin_unlock_wait() with lock/unlock pair 
There is no agreed-upon definition of spin_unlock_wait()'s semantics,
and it appears that all callers could do just as well with a lock/unlock
pair.  This commit therefore eliminates the spin_unlock_wait() call and
associated else-clause and hoists the then-clause's lock and unlock out of
the "if" statement.  This should be safe from a performance perspective
because according to Tejun there should be few if any drivers that don't
set their own error handler.

Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Acked-by: Tejun Heo <tj@kernel.org>
Cc: <linux-ide@vger.kernel.org>
Cc: Will Deacon <will.deacon@arm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Alan Stern <stern@rowland.harvard.edu>
Cc: Andrea Parri <parri.andrea@gmail.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
 2017-08-17 08:08:58 -07:00
Christophe JAILLET c88c094985 sata: ahci-da850: Fix some error handling paths in 'ahci_da850_probe()' 
'rc' is known to be 0 at this point.
If 'platform_get_resource()' or 'devm_ioremap()' fail, return -ENOMEM
instead of 0 which means success.

tj: Changed error code from -ENOMEM to -ENODEV for get_resource
    failure as suggested by Sergei.

Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
 2017-08-16 07:38:27 -07:00
Andrey Korolyov 591b6bb605 cs5536: add support for IDE controller variant 
Several legacy devices such as Geode-based Cisco ASA appliances
and DB800 development board do possess CS5536 IDE controller
with different PCI id than existing one. Using pata_generic is
not always feasible as at least DB800 requires MSR quirk from
pata_cs5536 to be used with vendor firmware.

Signed-off-by: Andrey Korolyov <andrey@xdel.ru>
CC: stable@vger.kernel.org
Signed-off-by: Tejun Heo <tj@kernel.org>
 2017-08-11 10:35:07 -07:00
Linus Walleij d872ced29d ata: sata_gemini: Introduce explicit IDE pin control 
The IDE pins are managed by the pin controller, if we want to
use these, we need to ask the pin controller to explicitly enable
them as by default, these pins are used for other business and
most users just rely on the SATA bridge.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2017-08-11 10:32:09 -07:00
Linus Walleij d99058a232 ata: sata_gemini: Retire custom pin control 
I added a proper pin control driver for the Gemini SoC, so retire
this custom code and rely on the pin controller to set up the pads.

The "IOMUX" which is routing signals between the ATA and SATA
bridge inside of the chip is not about pin control and remains in
place.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2017-08-11 10:31:49 -07:00
Nate Watterson 8eede5bc4e ata: ahci_platform: Add shutdown handler 
The newly introduced ahci_platform_shutdown() method is called during
system shutdown to disable host controller DMA and interrupts in order
to avoid potentially corrupting or otherwise interfering with a new
kernel being started with kexec.

Signed-off-by: Nate Watterson <nwatters@codeaurora.org>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2017-08-04 13:34:14 -07:00
Philipp Zabel afbd39a42e ata: sata_gemini: explicitly request exclusive reset control 
Commit a53e35db70 ("reset: Ensure drivers are explicit when requesting
reset lines") started to transition the reset control request API calls
to explicitly state whether the driver needs exclusive or shared reset
control behavior. Convert all drivers requesting exclusive resets to the
explicit API call so the temporary transition helpers can be removed.

No functional changes.

Cc: linux-ide@vger.kernel.org
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2017-08-02 08:14:25 -07:00
Julia Lawall cea9c8d344 ata: Drop unnecessary static 
Drop static on a local variable, when the variable is initialized before
any possible use.  Thus, the static has no benefit.

The semantic patch that fixes this problem is as follows:
(http://coccinelle.lip6.fr/)

// <smpl>
@bad exists@
position p;
identifier x;
type T;
@@
static T x@p;
...
x = <+...x...+>

@@
identifier x;
expression e;
type T;
position p != bad.p;
@@
-static
 T x@p;
 ... when != x
     when strict
?x = e;
// </smpl>

Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2017-08-02 08:11:53 -07:00
Jonathan Corbet 2f60e1ab2f libata: fix a couple of doc build warnings 
The kerneldoc comments for a couple of functions in drivers/ata/libata-eh.c
had fallen behind the current implementation, resulting in these doc build
warnings:

  ./drivers/ata/libata-eh.c:1449: warning: No description found for parameter 'link'
  ./drivers/ata/libata-eh.c:1449: warning: Excess function parameter 'ap' description in 'ata_eh_done'
  ./drivers/ata/libata-eh.c:1590: warning: No description found for parameter 'qc'
  ./drivers/ata/libata-eh.c:1590: warning: Excess function parameter 'dev' description in 'ata_eh_request_sense'

Update the comments and make the warnings go away.

Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2017-07-31 08:03:06 -07:00
Dan Carpenter 59a5e266c3 libata: array underflow in ata_find_dev() 
My static checker complains that "devno" can be negative, meaning that
we read before the start of the loop.  I've looked at the code, and I
think the warning is right.  This come from /proc so it's root only or
it would be quite a quite a serious bug.  The call tree looks like this:

proc_scsi_write() <- gets id and channel from simple_strtoul()
-> scsi_add_single_device() <- calls shost->transportt->user_scan()
   -> ata_scsi_user_scan()
      -> ata_find_dev()

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: stable@vger.kernel.org # all versions at this point
 2017-07-19 10:31:51 -04:00
Rob Herring cf8984bf84 ata: Convert to using %pOF instead of full_name 
Now that we have a custom printf format specifier, convert users of
full_name to use %pOF instead. This is preparation to remove storing
of the full path string for each node.

Signed-off-by: Rob Herring <robh@kernel.org>
Cc: Tejun Heo <tj@kernel.org>
Cc: linux-ide@vger.kernel.org
Signed-off-by: Tejun Heo <tj@kernel.org>
 2017-07-18 18:02:36 -04:00
Simon Horman 6ac1d1532c ata: sata_rcar: add gen[23] fallback compatibility strings 
Add fallback compatibility string for R-Car Gen 2 and 3.

In the case of Renesas R-Car hardware we know that there are generations of
SoCs, e.g. Gen 1 and 2. But beyond that its not clear what the relationship
between IP blocks might be. For example, I believe that r8a7790 is older
than r8a7791 but that doesn't imply that the latter is a descendant of the
former or vice versa.

We can, however, by examining the documentation and behaviour of the
hardware at run-time observe that the current driver implementation appears
to be compatible with the IP blocks on SoCs within a given generation.

For the above reasons and convenience when enabling new SoCs a
per-generation fallback compatibility string scheme being adopted for
drivers for Renesas SoCs.

Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
Acked-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2017-07-15 07:07:28 -04:00
Kefeng Wang ae86793700 libata: remove unused rc in ata_eh_handle_port_resume 
Remove unused variable ‘rc’.

Signed-off-by: Kefeng Wang <wangkefeng.wang@huawei.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2017-07-15 07:04:25 -04:00
Damien Le Moal 7cfdfdc82a libata: Cleanup ata_read_log_page() 
The warning message "READ LOG DMA EXT failed, trying unqueued" in
ata_read_log_page() as well as the macro name ATA_HORKAGE_NO_NCQ_LOG
are confusing: the command READ LOG DMA EXT is not an queued NCQ command
unless it is encapsulated in a RECEIVE FPDMA QUEUED command.
From ACS-4 READ LOG DMA EXT description:

"The device processes the READ LOG DMA EXT command in the NCQ feature
set environment (see 4.13.6) if the READ LOG DMA EXT command is
encapsulated in a RECEIVE FPDMA QUEUED command (see 7.30) with the
inputs encapsulated as shown in 7.23.6."

To avoid confusion, fix the warning messsage to mention switching to PIO and
not "unqueued" and rename the macro ATA_HORKAGE_NO_NCQ_LOG to
ATA_HORKAGE_NO_DMA_LOG.

Signed-off-by: Damien Le Moal <damien.lemoal@wdc.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2017-07-10 13:41:04 -04:00
Arnd Bergmann accd04738f ata: fix gemini Kconfig dependencies 
We cannot build the new ftide010 code without also building the faraday
sata bridge driver:

drivers/ata/pata_ftide010.o: In function `pata_ftide010_probe':
pata_ftide010.c:(.text+0x2b8): undefined reference to `gemini_sata_bridge_get'
pata_ftide010.c:(.text+0x32c): undefined reference to `gemini_sata_get_muxmode'
pata_ftide010.c:(.text+0x358): undefined reference to `gemini_sata_bridge_enabled'
drivers/ata/pata_ftide010.o: In function `pata_ftide010_gemini_port_stop':
pata_ftide010.c:(.text+0x520): undefined reference to `gemini_sata_stop_bridge'
drivers/ata/pata_ftide010.o: In function `pata_ftide010_gemini_port_start':
pata_ftide010.c:(.text+0x5bc): undefined reference to `gemini_sata_start_bridge'

This adjusts the Kconfig dependencies accordingly.

Fixes: be4e456ed3 ("ata: Add driver for Faraday Technology FTIDE010")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2017-07-10 13:40:02 -04:00
Linus Torvalds 109a5db504 Merge branch 'for-4.13' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/libata 
Pull libata updates from Tejun Heo:

 - Christoph added support for TCG OPAL self encrypting disks

 - Minwoo added support for ATA PASS-THROUGH(32)

 - Linus Walleij removed spurious drvdata assignments in some drivers

 - Support for a few new device and other fixes

* 'for-4.13' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/libata: (33 commits)
  sd: add support for TCG OPAL self encrypting disks
  libata: fix build warning from unused goto label
  libata: Support for an ATA PASS-THROUGH(32) command.
  ahci: Add Device ID for ASMedia 1061R and 1062R
  sata_via: Enable optional hotplug on VT6420
  ata: ahci_brcm: Avoid writing to read-only registers
  libata: Add the AHCI_HFLAG_NO_WRITE_TO_RO flag
  libata: Add the AHCI_HFLAG_YES_ALPM flag
  ata: ftide010: fix resource printing
  libata: make the function name in comment match the actual function
  ata: sata_rcar: make of_device_ids const.
  ata: pata_octeon_cf: make of_device_ids const.
  libata: Convert bare printks to pr_cont
  libahci: wrong comments in ahci_do_softreset()
  ata: declare ata_port_info structures as const
  ata: Add driver for Faraday Technology FTIDE010
  ata: Add DT bindings for the Gemini SATA bridge
  ata: Add DT bindings for Faraday Technology FTIDE010
  libata: implement SECURITY PROTOCOL IN/OUT
  libata: factor out a ata_identify_page_supported helper
  ...
 2017-07-06 09:41:58 -07:00
Linus Torvalds 408c9861c6 Power management updates for v4.13-rc1 
- Rework suspend-to-idle to allow it to take wakeup events signaled
    by the EC into account on ACPI-based platforms in order to properly
    support power button wakeup from suspend-to-idle on recent Dell
    laptops (Rafael Wysocki).
 
    That includes the core suspend-to-idle code rework, support for
    the Low Power S0 _DSM interface, and support for the ACPI INT0002
    Virtual GPIO device from Hans de Goede (required for USB keyboard
    wakeup from suspend-to-idle to work on some machines).
 
  - Stop trying to export the current CPU frequency via /proc/cpuinfo
    on x86 as that is inaccurate and confusing (Len Brown).
 
  - Rework the way in which the current CPU frequency is exported by
    the kernel (over the cpufreq sysfs interface) on x86 systems with
    the APERF and MPERF registers by always using values read from
    these registers, when available, to compute the current frequency
    regardless of which cpufreq driver is in use (Len Brown).
 
  - Rework the PCI/ACPI device wakeup infrastructure to remove the
    questionable and artificial distinction between "devices that
    can wake up the system from sleep states" and "devices that can
    generate wakeup signals in the working state" from it, which
    allows the code to be simplified quite a bit (Rafael Wysocki).
 
  - Fix the wakeup IRQ framework by making it use SRCU instead of
    RCU which doesn't allow sleeping in the read-side critical
    sections, but which in turn is expected to be allowed by the
    IRQ bus locking infrastructure (Thomas Gleixner).
 
  - Modify some computations in the intel_pstate driver to avoid
    rounding errors resulting from them (Srinivas Pandruvada).
 
  - Reduce the overhead of the intel_pstate driver in the HWP
    (hardware-managed P-states) mode and when the "performance"
    P-state selection algorithm is in use by making it avoid
    registering scheduler callbacks in those cases (Len Brown).
 
  - Rework the energy_performance_preference sysfs knob in
    intel_pstate by changing the values that correspond to
    different symbolic hint names used by it (Len Brown).
 
  - Make it possible to use more than one cpuidle driver at the same
    time on ARM (Daniel Lezcano).
 
  - Make it possible to prevent the cpuidle menu governor from using
    the 0 state by disabling it via sysfs (Nicholas Piggin).
 
  - Add support for FFH (Fixed Functional Hardware) MWAIT in ACPI C1
    on AMD systems (Yazen Ghannam).
 
  - Make the CPPC cpufreq driver take the lowest nonlinear performance
    information into account (Prashanth Prakash).
 
  - Add support for hi3660 to the cpufreq-dt driver, fix the
    imx6q driver and clean up the sfi, exynos5440 and intel_pstate
    drivers (Colin Ian King, Krzysztof Kozlowski, Octavian Purdila,
    Rafael Wysocki, Tao Wang).
 
  - Fix a few minor issues in the generic power domains (genpd)
    framework and clean it up somewhat (Krzysztof Kozlowski,
    Mikko Perttunen, Viresh Kumar).
 
  - Fix a couple of minor issues in the operating performance points
    (OPP) framework and clean it up somewhat (Viresh Kumar).
 
  - Fix a CONFIG dependency in the hibernation core and clean it up
    slightly (Balbir Singh, Arvind Yadav, BaoJun Luo).
 
  - Add rk3228 support to the rockchip-io adaptive voltage scaling
    (AVS) driver (David Wu).
 
  - Fix an incorrect bit shift operation in the RAPL power capping
    driver (Adam Lessnau).
 
  - Add support for the EPP field in the HWP (hardware managed
    P-states) control register, HWP.EPP, to the x86_energy_perf_policy
    tool and update msr-index.h with HWP.EPP values (Len Brown).
 
  - Fix some minor issues in the turbostat tool (Len Brown).
 
  - Add support for AMD family 0x17 CPUs to the cpupower tool and fix
    a minor issue in it (Sherry Hurwitz).
 
  - Assorted cleanups, mostly related to the constification of some
    data structures (Arvind Yadav, Joe Perches, Kees Cook, Krzysztof
    Kozlowski).
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Merge tag 'pm-4.13-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

Pull power management updates from Rafael Wysocki:
 "The big ticket items here are the rework of suspend-to-idle in order
  to add proper support for power button wakeup from it on recent Dell
  laptops and the rework of interfaces exporting the current CPU
  frequency on x86.

  In addition to that, support for a few new pieces of hardware is
  added, the PCI/ACPI device wakeup infrastructure is simplified
  significantly and the wakeup IRQ framework is fixed to unbreak the IRQ
  bus locking infrastructure.

  Also, there are some functional improvements for intel_pstate, tools
  updates and small fixes and cleanups all over.

  Specifics:

   - Rework suspend-to-idle to allow it to take wakeup events signaled
     by the EC into account on ACPI-based platforms in order to properly
     support power button wakeup from suspend-to-idle on recent Dell
     laptops (Rafael Wysocki).

     That includes the core suspend-to-idle code rework, support for the
     Low Power S0 _DSM interface, and support for the ACPI INT0002
     Virtual GPIO device from Hans de Goede (required for USB keyboard
     wakeup from suspend-to-idle to work on some machines).

   - Stop trying to export the current CPU frequency via /proc/cpuinfo
     on x86 as that is inaccurate and confusing (Len Brown).

   - Rework the way in which the current CPU frequency is exported by
     the kernel (over the cpufreq sysfs interface) on x86 systems with
     the APERF and MPERF registers by always using values read from
     these registers, when available, to compute the current frequency
     regardless of which cpufreq driver is in use (Len Brown).

   - Rework the PCI/ACPI device wakeup infrastructure to remove the
     questionable and artificial distinction between "devices that can
     wake up the system from sleep states" and "devices that can
     generate wakeup signals in the working state" from it, which allows
     the code to be simplified quite a bit (Rafael Wysocki).

   - Fix the wakeup IRQ framework by making it use SRCU instead of RCU
     which doesn't allow sleeping in the read-side critical sections,
     but which in turn is expected to be allowed by the IRQ bus locking
     infrastructure (Thomas Gleixner).

   - Modify some computations in the intel_pstate driver to avoid
     rounding errors resulting from them (Srinivas Pandruvada).

   - Reduce the overhead of the intel_pstate driver in the HWP
     (hardware-managed P-states) mode and when the "performance" P-state
     selection algorithm is in use by making it avoid registering
     scheduler callbacks in those cases (Len Brown).

   - Rework the energy_performance_preference sysfs knob in intel_pstate
     by changing the values that correspond to different symbolic hint
     names used by it (Len Brown).

   - Make it possible to use more than one cpuidle driver at the same
     time on ARM (Daniel Lezcano).

   - Make it possible to prevent the cpuidle menu governor from using
     the 0 state by disabling it via sysfs (Nicholas Piggin).

   - Add support for FFH (Fixed Functional Hardware) MWAIT in ACPI C1 on
     AMD systems (Yazen Ghannam).

   - Make the CPPC cpufreq driver take the lowest nonlinear performance
     information into account (Prashanth Prakash).

   - Add support for hi3660 to the cpufreq-dt driver, fix the imx6q
     driver and clean up the sfi, exynos5440 and intel_pstate drivers
     (Colin Ian King, Krzysztof Kozlowski, Octavian Purdila, Rafael
     Wysocki, Tao Wang).

   - Fix a few minor issues in the generic power domains (genpd)
     framework and clean it up somewhat (Krzysztof Kozlowski, Mikko
     Perttunen, Viresh Kumar).

   - Fix a couple of minor issues in the operating performance points
     (OPP) framework and clean it up somewhat (Viresh Kumar).

   - Fix a CONFIG dependency in the hibernation core and clean it up
     slightly (Balbir Singh, Arvind Yadav, BaoJun Luo).

   - Add rk3228 support to the rockchip-io adaptive voltage scaling
     (AVS) driver (David Wu).

   - Fix an incorrect bit shift operation in the RAPL power capping
     driver (Adam Lessnau).

   - Add support for the EPP field in the HWP (hardware managed
     P-states) control register, HWP.EPP, to the x86_energy_perf_policy
     tool and update msr-index.h with HWP.EPP values (Len Brown).

   - Fix some minor issues in the turbostat tool (Len Brown).

   - Add support for AMD family 0x17 CPUs to the cpupower tool and fix a
     minor issue in it (Sherry Hurwitz).

   - Assorted cleanups, mostly related to the constification of some
     data structures (Arvind Yadav, Joe Perches, Kees Cook, Krzysztof
     Kozlowski)"

* tag 'pm-4.13-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (69 commits)
  cpufreq: Update scaling_cur_freq documentation
  cpufreq: intel_pstate: Clean up after performance governor changes
  PM: hibernate: constify attribute_group structures.
  cpuidle: menu: allow state 0 to be disabled
  intel_idle: Use more common logging style
  PM / Domains: Fix missing default_power_down_ok comment
  PM / Domains: Fix unsafe iteration over modified list of domains
  PM / Domains: Fix unsafe iteration over modified list of domain providers
  PM / Domains: Fix unsafe iteration over modified list of device links
  PM / Domains: Handle safely genpd_syscore_switch() call on non-genpd device
  PM / Domains: Call driver's noirq callbacks
  PM / core: Drop run_wake flag from struct dev_pm_info
  PCI / PM: Simplify device wakeup settings code
  PCI / PM: Drop pme_interrupt flag from struct pci_dev
  ACPI / PM: Consolidate device wakeup settings code
  ACPI / PM: Drop run_wake from struct acpi_device_wakeup_flags
  PM / QoS: constify *_attribute_group.
  PM / AVS: rockchip-io: add io selectors and supplies for rk3228
  powercap/RAPL: prevent overridding bits outside of the mask
  PM / sysfs: Constify attribute groups
  ...
 2017-07-04 13:39:41 -07:00
Linus Torvalds 650fc870a2 There has been a fair amount of activity in the docs tree this time 
around.  Highlights include:
 
  - Conversion of a bunch of security documentation into RST
 
  - The conversion of the remaining DocBook templates by The Amazing
    Mauro Machine.  We can now drop the entire DocBook build chain.
 
  - The usual collection of fixes and minor updates.
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Merge tag 'docs-4.13' of git://git.lwn.net/linux

Pull documentation updates from Jonathan Corbet:
 "There has been a fair amount of activity in the docs tree this time
  around. Highlights include:

   - Conversion of a bunch of security documentation into RST

   - The conversion of the remaining DocBook templates by The Amazing
     Mauro Machine. We can now drop the entire DocBook build chain.

   - The usual collection of fixes and minor updates"

* tag 'docs-4.13' of git://git.lwn.net/linux: (90 commits)
  scripts/kernel-doc: handle DECLARE_HASHTABLE
  Documentation: atomic_ops.txt is core-api/atomic_ops.rst
  Docs: clean up some DocBook loose ends
  Make the main documentation title less Geocities
  Docs: Use kernel-figure in vidioc-g-selection.rst
  Docs: fix table problems in ras.rst
  Docs: Fix breakage with Sphinx 1.5 and upper
  Docs: Include the Latex "ifthen" package
  doc/kokr/howto: Only send regression fixes after -rc1
  docs-rst: fix broken links to dynamic-debug-howto in kernel-parameters
  doc: Document suitability of IBM Verse for kernel development
  Doc: fix a markup error in coding-style.rst
  docs: driver-api: i2c: remove some outdated information
  Documentation: DMA API: fix a typo in a function name
  Docs: Insert missing space to separate link from text
  doc/ko_KR/memory-barriers: Update control-dependencies example
  Documentation, kbuild: fix typo "minimun" -> "minimum"
  docs: Fix some formatting issues in request-key.rst
  doc: ReSTify keys-trusted-encrypted.txt
  doc: ReSTify keys-request-key.txt
  ...
 2017-07-03 21:13:25 -07:00
Christoph Hellwig d80210f25f sd: add support for TCG OPAL self encrypting disks 
Just wire up the generic TCG OPAL infrastructure to the SCSI disk driver
and the Security In/Out commands.

Note that I don't know of any actual SCSI disks that do support TCG OPAL,
but this is required to support ATA disks through libata.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2017-06-29 10:21:15 -04:00
Tejun Heo c8ccf812c3 libata: fix build warning from unused goto label 
b1ffbf854e ("libata: Support for an ATA PASS-THROUGH(32) command.")
introduced an unused goto label.  Remove it.

Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2017-06-29 10:20:59 -04:00
Rafael J. Wysocki 4d183d0419 ACPI / PM: Consolidate device wakeup settings code 
Currently, there are two separate ways of handling device wakeup
settings in the ACPI core, depending on whether this is runtime
wakeup or system wakeup (from sleep states).  However, after the
previous commit eliminating the run_wake ACPI device wakeup flag,
there is no difference between the two any more at the ACPI level,
so they can be combined.

For this reason, introduce acpi_pm_set_device_wakeup() to replace both
acpi_pm_device_run_wake() and acpi_pm_device_sleep_wake() and make it
check the ACPI device object's wakeup.valid flag to determine whether
or not the device can be set up to generate wakeup signals.

Also notice that zpodd_enable/disable_run_wake() only call
device_set_run_wake() because acpi_pm_device_run_wake() called
device_run_wake(), which is not done by acpi_pm_set_device_wakeup(),
so drop the now redundant device_set_run_wake() calls from there.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
 2017-06-28 01:52:32 +02:00
Minwoo Im b1ffbf854e libata: Support for an ATA PASS-THROUGH(32) command. 
SAT-4(SCSI/ATA Translation) supports for an ata pass-thru(32).
This patch will allow to translate an ata pass-thru(32) SCSI cmd
to an ATA cmd.

Signed-off-by: Minwoo Im <dn3108@gmail.com>
Reviewed-by: Bart Van Assche <bart.vanassche@wdc.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2017-06-27 11:25:39 -04:00
Shawn Lin 0ce968f382 ahci: Add Device ID for ASMedia 1061R and 1062R 
Adding ASMedia 1061R and 1062R platform device IDs for SATA.

Signed-off-by: Shawn Lin <shawn.lin@rock-chips.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2017-06-27 11:22:31 -04:00
Ondrej Zary 9863325893 sata_via: Enable optional hotplug on VT6420 
VT6420 seems to have the same hotplug capability as VT6421.

However, enabling hotplug needs to expose SCR registers which can cause
problems. It works for me but might break elsewhere. So add a module
parameter vt6420_hotplug to enable this feature.

Signed-off-by: Ondrej Zary <linux@rainbow-software.org>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2017-06-26 16:54:53 -04:00
Doug Berger da8fa9cca5 ata: ahci_brcm: Avoid writing to read-only registers 
This commit makes use of the AHCI_HFLAG_YES_ALPM flag to prevent
the driver from writing to the read-only Host Capability register.

It also sets the AHCI_HFLAG_NO_WRITE_TO_RO flag to prevent the AHCI
library from writing to read-only registers.

Signed-off-by: Doug Berger <opendmb@gmail.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2017-06-22 16:13:00 -04:00
Doug Berger 7fab72f85d libata: Add the AHCI_HFLAG_NO_WRITE_TO_RO flag 
While most hardware will simply ignore a write to a read-only register,
some hardware will signal an abort if this occurs.

This commit introduces the flag AHCI_HFLAG_NO_WRITE_TO_RO to prevent the
AHCI library from attempting to write to the HOST_CAP, HOST_CAP2, and
HOST_PORTS_IMPL registers which may be read-only.

Signed-off-by: Doug Berger <opendmb@gmail.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2017-06-22 16:12:59 -04:00
Doug Berger ef0da1bf76 libata: Add the AHCI_HFLAG_YES_ALPM flag 
Some hardware is capable of supporting Aggresive Link Power Management
even though it is not indicated by the Host Capability register.

This commit adds the AHCI_HFLAG_YES_ALPM flag to the AHCI library to
allow indication of this quirk when the Host Capability register is
Read Only and therefore cannot be changed.

Signed-off-by: Doug Berger <opendmb@gmail.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2017-06-22 16:12:59 -04:00
Arnd Bergmann d0318fb3c3 ata: ftide010: fix resource printing 
The new driver uses an incorrect format string for resource_size_t:

drivers/ata/pata_ftide010.c: In function 'pata_ftide010_probe':
drivers/ata/pata_ftide010.c:520:17: warning: format '%x' expects argument of type 'unsigned int', but argument 5 has type 'resource_size_t {aka long long unsigned int}' [-Wformat=]

The nicest way to print the address is to pretty-print the resource
using %pR.

Fixes: be4e456ed3 ("ata: Add driver for Faraday Technology FTIDE010")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2017-06-21 18:06:18 -04:00
Minwoo Im 01efd6006d libata: make the function name in comment match the actual function 
The function name used to be ata_scsiop_mode_select() but renamed to
ata_scsi_mode_select_xlat().  Update the comment accordingly.

tj: Minor commit desc update.

Signed-off-by: Minwoo Im <dn3108@gmail.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2017-06-20 13:35:15 -04:00
Arvind Yadav a5893870f8 ata: sata_rcar: make of_device_ids const. 
of_device_ids are not supposed to change at runtime. All functions
working with of_device_ids provided by <linux/of.h> work with const
of_device_ids. So mark the non-const structs as const.

File size before:
   text	   data	    bss	    dec	    hex	filename
   3946	   2296	      0	   6242	   1862	drivers/ata/sata_rcar.o

File size after constify sata_rcar_match.
   text	   data	    bss	    dec	    hex	filename
   5554	    696	      0	   6250	   186a	drivers/ata/sata_rcar.o

Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2017-06-19 14:03:06 -04:00
Arvind Yadav 79af3ae6e2 ata: pata_octeon_cf: make of_device_ids const. 
of_device_ids are not supposed to change at runtime. All functions
working with of_device_ids provided by <linux/of.h> work with const
of_device_ids. So mark the non-const structs as const.

File size before:
   text	   data	    bss	    dec	    hex	filename
    465	    696	      4	   1165	    48d	drivers/ata/pata_octeon_cf.o

File size after constify octeon_cf_match.
   text	   data	    bss	    dec	    hex	filename
    865	    280	      4	   1149	    47d	drivers/ata/pata_octeon_cf.o

Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2017-06-19 14:03:04 -04:00
Joe Perches 6ef56325d8 libata: Convert bare printks to pr_cont 
Linus Torvalds changed the behavior of printks without KERN_<LEVEL>.

Convert the continuation prints to use pr_cont.

At the same time, convert the existing printks with KERN_<LEVEL> to
pr_<level>

Miscellanea:

o Coalesce a multiline format

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2017-06-12 15:28:22 -04:00
Minwoo Im 08fc4756c3 libahci: wrong comments in ahci_do_softreset() 
AHCI 1.3.1 Spec says that software shall build two H2D register
FISes in the command list to send a software reset.
The comments in ahci_do_softreset() is currently D2H instead of H2D.

Signed-off-by: Minwoo Im <dn3108@gmail.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2017-06-12 14:07:49 -04:00
Bhumika Goyal f356b08205 ata: declare ata_port_info structures as const 
ata_port_info structures are either copied to other objects or their
references are stored in objects of type const. So, ata_port_info
structures having similar usage pattern can be made const.

Signed-off-by: Bhumika Goyal <bhumirks@gmail.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2017-06-12 14:06:34 -04:00
Linus Walleij be4e456ed3 ata: Add driver for Faraday Technology FTIDE010 
This adds a driver for the Faraday Technology FTIDE010
PATA IP block.

When used with the Storlink/Storm/Cortina Systems Gemini
SoC, the PATA interface is accompanied by a PATA<->SATA
bridge, so while the device appear as a PATA controller,
it attaches physically to SATA disks, and also has a
designated memory area with registers to set up the bridge.

The Gemini SATA bridge is separated into its own driver
file to make things modular and make it possible to reuse
the PATA driver as stand-alone on other systems than the
Gemini.

dmesg excerpt from the D-Link DIR-685 storage router:
gemini-sata-bridge 46000000.sata: SATA ID 00000e00, PHY ID: 01000100
gemini-sata-bridge 46000000.sata: set up the Gemini IDE/SATA nexus
ftide010 63000000.ata: set up Gemini PATA0
ftide010 63000000.ata: device ID 00000500, irq 26, io base 0x63000000
ftide010 63000000.ata: SATA0 (master) start
gemini-sata-bridge 46000000.sata: SATA0 PHY ready
scsi host0: pata-ftide010
ata1: PATA max UDMA/133 irq 26
ata1.00: ATA-8: INTEL SSDSA2CW120G3, 4PC10302, max UDMA/133
ata1.00: 234441648 sectors, multi 1: LBA48 NCQ (depth 0/32)
ata1.00: configured for UDMA/133
scsi 0:0:0:0: Direct-Access     ATA      INTEL SSDSA2CW12 0302 PQ: 0 ANSI: 5
ata1.00: Enabling discard_zeroes_data
sd 0:0:0:0: [sda] 234441648 512-byte logical blocks: (120 GB/112 GiB)
sd 0:0:0:0: [sda] Write Protect is off
sd 0:0:0:0: [sda] Write cache: enabled, read cache:
                  enabled, doesn't support DPO or FUA
ata1.00: Enabling discard_zeroes_data
ata1.00: Enabling discard_zeroes_data
sd 0:0:0:0: [sda] Attached SCSI disk

After this I can flawlessly mount and read/write copy etc files
from /dev/sda[n].

Cc: John Feng-Hsin Chiang <john453@faraday-tech.com>
Cc: Greentime Hu <green.hu@gmail.com>
Acked-by: Hans Ulli Kroll <ulli.kroll@googlemail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2017-06-12 12:02:51 -04:00
Christoph Hellwig 818831c8b2 libata: implement SECURITY PROTOCOL IN/OUT 
This allows us to use the generic OPAL code with ATA devices.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2017-06-05 15:29:22 -04:00
Christoph Hellwig a0fd2454a3 libata: factor out a ata_identify_page_supported helper 
tj: Updated line continuation style for consistency as pointed out by
    Sergei.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Cc: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2017-06-05 15:29:21 -04:00
Christoph Hellwig 1d51d5f390 libata: clarify log page naming / grouping 
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2017-06-05 15:29:21 -04:00
Christoph Hellwig efe205a320 libata: factor out a ata_log_supported helper 
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2017-06-05 15:29:21 -04:00
Christoph Hellwig f01f62c257 libata: move ata_read_log_page to libata-core.c 
It is core functionality, and only one of the users is in the EH code.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2017-06-05 15:29:21 -04:00
Yuantian Tang 0cee73f751 ahci: qoriq: add ls1088a platforms support 
Ls1088a is new introduced arm-based soc with sata support with
following features:

* Complies with the serial ATA 3.0 specification
  and the AHCI 1.3.1 specification
* Contains a high-speed descriptor-based DMA controller
* Supports the following:
* Speeds of 1.5 Gb/s (first-generation SATA),
  3 Gb/s (second-generation SATA), and 6 Gb/s (third-generation SATA)
* FIS-based switching
* Native command queuing (NCQ) commands
* Port multiplier operation
* Asynchronous notification
* SATA Vendor BIST mode

Signed-off-by: Tang Yuantian <andy.tang@nxp.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2017-06-02 09:49:33 -04:00
Tejun Heo f7cf69ae17 libata: fix error checking in in ata_parse_force_one() 
ata_parse_force_one() was incorrectly comparing @p to @endp when it
should have been comparing @id.  The only consequence is that it may
end up using an invalid port number in "libata.force" module param
instead of rejecting it.

Signed-off-by: Tejun Heo <tj@kernel.org>
Reported-by: Petru-Florin Mihancea <petrum@gmail.com>
Link: https://bugzilla.kernel.org/show_bug.cgi?id=195785
 2017-05-31 14:26:26 -04:00
Linus Walleij 74ee91d818 ata: sata_fsl: cut drvdata assignment 
ata_host_alloc_pinfo() assigns the host pointer to the
struct device * drvdata, do not assign it a second time.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2017-05-30 11:54:37 -04:00
Linus Walleij 7c61a26891 ata: samsung_cf: cut drvdata assignment 
ata_host_alloc_pinfo() assigns the host pointer to the
struct device * drvdata, do not assign it a second time.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2017-05-30 11:54:37 -04:00
Linus Walleij 0fe98fa056 ata: rb532_cf: cut drvdata assignment 
ata_host_alloc_pinfo() assigns the host pointer to the
struct device * drvdata, do not assign it a second time.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2017-05-30 11:54:37 -04:00
Linus Walleij a2136b31d3 ata: dwc_460ex: cut drvdata assignment 
ata_host_alloc_pinfo() assigns the host pointer to the
struct device * drvdata, do not assign it a second time.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2017-05-30 11:54:37 -04:00
Linus Walleij 62a98c2764 ata: ep93xx: cut drvdata assignment 
ata_host_alloc_pinfo() assigns the host pointer to the
struct device * drvdata, do not assign drv_data like this.
Since ata_host_alloc_pinfo() is called after this site, the
correct value is set eventually, but this assignment is just
plain pointless.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2017-05-30 11:54:36 -04:00
Linus Walleij 7ed4a21ad3 ata: bf54x: cut drvdata assignment 
ata_host_alloc_pinfo() assigns the host pointer to the
struct device * drvdata, do not assign it a second time.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2017-05-30 11:54:36 -04:00
Andrew Lunn 3e4240da0e Revert "ata: sata_mv: Convert to devm_ioremap_resource()" 
This reverts commit 368e5fbdfc.

devm_ioremap_resource() enforces that there are no overlapping
resources, where as devm_ioremap() does not. The sata phy driver needs
a subset of the sata IO address space, so maps some of the sata
address space. As a result, sata_mv now fails to probe, reporting it
cannot get its resources, and so we don't have any SATA disks.

Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Acked-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
Cc: stable@vger.kernel.org # v4.11+
Signed-off-by: Tejun Heo <tj@kernel.org>
 2017-05-24 10:56:32 -04:00
Mauro Carvalho Chehab 9bb9a39ce5 ata: update references for libata documentation 
The libata documentation is now using ReST. Update references
to it to point to the new place.

Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Acked-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2017-05-16 11:25:59 -04:00
Mauro Carvalho Chehab 6baf20bce8 libata: fix identation on a kernel-doc markup 
Sphinx got confused with the markup identation:
	./drivers/ata/libata-scsi.c:3402: ERROR: Unexpected indentation.

No functional changes.

Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2017-05-16 11:23:45 -04:00
Thomas Petazzoni c034640a32 ata: libahci: properly propagate return value of platform_get_irq() 
When platform_get_irq() fails, it returns an error code, which
libahci_platform and replaces it by -EINVAL. This commit fixes that by
propagating the error code. It fixes the situation where
platform_get_irq() returns -EPROBE_DEFER because the interrupt
controller is not available yet, and generally looks like the right
thing to do.

We pay attention to not show the "no irq" message when we are in an
EPROBE_DEFER situation, because the driver probing will be retried
later on, once the interrupt controller becomes available to provide
the interrupt.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2017-05-16 11:23:29 -04:00
Arvind Yadav 5dc63fdcc0 ata: sata_rcar: Handle return value of clk_prepare_enable 
Here, Clock enable can failed. So adding an error check for
clk_prepare_enable.

tj: minor style updates

Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2017-05-16 11:23:28 -04:00
Sui Chen 8bfd174312 ahci: Acer SA5-271 SSD Not Detected Fix 
(Correction in this resend: fixed function name acer_sa5_271_workaround; fixed
 the always-true condition in the function; fixed description.)

On the Acer Switch Alpha 12 (model number: SA5-271), the internal SSD may not
get detected because the port_map and CAP.nr_ports combination causes the driver
to skip the port that is actually connected to the SSD. More specifically,
either all SATA ports are identified as DUMMY, or all ports get ``link down''
and never get up again.

This problem occurs occasionally. When this problem occurs, CAP may hold a
value of 0xC734FF00 or 0xC734FF01 and port_map may hold a value of 0x00 or 0x01.
When this problem does not occur, CAP holds a value of 0xC734FF02 and port_map
may hold a value of 0x07. Overriding the CAP value to 0xC734FF02 and port_map to
0x7 significantly reduces the occurrence of this problem.

Link: https://bugzilla.kernel.org/attachment.cgi?id=253091
Signed-off-by: Sui Chen <suichen6@gmail.com>
Tested-by: Damian Ivanov <damianatorrpm@gmail.com>
Cc: stable@vger.kernel.org
Signed-off-by: Tejun Heo <tj@kernel.org>
 2017-05-16 11:23:28 -04:00
Tycho Andersen 5d7a288caf ata-sff: always map page before data transfer 
The XPFO [1] patchset may unmap pages from physmap if they happened to be
destined for userspace. If such a page is unmapped, it needs to be
remapped. Rather than test if a page is in the highmem/xpfo unmapped state,
Christoph suggested [2] that we simply always map the page.

v2: * drop comment about bounce buffer
    * don't save IRQs before kmap/unmap
    * formatting

[1]: https://lkml.org/lkml/2016/11/4/245
[2]: https://lkml.org/lkml/2016/11/4/253

Suggested-and-reviewed-by: Christoph Hellwig <hch@infradead.org>
Signed-off-by: Tycho Andersen <tycho@docker.com>
CC: Juerg Haefliger <juerg.haefliger@hpe.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2017-05-16 11:23:16 -04:00
Mauro Carvalho Chehab 19285f3c46 ata: update references for libata documentation 
The libata documentation is now using ReST. Update references
to it to point to the new place.

Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
 2017-05-16 08:44:20 -03:00
Mauro Carvalho Chehab 83af4e1f80 libata: fix identation on a kernel-doc markup 
Sphinx got confused with the markup identation:
	./drivers/ata/libata-scsi.c:3402: ERROR: Unexpected indentation.

No functional changes.

Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
 2017-05-16 08:44:12 -03:00
Linus Torvalds 0160e00ae8 ARM: SoC driver updates 
Driver updates for ARM SoCs.
 
 * Reset subsystem, merged through arm-soc by tradition:
  - Make bool drivers explicitly non-modular
  - New support for i.MX7 and Arria10 reset controllers
 
 * PATA driver for Palmchip BK371 (acked by Tejun)
 
 * Power domain drivers for i.MX (GPC, GPCv2)
  - Moved out of mach-imx for GPC
  - Bunch of tweaks, fixes, etc
 
 * PMC support for Tegra186
 
 * SoC detection support for Renesas RZ/G1H and RZ/G1N
 
 * Move Tegra flow controller driver from mach directory to drivers/soc
  - (Power management / CPU power driver)
 
 * Misc smaller tweaks for other platforms
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Merge tag 'armsoc-drivers' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc

Pull ARM SoC driver updates from Olof Johansson:
 "Driver updates for ARM SoCs:

  Reset subsystem, merged through arm-soc by tradition:
   - Make bool drivers explicitly non-modular
   - New support for i.MX7 and Arria10 reset controllers

  PATA driver for Palmchip BK371 (acked by Tejun)

  Power domain drivers for i.MX (GPC, GPCv2)
   - Moved out of mach-imx for GPC
   - Bunch of tweaks, fixes, etc

  PMC support for Tegra186

  SoC detection support for Renesas RZ/G1H and RZ/G1N

  Move Tegra flow controller driver from mach directory to drivers/soc
   - (Power management / CPU power driver)

  Misc smaller tweaks for other platforms"

* tag 'armsoc-drivers' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (60 commits)
  soc: pm-domain: Fix the mangled urls
  soc: renesas: rcar-sysc: Add support for R-Car H3 ES2.0
  soc: renesas: rcar-sysc: Add support for fixing up power area tables
  soc: renesas: Register SoC device early
  soc: imx: gpc: add workaround for i.MX6QP to the GPC PD driver
  dt-bindings: imx-gpc: add i.MX6 QuadPlus compatible
  soc: imx: gpc: add defines for domain index
  soc: imx: Add GPCv2 power gating driver
  dt-bindings: Add GPCv2 power gating driver
  ARM/clk: move the ICST library to drivers/clk
  ARM: plat-versatile: remove stale clock header
  ARM: keystone: Drop PM domain support for k2g
  soc: ti: Add ti_sci_pm_domains driver
  dt-bindings: Add TI SCI PM Domains
  PM / Domains: Do not check if simple providers have phandle cells
  PM / Domains: Add generic data pointer to genpd data struct
  soc/tegra: Add initial flowctrl support for Tegra132/210
  soc/tegra: flowctrl: Add basic platform driver
  soc/tegra: Move Tegra flowctrl driver
  ARM: tegra: Remove unnecessary inclusion of flowctrl header
  ...
 2017-05-09 10:01:15 -07:00
Linus Torvalds e69bbe75de Merge branch 'for-4.12' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/libata 
Pull libata updates from Tejun Heo:
 "The biggest core change is removal of SCT WRITE SAME support, which
  never worked properly.

  Other than that, trivial updates in core code and specific embedded
  driver updates"

* 'for-4.12' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/libata:
  libata: remove SCT WRITE SAME support
  libata: reject passthrough WRITE SAME requests
  dt-bindings: ata: add DT bindings for ahci-dm816 SATA controller
  ata: ahci: add support for DaVinci DM816 SATA controller
  pata: remove the at91 driver
  libata: make ata_sg_clean static over again
  libata: use setup_deferrable_timer
  ata: allow subsystem to be used on m32r and s390 archs
  Delete redundant return value check of platform_get_resource()
  ata: constify of_device_id structures
 2017-05-01 13:34:49 -07:00
Christoph Hellwig 63ccc19164 libata: remove SCT WRITE SAME support 
This was already disabled a while ago because it caused I/O errors,
and it's severly getting into the way of the discard / write zeroes
rework.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2017-04-28 18:09:59 -04:00
Christoph Hellwig c6ade20f5e libata: reject passthrough WRITE SAME requests 
The WRITE SAME to TRIM translation rewrites the DATA OUT buffer.  While
the SCSI code accomodates for this by passing a read-writable buffer
userspace applications don't cater for this behavior.  In fact it can
be used to rewrite e.g. a readonly file through mmap and should be
considered as a security fix.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Cc: stable@vger.kernel.org
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2017-04-28 18:08:21 -04:00
Ondrej Zary 3cf864520e sata_via: Enable hotplug only on VT6421 
Commit 57e5568fda ("sata_via: Implement hotplug for VT6421") adds
hotplug IRQ handler for VT6421 but enables hotplug on all chips. This
is a bug because it causes "irq xx: nobody cared" error on VT6420 when
hot-(un)plugging a drive:

[  381.839948] irq 20: nobody cared (try booting with the "irqpoll" option)
[  381.840014] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.10.0-rc5+ #148
[  381.840066] Hardware name:          P4VM800/P4VM800, BIOS P1.60 05/29/2006
[  381.840117] Call Trace:
[  381.840167]  <IRQ>
[  381.840225]  ? dump_stack+0x44/0x58
[  381.840278]  ? __report_bad_irq+0x14/0x97
[  381.840327]  ? handle_edge_irq+0xa5/0xa5
[  381.840376]  ? note_interrupt+0x155/0x1cf
[  381.840426]  ? handle_edge_irq+0xa5/0xa5
[  381.840474]  ? handle_irq_event_percpu+0x32/0x38
[  381.840524]  ? handle_irq_event+0x1f/0x38
[  381.840573]  ? handle_fasteoi_irq+0x69/0xb8
[  381.840625]  ? handle_irq+0x4f/0x5d
[  381.840672]  </IRQ>
[  381.840726]  ? do_IRQ+0x2e/0x8b
[  381.840782]  ? common_interrupt+0x2c/0x34
[  381.840836]  ? mwait_idle+0x60/0x82
[  381.840892]  ? arch_cpu_idle+0x6/0x7
[  381.840949]  ? do_idle+0x96/0x18e
[  381.841002]  ? cpu_startup_entry+0x16/0x1a
[  381.841057]  ? start_kernel+0x319/0x31c
[  381.841111]  ? startup_32_smp+0x166/0x168
[  381.841165] handlers:
[  381.841219] [<c12a7263>] ata_bmdma_interrupt
[  381.841274] Disabling IRQ #20

Seems that VT6420 can do hotplug too (there's no documentation) but the
comments say that SCR register access (required for detecting hotplug
events) can cause problems on these chips.

For now, just keep hotplug disabled on anything other than VT6421.

Signed-off-by: Ondrej Zary <linux@rainbow-software.org>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2017-04-11 09:12:18 +09:00
Bartlomiej Zolnierkiewicz 396ff64d44 pata_bk3710: clear status bits of BMISP on chipset initialization 
Clear IORDYINT, INTRSTAT and DMAERROR bits of BMISP register
(value '1' needs to be written to the bit to clear it).

Suggested-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Acked-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Acked-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Signed-off-by: Sekhar Nori <nsekhar@ti.com>
 2017-03-30 16:13:04 +05:30
Bartlomiej Zolnierkiewicz c217ff26b0 pata_bk3710: disable IORDY Timer on chipset initialization 
Disable IORDY Timer as the driver doesn't handle IORDY Timer
interrupt anyway.

Suggested-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Acked-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Acked-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Signed-off-by: Sekhar Nori <nsekhar@ti.com>
 2017-03-30 16:12:26 +05:30
Bartlomiej Zolnierkiewicz 76a40ca82f ata: add Palmchip BK3710 PATA controller driver 
Add Palmchip BK3710 PATA controller driver.

Acked-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Acked-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Signed-off-by: Sekhar Nori <nsekhar@ti.com>
 2017-03-30 16:11:32 +05:30
Tejun Heo a431ecd2d4 Revert "pata_atiixp: Don't use unconnected secondary port on SB600/SB700" 
This reverts commit 5946fdaee4.

The original commit's assumption that the secondary port is
unconnected turns out to be false.

Signed-off-by: Tejun Heo <tj@kernel.org>
Reported-by: Markku Pesonen <tourula@gmail.com>
Fixes: 5946fdaee4 ("pata_atiixp: Don't use unconnected secondary port on SB600/SB700")
Cc: Darren Stevens <darren@stevens-zone.net>
 2017-03-27 13:52:00 -04:00
Bartosz Golaszewski df46e6a4c0 ata: ahci: add support for DaVinci DM816 SATA controller 
This SATA controller is quite similar to the one present on the DA850
SoC, but the PHY configuration is different and it supports two HBA
ports.

The IP suffers from the same PMP issue the DA850 does - if we enable
PMP but don't use it - softreset fails. Appropriate workaround was
implemented in this driver as well.

Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2017-03-24 11:40:03 -04:00
Boris Brezillon 3075b62d15 pata: remove the at91 driver 
This driver is orphan since commit b2026f708e ("ARM: at91: remove
at91sam9260/at91sam9g20 legacy board support"). Given that nobody cared
adding DT support to it, it probably means it's no longer used and is
thus a good candidate for removal.

Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Acked-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Acked-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2017-03-16 17:10:52 -04:00
Jason Yan af27e01cfc libata: make ata_sg_clean static over again 
Fixes the following sparse warning:

drivers/ata/libata-core.c:4913:6: warning: symbol 'ata_sg_clean' was not
declared. Should it be static?

Signed-off-by: Jason Yan <yanaijie@huawei.com>
 2017-03-13 13:08:26 -04:00
Geliang Tang 7c92357c91 libata: use setup_deferrable_timer 
Use setup_deferrable_timer() instead of init_timer_deferrable() to
simplify the code.

Signed-off-by: Geliang Tang <geliangtang@gmail.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2017-03-13 13:07:29 -04:00
Yuantian Tang 6022c5cadf ahci: qoriq: correct the sata ecc setting error 
Sata ecc is controlled by only 1 bit which is 24bit in big-endian
in ecc register. So only setting 24bit to disable sata ecc prevents
other bits from being overwritten in ecc register.

Signed-off-by: Tang Yuantian <andy.tang@nxp.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2017-03-09 11:55:23 -05:00
Bartlomiej Zolnierkiewicz b2a4b7862d ata: allow subsystem to be used on m32r and s390 archs 
Both archs should work just fine with libata subsystem nowadays.

Suggested-by: Christoph Hellwig <hch@infradead.org>
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2017-03-07 14:25:51 -05:00
Belen Sarabia 487d499c67 Delete redundant return value check of platform_get_resource() 
Delete error handling from the result of a call to platform_get_resource()
when the value is immediately passed to devm_ioremap_resource().

Signed-off-by: Belen Sarabia <belensarabia@gmail.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2017-03-06 15:40:59 -05:00
Tejun Heo 0580b762a4 libata: drop WARN from protocol error in ata_sff_qc_issue() 
ata_sff_qc_issue() expects upper layers to never issue commands on a
command protocol that it doesn't implement.  While the assumption
holds fine with the usual IO path, nothing filters based on the
command protocol in the passthrough path (which was added later),
allowing the warning to be tripped with a passthrough command with the
right (well, wrong) protocol.

Failing with AC_ERR_SYSTEM is the right thing to do anyway.  Remove
the unnecessary WARN.

Reported-by: Dmitry Vyukov <dvyukov@google.com>
Link: http://lkml.kernel.org/r/CACT4Y+bXkvevNZU8uP6X0QVqsj6wNoUA_1exfTSOzc+SmUtMOA@mail.gmail.com
Signed-off-by: Tejun Heo <tj@kernel.org>
 2017-03-06 15:26:54 -05:00
Gwendal Grignou d85fc67dd1 libata: transport: Remove circular dependency at free time 
Without this patch, failed probe would not free resources like irq.

ata port tdev object currently hold a reference to the ata port
object.  Therefore the ata port object release function will not get
called until the ata_tport_release is called. But that would never
happen, releasing the last reference of ata port dev is done by
scsi_host_release, which is called by ata_host_release when the ata
port object is released.

The ata device objects actually do not need to explicitly hold a
reference to their real counterpart, given the transport objects are
the children of these objects and device_add() is call for each child.
We know the parent will not be deleted until we call the child's
device_del().

Reported-by: Matthew Whitehead <tedheadster@gmail.com>
Tested-by: Matthew Whitehead <tedheadster@gmail.com>
Suggested-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Gwendal Grignou <gwendal@chromium.org>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2017-03-06 15:24:48 -05:00
Bhumika Goyal e3779f6a4e ata: constify of_device_id structures 
Declare of_device_id structures as const as they are either passed to
the macro MODULE_DEVICE_TABLE or stored in the of_match_table field of a
device_driver structure. This field is of type const, so of_device_id
structures having this property can be made const too.

Cross compiled the files drivers/ata/pata_macio.c and
drivers/ata/pata_mpc52xx.c for powerpc architecture.

Signed-off-by: Bhumika Goyal <bhumirks@gmail.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2017-03-06 15:18:01 -05:00
Linus Torvalds a3b4924b02 SCSI misc on 20170303 
This is the set of stuff that didn't quite make the initial pull and a
 set of fixes for stuff which did.  The new stuff is basically lpfc
 (nvme), qedi and aacraid.  The fixes cover a lot of previously
 submitted stuff, the most important of which probably covers some of
 the failing irq vectors allocation and other fallout from having the
 SCSI command allocated as part of the block allocation functions.
 
 Signed-off-by: James E.J. Bottomley <jejb@linux.vnet.ibm.com>
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Merge tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi

Pull more SCSI updates from James Bottomley:
 "This is the set of stuff that didn't quite make the initial pull and a
  set of fixes for stuff which did.

  The new stuff is basically lpfc (nvme), qedi and aacraid. The fixes
  cover a lot of previously submitted stuff, the most important of which
  probably covers some of the failing irq vectors allocation and other
  fallout from having the SCSI command allocated as part of the block
  allocation functions"

* tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi: (59 commits)
  scsi: qedi: Fix memory leak in tmf response processing.
  scsi: aacraid: remove redundant zero check on ret
  scsi: lpfc: use proper format string for dma_addr_t
  scsi: lpfc: use div_u64 for 64-bit division
  scsi: mac_scsi: Fix MAC_SCSI=m option when SCSI=m
  scsi: cciss: correct check map error.
  scsi: qla2xxx: fix spelling mistake: "seperator" -> "separator"
  scsi: aacraid: Fixed expander hotplug for SMART family
  scsi: mpt3sas: switch to pci_alloc_irq_vectors
  scsi: qedf: fixup compilation warning about atomic_t usage
  scsi: remove scsi_execute_req_flags
  scsi: merge __scsi_execute into scsi_execute
  scsi: simplify scsi_execute_req_flags
  scsi: make the sense header argument to scsi_test_unit_ready mandatory
  scsi: sd: improve TUR handling in sd_check_events
  scsi: always zero sshdr in scsi_normalize_sense
  scsi: scsi_dh_emc: return success in clariion_std_inquiry()
  scsi: fix memory leak of sdpk on when gd fails to allocate
  scsi: sd: make sd_devt_release() static
  scsi: qedf: Add QLogic FastLinQ offload FCoE driver framework.
  ...
 2017-03-03 21:36:56 -08:00
Masahiro Yamada 4091fb95b5 scripts/spelling.txt: add "followings" pattern and fix typo instances 
Fix typos and add the following to the scripts/spelling.txt:

  followings||following

While we are here, add a missing colon in the boilerplate in DT binding
documents.  The "you SoC" in allwinner,sunxi-pinctrl.txt was fixed as
well.

I reworded "as the followings:" to "as follows:" for
drivers/usb/gadget/udc/renesas_usb3.c.

Link: http://lkml.kernel.org/r/1481573103-11329-32-git-send-email-yamada.masahiro@socionext.com
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
 2017-02-27 18:43:47 -08:00
Linus Torvalds b2e3c4319d ARM: SoC driver updates 
Driver updates for ARM SoCs.
 
 A handful of driver changes this time around. The larger changes are:
 
  - Reset drivers for hi3660 and zx2967
  - AHCI driver for Davinci, acked by Tejun and brought in here due to
    platform dependencies
  - Cleanups of atmel-ebi (External Bus Interface)
  - Tweaks for Rockchip GRF (General Register File) usage (kitchensink misc
    register range on the SoCs)
  - PM domains changes for support of two new ZTE SoCs (zx296718 and zx2967)
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Merge tag 'armsoc-drivers' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc

Pull ARM SoC driver updates from Arnd Bergmann:
 "Driver updates for ARM SoCs.

  A handful of driver changes this time around. The larger changes are:

   - Reset drivers for hi3660 and zx2967

   - AHCI driver for Davinci, acked by Tejun and brought in here due to
     platform dependencies

   - Cleanups of atmel-ebi (External Bus Interface)

   - Tweaks for Rockchip GRF (General Register File) usage (kitchensink
     misc register range on the SoCs)

   - PM domains changes for support of two new ZTE SoCs (zx296718 and
     zx2967)"

* tag 'armsoc-drivers' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (53 commits)
  soc: samsung: pmu: Add register defines for pad retention control
  reset: make zx2967 explicitly non-modular
  reset: core: fix reset_control_put
  soc: samsung: pm_domains: Read domain name from the new label property
  soc: samsung: pm_domains: Remove message about failed memory allocation
  soc: samsung: pm_domains: Remove unused name field
  soc: samsung: pm_domains: Use full names in subdomains registration log
  sata: ahci-da850: un-hardcode the MPY bits
  sata: ahci-da850: add a workaround for controller instability
  sata: ahci: export ahci_do_hardreset() locally
  sata: ahci-da850: implement a workaround for the softreset quirk
  sata: ahci-da850: add device tree match table
  sata: ahci-da850: get the sata clock using a connection id
  soc: samsung: pmu: Remove duplicated define for ARM_L2_OPTION register
  memory: atmel-ebi: Enable the SMC clock if specified
  soc: samsung: pmu: Remove unused and duplicated defines
  memory: atmel-ebi: Properly handle multiple reference to the same CS
  memory: atmel-ebi: Fix the test to enable generic SMC logic
  soc: samsung: pm_domains: Add new Exynos5433 compatible
  soc: samsung: pmu: Add dummy support for Exynos5433 SoC
  ...
 2017-02-23 15:57:04 -08:00
Christoph Hellwig 76aaf87b4c scsi: merge __scsi_execute into scsi_execute 
All but one caller want the decoded sense header, so offer the existing
__scsi_execute helper as the public scsi_execute API to simply the
callers.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
 2017-02-23 16:57:19 -05:00
Linus Torvalds 79f4d1d5c0 Merge branch 'for-4.11' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/libata 
Pull libata updates from Tejun Heo:

 - Bartlomiej added pata_falcon

 - Christoph is trying to remove use of static 4k buf.  It's still WIP

 - config cleanup around HAS_DMA

 - other fixes and driver-specific changes

* 'for-4.11' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/libata: (29 commits)
  ata: pata_of_platform: using of_property_read_u32() helper
  pata_atiixp: Don't use unconnected secondary port on SB600/SB700
  libata-sff: Don't scan disabled ports when checking for legacy mode.
  pata_octeon_cf: remove unused local variables from octeon_cf_set_piomode()
  ahci: qoriq: added ls2088a platforms support
  ahci: qoriq: report error when ecc register address is missing in dts
  ahci: qoriq: added a condition to enable dma coherence
  Revert "libata: switch to dynamic allocation instead of ata_scsi_rbuf"
  ahci: imx: fix building without hwmon or thermal
  ata: add Atari Falcon PATA controller driver
  ata: pass queued command to ->sff_data_xfer method
  ata: allow subsystem to be used on m68k arch
  libata: switch to dynamic allocation instead of ata_scsi_rbuf
  libata: don't call ata_scsi_rbuf_fill for command without a response buffer
  libata: call ->scsi_done from ata_scsi_simulate
  libata: remove the done callback from ata_scsi_args
  libata: move struct ata_scsi_args to libata-scsi.c
  libata: avoid global response buffer in atapi_qc_complete
  libata-eh: Use switch() instead of sparse array for protocol strings
  ata: sata_mv: Convert to devm_ioremap_resource()
  ...
 2017-02-21 17:21:32 -08:00
Linus Torvalds cdc194705d SCSI misc on 20170220 
This update includes the usual round of major driver updates (ncr5380,
 ufs, lpfc, be2iscsi, hisi_sas, storvsc, cxlflash, aacraid,
 megaraid_sas, ).  There's also an assortment of minor fixes and the
 major update of switching a bunch of drivers to pci_alloc_irq_vectors
 from Christoph.
 
 Signed-off-by: James E.J. Bottomley <jejb@linux.vnet.ibm.com>
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Merge tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi

Pull SCSI updates from James Bottomley:
 "This update includes the usual round of major driver updates (ncr5380,
  ufs, lpfc, be2iscsi, hisi_sas, storvsc, cxlflash, aacraid,
  megaraid_sas, ...).

  There's also an assortment of minor fixes and the major update of
  switching a bunch of drivers to pci_alloc_irq_vectors from Christoph"

* tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi: (188 commits)
  scsi: megaraid_sas: handle dma_addr_t right on 32-bit
  scsi: megaraid_sas: array overflow in megasas_dump_frame()
  scsi: snic: switch to pci_irq_alloc_vectors
  scsi: megaraid_sas: driver version upgrade
  scsi: megaraid_sas: Change RAID_1_10_RMW_CMDS to RAID_1_PEER_CMDS and set value to 2
  scsi: megaraid_sas: Indentation and smatch warning fixes
  scsi: megaraid_sas: Cleanup VD_EXT_DEBUG and SPAN_DEBUG related debug prints
  scsi: megaraid_sas: Increase internal command pool
  scsi: megaraid_sas: Use synchronize_irq to wait for IRQs to complete
  scsi: megaraid_sas: Bail out the driver load if ld_list_query fails
  scsi: megaraid_sas: Change build_mpt_mfi_pass_thru to return void
  scsi: megaraid_sas: During OCR, if get_ctrl_info fails do not continue with OCR
  scsi: megaraid_sas: Do not set fp_possible if TM capable for non-RW syspdIO, change fp_possible to bool
  scsi: megaraid_sas: Remove unused pd_index from megasas_build_ld_nonrw_fusion
  scsi: megaraid_sas: megasas_return_cmd does not memset IO frame to zero
  scsi: megaraid_sas: max_fw_cmds are decremented twice, remove duplicate
  scsi: megaraid_sas: update can_queue only if the new value is less
  scsi: megaraid_sas: Change max_cmd from u32 to u16 in all functions
  scsi: megaraid_sas: set pd_after_lb from MR_BuildRaidContext and initialize pDevHandle to MR_DEVHANDLE_INVALID
  scsi: megaraid_sas: latest controller OCR capability from FW before sending shutdown DCMD
  ...
 2017-02-21 11:51:42 -08:00
Jens Axboe 818551e2b2 Merge branch 'for-4.11/next' into for-4.11/linus-merge 
Signed-off-by: Jens Axboe <axboe@fb.com>
 2017-02-17 14:08:19 -07:00
Christoph Hellwig b6a05c823f scsi: remove eh_timed_out methods in the transport template 
Instead define the timeout behavior purely based on the host_template
eh_timed_out method and wire up the existing transport implementations
in the host templates.  This also clears up the confusion that the
transport template method overrides the host template one, so some
drivers have to re-override the transport template one.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Reviewed-by: Tyrel Datwyler <tyreld@linux.vnet.ibm.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
 2017-02-06 19:10:03 -05:00
Christoph Hellwig 57292b58dd block: introduce blk_rq_is_passthrough 
This can be used to check for fs vs non-fs requests and basically
removes all knowledge of BLOCK_PC specific from the block layer,
as well as preparing for removing the cmd_type field in struct request.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@fb.com>
 2017-01-31 14:00:34 -07:00
Bartosz Golaszewski cdf0ead374 sata: ahci-da850: un-hardcode the MPY bits 
All platforms using this driver now register the SATA refclk. Remove
the hardcoded default value from the driver and instead read the rate
of the external clock and calculate the required MPY value from it.

Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Acked-by: Tejun Heo <tj@kernel.org>
[nsekhar@ti.com: fix checkpatch warning about an unneeded else]
Signed-off-by: Sekhar Nori <nsekhar@ti.com>
 2017-01-31 20:41:52 +05:30
Bartosz Golaszewski d3d557cf64 sata: ahci-da850: add a workaround for controller instability 
We have a use case with the da850 SATA controller where at PLL0
frequency of 456MHz (needed to properly service the LCD controller)
the chip becomes unstable and the hardreset operation is ignored the
first time 50% of times.

The sata core driver already retries to resume the link because some
controllers ignore writes to the SControl register, but just retrying
the resume operation doesn't work - we need to issue he phy/wake reset
again to make it work.

Reimplement ahci_hardreset() in the driver and poke the controller a
couple times before really giving up.

Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Acked-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Sekhar Nori <nsekhar@ti.com>
 2017-01-31 17:48:29 +05:30
Bartosz Golaszewski d436501e06 sata: ahci: export ahci_do_hardreset() locally 
We need a way to retrieve the information about the online state of
the link in the ahci-da850 driver.

Create a new function: ahci_do_hardreset() which is called from
ahci_hardreset() for backwards compatibility, but has an additional
argument: 'online' - which can be used to check if the link is online
after this function returns.

The new routine will be used in the ahci-da850 driver to avoid code
duplication when implementing a workaround for tha da850 SATA
controller quirk/instability.

Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Acked-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Sekhar Nori <nsekhar@ti.com>
 2017-01-31 17:48:21 +05:30
Bartosz Golaszewski f4d435f326 sata: ahci-da850: implement a workaround for the softreset quirk 
There's an issue with the da850 SATA controller: if port multiplier
support is compiled in, but we're connecting the drive directly to
the SATA port on the board, the drive can't be detected.

To make SATA work on the da850-lcdk board: first try to softreset
with pmp - if the operation fails with -EBUSY, retry without pmp.

Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Acked-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Sekhar Nori <nsekhar@ti.com>
 2017-01-31 17:48:11 +05:30
Bartosz Golaszewski bf4ae3f078 sata: ahci-da850: add device tree match table 
We're using device tree for da850-lcdk. Add the match table to allow
to probe the driver.

Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Acked-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Sekhar Nori <nsekhar@ti.com>
 2017-01-31 17:48:04 +05:30
Bartosz Golaszewski 82dbe1a68f sata: ahci-da850: get the sata clock using a connection id 
In preparation for using two clocks in the driver (the sysclk2-based
clock and the external REFCLK), check if we got the functional clock
after calling ahci_platform_get_resources(). If not, retry calling
clk_get() with con_id specified.

Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Acked-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Sekhar Nori <nsekhar@ti.com>
 2017-01-31 17:25:13 +05:30
Christoph Hellwig 82ed4db499 block: split scsi_request out of struct request 
And require all drivers that want to support BLOCK_PC to allocate it
as the first thing of their private data.  To support this the legacy
IDE and BSG code is switched to set cmd_size on their queues to let
the block layer allocate the additional space.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@fb.com>
 2017-01-27 15:08:35 -07:00
Kefeng Wang 73b2951414 ata: pata_of_platform: using of_property_read_u32() helper 
Using better of_property_read_u32() than generic of_get_property().

Cc: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Cc: Hans de Goede <hdegoede@redhat.com>
Cc: Tejun Heo <tj@kernel.org>
Signed-off-by: Kefeng Wang <wangkefeng.wang@huawei.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2017-01-24 11:15:01 -05:00
Darren Stevens 5946fdaee4 pata_atiixp: Don't use unconnected secondary port on SB600/SB700 
The SB600 and SB700 southbridge chips from ATI/AMD only have
connections for the primary IDE port. As these chips have unique
pci device ID's use these to mark the secondary port as 'dummy'

Signed-off-by: Darren Stevens <darren@stevens-zone.net>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2017-01-23 14:38:30 -05:00
Darren Stevens 589d572671 libata-sff: Don't scan disabled ports when checking for legacy mode. 
libata-sff.c checks for legacy mode by testing if both primary and
secondary ports on a controller are in legacy mode and selects legacy
if either one is. However on some south bridge chips (e.g AMD
SB600/SB700) the secondary port is not wired, and when it is disabled
by setting the disable bit in the PCI header it appears as a fixed
legacy port.

Prevent incorrect detection by not testing ports that are marked as
'dummy'

tj: Addressed Sergei's review points.  Other style edits.

Signed-off-by: Darren Stevens <darren@stevens-zone.net>
Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
 2017-01-23 14:35:17 -05:00
Tejun Heo d786b91f42 pata_octeon_cf: remove unused local variables from octeon_cf_set_piomode() 
@t1 and @t2i are calculated along with @t2 but never used.  Drop them.

Signed-off-by: Tejun Heo <tj@kernel.org>
Reported-by: David Binderman <dcb314@hotmail.com>
 2017-01-23 14:28:51 -05:00
Tang Yuantian ce8f45370e ahci: qoriq: added ls2088a platforms support 
Ls2088a is new introduced arm-based soc with sata support with
following features:
1. Complies with the serial ATA 3.0 specification and the AHCI 1.3.1
   specification
2. Contains a high-speed descriptor-based DMA controller
3. Supports the following:
   a. Speeds of 1.5 Gb/s (first-generation SATA), 3 Gb/s
      (second-generation SATA), and 6 Gb/s (third-generation SATA)
   b. FIS-based switching
   c. Native command queuing (NCQ) commands
   d. Port multiplier operation
   e. Asynchronous notification
   f. SATA BIST mode

Signed-off-by: Tang Yuantian <yuantian.tang@nxp.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2017-01-20 08:31:14 -05:00
Tang Yuantian 01f2901a26 ahci: qoriq: report error when ecc register address is missing in dts 
For ls1021a, and armv8 chasis 2 socs, sata ecc must be disabled.
If ecc register is not found in sata node in dts, report error.

This is a chip erratum described as bellow:
The Read DMA operations get early termination indication from the
controller. This issue is observed as CRC error in the status registers.
The issue is due to address collision at address 0 in the dual port
memory. The read is a dummy read to flush out the header, but due to
collision the controller logs the mbit error reported by the ECC check
logic. This results in the early termination of the Read DMA operation
by the controller. The issue happens to all the interface
speeds(GEN1/2/3) for all the products.

Workaround:
Disable ECC feature on those platforms.

Signed-off-by: Tang Yuantian <yuantian.tang@nxp.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2017-01-20 08:31:14 -05:00
Tang Yuantian 386dc3b87a ahci: qoriq: added a condition to enable dma coherence 
Enable DMA coherence in SATA controller on condition that
dma-coherent property exists in sata node in DTS.

Signed-off-by: Tang Yuantian <yuantian.tang@nxp.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2017-01-20 08:31:14 -05:00
Tejun Heo d4ae1e2648 Revert "libata: switch to dynamic allocation instead of ata_scsi_rbuf" 
This reverts commit a234f7395c.

The commit tried to get rid of the shared global SCSI response buffer.
Unfortunately, it added blocking allocation to atomic path.  Revert it
for now.

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Christoph Hellwig <hch@lst.de>
 2017-01-18 11:15:29 -08:00
Arnd Bergmann d7969f5976 ahci: imx: fix building without hwmon or thermal 
When CONFIG_HWMON is disabled, we now get a link failure:

ERROR: "devm_hwmon_device_register_with_groups" [drivers/ata/ahci_imx.ko] undefined!
drivers/ata/ahci_imx.o: In function `imx_ahci_probe':
ahci_imx.c:(.text.imx_ahci_probe+0x304): undefined reference to `devm_thermal_zone_of_sensor_register'

This makes the code calling into the hwmon subsystem compile-time
conditional, and adds a Kconfig dependency to avoid the corner
case of having HWMON=m and AHCI_IMX=y, by forcing AHCI_IMX=m in this
case. The thermal subsystem already has a check in its header, but
that also doesn't cover the THERMAL=m case, so we need a somewhat
complex Kconfig expression to handle all cases.

Fixes: 54643a83b4 ("ahci: imx: Add imx53 SATA temperature sensor support")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Reviewed-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2017-01-15 18:51:12 -05:00
Bartlomiej Zolnierkiewicz 7e11aabd48 ata: add Atari Falcon PATA controller driver 
Add Atari Falcon PATA controller driver.  The major difference
when compared to legacy IDE's falconide host driver is that we
are using polled PIO mode and thus avoiding the need for STDMA
locking magic altogether.

Tested under ARAnyM emulator.

Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2017-01-10 11:11:18 -05:00
Bartlomiej Zolnierkiewicz 989e0aac1a ata: pass queued command to ->sff_data_xfer method 
For Atari Falcon PATA support we need to check the current command
in its ->sff_data_xfer method.  Update core code and all users
accordingly.

There should be no functional changes caused by this patch.

Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2017-01-10 11:11:17 -05:00
Bartlomiej Zolnierkiewicz 7563f62546 ata: allow subsystem to be used on m68k arch 
When libata was merged m68k lacked IOMAP support.  This has not been
true for a long time now so allow subsystem to be used on m68k.

Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2017-01-10 11:11:17 -05:00
Christoph Hellwig a234f7395c libata: switch to dynamic allocation instead of ata_scsi_rbuf 
Note of the emulated commands in the pageout/pagein path, so just do
a GFP_NOIO dynamic allocation.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2017-01-10 11:05:21 -05:00
Christoph Hellwig a0c0b0e945 libata: don't call ata_scsi_rbuf_fill for command without a response buffer 
No need to copy a zeroed buffer to the caller if the command is defined
to not have a response in the SCSI spec.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2017-01-10 10:55:40 -05:00
Christoph Hellwig 8fc6c0657b libata: call ->scsi_done from ata_scsi_simulate 
We always need to call ->scsi_done after we've finished emulating a
command, so do it in a single place at the end of ata_scsi_simulate.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2017-01-10 10:55:40 -05:00
Christoph Hellwig 506db3609c libata: remove the done callback from ata_scsi_args 
It's always the scsi_done callback, and we can get at that easily
in the place where ->done is called.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2017-01-10 10:55:40 -05:00
Christoph Hellwig f0a37d12f5 libata: move struct ata_scsi_args to libata-scsi.c 
It's only used in libata-scsi.c, so move it closer to the users.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2017-01-10 10:55:39 -05:00
Christoph Hellwig aa18da8b7e libata: avoid global response buffer in atapi_qc_complete 
We only need to look at 4 bytes of the inquiry response for ATAPI
devices.  Instead of using the global ata_scsi_rbuf just use a
a stack buffer.  Also factor the fixup into it's own little helper
function to make it more readable.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2017-01-10 10:55:38 -05:00
Geert Uytterhoeven fb1b8b1175 libata-eh: Use switch() instead of sparse array for protocol strings 
Replace the sparse 256-pointer array for looking up protocol strings by
a switch() statement to reduce kernel size.

According to bloat-o-meter, this saves 910 bytes on m68k (32-bit), and
1892 bytes on arm64 (64-bit).

Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2017-01-09 10:22:21 -05:00
Andy Shevchenko 368e5fbdfc ata: sata_mv: Convert to devm_ioremap_resource() 
Convert to devm_ioremap_resource() which provides more consistent error
handling.

Note that devm_ioremap_resource() provides its own error messages.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2017-01-09 07:41:27 -05:00
Tejun Heo 0fe4618d3b Merge branch 'for-4.10-fixes' into for-4.11 2017-01-09 07:38:25 -05:00
Arvind Yadav 064c3db9c5 ata: sata_mv:- Handle return value of devm_ioremap. 
Here, If devm_ioremap will fail. It will return NULL.
Then hpriv->base = NULL - 0x20000; Kernel can run into
a NULL-pointer dereference. This error check will avoid
NULL pointer dereference.

Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: stable@vger.kernel.org
 2017-01-06 15:45:32 -05:00
Damien Le Moal 2dae99558e libata: Fix ATA request sense 
For an ATA device supporting the sense data reporting feature set, a
failed command will trigger the execution of ata_eh_request_sense if
the result task file of the failed command has the ATA_SENSE bit set
(sense data available bit). ata_eh_request_sense executes the REQUEST
SENSE DATA EXT command to retrieve the sense data of the failed
command. On success of REQUEST SENSE DATA EXT, the ATA_SENSE bit will
NOT be set (the command succeeded) but ata_eh_request_sense
nevertheless tests the availability of sense data by testing that bit
presence in the result tf of the REQUEST SENSE DATA EXT command.  This
leads us to falsely assume that request sense data failed and to the
warning message:

atax.xx: request sense failed stat 50 emask 0

Upon success of REQUEST SENSE DATA EXT, set the ATA_SENSE bit in the
result task file command so that sense data can be returned by
ata_eh_request_sense.

Signed-off-by: Damien Le Moal <damien.lemoal@wdc.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: stable@vger.kernel.org
 2017-01-06 15:41:27 -05:00
Uwe Kleine-König 88af4bbd8f ata: sata_mv: fix module license specification 
The header allows GPL v2 only, so declare "GPL v2" for MODULE_LICENSE

Signed-off-by: Uwe Kleine-König <uwe@kleine-koenig.org>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2017-01-06 15:40:31 -05:00
Csaba Kertesz 54643a83b4 ahci: imx: Add imx53 SATA temperature sensor support 
Add a hwmon entry to get the temperature from the die of imx53
SATA.

The original patch was made by Richard Zhu for kernel 2.6.x:
ENGR00134041-MX53-Add-the-SATA-AHCI-temperature-monitor.patch

Signed-off-by: Fabien Lahoudere <fabien.lahoudere@collabora.co.uk>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2017-01-06 15:35:17 -05:00
Tejun Heo e0edc8c546 libata: apply MAX_SEC_1024 to all CX1-JB*-HP devices 
Marko reports that CX1-JB512-HP shows the same timeout issues as
CX1-JB256-HP.  Let's apply MAX_SEC_128 to all devices in the series.

Signed-off-by: Tejun Heo <tj@kernel.org>
Reported-by: Marko Koski-Vähälä <marko@koski-vahala.com>
Cc: stable@vger.kernel.org # v3.19+
 2017-01-06 11:50:07 -05:00
Michał Kępień de2518201e ata: ahci_xgene: free structure returned by acpi_get_object_info() 
acpi_get_object_info() allocates the returned structure, which the
caller has to free when the call succeeds.  Free it when appropriate.

Fixes: c9802a4be6 ("ata: ahci_xgene: Add AHCI Support for 2nd HW version of APM X-Gene SoC AHCI SATA Host controller.")
Signed-off-by: Michał Kępień <kernel@kempniu.pl>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2017-01-06 11:39:14 -05:00
Geert Uytterhoeven 2874d5ee6c libata: Protect DMA core code by #ifdef CONFIG_HAS_DMA 
If NO_DMA=y:

    ERROR: "bad_dma_ops" [drivers/ata/libata.ko] undefined!

To fix this, protect the DMA code by #ifdef CONFIG_HAS_DMA, and provide
dummies of ata_sg_clean() and ata_sg_setup() for the !CONFIG_HAS_DMA
case.

Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2017-01-06 11:32:44 -05:00
Geert Uytterhoeven 6cf32ed9ee libata: Make ata_sg_clean() static again 
Commit 70e6ad0c6d ("[PATCH] libata: prepare ata_sg_clean() for
invocation from EH") made ata_sg_clean() global, but no user outside
libata-core.c has ever materialized.

Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2017-01-06 11:32:44 -05:00
Geert Uytterhoeven b16a0168c4 ata: AHCI and other non-SFF native drivers should depend on HAS_DMA 
If NO_DMA=y:

    ERROR: "bad_dma_ops" [drivers/ata/libahci_platform.ko] undefined!
    ERROR: "dmam_alloc_coherent" [drivers/ata/libahci.ko] undefined!

Add a block dependency on HAS_DMA to fix this.

Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2017-01-06 11:32:43 -05:00
Geert Uytterhoeven 7bc7ab1e63 ata: ATA_BMDMA should depend on HAS_DMA 
If NO_DMA=y:

    ERROR: "dmam_alloc_coherent" [drivers/ata/libata.ko] undefined!

Add a dependency on HAS_DMA to fix this.

Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2017-01-06 11:32:43 -05:00
Geert Uytterhoeven 2a736e0585 ata: SATA_HIGHBANK should depend on HAS_DMA 
If NO_DMA=y:

    ERROR: "bad_dma_ops" [drivers/ata/sata_highbank.ko] undefined!

Add a dependency on HAS_DMA to fix this.

Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2017-01-06 11:32:43 -05:00
Geert Uytterhoeven 62989cebd3 ata: SATA_MV should depend on HAS_DMA 
If NO_DMA=y:

    ERROR: "dma_pool_alloc" [drivers/ata/sata_mv.ko] undefined!
    ERROR: "dmam_pool_create" [drivers/ata/sata_mv.ko] undefined!
    ERROR: "dma_pool_free" [drivers/ata/sata_mv.ko] undefined!

Add a dependency on HAS_DMA to fix this.

Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2017-01-06 11:32:43 -05:00
Linus Torvalds 7b882cb800 Merge branch 'for-4.10' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/libata 
Pull another libata patch from Tejun Heo:
 "One more patch from Adam added.

  It makes libata skip probing for NCQ prio unless the feature is
  explicitly requested by the user. This is necessary because some
  controllers lock up after the optional feature is probed"

* 'for-4.10' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/libata:
  ata: avoid probing NCQ Prio Support if not explicitly requested
 2016-12-13 15:30:50 -08:00
Adam Manzanares 9f56eca3ae ata: avoid probing NCQ Prio Support if not explicitly requested 
Previously, when the ata device was being initialized we were
probing for NCQ prio support by checking the identify information
and also checking the log page that holds information about ncq prio
support.

This caused an error on an Intel HBA so the code is now updated to
only probe for NCQ prio support when the sysfs variable controlling
NCQ prio support is enabled.

tj: Update formatting, switch to spin_[un]lock_irq() and update
    locking a bit, use REVALIDATE instead of RESET, and return -EIO
    instead of -EINVAL on config failure.

Signed-off-by: Adam Manzanares <adam.manzanares@wdc.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2016-12-13 17:20:17 -05:00
Linus Torvalds b92e09bb5b Merge branch 'for-4.10' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/libata 
Pull libata updates from Tejun Heo:

 - Adam added opt-in ATA command priority support.

 - There are machines which hide multiple nvme devices behind an ahci
   BAR. Dan Williams proposed a solution to force-switch the mode but
   deemed too hackishd. People are gonna discuss the proper way to
   handle the situation in nvme standard meetings. For now, detect and
   warn about the situation.

 - Low level driver specific changes.

Christoph Hellwig pipes in about the hidden nvme warning:
 "I wish that was the case. We've pretty much agreed that we'll want to
  implement it as a virtual PCIe root bridge, similar to Intels other
  'innovation' VMD that we work around that way.

  But Intel management has apparently decided that they don't want to
  spend more cycles on this now that Lenovo has an optional BIOS that
  doesn't force this broken mode anymore, and no one outside of Intel
  has enough information to implement something like this.

  So for now I guess this warning is it, until Intel reconsideres and
  spends resources on fixing up the damage their Chipset people caused"

* 'for-4.10' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/libata:
  ahci: warn about remapped NVMe devices
  ahci-remap.h: add ahci remapping definitions
  nvme: move NVMe class code to pci_ids.h
  pata: imx: support controller modes up to PIO4
  pata: imx: add support of setting timings for PIO modes
  pata: imx: set controller PIO mode with .set_piomode callback
  pata: imx: sort headers out
  ata: set ncq_prio_enabled iff device has support
  ata: ATA Command Priority Disabled By Default
  ata: Enabling ATA Command Priorities
  block: Add iocontext priority to request
  ahci: qoriq: added ls1046a platform support
 2016-12-13 13:26:24 -08:00
Linus Torvalds e7aa8c2eb1 These are the documentation changes for 4.10. 
It's another busy cycle for the docs tree, as the sphinx conversion
 continues.  Highlights include:
 
  - Further work on PDF output, which remains a bit of a pain but should be
    more solid now.
 
  - Five more DocBook template files converted to Sphinx.  Only 27 to go...
    Lots of plain-text files have also been converted and integrated.
 
  - Images in binary formats have been replaced with more source-friendly
    versions.
 
  - Various bits of organizational work, including the renaming of various
    files discussed at the kernel summit.
 
  - New documentation for the device_link mechanism.
 
 ...and, of course, lots of typo fixes and small updates.
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Merge tag 'docs-4.10' of git://git.lwn.net/linux

Pull documentation update from Jonathan Corbet:
 "These are the documentation changes for 4.10.

  It's another busy cycle for the docs tree, as the sphinx conversion
  continues. Highlights include:

   - Further work on PDF output, which remains a bit of a pain but
     should be more solid now.

   - Five more DocBook template files converted to Sphinx. Only 27 to
     go... Lots of plain-text files have also been converted and
     integrated.

   - Images in binary formats have been replaced with more
     source-friendly versions.

   - Various bits of organizational work, including the renaming of
     various files discussed at the kernel summit.

   - New documentation for the device_link mechanism.

  ... and, of course, lots of typo fixes and small updates"

* tag 'docs-4.10' of git://git.lwn.net/linux: (193 commits)
  dma-buf: Extract dma-buf.rst
  Update Documentation/00-INDEX
  docs: 00-INDEX: document directories/files with no docs
  docs: 00-INDEX: remove non-existing entries
  docs: 00-INDEX: add missing entries for documentation files/dirs
  docs: 00-INDEX: consolidate process/ and admin-guide/ description
  scripts: add a script to check if Documentation/00-INDEX is sane
  Docs: change sh -> awk in REPORTING-BUGS
  Documentation/core-api/device_link: Add initial documentation
  core-api: remove an unexpected unident
  ppc/idle: Add documentation for powersave=off
  Doc: Correct typo, "Introdution" => "Introduction"
  Documentation/atomic_ops.txt: convert to ReST markup
  Documentation/local_ops.txt: convert to ReST markup
  Documentation/assoc_array.txt: convert to ReST markup
  docs-rst: parse-headers.pl: cleanup the documentation
  docs-rst: fix media cleandocs target
  docs-rst: media/Makefile: reorganize the rules
  docs-rst: media: build SVG from graphviz files
  docs-rst: replace bayer.png by a SVG image
  ...
 2016-12-12 21:58:13 -08:00
Nicolai Stange e185934ff9 libata-scsi: disable SCT Write Same for the moment 
SCT Write Same support had been introduced with
commit 7b20309428 ("libata: Add support for SCT Write Same")

Some problems, namely excessive userspace segfaults, had been reported at

  http://lkml.kernel.org/r/20160908192736.GA4356@gmail.com

This lead to commit 0ce1b18c42 ("libata: Some drives failing on
SCT Write Same") which strived to disable SCT Write Same on !ZAC devices.
Due to the way this was done and to the logic in sd_config_write_same(),
this didn't work for those devices that have
->max_ws_blocks > SD_MAX_WS10_BLOCKS: for these, ->no_write_same and
->max_write_same_sectors would still be non-zero,
but ->ws10 == ->ws16 == 0. This would cause sd_setup_write_same_cmnd() to
demultiplex REQ_OP_WRITE_SAME requests to WRITE_SAME, and these in turn
aren't supported by libata-scsi:

  EXT4-fs (dm-1): Delayed block allocation failed for inode 2625094 at
                  logical offset 2032 with max blocks 2 with error 121
  EXT4-fs (dm-1): This should not happen!! Data will be lost

121 == EREMOTEIO is what scsi_io_completion() asserts in case of
invalid opcodes.

Back to the original problem of userspace segfaults: this can be tracked
down to ata_format_sct_write_same() overwriting the input page. Sometimes,
this page is ZERO_PAGE(0) which ceases to be filled with zeros from that
point on. Since ZERO_PAGE(0) is used for userspace .bss mappings, code of
the following is doomed:

  static char *a = NULL; /* .bss */
  ...
  if (a)
    *a = 'a';

This problem is not solved by disabling SCT Write Same for !ZAC devices
only.

It can certainly be fixed, but the final release is quite close -- so
disable SCT Write Same for all ATA devices rather than introducing some
SCT key buffer allocation schemes at this point.

Fixes: 7b20309428 ("libata: Add support for SCT Write Same")
Signed-off-by: Nicolai Stange <nicstange@gmail.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2016-12-07 16:29:09 -05:00
Christoph Hellwig aecec8b604 ahci: warn about remapped NVMe devices 
Some Intel ahci implementations have a completely broken remapping mode
where they hide one or more NVMe devices behind the bar of an AHCI device.

Intel refuses to let the OS reprogram the BIOS to switch out of this
mode at runtime, and so far we're not come up with another good way
to undo the mess that the Chipset people created.  So for now the only
thing we can do is to alert users about this situation and switch to the
faster and much saner so called "AHCI" mode insted of the RAID mode in
the BIOS so that the BIOS does not hide the NVMe devices from us.

The sitation is even worse as at least one vendor (thanks a lot Lenovo..)
has started hardcoding their BIOS into the "RAID" mode even for laptops
that don't use AHCI _at all_ and just have a single NVMe device.  For now
there is an unspported Linux-only BIOS that undoes this braindamage,
but we'll have to see if things are getting better or worse from here.

Based on an earlier patch from Dan Williams <dan.j.williams@intel.com>.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2016-12-05 14:31:24 -05:00
Uwe Kleine-König 5c3ef39738 ata: sata_mv: check for errors when parsing nr-ports from dt 
If the nr-ports property is missing ata_host_alloc_pinfo is called with
n_ports = 0. This results in host->ports[0] = NULL which later makes
mv_init_host() oops when dereferencing this pointer.

Instead be a bit more cooperative and fail the probing with an error
message.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2016-11-29 11:35:06 -05:00
Christoph Hellwig 6929ef385e ahci: always fall back to single-MSI mode 
Don't try to guess what the errors from pci_irq_alloc_vectors mean, as
that's too fragile.  Instead always try allocating a single vector
when multi-MSI mode fails.  This makes various intel Desktop and
Laptop CPUs use MSI again.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reported-by: Michael Marley <michael@michaelmarley.com>
Tested-by: Michael Marley <michael@michaelmarley.com>
Fixes: 0b9e2988ab ("ahci: use pci_alloc_irq_vectors")
Signed-off-by: Tejun Heo <tj@kernel.org>
 2016-11-21 11:06:57 -05:00
Jonathan Corbet 917fef6f7e Linux 4.9-rc4 
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Merge tag 'v4.9-rc4' into sound

Bring in -rc4 patches so I can successfully merge the sound doc changes.
 2016-11-18 16:13:41 -07:00
Vladimir Zapolskiy b986723c4c pata: imx: support controller modes up to PIO4 
Having timing settings for all supported by the controller PIO modes
now it is possible to expand its PIO mask.

Signed-off-by: Vladimir Zapolskiy <vz@mleia.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2016-11-09 11:48:58 -05:00
Vladimir Zapolskiy fab43e1434 pata: imx: add support of setting timings for PIO modes 
The controller is capable to operate in up to PIO4 mode, however
before the change the driver relies on timing settings done by
a bootloader for PIO0 mode only. The change adds more flexibility
in PIO mode selection at runtime and makes the driver to work even if
bootloader does not preset ATA timings.

Signed-off-by: Vladimir Zapolskiy <vz@mleia.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2016-11-09 11:48:57 -05:00
Vladimir Zapolskiy 65a443ea54 pata: imx: set controller PIO mode with .set_piomode callback 
Convert .set_mode callback function to more specific .set_piomode,
the driver does not have support of DMA modes, thus a simpler version
of the callback is preferred.

Signed-off-by: Vladimir Zapolskiy <vz@mleia.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2016-11-09 11:48:56 -05:00
Vladimir Zapolskiy 07b9733fda pata: imx: sort headers out 
Put headers in alphabetic order and remove redundant ones.

Signed-off-by: Vladimir Zapolskiy <vz@mleia.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2016-11-09 11:48:55 -05:00
Hannes Reinecke e0029dcb5b libata-scsi: Fixup ata_gen_passthru_sense() 
There's a typo in ata_gen_passthru_sense(), where the first byte
would be overwritten incorrectly later on.

Reported-by: Charles Machalow <csm10495@gmail.com>
Signed-off-by: Hannes Reinecke <hare@suse.com>
Fixes: 11093cb1ef ("libata-scsi: generate correct ATA pass-through sense")
Cc: stable@vger.kernel.org # v4.7+
Signed-off-by: Tejun Heo <tj@kernel.org>
 2016-11-01 11:30:15 -06:00
Christoph Hellwig 0ce57f8af1 ahci: fix the single MSI-X case in ahci_init_one 
We need to make sure hpriv->irq is set properly if we don't use per-port
vectors, so switch from blindly assigning pdev->irq to using
pci_irq_vector, which handles all interrupt types correctly.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reported-by: Robert Richter <robert.richter@cavium.com>
Tested-by: Robert Richter <robert.richter@cavium.com>
Tested-by: David Daney <ddaney.cavm@gmail.com>
Fixes: 0b9e2988ab ("ahci: use pci_alloc_irq_vectors")
Signed-off-by: Tejun Heo <tj@kernel.org>
 2016-10-25 11:43:07 -04:00
Mauro Carvalho Chehab 8c27ceff36 docs: fix locations of several documents that got moved 
The previous patch renamed several files that are cross-referenced
along the Kernel documentation. Adjust the links to point to
the right places.

Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
 2016-10-24 08:12:35 -02:00
Christoph Hellwig a478b09747 ahci: fix nvec check 
commit 17a51f12 ("ahci: only try to use multi-MSI mode if there is more
than 1 port") lead to a case where nvec isn't initialized before it's
used.  Fix this by moving the check into the n_ports conditional.

Reported-and-reviewed-by Colin Ian King <colin.king@canonical.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2016-10-20 13:40:14 -04:00
Adam Manzanares 4e647d960c ata: set ncq_prio_enabled iff device has support 
We previously had a check to see if the device has support for
prioritized ncq commands and a check to see if a device flag
is set, through a sysfs variable, in order to send a prioritized
command.

This patch only allows the sysfs variable to be set if the device
supports prioritized commands enabling one check in ata_build_rw_tf
in order to determine whether or not to send a prioritized command.

This patch depends on ata: ATA Command Priority Disabled By Default

tj: Minor subject and formatting updates.

Signed-off-by: Adam Manzanares <adam.manzanares@wdc.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2016-10-20 10:06:30 -04:00
Adam Manzanares 84f95243b5 ata: ATA Command Priority Disabled By Default 
Add a sysfs entry to turn on priority information being passed
to a ATA device. By default this feature is turned off.

This patch depends on ata: Enabling ATA Command Priorities

tj: Renamed ncq_prio_on to ncq_prio_enable and removed trivial
    ata_ncq_prio_on() and open-coded the test.

Signed-off-by: Adam Manzanares <adam.manzanares@hgst.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2016-10-19 14:34:36 -04:00
Adam Manzanares 8e061784b5 ata: Enabling ATA Command Priorities 
This patch checks to see if an ATA device supports NCQ command priorities.
If so and the user has specified an iocontext that indicates
IO_PRIO_CLASS_RT then we build a tf with a high priority command.

This is done to improve the tail latency of commands that are high
priority by passing priority to the device.

tj: Removed trivial ata_ncq_prio_enabled() and open-coded the test.

Signed-off-by: Adam Manzanares <adam.manzanares@hgst.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2016-10-19 14:34:36 -04:00
Tang Yuantian 2facc6dacc ahci: qoriq: added ls1046a platform support 
Ls1046a is a new introduced soc which supports ATA3.0.

Signed-off-by: Tang Yuantian <yuantian.tang@nxp.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2016-10-19 13:33:01 -04:00
Christoph Hellwig 17a51f12cf ahci: only try to use multi-MSI mode if there is more than 1 port 
We should only try to allocate multiple MSI or MSI-X vectors if the device
actually has multiple ports.  Otherwise pci_alloc_irq_vectors will return
a single vector due to n_ports = 1, in which case we shouldn't set the
AHCI_HFLAG_MULTI_MSI flag.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Fixes: 0b9e2988 ("ahci: use pci_alloc_irq_vectors")
Reported-by: Emmanuel Benisty <benisty.e@gmail.com>
Tested-by: Emmanuel Benisty <benisty.e@gmail.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2016-10-19 13:18:16 -04:00
Tang Yuantian 1ce788d242 ahci: qoriq: Revert "ahci: qoriq: Disable NCQ on ls2080a SoC" 
This reverts commit 640847298e ("ahci: qoriq: Disable NCQ
on ls2080a SoC")

The erratum has been fixed in ls2080a v2.0 and later soc.
In reality, customer will not get any ls2080a v1.0 soc. Neither apply
to any products. So reverting this commit won't create any side effect.

Blacklisting v2.0 could also be a option, but that needs to check the
soc version which is not suitable in the driver.

Signed-off-by: Tang Yuantian <yuantian.tang@nxp.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2016-09-30 10:28:51 +02:00
Harman Kalra 70a19b7e40 pata_at91: Use PTR_ERR_OR_ZERO rather than if(IS_ERR(...)) + PTR_ERR 
Signed-off-by: Harman Kalra <harman4linux@gmail.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2016-09-22 11:48:46 -04:00
Harman Kalra 02d9d3cbac ata: Replace BUG() with BUG_ON(). 
Replace BUG() with BUG_ON().
Caught by coccinelle.

Signed-off-by: Harman Kalra <harman4linux@gmail.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2016-09-22 11:46:52 -04:00
Harman Kalra 6ec76070f1 ata: sata_mv: Replacing dma_pool_alloc and memset with a single call dma_pool_zalloc. 
Replacing dma_pool_alloc and memset with a single call to dma_pool_zalloc

Signed-off-by: Harman Kalra <harman4linux@gmail.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2016-09-20 16:07:16 -04:00
Shaun Tancheff 0ce1b18c42 libata: Some drives failing on SCT Write Same 
Restrict support SCT Write Same to devices which also support ZAC where
support is required.

Reported-by: Mike Krinkin <krinkin.m.u@gmail.com>
Signed-off-by: Shaun Tancheff <shaun.tancheff@seagate.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2016-09-09 15:21:21 -04:00
Christoph Hellwig 0b9e2988ab ahci: use pci_alloc_irq_vectors 
Use the new pci_alloc_irq_vectors API to allocate MSI-X and MSI vectors.
The big advantage over the old code is that we can use the same API for
MSI and MSI-X, and that we don't need to store the MSI-X vector mapping
in driver-private data structures.

This first conversion keeps the probe order as-is: MSI-X multi vector,
MSI multi vector, MSI single vector, MSI-X single vector and last a
single least legacy interrupt line.  There is one small change of
behavior: we now check the "MSI Revert to Single Message" flag for
MSI-X in addition to MSI.

Because the API to find the Linux IRQ number for a MSI/MSI-X vector
is PCI specific, but libahaci is bus-agnostic I had to a
get_irq_vector function pointer to struct ahci_host_priv.  The
alternative would be to move the multi-vector case of ahci_host_activate
to ahci.c and just call ata_host_activate directly from the others
users of ahci_host_activate.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2016-09-06 12:38:17 -04:00
Tejun Heo 2536524a91 Merge branch 'master' into for-4.9 2016-09-06 12:35:56 -04:00
Alan Cox 9ebae9e4bc pata_ninja32: Avoid corrupting status flags 
Ninja32 needs to set some flags to indicate it does 32bit IO. However it currently assigns this which
loses the initializing flag and causes a warning spew. Fix it to use a logical or as is intended.

Signed-off-by: Alan Cox <alan@linux.intel.com>
Tested-by: Ellmar Stelnberger <estellnb@elstel.org>
Signed-off-by: Tejun Heo <tj@kernel.org>
 2016-08-30 11:59:47 -04:00
Shaun Tancheff 7d36dd00ab libata: SCT Write Same handle ATA_DFLAG_PIO 
Use non DMA write log when ATA_DFLAG_PIO is set.

Signed-off-by: Shaun Tancheff <shaun.tancheff@seagate.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Acked-by: Tejun Heo <tj@kernel.org>
 2016-08-25 11:26:48 -04:00