Граф коммитов

191 Коммитов

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Thomas Perrot 1dba0075fc bus: mhi: pci_generic: Introduce Sierra EM919X support
Add support for EM919X modems, this modem series is based on SDX55
qcom chip.

It is mandatory to use the same ring for control+data and diag events.

Link: https://lore.kernel.org/r/20211123081541.648426-1-thomas.perrot@bootlin.com
Tested-by: Aleksander Morgado <aleksander@aleksander.es>
Reviewed-by: Manivannan Sadhasivam <mani@kernel.org>
Signed-off-by: Thomas Perrot <thomas.perrot@bootlin.com>
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Link: https://lore.kernel.org/r/20211216081227.237749-11-manivannan.sadhasivam@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-12-17 17:17:15 +01:00
Kees Cook 5a717e9323 bus: mhi: core: Use correctly sized arguments for bit field
The find.h APIs are designed to be used only on unsigned long arguments.
This can technically result in a over-read, but it is harmless in this
case. Regardless, fix it to avoid the warning seen under -Warray-bounds,
which we'd like to enable globally:

In file included from ./include/linux/bitmap.h:9,
                 from ./include/linux/cpumask.h:12,
                 from ./arch/x86/include/asm/cpumask.h:5,
                 from ./arch/x86/include/asm/msr.h:11,
                 from ./arch/x86/include/asm/processor.h:22,
                 from ./arch/x86/include/asm/cpufeature.h:5,
                 from ./arch/x86/include/asm/thread_info.h:53,
                 from ./include/linux/thread_info.h:60,
                 from ./arch/x86/include/asm/preempt.h:7,
                 from ./include/linux/preempt.h:78,
                 from ./include/linux/spinlock.h:55,
                 from ./include/linux/wait.h:9,
                 from ./include/linux/wait_bit.h:8,
                 from ./include/linux/fs.h:6,
                 from ./include/linux/debugfs.h:15,
                 from drivers/bus/mhi/core/init.c:7:
drivers/bus/mhi/core/init.c: In function 'to_mhi_pm_state_str':
./include/linux/find.h:187:37: warning: array subscript 'long unsigned int[0]' is partly outside array bounds of 'enum mhi_pm_state[1]' [-Warray-bounds]
  187 |                 unsigned long val = *addr & GENMASK(size - 1, 0);
      |                                     ^~~~~
drivers/bus/mhi/core/init.c:80:51: note: while referencing 'state'
   80 | const char *to_mhi_pm_state_str(enum mhi_pm_state state)
      |                                 ~~~~~~~~~~~~~~~~~~^~~~~

Link: https://lore.kernel.org/r/20211215232446.2069794-1-keescook@chromium.org
[mani: changed the variable name "bits" to "pm_state"]
Reviewed-by: Manivannan Sadhasivam <mani@kernel.org>
Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Link: https://lore.kernel.org/r/20211216081227.237749-10-manivannan.sadhasivam@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-12-17 17:17:14 +01:00
Manivannan Sadhasivam 227fee5fc9 bus: mhi: core: Add an API for auto queueing buffers for DL channel
Add a new API "mhi_prepare_for_transfer_autoqueue" for using with client
drivers like QRTR to request MHI core to autoqueue buffers for the DL
channel along with starting both UL and DL channels.

So far, the "auto_queue" flag specified by the controller drivers in
channel definition served this purpose but this will be removed at some
point in future.

Cc: netdev@vger.kernel.org
Cc: Jakub Kicinski <kuba@kernel.org>
Cc: David S. Miller <davem@davemloft.net>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Co-developed-by: Loic Poulain <loic.poulain@linaro.org>
Acked-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Loic Poulain <loic.poulain@linaro.org>
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Link: https://lore.kernel.org/r/20211216081227.237749-9-manivannan.sadhasivam@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-12-17 17:17:14 +01:00
Manivannan Sadhasivam d651ce8e91 bus: mhi: core: Fix race while handling SYS_ERR at power up
During SYS_ERR condition, as a response to the MHI_RESET from host, some
devices tend to issue BHI interrupt without clearing the SYS_ERR state in
the device. This creates a race condition and causes a failure in booting
up the device.

The issue is seen on the Sierra Wireless EM9191 modem during SYS_ERR
handling in mhi_async_power_up(). Once the host detects that the device
is in SYS_ERR state, it issues MHI_RESET and waits for the device to
process the reset request. During this time, the device triggers the BHI
interrupt to the host without clearing SYS_ERR condition. So the host
starts handling the SYS_ERR condition again.

To fix this issue, let's register the IRQ handler only after handling the
SYS_ERR check to avoid getting spurious IRQs from the device.

Fixes: e18d4e9fa7 ("bus: mhi: core: Handle syserr during power_up")
Cc: stable@vger.kernel.org
Reported-by: Aleksander Morgado <aleksander@aleksander.es>
Tested-by: Aleksander Morgado <aleksander@aleksander.es>
Tested-by: Thomas Perrot <thomas.perrot@bootlin.com>
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Link: https://lore.kernel.org/r/20211216081227.237749-8-manivannan.sadhasivam@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-12-17 17:17:14 +01:00
Bhaumik Bhatt 42c4668f7e bus: mhi: core: Fix reading wake_capable channel configuration
The 'wake-capable' entry in channel configuration is not set when
parsing the configuration specified by the controller driver. Add
the missing entry to ensure channel is correctly specified as a
'wake-capable' channel.

Link: https://lore.kernel.org/r/1638320491-13382-1-git-send-email-quic_bbhatt@quicinc.com
Fixes: 0cbf260820 ("bus: mhi: core: Add support for registering MHI controllers")
Cc: stable@vger.kernel.org
Reviewed-by: Manivannan Sadhasivam <mani@kernel.org>
Signed-off-by: Bhaumik Bhatt <quic_bbhatt@quicinc.com>
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Link: https://lore.kernel.org/r/20211216081227.237749-7-manivannan.sadhasivam@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-12-17 17:17:14 +01:00
Christophe JAILLET f3d1339736 bus: mhi: pci_generic: Simplify code and axe the use of a deprecated API
The wrappers in include/linux/pci-dma-compat.h should go away.

Replace 'pci_set_dma_mask/pci_set_consistent_dma_mask' by an equivalent
and less verbose 'dma_set_mask_and_coherent()' call.

Link: https://lore.kernel.org/r/bb3dc436fe142309a2334549db782c5ebb80a2be.1625718497.git.christophe.jaillet@wanadoo.fr
Reviewed-by: Hemant Kumar <hemantk@codeaurora.org>
Reviewed-by: Manivannan Sadhasivam <mani@kernel.org>
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Link: https://lore.kernel.org/r/20211216081227.237749-6-manivannan.sadhasivam@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-12-17 17:17:14 +01:00
Manivannan Sadhasivam 85ec609462 bus: mhi: core: Minor style and comment fixes
This patch fixes the below checkpatch warnings in MHI bus:

WARNING: Possible repeated word: 'events'
+	/* Process ctrl events events */

WARNING: Missing a blank line after declarations
+			struct mhi_buf_info info = { };
+			buf = kmalloc(len, GFP_KERNEL);

WARNING: Move const after static - use 'static const struct mhi_pm_transitions'
+static struct mhi_pm_transitions const dev_state_transitions[] = {

Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Link: https://lore.kernel.org/r/20211216081227.237749-5-manivannan.sadhasivam@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-12-17 17:17:14 +01:00
Bhaumik Bhatt 3e60c9f068 bus: mhi: core: Use macros for execution environment features
The implementation for execution environment specific functionality
is spread out. Use macros that help determine the paths to be taken.

Link: https://lore.kernel.org/r/1636409978-31847-1-git-send-email-quic_bbhatt@quicinc.com
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Signed-off-by: Bhaumik Bhatt <bbhatt@codeaurora.org>
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Link: https://lore.kernel.org/r/20211216081227.237749-4-manivannan.sadhasivam@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-12-17 17:17:14 +01:00
Loic Poulain f77097ec8c bus: mhi: pci_generic: Graceful shutdown on freeze
There is no reason for shutting down MHI ungracefully on freeze,
this causes the MHI host stack & device stack to not be aligned
anymore since the proper MHI reset sequence is not performed for
ungraceful shutdown.

Link: https://lore.kernel.org/r/1635268180-13699-1-git-send-email-loic.poulain@linaro.org
Fixes: 5f0c2ee1fe ("bus: mhi: pci-generic: Fix hibernation")
Cc: stable@vger.kernel.org
Suggested-by: Bhaumik Bhatt <bbhatt@codeaurora.org>
Reviewed-by: Bhaumik Bhatt <bbhatt@codeaurora.org>
Reviewed-by: Hemant Kumar <hemantk@codeaurora.org>
Reviewed-by: Manivannan Sadhasivam <mani@kernel.org>
Signed-off-by: Loic Poulain <loic.poulain@linaro.org>
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Link: https://lore.kernel.org/r/20211216081227.237749-3-manivannan.sadhasivam@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-12-17 17:17:14 +01:00
Slark Xiao c9825e6600 bus: mhi: pci_generic: Add new device ID support for T99W175
Add new device ID 0xe0bf for T99W175.
This device ID is created because it is using Qualcomm SDX55 new base line.

Test evidence as below:
root@jbd-ThinkPad-P1-Gen-4:/dev# lspci -nn | grep Foxconn
0000:08:00.0 Wireless controller [0d40]: Foxconn International, Inc. Device [105b:e0bf]
root@jbd-ThinkPad-P1-Gen-4:/dev# cat wwan0at0 & echo -ne "ati\r" > wwan0at0
[2] 2977
root@jbd-ThinkPad-P1-Gen-4:/dev# ati
Manufacturer: Qualcomm
Model: T99W175
Revision: T99W175.F0.6.0.0.6.CC.005  1  [Oct 21 2021 10:00:00]
IMEI:
+GCAP: +CGSM

OK

Link: https://lore.kernel.org/r/20211029104918.3976-1-slark_xiao@163.com
Reviewed-by: Manivannan Sadhasivam <mani@kernel.org>
Signed-off-by: Slark Xiao <slark_xiao@163.com>
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Link: https://lore.kernel.org/r/20211216081227.237749-2-manivannan.sadhasivam@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-12-17 17:17:14 +01:00
Loic Poulain cab2d3fd68 bus: mhi: core: Add support for forced PM resume
For whatever reason, some devices like QCA6390, WCN6855 using ath11k
are not in M3 state during PM resume, but still functional. The
mhi_pm_resume should then not fail in those cases, and let the higher
level device specific stack continue resuming process.

Add an API mhi_pm_resume_force(), to force resuming irrespective of the
current MHI state. This fixes a regression with non functional ath11k WiFi
after suspend/resume cycle on some machines.

Bug report: https://bugzilla.kernel.org/show_bug.cgi?id=214179

Link: https://lore.kernel.org/regressions/871r5p0x2u.fsf@codeaurora.org/
Fixes: 020d3b26c0 ("bus: mhi: Early MHI resume failure in non M3 state")
Cc: stable@vger.kernel.org #5.13
Reported-by: Kalle Valo <kvalo@codeaurora.org>
Reported-by: Pengyu Ma <mapengyu@gmail.com>
Tested-by: Kalle Valo <kvalo@kernel.org>
Acked-by: Kalle Valo <kvalo@kernel.org>
Signed-off-by: Loic Poulain <loic.poulain@linaro.org>
[mani: Switched to API, added bug report, reported-by tags and CCed stable]
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Link: https://lore.kernel.org/r/20211209131633.4168-1-manivannan.sadhasivam@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-12-09 18:47:05 +01:00
Slark Xiao e2022cbec9 bus: mhi: pci_generic: Fix device recovery failed issue
For Foxconn T99W175 device(sdx55 platform) in some host platform,
it would be unavailable once the host execute the err handler.

After checking, it's caused by the delay time too short to
get a successful reset.

Please see my test evidence as bewlow(BTW, I add some extra test logs
in function mhi_pci_reset_prepare and mhi_pci_reset_done):
  When MHI_POST_RESET_DELAY_MS equals to 500ms:
   Nov  4 14:30:03 jbd-ThinkEdge kernel: [  146.222477] mhi mhi0: Device MHI is not in valid state
   Nov  4 14:30:03 jbd-ThinkEdge kernel: [  146.222628] mhi-pci-generic 0000:2d:00.0: mhi_pci_reset_prepare reset
   Nov  4 14:30:03 jbd-ThinkEdge kernel: [  146.222631] mhi-pci-generic 0000:2d:00.0: mhi_pci_reset_prepare mhi_soc_reset
   Nov  4 14:30:03 jbd-ThinkEdge kernel: [  146.222632] mhi mhi0:  mhi_soc_reset write soc to reset
   Nov  4 14:30:05 jbd-ThinkEdge kernel: [  147.839993] mhi-pci-generic 0000:2d:00.0: mhi_pci_reset_done
   Nov  4 14:30:05 jbd-ThinkEdge kernel: [  147.902063] mhi-pci-generic 0000:2d:00.0: reset failed

  When MHI_POST_RESET_DELAY_MS equals to 1000ms or 1500ms:
   Nov  4 19:07:26 jbd-ThinkEdge kernel: [  157.067857] mhi mhi0: Device MHI is not in valid state
   Nov  4 19:07:26 jbd-ThinkEdge kernel: [  157.068029] mhi-pci-generic 0000:2d:00.0: mhi_pci_reset_prepare reset
   Nov  4 19:07:26 jbd-ThinkEdge kernel: [  157.068032] mhi-pci-generic 0000:2d:00.0: mhi_pci_reset_prepare mhi_soc_reset
   Nov  4 19:07:26 jbd-ThinkEdge kernel: [  157.068034] mhi mhi0:  mhi_soc_reset write soc to reset
   Nov  4 19:07:29 jbd-ThinkEdge kernel: [  159.607006] mhi-pci-generic 0000:2d:00.0: mhi_pci_reset_done
   Nov  4 19:07:29 jbd-ThinkEdge kernel: [  159.607152] mhi mhi0: Requested to power ON
   Nov  4 19:07:51 jbd-ThinkEdge kernel: [  181.302872] mhi mhi0: Failed to reset MHI due to syserr state
   Nov  4 19:07:51 jbd-ThinkEdge kernel: [  181.303011] mhi-pci-generic 0000:2d:00.0: failed to power up MHI controller

  When MHI_POST_RESET_DELAY_MS equals to 2000ms:
   Nov  4 17:51:08 jbd-ThinkEdge kernel: [  147.180527] mhi mhi0: Failed to transition from PM state: Linkdown or Error Fatal Detect to: SYS ERROR Process
   Nov  4 17:51:08 jbd-ThinkEdge kernel: [  147.180535] mhi mhi0: Device MHI is not in valid state
   Nov  4 17:51:08 jbd-ThinkEdge kernel: [  147.180722] mhi-pci-generic 0000:2d:00.0: mhi_pci_reset_prepare reset
   Nov  4 17:51:08 jbd-ThinkEdge kernel: [  147.180725] mhi-pci-generic 0000:2d:00.0: mhi_pci_reset_prepare mhi_soc_reset
   Nov  4 17:51:08 jbd-ThinkEdge kernel: [  147.180727] mhi mhi0:  mhi_soc_reset write soc to reset
   Nov  4 17:51:11 jbd-ThinkEdge kernel: [  150.230787] mhi-pci-generic 0000:2d:00.0: mhi_pci_reset_done
   Nov  4 17:51:11 jbd-ThinkEdge kernel: [  150.230928] mhi mhi0: Requested to power ON
   Nov  4 17:51:11 jbd-ThinkEdge kernel: [  150.231173] mhi mhi0: Power on setup success
   Nov  4 17:51:14 jbd-ThinkEdge kernel: [  153.254747] mhi mhi0: Wait for device to enter SBL or Mission mode

I also tried big data like 3000, and it worked as well. 500ms may not be
enough for all support mhi device. We shall increase it to 2000ms
at least.

Link: https://lore.kernel.org/r/20211108113127.3938-1-slark_xiao@163.com
[mani: massaged commit message little bit, added Fixes tag and CCed stable]
Fixes: 8ccc3279fc ("mhi: pci_generic: Add support for reset")
Cc: stable@vger.kernel.org
Reviewed-by: Manivannan Sadhasivam <mani@kernel.org>
Signed-off-by: Slark Xiao <slark_xiao@163.com>
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Link: https://lore.kernel.org/r/20211126104951.35685-2-manivannan.sadhasivam@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-12-03 11:42:07 +01:00
Linus Torvalds ba1dc7f273 Char / Misc driver changes for 5.15-rc1
Here is the big set of char/misc driver changes for 5.15-rc1.
 
 Lots of different driver subsystems are being updated in here, notably:
 	- mhi subsystem update
 	- fpga subsystem update
 	- coresight/hwtracing subsystem update
 	- interconnect subsystem update
 	- nvmem subsystem update
 	- parport drivers update
 	- phy subsystem update
 	- soundwire subsystem update
 and there are some other char/misc drivers being updated as well:
 	- binder driver additions
 	- new misc drivers
 	- lkdtm driver updates
 	- mei driver updates
 	- sram driver updates
 	- other minor driver updates.
 
 Note, there are no habanna labs driver updates in this pull request,
 that will probably come later before -rc1 is out in a different request.
 
 All of these have been in linux-next for a while with no reported
 problems.
 
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'char-misc-5.15-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc

Pull char / misc driver updates from Greg KH:
 "Here is the big set of char/misc driver changes for 5.15-rc1.

  Lots of different driver subsystems are being updated in here,
  notably:

   - mhi subsystem update

   - fpga subsystem update

   - coresight/hwtracing subsystem update

   - interconnect subsystem update

   - nvmem subsystem update

   - parport drivers update

   - phy subsystem update

   - soundwire subsystem update

  and there are some other char/misc drivers being updated as well:

   - binder driver additions

   - new misc drivers

   - lkdtm driver updates

   - mei driver updates

   - sram driver updates

   - other minor driver updates.

  Note, there are no habanalabs driver updates in this pull request,
  that will probably come later before -rc1 is out in a different
  request.

  All of these have been in linux-next for a while with no reported
  problems"

* tag 'char-misc-5.15-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc: (169 commits)
  Revert "bus: mhi: Add inbound buffers allocation flag"
  misc/pvpanic: fix set driver data
  VMCI: fix NULL pointer dereference when unmapping queue pair
  char: mware: fix returnvar.cocci warnings
  parport: remove non-zero check on count
  soundwire: cadence: do not extend reset delay
  soundwire: intel: conditionally exit clock stop mode on system suspend
  soundwire: intel: skip suspend/resume/wake when link was not started
  soundwire: intel: fix potential race condition during power down
  phy: qcom-qmp: Add support for SM6115 UFS phy
  dt-bindings: phy: qcom,qmp: Add SM6115 UFS PHY bindings
  phy: qmp: Provide unique clock names for DP clocks
  lkdtm: remove IDE_CORE_CP crashpoint
  lkdtm: replace SCSI_DISPATCH_CMD with SCSI_QUEUE_RQ
  coresight: Replace deprecated CPU-hotplug functions.
  Documentation: coresight: Add documentation for CoreSight config
  coresight: syscfg: Add initial configfs support
  coresight: config: Add preloaded configurations
  coresight: etm4x: Add complex configuration handlers to etmv4
  coresight: etm-perf: Update to activate selected configuration
  ...
2021-09-01 08:35:06 -07:00
Greg Kroah-Hartman 0dc3ad3f85 Revert "bus: mhi: Add inbound buffers allocation flag"
This reverts commit 0092a1e3f7

This should be reverted in the char-misc-next branch to make merging
with Linus's branch possible due to issues with the mhi code that was
found in the networking tree.

Link: https://lore.kernel.org/r/20210827175852.GB15018@thinkpad
Reported-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Bhaumik Bhatt <bbhatt@codeaurora.org>
Cc: Hemant Kumar <hemantk@codeaurora.org>
Cc: Jakub Kicinski <kuba@kernel.org>
Cc: Kalle Valo <kvalo@codeaurora.org>
Cc: Loic Poulain <loic.poulain@linaro.org>
Cc: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-08-27 21:24:09 +02:00
Jakub Kicinski 97c78d0af5 Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
drivers/net/wwan/mhi_wwan_mbim.c - drop the extra arg.

Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2021-08-26 17:57:57 -07:00
Kalle Valo 9ebc2758d0 Revert "net: really fix the build..."
This reverts commit ce78ffa3ef.

Wren and Nicolas reported that ath11k was failing to initialise QCA6390
Wi-Fi 6 device with error:

qcom_mhi_qrtr: probe of mhi0_IPCR failed with error -22

Commit ce78ffa3ef ("net: really fix the build..."), introduced in
v5.14-rc5, caused this regression in qrtr. Most likely all ath11k
devices are broken, but I only tested QCA6390. Let's revert the broken
commit so that ath11k works again.

Reported-by: Wren Turkal <wt@penguintechs.org>
Reported-by: Nicolas Schichan <nschichan@freebox.fr>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Link: https://lore.kernel.org/r/20210826172816.24478-1-kvalo@codeaurora.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2021-08-26 11:08:32 -07:00
Jakub Kicinski 0ca8d3ca45 Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
Build failure in drivers/net/wwan/mhi_wwan_mbim.c:
add missing parameter (0, assuming we don't want buffer pre-alloc).

Conflict in drivers/net/dsa/sja1105/sja1105_main.c between:
  589918df93 ("net: dsa: sja1105: be stateless with FDB entries on SJA1105P/Q/R/S/SJA1110 too")
  0fac6aa098 ("net: dsa: sja1105: delete the best_effort_vlan_filtering mode")

Follow the instructions from the commit message of the former commit
- removed the if conditions. When looking at commit 589918df93 ("net:
dsa: sja1105: be stateless with FDB entries on SJA1105P/Q/R/S/SJA1110 too")
note that the mask_iotag fields get removed by the following patch.

Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2021-08-05 15:08:47 -07:00
Bhaumik Bhatt 61106bd2a8 bus: mhi: core: Improve debug messages for power up
Improve error message to be more descriptive if a failure occurs
with an invalid power up execution environment. Additionally, add
a debug log to print the execution environment and MHI state
before a power up is attempted to confirm if the device is in an
expected state. This helps clarify reasons for power up failures
such as the device being found in a PBL or Emergency Download
Mode execution environment and the host expected a full power up
with Pass-Through and no image loading involved.

Link: https://lore.kernel.org/r/1620072038-36160-1-git-send-email-bbhatt@codeaurora.org
Reviewed-by: Hemant Kumar <hemantk@codeaurora.org>
Reviewed-by: Jeffrey Hugo <quic_jhugo@quicinc.com>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Signed-off-by: Bhaumik Bhatt <bbhatt@codeaurora.org>
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Link: https://lore.kernel.org/r/20210802051255.5771-11-manivannan.sadhasivam@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-08-05 14:28:48 +02:00
Bhaumik Bhatt 2e36190de6 bus: mhi: core: Replace DMA allocation wrappers with original APIs
There is nothing special done within the mhi_alloc_coherent() and
the mhi_free_coherent() wrapper functions. They only directly
call the equivalent DMA allocation functions. Replace them with
the original function calls such that the implementation is clear
and direct.

Link: https://lore.kernel.org/r/1624392428-9328-1-git-send-email-bbhatt@codeaurora.org
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Signed-off-by: Bhaumik Bhatt <bbhatt@codeaurora.org>
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Link: https://lore.kernel.org/r/20210802051255.5771-10-manivannan.sadhasivam@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-08-05 14:28:47 +02:00
Bhaumik Bhatt 06e2c4a9ea bus: mhi: core: Add range checks for BHI and BHIe
When obtaining the BHI or BHIe offsets during the power up
preparation phase, range checks are missing. These can help
controller drivers avoid accessing any address outside of the
MMIO region. Ensure that mhi_cntrl->reg_len is set before MHI
registration as it is a required field and range checks will
fail without it.

Link: https://lore.kernel.org/r/1620330705-40192-7-git-send-email-bbhatt@codeaurora.org
Reviewed-by: Jeffrey Hugo <quic_jhugo@quicinc.com>
Reviewed-by: Hemant Kumar <hemantk@codeaurora.org>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Signed-off-by: Bhaumik Bhatt <bbhatt@codeaurora.org>
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Link: https://lore.kernel.org/r/20210802051255.5771-9-manivannan.sadhasivam@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-08-05 14:28:47 +02:00
Bhaumik Bhatt 3551a30b9d bus: mhi: pci_generic: Set register access length for MHI driver
MHI driver requires register space length to add range checks and
prevent memory region accesses outside of that for MMIO space.
Set it from the PCI generic controller driver before registering
the MHI controller.

Link: https://lore.kernel.org/r/1620330705-40192-6-git-send-email-bbhatt@codeaurora.org
Reviewed-by: Hemant Kumar <hemantk@codeaurora.org>
Reviewed-by: Loic Poulain <loic.poulain@linaro.org>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Signed-off-by: Bhaumik Bhatt <bbhatt@codeaurora.org>
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Link: https://lore.kernel.org/r/20210802051255.5771-8-manivannan.sadhasivam@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-08-05 14:28:47 +02:00
Bhaumik Bhatt 3aa8f43b33 bus: mhi: core: Set BHI and BHIe pointers to NULL in clean-up
Set the BHI and BHIe pointers to NULL as part of clean-up. This
makes sure that stale pointers are not accessed after powering
MHI down.

Link: https://lore.kernel.org/r/1620330705-40192-3-git-send-email-bbhatt@codeaurora.org
Suggested-by: Hemant Kumar <hemantk@codeaurora.org>
Reviewed-by: Jeffrey Hugo <quic_jhugo@quicinc.com>
Reviewed-by: Hemant Kumar <hemantk@codeaurora.org>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Signed-off-by: Bhaumik Bhatt <bbhatt@codeaurora.org>
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Link: https://lore.kernel.org/r/20210802051255.5771-5-manivannan.sadhasivam@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-08-05 14:28:47 +02:00
Bhaumik Bhatt 3215d8e069 bus: mhi: core: Set BHI/BHIe offsets on power up preparation
Set the BHI and/or BHIe offsets in mhi_prepare_for_power_up(),
rearrange the function, and remove the equivalent from
mhi_async_power_up(). This helps consolidate multiple checks
in different parts of the driver and can help MHI fail early on
before power up begins if the offsets are not read correctly.

Link: https://lore.kernel.org/r/1620330705-40192-2-git-send-email-bbhatt@codeaurora.org
Reviewed-by: Jeffrey Hugo <quic_jhugo@quicinc.com>
Reviewed-by: Hemant Kumar <hemantk@codeaurora.org>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Signed-off-by: Bhaumik Bhatt <bbhatt@codeaurora.org>
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Link: https://lore.kernel.org/r/20210802051255.5771-4-manivannan.sadhasivam@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-08-05 14:28:47 +02:00
ULRICH Thomas 87693e092b bus: mhi: pci_generic: Add Cinterion MV31-W PCIe to MHI
This patch adds VendorID/ProductID and MBIM Channel Definitions for
M.2 Modem Card (PCIe Variant) to MHI PCI generic controller driver.

Cinterion MV31-W (by Thales)
Additional information on such Modem Card (USB or PCIe variant) is
available at:
https://www.thalesgroup.com/en/markets/digital-identity-and-security/iot/iot-connectivity/products/iot-products/mv31-w-ultra-high

Link: https://lore.kernel.org/r/PAZP264MB284690134DA010698E6B3BDDE60A9@PAZP264MB2846.FRAP264.PROD.OUTLOOK.COM
[mani: fixed the subject, whitespace, and added sideband_wake field]
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Signed-off-by: ULRICH Thomas <thomas.ulrich@thalesgroup.com>
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Link: https://lore.kernel.org/r/20210802051255.5771-3-manivannan.sadhasivam@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-08-05 14:28:47 +02:00
Loic Poulain 0092a1e3f7 bus: mhi: Add inbound buffers allocation flag
Currently, the MHI controller driver defines which channels should
have their inbound buffers allocated and queued. But ideally, this is
something that should be decided by the MHI device driver instead,
which actually deals with that buffers.

Add a flag parameter to mhi_prepare_for_transfer allowing to specify
if buffers have to be allocated and queued by the MHI stack.

Keep auto_queue flag for now, but should be removed at some point.

Link: https://lore.kernel.org/r/1624566520-20406-1-git-send-email-loic.poulain@linaro.org
Tested-by: Bhaumik Bhatt <bbhatt@codeaurora.org>
Reviewed-by: Bhaumik Bhatt <bbhatt@codeaurora.org>
Reviewed-by: Hemant Kumar <hemantk@codeaurora.org>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Acked-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Loic Poulain <loic.poulain@linaro.org>
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Link: https://lore.kernel.org/r/20210802051255.5771-2-manivannan.sadhasivam@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-08-05 14:28:14 +02:00
David S. Miller ce78ffa3ef net: really fix the build...
Signed-off-by: David S. Miller <davem@davemloft.net>
2021-08-03 11:14:03 +01:00
Jakub Kicinski d2e11fd2b7 Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
Conflicting commits, all resolutions pretty trivial:

drivers/bus/mhi/pci_generic.c
  5c2c853159 ("bus: mhi: pci-generic: configurable network interface MRU")
  56f6f4c4eb ("bus: mhi: pci_generic: Apply no-op for wake using sideband wake boolean")

drivers/nfc/s3fwrn5/firmware.c
  a0302ff590 ("nfc: s3fwrn5: remove unnecessary label")
  46573e3ab0 ("nfc: s3fwrn5: fix undefined parameter values in dev_err()")
  801e541c79 ("nfc: s3fwrn5: fix undefined parameter values in dev_err()")

MAINTAINERS
  7d901a1e87 ("net: phy: add Maxlinear GPY115/21x/24x driver")
  8a7b46fa79 ("MAINTAINERS: add Yasushi SHOJI as reviewer for the Microchip CAN BUS Analyzer Tool driver")

Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2021-07-31 09:14:46 -07:00
Loic Poulain b8a97f2a65 bus: mhi: pci_generic: Fix inbound IPCR channel
The qrtr-mhi client driver assumes that inbound buffers are
automatically allocated and queued by the MHI core, but this
doesn't happen for mhi pci devices since IPCR inbound channel is
not flagged with auto_queue, causing unusable IPCR (qrtr)
feature. Fix that.

Link: https://lore.kernel.org/r/1625736749-24947-1-git-send-email-loic.poulain@linaro.org
[mani: fixed a spelling mistake in commit description]
Fixes: 855a70c120 ("bus: mhi: Add MHI PCI support for WWAN modems")
Cc: stable@vger.kernel.org #5.10
Reviewed-by: Hemant kumar <hemantk@codeaurora.org>
Reviewed-by: Manivannan Sadhasivam <mani@kernel.org>
Signed-off-by: Loic Poulain <loic.poulain@linaro.org>
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Link: https://lore.kernel.org/r/20210716075106.49938-4-manivannan.sadhasivam@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-07-21 13:16:18 +02:00
Bhaumik Bhatt 546362a9ef bus: mhi: core: Validate channel ID when processing command completions
MHI reads the channel ID from the event ring element sent by the
device which can be any value between 0 and 255. In order to
prevent any out of bound accesses, add a check against the maximum
number of channels supported by the controller and those channels
not configured yet so as to skip processing of that event ring
element.

Link: https://lore.kernel.org/r/1624558141-11045-1-git-send-email-bbhatt@codeaurora.org
Fixes: 1d3173a3ba ("bus: mhi: core: Add support for processing events from client device")
Cc: stable@vger.kernel.org #5.10
Reviewed-by: Hemant Kumar <hemantk@codeaurora.org>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Reviewed-by: Jeffrey Hugo <quic_jhugo@quicinc.com>
Signed-off-by: Bhaumik Bhatt <bbhatt@codeaurora.org>
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Link: https://lore.kernel.org/r/20210716075106.49938-3-manivannan.sadhasivam@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-07-21 13:16:18 +02:00
Bhaumik Bhatt 56f6f4c4eb bus: mhi: pci_generic: Apply no-op for wake using sideband wake boolean
Devices such as SDX24 do not have the provision for inband wake
doorbell in the form of channel 127 and instead have a sideband
GPIO for it. Newer devices such as SDX55 or SDX65 support inband
wake method by default. Ensure the functionality is used based on
this such that device wake stays held when a client driver uses
mhi_device_get() API or the equivalent debugfs entry.

Link: https://lore.kernel.org/r/1624560809-30610-1-git-send-email-bbhatt@codeaurora.org
Fixes: e3e5e6508f ("bus: mhi: pci_generic: No-Op for device_wake operations")
Cc: stable@vger.kernel.org #5.12
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Signed-off-by: Bhaumik Bhatt <bbhatt@codeaurora.org>
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Link: https://lore.kernel.org/r/20210716075106.49938-2-manivannan.sadhasivam@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-07-21 13:16:18 +02:00
Richard Laing 5c2c853159 bus: mhi: pci-generic: configurable network interface MRU
The MRU value used by the MHI MBIM network interface affects
the throughput performance of the interface. Different modem
models use different default MRU sizes based on their bandwidth
capabilities. Large values generally result in higher throughput
for larger packet sizes.

In addition if the MRU used by the MHI device is larger than that
specified in the MHI net device the data is fragmented and needs
to be re-assembled which generates a (single) warning message about
the fragmented packets. Setting the MRU on both ends avoids the
extra processing to re-assemble the packets.

This patch allows the documented MRU for a modem to be automatically
set as the MHI net device MRU avoiding fragmentation and improving
throughput performance.

Signed-off-by: Richard Laing <richard.laing@alliedtelesis.co.nz>
Signed-off-by: David S. Miller <davem@davemloft.net>
2021-07-15 10:14:44 -07:00
Christophe JAILLET a25d144fb8 bus: mhi: pci-generic: Add missing 'pci_disable_pcie_error_reporting()' calls
If an error occurs after a 'pci_enable_pcie_error_reporting()' call, it
must be undone by a corresponding 'pci_disable_pcie_error_reporting()'
call

Add the missing call in the error handling path of the probe and in the
remove function.

Cc: <stable@vger.kernel.org>
Fixes: b012ee6bfe ("mhi: pci_generic: Add PCI error handlers")
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Link: https://lore.kernel.org/r/f70c14701f4922d67e717633c91b6c481b59f298.1623445348.git.christophe.jaillet@wanadoo.fr
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Link: https://lore.kernel.org/r/20210621161616.77524-6-manivannan.sadhasivam@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-06-24 15:52:26 +02:00
Baochen Qiang 02b49cd117 bus: mhi: Wait for M2 state during system resume
During system resume, MHI host triggers M3->M0 transition and then waits
for target device to enter M0 state. Once done, the device queues a state
change event into ctrl event ring and notifies MHI host by raising an
interrupt, where a tasklet is scheduled to process this event. In most
cases, the tasklet is served timely and wait operation succeeds.

However, there are cases where CPU is busy and cannot serve this tasklet
for some time. Once delay goes long enough, the device moves itself to M1
state and also interrupts MHI host after inserting a new state change
event to ctrl ring. Later when CPU finally has time to process the ring,
there will be two events:

1. For M3->M0 event, which is the first event to be processed queued first.
   The tasklet handler serves the event, updates device state to M0 and
   wakes up the task.

2. For M0->M1 event, which is processed later, the tasklet handler
   triggers M1->M2 transition and updates device state to M2 directly,
   then wakes up the MHI host (if it is still sleeping on this wait queue).

Note that although MHI host has been woken up while processing the first
event, it may still has no chance to run before the second event is
processed. In other words, MHI host has to keep waiting till timeout
causing the M0 state to be missed.

kernel log here:
...
Apr 15 01:45:14 test-NUC8i7HVK kernel: [ 4247.911251] mhi 0000:06:00.0: Entered with PM state: M3, MHI state: M3
Apr 15 01:45:14 test-NUC8i7HVK kernel: [ 4247.917762] mhi 0000:06:00.0: State change event to state: M0
Apr 15 01:45:14 test-NUC8i7HVK kernel: [ 4247.917767] mhi 0000:06:00.0: State change event to state: M1
Apr 15 01:45:14 test-NUC8i7HVK kernel: [ 4338.788231] mhi 0000:06:00.0: Did not enter M0 state, MHI state: M2, PM state: M2
...

Fix this issue by simply adding M2 as a valid state for resume.

Tested-on: WCN6855 hw2.0 PCI WLAN.HSP.1.1-01720.1-QCAHSPSWPL_V1_V2_SILICONZ_LITE-1

Cc: stable@vger.kernel.org
Fixes: 0c6b20a1d7 ("bus: mhi: core: Add support for MHI suspend and resume")
Signed-off-by: Baochen Qiang <bqiang@codeaurora.org>
Reviewed-by: Hemant Kumar <hemantk@codeaurora.org>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Link: https://lore.kernel.org/r/20210524040312.14409-1-bqiang@codeaurora.org
[mani: slightly massaged the commit message]
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Link: https://lore.kernel.org/r/20210621161616.77524-4-manivannan.sadhasivam@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-06-24 15:51:54 +02:00
Loic Poulain 44b1eba44d bus: mhi: core: Fix power down latency
On graceful power-down/disable transition, when an MHI reset is
performed, the MHI device loses its context, including interrupt
configuration. However, the current implementation is waiting for
event(irq) driven state change to confirm reset has been completed,
which never happens, and causes reset timeout, leading to unexpected
high latency of the mhi_power_down procedure (up to 45 seconds).

Fix that by moving to the recently introduced poll_reg_field method,
waiting for the reset bit to be cleared, in the same way as the
power_on procedure.

Cc: stable@vger.kernel.org
Fixes: a6e2e3522f ("bus: mhi: core: Add support for PM state transitions")
Signed-off-by: Loic Poulain <loic.poulain@linaro.org>
Reviewed-by: Bhaumik Bhatt <bbhatt@codeaurora.org>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Reviewed-by: Hemant Kumar <hemantk@codeaurora.org>
Link: https://lore.kernel.org/r/1620029090-8975-1-git-send-email-loic.poulain@linaro.org
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Link: https://lore.kernel.org/r/20210621161616.77524-3-manivannan.sadhasivam@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-06-24 15:51:49 +02:00
Loic Poulain 5f0c2ee1fe bus: mhi: pci-generic: Fix hibernation
This patch fixes crash after resuming from hibernation. The issue
occurs when mhi stack is builtin and so part of the 'restore-kernel',
causing the device to be resumed from 'restored kernel' with a no
more valid context (memory mappings etc...) and leading to spurious
crashes.

This patch fixes the issue by implementing proper freeze/restore
callbacks.

Link: https://lore.kernel.org/r/1622571445-4505-1-git-send-email-loic.poulain@linaro.org
Reported-by: Shujun Wang <wsj20369@163.com>
Cc: stable <stable@vger.kernel.org>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Signed-off-by: Loic Poulain <loic.poulain@linaro.org>
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Link: https://lore.kernel.org/r/20210606153741.20725-4-manivannan.sadhasivam@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-06-09 19:04:04 +02:00
Wei Yongjun 0b67808ade bus: mhi: pci_generic: Fix possible use-after-free in mhi_pci_remove()
This driver's remove path calls del_timer(). However, that function
does not wait until the timer handler finishes. This means that the
timer handler may still be running after the driver's remove function
has finished, which would result in a use-after-free.

Fix by calling del_timer_sync(), which makes sure the timer handler
has finished, and unable to re-schedule itself.

Link: https://lore.kernel.org/r/20210413160318.2003699-1-weiyongjun1@huawei.com
Fixes: 8562d4fe34 ("mhi: pci_generic: Add health-check")
Cc: stable <stable@vger.kernel.org>
Reported-by: Hulk Robot <hulkci@huawei.com>
Reviewed-by: Hemant kumar <hemantk@codeaurora.org>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Reviewed-by: Loic Poulain <loic.poulain@linaro.org>
Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Link: https://lore.kernel.org/r/20210606153741.20725-3-manivannan.sadhasivam@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-06-09 19:04:00 +02:00
Jarvis Jiang c7711c22c6 bus: mhi: pci_generic: T99W175: update channel name from AT to DUN
According to MHI v1.1 specification, change the channel name of T99W175
from "AT" to "DUN" (Dial-up networking) for both channel 32 and 33,
so that the channels can be bound to the Qcom WWAN control driver, and
device node such as /dev/wwan0p3DUN will be generated, which is very useful
for debugging modem

Link: https://lore.kernel.org/r/20210429014226.21017-1-jarvis.w.jiang@gmail.com
[mani: changed the dev node to /dev/wwan0p3DUN]
Fixes: aac426562f ("bus: mhi: pci_generic: Introduce Foxconn T99W175 support")
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Signed-off-by: Jarvis Jiang <jarvis.w.jiang@gmail.com>
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Link: https://lore.kernel.org/r/20210606153741.20725-2-manivannan.sadhasivam@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-06-09 18:58:52 +02:00
Manivannan Sadhasivam 683e77cadc bus: mhi: core: Fix shadow declarations
This commit fixes below sparse warnings with W=2 about shadow
declarations:

drivers/bus/mhi/core/main.c: In function ‘parse_xfer_event’:
drivers/bus/mhi/core/main.c:667:17: warning: declaration of ‘flags’ shadows a previous local [-Wshadow]
  667 |   unsigned long flags;
      |                 ^~~~~
drivers/bus/mhi/core/main.c:565:16: note: shadowed declaration is here
  565 |  unsigned long flags = 0;
      |                ^~~~~
drivers/bus/mhi/core/main.c: In function ‘mhi_process_ctrl_ev_ring’:
drivers/bus/mhi/core/main.c:856:23: warning: declaration of ‘new_state’ shadows a previous local [-Wshadow]
  856 |     enum mhi_pm_state new_state;
      |                       ^~~~~~~~~
drivers/bus/mhi/core/main.c:837:19: note: shadowed declaration is here
  837 |    enum mhi_state new_state;
      |                   ^~~~~~~~~

Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
2021-04-09 10:11:05 +05:30
Manivannan Sadhasivam 5630c1009b bus: mhi: pci_generic: Constify mhi_controller_config struct definitions
"mhi_controller_config" struct is not modified inside "mhi_pci_dev_info"
struct. So constify the instances.

Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
2021-04-08 19:17:51 +05:30
Jarvis Jiang aac426562f bus: mhi: pci_generic: Introduce Foxconn T99W175 support
Add support for T99W175 modems, this modem series is based on SDX55
qcom chip. The modem is mainly based on MBIM protocol for both the
data and control path.

This patch adds support for below modems:

 - T99W175(based on sdx55), Both for eSIM and Non-eSIM
 - DW5930e(based on sdx55), With eSIM, It's also T99W175
 - DW5930e(based on sdx55), Non-eSIM, It's also T99W175

This patch was tested with Ubuntu 20.04 X86_64 PC as host

Signed-off-by: Jarvis Jiang <jarvis.w.jiang@gmail.com>
Reviewed-by: Loic Poulain <loic.poulain@linaro.org>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Link: https://lore.kernel.org/r/20210408095524.3559-1-jarvis.w.jiang@gmail.com
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
2021-04-08 19:12:17 +05:30
Jeffrey Hugo ec32332df7 bus: mhi: core: Sanity check values from remote device before use
When parsing the structures in the shared memory, there are values which
come from the remote device.  For example, a transfer completion event
will have a pointer to the tre in the relevant channel's transfer ring.
As another example, event ring elements may specify a channel in which
the event occurred, however the specified channel value may not be valid
as no channel is defined at that index even though the index may be less
than the maximum allowed index.  Such values should be considered to be
untrusted, and validated before use.  If we blindly use such values, we
may access invalid data or crash if the values are corrupted.

If validation fails, drop the relevant event.

Signed-off-by: Jeffrey Hugo <jhugo@codeaurora.org>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Reviewed-by: Hemant Kumar <hemantk@codeaurora.org>
Link: https://lore.kernel.org/r/1615411855-15053-1-git-send-email-jhugo@codeaurora.org
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
2021-04-08 11:57:38 +05:30
Loic Poulain 11134390d7 bus: mhi: pci_generic: Add FIREHOSE channels
When device enters flash programmer context (FP), it exposes firehose
protocol through the EDL dedicated channels.

Signed-off-by: Loic Poulain <loic.poulain@linaro.org>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Link: https://lore.kernel.org/r/1617784860-32439-1-git-send-email-loic.poulain@linaro.org
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
2021-04-07 14:37:23 +05:30
Loic Poulain 757072abe1 bus: mhi: pci_generic: Implement PCI shutdown callback
Deinit the device on shutdown to halt MHI/PCI operation on device
side. This change fixes floating device state with some hosts that
do not fully shutdown PCIe device when rebooting.

Signed-off-by: Loic Poulain <loic.poulain@linaro.org>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Link: https://lore.kernel.org/r/1616169037-7969-1-git-send-email-loic.poulain@linaro.org
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
2021-04-07 13:45:29 +05:30
Bhaumik Bhatt 8aaa288f70 bus: mhi: core: Remove __ prefix for MHI channel unprepare function
The __mhi_unprepare_channel() API does not require the __ prefix.
Get rid of it and make the internal function consistent with the
other function names.

Signed-off-by: Bhaumik Bhatt <bbhatt@codeaurora.org>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Reviewed-by: Hemant Kumar <hemantk@codeaurora.org>
Link: https://lore.kernel.org/r/1617311778-1254-9-git-send-email-bbhatt@codeaurora.org
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
2021-04-07 12:25:42 +05:30
Bhaumik Bhatt 8e06e9fb99 bus: mhi: core: Check channel execution environment before issuing reset
A client can attempt to unprepare certain channels for transfer even
after the execution environment they are supposed to run in has changed.
In the event that happens, the device need not be notified of the reset
and the host can proceed with clean up for the channel context and
memory allocated for it on the host as the device will no longer be able
to respond to such a request.

Signed-off-by: Bhaumik Bhatt <bbhatt@codeaurora.org>
Reviewed-by: Hemant Kumar <hemantk@codeaurora.org>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Link: https://lore.kernel.org/r/1617311778-1254-8-git-send-email-bbhatt@codeaurora.org
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
2021-04-07 12:25:42 +05:30
Bhaumik Bhatt 47705c0846 bus: mhi: core: Clear configuration from channel context during reset
When clearing up the channel context after client drivers are
done using channels, the configuration is currently not being
reset entirely. Ensure this is done to appropriately handle
issues where clients unaware of the context state end up calling
functions which expect a context.

Signed-off-by: Bhaumik Bhatt <bbhatt@codeaurora.org>
Reviewed-by: Hemant Kumar <hemantk@codeaurora.org>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Link: https://lore.kernel.org/r/1617311778-1254-7-git-send-email-bbhatt@codeaurora.org
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
2021-04-07 12:25:42 +05:30
Bhaumik Bhatt 73b7aebcc8 bus: mhi: core: Hold device wake for channel update commands
MHI host can fail early if device is in a bad state by attempting
to assert device wake and holding the runtime PM vote before
sending a channel update command instead of performing a wake
toggle and waiting for a timeout if the send were to fail. This
can help improve the design and enable shorter wait periods for
device to respond as votes are already held.

Signed-off-by: Bhaumik Bhatt <bbhatt@codeaurora.org>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Link: https://lore.kernel.org/r/1617311778-1254-6-git-send-email-bbhatt@codeaurora.org
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
2021-04-07 12:25:42 +05:30
Bhaumik Bhatt cde61bb047 bus: mhi: core: Update debug messages to use client device
Debug messages dealing with client devices use the generic MHI
controller or parent device along with a channel number. It would
be better to instead use the client device directly and enable
better log messages for channel updates.

Suggested-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Signed-off-by: Bhaumik Bhatt <bbhatt@codeaurora.org>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Link: https://lore.kernel.org/r/1617311778-1254-5-git-send-email-bbhatt@codeaurora.org
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
2021-04-07 12:25:42 +05:30
Bhaumik Bhatt 3317dc6cea bus: mhi: core: Improvements to the channel handling state machine
Improve the channel handling state machine such that all commands
go through a common function and a validation process to ensure
that the state machine is not violated in any way and adheres to
the MHI specification. Using this common function allows MHI to
eliminate some unnecessary debug messages and code duplication.

Signed-off-by: Bhaumik Bhatt <bbhatt@codeaurora.org>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Link: https://lore.kernel.org/r/1617311778-1254-4-git-send-email-bbhatt@codeaurora.org
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
2021-04-07 12:25:42 +05:30
Bhaumik Bhatt 4e44ae3d6d bus: mhi: core: Clear context for stopped channels from remove()
If a channel was explicitly stopped but not reset and a driver
remove is issued, clean up the channel context such that it is
reflected on the device. This move is useful if a client driver
module is unloaded or a device crash occurs with the host having
placed the channel in a stopped state.

Signed-off-by: Bhaumik Bhatt <bbhatt@codeaurora.org>
Reviewed-by: Hemant Kumar <hemantk@codeaurora.org>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Link: https://lore.kernel.org/r/1617311778-1254-3-git-send-email-bbhatt@codeaurora.org
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
2021-04-07 12:25:42 +05:30