[libata] Add ATA transport class
This is a scheleton for libata transport class. All information is read only, exporting information from libata: - ata_port class: one per ATA port - ata_link class: one per ATA port or 15 for SATA Port Multiplier - ata_device class: up to 2 for PATA link, usually one for SATA. Signed-off-by: Gwendal Grignou <gwendal@google.com> Reviewed-by: Grant Grundler <grundler@google.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
This commit is contained in:
Gwendal Grignou
Jeff Garzik
Родитель
f6f94e2ab1
Коммит
d9027470b8
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@ -0,0 +1,99 @@
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What: /sys/class/ata_...
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Date: August 2008
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Contact: Gwendal Grignou<gwendal@google.com>
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Description:
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Provide a place in sysfs for storing the ATA topology of the system. This allows
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retrieving various information about ATA objects.
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Files under /sys/class/ata_port
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-------------------------------
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For each port, a directory ataX is created where X is the ata_port_id of
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the port. The device parent is the ata host device.
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idle_irq (read)
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Number of IRQ received by the port while idle [some ata HBA only].
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nr_pmp_links (read)
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If a SATA Port Multiplier (PM) is connected, number of link behind it.
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Files under /sys/class/ata_link
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-------------------------------
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Behind each port, there is a ata_link. If there is a SATA PM in the
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topology, 15 ata_link objects are created.
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If a link is behind a port, the directory name is linkX, where X is
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ata_port_id of the port.
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If a link is behind a PM, its name is linkX.Y where X is ata_port_id
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of the parent port and Y the PM port.
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hw_sata_spd_limit
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Maximum speed supported by the connected SATA device.
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sata_spd_limit
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Maximum speed imposed by libata.
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sata_spd
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Current speed of the link [1.5, 3Gps,...].
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Files under /sys/class/ata_device
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---------------------------------
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Behind each link, up to two ata device are created.
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The name of the directory is devX[.Y].Z where:
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- X is ata_port_id of the port where the device is connected,
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- Y the port of the PM if any, and
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- Z the device id: for PATA, there is usually 2 devices [0,1],
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only 1 for SATA.
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class
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Device class. Can be "ata" for disk, "atapi" for packet device,
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"pmp" for PM, or "none" if no device was found behind the link.
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dma_mode
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Transfer modes supported by the device when in DMA mode.
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Mostly used by PATA device.
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pio_mode
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Transfer modes supported by the device when in PIO mode.
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Mostly used by PATA device.
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xfer_mode
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Current transfer mode.
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id
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Cached result of IDENTIFY command, as described in ATA8 7.16 and 7.17.
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Only valid if the device is not a PM.
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gscr
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Cached result of the dump of PM GSCR register.
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Valid registers are:
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0: SATA_PMP_GSCR_PROD_ID,
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1: SATA_PMP_GSCR_REV,
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2: SATA_PMP_GSCR_PORT_INFO,
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32: SATA_PMP_GSCR_ERROR,
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33: SATA_PMP_GSCR_ERROR_EN,
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64: SATA_PMP_GSCR_FEAT,
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96: SATA_PMP_GSCR_FEAT_EN,
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130: SATA_PMP_GSCR_SII_GPIO
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Only valid if the device is a PM.
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spdn_cnt
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Number of time libata decided to lower the speed of link due to errors.
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ering
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Formatted output of the error ring of the device.
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@ -99,7 +99,7 @@ obj-$(CONFIG_ATA_GENERIC) += ata_generic.o
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# Should be last libata driver
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obj-$(CONFIG_PATA_LEGACY) += pata_legacy.o
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libata-objs := libata-core.o libata-scsi.o libata-eh.o
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libata-objs := libata-core.o libata-scsi.o libata-eh.o libata-transport.o
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libata-$(CONFIG_ATA_SFF) += libata-sff.o
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libata-$(CONFIG_SATA_PMP) += libata-pmp.o
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libata-$(CONFIG_ATA_ACPI) += libata-acpi.o
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@ -68,7 +68,7 @@
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#include <linux/ratelimit.h>
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#include "libata.h"
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#include "libata-transport.h"
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/* debounce timing parameters in msecs { interval, duration, timeout } */
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const unsigned long sata_deb_timing_normal[] = { 5, 100, 2000 };
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@ -1017,7 +1017,7 @@ const char *ata_mode_string(unsigned long xfer_mask)
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return "<n/a>";
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}
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static const char *sata_spd_string(unsigned int spd)
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const char *sata_spd_string(unsigned int spd)
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{
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static const char * const spd_str[] = {
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"1.5 Gbps",
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@ -5517,7 +5517,8 @@ void ata_link_init(struct ata_port *ap, struct ata_link *link, int pmp)
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int i;
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/* clear everything except for devices */
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memset(link, 0, offsetof(struct ata_link, device[0]));
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memset((void *)link + ATA_LINK_CLEAR_BEGIN, 0,
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ATA_LINK_CLEAR_END - ATA_LINK_CLEAR_BEGIN);
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link->ap = ap;
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link->pmp = pmp;
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@ -6093,9 +6094,18 @@ int ata_host_register(struct ata_host *host, struct scsi_host_template *sht)
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for (i = 0; i < host->n_ports; i++)
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host->ports[i]->print_id = ata_print_id++;
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/* Create associated sysfs transport objects */
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for (i = 0; i < host->n_ports; i++) {
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rc = ata_tport_add(host->dev,host->ports[i]);
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if (rc) {
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goto err_tadd;
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}
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}
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rc = ata_scsi_add_hosts(host, sht);
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if (rc)
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return rc;
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goto err_tadd;
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/* associate with ACPI nodes */
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ata_acpi_associate(host);
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@ -6136,6 +6146,13 @@ int ata_host_register(struct ata_host *host, struct scsi_host_template *sht)
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}
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return 0;
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err_tadd:
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while (--i >= 0) {
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ata_tport_delete(host->ports[i]);
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}
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return rc;
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}
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/**
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@ -6226,6 +6243,13 @@ static void ata_port_detach(struct ata_port *ap)
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cancel_rearming_delayed_work(&ap->hotplug_task);
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skip_eh:
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if (ap->pmp_link) {
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int i;
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for (i = 0; i < SATA_PMP_MAX_PORTS; i++)
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ata_tlink_delete(&ap->pmp_link[i]);
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}
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ata_tport_delete(ap);
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/* remove the associated SCSI host */
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scsi_remove_host(ap->scsi_host);
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}
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@ -6542,7 +6566,7 @@ static void __init ata_parse_force_param(void)
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static int __init ata_init(void)
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{
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int rc = -ENOMEM;
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int rc;
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ata_parse_force_param();
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@ -6552,12 +6576,25 @@ static int __init ata_init(void)
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return rc;
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}
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libata_transport_init();
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ata_scsi_transport_template = ata_attach_transport();
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if (!ata_scsi_transport_template) {
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ata_sff_exit();
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rc = -ENOMEM;
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goto err_out;
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}
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printk(KERN_DEBUG "libata version " DRV_VERSION " loaded.\n");
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return 0;
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err_out:
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return rc;
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}
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static void __exit ata_exit(void)
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{
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ata_release_transport(ata_scsi_transport_template);
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libata_transport_exit();
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ata_sff_exit();
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kfree(ata_force_tbl);
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}
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@ -57,6 +57,7 @@ enum {
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/* error flags */
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ATA_EFLAG_IS_IO = (1 << 0),
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ATA_EFLAG_DUBIOUS_XFER = (1 << 1),
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ATA_EFLAG_OLD_ER = (1 << 31),
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/* error categories */
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ATA_ECAT_NONE = 0,
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@ -396,14 +397,9 @@ static struct ata_ering_entry *ata_ering_top(struct ata_ering *ering)
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return NULL;
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}
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static void ata_ering_clear(struct ata_ering *ering)
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{
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memset(ering, 0, sizeof(*ering));
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}
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static int ata_ering_map(struct ata_ering *ering,
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int (*map_fn)(struct ata_ering_entry *, void *),
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void *arg)
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int ata_ering_map(struct ata_ering *ering,
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int (*map_fn)(struct ata_ering_entry *, void *),
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void *arg)
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{
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int idx, rc = 0;
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struct ata_ering_entry *ent;
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@ -422,6 +418,17 @@ static int ata_ering_map(struct ata_ering *ering,
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return rc;
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}
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int ata_ering_clear_cb(struct ata_ering_entry *ent, void *void_arg)
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{
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ent->eflags |= ATA_EFLAG_OLD_ER;
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return 0;
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}
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static void ata_ering_clear(struct ata_ering *ering)
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{
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ata_ering_map(ering, ata_ering_clear_cb, NULL);
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}
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static unsigned int ata_eh_dev_action(struct ata_device *dev)
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{
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struct ata_eh_context *ehc = &dev->link->eh_context;
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@ -1755,7 +1762,7 @@ static int speed_down_verdict_cb(struct ata_ering_entry *ent, void *void_arg)
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struct speed_down_verdict_arg *arg = void_arg;
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int cat;
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if (ent->timestamp < arg->since)
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if ((ent->eflags & ATA_EFLAG_OLD_ER) || (ent->timestamp < arg->since))
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return -1;
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cat = ata_eh_categorize_error(ent->eflags, ent->err_mask,
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@ -11,6 +11,7 @@
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#include <linux/libata.h>
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#include <linux/slab.h>
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#include "libata.h"
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#include "libata-transport.h"
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const struct ata_port_operations sata_pmp_port_ops = {
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.inherits = &sata_port_ops,
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@ -312,10 +313,10 @@ static int sata_pmp_configure(struct ata_device *dev, int print_info)
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return rc;
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}
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static int sata_pmp_init_links(struct ata_port *ap, int nr_ports)
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static int sata_pmp_init_links (struct ata_port *ap, int nr_ports)
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{
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struct ata_link *pmp_link = ap->pmp_link;
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int i;
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int i, err;
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if (!pmp_link) {
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pmp_link = kzalloc(sizeof(pmp_link[0]) * SATA_PMP_MAX_PORTS,
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@ -327,6 +328,13 @@ static int sata_pmp_init_links(struct ata_port *ap, int nr_ports)
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ata_link_init(ap, &pmp_link[i], i);
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ap->pmp_link = pmp_link;
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for (i = 0; i < SATA_PMP_MAX_PORTS; i++) {
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err = ata_tlink_add(&pmp_link[i]);
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if (err) {
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goto err_tlink;
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}
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}
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}
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for (i = 0; i < nr_ports; i++) {
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@ -339,6 +347,12 @@ static int sata_pmp_init_links(struct ata_port *ap, int nr_ports)
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}
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return 0;
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err_tlink:
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while (--i >= 0)
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ata_tlink_delete(&pmp_link[i]);
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kfree(pmp_link);
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ap->pmp_link = NULL;
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return err;
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}
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static void sata_pmp_quirks(struct ata_port *ap)
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@ -51,6 +51,7 @@
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#include <asm/unaligned.h>
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#include "libata.h"
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#include "libata-transport.h"
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#define SECTOR_SIZE 512
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#define ATA_SCSI_RBUF_SIZE 4096
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@ -64,9 +65,6 @@ static struct ata_device *__ata_scsi_find_dev(struct ata_port *ap,
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const struct scsi_device *scsidev);
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static struct ata_device *ata_scsi_find_dev(struct ata_port *ap,
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const struct scsi_device *scsidev);
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static int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel,
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unsigned int id, unsigned int lun);
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#define RW_RECOVERY_MPAGE 0x1
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#define RW_RECOVERY_MPAGE_LEN 12
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@ -106,17 +104,6 @@ static const u8 def_control_mpage[CONTROL_MPAGE_LEN] = {
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0, 30 /* extended self test time, see 05-359r1 */
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};
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/*
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* libata transport template. libata doesn't do real transport stuff.
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* It just needs the eh_timed_out hook.
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*/
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static struct scsi_transport_template ata_scsi_transport_template = {
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.eh_strategy_handler = ata_scsi_error,
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.eh_timed_out = ata_scsi_timed_out,
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.user_scan = ata_scsi_user_scan,
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};
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static const struct {
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enum link_pm value;
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const char *name;
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@ -3334,7 +3321,7 @@ int ata_scsi_add_hosts(struct ata_host *host, struct scsi_host_template *sht)
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*(struct ata_port **)&shost->hostdata[0] = ap;
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ap->scsi_host = shost;
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shost->transportt = &ata_scsi_transport_template;
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shost->transportt = ata_scsi_transport_template;
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shost->unique_id = ap->print_id;
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shost->max_id = 16;
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shost->max_lun = 1;
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@ -3616,8 +3603,8 @@ void ata_scsi_hotplug(struct work_struct *work)
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* RETURNS:
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* Zero.
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*/
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static int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel,
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unsigned int id, unsigned int lun)
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int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel,
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unsigned int id, unsigned int lun)
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{
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struct ata_port *ap = ata_shost_to_port(shost);
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unsigned long flags;
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|
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@ -0,0 +1,773 @@
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/*
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* Copyright 2008 ioogle, Inc. All rights reserved.
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* Released under GPL v2.
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*
|
||||
* Libata transport class.
|
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*
|
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* The ATA transport class contains common code to deal with ATA HBAs,
|
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* an approximated representation of ATA topologies in the driver model,
|
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* and various sysfs attributes to expose these topologies and management
|
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* interfaces to user-space.
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*
|
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* There are 3 objects defined in in this class:
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* - ata_port
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* - ata_link
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* - ata_device
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* Each port has a link object. Each link can have up to two devices for PATA
|
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* and generally one for SATA.
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* If there is SATA port multiplier [PMP], 15 additional ata_link object are
|
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* created.
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*
|
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* These objects are created when the ata host is initialized and when a PMP is
|
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* found. They are removed only when the HBA is removed, cleaned before the
|
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* error handler runs.
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*/
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#include <linux/kernel.h>
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#include <linux/blkdev.h>
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#include <linux/spinlock.h>
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#include <scsi/scsi_transport.h>
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#include <linux/libata.h>
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#include <linux/hdreg.h>
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#include <linux/uaccess.h>
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||||
|
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#include "libata.h"
|
||||
#include "libata-transport.h"
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#define ATA_PORT_ATTRS 2
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#define ATA_LINK_ATTRS 3
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#define ATA_DEV_ATTRS 9
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struct scsi_transport_template;
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struct scsi_transport_template *ata_scsi_transport_template;
|
||||
|
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struct ata_internal {
|
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struct scsi_transport_template t;
|
||||
|
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struct device_attribute private_port_attrs[ATA_PORT_ATTRS];
|
||||
struct device_attribute private_link_attrs[ATA_LINK_ATTRS];
|
||||
struct device_attribute private_dev_attrs[ATA_DEV_ATTRS];
|
||||
|
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struct transport_container link_attr_cont;
|
||||
struct transport_container dev_attr_cont;
|
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|
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/*
|
||||
* The array of null terminated pointers to attributes
|
||||
* needed by scsi_sysfs.c
|
||||
*/
|
||||
struct device_attribute *link_attrs[ATA_LINK_ATTRS + 1];
|
||||
struct device_attribute *port_attrs[ATA_PORT_ATTRS + 1];
|
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struct device_attribute *dev_attrs[ATA_DEV_ATTRS + 1];
|
||||
};
|
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#define to_ata_internal(tmpl) container_of(tmpl, struct ata_internal, t)
|
||||
|
||||
|
||||
#define tdev_to_device(d) \
|
||||
container_of((d), struct ata_device, tdev)
|
||||
#define transport_class_to_dev(dev) \
|
||||
tdev_to_device((dev)->parent)
|
||||
|
||||
#define tdev_to_link(d) \
|
||||
container_of((d), struct ata_link, tdev)
|
||||
#define transport_class_to_link(dev) \
|
||||
tdev_to_link((dev)->parent)
|
||||
|
||||
#define tdev_to_port(d) \
|
||||
container_of((d), struct ata_port, tdev)
|
||||
#define transport_class_to_port(dev) \
|
||||
tdev_to_port((dev)->parent)
|
||||
|
||||
|
||||
/* Device objects are always created whit link objects */
|
||||
static int ata_tdev_add(struct ata_device *dev);
|
||||
static void ata_tdev_delete(struct ata_device *dev);
|
||||
|
||||
|
||||
/*
|
||||
* Hack to allow attributes of the same name in different objects.
|
||||
*/
|
||||
#define ATA_DEVICE_ATTR(_prefix,_name,_mode,_show,_store) \
|
||||
struct device_attribute device_attr_##_prefix##_##_name = \
|
||||
__ATTR(_name,_mode,_show,_store)
|
||||
|
||||
#define ata_bitfield_name_match(title, table) \
|
||||
static ssize_t \
|
||||
get_ata_##title##_names(u32 table_key, char *buf) \
|
||||
{ \
|
||||
char *prefix = ""; \
|
||||
ssize_t len = 0; \
|
||||
int i; \
|
||||
\
|
||||
for (i = 0; i < ARRAY_SIZE(table); i++) { \
|
||||
if (table[i].value & table_key) { \
|
||||
len += sprintf(buf + len, "%s%s", \
|
||||
prefix, table[i].name); \
|
||||
prefix = ", "; \
|
||||
} \
|
||||
} \
|
||||
len += sprintf(buf + len, "\n"); \
|
||||
return len; \
|
||||
}
|
||||
|
||||
#define ata_bitfield_name_search(title, table) \
|
||||
static ssize_t \
|
||||
get_ata_##title##_names(u32 table_key, char *buf) \
|
||||
{ \
|
||||
ssize_t len = 0; \
|
||||
int i; \
|
||||
\
|
||||
for (i = 0; i < ARRAY_SIZE(table); i++) { \
|
||||
if (table[i].value == table_key) { \
|
||||
len += sprintf(buf + len, "%s", \
|
||||
table[i].name); \
|
||||
break; \
|
||||
} \
|
||||
} \
|
||||
len += sprintf(buf + len, "\n"); \
|
||||
return len; \
|
||||
}
|
||||
|
||||
static struct {
|
||||
u32 value;
|
||||
char *name;
|
||||
} ata_class_names[] = {
|
||||
{ ATA_DEV_UNKNOWN, "unknown" },
|
||||
{ ATA_DEV_ATA, "ata" },
|
||||
{ ATA_DEV_ATA_UNSUP, "ata" },
|
||||
{ ATA_DEV_ATAPI, "atapi" },
|
||||
{ ATA_DEV_ATAPI_UNSUP, "atapi" },
|
||||
{ ATA_DEV_PMP, "pmp" },
|
||||
{ ATA_DEV_PMP_UNSUP, "pmp" },
|
||||
{ ATA_DEV_SEMB, "semb" },
|
||||
{ ATA_DEV_SEMB_UNSUP, "semb" },
|
||||
{ ATA_DEV_NONE, "none" }
|
||||
};
|
||||
ata_bitfield_name_search(class, ata_class_names)
|
||||
|
||||
|
||||
static struct {
|
||||
u32 value;
|
||||
char *name;
|
||||
} ata_err_names[] = {
|
||||
{ AC_ERR_DEV, "DeviceError" },
|
||||
{ AC_ERR_HSM, "HostStateMachineError" },
|
||||
{ AC_ERR_TIMEOUT, "Timeout" },
|
||||
{ AC_ERR_MEDIA, "MediaError" },
|
||||
{ AC_ERR_ATA_BUS, "BusError" },
|
||||
{ AC_ERR_HOST_BUS, "HostBusError" },
|
||||
{ AC_ERR_SYSTEM, "SystemError" },
|
||||
{ AC_ERR_INVALID, "InvalidArg" },
|
||||
{ AC_ERR_OTHER, "Unknown" },
|
||||
{ AC_ERR_NODEV_HINT, "NoDeviceHint" },
|
||||
{ AC_ERR_NCQ, "NCQError" }
|
||||
};
|
||||
ata_bitfield_name_match(err, ata_err_names)
|
||||
|
||||
static struct {
|
||||
u32 value;
|
||||
char *name;
|
||||
} ata_xfer_names[] = {
|
||||
{ XFER_UDMA_7, "XFER_UDMA_7" },
|
||||
{ XFER_UDMA_6, "XFER_UDMA_6" },
|
||||
{ XFER_UDMA_5, "XFER_UDMA_5" },
|
||||
{ XFER_UDMA_4, "XFER_UDMA_4" },
|
||||
{ XFER_UDMA_3, "XFER_UDMA_3" },
|
||||
{ XFER_UDMA_2, "XFER_UDMA_2" },
|
||||
{ XFER_UDMA_1, "XFER_UDMA_1" },
|
||||
{ XFER_UDMA_0, "XFER_UDMA_0" },
|
||||
{ XFER_MW_DMA_4, "XFER_MW_DMA_4" },
|
||||
{ XFER_MW_DMA_3, "XFER_MW_DMA_3" },
|
||||
{ XFER_MW_DMA_2, "XFER_MW_DMA_2" },
|
||||
{ XFER_MW_DMA_1, "XFER_MW_DMA_1" },
|
||||
{ XFER_MW_DMA_0, "XFER_MW_DMA_0" },
|
||||
{ XFER_SW_DMA_2, "XFER_SW_DMA_2" },
|
||||
{ XFER_SW_DMA_1, "XFER_SW_DMA_1" },
|
||||
{ XFER_SW_DMA_0, "XFER_SW_DMA_0" },
|
||||
{ XFER_PIO_6, "XFER_PIO_6" },
|
||||
{ XFER_PIO_5, "XFER_PIO_5" },
|
||||
{ XFER_PIO_4, "XFER_PIO_4" },
|
||||
{ XFER_PIO_3, "XFER_PIO_3" },
|
||||
{ XFER_PIO_2, "XFER_PIO_2" },
|
||||
{ XFER_PIO_1, "XFER_PIO_1" },
|
||||
{ XFER_PIO_0, "XFER_PIO_0" },
|
||||
{ XFER_PIO_SLOW, "XFER_PIO_SLOW" }
|
||||
};
|
||||
ata_bitfield_name_match(xfer,ata_xfer_names)
|
||||
|
||||
/*
|
||||
* ATA Port attributes
|
||||
*/
|
||||
#define ata_port_show_simple(field, name, format_string, cast) \
|
||||
static ssize_t \
|
||||
show_ata_port_##name(struct device *dev, \
|
||||
struct device_attribute *attr, char *buf) \
|
||||
{ \
|
||||
struct ata_port *ap = transport_class_to_port(dev); \
|
||||
\
|
||||
return snprintf(buf, 20, format_string, cast ap->field); \
|
||||
}
|
||||
|
||||
#define ata_port_simple_attr(field, name, format_string, type) \
|
||||
ata_port_show_simple(field, name, format_string, (type)) \
|
||||
static DEVICE_ATTR(name, S_IRUGO, show_ata_port_##name, NULL)
|
||||
|
||||
ata_port_simple_attr(nr_pmp_links, nr_pmp_links, "%d\n", int);
|
||||
ata_port_simple_attr(stats.idle_irq, idle_irq, "%ld\n", unsigned long);
|
||||
|
||||
static DECLARE_TRANSPORT_CLASS(ata_port_class,
|
||||
"ata_port", NULL, NULL, NULL);
|
||||
|
||||
static void ata_tport_release(struct device *dev)
|
||||
{
|
||||
put_device(dev->parent);
|
||||
}
|
||||
|
||||
/**
|
||||
* ata_is_port -- check if a struct device represents a ATA port
|
||||
* @dev: device to check
|
||||
*
|
||||
* Returns:
|
||||
* %1 if the device represents a ATA Port, %0 else
|
||||
*/
|
||||
int ata_is_port(const struct device *dev)
|
||||
{
|
||||
return dev->release == ata_tport_release;
|
||||
}
|
||||
|
||||
static int ata_tport_match(struct attribute_container *cont,
|
||||
struct device *dev)
|
||||
{
|
||||
if (!ata_is_port(dev))
|
||||
return 0;
|
||||
return &ata_scsi_transport_template->host_attrs.ac == cont;
|
||||
}
|
||||
|
||||
/**
|
||||
* ata_tport_delete -- remove ATA PORT
|
||||
* @port: ATA PORT to remove
|
||||
*
|
||||
* Removes the specified ATA PORT. Remove the associated link as well.
|
||||
*/
|
||||
void ata_tport_delete(struct ata_port *ap)
|
||||
{
|
||||
struct device *dev = &ap->tdev;
|
||||
|
||||
ata_tlink_delete(&ap->link);
|
||||
|
||||
transport_remove_device(dev);
|
||||
device_del(dev);
|
||||
transport_destroy_device(dev);
|
||||
put_device(dev);
|
||||
}
|
||||
|
||||
/** ata_tport_add - initialize a transport ATA port structure
|
||||
*
|
||||
* @parent: parent device
|
||||
* @ap: existing ata_port structure
|
||||
*
|
||||
* Initialize a ATA port structure for sysfs. It will be added to the device
|
||||
* tree below the device specified by @parent which could be a PCI device.
|
||||
*
|
||||
* Returns %0 on success
|
||||
*/
|
||||
int ata_tport_add(struct device *parent,
|
||||
struct ata_port *ap)
|
||||
{
|
||||
int error;
|
||||
struct device *dev = &ap->tdev;
|
||||
|
||||
device_initialize(dev);
|
||||
|
||||
dev->parent = get_device(parent);
|
||||
dev->release = ata_tport_release;
|
||||
dev_set_name(dev, "ata%d", ap->print_id);
|
||||
transport_setup_device(dev);
|
||||
error = device_add(dev);
|
||||
if (error) {
|
||||
goto tport_err;
|
||||
}
|
||||
|
||||
transport_add_device(dev);
|
||||
transport_configure_device(dev);
|
||||
|
||||
error = ata_tlink_add(&ap->link);
|
||||
if (error) {
|
||||
goto tport_link_err;
|
||||
}
|
||||
return 0;
|
||||
|
||||
tport_link_err:
|
||||
transport_remove_device(dev);
|
||||
device_del(dev);
|
||||
|
||||
tport_err:
|
||||
transport_destroy_device(dev);
|
||||
put_device(dev);
|
||||
return error;
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* ATA link attributes
|
||||
*/
|
||||
|
||||
|
||||
#define ata_link_show_linkspeed(field) \
|
||||
static ssize_t \
|
||||
show_ata_link_##field(struct device *dev, \
|
||||
struct device_attribute *attr, char *buf) \
|
||||
{ \
|
||||
struct ata_link *link = transport_class_to_link(dev); \
|
||||
\
|
||||
return sprintf(buf,"%s\n", sata_spd_string(fls(link->field))); \
|
||||
}
|
||||
|
||||
#define ata_link_linkspeed_attr(field) \
|
||||
ata_link_show_linkspeed(field) \
|
||||
static DEVICE_ATTR(field, S_IRUGO, show_ata_link_##field, NULL)
|
||||
|
||||
ata_link_linkspeed_attr(hw_sata_spd_limit);
|
||||
ata_link_linkspeed_attr(sata_spd_limit);
|
||||
ata_link_linkspeed_attr(sata_spd);
|
||||
|
||||
|
||||
static DECLARE_TRANSPORT_CLASS(ata_link_class,
|
||||
"ata_link", NULL, NULL, NULL);
|
||||
|
||||
static void ata_tlink_release(struct device *dev)
|
||||
{
|
||||
put_device(dev->parent);
|
||||
}
|
||||
|
||||
/**
|
||||
* ata_is_link -- check if a struct device represents a ATA link
|
||||
* @dev: device to check
|
||||
*
|
||||
* Returns:
|
||||
* %1 if the device represents a ATA link, %0 else
|
||||
*/
|
||||
int ata_is_link(const struct device *dev)
|
||||
{
|
||||
return dev->release == ata_tlink_release;
|
||||
}
|
||||
|
||||
static int ata_tlink_match(struct attribute_container *cont,
|
||||
struct device *dev)
|
||||
{
|
||||
struct ata_internal* i = to_ata_internal(ata_scsi_transport_template);
|
||||
if (!ata_is_link(dev))
|
||||
return 0;
|
||||
return &i->link_attr_cont.ac == cont;
|
||||
}
|
||||
|
||||
/**
|
||||
* ata_tlink_delete -- remove ATA LINK
|
||||
* @port: ATA LINK to remove
|
||||
*
|
||||
* Removes the specified ATA LINK. remove associated ATA device(s) as well.
|
||||
*/
|
||||
void ata_tlink_delete(struct ata_link *link)
|
||||
{
|
||||
struct device *dev = &link->tdev;
|
||||
struct ata_device *ata_dev;
|
||||
|
||||
ata_for_each_dev(ata_dev, link, ALL) {
|
||||
ata_tdev_delete(ata_dev);
|
||||
}
|
||||
|
||||
transport_remove_device(dev);
|
||||
device_del(dev);
|
||||
transport_destroy_device(dev);
|
||||
put_device(dev);
|
||||
}
|
||||
|
||||
/**
|
||||
* ata_tlink_add -- initialize a transport ATA link structure
|
||||
* @link: allocated ata_link structure.
|
||||
*
|
||||
* Initialize an ATA LINK structure for sysfs. It will be added in the
|
||||
* device tree below the ATA PORT it belongs to.
|
||||
*
|
||||
* Returns %0 on success
|
||||
*/
|
||||
int ata_tlink_add(struct ata_link *link)
|
||||
{
|
||||
struct device *dev = &link->tdev;
|
||||
struct ata_port *ap = link->ap;
|
||||
struct ata_device *ata_dev;
|
||||
int error;
|
||||
|
||||
device_initialize(dev);
|
||||
dev->parent = get_device(&ap->tdev);
|
||||
dev->release = ata_tlink_release;
|
||||
if (ata_is_host_link(link))
|
||||
dev_set_name(dev, "link%d", ap->print_id);
|
||||
else
|
||||
dev_set_name(dev, "link%d.%d", ap->print_id, link->pmp);
|
||||
|
||||
transport_setup_device(dev);
|
||||
|
||||
error = device_add(dev);
|
||||
if (error) {
|
||||
goto tlink_err;
|
||||
}
|
||||
|
||||
transport_add_device(dev);
|
||||
transport_configure_device(dev);
|
||||
|
||||
ata_for_each_dev(ata_dev, link, ALL) {
|
||||
error = ata_tdev_add(ata_dev);
|
||||
if (error) {
|
||||
goto tlink_dev_err;
|
||||
}
|
||||
}
|
||||
return 0;
|
||||
tlink_dev_err:
|
||||
while (--ata_dev >= link->device) {
|
||||
ata_tdev_delete(ata_dev);
|
||||
}
|
||||
transport_remove_device(dev);
|
||||
device_del(dev);
|
||||
tlink_err:
|
||||
transport_destroy_device(dev);
|
||||
put_device(dev);
|
||||
return error;
|
||||
}
|
||||
|
||||
/*
|
||||
* ATA device attributes
|
||||
*/
|
||||
|
||||
#define ata_dev_show_class(title, field) \
|
||||
static ssize_t \
|
||||
show_ata_dev_##field(struct device *dev, \
|
||||
struct device_attribute *attr, char *buf) \
|
||||
{ \
|
||||
struct ata_device *ata_dev = transport_class_to_dev(dev); \
|
||||
\
|
||||
return get_ata_##title##_names(ata_dev->field, buf); \
|
||||
}
|
||||
|
||||
#define ata_dev_attr(title, field) \
|
||||
ata_dev_show_class(title, field) \
|
||||
static DEVICE_ATTR(field, S_IRUGO, show_ata_dev_##field, NULL)
|
||||
|
||||
ata_dev_attr(class, class);
|
||||
ata_dev_attr(xfer, pio_mode);
|
||||
ata_dev_attr(xfer, dma_mode);
|
||||
ata_dev_attr(xfer, xfer_mode);
|
||||
|
||||
|
||||
#define ata_dev_show_simple(field, format_string, cast) \
|
||||
static ssize_t \
|
||||
show_ata_dev_##field(struct device *dev, \
|
||||
struct device_attribute *attr, char *buf) \
|
||||
{ \
|
||||
struct ata_device *ata_dev = transport_class_to_dev(dev); \
|
||||
\
|
||||
return snprintf(buf, 20, format_string, cast ata_dev->field); \
|
||||
}
|
||||
|
||||
#define ata_dev_simple_attr(field, format_string, type) \
|
||||
ata_dev_show_simple(field, format_string, (type)) \
|
||||
static DEVICE_ATTR(field, S_IRUGO, \
|
||||
show_ata_dev_##field, NULL)
|
||||
|
||||
ata_dev_simple_attr(spdn_cnt, "%d\n", int);
|
||||
|
||||
struct ata_show_ering_arg {
|
||||
char* buf;
|
||||
int written;
|
||||
};
|
||||
|
||||
static int ata_show_ering(struct ata_ering_entry *ent, void *void_arg)
|
||||
{
|
||||
struct ata_show_ering_arg* arg = void_arg;
|
||||
struct timespec time;
|
||||
|
||||
jiffies_to_timespec(ent->timestamp,&time);
|
||||
arg->written += sprintf(arg->buf + arg->written,
|
||||
"[%5lu.%06lu]",
|
||||
time.tv_sec, time.tv_nsec);
|
||||
arg->written += get_ata_err_names(ent->err_mask,
|
||||
arg->buf + arg->written);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static ssize_t
|
||||
show_ata_dev_ering(struct device *dev,
|
||||
struct device_attribute *attr, char *buf)
|
||||
{
|
||||
struct ata_device *ata_dev = transport_class_to_dev(dev);
|
||||
struct ata_show_ering_arg arg = { buf, 0 };
|
||||
|
||||
ata_ering_map(&ata_dev->ering, ata_show_ering, &arg);
|
||||
return arg.written;
|
||||
}
|
||||
|
||||
|
||||
static DEVICE_ATTR(ering, S_IRUGO, show_ata_dev_ering, NULL);
|
||||
|
||||
static ssize_t
|
||||
show_ata_dev_id(struct device *dev,
|
||||
struct device_attribute *attr, char *buf)
|
||||
{
|
||||
struct ata_device *ata_dev = transport_class_to_dev(dev);
|
||||
int written = 0, i = 0;
|
||||
|
||||
if (ata_dev->class == ATA_DEV_PMP)
|
||||
return 0;
|
||||
for(i=0;i<ATA_ID_WORDS;i++) {
|
||||
written += snprintf(buf+written, 20, "%04x%c",
|
||||
ata_dev->id[i],
|
||||
((i+1) & 7) ? ' ' : '\n');
|
||||
}
|
||||
return written;
|
||||
}
|
||||
|
||||
static DEVICE_ATTR(id, S_IRUGO, show_ata_dev_id, NULL);
|
||||
|
||||
static ssize_t
|
||||
show_ata_dev_gscr(struct device *dev,
|
||||
struct device_attribute *attr, char *buf)
|
||||
{
|
||||
struct ata_device *ata_dev = transport_class_to_dev(dev);
|
||||
int written = 0, i = 0;
|
||||
|
||||
if (ata_dev->class != ATA_DEV_PMP)
|
||||
return 0;
|
||||
for(i=0;i<SATA_PMP_GSCR_DWORDS;i++) {
|
||||
written += snprintf(buf+written, 20, "%08x%c",
|
||||
ata_dev->gscr[i],
|
||||
((i+1) & 3) ? ' ' : '\n');
|
||||
}
|
||||
if (SATA_PMP_GSCR_DWORDS & 3)
|
||||
buf[written-1] = '\n';
|
||||
return written;
|
||||
}
|
||||
|
||||
static DEVICE_ATTR(gscr, S_IRUGO, show_ata_dev_gscr, NULL);
|
||||
|
||||
static DECLARE_TRANSPORT_CLASS(ata_dev_class,
|
||||
"ata_device", NULL, NULL, NULL);
|
||||
|
||||
static void ata_tdev_release(struct device *dev)
|
||||
{
|
||||
put_device(dev->parent);
|
||||
}
|
||||
|
||||
/**
|
||||
* ata_is_ata_dev -- check if a struct device represents a ATA device
|
||||
* @dev: device to check
|
||||
*
|
||||
* Returns:
|
||||
* %1 if the device represents a ATA device, %0 else
|
||||
*/
|
||||
int ata_is_ata_dev(const struct device *dev)
|
||||
{
|
||||
return dev->release == ata_tdev_release;
|
||||
}
|
||||
|
||||
static int ata_tdev_match(struct attribute_container *cont,
|
||||
struct device *dev)
|
||||
{
|
||||
struct ata_internal* i = to_ata_internal(ata_scsi_transport_template);
|
||||
if (!ata_is_ata_dev(dev))
|
||||
return 0;
|
||||
return &i->dev_attr_cont.ac == cont;
|
||||
}
|
||||
|
||||
/**
|
||||
* ata_tdev_free -- free a ATA LINK
|
||||
* @dev: ATA PHY to free
|
||||
*
|
||||
* Frees the specified ATA PHY.
|
||||
*
|
||||
* Note:
|
||||
* This function must only be called on a PHY that has not
|
||||
* successfully been added using ata_tdev_add().
|
||||
*/
|
||||
static void ata_tdev_free(struct ata_device *dev)
|
||||
{
|
||||
transport_destroy_device(&dev->tdev);
|
||||
put_device(&dev->tdev);
|
||||
}
|
||||
|
||||
/**
|
||||
* ata_tdev_delete -- remove ATA device
|
||||
* @port: ATA PORT to remove
|
||||
*
|
||||
* Removes the specified ATA device.
|
||||
*/
|
||||
static void ata_tdev_delete(struct ata_device *ata_dev)
|
||||
{
|
||||
struct device *dev = &ata_dev->tdev;
|
||||
|
||||
transport_remove_device(dev);
|
||||
device_del(dev);
|
||||
ata_tdev_free(ata_dev);
|
||||
}
|
||||
|
||||
|
||||
/**
|
||||
* ata_tdev_add -- initialize a transport ATA device structure.
|
||||
* @ata_dev: ata_dev structure.
|
||||
*
|
||||
* Initialize an ATA device structure for sysfs. It will be added in the
|
||||
* device tree below the ATA LINK device it belongs to.
|
||||
*
|
||||
* Returns %0 on success
|
||||
*/
|
||||
static int ata_tdev_add(struct ata_device *ata_dev)
|
||||
{
|
||||
struct device *dev = &ata_dev->tdev;
|
||||
struct ata_link *link = ata_dev->link;
|
||||
struct ata_port *ap = link->ap;
|
||||
int error;
|
||||
|
||||
device_initialize(dev);
|
||||
dev->parent = get_device(&link->tdev);
|
||||
dev->release = ata_tdev_release;
|
||||
if (ata_is_host_link(link))
|
||||
dev_set_name(dev, "dev%d.%d", ap->print_id,ata_dev->devno);
|
||||
else
|
||||
dev_set_name(dev, "dev%d.%d.0", ap->print_id, link->pmp);
|
||||
|
||||
transport_setup_device(dev);
|
||||
error = device_add(dev);
|
||||
if (error) {
|
||||
ata_tdev_free(ata_dev);
|
||||
return error;
|
||||
}
|
||||
|
||||
transport_add_device(dev);
|
||||
transport_configure_device(dev);
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* Setup / Teardown code
|
||||
*/
|
||||
|
||||
#define SETUP_TEMPLATE(attrb, field, perm, test) \
|
||||
i->private_##attrb[count] = dev_attr_##field; \
|
||||
i->private_##attrb[count].attr.mode = perm; \
|
||||
i->attrb[count] = &i->private_##attrb[count]; \
|
||||
if (test) \
|
||||
count++
|
||||
|
||||
#define SETUP_LINK_ATTRIBUTE(field) \
|
||||
SETUP_TEMPLATE(link_attrs, field, S_IRUGO, 1)
|
||||
|
||||
#define SETUP_PORT_ATTRIBUTE(field) \
|
||||
SETUP_TEMPLATE(port_attrs, field, S_IRUGO, 1)
|
||||
|
||||
#define SETUP_DEV_ATTRIBUTE(field) \
|
||||
SETUP_TEMPLATE(dev_attrs, field, S_IRUGO, 1)
|
||||
|
||||
/**
|
||||
* ata_attach_transport -- instantiate ATA transport template
|
||||
*/
|
||||
struct scsi_transport_template *ata_attach_transport(void)
|
||||
{
|
||||
struct ata_internal *i;
|
||||
int count;
|
||||
|
||||
i = kzalloc(sizeof(struct ata_internal), GFP_KERNEL);
|
||||
if (!i)
|
||||
return NULL;
|
||||
|
||||
i->t.eh_strategy_handler = ata_scsi_error;
|
||||
i->t.eh_timed_out = ata_scsi_timed_out;
|
||||
i->t.user_scan = ata_scsi_user_scan;
|
||||
|
||||
i->t.host_attrs.ac.attrs = &i->port_attrs[0];
|
||||
i->t.host_attrs.ac.class = &ata_port_class.class;
|
||||
i->t.host_attrs.ac.match = ata_tport_match;
|
||||
transport_container_register(&i->t.host_attrs);
|
||||
|
||||
i->link_attr_cont.ac.class = &ata_link_class.class;
|
||||
i->link_attr_cont.ac.attrs = &i->link_attrs[0];
|
||||
i->link_attr_cont.ac.match = ata_tlink_match;
|
||||
transport_container_register(&i->link_attr_cont);
|
||||
|
||||
i->dev_attr_cont.ac.class = &ata_dev_class.class;
|
||||
i->dev_attr_cont.ac.attrs = &i->dev_attrs[0];
|
||||
i->dev_attr_cont.ac.match = ata_tdev_match;
|
||||
transport_container_register(&i->dev_attr_cont);
|
||||
|
||||
count = 0;
|
||||
SETUP_PORT_ATTRIBUTE(nr_pmp_links);
|
||||
SETUP_PORT_ATTRIBUTE(idle_irq);
|
||||
BUG_ON(count > ATA_PORT_ATTRS);
|
||||
i->port_attrs[count] = NULL;
|
||||
|
||||
count = 0;
|
||||
SETUP_LINK_ATTRIBUTE(hw_sata_spd_limit);
|
||||
SETUP_LINK_ATTRIBUTE(sata_spd_limit);
|
||||
SETUP_LINK_ATTRIBUTE(sata_spd);
|
||||
BUG_ON(count > ATA_LINK_ATTRS);
|
||||
i->link_attrs[count] = NULL;
|
||||
|
||||
count = 0;
|
||||
SETUP_DEV_ATTRIBUTE(class);
|
||||
SETUP_DEV_ATTRIBUTE(pio_mode);
|
||||
SETUP_DEV_ATTRIBUTE(dma_mode);
|
||||
SETUP_DEV_ATTRIBUTE(xfer_mode);
|
||||
SETUP_DEV_ATTRIBUTE(spdn_cnt);
|
||||
SETUP_DEV_ATTRIBUTE(ering);
|
||||
SETUP_DEV_ATTRIBUTE(id);
|
||||
SETUP_DEV_ATTRIBUTE(gscr);
|
||||
BUG_ON(count > ATA_DEV_ATTRS);
|
||||
i->dev_attrs[count] = NULL;
|
||||
|
||||
return &i->t;
|
||||
}
|
||||
|
||||
/**
|
||||
* ata_release_transport -- release ATA transport template instance
|
||||
* @t: transport template instance
|
||||
*/
|
||||
void ata_release_transport(struct scsi_transport_template *t)
|
||||
{
|
||||
struct ata_internal *i = to_ata_internal(t);
|
||||
|
||||
transport_container_unregister(&i->t.host_attrs);
|
||||
transport_container_unregister(&i->link_attr_cont);
|
||||
transport_container_unregister(&i->dev_attr_cont);
|
||||
|
||||
kfree(i);
|
||||
}
|
||||
|
||||
__init int libata_transport_init(void)
|
||||
{
|
||||
int error;
|
||||
|
||||
error = transport_class_register(&ata_link_class);
|
||||
if (error)
|
||||
goto out_unregister_transport;
|
||||
error = transport_class_register(&ata_port_class);
|
||||
if (error)
|
||||
goto out_unregister_link;
|
||||
error = transport_class_register(&ata_dev_class);
|
||||
if (error)
|
||||
goto out_unregister_port;
|
||||
return 0;
|
||||
|
||||
out_unregister_port:
|
||||
transport_class_unregister(&ata_port_class);
|
||||
out_unregister_link:
|
||||
transport_class_unregister(&ata_link_class);
|
||||
out_unregister_transport:
|
||||
return error;
|
||||
|
||||
}
|
||||
|
||||
void __exit libata_transport_exit(void)
|
||||
{
|
||||
transport_class_unregister(&ata_link_class);
|
||||
transport_class_unregister(&ata_port_class);
|
||||
transport_class_unregister(&ata_dev_class);
|
||||
}
|
||||
|
|
@ -0,0 +1,18 @@
|
|||
#ifndef _LIBATA_TRANSPORT_H
|
||||
#define _LIBATA_TRANSPORT_H
|
||||
|
||||
|
||||
extern struct scsi_transport_template *ata_scsi_transport_template;
|
||||
|
||||
int ata_tlink_add(struct ata_link *link);
|
||||
void ata_tlink_delete(struct ata_link *link);
|
||||
|
||||
int ata_tport_add(struct device *parent, struct ata_port *ap);
|
||||
void ata_tport_delete(struct ata_port *ap);
|
||||
|
||||
struct scsi_transport_template *ata_attach_transport(void);
|
||||
void ata_release_transport(struct scsi_transport_template *t);
|
||||
|
||||
__init int libata_transport_init(void);
|
||||
void __exit libata_transport_exit(void);
|
||||
#endif
|
||||
|
|
@ -102,6 +102,7 @@ extern int ata_cmd_ioctl(struct scsi_device *scsidev, void __user *arg);
|
|||
extern struct ata_port *ata_port_alloc(struct ata_host *host);
|
||||
extern void ata_dev_enable_pm(struct ata_device *dev, enum link_pm policy);
|
||||
extern void ata_lpm_schedule(struct ata_port *ap, enum link_pm);
|
||||
extern const char *sata_spd_string(unsigned int spd);
|
||||
|
||||
/* libata-acpi.c */
|
||||
#ifdef CONFIG_ATA_ACPI
|
||||
|
|
@ -137,6 +138,9 @@ extern void ata_scsi_hotplug(struct work_struct *work);
|
|||
extern void ata_schedule_scsi_eh(struct Scsi_Host *shost);
|
||||
extern void ata_scsi_dev_rescan(struct work_struct *work);
|
||||
extern int ata_bus_probe(struct ata_port *ap);
|
||||
extern int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel,
|
||||
unsigned int id, unsigned int lun);
|
||||
|
||||
|
||||
/* libata-eh.c */
|
||||
extern unsigned long ata_internal_cmd_timeout(struct ata_device *dev, u8 cmd);
|
||||
|
|
@ -164,6 +168,9 @@ extern int ata_eh_recover(struct ata_port *ap, ata_prereset_fn_t prereset,
|
|||
ata_postreset_fn_t postreset,
|
||||
struct ata_link **r_failed_disk);
|
||||
extern void ata_eh_finish(struct ata_port *ap);
|
||||
extern int ata_ering_map(struct ata_ering *ering,
|
||||
int (*map_fn)(struct ata_ering_entry *, void *),
|
||||
void *arg);
|
||||
|
||||
/* libata-pmp.c */
|
||||
#ifdef CONFIG_SATA_PMP
|
||||
|
|
|
|||
|
|
@ -604,6 +604,7 @@ struct ata_device {
|
|||
union acpi_object *gtf_cache;
|
||||
unsigned int gtf_filter;
|
||||
#endif
|
||||
struct device tdev;
|
||||
/* n_sector is CLEAR_BEGIN, read comment above CLEAR_BEGIN */
|
||||
u64 n_sectors; /* size of device, if ATA */
|
||||
u64 n_native_sectors; /* native size, if ATA */
|
||||
|
|
@ -690,6 +691,7 @@ struct ata_link {
|
|||
struct ata_port *ap;
|
||||
int pmp; /* port multiplier port # */
|
||||
|
||||
struct device tdev;
|
||||
unsigned int active_tag; /* active tag on this link */
|
||||
u32 sactive; /* active NCQ commands */
|
||||
|
||||
|
|
@ -707,6 +709,8 @@ struct ata_link {
|
|||
|
||||
struct ata_device device[ATA_MAX_DEVICES];
|
||||
};
|
||||
#define ATA_LINK_CLEAR_BEGIN offsetof(struct ata_link, active_tag)
|
||||
#define ATA_LINK_CLEAR_END offsetof(struct ata_link, device[0])
|
||||
|
||||
struct ata_port {
|
||||
struct Scsi_Host *scsi_host; /* our co-allocated scsi host */
|
||||
|
|
@ -752,6 +756,7 @@ struct ata_port {
|
|||
struct ata_port_stats stats;
|
||||
struct ata_host *host;
|
||||
struct device *dev;
|
||||
struct device tdev;
|
||||
|
||||
struct mutex scsi_scan_mutex;
|
||||
struct delayed_work hotplug_task;
|
||||
|
|
|
|||
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