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Subject[git patches] libata updates for 2.6.37

Notable changes:

1) Link Power Management (LPM) rewrite

2) ATA transport class

3) Start hammering out support for >512-byte sectors



Please pull from 'upstream-linus' branch of
master.kernel.org:/pub/scm/linux/kernel/git/jgarzik/libata-dev.git upstream-linus

to receive the following updates:

Documentation/ABI/testing/sysfs-ata | 99 +++++
drivers/ata/Makefile | 2 +-
drivers/ata/ahci.c | 3 -
drivers/ata/ahci.h | 4 +-
drivers/ata/ahci_platform.c | 3 -
drivers/ata/ata_generic.c | 54 +++-
drivers/ata/ata_piix.c | 34 ++-
drivers/ata/libahci.c | 194 +++------
drivers/ata/libata-core.c | 389 ++++++++----------
drivers/ata/libata-eh.c | 254 ++++++++++--
drivers/ata/libata-pmp.c | 66 +++-
drivers/ata/libata-scsi.c | 204 +++++-----
drivers/ata/libata-sff.c | 14 +-
drivers/ata/libata-transport.c | 774 +++++++++++++++++++++++++++++++++++
drivers/ata/libata-transport.h | 18 +
drivers/ata/libata.h | 21 +-
drivers/ata/pata_bf54x.c | 6 +-
drivers/ata/pata_cmd640.c | 12 +
drivers/ata/pata_pdc202xx_old.c | 23 +
drivers/ata/pata_samsung_cf.c | 2 +-
drivers/ata/pata_scc.c | 4 +-
drivers/ata/pata_sil680.c | 16 +-
drivers/ata/pata_sl82c105.c | 11 +
drivers/ata/sata_fsl.c | 27 +-
drivers/ata/sata_inic162x.c | 2 +-
drivers/ata/sata_mv.c | 25 +-
drivers/ata/sata_nv.c | 57 +--
drivers/ata/sata_sil24.c | 14 +-
drivers/ata/sata_via.c | 2 +-
include/linux/ata.h | 46 ++-
include/linux/libata.h | 65 ++-
31 files changed, 1815 insertions(+), 630 deletions(-)
create mode 100644 Documentation/ABI/testing/sysfs-ata
create mode 100644 drivers/ata/libata-transport.c
create mode 100644 drivers/ata/libata-transport.h
Alan Cox (1):
ata: Intel IDE-R support

Andrea Gelmini (1):
include/linux/libata.h: fix typo

Ben Hutchings (1):
ata_piix: Add device ID for ICH4-L

Grant Grundler (1):
[libata] support for > 512 byte sectors (e.g. 4K Native)
Gwendal Grignou (1):
[libata] Add ATA transport class

Jeff Garzik (1):
drivers/ata/libata-transport.c: include linux/slab.h

Martin K. Petersen (1):
libata: Signal that our SATL supports WRITE SAME(16) with UNMAP

Mike Frysinger (1):
pata_bf54x: fix return type of bfin_set_devctl

Richard Kennedy (1):
libata: reorder ata_queued_cmd to remove alignment padding on 64 bit builds

Sergei Shtylyov (5):
pata_sil680: make sil680_sff_exec_command() 'static'
pata_cmd640: implement sff_irq_check() method
pata_pdc202xx_old: implement sff_irq_check() method
pata_sil680: implement sff_irq_check() method
pata_sl82c105: implement sff_irq_check() method

Tejun Heo (10):
libata: always use ata_qc_complete_multiple() for NCQ command completions
libata: clean up lpm related symbols and sysfs show/store functions
libata: implement sata_link_scr_lpm() and make ata_dev_set_feature() global
libata: reimplement link power management
libata: implement LPM support for port multipliers
ata_piix: implement LPM support
libata: add @ap to ata_wait_register() and introduce ata_msleep()
libata: implement cross-port EH exclusion
ata_piix: remove SIDPR locking
libahci: fix result_tf handling after an ATA PIO data-in command

Tony Luck (1):
[libata] Fix section mismatch: ata_sff_exit

Tracey Dent (1):
Drivers: ata: Makefile: replace the use of <module>-objs with <module>-y

diff --git a/Documentation/ABI/testing/sysfs-ata b/Documentation/ABI/testing/sysfs-ata
new file mode 100644
index 0000000..0a93215
--- /dev/null
+++ b/Documentation/ABI/testing/sysfs-ata
@@ -0,0 +1,99 @@
+What: /sys/class/ata_...
+Date: August 2008
+Contact: Gwendal Grignou<gwendal@google.com>
+Description:
+
+Provide a place in sysfs for storing the ATA topology of the system. This allows
+retrieving various information about ATA objects.
+
+Files under /sys/class/ata_port
+-------------------------------
+
+ For each port, a directory ataX is created where X is the ata_port_id of
+ the port. The device parent is the ata host device.
+
+idle_irq (read)
+
+ Number of IRQ received by the port while idle [some ata HBA only].
+
+nr_pmp_links (read)
+
+ If a SATA Port Multiplier (PM) is connected, number of link behind it.
+
+Files under /sys/class/ata_link
+-------------------------------
+
+ Behind each port, there is a ata_link. If there is a SATA PM in the
+ topology, 15 ata_link objects are created.
+
+ If a link is behind a port, the directory name is linkX, where X is
+ ata_port_id of the port.
+ If a link is behind a PM, its name is linkX.Y where X is ata_port_id
+ of the parent port and Y the PM port.
+
+hw_sata_spd_limit
+
+ Maximum speed supported by the connected SATA device.
+
+sata_spd_limit
+
+ Maximum speed imposed by libata.
+
+sata_spd
+
+ Current speed of the link [1.5, 3Gps,...].
+
+Files under /sys/class/ata_device
+---------------------------------
+
+ Behind each link, up to two ata device are created.
+ The name of the directory is devX[.Y].Z where:
+ - X is ata_port_id of the port where the device is connected,
+ - Y the port of the PM if any, and
+ - Z the device id: for PATA, there is usually 2 devices [0,1],
+ only 1 for SATA.
+
+class
+ Device class. Can be "ata" for disk, "atapi" for packet device,
+ "pmp" for PM, or "none" if no device was found behind the link.
+
+dma_mode
+
+ Transfer modes supported by the device when in DMA mode.
+ Mostly used by PATA device.
+
+pio_mode
+
+ Transfer modes supported by the device when in PIO mode.
+ Mostly used by PATA device.
+
+xfer_mode
+
+ Current transfer mode.
+
+id
+
+ Cached result of IDENTIFY command, as described in ATA8 7.16 and 7.17.
+ Only valid if the device is not a PM.
+
+gscr
+
+ Cached result of the dump of PM GSCR register.
+ Valid registers are:
+ 0: SATA_PMP_GSCR_PROD_ID,
+ 1: SATA_PMP_GSCR_REV,
+ 2: SATA_PMP_GSCR_PORT_INFO,
+ 32: SATA_PMP_GSCR_ERROR,
+ 33: SATA_PMP_GSCR_ERROR_EN,
+ 64: SATA_PMP_GSCR_FEAT,
+ 96: SATA_PMP_GSCR_FEAT_EN,
+ 130: SATA_PMP_GSCR_SII_GPIO
+ Only valid if the device is a PM.
+
+spdn_cnt
+
+ Number of time libata decided to lower the speed of link due to errors.
+
+ering
+
+ Formatted output of the error ring of the device.
diff --git a/drivers/ata/Makefile b/drivers/ata/Makefile
index d5df04a..c501af5 100644
--- a/drivers/ata/Makefile
+++ b/drivers/ata/Makefile
@@ -99,7 +99,7 @@ obj-$(CONFIG_ATA_GENERIC) += ata_generic.o
# Should be last libata driver
obj-$(CONFIG_PATA_LEGACY) += pata_legacy.o

-libata-objs := libata-core.o libata-scsi.o libata-eh.o
+libata-y := libata-core.o libata-scsi.o libata-eh.o libata-transport.o
libata-$(CONFIG_ATA_SFF) += libata-sff.o
libata-$(CONFIG_SATA_PMP) += libata-pmp.o
libata-$(CONFIG_ATA_ACPI) += libata-acpi.o
diff --git a/drivers/ata/ahci.c b/drivers/ata/ahci.c
index 99d0e5a..3288263 100644
--- a/drivers/ata/ahci.c
+++ b/drivers/ata/ahci.c
@@ -1208,9 +1208,6 @@ static int ahci_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
ata_port_pbar_desc(ap, AHCI_PCI_BAR,
0x100 + ap->port_no * 0x80, "port");

- /* set initial link pm policy */
- ap->pm_policy = NOT_AVAILABLE;
-
/* set enclosure management message type */
if (ap->flags & ATA_FLAG_EM)
ap->em_message_type = hpriv->em_msg_type;
diff --git a/drivers/ata/ahci.h b/drivers/ata/ahci.h
index e5fdeeb..329cbbb 100644
--- a/drivers/ata/ahci.h
+++ b/drivers/ata/ahci.h
@@ -72,6 +72,7 @@ enum {
AHCI_CMD_RESET = (1 << 8),
AHCI_CMD_CLR_BUSY = (1 << 10),

+ RX_FIS_PIO_SETUP = 0x20, /* offset of PIO Setup FIS data */
RX_FIS_D2H_REG = 0x40, /* offset of D2H Register FIS data */
RX_FIS_SDB = 0x58, /* offset of SDB FIS data */
RX_FIS_UNK = 0x60, /* offset of Unknown FIS data */
@@ -201,7 +202,6 @@ enum {
AHCI_HFLAG_MV_PATA = (1 << 4), /* PATA port */
AHCI_HFLAG_NO_MSI = (1 << 5), /* no PCI MSI */
AHCI_HFLAG_NO_PMP = (1 << 6), /* no PMP */
- AHCI_HFLAG_NO_HOTPLUG = (1 << 7), /* ignore PxSERR.DIAG.N */
AHCI_HFLAG_SECT255 = (1 << 8), /* max 255 sectors */
AHCI_HFLAG_YES_NCQ = (1 << 9), /* force NCQ cap on */
AHCI_HFLAG_NO_SUSPEND = (1 << 10), /* don't suspend */
@@ -216,7 +216,7 @@ enum {
AHCI_FLAG_COMMON = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY |
ATA_FLAG_MMIO | ATA_FLAG_PIO_DMA |
ATA_FLAG_ACPI_SATA | ATA_FLAG_AN |
- ATA_FLAG_IPM,
+ ATA_FLAG_LPM,

ICH_MAP = 0x90, /* ICH MAP register */

diff --git a/drivers/ata/ahci_platform.c b/drivers/ata/ahci_platform.c
index 84b6432..6fef1fa 100644
--- a/drivers/ata/ahci_platform.c
+++ b/drivers/ata/ahci_platform.c
@@ -129,9 +129,6 @@ static int __init ahci_probe(struct platform_device *pdev)
ata_port_desc(ap, "mmio %pR", mem);
ata_port_desc(ap, "port 0x%x", 0x100 + ap->port_no * 0x80);

- /* set initial link pm policy */
- ap->pm_policy = NOT_AVAILABLE;
-
/* set enclosure management message type */
if (ap->flags & ATA_FLAG_EM)
ap->em_message_type = hpriv->em_msg_type;
diff --git a/drivers/ata/ata_generic.c b/drivers/ata/ata_generic.c
index cc5f772..6981f76 100644
--- a/drivers/ata/ata_generic.c
+++ b/drivers/ata/ata_generic.c
@@ -35,6 +35,7 @@
enum {
ATA_GEN_CLASS_MATCH = (1 << 0),
ATA_GEN_FORCE_DMA = (1 << 1),
+ ATA_GEN_INTEL_IDER = (1 << 2),
};

/**
@@ -109,6 +110,49 @@ static struct ata_port_operations generic_port_ops = {
static int all_generic_ide; /* Set to claim all devices */

/**
+ * is_intel_ider - identify intel IDE-R devices
+ * @dev: PCI device
+ *
+ * Distinguish Intel IDE-R controller devices from other Intel IDE
+ * devices. IDE-R devices have no timing registers and are in
+ * most respects virtual. They should be driven by the ata_generic
+ * driver.
+ *
+ * IDE-R devices have PCI offset 0xF8.L as zero, later Intel ATA has
+ * it non zero. All Intel ATA has 0x40 writable (timing), but it is
+ * not writable on IDE-R devices (this is guaranteed).
+ */
+
+static int is_intel_ider(struct pci_dev *dev)
+{
+ /* For Intel IDE the value at 0xF8 is only zero on IDE-R
+ interfaces */
+ u32 r;
+ u16 t;
+
+ /* Check the manufacturing ID, it will be zero for IDE-R */
+ pci_read_config_dword(dev, 0xF8, &r);
+ /* Not IDE-R: punt so that ata_(old)piix gets it */
+ if (r != 0)
+ return 0;
+ /* 0xF8 will also be zero on some early Intel IDE devices
+ but they will have a sane timing register */
+ pci_read_config_word(dev, 0x40, &t);
+ if (t != 0)
+ return 0;
+ /* Finally check if the timing register is writable so that
+ we eliminate any early devices hot-docked in a docking
+ station */
+ pci_write_config_word(dev, 0x40, 1);
+ pci_read_config_word(dev, 0x40, &t);
+ if (t) {
+ pci_write_config_word(dev, 0x40, 0);
+ return 0;
+ }
+ return 1;
+}
+
+/**
* ata_generic_init - attach generic IDE
* @dev: PCI device found
* @id: match entry
@@ -134,6 +178,10 @@ static int ata_generic_init_one(struct pci_dev *dev, const struct pci_device_id
if ((id->driver_data & ATA_GEN_CLASS_MATCH) && all_generic_ide == 0)
return -ENODEV;

+ if (id->driver_data & ATA_GEN_INTEL_IDER)
+ if (!is_intel_ider(dev))
+ return -ENODEV;
+
/* Devices that need care */
if (dev->vendor == PCI_VENDOR_ID_UMC &&
dev->device == PCI_DEVICE_ID_UMC_UM8886A &&
@@ -186,7 +234,11 @@ static struct pci_device_id ata_generic[] = {
{ PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA,PCI_DEVICE_ID_TOSHIBA_PICCOLO_2), },
{ PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA,PCI_DEVICE_ID_TOSHIBA_PICCOLO_3), },
{ PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA,PCI_DEVICE_ID_TOSHIBA_PICCOLO_5), },
-#endif
+#endif
+ /* Intel, IDE class device */
+ { PCI_VENDOR_ID_INTEL, PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID,
+ PCI_CLASS_STORAGE_IDE << 8, 0xFFFFFF00UL,
+ .driver_data = ATA_GEN_INTEL_IDER },
/* Must come last. If you add entries adjust this table appropriately */
{ PCI_DEVICE_CLASS(PCI_CLASS_STORAGE_IDE << 8, 0xFFFFFF00UL),
.driver_data = ATA_GEN_CLASS_MATCH },
diff --git a/drivers/ata/ata_piix.c b/drivers/ata/ata_piix.c
index d712675..6cb14ca 100644
--- a/drivers/ata/ata_piix.c
+++ b/drivers/ata/ata_piix.c
@@ -158,7 +158,6 @@ struct piix_map_db {
struct piix_host_priv {
const int *map;
u32 saved_iocfg;
- spinlock_t sidpr_lock; /* FIXME: remove once locking in EH is fixed */
void __iomem *sidpr;
};

@@ -175,6 +174,8 @@ static int piix_sidpr_scr_read(struct ata_link *link,
unsigned int reg, u32 *val);
static int piix_sidpr_scr_write(struct ata_link *link,
unsigned int reg, u32 val);
+static int piix_sidpr_set_lpm(struct ata_link *link, enum ata_lpm_policy policy,
+ unsigned hints);
static bool piix_irq_check(struct ata_port *ap);
#ifdef CONFIG_PM
static int piix_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg);
@@ -209,6 +210,8 @@ static const struct pci_device_id piix_pci_tbl[] = {
{ 0x8086, 0x248A, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich_pata_100 },
/* Intel ICH3 (E7500/1) UDMA 100 */
{ 0x8086, 0x248B, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich_pata_100 },
+ /* Intel ICH4-L */
+ { 0x8086, 0x24C1, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich_pata_100 },
/* Intel ICH4 (i845GV, i845E, i852, i855) UDMA 100 */
{ 0x8086, 0x24CA, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich_pata_100 },
{ 0x8086, 0x24CB, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich_pata_100 },
@@ -348,11 +351,22 @@ static struct ata_port_operations ich_pata_ops = {
.set_dmamode = ich_set_dmamode,
};

+static struct device_attribute *piix_sidpr_shost_attrs[] = {
+ &dev_attr_link_power_management_policy,
+ NULL
+};
+
+static struct scsi_host_template piix_sidpr_sht = {
+ ATA_BMDMA_SHT(DRV_NAME),
+ .shost_attrs = piix_sidpr_shost_attrs,
+};
+
static struct ata_port_operations piix_sidpr_sata_ops = {
.inherits = &piix_sata_ops,
.hardreset = sata_std_hardreset,
.scr_read = piix_sidpr_scr_read,
.scr_write = piix_sidpr_scr_write,
+ .set_lpm = piix_sidpr_set_lpm,
};

static const struct piix_map_db ich5_map_db = {
@@ -956,15 +970,12 @@ static int piix_sidpr_scr_read(struct ata_link *link,
unsigned int reg, u32 *val)
{
struct piix_host_priv *hpriv = link->ap->host->private_data;
- unsigned long flags;

if (reg >= ARRAY_SIZE(piix_sidx_map))
return -EINVAL;

- spin_lock_irqsave(&hpriv->sidpr_lock, flags);
piix_sidpr_sel(link, reg);
*val = ioread32(hpriv->sidpr + PIIX_SIDPR_DATA);
- spin_unlock_irqrestore(&hpriv->sidpr_lock, flags);
return 0;
}

@@ -972,18 +983,21 @@ static int piix_sidpr_scr_write(struct ata_link *link,
unsigned int reg, u32 val)
{
struct piix_host_priv *hpriv = link->ap->host->private_data;
- unsigned long flags;

if (reg >= ARRAY_SIZE(piix_sidx_map))
return -EINVAL;

- spin_lock_irqsave(&hpriv->sidpr_lock, flags);
piix_sidpr_sel(link, reg);
iowrite32(val, hpriv->sidpr + PIIX_SIDPR_DATA);
- spin_unlock_irqrestore(&hpriv->sidpr_lock, flags);
return 0;
}

+static int piix_sidpr_set_lpm(struct ata_link *link, enum ata_lpm_policy policy,
+ unsigned hints)
+{
+ return sata_link_scr_lpm(link, policy, false);
+}
+
static bool piix_irq_check(struct ata_port *ap)
{
if (unlikely(!ap->ioaddr.bmdma_addr))
@@ -1543,6 +1557,7 @@ static int __devinit piix_init_one(struct pci_dev *pdev,
struct device *dev = &pdev->dev;
struct ata_port_info port_info[2];
const struct ata_port_info *ppi[] = { &port_info[0], &port_info[1] };
+ struct scsi_host_template *sht = &piix_sht;
unsigned long port_flags;
struct ata_host *host;
struct piix_host_priv *hpriv;
@@ -1577,7 +1592,6 @@ static int __devinit piix_init_one(struct pci_dev *pdev,
hpriv = devm_kzalloc(dev, sizeof(*hpriv), GFP_KERNEL);
if (!hpriv)
return -ENOMEM;
- spin_lock_init(&hpriv->sidpr_lock);

/* Save IOCFG, this will be used for cable detection, quirk
* detection and restoration on detach. This is necessary
@@ -1612,6 +1626,8 @@ static int __devinit piix_init_one(struct pci_dev *pdev,
rc = piix_init_sidpr(host);
if (rc)
return rc;
+ if (host->ports[0]->ops == &piix_sidpr_sata_ops)
+ sht = &piix_sidpr_sht;
}

/* apply IOCFG bit18 quirk */
@@ -1638,7 +1654,7 @@ static int __devinit piix_init_one(struct pci_dev *pdev,
host->flags |= ATA_HOST_PARALLEL_SCAN;

pci_set_master(pdev);
- return ata_pci_sff_activate_host(host, ata_bmdma_interrupt, &piix_sht);
+ return ata_pci_sff_activate_host(host, ata_bmdma_interrupt, sht);
}

static void piix_remove_one(struct pci_dev *pdev)
diff --git a/drivers/ata/libahci.c b/drivers/ata/libahci.c
index 8eea309..ebc08d6 100644
--- a/drivers/ata/libahci.c
+++ b/drivers/ata/libahci.c
@@ -56,9 +56,8 @@ MODULE_PARM_DESC(skip_host_reset, "skip global host reset (0=don't skip, 1=skip)
module_param_named(ignore_sss, ahci_ignore_sss, int, 0444);
MODULE_PARM_DESC(ignore_sss, "Ignore staggered spinup flag (0=don't ignore, 1=ignore)");

-static int ahci_enable_alpm(struct ata_port *ap,
- enum link_pm policy);
-static void ahci_disable_alpm(struct ata_port *ap);
+static int ahci_set_lpm(struct ata_link *link, enum ata_lpm_policy policy,
+ unsigned hints);
static ssize_t ahci_led_show(struct ata_port *ap, char *buf);
static ssize_t ahci_led_store(struct ata_port *ap, const char *buf,
size_t size);
@@ -164,8 +163,7 @@ struct ata_port_operations ahci_ops = {
.pmp_attach = ahci_pmp_attach,
.pmp_detach = ahci_pmp_detach,

- .enable_pm = ahci_enable_alpm,
- .disable_pm = ahci_disable_alpm,
+ .set_lpm = ahci_set_lpm,
.em_show = ahci_led_show,
.em_store = ahci_led_store,
.sw_activity_show = ahci_activity_show,
@@ -569,7 +567,7 @@ int ahci_stop_engine(struct ata_port *ap)
writel(tmp, port_mmio + PORT_CMD);

/* wait for engine to stop. This could be as long as 500 msec */
- tmp = ata_wait_register(port_mmio + PORT_CMD,
+ tmp = ata_wait_register(ap, port_mmio + PORT_CMD,
PORT_CMD_LIST_ON, PORT_CMD_LIST_ON, 1, 500);
if (tmp & PORT_CMD_LIST_ON)
return -EIO;
@@ -616,7 +614,7 @@ static int ahci_stop_fis_rx(struct ata_port *ap)
writel(tmp, port_mmio + PORT_CMD);

/* wait for completion, spec says 500ms, give it 1000 */
- tmp = ata_wait_register(port_mmio + PORT_CMD, PORT_CMD_FIS_ON,
+ tmp = ata_wait_register(ap, port_mmio + PORT_CMD, PORT_CMD_FIS_ON,
PORT_CMD_FIS_ON, 10, 1000);
if (tmp & PORT_CMD_FIS_ON)
return -EBUSY;
@@ -642,127 +640,56 @@ static void ahci_power_up(struct ata_port *ap)
writel(cmd | PORT_CMD_ICC_ACTIVE, port_mmio + PORT_CMD);
}

-static void ahci_disable_alpm(struct ata_port *ap)
+static int ahci_set_lpm(struct ata_link *link, enum ata_lpm_policy policy,
+ unsigned int hints)
{
+ struct ata_port *ap = link->ap;
struct ahci_host_priv *hpriv = ap->host->private_data;
- void __iomem *port_mmio = ahci_port_base(ap);
- u32 cmd;
struct ahci_port_priv *pp = ap->private_data;
-
- /* IPM bits should be disabled by libata-core */
- /* get the existing command bits */
- cmd = readl(port_mmio + PORT_CMD);
-
- /* disable ALPM and ASP */
- cmd &= ~PORT_CMD_ASP;
- cmd &= ~PORT_CMD_ALPE;
-
- /* force the interface back to active */
- cmd |= PORT_CMD_ICC_ACTIVE;
-
- /* write out new cmd value */
- writel(cmd, port_mmio + PORT_CMD);
- cmd = readl(port_mmio + PORT_CMD);
-
- /* wait 10ms to be sure we've come out of any low power state */
- msleep(10);
-
- /* clear out any PhyRdy stuff from interrupt status */
- writel(PORT_IRQ_PHYRDY, port_mmio + PORT_IRQ_STAT);
-
- /* go ahead and clean out PhyRdy Change from Serror too */
- ahci_scr_write(&ap->link, SCR_ERROR, ((1 << 16) | (1 << 18)));
-
- /*
- * Clear flag to indicate that we should ignore all PhyRdy
- * state changes
- */
- hpriv->flags &= ~AHCI_HFLAG_NO_HOTPLUG;
-
- /*
- * Enable interrupts on Phy Ready.
- */
- pp->intr_mask |= PORT_IRQ_PHYRDY;
- writel(pp->intr_mask, port_mmio + PORT_IRQ_MASK);
-
- /*
- * don't change the link pm policy - we can be called
- * just to turn of link pm temporarily
- */
-}
-
-static int ahci_enable_alpm(struct ata_port *ap,
- enum link_pm policy)
-{
- struct ahci_host_priv *hpriv = ap->host->private_data;
void __iomem *port_mmio = ahci_port_base(ap);
- u32 cmd;
- struct ahci_port_priv *pp = ap->private_data;
- u32 asp;

- /* Make sure the host is capable of link power management */
- if (!(hpriv->cap & HOST_CAP_ALPM))
- return -EINVAL;
-
- switch (policy) {
- case MAX_PERFORMANCE:
- case NOT_AVAILABLE:
+ if (policy != ATA_LPM_MAX_POWER) {
/*
- * if we came here with NOT_AVAILABLE,
- * it just means this is the first time we
- * have tried to enable - default to max performance,
- * and let the user go to lower power modes on request.
+ * Disable interrupts on Phy Ready. This keeps us from
+ * getting woken up due to spurious phy ready
+ * interrupts.
*/
- ahci_disable_alpm(ap);
- return 0;
- case MIN_POWER:
- /* configure HBA to enter SLUMBER */
- asp = PORT_CMD_ASP;
- break;
- case MEDIUM_POWER:
- /* configure HBA to enter PARTIAL */
- asp = 0;
- break;
- default:
- return -EINVAL;
+ pp->intr_mask &= ~PORT_IRQ_PHYRDY;
+ writel(pp->intr_mask, port_mmio + PORT_IRQ_MASK);
+
+ sata_link_scr_lpm(link, policy, false);
}

- /*
- * Disable interrupts on Phy Ready. This keeps us from
- * getting woken up due to spurious phy ready interrupts
- * TBD - Hot plug should be done via polling now, is
- * that even supported?
- */
- pp->intr_mask &= ~PORT_IRQ_PHYRDY;
- writel(pp->intr_mask, port_mmio + PORT_IRQ_MASK);
+ if (hpriv->cap & HOST_CAP_ALPM) {
+ u32 cmd = readl(port_mmio + PORT_CMD);

- /*
- * Set a flag to indicate that we should ignore all PhyRdy
- * state changes since these can happen now whenever we
- * change link state
- */
- hpriv->flags |= AHCI_HFLAG_NO_HOTPLUG;
+ if (policy == ATA_LPM_MAX_POWER || !(hints & ATA_LPM_HIPM)) {
+ cmd &= ~(PORT_CMD_ASP | PORT_CMD_ALPE);
+ cmd |= PORT_CMD_ICC_ACTIVE;

- /* get the existing command bits */
- cmd = readl(port_mmio + PORT_CMD);
+ writel(cmd, port_mmio + PORT_CMD);
+ readl(port_mmio + PORT_CMD);

- /*
- * Set ASP based on Policy
- */
- cmd |= asp;
+ /* wait 10ms to be sure we've come out of LPM state */
+ ata_msleep(ap, 10);
+ } else {
+ cmd |= PORT_CMD_ALPE;
+ if (policy == ATA_LPM_MIN_POWER)
+ cmd |= PORT_CMD_ASP;

- /*
- * Setting this bit will instruct the HBA to aggressively
- * enter a lower power link state when it's appropriate and
- * based on the value set above for ASP
- */
- cmd |= PORT_CMD_ALPE;
+ /* write out new cmd value */
+ writel(cmd, port_mmio + PORT_CMD);
+ }
+ }

- /* write out new cmd value */
- writel(cmd, port_mmio + PORT_CMD);
- cmd = readl(port_mmio + PORT_CMD);
+ if (policy == ATA_LPM_MAX_POWER) {
+ sata_link_scr_lpm(link, policy, false);
+
+ /* turn PHYRDY IRQ back on */
+ pp->intr_mask |= PORT_IRQ_PHYRDY;
+ writel(pp->intr_mask, port_mmio + PORT_IRQ_MASK);
+ }

- /* IPM bits should be set by libata-core */
return 0;
}

@@ -813,7 +740,7 @@ static void ahci_start_port(struct ata_port *ap)
emp->led_state,
4);
if (rc == -EBUSY)
- msleep(1);
+ ata_msleep(ap, 1);
else
break;
}
@@ -872,7 +799,7 @@ int ahci_reset_controller(struct ata_host *host)
* reset must complete within 1 second, or
* the hardware should be considered fried.
*/
- tmp = ata_wait_register(mmio + HOST_CTL, HOST_RESET,
+ tmp = ata_wait_register(NULL, mmio + HOST_CTL, HOST_RESET,
HOST_RESET, 10, 1000);

if (tmp & HOST_RESET) {
@@ -1252,7 +1179,7 @@ int ahci_kick_engine(struct ata_port *ap)
writel(tmp, port_mmio + PORT_CMD);

rc = 0;
- tmp = ata_wait_register(port_mmio + PORT_CMD,
+ tmp = ata_wait_register(ap, port_mmio + PORT_CMD,
PORT_CMD_CLO, PORT_CMD_CLO, 1, 500);
if (tmp & PORT_CMD_CLO)
rc = -EIO;
@@ -1282,8 +1209,8 @@ static int ahci_exec_polled_cmd(struct ata_port *ap, int pmp,
writel(1, port_mmio + PORT_CMD_ISSUE);

if (timeout_msec) {
- tmp = ata_wait_register(port_mmio + PORT_CMD_ISSUE, 0x1, 0x1,
- 1, timeout_msec);
+ tmp = ata_wait_register(ap, port_mmio + PORT_CMD_ISSUE,
+ 0x1, 0x1, 1, timeout_msec);
if (tmp & 0x1) {
ahci_kick_engine(ap);
return -EBUSY;
@@ -1330,7 +1257,7 @@ int ahci_do_softreset(struct ata_link *link, unsigned int *class,
}

/* spec says at least 5us, but be generous and sleep for 1ms */
- msleep(1);
+ ata_msleep(ap, 1);

/* issue the second D2H Register FIS */
tf.ctl &= ~ATA_SRST;
@@ -1660,15 +1587,10 @@ static void ahci_port_intr(struct ata_port *ap)
if (unlikely(resetting))
status &= ~PORT_IRQ_BAD_PMP;

- /* If we are getting PhyRdy, this is
- * just a power state change, we should
- * clear out this, plus the PhyRdy/Comm
- * Wake bits from Serror
- */
- if ((hpriv->flags & AHCI_HFLAG_NO_HOTPLUG) &&
- (status & PORT_IRQ_PHYRDY)) {
+ /* if LPM is enabled, PHYRDY doesn't mean anything */
+ if (ap->link.lpm_policy > ATA_LPM_MAX_POWER) {
status &= ~PORT_IRQ_PHYRDY;
- ahci_scr_write(&ap->link, SCR_ERROR, ((1 << 16) | (1 << 18)));
+ ahci_scr_write(&ap->link, SCR_ERROR, SERR_PHYRDY_CHG);
}

if (unlikely(status & PORT_IRQ_ERROR)) {
@@ -1830,12 +1752,24 @@ static unsigned int ahci_qc_issue(struct ata_queued_cmd *qc)
static bool ahci_qc_fill_rtf(struct ata_queued_cmd *qc)
{
struct ahci_port_priv *pp = qc->ap->private_data;
- u8 *d2h_fis = pp->rx_fis + RX_FIS_D2H_REG;
+ u8 *rx_fis = pp->rx_fis;

if (pp->fbs_enabled)
- d2h_fis += qc->dev->link->pmp * AHCI_RX_FIS_SZ;
+ rx_fis += qc->dev->link->pmp * AHCI_RX_FIS_SZ;
+
+ /*
+ * After a successful execution of an ATA PIO data-in command,
+ * the device doesn't send D2H Reg FIS to update the TF and
+ * the host should take TF and E_Status from the preceding PIO
+ * Setup FIS.
+ */
+ if (qc->tf.protocol == ATA_PROT_PIO && qc->dma_dir == DMA_FROM_DEVICE &&
+ !(qc->flags & ATA_QCFLAG_FAILED)) {
+ ata_tf_from_fis(rx_fis + RX_FIS_PIO_SETUP, &qc->result_tf);
+ qc->result_tf.command = (rx_fis + RX_FIS_PIO_SETUP)[15];
+ } else
+ ata_tf_from_fis(rx_fis + RX_FIS_D2H_REG, &qc->result_tf);

- ata_tf_from_fis(d2h_fis, &qc->result_tf);
return true;
}

diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index 932eaee..7f77c67 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -68,7 +68,7 @@
#include <linux/ratelimit.h>

#include "libata.h"
-
+#include "libata-transport.h"

/* debounce timing parameters in msecs { interval, duration, timeout } */
const unsigned long sata_deb_timing_normal[] = { 5, 100, 2000 };
@@ -91,8 +91,6 @@ const struct ata_port_operations sata_port_ops = {
static unsigned int ata_dev_init_params(struct ata_device *dev,
u16 heads, u16 sectors);
static unsigned int ata_dev_set_xfermode(struct ata_device *dev);
-static unsigned int ata_dev_set_feature(struct ata_device *dev,
- u8 enable, u8 feature);
static void ata_dev_xfermask(struct ata_device *dev);
static unsigned long ata_dev_blacklisted(const struct ata_device *dev);

@@ -1017,7 +1015,7 @@ const char *ata_mode_string(unsigned long xfer_mask)
return "<n/a>";
}

-static const char *sata_spd_string(unsigned int spd)
+const char *sata_spd_string(unsigned int spd)
{
static const char * const spd_str[] = {
"1.5 Gbps",
@@ -1030,182 +1028,6 @@ static const char *sata_spd_string(unsigned int spd)
return spd_str[spd - 1];
}

-static int ata_dev_set_dipm(struct ata_device *dev, enum link_pm policy)
-{
- struct ata_link *link = dev->link;
- struct ata_port *ap = link->ap;
- u32 scontrol;
- unsigned int err_mask;
- int rc;
-
- /*
- * disallow DIPM for drivers which haven't set
- * ATA_FLAG_IPM. This is because when DIPM is enabled,
- * phy ready will be set in the interrupt status on
- * state changes, which will cause some drivers to
- * think there are errors - additionally drivers will
- * need to disable hot plug.
- */
- if (!(ap->flags & ATA_FLAG_IPM) || !ata_dev_enabled(dev)) {
- ap->pm_policy = NOT_AVAILABLE;
- return -EINVAL;
- }
-
- /*
- * For DIPM, we will only enable it for the
- * min_power setting.
- *
- * Why? Because Disks are too stupid to know that
- * If the host rejects a request to go to SLUMBER
- * they should retry at PARTIAL, and instead it
- * just would give up. So, for medium_power to
- * work at all, we need to only allow HIPM.
- */
- rc = sata_scr_read(link, SCR_CONTROL, &scontrol);
- if (rc)
- return rc;
-
- switch (policy) {
- case MIN_POWER:
- /* no restrictions on IPM transitions */
- scontrol &= ~(0x3 << 8);
- rc = sata_scr_write(link, SCR_CONTROL, scontrol);
- if (rc)
- return rc;
-
- /* enable DIPM */
- if (dev->flags & ATA_DFLAG_DIPM)
- err_mask = ata_dev_set_feature(dev,
- SETFEATURES_SATA_ENABLE, SATA_DIPM);
- break;
- case MEDIUM_POWER:
- /* allow IPM to PARTIAL */
- scontrol &= ~(0x1 << 8);
- scontrol |= (0x2 << 8);
- rc = sata_scr_write(link, SCR_CONTROL, scontrol);
- if (rc)
- return rc;
-
- /*
- * we don't have to disable DIPM since IPM flags
- * disallow transitions to SLUMBER, which effectively
- * disable DIPM if it does not support PARTIAL
- */
- break;
- case NOT_AVAILABLE:
- case MAX_PERFORMANCE:
- /* disable all IPM transitions */
- scontrol |= (0x3 << 8);
- rc = sata_scr_write(link, SCR_CONTROL, scontrol);
- if (rc)
- return rc;
-
- /*
- * we don't have to disable DIPM since IPM flags
- * disallow all transitions which effectively
- * disable DIPM anyway.
- */
- break;
- }
-
- /* FIXME: handle SET FEATURES failure */
- (void) err_mask;
-
- return 0;
-}
-
-/**
- * ata_dev_enable_pm - enable SATA interface power management
- * @dev: device to enable power management
- * @policy: the link power management policy
- *
- * Enable SATA Interface power management. This will enable
- * Device Interface Power Management (DIPM) for min_power
- * policy, and then call driver specific callbacks for
- * enabling Host Initiated Power management.
- *
- * Locking: Caller.
- * Returns: -EINVAL if IPM is not supported, 0 otherwise.
- */
-void ata_dev_enable_pm(struct ata_device *dev, enum link_pm policy)
-{
- int rc = 0;
- struct ata_port *ap = dev->link->ap;
-
- /* set HIPM first, then DIPM */
- if (ap->ops->enable_pm)
- rc = ap->ops->enable_pm(ap, policy);
- if (rc)
- goto enable_pm_out;
- rc = ata_dev_set_dipm(dev, policy);
-
-enable_pm_out:
- if (rc)
- ap->pm_policy = MAX_PERFORMANCE;
- else
- ap->pm_policy = policy;
- return /* rc */; /* hopefully we can use 'rc' eventually */
-}
-
-#ifdef CONFIG_PM
-/**
- * ata_dev_disable_pm - disable SATA interface power management
- * @dev: device to disable power management
- *
- * Disable SATA Interface power management. This will disable
- * Device Interface Power Management (DIPM) without changing
- * policy, call driver specific callbacks for disabling Host
- * Initiated Power management.
- *
- * Locking: Caller.
- * Returns: void
- */
-static void ata_dev_disable_pm(struct ata_device *dev)
-{
- struct ata_port *ap = dev->link->ap;
-
- ata_dev_set_dipm(dev, MAX_PERFORMANCE);
- if (ap->ops->disable_pm)
- ap->ops->disable_pm(ap);
-}
-#endif /* CONFIG_PM */
-
-void ata_lpm_schedule(struct ata_port *ap, enum link_pm policy)
-{
- ap->pm_policy = policy;
- ap->link.eh_info.action |= ATA_EH_LPM;
- ap->link.eh_info.flags |= ATA_EHI_NO_AUTOPSY;
- ata_port_schedule_eh(ap);
-}
-
-#ifdef CONFIG_PM
-static void ata_lpm_enable(struct ata_host *host)
-{
- struct ata_link *link;
- struct ata_port *ap;
- struct ata_device *dev;
- int i;
-
- for (i = 0; i < host->n_ports; i++) {
- ap = host->ports[i];
- ata_for_each_link(link, ap, EDGE) {
- ata_for_each_dev(dev, link, ALL)
- ata_dev_disable_pm(dev);
- }
- }
-}
-
-static void ata_lpm_disable(struct ata_host *host)
-{
- int i;
-
- for (i = 0; i < host->n_ports; i++) {
- struct ata_port *ap = host->ports[i];
- ata_lpm_schedule(ap, ap->pm_policy);
- }
-}
-#endif /* CONFIG_PM */
-
/**
* ata_dev_classify - determine device type based on ATA-spec signature
* @tf: ATA taskfile register set for device to be identified
@@ -1806,8 +1628,14 @@ unsigned ata_exec_internal_sg(struct ata_device *dev,
}
}

+ if (ap->ops->error_handler)
+ ata_eh_release(ap);
+
rc = wait_for_completion_timeout(&wait, msecs_to_jiffies(timeout));

+ if (ap->ops->error_handler)
+ ata_eh_acquire(ap);
+
ata_sff_flush_pio_task(ap);

if (!rc) {
@@ -2564,13 +2392,6 @@ int ata_dev_configure(struct ata_device *dev)
if (dev->flags & ATA_DFLAG_LBA48)
dev->max_sectors = ATA_MAX_SECTORS_LBA48;

- if (!(dev->horkage & ATA_HORKAGE_IPM)) {
- if (ata_id_has_hipm(dev->id))
- dev->flags |= ATA_DFLAG_HIPM;
- if (ata_id_has_dipm(dev->id))
- dev->flags |= ATA_DFLAG_DIPM;
- }
-
/* Limit PATA drive on SATA cable bridge transfers to udma5,
200 sectors */
if (ata_dev_knobble(dev)) {
@@ -2591,13 +2412,6 @@ int ata_dev_configure(struct ata_device *dev)
dev->max_sectors = min_t(unsigned int, ATA_MAX_SECTORS_128,
dev->max_sectors);

- if (ata_dev_blacklisted(dev) & ATA_HORKAGE_IPM) {
- dev->horkage |= ATA_HORKAGE_IPM;
-
- /* reset link pm_policy for this port to no pm */
- ap->pm_policy = MAX_PERFORMANCE;
- }
-
if (ap->ops->dev_config)
ap->ops->dev_config(dev);

@@ -3596,7 +3410,7 @@ int ata_wait_ready(struct ata_link *link, unsigned long deadline,
warned = 1;
}

- msleep(50);
+ ata_msleep(link->ap, 50);
}
}

@@ -3617,7 +3431,7 @@ int ata_wait_ready(struct ata_link *link, unsigned long deadline,
int ata_wait_after_reset(struct ata_link *link, unsigned long deadline,
int (*check_ready)(struct ata_link *link))
{
- msleep(ATA_WAIT_AFTER_RESET);
+ ata_msleep(link->ap, ATA_WAIT_AFTER_RESET);

return ata_wait_ready(link, deadline, check_ready);
}
@@ -3628,7 +3442,7 @@ int ata_wait_after_reset(struct ata_link *link, unsigned long deadline,
* @params: timing parameters { interval, duratinon, timeout } in msec
* @deadline: deadline jiffies for the operation
*
-* Make sure SStatus of @link reaches stable state, determined by
+ * Make sure SStatus of @link reaches stable state, determined by
* holding the same value where DET is not 1 for @duration polled
* every @interval, before @timeout. Timeout constraints the
* beginning of the stable state. Because DET gets stuck at 1 on
@@ -3665,7 +3479,7 @@ int sata_link_debounce(struct ata_link *link, const unsigned long *params,
last_jiffies = jiffies;

while (1) {
- msleep(interval);
+ ata_msleep(link->ap, interval);
if ((rc = sata_scr_read(link, SCR_STATUS, &cur)))
return rc;
cur &= 0xf;
@@ -3730,7 +3544,7 @@ int sata_link_resume(struct ata_link *link, const unsigned long *params,
* immediately after resuming. Delay 200ms before
* debouncing.
*/
- msleep(200);
+ ata_msleep(link->ap, 200);

/* is SControl restored correctly? */
if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol)))
@@ -3760,6 +3574,72 @@ int sata_link_resume(struct ata_link *link, const unsigned long *params,
}

/**
+ * sata_link_scr_lpm - manipulate SControl IPM and SPM fields
+ * @link: ATA link to manipulate SControl for
+ * @policy: LPM policy to configure
+ * @spm_wakeup: initiate LPM transition to active state
+ *
+ * Manipulate the IPM field of the SControl register of @link
+ * according to @policy. If @policy is ATA_LPM_MAX_POWER and
+ * @spm_wakeup is %true, the SPM field is manipulated to wake up
+ * the link. This function also clears PHYRDY_CHG before
+ * returning.
+ *
+ * LOCKING:
+ * EH context.
+ *
+ * RETURNS:
+ * 0 on succes, -errno otherwise.
+ */
+int sata_link_scr_lpm(struct ata_link *link, enum ata_lpm_policy policy,
+ bool spm_wakeup)
+{
+ struct ata_eh_context *ehc = &link->eh_context;
+ bool woken_up = false;
+ u32 scontrol;
+ int rc;
+
+ rc = sata_scr_read(link, SCR_CONTROL, &scontrol);
+ if (rc)
+ return rc;
+
+ switch (policy) {
+ case ATA_LPM_MAX_POWER:
+ /* disable all LPM transitions */
+ scontrol |= (0x3 << 8);
+ /* initiate transition to active state */
+ if (spm_wakeup) {
+ scontrol |= (0x4 << 12);
+ woken_up = true;
+ }
+ break;
+ case ATA_LPM_MED_POWER:
+ /* allow LPM to PARTIAL */
+ scontrol &= ~(0x1 << 8);
+ scontrol |= (0x2 << 8);
+ break;
+ case ATA_LPM_MIN_POWER:
+ /* no restrictions on LPM transitions */
+ scontrol &= ~(0x3 << 8);
+ break;
+ default:
+ WARN_ON(1);
+ }
+
+ rc = sata_scr_write(link, SCR_CONTROL, scontrol);
+ if (rc)
+ return rc;
+
+ /* give the link time to transit out of LPM state */
+ if (woken_up)
+ msleep(10);
+
+ /* clear PHYRDY_CHG from SError */
+ ehc->i.serror &= ~SERR_PHYRDY_CHG;
+ return sata_scr_write(link, SCR_ERROR, SERR_PHYRDY_CHG);
+}
+
+/**
* ata_std_prereset - prepare for reset
* @link: ATA link to be reset
* @deadline: deadline jiffies for the operation
@@ -3868,7 +3748,7 @@ int sata_link_hardreset(struct ata_link *link, const unsigned long *timing,
/* Couldn't find anything in SATA I/II specs, but AHCI-1.1
* 10.4.2 says at least 1 ms.
*/
- msleep(1);
+ ata_msleep(link->ap, 1);

/* bring link back */
rc = sata_link_resume(link, timing, deadline);
@@ -4551,6 +4431,7 @@ static unsigned int ata_dev_set_xfermode(struct ata_device *dev)
DPRINTK("EXIT, err_mask=%x\n", err_mask);
return err_mask;
}
+
/**
* ata_dev_set_feature - Issue SET FEATURES - SATA FEATURES
* @dev: Device to which command will be sent
@@ -4566,8 +4447,7 @@ static unsigned int ata_dev_set_xfermode(struct ata_device *dev)
* RETURNS:
* 0 on success, AC_ERR_* mask otherwise.
*/
-static unsigned int ata_dev_set_feature(struct ata_device *dev, u8 enable,
- u8 feature)
+unsigned int ata_dev_set_feature(struct ata_device *dev, u8 enable, u8 feature)
{
struct ata_taskfile tf;
unsigned int err_mask;
@@ -4943,8 +4823,13 @@ static void ata_verify_xfer(struct ata_queued_cmd *qc)
* ata_qc_complete - Complete an active ATA command
* @qc: Command to complete
*
- * Indicate to the mid and upper layers that an ATA
- * command has completed, with either an ok or not-ok status.
+ * Indicate to the mid and upper layers that an ATA command has
+ * completed, with either an ok or not-ok status.
+ *
+ * Refrain from calling this function multiple times when
+ * successfully completing multiple NCQ commands.
+ * ata_qc_complete_multiple() should be used instead, which will
+ * properly update IRQ expect state.
*
* LOCKING:
* spin_lock_irqsave(host lock)
@@ -5037,6 +4922,10 @@ void ata_qc_complete(struct ata_queued_cmd *qc)
* requests normally. ap->qc_active and @qc_active is compared
* and commands are completed accordingly.
*
+ * Always use this function when completing multiple NCQ commands
+ * from IRQ handlers instead of calling ata_qc_complete()
+ * multiple times to keep IRQ expect status properly in sync.
+ *
* LOCKING:
* spin_lock_irqsave(host lock)
*
@@ -5422,12 +5311,6 @@ int ata_host_suspend(struct ata_host *host, pm_message_t mesg)
int rc;

/*
- * disable link pm on all ports before requesting
- * any pm activity
- */
- ata_lpm_enable(host);
-
- /*
* On some hardware, device fails to respond after spun down
* for suspend. As the device won't be used before being
* resumed, we don't need to touch the device. Ask EH to skip
@@ -5460,9 +5343,6 @@ void ata_host_resume(struct ata_host *host)
ata_host_request_pm(host, PMSG_ON, ATA_EH_RESET,
ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET, 0);
host->dev->power.power_state = PMSG_ON;
-
- /* reenable link pm */
- ata_lpm_disable(host);
}
#endif

@@ -5517,7 +5397,8 @@ void ata_link_init(struct ata_port *ap, struct ata_link *link, int pmp)
int i;

/* clear everything except for devices */
- memset(link, 0, offsetof(struct ata_link, device[0]));
+ memset((void *)link + ATA_LINK_CLEAR_BEGIN, 0,
+ ATA_LINK_CLEAR_END - ATA_LINK_CLEAR_BEGIN);

link->ap = ap;
link->pmp = pmp;
@@ -5591,7 +5472,7 @@ struct ata_port *ata_port_alloc(struct ata_host *host)
ap = kzalloc(sizeof(*ap), GFP_KERNEL);
if (!ap)
return NULL;
-
+
ap->pflags |= ATA_PFLAG_INITIALIZING;
ap->lock = &host->lock;
ap->print_id = -1;
@@ -5695,6 +5576,7 @@ struct ata_host *ata_host_alloc(struct device *dev, int max_ports)
dev_set_drvdata(dev, host);

spin_lock_init(&host->lock);
+ mutex_init(&host->eh_mutex);
host->dev = dev;
host->n_ports = max_ports;

@@ -5992,6 +5874,7 @@ void ata_host_init(struct ata_host *host, struct device *dev,
unsigned long flags, struct ata_port_operations *ops)
{
spin_lock_init(&host->lock);
+ mutex_init(&host->eh_mutex);
host->dev = dev;
host->flags = flags;
host->ops = ops;
@@ -6022,7 +5905,7 @@ static void async_port_probe(void *data, async_cookie_t cookie)
spin_lock_irqsave(ap->lock, flags);

ehi->probe_mask |= ATA_ALL_DEVICES;
- ehi->action |= ATA_EH_RESET | ATA_EH_LPM;
+ ehi->action |= ATA_EH_RESET;
ehi->flags |= ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET;

ap->pflags &= ~ATA_PFLAG_INITIALIZING;
@@ -6093,9 +5976,18 @@ int ata_host_register(struct ata_host *host, struct scsi_host_template *sht)
for (i = 0; i < host->n_ports; i++)
host->ports[i]->print_id = ata_print_id++;

+
+ /* Create associated sysfs transport objects */
+ for (i = 0; i < host->n_ports; i++) {
+ rc = ata_tport_add(host->dev,host->ports[i]);
+ if (rc) {
+ goto err_tadd;
+ }
+ }
+
rc = ata_scsi_add_hosts(host, sht);
if (rc)
- return rc;
+ goto err_tadd;

/* associate with ACPI nodes */
ata_acpi_associate(host);
@@ -6136,6 +6028,13 @@ int ata_host_register(struct ata_host *host, struct scsi_host_template *sht)
}

return 0;
+
+ err_tadd:
+ while (--i >= 0) {
+ ata_tport_delete(host->ports[i]);
+ }
+ return rc;
+
}

/**
@@ -6226,6 +6125,13 @@ static void ata_port_detach(struct ata_port *ap)
cancel_rearming_delayed_work(&ap->hotplug_task);

skip_eh:
+ if (ap->pmp_link) {
+ int i;
+ for (i = 0; i < SATA_PMP_MAX_PORTS; i++)
+ ata_tlink_delete(&ap->pmp_link[i]);
+ }
+ ata_tport_delete(ap);
+
/* remove the associated SCSI host */
scsi_remove_host(ap->scsi_host);
}
@@ -6542,7 +6448,7 @@ static void __init ata_parse_force_param(void)

static int __init ata_init(void)
{
- int rc = -ENOMEM;
+ int rc;

ata_parse_force_param();

@@ -6552,12 +6458,25 @@ static int __init ata_init(void)
return rc;
}

+ libata_transport_init();
+ ata_scsi_transport_template = ata_attach_transport();
+ if (!ata_scsi_transport_template) {
+ ata_sff_exit();
+ rc = -ENOMEM;
+ goto err_out;
+ }
+
printk(KERN_DEBUG "libata version " DRV_VERSION " loaded.\n");
return 0;
+
+err_out:
+ return rc;
}

static void __exit ata_exit(void)
{
+ ata_release_transport(ata_scsi_transport_template);
+ libata_transport_exit();
ata_sff_exit();
kfree(ata_force_tbl);
}
@@ -6573,7 +6492,35 @@ int ata_ratelimit(void)
}

/**
+ * ata_msleep - ATA EH owner aware msleep
+ * @ap: ATA port to attribute the sleep to
+ * @msecs: duration to sleep in milliseconds
+ *
+ * Sleeps @msecs. If the current task is owner of @ap's EH, the
+ * ownership is released before going to sleep and reacquired
+ * after the sleep is complete. IOW, other ports sharing the
+ * @ap->host will be allowed to own the EH while this task is
+ * sleeping.
+ *
+ * LOCKING:
+ * Might sleep.
+ */
+void ata_msleep(struct ata_port *ap, unsigned int msecs)
+{
+ bool owns_eh = ap && ap->host->eh_owner == current;
+
+ if (owns_eh)
+ ata_eh_release(ap);
+
+ msleep(msecs);
+
+ if (owns_eh)
+ ata_eh_acquire(ap);
+}
+
+/**
* ata_wait_register - wait until register value changes
+ * @ap: ATA port to wait register for, can be NULL
* @reg: IO-mapped register
* @mask: Mask to apply to read register value
* @val: Wait condition
@@ -6595,7 +6542,7 @@ int ata_ratelimit(void)
* RETURNS:
* The final register value.
*/
-u32 ata_wait_register(void __iomem *reg, u32 mask, u32 val,
+u32 ata_wait_register(struct ata_port *ap, void __iomem *reg, u32 mask, u32 val,
unsigned long interval, unsigned long timeout)
{
unsigned long deadline;
@@ -6610,7 +6557,7 @@ u32 ata_wait_register(void __iomem *reg, u32 mask, u32 val,
deadline = ata_deadline(jiffies, timeout);

while ((tmp & mask) == val && time_before(jiffies, deadline)) {
- msleep(interval);
+ ata_msleep(ap, interval);
tmp = ioread32(reg);
}

@@ -6686,6 +6633,7 @@ EXPORT_SYMBOL_GPL(sata_set_spd);
EXPORT_SYMBOL_GPL(ata_wait_after_reset);
EXPORT_SYMBOL_GPL(sata_link_debounce);
EXPORT_SYMBOL_GPL(sata_link_resume);
+EXPORT_SYMBOL_GPL(sata_link_scr_lpm);
EXPORT_SYMBOL_GPL(ata_std_prereset);
EXPORT_SYMBOL_GPL(sata_link_hardreset);
EXPORT_SYMBOL_GPL(sata_std_hardreset);
@@ -6693,6 +6641,7 @@ EXPORT_SYMBOL_GPL(ata_std_postreset);
EXPORT_SYMBOL_GPL(ata_dev_classify);
EXPORT_SYMBOL_GPL(ata_dev_pair);
EXPORT_SYMBOL_GPL(ata_ratelimit);
+EXPORT_SYMBOL_GPL(ata_msleep);
EXPORT_SYMBOL_GPL(ata_wait_register);
EXPORT_SYMBOL_GPL(ata_scsi_queuecmd);
EXPORT_SYMBOL_GPL(ata_scsi_slave_config);
diff --git a/drivers/ata/libata-eh.c b/drivers/ata/libata-eh.c
index e48302e..5e59050 100644
--- a/drivers/ata/libata-eh.c
+++ b/drivers/ata/libata-eh.c
@@ -57,6 +57,7 @@ enum {
/* error flags */
ATA_EFLAG_IS_IO = (1 << 0),
ATA_EFLAG_DUBIOUS_XFER = (1 << 1),
+ ATA_EFLAG_OLD_ER = (1 << 31),

/* error categories */
ATA_ECAT_NONE = 0,
@@ -396,14 +397,9 @@ static struct ata_ering_entry *ata_ering_top(struct ata_ering *ering)
return NULL;
}

-static void ata_ering_clear(struct ata_ering *ering)
-{
- memset(ering, 0, sizeof(*ering));
-}
-
-static int ata_ering_map(struct ata_ering *ering,
- int (*map_fn)(struct ata_ering_entry *, void *),
- void *arg)
+int ata_ering_map(struct ata_ering *ering,
+ int (*map_fn)(struct ata_ering_entry *, void *),
+ void *arg)
{
int idx, rc = 0;
struct ata_ering_entry *ent;
@@ -422,6 +418,17 @@ static int ata_ering_map(struct ata_ering *ering,
return rc;
}

+int ata_ering_clear_cb(struct ata_ering_entry *ent, void *void_arg)
+{
+ ent->eflags |= ATA_EFLAG_OLD_ER;
+ return 0;
+}
+
+static void ata_ering_clear(struct ata_ering *ering)
+{
+ ata_ering_map(ering, ata_ering_clear_cb, NULL);
+}
+
static unsigned int ata_eh_dev_action(struct ata_device *dev)
{
struct ata_eh_context *ehc = &dev->link->eh_context;
@@ -456,6 +463,41 @@ static void ata_eh_clear_action(struct ata_link *link, struct ata_device *dev,
}

/**
+ * ata_eh_acquire - acquire EH ownership
+ * @ap: ATA port to acquire EH ownership for
+ *
+ * Acquire EH ownership for @ap. This is the basic exclusion
+ * mechanism for ports sharing a host. Only one port hanging off
+ * the same host can claim the ownership of EH.
+ *
+ * LOCKING:
+ * EH context.
+ */
+void ata_eh_acquire(struct ata_port *ap)
+{
+ mutex_lock(&ap->host->eh_mutex);
+ WARN_ON_ONCE(ap->host->eh_owner);
+ ap->host->eh_owner = current;
+}
+
+/**
+ * ata_eh_release - release EH ownership
+ * @ap: ATA port to release EH ownership for
+ *
+ * Release EH ownership for @ap if the caller. The caller must
+ * have acquired EH ownership using ata_eh_acquire() previously.
+ *
+ * LOCKING:
+ * EH context.
+ */
+void ata_eh_release(struct ata_port *ap)
+{
+ WARN_ON_ONCE(ap->host->eh_owner != current);
+ ap->host->eh_owner = NULL;
+ mutex_unlock(&ap->host->eh_mutex);
+}
+
+/**
* ata_scsi_timed_out - SCSI layer time out callback
* @cmd: timed out SCSI command
*
@@ -572,19 +614,19 @@ void ata_scsi_error(struct Scsi_Host *host)
int nr_timedout = 0;

spin_lock_irqsave(ap->lock, flags);
-
+
/* This must occur under the ap->lock as we don't want
a polled recovery to race the real interrupt handler
-
+
The lost_interrupt handler checks for any completed but
non-notified command and completes much like an IRQ handler.
-
+
We then fall into the error recovery code which will treat
this as if normal completion won the race */

if (ap->ops->lost_interrupt)
ap->ops->lost_interrupt(ap);
-
+
list_for_each_entry_safe(scmd, tmp, &host->eh_cmd_q, eh_entry) {
struct ata_queued_cmd *qc;

@@ -628,15 +670,17 @@ void ata_scsi_error(struct Scsi_Host *host)
ap->eh_tries = ATA_EH_MAX_TRIES;
} else
spin_unlock_wait(ap->lock);
-
+
/* If we timed raced normal completion and there is nothing to
recover nr_timedout == 0 why exactly are we doing error recovery ? */

- repeat:
/* invoke error handler */
if (ap->ops->error_handler) {
struct ata_link *link;

+ /* acquire EH ownership */
+ ata_eh_acquire(ap);
+ repeat:
/* kill fast drain timer */
del_timer_sync(&ap->fastdrain_timer);

@@ -711,6 +755,7 @@ void ata_scsi_error(struct Scsi_Host *host)
host->host_eh_scheduled = 0;

spin_unlock_irqrestore(ap->lock, flags);
+ ata_eh_release(ap);
} else {
WARN_ON(ata_qc_from_tag(ap, ap->link.active_tag) == NULL);
ap->ops->eng_timeout(ap);
@@ -772,7 +817,7 @@ void ata_port_wait_eh(struct ata_port *ap)

/* make sure SCSI EH is complete */
if (scsi_host_in_recovery(ap->scsi_host)) {
- msleep(10);
+ ata_msleep(ap, 10);
goto retry;
}
}
@@ -1573,9 +1618,9 @@ static void ata_eh_analyze_serror(struct ata_link *link)
* host links. For disabled PMP links, only N bit is
* considered as X bit is left at 1 for link plugging.
*/
- hotplug_mask = 0;
-
- if (!(link->flags & ATA_LFLAG_DISABLED) || ata_is_host_link(link))
+ if (link->lpm_policy != ATA_LPM_MAX_POWER)
+ hotplug_mask = 0; /* hotplug doesn't work w/ LPM */
+ else if (!(link->flags & ATA_LFLAG_DISABLED) || ata_is_host_link(link))
hotplug_mask = SERR_PHYRDY_CHG | SERR_DEV_XCHG;
else
hotplug_mask = SERR_PHYRDY_CHG;
@@ -1755,7 +1800,7 @@ static int speed_down_verdict_cb(struct ata_ering_entry *ent, void *void_arg)
struct speed_down_verdict_arg *arg = void_arg;
int cat;

- if (ent->timestamp < arg->since)
+ if ((ent->eflags & ATA_EFLAG_OLD_ER) || (ent->timestamp < arg->since))
return -1;

cat = ata_eh_categorize_error(ent->eflags, ent->err_mask,
@@ -2777,8 +2822,9 @@ int ata_eh_reset(struct ata_link *link, int classify,
ata_eh_done(link, NULL, ATA_EH_RESET);
if (slave)
ata_eh_done(slave, NULL, ATA_EH_RESET);
- ehc->last_reset = jiffies; /* update to completion time */
+ ehc->last_reset = jiffies; /* update to completion time */
ehc->i.action |= ATA_EH_REVALIDATE;
+ link->lpm_policy = ATA_LPM_UNKNOWN; /* reset LPM state */

rc = 0;
out:
@@ -2810,8 +2856,10 @@ int ata_eh_reset(struct ata_link *link, int classify,
"reset failed (errno=%d), retrying in %u secs\n",
rc, DIV_ROUND_UP(jiffies_to_msecs(delta), 1000));

+ ata_eh_release(ap);
while (delta)
delta = schedule_timeout_uninterruptible(delta);
+ ata_eh_acquire(ap);
}

if (try == max_tries - 1) {
@@ -3204,6 +3252,124 @@ static int ata_eh_maybe_retry_flush(struct ata_device *dev)
return rc;
}

+/**
+ * ata_eh_set_lpm - configure SATA interface power management
+ * @link: link to configure power management
+ * @policy: the link power management policy
+ * @r_failed_dev: out parameter for failed device
+ *
+ * Enable SATA Interface power management. This will enable
+ * Device Interface Power Management (DIPM) for min_power
+ * policy, and then call driver specific callbacks for
+ * enabling Host Initiated Power management.
+ *
+ * LOCKING:
+ * EH context.
+ *
+ * RETURNS:
+ * 0 on success, -errno on failure.
+ */
+static int ata_eh_set_lpm(struct ata_link *link, enum ata_lpm_policy policy,
+ struct ata_device **r_failed_dev)
+{
+ struct ata_port *ap = ata_is_host_link(link) ? link->ap : NULL;
+ struct ata_eh_context *ehc = &link->eh_context;
+ struct ata_device *dev, *link_dev = NULL, *lpm_dev = NULL;
+ unsigned int hints = ATA_LPM_EMPTY | ATA_LPM_HIPM;
+ unsigned int err_mask;
+ int rc;
+
+ /* if the link or host doesn't do LPM, noop */
+ if ((link->flags & ATA_LFLAG_NO_LPM) || (ap && !ap->ops->set_lpm))
+ return 0;
+
+ /*
+ * DIPM is enabled only for MIN_POWER as some devices
+ * misbehave when the host NACKs transition to SLUMBER. Order
+ * device and link configurations such that the host always
+ * allows DIPM requests.
+ */
+ ata_for_each_dev(dev, link, ENABLED) {
+ bool hipm = ata_id_has_hipm(dev->id);
+ bool dipm = ata_id_has_dipm(dev->id);
+
+ /* find the first enabled and LPM enabled devices */
+ if (!link_dev)
+ link_dev = dev;
+
+ if (!lpm_dev && (hipm || dipm))
+ lpm_dev = dev;
+
+ hints &= ~ATA_LPM_EMPTY;
+ if (!hipm)
+ hints &= ~ATA_LPM_HIPM;
+
+ /* disable DIPM before changing link config */
+ if (policy != ATA_LPM_MIN_POWER && dipm) {
+ err_mask = ata_dev_set_feature(dev,
+ SETFEATURES_SATA_DISABLE, SATA_DIPM);
+ if (err_mask && err_mask != AC_ERR_DEV) {
+ ata_dev_printk(dev, KERN_WARNING,
+ "failed to disable DIPM, Emask 0x%x\n",
+ err_mask);
+ rc = -EIO;
+ goto fail;
+ }
+ }
+ }
+
+ if (ap) {
+ rc = ap->ops->set_lpm(link, policy, hints);
+ if (!rc && ap->slave_link)
+ rc = ap->ops->set_lpm(ap->slave_link, policy, hints);
+ } else
+ rc = sata_pmp_set_lpm(link, policy, hints);
+
+ /*
+ * Attribute link config failure to the first (LPM) enabled
+ * device on the link.
+ */
+ if (rc) {
+ if (rc == -EOPNOTSUPP) {
+ link->flags |= ATA_LFLAG_NO_LPM;
+ return 0;
+ }
+ dev = lpm_dev ? lpm_dev : link_dev;
+ goto fail;
+ }
+
+ /* host config updated, enable DIPM if transitioning to MIN_POWER */
+ ata_for_each_dev(dev, link, ENABLED) {
+ if (policy == ATA_LPM_MIN_POWER && ata_id_has_dipm(dev->id)) {
+ err_mask = ata_dev_set_feature(dev,
+ SETFEATURES_SATA_ENABLE, SATA_DIPM);
+ if (err_mask && err_mask != AC_ERR_DEV) {
+ ata_dev_printk(dev, KERN_WARNING,
+ "failed to enable DIPM, Emask 0x%x\n",
+ err_mask);
+ rc = -EIO;
+ goto fail;
+ }
+ }
+ }
+
+ link->lpm_policy = policy;
+ if (ap && ap->slave_link)
+ ap->slave_link->lpm_policy = policy;
+ return 0;
+
+fail:
+ /* if no device or only one more chance is left, disable LPM */
+ if (!dev || ehc->tries[dev->devno] <= 2) {
+ ata_link_printk(link, KERN_WARNING,
+ "disabling LPM on the link\n");
+ link->flags |= ATA_LFLAG_NO_LPM;
+ }
+ if (r_failed_dev)
+ *r_failed_dev = dev;
+ return rc;
+}
+
static int ata_link_nr_enabled(struct ata_link *link)
{
struct ata_device *dev;
@@ -3288,6 +3454,16 @@ static int ata_eh_schedule_probe(struct ata_device *dev)
ehc->saved_xfer_mode[dev->devno] = 0;
ehc->saved_ncq_enabled &= ~(1 << dev->devno);

+ /* the link maybe in a deep sleep, wake it up */
+ if (link->lpm_policy > ATA_LPM_MAX_POWER) {
+ if (ata_is_host_link(link))
+ link->ap->ops->set_lpm(link, ATA_LPM_MAX_POWER,
+ ATA_LPM_EMPTY);
+ else
+ sata_pmp_set_lpm(link, ATA_LPM_MAX_POWER,
+ ATA_LPM_EMPTY);
+ }
+
/* Record and count probe trials on the ering. The specific
* error mask used is irrelevant. Because a successful device
* detection clears the ering, this count accumulates only if
@@ -3389,8 +3565,7 @@ int ata_eh_recover(struct ata_port *ap, ata_prereset_fn_t prereset,
{
struct ata_link *link;
struct ata_device *dev;
- int nr_failed_devs;
- int rc;
+ int rc, nr_fails;
unsigned long flags, deadline;

DPRINTK("ENTER\n");
@@ -3431,7 +3606,6 @@ int ata_eh_recover(struct ata_port *ap, ata_prereset_fn_t prereset,

retry:
rc = 0;
- nr_failed_devs = 0;

/* if UNLOADING, finish immediately */
if (ap->pflags & ATA_PFLAG_UNLOADING)
@@ -3501,8 +3675,10 @@ int ata_eh_recover(struct ata_port *ap, ata_prereset_fn_t prereset,
if (time_before_eq(deadline, now))
break;

+ ata_eh_release(ap);
deadline = wait_for_completion_timeout(&ap->park_req_pending,
deadline - now);
+ ata_eh_acquire(ap);
} while (deadline);
ata_for_each_link(link, ap, EDGE) {
ata_for_each_dev(dev, link, ALL) {
@@ -3516,13 +3692,17 @@ int ata_eh_recover(struct ata_port *ap, ata_prereset_fn_t prereset,
}

/* the rest */
- ata_for_each_link(link, ap, EDGE) {
+ nr_fails = 0;
+ ata_for_each_link(link, ap, PMP_FIRST) {
struct ata_eh_context *ehc = &link->eh_context;

+ if (sata_pmp_attached(ap) && ata_is_host_link(link))
+ goto config_lpm;
+
/* revalidate existing devices and attach new ones */
rc = ata_eh_revalidate_and_attach(link, &dev);
if (rc)
- goto dev_fail;
+ goto rest_fail;

/* if PMP got attached, return, pmp EH will take care of it */
if (link->device->class == ATA_DEV_PMP) {
@@ -3534,7 +3714,7 @@ int ata_eh_recover(struct ata_port *ap, ata_prereset_fn_t prereset,
if (ehc->i.flags & ATA_EHI_SETMODE) {
rc = ata_set_mode(link, &dev);
if (rc)
- goto dev_fail;
+ goto rest_fail;
ehc->i.flags &= ~ATA_EHI_SETMODE;
}

@@ -3547,7 +3727,7 @@ int ata_eh_recover(struct ata_port *ap, ata_prereset_fn_t prereset,
continue;
rc = atapi_eh_clear_ua(dev);
if (rc)
- goto dev_fail;
+ goto rest_fail;
}
}

@@ -3557,21 +3737,25 @@ int ata_eh_recover(struct ata_port *ap, ata_prereset_fn_t prereset,
continue;
rc = ata_eh_maybe_retry_flush(dev);
if (rc)
- goto dev_fail;
+ goto rest_fail;
}

+ config_lpm:
/* configure link power saving */
- if (ehc->i.action & ATA_EH_LPM)
- ata_for_each_dev(dev, link, ALL)
- ata_dev_enable_pm(dev, ap->pm_policy);
+ if (link->lpm_policy != ap->target_lpm_policy) {
+ rc = ata_eh_set_lpm(link, ap->target_lpm_policy, &dev);
+ if (rc)
+ goto rest_fail;
+ }

/* this link is okay now */
ehc->i.flags = 0;
continue;

-dev_fail:
- nr_failed_devs++;
- ata_eh_handle_dev_fail(dev, rc);
+ rest_fail:
+ nr_fails++;
+ if (dev)
+ ata_eh_handle_dev_fail(dev, rc);

if (ap->pflags & ATA_PFLAG_FROZEN) {
/* PMP reset requires working host port.
@@ -3583,7 +3767,7 @@ dev_fail:
}
}

- if (nr_failed_devs)
+ if (nr_fails)
goto retry;

out:
diff --git a/drivers/ata/libata-pmp.c b/drivers/ata/libata-pmp.c
index 224faab..3120596 100644
--- a/drivers/ata/libata-pmp.c
+++ b/drivers/ata/libata-pmp.c
@@ -11,6 +11,7 @@
#include <linux/libata.h>
#include <linux/slab.h>
#include "libata.h"
+#include "libata-transport.h"

const struct ata_port_operations sata_pmp_port_ops = {
.inherits = &sata_port_ops,
@@ -185,6 +186,27 @@ int sata_pmp_scr_write(struct ata_link *link, int reg, u32 val)
}

/**
+ * sata_pmp_set_lpm - configure LPM for a PMP link
+ * @link: PMP link to configure LPM for
+ * @policy: target LPM policy
+ * @hints: LPM hints
+ *
+ * Configure LPM for @link. This function will contain any PMP
+ * specific workarounds if necessary.
+ *
+ * LOCKING:
+ * EH context.
+ *
+ * RETURNS:
+ * 0 on success, -errno on failure.
+ */
+int sata_pmp_set_lpm(struct ata_link *link, enum ata_lpm_policy policy,
+ unsigned hints)
+{
+ return sata_link_scr_lpm(link, policy, true);
+}
+
+/**
* sata_pmp_read_gscr - read GSCR block of SATA PMP
* @dev: PMP device
* @gscr: buffer to read GSCR block into
@@ -312,10 +334,10 @@ static int sata_pmp_configure(struct ata_device *dev, int print_info)
return rc;
}

-static int sata_pmp_init_links(struct ata_port *ap, int nr_ports)
+static int sata_pmp_init_links (struct ata_port *ap, int nr_ports)
{
struct ata_link *pmp_link = ap->pmp_link;
- int i;
+ int i, err;

if (!pmp_link) {
pmp_link = kzalloc(sizeof(pmp_link[0]) * SATA_PMP_MAX_PORTS,
@@ -327,6 +349,13 @@ static int sata_pmp_init_links(struct ata_port *ap, int nr_ports)
ata_link_init(ap, &pmp_link[i], i);

ap->pmp_link = pmp_link;
+
+ for (i = 0; i < SATA_PMP_MAX_PORTS; i++) {
+ err = ata_tlink_add(&pmp_link[i]);
+ if (err) {
+ goto err_tlink;
+ }
+ }
}

for (i = 0; i < nr_ports; i++) {
@@ -339,6 +368,12 @@ static int sata_pmp_init_links(struct ata_port *ap, int nr_ports)
}

return 0;
+ err_tlink:
+ while (--i >= 0)
+ ata_tlink_delete(&pmp_link[i]);
+ kfree(pmp_link);
+ ap->pmp_link = NULL;
+ return err;
}

static void sata_pmp_quirks(struct ata_port *ap)
@@ -351,6 +386,9 @@ static void sata_pmp_quirks(struct ata_port *ap)
if (vendor == 0x1095 && devid == 0x3726) {
/* sil3726 quirks */
ata_for_each_link(link, ap, EDGE) {
+ /* link reports offline after LPM */
+ link->flags |= ATA_LFLAG_NO_LPM;
+
/* Class code report is unreliable and SRST
* times out under certain configurations.
*/
@@ -366,6 +404,9 @@ static void sata_pmp_quirks(struct ata_port *ap)
} else if (vendor == 0x1095 && devid == 0x4723) {
/* sil4723 quirks */
ata_for_each_link(link, ap, EDGE) {
+ /* link reports offline after LPM */
+ link->flags |= ATA_LFLAG_NO_LPM;
+
/* class code report is unreliable */
if (link->pmp < 2)
link->flags |= ATA_LFLAG_ASSUME_ATA;
@@ -378,6 +419,9 @@ static void sata_pmp_quirks(struct ata_port *ap)
} else if (vendor == 0x1095 && devid == 0x4726) {
/* sil4726 quirks */
ata_for_each_link(link, ap, EDGE) {
+ /* link reports offline after LPM */
+ link->flags |= ATA_LFLAG_NO_LPM;
+
/* Class code report is unreliable and SRST
* times out under certain configurations.
* Config device can be at port 0 or 5 and
@@ -938,15 +982,25 @@ static int sata_pmp_eh_recover(struct ata_port *ap)
if (rc)
goto link_fail;

- /* Connection status might have changed while resetting other
- * links, check SATA_PMP_GSCR_ERROR before returning.
- */
-
/* clear SNotification */
rc = sata_scr_read(&ap->link, SCR_NOTIFICATION, &sntf);
if (rc == 0)
sata_scr_write(&ap->link, SCR_NOTIFICATION, sntf);

+ /*
+ * If LPM is active on any fan-out port, hotplug wouldn't
+ * work. Return w/ PHY event notification disabled.
+ */
+ ata_for_each_link(link, ap, EDGE)
+ if (link->lpm_policy > ATA_LPM_MAX_POWER)
+ return 0;
+
+ /*
+ * Connection status might have changed while resetting other
+ * links, enable notification and check SATA_PMP_GSCR_ERROR
+ * before returning.
+ */
+
/* enable notification */
if (pmp_dev->flags & ATA_DFLAG_AN) {
gscr[SATA_PMP_GSCR_FEAT_EN] |= SATA_PMP_FEAT_NOTIFY;
diff --git a/drivers/ata/libata-scsi.c b/drivers/ata/libata-scsi.c
index a89172c..d050e07 100644
--- a/drivers/ata/libata-scsi.c
+++ b/drivers/ata/libata-scsi.c
@@ -51,8 +51,8 @@
#include <asm/unaligned.h>

#include "libata.h"
+#include "libata-transport.h"

-#define SECTOR_SIZE 512
#define ATA_SCSI_RBUF_SIZE 4096

static DEFINE_SPINLOCK(ata_scsi_rbuf_lock);
@@ -64,9 +64,6 @@ static struct ata_device *__ata_scsi_find_dev(struct ata_port *ap,
const struct scsi_device *scsidev);
static struct ata_device *ata_scsi_find_dev(struct ata_port *ap,
const struct scsi_device *scsidev);
-static int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel,
- unsigned int id, unsigned int lun);
-

#define RW_RECOVERY_MPAGE 0x1
#define RW_RECOVERY_MPAGE_LEN 12
@@ -106,83 +103,55 @@ static const u8 def_control_mpage[CONTROL_MPAGE_LEN] = {
0, 30 /* extended self test time, see 05-359r1 */
};

-/*
- * libata transport template. libata doesn't do real transport stuff.
- * It just needs the eh_timed_out hook.
- */
-static struct scsi_transport_template ata_scsi_transport_template = {
- .eh_strategy_handler = ata_scsi_error,
- .eh_timed_out = ata_scsi_timed_out,
- .user_scan = ata_scsi_user_scan,
-};
-
-
-static const struct {
- enum link_pm value;
- const char *name;
-} link_pm_policy[] = {
- { NOT_AVAILABLE, "max_performance" },
- { MIN_POWER, "min_power" },
- { MAX_PERFORMANCE, "max_performance" },
- { MEDIUM_POWER, "medium_power" },
+static const char *ata_lpm_policy_names[] = {
+ [ATA_LPM_UNKNOWN] = "max_performance",
+ [ATA_LPM_MAX_POWER] = "max_performance",
+ [ATA_LPM_MED_POWER] = "medium_power",
+ [ATA_LPM_MIN_POWER] = "min_power",
};

-static const char *ata_scsi_lpm_get(enum link_pm policy)
-{
- int i;
-
- for (i = 0; i < ARRAY_SIZE(link_pm_policy); i++)
- if (link_pm_policy[i].value == policy)
- return link_pm_policy[i].name;
-
- return NULL;
-}
-
-static ssize_t ata_scsi_lpm_put(struct device *dev,
- struct device_attribute *attr,
- const char *buf, size_t count)
+static ssize_t ata_scsi_lpm_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
{
struct Scsi_Host *shost = class_to_shost(dev);
struct ata_port *ap = ata_shost_to_port(shost);
- enum link_pm policy = 0;
- int i;
+ enum ata_lpm_policy policy;
+ unsigned long flags;

- /*
- * we are skipping array location 0 on purpose - this
- * is because a value of NOT_AVAILABLE is displayed
- * to the user as max_performance, but when the user
- * writes "max_performance", they actually want the
- * value to match MAX_PERFORMANCE.
- */
- for (i = 1; i < ARRAY_SIZE(link_pm_policy); i++) {
- const int len = strlen(link_pm_policy[i].name);
- if (strncmp(link_pm_policy[i].name, buf, len) == 0) {
- policy = link_pm_policy[i].value;
+ /* UNKNOWN is internal state, iterate from MAX_POWER */
+ for (policy = ATA_LPM_MAX_POWER;
+ policy < ARRAY_SIZE(ata_lpm_policy_names); policy++) {
+ const char *name = ata_lpm_policy_names[policy];
+
+ if (strncmp(name, buf, strlen(name)) == 0)
break;
- }
}
- if (!policy)
+ if (policy == ARRAY_SIZE(ata_lpm_policy_names))
return -EINVAL;

- ata_lpm_schedule(ap, policy);
+ spin_lock_irqsave(ap->lock, flags);
+ ap->target_lpm_policy = policy;
+ ata_port_schedule_eh(ap);
+ spin_unlock_irqrestore(ap->lock, flags);
+
return count;
}

-static ssize_t
-ata_scsi_lpm_show(struct device *dev, struct device_attribute *attr, char *buf)
+static ssize_t ata_scsi_lpm_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
{
struct Scsi_Host *shost = class_to_shost(dev);
struct ata_port *ap = ata_shost_to_port(shost);
- const char *policy =
- ata_scsi_lpm_get(ap->pm_policy);

- if (!policy)
+ if (ap->target_lpm_policy >= ARRAY_SIZE(ata_lpm_policy_names))
return -EINVAL;

- return snprintf(buf, 23, "%s\n", policy);
+ return snprintf(buf, PAGE_SIZE, "%s\n",
+ ata_lpm_policy_names[ap->target_lpm_policy]);
}
DEVICE_ATTR(link_power_management_policy, S_IRUGO | S_IWUSR,
- ata_scsi_lpm_show, ata_scsi_lpm_put);
+ ata_scsi_lpm_show, ata_scsi_lpm_store);
EXPORT_SYMBOL_GPL(dev_attr_link_power_management_policy);

static ssize_t ata_scsi_park_show(struct device *device,
@@ -516,7 +485,7 @@ int ata_cmd_ioctl(struct scsi_device *scsidev, void __user *arg)
memset(scsi_cmd, 0, sizeof(scsi_cmd));

if (args[3]) {
- argsize = SECTOR_SIZE * args[3];
+ argsize = ATA_SECT_SIZE * args[3];
argbuf = kmalloc(argsize, GFP_KERNEL);
if (argbuf == NULL) {
rc = -ENOMEM;
@@ -1150,8 +1119,9 @@ static int ata_scsi_dev_config(struct scsi_device *sdev,
blk_queue_dma_drain(q, atapi_drain_needed, buf, ATAPI_MAX_DRAIN);
} else {
/* ATA devices must be sector aligned */
+ sdev->sector_size = ata_id_logical_sector_size(dev->id);
blk_queue_update_dma_alignment(sdev->request_queue,
- ATA_SECT_SIZE - 1);
+ sdev->sector_size - 1);
sdev->manage_start_stop = 1;
}

@@ -1166,6 +1136,7 @@ static int ata_scsi_dev_config(struct scsi_device *sdev,
scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, depth);
}

+ dev->sdev = sdev;
return 0;
}

@@ -1696,7 +1667,7 @@ static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc)
goto nothing_to_do;

qc->flags |= ATA_QCFLAG_IO;
- qc->nbytes = n_block * ATA_SECT_SIZE;
+ qc->nbytes = n_block * scmd->device->sector_size;

rc = ata_build_rw_tf(&qc->tf, qc->dev, block, n_block, tf_flags,
qc->tag);
@@ -2001,6 +1972,7 @@ static unsigned int ata_scsiop_inq_00(struct ata_scsi_args *args, u8 *rbuf)
0x89, /* page 0x89, ata info page */
0xb0, /* page 0xb0, block limits page */
0xb1, /* page 0xb1, block device characteristics page */
+ 0xb2, /* page 0xb2, thin provisioning page */
};

rbuf[3] = sizeof(pages); /* number of supported VPD pages */
@@ -2123,7 +2095,7 @@ static unsigned int ata_scsiop_inq_89(struct ata_scsi_args *args, u8 *rbuf)

static unsigned int ata_scsiop_inq_b0(struct ata_scsi_args *args, u8 *rbuf)
{
- u32 min_io_sectors;
+ u16 min_io_sectors;

rbuf[1] = 0xb0;
rbuf[3] = 0x3c; /* required VPD size with unmap support */
@@ -2135,10 +2107,7 @@ static unsigned int ata_scsiop_inq_b0(struct ata_scsi_args *args, u8 *rbuf)
* logical than physical sector size we need to figure out what the
* latter is.
*/
- if (ata_id_has_large_logical_sectors(args->id))
- min_io_sectors = ata_id_logical_per_physical_sectors(args->id);
- else
- min_io_sectors = 1;
+ min_io_sectors = 1 << ata_id_log2_per_physical_sector(args->id);
put_unaligned_be16(min_io_sectors, &rbuf[6]);

/*
@@ -2172,6 +2141,16 @@ static unsigned int ata_scsiop_inq_b1(struct ata_scsi_args *args, u8 *rbuf)
return 0;
}

+static unsigned int ata_scsiop_inq_b2(struct ata_scsi_args *args, u8 *rbuf)
+{
+ /* SCSI Thin Provisioning VPD page: SBC-3 rev 22 or later */
+ rbuf[1] = 0xb2;
+ rbuf[3] = 0x4;
+ rbuf[5] = 1 << 6; /* TPWS */
+
+ return 0;
+}
+
/**
* ata_scsiop_noop - Command handler that simply returns success.
* @args: device IDENTIFY data / SCSI command of interest.
@@ -2397,21 +2376,13 @@ static unsigned int ata_scsiop_read_cap(struct ata_scsi_args *args, u8 *rbuf)
{
struct ata_device *dev = args->dev;
u64 last_lba = dev->n_sectors - 1; /* LBA of the last block */
- u8 log_per_phys = 0;
- u16 lowest_aligned = 0;
- u16 word_106 = dev->id[106];
- u16 word_209 = dev->id[209];
-
- if ((word_106 & 0xc000) == 0x4000) {
- /* Number and offset of logical sectors per physical sector */
- if (word_106 & (1 << 13))
- log_per_phys = word_106 & 0xf;
- if ((word_209 & 0xc000) == 0x4000) {
- u16 first = dev->id[209] & 0x3fff;
- if (first > 0)
- lowest_aligned = (1 << log_per_phys) - first;
- }
- }
+ u32 sector_size; /* physical sector size in bytes */
+ u8 log2_per_phys;
+ u16 lowest_aligned;
+
+ sector_size = ata_id_logical_sector_size(dev->id);
+ log2_per_phys = ata_id_log2_per_physical_sector(dev->id);
+ lowest_aligned = ata_id_logical_sector_offset(dev->id, log2_per_phys);

VPRINTK("ENTER\n");

@@ -2426,8 +2397,10 @@ static unsigned int ata_scsiop_read_cap(struct ata_scsi_args *args, u8 *rbuf)
rbuf[3] = last_lba;

/* sector size */
- rbuf[6] = ATA_SECT_SIZE >> 8;
- rbuf[7] = ATA_SECT_SIZE & 0xff;
+ rbuf[4] = sector_size >> (8 * 3);
+ rbuf[5] = sector_size >> (8 * 2);
+ rbuf[6] = sector_size >> (8 * 1);
+ rbuf[7] = sector_size;
} else {
/* sector count, 64-bit */
rbuf[0] = last_lba >> (8 * 7);
@@ -2440,11 +2413,13 @@ static unsigned int ata_scsiop_read_cap(struct ata_scsi_args *args, u8 *rbuf)
rbuf[7] = last_lba;

/* sector size */
- rbuf[10] = ATA_SECT_SIZE >> 8;
- rbuf[11] = ATA_SECT_SIZE & 0xff;
+ rbuf[ 8] = sector_size >> (8 * 3);
+ rbuf[ 9] = sector_size >> (8 * 2);
+ rbuf[10] = sector_size >> (8 * 1);
+ rbuf[11] = sector_size;

rbuf[12] = 0;
- rbuf[13] = log_per_phys;
+ rbuf[13] = log2_per_phys;
rbuf[14] = (lowest_aligned >> 8) & 0x3f;
rbuf[15] = lowest_aligned;

@@ -2888,9 +2863,8 @@ static unsigned int ata_scsi_pass_thru(struct ata_queued_cmd *qc)
tf->device = dev->devno ?
tf->device | ATA_DEV1 : tf->device & ~ATA_DEV1;

- /* READ/WRITE LONG use a non-standard sect_size */
- qc->sect_size = ATA_SECT_SIZE;
switch (tf->command) {
+ /* READ/WRITE LONG use a non-standard sect_size */
case ATA_CMD_READ_LONG:
case ATA_CMD_READ_LONG_ONCE:
case ATA_CMD_WRITE_LONG:
@@ -2898,6 +2872,45 @@ static unsigned int ata_scsi_pass_thru(struct ata_queued_cmd *qc)
if (tf->protocol != ATA_PROT_PIO || tf->nsect != 1)
goto invalid_fld;
qc->sect_size = scsi_bufflen(scmd);
+ break;
+
+ /* commands using reported Logical Block size (e.g. 512 or 4K) */
+ case ATA_CMD_CFA_WRITE_NE:
+ case ATA_CMD_CFA_TRANS_SECT:
+ case ATA_CMD_CFA_WRITE_MULT_NE:
+ /* XXX: case ATA_CMD_CFA_WRITE_SECTORS_WITHOUT_ERASE: */
+ case ATA_CMD_READ:
+ case ATA_CMD_READ_EXT:
+ case ATA_CMD_READ_QUEUED:
+ /* XXX: case ATA_CMD_READ_QUEUED_EXT: */
+ case ATA_CMD_FPDMA_READ:
+ case ATA_CMD_READ_MULTI:
+ case ATA_CMD_READ_MULTI_EXT:
+ case ATA_CMD_PIO_READ:
+ case ATA_CMD_PIO_READ_EXT:
+ case ATA_CMD_READ_STREAM_DMA_EXT:
+ case ATA_CMD_READ_STREAM_EXT:
+ case ATA_CMD_VERIFY:
+ case ATA_CMD_VERIFY_EXT:
+ case ATA_CMD_WRITE:
+ case ATA_CMD_WRITE_EXT:
+ case ATA_CMD_WRITE_FUA_EXT:
+ case ATA_CMD_WRITE_QUEUED:
+ case ATA_CMD_WRITE_QUEUED_FUA_EXT:
+ case ATA_CMD_FPDMA_WRITE:
+ case ATA_CMD_WRITE_MULTI:
+ case ATA_CMD_WRITE_MULTI_EXT:
+ case ATA_CMD_WRITE_MULTI_FUA_EXT:
+ case ATA_CMD_PIO_WRITE:
+ case ATA_CMD_PIO_WRITE_EXT:
+ case ATA_CMD_WRITE_STREAM_DMA_EXT:
+ case ATA_CMD_WRITE_STREAM_EXT:
+ qc->sect_size = scmd->device->sector_size;
+ break;
+
+ /* Everything else uses 512 byte "sectors" */
+ default:
+ qc->sect_size = ATA_SECT_SIZE;
}

/*
@@ -3250,6 +3263,9 @@ void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd,
case 0xb1:
ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b1);
break;
+ case 0xb2:
+ ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b2);
+ break;
default:
ata_scsi_invalid_field(cmd, done);
break;
@@ -3334,7 +3350,7 @@ int ata_scsi_add_hosts(struct ata_host *host, struct scsi_host_template *sht)
*(struct ata_port **)&shost->hostdata[0] = ap;
ap->scsi_host = shost;

- shost->transportt = &ata_scsi_transport_template;
+ shost->transportt = ata_scsi_transport_template;
shost->unique_id = ap->print_id;
shost->max_id = 16;
shost->max_lun = 1;
@@ -3393,6 +3409,8 @@ void ata_scsi_scan_host(struct ata_port *ap, int sync)
if (!IS_ERR(sdev)) {
dev->sdev = sdev;
scsi_device_put(sdev);
+ } else {
+ dev->sdev = NULL;
}
}
}
@@ -3616,8 +3634,8 @@ void ata_scsi_hotplug(struct work_struct *work)
* RETURNS:
* Zero.
*/
-static int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel,
- unsigned int id, unsigned int lun)
+int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel,
+ unsigned int id, unsigned int lun)
{
struct ata_port *ap = ata_shost_to_port(shost);
unsigned long flags;
diff --git a/drivers/ata/libata-sff.c b/drivers/ata/libata-sff.c
index e30c537..14d18bf 100644
--- a/drivers/ata/libata-sff.c
+++ b/drivers/ata/libata-sff.c
@@ -222,7 +222,7 @@ int ata_sff_busy_sleep(struct ata_port *ap,
timeout = ata_deadline(timer_start, tmout_pat);
while (status != 0xff && (status & ATA_BUSY) &&
time_before(jiffies, timeout)) {
- msleep(50);
+ ata_msleep(ap, 50);
status = ata_sff_busy_wait(ap, ATA_BUSY, 3);
}

@@ -234,7 +234,7 @@ int ata_sff_busy_sleep(struct ata_port *ap,
timeout = ata_deadline(timer_start, tmout);
while (status != 0xff && (status & ATA_BUSY) &&
time_before(jiffies, timeout)) {
- msleep(50);
+ ata_msleep(ap, 50);
status = ap->ops->sff_check_status(ap);
}

@@ -360,7 +360,7 @@ static void ata_dev_select(struct ata_port *ap, unsigned int device,

if (wait) {
if (can_sleep && ap->link.device[device].class == ATA_DEV_ATAPI)
- msleep(150);
+ ata_msleep(ap, 150);
ata_wait_idle(ap);
}
}
@@ -1356,7 +1356,7 @@ fsm_start:
*/
status = ata_sff_busy_wait(ap, ATA_BUSY, 5);
if (status & ATA_BUSY) {
- msleep(2);
+ ata_msleep(ap, 2);
status = ata_sff_busy_wait(ap, ATA_BUSY, 10);
if (status & ATA_BUSY) {
ata_sff_queue_pio_task(link, ATA_SHORT_PAUSE);
@@ -1937,7 +1937,7 @@ int ata_sff_wait_after_reset(struct ata_link *link, unsigned int devmask,
unsigned int dev1 = devmask & (1 << 1);
int rc, ret = 0;

- msleep(ATA_WAIT_AFTER_RESET);
+ ata_msleep(ap, ATA_WAIT_AFTER_RESET);

/* always check readiness of the master device */
rc = ata_sff_wait_ready(link, deadline);
@@ -1966,7 +1966,7 @@ int ata_sff_wait_after_reset(struct ata_link *link, unsigned int devmask,
lbal = ioread8(ioaddr->lbal_addr);
if ((nsect == 1) && (lbal == 1))
break;
- msleep(50); /* give drive a breather */
+ ata_msleep(ap, 50); /* give drive a breather */
}

rc = ata_sff_wait_ready(link, deadline);
@@ -3342,7 +3342,7 @@ int __init ata_sff_init(void)
return 0;
}

-void __exit ata_sff_exit(void)
+void ata_sff_exit(void)
{
destroy_workqueue(ata_sff_wq);
}
diff --git a/drivers/ata/libata-transport.c b/drivers/ata/libata-transport.c
new file mode 100644
index 0000000..ce9dc62
--- /dev/null
+++ b/drivers/ata/libata-transport.c
@@ -0,0 +1,774 @@
+/*
+ * Copyright 2008 ioogle, Inc. All rights reserved.
+ * Released under GPL v2.
+ *
+ * Libata transport class.
+ *
+ * The ATA transport class contains common code to deal with ATA HBAs,
+ * an approximated representation of ATA topologies in the driver model,
+ * and various sysfs attributes to expose these topologies and management
+ * interfaces to user-space.
+ *
+ * There are 3 objects defined in in this class:
+ * - ata_port
+ * - ata_link
+ * - ata_device
+ * Each port has a link object. Each link can have up to two devices for PATA
+ * and generally one for SATA.
+ * If there is SATA port multiplier [PMP], 15 additional ata_link object are
+ * created.
+ *
+ * These objects are created when the ata host is initialized and when a PMP is
+ * found. They are removed only when the HBA is removed, cleaned before the
+ * error handler runs.
+ */
+
+
+#include <linux/kernel.h>
+#include <linux/blkdev.h>
+#include <linux/spinlock.h>
+#include <linux/slab.h>
+#include <scsi/scsi_transport.h>
+#include <linux/libata.h>
+#include <linux/hdreg.h>
+#include <linux/uaccess.h>
+
+#include "libata.h"
+#include "libata-transport.h"
+
+#define ATA_PORT_ATTRS 2
+#define ATA_LINK_ATTRS 3
+#define ATA_DEV_ATTRS 9
+
+struct scsi_transport_template;
+struct scsi_transport_template *ata_scsi_transport_template;
+
+struct ata_internal {
+ struct scsi_transport_template t;
+
+ 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];
+
+ struct transport_container link_attr_cont;
+ struct transport_container dev_attr_cont;
+
+ /*
+ * 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];
+ struct device_attribute *dev_attrs[ATA_DEV_ATTRS + 1];
+};
+#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);
+}
diff --git a/drivers/ata/libata-transport.h b/drivers/ata/libata-transport.h
new file mode 100644
index 0000000..2820cf8
--- /dev/null
+++ b/drivers/ata/libata-transport.h
@@ -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
diff --git a/drivers/ata/libata.h b/drivers/ata/libata.h
index 9ce1ecc..a9be110 100644
--- a/drivers/ata/libata.h
+++ b/drivers/ata/libata.h
@@ -86,6 +86,8 @@ extern int ata_dev_revalidate(struct ata_device *dev, unsigned int new_class,
extern int ata_dev_configure(struct ata_device *dev);
extern int sata_down_spd_limit(struct ata_link *link, u32 spd_limit);
extern int ata_down_xfermask_limit(struct ata_device *dev, unsigned int sel);
+extern unsigned int ata_dev_set_feature(struct ata_device *dev,
+ u8 enable, u8 feature);
extern void ata_sg_clean(struct ata_queued_cmd *qc);
extern void ata_qc_free(struct ata_queued_cmd *qc);
extern void ata_qc_issue(struct ata_queued_cmd *qc);
@@ -100,8 +102,7 @@ extern int sata_link_init_spd(struct ata_link *link);
extern int ata_task_ioctl(struct scsi_device *scsidev, void __user *arg);
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
@@ -137,10 +138,15 @@ 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);
extern void ata_internal_cmd_timed_out(struct ata_device *dev, u8 cmd);
+extern void ata_eh_acquire(struct ata_port *ap);
+extern void ata_eh_release(struct ata_port *ap);
extern enum blk_eh_timer_return ata_scsi_timed_out(struct scsi_cmnd *cmd);
extern void ata_scsi_error(struct Scsi_Host *host);
extern void ata_port_wait_eh(struct ata_port *ap);
@@ -164,11 +170,16 @@ 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
extern int sata_pmp_scr_read(struct ata_link *link, int reg, u32 *val);
extern int sata_pmp_scr_write(struct ata_link *link, int reg, u32 val);
+extern int sata_pmp_set_lpm(struct ata_link *link, enum ata_lpm_policy policy,
+ unsigned hints);
extern int sata_pmp_attach(struct ata_device *dev);
#else /* CONFIG_SATA_PMP */
static inline int sata_pmp_scr_read(struct ata_link *link, int reg, u32 *val)
@@ -181,6 +192,12 @@ static inline int sata_pmp_scr_write(struct ata_link *link, int reg, u32 val)
return -EINVAL;
}

+static inline int sata_pmp_set_lpm(struct ata_link *link,
+ enum ata_lpm_policy policy, unsigned hints)
+{
+ return -EINVAL;
+}
+
static inline int sata_pmp_attach(struct ata_device *dev)
{
return -EINVAL;
diff --git a/drivers/ata/pata_bf54x.c b/drivers/ata/pata_bf54x.c
index 9cae65d..ec2c777 100644
--- a/drivers/ata/pata_bf54x.c
+++ b/drivers/ata/pata_bf54x.c
@@ -826,7 +826,7 @@ static void bfin_dev_select(struct ata_port *ap, unsigned int device)
* @ctl: value to write
*/

-static u8 bfin_set_devctl(struct ata_port *ap, u8 ctl)
+static void bfin_set_devctl(struct ata_port *ap, u8 ctl)
{
void __iomem *base = (void __iomem *)ap->ioaddr.ctl_addr;
write_atapi_register(base, ATA_REG_CTRL, ctl);
@@ -1046,7 +1046,7 @@ static void bfin_bus_post_reset(struct ata_port *ap, unsigned int devmask)
dev1 = 0;
break;
}
- msleep(50); /* give drive a breather */
+ ata_msleep(ap, 50); /* give drive a breather */
}
if (dev1)
ata_sff_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT);
@@ -1087,7 +1087,7 @@ static unsigned int bfin_bus_softreset(struct ata_port *ap,
*
* Old drivers/ide uses the 2mS rule and then waits for ready
*/
- msleep(150);
+ ata_msleep(ap, 150);

/* Before we perform post reset processing we want to see if
* the bus shows 0xFF because the odd clown forgets the D7
diff --git a/drivers/ata/pata_cmd640.c b/drivers/ata/pata_cmd640.c
index e5f289f..549d28d 100644
--- a/drivers/ata/pata_cmd640.c
+++ b/drivers/ata/pata_cmd640.c
@@ -161,6 +161,17 @@ static int cmd640_port_start(struct ata_port *ap)
return 0;
}

+static bool cmd640_sff_irq_check(struct ata_port *ap)
+{
+ struct pci_dev *pdev = to_pci_dev(ap->host->dev);
+ int irq_reg = ap->port_no ? ARTIM23 : CFR;
+ u8 irq_stat, irq_mask = ap->port_no ? 0x10 : 0x04;
+
+ pci_read_config_byte(pdev, irq_reg, &irq_stat);
+
+ return irq_stat & irq_mask;
+}
+
static struct scsi_host_template cmd640_sht = {
ATA_PIO_SHT(DRV_NAME),
};
@@ -169,6 +180,7 @@ static struct ata_port_operations cmd640_port_ops = {
.inherits = &ata_sff_port_ops,
/* In theory xfer_noirq is not needed once we kill the prefetcher */
.sff_data_xfer = ata_sff_data_xfer_noirq,
+ .sff_irq_check = cmd640_sff_irq_check,
.qc_issue = cmd640_qc_issue,
.cable_detect = ata_cable_40wire,
.set_piomode = cmd640_set_piomode,
diff --git a/drivers/ata/pata_pdc202xx_old.c b/drivers/ata/pata_pdc202xx_old.c
index c39f213..c2ed586 100644
--- a/drivers/ata/pata_pdc202xx_old.c
+++ b/drivers/ata/pata_pdc202xx_old.c
@@ -44,6 +44,27 @@ static void pdc202xx_exec_command(struct ata_port *ap,
ndelay(400);
}

+static bool pdc202xx_irq_check(struct ata_port *ap)
+{
+ struct pci_dev *pdev = to_pci_dev(ap->host->dev);
+ unsigned long master = pci_resource_start(pdev, 4);
+ u8 sc1d = inb(master + 0x1d);
+
+ if (ap->port_no) {
+ /*
+ * bit 7: error, bit 6: interrupting,
+ * bit 5: FIFO full, bit 4: FIFO empty
+ */
+ return sc1d & 0x40;
+ } else {
+ /*
+ * bit 3: error, bit 2: interrupting,
+ * bit 1: FIFO full, bit 0: FIFO empty
+ */
+ return sc1d & 0x04;
+ }
+}
+
/**
* pdc202xx_configure_piomode - set chip PIO timing
* @ap: ATA interface
@@ -282,6 +303,7 @@ static struct ata_port_operations pdc2024x_port_ops = {
.set_dmamode = pdc202xx_set_dmamode,

.sff_exec_command = pdc202xx_exec_command,
+ .sff_irq_check = pdc202xx_irq_check,
};

static struct ata_port_operations pdc2026x_port_ops = {
@@ -297,6 +319,7 @@ static struct ata_port_operations pdc2026x_port_ops = {
.port_start = pdc2026x_port_start,

.sff_exec_command = pdc202xx_exec_command,
+ .sff_irq_check = pdc202xx_irq_check,
};

static int pdc202xx_init_one(struct pci_dev *dev, const struct pci_device_id *id)
diff --git a/drivers/ata/pata_samsung_cf.c b/drivers/ata/pata_samsung_cf.c
index 6f9cfb2..8a51d67 100644
--- a/drivers/ata/pata_samsung_cf.c
+++ b/drivers/ata/pata_samsung_cf.c
@@ -322,7 +322,7 @@ static int pata_s3c_wait_after_reset(struct ata_link *link,
{
int rc;

- msleep(ATA_WAIT_AFTER_RESET);
+ ata_msleep(link->ap, ATA_WAIT_AFTER_RESET);

/* always check readiness of the master device */
rc = ata_sff_wait_ready(link, deadline);
diff --git a/drivers/ata/pata_scc.c b/drivers/ata/pata_scc.c
index fe36966..093715c 100644
--- a/drivers/ata/pata_scc.c
+++ b/drivers/ata/pata_scc.c
@@ -530,7 +530,7 @@ static int scc_wait_after_reset(struct ata_link *link, unsigned int devmask,
*
* Old drivers/ide uses the 2mS rule and then waits for ready.
*/
- msleep(150);
+ ata_msleep(ap, 150);

/* always check readiness of the master device */
rc = ata_sff_wait_ready(link, deadline);
@@ -559,7 +559,7 @@ static int scc_wait_after_reset(struct ata_link *link, unsigned int devmask,
lbal = in_be32(ioaddr->lbal_addr);
if ((nsect == 1) && (lbal == 1))
break;
- msleep(50); /* give drive a breather */
+ ata_msleep(ap, 50); /* give drive a breather */
}

rc = ata_sff_wait_ready(link, deadline);
diff --git a/drivers/ata/pata_sil680.c b/drivers/ata/pata_sil680.c
index d3190d7..00eefbd 100644
--- a/drivers/ata/pata_sil680.c
+++ b/drivers/ata/pata_sil680.c
@@ -202,14 +202,25 @@ static void sil680_set_dmamode(struct ata_port *ap, struct ata_device *adev)
* LOCKING:
* spin_lock_irqsave(host lock)
*/
-void sil680_sff_exec_command(struct ata_port *ap,
- const struct ata_taskfile *tf)
+static void sil680_sff_exec_command(struct ata_port *ap,
+ const struct ata_taskfile *tf)
{
DPRINTK("ata%u: cmd 0x%X\n", ap->print_id, tf->command);
iowrite8(tf->command, ap->ioaddr.command_addr);
ioread8(ap->ioaddr.bmdma_addr + ATA_DMA_CMD);
}

+static bool sil680_sff_irq_check(struct ata_port *ap)
+{
+ struct pci_dev *pdev = to_pci_dev(ap->host->dev);
+ unsigned long addr = sil680_selreg(ap, 1);
+ u8 val;
+
+ pci_read_config_byte(pdev, addr, &val);
+
+ return val & 0x08;
+}
+
static struct scsi_host_template sil680_sht = {
ATA_BMDMA_SHT(DRV_NAME),
};
@@ -218,6 +229,7 @@ static struct scsi_host_template sil680_sht = {
static struct ata_port_operations sil680_port_ops = {
.inherits = &ata_bmdma32_port_ops,
.sff_exec_command = sil680_sff_exec_command,
+ .sff_irq_check = sil680_sff_irq_check,
.cable_detect = sil680_cable_detect,
.set_piomode = sil680_set_piomode,
.set_dmamode = sil680_set_dmamode,
diff --git a/drivers/ata/pata_sl82c105.c b/drivers/ata/pata_sl82c105.c
index 98548f6..7f5d020 100644
--- a/drivers/ata/pata_sl82c105.c
+++ b/drivers/ata/pata_sl82c105.c
@@ -227,6 +227,16 @@ static int sl82c105_qc_defer(struct ata_queued_cmd *qc)
return 0;
}

+static bool sl82c105_sff_irq_check(struct ata_port *ap)
+{
+ struct pci_dev *pdev = to_pci_dev(ap->host->dev);
+ u32 val, mask = ap->port_no ? CTRL_IDE_IRQB : CTRL_IDE_IRQA;
+
+ pci_read_config_dword(pdev, 0x40, &val);
+
+ return val & mask;
+}
+
static struct scsi_host_template sl82c105_sht = {
ATA_BMDMA_SHT(DRV_NAME),
};
@@ -239,6 +249,7 @@ static struct ata_port_operations sl82c105_port_ops = {
.cable_detect = ata_cable_40wire,
.set_piomode = sl82c105_set_piomode,
.prereset = sl82c105_pre_reset,
+ .sff_irq_check = sl82c105_sff_irq_check,
};

/**
diff --git a/drivers/ata/sata_fsl.c b/drivers/ata/sata_fsl.c
index 7325f77..b0214d0 100644
--- a/drivers/ata/sata_fsl.c
+++ b/drivers/ata/sata_fsl.c
@@ -678,7 +678,7 @@ static void sata_fsl_port_stop(struct ata_port *ap)
iowrite32(temp, hcr_base + HCONTROL);

/* Poll for controller to go offline - should happen immediately */
- ata_wait_register(hcr_base + HSTATUS, ONLINE, ONLINE, 1, 1);
+ ata_wait_register(ap, hcr_base + HSTATUS, ONLINE, ONLINE, 1, 1);

ap->private_data = NULL;
dma_free_coherent(dev, SATA_FSL_PORT_PRIV_DMA_SZ,
@@ -729,7 +729,8 @@ try_offline_again:
iowrite32(temp, hcr_base + HCONTROL);

/* Poll for controller to go offline */
- temp = ata_wait_register(hcr_base + HSTATUS, ONLINE, ONLINE, 1, 500);
+ temp = ata_wait_register(ap, hcr_base + HSTATUS, ONLINE, ONLINE,
+ 1, 500);

if (temp & ONLINE) {
ata_port_printk(ap, KERN_ERR,
@@ -752,7 +753,7 @@ try_offline_again:
/*
* PHY reset should remain asserted for atleast 1ms
*/
- msleep(1);
+ ata_msleep(ap, 1);

/*
* Now, bring the host controller online again, this can take time
@@ -766,7 +767,7 @@ try_offline_again:
temp |= HCONTROL_PMP_ATTACHED;
iowrite32(temp, hcr_base + HCONTROL);

- temp = ata_wait_register(hcr_base + HSTATUS, ONLINE, 0, 1, 500);
+ temp = ata_wait_register(ap, hcr_base + HSTATUS, ONLINE, 0, 1, 500);

if (!(temp & ONLINE)) {
ata_port_printk(ap, KERN_ERR,
@@ -784,7 +785,7 @@ try_offline_again:
* presence
*/

- temp = ata_wait_register(hcr_base + HSTATUS, 0xFF, 0, 1, 500);
+ temp = ata_wait_register(ap, hcr_base + HSTATUS, 0xFF, 0, 1, 500);
if ((!(temp & 0x10)) || ata_link_offline(link)) {
ata_port_printk(ap, KERN_WARNING,
"No Device OR PHYRDY change,Hstatus = 0x%x\n",
@@ -797,7 +798,7 @@ try_offline_again:
* Wait for the first D2H from device,i.e,signature update notification
*/
start_jiffies = jiffies;
- temp = ata_wait_register(hcr_base + HSTATUS, 0xFF, 0x10,
+ temp = ata_wait_register(ap, hcr_base + HSTATUS, 0xFF, 0x10,
500, jiffies_to_msecs(deadline - start_jiffies));

if ((temp & 0xFF) != 0x18) {
@@ -880,7 +881,7 @@ static int sata_fsl_softreset(struct ata_link *link, unsigned int *class,
iowrite32(pmp, CQPMP + hcr_base);
iowrite32(1, CQ + hcr_base);

- temp = ata_wait_register(CQ + hcr_base, 0x1, 0x1, 1, 5000);
+ temp = ata_wait_register(ap, CQ + hcr_base, 0x1, 0x1, 1, 5000);
if (temp & 0x1) {
ata_port_printk(ap, KERN_WARNING, "ATA_SRST issue failed\n");

@@ -896,7 +897,7 @@ static int sata_fsl_softreset(struct ata_link *link, unsigned int *class,
goto err;
}

- msleep(1);
+ ata_msleep(ap, 1);

/*
* SATA device enters reset state after receving a Control register
@@ -915,7 +916,7 @@ static int sata_fsl_softreset(struct ata_link *link, unsigned int *class,
if (pmp != SATA_PMP_CTRL_PORT)
iowrite32(pmp, CQPMP + hcr_base);
iowrite32(1, CQ + hcr_base);
- msleep(150); /* ?? */
+ ata_msleep(ap, 150); /* ?? */

/*
* The above command would have signalled an interrupt on command
@@ -1137,17 +1138,13 @@ static void sata_fsl_host_intr(struct ata_port *ap)
ioread32(hcr_base + CE));

for (i = 0; i < SATA_FSL_QUEUE_DEPTH; i++) {
- if (done_mask & (1 << i)) {
- qc = ata_qc_from_tag(ap, i);
- if (qc) {
- ata_qc_complete(qc);
- }
+ if (done_mask & (1 << i))
DPRINTK
("completing ncq cmd,tag=%d,CC=0x%x,CA=0x%x\n",
i, ioread32(hcr_base + CC),
ioread32(hcr_base + CA));
- }
}
+ ata_qc_complete_multiple(ap, ap->qc_active ^ done_mask);
return;

} else if ((ap->qc_active & (1 << ATA_TAG_INTERNAL))) {
diff --git a/drivers/ata/sata_inic162x.c b/drivers/ata/sata_inic162x.c
index a36149e..83a4447 100644
--- a/drivers/ata/sata_inic162x.c
+++ b/drivers/ata/sata_inic162x.c
@@ -614,7 +614,7 @@ static int inic_hardreset(struct ata_link *link, unsigned int *class,

writew(IDMA_CTL_RST_ATA, idma_ctl);
readw(idma_ctl); /* flush */
- msleep(1);
+ ata_msleep(ap, 1);
writew(0, idma_ctl);

rc = sata_link_resume(link, timing, deadline);
diff --git a/drivers/ata/sata_mv.c b/drivers/ata/sata_mv.c
index a9fd970..bf74a36 100644
--- a/drivers/ata/sata_mv.c
+++ b/drivers/ata/sata_mv.c
@@ -2743,18 +2743,11 @@ static void mv_err_intr(struct ata_port *ap)
}
}

-static void mv_process_crpb_response(struct ata_port *ap,
+static bool mv_process_crpb_response(struct ata_port *ap,
struct mv_crpb *response, unsigned int tag, int ncq_enabled)
{
u8 ata_status;
u16 edma_status = le16_to_cpu(response->flags);
- struct ata_queued_cmd *qc = ata_qc_from_tag(ap, tag);
-
- if (unlikely(!qc)) {
- ata_port_printk(ap, KERN_ERR, "%s: no qc for tag=%d\n",
- __func__, tag);
- return;
- }

/*
* edma_status from a response queue entry:
@@ -2768,13 +2761,14 @@ static void mv_process_crpb_response(struct ata_port *ap,
* Error will be seen/handled by
* mv_err_intr(). So do nothing at all here.
*/
- return;
+ return false;
}
}
ata_status = edma_status >> CRPB_FLAG_STATUS_SHIFT;
if (!ac_err_mask(ata_status))
- ata_qc_complete(qc);
+ return true;
/* else: leave it for mv_err_intr() */
+ return false;
}

static void mv_process_crpb_entries(struct ata_port *ap, struct mv_port_priv *pp)
@@ -2783,6 +2777,7 @@ static void mv_process_crpb_entries(struct ata_port *ap, struct mv_port_priv *pp
struct mv_host_priv *hpriv = ap->host->private_data;
u32 in_index;
bool work_done = false;
+ u32 done_mask = 0;
int ncq_enabled = (pp->pp_flags & MV_PP_FLAG_NCQ_EN);

/* Get the hardware queue position index */
@@ -2803,15 +2798,19 @@ static void mv_process_crpb_entries(struct ata_port *ap, struct mv_port_priv *pp
/* Gen II/IIE: get command tag from CRPB entry */
tag = le16_to_cpu(response->id) & 0x1f;
}
- mv_process_crpb_response(ap, response, tag, ncq_enabled);
+ if (mv_process_crpb_response(ap, response, tag, ncq_enabled))
+ done_mask |= 1 << tag;
work_done = true;
}

- /* Update the software queue position index in hardware */
- if (work_done)
+ if (work_done) {
+ ata_qc_complete_multiple(ap, ap->qc_active ^ done_mask);
+
+ /* Update the software queue position index in hardware */
writelfl((pp->crpb_dma & EDMA_RSP_Q_BASE_LO_MASK) |
(pp->resp_idx << EDMA_RSP_Q_PTR_SHIFT),
port_mmio + EDMA_RSP_Q_OUT_PTR);
+ }
}

static void mv_port_intr(struct ata_port *ap, u32 port_cause)
diff --git a/drivers/ata/sata_nv.c b/drivers/ata/sata_nv.c
index cb89ef8..7254e25 100644
--- a/drivers/ata/sata_nv.c
+++ b/drivers/ata/sata_nv.c
@@ -873,29 +873,11 @@ static int nv_adma_check_cpb(struct ata_port *ap, int cpb_num, int force_err)
ata_port_freeze(ap);
else
ata_port_abort(ap);
- return 1;
+ return -1;
}

- if (likely(flags & NV_CPB_RESP_DONE)) {
- struct ata_queued_cmd *qc = ata_qc_from_tag(ap, cpb_num);
- VPRINTK("CPB flags done, flags=0x%x\n", flags);
- if (likely(qc)) {
- DPRINTK("Completing qc from tag %d\n", cpb_num);
- ata_qc_complete(qc);
- } else {
- struct ata_eh_info *ehi = &ap->link.eh_info;
- /* Notifier bits set without a command may indicate the drive
- is misbehaving. Raise host state machine violation on this
- condition. */
- ata_port_printk(ap, KERN_ERR,
- "notifier for tag %d with no cmd?\n",
- cpb_num);
- ehi->err_mask |= AC_ERR_HSM;
- ehi->action |= ATA_EH_RESET;
- ata_port_freeze(ap);
- return 1;
- }
- }
+ if (likely(flags & NV_CPB_RESP_DONE))
+ return 1;
return 0;
}

@@ -1018,6 +1000,7 @@ static irqreturn_t nv_adma_interrupt(int irq, void *dev_instance)
NV_ADMA_STAT_CPBERR |
NV_ADMA_STAT_CMD_COMPLETE)) {
u32 check_commands = notifier_clears[i];
+ u32 done_mask = 0;
int pos, rc;

if (status & NV_ADMA_STAT_CPBERR) {
@@ -1034,10 +1017,13 @@ static irqreturn_t nv_adma_interrupt(int irq, void *dev_instance)
pos--;
rc = nv_adma_check_cpb(ap, pos,
notifier_error & (1 << pos));
- if (unlikely(rc))
+ if (rc > 0)
+ done_mask |= 1 << pos;
+ else if (unlikely(rc < 0))
check_commands = 0;
check_commands &= ~(1 << pos);
}
+ ata_qc_complete_multiple(ap, ap->qc_active ^ done_mask);
}
}

@@ -2132,7 +2118,6 @@ static int nv_swncq_sdbfis(struct ata_port *ap)
struct ata_eh_info *ehi = &ap->link.eh_info;
u32 sactive;
u32 done_mask;
- int i;
u8 host_stat;
u8 lack_dhfis = 0;

@@ -2152,27 +2137,11 @@ static int nv_swncq_sdbfis(struct ata_port *ap)
sactive = readl(pp->sactive_block);
done_mask = pp->qc_active ^ sactive;

- if (unlikely(done_mask & sactive)) {
- ata_ehi_clear_desc(ehi);
- ata_ehi_push_desc(ehi, "illegal SWNCQ:qc_active transition"
- "(%08x->%08x)", pp->qc_active, sactive);
- ehi->err_mask |= AC_ERR_HSM;
- ehi->action |= ATA_EH_RESET;
- return -EINVAL;
- }
- for (i = 0; i < ATA_MAX_QUEUE; i++) {
- if (!(done_mask & (1 << i)))
- continue;
-
- qc = ata_qc_from_tag(ap, i);
- if (qc) {
- ata_qc_complete(qc);
- pp->qc_active &= ~(1 << i);
- pp->dhfis_bits &= ~(1 << i);
- pp->dmafis_bits &= ~(1 << i);
- pp->sdbfis_bits |= (1 << i);
- }
- }
+ pp->qc_active &= ~done_mask;
+ pp->dhfis_bits &= ~done_mask;
+ pp->dmafis_bits &= ~done_mask;
+ pp->sdbfis_bits |= done_mask;
+ ata_qc_complete_multiple(ap, ap->qc_active ^ done_mask);

if (!ap->qc_active) {
DPRINTK("over\n");
diff --git a/drivers/ata/sata_sil24.c b/drivers/ata/sata_sil24.c
index be7726d..af41c6f 100644
--- a/drivers/ata/sata_sil24.c
+++ b/drivers/ata/sata_sil24.c
@@ -589,9 +589,9 @@ static int sil24_init_port(struct ata_port *ap)
sil24_clear_pmp(ap);

writel(PORT_CS_INIT, port + PORT_CTRL_STAT);
- ata_wait_register(port + PORT_CTRL_STAT,
+ ata_wait_register(ap, port + PORT_CTRL_STAT,
PORT_CS_INIT, PORT_CS_INIT, 10, 100);
- tmp = ata_wait_register(port + PORT_CTRL_STAT,
+ tmp = ata_wait_register(ap, port + PORT_CTRL_STAT,
PORT_CS_RDY, 0, 10, 100);

if ((tmp & (PORT_CS_INIT | PORT_CS_RDY)) != PORT_CS_RDY) {
@@ -631,7 +631,7 @@ static int sil24_exec_polled_cmd(struct ata_port *ap, int pmp,
writel((u64)paddr >> 32, port + PORT_CMD_ACTIVATE + 4);

irq_mask = (PORT_IRQ_COMPLETE | PORT_IRQ_ERROR) << PORT_IRQ_RAW_SHIFT;
- irq_stat = ata_wait_register(port + PORT_IRQ_STAT, irq_mask, 0x0,
+ irq_stat = ata_wait_register(ap, port + PORT_IRQ_STAT, irq_mask, 0x0,
10, timeout_msec);

writel(irq_mask, port + PORT_IRQ_STAT); /* clear IRQs */
@@ -719,9 +719,9 @@ static int sil24_hardreset(struct ata_link *link, unsigned int *class,
"state, performing PORT_RST\n");

writel(PORT_CS_PORT_RST, port + PORT_CTRL_STAT);
- msleep(10);
+ ata_msleep(ap, 10);
writel(PORT_CS_PORT_RST, port + PORT_CTRL_CLR);
- ata_wait_register(port + PORT_CTRL_STAT, PORT_CS_RDY, 0,
+ ata_wait_register(ap, port + PORT_CTRL_STAT, PORT_CS_RDY, 0,
10, 5000);

/* restore port configuration */
@@ -740,7 +740,7 @@ static int sil24_hardreset(struct ata_link *link, unsigned int *class,
tout_msec = 5000;

writel(PORT_CS_DEV_RST, port + PORT_CTRL_STAT);
- tmp = ata_wait_register(port + PORT_CTRL_STAT,
+ tmp = ata_wait_register(ap, port + PORT_CTRL_STAT,
PORT_CS_DEV_RST, PORT_CS_DEV_RST, 10,
tout_msec);

@@ -1253,7 +1253,7 @@ static void sil24_init_controller(struct ata_host *host)
tmp = readl(port + PORT_CTRL_STAT);
if (tmp & PORT_CS_PORT_RST) {
writel(PORT_CS_PORT_RST, port + PORT_CTRL_CLR);
- tmp = ata_wait_register(port + PORT_CTRL_STAT,
+ tmp = ata_wait_register(NULL, port + PORT_CTRL_STAT,
PORT_CS_PORT_RST,
PORT_CS_PORT_RST, 10, 100);
if (tmp & PORT_CS_PORT_RST)
diff --git a/drivers/ata/sata_via.c b/drivers/ata/sata_via.c
index 4730c42..c215899 100644
--- a/drivers/ata/sata_via.c
+++ b/drivers/ata/sata_via.c
@@ -349,7 +349,7 @@ static int vt6420_prereset(struct ata_link *link, unsigned long deadline)

/* wait for phy to become ready, if necessary */
do {
- msleep(200);
+ ata_msleep(link->ap, 200);
svia_scr_read(link, SCR_STATUS, &sstatus);
if ((sstatus & 0xf) != 1)
break;
diff --git a/include/linux/ata.h b/include/linux/ata.h
index fe6e681..0c4929f 100644
--- a/include/linux/ata.h
+++ b/include/linux/ata.h
@@ -89,6 +89,7 @@ enum {
ATA_ID_SPG = 98,
ATA_ID_LBA_CAPACITY_2 = 100,
ATA_ID_SECTOR_SIZE = 106,
+ ATA_ID_LOGICAL_SECTOR_SIZE = 117, /* and 118 */
ATA_ID_LAST_LUN = 126,
ATA_ID_DLF = 128,
ATA_ID_CSFO = 129,
@@ -640,16 +641,49 @@ static inline int ata_id_flush_ext_enabled(const u16 *id)
return (id[ATA_ID_CFS_ENABLE_2] & 0x2400) == 0x2400;
}

-static inline int ata_id_has_large_logical_sectors(const u16 *id)
+static inline u32 ata_id_logical_sector_size(const u16 *id)
{
- if ((id[ATA_ID_SECTOR_SIZE] & 0xc000) != 0x4000)
- return 0;
- return id[ATA_ID_SECTOR_SIZE] & (1 << 13);
+ /* T13/1699-D Revision 6a, Sep 6, 2008. Page 128.
+ * IDENTIFY DEVICE data, word 117-118.
+ * 0xd000 ignores bit 13 (logical:physical > 1)
+ */
+ if ((id[ATA_ID_SECTOR_SIZE] & 0xd000) == 0x5000)
+ return (((id[ATA_ID_LOGICAL_SECTOR_SIZE+1] << 16)
+ + id[ATA_ID_LOGICAL_SECTOR_SIZE]) * sizeof(u16)) ;
+ return ATA_SECT_SIZE;
+}
+
+static inline u8 ata_id_log2_per_physical_sector(const u16 *id)
+{
+ /* T13/1699-D Revision 6a, Sep 6, 2008. Page 128.
+ * IDENTIFY DEVICE data, word 106.
+ * 0xe000 ignores bit 12 (logical sector > 512 bytes)
+ */
+ if ((id[ATA_ID_SECTOR_SIZE] & 0xe000) == 0x6000)
+ return (id[ATA_ID_SECTOR_SIZE] & 0xf);
+ return 0;
}

-static inline u16 ata_id_logical_per_physical_sectors(const u16 *id)
+/* Offset of logical sectors relative to physical sectors.
+ *
+ * If device has more than one logical sector per physical sector
+ * (aka 512 byte emulation), vendors might offset the "sector 0" address
+ * so sector 63 is "naturally aligned" - e.g. FAT partition table.
+ * This avoids Read/Mod/Write penalties when using FAT partition table
+ * and updating "well aligned" (FS perspective) physical sectors on every
+ * transaction.
+ */
+static inline u16 ata_id_logical_sector_offset(const u16 *id,
+ u8 log2_per_phys)
{
- return 1 << (id[ATA_ID_SECTOR_SIZE] & 0xf);
+ u16 word_209 = id[209];
+
+ if ((log2_per_phys > 1) && (word_209 & 0xc000) == 0x4000) {
+ u16 first = word_209 & 0x3fff;
+ if (first > 0)
+ return (1 << log2_per_phys) - first;
+ }
+ return 0;
}

static inline int ata_id_has_lba48(const u16 *id)
diff --git a/include/linux/libata.h b/include/linux/libata.h
index 45fb296..15b77b8 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -37,6 +37,7 @@
#include <scsi/scsi_host.h>
#include <linux/acpi.h>
#include <linux/cdrom.h>
+#include <linux/sched.h>

/*
* Define if arch has non-standard setup. This is a _PCI_ standard
@@ -172,6 +173,7 @@ enum {
ATA_LFLAG_NO_RETRY = (1 << 5), /* don't retry this link */
ATA_LFLAG_DISABLED = (1 << 6), /* link is disabled */
ATA_LFLAG_SW_ACTIVITY = (1 << 7), /* keep activity stats */
+ ATA_LFLAG_NO_LPM = (1 << 8), /* disable LPM on this link */

/* struct ata_port flags */
ATA_FLAG_SLAVE_POSS = (1 << 0), /* host supports slave dev */
@@ -196,7 +198,7 @@ enum {
ATA_FLAG_ACPI_SATA = (1 << 17), /* need native SATA ACPI layout */
ATA_FLAG_AN = (1 << 18), /* controller supports AN */
ATA_FLAG_PMP = (1 << 19), /* controller supports PMP */
- ATA_FLAG_IPM = (1 << 20), /* driver can handle IPM */
+ ATA_FLAG_LPM = (1 << 20), /* driver can handle LPM */
ATA_FLAG_EM = (1 << 21), /* driver supports enclosure
* management */
ATA_FLAG_SW_ACTIVITY = (1 << 22), /* driver supports sw activity
@@ -324,12 +326,11 @@ enum {
ATA_EH_HARDRESET = (1 << 2), /* meaningful only in ->prereset */
ATA_EH_RESET = ATA_EH_SOFTRESET | ATA_EH_HARDRESET,
ATA_EH_ENABLE_LINK = (1 << 3),
- ATA_EH_LPM = (1 << 4), /* link power management action */
ATA_EH_PARK = (1 << 5), /* unload heads and stop I/O */

ATA_EH_PERDEV_MASK = ATA_EH_REVALIDATE | ATA_EH_PARK,
ATA_EH_ALL_ACTIONS = ATA_EH_REVALIDATE | ATA_EH_RESET |
- ATA_EH_ENABLE_LINK | ATA_EH_LPM,
+ ATA_EH_ENABLE_LINK,

/* ata_eh_info->flags */
ATA_EHI_HOTPLUGGED = (1 << 0), /* could have been hotplugged */
@@ -341,7 +342,7 @@ enum {
ATA_EHI_DID_HARDRESET = (1 << 17), /* already soft-reset this port */
ATA_EHI_PRINTINFO = (1 << 18), /* print configuration info */
ATA_EHI_SETMODE = (1 << 19), /* configure transfer mode */
- ATA_EHI_POST_SETMODE = (1 << 20), /* revaildating after setmode */
+ ATA_EHI_POST_SETMODE = (1 << 20), /* revalidating after setmode */

ATA_EHI_DID_RESET = ATA_EHI_DID_SOFTRESET | ATA_EHI_DID_HARDRESET,

@@ -377,7 +378,6 @@ enum {
ATA_HORKAGE_BROKEN_HPA = (1 << 4), /* Broken HPA */
ATA_HORKAGE_DISABLE = (1 << 5), /* Disable it */
ATA_HORKAGE_HPA_SIZE = (1 << 6), /* native size off by one */
- ATA_HORKAGE_IPM = (1 << 7), /* Link PM problems */
ATA_HORKAGE_IVB = (1 << 8), /* cbl det validity bit bugs */
ATA_HORKAGE_STUCK_ERR = (1 << 9), /* stuck ERR on next PACKET */
ATA_HORKAGE_BRIDGE_OK = (1 << 10), /* no bridge limits */
@@ -464,6 +464,22 @@ enum ata_completion_errors {
AC_ERR_NCQ = (1 << 10), /* marker for offending NCQ qc */
};

+/*
+ * Link power management policy: If you alter this, you also need to
+ * alter libata-scsi.c (for the ascii descriptions)
+ */
+enum ata_lpm_policy {
+ ATA_LPM_UNKNOWN,
+ ATA_LPM_MAX_POWER,
+ ATA_LPM_MED_POWER,
+ ATA_LPM_MIN_POWER,
+};
+
+enum ata_lpm_hints {
+ ATA_LPM_EMPTY = (1 << 0), /* port empty/probing */
+ ATA_LPM_HIPM = (1 << 1), /* may use HIPM */
+};
+
/* forward declarations */
struct scsi_device;
struct ata_port_operations;
@@ -478,16 +494,6 @@ typedef int (*ata_reset_fn_t)(struct ata_link *link, unsigned int *classes,
unsigned long deadline);
typedef void (*ata_postreset_fn_t)(struct ata_link *link, unsigned int *classes);

-/*
- * host pm policy: If you alter this, you also need to alter libata-scsi.c
- * (for the ascii descriptions)
- */
-enum link_pm {
- NOT_AVAILABLE,
- MIN_POWER,
- MAX_PERFORMANCE,
- MEDIUM_POWER,
-};
extern struct device_attribute dev_attr_link_power_management_policy;
extern struct device_attribute dev_attr_unload_heads;
extern struct device_attribute dev_attr_em_message_type;
@@ -530,6 +536,10 @@ struct ata_host {
void *private_data;
struct ata_port_operations *ops;
unsigned long flags;
+
+ struct mutex eh_mutex;
+ struct task_struct *eh_owner;
+
#ifdef CONFIG_ATA_ACPI
acpi_handle acpi_handle;
#endif
@@ -560,13 +570,13 @@ struct ata_queued_cmd {
unsigned int extrabytes;
unsigned int curbytes;

- struct scatterlist *cursg;
- unsigned int cursg_ofs;
-
struct scatterlist sgent;

struct scatterlist *sg;

+ struct scatterlist *cursg;
+ unsigned int cursg_ofs;
+
unsigned int err_mask;
struct ata_taskfile result_tf;
ata_qc_cb_t complete_fn;
@@ -604,6 +614,7 @@ 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 +701,7 @@ 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 */

@@ -699,6 +711,7 @@ struct ata_link {
unsigned int hw_sata_spd_limit;
unsigned int sata_spd_limit;
unsigned int sata_spd; /* current SATA PHY speed */
+ enum ata_lpm_policy lpm_policy;

/* record runtime error info, protected by host_set lock */
struct ata_eh_info eh_info;
@@ -707,6 +720,8 @@ 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 +767,7 @@ 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;
@@ -767,7 +783,7 @@ struct ata_port {

pm_message_t pm_mesg;
int *pm_result;
- enum link_pm pm_policy;
+ enum ata_lpm_policy target_lpm_policy;

struct timer_list fastdrain_timer;
unsigned long fastdrain_cnt;
@@ -833,8 +849,8 @@ struct ata_port_operations {
int (*scr_write)(struct ata_link *link, unsigned int sc_reg, u32 val);
void (*pmp_attach)(struct ata_port *ap);
void (*pmp_detach)(struct ata_port *ap);
- int (*enable_pm)(struct ata_port *ap, enum link_pm policy);
- void (*disable_pm)(struct ata_port *ap);
+ int (*set_lpm)(struct ata_link *link, enum ata_lpm_policy policy,
+ unsigned hints);

/*
* Start, stop, suspend and resume
@@ -946,6 +962,8 @@ extern int sata_link_debounce(struct ata_link *link,
const unsigned long *params, unsigned long deadline);
extern int sata_link_resume(struct ata_link *link, const unsigned long *params,
unsigned long deadline);
+extern int sata_link_scr_lpm(struct ata_link *link, enum ata_lpm_policy policy,
+ bool spm_wakeup);
extern int sata_link_hardreset(struct ata_link *link,
const unsigned long *timing, unsigned long deadline,
bool *online, int (*check_ready)(struct ata_link *));
@@ -991,8 +1009,9 @@ extern int ata_host_suspend(struct ata_host *host, pm_message_t mesg);
extern void ata_host_resume(struct ata_host *host);
#endif
extern int ata_ratelimit(void);
-extern u32 ata_wait_register(void __iomem *reg, u32 mask, u32 val,
- unsigned long interval, unsigned long timeout);
+extern void ata_msleep(struct ata_port *ap, unsigned int msecs);
+extern u32 ata_wait_register(struct ata_port *ap, void __iomem *reg, u32 mask,
+ u32 val, unsigned long interval, unsigned long timeout);
extern int atapi_cmd_type(u8 opcode);
extern void ata_tf_to_fis(const struct ata_taskfile *tf,
u8 pmp, int is_cmd, u8 *fis);

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