[git patches] 2.4.x SATA update

From: Jeff Garzik
Date: Thu Jul 28 2005 - 14:50:26 EST

Next message: Christoph Lameter: "Re: Alternative to TIF_FREEZE -> a notifier in the task_struct?"
Previous message: blaisorblade: "[patch 1/2] doc: describe Kbuild pitfall"
Next in thread: Sergey Vlasov: "Re: [git patches] 2.4.x SATA update"
Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]

Please pull from the 'upstream' branch of
rsync://rsync.kernel.org/pub/scm/linux/kernel/git/jgarzik/libata-2.4.git

which will update 2.4.x SATA to the latest, according to the attached diffstat/changelog/patch.

drivers/scsi/ahci.c | 127 ++++++---
drivers/scsi/ata_piix.c | 32 +-
drivers/scsi/libata-core.c | 555 +++++++++++++++++++++++++++++++++++++-----
drivers/scsi/libata-scsi.c | 18 -
drivers/scsi/libata.h | 2
drivers/scsi/sata_nv.c | 2
drivers/scsi/sata_promise.c | 30 ++
drivers/scsi/sata_qstor.c | 2
drivers/scsi/sata_sil.c | 10
drivers/scsi/sata_sis.c | 1
drivers/scsi/sata_svw.c | 28 +-
drivers/scsi/sata_sx4.c | 2
drivers/scsi/sata_uli.c | 1
drivers/scsi/sata_via.c | 1
drivers/scsi/sata_vsc.c | 1
include/linux/ata.h | 1
include/linux/libata-compat.h | 3
include/linux/libata.h | 67 +++++
18 files changed, 741 insertions(+), 142 deletions(-)

commit c9a8f5ab981ced23e95b72b25aa83e37880f2287
Author: Jeff Garzik <jgarzik@xxxxxxxxx>
Date: Sat Jul 23 20:12:48 2005 -0400

libata: update to 2.6.x latest

Minor stuff:
* doc updates
* pci id updates
* new ->host_stop behavior
* fix bugs in PIO data xfer, SATA probe, large disk SCSI xlat

diff --git a/drivers/scsi/ahci.c b/drivers/scsi/ahci.c
--- a/drivers/scsi/ahci.c
+++ b/drivers/scsi/ahci.c
@@ -38,7 +38,8 @@
#include <asm/io.h>

#define DRV_NAME "ahci"
-#define DRV_VERSION "1.00"
+#define DRV_VERSION "1.01"
+

enum {
AHCI_PCI_BAR = 5,
@@ -48,6 +49,7 @@ enum {
AHCI_CMD_SLOT_SZ = 32 * 32,
AHCI_RX_FIS_SZ = 256,
AHCI_CMD_TBL_HDR = 0x80,
+ AHCI_CMD_TBL_CDB = 0x40,
AHCI_CMD_TBL_SZ = AHCI_CMD_TBL_HDR + (AHCI_MAX_SG * 16),
AHCI_PORT_PRIV_DMA_SZ = AHCI_CMD_SLOT_SZ + AHCI_CMD_TBL_SZ +
AHCI_RX_FIS_SZ,
@@ -132,6 +134,9 @@ enum {
PORT_CMD_ICC_ACTIVE = (0x1 << 28), /* Put i/f in active state */
PORT_CMD_ICC_PARTIAL = (0x2 << 28), /* Put i/f in partial state */
PORT_CMD_ICC_SLUMBER = (0x6 << 28), /* Put i/f in slumber state */
+
+ /* hpriv->flags bits */
+ AHCI_FLAG_MSI = (1 << 0),
};

struct ahci_cmd_hdr {
@@ -181,13 +186,14 @@ static void ahci_qc_prep(struct ata_queu
static u8 ahci_check_status(struct ata_port *ap);
static u8 ahci_check_err(struct ata_port *ap);
static inline int ahci_host_intr(struct ata_port *ap, struct ata_queued_cmd *qc);
+static void ahci_remove_one (struct pci_dev *pdev);

static Scsi_Host_Template ahci_sht = {
.module = THIS_MODULE,
.name = DRV_NAME,
- .ioctl = ata_scsi_ioctl,
.detect = ata_scsi_detect,
.release = ata_scsi_release,
+ .ioctl = ata_scsi_ioctl,
.queuecommand = ata_scsi_queuecmd,
.eh_strategy_handler = ata_scsi_error,
.can_queue = ATA_DEF_QUEUE,
@@ -256,6 +262,12 @@ static struct pci_device_id ahci_pci_tbl
board_ahci }, /* ICH7R */
{ PCI_VENDOR_ID_AL, 0x5288, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
board_ahci }, /* ULi M5288 */
+ { PCI_VENDOR_ID_INTEL, 0x2681, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
+ board_ahci }, /* ESB2 */
+ { PCI_VENDOR_ID_INTEL, 0x2682, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
+ board_ahci }, /* ESB2 */
+ { PCI_VENDOR_ID_INTEL, 0x2683, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
+ board_ahci }, /* ESB2 */
{ } /* terminate list */
};

@@ -264,7 +276,7 @@ static struct pci_driver ahci_pci_driver
.name = DRV_NAME,
.id_table = ahci_pci_tbl,
.probe = ahci_init_one,
- .remove = ata_pci_remove_one,
+ .remove = ahci_remove_one,
};

@@ -282,6 +294,8 @@ static void ahci_host_stop(struct ata_ho
{
struct ahci_host_priv *hpriv = host_set->private_data;
kfree(hpriv);
+
+ ata_host_stop(host_set);
}

static int ahci_port_start(struct ata_port *ap)
@@ -289,26 +303,19 @@ static int ahci_port_start(struct ata_po
struct device *dev = ap->host_set->dev;
struct ahci_host_priv *hpriv = ap->host_set->private_data;
struct ahci_port_priv *pp;
- int rc;
void *mem, *mmio = ap->host_set->mmio_base;
void *port_mmio = ahci_port_base(mmio, ap->port_no);
dma_addr_t mem_dma;

- rc = ata_port_start(ap);
- if (rc)
- return rc;
-
pp = kmalloc(sizeof(*pp), GFP_KERNEL);
- if (!pp) {
- rc = -ENOMEM;
- goto err_out;
- }
+ if (!pp)
+ return -ENOMEM;
memset(pp, 0, sizeof(*pp));

mem = dma_alloc_coherent(dev, AHCI_PORT_PRIV_DMA_SZ, &mem_dma, GFP_KERNEL);
if (!mem) {
- rc = -ENOMEM;
- goto err_out_kfree;
+ kfree(pp);
+ return -ENOMEM;
}
memset(mem, 0, AHCI_PORT_PRIV_DMA_SZ);

@@ -358,12 +365,6 @@ static int ahci_port_start(struct ata_po
readl(port_mmio + PORT_CMD); /* flush */

return 0;
-
-err_out_kfree:
- kfree(pp);
-err_out:
- ata_port_stop(ap);
- return rc;
}

@@ -389,7 +390,6 @@ static void ahci_port_stop(struct ata_po
dma_free_coherent(dev, AHCI_PORT_PRIV_DMA_SZ,
pp->cmd_slot, pp->cmd_slot_dma);
kfree(pp);
- ata_port_stop(ap);
}

static u32 ahci_scr_read (struct ata_port *ap, unsigned int sc_reg_in)
@@ -496,7 +496,8 @@ static void ahci_fill_sg(struct ata_queu

static void ahci_qc_prep(struct ata_queued_cmd *qc)
{
- struct ahci_port_priv *pp = qc->ap->private_data;
+ struct ata_port *ap = qc->ap;
+ struct ahci_port_priv *pp = ap->private_data;
u32 opts;
const u32 cmd_fis_len = 5; /* five dwords */

@@ -508,18 +509,8 @@ static void ahci_qc_prep(struct ata_queu
opts = (qc->n_elem << 16) | cmd_fis_len;
if (qc->tf.flags & ATA_TFLAG_WRITE)
opts |= AHCI_CMD_WRITE;
-
- switch (qc->tf.protocol) {
- case ATA_PROT_ATAPI:
- case ATA_PROT_ATAPI_NODATA:
- case ATA_PROT_ATAPI_DMA:
+ if (is_atapi_taskfile(&qc->tf))
opts |= AHCI_CMD_ATAPI;
- break;
-
- default:
- /* do nothing */
- break;
- }

pp->cmd_slot[0].opts = cpu_to_le32(opts);
pp->cmd_slot[0].status = 0;
@@ -531,6 +522,10 @@ static void ahci_qc_prep(struct ata_queu
* a SATA Register - Host to Device command FIS.
*/
ata_tf_to_fis(&qc->tf, pp->cmd_tbl, 0);
+ if (opts & AHCI_CMD_ATAPI) {
+ memset(pp->cmd_tbl + AHCI_CMD_TBL_CDB, 0, 32);
+ memcpy(pp->cmd_tbl + AHCI_CMD_TBL_CDB, qc->cdb, ap->cdb_len);
+ }

if (!(qc->flags & ATA_QCFLAG_DMAMAP))
return;
@@ -853,15 +848,19 @@ static int ahci_host_init(struct ata_pro
}

/* move to PCI layer, integrate w/ MSI stuff */
-static void pci_enable_intx(struct pci_dev *pdev)
+static void pci_intx(struct pci_dev *pdev, int enable)
{
- u16 pci_command;
+ u16 pci_command, new;

pci_read_config_word(pdev, PCI_COMMAND, &pci_command);
- if (pci_command & PCI_COMMAND_INTX_DISABLE) {
- pci_command &= ~PCI_COMMAND_INTX_DISABLE;
+
+ if (enable)
+ new = pci_command & ~PCI_COMMAND_INTX_DISABLE;
+ else
+ new = pci_command | PCI_COMMAND_INTX_DISABLE;
+
+ if (new != pci_command)
pci_write_config_word(pdev, PCI_COMMAND, pci_command);
- }
}

static void ahci_print_info(struct ata_probe_ent *probe_ent)
@@ -943,7 +942,7 @@ static int ahci_init_one (struct pci_dev
unsigned long base;
void *mmio_base;
unsigned int board_idx = (unsigned int) ent->driver_data;
- int pci_dev_busy = 0;
+ int have_msi, pci_dev_busy = 0;
int rc;

VPRINTK("ENTER\n");
@@ -961,12 +960,17 @@ static int ahci_init_one (struct pci_dev
goto err_out;
}

- pci_enable_intx(pdev);
+ if (pci_enable_msi(pdev) == 0)
+ have_msi = 1;
+ else {
+ pci_intx(pdev, 1);
+ have_msi = 0;
+ }

probe_ent = kmalloc(sizeof(*probe_ent), GFP_KERNEL);
if (probe_ent == NULL) {
rc = -ENOMEM;
- goto err_out_regions;
+ goto err_out_msi;
}

memset(probe_ent, 0, sizeof(*probe_ent));
@@ -999,6 +1003,9 @@ static int ahci_init_one (struct pci_dev
probe_ent->mmio_base = mmio_base;
probe_ent->private_data = hpriv;

+ if (have_msi)
+ hpriv->flags |= AHCI_FLAG_MSI;
+
/* initialize adapter */
rc = ahci_host_init(probe_ent);
if (rc)
@@ -1016,7 +1023,11 @@ err_out_iounmap:
iounmap(mmio_base);
err_out_free_ent:
kfree(probe_ent);
-err_out_regions:
+err_out_msi:
+ if (have_msi)
+ pci_disable_msi(pdev);
+ else
+ pci_intx(pdev, 0);
pci_release_regions(pdev);
err_out:
if (!pci_dev_busy)
@@ -1024,6 +1035,38 @@ err_out:
return rc;
}

+static void ahci_remove_one (struct pci_dev *pdev)
+{
+ struct device *dev = pci_dev_to_dev(pdev);
+ struct ata_host_set *host_set = dev_get_drvdata(dev);
+ struct ahci_host_priv *hpriv = host_set->private_data;
+ struct ata_port *ap;
+ Scsi_Host_Template *sht;
+ int have_msi, rc;
+
+ /* FIXME: this unregisters all ports attached to the
+ * Scsi_Host_Template given. We _might_ have multiple
+ * templates (though we don't ATM), so this is ok... for now.
+ */
+ ap = host_set->ports[0];
+ sht = ap->host->hostt;
+ rc = scsi_unregister_module(MODULE_SCSI_HA, sht);
+ /* FIXME: handle 'rc' failure? */
+
+ have_msi = hpriv->flags & AHCI_FLAG_MSI;
+ free_irq(host_set->irq, host_set);
+
+ host_set->ops->host_stop(host_set);
+ kfree(host_set);
+
+ if (have_msi)
+ pci_disable_msi(pdev);
+ else
+ pci_intx(pdev, 0);
+ pci_release_regions(pdev);
+ pci_disable_device(pdev);
+ dev_set_drvdata(dev, NULL);
+}

static int __init ahci_init(void)
{
diff --git a/drivers/scsi/ata_piix.c b/drivers/scsi/ata_piix.c
--- a/drivers/scsi/ata_piix.c
+++ b/drivers/scsi/ata_piix.c
@@ -61,6 +61,7 @@ enum {
ich6_sata = 3,
ich6_sata_rm = 4,
ich7_sata = 5,
+ esb2_sata = 6,
};

static int piix_init_one (struct pci_dev *pdev,
@@ -93,6 +94,7 @@ static struct pci_device_id piix_pci_tbl
{ 0x8086, 0x2653, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich6_sata_rm },
{ 0x8086, 0x27c0, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich7_sata },
{ 0x8086, 0x27c4, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich7_sata },
+ { 0x8086, 0x2680, PCI_ANY_ID, PCI_ANY_ID, 0, 0, esb2_sata },

{ } /* terminate list */
};
@@ -151,6 +153,7 @@ static struct ata_port_operations piix_p

.port_start = ata_port_start,
.port_stop = ata_port_stop,
+ .host_stop = ata_host_stop,
};

static struct ata_port_operations piix_sata_ops = {
@@ -178,6 +181,7 @@ static struct ata_port_operations piix_s

.port_start = ata_port_start,
.port_stop = ata_port_stop,
+ .host_stop = ata_host_stop,
};

static struct ata_port_info piix_port_info[] = {
@@ -256,6 +260,18 @@ static struct ata_port_info piix_port_in
.udma_mask = 0x7f, /* udma0-6 */
.port_ops = &piix_sata_ops,
},
+
+ /* esb2_sata */
+ {
+ .sht = &piix_sht,
+ .host_flags = ATA_FLAG_SATA | ATA_FLAG_SRST |
+ PIIX_FLAG_COMBINED | PIIX_FLAG_CHECKINTR |
+ ATA_FLAG_SLAVE_POSS | PIIX_FLAG_AHCI,
+ .pio_mask = 0x1f, /* pio0-4 */
+ .mwdma_mask = 0x07, /* mwdma0-2 */
+ .udma_mask = 0x7f, /* udma0-6 */
+ .port_ops = &piix_sata_ops,
+ },
};

static struct pci_bits piix_enable_bits[] = {
@@ -650,15 +666,6 @@ static int piix_init_one (struct pci_dev
return ata_pci_init_one(pdev, port_info, n_ports);
}

-/**
- * piix_init -
- *
- * LOCKING:
- *
- * RETURNS:
- *
- */
-
static int __init piix_init(void)
{
int rc;
@@ -685,13 +692,6 @@ err_out:
return rc;
}

-/**
- * piix_exit -
- *
- * LOCKING:
- *
- */
-
static void __exit piix_exit(void)
{
scsi_unregister_module(MODULE_SCSI_HA, &piix_sht);
diff --git a/drivers/scsi/libata-core.c b/drivers/scsi/libata-core.c
--- a/drivers/scsi/libata-core.c
+++ b/drivers/scsi/libata-core.c
@@ -185,6 +185,28 @@ static void ata_tf_load_mmio(struct ata_
ata_wait_idle(ap);
}

+
+/**
+ * ata_tf_load - send taskfile registers to host controller
+ * @ap: Port to which output is sent
+ * @tf: ATA taskfile register set
+ *
+ * Outputs ATA taskfile to standard ATA host controller using MMIO
+ * or PIO as indicated by the ATA_FLAG_MMIO flag.
+ * Writes the control, feature, nsect, lbal, lbam, and lbah registers.
+ * Optionally (ATA_TFLAG_LBA48) writes hob_feature, hob_nsect,
+ * hob_lbal, hob_lbam, and hob_lbah.
+ *
+ * This function waits for idle (!BUSY and !DRQ) after writing
+ * registers. If the control register has a new value, this
+ * function also waits for idle after writing control and before
+ * writing the remaining registers.
+ *
+ * May be used as the tf_load() entry in ata_port_operations.
+ *
+ * LOCKING:
+ * Inherited from caller.
+ */
void ata_tf_load(struct ata_port *ap, struct ata_taskfile *tf)
{
if (ap->flags & ATA_FLAG_MMIO)
@@ -194,11 +216,11 @@ void ata_tf_load(struct ata_port *ap, st
}

/**
- * ata_exec_command - issue ATA command to host controller
+ * ata_exec_command_pio - issue ATA command to host controller
* @ap: port to which command is being issued
* @tf: ATA taskfile register set
*
- * Issues PIO/MMIO write to ATA command register, with proper
+ * Issues PIO write to ATA command register, with proper
* synchronization with interrupt handler / other threads.
*
* LOCKING:
@@ -234,6 +256,18 @@ static void ata_exec_command_mmio(struct
ata_pause(ap);
}

+
+/**
+ * ata_exec_command - issue ATA command to host controller
+ * @ap: port to which command is being issued
+ * @tf: ATA taskfile register set
+ *
+ * Issues PIO/MMIO write to ATA command register, with proper
+ * synchronization with interrupt handler / other threads.
+ *
+ * LOCKING:
+ * spin_lock_irqsave(host_set lock)
+ */
void ata_exec_command(struct ata_port *ap, struct ata_taskfile *tf)
{
if (ap->flags & ATA_FLAG_MMIO)
@@ -304,7 +338,7 @@ void ata_tf_to_host_nolock(struct ata_po
}

/**
- * ata_tf_read - input device's ATA taskfile shadow registers
+ * ata_tf_read_pio - input device's ATA taskfile shadow registers
* @ap: Port from which input is read
* @tf: ATA taskfile register set for storing input
*
@@ -367,6 +401,23 @@ static void ata_tf_read_mmio(struct ata_
}
}

+
+/**
+ * ata_tf_read - input device's ATA taskfile shadow registers
+ * @ap: Port from which input is read
+ * @tf: ATA taskfile register set for storing input
+ *
+ * Reads ATA taskfile registers for currently-selected device
+ * into @tf.
+ *
+ * Reads nsect, lbal, lbam, lbah, and device. If ATA_TFLAG_LBA48
+ * is set, also reads the hob registers.
+ *
+ * May be used as the tf_read() entry in ata_port_operations.
+ *
+ * LOCKING:
+ * Inherited from caller.
+ */
void ata_tf_read(struct ata_port *ap, struct ata_taskfile *tf)
{
if (ap->flags & ATA_FLAG_MMIO)
@@ -380,7 +431,7 @@ void ata_tf_read(struct ata_port *ap, st
* @ap: port where the device is
*
* Reads ATA taskfile status register for currently-selected device
- * and return it's value. This also clears pending interrupts
+ * and return its value. This also clears pending interrupts
* from this device
*
* LOCKING:
@@ -396,7 +447,7 @@ static u8 ata_check_status_pio(struct at
* @ap: port where the device is
*
* Reads ATA taskfile status register for currently-selected device
- * via MMIO and return it's value. This also clears pending interrupts
+ * via MMIO and return its value. This also clears pending interrupts
* from this device
*
* LOCKING:
@@ -407,6 +458,20 @@ static u8 ata_check_status_mmio(struct a
return readb((void __iomem *) ap->ioaddr.status_addr);
}

+
+/**
+ * ata_check_status - Read device status reg & clear interrupt
+ * @ap: port where the device is
+ *
+ * Reads ATA taskfile status register for currently-selected device
+ * and return its value. This also clears pending interrupts
+ * from this device
+ *
+ * May be used as the check_status() entry in ata_port_operations.
+ *
+ * LOCKING:
+ * Inherited from caller.
+ */
u8 ata_check_status(struct ata_port *ap)
{
if (ap->flags & ATA_FLAG_MMIO)
@@ -414,6 +479,20 @@ u8 ata_check_status(struct ata_port *ap)
return ata_check_status_pio(ap);
}

+
+/**
+ * ata_altstatus - Read device alternate status reg
+ * @ap: port where the device is
+ *
+ * Reads ATA taskfile alternate status register for
+ * currently-selected device and return its value.
+ *
+ * Note: may NOT be used as the check_altstatus() entry in
+ * ata_port_operations.
+ *
+ * LOCKING:
+ * Inherited from caller.
+ */
u8 ata_altstatus(struct ata_port *ap)
{
if (ap->ops->check_altstatus)
@@ -424,6 +503,20 @@ u8 ata_altstatus(struct ata_port *ap)
return inb(ap->ioaddr.altstatus_addr);
}

+
+/**
+ * ata_chk_err - Read device error reg
+ * @ap: port where the device is
+ *
+ * Reads ATA taskfile error register for
+ * currently-selected device and return its value.
+ *
+ * Note: may NOT be used as the check_err() entry in
+ * ata_port_operations.
+ *
+ * LOCKING:
+ * Inherited from caller.
+ */
u8 ata_chk_err(struct ata_port *ap)
{
if (ap->ops->check_err)
@@ -872,10 +965,24 @@ void ata_dev_id_string(u16 *id, unsigned
}
}

+
+/**
+ * ata_noop_dev_select - Select device 0/1 on ATA bus
+ * @ap: ATA channel to manipulate
+ * @device: ATA device (numbered from zero) to select
+ *
+ * This function performs no actual function.
+ *
+ * May be used as the dev_select() entry in ata_port_operations.
+ *
+ * LOCKING:
+ * caller.
+ */
void ata_noop_dev_select (struct ata_port *ap, unsigned int device)
{
}

+
/**
* ata_std_dev_select - Select device 0/1 on ATA bus
* @ap: ATA channel to manipulate
@@ -883,7 +990,9 @@ void ata_noop_dev_select (struct ata_por
*
* Use the method defined in the ATA specification to
* make either device 0, or device 1, active on the
- * ATA channel.
+ * ATA channel. Works with both PIO and MMIO.
+ *
+ * May be used as the dev_select() entry in ata_port_operations.
*
* LOCKING:
* caller.
@@ -1185,11 +1294,47 @@ err_out:
DPRINTK("EXIT, err\n");
}

+
+static inline u8 ata_dev_knobble(struct ata_port *ap)
+{
+ return ((ap->cbl == ATA_CBL_SATA) && (!ata_id_is_sata(ap->device->id)));
+}
+
+/**
+ * ata_dev_config - Run device specific handlers and check for
+ * SATA->PATA bridges
+ * @ap: Bus
+ * @i: Device
+ *
+ * LOCKING:
+ */
+
+void ata_dev_config(struct ata_port *ap, unsigned int i)
+{
+ /* limit bridge transfers to udma5, 200 sectors */
+ if (ata_dev_knobble(ap)) {
+ printk(KERN_INFO "ata%u(%u): applying bridge limits\n",
+ ap->id, ap->device->devno);
+ ap->udma_mask &= ATA_UDMA5;
+ ap->host->max_sectors = ATA_MAX_SECTORS;
+ ap->host->hostt->max_sectors = ATA_MAX_SECTORS;
+ ap->device->flags |= ATA_DFLAG_LOCK_SECTORS;
+ }
+
+ if (ap->ops->dev_config)
+ ap->ops->dev_config(ap, &ap->device[i]);
+}
+
/**
* ata_bus_probe - Reset and probe ATA bus
* @ap: Bus to probe
*
+ * Master ATA bus probing function. Initiates a hardware-dependent
+ * bus reset, then attempts to identify any devices found on
+ * the bus.
+ *
* LOCKING:
+ * PCI/etc. bus probe sem.
*
* RETURNS:
* Zero on success, non-zero on error.
@@ -1207,8 +1352,7 @@ static int ata_bus_probe(struct ata_port
ata_dev_identify(ap, i);
if (ata_dev_present(&ap->device[i])) {
found = 1;
- if (ap->ops->dev_config)
- ap->ops->dev_config(ap, &ap->device[i]);
+ ata_dev_config(ap,i);
}
}

@@ -1228,10 +1372,14 @@ err_out:
}

/**
- * ata_port_probe -
- * @ap:
+ * ata_port_probe - Mark port as enabled
+ * @ap: Port for which we indicate enablement
*
- * LOCKING:
+ * Modify @ap data structure such that the system
+ * thinks that the entire port is enabled.
+ *
+ * LOCKING: host_set lock, or some other form of
+ * serialization.
*/

void ata_port_probe(struct ata_port *ap)
@@ -1240,10 +1388,15 @@ void ata_port_probe(struct ata_port *ap)
}

/**
- * __sata_phy_reset -
- * @ap:
+ * __sata_phy_reset - Wake/reset a low-level SATA PHY
+ * @ap: SATA port associated with target SATA PHY.
+ *
+ * This function issues commands to standard SATA Sxxx
+ * PHY registers, to wake up the phy (and device), and
+ * clear any reset condition.
*
* LOCKING:
+ * PCI/etc. bus probe sem.
*
*/
void __sata_phy_reset(struct ata_port *ap)
@@ -1252,11 +1405,13 @@ void __sata_phy_reset(struct ata_port *a
unsigned long timeout = jiffies + (HZ * 5);

if (ap->flags & ATA_FLAG_SATA_RESET) {
- scr_write(ap, SCR_CONTROL, 0x301); /* issue phy wake/reset */
- scr_read(ap, SCR_STATUS); /* dummy read; flush */
- udelay(400); /* FIXME: a guess */
+ /* issue phy wake/reset */
+ scr_write_flush(ap, SCR_CONTROL, 0x301);
+ /* Couldn't find anything in SATA I/II specs, but
+ * AHCI-1.1 10.4.2 says at least 1 ms. */
+ mdelay(1);
}
- scr_write(ap, SCR_CONTROL, 0x300); /* issue phy wake/clear reset */
+ scr_write_flush(ap, SCR_CONTROL, 0x300); /* phy wake/clear reset */

/* wait for phy to become ready, if necessary */
do {
@@ -1288,10 +1443,14 @@ void __sata_phy_reset(struct ata_port *a
}

/**
- * __sata_phy_reset -
- * @ap:
+ * sata_phy_reset - Reset SATA bus.
+ * @ap: SATA port associated with target SATA PHY.
+ *
+ * This function resets the SATA bus, and then probes
+ * the bus for devices.
*
* LOCKING:
+ * PCI/etc. bus probe sem.
*
*/
void sata_phy_reset(struct ata_port *ap)
@@ -1303,10 +1462,16 @@ void sata_phy_reset(struct ata_port *ap)
}

/**
- * ata_port_disable -
- * @ap:
+ * ata_port_disable - Disable port.
+ * @ap: Port to be disabled.
*
- * LOCKING:
+ * Modify @ap data structure such that the system
+ * thinks that the entire port is disabled, and should
+ * never attempt to probe or communicate with devices
+ * on this port.
+ *
+ * LOCKING: host_set lock, or some other form of
+ * serialization.
*/

void ata_port_disable(struct ata_port *ap)
@@ -1415,7 +1580,10 @@ static void ata_host_set_dma(struct ata_
* ata_set_mode - Program timings and issue SET FEATURES - XFER
* @ap: port on which timings will be programmed
*
+ * Set ATA device disk transfer mode (PIO3, UDMA6, etc.).
+ *
* LOCKING:
+ * PCI/etc. bus probe sem.
*
*/
static void ata_set_mode(struct ata_port *ap)
@@ -1466,7 +1634,10 @@ err_out:
* @tmout_pat: impatience timeout
* @tmout: overall timeout
*
- * LOCKING:
+ * Sleep until ATA Status register bit BSY clears,
+ * or a timeout occurs.
+ *
+ * LOCKING: None.
*
*/

@@ -1552,10 +1723,14 @@ static void ata_bus_post_reset(struct at
}

/**
- * ata_bus_edd -
- * @ap:
+ * ata_bus_edd - Issue EXECUTE DEVICE DIAGNOSTIC command.
+ * @ap: Port to reset and probe
+ *
+ * Use the EXECUTE DEVICE DIAGNOSTIC command to reset and
+ * probe the bus. Not often used these days.
*
* LOCKING:
+ * PCI/etc. bus probe sem.
*
*/

@@ -1632,8 +1807,8 @@ static unsigned int ata_bus_softreset(st
* the device is ATA or ATAPI.
*
* LOCKING:
- * Inherited from caller. Some functions called by this function
- * obtain the host_set lock.
+ * PCI/etc. bus probe sem.
+ * Obtains host_set lock.
*
* SIDE EFFECTS:
* Sets ATA_FLAG_PORT_DISABLED if bus reset fails.
@@ -1746,6 +1921,7 @@ static const char * ata_dma_blacklist []
"HITACHI CDR-8335",
"HITACHI CDR-8435",
"Toshiba CD-ROM XM-6202B",
+ "TOSHIBA CD-ROM XM-1702BC",
"CD-532E-A",
"E-IDE CD-ROM CR-840",
"CD-ROM Drive/F5A",
@@ -1753,7 +1929,6 @@ static const char * ata_dma_blacklist []
"SAMSUNG CD-ROM SC-148C",
"SAMSUNG CD-ROM SC",
"SanDisk SDP3B-64",
- "SAMSUNG CD-ROM SN-124",
"ATAPI CD-ROM DRIVE 40X MAXIMUM",
"_NEC DV5800A",
};
@@ -1875,7 +2050,11 @@ static int fgb(u32 bitmap)
* @xfer_mode_out: (output) SET FEATURES - XFER MODE code
* @xfer_shift_out: (output) bit shift that selects this mode
*
+ * Based on host and device capabilities, determine the
+ * maximum transfer mode that is amenable to all.
+ *
* LOCKING:
+ * PCI/etc. bus probe sem.
*
* RETURNS:
* Zero on success, negative on error.
@@ -1908,7 +2087,11 @@ static int ata_choose_xfer_mode(struct a
* @ap: Port associated with device @dev
* @dev: Device to which command will be sent
*
+ * Issue SET FEATURES - XFER MODE command to device @dev
+ * on port @ap.
+ *
* LOCKING:
+ * PCI/etc. bus probe sem.
*/

static void ata_dev_set_xfermode(struct ata_port *ap, struct ata_device *dev)
@@ -1946,10 +2129,13 @@ static void ata_dev_set_xfermode(struct
}

/**
- * ata_sg_clean -
- * @qc:
+ * ata_sg_clean - Unmap DMA memory associated with command
+ * @qc: Command containing DMA memory to be released
+ *
+ * Unmap all mapped DMA memory associated with this command.
*
* LOCKING:
+ * spin_lock_irqsave(host_set lock)
*/

static void ata_sg_clean(struct ata_queued_cmd *qc)
@@ -1980,7 +2166,11 @@ static void ata_sg_clean(struct ata_queu
* ata_fill_sg - Fill PCI IDE PRD table
* @qc: Metadata associated with taskfile to be transferred
*
+ * Fill PCI IDE PRD (scatter-gather) table with segments
+ * associated with the current disk command.
+ *
* LOCKING:
+ * spin_lock_irqsave(host_set lock)
*
*/
static void ata_fill_sg(struct ata_queued_cmd *qc)
@@ -2027,7 +2217,13 @@ static void ata_fill_sg(struct ata_queue
* ata_check_atapi_dma - Check whether ATAPI DMA can be supported
* @qc: Metadata associated with taskfile to check
*
+ * Allow low-level driver to filter ATA PACKET commands, returning
+ * a status indicating whether or not it is OK to use DMA for the
+ * supplied PACKET command.
+ *
* LOCKING:
+ * spin_lock_irqsave(host_set lock)
+ *
* RETURNS: 0 when ATAPI DMA can be used
* nonzero otherwise
*/
@@ -2045,6 +2241,8 @@ int ata_check_atapi_dma(struct ata_queue
* ata_qc_prep - Prepare taskfile for submission
* @qc: Metadata associated with taskfile to be prepared
*
+ * Prepare ATA taskfile for submission.
+ *
* LOCKING:
* spin_lock_irqsave(host_set lock)
*/
@@ -2056,6 +2254,32 @@ void ata_qc_prep(struct ata_queued_cmd *
ata_fill_sg(qc);
}

+/**
+ * ata_sg_init_one - Associate command with memory buffer
+ * @qc: Command to be associated
+ * @buf: Memory buffer
+ * @buflen: Length of memory buffer, in bytes.
+ *
+ * Initialize the data-related elements of queued_cmd @qc
+ * to point to a single memory buffer, @buf of byte length @buflen.
+ *
+ * LOCKING:
+ * spin_lock_irqsave(host_set lock)
+ */
+
+
+
+/**
+ * ata_sg_init_one - Prepare a one-entry scatter-gather list.
+ * @qc: Queued command
+ * @buf: transfer buffer
+ * @buflen: length of buf
+ *
+ * Builds a single-entry scatter-gather list to initiate a
+ * transfer utilizing the specified buffer.
+ *
+ * LOCKING:
+ */
void ata_sg_init_one(struct ata_queued_cmd *qc, void *buf, unsigned int buflen)
{
struct scatterlist *sg;
@@ -2070,9 +2294,35 @@ void ata_sg_init_one(struct ata_queued_c
sg = qc->sg;
sg->page = virt_to_page(buf);
sg->offset = (unsigned long) buf & ~PAGE_MASK;
- sg_dma_len(sg) = buflen;
+ sg->length = buflen;
}

+/**
+ * ata_sg_init - Associate command with scatter-gather table.
+ * @qc: Command to be associated
+ * @sg: Scatter-gather table.
+ * @n_elem: Number of elements in s/g table.
+ *
+ * Initialize the data-related elements of queued_cmd @qc
+ * to point to a scatter-gather table @sg, containing @n_elem
+ * elements.
+ *
+ * LOCKING:
+ * spin_lock_irqsave(host_set lock)
+ */
+
+
+/**
+ * ata_sg_init - Assign a scatter gather list to a queued command
+ * @qc: Queued command
+ * @sg: Scatter-gather list
+ * @n_elem: length of sg list
+ *
+ * Attaches a scatter-gather list to a queued command.
+ *
+ * LOCKING:
+ */
+
void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg,
unsigned int n_elem)
{
@@ -2082,14 +2332,16 @@ void ata_sg_init(struct ata_queued_cmd *
}

/**
- * ata_sg_setup_one -
- * @qc:
+ * ata_sg_setup_one - DMA-map the memory buffer associated with a command.
+ * @qc: Command with memory buffer to be mapped.
+ *
+ * DMA-map the memory buffer associated with queued_cmd @qc.
*
* LOCKING:
* spin_lock_irqsave(host_set lock)
*
* RETURNS:
- *
+ * Zero on success, negative on error.
*/

static int ata_sg_setup_one(struct ata_queued_cmd *qc)
@@ -2100,11 +2352,12 @@ static int ata_sg_setup_one(struct ata_q
dma_addr_t dma_address;

dma_address = dma_map_single(ap->host_set->dev, qc->buf_virt,
- sg_dma_len(sg), dir);
+ sg->length, dir);
if (dma_mapping_error(dma_address))
return -1;

sg_dma_address(sg) = dma_address;
+ sg_dma_len(sg) = sg->length;

DPRINTK("mapped buffer of %d bytes for %s\n", sg_dma_len(sg),
qc->tf.flags & ATA_TFLAG_WRITE ? "write" : "read");
@@ -2113,13 +2366,16 @@ static int ata_sg_setup_one(struct ata_q
}

/**
- * ata_sg_setup -
- * @qc:
+ * ata_sg_setup - DMA-map the scatter-gather table associated with a command.
+ * @qc: Command with scatter-gather table to be mapped.
+ *
+ * DMA-map the scatter-gather table associated with queued_cmd @qc.
*
* LOCKING:
* spin_lock_irqsave(host_set lock)
*
* RETURNS:
+ * Zero on success, negative on error.
*
*/

@@ -2149,6 +2405,7 @@ static int ata_sg_setup(struct ata_queue
* @ap:
*
* LOCKING:
+ * None. (executing in kernel thread context)
*
* RETURNS:
*
@@ -2196,6 +2453,7 @@ static unsigned long ata_pio_poll(struct
* @ap:
*
* LOCKING:
+ * None. (executing in kernel thread context)
*/

static void ata_pio_complete (struct ata_port *ap)
@@ -2238,6 +2496,18 @@ static void ata_pio_complete (struct ata
ata_qc_complete(qc, drv_stat);
}

+
+/**
+ * swap_buf_le16 -
+ * @buf: Buffer to swap
+ * @buf_words: Number of 16-bit words in buffer.
+ *
+ * Swap halves of 16-bit words if needed to convert from
+ * little-endian byte order to native cpu byte order, or
+ * vice-versa.
+ *
+ * LOCKING:
+ */
void swap_buf_le16(u16 *buf, unsigned int buf_words)
{
#ifdef __BIG_ENDIAN
@@ -2309,7 +2579,7 @@ static void ata_pio_sector(struct ata_qu
qc->cursect++;
qc->cursg_ofs++;

- if ((qc->cursg_ofs * ATA_SECT_SIZE) == sg_dma_len(&sg[qc->cursg])) {
+ if ((qc->cursg_ofs * ATA_SECT_SIZE) == (&sg[qc->cursg])->length) {
qc->cursg++;
qc->cursg_ofs = 0;
}
@@ -2338,7 +2608,6 @@ static void __atapi_pio_bytes(struct ata
next_sg:
sg = &qc->sg[qc->cursg];

-next_page:
page = sg->page;
offset = sg->offset + qc->cursg_ofs;

@@ -2346,7 +2615,8 @@ next_page:
page = nth_page(page, (offset >> PAGE_SHIFT));
offset %= PAGE_SIZE;

- count = min(sg_dma_len(sg) - qc->cursg_ofs, bytes);
+ /* don't overrun current sg */
+ count = min(sg->length - qc->cursg_ofs, bytes);

/* don't cross page boundaries */
count = min(count, (unsigned int)PAGE_SIZE - offset);
@@ -2357,7 +2627,7 @@ next_page:
qc->curbytes += count;
qc->cursg_ofs += count;

- if (qc->cursg_ofs == sg_dma_len(sg)) {
+ if (qc->cursg_ofs == sg->length) {
qc->cursg++;
qc->cursg_ofs = 0;
}
@@ -2370,8 +2640,6 @@ next_page:
kunmap(page);

if (bytes) {
- if (qc->cursg_ofs < sg_dma_len(sg))
- goto next_page;
goto next_sg;
}
}
@@ -2413,6 +2681,7 @@ err_out:
* @ap:
*
* LOCKING:
+ * None. (executing in kernel thread context)
*/

static void ata_pio_block(struct ata_port *ap)
@@ -2539,7 +2808,7 @@ static void atapi_request_sense(struct a
ata_sg_init_one(qc, cmd->sense_buffer, sizeof(cmd->sense_buffer));
qc->dma_dir = DMA_FROM_DEVICE;

- memset(&qc->cdb, 0, sizeof(ap->cdb_len));
+ memset(&qc->cdb, 0, ap->cdb_len);
qc->cdb[0] = REQUEST_SENSE;
qc->cdb[4] = SCSI_SENSE_BUFFERSIZE;

@@ -2582,6 +2851,7 @@ static void atapi_request_sense(struct a
* transaction completed successfully.
*
* LOCKING:
+ * Inherited from SCSI layer (none, can sleep)
*/

static void ata_qc_timeout(struct ata_queued_cmd *qc)
@@ -2691,6 +2961,7 @@ out:
* @dev: Device from whom we request an available command structure
*
* LOCKING:
+ * None.
*/

static struct ata_queued_cmd *ata_qc_new(struct ata_port *ap)
@@ -2716,6 +2987,7 @@ static struct ata_queued_cmd *ata_qc_new
* @dev: Device from whom we request an available command structure
*
* LOCKING:
+ * None.
*/

struct ata_queued_cmd *ata_qc_new_init(struct ata_port *ap,
@@ -2780,6 +3052,7 @@ static void __ata_qc_complete(struct ata
* in case something prevents using it.
*
* LOCKING:
+ * spin_lock_irqsave(host_set lock)
*
*/
void ata_qc_free(struct ata_queued_cmd *qc)
@@ -2793,9 +3066,13 @@ void ata_qc_free(struct ata_queued_cmd *
/**
* ata_qc_complete - Complete an active ATA command
* @qc: Command to complete
- * @drv_stat: ATA status register contents
+ * @drv_stat: ATA Status register contents
+ *
+ * Indicate to the mid and upper layers that an ATA
+ * command has completed, with either an ok or not-ok status.
*
* LOCKING:
+ * spin_lock_irqsave(host_set lock)
*
*/

@@ -2811,6 +3088,7 @@ void ata_qc_complete(struct ata_queued_c

/* call completion callback */
rc = qc->complete_fn(qc, drv_stat);
+ qc->flags &= ~ATA_QCFLAG_ACTIVE;

/* if callback indicates not to complete command (non-zero),
* return immediately
@@ -2839,7 +3117,7 @@ static inline int ata_should_dma_map(str
return 1;

/* fall through */
-
+
default:
return 0;
}
@@ -2890,6 +3168,7 @@ err_out:
return -1;
}

+
/**
* ata_qc_issue_prot - issue taskfile to device in proto-dependent manner
* @qc: command to issue to device
@@ -2899,6 +3178,8 @@ err_out:
* classes called "protocols", and issuing each type of protocol
* is slightly different.
*
+ * May be used as the qc_issue() entry in ata_port_operations.
+ *
* LOCKING:
* spin_lock_irqsave(host_set lock)
*
@@ -2956,7 +3237,7 @@ int ata_qc_issue_prot(struct ata_queued_
}

/**
- * ata_bmdma_setup - Set up PCI IDE BMDMA transaction
+ * ata_bmdma_setup_mmio - Set up PCI IDE BMDMA transaction
* @qc: Info associated with this ATA transaction.
*
* LOCKING:
@@ -3063,6 +3344,18 @@ static void ata_bmdma_start_pio (struct
ap->ioaddr.bmdma_addr + ATA_DMA_CMD);
}

+
+/**
+ * ata_bmdma_start - Start a PCI IDE BMDMA transaction
+ * @qc: Info associated with this ATA transaction.
+ *
+ * Writes the ATA_DMA_START flag to the DMA command register.
+ *
+ * May be used as the bmdma_start() entry in ata_port_operations.
+ *
+ * LOCKING:
+ * spin_lock_irqsave(host_set lock)
+ */
void ata_bmdma_start(struct ata_queued_cmd *qc)
{
if (qc->ap->flags & ATA_FLAG_MMIO)
@@ -3071,6 +3364,20 @@ void ata_bmdma_start(struct ata_queued_c
ata_bmdma_start_pio(qc);
}

+
+/**
+ * ata_bmdma_setup - Set up PCI IDE BMDMA transaction
+ * @qc: Info associated with this ATA transaction.
+ *
+ * Writes address of PRD table to device's PRD Table Address
+ * register, sets the DMA control register, and calls
+ * ops->exec_command() to start the transfer.
+ *
+ * May be used as the bmdma_setup() entry in ata_port_operations.
+ *
+ * LOCKING:
+ * spin_lock_irqsave(host_set lock)
+ */
void ata_bmdma_setup(struct ata_queued_cmd *qc)
{
if (qc->ap->flags & ATA_FLAG_MMIO)
@@ -3079,6 +3386,19 @@ void ata_bmdma_setup(struct ata_queued_c
ata_bmdma_setup_pio(qc);
}

+
+/**
+ * ata_bmdma_irq_clear - Clear PCI IDE BMDMA interrupt.
+ * @ap: Port associated with this ATA transaction.
+ *
+ * Clear interrupt and error flags in DMA status register.
+ *
+ * May be used as the irq_clear() entry in ata_port_operations.
+ *
+ * LOCKING:
+ * spin_lock_irqsave(host_set lock)
+ */
+
void ata_bmdma_irq_clear(struct ata_port *ap)
{
if (ap->flags & ATA_FLAG_MMIO) {
@@ -3091,6 +3411,19 @@ void ata_bmdma_irq_clear(struct ata_port

}

+
+/**
+ * ata_bmdma_status - Read PCI IDE BMDMA status
+ * @ap: Port associated with this ATA transaction.
+ *
+ * Read and return BMDMA status register.
+ *
+ * May be used as the bmdma_status() entry in ata_port_operations.
+ *
+ * LOCKING:
+ * spin_lock_irqsave(host_set lock)
+ */
+
u8 ata_bmdma_status(struct ata_port *ap)
{
u8 host_stat;
@@ -3102,6 +3435,19 @@ u8 ata_bmdma_status(struct ata_port *ap)
return host_stat;
}

+
+/**
+ * ata_bmdma_stop - Stop PCI IDE BMDMA transfer
+ * @ap: Port associated with this ATA transaction.
+ *
+ * Clears the ATA_DMA_START flag in the dma control register
+ *
+ * May be used as the bmdma_stop() entry in ata_port_operations.
+ *
+ * LOCKING:
+ * spin_lock_irqsave(host_set lock)
+ */
+
void ata_bmdma_stop(struct ata_port *ap)
{
if (ap->flags & ATA_FLAG_MMIO) {
@@ -3201,13 +3547,18 @@ idle_irq:

/**
* ata_interrupt - Default ATA host interrupt handler
- * @irq: irq line
- * @dev_instance: pointer to our host information structure
+ * @irq: irq line (unused)
+ * @dev_instance: pointer to our ata_host_set information structure
* @regs: unused
*
+ * Default interrupt handler for PCI IDE devices. Calls
+ * ata_host_intr() for each port that is not disabled.
+ *
* LOCKING:
+ * Obtains host_set lock during operation.
*
* RETURNS:
+ * IRQ_NONE or IRQ_HANDLED.
*
*/

@@ -3229,7 +3580,8 @@ irqreturn_t ata_interrupt (int irq, void
struct ata_queued_cmd *qc;

qc = ata_qc_from_tag(ap, ap->active_tag);
- if (qc && (!(qc->tf.ctl & ATA_NIEN)))
+ if (qc && (!(qc->tf.ctl & ATA_NIEN)) &&
+ (qc->flags & ATA_QCFLAG_ACTIVE))
handled |= ata_host_intr(ap, qc);
}
}
@@ -3299,6 +3651,19 @@ err_out:
ata_qc_complete(qc, ATA_ERR);
}

+
+/**
+ * ata_port_start - Set port up for dma.
+ * @ap: Port to initialize
+ *
+ * Called just after data structures for each port are
+ * initialized. Allocates space for PRD table.
+ *
+ * May be used as the port_start() entry in ata_port_operations.
+ *
+ * LOCKING:
+ */
+
int ata_port_start (struct ata_port *ap)
{
struct device *dev = ap->host_set->dev;
@@ -3312,6 +3677,18 @@ int ata_port_start (struct ata_port *ap)
return 0;
}

+
+/**
+ * ata_port_stop - Undo ata_port_start()
+ * @ap: Port to shut down
+ *
+ * Frees the PRD table.
+ *
+ * May be used as the port_stop() entry in ata_port_operations.
+ *
+ * LOCKING:
+ */
+
void ata_port_stop (struct ata_port *ap)
{
struct device *dev = ap->host_set->dev;
@@ -3319,6 +3696,13 @@ void ata_port_stop (struct ata_port *ap)
dma_free_coherent(dev, ATA_PRD_TBL_SZ, ap->prd, ap->prd_dma);
}

+void ata_host_stop (struct ata_host_set *host_set)
+{
+ if (host_set->mmio_base)
+ iounmap(host_set->mmio_base);
+}
+
+
/**
* ata_host_remove - Unregister SCSI host structure with upper layers
* @ap: Port to unregister
@@ -3347,7 +3731,11 @@ static void ata_host_remove(struct ata_p
* @ent: Probe information provided by low-level driver
* @port_no: Port number associated with this ata_port
*
+ * Initialize a new ata_port structure, and its associated
+ * scsi_host.
+ *
* LOCKING:
+ * Inherited from caller.
*
*/

@@ -3401,9 +3789,13 @@ static void ata_host_init(struct ata_por
* @host_set: Collections of ports to which we add
* @port_no: Port number associated with this host
*
+ * Attach low-level ATA driver to system.
+ *
* LOCKING:
+ * PCI/etc. bus probe sem.
*
* RETURNS:
+ * New ata_port on success, for NULL on error.
*
*/

@@ -3436,12 +3828,22 @@ err_out:
}

/**
- * ata_device_add -
- * @ent:
+ * ata_device_add - Register hardware device with ATA and SCSI layers
+ * @ent: Probe information describing hardware device to be registered
+ *
+ * This function processes the information provided in the probe
+ * information struct @ent, allocates the necessary ATA and SCSI
+ * host information structures, initializes them, and registers
+ * everything with requisite kernel subsystems.
+ *
+ * This function requests irqs, probes the ATA bus, and probes
+ * the SCSI bus.
*
* LOCKING:
+ * PCI/etc. bus probe sem.
*
* RETURNS:
+ * Number of ports registered. Zero on error (no ports registered).
*
*/

@@ -3612,7 +4014,15 @@ int ata_scsi_release(struct Scsi_Host *h
/**
* ata_std_ports - initialize ioaddr with standard port offsets.
* @ioaddr: IO address structure to be initialized
+ *
+ * Utility function which initializes data_addr, error_addr,
+ * feature_addr, nsect_addr, lbal_addr, lbam_addr, lbah_addr,
+ * device_addr, status_addr, and command_addr to standard offsets
+ * relative to cmd_addr.
+ *
+ * Does not set ctl_addr, altstatus_addr, bmdma_addr, or scr_addr.
*/
+
void ata_std_ports(struct ata_ioports *ioaddr)
{
ioaddr->data_addr = ioaddr->cmd_addr + ATA_REG_DATA;
@@ -3654,6 +4064,20 @@ ata_probe_ent_alloc(struct device *dev,
return probe_ent;
}

+
+
+/**
+ * ata_pci_init_native_mode - Initialize native-mode driver
+ * @pdev: pci device to be initialized
+ * @port: array[2] of pointers to port info structures.
+ *
+ * Utility function which allocates and initializes an
+ * ata_probe_ent structure for a standard dual-port
+ * PIO-based IDE controller. The returned ata_probe_ent
+ * structure can be passed to ata_device_add(). The returned
+ * ata_probe_ent structure should then be freed with kfree().
+ */
+
#ifdef CONFIG_PCI
struct ata_probe_ent *
ata_pci_init_native_mode(struct pci_dev *pdev, struct ata_port_info **port)
@@ -3735,10 +4159,19 @@ ata_pci_init_legacy_mode(struct pci_dev
* @port_info: Information from low-level host driver
* @n_ports: Number of ports attached to host controller
*
+ * This is a helper function which can be called from a driver's
+ * xxx_init_one() probe function if the hardware uses traditional
+ * IDE taskfile registers.
+ *
+ * This function calls pci_enable_device(), reserves its register
+ * regions, sets the dma mask, enables bus master mode, and calls
+ * ata_device_add()
+ *
* LOCKING:
* Inherited from PCI layer (may sleep).
*
* RETURNS:
+ * Zero on success, negative on errno-based value on error.
*
*/

@@ -3882,10 +4315,6 @@ void ata_pci_remove_one (struct pci_dev
/* FIXME: handle 'rc' failure? */

free_irq(host_set->irq, host_set);
- if (host_set->ops->host_stop)
- host_set->ops->host_stop(host_set);
- if (host_set->mmio_base)
- iounmap(host_set->mmio_base);

for (i = 0; i < host_set->n_ports; i++) {
ap = host_set->ports[i];
@@ -3900,6 +4329,9 @@ void ata_pci_remove_one (struct pci_dev
}
}

+ if (host_set->ops->host_stop)
+ host_set->ops->host_stop(host_set);
+
kfree(host_set);

pci_release_regions(pdev);
@@ -3958,15 +4390,6 @@ int pci_test_config_bits(struct pci_dev
#endif /* CONFIG_PCI */

-/**
- * ata_init -
- *
- * LOCKING:
- *
- * RETURNS:
- *
- */
-
static int __init ata_init(void)
{
printk(KERN_DEBUG "libata version " DRV_VERSION " loaded.\n");
@@ -4007,6 +4430,7 @@ EXPORT_SYMBOL_GPL(ata_chk_err);
EXPORT_SYMBOL_GPL(ata_exec_command);
EXPORT_SYMBOL_GPL(ata_port_start);
EXPORT_SYMBOL_GPL(ata_port_stop);
+EXPORT_SYMBOL_GPL(ata_host_stop);
EXPORT_SYMBOL_GPL(ata_interrupt);
EXPORT_SYMBOL_GPL(ata_qc_prep);
EXPORT_SYMBOL_GPL(ata_bmdma_setup);
@@ -4029,6 +4453,7 @@ EXPORT_SYMBOL_GPL(ata_scsi_release);
EXPORT_SYMBOL_GPL(ata_host_intr);
EXPORT_SYMBOL_GPL(ata_dev_classify);
EXPORT_SYMBOL_GPL(ata_dev_id_string);
+EXPORT_SYMBOL_GPL(ata_dev_config);
EXPORT_SYMBOL_GPL(ata_scsi_simulate);

#ifdef CONFIG_PCI
diff --git a/drivers/scsi/libata-scsi.c b/drivers/scsi/libata-scsi.c
--- a/drivers/scsi/libata-scsi.c
+++ b/drivers/scsi/libata-scsi.c
@@ -906,7 +906,7 @@ unsigned int ata_scsiop_inq_83(struct at
}

/**
- * ata_scsiop_noop -
+ * ata_scsiop_noop - Command handler that simply returns success.
* @args: device IDENTIFY data / SCSI command of interest.
* @rbuf: Response buffer, to which simulated SCSI cmd output is sent.
* @buflen: Response buffer length.
@@ -1135,8 +1135,12 @@ unsigned int ata_scsiop_read_cap(struct
n_sectors = ata_id_u32(args->id, 60);
n_sectors--; /* ATA TotalUserSectors - 1 */

- tmp = n_sectors; /* note: truncates, if lba48 */
if (args->cmd->cmnd[0] == READ_CAPACITY) {
+ if( n_sectors >= 0xffffffffULL )
+ tmp = 0xffffffff ; /* Return max count on overflow */
+ else
+ tmp = n_sectors ;
+
/* sector count, 32-bit */
rbuf[0] = tmp >> (8 * 3);
rbuf[1] = tmp >> (8 * 2);
@@ -1150,10 +1154,12 @@ unsigned int ata_scsiop_read_cap(struct

} else {
/* sector count, 64-bit */
- rbuf[2] = n_sectors >> (8 * 7);
- rbuf[3] = n_sectors >> (8 * 6);
- rbuf[4] = n_sectors >> (8 * 5);
- rbuf[5] = n_sectors >> (8 * 4);
+ tmp = n_sectors >> (8 * 4);
+ rbuf[2] = tmp >> (8 * 3);
+ rbuf[3] = tmp >> (8 * 2);
+ rbuf[4] = tmp >> (8 * 1);
+ rbuf[5] = tmp;
+ tmp = n_sectors;
rbuf[6] = tmp >> (8 * 3);
rbuf[7] = tmp >> (8 * 2);
rbuf[8] = tmp >> (8 * 1);
diff --git a/drivers/scsi/libata.h b/drivers/scsi/libata.h
--- a/drivers/scsi/libata.h
+++ b/drivers/scsi/libata.h
@@ -26,7 +26,7 @@
#define __LIBATA_H__

#define DRV_NAME "libata"
-#define DRV_VERSION "1.10" /* must be exactly four chars */
+#define DRV_VERSION "1.11" /* must be exactly four chars */

struct ata_scsi_args {
u16 *id;
diff --git a/drivers/scsi/sata_nv.c b/drivers/scsi/sata_nv.c
--- a/drivers/scsi/sata_nv.c
+++ b/drivers/scsi/sata_nv.c
@@ -329,6 +329,8 @@ static void nv_host_stop (struct ata_hos
host->host_desc->disable_hotplug(host_set);

kfree(host);
+
+ ata_host_stop(host_set);
}

static int nv_init_one (struct pci_dev *pdev, const struct pci_device_id *ent)
diff --git a/drivers/scsi/sata_promise.c b/drivers/scsi/sata_promise.c
--- a/drivers/scsi/sata_promise.c
+++ b/drivers/scsi/sata_promise.c
@@ -42,6 +42,7 @@
#define DRV_NAME "sata_promise"
#define DRV_VERSION "1.01"

+
enum {
PDC_PKT_SUBMIT = 0x40, /* Command packet pointer addr */
PDC_INT_SEQMASK = 0x40, /* Mask of asserted SEQ INTs */
@@ -58,6 +59,7 @@ enum {

board_2037x = 0, /* FastTrak S150 TX2plus */
board_20319 = 1, /* FastTrak S150 TX4 */
+ board_20619 = 2, /* FastTrak TX4000 */

PDC_HAS_PATA = (1 << 1), /* PDC20375 has PATA */

@@ -121,6 +123,7 @@ static struct ata_port_operations pdc_at
.scr_write = pdc_sata_scr_write,
.port_start = pdc_port_start,
.port_stop = pdc_port_stop,
+ .host_stop = ata_host_stop,
};

static struct ata_port_info pdc_port_info[] = {
@@ -145,11 +148,24 @@ static struct ata_port_info pdc_port_inf
.udma_mask = 0x7f, /* udma0-6 ; FIXME */
.port_ops = &pdc_ata_ops,
},
+
+ /* board_20619 */
+ {
+ .sht = &pdc_ata_sht,
+ .host_flags = ATA_FLAG_NO_LEGACY | ATA_FLAG_SRST |
+ ATA_FLAG_MMIO | ATA_FLAG_SLAVE_POSS,
+ .pio_mask = 0x1f, /* pio0-4 */
+ .mwdma_mask = 0x07, /* mwdma0-2 */
+ .udma_mask = 0x7f, /* udma0-6 ; FIXME */
+ .port_ops = &pdc_ata_ops,
+ },
};

static struct pci_device_id pdc_ata_pci_tbl[] = {
{ PCI_VENDOR_ID_PROMISE, 0x3371, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
board_2037x },
+ { PCI_VENDOR_ID_PROMISE, 0x3571, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
+ board_2037x },
{ PCI_VENDOR_ID_PROMISE, 0x3373, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
board_2037x },
{ PCI_VENDOR_ID_PROMISE, 0x3375, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
@@ -168,6 +184,9 @@ static struct pci_device_id pdc_ata_pci_
{ PCI_VENDOR_ID_PROMISE, 0x3d18, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
board_20319 },

+ { PCI_VENDOR_ID_PROMISE, 0x6629, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
+ board_20619 },
+
{ } /* terminate list */
};

@@ -629,6 +648,15 @@ static int pdc_ata_init_one (struct pci_
case board_2037x:
probe_ent->n_ports = 2;
break;
+ case board_20619:
+ probe_ent->n_ports = 4;
+
+ pdc_ata_setup_port(&probe_ent->port[2], base + 0x300);
+ pdc_ata_setup_port(&probe_ent->port[3], base + 0x380);
+
+ probe_ent->port[2].scr_addr = base + 0x600;
+ probe_ent->port[3].scr_addr = base + 0x700;
+ break;
default:
BUG();
break;
@@ -684,7 +712,7 @@ static void __exit pdc_ata_exit(void)

MODULE_AUTHOR("Jeff Garzik");
-MODULE_DESCRIPTION("Promise SATA TX2/TX4 low-level driver");
+MODULE_DESCRIPTION("Promise ATA TX2/TX4/TX4000 low-level driver");
MODULE_LICENSE("GPL");
MODULE_DEVICE_TABLE(pci, pdc_ata_pci_tbl);
MODULE_VERSION(DRV_VERSION);
diff --git a/drivers/scsi/sata_qstor.c b/drivers/scsi/sata_qstor.c
--- a/drivers/scsi/sata_qstor.c
+++ b/drivers/scsi/sata_qstor.c
@@ -537,6 +537,8 @@ static void qs_host_stop(struct ata_host

writeb(0, mmio_base + QS_HCT_CTRL); /* disable host interrupts */
writeb(QS_CNFG3_GSRST, mmio_base + QS_HCF_CNFG3); /* global reset */
+
+ ata_host_stop(host_set);
}

static void qs_host_init(unsigned int chip_id, struct ata_probe_ent *pe)
diff --git a/drivers/scsi/sata_sil.c b/drivers/scsi/sata_sil.c
--- a/drivers/scsi/sata_sil.c
+++ b/drivers/scsi/sata_sil.c
@@ -82,6 +82,7 @@ static struct pci_device_id sil_pci_tbl[
{ 0x1095, 0x3114, PCI_ANY_ID, PCI_ANY_ID, 0, 0, sil_3114 },
{ 0x1002, 0x436e, PCI_ANY_ID, PCI_ANY_ID, 0, 0, sil_3112 },
{ 0x1002, 0x4379, PCI_ANY_ID, PCI_ANY_ID, 0, 0, sil_3112 },
+ { 0x1002, 0x437a, PCI_ANY_ID, PCI_ANY_ID, 0, 0, sil_3112 },
{ } /* terminate list */
};

@@ -160,6 +161,7 @@ static struct ata_port_operations sil_op
.scr_write = sil_scr_write,
.port_start = ata_port_start,
.port_stop = ata_port_stop,
+ .host_stop = ata_host_stop,
};

static struct ata_port_info sil_port_info[] = {
@@ -427,7 +429,13 @@ static int sil_init_one (struct pci_dev
writeb(cls, mmio_base + SIL_FIFO_R0);
writeb(cls, mmio_base + SIL_FIFO_W0);
writeb(cls, mmio_base + SIL_FIFO_R1);
- writeb(cls, mmio_base + SIL_FIFO_W2);
+ writeb(cls, mmio_base + SIL_FIFO_W1);
+ if (ent->driver_data == sil_3114) {
+ writeb(cls, mmio_base + SIL_FIFO_R2);
+ writeb(cls, mmio_base + SIL_FIFO_W2);
+ writeb(cls, mmio_base + SIL_FIFO_R3);
+ writeb(cls, mmio_base + SIL_FIFO_W3);
+ }
} else
printk(KERN_WARNING DRV_NAME "(%s): cache line size not set. Driver may not function\n",
pci_name(pdev));
diff --git a/drivers/scsi/sata_sis.c b/drivers/scsi/sata_sis.c
--- a/drivers/scsi/sata_sis.c
+++ b/drivers/scsi/sata_sis.c
@@ -114,6 +114,7 @@ static struct ata_port_operations sis_op
.scr_write = sis_scr_write,
.port_start = ata_port_start,
.port_stop = ata_port_stop,
+ .host_stop = ata_host_stop,
};

static struct ata_port_info sis_port_info = {
diff --git a/drivers/scsi/sata_svw.c b/drivers/scsi/sata_svw.c
--- a/drivers/scsi/sata_svw.c
+++ b/drivers/scsi/sata_svw.c
@@ -49,7 +49,7 @@
#endif /* CONFIG_PPC_OF */

#define DRV_NAME "sata_svw"
-#define DRV_VERSION "1.05"
+#define DRV_VERSION "1.06"

/* Taskfile registers offsets */
#define K2_SATA_TF_CMD_OFFSET 0x00
@@ -313,6 +313,7 @@ static struct ata_port_operations k2_sat
.scr_write = k2_sata_scr_write,
.port_start = ata_port_start,
.port_stop = ata_port_stop,
+ .host_stop = ata_host_stop,
};

static void k2_sata_setup_port(struct ata_ioports *port, unsigned long base)
@@ -343,6 +344,7 @@ static int k2_sata_init_one (struct pci_
void *mmio_base;
int pci_dev_busy = 0;
int rc;
+ int i;

if (!printed_version++)
printk(KERN_DEBUG DRV_NAME " version " DRV_VERSION "\n");
@@ -417,11 +419,11 @@ static int k2_sata_init_one (struct pci_
probe_ent->mwdma_mask = 0x7;
probe_ent->udma_mask = 0x7f;

- /* We have 4 ports per PCI function */
- k2_sata_setup_port(&probe_ent->port[0], base + 0 * K2_SATA_PORT_OFFSET);
- k2_sata_setup_port(&probe_ent->port[1], base + 1 * K2_SATA_PORT_OFFSET);
- k2_sata_setup_port(&probe_ent->port[2], base + 2 * K2_SATA_PORT_OFFSET);
- k2_sata_setup_port(&probe_ent->port[3], base + 3 * K2_SATA_PORT_OFFSET);
+ /* different controllers have different number of ports - currently 4 or 8 */
+ /* All ports are on the same function. Multi-function device is no
+ * longer available. This should not be seen in any system. */
+ for (i = 0; i < ent->driver_data; i++)
+ k2_sata_setup_port(&probe_ent->port[i], base + i * K2_SATA_PORT_OFFSET);

pci_set_master(pdev);

@@ -439,11 +441,17 @@ err_out:
return rc;
}

-
+/* 0x240 is device ID for Apple K2 device
+ * 0x241 is device ID for Serverworks Frodo4
+ * 0x242 is device ID for Serverworks Frodo8
+ * 0x24a is device ID for BCM5785 (aka HT1000) HT southbridge integrated SATA
+ * controller
+ * */
static struct pci_device_id k2_sata_pci_tbl[] = {
- { 0x1166, 0x0240, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
- { 0x1166, 0x0241, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
- { 0x1166, 0x0242, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
+ { 0x1166, 0x0240, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 4 },
+ { 0x1166, 0x0241, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 4 },
+ { 0x1166, 0x0242, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 8 },
+ { 0x1166, 0x024a, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 4 },
{ }
};

diff --git a/drivers/scsi/sata_sx4.c b/drivers/scsi/sata_sx4.c
--- a/drivers/scsi/sata_sx4.c
+++ b/drivers/scsi/sata_sx4.c
@@ -245,6 +245,8 @@ static void pdc20621_host_stop(struct at

iounmap(dimm_mmio);
kfree(hpriv);
+
+ ata_host_stop(host_set);
}

static int pdc_port_start(struct ata_port *ap)
diff --git a/drivers/scsi/sata_uli.c b/drivers/scsi/sata_uli.c
--- a/drivers/scsi/sata_uli.c
+++ b/drivers/scsi/sata_uli.c
@@ -113,6 +113,7 @@ static struct ata_port_operations uli_op

.port_start = ata_port_start,
.port_stop = ata_port_stop,
+ .host_stop = ata_host_stop,
};

static struct ata_port_info uli_port_info = {
diff --git a/drivers/scsi/sata_via.c b/drivers/scsi/sata_via.c
--- a/drivers/scsi/sata_via.c
+++ b/drivers/scsi/sata_via.c
@@ -134,6 +134,7 @@ static struct ata_port_operations svia_s

.port_start = ata_port_start,
.port_stop = ata_port_stop,
+ .host_stop = ata_host_stop,
};

static struct ata_port_info svia_port_info = {
diff --git a/drivers/scsi/sata_vsc.c b/drivers/scsi/sata_vsc.c
--- a/drivers/scsi/sata_vsc.c
+++ b/drivers/scsi/sata_vsc.c
@@ -230,6 +230,7 @@ static struct ata_port_operations vsc_sa
.scr_write = vsc_sata_scr_write,
.port_start = ata_port_start,
.port_stop = ata_port_stop,
+ .host_stop = ata_host_stop,
};

static void __devinit vsc_sata_setup_port(struct ata_ioports *port, unsigned long base)
diff --git a/include/linux/ata.h b/include/linux/ata.h
--- a/include/linux/ata.h
+++ b/include/linux/ata.h
@@ -224,6 +224,7 @@ struct ata_taskfile {
};

#define ata_id_is_ata(id) (((id)[0] & (1 << 15)) == 0)
+#define ata_id_is_sata(id) ((id)[93] == 0)
#define ata_id_rahead_enabled(id) ((id)[85] & (1 << 6))
#define ata_id_wcache_enabled(id) ((id)[85] & (1 << 5))
#define ata_id_has_flush(id) ((id)[83] & (1 << 12))
diff --git a/include/linux/libata-compat.h b/include/linux/libata-compat.h
--- a/include/linux/libata-compat.h
+++ b/include/linux/libata-compat.h
@@ -23,6 +23,9 @@ static inline struct pci_dev *to_pci_dev
return (struct pci_dev *) dev;
}

+static inline int pci_enable_msi(struct pci_dev *dev) { return -1; }
+static inline void pci_disable_msi(struct pci_dev *dev) {}
+
#define pci_set_consistent_dma_mask(pdev,mask) (0)

#define DMA_FROM_DEVICE PCI_DMA_FROMDEVICE
diff --git a/include/linux/libata.h b/include/linux/libata.h
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -411,6 +411,7 @@ extern u8 ata_chk_err(struct ata_port *a
extern void ata_exec_command(struct ata_port *ap, struct ata_taskfile *tf);
extern int ata_port_start (struct ata_port *ap);
extern void ata_port_stop (struct ata_port *ap);
+extern void ata_host_stop (struct ata_host_set *host_set);
extern irqreturn_t ata_interrupt (int irq, void *dev_instance, struct pt_regs *regs);
extern void ata_qc_prep(struct ata_queued_cmd *qc);
extern int ata_qc_issue_prot(struct ata_queued_cmd *qc);
@@ -421,6 +422,7 @@ extern void ata_sg_init(struct ata_queue
extern unsigned int ata_dev_classify(struct ata_taskfile *tf);
extern void ata_dev_id_string(u16 *id, unsigned char *s,
unsigned int ofs, unsigned int len);
+extern void ata_dev_config(struct ata_port *ap, unsigned int i);
extern void ata_bmdma_setup (struct ata_queued_cmd *qc);
extern void ata_bmdma_start (struct ata_queued_cmd *qc);
extern void ata_bmdma_stop(struct ata_port *ap);
@@ -465,12 +467,34 @@ static inline u8 ata_chk_status(struct a
return ap->ops->check_status(ap);
}

+
+/**
+ * ata_pause - Flush writes and pause 400 nanoseconds.
+ * @ap: Port to wait for.
+ *
+ * LOCKING:
+ * Inherited from caller.
+ */
+
static inline void ata_pause(struct ata_port *ap)
{
ata_altstatus(ap);
ndelay(400);
}

+
+/**
+ * ata_busy_wait - Wait for a port status register
+ * @ap: Port to wait for.
+ *
+ * Waits up to max*10 microseconds for the selected bits in the port's
+ * status register to be cleared.
+ * Returns final value of status register.
+ *
+ * LOCKING:
+ * Inherited from caller.
+ */
+
static inline u8 ata_busy_wait(struct ata_port *ap, unsigned int bits,
unsigned int max)
{
@@ -485,6 +509,18 @@ static inline u8 ata_busy_wait(struct at
return status;
}

+
+/**
+ * ata_wait_idle - Wait for a port to be idle.
+ * @ap: Port to wait for.
+ *
+ * Waits up to 10ms for port's BUSY and DRQ signals to clear.
+ * Returns final value of status register.
+ *
+ * LOCKING:
+ * Inherited from caller.
+ */
+
static inline u8 ata_wait_idle(struct ata_port *ap)
{
u8 status = ata_busy_wait(ap, ATA_BUSY | ATA_DRQ, 1000);
@@ -523,6 +559,18 @@ static inline void ata_tf_init(struct at
tf->device = ATA_DEVICE_OBS | ATA_DEV1;
}

+
+/**
+ * ata_irq_on - Enable interrupts on a port.
+ * @ap: Port on which interrupts are enabled.
+ *
+ * Enable interrupts on a legacy IDE device using MMIO or PIO,
+ * wait for idle, clear any pending interrupts.
+ *
+ * LOCKING:
+ * Inherited from caller.
+ */
+
static inline u8 ata_irq_on(struct ata_port *ap)
{
struct ata_ioports *ioaddr = &ap->ioaddr;
@@ -542,6 +590,18 @@ static inline u8 ata_irq_on(struct ata_p
return tmp;
}

+
+/**
+ * ata_irq_ack - Acknowledge a device interrupt.
+ * @ap: Port on which interrupts are enabled.
+ *
+ * Wait up to 10 ms for legacy IDE device to become idle (BUSY
+ * or BUSY+DRQ clear). Obtain dma status and port status from
+ * device. Clear the interrupt. Return port status.
+ *
+ * LOCKING:
+ */
+
static inline u8 ata_irq_ack(struct ata_port *ap, unsigned int chk_drq)
{
unsigned int bits = chk_drq ? ATA_BUSY | ATA_DRQ : ATA_BUSY;
@@ -583,6 +643,13 @@ static inline void scr_write(struct ata_
ap->ops->scr_write(ap, reg, val);
}

+static inline void scr_write_flush(struct ata_port *ap, unsigned int reg,
+ u32 val)
+{
+ ap->ops->scr_write(ap, reg, val);
+ (void) ap->ops->scr_read(ap, reg);
+}
+
static inline unsigned int sata_dev_present(struct ata_port *ap)
{
return ((scr_read(ap, SCR_STATUS) & 0xf) == 0x3) ? 1 : 0;

Next message: Christoph Lameter: "Re: Alternative to TIF_FREEZE -> a notifier in the task_struct?"
Previous message: blaisorblade: "[patch 1/2] doc: describe Kbuild pitfall"
Next in thread: Sergey Vlasov: "Re: [git patches] 2.4.x SATA update"
Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]