#include "libata.h"
-static void ata_dev_reread_id(struct ata_port *ap, struct ata_device *dev);
static unsigned int ata_dev_init_params(struct ata_port *ap,
struct ata_device *dev);
static void ata_set_mode(struct ata_port *ap);
static void ata_dev_set_xfermode(struct ata_port *ap, struct ata_device *dev);
-static unsigned int ata_get_mode_mask(const struct ata_port *ap, int shift);
-static int fgb(u32 bitmap);
-static int ata_choose_xfer_mode(const struct ata_port *ap,
- u8 *xfer_mode_out,
- unsigned int *xfer_shift_out);
+static unsigned int ata_dev_xfermask(struct ata_port *ap,
+ struct ata_device *dev);
static unsigned int ata_unique_id = 1;
static struct workqueue_struct *ata_wq;
-int atapi_enabled = 0;
+int atapi_enabled = 1;
module_param(atapi_enabled, int, 0444);
MODULE_PARM_DESC(atapi_enabled, "Enable discovery of ATAPI devices (0=off, 1=on)");
+int libata_fua = 0;
+module_param_named(fua, libata_fua, int, 0444);
+MODULE_PARM_DESC(fua, "FUA support (0=off, 1=on)");
+
MODULE_AUTHOR("Jeff Garzik");
MODULE_DESCRIPTION("Library module for ATA devices");
MODULE_LICENSE("GPL");
return -1;
}
-static const char * const xfer_mode_str[] = {
- "UDMA/16",
- "UDMA/25",
- "UDMA/33",
- "UDMA/44",
- "UDMA/66",
- "UDMA/100",
- "UDMA/133",
- "UDMA7",
- "MWDMA0",
- "MWDMA1",
- "MWDMA2",
- "PIO0",
- "PIO1",
- "PIO2",
- "PIO3",
- "PIO4",
+/**
+ * ata_pack_xfermask - Pack pio, mwdma and udma masks into xfer_mask
+ * @pio_mask: pio_mask
+ * @mwdma_mask: mwdma_mask
+ * @udma_mask: udma_mask
+ *
+ * Pack @pio_mask, @mwdma_mask and @udma_mask into a single
+ * unsigned int xfer_mask.
+ *
+ * LOCKING:
+ * None.
+ *
+ * RETURNS:
+ * Packed xfer_mask.
+ */
+static unsigned int ata_pack_xfermask(unsigned int pio_mask,
+ unsigned int mwdma_mask,
+ unsigned int udma_mask)
+{
+ return ((pio_mask << ATA_SHIFT_PIO) & ATA_MASK_PIO) |
+ ((mwdma_mask << ATA_SHIFT_MWDMA) & ATA_MASK_MWDMA) |
+ ((udma_mask << ATA_SHIFT_UDMA) & ATA_MASK_UDMA);
+}
+
+static const struct ata_xfer_ent {
+ unsigned int shift, bits;
+ u8 base;
+} ata_xfer_tbl[] = {
+ { ATA_SHIFT_PIO, ATA_BITS_PIO, XFER_PIO_0 },
+ { ATA_SHIFT_MWDMA, ATA_BITS_MWDMA, XFER_MW_DMA_0 },
+ { ATA_SHIFT_UDMA, ATA_BITS_UDMA, XFER_UDMA_0 },
+ { -1, },
};
/**
- * ata_udma_string - convert UDMA bit offset to string
- * @mask: mask of bits supported; only highest bit counts.
+ * ata_xfer_mask2mode - Find matching XFER_* for the given xfer_mask
+ * @xfer_mask: xfer_mask of interest
*
- * Determine string which represents the highest speed
- * (highest bit in @udma_mask).
+ * Return matching XFER_* value for @xfer_mask. Only the highest
+ * bit of @xfer_mask is considered.
*
* LOCKING:
* None.
*
* RETURNS:
- * Constant C string representing highest speed listed in
- * @udma_mask, or the constant C string "<n/a>".
+ * Matching XFER_* value, 0 if no match found.
*/
+static u8 ata_xfer_mask2mode(unsigned int xfer_mask)
+{
+ int highbit = fls(xfer_mask) - 1;
+ const struct ata_xfer_ent *ent;
-static const char *ata_mode_string(unsigned int mask)
+ for (ent = ata_xfer_tbl; ent->shift >= 0; ent++)
+ if (highbit >= ent->shift && highbit < ent->shift + ent->bits)
+ return ent->base + highbit - ent->shift;
+ return 0;
+}
+
+/**
+ * ata_xfer_mode2mask - Find matching xfer_mask for XFER_*
+ * @xfer_mode: XFER_* of interest
+ *
+ * Return matching xfer_mask for @xfer_mode.
+ *
+ * LOCKING:
+ * None.
+ *
+ * RETURNS:
+ * Matching xfer_mask, 0 if no match found.
+ */
+static unsigned int ata_xfer_mode2mask(u8 xfer_mode)
{
- int i;
+ const struct ata_xfer_ent *ent;
- for (i = 7; i >= 0; i--)
- if (mask & (1 << i))
- goto out;
- for (i = ATA_SHIFT_MWDMA + 2; i >= ATA_SHIFT_MWDMA; i--)
- if (mask & (1 << i))
- goto out;
- for (i = ATA_SHIFT_PIO + 4; i >= ATA_SHIFT_PIO; i--)
- if (mask & (1 << i))
- goto out;
+ for (ent = ata_xfer_tbl; ent->shift >= 0; ent++)
+ if (xfer_mode >= ent->base && xfer_mode < ent->base + ent->bits)
+ return 1 << (ent->shift + xfer_mode - ent->base);
+ return 0;
+}
- return "<n/a>";
+/**
+ * ata_xfer_mode2shift - Find matching xfer_shift for XFER_*
+ * @xfer_mode: XFER_* of interest
+ *
+ * Return matching xfer_shift for @xfer_mode.
+ *
+ * LOCKING:
+ * None.
+ *
+ * RETURNS:
+ * Matching xfer_shift, -1 if no match found.
+ */
+static int ata_xfer_mode2shift(unsigned int xfer_mode)
+{
+ const struct ata_xfer_ent *ent;
-out:
- return xfer_mode_str[i];
+ for (ent = ata_xfer_tbl; ent->shift >= 0; ent++)
+ if (xfer_mode >= ent->base && xfer_mode < ent->base + ent->bits)
+ return ent->shift;
+ return -1;
+}
+
+/**
+ * ata_mode_string - convert xfer_mask to string
+ * @xfer_mask: mask of bits supported; only highest bit counts.
+ *
+ * Determine string which represents the highest speed
+ * (highest bit in @modemask).
+ *
+ * LOCKING:
+ * None.
+ *
+ * RETURNS:
+ * Constant C string representing highest speed listed in
+ * @mode_mask, or the constant C string "<n/a>".
+ */
+static const char *ata_mode_string(unsigned int xfer_mask)
+{
+ static const char * const xfer_mode_str[] = {
+ "PIO0",
+ "PIO1",
+ "PIO2",
+ "PIO3",
+ "PIO4",
+ "MWDMA0",
+ "MWDMA1",
+ "MWDMA2",
+ "UDMA/16",
+ "UDMA/25",
+ "UDMA/33",
+ "UDMA/44",
+ "UDMA/66",
+ "UDMA/100",
+ "UDMA/133",
+ "UDMA7",
+ };
+ int highbit;
+
+ highbit = fls(xfer_mask) - 1;
+ if (highbit >= 0 && highbit < ARRAY_SIZE(xfer_mode_str))
+ return xfer_mode_str[highbit];
+ return "<n/a>";
}
/**
id[93]);
}
-/*
- * Compute the PIO modes available for this device. This is not as
- * trivial as it seems if we must consider early devices correctly.
+/**
+ * ata_id_xfermask - Compute xfermask from the given IDENTIFY data
+ * @id: IDENTIFY data to compute xfer mask from
*
- * FIXME: pre IDE drive timing (do we care ?).
+ * Compute the xfermask for this device. This is not as trivial
+ * as it seems if we must consider early devices correctly.
+ *
+ * FIXME: pre IDE drive timing (do we care ?).
+ *
+ * LOCKING:
+ * None.
+ *
+ * RETURNS:
+ * Computed xfermask
*/
-
-static unsigned int ata_pio_modes(const struct ata_device *adev)
+static unsigned int ata_id_xfermask(const u16 *id)
{
- u16 modes;
+ unsigned int pio_mask, mwdma_mask, udma_mask;
/* Usual case. Word 53 indicates word 64 is valid */
- if (adev->id[ATA_ID_FIELD_VALID] & (1 << 1)) {
- modes = adev->id[ATA_ID_PIO_MODES] & 0x03;
- modes <<= 3;
- modes |= 0x7;
- return modes;
+ if (id[ATA_ID_FIELD_VALID] & (1 << 1)) {
+ pio_mask = id[ATA_ID_PIO_MODES] & 0x03;
+ pio_mask <<= 3;
+ pio_mask |= 0x7;
+ } else {
+ /* If word 64 isn't valid then Word 51 high byte holds
+ * the PIO timing number for the maximum. Turn it into
+ * a mask.
+ */
+ pio_mask = (2 << (id[ATA_ID_OLD_PIO_MODES] & 0xFF)) - 1 ;
+
+ /* But wait.. there's more. Design your standards by
+ * committee and you too can get a free iordy field to
+ * process. However its the speeds not the modes that
+ * are supported... Note drivers using the timing API
+ * will get this right anyway
+ */
}
- /* If word 64 isn't valid then Word 51 high byte holds the PIO timing
- number for the maximum. Turn it into a mask and return it */
- modes = (2 << ((adev->id[ATA_ID_OLD_PIO_MODES] >> 8) & 0xFF)) - 1 ;
- return modes;
- /* But wait.. there's more. Design your standards by committee and
- you too can get a free iordy field to process. However its the
- speeds not the modes that are supported... Note drivers using the
- timing API will get this right anyway */
-}
+ mwdma_mask = id[ATA_ID_MWDMA_MODES] & 0x07;
-static inline void
-ata_queue_packet_task(struct ata_port *ap)
-{
- if (!(ap->flags & ATA_FLAG_FLUSH_PIO_TASK))
- queue_work(ata_wq, &ap->packet_task);
-}
+ udma_mask = 0;
+ if (id[ATA_ID_FIELD_VALID] & (1 << 2))
+ udma_mask = id[ATA_ID_UDMA_MODES] & 0xff;
-static inline void
-ata_queue_pio_task(struct ata_port *ap)
-{
- if (!(ap->flags & ATA_FLAG_FLUSH_PIO_TASK))
- queue_work(ata_wq, &ap->pio_task);
+ return ata_pack_xfermask(pio_mask, mwdma_mask, udma_mask);
}
-static inline void
-ata_queue_delayed_pio_task(struct ata_port *ap, unsigned long delay)
+/**
+ * ata_port_queue_task - Queue port_task
+ * @ap: The ata_port to queue port_task for
+ *
+ * Schedule @fn(@data) for execution after @delay jiffies using
+ * port_task. There is one port_task per port and it's the
+ * user(low level driver)'s responsibility to make sure that only
+ * one task is active at any given time.
+ *
+ * libata core layer takes care of synchronization between
+ * port_task and EH. ata_port_queue_task() may be ignored for EH
+ * synchronization.
+ *
+ * LOCKING:
+ * Inherited from caller.
+ */
+void ata_port_queue_task(struct ata_port *ap, void (*fn)(void *), void *data,
+ unsigned long delay)
{
- if (!(ap->flags & ATA_FLAG_FLUSH_PIO_TASK))
- queue_delayed_work(ata_wq, &ap->pio_task, delay);
+ int rc;
+
+ if (ap->flags & ATA_FLAG_FLUSH_PORT_TASK)
+ return;
+
+ PREPARE_WORK(&ap->port_task, fn, data);
+
+ if (!delay)
+ rc = queue_work(ata_wq, &ap->port_task);
+ else
+ rc = queue_delayed_work(ata_wq, &ap->port_task, delay);
+
+ /* rc == 0 means that another user is using port task */
+ WARN_ON(rc == 0);
}
/**
- * ata_flush_pio_tasks - Flush pio_task and packet_task
- * @ap: the target ata_port
+ * ata_port_flush_task - Flush port_task
+ * @ap: The ata_port to flush port_task for
*
- * After this function completes, pio_task and packet_task are
- * guranteed not to be running or scheduled.
+ * After this function completes, port_task is guranteed not to
+ * be running or scheduled.
*
* LOCKING:
* Kernel thread context (may sleep)
*/
-
-static void ata_flush_pio_tasks(struct ata_port *ap)
+void ata_port_flush_task(struct ata_port *ap)
{
- int tmp = 0;
unsigned long flags;
DPRINTK("ENTER\n");
spin_lock_irqsave(&ap->host_set->lock, flags);
- ap->flags |= ATA_FLAG_FLUSH_PIO_TASK;
+ ap->flags |= ATA_FLAG_FLUSH_PORT_TASK;
spin_unlock_irqrestore(&ap->host_set->lock, flags);
DPRINTK("flush #1\n");
* the FLUSH flag; thus, it will never queue pio tasks again.
* Cancel and flush.
*/
- tmp |= cancel_delayed_work(&ap->pio_task);
- tmp |= cancel_delayed_work(&ap->packet_task);
- if (!tmp) {
+ if (!cancel_delayed_work(&ap->port_task)) {
DPRINTK("flush #2\n");
flush_workqueue(ata_wq);
}
spin_lock_irqsave(&ap->host_set->lock, flags);
- ap->flags &= ~ATA_FLAG_FLUSH_PIO_TASK;
+ ap->flags &= ~ATA_FLAG_FLUSH_PORT_TASK;
spin_unlock_irqrestore(&ap->host_set->lock, flags);
DPRINTK("EXIT\n");
spin_unlock_irqrestore(&ap->host_set->lock, flags);
if (!wait_for_completion_timeout(&wait, ATA_TMOUT_INTERNAL)) {
+ ata_port_flush_task(ap);
+
spin_lock_irqsave(&ap->host_set->lock, flags);
/* We're racing with irq here. If we lose, the
* @dev: target device
* @p_class: pointer to class of the target device (may be changed)
* @post_reset: is this read ID post-reset?
- * @id: buffer to fill IDENTIFY page into
+ * @p_id: read IDENTIFY page (newly allocated)
*
* Read ID data from the specified device. ATA_CMD_ID_ATA is
* performed on ATA devices and ATA_CMD_ID_ATAPI on ATAPI
* 0 on success, -errno otherwise.
*/
static int ata_dev_read_id(struct ata_port *ap, struct ata_device *dev,
- unsigned int *p_class, int post_reset, u16 *id)
+ unsigned int *p_class, int post_reset, u16 **p_id)
{
unsigned int class = *p_class;
unsigned int using_edd;
struct ata_taskfile tf;
unsigned int err_mask = 0;
+ u16 *id;
const char *reason;
int rc;
ata_dev_select(ap, dev->devno, 1, 1); /* select device 0/1 */
+ id = kmalloc(sizeof(id[0]) * ATA_ID_WORDS, GFP_KERNEL);
+ if (id == NULL) {
+ rc = -ENOMEM;
+ reason = "out of memory";
+ goto err_out;
+ }
+
retry:
ata_tf_init(ap, &tf, dev->devno);
swap_buf_le16(id, ATA_ID_WORDS);
- /* print device capabilities */
- printk(KERN_DEBUG "ata%u: dev %u cfg "
- "49:%04x 82:%04x 83:%04x 84:%04x 85:%04x 86:%04x 87:%04x 88:%04x\n",
- ap->id, dev->devno,
- id[49], id[82], id[83], id[84], id[85], id[86], id[87], id[88]);
-
/* sanity check */
if ((class == ATA_DEV_ATA) != ata_id_is_ata(id)) {
rc = -EINVAL;
}
*p_class = class;
+ *p_id = id;
return 0;
err_out:
return rc;
}
+static inline u8 ata_dev_knobble(const struct ata_port *ap,
+ struct ata_device *dev)
+{
+ return ((ap->cbl == ATA_CBL_SATA) && (!ata_id_is_sata(dev->id)));
+}
+
/**
- * ata_dev_identify - obtain IDENTIFY x DEVICE page
- * @ap: port on which device we wish to probe resides
- * @device: device bus address, starting at zero
- *
- * Following bus reset, we issue the IDENTIFY [PACKET] DEVICE
- * command, and read back the 512-byte device information page.
- * The device information page is fed to us via the standard
- * PIO-IN protocol, but we hand-code it here. (TODO: investigate
- * using standard PIO-IN paths)
- *
- * After reading the device information page, we use several
- * bits of information from it to initialize data structures
- * that will be used during the lifetime of the ata_device.
- * Other data from the info page is used to disqualify certain
- * older ATA devices we do not wish to support.
+ * ata_dev_configure - Configure the specified ATA/ATAPI device
+ * @ap: Port on which target device resides
+ * @dev: Target device to configure
+ * @print_info: Enable device info printout
+ *
+ * Configure @dev according to @dev->id. Generic and low-level
+ * driver specific fixups are also applied.
*
* LOCKING:
- * Inherited from caller. Some functions called by this function
- * obtain the host_set lock.
+ * Kernel thread context (may sleep)
+ *
+ * RETURNS:
+ * 0 on success, -errno otherwise
*/
-
-static void ata_dev_identify(struct ata_port *ap, unsigned int device)
+static int ata_dev_configure(struct ata_port *ap, struct ata_device *dev,
+ int print_info)
{
- struct ata_device *dev = &ap->device[device];
- unsigned long xfer_modes;
+ const u16 *id = dev->id;
+ unsigned int xfer_mask;
int i, rc;
if (!ata_dev_present(dev)) {
DPRINTK("ENTER/EXIT (host %u, dev %u) -- nodev\n",
- ap->id, device);
- return;
+ ap->id, dev->devno);
+ return 0;
}
- DPRINTK("ENTER, host %u, dev %u\n", ap->id, device);
+ DPRINTK("ENTER, host %u, dev %u\n", ap->id, dev->devno);
- rc = ata_dev_read_id(ap, dev, &dev->class, 1, dev->id);
- if (rc)
- goto err_out;
+ /* print device capabilities */
+ if (print_info)
+ printk(KERN_DEBUG "ata%u: dev %u cfg 49:%04x 82:%04x 83:%04x "
+ "84:%04x 85:%04x 86:%04x 87:%04x 88:%04x\n",
+ ap->id, dev->devno, id[49], id[82], id[83],
+ id[84], id[85], id[86], id[87], id[88]);
+
+ /* initialize to-be-configured parameters */
+ dev->flags = 0;
+ dev->max_sectors = 0;
+ dev->cdb_len = 0;
+ dev->n_sectors = 0;
+ dev->cylinders = 0;
+ dev->heads = 0;
+ dev->sectors = 0;
/*
* common ATA, ATAPI feature tests
*/
- /* we require DMA support (bits 8 of word 49) */
- if (!ata_id_has_dma(dev->id)) {
- printk(KERN_DEBUG "ata%u: no dma\n", ap->id);
- goto err_out_nosup;
- }
-
- /* quick-n-dirty find max transfer mode; for printk only */
- xfer_modes = dev->id[ATA_ID_UDMA_MODES];
- if (!xfer_modes)
- xfer_modes = (dev->id[ATA_ID_MWDMA_MODES]) << ATA_SHIFT_MWDMA;
- if (!xfer_modes)
- xfer_modes = ata_pio_modes(dev);
+ /* find max transfer mode; for printk only */
+ xfer_mask = ata_id_xfermask(id);
- ata_dump_id(dev->id);
+ ata_dump_id(id);
/* ATA-specific feature tests */
if (dev->class == ATA_DEV_ATA) {
- dev->n_sectors = ata_id_n_sectors(dev->id);
+ dev->n_sectors = ata_id_n_sectors(id);
- if (ata_id_has_lba(dev->id)) {
- dev->flags |= ATA_DFLAG_LBA;
+ if (ata_id_has_lba(id)) {
+ const char *lba_desc;
- if (ata_id_has_lba48(dev->id))
+ lba_desc = "LBA";
+ dev->flags |= ATA_DFLAG_LBA;
+ if (ata_id_has_lba48(id)) {
dev->flags |= ATA_DFLAG_LBA48;
+ lba_desc = "LBA48";
+ }
/* print device info to dmesg */
- printk(KERN_INFO "ata%u: dev %u ATA-%d, max %s, %Lu sectors:%s\n",
- ap->id, device,
- ata_id_major_version(dev->id),
- ata_mode_string(xfer_modes),
- (unsigned long long)dev->n_sectors,
- dev->flags & ATA_DFLAG_LBA48 ? " LBA48" : " LBA");
- } else {
+ if (print_info)
+ printk(KERN_INFO "ata%u: dev %u ATA-%d, "
+ "max %s, %Lu sectors: %s\n",
+ ap->id, dev->devno,
+ ata_id_major_version(id),
+ ata_mode_string(xfer_mask),
+ (unsigned long long)dev->n_sectors,
+ lba_desc);
+ } else {
/* CHS */
/* Default translation */
- dev->cylinders = dev->id[1];
- dev->heads = dev->id[3];
- dev->sectors = dev->id[6];
+ dev->cylinders = id[1];
+ dev->heads = id[3];
+ dev->sectors = id[6];
- if (ata_id_current_chs_valid(dev->id)) {
+ if (ata_id_current_chs_valid(id)) {
/* Current CHS translation is valid. */
- dev->cylinders = dev->id[54];
- dev->heads = dev->id[55];
- dev->sectors = dev->id[56];
+ dev->cylinders = id[54];
+ dev->heads = id[55];
+ dev->sectors = id[56];
}
/* print device info to dmesg */
- printk(KERN_INFO "ata%u: dev %u ATA-%d, max %s, %Lu sectors: CHS %d/%d/%d\n",
- ap->id, device,
- ata_id_major_version(dev->id),
- ata_mode_string(xfer_modes),
- (unsigned long long)dev->n_sectors,
- (int)dev->cylinders, (int)dev->heads, (int)dev->sectors);
-
+ if (print_info)
+ printk(KERN_INFO "ata%u: dev %u ATA-%d, "
+ "max %s, %Lu sectors: CHS %u/%u/%u\n",
+ ap->id, dev->devno,
+ ata_id_major_version(id),
+ ata_mode_string(xfer_mask),
+ (unsigned long long)dev->n_sectors,
+ dev->cylinders, dev->heads, dev->sectors);
}
dev->cdb_len = 16;
/* ATAPI-specific feature tests */
else if (dev->class == ATA_DEV_ATAPI) {
- rc = atapi_cdb_len(dev->id);
+ rc = atapi_cdb_len(id);
if ((rc < 12) || (rc > ATAPI_CDB_LEN)) {
printk(KERN_WARNING "ata%u: unsupported CDB len\n", ap->id);
+ rc = -EINVAL;
goto err_out_nosup;
}
dev->cdb_len = (unsigned int) rc;
/* print device info to dmesg */
- printk(KERN_INFO "ata%u: dev %u ATAPI, max %s\n",
- ap->id, device,
- ata_mode_string(xfer_modes));
+ if (print_info)
+ printk(KERN_INFO "ata%u: dev %u ATAPI, max %s\n",
+ ap->id, dev->devno, ata_mode_string(xfer_mask));
}
ap->host->max_cmd_len = 0;
ap->host->max_cmd_len,
ap->device[i].cdb_len);
- DPRINTK("EXIT, drv_stat = 0x%x\n", ata_chk_status(ap));
- return;
-
-err_out_nosup:
- printk(KERN_WARNING "ata%u: dev %u not supported, ignoring\n",
- ap->id, device);
-err_out:
- dev->class++; /* converts ATA_DEV_xxx into ATA_DEV_xxx_UNSUP */
- DPRINTK("EXIT, err\n");
-}
-
-
-static inline u8 ata_dev_knobble(const struct ata_port *ap,
- struct ata_device *dev)
-{
- return ((ap->cbl == ATA_CBL_SATA) && (!ata_id_is_sata(dev->id)));
-}
-
-/**
- * ata_dev_config - Run device specific handlers & 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, &ap->device[i])) {
- printk(KERN_INFO "ata%u(%u): applying bridge limits\n",
- ap->id, i);
+ if (ata_dev_knobble(ap, dev)) {
+ if (print_info)
+ printk(KERN_INFO "ata%u(%u): applying bridge limits\n",
+ ap->id, dev->devno);
ap->udma_mask &= ATA_UDMA5;
- ap->device[i].max_sectors = ATA_MAX_SECTORS;
+ dev->max_sectors = ATA_MAX_SECTORS;
}
if (ap->ops->dev_config)
- ap->ops->dev_config(ap, &ap->device[i]);
+ ap->ops->dev_config(ap, dev);
+
+ DPRINTK("EXIT, drv_stat = 0x%x\n", ata_chk_status(ap));
+ return 0;
+
+err_out_nosup:
+ printk(KERN_WARNING "ata%u: dev %u not supported, ignoring\n",
+ ap->id, dev->devno);
+ DPRINTK("EXIT, err\n");
+ return rc;
}
/**
static int ata_bus_probe(struct ata_port *ap)
{
- unsigned int i, found = 0;
+ unsigned int classes[ATA_MAX_DEVICES];
+ unsigned int i, rc, found = 0;
- if (ap->ops->probe_reset) {
- unsigned int classes[ATA_MAX_DEVICES];
- int rc;
+ ata_port_probe(ap);
- ata_port_probe(ap);
+ /* reset and determine device classes */
+ for (i = 0; i < ATA_MAX_DEVICES; i++)
+ classes[i] = ATA_DEV_UNKNOWN;
+ if (ap->ops->probe_reset) {
rc = ap->ops->probe_reset(ap, classes);
- if (rc == 0) {
- for (i = 0; i < ATA_MAX_DEVICES; i++) {
- if (classes[i] == ATA_DEV_UNKNOWN)
- classes[i] = ATA_DEV_NONE;
- ap->device[i].class = classes[i];
- }
- } else {
- printk(KERN_ERR "ata%u: probe reset failed, "
- "disabling port\n", ap->id);
- ata_port_disable(ap);
+ if (rc) {
+ printk("ata%u: reset failed (errno=%d)\n", ap->id, rc);
+ return rc;
}
- } else
+ } else {
ap->ops->phy_reset(ap);
- if (ap->flags & ATA_FLAG_PORT_DISABLED)
- goto err_out;
+ if (!(ap->flags & ATA_FLAG_PORT_DISABLED))
+ for (i = 0; i < ATA_MAX_DEVICES; i++)
+ classes[i] = ap->device[i].class;
+ ata_port_probe(ap);
+ }
+
+ for (i = 0; i < ATA_MAX_DEVICES; i++)
+ if (classes[i] == ATA_DEV_UNKNOWN)
+ classes[i] = ATA_DEV_NONE;
+
+ /* read IDENTIFY page and configure devices */
for (i = 0; i < ATA_MAX_DEVICES; i++) {
- ata_dev_identify(ap, i);
- if (ata_dev_present(&ap->device[i])) {
- found = 1;
- ata_dev_config(ap,i);
+ struct ata_device *dev = &ap->device[i];
+
+ dev->class = classes[i];
+
+ if (!ata_dev_present(dev))
+ continue;
+
+ WARN_ON(dev->id != NULL);
+ if (ata_dev_read_id(ap, dev, &dev->class, 1, &dev->id)) {
+ dev->class = ATA_DEV_NONE;
+ continue;
+ }
+
+ if (ata_dev_configure(ap, dev, 1)) {
+ dev->class++; /* disable device */
+ continue;
}
+
+ found = 1;
}
- if ((!found) || (ap->flags & ATA_FLAG_PORT_DISABLED))
+ if (!found)
goto err_out_disable;
ata_set_mode(ap);
err_out_disable:
ap->ops->port_disable(ap);
-err_out:
return -1;
}
return 0;
}
-static const struct {
- unsigned int shift;
- u8 base;
-} xfer_mode_classes[] = {
- { ATA_SHIFT_UDMA, XFER_UDMA_0 },
- { ATA_SHIFT_MWDMA, XFER_MW_DMA_0 },
- { ATA_SHIFT_PIO, XFER_PIO_0 },
-};
-
-static u8 base_from_shift(unsigned int shift)
-{
- int i;
-
- for (i = 0; i < ARRAY_SIZE(xfer_mode_classes); i++)
- if (xfer_mode_classes[i].shift == shift)
- return xfer_mode_classes[i].base;
-
- return 0xff;
-}
-
static void ata_dev_set_mode(struct ata_port *ap, struct ata_device *dev)
{
- int ofs, idx;
- u8 base;
-
if (!ata_dev_present(dev) || (ap->flags & ATA_FLAG_PORT_DISABLED))
return;
ata_dev_set_xfermode(ap, dev);
- base = base_from_shift(dev->xfer_shift);
- ofs = dev->xfer_mode - base;
- idx = ofs + dev->xfer_shift;
- WARN_ON(idx >= ARRAY_SIZE(xfer_mode_str));
+ if (ata_dev_revalidate(ap, dev, 0)) {
+ printk(KERN_ERR "ata%u: failed to revalidate after set "
+ "xfermode, disabled\n", ap->id);
+ ata_port_disable(ap);
+ }
- DPRINTK("idx=%d xfer_shift=%u, xfer_mode=0x%x, base=0x%x, offset=%d\n",
- idx, dev->xfer_shift, (int)dev->xfer_mode, (int)base, ofs);
+ DPRINTK("xfer_shift=%u, xfer_mode=0x%x\n",
+ dev->xfer_shift, (int)dev->xfer_mode);
printk(KERN_INFO "ata%u: dev %u configured for %s\n",
- ap->id, dev->devno, xfer_mode_str[idx]);
+ ap->id, dev->devno,
+ ata_mode_string(ata_xfer_mode2mask(dev->xfer_mode)));
}
static int ata_host_set_pio(struct ata_port *ap)
{
- unsigned int mask;
- int x, i;
- u8 base, xfer_mode;
-
- mask = ata_get_mode_mask(ap, ATA_SHIFT_PIO);
- x = fgb(mask);
- if (x < 0) {
- printk(KERN_WARNING "ata%u: no PIO support\n", ap->id);
- return -1;
- }
-
- base = base_from_shift(ATA_SHIFT_PIO);
- xfer_mode = base + x;
-
- DPRINTK("base 0x%x xfer_mode 0x%x mask 0x%x x %d\n",
- (int)base, (int)xfer_mode, mask, x);
+ int i;
for (i = 0; i < ATA_MAX_DEVICES; i++) {
struct ata_device *dev = &ap->device[i];
- if (ata_dev_present(dev)) {
- dev->pio_mode = xfer_mode;
- dev->xfer_mode = xfer_mode;
- dev->xfer_shift = ATA_SHIFT_PIO;
- if (ap->ops->set_piomode)
- ap->ops->set_piomode(ap, dev);
+
+ if (!ata_dev_present(dev))
+ continue;
+
+ if (!dev->pio_mode) {
+ printk(KERN_WARNING "ata%u: no PIO support for device %d.\n", ap->id, i);
+ return -1;
}
+
+ dev->xfer_mode = dev->pio_mode;
+ dev->xfer_shift = ATA_SHIFT_PIO;
+ if (ap->ops->set_piomode)
+ ap->ops->set_piomode(ap, dev);
}
return 0;
}
-static void ata_host_set_dma(struct ata_port *ap, u8 xfer_mode,
- unsigned int xfer_shift)
+static void ata_host_set_dma(struct ata_port *ap)
{
int i;
for (i = 0; i < ATA_MAX_DEVICES; i++) {
struct ata_device *dev = &ap->device[i];
- if (ata_dev_present(dev)) {
- dev->dma_mode = xfer_mode;
- dev->xfer_mode = xfer_mode;
- dev->xfer_shift = xfer_shift;
- if (ap->ops->set_dmamode)
- ap->ops->set_dmamode(ap, dev);
- }
+
+ if (!ata_dev_present(dev) || !dev->dma_mode)
+ continue;
+
+ dev->xfer_mode = dev->dma_mode;
+ dev->xfer_shift = ata_xfer_mode2shift(dev->dma_mode);
+ if (ap->ops->set_dmamode)
+ ap->ops->set_dmamode(ap, dev);
}
}
*/
static void ata_set_mode(struct ata_port *ap)
{
- unsigned int xfer_shift;
- u8 xfer_mode;
- int rc;
+ int i, rc;
- /* step 1: always set host PIO timings */
- rc = ata_host_set_pio(ap);
- if (rc)
- goto err_out;
+ /* step 1: calculate xfer_mask */
+ for (i = 0; i < ATA_MAX_DEVICES; i++) {
+ struct ata_device *dev = &ap->device[i];
+ unsigned int xfer_mask;
+
+ if (!ata_dev_present(dev))
+ continue;
+
+ xfer_mask = ata_dev_xfermask(ap, dev);
+
+ dev->pio_mode = ata_xfer_mask2mode(xfer_mask & ATA_MASK_PIO);
+ dev->dma_mode = ata_xfer_mask2mode(xfer_mask & (ATA_MASK_MWDMA |
+ ATA_MASK_UDMA));
+ }
- /* step 2: choose the best data xfer mode */
- xfer_mode = xfer_shift = 0;
- rc = ata_choose_xfer_mode(ap, &xfer_mode, &xfer_shift);
+ /* step 2: always set host PIO timings */
+ rc = ata_host_set_pio(ap);
if (rc)
goto err_out;
- /* step 3: if that xfer mode isn't PIO, set host DMA timings */
- if (xfer_shift != ATA_SHIFT_PIO)
- ata_host_set_dma(ap, xfer_mode, xfer_shift);
+ /* step 3: set host DMA timings */
+ ata_host_set_dma(ap);
/* step 4: update devices' xfer mode */
- ata_dev_set_mode(ap, &ap->device[0]);
- ata_dev_set_mode(ap, &ap->device[1]);
+ for (i = 0; i < ATA_MAX_DEVICES; i++)
+ ata_dev_set_mode(ap, &ap->device[i]);
if (ap->flags & ATA_FLAG_PORT_DISABLED)
return;
* status is checked. Because waiting for "a while" before
* checking status is fine, post SRST, we perform this magic
* delay here as well.
+ *
+ * Old drivers/ide uses the 2mS rule and then waits for ready
*/
msleep(150);
+
+ /* Before we perform post reset processing we want to see if
+ the bus shows 0xFF because the odd clown forgets the D7 pulldown
+ resistor */
+
+ if (ata_check_status(ap) == 0xFF)
+ return 1; /* Positive is failure for some reason */
+
ata_bus_post_reset(ap, devmask);
return 0;
return rc;
}
-static void ata_pr_blacklisted(const struct ata_port *ap,
- const struct ata_device *dev)
+/**
+ * ata_dev_same_device - Determine whether new ID matches configured device
+ * @ap: port on which the device to compare against resides
+ * @dev: device to compare against
+ * @new_class: class of the new device
+ * @new_id: IDENTIFY page of the new device
+ *
+ * Compare @new_class and @new_id against @dev and determine
+ * whether @dev is the device indicated by @new_class and
+ * @new_id.
+ *
+ * LOCKING:
+ * None.
+ *
+ * RETURNS:
+ * 1 if @dev matches @new_class and @new_id, 0 otherwise.
+ */
+static int ata_dev_same_device(struct ata_port *ap, struct ata_device *dev,
+ unsigned int new_class, const u16 *new_id)
{
- printk(KERN_WARNING "ata%u: dev %u is on DMA blacklist, disabling DMA\n",
- ap->id, dev->devno);
-}
+ const u16 *old_id = dev->id;
+ unsigned char model[2][41], serial[2][21];
+ u64 new_n_sectors;
-static const char * const ata_dma_blacklist [] = {
- "WDC AC11000H",
- "WDC AC22100H",
- "WDC AC32500H",
- "WDC AC33100H",
- "WDC AC31600H",
- "WDC AC32100H",
- "WDC AC23200L",
- "Compaq CRD-8241B",
- "CRD-8400B",
- "CRD-8480B",
- "CRD-8482B",
- "CRD-84",
- "SanDisk SDP3B",
- "SanDisk SDP3B-64",
- "SANYO CD-ROM CRD",
- "HITACHI CDR-8",
- "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",
- "WPI CDD-820",
- "SAMSUNG CD-ROM SC-148C",
- "SAMSUNG CD-ROM SC",
- "SanDisk SDP3B-64",
- "ATAPI CD-ROM DRIVE 40X MAXIMUM",
- "_NEC DV5800A",
-};
+ if (dev->class != new_class) {
+ printk(KERN_INFO
+ "ata%u: dev %u class mismatch %d != %d\n",
+ ap->id, dev->devno, dev->class, new_class);
+ return 0;
+ }
-static int ata_dma_blacklisted(const struct ata_device *dev)
-{
- unsigned char model_num[41];
- int i;
+ ata_id_c_string(old_id, model[0], ATA_ID_PROD_OFS, sizeof(model[0]));
+ ata_id_c_string(new_id, model[1], ATA_ID_PROD_OFS, sizeof(model[1]));
+ ata_id_c_string(old_id, serial[0], ATA_ID_SERNO_OFS, sizeof(serial[0]));
+ ata_id_c_string(new_id, serial[1], ATA_ID_SERNO_OFS, sizeof(serial[1]));
+ new_n_sectors = ata_id_n_sectors(new_id);
- ata_id_c_string(dev->id, model_num, ATA_ID_PROD_OFS, sizeof(model_num));
+ if (strcmp(model[0], model[1])) {
+ printk(KERN_INFO
+ "ata%u: dev %u model number mismatch '%s' != '%s'\n",
+ ap->id, dev->devno, model[0], model[1]);
+ return 0;
+ }
- for (i = 0; i < ARRAY_SIZE(ata_dma_blacklist); i++)
- if (!strcmp(ata_dma_blacklist[i], model_num))
- return 1;
+ if (strcmp(serial[0], serial[1])) {
+ printk(KERN_INFO
+ "ata%u: dev %u serial number mismatch '%s' != '%s'\n",
+ ap->id, dev->devno, serial[0], serial[1]);
+ return 0;
+ }
- return 0;
+ if (dev->class == ATA_DEV_ATA && dev->n_sectors != new_n_sectors) {
+ printk(KERN_INFO
+ "ata%u: dev %u n_sectors mismatch %llu != %llu\n",
+ ap->id, dev->devno, (unsigned long long)dev->n_sectors,
+ (unsigned long long)new_n_sectors);
+ return 0;
+ }
+
+ return 1;
}
-static unsigned int ata_get_mode_mask(const struct ata_port *ap, int shift)
+/**
+ * ata_dev_revalidate - Revalidate ATA device
+ * @ap: port on which the device to revalidate resides
+ * @dev: device to revalidate
+ * @post_reset: is this revalidation after reset?
+ *
+ * Re-read IDENTIFY page and make sure @dev is still attached to
+ * the port.
+ *
+ * LOCKING:
+ * Kernel thread context (may sleep)
+ *
+ * RETURNS:
+ * 0 on success, negative errno otherwise
+ */
+int ata_dev_revalidate(struct ata_port *ap, struct ata_device *dev,
+ int post_reset)
{
- const struct ata_device *master, *slave;
- unsigned int mask;
+ unsigned int class;
+ u16 *id;
+ int rc;
- master = &ap->device[0];
- slave = &ap->device[1];
+ if (!ata_dev_present(dev))
+ return -ENODEV;
- WARN_ON(!ata_dev_present(master) && !ata_dev_present(slave));
+ class = dev->class;
+ id = NULL;
- if (shift == ATA_SHIFT_UDMA) {
- mask = ap->udma_mask;
- if (ata_dev_present(master)) {
- mask &= (master->id[ATA_ID_UDMA_MODES] & 0xff);
- if (ata_dma_blacklisted(master)) {
- mask = 0;
- ata_pr_blacklisted(ap, master);
- }
- }
- if (ata_dev_present(slave)) {
- mask &= (slave->id[ATA_ID_UDMA_MODES] & 0xff);
- if (ata_dma_blacklisted(slave)) {
- mask = 0;
- ata_pr_blacklisted(ap, slave);
- }
- }
- }
- else if (shift == ATA_SHIFT_MWDMA) {
- mask = ap->mwdma_mask;
- if (ata_dev_present(master)) {
- mask &= (master->id[ATA_ID_MWDMA_MODES] & 0x07);
- if (ata_dma_blacklisted(master)) {
- mask = 0;
- ata_pr_blacklisted(ap, master);
- }
- }
- if (ata_dev_present(slave)) {
- mask &= (slave->id[ATA_ID_MWDMA_MODES] & 0x07);
- if (ata_dma_blacklisted(slave)) {
- mask = 0;
- ata_pr_blacklisted(ap, slave);
- }
- }
- }
- else if (shift == ATA_SHIFT_PIO) {
- mask = ap->pio_mask;
- if (ata_dev_present(master)) {
- /* spec doesn't return explicit support for
- * PIO0-2, so we fake it
- */
- u16 tmp_mode = master->id[ATA_ID_PIO_MODES] & 0x03;
- tmp_mode <<= 3;
- tmp_mode |= 0x7;
- mask &= tmp_mode;
- }
- if (ata_dev_present(slave)) {
- /* spec doesn't return explicit support for
- * PIO0-2, so we fake it
- */
- u16 tmp_mode = slave->id[ATA_ID_PIO_MODES] & 0x03;
- tmp_mode <<= 3;
- tmp_mode |= 0x7;
- mask &= tmp_mode;
- }
- }
- else {
- mask = 0xffffffff; /* shut up compiler warning */
- BUG();
+ /* allocate & read ID data */
+ rc = ata_dev_read_id(ap, dev, &class, post_reset, &id);
+ if (rc)
+ goto fail;
+
+ /* is the device still there? */
+ if (!ata_dev_same_device(ap, dev, class, id)) {
+ rc = -ENODEV;
+ goto fail;
}
- return mask;
+ kfree(dev->id);
+ dev->id = id;
+
+ /* configure device according to the new ID */
+ return ata_dev_configure(ap, dev, 0);
+
+ fail:
+ printk(KERN_ERR "ata%u: dev %u revalidation failed (errno=%d)\n",
+ ap->id, dev->devno, rc);
+ kfree(id);
+ return rc;
}
-/* find greatest bit */
-static int fgb(u32 bitmap)
+static const char * const ata_dma_blacklist [] = {
+ "WDC AC11000H", NULL,
+ "WDC AC22100H", NULL,
+ "WDC AC32500H", NULL,
+ "WDC AC33100H", NULL,
+ "WDC AC31600H", NULL,
+ "WDC AC32100H", "24.09P07",
+ "WDC AC23200L", "21.10N21",
+ "Compaq CRD-8241B", NULL,
+ "CRD-8400B", NULL,
+ "CRD-8480B", NULL,
+ "CRD-8482B", NULL,
+ "CRD-84", NULL,
+ "SanDisk SDP3B", NULL,
+ "SanDisk SDP3B-64", NULL,
+ "SANYO CD-ROM CRD", NULL,
+ "HITACHI CDR-8", NULL,
+ "HITACHI CDR-8335", NULL,
+ "HITACHI CDR-8435", NULL,
+ "Toshiba CD-ROM XM-6202B", NULL,
+ "TOSHIBA CD-ROM XM-1702BC", NULL,
+ "CD-532E-A", NULL,
+ "E-IDE CD-ROM CR-840", NULL,
+ "CD-ROM Drive/F5A", NULL,
+ "WPI CDD-820", NULL,
+ "SAMSUNG CD-ROM SC-148C", NULL,
+ "SAMSUNG CD-ROM SC", NULL,
+ "SanDisk SDP3B-64", NULL,
+ "ATAPI CD-ROM DRIVE 40X MAXIMUM",NULL,
+ "_NEC DV5800A", NULL,
+ "SAMSUNG CD-ROM SN-124", "N001"
+};
+
+static int ata_strim(char *s, size_t len)
{
- unsigned int i;
- int x = -1;
+ len = strnlen(s, len);
- for (i = 0; i < 32; i++)
- if (bitmap & (1 << i))
- x = i;
+ /* ATAPI specifies that empty space is blank-filled; remove blanks */
+ while ((len > 0) && (s[len - 1] == ' ')) {
+ len--;
+ s[len] = 0;
+ }
+ return len;
+}
+
+static int ata_dma_blacklisted(const struct ata_device *dev)
+{
+ unsigned char model_num[40];
+ unsigned char model_rev[16];
+ unsigned int nlen, rlen;
+ int i;
- return x;
+ ata_id_string(dev->id, model_num, ATA_ID_PROD_OFS,
+ sizeof(model_num));
+ ata_id_string(dev->id, model_rev, ATA_ID_FW_REV_OFS,
+ sizeof(model_rev));
+ nlen = ata_strim(model_num, sizeof(model_num));
+ rlen = ata_strim(model_rev, sizeof(model_rev));
+
+ for (i = 0; i < ARRAY_SIZE(ata_dma_blacklist); i += 2) {
+ if (!strncmp(ata_dma_blacklist[i], model_num, nlen)) {
+ if (ata_dma_blacklist[i+1] == NULL)
+ return 1;
+ if (!strncmp(ata_dma_blacklist[i], model_rev, rlen))
+ return 1;
+ }
+ }
+ return 0;
}
/**
- * ata_choose_xfer_mode - attempt to find best transfer mode
- * @ap: Port for which an xfer mode will be selected
- * @xfer_mode_out: (output) SET FEATURES - XFER MODE code
- * @xfer_shift_out: (output) bit shift that selects this mode
+ * ata_dev_xfermask - Compute supported xfermask of the given device
+ * @ap: Port on which the device to compute xfermask for resides
+ * @dev: Device to compute xfermask for
*
- * Based on host and device capabilities, determine the
- * maximum transfer mode that is amenable to all.
+ * Compute supported xfermask of @dev. This function is
+ * responsible for applying all known limits including host
+ * controller limits, device blacklist, etc...
*
* LOCKING:
- * PCI/etc. bus probe sem.
+ * None.
*
* RETURNS:
- * Zero on success, negative on error.
+ * Computed xfermask.
*/
-
-static int ata_choose_xfer_mode(const struct ata_port *ap,
- u8 *xfer_mode_out,
- unsigned int *xfer_shift_out)
+static unsigned int ata_dev_xfermask(struct ata_port *ap,
+ struct ata_device *dev)
{
- unsigned int mask, shift;
- int x, i;
+ unsigned long xfer_mask;
+ int i;
- for (i = 0; i < ARRAY_SIZE(xfer_mode_classes); i++) {
- shift = xfer_mode_classes[i].shift;
- mask = ata_get_mode_mask(ap, shift);
+ xfer_mask = ata_pack_xfermask(ap->pio_mask, ap->mwdma_mask,
+ ap->udma_mask);
- x = fgb(mask);
- if (x >= 0) {
- *xfer_mode_out = xfer_mode_classes[i].base + x;
- *xfer_shift_out = shift;
- return 0;
- }
+ /* use port-wide xfermask for now */
+ for (i = 0; i < ATA_MAX_DEVICES; i++) {
+ struct ata_device *d = &ap->device[i];
+ if (!ata_dev_present(d))
+ continue;
+ xfer_mask &= ata_id_xfermask(d->id);
+ if (ata_dma_blacklisted(d))
+ xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA);
}
- return -1;
+ if (ata_dma_blacklisted(dev))
+ printk(KERN_WARNING "ata%u: dev %u is on DMA blacklist, "
+ "disabling DMA\n", ap->id, dev->devno);
+
+ return xfer_mask;
}
/**
}
/**
- * ata_dev_reread_id - Reread the device identify device info
- * @ap: port where the device is
- * @dev: device to reread the identify device info
- *
- * LOCKING:
- */
-
-static void ata_dev_reread_id(struct ata_port *ap, struct ata_device *dev)
-{
- struct ata_taskfile tf;
-
- ata_tf_init(ap, &tf, dev->devno);
-
- if (dev->class == ATA_DEV_ATA) {
- tf.command = ATA_CMD_ID_ATA;
- DPRINTK("do ATA identify\n");
- } else {
- tf.command = ATA_CMD_ID_ATAPI;
- DPRINTK("do ATAPI identify\n");
- }
-
- tf.flags |= ATA_TFLAG_DEVICE;
- tf.protocol = ATA_PROT_PIO;
-
- if (ata_exec_internal(ap, dev, &tf, DMA_FROM_DEVICE,
- dev->id, sizeof(dev->id)))
- goto err_out;
-
- swap_buf_le16(dev->id, ATA_ID_WORDS);
-
- ata_dump_id(dev->id);
-
- DPRINTK("EXIT\n");
-
- return;
-err_out:
- printk(KERN_ERR "ata%u: failed to reread ID, disabled\n", ap->id);
- ata_port_disable(ap);
-}
-
-/**
* ata_dev_init_params - Issue INIT DEV PARAMS command
* @ap: Port associated with device @dev
* @dev: Device to which command will be sent
ata_fill_sg(qc);
}
+void ata_noop_qc_prep(struct ata_queued_cmd *qc) { }
+
/**
* ata_sg_init_one - Associate command with memory buffer
* @qc: Command to be associated
}
if (timeout)
- ata_queue_delayed_pio_task(ap, timeout);
+ ata_port_queue_task(ap, ata_pio_task, ap, timeout);
else if (!qc_completed)
goto fsm_start;
}
/**
+ * atapi_packet_task - Write CDB bytes to hardware
+ * @_data: Port to which ATAPI device is attached.
+ *
+ * When device has indicated its readiness to accept
+ * a CDB, this function is called. Send the CDB.
+ * If DMA is to be performed, exit immediately.
+ * Otherwise, we are in polling mode, so poll
+ * status under operation succeeds or fails.
+ *
+ * LOCKING:
+ * Kernel thread context (may sleep)
+ */
+
+static void atapi_packet_task(void *_data)
+{
+ struct ata_port *ap = _data;
+ struct ata_queued_cmd *qc;
+ u8 status;
+
+ qc = ata_qc_from_tag(ap, ap->active_tag);
+ WARN_ON(qc == NULL);
+ WARN_ON(!(qc->flags & ATA_QCFLAG_ACTIVE));
+
+ /* sleep-wait for BSY to clear */
+ DPRINTK("busy wait\n");
+ if (ata_busy_sleep(ap, ATA_TMOUT_CDB_QUICK, ATA_TMOUT_CDB)) {
+ qc->err_mask |= AC_ERR_TIMEOUT;
+ goto err_out;
+ }
+
+ /* make sure DRQ is set */
+ status = ata_chk_status(ap);
+ if ((status & (ATA_BUSY | ATA_DRQ)) != ATA_DRQ) {
+ qc->err_mask |= AC_ERR_HSM;
+ goto err_out;
+ }
+
+ /* send SCSI cdb */
+ DPRINTK("send cdb\n");
+ WARN_ON(qc->dev->cdb_len < 12);
+
+ if (qc->tf.protocol == ATA_PROT_ATAPI_DMA ||
+ qc->tf.protocol == ATA_PROT_ATAPI_NODATA) {
+ unsigned long flags;
+
+ /* Once we're done issuing command and kicking bmdma,
+ * irq handler takes over. To not lose irq, we need
+ * to clear NOINTR flag before sending cdb, but
+ * interrupt handler shouldn't be invoked before we're
+ * finished. Hence, the following locking.
+ */
+ spin_lock_irqsave(&ap->host_set->lock, flags);
+ ap->flags &= ~ATA_FLAG_NOINTR;
+ ata_data_xfer(ap, qc->cdb, qc->dev->cdb_len, 1);
+ if (qc->tf.protocol == ATA_PROT_ATAPI_DMA)
+ ap->ops->bmdma_start(qc); /* initiate bmdma */
+ spin_unlock_irqrestore(&ap->host_set->lock, flags);
+ } else {
+ ata_data_xfer(ap, qc->cdb, qc->dev->cdb_len, 1);
+
+ /* PIO commands are handled by polling */
+ ap->hsm_task_state = HSM_ST;
+ ata_port_queue_task(ap, ata_pio_task, ap, 0);
+ }
+
+ return;
+
+err_out:
+ ata_poll_qc_complete(qc);
+}
+
+/**
* ata_qc_timeout - Handle timeout of queued command
* @qc: Command that timed out
*
DPRINTK("ENTER\n");
- ata_flush_pio_tasks(ap);
ap->hsm_task_state = HSM_ST_IDLE;
spin_lock_irqsave(&host_set->lock, flags);
case ATA_PROT_ATAPI:
case ATA_PROT_PIO:
- case ATA_PROT_PIO_MULT:
if (ap->flags & ATA_FLAG_PIO_DMA)
return 1;
ata_qc_set_polling(qc);
ata_tf_to_host(ap, &qc->tf);
ap->hsm_task_state = HSM_ST;
- ata_queue_pio_task(ap);
+ ata_port_queue_task(ap, ata_pio_task, ap, 0);
break;
case ATA_PROT_ATAPI:
ata_qc_set_polling(qc);
ata_tf_to_host(ap, &qc->tf);
- ata_queue_packet_task(ap);
+ ata_port_queue_task(ap, atapi_packet_task, ap, 0);
break;
case ATA_PROT_ATAPI_NODATA:
ap->flags |= ATA_FLAG_NOINTR;
ata_tf_to_host(ap, &qc->tf);
- ata_queue_packet_task(ap);
+ ata_port_queue_task(ap, atapi_packet_task, ap, 0);
break;
case ATA_PROT_ATAPI_DMA:
ap->flags |= ATA_FLAG_NOINTR;
ap->ops->tf_load(ap, &qc->tf); /* load tf registers */
ap->ops->bmdma_setup(qc); /* set up bmdma */
- ata_queue_packet_task(ap);
+ ata_port_queue_task(ap, atapi_packet_task, ap, 0);
break;
default:
}
/**
- * ata_bmdma_setup_mmio - Set up PCI IDE BMDMA transaction
- * @qc: Info associated with this ATA transaction.
- *
- * LOCKING:
- * spin_lock_irqsave(host_set lock)
- */
-
-static void ata_bmdma_setup_mmio (struct ata_queued_cmd *qc)
-{
- struct ata_port *ap = qc->ap;
- unsigned int rw = (qc->tf.flags & ATA_TFLAG_WRITE);
- u8 dmactl;
- void __iomem *mmio = (void __iomem *) ap->ioaddr.bmdma_addr;
-
- /* load PRD table addr. */
- mb(); /* make sure PRD table writes are visible to controller */
- writel(ap->prd_dma, mmio + ATA_DMA_TABLE_OFS);
-
- /* specify data direction, triple-check start bit is clear */
- dmactl = readb(mmio + ATA_DMA_CMD);
- dmactl &= ~(ATA_DMA_WR | ATA_DMA_START);
- if (!rw)
- dmactl |= ATA_DMA_WR;
- writeb(dmactl, mmio + ATA_DMA_CMD);
-
- /* issue r/w command */
- ap->ops->exec_command(ap, &qc->tf);
-}
-
-/**
- * ata_bmdma_start_mmio - Start a PCI IDE BMDMA transaction
- * @qc: Info associated with this ATA transaction.
- *
- * LOCKING:
- * spin_lock_irqsave(host_set lock)
- */
-
-static void ata_bmdma_start_mmio (struct ata_queued_cmd *qc)
-{
- struct ata_port *ap = qc->ap;
- void __iomem *mmio = (void __iomem *) ap->ioaddr.bmdma_addr;
- u8 dmactl;
-
- /* start host DMA transaction */
- dmactl = readb(mmio + ATA_DMA_CMD);
- writeb(dmactl | ATA_DMA_START, mmio + ATA_DMA_CMD);
-
- /* Strictly, one may wish to issue a readb() here, to
- * flush the mmio write. However, control also passes
- * to the hardware at this point, and it will interrupt
- * us when we are to resume control. So, in effect,
- * we don't care when the mmio write flushes.
- * Further, a read of the DMA status register _immediately_
- * following the write may not be what certain flaky hardware
- * is expected, so I think it is best to not add a readb()
- * without first all the MMIO ATA cards/mobos.
- * Or maybe I'm just being paranoid.
- */
-}
-
-/**
- * ata_bmdma_setup_pio - Set up PCI IDE BMDMA transaction (PIO)
- * @qc: Info associated with this ATA transaction.
- *
- * LOCKING:
- * spin_lock_irqsave(host_set lock)
- */
-
-static void ata_bmdma_setup_pio (struct ata_queued_cmd *qc)
-{
- struct ata_port *ap = qc->ap;
- unsigned int rw = (qc->tf.flags & ATA_TFLAG_WRITE);
- u8 dmactl;
-
- /* load PRD table addr. */
- outl(ap->prd_dma, ap->ioaddr.bmdma_addr + ATA_DMA_TABLE_OFS);
-
- /* specify data direction, triple-check start bit is clear */
- dmactl = inb(ap->ioaddr.bmdma_addr + ATA_DMA_CMD);
- dmactl &= ~(ATA_DMA_WR | ATA_DMA_START);
- if (!rw)
- dmactl |= ATA_DMA_WR;
- outb(dmactl, ap->ioaddr.bmdma_addr + ATA_DMA_CMD);
-
- /* issue r/w command */
- ap->ops->exec_command(ap, &qc->tf);
-}
-
-/**
- * ata_bmdma_start_pio - Start a PCI IDE BMDMA transaction (PIO)
- * @qc: Info associated with this ATA transaction.
- *
- * LOCKING:
- * spin_lock_irqsave(host_set lock)
- */
-
-static void ata_bmdma_start_pio (struct ata_queued_cmd *qc)
-{
- struct ata_port *ap = qc->ap;
- u8 dmactl;
-
- /* start host DMA transaction */
- dmactl = inb(ap->ioaddr.bmdma_addr + ATA_DMA_CMD);
- outb(dmactl | ATA_DMA_START,
- 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)
- ata_bmdma_start_mmio(qc);
- else
- 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)
- ata_bmdma_setup_mmio(qc);
- else
- 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) {
- void __iomem *mmio = ((void __iomem *) ap->ioaddr.bmdma_addr) + ATA_DMA_STATUS;
- writeb(readb(mmio), mmio);
- } else {
- unsigned long addr = ap->ioaddr.bmdma_addr + ATA_DMA_STATUS;
- outb(inb(addr), addr);
- }
-
-}
-
-
-/**
- * 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;
- if (ap->flags & ATA_FLAG_MMIO) {
- void __iomem *mmio = (void __iomem *) ap->ioaddr.bmdma_addr;
- host_stat = readb(mmio + ATA_DMA_STATUS);
- } else
- host_stat = inb(ap->ioaddr.bmdma_addr + ATA_DMA_STATUS);
- return host_stat;
-}
-
-
-/**
- * ata_bmdma_stop - Stop PCI IDE BMDMA transfer
- * @qc: Command we are ending DMA for
- *
- * 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_queued_cmd *qc)
-{
- struct ata_port *ap = qc->ap;
- if (ap->flags & ATA_FLAG_MMIO) {
- void __iomem *mmio = (void __iomem *) ap->ioaddr.bmdma_addr;
-
- /* clear start/stop bit */
- writeb(readb(mmio + ATA_DMA_CMD) & ~ATA_DMA_START,
- mmio + ATA_DMA_CMD);
- } else {
- /* clear start/stop bit */
- outb(inb(ap->ioaddr.bmdma_addr + ATA_DMA_CMD) & ~ATA_DMA_START,
- ap->ioaddr.bmdma_addr + ATA_DMA_CMD);
- }
-
- /* one-PIO-cycle guaranteed wait, per spec, for HDMA1:0 transition */
- ata_altstatus(ap); /* dummy read */
-}
-
-/**
* ata_host_intr - Handle host interrupt for given (port, task)
* @ap: Port on which interrupt arrived (possibly...)
* @qc: Taskfile currently active in engine
#ifdef ATA_IRQ_TRAP
if ((ap->stats.idle_irq % 1000) == 0) {
- handled = 1;
ata_irq_ack(ap, 0); /* debug trap */
printk(KERN_WARNING "ata%d: irq trap\n", ap->id);
+ return 1;
}
#endif
return 0; /* irq not handled */
return IRQ_RETVAL(handled);
}
-/**
- * atapi_packet_task - Write CDB bytes to hardware
- * @_data: Port to which ATAPI device is attached.
- *
- * When device has indicated its readiness to accept
- * a CDB, this function is called. Send the CDB.
- * If DMA is to be performed, exit immediately.
- * Otherwise, we are in polling mode, so poll
- * status under operation succeeds or fails.
- *
- * LOCKING:
- * Kernel thread context (may sleep)
- */
-
-static void atapi_packet_task(void *_data)
-{
- struct ata_port *ap = _data;
- struct ata_queued_cmd *qc;
- u8 status;
-
- qc = ata_qc_from_tag(ap, ap->active_tag);
- WARN_ON(qc == NULL);
- WARN_ON(!(qc->flags & ATA_QCFLAG_ACTIVE));
-
- /* sleep-wait for BSY to clear */
- DPRINTK("busy wait\n");
- if (ata_busy_sleep(ap, ATA_TMOUT_CDB_QUICK, ATA_TMOUT_CDB)) {
- qc->err_mask |= AC_ERR_TIMEOUT;
- goto err_out;
- }
-
- /* make sure DRQ is set */
- status = ata_chk_status(ap);
- if ((status & (ATA_BUSY | ATA_DRQ)) != ATA_DRQ) {
- qc->err_mask |= AC_ERR_HSM;
- goto err_out;
- }
-
- /* send SCSI cdb */
- DPRINTK("send cdb\n");
- WARN_ON(qc->dev->cdb_len < 12);
-
- if (qc->tf.protocol == ATA_PROT_ATAPI_DMA ||
- qc->tf.protocol == ATA_PROT_ATAPI_NODATA) {
- unsigned long flags;
-
- /* Once we're done issuing command and kicking bmdma,
- * irq handler takes over. To not lose irq, we need
- * to clear NOINTR flag before sending cdb, but
- * interrupt handler shouldn't be invoked before we're
- * finished. Hence, the following locking.
- */
- spin_lock_irqsave(&ap->host_set->lock, flags);
- ap->flags &= ~ATA_FLAG_NOINTR;
- ata_data_xfer(ap, qc->cdb, qc->dev->cdb_len, 1);
- if (qc->tf.protocol == ATA_PROT_ATAPI_DMA)
- ap->ops->bmdma_start(qc); /* initiate bmdma */
- spin_unlock_irqrestore(&ap->host_set->lock, flags);
- } else {
- ata_data_xfer(ap, qc->cdb, qc->dev->cdb_len, 1);
-
- /* PIO commands are handled by polling */
- ap->hsm_task_state = HSM_ST;
- ata_queue_pio_task(ap);
- }
-
- return;
-
-err_out:
- ata_poll_qc_complete(qc);
-}
-
/*
* Execute a 'simple' command, that only consists of the opcode 'cmd' itself,
ap->active_tag = ATA_TAG_POISON;
ap->last_ctl = 0xFF;
- INIT_WORK(&ap->packet_task, atapi_packet_task, ap);
- INIT_WORK(&ap->pio_task, ata_pio_task, ap);
+ INIT_WORK(&ap->port_task, NULL, NULL);
INIT_LIST_HEAD(&ap->eh_done_q);
for (i = 0; i < ATA_MAX_DEVICES; i++)
if (!host)
return NULL;
+ host->transportt = &ata_scsi_transport_template;
+
ap = (struct ata_port *) &host->hostdata[0];
ata_host_init(ap, host, host_set, ent, port_no);
int ata_scsi_release(struct Scsi_Host *host)
{
struct ata_port *ap = (struct ata_port *) &host->hostdata[0];
+ int i;
DPRINTK("ENTER\n");
ap->ops->port_disable(ap);
ata_host_remove(ap, 0);
+ for (i = 0; i < ATA_MAX_DEVICES; i++)
+ kfree(ap->device[i].id);
DPRINTK("EXIT\n");
return 1;
EXPORT_SYMBOL_GPL(ata_host_stop);
EXPORT_SYMBOL_GPL(ata_interrupt);
EXPORT_SYMBOL_GPL(ata_qc_prep);
+EXPORT_SYMBOL_GPL(ata_noop_qc_prep);
EXPORT_SYMBOL_GPL(ata_bmdma_setup);
EXPORT_SYMBOL_GPL(ata_bmdma_start);
EXPORT_SYMBOL_GPL(ata_bmdma_irq_clear);
EXPORT_SYMBOL_GPL(ata_std_postreset);
EXPORT_SYMBOL_GPL(ata_std_probe_reset);
EXPORT_SYMBOL_GPL(ata_drive_probe_reset);
+EXPORT_SYMBOL_GPL(ata_dev_revalidate);
EXPORT_SYMBOL_GPL(ata_port_disable);
EXPORT_SYMBOL_GPL(ata_ratelimit);
EXPORT_SYMBOL_GPL(ata_busy_sleep);
+EXPORT_SYMBOL_GPL(ata_port_queue_task);
EXPORT_SYMBOL_GPL(ata_scsi_ioctl);
EXPORT_SYMBOL_GPL(ata_scsi_queuecmd);
-EXPORT_SYMBOL_GPL(ata_scsi_timed_out);
EXPORT_SYMBOL_GPL(ata_scsi_error);
EXPORT_SYMBOL_GPL(ata_scsi_slave_config);
EXPORT_SYMBOL_GPL(ata_scsi_release);
EXPORT_SYMBOL_GPL(ata_dev_classify);
EXPORT_SYMBOL_GPL(ata_id_string);
EXPORT_SYMBOL_GPL(ata_id_c_string);
-EXPORT_SYMBOL_GPL(ata_dev_config);
EXPORT_SYMBOL_GPL(ata_scsi_simulate);
EXPORT_SYMBOL_GPL(ata_eh_qc_complete);
EXPORT_SYMBOL_GPL(ata_eh_qc_retry);
EXPORT_SYMBOL_GPL(ata_pci_remove_one);
EXPORT_SYMBOL_GPL(ata_pci_device_suspend);
EXPORT_SYMBOL_GPL(ata_pci_device_resume);
+EXPORT_SYMBOL_GPL(ata_pci_default_filter);
+EXPORT_SYMBOL_GPL(ata_pci_clear_simplex);
#endif /* CONFIG_PCI */
EXPORT_SYMBOL_GPL(ata_device_suspend);
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff