#include <scsi/scsi_eh.h>
#include <scsi/scsi_device.h>
#include <scsi/scsi_request.h>
+#include <scsi/scsi_tcq.h>
#include <scsi/scsi_transport.h>
#include <linux/libata.h>
#include <linux/hdreg.h>
/**
* ata_scsi_qc_new - acquire new ata_queued_cmd reference
- * @ap: ATA port to which the new command is attached
* @dev: ATA device to which the new command is attached
* @cmd: SCSI command that originated this ATA command
* @done: SCSI command completion function
* RETURNS:
* Command allocated, or %NULL if none available.
*/
-struct ata_queued_cmd *ata_scsi_qc_new(struct ata_port *ap,
- struct ata_device *dev,
+struct ata_queued_cmd *ata_scsi_qc_new(struct ata_device *dev,
struct scsi_cmnd *cmd,
void (*done)(struct scsi_cmnd *))
{
struct ata_queued_cmd *qc;
- qc = ata_qc_new_init(ap, dev);
+ qc = ata_qc_new_init(dev);
if (qc) {
qc->scsicmd = cmd;
qc->scsidone = done;
struct ata_port *ap = ata_shost_to_port(sdev->host);
struct ata_device *dev = &ap->device[sdev->id];
- return ata_device_resume(ap, dev);
+ return ata_device_resume(dev);
}
int ata_scsi_device_suspend(struct scsi_device *sdev, pm_message_t state)
struct ata_port *ap = ata_shost_to_port(sdev->host);
struct ata_device *dev = &ap->device[sdev->id];
- return ata_device_suspend(ap, dev, state);
+ return ata_device_suspend(dev, state);
}
/**
* @sk: the sense key we'll fill out
* @asc: the additional sense code we'll fill out
* @ascq: the additional sense code qualifier we'll fill out
+ * @verbose: be verbose
*
* Converts an ATA error into a SCSI error. Fill out pointers to
* SK, ASC, and ASCQ bytes for later use in fixed or descriptor
* spin_lock_irqsave(host_set lock)
*/
void ata_to_sense_error(unsigned id, u8 drv_stat, u8 drv_err, u8 *sk, u8 *asc,
- u8 *ascq)
+ u8 *ascq, int verbose)
{
int i;
}
}
/* No immediate match */
- printk(KERN_WARNING "ata%u: no sense translation for "
- "error 0x%02x\n", id, drv_err);
+ if (verbose)
+ printk(KERN_WARNING "ata%u: no sense translation for "
+ "error 0x%02x\n", id, drv_err);
}
/* Fall back to interpreting status bits */
}
}
/* No error? Undecoded? */
- printk(KERN_WARNING "ata%u: no sense translation for status: 0x%02x\n",
- id, drv_stat);
+ if (verbose)
+ printk(KERN_WARNING "ata%u: no sense translation for "
+ "status: 0x%02x\n", id, drv_stat);
/* We need a sensible error return here, which is tricky, and one
that won't cause people to do things like return a disk wrongly */
*ascq = 0x00;
translate_done:
- printk(KERN_ERR "ata%u: translated ATA stat/err 0x%02x/%02x to "
- "SCSI SK/ASC/ASCQ 0x%x/%02x/%02x\n", id, drv_stat, drv_err,
- *sk, *asc, *ascq);
+ if (verbose)
+ printk(KERN_ERR "ata%u: translated ATA stat/err 0x%02x/%02x "
+ "to SCSI SK/ASC/ASCQ 0x%x/%02x/%02x\n",
+ id, drv_stat, drv_err, *sk, *asc, *ascq);
return;
}
void ata_gen_ata_desc_sense(struct ata_queued_cmd *qc)
{
struct scsi_cmnd *cmd = qc->scsicmd;
- struct ata_taskfile *tf = &qc->tf;
+ struct ata_taskfile *tf = &qc->result_tf;
unsigned char *sb = cmd->sense_buffer;
unsigned char *desc = sb + 8;
+ int verbose = qc->ap->ops->error_handler == NULL;
memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
if (qc->err_mask ||
tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
ata_to_sense_error(qc->ap->id, tf->command, tf->feature,
- &sb[1], &sb[2], &sb[3]);
+ &sb[1], &sb[2], &sb[3], verbose);
sb[1] &= 0x0f;
}
void ata_gen_fixed_sense(struct ata_queued_cmd *qc)
{
struct scsi_cmnd *cmd = qc->scsicmd;
- struct ata_taskfile *tf = &qc->tf;
+ struct ata_taskfile *tf = &qc->result_tf;
unsigned char *sb = cmd->sense_buffer;
+ int verbose = qc->ap->ops->error_handler == NULL;
memset(sb, 0, SCSI_SENSE_BUFFERSIZE);
if (qc->err_mask ||
tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) {
ata_to_sense_error(qc->ap->id, tf->command, tf->feature,
- &sb[2], &sb[12], &sb[13]);
+ &sb[2], &sb[12], &sb[13], verbose);
sb[2] &= 0x0f;
}
*/
max_sectors = ATA_MAX_SECTORS;
if (dev->flags & ATA_DFLAG_LBA48)
- max_sectors = 2048;
+ max_sectors = ATA_MAX_SECTORS_LBA48;
if (dev->max_sectors)
max_sectors = dev->max_sectors;
request_queue_t *q = sdev->request_queue;
blk_queue_max_hw_segments(q, q->max_hw_segments - 1);
}
+
+ if (dev->flags & ATA_DFLAG_NCQ) {
+ int depth;
+
+ depth = min(sdev->host->can_queue, ata_id_queue_depth(dev->id));
+ depth = min(ATA_MAX_QUEUE - 1, depth);
+ scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, depth);
+ }
}
/**
return 0; /* scsi layer doesn't check return value, sigh */
}
+/**
+ * ata_scsi_change_queue_depth - SCSI callback for queue depth config
+ * @sdev: SCSI device to configure queue depth for
+ * @queue_depth: new queue depth
+ *
+ * This is libata standard hostt->change_queue_depth callback.
+ * SCSI will call into this callback when user tries to set queue
+ * depth via sysfs.
+ *
+ * LOCKING:
+ * SCSI layer (we don't care)
+ *
+ * RETURNS:
+ * Newly configured queue depth.
+ */
+int ata_scsi_change_queue_depth(struct scsi_device *sdev, int queue_depth)
+{
+ struct ata_port *ap = ata_shost_to_port(sdev->host);
+ struct ata_device *dev;
+ int max_depth;
+
+ if (queue_depth < 1)
+ return sdev->queue_depth;
+
+ dev = ata_scsi_find_dev(ap, sdev);
+ if (!dev || !ata_dev_enabled(dev))
+ return sdev->queue_depth;
+
+ max_depth = min(sdev->host->can_queue, ata_id_queue_depth(dev->id));
+ max_depth = min(ATA_MAX_QUEUE - 1, max_depth);
+ if (queue_depth > max_depth)
+ queue_depth = max_depth;
+
+ scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG, queue_depth);
+ return queue_depth;
+}
+
/**
* ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command
* @qc: Storage for translated ATA taskfile
tf->nsect = 1; /* 1 sector, lba=0 */
if (qc->dev->flags & ATA_DFLAG_LBA) {
- qc->tf.flags |= ATA_TFLAG_LBA;
+ tf->flags |= ATA_TFLAG_LBA;
tf->lbah = 0x0;
tf->lbam = 0x0;
*/
goto nothing_to_do;
- if (dev->flags & ATA_DFLAG_LBA) {
+ if ((dev->flags & (ATA_DFLAG_PIO | ATA_DFLAG_NCQ)) == ATA_DFLAG_NCQ) {
+ /* yay, NCQ */
+ if (!lba_48_ok(block, n_block))
+ goto out_of_range;
+
+ tf->protocol = ATA_PROT_NCQ;
+ tf->flags |= ATA_TFLAG_LBA | ATA_TFLAG_LBA48;
+
+ if (tf->flags & ATA_TFLAG_WRITE)
+ tf->command = ATA_CMD_FPDMA_WRITE;
+ else
+ tf->command = ATA_CMD_FPDMA_READ;
+
+ qc->nsect = n_block;
+
+ tf->nsect = qc->tag << 3;
+ tf->hob_feature = (n_block >> 8) & 0xff;
+ tf->feature = n_block & 0xff;
+
+ tf->hob_lbah = (block >> 40) & 0xff;
+ tf->hob_lbam = (block >> 32) & 0xff;
+ tf->hob_lbal = (block >> 24) & 0xff;
+ tf->lbah = (block >> 16) & 0xff;
+ tf->lbam = (block >> 8) & 0xff;
+ tf->lbal = block & 0xff;
+
+ tf->device = 1 << 6;
+ if (tf->flags & ATA_TFLAG_FUA)
+ tf->device |= 1 << 7;
+ } else if (dev->flags & ATA_DFLAG_LBA) {
tf->flags |= ATA_TFLAG_LBA;
if (lba_28_ok(block, n_block)) {
*/
if (((cdb[0] == ATA_16) || (cdb[0] == ATA_12)) &&
((cdb[2] & 0x20) || need_sense)) {
- qc->ap->ops->tf_read(qc->ap, &qc->tf);
ata_gen_ata_desc_sense(qc);
} else {
if (!need_sense) {
cmd->result = SAM_STAT_GOOD;
} else {
- qc->ap->ops->tf_read(qc->ap, &qc->tf);
-
/* TODO: decide which descriptor format to use
* for 48b LBA devices and call that here
* instead of the fixed desc, which is only
}
}
- if (need_sense) {
- /* The ata_gen_..._sense routines fill in tf */
- ata_dump_status(qc->ap->id, &qc->tf);
- }
+ if (need_sense && !qc->ap->ops->error_handler)
+ ata_dump_status(qc->ap->id, &qc->result_tf);
qc->scsidone(cmd);
ata_qc_free(qc);
}
+/**
+ * ata_scmd_need_defer - Check whether we need to defer scmd
+ * @dev: ATA device to which the command is addressed
+ * @is_io: Is the command IO (and thus possibly NCQ)?
+ *
+ * NCQ and non-NCQ commands cannot run together. As upper layer
+ * only knows the queue depth, we are responsible for maintaining
+ * exclusion. This function checks whether a new command can be
+ * issued to @dev.
+ *
+ * LOCKING:
+ * spin_lock_irqsave(host_set lock)
+ *
+ * RETURNS:
+ * 1 if deferring is needed, 0 otherwise.
+ */
+static int ata_scmd_need_defer(struct ata_device *dev, int is_io)
+{
+ struct ata_port *ap = dev->ap;
+
+ if (!(dev->flags & ATA_DFLAG_NCQ))
+ return 0;
+
+ if (is_io) {
+ if (!ata_tag_valid(ap->active_tag))
+ return 0;
+ } else {
+ if (!ata_tag_valid(ap->active_tag) && !ap->sactive)
+ return 0;
+ }
+ return 1;
+}
+
/**
* ata_scsi_translate - Translate then issue SCSI command to ATA device
- * @ap: ATA port to which the command is addressed
* @dev: ATA device to which the command is addressed
* @cmd: SCSI command to execute
* @done: SCSI command completion function
*
* LOCKING:
* spin_lock_irqsave(host_set lock)
+ *
+ * RETURNS:
+ * 0 on success, SCSI_ML_QUEUE_DEVICE_BUSY if the command
+ * needs to be deferred.
*/
-
-static void ata_scsi_translate(struct ata_port *ap, struct ata_device *dev,
- struct scsi_cmnd *cmd,
+static int ata_scsi_translate(struct ata_device *dev, struct scsi_cmnd *cmd,
void (*done)(struct scsi_cmnd *),
ata_xlat_func_t xlat_func)
{
struct ata_queued_cmd *qc;
u8 *scsicmd = cmd->cmnd;
+ int is_io = xlat_func == ata_scsi_rw_xlat;
VPRINTK("ENTER\n");
- qc = ata_scsi_qc_new(ap, dev, cmd, done);
+ if (unlikely(ata_scmd_need_defer(dev, is_io)))
+ goto defer;
+
+ qc = ata_scsi_qc_new(dev, cmd, done);
if (!qc)
goto err_mem;
if (cmd->sc_data_direction == DMA_FROM_DEVICE ||
cmd->sc_data_direction == DMA_TO_DEVICE) {
if (unlikely(cmd->request_bufflen < 1)) {
- printk(KERN_WARNING "ata%u(%u): WARNING: zero len r/w req\n",
- ap->id, dev->devno);
+ ata_dev_printk(dev, KERN_WARNING,
+ "WARNING: zero len r/w req\n");
goto err_did;
}
ata_qc_issue(qc);
VPRINTK("EXIT\n");
- return;
+ return 0;
early_finish:
ata_qc_free(qc);
done(cmd);
DPRINTK("EXIT - early finish (good or error)\n");
- return;
+ return 0;
err_did:
ata_qc_free(qc);
cmd->result = (DID_ERROR << 16);
done(cmd);
DPRINTK("EXIT - internal\n");
- return;
+ return 0;
+
+defer:
+ DPRINTK("EXIT - defer\n");
+ return SCSI_MLQUEUE_DEVICE_BUSY;
}
/**
return 0;
dpofua = 0;
- if (ata_dev_supports_fua(args->id) && dev->flags & ATA_DFLAG_LBA48 &&
+ if (ata_dev_supports_fua(args->id) && (dev->flags & ATA_DFLAG_LBA48) &&
(!(dev->flags & ATA_DFLAG_PIO) || dev->multi_count))
dpofua = 1 << 4;
* a sense descriptors, since that's only
* correct for ATA, not ATAPI
*/
- qc->ap->ops->tf_read(qc->ap, &qc->tf);
ata_gen_ata_desc_sense(qc);
}
VPRINTK("ENTER, err_mask 0x%X\n", err_mask);
+ /* handle completion from new EH */
+ if (unlikely(qc->ap->ops->error_handler &&
+ (err_mask || qc->flags & ATA_QCFLAG_SENSE_VALID))) {
+
+ if (!(qc->flags & ATA_QCFLAG_SENSE_VALID)) {
+ /* FIXME: not quite right; we don't want the
+ * translation of taskfile registers into a
+ * sense descriptors, since that's only
+ * correct for ATA, not ATAPI
+ */
+ ata_gen_ata_desc_sense(qc);
+ }
+
+ qc->scsicmd->result = SAM_STAT_CHECK_CONDITION;
+ qc->scsidone(cmd);
+ ata_qc_free(qc);
+ return;
+ }
+
+ /* successful completion or old EH failure path */
if (unlikely(err_mask & AC_ERR_DEV)) {
cmd->result = SAM_STAT_CHECK_CONDITION;
atapi_request_sense(qc);
* a sense descriptors, since that's only
* correct for ATA, not ATAPI
*/
- qc->ap->ops->tf_read(qc->ap, &qc->tf);
ata_gen_ata_desc_sense(qc);
} else {
u8 *scsicmd = cmd->cmnd;
if (!atapi_enabled || (ap->flags & ATA_FLAG_NO_ATAPI)) {
if (unlikely(dev->class == ATA_DEV_ATAPI)) {
- printk(KERN_WARNING "ata%u(%u): WARNING: ATAPI is %s, device ignored.\n",
- ap->id, dev->devno, atapi_enabled ? "not supported with this driver" : "disabled");
+ ata_dev_printk(dev, KERN_WARNING,
+ "WARNING: ATAPI is %s, device ignored.\n",
+ atapi_enabled ? "not supported with this driver" : "disabled");
return NULL;
}
}
{
struct ata_taskfile *tf = &(qc->tf);
struct scsi_cmnd *cmd = qc->scsicmd;
+ struct ata_device *dev = qc->dev;
if ((tf->protocol = ata_scsi_map_proto(scsicmd[1])) == ATA_PROT_UNKNOWN)
goto invalid_fld;
+ /* We may not issue DMA commands if no DMA mode is set */
+ if (tf->protocol == ATA_PROT_DMA && dev->dma_mode == 0)
+ goto invalid_fld;
+
if (scsicmd[1] & 0xe0)
/* PIO multi not supported yet */
goto invalid_fld;
*/
qc->nsect = cmd->bufflen / ATA_SECT_SIZE;
+ /* request result TF */
+ qc->flags |= ATA_QCFLAG_RESULT_TF;
+
return 0;
invalid_fld:
#endif
}
-static inline void __ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *),
- struct ata_port *ap, struct ata_device *dev)
+static inline int __ata_scsi_queuecmd(struct scsi_cmnd *cmd,
+ void (*done)(struct scsi_cmnd *),
+ struct ata_device *dev)
{
+ int rc = 0;
+
if (dev->class == ATA_DEV_ATA) {
ata_xlat_func_t xlat_func = ata_get_xlat_func(dev,
cmd->cmnd[0]);
if (xlat_func)
- ata_scsi_translate(ap, dev, cmd, done, xlat_func);
+ rc = ata_scsi_translate(dev, cmd, done, xlat_func);
else
- ata_scsi_simulate(ap, dev, cmd, done);
+ ata_scsi_simulate(dev, cmd, done);
} else
- ata_scsi_translate(ap, dev, cmd, done, atapi_xlat);
+ rc = ata_scsi_translate(dev, cmd, done, atapi_xlat);
+
+ return rc;
}
/**
* Releases scsi-layer-held lock, and obtains host_set lock.
*
* RETURNS:
- * Zero.
+ * Return value from __ata_scsi_queuecmd() if @cmd can be queued,
+ * 0 otherwise.
*/
-
int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *))
{
struct ata_port *ap;
struct ata_device *dev;
struct scsi_device *scsidev = cmd->device;
struct Scsi_Host *shost = scsidev->host;
+ int rc = 0;
ap = ata_shost_to_port(shost);
dev = ata_scsi_find_dev(ap, scsidev);
if (likely(dev))
- __ata_scsi_queuecmd(cmd, done, ap, dev);
+ rc = __ata_scsi_queuecmd(cmd, done, dev);
else {
cmd->result = (DID_BAD_TARGET << 16);
done(cmd);
spin_unlock(&ap->host_set->lock);
spin_lock(shost->host_lock);
- return 0;
+ return rc;
}
/**
* ata_scsi_simulate - simulate SCSI command on ATA device
- * @ap: port the device is connected to
* @dev: the target device
* @cmd: SCSI command being sent to device.
* @done: SCSI command completion function.
* spin_lock_irqsave(host_set lock)
*/
-void ata_scsi_simulate(struct ata_port *ap, struct ata_device *dev,
- struct scsi_cmnd *cmd,
+void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd,
void (*done)(struct scsi_cmnd *))
{
struct ata_scsi_args args;
const u8 *scsicmd = cmd->cmnd;
- args.ap = ap;
args.dev = dev;
args.id = dev->id;
args.cmd = cmd;
scsi_scan_target(&ap->host->shost_gendev, 0, i, 0, 0);
}
}
-
projects / linux-2.6-omap-h63xx.git / blobdiff