This removes the request types and hacks from the block code and into the
old IDE driver. There is a small amunt of code duplication due to this,
but it's not too bad.
Signed-off-by: Christoph Hellwig <hch@xxxxxx>
---
block/blk-core.c | 1 +
block/blk-exec.c | 10 ---------
block/blk.h | 2 --
drivers/ide/ide-eh.c | 2 +-
drivers/ide/ide-io.c | 8 +++----
drivers/ide/ide-pm.c | 56 +++++++++++++++++++++++++++++++++++-----------
drivers/ide/ide-taskfile.c | 2 +-
include/linux/blkdev.h | 21 +----------------
include/linux/ide.h | 19 ++++++++++++++++
9 files changed, 70 insertions(+), 51 deletions(-)
diff --git a/block/blk-core.c b/block/blk-core.c
index fd154b9..2e5020f 100644
--- a/block/blk-core.c
+++ b/block/blk-core.c
@@ -285,6 +285,7 @@ inline void __blk_run_queue_uncond(struct request_queue *q)
q->request_fn(q);
q->request_fn_active--;
}
+EXPORT_SYMBOL_GPL(__blk_run_queue_uncond);
/**
* __blk_run_queue - run a single device queue
diff --git a/block/blk-exec.c b/block/blk-exec.c
index 9924725..3fec8a2 100644
--- a/block/blk-exec.c
+++ b/block/blk-exec.c
@@ -53,7 +53,6 @@ void blk_execute_rq_nowait(struct request_queue *q, struct gendisk *bd_disk,
rq_end_io_fn *done)
{
int where = at_head ? ELEVATOR_INSERT_FRONT : ELEVATOR_INSERT_BACK;
- bool is_pm_resume;
WARN_ON(irqs_disabled());
WARN_ON(rq->cmd_type == REQ_TYPE_FS);
@@ -70,12 +69,6 @@ void blk_execute_rq_nowait(struct request_queue *q, struct gendisk *bd_disk,
return;
}
- /*
- * need to check this before __blk_run_queue(), because rq can
- * be freed before that returns.
- */
- is_pm_resume = rq->cmd_type == REQ_TYPE_PM_RESUME;
-
spin_lock_irq(q->queue_lock);
if (unlikely(blk_queue_dying(q))) {
@@ -88,9 +81,6 @@ void blk_execute_rq_nowait(struct request_queue *q, struct gendisk *bd_disk,
__elv_add_request(q, rq, where);
__blk_run_queue(q);
- /* the queue is stopped so it won't be run */
- if (is_pm_resume)
- __blk_run_queue_uncond(q);
spin_unlock_irq(q->queue_lock);
}
EXPORT_SYMBOL_GPL(blk_execute_rq_nowait);
diff --git a/block/blk.h b/block/blk.h
index 43b0361..4b48d55 100644
--- a/block/blk.h
+++ b/block/blk.h
@@ -193,8 +193,6 @@ int blk_try_merge(struct request *rq, struct bio *bio);
void blk_queue_congestion_threshold(struct request_queue *q);
-void __blk_run_queue_uncond(struct request_queue *q);
-
int blk_dev_init(void);
diff --git a/drivers/ide/ide-eh.c b/drivers/ide/ide-eh.c
index 19d809c..d6da011 100644
--- a/drivers/ide/ide-eh.c
+++ b/drivers/ide/ide-eh.c
@@ -129,7 +129,7 @@ ide_startstop_t ide_error(ide_drive_t *drive, const char *msg, u8 stat)
if (cmd)
ide_complete_cmd(drive, cmd, stat, err);
- } else if (blk_pm_request(rq)) {
+ } else if (ata_pm_request(rq)) {
rq->errors = 1;
ide_complete_pm_rq(drive, rq);
return ide_stopped;
diff --git a/drivers/ide/ide-io.c b/drivers/ide/ide-io.c
index 8e55abd..669ea1e 100644
--- a/drivers/ide/ide-io.c
+++ b/drivers/ide/ide-io.c
@@ -320,7 +320,7 @@ static ide_startstop_t start_request (ide_drive_t *drive, struct request *rq)
goto kill_rq;
}
- if (blk_pm_request(rq))
+ if (ata_pm_request(rq))
ide_check_pm_state(drive, rq);
drive->hwif->tp_ops->dev_select(drive);
@@ -342,8 +342,8 @@ static ide_startstop_t start_request (ide_drive_t *drive, struct request *rq)
if (rq->cmd_type == REQ_TYPE_ATA_TASKFILE)
return execute_drive_cmd(drive, rq);
- else if (blk_pm_request(rq)) {
- struct request_pm_state *pm = rq->special;
+ else if (ata_pm_request(rq)) {
+ struct ide_pm_state *pm = rq->special;
#ifdef DEBUG_PM
printk("%s: start_power_step(step: %d)\n",
drive->name, pm->pm_step);
@@ -538,7 +538,7 @@ repeat:
* state machine.
*/
if ((drive->dev_flags & IDE_DFLAG_BLOCKED) &&
- blk_pm_request(rq) == 0 &&
+ ata_pm_request(rq) == 0 &&
(rq->cmd_flags & REQ_PREEMPT) == 0) {
/* there should be no pending command at this point */
ide_unlock_port(hwif);
diff --git a/drivers/ide/ide-pm.c b/drivers/ide/ide-pm.c
index 8d1e32d..6a8bfed 100644
--- a/drivers/ide/ide-pm.c
+++ b/drivers/ide/ide-pm.c
@@ -8,7 +8,7 @@ int generic_ide_suspend(struct device *dev, pm_message_t mesg)
ide_drive_t *pair = ide_get_pair_dev(drive);
ide_hwif_t *hwif = drive->hwif;
struct request *rq;
- struct request_pm_state rqpm;
+ struct ide_pm_state rqpm;
int ret;
if (ide_port_acpi(hwif)) {
@@ -19,7 +19,7 @@ int generic_ide_suspend(struct device *dev, pm_message_t mesg)
memset(&rqpm, 0, sizeof(rqpm));
rq = blk_get_request(drive->queue, READ, __GFP_WAIT);
- rq->cmd_type = REQ_TYPE_PM_SUSPEND;
+ rq->cmd_type = REQ_TYPE_ATA_PM_SUSPEND;
rq->special = &rqpm;
rqpm.pm_step = IDE_PM_START_SUSPEND;
if (mesg.event == PM_EVENT_PRETHAW)
@@ -38,13 +38,43 @@ int generic_ide_suspend(struct device *dev, pm_message_t mesg)
return ret;
}
+static void ide_end_sync_rq(struct request *rq, int error)
+{
+ complete(rq->end_io_data);
+}
+
+static int ide_pm_execute_rq(struct request *rq)
+{
+ struct request_queue *q = rq->q;
+ DECLARE_COMPLETION_ONSTACK(wait);
+
+ rq->end_io_data = &wait;
+ rq->end_io = ide_end_sync_rq;
+
+ spin_lock_irq(q->queue_lock);
+ if (unlikely(blk_queue_dying(q))) {
+ rq->cmd_flags |= REQ_QUIET;
+ rq->errors = -ENXIO;
+ __blk_end_request_all(rq, rq->errors);
+ spin_unlock_irq(q->queue_lock);
+ return -ENXIO;
+ }
+ __elv_add_request(q, rq, ELEVATOR_INSERT_FRONT);
+ __blk_run_queue_uncond(q);
+ spin_unlock_irq(q->queue_lock);
+
+ wait_for_completion_io(&wait);
+
+ return rq->errors ? -EIO : 0;
+}
+
int generic_ide_resume(struct device *dev)
{
ide_drive_t *drive = to_ide_device(dev);
ide_drive_t *pair = ide_get_pair_dev(drive);
ide_hwif_t *hwif = drive->hwif;
struct request *rq;
- struct request_pm_state rqpm;
+ struct ide_pm_state rqpm;
int err;
if (ide_port_acpi(hwif)) {
@@ -59,13 +89,13 @@ int generic_ide_resume(struct device *dev)
memset(&rqpm, 0, sizeof(rqpm));
rq = blk_get_request(drive->queue, READ, __GFP_WAIT);
- rq->cmd_type = REQ_TYPE_PM_RESUME;
+ rq->cmd_type = REQ_TYPE_ATA_PM_RESUME;
rq->cmd_flags |= REQ_PREEMPT;
rq->special = &rqpm;
rqpm.pm_step = IDE_PM_START_RESUME;
rqpm.pm_state = PM_EVENT_ON;
- err = blk_execute_rq(drive->queue, NULL, rq, 1);
+ err = ide_pm_execute_rq(rq);
blk_put_request(rq);
if (err == 0 && dev->driver) {
@@ -80,7 +110,7 @@ int generic_ide_resume(struct device *dev)
void ide_complete_power_step(ide_drive_t *drive, struct request *rq)
{
- struct request_pm_state *pm = rq->special;
+ struct ide_pm_state *pm = rq->special;
#ifdef DEBUG_PM
printk(KERN_INFO "%s: complete_power_step(step: %d)\n",
@@ -110,7 +140,7 @@ void ide_complete_power_step(ide_drive_t *drive, struct request *rq)
ide_startstop_t ide_start_power_step(ide_drive_t *drive, struct request *rq)
{
- struct request_pm_state *pm = rq->special;
+ struct ide_pm_state *pm = rq->special;
struct ide_cmd cmd = { };
switch (pm->pm_step) {
@@ -182,7 +212,7 @@ out_do_tf:
void ide_complete_pm_rq(ide_drive_t *drive, struct request *rq)
{
struct request_queue *q = drive->queue;
- struct request_pm_state *pm = rq->special;
+ struct ide_pm_state *pm = rq->special;
unsigned long flags;
ide_complete_power_step(drive, rq);
@@ -191,10 +221,10 @@ void ide_complete_pm_rq(ide_drive_t *drive, struct request *rq)
#ifdef DEBUG_PM
printk("%s: completing PM request, %s\n", drive->name,
- (rq->cmd_type == REQ_TYPE_PM_SUSPEND) ? "suspend" : "resume");
+ (rq->cmd_type == REQ_TYPE_ATA_PM_SUSPEND) ? "suspend" : "resume");
#endif
spin_lock_irqsave(q->queue_lock, flags);
- if (rq->cmd_type == REQ_TYPE_PM_SUSPEND)
+ if (rq->cmd_type == REQ_TYPE_ATA_PM_SUSPEND)
blk_stop_queue(q);
else
drive->dev_flags &= ~IDE_DFLAG_BLOCKED;
@@ -208,13 +238,13 @@ void ide_complete_pm_rq(ide_drive_t *drive, struct request *rq)
void ide_check_pm_state(ide_drive_t *drive, struct request *rq)
{
- struct request_pm_state *pm = rq->special;
+ struct ide_pm_state *pm = rq->special;
- if (rq->cmd_type == REQ_TYPE_PM_SUSPEND &&
+ if (rq->cmd_type == REQ_TYPE_ATA_PM_SUSPEND &&
pm->pm_step == IDE_PM_START_SUSPEND)
/* Mark drive blocked when starting the suspend sequence. */
drive->dev_flags |= IDE_DFLAG_BLOCKED;
- else if (rq->cmd_type == REQ_TYPE_PM_RESUME &&
+ else if (rq->cmd_type == REQ_TYPE_ATA_PM_RESUME &&
pm->pm_step == IDE_PM_START_RESUME) {
/*
* The first thing we do on wakeup is to wait for BSY bit to
diff --git a/drivers/ide/ide-taskfile.c b/drivers/ide/ide-taskfile.c
index dabb88b..0979e12 100644
--- a/drivers/ide/ide-taskfile.c
+++ b/drivers/ide/ide-taskfile.c
@@ -186,7 +186,7 @@ static ide_startstop_t task_no_data_intr(ide_drive_t *drive)
tf->command == ATA_CMD_CHK_POWER) {
struct request *rq = hwif->rq;
- if (blk_pm_request(rq))
+ if (ata_pm_request(rq))
ide_complete_pm_rq(drive, rq);
else
ide_finish_cmd(drive, cmd, stat);
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index c2829ba..2da818a 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -30,7 +30,6 @@ struct scsi_ioctl_command;
struct request_queue;
struct elevator_queue;
-struct request_pm_state;
struct blk_trace;
struct request;
struct sg_io_hdr;
@@ -75,8 +74,6 @@ struct request_list {
enum rq_cmd_type_bits {
REQ_TYPE_FS = 1, /* fs request */
REQ_TYPE_BLOCK_PC, /* scsi command */
- REQ_TYPE_PM_SUSPEND, /* suspend request */
- REQ_TYPE_PM_RESUME, /* resume request */
REQ_TYPE_DRV_PRIV, /* driver defined types from here */
};
@@ -207,19 +204,6 @@ static inline unsigned short req_get_ioprio(struct request *req)
return req->ioprio;
}
-/*
- * State information carried for REQ_TYPE_PM_SUSPEND and REQ_TYPE_PM_RESUME
- * requests. Some step values could eventually be made generic.
- */
-struct request_pm_state
-{
- /* PM state machine step value, currently driver specific */
- int pm_step;
- /* requested PM state value (S1, S2, S3, S4, ...) */
- u32 pm_state;
- void* data; /* for driver use */
-};
-
#include <linux/elevator.h>
struct blk_queue_ctx;
@@ -601,10 +585,6 @@ static inline void queue_flag_clear(unsigned int flag, struct request_queue *q)
(((rq)->cmd_flags & REQ_STARTED) && \
((rq)->cmd_type == REQ_TYPE_FS))
-#define blk_pm_request(rq) \
- ((rq)->cmd_type == REQ_TYPE_PM_SUSPEND || \
- (rq)->cmd_type == REQ_TYPE_PM_RESUME)
-
#define blk_rq_cpu_valid(rq) ((rq)->cpu != -1)
#define blk_bidi_rq(rq) ((rq)->next_rq != NULL)
/* rq->queuelist of dequeued request must be list_empty() */
@@ -838,6 +818,7 @@ extern void blk_stop_queue(struct request_queue *q);
extern void blk_sync_queue(struct request_queue *q);
extern void __blk_stop_queue(struct request_queue *q);
extern void __blk_run_queue(struct request_queue *q);
+extern void __blk_run_queue_uncond(struct request_queue *q);
extern void blk_run_queue(struct request_queue *);
extern void blk_run_queue_async(struct request_queue *q);
extern int blk_rq_map_user(struct request_queue *, struct request *,
diff --git a/include/linux/ide.h b/include/linux/ide.h
index 9856b7d..a633898 100644
--- a/include/linux/ide.h
+++ b/include/linux/ide.h
@@ -44,8 +44,14 @@ enum ata_cmd_type_bits {
REQ_TYPE_ATA_TASKFILE = REQ_TYPE_DRV_PRIV + 1,
REQ_TYPE_ATA_PC,
REQ_TYPE_ATA_SENSE, /* sense request */
+ REQ_TYPE_ATA_PM_SUSPEND,/* suspend request */
+ REQ_TYPE_ATA_PM_RESUME, /* resume request */
};
+#define ata_pm_request(rq) \
+ ((rq)->cmd_type == REQ_TYPE_ATA_PM_SUSPEND || \
+ (rq)->cmd_type == REQ_TYPE_ATA_PM_RESUME)
+
/* Error codes returned in rq->errors to the higher part of the driver. */
enum {
IDE_DRV_ERROR_GENERAL = 101,
@@ -1321,6 +1327,19 @@ struct ide_port_info {
u8 udma_mask;
};
+/*
+ * State information carried for REQ_TYPE_ATA_PM_SUSPEND and REQ_TYPE_ATA_PM_RESUME
+ * requests.
+ */
+struct ide_pm_state {
+ /* PM state machine step value, currently driver specific */
+ int pm_step;
+ /* requested PM state value (S1, S2, S3, S4, ...) */
+ u32 pm_state;
+ void* data; /* for driver use */
+};
+
+
int ide_pci_init_one(struct pci_dev *, const struct ide_port_info *, void *);
int ide_pci_init_two(struct pci_dev *, struct pci_dev *,
const struct ide_port_info *, void *);
--
1.9.1
--
To unsubscribe from this list: send the line "unsubscribe linux-scsi" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
