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ide: don't abuse cmd_type 

Currently the legacy ide driver defines several request types of it's own,
which is in the way of removing that field entirely.

Instead add a type field to struct ide_request and use that to distinguish
the different types of IDE-internal requests.

It's a bit of a mess, but so is the surrounding code..

Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Jens Axboe <axboe@fb.com>
This commit is contained in:
Christoph Hellwig 2017-01-31 16:57:30 +01:00 коммит произвёл Jens Axboe
Родитель 57292b58dd
Коммит 2f5a8e80f7
14 изменённых файлов: 117 добавлений и 51 удалений
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18
drivers/ide/ide-atapi.c
Просмотреть файл

@ -95,6 +95,7 @@ int ide_queue_pc_tail(ide_drive_t *drive, struct gendisk *disk,
rq = blk_get_request(drive->queue, READ, __GFP_RECLAIM);
scsi_req_init(rq);
rq->cmd_type = REQ_TYPE_DRV_PRIV;
ide_req(rq)->type = ATA_PRIV_MISC;
rq->special = (char *)pc;
if (buf && bufflen) {
@ -193,7 +194,7 @@ void ide_prep_sense(ide_drive_t *drive, struct request *rq)
BUG_ON(sense_len > sizeof(*sense));
if (rq->cmd_type == REQ_TYPE_ATA_SENSE || drive->sense_rq_armed)
if (ata_sense_request(rq) || drive->sense_rq_armed)
return;
memset(sense, 0, sizeof(*sense));
@ -211,7 +212,8 @@ void ide_prep_sense(ide_drive_t *drive, struct request *rq)
}
sense_rq->rq_disk = rq->rq_disk;
sense_rq->cmd_type = REQ_TYPE_ATA_SENSE;
sense_rq->cmd_type = REQ_TYPE_DRV_PRIV;
ide_req(sense_rq)->type = ATA_PRIV_SENSE;
sense_rq->rq_flags |= RQF_PREEMPT;
req->cmd[0] = GPCMD_REQUEST_SENSE;
@ -313,10 +315,14 @@ int ide_cd_get_xferlen(struct request *rq)
switch (rq->cmd_type) {
case REQ_TYPE_FS:
return 32768;
case REQ_TYPE_ATA_SENSE:
case REQ_TYPE_BLOCK_PC:
case REQ_TYPE_ATA_PC:
return blk_rq_bytes(rq);
case REQ_TYPE_DRV_PRIV:
switch (ide_req(rq)->type) {
case ATA_PRIV_PC:
case ATA_PRIV_SENSE:
return blk_rq_bytes(rq);
}
default:
return 0;
}
@ -377,7 +383,7 @@ int ide_check_ireason(ide_drive_t *drive, struct request *rq, int len,
drive->name, __func__, ireason);
}
if (dev_is_idecd(drive) && rq->cmd_type == REQ_TYPE_ATA_PC)
if (dev_is_idecd(drive) && ata_pc_request(rq))
rq->rq_flags |= RQF_FAILED;
return 1;
@ -480,7 +486,7 @@ static ide_startstop_t ide_pc_intr(ide_drive_t *drive)
if (uptodate == 0)
drive->failed_pc = NULL;
if (rq->cmd_type == REQ_TYPE_DRV_PRIV) {
if (ata_misc_request(rq)) {
rq->errors = 0;
error = 0;
} else {

25
drivers/ide/ide-cd.c
Просмотреть файл

@ -210,7 +210,7 @@ static void cdrom_analyze_sense_data(ide_drive_t *drive,
static void ide_cd_complete_failed_rq(ide_drive_t *drive, struct request *rq)
{
/*
* For REQ_TYPE_ATA_SENSE, "rq->special" points to the original
* For ATA_PRIV_SENSE, "rq->special" points to the original
* failed request. Also, the sense data should be read
* directly from rq which might be different from the original
* sense buffer if it got copied during mapping.
@ -282,7 +282,7 @@ static int cdrom_decode_status(ide_drive_t *drive, u8 stat)
"stat 0x%x",
rq->cmd[0], rq->cmd_type, err, stat);
if (rq->cmd_type == REQ_TYPE_ATA_SENSE) {
if (ata_sense_request(rq)) {
/*
* We got an error trying to get sense info from the drive
* (probably while trying to recover from a former error).
@ -438,7 +438,8 @@ int ide_cd_queue_pc(ide_drive_t *drive, const unsigned char *cmd,
rq = blk_get_request(drive->queue, write, __GFP_RECLAIM);
scsi_req_init(rq);
memcpy(scsi_req(rq)->cmd, cmd, BLK_MAX_CDB);
rq->cmd_type = REQ_TYPE_ATA_PC;
rq->cmd_type = REQ_TYPE_DRV_PRIV;
ide_req(rq)->type = ATA_PRIV_PC;
rq->rq_flags |= rq_flags;
rq->timeout = timeout;
if (buffer) {
@ -520,7 +521,7 @@ static ide_startstop_t cdrom_newpc_intr(ide_drive_t *drive)
ide_expiry_t *expiry = NULL;
int dma_error = 0, dma, thislen, uptodate = 0;
int write = (rq_data_dir(rq) == WRITE) ? 1 : 0, rc = 0;
int sense = (rq->cmd_type == REQ_TYPE_ATA_SENSE);
int sense = ata_sense_request(rq);
unsigned int timeout;
u16 len;
u8 ireason, stat;
@ -785,18 +786,22 @@ static ide_startstop_t ide_cd_do_request(ide_drive_t *drive, struct request *rq,
if (cdrom_start_rw(drive, rq) == ide_stopped)
goto out_end;
break;
case REQ_TYPE_ATA_SENSE:
case REQ_TYPE_BLOCK_PC:
case REQ_TYPE_ATA_PC:
handle_pc:
if (!rq->timeout)
rq->timeout = ATAPI_WAIT_PC;
cdrom_do_block_pc(drive, rq);
break;
case REQ_TYPE_DRV_PRIV:
/* right now this can only be a reset... */
uptodate = 1;
goto out_end;
switch (ide_req(rq)->type) {
case ATA_PRIV_MISC:
/* right now this can only be a reset... */
uptodate = 1;
goto out_end;
case ATA_PRIV_SENSE:
case ATA_PRIV_PC:
goto handle_pc;
}
default:
BUG();
}

1
drivers/ide/ide-cd_ioctl.c
Просмотреть файл

@ -306,6 +306,7 @@ int ide_cdrom_reset(struct cdrom_device_info *cdi)
rq = blk_get_request(drive->queue, READ, __GFP_RECLAIM);
scsi_req_init(rq);
rq->cmd_type = REQ_TYPE_DRV_PRIV;
ide_req(rq)->type = ATA_PRIV_MISC;
rq->rq_flags = RQF_QUIET;
ret = blk_execute_rq(drive->queue, cd->disk, rq, 0);
blk_put_request(rq);

1
drivers/ide/ide-devsets.c
Просмотреть файл

@ -168,6 +168,7 @@ int ide_devset_execute(ide_drive_t *drive, const struct ide_devset *setting,
rq = blk_get_request(q, READ, __GFP_RECLAIM);
scsi_req_init(rq);
rq->cmd_type = REQ_TYPE_DRV_PRIV;
ide_req(rq)->type = ATA_PRIV_MISC;
scsi_req(rq)->cmd_len = 5;
scsi_req(rq)->cmd[0] = REQ_DEVSET_EXEC;
*(int *)&scsi_req(rq)->cmd[1] = arg;

6
drivers/ide/ide-disk.c
Просмотреть файл

@ -453,7 +453,8 @@ static int idedisk_prep_fn(struct request_queue *q, struct request *rq)
cmd->tf_flags = IDE_TFLAG_DYN;
cmd->protocol = ATA_PROT_NODATA;
rq->cmd_type = REQ_TYPE_ATA_TASKFILE;
rq->cmd_type = REQ_TYPE_DRV_PRIV;
ide_req(rq)->type = ATA_PRIV_TASKFILE;
rq->special = cmd;
cmd->rq = rq;
@ -479,7 +480,8 @@ static int set_multcount(ide_drive_t *drive, int arg)
rq = blk_get_request(drive->queue, READ, __GFP_RECLAIM);
scsi_req_init(rq);
rq->cmd_type = REQ_TYPE_ATA_TASKFILE;
rq->cmd_type = REQ_TYPE_DRV_PRIV;
ide_req(rq)->type = ATA_PRIV_TASKFILE;
drive->mult_req = arg;
drive->special_flags |= IDE_SFLAG_SET_MULTMODE;

4
drivers/ide/ide-eh.c
Просмотреть файл

@ -124,7 +124,7 @@ ide_startstop_t ide_error(ide_drive_t *drive, const char *msg, u8 stat)
/* retry only "normal" I/O: */
if (rq->cmd_type != REQ_TYPE_FS) {
if (rq->cmd_type == REQ_TYPE_ATA_TASKFILE) {
if (ata_taskfile_request(rq)) {
struct ide_cmd *cmd = rq->special;
if (cmd)
@ -147,7 +147,7 @@ static inline void ide_complete_drive_reset(ide_drive_t *drive, int err)
{
struct request *rq = drive->hwif->rq;
if (rq && rq->cmd_type == REQ_TYPE_DRV_PRIV &&
if (rq && ata_misc_request(rq) &&
scsi_req(rq)->cmd[0] == REQ_DRIVE_RESET) {
if (err <= 0 && rq->errors == 0)
rq->errors = -EIO;

18
drivers/ide/ide-floppy.c
Просмотреть файл

@ -97,7 +97,7 @@ static int ide_floppy_callback(ide_drive_t *drive, int dsc)
"Aborting request!\n");
}
if (rq->cmd_type == REQ_TYPE_DRV_PRIV)
if (ata_misc_request(rq))
rq->errors = uptodate ? 0 : IDE_DRV_ERROR_GENERAL;
return uptodate;
@ -246,7 +246,7 @@ static ide_startstop_t ide_floppy_do_request(ide_drive_t *drive,
} else
printk(KERN_ERR PFX "%s: I/O error\n", drive->name);
if (rq->cmd_type == REQ_TYPE_DRV_PRIV) {
if (ata_misc_request(rq)) {
rq->errors = 0;
ide_complete_rq(drive, 0, blk_rq_bytes(rq));
return ide_stopped;
@ -265,14 +265,20 @@ static ide_startstop_t ide_floppy_do_request(ide_drive_t *drive,
pc = &floppy->queued_pc;
idefloppy_create_rw_cmd(drive, pc, rq, (unsigned long)block);
break;
case REQ_TYPE_DRV_PRIV:
case REQ_TYPE_ATA_SENSE:
pc = (struct ide_atapi_pc *)rq->special;
break;
case REQ_TYPE_BLOCK_PC:
pc = &floppy->queued_pc;
idefloppy_blockpc_cmd(floppy, pc, rq);
break;
case REQ_TYPE_DRV_PRIV:
switch (ide_req(rq)->type) {
case ATA_PRIV_MISC:
case ATA_PRIV_SENSE:
pc = (struct ide_atapi_pc *)rq->special;
break;
default:
BUG();
}
break;
default:
BUG();
}

8
drivers/ide/ide-io.c
Просмотреть файл

@ -102,7 +102,7 @@ void ide_complete_cmd(ide_drive_t *drive, struct ide_cmd *cmd, u8 stat, u8 err)
drive->dev_flags |= IDE_DFLAG_PARKED;
}
if (rq && rq->cmd_type == REQ_TYPE_ATA_TASKFILE) {
if (rq && ata_taskfile_request(rq)) {
struct ide_cmd *orig_cmd = rq->special;
if (cmd->tf_flags & IDE_TFLAG_DYN)
@ -135,7 +135,7 @@ EXPORT_SYMBOL(ide_complete_rq);
void ide_kill_rq(ide_drive_t *drive, struct request *rq)
{
u8 drv_req = (rq->cmd_type == REQ_TYPE_DRV_PRIV) && rq->rq_disk;
u8 drv_req = ata_misc_request(rq) && rq->rq_disk;
u8 media = drive->media;
drive->failed_pc = NULL;
@ -340,7 +340,7 @@ static ide_startstop_t start_request (ide_drive_t *drive, struct request *rq)
if (drive->current_speed == 0xff)
ide_config_drive_speed(drive, drive->desired_speed);
if (rq->cmd_type == REQ_TYPE_ATA_TASKFILE)
if (ata_taskfile_request(rq))
return execute_drive_cmd(drive, rq);
else if (ata_pm_request(rq)) {
struct ide_pm_state *pm = rq->special;
@ -353,7 +353,7 @@ static ide_startstop_t start_request (ide_drive_t *drive, struct request *rq)
pm->pm_step == IDE_PM_COMPLETED)
ide_complete_pm_rq(drive, rq);
return startstop;
} else if (!rq->rq_disk && rq->cmd_type == REQ_TYPE_DRV_PRIV)
} else if (!rq->rq_disk && ata_misc_request(rq))
/*
* TODO: Once all ULDs have been modified to
* check for specific op codes rather than

4
drivers/ide/ide-ioctls.c
Просмотреть файл

@ -127,7 +127,8 @@ static int ide_cmd_ioctl(ide_drive_t *drive, unsigned long arg)
rq = blk_get_request(drive->queue, READ, __GFP_RECLAIM);
scsi_req_init(rq);
rq->cmd_type = REQ_TYPE_ATA_TASKFILE;
rq->cmd_type = REQ_TYPE_DRV_PRIV;
ide_req(rq)->type = ATA_PRIV_TASKFILE;
err = blk_execute_rq(drive->queue, NULL, rq, 0);
blk_put_request(rq);
@ -225,6 +226,7 @@ static int generic_drive_reset(ide_drive_t *drive)
rq = blk_get_request(drive->queue, READ, __GFP_RECLAIM);
scsi_req_init(rq);
rq->cmd_type = REQ_TYPE_DRV_PRIV;
ide_req(rq)->type = ATA_PRIV_MISC;
scsi_req(rq)->cmd_len = 1;
scsi_req(rq)->cmd[0] = REQ_DRIVE_RESET;
if (blk_execute_rq(drive->queue, NULL, rq, 1))

2
drivers/ide/ide-park.c
Просмотреть файл

@ -36,6 +36,7 @@ static void issue_park_cmd(ide_drive_t *drive, unsigned long timeout)
scsi_req(rq)->cmd[0] = REQ_PARK_HEADS;
scsi_req(rq)->cmd_len = 1;
rq->cmd_type = REQ_TYPE_DRV_PRIV;
ide_req(rq)->type = ATA_PRIV_MISC;
rq->special = &timeout;
rc = blk_execute_rq(q, NULL, rq, 1);
blk_put_request(rq);
@ -54,6 +55,7 @@ static void issue_park_cmd(ide_drive_t *drive, unsigned long timeout)
scsi_req(rq)->cmd[0] = REQ_UNPARK_HEADS;
scsi_req(rq)->cmd_len = 1;
rq->cmd_type = REQ_TYPE_DRV_PRIV;
ide_req(rq)->type = ATA_PRIV_MISC;
elv_add_request(q, rq, ELEVATOR_INSERT_FRONT);
out:

16
drivers/ide/ide-pm.c
Просмотреть файл

@ -20,7 +20,8 @@ int generic_ide_suspend(struct device *dev, pm_message_t mesg)
memset(&rqpm, 0, sizeof(rqpm));
rq = blk_get_request(drive->queue, READ, __GFP_RECLAIM);
scsi_req_init(rq);
rq->cmd_type = REQ_TYPE_ATA_PM_SUSPEND;
rq->cmd_type = REQ_TYPE_DRV_PRIV;
ide_req(rq)->type = ATA_PRIV_PM_SUSPEND;
rq->special = &rqpm;
rqpm.pm_step = IDE_PM_START_SUSPEND;
if (mesg.event == PM_EVENT_PRETHAW)
@ -91,7 +92,8 @@ int generic_ide_resume(struct device *dev)
memset(&rqpm, 0, sizeof(rqpm));
rq = blk_get_request(drive->queue, READ, __GFP_RECLAIM);
scsi_req_init(rq);
rq->cmd_type = REQ_TYPE_ATA_PM_RESUME;
rq->cmd_type = REQ_TYPE_DRV_PRIV;
ide_req(rq)->type = ATA_PRIV_PM_RESUME;
rq->rq_flags |= RQF_PREEMPT;
rq->special = &rqpm;
rqpm.pm_step = IDE_PM_START_RESUME;
@ -223,10 +225,10 @@ 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_ATA_PM_SUSPEND) ? "suspend" : "resume");
(ide_req(rq)->type == ATA_PRIV_PM_SUSPEND) ? "suspend" : "resume");
#endif
spin_lock_irqsave(q->queue_lock, flags);
if (rq->cmd_type == REQ_TYPE_ATA_PM_SUSPEND)
if (ide_req(rq)->type == ATA_PRIV_PM_SUSPEND)
blk_stop_queue(q);
else
drive->dev_flags &= ~IDE_DFLAG_BLOCKED;
@ -242,11 +244,13 @@ void ide_check_pm_state(ide_drive_t *drive, struct request *rq)
{
struct ide_pm_state *pm = rq->special;
if (rq->cmd_type == REQ_TYPE_ATA_PM_SUSPEND &&
if (rq->cmd_type == REQ_TYPE_DRV_PRIV &&
ide_req(rq)->type == ATA_PRIV_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_ATA_PM_RESUME &&
else if (rq->cmd_type == REQ_TYPE_DRV_PRIV &&
ide_req(rq)->type == ATA_PRIV_PM_RESUME &&
pm->pm_step == IDE_PM_START_RESUME) {
/*
* The first thing we do on wakeup is to wait for BSY bit to

6
drivers/ide/ide-tape.c
Просмотреть файл

@ -577,8 +577,9 @@ static ide_startstop_t idetape_do_request(ide_drive_t *drive,
req->cmd[0], (unsigned long long)blk_rq_pos(rq),
blk_rq_sectors(rq));
BUG_ON(!(rq->cmd_type == REQ_TYPE_DRV_PRIV ||
rq->cmd_type == REQ_TYPE_ATA_SENSE));
BUG_ON(rq->cmd_type != REQ_TYPE_DRV_PRIV);
BUG_ON(ide_req(rq)->type != ATA_PRIV_MISC &&
ide_req(rq)->type != ATA_PRIV_SENSE);
/* Retry a failed packet command */
if (drive->failed_pc && drive->pc->c[0] == REQUEST_SENSE) {
@ -856,6 +857,7 @@ static int idetape_queue_rw_tail(ide_drive_t *drive, int cmd, int size)
rq = blk_get_request(drive->queue, READ, __GFP_RECLAIM);
scsi_req_init(rq);
rq->cmd_type = REQ_TYPE_DRV_PRIV;
ide_req(rq)->type = ATA_PRIV_MISC;
scsi_req(rq)->cmd[13] = cmd;
rq->rq_disk = tape->disk;
rq->__sector = tape->first_frame;

3
drivers/ide/ide-taskfile.c
Просмотреть файл

@ -432,7 +432,8 @@ int ide_raw_taskfile(ide_drive_t *drive, struct ide_cmd *cmd, u8 *buf,
rq = blk_get_request(drive->queue, rw, __GFP_RECLAIM);
scsi_req_init(rq);
rq->cmd_type = REQ_TYPE_ATA_TASKFILE;
rq->cmd_type = REQ_TYPE_DRV_PRIV;
ide_req(rq)->type = ATA_PRIV_TASKFILE;
/*
* (ks) We transfer currently only whole sectors.

56
include/linux/ide.h
Просмотреть файл

@ -40,24 +40,58 @@
struct device;
/* IDE-specific values for req->cmd_type */
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 */
/* values for ide_request.type */
enum ata_priv_type {
ATA_PRIV_MISC,
ATA_PRIV_TASKFILE,
ATA_PRIV_PC,
ATA_PRIV_SENSE, /* sense request */
ATA_PRIV_PM_SUSPEND, /* suspend request */
ATA_PRIV_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)
struct ide_request {
struct scsi_request sreq;
u8 sense[SCSI_SENSE_BUFFERSIZE];
u8 type;
};
static inline struct ide_request *ide_req(struct request *rq)
{
return blk_mq_rq_to_pdu(rq);
}
static inline bool ata_misc_request(struct request *rq)
{
return rq->cmd_type == REQ_TYPE_DRV_PRIV &&
ide_req(rq)->type == ATA_PRIV_MISC;
}
static inline bool ata_taskfile_request(struct request *rq)
{
return rq->cmd_type == REQ_TYPE_DRV_PRIV &&
ide_req(rq)->type == ATA_PRIV_TASKFILE;
}
static inline bool ata_pc_request(struct request *rq)
{
return rq->cmd_type == REQ_TYPE_DRV_PRIV &&
ide_req(rq)->type == ATA_PRIV_PC;
}
static inline bool ata_sense_request(struct request *rq)
{
return rq->cmd_type == REQ_TYPE_DRV_PRIV &&
ide_req(rq)->type == ATA_PRIV_SENSE;
}
static inline bool ata_pm_request(struct request *rq)
{
return rq->cmd_type == REQ_TYPE_DRV_PRIV &&
(ide_req(rq)->type == ATA_PRIV_PM_SUSPEND ||
ide_req(rq)->type == ATA_PRIV_PM_RESUME);
}
/* Error codes returned in rq->errors to the higher part of the driver. */
enum {
IDE_DRV_ERROR_GENERAL = 101,