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Subject[PATCH 05/14] ide: move command related fields from ide_hwif_t to struct ide_cmd
From: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Subject: [PATCH] ide: move command related fields from ide_hwif_t to struct ide_cmd

* Move command related fields from ide_hwif_t to struct ide_cmd.

* Make ide_init_sg_cmd() take command and sectors number as arguments.

There should be no functional changes caused by this patch.

Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
---
drivers/ide/au1xxx-ide.c | 2 +-
drivers/ide/icside.c | 2 +-
drivers/ide/ide-disk.c | 12 ++++++------
drivers/ide/ide-dma-sff.c | 2 +-
drivers/ide/ide-dma.c | 12 +++++++-----
drivers/ide/ide-floppy.c | 5 +++--
drivers/ide/ide-io.c | 24 ++++++++++--------------
drivers/ide/ide-taskfile.c | 33 ++++++++++++++++-----------------
drivers/ide/pmac.c | 2 +-
drivers/ide/sgiioc4.c | 2 +-
drivers/ide/tx4939ide.c | 2 +-
include/linux/ide.h | 18 ++++++++++--------
12 files changed, 58 insertions(+), 58 deletions(-)
Index: b/drivers/ide/au1xxx-ide.c
===================================================================
--- a/drivers/ide/au1xxx-ide.c
+++ b/drivers/ide/au1xxx-ide.c
@@ -215,7 +215,7 @@ static int auide_build_dmatable(ide_driv
struct request *rq = hwif->rq;
_auide_hwif *ahwif = &auide_hwif;
struct scatterlist *sg;
- int i = hwif->sg_nents, iswrite, count = 0;
+ int i = hwif->cmd.sg_nents, iswrite, count = 0;

iswrite = (rq_data_dir(rq) == WRITE);
/* Save for interrupt context */
Index: b/drivers/ide/icside.c
===================================================================
--- a/drivers/ide/icside.c
+++ b/drivers/ide/icside.c
@@ -344,7 +344,7 @@ static int icside_dma_setup(ide_drive_t
* Tell the DMA engine about the SG table and
* data direction.
*/
- set_dma_sg(ec->dma, hwif->sg_table, hwif->sg_nents);
+ set_dma_sg(ec->dma, hwif->sg_table, hwif->cmd.sg_nents);
set_dma_mode(ec->dma, dma_mode);

drive->waiting_for_dma = 1;
Index: b/drivers/ide/ide-disk.c
===================================================================
--- a/drivers/ide/ide-disk.c
+++ b/drivers/ide/ide-disk.c
@@ -104,14 +104,14 @@ static ide_startstop_t __ide_do_rw_disk(
lba48 = 0;
}

- if (!dma) {
- ide_init_sg_cmd(drive, rq);
- ide_map_sg(drive, rq);
- }
-
memset(&cmd, 0, sizeof(cmd));
cmd.tf_flags = IDE_TFLAG_TF | IDE_TFLAG_DEVICE;

+ if (dma == 0) {
+ ide_init_sg_cmd(&cmd, nsectors);
+ ide_map_sg(drive, rq);
+ }
+
if (drive->dev_flags & IDE_DFLAG_LBA) {
if (lba48) {
pr_debug("%s: LBA=0x%012llx\n", drive->name,
@@ -170,7 +170,7 @@ static ide_startstop_t __ide_do_rw_disk(
/* fallback to PIO */
cmd.tf_flags |= IDE_TFLAG_DMA_PIO_FALLBACK;
ide_tf_set_cmd(drive, &cmd, 0);
- ide_init_sg_cmd(drive, rq);
+ ide_init_sg_cmd(&cmd, nsectors);
rc = do_rw_taskfile(drive, &cmd);
}

Index: b/drivers/ide/ide-dma-sff.c
===================================================================
--- a/drivers/ide/ide-dma-sff.c
+++ b/drivers/ide/ide-dma-sff.c
@@ -120,7 +120,7 @@ int ide_build_dmatable(ide_drive_t *driv
struct scatterlist *sg;
u8 is_trm290 = !!(hwif->host_flags & IDE_HFLAG_TRM290);

- for_each_sg(hwif->sg_table, sg, hwif->sg_nents, i) {
+ for_each_sg(hwif->sg_table, sg, hwif->cmd.sg_nents, i) {
u32 cur_addr, cur_len, xcount, bcount;

cur_addr = sg_dma_address(sg);
Index: b/drivers/ide/ide-dma.c
===================================================================
--- a/drivers/ide/ide-dma.c
+++ b/drivers/ide/ide-dma.c
@@ -128,16 +128,17 @@ int ide_build_sglist(ide_drive_t *drive,
{
ide_hwif_t *hwif = drive->hwif;
struct scatterlist *sg = hwif->sg_table;
+ struct ide_cmd *cmd = &hwif->cmd;
int i;

ide_map_sg(drive, rq);

if (rq_data_dir(rq) == READ)
- hwif->sg_dma_direction = DMA_FROM_DEVICE;
+ cmd->sg_dma_direction = DMA_FROM_DEVICE;
else
- hwif->sg_dma_direction = DMA_TO_DEVICE;
+ cmd->sg_dma_direction = DMA_TO_DEVICE;

- i = dma_map_sg(hwif->dev, sg, hwif->sg_nents, hwif->sg_dma_direction);
+ i = dma_map_sg(hwif->dev, sg, cmd->sg_nents, cmd->sg_dma_direction);
if (i == 0)
ide_map_sg(drive, rq);

@@ -158,9 +159,10 @@ int ide_build_sglist(ide_drive_t *drive,
void ide_destroy_dmatable(ide_drive_t *drive)
{
ide_hwif_t *hwif = drive->hwif;
+ struct ide_cmd *cmd = &hwif->cmd;

- dma_unmap_sg(hwif->dev, hwif->sg_table, hwif->sg_nents,
- hwif->sg_dma_direction);
+ dma_unmap_sg(hwif->dev, hwif->sg_table, cmd->sg_nents,
+ cmd->sg_dma_direction);
}
EXPORT_SYMBOL_GPL(ide_destroy_dmatable);

Index: b/drivers/ide/ide-floppy.c
===================================================================
--- a/drivers/ide/ide-floppy.c
+++ b/drivers/ide/ide-floppy.c
@@ -244,6 +244,7 @@ static ide_startstop_t ide_floppy_do_req
{
struct ide_disk_obj *floppy = drive->driver_data;
ide_hwif_t *hwif = drive->hwif;
+ struct ide_cmd *cmd = &hwif->cmd;
struct ide_atapi_pc *pc;

if (drive->debug_mask & IDE_DBG_RQ)
@@ -284,11 +285,11 @@ static ide_startstop_t ide_floppy_do_req
goto out_end;
}

- ide_init_sg_cmd(drive, rq);
+ ide_init_sg_cmd(cmd, rq->nr_sectors);
ide_map_sg(drive, rq);

pc->sg = hwif->sg_table;
- pc->sg_cnt = hwif->sg_nents;
+ pc->sg_cnt = cmd->sg_nents;

pc->rq = rq;

Index: b/drivers/ide/ide-io.c
===================================================================
--- a/drivers/ide/ide-io.c
+++ b/drivers/ide/ide-io.c
@@ -270,30 +270,26 @@ static ide_startstop_t do_special (ide_d
void ide_map_sg(ide_drive_t *drive, struct request *rq)
{
ide_hwif_t *hwif = drive->hwif;
+ struct ide_cmd *cmd = &hwif->cmd;
struct scatterlist *sg = hwif->sg_table;

if (rq->cmd_type == REQ_TYPE_ATA_TASKFILE) {
sg_init_one(sg, rq->buffer, rq->nr_sectors * SECTOR_SIZE);
- hwif->sg_nents = 1;
+ cmd->sg_nents = 1;
} else if (!rq->bio) {
sg_init_one(sg, rq->data, rq->data_len);
- hwif->sg_nents = 1;
- } else {
- hwif->sg_nents = blk_rq_map_sg(drive->queue, rq, sg);
- }
+ cmd->sg_nents = 1;
+ } else
+ cmd->sg_nents = blk_rq_map_sg(drive->queue, rq, sg);
}
-
EXPORT_SYMBOL_GPL(ide_map_sg);

-void ide_init_sg_cmd(ide_drive_t *drive, struct request *rq)
+void ide_init_sg_cmd(struct ide_cmd *cmd, int nsect)
{
- ide_hwif_t *hwif = drive->hwif;
-
- hwif->nsect = hwif->nleft = rq->nr_sectors;
- hwif->cursg_ofs = 0;
- hwif->cursg = NULL;
+ cmd->nsect = cmd->nleft = nsect;
+ cmd->cursg_ofs = 0;
+ cmd->cursg = NULL;
}
-
EXPORT_SYMBOL_GPL(ide_init_sg_cmd);

/**
@@ -319,7 +315,7 @@ static ide_startstop_t execute_drive_cmd
case TASKFILE_OUT:
case TASKFILE_MULTI_IN:
case TASKFILE_IN:
- ide_init_sg_cmd(drive, rq);
+ ide_init_sg_cmd(cmd, rq->nr_sectors);
ide_map_sg(drive, rq);
default:
break;
Index: b/drivers/ide/ide-taskfile.c
===================================================================
--- a/drivers/ide/ide-taskfile.c
+++ b/drivers/ide/ide-taskfile.c
@@ -205,7 +205,7 @@ static void ide_pio_sector(ide_drive_t *
{
ide_hwif_t *hwif = drive->hwif;
struct scatterlist *sg = hwif->sg_table;
- struct scatterlist *cursg = hwif->cursg;
+ struct scatterlist *cursg = cmd->cursg;
struct page *page;
#ifdef CONFIG_HIGHMEM
unsigned long flags;
@@ -213,14 +213,14 @@ static void ide_pio_sector(ide_drive_t *
unsigned int offset;
u8 *buf;

- cursg = hwif->cursg;
+ cursg = cmd->cursg;
if (!cursg) {
cursg = sg;
- hwif->cursg = sg;
+ cmd->cursg = sg;
}

page = sg_page(cursg);
- offset = cursg->offset + hwif->cursg_ofs * SECTOR_SIZE;
+ offset = cursg->offset + cmd->cursg_ofs * SECTOR_SIZE;

/* get the current page and offset */
page = nth_page(page, (offset >> PAGE_SHIFT));
@@ -231,12 +231,12 @@ static void ide_pio_sector(ide_drive_t *
#endif
buf = kmap_atomic(page, KM_BIO_SRC_IRQ) + offset;

- hwif->nleft--;
- hwif->cursg_ofs++;
+ cmd->nleft--;
+ cmd->cursg_ofs++;

- if ((hwif->cursg_ofs * SECTOR_SIZE) == cursg->length) {
- hwif->cursg = sg_next(hwif->cursg);
- hwif->cursg_ofs = 0;
+ if ((cmd->cursg_ofs * SECTOR_SIZE) == cursg->length) {
+ cmd->cursg = sg_next(cmd->cursg);
+ cmd->cursg_ofs = 0;
}

/* do the actual data transfer */
@@ -256,7 +256,7 @@ static void ide_pio_multi(ide_drive_t *d
{
unsigned int nsect;

- nsect = min_t(unsigned int, drive->hwif->nleft, drive->mult_count);
+ nsect = min_t(unsigned int, cmd->nleft, drive->mult_count);
while (nsect--)
ide_pio_sector(drive, cmd, write);
}
@@ -291,19 +291,18 @@ static ide_startstop_t task_error(ide_dr
const char *s, u8 stat)
{
if (cmd->tf_flags & IDE_TFLAG_FS) {
- ide_hwif_t *hwif = drive->hwif;
- int sectors = hwif->nsect - hwif->nleft;
+ int sectors = cmd->nsect - cmd->nleft;

switch (cmd->data_phase) {
case TASKFILE_IN:
- if (hwif->nleft)
+ if (cmd->nleft)
break;
/* fall through */
case TASKFILE_OUT:
sectors--;
break;
case TASKFILE_MULTI_IN:
- if (hwif->nleft)
+ if (cmd->nleft)
break;
/* fall through */
case TASKFILE_MULTI_OUT:
@@ -371,7 +370,7 @@ static ide_startstop_t task_in_intr(ide_
ide_pio_datablock(drive, cmd, 0);

/* Are we done? Check status and finish transfer. */
- if (!hwif->nleft) {
+ if (cmd->nleft == 0) {
stat = wait_drive_not_busy(drive);
if (!OK_STAT(stat, 0, BAD_STAT))
return task_error(drive, cmd, __func__, stat);
@@ -398,10 +397,10 @@ static ide_startstop_t task_out_intr (id
return task_error(drive, cmd, __func__, stat);

/* Deal with unexpected ATA data phase. */
- if (((stat & ATA_DRQ) == 0) ^ !hwif->nleft)
+ if (((stat & ATA_DRQ) == 0) ^ (cmd->nleft == 0))
return task_error(drive, cmd, __func__, stat);

- if (!hwif->nleft) {
+ if (cmd->nleft == 0) {
ide_finish_cmd(drive, cmd, stat);
return ide_stopped;
}
Index: b/drivers/ide/pmac.c
===================================================================
--- a/drivers/ide/pmac.c
+++ b/drivers/ide/pmac.c
@@ -1432,7 +1432,7 @@ pmac_ide_build_dmatable(ide_drive_t *dri
volatile struct dbdma_regs __iomem *dma = pmif->dma_regs;
struct scatterlist *sg;
int wr = (rq_data_dir(rq) == WRITE);
- int i = hwif->sg_nents, count = 0;
+ int i = hwif->cmd.sg_nents, count = 0;

/* DMA table is already aligned */
table = (struct dbdma_cmd *) pmif->dma_table_cpu;
Index: b/drivers/ide/sgiioc4.c
===================================================================
--- a/drivers/ide/sgiioc4.c
+++ b/drivers/ide/sgiioc4.c
@@ -429,7 +429,7 @@ sgiioc4_build_dma_table(ide_drive_t * dr
{
ide_hwif_t *hwif = drive->hwif;
unsigned int *table = hwif->dmatable_cpu;
- unsigned int count = 0, i = hwif->sg_nents;
+ unsigned int count = 0, i = hwif->cmd.sg_nents;
struct scatterlist *sg = hwif->sg_table;

while (i && sg_dma_len(sg)) {
Index: b/drivers/ide/tx4939ide.c
===================================================================
--- a/drivers/ide/tx4939ide.c
+++ b/drivers/ide/tx4939ide.c
@@ -240,7 +240,7 @@ static int tx4939ide_build_dmatable(ide_
int i;
struct scatterlist *sg;

- for_each_sg(hwif->sg_table, sg, hwif->sg_nents, i) {
+ for_each_sg(hwif->sg_table, sg, hwif->cmd.sg_nents, i) {
u32 cur_addr, cur_len, bcount;

cur_addr = sg_dma_address(sg);
Index: b/include/linux/ide.h
===================================================================
--- a/include/linux/ide.h
+++ b/include/linux/ide.h
@@ -344,6 +344,15 @@ struct ide_cmd {
u8 ftf_flags; /* for TASKFILE ioctl */
u32 tf_flags;
int data_phase;
+
+ int sg_nents; /* number of sg entries */
+ int sg_dma_direction; /* DMA transfer direction */
+
+ unsigned int nsect;
+ unsigned int nleft;
+ struct scatterlist *cursg;
+ unsigned int cursg_ofs;
+
struct request *rq; /* copy of request */
void *special; /* valid_t generally */
};
@@ -772,16 +781,9 @@ typedef struct hwif_s {
/* Scatter-gather list used to build the above */
struct scatterlist *sg_table;
int sg_max_nents; /* Maximum number of entries in it */
- int sg_nents; /* Current number of entries in it */
- int sg_dma_direction; /* dma transfer direction */

struct ide_cmd cmd; /* current command */

- unsigned int nsect;
- unsigned int nleft;
- struct scatterlist *cursg;
- unsigned int cursg_ofs;
-
int rqsize; /* max sectors per request */
int irq; /* our irq number */

@@ -1407,7 +1409,7 @@ int ide_pci_resume(struct pci_dev *);
#endif

void ide_map_sg(ide_drive_t *, struct request *);
-void ide_init_sg_cmd(ide_drive_t *, struct request *);
+void ide_init_sg_cmd(struct ide_cmd *, int);

#define BAD_DMA_DRIVE 0
#define GOOD_DMA_DRIVE 1

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