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ide: add ide_init_pc() helper 

* Add IDE_PC_BUFFER_SIZE define.

* Add ide_init_pc() and convert ide-{floppy,tape}.c to use it
  instead of ide*_init_pc().

* Remove no longer used IDE*_PC_BUFFER_SIZE and ide*_init_pc().

There should be no functional changes caused by this patch.

Acked-by: Borislav Petkov <petkovbb@gmail.com>
Acked-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
This commit is contained in:
Bartlomiej Zolnierkiewicz 2008-10-10 22:39:37 +02:00
parent 385a4b8787
commit 7bf7420a31
4 changed files with 39 additions and 54 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
drivers/ide/ide-atapi.c
View File

@ -111,6 +111,14 @@ int ide_io_buffers(ide_drive_t *drive, struct ide_atapi_pc *pc,
}
EXPORT_SYMBOL_GPL(ide_io_buffers);
void ide_init_pc(struct ide_atapi_pc *pc)
{
memset(pc, 0, sizeof(*pc));
pc->buf = pc->pc_buf;
pc->buf_size = IDE_PC_BUFFER_SIZE;
}
EXPORT_SYMBOL_GPL(ide_init_pc);
/* TODO: unify the code thus making some arguments go away */
ide_startstop_t ide_pc_intr(ide_drive_t *drive, struct ide_atapi_pc *pc,
ide_handler_t *handler, unsigned int timeout, ide_expiry_t *expiry,

31
drivers/ide/ide-floppy.c
View File

@ -69,12 +69,6 @@
*/
#define IDEFLOPPY_MAX_PC_RETRIES 3
/*
* With each packet command, we allocate a buffer of IDEFLOPPY_PC_BUFFER_SIZE
* bytes.
*/
#define IDEFLOPPY_PC_BUFFER_SIZE 256
/* format capacities descriptor codes */
#define CAPACITY_INVALID 0x00
#define CAPACITY_UNFORMATTED 0x01
@ -274,16 +268,9 @@ static void ide_floppy_callback(ide_drive_t *drive)
idefloppy_end_request(drive, uptodate, 0);
}
static void idefloppy_init_pc(struct ide_atapi_pc *pc)
{
memset(pc, 0, sizeof(*pc));
pc->buf = pc->pc_buf;
pc->buf_size = IDEFLOPPY_PC_BUFFER_SIZE;
}
static void idefloppy_create_request_sense_cmd(struct ide_atapi_pc *pc)
{
idefloppy_init_pc(pc);
ide_init_pc(pc);
pc->c[0] = GPCMD_REQUEST_SENSE;
pc->c[4] = 255;
pc->req_xfer = 18;
@ -413,14 +400,14 @@ static void idefloppy_create_prevent_cmd(struct ide_atapi_pc *pc, int prevent)
{
debug_log("creating prevent removal command, prevent = %d\n", prevent);
idefloppy_init_pc(pc);
ide_init_pc(pc);
pc->c[0] = GPCMD_PREVENT_ALLOW_MEDIUM_REMOVAL;
pc->c[4] = prevent;
}
static void idefloppy_create_read_capacity_cmd(struct ide_atapi_pc *pc)
{
idefloppy_init_pc(pc);
ide_init_pc(pc);
pc->c[0] = GPCMD_READ_FORMAT_CAPACITIES;
pc->c[7] = 255;
pc->c[8] = 255;
@ -430,7 +417,7 @@ static void idefloppy_create_read_capacity_cmd(struct ide_atapi_pc *pc)
static void idefloppy_create_format_unit_cmd(struct ide_atapi_pc *pc, int b,
int l, int flags)
{
idefloppy_init_pc(pc);
ide_init_pc(pc);
pc->c[0] = GPCMD_FORMAT_UNIT;
pc->c[1] = 0x17;
@ -454,7 +441,7 @@ static void idefloppy_create_mode_sense_cmd(struct ide_atapi_pc *pc,
{
u16 length = 8; /* sizeof(Mode Parameter Header) = 8 Bytes */
idefloppy_init_pc(pc);
ide_init_pc(pc);
pc->c[0] = GPCMD_MODE_SENSE_10;
pc->c[1] = 0;
pc->c[2] = page_code;
@ -476,7 +463,7 @@ static void idefloppy_create_mode_sense_cmd(struct ide_atapi_pc *pc,
static void idefloppy_create_start_stop_cmd(struct ide_atapi_pc *pc, int start)
{
idefloppy_init_pc(pc);
ide_init_pc(pc);
pc->c[0] = GPCMD_START_STOP_UNIT;
pc->c[4] = start;
}
@ -492,7 +479,7 @@ static void idefloppy_create_rw_cmd(idefloppy_floppy_t *floppy,
debug_log("create_rw10_cmd: block == %d, blocks == %d\n",
block, blocks);
idefloppy_init_pc(pc);
ide_init_pc(pc);
pc->c[0] = cmd == READ ? GPCMD_READ_10 : GPCMD_WRITE_10;
put_unaligned(cpu_to_be16(blocks), (unsigned short *)&pc->c[7]);
put_unaligned(cpu_to_be32(block), (unsigned int *) &pc->c[2]);
@ -511,7 +498,7 @@ static void idefloppy_create_rw_cmd(idefloppy_floppy_t *floppy,
static void idefloppy_blockpc_cmd(idefloppy_floppy_t *floppy,
struct ide_atapi_pc *pc, struct request *rq)
{
idefloppy_init_pc(pc);
ide_init_pc(pc);
memcpy(pc->c, rq->cmd, sizeof(pc->c));
pc->rq = rq;
pc->b_count = 0;
@ -1071,7 +1058,7 @@ static int idefloppy_open(struct inode *inode, struct file *filp)
drive->atapi_flags &= ~IDE_AFLAG_FORMAT_IN_PROGRESS;
/* Just in case */
idefloppy_init_pc(&pc);
ide_init_pc(&pc);
pc.c[0] = GPCMD_TEST_UNIT_READY;
if (idefloppy_queue_pc_tail(drive, &pc)) {

44
drivers/ide/ide-tape.c
View File

@ -80,12 +80,6 @@ enum {
*/
#define IDETAPE_MAX_PC_RETRIES 3
/*
* With each packet command, we allocate a buffer of IDETAPE_PC_BUFFER_SIZE
* bytes. This is used for several packet commands (Not for READ/WRITE commands)
*/
#define IDETAPE_PC_BUFFER_SIZE 256
/*
* Some drives (for example, Seagate STT3401A Travan) require a very long
* timeout, because they don't return an interrupt or clear their busy bit
@ -610,21 +604,9 @@ static void ide_tape_callback(ide_drive_t *drive)
idetape_end_request(drive, uptodate, 0);
}
static void idetape_init_pc(struct ide_atapi_pc *pc)
{
memset(pc->c, 0, 12);
pc->retries = 0;
pc->flags = 0;
pc->req_xfer = 0;
pc->buf = pc->pc_buf;
pc->buf_size = IDETAPE_PC_BUFFER_SIZE;
pc->bh = NULL;
pc->b_data = NULL;
}
static void idetape_create_request_sense_cmd(struct ide_atapi_pc *pc)
{
idetape_init_pc(pc);
ide_init_pc(pc);
pc->c[0] = REQUEST_SENSE;
pc->c[4] = 20;
pc->req_xfer = 20;
@ -816,7 +798,7 @@ static ide_startstop_t idetape_issue_pc(ide_drive_t *drive,
/* A mode sense command is used to "sense" tape parameters. */
static void idetape_create_mode_sense_cmd(struct ide_atapi_pc *pc, u8 page_code)
{
idetape_init_pc(pc);
ide_init_pc(pc);
pc->c[0] = MODE_SENSE;
if (page_code != IDETAPE_BLOCK_DESCRIPTOR)
/* DBD = 1 - Don't return block descriptors */
@ -875,7 +857,7 @@ static void ide_tape_create_rw_cmd(idetape_tape_t *tape,
struct idetape_bh *bh = (struct idetape_bh *)rq->special;
unsigned int length = rq->current_nr_sectors;
idetape_init_pc(pc);
ide_init_pc(pc);
put_unaligned(cpu_to_be32(length), (unsigned int *) &pc->c[1]);
pc->c[1] = 1;
pc->bh = bh;
@ -1165,7 +1147,7 @@ static void idetape_init_merge_buffer(idetape_tape_t *tape)
static void idetape_create_write_filemark_cmd(ide_drive_t *drive,
struct ide_atapi_pc *pc, int write_filemark)
{
idetape_init_pc(pc);
ide_init_pc(pc);
pc->c[0] = WRITE_FILEMARKS;
pc->c[4] = write_filemark;
pc->flags |= PC_FLAG_WAIT_FOR_DSC;
@ -1173,7 +1155,7 @@ static void idetape_create_write_filemark_cmd(ide_drive_t *drive,
static void idetape_create_test_unit_ready_cmd(struct ide_atapi_pc *pc)
{
idetape_init_pc(pc);
ide_init_pc(pc);
pc->c[0] = TEST_UNIT_READY;
}
@ -1200,7 +1182,7 @@ static int idetape_queue_pc_tail(ide_drive_t *drive, struct ide_atapi_pc *pc)
static void idetape_create_load_unload_cmd(ide_drive_t *drive,
struct ide_atapi_pc *pc, int cmd)
{
idetape_init_pc(pc);
ide_init_pc(pc);
pc->c[0] = START_STOP;
pc->c[4] = cmd;
pc->flags |= PC_FLAG_WAIT_FOR_DSC;
@ -1252,7 +1234,7 @@ static int idetape_flush_tape_buffers(ide_drive_t *drive)
static void idetape_create_read_position_cmd(struct ide_atapi_pc *pc)
{
idetape_init_pc(pc);
ide_init_pc(pc);
pc->c[0] = READ_POSITION;
pc->req_xfer = 20;
}
@ -1276,7 +1258,7 @@ static void idetape_create_locate_cmd(ide_drive_t *drive,
struct ide_atapi_pc *pc,
unsigned int block, u8 partition, int skip)
{
idetape_init_pc(pc);
ide_init_pc(pc);
pc->c[0] = POSITION_TO_ELEMENT;
pc->c[1] = 2;
put_unaligned(cpu_to_be32(block), (unsigned int *) &pc->c[3]);
@ -1293,7 +1275,7 @@ static int idetape_create_prevent_cmd(ide_drive_t *drive,
if (!(tape->caps[6] & 0x01))
return 0;
idetape_init_pc(pc);
ide_init_pc(pc);
pc->c[0] = ALLOW_MEDIUM_REMOVAL;
pc->c[4] = prevent;
return 1;
@ -1408,7 +1390,7 @@ static int idetape_queue_rw_tail(ide_drive_t *drive, int cmd, int blocks,
static void idetape_create_inquiry_cmd(struct ide_atapi_pc *pc)
{
idetape_init_pc(pc);
ide_init_pc(pc);
pc->c[0] = INQUIRY;
pc->c[4] = 254;
pc->req_xfer = 254;
@ -1417,14 +1399,14 @@ static void idetape_create_inquiry_cmd(struct ide_atapi_pc *pc)
static void idetape_create_rewind_cmd(ide_drive_t *drive,
struct ide_atapi_pc *pc)
{
idetape_init_pc(pc);
ide_init_pc(pc);
pc->c[0] = REZERO_UNIT;
pc->flags |= PC_FLAG_WAIT_FOR_DSC;
}
static void idetape_create_erase_cmd(struct ide_atapi_pc *pc)
{
idetape_init_pc(pc);
ide_init_pc(pc);
pc->c[0] = ERASE;
pc->c[1] = 1;
pc->flags |= PC_FLAG_WAIT_FOR_DSC;
@ -1432,7 +1414,7 @@ static void idetape_create_erase_cmd(struct ide_atapi_pc *pc)
static void idetape_create_space_cmd(struct ide_atapi_pc *pc, int count, u8 cmd)
{
idetape_init_pc(pc);
ide_init_pc(pc);
pc->c[0] = SPACE;
put_unaligned(cpu_to_be32(count), (unsigned int *) &pc->c[1]);
pc->c[1] = cmd;

10
include/linux/ide.h
View File

@ -724,6 +724,12 @@ enum {
PC_FLAG_TIMEDOUT = (1 << 7),
};
/*
* With each packet command, we allocate a buffer of IDE_PC_BUFFER_SIZE bytes.
* This is used for several packet commands (not for READ/WRITE commands).
*/
#define IDE_PC_BUFFER_SIZE 256
struct ide_atapi_pc {
/* actual packet bytes */
u8 c[12];
@ -753,7 +759,7 @@ struct ide_atapi_pc {
* those are more or less driver-specific and some of them are subject
* to change/removal later.
*/
u8 pc_buf[256];
u8 pc_buf[IDE_PC_BUFFER_SIZE];
/* idetape only */
struct idetape_bh *bh;
@ -1113,6 +1119,8 @@ void ide_pktcmd_tf_load(ide_drive_t *, u32, u16, u8);
int ide_check_atapi_device(ide_drive_t *, const char *);
void ide_init_pc(struct ide_atapi_pc *);
ide_startstop_t ide_pc_intr(ide_drive_t *drive, struct ide_atapi_pc *pc,
ide_handler_t *handler, unsigned int timeout, ide_expiry_t *expiry,
void (*update_buffers)(ide_drive_t *, struct ide_atapi_pc *),