From 7bf7420a318978cd6042e5a5da34b7cfa18ae559 Mon Sep 17 00:00:00 2001 From: Bartlomiej Zolnierkiewicz Date: Fri, 10 Oct 2008 22:39:37 +0200 Subject: [PATCH] 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 Acked-by: Sergei Shtylyov Signed-off-by: Bartlomiej Zolnierkiewicz --- drivers/ide/ide-atapi.c | 8 ++++++++ drivers/ide/ide-floppy.c | 31 ++++++++-------------------- drivers/ide/ide-tape.c | 44 ++++++++++++---------------------------- include/linux/ide.h | 10 ++++++++- 4 files changed, 39 insertions(+), 54 deletions(-) diff --git a/drivers/ide/ide-atapi.c b/drivers/ide/ide-atapi.c index 3d44b45650f..8f0842ce77f 100644 --- a/drivers/ide/ide-atapi.c +++ b/drivers/ide/ide-atapi.c @@ -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, diff --git a/drivers/ide/ide-floppy.c b/drivers/ide/ide-floppy.c index 4bab0932c94..e04eaa49a8b 100644 --- a/drivers/ide/ide-floppy.c +++ b/drivers/ide/ide-floppy.c @@ -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)) { diff --git a/drivers/ide/ide-tape.c b/drivers/ide/ide-tape.c index 26d5b0576f0..5c879fbcca8 100644 --- a/drivers/ide/ide-tape.c +++ b/drivers/ide/ide-tape.c @@ -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; diff --git a/include/linux/ide.h b/include/linux/ide.h index 03dc2157a2b..bba2f73b99a 100644 --- a/include/linux/ide.h +++ b/include/linux/ide.h @@ -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 *), -- 2.41.1