[PATCH 0/4] ide: generic packet command representation

[PATCH 0/4] ide: generic packet command representation

[Borislav Petkov]

Hi Bart,

here's the ide_atapi_pc unification series. It all went pretty smoothly along
the search & replace line. Using driver-specific members in ide_atapi_pc like
idefloppy_callback and idetape_callback is kinda dumb but this approach seemed
the fastest versus unnecessary callback function signature change that will
touch stuff all over the place. Besides, ide-tape might be gone soon so that
would alleviate the problem.

On a different note, i noticed ide-scsi might also need a cleanup similar to the
other drivers. It is next on my TODO list in case you don't have anything with a
higher prio.


 drivers/ide/ide-floppy.c |  205 +++++++++++++++++--------------------
 drivers/ide/ide-tape.c   |  251 +++++++++++++++++++++-------------------------
 drivers/scsi/ide-scsi.c  |  133 +++++++++++-------------
 include/linux/ide.h      |   47 +++++++++
 4 files changed, 316 insertions(+), 320 deletions(-)

-- 
Thanks,
Boris.

[PATCH 1/4] ide: add generic packet command representation ide_atapi_pc

[Borislav Petkov]

This new struct unifies ide{-floppy,-tape,-scsi}'s view of a packet command. For now,
it represents the common denominator between the three drivers while adding driver-
specific members at the end of the struct which will be merged/simplified into the
generic ATAPI handling code in later steps, or removed completely.

Signed-off-by: Borislav Petkov <petkovbb@gmail.com>
---
 include/linux/ide.h |   47 +++++++++++++++++++++++++++++++++++++++++++++++
 1 files changed, 47 insertions(+), 0 deletions(-)

diff --git a/include/linux/ide.h b/include/linux/ide.h
index e4eddd4..aae98d7 100644
--- a/include/linux/ide.h
+++ b/include/linux/ide.h
@@ -629,6 +629,53 @@ typedef struct ide_settings_s {
 
 int ide_add_setting(ide_drive_t *, const char *, int, int, int, int, int, int, void *, ide_procset_t *set);
 
+struct ide_atapi_pc {
+	/* actual packet bytes */
+	u8 c[12];
+	/* incremented on each retry */
+	int retries;
+	int error;
+
+	/* bytes to transfer */
+	int req_xfer;
+	/* bytes actually transferred */
+	int xferred;
+
+	/* data buffer */
+	u8 *buf;
+	/* current buffer position */
+	u8 *cur_pos;
+	int buf_size;
+	/* missing/available data on the current buffer */
+	int b_count;
+
+	/* the corresponding request */
+	struct request *rq;
+
+	unsigned long flags;
+
+	/*
+	 * those are more or less driver-specific and some of them are subject
+	 * to change/removal later.
+	 */
+	u8 pc_buf[256];
+	void (*idefloppy_callback) (ide_drive_t *);
+	ide_startstop_t (*idetape_callback) (ide_drive_t *);
+
+	/* idetape only */
+	struct idetape_bh *bh;
+	char *b_data;
+
+	/* idescsi only for now */
+	struct scatterlist *sg;
+	unsigned int sg_cnt;
+
+	struct scsi_cmnd *scsi_cmd;
+	void (*done) (struct scsi_cmnd *);
+
+	unsigned long timeout;
+};
+
 /*
  * /proc/ide interface
  */
-- 
1.5.3.7

[PATCH 2/4] ide-floppy: convert driver to using generic ide_atapi_pc

[Borislav Petkov]

Signed-off-by: Borislav Petkov <petkovbb@gmail.com>
---
 drivers/ide/ide-floppy.c |  205 +++++++++++++++++++++-------------------------
 1 files changed, 93 insertions(+), 112 deletions(-)

diff --git a/drivers/ide/ide-floppy.c b/drivers/ide/ide-floppy.c
index 4ce67bd..7e62dfc 100644
--- a/drivers/ide/ide-floppy.c
+++ b/drivers/ide/ide-floppy.c
@@ -78,26 +78,6 @@
  */
 #define IDEFLOPPY_PC_STACK		(10 + IDEFLOPPY_MAX_PC_RETRIES)
 
-typedef struct idefloppy_packet_command_s {
-	u8 c[12];				/* Actual packet bytes */
-	int retries;				/* On each retry, we increment
-						   retries */
-	int error;				/* Error code */
-	int request_transfer;			/* Bytes to transfer */
-	int actually_transferred;		/* Bytes actually transferred */
-	int buffer_size;			/* Size of our data buffer */
-	int b_count;				/* Missing/Available data on
-						   the current buffer */
-	struct request *rq;			/* The corresponding request */
-	u8 *buffer;				/* Data buffer */
-	u8 *current_position;			/* Pointer into above buffer */
-	void (*callback) (ide_drive_t *);	/* Called when this packet
-						   command is completed */
-	u8 pc_buffer[IDEFLOPPY_PC_BUFFER_SIZE];	/* Temporary buffer */
-	unsigned long flags;			/* Status/Action bit flags: long
-						   for set_bit */
-} idefloppy_pc_t;
-
 /* Packet command flag bits. */
 enum {
 	/* 1 when we prefer to use DMA if possible */
@@ -131,11 +111,11 @@ typedef struct ide_floppy_obj {
 	unsigned int	openers;	/* protected by BKL for now */
 
 	/* Current packet command */
-	idefloppy_pc_t *pc;
+	struct ide_atapi_pc *pc;
 	/* Last failed packet command */
-	idefloppy_pc_t *failed_pc;
+	struct ide_atapi_pc *failed_pc;
 	/* Packet command stack */
-	idefloppy_pc_t pc_stack[IDEFLOPPY_PC_STACK];
+	struct ide_atapi_pc pc_stack[IDEFLOPPY_PC_STACK];
 	/* Next free packet command storage space */
 	int pc_stack_index;
 	struct request rq_stack[IDEFLOPPY_PC_STACK];
@@ -262,7 +242,7 @@ static int idefloppy_do_end_request(ide_drive_t *drive, int uptodate, int nsecs)
 	return 0;
 }
 
-static void ide_floppy_io_buffers(ide_drive_t *drive, idefloppy_pc_t *pc,
+static void ide_floppy_io_buffers(ide_drive_t *drive, struct ide_atapi_pc *pc,
 				  unsigned int bcount, int direction)
 {
 	struct request *rq = pc->rq;
@@ -302,7 +282,8 @@ static void ide_floppy_io_buffers(ide_drive_t *drive, idefloppy_pc_t *pc,
 	}
 }
 
-static void idefloppy_update_buffers(ide_drive_t *drive, idefloppy_pc_t *pc)
+static void idefloppy_update_buffers(ide_drive_t *drive,
+				struct ide_atapi_pc *pc)
 {
 	struct request *rq = pc->rq;
 	struct bio *bio = rq->bio;
@@ -316,7 +297,7 @@ static void idefloppy_update_buffers(ide_drive_t *drive, idefloppy_pc_t *pc)
  * the current request so that it will be processed immediately, on the next
  * pass through the driver.
  */
-static void idefloppy_queue_pc_head(ide_drive_t *drive, idefloppy_pc_t *pc,
+static void idefloppy_queue_pc_head(ide_drive_t *drive, struct ide_atapi_pc *pc,
 		struct request *rq)
 {
 	struct ide_floppy_obj *floppy = drive->driver_data;
@@ -328,7 +309,7 @@ static void idefloppy_queue_pc_head(ide_drive_t *drive, idefloppy_pc_t *pc,
 	(void) ide_do_drive_cmd(drive, rq, ide_preempt);
 }
 
-static idefloppy_pc_t *idefloppy_next_pc_storage(ide_drive_t *drive)
+static struct ide_atapi_pc *idefloppy_next_pc_storage(ide_drive_t *drive)
 {
 	idefloppy_floppy_t *floppy = drive->driver_data;
 
@@ -349,7 +330,7 @@ static struct request *idefloppy_next_rq_storage(ide_drive_t *drive)
 static void idefloppy_request_sense_callback(ide_drive_t *drive)
 {
 	idefloppy_floppy_t *floppy = drive->driver_data;
-	u8 *buf = floppy->pc->buffer;
+	u8 *buf = floppy->pc->buf;
 
 	debug_log("Reached %s\n", __func__);
 
@@ -392,24 +373,24 @@ static void idefloppy_pc_callback(ide_drive_t *drive)
 	idefloppy_do_end_request(drive, floppy->pc->error ? 0 : 1, 0);
 }
 
-static void idefloppy_init_pc(idefloppy_pc_t *pc)
+static void idefloppy_init_pc(struct ide_atapi_pc *pc)
 {
 	memset(pc->c, 0, 12);
 	pc->retries = 0;
 	pc->flags = 0;
-	pc->request_transfer = 0;
-	pc->buffer = pc->pc_buffer;
-	pc->buffer_size = IDEFLOPPY_PC_BUFFER_SIZE;
-	pc->callback = &idefloppy_pc_callback;
+	pc->req_xfer = 0;
+	pc->buf = pc->pc_buf;
+	pc->buf_size = IDEFLOPPY_PC_BUFFER_SIZE;
+	pc->idefloppy_callback = &idefloppy_pc_callback;
 }
 
-static void idefloppy_create_request_sense_cmd(idefloppy_pc_t *pc)
+static void idefloppy_create_request_sense_cmd(struct ide_atapi_pc *pc)
 {
 	idefloppy_init_pc(pc);
 	pc->c[0] = GPCMD_REQUEST_SENSE;
 	pc->c[4] = 255;
-	pc->request_transfer = 18;
-	pc->callback = &idefloppy_request_sense_callback;
+	pc->req_xfer = 18;
+	pc->idefloppy_callback = &idefloppy_request_sense_callback;
 }
 
 /*
@@ -418,7 +399,7 @@ static void idefloppy_create_request_sense_cmd(idefloppy_pc_t *pc)
  */
 static void idefloppy_retry_pc(ide_drive_t *drive)
 {
-	idefloppy_pc_t *pc;
+	struct ide_atapi_pc *pc;
 	struct request *rq;
 
 	(void)ide_read_error(drive);
@@ -433,7 +414,7 @@ static ide_startstop_t idefloppy_pc_intr (ide_drive_t *drive)
 {
 	idefloppy_floppy_t *floppy = drive->driver_data;
 	ide_hwif_t *hwif = drive->hwif;
-	idefloppy_pc_t *pc = floppy->pc;
+	struct ide_atapi_pc *pc = floppy->pc;
 	struct request *rq = pc->rq;
 	xfer_func_t *xferfunc;
 	unsigned int temp;
@@ -450,7 +431,7 @@ static ide_startstop_t idefloppy_pc_intr (ide_drive_t *drive)
 					rq_data_dir(rq) ? "write" : "read");
 			pc->flags |= PC_FLAG_DMA_ERROR;
 		} else {
-			pc->actually_transferred = pc->request_transfer;
+			pc->xferred = pc->req_xfer;
 			idefloppy_update_buffers(drive, pc);
 		}
 		debug_log("DMA finished\n");
@@ -462,7 +443,7 @@ static ide_startstop_t idefloppy_pc_intr (ide_drive_t *drive)
 	/* No more interrupts */
 	if ((stat & DRQ_STAT) == 0) {
 		debug_log("Packet command completed, %d bytes transferred\n",
-				pc->actually_transferred);
+				pc->xferred);
 		pc->flags &= ~PC_FLAG_DMA_IN_PROGRESS;
 
 		local_irq_enable_in_hardirq();
@@ -485,7 +466,7 @@ static ide_startstop_t idefloppy_pc_intr (ide_drive_t *drive)
 		if (floppy->failed_pc == pc)
 			floppy->failed_pc = NULL;
 		/* Command finished - Call the callback function */
-		pc->callback(drive);
+		pc->idefloppy_callback(drive);
 		return ide_stopped;
 	}
 
@@ -517,9 +498,9 @@ static ide_startstop_t idefloppy_pc_intr (ide_drive_t *drive)
 	}
 	if (!(pc->flags & PC_FLAG_WRITING)) {
 		/* Reading - Check that we have enough space */
-		temp = pc->actually_transferred + bcount;
-		if (temp > pc->request_transfer) {
-			if (temp > pc->buffer_size) {
+		temp = pc->xferred + bcount;
+		if (temp > pc->req_xfer) {
+			if (temp > pc->buf_size) {
 				printk(KERN_ERR "ide-floppy: The floppy wants "
 					"to send us more data than expected "
 					"- discarding data\n");
@@ -540,15 +521,15 @@ static ide_startstop_t idefloppy_pc_intr (ide_drive_t *drive)
 	else
 		xferfunc = hwif->atapi_input_bytes;
 
-	if (pc->buffer)
-		xferfunc(drive, pc->current_position, bcount);
+	if (pc->buf)
+		xferfunc(drive, pc->cur_pos, bcount);
 	else
 		ide_floppy_io_buffers(drive, pc, bcount,
 				      !!(pc->flags & PC_FLAG_WRITING));
 
 	/* Update the current position */
-	pc->actually_transferred += bcount;
-	pc->current_position += bcount;
+	pc->xferred += bcount;
+	pc->cur_pos += bcount;
 
 	/* And set the interrupt handler again */
 	ide_set_handler(drive, &idefloppy_pc_intr, IDEFLOPPY_WAIT_CMD, NULL);
@@ -640,7 +621,7 @@ static ide_startstop_t idefloppy_transfer_pc1(ide_drive_t *drive)
 }
 
 static void ide_floppy_report_error(idefloppy_floppy_t *floppy,
-				    idefloppy_pc_t *pc)
+				    struct ide_atapi_pc *pc)
 {
 	/* supress error messages resulting from Medium not present */
 	if (floppy->sense_key == 0x02 &&
@@ -656,7 +637,7 @@ static void ide_floppy_report_error(idefloppy_floppy_t *floppy,
 }
 
 static ide_startstop_t idefloppy_issue_pc(ide_drive_t *drive,
-		idefloppy_pc_t *pc)
+		struct ide_atapi_pc *pc)
 {
 	idefloppy_floppy_t *floppy = drive->driver_data;
 	ide_hwif_t *hwif = drive->hwif;
@@ -677,7 +658,7 @@ static ide_startstop_t idefloppy_issue_pc(ide_drive_t *drive,
 		pc->error = IDEFLOPPY_ERROR_GENERAL;
 
 		floppy->failed_pc = NULL;
-		pc->callback(drive);
+		pc->idefloppy_callback(drive);
 		return ide_stopped;
 	}
 
@@ -685,9 +666,9 @@ static ide_startstop_t idefloppy_issue_pc(ide_drive_t *drive,
 
 	pc->retries++;
 	/* We haven't transferred any data yet */
-	pc->actually_transferred = 0;
-	pc->current_position = pc->buffer;
-	bcount = min(pc->request_transfer, 63 * 1024);
+	pc->xferred = 0;
+	pc->cur_pos = pc->buf;
+	bcount = min(pc->req_xfer, 63 * 1024);
 
 	if (pc->flags & PC_FLAG_DMA_ERROR) {
 		pc->flags &= ~PC_FLAG_DMA_ERROR;
@@ -715,7 +696,7 @@ static ide_startstop_t idefloppy_issue_pc(ide_drive_t *drive,
 		/* immediate */
 		pkt_xfer_routine = &idefloppy_transfer_pc;
 	}
-	
+
 	if (floppy->flags & IDEFLOPPY_FLAG_DRQ_INTERRUPT) {
 		/* Issue the packet command */
 		ide_execute_command(drive, WIN_PACKETCMD,
@@ -738,7 +719,7 @@ static void idefloppy_rw_callback(ide_drive_t *drive)
 	return;
 }
 
-static void idefloppy_create_prevent_cmd(idefloppy_pc_t *pc, int prevent)
+static void idefloppy_create_prevent_cmd(struct ide_atapi_pc *pc, int prevent)
 {
 	debug_log("creating prevent removal command, prevent = %d\n", prevent);
 
@@ -747,39 +728,39 @@ static void idefloppy_create_prevent_cmd(idefloppy_pc_t *pc, int prevent)
 	pc->c[4] = prevent;
 }
 
-static void idefloppy_create_read_capacity_cmd(idefloppy_pc_t *pc)
+static void idefloppy_create_read_capacity_cmd(struct ide_atapi_pc *pc)
 {
 	idefloppy_init_pc(pc);
 	pc->c[0] = GPCMD_READ_FORMAT_CAPACITIES;
 	pc->c[7] = 255;
 	pc->c[8] = 255;
-	pc->request_transfer = 255;
+	pc->req_xfer = 255;
 }
 
-static void idefloppy_create_format_unit_cmd(idefloppy_pc_t *pc, int b, int l,
-					      int flags)
+static void idefloppy_create_format_unit_cmd(struct ide_atapi_pc *pc, int b,
+		int l, int flags)
 {
 	idefloppy_init_pc(pc);
 	pc->c[0] = GPCMD_FORMAT_UNIT;
 	pc->c[1] = 0x17;
 
-	memset(pc->buffer, 0, 12);
-	pc->buffer[1] = 0xA2;
+	memset(pc->buf, 0, 12);
+	pc->buf[1] = 0xA2;
 	/* Default format list header, u8 1: FOV/DCRT/IMM bits set */
 
 	if (flags & 1)				/* Verify bit on... */
-		pc->buffer[1] ^= 0x20;		/* ... turn off DCRT bit */
-	pc->buffer[3] = 8;
+		pc->buf[1] ^= 0x20;		/* ... turn off DCRT bit */
+	pc->buf[3] = 8;
 
-	put_unaligned(cpu_to_be32(b), (unsigned int *)(&pc->buffer[4]));
-	put_unaligned(cpu_to_be32(l), (unsigned int *)(&pc->buffer[8]));
-	pc->buffer_size = 12;
+	put_unaligned(cpu_to_be32(b), (unsigned int *)(&pc->buf[4]));
+	put_unaligned(cpu_to_be32(l), (unsigned int *)(&pc->buf[8]));
+	pc->buf_size = 12;
 	pc->flags |= PC_FLAG_WRITING;
 }
 
 /* A mode sense command is used to "sense" floppy parameters. */
-static void idefloppy_create_mode_sense_cmd(idefloppy_pc_t *pc, u8 page_code,
-		u8 type)
+static void idefloppy_create_mode_sense_cmd(struct ide_atapi_pc *pc,
+		u8 page_code, u8 type)
 {
 	u16 length = 8; /* sizeof(Mode Parameter Header) = 8 Bytes */
 
@@ -800,24 +781,24 @@ static void idefloppy_create_mode_sense_cmd(idefloppy_pc_t *pc, u8 page_code,
 				"in create_mode_sense_cmd\n");
 	}
 	put_unaligned(cpu_to_be16(length), (u16 *) &pc->c[7]);
-	pc->request_transfer = length;
+	pc->req_xfer = length;
 }
 
-static void idefloppy_create_start_stop_cmd(idefloppy_pc_t *pc, int start)
+static void idefloppy_create_start_stop_cmd(struct ide_atapi_pc *pc, int start)
 {
 	idefloppy_init_pc(pc);
 	pc->c[0] = GPCMD_START_STOP_UNIT;
 	pc->c[4] = start;
 }
 
-static void idefloppy_create_test_unit_ready_cmd(idefloppy_pc_t *pc)
+static void idefloppy_create_test_unit_ready_cmd(struct ide_atapi_pc *pc)
 {
 	idefloppy_init_pc(pc);
 	pc->c[0] = GPCMD_TEST_UNIT_READY;
 }
 
 static void idefloppy_create_rw_cmd(idefloppy_floppy_t *floppy,
-				    idefloppy_pc_t *pc, struct request *rq,
+				    struct ide_atapi_pc *pc, struct request *rq,
 				    unsigned long sector)
 {
 	int block = sector / floppy->bs_factor;
@@ -832,41 +813,41 @@ static void idefloppy_create_rw_cmd(idefloppy_floppy_t *floppy,
 	put_unaligned(cpu_to_be16(blocks), (unsigned short *)&pc->c[7]);
 	put_unaligned(cpu_to_be32(block), (unsigned int *) &pc->c[2]);
 
-	pc->callback = &idefloppy_rw_callback;
+	pc->idefloppy_callback = &idefloppy_rw_callback;
 	pc->rq = rq;
 	pc->b_count = cmd == READ ? 0 : rq->bio->bi_size;
 	if (rq->cmd_flags & REQ_RW)
 		pc->flags |= PC_FLAG_WRITING;
-	pc->buffer = NULL;
-	pc->request_transfer = pc->buffer_size = blocks * floppy->block_size;
+	pc->buf = NULL;
+	pc->req_xfer = pc->buf_size = blocks * floppy->block_size;
 	pc->flags |= PC_FLAG_DMA_RECOMMENDED;
 }
 
 static void idefloppy_blockpc_cmd(idefloppy_floppy_t *floppy,
-		idefloppy_pc_t *pc, struct request *rq)
+		struct ide_atapi_pc *pc, struct request *rq)
 {
 	idefloppy_init_pc(pc);
-	pc->callback = &idefloppy_rw_callback;
+	pc->idefloppy_callback = &idefloppy_rw_callback;
 	memcpy(pc->c, rq->cmd, sizeof(pc->c));
 	pc->rq = rq;
 	pc->b_count = rq->data_len;
 	if (rq->data_len && rq_data_dir(rq) == WRITE)
 		pc->flags |= PC_FLAG_WRITING;
-	pc->buffer = rq->data;
+	pc->buf = rq->data;
 	if (rq->bio)
 		pc->flags |= PC_FLAG_DMA_RECOMMENDED;
 	/*
 	 * possibly problematic, doesn't look like ide-floppy correctly
 	 * handled scattered requests if dma fails...
 	 */
-	pc->request_transfer = pc->buffer_size = rq->data_len;
+	pc->req_xfer = pc->buf_size = rq->data_len;
 }
 
 static ide_startstop_t idefloppy_do_request(ide_drive_t *drive,
 		struct request *rq, sector_t block_s)
 {
 	idefloppy_floppy_t *floppy = drive->driver_data;
-	idefloppy_pc_t *pc;
+	struct ide_atapi_pc *pc;
 	unsigned long block = (unsigned long)block_s;
 
 	debug_log("dev: %s, cmd_type: %x, errors: %d\n",
@@ -896,7 +877,7 @@ static ide_startstop_t idefloppy_do_request(ide_drive_t *drive,
 		pc = idefloppy_next_pc_storage(drive);
 		idefloppy_create_rw_cmd(floppy, pc, rq, block);
 	} else if (blk_special_request(rq)) {
-		pc = (idefloppy_pc_t *) rq->buffer;
+		pc = (struct ide_atapi_pc *) rq->buffer;
 	} else if (blk_pc_request(rq)) {
 		pc = idefloppy_next_pc_storage(drive);
 		idefloppy_blockpc_cmd(floppy, pc, rq);
@@ -915,7 +896,7 @@ static ide_startstop_t idefloppy_do_request(ide_drive_t *drive,
  * Add a special packet command request to the tail of the request queue,
  * and wait for it to be serviced.
  */
-static int idefloppy_queue_pc_tail(ide_drive_t *drive, idefloppy_pc_t *pc)
+static int idefloppy_queue_pc_tail(ide_drive_t *drive, struct ide_atapi_pc *pc)
 {
 	struct ide_floppy_obj *floppy = drive->driver_data;
 	struct request rq;
@@ -935,7 +916,7 @@ static int idefloppy_queue_pc_tail(ide_drive_t *drive, idefloppy_pc_t *pc)
 static int ide_floppy_get_flexible_disk_page(ide_drive_t *drive)
 {
 	idefloppy_floppy_t *floppy = drive->driver_data;
-	idefloppy_pc_t pc;
+	struct ide_atapi_pc pc;
 	u8 *page;
 	int capacity, lba_capacity;
 	u16 transfer_rate, sector_size, cyls, rpm;
@@ -949,16 +930,16 @@ static int ide_floppy_get_flexible_disk_page(ide_drive_t *drive)
 				" parameters\n");
 		return 1;
 	}
-	floppy->wp = !!(pc.buffer[3] & 0x80);
+	floppy->wp = !!(pc.buf[3] & 0x80);
 	set_disk_ro(floppy->disk, floppy->wp);
-	page = &pc.buffer[8];
+	page = &pc.buf[8];
 
-	transfer_rate = be16_to_cpu(*(u16 *)&pc.buffer[8 + 2]);
-	sector_size   = be16_to_cpu(*(u16 *)&pc.buffer[8 + 6]);
-	cyls          = be16_to_cpu(*(u16 *)&pc.buffer[8 + 8]);
-	rpm           = be16_to_cpu(*(u16 *)&pc.buffer[8 + 28]);
-	heads         = pc.buffer[8 + 4];
-	sectors       = pc.buffer[8 + 5];
+	transfer_rate = be16_to_cpu(*(u16 *)&pc.buf[8 + 2]);
+	sector_size   = be16_to_cpu(*(u16 *)&pc.buf[8 + 6]);
+	cyls          = be16_to_cpu(*(u16 *)&pc.buf[8 + 8]);
+	rpm           = be16_to_cpu(*(u16 *)&pc.buf[8 + 28]);
+	heads         = pc.buf[8 + 4];
+	sectors       = pc.buf[8 + 5];
 
 	capacity = cyls * heads * sectors * sector_size;
 
@@ -987,7 +968,7 @@ static int ide_floppy_get_flexible_disk_page(ide_drive_t *drive)
 static int idefloppy_get_sfrp_bit(ide_drive_t *drive)
 {
 	idefloppy_floppy_t *floppy = drive->driver_data;
-	idefloppy_pc_t pc;
+	struct ide_atapi_pc pc;
 
 	floppy->srfp = 0;
 	idefloppy_create_mode_sense_cmd(&pc, IDEFLOPPY_CAPABILITIES_PAGE,
@@ -997,7 +978,7 @@ static int idefloppy_get_sfrp_bit(ide_drive_t *drive)
 	if (idefloppy_queue_pc_tail(drive, &pc))
 		return 1;
 
-	floppy->srfp = pc.buffer[8 + 2] & 0x40;
+	floppy->srfp = pc.buf[8 + 2] & 0x40;
 	return (0);
 }
 
@@ -1008,7 +989,7 @@ static int idefloppy_get_sfrp_bit(ide_drive_t *drive)
 static int ide_floppy_get_capacity(ide_drive_t *drive)
 {
 	idefloppy_floppy_t *floppy = drive->driver_data;
-	idefloppy_pc_t pc;
+	struct ide_atapi_pc pc;
 	u8 *cap_desc;
 	u8 header_len, desc_cnt;
 	int i, rc = 1, blocks, length;
@@ -1024,15 +1005,15 @@ static int ide_floppy_get_capacity(ide_drive_t *drive)
 		printk(KERN_ERR "ide-floppy: Can't get floppy parameters\n");
 		return 1;
 	}
-	header_len = pc.buffer[3];
-	cap_desc = &pc.buffer[4];
+	header_len = pc.buf[3];
+	cap_desc = &pc.buf[4];
 	desc_cnt = header_len / 8; /* capacity descriptor of 8 bytes */
 
 	for (i = 0; i < desc_cnt; i++) {
 		unsigned int desc_start = 4 + i*8;
 
-		blocks = be32_to_cpu(*(u32 *)&pc.buffer[desc_start]);
-		length = be16_to_cpu(*(u16 *)&pc.buffer[desc_start + 6]);
+		blocks = be32_to_cpu(*(u32 *)&pc.buf[desc_start]);
+		length = be16_to_cpu(*(u16 *)&pc.buf[desc_start + 6]);
 
 		debug_log("Descriptor %d: %dkB, %d blocks, %d sector size\n",
 				i, blocks * length / 1024, blocks, length);
@@ -1043,7 +1024,7 @@ static int ide_floppy_get_capacity(ide_drive_t *drive)
 		 * the code below is valid only for the 1st descriptor, ie i=0
 		 */
 
-		switch (pc.buffer[desc_start + 4] & 0x03) {
+		switch (pc.buf[desc_start + 4] & 0x03) {
 		/* Clik! drive returns this instead of CAPACITY_CURRENT */
 		case CAPACITY_UNFORMATTED:
 			if (!(floppy->flags & IDEFLOPPY_FLAG_CLIK_DRIVE))
@@ -1088,7 +1069,7 @@ static int ide_floppy_get_capacity(ide_drive_t *drive)
 			break;
 		}
 		debug_log("Descriptor 0 Code: %d\n",
-			  pc.buffer[desc_start + 4] & 0x03);
+			  pc.buf[desc_start + 4] & 0x03);
 	}
 
 	/* Clik! disk does not support get_flexible_disk_page */
@@ -1120,7 +1101,7 @@ static int ide_floppy_get_capacity(ide_drive_t *drive)
 
 static int ide_floppy_get_format_capacities(ide_drive_t *drive, int __user *arg)
 {
-	idefloppy_pc_t pc;
+	struct ide_atapi_pc pc;
 	u8 header_len, desc_cnt;
 	int i, blocks, length, u_array_size, u_index;
 	int __user *argp;
@@ -1136,7 +1117,7 @@ static int ide_floppy_get_format_capacities(ide_drive_t *drive, int __user *arg)
 		printk(KERN_ERR "ide-floppy: Can't get floppy parameters\n");
 		return (-EIO);
 	}
-	header_len = pc.buffer[3];
+	header_len = pc.buf[3];
 	desc_cnt = header_len / 8; /* capacity descriptor of 8 bytes */
 
 	u_index = 0;
@@ -1153,8 +1134,8 @@ static int ide_floppy_get_format_capacities(ide_drive_t *drive, int __user *arg)
 		if (u_index >= u_array_size)
 			break;	/* User-supplied buffer too small */
 
-		blocks = be32_to_cpu(*(u32 *)&pc.buffer[desc_start]);
-		length = be16_to_cpu(*(u16 *)&pc.buffer[desc_start + 6]);
+		blocks = be32_to_cpu(*(u32 *)&pc.buf[desc_start]);
+		length = be16_to_cpu(*(u16 *)&pc.buf[desc_start + 6]);
 
 		if (put_user(blocks, argp))
 			return(-EFAULT);
@@ -1185,7 +1166,7 @@ static int ide_floppy_get_format_capacities(ide_drive_t *drive, int __user *arg)
 static int idefloppy_get_format_progress(ide_drive_t *drive, int __user *arg)
 {
 	idefloppy_floppy_t *floppy = drive->driver_data;
-	idefloppy_pc_t pc;
+	struct ide_atapi_pc pc;
 	int progress_indication = 0x10000;
 
 	if (floppy->srfp) {
@@ -1391,7 +1372,7 @@ static int idefloppy_open(struct inode *inode, struct file *filp)
 	struct gendisk *disk = inode->i_bdev->bd_disk;
 	struct ide_floppy_obj *floppy;
 	ide_drive_t *drive;
-	idefloppy_pc_t pc;
+	struct ide_atapi_pc pc;
 	int ret = 0;
 
 	debug_log("Reached %s\n", __func__);
@@ -1454,7 +1435,7 @@ static int idefloppy_release(struct inode *inode, struct file *filp)
 	struct gendisk *disk = inode->i_bdev->bd_disk;
 	struct ide_floppy_obj *floppy = ide_floppy_g(disk);
 	ide_drive_t *drive = floppy->drive;
-	idefloppy_pc_t pc;
+	struct ide_atapi_pc pc;
 
 	debug_log("Reached %s\n", __func__);
 
@@ -1486,8 +1467,8 @@ static int idefloppy_getgeo(struct block_device *bdev, struct hd_geometry *geo)
 	return 0;
 }
 
-static int ide_floppy_lockdoor(idefloppy_floppy_t *floppy, idefloppy_pc_t *pc,
-			       unsigned long arg, unsigned int cmd)
+static int ide_floppy_lockdoor(idefloppy_floppy_t *floppy,
+		struct ide_atapi_pc *pc, unsigned long arg, unsigned int cmd)
 {
 	if (floppy->openers > 1)
 		return -EBUSY;
@@ -1516,7 +1497,7 @@ static int ide_floppy_format_unit(idefloppy_floppy_t *floppy,
 				  int __user *arg)
 {
 	int blocks, length, flags, err = 0;
-	idefloppy_pc_t pc;
+	struct ide_atapi_pc pc;
 
 	if (floppy->openers > 1) {
 		/* Don't format if someone is using the disk */
@@ -1567,7 +1548,7 @@ static int idefloppy_ioctl(struct inode *inode, struct file *file,
 	struct block_device *bdev = inode->i_bdev;
 	struct ide_floppy_obj *floppy = ide_floppy_g(bdev->bd_disk);
 	ide_drive_t *drive = floppy->drive;
-	idefloppy_pc_t pc;
+	struct ide_atapi_pc pc;
 	void __user *argp = (void __user *)arg;
 	int err;
 
-- 
1.5.3.7

[PATCH 3/4] ide-tape: convert driver to using generic ide_atapi_pc

[Borislav Petkov]

Signed-off-by: Borislav Petkov <petkovbb@gmail.com>
---
 drivers/ide/ide-tape.c |  251 ++++++++++++++++++++++--------------------------
 1 files changed, 114 insertions(+), 137 deletions(-)

diff --git a/drivers/ide/ide-tape.c b/drivers/ide/ide-tape.c
index 09ff9b0..aefbb47 100644
--- a/drivers/ide/ide-tape.c
+++ b/drivers/ide/ide-tape.c
@@ -181,34 +181,6 @@ struct idetape_bh {
 	char *b_data;
 };
 
-typedef struct idetape_packet_command_s {
-	/* Actual packet bytes */
-	u8 c[12];
-	/* On each retry, we increment retries */
-	int retries;
-	/* Error code */
-	int error;
-	/* Bytes to transfer */
-	int request_transfer;
-	/* Bytes actually transferred */
-	int actually_transferred;
-	/* Size of our data buffer */
-	int buffer_size;
-	struct idetape_bh *bh;
-	char *b_data;
-	int b_count;
-	/* Data buffer */
-	u8 *buffer;
-	/* Pointer into the above buffer */
-	u8 *current_position;
-	/* Called when this packet command is completed */
-	ide_startstop_t (*callback) (ide_drive_t *);
-	/* Temporary buffer */
-	u8 pc_buffer[IDETAPE_PC_BUFFER_SIZE];
-	/* Status/Action bit flags: long for set_bit */
-	unsigned long flags;
-} idetape_pc_t;
-
 /* Packet command flag bits. */
 enum {
 	/* Set when an error is considered normal - We won't retry */
@@ -316,11 +288,11 @@ typedef struct ide_tape_obj {
 	 *	retry, to get detailed information on what went wrong.
 	 */
 	/* Current packet command */
-	idetape_pc_t *pc;
+	struct ide_atapi_pc *pc;
 	/* Last failed packet command */
-	idetape_pc_t *failed_pc;
+	struct ide_atapi_pc *failed_pc;
 	/* Packet command stack */
-	idetape_pc_t pc_stack[IDETAPE_PC_STACK];
+	struct ide_atapi_pc pc_stack[IDETAPE_PC_STACK];
 	/* Next free packet command storage space */
 	int pc_stack_index;
 	struct request rq_stack[IDETAPE_PC_STACK];
@@ -524,7 +496,7 @@ static struct ide_tape_obj *ide_tape_chrdev_get(unsigned int i)
 	return tape;
 }
 
-static void idetape_input_buffers(ide_drive_t *drive, idetape_pc_t *pc,
+static void idetape_input_buffers(ide_drive_t *drive, struct ide_atapi_pc *pc,
 				  unsigned int bcount)
 {
 	struct idetape_bh *bh = pc->bh;
@@ -553,7 +525,7 @@ static void idetape_input_buffers(ide_drive_t *drive, idetape_pc_t *pc,
 	pc->bh = bh;
 }
 
-static void idetape_output_buffers(ide_drive_t *drive, idetape_pc_t *pc,
+static void idetape_output_buffers(ide_drive_t *drive, struct ide_atapi_pc *pc,
 				   unsigned int bcount)
 {
 	struct idetape_bh *bh = pc->bh;
@@ -581,11 +553,11 @@ static void idetape_output_buffers(ide_drive_t *drive, idetape_pc_t *pc,
 	}
 }
 
-static void idetape_update_buffers(idetape_pc_t *pc)
+static void idetape_update_buffers(struct ide_atapi_pc *pc)
 {
 	struct idetape_bh *bh = pc->bh;
 	int count;
-	unsigned int bcount = pc->actually_transferred;
+	unsigned int bcount = pc->xferred;
 
 	if (pc->flags & PC_FLAG_WRITING)
 		return;
@@ -610,7 +582,7 @@ static void idetape_update_buffers(idetape_pc_t *pc)
  *	driver. A storage space for a maximum of IDETAPE_PC_STACK packet
  *	commands is allocated at initialization time.
  */
-static idetape_pc_t *idetape_next_pc_storage(ide_drive_t *drive)
+static struct ide_atapi_pc *idetape_next_pc_storage(ide_drive_t *drive)
 {
 	idetape_tape_t *tape = drive->driver_data;
 
@@ -645,14 +617,14 @@ static struct request *idetape_next_rq_storage(ide_drive_t *drive)
 	return (&tape->rq_stack[tape->rq_stack_index++]);
 }
 
-static void idetape_init_pc(idetape_pc_t *pc)
+static void idetape_init_pc(struct ide_atapi_pc *pc)
 {
 	memset(pc->c, 0, 12);
 	pc->retries = 0;
 	pc->flags = 0;
-	pc->request_transfer = 0;
-	pc->buffer = pc->pc_buffer;
-	pc->buffer_size = IDETAPE_PC_BUFFER_SIZE;
+	pc->req_xfer = 0;
+	pc->buf = pc->pc_buf;
+	pc->buf_size = IDETAPE_PC_BUFFER_SIZE;
 	pc->bh = NULL;
 	pc->b_data = NULL;
 }
@@ -664,7 +636,7 @@ static void idetape_init_pc(idetape_pc_t *pc)
 static void idetape_analyze_error(ide_drive_t *drive, u8 *sense)
 {
 	idetape_tape_t *tape = drive->driver_data;
-	idetape_pc_t *pc = tape->failed_pc;
+	struct ide_atapi_pc *pc = tape->failed_pc;
 
 	tape->sense_key = sense[2] & 0xF;
 	tape->asc       = sense[12];
@@ -673,9 +645,9 @@ static void idetape_analyze_error(ide_drive_t *drive, u8 *sense)
 	debug_log(DBG_ERR, "pc = %x, sense key = %x, asc = %x, ascq = %x\n",
 		 pc->c[0], tape->sense_key, tape->asc, tape->ascq);
 
-	/* Correct pc->actually_transferred by asking the tape.	 */
+	/* Correct pc->xferred by asking the tape.	 */
 	if (pc->flags & PC_FLAG_DMA_ERROR) {
-		pc->actually_transferred = pc->request_transfer -
+		pc->xferred = pc->req_xfer -
 			tape->blk_size *
 			be32_to_cpu(get_unaligned((u32 *)&sense[3]));
 		idetape_update_buffers(pc);
@@ -713,7 +685,7 @@ static void idetape_analyze_error(ide_drive_t *drive, u8 *sense)
 			pc->flags |= PC_FLAG_ABORT;
 		}
 		if (!(pc->flags & PC_FLAG_ABORT) &&
-		    pc->actually_transferred)
+		    pc->xferred)
 			pc->retries = IDETAPE_MAX_PC_RETRIES + 1;
 	}
 }
@@ -922,7 +894,7 @@ static ide_startstop_t idetape_request_sense_callback(ide_drive_t *drive)
 	debug_log(DBG_PROCS, "Enter %s\n", __func__);
 
 	if (!tape->pc->error) {
-		idetape_analyze_error(drive, tape->pc->buffer);
+		idetape_analyze_error(drive, tape->pc->buf);
 		idetape_end_request(drive, 1, 0);
 	} else {
 		printk(KERN_ERR "ide-tape: Error in REQUEST SENSE itself - "
@@ -932,13 +904,13 @@ static ide_startstop_t idetape_request_sense_callback(ide_drive_t *drive)
 	return ide_stopped;
 }
 
-static void idetape_create_request_sense_cmd(idetape_pc_t *pc)
+static void idetape_create_request_sense_cmd(struct ide_atapi_pc *pc)
 {
 	idetape_init_pc(pc);
 	pc->c[0] = REQUEST_SENSE;
 	pc->c[4] = 20;
-	pc->request_transfer = 20;
-	pc->callback = &idetape_request_sense_callback;
+	pc->req_xfer = 20;
+	pc->idetape_callback = &idetape_request_sense_callback;
 }
 
 static void idetape_init_rq(struct request *rq, u8 cmd)
@@ -963,7 +935,7 @@ static void idetape_init_rq(struct request *rq, u8 cmd)
  * handling functions should queue request to the lower level part and wait for
  * their completion using idetape_queue_pc_tail or idetape_queue_rw_tail.
  */
-static void idetape_queue_pc_head(ide_drive_t *drive, idetape_pc_t *pc,
+static void idetape_queue_pc_head(ide_drive_t *drive, struct ide_atapi_pc *pc,
 				  struct request *rq)
 {
 	struct ide_tape_obj *tape = drive->driver_data;
@@ -982,7 +954,7 @@ static void idetape_queue_pc_head(ide_drive_t *drive, idetape_pc_t *pc,
 static ide_startstop_t idetape_retry_pc (ide_drive_t *drive)
 {
 	idetape_tape_t *tape = drive->driver_data;
-	idetape_pc_t *pc;
+	struct ide_atapi_pc *pc;
 	struct request *rq;
 
 	(void)ide_read_error(drive);
@@ -1008,7 +980,7 @@ static void idetape_postpone_request(ide_drive_t *drive)
 	ide_stall_queue(drive, tape->dsc_poll_freq);
 }
 
-typedef void idetape_io_buf(ide_drive_t *, idetape_pc_t *, unsigned int);
+typedef void idetape_io_buf(ide_drive_t *, struct ide_atapi_pc *, unsigned int);
 
 /*
  * This is the usual interrupt handler which will be called during a packet
@@ -1021,7 +993,7 @@ static ide_startstop_t idetape_pc_intr(ide_drive_t *drive)
 {
 	ide_hwif_t *hwif = drive->hwif;
 	idetape_tape_t *tape = drive->driver_data;
-	idetape_pc_t *pc = tape->pc;
+	struct ide_atapi_pc *pc = tape->pc;
 	xfer_func_t *xferfunc;
 	idetape_io_buf *iobuf;
 	unsigned int temp;
@@ -1061,7 +1033,7 @@ static ide_startstop_t idetape_pc_intr(ide_drive_t *drive)
 			 */
 			pc->flags |= PC_FLAG_DMA_ERROR;
 		} else {
-			pc->actually_transferred = pc->request_transfer;
+			pc->xferred = pc->req_xfer;
 			idetape_update_buffers(pc);
 		}
 		debug_log(DBG_PROCS, "DMA finished\n");
@@ -1071,7 +1043,7 @@ static ide_startstop_t idetape_pc_intr(ide_drive_t *drive)
 	/* No more interrupts */
 	if ((stat & DRQ_STAT) == 0) {
 		debug_log(DBG_SENSE, "Packet command completed, %d bytes"
-				" transferred\n", pc->actually_transferred);
+				" transferred\n", pc->xferred);
 
 		pc->flags &= ~PC_FLAG_DMA_IN_PROGRESS;
 		local_irq_enable();
@@ -1115,7 +1087,7 @@ static ide_startstop_t idetape_pc_intr(ide_drive_t *drive)
 		if (tape->failed_pc == pc)
 			tape->failed_pc = NULL;
 		/* Command finished - Call the callback function */
-		return pc->callback(drive);
+		return pc->idetape_callback(drive);
 	}
 
 	if (pc->flags & PC_FLAG_DMA_IN_PROGRESS) {
@@ -1146,9 +1118,9 @@ static ide_startstop_t idetape_pc_intr(ide_drive_t *drive)
 	}
 	if (!(pc->flags & PC_FLAG_WRITING)) {
 		/* Reading - Check that we have enough space */
-		temp = pc->actually_transferred + bcount;
-		if (temp > pc->request_transfer) {
-			if (temp > pc->buffer_size) {
+		temp = pc->xferred + bcount;
+		if (temp > pc->req_xfer) {
+			if (temp > pc->buf_size) {
 				printk(KERN_ERR "ide-tape: The tape wants to "
 					"send us more data than expected "
 					"- discarding data\n");
@@ -1170,11 +1142,11 @@ static ide_startstop_t idetape_pc_intr(ide_drive_t *drive)
 	if (pc->bh)
 		iobuf(drive, pc, bcount);
 	else
-		xferfunc(drive, pc->current_position, bcount);
+		xferfunc(drive, pc->cur_pos, bcount);
 
 	/* Update the current position */
-	pc->actually_transferred += bcount;
-	pc->current_position += bcount;
+	pc->xferred += bcount;
+	pc->cur_pos += bcount;
 
 	debug_log(DBG_SENSE, "[cmd %x] transferred %d bytes on that intr.\n",
 			pc->c[0], bcount);
@@ -1224,7 +1196,7 @@ static ide_startstop_t idetape_transfer_pc(ide_drive_t *drive)
 {
 	ide_hwif_t *hwif = drive->hwif;
 	idetape_tape_t *tape = drive->driver_data;
-	idetape_pc_t *pc = tape->pc;
+	struct ide_atapi_pc *pc = tape->pc;
 	int retries = 100;
 	ide_startstop_t startstop;
 	u8 ireason;
@@ -1264,7 +1236,8 @@ static ide_startstop_t idetape_transfer_pc(ide_drive_t *drive)
 	return ide_started;
 }
 
-static ide_startstop_t idetape_issue_pc(ide_drive_t *drive, idetape_pc_t *pc)
+static ide_startstop_t idetape_issue_pc(ide_drive_t *drive,
+		struct ide_atapi_pc *pc)
 {
 	ide_hwif_t *hwif = drive->hwif;
 	idetape_tape_t *tape = drive->driver_data;
@@ -1304,16 +1277,16 @@ static ide_startstop_t idetape_issue_pc(ide_drive_t *drive, idetape_pc_t *pc)
 			pc->error = IDETAPE_ERROR_GENERAL;
 		}
 		tape->failed_pc = NULL;
-		return pc->callback(drive);
+		return pc->idetape_callback(drive);
 	}
 	debug_log(DBG_SENSE, "Retry #%d, cmd = %02X\n", pc->retries, pc->c[0]);
 
 	pc->retries++;
 	/* We haven't transferred any data yet */
-	pc->actually_transferred = 0;
-	pc->current_position = pc->buffer;
+	pc->xferred = 0;
+	pc->cur_pos = pc->buf;
 	/* Request to transfer the entire buffer at once */
-	bcount = pc->request_transfer;
+	bcount = pc->req_xfer;
 
 	if (pc->flags & PC_FLAG_DMA_ERROR) {
 		pc->flags &= ~PC_FLAG_DMA_ERROR;
@@ -1351,7 +1324,7 @@ static ide_startstop_t idetape_pc_callback(ide_drive_t *drive)
 }
 
 /* A mode sense command is used to "sense" tape parameters. */
-static void idetape_create_mode_sense_cmd(idetape_pc_t *pc, u8 page_code)
+static void idetape_create_mode_sense_cmd(struct ide_atapi_pc *pc, u8 page_code)
 {
 	idetape_init_pc(pc);
 	pc->c[0] = MODE_SENSE;
@@ -1370,12 +1343,12 @@ static void idetape_create_mode_sense_cmd(idetape_pc_t *pc, u8 page_code)
 	/* We will just discard data in that case */
 	pc->c[4] = 255;
 	if (page_code == IDETAPE_BLOCK_DESCRIPTOR)
-		pc->request_transfer = 12;
+		pc->req_xfer = 12;
 	else if (page_code == IDETAPE_CAPABILITIES_PAGE)
-		pc->request_transfer = 24;
+		pc->req_xfer = 24;
 	else
-		pc->request_transfer = 50;
-	pc->callback = &idetape_pc_callback;
+		pc->req_xfer = 50;
+	pc->idetape_callback = &idetape_pc_callback;
 }
 
 static void idetape_calculate_speeds(ide_drive_t *drive)
@@ -1444,7 +1417,7 @@ static void idetape_calculate_speeds(ide_drive_t *drive)
 static ide_startstop_t idetape_media_access_finished(ide_drive_t *drive)
 {
 	idetape_tape_t *tape = drive->driver_data;
-	idetape_pc_t *pc = tape->pc;
+	struct ide_atapi_pc *pc = tape->pc;
 	u8 stat;
 
 	stat = ide_read_status(drive);
@@ -1465,14 +1438,14 @@ static ide_startstop_t idetape_media_access_finished(ide_drive_t *drive)
 		pc->error = IDETAPE_ERROR_GENERAL;
 		tape->failed_pc = NULL;
 	}
-	return pc->callback(drive);
+	return pc->idetape_callback(drive);
 }
 
 static ide_startstop_t idetape_rw_callback(ide_drive_t *drive)
 {
 	idetape_tape_t *tape = drive->driver_data;
 	struct request *rq = HWGROUP(drive)->rq;
-	int blocks = tape->pc->actually_transferred / tape->blk_size;
+	int blocks = tape->pc->xferred / tape->blk_size;
 
 	tape->avg_size += blocks * tape->blk_size;
 	tape->insert_size += blocks * tape->blk_size;
@@ -1504,39 +1477,41 @@ static ide_startstop_t idetape_rw_callback(ide_drive_t *drive)
 	return ide_stopped;
 }
 
-static void idetape_create_read_cmd(idetape_tape_t *tape, idetape_pc_t *pc,
+static void idetape_create_read_cmd(idetape_tape_t *tape,
+		struct ide_atapi_pc *pc,
 		unsigned int length, struct idetape_bh *bh)
 {
 	idetape_init_pc(pc);
 	pc->c[0] = READ_6;
 	put_unaligned(cpu_to_be32(length), (unsigned int *) &pc->c[1]);
 	pc->c[1] = 1;
-	pc->callback = &idetape_rw_callback;
+	pc->idetape_callback = &idetape_rw_callback;
 	pc->bh = bh;
 	atomic_set(&bh->b_count, 0);
-	pc->buffer = NULL;
-	pc->buffer_size = length * tape->blk_size;
-	pc->request_transfer = pc->buffer_size;
-	if (pc->request_transfer == tape->stage_size)
+	pc->buf = NULL;
+	pc->buf_size = length * tape->blk_size;
+	pc->req_xfer = pc->buf_size;
+	if (pc->req_xfer == tape->stage_size)
 		pc->flags |= PC_FLAG_DMA_RECOMMENDED;
 }
 
-static void idetape_create_write_cmd(idetape_tape_t *tape, idetape_pc_t *pc,
+static void idetape_create_write_cmd(idetape_tape_t *tape,
+		struct ide_atapi_pc *pc,
 		unsigned int length, struct idetape_bh *bh)
 {
 	idetape_init_pc(pc);
 	pc->c[0] = WRITE_6;
 	put_unaligned(cpu_to_be32(length), (unsigned int *) &pc->c[1]);
 	pc->c[1] = 1;
-	pc->callback = &idetape_rw_callback;
+	pc->idetape_callback = &idetape_rw_callback;
 	pc->flags |= PC_FLAG_WRITING;
 	pc->bh = bh;
 	pc->b_data = bh->b_data;
 	pc->b_count = atomic_read(&bh->b_count);
-	pc->buffer = NULL;
-	pc->buffer_size = length * tape->blk_size;
-	pc->request_transfer = pc->buffer_size;
-	if (pc->request_transfer == tape->stage_size)
+	pc->buf = NULL;
+	pc->buf_size = length * tape->blk_size;
+	pc->req_xfer = pc->buf_size;
+	if (pc->req_xfer == tape->stage_size)
 		pc->flags |= PC_FLAG_DMA_RECOMMENDED;
 }
 
@@ -1544,7 +1519,7 @@ static ide_startstop_t idetape_do_request(ide_drive_t *drive,
 					  struct request *rq, sector_t block)
 {
 	idetape_tape_t *tape = drive->driver_data;
-	idetape_pc_t *pc = NULL;
+	struct ide_atapi_pc *pc = NULL;
 	struct request *postponed_rq = tape->postponed_rq;
 	u8 stat;
 
@@ -1631,7 +1606,7 @@ static ide_startstop_t idetape_do_request(ide_drive_t *drive,
 		goto out;
 	}
 	if (rq->cmd[0] & REQ_IDETAPE_PC1) {
-		pc = (idetape_pc_t *) rq->buffer;
+		pc = (struct ide_atapi_pc *) rq->buffer;
 		rq->cmd[0] &= ~(REQ_IDETAPE_PC1);
 		rq->cmd[0] |= REQ_IDETAPE_PC2;
 		goto out;
@@ -1883,7 +1858,7 @@ static void idetape_wait_for_request(ide_drive_t *drive, struct request *rq)
 static ide_startstop_t idetape_read_position_callback(ide_drive_t *drive)
 {
 	idetape_tape_t *tape = drive->driver_data;
-	u8 *readpos = tape->pc->buffer;
+	u8 *readpos = tape->pc->buf;
 
 	debug_log(DBG_PROCS, "Enter %s\n", __func__);
 
@@ -1919,20 +1894,20 @@ static ide_startstop_t idetape_read_position_callback(ide_drive_t *drive)
  * writing a filemark otherwise.
  */
 static void idetape_create_write_filemark_cmd(ide_drive_t *drive,
-		idetape_pc_t *pc, int write_filemark)
+		struct ide_atapi_pc *pc, int write_filemark)
 {
 	idetape_init_pc(pc);
 	pc->c[0] = WRITE_FILEMARKS;
 	pc->c[4] = write_filemark;
 	pc->flags |= PC_FLAG_WAIT_FOR_DSC;
-	pc->callback = &idetape_pc_callback;
+	pc->idetape_callback = &idetape_pc_callback;
 }
 
-static void idetape_create_test_unit_ready_cmd(idetape_pc_t *pc)
+static void idetape_create_test_unit_ready_cmd(struct ide_atapi_pc *pc)
 {
 	idetape_init_pc(pc);
 	pc->c[0] = TEST_UNIT_READY;
-	pc->callback = &idetape_pc_callback;
+	pc->idetape_callback = &idetape_pc_callback;
 }
 
 /*
@@ -1948,7 +1923,7 @@ static void idetape_create_test_unit_ready_cmd(idetape_pc_t *pc)
  * to the request list without waiting for it to be serviced! In that case, we
  * usually use idetape_queue_pc_head().
  */
-static int __idetape_queue_pc_tail(ide_drive_t *drive, idetape_pc_t *pc)
+static int __idetape_queue_pc_tail(ide_drive_t *drive, struct ide_atapi_pc *pc)
 {
 	struct ide_tape_obj *tape = drive->driver_data;
 	struct request rq;
@@ -1959,20 +1934,20 @@ static int __idetape_queue_pc_tail(ide_drive_t *drive, idetape_pc_t *pc)
 	return ide_do_drive_cmd(drive, &rq, ide_wait);
 }
 
-static void idetape_create_load_unload_cmd(ide_drive_t *drive, idetape_pc_t *pc,
-		int cmd)
+static void idetape_create_load_unload_cmd(ide_drive_t *drive,
+		struct ide_atapi_pc *pc, int cmd)
 {
 	idetape_init_pc(pc);
 	pc->c[0] = START_STOP;
 	pc->c[4] = cmd;
 	pc->flags |= PC_FLAG_WAIT_FOR_DSC;
-	pc->callback = &idetape_pc_callback;
+	pc->idetape_callback = &idetape_pc_callback;
 }
 
 static int idetape_wait_ready(ide_drive_t *drive, unsigned long timeout)
 {
 	idetape_tape_t *tape = drive->driver_data;
-	idetape_pc_t pc;
+	struct ide_atapi_pc pc;
 	int load_attempted = 0;
 
 	/* Wait for the tape to become ready */
@@ -2000,14 +1975,14 @@ static int idetape_wait_ready(ide_drive_t *drive, unsigned long timeout)
 	return -EIO;
 }
 
-static int idetape_queue_pc_tail(ide_drive_t *drive, idetape_pc_t *pc)
+static int idetape_queue_pc_tail(ide_drive_t *drive, struct ide_atapi_pc *pc)
 {
 	return __idetape_queue_pc_tail(drive, pc);
 }
 
 static int idetape_flush_tape_buffers(ide_drive_t *drive)
 {
-	idetape_pc_t pc;
+	struct ide_atapi_pc pc;
 	int rc;
 
 	idetape_create_write_filemark_cmd(drive, &pc, 0);
@@ -2018,18 +1993,18 @@ static int idetape_flush_tape_buffers(ide_drive_t *drive)
 	return 0;
 }
 
-static void idetape_create_read_position_cmd(idetape_pc_t *pc)
+static void idetape_create_read_position_cmd(struct ide_atapi_pc *pc)
 {
 	idetape_init_pc(pc);
 	pc->c[0] = READ_POSITION;
-	pc->request_transfer = 20;
-	pc->callback = &idetape_read_position_callback;
+	pc->req_xfer = 20;
+	pc->idetape_callback = &idetape_read_position_callback;
 }
 
 static int idetape_read_position(ide_drive_t *drive)
 {
 	idetape_tape_t *tape = drive->driver_data;
-	idetape_pc_t pc;
+	struct ide_atapi_pc pc;
 	int position;
 
 	debug_log(DBG_PROCS, "Enter %s\n", __func__);
@@ -2041,7 +2016,8 @@ static int idetape_read_position(ide_drive_t *drive)
 	return position;
 }
 
-static void idetape_create_locate_cmd(ide_drive_t *drive, idetape_pc_t *pc,
+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);
@@ -2050,11 +2026,11 @@ static void idetape_create_locate_cmd(ide_drive_t *drive, idetape_pc_t *pc,
 	put_unaligned(cpu_to_be32(block), (unsigned int *) &pc->c[3]);
 	pc->c[8] = partition;
 	pc->flags |= PC_FLAG_WAIT_FOR_DSC;
-	pc->callback = &idetape_pc_callback;
+	pc->idetape_callback = &idetape_pc_callback;
 }
 
-static int idetape_create_prevent_cmd(ide_drive_t *drive, idetape_pc_t *pc,
-				      int prevent)
+static int idetape_create_prevent_cmd(ide_drive_t *drive,
+		struct ide_atapi_pc *pc, int prevent)
 {
 	idetape_tape_t *tape = drive->driver_data;
 
@@ -2065,7 +2041,7 @@ static int idetape_create_prevent_cmd(ide_drive_t *drive, idetape_pc_t *pc,
 	idetape_init_pc(pc);
 	pc->c[0] = ALLOW_MEDIUM_REMOVAL;
 	pc->c[4] = prevent;
-	pc->callback = &idetape_pc_callback;
+	pc->idetape_callback = &idetape_pc_callback;
 	return 1;
 }
 
@@ -2126,7 +2102,7 @@ static int idetape_position_tape(ide_drive_t *drive, unsigned int block,
 {
 	idetape_tape_t *tape = drive->driver_data;
 	int retval;
-	idetape_pc_t pc;
+	struct ide_atapi_pc pc;
 
 	if (tape->chrdev_dir == IDETAPE_DIR_READ)
 		__idetape_discard_read_pipeline(drive);
@@ -2209,40 +2185,41 @@ static void idetape_plug_pipeline(ide_drive_t *drive)
 	}
 }
 
-static void idetape_create_inquiry_cmd(idetape_pc_t *pc)
+static void idetape_create_inquiry_cmd(struct ide_atapi_pc *pc)
 {
 	idetape_init_pc(pc);
 	pc->c[0] = INQUIRY;
 	pc->c[4] = 254;
-	pc->request_transfer = 254;
-	pc->callback = &idetape_pc_callback;
+	pc->req_xfer = 254;
+	pc->idetape_callback = &idetape_pc_callback;
 }
 
-static void idetape_create_rewind_cmd(ide_drive_t *drive, idetape_pc_t *pc)
+static void idetape_create_rewind_cmd(ide_drive_t *drive,
+		struct ide_atapi_pc *pc)
 {
 	idetape_init_pc(pc);
 	pc->c[0] = REZERO_UNIT;
 	pc->flags |= PC_FLAG_WAIT_FOR_DSC;
-	pc->callback = &idetape_pc_callback;
+	pc->idetape_callback = &idetape_pc_callback;
 }
 
-static void idetape_create_erase_cmd(idetape_pc_t *pc)
+static void idetape_create_erase_cmd(struct ide_atapi_pc *pc)
 {
 	idetape_init_pc(pc);
 	pc->c[0] = ERASE;
 	pc->c[1] = 1;
 	pc->flags |= PC_FLAG_WAIT_FOR_DSC;
-	pc->callback = &idetape_pc_callback;
+	pc->idetape_callback = &idetape_pc_callback;
 }
 
-static void idetape_create_space_cmd(idetape_pc_t *pc, int count, u8 cmd)
+static void idetape_create_space_cmd(struct ide_atapi_pc *pc, int count, u8 cmd)
 {
 	idetape_init_pc(pc);
 	pc->c[0] = SPACE;
 	put_unaligned(cpu_to_be32(count), (unsigned int *) &pc->c[1]);
 	pc->c[1] = cmd;
 	pc->flags |= PC_FLAG_WAIT_FOR_DSC;
-	pc->callback = &idetape_pc_callback;
+	pc->idetape_callback = &idetape_pc_callback;
 }
 
 static void idetape_wait_first_stage(ide_drive_t *drive)
@@ -2620,7 +2597,7 @@ static int idetape_pipeline_size(ide_drive_t *drive)
 static int idetape_rewind_tape(ide_drive_t *drive)
 {
 	int retval;
-	idetape_pc_t pc;
+	struct ide_atapi_pc pc;
 	idetape_tape_t *tape;
 	tape = drive->driver_data;
 
@@ -2683,7 +2660,7 @@ static int idetape_space_over_filemarks(ide_drive_t *drive, short mt_op,
 					int mt_count)
 {
 	idetape_tape_t *tape = drive->driver_data;
-	idetape_pc_t pc;
+	struct ide_atapi_pc pc;
 	unsigned long flags;
 	int retval, count = 0;
 	int sprev = !!(tape->caps[4] & 0x20);
@@ -2941,7 +2918,7 @@ static ssize_t idetape_chrdev_write(struct file *file, const char __user *buf,
 
 static int idetape_write_filemark(ide_drive_t *drive)
 {
-	idetape_pc_t pc;
+	struct ide_atapi_pc pc;
 
 	/* Write a filemark */
 	idetape_create_write_filemark_cmd(drive, &pc, 1);
@@ -2969,7 +2946,7 @@ static int idetape_write_filemark(ide_drive_t *drive)
 static int idetape_mtioctop(ide_drive_t *drive, short mt_op, int mt_count)
 {
 	idetape_tape_t *tape = drive->driver_data;
-	idetape_pc_t pc;
+	struct ide_atapi_pc pc;
 	int i, retval;
 
 	debug_log(DBG_ERR, "Handling MTIOCTOP ioctl: mt_op=%d, mt_count=%d\n",
@@ -3152,7 +3129,7 @@ static int idetape_chrdev_ioctl(struct inode *inode, struct file *file,
 static void ide_tape_get_bsize_from_bdesc(ide_drive_t *drive)
 {
 	idetape_tape_t *tape = drive->driver_data;
-	idetape_pc_t pc;
+	struct ide_atapi_pc pc;
 
 	idetape_create_mode_sense_cmd(&pc, IDETAPE_BLOCK_DESCRIPTOR);
 	if (idetape_queue_pc_tail(drive, &pc)) {
@@ -3164,10 +3141,10 @@ static void ide_tape_get_bsize_from_bdesc(ide_drive_t *drive)
 		}
 		return;
 	}
-	tape->blk_size = (pc.buffer[4 + 5] << 16) +
-				(pc.buffer[4 + 6] << 8)  +
-				 pc.buffer[4 + 7];
-	tape->drv_write_prot = (pc.buffer[2] & 0x80) >> 7;
+	tape->blk_size = (pc.buf[4 + 5] << 16) +
+				(pc.buf[4 + 6] << 8)  +
+				 pc.buf[4 + 7];
+	tape->drv_write_prot = (pc.buf[2] & 0x80) >> 7;
 }
 
 static int idetape_chrdev_open(struct inode *inode, struct file *filp)
@@ -3175,7 +3152,7 @@ static int idetape_chrdev_open(struct inode *inode, struct file *filp)
 	unsigned int minor = iminor(inode), i = minor & ~0xc0;
 	ide_drive_t *drive;
 	idetape_tape_t *tape;
-	idetape_pc_t pc;
+	struct ide_atapi_pc pc;
 	int retval;
 
 	if (i >= MAX_HWIFS * MAX_DRIVES)
@@ -3275,7 +3252,7 @@ static int idetape_chrdev_release(struct inode *inode, struct file *filp)
 {
 	struct ide_tape_obj *tape = ide_tape_f(filp);
 	ide_drive_t *drive = tape->drive;
-	idetape_pc_t pc;
+	struct ide_atapi_pc pc;
 	unsigned int minor = iminor(inode);
 
 	lock_kernel();
@@ -3353,7 +3330,7 @@ static int idetape_identify_device(ide_drive_t *drive)
 static void idetape_get_inquiry_results(ide_drive_t *drive)
 {
 	idetape_tape_t *tape = drive->driver_data;
-	idetape_pc_t pc;
+	struct ide_atapi_pc pc;
 	char fw_rev[6], vendor_id[10], product_id[18];
 
 	idetape_create_inquiry_cmd(&pc);
@@ -3362,9 +3339,9 @@ static void idetape_get_inquiry_results(ide_drive_t *drive)
 				tape->name);
 		return;
 	}
-	memcpy(vendor_id, &pc.buffer[8], 8);
-	memcpy(product_id, &pc.buffer[16], 16);
-	memcpy(fw_rev, &pc.buffer[32], 4);
+	memcpy(vendor_id, &pc.buf[8], 8);
+	memcpy(product_id, &pc.buf[16], 16);
+	memcpy(fw_rev, &pc.buf[32], 4);
 
 	ide_fixstring(vendor_id, 10, 0);
 	ide_fixstring(product_id, 18, 0);
@@ -3381,7 +3358,7 @@ static void idetape_get_inquiry_results(ide_drive_t *drive)
 static void idetape_get_mode_sense_results(ide_drive_t *drive)
 {
 	idetape_tape_t *tape = drive->driver_data;
-	idetape_pc_t pc;
+	struct ide_atapi_pc pc;
 	u8 *caps;
 	u8 speed, max_speed;
 
@@ -3395,7 +3372,7 @@ static void idetape_get_mode_sense_results(ide_drive_t *drive)
 		put_unaligned(6*52, (u16 *)&tape->caps[16]);
 		return;
 	}
-	caps = pc.buffer + 4 + pc.buffer[3];
+	caps = pc.buf + 4 + pc.buf[3];
 
 	/* convert to host order and save for later use */
 	speed = be16_to_cpu(*(u16 *)&caps[14]);
-- 
1.5.3.7

[PATCH 4/4] ide-scsi: convert driver to using generic ide_atapi_pc

[Borislav Petkov]

Signed-off-by: Borislav Petkov <petkovbb@gmail.com>
---
 drivers/scsi/ide-scsi.c |  133 ++++++++++++++++++++++-------------------------
 1 files changed, 62 insertions(+), 71 deletions(-)

diff --git a/drivers/scsi/ide-scsi.c b/drivers/scsi/ide-scsi.c
index 7fea769..5ec421c 100644
--- a/drivers/scsi/ide-scsi.c
+++ b/drivers/scsi/ide-scsi.c
@@ -60,23 +60,6 @@
 
 #define IDESCSI_DEBUG_LOG		0
 
-typedef struct idescsi_pc_s {
-	u8 c[12];				/* Actual packet bytes */
-	int request_transfer;			/* Bytes to transfer */
-	int actually_transferred;		/* Bytes actually transferred */
-	int buffer_size;			/* Size of our data buffer */
-	struct request *rq;			/* The corresponding request */
-	u8 *buffer;				/* Data buffer */
-	u8 *current_position;			/* Pointer into the above buffer */
-	struct scatterlist *sg;			/* Scatter gather table */
-	unsigned int sg_cnt;			/* Number of entries in sg */
-	int b_count;				/* Bytes transferred from current entry */
-	struct scsi_cmnd *scsi_cmd;		/* SCSI command */
-	void (*done)(struct scsi_cmnd *);	/* Scsi completion routine */
-	unsigned long flags;			/* Status/Action flags */
-	unsigned long timeout;			/* Command timeout */
-} idescsi_pc_t;
-
 /*
  *	Packet command status bits.
  */
@@ -101,14 +84,15 @@ typedef struct ide_scsi_obj {
 	struct gendisk		*disk;
 	struct Scsi_Host	*host;
 
-	idescsi_pc_t *pc;			/* Current packet command */
+	struct ide_atapi_pc *pc;		/* Current packet command */
 	unsigned long flags;			/* Status/Action flags */
 	unsigned long transform;		/* SCSI cmd translation layer */
 	unsigned long log;			/* log flags */
 } idescsi_scsi_t;
 
 static DEFINE_MUTEX(idescsi_ref_mutex);
-static int idescsi_nocd;			/* Set by module param to skip cd */
+/* Set by module param to skip cd */
+static int idescsi_nocd;
 
 #define ide_scsi_g(disk) \
 	container_of((disk)->private_data, struct ide_scsi_obj, driver)
@@ -155,7 +139,8 @@ static inline idescsi_scsi_t *drive_to_idescsi(ide_drive_t *ide_drive)
 /*
  *	PIO data transfer routines using the scatter gather table.
  */
-static void idescsi_input_buffers (ide_drive_t *drive, idescsi_pc_t *pc, unsigned int bcount)
+static void idescsi_input_buffers(ide_drive_t *drive, struct ide_atapi_pc *pc,
+		unsigned int bcount)
 {
 	int count;
 	char *buf;
@@ -192,7 +177,8 @@ static void idescsi_input_buffers (ide_drive_t *drive, idescsi_pc_t *pc, unsigne
 	}
 }
 
-static void idescsi_output_buffers (ide_drive_t *drive, idescsi_pc_t *pc, unsigned int bcount)
+static void idescsi_output_buffers(ide_drive_t *drive, struct ide_atapi_pc *pc,
+		unsigned int bcount)
 {
 	int count;
 	char *buf;
@@ -234,15 +220,16 @@ static void ide_scsi_hex_dump(u8 *data, int len)
 	print_hex_dump(KERN_CONT, "", DUMP_PREFIX_NONE, 16, 1, data, len, 0);
 }
 
-static int idescsi_check_condition(ide_drive_t *drive, struct request *failed_command)
+static int idescsi_check_condition(ide_drive_t *drive,
+		struct request *failed_cmd)
 {
 	idescsi_scsi_t *scsi = drive_to_idescsi(drive);
-	idescsi_pc_t   *pc;
+	struct ide_atapi_pc   *pc;
 	struct request *rq;
 	u8             *buf;
 
 	/* stuff a sense request in front of our current request */
-	pc = kzalloc(sizeof(idescsi_pc_t), GFP_ATOMIC);
+	pc = kzalloc(sizeof(struct ide_atapi_pc), GFP_ATOMIC);
 	rq = kmalloc(sizeof(struct request), GFP_ATOMIC);
 	buf = kzalloc(SCSI_SENSE_BUFFERSIZE, GFP_ATOMIC);
 	if (!pc || !rq || !buf) {
@@ -254,14 +241,14 @@ static int idescsi_check_condition(ide_drive_t *drive, struct request *failed_co
 	ide_init_drive_cmd(rq);
 	rq->special = (char *) pc;
 	pc->rq = rq;
-	pc->buffer = buf;
+	pc->buf = buf;
 	pc->c[0] = REQUEST_SENSE;
-	pc->c[4] = pc->request_transfer = pc->buffer_size = SCSI_SENSE_BUFFERSIZE;
+	pc->c[4] = pc->req_xfer = pc->buf_size = SCSI_SENSE_BUFFERSIZE;
 	rq->cmd_type = REQ_TYPE_SENSE;
 	pc->timeout = jiffies + WAIT_READY;
 	/* NOTE! Save the failed packet command in "rq->buffer" */
-	rq->buffer = (void *) failed_command->special;
-	pc->scsi_cmd = ((idescsi_pc_t *) failed_command->special)->scsi_cmd;
+	rq->buffer = (void *) failed_cmd->special;
+	pc->scsi_cmd = ((struct ide_atapi_pc *) failed_cmd->special)->scsi_cmd;
 	if (test_bit(IDESCSI_LOG_CMD, &scsi->log)) {
 		printk ("ide-scsi: %s: queue cmd = ", drive->name);
 		ide_scsi_hex_dump(pc->c, 6);
@@ -294,7 +281,7 @@ idescsi_atapi_abort(ide_drive_t *drive, struct request *rq)
 {
 #if IDESCSI_DEBUG_LOG
 	printk(KERN_WARNING "idescsi_atapi_abort called for %lu\n",
-			((idescsi_pc_t *) rq->special)->scsi_cmd->serial_number);
+		((struct ide_atapi_pc *) rq->special)->scsi_cmd->serial_number);
 #endif
 	rq->errors |= ERROR_MAX;
 
@@ -307,7 +294,7 @@ static int idescsi_end_request (ide_drive_t *drive, int uptodate, int nrsecs)
 {
 	idescsi_scsi_t *scsi = drive_to_idescsi(drive);
 	struct request *rq = HWGROUP(drive)->rq;
-	idescsi_pc_t *pc = (idescsi_pc_t *) rq->special;
+	struct ide_atapi_pc *pc = (struct ide_atapi_pc *) rq->special;
 	int log = test_bit(IDESCSI_LOG_CMD, &scsi->log);
 	struct Scsi_Host *host;
 	int errors = rq->errors;
@@ -319,13 +306,14 @@ static int idescsi_end_request (ide_drive_t *drive, int uptodate, int nrsecs)
 	}
 	ide_end_drive_cmd (drive, 0, 0);
 	if (blk_sense_request(rq)) {
-		idescsi_pc_t *opc = (idescsi_pc_t *) rq->buffer;
+		struct ide_atapi_pc *opc = (struct ide_atapi_pc *) rq->buffer;
 		if (log) {
 			printk ("ide-scsi: %s: wrap up check %lu, rst = ", drive->name, opc->scsi_cmd->serial_number);
-			ide_scsi_hex_dump(pc->buffer, 16);
+			ide_scsi_hex_dump(pc->buf, 16);
 		}
-		memcpy((void *) opc->scsi_cmd->sense_buffer, pc->buffer, SCSI_SENSE_BUFFERSIZE);
-		kfree(pc->buffer);
+		memcpy((void *) opc->scsi_cmd->sense_buffer, pc->buf,
+			SCSI_SENSE_BUFFERSIZE);
+		kfree(pc->buf);
 		kfree(pc);
 		kfree(rq);
 		pc = opc;
@@ -361,7 +349,7 @@ static int idescsi_end_request (ide_drive_t *drive, int uptodate, int nrsecs)
 	return 0;
 }
 
-static inline unsigned long get_timeout(idescsi_pc_t *pc)
+static inline unsigned long get_timeout(struct ide_atapi_pc *pc)
 {
 	return max_t(unsigned long, WAIT_CMD, pc->timeout - jiffies);
 }
@@ -369,7 +357,7 @@ static inline unsigned long get_timeout(idescsi_pc_t *pc)
 static int idescsi_expiry(ide_drive_t *drive)
 {
 	idescsi_scsi_t *scsi = drive_to_idescsi(drive);
-	idescsi_pc_t   *pc   = scsi->pc;
+	struct ide_atapi_pc   *pc   = scsi->pc;
 
 #if IDESCSI_DEBUG_LOG
 	printk(KERN_WARNING "idescsi_expiry called for %lu at %lu\n", pc->scsi_cmd->serial_number, jiffies);
@@ -386,7 +374,7 @@ static ide_startstop_t idescsi_pc_intr (ide_drive_t *drive)
 {
 	idescsi_scsi_t *scsi = drive_to_idescsi(drive);
 	ide_hwif_t *hwif = drive->hwif;
-	idescsi_pc_t *pc = scsi->pc;
+	struct ide_atapi_pc *pc = scsi->pc;
 	struct request *rq = pc->rq;
 	unsigned int temp;
 	u16 bcount;
@@ -409,7 +397,7 @@ static ide_startstop_t idescsi_pc_intr (ide_drive_t *drive)
 #if IDESCSI_DEBUG_LOG
 		printk ("ide-scsi: %s: DMA complete\n", drive->name);
 #endif /* IDESCSI_DEBUG_LOG */
-		pc->actually_transferred=pc->request_transfer;
+		pc->xferred = pc->req_xfer;
 		(void) HWIF(drive)->ide_dma_end(drive);
 	}
 
@@ -419,7 +407,8 @@ static ide_startstop_t idescsi_pc_intr (ide_drive_t *drive)
 	if ((stat & DRQ_STAT) == 0) {
 		/* No more interrupts */
 		if (test_bit(IDESCSI_LOG_CMD, &scsi->log))
-			printk (KERN_INFO "Packet command completed, %d bytes transferred\n", pc->actually_transferred);
+			printk(KERN_INFO "Packet command completed, %d bytes"
+					" transferred\n", pc->xferred);
 		local_irq_enable_in_hardirq();
 		if (stat & ERR_STAT)
 			rq->errors++;
@@ -435,25 +424,26 @@ static ide_startstop_t idescsi_pc_intr (ide_drive_t *drive)
 		return ide_do_reset (drive);
 	}
 	if (ireason & IO) {
-		temp = pc->actually_transferred + bcount;
-		if (temp > pc->request_transfer) {
-			if (temp > pc->buffer_size) {
+		temp = pc->xferred + bcount;
+		if (temp > pc->req_xfer) {
+			if (temp > pc->buf_size) {
 				printk(KERN_ERR "ide-scsi: The scsi wants to "
 					"send us more data than expected "
 					"- discarding data\n");
-				temp = pc->buffer_size - pc->actually_transferred;
+				temp = pc->buf_size - pc->xferred;
 				if (temp) {
 					clear_bit(PC_WRITING, &pc->flags);
 					if (pc->sg)
-						idescsi_input_buffers(drive, pc, temp);
+						idescsi_input_buffers(drive, pc,
+									temp);
 					else
-						drive->hwif->atapi_input_bytes(drive, pc->current_position, temp);
+						drive->hwif->atapi_input_bytes(drive, pc->cur_pos, temp);
 					printk(KERN_ERR "ide-scsi: transferred"
 							" %d of %d bytes\n",
 							temp, bcount);
 				}
-				pc->actually_transferred += temp;
-				pc->current_position += temp;
+				pc->xferred += temp;
+				pc->cur_pos += temp;
 				ide_atapi_discard_data(drive, bcount - temp);
 				ide_set_handler(drive, &idescsi_pc_intr, get_timeout(pc), idescsi_expiry);
 				return ide_started;
@@ -468,19 +458,19 @@ static ide_startstop_t idescsi_pc_intr (ide_drive_t *drive)
 		if (pc->sg)
 			idescsi_input_buffers(drive, pc, bcount);
 		else
-			hwif->atapi_input_bytes(drive, pc->current_position,
+			hwif->atapi_input_bytes(drive, pc->cur_pos,
 						bcount);
 	} else {
 		set_bit(PC_WRITING, &pc->flags);
 		if (pc->sg)
 			idescsi_output_buffers(drive, pc, bcount);
 		else
-			hwif->atapi_output_bytes(drive, pc->current_position,
+			hwif->atapi_output_bytes(drive, pc->cur_pos,
 						 bcount);
 	}
 	/* Update the current position */
-	pc->actually_transferred += bcount;
-	pc->current_position += bcount;
+	pc->xferred += bcount;
+	pc->cur_pos += bcount;
 
 	/* And set the interrupt handler again */
 	ide_set_handler(drive, &idescsi_pc_intr, get_timeout(pc), idescsi_expiry);
@@ -491,7 +481,7 @@ static ide_startstop_t idescsi_transfer_pc(ide_drive_t *drive)
 {
 	ide_hwif_t *hwif = drive->hwif;
 	idescsi_scsi_t *scsi = drive_to_idescsi(drive);
-	idescsi_pc_t *pc = scsi->pc;
+	struct ide_atapi_pc *pc = scsi->pc;
 	ide_startstop_t startstop;
 	u8 ireason;
 
@@ -518,7 +508,7 @@ static ide_startstop_t idescsi_transfer_pc(ide_drive_t *drive)
 	return ide_started;
 }
 
-static inline int idescsi_set_direction(idescsi_pc_t *pc)
+static inline int idescsi_set_direction(struct ide_atapi_pc *pc)
 {
 	switch (pc->c[0]) {
 		case READ_6: case READ_10: case READ_12:
@@ -532,13 +522,13 @@ static inline int idescsi_set_direction(idescsi_pc_t *pc)
 	}
 }
 
-static int idescsi_map_sg(ide_drive_t *drive, idescsi_pc_t *pc)
+static int idescsi_map_sg(ide_drive_t *drive, struct ide_atapi_pc *pc)
 {
 	ide_hwif_t *hwif = drive->hwif;
 	struct scatterlist *sg, *scsi_sg;
 	int segments;
 
-	if (!pc->request_transfer || pc->request_transfer % 1024)
+	if (!pc->req_xfer || pc->req_xfer % 1024)
 		return 1;
 
 	if (idescsi_set_direction(pc))
@@ -557,21 +547,21 @@ static int idescsi_map_sg(ide_drive_t *drive, idescsi_pc_t *pc)
 	return 0;
 }
 
-/*
- *	Issue a packet command
- */
-static ide_startstop_t idescsi_issue_pc (ide_drive_t *drive, idescsi_pc_t *pc)
+static ide_startstop_t idescsi_issue_pc(ide_drive_t *drive,
+		struct ide_atapi_pc *pc)
 {
 	idescsi_scsi_t *scsi = drive_to_idescsi(drive);
 	ide_hwif_t *hwif = drive->hwif;
 	u16 bcount;
 	u8 dma = 0;
 
-	scsi->pc=pc;							/* Set the current packet command */
-	pc->actually_transferred=0;					/* We haven't transferred any data yet */
-	pc->current_position=pc->buffer;
+	/* Set the current packet command */
+	scsi->pc = pc;
+	/* We haven't transferred any data yet */
+	pc->xferred = 0;
+	pc->cur_pos = pc->buf;
 	/* Request to transfer the entire buffer at once */
-	bcount = min(pc->request_transfer, 63 * 1024);
+	bcount = min(pc->req_xfer, 63 * 1024);
 
 	if (drive->using_dma && !idescsi_map_sg(drive, pc)) {
 		hwif->sg_mapped = 1;
@@ -606,7 +596,8 @@ static ide_startstop_t idescsi_do_request (ide_drive_t *drive, struct request *r
 #endif /* IDESCSI_DEBUG_LOG */
 
 	if (blk_sense_request(rq) || blk_special_request(rq)) {
-		return idescsi_issue_pc (drive, (idescsi_pc_t *) rq->special);
+		return idescsi_issue_pc(drive,
+				(struct ide_atapi_pc *) rq->special);
 	}
 	blk_dump_rq_flags(rq, "ide-scsi: unsup command");
 	idescsi_end_request (drive, 0, 0);
@@ -764,15 +755,15 @@ static int idescsi_queue (struct scsi_cmnd *cmd,
 	idescsi_scsi_t *scsi = scsihost_to_idescsi(host);
 	ide_drive_t *drive = scsi->drive;
 	struct request *rq = NULL;
-	idescsi_pc_t *pc = NULL;
+	struct ide_atapi_pc *pc = NULL;
 
 	if (!drive) {
 		scmd_printk (KERN_ERR, cmd, "drive not present\n");
 		goto abort;
 	}
 	scsi = drive_to_idescsi(drive);
-	pc = kmalloc (sizeof (idescsi_pc_t), GFP_ATOMIC);
-	rq = kmalloc (sizeof (struct request), GFP_ATOMIC);
+	pc = kmalloc(sizeof(struct ide_atapi_pc), GFP_ATOMIC);
+	rq = kmalloc(sizeof(struct request), GFP_ATOMIC);
 	if (rq == NULL || pc == NULL) {
 		printk (KERN_ERR "ide-scsi: %s: out of memory\n", drive->name);
 		goto abort;
@@ -782,11 +773,11 @@ static int idescsi_queue (struct scsi_cmnd *cmd,
 	pc->flags = 0;
 	pc->rq = rq;
 	memcpy (pc->c, cmd->cmnd, cmd->cmd_len);
-	pc->buffer = NULL;
+	pc->buf = NULL;
 	pc->sg = scsi_sglist(cmd);
 	pc->sg_cnt = scsi_sg_count(cmd);
 	pc->b_count = 0;
-	pc->request_transfer = pc->buffer_size = scsi_bufflen(cmd);
+	pc->req_xfer = pc->buf_size = scsi_bufflen(cmd);
 	pc->scsi_cmd = cmd;
 	pc->done = done;
 	pc->timeout = jiffies + cmd->timeout_per_command;
@@ -857,7 +848,7 @@ static int idescsi_eh_abort (struct scsi_cmnd *cmd)
 		printk (KERN_ERR "ide-scsi: cmd aborted!\n");
 
 		if (blk_sense_request(scsi->pc->rq))
-			kfree(scsi->pc->buffer);
+			kfree(scsi->pc->buf);
 		kfree(scsi->pc->rq);
 		kfree(scsi->pc);
 		scsi->pc = NULL;
@@ -907,7 +898,7 @@ static int idescsi_eh_reset (struct scsi_cmnd *cmd)
 	if (__blk_end_request(req, -EIO, 0))
 		BUG();
 	if (blk_sense_request(req))
-		kfree(scsi->pc->buffer);
+		kfree(scsi->pc->buf);
 	kfree(scsi->pc);
 	scsi->pc = NULL;
 	kfree(req);
-- 
1.5.3.7

Re: [PATCH 0/4] ide: generic packet command representation

[Bartlomiej Zolnierkiewicz]

On Monday 11 February 2008, Borislav Petkov wrote:
> Hi Bart,
> 
> here's the ide_atapi_pc unification series. It all went pretty smoothly along
> the search & replace line. Using driver-specific members in ide_atapi_pc like
> idefloppy_callback and idetape_callback is kinda dumb but this approach seemed
> the fastest versus unnecessary callback function signature change that will
> touch stuff all over the place. Besides, ide-tape might be gone soon so that
> would alleviate the problem.

applied all four patches, thanks!

> On a different note, i noticed ide-scsi might also need a cleanup similar to the
> other drivers. It is next on my TODO list in case you don't have anything with a
> higher prio.

I was actually hoping that you'll continue unifying ATAPI handling...

[ ide-scsi is orphaned and has (probably) unfixable problems (because of having
  dependencies on both IDE and SCSI subsystems) so it is not worth IMO but I will
  of course accept patches... ]

Thanks,
Bart

Re: [PATCH 0/4] ide: generic packet command representation

[Borislav Petkov]

On Tue, Feb 12, 2008 at 01:09:24AM +0100, Bartlomiej Zolnierkiewicz wrote:
> 
> On Monday 11 February 2008, Borislav Petkov wrote:
> > Hi Bart,
> > 
> > here's the ide_atapi_pc unification series. It all went pretty smoothly along
> > the search & replace line. Using driver-specific members in ide_atapi_pc like
> > idefloppy_callback and idetape_callback is kinda dumb but this approach seemed
> > the fastest versus unnecessary callback function signature change that will
> > touch stuff all over the place. Besides, ide-tape might be gone soon so that
> > would alleviate the problem.
> 
> applied all four patches, thanks!
> 
> > On a different note, i noticed ide-scsi might also need a cleanup similar to the
> > other drivers. It is next on my TODO list in case you don't have anything with a
> > higher prio.
> 
> I was actually hoping that you'll continue unifying ATAPI handling...

yeah, sure. ide-scsi simply will wander down the prio stack pushed by the other
stuff :)

> [ ide-scsi is orphaned and has (probably) unfixable problems (because of having

does this mean it might have a similar to idetape's destiny...?

-- 
Regards/Gruß,
    Boris.

[PATCH] ide-scsi: do non-atomic pc->flags testing

[Borislav Petkov]

commit 272976f0f5754707f9e41da315717a6eb8d9d536
Author: Borislav Petkov <petkovbb@gmail.com>
Date:   Tue Feb 12 16:22:44 2008 +0100

    ide-scsi: do non-atomic pc->flags testing

    Signed-off-by: Borislav Petkov <petkovbb@gmail.com>

diff --git a/drivers/scsi/ide-scsi.c b/drivers/scsi/ide-scsi.c
index 5ec421c..eb84cdc 100644
--- a/drivers/scsi/ide-scsi.c
+++ b/drivers/scsi/ide-scsi.c
@@ -319,8 +319,10 @@ static int idescsi_end_request (ide_drive_t *drive, int uptodate, int nrsecs)
 		pc = opc;
 		rq = pc->rq;
 		pc->scsi_cmd->result = (CHECK_CONDITION << 1) |
-					((test_bit(PC_TIMEDOUT, &pc->flags)?DID_TIME_OUT:DID_OK) << 16);
-	} else if (test_bit(PC_TIMEDOUT, &pc->flags)) {
+					(((pc->flags & PC_TIMEDOUT) ?
+							  DID_TIME_OUT :
+							  DID_OK) << 16);
+	} else if (pc->flags & PC_TIMEDOUT) {
 		if (log)
 			printk (KERN_WARNING "ide-scsi: %s: timed out for %lu\n",
 					drive->name, pc->scsi_cmd->serial_number);
@@ -362,7 +364,7 @@ static int idescsi_expiry(ide_drive_t *drive)
 #if IDESCSI_DEBUG_LOG
 	printk(KERN_WARNING "idescsi_expiry called for %lu at %lu\n", pc->scsi_cmd->serial_number, jiffies);
 #endif
-	set_bit(PC_TIMEDOUT, &pc->flags);
+	pc->flags |= PC_TIMEDOUT;
 
 	return 0;					/* we do not want the ide subsystem to retry */
 }
@@ -384,7 +386,7 @@ static ide_startstop_t idescsi_pc_intr (ide_drive_t *drive)
 	printk (KERN_INFO "ide-scsi: Reached idescsi_pc_intr interrupt handler\n");
 #endif /* IDESCSI_DEBUG_LOG */
 
-	if (test_bit(PC_TIMEDOUT, &pc->flags)){
+	if (pc->flags & PC_TIMEDOUT) {
 #if IDESCSI_DEBUG_LOG
 		printk(KERN_WARNING "idescsi_pc_intr: got timed out packet  %lu at %lu\n",
 				pc->scsi_cmd->serial_number, jiffies);
@@ -393,7 +395,8 @@ static ide_startstop_t idescsi_pc_intr (ide_drive_t *drive)
 		idescsi_end_request (drive, 1, 0);
 		return ide_stopped;
 	}
-	if (test_and_clear_bit (PC_DMA_IN_PROGRESS, &pc->flags)) {
+	if (pc->flags & PC_DMA_IN_PROGRESS) {
+		pc->flags &= ~PC_DMA_IN_PROGRESS;
 #if IDESCSI_DEBUG_LOG
 		printk ("ide-scsi: %s: DMA complete\n", drive->name);
 #endif /* IDESCSI_DEBUG_LOG */
@@ -432,7 +435,7 @@ static ide_startstop_t idescsi_pc_intr (ide_drive_t *drive)
 					"- discarding data\n");
 				temp = pc->buf_size - pc->xferred;
 				if (temp) {
-					clear_bit(PC_WRITING, &pc->flags);
+					pc->flags &= ~PC_WRITING;
 					if (pc->sg)
 						idescsi_input_buffers(drive, pc,
 									temp);
@@ -454,14 +457,14 @@ static ide_startstop_t idescsi_pc_intr (ide_drive_t *drive)
 		}
 	}
 	if (ireason & IO) {
-		clear_bit(PC_WRITING, &pc->flags);
+		pc->flags &= ~PC_WRITING;
 		if (pc->sg)
 			idescsi_input_buffers(drive, pc, bcount);
 		else
 			hwif->atapi_input_bytes(drive, pc->cur_pos,
 						bcount);
 	} else {
-		set_bit(PC_WRITING, &pc->flags);
+		pc->flags |= PC_WRITING;
 		if (pc->sg)
 			idescsi_output_buffers(drive, pc, bcount);
 		else
@@ -501,8 +504,8 @@ static ide_startstop_t idescsi_transfer_pc(ide_drive_t *drive)
 	ide_set_handler(drive, &idescsi_pc_intr, get_timeout(pc), idescsi_expiry);
 	/* Send the actual packet */
 	drive->hwif->atapi_output_bytes(drive, scsi->pc->c, 12);
-	if (test_bit (PC_DMA_OK, &pc->flags)) {
-		set_bit (PC_DMA_IN_PROGRESS, &pc->flags);
+	if (pc->flags & PC_DMA_OK) {
+		pc->flags |= PC_DMA_IN_PROGRESS;
 		hwif->dma_start(drive);
 	}
 	return ide_started;
@@ -512,10 +515,10 @@ static inline int idescsi_set_direction(struct ide_atapi_pc *pc)
 {
 	switch (pc->c[0]) {
 		case READ_6: case READ_10: case READ_12:
-			clear_bit(PC_WRITING, &pc->flags);
+			pc->flags &= ~PC_WRITING;
 			return 0;
 		case WRITE_6: case WRITE_10: case WRITE_12:
-			set_bit(PC_WRITING, &pc->flags);
+			pc->flags |= PC_WRITING;
 			return 0;
 		default:
 			return 1;
@@ -572,7 +575,7 @@ static ide_startstop_t idescsi_issue_pc(ide_drive_t *drive,
 	ide_pktcmd_tf_load(drive, IDE_TFLAG_NO_SELECT_MASK, bcount, dma);
 
 	if (dma)
-		set_bit(PC_DMA_OK, &pc->flags);
+		pc->flags |= PC_DMA_OK;
 
 	if (test_bit(IDESCSI_DRQ_INTERRUPT, &scsi->flags)) {
 		ide_execute_command(drive, WIN_PACKETCMD, &idescsi_transfer_pc,
-- 
Regards/Gruß,
    Boris.

Re: [PATCH] ide-scsi: do non-atomic pc->flags testing

[Bartlomiej Zolnierkiewicz]

On Tuesday 12 February 2008, Borislav Petkov wrote:
> commit 272976f0f5754707f9e41da315717a6eb8d9d536
> Author: Borislav Petkov <petkovbb@gmail.com>
> Date:   Tue Feb 12 16:22:44 2008 +0100
> 
>     ide-scsi: do non-atomic pc->flags testing
> 
>     Signed-off-by: Borislav Petkov <petkovbb@gmail.com>
> 
> diff --git a/drivers/scsi/ide-scsi.c b/drivers/scsi/ide-scsi.c
> index 5ec421c..eb84cdc 100644
> --- a/drivers/scsi/ide-scsi.c
> +++ b/drivers/scsi/ide-scsi.c
> @@ -319,8 +319,10 @@ static int idescsi_end_request (ide_drive_t *drive, int uptodate, int nrsecs)
>  		pc = opc;
>  		rq = pc->rq;
>  		pc->scsi_cmd->result = (CHECK_CONDITION << 1) |
> -					((test_bit(PC_TIMEDOUT, &pc->flags)?DID_TIME_OUT:DID_OK) << 16);
> -	} else if (test_bit(PC_TIMEDOUT, &pc->flags)) {
> +					(((pc->flags & PC_TIMEDOUT) ?
> +							  DID_TIME_OUT :
> +							  DID_OK) << 16);
> +	} else if (pc->flags & PC_TIMEDOUT) {

How's about renaming flag defines to PC_FLAG_* at the same time
(like it was done for other ATAPI drivers)?

Otherwise looks good.

Re: [PATCH 0/4] ide: generic packet command representation

[Jan Engelhardt]

On Feb 12 2008 01:09, Bartlomiej Zolnierkiewicz wrote:
>
>> On a different note, i noticed ide-scsi might also need a cleanup
>> similar to the other drivers. It is next on my TODO list in case
>> you don't have anything with a higher prio.
>
>I was actually hoping that you'll continue unifying ATAPI handling...
>
>[ ide-scsi is orphaned and has (probably) unfixable problems
>  (because of having dependencies on both IDE and SCSI subsystems)
>  so it is not worth IMO but I will of course accept patches... ]

So, why is ide-scsi still in the tree? Is there some use case besides
cdrecord? (Which can use /dev/hda already without the ide-scsi blob...)

Re: [PATCH 0/4] ide: generic packet command representation

[Alan Cox]

> So, why is ide-scsi still in the tree? Is there some use case besides
> cdrecord? (Which can use /dev/hda already without the ide-scsi blob...)

With old IDE only ide-scsi can handle some of the more obscurely weird
devices, and some tape drives fail with ide-tape but work with  ide-scsi
+ osst/st.

Alan