IDETAPE_FLAG_MEDIUM_PRESENT = (1 << 6),
};
-/* A pipeline stage. */
-typedef struct idetape_stage_s {
- struct request rq; /* The corresponding request */
- struct idetape_bh *bh; /* The data buffers */
- struct idetape_stage_s *next; /* Pointer to the next stage */
-} idetape_stage_t;
-
/*
* Most of our global data which we need to save even as we leave the driver due
* to an interrupt or a timer event is stored in the struct defined below.
/* Data buffer size chosen based on the tape's recommendation */
int buffer_size;
- idetape_stage_t *merge_stage;
- int merge_stage_size;
+ /* merge buffer */
+ struct idetape_bh *merge_bh;
+ /* size of the merge buffer */
+ int merge_bh_size;
+ /* pointer to current buffer head within the merge buffer */
struct idetape_bh *bh;
char *b_data;
int b_count;
if (bh == NULL) {
printk(KERN_ERR "ide-tape: bh == NULL in "
"idetape_input_buffers\n");
- ide_atapi_discard_data(drive, bcount);
+ ide_pad_transfer(drive, 0, bcount);
return;
}
count = min(
(unsigned int)(bh->b_size - atomic_read(&bh->b_count)),
bcount);
- HWIF(drive)->atapi_input_bytes(drive, bh->b_data +
+ drive->hwif->input_data(drive, NULL, bh->b_data +
atomic_read(&bh->b_count), count);
bcount -= count;
atomic_add(count, &bh->b_count);
return;
}
count = min((unsigned int)pc->b_count, (unsigned int)bcount);
- HWIF(drive)->atapi_output_bytes(drive, pc->b_data, count);
+ drive->hwif->output_data(drive, NULL, pc->b_data, count);
bcount -= count;
pc->b_data += count;
pc->b_count -= count;
}
/* Free data buffers completely. */
-static void ide_tape_kfree_buffer(idetape_stage_t *stage)
+static void ide_tape_kfree_buffer(idetape_tape_t *tape)
{
- struct idetape_bh *prev_bh, *bh = stage->bh;
+ struct idetape_bh *prev_bh, *bh = tape->merge_bh;
while (bh) {
u32 size = bh->b_size;
bh = bh->b_reqnext;
kfree(prev_bh);
}
- kfree(stage);
+ kfree(tape->merge_bh);
}
static int idetape_end_request(ide_drive_t *drive, int uptodate, int nr_sects)
static void idetape_init_rq(struct request *rq, u8 cmd)
{
- memset(rq, 0, sizeof(*rq));
+ blk_rq_init(NULL, rq);
rq->cmd_type = REQ_TYPE_SPECIAL;
rq->cmd[0] = cmd;
}
printk(KERN_ERR "ide-tape: The tape wants to "
"send us more data than expected "
"- discarding data\n");
- ide_atapi_discard_data(drive, bcount);
+ ide_pad_transfer(drive, 0, bcount);
ide_set_handler(drive, &idetape_pc_intr,
IDETAPE_WAIT_CMD, NULL);
return ide_started;
"data than expected - allowing transfer\n");
}
iobuf = &idetape_input_buffers;
- xferfunc = hwif->atapi_input_bytes;
+ xferfunc = hwif->input_data;
} else {
iobuf = &idetape_output_buffers;
- xferfunc = hwif->atapi_output_bytes;
+ xferfunc = hwif->output_data;
}
if (pc->bh)
iobuf(drive, pc, bcount);
else
- xferfunc(drive, pc->cur_pos, bcount);
+ xferfunc(drive, NULL, pc->cur_pos, bcount);
/* Update the current position */
pc->xferred += bcount;
hwif->dma_ops->dma_start(drive);
#endif
/* Send the actual packet */
- HWIF(drive)->atapi_output_bytes(drive, pc->c, 12);
+ hwif->output_data(drive, NULL, pc->c, 12);
+
return ide_started;
}
IDETAPE_WAIT_CMD, NULL);
return ide_started;
} else {
- hwif->OUTB(WIN_PACKETCMD, hwif->io_ports.command_addr);
+ ide_execute_pkt_cmd(drive);
return idetape_transfer_pc(drive);
}
}
* It returns a pointer to the newly allocated buffer, or NULL in case of
* failure.
*/
-static idetape_stage_t *ide_tape_kmalloc_buffer(idetape_tape_t *tape, int full,
- int clear)
+static struct idetape_bh *ide_tape_kmalloc_buffer(idetape_tape_t *tape,
+ int full, int clear)
{
- idetape_stage_t *stage;
- struct idetape_bh *prev_bh, *bh;
+ struct idetape_bh *prev_bh, *bh, *merge_bh;
int pages = tape->pages_per_buffer;
unsigned int order, b_allocd;
char *b_data = NULL;
- stage = kmalloc(sizeof(idetape_stage_t), GFP_KERNEL);
- if (!stage)
- return NULL;
- stage->next = NULL;
-
- stage->bh = kmalloc(sizeof(struct idetape_bh), GFP_KERNEL);
- bh = stage->bh;
+ merge_bh = kmalloc(sizeof(struct idetape_bh), GFP_KERNEL);
+ bh = merge_bh;
if (bh == NULL)
goto abort;
bh->b_size -= tape->excess_bh_size;
if (full)
atomic_sub(tape->excess_bh_size, &bh->b_count);
- return stage;
+ return merge_bh;
abort:
- ide_tape_kfree_buffer(stage);
+ ide_tape_kfree_buffer(tape);
return NULL;
}
return ret;
}
-static void idetape_init_merge_stage(idetape_tape_t *tape)
+static void idetape_init_merge_buffer(idetape_tape_t *tape)
{
- struct idetape_bh *bh = tape->merge_stage->bh;
+ struct idetape_bh *bh = tape->merge_bh;
+ tape->bh = tape->merge_bh;
- tape->bh = bh;
if (tape->chrdev_dir == IDETAPE_DIR_WRITE)
atomic_set(&bh->b_count, 0);
else {
return;
clear_bit(IDETAPE_FLAG_FILEMARK, &tape->flags);
- tape->merge_stage_size = 0;
- if (tape->merge_stage != NULL) {
- ide_tape_kfree_buffer(tape->merge_stage);
- tape->merge_stage = NULL;
+ tape->merge_bh_size = 0;
+ if (tape->merge_bh != NULL) {
+ ide_tape_kfree_buffer(tape);
+ tape->merge_bh = NULL;
}
tape->chrdev_dir = IDETAPE_DIR_NONE;
if ((cmd & (REQ_IDETAPE_READ | REQ_IDETAPE_WRITE)) == 0)
return 0;
- if (tape->merge_stage)
- idetape_init_merge_stage(tape);
+ if (tape->merge_bh)
+ idetape_init_merge_buffer(tape);
if (rq.errors == IDETAPE_ERROR_GENERAL)
return -EIO;
return (tape->blk_size * (blocks-rq.current_nr_sectors));
debug_log(DBG_CHRDEV, "Enter %s\n", __func__);
return idetape_queue_rw_tail(drive, REQ_IDETAPE_WRITE,
- blocks, tape->merge_stage->bh);
+ blocks, tape->merge_bh);
}
-static void idetape_empty_write_pipeline(ide_drive_t *drive)
+static void ide_tape_flush_merge_buffer(ide_drive_t *drive)
{
idetape_tape_t *tape = drive->driver_data;
int blocks, min;
struct idetape_bh *bh;
if (tape->chrdev_dir != IDETAPE_DIR_WRITE) {
- printk(KERN_ERR "ide-tape: bug: Trying to empty write pipeline,"
+ printk(KERN_ERR "ide-tape: bug: Trying to empty merge buffer"
" but we are not writing.\n");
return;
}
- if (tape->merge_stage_size > tape->buffer_size) {
+ if (tape->merge_bh_size > tape->buffer_size) {
printk(KERN_ERR "ide-tape: bug: merge_buffer too big\n");
- tape->merge_stage_size = tape->buffer_size;
+ tape->merge_bh_size = tape->buffer_size;
}
- if (tape->merge_stage_size) {
- blocks = tape->merge_stage_size / tape->blk_size;
- if (tape->merge_stage_size % tape->blk_size) {
+ if (tape->merge_bh_size) {
+ blocks = tape->merge_bh_size / tape->blk_size;
+ if (tape->merge_bh_size % tape->blk_size) {
unsigned int i;
blocks++;
- i = tape->blk_size - tape->merge_stage_size %
+ i = tape->blk_size - tape->merge_bh_size %
tape->blk_size;
bh = tape->bh->b_reqnext;
while (bh) {
}
}
(void) idetape_add_chrdev_write_request(drive, blocks);
- tape->merge_stage_size = 0;
+ tape->merge_bh_size = 0;
}
- if (tape->merge_stage != NULL) {
- ide_tape_kfree_buffer(tape->merge_stage);
- tape->merge_stage = NULL;
+ if (tape->merge_bh != NULL) {
+ ide_tape_kfree_buffer(tape);
+ tape->merge_bh = NULL;
}
tape->chrdev_dir = IDETAPE_DIR_NONE;
}
/* Initialize read operation */
if (tape->chrdev_dir != IDETAPE_DIR_READ) {
if (tape->chrdev_dir == IDETAPE_DIR_WRITE) {
- idetape_empty_write_pipeline(drive);
+ ide_tape_flush_merge_buffer(drive);
idetape_flush_tape_buffers(drive);
}
- if (tape->merge_stage || tape->merge_stage_size) {
- printk(KERN_ERR "ide-tape: merge_stage_size should be"
+ if (tape->merge_bh || tape->merge_bh_size) {
+ printk(KERN_ERR "ide-tape: merge_bh_size should be"
" 0 now\n");
- tape->merge_stage_size = 0;
+ tape->merge_bh_size = 0;
}
- tape->merge_stage = ide_tape_kmalloc_buffer(tape, 0, 0);
- if (!tape->merge_stage)
+ tape->merge_bh = ide_tape_kmalloc_buffer(tape, 0, 0);
+ if (!tape->merge_bh)
return -ENOMEM;
tape->chrdev_dir = IDETAPE_DIR_READ;
if (drive->dsc_overlap) {
bytes_read = idetape_queue_rw_tail(drive,
REQ_IDETAPE_READ, 0,
- tape->merge_stage->bh);
+ tape->merge_bh);
if (bytes_read < 0) {
- ide_tape_kfree_buffer(tape->merge_stage);
- tape->merge_stage = NULL;
+ ide_tape_kfree_buffer(tape);
+ tape->merge_bh = NULL;
tape->chrdev_dir = IDETAPE_DIR_NONE;
return bytes_read;
}
idetape_init_read(drive);
return idetape_queue_rw_tail(drive, REQ_IDETAPE_READ, blocks,
- tape->merge_stage->bh);
+ tape->merge_bh);
}
static void idetape_pad_zeros(ide_drive_t *drive, int bcount)
while (bcount) {
unsigned int count;
- bh = tape->merge_stage->bh;
+ bh = tape->merge_bh;
count = min(tape->buffer_size, bcount);
bcount -= count;
blocks = count / tape->blk_size;
bh = bh->b_reqnext;
}
idetape_queue_rw_tail(drive, REQ_IDETAPE_WRITE, blocks,
- tape->merge_stage->bh);
+ tape->merge_bh);
}
}
}
if (tape->chrdev_dir == IDETAPE_DIR_READ) {
- tape->merge_stage_size = 0;
+ tape->merge_bh_size = 0;
if (test_and_clear_bit(IDETAPE_FLAG_FILEMARK, &tape->flags))
++count;
ide_tape_discard_merge_buffer(drive, 0);
}
- /*
- * The filemark was not found in our internal pipeline; now we can issue
- * the space command.
- */
switch (mt_op) {
case MTFSF:
case MTBSF:
return rc;
if (count == 0)
return (0);
- if (tape->merge_stage_size) {
- actually_read = min((unsigned int)(tape->merge_stage_size),
+ if (tape->merge_bh_size) {
+ actually_read = min((unsigned int)(tape->merge_bh_size),
(unsigned int)count);
if (idetape_copy_stage_to_user(tape, buf, actually_read))
ret = -EFAULT;
buf += actually_read;
- tape->merge_stage_size -= actually_read;
+ tape->merge_bh_size -= actually_read;
count -= actually_read;
}
while (count >= tape->buffer_size) {
if (idetape_copy_stage_to_user(tape, buf, temp))
ret = -EFAULT;
actually_read += temp;
- tape->merge_stage_size = bytes_read-temp;
+ tape->merge_bh_size = bytes_read-temp;
}
finish:
if (!actually_read && test_bit(IDETAPE_FLAG_FILEMARK, &tape->flags)) {
if (tape->chrdev_dir != IDETAPE_DIR_WRITE) {
if (tape->chrdev_dir == IDETAPE_DIR_READ)
ide_tape_discard_merge_buffer(drive, 1);
- if (tape->merge_stage || tape->merge_stage_size) {
- printk(KERN_ERR "ide-tape: merge_stage_size "
+ if (tape->merge_bh || tape->merge_bh_size) {
+ printk(KERN_ERR "ide-tape: merge_bh_size "
"should be 0 now\n");
- tape->merge_stage_size = 0;
+ tape->merge_bh_size = 0;
}
- tape->merge_stage = ide_tape_kmalloc_buffer(tape, 0, 0);
- if (!tape->merge_stage)
+ tape->merge_bh = ide_tape_kmalloc_buffer(tape, 0, 0);
+ if (!tape->merge_bh)
return -ENOMEM;
tape->chrdev_dir = IDETAPE_DIR_WRITE;
- idetape_init_merge_stage(tape);
+ idetape_init_merge_buffer(tape);
/*
* Issue a write 0 command to ensure that DSC handshake is
if (drive->dsc_overlap) {
ssize_t retval = idetape_queue_rw_tail(drive,
REQ_IDETAPE_WRITE, 0,
- tape->merge_stage->bh);
+ tape->merge_bh);
if (retval < 0) {
- ide_tape_kfree_buffer(tape->merge_stage);
- tape->merge_stage = NULL;
+ ide_tape_kfree_buffer(tape);
+ tape->merge_bh = NULL;
tape->chrdev_dir = IDETAPE_DIR_NONE;
return retval;
}
}
if (count == 0)
return (0);
- if (tape->merge_stage_size) {
- if (tape->merge_stage_size >= tape->buffer_size) {
+ if (tape->merge_bh_size) {
+ if (tape->merge_bh_size >= tape->buffer_size) {
printk(KERN_ERR "ide-tape: bug: merge buf too big\n");
- tape->merge_stage_size = 0;
+ tape->merge_bh_size = 0;
}
actually_written = min((unsigned int)
- (tape->buffer_size - tape->merge_stage_size),
+ (tape->buffer_size - tape->merge_bh_size),
(unsigned int)count);
if (idetape_copy_stage_from_user(tape, buf, actually_written))
ret = -EFAULT;
buf += actually_written;
- tape->merge_stage_size += actually_written;
+ tape->merge_bh_size += actually_written;
count -= actually_written;
- if (tape->merge_stage_size == tape->buffer_size) {
+ if (tape->merge_bh_size == tape->buffer_size) {
ssize_t retval;
- tape->merge_stage_size = 0;
+ tape->merge_bh_size = 0;
retval = idetape_add_chrdev_write_request(drive, ctl);
if (retval <= 0)
return (retval);
actually_written += count;
if (idetape_copy_stage_from_user(tape, buf, count))
ret = -EFAULT;
- tape->merge_stage_size += count;
+ tape->merge_bh_size += count;
}
return ret ? ret : actually_written;
}
debug_log(DBG_CHRDEV, "Enter %s, cmd=%u\n", __func__, cmd);
if (tape->chrdev_dir == IDETAPE_DIR_WRITE) {
- idetape_empty_write_pipeline(drive);
+ ide_tape_flush_merge_buffer(drive);
idetape_flush_tape_buffers(drive);
}
if (cmd == MTIOCGET || cmd == MTIOCPOS) {
- block_offset = tape->merge_stage_size /
+ block_offset = tape->merge_bh_size /
(tape->blk_size * tape->user_bs_factor);
position = idetape_read_position(drive);
if (position < 0)
{
idetape_tape_t *tape = drive->driver_data;
- idetape_empty_write_pipeline(drive);
- tape->merge_stage = ide_tape_kmalloc_buffer(tape, 1, 0);
- if (tape->merge_stage != NULL) {
+ ide_tape_flush_merge_buffer(drive);
+ tape->merge_bh = ide_tape_kmalloc_buffer(tape, 1, 0);
+ if (tape->merge_bh != NULL) {
idetape_pad_zeros(drive, tape->blk_size *
(tape->user_bs_factor - 1));
- ide_tape_kfree_buffer(tape->merge_stage);
- tape->merge_stage = NULL;
+ ide_tape_kfree_buffer(tape);
+ tape->merge_bh = NULL;
}
idetape_write_filemark(drive);
idetape_flush_tape_buffers(drive);
ide_drive_t *drive = tape->drive;
struct gendisk *g = tape->disk;
- BUG_ON(tape->merge_stage_size);
+ BUG_ON(tape->merge_bh_size);
drive->dsc_overlap = 0;
drive->driver_data = NULL;
projects / linux-2.6 / blobdiff