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ide-tape: mv tape->stage_size tape->buffer_size 

Signed-off-by: Borislav Petkov <petkovbb@gmail.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
This commit is contained in:
Borislav Petkov 2008-04-27 15:38:33 +02:00 committed by Bartlomiej Zolnierkiewicz
parent 41aa17069e
commit f73850a302
1 changed files with 29 additions and 29 deletions
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58
drivers/ide/ide-tape.c
View File

@ -308,7 +308,7 @@ typedef struct ide_tape_obj {
*/
/* Data buffer size chosen based on the tape's recommendation */
int stage_size;
int buffer_size;
idetape_stage_t *merge_stage;
int merge_stage_size;
struct idetape_bh *bh;
@ -1168,7 +1168,7 @@ static void idetape_create_read_cmd(idetape_tape_t *tape,
pc->buf = NULL;
pc->buf_size = length * tape->blk_size;
pc->req_xfer = pc->buf_size;
if (pc->req_xfer == tape->stage_size)
if (pc->req_xfer == tape->buffer_size)
pc->flags |= PC_FLAG_DMA_RECOMMENDED;
}
@ -1188,7 +1188,7 @@ static void idetape_create_write_cmd(idetape_tape_t *tape,
pc->buf = NULL;
pc->buf_size = length * tape->blk_size;
pc->req_xfer = pc->buf_size;
if (pc->req_xfer == tape->stage_size)
if (pc->req_xfer == tape->buffer_size)
pc->flags |= PC_FLAG_DMA_RECOMMENDED;
}
@ -1291,7 +1291,7 @@ out:
/*
* The function below uses __get_free_pages to allocate a data buffer of size
* tape->stage_size (or a bit more). We attempt to combine sequential pages as
* tape->buffer_size (or a bit more). We attempt to combine sequential pages as
* much as possible.
*
* It returns a pointer to the newly allocated buffer, or NULL in case of
@ -1792,9 +1792,9 @@ static void idetape_empty_write_pipeline(ide_drive_t *drive)
" but we are not writing.\n");
return;
}
if (tape->merge_stage_size > tape->stage_size) {
if (tape->merge_stage_size > tape->buffer_size) {
printk(KERN_ERR "ide-tape: bug: merge_buffer too big\n");
tape->merge_stage_size = tape->stage_size;
tape->merge_stage_size = tape->buffer_size;
}
if (tape->merge_stage_size) {
blocks = tape->merge_stage_size / tape->blk_size;
@ -1905,7 +1905,7 @@ static void idetape_pad_zeros(ide_drive_t *drive, int bcount)
unsigned int count;
bh = tape->merge_stage->bh;
count = min(tape->stage_size, bcount);
count = min(tape->buffer_size, bcount);
bcount -= count;
blocks = count / tape->blk_size;
while (count) {
@ -2074,7 +2074,7 @@ static ssize_t idetape_chrdev_read(struct file *file, char __user *buf,
tape->merge_stage_size -= actually_read;
count -= actually_read;
}
while (count >= tape->stage_size) {
while (count >= tape->buffer_size) {
bytes_read = idetape_add_chrdev_read_request(drive, ctl);
if (bytes_read <= 0)
goto finish;
@ -2156,12 +2156,12 @@ static ssize_t idetape_chrdev_write(struct file *file, const char __user *buf,
if (count == 0)
return (0);
if (tape->merge_stage_size) {
if (tape->merge_stage_size >= tape->stage_size) {
if (tape->merge_stage_size >= tape->buffer_size) {
printk(KERN_ERR "ide-tape: bug: merge buf too big\n");
tape->merge_stage_size = 0;
}
actually_written = min((unsigned int)
(tape->stage_size - tape->merge_stage_size),
(tape->buffer_size - tape->merge_stage_size),
(unsigned int)count);
if (idetape_copy_stage_from_user(tape, buf, actually_written))
ret = -EFAULT;
@ -2169,7 +2169,7 @@ static ssize_t idetape_chrdev_write(struct file *file, const char __user *buf,
tape->merge_stage_size += actually_written;
count -= actually_written;
if (tape->merge_stage_size == tape->stage_size) {
if (tape->merge_stage_size == tape->buffer_size) {
ssize_t retval;
tape->merge_stage_size = 0;
retval = idetape_add_chrdev_write_request(drive, ctl);
@ -2177,14 +2177,14 @@ static ssize_t idetape_chrdev_write(struct file *file, const char __user *buf,
return (retval);
}
}
while (count >= tape->stage_size) {
while (count >= tape->buffer_size) {
ssize_t retval;
if (idetape_copy_stage_from_user(tape, buf, tape->stage_size))
if (idetape_copy_stage_from_user(tape, buf, tape->buffer_size))
ret = -EFAULT;
buf += tape->stage_size;
count -= tape->stage_size;
buf += tape->buffer_size;
count -= tape->buffer_size;
retval = idetape_add_chrdev_write_request(drive, ctl);
actually_written += tape->stage_size;
actually_written += tape->buffer_size;
if (retval <= 0)
return (retval);
}
@ -2678,8 +2678,8 @@ static void idetape_add_settings(ide_drive_t *drive)
1, 2, (u16 *)&tape->caps[16], NULL);
ide_add_setting(drive, "speed", SETTING_READ, TYPE_SHORT, 0, 0xffff,
1, 1, (u16 *)&tape->caps[14], NULL);
ide_add_setting(drive, "stage", SETTING_READ, TYPE_INT, 0, 0xffff, 1,
1024, &tape->stage_size, NULL);
ide_add_setting(drive, "buffer_size", SETTING_READ, TYPE_INT, 0, 0xffff,
1, 1024, &tape->buffer_size, NULL);
ide_add_setting(drive, "tdsc", SETTING_RW, TYPE_INT, IDETAPE_DSC_RW_MIN,
IDETAPE_DSC_RW_MAX, 1000, HZ, &tape->best_dsc_rw_freq,
NULL);
@ -2709,7 +2709,7 @@ static void idetape_setup(ide_drive_t *drive, idetape_tape_t *tape, int minor)
{
unsigned long t;
int speed;
int stage_size;
int buffer_size;
u8 gcw[2];
u16 *ctl = (u16 *)&tape->caps[12];
@ -2739,23 +2739,23 @@ static void idetape_setup(ide_drive_t *drive, idetape_tape_t *tape, int minor)
idetape_get_mode_sense_results(drive);
ide_tape_get_bsize_from_bdesc(drive);
tape->user_bs_factor = 1;
tape->stage_size = *ctl * tape->blk_size;
while (tape->stage_size > 0xffff) {
tape->buffer_size = *ctl * tape->blk_size;
while (tape->buffer_size > 0xffff) {
printk(KERN_NOTICE "ide-tape: decreasing stage size\n");
*ctl /= 2;
tape->stage_size = *ctl * tape->blk_size;
tape->buffer_size = *ctl * tape->blk_size;
}
stage_size = tape->stage_size;
tape->pages_per_stage = stage_size / PAGE_SIZE;
if (stage_size % PAGE_SIZE) {
buffer_size = tape->buffer_size;
tape->pages_per_stage = buffer_size / PAGE_SIZE;
if (buffer_size % PAGE_SIZE) {
tape->pages_per_stage++;
tape->excess_bh_size = PAGE_SIZE - stage_size % PAGE_SIZE;
tape->excess_bh_size = PAGE_SIZE - buffer_size % PAGE_SIZE;
}
/* select the "best" DSC read/write polling freq */
speed = max(*(u16 *)&tape->caps[14], *(u16 *)&tape->caps[8]);
t = (IDETAPE_FIFO_THRESHOLD * tape->stage_size * HZ) / (speed * 1000);
t = (IDETAPE_FIFO_THRESHOLD * tape->buffer_size * HZ) / (speed * 1000);
/*
* Ensure that the number we got makes sense; limit it within
@ -2767,8 +2767,8 @@ static void idetape_setup(ide_drive_t *drive, idetape_tape_t *tape, int minor)
printk(KERN_INFO "ide-tape: %s <-> %s: %dKBps, %d*%dkB buffer, "
"%lums tDSC%s\n",
drive->name, tape->name, *(u16 *)&tape->caps[14],
(*(u16 *)&tape->caps[16] * 512) / tape->stage_size,
tape->stage_size / 1024,
(*(u16 *)&tape->caps[16] * 512) / tape->buffer_size,
tape->buffer_size / 1024,
tape->best_dsc_rw_freq * 1000 / HZ,
drive->using_dma ? ", DMA":"");