#define IDETAPE_VERSION "1.19"
-#include <linux/config.h>
#include <linux/module.h>
#include <linux/types.h>
#include <linux/string.h>
#include <linux/timer.h>
#include <linux/mm.h>
#include <linux/interrupt.h>
+#include <linux/jiffies.h>
#include <linux/major.h>
-#include <linux/devfs_fs_kernel.h>
#include <linux/errno.h>
#include <linux/genhd.h>
#include <linux/slab.h>
#include <linux/smp_lock.h>
#include <linux/completion.h>
#include <linux/bitops.h>
+#include <linux/mutex.h>
#include <asm/byteorder.h>
#include <asm/irq.h>
* The following parameter is used to select the point in the internal
* tape fifo in which we will start to refill the buffer. Decreasing
* the following parameter will improve the system's latency and
- * interactive response, while using a high value might improve sytem
+ * interactive response, while using a high value might improve system
* throughput.
*/
#define IDETAPE_FIFO_THRESHOLD 2
/*************************** End of tunable parameters ***********************/
/*
- * Debugging/Performance analysis
- *
- * I/O trace support
- */
-#define USE_IOTRACE 0
-#if USE_IOTRACE
-#include <linux/io_trace.h>
-#define IO_IDETAPE_FIFO 500
-#endif
-
-/*
* Read/Write error simulation
*/
#define SIMULATE_ERRORS 0
} idetape_chrdev_direction_t;
struct idetape_bh {
- unsigned short b_size;
+ u32 b_size;
atomic_t b_count;
struct idetape_bh *b_reqnext;
char *b_data;
int debug_level;
} idetape_tape_t;
-static DECLARE_MUTEX(idetape_ref_sem);
+static DEFINE_MUTEX(idetape_ref_mutex);
static struct class *idetape_sysfs_class;
{
struct ide_tape_obj *tape = NULL;
- down(&idetape_ref_sem);
+ mutex_lock(&idetape_ref_mutex);
tape = ide_tape_g(disk);
if (tape)
kref_get(&tape->kref);
- up(&idetape_ref_sem);
+ mutex_unlock(&idetape_ref_mutex);
return tape;
}
static void ide_tape_put(struct ide_tape_obj *tape)
{
- down(&idetape_ref_sem);
+ mutex_lock(&idetape_ref_mutex);
kref_put(&tape->kref, ide_tape_release);
- up(&idetape_ref_sem);
+ mutex_unlock(&idetape_ref_mutex);
}
/*
{
struct ide_tape_obj *tape = NULL;
- down(&idetape_ref_sem);
+ mutex_lock(&idetape_ref_mutex);
tape = idetape_devs[i];
if (tape)
kref_get(&tape->kref);
- up(&idetape_ref_sem);
+ mutex_unlock(&idetape_ref_mutex);
return tape;
}
if (error)
tape->failed_pc = NULL;
+ if (!blk_special_request(rq)) {
+ ide_end_request(drive, uptodate, nr_sects);
+ return 0;
+ }
+
spin_lock_irqsave(&tape->spinlock, flags);
/* The request was a pipelined data transfer request */
static void idetape_init_rq(struct request *rq, u8 cmd)
{
memset(rq, 0, sizeof(*rq));
- rq->flags = REQ_SPECIAL;
+ rq->cmd_type = REQ_TYPE_SPECIAL;
rq->cmd[0] = cmd;
}
idetape_tape_t *tape = drive->driver_data;
idetape_pc_t *pc;
struct request *rq;
- atapi_error_t error;
- error.all = HWIF(drive)->INB(IDE_ERROR_REG);
+ (void)drive->hwif->INB(IDE_ERROR_REG);
pc = idetape_next_pc_storage(drive);
rq = idetape_next_rq_storage(drive);
idetape_create_request_sense_cmd(pc);
{
ide_hwif_t *hwif = drive->hwif;
idetape_tape_t *tape = drive->driver_data;
- atapi_status_t status;
- atapi_bcount_t bcount;
- atapi_ireason_t ireason;
idetape_pc_t *pc = tape->pc;
-
unsigned int temp;
#if SIMULATE_ERRORS
static int error_sim_count = 0;
#endif
+ u16 bcount;
+ u8 stat, ireason;
#if IDETAPE_DEBUG_LOG
if (tape->debug_level >= 4)
#endif /* IDETAPE_DEBUG_LOG */
/* Clear the interrupt */
- status.all = HWIF(drive)->INB(IDE_STATUS_REG);
+ stat = hwif->INB(IDE_STATUS_REG);
if (test_bit(PC_DMA_IN_PROGRESS, &pc->flags)) {
- if (HWIF(drive)->ide_dma_end(drive) || status.b.check) {
+ if (hwif->ide_dma_end(drive) || (stat & ERR_STAT)) {
/*
* A DMA error is sometimes expected. For example,
* if the tape is crossing a filemark during a
}
/* No more interrupts */
- if (!status.b.drq) {
+ if ((stat & DRQ_STAT) == 0) {
#if IDETAPE_DEBUG_LOG
if (tape->debug_level >= 2)
printk(KERN_INFO "ide-tape: Packet command completed, %d bytes transferred\n", pc->actually_transferred);
(++error_sim_count % 100) == 0) {
printk(KERN_INFO "ide-tape: %s: simulating error\n",
tape->name);
- status.b.check = 1;
+ stat |= ERR_STAT;
}
#endif
- if (status.b.check && pc->c[0] == IDETAPE_REQUEST_SENSE_CMD)
- status.b.check = 0;
- if (status.b.check || test_bit(PC_DMA_ERROR, &pc->flags)) { /* Error detected */
+ if ((stat & ERR_STAT) && pc->c[0] == IDETAPE_REQUEST_SENSE_CMD)
+ stat &= ~ERR_STAT;
+ if ((stat & ERR_STAT) || test_bit(PC_DMA_ERROR, &pc->flags)) {
+ /* Error detected */
#if IDETAPE_DEBUG_LOG
if (tape->debug_level >= 1)
printk(KERN_INFO "ide-tape: %s: I/O error\n",
}
pc->error = 0;
if (test_bit(PC_WAIT_FOR_DSC, &pc->flags) &&
- !status.b.dsc) {
+ (stat & SEEK_STAT) == 0) {
/* Media access command */
tape->dsc_polling_start = jiffies;
tape->dsc_polling_frequency = IDETAPE_DSC_MA_FAST;
printk(KERN_ERR "ide-tape: The tape wants to issue more "
"interrupts in DMA mode\n");
printk(KERN_ERR "ide-tape: DMA disabled, reverting to PIO\n");
- (void)__ide_dma_off(drive);
+ ide_dma_off(drive);
return ide_do_reset(drive);
}
/* Get the number of bytes to transfer on this interrupt. */
- bcount.b.high = hwif->INB(IDE_BCOUNTH_REG);
- bcount.b.low = hwif->INB(IDE_BCOUNTL_REG);
+ bcount = (hwif->INB(IDE_BCOUNTH_REG) << 8) |
+ hwif->INB(IDE_BCOUNTL_REG);
- ireason.all = hwif->INB(IDE_IREASON_REG);
+ ireason = hwif->INB(IDE_IREASON_REG);
- if (ireason.b.cod) {
+ if (ireason & CD) {
printk(KERN_ERR "ide-tape: CoD != 0 in idetape_pc_intr\n");
return ide_do_reset(drive);
}
- if (ireason.b.io == test_bit(PC_WRITING, &pc->flags)) {
+ if (((ireason & IO) == IO) == test_bit(PC_WRITING, &pc->flags)) {
/* Hopefully, we will never get here */
printk(KERN_ERR "ide-tape: We wanted to %s, ",
- ireason.b.io ? "Write":"Read");
+ (ireason & IO) ? "Write" : "Read");
printk(KERN_ERR "ide-tape: but the tape wants us to %s !\n",
- ireason.b.io ? "Read":"Write");
+ (ireason & IO) ? "Read" : "Write");
return ide_do_reset(drive);
}
if (!test_bit(PC_WRITING, &pc->flags)) {
/* Reading - Check that we have enough space */
- temp = pc->actually_transferred + bcount.all;
+ temp = pc->actually_transferred + bcount;
if (temp > pc->request_transfer) {
if (temp > pc->buffer_size) {
printk(KERN_ERR "ide-tape: The tape wants to send us more data than expected - discarding data\n");
- idetape_discard_data(drive, bcount.all);
+ idetape_discard_data(drive, bcount);
ide_set_handler(drive, &idetape_pc_intr, IDETAPE_WAIT_CMD, NULL);
return ide_started;
}
}
if (test_bit(PC_WRITING, &pc->flags)) {
if (pc->bh != NULL)
- idetape_output_buffers(drive, pc, bcount.all);
+ idetape_output_buffers(drive, pc, bcount);
else
/* Write the current buffer */
- HWIF(drive)->atapi_output_bytes(drive, pc->current_position, bcount.all);
+ hwif->atapi_output_bytes(drive, pc->current_position,
+ bcount);
} else {
if (pc->bh != NULL)
- idetape_input_buffers(drive, pc, bcount.all);
+ idetape_input_buffers(drive, pc, bcount);
else
/* Read the current buffer */
- HWIF(drive)->atapi_input_bytes(drive, pc->current_position, bcount.all);
+ hwif->atapi_input_bytes(drive, pc->current_position,
+ bcount);
}
/* Update the current position */
- pc->actually_transferred += bcount.all;
- pc->current_position += bcount.all;
+ pc->actually_transferred += bcount;
+ pc->current_position += bcount;
#if IDETAPE_DEBUG_LOG
if (tape->debug_level >= 2)
- printk(KERN_INFO "ide-tape: [cmd %x] transferred %d bytes on that interrupt\n", pc->c[0], bcount.all);
+ printk(KERN_INFO "ide-tape: [cmd %x] transferred %d bytes "
+ "on that interrupt\n", pc->c[0], bcount);
#endif
/* And set the interrupt handler again */
ide_set_handler(drive, &idetape_pc_intr, IDETAPE_WAIT_CMD, NULL);
ide_hwif_t *hwif = drive->hwif;
idetape_tape_t *tape = drive->driver_data;
idetape_pc_t *pc = tape->pc;
- atapi_ireason_t ireason;
int retries = 100;
ide_startstop_t startstop;
+ u8 ireason;
if (ide_wait_stat(&startstop,drive,DRQ_STAT,BUSY_STAT,WAIT_READY)) {
printk(KERN_ERR "ide-tape: Strange, packet command initiated yet DRQ isn't asserted\n");
return startstop;
}
- ireason.all = hwif->INB(IDE_IREASON_REG);
- while (retries-- && (!ireason.b.cod || ireason.b.io)) {
+ ireason = hwif->INB(IDE_IREASON_REG);
+ while (retries-- && ((ireason & CD) == 0 || (ireason & IO))) {
printk(KERN_ERR "ide-tape: (IO,CoD != (0,1) while issuing "
"a packet command, retrying\n");
udelay(100);
- ireason.all = hwif->INB(IDE_IREASON_REG);
+ ireason = hwif->INB(IDE_IREASON_REG);
if (retries == 0) {
printk(KERN_ERR "ide-tape: (IO,CoD != (0,1) while "
"issuing a packet command, ignoring\n");
- ireason.b.cod = 1;
- ireason.b.io = 0;
+ ireason |= CD;
+ ireason &= ~IO;
}
}
- if (!ireason.b.cod || ireason.b.io) {
+ if ((ireason & CD) == 0 || (ireason & IO)) {
printk(KERN_ERR "ide-tape: (IO,CoD) != (0,1) while issuing "
"a packet command\n");
return ide_do_reset(drive);
{
ide_hwif_t *hwif = drive->hwif;
idetape_tape_t *tape = drive->driver_data;
- atapi_bcount_t bcount;
int dma_ok = 0;
+ u16 bcount;
#if IDETAPE_DEBUG_BUGS
if (tape->pc->c[0] == IDETAPE_REQUEST_SENSE_CMD &&
pc->actually_transferred = 0;
pc->current_position = pc->buffer;
/* Request to transfer the entire buffer at once */
- bcount.all = pc->request_transfer;
+ bcount = pc->request_transfer;
if (test_and_clear_bit(PC_DMA_ERROR, &pc->flags)) {
printk(KERN_WARNING "ide-tape: DMA disabled, "
"reverting to PIO\n");
- (void)__ide_dma_off(drive);
+ ide_dma_off(drive);
}
if (test_bit(PC_DMA_RECOMMENDED, &pc->flags) && drive->using_dma)
dma_ok = !hwif->dma_setup(drive);
- if (IDE_CONTROL_REG)
- hwif->OUTB(drive->ctl, IDE_CONTROL_REG);
- hwif->OUTB(dma_ok ? 1 : 0, IDE_FEATURE_REG); /* Use PIO/DMA */
- hwif->OUTB(bcount.b.high, IDE_BCOUNTH_REG);
- hwif->OUTB(bcount.b.low, IDE_BCOUNTL_REG);
- hwif->OUTB(drive->select.all, IDE_SELECT_REG);
+ ide_pktcmd_tf_load(drive, IDE_TFLAG_NO_SELECT_MASK |
+ IDE_TFLAG_OUT_DEVICE, bcount, dma_ok);
+
if (dma_ok) /* Will begin DMA later */
set_bit(PC_DMA_IN_PROGRESS, &pc->flags);
if (test_bit(IDETAPE_DRQ_INTERRUPT, &tape->flags)) {
{
idetape_tape_t *tape = drive->driver_data;
idetape_pc_t *pc = tape->pc;
- atapi_status_t status;
+ u8 stat;
- status.all = HWIF(drive)->INB(IDE_STATUS_REG);
- if (status.b.dsc) {
- if (status.b.check) {
+ stat = drive->hwif->INB(IDE_STATUS_REG);
+ if (stat & SEEK_STAT) {
+ if (stat & ERR_STAT) {
/* Error detected */
if (pc->c[0] != IDETAPE_TEST_UNIT_READY_CMD)
printk(KERN_ERR "ide-tape: %s: I/O error, ",
}
if (time_after(jiffies, tape->insert_time))
tape->insert_speed = tape->insert_size / 1024 * HZ / (jiffies - tape->insert_time);
- if (jiffies - tape->avg_time >= HZ) {
+ if (time_after_eq(jiffies, tape->avg_time + HZ)) {
tape->avg_speed = tape->avg_size * HZ / (jiffies - tape->avg_time) / 1024;
tape->avg_size = 0;
tape->avg_time = jiffies;
idetape_tape_t *tape = drive->driver_data;
idetape_pc_t *pc = NULL;
struct request *postponed_rq = tape->postponed_rq;
- atapi_status_t status;
+ u8 stat;
#if IDETAPE_DEBUG_LOG
#if 0
if (tape->debug_level >= 5)
- printk(KERN_INFO "ide-tape: rq_status: %d, "
- "dev: %s, cmd: %ld, errors: %d\n", rq->rq_status,
+ printk(KERN_INFO "ide-tape: %d, "
+ "dev: %s, cmd: %ld, errors: %d\n",
rq->rq_disk->disk_name, rq->cmd[0], rq->errors);
#endif
if (tape->debug_level >= 2)
rq->sector, rq->nr_sectors, rq->current_nr_sectors);
#endif /* IDETAPE_DEBUG_LOG */
- if ((rq->flags & REQ_SPECIAL) == 0) {
+ if (!blk_special_request(rq)) {
/*
* We do not support buffer cache originated requests.
*/
printk(KERN_NOTICE "ide-tape: %s: Unsupported request in "
- "request queue (%ld)\n", drive->name, rq->flags);
+ "request queue (%d)\n", drive->name, rq->cmd_type);
ide_end_request(drive, 0, 0);
return ide_stopped;
}
* If the tape is still busy, postpone our request and service
* the other device meanwhile.
*/
- status.all = HWIF(drive)->INB(IDE_STATUS_REG);
+ stat = drive->hwif->INB(IDE_STATUS_REG);
if (!drive->dsc_overlap && !(rq->cmd[0] & REQ_IDETAPE_PC2))
set_bit(IDETAPE_IGNORE_DSC, &tape->flags);
tape->insert_speed = tape->insert_size / 1024 * HZ / (jiffies - tape->insert_time);
calculate_speeds(drive);
if (!test_and_clear_bit(IDETAPE_IGNORE_DSC, &tape->flags) &&
- !status.b.dsc) {
+ (stat & SEEK_STAT) == 0) {
if (postponed_rq == NULL) {
tape->dsc_polling_start = jiffies;
tape->dsc_polling_frequency = tape->best_dsc_rw_frequency;
} else {
return ide_do_reset(drive);
}
- } else if (jiffies - tape->dsc_polling_start > IDETAPE_DSC_MA_THRESHOLD)
+ } else if (time_after(jiffies, tape->dsc_polling_start + IDETAPE_DSC_MA_THRESHOLD))
tape->dsc_polling_frequency = IDETAPE_DSC_MA_SLOW;
idetape_postpone_request(drive);
return ide_stopped;
}
if (rq->cmd[0] & REQ_IDETAPE_READ) {
tape->buffer_head++;
-#if USE_IOTRACE
- IO_trace(IO_IDETAPE_FIFO, tape->pipeline_head, tape->buffer_head, tape->tape_head, tape->minor);
-#endif
tape->postpone_cnt = 0;
pc = idetape_next_pc_storage(drive);
idetape_create_read_cmd(tape, pc, rq->current_nr_sectors, (struct idetape_bh *)rq->special);
}
if (rq->cmd[0] & REQ_IDETAPE_WRITE) {
tape->buffer_head++;
-#if USE_IOTRACE
- IO_trace(IO_IDETAPE_FIFO, tape->pipeline_head, tape->buffer_head, tape->tape_head, tape->minor);
-#endif
tape->postpone_cnt = 0;
pc = idetape_next_pc_storage(drive);
idetape_create_write_cmd(tape, pc, rq->current_nr_sectors, (struct idetape_bh *)rq->special);
int pages = tape->pages_per_stage;
char *b_data = NULL;
- if ((stage = (idetape_stage_t *) kmalloc (sizeof (idetape_stage_t),GFP_KERNEL)) == NULL)
+ if ((stage = kmalloc(sizeof (idetape_stage_t),GFP_KERNEL)) == NULL)
return NULL;
stage->next = NULL;
- bh = stage->bh = (struct idetape_bh *)kmalloc(sizeof(struct idetape_bh), GFP_KERNEL);
+ bh = stage->bh = kmalloc(sizeof(struct idetape_bh), GFP_KERNEL);
if (bh == NULL)
goto abort;
bh->b_reqnext = NULL;
continue;
}
prev_bh = bh;
- if ((bh = (struct idetape_bh *)kmalloc(sizeof(struct idetape_bh), GFP_KERNEL)) == NULL) {
+ if ((bh = kmalloc(sizeof(struct idetape_bh), GFP_KERNEL)) == NULL) {
free_page((unsigned long) b_data);
goto abort;
}
return __idetape_kmalloc_stage(tape, 0, 0);
}
-static void idetape_copy_stage_from_user (idetape_tape_t *tape, idetape_stage_t *stage, const char __user *buf, int n)
+static int idetape_copy_stage_from_user (idetape_tape_t *tape, idetape_stage_t *stage, const char __user *buf, int n)
{
struct idetape_bh *bh = tape->bh;
int count;
+ int ret = 0;
while (n) {
#if IDETAPE_DEBUG_BUGS
if (bh == NULL) {
printk(KERN_ERR "ide-tape: bh == NULL in "
"idetape_copy_stage_from_user\n");
- return;
+ return 1;
}
#endif /* IDETAPE_DEBUG_BUGS */
count = min((unsigned int)(bh->b_size - atomic_read(&bh->b_count)), (unsigned int)n);
- copy_from_user(bh->b_data + atomic_read(&bh->b_count), buf, count);
+ if (copy_from_user(bh->b_data + atomic_read(&bh->b_count), buf, count))
+ ret = 1;
n -= count;
atomic_add(count, &bh->b_count);
buf += count;
}
}
tape->bh = bh;
+ return ret;
}
-static void idetape_copy_stage_to_user (idetape_tape_t *tape, char __user *buf, idetape_stage_t *stage, int n)
+static int idetape_copy_stage_to_user (idetape_tape_t *tape, char __user *buf, idetape_stage_t *stage, int n)
{
struct idetape_bh *bh = tape->bh;
int count;
+ int ret = 0;
while (n) {
#if IDETAPE_DEBUG_BUGS
if (bh == NULL) {
printk(KERN_ERR "ide-tape: bh == NULL in "
"idetape_copy_stage_to_user\n");
- return;
+ return 1;
}
#endif /* IDETAPE_DEBUG_BUGS */
count = min(tape->b_count, n);
- copy_to_user(buf, tape->b_data, count);
+ if (copy_to_user(buf, tape->b_data, count))
+ ret = 1;
n -= count;
tape->b_data += count;
tape->b_count -= count;
}
}
}
+ return ret;
}
static void idetape_init_merge_stage (idetape_tape_t *tape)
*/
static void idetape_wait_for_request (ide_drive_t *drive, struct request *rq)
{
- DECLARE_COMPLETION(wait);
+ DECLARE_COMPLETION_ONSTACK(wait);
idetape_tape_t *tape = drive->driver_data;
#if IDETAPE_DEBUG_BUGS
- if (rq == NULL || (rq->flags & REQ_SPECIAL) == 0) {
+ if (rq == NULL || !blk_special_request(rq)) {
printk (KERN_ERR "ide-tape: bug: Trying to sleep on non-valid request\n");
return;
}
#endif /* IDETAPE_DEBUG_BUGS */
- rq->waiting = &wait;
+ rq->end_io_data = &wait;
rq->end_io = blk_end_sync_rq;
spin_unlock_irq(&tape->spinlock);
wait_for_completion(&wait);
idetape_switch_buffers(tape, new_stage);
idetape_add_stage_tail(drive, new_stage);
tape->pipeline_head++;
-#if USE_IOTRACE
- IO_trace(IO_IDETAPE_FIFO, tape->pipeline_head, tape->buffer_head, tape->tape_head, tape->minor);
-#endif
calculate_speeds(drive);
/*
idetape_remove_stage_head(drive);
spin_unlock_irqrestore(&tape->spinlock, flags);
tape->pipeline_head++;
-#if USE_IOTRACE
- IO_trace(IO_IDETAPE_FIFO, tape->pipeline_head, tape->buffer_head, tape->tape_head, tape->minor);
-#endif
calculate_speeds(drive);
}
#if IDETAPE_DEBUG_BUGS
struct ide_tape_obj *tape = ide_tape_f(file);
ide_drive_t *drive = tape->drive;
ssize_t bytes_read,temp, actually_read = 0, rc;
+ ssize_t ret = 0;
#if IDETAPE_DEBUG_LOG
if (tape->debug_level >= 3)
return (0);
if (tape->merge_stage_size) {
actually_read = min((unsigned int)(tape->merge_stage_size), (unsigned int)count);
- idetape_copy_stage_to_user(tape, buf, tape->merge_stage, actually_read);
+ if (idetape_copy_stage_to_user(tape, buf, tape->merge_stage, actually_read))
+ ret = -EFAULT;
buf += actually_read;
tape->merge_stage_size -= actually_read;
count -= actually_read;
bytes_read = idetape_add_chrdev_read_request(drive, tape->capabilities.ctl);
if (bytes_read <= 0)
goto finish;
- idetape_copy_stage_to_user(tape, buf, tape->merge_stage, bytes_read);
+ if (idetape_copy_stage_to_user(tape, buf, tape->merge_stage, bytes_read))
+ ret = -EFAULT;
buf += bytes_read;
count -= bytes_read;
actually_read += bytes_read;
if (bytes_read <= 0)
goto finish;
temp = min((unsigned long)count, (unsigned long)bytes_read);
- idetape_copy_stage_to_user(tape, buf, tape->merge_stage, temp);
+ if (idetape_copy_stage_to_user(tape, buf, tape->merge_stage, temp))
+ ret = -EFAULT;
actually_read += temp;
tape->merge_stage_size = bytes_read-temp;
}
idetape_space_over_filemarks(drive, MTFSF, 1);
return 0;
}
- return actually_read;
+
+ return (ret) ? ret : actually_read;
}
static ssize_t idetape_chrdev_write (struct file *file, const char __user *buf,
{
struct ide_tape_obj *tape = ide_tape_f(file);
ide_drive_t *drive = tape->drive;
- ssize_t retval, actually_written = 0;
+ ssize_t actually_written = 0;
+ ssize_t ret = 0;
/* The drive is write protected. */
if (tape->write_prot)
* some drives (Seagate STT3401A) will return an error.
*/
if (drive->dsc_overlap) {
- retval = idetape_queue_rw_tail(drive, REQ_IDETAPE_WRITE, 0, tape->merge_stage->bh);
+ ssize_t retval = idetape_queue_rw_tail(drive, REQ_IDETAPE_WRITE, 0, tape->merge_stage->bh);
if (retval < 0) {
__idetape_kfree_stage(tape->merge_stage);
tape->merge_stage = NULL;
}
#endif /* IDETAPE_DEBUG_BUGS */
actually_written = min((unsigned int)(tape->stage_size - tape->merge_stage_size), (unsigned int)count);
- idetape_copy_stage_from_user(tape, tape->merge_stage, buf, actually_written);
+ if (idetape_copy_stage_from_user(tape, tape->merge_stage, buf, actually_written))
+ ret = -EFAULT;
buf += actually_written;
tape->merge_stage_size += actually_written;
count -= actually_written;
if (tape->merge_stage_size == tape->stage_size) {
+ ssize_t retval;
tape->merge_stage_size = 0;
retval = idetape_add_chrdev_write_request(drive, tape->capabilities.ctl);
if (retval <= 0)
}
}
while (count >= tape->stage_size) {
- idetape_copy_stage_from_user(tape, tape->merge_stage, buf, tape->stage_size);
+ ssize_t retval;
+ if (idetape_copy_stage_from_user(tape, tape->merge_stage, buf, tape->stage_size))
+ ret = -EFAULT;
buf += tape->stage_size;
count -= tape->stage_size;
retval = idetape_add_chrdev_write_request(drive, tape->capabilities.ctl);
}
if (count) {
actually_written += count;
- idetape_copy_stage_from_user(tape, tape->merge_stage, buf, count);
+ if (idetape_copy_stage_from_user(tape, tape->merge_stage, buf, count))
+ ret = -EFAULT;
tape->merge_stage_size += count;
}
- return (actually_written);
+ return (ret) ? ret : actually_written;
}
static int idetape_write_filemark (ide_drive_t *drive)
printk(KERN_INFO "ide-tape: Adjusted block size - %d\n", tape->tape_block_size);
#endif /* IDETAPE_DEBUG_INFO */
}
+
+#ifdef CONFIG_IDE_PROC_FS
static void idetape_add_settings (ide_drive_t *drive)
{
idetape_tape_t *tape = drive->driver_data;
/*
- * drive setting name read/write ioctl ioctl data type min max mul_factor div_factor data pointer set function
+ * drive setting name read/write data type min max mul_factor div_factor data pointer set function
*/
- ide_add_setting(drive, "buffer", SETTING_READ, -1, -1, TYPE_SHORT, 0, 0xffff, 1, 2, &tape->capabilities.buffer_size, NULL);
- ide_add_setting(drive, "pipeline_min", SETTING_RW, -1, -1, TYPE_INT, 1, 0xffff, tape->stage_size / 1024, 1, &tape->min_pipeline, NULL);
- ide_add_setting(drive, "pipeline", SETTING_RW, -1, -1, TYPE_INT, 1, 0xffff, tape->stage_size / 1024, 1, &tape->max_stages, NULL);
- ide_add_setting(drive, "pipeline_max", SETTING_RW, -1, -1, TYPE_INT, 1, 0xffff, tape->stage_size / 1024, 1, &tape->max_pipeline, NULL);
- ide_add_setting(drive, "pipeline_used",SETTING_READ, -1, -1, TYPE_INT, 0, 0xffff, tape->stage_size / 1024, 1, &tape->nr_stages, NULL);
- ide_add_setting(drive, "pipeline_pending",SETTING_READ,-1, -1, TYPE_INT, 0, 0xffff, tape->stage_size / 1024, 1, &tape->nr_pending_stages, NULL);
- ide_add_setting(drive, "speed", SETTING_READ, -1, -1, TYPE_SHORT, 0, 0xffff, 1, 1, &tape->capabilities.speed, NULL);
- ide_add_setting(drive, "stage", SETTING_READ, -1, -1, TYPE_INT, 0, 0xffff, 1, 1024, &tape->stage_size, NULL);
- ide_add_setting(drive, "tdsc", SETTING_RW, -1, -1, TYPE_INT, IDETAPE_DSC_RW_MIN, IDETAPE_DSC_RW_MAX, 1000, HZ, &tape->best_dsc_rw_frequency, NULL);
- ide_add_setting(drive, "dsc_overlap", SETTING_RW, -1, -1, TYPE_BYTE, 0, 1, 1, 1, &drive->dsc_overlap, NULL);
- ide_add_setting(drive, "pipeline_head_speed_c",SETTING_READ, -1, -1, TYPE_INT, 0, 0xffff, 1, 1, &tape->controlled_pipeline_head_speed, NULL);
- ide_add_setting(drive, "pipeline_head_speed_u",SETTING_READ, -1, -1, TYPE_INT, 0, 0xffff, 1, 1, &tape->uncontrolled_pipeline_head_speed, NULL);
- ide_add_setting(drive, "avg_speed", SETTING_READ, -1, -1, TYPE_INT, 0, 0xffff, 1, 1, &tape->avg_speed, NULL);
- ide_add_setting(drive, "debug_level",SETTING_RW, -1, -1, TYPE_INT, 0, 0xffff, 1, 1, &tape->debug_level, NULL);
+ ide_add_setting(drive, "buffer", SETTING_READ, TYPE_SHORT, 0, 0xffff, 1, 2, &tape->capabilities.buffer_size, NULL);
+ ide_add_setting(drive, "pipeline_min", SETTING_RW, TYPE_INT, 1, 0xffff, tape->stage_size / 1024, 1, &tape->min_pipeline, NULL);
+ ide_add_setting(drive, "pipeline", SETTING_RW, TYPE_INT, 1, 0xffff, tape->stage_size / 1024, 1, &tape->max_stages, NULL);
+ ide_add_setting(drive, "pipeline_max", SETTING_RW, TYPE_INT, 1, 0xffff, tape->stage_size / 1024, 1, &tape->max_pipeline, NULL);
+ ide_add_setting(drive, "pipeline_used", SETTING_READ, TYPE_INT, 0, 0xffff, tape->stage_size / 1024, 1, &tape->nr_stages, NULL);
+ ide_add_setting(drive, "pipeline_pending", SETTING_READ, TYPE_INT, 0, 0xffff, tape->stage_size / 1024, 1, &tape->nr_pending_stages, NULL);
+ ide_add_setting(drive, "speed", SETTING_READ, TYPE_SHORT, 0, 0xffff, 1, 1, &tape->capabilities.speed, NULL);
+ ide_add_setting(drive, "stage", SETTING_READ, TYPE_INT, 0, 0xffff, 1, 1024, &tape->stage_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_frequency, NULL);
+ ide_add_setting(drive, "dsc_overlap", SETTING_RW, TYPE_BYTE, 0, 1, 1, 1, &drive->dsc_overlap, NULL);
+ ide_add_setting(drive, "pipeline_head_speed_c",SETTING_READ, TYPE_INT, 0, 0xffff, 1, 1, &tape->controlled_pipeline_head_speed, NULL);
+ ide_add_setting(drive, "pipeline_head_speed_u",SETTING_READ, TYPE_INT, 0, 0xffff, 1, 1, &tape->uncontrolled_pipeline_head_speed,NULL);
+ ide_add_setting(drive, "avg_speed", SETTING_READ, TYPE_INT, 0, 0xffff, 1, 1, &tape->avg_speed, NULL);
+ ide_add_setting(drive, "debug_level", SETTING_RW, TYPE_INT, 0, 0xffff, 1, 1, &tape->debug_level, NULL);
}
+#else
+static inline void idetape_add_settings(ide_drive_t *drive) { ; }
+#endif
/*
* ide_setup is called to:
idetape_add_settings(drive);
}
-static int ide_tape_remove(struct device *dev)
+static void ide_tape_remove(ide_drive_t *drive)
{
- ide_drive_t *drive = to_ide_device(dev);
idetape_tape_t *tape = drive->driver_data;
- ide_unregister_subdriver(drive, tape->driver);
+ ide_proc_unregister_driver(drive, tape->driver);
ide_unregister_region(tape->disk);
ide_tape_put(tape);
-
- return 0;
}
static void ide_tape_release(struct kref *kref)
drive->dsc_overlap = 0;
drive->driver_data = NULL;
- class_device_destroy(idetape_sysfs_class,
- MKDEV(IDETAPE_MAJOR, tape->minor));
- class_device_destroy(idetape_sysfs_class,
- MKDEV(IDETAPE_MAJOR, tape->minor + 128));
- devfs_remove("%s/mt", drive->devfs_name);
- devfs_remove("%s/mtn", drive->devfs_name);
- devfs_unregister_tape(g->number);
+ device_destroy(idetape_sysfs_class, MKDEV(IDETAPE_MAJOR, tape->minor));
+ device_destroy(idetape_sysfs_class, MKDEV(IDETAPE_MAJOR, tape->minor + 128));
idetape_devs[tape->minor] = NULL;
g->private_data = NULL;
put_disk(g);
kfree(tape);
}
-#ifdef CONFIG_PROC_FS
-
+#ifdef CONFIG_IDE_PROC_FS
static int proc_idetape_read_name
(char *page, char **start, off_t off, int count, int *eof, void *data)
{
{ "name", S_IFREG|S_IRUGO, proc_idetape_read_name, NULL },
{ NULL, 0, NULL, NULL }
};
-
-#else
-
-#define idetape_proc NULL
-
#endif
-static int ide_tape_probe(struct device *);
+static int ide_tape_probe(ide_drive_t *);
static ide_driver_t idetape_driver = {
- .owner = THIS_MODULE,
.gen_driver = {
+ .owner = THIS_MODULE,
.name = "ide-tape",
.bus = &ide_bus_type,
- .probe = ide_tape_probe,
- .remove = ide_tape_remove,
},
+ .probe = ide_tape_probe,
+ .remove = ide_tape_remove,
.version = IDETAPE_VERSION,
.media = ide_tape,
.supports_dsc_overlap = 1,
.end_request = idetape_end_request,
.error = __ide_error,
.abort = __ide_abort,
+#ifdef CONFIG_IDE_PROC_FS
.proc = idetape_proc,
+#endif
};
/*
* Our character device supporting functions, passed to register_chrdev.
*/
-static struct file_operations idetape_fops = {
+static const struct file_operations idetape_fops = {
.owner = THIS_MODULE,
.read = idetape_chrdev_read,
.write = idetape_chrdev_write,
{
struct gendisk *disk = inode->i_bdev->bd_disk;
struct ide_tape_obj *tape;
- ide_drive_t *drive;
if (!(tape = ide_tape_get(disk)))
return -ENXIO;
- drive = tape->drive;
-
- drive->usage++;
-
return 0;
}
{
struct gendisk *disk = inode->i_bdev->bd_disk;
struct ide_tape_obj *tape = ide_tape_g(disk);
- ide_drive_t *drive = tape->drive;
-
- drive->usage--;
ide_tape_put(tape);
.ioctl = idetape_ioctl,
};
-static int ide_tape_probe(struct device *dev)
+static int ide_tape_probe(ide_drive_t *drive)
{
- ide_drive_t *drive = to_ide_device(dev);
idetape_tape_t *tape;
struct gendisk *g;
int minor;
printk(KERN_WARNING "ide-tape: Use drive %s with ide-scsi emulation and osst.\n", drive->name);
printk(KERN_WARNING "ide-tape: OnStream support will be removed soon from ide-tape!\n");
}
- tape = (idetape_tape_t *) kzalloc (sizeof (idetape_tape_t), GFP_KERNEL);
+ tape = kzalloc(sizeof (idetape_tape_t), GFP_KERNEL);
if (tape == NULL) {
printk(KERN_ERR "ide-tape: %s: Can't allocate a tape structure\n", drive->name);
goto failed;
ide_init_disk(g, drive);
- ide_register_subdriver(drive, &idetape_driver);
+ ide_proc_register_driver(drive, &idetape_driver);
kref_init(&tape->kref);
drive->driver_data = tape;
- down(&idetape_ref_sem);
+ mutex_lock(&idetape_ref_mutex);
for (minor = 0; idetape_devs[minor]; minor++)
;
idetape_devs[minor] = tape;
- up(&idetape_ref_sem);
+ mutex_unlock(&idetape_ref_mutex);
idetape_setup(drive, tape, minor);
- class_device_create(idetape_sysfs_class, NULL,
- MKDEV(IDETAPE_MAJOR, minor), dev, "%s", tape->name);
- class_device_create(idetape_sysfs_class, NULL,
- MKDEV(IDETAPE_MAJOR, minor + 128), dev, "n%s", tape->name);
-
- devfs_mk_cdev(MKDEV(HWIF(drive)->major, minor),
- S_IFCHR | S_IRUGO | S_IWUGO,
- "%s/mt", drive->devfs_name);
- devfs_mk_cdev(MKDEV(HWIF(drive)->major, minor + 128),
- S_IFCHR | S_IRUGO | S_IWUGO,
- "%s/mtn", drive->devfs_name);
+ device_create(idetape_sysfs_class, &drive->gendev,
+ MKDEV(IDETAPE_MAJOR, minor), "%s", tape->name);
+ device_create(idetape_sysfs_class, &drive->gendev,
+ MKDEV(IDETAPE_MAJOR, minor + 128), "n%s", tape->name);
- g->number = devfs_register_tape(drive->devfs_name);
g->fops = &idetape_block_ops;
ide_register_region(g);
unregister_chrdev(IDETAPE_MAJOR, "ht");
}
-/*
- * idetape_init will register the driver for each tape.
- */
-static int idetape_init (void)
+static int __init idetape_init(void)
{
int error = 1;
idetape_sysfs_class = class_create(THIS_MODULE, "ide_tape");
return error;
}
+MODULE_ALIAS("ide:*m-tape*");
module_init(idetape_init);
module_exit(idetape_exit);
MODULE_ALIAS_CHARDEV_MAJOR(IDETAPE_MAJOR);
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff