#include <linux/major.h>
#include <linux/errno.h>
#include <linux/genhd.h>
+#include <linux/seq_file.h>
#include <linux/slab.h>
#include <linux/pci.h>
#include <linux/ide.h>
#include <asm/unaligned.h>
#include <linux/mtio.h>
-enum {
- /* output errors only */
- DBG_ERR = (1 << 0),
- /* output all sense key/asc */
- DBG_SENSE = (1 << 1),
- /* info regarding all chrdev-related procedures */
- DBG_CHRDEV = (1 << 2),
- /* all remaining procedures */
- DBG_PROCS = (1 << 3),
-};
-
/* define to see debug info */
-#define IDETAPE_DEBUG_LOG 0
+#undef IDETAPE_DEBUG_LOG
-#if IDETAPE_DEBUG_LOG
-#define debug_log(lvl, fmt, args...) \
-{ \
- if (tape->debug_mask & lvl) \
- printk(KERN_INFO "ide-tape: " fmt, ## args); \
-}
+#ifdef IDETAPE_DEBUG_LOG
+#define ide_debug_log(lvl, fmt, args...) __ide_debug_log(lvl, fmt, ## args)
#else
-#define debug_log(lvl, fmt, args...) do {} while (0)
+#define ide_debug_log(lvl, fmt, args...) do {} while (0)
#endif
/**************************** Tunable parameters *****************************/
* other device. Note that at most we will have only one DSC (usually
* data transfer) request in the device request queue.
*/
- struct request *postponed_rq;
+ bool postponed_rq;
+
/* The time in which we started polling for DSC */
unsigned long dsc_polling_start;
/* Timer used to poll for dsc */
char drv_write_prot;
/* the tape is write protected (hardware or opened as read-only) */
char write_prot;
-
- u32 debug_mask;
} idetape_tape_t;
static DEFINE_MUTEX(idetape_ref_mutex);
+static DEFINE_MUTEX(idetape_chrdev_mutex);
+
static struct class *idetape_sysfs_class;
static void ide_tape_release(struct device *);
-static struct ide_tape_obj *ide_tape_get(struct gendisk *disk)
+static struct ide_tape_obj *idetape_devs[MAX_HWIFS * MAX_DRIVES];
+
+static struct ide_tape_obj *ide_tape_get(struct gendisk *disk, bool cdev,
+ unsigned int i)
{
struct ide_tape_obj *tape = NULL;
mutex_lock(&idetape_ref_mutex);
- tape = ide_drv_g(disk, ide_tape_obj);
+
+ if (cdev)
+ tape = idetape_devs[i];
+ else
+ tape = ide_drv_g(disk, ide_tape_obj);
+
if (tape) {
if (ide_device_get(tape->drive))
tape = NULL;
else
get_device(&tape->dev);
}
+
mutex_unlock(&idetape_ref_mutex);
return tape;
}
}
/*
- * The variables below are used for the character device interface. Additional
- * state variables are defined in our ide_drive_t structure.
- */
-static struct ide_tape_obj *idetape_devs[MAX_HWIFS * MAX_DRIVES];
-
-static struct ide_tape_obj *ide_tape_chrdev_get(unsigned int i)
-{
- struct ide_tape_obj *tape = NULL;
-
- mutex_lock(&idetape_ref_mutex);
- tape = idetape_devs[i];
- if (tape)
- get_device(&tape->dev);
- mutex_unlock(&idetape_ref_mutex);
- return tape;
-}
-
-/*
* called on each failed packet command retry to analyze the request sense. We
* currently do not utilize this information.
*/
-static void idetape_analyze_error(ide_drive_t *drive, u8 *sense)
+static void idetape_analyze_error(ide_drive_t *drive)
{
idetape_tape_t *tape = drive->driver_data;
struct ide_atapi_pc *pc = drive->failed_pc;
+ struct request *rq = drive->hwif->rq;
+ u8 *sense = bio_data(rq->bio);
tape->sense_key = sense[2] & 0xF;
tape->asc = sense[12];
tape->ascq = sense[13];
- debug_log(DBG_ERR, "pc = %x, sense key = %x, asc = %x, ascq = %x\n",
- pc->c[0], tape->sense_key, tape->asc, tape->ascq);
+ ide_debug_log(IDE_DBG_FUNC,
+ "cmd: 0x%x, sense key = %x, asc = %x, ascq = %x",
+ rq->cmd[0], tape->sense_key, tape->asc, tape->ascq);
- /* Correct pc->xferred by asking the tape. */
+ /* correct remaining bytes to transfer */
if (pc->flags & PC_FLAG_DMA_ERROR)
- pc->xferred = pc->req_xfer -
- tape->blk_size *
- get_unaligned_be32(&sense[3]);
+ rq->resid_len = tape->blk_size * get_unaligned_be32(&sense[3]);
/*
* If error was the result of a zero-length read or write command,
pc->flags |= PC_FLAG_ABORT;
}
if (!(pc->flags & PC_FLAG_ABORT) &&
- pc->xferred)
+ (blk_rq_bytes(rq) - rq->resid_len))
pc->retries = IDETAPE_MAX_PC_RETRIES + 1;
}
}
int uptodate = pc->error ? 0 : 1;
int err = uptodate ? 0 : IDE_DRV_ERROR_GENERAL;
- debug_log(DBG_PROCS, "Enter %s\n", __func__);
+ ide_debug_log(IDE_DBG_FUNC, "cmd: 0x%x, dsc: %d, err: %d", rq->cmd[0],
+ dsc, err);
if (dsc)
ide_tape_handle_dsc(drive);
if (pc->c[0] == REQUEST_SENSE) {
if (uptodate)
- idetape_analyze_error(drive, pc->buf);
+ idetape_analyze_error(drive);
else
printk(KERN_ERR "ide-tape: Error in REQUEST SENSE "
"itself - Aborting request!\n");
} else if (pc->c[0] == READ_6 || pc->c[0] == WRITE_6) {
- int blocks = pc->xferred / tape->blk_size;
+ unsigned int blocks =
+ (blk_rq_bytes(rq) - rq->resid_len) / tape->blk_size;
tape->avg_size += blocks * tape->blk_size;
}
tape->first_frame += blocks;
- rq->data_len -= blocks * tape->blk_size;
if (pc->error) {
uptodate = 0;
err = pc->error;
}
- } else if (pc->c[0] == READ_POSITION && uptodate) {
- u8 *readpos = pc->buf;
-
- debug_log(DBG_SENSE, "BOP - %s\n",
- (readpos[0] & 0x80) ? "Yes" : "No");
- debug_log(DBG_SENSE, "EOP - %s\n",
- (readpos[0] & 0x40) ? "Yes" : "No");
-
- if (readpos[0] & 0x4) {
- printk(KERN_INFO "ide-tape: Block location is unknown"
- "to the tape\n");
- clear_bit(IDE_AFLAG_ADDRESS_VALID, &drive->atapi_flags);
- uptodate = 0;
- err = IDE_DRV_ERROR_GENERAL;
- } else {
- debug_log(DBG_SENSE, "Block Location - %u\n",
- be32_to_cpup((__be32 *)&readpos[4]));
-
- tape->partition = readpos[1];
- tape->first_frame = be32_to_cpup((__be32 *)&readpos[4]);
- set_bit(IDE_AFLAG_ADDRESS_VALID, &drive->atapi_flags);
- }
}
-
rq->errors = err;
return uptodate;
* Postpone the current request so that ide.c will be able to service requests
* from another device on the same port while we are polling for DSC.
*/
-static void idetape_postpone_request(ide_drive_t *drive)
+static void ide_tape_stall_queue(ide_drive_t *drive)
{
idetape_tape_t *tape = drive->driver_data;
- debug_log(DBG_PROCS, "Enter %s\n", __func__);
+ ide_debug_log(IDE_DBG_FUNC, "cmd: 0x%x, dsc_poll_freq: %lu",
+ drive->hwif->rq->cmd[0], tape->dsc_poll_freq);
- tape->postponed_rq = drive->hwif->rq;
+ tape->postponed_rq = true;
ide_stall_queue(drive, tape->dsc_poll_freq);
}
tape->dsc_poll_freq = IDETAPE_DSC_MA_FAST;
tape->dsc_timeout = jiffies + IDETAPE_DSC_MA_TIMEOUT;
/* Allow ide.c to handle other requests */
- idetape_postpone_request(drive);
+ ide_tape_stall_queue(drive);
}
/*
struct ide_atapi_pc *pc)
{
idetape_tape_t *tape = drive->driver_data;
+ struct request *rq = drive->hwif->rq;
if (drive->failed_pc == NULL && pc->c[0] != REQUEST_SENSE)
drive->failed_pc = pc;
if (pc->retries > IDETAPE_MAX_PC_RETRIES ||
(pc->flags & PC_FLAG_ABORT)) {
- unsigned int done = blk_rq_bytes(drive->hwif->rq);
/*
* We will "abort" retrying a packet command in case legitimate
drive->failed_pc = NULL;
drive->pc_callback(drive, 0);
- ide_complete_rq(drive, -EIO, done);
+ ide_complete_rq(drive, -EIO, blk_rq_bytes(rq));
return ide_stopped;
}
- debug_log(DBG_SENSE, "Retry #%d, cmd = %02X\n", pc->retries, pc->c[0]);
+ ide_debug_log(IDE_DBG_SENSE, "retry #%d, cmd: 0x%02x", pc->retries,
+ pc->c[0]);
pc->retries++;
struct ide_atapi_pc *pc, struct request *rq,
u8 opcode)
{
- unsigned int length = rq->nr_sectors;
+ unsigned int length = blk_rq_sectors(rq) / (tape->blk_size >> 9);
ide_init_pc(pc);
put_unaligned(cpu_to_be32(length), (unsigned int *) &pc->c[1]);
pc->c[1] = 1;
- pc->bh = NULL;
- pc->buf = NULL;
- pc->buf_size = length * tape->blk_size;
- pc->req_xfer = pc->buf_size;
- if (pc->req_xfer == tape->buffer_size)
+
+ if (blk_rq_bytes(rq) == tape->buffer_size)
pc->flags |= PC_FLAG_DMA_OK;
if (opcode == READ_6)
ide_hwif_t *hwif = drive->hwif;
idetape_tape_t *tape = drive->driver_data;
struct ide_atapi_pc *pc = NULL;
- struct request *postponed_rq = tape->postponed_rq;
struct ide_cmd cmd;
u8 stat;
- debug_log(DBG_SENSE, "sector: %llu, nr_sectors: %lu\n"
- (unsigned long long)rq->sector, rq->nr_sectors);
+ ide_debug_log(IDE_DBG_RQ, "cmd: 0x%x, sector: %llu, nr_sectors: %u",
+ rq->cmd[0], (unsigned long long)blk_rq_pos(rq),
+ blk_rq_sectors(rq));
- if (!(blk_special_request(rq) || blk_sense_request(rq))) {
- /* We do not support buffer cache originated requests. */
- printk(KERN_NOTICE "ide-tape: %s: Unsupported request in "
- "request queue (%d)\n", drive->name, rq->cmd_type);
- if (blk_fs_request(rq) == 0 && rq->errors == 0)
- rq->errors = -EIO;
- ide_complete_rq(drive, -EIO, ide_rq_bytes(rq));
- return ide_stopped;
- }
+ BUG_ON(!(blk_special_request(rq) || blk_sense_request(rq)));
/* Retry a failed packet command */
if (drive->failed_pc && drive->pc->c[0] == REQUEST_SENSE) {
goto out;
}
- if (postponed_rq != NULL)
- if (rq != postponed_rq) {
- printk(KERN_ERR "ide-tape: ide-tape.c bug - "
- "Two DSC requests were queued\n");
- drive->failed_pc = NULL;
- rq->errors = 0;
- ide_complete_rq(drive, 0, blk_rq_bytes(rq));
- return ide_stopped;
- }
-
- tape->postponed_rq = NULL;
-
/*
* If the tape is still busy, postpone our request and service
* the other device meanwhile.
if ((drive->dev_flags & IDE_DFLAG_DSC_OVERLAP) == 0 &&
(rq->cmd[13] & REQ_IDETAPE_PC2) == 0)
- set_bit(IDE_AFLAG_IGNORE_DSC, &drive->atapi_flags);
+ drive->atapi_flags |= IDE_AFLAG_IGNORE_DSC;
if (drive->dev_flags & IDE_DFLAG_POST_RESET) {
- set_bit(IDE_AFLAG_IGNORE_DSC, &drive->atapi_flags);
+ drive->atapi_flags |= IDE_AFLAG_IGNORE_DSC;
drive->dev_flags &= ~IDE_DFLAG_POST_RESET;
}
- if (!test_and_clear_bit(IDE_AFLAG_IGNORE_DSC, &drive->atapi_flags) &&
- (stat & ATA_DSC) == 0) {
- if (postponed_rq == NULL) {
+ if (!(drive->atapi_flags & IDE_AFLAG_IGNORE_DSC) &&
+ !(stat & ATA_DSC)) {
+ if (!tape->postponed_rq) {
tape->dsc_polling_start = jiffies;
tape->dsc_poll_freq = tape->best_dsc_rw_freq;
tape->dsc_timeout = jiffies + IDETAPE_DSC_RW_TIMEOUT;
tape->dsc_polling_start +
IDETAPE_DSC_MA_THRESHOLD))
tape->dsc_poll_freq = IDETAPE_DSC_MA_SLOW;
- idetape_postpone_request(drive);
+ ide_tape_stall_queue(drive);
return ide_stopped;
+ } else {
+ drive->atapi_flags &= ~IDE_AFLAG_IGNORE_DSC;
+ tape->postponed_rq = false;
}
+
if (rq->cmd[13] & REQ_IDETAPE_READ) {
pc = &tape->queued_pc;
ide_tape_create_rw_cmd(tape, pc, rq, READ_6);
cmd.rq = rq;
- ide_init_sg_cmd(&cmd, pc->req_xfer);
+ ide_init_sg_cmd(&cmd, blk_rq_bytes(rq));
ide_map_sg(drive, &cmd);
return ide_tape_issue_pc(drive, &cmd, pc);
int load_attempted = 0;
/* Wait for the tape to become ready */
- set_bit(IDE_AFLAG_MEDIUM_PRESENT, &drive->atapi_flags);
+ set_bit(ilog2(IDE_AFLAG_MEDIUM_PRESENT), &drive->atapi_flags);
timeout += jiffies;
while (time_before(jiffies, timeout)) {
if (ide_do_test_unit_ready(drive, disk) == 0)
int rc;
idetape_create_write_filemark_cmd(drive, &pc, 0);
- rc = ide_queue_pc_tail(drive, tape->disk, &pc);
+ rc = ide_queue_pc_tail(drive, tape->disk, &pc, NULL, 0);
if (rc)
return rc;
idetape_wait_ready(drive, 60 * 5 * HZ);
return 0;
}
-static void idetape_create_read_position_cmd(struct ide_atapi_pc *pc)
-{
- ide_init_pc(pc);
- pc->c[0] = READ_POSITION;
- pc->req_xfer = 20;
-}
-
-static int idetape_read_position(ide_drive_t *drive)
+static int ide_tape_read_position(ide_drive_t *drive)
{
idetape_tape_t *tape = drive->driver_data;
struct ide_atapi_pc pc;
- int position;
+ u8 buf[20];
+
+ ide_debug_log(IDE_DBG_FUNC, "enter");
- debug_log(DBG_PROCS, "Enter %s\n", __func__);
+ /* prep cmd */
+ ide_init_pc(&pc);
+ pc.c[0] = READ_POSITION;
+ pc.req_xfer = 20;
- idetape_create_read_position_cmd(&pc);
- if (ide_queue_pc_tail(drive, tape->disk, &pc))
+ if (ide_queue_pc_tail(drive, tape->disk, &pc, buf, pc.req_xfer))
return -1;
- position = tape->first_frame;
- return position;
+
+ if (!pc.error) {
+ ide_debug_log(IDE_DBG_FUNC, "BOP - %s",
+ (buf[0] & 0x80) ? "Yes" : "No");
+ ide_debug_log(IDE_DBG_FUNC, "EOP - %s",
+ (buf[0] & 0x40) ? "Yes" : "No");
+
+ if (buf[0] & 0x4) {
+ printk(KERN_INFO "ide-tape: Block location is unknown"
+ "to the tape\n");
+ clear_bit(ilog2(IDE_AFLAG_ADDRESS_VALID),
+ &drive->atapi_flags);
+ return -1;
+ } else {
+ ide_debug_log(IDE_DBG_FUNC, "Block Location: %u",
+ be32_to_cpup((__be32 *)&buf[4]));
+
+ tape->partition = buf[1];
+ tape->first_frame = be32_to_cpup((__be32 *)&buf[4]);
+ set_bit(ilog2(IDE_AFLAG_ADDRESS_VALID),
+ &drive->atapi_flags);
+ }
+ }
+
+ return tape->first_frame;
}
static void idetape_create_locate_cmd(ide_drive_t *drive,
if (tape->chrdev_dir != IDETAPE_DIR_READ)
return;
- clear_bit(IDE_AFLAG_FILEMARK, &drive->atapi_flags);
+ clear_bit(ilog2(IDE_AFLAG_FILEMARK), &drive->atapi_flags);
tape->valid = 0;
if (tape->buf != NULL) {
kfree(tape->buf);
{
idetape_tape_t *tape = drive->driver_data;
struct gendisk *disk = tape->disk;
- int retval;
+ int ret;
struct ide_atapi_pc pc;
if (tape->chrdev_dir == IDETAPE_DIR_READ)
__ide_tape_discard_merge_buffer(drive);
idetape_wait_ready(drive, 60 * 5 * HZ);
idetape_create_locate_cmd(drive, &pc, block, partition, skip);
- retval = ide_queue_pc_tail(drive, disk, &pc);
- if (retval)
- return (retval);
+ ret = ide_queue_pc_tail(drive, disk, &pc, NULL, 0);
+ if (ret)
+ return ret;
- idetape_create_read_position_cmd(&pc);
- return ide_queue_pc_tail(drive, disk, &pc);
+ ret = ide_tape_read_position(drive);
+ if (ret < 0)
+ return ret;
+ return 0;
}
static void ide_tape_discard_merge_buffer(ide_drive_t *drive,
__ide_tape_discard_merge_buffer(drive);
if (restore_position) {
- position = idetape_read_position(drive);
+ position = ide_tape_read_position(drive);
seek = position > 0 ? position : 0;
if (idetape_position_tape(drive, seek, 0, 0)) {
printk(KERN_INFO "ide-tape: %s: position_tape failed in"
struct request *rq;
int ret;
- debug_log(DBG_SENSE, "%s: cmd=%d\n", __func__, cmd);
+ ide_debug_log(IDE_DBG_FUNC, "cmd: 0x%x, size: %d", cmd, size);
+
BUG_ON(cmd != REQ_IDETAPE_READ && cmd != REQ_IDETAPE_WRITE);
BUG_ON(size < 0 || size % tape->blk_size);
rq->cmd_type = REQ_TYPE_SPECIAL;
rq->cmd[13] = cmd;
rq->rq_disk = tape->disk;
- rq->sector = tape->first_frame;
+ rq->__sector = tape->first_frame;
if (size) {
ret = blk_rq_map_kern(drive->queue, rq, tape->buf, size,
blk_execute_rq(drive->queue, tape->disk, rq, 0);
/* calculate the number of transferred bytes and update buffer state */
- size -= rq->data_len;
+ size -= rq->resid_len;
tape->cur = tape->buf;
if (cmd == REQ_IDETAPE_READ)
tape->valid = size;
pc->flags |= PC_FLAG_WAIT_FOR_DSC;
}
-/* Queue up a character device originated write request. */
-static int idetape_add_chrdev_write_request(ide_drive_t *drive, int size)
-{
- debug_log(DBG_CHRDEV, "Enter %s\n", __func__);
-
- return idetape_queue_rw_tail(drive, REQ_IDETAPE_WRITE, size);
-}
-
static void ide_tape_flush_merge_buffer(ide_drive_t *drive)
{
idetape_tape_t *tape = drive->driver_data;
size_t aligned = roundup(tape->valid, tape->blk_size);
memset(tape->cur, 0, aligned - tape->valid);
- idetape_add_chrdev_write_request(drive, aligned);
+ idetape_queue_rw_tail(drive, REQ_IDETAPE_WRITE, aligned);
kfree(tape->buf);
tape->buf = NULL;
}
return 0;
}
-/* called from idetape_chrdev_read() to service a chrdev read request. */
-static int idetape_add_chrdev_read_request(ide_drive_t *drive, int size)
-{
- debug_log(DBG_PROCS, "Enter %s, %d bytes\n", __func__, size);
-
- /* If we are at a filemark, return a read length of 0 */
- if (test_bit(IDE_AFLAG_FILEMARK, &drive->atapi_flags))
- return 0;
-
- idetape_init_rw(drive, IDETAPE_DIR_READ);
-
- return idetape_queue_rw_tail(drive, REQ_IDETAPE_READ, size);
-}
-
static void idetape_pad_zeros(ide_drive_t *drive, int bcount)
{
idetape_tape_t *tape = drive->driver_data;
{
struct ide_tape_obj *tape = drive->driver_data;
struct gendisk *disk = tape->disk;
- int retval;
struct ide_atapi_pc pc;
+ int ret;
- debug_log(DBG_SENSE, "Enter %s\n", __func__);
+ ide_debug_log(IDE_DBG_FUNC, "enter");
idetape_create_rewind_cmd(drive, &pc);
- retval = ide_queue_pc_tail(drive, disk, &pc);
- if (retval)
- return retval;
+ ret = ide_queue_pc_tail(drive, disk, &pc, NULL, 0);
+ if (ret)
+ return ret;
- idetape_create_read_position_cmd(&pc);
- retval = ide_queue_pc_tail(drive, disk, &pc);
- if (retval)
- return retval;
+ ret = ide_tape_read_position(drive);
+ if (ret < 0)
+ return ret;
return 0;
}
int nr_stages;
} config;
- debug_log(DBG_PROCS, "Enter %s\n", __func__);
+ ide_debug_log(IDE_DBG_FUNC, "cmd: 0x%04x", cmd);
switch (cmd) {
case 0x0340:
tape->best_dsc_rw_freq = config.dsc_rw_frequency;
break;
case 0x0350:
+ memset(&config, 0, sizeof(config));
config.dsc_rw_frequency = (int) tape->best_dsc_rw_freq;
config.nr_stages = 1;
if (copy_to_user(argp, &config, sizeof(config)))
int retval, count = 0;
int sprev = !!(tape->caps[4] & 0x20);
+
+ ide_debug_log(IDE_DBG_FUNC, "mt_op: %d, mt_count: %d", mt_op, mt_count);
+
if (mt_count == 0)
return 0;
if (MTBSF == mt_op || MTBSFM == mt_op) {
if (tape->chrdev_dir == IDETAPE_DIR_READ) {
tape->valid = 0;
- if (test_and_clear_bit(IDE_AFLAG_FILEMARK, &drive->atapi_flags))
+ if (test_and_clear_bit(ilog2(IDE_AFLAG_FILEMARK),
+ &drive->atapi_flags))
++count;
ide_tape_discard_merge_buffer(drive, 0);
}
case MTBSF:
idetape_create_space_cmd(&pc, mt_count - count,
IDETAPE_SPACE_OVER_FILEMARK);
- return ide_queue_pc_tail(drive, disk, &pc);
+ return ide_queue_pc_tail(drive, disk, &pc, NULL, 0);
case MTFSFM:
case MTBSFM:
if (!sprev)
{
struct ide_tape_obj *tape = file->private_data;
ide_drive_t *drive = tape->drive;
- ssize_t bytes_read, temp, actually_read = 0, rc;
+ size_t done = 0;
ssize_t ret = 0;
+ int rc;
- debug_log(DBG_CHRDEV, "Enter %s, count %Zd\n", __func__, count);
+ ide_debug_log(IDE_DBG_FUNC, "count %Zd", count);
if (tape->chrdev_dir != IDETAPE_DIR_READ) {
- if (test_bit(IDE_AFLAG_DETECT_BS, &drive->atapi_flags))
+ if (test_bit(ilog2(IDE_AFLAG_DETECT_BS), &drive->atapi_flags))
if (count > tape->blk_size &&
(count % tape->blk_size) == 0)
tape->user_bs_factor = count / tape->blk_size;
}
+
rc = idetape_init_rw(drive, IDETAPE_DIR_READ);
if (rc < 0)
return rc;
- if (count == 0)
- return (0);
- if (tape->valid) {
- actually_read = min_t(unsigned int, tape->valid, count);
- if (copy_to_user(buf, tape->cur, actually_read))
- ret = -EFAULT;
- buf += actually_read;
- count -= actually_read;
- tape->cur += actually_read;
- tape->valid -= actually_read;
- }
- while (count >= tape->buffer_size) {
- bytes_read = idetape_add_chrdev_read_request(drive,
- tape->buffer_size);
- if (bytes_read <= 0)
- goto finish;
- if (copy_to_user(buf, tape->cur, bytes_read))
- ret = -EFAULT;
- buf += bytes_read;
- count -= bytes_read;
- actually_read += bytes_read;
- }
- if (count) {
- bytes_read = idetape_add_chrdev_read_request(drive,
- tape->buffer_size);
- if (bytes_read <= 0)
- goto finish;
- temp = min((unsigned long)count, (unsigned long)bytes_read);
- if (copy_to_user(buf, tape->cur, temp))
+
+ while (done < count) {
+ size_t todo;
+
+ /* refill if staging buffer is empty */
+ if (!tape->valid) {
+ /* If we are at a filemark, nothing more to read */
+ if (test_bit(ilog2(IDE_AFLAG_FILEMARK),
+ &drive->atapi_flags))
+ break;
+ /* read */
+ if (idetape_queue_rw_tail(drive, REQ_IDETAPE_READ,
+ tape->buffer_size) <= 0)
+ break;
+ }
+
+ /* copy out */
+ todo = min_t(size_t, count - done, tape->valid);
+ if (copy_to_user(buf + done, tape->cur, todo))
ret = -EFAULT;
- actually_read += temp;
- tape->cur += temp;
- tape->valid -= temp;
+
+ tape->cur += todo;
+ tape->valid -= todo;
+ done += todo;
}
-finish:
- if (!actually_read && test_bit(IDE_AFLAG_FILEMARK, &drive->atapi_flags)) {
- debug_log(DBG_SENSE, "%s: spacing over filemark\n", tape->name);
+ if (!done && test_bit(ilog2(IDE_AFLAG_FILEMARK), &drive->atapi_flags)) {
idetape_space_over_filemarks(drive, MTFSF, 1);
return 0;
}
- return ret ? ret : actually_read;
+ return ret ? ret : done;
}
static ssize_t idetape_chrdev_write(struct file *file, const char __user *buf,
{
struct ide_tape_obj *tape = file->private_data;
ide_drive_t *drive = tape->drive;
- ssize_t actually_written = 0;
+ size_t done = 0;
ssize_t ret = 0;
int rc;
if (tape->write_prot)
return -EACCES;
- debug_log(DBG_CHRDEV, "Enter %s, count %Zd\n", __func__, count);
+ ide_debug_log(IDE_DBG_FUNC, "count %Zd", count);
/* Initialize write operation */
rc = idetape_init_rw(drive, IDETAPE_DIR_WRITE);
if (rc < 0)
return rc;
- if (count == 0)
- return (0);
- if (tape->valid < tape->buffer_size) {
- actually_written = min_t(unsigned int,
- tape->buffer_size - tape->valid,
- count);
- if (copy_from_user(tape->cur, buf, actually_written))
- ret = -EFAULT;
- buf += actually_written;
- count -= actually_written;
- tape->cur += actually_written;
- tape->valid += actually_written;
-
- if (tape->valid == tape->buffer_size) {
- ssize_t retval;
- retval = idetape_add_chrdev_write_request(drive,
- tape->buffer_size);
- if (retval <= 0)
- return (retval);
- }
- }
- while (count >= tape->buffer_size) {
- ssize_t retval;
- if (copy_from_user(tape->cur, buf, tape->buffer_size))
- ret = -EFAULT;
- buf += tape->buffer_size;
- count -= tape->buffer_size;
- retval = idetape_add_chrdev_write_request(drive,
- tape->buffer_size);
- actually_written += tape->buffer_size;
- if (retval <= 0)
- return (retval);
- }
- if (count) {
- actually_written += count;
- if (copy_from_user(tape->cur, buf, count))
+
+ while (done < count) {
+ size_t todo;
+
+ /* flush if staging buffer is full */
+ if (tape->valid == tape->buffer_size &&
+ idetape_queue_rw_tail(drive, REQ_IDETAPE_WRITE,
+ tape->buffer_size) <= 0)
+ return rc;
+
+ /* copy in */
+ todo = min_t(size_t, count - done,
+ tape->buffer_size - tape->valid);
+ if (copy_from_user(tape->cur, buf + done, todo))
ret = -EFAULT;
- tape->cur += count;
- tape->valid += count;
+
+ tape->cur += todo;
+ tape->valid += todo;
+ done += todo;
}
- return ret ? ret : actually_written;
+
+ return ret ? ret : done;
}
static int idetape_write_filemark(ide_drive_t *drive)
/* Write a filemark */
idetape_create_write_filemark_cmd(drive, &pc, 1);
- if (ide_queue_pc_tail(drive, tape->disk, &pc)) {
+ if (ide_queue_pc_tail(drive, tape->disk, &pc, NULL, 0)) {
printk(KERN_ERR "ide-tape: Couldn't write a filemark\n");
return -EIO;
}
struct ide_atapi_pc pc;
int i, retval;
- debug_log(DBG_ERR, "Handling MTIOCTOP ioctl: mt_op=%d, mt_count=%d\n",
- mt_op, mt_count);
+ ide_debug_log(IDE_DBG_FUNC, "MTIOCTOP ioctl: mt_op: %d, mt_count: %d",
+ mt_op, mt_count);
switch (mt_op) {
case MTFSF:
ide_tape_discard_merge_buffer(drive, 0);
retval = ide_do_start_stop(drive, disk, !IDETAPE_LU_LOAD_MASK);
if (!retval)
- clear_bit(IDE_AFLAG_MEDIUM_PRESENT, &drive->atapi_flags);
+ clear_bit(ilog2(IDE_AFLAG_MEDIUM_PRESENT),
+ &drive->atapi_flags);
return retval;
case MTNOP:
ide_tape_discard_merge_buffer(drive, 0);
IDETAPE_LU_RETENSION_MASK | IDETAPE_LU_LOAD_MASK);
case MTEOM:
idetape_create_space_cmd(&pc, 0, IDETAPE_SPACE_TO_EOD);
- return ide_queue_pc_tail(drive, disk, &pc);
+ return ide_queue_pc_tail(drive, disk, &pc, NULL, 0);
case MTERASE:
(void)idetape_rewind_tape(drive);
idetape_create_erase_cmd(&pc);
- return ide_queue_pc_tail(drive, disk, &pc);
+ return ide_queue_pc_tail(drive, disk, &pc, NULL, 0);
case MTSETBLK:
if (mt_count) {
if (mt_count < tape->blk_size ||
mt_count % tape->blk_size)
return -EIO;
tape->user_bs_factor = mt_count / tape->blk_size;
- clear_bit(IDE_AFLAG_DETECT_BS, &drive->atapi_flags);
+ clear_bit(ilog2(IDE_AFLAG_DETECT_BS),
+ &drive->atapi_flags);
} else
- set_bit(IDE_AFLAG_DETECT_BS, &drive->atapi_flags);
+ set_bit(ilog2(IDE_AFLAG_DETECT_BS),
+ &drive->atapi_flags);
return 0;
case MTSEEK:
ide_tape_discard_merge_buffer(drive, 0);
* supported here, and not in the corresponding block interface. Our own
* ide-tape ioctls are supported on both interfaces.
*/
-static int idetape_chrdev_ioctl(struct inode *inode, struct file *file,
+static long do_idetape_chrdev_ioctl(struct file *file,
unsigned int cmd, unsigned long arg)
{
struct ide_tape_obj *tape = file->private_data;
int block_offset = 0, position = tape->first_frame;
void __user *argp = (void __user *)arg;
- debug_log(DBG_CHRDEV, "Enter %s, cmd=%u\n", __func__, cmd);
+ ide_debug_log(IDE_DBG_FUNC, "cmd: 0x%x", cmd);
if (tape->chrdev_dir == IDETAPE_DIR_WRITE) {
ide_tape_flush_merge_buffer(drive);
if (cmd == MTIOCGET || cmd == MTIOCPOS) {
block_offset = tape->valid /
(tape->blk_size * tape->user_bs_factor);
- position = idetape_read_position(drive);
+ position = ide_tape_read_position(drive);
if (position < 0)
return -EIO;
}
}
}
+static long idetape_chrdev_ioctl(struct file *file,
+ unsigned int cmd, unsigned long arg)
+{
+ long ret;
+ lock_kernel();
+ ret = do_idetape_chrdev_ioctl(file, cmd, arg);
+ unlock_kernel();
+ return ret;
+}
+
/*
* Do a mode sense page 0 with block descriptor and if it succeeds set the tape
* block size with the reported value.
{
idetape_tape_t *tape = drive->driver_data;
struct ide_atapi_pc pc;
+ u8 buf[12];
idetape_create_mode_sense_cmd(&pc, IDETAPE_BLOCK_DESCRIPTOR);
- if (ide_queue_pc_tail(drive, tape->disk, &pc)) {
+ if (ide_queue_pc_tail(drive, tape->disk, &pc, buf, pc.req_xfer)) {
printk(KERN_ERR "ide-tape: Can't get block descriptor\n");
if (tape->blk_size == 0) {
printk(KERN_WARNING "ide-tape: Cannot deal with zero "
}
return;
}
- 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;
+ tape->blk_size = (buf[4 + 5] << 16) +
+ (buf[4 + 6] << 8) +
+ buf[4 + 7];
+ tape->drv_write_prot = (buf[2] & 0x80) >> 7;
+
+ ide_debug_log(IDE_DBG_FUNC, "blk_size: %d, write_prot: %d",
+ tape->blk_size, tape->drv_write_prot);
}
static int idetape_chrdev_open(struct inode *inode, struct file *filp)
if (i >= MAX_HWIFS * MAX_DRIVES)
return -ENXIO;
- lock_kernel();
- tape = ide_tape_chrdev_get(i);
+ mutex_lock(&idetape_chrdev_mutex);
+
+ tape = ide_tape_get(NULL, true, i);
if (!tape) {
- unlock_kernel();
+ mutex_unlock(&idetape_chrdev_mutex);
return -ENXIO;
}
- debug_log(DBG_CHRDEV, "Enter %s\n", __func__);
+ drive = tape->drive;
+ filp->private_data = tape;
+
+ ide_debug_log(IDE_DBG_FUNC, "enter");
/*
* We really want to do nonseekable_open(inode, filp); here, but some
*/
filp->f_mode &= ~(FMODE_PREAD | FMODE_PWRITE);
- drive = tape->drive;
-
- filp->private_data = tape;
- if (test_and_set_bit(IDE_AFLAG_BUSY, &drive->atapi_flags)) {
+ if (test_and_set_bit(ilog2(IDE_AFLAG_BUSY), &drive->atapi_flags)) {
retval = -EBUSY;
goto out_put_tape;
}
retval = idetape_wait_ready(drive, 60 * HZ);
if (retval) {
- clear_bit(IDE_AFLAG_BUSY, &drive->atapi_flags);
+ clear_bit(ilog2(IDE_AFLAG_BUSY), &drive->atapi_flags);
printk(KERN_ERR "ide-tape: %s: drive not ready\n", tape->name);
goto out_put_tape;
}
- idetape_read_position(drive);
- if (!test_bit(IDE_AFLAG_ADDRESS_VALID, &drive->atapi_flags))
+ ide_tape_read_position(drive);
+ if (!test_bit(ilog2(IDE_AFLAG_ADDRESS_VALID), &drive->atapi_flags))
(void)idetape_rewind_tape(drive);
/* Read block size and write protect status from drive. */
if (tape->write_prot) {
if ((filp->f_flags & O_ACCMODE) == O_WRONLY ||
(filp->f_flags & O_ACCMODE) == O_RDWR) {
- clear_bit(IDE_AFLAG_BUSY, &drive->atapi_flags);
+ clear_bit(ilog2(IDE_AFLAG_BUSY), &drive->atapi_flags);
retval = -EROFS;
goto out_put_tape;
}
tape->door_locked = DOOR_LOCKED;
}
}
- unlock_kernel();
+ mutex_unlock(&idetape_chrdev_mutex);
+
return 0;
out_put_tape:
ide_tape_put(tape);
- unlock_kernel();
+
+ mutex_unlock(&idetape_chrdev_mutex);
+
return retval;
}
ide_drive_t *drive = tape->drive;
unsigned int minor = iminor(inode);
- lock_kernel();
+ mutex_lock(&idetape_chrdev_mutex);
+
tape = drive->driver_data;
- debug_log(DBG_CHRDEV, "Enter %s\n", __func__);
+ ide_debug_log(IDE_DBG_FUNC, "enter");
if (tape->chrdev_dir == IDETAPE_DIR_WRITE)
idetape_write_release(drive, minor);
ide_tape_discard_merge_buffer(drive, 1);
}
- if (minor < 128 && test_bit(IDE_AFLAG_MEDIUM_PRESENT, &drive->atapi_flags))
+ if (minor < 128 && test_bit(ilog2(IDE_AFLAG_MEDIUM_PRESENT),
+ &drive->atapi_flags))
(void) idetape_rewind_tape(drive);
+
if (tape->chrdev_dir == IDETAPE_DIR_NONE) {
if (tape->door_locked == DOOR_LOCKED) {
if (!ide_set_media_lock(drive, tape->disk, 0))
tape->door_locked = DOOR_UNLOCKED;
}
}
- clear_bit(IDE_AFLAG_BUSY, &drive->atapi_flags);
+ clear_bit(ilog2(IDE_AFLAG_BUSY), &drive->atapi_flags);
ide_tape_put(tape);
- unlock_kernel();
+
+ mutex_unlock(&idetape_chrdev_mutex);
+
return 0;
}
char fw_rev[4], vendor_id[8], product_id[16];
idetape_create_inquiry_cmd(&pc);
- pc.buf = &pc_buf[0];
- pc.buf_size = sizeof(pc_buf);
-
- if (ide_queue_pc_tail(drive, tape->disk, &pc)) {
+ if (ide_queue_pc_tail(drive, tape->disk, &pc, pc_buf, pc.req_xfer)) {
printk(KERN_ERR "ide-tape: %s: can't get INQUIRY results\n",
tape->name);
return;
}
- memcpy(vendor_id, &pc.buf[8], 8);
- memcpy(product_id, &pc.buf[16], 16);
- memcpy(fw_rev, &pc.buf[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, 8, 0);
ide_fixstring(product_id, 16, 0);
{
idetape_tape_t *tape = drive->driver_data;
struct ide_atapi_pc pc;
- u8 *caps;
+ u8 buf[24], *caps;
u8 speed, max_speed;
idetape_create_mode_sense_cmd(&pc, IDETAPE_CAPABILITIES_PAGE);
- if (ide_queue_pc_tail(drive, tape->disk, &pc)) {
+ if (ide_queue_pc_tail(drive, tape->disk, &pc, buf, pc.req_xfer)) {
printk(KERN_ERR "ide-tape: Can't get tape parameters - assuming"
" some default values\n");
tape->blk_size = 512;
put_unaligned(6*52, (u16 *)&tape->caps[16]);
return;
}
- caps = pc.buf + 4 + pc.buf[3];
+ caps = buf + 4 + buf[3];
/* convert to host order and save for later use */
speed = be16_to_cpup((__be16 *)&caps[14]);
ide_devset_rw_flag(dsc_overlap, IDE_DFLAG_DSC_OVERLAP);
-ide_tape_devset_rw_field(debug_mask, debug_mask);
ide_tape_devset_rw_field(tdsc, best_dsc_rw_freq);
ide_tape_devset_r_field(avg_speed, avg_speed);
__IDE_PROC_DEVSET(avg_speed, 0, 0xffff, NULL, NULL),
__IDE_PROC_DEVSET(buffer, 0, 0xffff, NULL, divf_buffer),
__IDE_PROC_DEVSET(buffer_size, 0, 0xffff, NULL, divf_buffer_size),
- __IDE_PROC_DEVSET(debug_mask, 0, 0xffff, NULL, NULL),
__IDE_PROC_DEVSET(dsc_overlap, 0, 1, NULL, NULL),
__IDE_PROC_DEVSET(speed, 0, 0xffff, NULL, NULL),
__IDE_PROC_DEVSET(tdsc, IDETAPE_DSC_RW_MIN, IDETAPE_DSC_RW_MAX,
int buffer_size;
u16 *ctl = (u16 *)&tape->caps[12];
- drive->pc_callback = ide_tape_callback;
+ ide_debug_log(IDE_DBG_FUNC, "minor: %d", minor);
+
+ drive->pc_callback = ide_tape_callback;
drive->dev_flags |= IDE_DFLAG_DSC_OVERLAP;
}
#ifdef CONFIG_IDE_PROC_FS
-static int proc_idetape_read_name
- (char *page, char **start, off_t off, int count, int *eof, void *data)
+static int idetape_name_proc_show(struct seq_file *m, void *v)
{
- ide_drive_t *drive = (ide_drive_t *) data;
+ ide_drive_t *drive = (ide_drive_t *) m->private;
idetape_tape_t *tape = drive->driver_data;
- char *out = page;
- int len;
- len = sprintf(out, "%s\n", tape->name);
- PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
+ seq_printf(m, "%s\n", tape->name);
+ return 0;
+}
+
+static int idetape_name_proc_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, idetape_name_proc_show, PDE(inode)->data);
}
+static const struct file_operations idetape_name_proc_fops = {
+ .owner = THIS_MODULE,
+ .open = idetape_name_proc_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
static ide_proc_entry_t idetape_proc[] = {
- { "capacity", S_IFREG|S_IRUGO, proc_ide_read_capacity, NULL },
- { "name", S_IFREG|S_IRUGO, proc_idetape_read_name, NULL },
- { NULL, 0, NULL, NULL }
+ { "capacity", S_IFREG|S_IRUGO, &ide_capacity_proc_fops },
+ { "name", S_IFREG|S_IRUGO, &idetape_name_proc_fops },
+ {}
};
static ide_proc_entry_t *ide_tape_proc_entries(ide_drive_t *drive)
.owner = THIS_MODULE,
.read = idetape_chrdev_read,
.write = idetape_chrdev_write,
- .ioctl = idetape_chrdev_ioctl,
+ .unlocked_ioctl = idetape_chrdev_ioctl,
.open = idetape_chrdev_open,
.release = idetape_chrdev_release,
};
static int idetape_open(struct block_device *bdev, fmode_t mode)
{
- struct ide_tape_obj *tape = ide_tape_get(bdev->bd_disk);
+ struct ide_tape_obj *tape = ide_tape_get(bdev->bd_disk, false, 0);
if (!tape)
return -ENXIO;
return err;
}
-static struct block_device_operations idetape_block_ops = {
+static const struct block_device_operations idetape_block_ops = {
.owner = THIS_MODULE,
.open = idetape_open,
.release = idetape_release,
struct gendisk *g;
int minor;
- if (!strstr("ide-tape", drive->driver_req))
+ ide_debug_log(IDE_DBG_FUNC, "enter");
+
+ if (!strstr(DRV_NAME, drive->driver_req))
goto failed;
if (drive->media != ide_tape)
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff