mirror of https://gitee.com/openkylin/linux.git
ide-tape: struct idetape_tape_t: shorten member names v2
Shorten some member names not too aggressively since this driver might be gone anyway soon. Bart: - minor fixes Signed-off-by: Borislav Petkov <petkovbb@gmail.com> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
This commit is contained in:
Borislav Petkov
Bartlomiej Zolnierkiewicz
parent
41f81d545b
commit
54bb2074ce
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@ -299,10 +299,8 @@ typedef struct ide_tape_obj {
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/* Timer used to poll for dsc */
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struct timer_list dsc_timer;
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/* Read/Write dsc polling frequency */
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unsigned long best_dsc_rw_frequency;
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/* The current polling frequency */
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unsigned long dsc_polling_frequency;
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/* Maximum waiting time */
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unsigned long best_dsc_rw_freq;
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unsigned long dsc_poll_freq;
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unsigned long dsc_timeout;
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/*
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@ -310,7 +308,7 @@ typedef struct ide_tape_obj {
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*/
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u8 partition;
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/* Current block */
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unsigned int first_frame_position;
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unsigned int first_frame;
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/*
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* Last error information
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@ -326,11 +324,8 @@ typedef struct ide_tape_obj {
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/* Current character device data transfer direction */
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u8 chrdev_dir;
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/*
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* Device information
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*/
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/* Usually 512 or 1024 bytes */
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unsigned short tape_block_size;
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/* tape block size, usually 512 or 1024 bytes */
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unsigned short blk_size;
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int user_bs_factor;
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/* Copy of the tape's Capabilities and Mechanical Page */
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@ -349,8 +344,8 @@ typedef struct ide_tape_obj {
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* The data buffer size is chosen based on the tape's
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* recommendation.
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*/
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/* Pointer to the request which is waiting in the device request queue */
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struct request *active_data_request;
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/* Ptr to the request which is waiting in the device request queue */
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struct request *active_data_rq;
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/* Data buffer size (chosen based on the tape's recommendation */
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int stage_size;
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idetape_stage_t *merge_stage;
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@ -388,7 +383,7 @@ typedef struct ide_tape_obj {
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/* Status/Action flags: long for set_bit */
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unsigned long flags;
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/* protects the ide-tape queue */
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spinlock_t spinlock;
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spinlock_t lock;
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/*
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* Measures average tape speed
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@ -750,7 +745,7 @@ static void idetape_analyze_error(ide_drive_t *drive, u8 *sense)
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/* Correct pc->actually_transferred by asking the tape. */
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if (test_bit(PC_DMA_ERROR, &pc->flags)) {
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pc->actually_transferred = pc->request_transfer -
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tape->tape_block_size *
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tape->blk_size *
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be32_to_cpu(get_unaligned((u32 *)&sense[3]));
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idetape_update_buffers(pc);
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}
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@ -809,7 +804,7 @@ static void idetape_activate_next_stage(ide_drive_t *drive)
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rq->rq_disk = tape->disk;
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rq->buffer = NULL;
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rq->special = (void *)stage->bh;
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tape->active_data_request = rq;
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tape->active_data_rq = rq;
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tape->active_stage = stage;
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tape->next_stage = stage->next;
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}
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@ -951,13 +946,13 @@ static int idetape_end_request(ide_drive_t *drive, int uptodate, int nr_sects)
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return 0;
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}
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spin_lock_irqsave(&tape->spinlock, flags);
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spin_lock_irqsave(&tape->lock, flags);
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/* The request was a pipelined data transfer request */
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if (tape->active_data_request == rq) {
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if (tape->active_data_rq == rq) {
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active_stage = tape->active_stage;
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tape->active_stage = NULL;
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tape->active_data_request = NULL;
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tape->active_data_rq = NULL;
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tape->nr_pending_stages--;
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if (rq->cmd[0] & REQ_IDETAPE_WRITE) {
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remove_stage = 1;
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@ -978,7 +973,8 @@ static int idetape_end_request(ide_drive_t *drive, int uptodate, int nr_sects)
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/*
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* Insert the next request into the request queue.
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*/
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(void) ide_do_drive_cmd(drive, tape->active_data_request, ide_end);
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(void)ide_do_drive_cmd(drive, tape->active_data_rq,
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ide_end);
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} else if (!error) {
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idetape_increase_max_pipeline_stages(drive);
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}
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@ -990,9 +986,9 @@ static int idetape_end_request(ide_drive_t *drive, int uptodate, int nr_sects)
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if (remove_stage)
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idetape_remove_stage_head(drive);
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if (tape->active_data_request == NULL)
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if (tape->active_data_rq == NULL)
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clear_bit(IDETAPE_PIPELINE_ACTIVE, &tape->flags);
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spin_unlock_irqrestore(&tape->spinlock, flags);
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spin_unlock_irqrestore(&tape->lock, flags);
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return 0;
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}
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@ -1089,7 +1085,7 @@ static void idetape_postpone_request (ide_drive_t *drive)
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debug_log(DBG_PROCS, "Enter %s\n", __func__);
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tape->postponed_rq = HWGROUP(drive)->rq;
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ide_stall_queue(drive, tape->dsc_polling_frequency);
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ide_stall_queue(drive, tape->dsc_poll_freq);
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}
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typedef void idetape_io_buf(ide_drive_t *, idetape_pc_t *, unsigned int);
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@ -1190,7 +1186,7 @@ static ide_startstop_t idetape_pc_intr(ide_drive_t *drive)
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(stat & SEEK_STAT) == 0) {
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/* Media access command */
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tape->dsc_polling_start = jiffies;
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tape->dsc_polling_frequency = IDETAPE_DSC_MA_FAST;
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tape->dsc_poll_freq = IDETAPE_DSC_MA_FAST;
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tape->dsc_timeout = jiffies + IDETAPE_DSC_MA_TIMEOUT;
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/* Allow ide.c to handle other requests */
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idetape_postpone_request(drive);
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@ -1543,10 +1539,10 @@ static ide_startstop_t idetape_rw_callback (ide_drive_t *drive)
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{
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idetape_tape_t *tape = drive->driver_data;
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struct request *rq = HWGROUP(drive)->rq;
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int blocks = tape->pc->actually_transferred / tape->tape_block_size;
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int blocks = tape->pc->actually_transferred / tape->blk_size;
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tape->avg_size += blocks * tape->tape_block_size;
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tape->insert_size += blocks * tape->tape_block_size;
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tape->avg_size += blocks * tape->blk_size;
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tape->insert_size += blocks * tape->blk_size;
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if (tape->insert_size > 1024 * 1024)
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tape->measure_insert_time = 1;
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if (tape->measure_insert_time) {
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@ -1563,7 +1559,7 @@ static ide_startstop_t idetape_rw_callback (ide_drive_t *drive)
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}
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debug_log(DBG_PROCS, "Enter %s\n", __func__);
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tape->first_frame_position += blocks;
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tape->first_frame += blocks;
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rq->current_nr_sectors -= blocks;
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if (!tape->pc->error)
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@ -1583,7 +1579,8 @@ static void idetape_create_read_cmd(idetape_tape_t *tape, idetape_pc_t *pc, unsi
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pc->bh = bh;
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atomic_set(&bh->b_count, 0);
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pc->buffer = NULL;
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pc->request_transfer = pc->buffer_size = length * tape->tape_block_size;
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pc->buffer_size = length * tape->blk_size;
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pc->request_transfer = pc->buffer_size;
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if (pc->request_transfer == tape->stage_size)
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set_bit(PC_DMA_RECOMMENDED, &pc->flags);
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}
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@ -1621,7 +1618,8 @@ static void idetape_create_write_cmd(idetape_tape_t *tape, idetape_pc_t *pc, uns
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pc->b_data = bh->b_data;
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pc->b_count = atomic_read(&bh->b_count);
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pc->buffer = NULL;
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pc->request_transfer = pc->buffer_size = length * tape->tape_block_size;
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pc->buffer_size = length * tape->blk_size;
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pc->request_transfer = pc->buffer_size;
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if (pc->request_transfer == tape->stage_size)
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set_bit(PC_DMA_RECOMMENDED, &pc->flags);
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}
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@ -1689,7 +1687,7 @@ static ide_startstop_t idetape_do_request(ide_drive_t *drive,
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(stat & SEEK_STAT) == 0) {
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if (postponed_rq == NULL) {
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tape->dsc_polling_start = jiffies;
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tape->dsc_polling_frequency = tape->best_dsc_rw_frequency;
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tape->dsc_poll_freq = tape->best_dsc_rw_freq;
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tape->dsc_timeout = jiffies + IDETAPE_DSC_RW_TIMEOUT;
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} else if (time_after(jiffies, tape->dsc_timeout)) {
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printk(KERN_ERR "ide-tape: %s: DSC timeout\n",
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@ -1701,7 +1699,7 @@ static ide_startstop_t idetape_do_request(ide_drive_t *drive,
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return ide_do_reset(drive);
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}
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} else if (time_after(jiffies, tape->dsc_polling_start + IDETAPE_DSC_MA_THRESHOLD))
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tape->dsc_polling_frequency = IDETAPE_DSC_MA_SLOW;
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tape->dsc_poll_freq = IDETAPE_DSC_MA_SLOW;
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idetape_postpone_request(drive);
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return ide_stopped;
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}
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@ -1748,7 +1746,7 @@ static inline int idetape_pipeline_active (idetape_tape_t *tape)
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int rc1, rc2;
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rc1 = test_bit(IDETAPE_PIPELINE_ACTIVE, &tape->flags);
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rc2 = (tape->active_data_request != NULL);
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rc2 = (tape->active_data_rq != NULL);
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return rc1;
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}
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@ -1930,7 +1928,7 @@ static void idetape_add_stage_tail (ide_drive_t *drive,idetape_stage_t *stage)
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debug_log(DBG_PROCS, "Enter %s\n", __func__);
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spin_lock_irqsave(&tape->spinlock, flags);
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spin_lock_irqsave(&tape->lock, flags);
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stage->next = NULL;
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if (tape->last_stage != NULL)
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tape->last_stage->next=stage;
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@ -1941,7 +1939,7 @@ static void idetape_add_stage_tail (ide_drive_t *drive,idetape_stage_t *stage)
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tape->next_stage = tape->last_stage;
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tape->nr_stages++;
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tape->nr_pending_stages++;
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spin_unlock_irqrestore(&tape->spinlock, flags);
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spin_unlock_irqrestore(&tape->lock, flags);
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}
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/*
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@ -1962,10 +1960,10 @@ static void idetape_wait_for_request (ide_drive_t *drive, struct request *rq)
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}
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rq->end_io_data = &wait;
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rq->end_io = blk_end_sync_rq;
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spin_unlock_irq(&tape->spinlock);
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spin_unlock_irq(&tape->lock);
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wait_for_completion(&wait);
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/* The stage and its struct request have been deallocated */
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spin_lock_irq(&tape->spinlock);
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spin_lock_irq(&tape->lock);
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}
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static ide_startstop_t idetape_read_position_callback(ide_drive_t *drive)
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@ -1991,7 +1989,7 @@ static ide_startstop_t idetape_read_position_callback(ide_drive_t *drive)
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be32_to_cpu(*(u32 *)&readpos[4]));
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tape->partition = readpos[1];
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tape->first_frame_position =
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tape->first_frame =
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be32_to_cpu(*(u32 *)&readpos[4]);
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set_bit(IDETAPE_ADDRESS_VALID, &tape->flags);
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idetape_end_request(drive, 1, 0);
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@ -2133,7 +2131,7 @@ static int idetape_read_position (ide_drive_t *drive)
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idetape_create_read_position_cmd(&pc);
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if (idetape_queue_pc_tail(drive, &pc))
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return -1;
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position = tape->first_frame_position;
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position = tape->first_frame;
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return position;
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}
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@ -2173,7 +2171,7 @@ static int __idetape_discard_read_pipeline (ide_drive_t *drive)
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return 0;
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/* Remove merge stage. */
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cnt = tape->merge_stage_size / tape->tape_block_size;
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cnt = tape->merge_stage_size / tape->blk_size;
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if (test_and_clear_bit(IDETAPE_FILEMARK, &tape->flags))
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++cnt; /* Filemarks count as 1 sector */
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tape->merge_stage_size = 0;
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@ -2190,11 +2188,11 @@ static int __idetape_discard_read_pipeline (ide_drive_t *drive)
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if (tape->first_stage == NULL)
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return 0;
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spin_lock_irqsave(&tape->spinlock, flags);
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spin_lock_irqsave(&tape->lock, flags);
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tape->next_stage = NULL;
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if (idetape_pipeline_active(tape))
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idetape_wait_for_request(drive, tape->active_data_request);
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spin_unlock_irqrestore(&tape->spinlock, flags);
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idetape_wait_for_request(drive, tape->active_data_rq);
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spin_unlock_irqrestore(&tape->lock, flags);
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while (tape->first_stage != NULL) {
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struct request *rq_ptr = &tape->first_stage->rq;
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@ -2273,7 +2271,7 @@ static int idetape_queue_rw_tail(ide_drive_t *drive, int cmd, int blocks, struct
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idetape_init_rq(&rq, cmd);
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rq.rq_disk = tape->disk;
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rq.special = (void *)bh;
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rq.sector = tape->first_frame_position;
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rq.sector = tape->first_frame;
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rq.nr_sectors = rq.current_nr_sectors = blocks;
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(void) ide_do_drive_cmd(drive, &rq, ide_wait);
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@ -2284,7 +2282,7 @@ static int idetape_queue_rw_tail(ide_drive_t *drive, int cmd, int blocks, struct
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idetape_init_merge_stage(tape);
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if (rq.errors == IDETAPE_ERROR_GENERAL)
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return -EIO;
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return (tape->tape_block_size * (blocks-rq.current_nr_sectors));
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return (tape->blk_size * (blocks-rq.current_nr_sectors));
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}
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/*
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@ -2300,7 +2298,7 @@ static void idetape_insert_pipeline_into_queue (ide_drive_t *drive)
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if (!idetape_pipeline_active(tape)) {
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set_bit(IDETAPE_PIPELINE_ACTIVE, &tape->flags);
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idetape_activate_next_stage(drive);
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(void) ide_do_drive_cmd(drive, tape->active_data_request, ide_end);
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(void) ide_do_drive_cmd(drive, tape->active_data_rq, ide_end);
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}
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}
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@ -2346,10 +2344,10 @@ static void idetape_wait_first_stage (ide_drive_t *drive)
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if (tape->first_stage == NULL)
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return;
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spin_lock_irqsave(&tape->spinlock, flags);
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spin_lock_irqsave(&tape->lock, flags);
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if (tape->active_stage == tape->first_stage)
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idetape_wait_for_request(drive, tape->active_data_request);
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spin_unlock_irqrestore(&tape->spinlock, flags);
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idetape_wait_for_request(drive, tape->active_data_rq);
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spin_unlock_irqrestore(&tape->lock, flags);
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}
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/*
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@ -2377,12 +2375,12 @@ static int idetape_add_chrdev_write_request (ide_drive_t *drive, int blocks)
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* Pay special attention to possible race conditions.
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*/
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while ((new_stage = idetape_kmalloc_stage(tape)) == NULL) {
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spin_lock_irqsave(&tape->spinlock, flags);
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spin_lock_irqsave(&tape->lock, flags);
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if (idetape_pipeline_active(tape)) {
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idetape_wait_for_request(drive, tape->active_data_request);
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spin_unlock_irqrestore(&tape->spinlock, flags);
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idetape_wait_for_request(drive, tape->active_data_rq);
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spin_unlock_irqrestore(&tape->lock, flags);
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} else {
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spin_unlock_irqrestore(&tape->spinlock, flags);
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spin_unlock_irqrestore(&tape->lock, flags);
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idetape_insert_pipeline_into_queue(drive);
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if (idetape_pipeline_active(tape))
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continue;
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@ -2396,7 +2394,7 @@ static int idetape_add_chrdev_write_request (ide_drive_t *drive, int blocks)
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rq = &new_stage->rq;
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idetape_init_rq(rq, REQ_IDETAPE_WRITE);
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/* Doesn't actually matter - We always assume sequential access */
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rq->sector = tape->first_frame_position;
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rq->sector = tape->first_frame;
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rq->nr_sectors = rq->current_nr_sectors = blocks;
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idetape_switch_buffers(tape, new_stage);
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@ -2413,7 +2411,9 @@ static int idetape_add_chrdev_write_request (ide_drive_t *drive, int blocks)
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*/
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if (!idetape_pipeline_active(tape)) {
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if (tape->nr_stages >= tape->max_stages * 9 / 10 ||
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tape->nr_stages >= tape->max_stages - tape->uncontrolled_pipeline_head_speed * 3 * 1024 / tape->tape_block_size) {
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tape->nr_stages >= tape->max_stages -
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tape->uncontrolled_pipeline_head_speed * 3 * 1024 /
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tape->blk_size) {
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tape->measure_insert_time = 1;
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tape->insert_time = jiffies;
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tape->insert_size = 0;
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@ -2438,10 +2438,10 @@ static void idetape_wait_for_pipeline (ide_drive_t *drive)
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while (tape->next_stage || idetape_pipeline_active(tape)) {
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idetape_insert_pipeline_into_queue(drive);
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spin_lock_irqsave(&tape->spinlock, flags);
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spin_lock_irqsave(&tape->lock, flags);
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if (idetape_pipeline_active(tape))
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idetape_wait_for_request(drive, tape->active_data_request);
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spin_unlock_irqrestore(&tape->spinlock, flags);
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||||
idetape_wait_for_request(drive, tape->active_data_rq);
|
||||
spin_unlock_irqrestore(&tape->lock, flags);
|
||||
}
|
||||
}
|
||||
|
||||
|
|
@ -2460,12 +2460,13 @@ static void idetape_empty_write_pipeline (ide_drive_t *drive)
|
|||
tape->merge_stage_size = tape->stage_size;
|
||||
}
|
||||
if (tape->merge_stage_size) {
|
||||
blocks = tape->merge_stage_size / tape->tape_block_size;
|
||||
if (tape->merge_stage_size % tape->tape_block_size) {
|
||||
blocks = tape->merge_stage_size / tape->blk_size;
|
||||
if (tape->merge_stage_size % tape->blk_size) {
|
||||
unsigned int i;
|
||||
|
||||
blocks++;
|
||||
i = tape->tape_block_size - tape->merge_stage_size % tape->tape_block_size;
|
||||
i = tape->blk_size - tape->merge_stage_size %
|
||||
tape->blk_size;
|
||||
bh = tape->bh->b_reqnext;
|
||||
while (bh) {
|
||||
atomic_set(&bh->b_count, 0);
|
||||
|
|
@ -2571,7 +2572,7 @@ static int idetape_initiate_read (ide_drive_t *drive, int max_stages)
|
|||
if (tape->restart_speed_control_req)
|
||||
idetape_restart_speed_control(drive);
|
||||
idetape_init_rq(&rq, REQ_IDETAPE_READ);
|
||||
rq.sector = tape->first_frame_position;
|
||||
rq.sector = tape->first_frame;
|
||||
rq.nr_sectors = rq.current_nr_sectors = blocks;
|
||||
if (!test_bit(IDETAPE_PIPELINE_ERROR, &tape->flags) &&
|
||||
tape->nr_stages < max_stages) {
|
||||
|
|
@ -2624,11 +2625,13 @@ static int idetape_add_chrdev_read_request (ide_drive_t *drive,int blocks)
|
|||
if (tape->first_stage == NULL) {
|
||||
if (test_bit(IDETAPE_PIPELINE_ERROR, &tape->flags))
|
||||
return 0;
|
||||
return idetape_queue_rw_tail(drive, REQ_IDETAPE_READ, blocks, tape->merge_stage->bh);
|
||||
return idetape_queue_rw_tail(drive, REQ_IDETAPE_READ, blocks,
|
||||
tape->merge_stage->bh);
|
||||
}
|
||||
idetape_wait_first_stage(drive);
|
||||
rq_ptr = &tape->first_stage->rq;
|
||||
bytes_read = tape->tape_block_size * (rq_ptr->nr_sectors - rq_ptr->current_nr_sectors);
|
||||
bytes_read = tape->blk_size * (rq_ptr->nr_sectors -
|
||||
rq_ptr->current_nr_sectors);
|
||||
rq_ptr->nr_sectors = rq_ptr->current_nr_sectors = 0;
|
||||
|
||||
|
||||
|
|
@ -2638,15 +2641,15 @@ static int idetape_add_chrdev_read_request (ide_drive_t *drive,int blocks)
|
|||
idetape_switch_buffers(tape, tape->first_stage);
|
||||
if (rq_ptr->errors == IDETAPE_ERROR_FILEMARK)
|
||||
set_bit(IDETAPE_FILEMARK, &tape->flags);
|
||||
spin_lock_irqsave(&tape->spinlock, flags);
|
||||
spin_lock_irqsave(&tape->lock, flags);
|
||||
idetape_remove_stage_head(drive);
|
||||
spin_unlock_irqrestore(&tape->spinlock, flags);
|
||||
spin_unlock_irqrestore(&tape->lock, flags);
|
||||
tape->pipeline_head++;
|
||||
idetape_calculate_speeds(drive);
|
||||
}
|
||||
if (bytes_read > blocks * tape->tape_block_size) {
|
||||
if (bytes_read > blocks * tape->blk_size) {
|
||||
printk(KERN_ERR "ide-tape: bug: trying to return more bytes than requested\n");
|
||||
bytes_read = blocks * tape->tape_block_size;
|
||||
bytes_read = blocks * tape->blk_size;
|
||||
}
|
||||
return (bytes_read);
|
||||
}
|
||||
|
|
@ -2663,7 +2666,7 @@ static void idetape_pad_zeros (ide_drive_t *drive, int bcount)
|
|||
bh = tape->merge_stage->bh;
|
||||
count = min(tape->stage_size, bcount);
|
||||
bcount -= count;
|
||||
blocks = count / tape->tape_block_size;
|
||||
blocks = count / tape->blk_size;
|
||||
while (count) {
|
||||
atomic_set(&bh->b_count, min(count, (unsigned int)bh->b_size));
|
||||
memset(bh->b_data, 0, atomic_read(&bh->b_count));
|
||||
|
|
@ -2685,9 +2688,10 @@ static int idetape_pipeline_size (ide_drive_t *drive)
|
|||
stage = tape->first_stage;
|
||||
while (stage != NULL) {
|
||||
rq = &stage->rq;
|
||||
size += tape->tape_block_size * (rq->nr_sectors-rq->current_nr_sectors);
|
||||
size += tape->blk_size * (rq->nr_sectors -
|
||||
rq->current_nr_sectors);
|
||||
if (rq->errors == IDETAPE_ERROR_FILEMARK)
|
||||
size += tape->tape_block_size;
|
||||
size += tape->blk_size;
|
||||
stage = stage->next;
|
||||
}
|
||||
size += tape->merge_stage_size;
|
||||
|
|
@ -2744,11 +2748,11 @@ static int idetape_blkdev_ioctl(ide_drive_t *drive, unsigned int cmd, unsigned l
|
|||
case 0x0340:
|
||||
if (copy_from_user(&config, argp, sizeof(config)))
|
||||
return -EFAULT;
|
||||
tape->best_dsc_rw_frequency = config.dsc_rw_frequency;
|
||||
tape->best_dsc_rw_freq = config.dsc_rw_frequency;
|
||||
tape->max_stages = config.nr_stages;
|
||||
break;
|
||||
case 0x0350:
|
||||
config.dsc_rw_frequency = (int) tape->best_dsc_rw_frequency;
|
||||
config.dsc_rw_frequency = (int) tape->best_dsc_rw_freq;
|
||||
config.nr_stages = tape->max_stages;
|
||||
if (copy_to_user(argp, &config, sizeof(config)))
|
||||
return -EFAULT;
|
||||
|
|
@ -2798,7 +2802,7 @@ static int idetape_space_over_filemarks (ide_drive_t *drive,short mt_op,int mt_c
|
|||
set_bit(IDETAPE_FILEMARK, &tape->flags);
|
||||
return 0;
|
||||
}
|
||||
spin_lock_irqsave(&tape->spinlock, flags);
|
||||
spin_lock_irqsave(&tape->lock, flags);
|
||||
if (tape->first_stage == tape->active_stage) {
|
||||
/*
|
||||
* We have reached the active stage in the read pipeline.
|
||||
|
|
@ -2810,11 +2814,11 @@ static int idetape_space_over_filemarks (ide_drive_t *drive,short mt_op,int mt_c
|
|||
* __idetape_discard_read_pipeline(), for example.
|
||||
*/
|
||||
tape->next_stage = NULL;
|
||||
spin_unlock_irqrestore(&tape->spinlock, flags);
|
||||
spin_unlock_irqrestore(&tape->lock, flags);
|
||||
idetape_wait_first_stage(drive);
|
||||
tape->next_stage = tape->first_stage->next;
|
||||
} else
|
||||
spin_unlock_irqrestore(&tape->spinlock, flags);
|
||||
spin_unlock_irqrestore(&tape->lock, flags);
|
||||
if (tape->first_stage->rq.errors == IDETAPE_ERROR_FILEMARK)
|
||||
++count;
|
||||
idetape_remove_stage_head(drive);
|
||||
|
|
@ -2876,9 +2880,9 @@ static ssize_t idetape_chrdev_read (struct file *file, char __user *buf,
|
|||
|
||||
if (tape->chrdev_dir != IDETAPE_DIR_READ) {
|
||||
if (test_bit(IDETAPE_DETECT_BS, &tape->flags))
|
||||
if (count > tape->tape_block_size &&
|
||||
(count % tape->tape_block_size) == 0)
|
||||
tape->user_bs_factor = count / tape->tape_block_size;
|
||||
if (count > tape->blk_size &&
|
||||
(count % tape->blk_size) == 0)
|
||||
tape->user_bs_factor = count / tape->blk_size;
|
||||
}
|
||||
if ((rc = idetape_initiate_read(drive, tape->max_stages)) < 0)
|
||||
return rc;
|
||||
|
|
@ -3115,9 +3119,11 @@ static int idetape_mtioctop(ide_drive_t *drive, short mt_op, int mt_count)
|
|||
return (idetape_queue_pc_tail(drive, &pc));
|
||||
case MTSETBLK:
|
||||
if (mt_count) {
|
||||
if (mt_count < tape->tape_block_size || mt_count % tape->tape_block_size)
|
||||
if (mt_count < tape->blk_size ||
|
||||
mt_count % tape->blk_size)
|
||||
return -EIO;
|
||||
tape->user_bs_factor = mt_count / tape->tape_block_size;
|
||||
tape->user_bs_factor = mt_count /
|
||||
tape->blk_size;
|
||||
clear_bit(IDETAPE_DETECT_BS, &tape->flags);
|
||||
} else
|
||||
set_bit(IDETAPE_DETECT_BS, &tape->flags);
|
||||
|
|
@ -3164,7 +3170,7 @@ static int idetape_chrdev_ioctl(struct inode *inode, struct file *file,
|
|||
struct mtop mtop;
|
||||
struct mtget mtget;
|
||||
struct mtpos mtpos;
|
||||
int block_offset = 0, position = tape->first_frame_position;
|
||||
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);
|
||||
|
|
@ -3175,7 +3181,8 @@ static int idetape_chrdev_ioctl(struct inode *inode, struct file *file,
|
|||
idetape_flush_tape_buffers(drive);
|
||||
}
|
||||
if (cmd == MTIOCGET || cmd == MTIOCPOS) {
|
||||
block_offset = idetape_pipeline_size(drive) / (tape->tape_block_size * tape->user_bs_factor);
|
||||
block_offset = idetape_pipeline_size(drive) /
|
||||
(tape->blk_size * tape->user_bs_factor);
|
||||
if ((position = idetape_read_position(drive)) < 0)
|
||||
return -EIO;
|
||||
}
|
||||
|
|
@ -3188,7 +3195,10 @@ static int idetape_chrdev_ioctl(struct inode *inode, struct file *file,
|
|||
memset(&mtget, 0, sizeof (struct mtget));
|
||||
mtget.mt_type = MT_ISSCSI2;
|
||||
mtget.mt_blkno = position / tape->user_bs_factor - block_offset;
|
||||
mtget.mt_dsreg = ((tape->tape_block_size * tape->user_bs_factor) << MT_ST_BLKSIZE_SHIFT) & MT_ST_BLKSIZE_MASK;
|
||||
mtget.mt_dsreg =
|
||||
((tape->blk_size * tape->user_bs_factor)
|
||||
<< MT_ST_BLKSIZE_SHIFT) & MT_ST_BLKSIZE_MASK;
|
||||
|
||||
if (tape->drv_write_prot) {
|
||||
mtget.mt_gstat |= GMT_WR_PROT(0xffffffff);
|
||||
}
|
||||
|
|
@ -3219,14 +3229,14 @@ static void ide_tape_get_bsize_from_bdesc(ide_drive_t *drive)
|
|||
idetape_create_mode_sense_cmd(&pc, IDETAPE_BLOCK_DESCRIPTOR);
|
||||
if (idetape_queue_pc_tail(drive, &pc)) {
|
||||
printk(KERN_ERR "ide-tape: Can't get block descriptor\n");
|
||||
if (tape->tape_block_size == 0) {
|
||||
if (tape->blk_size == 0) {
|
||||
printk(KERN_WARNING "ide-tape: Cannot deal with zero "
|
||||
"block size, assuming 32k\n");
|
||||
tape->tape_block_size = 32768;
|
||||
tape->blk_size = 32768;
|
||||
}
|
||||
return;
|
||||
}
|
||||
tape->tape_block_size = (pc.buffer[4 + 5] << 16) +
|
||||
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;
|
||||
|
|
@ -3328,7 +3338,8 @@ static void idetape_write_release (ide_drive_t *drive, unsigned int minor)
|
|||
idetape_empty_write_pipeline(drive);
|
||||
tape->merge_stage = __idetape_kmalloc_stage(tape, 1, 0);
|
||||
if (tape->merge_stage != NULL) {
|
||||
idetape_pad_zeros(drive, tape->tape_block_size * (tape->user_bs_factor - 1));
|
||||
idetape_pad_zeros(drive, tape->blk_size *
|
||||
(tape->user_bs_factor - 1));
|
||||
__idetape_kfree_stage(tape->merge_stage);
|
||||
tape->merge_stage = NULL;
|
||||
}
|
||||
|
|
@ -3456,7 +3467,7 @@ static void idetape_get_mode_sense_results (ide_drive_t *drive)
|
|||
if (idetape_queue_pc_tail(drive, &pc)) {
|
||||
printk(KERN_ERR "ide-tape: Can't get tape parameters - assuming"
|
||||
" some default values\n");
|
||||
tape->tape_block_size = 512;
|
||||
tape->blk_size = 512;
|
||||
put_unaligned(52, (u16 *)&tape->caps[12]);
|
||||
put_unaligned(540, (u16 *)&tape->caps[14]);
|
||||
put_unaligned(6*52, (u16 *)&tape->caps[16]);
|
||||
|
|
@ -3486,9 +3497,9 @@ static void idetape_get_mode_sense_results (ide_drive_t *drive)
|
|||
|
||||
memcpy(&tape->caps, caps, 20);
|
||||
if (caps[7] & 0x02)
|
||||
tape->tape_block_size = 512;
|
||||
tape->blk_size = 512;
|
||||
else if (caps[7] & 0x04)
|
||||
tape->tape_block_size = 1024;
|
||||
tape->blk_size = 1024;
|
||||
}
|
||||
|
||||
#ifdef CONFIG_IDE_PROC_FS
|
||||
|
|
@ -3508,8 +3519,11 @@ static void idetape_add_settings (ide_drive_t *drive)
|
|||
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, (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, "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, "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_freq,
|
||||
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);
|
||||
|
|
@ -3542,7 +3556,7 @@ static void idetape_setup (ide_drive_t *drive, idetape_tape_t *tape, int minor)
|
|||
struct sysinfo si;
|
||||
u16 *ctl = (u16 *)&tape->caps[12];
|
||||
|
||||
spin_lock_init(&tape->spinlock);
|
||||
spin_lock_init(&tape->lock);
|
||||
drive->dsc_overlap = 1;
|
||||
if (drive->hwif->host_flags & IDE_HFLAG_NO_DSC) {
|
||||
printk(KERN_INFO "ide-tape: %s: disabling DSC overlap\n",
|
||||
|
|
@ -3570,11 +3584,11 @@ 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->tape_block_size;
|
||||
tape->stage_size = *ctl * tape->blk_size;
|
||||
while (tape->stage_size > 0xffff) {
|
||||
printk(KERN_NOTICE "ide-tape: decreasing stage size\n");
|
||||
*ctl /= 2;
|
||||
tape->stage_size = *ctl * tape->tape_block_size;
|
||||
tape->stage_size = *ctl * tape->blk_size;
|
||||
}
|
||||
stage_size = tape->stage_size;
|
||||
tape->pages_per_stage = stage_size / PAGE_SIZE;
|
||||
|
|
@ -3613,14 +3627,16 @@ static void idetape_setup (ide_drive_t *drive, idetape_tape_t *tape, int minor)
|
|||
* Ensure that the number we got makes sense; limit
|
||||
* it within IDETAPE_DSC_RW_MIN and IDETAPE_DSC_RW_MAX.
|
||||
*/
|
||||
tape->best_dsc_rw_frequency = max_t(unsigned long, min_t(unsigned long, t, IDETAPE_DSC_RW_MAX), IDETAPE_DSC_RW_MIN);
|
||||
tape->best_dsc_rw_freq = max_t(unsigned long,
|
||||
min_t(unsigned long, t, IDETAPE_DSC_RW_MAX),
|
||||
IDETAPE_DSC_RW_MIN);
|
||||
printk(KERN_INFO "ide-tape: %s <-> %s: %dKBps, %d*%dkB buffer, "
|
||||
"%dkB pipeline, %lums tDSC%s\n",
|
||||
drive->name, tape->name, *(u16 *)&tape->caps[14],
|
||||
(*(u16 *)&tape->caps[16] * 512) / tape->stage_size,
|
||||
tape->stage_size / 1024,
|
||||
tape->max_stages * tape->stage_size / 1024,
|
||||
tape->best_dsc_rw_frequency * 1000 / HZ,
|
||||
tape->best_dsc_rw_freq * 1000 / HZ,
|
||||
drive->using_dma ? ", DMA":"");
|
||||
|
||||
idetape_add_settings(drive);
|
||||
|
|
|
|||
Loading…
Reference in New Issue