/*
- * linux/drivers/ide/ide-tape.c Version 1.19 Nov, 2003
- *
* Copyright (C) 1995 - 1999 Gadi Oxman <gadio@netvision.net.il>
*
* $Header$
* 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
*/
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 */
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;
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, "
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, ",
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 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;
}
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);
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 idetape_id_gcw gcw;
struct hd_driveid *id = drive->id;
-#if IDETAPE_DEBUG_INFO
- unsigned short mask,i;
-#endif /* IDETAPE_DEBUG_INFO */
if (drive->id_read == 0)
return 1;
case 1: printk("16 bytes\n");break;
default: printk("Reserved\n");break;
}
- printk(KERN_INFO "ide-tape: Model: %.40s\n",id->model);
- printk(KERN_INFO "ide-tape: Firmware Revision: %.8s\n",id->fw_rev);
- printk(KERN_INFO "ide-tape: Serial Number: %.20s\n",id->serial_no);
- printk(KERN_INFO "ide-tape: Write buffer size: %d bytes\n",id->buf_size*512);
- printk(KERN_INFO "ide-tape: DMA: %s",id->capability & 0x01 ? "Yes\n":"No\n");
- printk(KERN_INFO "ide-tape: LBA: %s",id->capability & 0x02 ? "Yes\n":"No\n");
- printk(KERN_INFO "ide-tape: IORDY can be disabled: %s",id->capability & 0x04 ? "Yes\n":"No\n");
- printk(KERN_INFO "ide-tape: IORDY supported: %s",id->capability & 0x08 ? "Yes\n":"Unknown\n");
- printk(KERN_INFO "ide-tape: ATAPI overlap supported: %s",id->capability & 0x20 ? "Yes\n":"No\n");
- printk(KERN_INFO "ide-tape: PIO Cycle Timing Category: %d\n",id->tPIO);
- printk(KERN_INFO "ide-tape: DMA Cycle Timing Category: %d\n",id->tDMA);
- printk(KERN_INFO "ide-tape: Single Word DMA supported modes: ");
- for (i=0,mask=1;i<8;i++,mask=mask << 1) {
- if (id->dma_1word & mask)
- printk("%d ",i);
- if (id->dma_1word & (mask << 8))
- printk("(active) ");
- }
- printk("\n");
- printk(KERN_INFO "ide-tape: Multi Word DMA supported modes: ");
- for (i=0,mask=1;i<8;i++,mask=mask << 1) {
- if (id->dma_mword & mask)
- printk("%d ",i);
- if (id->dma_mword & (mask << 8))
- printk("(active) ");
- }
- printk("\n");
- if (id->field_valid & 0x0002) {
- printk(KERN_INFO "ide-tape: Enhanced PIO Modes: %s\n",
- id->eide_pio_modes & 1 ? "Mode 3":"None");
- printk(KERN_INFO "ide-tape: Minimum Multi-word DMA cycle per word: ");
- if (id->eide_dma_min == 0)
- printk("Not supported\n");
- else
- printk("%d ns\n",id->eide_dma_min);
-
- printk(KERN_INFO "ide-tape: Manufacturer\'s Recommended Multi-word cycle: ");
- if (id->eide_dma_time == 0)
- printk("Not supported\n");
- else
- printk("%d ns\n",id->eide_dma_time);
-
- printk(KERN_INFO "ide-tape: Minimum PIO cycle without IORDY: ");
- if (id->eide_pio == 0)
- printk("Not supported\n");
- else
- printk("%d ns\n",id->eide_pio);
-
- printk(KERN_INFO "ide-tape: Minimum PIO cycle with IORDY: ");
- if (id->eide_pio_iordy == 0)
- printk("Not supported\n");
- else
- printk("%d ns\n",id->eide_pio_iordy);
-
- } else
- printk(KERN_INFO "ide-tape: According to the device, fields 64-70 are not valid.\n");
#endif /* IDETAPE_DEBUG_INFO */
/* Check that we can support this device */
spin_lock_init(&tape->spinlock);
drive->dsc_overlap = 1;
-#ifdef CONFIG_BLK_DEV_IDEPCI
- if (HWIF(drive)->pci_dev != NULL) {
- /*
- * These two ide-pci host adapters appear to need DSC overlap disabled.
- * This probably needs further analysis.
- */
- if ((HWIF(drive)->pci_dev->device == PCI_DEVICE_ID_ARTOP_ATP850UF) ||
- (HWIF(drive)->pci_dev->device == PCI_DEVICE_ID_TTI_HPT343)) {
- printk(KERN_INFO "ide-tape: %s: disabling DSC overlap\n", tape->name);
- drive->dsc_overlap = 0;
- }
+ if (drive->hwif->host_flags & IDE_HFLAG_NO_DSC) {
+ printk(KERN_INFO "ide-tape: %s: disabling DSC overlap\n",
+ tape->name);
+ drive->dsc_overlap = 0;
}
-#endif /* CONFIG_BLK_DEV_IDEPCI */
/* Seagate Travan drives do not support DSC overlap. */
if (strstr(drive->id->model, "Seagate STT3401"))
drive->dsc_overlap = 0;
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));
+ 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);
idetape_setup(drive, tape, minor);
- class_device_create(idetape_sysfs_class, NULL,
- MKDEV(IDETAPE_MAJOR, minor), &drive->gendev, "%s", tape->name);
- class_device_create(idetape_sysfs_class, NULL,
- MKDEV(IDETAPE_MAJOR, minor + 128), &drive->gendev, "n%s", tape->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->fops = &idetape_block_ops;
ide_register_region(g);
git.openpandora.org / pandora-kernel.git / blobdiff