#include <linux/scatterlist.h>
#include <linux/delay.h>
#include <linux/mutex.h>
+#include <linux/bitops.h>
#include <asm/io.h>
-#include <asm/bitops.h>
#include <asm/uaccess.h>
#include <scsi/scsi.h>
u8 *buffer; /* Data buffer */
u8 *current_position; /* Pointer into the above buffer */
struct scatterlist *sg; /* Scatter gather table */
+ unsigned int sg_cnt; /* Number of entries in sg */
int b_count; /* Bytes transferred from current entry */
struct scsi_cmnd *scsi_cmd; /* SCSI command */
void (*done)(struct scsi_cmnd *); /* Scsi completion routine */
*/
#define PC_DMA_IN_PROGRESS 0 /* 1 while DMA in progress */
#define PC_WRITING 1 /* Data direction */
-#define PC_TRANSFORM 2 /* transform SCSI commands */
#define PC_TIMEDOUT 3 /* command timed out */
#define PC_DMA_OK 4 /* Use DMA */
/*
* SCSI command transformation layer
*/
-#define IDESCSI_TRANSFORM 0 /* Enable/Disable transformation */
#define IDESCSI_SG_TRANSFORM 1 /* /dev/sg transformation */
/*
} idescsi_scsi_t;
static DEFINE_MUTEX(idescsi_ref_mutex);
+static int idescsi_nocd; /* Set by module param to skip cd */
#define ide_scsi_g(disk) \
container_of((disk)->private_data, struct ide_scsi_obj, driver)
char *buf;
while (bcount) {
- if (pc->sg - (struct scatterlist *) pc->scsi_cmd->request_buffer > pc->scsi_cmd->use_sg) {
- printk (KERN_ERR "ide-scsi: scatter gather table too small, discarding data\n");
- idescsi_discard_data (drive, bcount);
- return;
- }
count = min(pc->sg->length - pc->b_count, bcount);
- if (PageHighMem(pc->sg->page)) {
+ if (PageHighMem(sg_page(pc->sg))) {
unsigned long flags;
local_irq_save(flags);
- buf = kmap_atomic(pc->sg->page, KM_IRQ0) +
+ buf = kmap_atomic(sg_page(pc->sg), KM_IRQ0) +
pc->sg->offset;
drive->hwif->atapi_input_bytes(drive,
buf + pc->b_count, count);
kunmap_atomic(buf - pc->sg->offset, KM_IRQ0);
local_irq_restore(flags);
} else {
- buf = page_address(pc->sg->page) + pc->sg->offset;
+ buf = sg_virt(pc->sg);
drive->hwif->atapi_input_bytes(drive,
buf + pc->b_count, count);
}
bcount -= count; pc->b_count += count;
if (pc->b_count == pc->sg->length) {
- pc->sg++;
+ if (!--pc->sg_cnt)
+ break;
+ pc->sg = sg_next(pc->sg);
pc->b_count = 0;
}
}
+
+ if (bcount) {
+ printk (KERN_ERR "ide-scsi: scatter gather table too small, discarding data\n");
+ idescsi_discard_data (drive, bcount);
+ }
}
static void idescsi_output_buffers (ide_drive_t *drive, idescsi_pc_t *pc, unsigned int bcount)
char *buf;
while (bcount) {
- if (pc->sg - (struct scatterlist *) pc->scsi_cmd->request_buffer > pc->scsi_cmd->use_sg) {
- printk (KERN_ERR "ide-scsi: scatter gather table too small, padding with zeros\n");
- idescsi_output_zeros (drive, bcount);
- return;
- }
count = min(pc->sg->length - pc->b_count, bcount);
- if (PageHighMem(pc->sg->page)) {
+ if (PageHighMem(sg_page(pc->sg))) {
unsigned long flags;
local_irq_save(flags);
- buf = kmap_atomic(pc->sg->page, KM_IRQ0) +
+ buf = kmap_atomic(sg_page(pc->sg), KM_IRQ0) +
pc->sg->offset;
drive->hwif->atapi_output_bytes(drive,
buf + pc->b_count, count);
kunmap_atomic(buf - pc->sg->offset, KM_IRQ0);
local_irq_restore(flags);
} else {
- buf = page_address(pc->sg->page) + pc->sg->offset;
+ buf = sg_virt(pc->sg);
drive->hwif->atapi_output_bytes(drive,
buf + pc->b_count, count);
}
bcount -= count; pc->b_count += count;
if (pc->b_count == pc->sg->length) {
- pc->sg++;
+ if (!--pc->sg_cnt)
+ break;
+ pc->sg = sg_next(pc->sg);
pc->b_count = 0;
}
}
-}
-/*
- * Most of the SCSI commands are supported directly by ATAPI devices.
- * idescsi_transform_pc handles the few exceptions.
- */
-static inline void idescsi_transform_pc1 (ide_drive_t *drive, idescsi_pc_t *pc)
-{
- u8 *c = pc->c, *scsi_buf = pc->buffer, *sc = pc->scsi_cmd->cmnd;
- char *atapi_buf;
-
- if (!test_bit(PC_TRANSFORM, &pc->flags))
- return;
- if (drive->media == ide_cdrom || drive->media == ide_optical) {
- if (c[0] == READ_6 || c[0] == WRITE_6) {
- c[8] = c[4]; c[5] = c[3]; c[4] = c[2];
- c[3] = c[1] & 0x1f; c[2] = 0; c[1] &= 0xe0;
- c[0] += (READ_10 - READ_6);
- }
- if (c[0] == MODE_SENSE || c[0] == MODE_SELECT) {
- unsigned short new_len;
- if (!scsi_buf)
- return;
- if ((atapi_buf = kmalloc(pc->buffer_size + 4, GFP_ATOMIC)) == NULL)
- return;
- memset(atapi_buf, 0, pc->buffer_size + 4);
- memset (c, 0, 12);
- c[0] = sc[0] | 0x40;
- c[1] = sc[1];
- c[2] = sc[2];
- new_len = sc[4] + 4;
- c[8] = new_len;
- c[7] = new_len >> 8;
- c[9] = sc[5];
- if (c[0] == MODE_SELECT_10) {
- atapi_buf[1] = scsi_buf[0]; /* Mode data length */
- atapi_buf[2] = scsi_buf[1]; /* Medium type */
- atapi_buf[3] = scsi_buf[2]; /* Device specific parameter */
- atapi_buf[7] = scsi_buf[3]; /* Block descriptor length */
- memcpy(atapi_buf + 8, scsi_buf + 4, pc->buffer_size - 4);
- }
- pc->buffer = atapi_buf;
- pc->request_transfer += 4;
- pc->buffer_size += 4;
- }
+ if (bcount) {
+ printk (KERN_ERR "ide-scsi: scatter gather table too small, padding with zeros\n");
+ idescsi_output_zeros (drive, bcount);
}
}
-static inline void idescsi_transform_pc2 (ide_drive_t *drive, idescsi_pc_t *pc)
+static void ide_scsi_hex_dump(u8 *data, int len)
{
- u8 *atapi_buf = pc->buffer;
- u8 *sc = pc->scsi_cmd->cmnd;
- u8 *scsi_buf = pc->scsi_cmd->request_buffer;
-
- if (!test_bit(PC_TRANSFORM, &pc->flags))
- return;
- if (drive->media == ide_cdrom || drive->media == ide_optical) {
- if (pc->c[0] == MODE_SENSE_10 && sc[0] == MODE_SENSE) {
- scsi_buf[0] = atapi_buf[1]; /* Mode data length */
- scsi_buf[1] = atapi_buf[2]; /* Medium type */
- scsi_buf[2] = atapi_buf[3]; /* Device specific parameter */
- scsi_buf[3] = atapi_buf[7]; /* Block descriptor length */
- memcpy(scsi_buf + 4, atapi_buf + 8, pc->request_transfer - 8);
- }
- if (pc->c[0] == INQUIRY) {
- scsi_buf[2] |= 2; /* ansi_revision */
- scsi_buf[3] = (scsi_buf[3] & 0xf0) | 2; /* response data format */
- }
- }
- if (atapi_buf && atapi_buf != scsi_buf)
- kfree(atapi_buf);
-}
-
-static void hexdump(u8 *x, int len)
-{
- int i;
-
- printk("[ ");
- for (i = 0; i < len; i++)
- printk("%x ", x[i]);
- printk("]\n");
+ print_hex_dump(KERN_CONT, "", DUMP_PREFIX_NONE, 16, 1, data, len, 0);
}
static int idescsi_check_condition(ide_drive_t *drive, struct request *failed_command)
u8 *buf;
/* stuff a sense request in front of our current request */
- pc = kmalloc (sizeof (idescsi_pc_t), GFP_ATOMIC);
- rq = kmalloc (sizeof (struct request), GFP_ATOMIC);
- buf = kmalloc(SCSI_SENSE_BUFFERSIZE, GFP_ATOMIC);
- if (pc == NULL || rq == NULL || buf == NULL) {
+ pc = kzalloc(sizeof(idescsi_pc_t), GFP_ATOMIC);
+ rq = kmalloc(sizeof(struct request), GFP_ATOMIC);
+ buf = kzalloc(SCSI_SENSE_BUFFERSIZE, GFP_ATOMIC);
+ if (!pc || !rq || !buf) {
kfree(buf);
kfree(rq);
kfree(pc);
return -ENOMEM;
}
- memset (pc, 0, sizeof (idescsi_pc_t));
- memset (buf, 0, SCSI_SENSE_BUFFERSIZE);
ide_init_drive_cmd(rq);
rq->special = (char *) pc;
pc->rq = rq;
pc->buffer = buf;
pc->c[0] = REQUEST_SENSE;
pc->c[4] = pc->request_transfer = pc->buffer_size = SCSI_SENSE_BUFFERSIZE;
- rq->flags = REQ_SENSE;
+ rq->cmd_type = REQ_TYPE_SENSE;
pc->timeout = jiffies + WAIT_READY;
/* NOTE! Save the failed packet command in "rq->buffer" */
rq->buffer = (void *) failed_command->special;
pc->scsi_cmd = ((idescsi_pc_t *) failed_command->special)->scsi_cmd;
if (test_bit(IDESCSI_LOG_CMD, &scsi->log)) {
printk ("ide-scsi: %s: queue cmd = ", drive->name);
- hexdump(pc->c, 6);
+ ide_scsi_hex_dump(pc->c, 6);
}
rq->rq_disk = scsi->disk;
return ide_do_drive_cmd(drive, rq, ide_preempt);
idescsi_pc_t *pc = (idescsi_pc_t *) rq->special;
int log = test_bit(IDESCSI_LOG_CMD, &scsi->log);
struct Scsi_Host *host;
- u8 *scsi_buf;
int errors = rq->errors;
unsigned long flags;
- if (!(rq->flags & (REQ_SPECIAL|REQ_SENSE))) {
+ if (!blk_special_request(rq) && !blk_sense_request(rq)) {
ide_end_request(drive, uptodate, nrsecs);
return 0;
}
ide_end_drive_cmd (drive, 0, 0);
- if (rq->flags & REQ_SENSE) {
+ if (blk_sense_request(rq)) {
idescsi_pc_t *opc = (idescsi_pc_t *) rq->buffer;
if (log) {
printk ("ide-scsi: %s: wrap up check %lu, rst = ", drive->name, opc->scsi_cmd->serial_number);
- hexdump(pc->buffer,16);
+ ide_scsi_hex_dump(pc->buffer, 16);
}
memcpy((void *) opc->scsi_cmd->sense_buffer, pc->buffer, SCSI_SENSE_BUFFERSIZE);
kfree(pc->buffer);
pc->scsi_cmd->result = (CHECK_CONDITION << 1) | (DID_OK << 16);
} else {
pc->scsi_cmd->result = DID_OK << 16;
- idescsi_transform_pc2 (drive, pc);
- if (log) {
- printk ("ide-scsi: %s: suc %lu", drive->name, pc->scsi_cmd->serial_number);
- if (!test_bit(PC_WRITING, &pc->flags) && pc->actually_transferred && pc->actually_transferred <= 1024 && pc->buffer) {
- printk(", rst = ");
- scsi_buf = pc->scsi_cmd->request_buffer;
- hexdump(scsi_buf, min_t(unsigned, 16, pc->scsi_cmd->request_bufflen));
- } else printk("\n");
- }
}
host = pc->scsi_cmd->device->host;
spin_lock_irqsave(host->host_lock, flags);
static int idescsi_expiry(ide_drive_t *drive)
{
- idescsi_scsi_t *scsi = drive->driver_data;
+ idescsi_scsi_t *scsi = drive_to_idescsi(drive);
idescsi_pc_t *pc = scsi->pc;
#if IDESCSI_DEBUG_LOG
/* No more interrupts */
if (test_bit(IDESCSI_LOG_CMD, &scsi->log))
printk (KERN_INFO "Packet command completed, %d bytes transferred\n", pc->actually_transferred);
- local_irq_enable();
+ local_irq_enable_in_hardirq();
if (status.b.check)
rq->errors++;
idescsi_end_request (drive, 1, 0);
return 1;
sg = hwif->sg_table;
- scsi_sg = pc->scsi_cmd->request_buffer;
- segments = pc->scsi_cmd->use_sg;
+ scsi_sg = scsi_sglist(pc->scsi_cmd);
+ segments = scsi_sg_count(pc->scsi_cmd);
if (segments > hwif->sg_max_nents)
return 1;
- if (!segments) {
- hwif->sg_nents = 1;
- sg_init_one(sg, pc->scsi_cmd->request_buffer, pc->request_transfer);
- } else {
- hwif->sg_nents = segments;
- memcpy(sg, scsi_sg, sizeof(*sg) * segments);
- }
+ hwif->sg_nents = segments;
+ memcpy(sg, scsi_sg, sizeof(*sg) * segments);
return 0;
}
static ide_startstop_t idescsi_do_request (ide_drive_t *drive, struct request *rq, sector_t block)
{
#if IDESCSI_DEBUG_LOG
- printk (KERN_INFO "rq_status: %d, dev: %s, cmd: %x, errors: %d\n",rq->rq_status, rq->rq_disk->disk_name,rq->cmd[0],rq->errors);
+ printk (KERN_INFO "dev: %s, cmd: %x, errors: %d\n", rq->rq_disk->disk_name,rq->cmd[0],rq->errors);
printk (KERN_INFO "sector: %ld, nr_sectors: %ld, current_nr_sectors: %d\n",rq->sector,rq->nr_sectors,rq->current_nr_sectors);
#endif /* IDESCSI_DEBUG_LOG */
- if (rq->flags & (REQ_SPECIAL|REQ_SENSE)) {
+ if (blk_sense_request(rq) || blk_special_request(rq)) {
return idescsi_issue_pc (drive, (idescsi_pc_t *) rq->special);
}
blk_dump_rq_flags(rq, "ide-scsi: unsup command");
return ide_stopped;
}
+#ifdef CONFIG_IDE_PROC_FS
static void idescsi_add_settings(ide_drive_t *drive)
{
idescsi_scsi_t *scsi = drive_to_idescsi(drive);
/*
- * 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, "bios_cyl", SETTING_RW, -1, -1, TYPE_INT, 0, 1023, 1, 1, &drive->bios_cyl, NULL);
- ide_add_setting(drive, "bios_head", SETTING_RW, -1, -1, TYPE_BYTE, 0, 255, 1, 1, &drive->bios_head, NULL);
- ide_add_setting(drive, "bios_sect", SETTING_RW, -1, -1, TYPE_BYTE, 0, 63, 1, 1, &drive->bios_sect, NULL);
- ide_add_setting(drive, "transform", SETTING_RW, -1, -1, TYPE_INT, 0, 3, 1, 1, &scsi->transform, NULL);
- ide_add_setting(drive, "log", SETTING_RW, -1, -1, TYPE_INT, 0, 1, 1, 1, &scsi->log, NULL);
+ ide_add_setting(drive, "bios_cyl", SETTING_RW, TYPE_INT, 0, 1023, 1, 1, &drive->bios_cyl, NULL);
+ ide_add_setting(drive, "bios_head", SETTING_RW, TYPE_BYTE, 0, 255, 1, 1, &drive->bios_head, NULL);
+ ide_add_setting(drive, "bios_sect", SETTING_RW, TYPE_BYTE, 0, 63, 1, 1, &drive->bios_sect, NULL);
+ ide_add_setting(drive, "transform", SETTING_RW, TYPE_INT, 0, 3, 1, 1, &scsi->transform, NULL);
+ ide_add_setting(drive, "log", SETTING_RW, TYPE_INT, 0, 1, 1, 1, &scsi->log, NULL);
}
+#else
+static inline void idescsi_add_settings(ide_drive_t *drive) { ; }
+#endif
/*
* Driver initialization.
{
if (drive->id && (drive->id->config & 0x0060) == 0x20)
set_bit (IDESCSI_DRQ_INTERRUPT, &scsi->flags);
- set_bit(IDESCSI_TRANSFORM, &scsi->transform);
clear_bit(IDESCSI_SG_TRANSFORM, &scsi->transform);
#if IDESCSI_DEBUG_LOG
set_bit(IDESCSI_LOG_CMD, &scsi->log);
struct ide_scsi_obj *scsi = scsihost_to_idescsi(scsihost);
struct gendisk *g = scsi->disk;
- ide_unregister_subdriver(drive, scsi->driver);
+ scsi_remove_host(scsihost);
+ ide_proc_unregister_driver(drive, scsi->driver);
ide_unregister_region(g);
g->private_data = NULL;
put_disk(g);
- scsi_remove_host(scsihost);
ide_scsi_put(scsi);
}
static int ide_scsi_probe(ide_drive_t *);
-#ifdef CONFIG_PROC_FS
+#ifdef CONFIG_IDE_PROC_FS
static ide_proc_entry_t idescsi_proc[] = {
{ "capacity", S_IFREG|S_IRUGO, proc_ide_read_capacity, NULL },
{ NULL, 0, NULL, NULL }
};
-#else
-# define idescsi_proc NULL
#endif
static ide_driver_t idescsi_driver = {
.version = IDESCSI_VERSION,
.media = ide_scsi,
.supports_dsc_overlap = 0,
- .proc = idescsi_proc,
.do_request = idescsi_do_request,
.end_request = idescsi_end_request,
.error = idescsi_atapi_error,
.abort = idescsi_atapi_abort,
+#ifdef CONFIG_IDE_PROC_FS
+ .proc = idescsi_proc,
+#endif
};
static int idescsi_ide_open(struct inode *inode, struct file *filp)
{
struct gendisk *disk = inode->i_bdev->bd_disk;
struct ide_scsi_obj *scsi;
- ide_drive_t *drive;
if (!(scsi = ide_scsi_get(disk)))
return -ENXIO;
- drive = scsi->drive;
-
- drive->usage++;
-
return 0;
}
{
struct gendisk *disk = inode->i_bdev->bd_disk;
struct ide_scsi_obj *scsi = ide_scsi_g(disk);
- ide_drive_t *drive = scsi->drive;
-
- drive->usage--;
ide_scsi_put(scsi);
static int idescsi_slave_configure(struct scsi_device * sdp)
{
/* Configure detected device */
+ sdp->use_10_for_rw = 1;
+ sdp->use_10_for_ms = 1;
scsi_adjust_queue_depth(sdp, MSG_SIMPLE_TAG, sdp->host->cmd_per_lun);
return 0;
}
return -EINVAL;
}
-static inline int should_transform(ide_drive_t *drive, struct scsi_cmnd *cmd)
-{
- idescsi_scsi_t *scsi = drive_to_idescsi(drive);
-
- /* this was a layering violation and we can't support it
- anymore, sorry. */
-#if 0
- struct gendisk *disk = cmd->request->rq_disk;
-
- if (disk) {
- struct struct scsi_device_Template **p = disk->private_data;
- if (strcmp((*p)->scsi_driverfs_driver.name, "sg") == 0)
- return test_bit(IDESCSI_SG_TRANSFORM, &scsi->transform);
- }
-#endif
- return test_bit(IDESCSI_TRANSFORM, &scsi->transform);
-}
-
static int idescsi_queue (struct scsi_cmnd *cmd,
void (*done)(struct scsi_cmnd *))
{
pc->flags = 0;
pc->rq = rq;
memcpy (pc->c, cmd->cmnd, cmd->cmd_len);
- if (cmd->use_sg) {
- pc->buffer = NULL;
- pc->sg = cmd->request_buffer;
- } else {
- pc->buffer = cmd->request_buffer;
- pc->sg = NULL;
- }
+ pc->buffer = NULL;
+ pc->sg = scsi_sglist(cmd);
+ pc->sg_cnt = scsi_sg_count(cmd);
pc->b_count = 0;
- pc->request_transfer = pc->buffer_size = cmd->request_bufflen;
+ pc->request_transfer = pc->buffer_size = scsi_bufflen(cmd);
pc->scsi_cmd = cmd;
pc->done = done;
pc->timeout = jiffies + cmd->timeout_per_command;
- if (should_transform(drive, cmd))
- set_bit(PC_TRANSFORM, &pc->flags);
- idescsi_transform_pc1 (drive, pc);
-
if (test_bit(IDESCSI_LOG_CMD, &scsi->log)) {
printk ("ide-scsi: %s: que %lu, cmd = ", drive->name, cmd->serial_number);
- hexdump(cmd->cmnd, cmd->cmd_len);
+ ide_scsi_hex_dump(cmd->cmnd, cmd->cmd_len);
if (memcmp(pc->c, cmd->cmnd, cmd->cmd_len)) {
printk ("ide-scsi: %s: que %lu, tsl = ", drive->name, cmd->serial_number);
- hexdump(pc->c, 12);
+ ide_scsi_hex_dump(pc->c, 12);
}
}
ide_init_drive_cmd (rq);
rq->special = (char *) pc;
- rq->flags = REQ_SPECIAL;
+ rq->cmd_type = REQ_TYPE_SPECIAL;
spin_unlock_irq(host->host_lock);
rq->rq_disk = scsi->disk;
(void) ide_do_drive_cmd (drive, rq, ide_end);
*/
printk (KERN_ERR "ide-scsi: cmd aborted!\n");
- if (scsi->pc->rq->flags & REQ_SENSE)
+ if (blk_sense_request(scsi->pc->rq))
kfree(scsi->pc->buffer);
kfree(scsi->pc->rq);
kfree(scsi->pc);
/* kill current request */
blkdev_dequeue_request(req);
end_that_request_last(req, 0);
- if (req->flags & REQ_SENSE)
+ if (blk_sense_request(req))
kfree(scsi->pc->buffer);
kfree(scsi->pc);
scsi->pc = NULL;
warned = 1;
}
+ if (idescsi_nocd && drive->media == ide_cdrom)
+ return -ENODEV;
+
if (!strstr("ide-scsi", drive->driver_req) ||
!drive->present ||
drive->media == ide_disk ||
idescsi->host = host;
idescsi->disk = g;
g->private_data = &idescsi->driver;
- ide_register_subdriver(drive, &idescsi_driver);
+ ide_proc_register_driver(drive, &idescsi_driver);
err = 0;
idescsi_setup(drive, idescsi);
g->fops = &idescsi_ops;
}
/* fall through on error */
ide_unregister_region(g);
- ide_unregister_subdriver(drive, &idescsi_driver);
+ ide_proc_unregister_driver(drive, &idescsi_driver);
put_disk(g);
out_host_put:
driver_unregister(&idescsi_driver.gen_driver);
}
+module_param(idescsi_nocd, int, 0600);
+MODULE_PARM_DESC(idescsi_nocd, "Disable handling of CD-ROMs so they may be driven by ide-cd");
module_init(init_idescsi_module);
module_exit(exit_idescsi_module);
MODULE_LICENSE("GPL");
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff