* and is not licensed separately. See file COPYING for details.
*
* TODO (sorted by decreasing priority)
+ * -- Return sense now that rq allows it (we always auto-sense anyway).
* -- set readonly flag for CDs, set removable flag for CF readers
* -- do inquiry and verify we got a disk and not a tape (for LUN mismatch)
- * -- special case some senses, e.g. 3a/0 -> no media present, reduce retries
* -- verify the 13 conditions and do bulk resets
- * -- kill last_pipe and simply do two-state clearing on both pipes
* -- highmem
* -- move top_sense and work_bcs into separate allocations (if they survive)
* for cache purists and esoteric architectures.
* -- Allocate structure for LUN 0 before the first ub_sync_tur, avoid NULL. ?
* -- prune comments, they are too volumnous
- * -- Exterminate P3 printks
* -- Resove XXX's
- * -- Redo "benh's retries", perhaps have spin-up code to handle them. V:D=?
* -- CLEAR, CLR2STS, CLRRS seem to be ripe for refactoring.
*/
#include <linux/kernel.h>
#include <linux/usb.h>
#include <linux/usb_usual.h>
#include <linux/blkdev.h>
-#include <linux/devfs_fs_kernel.h>
#include <linux/timer.h>
+#include <linux/scatterlist.h>
#include <scsi/scsi.h>
#define DRV_NAME "ub"
-#define DEVFS_NAME DRV_NAME
#define UB_MAJOR 180
#define UB_DIR_ILLEGAL2 2
#define UB_DIR_WRITE 3
-/* P3 */
#define UB_DIR_CHAR(c) (((c)==UB_DIR_WRITE)? 'w': \
(((c)==UB_DIR_READ)? 'r': 'n'))
static void ub_cmd_build_packet(struct ub_dev *sc, struct ub_lun *lun,
struct ub_scsi_cmd *cmd, struct ub_request *urq);
static void ub_rw_cmd_done(struct ub_dev *sc, struct ub_scsi_cmd *cmd);
-static void ub_end_rq(struct request *rq, int uptodate);
+static void ub_end_rq(struct request *rq, unsigned int status,
+ unsigned int cmd_len);
static int ub_rw_cmd_retry(struct ub_dev *sc, struct ub_lun *lun,
struct ub_request *urq, struct ub_scsi_cmd *cmd);
static int ub_submit_scsi(struct ub_dev *sc, struct ub_scsi_cmd *cmd);
-static void ub_urb_complete(struct urb *urb, struct pt_regs *pt);
+static void ub_urb_complete(struct urb *urb);
static void ub_scsi_action(unsigned long _dev);
static void ub_scsi_dispatch(struct ub_dev *sc);
static void ub_scsi_urb_compl(struct ub_dev *sc, struct ub_scsi_cmd *cmd);
int stalled_pipe);
static void ub_top_sense_done(struct ub_dev *sc, struct ub_scsi_cmd *scmd);
static void ub_reset_enter(struct ub_dev *sc, int try);
-static void ub_reset_task(void *arg);
+static void ub_reset_task(struct work_struct *work);
static int ub_sync_tur(struct ub_dev *sc, struct ub_lun *lun);
static int ub_sync_read_cap(struct ub_dev *sc, struct ub_lun *lun,
struct ub_capacity *ret);
{
struct list_head *p;
struct ub_lun *lun;
- request_queue_t *q;
+ struct request_queue *q;
while (!list_empty(&sc->luns)) {
p = sc->luns.next;
kfree(lun);
}
+ usb_set_intfdata(sc->intf, NULL);
+ usb_put_intf(sc->intf);
+ usb_put_dev(sc->dev);
kfree(sc);
}
* The request function is our main entry point
*/
-static void ub_request_fn(request_queue_t *q)
+static void ub_request_fn(struct request_queue *q)
{
struct ub_lun *lun = q->queuedata;
struct request *rq;
struct ub_request *urq;
int n_elem;
- if (atomic_read(&sc->poison) || lun->changed) {
+ if (atomic_read(&sc->poison)) {
blkdev_dequeue_request(rq);
- ub_end_rq(rq, 0);
+ ub_end_rq(rq, DID_NO_CONNECT << 16, blk_rq_bytes(rq));
+ return 0;
+ }
+
+ if (lun->changed && !blk_pc_request(rq)) {
+ blkdev_dequeue_request(rq);
+ ub_end_rq(rq, SAM_STAT_CHECK_CONDITION, blk_rq_bytes(rq));
return 0;
}
/*
* get scatterlist from block layer
*/
+ sg_init_table(&urq->sgv[0], UB_MAX_REQ_SG);
n_elem = blk_rq_map_sg(lun->disk->queue, rq, &urq->sgv[0]);
if (n_elem < 0) {
+ /* Impossible, because blk_rq_map_sg should not hit ENOMEM. */
printk(KERN_INFO "%s: failed request map (%d)\n",
- lun->name, n_elem); /* P3 */
+ lun->name, n_elem);
goto drop;
}
if (n_elem > UB_MAX_REQ_SG) { /* Paranoia */
drop:
ub_put_cmd(lun, cmd);
- ub_end_rq(rq, 0);
+ ub_end_rq(rq, DID_ERROR << 16, blk_rq_bytes(rq));
return 0;
}
struct ub_lun *lun = cmd->lun;
struct ub_request *urq = cmd->back;
struct request *rq;
- int uptodate;
+ unsigned int scsi_status;
+ unsigned int cmd_len;
rq = urq->rq;
if (cmd->error == 0) {
- uptodate = 1;
-
if (blk_pc_request(rq)) {
if (cmd->act_len >= rq->data_len)
rq->data_len = 0;
else
rq->data_len -= cmd->act_len;
+ scsi_status = 0;
+ } else {
+ if (cmd->act_len != cmd->len) {
+ if ((cmd->key == MEDIUM_ERROR ||
+ cmd->key == UNIT_ATTENTION) &&
+ ub_rw_cmd_retry(sc, lun, urq, cmd) == 0)
+ return;
+ scsi_status = SAM_STAT_CHECK_CONDITION;
+ } else {
+ scsi_status = 0;
+ }
}
} else {
- uptodate = 0;
-
if (blk_pc_request(rq)) {
/* UB_SENSE_SIZE is smaller than SCSI_SENSE_BUFFERSIZE */
memcpy(rq->sense, sc->top_sense, UB_SENSE_SIZE);
rq->sense_len = UB_SENSE_SIZE;
if (sc->top_sense[0] != 0)
- rq->errors = SAM_STAT_CHECK_CONDITION;
+ scsi_status = SAM_STAT_CHECK_CONDITION;
else
- rq->errors = DID_ERROR << 16;
+ scsi_status = DID_ERROR << 16;
} else {
if (cmd->error == -EIO) {
if (ub_rw_cmd_retry(sc, lun, urq, cmd) == 0)
return;
}
+ scsi_status = SAM_STAT_CHECK_CONDITION;
}
}
urq->rq = NULL;
+ cmd_len = cmd->len;
ub_put_cmd(lun, cmd);
- ub_end_rq(rq, uptodate);
+ ub_end_rq(rq, scsi_status, cmd_len);
blk_start_queue(lun->disk->queue);
}
-static void ub_end_rq(struct request *rq, int uptodate)
+static void ub_end_rq(struct request *rq, unsigned int scsi_status,
+ unsigned int cmd_len)
{
- end_that_request_first(rq, uptodate, rq->hard_nr_sectors);
- end_that_request_last(rq, uptodate);
+ int error;
+ long rqlen;
+
+ if (scsi_status == 0) {
+ error = 0;
+ } else {
+ error = -EIO;
+ rq->errors = scsi_status;
+ }
+ rqlen = blk_rq_bytes(rq); /* Oddly enough, this is the residue. */
+ if (__blk_end_request(rq, error, cmd_len)) {
+ printk(KERN_WARNING DRV_NAME
+ ": __blk_end_request blew, %s-cmd total %u rqlen %ld\n",
+ blk_pc_request(rq)? "pc": "fs", cmd_len, rqlen);
+ }
}
static int ub_rw_cmd_retry(struct ub_dev *sc, struct ub_lun *lun,
if (urq->current_try >= 3)
return -EIO;
urq->current_try++;
- /* P3 */ printk("%s: dir %c len/act %d/%d "
+
+ /* Remove this if anyone complains of flooding. */
+ printk(KERN_DEBUG "%s: dir %c len/act %d/%d "
"[sense %x %02x %02x] retry %d\n",
sc->name, UB_DIR_CHAR(cmd->dir), cmd->len, cmd->act_len,
cmd->key, cmd->asc, cmd->ascq, urq->current_try);
usb_fill_bulk_urb(&sc->work_urb, sc->dev, sc->send_bulk_pipe,
bcb, US_BULK_CB_WRAP_LEN, ub_urb_complete, sc);
- /* Fill what we shouldn't be filling, because usb-storage did so. */
- sc->work_urb.actual_length = 0;
- sc->work_urb.error_count = 0;
- sc->work_urb.status = 0;
-
if ((rc = usb_submit_urb(&sc->work_urb, GFP_ATOMIC)) != 0) {
/* XXX Clear stalls */
ub_complete(&sc->work_done);
* the sc->lock taken) and from an interrupt (while we do NOT have
* the sc->lock taken). Therefore, bounce this off to a tasklet.
*/
-static void ub_urb_complete(struct urb *urb, struct pt_regs *pt)
+static void ub_urb_complete(struct urb *urb)
{
struct ub_dev *sc = urb->context;
* to check. But it's not all right if the device
* counts disagree with our counts.
*/
- /* P3 */ printk("%s: resid %d len %d act %d\n",
- sc->name, len, cmd->len, cmd->act_len);
goto Bad_End;
}
ub_state_sense(sc, cmd);
return;
case US_BULK_STAT_PHASE:
- /* P3 */ printk("%s: status PHASE\n", sc->name);
goto Bad_End;
default:
printk(KERN_INFO "%s: unknown CSW status 0x%x\n",
else
pipe = sc->send_bulk_pipe;
sc->last_pipe = pipe;
- usb_fill_bulk_urb(&sc->work_urb, sc->dev, pipe,
- page_address(sg->page) + sg->offset, sg->length,
- ub_urb_complete, sc);
- sc->work_urb.actual_length = 0;
- sc->work_urb.error_count = 0;
- sc->work_urb.status = 0;
+ usb_fill_bulk_urb(&sc->work_urb, sc->dev, pipe, sg_virt(sg),
+ sg->length, ub_urb_complete, sc);
if ((rc = usb_submit_urb(&sc->work_urb, GFP_ATOMIC)) != 0) {
/* XXX Clear stalls */
sc->last_pipe = sc->recv_bulk_pipe;
usb_fill_bulk_urb(&sc->work_urb, sc->dev, sc->recv_bulk_pipe,
&sc->work_bcs, US_BULK_CS_WRAP_LEN, ub_urb_complete, sc);
- sc->work_urb.actual_length = 0;
- sc->work_urb.error_count = 0;
- sc->work_urb.status = 0;
if ((rc = usb_submit_urb(&sc->work_urb, GFP_ATOMIC)) != 0) {
/* XXX Clear stalls */
scmd->state = UB_CMDST_INIT;
scmd->nsg = 1;
sg = &scmd->sgv[0];
- sg->page = virt_to_page(sc->top_sense);
- sg->offset = (unsigned long)sc->top_sense & (PAGE_SIZE-1);
- sg->length = UB_SENSE_SIZE;
+ sg_init_table(sg, UB_MAX_REQ_SG);
+ sg_set_page(sg, virt_to_page(sc->top_sense), UB_SENSE_SIZE,
+ (unsigned long)sc->top_sense & (PAGE_SIZE-1));
scmd->len = UB_SENSE_SIZE;
scmd->lun = cmd->lun;
scmd->done = ub_top_sense_done;
usb_fill_control_urb(&sc->work_urb, sc->dev, sc->send_ctrl_pipe,
(unsigned char*) cr, NULL, 0, ub_urb_complete, sc);
- sc->work_urb.actual_length = 0;
- sc->work_urb.error_count = 0;
- sc->work_urb.status = 0;
if ((rc = usb_submit_urb(&sc->work_urb, GFP_ATOMIC)) != 0) {
ub_complete(&sc->work_done);
#endif
#if 0 /* We let them stop themselves. */
- struct list_head *p;
struct ub_lun *lun;
- list_for_each(p, &sc->luns) {
- lun = list_entry(p, struct ub_lun, link);
+ list_for_each_entry(lun, &sc->luns, link) {
blk_stop_queue(lun->disk->queue);
}
#endif
schedule_work(&sc->reset_work);
}
-static void ub_reset_task(void *arg)
+static void ub_reset_task(struct work_struct *work)
{
- struct ub_dev *sc = arg;
+ struct ub_dev *sc = container_of(work, struct ub_dev, reset_work);
unsigned long flags;
- struct list_head *p;
struct ub_lun *lun;
int lkr, rc;
}
if (atomic_read(&sc->poison)) {
- printk(KERN_NOTICE "%s: Not resetting disconnected device\n",
- sc->name); /* P3 This floods. Remove soon. XXX */
+ ;
} else if ((sc->reset & 1) == 0) {
ub_sync_reset(sc);
msleep(700); /* usb-storage sleeps 6s (!) */
ub_probe_clear_stall(sc, sc->recv_bulk_pipe);
ub_probe_clear_stall(sc, sc->send_bulk_pipe);
} else if (sc->dev->actconfig->desc.bNumInterfaces != 1) {
- printk(KERN_NOTICE "%s: Not resetting multi-interface device\n",
- sc->name); /* P3 This floods. Remove soon. XXX */
+ ;
} else {
if ((lkr = usb_lock_device_for_reset(sc->dev, sc->intf)) < 0) {
printk(KERN_NOTICE
spin_lock_irqsave(sc->lock, flags);
sc->reset = 0;
tasklet_schedule(&sc->tasklet);
- list_for_each(p, &sc->luns) {
- lun = list_entry(p, struct ub_lun, link);
+ list_for_each_entry(lun, &sc->luns, link) {
blk_start_queue(lun->disk->queue);
}
wake_up(&sc->reset_wait);
static int ub_bd_open(struct inode *inode, struct file *filp)
{
struct gendisk *disk = inode->i_bdev->bd_disk;
- struct ub_lun *lun;
- struct ub_dev *sc;
+ struct ub_lun *lun = disk->private_data;
+ struct ub_dev *sc = lun->udev;
unsigned long flags;
int rc;
- if ((lun = disk->private_data) == NULL)
- return -ENXIO;
- sc = lun->udev;
-
spin_lock_irqsave(&ub_lock, flags);
if (atomic_read(&sc->poison)) {
spin_unlock_irqrestore(&ub_lock, flags);
struct gendisk *disk = inode->i_bdev->bd_disk;
void __user *usermem = (void __user *) arg;
- return scsi_cmd_ioctl(filp, disk, cmd, usermem);
+ return scsi_cmd_ioctl(filp, disk->queue, disk, cmd, usermem);
}
/*
rc = ub_submit_scsi(sc, cmd);
spin_unlock_irqrestore(sc->lock, flags);
- if (rc != 0) {
- printk("ub: testing ready: submit error (%d)\n", rc); /* P3 */
+ if (rc != 0)
goto err_submit;
- }
wait_for_completion(&compl);
cmd->state = UB_CMDST_INIT;
cmd->nsg = 1;
sg = &cmd->sgv[0];
- sg->page = virt_to_page(p);
- sg->offset = (unsigned long)p & (PAGE_SIZE-1);
- sg->length = 8;
+ sg_init_table(sg, UB_MAX_REQ_SG);
+ sg_set_page(sg, virt_to_page(p), 8, (unsigned long)p & (PAGE_SIZE-1));
cmd->len = 8;
cmd->lun = lun;
cmd->done = ub_probe_done;
rc = ub_submit_scsi(sc, cmd);
spin_unlock_irqrestore(sc->lock, flags);
- if (rc != 0) {
- printk("ub: reading capacity: submit error (%d)\n", rc); /* P3 */
+ if (rc != 0)
goto err_submit;
- }
wait_for_completion(&compl);
if (cmd->error != 0) {
- printk("ub: reading capacity: error %d\n", cmd->error); /* P3 */
rc = -EIO;
goto err_read;
}
if (cmd->act_len != 8) {
- printk("ub: reading capacity: size %d\n", cmd->act_len); /* P3 */
rc = -EIO;
goto err_read;
}
case 2048: shift = 2; break;
case 4096: shift = 3; break;
default:
- printk("ub: Bad sector size %u\n", bsize); /* P3 */
rc = -EDOM;
goto err_inv_bsize;
}
/*
*/
-static void ub_probe_urb_complete(struct urb *urb, struct pt_regs *pt)
+static void ub_probe_urb_complete(struct urb *urb)
{
struct completion *cop = urb->context;
complete(cop);
usb_fill_control_urb(&sc->work_urb, sc->dev, sc->send_ctrl_pipe,
(unsigned char*) cr, NULL, 0, ub_probe_urb_complete, &compl);
- sc->work_urb.actual_length = 0;
- sc->work_urb.error_count = 0;
- sc->work_urb.status = 0;
if ((rc = usb_submit_urb(&sc->work_urb, GFP_KERNEL)) != 0) {
printk(KERN_WARNING
usb_fill_control_urb(&sc->work_urb, sc->dev, sc->recv_ctrl_pipe,
(unsigned char*) cr, p, 1, ub_probe_urb_complete, &compl);
- sc->work_urb.actual_length = 0;
- sc->work_urb.error_count = 0;
- sc->work_urb.status = 0;
- if ((rc = usb_submit_urb(&sc->work_urb, GFP_KERNEL)) != 0) {
- if (rc == -EPIPE) {
- printk("%s: Stall submitting GetMaxLUN, using 1 LUN\n",
- sc->name); /* P3 */
- } else {
- printk(KERN_NOTICE
- "%s: Unable to submit GetMaxLUN (%d)\n",
- sc->name, rc);
- }
+ if ((rc = usb_submit_urb(&sc->work_urb, GFP_KERNEL)) != 0)
goto err_submit;
- }
init_timer(&timer);
timer.function = ub_probe_timeout;
del_timer_sync(&timer);
usb_kill_urb(&sc->work_urb);
- if ((rc = sc->work_urb.status) < 0) {
- if (rc == -EPIPE) {
- printk("%s: Stall at GetMaxLUN, using 1 LUN\n",
- sc->name); /* P3 */
- } else {
- printk(KERN_NOTICE
- "%s: Error at GetMaxLUN (%d)\n",
- sc->name, rc);
- }
+ if ((rc = sc->work_urb.status) < 0)
goto err_io;
- }
if (sc->work_urb.actual_length != 1) {
- printk("%s: GetMaxLUN returned %d bytes\n", sc->name,
- sc->work_urb.actual_length); /* P3 */
nluns = 0;
} else {
if ((nluns = *p) == 55) {
if (nluns > UB_MAX_LUNS)
nluns = UB_MAX_LUNS;
}
- printk("%s: GetMaxLUN returned %d, using %d LUNs\n", sc->name,
- *p, nluns); /* P3 */
}
kfree(p);
usb_fill_control_urb(&sc->work_urb, sc->dev, sc->send_ctrl_pipe,
(unsigned char*) cr, NULL, 0, ub_probe_urb_complete, &compl);
- sc->work_urb.actual_length = 0;
- sc->work_urb.error_count = 0;
- sc->work_urb.status = 0;
if ((rc = usb_submit_urb(&sc->work_urb, GFP_KERNEL)) != 0) {
printk(KERN_WARNING
if ((ep->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK)
== USB_ENDPOINT_XFER_BULK) {
/* BULK in or out? */
- if (ep->bEndpointAddress & USB_DIR_IN)
- ep_in = ep;
- else
- ep_out = ep;
+ if (ep->bEndpointAddress & USB_DIR_IN) {
+ if (ep_in == NULL)
+ ep_in = ep;
+ } else {
+ if (ep_out == NULL)
+ ep_out = ep;
+ }
}
}
usb_init_urb(&sc->work_urb);
tasklet_init(&sc->tasklet, ub_scsi_action, (unsigned long)sc);
atomic_set(&sc->poison, 0);
- INIT_WORK(&sc->reset_work, ub_reset_task, sc);
+ INIT_WORK(&sc->reset_work, ub_reset_task);
init_waitqueue_head(&sc->reset_wait);
init_timer(&sc->work_timer);
// sc->ifnum = intf->cur_altsetting->desc.bInterfaceNumber;
usb_set_intfdata(intf, sc);
usb_get_dev(sc->dev);
- // usb_get_intf(sc->intf); /* Do we need this? */
+ /*
+ * Since we give the interface struct to the block level through
+ * disk->driverfs_dev, we have to pin it. Otherwise, block_uevent
+ * oopses on close after a disconnect (kernels 2.6.16 and up).
+ */
+ usb_get_intf(sc->intf);
snprintf(sc->name, 12, DRV_NAME "(%d.%d)",
sc->dev->bus->busnum, sc->dev->devnum);
* has to succeed, so we clear checks with an additional one here.
* In any case it's not our business how revaliadation is implemented.
*/
- for (i = 0; i < 3; i++) { /* Retries for benh's key */
+ for (i = 0; i < 3; i++) { /* Retries for the schwag key from KS'04 */
if ((rc = ub_sync_tur(sc, NULL)) <= 0) break;
if (rc != 0x6) break;
msleep(10);
err_dev_desc:
usb_set_intfdata(intf, NULL);
- // usb_put_intf(sc->intf);
+ usb_put_intf(sc->intf);
usb_put_dev(sc->dev);
kfree(sc);
err_core:
static int ub_probe_lun(struct ub_dev *sc, int lnum)
{
struct ub_lun *lun;
- request_queue_t *q;
+ struct request_queue *q;
struct gendisk *disk;
int rc;
goto err_id;
lun->udev = sc;
- list_add(&lun->link, &sc->luns);
snprintf(lun->name, 16, DRV_NAME "%c(%d.%d.%d)",
lun->id + 'a', sc->dev->bus->busnum, sc->dev->devnum, lun->num);
if ((disk = alloc_disk(UB_PARTS_PER_LUN)) == NULL)
goto err_diskalloc;
- lun->disk = disk;
sprintf(disk->disk_name, DRV_NAME "%c", lun->id + 'a');
- sprintf(disk->devfs_name, DEVFS_NAME "/%c", lun->id + 'a');
disk->major = UB_MAJOR;
disk->first_minor = lun->id * UB_PARTS_PER_LUN;
disk->fops = &ub_bd_fops;
blk_queue_max_sectors(q, UB_MAX_SECTORS);
blk_queue_hardsect_size(q, lun->capacity.bsize);
+ lun->disk = disk;
q->queuedata = lun;
+ list_add(&lun->link, &sc->luns);
set_capacity(disk, lun->capacity.nsec);
if (lun->removable)
err_blkqinit:
put_disk(disk);
err_diskalloc:
- list_del(&lun->link);
ub_id_put(lun->id);
err_id:
kfree(lun);
static void ub_disconnect(struct usb_interface *intf)
{
struct ub_dev *sc = usb_get_intfdata(intf);
- struct list_head *p;
struct ub_lun *lun;
- struct gendisk *disk;
unsigned long flags;
/*
/*
* Unregister the upper layer.
*/
- list_for_each (p, &sc->luns) {
- lun = list_entry(p, struct ub_lun, link);
- disk = lun->disk;
- if (disk->flags & GENHD_FL_UP)
- del_gendisk(disk);
+ list_for_each_entry(lun, &sc->luns, link) {
+ del_gendisk(lun->disk);
/*
* I wish I could do:
- * set_bit(QUEUE_FLAG_DEAD, &q->queue_flags);
+ * queue_flag_set(QUEUE_FLAG_DEAD, q);
* As it is, we rely on our internal poisoning and let
* the upper levels to spin furiously failing all the I/O.
*/
* and no URBs left in transit.
*/
- usb_set_intfdata(intf, NULL);
- // usb_put_intf(sc->intf);
- sc->intf = NULL;
- usb_put_dev(sc->dev);
- sc->dev = NULL;
-
ub_put(sc);
}
if ((rc = register_blkdev(UB_MAJOR, DRV_NAME)) != 0)
goto err_regblkdev;
- devfs_mk_dir(DEVFS_NAME);
if ((rc = usb_register(&ub_driver)) != 0)
goto err_register;
return 0;
err_register:
- devfs_remove(DEVFS_NAME);
unregister_blkdev(UB_MAJOR, DRV_NAME);
err_regblkdev:
return rc;
{
usb_deregister(&ub_driver);
- devfs_remove(DEVFS_NAME);
unregister_blkdev(UB_MAJOR, DRV_NAME);
usb_usual_clear_present(USB_US_TYPE_UB);
}
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff