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path: root/drivers/usb/storage/uas.c
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Diffstat (limited to 'drivers/usb/storage/uas.c')
-rw-r--r--drivers/usb/storage/uas.c687
1 files changed, 437 insertions, 250 deletions
diff --git a/drivers/usb/storage/uas.c b/drivers/usb/storage/uas.c
index d966b59f7d7b..a7ac97cc5949 100644
--- a/drivers/usb/storage/uas.c
+++ b/drivers/usb/storage/uas.c
@@ -2,6 +2,7 @@
* USB Attached SCSI
* Note that this is not the same as the USB Mass Storage driver
*
+ * Copyright Hans de Goede <hdegoede@redhat.com> for Red Hat, Inc. 2013
* Copyright Matthew Wilcox for Intel Corp, 2010
* Copyright Sarah Sharp for Intel Corp, 2010
*
@@ -13,17 +14,21 @@
#include <linux/types.h>
#include <linux/module.h>
#include <linux/usb.h>
+#include <linux/usb_usual.h>
#include <linux/usb/hcd.h>
#include <linux/usb/storage.h>
#include <linux/usb/uas.h>
#include <scsi/scsi.h>
+#include <scsi/scsi_eh.h>
#include <scsi/scsi_dbg.h>
#include <scsi/scsi_cmnd.h>
#include <scsi/scsi_device.h>
#include <scsi/scsi_host.h>
#include <scsi/scsi_tcq.h>
+#include "uas-detect.h"
+
/*
* The r00-r01c specs define this version of the SENSE IU data structure.
* It's still in use by several different firmware releases.
@@ -45,12 +50,17 @@ struct uas_dev_info {
struct usb_anchor sense_urbs;
struct usb_anchor data_urbs;
int qdepth, resetting;
- struct response_ui response;
+ struct response_iu response;
unsigned cmd_pipe, status_pipe, data_in_pipe, data_out_pipe;
unsigned use_streams:1;
unsigned uas_sense_old:1;
+ unsigned running_task:1;
+ unsigned shutdown:1;
struct scsi_cmnd *cmnd;
spinlock_t lock;
+ struct work_struct work;
+ struct list_head inflight_list;
+ struct list_head dead_list;
};
enum {
@@ -85,103 +95,117 @@ static int uas_submit_urbs(struct scsi_cmnd *cmnd,
struct uas_dev_info *devinfo, gfp_t gfp);
static void uas_do_work(struct work_struct *work);
static int uas_try_complete(struct scsi_cmnd *cmnd, const char *caller);
+static void uas_free_streams(struct uas_dev_info *devinfo);
+static void uas_log_cmd_state(struct scsi_cmnd *cmnd, const char *caller);
-static DECLARE_WORK(uas_work, uas_do_work);
-static DEFINE_SPINLOCK(uas_work_lock);
-static LIST_HEAD(uas_work_list);
-
+/* Must be called with devinfo->lock held, will temporary unlock the lock */
static void uas_unlink_data_urbs(struct uas_dev_info *devinfo,
- struct uas_cmd_info *cmdinfo)
+ struct uas_cmd_info *cmdinfo,
+ unsigned long *lock_flags)
{
- unsigned long flags;
-
/*
* The UNLINK_DATA_URBS flag makes sure uas_try_complete
* (called by urb completion) doesn't release cmdinfo
* underneath us.
*/
- spin_lock_irqsave(&devinfo->lock, flags);
cmdinfo->state |= UNLINK_DATA_URBS;
- spin_unlock_irqrestore(&devinfo->lock, flags);
+ spin_unlock_irqrestore(&devinfo->lock, *lock_flags);
if (cmdinfo->data_in_urb)
usb_unlink_urb(cmdinfo->data_in_urb);
if (cmdinfo->data_out_urb)
usb_unlink_urb(cmdinfo->data_out_urb);
- spin_lock_irqsave(&devinfo->lock, flags);
+ spin_lock_irqsave(&devinfo->lock, *lock_flags);
cmdinfo->state &= ~UNLINK_DATA_URBS;
- spin_unlock_irqrestore(&devinfo->lock, flags);
}
static void uas_do_work(struct work_struct *work)
{
+ struct uas_dev_info *devinfo =
+ container_of(work, struct uas_dev_info, work);
struct uas_cmd_info *cmdinfo;
- struct uas_cmd_info *temp;
- struct list_head list;
unsigned long flags;
int err;
- spin_lock_irq(&uas_work_lock);
- list_replace_init(&uas_work_list, &list);
- spin_unlock_irq(&uas_work_lock);
-
- list_for_each_entry_safe(cmdinfo, temp, &list, list) {
+ spin_lock_irqsave(&devinfo->lock, flags);
+ list_for_each_entry(cmdinfo, &devinfo->inflight_list, list) {
struct scsi_pointer *scp = (void *)cmdinfo;
- struct scsi_cmnd *cmnd = container_of(scp,
- struct scsi_cmnd, SCp);
- struct uas_dev_info *devinfo = (void *)cmnd->device->hostdata;
- spin_lock_irqsave(&devinfo->lock, flags);
- err = uas_submit_urbs(cmnd, cmnd->device->hostdata, GFP_ATOMIC);
+ struct scsi_cmnd *cmnd = container_of(scp, struct scsi_cmnd,
+ SCp);
+
+ if (!(cmdinfo->state & IS_IN_WORK_LIST))
+ continue;
+
+ err = uas_submit_urbs(cmnd, cmnd->device->hostdata, GFP_NOIO);
if (!err)
cmdinfo->state &= ~IS_IN_WORK_LIST;
- spin_unlock_irqrestore(&devinfo->lock, flags);
- if (err) {
- list_del(&cmdinfo->list);
- spin_lock_irq(&uas_work_lock);
- list_add_tail(&cmdinfo->list, &uas_work_list);
- spin_unlock_irq(&uas_work_lock);
- schedule_work(&uas_work);
- }
+ else
+ schedule_work(&devinfo->work);
}
+ spin_unlock_irqrestore(&devinfo->lock, flags);
}
-static void uas_abort_work(struct uas_dev_info *devinfo)
+static void uas_mark_cmd_dead(struct uas_dev_info *devinfo,
+ struct uas_cmd_info *cmdinfo,
+ int result, const char *caller)
+{
+ struct scsi_pointer *scp = (void *)cmdinfo;
+ struct scsi_cmnd *cmnd = container_of(scp, struct scsi_cmnd, SCp);
+
+ uas_log_cmd_state(cmnd, caller);
+ WARN_ON_ONCE(!spin_is_locked(&devinfo->lock));
+ WARN_ON_ONCE(cmdinfo->state & COMMAND_ABORTED);
+ cmdinfo->state |= COMMAND_ABORTED;
+ cmdinfo->state &= ~IS_IN_WORK_LIST;
+ cmnd->result = result << 16;
+ list_move_tail(&cmdinfo->list, &devinfo->dead_list);
+}
+
+static void uas_abort_inflight(struct uas_dev_info *devinfo, int result,
+ const char *caller)
{
struct uas_cmd_info *cmdinfo;
struct uas_cmd_info *temp;
- struct list_head list;
unsigned long flags;
- spin_lock_irq(&uas_work_lock);
- list_replace_init(&uas_work_list, &list);
- spin_unlock_irq(&uas_work_lock);
+ spin_lock_irqsave(&devinfo->lock, flags);
+ list_for_each_entry_safe(cmdinfo, temp, &devinfo->inflight_list, list)
+ uas_mark_cmd_dead(devinfo, cmdinfo, result, caller);
+ spin_unlock_irqrestore(&devinfo->lock, flags);
+}
+
+static void uas_add_work(struct uas_cmd_info *cmdinfo)
+{
+ struct scsi_pointer *scp = (void *)cmdinfo;
+ struct scsi_cmnd *cmnd = container_of(scp, struct scsi_cmnd, SCp);
+ struct uas_dev_info *devinfo = cmnd->device->hostdata;
+
+ WARN_ON_ONCE(!spin_is_locked(&devinfo->lock));
+ cmdinfo->state |= IS_IN_WORK_LIST;
+ schedule_work(&devinfo->work);
+}
+
+static void uas_zap_dead(struct uas_dev_info *devinfo)
+{
+ struct uas_cmd_info *cmdinfo;
+ struct uas_cmd_info *temp;
+ unsigned long flags;
spin_lock_irqsave(&devinfo->lock, flags);
- list_for_each_entry_safe(cmdinfo, temp, &list, list) {
+ list_for_each_entry_safe(cmdinfo, temp, &devinfo->dead_list, list) {
struct scsi_pointer *scp = (void *)cmdinfo;
- struct scsi_cmnd *cmnd = container_of(scp,
- struct scsi_cmnd, SCp);
- struct uas_dev_info *di = (void *)cmnd->device->hostdata;
-
- if (di == devinfo) {
- cmdinfo->state |= COMMAND_ABORTED;
- cmdinfo->state &= ~IS_IN_WORK_LIST;
- if (devinfo->resetting) {
- /* uas_stat_cmplt() will not do that
- * when a device reset is in
- * progress */
- cmdinfo->state &= ~COMMAND_INFLIGHT;
- }
- uas_try_complete(cmnd, __func__);
- } else {
- /* not our uas device, relink into list */
- list_del(&cmdinfo->list);
- spin_lock_irq(&uas_work_lock);
- list_add_tail(&cmdinfo->list, &uas_work_list);
- spin_unlock_irq(&uas_work_lock);
- }
+ struct scsi_cmnd *cmnd = container_of(scp, struct scsi_cmnd,
+ SCp);
+ uas_log_cmd_state(cmnd, __func__);
+ WARN_ON_ONCE(!(cmdinfo->state & COMMAND_ABORTED));
+ /* all urbs are killed, clear inflight bits */
+ cmdinfo->state &= ~(COMMAND_INFLIGHT |
+ DATA_IN_URB_INFLIGHT |
+ DATA_OUT_URB_INFLIGHT);
+ uas_try_complete(cmnd, __func__);
}
+ devinfo->running_task = 0;
spin_unlock_irqrestore(&devinfo->lock, flags);
}
@@ -259,20 +283,19 @@ static int uas_try_complete(struct scsi_cmnd *cmnd, const char *caller)
struct uas_cmd_info *cmdinfo = (void *)&cmnd->SCp;
struct uas_dev_info *devinfo = (void *)cmnd->device->hostdata;
- WARN_ON(!spin_is_locked(&devinfo->lock));
+ WARN_ON_ONCE(!spin_is_locked(&devinfo->lock));
if (cmdinfo->state & (COMMAND_INFLIGHT |
DATA_IN_URB_INFLIGHT |
DATA_OUT_URB_INFLIGHT |
UNLINK_DATA_URBS))
return -EBUSY;
- BUG_ON(cmdinfo->state & COMMAND_COMPLETED);
+ WARN_ON_ONCE(cmdinfo->state & COMMAND_COMPLETED);
cmdinfo->state |= COMMAND_COMPLETED;
usb_free_urb(cmdinfo->data_in_urb);
usb_free_urb(cmdinfo->data_out_urb);
- if (cmdinfo->state & COMMAND_ABORTED) {
+ if (cmdinfo->state & COMMAND_ABORTED)
scmd_printk(KERN_INFO, cmnd, "abort completed\n");
- cmnd->result = DID_ABORT << 16;
- }
+ list_del(&cmdinfo->list);
cmnd->scsi_done(cmnd);
return 0;
}
@@ -286,11 +309,7 @@ static void uas_xfer_data(struct urb *urb, struct scsi_cmnd *cmnd,
cmdinfo->state |= direction | SUBMIT_STATUS_URB;
err = uas_submit_urbs(cmnd, cmnd->device->hostdata, GFP_ATOMIC);
if (err) {
- spin_lock(&uas_work_lock);
- list_add_tail(&cmdinfo->list, &uas_work_list);
- cmdinfo->state |= IS_IN_WORK_LIST;
- spin_unlock(&uas_work_lock);
- schedule_work(&uas_work);
+ uas_add_work(cmdinfo);
}
}
@@ -298,14 +317,20 @@ static void uas_stat_cmplt(struct urb *urb)
{
struct iu *iu = urb->transfer_buffer;
struct Scsi_Host *shost = urb->context;
- struct uas_dev_info *devinfo = (void *)shost->hostdata[0];
+ struct uas_dev_info *devinfo = (struct uas_dev_info *)shost->hostdata;
struct scsi_cmnd *cmnd;
struct uas_cmd_info *cmdinfo;
unsigned long flags;
u16 tag;
if (urb->status) {
- dev_err(&urb->dev->dev, "URB BAD STATUS %d\n", urb->status);
+ if (urb->status == -ENOENT) {
+ dev_err(&urb->dev->dev, "stat urb: killed, stream %d\n",
+ urb->stream_id);
+ } else {
+ dev_err(&urb->dev->dev, "stat urb: status %d\n",
+ urb->status);
+ }
usb_free_urb(urb);
return;
}
@@ -324,6 +349,9 @@ static void uas_stat_cmplt(struct urb *urb)
if (!cmnd) {
if (iu->iu_id == IU_ID_RESPONSE) {
+ if (!devinfo->running_task)
+ dev_warn(&urb->dev->dev,
+ "stat urb: recv unexpected response iu\n");
/* store results for uas_eh_task_mgmt() */
memcpy(&devinfo->response, iu, sizeof(devinfo->response));
}
@@ -346,17 +374,25 @@ static void uas_stat_cmplt(struct urb *urb)
uas_sense(urb, cmnd);
if (cmnd->result != 0) {
/* cancel data transfers on error */
- spin_unlock_irqrestore(&devinfo->lock, flags);
- uas_unlink_data_urbs(devinfo, cmdinfo);
- spin_lock_irqsave(&devinfo->lock, flags);
+ uas_unlink_data_urbs(devinfo, cmdinfo, &flags);
}
cmdinfo->state &= ~COMMAND_INFLIGHT;
uas_try_complete(cmnd, __func__);
break;
case IU_ID_READ_READY:
+ if (!cmdinfo->data_in_urb ||
+ (cmdinfo->state & DATA_IN_URB_INFLIGHT)) {
+ scmd_printk(KERN_ERR, cmnd, "unexpected read rdy\n");
+ break;
+ }
uas_xfer_data(urb, cmnd, SUBMIT_DATA_IN_URB);
break;
case IU_ID_WRITE_READY:
+ if (!cmdinfo->data_out_urb ||
+ (cmdinfo->state & DATA_OUT_URB_INFLIGHT)) {
+ scmd_printk(KERN_ERR, cmnd, "unexpected write rdy\n");
+ break;
+ }
uas_xfer_data(urb, cmnd, SUBMIT_DATA_OUT_URB);
break;
default:
@@ -383,8 +419,15 @@ static void uas_data_cmplt(struct urb *urb)
sdb = scsi_out(cmnd);
cmdinfo->state &= ~DATA_OUT_URB_INFLIGHT;
}
- BUG_ON(sdb == NULL);
- if (urb->status) {
+ if (sdb == NULL) {
+ WARN_ON_ONCE(1);
+ } else if (urb->status) {
+ if (urb->status != -ECONNRESET) {
+ uas_log_cmd_state(cmnd, __func__);
+ scmd_printk(KERN_ERR, cmnd,
+ "data cmplt err %d stream %d\n",
+ urb->status, urb->stream_id);
+ }
/* error: no data transfered */
sdb->resid = sdb->length;
} else {
@@ -394,6 +437,17 @@ static void uas_data_cmplt(struct urb *urb)
spin_unlock_irqrestore(&devinfo->lock, flags);
}
+static void uas_cmd_cmplt(struct urb *urb)
+{
+ struct scsi_cmnd *cmnd = urb->context;
+
+ if (urb->status) {
+ uas_log_cmd_state(cmnd, __func__);
+ scmd_printk(KERN_ERR, cmnd, "cmd cmplt err %d\n", urb->status);
+ }
+ usb_free_urb(urb);
+}
+
static struct urb *uas_alloc_data_urb(struct uas_dev_info *devinfo, gfp_t gfp,
unsigned int pipe, u16 stream_id,
struct scsi_cmnd *cmnd,
@@ -408,8 +462,7 @@ static struct urb *uas_alloc_data_urb(struct uas_dev_info *devinfo, gfp_t gfp,
goto out;
usb_fill_bulk_urb(urb, udev, pipe, NULL, sdb->length,
uas_data_cmplt, cmnd);
- if (devinfo->use_streams)
- urb->stream_id = stream_id;
+ urb->stream_id = stream_id;
urb->num_sgs = udev->bus->sg_tablesize ? sdb->table.nents : 0;
urb->sg = sdb->table.sgl;
out:
@@ -442,7 +495,7 @@ static struct urb *uas_alloc_sense_urb(struct uas_dev_info *devinfo, gfp_t gfp,
}
static struct urb *uas_alloc_cmd_urb(struct uas_dev_info *devinfo, gfp_t gfp,
- struct scsi_cmnd *cmnd, u16 stream_id)
+ struct scsi_cmnd *cmnd)
{
struct usb_device *udev = devinfo->udev;
struct scsi_device *sdev = cmnd->device;
@@ -472,7 +525,7 @@ static struct urb *uas_alloc_cmd_urb(struct uas_dev_info *devinfo, gfp_t gfp,
memcpy(iu->cdb, cmnd->cmnd, cmnd->cmd_len);
usb_fill_bulk_urb(urb, udev, devinfo->cmd_pipe, iu, sizeof(*iu) + len,
- usb_free_urb, NULL);
+ uas_cmd_cmplt, cmnd);
urb->transfer_flags |= URB_FREE_BUFFER;
out:
return urb;
@@ -512,13 +565,17 @@ static int uas_submit_task_urb(struct scsi_cmnd *cmnd, gfp_t gfp,
}
usb_fill_bulk_urb(urb, udev, devinfo->cmd_pipe, iu, sizeof(*iu),
- usb_free_urb, NULL);
+ uas_cmd_cmplt, cmnd);
urb->transfer_flags |= URB_FREE_BUFFER;
+ usb_anchor_urb(urb, &devinfo->cmd_urbs);
err = usb_submit_urb(urb, gfp);
- if (err)
+ if (err) {
+ usb_unanchor_urb(urb);
+ uas_log_cmd_state(cmnd, __func__);
+ scmd_printk(KERN_ERR, cmnd, "task submission err %d\n", err);
goto err;
- usb_anchor_urb(urb, &devinfo->cmd_urbs);
+ }
return 0;
@@ -533,38 +590,43 @@ err:
* daft to me.
*/
-static int uas_submit_sense_urb(struct Scsi_Host *shost,
- gfp_t gfp, unsigned int stream)
+static struct urb *uas_submit_sense_urb(struct scsi_cmnd *cmnd,
+ gfp_t gfp, unsigned int stream)
{
- struct uas_dev_info *devinfo = (void *)shost->hostdata[0];
+ struct Scsi_Host *shost = cmnd->device->host;
+ struct uas_dev_info *devinfo = (struct uas_dev_info *)shost->hostdata;
struct urb *urb;
+ int err;
urb = uas_alloc_sense_urb(devinfo, gfp, shost, stream);
if (!urb)
- return SCSI_MLQUEUE_DEVICE_BUSY;
- if (usb_submit_urb(urb, gfp)) {
+ return NULL;
+ usb_anchor_urb(urb, &devinfo->sense_urbs);
+ err = usb_submit_urb(urb, gfp);
+ if (err) {
+ usb_unanchor_urb(urb);
+ uas_log_cmd_state(cmnd, __func__);
shost_printk(KERN_INFO, shost,
- "sense urb submission failure\n");
+ "sense urb submission error %d stream %d\n",
+ err, stream);
usb_free_urb(urb);
- return SCSI_MLQUEUE_DEVICE_BUSY;
+ return NULL;
}
- usb_anchor_urb(urb, &devinfo->sense_urbs);
- return 0;
+ return urb;
}
static int uas_submit_urbs(struct scsi_cmnd *cmnd,
struct uas_dev_info *devinfo, gfp_t gfp)
{
struct uas_cmd_info *cmdinfo = (void *)&cmnd->SCp;
+ struct urb *urb;
int err;
- WARN_ON(!spin_is_locked(&devinfo->lock));
+ WARN_ON_ONCE(!spin_is_locked(&devinfo->lock));
if (cmdinfo->state & SUBMIT_STATUS_URB) {
- err = uas_submit_sense_urb(cmnd->device->host, gfp,
- cmdinfo->stream);
- if (err) {
- return err;
- }
+ urb = uas_submit_sense_urb(cmnd, gfp, cmdinfo->stream);
+ if (!urb)
+ return SCSI_MLQUEUE_DEVICE_BUSY;
cmdinfo->state &= ~SUBMIT_STATUS_URB;
}
@@ -578,14 +640,18 @@ static int uas_submit_urbs(struct scsi_cmnd *cmnd,
}
if (cmdinfo->state & SUBMIT_DATA_IN_URB) {
- if (usb_submit_urb(cmdinfo->data_in_urb, gfp)) {
+ usb_anchor_urb(cmdinfo->data_in_urb, &devinfo->data_urbs);
+ err = usb_submit_urb(cmdinfo->data_in_urb, gfp);
+ if (err) {
+ usb_unanchor_urb(cmdinfo->data_in_urb);
+ uas_log_cmd_state(cmnd, __func__);
scmd_printk(KERN_INFO, cmnd,
- "data in urb submission failure\n");
+ "data in urb submission error %d stream %d\n",
+ err, cmdinfo->data_in_urb->stream_id);
return SCSI_MLQUEUE_DEVICE_BUSY;
}
cmdinfo->state &= ~SUBMIT_DATA_IN_URB;
cmdinfo->state |= DATA_IN_URB_INFLIGHT;
- usb_anchor_urb(cmdinfo->data_in_urb, &devinfo->data_urbs);
}
if (cmdinfo->state & ALLOC_DATA_OUT_URB) {
@@ -598,33 +664,37 @@ static int uas_submit_urbs(struct scsi_cmnd *cmnd,
}
if (cmdinfo->state & SUBMIT_DATA_OUT_URB) {
- if (usb_submit_urb(cmdinfo->data_out_urb, gfp)) {
+ usb_anchor_urb(cmdinfo->data_out_urb, &devinfo->data_urbs);
+ err = usb_submit_urb(cmdinfo->data_out_urb, gfp);
+ if (err) {
+ usb_unanchor_urb(cmdinfo->data_out_urb);
+ uas_log_cmd_state(cmnd, __func__);
scmd_printk(KERN_INFO, cmnd,
- "data out urb submission failure\n");
+ "data out urb submission error %d stream %d\n",
+ err, cmdinfo->data_out_urb->stream_id);
return SCSI_MLQUEUE_DEVICE_BUSY;
}
cmdinfo->state &= ~SUBMIT_DATA_OUT_URB;
cmdinfo->state |= DATA_OUT_URB_INFLIGHT;
- usb_anchor_urb(cmdinfo->data_out_urb, &devinfo->data_urbs);
}
if (cmdinfo->state & ALLOC_CMD_URB) {
- cmdinfo->cmd_urb = uas_alloc_cmd_urb(devinfo, gfp, cmnd,
- cmdinfo->stream);
+ cmdinfo->cmd_urb = uas_alloc_cmd_urb(devinfo, gfp, cmnd);
if (!cmdinfo->cmd_urb)
return SCSI_MLQUEUE_DEVICE_BUSY;
cmdinfo->state &= ~ALLOC_CMD_URB;
}
if (cmdinfo->state & SUBMIT_CMD_URB) {
- usb_get_urb(cmdinfo->cmd_urb);
- if (usb_submit_urb(cmdinfo->cmd_urb, gfp)) {
+ usb_anchor_urb(cmdinfo->cmd_urb, &devinfo->cmd_urbs);
+ err = usb_submit_urb(cmdinfo->cmd_urb, gfp);
+ if (err) {
+ usb_unanchor_urb(cmdinfo->cmd_urb);
+ uas_log_cmd_state(cmnd, __func__);
scmd_printk(KERN_INFO, cmnd,
- "cmd urb submission failure\n");
+ "cmd urb submission error %d\n", err);
return SCSI_MLQUEUE_DEVICE_BUSY;
}
- usb_anchor_urb(cmdinfo->cmd_urb, &devinfo->cmd_urbs);
- usb_put_urb(cmdinfo->cmd_urb);
cmdinfo->cmd_urb = NULL;
cmdinfo->state &= ~SUBMIT_CMD_URB;
cmdinfo->state |= COMMAND_INFLIGHT;
@@ -644,18 +714,22 @@ static int uas_queuecommand_lck(struct scsi_cmnd *cmnd,
BUILD_BUG_ON(sizeof(struct uas_cmd_info) > sizeof(struct scsi_pointer));
+ spin_lock_irqsave(&devinfo->lock, flags);
+
if (devinfo->resetting) {
cmnd->result = DID_ERROR << 16;
cmnd->scsi_done(cmnd);
+ spin_unlock_irqrestore(&devinfo->lock, flags);
return 0;
}
- spin_lock_irqsave(&devinfo->lock, flags);
if (devinfo->cmnd) {
spin_unlock_irqrestore(&devinfo->lock, flags);
return SCSI_MLQUEUE_DEVICE_BUSY;
}
+ memset(cmdinfo, 0, sizeof(*cmdinfo));
+
if (blk_rq_tagged(cmnd->request)) {
cmdinfo->stream = cmnd->request->tag + 2;
} else {
@@ -692,13 +766,10 @@ static int uas_queuecommand_lck(struct scsi_cmnd *cmnd,
spin_unlock_irqrestore(&devinfo->lock, flags);
return SCSI_MLQUEUE_DEVICE_BUSY;
}
- spin_lock(&uas_work_lock);
- list_add_tail(&cmdinfo->list, &uas_work_list);
- cmdinfo->state |= IS_IN_WORK_LIST;
- spin_unlock(&uas_work_lock);
- schedule_work(&uas_work);
+ uas_add_work(cmdinfo);
}
+ list_add_tail(&cmdinfo->list, &devinfo->inflight_list);
spin_unlock_irqrestore(&devinfo->lock, flags);
return 0;
}
@@ -709,46 +780,78 @@ static int uas_eh_task_mgmt(struct scsi_cmnd *cmnd,
const char *fname, u8 function)
{
struct Scsi_Host *shost = cmnd->device->host;
- struct uas_dev_info *devinfo = (void *)shost->hostdata[0];
- u16 tag = devinfo->qdepth - 1;
+ struct uas_dev_info *devinfo = (struct uas_dev_info *)shost->hostdata;
+ u16 tag = devinfo->qdepth;
unsigned long flags;
+ struct urb *sense_urb;
+ int result = SUCCESS;
spin_lock_irqsave(&devinfo->lock, flags);
+
+ if (devinfo->resetting) {
+ spin_unlock_irqrestore(&devinfo->lock, flags);
+ return FAILED;
+ }
+
+ if (devinfo->running_task) {
+ shost_printk(KERN_INFO, shost,
+ "%s: %s: error already running a task\n",
+ __func__, fname);
+ spin_unlock_irqrestore(&devinfo->lock, flags);
+ return FAILED;
+ }
+
+ devinfo->running_task = 1;
memset(&devinfo->response, 0, sizeof(devinfo->response));
- if (uas_submit_sense_urb(shost, GFP_ATOMIC, tag)) {
+ sense_urb = uas_submit_sense_urb(cmnd, GFP_NOIO,
+ devinfo->use_streams ? tag : 0);
+ if (!sense_urb) {
shost_printk(KERN_INFO, shost,
"%s: %s: submit sense urb failed\n",
__func__, fname);
+ devinfo->running_task = 0;
spin_unlock_irqrestore(&devinfo->lock, flags);
return FAILED;
}
- if (uas_submit_task_urb(cmnd, GFP_ATOMIC, function, tag)) {
+ if (uas_submit_task_urb(cmnd, GFP_NOIO, function, tag)) {
shost_printk(KERN_INFO, shost,
"%s: %s: submit task mgmt urb failed\n",
__func__, fname);
+ devinfo->running_task = 0;
spin_unlock_irqrestore(&devinfo->lock, flags);
+ usb_kill_urb(sense_urb);
return FAILED;
}
spin_unlock_irqrestore(&devinfo->lock, flags);
if (usb_wait_anchor_empty_timeout(&devinfo->sense_urbs, 3000) == 0) {
+ /*
+ * Note we deliberately do not clear running_task here. If we
+ * allow new tasks to be submitted, there is no way to figure
+ * out if a received response_iu is for the failed task or for
+ * the new one. A bus-reset will eventually clear running_task.
+ */
shost_printk(KERN_INFO, shost,
"%s: %s timed out\n", __func__, fname);
return FAILED;
}
+
+ spin_lock_irqsave(&devinfo->lock, flags);
+ devinfo->running_task = 0;
if (be16_to_cpu(devinfo->response.tag) != tag) {
shost_printk(KERN_INFO, shost,
"%s: %s failed (wrong tag %d/%d)\n", __func__,
fname, be16_to_cpu(devinfo->response.tag), tag);
- return FAILED;
- }
- if (devinfo->response.response_code != RC_TMF_COMPLETE) {
+ result = FAILED;
+ } else if (devinfo->response.response_code != RC_TMF_COMPLETE) {
shost_printk(KERN_INFO, shost,
"%s: %s failed (rc 0x%x)\n", __func__,
fname, devinfo->response.response_code);
- return FAILED;
+ result = FAILED;
}
- return SUCCESS;
+ spin_unlock_irqrestore(&devinfo->lock, flags);
+
+ return result;
}
static int uas_eh_abort_handler(struct scsi_cmnd *cmnd)
@@ -758,22 +861,19 @@ static int uas_eh_abort_handler(struct scsi_cmnd *cmnd)
unsigned long flags;
int ret;
- uas_log_cmd_state(cmnd, __func__);
spin_lock_irqsave(&devinfo->lock, flags);
- cmdinfo->state |= COMMAND_ABORTED;
- if (cmdinfo->state & IS_IN_WORK_LIST) {
- spin_lock(&uas_work_lock);
- list_del(&cmdinfo->list);
- cmdinfo->state &= ~IS_IN_WORK_LIST;
- spin_unlock(&uas_work_lock);
+
+ if (devinfo->resetting) {
+ spin_unlock_irqrestore(&devinfo->lock, flags);
+ return FAILED;
}
+
+ uas_mark_cmd_dead(devinfo, cmdinfo, DID_ABORT, __func__);
if (cmdinfo->state & COMMAND_INFLIGHT) {
spin_unlock_irqrestore(&devinfo->lock, flags);
ret = uas_eh_task_mgmt(cmnd, "ABORT TASK", TMF_ABORT_TASK);
} else {
- spin_unlock_irqrestore(&devinfo->lock, flags);
- uas_unlink_data_urbs(devinfo, cmdinfo);
- spin_lock_irqsave(&devinfo->lock, flags);
+ uas_unlink_data_urbs(devinfo, cmdinfo, &flags);
uas_try_complete(cmnd, __func__);
spin_unlock_irqrestore(&devinfo->lock, flags);
ret = SUCCESS;
@@ -795,14 +895,25 @@ static int uas_eh_bus_reset_handler(struct scsi_cmnd *cmnd)
struct usb_device *udev = devinfo->udev;
int err;
+ err = usb_lock_device_for_reset(udev, devinfo->intf);
+ if (err) {
+ shost_printk(KERN_ERR, sdev->host,
+ "%s FAILED to get lock err %d\n", __func__, err);
+ return FAILED;
+ }
+
+ shost_printk(KERN_INFO, sdev->host, "%s start\n", __func__);
devinfo->resetting = 1;
- uas_abort_work(devinfo);
+ uas_abort_inflight(devinfo, DID_RESET, __func__);
usb_kill_anchored_urbs(&devinfo->cmd_urbs);
usb_kill_anchored_urbs(&devinfo->sense_urbs);
usb_kill_anchored_urbs(&devinfo->data_urbs);
+ uas_zap_dead(devinfo);
err = usb_reset_device(udev);
devinfo->resetting = 0;
+ usb_unlock_device(udev);
+
if (err) {
shost_printk(KERN_INFO, sdev->host, "%s FAILED\n", __func__);
return FAILED;
@@ -814,7 +925,25 @@ static int uas_eh_bus_reset_handler(struct scsi_cmnd *cmnd)
static int uas_slave_alloc(struct scsi_device *sdev)
{
- sdev->hostdata = (void *)sdev->host->hostdata[0];
+ sdev->hostdata = (void *)sdev->host->hostdata;
+
+ /* USB has unusual DMA-alignment requirements: Although the
+ * starting address of each scatter-gather element doesn't matter,
+ * the length of each element except the last must be divisible
+ * by the Bulk maxpacket value. There's currently no way to
+ * express this by block-layer constraints, so we'll cop out
+ * and simply require addresses to be aligned at 512-byte
+ * boundaries. This is okay since most block I/O involves
+ * hardware sectors that are multiples of 512 bytes in length,
+ * and since host controllers up through USB 2.0 have maxpacket
+ * values no larger than 512.
+ *
+ * But it doesn't suffice for Wireless USB, where Bulk maxpacket
+ * values can be as large as 2048. To make that work properly
+ * will require changes to the block layer.
+ */
+ blk_queue_update_dma_alignment(sdev->request_queue, (512 - 1));
+
return 0;
}
@@ -822,7 +951,7 @@ static int uas_slave_configure(struct scsi_device *sdev)
{
struct uas_dev_info *devinfo = sdev->hostdata;
scsi_set_tag_type(sdev, MSG_ORDERED_TAG);
- scsi_activate_tcq(sdev, devinfo->qdepth - 3);
+ scsi_activate_tcq(sdev, devinfo->qdepth - 2);
return 0;
}
@@ -843,7 +972,14 @@ static struct scsi_host_template uas_host_template = {
.ordered_tag = 1,
};
+#define UNUSUAL_DEV(id_vendor, id_product, bcdDeviceMin, bcdDeviceMax, \
+ vendorName, productName, useProtocol, useTransport, \
+ initFunction, flags) \
+{ USB_DEVICE_VER(id_vendor, id_product, bcdDeviceMin, bcdDeviceMax), \
+ .driver_info = (flags) }
+
static struct usb_device_id uas_usb_ids[] = {
+# include "unusual_uas.h"
{ USB_INTERFACE_INFO(USB_CLASS_MASS_STORAGE, USB_SC_SCSI, USB_PR_BULK) },
{ USB_INTERFACE_INFO(USB_CLASS_MASS_STORAGE, USB_SC_SCSI, USB_PR_UAS) },
/* 0xaa is a prototype device I happen to have access to */
@@ -852,105 +988,55 @@ static struct usb_device_id uas_usb_ids[] = {
};
MODULE_DEVICE_TABLE(usb, uas_usb_ids);
-static int uas_is_interface(struct usb_host_interface *intf)
-{
- return (intf->desc.bInterfaceClass == USB_CLASS_MASS_STORAGE &&
- intf->desc.bInterfaceSubClass == USB_SC_SCSI &&
- intf->desc.bInterfaceProtocol == USB_PR_UAS);
-}
-
-static int uas_isnt_supported(struct usb_device *udev)
-{
- struct usb_hcd *hcd = bus_to_hcd(udev->bus);
-
- dev_warn(&udev->dev, "The driver for the USB controller %s does not "
- "support scatter-gather which is\n",
- hcd->driver->description);
- dev_warn(&udev->dev, "required by the UAS driver. Please try an"
- "alternative USB controller if you wish to use UAS.\n");
- return -ENODEV;
-}
+#undef UNUSUAL_DEV
static int uas_switch_interface(struct usb_device *udev,
- struct usb_interface *intf)
+ struct usb_interface *intf)
{
- int i;
- int sg_supported = udev->bus->sg_tablesize != 0;
-
- for (i = 0; i < intf->num_altsetting; i++) {
- struct usb_host_interface *alt = &intf->altsetting[i];
-
- if (uas_is_interface(alt)) {
- if (!sg_supported)
- return uas_isnt_supported(udev);
- return usb_set_interface(udev,
- alt->desc.bInterfaceNumber,
- alt->desc.bAlternateSetting);
- }
- }
+ int alt;
+
+ alt = uas_find_uas_alt_setting(intf);
+ if (alt < 0)
+ return alt;
- return -ENODEV;
+ return usb_set_interface(udev,
+ intf->altsetting[0].desc.bInterfaceNumber, alt);
}
-static void uas_configure_endpoints(struct uas_dev_info *devinfo)
+static int uas_configure_endpoints(struct uas_dev_info *devinfo)
{
struct usb_host_endpoint *eps[4] = { };
- struct usb_interface *intf = devinfo->intf;
struct usb_device *udev = devinfo->udev;
- struct usb_host_endpoint *endpoint = intf->cur_altsetting->endpoint;
- unsigned i, n_endpoints = intf->cur_altsetting->desc.bNumEndpoints;
+ int r;
devinfo->uas_sense_old = 0;
devinfo->cmnd = NULL;
- for (i = 0; i < n_endpoints; i++) {
- unsigned char *extra = endpoint[i].extra;
- int len = endpoint[i].extralen;
- while (len > 1) {
- if (extra[1] == USB_DT_PIPE_USAGE) {
- unsigned pipe_id = extra[2];
- if (pipe_id > 0 && pipe_id < 5)
- eps[pipe_id - 1] = &endpoint[i];
- break;
- }
- len -= extra[0];
- extra += extra[0];
- }
- }
+ r = uas_find_endpoints(devinfo->intf->cur_altsetting, eps);
+ if (r)
+ return r;
- /*
- * Assume that if we didn't find a control pipe descriptor, we're
- * using a device with old firmware that happens to be set up like
- * this.
- */
- if (!eps[0]) {
- devinfo->cmd_pipe = usb_sndbulkpipe(udev, 1);
- devinfo->status_pipe = usb_rcvbulkpipe(udev, 1);
- devinfo->data_in_pipe = usb_rcvbulkpipe(udev, 2);
- devinfo->data_out_pipe = usb_sndbulkpipe(udev, 2);
-
- eps[1] = usb_pipe_endpoint(udev, devinfo->status_pipe);
- eps[2] = usb_pipe_endpoint(udev, devinfo->data_in_pipe);
- eps[3] = usb_pipe_endpoint(udev, devinfo->data_out_pipe);
- } else {
- devinfo->cmd_pipe = usb_sndbulkpipe(udev,
- eps[0]->desc.bEndpointAddress);
- devinfo->status_pipe = usb_rcvbulkpipe(udev,
- eps[1]->desc.bEndpointAddress);
- devinfo->data_in_pipe = usb_rcvbulkpipe(udev,
- eps[2]->desc.bEndpointAddress);
- devinfo->data_out_pipe = usb_sndbulkpipe(udev,
- eps[3]->desc.bEndpointAddress);
- }
+ devinfo->cmd_pipe = usb_sndbulkpipe(udev,
+ usb_endpoint_num(&eps[0]->desc));
+ devinfo->status_pipe = usb_rcvbulkpipe(udev,
+ usb_endpoint_num(&eps[1]->desc));
+ devinfo->data_in_pipe = usb_rcvbulkpipe(udev,
+ usb_endpoint_num(&eps[2]->desc));
+ devinfo->data_out_pipe = usb_sndbulkpipe(udev,
+ usb_endpoint_num(&eps[3]->desc));
- devinfo->qdepth = usb_alloc_streams(devinfo->intf, eps + 1, 3, 256,
- GFP_KERNEL);
- if (devinfo->qdepth < 0) {
+ if (udev->speed != USB_SPEED_SUPER) {
devinfo->qdepth = 256;
devinfo->use_streams = 0;
} else {
+ devinfo->qdepth = usb_alloc_streams(devinfo->intf, eps + 1,
+ 3, 256, GFP_KERNEL);
+ if (devinfo->qdepth < 0)
+ return devinfo->qdepth;
devinfo->use_streams = 1;
}
+
+ return 0;
}
static void uas_free_streams(struct uas_dev_info *devinfo)
@@ -964,30 +1050,23 @@ static void uas_free_streams(struct uas_dev_info *devinfo)
usb_free_streams(devinfo->intf, eps, 3, GFP_KERNEL);
}
-/*
- * XXX: What I'd like to do here is register a SCSI host for each USB host in
- * the system. Follow usb-storage's design of registering a SCSI host for
- * each USB device for the moment. Can implement this by walking up the
- * USB hierarchy until we find a USB host.
- */
static int uas_probe(struct usb_interface *intf, const struct usb_device_id *id)
{
- int result;
- struct Scsi_Host *shost;
+ int result = -ENOMEM;
+ struct Scsi_Host *shost = NULL;
struct uas_dev_info *devinfo;
struct usb_device *udev = interface_to_usbdev(intf);
- if (uas_switch_interface(udev, intf))
+ if (!uas_use_uas_driver(intf, id))
return -ENODEV;
- devinfo = kmalloc(sizeof(struct uas_dev_info), GFP_KERNEL);
- if (!devinfo)
- return -ENOMEM;
+ if (uas_switch_interface(udev, intf))
+ return -ENODEV;
- result = -ENOMEM;
- shost = scsi_host_alloc(&uas_host_template, sizeof(void *));
+ shost = scsi_host_alloc(&uas_host_template,
+ sizeof(struct uas_dev_info));
if (!shost)
- goto free;
+ goto set_alt0;
shost->max_cmd_len = 16 + 252;
shost->max_id = 1;
@@ -995,33 +1074,40 @@ static int uas_probe(struct usb_interface *intf, const struct usb_device_id *id)
shost->max_channel = 0;
shost->sg_tablesize = udev->bus->sg_tablesize;
+ devinfo = (struct uas_dev_info *)shost->hostdata;
devinfo->intf = intf;
devinfo->udev = udev;
devinfo->resetting = 0;
+ devinfo->running_task = 0;
+ devinfo->shutdown = 0;
init_usb_anchor(&devinfo->cmd_urbs);
init_usb_anchor(&devinfo->sense_urbs);
init_usb_anchor(&devinfo->data_urbs);
spin_lock_init(&devinfo->lock);
- uas_configure_endpoints(devinfo);
+ INIT_WORK(&devinfo->work, uas_do_work);
+ INIT_LIST_HEAD(&devinfo->inflight_list);
+ INIT_LIST_HEAD(&devinfo->dead_list);
- result = scsi_init_shared_tag_map(shost, devinfo->qdepth - 3);
+ result = uas_configure_endpoints(devinfo);
if (result)
- goto free;
+ goto set_alt0;
- result = scsi_add_host(shost, &intf->dev);
+ result = scsi_init_shared_tag_map(shost, devinfo->qdepth - 2);
if (result)
- goto deconfig_eps;
+ goto free_streams;
- shost->hostdata[0] = (unsigned long)devinfo;
+ result = scsi_add_host(shost, &intf->dev);
+ if (result)
+ goto free_streams;
scsi_scan_host(shost);
usb_set_intfdata(intf, shost);
return result;
-deconfig_eps:
+free_streams:
uas_free_streams(devinfo);
- free:
- kfree(devinfo);
+set_alt0:
+ usb_set_interface(udev, intf->altsetting[0].desc.bInterfaceNumber, 0);
if (shost)
scsi_host_put(shost);
return result;
@@ -1029,45 +1115,146 @@ deconfig_eps:
static int uas_pre_reset(struct usb_interface *intf)
{
-/* XXX: Need to return 1 if it's not our device in error handling */
+ struct Scsi_Host *shost = usb_get_intfdata(intf);
+ struct uas_dev_info *devinfo = (struct uas_dev_info *)shost->hostdata;
+ unsigned long flags;
+
+ if (devinfo->shutdown)
+ return 0;
+
+ /* Block new requests */
+ spin_lock_irqsave(shost->host_lock, flags);
+ scsi_block_requests(shost);
+ spin_unlock_irqrestore(shost->host_lock, flags);
+
+ /* Wait for any pending requests to complete */
+ flush_work(&devinfo->work);
+ if (usb_wait_anchor_empty_timeout(&devinfo->sense_urbs, 5000) == 0) {
+ shost_printk(KERN_ERR, shost, "%s: timed out\n", __func__);
+ return 1;
+ }
+
+ uas_free_streams(devinfo);
+
return 0;
}
static int uas_post_reset(struct usb_interface *intf)
{
-/* XXX: Need to return 1 if it's not our device in error handling */
+ struct Scsi_Host *shost = usb_get_intfdata(intf);
+ struct uas_dev_info *devinfo = (struct uas_dev_info *)shost->hostdata;
+ unsigned long flags;
+
+ if (devinfo->shutdown)
+ return 0;
+
+ if (uas_configure_endpoints(devinfo) != 0) {
+ shost_printk(KERN_ERR, shost,
+ "%s: alloc streams error after reset", __func__);
+ return 1;
+ }
+
+ spin_lock_irqsave(shost->host_lock, flags);
+ scsi_report_bus_reset(shost, 0);
+ spin_unlock_irqrestore(shost->host_lock, flags);
+
+ scsi_unblock_requests(shost);
+
+ return 0;
+}
+
+static int uas_suspend(struct usb_interface *intf, pm_message_t message)
+{
+ struct Scsi_Host *shost = usb_get_intfdata(intf);
+ struct uas_dev_info *devinfo = (struct uas_dev_info *)shost->hostdata;
+
+ /* Wait for any pending requests to complete */
+ flush_work(&devinfo->work);
+ if (usb_wait_anchor_empty_timeout(&devinfo->sense_urbs, 5000) == 0) {
+ shost_printk(KERN_ERR, shost, "%s: timed out\n", __func__);
+ return -ETIME;
+ }
+
+ return 0;
+}
+
+static int uas_resume(struct usb_interface *intf)
+{
+ return 0;
+}
+
+static int uas_reset_resume(struct usb_interface *intf)
+{
+ struct Scsi_Host *shost = usb_get_intfdata(intf);
+ struct uas_dev_info *devinfo = (struct uas_dev_info *)shost->hostdata;
+ unsigned long flags;
+
+ if (uas_configure_endpoints(devinfo) != 0) {
+ shost_printk(KERN_ERR, shost,
+ "%s: alloc streams error after reset", __func__);
+ return -EIO;
+ }
+
+ spin_lock_irqsave(shost->host_lock, flags);
+ scsi_report_bus_reset(shost, 0);
+ spin_unlock_irqrestore(shost->host_lock, flags);
+
return 0;
}
static void uas_disconnect(struct usb_interface *intf)
{
struct Scsi_Host *shost = usb_get_intfdata(intf);
- struct uas_dev_info *devinfo = (void *)shost->hostdata[0];
+ struct uas_dev_info *devinfo = (struct uas_dev_info *)shost->hostdata;
devinfo->resetting = 1;
- uas_abort_work(devinfo);
+ cancel_work_sync(&devinfo->work);
+ uas_abort_inflight(devinfo, DID_NO_CONNECT, __func__);
usb_kill_anchored_urbs(&devinfo->cmd_urbs);
usb_kill_anchored_urbs(&devinfo->sense_urbs);
usb_kill_anchored_urbs(&devinfo->data_urbs);
+ uas_zap_dead(devinfo);
scsi_remove_host(shost);
uas_free_streams(devinfo);
- kfree(devinfo);
+ scsi_host_put(shost);
}
/*
- * XXX: Should this plug into libusual so we can auto-upgrade devices from
- * Bulk-Only to UAS?
+ * Put the device back in usb-storage mode on shutdown, as some BIOS-es
+ * hang on reboot when the device is still in uas mode. Note the reset is
+ * necessary as some devices won't revert to usb-storage mode without it.
*/
+static void uas_shutdown(struct device *dev)
+{
+ struct usb_interface *intf = to_usb_interface(dev);
+ struct usb_device *udev = interface_to_usbdev(intf);
+ struct Scsi_Host *shost = usb_get_intfdata(intf);
+ struct uas_dev_info *devinfo = (struct uas_dev_info *)shost->hostdata;
+
+ if (system_state != SYSTEM_RESTART)
+ return;
+
+ devinfo->shutdown = 1;
+ uas_free_streams(devinfo);
+ usb_set_interface(udev, intf->altsetting[0].desc.bInterfaceNumber, 0);
+ usb_reset_device(udev);
+}
+
static struct usb_driver uas_driver = {
.name = "uas",
.probe = uas_probe,
.disconnect = uas_disconnect,
.pre_reset = uas_pre_reset,
.post_reset = uas_post_reset,
+ .suspend = uas_suspend,
+ .resume = uas_resume,
+ .reset_resume = uas_reset_resume,
+ .drvwrap.driver.shutdown = uas_shutdown,
.id_table = uas_usb_ids,
};
module_usb_driver(uas_driver);
MODULE_LICENSE("GPL");
-MODULE_AUTHOR("Matthew Wilcox and Sarah Sharp");
+MODULE_AUTHOR(
+ "Hans de Goede <hdegoede@redhat.com>, Matthew Wilcox and Sarah Sharp");
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-28 21:07:22 +0000