unsigned cmd_pipe, status_pipe, data_in_pipe, data_out_pipe;
unsigned use_streams:1;
unsigned uas_sense_old:1;
+ struct scsi_cmnd *cmnd;
+ struct urb *status_urb; /* used only if stream support is available */
};
enum {
unsigned int state;
unsigned int stream;
struct urb *cmd_urb;
+ /* status_urb is used only if stream support isn't available */
struct urb *status_urb;
struct urb *data_in_urb;
struct urb *data_out_urb;
/* I hate forward declarations, but I actually have a loop */
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 DECLARE_WORK(uas_work, uas_do_work);
static DEFINE_SPINLOCK(uas_work_lock);
static LIST_HEAD(uas_work_list);
static void uas_do_work(struct work_struct *work)
{
struct uas_cmd_info *cmdinfo;
+ struct uas_cmd_info *temp;
struct list_head list;
+ 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(cmdinfo, &list, list) {
+ list_for_each_entry_safe(cmdinfo, temp, &list, list) {
struct scsi_pointer *scp = (void *)cmdinfo;
struct scsi_cmnd *cmnd = container_of(scp,
struct scsi_cmnd, SCp);
- uas_submit_urbs(cmnd, cmnd->device->hostdata, GFP_NOIO);
+ err = uas_submit_urbs(cmnd, cmnd->device->hostdata, GFP_NOIO);
+ 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);
+ }
}
}
- static DECLARE_WORK(uas_work, uas_do_work);
-
static void uas_sense(struct urb *urb, struct scsi_cmnd *cmnd)
{
struct sense_iu *sense_iu = urb->transfer_buffer;
}
cmnd->result = sense_iu->status;
- if (sdev->current_cmnd)
- sdev->current_cmnd = NULL;
cmnd->scsi_done(cmnd);
- usb_free_urb(urb);
}
static void uas_sense_old(struct urb *urb, struct scsi_cmnd *cmnd)
}
cmnd->result = sense_iu->status;
- if (sdev->current_cmnd)
- sdev->current_cmnd = NULL;
cmnd->scsi_done(cmnd);
- usb_free_urb(urb);
}
static void uas_xfer_data(struct urb *urb, struct scsi_cmnd *cmnd,
struct uas_cmd_info *cmdinfo = (void *)&cmnd->SCp;
int err;
- cmdinfo->state = direction | SUBMIT_STATUS_URB;
+ cmdinfo->state = direction;
err = uas_submit_urbs(cmnd, cmnd->device->hostdata, GFP_ATOMIC);
if (err) {
spin_lock(&uas_work_lock);
static void uas_stat_cmplt(struct urb *urb)
{
struct iu *iu = urb->transfer_buffer;
- struct scsi_device *sdev = urb->context;
- struct uas_dev_info *devinfo = sdev->hostdata;
+ struct Scsi_Host *shost = urb->context;
+ struct uas_dev_info *devinfo = (void *)shost->hostdata[0];
struct scsi_cmnd *cmnd;
u16 tag;
+ int ret;
if (urb->status) {
dev_err(&urb->dev->dev, "URB BAD STATUS %d\n", urb->status);
- usb_free_urb(urb);
+ if (devinfo->use_streams)
+ usb_free_urb(urb);
return;
}
tag = be16_to_cpup(&iu->tag) - 1;
- if (sdev->current_cmnd)
- cmnd = sdev->current_cmnd;
+ if (tag == 0)
+ cmnd = devinfo->cmnd;
else
- cmnd = scsi_find_tag(sdev, tag);
- if (!cmnd)
+ cmnd = scsi_host_find_tag(shost, tag - 1);
+ if (!cmnd) {
+ if (devinfo->use_streams) {
+ usb_free_urb(urb);
+ return;
+ }
+ ret = usb_submit_urb(urb, GFP_ATOMIC);
+ if (ret)
+ dev_err(&urb->dev->dev, "failed submit status urb\n");
return;
+ }
switch (iu->iu_id) {
case IU_ID_STATUS:
+ if (devinfo->cmnd == cmnd)
+ devinfo->cmnd = NULL;
+
if (urb->actual_length < 16)
devinfo->uas_sense_old = 1;
if (devinfo->uas_sense_old)
scmd_printk(KERN_ERR, cmnd,
"Bogus IU (%d) received on status pipe\n", iu->iu_id);
}
+
+ if (devinfo->use_streams) {
+ usb_free_urb(urb);
+ return;
+ }
+
+ ret = usb_submit_urb(urb, GFP_ATOMIC);
+ if (ret)
+ dev_err(&urb->dev->dev, "failed submit status urb\n");
}
static void uas_data_cmplt(struct urb *urb)
}
static struct urb *uas_alloc_sense_urb(struct uas_dev_info *devinfo, gfp_t gfp,
- struct scsi_cmnd *cmnd, u16 stream_id)
+ struct Scsi_Host *shost, u16 stream_id)
{
struct usb_device *udev = devinfo->udev;
struct urb *urb = usb_alloc_urb(0, gfp);
goto free;
usb_fill_bulk_urb(urb, udev, devinfo->status_pipe, iu, sizeof(*iu),
- uas_stat_cmplt, cmnd->device);
+ uas_stat_cmplt, shost);
urb->stream_id = stream_id;
urb->transfer_flags |= URB_FREE_BUFFER;
out:
goto free;
iu->iu_id = IU_ID_COMMAND;
- iu->tag = cpu_to_be16(stream_id);
+ if (blk_rq_tagged(cmnd->request))
+ iu->tag = cpu_to_be16(cmnd->request->tag + 2);
+ else
+ iu->tag = cpu_to_be16(1);
iu->prio_attr = UAS_SIMPLE_TAG;
iu->len = len;
int_to_scsilun(sdev->lun, &iu->lun);
struct uas_cmd_info *cmdinfo = (void *)&cmnd->SCp;
if (cmdinfo->state & ALLOC_STATUS_URB) {
- cmdinfo->status_urb = uas_alloc_sense_urb(devinfo, gfp, cmnd,
- cmdinfo->stream);
+ cmdinfo->status_urb = uas_alloc_sense_urb(devinfo, gfp,
+ cmnd->device->host, cmdinfo->stream);
if (!cmdinfo->status_urb)
return SCSI_MLQUEUE_DEVICE_BUSY;
cmdinfo->state &= ~ALLOC_STATUS_URB;
BUILD_BUG_ON(sizeof(struct uas_cmd_info) > sizeof(struct scsi_pointer));
- if (!cmdinfo->status_urb && sdev->current_cmnd)
+ if (devinfo->cmnd)
return SCSI_MLQUEUE_DEVICE_BUSY;
if (blk_rq_tagged(cmnd->request)) {
- cmdinfo->stream = cmnd->request->tag + 1;
+ cmdinfo->stream = cmnd->request->tag + 2;
} else {
- sdev->current_cmnd = cmnd;
+ devinfo->cmnd = cmnd;
cmdinfo->stream = 1;
}
}
if (!devinfo->use_streams) {
- cmdinfo->state &= ~(SUBMIT_DATA_IN_URB | SUBMIT_DATA_OUT_URB);
+ cmdinfo->state &= ~(SUBMIT_DATA_IN_URB | SUBMIT_DATA_OUT_URB |
+ ALLOC_STATUS_URB | SUBMIT_STATUS_URB);
cmdinfo->stream = 0;
}
{
struct uas_dev_info *devinfo = sdev->hostdata;
scsi_set_tag_type(sdev, MSG_ORDERED_TAG);
- scsi_activate_tcq(sdev, devinfo->qdepth - 1);
+ scsi_activate_tcq(sdev, devinfo->qdepth - 2);
return 0;
}
unsigned i, n_endpoints = intf->cur_altsetting->desc.bNumEndpoints;
devinfo->uas_sense_old = 0;
+ devinfo->cmnd = NULL;
for (i = 0; i < n_endpoints; i++) {
unsigned char *extra = endpoint[i].extra;
}
}
+ static int uas_alloc_status_urb(struct uas_dev_info *devinfo,
+ struct Scsi_Host *shost)
+ {
+ if (devinfo->use_streams) {
+ devinfo->status_urb = NULL;
+ return 0;
+ }
+
+ devinfo->status_urb = uas_alloc_sense_urb(devinfo, GFP_KERNEL,
+ shost, 0);
+ if (!devinfo->status_urb)
+ goto err_s_urb;
+
+ if (usb_submit_urb(devinfo->status_urb, GFP_KERNEL))
+ goto err_submit_urb;
+
+ return 0;
+ err_submit_urb:
+ usb_free_urb(devinfo->status_urb);
+ err_s_urb:
+ return -ENOMEM;
+ }
+
+ static void uas_free_streams(struct uas_dev_info *devinfo)
+ {
+ struct usb_device *udev = devinfo->udev;
+ struct usb_host_endpoint *eps[3];
+
+ eps[0] = usb_pipe_endpoint(udev, devinfo->status_pipe);
+ eps[1] = usb_pipe_endpoint(udev, devinfo->data_in_pipe);
+ eps[2] = usb_pipe_endpoint(udev, devinfo->data_out_pipe);
+ 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
shost->max_id = 1;
shost->sg_tablesize = udev->bus->sg_tablesize;
- result = scsi_add_host(shost, &intf->dev);
+ devinfo->intf = intf;
+ devinfo->udev = udev;
+ uas_configure_endpoints(devinfo);
+
+ result = scsi_init_shared_tag_map(shost, devinfo->qdepth - 2);
if (result)
goto free;
+
+ result = scsi_add_host(shost, &intf->dev);
+ if (result)
+ goto deconfig_eps;
+
shost->hostdata[0] = (unsigned long)devinfo;
- devinfo->intf = intf;
- devinfo->udev = udev;
- uas_configure_endpoints(devinfo);
+ result = uas_alloc_status_urb(devinfo, shost);
+ if (result)
+ goto err_alloc_status;
scsi_scan_host(shost);
usb_set_intfdata(intf, shost);
return result;
+
+ err_alloc_status:
+ scsi_remove_host(shost);
+ shost = NULL;
+ deconfig_eps:
+ uas_free_streams(devinfo);
free:
kfree(devinfo);
if (shost)
static void uas_disconnect(struct usb_interface *intf)
{
- struct usb_device *udev = interface_to_usbdev(intf);
- struct usb_host_endpoint *eps[3];
struct Scsi_Host *shost = usb_get_intfdata(intf);
struct uas_dev_info *devinfo = (void *)shost->hostdata[0];
scsi_remove_host(shost);
-
- eps[0] = usb_pipe_endpoint(udev, devinfo->status_pipe);
- eps[1] = usb_pipe_endpoint(udev, devinfo->data_in_pipe);
- eps[2] = usb_pipe_endpoint(udev, devinfo->data_out_pipe);
- usb_free_streams(intf, eps, 3, GFP_KERNEL);
-
+ usb_kill_urb(devinfo->status_urb);
+ usb_free_urb(devinfo->status_urb);
+ uas_free_streams(devinfo);
kfree(devinfo);
}
.id_table = uas_usb_ids,
};
-static int uas_init(void)
-{
- return usb_register(&uas_driver);
-}
-
-static void uas_exit(void)
-{
- usb_deregister(&uas_driver);
-}
-
-module_init(uas_init);
-module_exit(uas_exit);
+module_usb_driver(uas_driver);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Matthew Wilcox and Sarah Sharp");
projects / platform / kernel / linux-rpi.git / commitdiff