Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 1 | /* |
| 2 | * USB Attached SCSI |
| 3 | * Note that this is not the same as the USB Mass Storage driver |
| 4 | * |
| 5 | * Copyright Matthew Wilcox for Intel Corp, 2010 |
| 6 | * Copyright Sarah Sharp for Intel Corp, 2010 |
| 7 | * |
| 8 | * Distributed under the terms of the GNU GPL, version two. |
| 9 | */ |
| 10 | |
| 11 | #include <linux/blkdev.h> |
| 12 | #include <linux/slab.h> |
| 13 | #include <linux/types.h> |
Paul Gortmaker | 6eb0de8 | 2011-07-03 16:09:31 -0400 | [diff] [blame] | 14 | #include <linux/module.h> |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 15 | #include <linux/usb.h> |
Sebastian Andrzej Siewior | c898add | 2012-01-11 12:42:32 +0100 | [diff] [blame] | 16 | #include <linux/usb/hcd.h> |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 17 | #include <linux/usb/storage.h> |
Sebastian Andrzej Siewior | 348748b | 2012-01-11 12:45:56 +0100 | [diff] [blame] | 18 | #include <linux/usb/uas.h> |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 19 | |
| 20 | #include <scsi/scsi.h> |
| 21 | #include <scsi/scsi_dbg.h> |
| 22 | #include <scsi/scsi_cmnd.h> |
| 23 | #include <scsi/scsi_device.h> |
| 24 | #include <scsi/scsi_host.h> |
| 25 | #include <scsi/scsi_tcq.h> |
| 26 | |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 27 | /* |
| 28 | * The r00-r01c specs define this version of the SENSE IU data structure. |
| 29 | * It's still in use by several different firmware releases. |
| 30 | */ |
| 31 | struct sense_iu_old { |
| 32 | __u8 iu_id; |
| 33 | __u8 rsvd1; |
| 34 | __be16 tag; |
| 35 | __be16 len; |
| 36 | __u8 status; |
| 37 | __u8 service_response; |
| 38 | __u8 sense[SCSI_SENSE_BUFFERSIZE]; |
| 39 | }; |
| 40 | |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 41 | struct uas_dev_info { |
| 42 | struct usb_interface *intf; |
| 43 | struct usb_device *udev; |
Gerd Hoffmann | bdd000f | 2012-06-19 09:54:53 +0200 | [diff] [blame^] | 44 | struct usb_anchor sense_urbs; |
| 45 | struct usb_anchor data_urbs; |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 46 | int qdepth; |
| 47 | unsigned cmd_pipe, status_pipe, data_in_pipe, data_out_pipe; |
| 48 | unsigned use_streams:1; |
| 49 | unsigned uas_sense_old:1; |
Sebastian Andrzej Siewior | 22188f4 | 2011-12-19 20:22:39 +0100 | [diff] [blame] | 50 | struct scsi_cmnd *cmnd; |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 51 | }; |
| 52 | |
| 53 | enum { |
Matthew Wilcox | 92a3f76 | 2010-12-15 15:44:04 -0500 | [diff] [blame] | 54 | SUBMIT_STATUS_URB = (1 << 1), |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 55 | ALLOC_DATA_IN_URB = (1 << 2), |
| 56 | SUBMIT_DATA_IN_URB = (1 << 3), |
| 57 | ALLOC_DATA_OUT_URB = (1 << 4), |
| 58 | SUBMIT_DATA_OUT_URB = (1 << 5), |
| 59 | ALLOC_CMD_URB = (1 << 6), |
| 60 | SUBMIT_CMD_URB = (1 << 7), |
Gerd Hoffmann | b1d6769 | 2012-06-19 09:54:51 +0200 | [diff] [blame] | 61 | COMMAND_INFLIGHT = (1 << 8), |
| 62 | DATA_IN_URB_INFLIGHT = (1 << 9), |
| 63 | DATA_OUT_URB_INFLIGHT = (1 << 10), |
| 64 | COMMAND_COMPLETED = (1 << 11), |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 65 | }; |
| 66 | |
| 67 | /* Overrides scsi_pointer */ |
| 68 | struct uas_cmd_info { |
| 69 | unsigned int state; |
| 70 | unsigned int stream; |
| 71 | struct urb *cmd_urb; |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 72 | struct urb *data_in_urb; |
| 73 | struct urb *data_out_urb; |
| 74 | struct list_head list; |
| 75 | }; |
| 76 | |
| 77 | /* I hate forward declarations, but I actually have a loop */ |
| 78 | static int uas_submit_urbs(struct scsi_cmnd *cmnd, |
| 79 | struct uas_dev_info *devinfo, gfp_t gfp); |
Sarah Sharp | ea9da1c | 2011-12-02 11:55:44 -0800 | [diff] [blame] | 80 | static void uas_do_work(struct work_struct *work); |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 81 | |
Sarah Sharp | ea9da1c | 2011-12-02 11:55:44 -0800 | [diff] [blame] | 82 | static DECLARE_WORK(uas_work, uas_do_work); |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 83 | static DEFINE_SPINLOCK(uas_work_lock); |
| 84 | static LIST_HEAD(uas_work_list); |
| 85 | |
| 86 | static void uas_do_work(struct work_struct *work) |
| 87 | { |
| 88 | struct uas_cmd_info *cmdinfo; |
Sarah Sharp | ea9da1c | 2011-12-02 11:55:44 -0800 | [diff] [blame] | 89 | struct uas_cmd_info *temp; |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 90 | struct list_head list; |
Sarah Sharp | ea9da1c | 2011-12-02 11:55:44 -0800 | [diff] [blame] | 91 | int err; |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 92 | |
| 93 | spin_lock_irq(&uas_work_lock); |
| 94 | list_replace_init(&uas_work_list, &list); |
| 95 | spin_unlock_irq(&uas_work_lock); |
| 96 | |
Sarah Sharp | ea9da1c | 2011-12-02 11:55:44 -0800 | [diff] [blame] | 97 | list_for_each_entry_safe(cmdinfo, temp, &list, list) { |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 98 | struct scsi_pointer *scp = (void *)cmdinfo; |
| 99 | struct scsi_cmnd *cmnd = container_of(scp, |
| 100 | struct scsi_cmnd, SCp); |
Sarah Sharp | ea9da1c | 2011-12-02 11:55:44 -0800 | [diff] [blame] | 101 | err = uas_submit_urbs(cmnd, cmnd->device->hostdata, GFP_NOIO); |
| 102 | if (err) { |
| 103 | list_del(&cmdinfo->list); |
| 104 | spin_lock_irq(&uas_work_lock); |
| 105 | list_add_tail(&cmdinfo->list, &uas_work_list); |
| 106 | spin_unlock_irq(&uas_work_lock); |
| 107 | schedule_work(&uas_work); |
| 108 | } |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 109 | } |
| 110 | } |
| 111 | |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 112 | static void uas_sense(struct urb *urb, struct scsi_cmnd *cmnd) |
| 113 | { |
| 114 | struct sense_iu *sense_iu = urb->transfer_buffer; |
| 115 | struct scsi_device *sdev = cmnd->device; |
| 116 | |
| 117 | if (urb->actual_length > 16) { |
| 118 | unsigned len = be16_to_cpup(&sense_iu->len); |
| 119 | if (len + 16 != urb->actual_length) { |
| 120 | int newlen = min(len + 16, urb->actual_length) - 16; |
| 121 | if (newlen < 0) |
| 122 | newlen = 0; |
| 123 | sdev_printk(KERN_INFO, sdev, "%s: urb length %d " |
| 124 | "disagrees with IU sense data length %d, " |
| 125 | "using %d bytes of sense data\n", __func__, |
| 126 | urb->actual_length, len, newlen); |
| 127 | len = newlen; |
| 128 | } |
| 129 | memcpy(cmnd->sense_buffer, sense_iu->sense, len); |
| 130 | } |
| 131 | |
| 132 | cmnd->result = sense_iu->status; |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 133 | } |
| 134 | |
| 135 | static void uas_sense_old(struct urb *urb, struct scsi_cmnd *cmnd) |
| 136 | { |
| 137 | struct sense_iu_old *sense_iu = urb->transfer_buffer; |
| 138 | struct scsi_device *sdev = cmnd->device; |
| 139 | |
| 140 | if (urb->actual_length > 8) { |
| 141 | unsigned len = be16_to_cpup(&sense_iu->len) - 2; |
| 142 | if (len + 8 != urb->actual_length) { |
| 143 | int newlen = min(len + 8, urb->actual_length) - 8; |
| 144 | if (newlen < 0) |
| 145 | newlen = 0; |
| 146 | sdev_printk(KERN_INFO, sdev, "%s: urb length %d " |
| 147 | "disagrees with IU sense data length %d, " |
| 148 | "using %d bytes of sense data\n", __func__, |
| 149 | urb->actual_length, len, newlen); |
| 150 | len = newlen; |
| 151 | } |
| 152 | memcpy(cmnd->sense_buffer, sense_iu->sense, len); |
| 153 | } |
| 154 | |
| 155 | cmnd->result = sense_iu->status; |
Gerd Hoffmann | b1d6769 | 2012-06-19 09:54:51 +0200 | [diff] [blame] | 156 | } |
| 157 | |
| 158 | static void uas_log_cmd_state(struct scsi_cmnd *cmnd, const char *caller) |
| 159 | { |
| 160 | struct uas_cmd_info *ci = (void *)&cmnd->SCp; |
| 161 | |
| 162 | scmd_printk(KERN_INFO, cmnd, "%s %p tag %d, inflight:" |
| 163 | "%s%s%s%s%s%s%s%s%s%s%s\n", |
| 164 | caller, cmnd, cmnd->request->tag, |
| 165 | (ci->state & SUBMIT_STATUS_URB) ? " s-st" : "", |
| 166 | (ci->state & ALLOC_DATA_IN_URB) ? " a-in" : "", |
| 167 | (ci->state & SUBMIT_DATA_IN_URB) ? " s-in" : "", |
| 168 | (ci->state & ALLOC_DATA_OUT_URB) ? " a-out" : "", |
| 169 | (ci->state & SUBMIT_DATA_OUT_URB) ? " s-out" : "", |
| 170 | (ci->state & ALLOC_CMD_URB) ? " a-cmd" : "", |
| 171 | (ci->state & SUBMIT_CMD_URB) ? " s-cmd" : "", |
| 172 | (ci->state & COMMAND_INFLIGHT) ? " CMD" : "", |
| 173 | (ci->state & DATA_IN_URB_INFLIGHT) ? " IN" : "", |
| 174 | (ci->state & DATA_OUT_URB_INFLIGHT) ? " OUT" : "", |
| 175 | (ci->state & COMMAND_COMPLETED) ? " done" : ""); |
| 176 | } |
| 177 | |
| 178 | static int uas_try_complete(struct scsi_cmnd *cmnd, const char *caller) |
| 179 | { |
| 180 | struct uas_cmd_info *cmdinfo = (void *)&cmnd->SCp; |
| 181 | |
| 182 | if (cmdinfo->state & (COMMAND_INFLIGHT | |
| 183 | DATA_IN_URB_INFLIGHT | |
| 184 | DATA_OUT_URB_INFLIGHT)) |
| 185 | return -EBUSY; |
| 186 | BUG_ON(cmdinfo->state & COMMAND_COMPLETED); |
| 187 | cmdinfo->state |= COMMAND_COMPLETED; |
| 188 | usb_free_urb(cmdinfo->data_in_urb); |
| 189 | usb_free_urb(cmdinfo->data_out_urb); |
Gerd Hoffmann | c621a81 | 2012-06-19 09:54:48 +0200 | [diff] [blame] | 190 | cmnd->scsi_done(cmnd); |
Gerd Hoffmann | b1d6769 | 2012-06-19 09:54:51 +0200 | [diff] [blame] | 191 | return 0; |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 192 | } |
| 193 | |
| 194 | static void uas_xfer_data(struct urb *urb, struct scsi_cmnd *cmnd, |
Gerd Hoffmann | b1d6769 | 2012-06-19 09:54:51 +0200 | [diff] [blame] | 195 | unsigned direction) |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 196 | { |
| 197 | struct uas_cmd_info *cmdinfo = (void *)&cmnd->SCp; |
| 198 | int err; |
| 199 | |
Gerd Hoffmann | b1d6769 | 2012-06-19 09:54:51 +0200 | [diff] [blame] | 200 | cmdinfo->state |= direction | SUBMIT_STATUS_URB; |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 201 | err = uas_submit_urbs(cmnd, cmnd->device->hostdata, GFP_ATOMIC); |
| 202 | if (err) { |
| 203 | spin_lock(&uas_work_lock); |
| 204 | list_add_tail(&cmdinfo->list, &uas_work_list); |
| 205 | spin_unlock(&uas_work_lock); |
| 206 | schedule_work(&uas_work); |
| 207 | } |
| 208 | } |
| 209 | |
| 210 | static void uas_stat_cmplt(struct urb *urb) |
| 211 | { |
| 212 | struct iu *iu = urb->transfer_buffer; |
Sebastian Andrzej Siewior | 22188f4 | 2011-12-19 20:22:39 +0100 | [diff] [blame] | 213 | struct Scsi_Host *shost = urb->context; |
| 214 | struct uas_dev_info *devinfo = (void *)shost->hostdata[0]; |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 215 | struct scsi_cmnd *cmnd; |
Gerd Hoffmann | b1d6769 | 2012-06-19 09:54:51 +0200 | [diff] [blame] | 216 | struct uas_cmd_info *cmdinfo; |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 217 | u16 tag; |
| 218 | |
| 219 | if (urb->status) { |
| 220 | dev_err(&urb->dev->dev, "URB BAD STATUS %d\n", urb->status); |
Gerd Hoffmann | db32de1 | 2012-06-19 09:54:49 +0200 | [diff] [blame] | 221 | usb_free_urb(urb); |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 222 | return; |
| 223 | } |
| 224 | |
| 225 | tag = be16_to_cpup(&iu->tag) - 1; |
Sebastian Andrzej Siewior | 22188f4 | 2011-12-19 20:22:39 +0100 | [diff] [blame] | 226 | if (tag == 0) |
| 227 | cmnd = devinfo->cmnd; |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 228 | else |
Sebastian Andrzej Siewior | 22188f4 | 2011-12-19 20:22:39 +0100 | [diff] [blame] | 229 | cmnd = scsi_host_find_tag(shost, tag - 1); |
Sarah Sharp | 96c1eb9 | 2011-12-02 11:55:48 -0800 | [diff] [blame] | 230 | if (!cmnd) { |
Gerd Hoffmann | db32de1 | 2012-06-19 09:54:49 +0200 | [diff] [blame] | 231 | usb_free_urb(urb); |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 232 | return; |
Sarah Sharp | 96c1eb9 | 2011-12-02 11:55:48 -0800 | [diff] [blame] | 233 | } |
Gerd Hoffmann | b1d6769 | 2012-06-19 09:54:51 +0200 | [diff] [blame] | 234 | cmdinfo = (void *)&cmnd->SCp; |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 235 | |
| 236 | switch (iu->iu_id) { |
| 237 | case IU_ID_STATUS: |
Sebastian Andrzej Siewior | 22188f4 | 2011-12-19 20:22:39 +0100 | [diff] [blame] | 238 | if (devinfo->cmnd == cmnd) |
| 239 | devinfo->cmnd = NULL; |
| 240 | |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 241 | if (urb->actual_length < 16) |
| 242 | devinfo->uas_sense_old = 1; |
| 243 | if (devinfo->uas_sense_old) |
| 244 | uas_sense_old(urb, cmnd); |
| 245 | else |
| 246 | uas_sense(urb, cmnd); |
Gerd Hoffmann | 8aac863 | 2012-06-19 09:54:52 +0200 | [diff] [blame] | 247 | if (cmnd->result != 0) { |
| 248 | /* cancel data transfers on error */ |
| 249 | if (cmdinfo->state & DATA_IN_URB_INFLIGHT) |
| 250 | usb_unlink_urb(cmdinfo->data_in_urb); |
| 251 | if (cmdinfo->state & DATA_OUT_URB_INFLIGHT) |
| 252 | usb_unlink_urb(cmdinfo->data_out_urb); |
| 253 | } |
Gerd Hoffmann | b1d6769 | 2012-06-19 09:54:51 +0200 | [diff] [blame] | 254 | cmdinfo->state &= ~COMMAND_INFLIGHT; |
| 255 | uas_try_complete(cmnd, __func__); |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 256 | break; |
| 257 | case IU_ID_READ_READY: |
| 258 | uas_xfer_data(urb, cmnd, SUBMIT_DATA_IN_URB); |
| 259 | break; |
| 260 | case IU_ID_WRITE_READY: |
| 261 | uas_xfer_data(urb, cmnd, SUBMIT_DATA_OUT_URB); |
| 262 | break; |
| 263 | default: |
| 264 | scmd_printk(KERN_ERR, cmnd, |
| 265 | "Bogus IU (%d) received on status pipe\n", iu->iu_id); |
| 266 | } |
Gerd Hoffmann | e9bd7e1 | 2012-06-19 09:54:50 +0200 | [diff] [blame] | 267 | usb_free_urb(urb); |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 268 | } |
| 269 | |
Gerd Hoffmann | c621a81 | 2012-06-19 09:54:48 +0200 | [diff] [blame] | 270 | static void uas_data_cmplt(struct urb *urb) |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 271 | { |
Gerd Hoffmann | b1d6769 | 2012-06-19 09:54:51 +0200 | [diff] [blame] | 272 | struct scsi_cmnd *cmnd = urb->context; |
| 273 | struct uas_cmd_info *cmdinfo = (void *)&cmnd->SCp; |
| 274 | struct scsi_data_buffer *sdb = NULL; |
| 275 | |
| 276 | if (cmdinfo->data_in_urb == urb) { |
| 277 | sdb = scsi_in(cmnd); |
| 278 | cmdinfo->state &= ~DATA_IN_URB_INFLIGHT; |
| 279 | } else if (cmdinfo->data_out_urb == urb) { |
| 280 | sdb = scsi_out(cmnd); |
| 281 | cmdinfo->state &= ~DATA_OUT_URB_INFLIGHT; |
| 282 | } |
| 283 | BUG_ON(sdb == NULL); |
Gerd Hoffmann | 8aac863 | 2012-06-19 09:54:52 +0200 | [diff] [blame] | 284 | if (urb->status) { |
| 285 | /* error: no data transfered */ |
| 286 | sdb->resid = sdb->length; |
| 287 | } else { |
| 288 | sdb->resid = sdb->length - urb->actual_length; |
| 289 | } |
Gerd Hoffmann | b1d6769 | 2012-06-19 09:54:51 +0200 | [diff] [blame] | 290 | uas_try_complete(cmnd, __func__); |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 291 | } |
| 292 | |
| 293 | static struct urb *uas_alloc_data_urb(struct uas_dev_info *devinfo, gfp_t gfp, |
Gerd Hoffmann | b1d6769 | 2012-06-19 09:54:51 +0200 | [diff] [blame] | 294 | unsigned int pipe, u16 stream_id, |
| 295 | struct scsi_cmnd *cmnd, |
| 296 | enum dma_data_direction dir) |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 297 | { |
| 298 | struct usb_device *udev = devinfo->udev; |
| 299 | struct urb *urb = usb_alloc_urb(0, gfp); |
Gerd Hoffmann | b1d6769 | 2012-06-19 09:54:51 +0200 | [diff] [blame] | 300 | struct scsi_data_buffer *sdb = (dir == DMA_FROM_DEVICE) |
| 301 | ? scsi_in(cmnd) : scsi_out(cmnd); |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 302 | |
| 303 | if (!urb) |
| 304 | goto out; |
Gerd Hoffmann | b1d6769 | 2012-06-19 09:54:51 +0200 | [diff] [blame] | 305 | usb_fill_bulk_urb(urb, udev, pipe, NULL, sdb->length, |
| 306 | uas_data_cmplt, cmnd); |
Gerd Hoffmann | c621a81 | 2012-06-19 09:54:48 +0200 | [diff] [blame] | 307 | if (devinfo->use_streams) |
| 308 | urb->stream_id = stream_id; |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 309 | urb->num_sgs = udev->bus->sg_tablesize ? sdb->table.nents : 0; |
| 310 | urb->sg = sdb->table.sgl; |
| 311 | out: |
| 312 | return urb; |
| 313 | } |
| 314 | |
| 315 | static struct urb *uas_alloc_sense_urb(struct uas_dev_info *devinfo, gfp_t gfp, |
Gerd Hoffmann | e9bd7e1 | 2012-06-19 09:54:50 +0200 | [diff] [blame] | 316 | struct Scsi_Host *shost, u16 stream_id) |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 317 | { |
| 318 | struct usb_device *udev = devinfo->udev; |
| 319 | struct urb *urb = usb_alloc_urb(0, gfp); |
| 320 | struct sense_iu *iu; |
| 321 | |
| 322 | if (!urb) |
| 323 | goto out; |
| 324 | |
Matthew Wilcox | ac563cf | 2010-12-15 15:44:03 -0500 | [diff] [blame] | 325 | iu = kzalloc(sizeof(*iu), gfp); |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 326 | if (!iu) |
| 327 | goto free; |
| 328 | |
| 329 | usb_fill_bulk_urb(urb, udev, devinfo->status_pipe, iu, sizeof(*iu), |
Gerd Hoffmann | e9bd7e1 | 2012-06-19 09:54:50 +0200 | [diff] [blame] | 330 | uas_stat_cmplt, shost); |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 331 | urb->stream_id = stream_id; |
| 332 | urb->transfer_flags |= URB_FREE_BUFFER; |
| 333 | out: |
| 334 | return urb; |
| 335 | free: |
| 336 | usb_free_urb(urb); |
| 337 | return NULL; |
| 338 | } |
| 339 | |
| 340 | static struct urb *uas_alloc_cmd_urb(struct uas_dev_info *devinfo, gfp_t gfp, |
| 341 | struct scsi_cmnd *cmnd, u16 stream_id) |
| 342 | { |
| 343 | struct usb_device *udev = devinfo->udev; |
| 344 | struct scsi_device *sdev = cmnd->device; |
| 345 | struct urb *urb = usb_alloc_urb(0, gfp); |
| 346 | struct command_iu *iu; |
| 347 | int len; |
| 348 | |
| 349 | if (!urb) |
| 350 | goto out; |
| 351 | |
| 352 | len = cmnd->cmd_len - 16; |
| 353 | if (len < 0) |
| 354 | len = 0; |
| 355 | len = ALIGN(len, 4); |
Matthew Wilcox | ac563cf | 2010-12-15 15:44:03 -0500 | [diff] [blame] | 356 | iu = kzalloc(sizeof(*iu) + len, gfp); |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 357 | if (!iu) |
| 358 | goto free; |
| 359 | |
| 360 | iu->iu_id = IU_ID_COMMAND; |
Sarah Sharp | 9eb4454 | 2011-12-02 11:55:46 -0800 | [diff] [blame] | 361 | if (blk_rq_tagged(cmnd->request)) |
Sebastian Andrzej Siewior | 22188f4 | 2011-12-19 20:22:39 +0100 | [diff] [blame] | 362 | iu->tag = cpu_to_be16(cmnd->request->tag + 2); |
Sarah Sharp | 9eb4454 | 2011-12-02 11:55:46 -0800 | [diff] [blame] | 363 | else |
| 364 | iu->tag = cpu_to_be16(1); |
Christoph Hellwig | 02e031c | 2010-11-10 14:54:09 +0100 | [diff] [blame] | 365 | iu->prio_attr = UAS_SIMPLE_TAG; |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 366 | iu->len = len; |
| 367 | int_to_scsilun(sdev->lun, &iu->lun); |
| 368 | memcpy(iu->cdb, cmnd->cmnd, cmnd->cmd_len); |
| 369 | |
| 370 | usb_fill_bulk_urb(urb, udev, devinfo->cmd_pipe, iu, sizeof(*iu) + len, |
| 371 | usb_free_urb, NULL); |
| 372 | urb->transfer_flags |= URB_FREE_BUFFER; |
| 373 | out: |
| 374 | return urb; |
| 375 | free: |
| 376 | usb_free_urb(urb); |
| 377 | return NULL; |
| 378 | } |
| 379 | |
| 380 | /* |
| 381 | * Why should I request the Status IU before sending the Command IU? Spec |
| 382 | * says to, but also says the device may receive them in any order. Seems |
| 383 | * daft to me. |
| 384 | */ |
| 385 | |
Gerd Hoffmann | e9bd7e1 | 2012-06-19 09:54:50 +0200 | [diff] [blame] | 386 | static int uas_submit_sense_urb(struct Scsi_Host *shost, |
| 387 | gfp_t gfp, unsigned int stream) |
| 388 | { |
| 389 | struct uas_dev_info *devinfo = (void *)shost->hostdata[0]; |
| 390 | struct urb *urb; |
| 391 | |
| 392 | urb = uas_alloc_sense_urb(devinfo, gfp, shost, stream); |
| 393 | if (!urb) |
| 394 | return SCSI_MLQUEUE_DEVICE_BUSY; |
| 395 | if (usb_submit_urb(urb, gfp)) { |
| 396 | shost_printk(KERN_INFO, shost, |
| 397 | "sense urb submission failure\n"); |
| 398 | usb_free_urb(urb); |
| 399 | return SCSI_MLQUEUE_DEVICE_BUSY; |
| 400 | } |
Gerd Hoffmann | bdd000f | 2012-06-19 09:54:53 +0200 | [diff] [blame^] | 401 | usb_anchor_urb(urb, &devinfo->sense_urbs); |
Gerd Hoffmann | e9bd7e1 | 2012-06-19 09:54:50 +0200 | [diff] [blame] | 402 | return 0; |
| 403 | } |
| 404 | |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 405 | static int uas_submit_urbs(struct scsi_cmnd *cmnd, |
Gerd Hoffmann | e9bd7e1 | 2012-06-19 09:54:50 +0200 | [diff] [blame] | 406 | struct uas_dev_info *devinfo, gfp_t gfp) |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 407 | { |
| 408 | struct uas_cmd_info *cmdinfo = (void *)&cmnd->SCp; |
Gerd Hoffmann | e9bd7e1 | 2012-06-19 09:54:50 +0200 | [diff] [blame] | 409 | int err; |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 410 | |
Matthew Wilcox | 92a3f76 | 2010-12-15 15:44:04 -0500 | [diff] [blame] | 411 | if (cmdinfo->state & SUBMIT_STATUS_URB) { |
Gerd Hoffmann | e9bd7e1 | 2012-06-19 09:54:50 +0200 | [diff] [blame] | 412 | err = uas_submit_sense_urb(cmnd->device->host, gfp, |
| 413 | cmdinfo->stream); |
| 414 | if (err) { |
| 415 | return err; |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 416 | } |
Matthew Wilcox | 92a3f76 | 2010-12-15 15:44:04 -0500 | [diff] [blame] | 417 | cmdinfo->state &= ~SUBMIT_STATUS_URB; |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 418 | } |
| 419 | |
| 420 | if (cmdinfo->state & ALLOC_DATA_IN_URB) { |
| 421 | cmdinfo->data_in_urb = uas_alloc_data_urb(devinfo, gfp, |
Gerd Hoffmann | c621a81 | 2012-06-19 09:54:48 +0200 | [diff] [blame] | 422 | devinfo->data_in_pipe, cmdinfo->stream, |
Gerd Hoffmann | b1d6769 | 2012-06-19 09:54:51 +0200 | [diff] [blame] | 423 | cmnd, DMA_FROM_DEVICE); |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 424 | if (!cmdinfo->data_in_urb) |
| 425 | return SCSI_MLQUEUE_DEVICE_BUSY; |
| 426 | cmdinfo->state &= ~ALLOC_DATA_IN_URB; |
| 427 | } |
| 428 | |
| 429 | if (cmdinfo->state & SUBMIT_DATA_IN_URB) { |
| 430 | if (usb_submit_urb(cmdinfo->data_in_urb, gfp)) { |
| 431 | scmd_printk(KERN_INFO, cmnd, |
| 432 | "data in urb submission failure\n"); |
| 433 | return SCSI_MLQUEUE_DEVICE_BUSY; |
| 434 | } |
| 435 | cmdinfo->state &= ~SUBMIT_DATA_IN_URB; |
Gerd Hoffmann | b1d6769 | 2012-06-19 09:54:51 +0200 | [diff] [blame] | 436 | cmdinfo->state |= DATA_IN_URB_INFLIGHT; |
Gerd Hoffmann | bdd000f | 2012-06-19 09:54:53 +0200 | [diff] [blame^] | 437 | usb_anchor_urb(cmdinfo->data_in_urb, &devinfo->data_urbs); |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 438 | } |
| 439 | |
| 440 | if (cmdinfo->state & ALLOC_DATA_OUT_URB) { |
| 441 | cmdinfo->data_out_urb = uas_alloc_data_urb(devinfo, gfp, |
Gerd Hoffmann | c621a81 | 2012-06-19 09:54:48 +0200 | [diff] [blame] | 442 | devinfo->data_out_pipe, cmdinfo->stream, |
Gerd Hoffmann | b1d6769 | 2012-06-19 09:54:51 +0200 | [diff] [blame] | 443 | cmnd, DMA_TO_DEVICE); |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 444 | if (!cmdinfo->data_out_urb) |
| 445 | return SCSI_MLQUEUE_DEVICE_BUSY; |
| 446 | cmdinfo->state &= ~ALLOC_DATA_OUT_URB; |
| 447 | } |
| 448 | |
| 449 | if (cmdinfo->state & SUBMIT_DATA_OUT_URB) { |
| 450 | if (usb_submit_urb(cmdinfo->data_out_urb, gfp)) { |
| 451 | scmd_printk(KERN_INFO, cmnd, |
| 452 | "data out urb submission failure\n"); |
| 453 | return SCSI_MLQUEUE_DEVICE_BUSY; |
| 454 | } |
| 455 | cmdinfo->state &= ~SUBMIT_DATA_OUT_URB; |
Gerd Hoffmann | b1d6769 | 2012-06-19 09:54:51 +0200 | [diff] [blame] | 456 | cmdinfo->state |= DATA_OUT_URB_INFLIGHT; |
Gerd Hoffmann | bdd000f | 2012-06-19 09:54:53 +0200 | [diff] [blame^] | 457 | usb_anchor_urb(cmdinfo->data_out_urb, &devinfo->data_urbs); |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 458 | } |
| 459 | |
| 460 | if (cmdinfo->state & ALLOC_CMD_URB) { |
| 461 | cmdinfo->cmd_urb = uas_alloc_cmd_urb(devinfo, gfp, cmnd, |
| 462 | cmdinfo->stream); |
| 463 | if (!cmdinfo->cmd_urb) |
| 464 | return SCSI_MLQUEUE_DEVICE_BUSY; |
| 465 | cmdinfo->state &= ~ALLOC_CMD_URB; |
| 466 | } |
| 467 | |
| 468 | if (cmdinfo->state & SUBMIT_CMD_URB) { |
| 469 | if (usb_submit_urb(cmdinfo->cmd_urb, gfp)) { |
| 470 | scmd_printk(KERN_INFO, cmnd, |
| 471 | "cmd urb submission failure\n"); |
| 472 | return SCSI_MLQUEUE_DEVICE_BUSY; |
| 473 | } |
| 474 | cmdinfo->state &= ~SUBMIT_CMD_URB; |
Gerd Hoffmann | b1d6769 | 2012-06-19 09:54:51 +0200 | [diff] [blame] | 475 | cmdinfo->state |= COMMAND_INFLIGHT; |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 476 | } |
| 477 | |
| 478 | return 0; |
| 479 | } |
| 480 | |
Jeff Garzik | f281233 | 2010-11-16 02:10:29 -0500 | [diff] [blame] | 481 | static int uas_queuecommand_lck(struct scsi_cmnd *cmnd, |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 482 | void (*done)(struct scsi_cmnd *)) |
| 483 | { |
| 484 | struct scsi_device *sdev = cmnd->device; |
| 485 | struct uas_dev_info *devinfo = sdev->hostdata; |
| 486 | struct uas_cmd_info *cmdinfo = (void *)&cmnd->SCp; |
| 487 | int err; |
| 488 | |
| 489 | BUILD_BUG_ON(sizeof(struct uas_cmd_info) > sizeof(struct scsi_pointer)); |
| 490 | |
Sebastian Andrzej Siewior | 22188f4 | 2011-12-19 20:22:39 +0100 | [diff] [blame] | 491 | if (devinfo->cmnd) |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 492 | return SCSI_MLQUEUE_DEVICE_BUSY; |
| 493 | |
| 494 | if (blk_rq_tagged(cmnd->request)) { |
Sebastian Andrzej Siewior | 22188f4 | 2011-12-19 20:22:39 +0100 | [diff] [blame] | 495 | cmdinfo->stream = cmnd->request->tag + 2; |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 496 | } else { |
Sebastian Andrzej Siewior | 22188f4 | 2011-12-19 20:22:39 +0100 | [diff] [blame] | 497 | devinfo->cmnd = cmnd; |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 498 | cmdinfo->stream = 1; |
| 499 | } |
| 500 | |
| 501 | cmnd->scsi_done = done; |
| 502 | |
Gerd Hoffmann | e9bd7e1 | 2012-06-19 09:54:50 +0200 | [diff] [blame] | 503 | cmdinfo->state = SUBMIT_STATUS_URB | |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 504 | ALLOC_CMD_URB | SUBMIT_CMD_URB; |
| 505 | |
| 506 | switch (cmnd->sc_data_direction) { |
| 507 | case DMA_FROM_DEVICE: |
| 508 | cmdinfo->state |= ALLOC_DATA_IN_URB | SUBMIT_DATA_IN_URB; |
| 509 | break; |
| 510 | case DMA_BIDIRECTIONAL: |
| 511 | cmdinfo->state |= ALLOC_DATA_IN_URB | SUBMIT_DATA_IN_URB; |
| 512 | case DMA_TO_DEVICE: |
| 513 | cmdinfo->state |= ALLOC_DATA_OUT_URB | SUBMIT_DATA_OUT_URB; |
| 514 | case DMA_NONE: |
| 515 | break; |
| 516 | } |
| 517 | |
| 518 | if (!devinfo->use_streams) { |
Gerd Hoffmann | db32de1 | 2012-06-19 09:54:49 +0200 | [diff] [blame] | 519 | cmdinfo->state &= ~(SUBMIT_DATA_IN_URB | SUBMIT_DATA_OUT_URB); |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 520 | cmdinfo->stream = 0; |
| 521 | } |
| 522 | |
| 523 | err = uas_submit_urbs(cmnd, devinfo, GFP_ATOMIC); |
| 524 | if (err) { |
| 525 | /* If we did nothing, give up now */ |
Matthew Wilcox | 92a3f76 | 2010-12-15 15:44:04 -0500 | [diff] [blame] | 526 | if (cmdinfo->state & SUBMIT_STATUS_URB) { |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 527 | return SCSI_MLQUEUE_DEVICE_BUSY; |
| 528 | } |
| 529 | spin_lock(&uas_work_lock); |
| 530 | list_add_tail(&cmdinfo->list, &uas_work_list); |
| 531 | spin_unlock(&uas_work_lock); |
| 532 | schedule_work(&uas_work); |
| 533 | } |
| 534 | |
| 535 | return 0; |
| 536 | } |
| 537 | |
Jeff Garzik | f281233 | 2010-11-16 02:10:29 -0500 | [diff] [blame] | 538 | static DEF_SCSI_QCMD(uas_queuecommand) |
| 539 | |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 540 | static int uas_eh_abort_handler(struct scsi_cmnd *cmnd) |
| 541 | { |
Gerd Hoffmann | b1d6769 | 2012-06-19 09:54:51 +0200 | [diff] [blame] | 542 | uas_log_cmd_state(cmnd, __func__); |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 543 | |
| 544 | /* XXX: Send ABORT TASK Task Management command */ |
| 545 | return FAILED; |
| 546 | } |
| 547 | |
| 548 | static int uas_eh_device_reset_handler(struct scsi_cmnd *cmnd) |
| 549 | { |
| 550 | struct scsi_device *sdev = cmnd->device; |
| 551 | sdev_printk(KERN_INFO, sdev, "%s tag %d\n", __func__, |
| 552 | cmnd->request->tag); |
| 553 | |
| 554 | /* XXX: Send LOGICAL UNIT RESET Task Management command */ |
| 555 | return FAILED; |
| 556 | } |
| 557 | |
| 558 | static int uas_eh_target_reset_handler(struct scsi_cmnd *cmnd) |
| 559 | { |
| 560 | struct scsi_device *sdev = cmnd->device; |
| 561 | sdev_printk(KERN_INFO, sdev, "%s tag %d\n", __func__, |
| 562 | cmnd->request->tag); |
| 563 | |
| 564 | /* XXX: Can we reset just the one USB interface? |
| 565 | * Would calling usb_set_interface() have the right effect? |
| 566 | */ |
| 567 | return FAILED; |
| 568 | } |
| 569 | |
| 570 | static int uas_eh_bus_reset_handler(struct scsi_cmnd *cmnd) |
| 571 | { |
| 572 | struct scsi_device *sdev = cmnd->device; |
| 573 | struct uas_dev_info *devinfo = sdev->hostdata; |
| 574 | struct usb_device *udev = devinfo->udev; |
| 575 | |
| 576 | sdev_printk(KERN_INFO, sdev, "%s tag %d\n", __func__, |
| 577 | cmnd->request->tag); |
| 578 | |
| 579 | if (usb_reset_device(udev)) |
| 580 | return SUCCESS; |
| 581 | |
| 582 | return FAILED; |
| 583 | } |
| 584 | |
| 585 | static int uas_slave_alloc(struct scsi_device *sdev) |
| 586 | { |
| 587 | sdev->hostdata = (void *)sdev->host->hostdata[0]; |
| 588 | return 0; |
| 589 | } |
| 590 | |
| 591 | static int uas_slave_configure(struct scsi_device *sdev) |
| 592 | { |
| 593 | struct uas_dev_info *devinfo = sdev->hostdata; |
| 594 | scsi_set_tag_type(sdev, MSG_ORDERED_TAG); |
Sebastian Andrzej Siewior | 22188f4 | 2011-12-19 20:22:39 +0100 | [diff] [blame] | 595 | scsi_activate_tcq(sdev, devinfo->qdepth - 2); |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 596 | return 0; |
| 597 | } |
| 598 | |
| 599 | static struct scsi_host_template uas_host_template = { |
| 600 | .module = THIS_MODULE, |
| 601 | .name = "uas", |
| 602 | .queuecommand = uas_queuecommand, |
| 603 | .slave_alloc = uas_slave_alloc, |
| 604 | .slave_configure = uas_slave_configure, |
| 605 | .eh_abort_handler = uas_eh_abort_handler, |
| 606 | .eh_device_reset_handler = uas_eh_device_reset_handler, |
| 607 | .eh_target_reset_handler = uas_eh_target_reset_handler, |
| 608 | .eh_bus_reset_handler = uas_eh_bus_reset_handler, |
| 609 | .can_queue = 65536, /* Is there a limit on the _host_ ? */ |
| 610 | .this_id = -1, |
| 611 | .sg_tablesize = SG_NONE, |
| 612 | .cmd_per_lun = 1, /* until we override it */ |
| 613 | .skip_settle_delay = 1, |
| 614 | .ordered_tag = 1, |
| 615 | }; |
| 616 | |
| 617 | static struct usb_device_id uas_usb_ids[] = { |
| 618 | { USB_INTERFACE_INFO(USB_CLASS_MASS_STORAGE, USB_SC_SCSI, USB_PR_BULK) }, |
| 619 | { USB_INTERFACE_INFO(USB_CLASS_MASS_STORAGE, USB_SC_SCSI, USB_PR_UAS) }, |
| 620 | /* 0xaa is a prototype device I happen to have access to */ |
| 621 | { USB_INTERFACE_INFO(USB_CLASS_MASS_STORAGE, USB_SC_SCSI, 0xaa) }, |
| 622 | { } |
| 623 | }; |
| 624 | MODULE_DEVICE_TABLE(usb, uas_usb_ids); |
| 625 | |
Matthew Wilcox | 89dc290 | 2010-12-15 15:44:05 -0500 | [diff] [blame] | 626 | static int uas_is_interface(struct usb_host_interface *intf) |
| 627 | { |
| 628 | return (intf->desc.bInterfaceClass == USB_CLASS_MASS_STORAGE && |
| 629 | intf->desc.bInterfaceSubClass == USB_SC_SCSI && |
| 630 | intf->desc.bInterfaceProtocol == USB_PR_UAS); |
| 631 | } |
| 632 | |
Sebastian Andrzej Siewior | c898add | 2012-01-11 12:42:32 +0100 | [diff] [blame] | 633 | static int uas_isnt_supported(struct usb_device *udev) |
| 634 | { |
| 635 | struct usb_hcd *hcd = bus_to_hcd(udev->bus); |
| 636 | |
| 637 | dev_warn(&udev->dev, "The driver for the USB controller %s does not " |
| 638 | "support scatter-gather which is\n", |
| 639 | hcd->driver->description); |
| 640 | dev_warn(&udev->dev, "required by the UAS driver. Please try an" |
| 641 | "alternative USB controller if you wish to use UAS.\n"); |
| 642 | return -ENODEV; |
| 643 | } |
| 644 | |
Matthew Wilcox | 89dc290 | 2010-12-15 15:44:05 -0500 | [diff] [blame] | 645 | static int uas_switch_interface(struct usb_device *udev, |
| 646 | struct usb_interface *intf) |
| 647 | { |
| 648 | int i; |
Sebastian Andrzej Siewior | c898add | 2012-01-11 12:42:32 +0100 | [diff] [blame] | 649 | int sg_supported = udev->bus->sg_tablesize != 0; |
Matthew Wilcox | 89dc290 | 2010-12-15 15:44:05 -0500 | [diff] [blame] | 650 | |
| 651 | for (i = 0; i < intf->num_altsetting; i++) { |
| 652 | struct usb_host_interface *alt = &intf->altsetting[i]; |
Sebastian Andrzej Siewior | c898add | 2012-01-11 12:42:32 +0100 | [diff] [blame] | 653 | |
| 654 | if (uas_is_interface(alt)) { |
| 655 | if (!sg_supported) |
| 656 | return uas_isnt_supported(udev); |
Matthew Wilcox | 89dc290 | 2010-12-15 15:44:05 -0500 | [diff] [blame] | 657 | return usb_set_interface(udev, |
| 658 | alt->desc.bInterfaceNumber, |
| 659 | alt->desc.bAlternateSetting); |
Sebastian Andrzej Siewior | c898add | 2012-01-11 12:42:32 +0100 | [diff] [blame] | 660 | } |
Matthew Wilcox | 89dc290 | 2010-12-15 15:44:05 -0500 | [diff] [blame] | 661 | } |
| 662 | |
| 663 | return -ENODEV; |
| 664 | } |
| 665 | |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 666 | static void uas_configure_endpoints(struct uas_dev_info *devinfo) |
| 667 | { |
| 668 | struct usb_host_endpoint *eps[4] = { }; |
| 669 | struct usb_interface *intf = devinfo->intf; |
| 670 | struct usb_device *udev = devinfo->udev; |
| 671 | struct usb_host_endpoint *endpoint = intf->cur_altsetting->endpoint; |
| 672 | unsigned i, n_endpoints = intf->cur_altsetting->desc.bNumEndpoints; |
| 673 | |
| 674 | devinfo->uas_sense_old = 0; |
Sebastian Andrzej Siewior | 22188f4 | 2011-12-19 20:22:39 +0100 | [diff] [blame] | 675 | devinfo->cmnd = NULL; |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 676 | |
| 677 | for (i = 0; i < n_endpoints; i++) { |
| 678 | unsigned char *extra = endpoint[i].extra; |
| 679 | int len = endpoint[i].extralen; |
| 680 | while (len > 1) { |
| 681 | if (extra[1] == USB_DT_PIPE_USAGE) { |
| 682 | unsigned pipe_id = extra[2]; |
| 683 | if (pipe_id > 0 && pipe_id < 5) |
| 684 | eps[pipe_id - 1] = &endpoint[i]; |
| 685 | break; |
| 686 | } |
| 687 | len -= extra[0]; |
| 688 | extra += extra[0]; |
| 689 | } |
| 690 | } |
| 691 | |
| 692 | /* |
| 693 | * Assume that if we didn't find a control pipe descriptor, we're |
| 694 | * using a device with old firmware that happens to be set up like |
| 695 | * this. |
| 696 | */ |
| 697 | if (!eps[0]) { |
| 698 | devinfo->cmd_pipe = usb_sndbulkpipe(udev, 1); |
| 699 | devinfo->status_pipe = usb_rcvbulkpipe(udev, 1); |
| 700 | devinfo->data_in_pipe = usb_rcvbulkpipe(udev, 2); |
| 701 | devinfo->data_out_pipe = usb_sndbulkpipe(udev, 2); |
| 702 | |
| 703 | eps[1] = usb_pipe_endpoint(udev, devinfo->status_pipe); |
| 704 | eps[2] = usb_pipe_endpoint(udev, devinfo->data_in_pipe); |
| 705 | eps[3] = usb_pipe_endpoint(udev, devinfo->data_out_pipe); |
| 706 | } else { |
| 707 | devinfo->cmd_pipe = usb_sndbulkpipe(udev, |
| 708 | eps[0]->desc.bEndpointAddress); |
| 709 | devinfo->status_pipe = usb_rcvbulkpipe(udev, |
| 710 | eps[1]->desc.bEndpointAddress); |
| 711 | devinfo->data_in_pipe = usb_rcvbulkpipe(udev, |
| 712 | eps[2]->desc.bEndpointAddress); |
| 713 | devinfo->data_out_pipe = usb_sndbulkpipe(udev, |
| 714 | eps[3]->desc.bEndpointAddress); |
| 715 | } |
| 716 | |
| 717 | devinfo->qdepth = usb_alloc_streams(devinfo->intf, eps + 1, 3, 256, |
| 718 | GFP_KERNEL); |
| 719 | if (devinfo->qdepth < 0) { |
| 720 | devinfo->qdepth = 256; |
| 721 | devinfo->use_streams = 0; |
| 722 | } else { |
| 723 | devinfo->use_streams = 1; |
| 724 | } |
| 725 | } |
| 726 | |
Sebastian Andrzej Siewior | dae5154 | 2011-12-19 17:06:08 +0100 | [diff] [blame] | 727 | static void uas_free_streams(struct uas_dev_info *devinfo) |
| 728 | { |
| 729 | struct usb_device *udev = devinfo->udev; |
| 730 | struct usb_host_endpoint *eps[3]; |
| 731 | |
| 732 | eps[0] = usb_pipe_endpoint(udev, devinfo->status_pipe); |
| 733 | eps[1] = usb_pipe_endpoint(udev, devinfo->data_in_pipe); |
| 734 | eps[2] = usb_pipe_endpoint(udev, devinfo->data_out_pipe); |
| 735 | usb_free_streams(devinfo->intf, eps, 3, GFP_KERNEL); |
| 736 | } |
| 737 | |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 738 | /* |
| 739 | * XXX: What I'd like to do here is register a SCSI host for each USB host in |
| 740 | * the system. Follow usb-storage's design of registering a SCSI host for |
| 741 | * each USB device for the moment. Can implement this by walking up the |
| 742 | * USB hierarchy until we find a USB host. |
| 743 | */ |
| 744 | static int uas_probe(struct usb_interface *intf, const struct usb_device_id *id) |
| 745 | { |
| 746 | int result; |
| 747 | struct Scsi_Host *shost; |
| 748 | struct uas_dev_info *devinfo; |
| 749 | struct usb_device *udev = interface_to_usbdev(intf); |
| 750 | |
Matthew Wilcox | 89dc290 | 2010-12-15 15:44:05 -0500 | [diff] [blame] | 751 | if (uas_switch_interface(udev, intf)) |
| 752 | return -ENODEV; |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 753 | |
| 754 | devinfo = kmalloc(sizeof(struct uas_dev_info), GFP_KERNEL); |
| 755 | if (!devinfo) |
| 756 | return -ENOMEM; |
| 757 | |
| 758 | result = -ENOMEM; |
| 759 | shost = scsi_host_alloc(&uas_host_template, sizeof(void *)); |
| 760 | if (!shost) |
| 761 | goto free; |
| 762 | |
| 763 | shost->max_cmd_len = 16 + 252; |
| 764 | shost->max_id = 1; |
| 765 | shost->sg_tablesize = udev->bus->sg_tablesize; |
| 766 | |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 767 | devinfo->intf = intf; |
| 768 | devinfo->udev = udev; |
Gerd Hoffmann | bdd000f | 2012-06-19 09:54:53 +0200 | [diff] [blame^] | 769 | init_usb_anchor(&devinfo->sense_urbs); |
| 770 | init_usb_anchor(&devinfo->data_urbs); |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 771 | uas_configure_endpoints(devinfo); |
| 772 | |
Sebastian Andrzej Siewior | 22188f4 | 2011-12-19 20:22:39 +0100 | [diff] [blame] | 773 | result = scsi_init_shared_tag_map(shost, devinfo->qdepth - 2); |
Sebastian Andrzej Siewior | dae5154 | 2011-12-19 17:06:08 +0100 | [diff] [blame] | 774 | if (result) |
| 775 | goto free; |
| 776 | |
| 777 | result = scsi_add_host(shost, &intf->dev); |
| 778 | if (result) |
| 779 | goto deconfig_eps; |
| 780 | |
| 781 | shost->hostdata[0] = (unsigned long)devinfo; |
| 782 | |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 783 | scsi_scan_host(shost); |
| 784 | usb_set_intfdata(intf, shost); |
| 785 | return result; |
Sebastian Andrzej Siewior | dae5154 | 2011-12-19 17:06:08 +0100 | [diff] [blame] | 786 | |
| 787 | deconfig_eps: |
| 788 | uas_free_streams(devinfo); |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 789 | free: |
| 790 | kfree(devinfo); |
| 791 | if (shost) |
| 792 | scsi_host_put(shost); |
| 793 | return result; |
| 794 | } |
| 795 | |
| 796 | static int uas_pre_reset(struct usb_interface *intf) |
| 797 | { |
| 798 | /* XXX: Need to return 1 if it's not our device in error handling */ |
| 799 | return 0; |
| 800 | } |
| 801 | |
| 802 | static int uas_post_reset(struct usb_interface *intf) |
| 803 | { |
| 804 | /* XXX: Need to return 1 if it's not our device in error handling */ |
| 805 | return 0; |
| 806 | } |
| 807 | |
| 808 | static void uas_disconnect(struct usb_interface *intf) |
| 809 | { |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 810 | struct Scsi_Host *shost = usb_get_intfdata(intf); |
| 811 | struct uas_dev_info *devinfo = (void *)shost->hostdata[0]; |
| 812 | |
| 813 | scsi_remove_host(shost); |
Gerd Hoffmann | bdd000f | 2012-06-19 09:54:53 +0200 | [diff] [blame^] | 814 | usb_kill_anchored_urbs(&devinfo->sense_urbs); |
| 815 | usb_kill_anchored_urbs(&devinfo->data_urbs); |
Sebastian Andrzej Siewior | dae5154 | 2011-12-19 17:06:08 +0100 | [diff] [blame] | 816 | uas_free_streams(devinfo); |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 817 | kfree(devinfo); |
| 818 | } |
| 819 | |
| 820 | /* |
| 821 | * XXX: Should this plug into libusual so we can auto-upgrade devices from |
| 822 | * Bulk-Only to UAS? |
| 823 | */ |
| 824 | static struct usb_driver uas_driver = { |
| 825 | .name = "uas", |
| 826 | .probe = uas_probe, |
| 827 | .disconnect = uas_disconnect, |
| 828 | .pre_reset = uas_pre_reset, |
| 829 | .post_reset = uas_post_reset, |
| 830 | .id_table = uas_usb_ids, |
| 831 | }; |
| 832 | |
Greg Kroah-Hartman | 65db430 | 2011-11-18 09:34:02 -0800 | [diff] [blame] | 833 | module_usb_driver(uas_driver); |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 834 | |
| 835 | MODULE_LICENSE("GPL"); |
| 836 | MODULE_AUTHOR("Matthew Wilcox and Sarah Sharp"); |