drivers/usb/misc/usbtest.c

   1 #include <linux/kernel.h>
   2 #include <linux/errno.h>
   3 #include <linux/init.h>
   4 #include <linux/slab.h>
   5 #include <linux/mm.h>
   6 #include <linux/module.h>
   7 #include <linux/moduleparam.h>
   8 #include <linux/scatterlist.h>
   9 #include <linux/mutex.h>
  10
  11 #include <linux/usb.h>
  12
  13
  14 /*-------------------------------------------------------------------------*/
  15
  16 /* FIXME make these public somewhere; usbdevfs.h? */
  17 struct usbtest_param {
  18         /* inputs */
  19         unsigned                test_num;       /* 0..(TEST_CASES-1) */
  20         unsigned                iterations;
  21         unsigned                length;
  22         unsigned                vary;
  23         unsigned                sglen;
  24
  25         /* outputs */
  26         struct timeval          duration;
  27 };
  28 #define USBTEST_REQUEST _IOWR('U', 100, struct usbtest_param)
  29
  30 /*-------------------------------------------------------------------------*/
  31
  32 #define GENERIC         /* let probe() bind using module params */
  33
  34 /* Some devices that can be used for testing will have "real" drivers.
  35  * Entries for those need to be enabled here by hand, after disabling
  36  * that "real" driver.
  37  */
  38 //#define       IBOT2           /* grab iBOT2 webcams */
  39 //#define       KEYSPAN_19Qi    /* grab un-renumerated serial adapter */
  40
  41 /*-------------------------------------------------------------------------*/
  42
  43 struct usbtest_info {
  44         const char              *name;
  45         u8                      ep_in;          /* bulk/intr source */
  46         u8                      ep_out;         /* bulk/intr sink */
  47         unsigned                autoconf:1;
  48         unsigned                ctrl_out:1;
  49         unsigned                iso:1;          /* try iso in/out */
  50         int                     alt;
  51 };
  52
  53 /* this is accessed only through usbfs ioctl calls.
  54  * one ioctl to issue a test ... one lock per device.
  55  * tests create other threads if they need them.
  56  * urbs and buffers are allocated dynamically,
  57  * and data generated deterministically.
  58  */
  59 struct usbtest_dev {
  60         struct usb_interface    *intf;
  61         struct usbtest_info     *info;
  62         int                     in_pipe;
  63         int                     out_pipe;
  64         int                     in_iso_pipe;
  65         int                     out_iso_pipe;
  66         struct usb_endpoint_descriptor  *iso_in, *iso_out;
  67         struct mutex            lock;
  68
  69 #define TBUF_SIZE       256
  70         u8                      *buf;
  71 };
  72
  73 static struct usb_device *testdev_to_usbdev(struct usbtest_dev *test)
  74 {
  75         return interface_to_usbdev(test->intf);
  76 }
  77
  78 /* set up all urbs so they can be used with either bulk or interrupt */
  79 #define INTERRUPT_RATE          1       /* msec/transfer */
  80
  81 #define ERROR(tdev, fmt, args...) \
  82         dev_err(&(tdev)->intf->dev , fmt , ## args)
  83 #define WARNING(tdev, fmt, args...) \
  84         dev_warn(&(tdev)->intf->dev , fmt , ## args)
  85
  86 #define GUARD_BYTE      0xA5
  87
  88 /*-------------------------------------------------------------------------*/
  89
  90 static int
  91 get_endpoints(struct usbtest_dev *dev, struct usb_interface *intf)
  92 {
  93         int                             tmp;
  94         struct usb_host_interface       *alt;
  95         struct usb_host_endpoint        *in, *out;
  96         struct usb_host_endpoint        *iso_in, *iso_out;
  97         struct usb_device               *udev;
  98
  99         for (tmp = 0; tmp < intf->num_altsetting; tmp++) {
 100                 unsigned        ep;
 101
 102                 in = out = NULL;
 103                 iso_in = iso_out = NULL;
 104                 alt = intf->altsetting + tmp;
 105
 106                 /* take the first altsetting with in-bulk + out-bulk;
 107                  * ignore other endpoints and altsettings.
 108                  */
 109                 for (ep = 0; ep < alt->desc.bNumEndpoints; ep++) {
 110                         struct usb_host_endpoint        *e;
 111
 112                         e = alt->endpoint + ep;
 113                         switch (e->desc.bmAttributes) {
 114                         case USB_ENDPOINT_XFER_BULK:
 115                                 break;
 116                         case USB_ENDPOINT_XFER_ISOC:
 117                                 if (dev->info->iso)
 118                                         goto try_iso;
 119                                 /* FALLTHROUGH */
 120                         default:
 121                                 continue;
 122                         }
 123                         if (usb_endpoint_dir_in(&e->desc)) {
 124                                 if (!in)
 125                                         in = e;
 126                         } else {
 127                                 if (!out)
 128                                         out = e;
 129                         }
 130                         continue;
 131 try_iso:
 132                         if (usb_endpoint_dir_in(&e->desc)) {
 133                                 if (!iso_in)
 134                                         iso_in = e;
 135                         } else {
 136                                 if (!iso_out)
 137                                         iso_out = e;
 138                         }
 139                 }
 140                 if ((in && out)  ||  iso_in || iso_out)
 141                         goto found;
 142         }
 143         return -EINVAL;
 144
 145 found:
 146         udev = testdev_to_usbdev(dev);
 147         if (alt->desc.bAlternateSetting != 0) {
 148                 tmp = usb_set_interface(udev,
 149                                 alt->desc.bInterfaceNumber,
 150                                 alt->desc.bAlternateSetting);
 151                 if (tmp < 0)
 152                         return tmp;
 153         }
 154
 155         if (in) {
 156                 dev->in_pipe = usb_rcvbulkpipe(udev,
 157                         in->desc.bEndpointAddress & USB_ENDPOINT_NUMBER_MASK);
 158                 dev->out_pipe = usb_sndbulkpipe(udev,
 159                         out->desc.bEndpointAddress & USB_ENDPOINT_NUMBER_MASK);
 160         }
 161         if (iso_in) {
 162                 dev->iso_in = &iso_in->desc;
 163                 dev->in_iso_pipe = usb_rcvisocpipe(udev,
 164                                 iso_in->desc.bEndpointAddress
 165                                         & USB_ENDPOINT_NUMBER_MASK);
 166         }
 167
 168         if (iso_out) {
 169                 dev->iso_out = &iso_out->desc;
 170                 dev->out_iso_pipe = usb_sndisocpipe(udev,
 171                                 iso_out->desc.bEndpointAddress
 172                                         & USB_ENDPOINT_NUMBER_MASK);
 173         }
 174         return 0;
 175 }
 176
 177 /*-------------------------------------------------------------------------*/
 178
 179 /* Support for testing basic non-queued I/O streams.
 180  *
 181  * These just package urbs as requests that can be easily canceled.
 182  * Each urb's data buffer is dynamically allocated; callers can fill
 183  * them with non-zero test data (or test for it) when appropriate.
 184  */
 185
 186 static void simple_callback(struct urb *urb)
 187 {
 188         complete(urb->context);
 189 }
 190
 191 static struct urb *usbtest_alloc_urb(
 192         struct usb_device       *udev,
 193         int                     pipe,
 194         unsigned long           bytes,
 195         unsigned                transfer_flags,
 196         unsigned                offset)
 197 {
 198         struct urb              *urb;
 199
 200         urb = usb_alloc_urb(0, GFP_KERNEL);
 201         if (!urb)
 202                 return urb;
 203         usb_fill_bulk_urb(urb, udev, pipe, NULL, bytes, simple_callback, NULL);
 204         urb->interval = (udev->speed == USB_SPEED_HIGH)
 205                         ? (INTERRUPT_RATE << 3)
 206                         : INTERRUPT_RATE;
 207         urb->transfer_flags = transfer_flags;
 208         if (usb_pipein(pipe))
 209                 urb->transfer_flags |= URB_SHORT_NOT_OK;
 210
 211         if (urb->transfer_flags & URB_NO_TRANSFER_DMA_MAP)
 212                 urb->transfer_buffer = usb_alloc_coherent(udev, bytes + offset,
 213                         GFP_KERNEL, &urb->transfer_dma);
 214         else
 215                 urb->transfer_buffer = kmalloc(bytes + offset, GFP_KERNEL);
 216
 217         if (!urb->transfer_buffer) {
 218                 usb_free_urb(urb);
 219                 return NULL;
 220         }
 221
 222         /* To test unaligned transfers add an offset and fill the
 223                 unused memory with a guard value */
 224         if (offset) {
 225                 memset(urb->transfer_buffer, GUARD_BYTE, offset);
 226                 urb->transfer_buffer += offset;
 227                 if (urb->transfer_flags & URB_NO_TRANSFER_DMA_MAP)
 228                         urb->transfer_dma += offset;
 229         }
 230
 231         /* For inbound transfers use guard byte so that test fails if
 232                 data not correctly copied */
 233         memset(urb->transfer_buffer,
 234                         usb_pipein(urb->pipe) ? GUARD_BYTE : 0,
 235                         bytes);
 236         return urb;
 237 }
 238
 239 static struct urb *simple_alloc_urb(
 240         struct usb_device       *udev,
 241         int                     pipe,
 242         unsigned long           bytes)
 243 {
 244         return usbtest_alloc_urb(udev, pipe, bytes, URB_NO_TRANSFER_DMA_MAP, 0);
 245 }
 246
 247 static unsigned pattern;
 248 static unsigned mod_pattern;
 249 module_param_named(pattern, mod_pattern, uint, S_IRUGO | S_IWUSR);
 250 MODULE_PARM_DESC(mod_pattern, "i/o pattern (0 == zeroes)");
 251
 252 static inline void simple_fill_buf(struct urb *urb)
 253 {
 254         unsigned        i;
 255         u8              *buf = urb->transfer_buffer;
 256         unsigned        len = urb->transfer_buffer_length;
 257
 258         switch (pattern) {
 259         default:
 260                 /* FALLTHROUGH */
 261         case 0:
 262                 memset(buf, 0, len);
 263                 break;
 264         case 1:                 /* mod63 */
 265                 for (i = 0; i < len; i++)
 266                         *buf++ = (u8) (i % 63);
 267                 break;
 268         }
 269 }
 270
 271 static inline unsigned long buffer_offset(void *buf)
 272 {
 273         return (unsigned long)buf & (ARCH_KMALLOC_MINALIGN - 1);
 274 }
 275
 276 static int check_guard_bytes(struct usbtest_dev *tdev, struct urb *urb)
 277 {
 278         u8 *buf = urb->transfer_buffer;
 279         u8 *guard = buf - buffer_offset(buf);
 280         unsigned i;
 281
 282         for (i = 0; guard < buf; i++, guard++) {
 283                 if (*guard != GUARD_BYTE) {
 284                         ERROR(tdev, "guard byte[%d] %d (not %d)\n",
 285                                 i, *guard, GUARD_BYTE);
 286                         return -EINVAL;
 287                 }
 288         }
 289         return 0;
 290 }
 291
 292 static int simple_check_buf(struct usbtest_dev *tdev, struct urb *urb)
 293 {
 294         unsigned        i;
 295         u8              expected;
 296         u8              *buf = urb->transfer_buffer;
 297         unsigned        len = urb->actual_length;
 298
 299         int ret = check_guard_bytes(tdev, urb);
 300         if (ret)
 301                 return ret;
 302
 303         for (i = 0; i < len; i++, buf++) {
 304                 switch (pattern) {
 305                 /* all-zeroes has no synchronization issues */
 306                 case 0:
 307                         expected = 0;
 308                         break;
 309                 /* mod63 stays in sync with short-terminated transfers,
 310                  * or otherwise when host and gadget agree on how large
 311                  * each usb transfer request should be.  resync is done
 312                  * with set_interface or set_config.
 313                  */
 314                 case 1:                 /* mod63 */
 315                         expected = i % 63;
 316                         break;
 317                 /* always fail unsupported patterns */
 318                 default:
 319                         expected = !*buf;
 320                         break;
 321                 }
 322                 if (*buf == expected)
 323                         continue;
 324                 ERROR(tdev, "buf[%d] = %d (not %d)\n", i, *buf, expected);
 325                 return -EINVAL;
 326         }
 327         return 0;
 328 }
 329
 330 static void simple_free_urb(struct urb *urb)
 331 {
 332         unsigned long offset = buffer_offset(urb->transfer_buffer);
 333
 334         if (urb->transfer_flags & URB_NO_TRANSFER_DMA_MAP)
 335                 usb_free_coherent(
 336                         urb->dev,
 337                         urb->transfer_buffer_length + offset,
 338                         urb->transfer_buffer - offset,
 339                         urb->transfer_dma - offset);
 340         else
 341                 kfree(urb->transfer_buffer - offset);
 342         usb_free_urb(urb);
 343 }
 344
 345 static int simple_io(
 346         struct usbtest_dev      *tdev,
 347         struct urb              *urb,
 348         int                     iterations,
 349         int                     vary,
 350         int                     expected,
 351         const char              *label
 352 )
 353 {
 354         struct usb_device       *udev = urb->dev;
 355         int                     max = urb->transfer_buffer_length;
 356         struct completion       completion;
 357         int                     retval = 0;
 358
 359         urb->context = &completion;
 360         while (retval == 0 && iterations-- > 0) {
 361                 init_completion(&completion);
 362                 if (usb_pipeout(urb->pipe))
 363                         simple_fill_buf(urb);
 364                 retval = usb_submit_urb(urb, GFP_KERNEL);
 365                 if (retval != 0)
 366                         break;
 367
 368                 /* NOTE:  no timeouts; can't be broken out of by interrupt */
 369                 wait_for_completion(&completion);
 370                 retval = urb->status;
 371                 urb->dev = udev;
 372                 if (retval == 0 && usb_pipein(urb->pipe))
 373                         retval = simple_check_buf(tdev, urb);
 374
 375                 if (vary) {
 376                         int     len = urb->transfer_buffer_length;
 377
 378                         len += vary;
 379                         len %= max;
 380                         if (len == 0)
 381                                 len = (vary < max) ? vary : max;
 382                         urb->transfer_buffer_length = len;
 383                 }
 384
 385                 /* FIXME if endpoint halted, clear halt (and log) */
 386         }
 387         urb->transfer_buffer_length = max;
 388
 389         if (expected != retval)
 390                 dev_err(&udev->dev,
 391                         "%s failed, iterations left %d, status %d (not %d)\n",
 392                                 label, iterations, retval, expected);
 393         return retval;
 394 }
 395
 396
 397 /*-------------------------------------------------------------------------*/
 398
 399 /* We use scatterlist primitives to test queued I/O.
 400  * Yes, this also tests the scatterlist primitives.
 401  */
 402
 403 static void free_sglist(struct scatterlist *sg, int nents)
 404 {
 405         unsigned                i;
 406
 407         if (!sg)
 408                 return;
 409         for (i = 0; i < nents; i++) {
 410                 if (!sg_page(&sg[i]))
 411                         continue;
 412                 kfree(sg_virt(&sg[i]));
 413         }
 414         kfree(sg);
 415 }
 416
 417 static struct scatterlist *
 418 alloc_sglist(int nents, int max, int vary)
 419 {
 420         struct scatterlist      *sg;
 421         unsigned                i;
 422         unsigned                size = max;
 423
 424         sg = kmalloc(nents * sizeof *sg, GFP_KERNEL);
 425         if (!sg)
 426                 return NULL;
 427         sg_init_table(sg, nents);
 428
 429         for (i = 0; i < nents; i++) {
 430                 char            *buf;
 431                 unsigned        j;
 432
 433                 buf = kzalloc(size, GFP_KERNEL);
 434                 if (!buf) {
 435                         free_sglist(sg, i);
 436                         return NULL;
 437                 }
 438
 439                 /* kmalloc pages are always physically contiguous! */
 440                 sg_set_buf(&sg[i], buf, size);
 441
 442                 switch (pattern) {
 443                 case 0:
 444                         /* already zeroed */
 445                         break;
 446                 case 1:
 447                         for (j = 0; j < size; j++)
 448                                 *buf++ = (u8) (j % 63);
 449                         break;
 450                 }
 451
 452                 if (vary) {
 453                         size += vary;
 454                         size %= max;
 455                         if (size == 0)
 456                                 size = (vary < max) ? vary : max;
 457                 }
 458         }
 459
 460         return sg;
 461 }
 462
 463 static int perform_sglist(
 464         struct usbtest_dev      *tdev,
 465         unsigned                iterations,
 466         int                     pipe,
 467         struct usb_sg_request   *req,
 468         struct scatterlist      *sg,
 469         int                     nents
 470 )
 471 {
 472         struct usb_device       *udev = testdev_to_usbdev(tdev);
 473         int                     retval = 0;
 474
 475         while (retval == 0 && iterations-- > 0) {
 476                 retval = usb_sg_init(req, udev, pipe,
 477                                 (udev->speed == USB_SPEED_HIGH)
 478                                         ? (INTERRUPT_RATE << 3)
 479                                         : INTERRUPT_RATE,
 480                                 sg, nents, 0, GFP_KERNEL);
 481
 482                 if (retval)
 483                         break;
 484                 usb_sg_wait(req);
 485                 retval = req->status;
 486
 487                 /* FIXME check resulting data pattern */
 488
 489                 /* FIXME if endpoint halted, clear halt (and log) */
 490         }
 491
 492         /* FIXME for unlink or fault handling tests, don't report
 493          * failure if retval is as we expected ...
 494          */
 495         if (retval)
 496                 ERROR(tdev, "perform_sglist failed, "
 497                                 "iterations left %d, status %d\n",
 498                                 iterations, retval);
 499         return retval;
 500 }
 501
 502
 503 /*-------------------------------------------------------------------------*/
 504
 505 /* unqueued control message testing
 506  *
 507  * there's a nice set of device functional requirements in chapter 9 of the
 508  * usb 2.0 spec, which we can apply to ANY device, even ones that don't use
 509  * special test firmware.
 510  *
 511  * we know the device is configured (or suspended) by the time it's visible
 512  * through usbfs.  we can't change that, so we won't test enumeration (which
 513  * worked 'well enough' to get here, this time), power management (ditto),
 514  * or remote wakeup (which needs human interaction).
 515  */
 516
 517 static unsigned realworld = 1;
 518 module_param(realworld, uint, 0);
 519 MODULE_PARM_DESC(realworld, "clear to demand stricter spec compliance");
 520
 521 static int get_altsetting(struct usbtest_dev *dev)
 522 {
 523         struct usb_interface    *iface = dev->intf;
 524         struct usb_device       *udev = interface_to_usbdev(iface);
 525         int                     retval;
 526
 527         retval = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
 528                         USB_REQ_GET_INTERFACE, USB_DIR_IN|USB_RECIP_INTERFACE,
 529                         0, iface->altsetting[0].desc.bInterfaceNumber,
 530                         dev->buf, 1, USB_CTRL_GET_TIMEOUT);
 531         switch (retval) {
 532         case 1:
 533                 return dev->buf[0];
 534         case 0:
 535                 retval = -ERANGE;
 536                 /* FALLTHROUGH */
 537         default:
 538                 return retval;
 539         }
 540 }
 541
 542 static int set_altsetting(struct usbtest_dev *dev, int alternate)
 543 {
 544         struct usb_interface            *iface = dev->intf;
 545         struct usb_device               *udev;
 546
 547         if (alternate < 0 || alternate >= 256)
 548                 return -EINVAL;
 549
 550         udev = interface_to_usbdev(iface);
 551         return usb_set_interface(udev,
 552                         iface->altsetting[0].desc.bInterfaceNumber,
 553                         alternate);
 554 }
 555
 556 static int is_good_config(struct usbtest_dev *tdev, int len)
 557 {
 558         struct usb_config_descriptor    *config;
 559
 560         if (len < sizeof *config)
 561                 return 0;
 562         config = (struct usb_config_descriptor *) tdev->buf;
 563
 564         switch (config->bDescriptorType) {
 565         case USB_DT_CONFIG:
 566         case USB_DT_OTHER_SPEED_CONFIG:
 567                 if (config->bLength != 9) {
 568                         ERROR(tdev, "bogus config descriptor length\n");
 569                         return 0;
 570                 }
 571                 /* this bit 'must be 1' but often isn't */
 572                 if (!realworld && !(config->bmAttributes & 0x80)) {
 573                         ERROR(tdev, "high bit of config attributes not set\n");
 574                         return 0;
 575                 }
 576                 if (config->bmAttributes & 0x1f) {      /* reserved == 0 */
 577                         ERROR(tdev, "reserved config bits set\n");
 578                         return 0;
 579                 }
 580                 break;
 581         default:
 582                 return 0;
 583         }
 584
 585         if (le16_to_cpu(config->wTotalLength) == len)   /* read it all */
 586                 return 1;
 587         if (le16_to_cpu(config->wTotalLength) >= TBUF_SIZE)     /* max partial read */
 588                 return 1;
 589         ERROR(tdev, "bogus config descriptor read size\n");
 590         return 0;
 591 }
 592
 593 /* sanity test for standard requests working with usb_control_mesg() and some
 594  * of the utility functions which use it.
 595  *
 596  * this doesn't test how endpoint halts behave or data toggles get set, since
 597  * we won't do I/O to bulk/interrupt endpoints here (which is how to change
 598  * halt or toggle).  toggle testing is impractical without support from hcds.
 599  *
 600  * this avoids failing devices linux would normally work with, by not testing
 601  * config/altsetting operations for devices that only support their defaults.
 602  * such devices rarely support those needless operations.
 603  *
 604  * NOTE that since this is a sanity test, it's not examining boundary cases
 605  * to see if usbcore, hcd, and device all behave right.  such testing would
 606  * involve varied read sizes and other operation sequences.
 607  */
 608 static int ch9_postconfig(struct usbtest_dev *dev)
 609 {
 610         struct usb_interface    *iface = dev->intf;
 611         struct usb_device       *udev = interface_to_usbdev(iface);
 612         int                     i, alt, retval;
 613
 614         /* [9.2.3] if there's more than one altsetting, we need to be able to
 615          * set and get each one.  mostly trusts the descriptors from usbcore.
 616          */
 617         for (i = 0; i < iface->num_altsetting; i++) {
 618
 619                 /* 9.2.3 constrains the range here */
 620                 alt = iface->altsetting[i].desc.bAlternateSetting;
 621                 if (alt < 0 || alt >= iface->num_altsetting) {
 622                         dev_err(&iface->dev,
 623                                         "invalid alt [%d].bAltSetting = %d\n",
 624                                         i, alt);
 625                 }
 626
 627                 /* [real world] get/set unimplemented if there's only one */
 628                 if (realworld && iface->num_altsetting == 1)
 629                         continue;
 630
 631                 /* [9.4.10] set_interface */
 632                 retval = set_altsetting(dev, alt);
 633                 if (retval) {
 634                         dev_err(&iface->dev, "can't set_interface = %d, %d\n",
 635                                         alt, retval);
 636                         return retval;
 637                 }
 638
 639                 /* [9.4.4] get_interface always works */
 640                 retval = get_altsetting(dev);
 641                 if (retval != alt) {
 642                         dev_err(&iface->dev, "get alt should be %d, was %d\n",
 643                                         alt, retval);
 644                         return (retval < 0) ? retval : -EDOM;
 645                 }
 646
 647         }
 648
 649         /* [real world] get_config unimplemented if there's only one */
 650         if (!realworld || udev->descriptor.bNumConfigurations != 1) {
 651                 int     expected = udev->actconfig->desc.bConfigurationValue;
 652
 653                 /* [9.4.2] get_configuration always works
 654                  * ... although some cheap devices (like one TI Hub I've got)
 655                  * won't return config descriptors except before set_config.
 656                  */
 657                 retval = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
 658                                 USB_REQ_GET_CONFIGURATION,
 659                                 USB_DIR_IN | USB_RECIP_DEVICE,
 660                                 0, 0, dev->buf, 1, USB_CTRL_GET_TIMEOUT);
 661                 if (retval != 1 || dev->buf[0] != expected) {
 662                         dev_err(&iface->dev, "get config --> %d %d (1 %d)\n",
 663                                 retval, dev->buf[0], expected);
 664                         return (retval < 0) ? retval : -EDOM;
 665                 }
 666         }
 667
 668         /* there's always [9.4.3] a device descriptor [9.6.1] */
 669         retval = usb_get_descriptor(udev, USB_DT_DEVICE, 0,
 670                         dev->buf, sizeof udev->descriptor);
 671         if (retval != sizeof udev->descriptor) {
 672                 dev_err(&iface->dev, "dev descriptor --> %d\n", retval);
 673                 return (retval < 0) ? retval : -EDOM;
 674         }
 675
 676         /* there's always [9.4.3] at least one config descriptor [9.6.3] */
 677         for (i = 0; i < udev->descriptor.bNumConfigurations; i++) {
 678                 retval = usb_get_descriptor(udev, USB_DT_CONFIG, i,
 679                                 dev->buf, TBUF_SIZE);
 680                 if (!is_good_config(dev, retval)) {
 681                         dev_err(&iface->dev,
 682                                         "config [%d] descriptor --> %d\n",
 683                                         i, retval);
 684                         return (retval < 0) ? retval : -EDOM;
 685                 }
 686
 687                 /* FIXME cross-checking udev->config[i] to make sure usbcore
 688                  * parsed it right (etc) would be good testing paranoia
 689                  */
 690         }
 691
 692         /* and sometimes [9.2.6.6] speed dependent descriptors */
 693         if (le16_to_cpu(udev->descriptor.bcdUSB) == 0x0200) {
 694                 struct usb_qualifier_descriptor *d = NULL;
 695
 696                 /* device qualifier [9.6.2] */
 697                 retval = usb_get_descriptor(udev,
 698                                 USB_DT_DEVICE_QUALIFIER, 0, dev->buf,
 699                                 sizeof(struct usb_qualifier_descriptor));
 700                 if (retval == -EPIPE) {
 701                         if (udev->speed == USB_SPEED_HIGH) {
 702                                 dev_err(&iface->dev,
 703                                                 "hs dev qualifier --> %d\n",
 704                                                 retval);
 705                                 return (retval < 0) ? retval : -EDOM;
 706                         }
 707                         /* usb2.0 but not high-speed capable; fine */
 708                 } else if (retval != sizeof(struct usb_qualifier_descriptor)) {
 709                         dev_err(&iface->dev, "dev qualifier --> %d\n", retval);
 710                         return (retval < 0) ? retval : -EDOM;
 711                 } else
 712                         d = (struct usb_qualifier_descriptor *) dev->buf;
 713
 714                 /* might not have [9.6.2] any other-speed configs [9.6.4] */
 715                 if (d) {
 716                         unsigned max = d->bNumConfigurations;
 717                         for (i = 0; i < max; i++) {
 718                                 retval = usb_get_descriptor(udev,
 719                                         USB_DT_OTHER_SPEED_CONFIG, i,
 720                                         dev->buf, TBUF_SIZE);
 721                                 if (!is_good_config(dev, retval)) {
 722                                         dev_err(&iface->dev,
 723                                                 "other speed config --> %d\n",
 724                                                 retval);
 725                                         return (retval < 0) ? retval : -EDOM;
 726                                 }
 727                         }
 728                 }
 729         }
 730         /* FIXME fetch strings from at least the device descriptor */
 731
 732         /* [9.4.5] get_status always works */
 733         retval = usb_get_status(udev, USB_RECIP_DEVICE, 0, dev->buf);
 734         if (retval != 2) {
 735                 dev_err(&iface->dev, "get dev status --> %d\n", retval);
 736                 return (retval < 0) ? retval : -EDOM;
 737         }
 738
 739         /* FIXME configuration.bmAttributes says if we could try to set/clear
 740          * the device's remote wakeup feature ... if we can, test that here
 741          */
 742
 743         retval = usb_get_status(udev, USB_RECIP_INTERFACE,
 744                         iface->altsetting[0].desc.bInterfaceNumber, dev->buf);
 745         if (retval != 2) {
 746                 dev_err(&iface->dev, "get interface status --> %d\n", retval);
 747                 return (retval < 0) ? retval : -EDOM;
 748         }
 749         /* FIXME get status for each endpoint in the interface */
 750
 751         return 0;
 752 }
 753
 754 /*-------------------------------------------------------------------------*/
 755
 756 /* use ch9 requests to test whether:
 757  *   (a) queues work for control, keeping N subtests queued and
 758  *       active (auto-resubmit) for M loops through the queue.
 759  *   (b) protocol stalls (control-only) will autorecover.
 760  *       it's not like bulk/intr; no halt clearing.
 761  *   (c) short control reads are reported and handled.
 762  *   (d) queues are always processed in-order
 763  */
 764
 765 struct ctrl_ctx {
 766         spinlock_t              lock;
 767         struct usbtest_dev      *dev;
 768         struct completion       complete;
 769         unsigned                count;
 770         unsigned                pending;
 771         int                     status;
 772         struct urb              **urb;
 773         struct usbtest_param    *param;
 774         int                     last;
 775 };
 776
 777 #define NUM_SUBCASES    15              /* how many test subcases here? */
 778
 779 struct subcase {
 780         struct usb_ctrlrequest  setup;
 781         int                     number;
 782         int                     expected;
 783 };
 784
 785 static void ctrl_complete(struct urb *urb)
 786 {
 787         struct ctrl_ctx         *ctx = urb->context;
 788         struct usb_ctrlrequest  *reqp;
 789         struct subcase          *subcase;
 790         int                     status = urb->status;
 791
 792         reqp = (struct usb_ctrlrequest *)urb->setup_packet;
 793         subcase = container_of(reqp, struct subcase, setup);
 794
 795         spin_lock(&ctx->lock);
 796         ctx->count--;
 797         ctx->pending--;
 798
 799         /* queue must transfer and complete in fifo order, unless
 800          * usb_unlink_urb() is used to unlink something not at the
 801          * physical queue head (not tested).
 802          */
 803         if (subcase->number > 0) {
 804                 if ((subcase->number - ctx->last) != 1) {
 805                         ERROR(ctx->dev,
 806                                 "subcase %d completed out of order, last %d\n",
 807                                 subcase->number, ctx->last);
 808                         status = -EDOM;
 809                         ctx->last = subcase->number;
 810                         goto error;
 811                 }
 812         }
 813         ctx->last = subcase->number;
 814
 815         /* succeed or fault in only one way? */
 816         if (status == subcase->expected)
 817                 status = 0;
 818
 819         /* async unlink for cleanup? */
 820         else if (status != -ECONNRESET) {
 821
 822                 /* some faults are allowed, not required */
 823                 if (subcase->expected > 0 && (
 824                           ((status == -subcase->expected        /* happened */
 825                            || status == 0))))                   /* didn't */
 826                         status = 0;
 827                 /* sometimes more than one fault is allowed */
 828                 else if (subcase->number == 12 && status == -EPIPE)
 829                         status = 0;
 830                 else
 831                         ERROR(ctx->dev, "subtest %d error, status %d\n",
 832                                         subcase->number, status);
 833         }
 834
 835         /* unexpected status codes mean errors; ideally, in hardware */
 836         if (status) {
 837 error:
 838                 if (ctx->status == 0) {
 839                         int             i;
 840
 841                         ctx->status = status;
 842                         ERROR(ctx->dev, "control queue %02x.%02x, err %d, "
 843                                         "%d left, subcase %d, len %d/%d\n",
 844                                         reqp->bRequestType, reqp->bRequest,
 845                                         status, ctx->count, subcase->number,
 846                                         urb->actual_length,
 847                                         urb->transfer_buffer_length);
 848
 849                         /* FIXME this "unlink everything" exit route should
 850                          * be a separate test case.
 851                          */
 852
 853                         /* unlink whatever's still pending */
 854                         for (i = 1; i < ctx->param->sglen; i++) {
 855                                 struct urb *u = ctx->urb[
 856                                                         (i + subcase->number)
 857                                                         % ctx->param->sglen];
 858
 859                                 if (u == urb || !u->dev)
 860                                         continue;
 861                                 spin_unlock(&ctx->lock);
 862                                 status = usb_unlink_urb(u);
 863                                 spin_lock(&ctx->lock);
 864                                 switch (status) {
 865                                 case -EINPROGRESS:
 866                                 case -EBUSY:
 867                                 case -EIDRM:
 868                                         continue;
 869                                 default:
 870                                         ERROR(ctx->dev, "urb unlink --> %d\n",
 871                                                         status);
 872                                 }
 873                         }
 874                         status = ctx->status;
 875                 }
 876         }
 877
 878         /* resubmit if we need to, else mark this as done */
 879         if ((status == 0) && (ctx->pending < ctx->count)) {
 880                 status = usb_submit_urb(urb, GFP_ATOMIC);
 881                 if (status != 0) {
 882                         ERROR(ctx->dev,
 883                                 "can't resubmit ctrl %02x.%02x, err %d\n",
 884                                 reqp->bRequestType, reqp->bRequest, status);
 885                         urb->dev = NULL;
 886                 } else
 887                         ctx->pending++;
 888         } else
 889                 urb->dev = NULL;
 890
 891         /* signal completion when nothing's queued */
 892         if (ctx->pending == 0)
 893                 complete(&ctx->complete);
 894         spin_unlock(&ctx->lock);
 895 }
 896
 897 static int
 898 test_ctrl_queue(struct usbtest_dev *dev, struct usbtest_param *param)
 899 {
 900         struct usb_device       *udev = testdev_to_usbdev(dev);
 901         struct urb              **urb;
 902         struct ctrl_ctx         context;
 903         int                     i;
 904
 905         spin_lock_init(&context.lock);
 906         context.dev = dev;
 907         init_completion(&context.complete);
 908         context.count = param->sglen * param->iterations;
 909         context.pending = 0;
 910         context.status = -ENOMEM;
 911         context.param = param;
 912         context.last = -1;
 913
 914         /* allocate and init the urbs we'll queue.
 915          * as with bulk/intr sglists, sglen is the queue depth; it also
 916          * controls which subtests run (more tests than sglen) or rerun.
 917          */
 918         urb = kcalloc(param->sglen, sizeof(struct urb *), GFP_KERNEL);
 919         if (!urb)
 920                 return -ENOMEM;
 921         for (i = 0; i < param->sglen; i++) {
 922                 int                     pipe = usb_rcvctrlpipe(udev, 0);
 923                 unsigned                len;
 924                 struct urb              *u;
 925                 struct usb_ctrlrequest  req;
 926                 struct subcase          *reqp;
 927
 928                 /* sign of this variable means:
 929                  *  -: tested code must return this (negative) error code
 930                  *  +: tested code may return this (negative too) error code
 931                  */
 932                 int                     expected = 0;
 933
 934                 /* requests here are mostly expected to succeed on any
 935                  * device, but some are chosen to trigger protocol stalls
 936                  * or short reads.
 937                  */
 938                 memset(&req, 0, sizeof req);
 939                 req.bRequest = USB_REQ_GET_DESCRIPTOR;
 940                 req.bRequestType = USB_DIR_IN|USB_RECIP_DEVICE;
 941
 942                 switch (i % NUM_SUBCASES) {
 943                 case 0:         /* get device descriptor */
 944                         req.wValue = cpu_to_le16(USB_DT_DEVICE << 8);
 945                         len = sizeof(struct usb_device_descriptor);
 946                         break;
 947                 case 1:         /* get first config descriptor (only) */
 948                         req.wValue = cpu_to_le16((USB_DT_CONFIG << 8) | 0);
 949                         len = sizeof(struct usb_config_descriptor);
 950                         break;
 951                 case 2:         /* get altsetting (OFTEN STALLS) */
 952                         req.bRequest = USB_REQ_GET_INTERFACE;
 953                         req.bRequestType = USB_DIR_IN|USB_RECIP_INTERFACE;
 954                         /* index = 0 means first interface */
 955                         len = 1;
 956                         expected = EPIPE;
 957                         break;
 958                 case 3:         /* get interface status */
 959                         req.bRequest = USB_REQ_GET_STATUS;
 960                         req.bRequestType = USB_DIR_IN|USB_RECIP_INTERFACE;
 961                         /* interface 0 */
 962                         len = 2;
 963                         break;
 964                 case 4:         /* get device status */
 965                         req.bRequest = USB_REQ_GET_STATUS;
 966                         req.bRequestType = USB_DIR_IN|USB_RECIP_DEVICE;
 967                         len = 2;
 968                         break;
 969                 case 5:         /* get device qualifier (MAY STALL) */
 970                         req.wValue = cpu_to_le16 (USB_DT_DEVICE_QUALIFIER << 8);
 971                         len = sizeof(struct usb_qualifier_descriptor);
 972                         if (udev->speed != USB_SPEED_HIGH)
 973                                 expected = EPIPE;
 974                         break;
 975                 case 6:         /* get first config descriptor, plus interface */
 976                         req.wValue = cpu_to_le16((USB_DT_CONFIG << 8) | 0);
 977                         len = sizeof(struct usb_config_descriptor);
 978                         len += sizeof(struct usb_interface_descriptor);
 979                         break;
 980                 case 7:         /* get interface descriptor (ALWAYS STALLS) */
 981                         req.wValue = cpu_to_le16 (USB_DT_INTERFACE << 8);
 982                         /* interface == 0 */
 983                         len = sizeof(struct usb_interface_descriptor);
 984                         expected = -EPIPE;
 985                         break;
 986                 /* NOTE: two consecutive stalls in the queue here.
 987                  *  that tests fault recovery a bit more aggressively. */
 988                 case 8:         /* clear endpoint halt (MAY STALL) */
 989                         req.bRequest = USB_REQ_CLEAR_FEATURE;
 990                         req.bRequestType = USB_RECIP_ENDPOINT;
 991                         /* wValue 0 == ep halt */
 992                         /* wIndex 0 == ep0 (shouldn't halt!) */
 993                         len = 0;
 994                         pipe = usb_sndctrlpipe(udev, 0);
 995                         expected = EPIPE;
 996                         break;
 997                 case 9:         /* get endpoint status */
 998                         req.bRequest = USB_REQ_GET_STATUS;
 999                         req.bRequestType = USB_DIR_IN|USB_RECIP_ENDPOINT;
1000                         /* endpoint 0 */
1001                         len = 2;
1002                         break;
1003                 case 10:        /* trigger short read (EREMOTEIO) */
1004                         req.wValue = cpu_to_le16((USB_DT_CONFIG << 8) | 0);
1005                         len = 1024;
1006                         expected = -EREMOTEIO;
1007                         break;
1008                 /* NOTE: two consecutive _different_ faults in the queue. */
1009                 case 11:        /* get endpoint descriptor (ALWAYS STALLS) */
1010                         req.wValue = cpu_to_le16(USB_DT_ENDPOINT << 8);
1011                         /* endpoint == 0 */
1012                         len = sizeof(struct usb_interface_descriptor);
1013                         expected = EPIPE;
1014                         break;
1015                 /* NOTE: sometimes even a third fault in the queue! */
1016                 case 12:        /* get string 0 descriptor (MAY STALL) */
1017                         req.wValue = cpu_to_le16(USB_DT_STRING << 8);
1018                         /* string == 0, for language IDs */
1019                         len = sizeof(struct usb_interface_descriptor);
1020                         /* may succeed when > 4 languages */
1021                         expected = EREMOTEIO;   /* or EPIPE, if no strings */
1022                         break;
1023                 case 13:        /* short read, resembling case 10 */
1024                         req.wValue = cpu_to_le16((USB_DT_CONFIG << 8) | 0);
1025                         /* last data packet "should" be DATA1, not DATA0 */
1026                         len = 1024 - udev->descriptor.bMaxPacketSize0;
1027                         expected = -EREMOTEIO;
1028                         break;
1029                 case 14:        /* short read; try to fill the last packet */
1030                         req.wValue = cpu_to_le16((USB_DT_DEVICE << 8) | 0);
1031                         /* device descriptor size == 18 bytes */
1032                         len = udev->descriptor.bMaxPacketSize0;
1033                         if (udev->speed == USB_SPEED_SUPER)
1034                                 len = 512;
1035                         switch (len) {
1036                         case 8:
1037                                 len = 24;
1038                                 break;
1039                         case 16:
1040                                 len = 32;
1041                                 break;
1042                         }
1043                         expected = -EREMOTEIO;
1044                         break;
1045                 default:
1046                         ERROR(dev, "bogus number of ctrl queue testcases!\n");
1047                         context.status = -EINVAL;
1048                         goto cleanup;
1049                 }
1050                 req.wLength = cpu_to_le16(len);
1051                 urb[i] = u = simple_alloc_urb(udev, pipe, len);
1052                 if (!u)
1053                         goto cleanup;
1054
1055                 reqp = kmalloc(sizeof *reqp, GFP_KERNEL);
1056                 if (!reqp)
1057                         goto cleanup;
1058                 reqp->setup = req;
1059                 reqp->number = i % NUM_SUBCASES;
1060                 reqp->expected = expected;
1061                 u->setup_packet = (char *) &reqp->setup;
1062
1063                 u->context = &context;
1064                 u->complete = ctrl_complete;
1065         }
1066
1067         /* queue the urbs */
1068         context.urb = urb;
1069         spin_lock_irq(&context.lock);
1070         for (i = 0; i < param->sglen; i++) {
1071                 context.status = usb_submit_urb(urb[i], GFP_ATOMIC);
1072                 if (context.status != 0) {
1073                         ERROR(dev, "can't submit urb[%d], status %d\n",
1074                                         i, context.status);
1075                         context.count = context.pending;
1076                         break;
1077                 }
1078                 context.pending++;
1079         }
1080         spin_unlock_irq(&context.lock);
1081
1082         /* FIXME  set timer and time out; provide a disconnect hook */
1083
1084         /* wait for the last one to complete */
1085         if (context.pending > 0)
1086                 wait_for_completion(&context.complete);
1087
1088 cleanup:
1089         for (i = 0; i < param->sglen; i++) {
1090                 if (!urb[i])
1091                         continue;
1092                 urb[i]->dev = udev;
1093                 kfree(urb[i]->setup_packet);
1094                 simple_free_urb(urb[i]);
1095         }
1096         kfree(urb);
1097         return context.status;
1098 }
1099 #undef NUM_SUBCASES
1100
1101
1102 /*-------------------------------------------------------------------------*/
1103
1104 static void unlink1_callback(struct urb *urb)
1105 {
1106         int     status = urb->status;
1107
1108         /* we "know" -EPIPE (stall) never happens */
1109         if (!status)
1110                 status = usb_submit_urb(urb, GFP_ATOMIC);
1111         if (status) {
1112                 urb->status = status;
1113                 complete(urb->context);
1114         }
1115 }
1116
1117 static int unlink1(struct usbtest_dev *dev, int pipe, int size, int async)
1118 {
1119         struct urb              *urb;
1120         struct completion       completion;
1121         int                     retval = 0;
1122
1123         init_completion(&completion);
1124         urb = simple_alloc_urb(testdev_to_usbdev(dev), pipe, size);
1125         if (!urb)
1126                 return -ENOMEM;
1127         urb->context = &completion;
1128         urb->complete = unlink1_callback;
1129
1130         /* keep the endpoint busy.  there are lots of hc/hcd-internal
1131          * states, and testing should get to all of them over time.
1132          *
1133          * FIXME want additional tests for when endpoint is STALLing
1134          * due to errors, or is just NAKing requests.
1135          */
1136         retval = usb_submit_urb(urb, GFP_KERNEL);
1137         if (retval != 0) {
1138                 dev_err(&dev->intf->dev, "submit fail %d\n", retval);
1139                 return retval;
1140         }
1141
1142         /* unlinking that should always work.  variable delay tests more
1143          * hcd states and code paths, even with little other system load.
1144          */
1145         msleep(jiffies % (2 * INTERRUPT_RATE));
1146         if (async) {
1147                 while (!completion_done(&completion)) {
1148                         retval = usb_unlink_urb(urb);
1149
1150                         switch (retval) {
1151                         case -EBUSY:
1152                         case -EIDRM:
1153                                 /* we can't unlink urbs while they're completing
1154                                  * or if they've completed, and we haven't
1155                                  * resubmitted. "normal" drivers would prevent
1156                                  * resubmission, but since we're testing unlink
1157                                  * paths, we can't.
1158                                  */
1159                                 ERROR(dev, "unlink retry\n");
1160                                 continue;
1161                         case 0:
1162                         case -EINPROGRESS:
1163                                 break;
1164
1165                         default:
1166                                 dev_err(&dev->intf->dev,
1167                                         "unlink fail %d\n", retval);
1168                                 return retval;
1169                         }
1170
1171                         break;
1172                 }
1173         } else
1174                 usb_kill_urb(urb);
1175
1176         wait_for_completion(&completion);
1177         retval = urb->status;
1178         simple_free_urb(urb);
1179
1180         if (async)
1181                 return (retval == -ECONNRESET) ? 0 : retval - 1000;
1182         else
1183                 return (retval == -ENOENT || retval == -EPERM) ?
1184                                 0 : retval - 2000;
1185 }
1186
1187 static int unlink_simple(struct usbtest_dev *dev, int pipe, int len)
1188 {
1189         int                     retval = 0;
1190
1191         /* test sync and async paths */
1192         retval = unlink1(dev, pipe, len, 1);
1193         if (!retval)
1194                 retval = unlink1(dev, pipe, len, 0);
1195         return retval;
1196 }
1197
1198 /*-------------------------------------------------------------------------*/
1199
1200 struct queued_ctx {
1201         struct completion       complete;
1202         atomic_t                pending;
1203         unsigned                num;
1204         int                     status;
1205         struct urb              **urbs;
1206 };
1207
1208 static void unlink_queued_callback(struct urb *urb)
1209 {
1210         int                     status = urb->status;
1211         struct queued_ctx       *ctx = urb->context;
1212
1213         if (ctx->status)
1214                 goto done;
1215         if (urb == ctx->urbs[ctx->num - 4] || urb == ctx->urbs[ctx->num - 2]) {
1216                 if (status == -ECONNRESET)
1217                         goto done;
1218                 /* What error should we report if the URB completed normally? */
1219         }
1220         if (status != 0)
1221                 ctx->status = status;
1222
1223  done:
1224         if (atomic_dec_and_test(&ctx->pending))
1225                 complete(&ctx->complete);
1226 }
1227
1228 static int unlink_queued(struct usbtest_dev *dev, int pipe, unsigned num,
1229                 unsigned size)
1230 {
1231         struct queued_ctx       ctx;
1232         struct usb_device       *udev = testdev_to_usbdev(dev);
1233         void                    *buf;
1234         dma_addr_t              buf_dma;
1235         int                     i;
1236         int                     retval = -ENOMEM;
1237
1238         init_completion(&ctx.complete);
1239         atomic_set(&ctx.pending, 1);    /* One more than the actual value */
1240         ctx.num = num;
1241         ctx.status = 0;
1242
1243         buf = usb_alloc_coherent(udev, size, GFP_KERNEL, &buf_dma);
1244         if (!buf)
1245                 return retval;
1246         memset(buf, 0, size);
1247
1248         /* Allocate and init the urbs we'll queue */
1249         ctx.urbs = kcalloc(num, sizeof(struct urb *), GFP_KERNEL);
1250         if (!ctx.urbs)
1251                 goto free_buf;
1252         for (i = 0; i < num; i++) {
1253                 ctx.urbs[i] = usb_alloc_urb(0, GFP_KERNEL);
1254                 if (!ctx.urbs[i])
1255                         goto free_urbs;
1256                 usb_fill_bulk_urb(ctx.urbs[i], udev, pipe, buf, size,
1257                                 unlink_queued_callback, &ctx);
1258                 ctx.urbs[i]->transfer_dma = buf_dma;
1259                 ctx.urbs[i]->transfer_flags = URB_NO_TRANSFER_DMA_MAP;
1260         }
1261
1262         /* Submit all the URBs and then unlink URBs num - 4 and num - 2. */
1263         for (i = 0; i < num; i++) {
1264                 atomic_inc(&ctx.pending);
1265                 retval = usb_submit_urb(ctx.urbs[i], GFP_KERNEL);
1266                 if (retval != 0) {
1267                         dev_err(&dev->intf->dev, "submit urbs[%d] fail %d\n",
1268                                         i, retval);
1269                         atomic_dec(&ctx.pending);
1270                         ctx.status = retval;
1271                         break;
1272                 }
1273         }
1274         if (i == num) {
1275                 usb_unlink_urb(ctx.urbs[num - 4]);
1276                 usb_unlink_urb(ctx.urbs[num - 2]);
1277         } else {
1278                 while (--i >= 0)
1279                         usb_unlink_urb(ctx.urbs[i]);
1280         }
1281
1282         if (atomic_dec_and_test(&ctx.pending))          /* The extra count */
1283                 complete(&ctx.complete);
1284         wait_for_completion(&ctx.complete);
1285         retval = ctx.status;
1286
1287  free_urbs:
1288         for (i = 0; i < num; i++)
1289                 usb_free_urb(ctx.urbs[i]);
1290         kfree(ctx.urbs);
1291  free_buf:
1292         usb_free_coherent(udev, size, buf, buf_dma);
1293         return retval;
1294 }
1295
1296 /*-------------------------------------------------------------------------*/
1297
1298 static int verify_not_halted(struct usbtest_dev *tdev, int ep, struct urb *urb)
1299 {
1300         int     retval;
1301         u16     status;
1302
1303         /* shouldn't look or act halted */
1304         retval = usb_get_status(urb->dev, USB_RECIP_ENDPOINT, ep, &status);
1305         if (retval < 0) {
1306                 ERROR(tdev, "ep %02x couldn't get no-halt status, %d\n",
1307                                 ep, retval);
1308                 return retval;
1309         }
1310         if (status != 0) {
1311                 ERROR(tdev, "ep %02x bogus status: %04x != 0\n", ep, status);
1312                 return -EINVAL;
1313         }
1314         retval = simple_io(tdev, urb, 1, 0, 0, __func__);
1315         if (retval != 0)
1316                 return -EINVAL;
1317         return 0;
1318 }
1319
1320 static int verify_halted(struct usbtest_dev *tdev, int ep, struct urb *urb)
1321 {
1322         int     retval;
1323         u16     status;
1324
1325         /* should look and act halted */
1326         retval = usb_get_status(urb->dev, USB_RECIP_ENDPOINT, ep, &status);
1327         if (retval < 0) {
1328                 ERROR(tdev, "ep %02x couldn't get halt status, %d\n",
1329                                 ep, retval);
1330                 return retval;
1331         }
1332         le16_to_cpus(&status);
1333         if (status != 1) {
1334                 ERROR(tdev, "ep %02x bogus status: %04x != 1\n", ep, status);
1335                 return -EINVAL;
1336         }
1337         retval = simple_io(tdev, urb, 1, 0, -EPIPE, __func__);
1338         if (retval != -EPIPE)
1339                 return -EINVAL;
1340         retval = simple_io(tdev, urb, 1, 0, -EPIPE, "verify_still_halted");
1341         if (retval != -EPIPE)
1342                 return -EINVAL;
1343         return 0;
1344 }
1345
1346 static int test_halt(struct usbtest_dev *tdev, int ep, struct urb *urb)
1347 {
1348         int     retval;
1349
1350         /* shouldn't look or act halted now */
1351         retval = verify_not_halted(tdev, ep, urb);
1352         if (retval < 0)
1353                 return retval;
1354
1355         /* set halt (protocol test only), verify it worked */
1356         retval = usb_control_msg(urb->dev, usb_sndctrlpipe(urb->dev, 0),
1357                         USB_REQ_SET_FEATURE, USB_RECIP_ENDPOINT,
1358                         USB_ENDPOINT_HALT, ep,
1359                         NULL, 0, USB_CTRL_SET_TIMEOUT);
1360         if (retval < 0) {
1361                 ERROR(tdev, "ep %02x couldn't set halt, %d\n", ep, retval);
1362                 return retval;
1363         }
1364         retval = verify_halted(tdev, ep, urb);
1365         if (retval < 0)
1366                 return retval;
1367
1368         /* clear halt (tests API + protocol), verify it worked */
1369         retval = usb_clear_halt(urb->dev, urb->pipe);
1370         if (retval < 0) {
1371                 ERROR(tdev, "ep %02x couldn't clear halt, %d\n", ep, retval);
1372                 return retval;
1373         }
1374         retval = verify_not_halted(tdev, ep, urb);
1375         if (retval < 0)
1376                 return retval;
1377
1378         /* NOTE:  could also verify SET_INTERFACE clear halts ... */
1379
1380         return 0;
1381 }
1382
1383 static int halt_simple(struct usbtest_dev *dev)
1384 {
1385         int             ep;
1386         int             retval = 0;
1387         struct urb      *urb;
1388
1389         urb = simple_alloc_urb(testdev_to_usbdev(dev), 0, 512);
1390         if (urb == NULL)
1391                 return -ENOMEM;
1392
1393         if (dev->in_pipe) {
1394                 ep = usb_pipeendpoint(dev->in_pipe) | USB_DIR_IN;
1395                 urb->pipe = dev->in_pipe;
1396                 retval = test_halt(dev, ep, urb);
1397                 if (retval < 0)
1398                         goto done;
1399         }
1400
1401         if (dev->out_pipe) {
1402                 ep = usb_pipeendpoint(dev->out_pipe);
1403                 urb->pipe = dev->out_pipe;
1404                 retval = test_halt(dev, ep, urb);
1405         }
1406 done:
1407         simple_free_urb(urb);
1408         return retval;
1409 }
1410
1411 /*-------------------------------------------------------------------------*/
1412
1413 /* Control OUT tests use the vendor control requests from Intel's
1414  * USB 2.0 compliance test device:  write a buffer, read it back.
1415  *
1416  * Intel's spec only _requires_ that it work for one packet, which
1417  * is pretty weak.   Some HCDs place limits here; most devices will
1418  * need to be able to handle more than one OUT data packet.  We'll
1419  * try whatever we're told to try.
1420  */
1421 static int ctrl_out(struct usbtest_dev *dev,
1422                 unsigned count, unsigned length, unsigned vary, unsigned offset)
1423 {
1424         unsigned                i, j, len;
1425         int                     retval;
1426         u8                      *buf;
1427         char                    *what = "?";
1428         struct usb_device       *udev;
1429
1430         if (length < 1 || length > 0xffff || vary >= length)
1431                 return -EINVAL;
1432
1433         buf = kmalloc(length + offset, GFP_KERNEL);
1434         if (!buf)
1435                 return -ENOMEM;
1436
1437         buf += offset;
1438         udev = testdev_to_usbdev(dev);
1439         len = length;
1440         retval = 0;
1441
1442         /* NOTE:  hardware might well act differently if we pushed it
1443          * with lots back-to-back queued requests.
1444          */
1445         for (i = 0; i < count; i++) {
1446                 /* write patterned data */
1447                 for (j = 0; j < len; j++)
1448                         buf[j] = i + j;
1449                 retval = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
1450                                 0x5b, USB_DIR_OUT|USB_TYPE_VENDOR,
1451                                 0, 0, buf, len, USB_CTRL_SET_TIMEOUT);
1452                 if (retval != len) {
1453                         what = "write";
1454                         if (retval >= 0) {
1455                                 ERROR(dev, "ctrl_out, wlen %d (expected %d)\n",
1456                                                 retval, len);
1457                                 retval = -EBADMSG;
1458                         }
1459                         break;
1460                 }
1461
1462                 /* read it back -- assuming nothing intervened!!  */
1463                 retval = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
1464                                 0x5c, USB_DIR_IN|USB_TYPE_VENDOR,
1465                                 0, 0, buf, len, USB_CTRL_GET_TIMEOUT);
1466                 if (retval != len) {
1467                         what = "read";
1468                         if (retval >= 0) {
1469                                 ERROR(dev, "ctrl_out, rlen %d (expected %d)\n",
1470                                                 retval, len);
1471                                 retval = -EBADMSG;
1472                         }
1473                         break;
1474                 }
1475
1476                 /* fail if we can't verify */
1477                 for (j = 0; j < len; j++) {
1478                         if (buf[j] != (u8) (i + j)) {
1479                                 ERROR(dev, "ctrl_out, byte %d is %d not %d\n",
1480                                         j, buf[j], (u8) i + j);
1481                                 retval = -EBADMSG;
1482                                 break;
1483                         }
1484                 }
1485                 if (retval < 0) {
1486                         what = "verify";
1487                         break;
1488                 }
1489
1490                 len += vary;
1491
1492                 /* [real world] the "zero bytes IN" case isn't really used.
1493                  * hardware can easily trip up in this weird case, since its
1494                  * status stage is IN, not OUT like other ep0in transfers.
1495                  */
1496                 if (len > length)
1497                         len = realworld ? 1 : 0;
1498         }
1499
1500         if (retval < 0)
1501                 ERROR(dev, "ctrl_out %s failed, code %d, count %d\n",
1502                         what, retval, i);
1503
1504         kfree(buf - offset);
1505         return retval;
1506 }
1507
1508 /*-------------------------------------------------------------------------*/
1509
1510 /* ISO tests ... mimics common usage
1511  *  - buffer length is split into N packets (mostly maxpacket sized)
1512  *  - multi-buffers according to sglen
1513  */
1514
1515 struct iso_context {
1516         unsigned                count;
1517         unsigned                pending;
1518         spinlock_t              lock;
1519         struct completion       done;
1520         int                     submit_error;
1521         unsigned long           errors;
1522         unsigned long           packet_count;
1523         struct usbtest_dev      *dev;
1524 };
1525
1526 static void iso_callback(struct urb *urb)
1527 {
1528         struct iso_context      *ctx = urb->context;
1529
1530         spin_lock(&ctx->lock);
1531         ctx->count--;
1532
1533         ctx->packet_count += urb->number_of_packets;
1534         if (urb->error_count > 0)
1535                 ctx->errors += urb->error_count;
1536         else if (urb->status != 0)
1537                 ctx->errors += urb->number_of_packets;
1538         else if (urb->actual_length != urb->transfer_buffer_length)
1539                 ctx->errors++;
1540         else if (check_guard_bytes(ctx->dev, urb) != 0)
1541                 ctx->errors++;
1542
1543         if (urb->status == 0 && ctx->count > (ctx->pending - 1)
1544                         && !ctx->submit_error) {
1545                 int status = usb_submit_urb(urb, GFP_ATOMIC);
1546                 switch (status) {
1547                 case 0:
1548                         goto done;
1549                 default:
1550                         dev_err(&ctx->dev->intf->dev,
1551                                         "iso resubmit err %d\n",
1552                                         status);
1553                         /* FALLTHROUGH */
1554                 case -ENODEV:                   /* disconnected */
1555                 case -ESHUTDOWN:                /* endpoint disabled */
1556                         ctx->submit_error = 1;
1557                         break;
1558                 }
1559         }
1560
1561         ctx->pending--;
1562         if (ctx->pending == 0) {
1563                 if (ctx->errors)
1564                         dev_err(&ctx->dev->intf->dev,
1565                                 "iso test, %lu errors out of %lu\n",
1566                                 ctx->errors, ctx->packet_count);
1567                 complete(&ctx->done);
1568         }
1569 done:
1570         spin_unlock(&ctx->lock);
1571 }
1572
1573 static struct urb *iso_alloc_urb(
1574         struct usb_device       *udev,
1575         int                     pipe,
1576         struct usb_endpoint_descriptor  *desc,
1577         long                    bytes,
1578         unsigned offset
1579 )
1580 {
1581         struct urb              *urb;
1582         unsigned                i, maxp, packets;
1583
1584         if (bytes < 0 || !desc)
1585                 return NULL;
1586         maxp = 0x7ff & le16_to_cpu(desc->wMaxPacketSize);
1587         maxp *= 1 + (0x3 & (le16_to_cpu(desc->wMaxPacketSize) >> 11));
1588         packets = DIV_ROUND_UP(bytes, maxp);
1589
1590         urb = usb_alloc_urb(packets, GFP_KERNEL);
1591         if (!urb)
1592                 return urb;
1593         urb->dev = udev;
1594         urb->pipe = pipe;
1595
1596         urb->number_of_packets = packets;
1597         urb->transfer_buffer_length = bytes;
1598         urb->transfer_buffer = usb_alloc_coherent(udev, bytes + offset,
1599                                                         GFP_KERNEL,
1600                                                         &urb->transfer_dma);
1601         if (!urb->transfer_buffer) {
1602                 usb_free_urb(urb);
1603                 return NULL;
1604         }
1605         if (offset) {
1606                 memset(urb->transfer_buffer, GUARD_BYTE, offset);
1607                 urb->transfer_buffer += offset;
1608                 urb->transfer_dma += offset;
1609         }
1610         /* For inbound transfers use guard byte so that test fails if
1611                 data not correctly copied */
1612         memset(urb->transfer_buffer,
1613                         usb_pipein(urb->pipe) ? GUARD_BYTE : 0,
1614                         bytes);
1615
1616         for (i = 0; i < packets; i++) {
1617                 /* here, only the last packet will be short */
1618                 urb->iso_frame_desc[i].length = min((unsigned) bytes, maxp);
1619                 bytes -= urb->iso_frame_desc[i].length;
1620
1621                 urb->iso_frame_desc[i].offset = maxp * i;
1622         }
1623
1624         urb->complete = iso_callback;
1625         /* urb->context = SET BY CALLER */
1626         urb->interval = 1 << (desc->bInterval - 1);
1627         urb->transfer_flags = URB_ISO_ASAP | URB_NO_TRANSFER_DMA_MAP;
1628         return urb;
1629 }
1630
1631 static int
1632 test_iso_queue(struct usbtest_dev *dev, struct usbtest_param *param,
1633                 int pipe, struct usb_endpoint_descriptor *desc, unsigned offset)
1634 {
1635         struct iso_context      context;
1636         struct usb_device       *udev;
1637         unsigned                i;
1638         unsigned long           packets = 0;
1639         int                     status = 0;
1640         struct urb              *urbs[10];      /* FIXME no limit */
1641
1642         if (param->sglen > 10)
1643                 return -EDOM;
1644
1645         memset(&context, 0, sizeof context);
1646         context.count = param->iterations * param->sglen;
1647         context.dev = dev;
1648         init_completion(&context.done);
1649         spin_lock_init(&context.lock);
1650
1651         memset(urbs, 0, sizeof urbs);
1652         udev = testdev_to_usbdev(dev);
1653         dev_info(&dev->intf->dev,
1654                 "... iso period %d %sframes, wMaxPacket %04x\n",
1655                 1 << (desc->bInterval - 1),
1656                 (udev->speed == USB_SPEED_HIGH) ? "micro" : "",
1657                 le16_to_cpu(desc->wMaxPacketSize));
1658
1659         for (i = 0; i < param->sglen; i++) {
1660                 urbs[i] = iso_alloc_urb(udev, pipe, desc,
1661                                         param->length, offset);
1662                 if (!urbs[i]) {
1663                         status = -ENOMEM;
1664                         goto fail;
1665                 }
1666                 packets += urbs[i]->number_of_packets;
1667                 urbs[i]->context = &context;
1668         }
1669         packets *= param->iterations;
1670         dev_info(&dev->intf->dev,
1671                 "... total %lu msec (%lu packets)\n",
1672                 (packets * (1 << (desc->bInterval - 1)))
1673                         / ((udev->speed == USB_SPEED_HIGH) ? 8 : 1),
1674                 packets);
1675
1676         spin_lock_irq(&context.lock);
1677         for (i = 0; i < param->sglen; i++) {
1678                 ++context.pending;
1679                 status = usb_submit_urb(urbs[i], GFP_ATOMIC);
1680                 if (status < 0) {
1681                         ERROR(dev, "submit iso[%d], error %d\n", i, status);
1682                         if (i == 0) {
1683                                 spin_unlock_irq(&context.lock);
1684                                 goto fail;
1685                         }
1686
1687                         simple_free_urb(urbs[i]);
1688                         urbs[i] = NULL;
1689                         context.pending--;
1690                         context.submit_error = 1;
1691                         break;
1692                 }
1693         }
1694         spin_unlock_irq(&context.lock);
1695
1696         wait_for_completion(&context.done);
1697
1698         for (i = 0; i < param->sglen; i++) {
1699                 if (urbs[i])
1700                         simple_free_urb(urbs[i]);
1701         }
1702         /*
1703          * Isochronous transfers are expected to fail sometimes.  As an
1704          * arbitrary limit, we will report an error if any submissions
1705          * fail or if the transfer failure rate is > 10%.
1706          */
1707         if (status != 0)
1708                 ;
1709         else if (context.submit_error)
1710                 status = -EACCES;
1711         else if (context.errors > context.packet_count / 10)
1712                 status = -EIO;
1713         return status;
1714
1715 fail:
1716         for (i = 0; i < param->sglen; i++) {
1717                 if (urbs[i])
1718                         simple_free_urb(urbs[i]);
1719         }
1720         return status;
1721 }
1722
1723 static int test_unaligned_bulk(
1724         struct usbtest_dev *tdev,
1725         int pipe,
1726         unsigned length,
1727         int iterations,
1728         unsigned transfer_flags,
1729         const char *label)
1730 {
1731         int retval;
1732         struct urb *urb = usbtest_alloc_urb(
1733                 testdev_to_usbdev(tdev), pipe, length, transfer_flags, 1);
1734
1735         if (!urb)
1736                 return -ENOMEM;
1737
1738         retval = simple_io(tdev, urb, iterations, 0, 0, label);
1739         simple_free_urb(urb);
1740         return retval;
1741 }
1742
1743 /*-------------------------------------------------------------------------*/
1744
1745 /* We only have this one interface to user space, through usbfs.
1746  * User mode code can scan usbfs to find N different devices (maybe on
1747  * different busses) to use when testing, and allocate one thread per
1748  * test.  So discovery is simplified, and we have no device naming issues.
1749  *
1750  * Don't use these only as stress/load tests.  Use them along with with
1751  * other USB bus activity:  plugging, unplugging, mousing, mp3 playback,
1752  * video capture, and so on.  Run different tests at different times, in
1753  * different sequences.  Nothing here should interact with other devices,
1754  * except indirectly by consuming USB bandwidth and CPU resources for test
1755  * threads and request completion.  But the only way to know that for sure
1756  * is to test when HC queues are in use by many devices.
1757  *
1758  * WARNING:  Because usbfs grabs udev->dev.sem before calling this ioctl(),
1759  * it locks out usbcore in certain code paths.  Notably, if you disconnect
1760  * the device-under-test, khubd will wait block forever waiting for the
1761  * ioctl to complete ... so that usb_disconnect() can abort the pending
1762  * urbs and then call usbtest_disconnect().  To abort a test, you're best
1763  * off just killing the userspace task and waiting for it to exit.
1764  */
1765
1766 /* No BKL needed */
1767 static int
1768 usbtest_ioctl(struct usb_interface *intf, unsigned int code, void *buf)
1769 {
1770         struct usbtest_dev      *dev = usb_get_intfdata(intf);
1771         struct usb_device       *udev = testdev_to_usbdev(dev);
1772         struct usbtest_param    *param = buf;
1773         int                     retval = -EOPNOTSUPP;
1774         struct urb              *urb;
1775         struct scatterlist      *sg;
1776         struct usb_sg_request   req;
1777         struct timeval          start;
1778         unsigned                i;
1779
1780         /* FIXME USBDEVFS_CONNECTINFO doesn't say how fast the device is. */
1781
1782         pattern = mod_pattern;
1783
1784         if (code != USBTEST_REQUEST)
1785                 return -EOPNOTSUPP;
1786
1787         if (param->iterations <= 0)
1788                 return -EINVAL;
1789
1790         if (mutex_lock_interruptible(&dev->lock))
1791                 return -ERESTARTSYS;
1792
1793         /* FIXME: What if a system sleep starts while a test is running? */
1794
1795         /* some devices, like ez-usb default devices, need a non-default
1796          * altsetting to have any active endpoints.  some tests change
1797          * altsettings; force a default so most tests don't need to check.
1798          */
1799         if (dev->info->alt >= 0) {
1800                 int     res;
1801
1802                 if (intf->altsetting->desc.bInterfaceNumber) {
1803                         mutex_unlock(&dev->lock);
1804                         return -ENODEV;
1805                 }
1806                 res = set_altsetting(dev, dev->info->alt);
1807                 if (res) {
1808                         dev_err(&intf->dev,
1809                                         "set altsetting to %d failed, %d\n",
1810                                         dev->info->alt, res);
1811                         mutex_unlock(&dev->lock);
1812                         return res;
1813                 }
1814         }
1815
1816         /*
1817          * Just a bunch of test cases that every HCD is expected to handle.
1818          *
1819          * Some may need specific firmware, though it'd be good to have
1820          * one firmware image to handle all the test cases.
1821          *
1822          * FIXME add more tests!  cancel requests, verify the data, control
1823          * queueing, concurrent read+write threads, and so on.
1824          */
1825         do_gettimeofday(&start);
1826         switch (param->test_num) {
1827
1828         case 0:
1829                 dev_info(&intf->dev, "TEST 0:  NOP\n");
1830                 retval = 0;
1831                 break;
1832
1833         /* Simple non-queued bulk I/O tests */
1834         case 1:
1835                 if (dev->out_pipe == 0)
1836                         break;
1837                 dev_info(&intf->dev,
1838                                 "TEST 1:  write %d bytes %u times\n",
1839                                 param->length, param->iterations);
1840                 urb = simple_alloc_urb(udev, dev->out_pipe, param->length);
1841                 if (!urb) {
1842                         retval = -ENOMEM;
1843                         break;
1844                 }
1845                 /* FIRMWARE:  bulk sink (maybe accepts short writes) */
1846                 retval = simple_io(dev, urb, param->iterations, 0, 0, "test1");
1847                 simple_free_urb(urb);
1848                 break;
1849         case 2:
1850                 if (dev->in_pipe == 0)
1851                         break;
1852                 dev_info(&intf->dev,
1853                                 "TEST 2:  read %d bytes %u times\n",
1854                                 param->length, param->iterations);
1855                 urb = simple_alloc_urb(udev, dev->in_pipe, param->length);
1856                 if (!urb) {
1857                         retval = -ENOMEM;
1858                         break;
1859                 }
1860                 /* FIRMWARE:  bulk source (maybe generates short writes) */
1861                 retval = simple_io(dev, urb, param->iterations, 0, 0, "test2");
1862                 simple_free_urb(urb);
1863                 break;
1864         case 3:
1865                 if (dev->out_pipe == 0 || param->vary == 0)
1866                         break;
1867                 dev_info(&intf->dev,
1868                                 "TEST 3:  write/%d 0..%d bytes %u times\n",
1869                                 param->vary, param->length, param->iterations);
1870                 urb = simple_alloc_urb(udev, dev->out_pipe, param->length);
1871                 if (!urb) {
1872                         retval = -ENOMEM;
1873                         break;
1874                 }
1875                 /* FIRMWARE:  bulk sink (maybe accepts short writes) */
1876                 retval = simple_io(dev, urb, param->iterations, param->vary,
1877                                         0, "test3");
1878                 simple_free_urb(urb);
1879                 break;
1880         case 4:
1881                 if (dev->in_pipe == 0 || param->vary == 0)
1882                         break;
1883                 dev_info(&intf->dev,
1884                                 "TEST 4:  read/%d 0..%d bytes %u times\n",
1885                                 param->vary, param->length, param->iterations);
1886                 urb = simple_alloc_urb(udev, dev->in_pipe, param->length);
1887                 if (!urb) {
1888                         retval = -ENOMEM;
1889                         break;
1890                 }
1891                 /* FIRMWARE:  bulk source (maybe generates short writes) */
1892                 retval = simple_io(dev, urb, param->iterations, param->vary,
1893                                         0, "test4");
1894                 simple_free_urb(urb);
1895                 break;
1896
1897         /* Queued bulk I/O tests */
1898         case 5:
1899                 if (dev->out_pipe == 0 || param->sglen == 0)
1900                         break;
1901                 dev_info(&intf->dev,
1902                         "TEST 5:  write %d sglists %d entries of %d bytes\n",
1903                                 param->iterations,
1904                                 param->sglen, param->length);
1905                 sg = alloc_sglist(param->sglen, param->length, 0);
1906                 if (!sg) {
1907                         retval = -ENOMEM;
1908                         break;
1909                 }
1910                 /* FIRMWARE:  bulk sink (maybe accepts short writes) */
1911                 retval = perform_sglist(dev, param->iterations, dev->out_pipe,
1912                                 &req, sg, param->sglen);
1913                 free_sglist(sg, param->sglen);
1914                 break;
1915
1916         case 6:
1917                 if (dev->in_pipe == 0 || param->sglen == 0)
1918                         break;
1919                 dev_info(&intf->dev,
1920                         "TEST 6:  read %d sglists %d entries of %d bytes\n",
1921                                 param->iterations,
1922                                 param->sglen, param->length);
1923                 sg = alloc_sglist(param->sglen, param->length, 0);
1924                 if (!sg) {
1925                         retval = -ENOMEM;
1926                         break;
1927                 }
1928                 /* FIRMWARE:  bulk source (maybe generates short writes) */
1929                 retval = perform_sglist(dev, param->iterations, dev->in_pipe,
1930                                 &req, sg, param->sglen);
1931                 free_sglist(sg, param->sglen);
1932                 break;
1933         case 7:
1934                 if (dev->out_pipe == 0 || param->sglen == 0 || param->vary == 0)
1935                         break;
1936                 dev_info(&intf->dev,
1937                         "TEST 7:  write/%d %d sglists %d entries 0..%d bytes\n",
1938                                 param->vary, param->iterations,
1939                                 param->sglen, param->length);
1940                 sg = alloc_sglist(param->sglen, param->length, param->vary);
1941                 if (!sg) {
1942                         retval = -ENOMEM;
1943                         break;
1944                 }
1945                 /* FIRMWARE:  bulk sink (maybe accepts short writes) */
1946                 retval = perform_sglist(dev, param->iterations, dev->out_pipe,
1947                                 &req, sg, param->sglen);
1948                 free_sglist(sg, param->sglen);
1949                 break;
1950         case 8:
1951                 if (dev->in_pipe == 0 || param->sglen == 0 || param->vary == 0)
1952                         break;
1953                 dev_info(&intf->dev,
1954                         "TEST 8:  read/%d %d sglists %d entries 0..%d bytes\n",
1955                                 param->vary, param->iterations,
1956                                 param->sglen, param->length);
1957                 sg = alloc_sglist(param->sglen, param->length, param->vary);
1958                 if (!sg) {
1959                         retval = -ENOMEM;
1960                         break;
1961                 }
1962                 /* FIRMWARE:  bulk source (maybe generates short writes) */
1963                 retval = perform_sglist(dev, param->iterations, dev->in_pipe,
1964                                 &req, sg, param->sglen);
1965                 free_sglist(sg, param->sglen);
1966                 break;
1967
1968         /* non-queued sanity tests for control (chapter 9 subset) */
1969         case 9:
1970                 retval = 0;
1971                 dev_info(&intf->dev,
1972                         "TEST 9:  ch9 (subset) control tests, %d times\n",
1973                                 param->iterations);
1974                 for (i = param->iterations; retval == 0 && i--; /* NOP */)
1975                         retval = ch9_postconfig(dev);
1976                 if (retval)
1977                         dev_err(&intf->dev, "ch9 subset failed, "
1978                                         "iterations left %d\n", i);
1979                 break;
1980
1981         /* queued control messaging */
1982         case 10:
1983                 if (param->sglen == 0)
1984                         break;
1985                 retval = 0;
1986                 dev_info(&intf->dev,
1987                                 "TEST 10:  queue %d control calls, %d times\n",
1988                                 param->sglen,
1989                                 param->iterations);
1990                 retval = test_ctrl_queue(dev, param);
1991                 break;
1992
1993         /* simple non-queued unlinks (ring with one urb) */
1994         case 11:
1995                 if (dev->in_pipe == 0 || !param->length)
1996                         break;
1997                 retval = 0;
1998                 dev_info(&intf->dev, "TEST 11:  unlink %d reads of %d\n",
1999                                 param->iterations, param->length);
2000                 for (i = param->iterations; retval == 0 && i--; /* NOP */)
2001                         retval = unlink_simple(dev, dev->in_pipe,
2002                                                 param->length);
2003                 if (retval)
2004                         dev_err(&intf->dev, "unlink reads failed %d, "
2005                                 "iterations left %d\n", retval, i);
2006                 break;
2007         case 12:
2008                 if (dev->out_pipe == 0 || !param->length)
2009                         break;
2010                 retval = 0;
2011                 dev_info(&intf->dev, "TEST 12:  unlink %d writes of %d\n",
2012                                 param->iterations, param->length);
2013                 for (i = param->iterations; retval == 0 && i--; /* NOP */)
2014                         retval = unlink_simple(dev, dev->out_pipe,
2015                                                 param->length);
2016                 if (retval)
2017                         dev_err(&intf->dev, "unlink writes failed %d, "
2018                                 "iterations left %d\n", retval, i);
2019                 break;
2020
2021         /* ep halt tests */
2022         case 13:
2023                 if (dev->out_pipe == 0 && dev->in_pipe == 0)
2024                         break;
2025                 retval = 0;
2026                 dev_info(&intf->dev, "TEST 13:  set/clear %d halts\n",
2027                                 param->iterations);
2028                 for (i = param->iterations; retval == 0 && i--; /* NOP */)
2029                         retval = halt_simple(dev);
2030
2031                 if (retval)
2032                         ERROR(dev, "halts failed, iterations left %d\n", i);
2033                 break;
2034
2035         /* control write tests */
2036         case 14:
2037                 if (!dev->info->ctrl_out)
2038                         break;
2039                 dev_info(&intf->dev, "TEST 14:  %d ep0out, %d..%d vary %d\n",
2040                                 param->iterations,
2041                                 realworld ? 1 : 0, param->length,
2042                                 param->vary);
2043                 retval = ctrl_out(dev, param->iterations,
2044                                 param->length, param->vary, 0);
2045                 break;
2046
2047         /* iso write tests */
2048         case 15:
2049                 if (dev->out_iso_pipe == 0 || param->sglen == 0)
2050                         break;
2051                 dev_info(&intf->dev,
2052                         "TEST 15:  write %d iso, %d entries of %d bytes\n",
2053                                 param->iterations,
2054                                 param->sglen, param->length);
2055                 /* FIRMWARE:  iso sink */
2056                 retval = test_iso_queue(dev, param,
2057                                 dev->out_iso_pipe, dev->iso_out, 0);
2058                 break;
2059
2060         /* iso read tests */
2061         case 16:
2062                 if (dev->in_iso_pipe == 0 || param->sglen == 0)
2063                         break;
2064                 dev_info(&intf->dev,
2065                         "TEST 16:  read %d iso, %d entries of %d bytes\n",
2066                                 param->iterations,
2067                                 param->sglen, param->length);
2068                 /* FIRMWARE:  iso source */
2069                 retval = test_iso_queue(dev, param,
2070                                 dev->in_iso_pipe, dev->iso_in, 0);
2071                 break;
2072
2073         /* FIXME scatterlist cancel (needs helper thread) */
2074
2075         /* Tests for bulk I/O using DMA mapping by core and odd address */
2076         case 17:
2077                 if (dev->out_pipe == 0)
2078                         break;
2079                 dev_info(&intf->dev,
2080                         "TEST 17:  write odd addr %d bytes %u times core map\n",
2081                         param->length, param->iterations);
2082
2083                 retval = test_unaligned_bulk(
2084                                 dev, dev->out_pipe,
2085                                 param->length, param->iterations,
2086                                 0, "test17");
2087                 break;
2088
2089         case 18:
2090                 if (dev->in_pipe == 0)
2091                         break;
2092                 dev_info(&intf->dev,
2093                         "TEST 18:  read odd addr %d bytes %u times core map\n",
2094                         param->length, param->iterations);
2095
2096                 retval = test_unaligned_bulk(
2097                                 dev, dev->in_pipe,
2098                                 param->length, param->iterations,
2099                                 0, "test18");
2100                 break;
2101
2102         /* Tests for bulk I/O using premapped coherent buffer and odd address */
2103         case 19:
2104                 if (dev->out_pipe == 0)
2105                         break;
2106                 dev_info(&intf->dev,
2107                         "TEST 19:  write odd addr %d bytes %u times premapped\n",
2108                         param->length, param->iterations);
2109
2110                 retval = test_unaligned_bulk(
2111                                 dev, dev->out_pipe,
2112                                 param->length, param->iterations,
2113                                 URB_NO_TRANSFER_DMA_MAP, "test19");
2114                 break;
2115
2116         case 20:
2117                 if (dev->in_pipe == 0)
2118                         break;
2119                 dev_info(&intf->dev,
2120                         "TEST 20:  read odd addr %d bytes %u times premapped\n",
2121                         param->length, param->iterations);
2122
2123                 retval = test_unaligned_bulk(
2124                                 dev, dev->in_pipe,
2125                                 param->length, param->iterations,
2126                                 URB_NO_TRANSFER_DMA_MAP, "test20");
2127                 break;
2128
2129         /* control write tests with unaligned buffer */
2130         case 21:
2131                 if (!dev->info->ctrl_out)
2132                         break;
2133                 dev_info(&intf->dev,
2134                                 "TEST 21:  %d ep0out odd addr, %d..%d vary %d\n",
2135                                 param->iterations,
2136                                 realworld ? 1 : 0, param->length,
2137                                 param->vary);
2138                 retval = ctrl_out(dev, param->iterations,
2139                                 param->length, param->vary, 1);
2140                 break;
2141
2142         /* unaligned iso tests */
2143         case 22:
2144                 if (dev->out_iso_pipe == 0 || param->sglen == 0)
2145                         break;
2146                 dev_info(&intf->dev,
2147                         "TEST 22:  write %d iso odd, %d entries of %d bytes\n",
2148                                 param->iterations,
2149                                 param->sglen, param->length);
2150                 retval = test_iso_queue(dev, param,
2151                                 dev->out_iso_pipe, dev->iso_out, 1);
2152                 break;
2153
2154         case 23:
2155                 if (dev->in_iso_pipe == 0 || param->sglen == 0)
2156                         break;
2157                 dev_info(&intf->dev,
2158                         "TEST 23:  read %d iso odd, %d entries of %d bytes\n",
2159                                 param->iterations,
2160                                 param->sglen, param->length);
2161                 retval = test_iso_queue(dev, param,
2162                                 dev->in_iso_pipe, dev->iso_in, 1);
2163                 break;
2164
2165         /* unlink URBs from a bulk-OUT queue */
2166         case 24:
2167                 if (dev->out_pipe == 0 || !param->length || param->sglen < 4)
2168                         break;
2169                 retval = 0;
2170                 dev_info(&intf->dev, "TEST 17:  unlink from %d queues of "
2171                                 "%d %d-byte writes\n",
2172                                 param->iterations, param->sglen, param->length);
2173                 for (i = param->iterations; retval == 0 && i > 0; --i) {
2174                         retval = unlink_queued(dev, dev->out_pipe,
2175                                                 param->sglen, param->length);
2176                         if (retval) {
2177                                 dev_err(&intf->dev,
2178                                         "unlink queued writes failed %d, "
2179                                         "iterations left %d\n", retval, i);
2180                                 break;
2181                         }
2182                 }
2183                 break;
2184
2185         }
2186         do_gettimeofday(&param->duration);
2187         param->duration.tv_sec -= start.tv_sec;
2188         param->duration.tv_usec -= start.tv_usec;
2189         if (param->duration.tv_usec < 0) {
2190                 param->duration.tv_usec += 1000 * 1000;
2191                 param->duration.tv_sec -= 1;
2192         }
2193         mutex_unlock(&dev->lock);
2194         return retval;
2195 }
2196
2197 /*-------------------------------------------------------------------------*/
2198
2199 static unsigned force_interrupt;
2200 module_param(force_interrupt, uint, 0);
2201 MODULE_PARM_DESC(force_interrupt, "0 = test default; else interrupt");
2202
2203 #ifdef  GENERIC
2204 static unsigned short vendor;
2205 module_param(vendor, ushort, 0);
2206 MODULE_PARM_DESC(vendor, "vendor code (from usb-if)");
2207
2208 static unsigned short product;
2209 module_param(product, ushort, 0);
2210 MODULE_PARM_DESC(product, "product code (from vendor)");
2211 #endif
2212
2213 static int
2214 usbtest_probe(struct usb_interface *intf, const struct usb_device_id *id)
2215 {
2216         struct usb_device       *udev;
2217         struct usbtest_dev      *dev;
2218         struct usbtest_info     *info;
2219         char                    *rtest, *wtest;
2220         char                    *irtest, *iwtest;
2221
2222         udev = interface_to_usbdev(intf);
2223
2224 #ifdef  GENERIC
2225         /* specify devices by module parameters? */
2226         if (id->match_flags == 0) {
2227                 /* vendor match required, product match optional */
2228                 if (!vendor || le16_to_cpu(udev->descriptor.idVendor) != (u16)vendor)
2229                         return -ENODEV;
2230                 if (product && le16_to_cpu(udev->descriptor.idProduct) != (u16)product)
2231                         return -ENODEV;
2232                 dev_info(&intf->dev, "matched module params, "
2233                                         "vend=0x%04x prod=0x%04x\n",
2234                                 le16_to_cpu(udev->descriptor.idVendor),
2235                                 le16_to_cpu(udev->descriptor.idProduct));
2236         }
2237 #endif
2238
2239         dev = kzalloc(sizeof(*dev), GFP_KERNEL);
2240         if (!dev)
2241                 return -ENOMEM;
2242         info = (struct usbtest_info *) id->driver_info;
2243         dev->info = info;
2244         mutex_init(&dev->lock);
2245
2246         dev->intf = intf;
2247
2248         /* cacheline-aligned scratch for i/o */
2249         dev->buf = kmalloc(TBUF_SIZE, GFP_KERNEL);
2250         if (dev->buf == NULL) {
2251                 kfree(dev);
2252                 return -ENOMEM;
2253         }
2254
2255         /* NOTE this doesn't yet test the handful of difference that are
2256          * visible with high speed interrupts:  bigger maxpacket (1K) and
2257          * "high bandwidth" modes (up to 3 packets/uframe).
2258          */
2259         rtest = wtest = "";
2260         irtest = iwtest = "";
2261         if (force_interrupt || udev->speed == USB_SPEED_LOW) {
2262                 if (info->ep_in) {
2263                         dev->in_pipe = usb_rcvintpipe(udev, info->ep_in);
2264                         rtest = " intr-in";
2265                 }
2266                 if (info->ep_out) {
2267                         dev->out_pipe = usb_sndintpipe(udev, info->ep_out);
2268                         wtest = " intr-out";
2269                 }
2270         } else {
2271                 if (info->autoconf) {
2272                         int status;
2273
2274                         status = get_endpoints(dev, intf);
2275                         if (status < 0) {
2276                                 WARNING(dev, "couldn't get endpoints, %d\n",
2277                                                 status);
2278                                 return status;
2279                         }
2280                         /* may find bulk or ISO pipes */
2281                 } else {
2282                         if (info->ep_in)
2283                                 dev->in_pipe = usb_rcvbulkpipe(udev,
2284                                                         info->ep_in);
2285                         if (info->ep_out)
2286                                 dev->out_pipe = usb_sndbulkpipe(udev,
2287                                                         info->ep_out);
2288                 }
2289                 if (dev->in_pipe)
2290                         rtest = " bulk-in";
2291                 if (dev->out_pipe)
2292                         wtest = " bulk-out";
2293                 if (dev->in_iso_pipe)
2294                         irtest = " iso-in";
2295                 if (dev->out_iso_pipe)
2296                         iwtest = " iso-out";
2297         }
2298
2299         usb_set_intfdata(intf, dev);
2300         dev_info(&intf->dev, "%s\n", info->name);
2301         dev_info(&intf->dev, "%s speed {control%s%s%s%s%s} tests%s\n",
2302                         ({ char *tmp;
2303                         switch (udev->speed) {
2304                         case USB_SPEED_LOW:
2305                                 tmp = "low";
2306                                 break;
2307                         case USB_SPEED_FULL:
2308                                 tmp = "full";
2309                                 break;
2310                         case USB_SPEED_HIGH:
2311                                 tmp = "high";
2312                                 break;
2313                         case USB_SPEED_SUPER:
2314                                 tmp = "super";
2315                                 break;
2316                         default:
2317                                 tmp = "unknown";
2318                                 break;
2319                         }; tmp; }),
2320                         info->ctrl_out ? " in/out" : "",
2321                         rtest, wtest,
2322                         irtest, iwtest,
2323                         info->alt >= 0 ? " (+alt)" : "");
2324         return 0;
2325 }
2326
2327 static int usbtest_suspend(struct usb_interface *intf, pm_message_t message)
2328 {
2329         return 0;
2330 }
2331
2332 static int usbtest_resume(struct usb_interface *intf)
2333 {
2334         return 0;
2335 }
2336
2337
2338 static void usbtest_disconnect(struct usb_interface *intf)
2339 {
2340         struct usbtest_dev      *dev = usb_get_intfdata(intf);
2341
2342         usb_set_intfdata(intf, NULL);
2343         dev_dbg(&intf->dev, "disconnect\n");
2344         kfree(dev);
2345 }
2346
2347 /* Basic testing only needs a device that can source or sink bulk traffic.
2348  * Any device can test control transfers (default with GENERIC binding).
2349  *
2350  * Several entries work with the default EP0 implementation that's built
2351  * into EZ-USB chips.  There's a default vendor ID which can be overridden
2352  * by (very) small config EEPROMS, but otherwise all these devices act
2353  * identically until firmware is loaded:  only EP0 works.  It turns out
2354  * to be easy to make other endpoints work, without modifying that EP0
2355  * behavior.  For now, we expect that kind of firmware.
2356  */
2357
2358 /* an21xx or fx versions of ez-usb */
2359 static struct usbtest_info ez1_info = {
2360         .name           = "EZ-USB device",
2361         .ep_in          = 2,
2362         .ep_out         = 2,
2363         .alt            = 1,
2364 };
2365
2366 /* fx2 version of ez-usb */
2367 static struct usbtest_info ez2_info = {
2368         .name           = "FX2 device",
2369         .ep_in          = 6,
2370         .ep_out         = 2,
2371         .alt            = 1,
2372 };
2373
2374 /* ezusb family device with dedicated usb test firmware,
2375  */
2376 static struct usbtest_info fw_info = {
2377         .name           = "usb test device",
2378         .ep_in          = 2,
2379         .ep_out         = 2,
2380         .alt            = 1,
2381         .autoconf       = 1,            /* iso and ctrl_out need autoconf */
2382         .ctrl_out       = 1,
2383         .iso            = 1,            /* iso_ep's are #8 in/out */
2384 };
2385
2386 /* peripheral running Linux and 'zero.c' test firmware, or
2387  * its user-mode cousin. different versions of this use
2388  * different hardware with the same vendor/product codes.
2389  * host side MUST rely on the endpoint descriptors.
2390  */
2391 static struct usbtest_info gz_info = {
2392         .name           = "Linux gadget zero",
2393         .autoconf       = 1,
2394         .ctrl_out       = 1,
2395         .alt            = 0,
2396 };
2397
2398 static struct usbtest_info um_info = {
2399         .name           = "Linux user mode test driver",
2400         .autoconf       = 1,
2401         .alt            = -1,
2402 };
2403
2404 static struct usbtest_info um2_info = {
2405         .name           = "Linux user mode ISO test driver",
2406         .autoconf       = 1,
2407         .iso            = 1,
2408         .alt            = -1,
2409 };
2410
2411 #ifdef IBOT2
2412 /* this is a nice source of high speed bulk data;
2413  * uses an FX2, with firmware provided in the device
2414  */
2415 static struct usbtest_info ibot2_info = {
2416         .name           = "iBOT2 webcam",
2417         .ep_in          = 2,
2418         .alt            = -1,
2419 };
2420 #endif
2421
2422 #ifdef GENERIC
2423 /* we can use any device to test control traffic */
2424 static struct usbtest_info generic_info = {
2425         .name           = "Generic USB device",
2426         .alt            = -1,
2427 };
2428 #endif
2429
2430
2431 static const struct usb_device_id id_table[] = {
2432
2433         /*-------------------------------------------------------------*/
2434
2435         /* EZ-USB devices which download firmware to replace (or in our
2436          * case augment) the default device implementation.
2437          */
2438
2439         /* generic EZ-USB FX controller */
2440         { USB_DEVICE(0x0547, 0x2235),
2441                 .driver_info = (unsigned long) &ez1_info,
2442         },
2443
2444         /* CY3671 development board with EZ-USB FX */
2445         { USB_DEVICE(0x0547, 0x0080),
2446                 .driver_info = (unsigned long) &ez1_info,
2447         },
2448
2449         /* generic EZ-USB FX2 controller (or development board) */
2450         { USB_DEVICE(0x04b4, 0x8613),
2451                 .driver_info = (unsigned long) &ez2_info,
2452         },
2453
2454         /* re-enumerated usb test device firmware */
2455         { USB_DEVICE(0xfff0, 0xfff0),
2456                 .driver_info = (unsigned long) &fw_info,
2457         },
2458
2459         /* "Gadget Zero" firmware runs under Linux */
2460         { USB_DEVICE(0x0525, 0xa4a0),
2461                 .driver_info = (unsigned long) &gz_info,
2462         },
2463
2464         /* so does a user-mode variant */
2465         { USB_DEVICE(0x0525, 0xa4a4),
2466                 .driver_info = (unsigned long) &um_info,
2467         },
2468
2469         /* ... and a user-mode variant that talks iso */
2470         { USB_DEVICE(0x0525, 0xa4a3),
2471                 .driver_info = (unsigned long) &um2_info,
2472         },
2473
2474 #ifdef KEYSPAN_19Qi
2475         /* Keyspan 19qi uses an21xx (original EZ-USB) */
2476         /* this does not coexist with the real Keyspan 19qi driver! */
2477         { USB_DEVICE(0x06cd, 0x010b),
2478                 .driver_info = (unsigned long) &ez1_info,
2479         },
2480 #endif
2481
2482         /*-------------------------------------------------------------*/
2483
2484 #ifdef IBOT2
2485         /* iBOT2 makes a nice source of high speed bulk-in data */
2486         /* this does not coexist with a real iBOT2 driver! */
2487         { USB_DEVICE(0x0b62, 0x0059),
2488                 .driver_info = (unsigned long) &ibot2_info,
2489         },
2490 #endif
2491
2492         /*-------------------------------------------------------------*/
2493
2494 #ifdef GENERIC
2495         /* module params can specify devices to use for control tests */
2496         { .driver_info = (unsigned long) &generic_info, },
2497 #endif
2498
2499         /*-------------------------------------------------------------*/
2500
2501         { }
2502 };
2503 MODULE_DEVICE_TABLE(usb, id_table);
2504
2505 static struct usb_driver usbtest_driver = {
2506         .name =         "usbtest",
2507         .id_table =     id_table,
2508         .probe =        usbtest_probe,
2509         .unlocked_ioctl = usbtest_ioctl,
2510         .disconnect =   usbtest_disconnect,
2511         .suspend =      usbtest_suspend,
2512         .resume =       usbtest_resume,
2513 };
2514
2515 /*-------------------------------------------------------------------------*/
2516
2517 static int __init usbtest_init(void)
2518 {
2519 #ifdef GENERIC
2520         if (vendor)
2521                 pr_debug("params: vend=0x%04x prod=0x%04x\n", vendor, product);
2522 #endif
2523         return usb_register(&usbtest_driver);
2524 }
2525 module_init(usbtest_init);
2526
2527 static void __exit usbtest_exit(void)
2528 {
2529         usb_deregister(&usbtest_driver);
2530 }
2531 module_exit(usbtest_exit);
2532
2533 MODULE_DESCRIPTION("USB Core/HCD Testing Driver");
2534 MODULE_LICENSE("GPL");
2535