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 altsetttings.
 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 buffer_offset(void *buf)
 272 {
 273         return (unsigned)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 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                         switch (len) {
1034                         case 8:
1035                                 len = 24;
1036                                 break;
1037                         case 16:
1038                                 len = 32;
1039                                 break;
1040                         }
1041                         expected = -EREMOTEIO;
1042                         break;
1043                 default:
1044                         ERROR(dev, "bogus number of ctrl queue testcases!\n");
1045                         context.status = -EINVAL;
1046                         goto cleanup;
1047                 }
1048                 req.wLength = cpu_to_le16(len);
1049                 urb[i] = u = simple_alloc_urb(udev, pipe, len);
1050                 if (!u)
1051                         goto cleanup;
1052
1053                 reqp = kmalloc(sizeof *reqp, GFP_KERNEL);
1054                 if (!reqp)
1055                         goto cleanup;
1056                 reqp->setup = req;
1057                 reqp->number = i % NUM_SUBCASES;
1058                 reqp->expected = expected;
1059                 u->setup_packet = (char *) &reqp->setup;
1060
1061                 u->context = &context;
1062                 u->complete = ctrl_complete;
1063         }
1064
1065         /* queue the urbs */
1066         context.urb = urb;
1067         spin_lock_irq(&context.lock);
1068         for (i = 0; i < param->sglen; i++) {
1069                 context.status = usb_submit_urb(urb[i], GFP_ATOMIC);
1070                 if (context.status != 0) {
1071                         ERROR(dev, "can't submit urb[%d], status %d\n",
1072                                         i, context.status);
1073                         context.count = context.pending;
1074                         break;
1075                 }
1076                 context.pending++;
1077         }
1078         spin_unlock_irq(&context.lock);
1079
1080         /* FIXME  set timer and time out; provide a disconnect hook */
1081
1082         /* wait for the last one to complete */
1083         if (context.pending > 0)
1084                 wait_for_completion(&context.complete);
1085
1086 cleanup:
1087         for (i = 0; i < param->sglen; i++) {
1088                 if (!urb[i])
1089                         continue;
1090                 urb[i]->dev = udev;
1091                 kfree(urb[i]->setup_packet);
1092                 simple_free_urb(urb[i]);
1093         }
1094         kfree(urb);
1095         return context.status;
1096 }
1097 #undef NUM_SUBCASES
1098
1099
1100 /*-------------------------------------------------------------------------*/
1101
1102 static void unlink1_callback(struct urb *urb)
1103 {
1104         int     status = urb->status;
1105
1106         /* we "know" -EPIPE (stall) never happens */
1107         if (!status)
1108                 status = usb_submit_urb(urb, GFP_ATOMIC);
1109         if (status) {
1110                 urb->status = status;
1111                 complete(urb->context);
1112         }
1113 }
1114
1115 static int unlink1(struct usbtest_dev *dev, int pipe, int size, int async)
1116 {
1117         struct urb              *urb;
1118         struct completion       completion;
1119         int                     retval = 0;
1120
1121         init_completion(&completion);
1122         urb = simple_alloc_urb(testdev_to_usbdev(dev), pipe, size);
1123         if (!urb)
1124                 return -ENOMEM;
1125         urb->context = &completion;
1126         urb->complete = unlink1_callback;
1127
1128         /* keep the endpoint busy.  there are lots of hc/hcd-internal
1129          * states, and testing should get to all of them over time.
1130          *
1131          * FIXME want additional tests for when endpoint is STALLing
1132          * due to errors, or is just NAKing requests.
1133          */
1134         retval = usb_submit_urb(urb, GFP_KERNEL);
1135         if (retval != 0) {
1136                 dev_err(&dev->intf->dev, "submit fail %d\n", retval);
1137                 return retval;
1138         }
1139
1140         /* unlinking that should always work.  variable delay tests more
1141          * hcd states and code paths, even with little other system load.
1142          */
1143         msleep(jiffies % (2 * INTERRUPT_RATE));
1144         if (async) {
1145                 while (!completion_done(&completion)) {
1146                         retval = usb_unlink_urb(urb);
1147
1148                         switch (retval) {
1149                         case -EBUSY:
1150                         case -EIDRM:
1151                                 /* we can't unlink urbs while they're completing
1152                                  * or if they've completed, and we haven't
1153                                  * resubmitted. "normal" drivers would prevent
1154                                  * resubmission, but since we're testing unlink
1155                                  * paths, we can't.
1156                                  */
1157                                 ERROR(dev, "unlink retry\n");
1158                                 continue;
1159                         case 0:
1160                         case -EINPROGRESS:
1161                                 break;
1162
1163                         default:
1164                                 dev_err(&dev->intf->dev,
1165                                         "unlink fail %d\n", retval);
1166                                 return retval;
1167                         }
1168
1169                         break;
1170                 }
1171         } else
1172                 usb_kill_urb(urb);
1173
1174         wait_for_completion(&completion);
1175         retval = urb->status;
1176         simple_free_urb(urb);
1177
1178         if (async)
1179                 return (retval == -ECONNRESET) ? 0 : retval - 1000;
1180         else
1181                 return (retval == -ENOENT || retval == -EPERM) ?
1182                                 0 : retval - 2000;
1183 }
1184
1185 static int unlink_simple(struct usbtest_dev *dev, int pipe, int len)
1186 {
1187         int                     retval = 0;
1188
1189         /* test sync and async paths */
1190         retval = unlink1(dev, pipe, len, 1);
1191         if (!retval)
1192                 retval = unlink1(dev, pipe, len, 0);
1193         return retval;
1194 }
1195
1196 /*-------------------------------------------------------------------------*/
1197
1198 struct queued_ctx {
1199         struct completion       complete;
1200         atomic_t                pending;
1201         unsigned                num;
1202         int                     status;
1203         struct urb              **urbs;
1204 };
1205
1206 static void unlink_queued_callback(struct urb *urb)
1207 {
1208         int                     status = urb->status;
1209         struct queued_ctx       *ctx = urb->context;
1210
1211         if (ctx->status)
1212                 goto done;
1213         if (urb == ctx->urbs[ctx->num - 4] || urb == ctx->urbs[ctx->num - 2]) {
1214                 if (status == -ECONNRESET)
1215                         goto done;
1216                 /* What error should we report if the URB completed normally? */
1217         }
1218         if (status != 0)
1219                 ctx->status = status;
1220
1221  done:
1222         if (atomic_dec_and_test(&ctx->pending))
1223                 complete(&ctx->complete);
1224 }
1225
1226 static int unlink_queued(struct usbtest_dev *dev, int pipe, unsigned num,
1227                 unsigned size)
1228 {
1229         struct queued_ctx       ctx;
1230         struct usb_device       *udev = testdev_to_usbdev(dev);
1231         void                    *buf;
1232         dma_addr_t              buf_dma;
1233         int                     i;
1234         int                     retval = -ENOMEM;
1235
1236         init_completion(&ctx.complete);
1237         atomic_set(&ctx.pending, 1);    /* One more than the actual value */
1238         ctx.num = num;
1239         ctx.status = 0;
1240
1241         buf = usb_alloc_coherent(udev, size, GFP_KERNEL, &buf_dma);
1242         if (!buf)
1243                 return retval;
1244         memset(buf, 0, size);
1245
1246         /* Allocate and init the urbs we'll queue */
1247         ctx.urbs = kcalloc(num, sizeof(struct urb *), GFP_KERNEL);
1248         if (!ctx.urbs)
1249                 goto free_buf;
1250         for (i = 0; i < num; i++) {
1251                 ctx.urbs[i] = usb_alloc_urb(0, GFP_KERNEL);
1252                 if (!ctx.urbs[i])
1253                         goto free_urbs;
1254                 usb_fill_bulk_urb(ctx.urbs[i], udev, pipe, buf, size,
1255                                 unlink_queued_callback, &ctx);
1256                 ctx.urbs[i]->transfer_dma = buf_dma;
1257                 ctx.urbs[i]->transfer_flags = URB_NO_TRANSFER_DMA_MAP;
1258         }
1259
1260         /* Submit all the URBs and then unlink URBs num - 4 and num - 2. */
1261         for (i = 0; i < num; i++) {
1262                 atomic_inc(&ctx.pending);
1263                 retval = usb_submit_urb(ctx.urbs[i], GFP_KERNEL);
1264                 if (retval != 0) {
1265                         dev_err(&dev->intf->dev, "submit urbs[%d] fail %d\n",
1266                                         i, retval);
1267                         atomic_dec(&ctx.pending);
1268                         ctx.status = retval;
1269                         break;
1270                 }
1271         }
1272         if (i == num) {
1273                 usb_unlink_urb(ctx.urbs[num - 4]);
1274                 usb_unlink_urb(ctx.urbs[num - 2]);
1275         } else {
1276                 while (--i >= 0)
1277                         usb_unlink_urb(ctx.urbs[i]);
1278         }
1279
1280         if (atomic_dec_and_test(&ctx.pending))          /* The extra count */
1281                 complete(&ctx.complete);
1282         wait_for_completion(&ctx.complete);
1283         retval = ctx.status;
1284
1285  free_urbs:
1286         for (i = 0; i < num; i++)
1287                 usb_free_urb(ctx.urbs[i]);
1288         kfree(ctx.urbs);
1289  free_buf:
1290         usb_free_coherent(udev, size, buf, buf_dma);
1291         return retval;
1292 }
1293
1294 /*-------------------------------------------------------------------------*/
1295
1296 static int verify_not_halted(struct usbtest_dev *tdev, int ep, struct urb *urb)
1297 {
1298         int     retval;
1299         u16     status;
1300
1301         /* shouldn't look or act halted */
1302         retval = usb_get_status(urb->dev, USB_RECIP_ENDPOINT, ep, &status);
1303         if (retval < 0) {
1304                 ERROR(tdev, "ep %02x couldn't get no-halt status, %d\n",
1305                                 ep, retval);
1306                 return retval;
1307         }
1308         if (status != 0) {
1309                 ERROR(tdev, "ep %02x bogus status: %04x != 0\n", ep, status);
1310                 return -EINVAL;
1311         }
1312         retval = simple_io(tdev, urb, 1, 0, 0, __func__);
1313         if (retval != 0)
1314                 return -EINVAL;
1315         return 0;
1316 }
1317
1318 static int verify_halted(struct usbtest_dev *tdev, int ep, struct urb *urb)
1319 {
1320         int     retval;
1321         u16     status;
1322
1323         /* should look and act halted */
1324         retval = usb_get_status(urb->dev, USB_RECIP_ENDPOINT, ep, &status);
1325         if (retval < 0) {
1326                 ERROR(tdev, "ep %02x couldn't get halt status, %d\n",
1327                                 ep, retval);
1328                 return retval;
1329         }
1330         le16_to_cpus(&status);
1331         if (status != 1) {
1332                 ERROR(tdev, "ep %02x bogus status: %04x != 1\n", ep, status);
1333                 return -EINVAL;
1334         }
1335         retval = simple_io(tdev, urb, 1, 0, -EPIPE, __func__);
1336         if (retval != -EPIPE)
1337                 return -EINVAL;
1338         retval = simple_io(tdev, urb, 1, 0, -EPIPE, "verify_still_halted");
1339         if (retval != -EPIPE)
1340                 return -EINVAL;
1341         return 0;
1342 }
1343
1344 static int test_halt(struct usbtest_dev *tdev, int ep, struct urb *urb)
1345 {
1346         int     retval;
1347
1348         /* shouldn't look or act halted now */
1349         retval = verify_not_halted(tdev, ep, urb);
1350         if (retval < 0)
1351                 return retval;
1352
1353         /* set halt (protocol test only), verify it worked */
1354         retval = usb_control_msg(urb->dev, usb_sndctrlpipe(urb->dev, 0),
1355                         USB_REQ_SET_FEATURE, USB_RECIP_ENDPOINT,
1356                         USB_ENDPOINT_HALT, ep,
1357                         NULL, 0, USB_CTRL_SET_TIMEOUT);
1358         if (retval < 0) {
1359                 ERROR(tdev, "ep %02x couldn't set halt, %d\n", ep, retval);
1360                 return retval;
1361         }
1362         retval = verify_halted(tdev, ep, urb);
1363         if (retval < 0)
1364                 return retval;
1365
1366         /* clear halt (tests API + protocol), verify it worked */
1367         retval = usb_clear_halt(urb->dev, urb->pipe);
1368         if (retval < 0) {
1369                 ERROR(tdev, "ep %02x couldn't clear halt, %d\n", ep, retval);
1370                 return retval;
1371         }
1372         retval = verify_not_halted(tdev, ep, urb);
1373         if (retval < 0)
1374                 return retval;
1375
1376         /* NOTE:  could also verify SET_INTERFACE clear halts ... */
1377
1378         return 0;
1379 }
1380
1381 static int halt_simple(struct usbtest_dev *dev)
1382 {
1383         int             ep;
1384         int             retval = 0;
1385         struct urb      *urb;
1386
1387         urb = simple_alloc_urb(testdev_to_usbdev(dev), 0, 512);
1388         if (urb == NULL)
1389                 return -ENOMEM;
1390
1391         if (dev->in_pipe) {
1392                 ep = usb_pipeendpoint(dev->in_pipe) | USB_DIR_IN;
1393                 urb->pipe = dev->in_pipe;
1394                 retval = test_halt(dev, ep, urb);
1395                 if (retval < 0)
1396                         goto done;
1397         }
1398
1399         if (dev->out_pipe) {
1400                 ep = usb_pipeendpoint(dev->out_pipe);
1401                 urb->pipe = dev->out_pipe;
1402                 retval = test_halt(dev, ep, urb);
1403         }
1404 done:
1405         simple_free_urb(urb);
1406         return retval;
1407 }
1408
1409 /*-------------------------------------------------------------------------*/
1410
1411 /* Control OUT tests use the vendor control requests from Intel's
1412  * USB 2.0 compliance test device:  write a buffer, read it back.
1413  *
1414  * Intel's spec only _requires_ that it work for one packet, which
1415  * is pretty weak.   Some HCDs place limits here; most devices will
1416  * need to be able to handle more than one OUT data packet.  We'll
1417  * try whatever we're told to try.
1418  */
1419 static int ctrl_out(struct usbtest_dev *dev,
1420                 unsigned count, unsigned length, unsigned vary, unsigned offset)
1421 {
1422         unsigned                i, j, len;
1423         int                     retval;
1424         u8                      *buf;
1425         char                    *what = "?";
1426         struct usb_device       *udev;
1427
1428         if (length < 1 || length > 0xffff || vary >= length)
1429                 return -EINVAL;
1430
1431         buf = kmalloc(length + offset, GFP_KERNEL);
1432         if (!buf)
1433                 return -ENOMEM;
1434
1435         buf += offset;
1436         udev = testdev_to_usbdev(dev);
1437         len = length;
1438         retval = 0;
1439
1440         /* NOTE:  hardware might well act differently if we pushed it
1441          * with lots back-to-back queued requests.
1442          */
1443         for (i = 0; i < count; i++) {
1444                 /* write patterned data */
1445                 for (j = 0; j < len; j++)
1446                         buf[j] = i + j;
1447                 retval = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
1448                                 0x5b, USB_DIR_OUT|USB_TYPE_VENDOR,
1449                                 0, 0, buf, len, USB_CTRL_SET_TIMEOUT);
1450                 if (retval != len) {
1451                         what = "write";
1452                         if (retval >= 0) {
1453                                 ERROR(dev, "ctrl_out, wlen %d (expected %d)\n",
1454                                                 retval, len);
1455                                 retval = -EBADMSG;
1456                         }
1457                         break;
1458                 }
1459
1460                 /* read it back -- assuming nothing intervened!!  */
1461                 retval = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
1462                                 0x5c, USB_DIR_IN|USB_TYPE_VENDOR,
1463                                 0, 0, buf, len, USB_CTRL_GET_TIMEOUT);
1464                 if (retval != len) {
1465                         what = "read";
1466                         if (retval >= 0) {
1467                                 ERROR(dev, "ctrl_out, rlen %d (expected %d)\n",
1468                                                 retval, len);
1469                                 retval = -EBADMSG;
1470                         }
1471                         break;
1472                 }
1473
1474                 /* fail if we can't verify */
1475                 for (j = 0; j < len; j++) {
1476                         if (buf[j] != (u8) (i + j)) {
1477                                 ERROR(dev, "ctrl_out, byte %d is %d not %d\n",
1478                                         j, buf[j], (u8) i + j);
1479                                 retval = -EBADMSG;
1480                                 break;
1481                         }
1482                 }
1483                 if (retval < 0) {
1484                         what = "verify";
1485                         break;
1486                 }
1487
1488                 len += vary;
1489
1490                 /* [real world] the "zero bytes IN" case isn't really used.
1491                  * hardware can easily trip up in this weird case, since its
1492                  * status stage is IN, not OUT like other ep0in transfers.
1493                  */
1494                 if (len > length)
1495                         len = realworld ? 1 : 0;
1496         }
1497
1498         if (retval < 0)
1499                 ERROR(dev, "ctrl_out %s failed, code %d, count %d\n",
1500                         what, retval, i);
1501
1502         kfree(buf - offset);
1503         return retval;
1504 }
1505
1506 /*-------------------------------------------------------------------------*/
1507
1508 /* ISO tests ... mimics common usage
1509  *  - buffer length is split into N packets (mostly maxpacket sized)
1510  *  - multi-buffers according to sglen
1511  */
1512
1513 struct iso_context {
1514         unsigned                count;
1515         unsigned                pending;
1516         spinlock_t              lock;
1517         struct completion       done;
1518         int                     submit_error;
1519         unsigned long           errors;
1520         unsigned long           packet_count;
1521         struct usbtest_dev      *dev;
1522 };
1523
1524 static void iso_callback(struct urb *urb)
1525 {
1526         struct iso_context      *ctx = urb->context;
1527
1528         spin_lock(&ctx->lock);
1529         ctx->count--;
1530
1531         ctx->packet_count += urb->number_of_packets;
1532         if (urb->error_count > 0)
1533                 ctx->errors += urb->error_count;
1534         else if (urb->status != 0)
1535                 ctx->errors += urb->number_of_packets;
1536         else if (urb->actual_length != urb->transfer_buffer_length)
1537                 ctx->errors++;
1538         else if (check_guard_bytes(ctx->dev, urb) != 0)
1539                 ctx->errors++;
1540
1541         if (urb->status == 0 && ctx->count > (ctx->pending - 1)
1542                         && !ctx->submit_error) {
1543                 int status = usb_submit_urb(urb, GFP_ATOMIC);
1544                 switch (status) {
1545                 case 0:
1546                         goto done;
1547                 default:
1548                         dev_err(&ctx->dev->intf->dev,
1549                                         "iso resubmit err %d\n",
1550                                         status);
1551                         /* FALLTHROUGH */
1552                 case -ENODEV:                   /* disconnected */
1553                 case -ESHUTDOWN:                /* endpoint disabled */
1554                         ctx->submit_error = 1;
1555                         break;
1556                 }
1557         }
1558
1559         ctx->pending--;
1560         if (ctx->pending == 0) {
1561                 if (ctx->errors)
1562                         dev_err(&ctx->dev->intf->dev,
1563                                 "iso test, %lu errors out of %lu\n",
1564                                 ctx->errors, ctx->packet_count);
1565                 complete(&ctx->done);
1566         }
1567 done:
1568         spin_unlock(&ctx->lock);
1569 }
1570
1571 static struct urb *iso_alloc_urb(
1572         struct usb_device       *udev,
1573         int                     pipe,
1574         struct usb_endpoint_descriptor  *desc,
1575         long                    bytes,
1576         unsigned offset
1577 )
1578 {
1579         struct urb              *urb;
1580         unsigned                i, maxp, packets;
1581
1582         if (bytes < 0 || !desc)
1583                 return NULL;
1584         maxp = 0x7ff & le16_to_cpu(desc->wMaxPacketSize);
1585         maxp *= 1 + (0x3 & (le16_to_cpu(desc->wMaxPacketSize) >> 11));
1586         packets = DIV_ROUND_UP(bytes, maxp);
1587
1588         urb = usb_alloc_urb(packets, GFP_KERNEL);
1589         if (!urb)
1590                 return urb;
1591         urb->dev = udev;
1592         urb->pipe = pipe;
1593
1594         urb->number_of_packets = packets;
1595         urb->transfer_buffer_length = bytes;
1596         urb->transfer_buffer = usb_alloc_coherent(udev, bytes + offset,
1597                                                         GFP_KERNEL,
1598                                                         &urb->transfer_dma);
1599         if (!urb->transfer_buffer) {
1600                 usb_free_urb(urb);
1601                 return NULL;
1602         }
1603         if (offset) {
1604                 memset(urb->transfer_buffer, GUARD_BYTE, offset);
1605                 urb->transfer_buffer += offset;
1606                 urb->transfer_dma += offset;
1607         }
1608         /* For inbound transfers use guard byte so that test fails if
1609                 data not correctly copied */
1610         memset(urb->transfer_buffer,
1611                         usb_pipein(urb->pipe) ? GUARD_BYTE : 0,
1612                         bytes);
1613
1614         for (i = 0; i < packets; i++) {
1615                 /* here, only the last packet will be short */
1616                 urb->iso_frame_desc[i].length = min((unsigned) bytes, maxp);
1617                 bytes -= urb->iso_frame_desc[i].length;
1618
1619                 urb->iso_frame_desc[i].offset = maxp * i;
1620         }
1621
1622         urb->complete = iso_callback;
1623         /* urb->context = SET BY CALLER */
1624         urb->interval = 1 << (desc->bInterval - 1);
1625         urb->transfer_flags = URB_ISO_ASAP | URB_NO_TRANSFER_DMA_MAP;
1626         return urb;
1627 }
1628
1629 static int
1630 test_iso_queue(struct usbtest_dev *dev, struct usbtest_param *param,
1631                 int pipe, struct usb_endpoint_descriptor *desc, unsigned offset)
1632 {
1633         struct iso_context      context;
1634         struct usb_device       *udev;
1635         unsigned                i;
1636         unsigned long           packets = 0;
1637         int                     status = 0;
1638         struct urb              *urbs[10];      /* FIXME no limit */
1639
1640         if (param->sglen > 10)
1641                 return -EDOM;
1642
1643         memset(&context, 0, sizeof context);
1644         context.count = param->iterations * param->sglen;
1645         context.dev = dev;
1646         init_completion(&context.done);
1647         spin_lock_init(&context.lock);
1648
1649         memset(urbs, 0, sizeof urbs);
1650         udev = testdev_to_usbdev(dev);
1651         dev_info(&dev->intf->dev,
1652                 "... iso period %d %sframes, wMaxPacket %04x\n",
1653                 1 << (desc->bInterval - 1),
1654                 (udev->speed == USB_SPEED_HIGH) ? "micro" : "",
1655                 le16_to_cpu(desc->wMaxPacketSize));
1656
1657         for (i = 0; i < param->sglen; i++) {
1658                 urbs[i] = iso_alloc_urb(udev, pipe, desc,
1659                                         param->length, offset);
1660                 if (!urbs[i]) {
1661                         status = -ENOMEM;
1662                         goto fail;
1663                 }
1664                 packets += urbs[i]->number_of_packets;
1665                 urbs[i]->context = &context;
1666         }
1667         packets *= param->iterations;
1668         dev_info(&dev->intf->dev,
1669                 "... total %lu msec (%lu packets)\n",
1670                 (packets * (1 << (desc->bInterval - 1)))
1671                         / ((udev->speed == USB_SPEED_HIGH) ? 8 : 1),
1672                 packets);
1673
1674         spin_lock_irq(&context.lock);
1675         for (i = 0; i < param->sglen; i++) {
1676                 ++context.pending;
1677                 status = usb_submit_urb(urbs[i], GFP_ATOMIC);
1678                 if (status < 0) {
1679                         ERROR(dev, "submit iso[%d], error %d\n", i, status);
1680                         if (i == 0) {
1681                                 spin_unlock_irq(&context.lock);
1682                                 goto fail;
1683                         }
1684
1685                         simple_free_urb(urbs[i]);
1686                         urbs[i] = NULL;
1687                         context.pending--;
1688                         context.submit_error = 1;
1689                         break;
1690                 }
1691         }
1692         spin_unlock_irq(&context.lock);
1693
1694         wait_for_completion(&context.done);
1695
1696         for (i = 0; i < param->sglen; i++) {
1697                 if (urbs[i])
1698                         simple_free_urb(urbs[i]);
1699         }
1700         /*
1701          * Isochronous transfers are expected to fail sometimes.  As an
1702          * arbitrary limit, we will report an error if any submissions
1703          * fail or if the transfer failure rate is > 10%.
1704          */
1705         if (status != 0)
1706                 ;
1707         else if (context.submit_error)
1708                 status = -EACCES;
1709         else if (context.errors > context.packet_count / 10)
1710                 status = -EIO;
1711         return status;
1712
1713 fail:
1714         for (i = 0; i < param->sglen; i++) {
1715                 if (urbs[i])
1716                         simple_free_urb(urbs[i]);
1717         }
1718         return status;
1719 }
1720
1721 static int test_unaligned_bulk(
1722         struct usbtest_dev *tdev,
1723         int pipe,
1724         unsigned length,
1725         int iterations,
1726         unsigned transfer_flags,
1727         const char *label)
1728 {
1729         int retval;
1730         struct urb *urb = usbtest_alloc_urb(
1731                 testdev_to_usbdev(tdev), pipe, length, transfer_flags, 1);
1732
1733         if (!urb)
1734                 return -ENOMEM;
1735
1736         retval = simple_io(tdev, urb, iterations, 0, 0, label);
1737         simple_free_urb(urb);
1738         return retval;
1739 }
1740
1741 /*-------------------------------------------------------------------------*/
1742
1743 /* We only have this one interface to user space, through usbfs.
1744  * User mode code can scan usbfs to find N different devices (maybe on
1745  * different busses) to use when testing, and allocate one thread per
1746  * test.  So discovery is simplified, and we have no device naming issues.
1747  *
1748  * Don't use these only as stress/load tests.  Use them along with with
1749  * other USB bus activity:  plugging, unplugging, mousing, mp3 playback,
1750  * video capture, and so on.  Run different tests at different times, in
1751  * different sequences.  Nothing here should interact with other devices,
1752  * except indirectly by consuming USB bandwidth and CPU resources for test
1753  * threads and request completion.  But the only way to know that for sure
1754  * is to test when HC queues are in use by many devices.
1755  *
1756  * WARNING:  Because usbfs grabs udev->dev.sem before calling this ioctl(),
1757  * it locks out usbcore in certain code paths.  Notably, if you disconnect
1758  * the device-under-test, khubd will wait block forever waiting for the
1759  * ioctl to complete ... so that usb_disconnect() can abort the pending
1760  * urbs and then call usbtest_disconnect().  To abort a test, you're best
1761  * off just killing the userspace task and waiting for it to exit.
1762  */
1763
1764 /* No BKL needed */
1765 static int
1766 usbtest_ioctl(struct usb_interface *intf, unsigned int code, void *buf)
1767 {
1768         struct usbtest_dev      *dev = usb_get_intfdata(intf);
1769         struct usb_device       *udev = testdev_to_usbdev(dev);
1770         struct usbtest_param    *param = buf;
1771         int                     retval = -EOPNOTSUPP;
1772         struct urb              *urb;
1773         struct scatterlist      *sg;
1774         struct usb_sg_request   req;
1775         struct timeval          start;
1776         unsigned                i;
1777
1778         /* FIXME USBDEVFS_CONNECTINFO doesn't say how fast the device is. */
1779
1780         pattern = mod_pattern;
1781
1782         if (code != USBTEST_REQUEST)
1783                 return -EOPNOTSUPP;
1784
1785         if (param->iterations <= 0)
1786                 return -EINVAL;
1787
1788         if (mutex_lock_interruptible(&dev->lock))
1789                 return -ERESTARTSYS;
1790
1791         /* FIXME: What if a system sleep starts while a test is running? */
1792
1793         /* some devices, like ez-usb default devices, need a non-default
1794          * altsetting to have any active endpoints.  some tests change
1795          * altsettings; force a default so most tests don't need to check.
1796          */
1797         if (dev->info->alt >= 0) {
1798                 int     res;
1799
1800                 if (intf->altsetting->desc.bInterfaceNumber) {
1801                         mutex_unlock(&dev->lock);
1802                         return -ENODEV;
1803                 }
1804                 res = set_altsetting(dev, dev->info->alt);
1805                 if (res) {
1806                         dev_err(&intf->dev,
1807                                         "set altsetting to %d failed, %d\n",
1808                                         dev->info->alt, res);
1809                         mutex_unlock(&dev->lock);
1810                         return res;
1811                 }
1812         }
1813
1814         /*
1815          * Just a bunch of test cases that every HCD is expected to handle.
1816          *
1817          * Some may need specific firmware, though it'd be good to have
1818          * one firmware image to handle all the test cases.
1819          *
1820          * FIXME add more tests!  cancel requests, verify the data, control
1821          * queueing, concurrent read+write threads, and so on.
1822          */
1823         do_gettimeofday(&start);
1824         switch (param->test_num) {
1825
1826         case 0:
1827                 dev_info(&intf->dev, "TEST 0:  NOP\n");
1828                 retval = 0;
1829                 break;
1830
1831         /* Simple non-queued bulk I/O tests */
1832         case 1:
1833                 if (dev->out_pipe == 0)
1834                         break;
1835                 dev_info(&intf->dev,
1836                                 "TEST 1:  write %d bytes %u times\n",
1837                                 param->length, param->iterations);
1838                 urb = simple_alloc_urb(udev, dev->out_pipe, param->length);
1839                 if (!urb) {
1840                         retval = -ENOMEM;
1841                         break;
1842                 }
1843                 /* FIRMWARE:  bulk sink (maybe accepts short writes) */
1844                 retval = simple_io(dev, urb, param->iterations, 0, 0, "test1");
1845                 simple_free_urb(urb);
1846                 break;
1847         case 2:
1848                 if (dev->in_pipe == 0)
1849                         break;
1850                 dev_info(&intf->dev,
1851                                 "TEST 2:  read %d bytes %u times\n",
1852                                 param->length, param->iterations);
1853                 urb = simple_alloc_urb(udev, dev->in_pipe, param->length);
1854                 if (!urb) {
1855                         retval = -ENOMEM;
1856                         break;
1857                 }
1858                 /* FIRMWARE:  bulk source (maybe generates short writes) */
1859                 retval = simple_io(dev, urb, param->iterations, 0, 0, "test2");
1860                 simple_free_urb(urb);
1861                 break;
1862         case 3:
1863                 if (dev->out_pipe == 0 || param->vary == 0)
1864                         break;
1865                 dev_info(&intf->dev,
1866                                 "TEST 3:  write/%d 0..%d bytes %u times\n",
1867                                 param->vary, param->length, param->iterations);
1868                 urb = simple_alloc_urb(udev, dev->out_pipe, param->length);
1869                 if (!urb) {
1870                         retval = -ENOMEM;
1871                         break;
1872                 }
1873                 /* FIRMWARE:  bulk sink (maybe accepts short writes) */
1874                 retval = simple_io(dev, urb, param->iterations, param->vary,
1875                                         0, "test3");
1876                 simple_free_urb(urb);
1877                 break;
1878         case 4:
1879                 if (dev->in_pipe == 0 || param->vary == 0)
1880                         break;
1881                 dev_info(&intf->dev,
1882                                 "TEST 4:  read/%d 0..%d bytes %u times\n",
1883                                 param->vary, param->length, param->iterations);
1884                 urb = simple_alloc_urb(udev, dev->in_pipe, param->length);
1885                 if (!urb) {
1886                         retval = -ENOMEM;
1887                         break;
1888                 }
1889                 /* FIRMWARE:  bulk source (maybe generates short writes) */
1890                 retval = simple_io(dev, urb, param->iterations, param->vary,
1891                                         0, "test4");
1892                 simple_free_urb(urb);
1893                 break;
1894
1895         /* Queued bulk I/O tests */
1896         case 5:
1897                 if (dev->out_pipe == 0 || param->sglen == 0)
1898                         break;
1899                 dev_info(&intf->dev,
1900                         "TEST 5:  write %d sglists %d entries of %d bytes\n",
1901                                 param->iterations,
1902                                 param->sglen, param->length);
1903                 sg = alloc_sglist(param->sglen, param->length, 0);
1904                 if (!sg) {
1905                         retval = -ENOMEM;
1906                         break;
1907                 }
1908                 /* FIRMWARE:  bulk sink (maybe accepts short writes) */
1909                 retval = perform_sglist(dev, param->iterations, dev->out_pipe,
1910                                 &req, sg, param->sglen);
1911                 free_sglist(sg, param->sglen);
1912                 break;
1913
1914         case 6:
1915                 if (dev->in_pipe == 0 || param->sglen == 0)
1916                         break;
1917                 dev_info(&intf->dev,
1918                         "TEST 6:  read %d sglists %d entries of %d bytes\n",
1919                                 param->iterations,
1920                                 param->sglen, param->length);
1921                 sg = alloc_sglist(param->sglen, param->length, 0);
1922                 if (!sg) {
1923                         retval = -ENOMEM;
1924                         break;
1925                 }
1926                 /* FIRMWARE:  bulk source (maybe generates short writes) */
1927                 retval = perform_sglist(dev, param->iterations, dev->in_pipe,
1928                                 &req, sg, param->sglen);
1929                 free_sglist(sg, param->sglen);
1930                 break;
1931         case 7:
1932                 if (dev->out_pipe == 0 || param->sglen == 0 || param->vary == 0)
1933                         break;
1934                 dev_info(&intf->dev,
1935                         "TEST 7:  write/%d %d sglists %d entries 0..%d bytes\n",
1936                                 param->vary, param->iterations,
1937                                 param->sglen, param->length);
1938                 sg = alloc_sglist(param->sglen, param->length, param->vary);
1939                 if (!sg) {
1940                         retval = -ENOMEM;
1941                         break;
1942                 }
1943                 /* FIRMWARE:  bulk sink (maybe accepts short writes) */
1944                 retval = perform_sglist(dev, param->iterations, dev->out_pipe,
1945                                 &req, sg, param->sglen);
1946                 free_sglist(sg, param->sglen);
1947                 break;
1948         case 8:
1949                 if (dev->in_pipe == 0 || param->sglen == 0 || param->vary == 0)
1950                         break;
1951                 dev_info(&intf->dev,
1952                         "TEST 8:  read/%d %d sglists %d entries 0..%d bytes\n",
1953                                 param->vary, param->iterations,
1954                                 param->sglen, param->length);
1955                 sg = alloc_sglist(param->sglen, param->length, param->vary);
1956                 if (!sg) {
1957                         retval = -ENOMEM;
1958                         break;
1959                 }
1960                 /* FIRMWARE:  bulk source (maybe generates short writes) */
1961                 retval = perform_sglist(dev, param->iterations, dev->in_pipe,
1962                                 &req, sg, param->sglen);
1963                 free_sglist(sg, param->sglen);
1964                 break;
1965
1966         /* non-queued sanity tests for control (chapter 9 subset) */
1967         case 9:
1968                 retval = 0;
1969                 dev_info(&intf->dev,
1970                         "TEST 9:  ch9 (subset) control tests, %d times\n",
1971                                 param->iterations);
1972                 for (i = param->iterations; retval == 0 && i--; /* NOP */)
1973                         retval = ch9_postconfig(dev);
1974                 if (retval)
1975                         dev_err(&intf->dev, "ch9 subset failed, "
1976                                         "iterations left %d\n", i);
1977                 break;
1978
1979         /* queued control messaging */
1980         case 10:
1981                 if (param->sglen == 0)
1982                         break;
1983                 retval = 0;
1984                 dev_info(&intf->dev,
1985                                 "TEST 10:  queue %d control calls, %d times\n",
1986                                 param->sglen,
1987                                 param->iterations);
1988                 retval = test_ctrl_queue(dev, param);
1989                 break;
1990
1991         /* simple non-queued unlinks (ring with one urb) */
1992         case 11:
1993                 if (dev->in_pipe == 0 || !param->length)
1994                         break;
1995                 retval = 0;
1996                 dev_info(&intf->dev, "TEST 11:  unlink %d reads of %d\n",
1997                                 param->iterations, param->length);
1998                 for (i = param->iterations; retval == 0 && i--; /* NOP */)
1999                         retval = unlink_simple(dev, dev->in_pipe,
2000                                                 param->length);
2001                 if (retval)
2002                         dev_err(&intf->dev, "unlink reads failed %d, "
2003                                 "iterations left %d\n", retval, i);
2004                 break;
2005         case 12:
2006                 if (dev->out_pipe == 0 || !param->length)
2007                         break;
2008                 retval = 0;
2009                 dev_info(&intf->dev, "TEST 12:  unlink %d writes of %d\n",
2010                                 param->iterations, param->length);
2011                 for (i = param->iterations; retval == 0 && i--; /* NOP */)
2012                         retval = unlink_simple(dev, dev->out_pipe,
2013                                                 param->length);
2014                 if (retval)
2015                         dev_err(&intf->dev, "unlink writes failed %d, "
2016                                 "iterations left %d\n", retval, i);
2017                 break;
2018
2019         /* ep halt tests */
2020         case 13:
2021                 if (dev->out_pipe == 0 && dev->in_pipe == 0)
2022                         break;
2023                 retval = 0;
2024                 dev_info(&intf->dev, "TEST 13:  set/clear %d halts\n",
2025                                 param->iterations);
2026                 for (i = param->iterations; retval == 0 && i--; /* NOP */)
2027                         retval = halt_simple(dev);
2028
2029                 if (retval)
2030                         ERROR(dev, "halts failed, iterations left %d\n", i);
2031                 break;
2032
2033         /* control write tests */
2034         case 14:
2035                 if (!dev->info->ctrl_out)
2036                         break;
2037                 dev_info(&intf->dev, "TEST 14:  %d ep0out, %d..%d vary %d\n",
2038                                 param->iterations,
2039                                 realworld ? 1 : 0, param->length,
2040                                 param->vary);
2041                 retval = ctrl_out(dev, param->iterations,
2042                                 param->length, param->vary, 0);
2043                 break;
2044
2045         /* iso write tests */
2046         case 15:
2047                 if (dev->out_iso_pipe == 0 || param->sglen == 0)
2048                         break;
2049                 dev_info(&intf->dev,
2050                         "TEST 15:  write %d iso, %d entries of %d bytes\n",
2051                                 param->iterations,
2052                                 param->sglen, param->length);
2053                 /* FIRMWARE:  iso sink */
2054                 retval = test_iso_queue(dev, param,
2055                                 dev->out_iso_pipe, dev->iso_out, 0);
2056                 break;
2057
2058         /* iso read tests */
2059         case 16:
2060                 if (dev->in_iso_pipe == 0 || param->sglen == 0)
2061                         break;
2062                 dev_info(&intf->dev,
2063                         "TEST 16:  read %d iso, %d entries of %d bytes\n",
2064                                 param->iterations,
2065                                 param->sglen, param->length);
2066                 /* FIRMWARE:  iso source */
2067                 retval = test_iso_queue(dev, param,
2068                                 dev->in_iso_pipe, dev->iso_in, 0);
2069                 break;
2070
2071         /* FIXME scatterlist cancel (needs helper thread) */
2072
2073         /* Tests for bulk I/O using DMA mapping by core and odd address */
2074         case 17:
2075                 if (dev->out_pipe == 0)
2076                         break;
2077                 dev_info(&intf->dev,
2078                         "TEST 17:  write odd addr %d bytes %u times core map\n",
2079                         param->length, param->iterations);
2080
2081                 retval = test_unaligned_bulk(
2082                                 dev, dev->out_pipe,
2083                                 param->length, param->iterations,
2084                                 0, "test17");
2085                 break;
2086
2087         case 18:
2088                 if (dev->in_pipe == 0)
2089                         break;
2090                 dev_info(&intf->dev,
2091                         "TEST 18:  read odd addr %d bytes %u times core map\n",
2092                         param->length, param->iterations);
2093
2094                 retval = test_unaligned_bulk(
2095                                 dev, dev->in_pipe,
2096                                 param->length, param->iterations,
2097                                 0, "test18");
2098                 break;
2099
2100         /* Tests for bulk I/O using premapped coherent buffer and odd address */
2101         case 19:
2102                 if (dev->out_pipe == 0)
2103                         break;
2104                 dev_info(&intf->dev,
2105                         "TEST 19:  write odd addr %d bytes %u times premapped\n",
2106                         param->length, param->iterations);
2107
2108                 retval = test_unaligned_bulk(
2109                                 dev, dev->out_pipe,
2110                                 param->length, param->iterations,
2111                                 URB_NO_TRANSFER_DMA_MAP, "test19");
2112                 break;
2113
2114         case 20:
2115                 if (dev->in_pipe == 0)
2116                         break;
2117                 dev_info(&intf->dev,
2118                         "TEST 20:  read odd addr %d bytes %u times premapped\n",
2119                         param->length, param->iterations);
2120
2121                 retval = test_unaligned_bulk(
2122                                 dev, dev->in_pipe,
2123                                 param->length, param->iterations,
2124                                 URB_NO_TRANSFER_DMA_MAP, "test20");
2125                 break;
2126
2127         /* control write tests with unaligned buffer */
2128         case 21:
2129                 if (!dev->info->ctrl_out)
2130                         break;
2131                 dev_info(&intf->dev,
2132                                 "TEST 21:  %d ep0out odd addr, %d..%d vary %d\n",
2133                                 param->iterations,
2134                                 realworld ? 1 : 0, param->length,
2135                                 param->vary);
2136                 retval = ctrl_out(dev, param->iterations,
2137                                 param->length, param->vary, 1);
2138                 break;
2139
2140         /* unaligned iso tests */
2141         case 22:
2142                 if (dev->out_iso_pipe == 0 || param->sglen == 0)
2143                         break;
2144                 dev_info(&intf->dev,
2145                         "TEST 22:  write %d iso odd, %d entries of %d bytes\n",
2146                                 param->iterations,
2147                                 param->sglen, param->length);
2148                 retval = test_iso_queue(dev, param,
2149                                 dev->out_iso_pipe, dev->iso_out, 1);
2150                 break;
2151
2152         case 23:
2153                 if (dev->in_iso_pipe == 0 || param->sglen == 0)
2154                         break;
2155                 dev_info(&intf->dev,
2156                         "TEST 23:  read %d iso odd, %d entries of %d bytes\n",
2157                                 param->iterations,
2158                                 param->sglen, param->length);
2159                 retval = test_iso_queue(dev, param,
2160                                 dev->in_iso_pipe, dev->iso_in, 1);
2161                 break;
2162
2163         /* unlink URBs from a bulk-OUT queue */
2164         case 24:
2165                 if (dev->out_pipe == 0 || !param->length || param->sglen < 4)
2166                         break;
2167                 retval = 0;
2168                 dev_info(&intf->dev, "TEST 17:  unlink from %d queues of "
2169                                 "%d %d-byte writes\n",
2170                                 param->iterations, param->sglen, param->length);
2171                 for (i = param->iterations; retval == 0 && i > 0; --i) {
2172                         retval = unlink_queued(dev, dev->out_pipe,
2173                                                 param->sglen, param->length);
2174                         if (retval) {
2175                                 dev_err(&intf->dev,
2176                                         "unlink queued writes failed %d, "
2177                                         "iterations left %d\n", retval, i);
2178                                 break;
2179                         }
2180                 }
2181                 break;
2182
2183         }
2184         do_gettimeofday(&param->duration);
2185         param->duration.tv_sec -= start.tv_sec;
2186         param->duration.tv_usec -= start.tv_usec;
2187         if (param->duration.tv_usec < 0) {
2188                 param->duration.tv_usec += 1000 * 1000;
2189                 param->duration.tv_sec -= 1;
2190         }
2191         mutex_unlock(&dev->lock);
2192         return retval;
2193 }
2194
2195 /*-------------------------------------------------------------------------*/
2196
2197 static unsigned force_interrupt;
2198 module_param(force_interrupt, uint, 0);
2199 MODULE_PARM_DESC(force_interrupt, "0 = test default; else interrupt");
2200
2201 #ifdef  GENERIC
2202 static unsigned short vendor;
2203 module_param(vendor, ushort, 0);
2204 MODULE_PARM_DESC(vendor, "vendor code (from usb-if)");
2205
2206 static unsigned short product;
2207 module_param(product, ushort, 0);
2208 MODULE_PARM_DESC(product, "product code (from vendor)");
2209 #endif
2210
2211 static int
2212 usbtest_probe(struct usb_interface *intf, const struct usb_device_id *id)
2213 {
2214         struct usb_device       *udev;
2215         struct usbtest_dev      *dev;
2216         struct usbtest_info     *info;
2217         char                    *rtest, *wtest;
2218         char                    *irtest, *iwtest;
2219
2220         udev = interface_to_usbdev(intf);
2221
2222 #ifdef  GENERIC
2223         /* specify devices by module parameters? */
2224         if (id->match_flags == 0) {
2225                 /* vendor match required, product match optional */
2226                 if (!vendor || le16_to_cpu(udev->descriptor.idVendor) != (u16)vendor)
2227                         return -ENODEV;
2228                 if (product && le16_to_cpu(udev->descriptor.idProduct) != (u16)product)
2229                         return -ENODEV;
2230                 dev_info(&intf->dev, "matched module params, "
2231                                         "vend=0x%04x prod=0x%04x\n",
2232                                 le16_to_cpu(udev->descriptor.idVendor),
2233                                 le16_to_cpu(udev->descriptor.idProduct));
2234         }
2235 #endif
2236
2237         dev = kzalloc(sizeof(*dev), GFP_KERNEL);
2238         if (!dev)
2239                 return -ENOMEM;
2240         info = (struct usbtest_info *) id->driver_info;
2241         dev->info = info;
2242         mutex_init(&dev->lock);
2243
2244         dev->intf = intf;
2245
2246         /* cacheline-aligned scratch for i/o */
2247         dev->buf = kmalloc(TBUF_SIZE, GFP_KERNEL);
2248         if (dev->buf == NULL) {
2249                 kfree(dev);
2250                 return -ENOMEM;
2251         }
2252
2253         /* NOTE this doesn't yet test the handful of difference that are
2254          * visible with high speed interrupts:  bigger maxpacket (1K) and
2255          * "high bandwidth" modes (up to 3 packets/uframe).
2256          */
2257         rtest = wtest = "";
2258         irtest = iwtest = "";
2259         if (force_interrupt || udev->speed == USB_SPEED_LOW) {
2260                 if (info->ep_in) {
2261                         dev->in_pipe = usb_rcvintpipe(udev, info->ep_in);
2262                         rtest = " intr-in";
2263                 }
2264                 if (info->ep_out) {
2265                         dev->out_pipe = usb_sndintpipe(udev, info->ep_out);
2266                         wtest = " intr-out";
2267                 }
2268         } else {
2269                 if (info->autoconf) {
2270                         int status;
2271
2272                         status = get_endpoints(dev, intf);
2273                         if (status < 0) {
2274                                 WARNING(dev, "couldn't get endpoints, %d\n",
2275                                                 status);
2276                                 return status;
2277                         }
2278                         /* may find bulk or ISO pipes */
2279                 } else {
2280                         if (info->ep_in)
2281                                 dev->in_pipe = usb_rcvbulkpipe(udev,
2282                                                         info->ep_in);
2283                         if (info->ep_out)
2284                                 dev->out_pipe = usb_sndbulkpipe(udev,
2285                                                         info->ep_out);
2286                 }
2287                 if (dev->in_pipe)
2288                         rtest = " bulk-in";
2289                 if (dev->out_pipe)
2290                         wtest = " bulk-out";
2291                 if (dev->in_iso_pipe)
2292                         irtest = " iso-in";
2293                 if (dev->out_iso_pipe)
2294                         iwtest = " iso-out";
2295         }
2296
2297         usb_set_intfdata(intf, dev);
2298         dev_info(&intf->dev, "%s\n", info->name);
2299         dev_info(&intf->dev, "%s speed {control%s%s%s%s%s} tests%s\n",
2300                         ({ char *tmp;
2301                         switch (udev->speed) {
2302                         case USB_SPEED_LOW:
2303                                 tmp = "low";
2304                                 break;
2305                         case USB_SPEED_FULL:
2306                                 tmp = "full";
2307                                 break;
2308                         case USB_SPEED_HIGH:
2309                                 tmp = "high";
2310                                 break;
2311                         default:
2312                                 tmp = "unknown";
2313                                 break;
2314                         }; tmp; }),
2315                         info->ctrl_out ? " in/out" : "",
2316                         rtest, wtest,
2317                         irtest, iwtest,
2318                         info->alt >= 0 ? " (+alt)" : "");
2319         return 0;
2320 }
2321
2322 static int usbtest_suspend(struct usb_interface *intf, pm_message_t message)
2323 {
2324         return 0;
2325 }
2326
2327 static int usbtest_resume(struct usb_interface *intf)
2328 {
2329         return 0;
2330 }
2331
2332
2333 static void usbtest_disconnect(struct usb_interface *intf)
2334 {
2335         struct usbtest_dev      *dev = usb_get_intfdata(intf);
2336
2337         usb_set_intfdata(intf, NULL);
2338         dev_dbg(&intf->dev, "disconnect\n");
2339         kfree(dev);
2340 }
2341
2342 /* Basic testing only needs a device that can source or sink bulk traffic.
2343  * Any device can test control transfers (default with GENERIC binding).
2344  *
2345  * Several entries work with the default EP0 implementation that's built
2346  * into EZ-USB chips.  There's a default vendor ID which can be overridden
2347  * by (very) small config EEPROMS, but otherwise all these devices act
2348  * identically until firmware is loaded:  only EP0 works.  It turns out
2349  * to be easy to make other endpoints work, without modifying that EP0
2350  * behavior.  For now, we expect that kind of firmware.
2351  */
2352
2353 /* an21xx or fx versions of ez-usb */
2354 static struct usbtest_info ez1_info = {
2355         .name           = "EZ-USB device",
2356         .ep_in          = 2,
2357         .ep_out         = 2,
2358         .alt            = 1,
2359 };
2360
2361 /* fx2 version of ez-usb */
2362 static struct usbtest_info ez2_info = {
2363         .name           = "FX2 device",
2364         .ep_in          = 6,
2365         .ep_out         = 2,
2366         .alt            = 1,
2367 };
2368
2369 /* ezusb family device with dedicated usb test firmware,
2370  */
2371 static struct usbtest_info fw_info = {
2372         .name           = "usb test device",
2373         .ep_in          = 2,
2374         .ep_out         = 2,
2375         .alt            = 1,
2376         .autoconf       = 1,            /* iso and ctrl_out need autoconf */
2377         .ctrl_out       = 1,
2378         .iso            = 1,            /* iso_ep's are #8 in/out */
2379 };
2380
2381 /* peripheral running Linux and 'zero.c' test firmware, or
2382  * its user-mode cousin. different versions of this use
2383  * different hardware with the same vendor/product codes.
2384  * host side MUST rely on the endpoint descriptors.
2385  */
2386 static struct usbtest_info gz_info = {
2387         .name           = "Linux gadget zero",
2388         .autoconf       = 1,
2389         .ctrl_out       = 1,
2390         .alt            = 0,
2391 };
2392
2393 static struct usbtest_info um_info = {
2394         .name           = "Linux user mode test driver",
2395         .autoconf       = 1,
2396         .alt            = -1,
2397 };
2398
2399 static struct usbtest_info um2_info = {
2400         .name           = "Linux user mode ISO test driver",
2401         .autoconf       = 1,
2402         .iso            = 1,
2403         .alt            = -1,
2404 };
2405
2406 #ifdef IBOT2
2407 /* this is a nice source of high speed bulk data;
2408  * uses an FX2, with firmware provided in the device
2409  */
2410 static struct usbtest_info ibot2_info = {
2411         .name           = "iBOT2 webcam",
2412         .ep_in          = 2,
2413         .alt            = -1,
2414 };
2415 #endif
2416
2417 #ifdef GENERIC
2418 /* we can use any device to test control traffic */
2419 static struct usbtest_info generic_info = {
2420         .name           = "Generic USB device",
2421         .alt            = -1,
2422 };
2423 #endif
2424
2425
2426 static const struct usb_device_id id_table[] = {
2427
2428         /*-------------------------------------------------------------*/
2429
2430         /* EZ-USB devices which download firmware to replace (or in our
2431          * case augment) the default device implementation.
2432          */
2433
2434         /* generic EZ-USB FX controller */
2435         { USB_DEVICE(0x0547, 0x2235),
2436                 .driver_info = (unsigned long) &ez1_info,
2437         },
2438
2439         /* CY3671 development board with EZ-USB FX */
2440         { USB_DEVICE(0x0547, 0x0080),
2441                 .driver_info = (unsigned long) &ez1_info,
2442         },
2443
2444         /* generic EZ-USB FX2 controller (or development board) */
2445         { USB_DEVICE(0x04b4, 0x8613),
2446                 .driver_info = (unsigned long) &ez2_info,
2447         },
2448
2449         /* re-enumerated usb test device firmware */
2450         { USB_DEVICE(0xfff0, 0xfff0),
2451                 .driver_info = (unsigned long) &fw_info,
2452         },
2453
2454         /* "Gadget Zero" firmware runs under Linux */
2455         { USB_DEVICE(0x0525, 0xa4a0),
2456                 .driver_info = (unsigned long) &gz_info,
2457         },
2458
2459         /* so does a user-mode variant */
2460         { USB_DEVICE(0x0525, 0xa4a4),
2461                 .driver_info = (unsigned long) &um_info,
2462         },
2463
2464         /* ... and a user-mode variant that talks iso */
2465         { USB_DEVICE(0x0525, 0xa4a3),
2466                 .driver_info = (unsigned long) &um2_info,
2467         },
2468
2469 #ifdef KEYSPAN_19Qi
2470         /* Keyspan 19qi uses an21xx (original EZ-USB) */
2471         /* this does not coexist with the real Keyspan 19qi driver! */
2472         { USB_DEVICE(0x06cd, 0x010b),
2473                 .driver_info = (unsigned long) &ez1_info,
2474         },
2475 #endif
2476
2477         /*-------------------------------------------------------------*/
2478
2479 #ifdef IBOT2
2480         /* iBOT2 makes a nice source of high speed bulk-in data */
2481         /* this does not coexist with a real iBOT2 driver! */
2482         { USB_DEVICE(0x0b62, 0x0059),
2483                 .driver_info = (unsigned long) &ibot2_info,
2484         },
2485 #endif
2486
2487         /*-------------------------------------------------------------*/
2488
2489 #ifdef GENERIC
2490         /* module params can specify devices to use for control tests */
2491         { .driver_info = (unsigned long) &generic_info, },
2492 #endif
2493
2494         /*-------------------------------------------------------------*/
2495
2496         { }
2497 };
2498 MODULE_DEVICE_TABLE(usb, id_table);
2499
2500 static struct usb_driver usbtest_driver = {
2501         .name =         "usbtest",
2502         .id_table =     id_table,
2503         .probe =        usbtest_probe,
2504         .unlocked_ioctl = usbtest_ioctl,
2505         .disconnect =   usbtest_disconnect,
2506         .suspend =      usbtest_suspend,
2507         .resume =       usbtest_resume,
2508 };
2509
2510 /*-------------------------------------------------------------------------*/
2511
2512 static int __init usbtest_init(void)
2513 {
2514 #ifdef GENERIC
2515         if (vendor)
2516                 pr_debug("params: vend=0x%04x prod=0x%04x\n", vendor, product);
2517 #endif
2518         return usb_register(&usbtest_driver);
2519 }
2520 module_init(usbtest_init);
2521
2522 static void __exit usbtest_exit(void)
2523 {
2524         usb_deregister(&usbtest_driver);
2525 }
2526 module_exit(usbtest_exit);
2527
2528 MODULE_DESCRIPTION("USB Core/HCD Testing Driver");
2529 MODULE_LICENSE("GPL");
2530