Version:  2.0.40 2.2.26 2.4.37 3.11 3.12 3.13 3.14 3.15 3.16 3.17 3.18 3.19 4.0 4.1 4.2 4.3 4.4 4.5 4.6 4.7 4.8

Linux/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 #include <linux/timer.h>
 11 #include <linux/usb.h>
 12 
 13 #define SIMPLE_IO_TIMEOUT       10000   /* in milliseconds */
 14 
 15 /*-------------------------------------------------------------------------*/
 16 
 17 static int override_alt = -1;
 18 module_param_named(alt, override_alt, int, 0644);
 19 MODULE_PARM_DESC(alt, ">= 0 to override altsetting selection");
 20 static void complicated_callback(struct urb *urb);
 21 
 22 /*-------------------------------------------------------------------------*/
 23 
 24 /* FIXME make these public somewhere; usbdevfs.h? */
 25 
 26 /* Parameter for usbtest driver. */
 27 struct usbtest_param_32 {
 28         /* inputs */
 29         __u32           test_num;       /* 0..(TEST_CASES-1) */
 30         __u32           iterations;
 31         __u32           length;
 32         __u32           vary;
 33         __u32           sglen;
 34 
 35         /* outputs */
 36         __s32           duration_sec;
 37         __s32           duration_usec;
 38 };
 39 
 40 /*
 41  * Compat parameter to the usbtest driver.
 42  * This supports older user space binaries compiled with 64 bit compiler.
 43  */
 44 struct usbtest_param_64 {
 45         /* inputs */
 46         __u32           test_num;       /* 0..(TEST_CASES-1) */
 47         __u32           iterations;
 48         __u32           length;
 49         __u32           vary;
 50         __u32           sglen;
 51 
 52         /* outputs */
 53         __s64           duration_sec;
 54         __s64           duration_usec;
 55 };
 56 
 57 /* IOCTL interface to the driver. */
 58 #define USBTEST_REQUEST_32    _IOWR('U', 100, struct usbtest_param_32)
 59 /* COMPAT IOCTL interface to the driver. */
 60 #define USBTEST_REQUEST_64    _IOWR('U', 100, struct usbtest_param_64)
 61 
 62 /*-------------------------------------------------------------------------*/
 63 
 64 #define GENERIC         /* let probe() bind using module params */
 65 
 66 /* Some devices that can be used for testing will have "real" drivers.
 67  * Entries for those need to be enabled here by hand, after disabling
 68  * that "real" driver.
 69  */
 70 //#define       IBOT2           /* grab iBOT2 webcams */
 71 //#define       KEYSPAN_19Qi    /* grab un-renumerated serial adapter */
 72 
 73 /*-------------------------------------------------------------------------*/
 74 
 75 struct usbtest_info {
 76         const char              *name;
 77         u8                      ep_in;          /* bulk/intr source */
 78         u8                      ep_out;         /* bulk/intr sink */
 79         unsigned                autoconf:1;
 80         unsigned                ctrl_out:1;
 81         unsigned                iso:1;          /* try iso in/out */
 82         unsigned                intr:1;         /* try interrupt in/out */
 83         int                     alt;
 84 };
 85 
 86 /* this is accessed only through usbfs ioctl calls.
 87  * one ioctl to issue a test ... one lock per device.
 88  * tests create other threads if they need them.
 89  * urbs and buffers are allocated dynamically,
 90  * and data generated deterministically.
 91  */
 92 struct usbtest_dev {
 93         struct usb_interface    *intf;
 94         struct usbtest_info     *info;
 95         int                     in_pipe;
 96         int                     out_pipe;
 97         int                     in_iso_pipe;
 98         int                     out_iso_pipe;
 99         int                     in_int_pipe;
100         int                     out_int_pipe;
101         struct usb_endpoint_descriptor  *iso_in, *iso_out;
102         struct usb_endpoint_descriptor  *int_in, *int_out;
103         struct mutex            lock;
104 
105 #define TBUF_SIZE       256
106         u8                      *buf;
107 };
108 
109 static struct usb_device *testdev_to_usbdev(struct usbtest_dev *test)
110 {
111         return interface_to_usbdev(test->intf);
112 }
113 
114 /* set up all urbs so they can be used with either bulk or interrupt */
115 #define INTERRUPT_RATE          1       /* msec/transfer */
116 
117 #define ERROR(tdev, fmt, args...) \
118         dev_err(&(tdev)->intf->dev , fmt , ## args)
119 #define WARNING(tdev, fmt, args...) \
120         dev_warn(&(tdev)->intf->dev , fmt , ## args)
121 
122 #define GUARD_BYTE      0xA5
123 #define MAX_SGLEN       128
124 
125 /*-------------------------------------------------------------------------*/
126 
127 static int
128 get_endpoints(struct usbtest_dev *dev, struct usb_interface *intf)
129 {
130         int                             tmp;
131         struct usb_host_interface       *alt;
132         struct usb_host_endpoint        *in, *out;
133         struct usb_host_endpoint        *iso_in, *iso_out;
134         struct usb_host_endpoint        *int_in, *int_out;
135         struct usb_device               *udev;
136 
137         for (tmp = 0; tmp < intf->num_altsetting; tmp++) {
138                 unsigned        ep;
139 
140                 in = out = NULL;
141                 iso_in = iso_out = NULL;
142                 int_in = int_out = NULL;
143                 alt = intf->altsetting + tmp;
144 
145                 if (override_alt >= 0 &&
146                                 override_alt != alt->desc.bAlternateSetting)
147                         continue;
148 
149                 /* take the first altsetting with in-bulk + out-bulk;
150                  * ignore other endpoints and altsettings.
151                  */
152                 for (ep = 0; ep < alt->desc.bNumEndpoints; ep++) {
153                         struct usb_host_endpoint        *e;
154 
155                         e = alt->endpoint + ep;
156                         switch (usb_endpoint_type(&e->desc)) {
157                         case USB_ENDPOINT_XFER_BULK:
158                                 break;
159                         case USB_ENDPOINT_XFER_INT:
160                                 if (dev->info->intr)
161                                         goto try_intr;
162                         case USB_ENDPOINT_XFER_ISOC:
163                                 if (dev->info->iso)
164                                         goto try_iso;
165                                 /* FALLTHROUGH */
166                         default:
167                                 continue;
168                         }
169                         if (usb_endpoint_dir_in(&e->desc)) {
170                                 if (!in)
171                                         in = e;
172                         } else {
173                                 if (!out)
174                                         out = e;
175                         }
176                         continue;
177 try_intr:
178                         if (usb_endpoint_dir_in(&e->desc)) {
179                                 if (!int_in)
180                                         int_in = e;
181                         } else {
182                                 if (!int_out)
183                                         int_out = e;
184                         }
185                         continue;
186 try_iso:
187                         if (usb_endpoint_dir_in(&e->desc)) {
188                                 if (!iso_in)
189                                         iso_in = e;
190                         } else {
191                                 if (!iso_out)
192                                         iso_out = e;
193                         }
194                 }
195                 if ((in && out)  ||  iso_in || iso_out || int_in || int_out)
196                         goto found;
197         }
198         return -EINVAL;
199 
200 found:
201         udev = testdev_to_usbdev(dev);
202         dev->info->alt = alt->desc.bAlternateSetting;
203         if (alt->desc.bAlternateSetting != 0) {
204                 tmp = usb_set_interface(udev,
205                                 alt->desc.bInterfaceNumber,
206                                 alt->desc.bAlternateSetting);
207                 if (tmp < 0)
208                         return tmp;
209         }
210 
211         if (in) {
212                 dev->in_pipe = usb_rcvbulkpipe(udev,
213                         in->desc.bEndpointAddress & USB_ENDPOINT_NUMBER_MASK);
214                 dev->out_pipe = usb_sndbulkpipe(udev,
215                         out->desc.bEndpointAddress & USB_ENDPOINT_NUMBER_MASK);
216         }
217         if (iso_in) {
218                 dev->iso_in = &iso_in->desc;
219                 dev->in_iso_pipe = usb_rcvisocpipe(udev,
220                                 iso_in->desc.bEndpointAddress
221                                         & USB_ENDPOINT_NUMBER_MASK);
222         }
223 
224         if (iso_out) {
225                 dev->iso_out = &iso_out->desc;
226                 dev->out_iso_pipe = usb_sndisocpipe(udev,
227                                 iso_out->desc.bEndpointAddress
228                                         & USB_ENDPOINT_NUMBER_MASK);
229         }
230 
231         if (int_in) {
232                 dev->int_in = &int_in->desc;
233                 dev->in_int_pipe = usb_rcvintpipe(udev,
234                                 int_in->desc.bEndpointAddress
235                                         & USB_ENDPOINT_NUMBER_MASK);
236         }
237 
238         if (int_out) {
239                 dev->int_out = &int_out->desc;
240                 dev->out_int_pipe = usb_sndintpipe(udev,
241                                 int_out->desc.bEndpointAddress
242                                         & USB_ENDPOINT_NUMBER_MASK);
243         }
244         return 0;
245 }
246 
247 /*-------------------------------------------------------------------------*/
248 
249 /* Support for testing basic non-queued I/O streams.
250  *
251  * These just package urbs as requests that can be easily canceled.
252  * Each urb's data buffer is dynamically allocated; callers can fill
253  * them with non-zero test data (or test for it) when appropriate.
254  */
255 
256 static void simple_callback(struct urb *urb)
257 {
258         complete(urb->context);
259 }
260 
261 static struct urb *usbtest_alloc_urb(
262         struct usb_device       *udev,
263         int                     pipe,
264         unsigned long           bytes,
265         unsigned                transfer_flags,
266         unsigned                offset,
267         u8                      bInterval,
268         usb_complete_t          complete_fn)
269 {
270         struct urb              *urb;
271 
272         urb = usb_alloc_urb(0, GFP_KERNEL);
273         if (!urb)
274                 return urb;
275 
276         if (bInterval)
277                 usb_fill_int_urb(urb, udev, pipe, NULL, bytes, complete_fn,
278                                 NULL, bInterval);
279         else
280                 usb_fill_bulk_urb(urb, udev, pipe, NULL, bytes, complete_fn,
281                                 NULL);
282 
283         urb->interval = (udev->speed == USB_SPEED_HIGH)
284                         ? (INTERRUPT_RATE << 3)
285                         : INTERRUPT_RATE;
286         urb->transfer_flags = transfer_flags;
287         if (usb_pipein(pipe))
288                 urb->transfer_flags |= URB_SHORT_NOT_OK;
289 
290         if ((bytes + offset) == 0)
291                 return urb;
292 
293         if (urb->transfer_flags & URB_NO_TRANSFER_DMA_MAP)
294                 urb->transfer_buffer = usb_alloc_coherent(udev, bytes + offset,
295                         GFP_KERNEL, &urb->transfer_dma);
296         else
297                 urb->transfer_buffer = kmalloc(bytes + offset, GFP_KERNEL);
298 
299         if (!urb->transfer_buffer) {
300                 usb_free_urb(urb);
301                 return NULL;
302         }
303 
304         /* To test unaligned transfers add an offset and fill the
305                 unused memory with a guard value */
306         if (offset) {
307                 memset(urb->transfer_buffer, GUARD_BYTE, offset);
308                 urb->transfer_buffer += offset;
309                 if (urb->transfer_flags & URB_NO_TRANSFER_DMA_MAP)
310                         urb->transfer_dma += offset;
311         }
312 
313         /* For inbound transfers use guard byte so that test fails if
314                 data not correctly copied */
315         memset(urb->transfer_buffer,
316                         usb_pipein(urb->pipe) ? GUARD_BYTE : 0,
317                         bytes);
318         return urb;
319 }
320 
321 static struct urb *simple_alloc_urb(
322         struct usb_device       *udev,
323         int                     pipe,
324         unsigned long           bytes,
325         u8                      bInterval)
326 {
327         return usbtest_alloc_urb(udev, pipe, bytes, URB_NO_TRANSFER_DMA_MAP, 0,
328                         bInterval, simple_callback);
329 }
330 
331 static struct urb *complicated_alloc_urb(
332         struct usb_device       *udev,
333         int                     pipe,
334         unsigned long           bytes,
335         u8                      bInterval)
336 {
337         return usbtest_alloc_urb(udev, pipe, bytes, URB_NO_TRANSFER_DMA_MAP, 0,
338                         bInterval, complicated_callback);
339 }
340 
341 static unsigned pattern;
342 static unsigned mod_pattern;
343 module_param_named(pattern, mod_pattern, uint, S_IRUGO | S_IWUSR);
344 MODULE_PARM_DESC(mod_pattern, "i/o pattern (0 == zeroes)");
345 
346 static unsigned get_maxpacket(struct usb_device *udev, int pipe)
347 {
348         struct usb_host_endpoint        *ep;
349 
350         ep = usb_pipe_endpoint(udev, pipe);
351         return le16_to_cpup(&ep->desc.wMaxPacketSize);
352 }
353 
354 static void simple_fill_buf(struct urb *urb)
355 {
356         unsigned        i;
357         u8              *buf = urb->transfer_buffer;
358         unsigned        len = urb->transfer_buffer_length;
359         unsigned        maxpacket;
360 
361         switch (pattern) {
362         default:
363                 /* FALLTHROUGH */
364         case 0:
365                 memset(buf, 0, len);
366                 break;
367         case 1:                 /* mod63 */
368                 maxpacket = get_maxpacket(urb->dev, urb->pipe);
369                 for (i = 0; i < len; i++)
370                         *buf++ = (u8) ((i % maxpacket) % 63);
371                 break;
372         }
373 }
374 
375 static inline unsigned long buffer_offset(void *buf)
376 {
377         return (unsigned long)buf & (ARCH_KMALLOC_MINALIGN - 1);
378 }
379 
380 static int check_guard_bytes(struct usbtest_dev *tdev, struct urb *urb)
381 {
382         u8 *buf = urb->transfer_buffer;
383         u8 *guard = buf - buffer_offset(buf);
384         unsigned i;
385 
386         for (i = 0; guard < buf; i++, guard++) {
387                 if (*guard != GUARD_BYTE) {
388                         ERROR(tdev, "guard byte[%d] %d (not %d)\n",
389                                 i, *guard, GUARD_BYTE);
390                         return -EINVAL;
391                 }
392         }
393         return 0;
394 }
395 
396 static int simple_check_buf(struct usbtest_dev *tdev, struct urb *urb)
397 {
398         unsigned        i;
399         u8              expected;
400         u8              *buf = urb->transfer_buffer;
401         unsigned        len = urb->actual_length;
402         unsigned        maxpacket = get_maxpacket(urb->dev, urb->pipe);
403 
404         int ret = check_guard_bytes(tdev, urb);
405         if (ret)
406                 return ret;
407 
408         for (i = 0; i < len; i++, buf++) {
409                 switch (pattern) {
410                 /* all-zeroes has no synchronization issues */
411                 case 0:
412                         expected = 0;
413                         break;
414                 /* mod63 stays in sync with short-terminated transfers,
415                  * or otherwise when host and gadget agree on how large
416                  * each usb transfer request should be.  resync is done
417                  * with set_interface or set_config.
418                  */
419                 case 1:                 /* mod63 */
420                         expected = (i % maxpacket) % 63;
421                         break;
422                 /* always fail unsupported patterns */
423                 default:
424                         expected = !*buf;
425                         break;
426                 }
427                 if (*buf == expected)
428                         continue;
429                 ERROR(tdev, "buf[%d] = %d (not %d)\n", i, *buf, expected);
430                 return -EINVAL;
431         }
432         return 0;
433 }
434 
435 static void simple_free_urb(struct urb *urb)
436 {
437         unsigned long offset = buffer_offset(urb->transfer_buffer);
438 
439         if (urb->transfer_flags & URB_NO_TRANSFER_DMA_MAP)
440                 usb_free_coherent(
441                         urb->dev,
442                         urb->transfer_buffer_length + offset,
443                         urb->transfer_buffer - offset,
444                         urb->transfer_dma - offset);
445         else
446                 kfree(urb->transfer_buffer - offset);
447         usb_free_urb(urb);
448 }
449 
450 static int simple_io(
451         struct usbtest_dev      *tdev,
452         struct urb              *urb,
453         int                     iterations,
454         int                     vary,
455         int                     expected,
456         const char              *label
457 )
458 {
459         struct usb_device       *udev = urb->dev;
460         int                     max = urb->transfer_buffer_length;
461         struct completion       completion;
462         int                     retval = 0;
463         unsigned long           expire;
464 
465         urb->context = &completion;
466         while (retval == 0 && iterations-- > 0) {
467                 init_completion(&completion);
468                 if (usb_pipeout(urb->pipe)) {
469                         simple_fill_buf(urb);
470                         urb->transfer_flags |= URB_ZERO_PACKET;
471                 }
472                 retval = usb_submit_urb(urb, GFP_KERNEL);
473                 if (retval != 0)
474                         break;
475 
476                 expire = msecs_to_jiffies(SIMPLE_IO_TIMEOUT);
477                 if (!wait_for_completion_timeout(&completion, expire)) {
478                         usb_kill_urb(urb);
479                         retval = (urb->status == -ENOENT ?
480                                   -ETIMEDOUT : urb->status);
481                 } else {
482                         retval = urb->status;
483                 }
484 
485                 urb->dev = udev;
486                 if (retval == 0 && usb_pipein(urb->pipe))
487                         retval = simple_check_buf(tdev, urb);
488 
489                 if (vary) {
490                         int     len = urb->transfer_buffer_length;
491 
492                         len += vary;
493                         len %= max;
494                         if (len == 0)
495                                 len = (vary < max) ? vary : max;
496                         urb->transfer_buffer_length = len;
497                 }
498 
499                 /* FIXME if endpoint halted, clear halt (and log) */
500         }
501         urb->transfer_buffer_length = max;
502 
503         if (expected != retval)
504                 dev_err(&udev->dev,
505                         "%s failed, iterations left %d, status %d (not %d)\n",
506                                 label, iterations, retval, expected);
507         return retval;
508 }
509 
510 
511 /*-------------------------------------------------------------------------*/
512 
513 /* We use scatterlist primitives to test queued I/O.
514  * Yes, this also tests the scatterlist primitives.
515  */
516 
517 static void free_sglist(struct scatterlist *sg, int nents)
518 {
519         unsigned                i;
520 
521         if (!sg)
522                 return;
523         for (i = 0; i < nents; i++) {
524                 if (!sg_page(&sg[i]))
525                         continue;
526                 kfree(sg_virt(&sg[i]));
527         }
528         kfree(sg);
529 }
530 
531 static struct scatterlist *
532 alloc_sglist(int nents, int max, int vary, struct usbtest_dev *dev, int pipe)
533 {
534         struct scatterlist      *sg;
535         unsigned int            n_size = 0;
536         unsigned                i;
537         unsigned                size = max;
538         unsigned                maxpacket =
539                 get_maxpacket(interface_to_usbdev(dev->intf), pipe);
540 
541         if (max == 0)
542                 return NULL;
543 
544         sg = kmalloc_array(nents, sizeof(*sg), GFP_KERNEL);
545         if (!sg)
546                 return NULL;
547         sg_init_table(sg, nents);
548 
549         for (i = 0; i < nents; i++) {
550                 char            *buf;
551                 unsigned        j;
552 
553                 buf = kzalloc(size, GFP_KERNEL);
554                 if (!buf) {
555                         free_sglist(sg, i);
556                         return NULL;
557                 }
558 
559                 /* kmalloc pages are always physically contiguous! */
560                 sg_set_buf(&sg[i], buf, size);
561 
562                 switch (pattern) {
563                 case 0:
564                         /* already zeroed */
565                         break;
566                 case 1:
567                         for (j = 0; j < size; j++)
568                                 *buf++ = (u8) (((j + n_size) % maxpacket) % 63);
569                         n_size += size;
570                         break;
571                 }
572 
573                 if (vary) {
574                         size += vary;
575                         size %= max;
576                         if (size == 0)
577                                 size = (vary < max) ? vary : max;
578                 }
579         }
580 
581         return sg;
582 }
583 
584 static void sg_timeout(unsigned long _req)
585 {
586         struct usb_sg_request   *req = (struct usb_sg_request *) _req;
587 
588         usb_sg_cancel(req);
589 }
590 
591 static int perform_sglist(
592         struct usbtest_dev      *tdev,
593         unsigned                iterations,
594         int                     pipe,
595         struct usb_sg_request   *req,
596         struct scatterlist      *sg,
597         int                     nents
598 )
599 {
600         struct usb_device       *udev = testdev_to_usbdev(tdev);
601         int                     retval = 0;
602         struct timer_list       sg_timer;
603 
604         setup_timer_on_stack(&sg_timer, sg_timeout, (unsigned long) req);
605 
606         while (retval == 0 && iterations-- > 0) {
607                 retval = usb_sg_init(req, udev, pipe,
608                                 (udev->speed == USB_SPEED_HIGH)
609                                         ? (INTERRUPT_RATE << 3)
610                                         : INTERRUPT_RATE,
611                                 sg, nents, 0, GFP_KERNEL);
612 
613                 if (retval)
614                         break;
615                 mod_timer(&sg_timer, jiffies +
616                                 msecs_to_jiffies(SIMPLE_IO_TIMEOUT));
617                 usb_sg_wait(req);
618                 if (!del_timer_sync(&sg_timer))
619                         retval = -ETIMEDOUT;
620                 else
621                         retval = req->status;
622 
623                 /* FIXME check resulting data pattern */
624 
625                 /* FIXME if endpoint halted, clear halt (and log) */
626         }
627 
628         /* FIXME for unlink or fault handling tests, don't report
629          * failure if retval is as we expected ...
630          */
631         if (retval)
632                 ERROR(tdev, "perform_sglist failed, "
633                                 "iterations left %d, status %d\n",
634                                 iterations, retval);
635         return retval;
636 }
637 
638 
639 /*-------------------------------------------------------------------------*/
640 
641 /* unqueued control message testing
642  *
643  * there's a nice set of device functional requirements in chapter 9 of the
644  * usb 2.0 spec, which we can apply to ANY device, even ones that don't use
645  * special test firmware.
646  *
647  * we know the device is configured (or suspended) by the time it's visible
648  * through usbfs.  we can't change that, so we won't test enumeration (which
649  * worked 'well enough' to get here, this time), power management (ditto),
650  * or remote wakeup (which needs human interaction).
651  */
652 
653 static unsigned realworld = 1;
654 module_param(realworld, uint, 0);
655 MODULE_PARM_DESC(realworld, "clear to demand stricter spec compliance");
656 
657 static int get_altsetting(struct usbtest_dev *dev)
658 {
659         struct usb_interface    *iface = dev->intf;
660         struct usb_device       *udev = interface_to_usbdev(iface);
661         int                     retval;
662 
663         retval = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
664                         USB_REQ_GET_INTERFACE, USB_DIR_IN|USB_RECIP_INTERFACE,
665                         0, iface->altsetting[0].desc.bInterfaceNumber,
666                         dev->buf, 1, USB_CTRL_GET_TIMEOUT);
667         switch (retval) {
668         case 1:
669                 return dev->buf[0];
670         case 0:
671                 retval = -ERANGE;
672                 /* FALLTHROUGH */
673         default:
674                 return retval;
675         }
676 }
677 
678 static int set_altsetting(struct usbtest_dev *dev, int alternate)
679 {
680         struct usb_interface            *iface = dev->intf;
681         struct usb_device               *udev;
682 
683         if (alternate < 0 || alternate >= 256)
684                 return -EINVAL;
685 
686         udev = interface_to_usbdev(iface);
687         return usb_set_interface(udev,
688                         iface->altsetting[0].desc.bInterfaceNumber,
689                         alternate);
690 }
691 
692 static int is_good_config(struct usbtest_dev *tdev, int len)
693 {
694         struct usb_config_descriptor    *config;
695 
696         if (len < sizeof(*config))
697                 return 0;
698         config = (struct usb_config_descriptor *) tdev->buf;
699 
700         switch (config->bDescriptorType) {
701         case USB_DT_CONFIG:
702         case USB_DT_OTHER_SPEED_CONFIG:
703                 if (config->bLength != 9) {
704                         ERROR(tdev, "bogus config descriptor length\n");
705                         return 0;
706                 }
707                 /* this bit 'must be 1' but often isn't */
708                 if (!realworld && !(config->bmAttributes & 0x80)) {
709                         ERROR(tdev, "high bit of config attributes not set\n");
710                         return 0;
711                 }
712                 if (config->bmAttributes & 0x1f) {      /* reserved == 0 */
713                         ERROR(tdev, "reserved config bits set\n");
714                         return 0;
715                 }
716                 break;
717         default:
718                 return 0;
719         }
720 
721         if (le16_to_cpu(config->wTotalLength) == len)   /* read it all */
722                 return 1;
723         if (le16_to_cpu(config->wTotalLength) >= TBUF_SIZE)     /* max partial read */
724                 return 1;
725         ERROR(tdev, "bogus config descriptor read size\n");
726         return 0;
727 }
728 
729 static int is_good_ext(struct usbtest_dev *tdev, u8 *buf)
730 {
731         struct usb_ext_cap_descriptor *ext;
732         u32 attr;
733 
734         ext = (struct usb_ext_cap_descriptor *) buf;
735 
736         if (ext->bLength != USB_DT_USB_EXT_CAP_SIZE) {
737                 ERROR(tdev, "bogus usb 2.0 extension descriptor length\n");
738                 return 0;
739         }
740 
741         attr = le32_to_cpu(ext->bmAttributes);
742         /* bits[1:15] is used and others are reserved */
743         if (attr & ~0xfffe) {   /* reserved == 0 */
744                 ERROR(tdev, "reserved bits set\n");
745                 return 0;
746         }
747 
748         return 1;
749 }
750 
751 static int is_good_ss_cap(struct usbtest_dev *tdev, u8 *buf)
752 {
753         struct usb_ss_cap_descriptor *ss;
754 
755         ss = (struct usb_ss_cap_descriptor *) buf;
756 
757         if (ss->bLength != USB_DT_USB_SS_CAP_SIZE) {
758                 ERROR(tdev, "bogus superspeed device capability descriptor length\n");
759                 return 0;
760         }
761 
762         /*
763          * only bit[1] of bmAttributes is used for LTM and others are
764          * reserved
765          */
766         if (ss->bmAttributes & ~0x02) { /* reserved == 0 */
767                 ERROR(tdev, "reserved bits set in bmAttributes\n");
768                 return 0;
769         }
770 
771         /* bits[0:3] of wSpeedSupported is used and others are reserved */
772         if (le16_to_cpu(ss->wSpeedSupported) & ~0x0f) { /* reserved == 0 */
773                 ERROR(tdev, "reserved bits set in wSpeedSupported\n");
774                 return 0;
775         }
776 
777         return 1;
778 }
779 
780 static int is_good_con_id(struct usbtest_dev *tdev, u8 *buf)
781 {
782         struct usb_ss_container_id_descriptor *con_id;
783 
784         con_id = (struct usb_ss_container_id_descriptor *) buf;
785 
786         if (con_id->bLength != USB_DT_USB_SS_CONTN_ID_SIZE) {
787                 ERROR(tdev, "bogus container id descriptor length\n");
788                 return 0;
789         }
790 
791         if (con_id->bReserved) {        /* reserved == 0 */
792                 ERROR(tdev, "reserved bits set\n");
793                 return 0;
794         }
795 
796         return 1;
797 }
798 
799 /* sanity test for standard requests working with usb_control_mesg() and some
800  * of the utility functions which use it.
801  *
802  * this doesn't test how endpoint halts behave or data toggles get set, since
803  * we won't do I/O to bulk/interrupt endpoints here (which is how to change
804  * halt or toggle).  toggle testing is impractical without support from hcds.
805  *
806  * this avoids failing devices linux would normally work with, by not testing
807  * config/altsetting operations for devices that only support their defaults.
808  * such devices rarely support those needless operations.
809  *
810  * NOTE that since this is a sanity test, it's not examining boundary cases
811  * to see if usbcore, hcd, and device all behave right.  such testing would
812  * involve varied read sizes and other operation sequences.
813  */
814 static int ch9_postconfig(struct usbtest_dev *dev)
815 {
816         struct usb_interface    *iface = dev->intf;
817         struct usb_device       *udev = interface_to_usbdev(iface);
818         int                     i, alt, retval;
819 
820         /* [9.2.3] if there's more than one altsetting, we need to be able to
821          * set and get each one.  mostly trusts the descriptors from usbcore.
822          */
823         for (i = 0; i < iface->num_altsetting; i++) {
824 
825                 /* 9.2.3 constrains the range here */
826                 alt = iface->altsetting[i].desc.bAlternateSetting;
827                 if (alt < 0 || alt >= iface->num_altsetting) {
828                         dev_err(&iface->dev,
829                                         "invalid alt [%d].bAltSetting = %d\n",
830                                         i, alt);
831                 }
832 
833                 /* [real world] get/set unimplemented if there's only one */
834                 if (realworld && iface->num_altsetting == 1)
835                         continue;
836 
837                 /* [9.4.10] set_interface */
838                 retval = set_altsetting(dev, alt);
839                 if (retval) {
840                         dev_err(&iface->dev, "can't set_interface = %d, %d\n",
841                                         alt, retval);
842                         return retval;
843                 }
844 
845                 /* [9.4.4] get_interface always works */
846                 retval = get_altsetting(dev);
847                 if (retval != alt) {
848                         dev_err(&iface->dev, "get alt should be %d, was %d\n",
849                                         alt, retval);
850                         return (retval < 0) ? retval : -EDOM;
851                 }
852 
853         }
854 
855         /* [real world] get_config unimplemented if there's only one */
856         if (!realworld || udev->descriptor.bNumConfigurations != 1) {
857                 int     expected = udev->actconfig->desc.bConfigurationValue;
858 
859                 /* [9.4.2] get_configuration always works
860                  * ... although some cheap devices (like one TI Hub I've got)
861                  * won't return config descriptors except before set_config.
862                  */
863                 retval = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
864                                 USB_REQ_GET_CONFIGURATION,
865                                 USB_DIR_IN | USB_RECIP_DEVICE,
866                                 0, 0, dev->buf, 1, USB_CTRL_GET_TIMEOUT);
867                 if (retval != 1 || dev->buf[0] != expected) {
868                         dev_err(&iface->dev, "get config --> %d %d (1 %d)\n",
869                                 retval, dev->buf[0], expected);
870                         return (retval < 0) ? retval : -EDOM;
871                 }
872         }
873 
874         /* there's always [9.4.3] a device descriptor [9.6.1] */
875         retval = usb_get_descriptor(udev, USB_DT_DEVICE, 0,
876                         dev->buf, sizeof(udev->descriptor));
877         if (retval != sizeof(udev->descriptor)) {
878                 dev_err(&iface->dev, "dev descriptor --> %d\n", retval);
879                 return (retval < 0) ? retval : -EDOM;
880         }
881 
882         /*
883          * there's always [9.4.3] a bos device descriptor [9.6.2] in USB
884          * 3.0 spec
885          */
886         if (le16_to_cpu(udev->descriptor.bcdUSB) >= 0x0210) {
887                 struct usb_bos_descriptor *bos = NULL;
888                 struct usb_dev_cap_header *header = NULL;
889                 unsigned total, num, length;
890                 u8 *buf;
891 
892                 retval = usb_get_descriptor(udev, USB_DT_BOS, 0, dev->buf,
893                                 sizeof(*udev->bos->desc));
894                 if (retval != sizeof(*udev->bos->desc)) {
895                         dev_err(&iface->dev, "bos descriptor --> %d\n", retval);
896                         return (retval < 0) ? retval : -EDOM;
897                 }
898 
899                 bos = (struct usb_bos_descriptor *)dev->buf;
900                 total = le16_to_cpu(bos->wTotalLength);
901                 num = bos->bNumDeviceCaps;
902 
903                 if (total > TBUF_SIZE)
904                         total = TBUF_SIZE;
905 
906                 /*
907                  * get generic device-level capability descriptors [9.6.2]
908                  * in USB 3.0 spec
909                  */
910                 retval = usb_get_descriptor(udev, USB_DT_BOS, 0, dev->buf,
911                                 total);
912                 if (retval != total) {
913                         dev_err(&iface->dev, "bos descriptor set --> %d\n",
914                                         retval);
915                         return (retval < 0) ? retval : -EDOM;
916                 }
917 
918                 length = sizeof(*udev->bos->desc);
919                 buf = dev->buf;
920                 for (i = 0; i < num; i++) {
921                         buf += length;
922                         if (buf + sizeof(struct usb_dev_cap_header) >
923                                         dev->buf + total)
924                                 break;
925 
926                         header = (struct usb_dev_cap_header *)buf;
927                         length = header->bLength;
928 
929                         if (header->bDescriptorType !=
930                                         USB_DT_DEVICE_CAPABILITY) {
931                                 dev_warn(&udev->dev, "not device capability descriptor, skip\n");
932                                 continue;
933                         }
934 
935                         switch (header->bDevCapabilityType) {
936                         case USB_CAP_TYPE_EXT:
937                                 if (buf + USB_DT_USB_EXT_CAP_SIZE >
938                                                 dev->buf + total ||
939                                                 !is_good_ext(dev, buf)) {
940                                         dev_err(&iface->dev, "bogus usb 2.0 extension descriptor\n");
941                                         return -EDOM;
942                                 }
943                                 break;
944                         case USB_SS_CAP_TYPE:
945                                 if (buf + USB_DT_USB_SS_CAP_SIZE >
946                                                 dev->buf + total ||
947                                                 !is_good_ss_cap(dev, buf)) {
948                                         dev_err(&iface->dev, "bogus superspeed device capability descriptor\n");
949                                         return -EDOM;
950                                 }
951                                 break;
952                         case CONTAINER_ID_TYPE:
953                                 if (buf + USB_DT_USB_SS_CONTN_ID_SIZE >
954                                                 dev->buf + total ||
955                                                 !is_good_con_id(dev, buf)) {
956                                         dev_err(&iface->dev, "bogus container id descriptor\n");
957                                         return -EDOM;
958                                 }
959                                 break;
960                         default:
961                                 break;
962                         }
963                 }
964         }
965 
966         /* there's always [9.4.3] at least one config descriptor [9.6.3] */
967         for (i = 0; i < udev->descriptor.bNumConfigurations; i++) {
968                 retval = usb_get_descriptor(udev, USB_DT_CONFIG, i,
969                                 dev->buf, TBUF_SIZE);
970                 if (!is_good_config(dev, retval)) {
971                         dev_err(&iface->dev,
972                                         "config [%d] descriptor --> %d\n",
973                                         i, retval);
974                         return (retval < 0) ? retval : -EDOM;
975                 }
976 
977                 /* FIXME cross-checking udev->config[i] to make sure usbcore
978                  * parsed it right (etc) would be good testing paranoia
979                  */
980         }
981 
982         /* and sometimes [9.2.6.6] speed dependent descriptors */
983         if (le16_to_cpu(udev->descriptor.bcdUSB) == 0x0200) {
984                 struct usb_qualifier_descriptor *d = NULL;
985 
986                 /* device qualifier [9.6.2] */
987                 retval = usb_get_descriptor(udev,
988                                 USB_DT_DEVICE_QUALIFIER, 0, dev->buf,
989                                 sizeof(struct usb_qualifier_descriptor));
990                 if (retval == -EPIPE) {
991                         if (udev->speed == USB_SPEED_HIGH) {
992                                 dev_err(&iface->dev,
993                                                 "hs dev qualifier --> %d\n",
994                                                 retval);
995                                 return (retval < 0) ? retval : -EDOM;
996                         }
997                         /* usb2.0 but not high-speed capable; fine */
998                 } else if (retval != sizeof(struct usb_qualifier_descriptor)) {
999                         dev_err(&iface->dev, "dev qualifier --> %d\n", retval);
1000                         return (retval < 0) ? retval : -EDOM;
1001                 } else
1002                         d = (struct usb_qualifier_descriptor *) dev->buf;
1003 
1004                 /* might not have [9.6.2] any other-speed configs [9.6.4] */
1005                 if (d) {
1006                         unsigned max = d->bNumConfigurations;
1007                         for (i = 0; i < max; i++) {
1008                                 retval = usb_get_descriptor(udev,
1009                                         USB_DT_OTHER_SPEED_CONFIG, i,
1010                                         dev->buf, TBUF_SIZE);
1011                                 if (!is_good_config(dev, retval)) {
1012                                         dev_err(&iface->dev,
1013                                                 "other speed config --> %d\n",
1014                                                 retval);
1015                                         return (retval < 0) ? retval : -EDOM;
1016                                 }
1017                         }
1018                 }
1019         }
1020         /* FIXME fetch strings from at least the device descriptor */
1021 
1022         /* [9.4.5] get_status always works */
1023         retval = usb_get_status(udev, USB_RECIP_DEVICE, 0, dev->buf);
1024         if (retval) {
1025                 dev_err(&iface->dev, "get dev status --> %d\n", retval);
1026                 return retval;
1027         }
1028 
1029         /* FIXME configuration.bmAttributes says if we could try to set/clear
1030          * the device's remote wakeup feature ... if we can, test that here
1031          */
1032 
1033         retval = usb_get_status(udev, USB_RECIP_INTERFACE,
1034                         iface->altsetting[0].desc.bInterfaceNumber, dev->buf);
1035         if (retval) {
1036                 dev_err(&iface->dev, "get interface status --> %d\n", retval);
1037                 return retval;
1038         }
1039         /* FIXME get status for each endpoint in the interface */
1040 
1041         return 0;
1042 }
1043 
1044 /*-------------------------------------------------------------------------*/
1045 
1046 /* use ch9 requests to test whether:
1047  *   (a) queues work for control, keeping N subtests queued and
1048  *       active (auto-resubmit) for M loops through the queue.
1049  *   (b) protocol stalls (control-only) will autorecover.
1050  *       it's not like bulk/intr; no halt clearing.
1051  *   (c) short control reads are reported and handled.
1052  *   (d) queues are always processed in-order
1053  */
1054 
1055 struct ctrl_ctx {
1056         spinlock_t              lock;
1057         struct usbtest_dev      *dev;
1058         struct completion       complete;
1059         unsigned                count;
1060         unsigned                pending;
1061         int                     status;
1062         struct urb              **urb;
1063         struct usbtest_param_32 *param;
1064         int                     last;
1065 };
1066 
1067 #define NUM_SUBCASES    16              /* how many test subcases here? */
1068 
1069 struct subcase {
1070         struct usb_ctrlrequest  setup;
1071         int                     number;
1072         int                     expected;
1073 };
1074 
1075 static void ctrl_complete(struct urb *urb)
1076 {
1077         struct ctrl_ctx         *ctx = urb->context;
1078         struct usb_ctrlrequest  *reqp;
1079         struct subcase          *subcase;
1080         int                     status = urb->status;
1081 
1082         reqp = (struct usb_ctrlrequest *)urb->setup_packet;
1083         subcase = container_of(reqp, struct subcase, setup);
1084 
1085         spin_lock(&ctx->lock);
1086         ctx->count--;
1087         ctx->pending--;
1088 
1089         /* queue must transfer and complete in fifo order, unless
1090          * usb_unlink_urb() is used to unlink something not at the
1091          * physical queue head (not tested).
1092          */
1093         if (subcase->number > 0) {
1094                 if ((subcase->number - ctx->last) != 1) {
1095                         ERROR(ctx->dev,
1096                                 "subcase %d completed out of order, last %d\n",
1097                                 subcase->number, ctx->last);
1098                         status = -EDOM;
1099                         ctx->last = subcase->number;
1100                         goto error;
1101                 }
1102         }
1103         ctx->last = subcase->number;
1104 
1105         /* succeed or fault in only one way? */
1106         if (status == subcase->expected)
1107                 status = 0;
1108 
1109         /* async unlink for cleanup? */
1110         else if (status != -ECONNRESET) {
1111 
1112                 /* some faults are allowed, not required */
1113                 if (subcase->expected > 0 && (
1114                           ((status == -subcase->expected        /* happened */
1115                            || status == 0))))                   /* didn't */
1116                         status = 0;
1117                 /* sometimes more than one fault is allowed */
1118                 else if (subcase->number == 12 && status == -EPIPE)
1119                         status = 0;
1120                 else
1121                         ERROR(ctx->dev, "subtest %d error, status %d\n",
1122                                         subcase->number, status);
1123         }
1124 
1125         /* unexpected status codes mean errors; ideally, in hardware */
1126         if (status) {
1127 error:
1128                 if (ctx->status == 0) {
1129                         int             i;
1130 
1131                         ctx->status = status;
1132                         ERROR(ctx->dev, "control queue %02x.%02x, err %d, "
1133                                         "%d left, subcase %d, len %d/%d\n",
1134                                         reqp->bRequestType, reqp->bRequest,
1135                                         status, ctx->count, subcase->number,
1136                                         urb->actual_length,
1137                                         urb->transfer_buffer_length);
1138 
1139                         /* FIXME this "unlink everything" exit route should
1140                          * be a separate test case.
1141                          */
1142 
1143                         /* unlink whatever's still pending */
1144                         for (i = 1; i < ctx->param->sglen; i++) {
1145                                 struct urb *u = ctx->urb[
1146                                                         (i + subcase->number)
1147                                                         % ctx->param->sglen];
1148 
1149                                 if (u == urb || !u->dev)
1150                                         continue;
1151                                 spin_unlock(&ctx->lock);
1152                                 status = usb_unlink_urb(u);
1153                                 spin_lock(&ctx->lock);
1154                                 switch (status) {
1155                                 case -EINPROGRESS:
1156                                 case -EBUSY:
1157                                 case -EIDRM:
1158                                         continue;
1159                                 default:
1160                                         ERROR(ctx->dev, "urb unlink --> %d\n",
1161                                                         status);
1162                                 }
1163                         }
1164                         status = ctx->status;
1165                 }
1166         }
1167 
1168         /* resubmit if we need to, else mark this as done */
1169         if ((status == 0) && (ctx->pending < ctx->count)) {
1170                 status = usb_submit_urb(urb, GFP_ATOMIC);
1171                 if (status != 0) {
1172                         ERROR(ctx->dev,
1173                                 "can't resubmit ctrl %02x.%02x, err %d\n",
1174                                 reqp->bRequestType, reqp->bRequest, status);
1175                         urb->dev = NULL;
1176                 } else
1177                         ctx->pending++;
1178         } else
1179                 urb->dev = NULL;
1180 
1181         /* signal completion when nothing's queued */
1182         if (ctx->pending == 0)
1183                 complete(&ctx->complete);
1184         spin_unlock(&ctx->lock);
1185 }
1186 
1187 static int
1188 test_ctrl_queue(struct usbtest_dev *dev, struct usbtest_param_32 *param)
1189 {
1190         struct usb_device       *udev = testdev_to_usbdev(dev);
1191         struct urb              **urb;
1192         struct ctrl_ctx         context;
1193         int                     i;
1194 
1195         if (param->sglen == 0 || param->iterations > UINT_MAX / param->sglen)
1196                 return -EOPNOTSUPP;
1197 
1198         spin_lock_init(&context.lock);
1199         context.dev = dev;
1200         init_completion(&context.complete);
1201         context.count = param->sglen * param->iterations;
1202         context.pending = 0;
1203         context.status = -ENOMEM;
1204         context.param = param;
1205         context.last = -1;
1206 
1207         /* allocate and init the urbs we'll queue.
1208          * as with bulk/intr sglists, sglen is the queue depth; it also
1209          * controls which subtests run (more tests than sglen) or rerun.
1210          */
1211         urb = kcalloc(param->sglen, sizeof(struct urb *), GFP_KERNEL);
1212         if (!urb)
1213                 return -ENOMEM;
1214         for (i = 0; i < param->sglen; i++) {
1215                 int                     pipe = usb_rcvctrlpipe(udev, 0);
1216                 unsigned                len;
1217                 struct urb              *u;
1218                 struct usb_ctrlrequest  req;
1219                 struct subcase          *reqp;
1220 
1221                 /* sign of this variable means:
1222                  *  -: tested code must return this (negative) error code
1223                  *  +: tested code may return this (negative too) error code
1224                  */
1225                 int                     expected = 0;
1226 
1227                 /* requests here are mostly expected to succeed on any
1228                  * device, but some are chosen to trigger protocol stalls
1229                  * or short reads.
1230                  */
1231                 memset(&req, 0, sizeof(req));
1232                 req.bRequest = USB_REQ_GET_DESCRIPTOR;
1233                 req.bRequestType = USB_DIR_IN|USB_RECIP_DEVICE;
1234 
1235                 switch (i % NUM_SUBCASES) {
1236                 case 0:         /* get device descriptor */
1237                         req.wValue = cpu_to_le16(USB_DT_DEVICE << 8);
1238                         len = sizeof(struct usb_device_descriptor);
1239                         break;
1240                 case 1:         /* get first config descriptor (only) */
1241                         req.wValue = cpu_to_le16((USB_DT_CONFIG << 8) | 0);
1242                         len = sizeof(struct usb_config_descriptor);
1243                         break;
1244                 case 2:         /* get altsetting (OFTEN STALLS) */
1245                         req.bRequest = USB_REQ_GET_INTERFACE;
1246                         req.bRequestType = USB_DIR_IN|USB_RECIP_INTERFACE;
1247                         /* index = 0 means first interface */
1248                         len = 1;
1249                         expected = EPIPE;
1250                         break;
1251                 case 3:         /* get interface status */
1252                         req.bRequest = USB_REQ_GET_STATUS;
1253                         req.bRequestType = USB_DIR_IN|USB_RECIP_INTERFACE;
1254                         /* interface 0 */
1255                         len = 2;
1256                         break;
1257                 case 4:         /* get device status */
1258                         req.bRequest = USB_REQ_GET_STATUS;
1259                         req.bRequestType = USB_DIR_IN|USB_RECIP_DEVICE;
1260                         len = 2;
1261                         break;
1262                 case 5:         /* get device qualifier (MAY STALL) */
1263                         req.wValue = cpu_to_le16 (USB_DT_DEVICE_QUALIFIER << 8);
1264                         len = sizeof(struct usb_qualifier_descriptor);
1265                         if (udev->speed != USB_SPEED_HIGH)
1266                                 expected = EPIPE;
1267                         break;
1268                 case 6:         /* get first config descriptor, plus interface */
1269                         req.wValue = cpu_to_le16((USB_DT_CONFIG << 8) | 0);
1270                         len = sizeof(struct usb_config_descriptor);
1271                         len += sizeof(struct usb_interface_descriptor);
1272                         break;
1273                 case 7:         /* get interface descriptor (ALWAYS STALLS) */
1274                         req.wValue = cpu_to_le16 (USB_DT_INTERFACE << 8);
1275                         /* interface == 0 */
1276                         len = sizeof(struct usb_interface_descriptor);
1277                         expected = -EPIPE;
1278                         break;
1279                 /* NOTE: two consecutive stalls in the queue here.
1280                  *  that tests fault recovery a bit more aggressively. */
1281                 case 8:         /* clear endpoint halt (MAY STALL) */
1282                         req.bRequest = USB_REQ_CLEAR_FEATURE;
1283                         req.bRequestType = USB_RECIP_ENDPOINT;
1284                         /* wValue 0 == ep halt */
1285                         /* wIndex 0 == ep0 (shouldn't halt!) */
1286                         len = 0;
1287                         pipe = usb_sndctrlpipe(udev, 0);
1288                         expected = EPIPE;
1289                         break;
1290                 case 9:         /* get endpoint status */
1291                         req.bRequest = USB_REQ_GET_STATUS;
1292                         req.bRequestType = USB_DIR_IN|USB_RECIP_ENDPOINT;
1293                         /* endpoint 0 */
1294                         len = 2;
1295                         break;
1296                 case 10:        /* trigger short read (EREMOTEIO) */
1297                         req.wValue = cpu_to_le16((USB_DT_CONFIG << 8) | 0);
1298                         len = 1024;
1299                         expected = -EREMOTEIO;
1300                         break;
1301                 /* NOTE: two consecutive _different_ faults in the queue. */
1302                 case 11:        /* get endpoint descriptor (ALWAYS STALLS) */
1303                         req.wValue = cpu_to_le16(USB_DT_ENDPOINT << 8);
1304                         /* endpoint == 0 */
1305                         len = sizeof(struct usb_interface_descriptor);
1306                         expected = EPIPE;
1307                         break;
1308                 /* NOTE: sometimes even a third fault in the queue! */
1309                 case 12:        /* get string 0 descriptor (MAY STALL) */
1310                         req.wValue = cpu_to_le16(USB_DT_STRING << 8);
1311                         /* string == 0, for language IDs */
1312                         len = sizeof(struct usb_interface_descriptor);
1313                         /* may succeed when > 4 languages */
1314                         expected = EREMOTEIO;   /* or EPIPE, if no strings */
1315                         break;
1316                 case 13:        /* short read, resembling case 10 */
1317                         req.wValue = cpu_to_le16((USB_DT_CONFIG << 8) | 0);
1318                         /* last data packet "should" be DATA1, not DATA0 */
1319                         if (udev->speed == USB_SPEED_SUPER)
1320                                 len = 1024 - 512;
1321                         else
1322                                 len = 1024 - udev->descriptor.bMaxPacketSize0;
1323                         expected = -EREMOTEIO;
1324                         break;
1325                 case 14:        /* short read; try to fill the last packet */
1326                         req.wValue = cpu_to_le16((USB_DT_DEVICE << 8) | 0);
1327                         /* device descriptor size == 18 bytes */
1328                         len = udev->descriptor.bMaxPacketSize0;
1329                         if (udev->speed == USB_SPEED_SUPER)
1330                                 len = 512;
1331                         switch (len) {
1332                         case 8:
1333                                 len = 24;
1334                                 break;
1335                         case 16:
1336                                 len = 32;
1337                                 break;
1338                         }
1339                         expected = -EREMOTEIO;
1340                         break;
1341                 case 15:
1342                         req.wValue = cpu_to_le16(USB_DT_BOS << 8);
1343                         if (udev->bos)
1344                                 len = le16_to_cpu(udev->bos->desc->wTotalLength);
1345                         else
1346                                 len = sizeof(struct usb_bos_descriptor);
1347                         if (le16_to_cpu(udev->descriptor.bcdUSB) < 0x0201)
1348                                 expected = -EPIPE;
1349                         break;
1350                 default:
1351                         ERROR(dev, "bogus number of ctrl queue testcases!\n");
1352                         context.status = -EINVAL;
1353                         goto cleanup;
1354                 }
1355                 req.wLength = cpu_to_le16(len);
1356                 urb[i] = u = simple_alloc_urb(udev, pipe, len, 0);
1357                 if (!u)
1358                         goto cleanup;
1359 
1360                 reqp = kmalloc(sizeof(*reqp), GFP_KERNEL);
1361                 if (!reqp)
1362                         goto cleanup;
1363                 reqp->setup = req;
1364                 reqp->number = i % NUM_SUBCASES;
1365                 reqp->expected = expected;
1366                 u->setup_packet = (char *) &reqp->setup;
1367 
1368                 u->context = &context;
1369                 u->complete = ctrl_complete;
1370         }
1371 
1372         /* queue the urbs */
1373         context.urb = urb;
1374         spin_lock_irq(&context.lock);
1375         for (i = 0; i < param->sglen; i++) {
1376                 context.status = usb_submit_urb(urb[i], GFP_ATOMIC);
1377                 if (context.status != 0) {
1378                         ERROR(dev, "can't submit urb[%d], status %d\n",
1379                                         i, context.status);
1380                         context.count = context.pending;
1381                         break;
1382                 }
1383                 context.pending++;
1384         }
1385         spin_unlock_irq(&context.lock);
1386 
1387         /* FIXME  set timer and time out; provide a disconnect hook */
1388 
1389         /* wait for the last one to complete */
1390         if (context.pending > 0)
1391                 wait_for_completion(&context.complete);
1392 
1393 cleanup:
1394         for (i = 0; i < param->sglen; i++) {
1395                 if (!urb[i])
1396                         continue;
1397                 urb[i]->dev = udev;
1398                 kfree(urb[i]->setup_packet);
1399                 simple_free_urb(urb[i]);
1400         }
1401         kfree(urb);
1402         return context.status;
1403 }
1404 #undef NUM_SUBCASES
1405 
1406 
1407 /*-------------------------------------------------------------------------*/
1408 
1409 static void unlink1_callback(struct urb *urb)
1410 {
1411         int     status = urb->status;
1412 
1413         /* we "know" -EPIPE (stall) never happens */
1414         if (!status)
1415                 status = usb_submit_urb(urb, GFP_ATOMIC);
1416         if (status) {
1417                 urb->status = status;
1418                 complete(urb->context);
1419         }
1420 }
1421 
1422 static int unlink1(struct usbtest_dev *dev, int pipe, int size, int async)
1423 {
1424         struct urb              *urb;
1425         struct completion       completion;
1426         int                     retval = 0;
1427 
1428         init_completion(&completion);
1429         urb = simple_alloc_urb(testdev_to_usbdev(dev), pipe, size, 0);
1430         if (!urb)
1431                 return -ENOMEM;
1432         urb->context = &completion;
1433         urb->complete = unlink1_callback;
1434 
1435         if (usb_pipeout(urb->pipe)) {
1436                 simple_fill_buf(urb);
1437                 urb->transfer_flags |= URB_ZERO_PACKET;
1438         }
1439 
1440         /* keep the endpoint busy.  there are lots of hc/hcd-internal
1441          * states, and testing should get to all of them over time.
1442          *
1443          * FIXME want additional tests for when endpoint is STALLing
1444          * due to errors, or is just NAKing requests.
1445          */
1446         retval = usb_submit_urb(urb, GFP_KERNEL);
1447         if (retval != 0) {
1448                 dev_err(&dev->intf->dev, "submit fail %d\n", retval);
1449                 return retval;
1450         }
1451 
1452         /* unlinking that should always work.  variable delay tests more
1453          * hcd states and code paths, even with little other system load.
1454          */
1455         msleep(jiffies % (2 * INTERRUPT_RATE));
1456         if (async) {
1457                 while (!completion_done(&completion)) {
1458                         retval = usb_unlink_urb(urb);
1459 
1460                         if (retval == 0 && usb_pipein(urb->pipe))
1461                                 retval = simple_check_buf(dev, urb);
1462 
1463                         switch (retval) {
1464                         case -EBUSY:
1465                         case -EIDRM:
1466                                 /* we can't unlink urbs while they're completing
1467                                  * or if they've completed, and we haven't
1468                                  * resubmitted. "normal" drivers would prevent
1469                                  * resubmission, but since we're testing unlink
1470                                  * paths, we can't.
1471                                  */
1472                                 ERROR(dev, "unlink retry\n");
1473                                 continue;
1474                         case 0:
1475                         case -EINPROGRESS:
1476                                 break;
1477 
1478                         default:
1479                                 dev_err(&dev->intf->dev,
1480                                         "unlink fail %d\n", retval);
1481                                 return retval;
1482                         }
1483 
1484                         break;
1485                 }
1486         } else
1487                 usb_kill_urb(urb);
1488 
1489         wait_for_completion(&completion);
1490         retval = urb->status;
1491         simple_free_urb(urb);
1492 
1493         if (async)
1494                 return (retval == -ECONNRESET) ? 0 : retval - 1000;
1495         else
1496                 return (retval == -ENOENT || retval == -EPERM) ?
1497                                 0 : retval - 2000;
1498 }
1499 
1500 static int unlink_simple(struct usbtest_dev *dev, int pipe, int len)
1501 {
1502         int                     retval = 0;
1503 
1504         /* test sync and async paths */
1505         retval = unlink1(dev, pipe, len, 1);
1506         if (!retval)
1507                 retval = unlink1(dev, pipe, len, 0);
1508         return retval;
1509 }
1510 
1511 /*-------------------------------------------------------------------------*/
1512 
1513 struct queued_ctx {
1514         struct completion       complete;
1515         atomic_t                pending;
1516         unsigned                num;
1517         int                     status;
1518         struct urb              **urbs;
1519 };
1520 
1521 static void unlink_queued_callback(struct urb *urb)
1522 {
1523         int                     status = urb->status;
1524         struct queued_ctx       *ctx = urb->context;
1525 
1526         if (ctx->status)
1527                 goto done;
1528         if (urb == ctx->urbs[ctx->num - 4] || urb == ctx->urbs[ctx->num - 2]) {
1529                 if (status == -ECONNRESET)
1530                         goto done;
1531                 /* What error should we report if the URB completed normally? */
1532         }
1533         if (status != 0)
1534                 ctx->status = status;
1535 
1536  done:
1537         if (atomic_dec_and_test(&ctx->pending))
1538                 complete(&ctx->complete);
1539 }
1540 
1541 static int unlink_queued(struct usbtest_dev *dev, int pipe, unsigned num,
1542                 unsigned size)
1543 {
1544         struct queued_ctx       ctx;
1545         struct usb_device       *udev = testdev_to_usbdev(dev);
1546         void                    *buf;
1547         dma_addr_t              buf_dma;
1548         int                     i;
1549         int                     retval = -ENOMEM;
1550 
1551         init_completion(&ctx.complete);
1552         atomic_set(&ctx.pending, 1);    /* One more than the actual value */
1553         ctx.num = num;
1554         ctx.status = 0;
1555 
1556         buf = usb_alloc_coherent(udev, size, GFP_KERNEL, &buf_dma);
1557         if (!buf)
1558                 return retval;
1559         memset(buf, 0, size);
1560 
1561         /* Allocate and init the urbs we'll queue */
1562         ctx.urbs = kcalloc(num, sizeof(struct urb *), GFP_KERNEL);
1563         if (!ctx.urbs)
1564                 goto free_buf;
1565         for (i = 0; i < num; i++) {
1566                 ctx.urbs[i] = usb_alloc_urb(0, GFP_KERNEL);
1567                 if (!ctx.urbs[i])
1568                         goto free_urbs;
1569                 usb_fill_bulk_urb(ctx.urbs[i], udev, pipe, buf, size,
1570                                 unlink_queued_callback, &ctx);
1571                 ctx.urbs[i]->transfer_dma = buf_dma;
1572                 ctx.urbs[i]->transfer_flags = URB_NO_TRANSFER_DMA_MAP;
1573 
1574                 if (usb_pipeout(ctx.urbs[i]->pipe)) {
1575                         simple_fill_buf(ctx.urbs[i]);
1576                         ctx.urbs[i]->transfer_flags |= URB_ZERO_PACKET;
1577                 }
1578         }
1579 
1580         /* Submit all the URBs and then unlink URBs num - 4 and num - 2. */
1581         for (i = 0; i < num; i++) {
1582                 atomic_inc(&ctx.pending);
1583                 retval = usb_submit_urb(ctx.urbs[i], GFP_KERNEL);
1584                 if (retval != 0) {
1585                         dev_err(&dev->intf->dev, "submit urbs[%d] fail %d\n",
1586                                         i, retval);
1587                         atomic_dec(&ctx.pending);
1588                         ctx.status = retval;
1589                         break;
1590                 }
1591         }
1592         if (i == num) {
1593                 usb_unlink_urb(ctx.urbs[num - 4]);
1594                 usb_unlink_urb(ctx.urbs[num - 2]);
1595         } else {
1596                 while (--i >= 0)
1597                         usb_unlink_urb(ctx.urbs[i]);
1598         }
1599 
1600         if (atomic_dec_and_test(&ctx.pending))          /* The extra count */
1601                 complete(&ctx.complete);
1602         wait_for_completion(&ctx.complete);
1603         retval = ctx.status;
1604 
1605  free_urbs:
1606         for (i = 0; i < num; i++)
1607                 usb_free_urb(ctx.urbs[i]);
1608         kfree(ctx.urbs);
1609  free_buf:
1610         usb_free_coherent(udev, size, buf, buf_dma);
1611         return retval;
1612 }
1613 
1614 /*-------------------------------------------------------------------------*/
1615 
1616 static int verify_not_halted(struct usbtest_dev *tdev, int ep, struct urb *urb)
1617 {
1618         int     retval;
1619         u16     status;
1620 
1621         /* shouldn't look or act halted */
1622         retval = usb_get_status(urb->dev, USB_RECIP_ENDPOINT, ep, &status);
1623         if (retval < 0) {
1624                 ERROR(tdev, "ep %02x couldn't get no-halt status, %d\n",
1625                                 ep, retval);
1626                 return retval;
1627         }
1628         if (status != 0) {
1629                 ERROR(tdev, "ep %02x bogus status: %04x != 0\n", ep, status);
1630                 return -EINVAL;
1631         }
1632         retval = simple_io(tdev, urb, 1, 0, 0, __func__);
1633         if (retval != 0)
1634                 return -EINVAL;
1635         return 0;
1636 }
1637 
1638 static int verify_halted(struct usbtest_dev *tdev, int ep, struct urb *urb)
1639 {
1640         int     retval;
1641         u16     status;
1642 
1643         /* should look and act halted */
1644         retval = usb_get_status(urb->dev, USB_RECIP_ENDPOINT, ep, &status);
1645         if (retval < 0) {
1646                 ERROR(tdev, "ep %02x couldn't get halt status, %d\n",
1647                                 ep, retval);
1648                 return retval;
1649         }
1650         if (status != 1) {
1651                 ERROR(tdev, "ep %02x bogus status: %04x != 1\n", ep, status);
1652                 return -EINVAL;
1653         }
1654         retval = simple_io(tdev, urb, 1, 0, -EPIPE, __func__);
1655         if (retval != -EPIPE)
1656                 return -EINVAL;
1657         retval = simple_io(tdev, urb, 1, 0, -EPIPE, "verify_still_halted");
1658         if (retval != -EPIPE)
1659                 return -EINVAL;
1660         return 0;
1661 }
1662 
1663 static int test_halt(struct usbtest_dev *tdev, int ep, struct urb *urb)
1664 {
1665         int     retval;
1666 
1667         /* shouldn't look or act halted now */
1668         retval = verify_not_halted(tdev, ep, urb);
1669         if (retval < 0)
1670                 return retval;
1671 
1672         /* set halt (protocol test only), verify it worked */
1673         retval = usb_control_msg(urb->dev, usb_sndctrlpipe(urb->dev, 0),
1674                         USB_REQ_SET_FEATURE, USB_RECIP_ENDPOINT,
1675                         USB_ENDPOINT_HALT, ep,
1676                         NULL, 0, USB_CTRL_SET_TIMEOUT);
1677         if (retval < 0) {
1678                 ERROR(tdev, "ep %02x couldn't set halt, %d\n", ep, retval);
1679                 return retval;
1680         }
1681         retval = verify_halted(tdev, ep, urb);
1682         if (retval < 0) {
1683                 int ret;
1684 
1685                 /* clear halt anyways, else further tests will fail */
1686                 ret = usb_clear_halt(urb->dev, urb->pipe);
1687                 if (ret)
1688                         ERROR(tdev, "ep %02x couldn't clear halt, %d\n",
1689                               ep, ret);
1690 
1691                 return retval;
1692         }
1693 
1694         /* clear halt (tests API + protocol), verify it worked */
1695         retval = usb_clear_halt(urb->dev, urb->pipe);
1696         if (retval < 0) {
1697                 ERROR(tdev, "ep %02x couldn't clear halt, %d\n", ep, retval);
1698                 return retval;
1699         }
1700         retval = verify_not_halted(tdev, ep, urb);
1701         if (retval < 0)
1702                 return retval;
1703 
1704         /* NOTE:  could also verify SET_INTERFACE clear halts ... */
1705 
1706         return 0;
1707 }
1708 
1709 static int halt_simple(struct usbtest_dev *dev)
1710 {
1711         int                     ep;
1712         int                     retval = 0;
1713         struct urb              *urb;
1714         struct usb_device       *udev = testdev_to_usbdev(dev);
1715 
1716         if (udev->speed == USB_SPEED_SUPER)
1717                 urb = simple_alloc_urb(udev, 0, 1024, 0);
1718         else
1719                 urb = simple_alloc_urb(udev, 0, 512, 0);
1720         if (urb == NULL)
1721                 return -ENOMEM;
1722 
1723         if (dev->in_pipe) {
1724                 ep = usb_pipeendpoint(dev->in_pipe) | USB_DIR_IN;
1725                 urb->pipe = dev->in_pipe;
1726                 retval = test_halt(dev, ep, urb);
1727                 if (retval < 0)
1728                         goto done;
1729         }
1730 
1731         if (dev->out_pipe) {
1732                 ep = usb_pipeendpoint(dev->out_pipe);
1733                 urb->pipe = dev->out_pipe;
1734                 retval = test_halt(dev, ep, urb);
1735         }
1736 done:
1737         simple_free_urb(urb);
1738         return retval;
1739 }
1740 
1741 /*-------------------------------------------------------------------------*/
1742 
1743 /* Control OUT tests use the vendor control requests from Intel's
1744  * USB 2.0 compliance test device:  write a buffer, read it back.
1745  *
1746  * Intel's spec only _requires_ that it work for one packet, which
1747  * is pretty weak.   Some HCDs place limits here; most devices will
1748  * need to be able to handle more than one OUT data packet.  We'll
1749  * try whatever we're told to try.
1750  */
1751 static int ctrl_out(struct usbtest_dev *dev,
1752                 unsigned count, unsigned length, unsigned vary, unsigned offset)
1753 {
1754         unsigned                i, j, len;
1755         int                     retval;
1756         u8                      *buf;
1757         char                    *what = "?";
1758         struct usb_device       *udev;
1759 
1760         if (length < 1 || length > 0xffff || vary >= length)
1761                 return -EINVAL;
1762 
1763         buf = kmalloc(length + offset, GFP_KERNEL);
1764         if (!buf)
1765                 return -ENOMEM;
1766 
1767         buf += offset;
1768         udev = testdev_to_usbdev(dev);
1769         len = length;
1770         retval = 0;
1771 
1772         /* NOTE:  hardware might well act differently if we pushed it
1773          * with lots back-to-back queued requests.
1774          */
1775         for (i = 0; i < count; i++) {
1776                 /* write patterned data */
1777                 for (j = 0; j < len; j++)
1778                         buf[j] = (u8)(i + j);
1779                 retval = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
1780                                 0x5b, USB_DIR_OUT|USB_TYPE_VENDOR,
1781                                 0, 0, buf, len, USB_CTRL_SET_TIMEOUT);
1782                 if (retval != len) {
1783                         what = "write";
1784                         if (retval >= 0) {
1785                                 ERROR(dev, "ctrl_out, wlen %d (expected %d)\n",
1786                                                 retval, len);
1787                                 retval = -EBADMSG;
1788                         }
1789                         break;
1790                 }
1791 
1792                 /* read it back -- assuming nothing intervened!!  */
1793                 retval = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
1794                                 0x5c, USB_DIR_IN|USB_TYPE_VENDOR,
1795                                 0, 0, buf, len, USB_CTRL_GET_TIMEOUT);
1796                 if (retval != len) {
1797                         what = "read";
1798                         if (retval >= 0) {
1799                                 ERROR(dev, "ctrl_out, rlen %d (expected %d)\n",
1800                                                 retval, len);
1801                                 retval = -EBADMSG;
1802                         }
1803                         break;
1804                 }
1805 
1806                 /* fail if we can't verify */
1807                 for (j = 0; j < len; j++) {
1808                         if (buf[j] != (u8)(i + j)) {
1809                                 ERROR(dev, "ctrl_out, byte %d is %d not %d\n",
1810                                         j, buf[j], (u8)(i + j));
1811                                 retval = -EBADMSG;
1812                                 break;
1813                         }
1814                 }
1815                 if (retval < 0) {
1816                         what = "verify";
1817                         break;
1818                 }
1819 
1820                 len += vary;
1821 
1822                 /* [real world] the "zero bytes IN" case isn't really used.
1823                  * hardware can easily trip up in this weird case, since its
1824                  * status stage is IN, not OUT like other ep0in transfers.
1825                  */
1826                 if (len > length)
1827                         len = realworld ? 1 : 0;
1828         }
1829 
1830         if (retval < 0)
1831                 ERROR(dev, "ctrl_out %s failed, code %d, count %d\n",
1832                         what, retval, i);
1833 
1834         kfree(buf - offset);
1835         return retval;
1836 }
1837 
1838 /*-------------------------------------------------------------------------*/
1839 
1840 /* ISO/BULK tests ... mimics common usage
1841  *  - buffer length is split into N packets (mostly maxpacket sized)
1842  *  - multi-buffers according to sglen
1843  */
1844 
1845 struct transfer_context {
1846         unsigned                count;
1847         unsigned                pending;
1848         spinlock_t              lock;
1849         struct completion       done;
1850         int                     submit_error;
1851         unsigned long           errors;
1852         unsigned long           packet_count;
1853         struct usbtest_dev      *dev;
1854         bool                    is_iso;
1855 };
1856 
1857 static void complicated_callback(struct urb *urb)
1858 {
1859         struct transfer_context *ctx = urb->context;
1860 
1861         spin_lock(&ctx->lock);
1862         ctx->count--;
1863 
1864         ctx->packet_count += urb->number_of_packets;
1865         if (urb->error_count > 0)
1866                 ctx->errors += urb->error_count;
1867         else if (urb->status != 0)
1868                 ctx->errors += (ctx->is_iso ? urb->number_of_packets : 1);
1869         else if (urb->actual_length != urb->transfer_buffer_length)
1870                 ctx->errors++;
1871         else if (check_guard_bytes(ctx->dev, urb) != 0)
1872                 ctx->errors++;
1873 
1874         if (urb->status == 0 && ctx->count > (ctx->pending - 1)
1875                         && !ctx->submit_error) {
1876                 int status = usb_submit_urb(urb, GFP_ATOMIC);
1877                 switch (status) {
1878                 case 0:
1879                         goto done;
1880                 default:
1881                         dev_err(&ctx->dev->intf->dev,
1882                                         "resubmit err %d\n",
1883                                         status);
1884                         /* FALLTHROUGH */
1885                 case -ENODEV:                   /* disconnected */
1886                 case -ESHUTDOWN:                /* endpoint disabled */
1887                         ctx->submit_error = 1;
1888                         break;
1889                 }
1890         }
1891 
1892         ctx->pending--;
1893         if (ctx->pending == 0) {
1894                 if (ctx->errors)
1895                         dev_err(&ctx->dev->intf->dev,
1896                                 "during the test, %lu errors out of %lu\n",
1897                                 ctx->errors, ctx->packet_count);
1898                 complete(&ctx->done);
1899         }
1900 done:
1901         spin_unlock(&ctx->lock);
1902 }
1903 
1904 static struct urb *iso_alloc_urb(
1905         struct usb_device       *udev,
1906         int                     pipe,
1907         struct usb_endpoint_descriptor  *desc,
1908         long                    bytes,
1909         unsigned offset
1910 )
1911 {
1912         struct urb              *urb;
1913         unsigned                i, maxp, packets;
1914 
1915         if (bytes < 0 || !desc)
1916                 return NULL;
1917         maxp = 0x7ff & usb_endpoint_maxp(desc);
1918         maxp *= 1 + (0x3 & (usb_endpoint_maxp(desc) >> 11));
1919         packets = DIV_ROUND_UP(bytes, maxp);
1920 
1921         urb = usb_alloc_urb(packets, GFP_KERNEL);
1922         if (!urb)
1923                 return urb;
1924         urb->dev = udev;
1925         urb->pipe = pipe;
1926 
1927         urb->number_of_packets = packets;
1928         urb->transfer_buffer_length = bytes;
1929         urb->transfer_buffer = usb_alloc_coherent(udev, bytes + offset,
1930                                                         GFP_KERNEL,
1931                                                         &urb->transfer_dma);
1932         if (!urb->transfer_buffer) {
1933                 usb_free_urb(urb);
1934                 return NULL;
1935         }
1936         if (offset) {
1937                 memset(urb->transfer_buffer, GUARD_BYTE, offset);
1938                 urb->transfer_buffer += offset;
1939                 urb->transfer_dma += offset;
1940         }
1941         /* For inbound transfers use guard byte so that test fails if
1942                 data not correctly copied */
1943         memset(urb->transfer_buffer,
1944                         usb_pipein(urb->pipe) ? GUARD_BYTE : 0,
1945                         bytes);
1946 
1947         for (i = 0; i < packets; i++) {
1948                 /* here, only the last packet will be short */
1949                 urb->iso_frame_desc[i].length = min((unsigned) bytes, maxp);
1950                 bytes -= urb->iso_frame_desc[i].length;
1951 
1952                 urb->iso_frame_desc[i].offset = maxp * i;
1953         }
1954 
1955         urb->complete = complicated_callback;
1956         /* urb->context = SET BY CALLER */
1957         urb->interval = 1 << (desc->bInterval - 1);
1958         urb->transfer_flags = URB_ISO_ASAP | URB_NO_TRANSFER_DMA_MAP;
1959         return urb;
1960 }
1961 
1962 static int
1963 test_queue(struct usbtest_dev *dev, struct usbtest_param_32 *param,
1964                 int pipe, struct usb_endpoint_descriptor *desc, unsigned offset)
1965 {
1966         struct transfer_context context;
1967         struct usb_device       *udev;
1968         unsigned                i;
1969         unsigned long           packets = 0;
1970         int                     status = 0;
1971         struct urb              *urbs[param->sglen];
1972 
1973         memset(&context, 0, sizeof(context));
1974         context.count = param->iterations * param->sglen;
1975         context.dev = dev;
1976         context.is_iso = !!desc;
1977         init_completion(&context.done);
1978         spin_lock_init(&context.lock);
1979 
1980         udev = testdev_to_usbdev(dev);
1981 
1982         for (i = 0; i < param->sglen; i++) {
1983                 if (context.is_iso)
1984                         urbs[i] = iso_alloc_urb(udev, pipe, desc,
1985                                         param->length, offset);
1986                 else
1987                         urbs[i] = complicated_alloc_urb(udev, pipe,
1988                                         param->length, 0);
1989 
1990                 if (!urbs[i]) {
1991                         status = -ENOMEM;
1992                         goto fail;
1993                 }
1994                 packets += urbs[i]->number_of_packets;
1995                 urbs[i]->context = &context;
1996         }
1997         packets *= param->iterations;
1998 
1999         if (context.is_iso) {
2000                 dev_info(&dev->intf->dev,
2001                         "iso period %d %sframes, wMaxPacket %d, transactions: %d\n",
2002                         1 << (desc->bInterval - 1),
2003                         (udev->speed == USB_SPEED_HIGH) ? "micro" : "",
2004                         usb_endpoint_maxp(desc) & 0x7ff,
2005                         1 + (0x3 & (usb_endpoint_maxp(desc) >> 11)));
2006 
2007                 dev_info(&dev->intf->dev,
2008                         "total %lu msec (%lu packets)\n",
2009                         (packets * (1 << (desc->bInterval - 1)))
2010                                 / ((udev->speed == USB_SPEED_HIGH) ? 8 : 1),
2011                         packets);
2012         }
2013 
2014         spin_lock_irq(&context.lock);
2015         for (i = 0; i < param->sglen; i++) {
2016                 ++context.pending;
2017                 status = usb_submit_urb(urbs[i], GFP_ATOMIC);
2018                 if (status < 0) {
2019                         ERROR(dev, "submit iso[%d], error %d\n", i, status);
2020                         if (i == 0) {
2021                                 spin_unlock_irq(&context.lock);
2022                                 goto fail;
2023                         }
2024 
2025                         simple_free_urb(urbs[i]);
2026                         urbs[i] = NULL;
2027                         context.pending--;
2028                         context.submit_error = 1;
2029                         break;
2030                 }
2031         }
2032         spin_unlock_irq(&context.lock);
2033 
2034         wait_for_completion(&context.done);
2035 
2036         for (i = 0; i < param->sglen; i++) {
2037                 if (urbs[i])
2038                         simple_free_urb(urbs[i]);
2039         }
2040         /*
2041          * Isochronous transfers are expected to fail sometimes.  As an
2042          * arbitrary limit, we will report an error if any submissions
2043          * fail or if the transfer failure rate is > 10%.
2044          */
2045         if (status != 0)
2046                 ;
2047         else if (context.submit_error)
2048                 status = -EACCES;
2049         else if (context.errors >
2050                         (context.is_iso ? context.packet_count / 10 : 0))
2051                 status = -EIO;
2052         return status;
2053 
2054 fail:
2055         for (i = 0; i < param->sglen; i++) {
2056                 if (urbs[i])
2057                         simple_free_urb(urbs[i]);
2058         }
2059         return status;
2060 }
2061 
2062 static int test_unaligned_bulk(
2063         struct usbtest_dev *tdev,
2064         int pipe,
2065         unsigned length,
2066         int iterations,
2067         unsigned transfer_flags,
2068         const char *label)
2069 {
2070         int retval;
2071         struct urb *urb = usbtest_alloc_urb(testdev_to_usbdev(tdev),
2072                         pipe, length, transfer_flags, 1, 0, simple_callback);
2073 
2074         if (!urb)
2075                 return -ENOMEM;
2076 
2077         retval = simple_io(tdev, urb, iterations, 0, 0, label);
2078         simple_free_urb(urb);
2079         return retval;
2080 }
2081 
2082 /* Run tests. */
2083 static int
2084 usbtest_do_ioctl(struct usb_interface *intf, struct usbtest_param_32 *param)
2085 {
2086         struct usbtest_dev      *dev = usb_get_intfdata(intf);
2087         struct usb_device       *udev = testdev_to_usbdev(dev);
2088         struct urb              *urb;
2089         struct scatterlist      *sg;
2090         struct usb_sg_request   req;
2091         unsigned                i;
2092         int     retval = -EOPNOTSUPP;
2093 
2094         if (param->iterations <= 0)
2095                 return -EINVAL;
2096         /*
2097          * Just a bunch of test cases that every HCD is expected to handle.
2098          *
2099          * Some may need specific firmware, though it'd be good to have
2100          * one firmware image to handle all the test cases.
2101          *
2102          * FIXME add more tests!  cancel requests, verify the data, control
2103          * queueing, concurrent read+write threads, and so on.
2104          */
2105         switch (param->test_num) {
2106 
2107         case 0:
2108                 dev_info(&intf->dev, "TEST 0:  NOP\n");
2109                 retval = 0;
2110                 break;
2111 
2112         /* Simple non-queued bulk I/O tests */
2113         case 1:
2114                 if (dev->out_pipe == 0)
2115                         break;
2116                 dev_info(&intf->dev,
2117                                 "TEST 1:  write %d bytes %u times\n",
2118                                 param->length, param->iterations);
2119                 urb = simple_alloc_urb(udev, dev->out_pipe, param->length, 0);
2120                 if (!urb) {
2121                         retval = -ENOMEM;
2122                         break;
2123                 }
2124                 /* FIRMWARE:  bulk sink (maybe accepts short writes) */
2125                 retval = simple_io(dev, urb, param->iterations, 0, 0, "test1");
2126                 simple_free_urb(urb);
2127                 break;
2128         case 2:
2129                 if (dev->in_pipe == 0)
2130                         break;
2131                 dev_info(&intf->dev,
2132                                 "TEST 2:  read %d bytes %u times\n",
2133                                 param->length, param->iterations);
2134                 urb = simple_alloc_urb(udev, dev->in_pipe, param->length, 0);
2135                 if (!urb) {
2136                         retval = -ENOMEM;
2137                         break;
2138                 }
2139                 /* FIRMWARE:  bulk source (maybe generates short writes) */
2140                 retval = simple_io(dev, urb, param->iterations, 0, 0, "test2");
2141                 simple_free_urb(urb);
2142                 break;
2143         case 3:
2144                 if (dev->out_pipe == 0 || param->vary == 0)
2145                         break;
2146                 dev_info(&intf->dev,
2147                                 "TEST 3:  write/%d 0..%d bytes %u times\n",
2148                                 param->vary, param->length, param->iterations);
2149                 urb = simple_alloc_urb(udev, dev->out_pipe, param->length, 0);
2150                 if (!urb) {
2151                         retval = -ENOMEM;
2152                         break;
2153                 }
2154                 /* FIRMWARE:  bulk sink (maybe accepts short writes) */
2155                 retval = simple_io(dev, urb, param->iterations, param->vary,
2156                                         0, "test3");
2157                 simple_free_urb(urb);
2158                 break;
2159         case 4:
2160                 if (dev->in_pipe == 0 || param->vary == 0)
2161                         break;
2162                 dev_info(&intf->dev,
2163                                 "TEST 4:  read/%d 0..%d bytes %u times\n",
2164                                 param->vary, param->length, param->iterations);
2165                 urb = simple_alloc_urb(udev, dev->in_pipe, param->length, 0);
2166                 if (!urb) {
2167                         retval = -ENOMEM;
2168                         break;
2169                 }
2170                 /* FIRMWARE:  bulk source (maybe generates short writes) */
2171                 retval = simple_io(dev, urb, param->iterations, param->vary,
2172                                         0, "test4");
2173                 simple_free_urb(urb);
2174                 break;
2175 
2176         /* Queued bulk I/O tests */
2177         case 5:
2178                 if (dev->out_pipe == 0 || param->sglen == 0)
2179                         break;
2180                 dev_info(&intf->dev,
2181                         "TEST 5:  write %d sglists %d entries of %d bytes\n",
2182                                 param->iterations,
2183                                 param->sglen, param->length);
2184                 sg = alloc_sglist(param->sglen, param->length,
2185                                 0, dev, dev->out_pipe);
2186                 if (!sg) {
2187                         retval = -ENOMEM;
2188                         break;
2189                 }
2190                 /* FIRMWARE:  bulk sink (maybe accepts short writes) */
2191                 retval = perform_sglist(dev, param->iterations, dev->out_pipe,
2192                                 &req, sg, param->sglen);
2193                 free_sglist(sg, param->sglen);
2194                 break;
2195 
2196         case 6:
2197                 if (dev->in_pipe == 0 || param->sglen == 0)
2198                         break;
2199                 dev_info(&intf->dev,
2200                         "TEST 6:  read %d sglists %d entries of %d bytes\n",
2201                                 param->iterations,
2202                                 param->sglen, param->length);
2203                 sg = alloc_sglist(param->sglen, param->length,
2204                                 0, dev, dev->in_pipe);
2205                 if (!sg) {
2206                         retval = -ENOMEM;
2207                         break;
2208                 }
2209                 /* FIRMWARE:  bulk source (maybe generates short writes) */
2210                 retval = perform_sglist(dev, param->iterations, dev->in_pipe,
2211                                 &req, sg, param->sglen);
2212                 free_sglist(sg, param->sglen);
2213                 break;
2214         case 7:
2215                 if (dev->out_pipe == 0 || param->sglen == 0 || param->vary == 0)
2216                         break;
2217                 dev_info(&intf->dev,
2218                         "TEST 7:  write/%d %d sglists %d entries 0..%d bytes\n",
2219                                 param->vary, param->iterations,
2220                                 param->sglen, param->length);
2221                 sg = alloc_sglist(param->sglen, param->length,
2222                                 param->vary, dev, dev->out_pipe);
2223                 if (!sg) {
2224                         retval = -ENOMEM;
2225                         break;
2226                 }
2227                 /* FIRMWARE:  bulk sink (maybe accepts short writes) */
2228                 retval = perform_sglist(dev, param->iterations, dev->out_pipe,
2229                                 &req, sg, param->sglen);
2230                 free_sglist(sg, param->sglen);
2231                 break;
2232         case 8:
2233                 if (dev->in_pipe == 0 || param->sglen == 0 || param->vary == 0)
2234                         break;
2235                 dev_info(&intf->dev,
2236                         "TEST 8:  read/%d %d sglists %d entries 0..%d bytes\n",
2237                                 param->vary, param->iterations,
2238                                 param->sglen, param->length);
2239                 sg = alloc_sglist(param->sglen, param->length,
2240                                 param->vary, dev, dev->in_pipe);
2241                 if (!sg) {
2242                         retval = -ENOMEM;
2243                         break;
2244                 }
2245                 /* FIRMWARE:  bulk source (maybe generates short writes) */
2246                 retval = perform_sglist(dev, param->iterations, dev->in_pipe,
2247                                 &req, sg, param->sglen);
2248                 free_sglist(sg, param->sglen);
2249                 break;
2250 
2251         /* non-queued sanity tests for control (chapter 9 subset) */
2252         case 9:
2253                 retval = 0;
2254                 dev_info(&intf->dev,
2255                         "TEST 9:  ch9 (subset) control tests, %d times\n",
2256                                 param->iterations);
2257                 for (i = param->iterations; retval == 0 && i--; /* NOP */)
2258                         retval = ch9_postconfig(dev);
2259                 if (retval)
2260                         dev_err(&intf->dev, "ch9 subset failed, "
2261                                         "iterations left %d\n", i);
2262                 break;
2263 
2264         /* queued control messaging */
2265         case 10:
2266                 retval = 0;
2267                 dev_info(&intf->dev,
2268                                 "TEST 10:  queue %d control calls, %d times\n",
2269                                 param->sglen,
2270                                 param->iterations);
2271                 retval = test_ctrl_queue(dev, param);
2272                 break;
2273 
2274         /* simple non-queued unlinks (ring with one urb) */
2275         case 11:
2276                 if (dev->in_pipe == 0 || !param->length)
2277                         break;
2278                 retval = 0;
2279                 dev_info(&intf->dev, "TEST 11:  unlink %d reads of %d\n",
2280                                 param->iterations, param->length);
2281                 for (i = param->iterations; retval == 0 && i--; /* NOP */)
2282                         retval = unlink_simple(dev, dev->in_pipe,
2283                                                 param->length);
2284                 if (retval)
2285                         dev_err(&intf->dev, "unlink reads failed %d, "
2286                                 "iterations left %d\n", retval, i);
2287                 break;
2288         case 12:
2289                 if (dev->out_pipe == 0 || !param->length)
2290                         break;
2291                 retval = 0;
2292                 dev_info(&intf->dev, "TEST 12:  unlink %d writes of %d\n",
2293                                 param->iterations, param->length);
2294                 for (i = param->iterations; retval == 0 && i--; /* NOP */)
2295                         retval = unlink_simple(dev, dev->out_pipe,
2296                                                 param->length);
2297                 if (retval)
2298                         dev_err(&intf->dev, "unlink writes failed %d, "
2299                                 "iterations left %d\n", retval, i);
2300                 break;
2301 
2302         /* ep halt tests */
2303         case 13:
2304                 if (dev->out_pipe == 0 && dev->in_pipe == 0)
2305                         break;
2306                 retval = 0;
2307                 dev_info(&intf->dev, "TEST 13:  set/clear %d halts\n",
2308                                 param->iterations);
2309                 for (i = param->iterations; retval == 0 && i--; /* NOP */)
2310                         retval = halt_simple(dev);
2311 
2312                 if (retval)
2313                         ERROR(dev, "halts failed, iterations left %d\n", i);
2314                 break;
2315 
2316         /* control write tests */
2317         case 14:
2318                 if (!dev->info->ctrl_out)
2319                         break;
2320                 dev_info(&intf->dev, "TEST 14:  %d ep0out, %d..%d vary %d\n",
2321                                 param->iterations,
2322                                 realworld ? 1 : 0, param->length,
2323                                 param->vary);
2324                 retval = ctrl_out(dev, param->iterations,
2325                                 param->length, param->vary, 0);
2326                 break;
2327 
2328         /* iso write tests */
2329         case 15:
2330                 if (dev->out_iso_pipe == 0 || param->sglen == 0)
2331                         break;
2332                 dev_info(&intf->dev,
2333                         "TEST 15:  write %d iso, %d entries of %d bytes\n",
2334                                 param->iterations,
2335                                 param->sglen, param->length);
2336                 /* FIRMWARE:  iso sink */
2337                 retval = test_queue(dev, param,
2338                                 dev->out_iso_pipe, dev->iso_out, 0);
2339                 break;
2340 
2341         /* iso read tests */
2342         case 16:
2343                 if (dev->in_iso_pipe == 0 || param->sglen == 0)
2344                         break;
2345                 dev_info(&intf->dev,
2346                         "TEST 16:  read %d iso, %d entries of %d bytes\n",
2347                                 param->iterations,
2348                                 param->sglen, param->length);
2349                 /* FIRMWARE:  iso source */
2350                 retval = test_queue(dev, param,
2351                                 dev->in_iso_pipe, dev->iso_in, 0);
2352                 break;
2353 
2354         /* FIXME scatterlist cancel (needs helper thread) */
2355 
2356         /* Tests for bulk I/O using DMA mapping by core and odd address */
2357         case 17:
2358                 if (dev->out_pipe == 0)
2359                         break;
2360                 dev_info(&intf->dev,
2361                         "TEST 17:  write odd addr %d bytes %u times core map\n",
2362                         param->length, param->iterations);
2363 
2364                 retval = test_unaligned_bulk(
2365                                 dev, dev->out_pipe,
2366                                 param->length, param->iterations,
2367                                 0, "test17");
2368                 break;
2369 
2370         case 18:
2371                 if (dev->in_pipe == 0)
2372                         break;
2373                 dev_info(&intf->dev,
2374                         "TEST 18:  read odd addr %d bytes %u times core map\n",
2375                         param->length, param->iterations);
2376 
2377                 retval = test_unaligned_bulk(
2378                                 dev, dev->in_pipe,
2379                                 param->length, param->iterations,
2380                                 0, "test18");
2381                 break;
2382 
2383         /* Tests for bulk I/O using premapped coherent buffer and odd address */
2384         case 19:
2385                 if (dev->out_pipe == 0)
2386                         break;
2387                 dev_info(&intf->dev,
2388                         "TEST 19:  write odd addr %d bytes %u times premapped\n",
2389                         param->length, param->iterations);
2390 
2391                 retval = test_unaligned_bulk(
2392                                 dev, dev->out_pipe,
2393                                 param->length, param->iterations,
2394                                 URB_NO_TRANSFER_DMA_MAP, "test19");
2395                 break;
2396 
2397         case 20:
2398                 if (dev->in_pipe == 0)
2399                         break;
2400                 dev_info(&intf->dev,
2401                         "TEST 20:  read odd addr %d bytes %u times premapped\n",
2402                         param->length, param->iterations);
2403 
2404                 retval = test_unaligned_bulk(
2405                                 dev, dev->in_pipe,
2406                                 param->length, param->iterations,
2407                                 URB_NO_TRANSFER_DMA_MAP, "test20");
2408                 break;
2409 
2410         /* control write tests with unaligned buffer */
2411         case 21:
2412                 if (!dev->info->ctrl_out)
2413                         break;
2414                 dev_info(&intf->dev,
2415                                 "TEST 21:  %d ep0out odd addr, %d..%d vary %d\n",
2416                                 param->iterations,
2417                                 realworld ? 1 : 0, param->length,
2418                                 param->vary);
2419                 retval = ctrl_out(dev, param->iterations,
2420                                 param->length, param->vary, 1);
2421                 break;
2422 
2423         /* unaligned iso tests */
2424         case 22:
2425                 if (dev->out_iso_pipe == 0 || param->sglen == 0)
2426                         break;
2427                 dev_info(&intf->dev,
2428                         "TEST 22:  write %d iso odd, %d entries of %d bytes\n",
2429                                 param->iterations,
2430                                 param->sglen, param->length);
2431                 retval = test_queue(dev, param,
2432                                 dev->out_iso_pipe, dev->iso_out, 1);
2433                 break;
2434 
2435         case 23:
2436                 if (dev->in_iso_pipe == 0 || param->sglen == 0)
2437                         break;
2438                 dev_info(&intf->dev,
2439                         "TEST 23:  read %d iso odd, %d entries of %d bytes\n",
2440                                 param->iterations,
2441                                 param->sglen, param->length);
2442                 retval = test_queue(dev, param,
2443                                 dev->in_iso_pipe, dev->iso_in, 1);
2444                 break;
2445 
2446         /* unlink URBs from a bulk-OUT queue */
2447         case 24:
2448                 if (dev->out_pipe == 0 || !param->length || param->sglen < 4)
2449                         break;
2450                 retval = 0;
2451                 dev_info(&intf->dev, "TEST 24:  unlink from %d queues of "
2452                                 "%d %d-byte writes\n",
2453                                 param->iterations, param->sglen, param->length);
2454                 for (i = param->iterations; retval == 0 && i > 0; --i) {
2455                         retval = unlink_queued(dev, dev->out_pipe,
2456                                                 param->sglen, param->length);
2457                         if (retval) {
2458                                 dev_err(&intf->dev,
2459                                         "unlink queued writes failed %d, "
2460                                         "iterations left %d\n", retval, i);
2461                                 break;
2462                         }
2463                 }
2464                 break;
2465 
2466         /* Simple non-queued interrupt I/O tests */
2467         case 25:
2468                 if (dev->out_int_pipe == 0)
2469                         break;
2470                 dev_info(&intf->dev,
2471                                 "TEST 25: write %d bytes %u times\n",
2472                                 param->length, param->iterations);
2473                 urb = simple_alloc_urb(udev, dev->out_int_pipe, param->length,
2474                                 dev->int_out->bInterval);
2475                 if (!urb) {
2476                         retval = -ENOMEM;
2477                         break;
2478                 }
2479                 /* FIRMWARE: interrupt sink (maybe accepts short writes) */
2480                 retval = simple_io(dev, urb, param->iterations, 0, 0, "test25");
2481                 simple_free_urb(urb);
2482                 break;
2483         case 26:
2484                 if (dev->in_int_pipe == 0)
2485                         break;
2486                 dev_info(&intf->dev,
2487                                 "TEST 26: read %d bytes %u times\n",
2488                                 param->length, param->iterations);
2489                 urb = simple_alloc_urb(udev, dev->in_int_pipe, param->length,
2490                                 dev->int_in->bInterval);
2491                 if (!urb) {
2492                         retval = -ENOMEM;
2493                         break;
2494                 }
2495                 /* FIRMWARE: interrupt source (maybe generates short writes) */
2496                 retval = simple_io(dev, urb, param->iterations, 0, 0, "test26");
2497                 simple_free_urb(urb);
2498                 break;
2499         case 27:
2500                 /* We do performance test, so ignore data compare */
2501                 if (dev->out_pipe == 0 || param->sglen == 0 || pattern != 0)
2502                         break;
2503                 dev_info(&intf->dev,
2504                         "TEST 27: bulk write %dMbytes\n", (param->iterations *
2505                         param->sglen * param->length) / (1024 * 1024));
2506                 retval = test_queue(dev, param,
2507                                 dev->out_pipe, NULL, 0);
2508                 break;
2509         case 28:
2510                 if (dev->in_pipe == 0 || param->sglen == 0 || pattern != 0)
2511                         break;
2512                 dev_info(&intf->dev,
2513                         "TEST 28: bulk read %dMbytes\n", (param->iterations *
2514                         param->sglen * param->length) / (1024 * 1024));
2515                 retval = test_queue(dev, param,
2516                                 dev->in_pipe, NULL, 0);
2517                 break;
2518         }
2519         return retval;
2520 }
2521 
2522 /*-------------------------------------------------------------------------*/
2523 
2524 /* We only have this one interface to user space, through usbfs.
2525  * User mode code can scan usbfs to find N different devices (maybe on
2526  * different busses) to use when testing, and allocate one thread per
2527  * test.  So discovery is simplified, and we have no device naming issues.
2528  *
2529  * Don't use these only as stress/load tests.  Use them along with with
2530  * other USB bus activity:  plugging, unplugging, mousing, mp3 playback,
2531  * video capture, and so on.  Run different tests at different times, in
2532  * different sequences.  Nothing here should interact with other devices,
2533  * except indirectly by consuming USB bandwidth and CPU resources for test
2534  * threads and request completion.  But the only way to know that for sure
2535  * is to test when HC queues are in use by many devices.
2536  *
2537  * WARNING:  Because usbfs grabs udev->dev.sem before calling this ioctl(),
2538  * it locks out usbcore in certain code paths.  Notably, if you disconnect
2539  * the device-under-test, hub_wq will wait block forever waiting for the
2540  * ioctl to complete ... so that usb_disconnect() can abort the pending
2541  * urbs and then call usbtest_disconnect().  To abort a test, you're best
2542  * off just killing the userspace task and waiting for it to exit.
2543  */
2544 
2545 static int
2546 usbtest_ioctl(struct usb_interface *intf, unsigned int code, void *buf)
2547 {
2548 
2549         struct usbtest_dev      *dev = usb_get_intfdata(intf);
2550         struct usbtest_param_64 *param_64 = buf;
2551         struct usbtest_param_32 temp;
2552         struct usbtest_param_32 *param_32 = buf;
2553         struct timespec64 start;
2554         struct timespec64 end;
2555         struct timespec64 duration;
2556         int retval = -EOPNOTSUPP;
2557 
2558         /* FIXME USBDEVFS_CONNECTINFO doesn't say how fast the device is. */
2559 
2560         pattern = mod_pattern;
2561 
2562         if (mutex_lock_interruptible(&dev->lock))
2563                 return -ERESTARTSYS;
2564 
2565         /* FIXME: What if a system sleep starts while a test is running? */
2566 
2567         /* some devices, like ez-usb default devices, need a non-default
2568          * altsetting to have any active endpoints.  some tests change
2569          * altsettings; force a default so most tests don't need to check.
2570          */
2571         if (dev->info->alt >= 0) {
2572                 if (intf->altsetting->desc.bInterfaceNumber) {
2573                         retval = -ENODEV;
2574                         goto free_mutex;
2575                 }
2576                 retval = set_altsetting(dev, dev->info->alt);
2577                 if (retval) {
2578                         dev_err(&intf->dev,
2579                                         "set altsetting to %d failed, %d\n",
2580                                         dev->info->alt, retval);
2581                         goto free_mutex;
2582                 }
2583         }
2584 
2585         switch (code) {
2586         case USBTEST_REQUEST_64:
2587                 temp.test_num = param_64->test_num;
2588                 temp.iterations = param_64->iterations;
2589                 temp.length = param_64->length;
2590                 temp.sglen = param_64->sglen;
2591                 temp.vary = param_64->vary;
2592                 param_32 = &temp;
2593                 break;
2594 
2595         case USBTEST_REQUEST_32:
2596                 break;
2597 
2598         default:
2599                 retval = -EOPNOTSUPP;
2600                 goto free_mutex;
2601         }
2602 
2603         ktime_get_ts64(&start);
2604 
2605         retval = usbtest_do_ioctl(intf, param_32);
2606         if (retval < 0)
2607                 goto free_mutex;
2608 
2609         ktime_get_ts64(&end);
2610 
2611         duration = timespec64_sub(end, start);
2612 
2613         temp.duration_sec = duration.tv_sec;
2614         temp.duration_usec = duration.tv_nsec/NSEC_PER_USEC;
2615 
2616         switch (code) {
2617         case USBTEST_REQUEST_32:
2618                 param_32->duration_sec = temp.duration_sec;
2619                 param_32->duration_usec = temp.duration_usec;
2620                 break;
2621 
2622         case USBTEST_REQUEST_64:
2623                 param_64->duration_sec = temp.duration_sec;
2624                 param_64->duration_usec = temp.duration_usec;
2625                 break;
2626         }
2627 
2628 free_mutex:
2629         mutex_unlock(&dev->lock);
2630         return retval;
2631 }
2632 
2633 /*-------------------------------------------------------------------------*/
2634 
2635 static unsigned force_interrupt;
2636 module_param(force_interrupt, uint, 0);
2637 MODULE_PARM_DESC(force_interrupt, "0 = test default; else interrupt");
2638 
2639 #ifdef  GENERIC
2640 static unsigned short vendor;
2641 module_param(vendor, ushort, 0);
2642 MODULE_PARM_DESC(vendor, "vendor code (from usb-if)");
2643 
2644 static unsigned short product;
2645 module_param(product, ushort, 0);
2646 MODULE_PARM_DESC(product, "product code (from vendor)");
2647 #endif
2648 
2649 static int
2650 usbtest_probe(struct usb_interface *intf, const struct usb_device_id *id)
2651 {
2652         struct usb_device       *udev;
2653         struct usbtest_dev      *dev;
2654         struct usbtest_info     *info;
2655         char                    *rtest, *wtest;
2656         char                    *irtest, *iwtest;
2657         char                    *intrtest, *intwtest;
2658 
2659         udev = interface_to_usbdev(intf);
2660 
2661 #ifdef  GENERIC
2662         /* specify devices by module parameters? */
2663         if (id->match_flags == 0) {
2664                 /* vendor match required, product match optional */
2665                 if (!vendor || le16_to_cpu(udev->descriptor.idVendor) != (u16)vendor)
2666                         return -ENODEV;
2667                 if (product && le16_to_cpu(udev->descriptor.idProduct) != (u16)product)
2668                         return -ENODEV;
2669                 dev_info(&intf->dev, "matched module params, "
2670                                         "vend=0x%04x prod=0x%04x\n",
2671                                 le16_to_cpu(udev->descriptor.idVendor),
2672                                 le16_to_cpu(udev->descriptor.idProduct));
2673         }
2674 #endif
2675 
2676         dev = kzalloc(sizeof(*dev), GFP_KERNEL);
2677         if (!dev)
2678                 return -ENOMEM;
2679         info = (struct usbtest_info *) id->driver_info;
2680         dev->info = info;
2681         mutex_init(&dev->lock);
2682 
2683         dev->intf = intf;
2684 
2685         /* cacheline-aligned scratch for i/o */
2686         dev->buf = kmalloc(TBUF_SIZE, GFP_KERNEL);
2687         if (dev->buf == NULL) {
2688                 kfree(dev);
2689                 return -ENOMEM;
2690         }
2691 
2692         /* NOTE this doesn't yet test the handful of difference that are
2693          * visible with high speed interrupts:  bigger maxpacket (1K) and
2694          * "high bandwidth" modes (up to 3 packets/uframe).
2695          */
2696         rtest = wtest = "";
2697         irtest = iwtest = "";
2698         intrtest = intwtest = "";
2699         if (force_interrupt || udev->speed == USB_SPEED_LOW) {
2700                 if (info->ep_in) {
2701                         dev->in_pipe = usb_rcvintpipe(udev, info->ep_in);
2702                         rtest = " intr-in";
2703                 }
2704                 if (info->ep_out) {
2705                         dev->out_pipe = usb_sndintpipe(udev, info->ep_out);
2706                         wtest = " intr-out";
2707                 }
2708         } else {
2709                 if (override_alt >= 0 || info->autoconf) {
2710                         int status;
2711 
2712                         status = get_endpoints(dev, intf);
2713                         if (status < 0) {
2714                                 WARNING(dev, "couldn't get endpoints, %d\n",
2715                                                 status);
2716                                 kfree(dev->buf);
2717                                 kfree(dev);
2718                                 return status;
2719                         }
2720                         /* may find bulk or ISO pipes */
2721                 } else {
2722                         if (info->ep_in)
2723                                 dev->in_pipe = usb_rcvbulkpipe(udev,
2724                                                         info->ep_in);
2725                         if (info->ep_out)
2726                                 dev->out_pipe = usb_sndbulkpipe(udev,
2727                                                         info->ep_out);
2728                 }
2729                 if (dev->in_pipe)
2730                         rtest = " bulk-in";
2731                 if (dev->out_pipe)
2732                         wtest = " bulk-out";
2733                 if (dev->in_iso_pipe)
2734                         irtest = " iso-in";
2735                 if (dev->out_iso_pipe)
2736                         iwtest = " iso-out";
2737                 if (dev->in_int_pipe)
2738                         intrtest = " int-in";
2739                 if (dev->out_int_pipe)
2740                         intwtest = " int-out";
2741         }
2742 
2743         usb_set_intfdata(intf, dev);
2744         dev_info(&intf->dev, "%s\n", info->name);
2745         dev_info(&intf->dev, "%s {control%s%s%s%s%s%s%s} tests%s\n",
2746                         usb_speed_string(udev->speed),
2747                         info->ctrl_out ? " in/out" : "",
2748                         rtest, wtest,
2749                         irtest, iwtest,
2750                         intrtest, intwtest,
2751                         info->alt >= 0 ? " (+alt)" : "");
2752         return 0;
2753 }
2754 
2755 static int usbtest_suspend(struct usb_interface *intf, pm_message_t message)
2756 {
2757         return 0;
2758 }
2759 
2760 static int usbtest_resume(struct usb_interface *intf)
2761 {
2762         return 0;
2763 }
2764 
2765 
2766 static void usbtest_disconnect(struct usb_interface *intf)
2767 {
2768         struct usbtest_dev      *dev = usb_get_intfdata(intf);
2769 
2770         usb_set_intfdata(intf, NULL);
2771         dev_dbg(&intf->dev, "disconnect\n");
2772         kfree(dev);
2773 }
2774 
2775 /* Basic testing only needs a device that can source or sink bulk traffic.
2776  * Any device can test control transfers (default with GENERIC binding).
2777  *
2778  * Several entries work with the default EP0 implementation that's built
2779  * into EZ-USB chips.  There's a default vendor ID which can be overridden
2780  * by (very) small config EEPROMS, but otherwise all these devices act
2781  * identically until firmware is loaded:  only EP0 works.  It turns out
2782  * to be easy to make other endpoints work, without modifying that EP0
2783  * behavior.  For now, we expect that kind of firmware.
2784  */
2785 
2786 /* an21xx or fx versions of ez-usb */
2787 static struct usbtest_info ez1_info = {
2788         .name           = "EZ-USB device",
2789         .ep_in          = 2,
2790         .ep_out         = 2,
2791         .alt            = 1,
2792 };
2793 
2794 /* fx2 version of ez-usb */
2795 static struct usbtest_info ez2_info = {
2796         .name           = "FX2 device",
2797         .ep_in          = 6,
2798         .ep_out         = 2,
2799         .alt            = 1,
2800 };
2801 
2802 /* ezusb family device with dedicated usb test firmware,
2803  */
2804 static struct usbtest_info fw_info = {
2805         .name           = "usb test device",
2806         .ep_in          = 2,
2807         .ep_out         = 2,
2808         .alt            = 1,
2809         .autoconf       = 1,            /* iso and ctrl_out need autoconf */
2810         .ctrl_out       = 1,
2811         .iso            = 1,            /* iso_ep's are #8 in/out */
2812 };
2813 
2814 /* peripheral running Linux and 'zero.c' test firmware, or
2815  * its user-mode cousin. different versions of this use
2816  * different hardware with the same vendor/product codes.
2817  * host side MUST rely on the endpoint descriptors.
2818  */
2819 static struct usbtest_info gz_info = {
2820         .name           = "Linux gadget zero",
2821         .autoconf       = 1,
2822         .ctrl_out       = 1,
2823         .iso            = 1,
2824         .intr           = 1,
2825         .alt            = 0,
2826 };
2827 
2828 static struct usbtest_info um_info = {
2829         .name           = "Linux user mode test driver",
2830         .autoconf       = 1,
2831         .alt            = -1,
2832 };
2833 
2834 static struct usbtest_info um2_info = {
2835         .name           = "Linux user mode ISO test driver",
2836         .autoconf       = 1,
2837         .iso            = 1,
2838         .alt            = -1,
2839 };
2840 
2841 #ifdef IBOT2
2842 /* this is a nice source of high speed bulk data;
2843  * uses an FX2, with firmware provided in the device
2844  */
2845 static struct usbtest_info ibot2_info = {
2846         .name           = "iBOT2 webcam",
2847         .ep_in          = 2,
2848         .alt            = -1,
2849 };
2850 #endif
2851 
2852 #ifdef GENERIC
2853 /* we can use any device to test control traffic */
2854 static struct usbtest_info generic_info = {
2855         .name           = "Generic USB device",
2856         .alt            = -1,
2857 };
2858 #endif
2859 
2860 
2861 static const struct usb_device_id id_table[] = {
2862 
2863         /*-------------------------------------------------------------*/
2864 
2865         /* EZ-USB devices which download firmware to replace (or in our
2866          * case augment) the default device implementation.
2867          */
2868 
2869         /* generic EZ-USB FX controller */
2870         { USB_DEVICE(0x0547, 0x2235),
2871                 .driver_info = (unsigned long) &ez1_info,
2872         },
2873 
2874         /* CY3671 development board with EZ-USB FX */
2875         { USB_DEVICE(0x0547, 0x0080),
2876                 .driver_info = (unsigned long) &ez1_info,
2877         },
2878 
2879         /* generic EZ-USB FX2 controller (or development board) */
2880         { USB_DEVICE(0x04b4, 0x8613),
2881                 .driver_info = (unsigned long) &ez2_info,
2882         },
2883 
2884         /* re-enumerated usb test device firmware */
2885         { USB_DEVICE(0xfff0, 0xfff0),
2886                 .driver_info = (unsigned long) &fw_info,
2887         },
2888 
2889         /* "Gadget Zero" firmware runs under Linux */
2890         { USB_DEVICE(0x0525, 0xa4a0),
2891                 .driver_info = (unsigned long) &gz_info,
2892         },
2893 
2894         /* so does a user-mode variant */
2895         { USB_DEVICE(0x0525, 0xa4a4),
2896                 .driver_info = (unsigned long) &um_info,
2897         },
2898 
2899         /* ... and a user-mode variant that talks iso */
2900         { USB_DEVICE(0x0525, 0xa4a3),
2901                 .driver_info = (unsigned long) &um2_info,
2902         },
2903 
2904 #ifdef KEYSPAN_19Qi
2905         /* Keyspan 19qi uses an21xx (original EZ-USB) */
2906         /* this does not coexist with the real Keyspan 19qi driver! */
2907         { USB_DEVICE(0x06cd, 0x010b),
2908                 .driver_info = (unsigned long) &ez1_info,
2909         },
2910 #endif
2911 
2912         /*-------------------------------------------------------------*/
2913 
2914 #ifdef IBOT2
2915         /* iBOT2 makes a nice source of high speed bulk-in data */
2916         /* this does not coexist with a real iBOT2 driver! */
2917         { USB_DEVICE(0x0b62, 0x0059),
2918                 .driver_info = (unsigned long) &ibot2_info,
2919         },
2920 #endif
2921 
2922         /*-------------------------------------------------------------*/
2923 
2924 #ifdef GENERIC
2925         /* module params can specify devices to use for control tests */
2926         { .driver_info = (unsigned long) &generic_info, },
2927 #endif
2928 
2929         /*-------------------------------------------------------------*/
2930 
2931         { }
2932 };
2933 MODULE_DEVICE_TABLE(usb, id_table);
2934 
2935 static struct usb_driver usbtest_driver = {
2936         .name =         "usbtest",
2937         .id_table =     id_table,
2938         .probe =        usbtest_probe,
2939         .unlocked_ioctl = usbtest_ioctl,
2940         .disconnect =   usbtest_disconnect,
2941         .suspend =      usbtest_suspend,
2942         .resume =       usbtest_resume,
2943 };
2944 
2945 /*-------------------------------------------------------------------------*/
2946 
2947 static int __init usbtest_init(void)
2948 {
2949 #ifdef GENERIC
2950         if (vendor)
2951                 pr_debug("params: vend=0x%04x prod=0x%04x\n", vendor, product);
2952 #endif
2953         return usb_register(&usbtest_driver);
2954 }
2955 module_init(usbtest_init);
2956 
2957 static void __exit usbtest_exit(void)
2958 {
2959         usb_deregister(&usbtest_driver);
2960 }
2961 module_exit(usbtest_exit);
2962 
2963 MODULE_DESCRIPTION("USB Core/HCD Testing Driver");
2964 MODULE_LICENSE("GPL");
2965 
2966 

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