Version:  2.0.40 2.2.26 2.4.37 3.9 3.10 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

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

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