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1/*
2 * Char device for device raw access
3 *
4 * Copyright (C) 2005-2007 Kristian Hoegsberg <krh@bitplanet.net>
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software Foundation,
18 * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
19 */
20
21#include <linux/bug.h>
22#include <linux/compat.h>
23#include <linux/delay.h>
24#include <linux/device.h>
25#include <linux/dma-mapping.h>
26#include <linux/errno.h>
27#include <linux/firewire.h>
28#include <linux/firewire-cdev.h>
29#include <linux/idr.h>
30#include <linux/irqflags.h>
31#include <linux/jiffies.h>
32#include <linux/kernel.h>
33#include <linux/kref.h>
34#include <linux/mm.h>
35#include <linux/module.h>
36#include <linux/mutex.h>
37#include <linux/poll.h>
38#include <linux/sched.h> /* required for linux/wait.h */
39#include <linux/slab.h>
40#include <linux/spinlock.h>
41#include <linux/string.h>
42#include <linux/time.h>
43#include <linux/uaccess.h>
44#include <linux/vmalloc.h>
45#include <linux/wait.h>
46#include <linux/workqueue.h>
47
48
49#include "core.h"
50
51/*
52 * ABI version history is documented in linux/firewire-cdev.h.
53 */
54#define FW_CDEV_KERNEL_VERSION 5
55#define FW_CDEV_VERSION_EVENT_REQUEST2 4
56#define FW_CDEV_VERSION_ALLOCATE_REGION_END 4
57
58struct client {
59 u32 version;
60 struct fw_device *device;
61
62 spinlock_t lock;
63 bool in_shutdown;
64 struct idr resource_idr;
65 struct list_head event_list;
66 wait_queue_head_t wait;
67 wait_queue_head_t tx_flush_wait;
68 u64 bus_reset_closure;
69
70 struct fw_iso_context *iso_context;
71 u64 iso_closure;
72 struct fw_iso_buffer buffer;
73 unsigned long vm_start;
74 bool buffer_is_mapped;
75
76 struct list_head phy_receiver_link;
77 u64 phy_receiver_closure;
78
79 struct list_head link;
80 struct kref kref;
81};
82
83static inline void client_get(struct client *client)
84{
85 kref_get(&client->kref);
86}
87
88static void client_release(struct kref *kref)
89{
90 struct client *client = container_of(kref, struct client, kref);
91
92 fw_device_put(client->device);
93 kfree(client);
94}
95
96static void client_put(struct client *client)
97{
98 kref_put(&client->kref, client_release);
99}
100
101struct client_resource;
102typedef void (*client_resource_release_fn_t)(struct client *,
103 struct client_resource *);
104struct client_resource {
105 client_resource_release_fn_t release;
106 int handle;
107};
108
109struct address_handler_resource {
110 struct client_resource resource;
111 struct fw_address_handler handler;
112 __u64 closure;
113 struct client *client;
114};
115
116struct outbound_transaction_resource {
117 struct client_resource resource;
118 struct fw_transaction transaction;
119};
120
121struct inbound_transaction_resource {
122 struct client_resource resource;
123 struct fw_card *card;
124 struct fw_request *request;
125 void *data;
126 size_t length;
127};
128
129struct descriptor_resource {
130 struct client_resource resource;
131 struct fw_descriptor descriptor;
132 u32 data[0];
133};
134
135struct iso_resource {
136 struct client_resource resource;
137 struct client *client;
138 /* Schedule work and access todo only with client->lock held. */
139 struct delayed_work work;
140 enum {ISO_RES_ALLOC, ISO_RES_REALLOC, ISO_RES_DEALLOC,
141 ISO_RES_ALLOC_ONCE, ISO_RES_DEALLOC_ONCE,} todo;
142 int generation;
143 u64 channels;
144 s32 bandwidth;
145 struct iso_resource_event *e_alloc, *e_dealloc;
146};
147
148static void release_iso_resource(struct client *, struct client_resource *);
149
150static void schedule_iso_resource(struct iso_resource *r, unsigned long delay)
151{
152 client_get(r->client);
153 if (!queue_delayed_work(fw_workqueue, &r->work, delay))
154 client_put(r->client);
155}
156
157static void schedule_if_iso_resource(struct client_resource *resource)
158{
159 if (resource->release == release_iso_resource)
160 schedule_iso_resource(container_of(resource,
161 struct iso_resource, resource), 0);
162}
163
164/*
165 * dequeue_event() just kfree()'s the event, so the event has to be
166 * the first field in a struct XYZ_event.
167 */
168struct event {
169 struct { void *data; size_t size; } v[2];
170 struct list_head link;
171};
172
173struct bus_reset_event {
174 struct event event;
175 struct fw_cdev_event_bus_reset reset;
176};
177
178struct outbound_transaction_event {
179 struct event event;
180 struct client *client;
181 struct outbound_transaction_resource r;
182 struct fw_cdev_event_response response;
183};
184
185struct inbound_transaction_event {
186 struct event event;
187 union {
188 struct fw_cdev_event_request request;
189 struct fw_cdev_event_request2 request2;
190 } req;
191};
192
193struct iso_interrupt_event {
194 struct event event;
195 struct fw_cdev_event_iso_interrupt interrupt;
196};
197
198struct iso_interrupt_mc_event {
199 struct event event;
200 struct fw_cdev_event_iso_interrupt_mc interrupt;
201};
202
203struct iso_resource_event {
204 struct event event;
205 struct fw_cdev_event_iso_resource iso_resource;
206};
207
208struct outbound_phy_packet_event {
209 struct event event;
210 struct client *client;
211 struct fw_packet p;
212 struct fw_cdev_event_phy_packet phy_packet;
213};
214
215struct inbound_phy_packet_event {
216 struct event event;
217 struct fw_cdev_event_phy_packet phy_packet;
218};
219
220#ifdef CONFIG_COMPAT
221static void __user *u64_to_uptr(u64 value)
222{
223 if (is_compat_task())
224 return compat_ptr(value);
225 else
226 return (void __user *)(unsigned long)value;
227}
228
229static u64 uptr_to_u64(void __user *ptr)
230{
231 if (is_compat_task())
232 return ptr_to_compat(ptr);
233 else
234 return (u64)(unsigned long)ptr;
235}
236#else
237static inline void __user *u64_to_uptr(u64 value)
238{
239 return (void __user *)(unsigned long)value;
240}
241
242static inline u64 uptr_to_u64(void __user *ptr)
243{
244 return (u64)(unsigned long)ptr;
245}
246#endif /* CONFIG_COMPAT */
247
248static int fw_device_op_open(struct inode *inode, struct file *file)
249{
250 struct fw_device *device;
251 struct client *client;
252
253 device = fw_device_get_by_devt(inode->i_rdev);
254 if (device == NULL)
255 return -ENODEV;
256
257 if (fw_device_is_shutdown(device)) {
258 fw_device_put(device);
259 return -ENODEV;
260 }
261
262 client = kzalloc(sizeof(*client), GFP_KERNEL);
263 if (client == NULL) {
264 fw_device_put(device);
265 return -ENOMEM;
266 }
267
268 client->device = device;
269 spin_lock_init(&client->lock);
270 idr_init(&client->resource_idr);
271 INIT_LIST_HEAD(&client->event_list);
272 init_waitqueue_head(&client->wait);
273 init_waitqueue_head(&client->tx_flush_wait);
274 INIT_LIST_HEAD(&client->phy_receiver_link);
275 INIT_LIST_HEAD(&client->link);
276 kref_init(&client->kref);
277
278 file->private_data = client;
279
280 return nonseekable_open(inode, file);
281}
282
283static void queue_event(struct client *client, struct event *event,
284 void *data0, size_t size0, void *data1, size_t size1)
285{
286 unsigned long flags;
287
288 event->v[0].data = data0;
289 event->v[0].size = size0;
290 event->v[1].data = data1;
291 event->v[1].size = size1;
292
293 spin_lock_irqsave(&client->lock, flags);
294 if (client->in_shutdown)
295 kfree(event);
296 else
297 list_add_tail(&event->link, &client->event_list);
298 spin_unlock_irqrestore(&client->lock, flags);
299
300 wake_up_interruptible(&client->wait);
301}
302
303static int dequeue_event(struct client *client,
304 char __user *buffer, size_t count)
305{
306 struct event *event;
307 size_t size, total;
308 int i, ret;
309
310 ret = wait_event_interruptible(client->wait,
311 !list_empty(&client->event_list) ||
312 fw_device_is_shutdown(client->device));
313 if (ret < 0)
314 return ret;
315
316 if (list_empty(&client->event_list) &&
317 fw_device_is_shutdown(client->device))
318 return -ENODEV;
319
320 spin_lock_irq(&client->lock);
321 event = list_first_entry(&client->event_list, struct event, link);
322 list_del(&event->link);
323 spin_unlock_irq(&client->lock);
324
325 total = 0;
326 for (i = 0; i < ARRAY_SIZE(event->v) && total < count; i++) {
327 size = min(event->v[i].size, count - total);
328 if (copy_to_user(buffer + total, event->v[i].data, size)) {
329 ret = -EFAULT;
330 goto out;
331 }
332 total += size;
333 }
334 ret = total;
335
336 out:
337 kfree(event);
338
339 return ret;
340}
341
342static ssize_t fw_device_op_read(struct file *file, char __user *buffer,
343 size_t count, loff_t *offset)
344{
345 struct client *client = file->private_data;
346
347 return dequeue_event(client, buffer, count);
348}
349
350static void fill_bus_reset_event(struct fw_cdev_event_bus_reset *event,
351 struct client *client)
352{
353 struct fw_card *card = client->device->card;
354
355 spin_lock_irq(&card->lock);
356
357 event->closure = client->bus_reset_closure;
358 event->type = FW_CDEV_EVENT_BUS_RESET;
359 event->generation = client->device->generation;
360 event->node_id = client->device->node_id;
361 event->local_node_id = card->local_node->node_id;
362 event->bm_node_id = card->bm_node_id;
363 event->irm_node_id = card->irm_node->node_id;
364 event->root_node_id = card->root_node->node_id;
365
366 spin_unlock_irq(&card->lock);
367}
368
369static void for_each_client(struct fw_device *device,
370 void (*callback)(struct client *client))
371{
372 struct client *c;
373
374 mutex_lock(&device->client_list_mutex);
375 list_for_each_entry(c, &device->client_list, link)
376 callback(c);
377 mutex_unlock(&device->client_list_mutex);
378}
379
380static int schedule_reallocations(int id, void *p, void *data)
381{
382 schedule_if_iso_resource(p);
383
384 return 0;
385}
386
387static void queue_bus_reset_event(struct client *client)
388{
389 struct bus_reset_event *e;
390
391 e = kzalloc(sizeof(*e), GFP_KERNEL);
392 if (e == NULL) {
393 fw_notice(client->device->card, "out of memory when allocating event\n");
394 return;
395 }
396
397 fill_bus_reset_event(&e->reset, client);
398
399 queue_event(client, &e->event,
400 &e->reset, sizeof(e->reset), NULL, 0);
401
402 spin_lock_irq(&client->lock);
403 idr_for_each(&client->resource_idr, schedule_reallocations, client);
404 spin_unlock_irq(&client->lock);
405}
406
407void fw_device_cdev_update(struct fw_device *device)
408{
409 for_each_client(device, queue_bus_reset_event);
410}
411
412static void wake_up_client(struct client *client)
413{
414 wake_up_interruptible(&client->wait);
415}
416
417void fw_device_cdev_remove(struct fw_device *device)
418{
419 for_each_client(device, wake_up_client);
420}
421
422union ioctl_arg {
423 struct fw_cdev_get_info get_info;
424 struct fw_cdev_send_request send_request;
425 struct fw_cdev_allocate allocate;
426 struct fw_cdev_deallocate deallocate;
427 struct fw_cdev_send_response send_response;
428 struct fw_cdev_initiate_bus_reset initiate_bus_reset;
429 struct fw_cdev_add_descriptor add_descriptor;
430 struct fw_cdev_remove_descriptor remove_descriptor;
431 struct fw_cdev_create_iso_context create_iso_context;
432 struct fw_cdev_queue_iso queue_iso;
433 struct fw_cdev_start_iso start_iso;
434 struct fw_cdev_stop_iso stop_iso;
435 struct fw_cdev_get_cycle_timer get_cycle_timer;
436 struct fw_cdev_allocate_iso_resource allocate_iso_resource;
437 struct fw_cdev_send_stream_packet send_stream_packet;
438 struct fw_cdev_get_cycle_timer2 get_cycle_timer2;
439 struct fw_cdev_send_phy_packet send_phy_packet;
440 struct fw_cdev_receive_phy_packets receive_phy_packets;
441 struct fw_cdev_set_iso_channels set_iso_channels;
442 struct fw_cdev_flush_iso flush_iso;
443};
444
445static int ioctl_get_info(struct client *client, union ioctl_arg *arg)
446{
447 struct fw_cdev_get_info *a = &arg->get_info;
448 struct fw_cdev_event_bus_reset bus_reset;
449 unsigned long ret = 0;
450
451 client->version = a->version;
452 a->version = FW_CDEV_KERNEL_VERSION;
453 a->card = client->device->card->index;
454
455 down_read(&fw_device_rwsem);
456
457 if (a->rom != 0) {
458 size_t want = a->rom_length;
459 size_t have = client->device->config_rom_length * 4;
460
461 ret = copy_to_user(u64_to_uptr(a->rom),
462 client->device->config_rom, min(want, have));
463 }
464 a->rom_length = client->device->config_rom_length * 4;
465
466 up_read(&fw_device_rwsem);
467
468 if (ret != 0)
469 return -EFAULT;
470
471 mutex_lock(&client->device->client_list_mutex);
472
473 client->bus_reset_closure = a->bus_reset_closure;
474 if (a->bus_reset != 0) {
475 fill_bus_reset_event(&bus_reset, client);
476 ret = copy_to_user(u64_to_uptr(a->bus_reset),
477 &bus_reset, sizeof(bus_reset));
478 }
479 if (ret == 0 && list_empty(&client->link))
480 list_add_tail(&client->link, &client->device->client_list);
481
482 mutex_unlock(&client->device->client_list_mutex);
483
484 return ret ? -EFAULT : 0;
485}
486
487static int add_client_resource(struct client *client,
488 struct client_resource *resource, gfp_t gfp_mask)
489{
490 unsigned long flags;
491 int ret;
492
493 retry:
494 if (idr_pre_get(&client->resource_idr, gfp_mask) == 0)
495 return -ENOMEM;
496
497 spin_lock_irqsave(&client->lock, flags);
498 if (client->in_shutdown)
499 ret = -ECANCELED;
500 else
501 ret = idr_get_new(&client->resource_idr, resource,
502 &resource->handle);
503 if (ret >= 0) {
504 client_get(client);
505 schedule_if_iso_resource(resource);
506 }
507 spin_unlock_irqrestore(&client->lock, flags);
508
509 if (ret == -EAGAIN)
510 goto retry;
511
512 return ret < 0 ? ret : 0;
513}
514
515static int release_client_resource(struct client *client, u32 handle,
516 client_resource_release_fn_t release,
517 struct client_resource **return_resource)
518{
519 struct client_resource *resource;
520
521 spin_lock_irq(&client->lock);
522 if (client->in_shutdown)
523 resource = NULL;
524 else
525 resource = idr_find(&client->resource_idr, handle);
526 if (resource && resource->release == release)
527 idr_remove(&client->resource_idr, handle);
528 spin_unlock_irq(&client->lock);
529
530 if (!(resource && resource->release == release))
531 return -EINVAL;
532
533 if (return_resource)
534 *return_resource = resource;
535 else
536 resource->release(client, resource);
537
538 client_put(client);
539
540 return 0;
541}
542
543static void release_transaction(struct client *client,
544 struct client_resource *resource)
545{
546}
547
548static void complete_transaction(struct fw_card *card, int rcode,
549 void *payload, size_t length, void *data)
550{
551 struct outbound_transaction_event *e = data;
552 struct fw_cdev_event_response *rsp = &e->response;
553 struct client *client = e->client;
554 unsigned long flags;
555
556 if (length < rsp->length)
557 rsp->length = length;
558 if (rcode == RCODE_COMPLETE)
559 memcpy(rsp->data, payload, rsp->length);
560
561 spin_lock_irqsave(&client->lock, flags);
562 idr_remove(&client->resource_idr, e->r.resource.handle);
563 if (client->in_shutdown)
564 wake_up(&client->tx_flush_wait);
565 spin_unlock_irqrestore(&client->lock, flags);
566
567 rsp->type = FW_CDEV_EVENT_RESPONSE;
568 rsp->rcode = rcode;
569
570 /*
571 * In the case that sizeof(*rsp) doesn't align with the position of the
572 * data, and the read is short, preserve an extra copy of the data
573 * to stay compatible with a pre-2.6.27 bug. Since the bug is harmless
574 * for short reads and some apps depended on it, this is both safe
575 * and prudent for compatibility.
576 */
577 if (rsp->length <= sizeof(*rsp) - offsetof(typeof(*rsp), data))
578 queue_event(client, &e->event, rsp, sizeof(*rsp),
579 rsp->data, rsp->length);
580 else
581 queue_event(client, &e->event, rsp, sizeof(*rsp) + rsp->length,
582 NULL, 0);
583
584 /* Drop the idr's reference */
585 client_put(client);
586}
587
588static int init_request(struct client *client,
589 struct fw_cdev_send_request *request,
590 int destination_id, int speed)
591{
592 struct outbound_transaction_event *e;
593 int ret;
594
595 if (request->tcode != TCODE_STREAM_DATA &&
596 (request->length > 4096 || request->length > 512 << speed))
597 return -EIO;
598
599 if (request->tcode == TCODE_WRITE_QUADLET_REQUEST &&
600 request->length < 4)
601 return -EINVAL;
602
603 e = kmalloc(sizeof(*e) + request->length, GFP_KERNEL);
604 if (e == NULL)
605 return -ENOMEM;
606
607 e->client = client;
608 e->response.length = request->length;
609 e->response.closure = request->closure;
610
611 if (request->data &&
612 copy_from_user(e->response.data,
613 u64_to_uptr(request->data), request->length)) {
614 ret = -EFAULT;
615 goto failed;
616 }
617
618 e->r.resource.release = release_transaction;
619 ret = add_client_resource(client, &e->r.resource, GFP_KERNEL);
620 if (ret < 0)
621 goto failed;
622
623 fw_send_request(client->device->card, &e->r.transaction,
624 request->tcode, destination_id, request->generation,
625 speed, request->offset, e->response.data,
626 request->length, complete_transaction, e);
627 return 0;
628
629 failed:
630 kfree(e);
631
632 return ret;
633}
634
635static int ioctl_send_request(struct client *client, union ioctl_arg *arg)
636{
637 switch (arg->send_request.tcode) {
638 case TCODE_WRITE_QUADLET_REQUEST:
639 case TCODE_WRITE_BLOCK_REQUEST:
640 case TCODE_READ_QUADLET_REQUEST:
641 case TCODE_READ_BLOCK_REQUEST:
642 case TCODE_LOCK_MASK_SWAP:
643 case TCODE_LOCK_COMPARE_SWAP:
644 case TCODE_LOCK_FETCH_ADD:
645 case TCODE_LOCK_LITTLE_ADD:
646 case TCODE_LOCK_BOUNDED_ADD:
647 case TCODE_LOCK_WRAP_ADD:
648 case TCODE_LOCK_VENDOR_DEPENDENT:
649 break;
650 default:
651 return -EINVAL;
652 }
653
654 return init_request(client, &arg->send_request, client->device->node_id,
655 client->device->max_speed);
656}
657
658static inline bool is_fcp_request(struct fw_request *request)
659{
660 return request == NULL;
661}
662
663static void release_request(struct client *client,
664 struct client_resource *resource)
665{
666 struct inbound_transaction_resource *r = container_of(resource,
667 struct inbound_transaction_resource, resource);
668
669 if (is_fcp_request(r->request))
670 kfree(r->data);
671 else
672 fw_send_response(r->card, r->request, RCODE_CONFLICT_ERROR);
673
674 fw_card_put(r->card);
675 kfree(r);
676}
677
678static void handle_request(struct fw_card *card, struct fw_request *request,
679 int tcode, int destination, int source,
680 int generation, unsigned long long offset,
681 void *payload, size_t length, void *callback_data)
682{
683 struct address_handler_resource *handler = callback_data;
684 struct inbound_transaction_resource *r;
685 struct inbound_transaction_event *e;
686 size_t event_size0;
687 void *fcp_frame = NULL;
688 int ret;
689
690 /* card may be different from handler->client->device->card */
691 fw_card_get(card);
692
693 r = kmalloc(sizeof(*r), GFP_ATOMIC);
694 e = kmalloc(sizeof(*e), GFP_ATOMIC);
695 if (r == NULL || e == NULL) {
696 fw_notice(card, "out of memory when allocating event\n");
697 goto failed;
698 }
699 r->card = card;
700 r->request = request;
701 r->data = payload;
702 r->length = length;
703
704 if (is_fcp_request(request)) {
705 /*
706 * FIXME: Let core-transaction.c manage a
707 * single reference-counted copy?
708 */
709 fcp_frame = kmemdup(payload, length, GFP_ATOMIC);
710 if (fcp_frame == NULL)
711 goto failed;
712
713 r->data = fcp_frame;
714 }
715
716 r->resource.release = release_request;
717 ret = add_client_resource(handler->client, &r->resource, GFP_ATOMIC);
718 if (ret < 0)
719 goto failed;
720
721 if (handler->client->version < FW_CDEV_VERSION_EVENT_REQUEST2) {
722 struct fw_cdev_event_request *req = &e->req.request;
723
724 if (tcode & 0x10)
725 tcode = TCODE_LOCK_REQUEST;
726
727 req->type = FW_CDEV_EVENT_REQUEST;
728 req->tcode = tcode;
729 req->offset = offset;
730 req->length = length;
731 req->handle = r->resource.handle;
732 req->closure = handler->closure;
733 event_size0 = sizeof(*req);
734 } else {
735 struct fw_cdev_event_request2 *req = &e->req.request2;
736
737 req->type = FW_CDEV_EVENT_REQUEST2;
738 req->tcode = tcode;
739 req->offset = offset;
740 req->source_node_id = source;
741 req->destination_node_id = destination;
742 req->card = card->index;
743 req->generation = generation;
744 req->length = length;
745 req->handle = r->resource.handle;
746 req->closure = handler->closure;
747 event_size0 = sizeof(*req);
748 }
749
750 queue_event(handler->client, &e->event,
751 &e->req, event_size0, r->data, length);
752 return;
753
754 failed:
755 kfree(r);
756 kfree(e);
757 kfree(fcp_frame);
758
759 if (!is_fcp_request(request))
760 fw_send_response(card, request, RCODE_CONFLICT_ERROR);
761
762 fw_card_put(card);
763}
764
765static void release_address_handler(struct client *client,
766 struct client_resource *resource)
767{
768 struct address_handler_resource *r =
769 container_of(resource, struct address_handler_resource, resource);
770
771 fw_core_remove_address_handler(&r->handler);
772 kfree(r);
773}
774
775static int ioctl_allocate(struct client *client, union ioctl_arg *arg)
776{
777 struct fw_cdev_allocate *a = &arg->allocate;
778 struct address_handler_resource *r;
779 struct fw_address_region region;
780 int ret;
781
782 r = kmalloc(sizeof(*r), GFP_KERNEL);
783 if (r == NULL)
784 return -ENOMEM;
785
786 region.start = a->offset;
787 if (client->version < FW_CDEV_VERSION_ALLOCATE_REGION_END)
788 region.end = a->offset + a->length;
789 else
790 region.end = a->region_end;
791
792 r->handler.length = a->length;
793 r->handler.address_callback = handle_request;
794 r->handler.callback_data = r;
795 r->closure = a->closure;
796 r->client = client;
797
798 ret = fw_core_add_address_handler(&r->handler, ®ion);
799 if (ret < 0) {
800 kfree(r);
801 return ret;
802 }
803 a->offset = r->handler.offset;
804
805 r->resource.release = release_address_handler;
806 ret = add_client_resource(client, &r->resource, GFP_KERNEL);
807 if (ret < 0) {
808 release_address_handler(client, &r->resource);
809 return ret;
810 }
811 a->handle = r->resource.handle;
812
813 return 0;
814}
815
816static int ioctl_deallocate(struct client *client, union ioctl_arg *arg)
817{
818 return release_client_resource(client, arg->deallocate.handle,
819 release_address_handler, NULL);
820}
821
822static int ioctl_send_response(struct client *client, union ioctl_arg *arg)
823{
824 struct fw_cdev_send_response *a = &arg->send_response;
825 struct client_resource *resource;
826 struct inbound_transaction_resource *r;
827 int ret = 0;
828
829 if (release_client_resource(client, a->handle,
830 release_request, &resource) < 0)
831 return -EINVAL;
832
833 r = container_of(resource, struct inbound_transaction_resource,
834 resource);
835 if (is_fcp_request(r->request))
836 goto out;
837
838 if (a->length != fw_get_response_length(r->request)) {
839 ret = -EINVAL;
840 kfree(r->request);
841 goto out;
842 }
843 if (copy_from_user(r->data, u64_to_uptr(a->data), a->length)) {
844 ret = -EFAULT;
845 kfree(r->request);
846 goto out;
847 }
848 fw_send_response(r->card, r->request, a->rcode);
849 out:
850 fw_card_put(r->card);
851 kfree(r);
852
853 return ret;
854}
855
856static int ioctl_initiate_bus_reset(struct client *client, union ioctl_arg *arg)
857{
858 fw_schedule_bus_reset(client->device->card, true,
859 arg->initiate_bus_reset.type == FW_CDEV_SHORT_RESET);
860 return 0;
861}
862
863static void release_descriptor(struct client *client,
864 struct client_resource *resource)
865{
866 struct descriptor_resource *r =
867 container_of(resource, struct descriptor_resource, resource);
868
869 fw_core_remove_descriptor(&r->descriptor);
870 kfree(r);
871}
872
873static int ioctl_add_descriptor(struct client *client, union ioctl_arg *arg)
874{
875 struct fw_cdev_add_descriptor *a = &arg->add_descriptor;
876 struct descriptor_resource *r;
877 int ret;
878
879 /* Access policy: Allow this ioctl only on local nodes' device files. */
880 if (!client->device->is_local)
881 return -ENOSYS;
882
883 if (a->length > 256)
884 return -EINVAL;
885
886 r = kmalloc(sizeof(*r) + a->length * 4, GFP_KERNEL);
887 if (r == NULL)
888 return -ENOMEM;
889
890 if (copy_from_user(r->data, u64_to_uptr(a->data), a->length * 4)) {
891 ret = -EFAULT;
892 goto failed;
893 }
894
895 r->descriptor.length = a->length;
896 r->descriptor.immediate = a->immediate;
897 r->descriptor.key = a->key;
898 r->descriptor.data = r->data;
899
900 ret = fw_core_add_descriptor(&r->descriptor);
901 if (ret < 0)
902 goto failed;
903
904 r->resource.release = release_descriptor;
905 ret = add_client_resource(client, &r->resource, GFP_KERNEL);
906 if (ret < 0) {
907 fw_core_remove_descriptor(&r->descriptor);
908 goto failed;
909 }
910 a->handle = r->resource.handle;
911
912 return 0;
913 failed:
914 kfree(r);
915
916 return ret;
917}
918
919static int ioctl_remove_descriptor(struct client *client, union ioctl_arg *arg)
920{
921 return release_client_resource(client, arg->remove_descriptor.handle,
922 release_descriptor, NULL);
923}
924
925static void iso_callback(struct fw_iso_context *context, u32 cycle,
926 size_t header_length, void *header, void *data)
927{
928 struct client *client = data;
929 struct iso_interrupt_event *e;
930
931 e = kmalloc(sizeof(*e) + header_length, GFP_ATOMIC);
932 if (e == NULL) {
933 fw_notice(context->card, "out of memory when allocating event\n");
934 return;
935 }
936 e->interrupt.type = FW_CDEV_EVENT_ISO_INTERRUPT;
937 e->interrupt.closure = client->iso_closure;
938 e->interrupt.cycle = cycle;
939 e->interrupt.header_length = header_length;
940 memcpy(e->interrupt.header, header, header_length);
941 queue_event(client, &e->event, &e->interrupt,
942 sizeof(e->interrupt) + header_length, NULL, 0);
943}
944
945static void iso_mc_callback(struct fw_iso_context *context,
946 dma_addr_t completed, void *data)
947{
948 struct client *client = data;
949 struct iso_interrupt_mc_event *e;
950
951 e = kmalloc(sizeof(*e), GFP_ATOMIC);
952 if (e == NULL) {
953 fw_notice(context->card, "out of memory when allocating event\n");
954 return;
955 }
956 e->interrupt.type = FW_CDEV_EVENT_ISO_INTERRUPT_MULTICHANNEL;
957 e->interrupt.closure = client->iso_closure;
958 e->interrupt.completed = fw_iso_buffer_lookup(&client->buffer,
959 completed);
960 queue_event(client, &e->event, &e->interrupt,
961 sizeof(e->interrupt), NULL, 0);
962}
963
964static enum dma_data_direction iso_dma_direction(struct fw_iso_context *context)
965{
966 if (context->type == FW_ISO_CONTEXT_TRANSMIT)
967 return DMA_TO_DEVICE;
968 else
969 return DMA_FROM_DEVICE;
970}
971
972static int ioctl_create_iso_context(struct client *client, union ioctl_arg *arg)
973{
974 struct fw_cdev_create_iso_context *a = &arg->create_iso_context;
975 struct fw_iso_context *context;
976 fw_iso_callback_t cb;
977 int ret;
978
979 BUILD_BUG_ON(FW_CDEV_ISO_CONTEXT_TRANSMIT != FW_ISO_CONTEXT_TRANSMIT ||
980 FW_CDEV_ISO_CONTEXT_RECEIVE != FW_ISO_CONTEXT_RECEIVE ||
981 FW_CDEV_ISO_CONTEXT_RECEIVE_MULTICHANNEL !=
982 FW_ISO_CONTEXT_RECEIVE_MULTICHANNEL);
983
984 switch (a->type) {
985 case FW_ISO_CONTEXT_TRANSMIT:
986 if (a->speed > SCODE_3200 || a->channel > 63)
987 return -EINVAL;
988
989 cb = iso_callback;
990 break;
991
992 case FW_ISO_CONTEXT_RECEIVE:
993 if (a->header_size < 4 || (a->header_size & 3) ||
994 a->channel > 63)
995 return -EINVAL;
996
997 cb = iso_callback;
998 break;
999
1000 case FW_ISO_CONTEXT_RECEIVE_MULTICHANNEL:
1001 cb = (fw_iso_callback_t)iso_mc_callback;
1002 break;
1003
1004 default:
1005 return -EINVAL;
1006 }
1007
1008 context = fw_iso_context_create(client->device->card, a->type,
1009 a->channel, a->speed, a->header_size, cb, client);
1010 if (IS_ERR(context))
1011 return PTR_ERR(context);
1012
1013 /* We only support one context at this time. */
1014 spin_lock_irq(&client->lock);
1015 if (client->iso_context != NULL) {
1016 spin_unlock_irq(&client->lock);
1017 fw_iso_context_destroy(context);
1018
1019 return -EBUSY;
1020 }
1021 if (!client->buffer_is_mapped) {
1022 ret = fw_iso_buffer_map_dma(&client->buffer,
1023 client->device->card,
1024 iso_dma_direction(context));
1025 if (ret < 0) {
1026 spin_unlock_irq(&client->lock);
1027 fw_iso_context_destroy(context);
1028
1029 return ret;
1030 }
1031 client->buffer_is_mapped = true;
1032 }
1033 client->iso_closure = a->closure;
1034 client->iso_context = context;
1035 spin_unlock_irq(&client->lock);
1036
1037 a->handle = 0;
1038
1039 return 0;
1040}
1041
1042static int ioctl_set_iso_channels(struct client *client, union ioctl_arg *arg)
1043{
1044 struct fw_cdev_set_iso_channels *a = &arg->set_iso_channels;
1045 struct fw_iso_context *ctx = client->iso_context;
1046
1047 if (ctx == NULL || a->handle != 0)
1048 return -EINVAL;
1049
1050 return fw_iso_context_set_channels(ctx, &a->channels);
1051}
1052
1053/* Macros for decoding the iso packet control header. */
1054#define GET_PAYLOAD_LENGTH(v) ((v) & 0xffff)
1055#define GET_INTERRUPT(v) (((v) >> 16) & 0x01)
1056#define GET_SKIP(v) (((v) >> 17) & 0x01)
1057#define GET_TAG(v) (((v) >> 18) & 0x03)
1058#define GET_SY(v) (((v) >> 20) & 0x0f)
1059#define GET_HEADER_LENGTH(v) (((v) >> 24) & 0xff)
1060
1061static int ioctl_queue_iso(struct client *client, union ioctl_arg *arg)
1062{
1063 struct fw_cdev_queue_iso *a = &arg->queue_iso;
1064 struct fw_cdev_iso_packet __user *p, *end, *next;
1065 struct fw_iso_context *ctx = client->iso_context;
1066 unsigned long payload, buffer_end, transmit_header_bytes = 0;
1067 u32 control;
1068 int count;
1069 struct {
1070 struct fw_iso_packet packet;
1071 u8 header[256];
1072 } u;
1073
1074 if (ctx == NULL || a->handle != 0)
1075 return -EINVAL;
1076
1077 /*
1078 * If the user passes a non-NULL data pointer, has mmap()'ed
1079 * the iso buffer, and the pointer points inside the buffer,
1080 * we setup the payload pointers accordingly. Otherwise we
1081 * set them both to 0, which will still let packets with
1082 * payload_length == 0 through. In other words, if no packets
1083 * use the indirect payload, the iso buffer need not be mapped
1084 * and the a->data pointer is ignored.
1085 */
1086 payload = (unsigned long)a->data - client->vm_start;
1087 buffer_end = client->buffer.page_count << PAGE_SHIFT;
1088 if (a->data == 0 || client->buffer.pages == NULL ||
1089 payload >= buffer_end) {
1090 payload = 0;
1091 buffer_end = 0;
1092 }
1093
1094 if (ctx->type == FW_ISO_CONTEXT_RECEIVE_MULTICHANNEL && payload & 3)
1095 return -EINVAL;
1096
1097 p = (struct fw_cdev_iso_packet __user *)u64_to_uptr(a->packets);
1098 if (!access_ok(VERIFY_READ, p, a->size))
1099 return -EFAULT;
1100
1101 end = (void __user *)p + a->size;
1102 count = 0;
1103 while (p < end) {
1104 if (get_user(control, &p->control))
1105 return -EFAULT;
1106 u.packet.payload_length = GET_PAYLOAD_LENGTH(control);
1107 u.packet.interrupt = GET_INTERRUPT(control);
1108 u.packet.skip = GET_SKIP(control);
1109 u.packet.tag = GET_TAG(control);
1110 u.packet.sy = GET_SY(control);
1111 u.packet.header_length = GET_HEADER_LENGTH(control);
1112
1113 switch (ctx->type) {
1114 case FW_ISO_CONTEXT_TRANSMIT:
1115 if (u.packet.header_length & 3)
1116 return -EINVAL;
1117 transmit_header_bytes = u.packet.header_length;
1118 break;
1119
1120 case FW_ISO_CONTEXT_RECEIVE:
1121 if (u.packet.header_length == 0 ||
1122 u.packet.header_length % ctx->header_size != 0)
1123 return -EINVAL;
1124 break;
1125
1126 case FW_ISO_CONTEXT_RECEIVE_MULTICHANNEL:
1127 if (u.packet.payload_length == 0 ||
1128 u.packet.payload_length & 3)
1129 return -EINVAL;
1130 break;
1131 }
1132
1133 next = (struct fw_cdev_iso_packet __user *)
1134 &p->header[transmit_header_bytes / 4];
1135 if (next > end)
1136 return -EINVAL;
1137 if (__copy_from_user
1138 (u.packet.header, p->header, transmit_header_bytes))
1139 return -EFAULT;
1140 if (u.packet.skip && ctx->type == FW_ISO_CONTEXT_TRANSMIT &&
1141 u.packet.header_length + u.packet.payload_length > 0)
1142 return -EINVAL;
1143 if (payload + u.packet.payload_length > buffer_end)
1144 return -EINVAL;
1145
1146 if (fw_iso_context_queue(ctx, &u.packet,
1147 &client->buffer, payload))
1148 break;
1149
1150 p = next;
1151 payload += u.packet.payload_length;
1152 count++;
1153 }
1154 fw_iso_context_queue_flush(ctx);
1155
1156 a->size -= uptr_to_u64(p) - a->packets;
1157 a->packets = uptr_to_u64(p);
1158 a->data = client->vm_start + payload;
1159
1160 return count;
1161}
1162
1163static int ioctl_start_iso(struct client *client, union ioctl_arg *arg)
1164{
1165 struct fw_cdev_start_iso *a = &arg->start_iso;
1166
1167 BUILD_BUG_ON(
1168 FW_CDEV_ISO_CONTEXT_MATCH_TAG0 != FW_ISO_CONTEXT_MATCH_TAG0 ||
1169 FW_CDEV_ISO_CONTEXT_MATCH_TAG1 != FW_ISO_CONTEXT_MATCH_TAG1 ||
1170 FW_CDEV_ISO_CONTEXT_MATCH_TAG2 != FW_ISO_CONTEXT_MATCH_TAG2 ||
1171 FW_CDEV_ISO_CONTEXT_MATCH_TAG3 != FW_ISO_CONTEXT_MATCH_TAG3 ||
1172 FW_CDEV_ISO_CONTEXT_MATCH_ALL_TAGS != FW_ISO_CONTEXT_MATCH_ALL_TAGS);
1173
1174 if (client->iso_context == NULL || a->handle != 0)
1175 return -EINVAL;
1176
1177 if (client->iso_context->type == FW_ISO_CONTEXT_RECEIVE &&
1178 (a->tags == 0 || a->tags > 15 || a->sync > 15))
1179 return -EINVAL;
1180
1181 return fw_iso_context_start(client->iso_context,
1182 a->cycle, a->sync, a->tags);
1183}
1184
1185static int ioctl_stop_iso(struct client *client, union ioctl_arg *arg)
1186{
1187 struct fw_cdev_stop_iso *a = &arg->stop_iso;
1188
1189 if (client->iso_context == NULL || a->handle != 0)
1190 return -EINVAL;
1191
1192 return fw_iso_context_stop(client->iso_context);
1193}
1194
1195static int ioctl_flush_iso(struct client *client, union ioctl_arg *arg)
1196{
1197 struct fw_cdev_flush_iso *a = &arg->flush_iso;
1198
1199 if (client->iso_context == NULL || a->handle != 0)
1200 return -EINVAL;
1201
1202 return fw_iso_context_flush_completions(client->iso_context);
1203}
1204
1205static int ioctl_get_cycle_timer2(struct client *client, union ioctl_arg *arg)
1206{
1207 struct fw_cdev_get_cycle_timer2 *a = &arg->get_cycle_timer2;
1208 struct fw_card *card = client->device->card;
1209 struct timespec ts = {0, 0};
1210 u32 cycle_time;
1211 int ret = 0;
1212
1213 local_irq_disable();
1214
1215 cycle_time = card->driver->read_csr(card, CSR_CYCLE_TIME);
1216
1217 switch (a->clk_id) {
1218 case CLOCK_REALTIME: getnstimeofday(&ts); break;
1219 case CLOCK_MONOTONIC: do_posix_clock_monotonic_gettime(&ts); break;
1220 case CLOCK_MONOTONIC_RAW: getrawmonotonic(&ts); break;
1221 default:
1222 ret = -EINVAL;
1223 }
1224
1225 local_irq_enable();
1226
1227 a->tv_sec = ts.tv_sec;
1228 a->tv_nsec = ts.tv_nsec;
1229 a->cycle_timer = cycle_time;
1230
1231 return ret;
1232}
1233
1234static int ioctl_get_cycle_timer(struct client *client, union ioctl_arg *arg)
1235{
1236 struct fw_cdev_get_cycle_timer *a = &arg->get_cycle_timer;
1237 struct fw_cdev_get_cycle_timer2 ct2;
1238
1239 ct2.clk_id = CLOCK_REALTIME;
1240 ioctl_get_cycle_timer2(client, (union ioctl_arg *)&ct2);
1241
1242 a->local_time = ct2.tv_sec * USEC_PER_SEC + ct2.tv_nsec / NSEC_PER_USEC;
1243 a->cycle_timer = ct2.cycle_timer;
1244
1245 return 0;
1246}
1247
1248static void iso_resource_work(struct work_struct *work)
1249{
1250 struct iso_resource_event *e;
1251 struct iso_resource *r =
1252 container_of(work, struct iso_resource, work.work);
1253 struct client *client = r->client;
1254 int generation, channel, bandwidth, todo;
1255 bool skip, free, success;
1256
1257 spin_lock_irq(&client->lock);
1258 generation = client->device->generation;
1259 todo = r->todo;
1260 /* Allow 1000ms grace period for other reallocations. */
1261 if (todo == ISO_RES_ALLOC &&
1262 time_before64(get_jiffies_64(),
1263 client->device->card->reset_jiffies + HZ)) {
1264 schedule_iso_resource(r, DIV_ROUND_UP(HZ, 3));
1265 skip = true;
1266 } else {
1267 /* We could be called twice within the same generation. */
1268 skip = todo == ISO_RES_REALLOC &&
1269 r->generation == generation;
1270 }
1271 free = todo == ISO_RES_DEALLOC ||
1272 todo == ISO_RES_ALLOC_ONCE ||
1273 todo == ISO_RES_DEALLOC_ONCE;
1274 r->generation = generation;
1275 spin_unlock_irq(&client->lock);
1276
1277 if (skip)
1278 goto out;
1279
1280 bandwidth = r->bandwidth;
1281
1282 fw_iso_resource_manage(client->device->card, generation,
1283 r->channels, &channel, &bandwidth,
1284 todo == ISO_RES_ALLOC ||
1285 todo == ISO_RES_REALLOC ||
1286 todo == ISO_RES_ALLOC_ONCE);
1287 /*
1288 * Is this generation outdated already? As long as this resource sticks
1289 * in the idr, it will be scheduled again for a newer generation or at
1290 * shutdown.
1291 */
1292 if (channel == -EAGAIN &&
1293 (todo == ISO_RES_ALLOC || todo == ISO_RES_REALLOC))
1294 goto out;
1295
1296 success = channel >= 0 || bandwidth > 0;
1297
1298 spin_lock_irq(&client->lock);
1299 /*
1300 * Transit from allocation to reallocation, except if the client
1301 * requested deallocation in the meantime.
1302 */
1303 if (r->todo == ISO_RES_ALLOC)
1304 r->todo = ISO_RES_REALLOC;
1305 /*
1306 * Allocation or reallocation failure? Pull this resource out of the
1307 * idr and prepare for deletion, unless the client is shutting down.
1308 */
1309 if (r->todo == ISO_RES_REALLOC && !success &&
1310 !client->in_shutdown &&
1311 idr_find(&client->resource_idr, r->resource.handle)) {
1312 idr_remove(&client->resource_idr, r->resource.handle);
1313 client_put(client);
1314 free = true;
1315 }
1316 spin_unlock_irq(&client->lock);
1317
1318 if (todo == ISO_RES_ALLOC && channel >= 0)
1319 r->channels = 1ULL << channel;
1320
1321 if (todo == ISO_RES_REALLOC && success)
1322 goto out;
1323
1324 if (todo == ISO_RES_ALLOC || todo == ISO_RES_ALLOC_ONCE) {
1325 e = r->e_alloc;
1326 r->e_alloc = NULL;
1327 } else {
1328 e = r->e_dealloc;
1329 r->e_dealloc = NULL;
1330 }
1331 e->iso_resource.handle = r->resource.handle;
1332 e->iso_resource.channel = channel;
1333 e->iso_resource.bandwidth = bandwidth;
1334
1335 queue_event(client, &e->event,
1336 &e->iso_resource, sizeof(e->iso_resource), NULL, 0);
1337
1338 if (free) {
1339 cancel_delayed_work(&r->work);
1340 kfree(r->e_alloc);
1341 kfree(r->e_dealloc);
1342 kfree(r);
1343 }
1344 out:
1345 client_put(client);
1346}
1347
1348static void release_iso_resource(struct client *client,
1349 struct client_resource *resource)
1350{
1351 struct iso_resource *r =
1352 container_of(resource, struct iso_resource, resource);
1353
1354 spin_lock_irq(&client->lock);
1355 r->todo = ISO_RES_DEALLOC;
1356 schedule_iso_resource(r, 0);
1357 spin_unlock_irq(&client->lock);
1358}
1359
1360static int init_iso_resource(struct client *client,
1361 struct fw_cdev_allocate_iso_resource *request, int todo)
1362{
1363 struct iso_resource_event *e1, *e2;
1364 struct iso_resource *r;
1365 int ret;
1366
1367 if ((request->channels == 0 && request->bandwidth == 0) ||
1368 request->bandwidth > BANDWIDTH_AVAILABLE_INITIAL ||
1369 request->bandwidth < 0)
1370 return -EINVAL;
1371
1372 r = kmalloc(sizeof(*r), GFP_KERNEL);
1373 e1 = kmalloc(sizeof(*e1), GFP_KERNEL);
1374 e2 = kmalloc(sizeof(*e2), GFP_KERNEL);
1375 if (r == NULL || e1 == NULL || e2 == NULL) {
1376 ret = -ENOMEM;
1377 goto fail;
1378 }
1379
1380 INIT_DELAYED_WORK(&r->work, iso_resource_work);
1381 r->client = client;
1382 r->todo = todo;
1383 r->generation = -1;
1384 r->channels = request->channels;
1385 r->bandwidth = request->bandwidth;
1386 r->e_alloc = e1;
1387 r->e_dealloc = e2;
1388
1389 e1->iso_resource.closure = request->closure;
1390 e1->iso_resource.type = FW_CDEV_EVENT_ISO_RESOURCE_ALLOCATED;
1391 e2->iso_resource.closure = request->closure;
1392 e2->iso_resource.type = FW_CDEV_EVENT_ISO_RESOURCE_DEALLOCATED;
1393
1394 if (todo == ISO_RES_ALLOC) {
1395 r->resource.release = release_iso_resource;
1396 ret = add_client_resource(client, &r->resource, GFP_KERNEL);
1397 if (ret < 0)
1398 goto fail;
1399 } else {
1400 r->resource.release = NULL;
1401 r->resource.handle = -1;
1402 schedule_iso_resource(r, 0);
1403 }
1404 request->handle = r->resource.handle;
1405
1406 return 0;
1407 fail:
1408 kfree(r);
1409 kfree(e1);
1410 kfree(e2);
1411
1412 return ret;
1413}
1414
1415static int ioctl_allocate_iso_resource(struct client *client,
1416 union ioctl_arg *arg)
1417{
1418 return init_iso_resource(client,
1419 &arg->allocate_iso_resource, ISO_RES_ALLOC);
1420}
1421
1422static int ioctl_deallocate_iso_resource(struct client *client,
1423 union ioctl_arg *arg)
1424{
1425 return release_client_resource(client,
1426 arg->deallocate.handle, release_iso_resource, NULL);
1427}
1428
1429static int ioctl_allocate_iso_resource_once(struct client *client,
1430 union ioctl_arg *arg)
1431{
1432 return init_iso_resource(client,
1433 &arg->allocate_iso_resource, ISO_RES_ALLOC_ONCE);
1434}
1435
1436static int ioctl_deallocate_iso_resource_once(struct client *client,
1437 union ioctl_arg *arg)
1438{
1439 return init_iso_resource(client,
1440 &arg->allocate_iso_resource, ISO_RES_DEALLOC_ONCE);
1441}
1442
1443/*
1444 * Returns a speed code: Maximum speed to or from this device,
1445 * limited by the device's link speed, the local node's link speed,
1446 * and all PHY port speeds between the two links.
1447 */
1448static int ioctl_get_speed(struct client *client, union ioctl_arg *arg)
1449{
1450 return client->device->max_speed;
1451}
1452
1453static int ioctl_send_broadcast_request(struct client *client,
1454 union ioctl_arg *arg)
1455{
1456 struct fw_cdev_send_request *a = &arg->send_request;
1457
1458 switch (a->tcode) {
1459 case TCODE_WRITE_QUADLET_REQUEST:
1460 case TCODE_WRITE_BLOCK_REQUEST:
1461 break;
1462 default:
1463 return -EINVAL;
1464 }
1465
1466 /* Security policy: Only allow accesses to Units Space. */
1467 if (a->offset < CSR_REGISTER_BASE + CSR_CONFIG_ROM_END)
1468 return -EACCES;
1469
1470 return init_request(client, a, LOCAL_BUS | 0x3f, SCODE_100);
1471}
1472
1473static int ioctl_send_stream_packet(struct client *client, union ioctl_arg *arg)
1474{
1475 struct fw_cdev_send_stream_packet *a = &arg->send_stream_packet;
1476 struct fw_cdev_send_request request;
1477 int dest;
1478
1479 if (a->speed > client->device->card->link_speed ||
1480 a->length > 1024 << a->speed)
1481 return -EIO;
1482
1483 if (a->tag > 3 || a->channel > 63 || a->sy > 15)
1484 return -EINVAL;
1485
1486 dest = fw_stream_packet_destination_id(a->tag, a->channel, a->sy);
1487 request.tcode = TCODE_STREAM_DATA;
1488 request.length = a->length;
1489 request.closure = a->closure;
1490 request.data = a->data;
1491 request.generation = a->generation;
1492
1493 return init_request(client, &request, dest, a->speed);
1494}
1495
1496static void outbound_phy_packet_callback(struct fw_packet *packet,
1497 struct fw_card *card, int status)
1498{
1499 struct outbound_phy_packet_event *e =
1500 container_of(packet, struct outbound_phy_packet_event, p);
1501
1502 switch (status) {
1503 /* expected: */
1504 case ACK_COMPLETE: e->phy_packet.rcode = RCODE_COMPLETE; break;
1505 /* should never happen with PHY packets: */
1506 case ACK_PENDING: e->phy_packet.rcode = RCODE_COMPLETE; break;
1507 case ACK_BUSY_X:
1508 case ACK_BUSY_A:
1509 case ACK_BUSY_B: e->phy_packet.rcode = RCODE_BUSY; break;
1510 case ACK_DATA_ERROR: e->phy_packet.rcode = RCODE_DATA_ERROR; break;
1511 case ACK_TYPE_ERROR: e->phy_packet.rcode = RCODE_TYPE_ERROR; break;
1512 /* stale generation; cancelled; on certain controllers: no ack */
1513 default: e->phy_packet.rcode = status; break;
1514 }
1515 e->phy_packet.data[0] = packet->timestamp;
1516
1517 queue_event(e->client, &e->event, &e->phy_packet,
1518 sizeof(e->phy_packet) + e->phy_packet.length, NULL, 0);
1519 client_put(e->client);
1520}
1521
1522static int ioctl_send_phy_packet(struct client *client, union ioctl_arg *arg)
1523{
1524 struct fw_cdev_send_phy_packet *a = &arg->send_phy_packet;
1525 struct fw_card *card = client->device->card;
1526 struct outbound_phy_packet_event *e;
1527
1528 /* Access policy: Allow this ioctl only on local nodes' device files. */
1529 if (!client->device->is_local)
1530 return -ENOSYS;
1531
1532 e = kzalloc(sizeof(*e) + 4, GFP_KERNEL);
1533 if (e == NULL)
1534 return -ENOMEM;
1535
1536 client_get(client);
1537 e->client = client;
1538 e->p.speed = SCODE_100;
1539 e->p.generation = a->generation;
1540 e->p.header[0] = TCODE_LINK_INTERNAL << 4;
1541 e->p.header[1] = a->data[0];
1542 e->p.header[2] = a->data[1];
1543 e->p.header_length = 12;
1544 e->p.callback = outbound_phy_packet_callback;
1545 e->phy_packet.closure = a->closure;
1546 e->phy_packet.type = FW_CDEV_EVENT_PHY_PACKET_SENT;
1547 if (is_ping_packet(a->data))
1548 e->phy_packet.length = 4;
1549
1550 card->driver->send_request(card, &e->p);
1551
1552 return 0;
1553}
1554
1555static int ioctl_receive_phy_packets(struct client *client, union ioctl_arg *arg)
1556{
1557 struct fw_cdev_receive_phy_packets *a = &arg->receive_phy_packets;
1558 struct fw_card *card = client->device->card;
1559
1560 /* Access policy: Allow this ioctl only on local nodes' device files. */
1561 if (!client->device->is_local)
1562 return -ENOSYS;
1563
1564 spin_lock_irq(&card->lock);
1565
1566 list_move_tail(&client->phy_receiver_link, &card->phy_receiver_list);
1567 client->phy_receiver_closure = a->closure;
1568
1569 spin_unlock_irq(&card->lock);
1570
1571 return 0;
1572}
1573
1574void fw_cdev_handle_phy_packet(struct fw_card *card, struct fw_packet *p)
1575{
1576 struct client *client;
1577 struct inbound_phy_packet_event *e;
1578 unsigned long flags;
1579
1580 spin_lock_irqsave(&card->lock, flags);
1581
1582 list_for_each_entry(client, &card->phy_receiver_list, phy_receiver_link) {
1583 e = kmalloc(sizeof(*e) + 8, GFP_ATOMIC);
1584 if (e == NULL) {
1585 fw_notice(card, "out of memory when allocating event\n");
1586 break;
1587 }
1588 e->phy_packet.closure = client->phy_receiver_closure;
1589 e->phy_packet.type = FW_CDEV_EVENT_PHY_PACKET_RECEIVED;
1590 e->phy_packet.rcode = RCODE_COMPLETE;
1591 e->phy_packet.length = 8;
1592 e->phy_packet.data[0] = p->header[1];
1593 e->phy_packet.data[1] = p->header[2];
1594 queue_event(client, &e->event,
1595 &e->phy_packet, sizeof(e->phy_packet) + 8, NULL, 0);
1596 }
1597
1598 spin_unlock_irqrestore(&card->lock, flags);
1599}
1600
1601static int (* const ioctl_handlers[])(struct client *, union ioctl_arg *) = {
1602 [0x00] = ioctl_get_info,
1603 [0x01] = ioctl_send_request,
1604 [0x02] = ioctl_allocate,
1605 [0x03] = ioctl_deallocate,
1606 [0x04] = ioctl_send_response,
1607 [0x05] = ioctl_initiate_bus_reset,
1608 [0x06] = ioctl_add_descriptor,
1609 [0x07] = ioctl_remove_descriptor,
1610 [0x08] = ioctl_create_iso_context,
1611 [0x09] = ioctl_queue_iso,
1612 [0x0a] = ioctl_start_iso,
1613 [0x0b] = ioctl_stop_iso,
1614 [0x0c] = ioctl_get_cycle_timer,
1615 [0x0d] = ioctl_allocate_iso_resource,
1616 [0x0e] = ioctl_deallocate_iso_resource,
1617 [0x0f] = ioctl_allocate_iso_resource_once,
1618 [0x10] = ioctl_deallocate_iso_resource_once,
1619 [0x11] = ioctl_get_speed,
1620 [0x12] = ioctl_send_broadcast_request,
1621 [0x13] = ioctl_send_stream_packet,
1622 [0x14] = ioctl_get_cycle_timer2,
1623 [0x15] = ioctl_send_phy_packet,
1624 [0x16] = ioctl_receive_phy_packets,
1625 [0x17] = ioctl_set_iso_channels,
1626 [0x18] = ioctl_flush_iso,
1627};
1628
1629static int dispatch_ioctl(struct client *client,
1630 unsigned int cmd, void __user *arg)
1631{
1632 union ioctl_arg buffer;
1633 int ret;
1634
1635 if (fw_device_is_shutdown(client->device))
1636 return -ENODEV;
1637
1638 if (_IOC_TYPE(cmd) != '#' ||
1639 _IOC_NR(cmd) >= ARRAY_SIZE(ioctl_handlers) ||
1640 _IOC_SIZE(cmd) > sizeof(buffer))
1641 return -ENOTTY;
1642
1643 if (_IOC_DIR(cmd) == _IOC_READ)
1644 memset(&buffer, 0, _IOC_SIZE(cmd));
1645
1646 if (_IOC_DIR(cmd) & _IOC_WRITE)
1647 if (copy_from_user(&buffer, arg, _IOC_SIZE(cmd)))
1648 return -EFAULT;
1649
1650 ret = ioctl_handlers[_IOC_NR(cmd)](client, &buffer);
1651 if (ret < 0)
1652 return ret;
1653
1654 if (_IOC_DIR(cmd) & _IOC_READ)
1655 if (copy_to_user(arg, &buffer, _IOC_SIZE(cmd)))
1656 return -EFAULT;
1657
1658 return ret;
1659}
1660
1661static long fw_device_op_ioctl(struct file *file,
1662 unsigned int cmd, unsigned long arg)
1663{
1664 return dispatch_ioctl(file->private_data, cmd, (void __user *)arg);
1665}
1666
1667#ifdef CONFIG_COMPAT
1668static long fw_device_op_compat_ioctl(struct file *file,
1669 unsigned int cmd, unsigned long arg)
1670{
1671 return dispatch_ioctl(file->private_data, cmd, compat_ptr(arg));
1672}
1673#endif
1674
1675static int fw_device_op_mmap(struct file *file, struct vm_area_struct *vma)
1676{
1677 struct client *client = file->private_data;
1678 unsigned long size;
1679 int page_count, ret;
1680
1681 if (fw_device_is_shutdown(client->device))
1682 return -ENODEV;
1683
1684 /* FIXME: We could support multiple buffers, but we don't. */
1685 if (client->buffer.pages != NULL)
1686 return -EBUSY;
1687
1688 if (!(vma->vm_flags & VM_SHARED))
1689 return -EINVAL;
1690
1691 if (vma->vm_start & ~PAGE_MASK)
1692 return -EINVAL;
1693
1694 client->vm_start = vma->vm_start;
1695 size = vma->vm_end - vma->vm_start;
1696 page_count = size >> PAGE_SHIFT;
1697 if (size & ~PAGE_MASK)
1698 return -EINVAL;
1699
1700 ret = fw_iso_buffer_alloc(&client->buffer, page_count);
1701 if (ret < 0)
1702 return ret;
1703
1704 spin_lock_irq(&client->lock);
1705 if (client->iso_context) {
1706 ret = fw_iso_buffer_map_dma(&client->buffer,
1707 client->device->card,
1708 iso_dma_direction(client->iso_context));
1709 client->buffer_is_mapped = (ret == 0);
1710 }
1711 spin_unlock_irq(&client->lock);
1712 if (ret < 0)
1713 goto fail;
1714
1715 ret = fw_iso_buffer_map_vma(&client->buffer, vma);
1716 if (ret < 0)
1717 goto fail;
1718
1719 return 0;
1720 fail:
1721 fw_iso_buffer_destroy(&client->buffer, client->device->card);
1722 return ret;
1723}
1724
1725static int is_outbound_transaction_resource(int id, void *p, void *data)
1726{
1727 struct client_resource *resource = p;
1728
1729 return resource->release == release_transaction;
1730}
1731
1732static int has_outbound_transactions(struct client *client)
1733{
1734 int ret;
1735
1736 spin_lock_irq(&client->lock);
1737 ret = idr_for_each(&client->resource_idr,
1738 is_outbound_transaction_resource, NULL);
1739 spin_unlock_irq(&client->lock);
1740
1741 return ret;
1742}
1743
1744static int shutdown_resource(int id, void *p, void *data)
1745{
1746 struct client_resource *resource = p;
1747 struct client *client = data;
1748
1749 resource->release(client, resource);
1750 client_put(client);
1751
1752 return 0;
1753}
1754
1755static int fw_device_op_release(struct inode *inode, struct file *file)
1756{
1757 struct client *client = file->private_data;
1758 struct event *event, *next_event;
1759
1760 spin_lock_irq(&client->device->card->lock);
1761 list_del(&client->phy_receiver_link);
1762 spin_unlock_irq(&client->device->card->lock);
1763
1764 mutex_lock(&client->device->client_list_mutex);
1765 list_del(&client->link);
1766 mutex_unlock(&client->device->client_list_mutex);
1767
1768 if (client->iso_context)
1769 fw_iso_context_destroy(client->iso_context);
1770
1771 if (client->buffer.pages)
1772 fw_iso_buffer_destroy(&client->buffer, client->device->card);
1773
1774 /* Freeze client->resource_idr and client->event_list */
1775 spin_lock_irq(&client->lock);
1776 client->in_shutdown = true;
1777 spin_unlock_irq(&client->lock);
1778
1779 wait_event(client->tx_flush_wait, !has_outbound_transactions(client));
1780
1781 idr_for_each(&client->resource_idr, shutdown_resource, client);
1782 idr_remove_all(&client->resource_idr);
1783 idr_destroy(&client->resource_idr);
1784
1785 list_for_each_entry_safe(event, next_event, &client->event_list, link)
1786 kfree(event);
1787
1788 client_put(client);
1789
1790 return 0;
1791}
1792
1793static unsigned int fw_device_op_poll(struct file *file, poll_table * pt)
1794{
1795 struct client *client = file->private_data;
1796 unsigned int mask = 0;
1797
1798 poll_wait(file, &client->wait, pt);
1799
1800 if (fw_device_is_shutdown(client->device))
1801 mask |= POLLHUP | POLLERR;
1802 if (!list_empty(&client->event_list))
1803 mask |= POLLIN | POLLRDNORM;
1804
1805 return mask;
1806}
1807
1808const struct file_operations fw_device_ops = {
1809 .owner = THIS_MODULE,
1810 .llseek = no_llseek,
1811 .open = fw_device_op_open,
1812 .read = fw_device_op_read,
1813 .unlocked_ioctl = fw_device_op_ioctl,
1814 .mmap = fw_device_op_mmap,
1815 .release = fw_device_op_release,
1816 .poll = fw_device_op_poll,
1817#ifdef CONFIG_COMPAT
1818 .compat_ioctl = fw_device_op_compat_ioctl,
1819#endif
1820};
1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * Char device for device raw access
4 *
5 * Copyright (C) 2005-2007 Kristian Hoegsberg <krh@bitplanet.net>
6 */
7
8#include <linux/bug.h>
9#include <linux/compat.h>
10#include <linux/delay.h>
11#include <linux/device.h>
12#include <linux/dma-mapping.h>
13#include <linux/errno.h>
14#include <linux/firewire.h>
15#include <linux/firewire-cdev.h>
16#include <linux/idr.h>
17#include <linux/irqflags.h>
18#include <linux/jiffies.h>
19#include <linux/kernel.h>
20#include <linux/kref.h>
21#include <linux/mm.h>
22#include <linux/module.h>
23#include <linux/mutex.h>
24#include <linux/poll.h>
25#include <linux/sched.h> /* required for linux/wait.h */
26#include <linux/slab.h>
27#include <linux/spinlock.h>
28#include <linux/string.h>
29#include <linux/time.h>
30#include <linux/uaccess.h>
31#include <linux/vmalloc.h>
32#include <linux/wait.h>
33#include <linux/workqueue.h>
34
35
36#include "core.h"
37
38/*
39 * ABI version history is documented in linux/firewire-cdev.h.
40 */
41#define FW_CDEV_KERNEL_VERSION 5
42#define FW_CDEV_VERSION_EVENT_REQUEST2 4
43#define FW_CDEV_VERSION_ALLOCATE_REGION_END 4
44#define FW_CDEV_VERSION_AUTO_FLUSH_ISO_OVERFLOW 5
45
46struct client {
47 u32 version;
48 struct fw_device *device;
49
50 spinlock_t lock;
51 bool in_shutdown;
52 struct idr resource_idr;
53 struct list_head event_list;
54 wait_queue_head_t wait;
55 wait_queue_head_t tx_flush_wait;
56 u64 bus_reset_closure;
57
58 struct fw_iso_context *iso_context;
59 u64 iso_closure;
60 struct fw_iso_buffer buffer;
61 unsigned long vm_start;
62 bool buffer_is_mapped;
63
64 struct list_head phy_receiver_link;
65 u64 phy_receiver_closure;
66
67 struct list_head link;
68 struct kref kref;
69};
70
71static inline void client_get(struct client *client)
72{
73 kref_get(&client->kref);
74}
75
76static void client_release(struct kref *kref)
77{
78 struct client *client = container_of(kref, struct client, kref);
79
80 fw_device_put(client->device);
81 kfree(client);
82}
83
84static void client_put(struct client *client)
85{
86 kref_put(&client->kref, client_release);
87}
88
89struct client_resource;
90typedef void (*client_resource_release_fn_t)(struct client *,
91 struct client_resource *);
92struct client_resource {
93 client_resource_release_fn_t release;
94 int handle;
95};
96
97struct address_handler_resource {
98 struct client_resource resource;
99 struct fw_address_handler handler;
100 __u64 closure;
101 struct client *client;
102};
103
104struct outbound_transaction_resource {
105 struct client_resource resource;
106 struct fw_transaction transaction;
107};
108
109struct inbound_transaction_resource {
110 struct client_resource resource;
111 struct fw_card *card;
112 struct fw_request *request;
113 void *data;
114 size_t length;
115};
116
117struct descriptor_resource {
118 struct client_resource resource;
119 struct fw_descriptor descriptor;
120 u32 data[];
121};
122
123struct iso_resource {
124 struct client_resource resource;
125 struct client *client;
126 /* Schedule work and access todo only with client->lock held. */
127 struct delayed_work work;
128 enum {ISO_RES_ALLOC, ISO_RES_REALLOC, ISO_RES_DEALLOC,
129 ISO_RES_ALLOC_ONCE, ISO_RES_DEALLOC_ONCE,} todo;
130 int generation;
131 u64 channels;
132 s32 bandwidth;
133 struct iso_resource_event *e_alloc, *e_dealloc;
134};
135
136static void release_iso_resource(struct client *, struct client_resource *);
137
138static void schedule_iso_resource(struct iso_resource *r, unsigned long delay)
139{
140 client_get(r->client);
141 if (!queue_delayed_work(fw_workqueue, &r->work, delay))
142 client_put(r->client);
143}
144
145static void schedule_if_iso_resource(struct client_resource *resource)
146{
147 if (resource->release == release_iso_resource)
148 schedule_iso_resource(container_of(resource,
149 struct iso_resource, resource), 0);
150}
151
152/*
153 * dequeue_event() just kfree()'s the event, so the event has to be
154 * the first field in a struct XYZ_event.
155 */
156struct event {
157 struct { void *data; size_t size; } v[2];
158 struct list_head link;
159};
160
161struct bus_reset_event {
162 struct event event;
163 struct fw_cdev_event_bus_reset reset;
164};
165
166struct outbound_transaction_event {
167 struct event event;
168 struct client *client;
169 struct outbound_transaction_resource r;
170 struct fw_cdev_event_response response;
171};
172
173struct inbound_transaction_event {
174 struct event event;
175 union {
176 struct fw_cdev_event_request request;
177 struct fw_cdev_event_request2 request2;
178 } req;
179};
180
181struct iso_interrupt_event {
182 struct event event;
183 struct fw_cdev_event_iso_interrupt interrupt;
184};
185
186struct iso_interrupt_mc_event {
187 struct event event;
188 struct fw_cdev_event_iso_interrupt_mc interrupt;
189};
190
191struct iso_resource_event {
192 struct event event;
193 struct fw_cdev_event_iso_resource iso_resource;
194};
195
196struct outbound_phy_packet_event {
197 struct event event;
198 struct client *client;
199 struct fw_packet p;
200 struct fw_cdev_event_phy_packet phy_packet;
201};
202
203struct inbound_phy_packet_event {
204 struct event event;
205 struct fw_cdev_event_phy_packet phy_packet;
206};
207
208#ifdef CONFIG_COMPAT
209static void __user *u64_to_uptr(u64 value)
210{
211 if (in_compat_syscall())
212 return compat_ptr(value);
213 else
214 return (void __user *)(unsigned long)value;
215}
216
217static u64 uptr_to_u64(void __user *ptr)
218{
219 if (in_compat_syscall())
220 return ptr_to_compat(ptr);
221 else
222 return (u64)(unsigned long)ptr;
223}
224#else
225static inline void __user *u64_to_uptr(u64 value)
226{
227 return (void __user *)(unsigned long)value;
228}
229
230static inline u64 uptr_to_u64(void __user *ptr)
231{
232 return (u64)(unsigned long)ptr;
233}
234#endif /* CONFIG_COMPAT */
235
236static int fw_device_op_open(struct inode *inode, struct file *file)
237{
238 struct fw_device *device;
239 struct client *client;
240
241 device = fw_device_get_by_devt(inode->i_rdev);
242 if (device == NULL)
243 return -ENODEV;
244
245 if (fw_device_is_shutdown(device)) {
246 fw_device_put(device);
247 return -ENODEV;
248 }
249
250 client = kzalloc(sizeof(*client), GFP_KERNEL);
251 if (client == NULL) {
252 fw_device_put(device);
253 return -ENOMEM;
254 }
255
256 client->device = device;
257 spin_lock_init(&client->lock);
258 idr_init(&client->resource_idr);
259 INIT_LIST_HEAD(&client->event_list);
260 init_waitqueue_head(&client->wait);
261 init_waitqueue_head(&client->tx_flush_wait);
262 INIT_LIST_HEAD(&client->phy_receiver_link);
263 INIT_LIST_HEAD(&client->link);
264 kref_init(&client->kref);
265
266 file->private_data = client;
267
268 return nonseekable_open(inode, file);
269}
270
271static void queue_event(struct client *client, struct event *event,
272 void *data0, size_t size0, void *data1, size_t size1)
273{
274 unsigned long flags;
275
276 event->v[0].data = data0;
277 event->v[0].size = size0;
278 event->v[1].data = data1;
279 event->v[1].size = size1;
280
281 spin_lock_irqsave(&client->lock, flags);
282 if (client->in_shutdown)
283 kfree(event);
284 else
285 list_add_tail(&event->link, &client->event_list);
286 spin_unlock_irqrestore(&client->lock, flags);
287
288 wake_up_interruptible(&client->wait);
289}
290
291static int dequeue_event(struct client *client,
292 char __user *buffer, size_t count)
293{
294 struct event *event;
295 size_t size, total;
296 int i, ret;
297
298 ret = wait_event_interruptible(client->wait,
299 !list_empty(&client->event_list) ||
300 fw_device_is_shutdown(client->device));
301 if (ret < 0)
302 return ret;
303
304 if (list_empty(&client->event_list) &&
305 fw_device_is_shutdown(client->device))
306 return -ENODEV;
307
308 spin_lock_irq(&client->lock);
309 event = list_first_entry(&client->event_list, struct event, link);
310 list_del(&event->link);
311 spin_unlock_irq(&client->lock);
312
313 total = 0;
314 for (i = 0; i < ARRAY_SIZE(event->v) && total < count; i++) {
315 size = min(event->v[i].size, count - total);
316 if (copy_to_user(buffer + total, event->v[i].data, size)) {
317 ret = -EFAULT;
318 goto out;
319 }
320 total += size;
321 }
322 ret = total;
323
324 out:
325 kfree(event);
326
327 return ret;
328}
329
330static ssize_t fw_device_op_read(struct file *file, char __user *buffer,
331 size_t count, loff_t *offset)
332{
333 struct client *client = file->private_data;
334
335 return dequeue_event(client, buffer, count);
336}
337
338static void fill_bus_reset_event(struct fw_cdev_event_bus_reset *event,
339 struct client *client)
340{
341 struct fw_card *card = client->device->card;
342
343 spin_lock_irq(&card->lock);
344
345 event->closure = client->bus_reset_closure;
346 event->type = FW_CDEV_EVENT_BUS_RESET;
347 event->generation = client->device->generation;
348 event->node_id = client->device->node_id;
349 event->local_node_id = card->local_node->node_id;
350 event->bm_node_id = card->bm_node_id;
351 event->irm_node_id = card->irm_node->node_id;
352 event->root_node_id = card->root_node->node_id;
353
354 spin_unlock_irq(&card->lock);
355}
356
357static void for_each_client(struct fw_device *device,
358 void (*callback)(struct client *client))
359{
360 struct client *c;
361
362 mutex_lock(&device->client_list_mutex);
363 list_for_each_entry(c, &device->client_list, link)
364 callback(c);
365 mutex_unlock(&device->client_list_mutex);
366}
367
368static int schedule_reallocations(int id, void *p, void *data)
369{
370 schedule_if_iso_resource(p);
371
372 return 0;
373}
374
375static void queue_bus_reset_event(struct client *client)
376{
377 struct bus_reset_event *e;
378
379 e = kzalloc(sizeof(*e), GFP_KERNEL);
380 if (e == NULL)
381 return;
382
383 fill_bus_reset_event(&e->reset, client);
384
385 queue_event(client, &e->event,
386 &e->reset, sizeof(e->reset), NULL, 0);
387
388 spin_lock_irq(&client->lock);
389 idr_for_each(&client->resource_idr, schedule_reallocations, client);
390 spin_unlock_irq(&client->lock);
391}
392
393void fw_device_cdev_update(struct fw_device *device)
394{
395 for_each_client(device, queue_bus_reset_event);
396}
397
398static void wake_up_client(struct client *client)
399{
400 wake_up_interruptible(&client->wait);
401}
402
403void fw_device_cdev_remove(struct fw_device *device)
404{
405 for_each_client(device, wake_up_client);
406}
407
408union ioctl_arg {
409 struct fw_cdev_get_info get_info;
410 struct fw_cdev_send_request send_request;
411 struct fw_cdev_allocate allocate;
412 struct fw_cdev_deallocate deallocate;
413 struct fw_cdev_send_response send_response;
414 struct fw_cdev_initiate_bus_reset initiate_bus_reset;
415 struct fw_cdev_add_descriptor add_descriptor;
416 struct fw_cdev_remove_descriptor remove_descriptor;
417 struct fw_cdev_create_iso_context create_iso_context;
418 struct fw_cdev_queue_iso queue_iso;
419 struct fw_cdev_start_iso start_iso;
420 struct fw_cdev_stop_iso stop_iso;
421 struct fw_cdev_get_cycle_timer get_cycle_timer;
422 struct fw_cdev_allocate_iso_resource allocate_iso_resource;
423 struct fw_cdev_send_stream_packet send_stream_packet;
424 struct fw_cdev_get_cycle_timer2 get_cycle_timer2;
425 struct fw_cdev_send_phy_packet send_phy_packet;
426 struct fw_cdev_receive_phy_packets receive_phy_packets;
427 struct fw_cdev_set_iso_channels set_iso_channels;
428 struct fw_cdev_flush_iso flush_iso;
429};
430
431static int ioctl_get_info(struct client *client, union ioctl_arg *arg)
432{
433 struct fw_cdev_get_info *a = &arg->get_info;
434 struct fw_cdev_event_bus_reset bus_reset;
435 unsigned long ret = 0;
436
437 client->version = a->version;
438 a->version = FW_CDEV_KERNEL_VERSION;
439 a->card = client->device->card->index;
440
441 down_read(&fw_device_rwsem);
442
443 if (a->rom != 0) {
444 size_t want = a->rom_length;
445 size_t have = client->device->config_rom_length * 4;
446
447 ret = copy_to_user(u64_to_uptr(a->rom),
448 client->device->config_rom, min(want, have));
449 }
450 a->rom_length = client->device->config_rom_length * 4;
451
452 up_read(&fw_device_rwsem);
453
454 if (ret != 0)
455 return -EFAULT;
456
457 mutex_lock(&client->device->client_list_mutex);
458
459 client->bus_reset_closure = a->bus_reset_closure;
460 if (a->bus_reset != 0) {
461 fill_bus_reset_event(&bus_reset, client);
462 /* unaligned size of bus_reset is 36 bytes */
463 ret = copy_to_user(u64_to_uptr(a->bus_reset), &bus_reset, 36);
464 }
465 if (ret == 0 && list_empty(&client->link))
466 list_add_tail(&client->link, &client->device->client_list);
467
468 mutex_unlock(&client->device->client_list_mutex);
469
470 return ret ? -EFAULT : 0;
471}
472
473static int add_client_resource(struct client *client,
474 struct client_resource *resource, gfp_t gfp_mask)
475{
476 bool preload = gfpflags_allow_blocking(gfp_mask);
477 unsigned long flags;
478 int ret;
479
480 if (preload)
481 idr_preload(gfp_mask);
482 spin_lock_irqsave(&client->lock, flags);
483
484 if (client->in_shutdown)
485 ret = -ECANCELED;
486 else
487 ret = idr_alloc(&client->resource_idr, resource, 0, 0,
488 GFP_NOWAIT);
489 if (ret >= 0) {
490 resource->handle = ret;
491 client_get(client);
492 schedule_if_iso_resource(resource);
493 }
494
495 spin_unlock_irqrestore(&client->lock, flags);
496 if (preload)
497 idr_preload_end();
498
499 return ret < 0 ? ret : 0;
500}
501
502static int release_client_resource(struct client *client, u32 handle,
503 client_resource_release_fn_t release,
504 struct client_resource **return_resource)
505{
506 struct client_resource *resource;
507
508 spin_lock_irq(&client->lock);
509 if (client->in_shutdown)
510 resource = NULL;
511 else
512 resource = idr_find(&client->resource_idr, handle);
513 if (resource && resource->release == release)
514 idr_remove(&client->resource_idr, handle);
515 spin_unlock_irq(&client->lock);
516
517 if (!(resource && resource->release == release))
518 return -EINVAL;
519
520 if (return_resource)
521 *return_resource = resource;
522 else
523 resource->release(client, resource);
524
525 client_put(client);
526
527 return 0;
528}
529
530static void release_transaction(struct client *client,
531 struct client_resource *resource)
532{
533}
534
535static void complete_transaction(struct fw_card *card, int rcode,
536 void *payload, size_t length, void *data)
537{
538 struct outbound_transaction_event *e = data;
539 struct fw_cdev_event_response *rsp = &e->response;
540 struct client *client = e->client;
541 unsigned long flags;
542
543 if (length < rsp->length)
544 rsp->length = length;
545 if (rcode == RCODE_COMPLETE)
546 memcpy(rsp->data, payload, rsp->length);
547
548 spin_lock_irqsave(&client->lock, flags);
549 idr_remove(&client->resource_idr, e->r.resource.handle);
550 if (client->in_shutdown)
551 wake_up(&client->tx_flush_wait);
552 spin_unlock_irqrestore(&client->lock, flags);
553
554 rsp->type = FW_CDEV_EVENT_RESPONSE;
555 rsp->rcode = rcode;
556
557 /*
558 * In the case that sizeof(*rsp) doesn't align with the position of the
559 * data, and the read is short, preserve an extra copy of the data
560 * to stay compatible with a pre-2.6.27 bug. Since the bug is harmless
561 * for short reads and some apps depended on it, this is both safe
562 * and prudent for compatibility.
563 */
564 if (rsp->length <= sizeof(*rsp) - offsetof(typeof(*rsp), data))
565 queue_event(client, &e->event, rsp, sizeof(*rsp),
566 rsp->data, rsp->length);
567 else
568 queue_event(client, &e->event, rsp, sizeof(*rsp) + rsp->length,
569 NULL, 0);
570
571 /* Drop the idr's reference */
572 client_put(client);
573}
574
575static int init_request(struct client *client,
576 struct fw_cdev_send_request *request,
577 int destination_id, int speed)
578{
579 struct outbound_transaction_event *e;
580 int ret;
581
582 if (request->tcode != TCODE_STREAM_DATA &&
583 (request->length > 4096 || request->length > 512 << speed))
584 return -EIO;
585
586 if (request->tcode == TCODE_WRITE_QUADLET_REQUEST &&
587 request->length < 4)
588 return -EINVAL;
589
590 e = kmalloc(sizeof(*e) + request->length, GFP_KERNEL);
591 if (e == NULL)
592 return -ENOMEM;
593
594 e->client = client;
595 e->response.length = request->length;
596 e->response.closure = request->closure;
597
598 if (request->data &&
599 copy_from_user(e->response.data,
600 u64_to_uptr(request->data), request->length)) {
601 ret = -EFAULT;
602 goto failed;
603 }
604
605 e->r.resource.release = release_transaction;
606 ret = add_client_resource(client, &e->r.resource, GFP_KERNEL);
607 if (ret < 0)
608 goto failed;
609
610 fw_send_request(client->device->card, &e->r.transaction,
611 request->tcode, destination_id, request->generation,
612 speed, request->offset, e->response.data,
613 request->length, complete_transaction, e);
614 return 0;
615
616 failed:
617 kfree(e);
618
619 return ret;
620}
621
622static int ioctl_send_request(struct client *client, union ioctl_arg *arg)
623{
624 switch (arg->send_request.tcode) {
625 case TCODE_WRITE_QUADLET_REQUEST:
626 case TCODE_WRITE_BLOCK_REQUEST:
627 case TCODE_READ_QUADLET_REQUEST:
628 case TCODE_READ_BLOCK_REQUEST:
629 case TCODE_LOCK_MASK_SWAP:
630 case TCODE_LOCK_COMPARE_SWAP:
631 case TCODE_LOCK_FETCH_ADD:
632 case TCODE_LOCK_LITTLE_ADD:
633 case TCODE_LOCK_BOUNDED_ADD:
634 case TCODE_LOCK_WRAP_ADD:
635 case TCODE_LOCK_VENDOR_DEPENDENT:
636 break;
637 default:
638 return -EINVAL;
639 }
640
641 return init_request(client, &arg->send_request, client->device->node_id,
642 client->device->max_speed);
643}
644
645static inline bool is_fcp_request(struct fw_request *request)
646{
647 return request == NULL;
648}
649
650static void release_request(struct client *client,
651 struct client_resource *resource)
652{
653 struct inbound_transaction_resource *r = container_of(resource,
654 struct inbound_transaction_resource, resource);
655
656 if (is_fcp_request(r->request))
657 kfree(r->data);
658 else
659 fw_send_response(r->card, r->request, RCODE_CONFLICT_ERROR);
660
661 fw_card_put(r->card);
662 kfree(r);
663}
664
665static void handle_request(struct fw_card *card, struct fw_request *request,
666 int tcode, int destination, int source,
667 int generation, unsigned long long offset,
668 void *payload, size_t length, void *callback_data)
669{
670 struct address_handler_resource *handler = callback_data;
671 struct inbound_transaction_resource *r;
672 struct inbound_transaction_event *e;
673 size_t event_size0;
674 void *fcp_frame = NULL;
675 int ret;
676
677 /* card may be different from handler->client->device->card */
678 fw_card_get(card);
679
680 r = kmalloc(sizeof(*r), GFP_ATOMIC);
681 e = kmalloc(sizeof(*e), GFP_ATOMIC);
682 if (r == NULL || e == NULL)
683 goto failed;
684
685 r->card = card;
686 r->request = request;
687 r->data = payload;
688 r->length = length;
689
690 if (is_fcp_request(request)) {
691 /*
692 * FIXME: Let core-transaction.c manage a
693 * single reference-counted copy?
694 */
695 fcp_frame = kmemdup(payload, length, GFP_ATOMIC);
696 if (fcp_frame == NULL)
697 goto failed;
698
699 r->data = fcp_frame;
700 }
701
702 r->resource.release = release_request;
703 ret = add_client_resource(handler->client, &r->resource, GFP_ATOMIC);
704 if (ret < 0)
705 goto failed;
706
707 if (handler->client->version < FW_CDEV_VERSION_EVENT_REQUEST2) {
708 struct fw_cdev_event_request *req = &e->req.request;
709
710 if (tcode & 0x10)
711 tcode = TCODE_LOCK_REQUEST;
712
713 req->type = FW_CDEV_EVENT_REQUEST;
714 req->tcode = tcode;
715 req->offset = offset;
716 req->length = length;
717 req->handle = r->resource.handle;
718 req->closure = handler->closure;
719 event_size0 = sizeof(*req);
720 } else {
721 struct fw_cdev_event_request2 *req = &e->req.request2;
722
723 req->type = FW_CDEV_EVENT_REQUEST2;
724 req->tcode = tcode;
725 req->offset = offset;
726 req->source_node_id = source;
727 req->destination_node_id = destination;
728 req->card = card->index;
729 req->generation = generation;
730 req->length = length;
731 req->handle = r->resource.handle;
732 req->closure = handler->closure;
733 event_size0 = sizeof(*req);
734 }
735
736 queue_event(handler->client, &e->event,
737 &e->req, event_size0, r->data, length);
738 return;
739
740 failed:
741 kfree(r);
742 kfree(e);
743 kfree(fcp_frame);
744
745 if (!is_fcp_request(request))
746 fw_send_response(card, request, RCODE_CONFLICT_ERROR);
747
748 fw_card_put(card);
749}
750
751static void release_address_handler(struct client *client,
752 struct client_resource *resource)
753{
754 struct address_handler_resource *r =
755 container_of(resource, struct address_handler_resource, resource);
756
757 fw_core_remove_address_handler(&r->handler);
758 kfree(r);
759}
760
761static int ioctl_allocate(struct client *client, union ioctl_arg *arg)
762{
763 struct fw_cdev_allocate *a = &arg->allocate;
764 struct address_handler_resource *r;
765 struct fw_address_region region;
766 int ret;
767
768 r = kmalloc(sizeof(*r), GFP_KERNEL);
769 if (r == NULL)
770 return -ENOMEM;
771
772 region.start = a->offset;
773 if (client->version < FW_CDEV_VERSION_ALLOCATE_REGION_END)
774 region.end = a->offset + a->length;
775 else
776 region.end = a->region_end;
777
778 r->handler.length = a->length;
779 r->handler.address_callback = handle_request;
780 r->handler.callback_data = r;
781 r->closure = a->closure;
782 r->client = client;
783
784 ret = fw_core_add_address_handler(&r->handler, ®ion);
785 if (ret < 0) {
786 kfree(r);
787 return ret;
788 }
789 a->offset = r->handler.offset;
790
791 r->resource.release = release_address_handler;
792 ret = add_client_resource(client, &r->resource, GFP_KERNEL);
793 if (ret < 0) {
794 release_address_handler(client, &r->resource);
795 return ret;
796 }
797 a->handle = r->resource.handle;
798
799 return 0;
800}
801
802static int ioctl_deallocate(struct client *client, union ioctl_arg *arg)
803{
804 return release_client_resource(client, arg->deallocate.handle,
805 release_address_handler, NULL);
806}
807
808static int ioctl_send_response(struct client *client, union ioctl_arg *arg)
809{
810 struct fw_cdev_send_response *a = &arg->send_response;
811 struct client_resource *resource;
812 struct inbound_transaction_resource *r;
813 int ret = 0;
814
815 if (release_client_resource(client, a->handle,
816 release_request, &resource) < 0)
817 return -EINVAL;
818
819 r = container_of(resource, struct inbound_transaction_resource,
820 resource);
821 if (is_fcp_request(r->request))
822 goto out;
823
824 if (a->length != fw_get_response_length(r->request)) {
825 ret = -EINVAL;
826 kfree(r->request);
827 goto out;
828 }
829 if (copy_from_user(r->data, u64_to_uptr(a->data), a->length)) {
830 ret = -EFAULT;
831 kfree(r->request);
832 goto out;
833 }
834 fw_send_response(r->card, r->request, a->rcode);
835 out:
836 fw_card_put(r->card);
837 kfree(r);
838
839 return ret;
840}
841
842static int ioctl_initiate_bus_reset(struct client *client, union ioctl_arg *arg)
843{
844 fw_schedule_bus_reset(client->device->card, true,
845 arg->initiate_bus_reset.type == FW_CDEV_SHORT_RESET);
846 return 0;
847}
848
849static void release_descriptor(struct client *client,
850 struct client_resource *resource)
851{
852 struct descriptor_resource *r =
853 container_of(resource, struct descriptor_resource, resource);
854
855 fw_core_remove_descriptor(&r->descriptor);
856 kfree(r);
857}
858
859static int ioctl_add_descriptor(struct client *client, union ioctl_arg *arg)
860{
861 struct fw_cdev_add_descriptor *a = &arg->add_descriptor;
862 struct descriptor_resource *r;
863 int ret;
864
865 /* Access policy: Allow this ioctl only on local nodes' device files. */
866 if (!client->device->is_local)
867 return -ENOSYS;
868
869 if (a->length > 256)
870 return -EINVAL;
871
872 r = kmalloc(sizeof(*r) + a->length * 4, GFP_KERNEL);
873 if (r == NULL)
874 return -ENOMEM;
875
876 if (copy_from_user(r->data, u64_to_uptr(a->data), a->length * 4)) {
877 ret = -EFAULT;
878 goto failed;
879 }
880
881 r->descriptor.length = a->length;
882 r->descriptor.immediate = a->immediate;
883 r->descriptor.key = a->key;
884 r->descriptor.data = r->data;
885
886 ret = fw_core_add_descriptor(&r->descriptor);
887 if (ret < 0)
888 goto failed;
889
890 r->resource.release = release_descriptor;
891 ret = add_client_resource(client, &r->resource, GFP_KERNEL);
892 if (ret < 0) {
893 fw_core_remove_descriptor(&r->descriptor);
894 goto failed;
895 }
896 a->handle = r->resource.handle;
897
898 return 0;
899 failed:
900 kfree(r);
901
902 return ret;
903}
904
905static int ioctl_remove_descriptor(struct client *client, union ioctl_arg *arg)
906{
907 return release_client_resource(client, arg->remove_descriptor.handle,
908 release_descriptor, NULL);
909}
910
911static void iso_callback(struct fw_iso_context *context, u32 cycle,
912 size_t header_length, void *header, void *data)
913{
914 struct client *client = data;
915 struct iso_interrupt_event *e;
916
917 e = kmalloc(sizeof(*e) + header_length, GFP_ATOMIC);
918 if (e == NULL)
919 return;
920
921 e->interrupt.type = FW_CDEV_EVENT_ISO_INTERRUPT;
922 e->interrupt.closure = client->iso_closure;
923 e->interrupt.cycle = cycle;
924 e->interrupt.header_length = header_length;
925 memcpy(e->interrupt.header, header, header_length);
926 queue_event(client, &e->event, &e->interrupt,
927 sizeof(e->interrupt) + header_length, NULL, 0);
928}
929
930static void iso_mc_callback(struct fw_iso_context *context,
931 dma_addr_t completed, void *data)
932{
933 struct client *client = data;
934 struct iso_interrupt_mc_event *e;
935
936 e = kmalloc(sizeof(*e), GFP_ATOMIC);
937 if (e == NULL)
938 return;
939
940 e->interrupt.type = FW_CDEV_EVENT_ISO_INTERRUPT_MULTICHANNEL;
941 e->interrupt.closure = client->iso_closure;
942 e->interrupt.completed = fw_iso_buffer_lookup(&client->buffer,
943 completed);
944 queue_event(client, &e->event, &e->interrupt,
945 sizeof(e->interrupt), NULL, 0);
946}
947
948static enum dma_data_direction iso_dma_direction(struct fw_iso_context *context)
949{
950 if (context->type == FW_ISO_CONTEXT_TRANSMIT)
951 return DMA_TO_DEVICE;
952 else
953 return DMA_FROM_DEVICE;
954}
955
956static int ioctl_create_iso_context(struct client *client, union ioctl_arg *arg)
957{
958 struct fw_cdev_create_iso_context *a = &arg->create_iso_context;
959 struct fw_iso_context *context;
960 fw_iso_callback_t cb;
961 int ret;
962
963 BUILD_BUG_ON(FW_CDEV_ISO_CONTEXT_TRANSMIT != FW_ISO_CONTEXT_TRANSMIT ||
964 FW_CDEV_ISO_CONTEXT_RECEIVE != FW_ISO_CONTEXT_RECEIVE ||
965 FW_CDEV_ISO_CONTEXT_RECEIVE_MULTICHANNEL !=
966 FW_ISO_CONTEXT_RECEIVE_MULTICHANNEL);
967
968 switch (a->type) {
969 case FW_ISO_CONTEXT_TRANSMIT:
970 if (a->speed > SCODE_3200 || a->channel > 63)
971 return -EINVAL;
972
973 cb = iso_callback;
974 break;
975
976 case FW_ISO_CONTEXT_RECEIVE:
977 if (a->header_size < 4 || (a->header_size & 3) ||
978 a->channel > 63)
979 return -EINVAL;
980
981 cb = iso_callback;
982 break;
983
984 case FW_ISO_CONTEXT_RECEIVE_MULTICHANNEL:
985 cb = (fw_iso_callback_t)iso_mc_callback;
986 break;
987
988 default:
989 return -EINVAL;
990 }
991
992 context = fw_iso_context_create(client->device->card, a->type,
993 a->channel, a->speed, a->header_size, cb, client);
994 if (IS_ERR(context))
995 return PTR_ERR(context);
996 if (client->version < FW_CDEV_VERSION_AUTO_FLUSH_ISO_OVERFLOW)
997 context->drop_overflow_headers = true;
998
999 /* We only support one context at this time. */
1000 spin_lock_irq(&client->lock);
1001 if (client->iso_context != NULL) {
1002 spin_unlock_irq(&client->lock);
1003 fw_iso_context_destroy(context);
1004
1005 return -EBUSY;
1006 }
1007 if (!client->buffer_is_mapped) {
1008 ret = fw_iso_buffer_map_dma(&client->buffer,
1009 client->device->card,
1010 iso_dma_direction(context));
1011 if (ret < 0) {
1012 spin_unlock_irq(&client->lock);
1013 fw_iso_context_destroy(context);
1014
1015 return ret;
1016 }
1017 client->buffer_is_mapped = true;
1018 }
1019 client->iso_closure = a->closure;
1020 client->iso_context = context;
1021 spin_unlock_irq(&client->lock);
1022
1023 a->handle = 0;
1024
1025 return 0;
1026}
1027
1028static int ioctl_set_iso_channels(struct client *client, union ioctl_arg *arg)
1029{
1030 struct fw_cdev_set_iso_channels *a = &arg->set_iso_channels;
1031 struct fw_iso_context *ctx = client->iso_context;
1032
1033 if (ctx == NULL || a->handle != 0)
1034 return -EINVAL;
1035
1036 return fw_iso_context_set_channels(ctx, &a->channels);
1037}
1038
1039/* Macros for decoding the iso packet control header. */
1040#define GET_PAYLOAD_LENGTH(v) ((v) & 0xffff)
1041#define GET_INTERRUPT(v) (((v) >> 16) & 0x01)
1042#define GET_SKIP(v) (((v) >> 17) & 0x01)
1043#define GET_TAG(v) (((v) >> 18) & 0x03)
1044#define GET_SY(v) (((v) >> 20) & 0x0f)
1045#define GET_HEADER_LENGTH(v) (((v) >> 24) & 0xff)
1046
1047static int ioctl_queue_iso(struct client *client, union ioctl_arg *arg)
1048{
1049 struct fw_cdev_queue_iso *a = &arg->queue_iso;
1050 struct fw_cdev_iso_packet __user *p, *end, *next;
1051 struct fw_iso_context *ctx = client->iso_context;
1052 unsigned long payload, buffer_end, transmit_header_bytes = 0;
1053 u32 control;
1054 int count;
1055 struct {
1056 struct fw_iso_packet packet;
1057 u8 header[256];
1058 } u;
1059
1060 if (ctx == NULL || a->handle != 0)
1061 return -EINVAL;
1062
1063 /*
1064 * If the user passes a non-NULL data pointer, has mmap()'ed
1065 * the iso buffer, and the pointer points inside the buffer,
1066 * we setup the payload pointers accordingly. Otherwise we
1067 * set them both to 0, which will still let packets with
1068 * payload_length == 0 through. In other words, if no packets
1069 * use the indirect payload, the iso buffer need not be mapped
1070 * and the a->data pointer is ignored.
1071 */
1072 payload = (unsigned long)a->data - client->vm_start;
1073 buffer_end = client->buffer.page_count << PAGE_SHIFT;
1074 if (a->data == 0 || client->buffer.pages == NULL ||
1075 payload >= buffer_end) {
1076 payload = 0;
1077 buffer_end = 0;
1078 }
1079
1080 if (ctx->type == FW_ISO_CONTEXT_RECEIVE_MULTICHANNEL && payload & 3)
1081 return -EINVAL;
1082
1083 p = (struct fw_cdev_iso_packet __user *)u64_to_uptr(a->packets);
1084
1085 end = (void __user *)p + a->size;
1086 count = 0;
1087 while (p < end) {
1088 if (get_user(control, &p->control))
1089 return -EFAULT;
1090 u.packet.payload_length = GET_PAYLOAD_LENGTH(control);
1091 u.packet.interrupt = GET_INTERRUPT(control);
1092 u.packet.skip = GET_SKIP(control);
1093 u.packet.tag = GET_TAG(control);
1094 u.packet.sy = GET_SY(control);
1095 u.packet.header_length = GET_HEADER_LENGTH(control);
1096
1097 switch (ctx->type) {
1098 case FW_ISO_CONTEXT_TRANSMIT:
1099 if (u.packet.header_length & 3)
1100 return -EINVAL;
1101 transmit_header_bytes = u.packet.header_length;
1102 break;
1103
1104 case FW_ISO_CONTEXT_RECEIVE:
1105 if (u.packet.header_length == 0 ||
1106 u.packet.header_length % ctx->header_size != 0)
1107 return -EINVAL;
1108 break;
1109
1110 case FW_ISO_CONTEXT_RECEIVE_MULTICHANNEL:
1111 if (u.packet.payload_length == 0 ||
1112 u.packet.payload_length & 3)
1113 return -EINVAL;
1114 break;
1115 }
1116
1117 next = (struct fw_cdev_iso_packet __user *)
1118 &p->header[transmit_header_bytes / 4];
1119 if (next > end)
1120 return -EINVAL;
1121 if (copy_from_user
1122 (u.packet.header, p->header, transmit_header_bytes))
1123 return -EFAULT;
1124 if (u.packet.skip && ctx->type == FW_ISO_CONTEXT_TRANSMIT &&
1125 u.packet.header_length + u.packet.payload_length > 0)
1126 return -EINVAL;
1127 if (payload + u.packet.payload_length > buffer_end)
1128 return -EINVAL;
1129
1130 if (fw_iso_context_queue(ctx, &u.packet,
1131 &client->buffer, payload))
1132 break;
1133
1134 p = next;
1135 payload += u.packet.payload_length;
1136 count++;
1137 }
1138 fw_iso_context_queue_flush(ctx);
1139
1140 a->size -= uptr_to_u64(p) - a->packets;
1141 a->packets = uptr_to_u64(p);
1142 a->data = client->vm_start + payload;
1143
1144 return count;
1145}
1146
1147static int ioctl_start_iso(struct client *client, union ioctl_arg *arg)
1148{
1149 struct fw_cdev_start_iso *a = &arg->start_iso;
1150
1151 BUILD_BUG_ON(
1152 FW_CDEV_ISO_CONTEXT_MATCH_TAG0 != FW_ISO_CONTEXT_MATCH_TAG0 ||
1153 FW_CDEV_ISO_CONTEXT_MATCH_TAG1 != FW_ISO_CONTEXT_MATCH_TAG1 ||
1154 FW_CDEV_ISO_CONTEXT_MATCH_TAG2 != FW_ISO_CONTEXT_MATCH_TAG2 ||
1155 FW_CDEV_ISO_CONTEXT_MATCH_TAG3 != FW_ISO_CONTEXT_MATCH_TAG3 ||
1156 FW_CDEV_ISO_CONTEXT_MATCH_ALL_TAGS != FW_ISO_CONTEXT_MATCH_ALL_TAGS);
1157
1158 if (client->iso_context == NULL || a->handle != 0)
1159 return -EINVAL;
1160
1161 if (client->iso_context->type == FW_ISO_CONTEXT_RECEIVE &&
1162 (a->tags == 0 || a->tags > 15 || a->sync > 15))
1163 return -EINVAL;
1164
1165 return fw_iso_context_start(client->iso_context,
1166 a->cycle, a->sync, a->tags);
1167}
1168
1169static int ioctl_stop_iso(struct client *client, union ioctl_arg *arg)
1170{
1171 struct fw_cdev_stop_iso *a = &arg->stop_iso;
1172
1173 if (client->iso_context == NULL || a->handle != 0)
1174 return -EINVAL;
1175
1176 return fw_iso_context_stop(client->iso_context);
1177}
1178
1179static int ioctl_flush_iso(struct client *client, union ioctl_arg *arg)
1180{
1181 struct fw_cdev_flush_iso *a = &arg->flush_iso;
1182
1183 if (client->iso_context == NULL || a->handle != 0)
1184 return -EINVAL;
1185
1186 return fw_iso_context_flush_completions(client->iso_context);
1187}
1188
1189static int ioctl_get_cycle_timer2(struct client *client, union ioctl_arg *arg)
1190{
1191 struct fw_cdev_get_cycle_timer2 *a = &arg->get_cycle_timer2;
1192 struct fw_card *card = client->device->card;
1193 struct timespec64 ts = {0, 0};
1194 u32 cycle_time;
1195 int ret = 0;
1196
1197 local_irq_disable();
1198
1199 cycle_time = card->driver->read_csr(card, CSR_CYCLE_TIME);
1200
1201 switch (a->clk_id) {
1202 case CLOCK_REALTIME: ktime_get_real_ts64(&ts); break;
1203 case CLOCK_MONOTONIC: ktime_get_ts64(&ts); break;
1204 case CLOCK_MONOTONIC_RAW: ktime_get_raw_ts64(&ts); break;
1205 default:
1206 ret = -EINVAL;
1207 }
1208
1209 local_irq_enable();
1210
1211 a->tv_sec = ts.tv_sec;
1212 a->tv_nsec = ts.tv_nsec;
1213 a->cycle_timer = cycle_time;
1214
1215 return ret;
1216}
1217
1218static int ioctl_get_cycle_timer(struct client *client, union ioctl_arg *arg)
1219{
1220 struct fw_cdev_get_cycle_timer *a = &arg->get_cycle_timer;
1221 struct fw_cdev_get_cycle_timer2 ct2;
1222
1223 ct2.clk_id = CLOCK_REALTIME;
1224 ioctl_get_cycle_timer2(client, (union ioctl_arg *)&ct2);
1225
1226 a->local_time = ct2.tv_sec * USEC_PER_SEC + ct2.tv_nsec / NSEC_PER_USEC;
1227 a->cycle_timer = ct2.cycle_timer;
1228
1229 return 0;
1230}
1231
1232static void iso_resource_work(struct work_struct *work)
1233{
1234 struct iso_resource_event *e;
1235 struct iso_resource *r =
1236 container_of(work, struct iso_resource, work.work);
1237 struct client *client = r->client;
1238 int generation, channel, bandwidth, todo;
1239 bool skip, free, success;
1240
1241 spin_lock_irq(&client->lock);
1242 generation = client->device->generation;
1243 todo = r->todo;
1244 /* Allow 1000ms grace period for other reallocations. */
1245 if (todo == ISO_RES_ALLOC &&
1246 time_before64(get_jiffies_64(),
1247 client->device->card->reset_jiffies + HZ)) {
1248 schedule_iso_resource(r, DIV_ROUND_UP(HZ, 3));
1249 skip = true;
1250 } else {
1251 /* We could be called twice within the same generation. */
1252 skip = todo == ISO_RES_REALLOC &&
1253 r->generation == generation;
1254 }
1255 free = todo == ISO_RES_DEALLOC ||
1256 todo == ISO_RES_ALLOC_ONCE ||
1257 todo == ISO_RES_DEALLOC_ONCE;
1258 r->generation = generation;
1259 spin_unlock_irq(&client->lock);
1260
1261 if (skip)
1262 goto out;
1263
1264 bandwidth = r->bandwidth;
1265
1266 fw_iso_resource_manage(client->device->card, generation,
1267 r->channels, &channel, &bandwidth,
1268 todo == ISO_RES_ALLOC ||
1269 todo == ISO_RES_REALLOC ||
1270 todo == ISO_RES_ALLOC_ONCE);
1271 /*
1272 * Is this generation outdated already? As long as this resource sticks
1273 * in the idr, it will be scheduled again for a newer generation or at
1274 * shutdown.
1275 */
1276 if (channel == -EAGAIN &&
1277 (todo == ISO_RES_ALLOC || todo == ISO_RES_REALLOC))
1278 goto out;
1279
1280 success = channel >= 0 || bandwidth > 0;
1281
1282 spin_lock_irq(&client->lock);
1283 /*
1284 * Transit from allocation to reallocation, except if the client
1285 * requested deallocation in the meantime.
1286 */
1287 if (r->todo == ISO_RES_ALLOC)
1288 r->todo = ISO_RES_REALLOC;
1289 /*
1290 * Allocation or reallocation failure? Pull this resource out of the
1291 * idr and prepare for deletion, unless the client is shutting down.
1292 */
1293 if (r->todo == ISO_RES_REALLOC && !success &&
1294 !client->in_shutdown &&
1295 idr_remove(&client->resource_idr, r->resource.handle)) {
1296 client_put(client);
1297 free = true;
1298 }
1299 spin_unlock_irq(&client->lock);
1300
1301 if (todo == ISO_RES_ALLOC && channel >= 0)
1302 r->channels = 1ULL << channel;
1303
1304 if (todo == ISO_RES_REALLOC && success)
1305 goto out;
1306
1307 if (todo == ISO_RES_ALLOC || todo == ISO_RES_ALLOC_ONCE) {
1308 e = r->e_alloc;
1309 r->e_alloc = NULL;
1310 } else {
1311 e = r->e_dealloc;
1312 r->e_dealloc = NULL;
1313 }
1314 e->iso_resource.handle = r->resource.handle;
1315 e->iso_resource.channel = channel;
1316 e->iso_resource.bandwidth = bandwidth;
1317
1318 queue_event(client, &e->event,
1319 &e->iso_resource, sizeof(e->iso_resource), NULL, 0);
1320
1321 if (free) {
1322 cancel_delayed_work(&r->work);
1323 kfree(r->e_alloc);
1324 kfree(r->e_dealloc);
1325 kfree(r);
1326 }
1327 out:
1328 client_put(client);
1329}
1330
1331static void release_iso_resource(struct client *client,
1332 struct client_resource *resource)
1333{
1334 struct iso_resource *r =
1335 container_of(resource, struct iso_resource, resource);
1336
1337 spin_lock_irq(&client->lock);
1338 r->todo = ISO_RES_DEALLOC;
1339 schedule_iso_resource(r, 0);
1340 spin_unlock_irq(&client->lock);
1341}
1342
1343static int init_iso_resource(struct client *client,
1344 struct fw_cdev_allocate_iso_resource *request, int todo)
1345{
1346 struct iso_resource_event *e1, *e2;
1347 struct iso_resource *r;
1348 int ret;
1349
1350 if ((request->channels == 0 && request->bandwidth == 0) ||
1351 request->bandwidth > BANDWIDTH_AVAILABLE_INITIAL)
1352 return -EINVAL;
1353
1354 r = kmalloc(sizeof(*r), GFP_KERNEL);
1355 e1 = kmalloc(sizeof(*e1), GFP_KERNEL);
1356 e2 = kmalloc(sizeof(*e2), GFP_KERNEL);
1357 if (r == NULL || e1 == NULL || e2 == NULL) {
1358 ret = -ENOMEM;
1359 goto fail;
1360 }
1361
1362 INIT_DELAYED_WORK(&r->work, iso_resource_work);
1363 r->client = client;
1364 r->todo = todo;
1365 r->generation = -1;
1366 r->channels = request->channels;
1367 r->bandwidth = request->bandwidth;
1368 r->e_alloc = e1;
1369 r->e_dealloc = e2;
1370
1371 e1->iso_resource.closure = request->closure;
1372 e1->iso_resource.type = FW_CDEV_EVENT_ISO_RESOURCE_ALLOCATED;
1373 e2->iso_resource.closure = request->closure;
1374 e2->iso_resource.type = FW_CDEV_EVENT_ISO_RESOURCE_DEALLOCATED;
1375
1376 if (todo == ISO_RES_ALLOC) {
1377 r->resource.release = release_iso_resource;
1378 ret = add_client_resource(client, &r->resource, GFP_KERNEL);
1379 if (ret < 0)
1380 goto fail;
1381 } else {
1382 r->resource.release = NULL;
1383 r->resource.handle = -1;
1384 schedule_iso_resource(r, 0);
1385 }
1386 request->handle = r->resource.handle;
1387
1388 return 0;
1389 fail:
1390 kfree(r);
1391 kfree(e1);
1392 kfree(e2);
1393
1394 return ret;
1395}
1396
1397static int ioctl_allocate_iso_resource(struct client *client,
1398 union ioctl_arg *arg)
1399{
1400 return init_iso_resource(client,
1401 &arg->allocate_iso_resource, ISO_RES_ALLOC);
1402}
1403
1404static int ioctl_deallocate_iso_resource(struct client *client,
1405 union ioctl_arg *arg)
1406{
1407 return release_client_resource(client,
1408 arg->deallocate.handle, release_iso_resource, NULL);
1409}
1410
1411static int ioctl_allocate_iso_resource_once(struct client *client,
1412 union ioctl_arg *arg)
1413{
1414 return init_iso_resource(client,
1415 &arg->allocate_iso_resource, ISO_RES_ALLOC_ONCE);
1416}
1417
1418static int ioctl_deallocate_iso_resource_once(struct client *client,
1419 union ioctl_arg *arg)
1420{
1421 return init_iso_resource(client,
1422 &arg->allocate_iso_resource, ISO_RES_DEALLOC_ONCE);
1423}
1424
1425/*
1426 * Returns a speed code: Maximum speed to or from this device,
1427 * limited by the device's link speed, the local node's link speed,
1428 * and all PHY port speeds between the two links.
1429 */
1430static int ioctl_get_speed(struct client *client, union ioctl_arg *arg)
1431{
1432 return client->device->max_speed;
1433}
1434
1435static int ioctl_send_broadcast_request(struct client *client,
1436 union ioctl_arg *arg)
1437{
1438 struct fw_cdev_send_request *a = &arg->send_request;
1439
1440 switch (a->tcode) {
1441 case TCODE_WRITE_QUADLET_REQUEST:
1442 case TCODE_WRITE_BLOCK_REQUEST:
1443 break;
1444 default:
1445 return -EINVAL;
1446 }
1447
1448 /* Security policy: Only allow accesses to Units Space. */
1449 if (a->offset < CSR_REGISTER_BASE + CSR_CONFIG_ROM_END)
1450 return -EACCES;
1451
1452 return init_request(client, a, LOCAL_BUS | 0x3f, SCODE_100);
1453}
1454
1455static int ioctl_send_stream_packet(struct client *client, union ioctl_arg *arg)
1456{
1457 struct fw_cdev_send_stream_packet *a = &arg->send_stream_packet;
1458 struct fw_cdev_send_request request;
1459 int dest;
1460
1461 if (a->speed > client->device->card->link_speed ||
1462 a->length > 1024 << a->speed)
1463 return -EIO;
1464
1465 if (a->tag > 3 || a->channel > 63 || a->sy > 15)
1466 return -EINVAL;
1467
1468 dest = fw_stream_packet_destination_id(a->tag, a->channel, a->sy);
1469 request.tcode = TCODE_STREAM_DATA;
1470 request.length = a->length;
1471 request.closure = a->closure;
1472 request.data = a->data;
1473 request.generation = a->generation;
1474
1475 return init_request(client, &request, dest, a->speed);
1476}
1477
1478static void outbound_phy_packet_callback(struct fw_packet *packet,
1479 struct fw_card *card, int status)
1480{
1481 struct outbound_phy_packet_event *e =
1482 container_of(packet, struct outbound_phy_packet_event, p);
1483
1484 switch (status) {
1485 /* expected: */
1486 case ACK_COMPLETE: e->phy_packet.rcode = RCODE_COMPLETE; break;
1487 /* should never happen with PHY packets: */
1488 case ACK_PENDING: e->phy_packet.rcode = RCODE_COMPLETE; break;
1489 case ACK_BUSY_X:
1490 case ACK_BUSY_A:
1491 case ACK_BUSY_B: e->phy_packet.rcode = RCODE_BUSY; break;
1492 case ACK_DATA_ERROR: e->phy_packet.rcode = RCODE_DATA_ERROR; break;
1493 case ACK_TYPE_ERROR: e->phy_packet.rcode = RCODE_TYPE_ERROR; break;
1494 /* stale generation; cancelled; on certain controllers: no ack */
1495 default: e->phy_packet.rcode = status; break;
1496 }
1497 e->phy_packet.data[0] = packet->timestamp;
1498
1499 queue_event(e->client, &e->event, &e->phy_packet,
1500 sizeof(e->phy_packet) + e->phy_packet.length, NULL, 0);
1501 client_put(e->client);
1502}
1503
1504static int ioctl_send_phy_packet(struct client *client, union ioctl_arg *arg)
1505{
1506 struct fw_cdev_send_phy_packet *a = &arg->send_phy_packet;
1507 struct fw_card *card = client->device->card;
1508 struct outbound_phy_packet_event *e;
1509
1510 /* Access policy: Allow this ioctl only on local nodes' device files. */
1511 if (!client->device->is_local)
1512 return -ENOSYS;
1513
1514 e = kzalloc(sizeof(*e) + 4, GFP_KERNEL);
1515 if (e == NULL)
1516 return -ENOMEM;
1517
1518 client_get(client);
1519 e->client = client;
1520 e->p.speed = SCODE_100;
1521 e->p.generation = a->generation;
1522 e->p.header[0] = TCODE_LINK_INTERNAL << 4;
1523 e->p.header[1] = a->data[0];
1524 e->p.header[2] = a->data[1];
1525 e->p.header_length = 12;
1526 e->p.callback = outbound_phy_packet_callback;
1527 e->phy_packet.closure = a->closure;
1528 e->phy_packet.type = FW_CDEV_EVENT_PHY_PACKET_SENT;
1529 if (is_ping_packet(a->data))
1530 e->phy_packet.length = 4;
1531
1532 card->driver->send_request(card, &e->p);
1533
1534 return 0;
1535}
1536
1537static int ioctl_receive_phy_packets(struct client *client, union ioctl_arg *arg)
1538{
1539 struct fw_cdev_receive_phy_packets *a = &arg->receive_phy_packets;
1540 struct fw_card *card = client->device->card;
1541
1542 /* Access policy: Allow this ioctl only on local nodes' device files. */
1543 if (!client->device->is_local)
1544 return -ENOSYS;
1545
1546 spin_lock_irq(&card->lock);
1547
1548 list_move_tail(&client->phy_receiver_link, &card->phy_receiver_list);
1549 client->phy_receiver_closure = a->closure;
1550
1551 spin_unlock_irq(&card->lock);
1552
1553 return 0;
1554}
1555
1556void fw_cdev_handle_phy_packet(struct fw_card *card, struct fw_packet *p)
1557{
1558 struct client *client;
1559 struct inbound_phy_packet_event *e;
1560 unsigned long flags;
1561
1562 spin_lock_irqsave(&card->lock, flags);
1563
1564 list_for_each_entry(client, &card->phy_receiver_list, phy_receiver_link) {
1565 e = kmalloc(sizeof(*e) + 8, GFP_ATOMIC);
1566 if (e == NULL)
1567 break;
1568
1569 e->phy_packet.closure = client->phy_receiver_closure;
1570 e->phy_packet.type = FW_CDEV_EVENT_PHY_PACKET_RECEIVED;
1571 e->phy_packet.rcode = RCODE_COMPLETE;
1572 e->phy_packet.length = 8;
1573 e->phy_packet.data[0] = p->header[1];
1574 e->phy_packet.data[1] = p->header[2];
1575 queue_event(client, &e->event,
1576 &e->phy_packet, sizeof(e->phy_packet) + 8, NULL, 0);
1577 }
1578
1579 spin_unlock_irqrestore(&card->lock, flags);
1580}
1581
1582static int (* const ioctl_handlers[])(struct client *, union ioctl_arg *) = {
1583 [0x00] = ioctl_get_info,
1584 [0x01] = ioctl_send_request,
1585 [0x02] = ioctl_allocate,
1586 [0x03] = ioctl_deallocate,
1587 [0x04] = ioctl_send_response,
1588 [0x05] = ioctl_initiate_bus_reset,
1589 [0x06] = ioctl_add_descriptor,
1590 [0x07] = ioctl_remove_descriptor,
1591 [0x08] = ioctl_create_iso_context,
1592 [0x09] = ioctl_queue_iso,
1593 [0x0a] = ioctl_start_iso,
1594 [0x0b] = ioctl_stop_iso,
1595 [0x0c] = ioctl_get_cycle_timer,
1596 [0x0d] = ioctl_allocate_iso_resource,
1597 [0x0e] = ioctl_deallocate_iso_resource,
1598 [0x0f] = ioctl_allocate_iso_resource_once,
1599 [0x10] = ioctl_deallocate_iso_resource_once,
1600 [0x11] = ioctl_get_speed,
1601 [0x12] = ioctl_send_broadcast_request,
1602 [0x13] = ioctl_send_stream_packet,
1603 [0x14] = ioctl_get_cycle_timer2,
1604 [0x15] = ioctl_send_phy_packet,
1605 [0x16] = ioctl_receive_phy_packets,
1606 [0x17] = ioctl_set_iso_channels,
1607 [0x18] = ioctl_flush_iso,
1608};
1609
1610static int dispatch_ioctl(struct client *client,
1611 unsigned int cmd, void __user *arg)
1612{
1613 union ioctl_arg buffer;
1614 int ret;
1615
1616 if (fw_device_is_shutdown(client->device))
1617 return -ENODEV;
1618
1619 if (_IOC_TYPE(cmd) != '#' ||
1620 _IOC_NR(cmd) >= ARRAY_SIZE(ioctl_handlers) ||
1621 _IOC_SIZE(cmd) > sizeof(buffer))
1622 return -ENOTTY;
1623
1624 memset(&buffer, 0, sizeof(buffer));
1625
1626 if (_IOC_DIR(cmd) & _IOC_WRITE)
1627 if (copy_from_user(&buffer, arg, _IOC_SIZE(cmd)))
1628 return -EFAULT;
1629
1630 ret = ioctl_handlers[_IOC_NR(cmd)](client, &buffer);
1631 if (ret < 0)
1632 return ret;
1633
1634 if (_IOC_DIR(cmd) & _IOC_READ)
1635 if (copy_to_user(arg, &buffer, _IOC_SIZE(cmd)))
1636 return -EFAULT;
1637
1638 return ret;
1639}
1640
1641static long fw_device_op_ioctl(struct file *file,
1642 unsigned int cmd, unsigned long arg)
1643{
1644 return dispatch_ioctl(file->private_data, cmd, (void __user *)arg);
1645}
1646
1647static int fw_device_op_mmap(struct file *file, struct vm_area_struct *vma)
1648{
1649 struct client *client = file->private_data;
1650 unsigned long size;
1651 int page_count, ret;
1652
1653 if (fw_device_is_shutdown(client->device))
1654 return -ENODEV;
1655
1656 /* FIXME: We could support multiple buffers, but we don't. */
1657 if (client->buffer.pages != NULL)
1658 return -EBUSY;
1659
1660 if (!(vma->vm_flags & VM_SHARED))
1661 return -EINVAL;
1662
1663 if (vma->vm_start & ~PAGE_MASK)
1664 return -EINVAL;
1665
1666 client->vm_start = vma->vm_start;
1667 size = vma->vm_end - vma->vm_start;
1668 page_count = size >> PAGE_SHIFT;
1669 if (size & ~PAGE_MASK)
1670 return -EINVAL;
1671
1672 ret = fw_iso_buffer_alloc(&client->buffer, page_count);
1673 if (ret < 0)
1674 return ret;
1675
1676 spin_lock_irq(&client->lock);
1677 if (client->iso_context) {
1678 ret = fw_iso_buffer_map_dma(&client->buffer,
1679 client->device->card,
1680 iso_dma_direction(client->iso_context));
1681 client->buffer_is_mapped = (ret == 0);
1682 }
1683 spin_unlock_irq(&client->lock);
1684 if (ret < 0)
1685 goto fail;
1686
1687 ret = vm_map_pages_zero(vma, client->buffer.pages,
1688 client->buffer.page_count);
1689 if (ret < 0)
1690 goto fail;
1691
1692 return 0;
1693 fail:
1694 fw_iso_buffer_destroy(&client->buffer, client->device->card);
1695 return ret;
1696}
1697
1698static int is_outbound_transaction_resource(int id, void *p, void *data)
1699{
1700 struct client_resource *resource = p;
1701
1702 return resource->release == release_transaction;
1703}
1704
1705static int has_outbound_transactions(struct client *client)
1706{
1707 int ret;
1708
1709 spin_lock_irq(&client->lock);
1710 ret = idr_for_each(&client->resource_idr,
1711 is_outbound_transaction_resource, NULL);
1712 spin_unlock_irq(&client->lock);
1713
1714 return ret;
1715}
1716
1717static int shutdown_resource(int id, void *p, void *data)
1718{
1719 struct client_resource *resource = p;
1720 struct client *client = data;
1721
1722 resource->release(client, resource);
1723 client_put(client);
1724
1725 return 0;
1726}
1727
1728static int fw_device_op_release(struct inode *inode, struct file *file)
1729{
1730 struct client *client = file->private_data;
1731 struct event *event, *next_event;
1732
1733 spin_lock_irq(&client->device->card->lock);
1734 list_del(&client->phy_receiver_link);
1735 spin_unlock_irq(&client->device->card->lock);
1736
1737 mutex_lock(&client->device->client_list_mutex);
1738 list_del(&client->link);
1739 mutex_unlock(&client->device->client_list_mutex);
1740
1741 if (client->iso_context)
1742 fw_iso_context_destroy(client->iso_context);
1743
1744 if (client->buffer.pages)
1745 fw_iso_buffer_destroy(&client->buffer, client->device->card);
1746
1747 /* Freeze client->resource_idr and client->event_list */
1748 spin_lock_irq(&client->lock);
1749 client->in_shutdown = true;
1750 spin_unlock_irq(&client->lock);
1751
1752 wait_event(client->tx_flush_wait, !has_outbound_transactions(client));
1753
1754 idr_for_each(&client->resource_idr, shutdown_resource, client);
1755 idr_destroy(&client->resource_idr);
1756
1757 list_for_each_entry_safe(event, next_event, &client->event_list, link)
1758 kfree(event);
1759
1760 client_put(client);
1761
1762 return 0;
1763}
1764
1765static __poll_t fw_device_op_poll(struct file *file, poll_table * pt)
1766{
1767 struct client *client = file->private_data;
1768 __poll_t mask = 0;
1769
1770 poll_wait(file, &client->wait, pt);
1771
1772 if (fw_device_is_shutdown(client->device))
1773 mask |= EPOLLHUP | EPOLLERR;
1774 if (!list_empty(&client->event_list))
1775 mask |= EPOLLIN | EPOLLRDNORM;
1776
1777 return mask;
1778}
1779
1780const struct file_operations fw_device_ops = {
1781 .owner = THIS_MODULE,
1782 .llseek = no_llseek,
1783 .open = fw_device_op_open,
1784 .read = fw_device_op_read,
1785 .unlocked_ioctl = fw_device_op_ioctl,
1786 .mmap = fw_device_op_mmap,
1787 .release = fw_device_op_release,
1788 .poll = fw_device_op_poll,
1789 .compat_ioctl = compat_ptr_ioctl,
1790};