Commit | Line | Data |
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1a59d1b8 | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
c781c06d KH |
2 | /* |
3 | * Char device for device raw access | |
19a15b93 | 4 | * |
c781c06d | 5 | * Copyright (C) 2005-2007 Kristian Hoegsberg <krh@bitplanet.net> |
19a15b93 KH |
6 | */ |
7 | ||
eb5b35a5 | 8 | #include <linux/bug.h> |
be5bbd67 SR |
9 | #include <linux/compat.h> |
10 | #include <linux/delay.h> | |
11 | #include <linux/device.h> | |
0b6c4857 | 12 | #include <linux/dma-mapping.h> |
ebe4560e | 13 | #include <linux/err.h> |
be5bbd67 | 14 | #include <linux/errno.h> |
77c9a5da | 15 | #include <linux/firewire.h> |
be5bbd67 SR |
16 | #include <linux/firewire-cdev.h> |
17 | #include <linux/idr.h> | |
4a9bde9b | 18 | #include <linux/irqflags.h> |
b1bda4cd | 19 | #include <linux/jiffies.h> |
19a15b93 | 20 | #include <linux/kernel.h> |
fb443036 | 21 | #include <linux/kref.h> |
be5bbd67 SR |
22 | #include <linux/mm.h> |
23 | #include <linux/module.h> | |
d67cfb96 | 24 | #include <linux/mutex.h> |
19a15b93 | 25 | #include <linux/poll.h> |
ae2a9766 | 26 | #include <linux/sched.h> /* required for linux/wait.h */ |
5a0e3ad6 | 27 | #include <linux/slab.h> |
cf417e54 | 28 | #include <linux/spinlock.h> |
281e2032 | 29 | #include <linux/string.h> |
be5bbd67 | 30 | #include <linux/time.h> |
e034d242 | 31 | #include <linux/uaccess.h> |
be5bbd67 SR |
32 | #include <linux/vmalloc.h> |
33 | #include <linux/wait.h> | |
b1bda4cd | 34 | #include <linux/workqueue.h> |
be5bbd67 | 35 | |
be5bbd67 | 36 | |
77c9a5da | 37 | #include "core.h" |
1a4c53cf | 38 | #include <trace/events/firewire.h> |
19a15b93 | 39 | |
604f4516 SR |
40 | /* |
41 | * ABI version history is documented in linux/firewire-cdev.h. | |
42 | */ | |
18d62711 | 43 | #define FW_CDEV_KERNEL_VERSION 5 |
8e2b2b46 SR |
44 | #define FW_CDEV_VERSION_EVENT_REQUEST2 4 |
45 | #define FW_CDEV_VERSION_ALLOCATE_REGION_END 4 | |
0699a73a | 46 | #define FW_CDEV_VERSION_AUTO_FLUSH_ISO_OVERFLOW 5 |
6add87e9 | 47 | #define FW_CDEV_VERSION_EVENT_ASYNC_TSTAMP 6 |
604f4516 | 48 | |
19a15b93 | 49 | struct client { |
344bbc4d | 50 | u32 version; |
19a15b93 | 51 | struct fw_device *device; |
45ee3199 | 52 | |
19a15b93 | 53 | spinlock_t lock; |
45ee3199 JF |
54 | bool in_shutdown; |
55 | struct idr resource_idr; | |
19a15b93 | 56 | struct list_head event_list; |
19a15b93 | 57 | wait_queue_head_t wait; |
5a5e62da | 58 | wait_queue_head_t tx_flush_wait; |
da8ecffa | 59 | u64 bus_reset_closure; |
9aad8125 | 60 | |
19a15b93 | 61 | struct fw_iso_context *iso_context; |
abaa5743 | 62 | u64 iso_closure; |
9aad8125 KH |
63 | struct fw_iso_buffer buffer; |
64 | unsigned long vm_start; | |
0b6c4857 | 65 | bool buffer_is_mapped; |
97bd9efa | 66 | |
bf54e146 SR |
67 | struct list_head phy_receiver_link; |
68 | u64 phy_receiver_closure; | |
69 | ||
97bd9efa | 70 | struct list_head link; |
fb443036 | 71 | struct kref kref; |
19a15b93 KH |
72 | }; |
73 | ||
fb443036 SR |
74 | static inline void client_get(struct client *client) |
75 | { | |
76 | kref_get(&client->kref); | |
77 | } | |
78 | ||
79 | static void client_release(struct kref *kref) | |
80 | { | |
81 | struct client *client = container_of(kref, struct client, kref); | |
82 | ||
83 | fw_device_put(client->device); | |
84 | kfree(client); | |
85 | } | |
86 | ||
87 | static void client_put(struct client *client) | |
88 | { | |
89 | kref_put(&client->kref, client_release); | |
90 | } | |
91 | ||
97c18b7f SR |
92 | struct client_resource; |
93 | typedef void (*client_resource_release_fn_t)(struct client *, | |
94 | struct client_resource *); | |
95 | struct client_resource { | |
96 | client_resource_release_fn_t release; | |
97 | int handle; | |
98 | }; | |
99 | ||
100 | struct address_handler_resource { | |
101 | struct client_resource resource; | |
102 | struct fw_address_handler handler; | |
103 | __u64 closure; | |
104 | struct client *client; | |
105 | }; | |
106 | ||
107 | struct outbound_transaction_resource { | |
108 | struct client_resource resource; | |
109 | struct fw_transaction transaction; | |
110 | }; | |
111 | ||
112 | struct inbound_transaction_resource { | |
113 | struct client_resource resource; | |
08bd34c9 | 114 | struct fw_card *card; |
97c18b7f | 115 | struct fw_request *request; |
e6996002 | 116 | bool is_fcp; |
97c18b7f SR |
117 | void *data; |
118 | size_t length; | |
119 | }; | |
120 | ||
121 | struct descriptor_resource { | |
122 | struct client_resource resource; | |
123 | struct fw_descriptor descriptor; | |
c38e7e21 | 124 | u32 data[]; |
97c18b7f SR |
125 | }; |
126 | ||
b1bda4cd JFSR |
127 | struct iso_resource { |
128 | struct client_resource resource; | |
129 | struct client *client; | |
130 | /* Schedule work and access todo only with client->lock held. */ | |
131 | struct delayed_work work; | |
1ec3c026 SR |
132 | enum {ISO_RES_ALLOC, ISO_RES_REALLOC, ISO_RES_DEALLOC, |
133 | ISO_RES_ALLOC_ONCE, ISO_RES_DEALLOC_ONCE,} todo; | |
b1bda4cd JFSR |
134 | int generation; |
135 | u64 channels; | |
136 | s32 bandwidth; | |
137 | struct iso_resource_event *e_alloc, *e_dealloc; | |
138 | }; | |
139 | ||
b1bda4cd JFSR |
140 | static void release_iso_resource(struct client *, struct client_resource *); |
141 | ||
9fb551bf SR |
142 | static void schedule_iso_resource(struct iso_resource *r, unsigned long delay) |
143 | { | |
144 | client_get(r->client); | |
105e53f8 | 145 | if (!queue_delayed_work(fw_workqueue, &r->work, delay)) |
9fb551bf SR |
146 | client_put(r->client); |
147 | } | |
148 | ||
149 | static void schedule_if_iso_resource(struct client_resource *resource) | |
150 | { | |
151 | if (resource->release == release_iso_resource) | |
152 | schedule_iso_resource(container_of(resource, | |
153 | struct iso_resource, resource), 0); | |
154 | } | |
155 | ||
97c18b7f SR |
156 | /* |
157 | * dequeue_event() just kfree()'s the event, so the event has to be | |
158 | * the first field in a struct XYZ_event. | |
159 | */ | |
160 | struct event { | |
161 | struct { void *data; size_t size; } v[2]; | |
162 | struct list_head link; | |
163 | }; | |
164 | ||
165 | struct bus_reset_event { | |
166 | struct event event; | |
167 | struct fw_cdev_event_bus_reset reset; | |
168 | }; | |
169 | ||
170 | struct outbound_transaction_event { | |
171 | struct event event; | |
172 | struct client *client; | |
173 | struct outbound_transaction_resource r; | |
147e9d3a TS |
174 | union { |
175 | struct fw_cdev_event_response without_tstamp; | |
d8527cab | 176 | struct fw_cdev_event_response2 with_tstamp; |
147e9d3a | 177 | } rsp; |
97c18b7f SR |
178 | }; |
179 | ||
180 | struct inbound_transaction_event { | |
181 | struct event event; | |
e205597d SR |
182 | union { |
183 | struct fw_cdev_event_request request; | |
184 | struct fw_cdev_event_request2 request2; | |
865efffb | 185 | struct fw_cdev_event_request3 with_tstamp; |
e205597d | 186 | } req; |
97c18b7f SR |
187 | }; |
188 | ||
189 | struct iso_interrupt_event { | |
190 | struct event event; | |
191 | struct fw_cdev_event_iso_interrupt interrupt; | |
192 | }; | |
193 | ||
872e330e SR |
194 | struct iso_interrupt_mc_event { |
195 | struct event event; | |
196 | struct fw_cdev_event_iso_interrupt_mc interrupt; | |
197 | }; | |
198 | ||
b1bda4cd JFSR |
199 | struct iso_resource_event { |
200 | struct event event; | |
e21fcf79 | 201 | struct fw_cdev_event_iso_resource iso_resource; |
b1bda4cd JFSR |
202 | }; |
203 | ||
850bb6f2 SR |
204 | struct outbound_phy_packet_event { |
205 | struct event event; | |
206 | struct client *client; | |
207 | struct fw_packet p; | |
1ef14771 TS |
208 | union { |
209 | struct fw_cdev_event_phy_packet without_tstamp; | |
fe971f91 | 210 | struct fw_cdev_event_phy_packet2 with_tstamp; |
1ef14771 | 211 | } phy_packet; |
850bb6f2 SR |
212 | }; |
213 | ||
bf54e146 SR |
214 | struct inbound_phy_packet_event { |
215 | struct event event; | |
1ef14771 TS |
216 | union { |
217 | struct fw_cdev_event_phy_packet without_tstamp; | |
fe971f91 | 218 | struct fw_cdev_event_phy_packet2 with_tstamp; |
1ef14771 | 219 | } phy_packet; |
bf54e146 SR |
220 | }; |
221 | ||
9c1176b6 SR |
222 | #ifdef CONFIG_COMPAT |
223 | static void __user *u64_to_uptr(u64 value) | |
224 | { | |
a25045ff | 225 | if (in_compat_syscall()) |
9c1176b6 SR |
226 | return compat_ptr(value); |
227 | else | |
228 | return (void __user *)(unsigned long)value; | |
229 | } | |
230 | ||
231 | static u64 uptr_to_u64(void __user *ptr) | |
232 | { | |
a25045ff | 233 | if (in_compat_syscall()) |
9c1176b6 SR |
234 | return ptr_to_compat(ptr); |
235 | else | |
236 | return (u64)(unsigned long)ptr; | |
237 | } | |
238 | #else | |
239 | static inline void __user *u64_to_uptr(u64 value) | |
19a15b93 KH |
240 | { |
241 | return (void __user *)(unsigned long)value; | |
242 | } | |
243 | ||
9c1176b6 | 244 | static inline u64 uptr_to_u64(void __user *ptr) |
19a15b93 | 245 | { |
9c1176b6 | 246 | return (u64)(unsigned long)ptr; |
19a15b93 | 247 | } |
9c1176b6 | 248 | #endif /* CONFIG_COMPAT */ |
19a15b93 KH |
249 | |
250 | static int fw_device_op_open(struct inode *inode, struct file *file) | |
251 | { | |
252 | struct fw_device *device; | |
253 | struct client *client; | |
254 | ||
96b19062 | 255 | device = fw_device_get_by_devt(inode->i_rdev); |
a3aca3da KH |
256 | if (device == NULL) |
257 | return -ENODEV; | |
19a15b93 | 258 | |
551f4cb9 JF |
259 | if (fw_device_is_shutdown(device)) { |
260 | fw_device_put(device); | |
261 | return -ENODEV; | |
262 | } | |
263 | ||
2d826cc5 | 264 | client = kzalloc(sizeof(*client), GFP_KERNEL); |
96b19062 SR |
265 | if (client == NULL) { |
266 | fw_device_put(device); | |
19a15b93 | 267 | return -ENOMEM; |
96b19062 | 268 | } |
19a15b93 | 269 | |
96b19062 | 270 | client->device = device; |
19a15b93 | 271 | spin_lock_init(&client->lock); |
45ee3199 JF |
272 | idr_init(&client->resource_idr); |
273 | INIT_LIST_HEAD(&client->event_list); | |
19a15b93 | 274 | init_waitqueue_head(&client->wait); |
5a5e62da | 275 | init_waitqueue_head(&client->tx_flush_wait); |
bf54e146 | 276 | INIT_LIST_HEAD(&client->phy_receiver_link); |
93b37905 | 277 | INIT_LIST_HEAD(&client->link); |
fb443036 | 278 | kref_init(&client->kref); |
19a15b93 KH |
279 | |
280 | file->private_data = client; | |
281 | ||
3ac26b2e | 282 | return nonseekable_open(inode, file); |
19a15b93 KH |
283 | } |
284 | ||
285 | static void queue_event(struct client *client, struct event *event, | |
286 | void *data0, size_t size0, void *data1, size_t size1) | |
287 | { | |
288 | unsigned long flags; | |
289 | ||
290 | event->v[0].data = data0; | |
291 | event->v[0].size = size0; | |
292 | event->v[1].data = data1; | |
293 | event->v[1].size = size1; | |
294 | ||
295 | spin_lock_irqsave(&client->lock, flags); | |
45ee3199 JF |
296 | if (client->in_shutdown) |
297 | kfree(event); | |
298 | else | |
299 | list_add_tail(&event->link, &client->event_list); | |
19a15b93 | 300 | spin_unlock_irqrestore(&client->lock, flags); |
83431cba JF |
301 | |
302 | wake_up_interruptible(&client->wait); | |
19a15b93 KH |
303 | } |
304 | ||
53dca511 SR |
305 | static int dequeue_event(struct client *client, |
306 | char __user *buffer, size_t count) | |
19a15b93 | 307 | { |
19a15b93 KH |
308 | struct event *event; |
309 | size_t size, total; | |
2dbd7d7e | 310 | int i, ret; |
19a15b93 | 311 | |
2dbd7d7e SR |
312 | ret = wait_event_interruptible(client->wait, |
313 | !list_empty(&client->event_list) || | |
314 | fw_device_is_shutdown(client->device)); | |
315 | if (ret < 0) | |
316 | return ret; | |
19a15b93 | 317 | |
2603bf21 KH |
318 | if (list_empty(&client->event_list) && |
319 | fw_device_is_shutdown(client->device)) | |
320 | return -ENODEV; | |
19a15b93 | 321 | |
3ba94986 | 322 | spin_lock_irq(&client->lock); |
a459b8ab | 323 | event = list_first_entry(&client->event_list, struct event, link); |
19a15b93 | 324 | list_del(&event->link); |
3ba94986 | 325 | spin_unlock_irq(&client->lock); |
19a15b93 | 326 | |
19a15b93 KH |
327 | total = 0; |
328 | for (i = 0; i < ARRAY_SIZE(event->v) && total < count; i++) { | |
329 | size = min(event->v[i].size, count - total); | |
2603bf21 | 330 | if (copy_to_user(buffer + total, event->v[i].data, size)) { |
2dbd7d7e | 331 | ret = -EFAULT; |
19a15b93 | 332 | goto out; |
2603bf21 | 333 | } |
19a15b93 KH |
334 | total += size; |
335 | } | |
2dbd7d7e | 336 | ret = total; |
19a15b93 KH |
337 | |
338 | out: | |
339 | kfree(event); | |
340 | ||
2dbd7d7e | 341 | return ret; |
19a15b93 KH |
342 | } |
343 | ||
53dca511 SR |
344 | static ssize_t fw_device_op_read(struct file *file, char __user *buffer, |
345 | size_t count, loff_t *offset) | |
19a15b93 KH |
346 | { |
347 | struct client *client = file->private_data; | |
348 | ||
349 | return dequeue_event(client, buffer, count); | |
350 | } | |
351 | ||
53dca511 SR |
352 | static void fill_bus_reset_event(struct fw_cdev_event_bus_reset *event, |
353 | struct client *client) | |
344bbc4d | 354 | { |
da8ecffa | 355 | struct fw_card *card = client->device->card; |
cf417e54 | 356 | |
3ba94986 | 357 | spin_lock_irq(&card->lock); |
344bbc4d | 358 | |
da8ecffa | 359 | event->closure = client->bus_reset_closure; |
344bbc4d | 360 | event->type = FW_CDEV_EVENT_BUS_RESET; |
cf5a56ac | 361 | event->generation = client->device->generation; |
da8ecffa | 362 | event->node_id = client->device->node_id; |
344bbc4d | 363 | event->local_node_id = card->local_node->node_id; |
250b2b6d | 364 | event->bm_node_id = card->bm_node_id; |
344bbc4d KH |
365 | event->irm_node_id = card->irm_node->node_id; |
366 | event->root_node_id = card->root_node->node_id; | |
cf417e54 | 367 | |
3ba94986 | 368 | spin_unlock_irq(&card->lock); |
344bbc4d KH |
369 | } |
370 | ||
53dca511 SR |
371 | static void for_each_client(struct fw_device *device, |
372 | void (*callback)(struct client *client)) | |
2603bf21 | 373 | { |
2603bf21 | 374 | struct client *c; |
2603bf21 | 375 | |
d67cfb96 | 376 | mutex_lock(&device->client_list_mutex); |
2603bf21 KH |
377 | list_for_each_entry(c, &device->client_list, link) |
378 | callback(c); | |
d67cfb96 | 379 | mutex_unlock(&device->client_list_mutex); |
2603bf21 KH |
380 | } |
381 | ||
b1bda4cd JFSR |
382 | static int schedule_reallocations(int id, void *p, void *data) |
383 | { | |
9fb551bf | 384 | schedule_if_iso_resource(p); |
b1bda4cd | 385 | |
b1bda4cd JFSR |
386 | return 0; |
387 | } | |
388 | ||
53dca511 | 389 | static void queue_bus_reset_event(struct client *client) |
97bd9efa | 390 | { |
97c18b7f | 391 | struct bus_reset_event *e; |
97bd9efa | 392 | |
97c18b7f | 393 | e = kzalloc(sizeof(*e), GFP_KERNEL); |
cfb0c9d1 | 394 | if (e == NULL) |
97bd9efa | 395 | return; |
97bd9efa | 396 | |
97c18b7f | 397 | fill_bus_reset_event(&e->reset, client); |
97bd9efa | 398 | |
97c18b7f SR |
399 | queue_event(client, &e->event, |
400 | &e->reset, sizeof(e->reset), NULL, 0); | |
b1bda4cd JFSR |
401 | |
402 | spin_lock_irq(&client->lock); | |
403 | idr_for_each(&client->resource_idr, schedule_reallocations, client); | |
404 | spin_unlock_irq(&client->lock); | |
97bd9efa KH |
405 | } |
406 | ||
407 | void fw_device_cdev_update(struct fw_device *device) | |
408 | { | |
2603bf21 KH |
409 | for_each_client(device, queue_bus_reset_event); |
410 | } | |
97bd9efa | 411 | |
2603bf21 KH |
412 | static void wake_up_client(struct client *client) |
413 | { | |
414 | wake_up_interruptible(&client->wait); | |
415 | } | |
97bd9efa | 416 | |
2603bf21 KH |
417 | void fw_device_cdev_remove(struct fw_device *device) |
418 | { | |
419 | for_each_client(device, wake_up_client); | |
97bd9efa KH |
420 | } |
421 | ||
6e95dea7 SR |
422 | union 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; | |
850bb6f2 | 439 | struct fw_cdev_send_phy_packet send_phy_packet; |
bf54e146 | 440 | struct fw_cdev_receive_phy_packets receive_phy_packets; |
872e330e | 441 | struct fw_cdev_set_iso_channels set_iso_channels; |
d1bbd209 | 442 | struct fw_cdev_flush_iso flush_iso; |
6e95dea7 SR |
443 | }; |
444 | ||
445 | static int ioctl_get_info(struct client *client, union ioctl_arg *arg) | |
19a15b93 | 446 | { |
6e95dea7 | 447 | struct fw_cdev_get_info *a = &arg->get_info; |
344bbc4d | 448 | struct fw_cdev_event_bus_reset bus_reset; |
c9755e14 | 449 | unsigned long ret = 0; |
344bbc4d | 450 | |
6e95dea7 | 451 | client->version = a->version; |
604f4516 | 452 | a->version = FW_CDEV_KERNEL_VERSION; |
6e95dea7 | 453 | a->card = client->device->card->index; |
344bbc4d | 454 | |
c9755e14 SR |
455 | down_read(&fw_device_rwsem); |
456 | ||
6e95dea7 SR |
457 | if (a->rom != 0) { |
458 | size_t want = a->rom_length; | |
d84702a5 | 459 | size_t have = client->device->config_rom_length * 4; |
344bbc4d | 460 | |
6e95dea7 SR |
461 | ret = copy_to_user(u64_to_uptr(a->rom), |
462 | client->device->config_rom, min(want, have)); | |
344bbc4d | 463 | } |
6e95dea7 | 464 | a->rom_length = client->device->config_rom_length * 4; |
344bbc4d | 465 | |
c9755e14 SR |
466 | up_read(&fw_device_rwsem); |
467 | ||
468 | if (ret != 0) | |
469 | return -EFAULT; | |
470 | ||
93b37905 SR |
471 | mutex_lock(&client->device->client_list_mutex); |
472 | ||
6e95dea7 SR |
473 | client->bus_reset_closure = a->bus_reset_closure; |
474 | if (a->bus_reset != 0) { | |
da8ecffa | 475 | fill_bus_reset_event(&bus_reset, client); |
790198f7 SR |
476 | /* unaligned size of bus_reset is 36 bytes */ |
477 | ret = copy_to_user(u64_to_uptr(a->bus_reset), &bus_reset, 36); | |
344bbc4d | 478 | } |
93b37905 SR |
479 | if (ret == 0 && list_empty(&client->link)) |
480 | list_add_tail(&client->link, &client->device->client_list); | |
19a15b93 | 481 | |
93b37905 SR |
482 | mutex_unlock(&client->device->client_list_mutex); |
483 | ||
484 | return ret ? -EFAULT : 0; | |
19a15b93 KH |
485 | } |
486 | ||
53dca511 SR |
487 | static int add_client_resource(struct client *client, |
488 | struct client_resource *resource, gfp_t gfp_mask) | |
3964a449 | 489 | { |
d0164adc | 490 | bool preload = gfpflags_allow_blocking(gfp_mask); |
3964a449 | 491 | unsigned long flags; |
45ee3199 JF |
492 | int ret; |
493 | ||
37b61890 TH |
494 | if (preload) |
495 | idr_preload(gfp_mask); | |
3964a449 | 496 | spin_lock_irqsave(&client->lock, flags); |
37b61890 | 497 | |
45ee3199 JF |
498 | if (client->in_shutdown) |
499 | ret = -ECANCELED; | |
500 | else | |
37b61890 TH |
501 | ret = idr_alloc(&client->resource_idr, resource, 0, 0, |
502 | GFP_NOWAIT); | |
b1bda4cd | 503 | if (ret >= 0) { |
37b61890 | 504 | resource->handle = ret; |
fb443036 | 505 | client_get(client); |
9fb551bf | 506 | schedule_if_iso_resource(resource); |
b1bda4cd | 507 | } |
45ee3199 | 508 | |
37b61890 TH |
509 | spin_unlock_irqrestore(&client->lock, flags); |
510 | if (preload) | |
511 | idr_preload_end(); | |
45ee3199 JF |
512 | |
513 | return ret < 0 ? ret : 0; | |
3964a449 KH |
514 | } |
515 | ||
53dca511 SR |
516 | static int release_client_resource(struct client *client, u32 handle, |
517 | client_resource_release_fn_t release, | |
e21fcf79 | 518 | struct client_resource **return_resource) |
3964a449 | 519 | { |
e21fcf79 | 520 | struct client_resource *resource; |
3964a449 | 521 | |
3ba94986 | 522 | spin_lock_irq(&client->lock); |
45ee3199 | 523 | if (client->in_shutdown) |
e21fcf79 | 524 | resource = NULL; |
45ee3199 | 525 | else |
e21fcf79 SR |
526 | resource = idr_find(&client->resource_idr, handle); |
527 | if (resource && resource->release == release) | |
45ee3199 | 528 | idr_remove(&client->resource_idr, handle); |
3ba94986 | 529 | spin_unlock_irq(&client->lock); |
3964a449 | 530 | |
e21fcf79 | 531 | if (!(resource && resource->release == release)) |
3964a449 KH |
532 | return -EINVAL; |
533 | ||
e21fcf79 SR |
534 | if (return_resource) |
535 | *return_resource = resource; | |
3964a449 | 536 | else |
e21fcf79 | 537 | resource->release(client, resource); |
3964a449 | 538 | |
fb443036 SR |
539 | client_put(client); |
540 | ||
3964a449 KH |
541 | return 0; |
542 | } | |
543 | ||
53dca511 SR |
544 | static void release_transaction(struct client *client, |
545 | struct client_resource *resource) | |
3964a449 | 546 | { |
3964a449 KH |
547 | } |
548 | ||
d8527cab TS |
549 | static void complete_transaction(struct fw_card *card, int rcode, u32 request_tstamp, |
550 | u32 response_tstamp, void *payload, size_t length, void *data) | |
19a15b93 | 551 | { |
97c18b7f | 552 | struct outbound_transaction_event *e = data; |
97c18b7f | 553 | struct client *client = e->client; |
28cf6a04 | 554 | unsigned long flags; |
19a15b93 | 555 | |
28cf6a04 | 556 | spin_lock_irqsave(&client->lock, flags); |
5a5e62da CL |
557 | idr_remove(&client->resource_idr, e->r.resource.handle); |
558 | if (client->in_shutdown) | |
559 | wake_up(&client->tx_flush_wait); | |
28cf6a04 KH |
560 | spin_unlock_irqrestore(&client->lock, flags); |
561 | ||
d8527cab TS |
562 | switch (e->rsp.without_tstamp.type) { |
563 | case FW_CDEV_EVENT_RESPONSE: | |
564 | { | |
565 | struct fw_cdev_event_response *rsp = &e->rsp.without_tstamp; | |
566 | ||
567 | if (length < rsp->length) | |
568 | rsp->length = length; | |
569 | if (rcode == RCODE_COMPLETE) | |
570 | memcpy(rsp->data, payload, rsp->length); | |
571 | ||
572 | rsp->rcode = rcode; | |
573 | ||
574 | // In the case that sizeof(*rsp) doesn't align with the position of the | |
575 | // data, and the read is short, preserve an extra copy of the data | |
576 | // to stay compatible with a pre-2.6.27 bug. Since the bug is harmless | |
577 | // for short reads and some apps depended on it, this is both safe | |
578 | // and prudent for compatibility. | |
579 | if (rsp->length <= sizeof(*rsp) - offsetof(typeof(*rsp), data)) | |
580 | queue_event(client, &e->event, rsp, sizeof(*rsp), rsp->data, rsp->length); | |
581 | else | |
582 | queue_event(client, &e->event, rsp, sizeof(*rsp) + rsp->length, NULL, 0); | |
583 | ||
584 | break; | |
585 | } | |
586 | case FW_CDEV_EVENT_RESPONSE2: | |
587 | { | |
588 | struct fw_cdev_event_response2 *rsp = &e->rsp.with_tstamp; | |
589 | ||
590 | if (length < rsp->length) | |
591 | rsp->length = length; | |
592 | if (rcode == RCODE_COMPLETE) | |
593 | memcpy(rsp->data, payload, rsp->length); | |
594 | ||
595 | rsp->rcode = rcode; | |
596 | rsp->request_tstamp = request_tstamp; | |
597 | rsp->response_tstamp = response_tstamp; | |
598 | ||
599 | queue_event(client, &e->event, rsp, sizeof(*rsp) + rsp->length, NULL, 0); | |
600 | ||
601 | break; | |
602 | default: | |
603 | WARN_ON(1); | |
604 | break; | |
605 | } | |
606 | } | |
fb443036 | 607 | |
5a5e62da CL |
608 | /* Drop the idr's reference */ |
609 | client_put(client); | |
19a15b93 KH |
610 | } |
611 | ||
acfe8333 JFSR |
612 | static int init_request(struct client *client, |
613 | struct fw_cdev_send_request *request, | |
614 | int destination_id, int speed) | |
19a15b93 | 615 | { |
97c18b7f | 616 | struct outbound_transaction_event *e; |
147e9d3a | 617 | void *payload; |
1f3125af | 618 | int ret; |
19a15b93 | 619 | |
18e9b10f SR |
620 | if (request->tcode != TCODE_STREAM_DATA && |
621 | (request->length > 4096 || request->length > 512 << speed)) | |
5d3fd692 | 622 | return -EIO; |
19a15b93 | 623 | |
a8e93f3d CL |
624 | if (request->tcode == TCODE_WRITE_QUADLET_REQUEST && |
625 | request->length < 4) | |
626 | return -EINVAL; | |
627 | ||
97c18b7f SR |
628 | e = kmalloc(sizeof(*e) + request->length, GFP_KERNEL); |
629 | if (e == NULL) | |
19a15b93 | 630 | return -ENOMEM; |
97c18b7f | 631 | e->client = client; |
19a15b93 | 632 | |
d8527cab TS |
633 | if (client->version < FW_CDEV_VERSION_EVENT_ASYNC_TSTAMP) { |
634 | struct fw_cdev_event_response *rsp = &e->rsp.without_tstamp; | |
635 | ||
636 | rsp->type = FW_CDEV_EVENT_RESPONSE; | |
637 | rsp->length = request->length; | |
638 | rsp->closure = request->closure; | |
639 | payload = rsp->data; | |
640 | } else { | |
641 | struct fw_cdev_event_response2 *rsp = &e->rsp.with_tstamp; | |
642 | ||
643 | rsp->type = FW_CDEV_EVENT_RESPONSE2; | |
644 | rsp->length = request->length; | |
645 | rsp->closure = request->closure; | |
646 | payload = rsp->data; | |
647 | } | |
147e9d3a TS |
648 | |
649 | if (request->data && copy_from_user(payload, u64_to_uptr(request->data), request->length)) { | |
1f3125af | 650 | ret = -EFAULT; |
45ee3199 | 651 | goto failed; |
1f3125af SR |
652 | } |
653 | ||
97c18b7f SR |
654 | e->r.resource.release = release_transaction; |
655 | ret = add_client_resource(client, &e->r.resource, GFP_KERNEL); | |
45ee3199 JF |
656 | if (ret < 0) |
657 | goto failed; | |
28cf6a04 | 658 | |
d8527cab TS |
659 | fw_send_request_with_tstamp(client->device->card, &e->r.transaction, request->tcode, |
660 | destination_id, request->generation, speed, request->offset, | |
661 | payload, request->length, complete_transaction, e); | |
664d8010 | 662 | return 0; |
19a15b93 | 663 | |
45ee3199 | 664 | failed: |
97c18b7f | 665 | kfree(e); |
1f3125af SR |
666 | |
667 | return ret; | |
19a15b93 KH |
668 | } |
669 | ||
6e95dea7 | 670 | static int ioctl_send_request(struct client *client, union ioctl_arg *arg) |
acfe8333 | 671 | { |
6e95dea7 | 672 | switch (arg->send_request.tcode) { |
acfe8333 JFSR |
673 | case TCODE_WRITE_QUADLET_REQUEST: |
674 | case TCODE_WRITE_BLOCK_REQUEST: | |
675 | case TCODE_READ_QUADLET_REQUEST: | |
676 | case TCODE_READ_BLOCK_REQUEST: | |
677 | case TCODE_LOCK_MASK_SWAP: | |
678 | case TCODE_LOCK_COMPARE_SWAP: | |
679 | case TCODE_LOCK_FETCH_ADD: | |
680 | case TCODE_LOCK_LITTLE_ADD: | |
681 | case TCODE_LOCK_BOUNDED_ADD: | |
682 | case TCODE_LOCK_WRAP_ADD: | |
683 | case TCODE_LOCK_VENDOR_DEPENDENT: | |
684 | break; | |
685 | default: | |
686 | return -EINVAL; | |
687 | } | |
688 | ||
6e95dea7 | 689 | return init_request(client, &arg->send_request, client->device->node_id, |
acfe8333 JFSR |
690 | client->device->max_speed); |
691 | } | |
692 | ||
53dca511 SR |
693 | static void release_request(struct client *client, |
694 | struct client_resource *resource) | |
3964a449 | 695 | { |
97c18b7f SR |
696 | struct inbound_transaction_resource *r = container_of(resource, |
697 | struct inbound_transaction_resource, resource); | |
3964a449 | 698 | |
e6996002 | 699 | if (r->is_fcp) |
39859be8 | 700 | fw_request_put(r->request); |
281e2032 | 701 | else |
08bd34c9 | 702 | fw_send_response(r->card, r->request, RCODE_CONFLICT_ERROR); |
0244f573 SR |
703 | |
704 | fw_card_put(r->card); | |
97c18b7f | 705 | kfree(r); |
3964a449 KH |
706 | } |
707 | ||
97c18b7f | 708 | static void handle_request(struct fw_card *card, struct fw_request *request, |
53dca511 | 709 | int tcode, int destination, int source, |
33e553fe | 710 | int generation, unsigned long long offset, |
53dca511 | 711 | void *payload, size_t length, void *callback_data) |
19a15b93 | 712 | { |
97c18b7f | 713 | struct address_handler_resource *handler = callback_data; |
e6996002 | 714 | bool is_fcp = is_in_fcp_region(offset, length); |
97c18b7f SR |
715 | struct inbound_transaction_resource *r; |
716 | struct inbound_transaction_event *e; | |
e205597d | 717 | size_t event_size0; |
45ee3199 | 718 | int ret; |
19a15b93 | 719 | |
0244f573 SR |
720 | /* card may be different from handler->client->device->card */ |
721 | fw_card_get(card); | |
722 | ||
39859be8 TS |
723 | // Extend the lifetime of data for request so that its payload is safely accessible in |
724 | // the process context for the client. | |
725 | if (is_fcp) | |
726 | fw_request_get(request); | |
727 | ||
97c18b7f | 728 | r = kmalloc(sizeof(*r), GFP_ATOMIC); |
2d826cc5 | 729 | e = kmalloc(sizeof(*e), GFP_ATOMIC); |
cfb0c9d1 | 730 | if (r == NULL || e == NULL) |
45ee3199 | 731 | goto failed; |
cfb0c9d1 | 732 | |
08bd34c9 | 733 | r->card = card; |
97c18b7f | 734 | r->request = request; |
e6996002 | 735 | r->is_fcp = is_fcp; |
97c18b7f SR |
736 | r->data = payload; |
737 | r->length = length; | |
19a15b93 | 738 | |
97c18b7f SR |
739 | r->resource.release = release_request; |
740 | ret = add_client_resource(handler->client, &r->resource, GFP_ATOMIC); | |
45ee3199 JF |
741 | if (ret < 0) |
742 | goto failed; | |
19a15b93 | 743 | |
e205597d SR |
744 | if (handler->client->version < FW_CDEV_VERSION_EVENT_REQUEST2) { |
745 | struct fw_cdev_event_request *req = &e->req.request; | |
746 | ||
747 | if (tcode & 0x10) | |
748 | tcode = TCODE_LOCK_REQUEST; | |
749 | ||
750 | req->type = FW_CDEV_EVENT_REQUEST; | |
751 | req->tcode = tcode; | |
752 | req->offset = offset; | |
753 | req->length = length; | |
754 | req->handle = r->resource.handle; | |
755 | req->closure = handler->closure; | |
756 | event_size0 = sizeof(*req); | |
865efffb | 757 | } else if (handler->client->version < FW_CDEV_VERSION_EVENT_ASYNC_TSTAMP) { |
e205597d SR |
758 | struct fw_cdev_event_request2 *req = &e->req.request2; |
759 | ||
760 | req->type = FW_CDEV_EVENT_REQUEST2; | |
761 | req->tcode = tcode; | |
762 | req->offset = offset; | |
763 | req->source_node_id = source; | |
764 | req->destination_node_id = destination; | |
765 | req->card = card->index; | |
766 | req->generation = generation; | |
767 | req->length = length; | |
768 | req->handle = r->resource.handle; | |
769 | req->closure = handler->closure; | |
770 | event_size0 = sizeof(*req); | |
865efffb TS |
771 | } else { |
772 | struct fw_cdev_event_request3 *req = &e->req.with_tstamp; | |
773 | ||
774 | req->type = FW_CDEV_EVENT_REQUEST3; | |
775 | req->tcode = tcode; | |
776 | req->offset = offset; | |
777 | req->source_node_id = source; | |
778 | req->destination_node_id = destination; | |
779 | req->card = card->index; | |
780 | req->generation = generation; | |
781 | req->length = length; | |
782 | req->handle = r->resource.handle; | |
783 | req->closure = handler->closure; | |
784 | req->tstamp = fw_request_get_timestamp(request); | |
785 | event_size0 = sizeof(*req); | |
e205597d | 786 | } |
19a15b93 | 787 | |
97c18b7f | 788 | queue_event(handler->client, &e->event, |
e205597d | 789 | &e->req, event_size0, r->data, length); |
45ee3199 JF |
790 | return; |
791 | ||
792 | failed: | |
97c18b7f | 793 | kfree(r); |
45ee3199 | 794 | kfree(e); |
281e2032 | 795 | |
e6996002 | 796 | if (!is_fcp) |
db5d247a | 797 | fw_send_response(card, request, RCODE_CONFLICT_ERROR); |
39859be8 TS |
798 | else |
799 | fw_request_put(request); | |
0244f573 SR |
800 | |
801 | fw_card_put(card); | |
19a15b93 KH |
802 | } |
803 | ||
53dca511 SR |
804 | static void release_address_handler(struct client *client, |
805 | struct client_resource *resource) | |
3964a449 | 806 | { |
97c18b7f SR |
807 | struct address_handler_resource *r = |
808 | container_of(resource, struct address_handler_resource, resource); | |
3964a449 | 809 | |
97c18b7f SR |
810 | fw_core_remove_address_handler(&r->handler); |
811 | kfree(r); | |
3964a449 KH |
812 | } |
813 | ||
6e95dea7 | 814 | static int ioctl_allocate(struct client *client, union ioctl_arg *arg) |
19a15b93 | 815 | { |
6e95dea7 | 816 | struct fw_cdev_allocate *a = &arg->allocate; |
97c18b7f | 817 | struct address_handler_resource *r; |
19a15b93 | 818 | struct fw_address_region region; |
45ee3199 | 819 | int ret; |
19a15b93 | 820 | |
97c18b7f SR |
821 | r = kmalloc(sizeof(*r), GFP_KERNEL); |
822 | if (r == NULL) | |
19a15b93 KH |
823 | return -ENOMEM; |
824 | ||
6e95dea7 | 825 | region.start = a->offset; |
8e2b2b46 SR |
826 | if (client->version < FW_CDEV_VERSION_ALLOCATE_REGION_END) |
827 | region.end = a->offset + a->length; | |
828 | else | |
829 | region.end = a->region_end; | |
830 | ||
6e95dea7 | 831 | r->handler.length = a->length; |
97c18b7f | 832 | r->handler.address_callback = handle_request; |
6e95dea7 SR |
833 | r->handler.callback_data = r; |
834 | r->closure = a->closure; | |
835 | r->client = client; | |
19a15b93 | 836 | |
97c18b7f | 837 | ret = fw_core_add_address_handler(&r->handler, ®ion); |
3e0b5f0d | 838 | if (ret < 0) { |
97c18b7f | 839 | kfree(r); |
3e0b5f0d | 840 | return ret; |
19a15b93 | 841 | } |
8e2b2b46 | 842 | a->offset = r->handler.offset; |
19a15b93 | 843 | |
97c18b7f SR |
844 | r->resource.release = release_address_handler; |
845 | ret = add_client_resource(client, &r->resource, GFP_KERNEL); | |
45ee3199 | 846 | if (ret < 0) { |
97c18b7f | 847 | release_address_handler(client, &r->resource); |
45ee3199 JF |
848 | return ret; |
849 | } | |
6e95dea7 | 850 | a->handle = r->resource.handle; |
19a15b93 KH |
851 | |
852 | return 0; | |
853 | } | |
854 | ||
6e95dea7 | 855 | static int ioctl_deallocate(struct client *client, union ioctl_arg *arg) |
9472316b | 856 | { |
6e95dea7 | 857 | return release_client_resource(client, arg->deallocate.handle, |
45ee3199 | 858 | release_address_handler, NULL); |
9472316b KH |
859 | } |
860 | ||
6e95dea7 | 861 | static int ioctl_send_response(struct client *client, union ioctl_arg *arg) |
19a15b93 | 862 | { |
6e95dea7 | 863 | struct fw_cdev_send_response *a = &arg->send_response; |
3964a449 | 864 | struct client_resource *resource; |
97c18b7f | 865 | struct inbound_transaction_resource *r; |
7e44c0b5 | 866 | int ret = 0; |
19a15b93 | 867 | |
6e95dea7 | 868 | if (release_client_resource(client, a->handle, |
45ee3199 | 869 | release_request, &resource) < 0) |
19a15b93 | 870 | return -EINVAL; |
45ee3199 | 871 | |
97c18b7f SR |
872 | r = container_of(resource, struct inbound_transaction_resource, |
873 | resource); | |
e6996002 | 874 | if (r->is_fcp) { |
39859be8 | 875 | fw_request_put(r->request); |
281e2032 | 876 | goto out; |
531390a2 | 877 | } |
281e2032 | 878 | |
a10c0ce7 CL |
879 | if (a->length != fw_get_response_length(r->request)) { |
880 | ret = -EINVAL; | |
13a55d6b | 881 | fw_request_put(r->request); |
a10c0ce7 CL |
882 | goto out; |
883 | } | |
884 | if (copy_from_user(r->data, u64_to_uptr(a->data), a->length)) { | |
281e2032 | 885 | ret = -EFAULT; |
13a55d6b | 886 | fw_request_put(r->request); |
281e2032 | 887 | goto out; |
7e44c0b5 | 888 | } |
08bd34c9 | 889 | fw_send_response(r->card, r->request, a->rcode); |
7e44c0b5 | 890 | out: |
0244f573 | 891 | fw_card_put(r->card); |
19a15b93 KH |
892 | kfree(r); |
893 | ||
7e44c0b5 | 894 | return ret; |
19a15b93 KH |
895 | } |
896 | ||
6e95dea7 | 897 | static int ioctl_initiate_bus_reset(struct client *client, union ioctl_arg *arg) |
5371842b | 898 | { |
02d37bed | 899 | fw_schedule_bus_reset(client->device->card, true, |
6e95dea7 | 900 | arg->initiate_bus_reset.type == FW_CDEV_SHORT_RESET); |
02d37bed | 901 | return 0; |
5371842b KH |
902 | } |
903 | ||
3964a449 KH |
904 | static void release_descriptor(struct client *client, |
905 | struct client_resource *resource) | |
906 | { | |
97c18b7f SR |
907 | struct descriptor_resource *r = |
908 | container_of(resource, struct descriptor_resource, resource); | |
3964a449 | 909 | |
97c18b7f SR |
910 | fw_core_remove_descriptor(&r->descriptor); |
911 | kfree(r); | |
3964a449 KH |
912 | } |
913 | ||
6e95dea7 | 914 | static int ioctl_add_descriptor(struct client *client, union ioctl_arg *arg) |
66dea3e5 | 915 | { |
6e95dea7 | 916 | struct fw_cdev_add_descriptor *a = &arg->add_descriptor; |
97c18b7f | 917 | struct descriptor_resource *r; |
45ee3199 | 918 | int ret; |
66dea3e5 | 919 | |
de487da8 | 920 | /* Access policy: Allow this ioctl only on local nodes' device files. */ |
92368890 | 921 | if (!client->device->is_local) |
de487da8 SR |
922 | return -ENOSYS; |
923 | ||
6e95dea7 | 924 | if (a->length > 256) |
66dea3e5 KH |
925 | return -EINVAL; |
926 | ||
6e95dea7 | 927 | r = kmalloc(sizeof(*r) + a->length * 4, GFP_KERNEL); |
97c18b7f | 928 | if (r == NULL) |
66dea3e5 KH |
929 | return -ENOMEM; |
930 | ||
6e95dea7 | 931 | if (copy_from_user(r->data, u64_to_uptr(a->data), a->length * 4)) { |
45ee3199 JF |
932 | ret = -EFAULT; |
933 | goto failed; | |
66dea3e5 KH |
934 | } |
935 | ||
6e95dea7 SR |
936 | r->descriptor.length = a->length; |
937 | r->descriptor.immediate = a->immediate; | |
938 | r->descriptor.key = a->key; | |
97c18b7f | 939 | r->descriptor.data = r->data; |
66dea3e5 | 940 | |
97c18b7f | 941 | ret = fw_core_add_descriptor(&r->descriptor); |
45ee3199 JF |
942 | if (ret < 0) |
943 | goto failed; | |
66dea3e5 | 944 | |
97c18b7f SR |
945 | r->resource.release = release_descriptor; |
946 | ret = add_client_resource(client, &r->resource, GFP_KERNEL); | |
45ee3199 | 947 | if (ret < 0) { |
97c18b7f | 948 | fw_core_remove_descriptor(&r->descriptor); |
45ee3199 JF |
949 | goto failed; |
950 | } | |
6e95dea7 | 951 | a->handle = r->resource.handle; |
66dea3e5 KH |
952 | |
953 | return 0; | |
45ee3199 | 954 | failed: |
97c18b7f | 955 | kfree(r); |
45ee3199 JF |
956 | |
957 | return ret; | |
66dea3e5 KH |
958 | } |
959 | ||
6e95dea7 | 960 | static int ioctl_remove_descriptor(struct client *client, union ioctl_arg *arg) |
66dea3e5 | 961 | { |
6e95dea7 | 962 | return release_client_resource(client, arg->remove_descriptor.handle, |
45ee3199 | 963 | release_descriptor, NULL); |
66dea3e5 KH |
964 | } |
965 | ||
53dca511 SR |
966 | static void iso_callback(struct fw_iso_context *context, u32 cycle, |
967 | size_t header_length, void *header, void *data) | |
19a15b93 KH |
968 | { |
969 | struct client *client = data; | |
97c18b7f | 970 | struct iso_interrupt_event *e; |
19a15b93 | 971 | |
56d04cb1 | 972 | e = kmalloc(sizeof(*e) + header_length, GFP_ATOMIC); |
cfb0c9d1 | 973 | if (e == NULL) |
19a15b93 | 974 | return; |
cfb0c9d1 | 975 | |
97c18b7f SR |
976 | e->interrupt.type = FW_CDEV_EVENT_ISO_INTERRUPT; |
977 | e->interrupt.closure = client->iso_closure; | |
978 | e->interrupt.cycle = cycle; | |
979 | e->interrupt.header_length = header_length; | |
980 | memcpy(e->interrupt.header, header, header_length); | |
981 | queue_event(client, &e->event, &e->interrupt, | |
982 | sizeof(e->interrupt) + header_length, NULL, 0); | |
19a15b93 KH |
983 | } |
984 | ||
872e330e SR |
985 | static void iso_mc_callback(struct fw_iso_context *context, |
986 | dma_addr_t completed, void *data) | |
987 | { | |
988 | struct client *client = data; | |
989 | struct iso_interrupt_mc_event *e; | |
990 | ||
991 | e = kmalloc(sizeof(*e), GFP_ATOMIC); | |
cfb0c9d1 | 992 | if (e == NULL) |
872e330e | 993 | return; |
cfb0c9d1 | 994 | |
872e330e SR |
995 | e->interrupt.type = FW_CDEV_EVENT_ISO_INTERRUPT_MULTICHANNEL; |
996 | e->interrupt.closure = client->iso_closure; | |
997 | e->interrupt.completed = fw_iso_buffer_lookup(&client->buffer, | |
998 | completed); | |
999 | queue_event(client, &e->event, &e->interrupt, | |
1000 | sizeof(e->interrupt), NULL, 0); | |
1001 | } | |
1002 | ||
0b6c4857 SR |
1003 | static enum dma_data_direction iso_dma_direction(struct fw_iso_context *context) |
1004 | { | |
1005 | if (context->type == FW_ISO_CONTEXT_TRANSMIT) | |
1006 | return DMA_TO_DEVICE; | |
1007 | else | |
1008 | return DMA_FROM_DEVICE; | |
1009 | } | |
1010 | ||
ebe4560e OC |
1011 | static struct fw_iso_context *fw_iso_mc_context_create(struct fw_card *card, |
1012 | fw_iso_mc_callback_t callback, | |
1013 | void *callback_data) | |
1014 | { | |
1015 | struct fw_iso_context *ctx; | |
1016 | ||
1017 | ctx = fw_iso_context_create(card, FW_ISO_CONTEXT_RECEIVE_MULTICHANNEL, | |
1018 | 0, 0, 0, NULL, callback_data); | |
1019 | if (!IS_ERR(ctx)) | |
1020 | ctx->callback.mc = callback; | |
1021 | ||
1022 | return ctx; | |
1023 | } | |
1024 | ||
6e95dea7 | 1025 | static int ioctl_create_iso_context(struct client *client, union ioctl_arg *arg) |
19a15b93 | 1026 | { |
6e95dea7 | 1027 | struct fw_cdev_create_iso_context *a = &arg->create_iso_context; |
24315c5e | 1028 | struct fw_iso_context *context; |
ebe4560e | 1029 | union fw_iso_callback cb; |
0b6c4857 | 1030 | int ret; |
19a15b93 | 1031 | |
eb5b35a5 | 1032 | BUILD_BUG_ON(FW_CDEV_ISO_CONTEXT_TRANSMIT != FW_ISO_CONTEXT_TRANSMIT || |
872e330e SR |
1033 | FW_CDEV_ISO_CONTEXT_RECEIVE != FW_ISO_CONTEXT_RECEIVE || |
1034 | FW_CDEV_ISO_CONTEXT_RECEIVE_MULTICHANNEL != | |
1035 | FW_ISO_CONTEXT_RECEIVE_MULTICHANNEL); | |
21efb3cf | 1036 | |
6e95dea7 | 1037 | switch (a->type) { |
872e330e SR |
1038 | case FW_ISO_CONTEXT_TRANSMIT: |
1039 | if (a->speed > SCODE_3200 || a->channel > 63) | |
c70dc788 | 1040 | return -EINVAL; |
872e330e | 1041 | |
ebe4560e | 1042 | cb.sc = iso_callback; |
c70dc788 KH |
1043 | break; |
1044 | ||
872e330e SR |
1045 | case FW_ISO_CONTEXT_RECEIVE: |
1046 | if (a->header_size < 4 || (a->header_size & 3) || | |
1047 | a->channel > 63) | |
c70dc788 | 1048 | return -EINVAL; |
872e330e | 1049 | |
ebe4560e | 1050 | cb.sc = iso_callback; |
872e330e SR |
1051 | break; |
1052 | ||
1053 | case FW_ISO_CONTEXT_RECEIVE_MULTICHANNEL: | |
ebe4560e | 1054 | cb.mc = iso_mc_callback; |
c70dc788 KH |
1055 | break; |
1056 | ||
1057 | default: | |
21efb3cf | 1058 | return -EINVAL; |
c70dc788 KH |
1059 | } |
1060 | ||
ebe4560e OC |
1061 | if (a->type == FW_ISO_CONTEXT_RECEIVE_MULTICHANNEL) |
1062 | context = fw_iso_mc_context_create(client->device->card, cb.mc, | |
1063 | client); | |
1064 | else | |
1065 | context = fw_iso_context_create(client->device->card, a->type, | |
1066 | a->channel, a->speed, | |
1067 | a->header_size, cb.sc, client); | |
24315c5e KH |
1068 | if (IS_ERR(context)) |
1069 | return PTR_ERR(context); | |
0699a73a CL |
1070 | if (client->version < FW_CDEV_VERSION_AUTO_FLUSH_ISO_OVERFLOW) |
1071 | context->drop_overflow_headers = true; | |
24315c5e | 1072 | |
bdfe273e CL |
1073 | /* We only support one context at this time. */ |
1074 | spin_lock_irq(&client->lock); | |
1075 | if (client->iso_context != NULL) { | |
1076 | spin_unlock_irq(&client->lock); | |
1077 | fw_iso_context_destroy(context); | |
0b6c4857 | 1078 | |
bdfe273e CL |
1079 | return -EBUSY; |
1080 | } | |
0b6c4857 SR |
1081 | if (!client->buffer_is_mapped) { |
1082 | ret = fw_iso_buffer_map_dma(&client->buffer, | |
1083 | client->device->card, | |
1084 | iso_dma_direction(context)); | |
1085 | if (ret < 0) { | |
1086 | spin_unlock_irq(&client->lock); | |
1087 | fw_iso_context_destroy(context); | |
1088 | ||
1089 | return ret; | |
1090 | } | |
1091 | client->buffer_is_mapped = true; | |
1092 | } | |
6e95dea7 | 1093 | client->iso_closure = a->closure; |
24315c5e | 1094 | client->iso_context = context; |
bdfe273e | 1095 | spin_unlock_irq(&client->lock); |
19a15b93 | 1096 | |
6e95dea7 | 1097 | a->handle = 0; |
abaa5743 | 1098 | |
19a15b93 KH |
1099 | return 0; |
1100 | } | |
1101 | ||
872e330e SR |
1102 | static int ioctl_set_iso_channels(struct client *client, union ioctl_arg *arg) |
1103 | { | |
1104 | struct fw_cdev_set_iso_channels *a = &arg->set_iso_channels; | |
1105 | struct fw_iso_context *ctx = client->iso_context; | |
1106 | ||
1107 | if (ctx == NULL || a->handle != 0) | |
1108 | return -EINVAL; | |
1109 | ||
1110 | return fw_iso_context_set_channels(ctx, &a->channels); | |
1111 | } | |
1112 | ||
1ca31ae7 KH |
1113 | /* Macros for decoding the iso packet control header. */ |
1114 | #define GET_PAYLOAD_LENGTH(v) ((v) & 0xffff) | |
1115 | #define GET_INTERRUPT(v) (((v) >> 16) & 0x01) | |
1116 | #define GET_SKIP(v) (((v) >> 17) & 0x01) | |
7a100344 SR |
1117 | #define GET_TAG(v) (((v) >> 18) & 0x03) |
1118 | #define GET_SY(v) (((v) >> 20) & 0x0f) | |
1ca31ae7 KH |
1119 | #define GET_HEADER_LENGTH(v) (((v) >> 24) & 0xff) |
1120 | ||
6e95dea7 | 1121 | static int ioctl_queue_iso(struct client *client, union ioctl_arg *arg) |
19a15b93 | 1122 | { |
6e95dea7 | 1123 | struct fw_cdev_queue_iso *a = &arg->queue_iso; |
19a15b93 | 1124 | struct fw_cdev_iso_packet __user *p, *end, *next; |
9b32d5f3 | 1125 | struct fw_iso_context *ctx = client->iso_context; |
872e330e | 1126 | unsigned long payload, buffer_end, transmit_header_bytes = 0; |
1ca31ae7 | 1127 | u32 control; |
19a15b93 KH |
1128 | int count; |
1129 | struct { | |
1130 | struct fw_iso_packet packet; | |
1131 | u8 header[256]; | |
1132 | } u; | |
1133 | ||
6e95dea7 | 1134 | if (ctx == NULL || a->handle != 0) |
19a15b93 | 1135 | return -EINVAL; |
19a15b93 | 1136 | |
c781c06d KH |
1137 | /* |
1138 | * If the user passes a non-NULL data pointer, has mmap()'ed | |
19a15b93 KH |
1139 | * the iso buffer, and the pointer points inside the buffer, |
1140 | * we setup the payload pointers accordingly. Otherwise we | |
9aad8125 | 1141 | * set them both to 0, which will still let packets with |
19a15b93 KH |
1142 | * payload_length == 0 through. In other words, if no packets |
1143 | * use the indirect payload, the iso buffer need not be mapped | |
6e95dea7 | 1144 | * and the a->data pointer is ignored. |
c781c06d | 1145 | */ |
6e95dea7 | 1146 | payload = (unsigned long)a->data - client->vm_start; |
ef370ee7 | 1147 | buffer_end = client->buffer.page_count << PAGE_SHIFT; |
6e95dea7 | 1148 | if (a->data == 0 || client->buffer.pages == NULL || |
ef370ee7 | 1149 | payload >= buffer_end) { |
9aad8125 | 1150 | payload = 0; |
ef370ee7 | 1151 | buffer_end = 0; |
19a15b93 KH |
1152 | } |
1153 | ||
872e330e SR |
1154 | if (ctx->type == FW_ISO_CONTEXT_RECEIVE_MULTICHANNEL && payload & 3) |
1155 | return -EINVAL; | |
1ccc9147 | 1156 | |
872e330e | 1157 | p = (struct fw_cdev_iso_packet __user *)u64_to_uptr(a->packets); |
19a15b93 | 1158 | |
6e95dea7 | 1159 | end = (void __user *)p + a->size; |
19a15b93 KH |
1160 | count = 0; |
1161 | while (p < end) { | |
1ca31ae7 | 1162 | if (get_user(control, &p->control)) |
19a15b93 | 1163 | return -EFAULT; |
1ca31ae7 KH |
1164 | u.packet.payload_length = GET_PAYLOAD_LENGTH(control); |
1165 | u.packet.interrupt = GET_INTERRUPT(control); | |
1166 | u.packet.skip = GET_SKIP(control); | |
1167 | u.packet.tag = GET_TAG(control); | |
1168 | u.packet.sy = GET_SY(control); | |
1169 | u.packet.header_length = GET_HEADER_LENGTH(control); | |
295e3feb | 1170 | |
872e330e SR |
1171 | switch (ctx->type) { |
1172 | case FW_ISO_CONTEXT_TRANSMIT: | |
1173 | if (u.packet.header_length & 3) | |
385ab5bc | 1174 | return -EINVAL; |
ae2a9766 | 1175 | transmit_header_bytes = u.packet.header_length; |
872e330e SR |
1176 | break; |
1177 | ||
1178 | case FW_ISO_CONTEXT_RECEIVE: | |
69e61d0c SR |
1179 | if (u.packet.header_length == 0 || |
1180 | u.packet.header_length % ctx->header_size != 0) | |
385ab5bc | 1181 | return -EINVAL; |
872e330e SR |
1182 | break; |
1183 | ||
1184 | case FW_ISO_CONTEXT_RECEIVE_MULTICHANNEL: | |
1185 | if (u.packet.payload_length == 0 || | |
1186 | u.packet.payload_length & 3) | |
295e3feb | 1187 | return -EINVAL; |
872e330e | 1188 | break; |
295e3feb KH |
1189 | } |
1190 | ||
19a15b93 | 1191 | next = (struct fw_cdev_iso_packet __user *) |
ae2a9766 | 1192 | &p->header[transmit_header_bytes / 4]; |
19a15b93 KH |
1193 | if (next > end) |
1194 | return -EINVAL; | |
daa98831 | 1195 | if (copy_from_user |
ae2a9766 | 1196 | (u.packet.header, p->header, transmit_header_bytes)) |
19a15b93 | 1197 | return -EFAULT; |
98b6cbe8 | 1198 | if (u.packet.skip && ctx->type == FW_ISO_CONTEXT_TRANSMIT && |
19a15b93 KH |
1199 | u.packet.header_length + u.packet.payload_length > 0) |
1200 | return -EINVAL; | |
ef370ee7 | 1201 | if (payload + u.packet.payload_length > buffer_end) |
19a15b93 KH |
1202 | return -EINVAL; |
1203 | ||
9b32d5f3 KH |
1204 | if (fw_iso_context_queue(ctx, &u.packet, |
1205 | &client->buffer, payload)) | |
19a15b93 KH |
1206 | break; |
1207 | ||
1208 | p = next; | |
1209 | payload += u.packet.payload_length; | |
1210 | count++; | |
1211 | } | |
13882a82 | 1212 | fw_iso_context_queue_flush(ctx); |
19a15b93 | 1213 | |
6e95dea7 SR |
1214 | a->size -= uptr_to_u64(p) - a->packets; |
1215 | a->packets = uptr_to_u64(p); | |
1216 | a->data = client->vm_start + payload; | |
19a15b93 KH |
1217 | |
1218 | return count; | |
1219 | } | |
1220 | ||
6e95dea7 | 1221 | static int ioctl_start_iso(struct client *client, union ioctl_arg *arg) |
19a15b93 | 1222 | { |
6e95dea7 | 1223 | struct fw_cdev_start_iso *a = &arg->start_iso; |
19a15b93 | 1224 | |
eb5b35a5 SR |
1225 | BUILD_BUG_ON( |
1226 | FW_CDEV_ISO_CONTEXT_MATCH_TAG0 != FW_ISO_CONTEXT_MATCH_TAG0 || | |
1227 | FW_CDEV_ISO_CONTEXT_MATCH_TAG1 != FW_ISO_CONTEXT_MATCH_TAG1 || | |
1228 | FW_CDEV_ISO_CONTEXT_MATCH_TAG2 != FW_ISO_CONTEXT_MATCH_TAG2 || | |
1229 | FW_CDEV_ISO_CONTEXT_MATCH_TAG3 != FW_ISO_CONTEXT_MATCH_TAG3 || | |
1230 | FW_CDEV_ISO_CONTEXT_MATCH_ALL_TAGS != FW_ISO_CONTEXT_MATCH_ALL_TAGS); | |
1231 | ||
6e95dea7 | 1232 | if (client->iso_context == NULL || a->handle != 0) |
abaa5743 | 1233 | return -EINVAL; |
fae60312 | 1234 | |
6e95dea7 SR |
1235 | if (client->iso_context->type == FW_ISO_CONTEXT_RECEIVE && |
1236 | (a->tags == 0 || a->tags > 15 || a->sync > 15)) | |
1237 | return -EINVAL; | |
eb0306ea | 1238 | |
6e95dea7 SR |
1239 | return fw_iso_context_start(client->iso_context, |
1240 | a->cycle, a->sync, a->tags); | |
19a15b93 KH |
1241 | } |
1242 | ||
6e95dea7 | 1243 | static int ioctl_stop_iso(struct client *client, union ioctl_arg *arg) |
b8295668 | 1244 | { |
6e95dea7 | 1245 | struct fw_cdev_stop_iso *a = &arg->stop_iso; |
abaa5743 | 1246 | |
6e95dea7 | 1247 | if (client->iso_context == NULL || a->handle != 0) |
abaa5743 KH |
1248 | return -EINVAL; |
1249 | ||
b8295668 KH |
1250 | return fw_iso_context_stop(client->iso_context); |
1251 | } | |
1252 | ||
d1bbd209 CL |
1253 | static int ioctl_flush_iso(struct client *client, union ioctl_arg *arg) |
1254 | { | |
1255 | struct fw_cdev_flush_iso *a = &arg->flush_iso; | |
1256 | ||
1257 | if (client->iso_context == NULL || a->handle != 0) | |
1258 | return -EINVAL; | |
1259 | ||
1260 | return fw_iso_context_flush_completions(client->iso_context); | |
1261 | } | |
1262 | ||
6e95dea7 | 1263 | static int ioctl_get_cycle_timer2(struct client *client, union ioctl_arg *arg) |
a64408b9 | 1264 | { |
6e95dea7 | 1265 | struct fw_cdev_get_cycle_timer2 *a = &arg->get_cycle_timer2; |
a64408b9 | 1266 | struct fw_card *card = client->device->card; |
2c1bb29a | 1267 | struct timespec64 ts = {0, 0}; |
dda8ad0a | 1268 | u32 cycle_time = 0; |
abfe5a01 | 1269 | int ret = 0; |
a64408b9 | 1270 | |
4a9bde9b | 1271 | local_irq_disable(); |
a64408b9 | 1272 | |
baa914cd TS |
1273 | ret = fw_card_read_cycle_time(card, &cycle_time); |
1274 | if (ret < 0) | |
1275 | goto end; | |
abfe5a01 | 1276 | |
6e95dea7 | 1277 | switch (a->clk_id) { |
2c1bb29a AB |
1278 | case CLOCK_REALTIME: ktime_get_real_ts64(&ts); break; |
1279 | case CLOCK_MONOTONIC: ktime_get_ts64(&ts); break; | |
1280 | case CLOCK_MONOTONIC_RAW: ktime_get_raw_ts64(&ts); break; | |
abfe5a01 SR |
1281 | default: |
1282 | ret = -EINVAL; | |
1283 | } | |
baa914cd | 1284 | end: |
4a9bde9b | 1285 | local_irq_enable(); |
a64408b9 | 1286 | |
6e95dea7 SR |
1287 | a->tv_sec = ts.tv_sec; |
1288 | a->tv_nsec = ts.tv_nsec; | |
1289 | a->cycle_timer = cycle_time; | |
abfe5a01 SR |
1290 | |
1291 | return ret; | |
1292 | } | |
1293 | ||
6e95dea7 | 1294 | static int ioctl_get_cycle_timer(struct client *client, union ioctl_arg *arg) |
abfe5a01 | 1295 | { |
6e95dea7 | 1296 | struct fw_cdev_get_cycle_timer *a = &arg->get_cycle_timer; |
abfe5a01 SR |
1297 | struct fw_cdev_get_cycle_timer2 ct2; |
1298 | ||
1299 | ct2.clk_id = CLOCK_REALTIME; | |
6e95dea7 | 1300 | ioctl_get_cycle_timer2(client, (union ioctl_arg *)&ct2); |
abfe5a01 | 1301 | |
6e95dea7 SR |
1302 | a->local_time = ct2.tv_sec * USEC_PER_SEC + ct2.tv_nsec / NSEC_PER_USEC; |
1303 | a->cycle_timer = ct2.cycle_timer; | |
4a9bde9b | 1304 | |
a64408b9 SR |
1305 | return 0; |
1306 | } | |
1307 | ||
b1bda4cd JFSR |
1308 | static void iso_resource_work(struct work_struct *work) |
1309 | { | |
1310 | struct iso_resource_event *e; | |
1311 | struct iso_resource *r = | |
1312 | container_of(work, struct iso_resource, work.work); | |
1313 | struct client *client = r->client; | |
1314 | int generation, channel, bandwidth, todo; | |
1315 | bool skip, free, success; | |
1316 | ||
1317 | spin_lock_irq(&client->lock); | |
1318 | generation = client->device->generation; | |
1319 | todo = r->todo; | |
1320 | /* Allow 1000ms grace period for other reallocations. */ | |
1321 | if (todo == ISO_RES_ALLOC && | |
e71084af CL |
1322 | time_before64(get_jiffies_64(), |
1323 | client->device->card->reset_jiffies + HZ)) { | |
9fb551bf | 1324 | schedule_iso_resource(r, DIV_ROUND_UP(HZ, 3)); |
b1bda4cd JFSR |
1325 | skip = true; |
1326 | } else { | |
1327 | /* We could be called twice within the same generation. */ | |
1328 | skip = todo == ISO_RES_REALLOC && | |
1329 | r->generation == generation; | |
1330 | } | |
1ec3c026 SR |
1331 | free = todo == ISO_RES_DEALLOC || |
1332 | todo == ISO_RES_ALLOC_ONCE || | |
1333 | todo == ISO_RES_DEALLOC_ONCE; | |
b1bda4cd JFSR |
1334 | r->generation = generation; |
1335 | spin_unlock_irq(&client->lock); | |
1336 | ||
1337 | if (skip) | |
1338 | goto out; | |
1339 | ||
1340 | bandwidth = r->bandwidth; | |
1341 | ||
1342 | fw_iso_resource_manage(client->device->card, generation, | |
1343 | r->channels, &channel, &bandwidth, | |
1ec3c026 SR |
1344 | todo == ISO_RES_ALLOC || |
1345 | todo == ISO_RES_REALLOC || | |
f30e6d3e | 1346 | todo == ISO_RES_ALLOC_ONCE); |
b1bda4cd JFSR |
1347 | /* |
1348 | * Is this generation outdated already? As long as this resource sticks | |
1349 | * in the idr, it will be scheduled again for a newer generation or at | |
1350 | * shutdown. | |
1351 | */ | |
1352 | if (channel == -EAGAIN && | |
1353 | (todo == ISO_RES_ALLOC || todo == ISO_RES_REALLOC)) | |
1354 | goto out; | |
1355 | ||
1356 | success = channel >= 0 || bandwidth > 0; | |
1357 | ||
1358 | spin_lock_irq(&client->lock); | |
1359 | /* | |
1360 | * Transit from allocation to reallocation, except if the client | |
1361 | * requested deallocation in the meantime. | |
1362 | */ | |
1363 | if (r->todo == ISO_RES_ALLOC) | |
1364 | r->todo = ISO_RES_REALLOC; | |
1365 | /* | |
1366 | * Allocation or reallocation failure? Pull this resource out of the | |
1367 | * idr and prepare for deletion, unless the client is shutting down. | |
1368 | */ | |
1369 | if (r->todo == ISO_RES_REALLOC && !success && | |
1370 | !client->in_shutdown && | |
d3e709e6 | 1371 | idr_remove(&client->resource_idr, r->resource.handle)) { |
b1bda4cd JFSR |
1372 | client_put(client); |
1373 | free = true; | |
1374 | } | |
1375 | spin_unlock_irq(&client->lock); | |
1376 | ||
1377 | if (todo == ISO_RES_ALLOC && channel >= 0) | |
5d9cb7d2 | 1378 | r->channels = 1ULL << channel; |
b1bda4cd JFSR |
1379 | |
1380 | if (todo == ISO_RES_REALLOC && success) | |
1381 | goto out; | |
1382 | ||
1ec3c026 | 1383 | if (todo == ISO_RES_ALLOC || todo == ISO_RES_ALLOC_ONCE) { |
b1bda4cd JFSR |
1384 | e = r->e_alloc; |
1385 | r->e_alloc = NULL; | |
1386 | } else { | |
1387 | e = r->e_dealloc; | |
1388 | r->e_dealloc = NULL; | |
1389 | } | |
e21fcf79 SR |
1390 | e->iso_resource.handle = r->resource.handle; |
1391 | e->iso_resource.channel = channel; | |
1392 | e->iso_resource.bandwidth = bandwidth; | |
b1bda4cd JFSR |
1393 | |
1394 | queue_event(client, &e->event, | |
e21fcf79 | 1395 | &e->iso_resource, sizeof(e->iso_resource), NULL, 0); |
b1bda4cd JFSR |
1396 | |
1397 | if (free) { | |
1398 | cancel_delayed_work(&r->work); | |
1399 | kfree(r->e_alloc); | |
1400 | kfree(r->e_dealloc); | |
1401 | kfree(r); | |
1402 | } | |
1403 | out: | |
1404 | client_put(client); | |
1405 | } | |
1406 | ||
b1bda4cd JFSR |
1407 | static void release_iso_resource(struct client *client, |
1408 | struct client_resource *resource) | |
1409 | { | |
1410 | struct iso_resource *r = | |
1411 | container_of(resource, struct iso_resource, resource); | |
1412 | ||
1413 | spin_lock_irq(&client->lock); | |
1414 | r->todo = ISO_RES_DEALLOC; | |
9fb551bf | 1415 | schedule_iso_resource(r, 0); |
b1bda4cd JFSR |
1416 | spin_unlock_irq(&client->lock); |
1417 | } | |
1418 | ||
1ec3c026 SR |
1419 | static int init_iso_resource(struct client *client, |
1420 | struct fw_cdev_allocate_iso_resource *request, int todo) | |
b1bda4cd | 1421 | { |
b1bda4cd JFSR |
1422 | struct iso_resource_event *e1, *e2; |
1423 | struct iso_resource *r; | |
1424 | int ret; | |
1425 | ||
1426 | if ((request->channels == 0 && request->bandwidth == 0) || | |
bdabfa54 | 1427 | request->bandwidth > BANDWIDTH_AVAILABLE_INITIAL) |
b1bda4cd JFSR |
1428 | return -EINVAL; |
1429 | ||
1430 | r = kmalloc(sizeof(*r), GFP_KERNEL); | |
1431 | e1 = kmalloc(sizeof(*e1), GFP_KERNEL); | |
1432 | e2 = kmalloc(sizeof(*e2), GFP_KERNEL); | |
1433 | if (r == NULL || e1 == NULL || e2 == NULL) { | |
1434 | ret = -ENOMEM; | |
1435 | goto fail; | |
1436 | } | |
1437 | ||
1438 | INIT_DELAYED_WORK(&r->work, iso_resource_work); | |
1439 | r->client = client; | |
1ec3c026 | 1440 | r->todo = todo; |
b1bda4cd JFSR |
1441 | r->generation = -1; |
1442 | r->channels = request->channels; | |
1443 | r->bandwidth = request->bandwidth; | |
1444 | r->e_alloc = e1; | |
1445 | r->e_dealloc = e2; | |
1446 | ||
e21fcf79 SR |
1447 | e1->iso_resource.closure = request->closure; |
1448 | e1->iso_resource.type = FW_CDEV_EVENT_ISO_RESOURCE_ALLOCATED; | |
1449 | e2->iso_resource.closure = request->closure; | |
1450 | e2->iso_resource.type = FW_CDEV_EVENT_ISO_RESOURCE_DEALLOCATED; | |
b1bda4cd | 1451 | |
1ec3c026 SR |
1452 | if (todo == ISO_RES_ALLOC) { |
1453 | r->resource.release = release_iso_resource; | |
1454 | ret = add_client_resource(client, &r->resource, GFP_KERNEL); | |
81610b8f SR |
1455 | if (ret < 0) |
1456 | goto fail; | |
1ec3c026 SR |
1457 | } else { |
1458 | r->resource.release = NULL; | |
1459 | r->resource.handle = -1; | |
9fb551bf | 1460 | schedule_iso_resource(r, 0); |
1ec3c026 | 1461 | } |
b1bda4cd JFSR |
1462 | request->handle = r->resource.handle; |
1463 | ||
1464 | return 0; | |
1465 | fail: | |
1466 | kfree(r); | |
1467 | kfree(e1); | |
1468 | kfree(e2); | |
1469 | ||
1470 | return ret; | |
1471 | } | |
1472 | ||
6e95dea7 SR |
1473 | static int ioctl_allocate_iso_resource(struct client *client, |
1474 | union ioctl_arg *arg) | |
1ec3c026 | 1475 | { |
6e95dea7 SR |
1476 | return init_iso_resource(client, |
1477 | &arg->allocate_iso_resource, ISO_RES_ALLOC); | |
1ec3c026 SR |
1478 | } |
1479 | ||
6e95dea7 SR |
1480 | static int ioctl_deallocate_iso_resource(struct client *client, |
1481 | union ioctl_arg *arg) | |
b1bda4cd | 1482 | { |
6e95dea7 SR |
1483 | return release_client_resource(client, |
1484 | arg->deallocate.handle, release_iso_resource, NULL); | |
b1bda4cd JFSR |
1485 | } |
1486 | ||
6e95dea7 SR |
1487 | static int ioctl_allocate_iso_resource_once(struct client *client, |
1488 | union ioctl_arg *arg) | |
1ec3c026 | 1489 | { |
6e95dea7 SR |
1490 | return init_iso_resource(client, |
1491 | &arg->allocate_iso_resource, ISO_RES_ALLOC_ONCE); | |
1ec3c026 SR |
1492 | } |
1493 | ||
6e95dea7 SR |
1494 | static int ioctl_deallocate_iso_resource_once(struct client *client, |
1495 | union ioctl_arg *arg) | |
1ec3c026 | 1496 | { |
6e95dea7 SR |
1497 | return init_iso_resource(client, |
1498 | &arg->allocate_iso_resource, ISO_RES_DEALLOC_ONCE); | |
1ec3c026 SR |
1499 | } |
1500 | ||
c8a25900 SR |
1501 | /* |
1502 | * Returns a speed code: Maximum speed to or from this device, | |
1503 | * limited by the device's link speed, the local node's link speed, | |
1504 | * and all PHY port speeds between the two links. | |
1505 | */ | |
6e95dea7 | 1506 | static int ioctl_get_speed(struct client *client, union ioctl_arg *arg) |
33580a3e | 1507 | { |
c8a25900 | 1508 | return client->device->max_speed; |
33580a3e SR |
1509 | } |
1510 | ||
6e95dea7 SR |
1511 | static int ioctl_send_broadcast_request(struct client *client, |
1512 | union ioctl_arg *arg) | |
acfe8333 | 1513 | { |
6e95dea7 | 1514 | struct fw_cdev_send_request *a = &arg->send_request; |
acfe8333 | 1515 | |
6e95dea7 | 1516 | switch (a->tcode) { |
acfe8333 JFSR |
1517 | case TCODE_WRITE_QUADLET_REQUEST: |
1518 | case TCODE_WRITE_BLOCK_REQUEST: | |
1519 | break; | |
1520 | default: | |
1521 | return -EINVAL; | |
1522 | } | |
1523 | ||
1566f3dc | 1524 | /* Security policy: Only allow accesses to Units Space. */ |
6e95dea7 | 1525 | if (a->offset < CSR_REGISTER_BASE + CSR_CONFIG_ROM_END) |
1566f3dc SR |
1526 | return -EACCES; |
1527 | ||
6e95dea7 | 1528 | return init_request(client, a, LOCAL_BUS | 0x3f, SCODE_100); |
acfe8333 JFSR |
1529 | } |
1530 | ||
6e95dea7 | 1531 | static int ioctl_send_stream_packet(struct client *client, union ioctl_arg *arg) |
f8c2287c | 1532 | { |
6e95dea7 | 1533 | struct fw_cdev_send_stream_packet *a = &arg->send_stream_packet; |
18e9b10f SR |
1534 | struct fw_cdev_send_request request; |
1535 | int dest; | |
f8c2287c | 1536 | |
6e95dea7 SR |
1537 | if (a->speed > client->device->card->link_speed || |
1538 | a->length > 1024 << a->speed) | |
18e9b10f | 1539 | return -EIO; |
f8c2287c | 1540 | |
6e95dea7 | 1541 | if (a->tag > 3 || a->channel > 63 || a->sy > 15) |
18e9b10f SR |
1542 | return -EINVAL; |
1543 | ||
6e95dea7 | 1544 | dest = fw_stream_packet_destination_id(a->tag, a->channel, a->sy); |
18e9b10f | 1545 | request.tcode = TCODE_STREAM_DATA; |
6e95dea7 SR |
1546 | request.length = a->length; |
1547 | request.closure = a->closure; | |
1548 | request.data = a->data; | |
1549 | request.generation = a->generation; | |
18e9b10f | 1550 | |
6e95dea7 | 1551 | return init_request(client, &request, dest, a->speed); |
f8c2287c JF |
1552 | } |
1553 | ||
850bb6f2 SR |
1554 | static void outbound_phy_packet_callback(struct fw_packet *packet, |
1555 | struct fw_card *card, int status) | |
1556 | { | |
1557 | struct outbound_phy_packet_event *e = | |
1558 | container_of(packet, struct outbound_phy_packet_event, p); | |
1ef14771 TS |
1559 | struct client *e_client = e->client; |
1560 | u32 rcode; | |
850bb6f2 | 1561 | |
810f2aa8 | 1562 | trace_async_phy_outbound_complete((uintptr_t)packet, card->index, status, packet->generation, |
1a4c53cf TS |
1563 | packet->timestamp); |
1564 | ||
850bb6f2 | 1565 | switch (status) { |
1ef14771 TS |
1566 | // expected: |
1567 | case ACK_COMPLETE: | |
1568 | rcode = RCODE_COMPLETE; | |
1569 | break; | |
1570 | // should never happen with PHY packets: | |
1571 | case ACK_PENDING: | |
1572 | rcode = RCODE_COMPLETE; | |
1573 | break; | |
850bb6f2 SR |
1574 | case ACK_BUSY_X: |
1575 | case ACK_BUSY_A: | |
1ef14771 TS |
1576 | case ACK_BUSY_B: |
1577 | rcode = RCODE_BUSY; | |
1578 | break; | |
1579 | case ACK_DATA_ERROR: | |
1580 | rcode = RCODE_DATA_ERROR; | |
1581 | break; | |
1582 | case ACK_TYPE_ERROR: | |
1583 | rcode = RCODE_TYPE_ERROR; | |
1584 | break; | |
1585 | // stale generation; cancelled; on certain controllers: no ack | |
1586 | default: | |
1587 | rcode = status; | |
1588 | break; | |
850bb6f2 SR |
1589 | } |
1590 | ||
fe971f91 TS |
1591 | switch (e->phy_packet.without_tstamp.type) { |
1592 | case FW_CDEV_EVENT_PHY_PACKET_SENT: | |
1593 | { | |
1594 | struct fw_cdev_event_phy_packet *pp = &e->phy_packet.without_tstamp; | |
1595 | ||
1596 | pp->rcode = rcode; | |
1597 | pp->data[0] = packet->timestamp; | |
1598 | queue_event(e->client, &e->event, &e->phy_packet, sizeof(*pp) + pp->length, | |
1599 | NULL, 0); | |
1600 | break; | |
1601 | } | |
1602 | case FW_CDEV_EVENT_PHY_PACKET_SENT2: | |
1603 | { | |
1604 | struct fw_cdev_event_phy_packet2 *pp = &e->phy_packet.with_tstamp; | |
1605 | ||
1606 | pp->rcode = rcode; | |
1607 | pp->tstamp = packet->timestamp; | |
1608 | queue_event(e->client, &e->event, &e->phy_packet, sizeof(*pp) + pp->length, | |
1609 | NULL, 0); | |
1610 | break; | |
1611 | } | |
1612 | default: | |
1613 | WARN_ON(1); | |
1614 | break; | |
1615 | } | |
1ef14771 | 1616 | |
b7c81f80 | 1617 | client_put(e_client); |
850bb6f2 SR |
1618 | } |
1619 | ||
1620 | static int ioctl_send_phy_packet(struct client *client, union ioctl_arg *arg) | |
1621 | { | |
1622 | struct fw_cdev_send_phy_packet *a = &arg->send_phy_packet; | |
1623 | struct fw_card *card = client->device->card; | |
1624 | struct outbound_phy_packet_event *e; | |
1625 | ||
1626 | /* Access policy: Allow this ioctl only on local nodes' device files. */ | |
1627 | if (!client->device->is_local) | |
1628 | return -ENOSYS; | |
1629 | ||
fe971f91 | 1630 | e = kzalloc(sizeof(*e) + sizeof(a->data), GFP_KERNEL); |
850bb6f2 SR |
1631 | if (e == NULL) |
1632 | return -ENOMEM; | |
1633 | ||
1634 | client_get(client); | |
1635 | e->client = client; | |
1636 | e->p.speed = SCODE_100; | |
1637 | e->p.generation = a->generation; | |
5b06db16 CL |
1638 | e->p.header[0] = TCODE_LINK_INTERNAL << 4; |
1639 | e->p.header[1] = a->data[0]; | |
1640 | e->p.header[2] = a->data[1]; | |
1641 | e->p.header_length = 12; | |
850bb6f2 | 1642 | e->p.callback = outbound_phy_packet_callback; |
1ef14771 | 1643 | |
fe971f91 TS |
1644 | if (client->version < FW_CDEV_VERSION_EVENT_ASYNC_TSTAMP) { |
1645 | struct fw_cdev_event_phy_packet *pp = &e->phy_packet.without_tstamp; | |
1646 | ||
1647 | pp->closure = a->closure; | |
1648 | pp->type = FW_CDEV_EVENT_PHY_PACKET_SENT; | |
1649 | if (is_ping_packet(a->data)) | |
1650 | pp->length = 4; | |
1651 | } else { | |
1652 | struct fw_cdev_event_phy_packet2 *pp = &e->phy_packet.with_tstamp; | |
1653 | ||
1654 | pp->closure = a->closure; | |
1655 | pp->type = FW_CDEV_EVENT_PHY_PACKET_SENT2; | |
1656 | // Keep the data field so that application can match the response event to the | |
1657 | // request. | |
1658 | pp->length = sizeof(a->data); | |
1659 | memcpy(pp->data, a->data, sizeof(a->data)); | |
1660 | } | |
850bb6f2 | 1661 | |
3cb44a72 TS |
1662 | trace_async_phy_outbound_initiate((uintptr_t)&e->p, card->index, e->p.generation, |
1663 | e->p.header[1], e->p.header[2]); | |
1a4c53cf | 1664 | |
850bb6f2 SR |
1665 | card->driver->send_request(card, &e->p); |
1666 | ||
1667 | return 0; | |
1668 | } | |
1669 | ||
bf54e146 SR |
1670 | static int ioctl_receive_phy_packets(struct client *client, union ioctl_arg *arg) |
1671 | { | |
1672 | struct fw_cdev_receive_phy_packets *a = &arg->receive_phy_packets; | |
1673 | struct fw_card *card = client->device->card; | |
1674 | ||
1675 | /* Access policy: Allow this ioctl only on local nodes' device files. */ | |
1676 | if (!client->device->is_local) | |
1677 | return -ENOSYS; | |
1678 | ||
1679 | spin_lock_irq(&card->lock); | |
1680 | ||
1681 | list_move_tail(&client->phy_receiver_link, &card->phy_receiver_list); | |
1682 | client->phy_receiver_closure = a->closure; | |
1683 | ||
1684 | spin_unlock_irq(&card->lock); | |
1685 | ||
1686 | return 0; | |
1687 | } | |
1688 | ||
1689 | void fw_cdev_handle_phy_packet(struct fw_card *card, struct fw_packet *p) | |
1690 | { | |
1691 | struct client *client; | |
1692 | struct inbound_phy_packet_event *e; | |
1693 | unsigned long flags; | |
1694 | ||
1695 | spin_lock_irqsave(&card->lock, flags); | |
1696 | ||
1697 | list_for_each_entry(client, &card->phy_receiver_list, phy_receiver_link) { | |
1698 | e = kmalloc(sizeof(*e) + 8, GFP_ATOMIC); | |
cfb0c9d1 | 1699 | if (e == NULL) |
bf54e146 | 1700 | break; |
cfb0c9d1 | 1701 | |
fe971f91 TS |
1702 | if (client->version < FW_CDEV_VERSION_EVENT_ASYNC_TSTAMP) { |
1703 | struct fw_cdev_event_phy_packet *pp = &e->phy_packet.without_tstamp; | |
1704 | ||
1705 | pp->closure = client->phy_receiver_closure; | |
1706 | pp->type = FW_CDEV_EVENT_PHY_PACKET_RECEIVED; | |
1707 | pp->rcode = RCODE_COMPLETE; | |
1708 | pp->length = 8; | |
1709 | pp->data[0] = p->header[1]; | |
1710 | pp->data[1] = p->header[2]; | |
1711 | queue_event(client, &e->event, &e->phy_packet, sizeof(*pp) + 8, NULL, 0); | |
1712 | } else { | |
1713 | struct fw_cdev_event_phy_packet2 *pp = &e->phy_packet.with_tstamp; | |
1714 | ||
1715 | pp = &e->phy_packet.with_tstamp; | |
1716 | pp->closure = client->phy_receiver_closure; | |
1717 | pp->type = FW_CDEV_EVENT_PHY_PACKET_RECEIVED2; | |
1718 | pp->rcode = RCODE_COMPLETE; | |
1719 | pp->length = 8; | |
1720 | pp->tstamp = p->timestamp; | |
1721 | pp->data[0] = p->header[1]; | |
1722 | pp->data[1] = p->header[2]; | |
1723 | queue_event(client, &e->event, &e->phy_packet, sizeof(*pp) + 8, NULL, 0); | |
1724 | } | |
bf54e146 SR |
1725 | } |
1726 | ||
1727 | spin_unlock_irqrestore(&card->lock, flags); | |
1728 | } | |
1729 | ||
6e95dea7 | 1730 | static int (* const ioctl_handlers[])(struct client *, union ioctl_arg *) = { |
b9dc61cf SR |
1731 | [0x00] = ioctl_get_info, |
1732 | [0x01] = ioctl_send_request, | |
1733 | [0x02] = ioctl_allocate, | |
1734 | [0x03] = ioctl_deallocate, | |
1735 | [0x04] = ioctl_send_response, | |
1736 | [0x05] = ioctl_initiate_bus_reset, | |
1737 | [0x06] = ioctl_add_descriptor, | |
1738 | [0x07] = ioctl_remove_descriptor, | |
1739 | [0x08] = ioctl_create_iso_context, | |
1740 | [0x09] = ioctl_queue_iso, | |
1741 | [0x0a] = ioctl_start_iso, | |
1742 | [0x0b] = ioctl_stop_iso, | |
1743 | [0x0c] = ioctl_get_cycle_timer, | |
1744 | [0x0d] = ioctl_allocate_iso_resource, | |
1745 | [0x0e] = ioctl_deallocate_iso_resource, | |
1746 | [0x0f] = ioctl_allocate_iso_resource_once, | |
1747 | [0x10] = ioctl_deallocate_iso_resource_once, | |
1748 | [0x11] = ioctl_get_speed, | |
1749 | [0x12] = ioctl_send_broadcast_request, | |
1750 | [0x13] = ioctl_send_stream_packet, | |
1751 | [0x14] = ioctl_get_cycle_timer2, | |
850bb6f2 | 1752 | [0x15] = ioctl_send_phy_packet, |
bf54e146 | 1753 | [0x16] = ioctl_receive_phy_packets, |
872e330e | 1754 | [0x17] = ioctl_set_iso_channels, |
d1bbd209 | 1755 | [0x18] = ioctl_flush_iso, |
4f259223 KH |
1756 | }; |
1757 | ||
53dca511 SR |
1758 | static int dispatch_ioctl(struct client *client, |
1759 | unsigned int cmd, void __user *arg) | |
19a15b93 | 1760 | { |
6e95dea7 | 1761 | union ioctl_arg buffer; |
2dbd7d7e | 1762 | int ret; |
4f259223 | 1763 | |
64582298 SR |
1764 | if (fw_device_is_shutdown(client->device)) |
1765 | return -ENODEV; | |
1766 | ||
4f259223 | 1767 | if (_IOC_TYPE(cmd) != '#' || |
9cac00b8 SR |
1768 | _IOC_NR(cmd) >= ARRAY_SIZE(ioctl_handlers) || |
1769 | _IOC_SIZE(cmd) > sizeof(buffer)) | |
d873d794 | 1770 | return -ENOTTY; |
4f259223 | 1771 | |
eaca2d8e | 1772 | memset(&buffer, 0, sizeof(buffer)); |
9cac00b8 SR |
1773 | |
1774 | if (_IOC_DIR(cmd) & _IOC_WRITE) | |
1775 | if (copy_from_user(&buffer, arg, _IOC_SIZE(cmd))) | |
4f259223 | 1776 | return -EFAULT; |
4f259223 | 1777 | |
6e95dea7 | 1778 | ret = ioctl_handlers[_IOC_NR(cmd)](client, &buffer); |
2dbd7d7e SR |
1779 | if (ret < 0) |
1780 | return ret; | |
4f259223 | 1781 | |
9cac00b8 SR |
1782 | if (_IOC_DIR(cmd) & _IOC_READ) |
1783 | if (copy_to_user(arg, &buffer, _IOC_SIZE(cmd))) | |
4f259223 | 1784 | return -EFAULT; |
4f259223 | 1785 | |
2dbd7d7e | 1786 | return ret; |
19a15b93 KH |
1787 | } |
1788 | ||
53dca511 SR |
1789 | static long fw_device_op_ioctl(struct file *file, |
1790 | unsigned int cmd, unsigned long arg) | |
19a15b93 | 1791 | { |
64582298 | 1792 | return dispatch_ioctl(file->private_data, cmd, (void __user *)arg); |
19a15b93 KH |
1793 | } |
1794 | ||
19a15b93 KH |
1795 | static int fw_device_op_mmap(struct file *file, struct vm_area_struct *vma) |
1796 | { | |
1797 | struct client *client = file->private_data; | |
9aad8125 | 1798 | unsigned long size; |
2dbd7d7e | 1799 | int page_count, ret; |
9aad8125 | 1800 | |
551f4cb9 JF |
1801 | if (fw_device_is_shutdown(client->device)) |
1802 | return -ENODEV; | |
1803 | ||
9aad8125 KH |
1804 | /* FIXME: We could support multiple buffers, but we don't. */ |
1805 | if (client->buffer.pages != NULL) | |
1806 | return -EBUSY; | |
1807 | ||
1808 | if (!(vma->vm_flags & VM_SHARED)) | |
1809 | return -EINVAL; | |
19a15b93 | 1810 | |
9aad8125 | 1811 | if (vma->vm_start & ~PAGE_MASK) |
19a15b93 KH |
1812 | return -EINVAL; |
1813 | ||
1814 | client->vm_start = vma->vm_start; | |
9aad8125 KH |
1815 | size = vma->vm_end - vma->vm_start; |
1816 | page_count = size >> PAGE_SHIFT; | |
1817 | if (size & ~PAGE_MASK) | |
1818 | return -EINVAL; | |
1819 | ||
0b6c4857 | 1820 | ret = fw_iso_buffer_alloc(&client->buffer, page_count); |
2dbd7d7e SR |
1821 | if (ret < 0) |
1822 | return ret; | |
19a15b93 | 1823 | |
0b6c4857 SR |
1824 | spin_lock_irq(&client->lock); |
1825 | if (client->iso_context) { | |
1826 | ret = fw_iso_buffer_map_dma(&client->buffer, | |
1827 | client->device->card, | |
1828 | iso_dma_direction(client->iso_context)); | |
1829 | client->buffer_is_mapped = (ret == 0); | |
1830 | } | |
1831 | spin_unlock_irq(&client->lock); | |
2dbd7d7e | 1832 | if (ret < 0) |
0b6c4857 | 1833 | goto fail; |
9aad8125 | 1834 | |
7807759e SR |
1835 | ret = vm_map_pages_zero(vma, client->buffer.pages, |
1836 | client->buffer.page_count); | |
0b6c4857 SR |
1837 | if (ret < 0) |
1838 | goto fail; | |
1839 | ||
1840 | return 0; | |
1841 | fail: | |
1842 | fw_iso_buffer_destroy(&client->buffer, client->device->card); | |
2dbd7d7e | 1843 | return ret; |
19a15b93 KH |
1844 | } |
1845 | ||
5a5e62da CL |
1846 | static int is_outbound_transaction_resource(int id, void *p, void *data) |
1847 | { | |
1848 | struct client_resource *resource = p; | |
1849 | ||
1850 | return resource->release == release_transaction; | |
1851 | } | |
1852 | ||
1853 | static int has_outbound_transactions(struct client *client) | |
1854 | { | |
1855 | int ret; | |
1856 | ||
1857 | spin_lock_irq(&client->lock); | |
1858 | ret = idr_for_each(&client->resource_idr, | |
1859 | is_outbound_transaction_resource, NULL); | |
1860 | spin_unlock_irq(&client->lock); | |
1861 | ||
1862 | return ret; | |
1863 | } | |
1864 | ||
45ee3199 JF |
1865 | static int shutdown_resource(int id, void *p, void *data) |
1866 | { | |
e21fcf79 | 1867 | struct client_resource *resource = p; |
45ee3199 JF |
1868 | struct client *client = data; |
1869 | ||
e21fcf79 | 1870 | resource->release(client, resource); |
fb443036 | 1871 | client_put(client); |
45ee3199 JF |
1872 | |
1873 | return 0; | |
1874 | } | |
1875 | ||
19a15b93 KH |
1876 | static int fw_device_op_release(struct inode *inode, struct file *file) |
1877 | { | |
1878 | struct client *client = file->private_data; | |
e21fcf79 | 1879 | struct event *event, *next_event; |
19a15b93 | 1880 | |
bf54e146 SR |
1881 | spin_lock_irq(&client->device->card->lock); |
1882 | list_del(&client->phy_receiver_link); | |
1883 | spin_unlock_irq(&client->device->card->lock); | |
1884 | ||
97811e34 SR |
1885 | mutex_lock(&client->device->client_list_mutex); |
1886 | list_del(&client->link); | |
1887 | mutex_unlock(&client->device->client_list_mutex); | |
1888 | ||
19a15b93 KH |
1889 | if (client->iso_context) |
1890 | fw_iso_context_destroy(client->iso_context); | |
1891 | ||
36a755cf SR |
1892 | if (client->buffer.pages) |
1893 | fw_iso_buffer_destroy(&client->buffer, client->device->card); | |
1894 | ||
45ee3199 | 1895 | /* Freeze client->resource_idr and client->event_list */ |
3ba94986 | 1896 | spin_lock_irq(&client->lock); |
45ee3199 | 1897 | client->in_shutdown = true; |
3ba94986 | 1898 | spin_unlock_irq(&client->lock); |
66dea3e5 | 1899 | |
5a5e62da CL |
1900 | wait_event(client->tx_flush_wait, !has_outbound_transactions(client)); |
1901 | ||
45ee3199 | 1902 | idr_for_each(&client->resource_idr, shutdown_resource, client); |
45ee3199 | 1903 | idr_destroy(&client->resource_idr); |
28cf6a04 | 1904 | |
e21fcf79 SR |
1905 | list_for_each_entry_safe(event, next_event, &client->event_list, link) |
1906 | kfree(event); | |
19a15b93 | 1907 | |
fb443036 | 1908 | client_put(client); |
19a15b93 KH |
1909 | |
1910 | return 0; | |
1911 | } | |
1912 | ||
afc9a42b | 1913 | static __poll_t fw_device_op_poll(struct file *file, poll_table * pt) |
19a15b93 KH |
1914 | { |
1915 | struct client *client = file->private_data; | |
afc9a42b | 1916 | __poll_t mask = 0; |
19a15b93 KH |
1917 | |
1918 | poll_wait(file, &client->wait, pt); | |
1919 | ||
2603bf21 | 1920 | if (fw_device_is_shutdown(client->device)) |
a9a08845 | 1921 | mask |= EPOLLHUP | EPOLLERR; |
19a15b93 | 1922 | if (!list_empty(&client->event_list)) |
a9a08845 | 1923 | mask |= EPOLLIN | EPOLLRDNORM; |
2603bf21 KH |
1924 | |
1925 | return mask; | |
19a15b93 KH |
1926 | } |
1927 | ||
21ebcd12 | 1928 | const struct file_operations fw_device_ops = { |
19a15b93 | 1929 | .owner = THIS_MODULE, |
3ac26b2e | 1930 | .llseek = no_llseek, |
19a15b93 KH |
1931 | .open = fw_device_op_open, |
1932 | .read = fw_device_op_read, | |
1933 | .unlocked_ioctl = fw_device_op_ioctl, | |
19a15b93 | 1934 | .mmap = fw_device_op_mmap, |
3ac26b2e SR |
1935 | .release = fw_device_op_release, |
1936 | .poll = fw_device_op_poll, | |
407e9ef7 | 1937 | .compat_ioctl = compat_ptr_ioctl, |
19a15b93 | 1938 | }; |