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" |
19a15b93 | 38 | |
604f4516 SR |
39 | /* |
40 | * ABI version history is documented in linux/firewire-cdev.h. | |
41 | */ | |
18d62711 | 42 | #define FW_CDEV_KERNEL_VERSION 5 |
8e2b2b46 SR |
43 | #define FW_CDEV_VERSION_EVENT_REQUEST2 4 |
44 | #define FW_CDEV_VERSION_ALLOCATE_REGION_END 4 | |
0699a73a | 45 | #define FW_CDEV_VERSION_AUTO_FLUSH_ISO_OVERFLOW 5 |
604f4516 | 46 | |
19a15b93 | 47 | struct client { |
344bbc4d | 48 | u32 version; |
19a15b93 | 49 | struct fw_device *device; |
45ee3199 | 50 | |
19a15b93 | 51 | spinlock_t lock; |
45ee3199 JF |
52 | bool in_shutdown; |
53 | struct idr resource_idr; | |
19a15b93 | 54 | struct list_head event_list; |
19a15b93 | 55 | wait_queue_head_t wait; |
5a5e62da | 56 | wait_queue_head_t tx_flush_wait; |
da8ecffa | 57 | u64 bus_reset_closure; |
9aad8125 | 58 | |
19a15b93 | 59 | struct fw_iso_context *iso_context; |
abaa5743 | 60 | u64 iso_closure; |
9aad8125 KH |
61 | struct fw_iso_buffer buffer; |
62 | unsigned long vm_start; | |
0b6c4857 | 63 | bool buffer_is_mapped; |
97bd9efa | 64 | |
bf54e146 SR |
65 | struct list_head phy_receiver_link; |
66 | u64 phy_receiver_closure; | |
67 | ||
97bd9efa | 68 | struct list_head link; |
fb443036 | 69 | struct kref kref; |
19a15b93 KH |
70 | }; |
71 | ||
fb443036 SR |
72 | static inline void client_get(struct client *client) |
73 | { | |
74 | kref_get(&client->kref); | |
75 | } | |
76 | ||
77 | static void client_release(struct kref *kref) | |
78 | { | |
79 | struct client *client = container_of(kref, struct client, kref); | |
80 | ||
81 | fw_device_put(client->device); | |
82 | kfree(client); | |
83 | } | |
84 | ||
85 | static void client_put(struct client *client) | |
86 | { | |
87 | kref_put(&client->kref, client_release); | |
88 | } | |
89 | ||
97c18b7f SR |
90 | struct client_resource; |
91 | typedef void (*client_resource_release_fn_t)(struct client *, | |
92 | struct client_resource *); | |
93 | struct client_resource { | |
94 | client_resource_release_fn_t release; | |
95 | int handle; | |
96 | }; | |
97 | ||
98 | struct address_handler_resource { | |
99 | struct client_resource resource; | |
100 | struct fw_address_handler handler; | |
101 | __u64 closure; | |
102 | struct client *client; | |
103 | }; | |
104 | ||
105 | struct outbound_transaction_resource { | |
106 | struct client_resource resource; | |
107 | struct fw_transaction transaction; | |
108 | }; | |
109 | ||
110 | struct inbound_transaction_resource { | |
111 | struct client_resource resource; | |
08bd34c9 | 112 | struct fw_card *card; |
97c18b7f SR |
113 | struct fw_request *request; |
114 | void *data; | |
115 | size_t length; | |
116 | }; | |
117 | ||
118 | struct descriptor_resource { | |
119 | struct client_resource resource; | |
120 | struct fw_descriptor descriptor; | |
c38e7e21 | 121 | u32 data[]; |
97c18b7f SR |
122 | }; |
123 | ||
b1bda4cd JFSR |
124 | struct iso_resource { |
125 | struct client_resource resource; | |
126 | struct client *client; | |
127 | /* Schedule work and access todo only with client->lock held. */ | |
128 | struct delayed_work work; | |
1ec3c026 SR |
129 | enum {ISO_RES_ALLOC, ISO_RES_REALLOC, ISO_RES_DEALLOC, |
130 | ISO_RES_ALLOC_ONCE, ISO_RES_DEALLOC_ONCE,} todo; | |
b1bda4cd JFSR |
131 | int generation; |
132 | u64 channels; | |
133 | s32 bandwidth; | |
134 | struct iso_resource_event *e_alloc, *e_dealloc; | |
135 | }; | |
136 | ||
b1bda4cd JFSR |
137 | static void release_iso_resource(struct client *, struct client_resource *); |
138 | ||
9fb551bf SR |
139 | static void schedule_iso_resource(struct iso_resource *r, unsigned long delay) |
140 | { | |
141 | client_get(r->client); | |
105e53f8 | 142 | if (!queue_delayed_work(fw_workqueue, &r->work, delay)) |
9fb551bf SR |
143 | client_put(r->client); |
144 | } | |
145 | ||
146 | static void schedule_if_iso_resource(struct client_resource *resource) | |
147 | { | |
148 | if (resource->release == release_iso_resource) | |
149 | schedule_iso_resource(container_of(resource, | |
150 | struct iso_resource, resource), 0); | |
151 | } | |
152 | ||
97c18b7f SR |
153 | /* |
154 | * dequeue_event() just kfree()'s the event, so the event has to be | |
155 | * the first field in a struct XYZ_event. | |
156 | */ | |
157 | struct event { | |
158 | struct { void *data; size_t size; } v[2]; | |
159 | struct list_head link; | |
160 | }; | |
161 | ||
162 | struct bus_reset_event { | |
163 | struct event event; | |
164 | struct fw_cdev_event_bus_reset reset; | |
165 | }; | |
166 | ||
167 | struct outbound_transaction_event { | |
168 | struct event event; | |
169 | struct client *client; | |
170 | struct outbound_transaction_resource r; | |
171 | struct fw_cdev_event_response response; | |
172 | }; | |
173 | ||
174 | struct inbound_transaction_event { | |
175 | struct event event; | |
e205597d SR |
176 | union { |
177 | struct fw_cdev_event_request request; | |
178 | struct fw_cdev_event_request2 request2; | |
179 | } req; | |
97c18b7f SR |
180 | }; |
181 | ||
182 | struct iso_interrupt_event { | |
183 | struct event event; | |
184 | struct fw_cdev_event_iso_interrupt interrupt; | |
185 | }; | |
186 | ||
872e330e SR |
187 | struct iso_interrupt_mc_event { |
188 | struct event event; | |
189 | struct fw_cdev_event_iso_interrupt_mc interrupt; | |
190 | }; | |
191 | ||
b1bda4cd JFSR |
192 | struct iso_resource_event { |
193 | struct event event; | |
e21fcf79 | 194 | struct fw_cdev_event_iso_resource iso_resource; |
b1bda4cd JFSR |
195 | }; |
196 | ||
850bb6f2 SR |
197 | struct outbound_phy_packet_event { |
198 | struct event event; | |
199 | struct client *client; | |
200 | struct fw_packet p; | |
201 | struct fw_cdev_event_phy_packet phy_packet; | |
202 | }; | |
203 | ||
bf54e146 SR |
204 | struct inbound_phy_packet_event { |
205 | struct event event; | |
206 | struct fw_cdev_event_phy_packet phy_packet; | |
207 | }; | |
208 | ||
9c1176b6 SR |
209 | #ifdef CONFIG_COMPAT |
210 | static void __user *u64_to_uptr(u64 value) | |
211 | { | |
a25045ff | 212 | if (in_compat_syscall()) |
9c1176b6 SR |
213 | return compat_ptr(value); |
214 | else | |
215 | return (void __user *)(unsigned long)value; | |
216 | } | |
217 | ||
218 | static u64 uptr_to_u64(void __user *ptr) | |
219 | { | |
a25045ff | 220 | if (in_compat_syscall()) |
9c1176b6 SR |
221 | return ptr_to_compat(ptr); |
222 | else | |
223 | return (u64)(unsigned long)ptr; | |
224 | } | |
225 | #else | |
226 | static inline void __user *u64_to_uptr(u64 value) | |
19a15b93 KH |
227 | { |
228 | return (void __user *)(unsigned long)value; | |
229 | } | |
230 | ||
9c1176b6 | 231 | static inline u64 uptr_to_u64(void __user *ptr) |
19a15b93 | 232 | { |
9c1176b6 | 233 | return (u64)(unsigned long)ptr; |
19a15b93 | 234 | } |
9c1176b6 | 235 | #endif /* CONFIG_COMPAT */ |
19a15b93 KH |
236 | |
237 | static int fw_device_op_open(struct inode *inode, struct file *file) | |
238 | { | |
239 | struct fw_device *device; | |
240 | struct client *client; | |
241 | ||
96b19062 | 242 | device = fw_device_get_by_devt(inode->i_rdev); |
a3aca3da KH |
243 | if (device == NULL) |
244 | return -ENODEV; | |
19a15b93 | 245 | |
551f4cb9 JF |
246 | if (fw_device_is_shutdown(device)) { |
247 | fw_device_put(device); | |
248 | return -ENODEV; | |
249 | } | |
250 | ||
2d826cc5 | 251 | client = kzalloc(sizeof(*client), GFP_KERNEL); |
96b19062 SR |
252 | if (client == NULL) { |
253 | fw_device_put(device); | |
19a15b93 | 254 | return -ENOMEM; |
96b19062 | 255 | } |
19a15b93 | 256 | |
96b19062 | 257 | client->device = device; |
19a15b93 | 258 | spin_lock_init(&client->lock); |
45ee3199 JF |
259 | idr_init(&client->resource_idr); |
260 | INIT_LIST_HEAD(&client->event_list); | |
19a15b93 | 261 | init_waitqueue_head(&client->wait); |
5a5e62da | 262 | init_waitqueue_head(&client->tx_flush_wait); |
bf54e146 | 263 | INIT_LIST_HEAD(&client->phy_receiver_link); |
93b37905 | 264 | INIT_LIST_HEAD(&client->link); |
fb443036 | 265 | kref_init(&client->kref); |
19a15b93 KH |
266 | |
267 | file->private_data = client; | |
268 | ||
3ac26b2e | 269 | return nonseekable_open(inode, file); |
19a15b93 KH |
270 | } |
271 | ||
272 | static void queue_event(struct client *client, struct event *event, | |
273 | void *data0, size_t size0, void *data1, size_t size1) | |
274 | { | |
275 | unsigned long flags; | |
276 | ||
277 | event->v[0].data = data0; | |
278 | event->v[0].size = size0; | |
279 | event->v[1].data = data1; | |
280 | event->v[1].size = size1; | |
281 | ||
282 | spin_lock_irqsave(&client->lock, flags); | |
45ee3199 JF |
283 | if (client->in_shutdown) |
284 | kfree(event); | |
285 | else | |
286 | list_add_tail(&event->link, &client->event_list); | |
19a15b93 | 287 | spin_unlock_irqrestore(&client->lock, flags); |
83431cba JF |
288 | |
289 | wake_up_interruptible(&client->wait); | |
19a15b93 KH |
290 | } |
291 | ||
53dca511 SR |
292 | static int dequeue_event(struct client *client, |
293 | char __user *buffer, size_t count) | |
19a15b93 | 294 | { |
19a15b93 KH |
295 | struct event *event; |
296 | size_t size, total; | |
2dbd7d7e | 297 | int i, ret; |
19a15b93 | 298 | |
2dbd7d7e SR |
299 | ret = wait_event_interruptible(client->wait, |
300 | !list_empty(&client->event_list) || | |
301 | fw_device_is_shutdown(client->device)); | |
302 | if (ret < 0) | |
303 | return ret; | |
19a15b93 | 304 | |
2603bf21 KH |
305 | if (list_empty(&client->event_list) && |
306 | fw_device_is_shutdown(client->device)) | |
307 | return -ENODEV; | |
19a15b93 | 308 | |
3ba94986 | 309 | spin_lock_irq(&client->lock); |
a459b8ab | 310 | event = list_first_entry(&client->event_list, struct event, link); |
19a15b93 | 311 | list_del(&event->link); |
3ba94986 | 312 | spin_unlock_irq(&client->lock); |
19a15b93 | 313 | |
19a15b93 KH |
314 | total = 0; |
315 | for (i = 0; i < ARRAY_SIZE(event->v) && total < count; i++) { | |
316 | size = min(event->v[i].size, count - total); | |
2603bf21 | 317 | if (copy_to_user(buffer + total, event->v[i].data, size)) { |
2dbd7d7e | 318 | ret = -EFAULT; |
19a15b93 | 319 | goto out; |
2603bf21 | 320 | } |
19a15b93 KH |
321 | total += size; |
322 | } | |
2dbd7d7e | 323 | ret = total; |
19a15b93 KH |
324 | |
325 | out: | |
326 | kfree(event); | |
327 | ||
2dbd7d7e | 328 | return ret; |
19a15b93 KH |
329 | } |
330 | ||
53dca511 SR |
331 | static ssize_t fw_device_op_read(struct file *file, char __user *buffer, |
332 | size_t count, loff_t *offset) | |
19a15b93 KH |
333 | { |
334 | struct client *client = file->private_data; | |
335 | ||
336 | return dequeue_event(client, buffer, count); | |
337 | } | |
338 | ||
53dca511 SR |
339 | static void fill_bus_reset_event(struct fw_cdev_event_bus_reset *event, |
340 | struct client *client) | |
344bbc4d | 341 | { |
da8ecffa | 342 | struct fw_card *card = client->device->card; |
cf417e54 | 343 | |
3ba94986 | 344 | spin_lock_irq(&card->lock); |
344bbc4d | 345 | |
da8ecffa | 346 | event->closure = client->bus_reset_closure; |
344bbc4d | 347 | event->type = FW_CDEV_EVENT_BUS_RESET; |
cf5a56ac | 348 | event->generation = client->device->generation; |
da8ecffa | 349 | event->node_id = client->device->node_id; |
344bbc4d | 350 | event->local_node_id = card->local_node->node_id; |
250b2b6d | 351 | event->bm_node_id = card->bm_node_id; |
344bbc4d KH |
352 | event->irm_node_id = card->irm_node->node_id; |
353 | event->root_node_id = card->root_node->node_id; | |
cf417e54 | 354 | |
3ba94986 | 355 | spin_unlock_irq(&card->lock); |
344bbc4d KH |
356 | } |
357 | ||
53dca511 SR |
358 | static void for_each_client(struct fw_device *device, |
359 | void (*callback)(struct client *client)) | |
2603bf21 | 360 | { |
2603bf21 | 361 | struct client *c; |
2603bf21 | 362 | |
d67cfb96 | 363 | mutex_lock(&device->client_list_mutex); |
2603bf21 KH |
364 | list_for_each_entry(c, &device->client_list, link) |
365 | callback(c); | |
d67cfb96 | 366 | mutex_unlock(&device->client_list_mutex); |
2603bf21 KH |
367 | } |
368 | ||
b1bda4cd JFSR |
369 | static int schedule_reallocations(int id, void *p, void *data) |
370 | { | |
9fb551bf | 371 | schedule_if_iso_resource(p); |
b1bda4cd | 372 | |
b1bda4cd JFSR |
373 | return 0; |
374 | } | |
375 | ||
53dca511 | 376 | static void queue_bus_reset_event(struct client *client) |
97bd9efa | 377 | { |
97c18b7f | 378 | struct bus_reset_event *e; |
97bd9efa | 379 | |
97c18b7f | 380 | e = kzalloc(sizeof(*e), GFP_KERNEL); |
cfb0c9d1 | 381 | if (e == NULL) |
97bd9efa | 382 | return; |
97bd9efa | 383 | |
97c18b7f | 384 | fill_bus_reset_event(&e->reset, client); |
97bd9efa | 385 | |
97c18b7f SR |
386 | queue_event(client, &e->event, |
387 | &e->reset, sizeof(e->reset), NULL, 0); | |
b1bda4cd JFSR |
388 | |
389 | spin_lock_irq(&client->lock); | |
390 | idr_for_each(&client->resource_idr, schedule_reallocations, client); | |
391 | spin_unlock_irq(&client->lock); | |
97bd9efa KH |
392 | } |
393 | ||
394 | void fw_device_cdev_update(struct fw_device *device) | |
395 | { | |
2603bf21 KH |
396 | for_each_client(device, queue_bus_reset_event); |
397 | } | |
97bd9efa | 398 | |
2603bf21 KH |
399 | static void wake_up_client(struct client *client) |
400 | { | |
401 | wake_up_interruptible(&client->wait); | |
402 | } | |
97bd9efa | 403 | |
2603bf21 KH |
404 | void fw_device_cdev_remove(struct fw_device *device) |
405 | { | |
406 | for_each_client(device, wake_up_client); | |
97bd9efa KH |
407 | } |
408 | ||
6e95dea7 SR |
409 | union ioctl_arg { |
410 | struct fw_cdev_get_info get_info; | |
411 | struct fw_cdev_send_request send_request; | |
412 | struct fw_cdev_allocate allocate; | |
413 | struct fw_cdev_deallocate deallocate; | |
414 | struct fw_cdev_send_response send_response; | |
415 | struct fw_cdev_initiate_bus_reset initiate_bus_reset; | |
416 | struct fw_cdev_add_descriptor add_descriptor; | |
417 | struct fw_cdev_remove_descriptor remove_descriptor; | |
418 | struct fw_cdev_create_iso_context create_iso_context; | |
419 | struct fw_cdev_queue_iso queue_iso; | |
420 | struct fw_cdev_start_iso start_iso; | |
421 | struct fw_cdev_stop_iso stop_iso; | |
422 | struct fw_cdev_get_cycle_timer get_cycle_timer; | |
423 | struct fw_cdev_allocate_iso_resource allocate_iso_resource; | |
424 | struct fw_cdev_send_stream_packet send_stream_packet; | |
425 | struct fw_cdev_get_cycle_timer2 get_cycle_timer2; | |
850bb6f2 | 426 | struct fw_cdev_send_phy_packet send_phy_packet; |
bf54e146 | 427 | struct fw_cdev_receive_phy_packets receive_phy_packets; |
872e330e | 428 | struct fw_cdev_set_iso_channels set_iso_channels; |
d1bbd209 | 429 | struct fw_cdev_flush_iso flush_iso; |
6e95dea7 SR |
430 | }; |
431 | ||
432 | static int ioctl_get_info(struct client *client, union ioctl_arg *arg) | |
19a15b93 | 433 | { |
6e95dea7 | 434 | struct fw_cdev_get_info *a = &arg->get_info; |
344bbc4d | 435 | struct fw_cdev_event_bus_reset bus_reset; |
c9755e14 | 436 | unsigned long ret = 0; |
344bbc4d | 437 | |
6e95dea7 | 438 | client->version = a->version; |
604f4516 | 439 | a->version = FW_CDEV_KERNEL_VERSION; |
6e95dea7 | 440 | a->card = client->device->card->index; |
344bbc4d | 441 | |
c9755e14 SR |
442 | down_read(&fw_device_rwsem); |
443 | ||
6e95dea7 SR |
444 | if (a->rom != 0) { |
445 | size_t want = a->rom_length; | |
d84702a5 | 446 | size_t have = client->device->config_rom_length * 4; |
344bbc4d | 447 | |
6e95dea7 SR |
448 | ret = copy_to_user(u64_to_uptr(a->rom), |
449 | client->device->config_rom, min(want, have)); | |
344bbc4d | 450 | } |
6e95dea7 | 451 | a->rom_length = client->device->config_rom_length * 4; |
344bbc4d | 452 | |
c9755e14 SR |
453 | up_read(&fw_device_rwsem); |
454 | ||
455 | if (ret != 0) | |
456 | return -EFAULT; | |
457 | ||
93b37905 SR |
458 | mutex_lock(&client->device->client_list_mutex); |
459 | ||
6e95dea7 SR |
460 | client->bus_reset_closure = a->bus_reset_closure; |
461 | if (a->bus_reset != 0) { | |
da8ecffa | 462 | fill_bus_reset_event(&bus_reset, client); |
790198f7 SR |
463 | /* unaligned size of bus_reset is 36 bytes */ |
464 | ret = copy_to_user(u64_to_uptr(a->bus_reset), &bus_reset, 36); | |
344bbc4d | 465 | } |
93b37905 SR |
466 | if (ret == 0 && list_empty(&client->link)) |
467 | list_add_tail(&client->link, &client->device->client_list); | |
19a15b93 | 468 | |
93b37905 SR |
469 | mutex_unlock(&client->device->client_list_mutex); |
470 | ||
471 | return ret ? -EFAULT : 0; | |
19a15b93 KH |
472 | } |
473 | ||
53dca511 SR |
474 | static int add_client_resource(struct client *client, |
475 | struct client_resource *resource, gfp_t gfp_mask) | |
3964a449 | 476 | { |
d0164adc | 477 | bool preload = gfpflags_allow_blocking(gfp_mask); |
3964a449 | 478 | unsigned long flags; |
45ee3199 JF |
479 | int ret; |
480 | ||
37b61890 TH |
481 | if (preload) |
482 | idr_preload(gfp_mask); | |
3964a449 | 483 | spin_lock_irqsave(&client->lock, flags); |
37b61890 | 484 | |
45ee3199 JF |
485 | if (client->in_shutdown) |
486 | ret = -ECANCELED; | |
487 | else | |
37b61890 TH |
488 | ret = idr_alloc(&client->resource_idr, resource, 0, 0, |
489 | GFP_NOWAIT); | |
b1bda4cd | 490 | if (ret >= 0) { |
37b61890 | 491 | resource->handle = ret; |
fb443036 | 492 | client_get(client); |
9fb551bf | 493 | schedule_if_iso_resource(resource); |
b1bda4cd | 494 | } |
45ee3199 | 495 | |
37b61890 TH |
496 | spin_unlock_irqrestore(&client->lock, flags); |
497 | if (preload) | |
498 | idr_preload_end(); | |
45ee3199 JF |
499 | |
500 | return ret < 0 ? ret : 0; | |
3964a449 KH |
501 | } |
502 | ||
53dca511 SR |
503 | static int release_client_resource(struct client *client, u32 handle, |
504 | client_resource_release_fn_t release, | |
e21fcf79 | 505 | struct client_resource **return_resource) |
3964a449 | 506 | { |
e21fcf79 | 507 | struct client_resource *resource; |
3964a449 | 508 | |
3ba94986 | 509 | spin_lock_irq(&client->lock); |
45ee3199 | 510 | if (client->in_shutdown) |
e21fcf79 | 511 | resource = NULL; |
45ee3199 | 512 | else |
e21fcf79 SR |
513 | resource = idr_find(&client->resource_idr, handle); |
514 | if (resource && resource->release == release) | |
45ee3199 | 515 | idr_remove(&client->resource_idr, handle); |
3ba94986 | 516 | spin_unlock_irq(&client->lock); |
3964a449 | 517 | |
e21fcf79 | 518 | if (!(resource && resource->release == release)) |
3964a449 KH |
519 | return -EINVAL; |
520 | ||
e21fcf79 SR |
521 | if (return_resource) |
522 | *return_resource = resource; | |
3964a449 | 523 | else |
e21fcf79 | 524 | resource->release(client, resource); |
3964a449 | 525 | |
fb443036 SR |
526 | client_put(client); |
527 | ||
3964a449 KH |
528 | return 0; |
529 | } | |
530 | ||
53dca511 SR |
531 | static void release_transaction(struct client *client, |
532 | struct client_resource *resource) | |
3964a449 | 533 | { |
3964a449 KH |
534 | } |
535 | ||
53dca511 SR |
536 | static void complete_transaction(struct fw_card *card, int rcode, |
537 | void *payload, size_t length, void *data) | |
19a15b93 | 538 | { |
97c18b7f SR |
539 | struct outbound_transaction_event *e = data; |
540 | struct fw_cdev_event_response *rsp = &e->response; | |
541 | struct client *client = e->client; | |
28cf6a04 | 542 | unsigned long flags; |
19a15b93 | 543 | |
97c18b7f SR |
544 | if (length < rsp->length) |
545 | rsp->length = length; | |
19a15b93 | 546 | if (rcode == RCODE_COMPLETE) |
97c18b7f | 547 | memcpy(rsp->data, payload, rsp->length); |
19a15b93 | 548 | |
28cf6a04 | 549 | spin_lock_irqsave(&client->lock, flags); |
5a5e62da CL |
550 | idr_remove(&client->resource_idr, e->r.resource.handle); |
551 | if (client->in_shutdown) | |
552 | wake_up(&client->tx_flush_wait); | |
28cf6a04 KH |
553 | spin_unlock_irqrestore(&client->lock, flags); |
554 | ||
97c18b7f SR |
555 | rsp->type = FW_CDEV_EVENT_RESPONSE; |
556 | rsp->rcode = rcode; | |
8401d92b DM |
557 | |
558 | /* | |
97c18b7f | 559 | * In the case that sizeof(*rsp) doesn't align with the position of the |
8401d92b DM |
560 | * data, and the read is short, preserve an extra copy of the data |
561 | * to stay compatible with a pre-2.6.27 bug. Since the bug is harmless | |
562 | * for short reads and some apps depended on it, this is both safe | |
563 | * and prudent for compatibility. | |
564 | */ | |
97c18b7f SR |
565 | if (rsp->length <= sizeof(*rsp) - offsetof(typeof(*rsp), data)) |
566 | queue_event(client, &e->event, rsp, sizeof(*rsp), | |
567 | rsp->data, rsp->length); | |
8401d92b | 568 | else |
97c18b7f | 569 | queue_event(client, &e->event, rsp, sizeof(*rsp) + rsp->length, |
8401d92b | 570 | NULL, 0); |
fb443036 | 571 | |
5a5e62da CL |
572 | /* Drop the idr's reference */ |
573 | client_put(client); | |
19a15b93 KH |
574 | } |
575 | ||
acfe8333 JFSR |
576 | static int init_request(struct client *client, |
577 | struct fw_cdev_send_request *request, | |
578 | int destination_id, int speed) | |
19a15b93 | 579 | { |
97c18b7f | 580 | struct outbound_transaction_event *e; |
1f3125af | 581 | int ret; |
19a15b93 | 582 | |
18e9b10f SR |
583 | if (request->tcode != TCODE_STREAM_DATA && |
584 | (request->length > 4096 || request->length > 512 << speed)) | |
5d3fd692 | 585 | return -EIO; |
19a15b93 | 586 | |
a8e93f3d CL |
587 | if (request->tcode == TCODE_WRITE_QUADLET_REQUEST && |
588 | request->length < 4) | |
589 | return -EINVAL; | |
590 | ||
97c18b7f SR |
591 | e = kmalloc(sizeof(*e) + request->length, GFP_KERNEL); |
592 | if (e == NULL) | |
19a15b93 KH |
593 | return -ENOMEM; |
594 | ||
97c18b7f SR |
595 | e->client = client; |
596 | e->response.length = request->length; | |
597 | e->response.closure = request->closure; | |
19a15b93 | 598 | |
4f259223 | 599 | if (request->data && |
97c18b7f | 600 | copy_from_user(e->response.data, |
4f259223 | 601 | u64_to_uptr(request->data), request->length)) { |
1f3125af | 602 | ret = -EFAULT; |
45ee3199 | 603 | goto failed; |
1f3125af SR |
604 | } |
605 | ||
97c18b7f SR |
606 | e->r.resource.release = release_transaction; |
607 | ret = add_client_resource(client, &e->r.resource, GFP_KERNEL); | |
45ee3199 JF |
608 | if (ret < 0) |
609 | goto failed; | |
28cf6a04 | 610 | |
acfe8333 | 611 | fw_send_request(client->device->card, &e->r.transaction, |
664d8010 SR |
612 | request->tcode, destination_id, request->generation, |
613 | speed, request->offset, e->response.data, | |
614 | request->length, complete_transaction, e); | |
615 | return 0; | |
19a15b93 | 616 | |
45ee3199 | 617 | failed: |
97c18b7f | 618 | kfree(e); |
1f3125af SR |
619 | |
620 | return ret; | |
19a15b93 KH |
621 | } |
622 | ||
6e95dea7 | 623 | static int ioctl_send_request(struct client *client, union ioctl_arg *arg) |
acfe8333 | 624 | { |
6e95dea7 | 625 | switch (arg->send_request.tcode) { |
acfe8333 JFSR |
626 | case TCODE_WRITE_QUADLET_REQUEST: |
627 | case TCODE_WRITE_BLOCK_REQUEST: | |
628 | case TCODE_READ_QUADLET_REQUEST: | |
629 | case TCODE_READ_BLOCK_REQUEST: | |
630 | case TCODE_LOCK_MASK_SWAP: | |
631 | case TCODE_LOCK_COMPARE_SWAP: | |
632 | case TCODE_LOCK_FETCH_ADD: | |
633 | case TCODE_LOCK_LITTLE_ADD: | |
634 | case TCODE_LOCK_BOUNDED_ADD: | |
635 | case TCODE_LOCK_WRAP_ADD: | |
636 | case TCODE_LOCK_VENDOR_DEPENDENT: | |
637 | break; | |
638 | default: | |
639 | return -EINVAL; | |
640 | } | |
641 | ||
6e95dea7 | 642 | return init_request(client, &arg->send_request, client->device->node_id, |
acfe8333 JFSR |
643 | client->device->max_speed); |
644 | } | |
645 | ||
281e2032 SR |
646 | static inline bool is_fcp_request(struct fw_request *request) |
647 | { | |
648 | return request == NULL; | |
649 | } | |
650 | ||
53dca511 SR |
651 | static void release_request(struct client *client, |
652 | struct client_resource *resource) | |
3964a449 | 653 | { |
97c18b7f SR |
654 | struct inbound_transaction_resource *r = container_of(resource, |
655 | struct inbound_transaction_resource, resource); | |
3964a449 | 656 | |
281e2032 SR |
657 | if (is_fcp_request(r->request)) |
658 | kfree(r->data); | |
659 | else | |
08bd34c9 | 660 | fw_send_response(r->card, r->request, RCODE_CONFLICT_ERROR); |
0244f573 SR |
661 | |
662 | fw_card_put(r->card); | |
97c18b7f | 663 | kfree(r); |
3964a449 KH |
664 | } |
665 | ||
97c18b7f | 666 | static void handle_request(struct fw_card *card, struct fw_request *request, |
53dca511 | 667 | int tcode, int destination, int source, |
33e553fe | 668 | int generation, unsigned long long offset, |
53dca511 | 669 | void *payload, size_t length, void *callback_data) |
19a15b93 | 670 | { |
97c18b7f SR |
671 | struct address_handler_resource *handler = callback_data; |
672 | struct inbound_transaction_resource *r; | |
673 | struct inbound_transaction_event *e; | |
e205597d | 674 | size_t event_size0; |
281e2032 | 675 | void *fcp_frame = NULL; |
45ee3199 | 676 | int ret; |
19a15b93 | 677 | |
0244f573 SR |
678 | /* card may be different from handler->client->device->card */ |
679 | fw_card_get(card); | |
680 | ||
97c18b7f | 681 | r = kmalloc(sizeof(*r), GFP_ATOMIC); |
2d826cc5 | 682 | e = kmalloc(sizeof(*e), GFP_ATOMIC); |
cfb0c9d1 | 683 | if (r == NULL || e == NULL) |
45ee3199 | 684 | goto failed; |
cfb0c9d1 | 685 | |
08bd34c9 | 686 | r->card = card; |
97c18b7f SR |
687 | r->request = request; |
688 | r->data = payload; | |
689 | r->length = length; | |
19a15b93 | 690 | |
281e2032 SR |
691 | if (is_fcp_request(request)) { |
692 | /* | |
693 | * FIXME: Let core-transaction.c manage a | |
694 | * single reference-counted copy? | |
695 | */ | |
696 | fcp_frame = kmemdup(payload, length, GFP_ATOMIC); | |
697 | if (fcp_frame == NULL) | |
698 | goto failed; | |
699 | ||
700 | r->data = fcp_frame; | |
701 | } | |
702 | ||
97c18b7f SR |
703 | r->resource.release = release_request; |
704 | ret = add_client_resource(handler->client, &r->resource, GFP_ATOMIC); | |
45ee3199 JF |
705 | if (ret < 0) |
706 | goto failed; | |
19a15b93 | 707 | |
e205597d SR |
708 | if (handler->client->version < FW_CDEV_VERSION_EVENT_REQUEST2) { |
709 | struct fw_cdev_event_request *req = &e->req.request; | |
710 | ||
711 | if (tcode & 0x10) | |
712 | tcode = TCODE_LOCK_REQUEST; | |
713 | ||
714 | req->type = FW_CDEV_EVENT_REQUEST; | |
715 | req->tcode = tcode; | |
716 | req->offset = offset; | |
717 | req->length = length; | |
718 | req->handle = r->resource.handle; | |
719 | req->closure = handler->closure; | |
720 | event_size0 = sizeof(*req); | |
721 | } else { | |
722 | struct fw_cdev_event_request2 *req = &e->req.request2; | |
723 | ||
724 | req->type = FW_CDEV_EVENT_REQUEST2; | |
725 | req->tcode = tcode; | |
726 | req->offset = offset; | |
727 | req->source_node_id = source; | |
728 | req->destination_node_id = destination; | |
729 | req->card = card->index; | |
730 | req->generation = generation; | |
731 | req->length = length; | |
732 | req->handle = r->resource.handle; | |
733 | req->closure = handler->closure; | |
734 | event_size0 = sizeof(*req); | |
735 | } | |
19a15b93 | 736 | |
97c18b7f | 737 | queue_event(handler->client, &e->event, |
e205597d | 738 | &e->req, event_size0, r->data, length); |
45ee3199 JF |
739 | return; |
740 | ||
741 | failed: | |
97c18b7f | 742 | kfree(r); |
45ee3199 | 743 | kfree(e); |
281e2032 SR |
744 | kfree(fcp_frame); |
745 | ||
746 | if (!is_fcp_request(request)) | |
db5d247a | 747 | fw_send_response(card, request, RCODE_CONFLICT_ERROR); |
0244f573 SR |
748 | |
749 | fw_card_put(card); | |
19a15b93 KH |
750 | } |
751 | ||
53dca511 SR |
752 | static void release_address_handler(struct client *client, |
753 | struct client_resource *resource) | |
3964a449 | 754 | { |
97c18b7f SR |
755 | struct address_handler_resource *r = |
756 | container_of(resource, struct address_handler_resource, resource); | |
3964a449 | 757 | |
97c18b7f SR |
758 | fw_core_remove_address_handler(&r->handler); |
759 | kfree(r); | |
3964a449 KH |
760 | } |
761 | ||
6e95dea7 | 762 | static int ioctl_allocate(struct client *client, union ioctl_arg *arg) |
19a15b93 | 763 | { |
6e95dea7 | 764 | struct fw_cdev_allocate *a = &arg->allocate; |
97c18b7f | 765 | struct address_handler_resource *r; |
19a15b93 | 766 | struct fw_address_region region; |
45ee3199 | 767 | int ret; |
19a15b93 | 768 | |
97c18b7f SR |
769 | r = kmalloc(sizeof(*r), GFP_KERNEL); |
770 | if (r == NULL) | |
19a15b93 KH |
771 | return -ENOMEM; |
772 | ||
6e95dea7 | 773 | region.start = a->offset; |
8e2b2b46 SR |
774 | if (client->version < FW_CDEV_VERSION_ALLOCATE_REGION_END) |
775 | region.end = a->offset + a->length; | |
776 | else | |
777 | region.end = a->region_end; | |
778 | ||
6e95dea7 | 779 | r->handler.length = a->length; |
97c18b7f | 780 | r->handler.address_callback = handle_request; |
6e95dea7 SR |
781 | r->handler.callback_data = r; |
782 | r->closure = a->closure; | |
783 | r->client = client; | |
19a15b93 | 784 | |
97c18b7f | 785 | ret = fw_core_add_address_handler(&r->handler, ®ion); |
3e0b5f0d | 786 | if (ret < 0) { |
97c18b7f | 787 | kfree(r); |
3e0b5f0d | 788 | return ret; |
19a15b93 | 789 | } |
8e2b2b46 | 790 | a->offset = r->handler.offset; |
19a15b93 | 791 | |
97c18b7f SR |
792 | r->resource.release = release_address_handler; |
793 | ret = add_client_resource(client, &r->resource, GFP_KERNEL); | |
45ee3199 | 794 | if (ret < 0) { |
97c18b7f | 795 | release_address_handler(client, &r->resource); |
45ee3199 JF |
796 | return ret; |
797 | } | |
6e95dea7 | 798 | a->handle = r->resource.handle; |
19a15b93 KH |
799 | |
800 | return 0; | |
801 | } | |
802 | ||
6e95dea7 | 803 | static int ioctl_deallocate(struct client *client, union ioctl_arg *arg) |
9472316b | 804 | { |
6e95dea7 | 805 | return release_client_resource(client, arg->deallocate.handle, |
45ee3199 | 806 | release_address_handler, NULL); |
9472316b KH |
807 | } |
808 | ||
6e95dea7 | 809 | static int ioctl_send_response(struct client *client, union ioctl_arg *arg) |
19a15b93 | 810 | { |
6e95dea7 | 811 | struct fw_cdev_send_response *a = &arg->send_response; |
3964a449 | 812 | struct client_resource *resource; |
97c18b7f | 813 | struct inbound_transaction_resource *r; |
7e44c0b5 | 814 | int ret = 0; |
19a15b93 | 815 | |
6e95dea7 | 816 | if (release_client_resource(client, a->handle, |
45ee3199 | 817 | release_request, &resource) < 0) |
19a15b93 | 818 | return -EINVAL; |
45ee3199 | 819 | |
97c18b7f SR |
820 | r = container_of(resource, struct inbound_transaction_resource, |
821 | resource); | |
281e2032 SR |
822 | if (is_fcp_request(r->request)) |
823 | goto out; | |
824 | ||
a10c0ce7 CL |
825 | if (a->length != fw_get_response_length(r->request)) { |
826 | ret = -EINVAL; | |
827 | kfree(r->request); | |
828 | goto out; | |
829 | } | |
830 | if (copy_from_user(r->data, u64_to_uptr(a->data), a->length)) { | |
281e2032 SR |
831 | ret = -EFAULT; |
832 | kfree(r->request); | |
833 | goto out; | |
7e44c0b5 | 834 | } |
08bd34c9 | 835 | fw_send_response(r->card, r->request, a->rcode); |
7e44c0b5 | 836 | out: |
0244f573 | 837 | fw_card_put(r->card); |
19a15b93 KH |
838 | kfree(r); |
839 | ||
7e44c0b5 | 840 | return ret; |
19a15b93 KH |
841 | } |
842 | ||
6e95dea7 | 843 | static int ioctl_initiate_bus_reset(struct client *client, union ioctl_arg *arg) |
5371842b | 844 | { |
02d37bed | 845 | fw_schedule_bus_reset(client->device->card, true, |
6e95dea7 | 846 | arg->initiate_bus_reset.type == FW_CDEV_SHORT_RESET); |
02d37bed | 847 | return 0; |
5371842b KH |
848 | } |
849 | ||
3964a449 KH |
850 | static void release_descriptor(struct client *client, |
851 | struct client_resource *resource) | |
852 | { | |
97c18b7f SR |
853 | struct descriptor_resource *r = |
854 | container_of(resource, struct descriptor_resource, resource); | |
3964a449 | 855 | |
97c18b7f SR |
856 | fw_core_remove_descriptor(&r->descriptor); |
857 | kfree(r); | |
3964a449 KH |
858 | } |
859 | ||
6e95dea7 | 860 | static int ioctl_add_descriptor(struct client *client, union ioctl_arg *arg) |
66dea3e5 | 861 | { |
6e95dea7 | 862 | struct fw_cdev_add_descriptor *a = &arg->add_descriptor; |
97c18b7f | 863 | struct descriptor_resource *r; |
45ee3199 | 864 | int ret; |
66dea3e5 | 865 | |
de487da8 | 866 | /* Access policy: Allow this ioctl only on local nodes' device files. */ |
92368890 | 867 | if (!client->device->is_local) |
de487da8 SR |
868 | return -ENOSYS; |
869 | ||
6e95dea7 | 870 | if (a->length > 256) |
66dea3e5 KH |
871 | return -EINVAL; |
872 | ||
6e95dea7 | 873 | r = kmalloc(sizeof(*r) + a->length * 4, GFP_KERNEL); |
97c18b7f | 874 | if (r == NULL) |
66dea3e5 KH |
875 | return -ENOMEM; |
876 | ||
6e95dea7 | 877 | if (copy_from_user(r->data, u64_to_uptr(a->data), a->length * 4)) { |
45ee3199 JF |
878 | ret = -EFAULT; |
879 | goto failed; | |
66dea3e5 KH |
880 | } |
881 | ||
6e95dea7 SR |
882 | r->descriptor.length = a->length; |
883 | r->descriptor.immediate = a->immediate; | |
884 | r->descriptor.key = a->key; | |
97c18b7f | 885 | r->descriptor.data = r->data; |
66dea3e5 | 886 | |
97c18b7f | 887 | ret = fw_core_add_descriptor(&r->descriptor); |
45ee3199 JF |
888 | if (ret < 0) |
889 | goto failed; | |
66dea3e5 | 890 | |
97c18b7f SR |
891 | r->resource.release = release_descriptor; |
892 | ret = add_client_resource(client, &r->resource, GFP_KERNEL); | |
45ee3199 | 893 | if (ret < 0) { |
97c18b7f | 894 | fw_core_remove_descriptor(&r->descriptor); |
45ee3199 JF |
895 | goto failed; |
896 | } | |
6e95dea7 | 897 | a->handle = r->resource.handle; |
66dea3e5 KH |
898 | |
899 | return 0; | |
45ee3199 | 900 | failed: |
97c18b7f | 901 | kfree(r); |
45ee3199 JF |
902 | |
903 | return ret; | |
66dea3e5 KH |
904 | } |
905 | ||
6e95dea7 | 906 | static int ioctl_remove_descriptor(struct client *client, union ioctl_arg *arg) |
66dea3e5 | 907 | { |
6e95dea7 | 908 | return release_client_resource(client, arg->remove_descriptor.handle, |
45ee3199 | 909 | release_descriptor, NULL); |
66dea3e5 KH |
910 | } |
911 | ||
53dca511 SR |
912 | static void iso_callback(struct fw_iso_context *context, u32 cycle, |
913 | size_t header_length, void *header, void *data) | |
19a15b93 KH |
914 | { |
915 | struct client *client = data; | |
97c18b7f | 916 | struct iso_interrupt_event *e; |
19a15b93 | 917 | |
56d04cb1 | 918 | e = kmalloc(sizeof(*e) + header_length, GFP_ATOMIC); |
cfb0c9d1 | 919 | if (e == NULL) |
19a15b93 | 920 | return; |
cfb0c9d1 | 921 | |
97c18b7f SR |
922 | e->interrupt.type = FW_CDEV_EVENT_ISO_INTERRUPT; |
923 | e->interrupt.closure = client->iso_closure; | |
924 | e->interrupt.cycle = cycle; | |
925 | e->interrupt.header_length = header_length; | |
926 | memcpy(e->interrupt.header, header, header_length); | |
927 | queue_event(client, &e->event, &e->interrupt, | |
928 | sizeof(e->interrupt) + header_length, NULL, 0); | |
19a15b93 KH |
929 | } |
930 | ||
872e330e SR |
931 | static void iso_mc_callback(struct fw_iso_context *context, |
932 | dma_addr_t completed, void *data) | |
933 | { | |
934 | struct client *client = data; | |
935 | struct iso_interrupt_mc_event *e; | |
936 | ||
937 | e = kmalloc(sizeof(*e), GFP_ATOMIC); | |
cfb0c9d1 | 938 | if (e == NULL) |
872e330e | 939 | return; |
cfb0c9d1 | 940 | |
872e330e SR |
941 | e->interrupt.type = FW_CDEV_EVENT_ISO_INTERRUPT_MULTICHANNEL; |
942 | e->interrupt.closure = client->iso_closure; | |
943 | e->interrupt.completed = fw_iso_buffer_lookup(&client->buffer, | |
944 | completed); | |
945 | queue_event(client, &e->event, &e->interrupt, | |
946 | sizeof(e->interrupt), NULL, 0); | |
947 | } | |
948 | ||
0b6c4857 SR |
949 | static enum dma_data_direction iso_dma_direction(struct fw_iso_context *context) |
950 | { | |
951 | if (context->type == FW_ISO_CONTEXT_TRANSMIT) | |
952 | return DMA_TO_DEVICE; | |
953 | else | |
954 | return DMA_FROM_DEVICE; | |
955 | } | |
956 | ||
ebe4560e OC |
957 | static struct fw_iso_context *fw_iso_mc_context_create(struct fw_card *card, |
958 | fw_iso_mc_callback_t callback, | |
959 | void *callback_data) | |
960 | { | |
961 | struct fw_iso_context *ctx; | |
962 | ||
963 | ctx = fw_iso_context_create(card, FW_ISO_CONTEXT_RECEIVE_MULTICHANNEL, | |
964 | 0, 0, 0, NULL, callback_data); | |
965 | if (!IS_ERR(ctx)) | |
966 | ctx->callback.mc = callback; | |
967 | ||
968 | return ctx; | |
969 | } | |
970 | ||
6e95dea7 | 971 | static int ioctl_create_iso_context(struct client *client, union ioctl_arg *arg) |
19a15b93 | 972 | { |
6e95dea7 | 973 | struct fw_cdev_create_iso_context *a = &arg->create_iso_context; |
24315c5e | 974 | struct fw_iso_context *context; |
ebe4560e | 975 | union fw_iso_callback cb; |
0b6c4857 | 976 | int ret; |
19a15b93 | 977 | |
eb5b35a5 | 978 | BUILD_BUG_ON(FW_CDEV_ISO_CONTEXT_TRANSMIT != FW_ISO_CONTEXT_TRANSMIT || |
872e330e SR |
979 | FW_CDEV_ISO_CONTEXT_RECEIVE != FW_ISO_CONTEXT_RECEIVE || |
980 | FW_CDEV_ISO_CONTEXT_RECEIVE_MULTICHANNEL != | |
981 | FW_ISO_CONTEXT_RECEIVE_MULTICHANNEL); | |
21efb3cf | 982 | |
6e95dea7 | 983 | switch (a->type) { |
872e330e SR |
984 | case FW_ISO_CONTEXT_TRANSMIT: |
985 | if (a->speed > SCODE_3200 || a->channel > 63) | |
c70dc788 | 986 | return -EINVAL; |
872e330e | 987 | |
ebe4560e | 988 | cb.sc = iso_callback; |
c70dc788 KH |
989 | break; |
990 | ||
872e330e SR |
991 | case FW_ISO_CONTEXT_RECEIVE: |
992 | if (a->header_size < 4 || (a->header_size & 3) || | |
993 | a->channel > 63) | |
c70dc788 | 994 | return -EINVAL; |
872e330e | 995 | |
ebe4560e | 996 | cb.sc = iso_callback; |
872e330e SR |
997 | break; |
998 | ||
999 | case FW_ISO_CONTEXT_RECEIVE_MULTICHANNEL: | |
ebe4560e | 1000 | cb.mc = iso_mc_callback; |
c70dc788 KH |
1001 | break; |
1002 | ||
1003 | default: | |
21efb3cf | 1004 | return -EINVAL; |
c70dc788 KH |
1005 | } |
1006 | ||
ebe4560e OC |
1007 | if (a->type == FW_ISO_CONTEXT_RECEIVE_MULTICHANNEL) |
1008 | context = fw_iso_mc_context_create(client->device->card, cb.mc, | |
1009 | client); | |
1010 | else | |
1011 | context = fw_iso_context_create(client->device->card, a->type, | |
1012 | a->channel, a->speed, | |
1013 | a->header_size, cb.sc, client); | |
24315c5e KH |
1014 | if (IS_ERR(context)) |
1015 | return PTR_ERR(context); | |
0699a73a CL |
1016 | if (client->version < FW_CDEV_VERSION_AUTO_FLUSH_ISO_OVERFLOW) |
1017 | context->drop_overflow_headers = true; | |
24315c5e | 1018 | |
bdfe273e CL |
1019 | /* We only support one context at this time. */ |
1020 | spin_lock_irq(&client->lock); | |
1021 | if (client->iso_context != NULL) { | |
1022 | spin_unlock_irq(&client->lock); | |
1023 | fw_iso_context_destroy(context); | |
0b6c4857 | 1024 | |
bdfe273e CL |
1025 | return -EBUSY; |
1026 | } | |
0b6c4857 SR |
1027 | if (!client->buffer_is_mapped) { |
1028 | ret = fw_iso_buffer_map_dma(&client->buffer, | |
1029 | client->device->card, | |
1030 | iso_dma_direction(context)); | |
1031 | if (ret < 0) { | |
1032 | spin_unlock_irq(&client->lock); | |
1033 | fw_iso_context_destroy(context); | |
1034 | ||
1035 | return ret; | |
1036 | } | |
1037 | client->buffer_is_mapped = true; | |
1038 | } | |
6e95dea7 | 1039 | client->iso_closure = a->closure; |
24315c5e | 1040 | client->iso_context = context; |
bdfe273e | 1041 | spin_unlock_irq(&client->lock); |
19a15b93 | 1042 | |
6e95dea7 | 1043 | a->handle = 0; |
abaa5743 | 1044 | |
19a15b93 KH |
1045 | return 0; |
1046 | } | |
1047 | ||
872e330e SR |
1048 | static int ioctl_set_iso_channels(struct client *client, union ioctl_arg *arg) |
1049 | { | |
1050 | struct fw_cdev_set_iso_channels *a = &arg->set_iso_channels; | |
1051 | struct fw_iso_context *ctx = client->iso_context; | |
1052 | ||
1053 | if (ctx == NULL || a->handle != 0) | |
1054 | return -EINVAL; | |
1055 | ||
1056 | return fw_iso_context_set_channels(ctx, &a->channels); | |
1057 | } | |
1058 | ||
1ca31ae7 KH |
1059 | /* Macros for decoding the iso packet control header. */ |
1060 | #define GET_PAYLOAD_LENGTH(v) ((v) & 0xffff) | |
1061 | #define GET_INTERRUPT(v) (((v) >> 16) & 0x01) | |
1062 | #define GET_SKIP(v) (((v) >> 17) & 0x01) | |
7a100344 SR |
1063 | #define GET_TAG(v) (((v) >> 18) & 0x03) |
1064 | #define GET_SY(v) (((v) >> 20) & 0x0f) | |
1ca31ae7 KH |
1065 | #define GET_HEADER_LENGTH(v) (((v) >> 24) & 0xff) |
1066 | ||
6e95dea7 | 1067 | static int ioctl_queue_iso(struct client *client, union ioctl_arg *arg) |
19a15b93 | 1068 | { |
6e95dea7 | 1069 | struct fw_cdev_queue_iso *a = &arg->queue_iso; |
19a15b93 | 1070 | struct fw_cdev_iso_packet __user *p, *end, *next; |
9b32d5f3 | 1071 | struct fw_iso_context *ctx = client->iso_context; |
872e330e | 1072 | unsigned long payload, buffer_end, transmit_header_bytes = 0; |
1ca31ae7 | 1073 | u32 control; |
19a15b93 KH |
1074 | int count; |
1075 | struct { | |
1076 | struct fw_iso_packet packet; | |
1077 | u8 header[256]; | |
1078 | } u; | |
1079 | ||
6e95dea7 | 1080 | if (ctx == NULL || a->handle != 0) |
19a15b93 | 1081 | return -EINVAL; |
19a15b93 | 1082 | |
c781c06d KH |
1083 | /* |
1084 | * If the user passes a non-NULL data pointer, has mmap()'ed | |
19a15b93 KH |
1085 | * the iso buffer, and the pointer points inside the buffer, |
1086 | * we setup the payload pointers accordingly. Otherwise we | |
9aad8125 | 1087 | * set them both to 0, which will still let packets with |
19a15b93 KH |
1088 | * payload_length == 0 through. In other words, if no packets |
1089 | * use the indirect payload, the iso buffer need not be mapped | |
6e95dea7 | 1090 | * and the a->data pointer is ignored. |
c781c06d | 1091 | */ |
6e95dea7 | 1092 | payload = (unsigned long)a->data - client->vm_start; |
ef370ee7 | 1093 | buffer_end = client->buffer.page_count << PAGE_SHIFT; |
6e95dea7 | 1094 | if (a->data == 0 || client->buffer.pages == NULL || |
ef370ee7 | 1095 | payload >= buffer_end) { |
9aad8125 | 1096 | payload = 0; |
ef370ee7 | 1097 | buffer_end = 0; |
19a15b93 KH |
1098 | } |
1099 | ||
872e330e SR |
1100 | if (ctx->type == FW_ISO_CONTEXT_RECEIVE_MULTICHANNEL && payload & 3) |
1101 | return -EINVAL; | |
1ccc9147 | 1102 | |
872e330e | 1103 | p = (struct fw_cdev_iso_packet __user *)u64_to_uptr(a->packets); |
19a15b93 | 1104 | |
6e95dea7 | 1105 | end = (void __user *)p + a->size; |
19a15b93 KH |
1106 | count = 0; |
1107 | while (p < end) { | |
1ca31ae7 | 1108 | if (get_user(control, &p->control)) |
19a15b93 | 1109 | return -EFAULT; |
1ca31ae7 KH |
1110 | u.packet.payload_length = GET_PAYLOAD_LENGTH(control); |
1111 | u.packet.interrupt = GET_INTERRUPT(control); | |
1112 | u.packet.skip = GET_SKIP(control); | |
1113 | u.packet.tag = GET_TAG(control); | |
1114 | u.packet.sy = GET_SY(control); | |
1115 | u.packet.header_length = GET_HEADER_LENGTH(control); | |
295e3feb | 1116 | |
872e330e SR |
1117 | switch (ctx->type) { |
1118 | case FW_ISO_CONTEXT_TRANSMIT: | |
1119 | if (u.packet.header_length & 3) | |
385ab5bc | 1120 | return -EINVAL; |
ae2a9766 | 1121 | transmit_header_bytes = u.packet.header_length; |
872e330e SR |
1122 | break; |
1123 | ||
1124 | case FW_ISO_CONTEXT_RECEIVE: | |
69e61d0c SR |
1125 | if (u.packet.header_length == 0 || |
1126 | u.packet.header_length % ctx->header_size != 0) | |
385ab5bc | 1127 | return -EINVAL; |
872e330e SR |
1128 | break; |
1129 | ||
1130 | case FW_ISO_CONTEXT_RECEIVE_MULTICHANNEL: | |
1131 | if (u.packet.payload_length == 0 || | |
1132 | u.packet.payload_length & 3) | |
295e3feb | 1133 | return -EINVAL; |
872e330e | 1134 | break; |
295e3feb KH |
1135 | } |
1136 | ||
19a15b93 | 1137 | next = (struct fw_cdev_iso_packet __user *) |
ae2a9766 | 1138 | &p->header[transmit_header_bytes / 4]; |
19a15b93 KH |
1139 | if (next > end) |
1140 | return -EINVAL; | |
daa98831 | 1141 | if (copy_from_user |
ae2a9766 | 1142 | (u.packet.header, p->header, transmit_header_bytes)) |
19a15b93 | 1143 | return -EFAULT; |
98b6cbe8 | 1144 | if (u.packet.skip && ctx->type == FW_ISO_CONTEXT_TRANSMIT && |
19a15b93 KH |
1145 | u.packet.header_length + u.packet.payload_length > 0) |
1146 | return -EINVAL; | |
ef370ee7 | 1147 | if (payload + u.packet.payload_length > buffer_end) |
19a15b93 KH |
1148 | return -EINVAL; |
1149 | ||
9b32d5f3 KH |
1150 | if (fw_iso_context_queue(ctx, &u.packet, |
1151 | &client->buffer, payload)) | |
19a15b93 KH |
1152 | break; |
1153 | ||
1154 | p = next; | |
1155 | payload += u.packet.payload_length; | |
1156 | count++; | |
1157 | } | |
13882a82 | 1158 | fw_iso_context_queue_flush(ctx); |
19a15b93 | 1159 | |
6e95dea7 SR |
1160 | a->size -= uptr_to_u64(p) - a->packets; |
1161 | a->packets = uptr_to_u64(p); | |
1162 | a->data = client->vm_start + payload; | |
19a15b93 KH |
1163 | |
1164 | return count; | |
1165 | } | |
1166 | ||
6e95dea7 | 1167 | static int ioctl_start_iso(struct client *client, union ioctl_arg *arg) |
19a15b93 | 1168 | { |
6e95dea7 | 1169 | struct fw_cdev_start_iso *a = &arg->start_iso; |
19a15b93 | 1170 | |
eb5b35a5 SR |
1171 | BUILD_BUG_ON( |
1172 | FW_CDEV_ISO_CONTEXT_MATCH_TAG0 != FW_ISO_CONTEXT_MATCH_TAG0 || | |
1173 | FW_CDEV_ISO_CONTEXT_MATCH_TAG1 != FW_ISO_CONTEXT_MATCH_TAG1 || | |
1174 | FW_CDEV_ISO_CONTEXT_MATCH_TAG2 != FW_ISO_CONTEXT_MATCH_TAG2 || | |
1175 | FW_CDEV_ISO_CONTEXT_MATCH_TAG3 != FW_ISO_CONTEXT_MATCH_TAG3 || | |
1176 | FW_CDEV_ISO_CONTEXT_MATCH_ALL_TAGS != FW_ISO_CONTEXT_MATCH_ALL_TAGS); | |
1177 | ||
6e95dea7 | 1178 | if (client->iso_context == NULL || a->handle != 0) |
abaa5743 | 1179 | return -EINVAL; |
fae60312 | 1180 | |
6e95dea7 SR |
1181 | if (client->iso_context->type == FW_ISO_CONTEXT_RECEIVE && |
1182 | (a->tags == 0 || a->tags > 15 || a->sync > 15)) | |
1183 | return -EINVAL; | |
eb0306ea | 1184 | |
6e95dea7 SR |
1185 | return fw_iso_context_start(client->iso_context, |
1186 | a->cycle, a->sync, a->tags); | |
19a15b93 KH |
1187 | } |
1188 | ||
6e95dea7 | 1189 | static int ioctl_stop_iso(struct client *client, union ioctl_arg *arg) |
b8295668 | 1190 | { |
6e95dea7 | 1191 | struct fw_cdev_stop_iso *a = &arg->stop_iso; |
abaa5743 | 1192 | |
6e95dea7 | 1193 | if (client->iso_context == NULL || a->handle != 0) |
abaa5743 KH |
1194 | return -EINVAL; |
1195 | ||
b8295668 KH |
1196 | return fw_iso_context_stop(client->iso_context); |
1197 | } | |
1198 | ||
d1bbd209 CL |
1199 | static int ioctl_flush_iso(struct client *client, union ioctl_arg *arg) |
1200 | { | |
1201 | struct fw_cdev_flush_iso *a = &arg->flush_iso; | |
1202 | ||
1203 | if (client->iso_context == NULL || a->handle != 0) | |
1204 | return -EINVAL; | |
1205 | ||
1206 | return fw_iso_context_flush_completions(client->iso_context); | |
1207 | } | |
1208 | ||
6e95dea7 | 1209 | static int ioctl_get_cycle_timer2(struct client *client, union ioctl_arg *arg) |
a64408b9 | 1210 | { |
6e95dea7 | 1211 | struct fw_cdev_get_cycle_timer2 *a = &arg->get_cycle_timer2; |
a64408b9 | 1212 | struct fw_card *card = client->device->card; |
2c1bb29a | 1213 | struct timespec64 ts = {0, 0}; |
dda8ad0a | 1214 | u32 cycle_time = 0; |
abfe5a01 | 1215 | int ret = 0; |
a64408b9 | 1216 | |
4a9bde9b | 1217 | local_irq_disable(); |
a64408b9 | 1218 | |
baa914cd TS |
1219 | ret = fw_card_read_cycle_time(card, &cycle_time); |
1220 | if (ret < 0) | |
1221 | goto end; | |
abfe5a01 | 1222 | |
6e95dea7 | 1223 | switch (a->clk_id) { |
2c1bb29a AB |
1224 | case CLOCK_REALTIME: ktime_get_real_ts64(&ts); break; |
1225 | case CLOCK_MONOTONIC: ktime_get_ts64(&ts); break; | |
1226 | case CLOCK_MONOTONIC_RAW: ktime_get_raw_ts64(&ts); break; | |
abfe5a01 SR |
1227 | default: |
1228 | ret = -EINVAL; | |
1229 | } | |
baa914cd | 1230 | end: |
4a9bde9b | 1231 | local_irq_enable(); |
a64408b9 | 1232 | |
6e95dea7 SR |
1233 | a->tv_sec = ts.tv_sec; |
1234 | a->tv_nsec = ts.tv_nsec; | |
1235 | a->cycle_timer = cycle_time; | |
abfe5a01 SR |
1236 | |
1237 | return ret; | |
1238 | } | |
1239 | ||
6e95dea7 | 1240 | static int ioctl_get_cycle_timer(struct client *client, union ioctl_arg *arg) |
abfe5a01 | 1241 | { |
6e95dea7 | 1242 | struct fw_cdev_get_cycle_timer *a = &arg->get_cycle_timer; |
abfe5a01 SR |
1243 | struct fw_cdev_get_cycle_timer2 ct2; |
1244 | ||
1245 | ct2.clk_id = CLOCK_REALTIME; | |
6e95dea7 | 1246 | ioctl_get_cycle_timer2(client, (union ioctl_arg *)&ct2); |
abfe5a01 | 1247 | |
6e95dea7 SR |
1248 | a->local_time = ct2.tv_sec * USEC_PER_SEC + ct2.tv_nsec / NSEC_PER_USEC; |
1249 | a->cycle_timer = ct2.cycle_timer; | |
4a9bde9b | 1250 | |
a64408b9 SR |
1251 | return 0; |
1252 | } | |
1253 | ||
b1bda4cd JFSR |
1254 | static void iso_resource_work(struct work_struct *work) |
1255 | { | |
1256 | struct iso_resource_event *e; | |
1257 | struct iso_resource *r = | |
1258 | container_of(work, struct iso_resource, work.work); | |
1259 | struct client *client = r->client; | |
1260 | int generation, channel, bandwidth, todo; | |
1261 | bool skip, free, success; | |
1262 | ||
1263 | spin_lock_irq(&client->lock); | |
1264 | generation = client->device->generation; | |
1265 | todo = r->todo; | |
1266 | /* Allow 1000ms grace period for other reallocations. */ | |
1267 | if (todo == ISO_RES_ALLOC && | |
e71084af CL |
1268 | time_before64(get_jiffies_64(), |
1269 | client->device->card->reset_jiffies + HZ)) { | |
9fb551bf | 1270 | schedule_iso_resource(r, DIV_ROUND_UP(HZ, 3)); |
b1bda4cd JFSR |
1271 | skip = true; |
1272 | } else { | |
1273 | /* We could be called twice within the same generation. */ | |
1274 | skip = todo == ISO_RES_REALLOC && | |
1275 | r->generation == generation; | |
1276 | } | |
1ec3c026 SR |
1277 | free = todo == ISO_RES_DEALLOC || |
1278 | todo == ISO_RES_ALLOC_ONCE || | |
1279 | todo == ISO_RES_DEALLOC_ONCE; | |
b1bda4cd JFSR |
1280 | r->generation = generation; |
1281 | spin_unlock_irq(&client->lock); | |
1282 | ||
1283 | if (skip) | |
1284 | goto out; | |
1285 | ||
1286 | bandwidth = r->bandwidth; | |
1287 | ||
1288 | fw_iso_resource_manage(client->device->card, generation, | |
1289 | r->channels, &channel, &bandwidth, | |
1ec3c026 SR |
1290 | todo == ISO_RES_ALLOC || |
1291 | todo == ISO_RES_REALLOC || | |
f30e6d3e | 1292 | todo == ISO_RES_ALLOC_ONCE); |
b1bda4cd JFSR |
1293 | /* |
1294 | * Is this generation outdated already? As long as this resource sticks | |
1295 | * in the idr, it will be scheduled again for a newer generation or at | |
1296 | * shutdown. | |
1297 | */ | |
1298 | if (channel == -EAGAIN && | |
1299 | (todo == ISO_RES_ALLOC || todo == ISO_RES_REALLOC)) | |
1300 | goto out; | |
1301 | ||
1302 | success = channel >= 0 || bandwidth > 0; | |
1303 | ||
1304 | spin_lock_irq(&client->lock); | |
1305 | /* | |
1306 | * Transit from allocation to reallocation, except if the client | |
1307 | * requested deallocation in the meantime. | |
1308 | */ | |
1309 | if (r->todo == ISO_RES_ALLOC) | |
1310 | r->todo = ISO_RES_REALLOC; | |
1311 | /* | |
1312 | * Allocation or reallocation failure? Pull this resource out of the | |
1313 | * idr and prepare for deletion, unless the client is shutting down. | |
1314 | */ | |
1315 | if (r->todo == ISO_RES_REALLOC && !success && | |
1316 | !client->in_shutdown && | |
d3e709e6 | 1317 | idr_remove(&client->resource_idr, r->resource.handle)) { |
b1bda4cd JFSR |
1318 | client_put(client); |
1319 | free = true; | |
1320 | } | |
1321 | spin_unlock_irq(&client->lock); | |
1322 | ||
1323 | if (todo == ISO_RES_ALLOC && channel >= 0) | |
5d9cb7d2 | 1324 | r->channels = 1ULL << channel; |
b1bda4cd JFSR |
1325 | |
1326 | if (todo == ISO_RES_REALLOC && success) | |
1327 | goto out; | |
1328 | ||
1ec3c026 | 1329 | if (todo == ISO_RES_ALLOC || todo == ISO_RES_ALLOC_ONCE) { |
b1bda4cd JFSR |
1330 | e = r->e_alloc; |
1331 | r->e_alloc = NULL; | |
1332 | } else { | |
1333 | e = r->e_dealloc; | |
1334 | r->e_dealloc = NULL; | |
1335 | } | |
e21fcf79 SR |
1336 | e->iso_resource.handle = r->resource.handle; |
1337 | e->iso_resource.channel = channel; | |
1338 | e->iso_resource.bandwidth = bandwidth; | |
b1bda4cd JFSR |
1339 | |
1340 | queue_event(client, &e->event, | |
e21fcf79 | 1341 | &e->iso_resource, sizeof(e->iso_resource), NULL, 0); |
b1bda4cd JFSR |
1342 | |
1343 | if (free) { | |
1344 | cancel_delayed_work(&r->work); | |
1345 | kfree(r->e_alloc); | |
1346 | kfree(r->e_dealloc); | |
1347 | kfree(r); | |
1348 | } | |
1349 | out: | |
1350 | client_put(client); | |
1351 | } | |
1352 | ||
b1bda4cd JFSR |
1353 | static void release_iso_resource(struct client *client, |
1354 | struct client_resource *resource) | |
1355 | { | |
1356 | struct iso_resource *r = | |
1357 | container_of(resource, struct iso_resource, resource); | |
1358 | ||
1359 | spin_lock_irq(&client->lock); | |
1360 | r->todo = ISO_RES_DEALLOC; | |
9fb551bf | 1361 | schedule_iso_resource(r, 0); |
b1bda4cd JFSR |
1362 | spin_unlock_irq(&client->lock); |
1363 | } | |
1364 | ||
1ec3c026 SR |
1365 | static int init_iso_resource(struct client *client, |
1366 | struct fw_cdev_allocate_iso_resource *request, int todo) | |
b1bda4cd | 1367 | { |
b1bda4cd JFSR |
1368 | struct iso_resource_event *e1, *e2; |
1369 | struct iso_resource *r; | |
1370 | int ret; | |
1371 | ||
1372 | if ((request->channels == 0 && request->bandwidth == 0) || | |
bdabfa54 | 1373 | request->bandwidth > BANDWIDTH_AVAILABLE_INITIAL) |
b1bda4cd JFSR |
1374 | return -EINVAL; |
1375 | ||
1376 | r = kmalloc(sizeof(*r), GFP_KERNEL); | |
1377 | e1 = kmalloc(sizeof(*e1), GFP_KERNEL); | |
1378 | e2 = kmalloc(sizeof(*e2), GFP_KERNEL); | |
1379 | if (r == NULL || e1 == NULL || e2 == NULL) { | |
1380 | ret = -ENOMEM; | |
1381 | goto fail; | |
1382 | } | |
1383 | ||
1384 | INIT_DELAYED_WORK(&r->work, iso_resource_work); | |
1385 | r->client = client; | |
1ec3c026 | 1386 | r->todo = todo; |
b1bda4cd JFSR |
1387 | r->generation = -1; |
1388 | r->channels = request->channels; | |
1389 | r->bandwidth = request->bandwidth; | |
1390 | r->e_alloc = e1; | |
1391 | r->e_dealloc = e2; | |
1392 | ||
e21fcf79 SR |
1393 | e1->iso_resource.closure = request->closure; |
1394 | e1->iso_resource.type = FW_CDEV_EVENT_ISO_RESOURCE_ALLOCATED; | |
1395 | e2->iso_resource.closure = request->closure; | |
1396 | e2->iso_resource.type = FW_CDEV_EVENT_ISO_RESOURCE_DEALLOCATED; | |
b1bda4cd | 1397 | |
1ec3c026 SR |
1398 | if (todo == ISO_RES_ALLOC) { |
1399 | r->resource.release = release_iso_resource; | |
1400 | ret = add_client_resource(client, &r->resource, GFP_KERNEL); | |
81610b8f SR |
1401 | if (ret < 0) |
1402 | goto fail; | |
1ec3c026 SR |
1403 | } else { |
1404 | r->resource.release = NULL; | |
1405 | r->resource.handle = -1; | |
9fb551bf | 1406 | schedule_iso_resource(r, 0); |
1ec3c026 | 1407 | } |
b1bda4cd JFSR |
1408 | request->handle = r->resource.handle; |
1409 | ||
1410 | return 0; | |
1411 | fail: | |
1412 | kfree(r); | |
1413 | kfree(e1); | |
1414 | kfree(e2); | |
1415 | ||
1416 | return ret; | |
1417 | } | |
1418 | ||
6e95dea7 SR |
1419 | static int ioctl_allocate_iso_resource(struct client *client, |
1420 | union ioctl_arg *arg) | |
1ec3c026 | 1421 | { |
6e95dea7 SR |
1422 | return init_iso_resource(client, |
1423 | &arg->allocate_iso_resource, ISO_RES_ALLOC); | |
1ec3c026 SR |
1424 | } |
1425 | ||
6e95dea7 SR |
1426 | static int ioctl_deallocate_iso_resource(struct client *client, |
1427 | union ioctl_arg *arg) | |
b1bda4cd | 1428 | { |
6e95dea7 SR |
1429 | return release_client_resource(client, |
1430 | arg->deallocate.handle, release_iso_resource, NULL); | |
b1bda4cd JFSR |
1431 | } |
1432 | ||
6e95dea7 SR |
1433 | static int ioctl_allocate_iso_resource_once(struct client *client, |
1434 | union ioctl_arg *arg) | |
1ec3c026 | 1435 | { |
6e95dea7 SR |
1436 | return init_iso_resource(client, |
1437 | &arg->allocate_iso_resource, ISO_RES_ALLOC_ONCE); | |
1ec3c026 SR |
1438 | } |
1439 | ||
6e95dea7 SR |
1440 | static int ioctl_deallocate_iso_resource_once(struct client *client, |
1441 | union ioctl_arg *arg) | |
1ec3c026 | 1442 | { |
6e95dea7 SR |
1443 | return init_iso_resource(client, |
1444 | &arg->allocate_iso_resource, ISO_RES_DEALLOC_ONCE); | |
1ec3c026 SR |
1445 | } |
1446 | ||
c8a25900 SR |
1447 | /* |
1448 | * Returns a speed code: Maximum speed to or from this device, | |
1449 | * limited by the device's link speed, the local node's link speed, | |
1450 | * and all PHY port speeds between the two links. | |
1451 | */ | |
6e95dea7 | 1452 | static int ioctl_get_speed(struct client *client, union ioctl_arg *arg) |
33580a3e | 1453 | { |
c8a25900 | 1454 | return client->device->max_speed; |
33580a3e SR |
1455 | } |
1456 | ||
6e95dea7 SR |
1457 | static int ioctl_send_broadcast_request(struct client *client, |
1458 | union ioctl_arg *arg) | |
acfe8333 | 1459 | { |
6e95dea7 | 1460 | struct fw_cdev_send_request *a = &arg->send_request; |
acfe8333 | 1461 | |
6e95dea7 | 1462 | switch (a->tcode) { |
acfe8333 JFSR |
1463 | case TCODE_WRITE_QUADLET_REQUEST: |
1464 | case TCODE_WRITE_BLOCK_REQUEST: | |
1465 | break; | |
1466 | default: | |
1467 | return -EINVAL; | |
1468 | } | |
1469 | ||
1566f3dc | 1470 | /* Security policy: Only allow accesses to Units Space. */ |
6e95dea7 | 1471 | if (a->offset < CSR_REGISTER_BASE + CSR_CONFIG_ROM_END) |
1566f3dc SR |
1472 | return -EACCES; |
1473 | ||
6e95dea7 | 1474 | return init_request(client, a, LOCAL_BUS | 0x3f, SCODE_100); |
acfe8333 JFSR |
1475 | } |
1476 | ||
6e95dea7 | 1477 | static int ioctl_send_stream_packet(struct client *client, union ioctl_arg *arg) |
f8c2287c | 1478 | { |
6e95dea7 | 1479 | struct fw_cdev_send_stream_packet *a = &arg->send_stream_packet; |
18e9b10f SR |
1480 | struct fw_cdev_send_request request; |
1481 | int dest; | |
f8c2287c | 1482 | |
6e95dea7 SR |
1483 | if (a->speed > client->device->card->link_speed || |
1484 | a->length > 1024 << a->speed) | |
18e9b10f | 1485 | return -EIO; |
f8c2287c | 1486 | |
6e95dea7 | 1487 | if (a->tag > 3 || a->channel > 63 || a->sy > 15) |
18e9b10f SR |
1488 | return -EINVAL; |
1489 | ||
6e95dea7 | 1490 | dest = fw_stream_packet_destination_id(a->tag, a->channel, a->sy); |
18e9b10f | 1491 | request.tcode = TCODE_STREAM_DATA; |
6e95dea7 SR |
1492 | request.length = a->length; |
1493 | request.closure = a->closure; | |
1494 | request.data = a->data; | |
1495 | request.generation = a->generation; | |
18e9b10f | 1496 | |
6e95dea7 | 1497 | return init_request(client, &request, dest, a->speed); |
f8c2287c JF |
1498 | } |
1499 | ||
850bb6f2 SR |
1500 | static void outbound_phy_packet_callback(struct fw_packet *packet, |
1501 | struct fw_card *card, int status) | |
1502 | { | |
1503 | struct outbound_phy_packet_event *e = | |
1504 | container_of(packet, struct outbound_phy_packet_event, p); | |
b7c81f80 | 1505 | struct client *e_client; |
850bb6f2 SR |
1506 | |
1507 | switch (status) { | |
1508 | /* expected: */ | |
1509 | case ACK_COMPLETE: e->phy_packet.rcode = RCODE_COMPLETE; break; | |
1510 | /* should never happen with PHY packets: */ | |
1511 | case ACK_PENDING: e->phy_packet.rcode = RCODE_COMPLETE; break; | |
1512 | case ACK_BUSY_X: | |
1513 | case ACK_BUSY_A: | |
1514 | case ACK_BUSY_B: e->phy_packet.rcode = RCODE_BUSY; break; | |
1515 | case ACK_DATA_ERROR: e->phy_packet.rcode = RCODE_DATA_ERROR; break; | |
1516 | case ACK_TYPE_ERROR: e->phy_packet.rcode = RCODE_TYPE_ERROR; break; | |
1517 | /* stale generation; cancelled; on certain controllers: no ack */ | |
1518 | default: e->phy_packet.rcode = status; break; | |
1519 | } | |
cc550216 | 1520 | e->phy_packet.data[0] = packet->timestamp; |
850bb6f2 | 1521 | |
b7c81f80 | 1522 | e_client = e->client; |
cc550216 SR |
1523 | queue_event(e->client, &e->event, &e->phy_packet, |
1524 | sizeof(e->phy_packet) + e->phy_packet.length, NULL, 0); | |
b7c81f80 | 1525 | client_put(e_client); |
850bb6f2 SR |
1526 | } |
1527 | ||
1528 | static int ioctl_send_phy_packet(struct client *client, union ioctl_arg *arg) | |
1529 | { | |
1530 | struct fw_cdev_send_phy_packet *a = &arg->send_phy_packet; | |
1531 | struct fw_card *card = client->device->card; | |
1532 | struct outbound_phy_packet_event *e; | |
1533 | ||
1534 | /* Access policy: Allow this ioctl only on local nodes' device files. */ | |
1535 | if (!client->device->is_local) | |
1536 | return -ENOSYS; | |
1537 | ||
cc550216 | 1538 | e = kzalloc(sizeof(*e) + 4, GFP_KERNEL); |
850bb6f2 SR |
1539 | if (e == NULL) |
1540 | return -ENOMEM; | |
1541 | ||
1542 | client_get(client); | |
1543 | e->client = client; | |
1544 | e->p.speed = SCODE_100; | |
1545 | e->p.generation = a->generation; | |
5b06db16 CL |
1546 | e->p.header[0] = TCODE_LINK_INTERNAL << 4; |
1547 | e->p.header[1] = a->data[0]; | |
1548 | e->p.header[2] = a->data[1]; | |
1549 | e->p.header_length = 12; | |
850bb6f2 SR |
1550 | e->p.callback = outbound_phy_packet_callback; |
1551 | e->phy_packet.closure = a->closure; | |
1552 | e->phy_packet.type = FW_CDEV_EVENT_PHY_PACKET_SENT; | |
cc550216 SR |
1553 | if (is_ping_packet(a->data)) |
1554 | e->phy_packet.length = 4; | |
850bb6f2 SR |
1555 | |
1556 | card->driver->send_request(card, &e->p); | |
1557 | ||
1558 | return 0; | |
1559 | } | |
1560 | ||
bf54e146 SR |
1561 | static int ioctl_receive_phy_packets(struct client *client, union ioctl_arg *arg) |
1562 | { | |
1563 | struct fw_cdev_receive_phy_packets *a = &arg->receive_phy_packets; | |
1564 | struct fw_card *card = client->device->card; | |
1565 | ||
1566 | /* Access policy: Allow this ioctl only on local nodes' device files. */ | |
1567 | if (!client->device->is_local) | |
1568 | return -ENOSYS; | |
1569 | ||
1570 | spin_lock_irq(&card->lock); | |
1571 | ||
1572 | list_move_tail(&client->phy_receiver_link, &card->phy_receiver_list); | |
1573 | client->phy_receiver_closure = a->closure; | |
1574 | ||
1575 | spin_unlock_irq(&card->lock); | |
1576 | ||
1577 | return 0; | |
1578 | } | |
1579 | ||
1580 | void fw_cdev_handle_phy_packet(struct fw_card *card, struct fw_packet *p) | |
1581 | { | |
1582 | struct client *client; | |
1583 | struct inbound_phy_packet_event *e; | |
1584 | unsigned long flags; | |
1585 | ||
1586 | spin_lock_irqsave(&card->lock, flags); | |
1587 | ||
1588 | list_for_each_entry(client, &card->phy_receiver_list, phy_receiver_link) { | |
1589 | e = kmalloc(sizeof(*e) + 8, GFP_ATOMIC); | |
cfb0c9d1 | 1590 | if (e == NULL) |
bf54e146 | 1591 | break; |
cfb0c9d1 | 1592 | |
bf54e146 SR |
1593 | e->phy_packet.closure = client->phy_receiver_closure; |
1594 | e->phy_packet.type = FW_CDEV_EVENT_PHY_PACKET_RECEIVED; | |
1595 | e->phy_packet.rcode = RCODE_COMPLETE; | |
1596 | e->phy_packet.length = 8; | |
1597 | e->phy_packet.data[0] = p->header[1]; | |
1598 | e->phy_packet.data[1] = p->header[2]; | |
1599 | queue_event(client, &e->event, | |
1600 | &e->phy_packet, sizeof(e->phy_packet) + 8, NULL, 0); | |
1601 | } | |
1602 | ||
1603 | spin_unlock_irqrestore(&card->lock, flags); | |
1604 | } | |
1605 | ||
6e95dea7 | 1606 | static int (* const ioctl_handlers[])(struct client *, union ioctl_arg *) = { |
b9dc61cf SR |
1607 | [0x00] = ioctl_get_info, |
1608 | [0x01] = ioctl_send_request, | |
1609 | [0x02] = ioctl_allocate, | |
1610 | [0x03] = ioctl_deallocate, | |
1611 | [0x04] = ioctl_send_response, | |
1612 | [0x05] = ioctl_initiate_bus_reset, | |
1613 | [0x06] = ioctl_add_descriptor, | |
1614 | [0x07] = ioctl_remove_descriptor, | |
1615 | [0x08] = ioctl_create_iso_context, | |
1616 | [0x09] = ioctl_queue_iso, | |
1617 | [0x0a] = ioctl_start_iso, | |
1618 | [0x0b] = ioctl_stop_iso, | |
1619 | [0x0c] = ioctl_get_cycle_timer, | |
1620 | [0x0d] = ioctl_allocate_iso_resource, | |
1621 | [0x0e] = ioctl_deallocate_iso_resource, | |
1622 | [0x0f] = ioctl_allocate_iso_resource_once, | |
1623 | [0x10] = ioctl_deallocate_iso_resource_once, | |
1624 | [0x11] = ioctl_get_speed, | |
1625 | [0x12] = ioctl_send_broadcast_request, | |
1626 | [0x13] = ioctl_send_stream_packet, | |
1627 | [0x14] = ioctl_get_cycle_timer2, | |
850bb6f2 | 1628 | [0x15] = ioctl_send_phy_packet, |
bf54e146 | 1629 | [0x16] = ioctl_receive_phy_packets, |
872e330e | 1630 | [0x17] = ioctl_set_iso_channels, |
d1bbd209 | 1631 | [0x18] = ioctl_flush_iso, |
4f259223 KH |
1632 | }; |
1633 | ||
53dca511 SR |
1634 | static int dispatch_ioctl(struct client *client, |
1635 | unsigned int cmd, void __user *arg) | |
19a15b93 | 1636 | { |
6e95dea7 | 1637 | union ioctl_arg buffer; |
2dbd7d7e | 1638 | int ret; |
4f259223 | 1639 | |
64582298 SR |
1640 | if (fw_device_is_shutdown(client->device)) |
1641 | return -ENODEV; | |
1642 | ||
4f259223 | 1643 | if (_IOC_TYPE(cmd) != '#' || |
9cac00b8 SR |
1644 | _IOC_NR(cmd) >= ARRAY_SIZE(ioctl_handlers) || |
1645 | _IOC_SIZE(cmd) > sizeof(buffer)) | |
d873d794 | 1646 | return -ENOTTY; |
4f259223 | 1647 | |
eaca2d8e | 1648 | memset(&buffer, 0, sizeof(buffer)); |
9cac00b8 SR |
1649 | |
1650 | if (_IOC_DIR(cmd) & _IOC_WRITE) | |
1651 | if (copy_from_user(&buffer, arg, _IOC_SIZE(cmd))) | |
4f259223 | 1652 | return -EFAULT; |
4f259223 | 1653 | |
6e95dea7 | 1654 | ret = ioctl_handlers[_IOC_NR(cmd)](client, &buffer); |
2dbd7d7e SR |
1655 | if (ret < 0) |
1656 | return ret; | |
4f259223 | 1657 | |
9cac00b8 SR |
1658 | if (_IOC_DIR(cmd) & _IOC_READ) |
1659 | if (copy_to_user(arg, &buffer, _IOC_SIZE(cmd))) | |
4f259223 | 1660 | return -EFAULT; |
4f259223 | 1661 | |
2dbd7d7e | 1662 | return ret; |
19a15b93 KH |
1663 | } |
1664 | ||
53dca511 SR |
1665 | static long fw_device_op_ioctl(struct file *file, |
1666 | unsigned int cmd, unsigned long arg) | |
19a15b93 | 1667 | { |
64582298 | 1668 | return dispatch_ioctl(file->private_data, cmd, (void __user *)arg); |
19a15b93 KH |
1669 | } |
1670 | ||
19a15b93 KH |
1671 | static int fw_device_op_mmap(struct file *file, struct vm_area_struct *vma) |
1672 | { | |
1673 | struct client *client = file->private_data; | |
9aad8125 | 1674 | unsigned long size; |
2dbd7d7e | 1675 | int page_count, ret; |
9aad8125 | 1676 | |
551f4cb9 JF |
1677 | if (fw_device_is_shutdown(client->device)) |
1678 | return -ENODEV; | |
1679 | ||
9aad8125 KH |
1680 | /* FIXME: We could support multiple buffers, but we don't. */ |
1681 | if (client->buffer.pages != NULL) | |
1682 | return -EBUSY; | |
1683 | ||
1684 | if (!(vma->vm_flags & VM_SHARED)) | |
1685 | return -EINVAL; | |
19a15b93 | 1686 | |
9aad8125 | 1687 | if (vma->vm_start & ~PAGE_MASK) |
19a15b93 KH |
1688 | return -EINVAL; |
1689 | ||
1690 | client->vm_start = vma->vm_start; | |
9aad8125 KH |
1691 | size = vma->vm_end - vma->vm_start; |
1692 | page_count = size >> PAGE_SHIFT; | |
1693 | if (size & ~PAGE_MASK) | |
1694 | return -EINVAL; | |
1695 | ||
0b6c4857 | 1696 | ret = fw_iso_buffer_alloc(&client->buffer, page_count); |
2dbd7d7e SR |
1697 | if (ret < 0) |
1698 | return ret; | |
19a15b93 | 1699 | |
0b6c4857 SR |
1700 | spin_lock_irq(&client->lock); |
1701 | if (client->iso_context) { | |
1702 | ret = fw_iso_buffer_map_dma(&client->buffer, | |
1703 | client->device->card, | |
1704 | iso_dma_direction(client->iso_context)); | |
1705 | client->buffer_is_mapped = (ret == 0); | |
1706 | } | |
1707 | spin_unlock_irq(&client->lock); | |
2dbd7d7e | 1708 | if (ret < 0) |
0b6c4857 | 1709 | goto fail; |
9aad8125 | 1710 | |
7807759e SR |
1711 | ret = vm_map_pages_zero(vma, client->buffer.pages, |
1712 | client->buffer.page_count); | |
0b6c4857 SR |
1713 | if (ret < 0) |
1714 | goto fail; | |
1715 | ||
1716 | return 0; | |
1717 | fail: | |
1718 | fw_iso_buffer_destroy(&client->buffer, client->device->card); | |
2dbd7d7e | 1719 | return ret; |
19a15b93 KH |
1720 | } |
1721 | ||
5a5e62da CL |
1722 | static int is_outbound_transaction_resource(int id, void *p, void *data) |
1723 | { | |
1724 | struct client_resource *resource = p; | |
1725 | ||
1726 | return resource->release == release_transaction; | |
1727 | } | |
1728 | ||
1729 | static int has_outbound_transactions(struct client *client) | |
1730 | { | |
1731 | int ret; | |
1732 | ||
1733 | spin_lock_irq(&client->lock); | |
1734 | ret = idr_for_each(&client->resource_idr, | |
1735 | is_outbound_transaction_resource, NULL); | |
1736 | spin_unlock_irq(&client->lock); | |
1737 | ||
1738 | return ret; | |
1739 | } | |
1740 | ||
45ee3199 JF |
1741 | static int shutdown_resource(int id, void *p, void *data) |
1742 | { | |
e21fcf79 | 1743 | struct client_resource *resource = p; |
45ee3199 JF |
1744 | struct client *client = data; |
1745 | ||
e21fcf79 | 1746 | resource->release(client, resource); |
fb443036 | 1747 | client_put(client); |
45ee3199 JF |
1748 | |
1749 | return 0; | |
1750 | } | |
1751 | ||
19a15b93 KH |
1752 | static int fw_device_op_release(struct inode *inode, struct file *file) |
1753 | { | |
1754 | struct client *client = file->private_data; | |
e21fcf79 | 1755 | struct event *event, *next_event; |
19a15b93 | 1756 | |
bf54e146 SR |
1757 | spin_lock_irq(&client->device->card->lock); |
1758 | list_del(&client->phy_receiver_link); | |
1759 | spin_unlock_irq(&client->device->card->lock); | |
1760 | ||
97811e34 SR |
1761 | mutex_lock(&client->device->client_list_mutex); |
1762 | list_del(&client->link); | |
1763 | mutex_unlock(&client->device->client_list_mutex); | |
1764 | ||
19a15b93 KH |
1765 | if (client->iso_context) |
1766 | fw_iso_context_destroy(client->iso_context); | |
1767 | ||
36a755cf SR |
1768 | if (client->buffer.pages) |
1769 | fw_iso_buffer_destroy(&client->buffer, client->device->card); | |
1770 | ||
45ee3199 | 1771 | /* Freeze client->resource_idr and client->event_list */ |
3ba94986 | 1772 | spin_lock_irq(&client->lock); |
45ee3199 | 1773 | client->in_shutdown = true; |
3ba94986 | 1774 | spin_unlock_irq(&client->lock); |
66dea3e5 | 1775 | |
5a5e62da CL |
1776 | wait_event(client->tx_flush_wait, !has_outbound_transactions(client)); |
1777 | ||
45ee3199 | 1778 | idr_for_each(&client->resource_idr, shutdown_resource, client); |
45ee3199 | 1779 | idr_destroy(&client->resource_idr); |
28cf6a04 | 1780 | |
e21fcf79 SR |
1781 | list_for_each_entry_safe(event, next_event, &client->event_list, link) |
1782 | kfree(event); | |
19a15b93 | 1783 | |
fb443036 | 1784 | client_put(client); |
19a15b93 KH |
1785 | |
1786 | return 0; | |
1787 | } | |
1788 | ||
afc9a42b | 1789 | static __poll_t fw_device_op_poll(struct file *file, poll_table * pt) |
19a15b93 KH |
1790 | { |
1791 | struct client *client = file->private_data; | |
afc9a42b | 1792 | __poll_t mask = 0; |
19a15b93 KH |
1793 | |
1794 | poll_wait(file, &client->wait, pt); | |
1795 | ||
2603bf21 | 1796 | if (fw_device_is_shutdown(client->device)) |
a9a08845 | 1797 | mask |= EPOLLHUP | EPOLLERR; |
19a15b93 | 1798 | if (!list_empty(&client->event_list)) |
a9a08845 | 1799 | mask |= EPOLLIN | EPOLLRDNORM; |
2603bf21 KH |
1800 | |
1801 | return mask; | |
19a15b93 KH |
1802 | } |
1803 | ||
21ebcd12 | 1804 | const struct file_operations fw_device_ops = { |
19a15b93 | 1805 | .owner = THIS_MODULE, |
3ac26b2e | 1806 | .llseek = no_llseek, |
19a15b93 KH |
1807 | .open = fw_device_op_open, |
1808 | .read = fw_device_op_read, | |
1809 | .unlocked_ioctl = fw_device_op_ioctl, | |
19a15b93 | 1810 | .mmap = fw_device_op_mmap, |
3ac26b2e SR |
1811 | .release = fw_device_op_release, |
1812 | .poll = fw_device_op_poll, | |
407e9ef7 | 1813 | .compat_ioctl = compat_ptr_ioctl, |
19a15b93 | 1814 | }; |