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 | 113 | struct fw_request *request; |
e6996002 | 114 | bool is_fcp; |
97c18b7f SR |
115 | void *data; |
116 | size_t length; | |
117 | }; | |
118 | ||
119 | struct descriptor_resource { | |
120 | struct client_resource resource; | |
121 | struct fw_descriptor descriptor; | |
c38e7e21 | 122 | u32 data[]; |
97c18b7f SR |
123 | }; |
124 | ||
b1bda4cd JFSR |
125 | struct iso_resource { |
126 | struct client_resource resource; | |
127 | struct client *client; | |
128 | /* Schedule work and access todo only with client->lock held. */ | |
129 | struct delayed_work work; | |
1ec3c026 SR |
130 | enum {ISO_RES_ALLOC, ISO_RES_REALLOC, ISO_RES_DEALLOC, |
131 | ISO_RES_ALLOC_ONCE, ISO_RES_DEALLOC_ONCE,} todo; | |
b1bda4cd JFSR |
132 | int generation; |
133 | u64 channels; | |
134 | s32 bandwidth; | |
135 | struct iso_resource_event *e_alloc, *e_dealloc; | |
136 | }; | |
137 | ||
b1bda4cd JFSR |
138 | static void release_iso_resource(struct client *, struct client_resource *); |
139 | ||
9fb551bf SR |
140 | static void schedule_iso_resource(struct iso_resource *r, unsigned long delay) |
141 | { | |
142 | client_get(r->client); | |
105e53f8 | 143 | if (!queue_delayed_work(fw_workqueue, &r->work, delay)) |
9fb551bf SR |
144 | client_put(r->client); |
145 | } | |
146 | ||
147 | static void schedule_if_iso_resource(struct client_resource *resource) | |
148 | { | |
149 | if (resource->release == release_iso_resource) | |
150 | schedule_iso_resource(container_of(resource, | |
151 | struct iso_resource, resource), 0); | |
152 | } | |
153 | ||
97c18b7f SR |
154 | /* |
155 | * dequeue_event() just kfree()'s the event, so the event has to be | |
156 | * the first field in a struct XYZ_event. | |
157 | */ | |
158 | struct event { | |
159 | struct { void *data; size_t size; } v[2]; | |
160 | struct list_head link; | |
161 | }; | |
162 | ||
163 | struct bus_reset_event { | |
164 | struct event event; | |
165 | struct fw_cdev_event_bus_reset reset; | |
166 | }; | |
167 | ||
168 | struct outbound_transaction_event { | |
169 | struct event event; | |
170 | struct client *client; | |
171 | struct outbound_transaction_resource r; | |
172 | struct fw_cdev_event_response response; | |
173 | }; | |
174 | ||
175 | struct inbound_transaction_event { | |
176 | struct event event; | |
e205597d SR |
177 | union { |
178 | struct fw_cdev_event_request request; | |
179 | struct fw_cdev_event_request2 request2; | |
180 | } req; | |
97c18b7f SR |
181 | }; |
182 | ||
183 | struct iso_interrupt_event { | |
184 | struct event event; | |
185 | struct fw_cdev_event_iso_interrupt interrupt; | |
186 | }; | |
187 | ||
872e330e SR |
188 | struct iso_interrupt_mc_event { |
189 | struct event event; | |
190 | struct fw_cdev_event_iso_interrupt_mc interrupt; | |
191 | }; | |
192 | ||
b1bda4cd JFSR |
193 | struct iso_resource_event { |
194 | struct event event; | |
e21fcf79 | 195 | struct fw_cdev_event_iso_resource iso_resource; |
b1bda4cd JFSR |
196 | }; |
197 | ||
850bb6f2 SR |
198 | struct outbound_phy_packet_event { |
199 | struct event event; | |
200 | struct client *client; | |
201 | struct fw_packet p; | |
202 | struct fw_cdev_event_phy_packet phy_packet; | |
203 | }; | |
204 | ||
bf54e146 SR |
205 | struct inbound_phy_packet_event { |
206 | struct event event; | |
207 | struct fw_cdev_event_phy_packet phy_packet; | |
208 | }; | |
209 | ||
9c1176b6 SR |
210 | #ifdef CONFIG_COMPAT |
211 | static void __user *u64_to_uptr(u64 value) | |
212 | { | |
a25045ff | 213 | if (in_compat_syscall()) |
9c1176b6 SR |
214 | return compat_ptr(value); |
215 | else | |
216 | return (void __user *)(unsigned long)value; | |
217 | } | |
218 | ||
219 | static u64 uptr_to_u64(void __user *ptr) | |
220 | { | |
a25045ff | 221 | if (in_compat_syscall()) |
9c1176b6 SR |
222 | return ptr_to_compat(ptr); |
223 | else | |
224 | return (u64)(unsigned long)ptr; | |
225 | } | |
226 | #else | |
227 | static inline void __user *u64_to_uptr(u64 value) | |
19a15b93 KH |
228 | { |
229 | return (void __user *)(unsigned long)value; | |
230 | } | |
231 | ||
9c1176b6 | 232 | static inline u64 uptr_to_u64(void __user *ptr) |
19a15b93 | 233 | { |
9c1176b6 | 234 | return (u64)(unsigned long)ptr; |
19a15b93 | 235 | } |
9c1176b6 | 236 | #endif /* CONFIG_COMPAT */ |
19a15b93 KH |
237 | |
238 | static int fw_device_op_open(struct inode *inode, struct file *file) | |
239 | { | |
240 | struct fw_device *device; | |
241 | struct client *client; | |
242 | ||
96b19062 | 243 | device = fw_device_get_by_devt(inode->i_rdev); |
a3aca3da KH |
244 | if (device == NULL) |
245 | return -ENODEV; | |
19a15b93 | 246 | |
551f4cb9 JF |
247 | if (fw_device_is_shutdown(device)) { |
248 | fw_device_put(device); | |
249 | return -ENODEV; | |
250 | } | |
251 | ||
2d826cc5 | 252 | client = kzalloc(sizeof(*client), GFP_KERNEL); |
96b19062 SR |
253 | if (client == NULL) { |
254 | fw_device_put(device); | |
19a15b93 | 255 | return -ENOMEM; |
96b19062 | 256 | } |
19a15b93 | 257 | |
96b19062 | 258 | client->device = device; |
19a15b93 | 259 | spin_lock_init(&client->lock); |
45ee3199 JF |
260 | idr_init(&client->resource_idr); |
261 | INIT_LIST_HEAD(&client->event_list); | |
19a15b93 | 262 | init_waitqueue_head(&client->wait); |
5a5e62da | 263 | init_waitqueue_head(&client->tx_flush_wait); |
bf54e146 | 264 | INIT_LIST_HEAD(&client->phy_receiver_link); |
93b37905 | 265 | INIT_LIST_HEAD(&client->link); |
fb443036 | 266 | kref_init(&client->kref); |
19a15b93 KH |
267 | |
268 | file->private_data = client; | |
269 | ||
3ac26b2e | 270 | return nonseekable_open(inode, file); |
19a15b93 KH |
271 | } |
272 | ||
273 | static void queue_event(struct client *client, struct event *event, | |
274 | void *data0, size_t size0, void *data1, size_t size1) | |
275 | { | |
276 | unsigned long flags; | |
277 | ||
278 | event->v[0].data = data0; | |
279 | event->v[0].size = size0; | |
280 | event->v[1].data = data1; | |
281 | event->v[1].size = size1; | |
282 | ||
283 | spin_lock_irqsave(&client->lock, flags); | |
45ee3199 JF |
284 | if (client->in_shutdown) |
285 | kfree(event); | |
286 | else | |
287 | list_add_tail(&event->link, &client->event_list); | |
19a15b93 | 288 | spin_unlock_irqrestore(&client->lock, flags); |
83431cba JF |
289 | |
290 | wake_up_interruptible(&client->wait); | |
19a15b93 KH |
291 | } |
292 | ||
53dca511 SR |
293 | static int dequeue_event(struct client *client, |
294 | char __user *buffer, size_t count) | |
19a15b93 | 295 | { |
19a15b93 KH |
296 | struct event *event; |
297 | size_t size, total; | |
2dbd7d7e | 298 | int i, ret; |
19a15b93 | 299 | |
2dbd7d7e SR |
300 | ret = wait_event_interruptible(client->wait, |
301 | !list_empty(&client->event_list) || | |
302 | fw_device_is_shutdown(client->device)); | |
303 | if (ret < 0) | |
304 | return ret; | |
19a15b93 | 305 | |
2603bf21 KH |
306 | if (list_empty(&client->event_list) && |
307 | fw_device_is_shutdown(client->device)) | |
308 | return -ENODEV; | |
19a15b93 | 309 | |
3ba94986 | 310 | spin_lock_irq(&client->lock); |
a459b8ab | 311 | event = list_first_entry(&client->event_list, struct event, link); |
19a15b93 | 312 | list_del(&event->link); |
3ba94986 | 313 | spin_unlock_irq(&client->lock); |
19a15b93 | 314 | |
19a15b93 KH |
315 | total = 0; |
316 | for (i = 0; i < ARRAY_SIZE(event->v) && total < count; i++) { | |
317 | size = min(event->v[i].size, count - total); | |
2603bf21 | 318 | if (copy_to_user(buffer + total, event->v[i].data, size)) { |
2dbd7d7e | 319 | ret = -EFAULT; |
19a15b93 | 320 | goto out; |
2603bf21 | 321 | } |
19a15b93 KH |
322 | total += size; |
323 | } | |
2dbd7d7e | 324 | ret = total; |
19a15b93 KH |
325 | |
326 | out: | |
327 | kfree(event); | |
328 | ||
2dbd7d7e | 329 | return ret; |
19a15b93 KH |
330 | } |
331 | ||
53dca511 SR |
332 | static ssize_t fw_device_op_read(struct file *file, char __user *buffer, |
333 | size_t count, loff_t *offset) | |
19a15b93 KH |
334 | { |
335 | struct client *client = file->private_data; | |
336 | ||
337 | return dequeue_event(client, buffer, count); | |
338 | } | |
339 | ||
53dca511 SR |
340 | static void fill_bus_reset_event(struct fw_cdev_event_bus_reset *event, |
341 | struct client *client) | |
344bbc4d | 342 | { |
da8ecffa | 343 | struct fw_card *card = client->device->card; |
cf417e54 | 344 | |
3ba94986 | 345 | spin_lock_irq(&card->lock); |
344bbc4d | 346 | |
da8ecffa | 347 | event->closure = client->bus_reset_closure; |
344bbc4d | 348 | event->type = FW_CDEV_EVENT_BUS_RESET; |
cf5a56ac | 349 | event->generation = client->device->generation; |
da8ecffa | 350 | event->node_id = client->device->node_id; |
344bbc4d | 351 | event->local_node_id = card->local_node->node_id; |
250b2b6d | 352 | event->bm_node_id = card->bm_node_id; |
344bbc4d KH |
353 | event->irm_node_id = card->irm_node->node_id; |
354 | event->root_node_id = card->root_node->node_id; | |
cf417e54 | 355 | |
3ba94986 | 356 | spin_unlock_irq(&card->lock); |
344bbc4d KH |
357 | } |
358 | ||
53dca511 SR |
359 | static void for_each_client(struct fw_device *device, |
360 | void (*callback)(struct client *client)) | |
2603bf21 | 361 | { |
2603bf21 | 362 | struct client *c; |
2603bf21 | 363 | |
d67cfb96 | 364 | mutex_lock(&device->client_list_mutex); |
2603bf21 KH |
365 | list_for_each_entry(c, &device->client_list, link) |
366 | callback(c); | |
d67cfb96 | 367 | mutex_unlock(&device->client_list_mutex); |
2603bf21 KH |
368 | } |
369 | ||
b1bda4cd JFSR |
370 | static int schedule_reallocations(int id, void *p, void *data) |
371 | { | |
9fb551bf | 372 | schedule_if_iso_resource(p); |
b1bda4cd | 373 | |
b1bda4cd JFSR |
374 | return 0; |
375 | } | |
376 | ||
53dca511 | 377 | static void queue_bus_reset_event(struct client *client) |
97bd9efa | 378 | { |
97c18b7f | 379 | struct bus_reset_event *e; |
97bd9efa | 380 | |
97c18b7f | 381 | e = kzalloc(sizeof(*e), GFP_KERNEL); |
cfb0c9d1 | 382 | if (e == NULL) |
97bd9efa | 383 | return; |
97bd9efa | 384 | |
97c18b7f | 385 | fill_bus_reset_event(&e->reset, client); |
97bd9efa | 386 | |
97c18b7f SR |
387 | queue_event(client, &e->event, |
388 | &e->reset, sizeof(e->reset), NULL, 0); | |
b1bda4cd JFSR |
389 | |
390 | spin_lock_irq(&client->lock); | |
391 | idr_for_each(&client->resource_idr, schedule_reallocations, client); | |
392 | spin_unlock_irq(&client->lock); | |
97bd9efa KH |
393 | } |
394 | ||
395 | void fw_device_cdev_update(struct fw_device *device) | |
396 | { | |
2603bf21 KH |
397 | for_each_client(device, queue_bus_reset_event); |
398 | } | |
97bd9efa | 399 | |
2603bf21 KH |
400 | static void wake_up_client(struct client *client) |
401 | { | |
402 | wake_up_interruptible(&client->wait); | |
403 | } | |
97bd9efa | 404 | |
2603bf21 KH |
405 | void fw_device_cdev_remove(struct fw_device *device) |
406 | { | |
407 | for_each_client(device, wake_up_client); | |
97bd9efa KH |
408 | } |
409 | ||
6e95dea7 SR |
410 | union ioctl_arg { |
411 | struct fw_cdev_get_info get_info; | |
412 | struct fw_cdev_send_request send_request; | |
413 | struct fw_cdev_allocate allocate; | |
414 | struct fw_cdev_deallocate deallocate; | |
415 | struct fw_cdev_send_response send_response; | |
416 | struct fw_cdev_initiate_bus_reset initiate_bus_reset; | |
417 | struct fw_cdev_add_descriptor add_descriptor; | |
418 | struct fw_cdev_remove_descriptor remove_descriptor; | |
419 | struct fw_cdev_create_iso_context create_iso_context; | |
420 | struct fw_cdev_queue_iso queue_iso; | |
421 | struct fw_cdev_start_iso start_iso; | |
422 | struct fw_cdev_stop_iso stop_iso; | |
423 | struct fw_cdev_get_cycle_timer get_cycle_timer; | |
424 | struct fw_cdev_allocate_iso_resource allocate_iso_resource; | |
425 | struct fw_cdev_send_stream_packet send_stream_packet; | |
426 | struct fw_cdev_get_cycle_timer2 get_cycle_timer2; | |
850bb6f2 | 427 | struct fw_cdev_send_phy_packet send_phy_packet; |
bf54e146 | 428 | struct fw_cdev_receive_phy_packets receive_phy_packets; |
872e330e | 429 | struct fw_cdev_set_iso_channels set_iso_channels; |
d1bbd209 | 430 | struct fw_cdev_flush_iso flush_iso; |
6e95dea7 SR |
431 | }; |
432 | ||
433 | static int ioctl_get_info(struct client *client, union ioctl_arg *arg) | |
19a15b93 | 434 | { |
6e95dea7 | 435 | struct fw_cdev_get_info *a = &arg->get_info; |
344bbc4d | 436 | struct fw_cdev_event_bus_reset bus_reset; |
c9755e14 | 437 | unsigned long ret = 0; |
344bbc4d | 438 | |
6e95dea7 | 439 | client->version = a->version; |
604f4516 | 440 | a->version = FW_CDEV_KERNEL_VERSION; |
6e95dea7 | 441 | a->card = client->device->card->index; |
344bbc4d | 442 | |
c9755e14 SR |
443 | down_read(&fw_device_rwsem); |
444 | ||
6e95dea7 SR |
445 | if (a->rom != 0) { |
446 | size_t want = a->rom_length; | |
d84702a5 | 447 | size_t have = client->device->config_rom_length * 4; |
344bbc4d | 448 | |
6e95dea7 SR |
449 | ret = copy_to_user(u64_to_uptr(a->rom), |
450 | client->device->config_rom, min(want, have)); | |
344bbc4d | 451 | } |
6e95dea7 | 452 | a->rom_length = client->device->config_rom_length * 4; |
344bbc4d | 453 | |
c9755e14 SR |
454 | up_read(&fw_device_rwsem); |
455 | ||
456 | if (ret != 0) | |
457 | return -EFAULT; | |
458 | ||
93b37905 SR |
459 | mutex_lock(&client->device->client_list_mutex); |
460 | ||
6e95dea7 SR |
461 | client->bus_reset_closure = a->bus_reset_closure; |
462 | if (a->bus_reset != 0) { | |
da8ecffa | 463 | fill_bus_reset_event(&bus_reset, client); |
790198f7 SR |
464 | /* unaligned size of bus_reset is 36 bytes */ |
465 | ret = copy_to_user(u64_to_uptr(a->bus_reset), &bus_reset, 36); | |
344bbc4d | 466 | } |
93b37905 SR |
467 | if (ret == 0 && list_empty(&client->link)) |
468 | list_add_tail(&client->link, &client->device->client_list); | |
19a15b93 | 469 | |
93b37905 SR |
470 | mutex_unlock(&client->device->client_list_mutex); |
471 | ||
472 | return ret ? -EFAULT : 0; | |
19a15b93 KH |
473 | } |
474 | ||
53dca511 SR |
475 | static int add_client_resource(struct client *client, |
476 | struct client_resource *resource, gfp_t gfp_mask) | |
3964a449 | 477 | { |
d0164adc | 478 | bool preload = gfpflags_allow_blocking(gfp_mask); |
3964a449 | 479 | unsigned long flags; |
45ee3199 JF |
480 | int ret; |
481 | ||
37b61890 TH |
482 | if (preload) |
483 | idr_preload(gfp_mask); | |
3964a449 | 484 | spin_lock_irqsave(&client->lock, flags); |
37b61890 | 485 | |
45ee3199 JF |
486 | if (client->in_shutdown) |
487 | ret = -ECANCELED; | |
488 | else | |
37b61890 TH |
489 | ret = idr_alloc(&client->resource_idr, resource, 0, 0, |
490 | GFP_NOWAIT); | |
b1bda4cd | 491 | if (ret >= 0) { |
37b61890 | 492 | resource->handle = ret; |
fb443036 | 493 | client_get(client); |
9fb551bf | 494 | schedule_if_iso_resource(resource); |
b1bda4cd | 495 | } |
45ee3199 | 496 | |
37b61890 TH |
497 | spin_unlock_irqrestore(&client->lock, flags); |
498 | if (preload) | |
499 | idr_preload_end(); | |
45ee3199 JF |
500 | |
501 | return ret < 0 ? ret : 0; | |
3964a449 KH |
502 | } |
503 | ||
53dca511 SR |
504 | static int release_client_resource(struct client *client, u32 handle, |
505 | client_resource_release_fn_t release, | |
e21fcf79 | 506 | struct client_resource **return_resource) |
3964a449 | 507 | { |
e21fcf79 | 508 | struct client_resource *resource; |
3964a449 | 509 | |
3ba94986 | 510 | spin_lock_irq(&client->lock); |
45ee3199 | 511 | if (client->in_shutdown) |
e21fcf79 | 512 | resource = NULL; |
45ee3199 | 513 | else |
e21fcf79 SR |
514 | resource = idr_find(&client->resource_idr, handle); |
515 | if (resource && resource->release == release) | |
45ee3199 | 516 | idr_remove(&client->resource_idr, handle); |
3ba94986 | 517 | spin_unlock_irq(&client->lock); |
3964a449 | 518 | |
e21fcf79 | 519 | if (!(resource && resource->release == release)) |
3964a449 KH |
520 | return -EINVAL; |
521 | ||
e21fcf79 SR |
522 | if (return_resource) |
523 | *return_resource = resource; | |
3964a449 | 524 | else |
e21fcf79 | 525 | resource->release(client, resource); |
3964a449 | 526 | |
fb443036 SR |
527 | client_put(client); |
528 | ||
3964a449 KH |
529 | return 0; |
530 | } | |
531 | ||
53dca511 SR |
532 | static void release_transaction(struct client *client, |
533 | struct client_resource *resource) | |
3964a449 | 534 | { |
3964a449 KH |
535 | } |
536 | ||
53dca511 SR |
537 | static void complete_transaction(struct fw_card *card, int rcode, |
538 | void *payload, size_t length, void *data) | |
19a15b93 | 539 | { |
97c18b7f SR |
540 | struct outbound_transaction_event *e = data; |
541 | struct fw_cdev_event_response *rsp = &e->response; | |
542 | struct client *client = e->client; | |
28cf6a04 | 543 | unsigned long flags; |
19a15b93 | 544 | |
97c18b7f SR |
545 | if (length < rsp->length) |
546 | rsp->length = length; | |
19a15b93 | 547 | if (rcode == RCODE_COMPLETE) |
97c18b7f | 548 | memcpy(rsp->data, payload, rsp->length); |
19a15b93 | 549 | |
28cf6a04 | 550 | spin_lock_irqsave(&client->lock, flags); |
5a5e62da CL |
551 | idr_remove(&client->resource_idr, e->r.resource.handle); |
552 | if (client->in_shutdown) | |
553 | wake_up(&client->tx_flush_wait); | |
28cf6a04 KH |
554 | spin_unlock_irqrestore(&client->lock, flags); |
555 | ||
97c18b7f SR |
556 | rsp->type = FW_CDEV_EVENT_RESPONSE; |
557 | rsp->rcode = rcode; | |
8401d92b DM |
558 | |
559 | /* | |
97c18b7f | 560 | * In the case that sizeof(*rsp) doesn't align with the position of the |
8401d92b DM |
561 | * data, and the read is short, preserve an extra copy of the data |
562 | * to stay compatible with a pre-2.6.27 bug. Since the bug is harmless | |
563 | * for short reads and some apps depended on it, this is both safe | |
564 | * and prudent for compatibility. | |
565 | */ | |
97c18b7f SR |
566 | if (rsp->length <= sizeof(*rsp) - offsetof(typeof(*rsp), data)) |
567 | queue_event(client, &e->event, rsp, sizeof(*rsp), | |
568 | rsp->data, rsp->length); | |
8401d92b | 569 | else |
97c18b7f | 570 | queue_event(client, &e->event, rsp, sizeof(*rsp) + rsp->length, |
8401d92b | 571 | NULL, 0); |
fb443036 | 572 | |
5a5e62da CL |
573 | /* Drop the idr's reference */ |
574 | client_put(client); | |
19a15b93 KH |
575 | } |
576 | ||
acfe8333 JFSR |
577 | static int init_request(struct client *client, |
578 | struct fw_cdev_send_request *request, | |
579 | int destination_id, int speed) | |
19a15b93 | 580 | { |
97c18b7f | 581 | struct outbound_transaction_event *e; |
1f3125af | 582 | int ret; |
19a15b93 | 583 | |
18e9b10f SR |
584 | if (request->tcode != TCODE_STREAM_DATA && |
585 | (request->length > 4096 || request->length > 512 << speed)) | |
5d3fd692 | 586 | return -EIO; |
19a15b93 | 587 | |
a8e93f3d CL |
588 | if (request->tcode == TCODE_WRITE_QUADLET_REQUEST && |
589 | request->length < 4) | |
590 | return -EINVAL; | |
591 | ||
97c18b7f SR |
592 | e = kmalloc(sizeof(*e) + request->length, GFP_KERNEL); |
593 | if (e == NULL) | |
19a15b93 KH |
594 | return -ENOMEM; |
595 | ||
97c18b7f SR |
596 | e->client = client; |
597 | e->response.length = request->length; | |
598 | e->response.closure = request->closure; | |
19a15b93 | 599 | |
4f259223 | 600 | if (request->data && |
97c18b7f | 601 | copy_from_user(e->response.data, |
4f259223 | 602 | u64_to_uptr(request->data), request->length)) { |
1f3125af | 603 | ret = -EFAULT; |
45ee3199 | 604 | goto failed; |
1f3125af SR |
605 | } |
606 | ||
97c18b7f SR |
607 | e->r.resource.release = release_transaction; |
608 | ret = add_client_resource(client, &e->r.resource, GFP_KERNEL); | |
45ee3199 JF |
609 | if (ret < 0) |
610 | goto failed; | |
28cf6a04 | 611 | |
acfe8333 | 612 | fw_send_request(client->device->card, &e->r.transaction, |
664d8010 SR |
613 | request->tcode, destination_id, request->generation, |
614 | speed, request->offset, e->response.data, | |
615 | request->length, complete_transaction, e); | |
616 | return 0; | |
19a15b93 | 617 | |
45ee3199 | 618 | failed: |
97c18b7f | 619 | kfree(e); |
1f3125af SR |
620 | |
621 | return ret; | |
19a15b93 KH |
622 | } |
623 | ||
6e95dea7 | 624 | static int ioctl_send_request(struct client *client, union ioctl_arg *arg) |
acfe8333 | 625 | { |
6e95dea7 | 626 | switch (arg->send_request.tcode) { |
acfe8333 JFSR |
627 | case TCODE_WRITE_QUADLET_REQUEST: |
628 | case TCODE_WRITE_BLOCK_REQUEST: | |
629 | case TCODE_READ_QUADLET_REQUEST: | |
630 | case TCODE_READ_BLOCK_REQUEST: | |
631 | case TCODE_LOCK_MASK_SWAP: | |
632 | case TCODE_LOCK_COMPARE_SWAP: | |
633 | case TCODE_LOCK_FETCH_ADD: | |
634 | case TCODE_LOCK_LITTLE_ADD: | |
635 | case TCODE_LOCK_BOUNDED_ADD: | |
636 | case TCODE_LOCK_WRAP_ADD: | |
637 | case TCODE_LOCK_VENDOR_DEPENDENT: | |
638 | break; | |
639 | default: | |
640 | return -EINVAL; | |
641 | } | |
642 | ||
6e95dea7 | 643 | return init_request(client, &arg->send_request, client->device->node_id, |
acfe8333 JFSR |
644 | client->device->max_speed); |
645 | } | |
646 | ||
53dca511 SR |
647 | static void release_request(struct client *client, |
648 | struct client_resource *resource) | |
3964a449 | 649 | { |
97c18b7f SR |
650 | struct inbound_transaction_resource *r = container_of(resource, |
651 | struct inbound_transaction_resource, resource); | |
3964a449 | 652 | |
e6996002 | 653 | if (r->is_fcp) |
39859be8 | 654 | fw_request_put(r->request); |
281e2032 | 655 | else |
08bd34c9 | 656 | fw_send_response(r->card, r->request, RCODE_CONFLICT_ERROR); |
0244f573 SR |
657 | |
658 | fw_card_put(r->card); | |
97c18b7f | 659 | kfree(r); |
3964a449 KH |
660 | } |
661 | ||
97c18b7f | 662 | static void handle_request(struct fw_card *card, struct fw_request *request, |
53dca511 | 663 | int tcode, int destination, int source, |
33e553fe | 664 | int generation, unsigned long long offset, |
53dca511 | 665 | void *payload, size_t length, void *callback_data) |
19a15b93 | 666 | { |
97c18b7f | 667 | struct address_handler_resource *handler = callback_data; |
e6996002 | 668 | bool is_fcp = is_in_fcp_region(offset, length); |
97c18b7f SR |
669 | struct inbound_transaction_resource *r; |
670 | struct inbound_transaction_event *e; | |
e205597d | 671 | size_t event_size0; |
45ee3199 | 672 | int ret; |
19a15b93 | 673 | |
0244f573 SR |
674 | /* card may be different from handler->client->device->card */ |
675 | fw_card_get(card); | |
676 | ||
39859be8 TS |
677 | // Extend the lifetime of data for request so that its payload is safely accessible in |
678 | // the process context for the client. | |
679 | if (is_fcp) | |
680 | fw_request_get(request); | |
681 | ||
97c18b7f | 682 | r = kmalloc(sizeof(*r), GFP_ATOMIC); |
2d826cc5 | 683 | e = kmalloc(sizeof(*e), GFP_ATOMIC); |
cfb0c9d1 | 684 | if (r == NULL || e == NULL) |
45ee3199 | 685 | goto failed; |
cfb0c9d1 | 686 | |
08bd34c9 | 687 | r->card = card; |
97c18b7f | 688 | r->request = request; |
e6996002 | 689 | r->is_fcp = is_fcp; |
97c18b7f SR |
690 | r->data = payload; |
691 | r->length = length; | |
19a15b93 | 692 | |
97c18b7f SR |
693 | r->resource.release = release_request; |
694 | ret = add_client_resource(handler->client, &r->resource, GFP_ATOMIC); | |
45ee3199 JF |
695 | if (ret < 0) |
696 | goto failed; | |
19a15b93 | 697 | |
e205597d SR |
698 | if (handler->client->version < FW_CDEV_VERSION_EVENT_REQUEST2) { |
699 | struct fw_cdev_event_request *req = &e->req.request; | |
700 | ||
701 | if (tcode & 0x10) | |
702 | tcode = TCODE_LOCK_REQUEST; | |
703 | ||
704 | req->type = FW_CDEV_EVENT_REQUEST; | |
705 | req->tcode = tcode; | |
706 | req->offset = offset; | |
707 | req->length = length; | |
708 | req->handle = r->resource.handle; | |
709 | req->closure = handler->closure; | |
710 | event_size0 = sizeof(*req); | |
711 | } else { | |
712 | struct fw_cdev_event_request2 *req = &e->req.request2; | |
713 | ||
714 | req->type = FW_CDEV_EVENT_REQUEST2; | |
715 | req->tcode = tcode; | |
716 | req->offset = offset; | |
717 | req->source_node_id = source; | |
718 | req->destination_node_id = destination; | |
719 | req->card = card->index; | |
720 | req->generation = generation; | |
721 | req->length = length; | |
722 | req->handle = r->resource.handle; | |
723 | req->closure = handler->closure; | |
724 | event_size0 = sizeof(*req); | |
725 | } | |
19a15b93 | 726 | |
97c18b7f | 727 | queue_event(handler->client, &e->event, |
e205597d | 728 | &e->req, event_size0, r->data, length); |
45ee3199 JF |
729 | return; |
730 | ||
731 | failed: | |
97c18b7f | 732 | kfree(r); |
45ee3199 | 733 | kfree(e); |
281e2032 | 734 | |
e6996002 | 735 | if (!is_fcp) |
db5d247a | 736 | fw_send_response(card, request, RCODE_CONFLICT_ERROR); |
39859be8 TS |
737 | else |
738 | fw_request_put(request); | |
0244f573 SR |
739 | |
740 | fw_card_put(card); | |
19a15b93 KH |
741 | } |
742 | ||
53dca511 SR |
743 | static void release_address_handler(struct client *client, |
744 | struct client_resource *resource) | |
3964a449 | 745 | { |
97c18b7f SR |
746 | struct address_handler_resource *r = |
747 | container_of(resource, struct address_handler_resource, resource); | |
3964a449 | 748 | |
97c18b7f SR |
749 | fw_core_remove_address_handler(&r->handler); |
750 | kfree(r); | |
3964a449 KH |
751 | } |
752 | ||
6e95dea7 | 753 | static int ioctl_allocate(struct client *client, union ioctl_arg *arg) |
19a15b93 | 754 | { |
6e95dea7 | 755 | struct fw_cdev_allocate *a = &arg->allocate; |
97c18b7f | 756 | struct address_handler_resource *r; |
19a15b93 | 757 | struct fw_address_region region; |
45ee3199 | 758 | int ret; |
19a15b93 | 759 | |
97c18b7f SR |
760 | r = kmalloc(sizeof(*r), GFP_KERNEL); |
761 | if (r == NULL) | |
19a15b93 KH |
762 | return -ENOMEM; |
763 | ||
6e95dea7 | 764 | region.start = a->offset; |
8e2b2b46 SR |
765 | if (client->version < FW_CDEV_VERSION_ALLOCATE_REGION_END) |
766 | region.end = a->offset + a->length; | |
767 | else | |
768 | region.end = a->region_end; | |
769 | ||
6e95dea7 | 770 | r->handler.length = a->length; |
97c18b7f | 771 | r->handler.address_callback = handle_request; |
6e95dea7 SR |
772 | r->handler.callback_data = r; |
773 | r->closure = a->closure; | |
774 | r->client = client; | |
19a15b93 | 775 | |
97c18b7f | 776 | ret = fw_core_add_address_handler(&r->handler, ®ion); |
3e0b5f0d | 777 | if (ret < 0) { |
97c18b7f | 778 | kfree(r); |
3e0b5f0d | 779 | return ret; |
19a15b93 | 780 | } |
8e2b2b46 | 781 | a->offset = r->handler.offset; |
19a15b93 | 782 | |
97c18b7f SR |
783 | r->resource.release = release_address_handler; |
784 | ret = add_client_resource(client, &r->resource, GFP_KERNEL); | |
45ee3199 | 785 | if (ret < 0) { |
97c18b7f | 786 | release_address_handler(client, &r->resource); |
45ee3199 JF |
787 | return ret; |
788 | } | |
6e95dea7 | 789 | a->handle = r->resource.handle; |
19a15b93 KH |
790 | |
791 | return 0; | |
792 | } | |
793 | ||
6e95dea7 | 794 | static int ioctl_deallocate(struct client *client, union ioctl_arg *arg) |
9472316b | 795 | { |
6e95dea7 | 796 | return release_client_resource(client, arg->deallocate.handle, |
45ee3199 | 797 | release_address_handler, NULL); |
9472316b KH |
798 | } |
799 | ||
6e95dea7 | 800 | static int ioctl_send_response(struct client *client, union ioctl_arg *arg) |
19a15b93 | 801 | { |
6e95dea7 | 802 | struct fw_cdev_send_response *a = &arg->send_response; |
3964a449 | 803 | struct client_resource *resource; |
97c18b7f | 804 | struct inbound_transaction_resource *r; |
7e44c0b5 | 805 | int ret = 0; |
19a15b93 | 806 | |
6e95dea7 | 807 | if (release_client_resource(client, a->handle, |
45ee3199 | 808 | release_request, &resource) < 0) |
19a15b93 | 809 | return -EINVAL; |
45ee3199 | 810 | |
97c18b7f SR |
811 | r = container_of(resource, struct inbound_transaction_resource, |
812 | resource); | |
e6996002 | 813 | if (r->is_fcp) { |
39859be8 | 814 | fw_request_put(r->request); |
281e2032 | 815 | goto out; |
531390a2 | 816 | } |
281e2032 | 817 | |
a10c0ce7 CL |
818 | if (a->length != fw_get_response_length(r->request)) { |
819 | ret = -EINVAL; | |
13a55d6b | 820 | fw_request_put(r->request); |
a10c0ce7 CL |
821 | goto out; |
822 | } | |
823 | if (copy_from_user(r->data, u64_to_uptr(a->data), a->length)) { | |
281e2032 | 824 | ret = -EFAULT; |
13a55d6b | 825 | fw_request_put(r->request); |
281e2032 | 826 | goto out; |
7e44c0b5 | 827 | } |
08bd34c9 | 828 | fw_send_response(r->card, r->request, a->rcode); |
7e44c0b5 | 829 | out: |
0244f573 | 830 | fw_card_put(r->card); |
19a15b93 KH |
831 | kfree(r); |
832 | ||
7e44c0b5 | 833 | return ret; |
19a15b93 KH |
834 | } |
835 | ||
6e95dea7 | 836 | static int ioctl_initiate_bus_reset(struct client *client, union ioctl_arg *arg) |
5371842b | 837 | { |
02d37bed | 838 | fw_schedule_bus_reset(client->device->card, true, |
6e95dea7 | 839 | arg->initiate_bus_reset.type == FW_CDEV_SHORT_RESET); |
02d37bed | 840 | return 0; |
5371842b KH |
841 | } |
842 | ||
3964a449 KH |
843 | static void release_descriptor(struct client *client, |
844 | struct client_resource *resource) | |
845 | { | |
97c18b7f SR |
846 | struct descriptor_resource *r = |
847 | container_of(resource, struct descriptor_resource, resource); | |
3964a449 | 848 | |
97c18b7f SR |
849 | fw_core_remove_descriptor(&r->descriptor); |
850 | kfree(r); | |
3964a449 KH |
851 | } |
852 | ||
6e95dea7 | 853 | static int ioctl_add_descriptor(struct client *client, union ioctl_arg *arg) |
66dea3e5 | 854 | { |
6e95dea7 | 855 | struct fw_cdev_add_descriptor *a = &arg->add_descriptor; |
97c18b7f | 856 | struct descriptor_resource *r; |
45ee3199 | 857 | int ret; |
66dea3e5 | 858 | |
de487da8 | 859 | /* Access policy: Allow this ioctl only on local nodes' device files. */ |
92368890 | 860 | if (!client->device->is_local) |
de487da8 SR |
861 | return -ENOSYS; |
862 | ||
6e95dea7 | 863 | if (a->length > 256) |
66dea3e5 KH |
864 | return -EINVAL; |
865 | ||
6e95dea7 | 866 | r = kmalloc(sizeof(*r) + a->length * 4, GFP_KERNEL); |
97c18b7f | 867 | if (r == NULL) |
66dea3e5 KH |
868 | return -ENOMEM; |
869 | ||
6e95dea7 | 870 | if (copy_from_user(r->data, u64_to_uptr(a->data), a->length * 4)) { |
45ee3199 JF |
871 | ret = -EFAULT; |
872 | goto failed; | |
66dea3e5 KH |
873 | } |
874 | ||
6e95dea7 SR |
875 | r->descriptor.length = a->length; |
876 | r->descriptor.immediate = a->immediate; | |
877 | r->descriptor.key = a->key; | |
97c18b7f | 878 | r->descriptor.data = r->data; |
66dea3e5 | 879 | |
97c18b7f | 880 | ret = fw_core_add_descriptor(&r->descriptor); |
45ee3199 JF |
881 | if (ret < 0) |
882 | goto failed; | |
66dea3e5 | 883 | |
97c18b7f SR |
884 | r->resource.release = release_descriptor; |
885 | ret = add_client_resource(client, &r->resource, GFP_KERNEL); | |
45ee3199 | 886 | if (ret < 0) { |
97c18b7f | 887 | fw_core_remove_descriptor(&r->descriptor); |
45ee3199 JF |
888 | goto failed; |
889 | } | |
6e95dea7 | 890 | a->handle = r->resource.handle; |
66dea3e5 KH |
891 | |
892 | return 0; | |
45ee3199 | 893 | failed: |
97c18b7f | 894 | kfree(r); |
45ee3199 JF |
895 | |
896 | return ret; | |
66dea3e5 KH |
897 | } |
898 | ||
6e95dea7 | 899 | static int ioctl_remove_descriptor(struct client *client, union ioctl_arg *arg) |
66dea3e5 | 900 | { |
6e95dea7 | 901 | return release_client_resource(client, arg->remove_descriptor.handle, |
45ee3199 | 902 | release_descriptor, NULL); |
66dea3e5 KH |
903 | } |
904 | ||
53dca511 SR |
905 | static void iso_callback(struct fw_iso_context *context, u32 cycle, |
906 | size_t header_length, void *header, void *data) | |
19a15b93 KH |
907 | { |
908 | struct client *client = data; | |
97c18b7f | 909 | struct iso_interrupt_event *e; |
19a15b93 | 910 | |
56d04cb1 | 911 | e = kmalloc(sizeof(*e) + header_length, GFP_ATOMIC); |
cfb0c9d1 | 912 | if (e == NULL) |
19a15b93 | 913 | return; |
cfb0c9d1 | 914 | |
97c18b7f SR |
915 | e->interrupt.type = FW_CDEV_EVENT_ISO_INTERRUPT; |
916 | e->interrupt.closure = client->iso_closure; | |
917 | e->interrupt.cycle = cycle; | |
918 | e->interrupt.header_length = header_length; | |
919 | memcpy(e->interrupt.header, header, header_length); | |
920 | queue_event(client, &e->event, &e->interrupt, | |
921 | sizeof(e->interrupt) + header_length, NULL, 0); | |
19a15b93 KH |
922 | } |
923 | ||
872e330e SR |
924 | static void iso_mc_callback(struct fw_iso_context *context, |
925 | dma_addr_t completed, void *data) | |
926 | { | |
927 | struct client *client = data; | |
928 | struct iso_interrupt_mc_event *e; | |
929 | ||
930 | e = kmalloc(sizeof(*e), GFP_ATOMIC); | |
cfb0c9d1 | 931 | if (e == NULL) |
872e330e | 932 | return; |
cfb0c9d1 | 933 | |
872e330e SR |
934 | e->interrupt.type = FW_CDEV_EVENT_ISO_INTERRUPT_MULTICHANNEL; |
935 | e->interrupt.closure = client->iso_closure; | |
936 | e->interrupt.completed = fw_iso_buffer_lookup(&client->buffer, | |
937 | completed); | |
938 | queue_event(client, &e->event, &e->interrupt, | |
939 | sizeof(e->interrupt), NULL, 0); | |
940 | } | |
941 | ||
0b6c4857 SR |
942 | static enum dma_data_direction iso_dma_direction(struct fw_iso_context *context) |
943 | { | |
944 | if (context->type == FW_ISO_CONTEXT_TRANSMIT) | |
945 | return DMA_TO_DEVICE; | |
946 | else | |
947 | return DMA_FROM_DEVICE; | |
948 | } | |
949 | ||
ebe4560e OC |
950 | static struct fw_iso_context *fw_iso_mc_context_create(struct fw_card *card, |
951 | fw_iso_mc_callback_t callback, | |
952 | void *callback_data) | |
953 | { | |
954 | struct fw_iso_context *ctx; | |
955 | ||
956 | ctx = fw_iso_context_create(card, FW_ISO_CONTEXT_RECEIVE_MULTICHANNEL, | |
957 | 0, 0, 0, NULL, callback_data); | |
958 | if (!IS_ERR(ctx)) | |
959 | ctx->callback.mc = callback; | |
960 | ||
961 | return ctx; | |
962 | } | |
963 | ||
6e95dea7 | 964 | static int ioctl_create_iso_context(struct client *client, union ioctl_arg *arg) |
19a15b93 | 965 | { |
6e95dea7 | 966 | struct fw_cdev_create_iso_context *a = &arg->create_iso_context; |
24315c5e | 967 | struct fw_iso_context *context; |
ebe4560e | 968 | union fw_iso_callback cb; |
0b6c4857 | 969 | int ret; |
19a15b93 | 970 | |
eb5b35a5 | 971 | BUILD_BUG_ON(FW_CDEV_ISO_CONTEXT_TRANSMIT != FW_ISO_CONTEXT_TRANSMIT || |
872e330e SR |
972 | FW_CDEV_ISO_CONTEXT_RECEIVE != FW_ISO_CONTEXT_RECEIVE || |
973 | FW_CDEV_ISO_CONTEXT_RECEIVE_MULTICHANNEL != | |
974 | FW_ISO_CONTEXT_RECEIVE_MULTICHANNEL); | |
21efb3cf | 975 | |
6e95dea7 | 976 | switch (a->type) { |
872e330e SR |
977 | case FW_ISO_CONTEXT_TRANSMIT: |
978 | if (a->speed > SCODE_3200 || a->channel > 63) | |
c70dc788 | 979 | return -EINVAL; |
872e330e | 980 | |
ebe4560e | 981 | cb.sc = iso_callback; |
c70dc788 KH |
982 | break; |
983 | ||
872e330e SR |
984 | case FW_ISO_CONTEXT_RECEIVE: |
985 | if (a->header_size < 4 || (a->header_size & 3) || | |
986 | a->channel > 63) | |
c70dc788 | 987 | return -EINVAL; |
872e330e | 988 | |
ebe4560e | 989 | cb.sc = iso_callback; |
872e330e SR |
990 | break; |
991 | ||
992 | case FW_ISO_CONTEXT_RECEIVE_MULTICHANNEL: | |
ebe4560e | 993 | cb.mc = iso_mc_callback; |
c70dc788 KH |
994 | break; |
995 | ||
996 | default: | |
21efb3cf | 997 | return -EINVAL; |
c70dc788 KH |
998 | } |
999 | ||
ebe4560e OC |
1000 | if (a->type == FW_ISO_CONTEXT_RECEIVE_MULTICHANNEL) |
1001 | context = fw_iso_mc_context_create(client->device->card, cb.mc, | |
1002 | client); | |
1003 | else | |
1004 | context = fw_iso_context_create(client->device->card, a->type, | |
1005 | a->channel, a->speed, | |
1006 | a->header_size, cb.sc, client); | |
24315c5e KH |
1007 | if (IS_ERR(context)) |
1008 | return PTR_ERR(context); | |
0699a73a CL |
1009 | if (client->version < FW_CDEV_VERSION_AUTO_FLUSH_ISO_OVERFLOW) |
1010 | context->drop_overflow_headers = true; | |
24315c5e | 1011 | |
bdfe273e CL |
1012 | /* We only support one context at this time. */ |
1013 | spin_lock_irq(&client->lock); | |
1014 | if (client->iso_context != NULL) { | |
1015 | spin_unlock_irq(&client->lock); | |
1016 | fw_iso_context_destroy(context); | |
0b6c4857 | 1017 | |
bdfe273e CL |
1018 | return -EBUSY; |
1019 | } | |
0b6c4857 SR |
1020 | if (!client->buffer_is_mapped) { |
1021 | ret = fw_iso_buffer_map_dma(&client->buffer, | |
1022 | client->device->card, | |
1023 | iso_dma_direction(context)); | |
1024 | if (ret < 0) { | |
1025 | spin_unlock_irq(&client->lock); | |
1026 | fw_iso_context_destroy(context); | |
1027 | ||
1028 | return ret; | |
1029 | } | |
1030 | client->buffer_is_mapped = true; | |
1031 | } | |
6e95dea7 | 1032 | client->iso_closure = a->closure; |
24315c5e | 1033 | client->iso_context = context; |
bdfe273e | 1034 | spin_unlock_irq(&client->lock); |
19a15b93 | 1035 | |
6e95dea7 | 1036 | a->handle = 0; |
abaa5743 | 1037 | |
19a15b93 KH |
1038 | return 0; |
1039 | } | |
1040 | ||
872e330e SR |
1041 | static int ioctl_set_iso_channels(struct client *client, union ioctl_arg *arg) |
1042 | { | |
1043 | struct fw_cdev_set_iso_channels *a = &arg->set_iso_channels; | |
1044 | struct fw_iso_context *ctx = client->iso_context; | |
1045 | ||
1046 | if (ctx == NULL || a->handle != 0) | |
1047 | return -EINVAL; | |
1048 | ||
1049 | return fw_iso_context_set_channels(ctx, &a->channels); | |
1050 | } | |
1051 | ||
1ca31ae7 KH |
1052 | /* Macros for decoding the iso packet control header. */ |
1053 | #define GET_PAYLOAD_LENGTH(v) ((v) & 0xffff) | |
1054 | #define GET_INTERRUPT(v) (((v) >> 16) & 0x01) | |
1055 | #define GET_SKIP(v) (((v) >> 17) & 0x01) | |
7a100344 SR |
1056 | #define GET_TAG(v) (((v) >> 18) & 0x03) |
1057 | #define GET_SY(v) (((v) >> 20) & 0x0f) | |
1ca31ae7 KH |
1058 | #define GET_HEADER_LENGTH(v) (((v) >> 24) & 0xff) |
1059 | ||
6e95dea7 | 1060 | static int ioctl_queue_iso(struct client *client, union ioctl_arg *arg) |
19a15b93 | 1061 | { |
6e95dea7 | 1062 | struct fw_cdev_queue_iso *a = &arg->queue_iso; |
19a15b93 | 1063 | struct fw_cdev_iso_packet __user *p, *end, *next; |
9b32d5f3 | 1064 | struct fw_iso_context *ctx = client->iso_context; |
872e330e | 1065 | unsigned long payload, buffer_end, transmit_header_bytes = 0; |
1ca31ae7 | 1066 | u32 control; |
19a15b93 KH |
1067 | int count; |
1068 | struct { | |
1069 | struct fw_iso_packet packet; | |
1070 | u8 header[256]; | |
1071 | } u; | |
1072 | ||
6e95dea7 | 1073 | if (ctx == NULL || a->handle != 0) |
19a15b93 | 1074 | return -EINVAL; |
19a15b93 | 1075 | |
c781c06d KH |
1076 | /* |
1077 | * If the user passes a non-NULL data pointer, has mmap()'ed | |
19a15b93 KH |
1078 | * the iso buffer, and the pointer points inside the buffer, |
1079 | * we setup the payload pointers accordingly. Otherwise we | |
9aad8125 | 1080 | * set them both to 0, which will still let packets with |
19a15b93 KH |
1081 | * payload_length == 0 through. In other words, if no packets |
1082 | * use the indirect payload, the iso buffer need not be mapped | |
6e95dea7 | 1083 | * and the a->data pointer is ignored. |
c781c06d | 1084 | */ |
6e95dea7 | 1085 | payload = (unsigned long)a->data - client->vm_start; |
ef370ee7 | 1086 | buffer_end = client->buffer.page_count << PAGE_SHIFT; |
6e95dea7 | 1087 | if (a->data == 0 || client->buffer.pages == NULL || |
ef370ee7 | 1088 | payload >= buffer_end) { |
9aad8125 | 1089 | payload = 0; |
ef370ee7 | 1090 | buffer_end = 0; |
19a15b93 KH |
1091 | } |
1092 | ||
872e330e SR |
1093 | if (ctx->type == FW_ISO_CONTEXT_RECEIVE_MULTICHANNEL && payload & 3) |
1094 | return -EINVAL; | |
1ccc9147 | 1095 | |
872e330e | 1096 | p = (struct fw_cdev_iso_packet __user *)u64_to_uptr(a->packets); |
19a15b93 | 1097 | |
6e95dea7 | 1098 | end = (void __user *)p + a->size; |
19a15b93 KH |
1099 | count = 0; |
1100 | while (p < end) { | |
1ca31ae7 | 1101 | if (get_user(control, &p->control)) |
19a15b93 | 1102 | return -EFAULT; |
1ca31ae7 KH |
1103 | u.packet.payload_length = GET_PAYLOAD_LENGTH(control); |
1104 | u.packet.interrupt = GET_INTERRUPT(control); | |
1105 | u.packet.skip = GET_SKIP(control); | |
1106 | u.packet.tag = GET_TAG(control); | |
1107 | u.packet.sy = GET_SY(control); | |
1108 | u.packet.header_length = GET_HEADER_LENGTH(control); | |
295e3feb | 1109 | |
872e330e SR |
1110 | switch (ctx->type) { |
1111 | case FW_ISO_CONTEXT_TRANSMIT: | |
1112 | if (u.packet.header_length & 3) | |
385ab5bc | 1113 | return -EINVAL; |
ae2a9766 | 1114 | transmit_header_bytes = u.packet.header_length; |
872e330e SR |
1115 | break; |
1116 | ||
1117 | case FW_ISO_CONTEXT_RECEIVE: | |
69e61d0c SR |
1118 | if (u.packet.header_length == 0 || |
1119 | u.packet.header_length % ctx->header_size != 0) | |
385ab5bc | 1120 | return -EINVAL; |
872e330e SR |
1121 | break; |
1122 | ||
1123 | case FW_ISO_CONTEXT_RECEIVE_MULTICHANNEL: | |
1124 | if (u.packet.payload_length == 0 || | |
1125 | u.packet.payload_length & 3) | |
295e3feb | 1126 | return -EINVAL; |
872e330e | 1127 | break; |
295e3feb KH |
1128 | } |
1129 | ||
19a15b93 | 1130 | next = (struct fw_cdev_iso_packet __user *) |
ae2a9766 | 1131 | &p->header[transmit_header_bytes / 4]; |
19a15b93 KH |
1132 | if (next > end) |
1133 | return -EINVAL; | |
daa98831 | 1134 | if (copy_from_user |
ae2a9766 | 1135 | (u.packet.header, p->header, transmit_header_bytes)) |
19a15b93 | 1136 | return -EFAULT; |
98b6cbe8 | 1137 | if (u.packet.skip && ctx->type == FW_ISO_CONTEXT_TRANSMIT && |
19a15b93 KH |
1138 | u.packet.header_length + u.packet.payload_length > 0) |
1139 | return -EINVAL; | |
ef370ee7 | 1140 | if (payload + u.packet.payload_length > buffer_end) |
19a15b93 KH |
1141 | return -EINVAL; |
1142 | ||
9b32d5f3 KH |
1143 | if (fw_iso_context_queue(ctx, &u.packet, |
1144 | &client->buffer, payload)) | |
19a15b93 KH |
1145 | break; |
1146 | ||
1147 | p = next; | |
1148 | payload += u.packet.payload_length; | |
1149 | count++; | |
1150 | } | |
13882a82 | 1151 | fw_iso_context_queue_flush(ctx); |
19a15b93 | 1152 | |
6e95dea7 SR |
1153 | a->size -= uptr_to_u64(p) - a->packets; |
1154 | a->packets = uptr_to_u64(p); | |
1155 | a->data = client->vm_start + payload; | |
19a15b93 KH |
1156 | |
1157 | return count; | |
1158 | } | |
1159 | ||
6e95dea7 | 1160 | static int ioctl_start_iso(struct client *client, union ioctl_arg *arg) |
19a15b93 | 1161 | { |
6e95dea7 | 1162 | struct fw_cdev_start_iso *a = &arg->start_iso; |
19a15b93 | 1163 | |
eb5b35a5 SR |
1164 | BUILD_BUG_ON( |
1165 | FW_CDEV_ISO_CONTEXT_MATCH_TAG0 != FW_ISO_CONTEXT_MATCH_TAG0 || | |
1166 | FW_CDEV_ISO_CONTEXT_MATCH_TAG1 != FW_ISO_CONTEXT_MATCH_TAG1 || | |
1167 | FW_CDEV_ISO_CONTEXT_MATCH_TAG2 != FW_ISO_CONTEXT_MATCH_TAG2 || | |
1168 | FW_CDEV_ISO_CONTEXT_MATCH_TAG3 != FW_ISO_CONTEXT_MATCH_TAG3 || | |
1169 | FW_CDEV_ISO_CONTEXT_MATCH_ALL_TAGS != FW_ISO_CONTEXT_MATCH_ALL_TAGS); | |
1170 | ||
6e95dea7 | 1171 | if (client->iso_context == NULL || a->handle != 0) |
abaa5743 | 1172 | return -EINVAL; |
fae60312 | 1173 | |
6e95dea7 SR |
1174 | if (client->iso_context->type == FW_ISO_CONTEXT_RECEIVE && |
1175 | (a->tags == 0 || a->tags > 15 || a->sync > 15)) | |
1176 | return -EINVAL; | |
eb0306ea | 1177 | |
6e95dea7 SR |
1178 | return fw_iso_context_start(client->iso_context, |
1179 | a->cycle, a->sync, a->tags); | |
19a15b93 KH |
1180 | } |
1181 | ||
6e95dea7 | 1182 | static int ioctl_stop_iso(struct client *client, union ioctl_arg *arg) |
b8295668 | 1183 | { |
6e95dea7 | 1184 | struct fw_cdev_stop_iso *a = &arg->stop_iso; |
abaa5743 | 1185 | |
6e95dea7 | 1186 | if (client->iso_context == NULL || a->handle != 0) |
abaa5743 KH |
1187 | return -EINVAL; |
1188 | ||
b8295668 KH |
1189 | return fw_iso_context_stop(client->iso_context); |
1190 | } | |
1191 | ||
d1bbd209 CL |
1192 | static int ioctl_flush_iso(struct client *client, union ioctl_arg *arg) |
1193 | { | |
1194 | struct fw_cdev_flush_iso *a = &arg->flush_iso; | |
1195 | ||
1196 | if (client->iso_context == NULL || a->handle != 0) | |
1197 | return -EINVAL; | |
1198 | ||
1199 | return fw_iso_context_flush_completions(client->iso_context); | |
1200 | } | |
1201 | ||
6e95dea7 | 1202 | static int ioctl_get_cycle_timer2(struct client *client, union ioctl_arg *arg) |
a64408b9 | 1203 | { |
6e95dea7 | 1204 | struct fw_cdev_get_cycle_timer2 *a = &arg->get_cycle_timer2; |
a64408b9 | 1205 | struct fw_card *card = client->device->card; |
2c1bb29a | 1206 | struct timespec64 ts = {0, 0}; |
dda8ad0a | 1207 | u32 cycle_time = 0; |
abfe5a01 | 1208 | int ret = 0; |
a64408b9 | 1209 | |
4a9bde9b | 1210 | local_irq_disable(); |
a64408b9 | 1211 | |
baa914cd TS |
1212 | ret = fw_card_read_cycle_time(card, &cycle_time); |
1213 | if (ret < 0) | |
1214 | goto end; | |
abfe5a01 | 1215 | |
6e95dea7 | 1216 | switch (a->clk_id) { |
2c1bb29a AB |
1217 | case CLOCK_REALTIME: ktime_get_real_ts64(&ts); break; |
1218 | case CLOCK_MONOTONIC: ktime_get_ts64(&ts); break; | |
1219 | case CLOCK_MONOTONIC_RAW: ktime_get_raw_ts64(&ts); break; | |
abfe5a01 SR |
1220 | default: |
1221 | ret = -EINVAL; | |
1222 | } | |
baa914cd | 1223 | end: |
4a9bde9b | 1224 | local_irq_enable(); |
a64408b9 | 1225 | |
6e95dea7 SR |
1226 | a->tv_sec = ts.tv_sec; |
1227 | a->tv_nsec = ts.tv_nsec; | |
1228 | a->cycle_timer = cycle_time; | |
abfe5a01 SR |
1229 | |
1230 | return ret; | |
1231 | } | |
1232 | ||
6e95dea7 | 1233 | static int ioctl_get_cycle_timer(struct client *client, union ioctl_arg *arg) |
abfe5a01 | 1234 | { |
6e95dea7 | 1235 | struct fw_cdev_get_cycle_timer *a = &arg->get_cycle_timer; |
abfe5a01 SR |
1236 | struct fw_cdev_get_cycle_timer2 ct2; |
1237 | ||
1238 | ct2.clk_id = CLOCK_REALTIME; | |
6e95dea7 | 1239 | ioctl_get_cycle_timer2(client, (union ioctl_arg *)&ct2); |
abfe5a01 | 1240 | |
6e95dea7 SR |
1241 | a->local_time = ct2.tv_sec * USEC_PER_SEC + ct2.tv_nsec / NSEC_PER_USEC; |
1242 | a->cycle_timer = ct2.cycle_timer; | |
4a9bde9b | 1243 | |
a64408b9 SR |
1244 | return 0; |
1245 | } | |
1246 | ||
b1bda4cd JFSR |
1247 | static void iso_resource_work(struct work_struct *work) |
1248 | { | |
1249 | struct iso_resource_event *e; | |
1250 | struct iso_resource *r = | |
1251 | container_of(work, struct iso_resource, work.work); | |
1252 | struct client *client = r->client; | |
1253 | int generation, channel, bandwidth, todo; | |
1254 | bool skip, free, success; | |
1255 | ||
1256 | spin_lock_irq(&client->lock); | |
1257 | generation = client->device->generation; | |
1258 | todo = r->todo; | |
1259 | /* Allow 1000ms grace period for other reallocations. */ | |
1260 | if (todo == ISO_RES_ALLOC && | |
e71084af CL |
1261 | time_before64(get_jiffies_64(), |
1262 | client->device->card->reset_jiffies + HZ)) { | |
9fb551bf | 1263 | schedule_iso_resource(r, DIV_ROUND_UP(HZ, 3)); |
b1bda4cd JFSR |
1264 | skip = true; |
1265 | } else { | |
1266 | /* We could be called twice within the same generation. */ | |
1267 | skip = todo == ISO_RES_REALLOC && | |
1268 | r->generation == generation; | |
1269 | } | |
1ec3c026 SR |
1270 | free = todo == ISO_RES_DEALLOC || |
1271 | todo == ISO_RES_ALLOC_ONCE || | |
1272 | todo == ISO_RES_DEALLOC_ONCE; | |
b1bda4cd JFSR |
1273 | r->generation = generation; |
1274 | spin_unlock_irq(&client->lock); | |
1275 | ||
1276 | if (skip) | |
1277 | goto out; | |
1278 | ||
1279 | bandwidth = r->bandwidth; | |
1280 | ||
1281 | fw_iso_resource_manage(client->device->card, generation, | |
1282 | r->channels, &channel, &bandwidth, | |
1ec3c026 SR |
1283 | todo == ISO_RES_ALLOC || |
1284 | todo == ISO_RES_REALLOC || | |
f30e6d3e | 1285 | todo == ISO_RES_ALLOC_ONCE); |
b1bda4cd JFSR |
1286 | /* |
1287 | * Is this generation outdated already? As long as this resource sticks | |
1288 | * in the idr, it will be scheduled again for a newer generation or at | |
1289 | * shutdown. | |
1290 | */ | |
1291 | if (channel == -EAGAIN && | |
1292 | (todo == ISO_RES_ALLOC || todo == ISO_RES_REALLOC)) | |
1293 | goto out; | |
1294 | ||
1295 | success = channel >= 0 || bandwidth > 0; | |
1296 | ||
1297 | spin_lock_irq(&client->lock); | |
1298 | /* | |
1299 | * Transit from allocation to reallocation, except if the client | |
1300 | * requested deallocation in the meantime. | |
1301 | */ | |
1302 | if (r->todo == ISO_RES_ALLOC) | |
1303 | r->todo = ISO_RES_REALLOC; | |
1304 | /* | |
1305 | * Allocation or reallocation failure? Pull this resource out of the | |
1306 | * idr and prepare for deletion, unless the client is shutting down. | |
1307 | */ | |
1308 | if (r->todo == ISO_RES_REALLOC && !success && | |
1309 | !client->in_shutdown && | |
d3e709e6 | 1310 | idr_remove(&client->resource_idr, r->resource.handle)) { |
b1bda4cd JFSR |
1311 | client_put(client); |
1312 | free = true; | |
1313 | } | |
1314 | spin_unlock_irq(&client->lock); | |
1315 | ||
1316 | if (todo == ISO_RES_ALLOC && channel >= 0) | |
5d9cb7d2 | 1317 | r->channels = 1ULL << channel; |
b1bda4cd JFSR |
1318 | |
1319 | if (todo == ISO_RES_REALLOC && success) | |
1320 | goto out; | |
1321 | ||
1ec3c026 | 1322 | if (todo == ISO_RES_ALLOC || todo == ISO_RES_ALLOC_ONCE) { |
b1bda4cd JFSR |
1323 | e = r->e_alloc; |
1324 | r->e_alloc = NULL; | |
1325 | } else { | |
1326 | e = r->e_dealloc; | |
1327 | r->e_dealloc = NULL; | |
1328 | } | |
e21fcf79 SR |
1329 | e->iso_resource.handle = r->resource.handle; |
1330 | e->iso_resource.channel = channel; | |
1331 | e->iso_resource.bandwidth = bandwidth; | |
b1bda4cd JFSR |
1332 | |
1333 | queue_event(client, &e->event, | |
e21fcf79 | 1334 | &e->iso_resource, sizeof(e->iso_resource), NULL, 0); |
b1bda4cd JFSR |
1335 | |
1336 | if (free) { | |
1337 | cancel_delayed_work(&r->work); | |
1338 | kfree(r->e_alloc); | |
1339 | kfree(r->e_dealloc); | |
1340 | kfree(r); | |
1341 | } | |
1342 | out: | |
1343 | client_put(client); | |
1344 | } | |
1345 | ||
b1bda4cd JFSR |
1346 | static void release_iso_resource(struct client *client, |
1347 | struct client_resource *resource) | |
1348 | { | |
1349 | struct iso_resource *r = | |
1350 | container_of(resource, struct iso_resource, resource); | |
1351 | ||
1352 | spin_lock_irq(&client->lock); | |
1353 | r->todo = ISO_RES_DEALLOC; | |
9fb551bf | 1354 | schedule_iso_resource(r, 0); |
b1bda4cd JFSR |
1355 | spin_unlock_irq(&client->lock); |
1356 | } | |
1357 | ||
1ec3c026 SR |
1358 | static int init_iso_resource(struct client *client, |
1359 | struct fw_cdev_allocate_iso_resource *request, int todo) | |
b1bda4cd | 1360 | { |
b1bda4cd JFSR |
1361 | struct iso_resource_event *e1, *e2; |
1362 | struct iso_resource *r; | |
1363 | int ret; | |
1364 | ||
1365 | if ((request->channels == 0 && request->bandwidth == 0) || | |
bdabfa54 | 1366 | request->bandwidth > BANDWIDTH_AVAILABLE_INITIAL) |
b1bda4cd JFSR |
1367 | return -EINVAL; |
1368 | ||
1369 | r = kmalloc(sizeof(*r), GFP_KERNEL); | |
1370 | e1 = kmalloc(sizeof(*e1), GFP_KERNEL); | |
1371 | e2 = kmalloc(sizeof(*e2), GFP_KERNEL); | |
1372 | if (r == NULL || e1 == NULL || e2 == NULL) { | |
1373 | ret = -ENOMEM; | |
1374 | goto fail; | |
1375 | } | |
1376 | ||
1377 | INIT_DELAYED_WORK(&r->work, iso_resource_work); | |
1378 | r->client = client; | |
1ec3c026 | 1379 | r->todo = todo; |
b1bda4cd JFSR |
1380 | r->generation = -1; |
1381 | r->channels = request->channels; | |
1382 | r->bandwidth = request->bandwidth; | |
1383 | r->e_alloc = e1; | |
1384 | r->e_dealloc = e2; | |
1385 | ||
e21fcf79 SR |
1386 | e1->iso_resource.closure = request->closure; |
1387 | e1->iso_resource.type = FW_CDEV_EVENT_ISO_RESOURCE_ALLOCATED; | |
1388 | e2->iso_resource.closure = request->closure; | |
1389 | e2->iso_resource.type = FW_CDEV_EVENT_ISO_RESOURCE_DEALLOCATED; | |
b1bda4cd | 1390 | |
1ec3c026 SR |
1391 | if (todo == ISO_RES_ALLOC) { |
1392 | r->resource.release = release_iso_resource; | |
1393 | ret = add_client_resource(client, &r->resource, GFP_KERNEL); | |
81610b8f SR |
1394 | if (ret < 0) |
1395 | goto fail; | |
1ec3c026 SR |
1396 | } else { |
1397 | r->resource.release = NULL; | |
1398 | r->resource.handle = -1; | |
9fb551bf | 1399 | schedule_iso_resource(r, 0); |
1ec3c026 | 1400 | } |
b1bda4cd JFSR |
1401 | request->handle = r->resource.handle; |
1402 | ||
1403 | return 0; | |
1404 | fail: | |
1405 | kfree(r); | |
1406 | kfree(e1); | |
1407 | kfree(e2); | |
1408 | ||
1409 | return ret; | |
1410 | } | |
1411 | ||
6e95dea7 SR |
1412 | static int ioctl_allocate_iso_resource(struct client *client, |
1413 | union ioctl_arg *arg) | |
1ec3c026 | 1414 | { |
6e95dea7 SR |
1415 | return init_iso_resource(client, |
1416 | &arg->allocate_iso_resource, ISO_RES_ALLOC); | |
1ec3c026 SR |
1417 | } |
1418 | ||
6e95dea7 SR |
1419 | static int ioctl_deallocate_iso_resource(struct client *client, |
1420 | union ioctl_arg *arg) | |
b1bda4cd | 1421 | { |
6e95dea7 SR |
1422 | return release_client_resource(client, |
1423 | arg->deallocate.handle, release_iso_resource, NULL); | |
b1bda4cd JFSR |
1424 | } |
1425 | ||
6e95dea7 SR |
1426 | static int ioctl_allocate_iso_resource_once(struct client *client, |
1427 | union ioctl_arg *arg) | |
1ec3c026 | 1428 | { |
6e95dea7 SR |
1429 | return init_iso_resource(client, |
1430 | &arg->allocate_iso_resource, ISO_RES_ALLOC_ONCE); | |
1ec3c026 SR |
1431 | } |
1432 | ||
6e95dea7 SR |
1433 | static int ioctl_deallocate_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_DEALLOC_ONCE); | |
1ec3c026 SR |
1438 | } |
1439 | ||
c8a25900 SR |
1440 | /* |
1441 | * Returns a speed code: Maximum speed to or from this device, | |
1442 | * limited by the device's link speed, the local node's link speed, | |
1443 | * and all PHY port speeds between the two links. | |
1444 | */ | |
6e95dea7 | 1445 | static int ioctl_get_speed(struct client *client, union ioctl_arg *arg) |
33580a3e | 1446 | { |
c8a25900 | 1447 | return client->device->max_speed; |
33580a3e SR |
1448 | } |
1449 | ||
6e95dea7 SR |
1450 | static int ioctl_send_broadcast_request(struct client *client, |
1451 | union ioctl_arg *arg) | |
acfe8333 | 1452 | { |
6e95dea7 | 1453 | struct fw_cdev_send_request *a = &arg->send_request; |
acfe8333 | 1454 | |
6e95dea7 | 1455 | switch (a->tcode) { |
acfe8333 JFSR |
1456 | case TCODE_WRITE_QUADLET_REQUEST: |
1457 | case TCODE_WRITE_BLOCK_REQUEST: | |
1458 | break; | |
1459 | default: | |
1460 | return -EINVAL; | |
1461 | } | |
1462 | ||
1566f3dc | 1463 | /* Security policy: Only allow accesses to Units Space. */ |
6e95dea7 | 1464 | if (a->offset < CSR_REGISTER_BASE + CSR_CONFIG_ROM_END) |
1566f3dc SR |
1465 | return -EACCES; |
1466 | ||
6e95dea7 | 1467 | return init_request(client, a, LOCAL_BUS | 0x3f, SCODE_100); |
acfe8333 JFSR |
1468 | } |
1469 | ||
6e95dea7 | 1470 | static int ioctl_send_stream_packet(struct client *client, union ioctl_arg *arg) |
f8c2287c | 1471 | { |
6e95dea7 | 1472 | struct fw_cdev_send_stream_packet *a = &arg->send_stream_packet; |
18e9b10f SR |
1473 | struct fw_cdev_send_request request; |
1474 | int dest; | |
f8c2287c | 1475 | |
6e95dea7 SR |
1476 | if (a->speed > client->device->card->link_speed || |
1477 | a->length > 1024 << a->speed) | |
18e9b10f | 1478 | return -EIO; |
f8c2287c | 1479 | |
6e95dea7 | 1480 | if (a->tag > 3 || a->channel > 63 || a->sy > 15) |
18e9b10f SR |
1481 | return -EINVAL; |
1482 | ||
6e95dea7 | 1483 | dest = fw_stream_packet_destination_id(a->tag, a->channel, a->sy); |
18e9b10f | 1484 | request.tcode = TCODE_STREAM_DATA; |
6e95dea7 SR |
1485 | request.length = a->length; |
1486 | request.closure = a->closure; | |
1487 | request.data = a->data; | |
1488 | request.generation = a->generation; | |
18e9b10f | 1489 | |
6e95dea7 | 1490 | return init_request(client, &request, dest, a->speed); |
f8c2287c JF |
1491 | } |
1492 | ||
850bb6f2 SR |
1493 | static void outbound_phy_packet_callback(struct fw_packet *packet, |
1494 | struct fw_card *card, int status) | |
1495 | { | |
1496 | struct outbound_phy_packet_event *e = | |
1497 | container_of(packet, struct outbound_phy_packet_event, p); | |
b7c81f80 | 1498 | struct client *e_client; |
850bb6f2 SR |
1499 | |
1500 | switch (status) { | |
1501 | /* expected: */ | |
1502 | case ACK_COMPLETE: e->phy_packet.rcode = RCODE_COMPLETE; break; | |
1503 | /* should never happen with PHY packets: */ | |
1504 | case ACK_PENDING: e->phy_packet.rcode = RCODE_COMPLETE; break; | |
1505 | case ACK_BUSY_X: | |
1506 | case ACK_BUSY_A: | |
1507 | case ACK_BUSY_B: e->phy_packet.rcode = RCODE_BUSY; break; | |
1508 | case ACK_DATA_ERROR: e->phy_packet.rcode = RCODE_DATA_ERROR; break; | |
1509 | case ACK_TYPE_ERROR: e->phy_packet.rcode = RCODE_TYPE_ERROR; break; | |
1510 | /* stale generation; cancelled; on certain controllers: no ack */ | |
1511 | default: e->phy_packet.rcode = status; break; | |
1512 | } | |
cc550216 | 1513 | e->phy_packet.data[0] = packet->timestamp; |
850bb6f2 | 1514 | |
b7c81f80 | 1515 | e_client = e->client; |
cc550216 SR |
1516 | queue_event(e->client, &e->event, &e->phy_packet, |
1517 | sizeof(e->phy_packet) + e->phy_packet.length, NULL, 0); | |
b7c81f80 | 1518 | client_put(e_client); |
850bb6f2 SR |
1519 | } |
1520 | ||
1521 | static int ioctl_send_phy_packet(struct client *client, union ioctl_arg *arg) | |
1522 | { | |
1523 | struct fw_cdev_send_phy_packet *a = &arg->send_phy_packet; | |
1524 | struct fw_card *card = client->device->card; | |
1525 | struct outbound_phy_packet_event *e; | |
1526 | ||
1527 | /* Access policy: Allow this ioctl only on local nodes' device files. */ | |
1528 | if (!client->device->is_local) | |
1529 | return -ENOSYS; | |
1530 | ||
cc550216 | 1531 | e = kzalloc(sizeof(*e) + 4, GFP_KERNEL); |
850bb6f2 SR |
1532 | if (e == NULL) |
1533 | return -ENOMEM; | |
1534 | ||
1535 | client_get(client); | |
1536 | e->client = client; | |
1537 | e->p.speed = SCODE_100; | |
1538 | e->p.generation = a->generation; | |
5b06db16 CL |
1539 | e->p.header[0] = TCODE_LINK_INTERNAL << 4; |
1540 | e->p.header[1] = a->data[0]; | |
1541 | e->p.header[2] = a->data[1]; | |
1542 | e->p.header_length = 12; | |
850bb6f2 SR |
1543 | e->p.callback = outbound_phy_packet_callback; |
1544 | e->phy_packet.closure = a->closure; | |
1545 | e->phy_packet.type = FW_CDEV_EVENT_PHY_PACKET_SENT; | |
cc550216 SR |
1546 | if (is_ping_packet(a->data)) |
1547 | e->phy_packet.length = 4; | |
850bb6f2 SR |
1548 | |
1549 | card->driver->send_request(card, &e->p); | |
1550 | ||
1551 | return 0; | |
1552 | } | |
1553 | ||
bf54e146 SR |
1554 | static int ioctl_receive_phy_packets(struct client *client, union ioctl_arg *arg) |
1555 | { | |
1556 | struct fw_cdev_receive_phy_packets *a = &arg->receive_phy_packets; | |
1557 | struct fw_card *card = client->device->card; | |
1558 | ||
1559 | /* Access policy: Allow this ioctl only on local nodes' device files. */ | |
1560 | if (!client->device->is_local) | |
1561 | return -ENOSYS; | |
1562 | ||
1563 | spin_lock_irq(&card->lock); | |
1564 | ||
1565 | list_move_tail(&client->phy_receiver_link, &card->phy_receiver_list); | |
1566 | client->phy_receiver_closure = a->closure; | |
1567 | ||
1568 | spin_unlock_irq(&card->lock); | |
1569 | ||
1570 | return 0; | |
1571 | } | |
1572 | ||
1573 | void fw_cdev_handle_phy_packet(struct fw_card *card, struct fw_packet *p) | |
1574 | { | |
1575 | struct client *client; | |
1576 | struct inbound_phy_packet_event *e; | |
1577 | unsigned long flags; | |
1578 | ||
1579 | spin_lock_irqsave(&card->lock, flags); | |
1580 | ||
1581 | list_for_each_entry(client, &card->phy_receiver_list, phy_receiver_link) { | |
1582 | e = kmalloc(sizeof(*e) + 8, GFP_ATOMIC); | |
cfb0c9d1 | 1583 | if (e == NULL) |
bf54e146 | 1584 | break; |
cfb0c9d1 | 1585 | |
bf54e146 SR |
1586 | e->phy_packet.closure = client->phy_receiver_closure; |
1587 | e->phy_packet.type = FW_CDEV_EVENT_PHY_PACKET_RECEIVED; | |
1588 | e->phy_packet.rcode = RCODE_COMPLETE; | |
1589 | e->phy_packet.length = 8; | |
1590 | e->phy_packet.data[0] = p->header[1]; | |
1591 | e->phy_packet.data[1] = p->header[2]; | |
1592 | queue_event(client, &e->event, | |
1593 | &e->phy_packet, sizeof(e->phy_packet) + 8, NULL, 0); | |
1594 | } | |
1595 | ||
1596 | spin_unlock_irqrestore(&card->lock, flags); | |
1597 | } | |
1598 | ||
6e95dea7 | 1599 | static int (* const ioctl_handlers[])(struct client *, union ioctl_arg *) = { |
b9dc61cf SR |
1600 | [0x00] = ioctl_get_info, |
1601 | [0x01] = ioctl_send_request, | |
1602 | [0x02] = ioctl_allocate, | |
1603 | [0x03] = ioctl_deallocate, | |
1604 | [0x04] = ioctl_send_response, | |
1605 | [0x05] = ioctl_initiate_bus_reset, | |
1606 | [0x06] = ioctl_add_descriptor, | |
1607 | [0x07] = ioctl_remove_descriptor, | |
1608 | [0x08] = ioctl_create_iso_context, | |
1609 | [0x09] = ioctl_queue_iso, | |
1610 | [0x0a] = ioctl_start_iso, | |
1611 | [0x0b] = ioctl_stop_iso, | |
1612 | [0x0c] = ioctl_get_cycle_timer, | |
1613 | [0x0d] = ioctl_allocate_iso_resource, | |
1614 | [0x0e] = ioctl_deallocate_iso_resource, | |
1615 | [0x0f] = ioctl_allocate_iso_resource_once, | |
1616 | [0x10] = ioctl_deallocate_iso_resource_once, | |
1617 | [0x11] = ioctl_get_speed, | |
1618 | [0x12] = ioctl_send_broadcast_request, | |
1619 | [0x13] = ioctl_send_stream_packet, | |
1620 | [0x14] = ioctl_get_cycle_timer2, | |
850bb6f2 | 1621 | [0x15] = ioctl_send_phy_packet, |
bf54e146 | 1622 | [0x16] = ioctl_receive_phy_packets, |
872e330e | 1623 | [0x17] = ioctl_set_iso_channels, |
d1bbd209 | 1624 | [0x18] = ioctl_flush_iso, |
4f259223 KH |
1625 | }; |
1626 | ||
53dca511 SR |
1627 | static int dispatch_ioctl(struct client *client, |
1628 | unsigned int cmd, void __user *arg) | |
19a15b93 | 1629 | { |
6e95dea7 | 1630 | union ioctl_arg buffer; |
2dbd7d7e | 1631 | int ret; |
4f259223 | 1632 | |
64582298 SR |
1633 | if (fw_device_is_shutdown(client->device)) |
1634 | return -ENODEV; | |
1635 | ||
4f259223 | 1636 | if (_IOC_TYPE(cmd) != '#' || |
9cac00b8 SR |
1637 | _IOC_NR(cmd) >= ARRAY_SIZE(ioctl_handlers) || |
1638 | _IOC_SIZE(cmd) > sizeof(buffer)) | |
d873d794 | 1639 | return -ENOTTY; |
4f259223 | 1640 | |
eaca2d8e | 1641 | memset(&buffer, 0, sizeof(buffer)); |
9cac00b8 SR |
1642 | |
1643 | if (_IOC_DIR(cmd) & _IOC_WRITE) | |
1644 | if (copy_from_user(&buffer, arg, _IOC_SIZE(cmd))) | |
4f259223 | 1645 | return -EFAULT; |
4f259223 | 1646 | |
6e95dea7 | 1647 | ret = ioctl_handlers[_IOC_NR(cmd)](client, &buffer); |
2dbd7d7e SR |
1648 | if (ret < 0) |
1649 | return ret; | |
4f259223 | 1650 | |
9cac00b8 SR |
1651 | if (_IOC_DIR(cmd) & _IOC_READ) |
1652 | if (copy_to_user(arg, &buffer, _IOC_SIZE(cmd))) | |
4f259223 | 1653 | return -EFAULT; |
4f259223 | 1654 | |
2dbd7d7e | 1655 | return ret; |
19a15b93 KH |
1656 | } |
1657 | ||
53dca511 SR |
1658 | static long fw_device_op_ioctl(struct file *file, |
1659 | unsigned int cmd, unsigned long arg) | |
19a15b93 | 1660 | { |
64582298 | 1661 | return dispatch_ioctl(file->private_data, cmd, (void __user *)arg); |
19a15b93 KH |
1662 | } |
1663 | ||
19a15b93 KH |
1664 | static int fw_device_op_mmap(struct file *file, struct vm_area_struct *vma) |
1665 | { | |
1666 | struct client *client = file->private_data; | |
9aad8125 | 1667 | unsigned long size; |
2dbd7d7e | 1668 | int page_count, ret; |
9aad8125 | 1669 | |
551f4cb9 JF |
1670 | if (fw_device_is_shutdown(client->device)) |
1671 | return -ENODEV; | |
1672 | ||
9aad8125 KH |
1673 | /* FIXME: We could support multiple buffers, but we don't. */ |
1674 | if (client->buffer.pages != NULL) | |
1675 | return -EBUSY; | |
1676 | ||
1677 | if (!(vma->vm_flags & VM_SHARED)) | |
1678 | return -EINVAL; | |
19a15b93 | 1679 | |
9aad8125 | 1680 | if (vma->vm_start & ~PAGE_MASK) |
19a15b93 KH |
1681 | return -EINVAL; |
1682 | ||
1683 | client->vm_start = vma->vm_start; | |
9aad8125 KH |
1684 | size = vma->vm_end - vma->vm_start; |
1685 | page_count = size >> PAGE_SHIFT; | |
1686 | if (size & ~PAGE_MASK) | |
1687 | return -EINVAL; | |
1688 | ||
0b6c4857 | 1689 | ret = fw_iso_buffer_alloc(&client->buffer, page_count); |
2dbd7d7e SR |
1690 | if (ret < 0) |
1691 | return ret; | |
19a15b93 | 1692 | |
0b6c4857 SR |
1693 | spin_lock_irq(&client->lock); |
1694 | if (client->iso_context) { | |
1695 | ret = fw_iso_buffer_map_dma(&client->buffer, | |
1696 | client->device->card, | |
1697 | iso_dma_direction(client->iso_context)); | |
1698 | client->buffer_is_mapped = (ret == 0); | |
1699 | } | |
1700 | spin_unlock_irq(&client->lock); | |
2dbd7d7e | 1701 | if (ret < 0) |
0b6c4857 | 1702 | goto fail; |
9aad8125 | 1703 | |
7807759e SR |
1704 | ret = vm_map_pages_zero(vma, client->buffer.pages, |
1705 | client->buffer.page_count); | |
0b6c4857 SR |
1706 | if (ret < 0) |
1707 | goto fail; | |
1708 | ||
1709 | return 0; | |
1710 | fail: | |
1711 | fw_iso_buffer_destroy(&client->buffer, client->device->card); | |
2dbd7d7e | 1712 | return ret; |
19a15b93 KH |
1713 | } |
1714 | ||
5a5e62da CL |
1715 | static int is_outbound_transaction_resource(int id, void *p, void *data) |
1716 | { | |
1717 | struct client_resource *resource = p; | |
1718 | ||
1719 | return resource->release == release_transaction; | |
1720 | } | |
1721 | ||
1722 | static int has_outbound_transactions(struct client *client) | |
1723 | { | |
1724 | int ret; | |
1725 | ||
1726 | spin_lock_irq(&client->lock); | |
1727 | ret = idr_for_each(&client->resource_idr, | |
1728 | is_outbound_transaction_resource, NULL); | |
1729 | spin_unlock_irq(&client->lock); | |
1730 | ||
1731 | return ret; | |
1732 | } | |
1733 | ||
45ee3199 JF |
1734 | static int shutdown_resource(int id, void *p, void *data) |
1735 | { | |
e21fcf79 | 1736 | struct client_resource *resource = p; |
45ee3199 JF |
1737 | struct client *client = data; |
1738 | ||
e21fcf79 | 1739 | resource->release(client, resource); |
fb443036 | 1740 | client_put(client); |
45ee3199 JF |
1741 | |
1742 | return 0; | |
1743 | } | |
1744 | ||
19a15b93 KH |
1745 | static int fw_device_op_release(struct inode *inode, struct file *file) |
1746 | { | |
1747 | struct client *client = file->private_data; | |
e21fcf79 | 1748 | struct event *event, *next_event; |
19a15b93 | 1749 | |
bf54e146 SR |
1750 | spin_lock_irq(&client->device->card->lock); |
1751 | list_del(&client->phy_receiver_link); | |
1752 | spin_unlock_irq(&client->device->card->lock); | |
1753 | ||
97811e34 SR |
1754 | mutex_lock(&client->device->client_list_mutex); |
1755 | list_del(&client->link); | |
1756 | mutex_unlock(&client->device->client_list_mutex); | |
1757 | ||
19a15b93 KH |
1758 | if (client->iso_context) |
1759 | fw_iso_context_destroy(client->iso_context); | |
1760 | ||
36a755cf SR |
1761 | if (client->buffer.pages) |
1762 | fw_iso_buffer_destroy(&client->buffer, client->device->card); | |
1763 | ||
45ee3199 | 1764 | /* Freeze client->resource_idr and client->event_list */ |
3ba94986 | 1765 | spin_lock_irq(&client->lock); |
45ee3199 | 1766 | client->in_shutdown = true; |
3ba94986 | 1767 | spin_unlock_irq(&client->lock); |
66dea3e5 | 1768 | |
5a5e62da CL |
1769 | wait_event(client->tx_flush_wait, !has_outbound_transactions(client)); |
1770 | ||
45ee3199 | 1771 | idr_for_each(&client->resource_idr, shutdown_resource, client); |
45ee3199 | 1772 | idr_destroy(&client->resource_idr); |
28cf6a04 | 1773 | |
e21fcf79 SR |
1774 | list_for_each_entry_safe(event, next_event, &client->event_list, link) |
1775 | kfree(event); | |
19a15b93 | 1776 | |
fb443036 | 1777 | client_put(client); |
19a15b93 KH |
1778 | |
1779 | return 0; | |
1780 | } | |
1781 | ||
afc9a42b | 1782 | static __poll_t fw_device_op_poll(struct file *file, poll_table * pt) |
19a15b93 KH |
1783 | { |
1784 | struct client *client = file->private_data; | |
afc9a42b | 1785 | __poll_t mask = 0; |
19a15b93 KH |
1786 | |
1787 | poll_wait(file, &client->wait, pt); | |
1788 | ||
2603bf21 | 1789 | if (fw_device_is_shutdown(client->device)) |
a9a08845 | 1790 | mask |= EPOLLHUP | EPOLLERR; |
19a15b93 | 1791 | if (!list_empty(&client->event_list)) |
a9a08845 | 1792 | mask |= EPOLLIN | EPOLLRDNORM; |
2603bf21 KH |
1793 | |
1794 | return mask; | |
19a15b93 KH |
1795 | } |
1796 | ||
21ebcd12 | 1797 | const struct file_operations fw_device_ops = { |
19a15b93 | 1798 | .owner = THIS_MODULE, |
3ac26b2e | 1799 | .llseek = no_llseek, |
19a15b93 KH |
1800 | .open = fw_device_op_open, |
1801 | .read = fw_device_op_read, | |
1802 | .unlocked_ioctl = fw_device_op_ioctl, | |
19a15b93 | 1803 | .mmap = fw_device_op_mmap, |
3ac26b2e SR |
1804 | .release = fw_device_op_release, |
1805 | .poll = fw_device_op_poll, | |
407e9ef7 | 1806 | .compat_ioctl = compat_ptr_ioctl, |
19a15b93 | 1807 | }; |