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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> |
be5bbd67 | 13 | #include <linux/errno.h> |
77c9a5da | 14 | #include <linux/firewire.h> |
be5bbd67 SR |
15 | #include <linux/firewire-cdev.h> |
16 | #include <linux/idr.h> | |
4a9bde9b | 17 | #include <linux/irqflags.h> |
b1bda4cd | 18 | #include <linux/jiffies.h> |
19a15b93 | 19 | #include <linux/kernel.h> |
fb443036 | 20 | #include <linux/kref.h> |
be5bbd67 SR |
21 | #include <linux/mm.h> |
22 | #include <linux/module.h> | |
d67cfb96 | 23 | #include <linux/mutex.h> |
19a15b93 | 24 | #include <linux/poll.h> |
ae2a9766 | 25 | #include <linux/sched.h> /* required for linux/wait.h */ |
5a0e3ad6 | 26 | #include <linux/slab.h> |
cf417e54 | 27 | #include <linux/spinlock.h> |
281e2032 | 28 | #include <linux/string.h> |
be5bbd67 | 29 | #include <linux/time.h> |
e034d242 | 30 | #include <linux/uaccess.h> |
be5bbd67 SR |
31 | #include <linux/vmalloc.h> |
32 | #include <linux/wait.h> | |
b1bda4cd | 33 | #include <linux/workqueue.h> |
be5bbd67 | 34 | |
be5bbd67 | 35 | |
77c9a5da | 36 | #include "core.h" |
19a15b93 | 37 | |
604f4516 SR |
38 | /* |
39 | * ABI version history is documented in linux/firewire-cdev.h. | |
40 | */ | |
18d62711 | 41 | #define FW_CDEV_KERNEL_VERSION 5 |
8e2b2b46 SR |
42 | #define FW_CDEV_VERSION_EVENT_REQUEST2 4 |
43 | #define FW_CDEV_VERSION_ALLOCATE_REGION_END 4 | |
0699a73a | 44 | #define FW_CDEV_VERSION_AUTO_FLUSH_ISO_OVERFLOW 5 |
604f4516 | 45 | |
19a15b93 | 46 | struct client { |
344bbc4d | 47 | u32 version; |
19a15b93 | 48 | struct fw_device *device; |
45ee3199 | 49 | |
19a15b93 | 50 | spinlock_t lock; |
45ee3199 JF |
51 | bool in_shutdown; |
52 | struct idr resource_idr; | |
19a15b93 | 53 | struct list_head event_list; |
19a15b93 | 54 | wait_queue_head_t wait; |
5a5e62da | 55 | wait_queue_head_t tx_flush_wait; |
da8ecffa | 56 | u64 bus_reset_closure; |
9aad8125 | 57 | |
19a15b93 | 58 | struct fw_iso_context *iso_context; |
abaa5743 | 59 | u64 iso_closure; |
9aad8125 KH |
60 | struct fw_iso_buffer buffer; |
61 | unsigned long vm_start; | |
0b6c4857 | 62 | bool buffer_is_mapped; |
97bd9efa | 63 | |
bf54e146 SR |
64 | struct list_head phy_receiver_link; |
65 | u64 phy_receiver_closure; | |
66 | ||
97bd9efa | 67 | struct list_head link; |
fb443036 | 68 | struct kref kref; |
19a15b93 KH |
69 | }; |
70 | ||
fb443036 SR |
71 | static inline void client_get(struct client *client) |
72 | { | |
73 | kref_get(&client->kref); | |
74 | } | |
75 | ||
76 | static void client_release(struct kref *kref) | |
77 | { | |
78 | struct client *client = container_of(kref, struct client, kref); | |
79 | ||
80 | fw_device_put(client->device); | |
81 | kfree(client); | |
82 | } | |
83 | ||
84 | static void client_put(struct client *client) | |
85 | { | |
86 | kref_put(&client->kref, client_release); | |
87 | } | |
88 | ||
97c18b7f SR |
89 | struct client_resource; |
90 | typedef void (*client_resource_release_fn_t)(struct client *, | |
91 | struct client_resource *); | |
92 | struct client_resource { | |
93 | client_resource_release_fn_t release; | |
94 | int handle; | |
95 | }; | |
96 | ||
97 | struct address_handler_resource { | |
98 | struct client_resource resource; | |
99 | struct fw_address_handler handler; | |
100 | __u64 closure; | |
101 | struct client *client; | |
102 | }; | |
103 | ||
104 | struct outbound_transaction_resource { | |
105 | struct client_resource resource; | |
106 | struct fw_transaction transaction; | |
107 | }; | |
108 | ||
109 | struct inbound_transaction_resource { | |
110 | struct client_resource resource; | |
08bd34c9 | 111 | struct fw_card *card; |
97c18b7f SR |
112 | struct fw_request *request; |
113 | void *data; | |
114 | size_t length; | |
115 | }; | |
116 | ||
117 | struct descriptor_resource { | |
118 | struct client_resource resource; | |
119 | struct fw_descriptor descriptor; | |
120 | u32 data[0]; | |
121 | }; | |
122 | ||
b1bda4cd JFSR |
123 | struct iso_resource { |
124 | struct client_resource resource; | |
125 | struct client *client; | |
126 | /* Schedule work and access todo only with client->lock held. */ | |
127 | struct delayed_work work; | |
1ec3c026 SR |
128 | enum {ISO_RES_ALLOC, ISO_RES_REALLOC, ISO_RES_DEALLOC, |
129 | ISO_RES_ALLOC_ONCE, ISO_RES_DEALLOC_ONCE,} todo; | |
b1bda4cd JFSR |
130 | int generation; |
131 | u64 channels; | |
132 | s32 bandwidth; | |
133 | struct iso_resource_event *e_alloc, *e_dealloc; | |
134 | }; | |
135 | ||
b1bda4cd JFSR |
136 | static void release_iso_resource(struct client *, struct client_resource *); |
137 | ||
9fb551bf SR |
138 | static void schedule_iso_resource(struct iso_resource *r, unsigned long delay) |
139 | { | |
140 | client_get(r->client); | |
105e53f8 | 141 | if (!queue_delayed_work(fw_workqueue, &r->work, delay)) |
9fb551bf SR |
142 | client_put(r->client); |
143 | } | |
144 | ||
145 | static void schedule_if_iso_resource(struct client_resource *resource) | |
146 | { | |
147 | if (resource->release == release_iso_resource) | |
148 | schedule_iso_resource(container_of(resource, | |
149 | struct iso_resource, resource), 0); | |
150 | } | |
151 | ||
97c18b7f SR |
152 | /* |
153 | * dequeue_event() just kfree()'s the event, so the event has to be | |
154 | * the first field in a struct XYZ_event. | |
155 | */ | |
156 | struct event { | |
157 | struct { void *data; size_t size; } v[2]; | |
158 | struct list_head link; | |
159 | }; | |
160 | ||
161 | struct bus_reset_event { | |
162 | struct event event; | |
163 | struct fw_cdev_event_bus_reset reset; | |
164 | }; | |
165 | ||
166 | struct outbound_transaction_event { | |
167 | struct event event; | |
168 | struct client *client; | |
169 | struct outbound_transaction_resource r; | |
170 | struct fw_cdev_event_response response; | |
171 | }; | |
172 | ||
173 | struct inbound_transaction_event { | |
174 | struct event event; | |
e205597d SR |
175 | union { |
176 | struct fw_cdev_event_request request; | |
177 | struct fw_cdev_event_request2 request2; | |
178 | } req; | |
97c18b7f SR |
179 | }; |
180 | ||
181 | struct iso_interrupt_event { | |
182 | struct event event; | |
183 | struct fw_cdev_event_iso_interrupt interrupt; | |
184 | }; | |
185 | ||
872e330e SR |
186 | struct iso_interrupt_mc_event { |
187 | struct event event; | |
188 | struct fw_cdev_event_iso_interrupt_mc interrupt; | |
189 | }; | |
190 | ||
b1bda4cd JFSR |
191 | struct iso_resource_event { |
192 | struct event event; | |
e21fcf79 | 193 | struct fw_cdev_event_iso_resource iso_resource; |
b1bda4cd JFSR |
194 | }; |
195 | ||
850bb6f2 SR |
196 | struct outbound_phy_packet_event { |
197 | struct event event; | |
198 | struct client *client; | |
199 | struct fw_packet p; | |
200 | struct fw_cdev_event_phy_packet phy_packet; | |
201 | }; | |
202 | ||
bf54e146 SR |
203 | struct inbound_phy_packet_event { |
204 | struct event event; | |
205 | struct fw_cdev_event_phy_packet phy_packet; | |
206 | }; | |
207 | ||
9c1176b6 SR |
208 | #ifdef CONFIG_COMPAT |
209 | static void __user *u64_to_uptr(u64 value) | |
210 | { | |
a25045ff | 211 | if (in_compat_syscall()) |
9c1176b6 SR |
212 | return compat_ptr(value); |
213 | else | |
214 | return (void __user *)(unsigned long)value; | |
215 | } | |
216 | ||
217 | static u64 uptr_to_u64(void __user *ptr) | |
218 | { | |
a25045ff | 219 | if (in_compat_syscall()) |
9c1176b6 SR |
220 | return ptr_to_compat(ptr); |
221 | else | |
222 | return (u64)(unsigned long)ptr; | |
223 | } | |
224 | #else | |
225 | static inline void __user *u64_to_uptr(u64 value) | |
19a15b93 KH |
226 | { |
227 | return (void __user *)(unsigned long)value; | |
228 | } | |
229 | ||
9c1176b6 | 230 | static inline u64 uptr_to_u64(void __user *ptr) |
19a15b93 | 231 | { |
9c1176b6 | 232 | return (u64)(unsigned long)ptr; |
19a15b93 | 233 | } |
9c1176b6 | 234 | #endif /* CONFIG_COMPAT */ |
19a15b93 KH |
235 | |
236 | static int fw_device_op_open(struct inode *inode, struct file *file) | |
237 | { | |
238 | struct fw_device *device; | |
239 | struct client *client; | |
240 | ||
96b19062 | 241 | device = fw_device_get_by_devt(inode->i_rdev); |
a3aca3da KH |
242 | if (device == NULL) |
243 | return -ENODEV; | |
19a15b93 | 244 | |
551f4cb9 JF |
245 | if (fw_device_is_shutdown(device)) { |
246 | fw_device_put(device); | |
247 | return -ENODEV; | |
248 | } | |
249 | ||
2d826cc5 | 250 | client = kzalloc(sizeof(*client), GFP_KERNEL); |
96b19062 SR |
251 | if (client == NULL) { |
252 | fw_device_put(device); | |
19a15b93 | 253 | return -ENOMEM; |
96b19062 | 254 | } |
19a15b93 | 255 | |
96b19062 | 256 | client->device = device; |
19a15b93 | 257 | spin_lock_init(&client->lock); |
45ee3199 JF |
258 | idr_init(&client->resource_idr); |
259 | INIT_LIST_HEAD(&client->event_list); | |
19a15b93 | 260 | init_waitqueue_head(&client->wait); |
5a5e62da | 261 | init_waitqueue_head(&client->tx_flush_wait); |
bf54e146 | 262 | INIT_LIST_HEAD(&client->phy_receiver_link); |
93b37905 | 263 | INIT_LIST_HEAD(&client->link); |
fb443036 | 264 | kref_init(&client->kref); |
19a15b93 KH |
265 | |
266 | file->private_data = client; | |
267 | ||
3ac26b2e | 268 | return nonseekable_open(inode, file); |
19a15b93 KH |
269 | } |
270 | ||
271 | static void queue_event(struct client *client, struct event *event, | |
272 | void *data0, size_t size0, void *data1, size_t size1) | |
273 | { | |
274 | unsigned long flags; | |
275 | ||
276 | event->v[0].data = data0; | |
277 | event->v[0].size = size0; | |
278 | event->v[1].data = data1; | |
279 | event->v[1].size = size1; | |
280 | ||
281 | spin_lock_irqsave(&client->lock, flags); | |
45ee3199 JF |
282 | if (client->in_shutdown) |
283 | kfree(event); | |
284 | else | |
285 | list_add_tail(&event->link, &client->event_list); | |
19a15b93 | 286 | spin_unlock_irqrestore(&client->lock, flags); |
83431cba JF |
287 | |
288 | wake_up_interruptible(&client->wait); | |
19a15b93 KH |
289 | } |
290 | ||
53dca511 SR |
291 | static int dequeue_event(struct client *client, |
292 | char __user *buffer, size_t count) | |
19a15b93 | 293 | { |
19a15b93 KH |
294 | struct event *event; |
295 | size_t size, total; | |
2dbd7d7e | 296 | int i, ret; |
19a15b93 | 297 | |
2dbd7d7e SR |
298 | ret = wait_event_interruptible(client->wait, |
299 | !list_empty(&client->event_list) || | |
300 | fw_device_is_shutdown(client->device)); | |
301 | if (ret < 0) | |
302 | return ret; | |
19a15b93 | 303 | |
2603bf21 KH |
304 | if (list_empty(&client->event_list) && |
305 | fw_device_is_shutdown(client->device)) | |
306 | return -ENODEV; | |
19a15b93 | 307 | |
3ba94986 | 308 | spin_lock_irq(&client->lock); |
a459b8ab | 309 | event = list_first_entry(&client->event_list, struct event, link); |
19a15b93 | 310 | list_del(&event->link); |
3ba94986 | 311 | spin_unlock_irq(&client->lock); |
19a15b93 | 312 | |
19a15b93 KH |
313 | total = 0; |
314 | for (i = 0; i < ARRAY_SIZE(event->v) && total < count; i++) { | |
315 | size = min(event->v[i].size, count - total); | |
2603bf21 | 316 | if (copy_to_user(buffer + total, event->v[i].data, size)) { |
2dbd7d7e | 317 | ret = -EFAULT; |
19a15b93 | 318 | goto out; |
2603bf21 | 319 | } |
19a15b93 KH |
320 | total += size; |
321 | } | |
2dbd7d7e | 322 | ret = total; |
19a15b93 KH |
323 | |
324 | out: | |
325 | kfree(event); | |
326 | ||
2dbd7d7e | 327 | return ret; |
19a15b93 KH |
328 | } |
329 | ||
53dca511 SR |
330 | static ssize_t fw_device_op_read(struct file *file, char __user *buffer, |
331 | size_t count, loff_t *offset) | |
19a15b93 KH |
332 | { |
333 | struct client *client = file->private_data; | |
334 | ||
335 | return dequeue_event(client, buffer, count); | |
336 | } | |
337 | ||
53dca511 SR |
338 | static void fill_bus_reset_event(struct fw_cdev_event_bus_reset *event, |
339 | struct client *client) | |
344bbc4d | 340 | { |
da8ecffa | 341 | struct fw_card *card = client->device->card; |
cf417e54 | 342 | |
3ba94986 | 343 | spin_lock_irq(&card->lock); |
344bbc4d | 344 | |
da8ecffa | 345 | event->closure = client->bus_reset_closure; |
344bbc4d | 346 | event->type = FW_CDEV_EVENT_BUS_RESET; |
cf5a56ac | 347 | event->generation = client->device->generation; |
da8ecffa | 348 | event->node_id = client->device->node_id; |
344bbc4d | 349 | event->local_node_id = card->local_node->node_id; |
250b2b6d | 350 | event->bm_node_id = card->bm_node_id; |
344bbc4d KH |
351 | event->irm_node_id = card->irm_node->node_id; |
352 | event->root_node_id = card->root_node->node_id; | |
cf417e54 | 353 | |
3ba94986 | 354 | spin_unlock_irq(&card->lock); |
344bbc4d KH |
355 | } |
356 | ||
53dca511 SR |
357 | static void for_each_client(struct fw_device *device, |
358 | void (*callback)(struct client *client)) | |
2603bf21 | 359 | { |
2603bf21 | 360 | struct client *c; |
2603bf21 | 361 | |
d67cfb96 | 362 | mutex_lock(&device->client_list_mutex); |
2603bf21 KH |
363 | list_for_each_entry(c, &device->client_list, link) |
364 | callback(c); | |
d67cfb96 | 365 | mutex_unlock(&device->client_list_mutex); |
2603bf21 KH |
366 | } |
367 | ||
b1bda4cd JFSR |
368 | static int schedule_reallocations(int id, void *p, void *data) |
369 | { | |
9fb551bf | 370 | schedule_if_iso_resource(p); |
b1bda4cd | 371 | |
b1bda4cd JFSR |
372 | return 0; |
373 | } | |
374 | ||
53dca511 | 375 | static void queue_bus_reset_event(struct client *client) |
97bd9efa | 376 | { |
97c18b7f | 377 | struct bus_reset_event *e; |
97bd9efa | 378 | |
97c18b7f | 379 | e = kzalloc(sizeof(*e), GFP_KERNEL); |
cfb0c9d1 | 380 | if (e == NULL) |
97bd9efa | 381 | return; |
97bd9efa | 382 | |
97c18b7f | 383 | fill_bus_reset_event(&e->reset, client); |
97bd9efa | 384 | |
97c18b7f SR |
385 | queue_event(client, &e->event, |
386 | &e->reset, sizeof(e->reset), NULL, 0); | |
b1bda4cd JFSR |
387 | |
388 | spin_lock_irq(&client->lock); | |
389 | idr_for_each(&client->resource_idr, schedule_reallocations, client); | |
390 | spin_unlock_irq(&client->lock); | |
97bd9efa KH |
391 | } |
392 | ||
393 | void fw_device_cdev_update(struct fw_device *device) | |
394 | { | |
2603bf21 KH |
395 | for_each_client(device, queue_bus_reset_event); |
396 | } | |
97bd9efa | 397 | |
2603bf21 KH |
398 | static void wake_up_client(struct client *client) |
399 | { | |
400 | wake_up_interruptible(&client->wait); | |
401 | } | |
97bd9efa | 402 | |
2603bf21 KH |
403 | void fw_device_cdev_remove(struct fw_device *device) |
404 | { | |
405 | for_each_client(device, wake_up_client); | |
97bd9efa KH |
406 | } |
407 | ||
6e95dea7 SR |
408 | union ioctl_arg { |
409 | struct fw_cdev_get_info get_info; | |
410 | struct fw_cdev_send_request send_request; | |
411 | struct fw_cdev_allocate allocate; | |
412 | struct fw_cdev_deallocate deallocate; | |
413 | struct fw_cdev_send_response send_response; | |
414 | struct fw_cdev_initiate_bus_reset initiate_bus_reset; | |
415 | struct fw_cdev_add_descriptor add_descriptor; | |
416 | struct fw_cdev_remove_descriptor remove_descriptor; | |
417 | struct fw_cdev_create_iso_context create_iso_context; | |
418 | struct fw_cdev_queue_iso queue_iso; | |
419 | struct fw_cdev_start_iso start_iso; | |
420 | struct fw_cdev_stop_iso stop_iso; | |
421 | struct fw_cdev_get_cycle_timer get_cycle_timer; | |
422 | struct fw_cdev_allocate_iso_resource allocate_iso_resource; | |
423 | struct fw_cdev_send_stream_packet send_stream_packet; | |
424 | struct fw_cdev_get_cycle_timer2 get_cycle_timer2; | |
850bb6f2 | 425 | struct fw_cdev_send_phy_packet send_phy_packet; |
bf54e146 | 426 | struct fw_cdev_receive_phy_packets receive_phy_packets; |
872e330e | 427 | struct fw_cdev_set_iso_channels set_iso_channels; |
d1bbd209 | 428 | struct fw_cdev_flush_iso flush_iso; |
6e95dea7 SR |
429 | }; |
430 | ||
431 | static int ioctl_get_info(struct client *client, union ioctl_arg *arg) | |
19a15b93 | 432 | { |
6e95dea7 | 433 | struct fw_cdev_get_info *a = &arg->get_info; |
344bbc4d | 434 | struct fw_cdev_event_bus_reset bus_reset; |
c9755e14 | 435 | unsigned long ret = 0; |
344bbc4d | 436 | |
6e95dea7 | 437 | client->version = a->version; |
604f4516 | 438 | a->version = FW_CDEV_KERNEL_VERSION; |
6e95dea7 | 439 | a->card = client->device->card->index; |
344bbc4d | 440 | |
c9755e14 SR |
441 | down_read(&fw_device_rwsem); |
442 | ||
6e95dea7 SR |
443 | if (a->rom != 0) { |
444 | size_t want = a->rom_length; | |
d84702a5 | 445 | size_t have = client->device->config_rom_length * 4; |
344bbc4d | 446 | |
6e95dea7 SR |
447 | ret = copy_to_user(u64_to_uptr(a->rom), |
448 | client->device->config_rom, min(want, have)); | |
344bbc4d | 449 | } |
6e95dea7 | 450 | a->rom_length = client->device->config_rom_length * 4; |
344bbc4d | 451 | |
c9755e14 SR |
452 | up_read(&fw_device_rwsem); |
453 | ||
454 | if (ret != 0) | |
455 | return -EFAULT; | |
456 | ||
93b37905 SR |
457 | mutex_lock(&client->device->client_list_mutex); |
458 | ||
6e95dea7 SR |
459 | client->bus_reset_closure = a->bus_reset_closure; |
460 | if (a->bus_reset != 0) { | |
da8ecffa | 461 | fill_bus_reset_event(&bus_reset, client); |
790198f7 SR |
462 | /* unaligned size of bus_reset is 36 bytes */ |
463 | ret = copy_to_user(u64_to_uptr(a->bus_reset), &bus_reset, 36); | |
344bbc4d | 464 | } |
93b37905 SR |
465 | if (ret == 0 && list_empty(&client->link)) |
466 | list_add_tail(&client->link, &client->device->client_list); | |
19a15b93 | 467 | |
93b37905 SR |
468 | mutex_unlock(&client->device->client_list_mutex); |
469 | ||
470 | return ret ? -EFAULT : 0; | |
19a15b93 KH |
471 | } |
472 | ||
53dca511 SR |
473 | static int add_client_resource(struct client *client, |
474 | struct client_resource *resource, gfp_t gfp_mask) | |
3964a449 | 475 | { |
d0164adc | 476 | bool preload = gfpflags_allow_blocking(gfp_mask); |
3964a449 | 477 | unsigned long flags; |
45ee3199 JF |
478 | int ret; |
479 | ||
37b61890 TH |
480 | if (preload) |
481 | idr_preload(gfp_mask); | |
3964a449 | 482 | spin_lock_irqsave(&client->lock, flags); |
37b61890 | 483 | |
45ee3199 JF |
484 | if (client->in_shutdown) |
485 | ret = -ECANCELED; | |
486 | else | |
37b61890 TH |
487 | ret = idr_alloc(&client->resource_idr, resource, 0, 0, |
488 | GFP_NOWAIT); | |
b1bda4cd | 489 | if (ret >= 0) { |
37b61890 | 490 | resource->handle = ret; |
fb443036 | 491 | client_get(client); |
9fb551bf | 492 | schedule_if_iso_resource(resource); |
b1bda4cd | 493 | } |
45ee3199 | 494 | |
37b61890 TH |
495 | spin_unlock_irqrestore(&client->lock, flags); |
496 | if (preload) | |
497 | idr_preload_end(); | |
45ee3199 JF |
498 | |
499 | return ret < 0 ? ret : 0; | |
3964a449 KH |
500 | } |
501 | ||
53dca511 SR |
502 | static int release_client_resource(struct client *client, u32 handle, |
503 | client_resource_release_fn_t release, | |
e21fcf79 | 504 | struct client_resource **return_resource) |
3964a449 | 505 | { |
e21fcf79 | 506 | struct client_resource *resource; |
3964a449 | 507 | |
3ba94986 | 508 | spin_lock_irq(&client->lock); |
45ee3199 | 509 | if (client->in_shutdown) |
e21fcf79 | 510 | resource = NULL; |
45ee3199 | 511 | else |
e21fcf79 SR |
512 | resource = idr_find(&client->resource_idr, handle); |
513 | if (resource && resource->release == release) | |
45ee3199 | 514 | idr_remove(&client->resource_idr, handle); |
3ba94986 | 515 | spin_unlock_irq(&client->lock); |
3964a449 | 516 | |
e21fcf79 | 517 | if (!(resource && resource->release == release)) |
3964a449 KH |
518 | return -EINVAL; |
519 | ||
e21fcf79 SR |
520 | if (return_resource) |
521 | *return_resource = resource; | |
3964a449 | 522 | else |
e21fcf79 | 523 | resource->release(client, resource); |
3964a449 | 524 | |
fb443036 SR |
525 | client_put(client); |
526 | ||
3964a449 KH |
527 | return 0; |
528 | } | |
529 | ||
53dca511 SR |
530 | static void release_transaction(struct client *client, |
531 | struct client_resource *resource) | |
3964a449 | 532 | { |
3964a449 KH |
533 | } |
534 | ||
53dca511 SR |
535 | static void complete_transaction(struct fw_card *card, int rcode, |
536 | void *payload, size_t length, void *data) | |
19a15b93 | 537 | { |
97c18b7f SR |
538 | struct outbound_transaction_event *e = data; |
539 | struct fw_cdev_event_response *rsp = &e->response; | |
540 | struct client *client = e->client; | |
28cf6a04 | 541 | unsigned long flags; |
19a15b93 | 542 | |
97c18b7f SR |
543 | if (length < rsp->length) |
544 | rsp->length = length; | |
19a15b93 | 545 | if (rcode == RCODE_COMPLETE) |
97c18b7f | 546 | memcpy(rsp->data, payload, rsp->length); |
19a15b93 | 547 | |
28cf6a04 | 548 | spin_lock_irqsave(&client->lock, flags); |
5a5e62da CL |
549 | idr_remove(&client->resource_idr, e->r.resource.handle); |
550 | if (client->in_shutdown) | |
551 | wake_up(&client->tx_flush_wait); | |
28cf6a04 KH |
552 | spin_unlock_irqrestore(&client->lock, flags); |
553 | ||
97c18b7f SR |
554 | rsp->type = FW_CDEV_EVENT_RESPONSE; |
555 | rsp->rcode = rcode; | |
8401d92b DM |
556 | |
557 | /* | |
97c18b7f | 558 | * In the case that sizeof(*rsp) doesn't align with the position of the |
8401d92b DM |
559 | * data, and the read is short, preserve an extra copy of the data |
560 | * to stay compatible with a pre-2.6.27 bug. Since the bug is harmless | |
561 | * for short reads and some apps depended on it, this is both safe | |
562 | * and prudent for compatibility. | |
563 | */ | |
97c18b7f SR |
564 | if (rsp->length <= sizeof(*rsp) - offsetof(typeof(*rsp), data)) |
565 | queue_event(client, &e->event, rsp, sizeof(*rsp), | |
566 | rsp->data, rsp->length); | |
8401d92b | 567 | else |
97c18b7f | 568 | queue_event(client, &e->event, rsp, sizeof(*rsp) + rsp->length, |
8401d92b | 569 | NULL, 0); |
fb443036 | 570 | |
5a5e62da CL |
571 | /* Drop the idr's reference */ |
572 | client_put(client); | |
19a15b93 KH |
573 | } |
574 | ||
acfe8333 JFSR |
575 | static int init_request(struct client *client, |
576 | struct fw_cdev_send_request *request, | |
577 | int destination_id, int speed) | |
19a15b93 | 578 | { |
97c18b7f | 579 | struct outbound_transaction_event *e; |
1f3125af | 580 | int ret; |
19a15b93 | 581 | |
18e9b10f SR |
582 | if (request->tcode != TCODE_STREAM_DATA && |
583 | (request->length > 4096 || request->length > 512 << speed)) | |
5d3fd692 | 584 | return -EIO; |
19a15b93 | 585 | |
a8e93f3d CL |
586 | if (request->tcode == TCODE_WRITE_QUADLET_REQUEST && |
587 | request->length < 4) | |
588 | return -EINVAL; | |
589 | ||
97c18b7f SR |
590 | e = kmalloc(sizeof(*e) + request->length, GFP_KERNEL); |
591 | if (e == NULL) | |
19a15b93 KH |
592 | return -ENOMEM; |
593 | ||
97c18b7f SR |
594 | e->client = client; |
595 | e->response.length = request->length; | |
596 | e->response.closure = request->closure; | |
19a15b93 | 597 | |
4f259223 | 598 | if (request->data && |
97c18b7f | 599 | copy_from_user(e->response.data, |
4f259223 | 600 | u64_to_uptr(request->data), request->length)) { |
1f3125af | 601 | ret = -EFAULT; |
45ee3199 | 602 | goto failed; |
1f3125af SR |
603 | } |
604 | ||
97c18b7f SR |
605 | e->r.resource.release = release_transaction; |
606 | ret = add_client_resource(client, &e->r.resource, GFP_KERNEL); | |
45ee3199 JF |
607 | if (ret < 0) |
608 | goto failed; | |
28cf6a04 | 609 | |
acfe8333 | 610 | fw_send_request(client->device->card, &e->r.transaction, |
664d8010 SR |
611 | request->tcode, destination_id, request->generation, |
612 | speed, request->offset, e->response.data, | |
613 | request->length, complete_transaction, e); | |
614 | return 0; | |
19a15b93 | 615 | |
45ee3199 | 616 | failed: |
97c18b7f | 617 | kfree(e); |
1f3125af SR |
618 | |
619 | return ret; | |
19a15b93 KH |
620 | } |
621 | ||
6e95dea7 | 622 | static int ioctl_send_request(struct client *client, union ioctl_arg *arg) |
acfe8333 | 623 | { |
6e95dea7 | 624 | switch (arg->send_request.tcode) { |
acfe8333 JFSR |
625 | case TCODE_WRITE_QUADLET_REQUEST: |
626 | case TCODE_WRITE_BLOCK_REQUEST: | |
627 | case TCODE_READ_QUADLET_REQUEST: | |
628 | case TCODE_READ_BLOCK_REQUEST: | |
629 | case TCODE_LOCK_MASK_SWAP: | |
630 | case TCODE_LOCK_COMPARE_SWAP: | |
631 | case TCODE_LOCK_FETCH_ADD: | |
632 | case TCODE_LOCK_LITTLE_ADD: | |
633 | case TCODE_LOCK_BOUNDED_ADD: | |
634 | case TCODE_LOCK_WRAP_ADD: | |
635 | case TCODE_LOCK_VENDOR_DEPENDENT: | |
636 | break; | |
637 | default: | |
638 | return -EINVAL; | |
639 | } | |
640 | ||
6e95dea7 | 641 | return init_request(client, &arg->send_request, client->device->node_id, |
acfe8333 JFSR |
642 | client->device->max_speed); |
643 | } | |
644 | ||
281e2032 SR |
645 | static inline bool is_fcp_request(struct fw_request *request) |
646 | { | |
647 | return request == NULL; | |
648 | } | |
649 | ||
53dca511 SR |
650 | static void release_request(struct client *client, |
651 | struct client_resource *resource) | |
3964a449 | 652 | { |
97c18b7f SR |
653 | struct inbound_transaction_resource *r = container_of(resource, |
654 | struct inbound_transaction_resource, resource); | |
3964a449 | 655 | |
281e2032 SR |
656 | if (is_fcp_request(r->request)) |
657 | kfree(r->data); | |
658 | else | |
08bd34c9 | 659 | fw_send_response(r->card, r->request, RCODE_CONFLICT_ERROR); |
0244f573 SR |
660 | |
661 | fw_card_put(r->card); | |
97c18b7f | 662 | kfree(r); |
3964a449 KH |
663 | } |
664 | ||
97c18b7f | 665 | static void handle_request(struct fw_card *card, struct fw_request *request, |
53dca511 | 666 | int tcode, int destination, int source, |
33e553fe | 667 | int generation, unsigned long long offset, |
53dca511 | 668 | void *payload, size_t length, void *callback_data) |
19a15b93 | 669 | { |
97c18b7f SR |
670 | struct address_handler_resource *handler = callback_data; |
671 | struct inbound_transaction_resource *r; | |
672 | struct inbound_transaction_event *e; | |
e205597d | 673 | size_t event_size0; |
281e2032 | 674 | void *fcp_frame = NULL; |
45ee3199 | 675 | int ret; |
19a15b93 | 676 | |
0244f573 SR |
677 | /* card may be different from handler->client->device->card */ |
678 | fw_card_get(card); | |
679 | ||
97c18b7f | 680 | r = kmalloc(sizeof(*r), GFP_ATOMIC); |
2d826cc5 | 681 | e = kmalloc(sizeof(*e), GFP_ATOMIC); |
cfb0c9d1 | 682 | if (r == NULL || e == NULL) |
45ee3199 | 683 | goto failed; |
cfb0c9d1 | 684 | |
08bd34c9 | 685 | r->card = card; |
97c18b7f SR |
686 | r->request = request; |
687 | r->data = payload; | |
688 | r->length = length; | |
19a15b93 | 689 | |
281e2032 SR |
690 | if (is_fcp_request(request)) { |
691 | /* | |
692 | * FIXME: Let core-transaction.c manage a | |
693 | * single reference-counted copy? | |
694 | */ | |
695 | fcp_frame = kmemdup(payload, length, GFP_ATOMIC); | |
696 | if (fcp_frame == NULL) | |
697 | goto failed; | |
698 | ||
699 | r->data = fcp_frame; | |
700 | } | |
701 | ||
97c18b7f SR |
702 | r->resource.release = release_request; |
703 | ret = add_client_resource(handler->client, &r->resource, GFP_ATOMIC); | |
45ee3199 JF |
704 | if (ret < 0) |
705 | goto failed; | |
19a15b93 | 706 | |
e205597d SR |
707 | if (handler->client->version < FW_CDEV_VERSION_EVENT_REQUEST2) { |
708 | struct fw_cdev_event_request *req = &e->req.request; | |
709 | ||
710 | if (tcode & 0x10) | |
711 | tcode = TCODE_LOCK_REQUEST; | |
712 | ||
713 | req->type = FW_CDEV_EVENT_REQUEST; | |
714 | req->tcode = tcode; | |
715 | req->offset = offset; | |
716 | req->length = length; | |
717 | req->handle = r->resource.handle; | |
718 | req->closure = handler->closure; | |
719 | event_size0 = sizeof(*req); | |
720 | } else { | |
721 | struct fw_cdev_event_request2 *req = &e->req.request2; | |
722 | ||
723 | req->type = FW_CDEV_EVENT_REQUEST2; | |
724 | req->tcode = tcode; | |
725 | req->offset = offset; | |
726 | req->source_node_id = source; | |
727 | req->destination_node_id = destination; | |
728 | req->card = card->index; | |
729 | req->generation = generation; | |
730 | req->length = length; | |
731 | req->handle = r->resource.handle; | |
732 | req->closure = handler->closure; | |
733 | event_size0 = sizeof(*req); | |
734 | } | |
19a15b93 | 735 | |
97c18b7f | 736 | queue_event(handler->client, &e->event, |
e205597d | 737 | &e->req, event_size0, r->data, length); |
45ee3199 JF |
738 | return; |
739 | ||
740 | failed: | |
97c18b7f | 741 | kfree(r); |
45ee3199 | 742 | kfree(e); |
281e2032 SR |
743 | kfree(fcp_frame); |
744 | ||
745 | if (!is_fcp_request(request)) | |
db5d247a | 746 | fw_send_response(card, request, RCODE_CONFLICT_ERROR); |
0244f573 SR |
747 | |
748 | fw_card_put(card); | |
19a15b93 KH |
749 | } |
750 | ||
53dca511 SR |
751 | static void release_address_handler(struct client *client, |
752 | struct client_resource *resource) | |
3964a449 | 753 | { |
97c18b7f SR |
754 | struct address_handler_resource *r = |
755 | container_of(resource, struct address_handler_resource, resource); | |
3964a449 | 756 | |
97c18b7f SR |
757 | fw_core_remove_address_handler(&r->handler); |
758 | kfree(r); | |
3964a449 KH |
759 | } |
760 | ||
6e95dea7 | 761 | static int ioctl_allocate(struct client *client, union ioctl_arg *arg) |
19a15b93 | 762 | { |
6e95dea7 | 763 | struct fw_cdev_allocate *a = &arg->allocate; |
97c18b7f | 764 | struct address_handler_resource *r; |
19a15b93 | 765 | struct fw_address_region region; |
45ee3199 | 766 | int ret; |
19a15b93 | 767 | |
97c18b7f SR |
768 | r = kmalloc(sizeof(*r), GFP_KERNEL); |
769 | if (r == NULL) | |
19a15b93 KH |
770 | return -ENOMEM; |
771 | ||
6e95dea7 | 772 | region.start = a->offset; |
8e2b2b46 SR |
773 | if (client->version < FW_CDEV_VERSION_ALLOCATE_REGION_END) |
774 | region.end = a->offset + a->length; | |
775 | else | |
776 | region.end = a->region_end; | |
777 | ||
6e95dea7 | 778 | r->handler.length = a->length; |
97c18b7f | 779 | r->handler.address_callback = handle_request; |
6e95dea7 SR |
780 | r->handler.callback_data = r; |
781 | r->closure = a->closure; | |
782 | r->client = client; | |
19a15b93 | 783 | |
97c18b7f | 784 | ret = fw_core_add_address_handler(&r->handler, ®ion); |
3e0b5f0d | 785 | if (ret < 0) { |
97c18b7f | 786 | kfree(r); |
3e0b5f0d | 787 | return ret; |
19a15b93 | 788 | } |
8e2b2b46 | 789 | a->offset = r->handler.offset; |
19a15b93 | 790 | |
97c18b7f SR |
791 | r->resource.release = release_address_handler; |
792 | ret = add_client_resource(client, &r->resource, GFP_KERNEL); | |
45ee3199 | 793 | if (ret < 0) { |
97c18b7f | 794 | release_address_handler(client, &r->resource); |
45ee3199 JF |
795 | return ret; |
796 | } | |
6e95dea7 | 797 | a->handle = r->resource.handle; |
19a15b93 KH |
798 | |
799 | return 0; | |
800 | } | |
801 | ||
6e95dea7 | 802 | static int ioctl_deallocate(struct client *client, union ioctl_arg *arg) |
9472316b | 803 | { |
6e95dea7 | 804 | return release_client_resource(client, arg->deallocate.handle, |
45ee3199 | 805 | release_address_handler, NULL); |
9472316b KH |
806 | } |
807 | ||
6e95dea7 | 808 | static int ioctl_send_response(struct client *client, union ioctl_arg *arg) |
19a15b93 | 809 | { |
6e95dea7 | 810 | struct fw_cdev_send_response *a = &arg->send_response; |
3964a449 | 811 | struct client_resource *resource; |
97c18b7f | 812 | struct inbound_transaction_resource *r; |
7e44c0b5 | 813 | int ret = 0; |
19a15b93 | 814 | |
6e95dea7 | 815 | if (release_client_resource(client, a->handle, |
45ee3199 | 816 | release_request, &resource) < 0) |
19a15b93 | 817 | return -EINVAL; |
45ee3199 | 818 | |
97c18b7f SR |
819 | r = container_of(resource, struct inbound_transaction_resource, |
820 | resource); | |
281e2032 SR |
821 | if (is_fcp_request(r->request)) |
822 | goto out; | |
823 | ||
a10c0ce7 CL |
824 | if (a->length != fw_get_response_length(r->request)) { |
825 | ret = -EINVAL; | |
826 | kfree(r->request); | |
827 | goto out; | |
828 | } | |
829 | if (copy_from_user(r->data, u64_to_uptr(a->data), a->length)) { | |
281e2032 SR |
830 | ret = -EFAULT; |
831 | kfree(r->request); | |
832 | goto out; | |
7e44c0b5 | 833 | } |
08bd34c9 | 834 | fw_send_response(r->card, r->request, a->rcode); |
7e44c0b5 | 835 | out: |
0244f573 | 836 | fw_card_put(r->card); |
19a15b93 KH |
837 | kfree(r); |
838 | ||
7e44c0b5 | 839 | return ret; |
19a15b93 KH |
840 | } |
841 | ||
6e95dea7 | 842 | static int ioctl_initiate_bus_reset(struct client *client, union ioctl_arg *arg) |
5371842b | 843 | { |
02d37bed | 844 | fw_schedule_bus_reset(client->device->card, true, |
6e95dea7 | 845 | arg->initiate_bus_reset.type == FW_CDEV_SHORT_RESET); |
02d37bed | 846 | return 0; |
5371842b KH |
847 | } |
848 | ||
3964a449 KH |
849 | static void release_descriptor(struct client *client, |
850 | struct client_resource *resource) | |
851 | { | |
97c18b7f SR |
852 | struct descriptor_resource *r = |
853 | container_of(resource, struct descriptor_resource, resource); | |
3964a449 | 854 | |
97c18b7f SR |
855 | fw_core_remove_descriptor(&r->descriptor); |
856 | kfree(r); | |
3964a449 KH |
857 | } |
858 | ||
6e95dea7 | 859 | static int ioctl_add_descriptor(struct client *client, union ioctl_arg *arg) |
66dea3e5 | 860 | { |
6e95dea7 | 861 | struct fw_cdev_add_descriptor *a = &arg->add_descriptor; |
97c18b7f | 862 | struct descriptor_resource *r; |
45ee3199 | 863 | int ret; |
66dea3e5 | 864 | |
de487da8 | 865 | /* Access policy: Allow this ioctl only on local nodes' device files. */ |
92368890 | 866 | if (!client->device->is_local) |
de487da8 SR |
867 | return -ENOSYS; |
868 | ||
6e95dea7 | 869 | if (a->length > 256) |
66dea3e5 KH |
870 | return -EINVAL; |
871 | ||
6e95dea7 | 872 | r = kmalloc(sizeof(*r) + a->length * 4, GFP_KERNEL); |
97c18b7f | 873 | if (r == NULL) |
66dea3e5 KH |
874 | return -ENOMEM; |
875 | ||
6e95dea7 | 876 | if (copy_from_user(r->data, u64_to_uptr(a->data), a->length * 4)) { |
45ee3199 JF |
877 | ret = -EFAULT; |
878 | goto failed; | |
66dea3e5 KH |
879 | } |
880 | ||
6e95dea7 SR |
881 | r->descriptor.length = a->length; |
882 | r->descriptor.immediate = a->immediate; | |
883 | r->descriptor.key = a->key; | |
97c18b7f | 884 | r->descriptor.data = r->data; |
66dea3e5 | 885 | |
97c18b7f | 886 | ret = fw_core_add_descriptor(&r->descriptor); |
45ee3199 JF |
887 | if (ret < 0) |
888 | goto failed; | |
66dea3e5 | 889 | |
97c18b7f SR |
890 | r->resource.release = release_descriptor; |
891 | ret = add_client_resource(client, &r->resource, GFP_KERNEL); | |
45ee3199 | 892 | if (ret < 0) { |
97c18b7f | 893 | fw_core_remove_descriptor(&r->descriptor); |
45ee3199 JF |
894 | goto failed; |
895 | } | |
6e95dea7 | 896 | a->handle = r->resource.handle; |
66dea3e5 KH |
897 | |
898 | return 0; | |
45ee3199 | 899 | failed: |
97c18b7f | 900 | kfree(r); |
45ee3199 JF |
901 | |
902 | return ret; | |
66dea3e5 KH |
903 | } |
904 | ||
6e95dea7 | 905 | static int ioctl_remove_descriptor(struct client *client, union ioctl_arg *arg) |
66dea3e5 | 906 | { |
6e95dea7 | 907 | return release_client_resource(client, arg->remove_descriptor.handle, |
45ee3199 | 908 | release_descriptor, NULL); |
66dea3e5 KH |
909 | } |
910 | ||
53dca511 SR |
911 | static void iso_callback(struct fw_iso_context *context, u32 cycle, |
912 | size_t header_length, void *header, void *data) | |
19a15b93 KH |
913 | { |
914 | struct client *client = data; | |
97c18b7f | 915 | struct iso_interrupt_event *e; |
19a15b93 | 916 | |
56d04cb1 | 917 | e = kmalloc(sizeof(*e) + header_length, GFP_ATOMIC); |
cfb0c9d1 | 918 | if (e == NULL) |
19a15b93 | 919 | return; |
cfb0c9d1 | 920 | |
97c18b7f SR |
921 | e->interrupt.type = FW_CDEV_EVENT_ISO_INTERRUPT; |
922 | e->interrupt.closure = client->iso_closure; | |
923 | e->interrupt.cycle = cycle; | |
924 | e->interrupt.header_length = header_length; | |
925 | memcpy(e->interrupt.header, header, header_length); | |
926 | queue_event(client, &e->event, &e->interrupt, | |
927 | sizeof(e->interrupt) + header_length, NULL, 0); | |
19a15b93 KH |
928 | } |
929 | ||
872e330e SR |
930 | static void iso_mc_callback(struct fw_iso_context *context, |
931 | dma_addr_t completed, void *data) | |
932 | { | |
933 | struct client *client = data; | |
934 | struct iso_interrupt_mc_event *e; | |
935 | ||
936 | e = kmalloc(sizeof(*e), GFP_ATOMIC); | |
cfb0c9d1 | 937 | if (e == NULL) |
872e330e | 938 | return; |
cfb0c9d1 | 939 | |
872e330e SR |
940 | e->interrupt.type = FW_CDEV_EVENT_ISO_INTERRUPT_MULTICHANNEL; |
941 | e->interrupt.closure = client->iso_closure; | |
942 | e->interrupt.completed = fw_iso_buffer_lookup(&client->buffer, | |
943 | completed); | |
944 | queue_event(client, &e->event, &e->interrupt, | |
945 | sizeof(e->interrupt), NULL, 0); | |
946 | } | |
947 | ||
0b6c4857 SR |
948 | static enum dma_data_direction iso_dma_direction(struct fw_iso_context *context) |
949 | { | |
950 | if (context->type == FW_ISO_CONTEXT_TRANSMIT) | |
951 | return DMA_TO_DEVICE; | |
952 | else | |
953 | return DMA_FROM_DEVICE; | |
954 | } | |
955 | ||
6e95dea7 | 956 | static int ioctl_create_iso_context(struct client *client, union ioctl_arg *arg) |
19a15b93 | 957 | { |
6e95dea7 | 958 | struct fw_cdev_create_iso_context *a = &arg->create_iso_context; |
24315c5e | 959 | struct fw_iso_context *context; |
872e330e | 960 | fw_iso_callback_t cb; |
0b6c4857 | 961 | int ret; |
19a15b93 | 962 | |
eb5b35a5 | 963 | BUILD_BUG_ON(FW_CDEV_ISO_CONTEXT_TRANSMIT != FW_ISO_CONTEXT_TRANSMIT || |
872e330e SR |
964 | FW_CDEV_ISO_CONTEXT_RECEIVE != FW_ISO_CONTEXT_RECEIVE || |
965 | FW_CDEV_ISO_CONTEXT_RECEIVE_MULTICHANNEL != | |
966 | FW_ISO_CONTEXT_RECEIVE_MULTICHANNEL); | |
21efb3cf | 967 | |
6e95dea7 | 968 | switch (a->type) { |
872e330e SR |
969 | case FW_ISO_CONTEXT_TRANSMIT: |
970 | if (a->speed > SCODE_3200 || a->channel > 63) | |
c70dc788 | 971 | return -EINVAL; |
872e330e SR |
972 | |
973 | cb = iso_callback; | |
c70dc788 KH |
974 | break; |
975 | ||
872e330e SR |
976 | case FW_ISO_CONTEXT_RECEIVE: |
977 | if (a->header_size < 4 || (a->header_size & 3) || | |
978 | a->channel > 63) | |
c70dc788 | 979 | return -EINVAL; |
872e330e SR |
980 | |
981 | cb = iso_callback; | |
982 | break; | |
983 | ||
984 | case FW_ISO_CONTEXT_RECEIVE_MULTICHANNEL: | |
985 | cb = (fw_iso_callback_t)iso_mc_callback; | |
c70dc788 KH |
986 | break; |
987 | ||
988 | default: | |
21efb3cf | 989 | return -EINVAL; |
c70dc788 KH |
990 | } |
991 | ||
6e95dea7 | 992 | context = fw_iso_context_create(client->device->card, a->type, |
872e330e | 993 | a->channel, a->speed, a->header_size, cb, client); |
24315c5e KH |
994 | if (IS_ERR(context)) |
995 | return PTR_ERR(context); | |
0699a73a CL |
996 | if (client->version < FW_CDEV_VERSION_AUTO_FLUSH_ISO_OVERFLOW) |
997 | context->drop_overflow_headers = true; | |
24315c5e | 998 | |
bdfe273e CL |
999 | /* We only support one context at this time. */ |
1000 | spin_lock_irq(&client->lock); | |
1001 | if (client->iso_context != NULL) { | |
1002 | spin_unlock_irq(&client->lock); | |
1003 | fw_iso_context_destroy(context); | |
0b6c4857 | 1004 | |
bdfe273e CL |
1005 | return -EBUSY; |
1006 | } | |
0b6c4857 SR |
1007 | if (!client->buffer_is_mapped) { |
1008 | ret = fw_iso_buffer_map_dma(&client->buffer, | |
1009 | client->device->card, | |
1010 | iso_dma_direction(context)); | |
1011 | if (ret < 0) { | |
1012 | spin_unlock_irq(&client->lock); | |
1013 | fw_iso_context_destroy(context); | |
1014 | ||
1015 | return ret; | |
1016 | } | |
1017 | client->buffer_is_mapped = true; | |
1018 | } | |
6e95dea7 | 1019 | client->iso_closure = a->closure; |
24315c5e | 1020 | client->iso_context = context; |
bdfe273e | 1021 | spin_unlock_irq(&client->lock); |
19a15b93 | 1022 | |
6e95dea7 | 1023 | a->handle = 0; |
abaa5743 | 1024 | |
19a15b93 KH |
1025 | return 0; |
1026 | } | |
1027 | ||
872e330e SR |
1028 | static int ioctl_set_iso_channels(struct client *client, union ioctl_arg *arg) |
1029 | { | |
1030 | struct fw_cdev_set_iso_channels *a = &arg->set_iso_channels; | |
1031 | struct fw_iso_context *ctx = client->iso_context; | |
1032 | ||
1033 | if (ctx == NULL || a->handle != 0) | |
1034 | return -EINVAL; | |
1035 | ||
1036 | return fw_iso_context_set_channels(ctx, &a->channels); | |
1037 | } | |
1038 | ||
1ca31ae7 KH |
1039 | /* Macros for decoding the iso packet control header. */ |
1040 | #define GET_PAYLOAD_LENGTH(v) ((v) & 0xffff) | |
1041 | #define GET_INTERRUPT(v) (((v) >> 16) & 0x01) | |
1042 | #define GET_SKIP(v) (((v) >> 17) & 0x01) | |
7a100344 SR |
1043 | #define GET_TAG(v) (((v) >> 18) & 0x03) |
1044 | #define GET_SY(v) (((v) >> 20) & 0x0f) | |
1ca31ae7 KH |
1045 | #define GET_HEADER_LENGTH(v) (((v) >> 24) & 0xff) |
1046 | ||
6e95dea7 | 1047 | static int ioctl_queue_iso(struct client *client, union ioctl_arg *arg) |
19a15b93 | 1048 | { |
6e95dea7 | 1049 | struct fw_cdev_queue_iso *a = &arg->queue_iso; |
19a15b93 | 1050 | struct fw_cdev_iso_packet __user *p, *end, *next; |
9b32d5f3 | 1051 | struct fw_iso_context *ctx = client->iso_context; |
872e330e | 1052 | unsigned long payload, buffer_end, transmit_header_bytes = 0; |
1ca31ae7 | 1053 | u32 control; |
19a15b93 KH |
1054 | int count; |
1055 | struct { | |
1056 | struct fw_iso_packet packet; | |
1057 | u8 header[256]; | |
1058 | } u; | |
1059 | ||
6e95dea7 | 1060 | if (ctx == NULL || a->handle != 0) |
19a15b93 | 1061 | return -EINVAL; |
19a15b93 | 1062 | |
c781c06d KH |
1063 | /* |
1064 | * If the user passes a non-NULL data pointer, has mmap()'ed | |
19a15b93 KH |
1065 | * the iso buffer, and the pointer points inside the buffer, |
1066 | * we setup the payload pointers accordingly. Otherwise we | |
9aad8125 | 1067 | * set them both to 0, which will still let packets with |
19a15b93 KH |
1068 | * payload_length == 0 through. In other words, if no packets |
1069 | * use the indirect payload, the iso buffer need not be mapped | |
6e95dea7 | 1070 | * and the a->data pointer is ignored. |
c781c06d | 1071 | */ |
6e95dea7 | 1072 | payload = (unsigned long)a->data - client->vm_start; |
ef370ee7 | 1073 | buffer_end = client->buffer.page_count << PAGE_SHIFT; |
6e95dea7 | 1074 | if (a->data == 0 || client->buffer.pages == NULL || |
ef370ee7 | 1075 | payload >= buffer_end) { |
9aad8125 | 1076 | payload = 0; |
ef370ee7 | 1077 | buffer_end = 0; |
19a15b93 KH |
1078 | } |
1079 | ||
872e330e SR |
1080 | if (ctx->type == FW_ISO_CONTEXT_RECEIVE_MULTICHANNEL && payload & 3) |
1081 | return -EINVAL; | |
1ccc9147 | 1082 | |
872e330e | 1083 | p = (struct fw_cdev_iso_packet __user *)u64_to_uptr(a->packets); |
96d4f267 | 1084 | if (!access_ok(p, a->size)) |
19a15b93 KH |
1085 | return -EFAULT; |
1086 | ||
6e95dea7 | 1087 | end = (void __user *)p + a->size; |
19a15b93 KH |
1088 | count = 0; |
1089 | while (p < end) { | |
1ca31ae7 | 1090 | if (get_user(control, &p->control)) |
19a15b93 | 1091 | return -EFAULT; |
1ca31ae7 KH |
1092 | u.packet.payload_length = GET_PAYLOAD_LENGTH(control); |
1093 | u.packet.interrupt = GET_INTERRUPT(control); | |
1094 | u.packet.skip = GET_SKIP(control); | |
1095 | u.packet.tag = GET_TAG(control); | |
1096 | u.packet.sy = GET_SY(control); | |
1097 | u.packet.header_length = GET_HEADER_LENGTH(control); | |
295e3feb | 1098 | |
872e330e SR |
1099 | switch (ctx->type) { |
1100 | case FW_ISO_CONTEXT_TRANSMIT: | |
1101 | if (u.packet.header_length & 3) | |
385ab5bc | 1102 | return -EINVAL; |
ae2a9766 | 1103 | transmit_header_bytes = u.packet.header_length; |
872e330e SR |
1104 | break; |
1105 | ||
1106 | case FW_ISO_CONTEXT_RECEIVE: | |
69e61d0c SR |
1107 | if (u.packet.header_length == 0 || |
1108 | u.packet.header_length % ctx->header_size != 0) | |
385ab5bc | 1109 | return -EINVAL; |
872e330e SR |
1110 | break; |
1111 | ||
1112 | case FW_ISO_CONTEXT_RECEIVE_MULTICHANNEL: | |
1113 | if (u.packet.payload_length == 0 || | |
1114 | u.packet.payload_length & 3) | |
295e3feb | 1115 | return -EINVAL; |
872e330e | 1116 | break; |
295e3feb KH |
1117 | } |
1118 | ||
19a15b93 | 1119 | next = (struct fw_cdev_iso_packet __user *) |
ae2a9766 | 1120 | &p->header[transmit_header_bytes / 4]; |
19a15b93 KH |
1121 | if (next > end) |
1122 | return -EINVAL; | |
1123 | if (__copy_from_user | |
ae2a9766 | 1124 | (u.packet.header, p->header, transmit_header_bytes)) |
19a15b93 | 1125 | return -EFAULT; |
98b6cbe8 | 1126 | if (u.packet.skip && ctx->type == FW_ISO_CONTEXT_TRANSMIT && |
19a15b93 KH |
1127 | u.packet.header_length + u.packet.payload_length > 0) |
1128 | return -EINVAL; | |
ef370ee7 | 1129 | if (payload + u.packet.payload_length > buffer_end) |
19a15b93 KH |
1130 | return -EINVAL; |
1131 | ||
9b32d5f3 KH |
1132 | if (fw_iso_context_queue(ctx, &u.packet, |
1133 | &client->buffer, payload)) | |
19a15b93 KH |
1134 | break; |
1135 | ||
1136 | p = next; | |
1137 | payload += u.packet.payload_length; | |
1138 | count++; | |
1139 | } | |
13882a82 | 1140 | fw_iso_context_queue_flush(ctx); |
19a15b93 | 1141 | |
6e95dea7 SR |
1142 | a->size -= uptr_to_u64(p) - a->packets; |
1143 | a->packets = uptr_to_u64(p); | |
1144 | a->data = client->vm_start + payload; | |
19a15b93 KH |
1145 | |
1146 | return count; | |
1147 | } | |
1148 | ||
6e95dea7 | 1149 | static int ioctl_start_iso(struct client *client, union ioctl_arg *arg) |
19a15b93 | 1150 | { |
6e95dea7 | 1151 | struct fw_cdev_start_iso *a = &arg->start_iso; |
19a15b93 | 1152 | |
eb5b35a5 SR |
1153 | BUILD_BUG_ON( |
1154 | FW_CDEV_ISO_CONTEXT_MATCH_TAG0 != FW_ISO_CONTEXT_MATCH_TAG0 || | |
1155 | FW_CDEV_ISO_CONTEXT_MATCH_TAG1 != FW_ISO_CONTEXT_MATCH_TAG1 || | |
1156 | FW_CDEV_ISO_CONTEXT_MATCH_TAG2 != FW_ISO_CONTEXT_MATCH_TAG2 || | |
1157 | FW_CDEV_ISO_CONTEXT_MATCH_TAG3 != FW_ISO_CONTEXT_MATCH_TAG3 || | |
1158 | FW_CDEV_ISO_CONTEXT_MATCH_ALL_TAGS != FW_ISO_CONTEXT_MATCH_ALL_TAGS); | |
1159 | ||
6e95dea7 | 1160 | if (client->iso_context == NULL || a->handle != 0) |
abaa5743 | 1161 | return -EINVAL; |
fae60312 | 1162 | |
6e95dea7 SR |
1163 | if (client->iso_context->type == FW_ISO_CONTEXT_RECEIVE && |
1164 | (a->tags == 0 || a->tags > 15 || a->sync > 15)) | |
1165 | return -EINVAL; | |
eb0306ea | 1166 | |
6e95dea7 SR |
1167 | return fw_iso_context_start(client->iso_context, |
1168 | a->cycle, a->sync, a->tags); | |
19a15b93 KH |
1169 | } |
1170 | ||
6e95dea7 | 1171 | static int ioctl_stop_iso(struct client *client, union ioctl_arg *arg) |
b8295668 | 1172 | { |
6e95dea7 | 1173 | struct fw_cdev_stop_iso *a = &arg->stop_iso; |
abaa5743 | 1174 | |
6e95dea7 | 1175 | if (client->iso_context == NULL || a->handle != 0) |
abaa5743 KH |
1176 | return -EINVAL; |
1177 | ||
b8295668 KH |
1178 | return fw_iso_context_stop(client->iso_context); |
1179 | } | |
1180 | ||
d1bbd209 CL |
1181 | static int ioctl_flush_iso(struct client *client, union ioctl_arg *arg) |
1182 | { | |
1183 | struct fw_cdev_flush_iso *a = &arg->flush_iso; | |
1184 | ||
1185 | if (client->iso_context == NULL || a->handle != 0) | |
1186 | return -EINVAL; | |
1187 | ||
1188 | return fw_iso_context_flush_completions(client->iso_context); | |
1189 | } | |
1190 | ||
6e95dea7 | 1191 | static int ioctl_get_cycle_timer2(struct client *client, union ioctl_arg *arg) |
a64408b9 | 1192 | { |
6e95dea7 | 1193 | struct fw_cdev_get_cycle_timer2 *a = &arg->get_cycle_timer2; |
a64408b9 | 1194 | struct fw_card *card = client->device->card; |
2c1bb29a | 1195 | struct timespec64 ts = {0, 0}; |
4a9bde9b | 1196 | u32 cycle_time; |
abfe5a01 | 1197 | int ret = 0; |
a64408b9 | 1198 | |
4a9bde9b | 1199 | local_irq_disable(); |
a64408b9 | 1200 | |
0fcff4e3 | 1201 | cycle_time = card->driver->read_csr(card, CSR_CYCLE_TIME); |
abfe5a01 | 1202 | |
6e95dea7 | 1203 | switch (a->clk_id) { |
2c1bb29a AB |
1204 | case CLOCK_REALTIME: ktime_get_real_ts64(&ts); break; |
1205 | case CLOCK_MONOTONIC: ktime_get_ts64(&ts); break; | |
1206 | case CLOCK_MONOTONIC_RAW: ktime_get_raw_ts64(&ts); break; | |
abfe5a01 SR |
1207 | default: |
1208 | ret = -EINVAL; | |
1209 | } | |
a64408b9 | 1210 | |
4a9bde9b | 1211 | local_irq_enable(); |
a64408b9 | 1212 | |
6e95dea7 SR |
1213 | a->tv_sec = ts.tv_sec; |
1214 | a->tv_nsec = ts.tv_nsec; | |
1215 | a->cycle_timer = cycle_time; | |
abfe5a01 SR |
1216 | |
1217 | return ret; | |
1218 | } | |
1219 | ||
6e95dea7 | 1220 | static int ioctl_get_cycle_timer(struct client *client, union ioctl_arg *arg) |
abfe5a01 | 1221 | { |
6e95dea7 | 1222 | struct fw_cdev_get_cycle_timer *a = &arg->get_cycle_timer; |
abfe5a01 SR |
1223 | struct fw_cdev_get_cycle_timer2 ct2; |
1224 | ||
1225 | ct2.clk_id = CLOCK_REALTIME; | |
6e95dea7 | 1226 | ioctl_get_cycle_timer2(client, (union ioctl_arg *)&ct2); |
abfe5a01 | 1227 | |
6e95dea7 SR |
1228 | a->local_time = ct2.tv_sec * USEC_PER_SEC + ct2.tv_nsec / NSEC_PER_USEC; |
1229 | a->cycle_timer = ct2.cycle_timer; | |
4a9bde9b | 1230 | |
a64408b9 SR |
1231 | return 0; |
1232 | } | |
1233 | ||
b1bda4cd JFSR |
1234 | static void iso_resource_work(struct work_struct *work) |
1235 | { | |
1236 | struct iso_resource_event *e; | |
1237 | struct iso_resource *r = | |
1238 | container_of(work, struct iso_resource, work.work); | |
1239 | struct client *client = r->client; | |
1240 | int generation, channel, bandwidth, todo; | |
1241 | bool skip, free, success; | |
1242 | ||
1243 | spin_lock_irq(&client->lock); | |
1244 | generation = client->device->generation; | |
1245 | todo = r->todo; | |
1246 | /* Allow 1000ms grace period for other reallocations. */ | |
1247 | if (todo == ISO_RES_ALLOC && | |
e71084af CL |
1248 | time_before64(get_jiffies_64(), |
1249 | client->device->card->reset_jiffies + HZ)) { | |
9fb551bf | 1250 | schedule_iso_resource(r, DIV_ROUND_UP(HZ, 3)); |
b1bda4cd JFSR |
1251 | skip = true; |
1252 | } else { | |
1253 | /* We could be called twice within the same generation. */ | |
1254 | skip = todo == ISO_RES_REALLOC && | |
1255 | r->generation == generation; | |
1256 | } | |
1ec3c026 SR |
1257 | free = todo == ISO_RES_DEALLOC || |
1258 | todo == ISO_RES_ALLOC_ONCE || | |
1259 | todo == ISO_RES_DEALLOC_ONCE; | |
b1bda4cd JFSR |
1260 | r->generation = generation; |
1261 | spin_unlock_irq(&client->lock); | |
1262 | ||
1263 | if (skip) | |
1264 | goto out; | |
1265 | ||
1266 | bandwidth = r->bandwidth; | |
1267 | ||
1268 | fw_iso_resource_manage(client->device->card, generation, | |
1269 | r->channels, &channel, &bandwidth, | |
1ec3c026 SR |
1270 | todo == ISO_RES_ALLOC || |
1271 | todo == ISO_RES_REALLOC || | |
f30e6d3e | 1272 | todo == ISO_RES_ALLOC_ONCE); |
b1bda4cd JFSR |
1273 | /* |
1274 | * Is this generation outdated already? As long as this resource sticks | |
1275 | * in the idr, it will be scheduled again for a newer generation or at | |
1276 | * shutdown. | |
1277 | */ | |
1278 | if (channel == -EAGAIN && | |
1279 | (todo == ISO_RES_ALLOC || todo == ISO_RES_REALLOC)) | |
1280 | goto out; | |
1281 | ||
1282 | success = channel >= 0 || bandwidth > 0; | |
1283 | ||
1284 | spin_lock_irq(&client->lock); | |
1285 | /* | |
1286 | * Transit from allocation to reallocation, except if the client | |
1287 | * requested deallocation in the meantime. | |
1288 | */ | |
1289 | if (r->todo == ISO_RES_ALLOC) | |
1290 | r->todo = ISO_RES_REALLOC; | |
1291 | /* | |
1292 | * Allocation or reallocation failure? Pull this resource out of the | |
1293 | * idr and prepare for deletion, unless the client is shutting down. | |
1294 | */ | |
1295 | if (r->todo == ISO_RES_REALLOC && !success && | |
1296 | !client->in_shutdown && | |
d3e709e6 | 1297 | idr_remove(&client->resource_idr, r->resource.handle)) { |
b1bda4cd JFSR |
1298 | client_put(client); |
1299 | free = true; | |
1300 | } | |
1301 | spin_unlock_irq(&client->lock); | |
1302 | ||
1303 | if (todo == ISO_RES_ALLOC && channel >= 0) | |
5d9cb7d2 | 1304 | r->channels = 1ULL << channel; |
b1bda4cd JFSR |
1305 | |
1306 | if (todo == ISO_RES_REALLOC && success) | |
1307 | goto out; | |
1308 | ||
1ec3c026 | 1309 | if (todo == ISO_RES_ALLOC || todo == ISO_RES_ALLOC_ONCE) { |
b1bda4cd JFSR |
1310 | e = r->e_alloc; |
1311 | r->e_alloc = NULL; | |
1312 | } else { | |
1313 | e = r->e_dealloc; | |
1314 | r->e_dealloc = NULL; | |
1315 | } | |
e21fcf79 SR |
1316 | e->iso_resource.handle = r->resource.handle; |
1317 | e->iso_resource.channel = channel; | |
1318 | e->iso_resource.bandwidth = bandwidth; | |
b1bda4cd JFSR |
1319 | |
1320 | queue_event(client, &e->event, | |
e21fcf79 | 1321 | &e->iso_resource, sizeof(e->iso_resource), NULL, 0); |
b1bda4cd JFSR |
1322 | |
1323 | if (free) { | |
1324 | cancel_delayed_work(&r->work); | |
1325 | kfree(r->e_alloc); | |
1326 | kfree(r->e_dealloc); | |
1327 | kfree(r); | |
1328 | } | |
1329 | out: | |
1330 | client_put(client); | |
1331 | } | |
1332 | ||
b1bda4cd JFSR |
1333 | static void release_iso_resource(struct client *client, |
1334 | struct client_resource *resource) | |
1335 | { | |
1336 | struct iso_resource *r = | |
1337 | container_of(resource, struct iso_resource, resource); | |
1338 | ||
1339 | spin_lock_irq(&client->lock); | |
1340 | r->todo = ISO_RES_DEALLOC; | |
9fb551bf | 1341 | schedule_iso_resource(r, 0); |
b1bda4cd JFSR |
1342 | spin_unlock_irq(&client->lock); |
1343 | } | |
1344 | ||
1ec3c026 SR |
1345 | static int init_iso_resource(struct client *client, |
1346 | struct fw_cdev_allocate_iso_resource *request, int todo) | |
b1bda4cd | 1347 | { |
b1bda4cd JFSR |
1348 | struct iso_resource_event *e1, *e2; |
1349 | struct iso_resource *r; | |
1350 | int ret; | |
1351 | ||
1352 | if ((request->channels == 0 && request->bandwidth == 0) || | |
bdabfa54 | 1353 | request->bandwidth > BANDWIDTH_AVAILABLE_INITIAL) |
b1bda4cd JFSR |
1354 | return -EINVAL; |
1355 | ||
1356 | r = kmalloc(sizeof(*r), GFP_KERNEL); | |
1357 | e1 = kmalloc(sizeof(*e1), GFP_KERNEL); | |
1358 | e2 = kmalloc(sizeof(*e2), GFP_KERNEL); | |
1359 | if (r == NULL || e1 == NULL || e2 == NULL) { | |
1360 | ret = -ENOMEM; | |
1361 | goto fail; | |
1362 | } | |
1363 | ||
1364 | INIT_DELAYED_WORK(&r->work, iso_resource_work); | |
1365 | r->client = client; | |
1ec3c026 | 1366 | r->todo = todo; |
b1bda4cd JFSR |
1367 | r->generation = -1; |
1368 | r->channels = request->channels; | |
1369 | r->bandwidth = request->bandwidth; | |
1370 | r->e_alloc = e1; | |
1371 | r->e_dealloc = e2; | |
1372 | ||
e21fcf79 SR |
1373 | e1->iso_resource.closure = request->closure; |
1374 | e1->iso_resource.type = FW_CDEV_EVENT_ISO_RESOURCE_ALLOCATED; | |
1375 | e2->iso_resource.closure = request->closure; | |
1376 | e2->iso_resource.type = FW_CDEV_EVENT_ISO_RESOURCE_DEALLOCATED; | |
b1bda4cd | 1377 | |
1ec3c026 SR |
1378 | if (todo == ISO_RES_ALLOC) { |
1379 | r->resource.release = release_iso_resource; | |
1380 | ret = add_client_resource(client, &r->resource, GFP_KERNEL); | |
81610b8f SR |
1381 | if (ret < 0) |
1382 | goto fail; | |
1ec3c026 SR |
1383 | } else { |
1384 | r->resource.release = NULL; | |
1385 | r->resource.handle = -1; | |
9fb551bf | 1386 | schedule_iso_resource(r, 0); |
1ec3c026 | 1387 | } |
b1bda4cd JFSR |
1388 | request->handle = r->resource.handle; |
1389 | ||
1390 | return 0; | |
1391 | fail: | |
1392 | kfree(r); | |
1393 | kfree(e1); | |
1394 | kfree(e2); | |
1395 | ||
1396 | return ret; | |
1397 | } | |
1398 | ||
6e95dea7 SR |
1399 | static int ioctl_allocate_iso_resource(struct client *client, |
1400 | union ioctl_arg *arg) | |
1ec3c026 | 1401 | { |
6e95dea7 SR |
1402 | return init_iso_resource(client, |
1403 | &arg->allocate_iso_resource, ISO_RES_ALLOC); | |
1ec3c026 SR |
1404 | } |
1405 | ||
6e95dea7 SR |
1406 | static int ioctl_deallocate_iso_resource(struct client *client, |
1407 | union ioctl_arg *arg) | |
b1bda4cd | 1408 | { |
6e95dea7 SR |
1409 | return release_client_resource(client, |
1410 | arg->deallocate.handle, release_iso_resource, NULL); | |
b1bda4cd JFSR |
1411 | } |
1412 | ||
6e95dea7 SR |
1413 | static int ioctl_allocate_iso_resource_once(struct client *client, |
1414 | union ioctl_arg *arg) | |
1ec3c026 | 1415 | { |
6e95dea7 SR |
1416 | return init_iso_resource(client, |
1417 | &arg->allocate_iso_resource, ISO_RES_ALLOC_ONCE); | |
1ec3c026 SR |
1418 | } |
1419 | ||
6e95dea7 SR |
1420 | static int ioctl_deallocate_iso_resource_once(struct client *client, |
1421 | union ioctl_arg *arg) | |
1ec3c026 | 1422 | { |
6e95dea7 SR |
1423 | return init_iso_resource(client, |
1424 | &arg->allocate_iso_resource, ISO_RES_DEALLOC_ONCE); | |
1ec3c026 SR |
1425 | } |
1426 | ||
c8a25900 SR |
1427 | /* |
1428 | * Returns a speed code: Maximum speed to or from this device, | |
1429 | * limited by the device's link speed, the local node's link speed, | |
1430 | * and all PHY port speeds between the two links. | |
1431 | */ | |
6e95dea7 | 1432 | static int ioctl_get_speed(struct client *client, union ioctl_arg *arg) |
33580a3e | 1433 | { |
c8a25900 | 1434 | return client->device->max_speed; |
33580a3e SR |
1435 | } |
1436 | ||
6e95dea7 SR |
1437 | static int ioctl_send_broadcast_request(struct client *client, |
1438 | union ioctl_arg *arg) | |
acfe8333 | 1439 | { |
6e95dea7 | 1440 | struct fw_cdev_send_request *a = &arg->send_request; |
acfe8333 | 1441 | |
6e95dea7 | 1442 | switch (a->tcode) { |
acfe8333 JFSR |
1443 | case TCODE_WRITE_QUADLET_REQUEST: |
1444 | case TCODE_WRITE_BLOCK_REQUEST: | |
1445 | break; | |
1446 | default: | |
1447 | return -EINVAL; | |
1448 | } | |
1449 | ||
1566f3dc | 1450 | /* Security policy: Only allow accesses to Units Space. */ |
6e95dea7 | 1451 | if (a->offset < CSR_REGISTER_BASE + CSR_CONFIG_ROM_END) |
1566f3dc SR |
1452 | return -EACCES; |
1453 | ||
6e95dea7 | 1454 | return init_request(client, a, LOCAL_BUS | 0x3f, SCODE_100); |
acfe8333 JFSR |
1455 | } |
1456 | ||
6e95dea7 | 1457 | static int ioctl_send_stream_packet(struct client *client, union ioctl_arg *arg) |
f8c2287c | 1458 | { |
6e95dea7 | 1459 | struct fw_cdev_send_stream_packet *a = &arg->send_stream_packet; |
18e9b10f SR |
1460 | struct fw_cdev_send_request request; |
1461 | int dest; | |
f8c2287c | 1462 | |
6e95dea7 SR |
1463 | if (a->speed > client->device->card->link_speed || |
1464 | a->length > 1024 << a->speed) | |
18e9b10f | 1465 | return -EIO; |
f8c2287c | 1466 | |
6e95dea7 | 1467 | if (a->tag > 3 || a->channel > 63 || a->sy > 15) |
18e9b10f SR |
1468 | return -EINVAL; |
1469 | ||
6e95dea7 | 1470 | dest = fw_stream_packet_destination_id(a->tag, a->channel, a->sy); |
18e9b10f | 1471 | request.tcode = TCODE_STREAM_DATA; |
6e95dea7 SR |
1472 | request.length = a->length; |
1473 | request.closure = a->closure; | |
1474 | request.data = a->data; | |
1475 | request.generation = a->generation; | |
18e9b10f | 1476 | |
6e95dea7 | 1477 | return init_request(client, &request, dest, a->speed); |
f8c2287c JF |
1478 | } |
1479 | ||
850bb6f2 SR |
1480 | static void outbound_phy_packet_callback(struct fw_packet *packet, |
1481 | struct fw_card *card, int status) | |
1482 | { | |
1483 | struct outbound_phy_packet_event *e = | |
1484 | container_of(packet, struct outbound_phy_packet_event, p); | |
1485 | ||
1486 | switch (status) { | |
1487 | /* expected: */ | |
1488 | case ACK_COMPLETE: e->phy_packet.rcode = RCODE_COMPLETE; break; | |
1489 | /* should never happen with PHY packets: */ | |
1490 | case ACK_PENDING: e->phy_packet.rcode = RCODE_COMPLETE; break; | |
1491 | case ACK_BUSY_X: | |
1492 | case ACK_BUSY_A: | |
1493 | case ACK_BUSY_B: e->phy_packet.rcode = RCODE_BUSY; break; | |
1494 | case ACK_DATA_ERROR: e->phy_packet.rcode = RCODE_DATA_ERROR; break; | |
1495 | case ACK_TYPE_ERROR: e->phy_packet.rcode = RCODE_TYPE_ERROR; break; | |
1496 | /* stale generation; cancelled; on certain controllers: no ack */ | |
1497 | default: e->phy_packet.rcode = status; break; | |
1498 | } | |
cc550216 | 1499 | e->phy_packet.data[0] = packet->timestamp; |
850bb6f2 | 1500 | |
cc550216 SR |
1501 | queue_event(e->client, &e->event, &e->phy_packet, |
1502 | sizeof(e->phy_packet) + e->phy_packet.length, NULL, 0); | |
850bb6f2 SR |
1503 | client_put(e->client); |
1504 | } | |
1505 | ||
1506 | static int ioctl_send_phy_packet(struct client *client, union ioctl_arg *arg) | |
1507 | { | |
1508 | struct fw_cdev_send_phy_packet *a = &arg->send_phy_packet; | |
1509 | struct fw_card *card = client->device->card; | |
1510 | struct outbound_phy_packet_event *e; | |
1511 | ||
1512 | /* Access policy: Allow this ioctl only on local nodes' device files. */ | |
1513 | if (!client->device->is_local) | |
1514 | return -ENOSYS; | |
1515 | ||
cc550216 | 1516 | e = kzalloc(sizeof(*e) + 4, GFP_KERNEL); |
850bb6f2 SR |
1517 | if (e == NULL) |
1518 | return -ENOMEM; | |
1519 | ||
1520 | client_get(client); | |
1521 | e->client = client; | |
1522 | e->p.speed = SCODE_100; | |
1523 | e->p.generation = a->generation; | |
5b06db16 CL |
1524 | e->p.header[0] = TCODE_LINK_INTERNAL << 4; |
1525 | e->p.header[1] = a->data[0]; | |
1526 | e->p.header[2] = a->data[1]; | |
1527 | e->p.header_length = 12; | |
850bb6f2 SR |
1528 | e->p.callback = outbound_phy_packet_callback; |
1529 | e->phy_packet.closure = a->closure; | |
1530 | e->phy_packet.type = FW_CDEV_EVENT_PHY_PACKET_SENT; | |
cc550216 SR |
1531 | if (is_ping_packet(a->data)) |
1532 | e->phy_packet.length = 4; | |
850bb6f2 SR |
1533 | |
1534 | card->driver->send_request(card, &e->p); | |
1535 | ||
1536 | return 0; | |
1537 | } | |
1538 | ||
bf54e146 SR |
1539 | static int ioctl_receive_phy_packets(struct client *client, union ioctl_arg *arg) |
1540 | { | |
1541 | struct fw_cdev_receive_phy_packets *a = &arg->receive_phy_packets; | |
1542 | struct fw_card *card = client->device->card; | |
1543 | ||
1544 | /* Access policy: Allow this ioctl only on local nodes' device files. */ | |
1545 | if (!client->device->is_local) | |
1546 | return -ENOSYS; | |
1547 | ||
1548 | spin_lock_irq(&card->lock); | |
1549 | ||
1550 | list_move_tail(&client->phy_receiver_link, &card->phy_receiver_list); | |
1551 | client->phy_receiver_closure = a->closure; | |
1552 | ||
1553 | spin_unlock_irq(&card->lock); | |
1554 | ||
1555 | return 0; | |
1556 | } | |
1557 | ||
1558 | void fw_cdev_handle_phy_packet(struct fw_card *card, struct fw_packet *p) | |
1559 | { | |
1560 | struct client *client; | |
1561 | struct inbound_phy_packet_event *e; | |
1562 | unsigned long flags; | |
1563 | ||
1564 | spin_lock_irqsave(&card->lock, flags); | |
1565 | ||
1566 | list_for_each_entry(client, &card->phy_receiver_list, phy_receiver_link) { | |
1567 | e = kmalloc(sizeof(*e) + 8, GFP_ATOMIC); | |
cfb0c9d1 | 1568 | if (e == NULL) |
bf54e146 | 1569 | break; |
cfb0c9d1 | 1570 | |
bf54e146 SR |
1571 | e->phy_packet.closure = client->phy_receiver_closure; |
1572 | e->phy_packet.type = FW_CDEV_EVENT_PHY_PACKET_RECEIVED; | |
1573 | e->phy_packet.rcode = RCODE_COMPLETE; | |
1574 | e->phy_packet.length = 8; | |
1575 | e->phy_packet.data[0] = p->header[1]; | |
1576 | e->phy_packet.data[1] = p->header[2]; | |
1577 | queue_event(client, &e->event, | |
1578 | &e->phy_packet, sizeof(e->phy_packet) + 8, NULL, 0); | |
1579 | } | |
1580 | ||
1581 | spin_unlock_irqrestore(&card->lock, flags); | |
1582 | } | |
1583 | ||
6e95dea7 | 1584 | static int (* const ioctl_handlers[])(struct client *, union ioctl_arg *) = { |
b9dc61cf SR |
1585 | [0x00] = ioctl_get_info, |
1586 | [0x01] = ioctl_send_request, | |
1587 | [0x02] = ioctl_allocate, | |
1588 | [0x03] = ioctl_deallocate, | |
1589 | [0x04] = ioctl_send_response, | |
1590 | [0x05] = ioctl_initiate_bus_reset, | |
1591 | [0x06] = ioctl_add_descriptor, | |
1592 | [0x07] = ioctl_remove_descriptor, | |
1593 | [0x08] = ioctl_create_iso_context, | |
1594 | [0x09] = ioctl_queue_iso, | |
1595 | [0x0a] = ioctl_start_iso, | |
1596 | [0x0b] = ioctl_stop_iso, | |
1597 | [0x0c] = ioctl_get_cycle_timer, | |
1598 | [0x0d] = ioctl_allocate_iso_resource, | |
1599 | [0x0e] = ioctl_deallocate_iso_resource, | |
1600 | [0x0f] = ioctl_allocate_iso_resource_once, | |
1601 | [0x10] = ioctl_deallocate_iso_resource_once, | |
1602 | [0x11] = ioctl_get_speed, | |
1603 | [0x12] = ioctl_send_broadcast_request, | |
1604 | [0x13] = ioctl_send_stream_packet, | |
1605 | [0x14] = ioctl_get_cycle_timer2, | |
850bb6f2 | 1606 | [0x15] = ioctl_send_phy_packet, |
bf54e146 | 1607 | [0x16] = ioctl_receive_phy_packets, |
872e330e | 1608 | [0x17] = ioctl_set_iso_channels, |
d1bbd209 | 1609 | [0x18] = ioctl_flush_iso, |
4f259223 KH |
1610 | }; |
1611 | ||
53dca511 SR |
1612 | static int dispatch_ioctl(struct client *client, |
1613 | unsigned int cmd, void __user *arg) | |
19a15b93 | 1614 | { |
6e95dea7 | 1615 | union ioctl_arg buffer; |
2dbd7d7e | 1616 | int ret; |
4f259223 | 1617 | |
64582298 SR |
1618 | if (fw_device_is_shutdown(client->device)) |
1619 | return -ENODEV; | |
1620 | ||
4f259223 | 1621 | if (_IOC_TYPE(cmd) != '#' || |
9cac00b8 SR |
1622 | _IOC_NR(cmd) >= ARRAY_SIZE(ioctl_handlers) || |
1623 | _IOC_SIZE(cmd) > sizeof(buffer)) | |
d873d794 | 1624 | return -ENOTTY; |
4f259223 | 1625 | |
eaca2d8e | 1626 | memset(&buffer, 0, sizeof(buffer)); |
9cac00b8 SR |
1627 | |
1628 | if (_IOC_DIR(cmd) & _IOC_WRITE) | |
1629 | if (copy_from_user(&buffer, arg, _IOC_SIZE(cmd))) | |
4f259223 | 1630 | return -EFAULT; |
4f259223 | 1631 | |
6e95dea7 | 1632 | ret = ioctl_handlers[_IOC_NR(cmd)](client, &buffer); |
2dbd7d7e SR |
1633 | if (ret < 0) |
1634 | return ret; | |
4f259223 | 1635 | |
9cac00b8 SR |
1636 | if (_IOC_DIR(cmd) & _IOC_READ) |
1637 | if (copy_to_user(arg, &buffer, _IOC_SIZE(cmd))) | |
4f259223 | 1638 | return -EFAULT; |
4f259223 | 1639 | |
2dbd7d7e | 1640 | return ret; |
19a15b93 KH |
1641 | } |
1642 | ||
53dca511 SR |
1643 | static long fw_device_op_ioctl(struct file *file, |
1644 | unsigned int cmd, unsigned long arg) | |
19a15b93 | 1645 | { |
64582298 | 1646 | return dispatch_ioctl(file->private_data, cmd, (void __user *)arg); |
19a15b93 KH |
1647 | } |
1648 | ||
1649 | #ifdef CONFIG_COMPAT | |
53dca511 SR |
1650 | static long fw_device_op_compat_ioctl(struct file *file, |
1651 | unsigned int cmd, unsigned long arg) | |
19a15b93 | 1652 | { |
64582298 | 1653 | return dispatch_ioctl(file->private_data, cmd, compat_ptr(arg)); |
19a15b93 KH |
1654 | } |
1655 | #endif | |
1656 | ||
1657 | static int fw_device_op_mmap(struct file *file, struct vm_area_struct *vma) | |
1658 | { | |
1659 | struct client *client = file->private_data; | |
9aad8125 | 1660 | unsigned long size; |
2dbd7d7e | 1661 | int page_count, ret; |
9aad8125 | 1662 | |
551f4cb9 JF |
1663 | if (fw_device_is_shutdown(client->device)) |
1664 | return -ENODEV; | |
1665 | ||
9aad8125 KH |
1666 | /* FIXME: We could support multiple buffers, but we don't. */ |
1667 | if (client->buffer.pages != NULL) | |
1668 | return -EBUSY; | |
1669 | ||
1670 | if (!(vma->vm_flags & VM_SHARED)) | |
1671 | return -EINVAL; | |
19a15b93 | 1672 | |
9aad8125 | 1673 | if (vma->vm_start & ~PAGE_MASK) |
19a15b93 KH |
1674 | return -EINVAL; |
1675 | ||
1676 | client->vm_start = vma->vm_start; | |
9aad8125 KH |
1677 | size = vma->vm_end - vma->vm_start; |
1678 | page_count = size >> PAGE_SHIFT; | |
1679 | if (size & ~PAGE_MASK) | |
1680 | return -EINVAL; | |
1681 | ||
0b6c4857 | 1682 | ret = fw_iso_buffer_alloc(&client->buffer, page_count); |
2dbd7d7e SR |
1683 | if (ret < 0) |
1684 | return ret; | |
19a15b93 | 1685 | |
0b6c4857 SR |
1686 | spin_lock_irq(&client->lock); |
1687 | if (client->iso_context) { | |
1688 | ret = fw_iso_buffer_map_dma(&client->buffer, | |
1689 | client->device->card, | |
1690 | iso_dma_direction(client->iso_context)); | |
1691 | client->buffer_is_mapped = (ret == 0); | |
1692 | } | |
1693 | spin_unlock_irq(&client->lock); | |
2dbd7d7e | 1694 | if (ret < 0) |
0b6c4857 | 1695 | goto fail; |
9aad8125 | 1696 | |
0b6c4857 SR |
1697 | ret = fw_iso_buffer_map_vma(&client->buffer, vma); |
1698 | if (ret < 0) | |
1699 | goto fail; | |
1700 | ||
1701 | return 0; | |
1702 | fail: | |
1703 | fw_iso_buffer_destroy(&client->buffer, client->device->card); | |
2dbd7d7e | 1704 | return ret; |
19a15b93 KH |
1705 | } |
1706 | ||
5a5e62da CL |
1707 | static int is_outbound_transaction_resource(int id, void *p, void *data) |
1708 | { | |
1709 | struct client_resource *resource = p; | |
1710 | ||
1711 | return resource->release == release_transaction; | |
1712 | } | |
1713 | ||
1714 | static int has_outbound_transactions(struct client *client) | |
1715 | { | |
1716 | int ret; | |
1717 | ||
1718 | spin_lock_irq(&client->lock); | |
1719 | ret = idr_for_each(&client->resource_idr, | |
1720 | is_outbound_transaction_resource, NULL); | |
1721 | spin_unlock_irq(&client->lock); | |
1722 | ||
1723 | return ret; | |
1724 | } | |
1725 | ||
45ee3199 JF |
1726 | static int shutdown_resource(int id, void *p, void *data) |
1727 | { | |
e21fcf79 | 1728 | struct client_resource *resource = p; |
45ee3199 JF |
1729 | struct client *client = data; |
1730 | ||
e21fcf79 | 1731 | resource->release(client, resource); |
fb443036 | 1732 | client_put(client); |
45ee3199 JF |
1733 | |
1734 | return 0; | |
1735 | } | |
1736 | ||
19a15b93 KH |
1737 | static int fw_device_op_release(struct inode *inode, struct file *file) |
1738 | { | |
1739 | struct client *client = file->private_data; | |
e21fcf79 | 1740 | struct event *event, *next_event; |
19a15b93 | 1741 | |
bf54e146 SR |
1742 | spin_lock_irq(&client->device->card->lock); |
1743 | list_del(&client->phy_receiver_link); | |
1744 | spin_unlock_irq(&client->device->card->lock); | |
1745 | ||
97811e34 SR |
1746 | mutex_lock(&client->device->client_list_mutex); |
1747 | list_del(&client->link); | |
1748 | mutex_unlock(&client->device->client_list_mutex); | |
1749 | ||
19a15b93 KH |
1750 | if (client->iso_context) |
1751 | fw_iso_context_destroy(client->iso_context); | |
1752 | ||
36a755cf SR |
1753 | if (client->buffer.pages) |
1754 | fw_iso_buffer_destroy(&client->buffer, client->device->card); | |
1755 | ||
45ee3199 | 1756 | /* Freeze client->resource_idr and client->event_list */ |
3ba94986 | 1757 | spin_lock_irq(&client->lock); |
45ee3199 | 1758 | client->in_shutdown = true; |
3ba94986 | 1759 | spin_unlock_irq(&client->lock); |
66dea3e5 | 1760 | |
5a5e62da CL |
1761 | wait_event(client->tx_flush_wait, !has_outbound_transactions(client)); |
1762 | ||
45ee3199 | 1763 | idr_for_each(&client->resource_idr, shutdown_resource, client); |
45ee3199 | 1764 | idr_destroy(&client->resource_idr); |
28cf6a04 | 1765 | |
e21fcf79 SR |
1766 | list_for_each_entry_safe(event, next_event, &client->event_list, link) |
1767 | kfree(event); | |
19a15b93 | 1768 | |
fb443036 | 1769 | client_put(client); |
19a15b93 KH |
1770 | |
1771 | return 0; | |
1772 | } | |
1773 | ||
afc9a42b | 1774 | static __poll_t fw_device_op_poll(struct file *file, poll_table * pt) |
19a15b93 KH |
1775 | { |
1776 | struct client *client = file->private_data; | |
afc9a42b | 1777 | __poll_t mask = 0; |
19a15b93 KH |
1778 | |
1779 | poll_wait(file, &client->wait, pt); | |
1780 | ||
2603bf21 | 1781 | if (fw_device_is_shutdown(client->device)) |
a9a08845 | 1782 | mask |= EPOLLHUP | EPOLLERR; |
19a15b93 | 1783 | if (!list_empty(&client->event_list)) |
a9a08845 | 1784 | mask |= EPOLLIN | EPOLLRDNORM; |
2603bf21 KH |
1785 | |
1786 | return mask; | |
19a15b93 KH |
1787 | } |
1788 | ||
21ebcd12 | 1789 | const struct file_operations fw_device_ops = { |
19a15b93 | 1790 | .owner = THIS_MODULE, |
3ac26b2e | 1791 | .llseek = no_llseek, |
19a15b93 KH |
1792 | .open = fw_device_op_open, |
1793 | .read = fw_device_op_read, | |
1794 | .unlocked_ioctl = fw_device_op_ioctl, | |
19a15b93 | 1795 | .mmap = fw_device_op_mmap, |
3ac26b2e SR |
1796 | .release = fw_device_op_release, |
1797 | .poll = fw_device_op_poll, | |
19a15b93 | 1798 | #ifdef CONFIG_COMPAT |
5af4e5ea | 1799 | .compat_ioctl = fw_device_op_compat_ioctl, |
19a15b93 KH |
1800 | #endif |
1801 | }; |