2 * Copyright 2014 Red Hat Inc.
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
11 * The above copyright notice and this permission notice shall be included in
12 * all copies or substantial portions of the Software.
14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
18 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
20 * OTHER DEALINGS IN THE SOFTWARE.
22 * Authors: Ben Skeggs <bskeggs@redhat.com>
25 #include "nouveau_drv.h"
26 #include "nouveau_usif.h"
27 #include "nouveau_abi16.h"
29 #include <nvif/notify.h>
30 #include <nvif/unpack.h>
31 #include <nvif/client.h>
32 #include <nvif/event.h>
33 #include <nvif/ioctl.h>
35 struct usif_notify_p {
36 struct drm_pending_event base;
38 struct drm_event base;
44 struct list_head head;
50 struct usif_notify_p *p;
53 static inline struct usif_notify *
54 usif_notify_find(struct drm_file *filp, u32 handle)
56 struct nouveau_cli *cli = nouveau_cli(filp);
57 struct usif_notify *ntfy;
58 list_for_each_entry(ntfy, &cli->notifys, head) {
59 if (ntfy->handle == handle)
66 usif_notify_dtor(struct usif_notify *ntfy)
68 list_del(&ntfy->head);
73 usif_notify(const void *header, u32 length, const void *data, u32 size)
75 struct usif_notify *ntfy = NULL;
77 struct nvif_notify_rep_v0 v0;
79 struct drm_device *dev;
80 struct drm_file *filp;
83 if (length == sizeof(rep->v0) && rep->v0.version == 0) {
84 if (WARN_ON(!(ntfy = (void *)(unsigned long)rep->v0.token)))
85 return NVIF_NOTIFY_DROP;
86 BUG_ON(rep->v0.route != NVDRM_NOTIFY_USIF);
89 return NVIF_NOTIFY_DROP;
91 if (WARN_ON(!ntfy->p || ntfy->reply != (length + size)))
92 return NVIF_NOTIFY_DROP;
93 filp = ntfy->p->base.file_priv;
94 dev = filp->minor->dev;
96 memcpy(&ntfy->p->e.data[0], header, length);
97 memcpy(&ntfy->p->e.data[length], data, size);
98 switch (rep->v0.version) {
100 struct nvif_notify_rep_v0 *rep = (void *)ntfy->p->e.data;
101 rep->route = ntfy->route;
102 rep->token = ntfy->token;
110 spin_lock_irqsave(&dev->event_lock, flags);
111 if (!WARN_ON(filp->event_space < ntfy->p->e.base.length)) {
112 list_add_tail(&ntfy->p->base.link, &filp->event_list);
113 filp->event_space -= ntfy->p->e.base.length;
115 wake_up_interruptible(&filp->event_wait);
116 spin_unlock_irqrestore(&dev->event_lock, flags);
117 atomic_set(&ntfy->enabled, 0);
118 return NVIF_NOTIFY_DROP;
122 usif_notify_new(struct drm_file *f, void *data, u32 size, void *argv, u32 argc)
124 struct nouveau_cli *cli = nouveau_cli(f);
125 struct nvif_client *client = &cli->base;
127 struct nvif_ioctl_ntfy_new_v0 v0;
130 struct nvif_notify_req_v0 v0;
132 struct usif_notify *ntfy;
135 if (!(ret = nvif_unpack(ret, &data, &size, args->v0, 0, 0, true))) {
136 if (usif_notify_find(f, args->v0.index))
143 if (!(ntfy = kmalloc(sizeof(*ntfy), GFP_KERNEL)))
145 atomic_set(&ntfy->enabled, 0);
147 if (!(ret = nvif_unpack(ret, &data, &size, req->v0, 0, 0, true))) {
148 ntfy->reply = sizeof(struct nvif_notify_rep_v0) + req->v0.reply;
149 ntfy->route = req->v0.route;
150 ntfy->token = req->v0.token;
151 req->v0.route = NVDRM_NOTIFY_USIF;
152 req->v0.token = (unsigned long)(void *)ntfy;
153 ret = nvif_client_ioctl(client, argv, argc);
154 req->v0.token = ntfy->token;
155 req->v0.route = ntfy->route;
156 ntfy->handle = args->v0.index;
160 list_add(&ntfy->head, &cli->notifys);
167 usif_notify_del(struct drm_file *f, void *data, u32 size, void *argv, u32 argc)
169 struct nouveau_cli *cli = nouveau_cli(f);
170 struct nvif_client *client = &cli->base;
172 struct nvif_ioctl_ntfy_del_v0 v0;
174 struct usif_notify *ntfy;
177 if (!(ret = nvif_unpack(ret, &data, &size, args->v0, 0, 0, true))) {
178 if (!(ntfy = usif_notify_find(f, args->v0.index)))
183 ret = nvif_client_ioctl(client, argv, argc);
185 usif_notify_dtor(ntfy);
190 usif_notify_get(struct drm_file *f, void *data, u32 size, void *argv, u32 argc)
192 struct nouveau_cli *cli = nouveau_cli(f);
193 struct nvif_client *client = &cli->base;
195 struct nvif_ioctl_ntfy_del_v0 v0;
197 struct usif_notify *ntfy;
200 if (!(ret = nvif_unpack(ret, &data, &size, args->v0, 0, 0, true))) {
201 if (!(ntfy = usif_notify_find(f, args->v0.index)))
206 if (atomic_xchg(&ntfy->enabled, 1))
209 ntfy->p = kmalloc(sizeof(*ntfy->p) + ntfy->reply, GFP_KERNEL);
210 if (ret = -ENOMEM, !ntfy->p)
212 ntfy->p->base.event = &ntfy->p->e.base;
213 ntfy->p->base.file_priv = f;
214 ntfy->p->base.pid = current->pid;
215 ntfy->p->e.base.type = DRM_NOUVEAU_EVENT_NVIF;
216 ntfy->p->e.base.length = sizeof(ntfy->p->e.base) + ntfy->reply;
218 ret = nvif_client_ioctl(client, argv, argc);
221 atomic_set(&ntfy->enabled, 0);
228 usif_notify_put(struct drm_file *f, void *data, u32 size, void *argv, u32 argc)
230 struct nouveau_cli *cli = nouveau_cli(f);
231 struct nvif_client *client = &cli->base;
233 struct nvif_ioctl_ntfy_put_v0 v0;
235 struct usif_notify *ntfy;
238 if (!(ret = nvif_unpack(ret, &data, &size, args->v0, 0, 0, true))) {
239 if (!(ntfy = usif_notify_find(f, args->v0.index)))
244 ret = nvif_client_ioctl(client, argv, argc);
245 if (ret == 0 && atomic_xchg(&ntfy->enabled, 0))
251 struct list_head head;
252 struct list_head ntfy;
258 usif_object_dtor(struct usif_object *object)
260 list_del(&object->head);
265 usif_object_new(struct drm_file *f, void *data, u32 size, void *argv, u32 argc)
267 struct nouveau_cli *cli = nouveau_cli(f);
268 struct nvif_client *client = &cli->base;
270 struct nvif_ioctl_new_v0 v0;
272 struct usif_object *object;
275 if (!(object = kmalloc(sizeof(*object), GFP_KERNEL)))
277 list_add(&object->head, &cli->objects);
279 if (!(ret = nvif_unpack(ret, &data, &size, args->v0, 0, 0, true))) {
280 object->route = args->v0.route;
281 object->token = args->v0.token;
282 args->v0.route = NVDRM_OBJECT_USIF;
283 args->v0.token = (unsigned long)(void *)object;
284 ret = nvif_client_ioctl(client, argv, argc);
285 args->v0.token = object->token;
286 args->v0.route = object->route;
290 usif_object_dtor(object);
295 usif_ioctl(struct drm_file *filp, void __user *user, u32 argc)
297 struct nouveau_cli *cli = nouveau_cli(filp);
298 struct nvif_client *client = &cli->base;
299 void *data = kmalloc(argc, GFP_KERNEL);
302 struct nvif_ioctl_v0 v0;
304 struct usif_object *object;
308 if (ret = -ENOMEM, !argv)
310 if (ret = -EFAULT, copy_from_user(argv, user, size))
313 if (!(ret = nvif_unpack(-ENOSYS, &data, &size, argv->v0, 0, 0, true))) {
314 /* block access to objects not created via this interface */
315 owner = argv->v0.owner;
316 if (argv->v0.object == 0ULL &&
317 argv->v0.type != NVIF_IOCTL_V0_DEL)
318 argv->v0.owner = NVDRM_OBJECT_ANY; /* except client */
320 argv->v0.owner = NVDRM_OBJECT_USIF;
324 /* USIF slightly abuses some return-only ioctl members in order
325 * to provide interoperability with the older ABI16 objects
327 mutex_lock(&cli->mutex);
328 if (argv->v0.route) {
329 if (ret = -EINVAL, argv->v0.route == 0xff)
330 ret = nouveau_abi16_usif(filp, argv, argc);
332 mutex_unlock(&cli->mutex);
337 switch (argv->v0.type) {
338 case NVIF_IOCTL_V0_NEW:
339 ret = usif_object_new(filp, data, size, argv, argc);
341 case NVIF_IOCTL_V0_NTFY_NEW:
342 ret = usif_notify_new(filp, data, size, argv, argc);
344 case NVIF_IOCTL_V0_NTFY_DEL:
345 ret = usif_notify_del(filp, data, size, argv, argc);
347 case NVIF_IOCTL_V0_NTFY_GET:
348 ret = usif_notify_get(filp, data, size, argv, argc);
350 case NVIF_IOCTL_V0_NTFY_PUT:
351 ret = usif_notify_put(filp, data, size, argv, argc);
354 ret = nvif_client_ioctl(client, argv, argc);
357 if (argv->v0.route == NVDRM_OBJECT_USIF) {
358 object = (void *)(unsigned long)argv->v0.token;
359 argv->v0.route = object->route;
360 argv->v0.token = object->token;
361 if (ret == 0 && argv->v0.type == NVIF_IOCTL_V0_DEL) {
362 list_del(&object->head);
366 argv->v0.route = NVIF_IOCTL_V0_ROUTE_HIDDEN;
369 argv->v0.owner = owner;
370 mutex_unlock(&cli->mutex);
372 if (copy_to_user(user, argv, argc))
380 usif_client_fini(struct nouveau_cli *cli)
382 struct usif_object *object, *otemp;
383 struct usif_notify *notify, *ntemp;
385 list_for_each_entry_safe(notify, ntemp, &cli->notifys, head) {
386 usif_notify_dtor(notify);
389 list_for_each_entry_safe(object, otemp, &cli->objects, head) {
390 usif_object_dtor(object);
395 usif_client_init(struct nouveau_cli *cli)
397 INIT_LIST_HEAD(&cli->objects);
398 INIT_LIST_HEAD(&cli->notifys);