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_drm.h"
26 #include "nouveau_usif.h"
28 #include <nvif/notify.h>
29 #include <nvif/unpack.h>
30 #include <nvif/client.h>
31 #include <nvif/event.h>
32 #include <nvif/ioctl.h>
34 struct usif_notify_p {
35 struct drm_pending_event base;
37 struct drm_event base;
43 struct list_head head;
49 struct usif_notify_p *p;
52 static inline struct usif_notify *
53 usif_notify_find(struct drm_file *filp, u32 handle)
55 struct nouveau_cli *cli = nouveau_cli(filp);
56 struct usif_notify *ntfy;
57 list_for_each_entry(ntfy, &cli->notifys, head) {
58 if (ntfy->handle == handle)
65 usif_notify_dtor(struct usif_notify *ntfy)
67 list_del(&ntfy->head);
72 usif_notify(const void *header, u32 length, const void *data, u32 size)
74 struct usif_notify *ntfy = NULL;
76 struct nvif_notify_rep_v0 v0;
78 struct drm_device *dev;
79 struct drm_file *filp;
82 if (length == sizeof(rep->v0) && rep->v0.version == 0) {
83 if (WARN_ON(!(ntfy = (void *)(unsigned long)rep->v0.token)))
84 return NVIF_NOTIFY_DROP;
85 BUG_ON(rep->v0.route != NVDRM_NOTIFY_USIF);
88 return NVIF_NOTIFY_DROP;
90 if (WARN_ON(!ntfy->p || ntfy->reply != (length + size)))
91 return NVIF_NOTIFY_DROP;
92 filp = ntfy->p->base.file_priv;
93 dev = filp->minor->dev;
95 memcpy(&ntfy->p->e.data[0], header, length);
96 memcpy(&ntfy->p->e.data[length], data, size);
97 switch (rep->v0.version) {
99 struct nvif_notify_rep_v0 *rep = (void *)ntfy->p->e.data;
100 rep->route = ntfy->route;
101 rep->token = ntfy->token;
109 spin_lock_irqsave(&dev->event_lock, flags);
110 if (!WARN_ON(filp->event_space < ntfy->p->e.base.length)) {
111 list_add_tail(&ntfy->p->base.link, &filp->event_list);
112 filp->event_space -= ntfy->p->e.base.length;
114 wake_up_interruptible(&filp->event_wait);
115 spin_unlock_irqrestore(&dev->event_lock, flags);
116 atomic_set(&ntfy->enabled, 0);
117 return NVIF_NOTIFY_DROP;
121 usif_notify_new(struct drm_file *f, void *data, u32 size, void *argv, u32 argc)
123 struct nouveau_cli *cli = nouveau_cli(f);
124 struct nvif_client *client = &cli->base;
126 struct nvif_ioctl_ntfy_new_v0 v0;
129 struct nvif_notify_req_v0 v0;
131 struct usif_notify *ntfy;
134 if (nvif_unpack(args->v0, 0, 0, true)) {
135 if (usif_notify_find(f, args->v0.index))
141 if (!(ntfy = kmalloc(sizeof(*ntfy), GFP_KERNEL)))
143 atomic_set(&ntfy->enabled, 0);
145 if (nvif_unpack(req->v0, 0, 0, true)) {
146 ntfy->reply = sizeof(struct nvif_notify_rep_v0) + req->v0.reply;
147 ntfy->route = req->v0.route;
148 ntfy->token = req->v0.token;
149 req->v0.route = NVDRM_NOTIFY_USIF;
150 req->v0.token = (unsigned long)(void *)ntfy;
151 ret = nvif_client_ioctl(client, argv, argc);
152 req->v0.token = ntfy->token;
153 req->v0.route = ntfy->route;
154 ntfy->handle = args->v0.index;
158 list_add(&ntfy->head, &cli->notifys);
165 usif_notify_del(struct drm_file *f, void *data, u32 size, void *argv, u32 argc)
167 struct nouveau_cli *cli = nouveau_cli(f);
168 struct nvif_client *client = &cli->base;
170 struct nvif_ioctl_ntfy_del_v0 v0;
172 struct usif_notify *ntfy;
175 if (nvif_unpack(args->v0, 0, 0, true)) {
176 if (!(ntfy = usif_notify_find(f, args->v0.index)))
181 ret = nvif_client_ioctl(client, argv, argc);
183 usif_notify_dtor(ntfy);
188 usif_notify_get(struct drm_file *f, void *data, u32 size, void *argv, u32 argc)
190 struct nouveau_cli *cli = nouveau_cli(f);
191 struct nvif_client *client = &cli->base;
193 struct nvif_ioctl_ntfy_del_v0 v0;
195 struct usif_notify *ntfy;
198 if (nvif_unpack(args->v0, 0, 0, true)) {
199 if (!(ntfy = usif_notify_find(f, args->v0.index)))
204 if (atomic_xchg(&ntfy->enabled, 1))
207 ntfy->p = kmalloc(sizeof(*ntfy->p) + ntfy->reply, GFP_KERNEL);
208 if (ret = -ENOMEM, !ntfy->p)
210 ntfy->p->base.event = &ntfy->p->e.base;
211 ntfy->p->base.file_priv = f;
212 ntfy->p->base.pid = current->pid;
213 ntfy->p->base.destroy =(void(*)(struct drm_pending_event *))kfree;
214 ntfy->p->e.base.type = DRM_NOUVEAU_EVENT_NVIF;
215 ntfy->p->e.base.length = sizeof(ntfy->p->e.base) + ntfy->reply;
217 ret = nvif_client_ioctl(client, argv, argc);
220 atomic_set(&ntfy->enabled, 0);
227 usif_notify_put(struct drm_file *f, void *data, u32 size, void *argv, u32 argc)
229 struct nouveau_cli *cli = nouveau_cli(f);
230 struct nvif_client *client = &cli->base;
232 struct nvif_ioctl_ntfy_put_v0 v0;
234 struct usif_notify *ntfy;
237 if (nvif_unpack(args->v0, 0, 0, true)) {
238 if (!(ntfy = usif_notify_find(f, args->v0.index)))
243 ret = nvif_client_ioctl(client, argv, argc);
244 if (ret == 0 && atomic_xchg(&ntfy->enabled, 0))
250 struct list_head head;
251 struct list_head ntfy;
257 usif_object_dtor(struct usif_object *object)
259 list_del(&object->head);
264 usif_object_new(struct drm_file *f, void *data, u32 size, void *argv, u32 argc)
266 struct nouveau_cli *cli = nouveau_cli(f);
267 struct nvif_client *client = &cli->base;
269 struct nvif_ioctl_new_v0 v0;
271 struct usif_object *object;
274 if (!(object = kmalloc(sizeof(*object), GFP_KERNEL)))
276 list_add(&object->head, &cli->objects);
278 if (nvif_unpack(args->v0, 0, 0, true)) {
279 object->route = args->v0.route;
280 object->token = args->v0.token;
281 args->v0.route = NVDRM_OBJECT_USIF;
282 args->v0.token = (unsigned long)(void *)object;
283 ret = nvif_client_ioctl(client, argv, argc);
284 args->v0.token = object->token;
285 args->v0.route = object->route;
289 usif_object_dtor(object);
294 usif_ioctl(struct drm_file *filp, void __user *user, u32 argc)
296 struct nouveau_cli *cli = nouveau_cli(filp);
297 struct nvif_client *client = &cli->base;
298 void *data = kmalloc(argc, GFP_KERNEL);
301 struct nvif_ioctl_v0 v0;
303 struct usif_object *object;
307 if (ret = -ENOMEM, !argv)
309 if (ret = -EFAULT, copy_from_user(argv, user, size))
312 if (nvif_unpack(argv->v0, 0, 0, true)) {
313 /* block access to objects not created via this interface */
314 owner = argv->v0.owner;
315 argv->v0.owner = NVDRM_OBJECT_USIF;
319 mutex_lock(&cli->mutex);
320 switch (argv->v0.type) {
321 case NVIF_IOCTL_V0_NEW:
322 /* ... except if we're creating children */
323 argv->v0.owner = NVIF_IOCTL_V0_OWNER_ANY;
324 ret = usif_object_new(filp, data, size, argv, argc);
326 case NVIF_IOCTL_V0_NTFY_NEW:
327 ret = usif_notify_new(filp, data, size, argv, argc);
329 case NVIF_IOCTL_V0_NTFY_DEL:
330 ret = usif_notify_del(filp, data, size, argv, argc);
332 case NVIF_IOCTL_V0_NTFY_GET:
333 ret = usif_notify_get(filp, data, size, argv, argc);
335 case NVIF_IOCTL_V0_NTFY_PUT:
336 ret = usif_notify_put(filp, data, size, argv, argc);
339 ret = nvif_client_ioctl(client, argv, argc);
342 if (argv->v0.route == NVDRM_OBJECT_USIF) {
343 object = (void *)(unsigned long)argv->v0.token;
344 argv->v0.route = object->route;
345 argv->v0.token = object->token;
346 if (ret == 0 && argv->v0.type == NVIF_IOCTL_V0_DEL) {
347 list_del(&object->head);
351 argv->v0.route = NVIF_IOCTL_V0_ROUTE_HIDDEN;
354 argv->v0.owner = owner;
355 mutex_unlock(&cli->mutex);
357 if (copy_to_user(user, argv, argc))
365 usif_client_fini(struct nouveau_cli *cli)
367 struct usif_object *object, *otemp;
368 struct usif_notify *notify, *ntemp;
370 list_for_each_entry_safe(notify, ntemp, &cli->notifys, head) {
371 usif_notify_dtor(notify);
374 list_for_each_entry_safe(object, otemp, &cli->objects, head) {
375 usif_object_dtor(object);
380 usif_client_init(struct nouveau_cli *cli)
382 INIT_LIST_HEAD(&cli->objects);
383 INIT_LIST_HEAD(&cli->notifys);