2 * Copyright (C) 2015 Etnaviv Project
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms of the GNU General Public License version 2 as published by
6 * the Free Software Foundation.
8 * This program is distributed in the hope that it will be useful, but WITHOUT
9 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
10 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
13 * You should have received a copy of the GNU General Public License along with
14 * this program. If not, see <http://www.gnu.org/licenses/>.
17 #include <linux/reservation.h>
18 #include "etnaviv_drv.h"
19 #include "etnaviv_gpu.h"
20 #include "etnaviv_gem.h"
23 * Cmdstream submission:
26 #define BO_INVALID_FLAGS ~(ETNA_SUBMIT_BO_READ | ETNA_SUBMIT_BO_WRITE)
27 /* make sure these don't conflict w/ ETNAVIV_SUBMIT_BO_x */
28 #define BO_LOCKED 0x4000
29 #define BO_PINNED 0x2000
31 static inline void __user *to_user_ptr(u64 address)
33 return (void __user *)(uintptr_t)address;
36 static struct etnaviv_gem_submit *submit_create(struct drm_device *dev,
37 struct etnaviv_gpu *gpu, size_t nr)
39 struct etnaviv_gem_submit *submit;
40 size_t sz = size_vstruct(nr, sizeof(submit->bos[0]), sizeof(*submit));
42 submit = kmalloc(sz, GFP_TEMPORARY | __GFP_NOWARN | __GFP_NORETRY);
47 /* initially, until copy_from_user() and bo lookup succeeds: */
50 ww_acquire_init(&submit->ticket, &reservation_ww_class);
56 static int submit_lookup_objects(struct etnaviv_gem_submit *submit,
57 struct drm_file *file, struct drm_etnaviv_gem_submit_bo *submit_bos,
60 struct drm_etnaviv_gem_submit_bo *bo;
64 spin_lock(&file->table_lock);
66 for (i = 0, bo = submit_bos; i < nr_bos; i++, bo++) {
67 struct drm_gem_object *obj;
69 if (bo->flags & BO_INVALID_FLAGS) {
70 DRM_ERROR("invalid flags: %x\n", bo->flags);
75 submit->bos[i].flags = bo->flags;
77 /* normally use drm_gem_object_lookup(), but for bulk lookup
78 * all under single table_lock just hit object_idr directly:
80 obj = idr_find(&file->object_idr, bo->handle);
82 DRM_ERROR("invalid handle %u at index %u\n",
89 * Take a refcount on the object. The file table lock
90 * prevents the object_idr's refcount on this being dropped.
92 drm_gem_object_reference(obj);
94 submit->bos[i].obj = to_etnaviv_bo(obj);
99 spin_unlock(&file->table_lock);
104 static void submit_unlock_object(struct etnaviv_gem_submit *submit, int i)
106 if (submit->bos[i].flags & BO_LOCKED) {
107 struct etnaviv_gem_object *etnaviv_obj = submit->bos[i].obj;
109 ww_mutex_unlock(&etnaviv_obj->resv->lock);
110 submit->bos[i].flags &= ~BO_LOCKED;
114 static int submit_lock_objects(struct etnaviv_gem_submit *submit)
116 int contended, slow_locked = -1, i, ret = 0;
119 for (i = 0; i < submit->nr_bos; i++) {
120 struct etnaviv_gem_object *etnaviv_obj = submit->bos[i].obj;
122 if (slow_locked == i)
127 if (!(submit->bos[i].flags & BO_LOCKED)) {
128 ret = ww_mutex_lock_interruptible(&etnaviv_obj->resv->lock,
130 if (ret == -EALREADY)
131 DRM_ERROR("BO at index %u already on submit list\n",
135 submit->bos[i].flags |= BO_LOCKED;
139 ww_acquire_done(&submit->ticket);
145 submit_unlock_object(submit, i);
148 submit_unlock_object(submit, slow_locked);
150 if (ret == -EDEADLK) {
151 struct etnaviv_gem_object *etnaviv_obj;
153 etnaviv_obj = submit->bos[contended].obj;
155 /* we lost out in a seqno race, lock and retry.. */
156 ret = ww_mutex_lock_slow_interruptible(&etnaviv_obj->resv->lock,
159 submit->bos[contended].flags |= BO_LOCKED;
160 slow_locked = contended;
168 static int submit_fence_sync(const struct etnaviv_gem_submit *submit)
170 unsigned int context = submit->gpu->fence_context;
173 for (i = 0; i < submit->nr_bos; i++) {
174 struct etnaviv_gem_object *etnaviv_obj = submit->bos[i].obj;
175 bool write = submit->bos[i].flags & ETNA_SUBMIT_BO_WRITE;
177 ret = etnaviv_gpu_fence_sync_obj(etnaviv_obj, context, write);
185 static void submit_unpin_objects(struct etnaviv_gem_submit *submit)
189 for (i = 0; i < submit->nr_bos; i++) {
190 struct etnaviv_gem_object *etnaviv_obj = submit->bos[i].obj;
192 if (submit->bos[i].flags & BO_PINNED)
193 etnaviv_gem_put_iova(submit->gpu, &etnaviv_obj->base);
195 submit->bos[i].iova = 0;
196 submit->bos[i].flags &= ~BO_PINNED;
200 static int submit_pin_objects(struct etnaviv_gem_submit *submit)
204 for (i = 0; i < submit->nr_bos; i++) {
205 struct etnaviv_gem_object *etnaviv_obj = submit->bos[i].obj;
208 ret = etnaviv_gem_get_iova(submit->gpu, &etnaviv_obj->base,
213 submit->bos[i].flags |= BO_PINNED;
214 submit->bos[i].iova = iova;
220 static int submit_bo(struct etnaviv_gem_submit *submit, u32 idx,
221 struct etnaviv_gem_object **obj, u32 *iova)
223 if (idx >= submit->nr_bos) {
224 DRM_ERROR("invalid buffer index: %u (out of %u)\n",
225 idx, submit->nr_bos);
230 *obj = submit->bos[idx].obj;
232 *iova = submit->bos[idx].iova;
237 /* process the reloc's and patch up the cmdstream as needed: */
238 static int submit_reloc(struct etnaviv_gem_submit *submit, void *stream,
239 u32 size, const struct drm_etnaviv_gem_submit_reloc *relocs,
242 u32 i, last_offset = 0;
246 for (i = 0; i < nr_relocs; i++) {
247 const struct drm_etnaviv_gem_submit_reloc *r = relocs + i;
248 struct etnaviv_gem_object *bobj;
251 if (unlikely(r->flags)) {
252 DRM_ERROR("invalid reloc flags\n");
256 if (r->submit_offset % 4) {
257 DRM_ERROR("non-aligned reloc offset: %u\n",
262 /* offset in dwords: */
263 off = r->submit_offset / 4;
265 if ((off >= size ) ||
266 (off < last_offset)) {
267 DRM_ERROR("invalid offset %u at reloc %u\n", off, i);
271 ret = submit_bo(submit, r->reloc_idx, &bobj, &iova);
275 if (r->reloc_offset >=
276 bobj->base.size - sizeof(*ptr)) {
277 DRM_ERROR("relocation %u outside object", i);
281 ptr[off] = iova + r->reloc_offset;
289 static void submit_cleanup(struct etnaviv_gem_submit *submit)
293 for (i = 0; i < submit->nr_bos; i++) {
294 struct etnaviv_gem_object *etnaviv_obj = submit->bos[i].obj;
296 submit_unlock_object(submit, i);
297 drm_gem_object_unreference_unlocked(&etnaviv_obj->base);
300 ww_acquire_fini(&submit->ticket);
304 int etnaviv_ioctl_gem_submit(struct drm_device *dev, void *data,
305 struct drm_file *file)
307 struct etnaviv_drm_private *priv = dev->dev_private;
308 struct drm_etnaviv_gem_submit *args = data;
309 struct drm_etnaviv_gem_submit_reloc *relocs;
310 struct drm_etnaviv_gem_submit_bo *bos;
311 struct etnaviv_gem_submit *submit;
312 struct etnaviv_cmdbuf *cmdbuf;
313 struct etnaviv_gpu *gpu;
317 if (args->pipe >= ETNA_MAX_PIPES)
320 gpu = priv->gpu[args->pipe];
324 if (args->stream_size % 4) {
325 DRM_ERROR("non-aligned cmdstream buffer size: %u\n",
330 if (args->exec_state != ETNA_PIPE_3D &&
331 args->exec_state != ETNA_PIPE_2D &&
332 args->exec_state != ETNA_PIPE_VG) {
333 DRM_ERROR("invalid exec_state: 0x%x\n", args->exec_state);
338 * Copy the command submission and bo array to kernel space in
339 * one go, and do this outside of any locks.
341 bos = drm_malloc_ab(args->nr_bos, sizeof(*bos));
342 relocs = drm_malloc_ab(args->nr_relocs, sizeof(*relocs));
343 stream = drm_malloc_ab(1, args->stream_size);
344 cmdbuf = etnaviv_gpu_cmdbuf_new(gpu, ALIGN(args->stream_size, 8) + 8,
346 if (!bos || !relocs || !stream || !cmdbuf) {
348 goto err_submit_cmds;
351 cmdbuf->exec_state = args->exec_state;
352 cmdbuf->ctx = file->driver_priv;
354 ret = copy_from_user(bos, to_user_ptr(args->bos),
355 args->nr_bos * sizeof(*bos));
358 goto err_submit_cmds;
361 ret = copy_from_user(relocs, to_user_ptr(args->relocs),
362 args->nr_relocs * sizeof(*relocs));
365 goto err_submit_cmds;
368 ret = copy_from_user(stream, to_user_ptr(args->stream),
372 goto err_submit_cmds;
375 submit = submit_create(dev, gpu, args->nr_bos);
378 goto err_submit_cmds;
381 ret = submit_lookup_objects(submit, file, bos, args->nr_bos);
383 goto err_submit_objects;
385 ret = submit_lock_objects(submit);
387 goto err_submit_objects;
389 if (!etnaviv_cmd_validate_one(gpu, stream, args->stream_size / 4,
390 relocs, args->nr_relocs)) {
392 goto err_submit_objects;
395 ret = submit_fence_sync(submit);
397 goto err_submit_objects;
399 ret = submit_pin_objects(submit);
403 ret = submit_reloc(submit, stream, args->stream_size / 4,
404 relocs, args->nr_relocs);
408 memcpy(cmdbuf->vaddr, stream, args->stream_size);
409 cmdbuf->user_size = ALIGN(args->stream_size, 8);
411 ret = etnaviv_gpu_submit(gpu, submit, cmdbuf);
415 args->fence = submit->fence;
418 submit_unpin_objects(submit);
421 * If we're returning -EAGAIN, it may be due to the userptr code
422 * wanting to run its workqueue outside of any locks. Flush our
423 * workqueue to ensure that it is run in a timely manner.
426 flush_workqueue(priv->wq);
429 submit_cleanup(submit);
432 /* if we still own the cmdbuf */
434 etnaviv_gpu_cmdbuf_free(cmdbuf);
436 drm_free_large(stream);
440 drm_free_large(relocs);