1 // SPDX-License-Identifier: GPL-2.0-only
3 * Copyright (C) 2015 Etnaviv Project
6 #include <linux/dma-fence-array.h>
7 #include <linux/dma-resv.h>
8 #include <linux/sync_file.h>
9 #include "etnaviv_cmdbuf.h"
10 #include "etnaviv_drv.h"
11 #include "etnaviv_gpu.h"
12 #include "etnaviv_gem.h"
13 #include "etnaviv_perfmon.h"
14 #include "etnaviv_sched.h"
17 * Cmdstream submission:
20 #define BO_INVALID_FLAGS ~(ETNA_SUBMIT_BO_READ | ETNA_SUBMIT_BO_WRITE)
21 /* make sure these don't conflict w/ ETNAVIV_SUBMIT_BO_x */
22 #define BO_LOCKED 0x4000
23 #define BO_PINNED 0x2000
25 static struct etnaviv_gem_submit *submit_create(struct drm_device *dev,
26 struct etnaviv_gpu *gpu, size_t nr_bos, size_t nr_pmrs)
28 struct etnaviv_gem_submit *submit;
29 size_t sz = size_vstruct(nr_bos, sizeof(submit->bos[0]), sizeof(*submit));
31 submit = kzalloc(sz, GFP_KERNEL);
35 submit->pmrs = kcalloc(nr_pmrs, sizeof(struct etnaviv_perfmon_request),
41 submit->nr_pmrs = nr_pmrs;
44 kref_init(&submit->refcount);
49 static int submit_lookup_objects(struct etnaviv_gem_submit *submit,
50 struct drm_file *file, struct drm_etnaviv_gem_submit_bo *submit_bos,
53 struct drm_etnaviv_gem_submit_bo *bo;
57 spin_lock(&file->table_lock);
59 for (i = 0, bo = submit_bos; i < nr_bos; i++, bo++) {
60 struct drm_gem_object *obj;
62 if (bo->flags & BO_INVALID_FLAGS) {
63 DRM_ERROR("invalid flags: %x\n", bo->flags);
68 submit->bos[i].flags = bo->flags;
70 /* normally use drm_gem_object_lookup(), but for bulk lookup
71 * all under single table_lock just hit object_idr directly:
73 obj = idr_find(&file->object_idr, bo->handle);
75 DRM_ERROR("invalid handle %u at index %u\n",
82 * Take a refcount on the object. The file table lock
83 * prevents the object_idr's refcount on this being dropped.
85 drm_gem_object_get(obj);
87 submit->bos[i].obj = to_etnaviv_bo(obj);
92 spin_unlock(&file->table_lock);
97 static void submit_unlock_object(struct etnaviv_gem_submit *submit, int i)
99 if (submit->bos[i].flags & BO_LOCKED) {
100 struct drm_gem_object *obj = &submit->bos[i].obj->base;
102 ww_mutex_unlock(&obj->resv->lock);
103 submit->bos[i].flags &= ~BO_LOCKED;
107 static int submit_lock_objects(struct etnaviv_gem_submit *submit,
108 struct ww_acquire_ctx *ticket)
110 int contended, slow_locked = -1, i, ret = 0;
113 for (i = 0; i < submit->nr_bos; i++) {
114 struct drm_gem_object *obj = &submit->bos[i].obj->base;
116 if (slow_locked == i)
121 if (!(submit->bos[i].flags & BO_LOCKED)) {
122 ret = ww_mutex_lock_interruptible(&obj->resv->lock,
124 if (ret == -EALREADY)
125 DRM_ERROR("BO at index %u already on submit list\n",
129 submit->bos[i].flags |= BO_LOCKED;
133 ww_acquire_done(ticket);
139 submit_unlock_object(submit, i);
142 submit_unlock_object(submit, slow_locked);
144 if (ret == -EDEADLK) {
145 struct drm_gem_object *obj;
147 obj = &submit->bos[contended].obj->base;
149 /* we lost out in a seqno race, lock and retry.. */
150 ret = ww_mutex_lock_slow_interruptible(&obj->resv->lock,
153 submit->bos[contended].flags |= BO_LOCKED;
154 slow_locked = contended;
162 static int submit_fence_sync(struct etnaviv_gem_submit *submit)
166 for (i = 0; i < submit->nr_bos; i++) {
167 struct etnaviv_gem_submit_bo *bo = &submit->bos[i];
168 struct dma_resv *robj = bo->obj->base.resv;
170 if (!(bo->flags & ETNA_SUBMIT_BO_WRITE)) {
171 ret = dma_resv_reserve_shared(robj, 1);
176 if (submit->flags & ETNA_SUBMIT_NO_IMPLICIT)
179 if (bo->flags & ETNA_SUBMIT_BO_WRITE) {
180 ret = dma_resv_get_fences_rcu(robj, &bo->excl,
186 bo->excl = dma_resv_get_excl_rcu(robj);
194 static void submit_attach_object_fences(struct etnaviv_gem_submit *submit)
198 for (i = 0; i < submit->nr_bos; i++) {
199 struct drm_gem_object *obj = &submit->bos[i].obj->base;
201 if (submit->bos[i].flags & ETNA_SUBMIT_BO_WRITE)
202 dma_resv_add_excl_fence(obj->resv,
205 dma_resv_add_shared_fence(obj->resv,
208 submit_unlock_object(submit, i);
212 static int submit_pin_objects(struct etnaviv_gem_submit *submit)
216 for (i = 0; i < submit->nr_bos; i++) {
217 struct etnaviv_gem_object *etnaviv_obj = submit->bos[i].obj;
218 struct etnaviv_vram_mapping *mapping;
220 mapping = etnaviv_gem_mapping_get(&etnaviv_obj->base,
222 if (IS_ERR(mapping)) {
223 ret = PTR_ERR(mapping);
226 atomic_inc(&etnaviv_obj->gpu_active);
228 submit->bos[i].flags |= BO_PINNED;
229 submit->bos[i].mapping = mapping;
235 static int submit_bo(struct etnaviv_gem_submit *submit, u32 idx,
236 struct etnaviv_gem_submit_bo **bo)
238 if (idx >= submit->nr_bos) {
239 DRM_ERROR("invalid buffer index: %u (out of %u)\n",
240 idx, submit->nr_bos);
244 *bo = &submit->bos[idx];
249 /* process the reloc's and patch up the cmdstream as needed: */
250 static int submit_reloc(struct etnaviv_gem_submit *submit, void *stream,
251 u32 size, const struct drm_etnaviv_gem_submit_reloc *relocs,
254 u32 i, last_offset = 0;
258 for (i = 0; i < nr_relocs; i++) {
259 const struct drm_etnaviv_gem_submit_reloc *r = relocs + i;
260 struct etnaviv_gem_submit_bo *bo;
263 if (unlikely(r->flags)) {
264 DRM_ERROR("invalid reloc flags\n");
268 if (r->submit_offset % 4) {
269 DRM_ERROR("non-aligned reloc offset: %u\n",
274 /* offset in dwords: */
275 off = r->submit_offset / 4;
277 if ((off >= size ) ||
278 (off < last_offset)) {
279 DRM_ERROR("invalid offset %u at reloc %u\n", off, i);
283 ret = submit_bo(submit, r->reloc_idx, &bo);
287 if (r->reloc_offset > bo->obj->base.size - sizeof(*ptr)) {
288 DRM_ERROR("relocation %u outside object\n", i);
292 ptr[off] = bo->mapping->iova + r->reloc_offset;
300 static int submit_perfmon_validate(struct etnaviv_gem_submit *submit,
301 u32 exec_state, const struct drm_etnaviv_gem_submit_pmr *pmrs)
305 for (i = 0; i < submit->nr_pmrs; i++) {
306 const struct drm_etnaviv_gem_submit_pmr *r = pmrs + i;
307 struct etnaviv_gem_submit_bo *bo;
310 ret = submit_bo(submit, r->read_idx, &bo);
314 /* at offset 0 a sequence number gets stored used for userspace sync */
315 if (r->read_offset == 0) {
316 DRM_ERROR("perfmon request: offset is 0");
320 if (r->read_offset >= bo->obj->base.size - sizeof(u32)) {
321 DRM_ERROR("perfmon request: offset %u outside object", i);
325 if (r->flags & ~(ETNA_PM_PROCESS_PRE | ETNA_PM_PROCESS_POST)) {
326 DRM_ERROR("perfmon request: flags are not valid");
330 if (etnaviv_pm_req_validate(r, exec_state)) {
331 DRM_ERROR("perfmon request: domain or signal not valid");
335 submit->pmrs[i].flags = r->flags;
336 submit->pmrs[i].domain = r->domain;
337 submit->pmrs[i].signal = r->signal;
338 submit->pmrs[i].sequence = r->sequence;
339 submit->pmrs[i].offset = r->read_offset;
340 submit->pmrs[i].bo_vma = etnaviv_gem_vmap(&bo->obj->base);
346 static void submit_cleanup(struct kref *kref)
348 struct etnaviv_gem_submit *submit =
349 container_of(kref, struct etnaviv_gem_submit, refcount);
352 if (submit->runtime_resumed)
353 pm_runtime_put_autosuspend(submit->gpu->dev);
355 if (submit->cmdbuf.suballoc)
356 etnaviv_cmdbuf_free(&submit->cmdbuf);
358 for (i = 0; i < submit->nr_bos; i++) {
359 struct etnaviv_gem_object *etnaviv_obj = submit->bos[i].obj;
361 /* unpin all objects */
362 if (submit->bos[i].flags & BO_PINNED) {
363 etnaviv_gem_mapping_unreference(submit->bos[i].mapping);
364 atomic_dec(&etnaviv_obj->gpu_active);
365 submit->bos[i].mapping = NULL;
366 submit->bos[i].flags &= ~BO_PINNED;
369 /* if the GPU submit failed, objects might still be locked */
370 submit_unlock_object(submit, i);
371 drm_gem_object_put_unlocked(&etnaviv_obj->base);
374 wake_up_all(&submit->gpu->fence_event);
376 if (submit->in_fence)
377 dma_fence_put(submit->in_fence);
378 if (submit->out_fence) {
379 /* first remove from IDR, so fence can not be found anymore */
380 mutex_lock(&submit->gpu->fence_lock);
381 idr_remove(&submit->gpu->fence_idr, submit->out_fence_id);
382 mutex_unlock(&submit->gpu->fence_lock);
383 dma_fence_put(submit->out_fence);
389 void etnaviv_submit_put(struct etnaviv_gem_submit *submit)
391 kref_put(&submit->refcount, submit_cleanup);
394 int etnaviv_ioctl_gem_submit(struct drm_device *dev, void *data,
395 struct drm_file *file)
397 struct etnaviv_file_private *ctx = file->driver_priv;
398 struct etnaviv_drm_private *priv = dev->dev_private;
399 struct drm_etnaviv_gem_submit *args = data;
400 struct drm_etnaviv_gem_submit_reloc *relocs;
401 struct drm_etnaviv_gem_submit_pmr *pmrs;
402 struct drm_etnaviv_gem_submit_bo *bos;
403 struct etnaviv_gem_submit *submit;
404 struct etnaviv_gpu *gpu;
405 struct sync_file *sync_file = NULL;
406 struct ww_acquire_ctx ticket;
407 int out_fence_fd = -1;
411 if (args->pipe >= ETNA_MAX_PIPES)
414 gpu = priv->gpu[args->pipe];
418 if (args->stream_size % 4) {
419 DRM_ERROR("non-aligned cmdstream buffer size: %u\n",
424 if (args->exec_state != ETNA_PIPE_3D &&
425 args->exec_state != ETNA_PIPE_2D &&
426 args->exec_state != ETNA_PIPE_VG) {
427 DRM_ERROR("invalid exec_state: 0x%x\n", args->exec_state);
431 if (args->flags & ~ETNA_SUBMIT_FLAGS) {
432 DRM_ERROR("invalid flags: 0x%x\n", args->flags);
437 * Copy the command submission and bo array to kernel space in
438 * one go, and do this outside of any locks.
440 bos = kvmalloc_array(args->nr_bos, sizeof(*bos), GFP_KERNEL);
441 relocs = kvmalloc_array(args->nr_relocs, sizeof(*relocs), GFP_KERNEL);
442 pmrs = kvmalloc_array(args->nr_pmrs, sizeof(*pmrs), GFP_KERNEL);
443 stream = kvmalloc_array(1, args->stream_size, GFP_KERNEL);
444 if (!bos || !relocs || !pmrs || !stream) {
446 goto err_submit_cmds;
449 ret = copy_from_user(bos, u64_to_user_ptr(args->bos),
450 args->nr_bos * sizeof(*bos));
453 goto err_submit_cmds;
456 ret = copy_from_user(relocs, u64_to_user_ptr(args->relocs),
457 args->nr_relocs * sizeof(*relocs));
460 goto err_submit_cmds;
463 ret = copy_from_user(pmrs, u64_to_user_ptr(args->pmrs),
464 args->nr_pmrs * sizeof(*pmrs));
467 goto err_submit_cmds;
470 ret = copy_from_user(stream, u64_to_user_ptr(args->stream),
474 goto err_submit_cmds;
477 if (args->flags & ETNA_SUBMIT_FENCE_FD_OUT) {
478 out_fence_fd = get_unused_fd_flags(O_CLOEXEC);
479 if (out_fence_fd < 0) {
481 goto err_submit_cmds;
485 ww_acquire_init(&ticket, &reservation_ww_class);
487 submit = submit_create(dev, gpu, args->nr_bos, args->nr_pmrs);
490 goto err_submit_ww_acquire;
493 ret = etnaviv_cmdbuf_init(gpu->cmdbuf_suballoc, &submit->cmdbuf,
494 ALIGN(args->stream_size, 8) + 8);
496 goto err_submit_objects;
498 submit->ctx = file->driver_priv;
499 submit->exec_state = args->exec_state;
500 submit->flags = args->flags;
502 ret = submit_lookup_objects(submit, file, bos, args->nr_bos);
504 goto err_submit_objects;
506 if (!etnaviv_cmd_validate_one(gpu, stream, args->stream_size / 4,
507 relocs, args->nr_relocs)) {
509 goto err_submit_objects;
512 if (args->flags & ETNA_SUBMIT_FENCE_FD_IN) {
513 submit->in_fence = sync_file_get_fence(args->fence_fd);
514 if (!submit->in_fence) {
516 goto err_submit_objects;
520 ret = submit_pin_objects(submit);
522 goto err_submit_objects;
524 ret = submit_reloc(submit, stream, args->stream_size / 4,
525 relocs, args->nr_relocs);
527 goto err_submit_objects;
529 ret = submit_perfmon_validate(submit, args->exec_state, pmrs);
531 goto err_submit_objects;
533 memcpy(submit->cmdbuf.vaddr, stream, args->stream_size);
535 ret = submit_lock_objects(submit, &ticket);
537 goto err_submit_objects;
539 ret = submit_fence_sync(submit);
541 goto err_submit_objects;
543 ret = etnaviv_sched_push_job(&ctx->sched_entity[args->pipe], submit);
545 goto err_submit_objects;
547 submit_attach_object_fences(submit);
549 if (args->flags & ETNA_SUBMIT_FENCE_FD_OUT) {
551 * This can be improved: ideally we want to allocate the sync
552 * file before kicking off the GPU job and just attach the
553 * fence to the sync file here, eliminating the ENOMEM
554 * possibility at this stage.
556 sync_file = sync_file_create(submit->out_fence);
559 goto err_submit_objects;
561 fd_install(out_fence_fd, sync_file->file);
564 args->fence_fd = out_fence_fd;
565 args->fence = submit->out_fence_id;
568 etnaviv_submit_put(submit);
570 err_submit_ww_acquire:
571 ww_acquire_fini(&ticket);
574 if (ret && (out_fence_fd >= 0))
575 put_unused_fd(out_fence_fd);