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1// SPDX-License-Identifier: GPL-2.0-only2/*3 * Copyright (C) 2015 Etnaviv Project4 */5 6#include <drm/drm_file.h>7#include <linux/dma-fence-array.h>8#include <linux/file.h>9#include <linux/pm_runtime.h>10#include <linux/dma-resv.h>11#include <linux/sync_file.h>12#include <linux/uaccess.h>13#include <linux/vmalloc.h>14 15#include "etnaviv_cmdbuf.h"16#include "etnaviv_drv.h"17#include "etnaviv_gpu.h"18#include "etnaviv_gem.h"19#include "etnaviv_perfmon.h"20#include "etnaviv_sched.h"21 22/*23 * Cmdstream submission:24 */25 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 0x400029#define BO_PINNED 0x200030 31static struct etnaviv_gem_submit *submit_create(struct drm_device *dev,32 struct etnaviv_gpu *gpu, size_t nr_bos, size_t nr_pmrs)33{34 struct etnaviv_gem_submit *submit;35 size_t sz = size_vstruct(nr_bos, sizeof(submit->bos[0]), sizeof(*submit));36 37 submit = kzalloc(sz, GFP_KERNEL);38 if (!submit)39 return NULL;40 41 submit->pmrs = kcalloc(nr_pmrs, sizeof(struct etnaviv_perfmon_request),42 GFP_KERNEL);43 if (!submit->pmrs) {44 kfree(submit);45 return NULL;46 }47 submit->nr_pmrs = nr_pmrs;48 49 submit->gpu = gpu;50 kref_init(&submit->refcount);51 52 return submit;53}54 55static int submit_lookup_objects(struct etnaviv_gem_submit *submit,56 struct drm_file *file, struct drm_etnaviv_gem_submit_bo *submit_bos,57 unsigned nr_bos)58{59 struct drm_etnaviv_gem_submit_bo *bo;60 unsigned i;61 int ret = 0;62 63 spin_lock(&file->table_lock);64 65 for (i = 0, bo = submit_bos; i < nr_bos; i++, bo++) {66 struct drm_gem_object *obj;67 68 if (bo->flags & BO_INVALID_FLAGS) {69 DRM_ERROR("invalid flags: %x\n", bo->flags);70 ret = -EINVAL;71 goto out_unlock;72 }73 74 submit->bos[i].flags = bo->flags;75 if (submit->flags & ETNA_SUBMIT_SOFTPIN) {76 if (bo->presumed < ETNAVIV_SOFTPIN_START_ADDRESS) {77 DRM_ERROR("invalid softpin address\n");78 ret = -EINVAL;79 goto out_unlock;80 }81 submit->bos[i].va = bo->presumed;82 }83 84 /* normally use drm_gem_object_lookup(), but for bulk lookup85 * all under single table_lock just hit object_idr directly:86 */87 obj = idr_find(&file->object_idr, bo->handle);88 if (!obj) {89 DRM_ERROR("invalid handle %u at index %u\n",90 bo->handle, i);91 ret = -EINVAL;92 goto out_unlock;93 }94 95 /*96 * Take a refcount on the object. The file table lock97 * prevents the object_idr's refcount on this being dropped.98 */99 drm_gem_object_get(obj);100 101 submit->bos[i].obj = to_etnaviv_bo(obj);102 }103 104out_unlock:105 submit->nr_bos = i;106 spin_unlock(&file->table_lock);107 108 return ret;109}110 111static void submit_unlock_object(struct etnaviv_gem_submit *submit, int i)112{113 if (submit->bos[i].flags & BO_LOCKED) {114 struct drm_gem_object *obj = &submit->bos[i].obj->base;115 116 dma_resv_unlock(obj->resv);117 submit->bos[i].flags &= ~BO_LOCKED;118 }119}120 121static int submit_lock_objects(struct etnaviv_gem_submit *submit,122 struct ww_acquire_ctx *ticket)123{124 int contended, slow_locked = -1, i, ret = 0;125 126retry:127 for (i = 0; i < submit->nr_bos; i++) {128 struct drm_gem_object *obj = &submit->bos[i].obj->base;129 130 if (slow_locked == i)131 slow_locked = -1;132 133 contended = i;134 135 if (!(submit->bos[i].flags & BO_LOCKED)) {136 ret = dma_resv_lock_interruptible(obj->resv, ticket);137 if (ret == -EALREADY)138 DRM_ERROR("BO at index %u already on submit list\n",139 i);140 if (ret)141 goto fail;142 submit->bos[i].flags |= BO_LOCKED;143 }144 }145 146 ww_acquire_done(ticket);147 148 return 0;149 150fail:151 for (; i >= 0; i--)152 submit_unlock_object(submit, i);153 154 if (slow_locked > 0)155 submit_unlock_object(submit, slow_locked);156 157 if (ret == -EDEADLK) {158 struct drm_gem_object *obj;159 160 obj = &submit->bos[contended].obj->base;161 162 /* we lost out in a seqno race, lock and retry.. */163 ret = dma_resv_lock_slow_interruptible(obj->resv, ticket);164 if (!ret) {165 submit->bos[contended].flags |= BO_LOCKED;166 slow_locked = contended;167 goto retry;168 }169 }170 171 return ret;172}173 174static int submit_fence_sync(struct etnaviv_gem_submit *submit)175{176 int i, ret = 0;177 178 for (i = 0; i < submit->nr_bos; i++) {179 struct etnaviv_gem_submit_bo *bo = &submit->bos[i];180 struct dma_resv *robj = bo->obj->base.resv;181 182 ret = dma_resv_reserve_fences(robj, 1);183 if (ret)184 return ret;185 186 if (submit->flags & ETNA_SUBMIT_NO_IMPLICIT)187 continue;188 189 ret = drm_sched_job_add_implicit_dependencies(&submit->sched_job,190 &bo->obj->base,191 bo->flags & ETNA_SUBMIT_BO_WRITE);192 if (ret)193 return ret;194 }195 196 return ret;197}198 199static void submit_attach_object_fences(struct etnaviv_gem_submit *submit)200{201 int i;202 203 for (i = 0; i < submit->nr_bos; i++) {204 struct drm_gem_object *obj = &submit->bos[i].obj->base;205 bool write = submit->bos[i].flags & ETNA_SUBMIT_BO_WRITE;206 207 dma_resv_add_fence(obj->resv, submit->out_fence, write ?208 DMA_RESV_USAGE_WRITE : DMA_RESV_USAGE_READ);209 submit_unlock_object(submit, i);210 }211}212 213static int submit_pin_objects(struct etnaviv_gem_submit *submit)214{215 int i, ret = 0;216 217 for (i = 0; i < submit->nr_bos; i++) {218 struct etnaviv_gem_object *etnaviv_obj = submit->bos[i].obj;219 struct etnaviv_vram_mapping *mapping;220 221 mapping = etnaviv_gem_mapping_get(&etnaviv_obj->base,222 submit->mmu_context,223 submit->bos[i].va);224 if (IS_ERR(mapping)) {225 ret = PTR_ERR(mapping);226 break;227 }228 229 if ((submit->flags & ETNA_SUBMIT_SOFTPIN) &&230 submit->bos[i].va != mapping->iova) {231 etnaviv_gem_mapping_unreference(mapping);232 return -EINVAL;233 }234 235 atomic_inc(&etnaviv_obj->gpu_active);236 237 submit->bos[i].flags |= BO_PINNED;238 submit->bos[i].mapping = mapping;239 }240 241 return ret;242}243 244static int submit_bo(struct etnaviv_gem_submit *submit, u32 idx,245 struct etnaviv_gem_submit_bo **bo)246{247 if (idx >= submit->nr_bos) {248 DRM_ERROR("invalid buffer index: %u (out of %u)\n",249 idx, submit->nr_bos);250 return -EINVAL;251 }252 253 *bo = &submit->bos[idx];254 255 return 0;256}257 258/* process the reloc's and patch up the cmdstream as needed: */259static int submit_reloc(struct etnaviv_gem_submit *submit, void *stream,260 u32 size, const struct drm_etnaviv_gem_submit_reloc *relocs,261 u32 nr_relocs)262{263 u32 i, last_offset = 0;264 u32 *ptr = stream;265 int ret;266 267 /* Submits using softpin don't blend with relocs */268 if ((submit->flags & ETNA_SUBMIT_SOFTPIN) && nr_relocs != 0)269 return -EINVAL;270 271 for (i = 0; i < nr_relocs; i++) {272 const struct drm_etnaviv_gem_submit_reloc *r = relocs + i;273 struct etnaviv_gem_submit_bo *bo;274 u32 off;275 276 if (unlikely(r->flags)) {277 DRM_ERROR("invalid reloc flags\n");278 return -EINVAL;279 }280 281 if (r->submit_offset % 4) {282 DRM_ERROR("non-aligned reloc offset: %u\n",283 r->submit_offset);284 return -EINVAL;285 }286 287 /* offset in dwords: */288 off = r->submit_offset / 4;289 290 if ((off >= size ) ||291 (off < last_offset)) {292 DRM_ERROR("invalid offset %u at reloc %u\n", off, i);293 return -EINVAL;294 }295 296 ret = submit_bo(submit, r->reloc_idx, &bo);297 if (ret)298 return ret;299 300 if (r->reloc_offset > bo->obj->base.size - sizeof(*ptr)) {301 DRM_ERROR("relocation %u outside object\n", i);302 return -EINVAL;303 }304 305 ptr[off] = bo->mapping->iova + r->reloc_offset;306 307 last_offset = off;308 }309 310 return 0;311}312 313static int submit_perfmon_validate(struct etnaviv_gem_submit *submit,314 u32 exec_state, const struct drm_etnaviv_gem_submit_pmr *pmrs)315{316 u32 i;317 318 for (i = 0; i < submit->nr_pmrs; i++) {319 const struct drm_etnaviv_gem_submit_pmr *r = pmrs + i;320 struct etnaviv_gem_submit_bo *bo;321 int ret;322 323 ret = submit_bo(submit, r->read_idx, &bo);324 if (ret)325 return ret;326 327 /* at offset 0 a sequence number gets stored used for userspace sync */328 if (r->read_offset == 0) {329 DRM_ERROR("perfmon request: offset is 0");330 return -EINVAL;331 }332 333 if (r->read_offset >= bo->obj->base.size - sizeof(u32)) {334 DRM_ERROR("perfmon request: offset %u outside object", i);335 return -EINVAL;336 }337 338 if (r->flags & ~(ETNA_PM_PROCESS_PRE | ETNA_PM_PROCESS_POST)) {339 DRM_ERROR("perfmon request: flags are not valid");340 return -EINVAL;341 }342 343 if (etnaviv_pm_req_validate(r, exec_state)) {344 DRM_ERROR("perfmon request: domain or signal not valid");345 return -EINVAL;346 }347 348 submit->pmrs[i].flags = r->flags;349 submit->pmrs[i].domain = r->domain;350 submit->pmrs[i].signal = r->signal;351 submit->pmrs[i].sequence = r->sequence;352 submit->pmrs[i].offset = r->read_offset;353 submit->pmrs[i].bo_vma = etnaviv_gem_vmap(&bo->obj->base);354 }355 356 return 0;357}358 359static void submit_cleanup(struct kref *kref)360{361 struct etnaviv_gem_submit *submit =362 container_of(kref, struct etnaviv_gem_submit, refcount);363 unsigned i;364 365 if (submit->cmdbuf.suballoc)366 etnaviv_cmdbuf_free(&submit->cmdbuf);367 368 if (submit->mmu_context)369 etnaviv_iommu_context_put(submit->mmu_context);370 371 if (submit->prev_mmu_context)372 etnaviv_iommu_context_put(submit->prev_mmu_context);373 374 for (i = 0; i < submit->nr_bos; i++) {375 struct etnaviv_gem_object *etnaviv_obj = submit->bos[i].obj;376 377 /* unpin all objects */378 if (submit->bos[i].flags & BO_PINNED) {379 etnaviv_gem_mapping_unreference(submit->bos[i].mapping);380 atomic_dec(&etnaviv_obj->gpu_active);381 submit->bos[i].mapping = NULL;382 submit->bos[i].flags &= ~BO_PINNED;383 }384 385 /* if the GPU submit failed, objects might still be locked */386 submit_unlock_object(submit, i);387 drm_gem_object_put(&etnaviv_obj->base);388 }389 390 wake_up_all(&submit->gpu->fence_event);391 392 if (submit->out_fence) {393 /*394 * Remove from user fence array before dropping the reference,395 * so fence can not be found in lookup anymore.396 */397 xa_erase(&submit->gpu->user_fences, submit->out_fence_id);398 dma_fence_put(submit->out_fence);399 }400 401 put_pid(submit->pid);402 403 kfree(submit->pmrs);404 kfree(submit);405}406 407void etnaviv_submit_put(struct etnaviv_gem_submit *submit)408{409 kref_put(&submit->refcount, submit_cleanup);410}411 412int etnaviv_ioctl_gem_submit(struct drm_device *dev, void *data,413 struct drm_file *file)414{415 struct etnaviv_file_private *ctx = file->driver_priv;416 struct etnaviv_drm_private *priv = dev->dev_private;417 struct drm_etnaviv_gem_submit *args = data;418 struct drm_etnaviv_gem_submit_reloc *relocs;419 struct drm_etnaviv_gem_submit_pmr *pmrs;420 struct drm_etnaviv_gem_submit_bo *bos;421 struct etnaviv_gem_submit *submit;422 struct etnaviv_gpu *gpu;423 struct sync_file *sync_file = NULL;424 struct ww_acquire_ctx ticket;425 int out_fence_fd = -1;426 struct pid *pid = get_pid(task_pid(current));427 void *stream;428 int ret;429 430 if (args->pipe >= ETNA_MAX_PIPES)431 return -EINVAL;432 433 gpu = priv->gpu[args->pipe];434 if (!gpu)435 return -ENXIO;436 437 if (args->stream_size % 4) {438 DRM_ERROR("non-aligned cmdstream buffer size: %u\n",439 args->stream_size);440 return -EINVAL;441 }442 443 if (args->exec_state != ETNA_PIPE_3D &&444 args->exec_state != ETNA_PIPE_2D &&445 args->exec_state != ETNA_PIPE_VG) {446 DRM_ERROR("invalid exec_state: 0x%x\n", args->exec_state);447 return -EINVAL;448 }449 450 if (args->flags & ~ETNA_SUBMIT_FLAGS) {451 DRM_ERROR("invalid flags: 0x%x\n", args->flags);452 return -EINVAL;453 }454 455 if ((args->flags & ETNA_SUBMIT_SOFTPIN) &&456 priv->mmu_global->version != ETNAVIV_IOMMU_V2) {457 DRM_ERROR("softpin requested on incompatible MMU\n");458 return -EINVAL;459 }460 461 if (args->stream_size > SZ_128K || args->nr_relocs > SZ_128K ||462 args->nr_bos > SZ_128K || args->nr_pmrs > 128) {463 DRM_ERROR("submit arguments out of size limits\n");464 return -EINVAL;465 }466 467 /*468 * Copy the command submission and bo array to kernel space in469 * one go, and do this outside of any locks.470 */471 bos = kvmalloc_array(args->nr_bos, sizeof(*bos), GFP_KERNEL);472 relocs = kvmalloc_array(args->nr_relocs, sizeof(*relocs), GFP_KERNEL);473 pmrs = kvmalloc_array(args->nr_pmrs, sizeof(*pmrs), GFP_KERNEL);474 stream = kvmalloc_array(1, args->stream_size, GFP_KERNEL);475 if (!bos || !relocs || !pmrs || !stream) {476 ret = -ENOMEM;477 goto err_submit_cmds;478 }479 480 ret = copy_from_user(bos, u64_to_user_ptr(args->bos),481 args->nr_bos * sizeof(*bos));482 if (ret) {483 ret = -EFAULT;484 goto err_submit_cmds;485 }486 487 ret = copy_from_user(relocs, u64_to_user_ptr(args->relocs),488 args->nr_relocs * sizeof(*relocs));489 if (ret) {490 ret = -EFAULT;491 goto err_submit_cmds;492 }493 494 ret = copy_from_user(pmrs, u64_to_user_ptr(args->pmrs),495 args->nr_pmrs * sizeof(*pmrs));496 if (ret) {497 ret = -EFAULT;498 goto err_submit_cmds;499 }500 501 ret = copy_from_user(stream, u64_to_user_ptr(args->stream),502 args->stream_size);503 if (ret) {504 ret = -EFAULT;505 goto err_submit_cmds;506 }507 508 if (args->flags & ETNA_SUBMIT_FENCE_FD_OUT) {509 out_fence_fd = get_unused_fd_flags(O_CLOEXEC);510 if (out_fence_fd < 0) {511 ret = out_fence_fd;512 goto err_submit_cmds;513 }514 }515 516 ww_acquire_init(&ticket, &reservation_ww_class);517 518 submit = submit_create(dev, gpu, args->nr_bos, args->nr_pmrs);519 if (!submit) {520 ret = -ENOMEM;521 goto err_submit_ww_acquire;522 }523 524 submit->pid = pid;525 526 ret = etnaviv_cmdbuf_init(priv->cmdbuf_suballoc, &submit->cmdbuf,527 ALIGN(args->stream_size, 8) + 8);528 if (ret)529 goto err_submit_put;530 531 submit->ctx = file->driver_priv;532 submit->mmu_context = etnaviv_iommu_context_get(submit->ctx->mmu);533 submit->exec_state = args->exec_state;534 submit->flags = args->flags;535 536 ret = drm_sched_job_init(&submit->sched_job,537 &ctx->sched_entity[args->pipe],538 1, submit->ctx);539 if (ret)540 goto err_submit_put;541 542 ret = submit_lookup_objects(submit, file, bos, args->nr_bos);543 if (ret)544 goto err_submit_job;545 546 if ((priv->mmu_global->version != ETNAVIV_IOMMU_V2) &&547 !etnaviv_cmd_validate_one(gpu, stream, args->stream_size / 4,548 relocs, args->nr_relocs)) {549 ret = -EINVAL;550 goto err_submit_job;551 }552 553 if (args->flags & ETNA_SUBMIT_FENCE_FD_IN) {554 struct dma_fence *in_fence = sync_file_get_fence(args->fence_fd);555 if (!in_fence) {556 ret = -EINVAL;557 goto err_submit_job;558 }559 560 ret = drm_sched_job_add_dependency(&submit->sched_job,561 in_fence);562 if (ret)563 goto err_submit_job;564 }565 566 ret = submit_pin_objects(submit);567 if (ret)568 goto err_submit_job;569 570 ret = submit_reloc(submit, stream, args->stream_size / 4,571 relocs, args->nr_relocs);572 if (ret)573 goto err_submit_job;574 575 ret = submit_perfmon_validate(submit, args->exec_state, pmrs);576 if (ret)577 goto err_submit_job;578 579 memcpy(submit->cmdbuf.vaddr, stream, args->stream_size);580 581 ret = submit_lock_objects(submit, &ticket);582 if (ret)583 goto err_submit_job;584 585 ret = submit_fence_sync(submit);586 if (ret)587 goto err_submit_job;588 589 ret = etnaviv_sched_push_job(submit);590 if (ret)591 goto err_submit_job;592 593 submit_attach_object_fences(submit);594 595 if (args->flags & ETNA_SUBMIT_FENCE_FD_OUT) {596 /*597 * This can be improved: ideally we want to allocate the sync598 * file before kicking off the GPU job and just attach the599 * fence to the sync file here, eliminating the ENOMEM600 * possibility at this stage.601 */602 sync_file = sync_file_create(submit->out_fence);603 if (!sync_file) {604 ret = -ENOMEM;605 /*606 * When this late error is hit, the submit has already607 * been handed over to the scheduler. At this point608 * the sched_job must not be cleaned up.609 */610 goto err_submit_put;611 }612 fd_install(out_fence_fd, sync_file->file);613 }614 615 args->fence_fd = out_fence_fd;616 args->fence = submit->out_fence_id;617 618err_submit_job:619 if (ret)620 drm_sched_job_cleanup(&submit->sched_job);621err_submit_put:622 etnaviv_submit_put(submit);623 624err_submit_ww_acquire:625 ww_acquire_fini(&ticket);626 627err_submit_cmds:628 if (ret && (out_fence_fd >= 0))629 put_unused_fd(out_fence_fd);630 kvfree(stream);631 kvfree(bos);632 kvfree(relocs);633 kvfree(pmrs);634 635 return ret;636}637