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- // SPDX-License-Identifier: GPL-2.0-only
- /*
- * Copyright (C) 2015 Etnaviv Project
- */
- #include <drm/drm_file.h>
- #include <linux/dma-fence-array.h>
- #include <linux/file.h>
- #include <linux/pm_runtime.h>
- #include <linux/dma-resv.h>
- #include <linux/sync_file.h>
- #include <linux/uaccess.h>
- #include <linux/vmalloc.h>
- #include "etnaviv_cmdbuf.h"
- #include "etnaviv_drv.h"
- #include "etnaviv_gpu.h"
- #include "etnaviv_gem.h"
- #include "etnaviv_perfmon.h"
- #include "etnaviv_sched.h"
- /*
- * Cmdstream submission:
- */
- #define BO_INVALID_FLAGS ~(ETNA_SUBMIT_BO_READ | ETNA_SUBMIT_BO_WRITE)
- /* make sure these don't conflict w/ ETNAVIV_SUBMIT_BO_x */
- #define BO_LOCKED 0x4000
- #define BO_PINNED 0x2000
- static struct etnaviv_gem_submit *submit_create(struct drm_device *dev,
- struct etnaviv_gpu *gpu, size_t nr_bos, size_t nr_pmrs)
- {
- struct etnaviv_gem_submit *submit;
- size_t sz = size_vstruct(nr_bos, sizeof(submit->bos[0]), sizeof(*submit));
- submit = kzalloc(sz, GFP_KERNEL);
- if (!submit)
- return NULL;
- submit->pmrs = kcalloc(nr_pmrs, sizeof(struct etnaviv_perfmon_request),
- GFP_KERNEL);
- if (!submit->pmrs) {
- kfree(submit);
- return NULL;
- }
- submit->nr_pmrs = nr_pmrs;
- submit->gpu = gpu;
- kref_init(&submit->refcount);
- return submit;
- }
- static int submit_lookup_objects(struct etnaviv_gem_submit *submit,
- struct drm_file *file, struct drm_etnaviv_gem_submit_bo *submit_bos,
- unsigned nr_bos)
- {
- struct drm_etnaviv_gem_submit_bo *bo;
- unsigned i;
- int ret = 0;
- spin_lock(&file->table_lock);
- for (i = 0, bo = submit_bos; i < nr_bos; i++, bo++) {
- struct drm_gem_object *obj;
- if (bo->flags & BO_INVALID_FLAGS) {
- DRM_ERROR("invalid flags: %x\n", bo->flags);
- ret = -EINVAL;
- goto out_unlock;
- }
- submit->bos[i].flags = bo->flags;
- if (submit->flags & ETNA_SUBMIT_SOFTPIN) {
- if (bo->presumed < ETNAVIV_SOFTPIN_START_ADDRESS) {
- DRM_ERROR("invalid softpin address\n");
- ret = -EINVAL;
- goto out_unlock;
- }
- submit->bos[i].va = bo->presumed;
- }
- /* normally use drm_gem_object_lookup(), but for bulk lookup
- * all under single table_lock just hit object_idr directly:
- */
- obj = idr_find(&file->object_idr, bo->handle);
- if (!obj) {
- DRM_ERROR("invalid handle %u at index %u\n",
- bo->handle, i);
- ret = -EINVAL;
- goto out_unlock;
- }
- /*
- * Take a refcount on the object. The file table lock
- * prevents the object_idr's refcount on this being dropped.
- */
- drm_gem_object_get(obj);
- submit->bos[i].obj = to_etnaviv_bo(obj);
- }
- out_unlock:
- submit->nr_bos = i;
- spin_unlock(&file->table_lock);
- return ret;
- }
- static void submit_unlock_object(struct etnaviv_gem_submit *submit, int i)
- {
- if (submit->bos[i].flags & BO_LOCKED) {
- struct drm_gem_object *obj = &submit->bos[i].obj->base;
- dma_resv_unlock(obj->resv);
- submit->bos[i].flags &= ~BO_LOCKED;
- }
- }
- static int submit_lock_objects(struct etnaviv_gem_submit *submit,
- struct ww_acquire_ctx *ticket)
- {
- int contended, slow_locked = -1, i, ret = 0;
- retry:
- for (i = 0; i < submit->nr_bos; i++) {
- struct drm_gem_object *obj = &submit->bos[i].obj->base;
- if (slow_locked == i)
- slow_locked = -1;
- contended = i;
- if (!(submit->bos[i].flags & BO_LOCKED)) {
- ret = dma_resv_lock_interruptible(obj->resv, ticket);
- if (ret == -EALREADY)
- DRM_ERROR("BO at index %u already on submit list\n",
- i);
- if (ret)
- goto fail;
- submit->bos[i].flags |= BO_LOCKED;
- }
- }
- ww_acquire_done(ticket);
- return 0;
- fail:
- for (; i >= 0; i--)
- submit_unlock_object(submit, i);
- if (slow_locked > 0)
- submit_unlock_object(submit, slow_locked);
- if (ret == -EDEADLK) {
- struct drm_gem_object *obj;
- obj = &submit->bos[contended].obj->base;
- /* we lost out in a seqno race, lock and retry.. */
- ret = dma_resv_lock_slow_interruptible(obj->resv, ticket);
- if (!ret) {
- submit->bos[contended].flags |= BO_LOCKED;
- slow_locked = contended;
- goto retry;
- }
- }
- return ret;
- }
- static int submit_fence_sync(struct etnaviv_gem_submit *submit)
- {
- int i, ret = 0;
- for (i = 0; i < submit->nr_bos; i++) {
- struct etnaviv_gem_submit_bo *bo = &submit->bos[i];
- struct dma_resv *robj = bo->obj->base.resv;
- if (!(bo->flags & ETNA_SUBMIT_BO_WRITE)) {
- ret = dma_resv_reserve_shared(robj, 1);
- if (ret)
- return ret;
- }
- if (submit->flags & ETNA_SUBMIT_NO_IMPLICIT)
- continue;
- if (bo->flags & ETNA_SUBMIT_BO_WRITE) {
- ret = dma_resv_get_fences_rcu(robj, &bo->excl,
- &bo->nr_shared,
- &bo->shared);
- if (ret)
- return ret;
- } else {
- bo->excl = dma_resv_get_excl_rcu(robj);
- }
- }
- return ret;
- }
- static void submit_attach_object_fences(struct etnaviv_gem_submit *submit)
- {
- int i;
- for (i = 0; i < submit->nr_bos; i++) {
- struct drm_gem_object *obj = &submit->bos[i].obj->base;
- if (submit->bos[i].flags & ETNA_SUBMIT_BO_WRITE)
- dma_resv_add_excl_fence(obj->resv,
- submit->out_fence);
- else
- dma_resv_add_shared_fence(obj->resv,
- submit->out_fence);
- submit_unlock_object(submit, i);
- }
- }
- static int submit_pin_objects(struct etnaviv_gem_submit *submit)
- {
- int i, ret = 0;
- for (i = 0; i < submit->nr_bos; i++) {
- struct etnaviv_gem_object *etnaviv_obj = submit->bos[i].obj;
- struct etnaviv_vram_mapping *mapping;
- mapping = etnaviv_gem_mapping_get(&etnaviv_obj->base,
- submit->mmu_context,
- submit->bos[i].va);
- if (IS_ERR(mapping)) {
- ret = PTR_ERR(mapping);
- break;
- }
- if ((submit->flags & ETNA_SUBMIT_SOFTPIN) &&
- submit->bos[i].va != mapping->iova) {
- etnaviv_gem_mapping_unreference(mapping);
- return -EINVAL;
- }
- atomic_inc(&etnaviv_obj->gpu_active);
- submit->bos[i].flags |= BO_PINNED;
- submit->bos[i].mapping = mapping;
- }
- return ret;
- }
- static int submit_bo(struct etnaviv_gem_submit *submit, u32 idx,
- struct etnaviv_gem_submit_bo **bo)
- {
- if (idx >= submit->nr_bos) {
- DRM_ERROR("invalid buffer index: %u (out of %u)\n",
- idx, submit->nr_bos);
- return -EINVAL;
- }
- *bo = &submit->bos[idx];
- return 0;
- }
- /* process the reloc's and patch up the cmdstream as needed: */
- static int submit_reloc(struct etnaviv_gem_submit *submit, void *stream,
- u32 size, const struct drm_etnaviv_gem_submit_reloc *relocs,
- u32 nr_relocs)
- {
- u32 i, last_offset = 0;
- u32 *ptr = stream;
- int ret;
- /* Submits using softpin don't blend with relocs */
- if ((submit->flags & ETNA_SUBMIT_SOFTPIN) && nr_relocs != 0)
- return -EINVAL;
- for (i = 0; i < nr_relocs; i++) {
- const struct drm_etnaviv_gem_submit_reloc *r = relocs + i;
- struct etnaviv_gem_submit_bo *bo;
- u32 off;
- if (unlikely(r->flags)) {
- DRM_ERROR("invalid reloc flags\n");
- return -EINVAL;
- }
- if (r->submit_offset % 4) {
- DRM_ERROR("non-aligned reloc offset: %u\n",
- r->submit_offset);
- return -EINVAL;
- }
- /* offset in dwords: */
- off = r->submit_offset / 4;
- if ((off >= size ) ||
- (off < last_offset)) {
- DRM_ERROR("invalid offset %u at reloc %u\n", off, i);
- return -EINVAL;
- }
- ret = submit_bo(submit, r->reloc_idx, &bo);
- if (ret)
- return ret;
- if (r->reloc_offset > bo->obj->base.size - sizeof(*ptr)) {
- DRM_ERROR("relocation %u outside object\n", i);
- return -EINVAL;
- }
- ptr[off] = bo->mapping->iova + r->reloc_offset;
- last_offset = off;
- }
- return 0;
- }
- static int submit_perfmon_validate(struct etnaviv_gem_submit *submit,
- u32 exec_state, const struct drm_etnaviv_gem_submit_pmr *pmrs)
- {
- u32 i;
- for (i = 0; i < submit->nr_pmrs; i++) {
- const struct drm_etnaviv_gem_submit_pmr *r = pmrs + i;
- struct etnaviv_gem_submit_bo *bo;
- int ret;
- ret = submit_bo(submit, r->read_idx, &bo);
- if (ret)
- return ret;
- /* at offset 0 a sequence number gets stored used for userspace sync */
- if (r->read_offset == 0) {
- DRM_ERROR("perfmon request: offset is 0");
- return -EINVAL;
- }
- if (r->read_offset >= bo->obj->base.size - sizeof(u32)) {
- DRM_ERROR("perfmon request: offset %u outside object", i);
- return -EINVAL;
- }
- if (r->flags & ~(ETNA_PM_PROCESS_PRE | ETNA_PM_PROCESS_POST)) {
- DRM_ERROR("perfmon request: flags are not valid");
- return -EINVAL;
- }
- if (etnaviv_pm_req_validate(r, exec_state)) {
- DRM_ERROR("perfmon request: domain or signal not valid");
- return -EINVAL;
- }
- submit->pmrs[i].flags = r->flags;
- submit->pmrs[i].domain = r->domain;
- submit->pmrs[i].signal = r->signal;
- submit->pmrs[i].sequence = r->sequence;
- submit->pmrs[i].offset = r->read_offset;
- submit->pmrs[i].bo_vma = etnaviv_gem_vmap(&bo->obj->base);
- }
- return 0;
- }
- static void submit_cleanup(struct kref *kref)
- {
- struct etnaviv_gem_submit *submit =
- container_of(kref, struct etnaviv_gem_submit, refcount);
- unsigned i;
- if (submit->runtime_resumed)
- pm_runtime_put_autosuspend(submit->gpu->dev);
- if (submit->cmdbuf.suballoc)
- etnaviv_cmdbuf_free(&submit->cmdbuf);
- if (submit->mmu_context)
- etnaviv_iommu_context_put(submit->mmu_context);
- if (submit->prev_mmu_context)
- etnaviv_iommu_context_put(submit->prev_mmu_context);
- for (i = 0; i < submit->nr_bos; i++) {
- struct etnaviv_gem_object *etnaviv_obj = submit->bos[i].obj;
- /* unpin all objects */
- if (submit->bos[i].flags & BO_PINNED) {
- etnaviv_gem_mapping_unreference(submit->bos[i].mapping);
- atomic_dec(&etnaviv_obj->gpu_active);
- submit->bos[i].mapping = NULL;
- submit->bos[i].flags &= ~BO_PINNED;
- }
- /* if the GPU submit failed, objects might still be locked */
- submit_unlock_object(submit, i);
- drm_gem_object_put(&etnaviv_obj->base);
- }
- wake_up_all(&submit->gpu->fence_event);
- if (submit->in_fence)
- dma_fence_put(submit->in_fence);
- if (submit->out_fence) {
- /* first remove from IDR, so fence can not be found anymore */
- mutex_lock(&submit->gpu->fence_lock);
- idr_remove(&submit->gpu->fence_idr, submit->out_fence_id);
- mutex_unlock(&submit->gpu->fence_lock);
- dma_fence_put(submit->out_fence);
- }
- kfree(submit->pmrs);
- kfree(submit);
- }
- void etnaviv_submit_put(struct etnaviv_gem_submit *submit)
- {
- kref_put(&submit->refcount, submit_cleanup);
- }
- int etnaviv_ioctl_gem_submit(struct drm_device *dev, void *data,
- struct drm_file *file)
- {
- struct etnaviv_file_private *ctx = file->driver_priv;
- struct etnaviv_drm_private *priv = dev->dev_private;
- struct drm_etnaviv_gem_submit *args = data;
- struct drm_etnaviv_gem_submit_reloc *relocs;
- struct drm_etnaviv_gem_submit_pmr *pmrs;
- struct drm_etnaviv_gem_submit_bo *bos;
- struct etnaviv_gem_submit *submit;
- struct etnaviv_gpu *gpu;
- struct sync_file *sync_file = NULL;
- struct ww_acquire_ctx ticket;
- int out_fence_fd = -1;
- void *stream;
- int ret;
- if (args->pipe >= ETNA_MAX_PIPES)
- return -EINVAL;
- gpu = priv->gpu[args->pipe];
- if (!gpu)
- return -ENXIO;
- if (args->stream_size % 4) {
- DRM_ERROR("non-aligned cmdstream buffer size: %u\n",
- args->stream_size);
- return -EINVAL;
- }
- if (args->exec_state != ETNA_PIPE_3D &&
- args->exec_state != ETNA_PIPE_2D &&
- args->exec_state != ETNA_PIPE_VG) {
- DRM_ERROR("invalid exec_state: 0x%x\n", args->exec_state);
- return -EINVAL;
- }
- if (args->flags & ~ETNA_SUBMIT_FLAGS) {
- DRM_ERROR("invalid flags: 0x%x\n", args->flags);
- return -EINVAL;
- }
- if ((args->flags & ETNA_SUBMIT_SOFTPIN) &&
- priv->mmu_global->version != ETNAVIV_IOMMU_V2) {
- DRM_ERROR("softpin requested on incompatible MMU\n");
- return -EINVAL;
- }
- if (args->stream_size > SZ_128K || args->nr_relocs > SZ_128K ||
- args->nr_bos > SZ_128K || args->nr_pmrs > 128) {
- DRM_ERROR("submit arguments out of size limits\n");
- return -EINVAL;
- }
- /*
- * Copy the command submission and bo array to kernel space in
- * one go, and do this outside of any locks.
- */
- bos = kvmalloc_array(args->nr_bos, sizeof(*bos), GFP_KERNEL);
- relocs = kvmalloc_array(args->nr_relocs, sizeof(*relocs), GFP_KERNEL);
- pmrs = kvmalloc_array(args->nr_pmrs, sizeof(*pmrs), GFP_KERNEL);
- stream = kvmalloc_array(1, args->stream_size, GFP_KERNEL);
- if (!bos || !relocs || !pmrs || !stream) {
- ret = -ENOMEM;
- goto err_submit_cmds;
- }
- ret = copy_from_user(bos, u64_to_user_ptr(args->bos),
- args->nr_bos * sizeof(*bos));
- if (ret) {
- ret = -EFAULT;
- goto err_submit_cmds;
- }
- ret = copy_from_user(relocs, u64_to_user_ptr(args->relocs),
- args->nr_relocs * sizeof(*relocs));
- if (ret) {
- ret = -EFAULT;
- goto err_submit_cmds;
- }
- ret = copy_from_user(pmrs, u64_to_user_ptr(args->pmrs),
- args->nr_pmrs * sizeof(*pmrs));
- if (ret) {
- ret = -EFAULT;
- goto err_submit_cmds;
- }
- ret = copy_from_user(stream, u64_to_user_ptr(args->stream),
- args->stream_size);
- if (ret) {
- ret = -EFAULT;
- goto err_submit_cmds;
- }
- if (args->flags & ETNA_SUBMIT_FENCE_FD_OUT) {
- out_fence_fd = get_unused_fd_flags(O_CLOEXEC);
- if (out_fence_fd < 0) {
- ret = out_fence_fd;
- goto err_submit_cmds;
- }
- }
- ww_acquire_init(&ticket, &reservation_ww_class);
- submit = submit_create(dev, gpu, args->nr_bos, args->nr_pmrs);
- if (!submit) {
- ret = -ENOMEM;
- goto err_submit_ww_acquire;
- }
- ret = etnaviv_cmdbuf_init(priv->cmdbuf_suballoc, &submit->cmdbuf,
- ALIGN(args->stream_size, 8) + 8);
- if (ret)
- goto err_submit_objects;
- submit->ctx = file->driver_priv;
- submit->mmu_context = etnaviv_iommu_context_get(submit->ctx->mmu);
- submit->exec_state = args->exec_state;
- submit->flags = args->flags;
- ret = submit_lookup_objects(submit, file, bos, args->nr_bos);
- if (ret)
- goto err_submit_objects;
- if ((priv->mmu_global->version != ETNAVIV_IOMMU_V2) &&
- !etnaviv_cmd_validate_one(gpu, stream, args->stream_size / 4,
- relocs, args->nr_relocs)) {
- ret = -EINVAL;
- goto err_submit_objects;
- }
- if (args->flags & ETNA_SUBMIT_FENCE_FD_IN) {
- submit->in_fence = sync_file_get_fence(args->fence_fd);
- if (!submit->in_fence) {
- ret = -EINVAL;
- goto err_submit_objects;
- }
- }
- ret = submit_pin_objects(submit);
- if (ret)
- goto err_submit_objects;
- ret = submit_reloc(submit, stream, args->stream_size / 4,
- relocs, args->nr_relocs);
- if (ret)
- goto err_submit_objects;
- ret = submit_perfmon_validate(submit, args->exec_state, pmrs);
- if (ret)
- goto err_submit_objects;
- memcpy(submit->cmdbuf.vaddr, stream, args->stream_size);
- ret = submit_lock_objects(submit, &ticket);
- if (ret)
- goto err_submit_objects;
- ret = submit_fence_sync(submit);
- if (ret)
- goto err_submit_objects;
- ret = etnaviv_sched_push_job(&ctx->sched_entity[args->pipe], submit);
- if (ret)
- goto err_submit_objects;
- submit_attach_object_fences(submit);
- if (args->flags & ETNA_SUBMIT_FENCE_FD_OUT) {
- /*
- * This can be improved: ideally we want to allocate the sync
- * file before kicking off the GPU job and just attach the
- * fence to the sync file here, eliminating the ENOMEM
- * possibility at this stage.
- */
- sync_file = sync_file_create(submit->out_fence);
- if (!sync_file) {
- ret = -ENOMEM;
- goto err_submit_objects;
- }
- fd_install(out_fence_fd, sync_file->file);
- }
- args->fence_fd = out_fence_fd;
- args->fence = submit->out_fence_id;
- err_submit_objects:
- etnaviv_submit_put(submit);
- err_submit_ww_acquire:
- ww_acquire_fini(&ticket);
- err_submit_cmds:
- if (ret && (out_fence_fd >= 0))
- put_unused_fd(out_fence_fd);
- if (stream)
- kvfree(stream);
- if (bos)
- kvfree(bos);
- if (relocs)
- kvfree(relocs);
- if (pmrs)
- kvfree(pmrs);
- return ret;
- }
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