From ace9429bb58fd418f0c81d4c2835699bddf6bde6 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Thu, 11 Apr 2024 10:27:49 +0200 Subject: Adding upstream version 6.6.15. Signed-off-by: Daniel Baumann --- drivers/gpu/drm/etnaviv/etnaviv_gem_submit.c | 636 +++++++++++++++++++++++++++ 1 file changed, 636 insertions(+) create mode 100644 drivers/gpu/drm/etnaviv/etnaviv_gem_submit.c (limited to 'drivers/gpu/drm/etnaviv/etnaviv_gem_submit.c') diff --git a/drivers/gpu/drm/etnaviv/etnaviv_gem_submit.c b/drivers/gpu/drm/etnaviv/etnaviv_gem_submit.c new file mode 100644 index 000000000..2416c526f --- /dev/null +++ b/drivers/gpu/drm/etnaviv/etnaviv_gem_submit.c @@ -0,0 +1,636 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (C) 2015 Etnaviv Project + */ + +#include +#include +#include +#include +#include +#include +#include +#include + +#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; + + ret = dma_resv_reserve_fences(robj, 1); + if (ret) + return ret; + + if (submit->flags & ETNA_SUBMIT_NO_IMPLICIT) + continue; + + ret = drm_sched_job_add_implicit_dependencies(&submit->sched_job, + &bo->obj->base, + bo->flags & ETNA_SUBMIT_BO_WRITE); + if (ret) + return ret; + } + + 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; + bool write = submit->bos[i].flags & ETNA_SUBMIT_BO_WRITE; + + dma_resv_add_fence(obj->resv, submit->out_fence, write ? + DMA_RESV_USAGE_WRITE : DMA_RESV_USAGE_READ); + 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->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->out_fence) { + /* + * Remove from user fence array before dropping the reference, + * so fence can not be found in lookup anymore. + */ + xa_erase(&submit->gpu->user_fences, submit->out_fence_id); + dma_fence_put(submit->out_fence); + } + + put_pid(submit->pid); + + 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; + struct pid *pid = get_pid(task_pid(current)); + 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; + } + + submit->pid = pid; + + ret = etnaviv_cmdbuf_init(priv->cmdbuf_suballoc, &submit->cmdbuf, + ALIGN(args->stream_size, 8) + 8); + if (ret) + goto err_submit_put; + + 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 = drm_sched_job_init(&submit->sched_job, + &ctx->sched_entity[args->pipe], + submit->ctx); + if (ret) + goto err_submit_put; + + ret = submit_lookup_objects(submit, file, bos, args->nr_bos); + if (ret) + goto err_submit_job; + + 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_job; + } + + if (args->flags & ETNA_SUBMIT_FENCE_FD_IN) { + struct dma_fence *in_fence = sync_file_get_fence(args->fence_fd); + if (!in_fence) { + ret = -EINVAL; + goto err_submit_job; + } + + ret = drm_sched_job_add_dependency(&submit->sched_job, + in_fence); + if (ret) + goto err_submit_job; + } + + ret = submit_pin_objects(submit); + if (ret) + goto err_submit_job; + + ret = submit_reloc(submit, stream, args->stream_size / 4, + relocs, args->nr_relocs); + if (ret) + goto err_submit_job; + + ret = submit_perfmon_validate(submit, args->exec_state, pmrs); + if (ret) + goto err_submit_job; + + memcpy(submit->cmdbuf.vaddr, stream, args->stream_size); + + ret = submit_lock_objects(submit, &ticket); + if (ret) + goto err_submit_job; + + ret = submit_fence_sync(submit); + if (ret) + goto err_submit_job; + + ret = etnaviv_sched_push_job(submit); + if (ret) + goto err_submit_job; + + 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; + /* + * When this late error is hit, the submit has already + * been handed over to the scheduler. At this point + * the sched_job must not be cleaned up. + */ + goto err_submit_put; + } + fd_install(out_fence_fd, sync_file->file); + } + + args->fence_fd = out_fence_fd; + args->fence = submit->out_fence_id; + +err_submit_job: + if (ret) + drm_sched_job_cleanup(&submit->sched_job); +err_submit_put: + 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); + kvfree(stream); + kvfree(bos); + kvfree(relocs); + kvfree(pmrs); + + return ret; +} -- cgit v1.2.3