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