437 lines
10 KiB
C
437 lines
10 KiB
C
/*
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* Copyright (C) 2015 Etnaviv Project
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 as published by
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* the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <linux/reservation.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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/*
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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)
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{
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struct etnaviv_gem_submit *submit;
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size_t sz = size_vstruct(nr, sizeof(submit->bos[0]), sizeof(*submit));
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submit = kmalloc(sz, GFP_TEMPORARY | __GFP_NOWARN | __GFP_NORETRY);
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if (submit) {
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submit->dev = dev;
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submit->gpu = gpu;
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/* initially, until copy_from_user() and bo lookup succeeds: */
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submit->nr_bos = 0;
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ww_acquire_init(&submit->ticket, &reservation_ww_class);
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}
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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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/* 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_reference(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 etnaviv_gem_object *etnaviv_obj = submit->bos[i].obj;
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ww_mutex_unlock(&etnaviv_obj->resv->lock);
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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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{
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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 etnaviv_gem_object *etnaviv_obj = submit->bos[i].obj;
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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 = ww_mutex_lock_interruptible(&etnaviv_obj->resv->lock,
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&submit->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(&submit->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 etnaviv_gem_object *etnaviv_obj;
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etnaviv_obj = submit->bos[contended].obj;
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/* we lost out in a seqno race, lock and retry.. */
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ret = ww_mutex_lock_slow_interruptible(&etnaviv_obj->resv->lock,
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&submit->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(const struct etnaviv_gem_submit *submit)
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{
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unsigned int context = submit->gpu->fence_context;
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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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bool write = submit->bos[i].flags & ETNA_SUBMIT_BO_WRITE;
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ret = etnaviv_gpu_fence_sync_obj(etnaviv_obj, context, write);
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if (ret)
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break;
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}
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return ret;
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}
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static void submit_unpin_objects(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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if (submit->bos[i].flags & BO_PINNED)
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etnaviv_gem_mapping_unreference(submit->bos[i].mapping);
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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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}
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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->gpu);
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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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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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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", 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 void submit_cleanup(struct etnaviv_gem_submit *submit)
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{
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unsigned i;
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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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submit_unlock_object(submit, i);
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drm_gem_object_unreference_unlocked(&etnaviv_obj->base);
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}
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ww_acquire_fini(&submit->ticket);
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kfree(submit);
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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_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_bo *bos;
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struct etnaviv_gem_submit *submit;
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struct etnaviv_cmdbuf *cmdbuf;
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struct etnaviv_gpu *gpu;
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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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/*
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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 = drm_malloc_ab(args->nr_bos, sizeof(*bos));
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relocs = drm_malloc_ab(args->nr_relocs, sizeof(*relocs));
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stream = drm_malloc_ab(1, args->stream_size);
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cmdbuf = etnaviv_cmdbuf_new(gpu->cmdbuf_suballoc,
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ALIGN(args->stream_size, 8) + 8,
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args->nr_bos);
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if (!bos || !relocs || !stream || !cmdbuf) {
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ret = -ENOMEM;
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goto err_submit_cmds;
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}
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cmdbuf->exec_state = args->exec_state;
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cmdbuf->ctx = file->driver_priv;
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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(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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submit = submit_create(dev, gpu, args->nr_bos);
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if (!submit) {
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ret = -ENOMEM;
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goto err_submit_cmds;
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}
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ret = submit_lookup_objects(submit, file, bos, args->nr_bos);
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if (ret)
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goto err_submit_objects;
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ret = submit_lock_objects(submit);
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if (ret)
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goto err_submit_objects;
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if (!etnaviv_cmd_validate_one(gpu, stream, args->stream_size / 4,
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relocs, args->nr_relocs)) {
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ret = -EINVAL;
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goto err_submit_objects;
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}
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ret = submit_fence_sync(submit);
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if (ret)
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goto err_submit_objects;
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ret = submit_pin_objects(submit);
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if (ret)
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goto out;
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ret = submit_reloc(submit, stream, args->stream_size / 4,
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relocs, args->nr_relocs);
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if (ret)
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goto out;
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memcpy(cmdbuf->vaddr, stream, args->stream_size);
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cmdbuf->user_size = ALIGN(args->stream_size, 8);
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ret = etnaviv_gpu_submit(gpu, submit, cmdbuf);
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if (ret == 0)
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cmdbuf = NULL;
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args->fence = submit->fence;
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out:
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submit_unpin_objects(submit);
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/*
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* If we're returning -EAGAIN, it may be due to the userptr code
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* wanting to run its workqueue outside of any locks. Flush our
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* workqueue to ensure that it is run in a timely manner.
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*/
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if (ret == -EAGAIN)
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flush_workqueue(priv->wq);
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err_submit_objects:
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submit_cleanup(submit);
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err_submit_cmds:
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/* if we still own the cmdbuf */
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if (cmdbuf)
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etnaviv_cmdbuf_free(cmdbuf);
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if (stream)
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drm_free_large(stream);
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if (bos)
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drm_free_large(bos);
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if (relocs)
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drm_free_large(relocs);
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return ret;
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}
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