[linux-2.6-block.git] / drivers / gpu / drm / etnaviv / etnaviv_gem_submit.c

/*
 * Copyright (C) 2015 Etnaviv Project
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 as published by
 * the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
 * more details.
 *
 * You should have received a copy of the GNU General Public License along with
 * this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#include <linux/dma-fence-array.h>
#include <linux/reservation.h>
#include <linux/sync_file.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;

		/* 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 etnaviv_gem_object *etnaviv_obj = submit->bos[i].obj;

		ww_mutex_unlock(&etnaviv_obj->resv->lock);
		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 etnaviv_gem_object *etnaviv_obj = submit->bos[i].obj;

		if (slow_locked == i)
			slow_locked = -1;

		contended = i;

		if (!(submit->bos[i].flags & BO_LOCKED)) {
			ret = ww_mutex_lock_interruptible(&etnaviv_obj->resv->lock,
							  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 etnaviv_gem_object *etnaviv_obj;

		etnaviv_obj = submit->bos[contended].obj;

		/* we lost out in a seqno race, lock and retry.. */
		ret = ww_mutex_lock_slow_interruptible(&etnaviv_obj->resv->lock,
						       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 reservation_object *robj = bo->obj->resv;

		if (!(bo->flags & ETNA_SUBMIT_BO_WRITE)) {
			ret = reservation_object_reserve_shared(robj, 1);
			if (ret)
				return ret;
		}

		if (submit->flags & ETNA_SUBMIT_NO_IMPLICIT)
			continue;

		if (bo->flags & ETNA_SUBMIT_BO_WRITE) {
			ret = reservation_object_get_fences_rcu(robj, &bo->excl,
								&bo->nr_shared,
								&bo->shared);
			if (ret)
				return ret;
		} else {
			bo->excl = reservation_object_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 etnaviv_gem_object *etnaviv_obj = submit->bos[i].obj;

		if (submit->bos[i].flags & ETNA_SUBMIT_BO_WRITE)
			reservation_object_add_excl_fence(etnaviv_obj->resv,
							  submit->out_fence);
		else
			reservation_object_add_shared_fence(etnaviv_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->gpu);
		if (IS_ERR(mapping)) {
			ret = PTR_ERR(mapping);
			break;
		}
		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;

	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);

	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_unlocked(&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;
	}

	/*
	 * 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(gpu->cmdbuf_suballoc, &submit->cmdbuf,
				  ALIGN(args->stream_size, 8) + 8);
	if (ret)
		goto err_submit_objects;

	submit->ctx = file->driver_priv;
	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 (!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;
}
Commit	Line	Data
a8c21a54 T	1	/*
	2	* Copyright (C) 2015 Etnaviv Project
	3	*
	4	* This program is free software; you can redistribute it and/or modify it
	5	* under the terms of the GNU General Public License version 2 as published by
	6	* the Free Software Foundation.
	7	*
	8	* This program is distributed in the hope that it will be useful, but WITHOUT
	9	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
	10	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
	11	* more details.
	12	*
	13	* You should have received a copy of the GNU General Public License along with
	14	* this program. If not, see <http://www.gnu.org/licenses/>.
	15	*/
	16
9ad59fea	17	#include <linux/dma-fence-array.h>
a8c21a54	18	#include <linux/reservation.h>
9ad59fea	19	#include <linux/sync_file.h>
ea1f5729	20	#include "etnaviv_cmdbuf.h"
a8c21a54 T	21	#include "etnaviv_drv.h"
	22	#include "etnaviv_gpu.h"
	23	#include "etnaviv_gem.h"
c8e4a7fd	24	#include "etnaviv_perfmon.h"
e93b6dee	25	#include "etnaviv_sched.h"
a8c21a54 T	26
	27	/*
	28	* Cmdstream submission:
	29	*/
	30
	31	#define BO_INVALID_FLAGS ~(ETNA_SUBMIT_BO_READ \| ETNA_SUBMIT_BO_WRITE)
	32	/* make sure these don't conflict w/ ETNAVIV_SUBMIT_BO_x */
	33	#define BO_LOCKED 0x4000
	34	#define BO_PINNED 0x2000
	35
a8c21a54	36	static struct etnaviv_gem_submit submit_create(struct drm_device dev,
ef146c00	37	struct etnaviv_gpu *gpu, size_t nr_bos, size_t nr_pmrs)
a8c21a54 T	38	{
a8c21a54 T	39	struct etnaviv_gem_submit *submit;
ef146c00	40	size_t sz = size_vstruct(nr_bos, sizeof(submit->bos[0]), sizeof(*submit));
a8c21a54	41
c5283723 LS	42	submit = kzalloc(sz, GFP_KERNEL);
	43	if (!submit)
	44	return NULL;
a8c21a54	45
ef146c00 LS	46	submit->pmrs = kcalloc(nr_pmrs, sizeof(struct etnaviv_perfmon_request),
	47	GFP_KERNEL);
	48	if (!submit->pmrs) {
	49	kfree(submit);
	50	return NULL;
	51	}
	52	submit->nr_pmrs = nr_pmrs;
	53
c5283723	54	submit->gpu = gpu;
e0329e6c	55	kref_init(&submit->refcount);
a8c21a54	56
a8c21a54 T	57	return submit;
	58	}
	59
	60	static int submit_lookup_objects(struct etnaviv_gem_submit *submit,
	61	struct drm_file file, struct drm_etnaviv_gem_submit_bo submit_bos,
	62	unsigned nr_bos)
	63	{
	64	struct drm_etnaviv_gem_submit_bo *bo;
	65	unsigned i;
	66	int ret = 0;
	67
	68	spin_lock(&file->table_lock);
	69
	70	for (i = 0, bo = submit_bos; i < nr_bos; i++, bo++) {
	71	struct drm_gem_object *obj;
	72
	73	if (bo->flags & BO_INVALID_FLAGS) {
	74	DRM_ERROR("invalid flags: %x\n", bo->flags);
	75	ret = -EINVAL;
	76	goto out_unlock;
	77	}
	78
	79	submit->bos[i].flags = bo->flags;
	80
	81	/* normally use drm_gem_object_lookup(), but for bulk lookup
	82	* all under single table_lock just hit object_idr directly:
	83	*/
	84	obj = idr_find(&file->object_idr, bo->handle);
	85	if (!obj) {
	86	DRM_ERROR("invalid handle %u at index %u\n",
	87	bo->handle, i);
	88	ret = -EINVAL;
	89	goto out_unlock;
	90	}
	91
	92	/*
	93	* Take a refcount on the object. The file table lock
	94	* prevents the object_idr's refcount on this being dropped.
	95	*/
23d1dd03	96	drm_gem_object_get(obj);
a8c21a54 T	97
	98	submit->bos[i].obj = to_etnaviv_bo(obj);
	99	}
	100
	101	out_unlock:
	102	submit->nr_bos = i;
	103	spin_unlock(&file->table_lock);
	104
	105	return ret;
	106	}
	107
	108	static void submit_unlock_object(struct etnaviv_gem_submit *submit, int i)
	109	{
	110	if (submit->bos[i].flags & BO_LOCKED) {
	111	struct etnaviv_gem_object *etnaviv_obj = submit->bos[i].obj;
	112
	113	ww_mutex_unlock(&etnaviv_obj->resv->lock);
	114	submit->bos[i].flags &= ~BO_LOCKED;
	115	}
	116	}
	117
08301d73 LS	118	static int submit_lock_objects(struct etnaviv_gem_submit *submit,
08301d73 LS	119	struct ww_acquire_ctx *ticket)
a8c21a54 T	120	{
	121	int contended, slow_locked = -1, i, ret = 0;
	122
	123	retry:
	124	for (i = 0; i < submit->nr_bos; i++) {
	125	struct etnaviv_gem_object *etnaviv_obj = submit->bos[i].obj;
	126
	127	if (slow_locked == i)
	128	slow_locked = -1;
	129
	130	contended = i;
	131
	132	if (!(submit->bos[i].flags & BO_LOCKED)) {
	133	ret = ww_mutex_lock_interruptible(&etnaviv_obj->resv->lock,
08301d73	134	ticket);
a8c21a54 T	135	if (ret == -EALREADY)
	136	DRM_ERROR("BO at index %u already on submit list\n",
	137	i);
	138	if (ret)
	139	goto fail;
	140	submit->bos[i].flags \|= BO_LOCKED;
	141	}
	142	}
	143
08301d73	144	ww_acquire_done(ticket);
a8c21a54 T	145
	146	return 0;
	147
	148	fail:
	149	for (; i >= 0; i--)
	150	submit_unlock_object(submit, i);
	151
	152	if (slow_locked > 0)
	153	submit_unlock_object(submit, slow_locked);
	154
	155	if (ret == -EDEADLK) {
	156	struct etnaviv_gem_object *etnaviv_obj;
	157
	158	etnaviv_obj = submit->bos[contended].obj;
	159
	160	/* we lost out in a seqno race, lock and retry.. */
	161	ret = ww_mutex_lock_slow_interruptible(&etnaviv_obj->resv->lock,
08301d73	162	ticket);
a8c21a54 T	163	if (!ret) {
	164	submit->bos[contended].flags \|= BO_LOCKED;
	165	slow_locked = contended;
	166	goto retry;
	167	}
	168	}
	169
	170	return ret;
	171	}
	172
683da226	173	static int submit_fence_sync(struct etnaviv_gem_submit *submit)
a8c21a54	174	{
a8c21a54 T	175	int i, ret = 0;
	176
	177	for (i = 0; i < submit->nr_bos; i++) {
683da226 LS	178	struct etnaviv_gem_submit_bo *bo = &submit->bos[i];
683da226 LS	179	struct reservation_object *robj = bo->obj->resv;
a8c21a54	180
683da226	181	if (!(bo->flags & ETNA_SUBMIT_BO_WRITE)) {
ca05359f	182	ret = reservation_object_reserve_shared(robj, 1);
683da226 LS	183	if (ret)
	184	return ret;
	185	}
	186
	187	if (submit->flags & ETNA_SUBMIT_NO_IMPLICIT)
	188	continue;
	189
	190	if (bo->flags & ETNA_SUBMIT_BO_WRITE) {
	191	ret = reservation_object_get_fences_rcu(robj, &bo->excl,
	192	&bo->nr_shared,
	193	&bo->shared);
	194	if (ret)
	195	return ret;
	196	} else {
	197	bo->excl = reservation_object_get_excl_rcu(robj);
	198	}
a8c21a54	199
9efabd73 LS	200	}
9efabd73 LS	201
a8c21a54 T	202	return ret;
	203	}
	204
0236efe9 LS	205	static void submit_attach_object_fences(struct etnaviv_gem_submit *submit)
	206	{
	207	int i;
	208
	209	for (i = 0; i < submit->nr_bos; i++) {
	210	struct etnaviv_gem_object *etnaviv_obj = submit->bos[i].obj;
	211
	212	if (submit->bos[i].flags & ETNA_SUBMIT_BO_WRITE)
	213	reservation_object_add_excl_fence(etnaviv_obj->resv,
10009ea2	214	submit->out_fence);
0236efe9 LS	215	else
0236efe9 LS	216	reservation_object_add_shared_fence(etnaviv_obj->resv,
10009ea2	217	submit->out_fence);
0236efe9 LS	218
	219	submit_unlock_object(submit, i);
	220	}
	221	}
	222
a8c21a54 T	223	static int submit_pin_objects(struct etnaviv_gem_submit *submit)
	224	{
	225	int i, ret = 0;
	226
	227	for (i = 0; i < submit->nr_bos; i++) {
	228	struct etnaviv_gem_object *etnaviv_obj = submit->bos[i].obj;
b6325f40	229	struct etnaviv_vram_mapping *mapping;
a8c21a54	230
b6325f40 RK	231	mapping = etnaviv_gem_mapping_get(&etnaviv_obj->base,
	232	submit->gpu);
	233	if (IS_ERR(mapping)) {
	234	ret = PTR_ERR(mapping);
a8c21a54	235	break;
b6325f40	236	}
5b223e94	237	atomic_inc(&etnaviv_obj->gpu_active);
a8c21a54 T	238
a8c21a54 T	239	submit->bos[i].flags \|= BO_PINNED;
b6325f40	240	submit->bos[i].mapping = mapping;
a8c21a54 T	241	}
	242
	243	return ret;
	244	}
	245
	246	static int submit_bo(struct etnaviv_gem_submit *submit, u32 idx,
8779aa8f	247	struct etnaviv_gem_submit_bo **bo)
a8c21a54 T	248	{
	249	if (idx >= submit->nr_bos) {
	250	DRM_ERROR("invalid buffer index: %u (out of %u)\n",
	251	idx, submit->nr_bos);
	252	return -EINVAL;
	253	}
	254
8779aa8f	255	*bo = &submit->bos[idx];
a8c21a54 T	256
	257	return 0;
	258	}
	259
	260	/* process the reloc's and patch up the cmdstream as needed: */
	261	static int submit_reloc(struct etnaviv_gem_submit submit, void stream,
	262	u32 size, const struct drm_etnaviv_gem_submit_reloc *relocs,
	263	u32 nr_relocs)
	264	{
	265	u32 i, last_offset = 0;
	266	u32 *ptr = stream;
	267	int ret;
	268
	269	for (i = 0; i < nr_relocs; i++) {
	270	const struct drm_etnaviv_gem_submit_reloc *r = relocs + i;
8779aa8f RK	271	struct etnaviv_gem_submit_bo *bo;
8779aa8f RK	272	u32 off;
a8c21a54 T	273
	274	if (unlikely(r->flags)) {
	275	DRM_ERROR("invalid reloc flags\n");
	276	return -EINVAL;
	277	}
	278
	279	if (r->submit_offset % 4) {
	280	DRM_ERROR("non-aligned reloc offset: %u\n",
	281	r->submit_offset);
	282	return -EINVAL;
	283	}
	284
	285	/* offset in dwords: */
	286	off = r->submit_offset / 4;
	287
	288	if ((off >= size ) \|\|
	289	(off < last_offset)) {
	290	DRM_ERROR("invalid offset %u at reloc %u\n", off, i);
	291	return -EINVAL;
	292	}
	293
8779aa8f	294	ret = submit_bo(submit, r->reloc_idx, &bo);
a8c21a54 T	295	if (ret)
	296	return ret;
	297
d6f756e0 WL	298	if (r->reloc_offset > bo->obj->base.size - sizeof(*ptr)) {
d6f756e0 WL	299	DRM_ERROR("relocation %u outside object\n", i);
a8c21a54 T	300	return -EINVAL;
	301	}
	302
8779aa8f	303	ptr[off] = bo->mapping->iova + r->reloc_offset;
a8c21a54 T	304
	305	last_offset = off;
	306	}
	307
	308	return 0;
	309	}
	310
c8e4a7fd	311	static int submit_perfmon_validate(struct etnaviv_gem_submit *submit,
ef146c00	312	u32 exec_state, const struct drm_etnaviv_gem_submit_pmr *pmrs)
c8e4a7fd CG	313	{
	314	u32 i;
	315
ef146c00	316	for (i = 0; i < submit->nr_pmrs; i++) {
c8e4a7fd CG	317	const struct drm_etnaviv_gem_submit_pmr *r = pmrs + i;
	318	struct etnaviv_gem_submit_bo *bo;
	319	int ret;
	320
	321	ret = submit_bo(submit, r->read_idx, &bo);
	322	if (ret)
	323	return ret;
	324
	325	/* at offset 0 a sequence number gets stored used for userspace sync */
	326	if (r->read_offset == 0) {
	327	DRM_ERROR("perfmon request: offset is 0");
	328	return -EINVAL;
	329	}
	330
	331	if (r->read_offset >= bo->obj->base.size - sizeof(u32)) {
	332	DRM_ERROR("perfmon request: offset %u outside object", i);
	333	return -EINVAL;
	334	}
	335
	336	if (r->flags & ~(ETNA_PM_PROCESS_PRE \| ETNA_PM_PROCESS_POST)) {
	337	DRM_ERROR("perfmon request: flags are not valid");
	338	return -EINVAL;
	339	}
	340
ef146c00	341	if (etnaviv_pm_req_validate(r, exec_state)) {
c8e4a7fd CG	342	DRM_ERROR("perfmon request: domain or signal not valid");
	343	return -EINVAL;
	344	}
	345
ef146c00 LS	346	submit->pmrs[i].flags = r->flags;
	347	submit->pmrs[i].domain = r->domain;
	348	submit->pmrs[i].signal = r->signal;
	349	submit->pmrs[i].sequence = r->sequence;
	350	submit->pmrs[i].offset = r->read_offset;
	351	submit->pmrs[i].bo_vma = etnaviv_gem_vmap(&bo->obj->base);
c8e4a7fd CG	352	}
	353
	354	return 0;
	355	}
	356
e0329e6c	357	static void submit_cleanup(struct kref *kref)
a8c21a54	358	{
e0329e6c LS	359	struct etnaviv_gem_submit *submit =
e0329e6c LS	360	container_of(kref, struct etnaviv_gem_submit, refcount);
a8c21a54 T	361	unsigned i;
a8c21a54 T	362
8bda1516 LS	363	if (submit->runtime_resumed)
	364	pm_runtime_put_autosuspend(submit->gpu->dev);
	365
2f9225db LS	366	if (submit->cmdbuf.suballoc)
	367	etnaviv_cmdbuf_free(&submit->cmdbuf);
	368
a8c21a54 T	369	for (i = 0; i < submit->nr_bos; i++) {
	370	struct etnaviv_gem_object *etnaviv_obj = submit->bos[i].obj;
	371
33a63e68 LS	372	/* unpin all objects */
	373	if (submit->bos[i].flags & BO_PINNED) {
	374	etnaviv_gem_mapping_unreference(submit->bos[i].mapping);
5b223e94	375	atomic_dec(&etnaviv_obj->gpu_active);
33a63e68 LS	376	submit->bos[i].mapping = NULL;
	377	submit->bos[i].flags &= ~BO_PINNED;
	378	}
	379
0236efe9	380	/* if the GPU submit failed, objects might still be locked */
a8c21a54	381	submit_unlock_object(submit, i);
23d1dd03	382	drm_gem_object_put_unlocked(&etnaviv_obj->base);
a8c21a54 T	383	}
a8c21a54 T	384
5b223e94 LS	385	wake_up_all(&submit->gpu->fence_event);
5b223e94 LS	386
9efabd73 LS	387	if (submit->in_fence)
9efabd73 LS	388	dma_fence_put(submit->in_fence);
e93b6dee LS	389	if (submit->out_fence) {
e93b6dee LS	390	/* first remove from IDR, so fence can not be found anymore */
a0780bb1	391	mutex_lock(&submit->gpu->fence_lock);
e93b6dee	392	idr_remove(&submit->gpu->fence_idr, submit->out_fence_id);
a0780bb1	393	mutex_unlock(&submit->gpu->fence_lock);
10009ea2	394	dma_fence_put(submit->out_fence);
e93b6dee	395	}
ef146c00	396	kfree(submit->pmrs);
a8c21a54 T	397	kfree(submit);
	398	}
	399
e0329e6c LS	400	void etnaviv_submit_put(struct etnaviv_gem_submit *submit)
	401	{
	402	kref_put(&submit->refcount, submit_cleanup);
	403	}
	404
a8c21a54 T	405	int etnaviv_ioctl_gem_submit(struct drm_device dev, void data,
	406	struct drm_file *file)
	407	{
e93b6dee	408	struct etnaviv_file_private *ctx = file->driver_priv;
a8c21a54 T	409	struct etnaviv_drm_private *priv = dev->dev_private;
	410	struct drm_etnaviv_gem_submit *args = data;
	411	struct drm_etnaviv_gem_submit_reloc *relocs;
c8e4a7fd	412	struct drm_etnaviv_gem_submit_pmr *pmrs;
a8c21a54 T	413	struct drm_etnaviv_gem_submit_bo *bos;
a8c21a54 T	414	struct etnaviv_gem_submit *submit;
a8c21a54	415	struct etnaviv_gpu *gpu;
78ec187f	416	struct sync_file *sync_file = NULL;
08301d73	417	struct ww_acquire_ctx ticket;
78ec187f	418	int out_fence_fd = -1;
a8c21a54 T	419	void *stream;
	420	int ret;
	421
	422	if (args->pipe >= ETNA_MAX_PIPES)
	423	return -EINVAL;
	424
	425	gpu = priv->gpu[args->pipe];
	426	if (!gpu)
	427	return -ENXIO;
	428
	429	if (args->stream_size % 4) {
	430	DRM_ERROR("non-aligned cmdstream buffer size: %u\n",
	431	args->stream_size);
	432	return -EINVAL;
	433	}
	434
	435	if (args->exec_state != ETNA_PIPE_3D &&
	436	args->exec_state != ETNA_PIPE_2D &&
	437	args->exec_state != ETNA_PIPE_VG) {
	438	DRM_ERROR("invalid exec_state: 0x%x\n", args->exec_state);
	439	return -EINVAL;
	440	}
	441
9ad59fea PZ	442	if (args->flags & ~ETNA_SUBMIT_FLAGS) {
	443	DRM_ERROR("invalid flags: 0x%x\n", args->flags);
	444	return -EINVAL;
	445	}
	446
a8c21a54 T	447	/*
	448	* Copy the command submission and bo array to kernel space in
	449	* one go, and do this outside of any locks.
	450	*/
2098105e MH	451	bos = kvmalloc_array(args->nr_bos, sizeof(*bos), GFP_KERNEL);
2098105e MH	452	relocs = kvmalloc_array(args->nr_relocs, sizeof(*relocs), GFP_KERNEL);
c8e4a7fd	453	pmrs = kvmalloc_array(args->nr_pmrs, sizeof(*pmrs), GFP_KERNEL);
2098105e	454	stream = kvmalloc_array(1, args->stream_size, GFP_KERNEL);
2f9225db	455	if (!bos \|\| !relocs \|\| !pmrs \|\| !stream) {
a8c21a54 T	456	ret = -ENOMEM;
	457	goto err_submit_cmds;
	458	}
	459
3ed605bc	460	ret = copy_from_user(bos, u64_to_user_ptr(args->bos),
a8c21a54 T	461	args->nr_bos * sizeof(*bos));
	462	if (ret) {
	463	ret = -EFAULT;
	464	goto err_submit_cmds;
	465	}
	466
3ed605bc	467	ret = copy_from_user(relocs, u64_to_user_ptr(args->relocs),
a8c21a54 T	468	args->nr_relocs * sizeof(*relocs));
	469	if (ret) {
	470	ret = -EFAULT;
	471	goto err_submit_cmds;
	472	}
	473
c8e4a7fd CG	474	ret = copy_from_user(pmrs, u64_to_user_ptr(args->pmrs),
	475	args->nr_pmrs * sizeof(*pmrs));
	476	if (ret) {
	477	ret = -EFAULT;
	478	goto err_submit_cmds;
	479	}
c8e4a7fd	480
3ed605bc	481	ret = copy_from_user(stream, u64_to_user_ptr(args->stream),
a8c21a54 T	482	args->stream_size);
	483	if (ret) {
	484	ret = -EFAULT;
	485	goto err_submit_cmds;
	486	}
	487
78ec187f PZ	488	if (args->flags & ETNA_SUBMIT_FENCE_FD_OUT) {
	489	out_fence_fd = get_unused_fd_flags(O_CLOEXEC);
	490	if (out_fence_fd < 0) {
	491	ret = out_fence_fd;
	492	goto err_submit_cmds;
	493	}
	494	}
	495
08301d73 LS	496	ww_acquire_init(&ticket, &reservation_ww_class);
08301d73 LS	497
ef146c00	498	submit = submit_create(dev, gpu, args->nr_bos, args->nr_pmrs);
a8c21a54 T	499	if (!submit) {
a8c21a54 T	500	ret = -ENOMEM;
08301d73	501	goto err_submit_ww_acquire;
a8c21a54 T	502	}
a8c21a54 T	503
2f9225db LS	504	ret = etnaviv_cmdbuf_init(gpu->cmdbuf_suballoc, &submit->cmdbuf,
	505	ALIGN(args->stream_size, 8) + 8);
	506	if (ret)
	507	goto err_submit_objects;
	508
72ac64b8	509	submit->ctx = file->driver_priv;
797b0159	510	submit->exec_state = args->exec_state;
9ad59fea PZ	511	submit->flags = args->flags;
9ad59fea PZ	512
a8c21a54 T	513	ret = submit_lookup_objects(submit, file, bos, args->nr_bos);
	514	if (ret)
	515	goto err_submit_objects;
	516
a8c21a54 T	517	if (!etnaviv_cmd_validate_one(gpu, stream, args->stream_size / 4,
	518	relocs, args->nr_relocs)) {
	519	ret = -EINVAL;
	520	goto err_submit_objects;
	521	}
	522
9ad59fea	523	if (args->flags & ETNA_SUBMIT_FENCE_FD_IN) {
9efabd73 LS	524	submit->in_fence = sync_file_get_fence(args->fence_fd);
9efabd73 LS	525	if (!submit->in_fence) {
9ad59fea PZ	526	ret = -EINVAL;
	527	goto err_submit_objects;
	528	}
9ad59fea PZ	529	}
9ad59fea PZ	530
a8c21a54 T	531	ret = submit_pin_objects(submit);
a8c21a54 T	532	if (ret)
33a63e68	533	goto err_submit_objects;
a8c21a54 T	534
	535	ret = submit_reloc(submit, stream, args->stream_size / 4,
	536	relocs, args->nr_relocs);
	537	if (ret)
33a63e68	538	goto err_submit_objects;
a8c21a54	539
ef146c00	540	ret = submit_perfmon_validate(submit, args->exec_state, pmrs);
c8e4a7fd	541	if (ret)
33a63e68	542	goto err_submit_objects;
c8e4a7fd	543
2f9225db	544	memcpy(submit->cmdbuf.vaddr, stream, args->stream_size);
a8c21a54	545
e0580254 LS	546	ret = submit_lock_objects(submit, &ticket);
	547	if (ret)
	548	goto err_submit_objects;
	549
	550	ret = submit_fence_sync(submit);
	551	if (ret)
	552	goto err_submit_objects;
	553
e93b6dee	554	ret = etnaviv_sched_push_job(&ctx->sched_entity[args->pipe], submit);
5a642e6b	555	if (ret)
33a63e68	556	goto err_submit_objects;
5a642e6b	557
0236efe9 LS	558	submit_attach_object_fences(submit);
0236efe9 LS	559
78ec187f PZ	560	if (args->flags & ETNA_SUBMIT_FENCE_FD_OUT) {
	561	/*
	562	* This can be improved: ideally we want to allocate the sync
	563	* file before kicking off the GPU job and just attach the
	564	* fence to the sync file here, eliminating the ENOMEM
	565	* possibility at this stage.
	566	*/
10009ea2	567	sync_file = sync_file_create(submit->out_fence);
78ec187f PZ	568	if (!sync_file) {
78ec187f PZ	569	ret = -ENOMEM;
33a63e68	570	goto err_submit_objects;
78ec187f PZ	571	}
	572	fd_install(out_fence_fd, sync_file->file);
	573	}
	574
	575	args->fence_fd = out_fence_fd;
8bc4d885	576	args->fence = submit->out_fence_id;
a8c21a54	577
a8c21a54	578	err_submit_objects:
e0329e6c	579	etnaviv_submit_put(submit);
a8c21a54	580
08301d73 LS	581	err_submit_ww_acquire:
	582	ww_acquire_fini(&ticket);
	583
a8c21a54	584	err_submit_cmds:
78ec187f PZ	585	if (ret && (out_fence_fd >= 0))
78ec187f PZ	586	put_unused_fd(out_fence_fd);
a8c21a54	587	if (stream)
2098105e	588	kvfree(stream);
a8c21a54	589	if (bos)
2098105e	590	kvfree(bos);
a8c21a54	591	if (relocs)
2098105e	592	kvfree(relocs);
c8e4a7fd CG	593	if (pmrs)
c8e4a7fd CG	594	kvfree(pmrs);
a8c21a54 T	595
	596	return ret;
	597	}