[deliverable/linux.git] / drivers / gpu / drm / msm / msm_gem_submit.c

/*
 * Copyright (C) 2013 Red Hat
 * Author: Rob Clark <robdclark@gmail.com>
 *
 * 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 "msm_drv.h"
#include "msm_gpu.h"
#include "msm_gem.h"

/*
 * Cmdstream submission:
 */

/* make sure these don't conflict w/ MSM_SUBMIT_BO_x */
#define BO_VALID    0x8000   /* is current addr in cmdstream correct/valid? */
#define BO_LOCKED   0x4000
#define BO_PINNED   0x2000

static struct msm_gem_submit *submit_create(struct drm_device *dev,
		struct msm_gpu *gpu, int nr_bos, int nr_cmds)
{
	struct msm_gem_submit *submit;
	int sz = sizeof(*submit) + (nr_bos * sizeof(submit->bos[0])) +
			(nr_cmds * sizeof(*submit->cmd));

	submit = kmalloc(sz, GFP_TEMPORARY | __GFP_NOWARN | __GFP_NORETRY);
	if (!submit)
		return NULL;

	submit->dev = dev;
	submit->gpu = gpu;
	submit->fence = NULL;
	submit->pid = get_pid(task_pid(current));
	submit->cmd = (void *)&submit->bos[nr_bos];

	/* initially, until copy_from_user() and bo lookup succeeds: */
	submit->nr_bos = 0;
	submit->nr_cmds = 0;

	INIT_LIST_HEAD(&submit->node);
	INIT_LIST_HEAD(&submit->bo_list);
	ww_acquire_init(&submit->ticket, &reservation_ww_class);

	return submit;
}

void msm_gem_submit_free(struct msm_gem_submit *submit)
{
	fence_put(submit->fence);
	list_del(&submit->node);
	put_pid(submit->pid);
	kfree(submit);
}

static int submit_lookup_objects(struct msm_gem_submit *submit,
		struct drm_msm_gem_submit *args, struct drm_file *file)
{
	unsigned i;
	int ret = 0;

	spin_lock(&file->table_lock);

	for (i = 0; i < args->nr_bos; i++) {
		struct drm_msm_gem_submit_bo submit_bo;
		struct drm_gem_object *obj;
		struct msm_gem_object *msm_obj;
		void __user *userptr =
			u64_to_user_ptr(args->bos + (i * sizeof(submit_bo)));

		/* make sure we don't have garbage flags, in case we hit
		 * error path before flags is initialized:
		 */
		submit->bos[i].flags = 0;

		ret = copy_from_user(&submit_bo, userptr, sizeof(submit_bo));
		if (ret) {
			ret = -EFAULT;
			goto out_unlock;
		}

		if (submit_bo.flags & ~MSM_SUBMIT_BO_FLAGS) {
			DRM_ERROR("invalid flags: %x\n", submit_bo.flags);
			ret = -EINVAL;
			goto out_unlock;
		}

		submit->bos[i].flags = submit_bo.flags;
		/* in validate_objects() we figure out if this is true: */
		submit->bos[i].iova  = submit_bo.presumed;

		/* normally use drm_gem_object_lookup(), but for bulk lookup
		 * all under single table_lock just hit object_idr directly:
		 */
		obj = idr_find(&file->object_idr, submit_bo.handle);
		if (!obj) {
			DRM_ERROR("invalid handle %u at index %u\n", submit_bo.handle, i);
			ret = -EINVAL;
			goto out_unlock;
		}

		msm_obj = to_msm_bo(obj);

		if (!list_empty(&msm_obj->submit_entry)) {
			DRM_ERROR("handle %u at index %u already on submit list\n",
					submit_bo.handle, i);
			ret = -EINVAL;
			goto out_unlock;
		}

		drm_gem_object_reference(obj);

		submit->bos[i].obj = msm_obj;

		list_add_tail(&msm_obj->submit_entry, &submit->bo_list);
	}

out_unlock:
	submit->nr_bos = i;
	spin_unlock(&file->table_lock);

	return ret;
}

static void submit_unlock_unpin_bo(struct msm_gem_submit *submit, int i)
{
	struct msm_gem_object *msm_obj = submit->bos[i].obj;

	if (submit->bos[i].flags & BO_PINNED)
		msm_gem_put_iova(&msm_obj->base, submit->gpu->id);

	if (submit->bos[i].flags & BO_LOCKED)
		ww_mutex_unlock(&msm_obj->resv->lock);

	if (!(submit->bos[i].flags & BO_VALID))
		submit->bos[i].iova = 0;

	submit->bos[i].flags &= ~(BO_LOCKED | BO_PINNED);
}

/* This is where we make sure all the bo's are reserved and pin'd: */
static int submit_lock_objects(struct msm_gem_submit *submit)
{
	int contended, slow_locked = -1, i, ret = 0;

retry:
	for (i = 0; i < submit->nr_bos; i++) {
		struct msm_gem_object *msm_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(&msm_obj->resv->lock,
					&submit->ticket);
			if (ret)
				goto fail;
			submit->bos[i].flags |= BO_LOCKED;
		}
	}

	ww_acquire_done(&submit->ticket);

	return 0;

fail:
	for (; i >= 0; i--)
		submit_unlock_unpin_bo(submit, i);

	if (slow_locked > 0)
		submit_unlock_unpin_bo(submit, slow_locked);

	if (ret == -EDEADLK) {
		struct msm_gem_object *msm_obj = submit->bos[contended].obj;
		/* we lost out in a seqno race, lock and retry.. */
		ret = ww_mutex_lock_slow_interruptible(&msm_obj->resv->lock,
				&submit->ticket);
		if (!ret) {
			submit->bos[contended].flags |= BO_LOCKED;
			slow_locked = contended;
			goto retry;
		}
	}

	return ret;
}

static int submit_fence_sync(struct msm_gem_submit *submit)
{
	int i, ret = 0;

	for (i = 0; i < submit->nr_bos; i++) {
		struct msm_gem_object *msm_obj = submit->bos[i].obj;
		bool write = submit->bos[i].flags & MSM_SUBMIT_BO_WRITE;

		ret = msm_gem_sync_object(&msm_obj->base, submit->gpu->fctx, write);
		if (ret)
			break;
	}

	return ret;
}

static int submit_pin_objects(struct msm_gem_submit *submit)
{
	int i, ret = 0;

	submit->valid = true;

	for (i = 0; i < submit->nr_bos; i++) {
		struct msm_gem_object *msm_obj = submit->bos[i].obj;
		uint32_t iova;

		/* if locking succeeded, pin bo: */
		ret = msm_gem_get_iova_locked(&msm_obj->base,
				submit->gpu->id, &iova);

		if (ret)
			break;

		submit->bos[i].flags |= BO_PINNED;

		if (iova == submit->bos[i].iova) {
			submit->bos[i].flags |= BO_VALID;
		} else {
			submit->bos[i].iova = iova;
			/* iova changed, so address in cmdstream is not valid: */
			submit->bos[i].flags &= ~BO_VALID;
			submit->valid = false;
		}
	}

	return ret;
}

static int submit_bo(struct msm_gem_submit *submit, uint32_t idx,
		struct msm_gem_object **obj, uint32_t *iova, bool *valid)
{
	if (idx >= submit->nr_bos) {
		DRM_ERROR("invalid buffer index: %u (out of %u)\n",
				idx, submit->nr_bos);
		return -EINVAL;
	}

	if (obj)
		*obj = submit->bos[idx].obj;
	if (iova)
		*iova = submit->bos[idx].iova;
	if (valid)
		*valid = !!(submit->bos[idx].flags & BO_VALID);

	return 0;
}

/* process the reloc's and patch up the cmdstream as needed: */
static int submit_reloc(struct msm_gem_submit *submit, struct msm_gem_object *obj,
		uint32_t offset, uint32_t nr_relocs, uint64_t relocs)
{
	uint32_t i, last_offset = 0;
	uint32_t *ptr;
	int ret;

	if (offset % 4) {
		DRM_ERROR("non-aligned cmdstream buffer: %u\n", offset);
		return -EINVAL;
	}

	/* For now, just map the entire thing.  Eventually we probably
	 * to do it page-by-page, w/ kmap() if not vmap()d..
	 */
	ptr = msm_gem_get_vaddr_locked(&obj->base);

	if (IS_ERR(ptr)) {
		ret = PTR_ERR(ptr);
		DBG("failed to map: %d", ret);
		return ret;
	}

	for (i = 0; i < nr_relocs; i++) {
		struct drm_msm_gem_submit_reloc submit_reloc;
		void __user *userptr =
			u64_to_user_ptr(relocs + (i * sizeof(submit_reloc)));
		uint32_t iova, off;
		bool valid;

		ret = copy_from_user(&submit_reloc, userptr, sizeof(submit_reloc));
		if (ret)
			return -EFAULT;

		if (submit_reloc.submit_offset % 4) {
			DRM_ERROR("non-aligned reloc offset: %u\n",
					submit_reloc.submit_offset);
			return -EINVAL;
		}

		/* offset in dwords: */
		off = submit_reloc.submit_offset / 4;

		if ((off >= (obj->base.size / 4)) ||
				(off < last_offset)) {
			DRM_ERROR("invalid offset %u at reloc %u\n", off, i);
			return -EINVAL;
		}

		ret = submit_bo(submit, submit_reloc.reloc_idx, NULL, &iova, &valid);
		if (ret)
			return ret;

		if (valid)
			continue;

		iova += submit_reloc.reloc_offset;

		if (submit_reloc.shift < 0)
			iova >>= -submit_reloc.shift;
		else
			iova <<= submit_reloc.shift;

		ptr[off] = iova | submit_reloc.or;

		last_offset = off;
	}

	msm_gem_put_vaddr_locked(&obj->base);

	return 0;
}

static void submit_cleanup(struct msm_gem_submit *submit)
{
	unsigned i;

	for (i = 0; i < submit->nr_bos; i++) {
		struct msm_gem_object *msm_obj = submit->bos[i].obj;
		submit_unlock_unpin_bo(submit, i);
		list_del_init(&msm_obj->submit_entry);
		drm_gem_object_unreference(&msm_obj->base);
	}

	ww_acquire_fini(&submit->ticket);
}

int msm_ioctl_gem_submit(struct drm_device *dev, void *data,
		struct drm_file *file)
{
	struct msm_drm_private *priv = dev->dev_private;
	struct drm_msm_gem_submit *args = data;
	struct msm_file_private *ctx = file->driver_priv;
	struct msm_gem_submit *submit;
	struct msm_gpu *gpu = priv->gpu;
	unsigned i;
	int ret;

	if (!gpu)
		return -ENXIO;

	/* for now, we just have 3d pipe.. eventually this would need to
	 * be more clever to dispatch to appropriate gpu module:
	 */
	if (args->pipe != MSM_PIPE_3D0)
		return -EINVAL;

	ret = mutex_lock_interruptible(&dev->struct_mutex);
	if (ret)
		return ret;

	submit = submit_create(dev, gpu, args->nr_bos, args->nr_cmds);
	if (!submit) {
		ret = -ENOMEM;
		goto out_unlock;
	}

	ret = submit_lookup_objects(submit, args, file);
	if (ret)
		goto out;

	ret = submit_lock_objects(submit);
	if (ret)
		goto out;

	ret = submit_fence_sync(submit);
	if (ret)
		goto out;

	ret = submit_pin_objects(submit);
	if (ret)
		goto out;

	for (i = 0; i < args->nr_cmds; i++) {
		struct drm_msm_gem_submit_cmd submit_cmd;
		void __user *userptr =
			u64_to_user_ptr(args->cmds + (i * sizeof(submit_cmd)));
		struct msm_gem_object *msm_obj;
		uint32_t iova;

		ret = copy_from_user(&submit_cmd, userptr, sizeof(submit_cmd));
		if (ret) {
			ret = -EFAULT;
			goto out;
		}

		/* validate input from userspace: */
		switch (submit_cmd.type) {
		case MSM_SUBMIT_CMD_BUF:
		case MSM_SUBMIT_CMD_IB_TARGET_BUF:
		case MSM_SUBMIT_CMD_CTX_RESTORE_BUF:
			break;
		default:
			DRM_ERROR("invalid type: %08x\n", submit_cmd.type);
			ret = -EINVAL;
			goto out;
		}

		ret = submit_bo(submit, submit_cmd.submit_idx,
				&msm_obj, &iova, NULL);
		if (ret)
			goto out;

		if (submit_cmd.size % 4) {
			DRM_ERROR("non-aligned cmdstream buffer size: %u\n",
					submit_cmd.size);
			ret = -EINVAL;
			goto out;
		}

		if ((submit_cmd.size + submit_cmd.submit_offset) >=
				msm_obj->base.size) {
			DRM_ERROR("invalid cmdstream size: %u\n", submit_cmd.size);
			ret = -EINVAL;
			goto out;
		}

		submit->cmd[i].type = submit_cmd.type;
		submit->cmd[i].size = submit_cmd.size / 4;
		submit->cmd[i].iova = iova + submit_cmd.submit_offset;
		submit->cmd[i].idx  = submit_cmd.submit_idx;

		if (submit->valid)
			continue;

		ret = submit_reloc(submit, msm_obj, submit_cmd.submit_offset,
				submit_cmd.nr_relocs, submit_cmd.relocs);
		if (ret)
			goto out;
	}

	submit->nr_cmds = i;

	ret = msm_gpu_submit(gpu, submit, ctx);

	args->fence = submit->fence->seqno;

out:
	submit_cleanup(submit);
	if (ret)
		msm_gem_submit_free(submit);
out_unlock:
	mutex_unlock(&dev->struct_mutex);
	return ret;
}
Commit	Line	Data
7198e6b0 RC	1	/*
	2	* Copyright (C) 2013 Red Hat
	3	* Author: Rob Clark <robdclark@gmail.com>
	4	*
	5	* This program is free software; you can redistribute it and/or modify it
	6	* under the terms of the GNU General Public License version 2 as published by
	7	* the Free Software Foundation.
	8	*
	9	* This program is distributed in the hope that it will be useful, but WITHOUT
	10	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
	11	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
	12	* more details.
	13	*
	14	* You should have received a copy of the GNU General Public License along with
	15	* this program. If not, see <http://www.gnu.org/licenses/>.
	16	*/
	17
	18	#include "msm_drv.h"
	19	#include "msm_gpu.h"
	20	#include "msm_gem.h"
	21
	22	/*
	23	* Cmdstream submission:
	24	*/
	25
7198e6b0	26	/* make sure these don't conflict w/ MSM_SUBMIT_BO_x */
340faef2	27	#define BO_VALID 0x8000 /* is current addr in cmdstream correct/valid? */
7198e6b0 RC	28	#define BO_LOCKED 0x4000
	29	#define BO_PINNED 0x2000
	30
7198e6b0	31	static struct msm_gem_submit submit_create(struct drm_device dev,
6b597ce2	32	struct msm_gpu *gpu, int nr_bos, int nr_cmds)
7198e6b0 RC	33	{
7198e6b0 RC	34	struct msm_gem_submit *submit;
6b597ce2 RC	35	int sz = sizeof(submit) + (nr_bos sizeof(submit->bos[0])) +
6b597ce2 RC	36	(nr_cmds * sizeof(*submit->cmd));
7198e6b0 RC	37
7198e6b0 RC	38	submit = kmalloc(sz, GFP_TEMPORARY \| __GFP_NOWARN \| __GFP_NORETRY);
6860b56c RC	39	if (!submit)
6860b56c RC	40	return NULL;
7198e6b0	41
6860b56c RC	42	submit->dev = dev;
6860b56c RC	43	submit->gpu = gpu;
ba344afd	44	submit->fence = NULL;
4816b626	45	submit->pid = get_pid(task_pid(current));
6b597ce2	46	submit->cmd = (void *)&submit->bos[nr_bos];
7198e6b0	47
6860b56c RC	48	/* initially, until copy_from_user() and bo lookup succeeds: */
	49	submit->nr_bos = 0;
	50	submit->nr_cmds = 0;
	51
ba344afd	52	INIT_LIST_HEAD(&submit->node);
6860b56c RC	53	INIT_LIST_HEAD(&submit->bo_list);
6860b56c RC	54	ww_acquire_init(&submit->ticket, &reservation_ww_class);
7198e6b0 RC	55
	56	return submit;
	57	}
	58
40e6815b RC	59	void msm_gem_submit_free(struct msm_gem_submit *submit)
	60	{
	61	fence_put(submit->fence);
	62	list_del(&submit->node);
4816b626	63	put_pid(submit->pid);
40e6815b RC	64	kfree(submit);
	65	}
	66
7198e6b0 RC	67	static int submit_lookup_objects(struct msm_gem_submit *submit,
	68	struct drm_msm_gem_submit args, struct drm_file file)
	69	{
	70	unsigned i;
	71	int ret = 0;
	72
	73	spin_lock(&file->table_lock);
	74
	75	for (i = 0; i < args->nr_bos; i++) {
	76	struct drm_msm_gem_submit_bo submit_bo;
	77	struct drm_gem_object *obj;
	78	struct msm_gem_object *msm_obj;
	79	void __user *userptr =
3ed605bc	80	u64_to_user_ptr(args->bos + (i * sizeof(submit_bo)));
7198e6b0	81
a9e26cab RC	82	/* make sure we don't have garbage flags, in case we hit
	83	* error path before flags is initialized:
	84	*/
	85	submit->bos[i].flags = 0;
	86
7198e6b0 RC	87	ret = copy_from_user(&submit_bo, userptr, sizeof(submit_bo));
	88	if (ret) {
	89	ret = -EFAULT;
	90	goto out_unlock;
	91	}
	92
93ddb0d3	93	if (submit_bo.flags & ~MSM_SUBMIT_BO_FLAGS) {
19872533	94	DRM_ERROR("invalid flags: %x\n", submit_bo.flags);
7198e6b0 RC	95	ret = -EINVAL;
	96	goto out_unlock;
	97	}
	98
	99	submit->bos[i].flags = submit_bo.flags;
	100	/* in validate_objects() we figure out if this is true: */
	101	submit->bos[i].iova = submit_bo.presumed;
	102
	103	/* normally use drm_gem_object_lookup(), but for bulk lookup
	104	* all under single table_lock just hit object_idr directly:
	105	*/
	106	obj = idr_find(&file->object_idr, submit_bo.handle);
	107	if (!obj) {
19872533	108	DRM_ERROR("invalid handle %u at index %u\n", submit_bo.handle, i);
7198e6b0 RC	109	ret = -EINVAL;
	110	goto out_unlock;
	111	}
	112
	113	msm_obj = to_msm_bo(obj);
	114
	115	if (!list_empty(&msm_obj->submit_entry)) {
19872533	116	DRM_ERROR("handle %u at index %u already on submit list\n",
7198e6b0 RC	117	submit_bo.handle, i);
	118	ret = -EINVAL;
	119	goto out_unlock;
	120	}
	121
	122	drm_gem_object_reference(obj);
	123
	124	submit->bos[i].obj = msm_obj;
	125
	126	list_add_tail(&msm_obj->submit_entry, &submit->bo_list);
	127	}
	128
	129	out_unlock:
	130	submit->nr_bos = i;
	131	spin_unlock(&file->table_lock);
	132
	133	return ret;
	134	}
	135
	136	static void submit_unlock_unpin_bo(struct msm_gem_submit *submit, int i)
	137	{
	138	struct msm_gem_object *msm_obj = submit->bos[i].obj;
	139
	140	if (submit->bos[i].flags & BO_PINNED)
	141	msm_gem_put_iova(&msm_obj->base, submit->gpu->id);
	142
	143	if (submit->bos[i].flags & BO_LOCKED)
	144	ww_mutex_unlock(&msm_obj->resv->lock);
	145
	146	if (!(submit->bos[i].flags & BO_VALID))
	147	submit->bos[i].iova = 0;
	148
	149	submit->bos[i].flags &= ~(BO_LOCKED \| BO_PINNED);
	150	}
	151
	152	/* This is where we make sure all the bo's are reserved and pin'd: */
340faef2	153	static int submit_lock_objects(struct msm_gem_submit *submit)
7198e6b0 RC	154	{
	155	int contended, slow_locked = -1, i, ret = 0;
	156
	157	retry:
7198e6b0 RC	158	for (i = 0; i < submit->nr_bos; i++) {
7198e6b0 RC	159	struct msm_gem_object *msm_obj = submit->bos[i].obj;
7198e6b0 RC	160
	161	if (slow_locked == i)
	162	slow_locked = -1;
	163
	164	contended = i;
	165
	166	if (!(submit->bos[i].flags & BO_LOCKED)) {
	167	ret = ww_mutex_lock_interruptible(&msm_obj->resv->lock,
	168	&submit->ticket);
	169	if (ret)
	170	goto fail;
	171	submit->bos[i].flags \|= BO_LOCKED;
	172	}
7198e6b0 RC	173	}
	174
	175	ww_acquire_done(&submit->ticket);
	176
	177	return 0;
	178
	179	fail:
	180	for (; i >= 0; i--)
	181	submit_unlock_unpin_bo(submit, i);
	182
	183	if (slow_locked > 0)
	184	submit_unlock_unpin_bo(submit, slow_locked);
	185
	186	if (ret == -EDEADLK) {
	187	struct msm_gem_object *msm_obj = submit->bos[contended].obj;
	188	/* we lost out in a seqno race, lock and retry.. */
	189	ret = ww_mutex_lock_slow_interruptible(&msm_obj->resv->lock,
	190	&submit->ticket);
	191	if (!ret) {
	192	submit->bos[contended].flags \|= BO_LOCKED;
	193	slow_locked = contended;
	194	goto retry;
	195	}
	196	}
	197
	198	return ret;
	199	}
	200
b6295f9a RC	201	static int submit_fence_sync(struct msm_gem_submit *submit)
	202	{
	203	int i, ret = 0;
	204
	205	for (i = 0; i < submit->nr_bos; i++) {
	206	struct msm_gem_object *msm_obj = submit->bos[i].obj;
	207	bool write = submit->bos[i].flags & MSM_SUBMIT_BO_WRITE;
	208
	209	ret = msm_gem_sync_object(&msm_obj->base, submit->gpu->fctx, write);
	210	if (ret)
	211	break;
	212	}
	213
	214	return ret;
	215	}
	216
340faef2 RC	217	static int submit_pin_objects(struct msm_gem_submit *submit)
	218	{
	219	int i, ret = 0;
	220
	221	submit->valid = true;
	222
	223	for (i = 0; i < submit->nr_bos; i++) {
	224	struct msm_gem_object *msm_obj = submit->bos[i].obj;
	225	uint32_t iova;
	226
	227	/* if locking succeeded, pin bo: */
	228	ret = msm_gem_get_iova_locked(&msm_obj->base,
	229	submit->gpu->id, &iova);
	230
	231	if (ret)
	232	break;
	233
	234	submit->bos[i].flags \|= BO_PINNED;
	235
	236	if (iova == submit->bos[i].iova) {
	237	submit->bos[i].flags \|= BO_VALID;
	238	} else {
	239	submit->bos[i].iova = iova;
	240	/* iova changed, so address in cmdstream is not valid: */
	241	submit->bos[i].flags &= ~BO_VALID;
	242	submit->valid = false;
	243	}
	244	}
	245
	246	return ret;
	247	}
	248
7198e6b0 RC	249	static int submit_bo(struct msm_gem_submit *submit, uint32_t idx,
	250	struct msm_gem_object *obj, uint32_t iova, bool *valid)
	251	{
	252	if (idx >= submit->nr_bos) {
19872533 RC	253	DRM_ERROR("invalid buffer index: %u (out of %u)\n",
	254	idx, submit->nr_bos);
	255	return -EINVAL;
7198e6b0 RC	256	}
	257
	258	if (obj)
	259	*obj = submit->bos[idx].obj;
	260	if (iova)
	261	*iova = submit->bos[idx].iova;
	262	if (valid)
	263	*valid = !!(submit->bos[idx].flags & BO_VALID);
	264
	265	return 0;
	266	}
	267
	268	/* process the reloc's and patch up the cmdstream as needed: */
	269	static int submit_reloc(struct msm_gem_submit submit, struct msm_gem_object obj,
	270	uint32_t offset, uint32_t nr_relocs, uint64_t relocs)
	271	{
	272	uint32_t i, last_offset = 0;
	273	uint32_t *ptr;
	274	int ret;
	275
	276	if (offset % 4) {
19872533	277	DRM_ERROR("non-aligned cmdstream buffer: %u\n", offset);
7198e6b0 RC	278	return -EINVAL;
	279	}
	280
	281	/* For now, just map the entire thing. Eventually we probably
	282	* to do it page-by-page, w/ kmap() if not vmap()d..
	283	*/
18f23049	284	ptr = msm_gem_get_vaddr_locked(&obj->base);
7198e6b0 RC	285
	286	if (IS_ERR(ptr)) {
	287	ret = PTR_ERR(ptr);
	288	DBG("failed to map: %d", ret);
	289	return ret;
	290	}
	291
	292	for (i = 0; i < nr_relocs; i++) {
	293	struct drm_msm_gem_submit_reloc submit_reloc;
	294	void __user *userptr =
3ed605bc	295	u64_to_user_ptr(relocs + (i * sizeof(submit_reloc)));
7198e6b0 RC	296	uint32_t iova, off;
	297	bool valid;
	298
	299	ret = copy_from_user(&submit_reloc, userptr, sizeof(submit_reloc));
	300	if (ret)
	301	return -EFAULT;
	302
	303	if (submit_reloc.submit_offset % 4) {
19872533	304	DRM_ERROR("non-aligned reloc offset: %u\n",
7198e6b0 RC	305	submit_reloc.submit_offset);
	306	return -EINVAL;
	307	}
	308
	309	/* offset in dwords: */
	310	off = submit_reloc.submit_offset / 4;
	311
	312	if ((off >= (obj->base.size / 4)) \|\|
	313	(off < last_offset)) {
19872533	314	DRM_ERROR("invalid offset %u at reloc %u\n", off, i);
7198e6b0 RC	315	return -EINVAL;
	316	}
	317
	318	ret = submit_bo(submit, submit_reloc.reloc_idx, NULL, &iova, &valid);
	319	if (ret)
	320	return ret;
	321
	322	if (valid)
	323	continue;
	324
	325	iova += submit_reloc.reloc_offset;
	326
	327	if (submit_reloc.shift < 0)
	328	iova >>= -submit_reloc.shift;
	329	else
	330	iova <<= submit_reloc.shift;
	331
	332	ptr[off] = iova \| submit_reloc.or;
	333
	334	last_offset = off;
	335	}
	336
18f23049 RC	337	msm_gem_put_vaddr_locked(&obj->base);
18f23049 RC	338
7198e6b0 RC	339	return 0;
	340	}
	341
40e6815b	342	static void submit_cleanup(struct msm_gem_submit *submit)
7198e6b0 RC	343	{
	344	unsigned i;
	345
7198e6b0 RC	346	for (i = 0; i < submit->nr_bos; i++) {
	347	struct msm_gem_object *msm_obj = submit->bos[i].obj;
	348	submit_unlock_unpin_bo(submit, i);
	349	list_del_init(&msm_obj->submit_entry);
	350	drm_gem_object_unreference(&msm_obj->base);
	351	}
7198e6b0 RC	352
7198e6b0 RC	353	ww_acquire_fini(&submit->ticket);
7198e6b0 RC	354	}
	355
	356	int msm_ioctl_gem_submit(struct drm_device dev, void data,
	357	struct drm_file *file)
	358	{
	359	struct msm_drm_private *priv = dev->dev_private;
	360	struct drm_msm_gem_submit *args = data;
	361	struct msm_file_private *ctx = file->driver_priv;
	362	struct msm_gem_submit *submit;
c01a958e	363	struct msm_gpu *gpu = priv->gpu;
7198e6b0 RC	364	unsigned i;
	365	int ret;
	366
c01a958e RC	367	if (!gpu)
	368	return -ENXIO;
	369
7198e6b0 RC	370	/* for now, we just have 3d pipe.. eventually this would need to
	371	* be more clever to dispatch to appropriate gpu module:
	372	*/
	373	if (args->pipe != MSM_PIPE_3D0)
	374	return -EINVAL;
	375
b5b4c264 RC	376	ret = mutex_lock_interruptible(&dev->struct_mutex);
	377	if (ret)
	378	return ret;
687f084a	379
6b597ce2	380	submit = submit_create(dev, gpu, args->nr_bos, args->nr_cmds);
b5b4c264 RC	381	if (!submit) {
	382	ret = -ENOMEM;
	383	goto out_unlock;
	384	}
7198e6b0 RC	385
	386	ret = submit_lookup_objects(submit, args, file);
	387	if (ret)
	388	goto out;
	389
340faef2 RC	390	ret = submit_lock_objects(submit);
	391	if (ret)
	392	goto out;
	393
b6295f9a RC	394	ret = submit_fence_sync(submit);
	395	if (ret)
	396	goto out;
	397
340faef2	398	ret = submit_pin_objects(submit);
7198e6b0 RC	399	if (ret)
	400	goto out;
	401
	402	for (i = 0; i < args->nr_cmds; i++) {
	403	struct drm_msm_gem_submit_cmd submit_cmd;
	404	void __user *userptr =
3ed605bc	405	u64_to_user_ptr(args->cmds + (i * sizeof(submit_cmd)));
7198e6b0 RC	406	struct msm_gem_object *msm_obj;
	407	uint32_t iova;
	408
	409	ret = copy_from_user(&submit_cmd, userptr, sizeof(submit_cmd));
	410	if (ret) {
	411	ret = -EFAULT;
	412	goto out;
	413	}
	414
93ddb0d3 RC	415	/* validate input from userspace: */
	416	switch (submit_cmd.type) {
	417	case MSM_SUBMIT_CMD_BUF:
	418	case MSM_SUBMIT_CMD_IB_TARGET_BUF:
	419	case MSM_SUBMIT_CMD_CTX_RESTORE_BUF:
	420	break;
	421	default:
	422	DRM_ERROR("invalid type: %08x\n", submit_cmd.type);
	423	ret = -EINVAL;
	424	goto out;
	425	}
	426
7198e6b0 RC	427	ret = submit_bo(submit, submit_cmd.submit_idx,
	428	&msm_obj, &iova, NULL);
	429	if (ret)
	430	goto out;
	431
	432	if (submit_cmd.size % 4) {
19872533	433	DRM_ERROR("non-aligned cmdstream buffer size: %u\n",
7198e6b0 RC	434	submit_cmd.size);
	435	ret = -EINVAL;
	436	goto out;
	437	}
	438
19872533 RC	439	if ((submit_cmd.size + submit_cmd.submit_offset) >=
	440	msm_obj->base.size) {
	441	DRM_ERROR("invalid cmdstream size: %u\n", submit_cmd.size);
7198e6b0 RC	442	ret = -EINVAL;
	443	goto out;
	444	}
	445
	446	submit->cmd[i].type = submit_cmd.type;
	447	submit->cmd[i].size = submit_cmd.size / 4;
	448	submit->cmd[i].iova = iova + submit_cmd.submit_offset;
a7d3c950	449	submit->cmd[i].idx = submit_cmd.submit_idx;
7198e6b0 RC	450
	451	if (submit->valid)
	452	continue;
	453
	454	ret = submit_reloc(submit, msm_obj, submit_cmd.submit_offset,
	455	submit_cmd.nr_relocs, submit_cmd.relocs);
	456	if (ret)
	457	goto out;
	458	}
	459
	460	submit->nr_cmds = i;
	461
	462	ret = msm_gpu_submit(gpu, submit, ctx);
	463
b6295f9a	464	args->fence = submit->fence->seqno;
7198e6b0 RC	465
7198e6b0 RC	466	out:
40e6815b RC	467	submit_cleanup(submit);
	468	if (ret)
	469	msm_gem_submit_free(submit);
b5b4c264	470	out_unlock:
c2703b13	471	mutex_unlock(&dev->struct_mutex);
7198e6b0 RC	472	return ret;
7198e6b0 RC	473	}