[linux-2.6-block.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 <linux/sync_file.h>

#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)
{
	dma_fence_put(submit->fence);
	list_del(&submit->node);
	put_pid(submit->pid);
	kfree(submit);
}

static inline unsigned long __must_check
copy_from_user_inatomic(void *to, const void __user *from, unsigned long n)
{
	if (access_ok(VERIFY_READ, from, n))
		return __copy_from_user_inatomic(to, from, n);
	return -EFAULT;
}

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);
	pagefault_disable();

	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_inatomic(&submit_bo, userptr, sizeof(submit_bo));
		if (unlikely(ret)) {
			pagefault_enable();
			spin_unlock(&file->table_lock);
			ret = copy_from_user(&submit_bo, userptr, sizeof(submit_bo));
			if (ret)
				goto out;
			spin_lock(&file->table_lock);
			pagefault_disable();
		}

		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:
	pagefault_enable();
	spin_unlock(&file->table_lock);

out:
	submit->nr_bos = i;

	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;
	struct dma_fence *in_fence = NULL;
	struct sync_file *sync_file = NULL;
	int out_fence_fd = -1;
	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 (MSM_PIPE_ID(args->flags) != MSM_PIPE_3D0)
		return -EINVAL;

	if (MSM_PIPE_FLAGS(args->flags) & ~MSM_SUBMIT_FLAGS)
		return -EINVAL;

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

	if (args->flags & MSM_SUBMIT_FENCE_FD_OUT) {
		out_fence_fd = get_unused_fd_flags(O_CLOEXEC);
		if (out_fence_fd < 0) {
			ret = out_fence_fd;
			goto out_unlock;
		}
	}
	priv->struct_mutex_task = current;

	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;

	if (args->flags & MSM_SUBMIT_FENCE_FD_IN) {
		in_fence = sync_file_get_fence(args->fence_fd);

		if (!in_fence) {
			ret = -EINVAL;
			goto out;
		}

		/* TODO if we get an array-fence due to userspace merging multiple
		 * fences, we need a way to determine if all the backing fences
		 * are from our own context..
		 */

		if (in_fence->context != gpu->fctx->context) {
			ret = dma_fence_wait(in_fence, true);
			if (ret)
				goto out;
		}

	}

	if (!(args->fence & MSM_SUBMIT_NO_IMPLICIT)) {
		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;

	submit->fence = msm_fence_alloc(gpu->fctx);
	if (IS_ERR(submit->fence)) {
		ret = PTR_ERR(submit->fence);
		submit->fence = NULL;
		goto out;
	}

	if (args->flags & MSM_SUBMIT_FENCE_FD_OUT) {
		sync_file = sync_file_create(submit->fence);
		if (!sync_file) {
			ret = -ENOMEM;
			goto out;
		}
	}

	msm_gpu_submit(gpu, submit, ctx);

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

	if (args->flags & MSM_SUBMIT_FENCE_FD_OUT) {
		fd_install(out_fence_fd, sync_file->file);
		args->fence_fd = out_fence_fd;
	}

out:
	if (in_fence)
		dma_fence_put(in_fence);
	submit_cleanup(submit);
	if (ret)
		msm_gem_submit_free(submit);
out_unlock:
	if (ret && (out_fence_fd >= 0))
		put_unused_fd(out_fence_fd);
	priv->struct_mutex_task = NULL;
	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
f0a42bb5 RC	18	#include <linux/sync_file.h>
f0a42bb5 RC	19
7198e6b0 RC	20	#include "msm_drv.h"
	21	#include "msm_gpu.h"
	22	#include "msm_gem.h"
	23
	24	/*
	25	* Cmdstream submission:
	26	*/
	27
7198e6b0	28	/* make sure these don't conflict w/ MSM_SUBMIT_BO_x */
340faef2	29	#define BO_VALID 0x8000 /* is current addr in cmdstream correct/valid? */
7198e6b0 RC	30	#define BO_LOCKED 0x4000
	31	#define BO_PINNED 0x2000
	32
7198e6b0	33	static struct msm_gem_submit submit_create(struct drm_device dev,
6b597ce2	34	struct msm_gpu *gpu, int nr_bos, int nr_cmds)
7198e6b0 RC	35	{
7198e6b0 RC	36	struct msm_gem_submit *submit;
6b597ce2 RC	37	int sz = sizeof(submit) + (nr_bos sizeof(submit->bos[0])) +
6b597ce2 RC	38	(nr_cmds * sizeof(*submit->cmd));
7198e6b0 RC	39
7198e6b0 RC	40	submit = kmalloc(sz, GFP_TEMPORARY \| __GFP_NOWARN \| __GFP_NORETRY);
6860b56c RC	41	if (!submit)
6860b56c RC	42	return NULL;
7198e6b0	43
6860b56c RC	44	submit->dev = dev;
6860b56c RC	45	submit->gpu = gpu;
ba344afd	46	submit->fence = NULL;
4816b626	47	submit->pid = get_pid(task_pid(current));
6b597ce2	48	submit->cmd = (void *)&submit->bos[nr_bos];
7198e6b0	49
6860b56c RC	50	/* initially, until copy_from_user() and bo lookup succeeds: */
	51	submit->nr_bos = 0;
	52	submit->nr_cmds = 0;
	53
ba344afd	54	INIT_LIST_HEAD(&submit->node);
6860b56c RC	55	INIT_LIST_HEAD(&submit->bo_list);
6860b56c RC	56	ww_acquire_init(&submit->ticket, &reservation_ww_class);
7198e6b0 RC	57
	58	return submit;
	59	}
	60
40e6815b RC	61	void msm_gem_submit_free(struct msm_gem_submit *submit)
40e6815b RC	62	{
f54d1867	63	dma_fence_put(submit->fence);
40e6815b	64	list_del(&submit->node);
4816b626	65	put_pid(submit->pid);
40e6815b RC	66	kfree(submit);
	67	}
	68
89f82cbb RC	69	static inline unsigned long __must_check
	70	copy_from_user_inatomic(void to, const void __user from, unsigned long n)
	71	{
	72	if (access_ok(VERIFY_READ, from, n))
	73	return __copy_from_user_inatomic(to, from, n);
	74	return -EFAULT;
	75	}
	76
7198e6b0 RC	77	static int submit_lookup_objects(struct msm_gem_submit *submit,
	78	struct drm_msm_gem_submit args, struct drm_file file)
	79	{
	80	unsigned i;
	81	int ret = 0;
	82
	83	spin_lock(&file->table_lock);
89f82cbb	84	pagefault_disable();
7198e6b0 RC	85
	86	for (i = 0; i < args->nr_bos; i++) {
	87	struct drm_msm_gem_submit_bo submit_bo;
	88	struct drm_gem_object *obj;
	89	struct msm_gem_object *msm_obj;
	90	void __user *userptr =
3ed605bc	91	u64_to_user_ptr(args->bos + (i * sizeof(submit_bo)));
7198e6b0	92
a9e26cab RC	93	/* make sure we don't have garbage flags, in case we hit
	94	* error path before flags is initialized:
	95	*/
	96	submit->bos[i].flags = 0;
	97
89f82cbb RC	98	ret = copy_from_user_inatomic(&submit_bo, userptr, sizeof(submit_bo));
	99	if (unlikely(ret)) {
	100	pagefault_enable();
	101	spin_unlock(&file->table_lock);
	102	ret = copy_from_user(&submit_bo, userptr, sizeof(submit_bo));
	103	if (ret)
	104	goto out;
	105	spin_lock(&file->table_lock);
	106	pagefault_disable();
7198e6b0 RC	107	}
7198e6b0 RC	108
93ddb0d3	109	if (submit_bo.flags & ~MSM_SUBMIT_BO_FLAGS) {
19872533	110	DRM_ERROR("invalid flags: %x\n", submit_bo.flags);
7198e6b0 RC	111	ret = -EINVAL;
	112	goto out_unlock;
	113	}
	114
	115	submit->bos[i].flags = submit_bo.flags;
	116	/* in validate_objects() we figure out if this is true: */
	117	submit->bos[i].iova = submit_bo.presumed;
	118
	119	/* normally use drm_gem_object_lookup(), but for bulk lookup
	120	* all under single table_lock just hit object_idr directly:
	121	*/
	122	obj = idr_find(&file->object_idr, submit_bo.handle);
	123	if (!obj) {
19872533	124	DRM_ERROR("invalid handle %u at index %u\n", submit_bo.handle, i);
7198e6b0 RC	125	ret = -EINVAL;
	126	goto out_unlock;
	127	}
	128
	129	msm_obj = to_msm_bo(obj);
	130
	131	if (!list_empty(&msm_obj->submit_entry)) {
19872533	132	DRM_ERROR("handle %u at index %u already on submit list\n",
7198e6b0 RC	133	submit_bo.handle, i);
	134	ret = -EINVAL;
	135	goto out_unlock;
	136	}
	137
	138	drm_gem_object_reference(obj);
	139
	140	submit->bos[i].obj = msm_obj;
	141
	142	list_add_tail(&msm_obj->submit_entry, &submit->bo_list);
	143	}
	144
	145	out_unlock:
89f82cbb	146	pagefault_enable();
7198e6b0 RC	147	spin_unlock(&file->table_lock);
7198e6b0 RC	148
89f82cbb RC	149	out:
	150	submit->nr_bos = i;
	151
7198e6b0 RC	152	return ret;
	153	}
	154
	155	static void submit_unlock_unpin_bo(struct msm_gem_submit *submit, int i)
	156	{
	157	struct msm_gem_object *msm_obj = submit->bos[i].obj;
	158
	159	if (submit->bos[i].flags & BO_PINNED)
	160	msm_gem_put_iova(&msm_obj->base, submit->gpu->id);
	161
	162	if (submit->bos[i].flags & BO_LOCKED)
	163	ww_mutex_unlock(&msm_obj->resv->lock);
	164
	165	if (!(submit->bos[i].flags & BO_VALID))
	166	submit->bos[i].iova = 0;
	167
	168	submit->bos[i].flags &= ~(BO_LOCKED \| BO_PINNED);
	169	}
	170
	171	/* This is where we make sure all the bo's are reserved and pin'd: */
340faef2	172	static int submit_lock_objects(struct msm_gem_submit *submit)
7198e6b0 RC	173	{
	174	int contended, slow_locked = -1, i, ret = 0;
	175
	176	retry:
7198e6b0 RC	177	for (i = 0; i < submit->nr_bos; i++) {
7198e6b0 RC	178	struct msm_gem_object *msm_obj = submit->bos[i].obj;
7198e6b0 RC	179
	180	if (slow_locked == i)
	181	slow_locked = -1;
	182
	183	contended = i;
	184
	185	if (!(submit->bos[i].flags & BO_LOCKED)) {
	186	ret = ww_mutex_lock_interruptible(&msm_obj->resv->lock,
	187	&submit->ticket);
	188	if (ret)
	189	goto fail;
	190	submit->bos[i].flags \|= BO_LOCKED;
	191	}
7198e6b0 RC	192	}
	193
	194	ww_acquire_done(&submit->ticket);
	195
	196	return 0;
	197
	198	fail:
	199	for (; i >= 0; i--)
	200	submit_unlock_unpin_bo(submit, i);
	201
	202	if (slow_locked > 0)
	203	submit_unlock_unpin_bo(submit, slow_locked);
	204
	205	if (ret == -EDEADLK) {
	206	struct msm_gem_object *msm_obj = submit->bos[contended].obj;
	207	/* we lost out in a seqno race, lock and retry.. */
	208	ret = ww_mutex_lock_slow_interruptible(&msm_obj->resv->lock,
	209	&submit->ticket);
	210	if (!ret) {
	211	submit->bos[contended].flags \|= BO_LOCKED;
	212	slow_locked = contended;
	213	goto retry;
	214	}
	215	}
	216
	217	return ret;
	218	}
	219
b6295f9a RC	220	static int submit_fence_sync(struct msm_gem_submit *submit)
	221	{
	222	int i, ret = 0;
	223
	224	for (i = 0; i < submit->nr_bos; i++) {
	225	struct msm_gem_object *msm_obj = submit->bos[i].obj;
	226	bool write = submit->bos[i].flags & MSM_SUBMIT_BO_WRITE;
	227
	228	ret = msm_gem_sync_object(&msm_obj->base, submit->gpu->fctx, write);
	229	if (ret)
	230	break;
	231	}
	232
	233	return ret;
	234	}
	235
340faef2 RC	236	static int submit_pin_objects(struct msm_gem_submit *submit)
	237	{
	238	int i, ret = 0;
	239
	240	submit->valid = true;
	241
	242	for (i = 0; i < submit->nr_bos; i++) {
	243	struct msm_gem_object *msm_obj = submit->bos[i].obj;
	244	uint32_t iova;
	245
	246	/* if locking succeeded, pin bo: */
	247	ret = msm_gem_get_iova_locked(&msm_obj->base,
	248	submit->gpu->id, &iova);
	249
	250	if (ret)
	251	break;
	252
	253	submit->bos[i].flags \|= BO_PINNED;
	254
	255	if (iova == submit->bos[i].iova) {
	256	submit->bos[i].flags \|= BO_VALID;
	257	} else {
	258	submit->bos[i].iova = iova;
	259	/* iova changed, so address in cmdstream is not valid: */
	260	submit->bos[i].flags &= ~BO_VALID;
	261	submit->valid = false;
	262	}
	263	}
	264
	265	return ret;
	266	}
	267
7198e6b0 RC	268	static int submit_bo(struct msm_gem_submit *submit, uint32_t idx,
	269	struct msm_gem_object *obj, uint32_t iova, bool *valid)
	270	{
	271	if (idx >= submit->nr_bos) {
19872533 RC	272	DRM_ERROR("invalid buffer index: %u (out of %u)\n",
	273	idx, submit->nr_bos);
	274	return -EINVAL;
7198e6b0 RC	275	}
	276
	277	if (obj)
	278	*obj = submit->bos[idx].obj;
	279	if (iova)
	280	*iova = submit->bos[idx].iova;
	281	if (valid)
	282	*valid = !!(submit->bos[idx].flags & BO_VALID);
	283
	284	return 0;
	285	}
	286
	287	/* process the reloc's and patch up the cmdstream as needed: */
	288	static int submit_reloc(struct msm_gem_submit submit, struct msm_gem_object obj,
	289	uint32_t offset, uint32_t nr_relocs, uint64_t relocs)
	290	{
	291	uint32_t i, last_offset = 0;
	292	uint32_t *ptr;
	293	int ret;
	294
	295	if (offset % 4) {
19872533	296	DRM_ERROR("non-aligned cmdstream buffer: %u\n", offset);
7198e6b0 RC	297	return -EINVAL;
	298	}
	299
	300	/* For now, just map the entire thing. Eventually we probably
	301	* to do it page-by-page, w/ kmap() if not vmap()d..
	302	*/
18f23049	303	ptr = msm_gem_get_vaddr_locked(&obj->base);
7198e6b0 RC	304
	305	if (IS_ERR(ptr)) {
	306	ret = PTR_ERR(ptr);
	307	DBG("failed to map: %d", ret);
	308	return ret;
	309	}
	310
	311	for (i = 0; i < nr_relocs; i++) {
	312	struct drm_msm_gem_submit_reloc submit_reloc;
	313	void __user *userptr =
3ed605bc	314	u64_to_user_ptr(relocs + (i * sizeof(submit_reloc)));
7198e6b0 RC	315	uint32_t iova, off;
	316	bool valid;
	317
	318	ret = copy_from_user(&submit_reloc, userptr, sizeof(submit_reloc));
	319	if (ret)
	320	return -EFAULT;
	321
	322	if (submit_reloc.submit_offset % 4) {
19872533	323	DRM_ERROR("non-aligned reloc offset: %u\n",
7198e6b0 RC	324	submit_reloc.submit_offset);
	325	return -EINVAL;
	326	}
	327
	328	/* offset in dwords: */
	329	off = submit_reloc.submit_offset / 4;
	330
	331	if ((off >= (obj->base.size / 4)) \|\|
	332	(off < last_offset)) {
19872533	333	DRM_ERROR("invalid offset %u at reloc %u\n", off, i);
7198e6b0 RC	334	return -EINVAL;
	335	}
	336
	337	ret = submit_bo(submit, submit_reloc.reloc_idx, NULL, &iova, &valid);
	338	if (ret)
	339	return ret;
	340
	341	if (valid)
	342	continue;
	343
	344	iova += submit_reloc.reloc_offset;
	345
	346	if (submit_reloc.shift < 0)
	347	iova >>= -submit_reloc.shift;
	348	else
	349	iova <<= submit_reloc.shift;
	350
	351	ptr[off] = iova \| submit_reloc.or;
	352
	353	last_offset = off;
	354	}
	355
18f23049 RC	356	msm_gem_put_vaddr_locked(&obj->base);
18f23049 RC	357
7198e6b0 RC	358	return 0;
	359	}
	360
40e6815b	361	static void submit_cleanup(struct msm_gem_submit *submit)
7198e6b0 RC	362	{
	363	unsigned i;
	364
7198e6b0 RC	365	for (i = 0; i < submit->nr_bos; i++) {
	366	struct msm_gem_object *msm_obj = submit->bos[i].obj;
	367	submit_unlock_unpin_bo(submit, i);
	368	list_del_init(&msm_obj->submit_entry);
	369	drm_gem_object_unreference(&msm_obj->base);
	370	}
7198e6b0 RC	371
7198e6b0 RC	372	ww_acquire_fini(&submit->ticket);
7198e6b0 RC	373	}
	374
	375	int msm_ioctl_gem_submit(struct drm_device dev, void data,
	376	struct drm_file *file)
	377	{
	378	struct msm_drm_private *priv = dev->dev_private;
	379	struct drm_msm_gem_submit *args = data;
	380	struct msm_file_private *ctx = file->driver_priv;
	381	struct msm_gem_submit *submit;
c01a958e	382	struct msm_gpu *gpu = priv->gpu;
f54d1867	383	struct dma_fence *in_fence = NULL;
4cd09459 RC	384	struct sync_file *sync_file = NULL;
4cd09459 RC	385	int out_fence_fd = -1;
7198e6b0 RC	386	unsigned i;
	387	int ret;
	388
c01a958e RC	389	if (!gpu)
	390	return -ENXIO;
	391
7198e6b0 RC	392	/* for now, we just have 3d pipe.. eventually this would need to
	393	* be more clever to dispatch to appropriate gpu module:
	394	*/
d9c181e2 RC	395	if (MSM_PIPE_ID(args->flags) != MSM_PIPE_3D0)
	396	return -EINVAL;
	397
	398	if (MSM_PIPE_FLAGS(args->flags) & ~MSM_SUBMIT_FLAGS)
7198e6b0 RC	399	return -EINVAL;
7198e6b0 RC	400
b5b4c264 RC	401	ret = mutex_lock_interruptible(&dev->struct_mutex);
	402	if (ret)
	403	return ret;
687f084a	404
4cd09459 RC	405	if (args->flags & MSM_SUBMIT_FENCE_FD_OUT) {
	406	out_fence_fd = get_unused_fd_flags(O_CLOEXEC);
	407	if (out_fence_fd < 0) {
	408	ret = out_fence_fd;
	409	goto out_unlock;
	410	}
	411	}
d78d383a	412	priv->struct_mutex_task = current;
4cd09459	413
6b597ce2	414	submit = submit_create(dev, gpu, args->nr_bos, args->nr_cmds);
b5b4c264 RC	415	if (!submit) {
	416	ret = -ENOMEM;
	417	goto out_unlock;
	418	}
7198e6b0 RC	419
	420	ret = submit_lookup_objects(submit, args, file);
	421	if (ret)
	422	goto out;
	423
340faef2 RC	424	ret = submit_lock_objects(submit);
	425	if (ret)
	426	goto out;
	427
f0a42bb5 RC	428	if (args->flags & MSM_SUBMIT_FENCE_FD_IN) {
	429	in_fence = sync_file_get_fence(args->fence_fd);
	430
	431	if (!in_fence) {
	432	ret = -EINVAL;
	433	goto out;
	434	}
	435
	436	/* TODO if we get an array-fence due to userspace merging multiple
	437	* fences, we need a way to determine if all the backing fences
	438	* are from our own context..
	439	*/
	440
	441	if (in_fence->context != gpu->fctx->context) {
f54d1867	442	ret = dma_fence_wait(in_fence, true);
f0a42bb5 RC	443	if (ret)
	444	goto out;
	445	}
	446
	447	}
	448
	449	if (!(args->fence & MSM_SUBMIT_NO_IMPLICIT)) {
	450	ret = submit_fence_sync(submit);
	451	if (ret)
	452	goto out;
	453	}
b6295f9a	454
340faef2	455	ret = submit_pin_objects(submit);
7198e6b0 RC	456	if (ret)
	457	goto out;
	458
	459	for (i = 0; i < args->nr_cmds; i++) {
	460	struct drm_msm_gem_submit_cmd submit_cmd;
	461	void __user *userptr =
3ed605bc	462	u64_to_user_ptr(args->cmds + (i * sizeof(submit_cmd)));
7198e6b0 RC	463	struct msm_gem_object *msm_obj;
	464	uint32_t iova;
	465
	466	ret = copy_from_user(&submit_cmd, userptr, sizeof(submit_cmd));
	467	if (ret) {
	468	ret = -EFAULT;
	469	goto out;
	470	}
	471
93ddb0d3 RC	472	/* validate input from userspace: */
	473	switch (submit_cmd.type) {
	474	case MSM_SUBMIT_CMD_BUF:
	475	case MSM_SUBMIT_CMD_IB_TARGET_BUF:
	476	case MSM_SUBMIT_CMD_CTX_RESTORE_BUF:
	477	break;
	478	default:
	479	DRM_ERROR("invalid type: %08x\n", submit_cmd.type);
	480	ret = -EINVAL;
	481	goto out;
	482	}
	483
7198e6b0 RC	484	ret = submit_bo(submit, submit_cmd.submit_idx,
	485	&msm_obj, &iova, NULL);
	486	if (ret)
	487	goto out;
	488
	489	if (submit_cmd.size % 4) {
19872533	490	DRM_ERROR("non-aligned cmdstream buffer size: %u\n",
7198e6b0 RC	491	submit_cmd.size);
	492	ret = -EINVAL;
	493	goto out;
	494	}
	495
19872533 RC	496	if ((submit_cmd.size + submit_cmd.submit_offset) >=
	497	msm_obj->base.size) {
	498	DRM_ERROR("invalid cmdstream size: %u\n", submit_cmd.size);
7198e6b0 RC	499	ret = -EINVAL;
	500	goto out;
	501	}
	502
	503	submit->cmd[i].type = submit_cmd.type;
	504	submit->cmd[i].size = submit_cmd.size / 4;
	505	submit->cmd[i].iova = iova + submit_cmd.submit_offset;
a7d3c950	506	submit->cmd[i].idx = submit_cmd.submit_idx;
7198e6b0 RC	507
	508	if (submit->valid)
	509	continue;
	510
	511	ret = submit_reloc(submit, msm_obj, submit_cmd.submit_offset,
	512	submit_cmd.nr_relocs, submit_cmd.relocs);
	513	if (ret)
	514	goto out;
	515	}
	516
	517	submit->nr_cmds = i;
	518
f44d32c7 RC	519	submit->fence = msm_fence_alloc(gpu->fctx);
	520	if (IS_ERR(submit->fence)) {
	521	ret = PTR_ERR(submit->fence);
	522	submit->fence = NULL;
	523	goto out;
	524	}
	525
4cd09459 RC	526	if (args->flags & MSM_SUBMIT_FENCE_FD_OUT) {
	527	sync_file = sync_file_create(submit->fence);
	528	if (!sync_file) {
	529	ret = -ENOMEM;
	530	goto out;
	531	}
	532	}
	533
f44d32c7	534	msm_gpu_submit(gpu, submit, ctx);
7198e6b0	535
b6295f9a	536	args->fence = submit->fence->seqno;
7198e6b0	537
4cd09459 RC	538	if (args->flags & MSM_SUBMIT_FENCE_FD_OUT) {
	539	fd_install(out_fence_fd, sync_file->file);
	540	args->fence_fd = out_fence_fd;
	541	}
	542
7198e6b0	543	out:
f0a42bb5	544	if (in_fence)
f54d1867	545	dma_fence_put(in_fence);
40e6815b RC	546	submit_cleanup(submit);
	547	if (ret)
	548	msm_gem_submit_free(submit);
b5b4c264	549	out_unlock:
4cd09459 RC	550	if (ret && (out_fence_fd >= 0))
4cd09459 RC	551	put_unused_fd(out_fence_fd);
d78d383a	552	priv->struct_mutex_task = NULL;
c2703b13	553	mutex_unlock(&dev->struct_mutex);
7198e6b0 RC	554	return ret;
7198e6b0 RC	555	}