[thirdparty/linux.git] / drivers / gpu / drm / etnaviv / etnaviv_gem_submit.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * Copyright (C) 2015 Etnaviv Project
 */

#include <drm/drm_file.h>
#include <linux/dma-fence-array.h>
#include <linux/file.h>
#include <linux/pm_runtime.h>
#include <linux/dma-resv.h>
#include <linux/sync_file.h>
#include <linux/uaccess.h>
#include <linux/vmalloc.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;
		if (submit->flags & ETNA_SUBMIT_SOFTPIN) {
			if (bo->presumed < ETNAVIV_SOFTPIN_START_ADDRESS) {
				DRM_ERROR("invalid softpin address\n");
				ret = -EINVAL;
				goto out_unlock;
			}
			submit->bos[i].va = 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, 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 drm_gem_object *obj = &submit->bos[i].obj->base;

		dma_resv_unlock(obj->resv);
		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 drm_gem_object *obj = &submit->bos[i].obj->base;

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

		contended = i;

		if (!(submit->bos[i].flags & BO_LOCKED)) {
			ret = dma_resv_lock_interruptible(obj->resv, 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 drm_gem_object *obj;

		obj = &submit->bos[contended].obj->base;

		/* we lost out in a seqno race, lock and retry.. */
		ret = dma_resv_lock_slow_interruptible(obj->resv, 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 dma_resv *robj = bo->obj->base.resv;

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

		if (submit->flags & ETNA_SUBMIT_NO_IMPLICIT)
			continue;

		if (bo->flags & ETNA_SUBMIT_BO_WRITE) {
			ret = dma_resv_get_fences_rcu(robj, &bo->excl,
								&bo->nr_shared,
								&bo->shared);
			if (ret)
				return ret;
		} else {
			bo->excl = dma_resv_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 drm_gem_object *obj = &submit->bos[i].obj->base;

		if (submit->bos[i].flags & ETNA_SUBMIT_BO_WRITE)
			dma_resv_add_excl_fence(obj->resv,
							  submit->out_fence);
		else
			dma_resv_add_shared_fence(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->mmu_context,
						  submit->bos[i].va);
		if (IS_ERR(mapping)) {
			ret = PTR_ERR(mapping);
			break;
		}

		if ((submit->flags & ETNA_SUBMIT_SOFTPIN) &&
		     submit->bos[i].va != mapping->iova) {
			etnaviv_gem_mapping_unreference(mapping);
			return -EINVAL;
		}

		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;

	/* Submits using softpin don't blend with relocs */
	if ((submit->flags & ETNA_SUBMIT_SOFTPIN) && nr_relocs != 0)
		return -EINVAL;

	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);

	if (submit->mmu_context)
		etnaviv_iommu_context_put(submit->mmu_context);

	if (submit->prev_mmu_context)
		etnaviv_iommu_context_put(submit->prev_mmu_context);

	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;
	}

	if ((args->flags & ETNA_SUBMIT_SOFTPIN) &&
	    priv->mmu_global->version != ETNAVIV_IOMMU_V2) {
		DRM_ERROR("softpin requested on incompatible MMU\n");
		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(priv->cmdbuf_suballoc, &submit->cmdbuf,
				  ALIGN(args->stream_size, 8) + 8);
	if (ret)
		goto err_submit_objects;

	submit->ctx = file->driver_priv;
	etnaviv_iommu_context_get(submit->ctx->mmu);
	submit->mmu_context = submit->ctx->mmu;
	submit->exec_state = args->exec_state;
	submit->flags = args->flags;

	ret = submit_lookup_objects(submit, file, bos, args->nr_bos);
	if (ret)
		goto err_submit_objects;

	if ((priv->mmu_global->version != ETNAVIV_IOMMU_V2) &&
	    !etnaviv_cmd_validate_one(gpu, stream, args->stream_size / 4,
				      relocs, args->nr_relocs)) {
		ret = -EINVAL;
		goto err_submit_objects;
	}

	if (args->flags & ETNA_SUBMIT_FENCE_FD_IN) {
		submit->in_fence = sync_file_get_fence(args->fence_fd);
		if (!submit->in_fence) {
			ret = -EINVAL;
			goto err_submit_objects;
		}
	}

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

	ret = submit_reloc(submit, stream, args->stream_size / 4,
			   relocs, args->nr_relocs);
	if (ret)
		goto err_submit_objects;

	ret = submit_perfmon_validate(submit, args->exec_state, pmrs);
	if (ret)
		goto err_submit_objects;

	memcpy(submit->cmdbuf.vaddr, stream, args->stream_size);

	ret = submit_lock_objects(submit, &ticket);
	if (ret)
		goto err_submit_objects;

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

	ret = etnaviv_sched_push_job(&ctx->sched_entity[args->pipe], submit);
	if (ret)
		goto err_submit_objects;

	submit_attach_object_fences(submit);

	if (args->flags & ETNA_SUBMIT_FENCE_FD_OUT) {
		/*
		 * This can be improved: ideally we want to allocate the sync
		 * file before kicking off the GPU job and just attach the
		 * fence to the sync file here, eliminating the ENOMEM
		 * possibility at this stage.
		 */
		sync_file = sync_file_create(submit->out_fence);
		if (!sync_file) {
			ret = -ENOMEM;
			goto err_submit_objects;
		}
		fd_install(out_fence_fd, sync_file->file);
	}

	args->fence_fd = out_fence_fd;
	args->fence = submit->out_fence_id;

err_submit_objects:
	etnaviv_submit_put(submit);

err_submit_ww_acquire:
	ww_acquire_fini(&ticket);

err_submit_cmds:
	if (ret && (out_fence_fd >= 0))
		put_unused_fd(out_fence_fd);
	if (stream)
		kvfree(stream);
	if (bos)
		kvfree(bos);
	if (relocs)
		kvfree(relocs);
	if (pmrs)
		kvfree(pmrs);

	return ret;
}
Commit	Line	Data
caab277b	1	// SPDX-License-Identifier: GPL-2.0-only
a8c21a54 T	2	/*
a8c21a54 T	3	* Copyright (C) 2015 Etnaviv Project
a8c21a54 T	4	*/
a8c21a54 T	5
6eae41fe	6	#include <drm/drm_file.h>
9ad59fea	7	#include <linux/dma-fence-array.h>
6eae41fe	8	#include <linux/file.h>
2e737e52	9	#include <linux/pm_runtime.h>
52791eee	10	#include <linux/dma-resv.h>
9ad59fea	11	#include <linux/sync_file.h>
6eae41fe SR	12	#include <linux/uaccess.h>
	13	#include <linux/vmalloc.h>
	14
ea1f5729	15	#include "etnaviv_cmdbuf.h"
a8c21a54 T	16	#include "etnaviv_drv.h"
	17	#include "etnaviv_gpu.h"
	18	#include "etnaviv_gem.h"
c8e4a7fd	19	#include "etnaviv_perfmon.h"
e93b6dee	20	#include "etnaviv_sched.h"
a8c21a54 T	21
	22	/*
	23	* Cmdstream submission:
	24	*/
	25
	26	#define BO_INVALID_FLAGS ~(ETNA_SUBMIT_BO_READ \| ETNA_SUBMIT_BO_WRITE)
	27	/* make sure these don't conflict w/ ETNAVIV_SUBMIT_BO_x */
	28	#define BO_LOCKED 0x4000
	29	#define BO_PINNED 0x2000
	30
a8c21a54	31	static struct etnaviv_gem_submit submit_create(struct drm_device dev,
ef146c00	32	struct etnaviv_gpu *gpu, size_t nr_bos, size_t nr_pmrs)
a8c21a54 T	33	{
a8c21a54 T	34	struct etnaviv_gem_submit *submit;
ef146c00	35	size_t sz = size_vstruct(nr_bos, sizeof(submit->bos[0]), sizeof(*submit));
a8c21a54	36
c5283723 LS	37	submit = kzalloc(sz, GFP_KERNEL);
	38	if (!submit)
	39	return NULL;
a8c21a54	40
ef146c00 LS	41	submit->pmrs = kcalloc(nr_pmrs, sizeof(struct etnaviv_perfmon_request),
	42	GFP_KERNEL);
	43	if (!submit->pmrs) {
	44	kfree(submit);
	45	return NULL;
	46	}
	47	submit->nr_pmrs = nr_pmrs;
	48
c5283723	49	submit->gpu = gpu;
e0329e6c	50	kref_init(&submit->refcount);
a8c21a54	51
a8c21a54 T	52	return submit;
	53	}
	54
	55	static int submit_lookup_objects(struct etnaviv_gem_submit *submit,
	56	struct drm_file file, struct drm_etnaviv_gem_submit_bo submit_bos,
	57	unsigned nr_bos)
	58	{
	59	struct drm_etnaviv_gem_submit_bo *bo;
	60	unsigned i;
	61	int ret = 0;
	62
	63	spin_lock(&file->table_lock);
	64
	65	for (i = 0, bo = submit_bos; i < nr_bos; i++, bo++) {
	66	struct drm_gem_object *obj;
	67
	68	if (bo->flags & BO_INVALID_FLAGS) {
	69	DRM_ERROR("invalid flags: %x\n", bo->flags);
	70	ret = -EINVAL;
	71	goto out_unlock;
	72	}
	73
	74	submit->bos[i].flags = bo->flags;
088880dd LS	75	if (submit->flags & ETNA_SUBMIT_SOFTPIN) {
	76	if (bo->presumed < ETNAVIV_SOFTPIN_START_ADDRESS) {
	77	DRM_ERROR("invalid softpin address\n");
	78	ret = -EINVAL;
	79	goto out_unlock;
	80	}
	81	submit->bos[i].va = bo->presumed;
	82	}
a8c21a54 T	83
	84	/* normally use drm_gem_object_lookup(), but for bulk lookup
	85	* all under single table_lock just hit object_idr directly:
	86	*/
	87	obj = idr_find(&file->object_idr, bo->handle);
	88	if (!obj) {
	89	DRM_ERROR("invalid handle %u at index %u\n",
	90	bo->handle, i);
	91	ret = -EINVAL;
	92	goto out_unlock;
	93	}
	94
	95	/*
	96	* Take a refcount on the object. The file table lock
	97	* prevents the object_idr's refcount on this being dropped.
	98	*/
23d1dd03	99	drm_gem_object_get(obj);
a8c21a54 T	100
	101	submit->bos[i].obj = to_etnaviv_bo(obj);
	102	}
	103
	104	out_unlock:
	105	submit->nr_bos = i;
	106	spin_unlock(&file->table_lock);
	107
	108	return ret;
	109	}
	110
	111	static void submit_unlock_object(struct etnaviv_gem_submit *submit, int i)
	112	{
	113	if (submit->bos[i].flags & BO_LOCKED) {
fa238ea1	114	struct drm_gem_object *obj = &submit->bos[i].obj->base;
a8c21a54	115
caa2a778	116	dma_resv_unlock(obj->resv);
a8c21a54 T	117	submit->bos[i].flags &= ~BO_LOCKED;
	118	}
	119	}
	120
08301d73 LS	121	static int submit_lock_objects(struct etnaviv_gem_submit *submit,
08301d73 LS	122	struct ww_acquire_ctx *ticket)
a8c21a54 T	123	{
	124	int contended, slow_locked = -1, i, ret = 0;
	125
	126	retry:
	127	for (i = 0; i < submit->nr_bos; i++) {
fa238ea1	128	struct drm_gem_object *obj = &submit->bos[i].obj->base;
a8c21a54 T	129
	130	if (slow_locked == i)
	131	slow_locked = -1;
	132
	133	contended = i;
	134
	135	if (!(submit->bos[i].flags & BO_LOCKED)) {
caa2a778	136	ret = dma_resv_lock_interruptible(obj->resv, ticket);
a8c21a54 T	137	if (ret == -EALREADY)
	138	DRM_ERROR("BO at index %u already on submit list\n",
	139	i);
	140	if (ret)
	141	goto fail;
	142	submit->bos[i].flags \|= BO_LOCKED;
	143	}
	144	}
	145
08301d73	146	ww_acquire_done(ticket);
a8c21a54 T	147
	148	return 0;
	149
	150	fail:
	151	for (; i >= 0; i--)
	152	submit_unlock_object(submit, i);
	153
	154	if (slow_locked > 0)
	155	submit_unlock_object(submit, slow_locked);
	156
	157	if (ret == -EDEADLK) {
fa238ea1	158	struct drm_gem_object *obj;
a8c21a54	159
fa238ea1	160	obj = &submit->bos[contended].obj->base;
a8c21a54 T	161
a8c21a54 T	162	/* we lost out in a seqno race, lock and retry.. */
caa2a778	163	ret = dma_resv_lock_slow_interruptible(obj->resv, ticket);
a8c21a54 T	164	if (!ret) {
	165	submit->bos[contended].flags \|= BO_LOCKED;
	166	slow_locked = contended;
	167	goto retry;
	168	}
	169	}
	170
	171	return ret;
	172	}
	173
683da226	174	static int submit_fence_sync(struct etnaviv_gem_submit *submit)
a8c21a54	175	{
a8c21a54 T	176	int i, ret = 0;
	177
	178	for (i = 0; i < submit->nr_bos; i++) {
683da226	179	struct etnaviv_gem_submit_bo *bo = &submit->bos[i];
52791eee	180	struct dma_resv *robj = bo->obj->base.resv;
a8c21a54	181
683da226	182	if (!(bo->flags & ETNA_SUBMIT_BO_WRITE)) {
52791eee	183	ret = dma_resv_reserve_shared(robj, 1);
683da226 LS	184	if (ret)
	185	return ret;
	186	}
	187
	188	if (submit->flags & ETNA_SUBMIT_NO_IMPLICIT)
	189	continue;
	190
	191	if (bo->flags & ETNA_SUBMIT_BO_WRITE) {
52791eee	192	ret = dma_resv_get_fences_rcu(robj, &bo->excl,
683da226 LS	193	&bo->nr_shared,
	194	&bo->shared);
	195	if (ret)
	196	return ret;
	197	} else {
52791eee	198	bo->excl = dma_resv_get_excl_rcu(robj);
683da226	199	}
a8c21a54	200
9efabd73 LS	201	}
9efabd73 LS	202
a8c21a54 T	203	return ret;
	204	}
	205
0236efe9 LS	206	static void submit_attach_object_fences(struct etnaviv_gem_submit *submit)
	207	{
	208	int i;
	209
	210	for (i = 0; i < submit->nr_bos; i++) {
fa238ea1	211	struct drm_gem_object *obj = &submit->bos[i].obj->base;
0236efe9 LS	212
0236efe9 LS	213	if (submit->bos[i].flags & ETNA_SUBMIT_BO_WRITE)
52791eee	214	dma_resv_add_excl_fence(obj->resv,
10009ea2	215	submit->out_fence);
0236efe9	216	else
52791eee	217	dma_resv_add_shared_fence(obj->resv,
10009ea2	218	submit->out_fence);
0236efe9 LS	219
	220	submit_unlock_object(submit, i);
	221	}
	222	}
	223
a8c21a54 T	224	static int submit_pin_objects(struct etnaviv_gem_submit *submit)
	225	{
	226	int i, ret = 0;
	227
	228	for (i = 0; i < submit->nr_bos; i++) {
	229	struct etnaviv_gem_object *etnaviv_obj = submit->bos[i].obj;
b6325f40	230	struct etnaviv_vram_mapping *mapping;
a8c21a54	231
b6325f40	232	mapping = etnaviv_gem_mapping_get(&etnaviv_obj->base,
088880dd LS	233	submit->mmu_context,
088880dd LS	234	submit->bos[i].va);
b6325f40 RK	235	if (IS_ERR(mapping)) {
b6325f40 RK	236	ret = PTR_ERR(mapping);
a8c21a54	237	break;
b6325f40	238	}
088880dd LS	239
088880dd LS	240	if ((submit->flags & ETNA_SUBMIT_SOFTPIN) &&
ad99cb5e DC	241	submit->bos[i].va != mapping->iova) {
ad99cb5e DC	242	etnaviv_gem_mapping_unreference(mapping);
088880dd	243	return -EINVAL;
ad99cb5e	244	}
088880dd	245
5b223e94	246	atomic_inc(&etnaviv_obj->gpu_active);
a8c21a54 T	247
a8c21a54 T	248	submit->bos[i].flags \|= BO_PINNED;
b6325f40	249	submit->bos[i].mapping = mapping;
a8c21a54 T	250	}
	251
	252	return ret;
	253	}
	254
	255	static int submit_bo(struct etnaviv_gem_submit *submit, u32 idx,
8779aa8f	256	struct etnaviv_gem_submit_bo **bo)
a8c21a54 T	257	{
	258	if (idx >= submit->nr_bos) {
	259	DRM_ERROR("invalid buffer index: %u (out of %u)\n",
	260	idx, submit->nr_bos);
	261	return -EINVAL;
	262	}
	263
8779aa8f	264	*bo = &submit->bos[idx];
a8c21a54 T	265
	266	return 0;
	267	}
	268
	269	/* process the reloc's and patch up the cmdstream as needed: */
	270	static int submit_reloc(struct etnaviv_gem_submit submit, void stream,
	271	u32 size, const struct drm_etnaviv_gem_submit_reloc *relocs,
	272	u32 nr_relocs)
	273	{
	274	u32 i, last_offset = 0;
	275	u32 *ptr = stream;
	276	int ret;
	277
088880dd LS	278	/* Submits using softpin don't blend with relocs */
	279	if ((submit->flags & ETNA_SUBMIT_SOFTPIN) && nr_relocs != 0)
	280	return -EINVAL;
	281
a8c21a54 T	282	for (i = 0; i < nr_relocs; i++) {
a8c21a54 T	283	const struct drm_etnaviv_gem_submit_reloc *r = relocs + i;
8779aa8f RK	284	struct etnaviv_gem_submit_bo *bo;
8779aa8f RK	285	u32 off;
a8c21a54 T	286
	287	if (unlikely(r->flags)) {
	288	DRM_ERROR("invalid reloc flags\n");
	289	return -EINVAL;
	290	}
	291
	292	if (r->submit_offset % 4) {
	293	DRM_ERROR("non-aligned reloc offset: %u\n",
	294	r->submit_offset);
	295	return -EINVAL;
	296	}
	297
	298	/* offset in dwords: */
	299	off = r->submit_offset / 4;
	300
	301	if ((off >= size ) \|\|
	302	(off < last_offset)) {
	303	DRM_ERROR("invalid offset %u at reloc %u\n", off, i);
	304	return -EINVAL;
	305	}
	306
8779aa8f	307	ret = submit_bo(submit, r->reloc_idx, &bo);
a8c21a54 T	308	if (ret)
	309	return ret;
	310
d6f756e0 WL	311	if (r->reloc_offset > bo->obj->base.size - sizeof(*ptr)) {
d6f756e0 WL	312	DRM_ERROR("relocation %u outside object\n", i);
a8c21a54 T	313	return -EINVAL;
	314	}
	315
8779aa8f	316	ptr[off] = bo->mapping->iova + r->reloc_offset;
a8c21a54 T	317
	318	last_offset = off;
	319	}
	320
	321	return 0;
	322	}
	323
c8e4a7fd	324	static int submit_perfmon_validate(struct etnaviv_gem_submit *submit,
ef146c00	325	u32 exec_state, const struct drm_etnaviv_gem_submit_pmr *pmrs)
c8e4a7fd CG	326	{
	327	u32 i;
	328
ef146c00	329	for (i = 0; i < submit->nr_pmrs; i++) {
c8e4a7fd CG	330	const struct drm_etnaviv_gem_submit_pmr *r = pmrs + i;
	331	struct etnaviv_gem_submit_bo *bo;
	332	int ret;
	333
	334	ret = submit_bo(submit, r->read_idx, &bo);
	335	if (ret)
	336	return ret;
	337
	338	/* at offset 0 a sequence number gets stored used for userspace sync */
	339	if (r->read_offset == 0) {
	340	DRM_ERROR("perfmon request: offset is 0");
	341	return -EINVAL;
	342	}
	343
	344	if (r->read_offset >= bo->obj->base.size - sizeof(u32)) {
	345	DRM_ERROR("perfmon request: offset %u outside object", i);
	346	return -EINVAL;
	347	}
	348
	349	if (r->flags & ~(ETNA_PM_PROCESS_PRE \| ETNA_PM_PROCESS_POST)) {
	350	DRM_ERROR("perfmon request: flags are not valid");
	351	return -EINVAL;
	352	}
	353
ef146c00	354	if (etnaviv_pm_req_validate(r, exec_state)) {
c8e4a7fd CG	355	DRM_ERROR("perfmon request: domain or signal not valid");
	356	return -EINVAL;
	357	}
	358
ef146c00 LS	359	submit->pmrs[i].flags = r->flags;
	360	submit->pmrs[i].domain = r->domain;
	361	submit->pmrs[i].signal = r->signal;
	362	submit->pmrs[i].sequence = r->sequence;
	363	submit->pmrs[i].offset = r->read_offset;
	364	submit->pmrs[i].bo_vma = etnaviv_gem_vmap(&bo->obj->base);
c8e4a7fd CG	365	}
	366
	367	return 0;
	368	}
	369
e0329e6c	370	static void submit_cleanup(struct kref *kref)
a8c21a54	371	{
e0329e6c LS	372	struct etnaviv_gem_submit *submit =
e0329e6c LS	373	container_of(kref, struct etnaviv_gem_submit, refcount);
a8c21a54 T	374	unsigned i;
a8c21a54 T	375
8bda1516 LS	376	if (submit->runtime_resumed)
	377	pm_runtime_put_autosuspend(submit->gpu->dev);
	378
2f9225db LS	379	if (submit->cmdbuf.suballoc)
	380	etnaviv_cmdbuf_free(&submit->cmdbuf);
	381
17e4660a LS	382	if (submit->mmu_context)
	383	etnaviv_iommu_context_put(submit->mmu_context);
	384
	385	if (submit->prev_mmu_context)
	386	etnaviv_iommu_context_put(submit->prev_mmu_context);
	387
a8c21a54 T	388	for (i = 0; i < submit->nr_bos; i++) {
	389	struct etnaviv_gem_object *etnaviv_obj = submit->bos[i].obj;
	390
33a63e68 LS	391	/* unpin all objects */
	392	if (submit->bos[i].flags & BO_PINNED) {
	393	etnaviv_gem_mapping_unreference(submit->bos[i].mapping);
5b223e94	394	atomic_dec(&etnaviv_obj->gpu_active);
33a63e68 LS	395	submit->bos[i].mapping = NULL;
	396	submit->bos[i].flags &= ~BO_PINNED;
	397	}
	398
0236efe9	399	/* if the GPU submit failed, objects might still be locked */
a8c21a54	400	submit_unlock_object(submit, i);
23d1dd03	401	drm_gem_object_put_unlocked(&etnaviv_obj->base);
a8c21a54 T	402	}
a8c21a54 T	403
5b223e94 LS	404	wake_up_all(&submit->gpu->fence_event);
5b223e94 LS	405
9efabd73 LS	406	if (submit->in_fence)
9efabd73 LS	407	dma_fence_put(submit->in_fence);
e93b6dee LS	408	if (submit->out_fence) {
e93b6dee LS	409	/* first remove from IDR, so fence can not be found anymore */
a0780bb1	410	mutex_lock(&submit->gpu->fence_lock);
e93b6dee	411	idr_remove(&submit->gpu->fence_idr, submit->out_fence_id);
a0780bb1	412	mutex_unlock(&submit->gpu->fence_lock);
10009ea2	413	dma_fence_put(submit->out_fence);
e93b6dee	414	}
ef146c00	415	kfree(submit->pmrs);
a8c21a54 T	416	kfree(submit);
	417	}
	418
e0329e6c LS	419	void etnaviv_submit_put(struct etnaviv_gem_submit *submit)
	420	{
	421	kref_put(&submit->refcount, submit_cleanup);
	422	}
	423
a8c21a54 T	424	int etnaviv_ioctl_gem_submit(struct drm_device dev, void data,
	425	struct drm_file *file)
	426	{
e93b6dee	427	struct etnaviv_file_private *ctx = file->driver_priv;
a8c21a54 T	428	struct etnaviv_drm_private *priv = dev->dev_private;
	429	struct drm_etnaviv_gem_submit *args = data;
	430	struct drm_etnaviv_gem_submit_reloc *relocs;
c8e4a7fd	431	struct drm_etnaviv_gem_submit_pmr *pmrs;
a8c21a54 T	432	struct drm_etnaviv_gem_submit_bo *bos;
a8c21a54 T	433	struct etnaviv_gem_submit *submit;
a8c21a54	434	struct etnaviv_gpu *gpu;
78ec187f	435	struct sync_file *sync_file = NULL;
08301d73	436	struct ww_acquire_ctx ticket;
78ec187f	437	int out_fence_fd = -1;
a8c21a54 T	438	void *stream;
	439	int ret;
	440
	441	if (args->pipe >= ETNA_MAX_PIPES)
	442	return -EINVAL;
	443
	444	gpu = priv->gpu[args->pipe];
	445	if (!gpu)
	446	return -ENXIO;
	447
	448	if (args->stream_size % 4) {
	449	DRM_ERROR("non-aligned cmdstream buffer size: %u\n",
	450	args->stream_size);
	451	return -EINVAL;
	452	}
	453
	454	if (args->exec_state != ETNA_PIPE_3D &&
	455	args->exec_state != ETNA_PIPE_2D &&
	456	args->exec_state != ETNA_PIPE_VG) {
	457	DRM_ERROR("invalid exec_state: 0x%x\n", args->exec_state);
	458	return -EINVAL;
	459	}
	460
9ad59fea PZ	461	if (args->flags & ~ETNA_SUBMIT_FLAGS) {
	462	DRM_ERROR("invalid flags: 0x%x\n", args->flags);
	463	return -EINVAL;
	464	}
	465
088880dd LS	466	if ((args->flags & ETNA_SUBMIT_SOFTPIN) &&
	467	priv->mmu_global->version != ETNAVIV_IOMMU_V2) {
	468	DRM_ERROR("softpin requested on incompatible MMU\n");
	469	return -EINVAL;
	470	}
	471
a8c21a54 T	472	/*
	473	* Copy the command submission and bo array to kernel space in
	474	* one go, and do this outside of any locks.
	475	*/
2098105e MH	476	bos = kvmalloc_array(args->nr_bos, sizeof(*bos), GFP_KERNEL);
2098105e MH	477	relocs = kvmalloc_array(args->nr_relocs, sizeof(*relocs), GFP_KERNEL);
c8e4a7fd	478	pmrs = kvmalloc_array(args->nr_pmrs, sizeof(*pmrs), GFP_KERNEL);
2098105e	479	stream = kvmalloc_array(1, args->stream_size, GFP_KERNEL);
2f9225db	480	if (!bos \|\| !relocs \|\| !pmrs \|\| !stream) {
a8c21a54 T	481	ret = -ENOMEM;
	482	goto err_submit_cmds;
	483	}
	484
3ed605bc	485	ret = copy_from_user(bos, u64_to_user_ptr(args->bos),
a8c21a54 T	486	args->nr_bos * sizeof(*bos));
	487	if (ret) {
	488	ret = -EFAULT;
	489	goto err_submit_cmds;
	490	}
	491
3ed605bc	492	ret = copy_from_user(relocs, u64_to_user_ptr(args->relocs),
a8c21a54 T	493	args->nr_relocs * sizeof(*relocs));
	494	if (ret) {
	495	ret = -EFAULT;
	496	goto err_submit_cmds;
	497	}
	498
c8e4a7fd CG	499	ret = copy_from_user(pmrs, u64_to_user_ptr(args->pmrs),
	500	args->nr_pmrs * sizeof(*pmrs));
	501	if (ret) {
	502	ret = -EFAULT;
	503	goto err_submit_cmds;
	504	}
c8e4a7fd	505
3ed605bc	506	ret = copy_from_user(stream, u64_to_user_ptr(args->stream),
a8c21a54 T	507	args->stream_size);
	508	if (ret) {
	509	ret = -EFAULT;
	510	goto err_submit_cmds;
	511	}
	512
78ec187f PZ	513	if (args->flags & ETNA_SUBMIT_FENCE_FD_OUT) {
	514	out_fence_fd = get_unused_fd_flags(O_CLOEXEC);
	515	if (out_fence_fd < 0) {
	516	ret = out_fence_fd;
	517	goto err_submit_cmds;
	518	}
	519	}
	520
08301d73 LS	521	ww_acquire_init(&ticket, &reservation_ww_class);
08301d73 LS	522
ef146c00	523	submit = submit_create(dev, gpu, args->nr_bos, args->nr_pmrs);
a8c21a54 T	524	if (!submit) {
a8c21a54 T	525	ret = -ENOMEM;
08301d73	526	goto err_submit_ww_acquire;
a8c21a54 T	527	}
a8c21a54 T	528
bffe5db8	529	ret = etnaviv_cmdbuf_init(priv->cmdbuf_suballoc, &submit->cmdbuf,
2f9225db LS	530	ALIGN(args->stream_size, 8) + 8);
	531	if (ret)
	532	goto err_submit_objects;
	533
72ac64b8	534	submit->ctx = file->driver_priv;
17e4660a LS	535	etnaviv_iommu_context_get(submit->ctx->mmu);
17e4660a LS	536	submit->mmu_context = submit->ctx->mmu;
797b0159	537	submit->exec_state = args->exec_state;
9ad59fea PZ	538	submit->flags = args->flags;
9ad59fea PZ	539
a8c21a54 T	540	ret = submit_lookup_objects(submit, file, bos, args->nr_bos);
	541	if (ret)
	542	goto err_submit_objects;
	543
edb5ff07 LS	544	if ((priv->mmu_global->version != ETNAVIV_IOMMU_V2) &&
edb5ff07 LS	545	!etnaviv_cmd_validate_one(gpu, stream, args->stream_size / 4,
a8c21a54 T	546	relocs, args->nr_relocs)) {
	547	ret = -EINVAL;
	548	goto err_submit_objects;
	549	}
	550
9ad59fea	551	if (args->flags & ETNA_SUBMIT_FENCE_FD_IN) {
9efabd73 LS	552	submit->in_fence = sync_file_get_fence(args->fence_fd);
9efabd73 LS	553	if (!submit->in_fence) {
9ad59fea PZ	554	ret = -EINVAL;
	555	goto err_submit_objects;
	556	}
9ad59fea PZ	557	}
9ad59fea PZ	558
a8c21a54 T	559	ret = submit_pin_objects(submit);
a8c21a54 T	560	if (ret)
33a63e68	561	goto err_submit_objects;
a8c21a54 T	562
	563	ret = submit_reloc(submit, stream, args->stream_size / 4,
	564	relocs, args->nr_relocs);
	565	if (ret)
33a63e68	566	goto err_submit_objects;
a8c21a54	567
ef146c00	568	ret = submit_perfmon_validate(submit, args->exec_state, pmrs);
c8e4a7fd	569	if (ret)
33a63e68	570	goto err_submit_objects;
c8e4a7fd	571
2f9225db	572	memcpy(submit->cmdbuf.vaddr, stream, args->stream_size);
a8c21a54	573
e0580254 LS	574	ret = submit_lock_objects(submit, &ticket);
	575	if (ret)
	576	goto err_submit_objects;
	577
	578	ret = submit_fence_sync(submit);
	579	if (ret)
	580	goto err_submit_objects;
	581
e93b6dee	582	ret = etnaviv_sched_push_job(&ctx->sched_entity[args->pipe], submit);
5a642e6b	583	if (ret)
33a63e68	584	goto err_submit_objects;
5a642e6b	585
0236efe9 LS	586	submit_attach_object_fences(submit);
0236efe9 LS	587
78ec187f PZ	588	if (args->flags & ETNA_SUBMIT_FENCE_FD_OUT) {
	589	/*
	590	* This can be improved: ideally we want to allocate the sync
	591	* file before kicking off the GPU job and just attach the
	592	* fence to the sync file here, eliminating the ENOMEM
	593	* possibility at this stage.
	594	*/
10009ea2	595	sync_file = sync_file_create(submit->out_fence);
78ec187f PZ	596	if (!sync_file) {
78ec187f PZ	597	ret = -ENOMEM;
33a63e68	598	goto err_submit_objects;
78ec187f PZ	599	}
	600	fd_install(out_fence_fd, sync_file->file);
	601	}
	602
	603	args->fence_fd = out_fence_fd;
8bc4d885	604	args->fence = submit->out_fence_id;
a8c21a54	605
a8c21a54	606	err_submit_objects:
e0329e6c	607	etnaviv_submit_put(submit);
a8c21a54	608
08301d73 LS	609	err_submit_ww_acquire:
	610	ww_acquire_fini(&ticket);
	611
a8c21a54	612	err_submit_cmds:
78ec187f PZ	613	if (ret && (out_fence_fd >= 0))
78ec187f PZ	614	put_unused_fd(out_fence_fd);
a8c21a54	615	if (stream)
2098105e	616	kvfree(stream);
a8c21a54	617	if (bos)
2098105e	618	kvfree(bos);
a8c21a54	619	if (relocs)
2098105e	620	kvfree(relocs);
c8e4a7fd CG	621	if (pmrs)
c8e4a7fd CG	622	kvfree(pmrs);
a8c21a54 T	623
	624	return ret;
	625	}