[linux-block.git] / drivers / gpu / drm / xe / xe_exec.c

// SPDX-License-Identifier: MIT
/*
 * Copyright © 2022 Intel Corporation
 */

#include "xe_exec.h"

#include <drm/drm_device.h>
#include <drm/drm_exec.h>
#include <drm/drm_file.h>
#include <drm/xe_drm.h>
#include <linux/delay.h>

#include "xe_bo.h"
#include "xe_device.h"
#include "xe_exec_queue.h"
#include "xe_macros.h"
#include "xe_ring_ops_types.h"
#include "xe_sched_job.h"
#include "xe_sync.h"
#include "xe_vm.h"

/**
 * DOC: Execbuf (User GPU command submission)
 *
 * Execs have historically been rather complicated in DRM drivers (at least in
 * the i915) because a few things:
 *
 * - Passing in a list BO which are read / written to creating implicit syncs
 * - Binding at exec time
 * - Flow controlling the ring at exec time
 *
 * In XE we avoid all of this complication by not allowing a BO list to be
 * passed into an exec, using the dma-buf implicit sync uAPI, have binds as
 * seperate operations, and using the DRM scheduler to flow control the ring.
 * Let's deep dive on each of these.
 *
 * We can get away from a BO list by forcing the user to use in / out fences on
 * every exec rather than the kernel tracking dependencies of BO (e.g. if the
 * user knows an exec writes to a BO and reads from the BO in the next exec, it
 * is the user's responsibility to pass in / out fence between the two execs).
 *
 * Implicit dependencies for external BOs are handled by using the dma-buf
 * implicit dependency uAPI (TODO: add link). To make this works each exec must
 * install the job's fence into the DMA_RESV_USAGE_WRITE slot of every external
 * BO mapped in the VM.
 *
 * We do not allow a user to trigger a bind at exec time rather we have a VM
 * bind IOCTL which uses the same in / out fence interface as exec. In that
 * sense, a VM bind is basically the same operation as an exec from the user
 * perspective. e.g. If an exec depends on a VM bind use the in / out fence
 * interface (struct drm_xe_sync) to synchronize like syncing between two
 * dependent execs.
 *
 * Although a user cannot trigger a bind, we still have to rebind userptrs in
 * the VM that have been invalidated since the last exec, likewise we also have
 * to rebind BOs that have been evicted by the kernel. We schedule these rebinds
 * behind any pending kernel operations on any external BOs in VM or any BOs
 * private to the VM. This is accomplished by the rebinds waiting on BOs
 * DMA_RESV_USAGE_KERNEL slot (kernel ops) and kernel ops waiting on all BOs
 * slots (inflight execs are in the DMA_RESV_USAGE_BOOKING for private BOs and
 * in DMA_RESV_USAGE_WRITE for external BOs).
 *
 * Rebinds / dma-resv usage applies to non-compute mode VMs only as for compute
 * mode VMs we use preempt fences and a rebind worker (TODO: add link).
 *
 * There is no need to flow control the ring in the exec as we write the ring at
 * submission time and set the DRM scheduler max job limit SIZE_OF_RING /
 * MAX_JOB_SIZE. The DRM scheduler will then hold all jobs until space in the
 * ring is available.
 *
 * All of this results in a rather simple exec implementation.
 *
 * Flow
 * ~~~~
 *
 * .. code-block::
 *
 *	Parse input arguments
 *	Wait for any async VM bind passed as in-fences to start
 *	<----------------------------------------------------------------------|
 *	Lock global VM lock in read mode                                       |
 *	Pin userptrs (also finds userptr invalidated since last exec)          |
 *	Lock exec (VM dma-resv lock, external BOs dma-resv locks)              |
 *	Validate BOs that have been evicted                                    |
 *	Create job                                                             |
 *	Rebind invalidated userptrs + evicted BOs (non-compute-mode)           |
 *	Add rebind fence dependency to job                                     |
 *	Add job VM dma-resv bookkeeping slot (non-compute mode)                |
 *	Add job to external BOs dma-resv write slots (non-compute mode)        |
 *	Check if any userptrs invalidated since pin ------ Drop locks ---------|
 *	Install in / out fences for job
 *	Submit job
 *	Unlock all
 */

static int xe_exec_fn(struct drm_gpuvm_exec *vm_exec)
{
	return drm_gpuvm_validate(vm_exec->vm, &vm_exec->exec);
}

int xe_exec_ioctl(struct drm_device *dev, void *data, struct drm_file *file)
{
	struct xe_device *xe = to_xe_device(dev);
	struct xe_file *xef = to_xe_file(file);
	struct drm_xe_exec *args = data;
	struct drm_xe_sync __user *syncs_user = u64_to_user_ptr(args->syncs);
	u64 __user *addresses_user = u64_to_user_ptr(args->address);
	struct xe_exec_queue *q;
	struct xe_sync_entry *syncs = NULL;
	u64 addresses[XE_HW_ENGINE_MAX_INSTANCE];
	struct drm_gpuvm_exec vm_exec = {.extra.fn = xe_exec_fn};
	struct drm_exec *exec = &vm_exec.exec;
	u32 i, num_syncs = 0, num_ufence = 0;
	struct xe_sched_job *job;
	struct dma_fence *rebind_fence;
	struct xe_vm *vm;
	bool write_locked, skip_retry = false;
	ktime_t end = 0;
	int err = 0;

	if (XE_IOCTL_DBG(xe, args->extensions) ||
	    XE_IOCTL_DBG(xe, args->pad[0] || args->pad[1] || args->pad[2]) ||
	    XE_IOCTL_DBG(xe, args->reserved[0] || args->reserved[1]))
		return -EINVAL;

	q = xe_exec_queue_lookup(xef, args->exec_queue_id);
	if (XE_IOCTL_DBG(xe, !q))
		return -ENOENT;

	if (XE_IOCTL_DBG(xe, q->flags & EXEC_QUEUE_FLAG_VM))
		return -EINVAL;

	if (XE_IOCTL_DBG(xe, args->num_batch_buffer &&
			 q->width != args->num_batch_buffer))
		return -EINVAL;

	if (XE_IOCTL_DBG(xe, q->flags & EXEC_QUEUE_FLAG_BANNED)) {
		err = -ECANCELED;
		goto err_exec_queue;
	}

	if (args->num_syncs) {
		syncs = kcalloc(args->num_syncs, sizeof(*syncs), GFP_KERNEL);
		if (!syncs) {
			err = -ENOMEM;
			goto err_exec_queue;
		}
	}

	vm = q->vm;

	for (i = 0; i < args->num_syncs; i++) {
		err = xe_sync_entry_parse(xe, xef, &syncs[num_syncs++],
					  &syncs_user[i], SYNC_PARSE_FLAG_EXEC |
					  (xe_vm_in_lr_mode(vm) ?
					   SYNC_PARSE_FLAG_LR_MODE : 0));
		if (err)
			goto err_syncs;

		if (xe_sync_is_ufence(&syncs[i]))
			num_ufence++;
	}

	if (XE_IOCTL_DBG(xe, num_ufence > 1)) {
		err = -EINVAL;
		goto err_syncs;
	}

	if (xe_exec_queue_is_parallel(q)) {
		err = __copy_from_user(addresses, addresses_user, sizeof(u64) *
				       q->width);
		if (err) {
			err = -EFAULT;
			goto err_syncs;
		}
	}

retry:
	if (!xe_vm_in_lr_mode(vm) && xe_vm_userptr_check_repin(vm)) {
		err = down_write_killable(&vm->lock);
		write_locked = true;
	} else {
		/* We don't allow execs while the VM is in error state */
		err = down_read_interruptible(&vm->lock);
		write_locked = false;
	}
	if (err)
		goto err_syncs;

	if (write_locked) {
		err = xe_vm_userptr_pin(vm);
		downgrade_write(&vm->lock);
		write_locked = false;
		if (err)
			goto err_unlock_list;
	}

	vm_exec.vm = &vm->gpuvm;
	vm_exec.num_fences = 1 + vm->xe->info.tile_count;
	vm_exec.flags = DRM_EXEC_INTERRUPTIBLE_WAIT;
	if (xe_vm_in_lr_mode(vm)) {
		drm_exec_init(exec, vm_exec.flags, 0);
	} else {
		err = drm_gpuvm_exec_lock(&vm_exec);
		if (err) {
			if (xe_vm_validate_should_retry(exec, err, &end))
				err = -EAGAIN;
			goto err_unlock_list;
		}
	}

	if (xe_vm_is_closed_or_banned(q->vm)) {
		drm_warn(&xe->drm, "Trying to schedule after vm is closed or banned\n");
		err = -ECANCELED;
		goto err_exec;
	}

	if (!args->num_batch_buffer) {
		if (!xe_vm_in_lr_mode(vm)) {
			struct dma_fence *fence;

			fence = xe_sync_in_fence_get(syncs, num_syncs, q, vm);
			if (IS_ERR(fence)) {
				err = PTR_ERR(fence);
				goto err_exec;
			}
			for (i = 0; i < num_syncs; i++)
				xe_sync_entry_signal(&syncs[i], NULL, fence);
			xe_exec_queue_last_fence_set(q, vm, fence);
			dma_fence_put(fence);
		}

		goto err_exec;
	}

	if (xe_exec_queue_is_lr(q) && xe_exec_queue_ring_full(q)) {
		err = -EWOULDBLOCK;	/* Aliased to -EAGAIN */
		skip_retry = true;
		goto err_exec;
	}

	job = xe_sched_job_create(q, xe_exec_queue_is_parallel(q) ?
				  addresses : &args->address);
	if (IS_ERR(job)) {
		err = PTR_ERR(job);
		goto err_exec;
	}

	/*
	 * Rebind any invalidated userptr or evicted BOs in the VM, non-compute
	 * VM mode only.
	 */
	rebind_fence = xe_vm_rebind(vm, false);
	if (IS_ERR(rebind_fence)) {
		err = PTR_ERR(rebind_fence);
		goto err_put_job;
	}

	/*
	 * We store the rebind_fence in the VM so subsequent execs don't get
	 * scheduled before the rebinds of userptrs / evicted BOs is complete.
	 */
	if (rebind_fence) {
		dma_fence_put(vm->rebind_fence);
		vm->rebind_fence = rebind_fence;
	}
	if (vm->rebind_fence) {
		if (test_bit(DMA_FENCE_FLAG_SIGNALED_BIT,
			     &vm->rebind_fence->flags)) {
			dma_fence_put(vm->rebind_fence);
			vm->rebind_fence = NULL;
		} else {
			dma_fence_get(vm->rebind_fence);
			err = drm_sched_job_add_dependency(&job->drm,
							   vm->rebind_fence);
			if (err)
				goto err_put_job;
		}
	}

	/* Wait behind munmap style rebinds */
	if (!xe_vm_in_lr_mode(vm)) {
		err = drm_sched_job_add_resv_dependencies(&job->drm,
							  xe_vm_resv(vm),
							  DMA_RESV_USAGE_KERNEL);
		if (err)
			goto err_put_job;
	}

	for (i = 0; i < num_syncs && !err; i++)
		err = xe_sync_entry_add_deps(&syncs[i], job);
	if (err)
		goto err_put_job;

	if (!xe_vm_in_lr_mode(vm)) {
		err = xe_sched_job_last_fence_add_dep(job, vm);
		if (err)
			goto err_put_job;

		err = down_read_interruptible(&vm->userptr.notifier_lock);
		if (err)
			goto err_put_job;

		err = __xe_vm_userptr_needs_repin(vm);
		if (err)
			goto err_repin;
	}

	/*
	 * Point of no return, if we error after this point just set an error on
	 * the job and let the DRM scheduler / backend clean up the job.
	 */
	xe_sched_job_arm(job);
	if (!xe_vm_in_lr_mode(vm))
		drm_gpuvm_resv_add_fence(&vm->gpuvm, exec, &job->drm.s_fence->finished,
					 DMA_RESV_USAGE_BOOKKEEP, DMA_RESV_USAGE_WRITE);

	for (i = 0; i < num_syncs; i++)
		xe_sync_entry_signal(&syncs[i], job,
				     &job->drm.s_fence->finished);

	if (xe_exec_queue_is_lr(q))
		q->ring_ops->emit_job(job);
	if (!xe_vm_in_lr_mode(vm))
		xe_exec_queue_last_fence_set(q, vm, &job->drm.s_fence->finished);
	xe_sched_job_push(job);
	xe_vm_reactivate_rebind(vm);

	if (!err && !xe_vm_in_lr_mode(vm)) {
		spin_lock(&xe->ttm.lru_lock);
		ttm_lru_bulk_move_tail(&vm->lru_bulk_move);
		spin_unlock(&xe->ttm.lru_lock);
	}

err_repin:
	if (!xe_vm_in_lr_mode(vm))
		up_read(&vm->userptr.notifier_lock);
err_put_job:
	if (err)
		xe_sched_job_put(job);
err_exec:
	drm_exec_fini(exec);
err_unlock_list:
	if (write_locked)
		up_write(&vm->lock);
	else
		up_read(&vm->lock);
	if (err == -EAGAIN && !skip_retry)
		goto retry;
err_syncs:
	for (i = 0; i < num_syncs; i++)
		xe_sync_entry_cleanup(&syncs[i]);
	kfree(syncs);
err_exec_queue:
	xe_exec_queue_put(q);

	return err;
}
Commit	Line	Data
dd08ebf6 MB	1	// SPDX-License-Identifier: MIT
	2	/*
	3	* Copyright © 2022 Intel Corporation
	4	*/
	5
ea9f879d LDM	6	#include "xe_exec.h"
ea9f879d LDM	7
dd08ebf6	8	#include <drm/drm_device.h>
d490ecf5	9	#include <drm/drm_exec.h>
dd08ebf6 MB	10	#include <drm/drm_file.h>
dd08ebf6 MB	11	#include <drm/xe_drm.h>
34f89ac8	12	#include <linux/delay.h>
dd08ebf6 MB	13
	14	#include "xe_bo.h"
	15	#include "xe_device.h"
c22a4ed0	16	#include "xe_exec_queue.h"
dd08ebf6	17	#include "xe_macros.h"
8ae8a2e8	18	#include "xe_ring_ops_types.h"
dd08ebf6 MB	19	#include "xe_sched_job.h"
	20	#include "xe_sync.h"
	21	#include "xe_vm.h"
	22
	23	/**
	24	* DOC: Execbuf (User GPU command submission)
	25	*
	26	* Execs have historically been rather complicated in DRM drivers (at least in
	27	* the i915) because a few things:
	28	*
	29	* - Passing in a list BO which are read / written to creating implicit syncs
	30	* - Binding at exec time
	31	* - Flow controlling the ring at exec time
	32	*
	33	* In XE we avoid all of this complication by not allowing a BO list to be
	34	* passed into an exec, using the dma-buf implicit sync uAPI, have binds as
	35	* seperate operations, and using the DRM scheduler to flow control the ring.
	36	* Let's deep dive on each of these.
	37	*
	38	* We can get away from a BO list by forcing the user to use in / out fences on
	39	* every exec rather than the kernel tracking dependencies of BO (e.g. if the
	40	* user knows an exec writes to a BO and reads from the BO in the next exec, it
	41	* is the user's responsibility to pass in / out fence between the two execs).
	42	*
	43	* Implicit dependencies for external BOs are handled by using the dma-buf
	44	* implicit dependency uAPI (TODO: add link). To make this works each exec must
	45	* install the job's fence into the DMA_RESV_USAGE_WRITE slot of every external
	46	* BO mapped in the VM.
	47	*
	48	* We do not allow a user to trigger a bind at exec time rather we have a VM
	49	* bind IOCTL which uses the same in / out fence interface as exec. In that
	50	* sense, a VM bind is basically the same operation as an exec from the user
	51	* perspective. e.g. If an exec depends on a VM bind use the in / out fence
	52	* interface (struct drm_xe_sync) to synchronize like syncing between two
	53	* dependent execs.
	54	*
	55	* Although a user cannot trigger a bind, we still have to rebind userptrs in
	56	* the VM that have been invalidated since the last exec, likewise we also have
	57	* to rebind BOs that have been evicted by the kernel. We schedule these rebinds
	58	* behind any pending kernel operations on any external BOs in VM or any BOs
	59	* private to the VM. This is accomplished by the rebinds waiting on BOs
	60	* DMA_RESV_USAGE_KERNEL slot (kernel ops) and kernel ops waiting on all BOs
	61	* slots (inflight execs are in the DMA_RESV_USAGE_BOOKING for private BOs and
	62	* in DMA_RESV_USAGE_WRITE for external BOs).
	63	*
	64	* Rebinds / dma-resv usage applies to non-compute mode VMs only as for compute
	65	* mode VMs we use preempt fences and a rebind worker (TODO: add link).
	66	*
	67	* There is no need to flow control the ring in the exec as we write the ring at
	68	* submission time and set the DRM scheduler max job limit SIZE_OF_RING /
	69	* MAX_JOB_SIZE. The DRM scheduler will then hold all jobs until space in the
	70	* ring is available.
	71	*
	72	* All of this results in a rather simple exec implementation.
	73	*
	74	* Flow
	75	* ~~~~
	76	*
	77	* .. code-block::
	78	*
	79	* Parse input arguments
	80	* Wait for any async VM bind passed as in-fences to start
	81	* <----------------------------------------------------------------------\|
	82	* Lock global VM lock in read mode \|
83	* Pin userptrs (also finds userptr invalidated since last exec) \|
84	* Lock exec (VM dma-resv lock, external BOs dma-resv locks) \|
85	* Validate BOs that have been evicted \|
86	* Create job \|
87	* Rebind invalidated userptrs + evicted BOs (non-compute-mode) \|
88	* Add rebind fence dependency to job \|
89	* Add job VM dma-resv bookkeeping slot (non-compute mode) \|
90	* Add job to external BOs dma-resv write slots (non-compute mode) \|
91	* Check if any userptrs invalidated since pin ------ Drop locks ---------\|
92	* Install in / out fences for job
93	* Submit job
94	* Unlock all
95	*/
96
24f947d5	97	static int xe_exec_fn(struct drm_gpuvm_exec *vm_exec)
dd08ebf6	98	{
24f947d5	99	return drm_gpuvm_validate(vm_exec->vm, &vm_exec->exec);
dd08ebf6 MB	100	}
dd08ebf6 MB	101
dd08ebf6 MB	102	int xe_exec_ioctl(struct drm_device dev, void data, struct drm_file *file)
	103	{
	104	struct xe_device *xe = to_xe_device(dev);
	105	struct xe_file *xef = to_xe_file(file);
	106	struct drm_xe_exec *args = data;
	107	struct drm_xe_sync __user *syncs_user = u64_to_user_ptr(args->syncs);
	108	u64 __user *addresses_user = u64_to_user_ptr(args->address);
9b9529ce	109	struct xe_exec_queue *q;
dd08ebf6 MB	110	struct xe_sync_entry *syncs = NULL;
dd08ebf6 MB	111	u64 addresses[XE_HW_ENGINE_MAX_INSTANCE];
24f947d5 TH	112	struct drm_gpuvm_exec vm_exec = {.extra.fn = xe_exec_fn};
24f947d5 TH	113	struct drm_exec *exec = &vm_exec.exec;
efeff7b3	114	u32 i, num_syncs = 0, num_ufence = 0;
dd08ebf6 MB	115	struct xe_sched_job *job;
	116	struct dma_fence *rebind_fence;
	117	struct xe_vm *vm;
56c253da	118	bool write_locked, skip_retry = false;
d490ecf5	119	ktime_t end = 0;
dd08ebf6 MB	120	int err = 0;
dd08ebf6 MB	121
b8c1ba83 FD	122	if (XE_IOCTL_DBG(xe, args->extensions) \|\|
	123	XE_IOCTL_DBG(xe, args->pad[0] \|\| args->pad[1] \|\| args->pad[2]) \|\|
	124	XE_IOCTL_DBG(xe, args->reserved[0] \|\| args->reserved[1]))
dd08ebf6 MB	125	return -EINVAL;
dd08ebf6 MB	126
9b9529ce FD	127	q = xe_exec_queue_lookup(xef, args->exec_queue_id);
9b9529ce FD	128	if (XE_IOCTL_DBG(xe, !q))
dd08ebf6 MB	129	return -ENOENT;
dd08ebf6 MB	130
9b9529ce	131	if (XE_IOCTL_DBG(xe, q->flags & EXEC_QUEUE_FLAG_VM))
dd08ebf6 MB	132	return -EINVAL;
dd08ebf6 MB	133
eb9702ad MB	134	if (XE_IOCTL_DBG(xe, args->num_batch_buffer &&
eb9702ad MB	135	q->width != args->num_batch_buffer))
dd08ebf6 MB	136	return -EINVAL;
dd08ebf6 MB	137
9b9529ce	138	if (XE_IOCTL_DBG(xe, q->flags & EXEC_QUEUE_FLAG_BANNED)) {
dd08ebf6	139	err = -ECANCELED;
9b9529ce	140	goto err_exec_queue;
dd08ebf6 MB	141	}
	142
	143	if (args->num_syncs) {
	144	syncs = kcalloc(args->num_syncs, sizeof(*syncs), GFP_KERNEL);
	145	if (!syncs) {
	146	err = -ENOMEM;
9b9529ce	147	goto err_exec_queue;
dd08ebf6 MB	148	}
	149	}
	150
9b9529ce	151	vm = q->vm;
dd08ebf6 MB	152
	153	for (i = 0; i < args->num_syncs; i++) {
	154	err = xe_sync_entry_parse(xe, xef, &syncs[num_syncs++],
53bf60f6 MB	155	&syncs_user[i], SYNC_PARSE_FLAG_EXEC \|
	156	(xe_vm_in_lr_mode(vm) ?
	157	SYNC_PARSE_FLAG_LR_MODE : 0));
dd08ebf6 MB	158	if (err)
dd08ebf6 MB	159	goto err_syncs;
efeff7b3 MB	160
	161	if (xe_sync_is_ufence(&syncs[i]))
	162	num_ufence++;
	163	}
	164
	165	if (XE_IOCTL_DBG(xe, num_ufence > 1)) {
	166	err = -EINVAL;
	167	goto err_syncs;
dd08ebf6 MB	168	}
dd08ebf6 MB	169
9b9529ce	170	if (xe_exec_queue_is_parallel(q)) {
dd08ebf6	171	err = __copy_from_user(addresses, addresses_user, sizeof(u64) *
9b9529ce	172	q->width);
dd08ebf6 MB	173	if (err) {
	174	err = -EFAULT;
	175	goto err_syncs;
	176	}
	177	}
	178
dd08ebf6	179	retry:
fdb6a053	180	if (!xe_vm_in_lr_mode(vm) && xe_vm_userptr_check_repin(vm)) {
dd08ebf6 MB	181	err = down_write_killable(&vm->lock);
	182	write_locked = true;
	183	} else {
	184	/* We don't allow execs while the VM is in error state */
	185	err = down_read_interruptible(&vm->lock);
	186	write_locked = false;
	187	}
	188	if (err)
	189	goto err_syncs;
	190
dd08ebf6 MB	191	if (write_locked) {
	192	err = xe_vm_userptr_pin(vm);
	193	downgrade_write(&vm->lock);
	194	write_locked = false;
	195	if (err)
	196	goto err_unlock_list;
	197	}
	198
24f947d5 TH	199	vm_exec.vm = &vm->gpuvm;
	200	vm_exec.num_fences = 1 + vm->xe->info.tile_count;
	201	vm_exec.flags = DRM_EXEC_INTERRUPTIBLE_WAIT;
	202	if (xe_vm_in_lr_mode(vm)) {
d2197029	203	drm_exec_init(exec, vm_exec.flags, 0);
24f947d5 TH	204	} else {
	205	err = drm_gpuvm_exec_lock(&vm_exec);
	206	if (err) {
	207	if (xe_vm_validate_should_retry(exec, err, &end))
	208	err = -EAGAIN;
d490ecf5 TH	209	goto err_unlock_list;
d490ecf5 TH	210	}
d490ecf5	211	}
dd08ebf6	212
9b9529ce	213	if (xe_vm_is_closed_or_banned(q->vm)) {
9d858b69 MB	214	drm_warn(&xe->drm, "Trying to schedule after vm is closed or banned\n");
9d858b69 MB	215	err = -ECANCELED;
d490ecf5	216	goto err_exec;
dd08ebf6 MB	217	}
dd08ebf6 MB	218
eb9702ad MB	219	if (!args->num_batch_buffer) {
	220	if (!xe_vm_in_lr_mode(vm)) {
	221	struct dma_fence *fence;
	222
	223	fence = xe_sync_in_fence_get(syncs, num_syncs, q, vm);
	224	if (IS_ERR(fence)) {
	225	err = PTR_ERR(fence);
	226	goto err_exec;
	227	}
	228	for (i = 0; i < num_syncs; i++)
	229	xe_sync_entry_signal(&syncs[i], NULL, fence);
	230	xe_exec_queue_last_fence_set(q, vm, fence);
	231	dma_fence_put(fence);
	232	}
	233
	234	goto err_exec;
	235	}
	236
9b9529ce	237	if (xe_exec_queue_is_lr(q) && xe_exec_queue_ring_full(q)) {
56c253da MB	238	err = -EWOULDBLOCK; /* Aliased to -EAGAIN */
56c253da MB	239	skip_retry = true;
d490ecf5	240	goto err_exec;
8ae8a2e8 MB	241	}
8ae8a2e8 MB	242
9b9529ce	243	job = xe_sched_job_create(q, xe_exec_queue_is_parallel(q) ?
dd08ebf6 MB	244	addresses : &args->address);
	245	if (IS_ERR(job)) {
	246	err = PTR_ERR(job);
d490ecf5	247	goto err_exec;
dd08ebf6 MB	248	}
	249
	250	/*
	251	* Rebind any invalidated userptr or evicted BOs in the VM, non-compute
	252	* VM mode only.
	253	*/
	254	rebind_fence = xe_vm_rebind(vm, false);
	255	if (IS_ERR(rebind_fence)) {
	256	err = PTR_ERR(rebind_fence);
	257	goto err_put_job;
	258	}
	259
	260	/*
	261	* We store the rebind_fence in the VM so subsequent execs don't get
	262	* scheduled before the rebinds of userptrs / evicted BOs is complete.
	263	*/
	264	if (rebind_fence) {
	265	dma_fence_put(vm->rebind_fence);
	266	vm->rebind_fence = rebind_fence;
	267	}
	268	if (vm->rebind_fence) {
	269	if (test_bit(DMA_FENCE_FLAG_SIGNALED_BIT,
	270	&vm->rebind_fence->flags)) {
	271	dma_fence_put(vm->rebind_fence);
	272	vm->rebind_fence = NULL;
	273	} else {
	274	dma_fence_get(vm->rebind_fence);
	275	err = drm_sched_job_add_dependency(&job->drm,
	276	vm->rebind_fence);
	277	if (err)
	278	goto err_put_job;
	279	}
	280	}
	281
	282	/* Wait behind munmap style rebinds */
fdb6a053	283	if (!xe_vm_in_lr_mode(vm)) {
dd08ebf6	284	err = drm_sched_job_add_resv_dependencies(&job->drm,
b06d47be	285	xe_vm_resv(vm),
dd08ebf6 MB	286	DMA_RESV_USAGE_KERNEL);
	287	if (err)
	288	goto err_put_job;
	289	}
	290
	291	for (i = 0; i < num_syncs && !err; i++)
	292	err = xe_sync_entry_add_deps(&syncs[i], job);
	293	if (err)
	294	goto err_put_job;
	295
fdb6a053	296	if (!xe_vm_in_lr_mode(vm)) {
eb9702ad MB	297	err = xe_sched_job_last_fence_add_dep(job, vm);
	298	if (err)
	299	goto err_put_job;
	300
dd08ebf6 MB	301	err = down_read_interruptible(&vm->userptr.notifier_lock);
	302	if (err)
	303	goto err_put_job;
	304
	305	err = __xe_vm_userptr_needs_repin(vm);
	306	if (err)
	307	goto err_repin;
	308	}
	309
	310	/*
	311	* Point of no return, if we error after this point just set an error on
	312	* the job and let the DRM scheduler / backend clean up the job.
	313	*/
	314	xe_sched_job_arm(job);
24f947d5 TH	315	if (!xe_vm_in_lr_mode(vm))
	316	drm_gpuvm_resv_add_fence(&vm->gpuvm, exec, &job->drm.s_fence->finished,
	317	DMA_RESV_USAGE_BOOKKEEP, DMA_RESV_USAGE_WRITE);
dd08ebf6 MB	318
	319	for (i = 0; i < num_syncs; i++)
	320	xe_sync_entry_signal(&syncs[i], job,
	321	&job->drm.s_fence->finished);
	322
9b9529ce FD	323	if (xe_exec_queue_is_lr(q))
9b9529ce FD	324	q->ring_ops->emit_job(job);
eb9702ad MB	325	if (!xe_vm_in_lr_mode(vm))
eb9702ad MB	326	xe_exec_queue_last_fence_set(q, vm, &job->drm.s_fence->finished);
dd08ebf6	327	xe_sched_job_push(job);
8e41443e	328	xe_vm_reactivate_rebind(vm);
dd08ebf6	329
fdb6a053	330	if (!err && !xe_vm_in_lr_mode(vm)) {
7ba4c5f0 MB	331	spin_lock(&xe->ttm.lru_lock);
	332	ttm_lru_bulk_move_tail(&vm->lru_bulk_move);
	333	spin_unlock(&xe->ttm.lru_lock);
	334	}
	335
dd08ebf6	336	err_repin:
fdb6a053	337	if (!xe_vm_in_lr_mode(vm))
dd08ebf6 MB	338	up_read(&vm->userptr.notifier_lock);
	339	err_put_job:
	340	if (err)
	341	xe_sched_job_put(job);
d490ecf5	342	err_exec:
24f947d5	343	drm_exec_fini(exec);
dd08ebf6 MB	344	err_unlock_list:
	345	if (write_locked)
	346	up_write(&vm->lock);
	347	else
	348	up_read(&vm->lock);
56c253da	349	if (err == -EAGAIN && !skip_retry)
dd08ebf6 MB	350	goto retry;
	351	err_syncs:
	352	for (i = 0; i < num_syncs; i++)
	353	xe_sync_entry_cleanup(&syncs[i]);
	354	kfree(syncs);
9b9529ce FD	355	err_exec_queue:
9b9529ce FD	356	xe_exec_queue_put(q);
dd08ebf6 MB	357
	358	return err;
	359	}