linux/drivers/gpu/drm/xe/xe_hw_engine_group.c

// SPDX-License-Identifier: MIT
/*
 * Copyright © 2024 Intel Corporation
 */

#include <drm/drm_managed.h>

#include "xe_assert.h"
#include "xe_device.h"
#include "xe_exec_queue.h"
#include "xe_gt.h"
#include "xe_hw_engine_group.h"
#include "xe_vm.h"

static void
hw_engine_group_free(struct drm_device *drm, void *arg)
{ … }

static void
hw_engine_group_resume_lr_jobs_func(struct work_struct *w)
{ … }

static struct xe_hw_engine_group *
hw_engine_group_alloc(struct xe_device *xe)
{ … }

/**
 * xe_hw_engine_setup_groups() - Setup the hw engine groups for the gt
 * @gt: The gt for which groups are setup
 *
 * Return: 0 on success, negative error code on error.
 */
int xe_hw_engine_setup_groups(struct xe_gt *gt)
{ … }

/**
 * xe_hw_engine_group_add_exec_queue() - Add an exec queue to a hw engine group
 * @group: The hw engine group
 * @q: The exec_queue
 *
 * Return: 0 on success,
 *	    -EINTR if the lock could not be acquired
 */
int xe_hw_engine_group_add_exec_queue(struct xe_hw_engine_group *group, struct xe_exec_queue *q)
{ … }

/**
 * xe_hw_engine_group_del_exec_queue() - Delete an exec queue from a hw engine group
 * @group: The hw engine group
 * @q: The exec_queue
 */
void xe_hw_engine_group_del_exec_queue(struct xe_hw_engine_group *group, struct xe_exec_queue *q)
{ … }

/**
 * xe_hw_engine_group_resume_faulting_lr_jobs() - Asynchronously resume the hw engine group's
 * faulting LR jobs
 * @group: The hw engine group
 */
void xe_hw_engine_group_resume_faulting_lr_jobs(struct xe_hw_engine_group *group)
{ … }

/**
 * xe_hw_engine_group_suspend_faulting_lr_jobs() - Suspend the faulting LR jobs of this group
 * @group: The hw engine group
 *
 * Return: 0 on success, negative error code on error.
 */
static int xe_hw_engine_group_suspend_faulting_lr_jobs(struct xe_hw_engine_group *group)
{ … }

/**
 * xe_hw_engine_group_wait_for_dma_fence_jobs() - Wait for dma fence jobs to complete
 * @group: The hw engine group
 *
 * This function is not meant to be called directly from a user IOCTL as dma_fence_wait()
 * is not interruptible.
 *
 * Return: 0 on success,
 *	   -ETIME if waiting for one job failed
 */
static int xe_hw_engine_group_wait_for_dma_fence_jobs(struct xe_hw_engine_group *group)
{ … }

static int switch_mode(struct xe_hw_engine_group *group)
{ … }

/**
 * xe_hw_engine_group_get_mode() - Get the group to execute in the new mode
 * @group: The hw engine group
 * @new_mode: The new execution mode
 * @previous_mode: Pointer to the previous mode provided for use by caller
 *
 * Return: 0 if successful, -EINTR if locking failed.
 */
int xe_hw_engine_group_get_mode(struct xe_hw_engine_group *group,
				enum xe_hw_engine_group_execution_mode new_mode,
				enum xe_hw_engine_group_execution_mode *previous_mode)
__acquires(&group->mode_sem)
{ … }

/**
 * xe_hw_engine_group_put() - Put the group
 * @group: The hw engine group
 */
void xe_hw_engine_group_put(struct xe_hw_engine_group *group)
__releases(&group->mode_sem)
{ … }

/**
 * xe_hw_engine_group_find_exec_mode() - Find the execution mode for this exec queue
 * @q: The exec_queue
 */
enum xe_hw_engine_group_execution_mode
xe_hw_engine_group_find_exec_mode(struct xe_exec_queue *q)
{ … }