linux/drivers/gpu/drm/amd/amdkfd/kfd_kernel_queue.c

// SPDX-License-Identifier: GPL-2.0 OR MIT
/*
 * Copyright 2014-2022 Advanced Micro Devices, Inc.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 * OTHER DEALINGS IN THE SOFTWARE.
 *
 */

#include <linux/types.h>
#include <linux/mutex.h>
#include <linux/slab.h>
#include <linux/printk.h>
#include <linux/sched.h>
#include "kfd_kernel_queue.h"
#include "kfd_priv.h"
#include "kfd_device_queue_manager.h"
#include "kfd_pm4_headers.h"
#include "kfd_pm4_opcodes.h"
#include "amdgpu_reset.h"

#define PM4_COUNT_ZERO …

/* Initialize a kernel queue, including allocations of GART memory
 * needed for the queue.
 */
static bool kq_initialize(struct kernel_queue *kq, struct kfd_node *dev,
		enum kfd_queue_type type, unsigned int queue_size)
{ … }

/* Uninitialize a kernel queue and free all its memory usages. */
static void kq_uninitialize(struct kernel_queue *kq)
{ … }

int kq_acquire_packet_buffer(struct kernel_queue *kq,
		size_t packet_size_in_dwords, unsigned int **buffer_ptr)
{ … }

int kq_submit_packet(struct kernel_queue *kq)
{ … }

void kq_rollback_packet(struct kernel_queue *kq)
{ … }

struct kernel_queue *kernel_queue_init(struct kfd_node *dev,
					enum kfd_queue_type type)
{ … }

void kernel_queue_uninit(struct kernel_queue *kq)
{ … }

/* FIXME: Can this test be removed? */
static __attribute__((unused)) void test_kq(struct kfd_node *dev)
{ … }