path: root/drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.c

/*
 * Copyright 2014 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/slab.h>
#include <linux/list.h>
#include <linux/types.h>
#include <linux/printk.h>
#include <linux/bitops.h>
#include <linux/sched.h>
#include "kfd_priv.h"
#include "kfd_device_queue_manager.h"
#include "kfd_mqd_manager.h"
#include "cik_regs.h"
#include "kfd_kernel_queue.h"

/* Size of the per-pipe EOP queue */
#define CIK_HPD_EOP_BYTES_LOG2 11
#define CIK_HPD_EOP_BYTES (1U << CIK_HPD_EOP_BYTES_LOG2)

static int set_pasid_vmid_mapping(struct device_queue_manager *dqm,
					unsigned int pasid, unsigned int vmid);

static int create_compute_queue_nocpsch(struct device_queue_manager *dqm,
					struct queue *q,
					struct qcm_process_device *qpd);

static int execute_queues_cpsch(struct device_queue_manager *dqm,
				enum kfd_unmap_queues_filter filter,
				uint32_t filter_param);
static int unmap_queues_cpsch(struct device_queue_manager *dqm,
				enum kfd_unmap_queues_filter filter,
				uint32_t filter_param);

static int map_queues_cpsch(struct device_queue_manager *dqm);

static int create_sdma_queue_nocpsch(struct device_queue_manager *dqm,
					struct queue *q,
					struct qcm_process_device *qpd);

static void deallocate_sdma_queue(struct device_queue_manager *dqm,
				unsigned int sdma_queue_id);

static inline
enum KFD_MQD_TYPE get_mqd_type_from_queue_type(enum kfd_queue_type type)
{
	if (type == KFD_QUEUE_TYPE_SDMA)
		return KFD_MQD_TYPE_SDMA;
	return KFD_MQD_TYPE_CP;
}

static bool is_pipe_enabled(struct device_queue_manager *dqm, int mec, int pipe)
{
	int i;
	int pipe_offset = mec * dqm->dev->shared_resources.num_pipe_per_mec
		+ pipe * dqm->dev->shared_resources.num_queue_per_pipe;

	/* queue is available for KFD usage if bit is 1 */
	for (i = 0; i <  dqm->dev->shared_resources.num_queue_per_pipe; ++i)
		if (test_bit(pipe_offset + i,
			      dqm->dev->shared_resources.queue_bitmap))
			return true;
	return false;
}

unsigned int get_queues_num(struct device_queue_manager *dqm)
{
	return bitmap_weight(dqm->dev->shared_resources.queue_bitmap,
				KGD_MAX_QUEUES);
}

unsigned int get_queues_per_pipe(struct device_queue_manager *dqm)
{
	return dqm->dev->shared_resources.num_queue_per_pipe;
}

unsigned int g