kfd_mqd_manager.h | Explore in Territory

/* 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.
 *
 */

#ifndef KFD_MQD_MANAGER_H_
#define KFD_MQD_MANAGER_H_

#include "kfd_priv.h"

#define KFD_MAX_NUM_SE …
#define KFD_MAX_NUM_SH_PER_SE …

/**
 * struct mqd_manager
 *
 * @init_mqd: Allocates the mqd buffer on local gpu memory and initialize it.
 *
 * @load_mqd: Loads the mqd to a concrete hqd slot. Used only for no cp
 * scheduling mode.
 *
 * @update_mqd: Handles a update call for the MQD
 *
 * @destroy_mqd: Destroys the HQD slot and by that preempt the relevant queue.
 * Used only for no cp scheduling.
 *
 * @free_mqd: Releases the mqd buffer from local gpu memory.
 *
 * @is_occupied: Checks if the relevant HQD slot is occupied.
 *
 * @get_wave_state: Retrieves context save state and optionally copies the
 * control stack, if kept in the MQD, to the given userspace address.
 *
 * @mqd_mutex: Mqd manager mutex.
 *
 * @dev: The kfd device structure coupled with this module.
 *
 * MQD stands for Memory Queue Descriptor which represents the current queue
 * state in the memory and initiate the HQD (Hardware Queue Descriptor) state.
 * This structure is actually a base class for the different types of MQDs
 * structures for the variant ASICs that should be supported in the future.
 * This base class is also contains all the MQD specific operations.
 * Another important thing to mention is that each queue has a MQD that keeps
 * his state (or context) after each preemption or reassignment.
 * Basically there are a instances of the mqd manager class per MQD type per
 * ASIC. Currently the kfd driver supports only Kaveri so there are instances
 * per KFD_MQD_TYPE for each device.
 *
 */
extern int pipe_priority_map[];
struct mqd_manager { … };

struct mqd_user_context_save_area_header { … };

struct kfd_mem_obj *allocate_hiq_mqd(struct kfd_node *dev,
				struct queue_properties *q);

struct kfd_mem_obj *allocate_sdma_mqd(struct kfd_node *dev,
					struct queue_properties *q);
void free_mqd_hiq_sdma(struct mqd_manager *mm, void *mqd,
				struct kfd_mem_obj *mqd_mem_obj);

void mqd_symmetrically_map_cu_mask(struct mqd_manager *mm,
		const uint32_t *cu_mask, uint32_t cu_mask_count,
		uint32_t *se_mask, uint32_t inst);

int kfd_hiq_load_mqd_kiq(struct mqd_manager *mm, void *mqd,
		uint32_t pipe_id, uint32_t queue_id,
		struct queue_properties *p, struct mm_struct *mms);

int kfd_destroy_mqd_cp(struct mqd_manager *mm, void *mqd,
		enum kfd_preempt_type type, unsigned int timeout,
		uint32_t pipe_id, uint32_t queue_id);

void kfd_free_mqd_cp(struct mqd_manager *mm, void *mqd,
		struct kfd_mem_obj *mqd_mem_obj);

bool kfd_is_occupied_cp(struct mqd_manager *mm, void *mqd,
		 uint64_t queue_address, uint32_t pipe_id,
		 uint32_t queue_id);

int kfd_load_mqd_sdma(struct mqd_manager *mm, void *mqd,
		uint32_t pipe_id, uint32_t queue_id,
		struct queue_properties *p, struct mm_struct *mms);

int kfd_destroy_mqd_sdma(struct mqd_manager *mm, void *mqd,
		enum kfd_preempt_type type, unsigned int timeout,
		uint32_t pipe_id, uint32_t queue_id);

bool kfd_is_occupied_sdma(struct mqd_manager *mm, void *mqd,
		uint64_t queue_address, uint32_t pipe_id,
		uint32_t queue_id);

void kfd_get_hiq_xcc_mqd(struct kfd_node *dev,
		struct kfd_mem_obj *mqd_mem_obj, uint32_t virtual_xcc_id);

uint64_t kfd_hiq_mqd_stride(struct kfd_node *dev);
uint64_t kfd_mqd_stride(struct mqd_manager *mm,
			struct queue_properties *q);
bool kfd_check_hiq_mqd_doorbell_id(struct kfd_node *node, uint32_t doorbell_id,
				   uint32_t inst);
#endif /* KFD_MQD_MANAGER_H_ */
linux/drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager.h
