[linux-2.6-block.git] / drivers / gpu / drm / amd / amdkfd / kfd_kernel_queue.h

/*
 * 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.
 *
 */

#ifndef KFD_KERNEL_QUEUE_H_
#define KFD_KERNEL_QUEUE_H_

#include <linux/list.h>
#include <linux/types.h>
#include "kfd_priv.h"

/**
 * kq_acquire_packet_buffer: Returns a pointer to the location in the kernel
 * queue ring buffer where the calling function can write its packet. It is
 * Guaranteed that there is enough space for that packet. It also updates the
 * pending write pointer to that location so subsequent calls to
 * acquire_packet_buffer will get a correct write pointer
 *
 * kq_submit_packet: Update the write pointer and doorbell of a kernel queue.
 *
 * kq_rollback_packet: This routine is called if we failed to build an acquired
 * packet for some reason. It just overwrites the pending wptr with the current
 * one
 *
 */

int kq_acquire_packet_buffer(struct kernel_queue *kq,
				size_t packet_size_in_dwords,
				unsigned int **buffer_ptr);
void kq_submit_packet(struct kernel_queue *kq);
void kq_rollback_packet(struct kernel_queue *kq);


struct kernel_queue {
	/* data */
	struct kfd_dev		*dev;
	struct mqd_manager	*mqd_mgr;
	struct queue		*queue;
	uint64_t		pending_wptr64;
	uint32_t		pending_wptr;
	unsigned int		nop_packet;

	struct kfd_mem_obj	*rptr_mem;
	uint32_t		*rptr_kernel;
	uint64_t		rptr_gpu_addr;
	struct kfd_mem_obj	*wptr_mem;
	union {
		uint64_t	*wptr64_kernel;
		uint32_t	*wptr_kernel;
	};
	uint64_t		wptr_gpu_addr;
	struct kfd_mem_obj	*pq;
	uint64_t		pq_gpu_addr;
	uint32_t		*pq_kernel_addr;
	struct kfd_mem_obj	*eop_mem;
	uint64_t		eop_gpu_addr;
	uint32_t		*eop_kernel_addr;

	struct kfd_mem_obj	*fence_mem_obj;
	uint64_t		fence_gpu_addr;
	void			*fence_kernel_address;

	struct list_head	list;
};

#endif /* KFD_KERNEL_QUEUE_H_ */
Commit	Line	Data
ed6e6a34 BG	1	/*
	2	* Copyright 2014 Advanced Micro Devices, Inc.
	3	*
	4	* Permission is hereby granted, free of charge, to any person obtaining a
	5	* copy of this software and associated documentation files (the "Software"),
	6	* to deal in the Software without restriction, including without limitation
	7	* the rights to use, copy, modify, merge, publish, distribute, sublicense,
	8	* and/or sell copies of the Software, and to permit persons to whom the
	9	* Software is furnished to do so, subject to the following conditions:
	10	*
	11	* The above copyright notice and this permission notice shall be included in
	12	* all copies or substantial portions of the Software.
	13	*
	14	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
	15	* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
	16	* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
	17	* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
	18	* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
	19	* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
	20	* OTHER DEALINGS IN THE SOFTWARE.
	21	*
	22	*/
	23
	24	#ifndef KFD_KERNEL_QUEUE_H_
	25	#define KFD_KERNEL_QUEUE_H_
	26
	27	#include <linux/list.h>
	28	#include <linux/types.h>
	29	#include "kfd_priv.h"
	30
443fbd5f	31	/**
a5a4d68c	32	* kq_acquire_packet_buffer: Returns a pointer to the location in the kernel
443fbd5f OG	33	* queue ring buffer where the calling function can write its packet. It is
	34	* Guaranteed that there is enough space for that packet. It also updates the
	35	* pending write pointer to that location so subsequent calls to
	36	* acquire_packet_buffer will get a correct write pointer
	37	*
a5a4d68c	38	* kq_submit_packet: Update the write pointer and doorbell of a kernel queue.
443fbd5f	39	*
a5a4d68c	40	* kq_rollback_packet: This routine is called if we failed to build an acquired
443fbd5f OG	41	* packet for some reason. It just overwrites the pending wptr with the current
	42	* one
	43	*
	44	*/
ed6e6a34	45
a5a4d68c YZ	46	int kq_acquire_packet_buffer(struct kernel_queue *kq,
	47	size_t packet_size_in_dwords,
	48	unsigned int **buffer_ptr);
	49	void kq_submit_packet(struct kernel_queue *kq);
	50	void kq_rollback_packet(struct kernel_queue *kq);
443fbd5f	51
ed6e6a34	52
a5a4d68c	53	struct kernel_queue {
ed6e6a34 BG	54	/* data */
ed6e6a34 BG	55	struct kfd_dev *dev;
8d5f3552	56	struct mqd_manager *mqd_mgr;
ed6e6a34	57	struct queue *queue;
9d7d0248	58	uint64_t pending_wptr64;
ed6e6a34 BG	59	uint32_t pending_wptr;
	60	unsigned int nop_packet;
	61
	62	struct kfd_mem_obj *rptr_mem;
	63	uint32_t *rptr_kernel;
	64	uint64_t rptr_gpu_addr;
	65	struct kfd_mem_obj *wptr_mem;
9d7d0248 FK	66	union {
	67	uint64_t *wptr64_kernel;
	68	uint32_t *wptr_kernel;
	69	};
ed6e6a34 BG	70	uint64_t wptr_gpu_addr;
	71	struct kfd_mem_obj *pq;
	72	uint64_t pq_gpu_addr;
	73	uint32_t *pq_kernel_addr;
6898f0a5 BG	74	struct kfd_mem_obj *eop_mem;
	75	uint64_t eop_gpu_addr;
	76	uint32_t *eop_kernel_addr;
ed6e6a34 BG	77
	78	struct kfd_mem_obj *fence_mem_obj;
	79	uint64_t fence_gpu_addr;
	80	void *fence_kernel_address;
	81
	82	struct list_head list;
	83	};
	84
	85	#endif /* KFD_KERNEL_QUEUE_H_ */