1 /* SPDX-License-Identifier: GPL-2.0 OR MIT */
2 /*
3  * Copyright 2014-2022 Advanced Micro Devices, Inc.
4  *
5  * Permission is hereby granted, free of charge, to any person obtaining a
6  * copy of this software and associated documentation files (the "Software"),
7  * to deal in the Software without restriction, including without limitation
8  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
9  * and/or sell copies of the Software, and to permit persons to whom the
10  * Software is furnished to do so, subject to the following conditions:
11  *
12  * The above copyright notice and this permission notice shall be included in
13  * all copies or substantial portions of the Software.
14  *
15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
18  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
19  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
20  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
21  * OTHER DEALINGS IN THE SOFTWARE.
22  *
23  */
24 
25 #ifndef KFD_KERNEL_QUEUE_H_
26 #define KFD_KERNEL_QUEUE_H_
27 
28 #include <linux/list.h>
29 #include <linux/types.h>
30 #include "kfd_priv.h"
31 
32 /**
33  * kq_acquire_packet_buffer: Returns a pointer to the location in the kernel
34  * queue ring buffer where the calling function can write its packet. It is
35  * Guaranteed that there is enough space for that packet. It also updates the
36  * pending write pointer to that location so subsequent calls to
37  * acquire_packet_buffer will get a correct write pointer
38  *
39  * kq_submit_packet: Update the write pointer and doorbell of a kernel queue.
40  *
41  * kq_rollback_packet: This routine is called if we failed to build an acquired
42  * packet for some reason. It just overwrites the pending wptr with the current
43  * one
44  *
45  */
46 
47 int kq_acquire_packet_buffer(struct kernel_queue *kq,
48 				size_t packet_size_in_dwords,
49 				unsigned int **buffer_ptr);
50 void kq_submit_packet(struct kernel_queue *kq);
51 void kq_rollback_packet(struct kernel_queue *kq);
52 
53 
54 struct kernel_queue {
55 	/* data */
56 	struct kfd_node		*dev;
57 	struct mqd_manager	*mqd_mgr;
58 	struct queue		*queue;
59 	uint64_t		pending_wptr64;
60 	uint32_t		pending_wptr;
61 	unsigned int		nop_packet;
62 
63 	struct kfd_mem_obj	*rptr_mem;
64 	uint32_t		*rptr_kernel;
65 	uint64_t		rptr_gpu_addr;
66 	struct kfd_mem_obj	*wptr_mem;
67 	union {
68 		uint64_t	*wptr64_kernel;
69 		uint32_t	*wptr_kernel;
70 	};
71 	uint64_t		wptr_gpu_addr;
72 	struct kfd_mem_obj	*pq;
73 	uint64_t		pq_gpu_addr;
74 	uint32_t		*pq_kernel_addr;
75 	struct kfd_mem_obj	*eop_mem;
76 	uint64_t		eop_gpu_addr;
77 	uint32_t		*eop_kernel_addr;
78 
79 	struct kfd_mem_obj	*fence_mem_obj;
80 	uint64_t		fence_gpu_addr;
81 	void			*fence_kernel_address;
82 
83 	struct list_head	list;
84 };
85 
86 #endif /* KFD_KERNEL_QUEUE_H_ */
87