2 * Copyright 2014 Advanced Micro Devices, Inc.
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:
11 * The above copyright notice and this permission notice shall be included in
12 * all copies or substantial portions of the Software.
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
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24 #ifndef KFD_KERNEL_QUEUE_H_
25 #define KFD_KERNEL_QUEUE_H_
27 #include <linux/list.h>
28 #include <linux/types.h>
32 * struct kernel_queue_ops
34 * @initialize: Initialize a kernel queue, including allocations of GART memory
35 * needed for the queue.
37 * @uninitialize: Uninitialize a kernel queue and free all its memory usages.
39 * @acquire_packet_buffer: Returns a pointer to the location in the kernel
40 * queue ring buffer where the calling function can write its packet. It is
41 * Guaranteed that there is enough space for that packet. It also updates the
42 * pending write pointer to that location so subsequent calls to
43 * acquire_packet_buffer will get a correct write pointer
45 * @submit_packet: Update the write pointer and doorbell of a kernel queue.
47 * @sync_with_hw: Wait until the write pointer and the read pointer of a kernel
48 * queue are equal, which means the CP has read all the submitted packets.
50 * @rollback_packet: This routine is called if we failed to build an acquired
51 * packet for some reason. It just overwrites the pending wptr with the current
55 struct kernel_queue_ops {
56 bool (*initialize)(struct kernel_queue *kq, struct kfd_dev *dev,
57 enum kfd_queue_type type, unsigned int queue_size);
58 void (*uninitialize)(struct kernel_queue *kq);
59 int (*acquire_packet_buffer)(struct kernel_queue *kq,
60 size_t packet_size_in_dwords,
61 unsigned int **buffer_ptr);
63 void (*submit_packet)(struct kernel_queue *kq);
64 void (*rollback_packet)(struct kernel_queue *kq);
68 struct kernel_queue_ops ops;
69 struct kernel_queue_ops ops_asic_specific;
73 struct mqd_manager *mqd;
75 uint32_t pending_wptr;
76 unsigned int nop_packet;
78 struct kfd_mem_obj *rptr_mem;
79 uint32_t *rptr_kernel;
80 uint64_t rptr_gpu_addr;
81 struct kfd_mem_obj *wptr_mem;
82 uint32_t *wptr_kernel;
83 uint64_t wptr_gpu_addr;
84 struct kfd_mem_obj *pq;
86 uint32_t *pq_kernel_addr;
87 struct kfd_mem_obj *eop_mem;
88 uint64_t eop_gpu_addr;
89 uint32_t *eop_kernel_addr;
91 struct kfd_mem_obj *fence_mem_obj;
92 uint64_t fence_gpu_addr;
93 void *fence_kernel_address;
95 struct list_head list;
98 void kernel_queue_init_cik(struct kernel_queue_ops *ops);
99 void kernel_queue_init_vi(struct kernel_queue_ops *ops);
101 #endif /* KFD_KERNEL_QUEUE_H_ */