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 31/** 32 * struct kernel_queue_ops 33 * 34 * @initialize: Initialize a kernel queue, including allocations of GART memory 35 * needed for the queue. 36 * 37 * @uninitialize: Uninitialize a kernel queue and free all its memory usages. 38 * 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 44 * 45 * @submit_packet: Update the write pointer and doorbell of a kernel queue. 46 * 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. 49 * 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 52 * one 53 * 54 */ 55struct 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); 62 63 void (*submit_packet)(struct kernel_queue *kq); 64 void (*rollback_packet)(struct kernel_queue *kq); 65}; 66 67struct kernel_queue { 68 struct kernel_queue_ops ops; 69 struct kernel_queue_ops ops_asic_specific; 70 71 /* data */ 72 struct kfd_dev *dev; 73 struct mqd_manager *mqd; 74 struct queue *queue; 75 uint32_t pending_wptr; 76 unsigned int nop_packet; 77 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; 85 uint64_t pq_gpu_addr; 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; 90 91 struct kfd_mem_obj *fence_mem_obj; 92 uint64_t fence_gpu_addr; 93 void *fence_kernel_address; 94 95 struct list_head list; 96}; 97 98void kernel_queue_init_cik(struct kernel_queue_ops *ops); 99void kernel_queue_init_vi(struct kernel_queue_ops *ops); 100 101#endif /* KFD_KERNEL_QUEUE_H_ */ 102