1 /* $NetBSD: kfd_kernel_queue.h,v 1.3 2021/12/18 23:44:59 riastradh Exp $ */ 2 3 /* 4 * Copyright 2014 Advanced Micro Devices, Inc. 5 * 6 * Permission is hereby granted, free of charge, to any person obtaining a 7 * copy of this software and associated documentation files (the "Software"), 8 * to deal in the Software without restriction, including without limitation 9 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 10 * and/or sell copies of the Software, and to permit persons to whom the 11 * Software is furnished to do so, subject to the following conditions: 12 * 13 * The above copyright notice and this permission notice shall be included in 14 * all copies or substantial portions of the Software. 15 * 16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 19 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR 20 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 21 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 22 * OTHER DEALINGS IN THE SOFTWARE. 23 * 24 */ 25 26 #ifndef KFD_KERNEL_QUEUE_H_ 27 #define KFD_KERNEL_QUEUE_H_ 28 29 #include <linux/list.h> 30 #include <linux/types.h> 31 #include "kfd_priv.h" 32 33 /** 34 * kq_acquire_packet_buffer: Returns a pointer to the location in the kernel 35 * queue ring buffer where the calling function can write its packet. It is 36 * Guaranteed that there is enough space for that packet. It also updates the 37 * pending write pointer to that location so subsequent calls to 38 * acquire_packet_buffer will get a correct write pointer 39 * 40 * kq_submit_packet: Update the write pointer and doorbell of a kernel queue. 41 * 42 * kq_rollback_packet: This routine is called if we failed to build an acquired 43 * packet for some reason. It just overwrites the pending wptr with the current 44 * one 45 * 46 */ 47 48 int kq_acquire_packet_buffer(struct kernel_queue *kq, 49 size_t packet_size_in_dwords, 50 unsigned int **buffer_ptr); 51 void kq_submit_packet(struct kernel_queue *kq); 52 void kq_rollback_packet(struct kernel_queue *kq); 53 54 55 struct kernel_queue { 56 /* data */ 57 struct kfd_dev *dev; 58 struct mqd_manager *mqd_mgr; 59 struct queue *queue; 60 uint64_t pending_wptr64; 61 uint32_t pending_wptr; 62 unsigned int nop_packet; 63 64 struct kfd_mem_obj *rptr_mem; 65 uint32_t *rptr_kernel; 66 uint64_t rptr_gpu_addr; 67 struct kfd_mem_obj *wptr_mem; 68 union { 69 uint64_t *wptr64_kernel; 70 uint32_t *wptr_kernel; 71 }; 72 uint64_t wptr_gpu_addr; 73 struct kfd_mem_obj *pq; 74 uint64_t pq_gpu_addr; 75 uint32_t *pq_kernel_addr; 76 struct kfd_mem_obj *eop_mem; 77 uint64_t eop_gpu_addr; 78 uint32_t *eop_kernel_addr; 79 80 struct kfd_mem_obj *fence_mem_obj; 81 uint64_t fence_gpu_addr; 82 void *fence_kernel_address; 83 84 struct list_head list; 85 }; 86 87 #endif /* KFD_KERNEL_QUEUE_H_ */ 88