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 int 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