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 * kq_acquire_packet_buffer: Returns a pointer to the location in the kernel 33 * queue ring buffer where the calling function can write its packet. It is 34 * Guaranteed that there is enough space for that packet. It also updates the 35 * pending write pointer to that location so subsequent calls to 36 * acquire_packet_buffer will get a correct write pointer 37 * 38 * kq_submit_packet: Update the write pointer and doorbell of a kernel queue. 39 * 40 * kq_rollback_packet: This routine is called if we failed to build an acquired 41 * packet for some reason. It just overwrites the pending wptr with the current 42 * one 43 * 44 */ 45 46 int kq_acquire_packet_buffer(struct kernel_queue *kq, 47 size_t packet_size_in_dwords, 48 unsigned int **buffer_ptr); 49 void kq_submit_packet(struct kernel_queue *kq); 50 void kq_rollback_packet(struct kernel_queue *kq); 51 52 53 struct kernel_queue { 54 /* data */ 55 struct kfd_dev *dev; 56 struct mqd_manager *mqd_mgr; 57 struct queue *queue; 58 uint64_t pending_wptr64; 59 uint32_t pending_wptr; 60 unsigned int nop_packet; 61 62 struct kfd_mem_obj *rptr_mem; 63 uint32_t *rptr_kernel; 64 uint64_t rptr_gpu_addr; 65 struct kfd_mem_obj *wptr_mem; 66 union { 67 uint64_t *wptr64_kernel; 68 uint32_t *wptr_kernel; 69 }; 70 uint64_t wptr_gpu_addr; 71 struct kfd_mem_obj *pq; 72 uint64_t pq_gpu_addr; 73 uint32_t *pq_kernel_addr; 74 struct kfd_mem_obj *eop_mem; 75 uint64_t eop_gpu_addr; 76 uint32_t *eop_kernel_addr; 77 78 struct kfd_mem_obj *fence_mem_obj; 79 uint64_t fence_gpu_addr; 80 void *fence_kernel_address; 81 82 struct list_head list; 83 }; 84 85 #endif /* KFD_KERNEL_QUEUE_H_ */ 86