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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 a6 * copy of this software and associated documentation files (the "Software"),7 * to deal in the Software without restriction, including without limitation8 * the rights to use, copy, modify, merge, publish, distribute, sublicense,9 * and/or sell copies of the Software, and to permit persons to whom the10 * Software is furnished to do so, subject to the following conditions:11 *12 * The above copyright notice and this permission notice shall be included in13 * all copies or substantial portions of the Software.14 *15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL18 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR19 * 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 OR21 * 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 kernel34 * queue ring buffer where the calling function can write its packet. It is35 * Guaranteed that there is enough space for that packet. It also updates the36 * pending write pointer to that location so subsequent calls to37 * acquire_packet_buffer will get a correct write pointer38 *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 acquired42 * packet for some reason. It just overwrites the pending wptr with the current43 * one44 *45 */46 47int kq_acquire_packet_buffer(struct kernel_queue *kq,48 size_t packet_size_in_dwords,49 unsigned int **buffer_ptr);50int kq_submit_packet(struct kernel_queue *kq);51void kq_rollback_packet(struct kernel_queue *kq);52 53 54struct 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