cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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kfd_kernel_queue.h (2867B)

      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
     47int kq_acquire_packet_buffer(struct kernel_queue *kq,
     48				size_t packet_size_in_dwords,
     49				unsigned int **buffer_ptr);
     50void 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_dev		*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_ */