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/* SPDX-License-Identifier: GPL-2.0 OR MIT */
/*
* Copyright 2014-2022 Advanced Micro Devices, Inc.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*
*/
#ifndef KFD_KERNEL_QUEUE_H_
#define KFD_KERNEL_QUEUE_H_
#include <linux/list.h>
#include <linux/types.h>
#include "kfd_priv.h"
/**
* kq_acquire_packet_buffer: Returns a pointer to the location in the kernel
* queue ring buffer where the calling function can write its packet. It is
* Guaranteed that there is enough space for that packet. It also updates the
* pending write pointer to that location so subsequent calls to
* acquire_packet_buffer will get a correct write pointer
*
* kq_submit_packet: Update the write pointer and doorbell of a kernel queue.
*
* kq_rollback_packet: This routine is called if we failed to build an acquired
* packet for some reason. It just overwrites the pending wptr with the current
* one
*
*/
int kq_acquire_packet_buffer(struct kernel_queue *kq,
size_t packet_size_in_dwords,
unsigned int **buffer_ptr);
void kq_submit_packet(struct kernel_queue *kq);
void kq_rollback_packet(struct kernel_queue *kq);
struct kernel_queue {
/* data */
struct kfd_dev *dev;
struct mqd_manager *mqd_mgr;
struct queue *queue;
uint64_t pending_wptr64;
uint32_t pending_wptr;
unsigned int nop_packet;
struct kfd_mem_obj *rptr_mem;
uint32_t *rptr_kernel;
uint64_t rptr_gpu_addr;
struct kfd_mem_obj *wptr_mem;
union {
uint64_t *wptr64_kernel;
uint32_t *wptr_kernel;
};
uint64_t wptr_gpu_addr;
struct kfd_mem_obj *pq;
uint64_t pq_gpu_addr;
uint32_t *pq_kernel_addr;
struct kfd_mem_obj *eop_mem;
uint64_t eop_gpu_addr;
uint32_t *eop_kernel_addr;
struct kfd_mem_obj *fence_mem_obj;
uint64_t fence_gpu_addr;
void *fence_kernel_address;
struct list_head list;
};
#endif /* KFD_KERNEL_QUEUE_H_ */
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