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