forked from Minki/linux
6898f0a568
This patch starts to add support for the VI APU in the KQ (kernel queue) module. Because most (more than 90%) of the KQ code is shared among AMD's APUs, we chose a design that performs most/all the code in the shared KQ file (kfd_kernel_queue.c). If there is H/W specific code to be executed, than it is written in an asic-specific extension function for that H/W. That asic-specific extension function is called from the shared function at the appropriate time. This requires that for every asic-specific extension function that is implemented in a specific ASIC, there will be an equivalent implementation in ALL ASICs, even if those implementations are just stubs. That way we achieve: - Maintainability: by having one copy of most of the code, we only need to fix bugs at one locations - Readability: very clear what is the shared code and what is done per ASIC - Extensibility: very easy to add new H/W specific files/functions Signed-off-by: Ben Goz <ben.goz@amd.com> Signed-off-by: Oded Gabbay <oded.gabbay@amd.com> Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
104 lines
3.5 KiB
C
104 lines
3.5 KiB
C
/*
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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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* struct kernel_queue_ops
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*
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* @initialize: Initialize a kernel queue, including allocations of GART memory
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* needed for the queue.
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*
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* @uninitialize: Uninitialize a kernel queue and free all its memory usages.
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*
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* @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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* @submit_packet: Update the write pointer and doorbell of a kernel queue.
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*
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* @sync_with_hw: Wait until the write pointer and the read pointer of a kernel
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* queue are equal, which means the CP has read all the submitted packets.
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*
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* @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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struct kernel_queue_ops {
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bool (*initialize)(struct kernel_queue *kq, struct kfd_dev *dev,
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enum kfd_queue_type type, unsigned int queue_size);
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void (*uninitialize)(struct kernel_queue *kq);
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int (*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 (*submit_packet)(struct kernel_queue *kq);
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int (*sync_with_hw)(struct kernel_queue *kq,
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unsigned long timeout_ms);
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void (*rollback_packet)(struct kernel_queue *kq);
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};
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struct kernel_queue {
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struct kernel_queue_ops ops;
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struct kernel_queue_ops ops_asic_specific;
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/* data */
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struct kfd_dev *dev;
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struct mqd_manager *mqd;
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struct queue *queue;
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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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uint32_t *wptr_kernel;
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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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void kernel_queue_init_cik(struct kernel_queue_ops *ops);
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void kernel_queue_init_vi(struct kernel_queue_ops *ops);
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#endif /* KFD_KERNEL_QUEUE_H_ */
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