drivers/gpu/drm/amd/amdkfd/kfd_kernel_queue.h

   1 /*
   2  * Copyright 2014 Advanced Micro Devices, Inc.
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice shall be included in
  12  * all copies or substantial portions of the Software.
  13  *
  14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  15  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  17  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
  18  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  19  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  20  * OTHER DEALINGS IN THE SOFTWARE.
  21  *
  22  */
  23
  24 #ifndef KFD_KERNEL_QUEUE_H_
  25 #define KFD_KERNEL_QUEUE_H_
  26
  27 #include <linux/list.h>
  28 #include <linux/types.h>
  29 #include "kfd_priv.h"
  30
  31 /**
  32  * struct kernel_queue_ops
  33  *
  34  * @initialize: Initialize a kernel queue, including allocations of GART memory
  35  * needed for the queue.
  36  *
  37  * @uninitialize: Uninitialize a kernel queue and free all its memory usages.
  38  *
  39  * @acquire_packet_buffer: Returns a pointer to the location in the kernel
  40  * queue ring buffer where the calling function can write its packet. It is
  41  * Guaranteed that there is enough space for that packet. It also updates the
  42  * pending write pointer to that location so subsequent calls to
  43  * acquire_packet_buffer will get a correct write pointer
  44  *
  45  * @submit_packet: Update the write pointer and doorbell of a kernel queue.
  46  *
  47  * @sync_with_hw: Wait until the write pointer and the read pointer of a kernel
  48  * queue are equal, which means the CP has read all the submitted packets.
  49  *
  50  * @rollback_packet: This routine is called if we failed to build an acquired
  51  * packet for some reason. It just overwrites the pending wptr with the current
  52  * one
  53  *
  54  */
  55 struct kernel_queue_ops {
  56         bool    (*initialize)(struct kernel_queue *kq, struct kfd_dev *dev,
  57                         enum kfd_queue_type type, unsigned int queue_size);
  58         void    (*uninitialize)(struct kernel_queue *kq);
  59         int     (*acquire_packet_buffer)(struct kernel_queue *kq,
  60                                         size_t packet_size_in_dwords,
  61                                         unsigned int **buffer_ptr);
  62
  63         void    (*submit_packet)(struct kernel_queue *kq);
  64         void    (*rollback_packet)(struct kernel_queue *kq);
  65 };
  66
  67 struct kernel_queue {
  68         struct kernel_queue_ops ops;
  69         struct kernel_queue_ops ops_asic_specific;
  70
  71         /* data */
  72         struct kfd_dev          *dev;
  73         struct mqd_manager      *mqd_mgr;
  74         struct queue            *queue;
  75         uint64_t                pending_wptr64;
  76         uint32_t                pending_wptr;
  77         unsigned int            nop_packet;
  78
  79         struct kfd_mem_obj      *rptr_mem;
  80         uint32_t                *rptr_kernel;
  81         uint64_t                rptr_gpu_addr;
  82         struct kfd_mem_obj      *wptr_mem;
  83         union {
  84                 uint64_t        *wptr64_kernel;
  85                 uint32_t        *wptr_kernel;
  86         };
  87         uint64_t                wptr_gpu_addr;
  88         struct kfd_mem_obj      *pq;
  89         uint64_t                pq_gpu_addr;
  90         uint32_t                *pq_kernel_addr;
  91         struct kfd_mem_obj      *eop_mem;
  92         uint64_t                eop_gpu_addr;
  93         uint32_t                *eop_kernel_addr;
  94
  95         struct kfd_mem_obj      *fence_mem_obj;
  96         uint64_t                fence_gpu_addr;
  97         void                    *fence_kernel_address;
  98
  99         struct list_head        list;
 100 };
 101
 102 void kernel_queue_init_cik(struct kernel_queue_ops *ops);
 103 void kernel_queue_init_vi(struct kernel_queue_ops *ops);
 104 void kernel_queue_init_v9(struct kernel_queue_ops *ops);
 105
 106 #endif /* KFD_KERNEL_QUEUE_H_ */