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  * kq_acquire_packet_buffer: Returns a pointer to the location in the kernel
  33  * queue ring buffer where the calling function can write its packet. It is
  34  * Guaranteed that there is enough space for that packet. It also updates the
  35  * pending write pointer to that location so subsequent calls to
  36  * acquire_packet_buffer will get a correct write pointer
  37  *
  38  * kq_submit_packet: Update the write pointer and doorbell of a kernel queue.
  39  *
  40  * kq_rollback_packet: This routine is called if we failed to build an acquired
  41  * packet for some reason. It just overwrites the pending wptr with the current
  42  * one
  43  *
  44  */
  45
  46 int kq_acquire_packet_buffer(struct kernel_queue *kq,
  47                                 size_t packet_size_in_dwords,
  48                                 unsigned int **buffer_ptr);
  49 void kq_submit_packet(struct kernel_queue *kq);
  50 void kq_rollback_packet(struct kernel_queue *kq);
  51
  52
  53 struct kernel_queue {
  54         /* data */
  55         struct kfd_dev          *dev;
  56         struct mqd_manager      *mqd_mgr;
  57         struct queue            *queue;
  58         uint64_t                pending_wptr64;
  59         uint32_t                pending_wptr;
  60         unsigned int            nop_packet;
  61
  62         struct kfd_mem_obj      *rptr_mem;
  63         uint32_t                *rptr_kernel;
  64         uint64_t                rptr_gpu_addr;
  65         struct kfd_mem_obj      *wptr_mem;
  66         union {
  67                 uint64_t        *wptr64_kernel;
  68                 uint32_t        *wptr_kernel;
  69         };
  70         uint64_t                wptr_gpu_addr;
  71         struct kfd_mem_obj      *pq;
  72         uint64_t                pq_gpu_addr;
  73         uint32_t                *pq_kernel_addr;
  74         struct kfd_mem_obj      *eop_mem;
  75         uint64_t                eop_gpu_addr;
  76         uint32_t                *eop_kernel_addr;
  77
  78         struct kfd_mem_obj      *fence_mem_obj;
  79         uint64_t                fence_gpu_addr;
  80         void                    *fence_kernel_address;
  81
  82         struct list_head        list;
  83 };
  84
  85 #endif /* KFD_KERNEL_QUEUE_H_ */