Line data    Source code

       1             : /*
       2             :  * Copyright 2022 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             : #include "amdgpu.h"
      25             : #include "amdgpu_lsdma.h"
      26             : 
      27             : #define AMDGPU_LSDMA_MAX_SIZE   0x2000000ULL
      28             : 
      29           0 : int amdgpu_lsdma_wait_for(struct amdgpu_device *adev,
      30             :                           uint32_t reg_index, uint32_t reg_val,
      31             :                           uint32_t mask)
      32             : {
      33             :         uint32_t val;
      34             :         int i;
      35             : 
      36           0 :         for (i = 0; i < adev->usec_timeout; i++) {
      37           0 :                 val = RREG32(reg_index);
      38           0 :                 if ((val & mask) == reg_val)
      39             :                         return 0;
      40           0 :                 udelay(1);
      41             :         }
      42             : 
      43             :         return -ETIME;
      44             : }
      45             : 
      46           0 : int amdgpu_lsdma_copy_mem(struct amdgpu_device *adev,
      47             :                           uint64_t src_addr,
      48             :                           uint64_t dst_addr,
      49             :                           uint64_t mem_size)
      50             : {
      51             :         int ret;
      52             : 
      53           0 :         if (mem_size == 0)
      54             :                 return -EINVAL;
      55             : 
      56           0 :         while (mem_size > 0) {
      57           0 :                 uint64_t current_copy_size = min(mem_size, AMDGPU_LSDMA_MAX_SIZE);
      58             : 
      59           0 :                 ret = adev->lsdma.funcs->copy_mem(adev, src_addr, dst_addr, current_copy_size);
      60           0 :                 if (ret)
      61             :                         return ret;
      62           0 :                 src_addr += current_copy_size;
      63           0 :                 dst_addr += current_copy_size;
      64           0 :                 mem_size -= current_copy_size;
      65             :         }
      66             : 
      67             :         return 0;
      68             : }
      69             : 
      70           0 : int amdgpu_lsdma_fill_mem(struct amdgpu_device *adev,
      71             :                           uint64_t dst_addr,
      72             :                           uint32_t data,
      73             :                           uint64_t mem_size)
      74             : {
      75             :         int ret;
      76             : 
      77           0 :         if (mem_size == 0)
      78             :                 return -EINVAL;
      79             : 
      80           0 :         while (mem_size > 0) {
      81           0 :                 uint64_t current_fill_size = min(mem_size, AMDGPU_LSDMA_MAX_SIZE);
      82             : 
      83           0 :                 ret = adev->lsdma.funcs->fill_mem(adev, dst_addr, data, current_fill_size);
      84           0 :                 if (ret)
      85             :                         return ret;
      86           0 :                 dst_addr += current_fill_size;
      87           0 :                 mem_size -= current_fill_size;
      88             :         }
      89             : 
      90             :         return 0;
      91             : }