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 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 for (i = 0; i < adev->usec_timeout; i++) { 37 val = RREG32(reg_index); 38 if ((val & mask) == reg_val) 39 return 0; 40 udelay(1); 41 } 42 43 return -ETIME; 44 } 45 46 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 if (mem_size == 0) 54 return -EINVAL; 55 56 while (mem_size > 0) { 57 uint64_t current_copy_size = min(mem_size, AMDGPU_LSDMA_MAX_SIZE); 58 59 ret = adev->lsdma.funcs->copy_mem(adev, src_addr, dst_addr, current_copy_size); 60 if (ret) 61 return ret; 62 src_addr += current_copy_size; 63 dst_addr += current_copy_size; 64 mem_size -= current_copy_size; 65 } 66 67 return 0; 68 } 69 70 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 if (mem_size == 0) 78 return -EINVAL; 79 80 while (mem_size > 0) { 81 uint64_t current_fill_size = min(mem_size, AMDGPU_LSDMA_MAX_SIZE); 82 83 ret = adev->lsdma.funcs->fill_mem(adev, dst_addr, data, current_fill_size); 84 if (ret) 85 return ret; 86 dst_addr += current_fill_size; 87 mem_size -= current_fill_size; 88 } 89 90 return 0; 91 } 92