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| 2 | * Copyright 2022 Advanced Micro Devices, Inc.
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| 3 | *
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| 4 | * Permission is hereby granted, free of charge, to any person obtaining a
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| 5 | * copy of this software and associated documentation files (the "Software"),
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| 6 | * to deal in the Software without restriction, including without limitation
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| 7 | * the rights to use, copy, modify, merge, publish, distribute, sublicense,
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| 8 | * and/or sell copies of the Software, and to permit persons to whom the
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| 9 | * Software is furnished to do so, subject to the following conditions:
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| 10 | *
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| 11 | * The above copyright notice and this permission notice shall be included in
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| 12 | * all copies or substantial portions of the Software.
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| 13 | *
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| 14 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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| 15 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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| 16 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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| 17 | * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
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| 18 | * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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| 19 | * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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| 20 | * OTHER DEALINGS IN THE SOFTWARE.
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| 21 | *
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| 22 |
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| 23 |
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| 24 | #include "amdgpu.h"
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| 25 | #include "amdgpu_lsdma.h"
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| 26 |
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| 27 | #define AMDGPU_LSDMA_MAX_SIZE 0x2000000ULL
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| 28 |
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| 29 | int amdgpu_lsdma_wait_for(struct amdgpu_device *adev,
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| 30 | uint32_t reg_index, uint32_t reg_val,
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| 31 | uint32_t mask)
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| 32 | {
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| 33 | uint32_t val;
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| 34 | int i;
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| 35 |
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| 36 | for (i = 0; i < adev->usec_timeout; i++) {
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| 37 | val = RREG32(reg_index);
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| 38 | if ((val & mask) == reg_val)
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| 39 | return 0;
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| 40 | udelay(1);
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| 41 | }
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| 42 |
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| 43 | return -ETIME;
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| 44 | }
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| 45 |
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| 46 | int amdgpu_lsdma_copy_mem(struct amdgpu_device *adev,
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| 47 | uint64_t src_addr,
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| 48 | uint64_t dst_addr,
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| 49 | uint64_t mem_size)
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| 50 | {
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| 51 | int ret;
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| 52 |
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| 53 | if (mem_size == 0)
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| 54 | return -EINVAL;
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| 55 |
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| 56 | while (mem_size > 0) {
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| 57 | uint64_t current_copy_size = min(mem_size, AMDGPU_LSDMA_MAX_SIZE);
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| 58 |
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| 59 | ret = adev->lsdma.funcs->copy_mem(adev, src_addr, dst_addr, current_copy_size);
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| 60 | if (ret)
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| 61 | return ret;
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| 62 | src_addr += current_copy_size;
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| 63 | dst_addr += current_copy_size;
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| 64 | mem_size -= current_copy_size;
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| 65 | }
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| 66 |
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| 67 | return 0;
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| 68 | }
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| 69 |
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| 70 | int amdgpu_lsdma_fill_mem(struct amdgpu_device *adev,
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| 71 | uint64_t dst_addr,
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| 72 | uint32_t data,
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| 73 | uint64_t mem_size)
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| 74 | {
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| 75 | int ret;
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| 76 |
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| 77 | if (mem_size == 0)
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| 78 | return -EINVAL;
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| 79 |
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| 80 | while (mem_size > 0) {
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| 81 | uint64_t current_fill_size = min(mem_size, AMDGPU_LSDMA_MAX_SIZE);
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| 82 |
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| 83 | ret = adev->lsdma.funcs->fill_mem(adev, dst_addr, data, current_fill_size);
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| 84 | if (ret)
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| 85 | return ret;
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| 86 | dst_addr += current_fill_size;
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| 87 | mem_size -= current_fill_size;
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| 88 | }
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| 89 |
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| 90 | return 0;
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| 91 | }
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