cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
Log | Files | Refs | README | LICENSE | sfeed.txt

amdgpu_lsdma.c (2475B)

      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
     29int 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
     46int 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
     70int 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}