1/*
2 * Copyright 2023 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#include "amdgpu.h"
24#include "smuio_v14_0_2.h"
25#include "smuio/smuio_14_0_2_offset.h"
26#include "smuio/smuio_14_0_2_sh_mask.h"
27#include <linux/preempt.h>
28
29static u32 smuio_v14_0_2_get_rom_index_offset(struct amdgpu_device *adev)
30{
31 return SOC15_REG_OFFSET(SMUIO, 0, regROM_INDEX);
32}
33
34static u32 smuio_v14_0_2_get_rom_data_offset(struct amdgpu_device *adev)
35{
36 return SOC15_REG_OFFSET(SMUIO, 0, regROM_DATA);
37}
38
39static u64 smuio_v14_0_2_get_gpu_clock_counter(struct amdgpu_device *adev)
40{
41 u64 clock;
42 u64 clock_counter_lo, clock_counter_hi_pre, clock_counter_hi_after;
43
44 preempt_disable();
45 clock_counter_hi_pre = (u64)RREG32_SOC15(SMUIO, 0, regGOLDEN_TSC_COUNT_UPPER);
46 clock_counter_lo = (u64)RREG32_SOC15(SMUIO, 0, regGOLDEN_TSC_COUNT_LOWER);
47 /* the clock counter may be udpated during polling the counters */
48 clock_counter_hi_after = (u64)RREG32_SOC15(SMUIO, 0, regGOLDEN_TSC_COUNT_UPPER);
49 if (clock_counter_hi_pre != clock_counter_hi_after)
50 clock_counter_lo = (u64)RREG32_SOC15(SMUIO, 0, regGOLDEN_TSC_COUNT_LOWER);
51 preempt_enable();
52
53 clock = clock_counter_lo | (clock_counter_hi_after << 32ULL);
54
55 return clock;
56}
57
58const struct amdgpu_smuio_funcs smuio_v14_0_2_funcs = {
59 .get_rom_index_offset = smuio_v14_0_2_get_rom_index_offset,
60 .get_rom_data_offset = smuio_v14_0_2_get_rom_data_offset,
61 .get_gpu_clock_counter = smuio_v14_0_2_get_gpu_clock_counter,
62};
63

source code of linux/drivers/gpu/drm/amd/amdgpu/smuio_v14_0_2.c