1 /* 2 * Copyright 2025 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_v15_0_0.h" 25 #include "smuio/smuio_15_0_0_offset.h" 26 #include "smuio/smuio_15_0_0_sh_mask.h" 27 #include <linux/preempt.h> 28 29 static u64 smuio_v15_0_0_get_gpu_clock_counter(struct amdgpu_device *adev) 30 { 31 u64 clock; 32 u64 clock_counter_lo, clock_counter_hi_pre, clock_counter_hi_after; 33 34 preempt_disable(); 35 clock_counter_hi_pre = (u64)RREG32_SOC15(SMUIO, 0, regGOLDEN_TSC_COUNT_UPPER); 36 clock_counter_lo = (u64)RREG32_SOC15(SMUIO, 0, regGOLDEN_TSC_COUNT_LOWER); 37 /* the clock counter may be udpated during polling the counters */ 38 clock_counter_hi_after = (u64)RREG32_SOC15(SMUIO, 0, regGOLDEN_TSC_COUNT_UPPER); 39 if (clock_counter_hi_pre != clock_counter_hi_after) 40 clock_counter_lo = (u64)RREG32_SOC15(SMUIO, 0, regGOLDEN_TSC_COUNT_LOWER); 41 preempt_enable(); 42 43 clock = clock_counter_lo | (clock_counter_hi_after << 32ULL); 44 45 return clock; 46 } 47 48 const struct amdgpu_smuio_funcs smuio_v15_0_0_funcs = { 49 .get_gpu_clock_counter = smuio_v15_0_0_get_gpu_clock_counter, 50 }; 51