drm/amd: Enable SMUIO 15_0_0 support

Add SMUIO 15_0_0.

Signed-off-by: Pratik Vishwakarma <Pratik.Vishwakarma@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

Author: amd-pvishwak

drivers/gpu/drm/amd/amdgpu/Makefile

@@ -253,6 +253,7 @@ amdgpu-y += \
 	smuio_v13_0_3.o \
 	smuio_v13_0_6.o \
 	smuio_v14_0_2.o \
+	smuio_v15_0_0.o \
 	smuio_v15_0_8.o
 
 # add reset block

drivers/gpu/drm/amd/amdgpu/amdgpu_discovery.c

@@ -107,6 +107,7 @@
 #include "smuio_v13_0_3.h"
 #include "smuio_v13_0_6.h"
 #include "smuio_v14_0_2.h"
+#include "smuio_v15_0_0.h"
 #include "smuio_v15_0_8.h"
 #include "vcn_v5_0_0.h"
 #include "vcn_v5_0_1.h"
@@ -3192,6 +3193,9 @@ int amdgpu_discovery_set_ip_blocks(struct amdgpu_device *adev)
 	case IP_VERSION(14, 0, 2):
 		adev->smuio.funcs = &smuio_v14_0_2_funcs;
 		break;
+	case IP_VERSION(15, 0, 0):
+		adev->smuio.funcs = &smuio_v15_0_0_funcs;
+		break;
 	case IP_VERSION(15, 0, 8):
 		adev->smuio.funcs = &smuio_v15_0_8_funcs;
 		break;

drivers/gpu/drm/amd/amdgpu/smuio_v15_0_0.c

@@ -0,0 +1,50 @@
+/*
+ * Copyright 2025 Advanced Micro Devices, Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ *
+ */
+#include "amdgpu.h"
+#include "smuio_v15_0_0.h"
+#include "smuio/smuio_15_0_0_offset.h"
+#include "smuio/smuio_15_0_0_sh_mask.h"
+#include <linux/preempt.h>
+
+static u64 smuio_v15_0_0_get_gpu_clock_counter(struct amdgpu_device *adev)
+{
+	u64 clock;
+	u64 clock_counter_lo, clock_counter_hi_pre, clock_counter_hi_after;
+
+	preempt_disable();
+	clock_counter_hi_pre = (u64)RREG32_SOC15(SMUIO, 0, regGOLDEN_TSC_COUNT_UPPER);
+	clock_counter_lo = (u64)RREG32_SOC15(SMUIO, 0, regGOLDEN_TSC_COUNT_LOWER);
+	/* the clock counter may be udpated during polling the counters */
+	clock_counter_hi_after = (u64)RREG32_SOC15(SMUIO, 0, regGOLDEN_TSC_COUNT_UPPER);
+	if (clock_counter_hi_pre != clock_counter_hi_after)
+		clock_counter_lo = (u64)RREG32_SOC15(SMUIO, 0, regGOLDEN_TSC_COUNT_LOWER);
+	preempt_enable();
+
+	clock = clock_counter_lo | (clock_counter_hi_after << 32ULL);
+
+	return clock;
+}
+
+const struct amdgpu_smuio_funcs smuio_v15_0_0_funcs = {
+	.get_gpu_clock_counter = smuio_v15_0_0_get_gpu_clock_counter,
+};

drivers/gpu/drm/amd/amdgpu/smuio_v15_0_0.h

@@ -0,0 +1,30 @@
+/*
+ * Copyright 2025 Advanced Micro Devices, Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ *
+ */
+#ifndef __SMUIO_V15_0_0_H__
+#define __SMUIO_V15_0_0_H__
+
+#include "soc15_common.h"
+
+extern const struct amdgpu_smuio_funcs smuio_v15_0_0_funcs;
+
+#endif /* __SMUIO_V15_0_0_H__ */