drivers/gpu/drm/amd/amdgpu/smuio_v14_0_2.c

Source file repositories/reference/linux-study-clean/drivers/gpu/drm/amd/amdgpu/smuio_v14_0_2.c

File Facts

System
Linux kernel
Corpus path
drivers/gpu/drm/amd/amdgpu/smuio_v14_0_2.c
Extension
.c
Size
2506 bytes
Lines
63
Domain
Driver Families
Bucket
drivers/gpu
Inferred role
Driver Families: implementation source
Status
source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

#include "amdgpu.h"
#include "smuio_v14_0_2.h"
#include "smuio/smuio_14_0_2_offset.h"
#include "smuio/smuio_14_0_2_sh_mask.h"
#include <linux/preempt.h>

static u32 smuio_v14_0_2_get_rom_index_offset(struct amdgpu_device *adev)
{
	return SOC15_REG_OFFSET(SMUIO, 0, regROM_INDEX);
}

static u32 smuio_v14_0_2_get_rom_data_offset(struct amdgpu_device *adev)
{
	return SOC15_REG_OFFSET(SMUIO, 0, regROM_DATA);
}

static u64 smuio_v14_0_2_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_v14_0_2_funcs = {
	.get_rom_index_offset = smuio_v14_0_2_get_rom_index_offset,
	.get_rom_data_offset = smuio_v14_0_2_get_rom_data_offset,
	.get_gpu_clock_counter = smuio_v14_0_2_get_gpu_clock_counter,
};

Annotation

Implementation Notes