drivers/gpu/drm/amd/amdgpu/imu_v12_0.c

Source file repositories/reference/linux-study-clean/drivers/gpu/drm/amd/amdgpu/imu_v12_0.c

File Facts

System
Linux kernel
Corpus path
drivers/gpu/drm/amd/amdgpu/imu_v12_0.c
Extension
.c
Size
17260 bytes
Lines
407
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

if (reg == SOC15_REG_OFFSET(GC, 0, regGRBM_GFX_INDEX)) {
			val_l = imu_v12_0_grbm_gfx_index_remap(adev, data, false);
			val_h = imu_v12_0_grbm_gfx_index_remap(adev, data, true);
		} else {
			WREG32_SOC15(GC, 0, regGFX_IMU_RLC_RAM_ADDR_HIGH, val_h);
			WREG32_SOC15(GC, 0, regGFX_IMU_RLC_RAM_ADDR_LOW, reg | val_l);
			WREG32_SOC15(GC, 0, regGFX_IMU_RLC_RAM_DATA, data);
		}
	}
}

static void imu_v12_0_program_rlc_ram(struct amdgpu_device *adev)
{
	u32 reg_data, size = 0;
	const u32 *data = NULL;
	int r = -EINVAL;

	WREG32_SOC15(GC, 0, regGFX_IMU_RLC_RAM_INDEX, 0x2);

	switch (amdgpu_ip_version(adev, GC_HWIP, 0)) {
	case IP_VERSION(12, 0, 0):
	case IP_VERSION(12, 0, 1):
		if (!r)
			program_imu_rlc_ram(adev, data, (const u32)size);
		else
			program_imu_rlc_ram_old(adev, imu_rlc_ram_golden_12_0_1,
				(const u32)ARRAY_SIZE(imu_rlc_ram_golden_12_0_1));
		break;
	default:
		BUG();
		break;
	}

	//Indicate the latest entry
	WREG32_SOC15(GC, 0, regGFX_IMU_RLC_RAM_ADDR_HIGH, 0);
	WREG32_SOC15(GC, 0, regGFX_IMU_RLC_RAM_ADDR_LOW, 0);
	WREG32_SOC15(GC, 0, regGFX_IMU_RLC_RAM_DATA, 0);

	reg_data = RREG32_SOC15(GC, 0, regGFX_IMU_RLC_RAM_INDEX);
	reg_data |= GFX_IMU_RLC_RAM_INDEX__RAM_VALID_MASK;
	WREG32_SOC15(GC, 0, regGFX_IMU_RLC_RAM_INDEX, reg_data);
}

const struct amdgpu_imu_funcs gfx_v12_0_imu_funcs = {
	.init_microcode = imu_v12_0_init_microcode,
	.load_microcode = imu_v12_0_load_microcode,
	.setup_imu = imu_v12_0_setup,
	.start_imu = imu_v12_0_start,
	.program_rlc_ram = imu_v12_0_program_rlc_ram,
	.wait_for_reset_status = imu_v12_0_wait_for_reset_status,
};

Annotation

Implementation Notes