drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gfx_v9.c

Source file repositories/reference/linux-study-clean/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gfx_v9.c

File Facts

System
Linux kernel
Corpus path
drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gfx_v9.c
Extension
.c
Size
39906 bytes
Lines
1265
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 (time_after(jiffies, end_jiffies)) {
			pr_err("SDMA RLC not idle in %s\n", __func__);
			return -ETIME;
		}
		usleep_range(500, 1000);
	}

	WREG32(sdma_rlc_reg_offset + mmSDMA0_RLC0_DOORBELL_OFFSET,
	       m->sdmax_rlcx_doorbell_offset);

	data = REG_SET_FIELD(m->sdmax_rlcx_doorbell, SDMA0_RLC0_DOORBELL,
			     ENABLE, 1);
	WREG32(sdma_rlc_reg_offset + mmSDMA0_RLC0_DOORBELL, data);
	WREG32(sdma_rlc_reg_offset + mmSDMA0_RLC0_RB_RPTR,
				m->sdmax_rlcx_rb_rptr);
	WREG32(sdma_rlc_reg_offset + mmSDMA0_RLC0_RB_RPTR_HI,
				m->sdmax_rlcx_rb_rptr_hi);

	WREG32(sdma_rlc_reg_offset + mmSDMA0_RLC0_MINOR_PTR_UPDATE, 1);
	if (read_user_wptr(mm, wptr64, data64)) {
		WREG32(sdma_rlc_reg_offset + mmSDMA0_RLC0_RB_WPTR,
		       lower_32_bits(data64));
		WREG32(sdma_rlc_reg_offset + mmSDMA0_RLC0_RB_WPTR_HI,
		       upper_32_bits(data64));
	} else {
		WREG32(sdma_rlc_reg_offset + mmSDMA0_RLC0_RB_WPTR,
		       m->sdmax_rlcx_rb_rptr);
		WREG32(sdma_rlc_reg_offset + mmSDMA0_RLC0_RB_WPTR_HI,
		       m->sdmax_rlcx_rb_rptr_hi);
	}
	WREG32(sdma_rlc_reg_offset + mmSDMA0_RLC0_MINOR_PTR_UPDATE, 0);

	WREG32(sdma_rlc_reg_offset + mmSDMA0_RLC0_RB_BASE, m->sdmax_rlcx_rb_base);
	WREG32(sdma_rlc_reg_offset + mmSDMA0_RLC0_RB_BASE_HI,
			m->sdmax_rlcx_rb_base_hi);
	WREG32(sdma_rlc_reg_offset + mmSDMA0_RLC0_RB_RPTR_ADDR_LO,
			m->sdmax_rlcx_rb_rptr_addr_lo);
	WREG32(sdma_rlc_reg_offset + mmSDMA0_RLC0_RB_RPTR_ADDR_HI,
			m->sdmax_rlcx_rb_rptr_addr_hi);

	data = REG_SET_FIELD(m->sdmax_rlcx_rb_cntl, SDMA0_RLC0_RB_CNTL,
			     RB_ENABLE, 1);
	WREG32(sdma_rlc_reg_offset + mmSDMA0_RLC0_RB_CNTL, data);

	return 0;
}

static int kgd_hqd_sdma_dump(struct amdgpu_device *adev,
			     uint32_t engine_id, uint32_t queue_id,
			     uint32_t (**dump)[2], uint32_t *n_regs)
{
	uint32_t sdma_rlc_reg_offset = get_sdma_rlc_reg_offset(adev,
			engine_id, queue_id);
	uint32_t i = 0, reg;
#undef HQD_N_REGS
#define HQD_N_REGS (19+6+7+10)

	*dump = kmalloc_objs(**dump, HQD_N_REGS);
	if (*dump == NULL)
		return -ENOMEM;

	for (reg = mmSDMA0_RLC0_RB_CNTL; reg <= mmSDMA0_RLC0_DOORBELL; reg++)
		DUMP_REG(sdma_rlc_reg_offset + reg);
	for (reg = mmSDMA0_RLC0_STATUS; reg <= mmSDMA0_RLC0_CSA_ADDR_HI; reg++)
		DUMP_REG(sdma_rlc_reg_offset + reg);
	for (reg = mmSDMA0_RLC0_IB_SUB_REMAIN;
	     reg <= mmSDMA0_RLC0_MINOR_PTR_UPDATE; reg++)
		DUMP_REG(sdma_rlc_reg_offset + reg);
	for (reg = mmSDMA0_RLC0_MIDCMD_DATA0;
	     reg <= mmSDMA0_RLC0_MIDCMD_CNTL; reg++)
		DUMP_REG(sdma_rlc_reg_offset + reg);

	WARN_ON_ONCE(i != HQD_N_REGS);
	*n_regs = i;

	return 0;
}

bool kgd_gfx_v9_hqd_is_occupied(struct amdgpu_device *adev,
				uint64_t queue_address, uint32_t pipe_id,
				uint32_t queue_id, uint32_t inst)
{
	uint32_t act;
	bool retval = false;
	uint32_t low, high;

	kgd_gfx_v9_acquire_queue(adev, pipe_id, queue_id, inst);
	act = RREG32_SOC15(GC, GET_INST(GC, inst), mmCP_HQD_ACTIVE);
	if (act) {
		low = lower_32_bits(queue_address >> 8);

Annotation

Implementation Notes