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

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

File Facts

System
Linux kernel
Corpus path
drivers/gpu/drm/amd/amdgpu/amdgpu_vcn.c
Extension
.c
Size
45368 bytes
Lines
1635
Domain
Driver Families
Bucket
drivers/gpu
Inferred role
Driver Families: operation-table or driver-model contract
Status
pattern 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

static const struct file_operations amdgpu_debugfs_vcnfwlog_fops = {
	.owner = THIS_MODULE,
	.read = amdgpu_debugfs_vcn_fwlog_read,
	.llseek = default_llseek
};
#endif

void amdgpu_debugfs_vcn_fwlog_init(struct amdgpu_device *adev, uint8_t i,
				   struct amdgpu_vcn_inst *vcn)
{
#if defined(CONFIG_DEBUG_FS)
	struct drm_minor *minor = adev_to_drm(adev)->primary;
	struct dentry *root = minor->debugfs_root;
	char name[32];

	sprintf(name, "amdgpu_vcn_%d_fwlog", i);
	debugfs_create_file_size(name, S_IFREG | 0444, root, vcn,
				 &amdgpu_debugfs_vcnfwlog_fops,
				 AMDGPU_VCNFW_LOG_SIZE);
#endif
}

void amdgpu_vcn_fwlog_init(struct amdgpu_vcn_inst *vcn)
{
#if defined(CONFIG_DEBUG_FS)
	uint32_t *flag = vcn->fw_shared.cpu_addr;
	void *fw_log_cpu_addr = vcn->fw_shared.cpu_addr + vcn->fw_shared.mem_size;
	uint64_t fw_log_gpu_addr = vcn->fw_shared.gpu_addr + vcn->fw_shared.mem_size;
	struct amdgpu_vcn_fwlog *log_buf = fw_log_cpu_addr;
	struct amdgpu_fw_shared_fw_logging *fw_log = vcn->fw_shared.cpu_addr
							 + vcn->fw_shared.log_offset;
	*flag |= cpu_to_le32(AMDGPU_VCN_FW_LOGGING_FLAG);
	fw_log->is_enabled = 1;
	fw_log->addr_lo = cpu_to_le32(fw_log_gpu_addr & 0xFFFFFFFF);
	fw_log->addr_hi = cpu_to_le32(fw_log_gpu_addr >> 32);
	fw_log->size = cpu_to_le32(AMDGPU_VCNFW_LOG_SIZE);

	log_buf->header_size = sizeof(struct amdgpu_vcn_fwlog);
	log_buf->buffer_size = AMDGPU_VCNFW_LOG_SIZE;
	log_buf->rptr = log_buf->header_size;
	log_buf->wptr = log_buf->header_size;
	log_buf->wrapped = 0;
#endif
}

int amdgpu_vcn_process_poison_irq(struct amdgpu_device *adev,
				struct amdgpu_irq_src *source,
				struct amdgpu_iv_entry *entry)
{
	struct ras_common_if *ras_if = adev->vcn.ras_if;
	struct ras_dispatch_if ih_data = {
		.entry = entry,
	};

	if (!ras_if)
		return 0;

	if (!amdgpu_sriov_vf(adev)) {
		ih_data.head = *ras_if;
		amdgpu_ras_interrupt_dispatch(adev, &ih_data);
	} else {
		if (adev->virt.ops && adev->virt.ops->ras_poison_handler)
			adev->virt.ops->ras_poison_handler(adev, ras_if->block);
		else
			dev_warn(adev->dev,
				"No ras_poison_handler interface in SRIOV for VCN!\n");
	}

	return 0;
}

int amdgpu_vcn_ras_late_init(struct amdgpu_device *adev, struct ras_common_if *ras_block)
{
	int r, i;

	r = amdgpu_ras_block_late_init(adev, ras_block);
	if (r)
		return r;

	if (amdgpu_ras_is_supported(adev, ras_block->block)) {
		for (i = 0; i < adev->vcn.num_vcn_inst; i++) {
			if (adev->vcn.harvest_config & (1 << i) ||
			    !adev->vcn.inst[i].ras_poison_irq.funcs)
				continue;

			r = amdgpu_irq_get(adev, &adev->vcn.inst[i].ras_poison_irq, 0);
			if (r)
				goto late_fini;
		}
	}

Annotation

Implementation Notes