drivers/accel/habanalabs/common/decoder.c

File Facts

System

Linux kernel

Corpus path

drivers/accel/habanalabs/common/decoder.c

Extension

.c

Size

3693 bytes

Lines

142

Domain

Driver Families

Bucket

drivers/accel

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.

• 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.
• Allocates kernel memory; connect allocation flags and lifetime to context constraints.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• habanalabs.h

Detected Declarations

• function dec_print_abnrm_intr_source
• function dec_abnrm_intr_work
• function hl_dec_fini
• function hl_dec_init
• function hl_dec_ctx_fini

Annotated Snippet

if (!dec->base_addr) {
			dev_err(hdev->dev, "Invalid base address of decoder %d\n", j);
			rc = -EINVAL;
			goto err_dec_fini;
		}
	}

	return 0;

err_dec_fini:
	hl_dec_fini(hdev);

	return rc;
}

void hl_dec_ctx_fini(struct hl_ctx *ctx)
{
	struct hl_device *hdev = ctx->hdev;
	struct asic_fixed_properties *prop = &hdev->asic_prop;
	struct hl_dec *dec;
	int j;

	for (j = 0 ; j < prop->max_dec ; j++) {
		if (!!(prop->decoder_enabled_mask & BIT(j))) {
			dec = hdev->dec + j;
			/* Stop the decoder */
			WREG32(dec->base_addr + VCMD_CONTROL_OFFSET, 0);
		}
	}
}

Annotation

• Immediate include surface: `habanalabs.h`.
• Detected declarations: `function dec_print_abnrm_intr_source`, `function dec_abnrm_intr_work`, `function hl_dec_fini`, `function hl_dec_init`, `function hl_dec_ctx_fini`.
• Atlas domain: Driver Families / drivers/accel.
• Implementation status: source implementation candidate.

Implementation Notes

• This generated page is the file-by-file coverage layer; curated subsystem chapters should link here when they synthesize a multi-file control flow.
• Core OS pages should be promoted from atlas-only to deep-reviewed when they explain data structures, invariants, locking, lifecycle, and C implementation snippets.
• Driver-family pages are intentionally pattern-oriented unless they are part of the selected PCIe/NVMe representative device path.