drivers/crypto/ccp/sp-platform.c

Source file repositories/reference/linux-study-clean/drivers/crypto/ccp/sp-platform.c

File Facts

System
Linux kernel
Corpus path
drivers/crypto/ccp/sp-platform.c
Extension
.c
Size
4539 bytes
Lines
218
Domain
Driver Families
Bucket
drivers/crypto
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

struct sp_platform {
	int coherent;
	unsigned int irq_count;
};

static const struct sp_dev_vdata dev_vdata[] = {
	{
		.bar = 0,
#ifdef CONFIG_CRYPTO_DEV_SP_CCP
		.ccp_vdata = &ccpv3_platform,
#endif
	},
};

static const struct acpi_device_id sp_acpi_match[] = {
	{ "AMDI0C00", (kernel_ulong_t)&dev_vdata[0] },
	{ },
};
MODULE_DEVICE_TABLE(acpi, sp_acpi_match);

static const struct of_device_id sp_of_match[] = {
	{ .compatible = "amd,ccp-seattle-v1a",
	  .data = (const void *)&dev_vdata[0] },
	{ },
};
MODULE_DEVICE_TABLE(of, sp_of_match);

static const struct sp_dev_vdata *sp_get_acpi_version(struct platform_device *pdev)
{
	const struct acpi_device_id *match;

	match = acpi_match_device(sp_acpi_match, &pdev->dev);
	if (match && match->driver_data)
		return (const struct sp_dev_vdata *)match->driver_data;

	return NULL;
}

static int sp_get_irqs(struct sp_device *sp)
{
	struct sp_platform *sp_platform = sp->dev_specific;
	struct device *dev = sp->dev;
	struct platform_device *pdev = to_platform_device(dev);
	int ret;

	sp_platform->irq_count = platform_irq_count(pdev);

	ret = platform_get_irq(pdev, 0);
	if (ret < 0) {
		dev_notice(dev, "unable to get IRQ (%d)\n", ret);
		return ret;
	}

	sp->psp_irq = ret;
	if (sp_platform->irq_count == 1) {
		sp->ccp_irq = ret;
	} else {
		ret = platform_get_irq(pdev, 1);
		if (ret < 0) {
			dev_notice(dev, "unable to get IRQ (%d)\n", ret);
			return ret;
		}

		sp->ccp_irq = ret;
	}

	return 0;
}

static int sp_platform_probe(struct platform_device *pdev)
{
	struct sp_device *sp;
	struct sp_platform *sp_platform;
	struct device *dev = &pdev->dev;
	enum dev_dma_attr attr;
	int ret;

	ret = -ENOMEM;
	sp = sp_alloc_struct(dev);
	if (!sp)
		goto e_err;

	sp_platform = devm_kzalloc(dev, sizeof(*sp_platform), GFP_KERNEL);
	if (!sp_platform)
		goto e_err;

	sp->dev_specific = sp_platform;
	sp->dev_vdata = pdev->dev.of_node ? of_device_get_match_data(&pdev->dev)
					 : sp_get_acpi_version(pdev);
	if (!sp->dev_vdata) {

Annotation

Implementation Notes