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crypto: ccp - CCP versioning support

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Future hardware may introduce new algorithms wherein the
driver will need to manage resources for different versions
of the cryptographic coprocessor. This precursor patch
determines the version of the available device, and marks
and registers algorithms accordingly. A structure is added
which manages the version-specific data.

Signed-off-by: Gary R Hook <gary.hook@amd.com>
Acked-by: Tom Lendacky <thomas.lendacky@amd.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Gary R Hook
2016-03-01 13:49:15 -06:00
committed by Herbert Xu
parent 553d2374db
commit c7019c4d73
7 changed files with 115 additions and 5 deletions
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39
drivers/crypto/ccp/ccp-platform.c
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@@ -32,6 +32,33 @@ struct ccp_platform {
int coherent;
};
static const struct acpi_device_id ccp_acpi_match[];
static const struct of_device_id ccp_of_match[];
static struct ccp_vdata *ccp_get_of_version(struct platform_device *pdev)
{
#ifdef CONFIG_OF
const struct of_device_id *match;
match = of_match_node(ccp_of_match, pdev->dev.of_node);
if (match && match->data)
return (struct ccp_vdata *)match->data;
#endif
return 0;
}
static struct ccp_vdata *ccp_get_acpi_version(struct platform_device *pdev)
{
#ifdef CONFIG_ACPI
const struct acpi_device_id *match;
match = acpi_match_device(ccp_acpi_match, &pdev->dev);
if (match && match->driver_data)
return (struct ccp_vdata *)match->driver_data;
#endif
return 0;
}
static int ccp_get_irq(struct ccp_device *ccp)
{
struct device *dev = ccp->dev;
@@ -106,6 +133,13 @@ static int ccp_platform_probe(struct platform_device *pdev)
goto e_err;
ccp->dev_specific = ccp_platform;
ccp->vdata = pdev->dev.of_node ? ccp_get_of_version(pdev)
: ccp_get_acpi_version(pdev);
if (!ccp->vdata || !ccp->vdata->version) {
ret = -ENODEV;
dev_err(dev, "missing driver data\n");
goto e_err;
}
ccp->get_irq = ccp_get_irqs;
ccp->free_irq = ccp_free_irqs;
@@ -214,7 +248,7 @@ static int ccp_platform_resume(struct platform_device *pdev)
#ifdef CONFIG_ACPI
static const struct acpi_device_id ccp_acpi_match[] = {
{ "AMDI0C00", 0 },
{ "AMDI0C00", (kernel_ulong_t)&ccpv3 },
{ },
};
MODULE_DEVICE_TABLE(acpi, ccp_acpi_match);
@@ -222,7 +256,8 @@ MODULE_DEVICE_TABLE(acpi, ccp_acpi_match);
#ifdef CONFIG_OF
static const struct of_device_id ccp_of_match[] = {
{ .compatible = "amd,ccp-seattle-v1a" },
{ .compatible = "amd,ccp-seattle-v1a",
.data = (const void *)&ccpv3 },
{ },
};
MODULE_DEVICE_TABLE(of, ccp_of_match);