drivers/mmc/host/cqhci-crypto.h

Source file repositories/reference/linux-study-clean/drivers/mmc/host/cqhci-crypto.h

File Facts

System
Linux kernel
Corpus path
drivers/mmc/host/cqhci-crypto.h
Extension
.h
Size
1047 bytes
Lines
51
Domain
Driver Families
Bucket
drivers/mmc
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

#ifndef LINUX_MMC_CQHCI_CRYPTO_H
#define LINUX_MMC_CQHCI_CRYPTO_H

#include <linux/mmc/host.h>

#include "cqhci.h"

#ifdef CONFIG_MMC_CRYPTO

int cqhci_crypto_init(struct cqhci_host *host);

/*
 * Returns the crypto bits that should be set in bits 64-127 of the
 * task descriptor.
 */
static inline u64 cqhci_crypto_prep_task_desc(struct mmc_request *mrq)
{
	if (!mrq->crypto_ctx)
		return 0;

	/* We set max_dun_bytes_supported=4, so all DUNs should be 32-bit. */
	WARN_ON_ONCE(mrq->crypto_ctx->bc_dun[0] > U32_MAX);

	return CQHCI_CRYPTO_ENABLE_BIT |
	       CQHCI_CRYPTO_KEYSLOT(mrq->crypto_key_slot) |
	       mrq->crypto_ctx->bc_dun[0];
}

#else /* CONFIG_MMC_CRYPTO */

static inline int cqhci_crypto_init(struct cqhci_host *host)
{
	return 0;
}

static inline u64 cqhci_crypto_prep_task_desc(struct mmc_request *mrq)
{
	return 0;
}

#endif /* !CONFIG_MMC_CRYPTO */

#endif /* LINUX_MMC_CQHCI_CRYPTO_H */

Annotation

Implementation Notes