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Commit 5f133c64 authored by Veerabhadrarao Badiganti's avatar Veerabhadrarao Badiganti
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mmc: sdhci-msm-ice: Changes for supporting ICE HCI in non CMDQ mode 



SDHC v5.0 onwards, SDHC includes the inline interface for
cryptographic operations which is ICE HCI.

This patch includes the driver changes for supporting crypto
operations with ICE HCI in noncq mode.

Change-Id: I3253b796212f63853cb3f6cf130f0a8542595428
Signed-off-by: default avatarVeerabhadrarao Badiganti <vbadigan@codeaurora.org>
parent 2df488a1

drivers/mmc/host/sdhci-msm-ice.c

+41 −1
Original line number Diff line number Diff line
@@ -292,7 +292,40 @@ void sdhci_msm_ice_hci_update_cmdq_cfg(u64 dun, unsigned int bypass, 
		*ice_ctx = DATA_UNIT_NUM(dun) |

			CRYPTO_CONFIG_INDEX(key_index) |

			CRYPTO_ENABLE(!bypass);

}



static

void sdhci_msm_ice_hci_update_noncq_cfg(struct sdhci_host *host,

		u64 dun, unsigned int bypass, short key_index)

{

	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);

	struct sdhci_msm_host *msm_host = pltfm_host->priv;

	unsigned int crypto_params = 0;

	/*

	 * The naming convention got changed between ICE2.0 and ICE3.0

	 * registers fields. Below is the equivalent names for

	 * ICE3.0 Vs ICE2.0:

	 *   Data Unit Number(DUN) == Logical Base address(LBA)

	 *   Crypto Configuration index (CCI) == Key Index

	 *   Crypto Enable (CE) == !BYPASS

	 */

	/* Configure ICE bypass mode */

	crypto_params |=

		(!bypass & MASK_SDHCI_MSM_ICE_HCI_PARAM_CE)

			<< OFFSET_SDHCI_MSM_ICE_HCI_PARAM_CE;

	/* Configure Crypto Configure Index (CCI) */

	crypto_params |= (key_index &

			 MASK_SDHCI_MSM_ICE_HCI_PARAM_CCI)

			 << OFFSET_SDHCI_MSM_ICE_HCI_PARAM_CCI;



	writel_relaxed((crypto_params & 0xFFFFFFFF),

		msm_host->cryptoio + ICE_NONCQ_CRYPTO_PARAMS);



	/* Update DUN */

	writel_relaxed((dun & 0xFFFFFFFF),

		msm_host->cryptoio + ICE_NONCQ_CRYPTO_DUN);

	/* Ensure ICE registers are configured before issuing SDHCI request */

	mb();

}



int sdhci_msm_ice_cfg(struct sdhci_host *host, struct mmc_request *mrq,
@@ -327,7 +360,14 @@ int sdhci_msm_ice_cfg(struct sdhci_host *host, struct mmc_request *mrq, 
				slot, bypass, key_index);

	}



	if (msm_host->ice_hci_support) {

		/* For ICE HCI / ICE3.0 */

		sdhci_msm_ice_hci_update_noncq_cfg(host, lba, bypass,

						key_index);

	} else {

		/* For ICE versions earlier to ICE3.0 */

		sdhci_msm_ice_update_cfg(host, lba, slot, bypass, key_index);

	}

	return 0;

}

drivers/mmc/host/sdhci-msm-ice.h

+8 −2
Original line number Diff line number Diff line
@@ -42,6 +42,8 @@ 
#define ICE_HCI_SUPPORT		(1 << 28)

#define ICE_CQ_CONFIG		0x08

#define CRYPTO_GENERAL_ENABLE	(1 << 1)

#define ICE_NONCQ_CRYPTO_PARAMS	0x70

#define ICE_NONCQ_CRYPTO_DUN	0x74



/* ICE3.0 register which got added hc reg space */

#define HC_VENDOR_SPECIFIC_FUNC4	0x260
@@ -52,8 +54,10 @@ 
/* SDHCI MSM ICE CTRL Info register offset */

enum {

	OFFSET_SDHCI_MSM_ICE_CTRL_INFO_BYPASS     = 0,

	OFFSET_SDHCI_MSM_ICE_CTRL_INFO_KEY_INDEX  = 0x1,

	OFFSET_SDHCI_MSM_ICE_CTRL_INFO_CDU        = 0x6,

	OFFSET_SDHCI_MSM_ICE_CTRL_INFO_KEY_INDEX  = 1,

	OFFSET_SDHCI_MSM_ICE_CTRL_INFO_CDU        = 6,

	OFFSET_SDHCI_MSM_ICE_HCI_PARAM_CCI	  = 0,

	OFFSET_SDHCI_MSM_ICE_HCI_PARAM_CE	  = 8,

};



/* SDHCI MSM ICE CTRL Info register masks */
@@ -61,6 +65,8 @@ enum { 
	MASK_SDHCI_MSM_ICE_CTRL_INFO_BYPASS     = 0x1,

	MASK_SDHCI_MSM_ICE_CTRL_INFO_KEY_INDEX  = 0x1F,

	MASK_SDHCI_MSM_ICE_CTRL_INFO_CDU        = 0x7,

	MASK_SDHCI_MSM_ICE_HCI_PARAM_CE		= 0x1,

	MASK_SDHCI_MSM_ICE_HCI_PARAM_CCI	= 0xff

};



/* SDHCI MSM ICE encryption/decryption bypass state */