drivers/mmc/host/sdhci-msm-ice.c - kernel/msm-4.9 - Gitiles

 /*
  * Copyright (c) 2015, 2017, The Linux Foundation. All rights reserved.
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 2 and
  * only version 2 as published by the Free Software Foundation.
  *
  * This program is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
  */

 #include "sdhci-msm-ice.h"

 static void sdhci_msm_ice_error_cb(void *host_ctrl, u32 error)
 {
 	struct sdhci_msm_host *msm_host = (struct sdhci_msm_host *)host_ctrl;

 	dev_err(&msm_host->pdev->dev, "%s: Error in ice operation 0x%x",
 		__func__, error);

 	if (msm_host->ice.state == SDHCI_MSM_ICE_STATE_ACTIVE)
 		msm_host->ice.state = SDHCI_MSM_ICE_STATE_DISABLED;
 }

 static struct platform_device *sdhci_msm_ice_get_pdevice(struct device *dev)
 {
 	struct device_node *node;
 	struct platform_device *ice_pdev = NULL;

 	node = of_parse_phandle(dev->of_node, SDHC_MSM_CRYPTO_LABEL, 0);
 	if (!node) {
 		dev_dbg(dev, "%s: sdhc-msm-crypto property not specified\n",
 			__func__);
 		goto out;
 	}
 	ice_pdev = qcom_ice_get_pdevice(node);
 out:
 	return ice_pdev;
 }

 static
 struct qcom_ice_variant_ops *sdhci_msm_ice_get_vops(struct device *dev)
 {
 	struct qcom_ice_variant_ops *ice_vops = NULL;
 	struct device_node *node;

 	node = of_parse_phandle(dev->of_node, SDHC_MSM_CRYPTO_LABEL, 0);
 	if (!node) {
 		dev_dbg(dev, "%s: sdhc-msm-crypto property not specified\n",
 			__func__);
 		goto out;
 	}
 	ice_vops = qcom_ice_get_variant_ops(node);
 	of_node_put(node);
 out:
 	return ice_vops;
 }

 static
 void sdhci_msm_enable_ice_hci(struct sdhci_host *host, bool enable)
 {
 	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
 	struct sdhci_msm_host *msm_host = pltfm_host->priv;
 	u32 config = 0;
 	u32 ice_cap = 0;

 	/*
 	 * Enable the cryptographic support inside SDHC.
 	 * This is a global config which needs to be enabled
 	 * all the time.
 	 * Only when it it is enabled, the ICE_HCI capability
 	 * will get reflected in CQCAP register.
 	 */
 	config = readl_relaxed(host->ioaddr + HC_VENDOR_SPECIFIC_FUNC4);

 	if (enable)
 		config &= ~DISABLE_CRYPTO;
 	else
 		config |= DISABLE_CRYPTO;
 	writel_relaxed(config, host->ioaddr + HC_VENDOR_SPECIFIC_FUNC4);

 	/*
 	 * CQCAP register is in different register space from above
 	 * ice global enable register. So a mb() is required to ensure
 	 * above write gets completed before reading the CQCAP register.
 	 */
 	mb();

 	/*
 	 * Check if ICE HCI capability support is present
 	 * If present, enable it.
 	 */
 	ice_cap = readl_relaxed(msm_host->cryptoio + ICE_CQ_CAPABILITIES);
 	if (ice_cap & ICE_HCI_SUPPORT) {
 		config = readl_relaxed(msm_host->cryptoio + ICE_CQ_CONFIG);

 		if (enable)
 			config |= CRYPTO_GENERAL_ENABLE;
 		else
 			config &= ~CRYPTO_GENERAL_ENABLE;
 		writel_relaxed(config, msm_host->cryptoio + ICE_CQ_CONFIG);
 	}
 }

 int sdhci_msm_ice_get_dev(struct sdhci_host *host)
 {
 	struct device *sdhc_dev;
 	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
 	struct sdhci_msm_host *msm_host = pltfm_host->priv;

 	if (!msm_host || !msm_host->pdev) {
 		pr_err("%s: invalid msm_host %p or msm_host->pdev\n",
 			__func__, msm_host);
 		return -EINVAL;
 	}

 	sdhc_dev = &msm_host->pdev->dev;
 	msm_host->ice.vops  = sdhci_msm_ice_get_vops(sdhc_dev);
 	msm_host->ice.pdev = sdhci_msm_ice_get_pdevice(sdhc_dev);

 	if (msm_host->ice.pdev == ERR_PTR(-EPROBE_DEFER)) {
 		dev_err(sdhc_dev, "%s: ICE device not probed yet\n",
 			__func__);
 		msm_host->ice.pdev = NULL;
 		msm_host->ice.vops = NULL;
 		return -EPROBE_DEFER;
 	}

 	if (!msm_host->ice.pdev) {
 		dev_dbg(sdhc_dev, "%s: invalid platform device\n", __func__);
 		msm_host->ice.vops = NULL;
 		return -ENODEV;
 	}
 	if (!msm_host->ice.vops) {
 		dev_dbg(sdhc_dev, "%s: invalid ice vops\n", __func__);
 		msm_host->ice.pdev = NULL;
 		return -ENODEV;
 	}
 	msm_host->ice.state = SDHCI_MSM_ICE_STATE_DISABLED;
 	return 0;
 }

 static
 int sdhci_msm_ice_pltfm_init(struct sdhci_msm_host *msm_host)
 {
 	struct resource *ice_memres = NULL;
 	struct platform_device *pdev = msm_host->pdev;
 	int err = 0;

 	if (!msm_host->ice_hci_support)
 		goto out;
 	/*
 	 * ICE HCI registers are present in cmdq register space.
 	 * So map the cmdq mem for accessing ICE HCI registers.
 	 */
 	ice_memres = platform_get_resource_byname(pdev,
 						IORESOURCE_MEM, "cmdq_mem");
 	if (!ice_memres) {
 		dev_err(&pdev->dev, "Failed to get iomem resource for ice\n");
 		err = -EINVAL;
 		goto out;
 	}
 	msm_host->cryptoio = devm_ioremap(&pdev->dev,
 					ice_memres->start,
 					resource_size(ice_memres));
 	if (!msm_host->cryptoio) {
 		dev_err(&pdev->dev, "Failed to remap registers\n");
 		err = -ENOMEM;
 	}
 out:
 	return err;
 }

 int sdhci_msm_ice_init(struct sdhci_host *host)
 {
 	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
 	struct sdhci_msm_host *msm_host = pltfm_host->priv;
 	int err = 0;

 	if (msm_host->ice.vops->init) {
 		err = sdhci_msm_ice_pltfm_init(msm_host);
 		if (err)
 			goto out;

 		if (msm_host->ice_hci_support)
 			sdhci_msm_enable_ice_hci(host, true);

 		err = msm_host->ice.vops->init(msm_host->ice.pdev,
 					msm_host,
 					sdhci_msm_ice_error_cb);
 		if (err) {
 			pr_err("%s: ice init err %d\n",
 				mmc_hostname(host->mmc), err);
 			sdhci_msm_ice_print_regs(host);
 			if (msm_host->ice_hci_support)
 				sdhci_msm_enable_ice_hci(host, false);
 			goto out;
 		}
 		msm_host->ice.state = SDHCI_MSM_ICE_STATE_ACTIVE;
 	}

 out:
 	return err;
 }

 void sdhci_msm_ice_cfg_reset(struct sdhci_host *host, u32 slot)
 {
 	writel_relaxed(SDHCI_MSM_ICE_ENABLE_BYPASS,
 		host->ioaddr + CORE_VENDOR_SPEC_ICE_CTRL_INFO_3_n + 16 * slot);
 }

 static
 int sdhci_msm_ice_get_cfg(struct sdhci_msm_host *msm_host, struct request *req,
 			unsigned int *bypass, short *key_index)
 {
 	int err = 0;
 	struct ice_data_setting ice_set;

 	memset(&ice_set, 0, sizeof(struct ice_data_setting));
 	if (msm_host->ice.vops->config_start) {
 		err = msm_host->ice.vops->config_start(
 						msm_host->ice.pdev,
 						req, &ice_set, false);
 		if (err) {
 			pr_err("%s: ice config failed %d\n",
 					mmc_hostname(msm_host->mmc), err);
 			return err;
 		}
 	}
 	/* if writing data command */
 	if (rq_data_dir(req) == WRITE)
 		*bypass = ice_set.encr_bypass ?
 				SDHCI_MSM_ICE_ENABLE_BYPASS :
 				SDHCI_MSM_ICE_DISABLE_BYPASS;
 	/* if reading data command */
 	else if (rq_data_dir(req) == READ)
 		*bypass = ice_set.decr_bypass ?
 				SDHCI_MSM_ICE_ENABLE_BYPASS :
 				SDHCI_MSM_ICE_DISABLE_BYPASS;
 	*key_index = ice_set.crypto_data.key_index;
 	return err;
 }

 static
 void sdhci_msm_ice_update_cfg(struct sdhci_host *host, u64 lba,
 			u32 slot, unsigned int bypass, short key_index)
 {
 	unsigned int ctrl_info_val = 0;

 	/* Configure ICE index */
 	ctrl_info_val =
 		(key_index &
 		 MASK_SDHCI_MSM_ICE_CTRL_INFO_KEY_INDEX)
 		 << OFFSET_SDHCI_MSM_ICE_CTRL_INFO_KEY_INDEX;

 	/* Configure data unit size of transfer request */
 	ctrl_info_val |=
 		(SDHCI_MSM_ICE_TR_DATA_UNIT_512_B &
 		 MASK_SDHCI_MSM_ICE_CTRL_INFO_CDU)
 		 << OFFSET_SDHCI_MSM_ICE_CTRL_INFO_CDU;

 	/* Configure ICE bypass mode */
 	ctrl_info_val |=
 		(bypass & MASK_SDHCI_MSM_ICE_CTRL_INFO_BYPASS)
 		 << OFFSET_SDHCI_MSM_ICE_CTRL_INFO_BYPASS;

 	writel_relaxed((lba & 0xFFFFFFFF),
 		host->ioaddr + CORE_VENDOR_SPEC_ICE_CTRL_INFO_1_n + 16 * slot);
 	writel_relaxed(((lba >> 32) & 0xFFFFFFFF),
 		host->ioaddr + CORE_VENDOR_SPEC_ICE_CTRL_INFO_2_n + 16 * slot);
 	writel_relaxed(ctrl_info_val,
 		host->ioaddr + CORE_VENDOR_SPEC_ICE_CTRL_INFO_3_n + 16 * slot);
 	/* Ensure ICE registers are configured before issuing SDHCI request */
 	mb();
 }

 static inline
 void sdhci_msm_ice_hci_update_cmdq_cfg(u64 dun, unsigned int bypass,
 				short key_index, u64 *ice_ctx)
 {
 	/*
 	 * 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
 	 */
 	if (ice_ctx)
 		*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,
 			u32 slot)
 {
 	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
 	struct sdhci_msm_host *msm_host = pltfm_host->priv;
 	int err = 0;
 	short key_index = 0;
 	sector_t lba = 0;
 	unsigned int bypass = SDHCI_MSM_ICE_ENABLE_BYPASS;
 	struct request *req;

 	if (msm_host->ice.state != SDHCI_MSM_ICE_STATE_ACTIVE) {
 		pr_err("%s: ice is in invalid state %d\n",
 			mmc_hostname(host->mmc), msm_host->ice.state);
 		return -EINVAL;
 	}

 	WARN_ON(!mrq);
 	if (!mrq)
 		return -EINVAL;
 	req = mrq->req;
 	if (req) {
 		lba = req->__sector;
 		err = sdhci_msm_ice_get_cfg(msm_host, req, &bypass, &key_index);
 		if (err)
 			return err;
 		pr_debug("%s: %s: slot %d bypass %d key_index %d\n",
 				mmc_hostname(host->mmc),
 				(rq_data_dir(req) == WRITE) ? "WRITE" : "READ",
 				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;
 }

 int sdhci_msm_ice_cmdq_cfg(struct sdhci_host *host,
 			struct mmc_request *mrq, u32 slot, u64 *ice_ctx)
 {
 	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
 	struct sdhci_msm_host *msm_host = pltfm_host->priv;
 	int err = 0;
 	short key_index = 0;
 	sector_t lba = 0;
 	unsigned int bypass = SDHCI_MSM_ICE_ENABLE_BYPASS;
 	struct request *req;

 	if (msm_host->ice.state != SDHCI_MSM_ICE_STATE_ACTIVE) {
 		pr_err("%s: ice is in invalid state %d\n",
 			mmc_hostname(host->mmc), msm_host->ice.state);
 		return -EINVAL;
 	}

 	WARN_ON(!mrq);
 	if (!mrq)
 		return -EINVAL;
 	req = mrq->req;
 	if (req) {
 		lba = req->__sector;
 		err = sdhci_msm_ice_get_cfg(msm_host, req, &bypass, &key_index);
 		if (err)
 			return err;
 		pr_debug("%s: %s: slot %d bypass %d key_index %d\n",
 				mmc_hostname(host->mmc),
 				(rq_data_dir(req) == WRITE) ? "WRITE" : "READ",
 				slot, bypass, key_index);
 	}

 	if (msm_host->ice_hci_support) {
 		/* For ICE HCI / ICE3.0 */
 		sdhci_msm_ice_hci_update_cmdq_cfg(lba, bypass, key_index,
 						ice_ctx);
 	} else {
 		/* For ICE versions earlier to ICE3.0 */
 		sdhci_msm_ice_update_cfg(host, lba, slot, bypass, key_index);
 	}
 	return 0;
 }

 int sdhci_msm_ice_cfg_end(struct sdhci_host *host, struct mmc_request *mrq)
 {
 	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
 	struct sdhci_msm_host *msm_host = pltfm_host->priv;
 	int err = 0;
 	struct request *req;

 	if (!host->is_crypto_en)
 		return 0;

 	if (msm_host->ice.state != SDHCI_MSM_ICE_STATE_ACTIVE) {
 		pr_err("%s: ice is in invalid state %d\n",
 			mmc_hostname(host->mmc), msm_host->ice.state);
 		return -EINVAL;
 	}

 	req = mrq->req;
 	if (req) {
 		if (msm_host->ice.vops->config_end) {
 			err = msm_host->ice.vops->config_end(req);
 			if (err) {
 				pr_err("%s: ice config end failed %d\n",
 						mmc_hostname(host->mmc), err);
 				return err;
 			}
 		}
 	}

 	return 0;
 }

 int sdhci_msm_ice_reset(struct sdhci_host *host)
 {
 	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
 	struct sdhci_msm_host *msm_host = pltfm_host->priv;
 	int err = 0;

 	if (msm_host->ice.state != SDHCI_MSM_ICE_STATE_ACTIVE) {
 		pr_err("%s: ice is in invalid state before reset %d\n",
 			mmc_hostname(host->mmc), msm_host->ice.state);
 		return -EINVAL;
 	}

 	if (msm_host->ice.vops->reset) {
 		err = msm_host->ice.vops->reset(msm_host->ice.pdev);
 		if (err) {
 			pr_err("%s: ice reset failed %d\n",
 					mmc_hostname(host->mmc), err);
 			sdhci_msm_ice_print_regs(host);
 			return err;
 		}
 	}

 	/* If ICE HCI support is present then re-enable it */
 	if (msm_host->ice_hci_support)
 		sdhci_msm_enable_ice_hci(host, true);

 	if (msm_host->ice.state != SDHCI_MSM_ICE_STATE_ACTIVE) {
 		pr_err("%s: ice is in invalid state after reset %d\n",
 			mmc_hostname(host->mmc), msm_host->ice.state);
 		return -EINVAL;
 	}
 	return 0;
 }

 int sdhci_msm_ice_resume(struct sdhci_host *host)
 {
 	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
 	struct sdhci_msm_host *msm_host = pltfm_host->priv;
 	int err = 0;

 	if (msm_host->ice.state !=
 			SDHCI_MSM_ICE_STATE_SUSPENDED) {
 		pr_err("%s: ice is in invalid state before resume %d\n",
 			mmc_hostname(host->mmc), msm_host->ice.state);
 		return -EINVAL;
 	}

 	if (msm_host->ice.vops->resume) {
 		err = msm_host->ice.vops->resume(msm_host->ice.pdev);
 		if (err) {
 			pr_err("%s: ice resume failed %d\n",
 					mmc_hostname(host->mmc), err);
 			return err;
 		}
 	}

 	msm_host->ice.state = SDHCI_MSM_ICE_STATE_ACTIVE;
 	return 0;
 }

 int sdhci_msm_ice_suspend(struct sdhci_host *host)
 {
 	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
 	struct sdhci_msm_host *msm_host = pltfm_host->priv;
 	int err = 0;

 	if (msm_host->ice.state !=
 			SDHCI_MSM_ICE_STATE_ACTIVE) {
 		pr_err("%s: ice is in invalid state before resume %d\n",
 			mmc_hostname(host->mmc), msm_host->ice.state);
 		return -EINVAL;
 	}

 	if (msm_host->ice.vops->suspend) {
 		err = msm_host->ice.vops->suspend(msm_host->ice.pdev);
 		if (err) {
 			pr_err("%s: ice suspend failed %d\n",
 					mmc_hostname(host->mmc), err);
 			return -EINVAL;
 		}
 	}
 	msm_host->ice.state = SDHCI_MSM_ICE_STATE_SUSPENDED;
 	return 0;
 }

 int sdhci_msm_ice_get_status(struct sdhci_host *host, int *ice_status)
 {
 	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
 	struct sdhci_msm_host *msm_host = pltfm_host->priv;
 	int stat = -EINVAL;

 	if (msm_host->ice.state != SDHCI_MSM_ICE_STATE_ACTIVE) {
 		pr_err("%s: ice is in invalid state %d\n",
 			mmc_hostname(host->mmc), msm_host->ice.state);
 		return -EINVAL;
 	}

 	if (msm_host->ice.vops->status) {
 		*ice_status = 0;
 		stat = msm_host->ice.vops->status(msm_host->ice.pdev);
 		if (stat < 0) {
 			pr_err("%s: ice get sts failed %d\n",
 					mmc_hostname(host->mmc), stat);
 			return -EINVAL;
 		}
 		*ice_status = stat;
 	}
 	return 0;
 }

 void sdhci_msm_ice_print_regs(struct sdhci_host *host)
 {
 	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
 	struct sdhci_msm_host *msm_host = pltfm_host->priv;

 	if (msm_host->ice.vops->debug)
 		msm_host->ice.vops->debug(msm_host->ice.pdev);
 }
	/*
	* Copyright (c) 2015, 2017, The Linux Foundation. All rights reserved.
	*
	* This program is free software; you can redistribute it and/or modify
	* it under the terms of the GNU General Public License version 2 and
	* only version 2 as published by the Free Software Foundation.
	*
	* This program is distributed in the hope that it will be useful,
	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	* GNU General Public License for more details.
	*/

	#include "sdhci-msm-ice.h"

	static void sdhci_msm_ice_error_cb(void *host_ctrl, u32 error)
	{
	struct sdhci_msm_host msm_host = (struct sdhci_msm_host )host_ctrl;

	dev_err(&msm_host->pdev->dev, "%s: Error in ice operation 0x%x",
	__func__, error);

	if (msm_host->ice.state == SDHCI_MSM_ICE_STATE_ACTIVE)
	msm_host->ice.state = SDHCI_MSM_ICE_STATE_DISABLED;
	}

	static struct platform_device sdhci_msm_ice_get_pdevice(struct device dev)
	{
	struct device_node *node;
	struct platform_device *ice_pdev = NULL;

	node = of_parse_phandle(dev->of_node, SDHC_MSM_CRYPTO_LABEL, 0);
	if (!node) {
	dev_dbg(dev, "%s: sdhc-msm-crypto property not specified\n",
	__func__);
	goto out;
	}
	ice_pdev = qcom_ice_get_pdevice(node);
	out:
	return ice_pdev;
	}

	static
	struct qcom_ice_variant_ops sdhci_msm_ice_get_vops(struct device dev)
	{
	struct qcom_ice_variant_ops *ice_vops = NULL;
	struct device_node *node;

	node = of_parse_phandle(dev->of_node, SDHC_MSM_CRYPTO_LABEL, 0);
	if (!node) {
	dev_dbg(dev, "%s: sdhc-msm-crypto property not specified\n",
	__func__);
	goto out;
	}
	ice_vops = qcom_ice_get_variant_ops(node);
	of_node_put(node);
	out:
	return ice_vops;
	}

	static
	void sdhci_msm_enable_ice_hci(struct sdhci_host *host, bool enable)
	{
	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
	struct sdhci_msm_host *msm_host = pltfm_host->priv;
	u32 config = 0;
	u32 ice_cap = 0;

	/*
	* Enable the cryptographic support inside SDHC.
	* This is a global config which needs to be enabled
	* all the time.
	* Only when it it is enabled, the ICE_HCI capability
	* will get reflected in CQCAP register.
	*/
	config = readl_relaxed(host->ioaddr + HC_VENDOR_SPECIFIC_FUNC4);

	if (enable)
	config &= ~DISABLE_CRYPTO;
	else
	config \|= DISABLE_CRYPTO;
	writel_relaxed(config, host->ioaddr + HC_VENDOR_SPECIFIC_FUNC4);

	/*
	* CQCAP register is in different register space from above
	* ice global enable register. So a mb() is required to ensure
	* above write gets completed before reading the CQCAP register.
	*/
	mb();

	/*
	* Check if ICE HCI capability support is present
	* If present, enable it.
	*/
	ice_cap = readl_relaxed(msm_host->cryptoio + ICE_CQ_CAPABILITIES);
	if (ice_cap & ICE_HCI_SUPPORT) {
	config = readl_relaxed(msm_host->cryptoio + ICE_CQ_CONFIG);

	if (enable)
	config \|= CRYPTO_GENERAL_ENABLE;
	else
	config &= ~CRYPTO_GENERAL_ENABLE;
	writel_relaxed(config, msm_host->cryptoio + ICE_CQ_CONFIG);
	}
	}

	int sdhci_msm_ice_get_dev(struct sdhci_host *host)
	{
	struct device *sdhc_dev;
	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
	struct sdhci_msm_host *msm_host = pltfm_host->priv;

	if (!msm_host \|\| !msm_host->pdev) {
	pr_err("%s: invalid msm_host %p or msm_host->pdev\n",
	__func__, msm_host);
	return -EINVAL;
	}

	sdhc_dev = &msm_host->pdev->dev;
	msm_host->ice.vops = sdhci_msm_ice_get_vops(sdhc_dev);
	msm_host->ice.pdev = sdhci_msm_ice_get_pdevice(sdhc_dev);

	if (msm_host->ice.pdev == ERR_PTR(-EPROBE_DEFER)) {
	dev_err(sdhc_dev, "%s: ICE device not probed yet\n",
	__func__);
	msm_host->ice.pdev = NULL;
	msm_host->ice.vops = NULL;
	return -EPROBE_DEFER;
	}

	if (!msm_host->ice.pdev) {
	dev_dbg(sdhc_dev, "%s: invalid platform device\n", __func__);
	msm_host->ice.vops = NULL;
	return -ENODEV;
	}
	if (!msm_host->ice.vops) {
	dev_dbg(sdhc_dev, "%s: invalid ice vops\n", __func__);
	msm_host->ice.pdev = NULL;
	return -ENODEV;
	}
	msm_host->ice.state = SDHCI_MSM_ICE_STATE_DISABLED;
	return 0;
	}

	static
	int sdhci_msm_ice_pltfm_init(struct sdhci_msm_host *msm_host)
	{
	struct resource *ice_memres = NULL;
	struct platform_device *pdev = msm_host->pdev;
	int err = 0;

	if (!msm_host->ice_hci_support)
	goto out;
	/*
	* ICE HCI registers are present in cmdq register space.
	* So map the cmdq mem for accessing ICE HCI registers.
	*/
	ice_memres = platform_get_resource_byname(pdev,
	IORESOURCE_MEM, "cmdq_mem");
	if (!ice_memres) {
	dev_err(&pdev->dev, "Failed to get iomem resource for ice\n");
	err = -EINVAL;
	goto out;
	}
	msm_host->cryptoio = devm_ioremap(&pdev->dev,
	ice_memres->start,
	resource_size(ice_memres));
	if (!msm_host->cryptoio) {
	dev_err(&pdev->dev, "Failed to remap registers\n");
	err = -ENOMEM;
	}
	out:
	return err;
	}

	int sdhci_msm_ice_init(struct sdhci_host *host)
	{
	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
	struct sdhci_msm_host *msm_host = pltfm_host->priv;
	int err = 0;

	if (msm_host->ice.vops->init) {
	err = sdhci_msm_ice_pltfm_init(msm_host);
	if (err)
	goto out;

	if (msm_host->ice_hci_support)
	sdhci_msm_enable_ice_hci(host, true);

	err = msm_host->ice.vops->init(msm_host->ice.pdev,
	msm_host,
	sdhci_msm_ice_error_cb);
	if (err) {
	pr_err("%s: ice init err %d\n",
	mmc_hostname(host->mmc), err);
	sdhci_msm_ice_print_regs(host);
	if (msm_host->ice_hci_support)
	sdhci_msm_enable_ice_hci(host, false);
	goto out;
	}
	msm_host->ice.state = SDHCI_MSM_ICE_STATE_ACTIVE;
	}

	out:
	return err;
	}

	void sdhci_msm_ice_cfg_reset(struct sdhci_host *host, u32 slot)
	{
	writel_relaxed(SDHCI_MSM_ICE_ENABLE_BYPASS,
	host->ioaddr + CORE_VENDOR_SPEC_ICE_CTRL_INFO_3_n + 16 * slot);
	}

	static
	int sdhci_msm_ice_get_cfg(struct sdhci_msm_host msm_host, struct request req,
	unsigned int bypass, short key_index)
	{
	int err = 0;
	struct ice_data_setting ice_set;

	memset(&ice_set, 0, sizeof(struct ice_data_setting));
	if (msm_host->ice.vops->config_start) {
	err = msm_host->ice.vops->config_start(
	msm_host->ice.pdev,
	req, &ice_set, false);
	if (err) {
	pr_err("%s: ice config failed %d\n",
	mmc_hostname(msm_host->mmc), err);
	return err;
	}
	}
	/* if writing data command */
	if (rq_data_dir(req) == WRITE)
	*bypass = ice_set.encr_bypass ?
	SDHCI_MSM_ICE_ENABLE_BYPASS :
	SDHCI_MSM_ICE_DISABLE_BYPASS;
	/* if reading data command */
	else if (rq_data_dir(req) == READ)
	*bypass = ice_set.decr_bypass ?
	SDHCI_MSM_ICE_ENABLE_BYPASS :
	SDHCI_MSM_ICE_DISABLE_BYPASS;
	*key_index = ice_set.crypto_data.key_index;
	return err;
	}

	static
	void sdhci_msm_ice_update_cfg(struct sdhci_host *host, u64 lba,
	u32 slot, unsigned int bypass, short key_index)
	{
	unsigned int ctrl_info_val = 0;

	/* Configure ICE index */
	ctrl_info_val =
	(key_index &
	MASK_SDHCI_MSM_ICE_CTRL_INFO_KEY_INDEX)
	<< OFFSET_SDHCI_MSM_ICE_CTRL_INFO_KEY_INDEX;

	/* Configure data unit size of transfer request */
	ctrl_info_val \|=
	(SDHCI_MSM_ICE_TR_DATA_UNIT_512_B &
	MASK_SDHCI_MSM_ICE_CTRL_INFO_CDU)
	<< OFFSET_SDHCI_MSM_ICE_CTRL_INFO_CDU;

	/* Configure ICE bypass mode */
	ctrl_info_val \|=
	(bypass & MASK_SDHCI_MSM_ICE_CTRL_INFO_BYPASS)
	<< OFFSET_SDHCI_MSM_ICE_CTRL_INFO_BYPASS;

	writel_relaxed((lba & 0xFFFFFFFF),
	host->ioaddr + CORE_VENDOR_SPEC_ICE_CTRL_INFO_1_n + 16 * slot);
	writel_relaxed(((lba >> 32) & 0xFFFFFFFF),
	host->ioaddr + CORE_VENDOR_SPEC_ICE_CTRL_INFO_2_n + 16 * slot);
	writel_relaxed(ctrl_info_val,
	host->ioaddr + CORE_VENDOR_SPEC_ICE_CTRL_INFO_3_n + 16 * slot);
	/* Ensure ICE registers are configured before issuing SDHCI request */
	mb();
	}

	static inline
	void sdhci_msm_ice_hci_update_cmdq_cfg(u64 dun, unsigned int bypass,
	short key_index, u64 *ice_ctx)
	{
	/*
	* 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
	*/
	if (ice_ctx)
	*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,
	u32 slot)
	{
	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
	struct sdhci_msm_host *msm_host = pltfm_host->priv;
	int err = 0;
	short key_index = 0;
	sector_t lba = 0;
	unsigned int bypass = SDHCI_MSM_ICE_ENABLE_BYPASS;
	struct request *req;

	if (msm_host->ice.state != SDHCI_MSM_ICE_STATE_ACTIVE) {
	pr_err("%s: ice is in invalid state %d\n",
	mmc_hostname(host->mmc), msm_host->ice.state);
	return -EINVAL;
	}

	WARN_ON(!mrq);
	if (!mrq)
	return -EINVAL;
	req = mrq->req;
	if (req) {
	lba = req->__sector;
	err = sdhci_msm_ice_get_cfg(msm_host, req, &bypass, &key_index);
	if (err)
	return err;
	pr_debug("%s: %s: slot %d bypass %d key_index %d\n",
	mmc_hostname(host->mmc),
	(rq_data_dir(req) == WRITE) ? "WRITE" : "READ",
	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;
	}

	int sdhci_msm_ice_cmdq_cfg(struct sdhci_host *host,
	struct mmc_request mrq, u32 slot, u64 ice_ctx)
	{
	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
	struct sdhci_msm_host *msm_host = pltfm_host->priv;
	int err = 0;
	short key_index = 0;
	sector_t lba = 0;
	unsigned int bypass = SDHCI_MSM_ICE_ENABLE_BYPASS;
	struct request *req;

	if (msm_host->ice.state != SDHCI_MSM_ICE_STATE_ACTIVE) {
	pr_err("%s: ice is in invalid state %d\n",
	mmc_hostname(host->mmc), msm_host->ice.state);
	return -EINVAL;
	}

	WARN_ON(!mrq);
	if (!mrq)
	return -EINVAL;
	req = mrq->req;
	if (req) {
	lba = req->__sector;
	err = sdhci_msm_ice_get_cfg(msm_host, req, &bypass, &key_index);
	if (err)
	return err;
	pr_debug("%s: %s: slot %d bypass %d key_index %d\n",
	mmc_hostname(host->mmc),
	(rq_data_dir(req) == WRITE) ? "WRITE" : "READ",
	slot, bypass, key_index);
	}

	if (msm_host->ice_hci_support) {
	/* For ICE HCI / ICE3.0 */
	sdhci_msm_ice_hci_update_cmdq_cfg(lba, bypass, key_index,
	ice_ctx);
	} else {
	/* For ICE versions earlier to ICE3.0 */
	sdhci_msm_ice_update_cfg(host, lba, slot, bypass, key_index);
	}
	return 0;
	}

	int sdhci_msm_ice_cfg_end(struct sdhci_host host, struct mmc_request mrq)
	{
	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
	struct sdhci_msm_host *msm_host = pltfm_host->priv;
	int err = 0;
	struct request *req;

	if (!host->is_crypto_en)
	return 0;

	if (msm_host->ice.state != SDHCI_MSM_ICE_STATE_ACTIVE) {
	pr_err("%s: ice is in invalid state %d\n",
	mmc_hostname(host->mmc), msm_host->ice.state);
	return -EINVAL;
	}

	req = mrq->req;
	if (req) {
	if (msm_host->ice.vops->config_end) {
	err = msm_host->ice.vops->config_end(req);
	if (err) {
	pr_err("%s: ice config end failed %d\n",
	mmc_hostname(host->mmc), err);
	return err;
	}
	}
	}

	return 0;
	}

	int sdhci_msm_ice_reset(struct sdhci_host *host)
	{
	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
	struct sdhci_msm_host *msm_host = pltfm_host->priv;
	int err = 0;

	if (msm_host->ice.state != SDHCI_MSM_ICE_STATE_ACTIVE) {
	pr_err("%s: ice is in invalid state before reset %d\n",
	mmc_hostname(host->mmc), msm_host->ice.state);
	return -EINVAL;
	}

	if (msm_host->ice.vops->reset) {
	err = msm_host->ice.vops->reset(msm_host->ice.pdev);
	if (err) {
	pr_err("%s: ice reset failed %d\n",
	mmc_hostname(host->mmc), err);
	sdhci_msm_ice_print_regs(host);
	return err;
	}
	}

	/* If ICE HCI support is present then re-enable it */
	if (msm_host->ice_hci_support)
	sdhci_msm_enable_ice_hci(host, true);

	if (msm_host->ice.state != SDHCI_MSM_ICE_STATE_ACTIVE) {
	pr_err("%s: ice is in invalid state after reset %d\n",
	mmc_hostname(host->mmc), msm_host->ice.state);
	return -EINVAL;
	}
	return 0;
	}

	int sdhci_msm_ice_resume(struct sdhci_host *host)
	{
	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
	struct sdhci_msm_host *msm_host = pltfm_host->priv;
	int err = 0;

	if (msm_host->ice.state !=
	SDHCI_MSM_ICE_STATE_SUSPENDED) {
	pr_err("%s: ice is in invalid state before resume %d\n",
	mmc_hostname(host->mmc), msm_host->ice.state);
	return -EINVAL;
	}

	if (msm_host->ice.vops->resume) {
	err = msm_host->ice.vops->resume(msm_host->ice.pdev);
	if (err) {
	pr_err("%s: ice resume failed %d\n",
	mmc_hostname(host->mmc), err);
	return err;
	}
	}

	msm_host->ice.state = SDHCI_MSM_ICE_STATE_ACTIVE;
	return 0;
	}

	int sdhci_msm_ice_suspend(struct sdhci_host *host)
	{
	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
	struct sdhci_msm_host *msm_host = pltfm_host->priv;
	int err = 0;

	if (msm_host->ice.state !=
	SDHCI_MSM_ICE_STATE_ACTIVE) {
	pr_err("%s: ice is in invalid state before resume %d\n",
	mmc_hostname(host->mmc), msm_host->ice.state);
	return -EINVAL;
	}

	if (msm_host->ice.vops->suspend) {
	err = msm_host->ice.vops->suspend(msm_host->ice.pdev);
	if (err) {
	pr_err("%s: ice suspend failed %d\n",
	mmc_hostname(host->mmc), err);
	return -EINVAL;
	}
	}
	msm_host->ice.state = SDHCI_MSM_ICE_STATE_SUSPENDED;
	return 0;
	}

	int sdhci_msm_ice_get_status(struct sdhci_host host, int ice_status)
	{
	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
	struct sdhci_msm_host *msm_host = pltfm_host->priv;
	int stat = -EINVAL;

	if (msm_host->ice.state != SDHCI_MSM_ICE_STATE_ACTIVE) {
	pr_err("%s: ice is in invalid state %d\n",
	mmc_hostname(host->mmc), msm_host->ice.state);
	return -EINVAL;
	}

	if (msm_host->ice.vops->status) {
	*ice_status = 0;
	stat = msm_host->ice.vops->status(msm_host->ice.pdev);
	if (stat < 0) {
	pr_err("%s: ice get sts failed %d\n",
	mmc_hostname(host->mmc), stat);
	return -EINVAL;
	}
	*ice_status = stat;
	}
	return 0;
	}

	void sdhci_msm_ice_print_regs(struct sdhci_host *host)
	{
	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
	struct sdhci_msm_host *msm_host = pltfm_host->priv;

	if (msm_host->ice.vops->debug)
	msm_host->ice.vops->debug(msm_host->ice.pdev);
	}