1 // SPDX-License-Identifier: GPL-2.0-only
5  * Copyright (c) 2014-2019, The Linux Foundation. All rights reserved.
12 #include "ufshcd-crypto.h"
13 #include "ufs-qcom.h"
54 /* BIST ("built-in self-test"?) status flags */
62 	writel((val), (host)->ice_mmio + (reg))
64 	readl((host)->ice_mmio + (reg))
68 	struct device *dev = host->hba->dev;  in qcom_ice_supported()
97 	struct ufs_hba *hba = host->hba;  in ufs_qcom_ice_init()
98 	struct device *dev = hba->dev;  in ufs_qcom_ice_init()
110 		goto disable;  in ufs_qcom_ice_init()
115 		goto disable;  in ufs_qcom_ice_init()
118 	host->ice_mmio = devm_ioremap_resource(dev, res);  in ufs_qcom_ice_init()
119 	if (IS_ERR(host->ice_mmio)) {  in ufs_qcom_ice_init()
120 		err = PTR_ERR(host->ice_mmio);  in ufs_qcom_ice_init()
126 		goto disable;  in ufs_qcom_ice_init()
130 disable:  in ufs_qcom_ice_init()
132 	hba->caps &= ~UFSHCD_CAP_CRYPTO;  in ufs_qcom_ice_init()
142 	 * Enable low power mode sequence  in qcom_ice_low_power_mode_enable()
143 	 * [0]-0, [1]-0, [2]-0, [3]-E, [4]-0, [5]-0, [6]-0, [7]-0  in qcom_ice_low_power_mode_enable()
164 	if (!(host->hba->caps & UFSHCD_CAP_CRYPTO))  in ufs_qcom_ice_enable()
184 		return -ETIMEDOUT;  in qcom_ice_wait_bist_status()
192 	if (!(host->hba->caps & UFSHCD_CAP_CRYPTO))  in ufs_qcom_ice_resume()
197 		dev_err(host->hba->dev, "BIST status error (%d)\n", err);  in ufs_qcom_ice_resume()
204  * Program a key into a QC ICE keyslot, or evict a keyslot.  QC ICE requires
205  * vendor-specific SCM calls for this; it doesn't support the standard way.
214 	} key;  in ufs_qcom_ice_program_key()  local
218 	if (!(cfg->config_enable & UFS_CRYPTO_CONFIGURATION_ENABLE))  in ufs_qcom_ice_program_key()
221 	/* Only AES-256-XTS has been tested so far. */  in ufs_qcom_ice_program_key()
222 	cap = hba->crypto_cap_array[cfg->crypto_cap_idx];  in ufs_qcom_ice_program_key()
225 		dev_err_ratelimited(hba->dev,  in ufs_qcom_ice_program_key()
228 		return -EINVAL;  in ufs_qcom_ice_program_key()
231 	memcpy(key.bytes, cfg->crypto_key, AES_256_XTS_KEY_SIZE);  in ufs_qcom_ice_program_key()
234 	 * The SCM call byte-swaps the 32-bit words of the key.  So we have to  in ufs_qcom_ice_program_key()
235 	 * do the same, in order for the final key be correct.  in ufs_qcom_ice_program_key()
237 	for (i = 0; i < ARRAY_SIZE(key.words); i++)  in ufs_qcom_ice_program_key()
238 		__cpu_to_be32s(&key.words[i]);  in ufs_qcom_ice_program_key()
240 	err = qcom_scm_ice_set_key(slot, key.bytes, AES_256_XTS_KEY_SIZE,  in ufs_qcom_ice_program_key()
242 				   cfg->data_unit_size);  in ufs_qcom_ice_program_key()
243 	memzero_explicit(&key, sizeof(key));  in ufs_qcom_ice_program_key()