DM: crypto/fsl - Add Freescale rsa DM driver

Driver added for RSA Modular Exponentiation using Freescale Hardware
Accelerator CAAM. The driver uses UCLASS_MOD_EXP

Signed-off-by: Ruchika Gupta <ruchika.gupta@freescale.com>
CC: Simon Glass <sjg@chromium.org>
Acked-by: Simon Glass <sjg@chromium.org>

diff --git a/drivers/crypto/Kconfig b/drivers/crypto/Kconfig
index e69de29bb2d1d6434b8b29ae775ad8c2e48c5391..bd26a2bcfa286d9fd6b80b60cbd7ee9cc4c63ac8 100644 (file)
--- a/drivers/crypto/Kconfig
+++ b/drivers/crypto/Kconfig
@@ -0,0 +1 @@
+source drivers/crypto/fsl/Kconfig

diff --git a/drivers/crypto/fsl/Kconfig b/drivers/crypto/fsl/Kconfig
new file mode 100644 (file)
index 0000000..86b2f2f
--- /dev/null
+++ b/drivers/crypto/fsl/Kconfig
@@ -0,0 +1,6 @@
+config FSL_CAAM
+       bool "Freescale Crypto Driver Support"
+       help
+         Enables the Freescale's Cryptographic Accelerator and Assurance
+         Module (CAAM), also known as the SEC version 4 (SEC4). The driver uses
+         Job Ring as interface to communicate with CAAM.

diff --git a/drivers/crypto/fsl/Makefile b/drivers/crypto/fsl/Makefile
index 067d0a917ba6851f3d48ac7b428503d49252e994..c0cf64229ebe513688c6a85e61dac16689cdcb83 100644 (file)
--- a/drivers/crypto/fsl/Makefile
+++ b/drivers/crypto/fsl/Makefile
@@ -9,3 +9,4 @@
 obj-y += sec.o
 obj-$(CONFIG_FSL_CAAM) += jr.o fsl_hash.o jobdesc.o error.o
 obj-$(CONFIG_CMD_BLOB) += fsl_blob.o
+obj-$(CONFIG_RSA_FREESCALE_EXP) += fsl_rsa.o

diff --git a/drivers/crypto/fsl/fsl_rsa.c b/drivers/crypto/fsl/fsl_rsa.c
new file mode 100644 (file)
index 0000000..cf1c4c1
--- /dev/null
+++ b/drivers/crypto/fsl/fsl_rsa.c
@@ -0,0 +1,60 @@
+/*
+ * (C) Copyright 2014 Freescale Semiconductor, Inc.
+ * Author: Ruchika Gupta <ruchika.gupta@freescale.com>
+ *
+ * SPDX-License-Identifier:    GPL-2.0+
+ */
+
+#include <config.h>
+#include <common.h>
+#include <dm.h>
+#include <asm/types.h>
+#include <malloc.h>
+#include "jobdesc.h"
+#include "desc.h"
+#include "jr.h"
+#include "rsa_caam.h"
+#include <u-boot/rsa-mod-exp.h>
+
+int fsl_mod_exp(struct udevice *dev, const uint8_t *sig, uint32_t sig_len,
+               struct key_prop *prop, uint8_t *out)
+{
+       uint32_t keylen;
+       struct pk_in_params pkin;
+       uint32_t desc[MAX_CAAM_DESCSIZE];
+       int ret;
+
+       /* Length in bytes */
+       keylen = prop->num_bits / 8;
+
+       pkin.a = sig;
+       pkin.a_siz = sig_len;
+       pkin.n = prop->modulus;
+       pkin.n_siz = keylen;
+       pkin.e = prop->public_exponent;
+       pkin.e_siz = prop->exp_len;
+
+       inline_cnstr_jobdesc_pkha_rsaexp(desc, &pkin, out, sig_len);
+
+       ret = run_descriptor_jr(desc);
+       if (ret) {
+               debug("%s: RSA failed to verify: %d\n", __func__, ret);
+               return -EFAULT;
+       }
+
+       return 0;
+}
+
+static const struct mod_exp_ops fsl_mod_exp_ops = {
+       .mod_exp        = fsl_mod_exp,
+};
+
+U_BOOT_DRIVER(fsl_rsa_mod_exp) = {
+       .name   = "fsl_rsa_mod_exp",
+       .id     = UCLASS_MOD_EXP,
+       .ops    = &fsl_mod_exp_ops,
+};
+
+U_BOOT_DEVICE(fsl_rsa) = {
+       .name = "fsl_rsa_mod_exp",
+};

diff --git a/drivers/crypto/fsl/jobdesc.c b/drivers/crypto/fsl/jobdesc.c
index 1386baec0fda45a54e7d9664a92cef90d3c6e150..cc0dcede7b787ed19cd815a2b73a18a5334f75cb 100644 (file)
--- a/drivers/crypto/fsl/jobdesc.c
+++ b/drivers/crypto/fsl/jobdesc.c
@@ -11,6 +11,7 @@
 #include <common.h>
 #include "desc_constr.h"
 #include "jobdesc.h"
+#include "rsa_caam.h"
 
 #define KEY_BLOB_SIZE                  32
 #define MAC_SIZE                       16
@@ -123,3 +124,30 @@ void inline_cnstr_jobdesc_rng_instantiation(uint32_t *desc)
        append_operation(desc, OP_TYPE_CLASS1_ALG | OP_ALG_ALGSEL_RNG |
                         OP_ALG_RNG4_SK);
 }
+
+/* Change key size to bytes form bits in calling function*/
+void inline_cnstr_jobdesc_pkha_rsaexp(uint32_t *desc,
+                                     struct pk_in_params *pkin, uint8_t *out,
+                                     uint32_t out_siz)
+{
+       dma_addr_t dma_addr_e, dma_addr_a, dma_addr_n, dma_addr_out;
+
+       dma_addr_e = virt_to_phys((void *)pkin->e);
+       dma_addr_a = virt_to_phys((void *)pkin->a);
+       dma_addr_n = virt_to_phys((void *)pkin->n);
+       dma_addr_out = virt_to_phys((void *)out);
+
+       init_job_desc(desc, 0);
+       append_key(desc, dma_addr_e, pkin->e_siz, KEY_DEST_PKHA_E | CLASS_1);
+
+       append_fifo_load(desc, dma_addr_a,
+                        pkin->a_siz, LDST_CLASS_1_CCB | FIFOLD_TYPE_PK_A);
+
+       append_fifo_load(desc, dma_addr_n,
+                        pkin->n_siz, LDST_CLASS_1_CCB | FIFOLD_TYPE_PK_N);
+
+       append_operation(desc, OP_TYPE_PK | OP_ALG_PK | OP_ALG_PKMODE_MOD_EXPO);
+
+       append_fifo_store(desc, dma_addr_out, out_siz,
+                         LDST_CLASS_1_CCB | FIFOST_TYPE_PKHA_B);
+}

diff --git a/drivers/crypto/fsl/jobdesc.h b/drivers/crypto/fsl/jobdesc.h
index 3cf7226de23b7d47ebfa8d7f4aad2a4af9eb40e5..84b3edd6e2f9ab5ad4b49e1da105143fc654400e 100644 (file)
--- a/drivers/crypto/fsl/jobdesc.h
+++ b/drivers/crypto/fsl/jobdesc.h
@@ -10,6 +10,7 @@
 
 #include <common.h>
 #include <asm/io.h>
+#include "rsa_caam.h"
 
 #define KEY_IDNFR_SZ_BYTES             16
 
@@ -26,4 +27,8 @@ void inline_cnstr_jobdesc_blob_decap(uint32_t *desc, uint8_t *key_idnfr,
                                     uint32_t out_sz);
 
 void inline_cnstr_jobdesc_rng_instantiation(uint32_t *desc);
+
+void inline_cnstr_jobdesc_pkha_rsaexp(uint32_t *desc,
+                                     struct pk_in_params *pkin, uint8_t *out,
+                                     uint32_t out_siz);
 #endif

diff --git a/drivers/crypto/fsl/rsa_caam.h b/drivers/crypto/fsl/rsa_caam.h
new file mode 100644 (file)
index 0000000..4ff87ef
--- /dev/null
+++ b/drivers/crypto/fsl/rsa_caam.h
@@ -0,0 +1,28 @@
+/*
+ * Copyright 2014 Freescale Semiconductor, Inc.
+ *
+ * SPDX-License-Identifier:    GPL-2.0+
+ */
+
+#ifndef __RSA_CAAM_H
+#define __RSA_CAAM_H
+
+#include <common.h>
+
+/**
+ * struct pk_in_params - holder for input to PKHA block in CAAM
+ * These parameters are required to perform Modular Exponentiation
+ * using PKHA Block in CAAM
+ */
+struct pk_in_params {
+       const uint8_t *e;       /* public exponent as byte array */
+       uint32_t e_siz;         /* size of e[] in number of bytes */
+       const uint8_t *n;       /* modulus as byte array */
+       uint32_t n_siz;         /* size of n[] in number of bytes */
+       const uint8_t *a;               /* Signature as byte array */
+       uint32_t a_siz;         /* size of a[] in number of bytes */
+       uint8_t *b;             /* Result exp. modulus in number of bytes */
+       uint32_t b_siz;         /* size of b[] in number of bytes */
+};
+
+#endif