nxp:driver for crypto h/w accelerator caam
NXP has hardware crypto accelerator called CAAM.
- Work with Job ring
- Jobs are submitted to CAAM in the form of 64 word
descriptor.
Signed-off-by: Ruchika Gupta <ruchika.gupta@nxp.com>
Signed-off-by: Pankaj Gupta <pankaj.gupta@nxp.com>
Change-Id: I02bcfce68143b8630e1833a74c4b126972f4323d
diff --git a/drivers/nxp/crypto/caam/src/jobdesc.c b/drivers/nxp/crypto/caam/src/jobdesc.c
new file mode 100644
index 0000000..9c235af
--- /dev/null
+++ b/drivers/nxp/crypto/caam/src/jobdesc.c
@@ -0,0 +1,236 @@
+/*
+ * Copyright 2017-2020 NXP
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
+ */
+
+#include <errno.h>
+#include <stdbool.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "caam.h"
+#include <common/debug.h>
+#include "jobdesc.h"
+#include "rsa.h"
+#include "sec_hw_specific.h"
+
+
+/* Return Length of desctiptr from first word */
+uint32_t desc_length(uint32_t *desc)
+{
+ return desc[0] & DESC_LEN_MASK;
+}
+
+/*Update start index in first word of descriptor */
+void desc_update_start_index(uint32_t *desc, uint32_t index)
+{
+ desc[0] |= (index << DESC_START_SHIFT);
+}
+
+/* Initialize the descriptor */
+void desc_init(uint32_t *desc)
+{
+ *desc = 0;
+}
+
+/* Add word in the descriptor and increment the length */
+void desc_add_word(uint32_t *desc, uint32_t word)
+{
+ uint32_t len = desc_length(desc);
+
+ /* Add Word at Last */
+ uint32_t *last = desc + len;
+ *last = word;
+
+ /* Increase the length */
+ desc[0] += 1;
+}
+
+/* Add Pointer to the descriptor */
+void desc_add_ptr(uint32_t *desc, phys_addr_t *ptr)
+{
+ uint32_t len = desc_length(desc);
+
+ /* Add Word at Last */
+ phys_addr_t *last = (phys_addr_t *) (desc + len);
+
+#ifdef CONFIG_PHYS_64BIT
+ ptr_addr_t *ptr_addr = (ptr_addr_t *) last;
+
+ ptr_addr->m_halves.high = PHYS_ADDR_HI(ptr);
+ ptr_addr->m_halves.low = PHYS_ADDR_LO(ptr);
+#else
+ *last = ptr;
+#endif
+
+ /* Increase the length */
+ desc[0] += (uint32_t) (sizeof(phys_addr_t) / sizeof(uint32_t));
+}
+
+/* Descriptor to generate Random words */
+int cnstr_rng_jobdesc(uint32_t *desc, uint32_t state_handle,
+ uint32_t *add_inp, uint32_t add_ip_len,
+ uint8_t *out_data, uint32_t len)
+{
+ phys_addr_t *phys_addr_out = vtop(out_data);
+
+ /* Current descriptor support only 64K length */
+ if (len > U(0xffff))
+ return -1;
+ /* Additional Input not supported by current descriptor */
+ if (add_ip_len > 0U)
+ return -1;
+
+ VERBOSE("Constructing descriptor\n");
+ desc_init(desc);
+ /* Class1 Alg Operation,RNG Optype, Generate */
+ desc_add_word(desc, U(0xb0800000));
+ desc_add_word(desc, U(0x82500000) | (state_handle << ALG_AAI_SH_SHIFT));
+ desc_add_word(desc, U(0x60340000) | len);
+ desc_add_ptr(desc, phys_addr_out);
+
+ return 0;
+
+}
+
+/* Construct descriptor to instantiate RNG */
+int cnstr_rng_instantiate_jobdesc(uint32_t *desc)
+{
+ desc_init(desc);
+ desc_add_word(desc, U(0xb0800000));
+ /* Class1 Alg Operation,RNG Optype, Instantiate */
+ desc_add_word(desc, U(0x82500004));
+ /* Wait for done */
+ desc_add_word(desc, U(0xa2000001));
+ /*Load to clear written */
+ desc_add_word(desc, U(0x10880004));
+ /*Pri Mode Reg clear */
+ desc_add_word(desc, U(0x00000001));
+ /* Generate secure keys */
+ desc_add_word(desc, U(0x82501000));
+
+ return 0;
+}
+
+/* Construct descriptor to generate hw key blob */
+int cnstr_hw_encap_blob_jobdesc(uint32_t *desc,
+ uint8_t *key_idnfr, uint32_t key_sz,
+ uint32_t key_class, uint8_t *plain_txt,
+ uint32_t in_sz, uint8_t *enc_blob,
+ uint32_t out_sz, uint32_t operation)
+{
+ phys_addr_t *phys_key_idnfr, *phys_addr_in, *phys_addr_out;
+ int i = 0;
+
+ phys_key_idnfr = vtop((void *)key_idnfr);
+ phys_addr_in = vtop((void *)plain_txt);
+ phys_addr_out = vtop((void *)enc_blob);
+
+ desc_init(desc);
+
+ desc_add_word(desc, U(0xb0800000));
+
+ /* Key Identifier */
+ desc_add_word(desc, (key_class | key_sz));
+ desc_add_ptr(desc, phys_key_idnfr);
+
+ /* Source Address */
+ desc_add_word(desc, U(0xf0400000));
+ desc_add_ptr(desc, phys_addr_in);
+
+ /* In Size = 0x10 */
+ desc_add_word(desc, in_sz);
+
+ /* Out Address */
+ desc_add_word(desc, U(0xf8400000));
+ desc_add_ptr(desc, phys_addr_out);
+
+ /* Out Size = 0x10 */
+ desc_add_word(desc, out_sz);
+
+ /* Operation */
+ desc_add_word(desc, operation);
+
+ for (i = 0; i < 15; i++)
+ VERBOSE("desc word %x\n", desc[i]);
+
+ return 0;
+}
+
+/***************************************************************************
+ * Function : inline_cnstr_jobdesc_pkha_rsaexp
+ * Arguments : desc - Pointer to Descriptor
+ * pkin - Pointer to Input Params
+ * out - Pointer to Output
+ * out_siz - Output Size
+ * Return : Void
+ * Description : Creates the descriptor for PKHA RSA
+ ***************************************************************************/
+void cnstr_jobdesc_pkha_rsaexp(uint32_t *desc,
+ struct pk_in_params *pkin, uint8_t *out,
+ uint32_t out_siz)
+{
+ phys_addr_t *ptr_addr_e, *ptr_addr_a, *ptr_addr_n, *ptr_addr_out;
+
+ ptr_addr_e = vtop((void *)(pkin->e));
+ ptr_addr_a = vtop((void *)(pkin->a));
+ ptr_addr_n = vtop((void *)(pkin->n));
+ ptr_addr_out = vtop((void *)(out));
+
+ desc_init(desc);
+ desc_add_word(desc, U(0xb0800000));
+ desc_add_word(desc, U(0x02010000) | pkin->e_siz);
+ desc_add_ptr(desc, ptr_addr_e);
+ desc_add_word(desc, U(0x220c0000) | pkin->a_siz);
+ desc_add_ptr(desc, ptr_addr_a);
+ desc_add_word(desc, U(0x22080000) | pkin->n_siz);
+ desc_add_ptr(desc, ptr_addr_n);
+ desc_add_word(desc, U(0x81800006));
+ desc_add_word(desc, U(0x620d0000) | out_siz);
+ desc_add_ptr(desc, ptr_addr_out);
+}
+
+/***************************************************************************
+ * Function : inline_cnstr_jobdesc_sha256
+ * Arguments : desc - Pointer to Descriptor
+ * msg - Pointer to SG Table
+ * msgsz - Size of SG Table
+ * digest - Pointer to Output Digest
+ * Return : Void
+ * Description : Creates the descriptor for SHA256 HASH calculation
+ ***************************************************************************/
+void cnstr_hash_jobdesc(uint32_t *desc, uint8_t *msg, uint32_t msgsz,
+ uint8_t *digest)
+{
+ /* SHA 256 , output is of length 32 words */
+ phys_addr_t *ptr_addr_in, *ptr_addr_out;
+
+ ptr_addr_in = (void *)vtop(msg);
+ ptr_addr_out = (void *)vtop(digest);
+
+ desc_init(desc);
+ desc_add_word(desc, U(0xb0800000));
+
+ /* Operation Command
+ * OP_TYPE_CLASS2_ALG | OP_ALG_ALGSEL_SHA256 | OP_ALG_AAI_HASH |
+ * OP_ALG_AS_INITFINAL | OP_ALG_ENCRYPT | OP_ALG_ICV_OFF)
+ */
+ desc_add_word(desc, U(0x8443000d));
+
+ if (msgsz > U(0xffff)) {
+ desc_add_word(desc, U(0x25540000)); /* FIFO Load */
+ desc_add_ptr(desc, ptr_addr_in); /* Pointer to msg */
+ desc_add_word(desc, msgsz); /* Size */
+ desc_add_word(desc, U(0x54200020)); /* FIFO Store */
+ desc_add_ptr(desc, ptr_addr_out); /* Pointer to Result */
+ } else {
+ desc_add_word(desc, U(0x25140000) | msgsz);
+ desc_add_ptr(desc, ptr_addr_in);
+ desc_add_word(desc, U(0x54200020));
+ desc_add_ptr(desc, ptr_addr_out);
+ }
+
+}