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@@ -10,6 +10,9 @@
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#include "jobdesc.h"
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#include "desc.h"
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#include "jr.h"
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+#include "fsl_hash.h"
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+#include <hw_sha.h>
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+#include <asm-generic/errno.h>
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#define CRYPTO_MAX_ALG_NAME 80
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#define SHA1_DIGEST_SIZE 20
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@@ -39,6 +42,122 @@ static struct caam_hash_template driver_hash[] = {
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},
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};
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+static enum caam_hash_algos get_hash_type(struct hash_algo *algo)
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+{
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+ if (!strcmp(algo->name, driver_hash[SHA1].name))
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+ return SHA1;
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+ else
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+ return SHA256;
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+}
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+
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+/* Create the context for progressive hashing using h/w acceleration.
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+ *
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+ * @ctxp: Pointer to the pointer of the context for hashing
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+ * @caam_algo: Enum for SHA1 or SHA256
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+ * @return 0 if ok, -ENOMEM on error
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+ */
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+static int caam_hash_init(void **ctxp, enum caam_hash_algos caam_algo)
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+{
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+ *ctxp = calloc(1, sizeof(struct sha_ctx));
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+ if (*ctxp == NULL) {
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+ debug("Cannot allocate memory for context\n");
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+ return -ENOMEM;
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+ }
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+ return 0;
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+}
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+
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+/*
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+ * Update sg table for progressive hashing using h/w acceleration
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+ *
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+ * The context is freed by this function if an error occurs.
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+ * We support at most 32 Scatter/Gather Entries.
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+ *
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+ * @hash_ctx: Pointer to the context for hashing
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+ * @buf: Pointer to the buffer being hashed
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+ * @size: Size of the buffer being hashed
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+ * @is_last: 1 if this is the last update; 0 otherwise
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+ * @caam_algo: Enum for SHA1 or SHA256
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+ * @return 0 if ok, -EINVAL on error
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+ */
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+static int caam_hash_update(void *hash_ctx, const void *buf,
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+ unsigned int size, int is_last,
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+ enum caam_hash_algos caam_algo)
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+{
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+ uint32_t final = 0;
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+ dma_addr_t addr = virt_to_phys((void *)buf);
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+ struct sha_ctx *ctx = hash_ctx;
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+
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+ if (ctx->sg_num >= MAX_SG_32) {
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+ free(ctx);
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+ return -EINVAL;
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+ }
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+
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+#ifdef CONFIG_PHYS_64BIT
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+ ctx->sg_tbl[ctx->sg_num].addr_hi = addr >> 32;
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+#else
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+ ctx->sg_tbl[ctx->sg_num].addr_hi = 0x0;
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+#endif
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+ ctx->sg_tbl[ctx->sg_num].addr_lo = addr;
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+
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+ sec_out32(&ctx->sg_tbl[ctx->sg_num].len_flag,
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+ (size & SG_ENTRY_LENGTH_MASK));
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+
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+ ctx->sg_num++;
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+
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+ if (is_last) {
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+ final = sec_in32(&ctx->sg_tbl[ctx->sg_num - 1].len_flag) |
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+ SG_ENTRY_FINAL_BIT;
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+ sec_out32(&ctx->sg_tbl[ctx->sg_num - 1].len_flag, final);
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+ }
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+
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+ return 0;
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+}
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+
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+/*
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+ * Perform progressive hashing on the given buffer and copy hash at
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+ * destination buffer
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+ *
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+ * The context is freed after completion of hash operation.
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+ *
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+ * @hash_ctx: Pointer to the context for hashing
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+ * @dest_buf: Pointer to the destination buffer where hash is to be copied
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+ * @size: Size of the buffer being hashed
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+ * @caam_algo: Enum for SHA1 or SHA256
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+ * @return 0 if ok, -EINVAL on error
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+ */
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+static int caam_hash_finish(void *hash_ctx, void *dest_buf,
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+ int size, enum caam_hash_algos caam_algo)
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+{
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+ uint32_t len = 0;
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+ struct sha_ctx *ctx = hash_ctx;
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+ int i = 0, ret = 0;
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+
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+ if (size < driver_hash[caam_algo].digestsize) {
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+ free(ctx);
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+ return -EINVAL;
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+ }
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+
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+ for (i = 0; i < ctx->sg_num; i++)
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+ len += (sec_in32(&ctx->sg_tbl[i].len_flag) &
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+ SG_ENTRY_LENGTH_MASK);
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+
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+ inline_cnstr_jobdesc_hash(ctx->sha_desc, (uint8_t *)ctx->sg_tbl, len,
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+ ctx->hash,
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+ driver_hash[caam_algo].alg_type,
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+ driver_hash[caam_algo].digestsize,
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+ 1);
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+
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+ ret = run_descriptor_jr(ctx->sha_desc);
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+
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+ if (ret)
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+ debug("Error %x\n", ret);
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+ else
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+ memcpy(dest_buf, ctx->hash, sizeof(ctx->hash));
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+
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+ free(ctx);
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+ return ret;
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+}
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+
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int caam_hash(const unsigned char *pbuf, unsigned int buf_len,
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unsigned char *pout, enum caam_hash_algos algo)
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{
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@@ -48,7 +167,7 @@ int caam_hash(const unsigned char *pbuf, unsigned int buf_len,
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desc = malloc(sizeof(int) * MAX_CAAM_DESCSIZE);
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if (!desc) {
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debug("Not enough memory for descriptor allocation\n");
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- return -1;
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+ return -ENOMEM;
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}
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inline_cnstr_jobdesc_hash(desc, pbuf, buf_len, pout,
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@@ -75,3 +194,20 @@ void hw_sha1(const unsigned char *pbuf, unsigned int buf_len,
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if (caam_hash(pbuf, buf_len, pout, SHA1))
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printf("CAAM was not setup properly or it is faulty\n");
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}
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+
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+int hw_sha_init(struct hash_algo *algo, void **ctxp)
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+{
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+ return caam_hash_init(ctxp, get_hash_type(algo));
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+}
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+
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+int hw_sha_update(struct hash_algo *algo, void *ctx, const void *buf,
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+ unsigned int size, int is_last)
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+{
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+ return caam_hash_update(ctx, buf, size, is_last, get_hash_type(algo));
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+}
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+
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+int hw_sha_finish(struct hash_algo *algo, void *ctx, void *dest_buf,
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+ int size)
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+{
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+ return caam_hash_finish(ctx, dest_buf, size, get_hash_type(algo));
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+}
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