[iot] Export eMMC RPMB interface for Secure Storage proxy

Secure Storage service in Trusty OS will compute
the encrypted mmc frame and the rpmb proxy inject the frame
to driver directly. So that need to export RPMB related
interface for Secure Storage proxy use.

Change-Id: I7f69831a20a440f597d323b610fa615fd4344d05
Signed-off-by: Haoran.Wang <elven.wang@nxp.com>

diff --git a/drivers/mmc/rpmb.c b/drivers/mmc/rpmb.c
index 1c6888f..1349ff5 100644 (file)
--- a/drivers/mmc/rpmb.c
+++ b/drivers/mmc/rpmb.c
@@ -40,12 +40,6 @@
 #define RPMB_ERR_CNT_EXPIRED   0x80
 #define RPMB_ERR_MSK           0x7
 
-/* Sizes of RPMB data frame */
-#define RPMB_SZ_STUFF          196
-#define RPMB_SZ_MAC            32
-#define RPMB_SZ_DATA           256
-#define RPMB_SZ_NONCE          16
-
 #define SHA256_BLOCK_SIZE      64
 
 /* Error messages */
@@ -61,18 +55,6 @@ static const char * const rpmb_err_msg[] = {
 };
 
 
-/* Structure of RPMB data frame. */
-struct s_rpmb {
-       unsigned char stuff[RPMB_SZ_STUFF];
-       unsigned char mac[RPMB_SZ_MAC];
-       unsigned char data[RPMB_SZ_DATA];
-       unsigned char nonce[RPMB_SZ_NONCE];
-       unsigned long write_counter;
-       unsigned short address;
-       unsigned short block_count;
-       unsigned short result;
-       unsigned short request;
-};
 
 static int mmc_set_blockcount(struct mmc *mmc, unsigned int blockcount,
                              bool is_rel_write)
@@ -87,7 +69,7 @@ static int mmc_set_blockcount(struct mmc *mmc, unsigned int blockcount,
 
        return mmc_send_cmd(mmc, &cmd, NULL);
 }
-static int mmc_rpmb_request(struct mmc *mmc, const struct s_rpmb *s,
+int mmc_rpmb_request(struct mmc *mmc, const struct s_rpmb *s,
                            unsigned int count, bool is_rel_write)
 {
        struct mmc_cmd cmd = {0};
@@ -107,7 +89,7 @@ static int mmc_rpmb_request(struct mmc *mmc, const struct s_rpmb *s,
        cmd.resp_type = MMC_RSP_R1b;
 
        data.src = (const char *)s;
-       data.blocks = 1;
+       data.blocks = count;
        data.blocksize = MMC_MAX_BLOCK_LEN;
        data.flags = MMC_DATA_WRITE;
 
@@ -120,14 +102,14 @@ static int mmc_rpmb_request(struct mmc *mmc, const struct s_rpmb *s,
        }
        return 0;
 }
-static int mmc_rpmb_response(struct mmc *mmc, struct s_rpmb *s,
-                            unsigned short expected)
+int mmc_rpmb_response(struct mmc *mmc, struct s_rpmb *s,
+                            unsigned int count, unsigned short expected)
 {
        struct mmc_cmd cmd = {0};
        struct mmc_data data;
        int ret;
 
-       ret = mmc_set_blockcount(mmc, 1, false);
+       ret = mmc_set_blockcount(mmc, count, false);
        if (ret) {
 #ifdef CONFIG_MMC_RPMB_TRACE
                printf("%s:mmc_set_blockcount-> %d\n", __func__, ret);
@@ -139,7 +121,7 @@ static int mmc_rpmb_response(struct mmc *mmc, struct s_rpmb *s,
        cmd.resp_type = MMC_RSP_R1;
 
        data.dest = (char *)s;
-       data.blocks = 1;
+       data.blocks = count;
        data.blocksize = MMC_MAX_BLOCK_LEN;
        data.flags = MMC_DATA_READ;
 
@@ -151,7 +133,7 @@ static int mmc_rpmb_response(struct mmc *mmc, struct s_rpmb *s,
                return -1;
        }
        /* Check the response and the status */
-       if (be16_to_cpu(s->request) != expected) {
+       if (expected && be16_to_cpu(s->request) != expected) {
 #ifdef CONFIG_MMC_RPMB_TRACE
                printf("%s:response= %x\n", __func__,
                       be16_to_cpu(s->request));
@@ -178,7 +160,7 @@ static int mmc_rpmb_status(struct mmc *mmc, unsigned short expected)
                return -1;
 
        /* Read the result */
-       return mmc_rpmb_response(mmc, rpmb_frame, expected);
+       return mmc_rpmb_response(mmc, rpmb_frame, 1, expected);
 }
 static void rpmb_hmac(unsigned char *key, unsigned char *buff, int len,
                      unsigned char *output)
@@ -236,7 +218,7 @@ int mmc_rpmb_get_counter(struct mmc *mmc, unsigned long *pcounter)
                return -1;
 
        /* Read the result */
-       ret = mmc_rpmb_response(mmc, rpmb_frame, RPMB_RESP_WCOUNTER);
+       ret = mmc_rpmb_response(mmc, rpmb_frame, 1, RPMB_RESP_WCOUNTER);
        if (ret)
                return ret;
 
@@ -272,7 +254,7 @@ int mmc_rpmb_read(struct mmc *mmc, void *addr, unsigned short blk,
                        break;
 
                /* Read the result */
-               if (mmc_rpmb_response(mmc, rpmb_frame, RPMB_RESP_READ_DATA))
+               if (mmc_rpmb_response(mmc, rpmb_frame, 1, RPMB_RESP_READ_DATA))
                        break;
 
                /* Check the HMAC if key is provided */

diff --git a/include/mmc.h b/include/mmc.h
index 18ae28b..75b8e71 100644 (file)
--- a/include/mmc.h
+++ b/include/mmc.h
@@ -676,12 +676,34 @@ int mmc_set_boot_bus_width(struct mmc *mmc, u8 width, u8 reset, u8 mode);
 /* Function to modify the RST_n_FUNCTION field of EXT_CSD */
 int mmc_set_rst_n_function(struct mmc *mmc, u8 enable);
 /* Functions to read / write the RPMB partition */
+/* Sizes of RPMB data frame */
+#define RPMB_SZ_STUFF          196
+#define RPMB_SZ_MAC            32
+#define RPMB_SZ_DATA           256
+#define RPMB_SZ_NONCE          16
+
+/* Structure of RPMB data frame. */
+struct s_rpmb {
+       unsigned char stuff[RPMB_SZ_STUFF];
+       unsigned char mac[RPMB_SZ_MAC];
+       unsigned char data[RPMB_SZ_DATA];
+       unsigned char nonce[RPMB_SZ_NONCE];
+       unsigned long write_counter;
+       unsigned short address;
+       unsigned short block_count;
+       unsigned short result;
+       unsigned short request;
+};
 int mmc_rpmb_set_key(struct mmc *mmc, void *key);
 int mmc_rpmb_get_counter(struct mmc *mmc, unsigned long *counter);
 int mmc_rpmb_read(struct mmc *mmc, void *addr, unsigned short blk,
                  unsigned short cnt, unsigned char *key);
 int mmc_rpmb_write(struct mmc *mmc, void *addr, unsigned short blk,
                   unsigned short cnt, unsigned char *key);
+int mmc_rpmb_request(struct mmc *mmc, const struct s_rpmb *s,
+                           unsigned int count, bool is_rel_write);
+int mmc_rpmb_response(struct mmc *mmc, struct s_rpmb *s,
+                            unsigned int count, unsigned short expected);
 #ifdef CONFIG_CMD_BKOPS_ENABLE
 int mmc_set_bkops_enable(struct mmc *mmc);
 #endif