From: Nikita Maslov <wkernelteam@xxxxxxxxx>
Use MMC_IOC_MULTI_CMD for RPMB access
On some systems which use MMC as a main storage device
it is possible that RPMB commands are mixed with
generic MMC access commands which invalidates RPMB.
This patch uses MMC_IOC_MULTI_CMD.
Signed-off-by: Clément Péron <peron.clem@xxxxxxxxx>
---
v3:
move set_single_cmd in mmc_cmds.c
add MMC_IOC_MULTI_CMD check
set blocks in set_single_cmd
fix frame_ptr used
mmc_cmds.c | 98 +++++++++++++++++++++++++++++-------------------------
1 file changed, 53 insertions(+), 45 deletions(-)
diff --git a/mmc_cmds.c b/mmc_cmds.c
index 44623fe..c8bfc09 100644
--- a/mmc_cmds.c
+++ b/mmc_cmds.c
@@ -1825,6 +1825,8 @@ int do_sanitize(int nargs, char **argv)
ret; \
})
+#define RMPB_MULTI_CMD_MAX_CMDS 3
+
enum rpmb_op_type {
MMC_RPMB_WRITE_KEY = 0x01,
MMC_RPMB_READ_CNT = 0x02,
@@ -1847,6 +1849,17 @@ struct rpmb_frame {
u_int16_t req_resp;
};
+static inline void set_single_cmd(struct mmc_ioc_cmd *ioc, __u32 opcode,
+ int write_flag)
+{
+ ioc->opcode = opcode;
+ ioc->write_flag = write_flag;
+ ioc->arg = 0x0;
+ ioc->blksz = 512;
+ ioc->blocks = 1;
+ ioc->flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC;
+}
+
/* Performs RPMB operation.
*
* @fd: RPMB device on which we should perform ioctl command
@@ -1861,22 +1874,27 @@ static int do_rpmb_op(int fd,
struct rpmb_frame *frame_out,
unsigned int out_cnt)
{
+#ifndef MMC_IOC_MULTI_CMD
+ fprintf(stderr, "mmc-utils has been compiled without MMC_IOC_MULTI_CMD"
+ " support, needed by RPMB operation.\n");
+ exit(1);
+#else
int err;
u_int16_t rpmb_type;
-
- struct mmc_ioc_cmd ioc = {
- .arg = 0x0,
- .blksz = 512,
- .blocks = 1,
- .write_flag = 1,
- .opcode = MMC_WRITE_MULTIPLE_BLOCK,
- .flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC,
- .data_ptr = (uintptr_t)frame_in
- };
+ struct mmc_ioc_multi_cmd *mioc;
+ struct mmc_ioc_cmd *ioc;
if (!frame_in || !frame_out || !out_cnt)
return -EINVAL;
+ /* prepare arguments for MMC_IOC_MUTLI_CMD ioctl */
+ mioc = (struct mmc_ioc_multi_cmd *)
+ malloc(sizeof (struct mmc_ioc_multi_cmd) +
+ RMPB_MULTI_CMD_MAX_CMDS * sizeof (struct mmc_ioc_cmd));
+ if (!mioc) {
+ return -ENOMEM;
+ }
+
rpmb_type = be16toh(frame_in->req_resp);
switch(rpmb_type) {
@@ -1887,33 +1905,24 @@ static int do_rpmb_op(int fd,
goto out;
}
+ mioc->num_of_cmds = 3;
+
/* Write request */
- ioc.write_flag |= (1<<31);
- err = ioctl(fd, MMC_IOC_CMD, &ioc);
- if (err < 0) {
- err = -errno;
- goto out;
- }
+ ioc = &mioc->cmds[0];
+ set_single_cmd(ioc, MMC_WRITE_MULTIPLE_BLOCK, (1 << 31) | 1);
+ mmc_ioc_cmd_set_data((*ioc), frame_in);
/* Result request */
+ ioc = &mioc->cmds[1];
memset(frame_out, 0, sizeof(*frame_out));
frame_out->req_resp = htobe16(MMC_RPMB_READ_RESP);
- ioc.write_flag = 1;
- ioc.data_ptr = (uintptr_t)frame_out;
- err = ioctl(fd, MMC_IOC_CMD, &ioc);
- if (err < 0) {
- err = -errno;
- goto out;
- }
+ set_single_cmd(ioc, MMC_WRITE_MULTIPLE_BLOCK, 1);
+ mmc_ioc_cmd_set_data((*ioc), frame_out);
/* Get response */
- ioc.write_flag = 0;
- ioc.opcode = MMC_READ_MULTIPLE_BLOCK;
- err = ioctl(fd, MMC_IOC_CMD, &ioc);
- if (err < 0) {
- err = -errno;
- goto out;
- }
+ ioc = &mioc->cmds[2];
+ set_single_cmd(ioc, MMC_READ_MULTIPLE_BLOCK, 0);
+ mmc_ioc_cmd_set_data((*ioc), frame_in);
break;
case MMC_RPMB_READ_CNT:
@@ -1924,23 +1933,18 @@ static int do_rpmb_op(int fd,
/* fall through */
case MMC_RPMB_READ:
- /* Request */
- err = ioctl(fd, MMC_IOC_CMD, &ioc);
- if (err < 0) {
- err = -errno;
- goto out;
- }
+ mioc->num_of_cmds = 2;
+
+ /* Read request */
+ ioc = &mioc->cmds[0];
+ set_single_cmd(ioc, MMC_WRITE_MULTIPLE_BLOCK, 1);
+ mmc_ioc_cmd_set_data((*ioc), frame_in);
/* Get response */
- ioc.write_flag = 0;
- ioc.opcode = MMC_READ_MULTIPLE_BLOCK;
- ioc.blocks = out_cnt;
- ioc.data_ptr = (uintptr_t)frame_out;
- err = ioctl(fd, MMC_IOC_CMD, &ioc);
- if (err < 0) {
- err = -errno;
- goto out;
- }
+ ioc = &mioc->cmds[1];
+ set_single_cmd(ioc, MMC_READ_MULTIPLE_BLOCK, 0);
+ ioc->blocks = out_cnt;
+ mmc_ioc_cmd_set_data((*ioc), frame_out);
break;
default:
@@ -1948,8 +1952,12 @@ static int do_rpmb_op(int fd,
goto out;
}
+ err = ioctl(fd, MMC_IOC_MULTI_CMD, mioc);
+
out:
+ free(mioc);
return err;
+#endif /* !MMC_IOC_MULTI_CMD */
}
int do_rpmb_write_key(int nargs, char **argv)
--
2.17.1
