kata-containers/s390-tools
1
0
Fork 0
mirror of https://github.com/ibm-s390-linux/s390-tools.git synced 2026-08-05 02:14:52 +00:00
Code Issues Packages Projects Releases Wiki Activity

zkey: Add support for reading the firmware version sysfs attribute

Browse Source 
EP11 cards provide the firmware version and API ordinal number as
a sysfs attribute on the crypto card level. Add a helper function
that obtains the firmware version and API ordinal number from there.

Signed-off-by: Ingo Franzki <ifranzki@linux.ibm.com>
Reviewed-by: Harald Freudenberger <freude@linux.ibm.com>
Signed-off-by: Jan Höppner <hoeppner@linux.ibm.com>
This commit is contained in:
Ingo Franzki
2019-11-19 14:39:26 +01:00
committed by Jan Höppner
parent 82c86fa8bd
commit 2ca442feed
2 changed files with 76 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

67
zkey/utils.c
View File

@@ -268,6 +268,73 @@ out:
return rc;
}
/**
* Gets the firmware version of an card from the sysfs.
* Currently only EP11 cards provide this information.
*
* @param[in] card card number
* @param[out] fw_version On return: The firmware version numbers
* @param[in] verbose if true, verbose messages are printed
*
* @returns 0 if the firmware version was returned. -ENODEV if the APQN is not
* available, or is not a CCA or EP11 card.
* -ENOTSUP if the fw_version sysfs attribute is not available, because
* the zcrypt kernel module is on an older level, or because the card
* type does not provide this information.
*/
int sysfs_get_firmware_version(int card, struct fw_version *fw_version,
bool verbose)
{
char *dev_path;
char buf[50];
int rc = 0;
if (fw_version == NULL)
return -EINVAL;
if (sysfs_is_card_online(card, CARD_TYPE_ANY) != 1)
return -ENODEV;
dev_path = util_path_sysfs("bus/ap/devices/card%02x", card);
if (!util_path_is_dir(dev_path)) {
rc = -ENODEV;
goto out;
}
if (util_file_read_line(buf, sizeof(buf), "%s/FW_version",
dev_path) != 0) {
rc = -ENOTSUP;
goto out;
}
if (sscanf(buf, "%d.%d", &fw_version->major, &fw_version->minor) != 2) {
rc = -ENODEV;
goto out;
}
if (util_file_read_line(buf, sizeof(buf), "%s/API_ordinalnr",
dev_path) != 0) {
rc = -ENOTSUP;
goto out;
}
if (sscanf(buf, "%d", &fw_version->api_ordinal) != 1) {
rc = -ENODEV;
goto out;
}
pr_verbose(verbose, "Firmware version of %02x: %d.%d (API: %d)", card,
fw_version->major, fw_version->minor,
fw_version->api_ordinal);
out:
if (rc != 0)
pr_verbose(verbose, "Failed to get firmware version for "
"%02x: %s", card, strerror(-rc));
free(dev_path);
return rc;
}
static int parse_mk_info(char *line, struct mk_info *mk_info)
{
struct mk_info_reg *mk_reg;

9
zkey/utils.h
View File

@@ -26,6 +26,15 @@ enum card_type sysfs_get_card_type(int card);
int sysfs_get_serialnr(int card, char serialnr[9], bool verbose);
struct fw_version {
unsigned int major;
unsigned int minor;
unsigned int api_ordinal;
};
int sysfs_get_firmware_version(int card, struct fw_version *fw_version,
bool verbose);
#define MK_STATE_EMPTY 0
#define MK_STATE_PARTIAL 1
#define MK_STATE_FULL 2