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zkey: Add helper function to query the CCA firmware version

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Some future functions are dependent on the firmware version of the
CCA crypto adapter. This helper function allows to query the version
of the currently selected CCA adapter.

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
2019-08-05 16:27:21 +02:00
committed by Jan Höppner
parent b7bb90c552
commit b0cc0e4737
1 changed files with 52 additions and 0 deletions
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52
zkey/cca.c
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@@ -473,6 +473,58 @@ static int get_cca_adapter_serialnr(struct cca_lib *cca, char serialnr[9],
return 0;
}
/**
* Queries the firmware version of the current CCA adapter
*
* @param[in] cca the CCA library structure
* @param[out] version the struct where the version is returned
* @param[in] verbose if true, verbose messages are printed
*
* @returns 0 on success, a negative errno in case of an error.
*/
static int get_cca_adapter_version(struct cca_lib *cca,
struct cca_version *version,
bool verbose)
{
long exit_data_len = 0, rule_array_count, verb_data_length = 0;
unsigned char rule_array[6 * 8] = { 0, };
unsigned char exit_data[4] = { 0, };
long return_code, reason_code;
char version_data[9];
util_assert(cca != NULL, "Internal error: cca is NULL");
memset(rule_array, 0, sizeof(rule_array));
memcpy(rule_array, "STATCCA ", 8);
rule_array_count = 1;
cca->dll_CSUACFQ(&return_code, &reason_code,
&exit_data_len, exit_data,
&rule_array_count, rule_array,
&verb_data_length, NULL);
pr_verbose(verbose, "CSUACFQ (Cryptographic Facility Query) returned: "
"return_code: %ld, reason_code: %ld", return_code,
reason_code);
if (return_code != 0) {
print_CCA_error(return_code, reason_code);
return -EIO;
}
memcpy(version_data, rule_array+3*8, 8);
version_data[8] = '\0';
pr_verbose(verbose, "CCA firmware version string: %s", version_data);
if (sscanf((char *)version_data, "%u.%u.%uz", &version->ver,
&version->rel, &version->mod) != 3) {
warnx("CCA formware version is invalid: %s", version_data);
return -EINVAL;
}
return 0;
}
/**
* Selects the specified APQN to be used for the CCA host library.
*