diff options
Diffstat (limited to 'drivers/s390/crypto/ap_asm.h')
| -rw-r--r-- | drivers/s390/crypto/ap_asm.h | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/drivers/s390/crypto/ap_asm.h b/drivers/s390/crypto/ap_asm.h index 6c0474c834d4..16b59ce5e01d 100644 --- a/drivers/s390/crypto/ap_asm.h +++ b/drivers/s390/crypto/ap_asm.h @@ -117,6 +117,49 @@ static inline int ap_qci(void *config) return reg1; } +/* + * union ap_qact_ap_info - used together with the + * ap_aqic() function to provide a convenient way + * to handle the ap info needed by the qact function. + */ +union ap_qact_ap_info { + unsigned long val; + struct { + unsigned int : 3; + unsigned int mode : 3; + unsigned int : 26; + unsigned int cat : 8; + unsigned int : 8; + unsigned char ver[2]; + }; +}; + +/** + * ap_qact(): Query AP combatibility type. + * @qid: The AP queue number + * @apinfo: On input the info about the AP queue. On output the + * alternate AP queue info provided by the qact function + * in GR2 is stored in. + * + * Returns AP queue status. Check response_code field for failures. + */ +static inline struct ap_queue_status ap_qact(ap_qid_t qid, int ifbit, + union ap_qact_ap_info *apinfo) +{ + register unsigned long reg0 asm ("0") = qid | (5UL << 24) + | ((ifbit & 0x01) << 22); + register unsigned long reg1_in asm ("1") = apinfo->val; + register struct ap_queue_status reg1_out asm ("1"); + register unsigned long reg2 asm ("2") = 0; + + asm volatile( + ".long 0xb2af0000" /* PQAP(QACT) */ + : "+d" (reg0), "+d" (reg1_in), "=d" (reg1_out), "+d" (reg2) + : : "cc"); + apinfo->val = reg2; + return reg1_out; +} + /** * ap_nqap(): Send message to adjunct processor queue. * @qid: The AP queue number |