diff options
author | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2016-09-21 12:48:54 +0200 |
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committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2016-12-14 16:33:38 +0100 |
commit | 0db78559f965a2e652dbe8acf35333f2081bf872 (patch) | |
tree | 7e7fbcb64807bf69f67a332f061f0f2cc7d3a587 /drivers/s390/crypto | |
parent | 236fb2ab95e9832880501d465d64eb2f2935b852 (diff) | |
download | op-kernel-dev-0db78559f965a2e652dbe8acf35333f2081bf872.zip op-kernel-dev-0db78559f965a2e652dbe8acf35333f2081bf872.tar.gz |
s390/zcrypt: header for the AP inline assmblies
Move the inline assemblies for the AP bus into a separate header file.
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'drivers/s390/crypto')
-rw-r--r-- | drivers/s390/crypto/ap_asm.h | 191 | ||||
-rw-r--r-- | drivers/s390/crypto/ap_bus.c | 188 |
2 files changed, 204 insertions, 175 deletions
diff --git a/drivers/s390/crypto/ap_asm.h b/drivers/s390/crypto/ap_asm.h new file mode 100644 index 0000000..12fffdd --- /dev/null +++ b/drivers/s390/crypto/ap_asm.h @@ -0,0 +1,191 @@ +/* + * Copyright IBM Corp. 2016 + * Author(s): Martin Schwidefsky <schwidefsky@de.ibm.com> + * + * Adjunct processor bus inline assemblies. + */ + +#ifndef _AP_ASM_H_ +#define _AP_ASM_H_ + +#include <asm/isc.h> + +/** + * ap_intructions_available() - Test if AP instructions are available. + * + * Returns 0 if the AP instructions are installed. + */ +static inline int ap_instructions_available(void) +{ + register unsigned long reg0 asm ("0") = AP_MKQID(0, 0); + register unsigned long reg1 asm ("1") = -ENODEV; + register unsigned long reg2 asm ("2") = 0UL; + + asm volatile( + " .long 0xb2af0000\n" /* PQAP(TAPQ) */ + "0: la %1,0\n" + "1:\n" + EX_TABLE(0b, 1b) + : "+d" (reg0), "+d" (reg1), "+d" (reg2) : : "cc"); + return reg1; +} + +/** + * ap_tapq(): Test adjunct processor queue. + * @qid: The AP queue number + * @info: Pointer to queue descriptor + * + * Returns AP queue status structure. + */ +static inline struct ap_queue_status ap_tapq(ap_qid_t qid, unsigned long *info) +{ + register unsigned long reg0 asm ("0") = qid; + register struct ap_queue_status reg1 asm ("1"); + register unsigned long reg2 asm ("2") = 0UL; + + asm volatile(".long 0xb2af0000" /* PQAP(TAPQ) */ + : "+d" (reg0), "=d" (reg1), "+d" (reg2) : : "cc"); + if (info) + *info = reg2; + return reg1; +} + +/** + * ap_pqap_rapq(): Reset adjunct processor queue. + * @qid: The AP queue number + * + * Returns AP queue status structure. + */ +static inline struct ap_queue_status ap_rapq(ap_qid_t qid) +{ + register unsigned long reg0 asm ("0") = qid | 0x01000000UL; + register struct ap_queue_status reg1 asm ("1"); + register unsigned long reg2 asm ("2") = 0UL; + + asm volatile( + ".long 0xb2af0000" /* PQAP(RAPQ) */ + : "+d" (reg0), "=d" (reg1), "+d" (reg2) : : "cc"); + return reg1; +} + +/** + * ap_aqic(): Enable interruption for a specific AP. + * @qid: The AP queue number + * @ind: The notification indicator byte + * + * Returns AP queue status. + */ +static inline struct ap_queue_status ap_aqic(ap_qid_t qid, void *ind) +{ + register unsigned long reg0 asm ("0") = qid | (3UL << 24); + register unsigned long reg1_in asm ("1") = (8UL << 44) | AP_ISC; + register struct ap_queue_status reg1_out asm ("1"); + register void *reg2 asm ("2") = ind; + + asm volatile( + ".long 0xb2af0000" /* PQAP(AQIC) */ + : "+d" (reg0), "+d" (reg1_in), "=d" (reg1_out), "+d" (reg2) + : + : "cc"); + return reg1_out; +} + +/** + * ap_qci(): Get AP configuration data + * + * Returns 0 on success, or -EOPNOTSUPP. + */ +static inline int ap_qci(void *config) +{ + register unsigned long reg0 asm ("0") = 0x04000000UL; + register unsigned long reg1 asm ("1") = -EINVAL; + register void *reg2 asm ("2") = (void *) config; + + asm volatile( + ".long 0xb2af0000\n" /* PQAP(QCI) */ + "0: la %1,0\n" + "1:\n" + EX_TABLE(0b, 1b) + : "+d" (reg0), "+d" (reg1), "+d" (reg2) + : + : "cc"); + + return reg1; +} + +/** + * ap_nqap(): Send message to adjunct processor queue. + * @qid: The AP queue number + * @psmid: The program supplied message identifier + * @msg: The message text + * @length: The message length + * + * Returns AP queue status structure. + * Condition code 1 on NQAP can't happen because the L bit is 1. + * Condition code 2 on NQAP also means the send is incomplete, + * because a segment boundary was reached. The NQAP is repeated. + */ +static inline struct ap_queue_status ap_nqap(ap_qid_t qid, + unsigned long long psmid, + void *msg, size_t length) +{ + struct msgblock { char _[length]; }; + register unsigned long reg0 asm ("0") = qid | 0x40000000UL; + register struct ap_queue_status reg1 asm ("1"); + register unsigned long reg2 asm ("2") = (unsigned long) msg; + register unsigned long reg3 asm ("3") = (unsigned long) length; + register unsigned long reg4 asm ("4") = (unsigned int) (psmid >> 32); + register unsigned long reg5 asm ("5") = psmid & 0xffffffff; + + asm volatile ( + "0: .long 0xb2ad0042\n" /* NQAP */ + " brc 2,0b" + : "+d" (reg0), "=d" (reg1), "+d" (reg2), "+d" (reg3) + : "d" (reg4), "d" (reg5), "m" (*(struct msgblock *) msg) + : "cc"); + return reg1; +} + +/** + * ap_dqap(): Receive message from adjunct processor queue. + * @qid: The AP queue number + * @psmid: Pointer to program supplied message identifier + * @msg: The message text + * @length: The message length + * + * Returns AP queue status structure. + * Condition code 1 on DQAP means the receive has taken place + * but only partially. The response is incomplete, hence the + * DQAP is repeated. + * Condition code 2 on DQAP also means the receive is incomplete, + * this time because a segment boundary was reached. Again, the + * DQAP is repeated. + * Note that gpr2 is used by the DQAP instruction to keep track of + * any 'residual' length, in case the instruction gets interrupted. + * Hence it gets zeroed before the instruction. + */ +static inline struct ap_queue_status ap_dqap(ap_qid_t qid, + unsigned long long *psmid, + void *msg, size_t length) +{ + struct msgblock { char _[length]; }; + register unsigned long reg0 asm("0") = qid | 0x80000000UL; + register struct ap_queue_status reg1 asm ("1"); + register unsigned long reg2 asm("2") = 0UL; + register unsigned long reg4 asm("4") = (unsigned long) msg; + register unsigned long reg5 asm("5") = (unsigned long) length; + register unsigned long reg6 asm("6") = 0UL; + register unsigned long reg7 asm("7") = 0UL; + + + asm volatile( + "0: .long 0xb2ae0064\n" /* DQAP */ + " brc 6,0b\n" + : "+d" (reg0), "=d" (reg1), "+d" (reg2), + "+d" (reg4), "+d" (reg5), "+d" (reg6), "+d" (reg7), + "=m" (*(struct msgblock *) msg) : : "cc"); + *psmid = (((unsigned long long) reg6) << 32) + reg7; + return reg1; +} + +#endif /* _AP_ASM_H_ */ diff --git a/drivers/s390/crypto/ap_bus.c b/drivers/s390/crypto/ap_bus.c index c695219..f6de22a 100644 --- a/drivers/s390/crypto/ap_bus.c +++ b/drivers/s390/crypto/ap_bus.c @@ -48,6 +48,7 @@ #include <linux/crypto.h> #include "ap_bus.h" +#include "ap_asm.h" /* * Module description. @@ -130,26 +131,6 @@ static inline int ap_using_interrupts(void) } /** - * ap_intructions_available() - Test if AP instructions are available. - * - * Returns 0 if the AP instructions are installed. - */ -static inline int ap_instructions_available(void) -{ - register unsigned long reg0 asm ("0") = AP_MKQID(0,0); - register unsigned long reg1 asm ("1") = -ENODEV; - register unsigned long reg2 asm ("2") = 0UL; - - asm volatile( - " .long 0xb2af0000\n" /* PQAP(TAPQ) */ - "0: la %1,0\n" - "1:\n" - EX_TABLE(0b, 1b) - : "+d" (reg0), "+d" (reg1), "+d" (reg2) : : "cc" ); - return reg1; -} - -/** * ap_interrupts_available(): Test if AP interrupts are available. * * Returns 1 if AP interrupts are available. @@ -170,19 +151,6 @@ static int ap_configuration_available(void) return test_facility(12); } -static inline struct ap_queue_status -__pqap_tapq(ap_qid_t qid, unsigned long *info) -{ - register unsigned long reg0 asm ("0") = qid; - register struct ap_queue_status reg1 asm ("1"); - register unsigned long reg2 asm ("2") = 0UL; - - asm volatile(".long 0xb2af0000" /* PQAP(TAPQ) */ - : "+d" (reg0), "=d" (reg1), "+d" (reg2) : : "cc"); - *info = reg2; - return reg1; -} - /** * ap_test_queue(): Test adjunct processor queue. * @qid: The AP queue number @@ -193,85 +161,16 @@ __pqap_tapq(ap_qid_t qid, unsigned long *info) static inline struct ap_queue_status ap_test_queue(ap_qid_t qid, unsigned long *info) { - struct ap_queue_status aqs; - unsigned long _info; - if (test_facility(15)) qid |= 1UL << 23; /* set APFT T bit*/ - aqs = __pqap_tapq(qid, &_info); - if (info) - *info = _info; - return aqs; -} - -/** - * ap_reset_queue(): Reset adjunct processor queue. - * @qid: The AP queue number - * - * Returns AP queue status structure. - */ -static inline struct ap_queue_status ap_reset_queue(ap_qid_t qid) -{ - register unsigned long reg0 asm ("0") = qid | 0x01000000UL; - register struct ap_queue_status reg1 asm ("1"); - register unsigned long reg2 asm ("2") = 0UL; - - asm volatile( - ".long 0xb2af0000" /* PQAP(RAPQ) */ - : "+d" (reg0), "=d" (reg1), "+d" (reg2) : : "cc"); - return reg1; -} - -/** - * ap_queue_interruption_control(): Enable interruption for a specific AP. - * @qid: The AP queue number - * @ind: The notification indicator byte - * - * Returns AP queue status. - */ -static inline struct ap_queue_status -ap_queue_interruption_control(ap_qid_t qid, void *ind) -{ - register unsigned long reg0 asm ("0") = qid | 0x03000000UL; - register unsigned long reg1_in asm ("1") = 0x0000800000000000UL | AP_ISC; - register struct ap_queue_status reg1_out asm ("1"); - register void *reg2 asm ("2") = ind; - asm volatile( - ".long 0xb2af0000" /* PQAP(AQIC) */ - : "+d" (reg0), "+d" (reg1_in), "=d" (reg1_out), "+d" (reg2) - : - : "cc" ); - return reg1_out; -} - -/** - * ap_query_configuration(): Get AP configuration data - * - * Returns 0 on success, or -EOPNOTSUPP. - */ -static inline int __ap_query_configuration(void) -{ - register unsigned long reg0 asm ("0") = 0x04000000UL; - register unsigned long reg1 asm ("1") = -EINVAL; - register void *reg2 asm ("2") = (void *) ap_configuration; - - asm volatile( - ".long 0xb2af0000\n" /* PQAP(QCI) */ - "0: la %1,0\n" - "1:\n" - EX_TABLE(0b, 1b) - : "+d" (reg0), "+d" (reg1), "+d" (reg2) - : - : "cc"); - - return reg1; + return ap_tapq(qid, info); } static inline int ap_query_configuration(void) { if (!ap_configuration) return -EOPNOTSUPP; - return __ap_query_configuration(); + return ap_qci(ap_configuration); } /** @@ -336,15 +235,15 @@ static inline int ap_test_config_domain(unsigned int domain) * @qid: The AP queue number * @ind: the notification indicator byte * - * Enables interruption on AP queue via ap_queue_interruption_control(). Based - * on the return value it waits a while and tests the AP queue if interrupts + * Enables interruption on AP queue via ap_aqic(). Based on the return + * value it waits a while and tests the AP queue if interrupts * have been switched on using ap_test_queue(). */ static int ap_queue_enable_interruption(struct ap_device *ap_dev, void *ind) { struct ap_queue_status status; - status = ap_queue_interruption_control(ap_dev->qid, ind); + status = ap_aqic(ap_dev->qid, ind); switch (status.response_code) { case AP_RESPONSE_NORMAL: case AP_RESPONSE_OTHERWISE_CHANGED: @@ -363,26 +262,6 @@ static int ap_queue_enable_interruption(struct ap_device *ap_dev, void *ind) } } -static inline struct ap_queue_status -__nqap(ap_qid_t qid, unsigned long long psmid, void *msg, size_t length) -{ - typedef struct { char _[length]; } msgblock; - register unsigned long reg0 asm ("0") = qid | 0x40000000UL; - register struct ap_queue_status reg1 asm ("1"); - register unsigned long reg2 asm ("2") = (unsigned long) msg; - register unsigned long reg3 asm ("3") = (unsigned long) length; - register unsigned long reg4 asm ("4") = (unsigned int) (psmid >> 32); - register unsigned long reg5 asm ("5") = psmid & 0xffffffff; - - asm volatile ( - "0: .long 0xb2ad0042\n" /* NQAP */ - " brc 2,0b" - : "+d" (reg0), "=d" (reg1), "+d" (reg2), "+d" (reg3) - : "d" (reg4), "d" (reg5), "m" (*(msgblock *) msg) - : "cc"); - return reg1; -} - /** * __ap_send(): Send message to adjunct processor queue. * @qid: The AP queue number @@ -402,7 +281,7 @@ __ap_send(ap_qid_t qid, unsigned long long psmid, void *msg, size_t length, { if (special == 1) qid |= 0x400000UL; - return __nqap(qid, psmid, msg, length); + return ap_nqap(qid, psmid, msg, length); } int ap_send(ap_qid_t qid, unsigned long long psmid, void *msg, size_t length) @@ -424,54 +303,13 @@ int ap_send(ap_qid_t qid, unsigned long long psmid, void *msg, size_t length) } EXPORT_SYMBOL(ap_send); -/** - * __ap_recv(): Receive message from adjunct processor queue. - * @qid: The AP queue number - * @psmid: Pointer to program supplied message identifier - * @msg: The message text - * @length: The message length - * - * Returns AP queue status structure. - * Condition code 1 on DQAP means the receive has taken place - * but only partially. The response is incomplete, hence the - * DQAP is repeated. - * Condition code 2 on DQAP also means the receive is incomplete, - * this time because a segment boundary was reached. Again, the - * DQAP is repeated. - * Note that gpr2 is used by the DQAP instruction to keep track of - * any 'residual' length, in case the instruction gets interrupted. - * Hence it gets zeroed before the instruction. - */ -static inline struct ap_queue_status -__ap_recv(ap_qid_t qid, unsigned long long *psmid, void *msg, size_t length) -{ - typedef struct { char _[length]; } msgblock; - register unsigned long reg0 asm("0") = qid | 0x80000000UL; - register struct ap_queue_status reg1 asm ("1"); - register unsigned long reg2 asm("2") = 0UL; - register unsigned long reg4 asm("4") = (unsigned long) msg; - register unsigned long reg5 asm("5") = (unsigned long) length; - register unsigned long reg6 asm("6") = 0UL; - register unsigned long reg7 asm("7") = 0UL; - - - asm volatile( - "0: .long 0xb2ae0064\n" /* DQAP */ - " brc 6,0b\n" - : "+d" (reg0), "=d" (reg1), "+d" (reg2), - "+d" (reg4), "+d" (reg5), "+d" (reg6), "+d" (reg7), - "=m" (*(msgblock *) msg) : : "cc" ); - *psmid = (((unsigned long long) reg6) << 32) + reg7; - return reg1; -} - int ap_recv(ap_qid_t qid, unsigned long long *psmid, void *msg, size_t length) { struct ap_queue_status status; if (msg == NULL) return -EINVAL; - status = __ap_recv(qid, psmid, msg, length); + status = ap_dqap(qid, psmid, msg, length); switch (status.response_code) { case AP_RESPONSE_NORMAL: return 0; @@ -577,8 +415,8 @@ static struct ap_queue_status ap_sm_recv(struct ap_device *ap_dev) struct ap_queue_status status; struct ap_message *ap_msg; - status = __ap_recv(ap_dev->qid, &ap_dev->reply->psmid, - ap_dev->reply->message, ap_dev->reply->length); + status = ap_dqap(ap_dev->qid, &ap_dev->reply->psmid, + ap_dev->reply->message, ap_dev->reply->length); switch (status.response_code) { case AP_RESPONSE_NORMAL: atomic_dec(&ap_poll_requests); @@ -739,7 +577,7 @@ static enum ap_wait ap_sm_reset(struct ap_device *ap_dev) { struct ap_queue_status status; - status = ap_reset_queue(ap_dev->qid); + status = ap_rapq(ap_dev->qid); switch (status.response_code) { case AP_RESPONSE_NORMAL: case AP_RESPONSE_RESET_IN_PROGRESS: @@ -1794,7 +1632,7 @@ static void ap_reset_domain(void) if (ap_domain_index == -1 || !ap_test_config_domain(ap_domain_index)) return; for (i = 0; i < AP_DEVICES; i++) - ap_reset_queue(AP_MKQID(i, ap_domain_index)); + ap_rapq(AP_MKQID(i, ap_domain_index)); } static void ap_reset_all(void) @@ -1807,7 +1645,7 @@ static void ap_reset_all(void) for (j = 0; j < AP_DEVICES; j++) { if (!ap_test_config_card_id(j)) continue; - ap_reset_queue(AP_MKQID(j, i)); + ap_rapq(AP_MKQID(j, i)); } } } |