Commit 0db78559 authored by Martin Schwidefsky's avatar Martin Schwidefsky
Browse files

s390/zcrypt: header for the AP inline assmblies 



Move the inline assemblies for the AP bus into a separate header file.

Signed-off-by: default avatarMartin Schwidefsky <schwidefsky@de.ibm.com>
parent 236fb2ab

drivers/s390/crypto/ap_asm.h

0 → 100644
+191 −0
Original line number Diff line number Diff line 
/*

 * 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_ */

drivers/s390/crypto/ap_bus.c

+13 −175
Original line number Diff line number Diff line
@@ -48,6 +48,7 @@ 
#include <linux/crypto.h>



#include "ap_bus.h"

#include "ap_asm.h"



/*

 * Module description.
@@ -129,26 +130,6 @@ static inline int ap_using_interrupts(void) 
	return ap_airq_flag;

}



/**

 * 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.

 *
@@ -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;
@@ -577,7 +415,7 @@ 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,

	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:
@@ -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));

		}

	}

}