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Commit c2b5934f authored by Rob Gardner's avatar Rob Gardner Committed by David S. Miller
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sparc64: Oracle DAX infrastructure 



This patch adds hypercall function stubs and C templates for
ccb_submit/info/kill which provide coprocessor services for the Oracle
Data Analytics Accelerator, registration for the DAX api group, and
all the various associated constants.

Signed-off-by: default avatarRob Gardner <rob.gardner@oracle.com>
Signed-off-by: default avatarJonathan Helman <jonathan.helman@oracle.com>
Signed-off-by: default avatarSanath Kumar <sanath099@gmail.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 0d665e7b

arch/sparc/include/asm/hypervisor.h

+138 −0
Original line number Diff line number Diff line
@@ -76,6 +76,10 @@ 
#define HV_ETOOMANY			15 /* Too many items specified     */

#define HV_ECHANNEL			16 /* Invalid LDC channel          */

#define HV_EBUSY			17 /* Resource busy                */

#define HV_EUNAVAILABLE			23 /* Resource or operation not

					    * currently available, but may

					    * become available in the future

					    */



/* mach_exit()

 * TRAP:	HV_FAST_TRAP
@@ -941,6 +945,139 @@ unsigned long sun4v_mmu_map_perm_addr(unsigned long vaddr, 
 */

#define HV_FAST_MEM_SYNC		0x32



/* Coprocessor services

 *

 * M7 and later processors provide an on-chip coprocessor which

 * accelerates database operations, and is known internally as

 * DAX.

 */



/* ccb_submit()

 * TRAP:	HV_FAST_TRAP

 * FUNCTION:	HV_CCB_SUBMIT

 * ARG0:	address of CCB array

 * ARG1:	size (in bytes) of CCB array being submitted

 * ARG2:	flags

 * ARG3:	reserved

 * RET0:	status (success or error code)

 * RET1:	size (in bytes) of CCB array that was accepted (might be less

 *		than arg1)

 * RET2:	status data

 *		if status == ENOMAP or ENOACCESS, identifies the VA in question

 *		if status == EUNAVAILBLE, unavailable code

 * RET3:	reserved

 *

 * ERRORS:	EOK		successful submission (check size)

 *		EWOULDBLOCK	could not finish submissions, try again

 *		EBADALIGN	array not 64B aligned or size not 64B multiple

 *		ENORADDR	invalid RA for array or in CCB

 *		ENOMAP		could not translate address (see status data)

 *		EINVAL		invalid ccb or arguments

 *		ETOOMANY	too many ccbs with all-or-nothing flag

 *		ENOACCESS	guest has no access to submit ccbs or address

 *				in CCB does not have correct permissions (check

 *				status data)

 *		EUNAVAILABLE	ccb operation could not be performed at this

 *				time (check status data)

 *				Status data codes:

 *					0 - exact CCB could not be executed

 *					1 - CCB opcode cannot be executed

 *					2 - CCB version cannot be executed

 *					3 - vcpu cannot execute CCBs

 *					4 - no CCBs can be executed

 */



#define HV_CCB_SUBMIT               0x34

#ifndef __ASSEMBLY__

unsigned long sun4v_ccb_submit(unsigned long ccb_buf,

			       unsigned long len,

			       unsigned long flags,

			       unsigned long reserved,

			       void *submitted_len,

			       void *status_data);

#endif



/* flags (ARG2) */

#define HV_CCB_QUERY_CMD		BIT(1)

#define HV_CCB_ARG0_TYPE_REAL		0UL

#define HV_CCB_ARG0_TYPE_PRIMARY	BIT(4)

#define HV_CCB_ARG0_TYPE_SECONDARY	BIT(5)

#define HV_CCB_ARG0_TYPE_NUCLEUS	GENMASK(5, 4)

#define HV_CCB_ARG0_PRIVILEGED		BIT(6)

#define HV_CCB_ALL_OR_NOTHING		BIT(7)

#define HV_CCB_QUEUE_INFO		BIT(8)

#define HV_CCB_VA_REJECT		0UL

#define HV_CCB_VA_SECONDARY		BIT(13)

#define HV_CCB_VA_NUCLEUS		GENMASK(13, 12)

#define HV_CCB_VA_PRIVILEGED		BIT(14)

#define HV_CCB_VA_READ_ADI_DISABLE	BIT(15)	/* DAX2 only */



/* ccb_info()

 * TRAP:	HV_FAST_TRAP

 * FUNCTION:	HV_CCB_INFO

 * ARG0:	real address of CCB completion area

 * RET0:	status (success or error code)

 * RET1:	info array

 *			- RET1[0]: CCB state

 *			- RET1[1]: dax unit

 *			- RET1[2]: queue number

 *			- RET1[3]: queue position

 *

 * ERRORS:	EOK		operation successful

 *		EBADALIGN	address not 64B aligned

 *		ENORADDR	RA in address not valid

 *		EINVAL		CA not valid

 *		EWOULDBLOCK	info not available for this CCB currently, try

 *				again

 *		ENOACCESS	guest cannot use dax

 */



#define HV_CCB_INFO                 0x35

#ifndef __ASSEMBLY__

unsigned long sun4v_ccb_info(unsigned long ca,

			     void *info_arr);

#endif



/* info array byte offsets (RET1) */

#define CCB_INFO_OFFSET_CCB_STATE	0

#define CCB_INFO_OFFSET_DAX_UNIT	2

#define CCB_INFO_OFFSET_QUEUE_NUM	4

#define CCB_INFO_OFFSET_QUEUE_POS	6



/* CCB state (RET1[0]) */

#define HV_CCB_STATE_COMPLETED      0

#define HV_CCB_STATE_ENQUEUED       1

#define HV_CCB_STATE_INPROGRESS     2

#define HV_CCB_STATE_NOTFOUND       3



/* ccb_kill()

 * TRAP:	HV_FAST_TRAP

 * FUNCTION:	HV_CCB_KILL

 * ARG0:	real address of CCB completion area

 * RET0:	status (success or error code)

 * RET1:	CCB kill status

 *

 * ERRORS:	EOK		operation successful

 *		EBADALIGN	address not 64B aligned

 *		ENORADDR	RA in address not valid

 *		EINVAL		CA not valid

 *		EWOULDBLOCK	kill not available for this CCB currently, try

 *				again

 *		ENOACCESS	guest cannot use dax

 */



#define HV_CCB_KILL                 0x36

#ifndef __ASSEMBLY__

unsigned long sun4v_ccb_kill(unsigned long ca,

			     void *kill_status);

#endif



/* CCB kill status (RET1) */

#define HV_CCB_KILL_COMPLETED       0

#define HV_CCB_KILL_DEQUEUED        1

#define HV_CCB_KILL_KILLED          2

#define HV_CCB_KILL_NOTFOUND        3



/* Time of day services.

 *

 * The hypervisor maintains the time of day on a per-domain basis.
@@ -3355,6 +3492,7 @@ unsigned long sun4v_m7_set_perfreg(unsigned long reg_num, 
#define HV_GRP_SDIO_ERR			0x0109

#define HV_GRP_REBOOT_DATA		0x0110

#define HV_GRP_ATU			0x0111

#define HV_GRP_DAX			0x0113

#define HV_GRP_M7_PERF			0x0114

#define HV_GRP_NIAG_PERF		0x0200

#define HV_GRP_FIRE_PERF		0x0201

arch/sparc/kernel/hvapi.c

+1 −0
Original line number Diff line number Diff line
@@ -41,6 +41,7 @@ static struct api_info api_table[] = { 
	{ .group = HV_GRP_SDIO_ERR,				},

	{ .group = HV_GRP_REBOOT_DATA,				},

	{ .group = HV_GRP_ATU,		.flags = FLAG_PRE_API	},

	{ .group = HV_GRP_DAX,					},

	{ .group = HV_GRP_NIAG_PERF,	.flags = FLAG_PRE_API	},

	{ .group = HV_GRP_FIRE_PERF,				},

	{ .group = HV_GRP_N2_CPU,				},

arch/sparc/kernel/hvcalls.S

+57 −0
Original line number Diff line number Diff line
@@ -871,3 +871,60 @@ ENTRY(sun4v_m7_set_perfreg) 
	retl

	nop

ENDPROC(sun4v_m7_set_perfreg)



	/* %o0: address of CCB array

	 * %o1: size (in bytes) of CCB array

	 * %o2: flags

	 * %o3: reserved

	 *

	 * returns:

	 * %o0: status

	 * %o1: size (in bytes) of the CCB array that was accepted

	 * %o2: status data

	 * %o3: reserved

	 */

ENTRY(sun4v_ccb_submit)

	mov	%o5, %g1

	mov	HV_CCB_SUBMIT, %o5

	ta	HV_FAST_TRAP

	stx	%o1, [%o4]

	retl

	 stx	%o2, [%g1]

ENDPROC(sun4v_ccb_submit)

EXPORT_SYMBOL(sun4v_ccb_submit)



	/* %o0: completion area ra for the ccb to get info

	 *

	 * returns:

	 * %o0: status

	 * %o1: CCB state

	 * %o2: position

	 * %o3: dax unit

	 * %o4: queue

	 */

ENTRY(sun4v_ccb_info)

	mov	%o1, %g1

	mov	HV_CCB_INFO, %o5

	ta	HV_FAST_TRAP

	sth	%o1, [%g1 + CCB_INFO_OFFSET_CCB_STATE]

	sth	%o2, [%g1 + CCB_INFO_OFFSET_QUEUE_POS]

	sth	%o3, [%g1 + CCB_INFO_OFFSET_DAX_UNIT]

	retl

	 sth	%o4, [%g1 + CCB_INFO_OFFSET_QUEUE_NUM]

ENDPROC(sun4v_ccb_info)

EXPORT_SYMBOL(sun4v_ccb_info)



	/* %o0: completion area ra for the ccb to kill

	 *

	 * returns:

	 * %o0: status

	 * %o1: result of the kill

	 */

ENTRY(sun4v_ccb_kill)

	mov	%o1, %g1

	mov	HV_CCB_KILL, %o5

	ta	HV_FAST_TRAP

	retl

	 sth	%o1, [%g1]

ENDPROC(sun4v_ccb_kill)

EXPORT_SYMBOL(sun4v_ccb_kill)