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Commit 3dec1922 authored by Michael Mueller's avatar Michael Mueller Committed by Christian Borntraeger
Browse files

s390/cio: add function chsc_sgib() 



This patch implements the Set Guest Information Block operation
to request association or disassociation of a Guest Information
Block (GIB) with the Adapter Interruption Facility. The operation
is required to receive GIB alert interrupts for guest adapters
in conjunction with AIV and GISA.

Signed-off-by: default avatarMichael Mueller <mimu@linux.ibm.com>
Reviewed-by: default avatarSebastian Ott <sebott@linux.ibm.com>
Reviewed-by: default avatarPierre Morel <pmorel@linux.ibm.com>
Reviewed-by: default avatarChristian Borntraeger <borntraeger@de.ibm.com>
Acked-by: default avatarHalil Pasic <pasic@linux.ibm.com>
Acked-by: default avatarJanosch Frank <frankja@linux.ibm.com>
Acked-by: default avatarCornelia Huck <cohuck@redhat.com>
Message-Id: <20190131085247.13826-9-mimu@linux.ibm.com>
Signed-off-by: default avatarChristian Borntraeger <borntraeger@de.ibm.com>
parent 982cff42

arch/s390/include/asm/cio.h

+1 −0
Original line number Diff line number Diff line
@@ -331,5 +331,6 @@ extern void css_schedule_reprobe(void); 
/* Function from drivers/s390/cio/chsc.c */

int chsc_sstpc(void *page, unsigned int op, u16 ctrl, u64 *clock_delta);

int chsc_sstpi(void *page, void *result, size_t size);

int chsc_sgib(u32 origin);



#endif

drivers/s390/cio/chsc.c

+37 −0
Original line number Diff line number Diff line
@@ -1382,3 +1382,40 @@ int chsc_pnso_brinfo(struct subchannel_id schid, 
	return chsc_error_from_response(brinfo_area->response.code);

}

EXPORT_SYMBOL_GPL(chsc_pnso_brinfo);



int chsc_sgib(u32 origin)

{

	struct {

		struct chsc_header request;

		u16 op;

		u8  reserved01[2];

		u8  reserved02:4;

		u8  fmt:4;

		u8  reserved03[7];

		/* operation data area begin */

		u8  reserved04[4];

		u32 gib_origin;

		u8  reserved05[10];

		u8  aix;

		u8  reserved06[4029];

		struct chsc_header response;

		u8  reserved07[4];

	} *sgib_area;

	int ret;



	spin_lock_irq(&chsc_page_lock);

	memset(chsc_page, 0, PAGE_SIZE);

	sgib_area = chsc_page;

	sgib_area->request.length = 0x0fe0;

	sgib_area->request.code = 0x0021;

	sgib_area->op = 0x1;

	sgib_area->gib_origin = origin;



	ret = chsc(sgib_area);

	if (ret == 0)

		ret = chsc_error_from_response(sgib_area->response.code);

	spin_unlock_irq(&chsc_page_lock);



	return ret;

}

EXPORT_SYMBOL_GPL(chsc_sgib);

drivers/s390/cio/chsc.h

+1 −0
Original line number Diff line number Diff line
@@ -164,6 +164,7 @@ int chsc_get_channel_measurement_chars(struct channel_path *chp); 
int chsc_ssqd(struct subchannel_id schid, struct chsc_ssqd_area *ssqd);

int chsc_sadc(struct subchannel_id schid, struct chsc_scssc_area *scssc,

	      u64 summary_indicator_addr, u64 subchannel_indicator_addr);

int chsc_sgib(u32 origin);

int chsc_error_from_response(int response);



int chsc_siosl(struct subchannel_id schid);