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s390/cio: add function chsc_sgib()

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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: Michael Mueller <mimu@linux.ibm.com>
Reviewed-by: Sebastian Ott <sebott@linux.ibm.com>
Reviewed-by: Pierre Morel <pmorel@linux.ibm.com>
Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com>
Acked-by: Halil Pasic <pasic@linux.ibm.com>
Acked-by: Janosch Frank <frankja@linux.ibm.com>
Acked-by: Cornelia Huck <cohuck@redhat.com>
Message-Id: <20190131085247.13826-9-mimu@linux.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
This commit is contained in:
Michael Mueller 2019-01-31 09:52:39 +01:00 committed by Christian Borntraeger
parent 982cff4259
commit 3dec192217
3 changed files with 39 additions and 0 deletions
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1
arch/s390/include/asm/cio.h
View File

@ -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

37
drivers/s390/cio/chsc.c
View File

@ -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);

1
drivers/s390/cio/chsc.h
View File

@ -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);