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Commit 9cb7284f authored by frank.blaschka@de.ibm.com's avatar frank.blaschka@de.ibm.com Committed by David S. Miller
Browse files

qdio: support forced signal adapter indications 



This patch ensures that signal adapter commands are issued if they are
indicated to be required.

Signed-off-by: default avatarEinar Lueck <elelueck@de.ibm.com>
Signed-off-by: default avatarJan Glauber <jang@linux.vnet.ibm.com>
Signed-off-by: default avatarFrank Blaschka <frank.blaschka@de.ibm.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 104ea556

arch/s390/include/asm/qdio.h

+10 −0
Original line number Diff line number Diff line
@@ -279,6 +279,16 @@ struct qdio_outbuf_state { 


#define CHSC_AC1_INITIATE_INPUTQ	0x80





/* qdio adapter-characteristics-1 flag */

#define AC1_SIGA_INPUT_NEEDED		0x40	/* process input queues */

#define AC1_SIGA_OUTPUT_NEEDED		0x20	/* process output queues */

#define AC1_SIGA_SYNC_NEEDED		0x10	/* ask hypervisor to sync */

#define AC1_AUTOMATIC_SYNC_ON_THININT	0x08	/* set by hypervisor */

#define AC1_AUTOMATIC_SYNC_ON_OUT_PCI	0x04	/* set by hypervisor */

#define AC1_SC_QEBSM_AVAILABLE		0x02	/* available for subchannel */

#define AC1_SC_QEBSM_ENABLED		0x01	/* enabled for subchannel */



#define CHSC_AC2_DATA_DIV_AVAILABLE	0x0010

#define CHSC_AC2_DATA_DIV_ENABLED	0x0002

drivers/s390/cio/qdio.h

+0 −9
Original line number Diff line number Diff line
@@ -87,15 +87,6 @@ enum qdio_irq_states { 
#define CHSC_FLAG_QDIO_CAPABILITY	0x80

#define CHSC_FLAG_VALIDITY		0x40



/* qdio adapter-characteristics-1 flag */

#define AC1_SIGA_INPUT_NEEDED		0x40	/* process input queues */

#define AC1_SIGA_OUTPUT_NEEDED		0x20	/* process output queues */

#define AC1_SIGA_SYNC_NEEDED		0x10	/* ask hypervisor to sync */

#define AC1_AUTOMATIC_SYNC_ON_THININT	0x08	/* set by hypervisor */

#define AC1_AUTOMATIC_SYNC_ON_OUT_PCI	0x04	/* set by hypervisor */

#define AC1_SC_QEBSM_AVAILABLE		0x02	/* available for subchannel */

#define AC1_SC_QEBSM_ENABLED		0x01	/* enabled for subchannel */



/* SIGA flags */

#define QDIO_SIGA_WRITE		0x00

#define QDIO_SIGA_READ		0x01

drivers/s390/cio/qdio_main.c

+1 −4
Original line number Diff line number Diff line
@@ -1592,12 +1592,9 @@ static int handle_inbound(struct qdio_q *q, unsigned int callflags, 
	used = atomic_add_return(count, &q->nr_buf_used) - count;

	BUG_ON(used + count > QDIO_MAX_BUFFERS_PER_Q);



	/* no need to signal as long as the adapter had free buffers */

	if (used)

		return 0;



	if (need_siga_in(q))

		return qdio_siga_input(q);



	return 0;

}