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qdio: support forced signal adapter indications

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

Signed-off-by: Einar Lueck <elelueck@de.ibm.com>
Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com>
Signed-off-by: Frank Blaschka <frank.blaschka@de.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
frank.blaschka@de.ibm.com 2011-08-08 01:33:56 +00:00 committed by David S. Miller
parent 104ea556ee
commit 9cb7284f30
3 changed files with 11 additions and 13 deletions
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10
arch/s390/include/asm/qdio.h
View file

@ -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

9
drivers/s390/cio/qdio.h
View file

@ -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

5
drivers/s390/cio/qdio_main.c
View file

@ -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;
}