diff options
| author | Jan Glauber <jang@linux.vnet.ibm.com> | 2010-09-08 01:14:39 +0400 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2010-09-09 01:31:00 +0400 |
| commit | d36deae75011a7890f0e730dd0f867c64081cb50 (patch) | |
| tree | d24672cf5cc40c637186362187450362cabefd24 /drivers/s390/scsi/zfcp_qdio.c | |
| parent | e508be174ad36b0cf9b324cd04978c2b13c21502 (diff) | |
| download | linux-d36deae75011a7890f0e730dd0f867c64081cb50.tar.xz | |
qdio: extend API to allow polling
Extend the qdio API to allow polling in the upper-layer driver. This
is needed by qeth to use NAPI.
To use the new interface the upper-layer driver must specify the
queue_start_poll(). This callback is used to signal the upper-layer
driver that is has initiative and must process the inbound queue by
calling qdio_get_next_buffers(). If the upper-layer driver wants to
stop polling it calls qdio_start_irq().
Since adapter interrupts are not completely stoppable qdio implements
a software bit QDIO_QUEUE_IRQS_DISABLED to safely disable interrupts for an
input queue.
The old interface is preserved and will be used as is by zfcp.
Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Frank Blaschka <frank.blaschka@de.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/s390/scsi/zfcp_qdio.c')
| -rw-r--r-- | drivers/s390/scsi/zfcp_qdio.c | 6 |
1 files changed, 1 insertions, 5 deletions
diff --git a/drivers/s390/scsi/zfcp_qdio.c b/drivers/s390/scsi/zfcp_qdio.c index b2635759721c..da54a28a1b87 100644 --- a/drivers/s390/scsi/zfcp_qdio.c +++ b/drivers/s390/scsi/zfcp_qdio.c @@ -277,16 +277,12 @@ int zfcp_qdio_send(struct zfcp_qdio *qdio, struct zfcp_qdio_req *q_req) static void zfcp_qdio_setup_init_data(struct qdio_initialize *id, struct zfcp_qdio *qdio) { - + memset(id, 0, sizeof(*id)); id->cdev = qdio->adapter->ccw_device; id->q_format = QDIO_ZFCP_QFMT; memcpy(id->adapter_name, dev_name(&id->cdev->dev), 8); ASCEBC(id->adapter_name, 8); id->qib_rflags = QIB_RFLAGS_ENABLE_DATA_DIV; - id->qib_param_field_format = 0; - id->qib_param_field = NULL; - id->input_slib_elements = NULL; - id->output_slib_elements = NULL; id->no_input_qs = 1; id->no_output_qs = 1; id->input_handler = zfcp_qdio_int_resp; |