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| author | Jan Glauber <jang@linux.vnet.ibm.com> | 2010-09-07 23:14:39 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2010-09-08 23:31:00 +0200 |
| commit | d36deae75011a7890f0e730dd0f867c64081cb50 (patch) | |
| tree | d24672cf5cc40c637186362187450362cabefd24 /drivers/md | |
| parent | e1000: fix Tx hangs by disabling 64-bit DMA (diff) | |
| download | linux-d36deae75011a7890f0e730dd0f867c64081cb50.tar.xz linux-d36deae75011a7890f0e730dd0f867c64081cb50.zip | |
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/md')
0 files changed, 0 insertions, 0 deletions