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| author | Sebastian Ott <sebott@linux.vnet.ibm.com> | 2014-06-27 16:56:18 +0200 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2014-07-22 09:26:13 +0200 |
| commit | 5245c924c2191ee0f39d8586a57178baba13dbf2 (patch) | |
| tree | 7e444c0c8c7e0e51acd20dd7b21450e2c2ef4b5f /arch/s390/include/asm/qdio.h | |
| parent | 15ba2236f3556fc01b9ca91394465152b5ea74b6 (diff) | |
| download | lwn-5245c924c2191ee0f39d8586a57178baba13dbf2.tar.gz lwn-5245c924c2191ee0f39d8586a57178baba13dbf2.zip | |
s390/qdio: add helpers to manage qdio buffers
Users of qdio buffers employ different strategies to manage these
buffers. The qeth driver uses huge contiguous buffers which leads
to high order allocations with all their downsides.
This patch provides helpers to allocate, free, and reset arrays of
qdio buffers using non contiguous pages.
Reviewed-by: Martin Peschke <mpeschke@linux.vnet.ibm.com>
Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/include/asm/qdio.h')
| -rw-r--r-- | arch/s390/include/asm/qdio.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/s390/include/asm/qdio.h b/arch/s390/include/asm/qdio.h index d786c634e052..06f3034605a1 100644 --- a/arch/s390/include/asm/qdio.h +++ b/arch/s390/include/asm/qdio.h @@ -415,6 +415,10 @@ struct qdio_brinfo_entry_l2 { #define QDIO_FLAG_SYNC_OUTPUT 0x02 #define QDIO_FLAG_PCI_OUT 0x10 +int qdio_alloc_buffers(struct qdio_buffer **buf, unsigned int count); +void qdio_free_buffers(struct qdio_buffer **buf, unsigned int count); +void qdio_reset_buffers(struct qdio_buffer **buf, unsigned int count); + extern int qdio_allocate(struct qdio_initialize *); extern int qdio_establish(struct qdio_initialize *); extern int qdio_activate(struct ccw_device *); |