diff options
| author | Julian Wiedmann <jwi@linux.ibm.com> | 2020-03-20 14:00:00 +0100 |
|---|---|---|
| committer | Vasily Gorbik <gor@linux.ibm.com> | 2020-04-06 13:13:50 +0200 |
| commit | d8564e19da8c8b31c7fc160942f95b113f554211 (patch) | |
| tree | aed39c231d9207fee043094363b911e3cbf663f8 /drivers/s390/net/qeth_core.h | |
| parent | ad96401cdb147efd486761db8159d5e3489c9ca8 (diff) | |
s390/qdio: allow for non-contiguous SBAL array in init_data
Upper-layer drivers allocate their SBALs by calling qdio_alloc_buffers()
for each individual queue. But when later passing the SBAL addresses to
qdio_establish(), they need to be in a single array of pointers.
So if the driver uses multiple Input or Output queues, it needs to
allocate a temporary array just to present all its SBAL pointers in this
layout.
This patch slightly changes the format of the QDIO initialization data,
so that drivers can pass a per-queue array where each element points to
a queue's SBAL array.
zfcp doesn't use multiple queues, so the impact there is trivial.
For qeth this brings a nice reduction in complexity, and removes
a page-sized allocation.
Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com>
Reviewed-by: Benjamin Block <bblock@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Diffstat (limited to 'drivers/s390/net/qeth_core.h')
| -rw-r--r-- | drivers/s390/net/qeth_core.h | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/drivers/s390/net/qeth_core.h b/drivers/s390/net/qeth_core.h index acda230323d5..e0b26310ecab 100644 --- a/drivers/s390/net/qeth_core.h +++ b/drivers/s390/net/qeth_core.h @@ -181,11 +181,12 @@ struct qeth_vnicc_info { /*****************************************************************************/ /* QDIO queue and buffer handling */ /*****************************************************************************/ -#define QETH_MAX_QUEUES 4 +#define QETH_MAX_OUT_QUEUES 4 #define QETH_IQD_MIN_TXQ 2 /* One for ucast, one for mcast. */ #define QETH_IQD_MCAST_TXQ 0 #define QETH_IQD_MIN_UCAST_TXQ 1 +#define QETH_MAX_IN_QUEUES 2 #define QETH_RX_COPYBREAK (PAGE_SIZE >> 1) #define QETH_IN_BUF_SIZE_DEFAULT 65536 #define QETH_IN_BUF_COUNT_DEFAULT 64 @@ -539,7 +540,7 @@ struct qeth_qdio_info { /* output */ int no_out_queues; - struct qeth_qdio_out_q *out_qs[QETH_MAX_QUEUES]; + struct qeth_qdio_out_q *out_qs[QETH_MAX_OUT_QUEUES]; struct qdio_outbuf_state *out_bufstates; /* priority queueing */ |