diff options
| author | Jack Morgenstein <jackm@mellanox.co.il> | 2006-04-11 18:16:27 +0300 |
|---|---|---|
| committer | Roland Dreier <rolandd@cisco.com> | 2006-04-12 11:42:30 -0700 |
| commit | 59fef3b1e96217c6e736372ff8cc95cbcca1b6aa (patch) | |
| tree | 5373713d77df970b52e9dd968a69252d469433a9 /drivers/infiniband/hw/mthca/mthca_dev.h | |
| parent | ce684df05a531904ea055d01aeee75321fa0db1e (diff) | |
IB/mthca: Fix max_srq_sge returned by ib_query_device for Tavor devices
The driver allocates SRQ WQEs size with a power of 2 size both for
Tavor and for memfree. For Tavor, however, the hardware only requires
the WQE size to be a multiple of 16, not a power of 2, and the max
number of scatter-gather allowed is reported accordingly by the
firmware (and this is the value currently returned by
ib_query_device() and ibv_query_device()).
If the max number of scatter/gather entries reported by the FW is used
when creating an SRQ, the creation will fail for Tavor, since the
required WQE size will be increased to the next power of 2, which
turns out to be larger than the device permitted max WQE size (which
is not a power of 2).
This patch reduces the reported SRQ max wqe size so that it can be used
successfully in creating an SRQ on Tavor HCAs.
Signed-off-by: Jack Morgenstein <jackm@mellanox.co.il>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
Diffstat (limited to 'drivers/infiniband/hw/mthca/mthca_dev.h')
| -rw-r--r-- | drivers/infiniband/hw/mthca/mthca_dev.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/infiniband/hw/mthca/mthca_dev.h b/drivers/infiniband/hw/mthca/mthca_dev.h index 49d0eae5518..4c1dcb4c182 100644 --- a/drivers/infiniband/hw/mthca/mthca_dev.h +++ b/drivers/infiniband/hw/mthca/mthca_dev.h @@ -151,6 +151,7 @@ struct mthca_limits { int reserved_qps; int num_srqs; int max_srq_wqes; + int max_srq_sge; int reserved_srqs; int num_eecs; int reserved_eecs; @@ -507,6 +508,7 @@ void mthca_free_srq(struct mthca_dev *dev, struct mthca_srq *srq); int mthca_modify_srq(struct ib_srq *ibsrq, struct ib_srq_attr *attr, enum ib_srq_attr_mask attr_mask); int mthca_query_srq(struct ib_srq *srq, struct ib_srq_attr *srq_attr); +int mthca_max_srq_sge(struct mthca_dev *dev); void mthca_srq_event(struct mthca_dev *dev, u32 srqn, enum ib_event_type event_type); void mthca_free_srq_wqe(struct mthca_srq *srq, u32 wqe_addr); |