From 59fef3b1e96217c6e736372ff8cc95cbcca1b6aa Mon Sep 17 00:00:00 2001 From: Jack Morgenstein Date: Tue, 11 Apr 2006 18:16:27 +0300 Subject: 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 Signed-off-by: Roland Dreier --- drivers/infiniband/hw/mthca/mthca_main.c | 1 + 1 file changed, 1 insertion(+) (limited to 'drivers/infiniband/hw/mthca/mthca_main.c') diff --git a/drivers/infiniband/hw/mthca/mthca_main.c b/drivers/infiniband/hw/mthca/mthca_main.c index 7e9c97b09404..9b9ff7bff357 100644 --- a/drivers/infiniband/hw/mthca/mthca_main.c +++ b/drivers/infiniband/hw/mthca/mthca_main.c @@ -191,6 +191,7 @@ static int __devinit mthca_dev_lim(struct mthca_dev *mdev, struct mthca_dev_lim mdev->limits.reserved_srqs = dev_lim->reserved_srqs; mdev->limits.reserved_eecs = dev_lim->reserved_eecs; mdev->limits.max_desc_sz = dev_lim->max_desc_sz; + mdev->limits.max_srq_sge = mthca_max_srq_sge(mdev); /* * Subtract 1 from the limit because we need to allocate a * spare CQE so the HCA HW can tell the difference between an -- cgit v1.2.3-59-g8ed1b