diff options
| author | santosh.shilimkar@oracle.com <santosh.shilimkar@oracle.com> | 2016-03-01 15:20:52 -0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2016-03-02 14:13:19 -0500 |
| commit | 2cb2912d65633e751d3f8397377174501412aa47 (patch) | |
| tree | 690fc1a19547289d37f9cf831f03d49e5e5a17ee /net/rds/ib.c | |
| parent | db42753adb638b63572583162bb08ea193947309 (diff) | |
| download | linux-2cb2912d65633e751d3f8397377174501412aa47.tar.bz2 | |
RDS: IB: add Fastreg MR (FRMR) detection support
Discovere Fast Memmory Registration support using IB device
IB_DEVICE_MEM_MGT_EXTENSIONS. Certain HCA might support just FRMR
or FMR or both FMR and FRWR. In case both mr type are supported,
default FMR is used.
Default MR is still kept as FMR against what everyone else
is following. Default will be changed to FRMR once the
RDS performance with FRMR is comparable with FMR. The
work is in progress for the same.
Signed-off-by: Santosh Shilimkar <ssantosh@kernel.org>
Signed-off-by: Santosh Shilimkar <santosh.shilimkar@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/rds/ib.c')
| -rw-r--r-- | net/rds/ib.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/net/rds/ib.c b/net/rds/ib.c index bb32cb9d85f1..b5342fddaf98 100644 --- a/net/rds/ib.c +++ b/net/rds/ib.c @@ -140,6 +140,12 @@ static void rds_ib_add_one(struct ib_device *device) rds_ibdev->max_wrs = device->attrs.max_qp_wr; rds_ibdev->max_sge = min(device->attrs.max_sge, RDS_IB_MAX_SGE); + rds_ibdev->has_fr = (device->attrs.device_cap_flags & + IB_DEVICE_MEM_MGT_EXTENSIONS); + rds_ibdev->has_fmr = (device->alloc_fmr && device->dealloc_fmr && + device->map_phys_fmr && device->unmap_fmr); + rds_ibdev->use_fastreg = (rds_ibdev->has_fr && !rds_ibdev->has_fmr); + rds_ibdev->fmr_max_remaps = device->attrs.max_map_per_fmr?: 32; rds_ibdev->max_1m_mrs = device->attrs.max_mr ? min_t(unsigned int, (device->attrs.max_mr / 2), @@ -178,6 +184,10 @@ static void rds_ib_add_one(struct ib_device *device) rds_ibdev->fmr_max_remaps, rds_ibdev->max_1m_mrs, rds_ibdev->max_8k_mrs); + pr_info("RDS/IB: %s: %s supported and preferred\n", + device->name, + rds_ibdev->use_fastreg ? "FRMR" : "FMR"); + INIT_LIST_HEAD(&rds_ibdev->ipaddr_list); INIT_LIST_HEAD(&rds_ibdev->conn_list); |