The following series implements support for iWARP transports in the iSER
initiator and target. This is based on v4.2-rc3.
I know we're in the middle of some API changes that will affect the isert
patches in this series, but I wanted to get these out for another round
of review. I can merge the isert changes on top of the new API once
it solidifies and we have a staging tree for them. My goal is to get
this series in for 4.3, so if the API changes don't gel fairly soon,
I ask that we consider pulling this series in first. But I'm definitly
willing to help get this -and- the API stuff in for 4.3.
Changes since V5:
The big change in V6 is to introduce new register/unregister functions in isert
to use FRMRs + local dma lkey for devices that support this yet do not
support DIF/PI. So iWARP devices do not require a DMA-MR.
svcrdma patch added to use max_sge_rd.
reordered the series some:
patch 1 is the small iser changes to support iwarp
patches 2..5 fix drivers to set max_sge_rd and ULPs to use them
patches 6-9 enhance isert to support iwarp
Changes since V4:
iser: fixedcompiler warning
isert: back to setting REMOTE_WRITE only for iWARP devices
Changes since V3:
Fixed commit messages based on feedback.
iser: adjust max_sectors
isert: split into 2 patches
isert: always set REMOTE_WRITE for dma mrs
Changes since V2:
The transport independent work is removed from this series and will
be submitted in a subsequent series. This V3 series now enables iWARP
using existing core services.
Changes since V1:
Introduce and use transport-independent RDMA core services for allocating
DMA MRs and computing fast register access flags.
Correctly set the device max_sge_rd capability in several rdma device
drivers.
isert: use device capability max_sge_rd for the read sge depth.
isert: change max_sge to max_write_sge in struct isert_conn.
---
Sagi Grimberg (1):
mlx4, mlx5, mthca: Expose max_sge_rd correctly
Steve Wise (8):
isert: Support iWARP transports using FRMRs
isert: Use local_dma_lkey whenever possible.
isert: Use the device's max fastreg page list depth
isert: Rename IO functions to more descriptive names
RDMA/isert: Limit read depth based on the device max_sge_rd capability
svcrdma: Use max_sge_rd for destination read depths
ipath,qib: Expose max_sge_rd correctly
RDMA/iser: Limit sg tablesize and max_sectors to device fastreg max depth
drivers/infiniband/hw/ipath/ipath_verbs.c | 1
drivers/infiniband/hw/mlx4/main.c | 1
drivers/infiniband/hw/mlx5/main.c | 1
drivers/infiniband/hw/mthca/mthca_provider.c | 1
drivers/infiniband/hw/qib/qib_verbs.c | 1
drivers/infiniband/ulp/iser/iscsi_iser.c | 9 +
drivers/infiniband/ulp/isert/ib_isert.c | 345 ++++++++++++++++++++++----
drivers/infiniband/ulp/isert/ib_isert.h | 5
include/linux/sunrpc/svc_rdma.h | 1
net/sunrpc/xprtrdma/svc_rdma_recvfrom.c | 12 -
net/sunrpc/xprtrdma/svc_rdma_transport.c | 4
11 files changed, 320 insertions(+), 61 deletions(-)
--
Steve
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