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path: root/drivers/infiniband/hw/cxgb4 (follow)
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2010-07-06RDMA/cxgb4: Derive smac_idx from port viidSteve Wise1-4/+5
Signed-off-by: Steve Wise <swise@opengridcomputing.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
2010-07-06RDMA/cxgb4: Avoid false GTS CIDX_INC overflowsSteve Wise1-5/+20
The T4 IQ hw design assumes CIDX_INC credits will be returned on a regular basis and always before the CIDX counter crosses over the PIDX counter. For RDMA CQs, however, returning CIDX_INC credits is only needed and desired when and if the CQ is armed for notification. This can lead to a GTS write returning credits that causes the HW to reject the credit update because it causes CIDX to pass PIDX. Once this happens, the CIDX/PIDX counters get out of whack and an application can miss a notification and get stuck blocked awaiting a notification. To avoid this, we allocate the HW IQ 2x times the requested size. This seems to avoid the false overflow failures. If we see more issues with this, then we'll have to add code in the poll path to return credits periodically like when the amount reaches 1/2 the queue depth). I would like to avoid this as it adds a PCI write transaction for applications that never arm the CQ (like most MPIs). Signed-off-by: Steve Wise <swise@opengridcomputing.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
2010-07-06RDMA/cxgb4: Don't call abort_connection() for active connect failuresSteve Wise1-1/+2
Signed-off-by: Steve Wise <swise@opengridcomputing.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
2010-07-06RDMA/cxgb4: Use the DMA state API instead of the pci equivalentsFUJITA Tomonori5-15/+15
This replace the PCI DMA state API (include/linux/pci-dma.h) with the DMA equivalents since the PCI DMA state API will be obsolete. No functional change. For further information about the background: http://marc.info/?l=linux-netdev&m=127037540020276&w=2 Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Acked-by: Steve Wise <swise@opengridcomputing.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
2010-05-25Merge branches 'cxgb4', 'misc', 'mlx4', 'nes' and 'qib' into for-nextRoland Dreier1-1/+1
2010-05-24RDMA/cxgb4: Only insert sq qid in lookup tableSteve Wise1-16/+9
Signed-off-by: Steve Wise <swise@opengridcomputing.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
2010-05-24RDMA/cxgb4: Support IB_WR_READ_WITH_INV opcodeSteve Wise1-1/+5
Signed-off-by: Steve Wise <swise@opengridcomputing.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
2010-05-24RDMA/cxgb4: Set fence flag for inv-local-stag work requestsSteve Wise1-0/+2
Signed-off-by: Steve Wise <swise@opengridcomputing.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
2010-05-24RDMA/cxgb4: Update some HW limitsSteve Wise1-8/+9
Signed-off-by: Steve Wise <swise@opengridcomputing.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
2010-05-24RDMA/cxgb4: Don't limit fastreg page list depthSteve Wise1-3/+0
Signed-off-by: Steve Wise <swise@opengridcomputing.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
2010-05-24RDMA/cxgb4: Return proper errors in fastreg mr/pbl allocationSteve Wise1-2/+6
Signed-off-by: Steve Wise <swise@opengridcomputing.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
2010-05-24RDMA/cxgb4: Fix overflow bug in CQ armSteve Wise1-19/+12
- wrap cq->cqidx_inc based on cq size. - optimize t4_arm_cq logic. Signed-off-by: Steve Wise <swise@opengridcomputing.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
2010-05-24RDMA/cxgb4: Optimize CQ overflow detectionSteve Wise2-12/+17
1) save the timestamp flit in the cq when we consume a CQE. 2) always compare the saved flit with the previous entry flit when reading the next CQE entry. If the flits don't compare, then we have overflowed. Signed-off-by: Steve Wise <swise@opengridcomputing.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
2010-05-24RDMA/cxgb4: CQ size must be IQ size - 2Steve Wise1-1/+4
We need 1 extra entry for the status page and 1 to always have 1 free entry to detect when the queue is full. Signed-off-by: Steve Wise <swise@opengridcomputing.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
2010-05-24RDMA/cxgb4: Register RDMA provider based on LLD state_change eventsSteve Wise3-10/+39
The LLD now supports proper UP state change events, so move the RDMA provider registration to UP path. This fixes a crash when loading iw_cxgb4 _after_ the NFS/RDMA transport is up and running. Signed-off-by: Steve Wise <swise@opengridcomputing.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
2010-05-24RDMA/cxgb4: Detach from the LLD after unregistering RDMA deviceSteve Wise1-3/+1
In the RDMA core unregister path, kernel users will be calling down into the T4 provider to release resources. So we cannot detach from the LLD until this process completes. Signed-off-by: Steve Wise <swise@opengridcomputing.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
2010-05-21IB/core: Allow device-specific per-port sysfs filesRalph Campbell1-1/+1
Add a new parameter to ib_register_device() so that low-level device drivers can pass in a pointer to a callback function that will be called for each port that is registered in sysfs. This allows low-level device drivers to create files in /sys/class/infiniband/<hca>/ports/<N>/ without having to poke through the internals of the RDMA sysfs handling. There is no need for an unregister function since the kobject reference will go to zero when ib_unregister_device() is called. Signed-off-by: Ralph Campbell <ralph.campbell@qlogic.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
2010-05-05MAINTAINERS: Add cxgb4 and iw_cxgb4 entriesRoland Dreier6-164/+224
Signed-off-by: Roland Dreier <rolandd@cisco.com>
2010-04-21RDMA/cxgb4: Add driver for Chelsio T4 RNICSteve Wise14-0/+9445
Add an RDMA/iWARP driver for Chelsio T4 Ethernet adapters. Signed-off-by: Steve Wise <swise@opengridcomputing.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
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