linux/drivers/net/mlx4, branch v2.6.26.8

mlx4_core: Support creation of FMRs with pages smaller than 4K

2008-05-05T22:56:52Z

Don't hard code a test against a minimum page shift of 12, since the device may support smaller pages. Test against the actual smallest page size from the device capabilities. Signed-off-by: Oren Duer Signed-off-by: Jack Morgenstein Signed-off-by: Roland Dreier

mlx4_core: Avoid recycling old FMR R_Keys too soon

2008-04-29T20:46:53Z

When a FMR is unmapped, mlx4 resets the map count to 0, and clears the upper part of the R_Key which is used as the sequence counter. This poses a problem for RDS, which uses ib_fmr_unmap as a fence operation. RDS assumes that after issuing an unmap, the old R_Keys will be invalid for a "reasonable" period of time. For instance, Oracle processes uses shared memory buffers allocated from a pool of buffers. When a process dies, we want to reclaim these buffers -- but we must make sure there are no pending RDMA operations to/from those buffers. The only way to achieve that is by using unmap and sync the TPT. However, when the sequence count is reset on unmap, there is a high likelihood that a new mapping will be given the same R_Key that was issued a few milliseconds ago. To prevent this, don't reset the sequence count when unmapping a FMR. Signed-off-by: Olaf Kirch Signed-off-by: Roland Dreier

mlx4_core: Add a way to set the "collapsed" CQ flag

2008-04-29T20:46:50Z

Extend the mlx4_cq_resize() API with a way to set the "collapsed" flag for the CQ being created. Signed-off-by: Yevgeny Petrilin Signed-off-by: Roland Dreier

mlx4_core: Add helper to move QP to ready-to-send

2008-04-25T21:52:32Z

Avoid duplicating code in ethernet and FC modules. Signed-off-by: Yevgeny Petrilin Signed-off-by: Roland Dreier

mlx4_core: Add HW queues allocation helpers

2008-04-25T21:27:08Z

Wrap doorbell, buffer and MTT allocation in helper functions for ethernet and FC modules to use. Signed-off-by: Yevgeny Petrilin Signed-off-by: Roland Dreier

mlx4_core: CQ resizing should pass a 0 opcode modifier to MODIFY_CQ

2008-04-23T18:55:45Z

The call to mlx4_MODIFY_CQ() had a typo so that mlx4_cq_resize() was actually asking the FW to modify a CQ's interrupt moderation rather than asking it to resize a CQ. Signed-off-by: Vladimir Sokolovsky Signed-off-by: Roland Dreier

mlx4_core: Move kernel doorbell management into core

2008-04-23T18:55:45Z

In addition to mlx4_ib, there will be ethernet and FC consumers of mlx4_core, so move the code for managing kernel doorbells into the core module to avoid having to duplicate this multiple times. Signed-off-by: Yevgeny Petrilin Signed-off-by: Roland Dreier

IB/mlx4: Fix incorrect comment

2008-04-17T04:09:35Z

mlx4 hardware does not support external DDR memory. Moreover, UAR area (BAR 2) can change depending on FW version. Signed-off-by: Eli Cohen Signed-off-by: Roland Dreier

IB/mlx4: Fix race when detaching a QP from a multicast group

2008-04-17T04:09:35Z

When detaching the last QP from an MCG entry, we need to make sure that at any time, there will be no entry with zero number of QPs which is linked to the list of the MCGs of the corresponding hash index. So don't write back the MCG entry if we are removing the last QP; just unlink the entry. Also, remove an unnecessary MCG read when attaching a QP requires allocation of a new entry in the AMGM. Signed-off-by: Eli Cohen Signed-off-by: Roland Dreier

IB/mlx4: Add support for resizing CQs

2008-04-17T04:09:33Z

Signed-off-by: Vladimir Sokolovsky Signed-off-by: Roland Dreier