linux-toradex.git/include/linux/mlx4, branch v2.6.25-rc2

IB/mlx4: Use multiple WQ blocks to post smaller send WQEs

2008-02-08T21:30:02+00:00

ConnectX HCA supports shrinking WQEs, so that a single work request
can be made of multiple units of wqe_shift.  This way, WRs can differ
in size, and do not have to be a power of 2 in size, saving memory and
speeding up send WR posting.  Unfortunately, if we do this then the
wqe_index field in CQEs can't be used to look up the WR ID anymore, so
our implementation does this only if selective signaling is off.

Further, on 32-bit platforms, we can't use vmap() to make the QP
buffer virtually contigious. Thus we have to use constant-sized WRs to
make sure a WR is always fully within a single page-sized chunk.

Finally, we use WRs with the NOP opcode to avoid wrapping around the
queue buffer in the middle of posting a WR, and we set the
NoErrorCompletion bit to avoid getting completions with error for NOP
WRs.  However, NEC is only supported starting with firmware 2.2.232,
so we use constant-sized WRs for older firmware.  And, since MLX QPs
only support SEND, we use constant-sized WRs in this case.

When stamping during NOP posting, do stamping following setting of the
NOP WQE valid bit.

Signed-off-by: Michael S. Tsirkin 
Signed-off-by: Jack Morgenstein 
Signed-off-by: Roland Dreier

mlx4_core: Clean up struct mlx4_buf

2008-02-07T05:17:59+00:00

Now that struct mlx4_buf.u is a struct instead of a union because of
the vmap() changes, there's no point in having a struct at all.  So
move .direct and .page_list directly into struct mlx4_buf and get rid
of a bunch of unnecessary ".u"s.

Signed-off-by: Roland Dreier

mlx4_core: For 64-bit systems, vmap() kernel queue buffers

2008-02-07T05:17:45+00:00

Since kernel virtual memory is not a problem on 64-bit systems, there
is no reason to use our own 2-layer page mapping scheme for large
kernel queue buffers on such systems.  Instead, map the page list to a
single virtually contiguous buffer with vmap(), so that can we access
buffer memory via direct indexing.

Signed-off-by: Michael S. Tsirkin 
Signed-off-by: Jack Morgenstein 
Signed-off-by: Roland Dreier

IB/mlx4: Consolidate code to get an entry from a struct mlx4_buf

2008-02-07T05:07:54+00:00

We use struct mlx4_buf for kernel QP, CQ and SRQ buffers, and the code
to look up an entry is duplicated in get_cqe_from_buf() and the QP and
SRQ versions of get_wqe().  Factor this out into mlx4_buf_offset().

This will also make it easier to switch over to using vmap() for buffers.

Signed-off-by: Roland Dreier

mlx4_core: Kill mlx4_write64_raw()

2007-10-15T03:17:39+00:00

    
It's a leftover from development that's never used in the real driver.

Signed-off-by: Roland Dreier

IB/mlx4: Implement FMRs

2007-10-10T02:59:16+00:00

Implement FMRs for mlx4.  This is an adaptation of code from mthca.

Signed-off-by: Jack Morgenstein 
Signed-off-by: Michael S. Tsirkin 
Signed-off-by: Roland Dreier

IB/mlx4: Display misc device information under /sys/class/infiniband/

2007-10-10T02:59:14+00:00

display the following device information under /sys/class/infiniband/mlx4_X:
board_id, fw_ver, hw_rev, hca_type.

This patch makes this information available to userspace utilities
such as ibstat and ibv_devinfo.

Signed-off-by: Jack Morgenstein 
Signed-off-by: Roland Dreier

IB/mlx4: Implement query SRQ

2007-07-12T22:41:24+00:00

Signed-off-by: Dotan Barak 
Signed-off-by: Jack Morgenstein 
Signed-off-by: Roland Dreier

IB/mlx4: Implement query QP

2007-07-12T22:41:00+00:00

Signed-off-by: Jack Morgenstein 
Signed-off-by: Roland Dreier

mlx4_core: Get the maximum message size from reported device capabilities

2007-07-10T03:12:26+00:00

Get the maximum message size from the device capabilities returned
from the QUERY_DEV_CAP firmware command, rather than hard-coding 2 GB.

Signed-off-by: Dotan Barak 
Signed-off-by: Michael S. Tsirkin 
Signed-off-by: Roland Dreier