diff options
| author | Mike Marciniszyn <mike.marciniszyn@qlogic.com> | 2011-09-23 13:16:39 -0400 |
|---|---|---|
| committer | Roland Dreier <roland@purestorage.com> | 2011-10-21 09:38:52 -0700 |
| commit | 9e1c0e43257b6df1ef012dd37c3f0f93b1ee47af (patch) | |
| tree | be40833860d385491b1ac8fa13dffe414954ee76 /drivers/infiniband/hw/qib/qib.h | |
| parent | cc6ea1385b43487f6ef03bdc91416c8366d28311 (diff) | |
| download | linux-9e1c0e43257b6df1ef012dd37c3f0f93b1ee47af.tar.bz2 | |
IB/qib: Eliminate divide/mod in converting idx to egr buf pointer
The context init now saves a shift from rcvegrbufs_perchunk
rcvegrbufs_perchunk_shift using ilog2. A BUG_ON() protects the
power of 2 assumption.
Signed-off-by: Mike Marciniszyn <mike.marciniszyn@qlogic.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
Diffstat (limited to 'drivers/infiniband/hw/qib/qib.h')
| -rw-r--r-- | drivers/infiniband/hw/qib/qib.h | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/drivers/infiniband/hw/qib/qib.h b/drivers/infiniband/hw/qib/qib.h index ee993e725d38..97e623383e1a 100644 --- a/drivers/infiniband/hw/qib/qib.h +++ b/drivers/infiniband/hw/qib/qib.h @@ -171,7 +171,9 @@ struct qib_ctxtdata { /* how many alloc_pages() chunks in rcvegrbuf_pages */ u32 rcvegrbuf_chunks; /* how many egrbufs per chunk */ - u32 rcvegrbufs_perchunk; + u16 rcvegrbufs_perchunk; + /* ilog2 of above */ + u16 rcvegrbufs_perchunk_shift; /* order for rcvegrbuf_pages */ size_t rcvegrbuf_size; /* rcvhdrq size (for freeing) */ @@ -940,7 +942,9 @@ struct qib_devdata { /* chip address space used by 4k pio buffers */ u32 align4k; /* size of each rcvegrbuffer */ - u32 rcvegrbufsize; + u16 rcvegrbufsize; + /* log2 of above */ + u16 rcvegrbufsize_shift; /* localbus width (1, 2,4,8,16,32) from config space */ u32 lbus_width; /* localbus speed in MHz */ |