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[PATCH] IB/mthca: add fast memory region implementation

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Implement fast memory regions (FMRs), where the driver writes directly into
the HCA's translation tables rather than requiring a firmware command.  For
Tavor, MTTs for FMR are separate from regular MTTs, and are reserved at driver
initialization.  This is done to limit the amount of virtual memory needed to
map the MTTs.  For Arbel, there's no such limitation, and all MTTs and MPTs
may be used for FMR or for regular MR.

Signed-off-by: Michael S. Tsirkin <mst@mellanox.co.il>
Signed-off-by: Roland Dreier <roland@topspin.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Michael S. Tsirkin
2005-04-16 15:26:30 -07:00
committed by Linus Torvalds
parent d0a9d25cdc
commit e0f5fdca1c
7 changed files with 528 additions and 26 deletions
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drivers/infiniband/hw/mthca/mthca_profile.h
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@ -48,6 +48,7 @@ struct mthca_profile {
int num_udav;
int num_uar;
int uarc_size;
int fmr_reserved_mtts;
};
u64 mthca_make_profile(struct mthca_dev *mdev,