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| author | Christoph Hellwig <hch@lst.de> | 2015-12-23 19:12:45 +0100 |
|---|---|---|
| committer | Doug Ledford <dledford@redhat.com> | 2015-12-23 14:29:03 -0500 |
| commit | b1adc7146af54487bb2ce1cb3012e66a1bbd8e39 (patch) | |
| tree | 5f4e0a36f80924d829db64fa9559b7d4bc7cd640 /include/rdma | |
| parent | 432c55fff402da3ad7716485e30e8c05010cfe68 (diff) | |
| download | linux-b1adc7146af54487bb2ce1cb3012e66a1bbd8e39.tar.gz linux-b1adc7146af54487bb2ce1cb3012e66a1bbd8e39.tar.bz2 linux-b1adc7146af54487bb2ce1cb3012e66a1bbd8e39.zip | |
IB: start documenting device capabilities
Just IB_DEVICE_LOCAL_DMA_LKEY and IB_DEVICE_MEM_MGT_EXTENSIONS for now
as I'm most familar with those.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Sagi Grimberg <sagig@mellanox.com>
Reviewed-By: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
Diffstat (limited to 'include/rdma')
| -rw-r--r-- | include/rdma/ib_verbs.h | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/include/rdma/ib_verbs.h b/include/rdma/ib_verbs.h index 368fc22f30f1..f06ce80f12e3 100644 --- a/include/rdma/ib_verbs.h +++ b/include/rdma/ib_verbs.h @@ -162,6 +162,14 @@ enum ib_device_cap_flags { IB_DEVICE_RC_RNR_NAK_GEN = (1<<12), IB_DEVICE_SRQ_RESIZE = (1<<13), IB_DEVICE_N_NOTIFY_CQ = (1<<14), + + /* + * This device supports a per-device lkey or stag that can be + * used without performing a memory registration for the local + * memory. Note that ULPs should never check this flag, but + * instead of use the local_dma_lkey flag in the ib_pd structure, + * which will always contain a usable lkey. + */ IB_DEVICE_LOCAL_DMA_LKEY = (1<<15), IB_DEVICE_RESERVED = (1<<16), /* old SEND_W_INV */ IB_DEVICE_MEM_WINDOW = (1<<17), @@ -175,6 +183,16 @@ enum ib_device_cap_flags { IB_DEVICE_UD_IP_CSUM = (1<<18), IB_DEVICE_UD_TSO = (1<<19), IB_DEVICE_XRC = (1<<20), + + /* + * This device supports the IB "base memory management extension", + * which includes support for fast registrations (IB_WR_REG_MR, + * IB_WR_LOCAL_INV and IB_WR_SEND_WITH_INV verbs). This flag should + * also be set by any iWarp device which must support FRs to comply + * to the iWarp verbs spec. iWarp devices also support the + * IB_WR_RDMA_READ_WITH_INV verb for RDMA READs that invalidate the + * stag. + */ IB_DEVICE_MEM_MGT_EXTENSIONS = (1<<21), IB_DEVICE_BLOCK_MULTICAST_LOOPBACK = (1<<22), IB_DEVICE_MEM_WINDOW_TYPE_2A = (1<<23), |