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IB: start documenting device capabilities

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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>
This commit is contained in:
Christoph Hellwig 2015-12-23 19:12:45 +01:00 committed by Doug Ledford
parent 432c55fff4
commit b1adc7146a
1 changed files with 18 additions and 0 deletions
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18
include/rdma/ib_verbs.h
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@ -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),