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Commit b1adc714 authored by Christoph Hellwig's avatar Christoph Hellwig Committed by Doug Ledford
Browse files

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: default avatarChristoph Hellwig <hch@lst.de>
Reviewed-by: default avatarSagi Grimberg <sagig@mellanox.com>
Reviewed-By: default avatarJason Gunthorpe <jgunthorpe@obsidianresearch.com>
Signed-off-by: default avatarDoug Ledford <dledford@redhat.com>
parent 432c55ff

include/rdma/ib_verbs.h

+18 −0
Original line number Diff line number Diff line
@@ -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),