Commit 3ff81e82 authored by Xiao Yang's avatar Xiao Yang Committed by Jason Gunthorpe
Browse files

RDMA: Extend RDMA kernel ABI to support atomic write 

1) Define new atomic write request/completion in kernel.
2) Define new atomic write capability in kernel.
3) Define new atomic write opcode for RC service in packet.

Link: https://lore.kernel.org/r/1669905432-14-3-git-send-email-yangx.jy@fujitsu.com


Signed-off-by: default avatarXiao Yang <yangx.jy@fujitsu.com>
Signed-off-by: default avatarJason Gunthorpe <jgg@nvidia.com>
parent efa2afc3

include/rdma/ib_pack.h

+2 −0
Original line number Diff line number Diff line
@@ -84,6 +84,7 @@ enum { 
	/* opcode 0x15 is reserved */

	IB_OPCODE_SEND_LAST_WITH_INVALIDATE         = 0x16,

	IB_OPCODE_SEND_ONLY_WITH_INVALIDATE         = 0x17,

	IB_OPCODE_ATOMIC_WRITE                      = 0x1D,



	/* real constants follow -- see comment about above IB_OPCODE()

	   macro for more details */
@@ -112,6 +113,7 @@ enum { 
	IB_OPCODE(RC, FETCH_ADD),

	IB_OPCODE(RC, SEND_LAST_WITH_INVALIDATE),

	IB_OPCODE(RC, SEND_ONLY_WITH_INVALIDATE),

	IB_OPCODE(RC, ATOMIC_WRITE),



	/* UC */

	IB_OPCODE(UC, SEND_FIRST),

include/rdma/ib_verbs.h

+3 −0
Original line number Diff line number Diff line
@@ -270,6 +270,7 @@ enum ib_device_cap_flags { 
	/* The device supports padding incoming writes to cacheline. */

	IB_DEVICE_PCI_WRITE_END_PADDING =

		IB_UVERBS_DEVICE_PCI_WRITE_END_PADDING,

	IB_DEVICE_ATOMIC_WRITE = IB_UVERBS_DEVICE_ATOMIC_WRITE,

};



enum ib_kernel_cap_flags {
@@ -982,6 +983,7 @@ enum ib_wc_opcode { 
	IB_WC_BIND_MW = IB_UVERBS_WC_BIND_MW,

	IB_WC_LOCAL_INV = IB_UVERBS_WC_LOCAL_INV,

	IB_WC_LSO = IB_UVERBS_WC_TSO,

	IB_WC_ATOMIC_WRITE = IB_UVERBS_WC_ATOMIC_WRITE,

	IB_WC_REG_MR,

	IB_WC_MASKED_COMP_SWAP,

	IB_WC_MASKED_FETCH_ADD,
@@ -1325,6 +1327,7 @@ enum ib_wr_opcode { 
		IB_UVERBS_WR_MASKED_ATOMIC_CMP_AND_SWP,

	IB_WR_MASKED_ATOMIC_FETCH_AND_ADD =

		IB_UVERBS_WR_MASKED_ATOMIC_FETCH_AND_ADD,

	IB_WR_ATOMIC_WRITE = IB_UVERBS_WR_ATOMIC_WRITE,



	/* These are kernel only and can not be issued by userspace */

	IB_WR_REG_MR = 0x20,