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RDMA//rxe: Optimize send path in rxe_resp.c

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Bypass calling check_rkey() in rxe_resp.c for non-rdma messages.

Link: https://lore.kernel.org/r/20230530221334.89432-3-rpearsonhpe@gmail.com
Signed-off-by: Bob Pearson <rpearsonhpe@gmail.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
This commit is contained in:
Bob Pearson 2023-05-30 17:13:31 -05:00 committed by Jason Gunthorpe
parent d11442c6bd
commit 2a129958bd
2 changed files with 13 additions and 2 deletions
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3
drivers/infiniband/sw/rxe/rxe_opcode.h
View file

@ -91,6 +91,9 @@ enum rxe_hdr_mask {
RXE_READ_OR_ATOMIC_MASK = (RXE_READ_MASK | RXE_ATOMIC_MASK),
RXE_WRITE_OR_SEND_MASK = (RXE_WRITE_MASK | RXE_SEND_MASK),
RXE_READ_OR_WRITE_MASK = (RXE_READ_MASK | RXE_WRITE_MASK),
RXE_RDMA_OP_MASK = (RXE_READ_MASK | RXE_WRITE_MASK |
RXE_ATOMIC_WRITE_MASK | RXE_FLUSH_MASK |
RXE_ATOMIC_MASK),
};
#define OPCODE_NONE (-1)

12
drivers/infiniband/sw/rxe/rxe_resp.c
View file

@ -387,7 +387,10 @@ static enum resp_states rxe_resp_check_length(struct rxe_qp *qp,
}
}
return RESPST_CHK_RKEY;
if (pkt->mask & RXE_RDMA_OP_MASK)
return RESPST_CHK_RKEY;
else
return RESPST_EXECUTE;
}
/* if the reth length field is zero we can assume nothing
@ -434,6 +437,10 @@ static enum resp_states check_rkey(struct rxe_qp *qp,
enum resp_states state;
int access = 0;
/* parse RETH or ATMETH header for first/only packets
* for va, length, rkey, etc. or use current value for
* middle/last packets.
*/
if (pkt->mask & (RXE_READ_OR_WRITE_MASK | RXE_ATOMIC_WRITE_MASK)) {
if (pkt->mask & RXE_RETH_MASK)
qp_resp_from_reth(qp, pkt);
@ -454,7 +461,8 @@ static enum resp_states check_rkey(struct rxe_qp *qp,
qp_resp_from_atmeth(qp, pkt);
access = IB_ACCESS_REMOTE_ATOMIC;
} else {
return RESPST_EXECUTE;
/* shouldn't happen */
WARN_ON(1);
}
/* A zero-byte read or write op is not required to