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[for-next,v6,2/6] RDMA/rxe: Change AH objects to indexed

Message ID 20211007204051.10086-3-rpearsonhpe@gmail.com (mailing list archive)
State Accepted
Delegated to: Jason Gunthorpe
Headers show
Series Replace AV by AH in UD sends | expand

Commit Message

Bob Pearson Oct. 7, 2021, 8:40 p.m. UTC 
Make changes to rxe_param.h and rxe_pool.c to allow indexing of AH
objects. Valid indices are non-zero so older providers can be detected.

Signed-off-by: Bob Pearson <rpearsonhpe@gmail.com>
---
v6:
  Reduced the max number of AH to 32K to limit the size of the
  index bit map.
---
 drivers/infiniband/sw/rxe/rxe_param.h | 4 +++-
 drivers/infiniband/sw/rxe/rxe_pool.c  | 4 +++-
 2 files changed, 6 insertions(+), 2 deletions(-)
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Patch

diff --git a/drivers/infiniband/sw/rxe/rxe_param.h b/drivers/infiniband/sw/rxe/rxe_param.h
index aeffaef8f381..918270e34a35 100644
--- a/drivers/infiniband/sw/rxe/rxe_param.h
+++ b/drivers/infiniband/sw/rxe/rxe_param.h
@@ -69,7 +69,9 @@  enum rxe_device_param {
 	RXE_MAX_MCAST_GRP		= 8192,
 	RXE_MAX_MCAST_QP_ATTACH		= 56,
 	RXE_MAX_TOT_MCAST_QP_ATTACH	= 0x70000,
-	RXE_MAX_AH			= DEFAULT_MAX_VALUE,
+	RXE_MAX_AH			= (1<<15) - 1,	/* 32Ki - 1 */
+	RXE_MIN_AH_INDEX		= 1,
+	RXE_MAX_AH_INDEX		= RXE_MAX_AH,
 	RXE_MAX_SRQ_WR			= DEFAULT_MAX_VALUE,
 	RXE_MIN_SRQ_WR			= 1,
 	RXE_MAX_SRQ_SGE			= 27,
diff --git a/drivers/infiniband/sw/rxe/rxe_pool.c b/drivers/infiniband/sw/rxe/rxe_pool.c
index ffa8420b4765..7b4cb46edfd9 100644
--- a/drivers/infiniband/sw/rxe/rxe_pool.c
+++ b/drivers/infiniband/sw/rxe/rxe_pool.c
@@ -26,7 +26,9 @@  struct rxe_type_info rxe_type_info[RXE_NUM_TYPES] = {
 		.name		= "rxe-ah",
 		.size		= sizeof(struct rxe_ah),
 		.elem_offset	= offsetof(struct rxe_ah, pelem),
-		.flags		= RXE_POOL_NO_ALLOC,
+		.flags		= RXE_POOL_INDEX | RXE_POOL_NO_ALLOC,
+		.min_index	= RXE_MIN_AH_INDEX,
+		.max_index	= RXE_MAX_AH_INDEX,
 	},
 	[RXE_TYPE_SRQ] = {
 		.name		= "rxe-srq",