This is a note to let you know that I've just added the patch titled
RDMA/mana_ib: Use v2 version of cfg_rx_steer_req to enable RX coalescing
to the 6.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
rdma-mana_ib-use-v2-version-of-cfg_rx_steer_req-to-e.patch
and it can be found in the queue-6.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit e444d3b6dfa3c502e8693f4a2dcf48d382e0f98d
Author: Long Li <longli@xxxxxxxxxxxxx>
Date: Sat May 13 23:18:15 2023 -0700
RDMA/mana_ib: Use v2 version of cfg_rx_steer_req to enable RX coalescing
[ Upstream commit 2145328515c8fa9b8a9f7889250bc6c032f2a0e6 ]
With RX coalescing, one CQE entry can be used to indicate multiple packets
on the receive queue. This saves processing time and PCI bandwidth over
the CQ.
The MANA Ethernet driver also uses the v2 version of the protocol. It
doesn't use RX coalescing and its behavior is not changed.
Link: https://lore.kernel.org/r/1684045095-31228-1-git-send-email-longli@xxxxxxxxxxxxxxxxx
Signed-off-by: Long Li <longli@xxxxxxxxxxxxx>
Signed-off-by: Jason Gunthorpe <jgg@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/infiniband/hw/mana/qp.c b/drivers/infiniband/hw/mana/qp.c
index 54b61930a7fdb..4b3b5b274e849 100644
--- a/drivers/infiniband/hw/mana/qp.c
+++ b/drivers/infiniband/hw/mana/qp.c
@@ -13,7 +13,7 @@ static int mana_ib_cfg_vport_steering(struct mana_ib_dev *dev,
u8 *rx_hash_key)
{
struct mana_port_context *mpc = netdev_priv(ndev);
- struct mana_cfg_rx_steer_req *req = NULL;
+ struct mana_cfg_rx_steer_req_v2 *req;
struct mana_cfg_rx_steer_resp resp = {};
mana_handle_t *req_indir_tab;
struct gdma_context *gc;
@@ -33,6 +33,8 @@ static int mana_ib_cfg_vport_steering(struct mana_ib_dev *dev,
mana_gd_init_req_hdr(&req->hdr, MANA_CONFIG_VPORT_RX, req_buf_size,
sizeof(resp));
+ req->hdr.req.msg_version = GDMA_MESSAGE_V2;
+
req->vport = mpc->port_handle;
req->rx_enable = 1;
req->update_default_rxobj = 1;
@@ -46,6 +48,7 @@ static int mana_ib_cfg_vport_steering(struct mana_ib_dev *dev,
req->num_indir_entries = MANA_INDIRECT_TABLE_SIZE;
req->indir_tab_offset = sizeof(*req);
req->update_indir_tab = true;
+ req->cqe_coalescing_enable = 1;
req_indir_tab = (mana_handle_t *)(req + 1);
/* The ind table passed to the hardware must have
diff --git a/drivers/net/ethernet/microsoft/mana/mana_en.c b/drivers/net/ethernet/microsoft/mana/mana_en.c
index 96c78f7db2543..7441577294bad 100644
--- a/drivers/net/ethernet/microsoft/mana/mana_en.c
+++ b/drivers/net/ethernet/microsoft/mana/mana_en.c
@@ -973,7 +973,7 @@ static int mana_cfg_vport_steering(struct mana_port_context *apc,
bool update_tab)
{
u16 num_entries = MANA_INDIRECT_TABLE_SIZE;
- struct mana_cfg_rx_steer_req *req = NULL;
+ struct mana_cfg_rx_steer_req_v2 *req;
struct mana_cfg_rx_steer_resp resp = {};
struct net_device *ndev = apc->ndev;
mana_handle_t *req_indir_tab;
@@ -988,6 +988,8 @@ static int mana_cfg_vport_steering(struct mana_port_context *apc,
mana_gd_init_req_hdr(&req->hdr, MANA_CONFIG_VPORT_RX, req_buf_size,
sizeof(resp));
+ req->hdr.req.msg_version = GDMA_MESSAGE_V2;
+
req->vport = apc->port_handle;
req->num_indir_entries = num_entries;
req->indir_tab_offset = sizeof(*req);
@@ -997,6 +999,7 @@ static int mana_cfg_vport_steering(struct mana_port_context *apc,
req->update_hashkey = update_key;
req->update_indir_tab = update_tab;
req->default_rxobj = apc->default_rxobj;
+ req->cqe_coalescing_enable = 0;
if (update_key)
memcpy(&req->hashkey, apc->hashkey, MANA_HASH_KEY_SIZE);
diff --git a/include/net/mana/mana.h b/include/net/mana/mana.h
index 9eef199728454..024ad8ddb27e5 100644
--- a/include/net/mana/mana.h
+++ b/include/net/mana/mana.h
@@ -579,7 +579,7 @@ struct mana_fence_rq_resp {
}; /* HW DATA */
/* Configure vPort Rx Steering */
-struct mana_cfg_rx_steer_req {
+struct mana_cfg_rx_steer_req_v2 {
struct gdma_req_hdr hdr;
mana_handle_t vport;
u16 num_indir_entries;
@@ -592,6 +592,8 @@ struct mana_cfg_rx_steer_req {
u8 reserved;
mana_handle_t default_rxobj;
u8 hashkey[MANA_HASH_KEY_SIZE];
+ u8 cqe_coalescing_enable;
+ u8 reserved2[7];
}; /* HW DATA */
struct mana_cfg_rx_steer_resp {
