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Message-ID: <PH7PR21MB3263791EA3BCB216183889A8CE4BA@PH7PR21MB3263.namprd21.prod.outlook.com>
Date: Tue, 30 May 2023 18:01:18 +0000
From: Long Li <longli@...rosoft.com>
To: "longli@...uxonhyperv.com" <longli@...uxonhyperv.com>,
Jason Gunthorpe <jgg@...pe.ca>,
Leon Romanovsky <leon@...nel.org>,
Ajay Sharma <sharmaajay@...rosoft.com>,
Dexuan Cui <decui@...rosoft.com>,
KY Srinivasan <kys@...rosoft.com>,
Haiyang Zhang <haiyangz@...rosoft.com>,
Wei Liu <wei.liu@...nel.org>,
"David S. Miller" <davem@...emloft.net>,
Eric Dumazet <edumazet@...gle.com>,
Jakub Kicinski <kuba@...nel.org>,
Paolo Abeni <pabeni@...hat.com>
CC: "linux-rdma@...r.kernel.org" <linux-rdma@...r.kernel.org>,
"linux-hyperv@...r.kernel.org" <linux-hyperv@...r.kernel.org>,
"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH v2] RDMA/mana_ib: Use v2 version of cfg_rx_steer_req to
enable RX coalescing
Hi Leon,
If the v2 version of the patch looks good, can you pick it up for rdma-next?
Thanks,
Long
> -----Original Message-----
> From: longli@...uxonhyperv.com <longli@...uxonhyperv.com>
> Sent: Saturday, May 13, 2023 11:18 PM
> To: Jason Gunthorpe <jgg@...pe.ca>; Leon Romanovsky <leon@...nel.org>;
> Ajay Sharma <sharmaajay@...rosoft.com>; Dexuan Cui
> <decui@...rosoft.com>; KY Srinivasan <kys@...rosoft.com>; Haiyang Zhang
> <haiyangz@...rosoft.com>; Wei Liu <wei.liu@...nel.org>; David S. Miller
> <davem@...emloft.net>; Eric Dumazet <edumazet@...gle.com>; Jakub
> Kicinski <kuba@...nel.org>; Paolo Abeni <pabeni@...hat.com>
> Cc: linux-rdma@...r.kernel.org; linux-hyperv@...r.kernel.org;
> netdev@...r.kernel.org; linux-kernel@...r.kernel.org; Long Li
> <longli@...rosoft.com>
> Subject: [PATCH v2] RDMA/mana_ib: Use v2 version of cfg_rx_steer_req to
> enable RX coalescing
>
> From: Long Li <longli@...rosoft.com>
>
> 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.
>
> Signed-off-by: Long Li <longli@...rosoft.com>
> ---
>
> Change log
> v2: remove the definition of v1 protocol
>
> drivers/infiniband/hw/mana/qp.c | 5 ++++-
> drivers/net/ethernet/microsoft/mana/mana_en.c | 5 ++++-
> include/net/mana/mana.h | 4 +++-
> 3 files changed, 11 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/infiniband/hw/mana/qp.c
> b/drivers/infiniband/hw/mana/qp.c index 54b61930a7fd..4b3b5b274e84
> 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 06d6292e09b3..b3fcb767b9ab 100644
> --- a/drivers/net/ethernet/microsoft/mana/mana_en.c
> +++ b/drivers/net/ethernet/microsoft/mana/mana_en.c
> @@ -972,7 +972,7 @@ 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;
> @@ -987,6 +987,8 @@ 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);
> @@ -996,6 +998,7 @@ 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 cd386aa7c7cc..1512bd48df81 100644
> --- a/include/net/mana/mana.h
> +++ b/include/net/mana/mana.h
> @@ -581,7 +581,7 @@ 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;
> @@ -594,6 +594,8 @@ 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 {
> --
> 2.34.1
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