Re: [PATCH rdma-next v2 5/5] RDMA/mana_ib: Adding and deleting GIDs

[Leon Romanovsky <leon@kernel.org>]

On Fri, Feb 02, 2024 at 07:06:37AM -0800, Konstantin Taranov wrote:
> Implement add_gid and del_gid for RNIC.
> We support ipv4 and ipv6 addresses.
> 
> Signed-off-by: Konstantin Taranov <kotaranov@linux.microsoft.com>
> ---
>  drivers/infiniband/hw/mana/device.c  |  2 ++
>  drivers/infiniband/hw/mana/main.c    | 66 ++++++++++++++++++++++++++++++++++++
>  drivers/infiniband/hw/mana/mana_ib.h | 37 ++++++++++++++++++++
>  3 files changed, 105 insertions(+)
> 
> diff --git a/drivers/infiniband/hw/mana/device.c b/drivers/infiniband/hw/mana/device.c
> index 2b362f5..9fb515b 100644
> --- a/drivers/infiniband/hw/mana/device.c
> +++ b/drivers/infiniband/hw/mana/device.c
> @@ -15,6 +15,7 @@
>  	.driver_id = RDMA_DRIVER_MANA,
>  	.uverbs_abi_ver = MANA_IB_UVERBS_ABI_VERSION,
>  
> +	.add_gid = mana_ib_gd_add_gid,
>  	.alloc_pd = mana_ib_alloc_pd,
>  	.alloc_ucontext = mana_ib_alloc_ucontext,
>  	.create_cq = mana_ib_create_cq,
> @@ -23,6 +24,7 @@
>  	.create_wq = mana_ib_create_wq,
>  	.dealloc_pd = mana_ib_dealloc_pd,
>  	.dealloc_ucontext = mana_ib_dealloc_ucontext,
> +	.del_gid = mana_ib_gd_del_gid,
>  	.dereg_mr = mana_ib_dereg_mr,
>  	.destroy_cq = mana_ib_destroy_cq,
>  	.destroy_qp = mana_ib_destroy_qp,
> diff --git a/drivers/infiniband/hw/mana/main.c b/drivers/infiniband/hw/mana/main.c
> index 645abf3..282c024 100644
> --- a/drivers/infiniband/hw/mana/main.c
> +++ b/drivers/infiniband/hw/mana/main.c
> @@ -675,3 +675,69 @@ void mana_ib_gd_destroy_rnic_adapter(struct mana_ib_dev *mdev)
>  	mdev->adapter_handle = INVALID_MANA_HANDLE;
>  	mana_ib_destroy_eqs(mdev);
>  }
> +
> +int mana_ib_gd_add_gid(const struct ib_gid_attr *attr, void **context)
> +{
> +	struct mana_ib_dev *mdev = container_of(attr->device, struct mana_ib_dev, ib_dev);
> +	enum rdma_network_type ntype = rdma_gid_attr_network_type(attr);
> +	struct mana_rnic_config_addr_resp resp = {};
> +	struct gdma_context *gc = mdev_to_gc(mdev);
> +	struct mana_rnic_config_addr_req req = {};
> +	int err;
> +
> +	if (!rnic_is_enabled(mdev))
> +		return -EINVAL;

Set .add_gid./del_gid callbacks only when RNIC is enabled.
ib_set_device_ops() allows partial set of the callbacks.

> +
> +	if (ntype != RDMA_NETWORK_IPV4 && ntype != RDMA_NETWORK_IPV6) {
> +		ibdev_dbg(&mdev->ib_dev, "Unsupported rdma network type %d", ntype);
> +		return -EINVAL;
> +	}
> +
> +	mana_gd_init_req_hdr(&req.hdr, MANA_IB_CONFIG_IP_ADDR, sizeof(req), sizeof(resp));
> +	req.hdr.dev_id = gc->mana_ib.dev_id;
> +	req.adapter = mdev->adapter_handle;
> +	req.op = ADDR_OP_ADD;
> +	req.sgid_type = (ntype == RDMA_NETWORK_IPV6) ? SGID_TYPE_IPV6 : SGID_TYPE_IPV4;
> +	copy_in_reverse(req.ip_addr, attr->gid.raw, sizeof(union ib_gid));
> +
> +	err = mana_gd_send_request(gc, sizeof(req), &req, sizeof(resp), &resp);
> +	if (err) {
> +		ibdev_err(&mdev->ib_dev, "Failed to config IP addr err %d\n", err);
> +		return err;
> +	}
> +
> +	return 0;
> +}
> +
> +int mana_ib_gd_del_gid(const struct ib_gid_attr *attr, void **context)
> +{
> +	struct mana_ib_dev *mdev = container_of(attr->device, struct mana_ib_dev, ib_dev);
> +	enum rdma_network_type ntype = rdma_gid_attr_network_type(attr);
> +	struct mana_rnic_config_addr_resp resp = {};
> +	struct gdma_context *gc = mdev_to_gc(mdev);
> +	struct mana_rnic_config_addr_req req = {};
> +	int err;
> +
> +	if (!rnic_is_enabled(mdev))
> +		return -EINVAL;
> +
> +	if (ntype != RDMA_NETWORK_IPV4 && ntype != RDMA_NETWORK_IPV6) {
> +		ibdev_dbg(&mdev->ib_dev, "Unsupported rdma network type %d", ntype);
> +		return -EINVAL;
> +	}
> +
> +	mana_gd_init_req_hdr(&req.hdr, MANA_IB_CONFIG_IP_ADDR, sizeof(req), sizeof(resp));
> +	req.hdr.dev_id = gc->mana_ib.dev_id;
> +	req.adapter = mdev->adapter_handle;
> +	req.op = ADDR_OP_REMOVE;
> +	req.sgid_type = (ntype == RDMA_NETWORK_IPV6) ? SGID_TYPE_IPV6 : SGID_TYPE_IPV4;
> +	copy_in_reverse(req.ip_addr, attr->gid.raw, sizeof(union ib_gid));
> +
> +	err = mana_gd_send_request(gc, sizeof(req), &req, sizeof(resp), &resp);
> +	if (err) {
> +		ibdev_err(&mdev->ib_dev, "Failed to config IP addr err %d\n", err);
> +		return err;
> +	}
> +
> +	return 0;
> +}
> diff --git a/drivers/infiniband/hw/mana/mana_ib.h b/drivers/infiniband/hw/mana/mana_ib.h
> index 196f3c8..2a3e3b0 100644
> --- a/drivers/infiniband/hw/mana/mana_ib.h
> +++ b/drivers/infiniband/hw/mana/mana_ib.h
> @@ -118,6 +118,7 @@ enum mana_ib_command_code {
>  	MANA_IB_GET_ADAPTER_CAP = 0x30001,
>  	MANA_IB_CREATE_ADAPTER  = 0x30002,
>  	MANA_IB_DESTROY_ADAPTER = 0x30003,
> +	MANA_IB_CONFIG_IP_ADDR	= 0x30004,
>  };
>  
>  struct mana_ib_query_adapter_caps_req {
> @@ -167,6 +168,30 @@ struct mana_rnic_destroy_adapter_resp {
>  	struct gdma_resp_hdr hdr;
>  }; /* HW Data */
>  
> +enum mana_ib_addr_op {
> +	ADDR_OP_ADD = 1,
> +	ADDR_OP_REMOVE,
> +};
> +
> +enum sgid_entry_type {
> +	SGID_TYPE_INVALID = 0,
> +	SGID_TYPE_IPV4 = 1,
> +	SGID_TYPE_IPV6 = 2,
> +	SGID_TYPE_HYBRID = 3

This is not used, please remove it.

Thanks