> Subject: [PATCH rdma-next v2 5/5] RDMA/mana_ib: implement uapi for creation
> of rnic cq
>
> From: Konstantin Taranov <kotaranov@xxxxxxxxxxxxx>
>
> Enable users to create RNIC CQs using a corresponding flag.
> With the previous request size, an ethernet CQ is created.
> As a response, return ID of the created CQ.
>
> Signed-off-by: Konstantin Taranov <kotaranov@xxxxxxxxxxxxx>
Reviewed-by: Long Li <longli@xxxxxxxxxxxxx>
> ---
> drivers/infiniband/hw/mana/cq.c | 55 ++++++++++++++++++++++++++++++---
> include/uapi/rdma/mana-abi.h | 12 +++++++
> 2 files changed, 63 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/infiniband/hw/mana/cq.c b/drivers/infiniband/hw/mana/cq.c
> index 688ffe6..c6a3fd5 100644
> --- a/drivers/infiniband/hw/mana/cq.c
> +++ b/drivers/infiniband/hw/mana/cq.c
> @@ -9,17 +9,22 @@ int mana_ib_create_cq(struct ib_cq *ibcq, const struct
> ib_cq_init_attr *attr,
> struct ib_udata *udata)
> {
> struct mana_ib_cq *cq = container_of(ibcq, struct mana_ib_cq, ibcq);
> + struct mana_ib_create_cq_resp resp = {};
> + struct mana_ib_ucontext *mana_ucontext;
> struct ib_device *ibdev = ibcq->device;
> struct mana_ib_create_cq ucmd = {};
> struct mana_ib_dev *mdev;
> + bool is_rnic_cq;
> + u32 doorbell;
> int err;
>
> mdev = container_of(ibdev, struct mana_ib_dev, ib_dev);
>
> - if (udata->inlen < sizeof(ucmd))
> - return -EINVAL;
> -
> cq->comp_vector = attr->comp_vector % ibdev->num_comp_vectors;
> + cq->cq_handle = INVALID_MANA_HANDLE;
> +
> + if (udata->inlen < offsetof(struct mana_ib_create_cq, flags))
> + return -EINVAL;
>
> err = ib_copy_from_udata(&ucmd, udata, min(sizeof(ucmd), udata-
> >inlen));
> if (err) {
> @@ -28,7 +33,9 @@ int mana_ib_create_cq(struct ib_cq *ibcq, const struct
> ib_cq_init_attr *attr,
> return err;
> }
>
> - if (attr->cqe > mdev->adapter_caps.max_qp_wr) {
> + is_rnic_cq = !!(ucmd.flags & MANA_IB_CREATE_RNIC_CQ);
> +
> + if (!is_rnic_cq && attr->cqe > mdev->adapter_caps.max_qp_wr) {
> ibdev_dbg(ibdev, "CQE %d exceeding limit\n", attr->cqe);
> return -EINVAL;
> }
> @@ -40,7 +47,41 @@ int mana_ib_create_cq(struct ib_cq *ibcq, const struct
> ib_cq_init_attr *attr,
> return err;
> }
>
> + mana_ucontext = rdma_udata_to_drv_context(udata, struct
> mana_ib_ucontext,
> + ibucontext);
> + doorbell = mana_ucontext->doorbell;
> +
> + if (is_rnic_cq) {
> + err = mana_ib_gd_create_cq(mdev, cq, doorbell);
> + if (err) {
> + ibdev_dbg(ibdev, "Failed to create RNIC cq, %d\n", err);
> + goto err_destroy_queue;
> + }
> +
> + err = mana_ib_install_cq_cb(mdev, cq);
> + if (err) {
> + ibdev_dbg(ibdev, "Failed to install cq callback, %d\n",
> err);
> + goto err_destroy_rnic_cq;
> + }
> + }
> +
> + resp.cqid = cq->queue.id;
> + err = ib_copy_to_udata(udata, &resp, min(sizeof(resp), udata->outlen));
> + if (err) {
> + ibdev_dbg(&mdev->ib_dev, "Failed to copy to udata, %d\n", err);
> + goto err_remove_cq_cb;
> + }
> +
> return 0;
> +
> +err_remove_cq_cb:
> + mana_ib_remove_cq_cb(mdev, cq);
> +err_destroy_rnic_cq:
> + mana_ib_gd_destroy_cq(mdev, cq);
> +err_destroy_queue:
> + mana_ib_destroy_queue(mdev, &cq->queue);
> +
> + return err;
> }
>
> int mana_ib_destroy_cq(struct ib_cq *ibcq, struct ib_udata *udata) @@ -52,6
> +93,12 @@ int mana_ib_destroy_cq(struct ib_cq *ibcq, struct ib_udata *udata)
> mdev = container_of(ibdev, struct mana_ib_dev, ib_dev);
>
> mana_ib_remove_cq_cb(mdev, cq);
> +
> + /* Ignore return code as there is not much we can do about it.
> + * The error message is printed inside.
> + */
> + mana_ib_gd_destroy_cq(mdev, cq);
> +
> mana_ib_destroy_queue(mdev, &cq->queue);
>
> return 0;
> diff --git a/include/uapi/rdma/mana-abi.h b/include/uapi/rdma/mana-abi.h
> index 5fcb31b..2c41cc3 100644
> --- a/include/uapi/rdma/mana-abi.h
> +++ b/include/uapi/rdma/mana-abi.h
> @@ -16,8 +16,20 @@
>
> #define MANA_IB_UVERBS_ABI_VERSION 1
>
> +enum mana_ib_create_cq_flags {
> + MANA_IB_CREATE_RNIC_CQ = 1 << 0,
> +};
> +
> struct mana_ib_create_cq {
> __aligned_u64 buf_addr;
> + __u16 flags;
> + __u16 reserved0;
> + __u32 reserved1;
> +};
> +
> +struct mana_ib_create_cq_resp {
> + __u32 cqid;
> + __u32 reserved;
> };
>
> struct mana_ib_create_qp {
> --
> 2.43.0
