[PATCH rdma-next v3 2/3] RDMA/mana_ib: Implement uapi to create and destroy RC QP

Konstantin Taranov
2024-05-22T08:24:08Z

Implement user requests to create and destroy an RC QP.
As the user does not have an FMR queue, it is skipped and NO_FMR flag
is used.

Signed-off-by: Konstantin Taranov <kotaranov@microsoft.com>
---
drivers/infiniband/hw/mana/mana_ib.h | 4 ++
drivers/infiniband/hw/mana/qp.c | 94 +++++++++++++++++++++++++++-
include/uapi/rdma/mana-abi.h | 9 +++
3 files changed, 105 insertions(+), 2 deletions(-)

diff --git a/drivers/infiniband/hw/mana/mana_ib.h b/drivers/infiniband/hw/mana/mana_ib.h
index a3e229c83..5cccbe397 100644
--- a/drivers/infiniband/hw/mana/mana_ib.h
+++ b/drivers/infiniband/hw/mana/mana_ib.h
@@ -248,6 +248,10 @@ struct mana_rnic_destroy_cq_resp {
struct gdma_resp_hdr hdr;
}; /* HW Data */

+enum mana_rnic_create_rc_flags {
+ MANA_RC_FLAG_NO_FMR = 2,
+};
+
struct mana_rnic_create_qp_req {
struct gdma_req_hdr hdr;
mana_handle_t adapter;
diff --git a/drivers/infiniband/hw/mana/qp.c b/drivers/infiniband/hw/mana/qp.c
index ba13c5abf..7dbeba41b 100644
--- a/drivers/infiniband/hw/mana/qp.c
+++ b/drivers/infiniband/hw/mana/qp.c
@@ -398,6 +398,78 @@ static int mana_ib_create_qp_raw(struct ib_qp *ibqp, struct ib_pd *ibpd,
return err;
}

+static int mana_ib_create_rc_qp(struct ib_qp *ibqp, struct ib_pd *ibpd,
+ struct ib_qp_init_attr *attr, struct ib_udata *udata)
+{
+ struct mana_ib_dev *mdev = container_of(ibpd->device, struct mana_ib_dev, ib_dev);
+ struct mana_ib_qp *qp = container_of(ibqp, struct mana_ib_qp, ibqp);
+ struct mana_ib_create_rc_qp_resp resp = {};
+ struct mana_ib_ucontext *mana_ucontext;
+ struct mana_ib_create_rc_qp ucmd = {};
+ int i, err, j;
+ u64 flags = 0;
+ u32 doorbell;
+
+ if (!udata || udata->inlen < sizeof(ucmd))
+ return -EINVAL;
+
+ mana_ucontext = rdma_udata_to_drv_context(udata, struct mana_ib_ucontext, ibucontext);
+ doorbell = mana_ucontext->doorbell;
+ flags = MANA_RC_FLAG_NO_FMR;
+ err = ib_copy_from_udata(&ucmd, udata, min(sizeof(ucmd), udata->inlen));
+ if (err) {
+ ibdev_dbg(&mdev->ib_dev, "Failed to copy from udata, %d\n", err);
+ return err;
+ }
+
+ for (i = 0, j = 0; i < MANA_RC_QUEUE_TYPE_MAX; ++i) {
+ /* skip FMR for user-level RC QPs */
+ if (i == MANA_RC_SEND_QUEUE_FMR) {
+ qp->rc_qp.queues[i].id = INVALID_QUEUE_ID;
+ qp->rc_qp.queues[i].gdma_region = GDMA_INVALID_DMA_REGION;
+ continue;
+ }
+ err = mana_ib_create_queue(mdev, ucmd.queue_buf[j], ucmd.queue_size[j],
+ &qp->rc_qp.queues[i]);
+ if (err) {
+ ibdev_err(&mdev->ib_dev, "Failed to create queue %d, err %d\n", i, err);
+ goto destroy_queues;
+ }
+ j++;
+ }
+
+ err = mana_ib_gd_create_rc_qp(mdev, qp, attr, doorbell, flags);
+ if (err) {
+ ibdev_err(&mdev->ib_dev, "Failed to create rc qp %d\n", err);
+ goto destroy_queues;
+ }
+ qp->ibqp.qp_num = qp->rc_qp.queues[MANA_RC_RECV_QUEUE_RESPONDER].id;
+ qp->port = attr->port_num;
+
+ if (udata) {
+ for (i = 0, j = 0; i < MANA_RC_QUEUE_TYPE_MAX; ++i) {
+ if (i == MANA_RC_SEND_QUEUE_FMR)
+ continue;
+ resp.queue_id[j] = qp->rc_qp.queues[i].id;
+ j++;
+ }
+ 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 destroy_qp;
+ }
+ }
+
+ return 0;
+
+destroy_qp:
+ mana_ib_gd_destroy_rc_qp(mdev, qp);
+destroy_queues:
+ while (i-- > 0)
+ mana_ib_destroy_queue(mdev, &qp->rc_qp.queues[i]);
+ return err;
+}
+
int mana_ib_create_qp(struct ib_qp *ibqp, struct ib_qp_init_attr *attr,
struct ib_udata *udata)
{
@@ -409,8 +481,9 @@ int mana_ib_create_qp(struct ib_qp *ibqp, struct ib_qp_init_attr *attr,
udata);

return mana_ib_create_qp_raw(ibqp, ibqp->pd, attr, udata);
+ case IB_QPT_RC:
+ return mana_ib_create_rc_qp(ibqp, ibqp->pd, attr, udata);
default:
- /* Creating QP other than IB_QPT_RAW_PACKET is not supported */
ibdev_dbg(ibqp->device, "Creating QP type %u not supported\n",
attr->qp_type);
}
@@ -473,6 +546,22 @@ static int mana_ib_destroy_qp_raw(struct mana_ib_qp *qp, struct ib_udata *udata)
return 0;
}

+static int mana_ib_destroy_rc_qp(struct mana_ib_qp *qp, struct ib_udata *udata)
+{
+ struct mana_ib_dev *mdev =
+ container_of(qp->ibqp.device, struct mana_ib_dev, ib_dev);
+ int i;
+
+ /* Ignore return code as there is not much we can do about it.
+ * The error message is printed inside.
+ */
+ mana_ib_gd_destroy_rc_qp(mdev, qp);
+ for (i = 0; i < MANA_RC_QUEUE_TYPE_MAX; ++i)
+ mana_ib_destroy_queue(mdev, &qp->rc_qp.queues[i]);
+
+ return 0;
+}
+
int mana_ib_destroy_qp(struct ib_qp *ibqp, struct ib_udata *udata)
{
struct mana_ib_qp *qp = container_of(ibqp, struct mana_ib_qp, ibqp);
@@ -484,7 +573,8 @@ int mana_ib_destroy_qp(struct ib_qp *ibqp, struct ib_udata *udata)
udata);

return mana_ib_destroy_qp_raw(qp, udata);
-
+ case IB_QPT_RC:
+ return mana_ib_destroy_rc_qp(qp, udata);
default:
ibdev_dbg(ibqp->device, "Unexpected QP type %u\n",
ibqp->qp_type);
diff --git a/include/uapi/rdma/mana-abi.h b/include/uapi/rdma/mana-abi.h
index 2c41cc315..45c2df619 100644
--- a/include/uapi/rdma/mana-abi.h
+++ b/include/uapi/rdma/mana-abi.h
@@ -45,6 +45,15 @@ struct mana_ib_create_qp_resp {
__u32 reserved;
};

+struct mana_ib_create_rc_qp {
+ __aligned_u64 queue_buf[4];
+ __u32 queue_size[4];
+};
+
+struct mana_ib_create_rc_qp_resp {
+ __u32 queue_id[4];
+};
+
struct mana_ib_create_wq {
__aligned_u64 wq_buf_addr;
__u32 wq_buf_size;
--
2.43.0