> Subject: Re: [Patch v4 12/12] RDMA/mana_ib: Add a driver for Microsoft
> Azure Network Adapter
>
>
>
> On 6/16/22 10:07 AM, longli@xxxxxxxxxxxxxxxxx wrote:
> > From: Long Li <longli@xxxxxxxxxxxxx>
> >
>
> <...>
>
> > +
> > +static int mana_ib_create_qp_raw(struct ib_qp *ibqp, struct ib_pd *ibpd,
> > + struct ib_qp_init_attr *attr,
> > + struct ib_udata *udata)
> > +{
> > + struct mana_ib_pd *pd = container_of(ibpd, struct mana_ib_pd,
> ibpd);
> > + struct mana_ib_qp *qp = container_of(ibqp, struct mana_ib_qp,
> ibqp);
> > + struct mana_ib_dev *mdev =
> > + container_of(ibpd->device, struct mana_ib_dev, ib_dev);
> > + struct mana_ib_cq *send_cq =
> > + container_of(attr->send_cq, struct mana_ib_cq, ibcq);
> > + struct ib_ucontext *ib_ucontext = ibpd->uobject->context;
> > + struct mana_ib_create_qp_resp resp = {};
> > + struct mana_ib_ucontext *mana_ucontext;
> > + struct gdma_dev *gd = mdev->gdma_dev;
> > + struct mana_ib_create_qp ucmd = {};
> > + struct mana_obj_spec wq_spec = {};
> > + struct mana_obj_spec cq_spec = {};
> > + struct mana_port_context *mpc;
> > + struct mana_context *mc;
> > + struct net_device *ndev;
> > + struct ib_umem *umem;
> > + int err;
> > + u32 port;
> > +
> > + mana_ucontext =
> > + container_of(ib_ucontext, struct mana_ib_ucontext,
> ibucontext);
> > + mc = gd->driver_data;
> > +
> > + if (udata->inlen < sizeof(ucmd))
> > + return -EINVAL;
> > +
> > + err = ib_copy_from_udata(&ucmd, udata, min(sizeof(ucmd), udata-
> >inlen));
> > + if (err) {
> > + ibdev_dbg(&mdev->ib_dev,
> > + "Failed to copy from udata create qp-raw, %d\n",
> err);
> > + return -EFAULT;
> > + }
> > +
> > + /* IB ports start with 1, MANA Ethernet ports start with 0 */
> > + port = ucmd.port;
> > + if (ucmd.port > mc->num_ports)
> > + return -EINVAL;
> > +
> > + if (attr->cap.max_send_wr > MAX_SEND_BUFFERS_PER_QUEUE) {
> > + ibdev_dbg(&mdev->ib_dev,
> > + "Requested max_send_wr %d exceeding limit\n",
> > + attr->cap.max_send_wr);
> > + return -EINVAL;
> > + }
> > +
> > + if (attr->cap.max_send_sge > MAX_TX_WQE_SGL_ENTRIES) {
> > + ibdev_dbg(&mdev->ib_dev,
> > + "Requested max_send_sge %d exceeding limit\n",
> > + attr->cap.max_send_sge);
> > + return -EINVAL;
> > + }
> > +
> > + ndev = mc->ports[port - 1];
> > + mpc = netdev_priv(ndev);
> > + ibdev_dbg(&mdev->ib_dev, "port %u ndev %p mpc %p\n", port,
> ndev, mpc);
> > +
> > + err = mana_ib_cfg_vport(mdev, port - 1, pd, mana_ucontext-
> >doorbell);
> > + if (err)
> > + return -ENODEV;
> > +
> > + qp->port = port;
> > +
> > + ibdev_dbg(&mdev->ib_dev, "ucmd sq_buf_addr 0x%llx port %u\n",
> > + ucmd.sq_buf_addr, ucmd.port);
> > +
> > + umem = ib_umem_get(ibpd->device, ucmd.sq_buf_addr,
> ucmd.sq_buf_size,
> > + IB_ACCESS_LOCAL_WRITE);
> > + if (IS_ERR(umem)) {
> > + err = PTR_ERR(umem);
> > + ibdev_dbg(&mdev->ib_dev,
> > + "Failed to get umem for create qp-raw, err %d\n",
> > + err);
> > + goto err_free_vport;
> > + }
> > + qp->sq_umem = umem;
> > +
> > + err = mana_ib_gd_create_dma_region(mdev, qp->sq_umem,
> > + &qp->sq_gdma_region, PAGE_SIZE);
> > + if (err) {
> > + ibdev_err(&mdev->ib_dev,
> > + "Failed to create dma region for create qp-
> raw, %d\n",
> > + err);
>
> It is better not print in userspace-triggered paths.
>
> There are also same issues in other paths.
>
> Thanks,
> Cheng Xu
Thank you, I will scan the code and make sure user-mode can't flood error messages.
This error is a hardware/PF error. It means the hardware channel has faulted. It's logged at error level.
Long
