Signed-off-by: Yuval Shaia <yuval.shaia@xxxxxxxxxx>
---
drivers/infiniband/Kconfig | 1 +
drivers/infiniband/hw/Makefile | 1 +
drivers/infiniband/hw/virtio/Kconfig | 6 +
drivers/infiniband/hw/virtio/Makefile | 4 +
drivers/infiniband/hw/virtio/virtio_rdma.h | 40 +
.../infiniband/hw/virtio/virtio_rdma_device.c | 59 ++
.../infiniband/hw/virtio/virtio_rdma_device.h | 32 +
drivers/infiniband/hw/virtio/virtio_rdma_ib.c | 711 ++++++++++++++++++
drivers/infiniband/hw/virtio/virtio_rdma_ib.h | 48 ++
.../infiniband/hw/virtio/virtio_rdma_main.c | 149 ++++
.../infiniband/hw/virtio/virtio_rdma_netdev.c | 44 ++
.../infiniband/hw/virtio/virtio_rdma_netdev.h | 33 +
include/uapi/linux/virtio_ids.h | 1 +
13 files changed, 1129 insertions(+)
create mode 100644 drivers/infiniband/hw/virtio/Kconfig
create mode 100644 drivers/infiniband/hw/virtio/Makefile
create mode 100644 drivers/infiniband/hw/virtio/virtio_rdma.h
create mode 100644 drivers/infiniband/hw/virtio/virtio_rdma_device.c
create mode 100644 drivers/infiniband/hw/virtio/virtio_rdma_device.h
create mode 100644 drivers/infiniband/hw/virtio/virtio_rdma_ib.c
create mode 100644 drivers/infiniband/hw/virtio/virtio_rdma_ib.h
create mode 100644 drivers/infiniband/hw/virtio/virtio_rdma_main.c
create mode 100644 drivers/infiniband/hw/virtio/virtio_rdma_netdev.c
create mode 100644 drivers/infiniband/hw/virtio/virtio_rdma_netdev.h
diff --git a/drivers/infiniband/Kconfig b/drivers/infiniband/Kconfig
index a1fb840de45d..218a47d4cecf 100644
--- a/drivers/infiniband/Kconfig
+++ b/drivers/infiniband/Kconfig
@@ -107,6 +107,7 @@ source "drivers/infiniband/hw/hfi1/Kconfig"
source "drivers/infiniband/hw/qedr/Kconfig"
source "drivers/infiniband/sw/rdmavt/Kconfig"
source "drivers/infiniband/sw/rxe/Kconfig"
+source "drivers/infiniband/hw/virtio/Kconfig"
endif
source "drivers/infiniband/ulp/ipoib/Kconfig"
diff --git a/drivers/infiniband/hw/Makefile b/drivers/infiniband/hw/Makefile
index e4f31c1be8f7..10ffb2c421e4 100644
--- a/drivers/infiniband/hw/Makefile
+++ b/drivers/infiniband/hw/Makefile
@@ -14,3 +14,4 @@ obj-$(CONFIG_INFINIBAND_HFI1) += hfi1/
obj-$(CONFIG_INFINIBAND_HNS) += hns/
obj-$(CONFIG_INFINIBAND_QEDR) += qedr/
obj-$(CONFIG_INFINIBAND_BNXT_RE) += bnxt_re/
+obj-$(CONFIG_INFINIBAND_VIRTIO_RDMA) += virtio/
diff --git a/drivers/infiniband/hw/virtio/Kconfig b/drivers/infiniband/hw/virtio/Kconfig
new file mode 100644
index 000000000000..92e41691cf5d
--- /dev/null
+++ b/drivers/infiniband/hw/virtio/Kconfig
@@ -0,0 +1,6 @@
+config INFINIBAND_VIRTIO_RDMA
+ tristate "VirtIO Paravirtualized RDMA Driver"
+ depends on NETDEVICES && ETHERNET && PCI && INET
+ ---help---
+ This driver provides low-level support for VirtIO Paravirtual
+ RDMA adapter.
diff --git a/drivers/infiniband/hw/virtio/Makefile b/drivers/infiniband/hw/virtio/Makefile
new file mode 100644
index 000000000000..fb637e467167
--- /dev/null
+++ b/drivers/infiniband/hw/virtio/Makefile
@@ -0,0 +1,4 @@
+obj-$(CONFIG_INFINIBAND_VIRTIO_RDMA) += virtio_rdma.o
+
+virtio_rdma-y := virtio_rdma_main.o virtio_rdma_device.o virtio_rdma_ib.o \
+ virtio_rdma_netdev.o
diff --git a/drivers/infiniband/hw/virtio/virtio_rdma.h b/drivers/infiniband/hw/virtio/virtio_rdma.h
new file mode 100644
index 000000000000..7896a2dfb812
--- /dev/null
+++ b/drivers/infiniband/hw/virtio/virtio_rdma.h
@@ -0,0 +1,40 @@
+/*
+ * Virtio RDMA device: Driver main data types
+ *
+ * Copyright (C) 2019 Yuval Shaia Oracle Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef __VIRTIO_RDMA__
+#define __VIRTIO_RDMA__
+
+#include <linux/virtio.h>
+#include <rdma/ib_verbs.h>
+
+struct virtio_rdma_info {
+ struct ib_device ib_dev;
+ struct virtio_device *vdev;
+ struct virtqueue *ctrl_vq;
+ wait_queue_head_t acked; /* arm on send to host, release on recv */
+ struct net_device *netdev;
+};
+
+static inline struct virtio_rdma_info *to_vdev(struct ib_device *ibdev)
+{
+ return container_of(ibdev, struct virtio_rdma_info, ib_dev);
+}
+
+#endif
diff --git a/drivers/infiniband/hw/virtio/virtio_rdma_device.c b/drivers/infiniband/hw/virtio/virtio_rdma_device.c
new file mode 100644
index 000000000000..ae41e530644f
--- /dev/null
+++ b/drivers/infiniband/hw/virtio/virtio_rdma_device.c
@@ -0,0 +1,59 @@
+/*
+ * Virtio RDMA device: Device related functions and data
+ *
+ * Copyright (C) 2019 Yuval Shaia Oracle Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include <linux/virtio_config.h>
+
+#include "virtio_rdma.h"
+
+static void rdma_ctrl_ack(struct virtqueue *vq)
+{
+ struct virtio_rdma_info *dev = vq->vdev->priv;
+
+ wake_up(&dev->acked);
+
+ printk("%s\n", __func__);
+}
+
+int init_device(struct virtio_rdma_info *dev)
+{
+#define TMP_MAX_VQ 1
+ int rc;
+ struct virtqueue *vqs[TMP_MAX_VQ];
+ vq_callback_t *cbs[TMP_MAX_VQ];
+ const char *names[TMP_MAX_VQ];
+
+ names[0] = "ctrl";
+ cbs[0] = rdma_ctrl_ack;
+ cbs[0] = NULL;
+
+ rc = virtio_find_vqs(dev->vdev, TMP_MAX_VQ, vqs, cbs, names, NULL);
+ if (rc)
+ return rc;
+
+ dev->ctrl_vq = vqs[0];
+
+ return 0;
+}
+
+void fini_device(struct virtio_rdma_info *dev)
+{
+ dev->vdev->config->reset(dev->vdev);
+ dev->vdev->config->del_vqs(dev->vdev);
+}
diff --git a/drivers/infiniband/hw/virtio/virtio_rdma_device.h b/drivers/infiniband/hw/virtio/virtio_rdma_device.h
new file mode 100644
index 000000000000..d9b1240daf92
--- /dev/null
+++ b/drivers/infiniband/hw/virtio/virtio_rdma_device.h
@@ -0,0 +1,32 @@
+/*
+ * Virtio RDMA device: Device related functions and data
+ *
+ * Copyright (C) 2019 Yuval Shaia Oracle Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef __VIRTIO_RDMA_DEVICE__
+#define __VIRTIO_RDMA_DEVICE__
+
+#define VIRTIO_RDMA_BOARD_ID 1
+#define VIRTIO_RDMA_HW_NAME "virtio-rdma"
+#define VIRTIO_RDMA_HW_REV 1
+#define VIRTIO_RDMA_DRIVER_VER "1.0"
+
+int init_device(struct virtio_rdma_info *dev);
+void fini_device(struct virtio_rdma_info *dev);
+
+#endif
diff --git a/drivers/infiniband/hw/virtio/virtio_rdma_ib.c b/drivers/infiniband/hw/virtio/virtio_rdma_ib.c
new file mode 100644
index 000000000000..02bf4a332611
--- /dev/null
+++ b/drivers/infiniband/hw/virtio/virtio_rdma_ib.c
@@ -0,0 +1,711 @@
+/*
+ * Virtio RDMA device: IB related functions and data
+ *
+ * Copyright (C) 2019 Yuval Shaia Oracle Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include <linux/scatterlist.h>
+#include <linux/virtio.h>
+#include <rdma/ib_mad.h>
+
+#include "virtio_rdma.h"
+#include "virtio_rdma_device.h"
+#include "virtio_rdma_ib.h"
+
+/* TODO: Move to uapi header file */
+
+/*
+ * Control virtqueue data structures
+ *
+ * The control virtqueue expects a header in the first sg entry
+ * and an ack/status response in the last entry. Data for the
+ * command goes in between.
+ */
+
+#define VIRTIO_RDMA_CTRL_OK 0
+#define VIRTIO_RDMA_CTRL_ERR 1
+
+struct control_buf {
+ __u8 cmd;
+ __u8 status;
+};
+
+enum {
+ VIRTIO_CMD_QUERY_DEVICE = 10,
+ VIRTIO_CMD_QUERY_PORT,
+ VIRTIO_CMD_CREATE_CQ,
+ VIRTIO_CMD_DESTROY_CQ,
+ VIRTIO_CMD_CREATE_PD,
+ VIRTIO_CMD_DESTROY_PD,
+ VIRTIO_CMD_GET_DMA_MR,
+};
+
+struct cmd_query_port {
+ __u8 port;
+};
+
+struct cmd_create_cq {
+ __u32 cqe;
+};
+
+struct rsp_create_cq {
+ __u32 cqn;
+};
+
+struct cmd_destroy_cq {
+ __u32 cqn;
+};
+
+struct rsp_create_pd {
+ __u32 pdn;
+};
+
+struct cmd_destroy_pd {
+ __u32 pdn;
+};
+
+struct cmd_get_dma_mr {
+ __u32 pdn;
+ __u32 access_flags;
+};
+
+struct rsp_get_dma_mr {
+ __u32 mrn;
+ __u32 lkey;
+ __u32 rkey;
+};
+
+/* TODO: Move to uapi header file */
+
+struct virtio_rdma_ib_cq {
+ struct ib_cq ibcq;
+ u32 cq_handle;
+};
+
+/* TODO: For the scope fof the RFC i'm utilizing ib*_*_attr structures */
+
+static int virtio_rdma_exec_cmd(struct virtio_rdma_info *di, int cmd,
+ struct scatterlist *in, struct scatterlist *out)
+{
+ struct scatterlist *sgs[4], hdr, status;
+ struct control_buf *ctrl;
+ unsigned tmp;
+ int rc;
+
+ ctrl = kmalloc(sizeof(*ctrl), GFP_ATOMIC);
+ ctrl->cmd = cmd;
+ ctrl->status = ~0;
+
+ sg_init_one(&hdr, &ctrl->cmd, sizeof(ctrl->cmd));
+ sgs[0] = &hdr;
+ sgs[1] = in;
+ sgs[2] = out;
+ sg_init_one(&status, &ctrl->status, sizeof(ctrl->status));
+ sgs[3] = &status;
+
+ rc = virtqueue_add_sgs(di->ctrl_vq, sgs, 2, 2, di, GFP_ATOMIC);
+ if (rc)
+ goto out;
+
+ if (unlikely(!virtqueue_kick(di->ctrl_vq))) {
+ goto out_with_status;
+ }
+
+ /* Spin for a response, the kick causes an ioport write, trapping
+ * into the hypervisor, so the request should be handled
+ * immediately */
+ while (!virtqueue_get_buf(di->ctrl_vq, &tmp) &&
+ !virtqueue_is_broken(di->ctrl_vq))
+ cpu_relax();
+
+out_with_status:
+ printk("%s: cmd %d, status %d\n", __func__, ctrl->cmd, ctrl->status);
+ rc = ctrl->status == VIRTIO_RDMA_CTRL_OK ? 0 : 1;
+
+out:
+ kfree(ctrl);
+
+ return rc;
+}
+
+static int virtio_rdma_port_immutable(struct ib_device *ibdev, u8 port_num,
+ struct ib_port_immutable *immutable)
+{
+ struct ib_port_attr attr;
+ int rc;
+
+ rc = ib_query_port(ibdev, port_num, &attr);
+ if (rc)
+ return rc;
+
+ immutable->core_cap_flags |= RDMA_CORE_PORT_IBA_ROCE_UDP_ENCAP;
+ immutable->pkey_tbl_len = attr.pkey_tbl_len;
+ immutable->gid_tbl_len = attr.gid_tbl_len;
+ immutable->max_mad_size = IB_MGMT_MAD_SIZE;
+
+ return 0;
+}
+
+static int virtio_rdma_query_device(struct ib_device *ibdev,
+ struct ib_device_attr *props,
+ struct ib_udata *uhw)
+{
+ struct scatterlist data;
+ int offs;
+ int rc;
+
+ if (uhw->inlen || uhw->outlen)
+ return -EINVAL;
+
+ /* We start with sys_image_guid because of inconsistency beween ib_
+ * and ibv_ */
+ offs = offsetof(struct ib_device_attr, sys_image_guid);
+ sg_init_one(&data, (void *)props + offs, sizeof(*props) - offs);
+
+ rc = virtio_rdma_exec_cmd(to_vdev(ibdev), VIRTIO_CMD_QUERY_DEVICE, NULL,
+ &data);
+
+ printk("%s: sys_image_guid 0x%llx\n", __func__,
+ be64_to_cpu(props->sys_image_guid));
+
+ return rc;
+}
+
+static int virtio_rdma_query_port(struct ib_device *ibdev, u8 port,
+ struct ib_port_attr *props)
+{
+ struct scatterlist in, out;
+ struct cmd_query_port *cmd;
+ int offs;
+ int rc;
+
+ cmd = kmalloc(sizeof(*cmd), GFP_ATOMIC);
+ if (!cmd)
+ return -ENOMEM;
+
+ /* We start with state because of inconsistency beween ib and ibv */
+ offs = offsetof(struct ib_port_attr, state);
+ sg_init_one(&out, (void *)props + offs, sizeof(*props) - offs);
+
+ cmd->port = port;
+ sg_init_one(&in, cmd, sizeof(*cmd));
+ printk("%s: port %d\n", __func__, cmd->port);
+
+ rc = virtio_rdma_exec_cmd(to_vdev(ibdev), VIRTIO_CMD_QUERY_PORT, &in,
+ &out);
+
+ printk("%s: gid_tbl_len %d\n", __func__, props->gid_tbl_len);
+
+ kfree(cmd);
+
+ return rc;
+}
+
+static struct net_device *virtio_rdma_get_netdev(struct ib_device *ibdev,
+ u8 port_num)
+{
+ struct virtio_rdma_info *ri = to_vdev(ibdev);
+
+ printk("%s:\n", __func__);
+
+ return ri->netdev;
+}
+
+struct ib_cq *virtio_rdma_create_cq(struct ib_device *ibdev,
+ const struct ib_cq_init_attr *attr,
+ struct ib_ucontext *context,
+ struct ib_udata *udata)
+{
+ struct scatterlist in, out;
+ struct virtio_rdma_ib_cq *vcq;
+ struct cmd_create_cq *cmd;
+ struct rsp_create_cq *rsp;
+ struct ib_cq *cq = NULL;
+ int rc;
+
+ /* TODO: Check MAX_CQ */
+
+ cmd = kmalloc(sizeof(*cmd), GFP_ATOMIC);
+ if (!cmd)
+ return ERR_PTR(-ENOMEM);
+
+ rsp = kmalloc(sizeof(*rsp), GFP_ATOMIC);
+ if (!rsp) {
+ kfree(cmd);
+ return ERR_PTR(-ENOMEM);
+ }
+
+ vcq = kzalloc(sizeof(*vcq), GFP_KERNEL);
+ if (!vcq)
+ goto out;
+
+ cmd->cqe = attr->cqe;
+ sg_init_one(&in, cmd, sizeof(*cmd));
+ printk("%s: cqe %d\n", __func__, cmd->cqe);
+
+ sg_init_one(&out, rsp, sizeof(*rsp));
+
+ rc = virtio_rdma_exec_cmd(to_vdev(ibdev), VIRTIO_CMD_CREATE_CQ, &in,
+ &out);
+ if (rc)
+ goto out_err;
+
+ printk("%s: cqn 0x%x\n", __func__, rsp->cqn);
+ vcq->cq_handle = rsp->cqn;
+ vcq->ibcq.cqe = attr->cqe;
+ cq = &vcq->ibcq;
+
+ goto out;
+
+out_err:
+ kfree(vcq);
+ return ERR_PTR(rc);
+
+out:
+ kfree(rsp);
+ kfree(cmd);
+ return cq;
+}
+
+int virtio_rdma_destroy_cq(struct ib_cq *cq)
+{
+ struct virtio_rdma_ib_cq *vcq;
+ struct scatterlist in;
+ struct cmd_destroy_cq *cmd;
+ int rc;
+
+ cmd = kmalloc(sizeof(*cmd), GFP_ATOMIC);
+ if (!cmd)
+ return -ENOMEM;
+
+ vcq = container_of(cq, struct virtio_rdma_ib_cq, ibcq);
+
+ cmd->cqn = vcq->cq_handle;
+ sg_init_one(&in, cmd, sizeof(*cmd));
+
+ rc = virtio_rdma_exec_cmd(to_vdev(cq->device), VIRTIO_CMD_DESTROY_CQ,
+ &in, NULL);
+
+ kfree(cmd);
+
+ kfree(vcq);
+
+ return rc;
+}
+
+int virtio_rdma_alloc_pd(struct ib_pd *ibpd, struct ib_ucontext *context,
+ struct ib_udata *udata)
+{
+ struct virtio_rdma_pd *pd = to_vpd(ibpd);
+ struct ib_device *ibdev = ibpd->device;
+ struct rsp_create_pd *rsp;
+ struct scatterlist out;
+ int rc;
+
+ /* TODO: Check MAX_PD */
+
+ rsp = kmalloc(sizeof(*rsp), GFP_ATOMIC);
+ if (!rsp)
+ return -ENOMEM;
+
+ sg_init_one(&out, rsp, sizeof(*rsp));
+
+ rc = virtio_rdma_exec_cmd(to_vdev(ibdev), VIRTIO_CMD_CREATE_PD, NULL,
+ &out);
+ if (rc)
+ goto out;
+
+ pd->pd_handle = rsp->pdn;
+
+ printk("%s: pd_handle=%d\n", __func__, pd->pd_handle);
+
+out:
+ kfree(rsp);
+
+ printk("%s: rc=%d\n", __func__, rc);
+ return rc;
+}
+
+void virtio_rdma_dealloc_pd(struct ib_pd *pd)
+{
+ struct virtio_rdma_pd *vpd = to_vpd(pd);
+ struct ib_device *ibdev = pd->device;
+ struct cmd_destroy_pd *cmd;
+ struct scatterlist in;
+
+ printk("%s:\n", __func__);
+
+ cmd = kmalloc(sizeof(*cmd), GFP_ATOMIC);
+ if (!cmd)
+ return;
+
+ cmd->pdn = vpd->pd_handle;
+ sg_init_one(&in, cmd, sizeof(*cmd));
+
+ virtio_rdma_exec_cmd(to_vdev(ibdev), VIRTIO_CMD_DESTROY_PD, &in, NULL);
+
+ kfree(cmd);
+}
+
+struct ib_mr *virtio_rdma_get_dma_mr(struct ib_pd *pd, int acc)
+
+{
+ struct virtio_rdma_user_mr *mr;
+ struct scatterlist in, out;
+ struct cmd_get_dma_mr *cmd = NULL;
+ struct rsp_get_dma_mr *rsp = NULL;
+ int rc;
+
+ mr = kzalloc(sizeof(*mr), GFP_KERNEL);
+ if (!mr)
+ return ERR_PTR(-ENOMEM);
+
+ cmd = kmalloc(sizeof(*cmd), GFP_ATOMIC);
+ if (!cmd) {
+ kfree(mr);
+ return ERR_PTR(-ENOMEM);
+ }
+
+ rsp = kmalloc(sizeof(*rsp), GFP_ATOMIC);
+ if (!cmd) {
+ kfree(mr);
+ kfree(cmd);
+ return ERR_PTR(-ENOMEM);
+ }
+
+ cmd->pdn = to_vpd(pd)->pd_handle;
+ cmd->access_flags = acc;
+ sg_init_one(&in, cmd, sizeof(*cmd));
+
+ sg_init_one(&out, rsp, sizeof(*rsp));
+
+ rc = virtio_rdma_exec_cmd(to_vdev(pd->device), VIRTIO_CMD_GET_DMA_MR,
+ &in, &out);
+ if (rc) {
+ kfree(mr);
+ kfree(cmd);
+ return ERR_PTR(rc);
+ }
+
+ mr->mr_handle = rsp->mrn;
+ mr->ibmr.lkey = rsp->lkey;
+ mr->ibmr.rkey = rsp->rkey;
+
+ printk("%s: mr_handle=0x%x\n", __func__, mr->mr_handle);
+
+ kfree(cmd);
+ kfree(rsp);
+
+ return &mr->ibmr;
+}
+
+struct ib_qp *virtio_rdma_create_qp(struct ib_pd *pd,
+ struct ib_qp_init_attr *init_attr,
+ struct ib_udata *udata)
+{
+ /* struct pvrdma_dev *dev = to_vdev(pd->device); */
+ struct virtio_rdma_qp *qp;
+
+ printk("%s:\n", __func__);
+
+ qp = kzalloc(sizeof(*qp), GFP_KERNEL);
+ if (!qp)
+ return ERR_PTR(-ENOMEM);
+
+ return &qp->ibqp;
+}
+
+int virtio_rdma_query_gid(struct ib_device *ibdev, u8 port, int index,
+ union ib_gid *gid)
+{
+ memset(gid, 0, sizeof(union ib_gid));
+
+ printk("%s: port %d, index %d\n", __func__, port, index);
+
+ return 0;
+}
+
+static int virtio_rdma_add_gid(const struct ib_gid_attr *attr, void **context)
+{
+ printk("%s:\n", __func__);
+
+ return 0;
+}
+
+struct ib_mr *virtio_rdma_alloc_mr(struct ib_pd *pd, enum ib_mr_type mr_type,
+ u32 max_num_sg)
+{
+ printk("%s: mr_type %d, max_num_sg %d\n", __func__, mr_type,
+ max_num_sg);
+
+ return NULL;
+}
+
+int virtio_rdma_alloc_ucontext(struct ib_ucontext *uctx, struct ib_udata *udata)
+{
+ printk("%s:\n", __func__);
+
+ return 0;
+}
+
+struct ib_ah *virtio_rdma_create_ah(struct ib_pd *pd,
+ struct rdma_ah_attr *ah_attr, u32 flags,
+ struct ib_udata *udata)
+{
+ printk("%s:\n", __func__);
+
+ return NULL;
+}
+
+void virtio_rdma_dealloc_ucontext(struct ib_ucontext *ibcontext)
+
+{
+}
+
+static int virtio_rdma_del_gid(const struct ib_gid_attr *attr, void **context)
+{
+ printk("%s:\n", __func__);
+
+ return 0;
+}
+
+int virtio_rdma_dereg_mr(struct ib_mr *ibmr)
+{
+ printk("%s:\n", __func__);
+
+ return 0;
+}
+
+int virtio_rdma_destroy_ah(struct ib_ah *ah, u32 flags)
+{
+ printk("%s:\n", __func__);
+
+ return 0;
+}
+
+struct virtio_rdma_cq {
+ struct ib_cq ibcq;
+};
+
+int virtio_rdma_destroy_qp(struct ib_qp *qp)
+{
+ printk("%s:\n", __func__);
+
+ return 0;
+}
+
+static void virtio_rdma_get_fw_ver_str(struct ib_device *device, char *str)
+{
+ printk("%s:\n", __func__);
+}
+
+enum rdma_link_layer virtio_rdma_port_link_layer(struct ib_device *ibdev,
+ u8 port)
+{
+ return IB_LINK_LAYER_ETHERNET;
+}
+
+int virtio_rdma_map_mr_sg(struct ib_mr *ibmr, struct scatterlist *sg,
+ int sg_nents, unsigned int *sg_offset)
+{
+ printk("%s:\n", __func__);
+
+ return 0;
+}
+
+int virtio_rdma_mmap(struct ib_ucontext *ibcontext, struct vm_area_struct *vma)
+{
+ printk("%s:\n", __func__);
+
+ return 0;
+}
+
+int virtio_rdma_modify_port(struct ib_device *ibdev, u8 port, int mask,
+ struct ib_port_modify *props)
+{
+ printk("%s:\n", __func__);
+
+ return 0;
+}
+
+int virtio_rdma_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
+ int attr_mask, struct ib_udata *udata)
+{
+ printk("%s:\n", __func__);
+
+ return 0;
+}
+
+int virtio_rdma_poll_cq(struct ib_cq *ibcq, int num_entries, struct ib_wc *wc)
+{
+ printk("%s:\n", __func__);
+
+ return 0;
+}
+
+int virtio_rdma_post_recv(struct ib_qp *ibqp, const struct ib_recv_wr *wr,
+ const struct ib_recv_wr **bad_wr)
+{
+ printk("%s:\n", __func__);
+
+ return 0;
+}
+
+int virtio_rdma_post_send(struct ib_qp *ibqp, const struct ib_send_wr *wr,
+ const struct ib_send_wr **bad_wr)
+{
+ printk("%s:\n", __func__);
+
+ return 0;
+}
+
+int virtio_rdma_query_pkey(struct ib_device *ibdev, u8 port, u16 index,
+ u16 *pkey)
+{
+ printk("%s:\n", __func__);
+
+ return 0;
+}
+
+int virtio_rdma_query_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
+ int attr_mask, struct ib_qp_init_attr *init_attr)
+{
+ printk("%s:\n", __func__);
+
+ return 0;
+}
+
+struct ib_mr *virtio_rdma_reg_user_mr(struct ib_pd *pd, u64 start, u64 length,
+ u64 virt_addr, int access_flags,
+ struct ib_udata *udata)
+{
+ printk("%s:\n", __func__);
+
+ return NULL;
+}
+
+int virtio_rdma_req_notify_cq(struct ib_cq *ibcq,
+ enum ib_cq_notify_flags notify_flags)
+{
+ printk("%s:\n", __func__);
+
+ return 0;
+}
+
+static const struct ib_device_ops virtio_rdma_dev_ops = {
+ .get_port_immutable = virtio_rdma_port_immutable,
+ .query_device = virtio_rdma_query_device,
+ .query_port = virtio_rdma_query_port,
+ .get_netdev = virtio_rdma_get_netdev,
+ .create_cq = virtio_rdma_create_cq,
+ .destroy_cq = virtio_rdma_destroy_cq,
+ .alloc_pd = virtio_rdma_alloc_pd,
+ .dealloc_pd = virtio_rdma_dealloc_pd,
+ .get_dma_mr = virtio_rdma_get_dma_mr,
+ .create_qp = virtio_rdma_create_qp,
+ .query_gid = virtio_rdma_query_gid,
+ .add_gid = virtio_rdma_add_gid,
+ .alloc_mr = virtio_rdma_alloc_mr,
+ .alloc_ucontext = virtio_rdma_alloc_ucontext,
+ .create_ah = virtio_rdma_create_ah,
+ .dealloc_ucontext = virtio_rdma_dealloc_ucontext,
+ .del_gid = virtio_rdma_del_gid,
+ .dereg_mr = virtio_rdma_dereg_mr,
+ .destroy_ah = virtio_rdma_destroy_ah,
+ .destroy_qp = virtio_rdma_destroy_qp,
+ .get_dev_fw_str = virtio_rdma_get_fw_ver_str,
+ .get_link_layer = virtio_rdma_port_link_layer,
+ .get_port_immutable = virtio_rdma_port_immutable,
+ .map_mr_sg = virtio_rdma_map_mr_sg,
+ .mmap = virtio_rdma_mmap,
+ .modify_port = virtio_rdma_modify_port,
+ .modify_qp = virtio_rdma_modify_qp,
+ .poll_cq = virtio_rdma_poll_cq,
+ .post_recv = virtio_rdma_post_recv,
+ .post_send = virtio_rdma_post_send,
+ .query_device = virtio_rdma_query_device,
+ .query_pkey = virtio_rdma_query_pkey,
+ .query_port = virtio_rdma_query_port,
+ .query_qp = virtio_rdma_query_qp,
+ .reg_user_mr = virtio_rdma_reg_user_mr,
+ .req_notify_cq = virtio_rdma_req_notify_cq,
+ INIT_RDMA_OBJ_SIZE(ib_pd, virtio_rdma_pd, ibpd),
+};
+
+static ssize_t hca_type_show(struct device *device,
+ struct device_attribute *attr, char *buf)
+{
+ return sprintf(buf, "%s-%s\n", VIRTIO_RDMA_HW_NAME,
+ VIRTIO_RDMA_DRIVER_VER);
+}
+static DEVICE_ATTR_RO(hca_type);
+
+static ssize_t hw_rev_show(struct device *device,
+ struct device_attribute *attr, char *buf)
+{
+ return sprintf(buf, "%d\n", VIRTIO_RDMA_HW_REV);
+}
+static DEVICE_ATTR_RO(hw_rev);
+
+static ssize_t board_id_show(struct device *device,
+ struct device_attribute *attr, char *buf)
+{
+ return sprintf(buf, "%d\n", VIRTIO_RDMA_BOARD_ID);
+}
+static DEVICE_ATTR_RO(board_id);
+
+static struct attribute *virtio_rdmaa_class_attributes[] = {
+ &dev_attr_hw_rev.attr,
+ &dev_attr_hca_type.attr,
+ &dev_attr_board_id.attr,
+ NULL,
+};
+
+static const struct attribute_group virtio_rdmaa_attr_group = {
+ .attrs = virtio_rdmaa_class_attributes,
+};
+
+int init_ib(struct virtio_rdma_info *ri)
+{
+ int rc;
+
+ ri->ib_dev.owner = THIS_MODULE;
+ ri->ib_dev.num_comp_vectors = 1;
+ ri->ib_dev.dev.parent = &ri->vdev->dev;
+ ri->ib_dev.node_type = RDMA_NODE_IB_CA;
+ ri->ib_dev.phys_port_cnt = 1;
+ ri->ib_dev.uverbs_cmd_mask =
+ (1ull << IB_USER_VERBS_CMD_QUERY_DEVICE) |
+ (1ull << IB_USER_VERBS_CMD_QUERY_PORT) |
+ (1ull << IB_USER_VERBS_CMD_CREATE_CQ) |
+ (1ull << IB_USER_VERBS_CMD_DESTROY_CQ) |
+ (1ull << IB_USER_VERBS_CMD_ALLOC_PD) |
+ (1ull << IB_USER_VERBS_CMD_DEALLOC_PD);
+
+ rdma_set_device_sysfs_group(&ri->ib_dev, &virtio_rdmaa_attr_group);
+
+ ib_set_device_ops(&ri->ib_dev, &virtio_rdma_dev_ops);
+
+ rc = ib_register_device(&ri->ib_dev, "virtio_rdma%d");
+
+ return rc;
+}
+
+void fini_ib(struct virtio_rdma_info *ri)
+{
+ ib_unregister_device(&ri->ib_dev);
+}
diff --git a/drivers/infiniband/hw/virtio/virtio_rdma_ib.h b/drivers/infiniband/hw/virtio/virtio_rdma_ib.h
new file mode 100644
index 000000000000..7b82a60581ff
--- /dev/null
+++ b/drivers/infiniband/hw/virtio/virtio_rdma_ib.h
@@ -0,0 +1,48 @@
+/*
+ * Virtio RDMA device: IB related functions and data
+ *
+ * Copyright (C) 2019 Yuval Shaia Oracle Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef __VIRTIO_RDMA_IB__
+#define __VIRTIO_RDMA_IB__
+
+#include <rdma/ib_verbs.h>
+
+struct virtio_rdma_pd {
+ struct ib_pd ibpd;
+ u32 pd_handle;
+};
+
+struct virtio_rdma_user_mr {
+ struct ib_mr ibmr;
+ u32 mr_handle;
+};
+
+struct virtio_rdma_qp {
+ struct ib_qp ibqp;
+};
+
+static inline struct virtio_rdma_pd *to_vpd(struct ib_pd *ibpd)
+{
+ return container_of(ibpd, struct virtio_rdma_pd, ibpd);
+}
+
+int init_ib(struct virtio_rdma_info *ri);
+void fini_ib(struct virtio_rdma_info *ri);
+
+#endif
diff --git a/drivers/infiniband/hw/virtio/virtio_rdma_main.c b/drivers/infiniband/hw/virtio/virtio_rdma_main.c
new file mode 100644
index 000000000000..811533d63160
--- /dev/null
+++ b/drivers/infiniband/hw/virtio/virtio_rdma_main.c
@@ -0,0 +1,149 @@
+/*
+ * Virtio RDMA device
+ *
+ * Copyright (C) 2019 Yuval Shaia Oracle Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include <linux/err.h>
+#include <linux/scatterlist.h>
+#include <linux/spinlock.h>
+#include <linux/virtio.h>
+#include <linux/module.h>
+#include <uapi/linux/virtio_ids.h>
+
+#include "virtio_rdma.h"
+#include "virtio_rdma_device.h"
+#include "virtio_rdma_ib.h"
+#include "virtio_rdma_netdev.h"
+
+/* TODO:
+ * - How to hook to unload driver, we need to undo all the stuff with did
+ * for all the devices that probed
+ * -
+ */
+
+static int virtio_rdma_probe(struct virtio_device *vdev)
+{
+ struct virtio_rdma_info *ri;
+ int rc = -EIO;
+
+ ri = ib_alloc_device(virtio_rdma_info, ib_dev);
+ if (!ri) {
+ pr_err("Fail to allocate IB device\n");
+ rc = -ENOMEM;
+ goto out;
+ }
+ vdev->priv = ri;
+
+ ri->vdev = vdev;
+
+ rc = init_device(ri);
+ if (rc) {
+ pr_err("Fail to connect to device\n");
+ goto out_dealloc_ib_device;
+ }
+
+ rc = init_netdev(ri);
+ if (rc) {
+ pr_err("Fail to connect to NetDev layer\n");
+ goto out_fini_device;
+ }
+
+ rc = init_ib(ri);
+ if (rc) {
+ pr_err("Fail to connect to IB layer\n");
+ goto out_fini_netdev;
+ }
+
+ pr_info("VirtIO RDMA device %d probed\n", vdev->index);
+
+ goto out;
+
+out_fini_netdev:
+ fini_netdev(ri);
+
+out_fini_device:
+ fini_device(ri);
+
+out_dealloc_ib_device:
+ ib_dealloc_device(&ri->ib_dev);
+
+ vdev->priv = NULL;
+
+out:
+ return rc;
+}
+
+static void virtio_rdma_remove(struct virtio_device *vdev)
+{
+ struct virtio_rdma_info *ri = vdev->priv;
+
+ if (!ri)
+ return;
+
+ vdev->priv = NULL;
+
+ fini_ib(ri);
+
+ fini_netdev(ri);
+
+ fini_device(ri);
+
+ ib_dealloc_device(&ri->ib_dev);
+
+ pr_info("VirtIO RDMA device %d removed\n", vdev->index);
+}
+
+static struct virtio_device_id id_table[] = {
+ { VIRTIO_ID_RDMA, VIRTIO_DEV_ANY_ID },
+ { 0 },
+};
+
+static struct virtio_driver virtio_rdma_driver = {
+ .driver.name = KBUILD_MODNAME,
+ .driver.owner = THIS_MODULE,
+ .id_table = id_table,
+ .probe = virtio_rdma_probe,
+ .remove = virtio_rdma_remove,
+};
+
+static int __init virtio_rdma_init(void)
+{
+ int rc;
+
+ rc = register_virtio_driver(&virtio_rdma_driver);
+ if (rc) {
+ pr_err("%s: Fail to register virtio driver (%d)\n", __func__,
+ rc);
+ return rc;
+ }
+
+ return 0;
+}
+
+static void __exit virtio_rdma_fini(void)
+{
+ unregister_virtio_driver(&virtio_rdma_driver);
+}
+
+module_init(virtio_rdma_init);
+module_exit(virtio_rdma_fini);
+
+MODULE_DEVICE_TABLE(virtio, id_table);
+MODULE_AUTHOR("Yuval Shaia");
+MODULE_DESCRIPTION("Virtio RDMA driver");
+MODULE_LICENSE("Dual BSD/GPL");
diff --git a/drivers/infiniband/hw/virtio/virtio_rdma_netdev.c b/drivers/infiniband/hw/virtio/virtio_rdma_netdev.c
new file mode 100644
index 000000000000..001f30b3e0b9
--- /dev/null
+++ b/drivers/infiniband/hw/virtio/virtio_rdma_netdev.c
@@ -0,0 +1,44 @@
+/*
+ * Virtio RDMA device
+ *
+ * Copyright (C) 2019 Yuval Shaia Oracle Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include "virtio_rdma_netdev.h"
+
+int init_netdev(struct virtio_rdma_info *ri)
+{
+ struct net_device *dev;
+ struct virtio_rdma_netdev_info *vrndi;
+
+ dev = alloc_etherdev(sizeof(struct virtio_rdma_netdev_info));
+ if (!dev) {
+ return -ENOMEM;
+ }
+
+ SET_NETDEV_DEV(dev, &ri->vdev->dev);
+ vrndi = netdev_priv(dev);
+ vrndi->ri = ri;
+ ri->netdev = dev;
+
+ return 0;
+}
+
+void fini_netdev(struct virtio_rdma_info *ri)
+{
+ unregister_netdev(ri->netdev);
+}
diff --git a/drivers/infiniband/hw/virtio/virtio_rdma_netdev.h b/drivers/infiniband/hw/virtio/virtio_rdma_netdev.h
new file mode 100644
index 000000000000..e7e5d276d8ec
--- /dev/null
+++ b/drivers/infiniband/hw/virtio/virtio_rdma_netdev.h
@@ -0,0 +1,33 @@
+/*
+ * Virtio RDMA device: Netdev related functions and data
+ *
+ * Copyright (C) 2019 Yuval Shaia Oracle Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef __VIRTIO_RDMA_NETDEV__
+#define __VIRTIO_RDMA_NETDEV__
+
+#include "virtio_rdma.h"
+
+struct virtio_rdma_netdev_info {
+ struct virtio_rdma_info *ri;
+};
+
+int init_netdev(struct virtio_rdma_info *ri);
+void fini_netdev(struct virtio_rdma_info *ri);
+
+#endif
diff --git a/include/uapi/linux/virtio_ids.h b/include/uapi/linux/virtio_ids.h
index 6d5c3b2d4f4d..288ee6fec8d3 100644
--- a/include/uapi/linux/virtio_ids.h
+++ b/include/uapi/linux/virtio_ids.h
@@ -43,5 +43,6 @@
#define VIRTIO_ID_INPUT 18 /* virtio input */
#define VIRTIO_ID_VSOCK 19 /* virtio vsock transport */
#define VIRTIO_ID_CRYPTO 20 /* virtio crypto */
+#define VIRTIO_ID_RDMA 26 /* RDMA */
#endif /* _LINUX_VIRTIO_IDS_H */
--
2.17.0
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