IB/mlx4: Add a driver Mellanox ConnectX InfiniBand adapters

Add an InfiniBand driver for Mellanox ConnectX adapters.  Because
these adapters can also be used as ethernet NICs and Fibre Channel 
HBAs, the driver is split into two modules: 
 
  mlx4_core: Handles low-level things like device initialization and 
    processing firmware commands.  Also controls resource allocation 
    so that the InfiniBand, ethernet and FC functions can share a 
    device without stepping on each other. 
 
  mlx4_ib: Handles InfiniBand-specific things; plugs into the 
    InfiniBand midlayer. 

Signed-off-by: Roland Dreier <rolandd@cisco.com>

1 files changed, 651 insertions, 0 deletions

diff --git a/drivers/infiniband/hw/mlx4/main.c b/drivers/infiniband/hw/mlx4/main.c
new file mode 100644
index 000000000000..688ecb4c39f3
--- /dev/null
+++ b/drivers/infiniband/hw/mlx4/main.c
@@ -0,0 +1,651 @@
+/*
+ * Copyright (c) 2006, 2007 Cisco Systems, Inc. All rights reserved.
+ *
+ * This software is available to you under a choice of one of two
+ * licenses.  You may choose to be licensed under the terms of the GNU
+ * General Public License (GPL) Version 2, available from the file
+ * COPYING in the main directory of this source tree, or the
+ * OpenIB.org BSD license below:
+ *
+ *     Redistribution and use in source and binary forms, with or
+ *     without modification, are permitted provided that the following
+ *     conditions are met:
+ *
+ *      - Redistributions of source code must retain the above
+ *        copyright notice, this list of conditions and the following
+ *        disclaimer.
+ *
+ *      - Redistributions in binary form must reproduce the above
+ *        copyright notice, this list of conditions and the following
+ *        disclaimer in the documentation and/or other materials
+ *        provided with the distribution.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/errno.h>
+
+#include <rdma/ib_smi.h>
+#include <rdma/ib_user_verbs.h>
+
+#include <linux/mlx4/driver.h>
+#include <linux/mlx4/cmd.h>
+
+#include "mlx4_ib.h"
+#include "user.h"
+
+#define DRV_NAME        "mlx4_ib"
+#define DRV_VERSION     "0.01"
+#define DRV_RELDATE     "May 1, 2006"
+
+MODULE_AUTHOR("Roland Dreier");
+MODULE_DESCRIPTION("Mellanox ConnectX HCA InfiniBand driver");
+MODULE_LICENSE("Dual BSD/GPL");
+MODULE_VERSION(DRV_VERSION);
+
+static const char mlx4_ib_version[] __devinitdata =
+        DRV_NAME ": Mellanox ConnectX InfiniBand driver v"
+        DRV_VERSION " (" DRV_RELDATE ")\n";
+
+static void init_query_mad(struct ib_smp *mad)
+{
+        mad->base_version  = 1;
+        mad->mgmt_class    = IB_MGMT_CLASS_SUBN_LID_ROUTED;
+        mad->class_version = 1;
+        mad->method        = IB_MGMT_METHOD_GET;
+}
+
+static int mlx4_ib_query_device(struct ib_device *ibdev,
+                                struct ib_device_attr *props)
+{
+        struct mlx4_ib_dev *dev = to_mdev(ibdev);
+        struct ib_smp *in_mad  = NULL;
+        struct ib_smp *out_mad = NULL;
+        int err = -ENOMEM;
+
+        in_mad  = kzalloc(sizeof *in_mad, GFP_KERNEL);
+        out_mad = kmalloc(sizeof *out_mad, GFP_KERNEL);
+        if (!in_mad || !out_mad)
+                goto out;
+
+        init_query_mad(in_mad);
+        in_mad->attr_id = IB_SMP_ATTR_NODE_INFO;
+
+        err = mlx4_MAD_IFC(to_mdev(ibdev), 1, 1, 1, NULL, NULL, in_mad, out_mad);
+        if (err)
+                goto out;
+
+        memset(props, 0, sizeof *props);
+
+        props->fw_ver = dev->dev->caps.fw_ver;
+        props->device_cap_flags    = IB_DEVICE_CHANGE_PHY_PORT |
+                IB_DEVICE_PORT_ACTIVE_EVENT             |
+                IB_DEVICE_SYS_IMAGE_GUID                |
+                IB_DEVICE_RC_RNR_NAK_GEN;
+        if (dev->dev->caps.flags & MLX4_DEV_CAP_FLAG_BAD_PKEY_CNTR)
+                props->device_cap_flags |= IB_DEVICE_BAD_PKEY_CNTR;
+        if (dev->dev->caps.flags & MLX4_DEV_CAP_FLAG_BAD_QKEY_CNTR)
+                props->device_cap_flags |= IB_DEVICE_BAD_QKEY_CNTR;
+        if (dev->dev->caps.flags & MLX4_DEV_CAP_FLAG_APM)
+                props->device_cap_flags |= IB_DEVICE_AUTO_PATH_MIG;
+        if (dev->dev->caps.flags & MLX4_DEV_CAP_FLAG_UD_AV_PORT)
+                props->device_cap_flags |= IB_DEVICE_UD_AV_PORT_ENFORCE;
+
+        props->vendor_id           = be32_to_cpup((__be32 *) (out_mad->data + 36)) &
+                0xffffff;
+        props->vendor_part_id      = be16_to_cpup((__be16 *) (out_mad->data + 30));
+        props->hw_ver              = be32_to_cpup((__be32 *) (out_mad->data + 32));
+        memcpy(&props->sys_image_guid, out_mad->data +  4, 8);
+
+        props->max_mr_size         = ~0ull;
+        props->page_size_cap       = dev->dev->caps.page_size_cap;
+        props->max_qp              = dev->dev->caps.num_qps - dev->dev->caps.reserved_qps;
+        props->max_qp_wr           = dev->dev->caps.max_wqes;
+        props->max_sge             = min(dev->dev->caps.max_sq_sg,
+                                         dev->dev->caps.max_rq_sg);
+        props->max_cq              = dev->dev->caps.num_cqs - dev->dev->caps.reserved_cqs;
+        props->max_cqe             = dev->dev->caps.max_cqes;
+        props->max_mr              = dev->dev->caps.num_mpts - dev->dev->caps.reserved_mrws;
+        props->max_pd              = dev->dev->caps.num_pds - dev->dev->caps.reserved_pds;
+        props->max_qp_rd_atom      = dev->dev->caps.max_qp_dest_rdma;
+        props->max_qp_init_rd_atom = dev->dev->caps.max_qp_init_rdma;
+        props->max_res_rd_atom     = props->max_qp_rd_atom * props->max_qp;
+        props->max_srq             = dev->dev->caps.num_srqs - dev->dev->caps.reserved_srqs;
+        props->max_srq_wr          = dev->dev->caps.max_srq_wqes;
+        props->max_srq_sge         = dev->dev->caps.max_srq_sge;
+        props->local_ca_ack_delay  = dev->dev->caps.local_ca_ack_delay;
+        props->atomic_cap          = dev->dev->caps.flags & MLX4_DEV_CAP_FLAG_ATOMIC ?
+                IB_ATOMIC_HCA : IB_ATOMIC_NONE;
+        props->max_pkeys           = dev->dev->caps.pkey_table_len;
+        props->max_mcast_grp       = dev->dev->caps.num_mgms + dev->dev->caps.num_amgms;
+        props->max_mcast_qp_attach = dev->dev->caps.num_qp_per_mgm;
+        props->max_total_mcast_qp_attach = props->max_mcast_qp_attach *
+                                           props->max_mcast_grp;
+        props->max_map_per_fmr = (1 << (32 - ilog2(dev->dev->caps.num_mpts))) - 1;
+
+out:
+        kfree(in_mad);
+        kfree(out_mad);
+
+        return err;
+}
+
+static int mlx4_ib_query_port(struct ib_device *ibdev, u8 port,
+                              struct ib_port_attr *props)
+{
+        struct ib_smp *in_mad  = NULL;
+        struct ib_smp *out_mad = NULL;
+        int err = -ENOMEM;
+
+        in_mad  = kzalloc(sizeof *in_mad, GFP_KERNEL);
+        out_mad = kmalloc(sizeof *out_mad, GFP_KERNEL);
+        if (!in_mad || !out_mad)
+                goto out;
+
+        memset(props, 0, sizeof *props);
+
+        init_query_mad(in_mad);
+        in_mad->attr_id  = IB_SMP_ATTR_PORT_INFO;
+        in_mad->attr_mod = cpu_to_be32(port);
+
+        err = mlx4_MAD_IFC(to_mdev(ibdev), 1, 1, port, NULL, NULL, in_mad, out_mad);
+        if (err)
+                goto out;
+
+        props->lid              = be16_to_cpup((__be16 *) (out_mad->data + 16));
+        props->lmc              = out_mad->data[34] & 0x7;
+        props->sm_lid           = be16_to_cpup((__be16 *) (out_mad->data + 18));
+        props->sm_sl            = out_mad->data[36] & 0xf;
+        props->state            = out_mad->data[32] & 0xf;
+        props->phys_state       = out_mad->data[33] >> 4;
+        props->port_cap_flags   = be32_to_cpup((__be32 *) (out_mad->data + 20));
+        props->gid_tbl_len      = to_mdev(ibdev)->dev->caps.gid_table_len;
+        props->max_msg_sz       = 0x80000000;
+        props->pkey_tbl_len     = to_mdev(ibdev)->dev->caps.pkey_table_len;
+        props->bad_pkey_cntr    = be16_to_cpup((__be16 *) (out_mad->data + 46));
+        props->qkey_viol_cntr   = be16_to_cpup((__be16 *) (out_mad->data + 48));
+        props->active_width     = out_mad->data[31] & 0xf;
+        props->active_speed     = out_mad->data[35] >> 4;
+        props->max_mtu          = out_mad->data[41] & 0xf;
+        props->active_mtu       = out_mad->data[36] >> 4;
+        props->subnet_timeout   = out_mad->data[51] & 0x1f;
+        props->max_vl_num       = out_mad->data[37] >> 4;
+        props->init_type_reply  = out_mad->data[41] >> 4;
+
+out:
+        kfree(in_mad);
+        kfree(out_mad);
+
+        return err;
+}
+
+static int mlx4_ib_query_gid(struct ib_device *ibdev, u8 port, int index,
+                             union ib_gid *gid)
+{
+        struct ib_smp *in_mad  = NULL;
+        struct ib_smp *out_mad = NULL;
+        int err = -ENOMEM;
+
+        in_mad  = kzalloc(sizeof *in_mad, GFP_KERNEL);
+        out_mad = kmalloc(sizeof *out_mad, GFP_KERNEL);
+        if (!in_mad || !out_mad)
+                goto out;
+
+        init_query_mad(in_mad);
+        in_mad->attr_id  = IB_SMP_ATTR_PORT_INFO;
+        in_mad->attr_mod = cpu_to_be32(port);
+
+        err = mlx4_MAD_IFC(to_mdev(ibdev), 1, 1, port, NULL, NULL, in_mad, out_mad);
+        if (err)
+                goto out;
+
+        memcpy(gid->raw, out_mad->data + 8, 8);
+
+        init_query_mad(in_mad);
+        in_mad->attr_id  = IB_SMP_ATTR_GUID_INFO;
+        in_mad->attr_mod = cpu_to_be32(index / 8);
+
+        err = mlx4_MAD_IFC(to_mdev(ibdev), 1, 1, port, NULL, NULL, in_mad, out_mad);
+        if (err)
+                goto out;
+
+        memcpy(gid->raw + 8, out_mad->data + (index % 8) * 8, 8);
+
+out:
+        kfree(in_mad);
+        kfree(out_mad);
+        return err;
+}
+
+static int mlx4_ib_query_pkey(struct ib_device *ibdev, u8 port, u16 index,
+                              u16 *pkey)
+{
+        struct ib_smp *in_mad  = NULL;
+        struct ib_smp *out_mad = NULL;
+        int err = -ENOMEM;
+
+        in_mad  = kzalloc(sizeof *in_mad, GFP_KERNEL);
+        out_mad = kmalloc(sizeof *out_mad, GFP_KERNEL);
+        if (!in_mad || !out_mad)
+                goto out;
+
+        init_query_mad(in_mad);
+        in_mad->attr_id  = IB_SMP_ATTR_PKEY_TABLE;
+        in_mad->attr_mod = cpu_to_be32(index / 32);
+
+        err = mlx4_MAD_IFC(to_mdev(ibdev), 1, 1, port, NULL, NULL, in_mad, out_mad);
+        if (err)
+                goto out;
+
+        *pkey = be16_to_cpu(((__be16 *) out_mad->data)[index % 32]);
+
+out:
+        kfree(in_mad);
+        kfree(out_mad);
+        return err;
+}
+
+static int mlx4_ib_modify_device(struct ib_device *ibdev, int mask,
+                                 struct ib_device_modify *props)
+{
+        if (mask & ~IB_DEVICE_MODIFY_NODE_DESC)
+                return -EOPNOTSUPP;
+
+        if (mask & IB_DEVICE_MODIFY_NODE_DESC) {
+                spin_lock(&to_mdev(ibdev)->sm_lock);
+                memcpy(ibdev->node_desc, props->node_desc, 64);
+                spin_unlock(&to_mdev(ibdev)->sm_lock);
+        }
+
+        return 0;
+}
+
+static int mlx4_SET_PORT(struct mlx4_ib_dev *dev, u8 port, int reset_qkey_viols,
+                         u32 cap_mask)
+{
+        struct mlx4_cmd_mailbox *mailbox;
+        int err;
+
+        mailbox = mlx4_alloc_cmd_mailbox(dev->dev);
+        if (IS_ERR(mailbox))
+                return PTR_ERR(mailbox);
+
+        memset(mailbox->buf, 0, 256);
+        *(u8 *) mailbox->buf         = !!reset_qkey_viols << 6;
+        ((__be32 *) mailbox->buf)[2] = cpu_to_be32(cap_mask);
+
+        err = mlx4_cmd(dev->dev, mailbox->dma, port, 0, MLX4_CMD_SET_PORT,
+                       MLX4_CMD_TIME_CLASS_B);
+
+        mlx4_free_cmd_mailbox(dev->dev, mailbox);
+        return err;
+}
+
+static int mlx4_ib_modify_port(struct ib_device *ibdev, u8 port, int mask,
+                               struct ib_port_modify *props)
+{
+        struct ib_port_attr attr;
+        u32 cap_mask;
+        int err;
+
+        mutex_lock(&to_mdev(ibdev)->cap_mask_mutex);
+
+        err = mlx4_ib_query_port(ibdev, port, &attr);
+        if (err)
+                goto out;
+
+        cap_mask = (attr.port_cap_flags | props->set_port_cap_mask) &
+                ~props->clr_port_cap_mask;
+
+        err = mlx4_SET_PORT(to_mdev(ibdev), port,
+                            !!(mask & IB_PORT_RESET_QKEY_CNTR),
+                            cap_mask);
+
+out:
+        mutex_unlock(&to_mdev(ibdev)->cap_mask_mutex);
+        return err;
+}
+
+static struct ib_ucontext *mlx4_ib_alloc_ucontext(struct ib_device *ibdev,
+                                                  struct ib_udata *udata)
+{
+        struct mlx4_ib_dev *dev = to_mdev(ibdev);
+        struct mlx4_ib_ucontext *context;
+        struct mlx4_ib_alloc_ucontext_resp resp;
+        int err;
+
+        resp.qp_tab_size      = dev->dev->caps.num_qps;
+        resp.bf_reg_size      = dev->dev->caps.bf_reg_size;
+        resp.bf_regs_per_page = dev->dev->caps.bf_regs_per_page;
+
+        context = kmalloc(sizeof *context, GFP_KERNEL);
+        if (!context)
+                return ERR_PTR(-ENOMEM);
+
+        err = mlx4_uar_alloc(to_mdev(ibdev)->dev, &context->uar);
+        if (err) {
+                kfree(context);
+                return ERR_PTR(err);
+        }
+
+        INIT_LIST_HEAD(&context->db_page_list);
+        mutex_init(&context->db_page_mutex);
+
+        err = ib_copy_to_udata(udata, &resp, sizeof resp);
+        if (err) {
+                mlx4_uar_free(to_mdev(ibdev)->dev, &context->uar);
+                kfree(context);
+                return ERR_PTR(-EFAULT);
+        }
+
+        return &context->ibucontext;
+}
+
+static int mlx4_ib_dealloc_ucontext(struct ib_ucontext *ibcontext)
+{
+        struct mlx4_ib_ucontext *context = to_mucontext(ibcontext);
+
+        mlx4_uar_free(to_mdev(ibcontext->device)->dev, &context->uar);
+        kfree(context);
+
+        return 0;
+}
+
+static int mlx4_ib_mmap(struct ib_ucontext *context, struct vm_area_struct *vma)
+{
+        struct mlx4_ib_dev *dev = to_mdev(context->device);
+
+        if (vma->vm_end - vma->vm_start != PAGE_SIZE)
+                return -EINVAL;
+
+        if (vma->vm_pgoff == 0) {
+                vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
+
+                if (io_remap_pfn_range(vma, vma->vm_start,
+                                       to_mucontext(context)->uar.pfn,
+                                       PAGE_SIZE, vma->vm_page_prot))
+                        return -EAGAIN;
+        } else if (vma->vm_pgoff == 1 && dev->dev->caps.bf_reg_size != 0) {
+                /* FIXME want pgprot_writecombine() for BlueFlame pages */
+                vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
+
+                if (io_remap_pfn_range(vma, vma->vm_start,
+                                       to_mucontext(context)->uar.pfn +
+                                       dev->dev->caps.num_uars,
+                                       PAGE_SIZE, vma->vm_page_prot))
+                        return -EAGAIN;
+        } else
+                return -EINVAL;
+
+        return 0;
+}
+
+static struct ib_pd *mlx4_ib_alloc_pd(struct ib_device *ibdev,
+                                      struct ib_ucontext *context,
+                                      struct ib_udata *udata)
+{
+        struct mlx4_ib_pd *pd;
+        int err;
+
+        pd = kmalloc(sizeof *pd, GFP_KERNEL);
+        if (!pd)
+                return ERR_PTR(-ENOMEM);
+
+        err = mlx4_pd_alloc(to_mdev(ibdev)->dev, &pd->pdn);
+        if (err) {
+                kfree(pd);
+                return ERR_PTR(err);
+        }
+
+        if (context)
+                if (ib_copy_to_udata(udata, &pd->pdn, sizeof (__u32))) {
+                        mlx4_pd_free(to_mdev(ibdev)->dev, pd->pdn);
+                        kfree(pd);
+                        return ERR_PTR(-EFAULT);
+                }
+
+        return &pd->ibpd;
+}
+
+static int mlx4_ib_dealloc_pd(struct ib_pd *pd)
+{
+        mlx4_pd_free(to_mdev(pd->device)->dev, to_mpd(pd)->pdn);
+        kfree(pd);
+
+        return 0;
+}
+
+static int mlx4_ib_mcg_attach(struct ib_qp *ibqp, union ib_gid *gid, u16 lid)
+{
+        return mlx4_multicast_attach(to_mdev(ibqp->device)->dev,
+                                     &to_mqp(ibqp)->mqp, gid->raw);
+}
+
+static int mlx4_ib_mcg_detach(struct ib_qp *ibqp, union ib_gid *gid, u16 lid)
+{
+        return mlx4_multicast_detach(to_mdev(ibqp->device)->dev,
+                                     &to_mqp(ibqp)->mqp, gid->raw);
+}
+
+static int init_node_data(struct mlx4_ib_dev *dev)
+{
+        struct ib_smp *in_mad  = NULL;
+        struct ib_smp *out_mad = NULL;
+        int err = -ENOMEM;
+
+        in_mad  = kzalloc(sizeof *in_mad, GFP_KERNEL);
+        out_mad = kmalloc(sizeof *out_mad, GFP_KERNEL);
+        if (!in_mad || !out_mad)
+                goto out;
+
+        init_query_mad(in_mad);
+        in_mad->attr_id = IB_SMP_ATTR_NODE_DESC;
+
+        err = mlx4_MAD_IFC(dev, 1, 1, 1, NULL, NULL, in_mad, out_mad);
+        if (err)
+                goto out;
+
+        memcpy(dev->ib_dev.node_desc, out_mad->data, 64);
+
+        in_mad->attr_id = IB_SMP_ATTR_NODE_INFO;
+
+        err = mlx4_MAD_IFC(dev, 1, 1, 1, NULL, NULL, in_mad, out_mad);
+        if (err)
+                goto out;
+
+        memcpy(&dev->ib_dev.node_guid, out_mad->data + 12, 8);
+
+out:
+        kfree(in_mad);
+        kfree(out_mad);
+        return err;
+}
+
+static void *mlx4_ib_add(struct mlx4_dev *dev)
+{
+        struct mlx4_ib_dev *ibdev;
+
+        ibdev = (struct mlx4_ib_dev *) ib_alloc_device(sizeof *ibdev);
+        if (!ibdev) {
+                dev_err(&dev->pdev->dev, "Device struct alloc failed\n");
+                return NULL;
+        }
+
+        if (mlx4_pd_alloc(dev, &ibdev->priv_pdn))
+                goto err_dealloc;
+
+        if (mlx4_uar_alloc(dev, &ibdev->priv_uar))
+                goto err_pd;
+
+        ibdev->uar_map = ioremap(ibdev->priv_uar.pfn << PAGE_SHIFT, PAGE_SIZE);
+        if (!ibdev->uar_map)
+                goto err_uar;
+
+        INIT_LIST_HEAD(&ibdev->pgdir_list);
+        mutex_init(&ibdev->pgdir_mutex);
+
+        ibdev->dev = dev;
+
+        strlcpy(ibdev->ib_dev.name, "mlx4_%d", IB_DEVICE_NAME_MAX);
+        ibdev->ib_dev.owner             = THIS_MODULE;
+        ibdev->ib_dev.node_type         = RDMA_NODE_IB_CA;
+        ibdev->ib_dev.phys_port_cnt     = dev->caps.num_ports;
+        ibdev->ib_dev.num_comp_vectors  = 1;
+        ibdev->ib_dev.dma_device        = &dev->pdev->dev;
+
+        ibdev->ib_dev.uverbs_abi_ver    = MLX4_IB_UVERBS_ABI_VERSION;
+        ibdev->ib_dev.uverbs_cmd_mask   =
+                (1ull << IB_USER_VERBS_CMD_GET_CONTEXT)         |
+                (1ull << IB_USER_VERBS_CMD_QUERY_DEVICE)        |
+                (1ull << IB_USER_VERBS_CMD_QUERY_PORT)          |
+                (1ull << IB_USER_VERBS_CMD_ALLOC_PD)            |
+                (1ull << IB_USER_VERBS_CMD_DEALLOC_PD)          |
+                (1ull << IB_USER_VERBS_CMD_REG_MR)              |
+                (1ull << IB_USER_VERBS_CMD_DEREG_MR)            |
+                (1ull << IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL) |
+                (1ull << IB_USER_VERBS_CMD_CREATE_CQ)           |
+                (1ull << IB_USER_VERBS_CMD_DESTROY_CQ)          |
+                (1ull << IB_USER_VERBS_CMD_CREATE_QP)           |
+                (1ull << IB_USER_VERBS_CMD_MODIFY_QP)           |
+                (1ull << IB_USER_VERBS_CMD_DESTROY_QP)          |
+                (1ull << IB_USER_VERBS_CMD_ATTACH_MCAST)        |
+                (1ull << IB_USER_VERBS_CMD_DETACH_MCAST)        |
+                (1ull << IB_USER_VERBS_CMD_CREATE_SRQ)          |
+                (1ull << IB_USER_VERBS_CMD_MODIFY_SRQ)          |
+                (1ull << IB_USER_VERBS_CMD_DESTROY_SRQ);
+
+        ibdev->ib_dev.query_device      = mlx4_ib_query_device;
+        ibdev->ib_dev.query_port        = mlx4_ib_query_port;
+        ibdev->ib_dev.query_gid         = mlx4_ib_query_gid;
+        ibdev->ib_dev.query_pkey        = mlx4_ib_query_pkey;
+        ibdev->ib_dev.modify_device     = mlx4_ib_modify_device;
+        ibdev->ib_dev.modify_port       = mlx4_ib_modify_port;
+        ibdev->ib_dev.alloc_ucontext    = mlx4_ib_alloc_ucontext;
+        ibdev->ib_dev.dealloc_ucontext  = mlx4_ib_dealloc_ucontext;
+        ibdev->ib_dev.mmap              = mlx4_ib_mmap;
+        ibdev->ib_dev.alloc_pd          = mlx4_ib_alloc_pd;
+        ibdev->ib_dev.dealloc_pd        = mlx4_ib_dealloc_pd;
+        ibdev->ib_dev.create_ah         = mlx4_ib_create_ah;
+        ibdev->ib_dev.query_ah          = mlx4_ib_query_ah;
+        ibdev->ib_dev.destroy_ah        = mlx4_ib_destroy_ah;
+        ibdev->ib_dev.create_srq        = mlx4_ib_create_srq;
+        ibdev->ib_dev.modify_srq        = mlx4_ib_modify_srq;
+        ibdev->ib_dev.destroy_srq       = mlx4_ib_destroy_srq;
+        ibdev->ib_dev.post_srq_recv     = mlx4_ib_post_srq_recv;
+        ibdev->ib_dev.create_qp         = mlx4_ib_create_qp;
+        ibdev->ib_dev.modify_qp         = mlx4_ib_modify_qp;
+        ibdev->ib_dev.destroy_qp        = mlx4_ib_destroy_qp;
+        ibdev->ib_dev.post_send         = mlx4_ib_post_send;
+        ibdev->ib_dev.post_recv         = mlx4_ib_post_recv;
+        ibdev->ib_dev.create_cq         = mlx4_ib_create_cq;
+        ibdev->ib_dev.destroy_cq        = mlx4_ib_destroy_cq;
+        ibdev->ib_dev.poll_cq           = mlx4_ib_poll_cq;
+        ibdev->ib_dev.req_notify_cq     = mlx4_ib_arm_cq;
+        ibdev->ib_dev.get_dma_mr        = mlx4_ib_get_dma_mr;
+        ibdev->ib_dev.reg_user_mr       = mlx4_ib_reg_user_mr;
+        ibdev->ib_dev.dereg_mr          = mlx4_ib_dereg_mr;
+        ibdev->ib_dev.attach_mcast      = mlx4_ib_mcg_attach;
+        ibdev->ib_dev.detach_mcast      = mlx4_ib_mcg_detach;
+        ibdev->ib_dev.process_mad       = mlx4_ib_process_mad;
+
+        if (init_node_data(ibdev))
+                goto err_map;
+
+        spin_lock_init(&ibdev->sm_lock);
+        mutex_init(&ibdev->cap_mask_mutex);
+
+        if (ib_register_device(&ibdev->ib_dev))
+                goto err_map;
+
+        if (mlx4_ib_mad_init(ibdev))
+                goto err_reg;
+
+        return ibdev;
+
+err_reg:
+        ib_unregister_device(&ibdev->ib_dev);
+
+err_map:
+        iounmap(ibdev->uar_map);
+
+err_uar:
+        mlx4_uar_free(dev, &ibdev->priv_uar);
+
+err_pd:
+        mlx4_pd_free(dev, ibdev->priv_pdn);
+
+err_dealloc:
+        ib_dealloc_device(&ibdev->ib_dev);
+
+        return NULL;
+}
+
+static void mlx4_ib_remove(struct mlx4_dev *dev, void *ibdev_ptr)
+{
+        struct mlx4_ib_dev *ibdev = ibdev_ptr;
+        int p;
+
+        for (p = 1; p <= dev->caps.num_ports; ++p)
+                mlx4_CLOSE_PORT(dev, p);
+
+        mlx4_ib_mad_cleanup(ibdev);
+        ib_unregister_device(&ibdev->ib_dev);
+        iounmap(ibdev->uar_map);
+        mlx4_uar_free(dev, &ibdev->priv_uar);
+        mlx4_pd_free(dev, ibdev->priv_pdn);
+        ib_dealloc_device(&ibdev->ib_dev);
+}
+
+static void mlx4_ib_event(struct mlx4_dev *dev, void *ibdev_ptr,
+                          enum mlx4_dev_event event, int subtype,
+                          int port)
+{
+        struct ib_event ibev;
+
+        switch (event) {
+        case MLX4_EVENT_TYPE_PORT_CHANGE:
+                ibev.event = subtype == MLX4_PORT_CHANGE_SUBTYPE_ACTIVE ?
+                        IB_EVENT_PORT_ACTIVE : IB_EVENT_PORT_ERR;
+                break;
+
+        case MLX4_EVENT_TYPE_LOCAL_CATAS_ERROR:
+                ibev.event = IB_EVENT_DEVICE_FATAL;
+                break;
+
+        default:
+                return;
+        }
+
+        ibev.device           = ibdev_ptr;
+        ibev.element.port_num = port;
+
+        ib_dispatch_event(&ibev);
+}
+
+static struct mlx4_interface mlx4_ib_interface = {
+        .add    = mlx4_ib_add,
+        .remove = mlx4_ib_remove,
+        .event  = mlx4_ib_event
+};
+
+static int __init mlx4_ib_init(void)
+{
+        return mlx4_register_interface(&mlx4_ib_interface);
+}
+
+static void __exit mlx4_ib_cleanup(void)
+{
+        mlx4_unregister_interface(&mlx4_ib_interface);
+}
+
+module_init(mlx4_ib_init);
+module_exit(mlx4_ib_cleanup);