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main.c

/*
 * 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 - 1;
      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[1];
      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[port];
      props->max_msg_sz = to_mdev(ibdev)->dev->caps.max_msg_sz;
      props->pkey_tbl_len     = to_mdev(ibdev)->dev->caps.pkey_table_len[port];
      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);

      if (dev->dev->flags & MLX4_FLAG_OLD_PORT_CMDS) {
            *(u8 *) mailbox->buf         = !!reset_qkey_viols << 6;
            ((__be32 *) mailbox->buf)[2] = cpu_to_be32(cap_mask);
      } else {
            ((u8 *) mailbox->buf)[3]     = !!reset_qkey_viols;
            ((__be32 *) mailbox->buf)[1] = 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 ssize_t show_hca(struct class_device *cdev, char *buf)
{
      struct mlx4_ib_dev *dev = container_of(cdev, struct mlx4_ib_dev, ib_dev.class_dev);
      return sprintf(buf, "MT%d\n", dev->dev->pdev->device);
}

static ssize_t show_fw_ver(struct class_device *cdev, char *buf)
{
      struct mlx4_ib_dev *dev = container_of(cdev, struct mlx4_ib_dev, ib_dev.class_dev);
      return sprintf(buf, "%d.%d.%d\n", (int) (dev->dev->caps.fw_ver >> 32),
                   (int) (dev->dev->caps.fw_ver >> 16) & 0xffff,
                   (int) dev->dev->caps.fw_ver & 0xffff);
}

static ssize_t show_rev(struct class_device *cdev, char *buf)
{
      struct mlx4_ib_dev *dev = container_of(cdev, struct mlx4_ib_dev, ib_dev.class_dev);
      return sprintf(buf, "%x\n", dev->dev->rev_id);
}

static ssize_t show_board(struct class_device *cdev, char *buf)
{
      struct mlx4_ib_dev *dev = container_of(cdev, struct mlx4_ib_dev, ib_dev.class_dev);
      return sprintf(buf, "%.*s\n", MLX4_BOARD_ID_LEN, dev->dev->board_id);
}

static CLASS_DEVICE_ATTR(hw_rev,   S_IRUGO, show_rev,    NULL);
static CLASS_DEVICE_ATTR(fw_ver,   S_IRUGO, show_fw_ver, NULL);
static CLASS_DEVICE_ATTR(hca_type, S_IRUGO, show_hca,    NULL);
static CLASS_DEVICE_ATTR(board_id, S_IRUGO, show_board,  NULL);

static struct class_device_attribute *mlx4_class_attributes[] = {
      &class_device_attr_hw_rev,
      &class_device_attr_fw_ver,
      &class_device_attr_hca_type,
      &class_device_attr_board_id
};

static void *mlx4_ib_add(struct mlx4_dev *dev)
{
      struct mlx4_ib_dev *ibdev;
      int i;

      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;
      MLX4_INIT_DOORBELL_LOCK(&ibdev->uar_lock);

      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_QUERY_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_QUERY_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.query_srq       = mlx4_ib_query_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.query_qp        = mlx4_ib_query_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;

      ibdev->ib_dev.alloc_fmr       = mlx4_ib_fmr_alloc;
      ibdev->ib_dev.map_phys_fmr    = mlx4_ib_map_phys_fmr;
      ibdev->ib_dev.unmap_fmr       = mlx4_ib_unmap_fmr;
      ibdev->ib_dev.dealloc_fmr     = mlx4_ib_fmr_dealloc;

      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;

      for (i = 0; i < ARRAY_SIZE(mlx4_class_attributes); ++i) {
            if (class_device_create_file(&ibdev->ib_dev.class_dev,
                                     mlx4_class_attributes[i]))
                  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);

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