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c2_provider.c

/*
 * Copyright (c) 2005 Ammasso, Inc. All rights reserved.
 * Copyright (c) 2005 Open Grid Computing, 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/moduleparam.h>
#include <linux/pci.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/inetdevice.h>
#include <linux/delay.h>
#include <linux/ethtool.h>
#include <linux/mii.h>
#include <linux/if_vlan.h>
#include <linux/crc32.h>
#include <linux/in.h>
#include <linux/ip.h>
#include <linux/tcp.h>
#include <linux/init.h>
#include <linux/dma-mapping.h>
#include <linux/if_arp.h>
#include <linux/vmalloc.h>

#include <asm/io.h>
#include <asm/irq.h>
#include <asm/byteorder.h>

#include <rdma/ib_smi.h>
#include <rdma/ib_umem.h>
#include <rdma/ib_user_verbs.h>
#include "c2.h"
#include "c2_provider.h"
#include "c2_user.h"

static int c2_query_device(struct ib_device *ibdev,
                     struct ib_device_attr *props)
{
      struct c2_dev *c2dev = to_c2dev(ibdev);

      pr_debug("%s:%u\n", __FUNCTION__, __LINE__);

      *props = c2dev->props;
      return 0;
}

static int c2_query_port(struct ib_device *ibdev,
                   u8 port, struct ib_port_attr *props)
{
      pr_debug("%s:%u\n", __FUNCTION__, __LINE__);

      props->max_mtu = IB_MTU_4096;
      props->lid = 0;
      props->lmc = 0;
      props->sm_lid = 0;
      props->sm_sl = 0;
      props->state = IB_PORT_ACTIVE;
      props->phys_state = 0;
      props->port_cap_flags =
          IB_PORT_CM_SUP |
          IB_PORT_REINIT_SUP |
          IB_PORT_VENDOR_CLASS_SUP | IB_PORT_BOOT_MGMT_SUP;
      props->gid_tbl_len = 1;
      props->pkey_tbl_len = 1;
      props->qkey_viol_cntr = 0;
      props->active_width = 1;
      props->active_speed = 1;

      return 0;
}

static int c2_modify_port(struct ib_device *ibdev,
                    u8 port, int port_modify_mask,
                    struct ib_port_modify *props)
{
      pr_debug("%s:%u\n", __FUNCTION__, __LINE__);
      return 0;
}

static int c2_query_pkey(struct ib_device *ibdev,
                   u8 port, u16 index, u16 * pkey)
{
      pr_debug("%s:%u\n", __FUNCTION__, __LINE__);
      *pkey = 0;
      return 0;
}

static int c2_query_gid(struct ib_device *ibdev, u8 port,
                  int index, union ib_gid *gid)
{
      struct c2_dev *c2dev = to_c2dev(ibdev);

      pr_debug("%s:%u\n", __FUNCTION__, __LINE__);
      memset(&(gid->raw[0]), 0, sizeof(gid->raw));
      memcpy(&(gid->raw[0]), c2dev->pseudo_netdev->dev_addr, 6);

      return 0;
}

/* Allocate the user context data structure. This keeps track
 * of all objects associated with a particular user-mode client.
 */
static struct ib_ucontext *c2_alloc_ucontext(struct ib_device *ibdev,
                                   struct ib_udata *udata)
{
      struct c2_ucontext *context;

      pr_debug("%s:%u\n", __FUNCTION__, __LINE__);
      context = kmalloc(sizeof(*context), GFP_KERNEL);
      if (!context)
            return ERR_PTR(-ENOMEM);

      return &context->ibucontext;
}

static int c2_dealloc_ucontext(struct ib_ucontext *context)
{
      pr_debug("%s:%u\n", __FUNCTION__, __LINE__);
      kfree(context);
      return 0;
}

static int c2_mmap_uar(struct ib_ucontext *context, struct vm_area_struct *vma)
{
      pr_debug("%s:%u\n", __FUNCTION__, __LINE__);
      return -ENOSYS;
}

static struct ib_pd *c2_alloc_pd(struct ib_device *ibdev,
                         struct ib_ucontext *context,
                         struct ib_udata *udata)
{
      struct c2_pd *pd;
      int err;

      pr_debug("%s:%u\n", __FUNCTION__, __LINE__);

      pd = kmalloc(sizeof(*pd), GFP_KERNEL);
      if (!pd)
            return ERR_PTR(-ENOMEM);

      err = c2_pd_alloc(to_c2dev(ibdev), !context, pd);
      if (err) {
            kfree(pd);
            return ERR_PTR(err);
      }

      if (context) {
            if (ib_copy_to_udata(udata, &pd->pd_id, sizeof(__u32))) {
                  c2_pd_free(to_c2dev(ibdev), pd);
                  kfree(pd);
                  return ERR_PTR(-EFAULT);
            }
      }

      return &pd->ibpd;
}

static int c2_dealloc_pd(struct ib_pd *pd)
{
      pr_debug("%s:%u\n", __FUNCTION__, __LINE__);
      c2_pd_free(to_c2dev(pd->device), to_c2pd(pd));
      kfree(pd);

      return 0;
}

static struct ib_ah *c2_ah_create(struct ib_pd *pd, struct ib_ah_attr *ah_attr)
{
      pr_debug("%s:%u\n", __FUNCTION__, __LINE__);
      return ERR_PTR(-ENOSYS);
}

static int c2_ah_destroy(struct ib_ah *ah)
{
      pr_debug("%s:%u\n", __FUNCTION__, __LINE__);
      return -ENOSYS;
}

static void c2_add_ref(struct ib_qp *ibqp)
{
      struct c2_qp *qp;
      BUG_ON(!ibqp);
      qp = to_c2qp(ibqp);
      atomic_inc(&qp->refcount);
}

static void c2_rem_ref(struct ib_qp *ibqp)
{
      struct c2_qp *qp;
      BUG_ON(!ibqp);
      qp = to_c2qp(ibqp);
      if (atomic_dec_and_test(&qp->refcount))
            wake_up(&qp->wait);
}

struct ib_qp *c2_get_qp(struct ib_device *device, int qpn)
{
      struct c2_dev* c2dev = to_c2dev(device);
      struct c2_qp *qp;

      qp = c2_find_qpn(c2dev, qpn);
      pr_debug("%s Returning QP=%p for QPN=%d, device=%p, refcount=%d\n",
            __FUNCTION__, qp, qpn, device,
            (qp?atomic_read(&qp->refcount):0));

      return (qp?&qp->ibqp:NULL);
}

static struct ib_qp *c2_create_qp(struct ib_pd *pd,
                          struct ib_qp_init_attr *init_attr,
                          struct ib_udata *udata)
{
      struct c2_qp *qp;
      int err;

      pr_debug("%s:%u\n", __FUNCTION__, __LINE__);

      switch (init_attr->qp_type) {
      case IB_QPT_RC:
            qp = kzalloc(sizeof(*qp), GFP_KERNEL);
            if (!qp) {
                  pr_debug("%s: Unable to allocate QP\n", __FUNCTION__);
                  return ERR_PTR(-ENOMEM);
            }
            spin_lock_init(&qp->lock);
            if (pd->uobject) {
                  /* userspace specific */
            }

            err = c2_alloc_qp(to_c2dev(pd->device),
                          to_c2pd(pd), init_attr, qp);

            if (err && pd->uobject) {
                  /* userspace specific */
            }

            break;
      default:
            pr_debug("%s: Invalid QP type: %d\n", __FUNCTION__,
                  init_attr->qp_type);
            return ERR_PTR(-EINVAL);
            break;
      }

      if (err) {
            kfree(qp);
            return ERR_PTR(err);
      }

      return &qp->ibqp;
}

static int c2_destroy_qp(struct ib_qp *ib_qp)
{
      struct c2_qp *qp = to_c2qp(ib_qp);

      pr_debug("%s:%u qp=%p,qp->state=%d\n",
            __FUNCTION__, __LINE__,ib_qp,qp->state);
      c2_free_qp(to_c2dev(ib_qp->device), qp);
      kfree(qp);
      return 0;
}

static struct ib_cq *c2_create_cq(struct ib_device *ibdev, int entries, int vector,
                          struct ib_ucontext *context,
                          struct ib_udata *udata)
{
      struct c2_cq *cq;
      int err;

      cq = kmalloc(sizeof(*cq), GFP_KERNEL);
      if (!cq) {
            pr_debug("%s: Unable to allocate CQ\n", __FUNCTION__);
            return ERR_PTR(-ENOMEM);
      }

      err = c2_init_cq(to_c2dev(ibdev), entries, NULL, cq);
      if (err) {
            pr_debug("%s: error initializing CQ\n", __FUNCTION__);
            kfree(cq);
            return ERR_PTR(err);
      }

      return &cq->ibcq;
}

static int c2_destroy_cq(struct ib_cq *ib_cq)
{
      struct c2_cq *cq = to_c2cq(ib_cq);

      pr_debug("%s:%u\n", __FUNCTION__, __LINE__);

      c2_free_cq(to_c2dev(ib_cq->device), cq);
      kfree(cq);

      return 0;
}

static inline u32 c2_convert_access(int acc)
{
      return (acc & IB_ACCESS_REMOTE_WRITE ? C2_ACF_REMOTE_WRITE : 0) |
          (acc & IB_ACCESS_REMOTE_READ ? C2_ACF_REMOTE_READ : 0) |
          (acc & IB_ACCESS_LOCAL_WRITE ? C2_ACF_LOCAL_WRITE : 0) |
          C2_ACF_LOCAL_READ | C2_ACF_WINDOW_BIND;
}

static struct ib_mr *c2_reg_phys_mr(struct ib_pd *ib_pd,
                            struct ib_phys_buf *buffer_list,
                            int num_phys_buf, int acc, u64 * iova_start)
{
      struct c2_mr *mr;
      u64 *page_list;
      u32 total_len;
      int err, i, j, k, page_shift, pbl_depth;

      pbl_depth = 0;
      total_len = 0;

      page_shift = PAGE_SHIFT;
      /*
       * If there is only 1 buffer we assume this could
       * be a map of all phy mem...use a 32k page_shift.
       */
      if (num_phys_buf == 1)
            page_shift += 3;

      for (i = 0; i < num_phys_buf; i++) {

            if (buffer_list[i].addr & ~PAGE_MASK) {
                  pr_debug("Unaligned Memory Buffer: 0x%x\n",
                        (unsigned int) buffer_list[i].addr);
                  return ERR_PTR(-EINVAL);
            }

            if (!buffer_list[i].size) {
                  pr_debug("Invalid Buffer Size\n");
                  return ERR_PTR(-EINVAL);
            }

            total_len += buffer_list[i].size;
            pbl_depth += ALIGN(buffer_list[i].size,
                           (1 << page_shift)) >> page_shift;
      }

      page_list = vmalloc(sizeof(u64) * pbl_depth);
      if (!page_list) {
            pr_debug("couldn't vmalloc page_list of size %zd\n",
                  (sizeof(u64) * pbl_depth));
            return ERR_PTR(-ENOMEM);
      }

      for (i = 0, j = 0; i < num_phys_buf; i++) {

            int naddrs;

            naddrs = ALIGN(buffer_list[i].size,
                         (1 << page_shift)) >> page_shift;
            for (k = 0; k < naddrs; k++)
                  page_list[j++] = (buffer_list[i].addr +
                                         (k << page_shift));
      }

      mr = kmalloc(sizeof(*mr), GFP_KERNEL);
      if (!mr) {
            vfree(page_list);
            return ERR_PTR(-ENOMEM);
      }

      mr->pd = to_c2pd(ib_pd);
      mr->umem = NULL;
      pr_debug("%s - page shift %d, pbl_depth %d, total_len %u, "
            "*iova_start %llx, first pa %llx, last pa %llx\n",
            __FUNCTION__, page_shift, pbl_depth, total_len,
            (unsigned long long) *iova_start,
                  (unsigned long long) page_list[0],
                  (unsigned long long) page_list[pbl_depth-1]);
      err = c2_nsmr_register_phys_kern(to_c2dev(ib_pd->device), page_list,
                               (1 << page_shift), pbl_depth,
                               total_len, 0, iova_start,
                               c2_convert_access(acc), mr);
      vfree(page_list);
      if (err) {
            kfree(mr);
            return ERR_PTR(err);
      }

      return &mr->ibmr;
}

static struct ib_mr *c2_get_dma_mr(struct ib_pd *pd, int acc)
{
      struct ib_phys_buf bl;
      u64 kva = 0;

      pr_debug("%s:%u\n", __FUNCTION__, __LINE__);

      /* AMSO1100 limit */
      bl.size = 0xffffffff;
      bl.addr = 0;
      return c2_reg_phys_mr(pd, &bl, 1, acc, &kva);
}

static struct ib_mr *c2_reg_user_mr(struct ib_pd *pd, u64 start, u64 length,
                            u64 virt, int acc, struct ib_udata *udata)
{
      u64 *pages;
      u64 kva = 0;
      int shift, n, len;
      int i, j, k;
      int err = 0;
      struct ib_umem_chunk *chunk;
      struct c2_pd *c2pd = to_c2pd(pd);
      struct c2_mr *c2mr;

      pr_debug("%s:%u\n", __FUNCTION__, __LINE__);

      c2mr = kmalloc(sizeof(*c2mr), GFP_KERNEL);
      if (!c2mr)
            return ERR_PTR(-ENOMEM);
      c2mr->pd = c2pd;

      c2mr->umem = ib_umem_get(pd->uobject->context, start, length, acc);
      if (IS_ERR(c2mr->umem)) {
            err = PTR_ERR(c2mr->umem);
            kfree(c2mr);
            return ERR_PTR(err);
      }

      shift = ffs(c2mr->umem->page_size) - 1;

      n = 0;
      list_for_each_entry(chunk, &c2mr->umem->chunk_list, list)
            n += chunk->nents;

      pages = kmalloc(n * sizeof(u64), GFP_KERNEL);
      if (!pages) {
            err = -ENOMEM;
            goto err;
      }

      i = 0;
      list_for_each_entry(chunk, &c2mr->umem->chunk_list, list) {
            for (j = 0; j < chunk->nmap; ++j) {
                  len = sg_dma_len(&chunk->page_list[j]) >> shift;
                  for (k = 0; k < len; ++k) {
                        pages[i++] =
                              sg_dma_address(&chunk->page_list[j]) +
                              (c2mr->umem->page_size * k);
                  }
            }
      }

      kva = virt;
      err = c2_nsmr_register_phys_kern(to_c2dev(pd->device),
                               pages,
                               c2mr->umem->page_size,
                               i,
                               length,
                               c2mr->umem->offset,
                               &kva,
                               c2_convert_access(acc),
                               c2mr);
      kfree(pages);
      if (err)
            goto err;
      return &c2mr->ibmr;

err:
      ib_umem_release(c2mr->umem);
      kfree(c2mr);
      return ERR_PTR(err);
}

static int c2_dereg_mr(struct ib_mr *ib_mr)
{
      struct c2_mr *mr = to_c2mr(ib_mr);
      int err;

      pr_debug("%s:%u\n", __FUNCTION__, __LINE__);

      err = c2_stag_dealloc(to_c2dev(ib_mr->device), ib_mr->lkey);
      if (err)
            pr_debug("c2_stag_dealloc failed: %d\n", err);
      else {
            if (mr->umem)
                  ib_umem_release(mr->umem);
            kfree(mr);
      }

      return err;
}

static ssize_t show_rev(struct class_device *cdev, char *buf)
{
      struct c2_dev *dev = container_of(cdev, struct c2_dev, ibdev.class_dev);
      pr_debug("%s:%u\n", __FUNCTION__, __LINE__);
      return sprintf(buf, "%x\n", dev->props.hw_ver);
}

static ssize_t show_fw_ver(struct class_device *cdev, char *buf)
{
      struct c2_dev *dev = container_of(cdev, struct c2_dev, ibdev.class_dev);
      pr_debug("%s:%u\n", __FUNCTION__, __LINE__);
      return sprintf(buf, "%x.%x.%x\n",
                   (int) (dev->props.fw_ver >> 32),
                   (int) (dev->props.fw_ver >> 16) & 0xffff,
                   (int) (dev->props.fw_ver & 0xffff));
}

static ssize_t show_hca(struct class_device *cdev, char *buf)
{
      pr_debug("%s:%u\n", __FUNCTION__, __LINE__);
      return sprintf(buf, "AMSO1100\n");
}

static ssize_t show_board(struct class_device *cdev, char *buf)
{
      pr_debug("%s:%u\n", __FUNCTION__, __LINE__);
      return sprintf(buf, "%.*s\n", 32, "AMSO1100 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 *c2_class_attributes[] = {
      &class_device_attr_hw_rev,
      &class_device_attr_fw_ver,
      &class_device_attr_hca_type,
      &class_device_attr_board_id
};

static int c2_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
                  int attr_mask, struct ib_udata *udata)
{
      int err;

      err =
          c2_qp_modify(to_c2dev(ibqp->device), to_c2qp(ibqp), attr,
                   attr_mask);

      return err;
}

static int c2_multicast_attach(struct ib_qp *ibqp, union ib_gid *gid, u16 lid)
{
      pr_debug("%s:%u\n", __FUNCTION__, __LINE__);
      return -ENOSYS;
}

static int c2_multicast_detach(struct ib_qp *ibqp, union ib_gid *gid, u16 lid)
{
      pr_debug("%s:%u\n", __FUNCTION__, __LINE__);
      return -ENOSYS;
}

static int c2_process_mad(struct ib_device *ibdev,
                    int mad_flags,
                    u8 port_num,
                    struct ib_wc *in_wc,
                    struct ib_grh *in_grh,
                    struct ib_mad *in_mad, struct ib_mad *out_mad)
{
      pr_debug("%s:%u\n", __FUNCTION__, __LINE__);
      return -ENOSYS;
}

static int c2_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *iw_param)
{
      pr_debug("%s:%u\n", __FUNCTION__, __LINE__);

      /* Request a connection */
      return c2_llp_connect(cm_id, iw_param);
}

static int c2_accept(struct iw_cm_id *cm_id, struct iw_cm_conn_param *iw_param)
{
      pr_debug("%s:%u\n", __FUNCTION__, __LINE__);

      /* Accept the new connection */
      return c2_llp_accept(cm_id, iw_param);
}

static int c2_reject(struct iw_cm_id *cm_id, const void *pdata, u8 pdata_len)
{
      int err;

      pr_debug("%s:%u\n", __FUNCTION__, __LINE__);

      err = c2_llp_reject(cm_id, pdata, pdata_len);
      return err;
}

static int c2_service_create(struct iw_cm_id *cm_id, int backlog)
{
      int err;

      pr_debug("%s:%u\n", __FUNCTION__, __LINE__);
      err = c2_llp_service_create(cm_id, backlog);
      pr_debug("%s:%u err=%d\n",
            __FUNCTION__, __LINE__,
            err);
      return err;
}

static int c2_service_destroy(struct iw_cm_id *cm_id)
{
      int err;
      pr_debug("%s:%u\n", __FUNCTION__, __LINE__);

      err = c2_llp_service_destroy(cm_id);

      return err;
}

static int c2_pseudo_up(struct net_device *netdev)
{
      struct in_device *ind;
      struct c2_dev *c2dev = netdev->priv;

      ind = in_dev_get(netdev);
      if (!ind)
            return 0;

      pr_debug("adding...\n");
      for_ifa(ind) {
#ifdef DEBUG
            u8 *ip = (u8 *) & ifa->ifa_address;

            pr_debug("%s: %d.%d.%d.%d\n",
                   ifa->ifa_label, ip[0], ip[1], ip[2], ip[3]);
#endif
            c2_add_addr(c2dev, ifa->ifa_address, ifa->ifa_mask);
      }
      endfor_ifa(ind);
      in_dev_put(ind);

      return 0;
}

static int c2_pseudo_down(struct net_device *netdev)
{
      struct in_device *ind;
      struct c2_dev *c2dev = netdev->priv;

      ind = in_dev_get(netdev);
      if (!ind)
            return 0;

      pr_debug("deleting...\n");
      for_ifa(ind) {
#ifdef DEBUG
            u8 *ip = (u8 *) & ifa->ifa_address;

            pr_debug("%s: %d.%d.%d.%d\n",
                   ifa->ifa_label, ip[0], ip[1], ip[2], ip[3]);
#endif
            c2_del_addr(c2dev, ifa->ifa_address, ifa->ifa_mask);
      }
      endfor_ifa(ind);
      in_dev_put(ind);

      return 0;
}

static int c2_pseudo_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
{
      kfree_skb(skb);
      return NETDEV_TX_OK;
}

static int c2_pseudo_change_mtu(struct net_device *netdev, int new_mtu)
{
      int ret = 0;

      if (new_mtu < ETH_ZLEN || new_mtu > ETH_JUMBO_MTU)
            return -EINVAL;

      netdev->mtu = new_mtu;

      /* TODO: Tell rnic about new rmda interface mtu */
      return ret;
}

static void setup(struct net_device *netdev)
{
      netdev->open = c2_pseudo_up;
      netdev->stop = c2_pseudo_down;
      netdev->hard_start_xmit = c2_pseudo_xmit_frame;
      netdev->get_stats = NULL;
      netdev->tx_timeout = NULL;
      netdev->set_mac_address = NULL;
      netdev->change_mtu = c2_pseudo_change_mtu;
      netdev->watchdog_timeo = 0;
      netdev->type = ARPHRD_ETHER;
      netdev->mtu = 1500;
      netdev->hard_header_len = ETH_HLEN;
      netdev->addr_len = ETH_ALEN;
      netdev->tx_queue_len = 0;
      netdev->flags |= IFF_NOARP;
      return;
}

static struct net_device *c2_pseudo_netdev_init(struct c2_dev *c2dev)
{
      char name[IFNAMSIZ];
      struct net_device *netdev;

      /* change ethxxx to iwxxx */
      strcpy(name, "iw");
      strcat(name, &c2dev->netdev->name[3]);
      netdev = alloc_netdev(sizeof(*netdev), name, setup);
      if (!netdev) {
            printk(KERN_ERR PFX "%s -  etherdev alloc failed",
                  __FUNCTION__);
            return NULL;
      }

      netdev->priv = c2dev;

      SET_NETDEV_DEV(netdev, &c2dev->pcidev->dev);

      memcpy_fromio(netdev->dev_addr, c2dev->kva + C2_REGS_RDMA_ENADDR, 6);

      /* Print out the MAC address */
      pr_debug("%s: MAC %02X:%02X:%02X:%02X:%02X:%02X\n",
            netdev->name,
            netdev->dev_addr[0], netdev->dev_addr[1], netdev->dev_addr[2],
            netdev->dev_addr[3], netdev->dev_addr[4], netdev->dev_addr[5]);

#if 0
      /* Disable network packets */
      netif_stop_queue(netdev);
#endif
      return netdev;
}

int c2_register_device(struct c2_dev *dev)
{
      int ret = -ENOMEM;
      int i;

      /* Register pseudo network device */
      dev->pseudo_netdev = c2_pseudo_netdev_init(dev);
      if (!dev->pseudo_netdev)
            goto out3;

      ret = register_netdev(dev->pseudo_netdev);
      if (ret)
            goto out2;

      pr_debug("%s:%u\n", __FUNCTION__, __LINE__);
      strlcpy(dev->ibdev.name, "amso%d", IB_DEVICE_NAME_MAX);
      dev->ibdev.owner = THIS_MODULE;
      dev->ibdev.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_REQ_NOTIFY_CQ) |
          (1ull << IB_USER_VERBS_CMD_CREATE_QP) |
          (1ull << IB_USER_VERBS_CMD_MODIFY_QP) |
          (1ull << IB_USER_VERBS_CMD_POLL_CQ) |
          (1ull << IB_USER_VERBS_CMD_DESTROY_QP) |
          (1ull << IB_USER_VERBS_CMD_POST_SEND) |
          (1ull << IB_USER_VERBS_CMD_POST_RECV);

      dev->ibdev.node_type = RDMA_NODE_RNIC;
      memset(&dev->ibdev.node_guid, 0, sizeof(dev->ibdev.node_guid));
      memcpy(&dev->ibdev.node_guid, dev->pseudo_netdev->dev_addr, 6);
      dev->ibdev.phys_port_cnt = 1;
      dev->ibdev.num_comp_vectors = 1;
      dev->ibdev.dma_device = &dev->pcidev->dev;
      dev->ibdev.query_device = c2_query_device;
      dev->ibdev.query_port = c2_query_port;
      dev->ibdev.modify_port = c2_modify_port;
      dev->ibdev.query_pkey = c2_query_pkey;
      dev->ibdev.query_gid = c2_query_gid;
      dev->ibdev.alloc_ucontext = c2_alloc_ucontext;
      dev->ibdev.dealloc_ucontext = c2_dealloc_ucontext;
      dev->ibdev.mmap = c2_mmap_uar;
      dev->ibdev.alloc_pd = c2_alloc_pd;
      dev->ibdev.dealloc_pd = c2_dealloc_pd;
      dev->ibdev.create_ah = c2_ah_create;
      dev->ibdev.destroy_ah = c2_ah_destroy;
      dev->ibdev.create_qp = c2_create_qp;
      dev->ibdev.modify_qp = c2_modify_qp;
      dev->ibdev.destroy_qp = c2_destroy_qp;
      dev->ibdev.create_cq = c2_create_cq;
      dev->ibdev.destroy_cq = c2_destroy_cq;
      dev->ibdev.poll_cq = c2_poll_cq;
      dev->ibdev.get_dma_mr = c2_get_dma_mr;
      dev->ibdev.reg_phys_mr = c2_reg_phys_mr;
      dev->ibdev.reg_user_mr = c2_reg_user_mr;
      dev->ibdev.dereg_mr = c2_dereg_mr;

      dev->ibdev.alloc_fmr = NULL;
      dev->ibdev.unmap_fmr = NULL;
      dev->ibdev.dealloc_fmr = NULL;
      dev->ibdev.map_phys_fmr = NULL;

      dev->ibdev.attach_mcast = c2_multicast_attach;
      dev->ibdev.detach_mcast = c2_multicast_detach;
      dev->ibdev.process_mad = c2_process_mad;

      dev->ibdev.req_notify_cq = c2_arm_cq;
      dev->ibdev.post_send = c2_post_send;
      dev->ibdev.post_recv = c2_post_receive;

      dev->ibdev.iwcm = kmalloc(sizeof(*dev->ibdev.iwcm), GFP_KERNEL);
      dev->ibdev.iwcm->add_ref = c2_add_ref;
      dev->ibdev.iwcm->rem_ref = c2_rem_ref;
      dev->ibdev.iwcm->get_qp = c2_get_qp;
      dev->ibdev.iwcm->connect = c2_connect;
      dev->ibdev.iwcm->accept = c2_accept;
      dev->ibdev.iwcm->reject = c2_reject;
      dev->ibdev.iwcm->create_listen = c2_service_create;
      dev->ibdev.iwcm->destroy_listen = c2_service_destroy;

      ret = ib_register_device(&dev->ibdev);
      if (ret)
            goto out1;

      for (i = 0; i < ARRAY_SIZE(c2_class_attributes); ++i) {
            ret = class_device_create_file(&dev->ibdev.class_dev,
                                     c2_class_attributes[i]);
            if (ret)
                  goto out0;
      }
      goto out3;

out0:
      ib_unregister_device(&dev->ibdev);
out1:
      unregister_netdev(dev->pseudo_netdev);
out2:
      free_netdev(dev->pseudo_netdev);
out3:
      pr_debug("%s:%u ret=%d\n", __FUNCTION__, __LINE__, ret);
      return ret;
}

void c2_unregister_device(struct c2_dev *dev)
{
      pr_debug("%s:%u\n", __FUNCTION__, __LINE__);
      unregister_netdev(dev->pseudo_netdev);
      free_netdev(dev->pseudo_netdev);
      ib_unregister_device(&dev->ibdev);
}

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