606 lines
16 KiB
C
606 lines
16 KiB
C
/*******************************************************************
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* This file is part of the Emulex RoCE Device Driver for *
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* RoCE (RDMA over Converged Ethernet) adapters. *
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* Copyright (C) 2008-2012 Emulex. All rights reserved. *
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* EMULEX and SLI are trademarks of Emulex. *
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* www.emulex.com *
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* *
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* This program is free software; you can redistribute it and/or *
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* modify it under the terms of version 2 of the GNU General *
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* Public License as published by the Free Software Foundation. *
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* This program is distributed in the hope that it will be useful. *
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* ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND *
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* WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, *
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* FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT, ARE *
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* DISCLAIMED, EXCEPT TO THE EXTENT THAT SUCH DISCLAIMERS ARE HELD *
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* TO BE LEGALLY INVALID. See the GNU General Public License for *
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* more details, a copy of which can be found in the file COPYING *
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* included with this package. *
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*
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* Contact Information:
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* linux-drivers@emulex.com
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*
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* Emulex
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* 3333 Susan Street
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* Costa Mesa, CA 92626
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*******************************************************************/
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#include <linux/module.h>
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#include <linux/idr.h>
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#include <rdma/ib_verbs.h>
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#include <rdma/ib_user_verbs.h>
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#include <rdma/ib_addr.h>
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#include <linux/netdevice.h>
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#include <net/addrconf.h>
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#include "ocrdma.h"
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#include "ocrdma_verbs.h"
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#include "ocrdma_ah.h"
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#include "be_roce.h"
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#include "ocrdma_hw.h"
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#include "ocrdma_stats.h"
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#include "ocrdma_abi.h"
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MODULE_VERSION(OCRDMA_ROCE_DRV_VERSION);
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MODULE_DESCRIPTION(OCRDMA_ROCE_DRV_DESC " " OCRDMA_ROCE_DRV_VERSION);
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MODULE_AUTHOR("Emulex Corporation");
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MODULE_LICENSE("GPL");
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static LIST_HEAD(ocrdma_dev_list);
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static DEFINE_SPINLOCK(ocrdma_devlist_lock);
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static DEFINE_IDR(ocrdma_dev_id);
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static union ib_gid ocrdma_zero_sgid;
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void ocrdma_get_guid(struct ocrdma_dev *dev, u8 *guid)
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{
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u8 mac_addr[6];
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memcpy(&mac_addr[0], &dev->nic_info.mac_addr[0], ETH_ALEN);
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guid[0] = mac_addr[0] ^ 2;
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guid[1] = mac_addr[1];
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guid[2] = mac_addr[2];
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guid[3] = 0xff;
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guid[4] = 0xfe;
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guid[5] = mac_addr[3];
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guid[6] = mac_addr[4];
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guid[7] = mac_addr[5];
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}
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static bool ocrdma_add_sgid(struct ocrdma_dev *dev, union ib_gid *new_sgid)
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{
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int i;
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unsigned long flags;
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memset(&ocrdma_zero_sgid, 0, sizeof(union ib_gid));
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spin_lock_irqsave(&dev->sgid_lock, flags);
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for (i = 0; i < OCRDMA_MAX_SGID; i++) {
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if (!memcmp(&dev->sgid_tbl[i], &ocrdma_zero_sgid,
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sizeof(union ib_gid))) {
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/* found free entry */
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memcpy(&dev->sgid_tbl[i], new_sgid,
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sizeof(union ib_gid));
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spin_unlock_irqrestore(&dev->sgid_lock, flags);
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return true;
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} else if (!memcmp(&dev->sgid_tbl[i], new_sgid,
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sizeof(union ib_gid))) {
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/* entry already present, no addition is required. */
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spin_unlock_irqrestore(&dev->sgid_lock, flags);
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return false;
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}
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}
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spin_unlock_irqrestore(&dev->sgid_lock, flags);
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return false;
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}
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static bool ocrdma_del_sgid(struct ocrdma_dev *dev, union ib_gid *sgid)
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{
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int found = false;
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int i;
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unsigned long flags;
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spin_lock_irqsave(&dev->sgid_lock, flags);
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/* first is default sgid, which cannot be deleted. */
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for (i = 1; i < OCRDMA_MAX_SGID; i++) {
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if (!memcmp(&dev->sgid_tbl[i], sgid, sizeof(union ib_gid))) {
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/* found matching entry */
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memset(&dev->sgid_tbl[i], 0, sizeof(union ib_gid));
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found = true;
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break;
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}
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}
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spin_unlock_irqrestore(&dev->sgid_lock, flags);
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return found;
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}
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static int ocrdma_addr_event(unsigned long event, struct net_device *netdev,
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union ib_gid *gid)
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{
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struct ib_event gid_event;
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struct ocrdma_dev *dev;
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bool found = false;
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bool updated = false;
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bool is_vlan = false;
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is_vlan = netdev->priv_flags & IFF_802_1Q_VLAN;
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if (is_vlan)
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netdev = rdma_vlan_dev_real_dev(netdev);
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rcu_read_lock();
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list_for_each_entry_rcu(dev, &ocrdma_dev_list, entry) {
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if (dev->nic_info.netdev == netdev) {
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found = true;
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break;
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}
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}
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rcu_read_unlock();
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if (!found)
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return NOTIFY_DONE;
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mutex_lock(&dev->dev_lock);
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switch (event) {
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case NETDEV_UP:
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updated = ocrdma_add_sgid(dev, gid);
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break;
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case NETDEV_DOWN:
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updated = ocrdma_del_sgid(dev, gid);
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break;
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default:
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break;
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}
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if (updated) {
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/* GID table updated, notify the consumers about it */
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gid_event.device = &dev->ibdev;
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gid_event.element.port_num = 1;
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gid_event.event = IB_EVENT_GID_CHANGE;
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ib_dispatch_event(&gid_event);
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}
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mutex_unlock(&dev->dev_lock);
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return NOTIFY_OK;
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}
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static int ocrdma_inetaddr_event(struct notifier_block *notifier,
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unsigned long event, void *ptr)
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{
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struct in_ifaddr *ifa = ptr;
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union ib_gid gid;
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struct net_device *netdev = ifa->ifa_dev->dev;
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ipv6_addr_set_v4mapped(ifa->ifa_address, (struct in6_addr *)&gid);
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return ocrdma_addr_event(event, netdev, &gid);
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}
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static struct notifier_block ocrdma_inetaddr_notifier = {
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.notifier_call = ocrdma_inetaddr_event
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};
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#if IS_ENABLED(CONFIG_IPV6)
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static int ocrdma_inet6addr_event(struct notifier_block *notifier,
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unsigned long event, void *ptr)
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{
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struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)ptr;
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union ib_gid *gid = (union ib_gid *)&ifa->addr;
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struct net_device *netdev = ifa->idev->dev;
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return ocrdma_addr_event(event, netdev, gid);
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}
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static struct notifier_block ocrdma_inet6addr_notifier = {
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.notifier_call = ocrdma_inet6addr_event
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};
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#endif /* IPV6 and VLAN */
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static enum rdma_link_layer ocrdma_link_layer(struct ib_device *device,
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u8 port_num)
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{
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return IB_LINK_LAYER_ETHERNET;
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}
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static int ocrdma_register_device(struct ocrdma_dev *dev)
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{
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strlcpy(dev->ibdev.name, "ocrdma%d", IB_DEVICE_NAME_MAX);
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ocrdma_get_guid(dev, (u8 *)&dev->ibdev.node_guid);
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memcpy(dev->ibdev.node_desc, OCRDMA_NODE_DESC,
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sizeof(OCRDMA_NODE_DESC));
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dev->ibdev.owner = THIS_MODULE;
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dev->ibdev.uverbs_abi_ver = OCRDMA_ABI_VERSION;
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dev->ibdev.uverbs_cmd_mask =
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OCRDMA_UVERBS(GET_CONTEXT) |
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OCRDMA_UVERBS(QUERY_DEVICE) |
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OCRDMA_UVERBS(QUERY_PORT) |
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OCRDMA_UVERBS(ALLOC_PD) |
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OCRDMA_UVERBS(DEALLOC_PD) |
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OCRDMA_UVERBS(REG_MR) |
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OCRDMA_UVERBS(DEREG_MR) |
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OCRDMA_UVERBS(CREATE_COMP_CHANNEL) |
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OCRDMA_UVERBS(CREATE_CQ) |
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OCRDMA_UVERBS(RESIZE_CQ) |
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OCRDMA_UVERBS(DESTROY_CQ) |
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OCRDMA_UVERBS(REQ_NOTIFY_CQ) |
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OCRDMA_UVERBS(CREATE_QP) |
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OCRDMA_UVERBS(MODIFY_QP) |
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OCRDMA_UVERBS(QUERY_QP) |
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OCRDMA_UVERBS(DESTROY_QP) |
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OCRDMA_UVERBS(POLL_CQ) |
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OCRDMA_UVERBS(POST_SEND) |
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OCRDMA_UVERBS(POST_RECV);
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dev->ibdev.uverbs_cmd_mask |=
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OCRDMA_UVERBS(CREATE_AH) |
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OCRDMA_UVERBS(MODIFY_AH) |
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OCRDMA_UVERBS(QUERY_AH) |
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OCRDMA_UVERBS(DESTROY_AH);
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dev->ibdev.node_type = RDMA_NODE_IB_CA;
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dev->ibdev.phys_port_cnt = 1;
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dev->ibdev.num_comp_vectors = 1;
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/* mandatory verbs. */
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dev->ibdev.query_device = ocrdma_query_device;
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dev->ibdev.query_port = ocrdma_query_port;
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dev->ibdev.modify_port = ocrdma_modify_port;
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dev->ibdev.query_gid = ocrdma_query_gid;
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dev->ibdev.get_link_layer = ocrdma_link_layer;
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dev->ibdev.alloc_pd = ocrdma_alloc_pd;
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dev->ibdev.dealloc_pd = ocrdma_dealloc_pd;
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dev->ibdev.create_cq = ocrdma_create_cq;
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dev->ibdev.destroy_cq = ocrdma_destroy_cq;
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dev->ibdev.resize_cq = ocrdma_resize_cq;
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dev->ibdev.create_qp = ocrdma_create_qp;
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dev->ibdev.modify_qp = ocrdma_modify_qp;
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dev->ibdev.query_qp = ocrdma_query_qp;
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dev->ibdev.destroy_qp = ocrdma_destroy_qp;
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dev->ibdev.query_pkey = ocrdma_query_pkey;
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dev->ibdev.create_ah = ocrdma_create_ah;
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dev->ibdev.destroy_ah = ocrdma_destroy_ah;
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dev->ibdev.query_ah = ocrdma_query_ah;
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dev->ibdev.modify_ah = ocrdma_modify_ah;
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dev->ibdev.poll_cq = ocrdma_poll_cq;
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dev->ibdev.post_send = ocrdma_post_send;
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dev->ibdev.post_recv = ocrdma_post_recv;
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dev->ibdev.req_notify_cq = ocrdma_arm_cq;
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dev->ibdev.get_dma_mr = ocrdma_get_dma_mr;
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dev->ibdev.reg_phys_mr = ocrdma_reg_kernel_mr;
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dev->ibdev.dereg_mr = ocrdma_dereg_mr;
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dev->ibdev.reg_user_mr = ocrdma_reg_user_mr;
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dev->ibdev.alloc_fast_reg_mr = ocrdma_alloc_frmr;
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dev->ibdev.alloc_fast_reg_page_list = ocrdma_alloc_frmr_page_list;
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dev->ibdev.free_fast_reg_page_list = ocrdma_free_frmr_page_list;
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/* mandatory to support user space verbs consumer. */
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dev->ibdev.alloc_ucontext = ocrdma_alloc_ucontext;
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dev->ibdev.dealloc_ucontext = ocrdma_dealloc_ucontext;
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dev->ibdev.mmap = ocrdma_mmap;
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dev->ibdev.dma_device = &dev->nic_info.pdev->dev;
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dev->ibdev.process_mad = ocrdma_process_mad;
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if (ocrdma_get_asic_type(dev) == OCRDMA_ASIC_GEN_SKH_R) {
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dev->ibdev.uverbs_cmd_mask |=
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OCRDMA_UVERBS(CREATE_SRQ) |
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OCRDMA_UVERBS(MODIFY_SRQ) |
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OCRDMA_UVERBS(QUERY_SRQ) |
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OCRDMA_UVERBS(DESTROY_SRQ) |
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OCRDMA_UVERBS(POST_SRQ_RECV);
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dev->ibdev.create_srq = ocrdma_create_srq;
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dev->ibdev.modify_srq = ocrdma_modify_srq;
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dev->ibdev.query_srq = ocrdma_query_srq;
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dev->ibdev.destroy_srq = ocrdma_destroy_srq;
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dev->ibdev.post_srq_recv = ocrdma_post_srq_recv;
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}
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return ib_register_device(&dev->ibdev, NULL);
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}
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static int ocrdma_alloc_resources(struct ocrdma_dev *dev)
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{
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mutex_init(&dev->dev_lock);
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dev->sgid_tbl = kzalloc(sizeof(union ib_gid) *
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OCRDMA_MAX_SGID, GFP_KERNEL);
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if (!dev->sgid_tbl)
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goto alloc_err;
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spin_lock_init(&dev->sgid_lock);
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dev->cq_tbl = kzalloc(sizeof(struct ocrdma_cq *) *
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OCRDMA_MAX_CQ, GFP_KERNEL);
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if (!dev->cq_tbl)
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goto alloc_err;
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if (dev->attr.max_qp) {
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dev->qp_tbl = kzalloc(sizeof(struct ocrdma_qp *) *
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OCRDMA_MAX_QP, GFP_KERNEL);
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if (!dev->qp_tbl)
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goto alloc_err;
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}
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spin_lock_init(&dev->av_tbl.lock);
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spin_lock_init(&dev->flush_q_lock);
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return 0;
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alloc_err:
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pr_err("%s(%d) error.\n", __func__, dev->id);
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return -ENOMEM;
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}
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static void ocrdma_free_resources(struct ocrdma_dev *dev)
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{
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kfree(dev->qp_tbl);
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kfree(dev->cq_tbl);
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kfree(dev->sgid_tbl);
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}
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/* OCRDMA sysfs interface */
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static ssize_t show_rev(struct device *device, struct device_attribute *attr,
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char *buf)
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{
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struct ocrdma_dev *dev = dev_get_drvdata(device);
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return scnprintf(buf, PAGE_SIZE, "0x%x\n", dev->nic_info.pdev->vendor);
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}
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static ssize_t show_fw_ver(struct device *device, struct device_attribute *attr,
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char *buf)
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{
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struct ocrdma_dev *dev = dev_get_drvdata(device);
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return scnprintf(buf, PAGE_SIZE, "%s\n", &dev->attr.fw_ver[0]);
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}
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static ssize_t show_hca_type(struct device *device,
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struct device_attribute *attr, char *buf)
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{
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struct ocrdma_dev *dev = dev_get_drvdata(device);
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return scnprintf(buf, PAGE_SIZE, "%s\n", &dev->model_number[0]);
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}
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static DEVICE_ATTR(hw_rev, S_IRUGO, show_rev, NULL);
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static DEVICE_ATTR(fw_ver, S_IRUGO, show_fw_ver, NULL);
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static DEVICE_ATTR(hca_type, S_IRUGO, show_hca_type, NULL);
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static struct device_attribute *ocrdma_attributes[] = {
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&dev_attr_hw_rev,
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&dev_attr_fw_ver,
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&dev_attr_hca_type
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};
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static void ocrdma_remove_sysfiles(struct ocrdma_dev *dev)
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{
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int i;
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for (i = 0; i < ARRAY_SIZE(ocrdma_attributes); i++)
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device_remove_file(&dev->ibdev.dev, ocrdma_attributes[i]);
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}
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static struct ocrdma_dev *ocrdma_add(struct be_dev_info *dev_info)
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{
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int status = 0, i;
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struct ocrdma_dev *dev;
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dev = (struct ocrdma_dev *)ib_alloc_device(sizeof(struct ocrdma_dev));
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if (!dev) {
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pr_err("Unable to allocate ib device\n");
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return NULL;
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}
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dev->mbx_cmd = kzalloc(sizeof(struct ocrdma_mqe_emb_cmd), GFP_KERNEL);
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if (!dev->mbx_cmd)
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goto idr_err;
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memcpy(&dev->nic_info, dev_info, sizeof(*dev_info));
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dev->id = idr_alloc(&ocrdma_dev_id, NULL, 0, 0, GFP_KERNEL);
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if (dev->id < 0)
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goto idr_err;
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status = ocrdma_init_hw(dev);
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if (status)
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goto init_err;
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status = ocrdma_alloc_resources(dev);
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if (status)
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goto alloc_err;
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ocrdma_init_service_level(dev);
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status = ocrdma_register_device(dev);
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if (status)
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goto alloc_err;
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for (i = 0; i < ARRAY_SIZE(ocrdma_attributes); i++)
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if (device_create_file(&dev->ibdev.dev, ocrdma_attributes[i]))
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goto sysfs_err;
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spin_lock(&ocrdma_devlist_lock);
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list_add_tail_rcu(&dev->entry, &ocrdma_dev_list);
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spin_unlock(&ocrdma_devlist_lock);
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/* Init stats */
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ocrdma_add_port_stats(dev);
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pr_info("%s %s: %s \"%s\" port %d\n",
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dev_name(&dev->nic_info.pdev->dev), hca_name(dev),
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port_speed_string(dev), dev->model_number,
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dev->hba_port_num);
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pr_info("%s ocrdma%d driver loaded successfully\n",
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dev_name(&dev->nic_info.pdev->dev), dev->id);
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return dev;
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sysfs_err:
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ocrdma_remove_sysfiles(dev);
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alloc_err:
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ocrdma_free_resources(dev);
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ocrdma_cleanup_hw(dev);
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init_err:
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idr_remove(&ocrdma_dev_id, dev->id);
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idr_err:
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kfree(dev->mbx_cmd);
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ib_dealloc_device(&dev->ibdev);
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pr_err("%s() leaving. ret=%d\n", __func__, status);
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return NULL;
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}
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static void ocrdma_remove_free(struct rcu_head *rcu)
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{
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struct ocrdma_dev *dev = container_of(rcu, struct ocrdma_dev, rcu);
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idr_remove(&ocrdma_dev_id, dev->id);
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kfree(dev->mbx_cmd);
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ib_dealloc_device(&dev->ibdev);
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}
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static void ocrdma_remove(struct ocrdma_dev *dev)
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{
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/* first unregister with stack to stop all the active traffic
|
|
* of the registered clients.
|
|
*/
|
|
ocrdma_rem_port_stats(dev);
|
|
ocrdma_remove_sysfiles(dev);
|
|
|
|
ib_unregister_device(&dev->ibdev);
|
|
|
|
spin_lock(&ocrdma_devlist_lock);
|
|
list_del_rcu(&dev->entry);
|
|
spin_unlock(&ocrdma_devlist_lock);
|
|
|
|
ocrdma_free_resources(dev);
|
|
ocrdma_cleanup_hw(dev);
|
|
|
|
call_rcu(&dev->rcu, ocrdma_remove_free);
|
|
}
|
|
|
|
static int ocrdma_open(struct ocrdma_dev *dev)
|
|
{
|
|
struct ib_event port_event;
|
|
|
|
port_event.event = IB_EVENT_PORT_ACTIVE;
|
|
port_event.element.port_num = 1;
|
|
port_event.device = &dev->ibdev;
|
|
ib_dispatch_event(&port_event);
|
|
return 0;
|
|
}
|
|
|
|
static int ocrdma_close(struct ocrdma_dev *dev)
|
|
{
|
|
int i;
|
|
struct ocrdma_qp *qp, **cur_qp;
|
|
struct ib_event err_event;
|
|
struct ib_qp_attr attrs;
|
|
int attr_mask = IB_QP_STATE;
|
|
|
|
attrs.qp_state = IB_QPS_ERR;
|
|
mutex_lock(&dev->dev_lock);
|
|
if (dev->qp_tbl) {
|
|
cur_qp = dev->qp_tbl;
|
|
for (i = 0; i < OCRDMA_MAX_QP; i++) {
|
|
qp = cur_qp[i];
|
|
if (qp && qp->ibqp.qp_type != IB_QPT_GSI) {
|
|
/* change the QP state to ERROR */
|
|
_ocrdma_modify_qp(&qp->ibqp, &attrs, attr_mask);
|
|
|
|
err_event.event = IB_EVENT_QP_FATAL;
|
|
err_event.element.qp = &qp->ibqp;
|
|
err_event.device = &dev->ibdev;
|
|
ib_dispatch_event(&err_event);
|
|
}
|
|
}
|
|
}
|
|
mutex_unlock(&dev->dev_lock);
|
|
|
|
err_event.event = IB_EVENT_PORT_ERR;
|
|
err_event.element.port_num = 1;
|
|
err_event.device = &dev->ibdev;
|
|
ib_dispatch_event(&err_event);
|
|
return 0;
|
|
}
|
|
|
|
static void ocrdma_shutdown(struct ocrdma_dev *dev)
|
|
{
|
|
ocrdma_close(dev);
|
|
ocrdma_remove(dev);
|
|
}
|
|
|
|
/* event handling via NIC driver ensures that all the NIC specific
|
|
* initialization done before RoCE driver notifies
|
|
* event to stack.
|
|
*/
|
|
static void ocrdma_event_handler(struct ocrdma_dev *dev, u32 event)
|
|
{
|
|
switch (event) {
|
|
case BE_DEV_UP:
|
|
ocrdma_open(dev);
|
|
break;
|
|
case BE_DEV_DOWN:
|
|
ocrdma_close(dev);
|
|
break;
|
|
case BE_DEV_SHUTDOWN:
|
|
ocrdma_shutdown(dev);
|
|
break;
|
|
}
|
|
}
|
|
|
|
static struct ocrdma_driver ocrdma_drv = {
|
|
.name = "ocrdma_driver",
|
|
.add = ocrdma_add,
|
|
.remove = ocrdma_remove,
|
|
.state_change_handler = ocrdma_event_handler,
|
|
.be_abi_version = OCRDMA_BE_ROCE_ABI_VERSION,
|
|
};
|
|
|
|
static void ocrdma_unregister_inet6addr_notifier(void)
|
|
{
|
|
#if IS_ENABLED(CONFIG_IPV6)
|
|
unregister_inet6addr_notifier(&ocrdma_inet6addr_notifier);
|
|
#endif
|
|
}
|
|
|
|
static void ocrdma_unregister_inetaddr_notifier(void)
|
|
{
|
|
unregister_inetaddr_notifier(&ocrdma_inetaddr_notifier);
|
|
}
|
|
|
|
static int __init ocrdma_init_module(void)
|
|
{
|
|
int status;
|
|
|
|
ocrdma_init_debugfs();
|
|
|
|
status = register_inetaddr_notifier(&ocrdma_inetaddr_notifier);
|
|
if (status)
|
|
return status;
|
|
|
|
#if IS_ENABLED(CONFIG_IPV6)
|
|
status = register_inet6addr_notifier(&ocrdma_inet6addr_notifier);
|
|
if (status)
|
|
goto err_notifier6;
|
|
#endif
|
|
|
|
status = be_roce_register_driver(&ocrdma_drv);
|
|
if (status)
|
|
goto err_be_reg;
|
|
|
|
return 0;
|
|
|
|
err_be_reg:
|
|
ocrdma_unregister_inet6addr_notifier();
|
|
err_notifier6:
|
|
ocrdma_unregister_inetaddr_notifier();
|
|
return status;
|
|
}
|
|
|
|
static void __exit ocrdma_exit_module(void)
|
|
{
|
|
be_roce_unregister_driver(&ocrdma_drv);
|
|
ocrdma_unregister_inet6addr_notifier();
|
|
ocrdma_unregister_inetaddr_notifier();
|
|
ocrdma_rem_debugfs();
|
|
}
|
|
|
|
module_init(ocrdma_init_module);
|
|
module_exit(ocrdma_exit_module);
|