1 files changed, 558 insertions, 0 deletions

diff --git a/drivers/infiniband/hw/ocrdma/ocrdma_main.c b/drivers/infiniband/hw/ocrdma/ocrdma_main.c
new file mode 100644
index 00000000000..8aa34167aac
--- /dev/null
+++ b/drivers/infiniband/hw/ocrdma/ocrdma_main.c
@@ -0,0 +1,558 @@
+/*******************************************************************
+ * This file is part of the Emulex RoCE Device Driver for          *
+ * RoCE (RDMA over Converged Ethernet) adapters.                   *
+ * Copyright (C) 2008-2012 Emulex. All rights reserved.            *
+ * EMULEX and SLI are trademarks of Emulex.                        *
+ * www.emulex.com                                                  *
+ *                                                                 *
+ * This program is free software; you can redistribute it and/or   *
+ * modify it under the terms of version 2 of the GNU General       *
+ * Public License as published by the Free Software Foundation.    *
+ * This program is distributed in the hope that it will be useful. *
+ * ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND          *
+ * WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY,  *
+ * FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT, ARE      *
+ * DISCLAIMED, EXCEPT TO THE EXTENT THAT SUCH DISCLAIMERS ARE HELD *
+ * TO BE LEGALLY INVALID.  See the GNU General Public License for  *
+ * more details, a copy of which can be found in the file COPYING  *
+ * included with this package.                                     *
+ *
+ * Contact Information:
+ * linux-drivers@emulex.com
+ *
+ * Emulex
+ * 3333 Susan Street
+ * Costa Mesa, CA 92626
+ *******************************************************************/
+
+#include <linux/module.h>
+#include <linux/version.h>
+#include <linux/idr.h>
+#include <rdma/ib_verbs.h>
+#include <rdma/ib_user_verbs.h>
+#include <rdma/ib_addr.h>
+
+#include <linux/netdevice.h>
+#include <net/addrconf.h>
+
+#include "ocrdma.h"
+#include "ocrdma_verbs.h"
+#include "ocrdma_ah.h"
+#include "be_roce.h"
+#include "ocrdma_hw.h"
+
+MODULE_VERSION(OCRDMA_ROCE_DEV_VERSION);
+MODULE_DESCRIPTION("Emulex RoCE HCA Driver");
+MODULE_AUTHOR("Emulex Corporation");
+MODULE_LICENSE("GPL");
+
+static LIST_HEAD(ocrdma_dev_list);
+static DEFINE_MUTEX(ocrdma_devlist_lock);
+static DEFINE_IDR(ocrdma_dev_id);
+
+static union ib_gid ocrdma_zero_sgid;
+static int ocrdma_inet6addr_event(struct notifier_block *,
+                                  unsigned long, void *);
+
+static struct notifier_block ocrdma_inet6addr_notifier = {
+        .notifier_call = ocrdma_inet6addr_event
+};
+
+int ocrdma_get_instance(void)
+{
+        int instance = 0;
+
+        /* Assign an unused number */
+        if (!idr_pre_get(&ocrdma_dev_id, GFP_KERNEL))
+                return -1;
+        if (idr_get_new(&ocrdma_dev_id, NULL, &instance))
+                return -1;
+        return instance;
+}
+
+void ocrdma_get_guid(struct ocrdma_dev *dev, u8 *guid)
+{
+        u8 mac_addr[6];
+
+        memcpy(&mac_addr[0], &dev->nic_info.mac_addr[0], ETH_ALEN);
+        guid[0] = mac_addr[0] ^ 2;
+        guid[1] = mac_addr[1];
+        guid[2] = mac_addr[2];
+        guid[3] = 0xff;
+        guid[4] = 0xfe;
+        guid[5] = mac_addr[3];
+        guid[6] = mac_addr[4];
+        guid[7] = mac_addr[5];
+}
+
+static void ocrdma_build_sgid_mac(union ib_gid *sgid, unsigned char *mac_addr,
+                                  bool is_vlan, u16 vlan_id)
+{
+        sgid->global.subnet_prefix = cpu_to_be64(0xfe80000000000000LL);
+        sgid->raw[8] = mac_addr[0] ^ 2;
+        sgid->raw[9] = mac_addr[1];
+        sgid->raw[10] = mac_addr[2];
+        if (is_vlan) {
+                sgid->raw[11] = vlan_id >> 8;
+                sgid->raw[12] = vlan_id & 0xff;
+        } else {
+                sgid->raw[11] = 0xff;
+                sgid->raw[12] = 0xfe;
+        }
+        sgid->raw[13] = mac_addr[3];
+        sgid->raw[14] = mac_addr[4];
+        sgid->raw[15] = mac_addr[5];
+}
+
+static void ocrdma_add_sgid(struct ocrdma_dev *dev, unsigned char *mac_addr,
+                            bool is_vlan, u16 vlan_id)
+{
+        int i;
+        bool found = false;
+        union ib_gid new_sgid;
+        int free_idx = OCRDMA_MAX_SGID;
+        unsigned long flags;
+
+        memset(&ocrdma_zero_sgid, 0, sizeof(union ib_gid));
+
+        ocrdma_build_sgid_mac(&new_sgid, mac_addr, is_vlan, vlan_id);
+
+        spin_lock_irqsave(&dev->sgid_lock, flags);
+        for (i = 0; i < OCRDMA_MAX_SGID; i++) {
+                if (!memcmp(&dev->sgid_tbl[i], &ocrdma_zero_sgid,
+                            sizeof(union ib_gid))) {
+                        /* found free entry */
+                        if (!found) {
+                                free_idx = i;
+                                found = true;
+                                break;
+                        }
+                } else if (!memcmp(&dev->sgid_tbl[i], &new_sgid,
+                                   sizeof(union ib_gid))) {
+                        /* entry already present, no addition is required. */
+                        spin_unlock_irqrestore(&dev->sgid_lock, flags);
+                        return;
+                }
+        }
+        /* if entry doesn't exist and if table has some space, add entry */
+        if (found)
+                memcpy(&dev->sgid_tbl[free_idx], &new_sgid,
+                       sizeof(union ib_gid));
+        spin_unlock_irqrestore(&dev->sgid_lock, flags);
+}
+
+static bool ocrdma_del_sgid(struct ocrdma_dev *dev, unsigned char *mac_addr,
+                            bool is_vlan, u16 vlan_id)
+{
+        int found = false;
+        int i;
+        union ib_gid sgid;
+        unsigned long flags;
+
+        ocrdma_build_sgid_mac(&sgid, mac_addr, is_vlan, vlan_id);
+
+        spin_lock_irqsave(&dev->sgid_lock, flags);
+        /* first is default sgid, which cannot be deleted. */
+        for (i = 1; i < OCRDMA_MAX_SGID; i++) {
+                if (!memcmp(&dev->sgid_tbl[i], &sgid, sizeof(union ib_gid))) {
+                        /* found matching entry */
+                        memset(&dev->sgid_tbl[i], 0, sizeof(union ib_gid));
+                        found = true;
+                        break;
+                }
+        }
+        spin_unlock_irqrestore(&dev->sgid_lock, flags);
+        return found;
+}
+
+static void ocrdma_add_default_sgid(struct ocrdma_dev *dev)
+{
+        /* GID Index 0 - Invariant manufacturer-assigned EUI-64 */
+        union ib_gid *sgid = &dev->sgid_tbl[0];
+
+        sgid->global.subnet_prefix = cpu_to_be64(0xfe80000000000000LL);
+        ocrdma_get_guid(dev, &sgid->raw[8]);
+}
+
+static int ocrdma_build_sgid_tbl(struct ocrdma_dev *dev)
+{
+        struct net_device *netdev, *tmp;
+        u16 vlan_id;
+        bool is_vlan;
+
+        netdev = dev->nic_info.netdev;
+
+        ocrdma_add_default_sgid(dev);
+
+        rcu_read_lock();
+        for_each_netdev_rcu(&init_net, tmp) {
+                if (netdev == tmp || vlan_dev_real_dev(tmp) == netdev) {
+                        if (!netif_running(tmp) || !netif_oper_up(tmp))
+                                continue;
+                        if (netdev != tmp) {
+                                vlan_id = vlan_dev_vlan_id(tmp);
+                                is_vlan = true;
+                        } else {
+                                is_vlan = false;
+                                vlan_id = 0;
+                                tmp = netdev;
+                        }
+                        ocrdma_add_sgid(dev, tmp->dev_addr, is_vlan, vlan_id);
+                }
+        }
+        rcu_read_unlock();
+        return 0;
+}
+
+static int ocrdma_inet6addr_event(struct notifier_block *notifier,
+                                  unsigned long event, void *ptr)
+{
+        struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)ptr;
+        struct net_device *event_netdev = ifa->idev->dev;
+        struct net_device *netdev = NULL;
+        struct ib_event gid_event;
+        struct ocrdma_dev *dev;
+        bool found = false;
+        bool is_vlan = false;
+        u16 vid = 0;
+
+        netdev = vlan_dev_real_dev(event_netdev);
+        if (netdev != event_netdev) {
+                is_vlan = true;
+                vid = vlan_dev_vlan_id(event_netdev);
+        }
+        mutex_lock(&ocrdma_devlist_lock);
+        list_for_each_entry(dev, &ocrdma_dev_list, entry) {
+                if (dev->nic_info.netdev == netdev) {
+                        found = true;
+                        break;
+                }
+        }
+        mutex_unlock(&ocrdma_devlist_lock);
+
+        if (!found)
+                return NOTIFY_DONE;
+        if (!rdma_link_local_addr((struct in6_addr *)&ifa->addr))
+                return NOTIFY_DONE;
+
+        mutex_lock(&dev->dev_lock);
+        switch (event) {
+        case NETDEV_UP:
+                ocrdma_add_sgid(dev, netdev->dev_addr, is_vlan, vid);
+                break;
+        case NETDEV_DOWN:
+                found = ocrdma_del_sgid(dev, netdev->dev_addr, is_vlan, vid);
+                if (found) {
+                        /* found the matching entry, notify
+                         * the consumers about it
+                         */
+                        gid_event.device = &dev->ibdev;
+                        gid_event.element.port_num = 1;
+                        gid_event.event = IB_EVENT_GID_CHANGE;
+                        ib_dispatch_event(&gid_event);
+                }
+                break;
+        default:
+                break;
+        }
+        mutex_unlock(&dev->dev_lock);
+        return NOTIFY_OK;
+}
+
+static enum rdma_link_layer ocrdma_link_layer(struct ib_device *device,
+                                              u8 port_num)
+{
+        return IB_LINK_LAYER_ETHERNET;
+}
+
+int ocrdma_register_device(struct ocrdma_dev *dev)
+{
+        strlcpy(dev->ibdev.name, "ocrdma%d", IB_DEVICE_NAME_MAX);
+        ocrdma_get_guid(dev, (u8 *)&dev->ibdev.node_guid);
+        memcpy(dev->ibdev.node_desc, OCRDMA_NODE_DESC,
+               sizeof(OCRDMA_NODE_DESC));
+        dev->ibdev.owner = THIS_MODULE;
+        dev->ibdev.uverbs_cmd_mask =
+            OCRDMA_UVERBS(GET_CONTEXT) |
+            OCRDMA_UVERBS(QUERY_DEVICE) |
+            OCRDMA_UVERBS(QUERY_PORT) |
+            OCRDMA_UVERBS(ALLOC_PD) |
+            OCRDMA_UVERBS(DEALLOC_PD) |
+            OCRDMA_UVERBS(REG_MR) |
+            OCRDMA_UVERBS(DEREG_MR) |
+            OCRDMA_UVERBS(CREATE_COMP_CHANNEL) |
+            OCRDMA_UVERBS(CREATE_CQ) |
+            OCRDMA_UVERBS(RESIZE_CQ) |
+            OCRDMA_UVERBS(DESTROY_CQ) |
+            OCRDMA_UVERBS(REQ_NOTIFY_CQ) |
+            OCRDMA_UVERBS(CREATE_QP) |
+            OCRDMA_UVERBS(MODIFY_QP) |
+            OCRDMA_UVERBS(QUERY_QP) |
+            OCRDMA_UVERBS(DESTROY_QP) |
+            OCRDMA_UVERBS(POLL_CQ) |
+            OCRDMA_UVERBS(POST_SEND) |
+            OCRDMA_UVERBS(POST_RECV);
+
+        dev->ibdev.uverbs_cmd_mask |=
+            OCRDMA_UVERBS(CREATE_AH) |
+             OCRDMA_UVERBS(MODIFY_AH) |
+             OCRDMA_UVERBS(QUERY_AH) |
+             OCRDMA_UVERBS(DESTROY_AH);
+
+        dev->ibdev.node_type = RDMA_NODE_IB_CA;
+        dev->ibdev.phys_port_cnt = 1;
+        dev->ibdev.num_comp_vectors = 1;
+
+        /* mandatory verbs. */
+        dev->ibdev.query_device = ocrdma_query_device;
+        dev->ibdev.query_port = ocrdma_query_port;
+        dev->ibdev.modify_port = ocrdma_modify_port;
+        dev->ibdev.query_gid = ocrdma_query_gid;
+        dev->ibdev.get_link_layer = ocrdma_link_layer;
+        dev->ibdev.alloc_pd = ocrdma_alloc_pd;
+        dev->ibdev.dealloc_pd = ocrdma_dealloc_pd;
+
+        dev->ibdev.create_cq = ocrdma_create_cq;
+        dev->ibdev.destroy_cq = ocrdma_destroy_cq;
+        dev->ibdev.resize_cq = ocrdma_resize_cq;
+
+        dev->ibdev.create_qp = ocrdma_create_qp;
+        dev->ibdev.modify_qp = ocrdma_modify_qp;
+        dev->ibdev.query_qp = ocrdma_query_qp;
+        dev->ibdev.destroy_qp = ocrdma_destroy_qp;
+
+        dev->ibdev.query_pkey = ocrdma_query_pkey;
+        dev->ibdev.create_ah = ocrdma_create_ah;
+        dev->ibdev.destroy_ah = ocrdma_destroy_ah;
+        dev->ibdev.query_ah = ocrdma_query_ah;
+        dev->ibdev.modify_ah = ocrdma_modify_ah;
+
+        dev->ibdev.poll_cq = ocrdma_poll_cq;
+        dev->ibdev.post_send = ocrdma_post_send;
+        dev->ibdev.post_recv = ocrdma_post_recv;
+        dev->ibdev.req_notify_cq = ocrdma_arm_cq;
+
+        dev->ibdev.get_dma_mr = ocrdma_get_dma_mr;
+        dev->ibdev.dereg_mr = ocrdma_dereg_mr;
+        dev->ibdev.reg_user_mr = ocrdma_reg_user_mr;
+
+        /* mandatory to support user space verbs consumer. */
+        dev->ibdev.alloc_ucontext = ocrdma_alloc_ucontext;
+        dev->ibdev.dealloc_ucontext = ocrdma_dealloc_ucontext;
+        dev->ibdev.mmap = ocrdma_mmap;
+        dev->ibdev.dma_device = &dev->nic_info.pdev->dev;
+
+        dev->ibdev.process_mad = ocrdma_process_mad;
+
+        if (dev->nic_info.dev_family == OCRDMA_GEN2_FAMILY) {
+                dev->ibdev.uverbs_cmd_mask |=
+                     OCRDMA_UVERBS(CREATE_SRQ) |
+                     OCRDMA_UVERBS(MODIFY_SRQ) |
+                     OCRDMA_UVERBS(QUERY_SRQ) |
+                     OCRDMA_UVERBS(DESTROY_SRQ) |
+                     OCRDMA_UVERBS(POST_SRQ_RECV);
+
+                dev->ibdev.create_srq = ocrdma_create_srq;
+                dev->ibdev.modify_srq = ocrdma_modify_srq;
+                dev->ibdev.query_srq = ocrdma_query_srq;
+                dev->ibdev.destroy_srq = ocrdma_destroy_srq;
+                dev->ibdev.post_srq_recv = ocrdma_post_srq_recv;
+        }
+        return ib_register_device(&dev->ibdev, NULL);
+}
+
+static int ocrdma_alloc_resources(struct ocrdma_dev *dev)
+{
+        mutex_init(&dev->dev_lock);
+        dev->sgid_tbl = kzalloc(sizeof(union ib_gid) *
+                                OCRDMA_MAX_SGID, GFP_KERNEL);
+        if (!dev->sgid_tbl)
+                goto alloc_err;
+        spin_lock_init(&dev->sgid_lock);
+
+        dev->cq_tbl = kzalloc(sizeof(struct ocrdma_cq *) *
+                              OCRDMA_MAX_CQ, GFP_KERNEL);
+        if (!dev->cq_tbl)
+                goto alloc_err;
+
+        if (dev->attr.max_qp) {
+                dev->qp_tbl = kzalloc(sizeof(struct ocrdma_qp *) *
+                                      OCRDMA_MAX_QP, GFP_KERNEL);
+                if (!dev->qp_tbl)
+                        goto alloc_err;
+        }
+        spin_lock_init(&dev->av_tbl.lock);
+        spin_lock_init(&dev->flush_q_lock);
+        return 0;
+alloc_err:
+        ocrdma_err("%s(%d) error.\n", __func__, dev->id);
+        return -ENOMEM;
+}
+
+static void ocrdma_free_resources(struct ocrdma_dev *dev)
+{
+        kfree(dev->qp_tbl);
+        kfree(dev->cq_tbl);
+        kfree(dev->sgid_tbl);
+}
+
+static struct ocrdma_dev *ocrdma_add(struct be_dev_info *dev_info)
+{
+        int status = 0;
+        struct ocrdma_dev *dev;
+
+        dev = (struct ocrdma_dev *)ib_alloc_device(sizeof(struct ocrdma_dev));
+        if (!dev) {
+                ocrdma_err("Unable to allocate ib device\n");
+                return NULL;
+        }
+        dev->mbx_cmd = kzalloc(sizeof(struct ocrdma_mqe_emb_cmd), GFP_KERNEL);
+        if (!dev->mbx_cmd)
+                goto idr_err;
+
+        memcpy(&dev->nic_info, dev_info, sizeof(*dev_info));
+        dev->id = ocrdma_get_instance();
+        if (dev->id < 0)
+                goto idr_err;
+
+        status = ocrdma_init_hw(dev);
+        if (status)
+                goto init_err;
+
+        status = ocrdma_alloc_resources(dev);
+        if (status)
+                goto alloc_err;
+
+        status = ocrdma_build_sgid_tbl(dev);
+        if (status)
+                goto alloc_err;
+
+        status = ocrdma_register_device(dev);
+        if (status)
+                goto alloc_err;
+
+        mutex_lock(&ocrdma_devlist_lock);
+        list_add_tail(&dev->entry, &ocrdma_dev_list);
+        mutex_unlock(&ocrdma_devlist_lock);
+        return dev;
+
+alloc_err:
+        ocrdma_free_resources(dev);
+        ocrdma_cleanup_hw(dev);
+init_err:
+        idr_remove(&ocrdma_dev_id, dev->id);
+idr_err:
+        kfree(dev->mbx_cmd);
+        ib_dealloc_device(&dev->ibdev);
+        ocrdma_err("%s() leaving. ret=%d\n", __func__, status);
+        return NULL;
+}
+
+static void ocrdma_remove(struct ocrdma_dev *dev)
+{
+        /* first unregister with stack to stop all the active traffic
+         * of the registered clients.
+         */
+        ib_unregister_device(&dev->ibdev);
+
+        mutex_lock(&ocrdma_devlist_lock);
+        list_del(&dev->entry);
+        mutex_unlock(&ocrdma_devlist_lock);
+
+        ocrdma_free_resources(dev);
+        ocrdma_cleanup_hw(dev);
+
+        idr_remove(&ocrdma_dev_id, dev->id);
+        kfree(dev->mbx_cmd);
+        ib_dealloc_device(&dev->ibdev);
+}
+
+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) {
+                                /* 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;
+}
+
+/* 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;
+        };
+}
+
+struct ocrdma_driver ocrdma_drv = {
+        .name                   = "ocrdma_driver",
+        .add                    = ocrdma_add,
+        .remove                 = ocrdma_remove,
+        .state_change_handler   = ocrdma_event_handler,
+};
+
+static int __init ocrdma_init_module(void)
+{
+        int status;
+
+        status = register_inet6addr_notifier(&ocrdma_inet6addr_notifier);
+        if (status)
+                return status;
+        status = be_roce_register_driver(&ocrdma_drv);
+        if (status)
+                unregister_inet6addr_notifier(&ocrdma_inet6addr_notifier);
+        return status;
+}
+
+static void __exit ocrdma_exit_module(void)
+{
+        be_roce_unregister_driver(&ocrdma_drv);
+        unregister_inet6addr_notifier(&ocrdma_inet6addr_notifier);
+}
+
+module_init(ocrdma_init_module);
+module_exit(ocrdma_exit_module);