linux/drivers/infiniband/hw/ocrdma/ocrdma_main.c

581 lines
15 KiB
C

/*******************************************************************
* 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/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_SPINLOCK(ocrdma_devlist_lock);
static DEFINE_IDR(ocrdma_dev_id);
static union ib_gid ocrdma_zero_sgid;
static 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 bool ocrdma_add_sgid(struct ocrdma_dev *dev, unsigned char *mac_addr,
bool is_vlan, u16 vlan_id)
{
int i;
union ib_gid new_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 */
memcpy(&dev->sgid_tbl[i], &new_sgid,
sizeof(union ib_gid));
spin_unlock_irqrestore(&dev->sgid_lock, flags);
return true;
} 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 false;
}
}
spin_unlock_irqrestore(&dev->sgid_lock, flags);
return false;
}
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]);
}
#if IS_ENABLED(CONFIG_VLAN_8021Q)
static void ocrdma_add_vlan_sgids(struct ocrdma_dev *dev)
{
struct net_device *netdev, *tmp;
u16 vlan_id;
bool is_vlan;
netdev = dev->nic_info.netdev;
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();
}
#else
static void ocrdma_add_vlan_sgids(struct ocrdma_dev *dev)
{
}
#endif /* VLAN */
static int ocrdma_build_sgid_tbl(struct ocrdma_dev *dev)
{
ocrdma_add_default_sgid(dev);
ocrdma_add_vlan_sgids(dev);
return 0;
}
#if IS_ENABLED(CONFIG_IPV6)
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 *netdev = ifa->idev->dev;
struct ib_event gid_event;
struct ocrdma_dev *dev;
bool found = false;
bool updated = false;
bool is_vlan = false;
u16 vid = 0;
is_vlan = netdev->priv_flags & IFF_802_1Q_VLAN;
if (is_vlan) {
vid = vlan_dev_vlan_id(netdev);
netdev = vlan_dev_real_dev(netdev);
}
rcu_read_lock();
list_for_each_entry_rcu(dev, &ocrdma_dev_list, entry) {
if (dev->nic_info.netdev == netdev) {
found = true;
break;
}
}
rcu_read_unlock();
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:
updated = ocrdma_add_sgid(dev, netdev->dev_addr, is_vlan, vid);
break;
case NETDEV_DOWN:
updated = ocrdma_del_sgid(dev, netdev->dev_addr, is_vlan, vid);
break;
default:
break;
}
if (updated) {
/* GID table updated, 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);
}
mutex_unlock(&dev->dev_lock);
return NOTIFY_OK;
}
static struct notifier_block ocrdma_inet6addr_notifier = {
.notifier_call = ocrdma_inet6addr_event
};
#endif /* IPV6 and VLAN */
static enum rdma_link_layer ocrdma_link_layer(struct ib_device *device,
u8 port_num)
{
return IB_LINK_LAYER_ETHERNET;
}
static 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;
spin_lock(&ocrdma_devlist_lock);
list_add_tail_rcu(&dev->entry, &ocrdma_dev_list);
spin_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_free(struct rcu_head *rcu)
{
struct ocrdma_dev *dev = container_of(rcu, struct ocrdma_dev, rcu);
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 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);
spin_lock(&ocrdma_devlist_lock);
list_del_rcu(&dev->entry);
spin_unlock(&ocrdma_devlist_lock);
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) {
/* 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;
};
}
static struct ocrdma_driver ocrdma_drv = {
.name = "ocrdma_driver",
.add = ocrdma_add,
.remove = ocrdma_remove,
.state_change_handler = ocrdma_event_handler,
};
static void ocrdma_unregister_inet6addr_notifier(void)
{
#if IS_ENABLED(CONFIG_IPV6)
unregister_inet6addr_notifier(&ocrdma_inet6addr_notifier);
#endif
}
static int __init ocrdma_init_module(void)
{
int status;
#if IS_ENABLED(CONFIG_IPV6)
status = register_inet6addr_notifier(&ocrdma_inet6addr_notifier);
if (status)
return status;
#endif
status = be_roce_register_driver(&ocrdma_drv);
if (status)
ocrdma_unregister_inet6addr_notifier();
return status;
}
static void __exit ocrdma_exit_module(void)
{
be_roce_unregister_driver(&ocrdma_drv);
ocrdma_unregister_inet6addr_notifier();
}
module_init(ocrdma_init_module);
module_exit(ocrdma_exit_module);