463 lines
10 KiB
C
463 lines
10 KiB
C
/**************************************************************************
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Copyright (c) 2007-2008, Chelsio Inc.
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are met:
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1. Redistributions of source code must retain the above copyright notice,
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this list of conditions and the following disclaimer.
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2. Neither the name of the Chelsio Corporation nor the names of its
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contributors may be used to endorse or promote products derived from
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this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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POSSIBILITY OF SUCH DAMAGE.
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***************************************************************************/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/bus.h>
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#include <sys/module.h>
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#include <sys/pciio.h>
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#include <sys/conf.h>
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#include <machine/bus.h>
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#include <machine/resource.h>
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#include <sys/bus_dma.h>
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#include <sys/rman.h>
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#include <sys/ioccom.h>
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#include <sys/mbuf.h>
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#include <sys/linker.h>
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#include <sys/firmware.h>
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#include <sys/socket.h>
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#include <sys/sockio.h>
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#include <sys/smp.h>
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#include <sys/sysctl.h>
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#include <sys/syslog.h>
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#include <sys/queue.h>
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#include <sys/taskqueue.h>
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#include <sys/proc.h>
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#include <cxgb_include.h>
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#include <net/route.h>
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#define VALIDATE_TID 0
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MALLOC_DEFINE(M_CXGB, "cxgb", "Chelsio 10 Gigabit Ethernet and services");
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TAILQ_HEAD(, cxgb_client) client_list;
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TAILQ_HEAD(, t3cdev) ofld_dev_list;
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static struct mtx cxgb_db_lock;
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static int inited = 0;
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static inline int
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offload_activated(struct t3cdev *tdev)
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{
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struct adapter *adapter = tdev2adap(tdev);
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return (isset(&adapter->open_device_map, OFFLOAD_DEVMAP_BIT));
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}
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static inline void
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register_tdev(struct t3cdev *tdev)
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{
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static int unit;
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mtx_lock(&cxgb_db_lock);
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snprintf(tdev->name, sizeof(tdev->name), "ofld_dev%d", unit++);
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TAILQ_INSERT_TAIL(&ofld_dev_list, tdev, entry);
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mtx_unlock(&cxgb_db_lock);
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}
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static inline void
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unregister_tdev(struct t3cdev *tdev)
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{
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mtx_lock(&cxgb_db_lock);
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TAILQ_REMOVE(&ofld_dev_list, tdev, entry);
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mtx_unlock(&cxgb_db_lock);
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}
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#ifndef TCP_OFFLOAD_DISABLE
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/**
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* cxgb_register_client - register an offload client
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* @client: the client
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*
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* Add the client to the client list,
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* and call backs the client for each activated offload device
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*/
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void
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cxgb_register_client(struct cxgb_client *client)
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{
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struct t3cdev *tdev;
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mtx_lock(&cxgb_db_lock);
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TAILQ_INSERT_TAIL(&client_list, client, client_entry);
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if (client->add) {
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TAILQ_FOREACH(tdev, &ofld_dev_list, entry) {
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if (offload_activated(tdev)) {
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client->add(tdev);
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} else
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CTR1(KTR_CXGB,
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"cxgb_register_client: %p not activated", tdev);
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}
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}
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mtx_unlock(&cxgb_db_lock);
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}
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/**
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* cxgb_unregister_client - unregister an offload client
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* @client: the client
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*
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* Remove the client to the client list,
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* and call backs the client for each activated offload device.
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*/
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void
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cxgb_unregister_client(struct cxgb_client *client)
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{
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struct t3cdev *tdev;
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mtx_lock(&cxgb_db_lock);
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TAILQ_REMOVE(&client_list, client, client_entry);
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if (client->remove) {
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TAILQ_FOREACH(tdev, &ofld_dev_list, entry) {
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if (offload_activated(tdev))
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client->remove(tdev);
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}
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}
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mtx_unlock(&cxgb_db_lock);
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}
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/**
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* cxgb_add_clients - activate register clients for an offload device
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* @tdev: the offload device
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*
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* Call backs all registered clients once a offload device is activated
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*/
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void
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cxgb_add_clients(struct t3cdev *tdev)
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{
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struct cxgb_client *client;
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mtx_lock(&cxgb_db_lock);
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TAILQ_FOREACH(client, &client_list, client_entry) {
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if (client->add)
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client->add(tdev);
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}
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mtx_unlock(&cxgb_db_lock);
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}
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/**
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* cxgb_remove_clients - activate register clients for an offload device
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* @tdev: the offload device
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*
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* Call backs all registered clients once a offload device is deactivated
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*/
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void
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cxgb_remove_clients(struct t3cdev *tdev)
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{
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struct cxgb_client *client;
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mtx_lock(&cxgb_db_lock);
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TAILQ_FOREACH(client, &client_list, client_entry) {
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if (client->remove)
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client->remove(tdev);
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}
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mtx_unlock(&cxgb_db_lock);
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}
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#endif
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/**
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* cxgb_ofld_recv - process n received offload packets
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* @dev: the offload device
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* @m: an array of offload packets
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* @n: the number of offload packets
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*
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* Process an array of ingress offload packets. Each packet is forwarded
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* to any active network taps and then passed to the offload device's receive
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* method. We optimize passing packets to the receive method by passing
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* it the whole array at once except when there are active taps.
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*/
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int
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cxgb_ofld_recv(struct t3cdev *dev, struct mbuf **m, int n)
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{
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return dev->recv(dev, m, n);
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}
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/*
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* Dummy handler for Rx offload packets in case we get an offload packet before
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* proper processing is setup. This complains and drops the packet as it isn't
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* normal to get offload packets at this stage.
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*/
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static int
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rx_offload_blackhole(struct t3cdev *dev, struct mbuf **m, int n)
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{
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while (n--)
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m_freem(m[n]);
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return 0;
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}
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static void
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dummy_neigh_update(struct t3cdev *dev, struct rtentry *neigh, uint8_t *enaddr,
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struct sockaddr *sa)
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{
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}
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void
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cxgb_set_dummy_ops(struct t3cdev *dev)
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{
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dev->recv = rx_offload_blackhole;
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dev->arp_update = dummy_neigh_update;
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}
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static int
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do_smt_write_rpl(struct t3cdev *dev, struct mbuf *m)
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{
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struct cpl_smt_write_rpl *rpl = cplhdr(m);
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if (rpl->status != CPL_ERR_NONE)
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log(LOG_ERR,
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"Unexpected SMT_WRITE_RPL status %u for entry %u\n",
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rpl->status, GET_TID(rpl));
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return CPL_RET_BUF_DONE;
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}
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static int
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do_l2t_write_rpl(struct t3cdev *dev, struct mbuf *m)
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{
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struct cpl_l2t_write_rpl *rpl = cplhdr(m);
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if (rpl->status != CPL_ERR_NONE)
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log(LOG_ERR,
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"Unexpected L2T_WRITE_RPL status %u for entry %u\n",
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rpl->status, GET_TID(rpl));
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return CPL_RET_BUF_DONE;
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}
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static int
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do_rte_write_rpl(struct t3cdev *dev, struct mbuf *m)
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{
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struct cpl_rte_write_rpl *rpl = cplhdr(m);
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if (rpl->status != CPL_ERR_NONE)
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log(LOG_ERR,
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"Unexpected L2T_WRITE_RPL status %u for entry %u\n",
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rpl->status, GET_TID(rpl));
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return CPL_RET_BUF_DONE;
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}
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static int
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do_set_tcb_rpl(struct t3cdev *dev, struct mbuf *m)
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{
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struct cpl_set_tcb_rpl *rpl = cplhdr(m);
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if (rpl->status != CPL_ERR_NONE)
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log(LOG_ERR,
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"Unexpected SET_TCB_RPL status %u for tid %u\n",
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rpl->status, GET_TID(rpl));
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return CPL_RET_BUF_DONE;
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}
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static int
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do_trace(struct t3cdev *dev, struct mbuf *m)
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{
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#if 0
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struct cpl_trace_pkt *p = cplhdr(m);
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skb->protocol = 0xffff;
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skb->dev = dev->lldev;
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skb_pull(skb, sizeof(*p));
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skb->mac.raw = mtod(m, (char *));
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netif_receive_skb(skb);
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#endif
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return 0;
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}
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/*
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* Process a received packet with an unknown/unexpected CPL opcode.
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*/
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static int
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do_bad_cpl(struct t3cdev *dev, struct mbuf *m)
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{
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log(LOG_ERR, "%s: received bad CPL command 0x%x\n", dev->name,
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0xFF & *mtod(m, uint32_t *));
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return (CPL_RET_BUF_DONE | CPL_RET_BAD_MSG);
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}
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/*
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* Handlers for each CPL opcode
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*/
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static cpl_handler_func cpl_handlers[256];
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/*
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* T3CDEV's receive method.
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*/
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int
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process_rx(struct t3cdev *dev, struct mbuf **m, int n)
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{
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while (n--) {
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struct mbuf *m0 = *m++;
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unsigned int opcode = G_OPCODE(ntohl(m0->m_pkthdr.csum_data));
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int ret;
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DPRINTF("processing op=0x%x m=%p data=%p\n", opcode, m0, m0->m_data);
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ret = cpl_handlers[opcode] (dev, m0);
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#if VALIDATE_TID
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if (ret & CPL_RET_UNKNOWN_TID) {
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union opcode_tid *p = cplhdr(m0);
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log(LOG_ERR, "%s: CPL message (opcode %u) had "
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"unknown TID %u\n", dev->name, opcode,
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G_TID(ntohl(p->opcode_tid)));
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}
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#endif
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if (ret & CPL_RET_BUF_DONE)
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m_freem(m0);
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}
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return 0;
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}
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/*
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* Add a new handler to the CPL dispatch table. A NULL handler may be supplied
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* to unregister an existing handler.
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*/
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void
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t3_register_cpl_handler(unsigned int opcode, cpl_handler_func h)
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{
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if (opcode < NUM_CPL_CMDS)
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cpl_handlers[opcode] = h ? h : do_bad_cpl;
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else
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log(LOG_ERR, "T3C: handler registration for "
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"opcode %x failed\n", opcode);
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}
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/*
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* Allocate a chunk of memory using kmalloc or, if that fails, vmalloc.
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* The allocated memory is cleared.
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*/
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void *
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cxgb_alloc_mem(unsigned long size)
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{
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return malloc(size, M_CXGB, M_ZERO|M_NOWAIT);
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}
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/*
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* Free memory allocated through t3_alloc_mem().
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*/
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void
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cxgb_free_mem(void *addr)
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{
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free(addr, M_CXGB);
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}
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static __inline int
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adap2type(struct adapter *adapter)
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{
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int type = 0;
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switch (adapter->params.rev) {
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case T3_REV_A:
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type = T3A;
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break;
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case T3_REV_B:
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case T3_REV_B2:
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type = T3B;
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break;
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case T3_REV_C:
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type = T3C;
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break;
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}
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return type;
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}
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void
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cxgb_adapter_ofld(struct adapter *adapter)
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{
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struct t3cdev *tdev = &adapter->tdev;
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cxgb_set_dummy_ops(tdev);
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tdev->type = adap2type(adapter);
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tdev->adapter = adapter;
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register_tdev(tdev);
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}
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void
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cxgb_adapter_unofld(struct adapter *adapter)
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{
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struct t3cdev *tdev = &adapter->tdev;
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tdev->recv = NULL;
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tdev->arp_update = NULL;
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unregister_tdev(tdev);
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}
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void
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cxgb_offload_init(void)
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{
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int i;
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if (inited++)
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return;
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mtx_init(&cxgb_db_lock, "ofld db", NULL, MTX_DEF);
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TAILQ_INIT(&client_list);
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TAILQ_INIT(&ofld_dev_list);
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for (i = 0; i < 0x100; ++i)
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cpl_handlers[i] = do_bad_cpl;
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t3_register_cpl_handler(CPL_SMT_WRITE_RPL, do_smt_write_rpl);
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t3_register_cpl_handler(CPL_RTE_WRITE_RPL, do_rte_write_rpl);
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t3_register_cpl_handler(CPL_L2T_WRITE_RPL, do_l2t_write_rpl);
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t3_register_cpl_handler(CPL_SET_TCB_RPL, do_set_tcb_rpl);
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t3_register_cpl_handler(CPL_TRACE_PKT, do_trace);
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}
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void
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cxgb_offload_exit(void)
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{
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if (--inited)
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return;
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mtx_destroy(&cxgb_db_lock);
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}
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MODULE_VERSION(if_cxgb, 1);
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