--- /dev/null
+/*
+ * Copyright (c) 2006-2008 Chelsio, Inc. All rights reserved.
+ *
+ * This software is available to you under a choice of one of two
+ * licenses. You may choose to be licensed under the terms of the GNU
+ * General Public License (GPL) Version 2, available from the file
+ * COPYING in the main directory of this source tree, or the
+ * OpenIB.org BSD license below:
+ *
+ * Redistribution and use in source and binary forms, with or
+ * without modification, are permitted provided that the following
+ * conditions are met:
+ *
+ * - Redistributions of source code must retain the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer.
+ *
+ * - Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer in the documentation and/or other materials
+ * provided with the distribution.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/list.h>
+#include <linux/slab.h>
+#include <net/neighbour.h>
+#include <linux/notifier.h>
+#include <linux/atomic.h>
+#include <linux/proc_fs.h>
+#include <linux/if_vlan.h>
+#include <net/netevent.h>
+#include <linux/highmem.h>
+#include <linux/vmalloc.h>
+#include <linux/export.h>
+
+#include "common.h"
+#include "regs.h"
+#include "cxgb3_ioctl.h"
+#include "cxgb3_ctl_defs.h"
+#include "cxgb3_defs.h"
+#include "l2t.h"
+#include "firmware_exports.h"
+#include "cxgb3_offload.h"
+
+static LIST_HEAD(client_list);
+static LIST_HEAD(ofld_dev_list);
+static DEFINE_MUTEX(cxgb3_db_lock);
+
+static DEFINE_RWLOCK(adapter_list_lock);
+static LIST_HEAD(adapter_list);
+
+static const unsigned int MAX_ATIDS = 64 * 1024;
+static const unsigned int ATID_BASE = 0x10000;
+
+static void cxgb_neigh_update(struct neighbour *neigh);
+static void cxgb_redirect(struct dst_entry *old, struct dst_entry *new,
+ struct neighbour *neigh, const void *daddr);
+
+static inline int offload_activated(struct t3cdev *tdev)
+{
+ const struct adapter *adapter = tdev2adap(tdev);
+
+ return test_bit(OFFLOAD_DEVMAP_BIT, &adapter->open_device_map);
+}
+
+/**
+ * cxgb3_register_client - register an offload client
+ * @client: the client
+ *
+ * Add the client to the client list,
+ * and call backs the client for each activated offload device
+ */
+void cxgb3_register_client(struct cxgb3_client *client)
+{
+ struct t3cdev *tdev;
+
+ mutex_lock(&cxgb3_db_lock);
+ list_add_tail(&client->client_list, &client_list);
+
+ if (client->add) {
+ list_for_each_entry(tdev, &ofld_dev_list, ofld_dev_list) {
+ if (offload_activated(tdev))
+ client->add(tdev);
+ }
+ }
+ mutex_unlock(&cxgb3_db_lock);
+}
+
+EXPORT_SYMBOL(cxgb3_register_client);
+
+/**
+ * cxgb3_unregister_client - unregister an offload client
+ * @client: the client
+ *
+ * Remove the client to the client list,
+ * and call backs the client for each activated offload device.
+ */
+void cxgb3_unregister_client(struct cxgb3_client *client)
+{
+ struct t3cdev *tdev;
+
+ mutex_lock(&cxgb3_db_lock);
+ list_del(&client->client_list);
+
+ if (client->remove) {
+ list_for_each_entry(tdev, &ofld_dev_list, ofld_dev_list) {
+ if (offload_activated(tdev))
+ client->remove(tdev);
+ }
+ }
+ mutex_unlock(&cxgb3_db_lock);
+}
+
+EXPORT_SYMBOL(cxgb3_unregister_client);
+
+/**
+ * cxgb3_add_clients - activate registered clients for an offload device
+ * @tdev: the offload device
+ *
+ * Call backs all registered clients once a offload device is activated
+ */
+void cxgb3_add_clients(struct t3cdev *tdev)
+{
+ struct cxgb3_client *client;
+
+ mutex_lock(&cxgb3_db_lock);
+ list_for_each_entry(client, &client_list, client_list) {
+ if (client->add)
+ client->add(tdev);
+ }
+ mutex_unlock(&cxgb3_db_lock);
+}
+
+/**
+ * cxgb3_remove_clients - deactivates registered clients
+ * for an offload device
+ * @tdev: the offload device
+ *
+ * Call backs all registered clients once a offload device is deactivated
+ */
+void cxgb3_remove_clients(struct t3cdev *tdev)
+{
+ struct cxgb3_client *client;
+
+ mutex_lock(&cxgb3_db_lock);
+ list_for_each_entry(client, &client_list, client_list) {
+ if (client->remove)
+ client->remove(tdev);
+ }
+ mutex_unlock(&cxgb3_db_lock);
+}
+
+void cxgb3_event_notify(struct t3cdev *tdev, u32 event, u32 port)
+{
+ struct cxgb3_client *client;
+
+ mutex_lock(&cxgb3_db_lock);
+ list_for_each_entry(client, &client_list, client_list) {
+ if (client->event_handler)
+ client->event_handler(tdev, event, port);
+ }
+ mutex_unlock(&cxgb3_db_lock);
+}
+
+static struct net_device *get_iff_from_mac(struct adapter *adapter,
+ const unsigned char *mac,
+ unsigned int vlan)
+{
+ int i;
+
+ for_each_port(adapter, i) {
+ struct net_device *dev = adapter->port[i];
+
+ if (ether_addr_equal(dev->dev_addr, mac)) {
+ rcu_read_lock();
+ if (vlan && vlan != VLAN_VID_MASK) {
+ dev = __vlan_find_dev_deep_rcu(dev, htons(ETH_P_8021Q), vlan);
+ } else if (netif_is_bond_slave(dev)) {
+ struct net_device *upper_dev;
+
+ while ((upper_dev =
+ netdev_master_upper_dev_get_rcu(dev)))
+ dev = upper_dev;
+ }
+ rcu_read_unlock();
+ return dev;
+ }
+ }
+ return NULL;
+}
+
+static int cxgb_ulp_iscsi_ctl(struct adapter *adapter, unsigned int req,
+ void *data)
+{
+ int i;
+ int ret = 0;
+ unsigned int val = 0;
+ struct ulp_iscsi_info *uiip = data;
+
+ switch (req) {
+ case ULP_ISCSI_GET_PARAMS:
+ uiip->pdev = adapter->pdev;
+ uiip->llimit = t3_read_reg(adapter, A_ULPRX_ISCSI_LLIMIT);
+ uiip->ulimit = t3_read_reg(adapter, A_ULPRX_ISCSI_ULIMIT);
+ uiip->tagmask = t3_read_reg(adapter, A_ULPRX_ISCSI_TAGMASK);
+
+ val = t3_read_reg(adapter, A_ULPRX_ISCSI_PSZ);
+ for (i = 0; i < 4; i++, val >>= 8)
+ uiip->pgsz_factor[i] = val & 0xFF;
+
+ val = t3_read_reg(adapter, A_TP_PARA_REG7);
+ uiip->max_txsz =
+ uiip->max_rxsz = min((val >> S_PMMAXXFERLEN0)&M_PMMAXXFERLEN0,
+ (val >> S_PMMAXXFERLEN1)&M_PMMAXXFERLEN1);
+ /*
+ * On tx, the iscsi pdu has to be <= tx page size and has to
+ * fit into the Tx PM FIFO.
+ */
+ val = min(adapter->params.tp.tx_pg_size,
+ t3_read_reg(adapter, A_PM1_TX_CFG) >> 17);
+ uiip->max_txsz = min(val, uiip->max_txsz);
+
+ /* set MaxRxData to 16224 */
+ val = t3_read_reg(adapter, A_TP_PARA_REG2);
+ if ((val >> S_MAXRXDATA) != 0x3f60) {
+ val &= (M_RXCOALESCESIZE << S_RXCOALESCESIZE);
+ val |= V_MAXRXDATA(0x3f60);
+ pr_info("%s, iscsi set MaxRxData to 16224 (0x%x)\n",
+ adapter->name, val);
+ t3_write_reg(adapter, A_TP_PARA_REG2, val);
+ }
+
+ /*
+ * on rx, the iscsi pdu has to be < rx page size and the
+ * the max rx data length programmed in TP
+ */
+ val = min(adapter->params.tp.rx_pg_size,
+ ((t3_read_reg(adapter, A_TP_PARA_REG2)) >>
+ S_MAXRXDATA) & M_MAXRXDATA);
+ uiip->max_rxsz = min(val, uiip->max_rxsz);
+ break;
+ case ULP_ISCSI_SET_PARAMS:
+ t3_write_reg(adapter, A_ULPRX_ISCSI_TAGMASK, uiip->tagmask);
+ /* program the ddp page sizes */
+ for (i = 0; i < 4; i++)
+ val |= (uiip->pgsz_factor[i] & 0xF) << (8 * i);
+ if (val && (val != t3_read_reg(adapter, A_ULPRX_ISCSI_PSZ))) {
+ pr_info("%s, setting iscsi pgsz 0x%x, %u,%u,%u,%u\n",
+ adapter->name, val, uiip->pgsz_factor[0],
+ uiip->pgsz_factor[1], uiip->pgsz_factor[2],
+ uiip->pgsz_factor[3]);
+ t3_write_reg(adapter, A_ULPRX_ISCSI_PSZ, val);
+ }
+ break;
+ default:
+ ret = -EOPNOTSUPP;
+ }
+ return ret;
+}
+
+/* Response queue used for RDMA events. */
+#define ASYNC_NOTIF_RSPQ 0
+
+static int cxgb_rdma_ctl(struct adapter *adapter, unsigned int req, void *data)
+{
+ int ret = 0;
+
+ switch (req) {
+ case RDMA_GET_PARAMS: {
+ struct rdma_info *rdma = data;
+ struct pci_dev *pdev = adapter->pdev;
+
+ rdma->udbell_physbase = pci_resource_start(pdev, 2);
+ rdma->udbell_len = pci_resource_len(pdev, 2);
+ rdma->tpt_base =
+ t3_read_reg(adapter, A_ULPTX_TPT_LLIMIT);
+ rdma->tpt_top = t3_read_reg(adapter, A_ULPTX_TPT_ULIMIT);
+ rdma->pbl_base =
+ t3_read_reg(adapter, A_ULPTX_PBL_LLIMIT);
+ rdma->pbl_top = t3_read_reg(adapter, A_ULPTX_PBL_ULIMIT);
+ rdma->rqt_base = t3_read_reg(adapter, A_ULPRX_RQ_LLIMIT);
+ rdma->rqt_top = t3_read_reg(adapter, A_ULPRX_RQ_ULIMIT);
+ rdma->kdb_addr = adapter->regs + A_SG_KDOORBELL;
+ rdma->pdev = pdev;
+ break;
+ }
+ case RDMA_CQ_OP:{
+ unsigned long flags;
+ struct rdma_cq_op *rdma = data;
+
+ /* may be called in any context */
+ spin_lock_irqsave(&adapter->sge.reg_lock, flags);
+ ret = t3_sge_cqcntxt_op(adapter, rdma->id, rdma->op,
+ rdma->credits);
+ spin_unlock_irqrestore(&adapter->sge.reg_lock, flags);
+ break;
+ }
+ case RDMA_GET_MEM:{
+ struct ch_mem_range *t = data;
+ struct mc7 *mem;
+
+ if ((t->addr & 7) || (t->len & 7))
+ return -EINVAL;
+ if (t->mem_id == MEM_CM)
+ mem = &adapter->cm;
+ else if (t->mem_id == MEM_PMRX)
+ mem = &adapter->pmrx;
+ else if (t->mem_id == MEM_PMTX)
+ mem = &adapter->pmtx;
+ else
+ return -EINVAL;
+
+ ret =
+ t3_mc7_bd_read(mem, t->addr / 8, t->len / 8,
+ (u64 *) t->buf);
+ if (ret)
+ return ret;
+ break;
+ }
+ case RDMA_CQ_SETUP:{
+ struct rdma_cq_setup *rdma = data;
+
+ spin_lock_irq(&adapter->sge.reg_lock);
+ ret =
+ t3_sge_init_cqcntxt(adapter, rdma->id,
+ rdma->base_addr, rdma->size,
+ ASYNC_NOTIF_RSPQ,
+ rdma->ovfl_mode, rdma->credits,
+ rdma->credit_thres);
+ spin_unlock_irq(&adapter->sge.reg_lock);
+ break;
+ }
+ case RDMA_CQ_DISABLE:
+ spin_lock_irq(&adapter->sge.reg_lock);
+ ret = t3_sge_disable_cqcntxt(adapter, *(unsigned int *)data);
+ spin_unlock_irq(&adapter->sge.reg_lock);
+ break;
+ case RDMA_CTRL_QP_SETUP:{
+ struct rdma_ctrlqp_setup *rdma = data;
+
+ spin_lock_irq(&adapter->sge.reg_lock);
+ ret = t3_sge_init_ecntxt(adapter, FW_RI_SGEEC_START, 0,
+ SGE_CNTXT_RDMA,
+ ASYNC_NOTIF_RSPQ,
+ rdma->base_addr, rdma->size,
+ FW_RI_TID_START, 1, 0);
+ spin_unlock_irq(&adapter->sge.reg_lock);
+ break;
+ }
+ case RDMA_GET_MIB: {
+ spin_lock(&adapter->stats_lock);
+ t3_tp_get_mib_stats(adapter, (struct tp_mib_stats *)data);
+ spin_unlock(&adapter->stats_lock);
+ break;
+ }
+ default:
+ ret = -EOPNOTSUPP;
+ }
+ return ret;
+}
+
+static int cxgb_offload_ctl(struct t3cdev *tdev, unsigned int req, void *data)
+{
+ struct adapter *adapter = tdev2adap(tdev);
+ struct tid_range *tid;
+ struct mtutab *mtup;
+ struct iff_mac *iffmacp;
+ struct ddp_params *ddpp;
+ struct adap_ports *ports;
+ struct ofld_page_info *rx_page_info;
+ struct tp_params *tp = &adapter->params.tp;
+ int i;
+
+ switch (req) {
+ case GET_MAX_OUTSTANDING_WR:
+ *(unsigned int *)data = FW_WR_NUM;
+ break;
+ case GET_WR_LEN:
+ *(unsigned int *)data = WR_FLITS;
+ break;
+ case GET_TX_MAX_CHUNK:
+ *(unsigned int *)data = 1 << 20; /* 1MB */
+ break;
+ case GET_TID_RANGE:
+ tid = data;
+ tid->num = t3_mc5_size(&adapter->mc5) -
+ adapter->params.mc5.nroutes -
+ adapter->params.mc5.nfilters - adapter->params.mc5.nservers;
+ tid->base = 0;
+ break;
+ case GET_STID_RANGE:
+ tid = data;
+ tid->num = adapter->params.mc5.nservers;
+ tid->base = t3_mc5_size(&adapter->mc5) - tid->num -
+ adapter->params.mc5.nfilters - adapter->params.mc5.nroutes;
+ break;
+ case GET_L2T_CAPACITY:
+ *(unsigned int *)data = 2048;
+ break;
+ case GET_MTUS:
+ mtup = data;
+ mtup->size = NMTUS;
+ mtup->mtus = adapter->params.mtus;
+ break;
+ case GET_IFF_FROM_MAC:
+ iffmacp = data;
+ iffmacp->dev = get_iff_from_mac(adapter, iffmacp->mac_addr,
+ iffmacp->vlan_tag &
+ VLAN_VID_MASK);
+ break;
+ case GET_DDP_PARAMS:
+ ddpp = data;
+ ddpp->llimit = t3_read_reg(adapter, A_ULPRX_TDDP_LLIMIT);
+ ddpp->ulimit = t3_read_reg(adapter, A_ULPRX_TDDP_ULIMIT);
+ ddpp->tag_mask = t3_read_reg(adapter, A_ULPRX_TDDP_TAGMASK);
+ break;
+ case GET_PORTS:
+ ports = data;
+ ports->nports = adapter->params.nports;
+ for_each_port(adapter, i)
+ ports->lldevs[i] = adapter->port[i];
+ break;
+ case ULP_ISCSI_GET_PARAMS:
+ case ULP_ISCSI_SET_PARAMS:
+ if (!offload_running(adapter))
+ return -EAGAIN;
+ return cxgb_ulp_iscsi_ctl(adapter, req, data);
+ case RDMA_GET_PARAMS:
+ case RDMA_CQ_OP:
+ case RDMA_CQ_SETUP:
+ case RDMA_CQ_DISABLE:
+ case RDMA_CTRL_QP_SETUP:
+ case RDMA_GET_MEM:
+ case RDMA_GET_MIB:
+ if (!offload_running(adapter))
+ return -EAGAIN;
+ return cxgb_rdma_ctl(adapter, req, data);
+ case GET_RX_PAGE_INFO:
+ rx_page_info = data;
+ rx_page_info->page_size = tp->rx_pg_size;
+ rx_page_info->num = tp->rx_num_pgs;
+ break;
+ case GET_ISCSI_IPV4ADDR: {
+ struct iscsi_ipv4addr *p = data;
+ struct port_info *pi = netdev_priv(p->dev);
+ p->ipv4addr = pi->iscsi_ipv4addr;
+ break;
+ }
+ case GET_EMBEDDED_INFO: {
+ struct ch_embedded_info *e = data;
+
+ spin_lock(&adapter->stats_lock);
+ t3_get_fw_version(adapter, &e->fw_vers);
+ t3_get_tp_version(adapter, &e->tp_vers);
+ spin_unlock(&adapter->stats_lock);
+ break;
+ }
+ default:
+ return -EOPNOTSUPP;
+ }
+ return 0;
+}
+
+/*
+ * Dummy handler for Rx offload packets in case we get an offload packet before
+ * proper processing is setup. This complains and drops the packet as it isn't
+ * normal to get offload packets at this stage.
+ */
+static int rx_offload_blackhole(struct t3cdev *dev, struct sk_buff **skbs,
+ int n)
+{
+ while (n--)
+ dev_kfree_skb_any(skbs[n]);
+ return 0;
+}
+
+static void dummy_neigh_update(struct t3cdev *dev, struct neighbour *neigh)
+{
+}
+
+void cxgb3_set_dummy_ops(struct t3cdev *dev)
+{
+ dev->recv = rx_offload_blackhole;
+ dev->neigh_update = dummy_neigh_update;
+}
+
+/*
+ * Free an active-open TID.
+ */
+void *cxgb3_free_atid(struct t3cdev *tdev, int atid)
+{
+ struct tid_info *t = &(T3C_DATA(tdev))->tid_maps;
+ union active_open_entry *p = atid2entry(t, atid);
+ void *ctx = p->t3c_tid.ctx;
+
+ spin_lock_bh(&t->atid_lock);
+ p->next = t->afree;
+ t->afree = p;
+ t->atids_in_use--;
+ spin_unlock_bh(&t->atid_lock);
+
+ return ctx;
+}
+
+EXPORT_SYMBOL(cxgb3_free_atid);
+
+/*
+ * Free a server TID and return it to the free pool.
+ */
+void cxgb3_free_stid(struct t3cdev *tdev, int stid)
+{
+ struct tid_info *t = &(T3C_DATA(tdev))->tid_maps;
+ union listen_entry *p = stid2entry(t, stid);
+
+ spin_lock_bh(&t->stid_lock);
+ p->next = t->sfree;
+ t->sfree = p;
+ t->stids_in_use--;
+ spin_unlock_bh(&t->stid_lock);
+}
+
+EXPORT_SYMBOL(cxgb3_free_stid);
+
+void cxgb3_insert_tid(struct t3cdev *tdev, struct cxgb3_client *client,
+ void *ctx, unsigned int tid)
+{
+ struct tid_info *t = &(T3C_DATA(tdev))->tid_maps;
+
+ t->tid_tab[tid].client = client;
+ t->tid_tab[tid].ctx = ctx;
+ atomic_inc(&t->tids_in_use);
+}
+
+EXPORT_SYMBOL(cxgb3_insert_tid);
+
+/*
+ * Populate a TID_RELEASE WR. The skb must be already propely sized.
+ */
+static inline void mk_tid_release(struct sk_buff *skb, unsigned int tid)
+{
+ struct cpl_tid_release *req;
+
+ skb->priority = CPL_PRIORITY_SETUP;
+ req = (struct cpl_tid_release *)__skb_put(skb, sizeof(*req));
+ req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD));
+ OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_TID_RELEASE, tid));
+}
+
+static void t3_process_tid_release_list(struct work_struct *work)
+{
+ struct t3c_data *td = container_of(work, struct t3c_data,
+ tid_release_task);
+ struct sk_buff *skb;
+ struct t3cdev *tdev = td->dev;
+
+
+ spin_lock_bh(&td->tid_release_lock);
+ while (td->tid_release_list) {
+ struct t3c_tid_entry *p = td->tid_release_list;
+
+ td->tid_release_list = p->ctx;
+ spin_unlock_bh(&td->tid_release_lock);
+
+ skb = alloc_skb(sizeof(struct cpl_tid_release),
+ GFP_KERNEL);
+ if (!skb)
+ skb = td->nofail_skb;
+ if (!skb) {
+ spin_lock_bh(&td->tid_release_lock);
+ p->ctx = (void *)td->tid_release_list;
+ td->tid_release_list = p;
+ break;
+ }
+ mk_tid_release(skb, p - td->tid_maps.tid_tab);
+ cxgb3_ofld_send(tdev, skb);
+ p->ctx = NULL;
+ if (skb == td->nofail_skb)
+ td->nofail_skb =
+ alloc_skb(sizeof(struct cpl_tid_release),
+ GFP_KERNEL);
+ spin_lock_bh(&td->tid_release_lock);
+ }
+ td->release_list_incomplete = (td->tid_release_list == NULL) ? 0 : 1;
+ spin_unlock_bh(&td->tid_release_lock);
+
+ if (!td->nofail_skb)
+ td->nofail_skb =
+ alloc_skb(sizeof(struct cpl_tid_release),
+ GFP_KERNEL);
+}
+
+/* use ctx as a next pointer in the tid release list */
+void cxgb3_queue_tid_release(struct t3cdev *tdev, unsigned int tid)
+{
+ struct t3c_data *td = T3C_DATA(tdev);
+ struct t3c_tid_entry *p = &td->tid_maps.tid_tab[tid];
+
+ spin_lock_bh(&td->tid_release_lock);
+ p->ctx = (void *)td->tid_release_list;
+ p->client = NULL;
+ td->tid_release_list = p;
+ if (!p->ctx || td->release_list_incomplete)
+ schedule_work(&td->tid_release_task);
+ spin_unlock_bh(&td->tid_release_lock);
+}
+
+EXPORT_SYMBOL(cxgb3_queue_tid_release);
+
+/*
+ * Remove a tid from the TID table. A client may defer processing its last
+ * CPL message if it is locked at the time it arrives, and while the message
+ * sits in the client's backlog the TID may be reused for another connection.
+ * To handle this we atomically switch the TID association if it still points
+ * to the original client context.
+ */
+void cxgb3_remove_tid(struct t3cdev *tdev, void *ctx, unsigned int tid)
+{
+ struct tid_info *t = &(T3C_DATA(tdev))->tid_maps;
+
+ BUG_ON(tid >= t->ntids);
+ if (tdev->type == T3A)
+ (void)cmpxchg(&t->tid_tab[tid].ctx, ctx, NULL);
+ else {
+ struct sk_buff *skb;
+
+ skb = alloc_skb(sizeof(struct cpl_tid_release), GFP_ATOMIC);
+ if (likely(skb)) {
+ mk_tid_release(skb, tid);
+ cxgb3_ofld_send(tdev, skb);
+ t->tid_tab[tid].ctx = NULL;
+ } else
+ cxgb3_queue_tid_release(tdev, tid);
+ }
+ atomic_dec(&t->tids_in_use);
+}
+
+EXPORT_SYMBOL(cxgb3_remove_tid);
+
+int cxgb3_alloc_atid(struct t3cdev *tdev, struct cxgb3_client *client,
+ void *ctx)
+{
+ int atid = -1;
+ struct tid_info *t = &(T3C_DATA(tdev))->tid_maps;
+
+ spin_lock_bh(&t->atid_lock);
+ if (t->afree &&
+ t->atids_in_use + atomic_read(&t->tids_in_use) + MC5_MIN_TIDS <=
+ t->ntids) {
+ union active_open_entry *p = t->afree;
+
+ atid = (p - t->atid_tab) + t->atid_base;
+ t->afree = p->next;
+ p->t3c_tid.ctx = ctx;
+ p->t3c_tid.client = client;
+ t->atids_in_use++;
+ }
+ spin_unlock_bh(&t->atid_lock);
+ return atid;
+}
+
+EXPORT_SYMBOL(cxgb3_alloc_atid);
+
+int cxgb3_alloc_stid(struct t3cdev *tdev, struct cxgb3_client *client,
+ void *ctx)
+{
+ int stid = -1;
+ struct tid_info *t = &(T3C_DATA(tdev))->tid_maps;
+
+ spin_lock_bh(&t->stid_lock);
+ if (t->sfree) {
+ union listen_entry *p = t->sfree;
+
+ stid = (p - t->stid_tab) + t->stid_base;
+ t->sfree = p->next;
+ p->t3c_tid.ctx = ctx;
+ p->t3c_tid.client = client;
+ t->stids_in_use++;
+ }
+ spin_unlock_bh(&t->stid_lock);
+ return stid;
+}
+
+EXPORT_SYMBOL(cxgb3_alloc_stid);
+
+/* Get the t3cdev associated with a net_device */
+struct t3cdev *dev2t3cdev(struct net_device *dev)
+{
+ const struct port_info *pi = netdev_priv(dev);
+
+ return (struct t3cdev *)pi->adapter;
+}
+
+EXPORT_SYMBOL(dev2t3cdev);
+
+static int do_smt_write_rpl(struct t3cdev *dev, struct sk_buff *skb)
+{
+ struct cpl_smt_write_rpl *rpl = cplhdr(skb);
+
+ if (rpl->status != CPL_ERR_NONE)
+ pr_err("Unexpected SMT_WRITE_RPL status %u for entry %u\n",
+ rpl->status, GET_TID(rpl));
+
+ return CPL_RET_BUF_DONE;
+}
+
+static int do_l2t_write_rpl(struct t3cdev *dev, struct sk_buff *skb)
+{
+ struct cpl_l2t_write_rpl *rpl = cplhdr(skb);
+
+ if (rpl->status != CPL_ERR_NONE)
+ pr_err("Unexpected L2T_WRITE_RPL status %u for entry %u\n",
+ rpl->status, GET_TID(rpl));
+
+ return CPL_RET_BUF_DONE;
+}
+
+static int do_rte_write_rpl(struct t3cdev *dev, struct sk_buff *skb)
+{
+ struct cpl_rte_write_rpl *rpl = cplhdr(skb);
+
+ if (rpl->status != CPL_ERR_NONE)
+ pr_err("Unexpected RTE_WRITE_RPL status %u for entry %u\n",
+ rpl->status, GET_TID(rpl));
+
+ return CPL_RET_BUF_DONE;
+}
+
+static int do_act_open_rpl(struct t3cdev *dev, struct sk_buff *skb)
+{
+ struct cpl_act_open_rpl *rpl = cplhdr(skb);
+ unsigned int atid = G_TID(ntohl(rpl->atid));
+ struct t3c_tid_entry *t3c_tid;
+
+ t3c_tid = lookup_atid(&(T3C_DATA(dev))->tid_maps, atid);
+ if (t3c_tid && t3c_tid->ctx && t3c_tid->client &&
+ t3c_tid->client->handlers &&
+ t3c_tid->client->handlers[CPL_ACT_OPEN_RPL]) {
+ return t3c_tid->client->handlers[CPL_ACT_OPEN_RPL] (dev, skb,
+ t3c_tid->
+ ctx);
+ } else {
+ pr_err("%s: received clientless CPL command 0x%x\n",
+ dev->name, CPL_ACT_OPEN_RPL);
+ return CPL_RET_BUF_DONE | CPL_RET_BAD_MSG;
+ }
+}
+
+static int do_stid_rpl(struct t3cdev *dev, struct sk_buff *skb)
+{
+ union opcode_tid *p = cplhdr(skb);
+ unsigned int stid = G_TID(ntohl(p->opcode_tid));
+ struct t3c_tid_entry *t3c_tid;
+
+ t3c_tid = lookup_stid(&(T3C_DATA(dev))->tid_maps, stid);
+ if (t3c_tid && t3c_tid->ctx && t3c_tid->client->handlers &&
+ t3c_tid->client->handlers[p->opcode]) {
+ return t3c_tid->client->handlers[p->opcode] (dev, skb,
+ t3c_tid->ctx);
+ } else {
+ pr_err("%s: received clientless CPL command 0x%x\n",
+ dev->name, p->opcode);
+ return CPL_RET_BUF_DONE | CPL_RET_BAD_MSG;
+ }
+}
+
+static int do_hwtid_rpl(struct t3cdev *dev, struct sk_buff *skb)
+{
+ union opcode_tid *p = cplhdr(skb);
+ unsigned int hwtid = G_TID(ntohl(p->opcode_tid));
+ struct t3c_tid_entry *t3c_tid;
+
+ t3c_tid = lookup_tid(&(T3C_DATA(dev))->tid_maps, hwtid);
+ if (t3c_tid && t3c_tid->ctx && t3c_tid->client->handlers &&
+ t3c_tid->client->handlers[p->opcode]) {
+ return t3c_tid->client->handlers[p->opcode]
+ (dev, skb, t3c_tid->ctx);
+ } else {
+ pr_err("%s: received clientless CPL command 0x%x\n",
+ dev->name, p->opcode);
+ return CPL_RET_BUF_DONE | CPL_RET_BAD_MSG;
+ }
+}
+
+static int do_cr(struct t3cdev *dev, struct sk_buff *skb)
+{
+ struct cpl_pass_accept_req *req = cplhdr(skb);
+ unsigned int stid = G_PASS_OPEN_TID(ntohl(req->tos_tid));
+ struct tid_info *t = &(T3C_DATA(dev))->tid_maps;
+ struct t3c_tid_entry *t3c_tid;
+ unsigned int tid = GET_TID(req);
+
+ if (unlikely(tid >= t->ntids)) {
+ printk("%s: passive open TID %u too large\n",
+ dev->name, tid);
+ t3_fatal_err(tdev2adap(dev));
+ return CPL_RET_BUF_DONE;
+ }
+
+ t3c_tid = lookup_stid(t, stid);
+ if (t3c_tid && t3c_tid->ctx && t3c_tid->client->handlers &&
+ t3c_tid->client->handlers[CPL_PASS_ACCEPT_REQ]) {
+ return t3c_tid->client->handlers[CPL_PASS_ACCEPT_REQ]
+ (dev, skb, t3c_tid->ctx);
+ } else {
+ pr_err("%s: received clientless CPL command 0x%x\n",
+ dev->name, CPL_PASS_ACCEPT_REQ);
+ return CPL_RET_BUF_DONE | CPL_RET_BAD_MSG;
+ }
+}
+
+/*
+ * Returns an sk_buff for a reply CPL message of size len. If the input
+ * sk_buff has no other users it is trimmed and reused, otherwise a new buffer
+ * is allocated. The input skb must be of size at least len. Note that this
+ * operation does not destroy the original skb data even if it decides to reuse
+ * the buffer.
+ */
+static struct sk_buff *cxgb3_get_cpl_reply_skb(struct sk_buff *skb, size_t len,
+ gfp_t gfp)
+{
+ if (likely(!skb_cloned(skb))) {
+ BUG_ON(skb->len < len);
+ __skb_trim(skb, len);
+ skb_get(skb);
+ } else {
+ skb = alloc_skb(len, gfp);
+ if (skb)
+ __skb_put(skb, len);
+ }
+ return skb;
+}
+
+static int do_abort_req_rss(struct t3cdev *dev, struct sk_buff *skb)
+{
+ union opcode_tid *p = cplhdr(skb);
+ unsigned int hwtid = G_TID(ntohl(p->opcode_tid));
+ struct t3c_tid_entry *t3c_tid;
+
+ t3c_tid = lookup_tid(&(T3C_DATA(dev))->tid_maps, hwtid);
+ if (t3c_tid && t3c_tid->ctx && t3c_tid->client->handlers &&
+ t3c_tid->client->handlers[p->opcode]) {
+ return t3c_tid->client->handlers[p->opcode]
+ (dev, skb, t3c_tid->ctx);
+ } else {
+ struct cpl_abort_req_rss *req = cplhdr(skb);
+ struct cpl_abort_rpl *rpl;
+ struct sk_buff *reply_skb;
+ unsigned int tid = GET_TID(req);
+ u8 cmd = req->status;
+
+ if (req->status == CPL_ERR_RTX_NEG_ADVICE ||
+ req->status == CPL_ERR_PERSIST_NEG_ADVICE)
+ goto out;
+
+ reply_skb = cxgb3_get_cpl_reply_skb(skb,
+ sizeof(struct
+ cpl_abort_rpl),
+ GFP_ATOMIC);
+
+ if (!reply_skb) {
+ printk("do_abort_req_rss: couldn't get skb!\n");
+ goto out;
+ }
+ reply_skb->priority = CPL_PRIORITY_DATA;
+ __skb_put(reply_skb, sizeof(struct cpl_abort_rpl));
+ rpl = cplhdr(reply_skb);
+ rpl->wr.wr_hi =
+ htonl(V_WR_OP(FW_WROPCODE_OFLD_HOST_ABORT_CON_RPL));
+ rpl->wr.wr_lo = htonl(V_WR_TID(tid));
+ OPCODE_TID(rpl) = htonl(MK_OPCODE_TID(CPL_ABORT_RPL, tid));
+ rpl->cmd = cmd;
+ cxgb3_ofld_send(dev, reply_skb);
+out:
+ return CPL_RET_BUF_DONE;
+ }
+}
+
+static int do_act_establish(struct t3cdev *dev, struct sk_buff *skb)
+{
+ struct cpl_act_establish *req = cplhdr(skb);
+ unsigned int atid = G_PASS_OPEN_TID(ntohl(req->tos_tid));
+ struct tid_info *t = &(T3C_DATA(dev))->tid_maps;
+ struct t3c_tid_entry *t3c_tid;
+ unsigned int tid = GET_TID(req);
+
+ if (unlikely(tid >= t->ntids)) {
+ printk("%s: active establish TID %u too large\n",
+ dev->name, tid);
+ t3_fatal_err(tdev2adap(dev));
+ return CPL_RET_BUF_DONE;
+ }
+
+ t3c_tid = lookup_atid(t, atid);
+ if (t3c_tid && t3c_tid->ctx && t3c_tid->client->handlers &&
+ t3c_tid->client->handlers[CPL_ACT_ESTABLISH]) {
+ return t3c_tid->client->handlers[CPL_ACT_ESTABLISH]
+ (dev, skb, t3c_tid->ctx);
+ } else {
+ pr_err("%s: received clientless CPL command 0x%x\n",
+ dev->name, CPL_ACT_ESTABLISH);
+ return CPL_RET_BUF_DONE | CPL_RET_BAD_MSG;
+ }
+}
+
+static int do_trace(struct t3cdev *dev, struct sk_buff *skb)
+{
+ struct cpl_trace_pkt *p = cplhdr(skb);
+
+ skb->protocol = htons(0xffff);
+ skb->dev = dev->lldev;
+ skb_pull(skb, sizeof(*p));
+ skb_reset_mac_header(skb);
+ netif_receive_skb(skb);
+ return 0;
+}
+
+/*
+ * That skb would better have come from process_responses() where we abuse
+ * ->priority and ->csum to carry our data. NB: if we get to per-arch
+ * ->csum, the things might get really interesting here.
+ */
+
+static inline u32 get_hwtid(struct sk_buff *skb)
+{
+ return ntohl((__force __be32)skb->priority) >> 8 & 0xfffff;
+}
+
+static inline u32 get_opcode(struct sk_buff *skb)
+{
+ return G_OPCODE(ntohl((__force __be32)skb->csum));
+}
+
+static int do_term(struct t3cdev *dev, struct sk_buff *skb)
+{
+ unsigned int hwtid = get_hwtid(skb);
+ unsigned int opcode = get_opcode(skb);
+ struct t3c_tid_entry *t3c_tid;
+
+ t3c_tid = lookup_tid(&(T3C_DATA(dev))->tid_maps, hwtid);
+ if (t3c_tid && t3c_tid->ctx && t3c_tid->client->handlers &&
+ t3c_tid->client->handlers[opcode]) {
+ return t3c_tid->client->handlers[opcode] (dev, skb,
+ t3c_tid->ctx);
+ } else {
+ pr_err("%s: received clientless CPL command 0x%x\n",
+ dev->name, opcode);
+ return CPL_RET_BUF_DONE | CPL_RET_BAD_MSG;
+ }
+}
+
+static int nb_callback(struct notifier_block *self, unsigned long event,
+ void *ctx)
+{
+ switch (event) {
+ case (NETEVENT_NEIGH_UPDATE):{
+ cxgb_neigh_update((struct neighbour *)ctx);
+ break;
+ }
+ case (NETEVENT_REDIRECT):{
+ struct netevent_redirect *nr = ctx;
+ cxgb_redirect(nr->old, nr->new, nr->neigh,
+ nr->daddr);
+ cxgb_neigh_update(nr->neigh);
+ break;
+ }
+ default:
+ break;
+ }
+ return 0;
+}
+
+static struct notifier_block nb = {
+ .notifier_call = nb_callback
+};
+
+/*
+ * Process a received packet with an unknown/unexpected CPL opcode.
+ */
+static int do_bad_cpl(struct t3cdev *dev, struct sk_buff *skb)
+{
+ pr_err("%s: received bad CPL command 0x%x\n", dev->name, *skb->data);
+ return CPL_RET_BUF_DONE | CPL_RET_BAD_MSG;
+}
+
+/*
+ * Handlers for each CPL opcode
+ */
+static cpl_handler_func cpl_handlers[NUM_CPL_CMDS];
+
+/*
+ * Add a new handler to the CPL dispatch table. A NULL handler may be supplied
+ * to unregister an existing handler.
+ */
+void t3_register_cpl_handler(unsigned int opcode, cpl_handler_func h)
+{
+ if (opcode < NUM_CPL_CMDS)
+ cpl_handlers[opcode] = h ? h : do_bad_cpl;
+ else
+ pr_err("T3C: handler registration for opcode %x failed\n",
+ opcode);
+}
+
+EXPORT_SYMBOL(t3_register_cpl_handler);
+
+/*
+ * T3CDEV's receive method.
+ */
+static int process_rx(struct t3cdev *dev, struct sk_buff **skbs, int n)
+{
+ while (n--) {
+ struct sk_buff *skb = *skbs++;
+ unsigned int opcode = get_opcode(skb);
+ int ret = cpl_handlers[opcode] (dev, skb);
+
+#if VALIDATE_TID
+ if (ret & CPL_RET_UNKNOWN_TID) {
+ union opcode_tid *p = cplhdr(skb);
+
+ pr_err("%s: CPL message (opcode %u) had unknown TID %u\n",
+ dev->name, opcode, G_TID(ntohl(p->opcode_tid)));
+ }
+#endif
+ if (ret & CPL_RET_BUF_DONE)
+ kfree_skb(skb);
+ }
+ return 0;
+}
+
+/*
+ * Sends an sk_buff to a T3C driver after dealing with any active network taps.
+ */
+int cxgb3_ofld_send(struct t3cdev *dev, struct sk_buff *skb)
+{
+ int r;
+
+ local_bh_disable();
+ r = dev->send(dev, skb);
+ local_bh_enable();
+ return r;
+}
+
+EXPORT_SYMBOL(cxgb3_ofld_send);
+
+static int is_offloading(struct net_device *dev)
+{
+ struct adapter *adapter;
+ int i;
+
+ read_lock_bh(&adapter_list_lock);
+ list_for_each_entry(adapter, &adapter_list, adapter_list) {
+ for_each_port(adapter, i) {
+ if (dev == adapter->port[i]) {
+ read_unlock_bh(&adapter_list_lock);
+ return 1;
+ }
+ }
+ }
+ read_unlock_bh(&adapter_list_lock);
+ return 0;
+}
+
+static void cxgb_neigh_update(struct neighbour *neigh)
+{
+ struct net_device *dev;
+
+ if (!neigh)
+ return;
+ dev = neigh->dev;
+ if (dev && (is_offloading(dev))) {
+ struct t3cdev *tdev = dev2t3cdev(dev);
+
+ BUG_ON(!tdev);
+ t3_l2t_update(tdev, neigh);
+ }
+}
+
+static void set_l2t_ix(struct t3cdev *tdev, u32 tid, struct l2t_entry *e)
+{
+ struct sk_buff *skb;
+ struct cpl_set_tcb_field *req;
+
+ skb = alloc_skb(sizeof(*req), GFP_ATOMIC);
+ if (!skb) {
+ pr_err("%s: cannot allocate skb!\n", __func__);
+ return;
+ }
+ skb->priority = CPL_PRIORITY_CONTROL;
+ req = (struct cpl_set_tcb_field *)skb_put(skb, sizeof(*req));
+ req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD));
+ OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, tid));
+ req->reply = 0;
+ req->cpu_idx = 0;
+ req->word = htons(W_TCB_L2T_IX);
+ req->mask = cpu_to_be64(V_TCB_L2T_IX(M_TCB_L2T_IX));
+ req->val = cpu_to_be64(V_TCB_L2T_IX(e->idx));
+ tdev->send(tdev, skb);
+}
+
+static void cxgb_redirect(struct dst_entry *old, struct dst_entry *new,
+ struct neighbour *neigh,
+ const void *daddr)
+{
+ struct net_device *dev;
+ struct tid_info *ti;
+ struct t3cdev *tdev;
+ u32 tid;
+ int update_tcb;
+ struct l2t_entry *e;
+ struct t3c_tid_entry *te;
+
+ dev = neigh->dev;
+
+ if (!is_offloading(dev))
+ return;
+ tdev = dev2t3cdev(dev);
+ BUG_ON(!tdev);
+
+ /* Add new L2T entry */
+ e = t3_l2t_get(tdev, new, dev, daddr);
+ if (!e) {
+ pr_err("%s: couldn't allocate new l2t entry!\n", __func__);
+ return;
+ }
+
+ /* Walk tid table and notify clients of dst change. */
+ ti = &(T3C_DATA(tdev))->tid_maps;
+ for (tid = 0; tid < ti->ntids; tid++) {
+ te = lookup_tid(ti, tid);
+ BUG_ON(!te);
+ if (te && te->ctx && te->client && te->client->redirect) {
+ update_tcb = te->client->redirect(te->ctx, old, new, e);
+ if (update_tcb) {
+ rcu_read_lock();
+ l2t_hold(L2DATA(tdev), e);
+ rcu_read_unlock();
+ set_l2t_ix(tdev, tid, e);
+ }
+ }
+ }
+ l2t_release(tdev, e);
+}
+
+/*
+ * Allocate a chunk of memory using kmalloc or, if that fails, vmalloc.
+ * The allocated memory is cleared.
+ */
+void *cxgb_alloc_mem(unsigned long size)
+{
+ void *p = kzalloc(size, GFP_KERNEL | __GFP_NOWARN);
+
+ if (!p)
+ p = vzalloc(size);
+ return p;
+}
+
+/*
+ * Free memory allocated through t3_alloc_mem().
+ */
+void cxgb_free_mem(void *addr)
+{
+ if (is_vmalloc_addr(addr))
+ vfree(addr);
+ else
+ kfree(addr);
+}
+
+/*
+ * Allocate and initialize the TID tables. Returns 0 on success.
+ */
+static int init_tid_tabs(struct tid_info *t, unsigned int ntids,
+ unsigned int natids, unsigned int nstids,
+ unsigned int atid_base, unsigned int stid_base)
+{
+ unsigned long size = ntids * sizeof(*t->tid_tab) +
+ natids * sizeof(*t->atid_tab) + nstids * sizeof(*t->stid_tab);
+
+ t->tid_tab = cxgb_alloc_mem(size);
+ if (!t->tid_tab)
+ return -ENOMEM;
+
+ t->stid_tab = (union listen_entry *)&t->tid_tab[ntids];
+ t->atid_tab = (union active_open_entry *)&t->stid_tab[nstids];
+ t->ntids = ntids;
+ t->nstids = nstids;
+ t->stid_base = stid_base;
+ t->sfree = NULL;
+ t->natids = natids;
+ t->atid_base = atid_base;
+ t->afree = NULL;
+ t->stids_in_use = t->atids_in_use = 0;
+ atomic_set(&t->tids_in_use, 0);
+ spin_lock_init(&t->stid_lock);
+ spin_lock_init(&t->atid_lock);
+
+ /*
+ * Setup the free lists for stid_tab and atid_tab.
+ */
+ if (nstids) {
+ while (--nstids)
+ t->stid_tab[nstids - 1].next = &t->stid_tab[nstids];
+ t->sfree = t->stid_tab;
+ }
+ if (natids) {
+ while (--natids)
+ t->atid_tab[natids - 1].next = &t->atid_tab[natids];
+ t->afree = t->atid_tab;
+ }
+ return 0;
+}
+
+static void free_tid_maps(struct tid_info *t)
+{
+ cxgb_free_mem(t->tid_tab);
+}
+
+static inline void add_adapter(struct adapter *adap)
+{
+ write_lock_bh(&adapter_list_lock);
+ list_add_tail(&adap->adapter_list, &adapter_list);
+ write_unlock_bh(&adapter_list_lock);
+}
+
+static inline void remove_adapter(struct adapter *adap)
+{
+ write_lock_bh(&adapter_list_lock);
+ list_del(&adap->adapter_list);
+ write_unlock_bh(&adapter_list_lock);
+}
+
+int cxgb3_offload_activate(struct adapter *adapter)
+{
+ struct t3cdev *dev = &adapter->tdev;
+ int natids, err;
+ struct t3c_data *t;
+ struct tid_range stid_range, tid_range;
+ struct mtutab mtutab;
+ unsigned int l2t_capacity;
+ struct l2t_data *l2td;
+
+ t = kzalloc(sizeof(*t), GFP_KERNEL);
+ if (!t)
+ return -ENOMEM;
+
+ err = -EOPNOTSUPP;
+ if (dev->ctl(dev, GET_TX_MAX_CHUNK, &t->tx_max_chunk) < 0 ||
+ dev->ctl(dev, GET_MAX_OUTSTANDING_WR, &t->max_wrs) < 0 ||
+ dev->ctl(dev, GET_L2T_CAPACITY, &l2t_capacity) < 0 ||
+ dev->ctl(dev, GET_MTUS, &mtutab) < 0 ||
+ dev->ctl(dev, GET_TID_RANGE, &tid_range) < 0 ||
+ dev->ctl(dev, GET_STID_RANGE, &stid_range) < 0)
+ goto out_free;
+
+ err = -ENOMEM;
+ l2td = t3_init_l2t(l2t_capacity);
+ if (!l2td)
+ goto out_free;
+
+ natids = min(tid_range.num / 2, MAX_ATIDS);
+ err = init_tid_tabs(&t->tid_maps, tid_range.num, natids,
+ stid_range.num, ATID_BASE, stid_range.base);
+ if (err)
+ goto out_free_l2t;
+
+ t->mtus = mtutab.mtus;
+ t->nmtus = mtutab.size;
+
+ INIT_WORK(&t->tid_release_task, t3_process_tid_release_list);
+ spin_lock_init(&t->tid_release_lock);
+ INIT_LIST_HEAD(&t->list_node);
+ t->dev = dev;
+
+ RCU_INIT_POINTER(dev->l2opt, l2td);
+ T3C_DATA(dev) = t;
+ dev->recv = process_rx;
+ dev->neigh_update = t3_l2t_update;
+
+ /* Register netevent handler once */
+ if (list_empty(&adapter_list))
+ register_netevent_notifier(&nb);
+
+ t->nofail_skb = alloc_skb(sizeof(struct cpl_tid_release), GFP_KERNEL);
+ t->release_list_incomplete = 0;
+
+ add_adapter(adapter);
+ return 0;
+
+out_free_l2t:
+ t3_free_l2t(l2td);
+out_free:
+ kfree(t);
+ return err;
+}
+
+static void clean_l2_data(struct rcu_head *head)
+{
+ struct l2t_data *d = container_of(head, struct l2t_data, rcu_head);
+ t3_free_l2t(d);
+}
+
+
+void cxgb3_offload_deactivate(struct adapter *adapter)
+{
+ struct t3cdev *tdev = &adapter->tdev;
+ struct t3c_data *t = T3C_DATA(tdev);
+ struct l2t_data *d;
+
+ remove_adapter(adapter);
+ if (list_empty(&adapter_list))
+ unregister_netevent_notifier(&nb);
+
+ free_tid_maps(&t->tid_maps);
+ T3C_DATA(tdev) = NULL;
+ rcu_read_lock();
+ d = L2DATA(tdev);
+ rcu_read_unlock();
+ RCU_INIT_POINTER(tdev->l2opt, NULL);
+ call_rcu(&d->rcu_head, clean_l2_data);
+ if (t->nofail_skb)
+ kfree_skb(t->nofail_skb);
+ kfree(t);
+}
+
+static inline void register_tdev(struct t3cdev *tdev)
+{
+ static int unit;
+
+ mutex_lock(&cxgb3_db_lock);
+ snprintf(tdev->name, sizeof(tdev->name), "ofld_dev%d", unit++);
+ list_add_tail(&tdev->ofld_dev_list, &ofld_dev_list);
+ mutex_unlock(&cxgb3_db_lock);
+}
+
+static inline void unregister_tdev(struct t3cdev *tdev)
+{
+ mutex_lock(&cxgb3_db_lock);
+ list_del(&tdev->ofld_dev_list);
+ mutex_unlock(&cxgb3_db_lock);
+}
+
+static inline int adap2type(struct adapter *adapter)
+{
+ int type = 0;
+
+ switch (adapter->params.rev) {
+ case T3_REV_A:
+ type = T3A;
+ break;
+ case T3_REV_B:
+ case T3_REV_B2:
+ type = T3B;
+ break;
+ case T3_REV_C:
+ type = T3C;
+ break;
+ }
+ return type;
+}
+
+void cxgb3_adapter_ofld(struct adapter *adapter)
+{
+ struct t3cdev *tdev = &adapter->tdev;
+
+ INIT_LIST_HEAD(&tdev->ofld_dev_list);
+
+ cxgb3_set_dummy_ops(tdev);
+ tdev->send = t3_offload_tx;
+ tdev->ctl = cxgb_offload_ctl;
+ tdev->type = adap2type(adapter);
+
+ register_tdev(tdev);
+}
+
+void cxgb3_adapter_unofld(struct adapter *adapter)
+{
+ struct t3cdev *tdev = &adapter->tdev;
+
+ tdev->recv = NULL;
+ tdev->neigh_update = NULL;
+
+ unregister_tdev(tdev);
+}
+
+void __init cxgb3_offload_init(void)
+{
+ int i;
+
+ for (i = 0; i < NUM_CPL_CMDS; ++i)
+ cpl_handlers[i] = do_bad_cpl;
+
+ t3_register_cpl_handler(CPL_SMT_WRITE_RPL, do_smt_write_rpl);
+ t3_register_cpl_handler(CPL_L2T_WRITE_RPL, do_l2t_write_rpl);
+ t3_register_cpl_handler(CPL_RTE_WRITE_RPL, do_rte_write_rpl);
+ t3_register_cpl_handler(CPL_PASS_OPEN_RPL, do_stid_rpl);
+ t3_register_cpl_handler(CPL_CLOSE_LISTSRV_RPL, do_stid_rpl);
+ t3_register_cpl_handler(CPL_PASS_ACCEPT_REQ, do_cr);
+ t3_register_cpl_handler(CPL_PASS_ESTABLISH, do_hwtid_rpl);
+ t3_register_cpl_handler(CPL_ABORT_RPL_RSS, do_hwtid_rpl);
+ t3_register_cpl_handler(CPL_ABORT_RPL, do_hwtid_rpl);
+ t3_register_cpl_handler(CPL_RX_URG_NOTIFY, do_hwtid_rpl);
+ t3_register_cpl_handler(CPL_RX_DATA, do_hwtid_rpl);
+ t3_register_cpl_handler(CPL_TX_DATA_ACK, do_hwtid_rpl);
+ t3_register_cpl_handler(CPL_TX_DMA_ACK, do_hwtid_rpl);
+ t3_register_cpl_handler(CPL_ACT_OPEN_RPL, do_act_open_rpl);
+ t3_register_cpl_handler(CPL_PEER_CLOSE, do_hwtid_rpl);
+ t3_register_cpl_handler(CPL_CLOSE_CON_RPL, do_hwtid_rpl);
+ t3_register_cpl_handler(CPL_ABORT_REQ_RSS, do_abort_req_rss);
+ t3_register_cpl_handler(CPL_ACT_ESTABLISH, do_act_establish);
+ t3_register_cpl_handler(CPL_SET_TCB_RPL, do_hwtid_rpl);
+ t3_register_cpl_handler(CPL_GET_TCB_RPL, do_hwtid_rpl);
+ t3_register_cpl_handler(CPL_RDMA_TERMINATE, do_term);
+ t3_register_cpl_handler(CPL_RDMA_EC_STATUS, do_hwtid_rpl);
+ t3_register_cpl_handler(CPL_TRACE_PKT, do_trace);
+ t3_register_cpl_handler(CPL_RX_DATA_DDP, do_hwtid_rpl);
+ t3_register_cpl_handler(CPL_RX_DDP_COMPLETE, do_hwtid_rpl);
+ t3_register_cpl_handler(CPL_ISCSI_HDR, do_hwtid_rpl);
+}
Code Review / kvmfornfv.git / blobdiff