2 * Copyright (c) 2006-2008 Chelsio, Inc. All rights reserved.
4 * This software is available to you under a choice of one of two
5 * licenses. You may choose to be licensed under the terms of the GNU
6 * General Public License (GPL) Version 2, available from the file
7 * COPYING in the main directory of this source tree, or the
8 * OpenIB.org BSD license below:
10 * Redistribution and use in source and binary forms, with or
11 * without modification, are permitted provided that the following
14 * - Redistributions of source code must retain the above
15 * copyright notice, this list of conditions and the following
18 * - Redistributions in binary form must reproduce the above
19 * copyright notice, this list of conditions and the following
20 * disclaimer in the documentation and/or other materials
21 * provided with the distribution.
23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
24 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
33 #include <linux/list.h>
34 #include <linux/slab.h>
35 #include <net/neighbour.h>
36 #include <linux/notifier.h>
37 #include <asm/atomic.h>
38 #include <linux/proc_fs.h>
39 #include <linux/if_vlan.h>
40 #include <net/netevent.h>
41 #include <linux/highmem.h>
42 #include <linux/vmalloc.h>
46 #include "cxgb3_ioctl.h"
47 #include "cxgb3_ctl_defs.h"
48 #include "cxgb3_defs.h"
50 #include "firmware_exports.h"
51 #include "cxgb3_offload.h"
53 static LIST_HEAD(client_list);
54 static LIST_HEAD(ofld_dev_list);
55 static DEFINE_MUTEX(cxgb3_db_lock);
57 static DEFINE_RWLOCK(adapter_list_lock);
58 static LIST_HEAD(adapter_list);
60 static const unsigned int MAX_ATIDS = 64 * 1024;
61 static const unsigned int ATID_BASE = 0x10000;
63 static void cxgb_neigh_update(struct neighbour *neigh);
64 static void cxgb_redirect(struct dst_entry *old, struct dst_entry *new);
66 static inline int offload_activated(struct t3cdev *tdev)
68 const struct adapter *adapter = tdev2adap(tdev);
70 return test_bit(OFFLOAD_DEVMAP_BIT, &adapter->open_device_map);
74 * cxgb3_register_client - register an offload client
77 * Add the client to the client list,
78 * and call backs the client for each activated offload device
80 void cxgb3_register_client(struct cxgb3_client *client)
84 mutex_lock(&cxgb3_db_lock);
85 list_add_tail(&client->client_list, &client_list);
88 list_for_each_entry(tdev, &ofld_dev_list, ofld_dev_list) {
89 if (offload_activated(tdev))
93 mutex_unlock(&cxgb3_db_lock);
96 EXPORT_SYMBOL(cxgb3_register_client);
99 * cxgb3_unregister_client - unregister an offload client
100 * @client: the client
102 * Remove the client to the client list,
103 * and call backs the client for each activated offload device.
105 void cxgb3_unregister_client(struct cxgb3_client *client)
109 mutex_lock(&cxgb3_db_lock);
110 list_del(&client->client_list);
112 if (client->remove) {
113 list_for_each_entry(tdev, &ofld_dev_list, ofld_dev_list) {
114 if (offload_activated(tdev))
115 client->remove(tdev);
118 mutex_unlock(&cxgb3_db_lock);
121 EXPORT_SYMBOL(cxgb3_unregister_client);
124 * cxgb3_add_clients - activate registered clients for an offload device
125 * @tdev: the offload device
127 * Call backs all registered clients once a offload device is activated
129 void cxgb3_add_clients(struct t3cdev *tdev)
131 struct cxgb3_client *client;
133 mutex_lock(&cxgb3_db_lock);
134 list_for_each_entry(client, &client_list, client_list) {
138 mutex_unlock(&cxgb3_db_lock);
142 * cxgb3_remove_clients - deactivates registered clients
143 * for an offload device
144 * @tdev: the offload device
146 * Call backs all registered clients once a offload device is deactivated
148 void cxgb3_remove_clients(struct t3cdev *tdev)
150 struct cxgb3_client *client;
152 mutex_lock(&cxgb3_db_lock);
153 list_for_each_entry(client, &client_list, client_list) {
155 client->remove(tdev);
157 mutex_unlock(&cxgb3_db_lock);
160 void cxgb3_event_notify(struct t3cdev *tdev, u32 event, u32 port)
162 struct cxgb3_client *client;
164 mutex_lock(&cxgb3_db_lock);
165 list_for_each_entry(client, &client_list, client_list) {
166 if (client->event_handler)
167 client->event_handler(tdev, event, port);
169 mutex_unlock(&cxgb3_db_lock);
172 static struct net_device *get_iff_from_mac(struct adapter *adapter,
173 const unsigned char *mac,
178 for_each_port(adapter, i) {
179 struct vlan_group *grp;
180 struct net_device *dev = adapter->port[i];
181 const struct port_info *p = netdev_priv(dev);
183 if (!memcmp(dev->dev_addr, mac, ETH_ALEN)) {
184 if (vlan && vlan != VLAN_VID_MASK) {
188 dev = vlan_group_get_device(grp, vlan);
198 static int cxgb_ulp_iscsi_ctl(struct adapter *adapter, unsigned int req,
203 unsigned int val = 0;
204 struct ulp_iscsi_info *uiip = data;
207 case ULP_ISCSI_GET_PARAMS:
208 uiip->pdev = adapter->pdev;
209 uiip->llimit = t3_read_reg(adapter, A_ULPRX_ISCSI_LLIMIT);
210 uiip->ulimit = t3_read_reg(adapter, A_ULPRX_ISCSI_ULIMIT);
211 uiip->tagmask = t3_read_reg(adapter, A_ULPRX_ISCSI_TAGMASK);
213 val = t3_read_reg(adapter, A_ULPRX_ISCSI_PSZ);
214 for (i = 0; i < 4; i++, val >>= 8)
215 uiip->pgsz_factor[i] = val & 0xFF;
217 val = t3_read_reg(adapter, A_TP_PARA_REG7);
219 uiip->max_rxsz = min((val >> S_PMMAXXFERLEN0)&M_PMMAXXFERLEN0,
220 (val >> S_PMMAXXFERLEN1)&M_PMMAXXFERLEN1);
222 * On tx, the iscsi pdu has to be <= tx page size and has to
223 * fit into the Tx PM FIFO.
225 val = min(adapter->params.tp.tx_pg_size,
226 t3_read_reg(adapter, A_PM1_TX_CFG) >> 17);
227 uiip->max_txsz = min(val, uiip->max_txsz);
229 /* set MaxRxData to 16224 */
230 val = t3_read_reg(adapter, A_TP_PARA_REG2);
231 if ((val >> S_MAXRXDATA) != 0x3f60) {
232 val &= (M_RXCOALESCESIZE << S_RXCOALESCESIZE);
233 val |= V_MAXRXDATA(0x3f60);
235 "%s, iscsi set MaxRxData to 16224 (0x%x).\n",
237 t3_write_reg(adapter, A_TP_PARA_REG2, val);
241 * on rx, the iscsi pdu has to be < rx page size and the
242 * the max rx data length programmed in TP
244 val = min(adapter->params.tp.rx_pg_size,
245 ((t3_read_reg(adapter, A_TP_PARA_REG2)) >>
246 S_MAXRXDATA) & M_MAXRXDATA);
247 uiip->max_rxsz = min(val, uiip->max_rxsz);
249 case ULP_ISCSI_SET_PARAMS:
250 t3_write_reg(adapter, A_ULPRX_ISCSI_TAGMASK, uiip->tagmask);
251 /* program the ddp page sizes */
252 for (i = 0; i < 4; i++)
253 val |= (uiip->pgsz_factor[i] & 0xF) << (8 * i);
254 if (val && (val != t3_read_reg(adapter, A_ULPRX_ISCSI_PSZ))) {
256 "%s, setting iscsi pgsz 0x%x, %u,%u,%u,%u.\n",
257 adapter->name, val, uiip->pgsz_factor[0],
258 uiip->pgsz_factor[1], uiip->pgsz_factor[2],
259 uiip->pgsz_factor[3]);
260 t3_write_reg(adapter, A_ULPRX_ISCSI_PSZ, val);
269 /* Response queue used for RDMA events. */
270 #define ASYNC_NOTIF_RSPQ 0
272 static int cxgb_rdma_ctl(struct adapter *adapter, unsigned int req, void *data)
277 case RDMA_GET_PARAMS: {
278 struct rdma_info *rdma = data;
279 struct pci_dev *pdev = adapter->pdev;
281 rdma->udbell_physbase = pci_resource_start(pdev, 2);
282 rdma->udbell_len = pci_resource_len(pdev, 2);
284 t3_read_reg(adapter, A_ULPTX_TPT_LLIMIT);
285 rdma->tpt_top = t3_read_reg(adapter, A_ULPTX_TPT_ULIMIT);
287 t3_read_reg(adapter, A_ULPTX_PBL_LLIMIT);
288 rdma->pbl_top = t3_read_reg(adapter, A_ULPTX_PBL_ULIMIT);
289 rdma->rqt_base = t3_read_reg(adapter, A_ULPRX_RQ_LLIMIT);
290 rdma->rqt_top = t3_read_reg(adapter, A_ULPRX_RQ_ULIMIT);
291 rdma->kdb_addr = adapter->regs + A_SG_KDOORBELL;
297 struct rdma_cq_op *rdma = data;
299 /* may be called in any context */
300 spin_lock_irqsave(&adapter->sge.reg_lock, flags);
301 ret = t3_sge_cqcntxt_op(adapter, rdma->id, rdma->op,
303 spin_unlock_irqrestore(&adapter->sge.reg_lock, flags);
307 struct ch_mem_range *t = data;
310 if ((t->addr & 7) || (t->len & 7))
312 if (t->mem_id == MEM_CM)
314 else if (t->mem_id == MEM_PMRX)
315 mem = &adapter->pmrx;
316 else if (t->mem_id == MEM_PMTX)
317 mem = &adapter->pmtx;
322 t3_mc7_bd_read(mem, t->addr / 8, t->len / 8,
329 struct rdma_cq_setup *rdma = data;
331 spin_lock_irq(&adapter->sge.reg_lock);
333 t3_sge_init_cqcntxt(adapter, rdma->id,
334 rdma->base_addr, rdma->size,
336 rdma->ovfl_mode, rdma->credits,
338 spin_unlock_irq(&adapter->sge.reg_lock);
341 case RDMA_CQ_DISABLE:
342 spin_lock_irq(&adapter->sge.reg_lock);
343 ret = t3_sge_disable_cqcntxt(adapter, *(unsigned int *)data);
344 spin_unlock_irq(&adapter->sge.reg_lock);
346 case RDMA_CTRL_QP_SETUP:{
347 struct rdma_ctrlqp_setup *rdma = data;
349 spin_lock_irq(&adapter->sge.reg_lock);
350 ret = t3_sge_init_ecntxt(adapter, FW_RI_SGEEC_START, 0,
353 rdma->base_addr, rdma->size,
354 FW_RI_TID_START, 1, 0);
355 spin_unlock_irq(&adapter->sge.reg_lock);
359 spin_lock(&adapter->stats_lock);
360 t3_tp_get_mib_stats(adapter, (struct tp_mib_stats *)data);
361 spin_unlock(&adapter->stats_lock);
370 static int cxgb_offload_ctl(struct t3cdev *tdev, unsigned int req, void *data)
372 struct adapter *adapter = tdev2adap(tdev);
373 struct tid_range *tid;
375 struct iff_mac *iffmacp;
376 struct ddp_params *ddpp;
377 struct adap_ports *ports;
378 struct ofld_page_info *rx_page_info;
379 struct tp_params *tp = &adapter->params.tp;
383 case GET_MAX_OUTSTANDING_WR:
384 *(unsigned int *)data = FW_WR_NUM;
387 *(unsigned int *)data = WR_FLITS;
389 case GET_TX_MAX_CHUNK:
390 *(unsigned int *)data = 1 << 20; /* 1MB */
394 tid->num = t3_mc5_size(&adapter->mc5) -
395 adapter->params.mc5.nroutes -
396 adapter->params.mc5.nfilters - adapter->params.mc5.nservers;
401 tid->num = adapter->params.mc5.nservers;
402 tid->base = t3_mc5_size(&adapter->mc5) - tid->num -
403 adapter->params.mc5.nfilters - adapter->params.mc5.nroutes;
405 case GET_L2T_CAPACITY:
406 *(unsigned int *)data = 2048;
411 mtup->mtus = adapter->params.mtus;
413 case GET_IFF_FROM_MAC:
415 iffmacp->dev = get_iff_from_mac(adapter, iffmacp->mac_addr,
421 ddpp->llimit = t3_read_reg(adapter, A_ULPRX_TDDP_LLIMIT);
422 ddpp->ulimit = t3_read_reg(adapter, A_ULPRX_TDDP_ULIMIT);
423 ddpp->tag_mask = t3_read_reg(adapter, A_ULPRX_TDDP_TAGMASK);
427 ports->nports = adapter->params.nports;
428 for_each_port(adapter, i)
429 ports->lldevs[i] = adapter->port[i];
431 case ULP_ISCSI_GET_PARAMS:
432 case ULP_ISCSI_SET_PARAMS:
433 if (!offload_running(adapter))
435 return cxgb_ulp_iscsi_ctl(adapter, req, data);
436 case RDMA_GET_PARAMS:
439 case RDMA_CQ_DISABLE:
440 case RDMA_CTRL_QP_SETUP:
443 if (!offload_running(adapter))
445 return cxgb_rdma_ctl(adapter, req, data);
446 case GET_RX_PAGE_INFO:
448 rx_page_info->page_size = tp->rx_pg_size;
449 rx_page_info->num = tp->rx_num_pgs;
451 case GET_ISCSI_IPV4ADDR: {
452 struct iscsi_ipv4addr *p = data;
453 struct port_info *pi = netdev_priv(p->dev);
454 p->ipv4addr = pi->iscsi_ipv4addr;
457 case GET_EMBEDDED_INFO: {
458 struct ch_embedded_info *e = data;
460 spin_lock(&adapter->stats_lock);
461 t3_get_fw_version(adapter, &e->fw_vers);
462 t3_get_tp_version(adapter, &e->tp_vers);
463 spin_unlock(&adapter->stats_lock);
473 * Dummy handler for Rx offload packets in case we get an offload packet before
474 * proper processing is setup. This complains and drops the packet as it isn't
475 * normal to get offload packets at this stage.
477 static int rx_offload_blackhole(struct t3cdev *dev, struct sk_buff **skbs,
481 dev_kfree_skb_any(skbs[n]);
485 static void dummy_neigh_update(struct t3cdev *dev, struct neighbour *neigh)
489 void cxgb3_set_dummy_ops(struct t3cdev *dev)
491 dev->recv = rx_offload_blackhole;
492 dev->neigh_update = dummy_neigh_update;
496 * Free an active-open TID.
498 void *cxgb3_free_atid(struct t3cdev *tdev, int atid)
500 struct tid_info *t = &(T3C_DATA(tdev))->tid_maps;
501 union active_open_entry *p = atid2entry(t, atid);
502 void *ctx = p->t3c_tid.ctx;
504 spin_lock_bh(&t->atid_lock);
508 spin_unlock_bh(&t->atid_lock);
513 EXPORT_SYMBOL(cxgb3_free_atid);
516 * Free a server TID and return it to the free pool.
518 void cxgb3_free_stid(struct t3cdev *tdev, int stid)
520 struct tid_info *t = &(T3C_DATA(tdev))->tid_maps;
521 union listen_entry *p = stid2entry(t, stid);
523 spin_lock_bh(&t->stid_lock);
527 spin_unlock_bh(&t->stid_lock);
530 EXPORT_SYMBOL(cxgb3_free_stid);
532 void cxgb3_insert_tid(struct t3cdev *tdev, struct cxgb3_client *client,
533 void *ctx, unsigned int tid)
535 struct tid_info *t = &(T3C_DATA(tdev))->tid_maps;
537 t->tid_tab[tid].client = client;
538 t->tid_tab[tid].ctx = ctx;
539 atomic_inc(&t->tids_in_use);
542 EXPORT_SYMBOL(cxgb3_insert_tid);
545 * Populate a TID_RELEASE WR. The skb must be already propely sized.
547 static inline void mk_tid_release(struct sk_buff *skb, unsigned int tid)
549 struct cpl_tid_release *req;
551 skb->priority = CPL_PRIORITY_SETUP;
552 req = (struct cpl_tid_release *)__skb_put(skb, sizeof(*req));
553 req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD));
554 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_TID_RELEASE, tid));
557 static void t3_process_tid_release_list(struct work_struct *work)
559 struct t3c_data *td = container_of(work, struct t3c_data,
562 struct t3cdev *tdev = td->dev;
565 spin_lock_bh(&td->tid_release_lock);
566 while (td->tid_release_list) {
567 struct t3c_tid_entry *p = td->tid_release_list;
569 td->tid_release_list = (struct t3c_tid_entry *)p->ctx;
570 spin_unlock_bh(&td->tid_release_lock);
572 skb = alloc_skb(sizeof(struct cpl_tid_release),
575 skb = td->nofail_skb;
577 spin_lock_bh(&td->tid_release_lock);
578 p->ctx = (void *)td->tid_release_list;
579 td->tid_release_list = (struct t3c_tid_entry *)p;
582 mk_tid_release(skb, p - td->tid_maps.tid_tab);
583 cxgb3_ofld_send(tdev, skb);
585 if (skb == td->nofail_skb)
587 alloc_skb(sizeof(struct cpl_tid_release),
589 spin_lock_bh(&td->tid_release_lock);
591 td->release_list_incomplete = (td->tid_release_list == NULL) ? 0 : 1;
592 spin_unlock_bh(&td->tid_release_lock);
596 alloc_skb(sizeof(struct cpl_tid_release),
600 /* use ctx as a next pointer in the tid release list */
601 void cxgb3_queue_tid_release(struct t3cdev *tdev, unsigned int tid)
603 struct t3c_data *td = T3C_DATA(tdev);
604 struct t3c_tid_entry *p = &td->tid_maps.tid_tab[tid];
606 spin_lock_bh(&td->tid_release_lock);
607 p->ctx = (void *)td->tid_release_list;
609 td->tid_release_list = p;
610 if (!p->ctx || td->release_list_incomplete)
611 schedule_work(&td->tid_release_task);
612 spin_unlock_bh(&td->tid_release_lock);
615 EXPORT_SYMBOL(cxgb3_queue_tid_release);
618 * Remove a tid from the TID table. A client may defer processing its last
619 * CPL message if it is locked at the time it arrives, and while the message
620 * sits in the client's backlog the TID may be reused for another connection.
621 * To handle this we atomically switch the TID association if it still points
622 * to the original client context.
624 void cxgb3_remove_tid(struct t3cdev *tdev, void *ctx, unsigned int tid)
626 struct tid_info *t = &(T3C_DATA(tdev))->tid_maps;
628 BUG_ON(tid >= t->ntids);
629 if (tdev->type == T3A)
630 (void)cmpxchg(&t->tid_tab[tid].ctx, ctx, NULL);
634 skb = alloc_skb(sizeof(struct cpl_tid_release), GFP_ATOMIC);
636 mk_tid_release(skb, tid);
637 cxgb3_ofld_send(tdev, skb);
638 t->tid_tab[tid].ctx = NULL;
640 cxgb3_queue_tid_release(tdev, tid);
642 atomic_dec(&t->tids_in_use);
645 EXPORT_SYMBOL(cxgb3_remove_tid);
647 int cxgb3_alloc_atid(struct t3cdev *tdev, struct cxgb3_client *client,
651 struct tid_info *t = &(T3C_DATA(tdev))->tid_maps;
653 spin_lock_bh(&t->atid_lock);
655 t->atids_in_use + atomic_read(&t->tids_in_use) + MC5_MIN_TIDS <=
657 union active_open_entry *p = t->afree;
659 atid = (p - t->atid_tab) + t->atid_base;
661 p->t3c_tid.ctx = ctx;
662 p->t3c_tid.client = client;
665 spin_unlock_bh(&t->atid_lock);
669 EXPORT_SYMBOL(cxgb3_alloc_atid);
671 int cxgb3_alloc_stid(struct t3cdev *tdev, struct cxgb3_client *client,
675 struct tid_info *t = &(T3C_DATA(tdev))->tid_maps;
677 spin_lock_bh(&t->stid_lock);
679 union listen_entry *p = t->sfree;
681 stid = (p - t->stid_tab) + t->stid_base;
683 p->t3c_tid.ctx = ctx;
684 p->t3c_tid.client = client;
687 spin_unlock_bh(&t->stid_lock);
691 EXPORT_SYMBOL(cxgb3_alloc_stid);
693 /* Get the t3cdev associated with a net_device */
694 struct t3cdev *dev2t3cdev(struct net_device *dev)
696 const struct port_info *pi = netdev_priv(dev);
698 return (struct t3cdev *)pi->adapter;
701 EXPORT_SYMBOL(dev2t3cdev);
703 static int do_smt_write_rpl(struct t3cdev *dev, struct sk_buff *skb)
705 struct cpl_smt_write_rpl *rpl = cplhdr(skb);
707 if (rpl->status != CPL_ERR_NONE)
709 "Unexpected SMT_WRITE_RPL status %u for entry %u\n",
710 rpl->status, GET_TID(rpl));
712 return CPL_RET_BUF_DONE;
715 static int do_l2t_write_rpl(struct t3cdev *dev, struct sk_buff *skb)
717 struct cpl_l2t_write_rpl *rpl = cplhdr(skb);
719 if (rpl->status != CPL_ERR_NONE)
721 "Unexpected L2T_WRITE_RPL status %u for entry %u\n",
722 rpl->status, GET_TID(rpl));
724 return CPL_RET_BUF_DONE;
727 static int do_rte_write_rpl(struct t3cdev *dev, struct sk_buff *skb)
729 struct cpl_rte_write_rpl *rpl = cplhdr(skb);
731 if (rpl->status != CPL_ERR_NONE)
733 "Unexpected RTE_WRITE_RPL status %u for entry %u\n",
734 rpl->status, GET_TID(rpl));
736 return CPL_RET_BUF_DONE;
739 static int do_act_open_rpl(struct t3cdev *dev, struct sk_buff *skb)
741 struct cpl_act_open_rpl *rpl = cplhdr(skb);
742 unsigned int atid = G_TID(ntohl(rpl->atid));
743 struct t3c_tid_entry *t3c_tid;
745 t3c_tid = lookup_atid(&(T3C_DATA(dev))->tid_maps, atid);
746 if (t3c_tid && t3c_tid->ctx && t3c_tid->client &&
747 t3c_tid->client->handlers &&
748 t3c_tid->client->handlers[CPL_ACT_OPEN_RPL]) {
749 return t3c_tid->client->handlers[CPL_ACT_OPEN_RPL] (dev, skb,
753 printk(KERN_ERR "%s: received clientless CPL command 0x%x\n",
754 dev->name, CPL_ACT_OPEN_RPL);
755 return CPL_RET_BUF_DONE | CPL_RET_BAD_MSG;
759 static int do_stid_rpl(struct t3cdev *dev, struct sk_buff *skb)
761 union opcode_tid *p = cplhdr(skb);
762 unsigned int stid = G_TID(ntohl(p->opcode_tid));
763 struct t3c_tid_entry *t3c_tid;
765 t3c_tid = lookup_stid(&(T3C_DATA(dev))->tid_maps, stid);
766 if (t3c_tid && t3c_tid->ctx && t3c_tid->client->handlers &&
767 t3c_tid->client->handlers[p->opcode]) {
768 return t3c_tid->client->handlers[p->opcode] (dev, skb,
771 printk(KERN_ERR "%s: received clientless CPL command 0x%x\n",
772 dev->name, p->opcode);
773 return CPL_RET_BUF_DONE | CPL_RET_BAD_MSG;
777 static int do_hwtid_rpl(struct t3cdev *dev, struct sk_buff *skb)
779 union opcode_tid *p = cplhdr(skb);
780 unsigned int hwtid = G_TID(ntohl(p->opcode_tid));
781 struct t3c_tid_entry *t3c_tid;
783 t3c_tid = lookup_tid(&(T3C_DATA(dev))->tid_maps, hwtid);
784 if (t3c_tid && t3c_tid->ctx && t3c_tid->client->handlers &&
785 t3c_tid->client->handlers[p->opcode]) {
786 return t3c_tid->client->handlers[p->opcode]
787 (dev, skb, t3c_tid->ctx);
789 printk(KERN_ERR "%s: received clientless CPL command 0x%x\n",
790 dev->name, p->opcode);
791 return CPL_RET_BUF_DONE | CPL_RET_BAD_MSG;
795 static int do_cr(struct t3cdev *dev, struct sk_buff *skb)
797 struct cpl_pass_accept_req *req = cplhdr(skb);
798 unsigned int stid = G_PASS_OPEN_TID(ntohl(req->tos_tid));
799 struct tid_info *t = &(T3C_DATA(dev))->tid_maps;
800 struct t3c_tid_entry *t3c_tid;
801 unsigned int tid = GET_TID(req);
803 if (unlikely(tid >= t->ntids)) {
804 printk("%s: passive open TID %u too large\n",
806 t3_fatal_err(tdev2adap(dev));
807 return CPL_RET_BUF_DONE;
810 t3c_tid = lookup_stid(t, stid);
811 if (t3c_tid && t3c_tid->ctx && t3c_tid->client->handlers &&
812 t3c_tid->client->handlers[CPL_PASS_ACCEPT_REQ]) {
813 return t3c_tid->client->handlers[CPL_PASS_ACCEPT_REQ]
814 (dev, skb, t3c_tid->ctx);
816 printk(KERN_ERR "%s: received clientless CPL command 0x%x\n",
817 dev->name, CPL_PASS_ACCEPT_REQ);
818 return CPL_RET_BUF_DONE | CPL_RET_BAD_MSG;
823 * Returns an sk_buff for a reply CPL message of size len. If the input
824 * sk_buff has no other users it is trimmed and reused, otherwise a new buffer
825 * is allocated. The input skb must be of size at least len. Note that this
826 * operation does not destroy the original skb data even if it decides to reuse
829 static struct sk_buff *cxgb3_get_cpl_reply_skb(struct sk_buff *skb, size_t len,
832 if (likely(!skb_cloned(skb))) {
833 BUG_ON(skb->len < len);
834 __skb_trim(skb, len);
837 skb = alloc_skb(len, gfp);
844 static int do_abort_req_rss(struct t3cdev *dev, struct sk_buff *skb)
846 union opcode_tid *p = cplhdr(skb);
847 unsigned int hwtid = G_TID(ntohl(p->opcode_tid));
848 struct t3c_tid_entry *t3c_tid;
850 t3c_tid = lookup_tid(&(T3C_DATA(dev))->tid_maps, hwtid);
851 if (t3c_tid && t3c_tid->ctx && t3c_tid->client->handlers &&
852 t3c_tid->client->handlers[p->opcode]) {
853 return t3c_tid->client->handlers[p->opcode]
854 (dev, skb, t3c_tid->ctx);
856 struct cpl_abort_req_rss *req = cplhdr(skb);
857 struct cpl_abort_rpl *rpl;
858 struct sk_buff *reply_skb;
859 unsigned int tid = GET_TID(req);
860 u8 cmd = req->status;
862 if (req->status == CPL_ERR_RTX_NEG_ADVICE ||
863 req->status == CPL_ERR_PERSIST_NEG_ADVICE)
866 reply_skb = cxgb3_get_cpl_reply_skb(skb,
872 printk("do_abort_req_rss: couldn't get skb!\n");
875 reply_skb->priority = CPL_PRIORITY_DATA;
876 __skb_put(reply_skb, sizeof(struct cpl_abort_rpl));
877 rpl = cplhdr(reply_skb);
879 htonl(V_WR_OP(FW_WROPCODE_OFLD_HOST_ABORT_CON_RPL));
880 rpl->wr.wr_lo = htonl(V_WR_TID(tid));
881 OPCODE_TID(rpl) = htonl(MK_OPCODE_TID(CPL_ABORT_RPL, tid));
883 cxgb3_ofld_send(dev, reply_skb);
885 return CPL_RET_BUF_DONE;
889 static int do_act_establish(struct t3cdev *dev, struct sk_buff *skb)
891 struct cpl_act_establish *req = cplhdr(skb);
892 unsigned int atid = G_PASS_OPEN_TID(ntohl(req->tos_tid));
893 struct tid_info *t = &(T3C_DATA(dev))->tid_maps;
894 struct t3c_tid_entry *t3c_tid;
895 unsigned int tid = GET_TID(req);
897 if (unlikely(tid >= t->ntids)) {
898 printk("%s: active establish TID %u too large\n",
900 t3_fatal_err(tdev2adap(dev));
901 return CPL_RET_BUF_DONE;
904 t3c_tid = lookup_atid(t, atid);
905 if (t3c_tid && t3c_tid->ctx && t3c_tid->client->handlers &&
906 t3c_tid->client->handlers[CPL_ACT_ESTABLISH]) {
907 return t3c_tid->client->handlers[CPL_ACT_ESTABLISH]
908 (dev, skb, t3c_tid->ctx);
910 printk(KERN_ERR "%s: received clientless CPL command 0x%x\n",
911 dev->name, CPL_ACT_ESTABLISH);
912 return CPL_RET_BUF_DONE | CPL_RET_BAD_MSG;
916 static int do_trace(struct t3cdev *dev, struct sk_buff *skb)
918 struct cpl_trace_pkt *p = cplhdr(skb);
920 skb->protocol = htons(0xffff);
921 skb->dev = dev->lldev;
922 skb_pull(skb, sizeof(*p));
923 skb_reset_mac_header(skb);
924 netif_receive_skb(skb);
929 * That skb would better have come from process_responses() where we abuse
930 * ->priority and ->csum to carry our data. NB: if we get to per-arch
931 * ->csum, the things might get really interesting here.
934 static inline u32 get_hwtid(struct sk_buff *skb)
936 return ntohl((__force __be32)skb->priority) >> 8 & 0xfffff;
939 static inline u32 get_opcode(struct sk_buff *skb)
941 return G_OPCODE(ntohl((__force __be32)skb->csum));
944 static int do_term(struct t3cdev *dev, struct sk_buff *skb)
946 unsigned int hwtid = get_hwtid(skb);
947 unsigned int opcode = get_opcode(skb);
948 struct t3c_tid_entry *t3c_tid;
950 t3c_tid = lookup_tid(&(T3C_DATA(dev))->tid_maps, hwtid);
951 if (t3c_tid && t3c_tid->ctx && t3c_tid->client->handlers &&
952 t3c_tid->client->handlers[opcode]) {
953 return t3c_tid->client->handlers[opcode] (dev, skb,
956 printk(KERN_ERR "%s: received clientless CPL command 0x%x\n",
958 return CPL_RET_BUF_DONE | CPL_RET_BAD_MSG;
962 static int nb_callback(struct notifier_block *self, unsigned long event,
966 case (NETEVENT_NEIGH_UPDATE):{
967 cxgb_neigh_update((struct neighbour *)ctx);
970 case (NETEVENT_PMTU_UPDATE):
972 case (NETEVENT_REDIRECT):{
973 struct netevent_redirect *nr = ctx;
974 cxgb_redirect(nr->old, nr->new);
975 cxgb_neigh_update(nr->new->neighbour);
984 static struct notifier_block nb = {
985 .notifier_call = nb_callback
989 * Process a received packet with an unknown/unexpected CPL opcode.
991 static int do_bad_cpl(struct t3cdev *dev, struct sk_buff *skb)
993 printk(KERN_ERR "%s: received bad CPL command 0x%x\n", dev->name,
995 return CPL_RET_BUF_DONE | CPL_RET_BAD_MSG;
999 * Handlers for each CPL opcode
1001 static cpl_handler_func cpl_handlers[NUM_CPL_CMDS];
1004 * Add a new handler to the CPL dispatch table. A NULL handler may be supplied
1005 * to unregister an existing handler.
1007 void t3_register_cpl_handler(unsigned int opcode, cpl_handler_func h)
1009 if (opcode < NUM_CPL_CMDS)
1010 cpl_handlers[opcode] = h ? h : do_bad_cpl;
1012 printk(KERN_ERR "T3C: handler registration for "
1013 "opcode %x failed\n", opcode);
1016 EXPORT_SYMBOL(t3_register_cpl_handler);
1019 * T3CDEV's receive method.
1021 static int process_rx(struct t3cdev *dev, struct sk_buff **skbs, int n)
1024 struct sk_buff *skb = *skbs++;
1025 unsigned int opcode = get_opcode(skb);
1026 int ret = cpl_handlers[opcode] (dev, skb);
1029 if (ret & CPL_RET_UNKNOWN_TID) {
1030 union opcode_tid *p = cplhdr(skb);
1032 printk(KERN_ERR "%s: CPL message (opcode %u) had "
1033 "unknown TID %u\n", dev->name, opcode,
1034 G_TID(ntohl(p->opcode_tid)));
1037 if (ret & CPL_RET_BUF_DONE)
1044 * Sends an sk_buff to a T3C driver after dealing with any active network taps.
1046 int cxgb3_ofld_send(struct t3cdev *dev, struct sk_buff *skb)
1051 r = dev->send(dev, skb);
1056 EXPORT_SYMBOL(cxgb3_ofld_send);
1058 static int is_offloading(struct net_device *dev)
1060 struct adapter *adapter;
1063 read_lock_bh(&adapter_list_lock);
1064 list_for_each_entry(adapter, &adapter_list, adapter_list) {
1065 for_each_port(adapter, i) {
1066 if (dev == adapter->port[i]) {
1067 read_unlock_bh(&adapter_list_lock);
1072 read_unlock_bh(&adapter_list_lock);
1076 static void cxgb_neigh_update(struct neighbour *neigh)
1078 struct net_device *dev = neigh->dev;
1080 if (dev && (is_offloading(dev))) {
1081 struct t3cdev *tdev = dev2t3cdev(dev);
1084 t3_l2t_update(tdev, neigh);
1088 static void set_l2t_ix(struct t3cdev *tdev, u32 tid, struct l2t_entry *e)
1090 struct sk_buff *skb;
1091 struct cpl_set_tcb_field *req;
1093 skb = alloc_skb(sizeof(*req), GFP_ATOMIC);
1095 printk(KERN_ERR "%s: cannot allocate skb!\n", __func__);
1098 skb->priority = CPL_PRIORITY_CONTROL;
1099 req = (struct cpl_set_tcb_field *)skb_put(skb, sizeof(*req));
1100 req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD));
1101 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, tid));
1104 req->word = htons(W_TCB_L2T_IX);
1105 req->mask = cpu_to_be64(V_TCB_L2T_IX(M_TCB_L2T_IX));
1106 req->val = cpu_to_be64(V_TCB_L2T_IX(e->idx));
1107 tdev->send(tdev, skb);
1110 static void cxgb_redirect(struct dst_entry *old, struct dst_entry *new)
1112 struct net_device *olddev, *newdev;
1113 struct tid_info *ti;
1114 struct t3cdev *tdev;
1117 struct l2t_entry *e;
1118 struct t3c_tid_entry *te;
1120 olddev = old->neighbour->dev;
1121 newdev = new->neighbour->dev;
1122 if (!is_offloading(olddev))
1124 if (!is_offloading(newdev)) {
1125 printk(KERN_WARNING "%s: Redirect to non-offload "
1126 "device ignored.\n", __func__);
1129 tdev = dev2t3cdev(olddev);
1131 if (tdev != dev2t3cdev(newdev)) {
1132 printk(KERN_WARNING "%s: Redirect to different "
1133 "offload device ignored.\n", __func__);
1137 /* Add new L2T entry */
1138 e = t3_l2t_get(tdev, new->neighbour, newdev);
1140 printk(KERN_ERR "%s: couldn't allocate new l2t entry!\n",
1145 /* Walk tid table and notify clients of dst change. */
1146 ti = &(T3C_DATA(tdev))->tid_maps;
1147 for (tid = 0; tid < ti->ntids; tid++) {
1148 te = lookup_tid(ti, tid);
1150 if (te && te->ctx && te->client && te->client->redirect) {
1151 update_tcb = te->client->redirect(te->ctx, old, new, e);
1153 l2t_hold(L2DATA(tdev), e);
1154 set_l2t_ix(tdev, tid, e);
1158 l2t_release(L2DATA(tdev), e);
1162 * Allocate a chunk of memory using kmalloc or, if that fails, vmalloc.
1163 * The allocated memory is cleared.
1165 void *cxgb_alloc_mem(unsigned long size)
1167 void *p = kmalloc(size, GFP_KERNEL);
1177 * Free memory allocated through t3_alloc_mem().
1179 void cxgb_free_mem(void *addr)
1181 if (is_vmalloc_addr(addr))
1188 * Allocate and initialize the TID tables. Returns 0 on success.
1190 static int init_tid_tabs(struct tid_info *t, unsigned int ntids,
1191 unsigned int natids, unsigned int nstids,
1192 unsigned int atid_base, unsigned int stid_base)
1194 unsigned long size = ntids * sizeof(*t->tid_tab) +
1195 natids * sizeof(*t->atid_tab) + nstids * sizeof(*t->stid_tab);
1197 t->tid_tab = cxgb_alloc_mem(size);
1201 t->stid_tab = (union listen_entry *)&t->tid_tab[ntids];
1202 t->atid_tab = (union active_open_entry *)&t->stid_tab[nstids];
1205 t->stid_base = stid_base;
1208 t->atid_base = atid_base;
1210 t->stids_in_use = t->atids_in_use = 0;
1211 atomic_set(&t->tids_in_use, 0);
1212 spin_lock_init(&t->stid_lock);
1213 spin_lock_init(&t->atid_lock);
1216 * Setup the free lists for stid_tab and atid_tab.
1220 t->stid_tab[nstids - 1].next = &t->stid_tab[nstids];
1221 t->sfree = t->stid_tab;
1225 t->atid_tab[natids - 1].next = &t->atid_tab[natids];
1226 t->afree = t->atid_tab;
1231 static void free_tid_maps(struct tid_info *t)
1233 cxgb_free_mem(t->tid_tab);
1236 static inline void add_adapter(struct adapter *adap)
1238 write_lock_bh(&adapter_list_lock);
1239 list_add_tail(&adap->adapter_list, &adapter_list);
1240 write_unlock_bh(&adapter_list_lock);
1243 static inline void remove_adapter(struct adapter *adap)
1245 write_lock_bh(&adapter_list_lock);
1246 list_del(&adap->adapter_list);
1247 write_unlock_bh(&adapter_list_lock);
1250 int cxgb3_offload_activate(struct adapter *adapter)
1252 struct t3cdev *dev = &adapter->tdev;
1255 struct tid_range stid_range, tid_range;
1256 struct mtutab mtutab;
1257 unsigned int l2t_capacity;
1259 t = kzalloc(sizeof(*t), GFP_KERNEL);
1264 if (dev->ctl(dev, GET_TX_MAX_CHUNK, &t->tx_max_chunk) < 0 ||
1265 dev->ctl(dev, GET_MAX_OUTSTANDING_WR, &t->max_wrs) < 0 ||
1266 dev->ctl(dev, GET_L2T_CAPACITY, &l2t_capacity) < 0 ||
1267 dev->ctl(dev, GET_MTUS, &mtutab) < 0 ||
1268 dev->ctl(dev, GET_TID_RANGE, &tid_range) < 0 ||
1269 dev->ctl(dev, GET_STID_RANGE, &stid_range) < 0)
1273 L2DATA(dev) = t3_init_l2t(l2t_capacity);
1277 natids = min(tid_range.num / 2, MAX_ATIDS);
1278 err = init_tid_tabs(&t->tid_maps, tid_range.num, natids,
1279 stid_range.num, ATID_BASE, stid_range.base);
1283 t->mtus = mtutab.mtus;
1284 t->nmtus = mtutab.size;
1286 INIT_WORK(&t->tid_release_task, t3_process_tid_release_list);
1287 spin_lock_init(&t->tid_release_lock);
1288 INIT_LIST_HEAD(&t->list_node);
1292 dev->recv = process_rx;
1293 dev->neigh_update = t3_l2t_update;
1295 /* Register netevent handler once */
1296 if (list_empty(&adapter_list))
1297 register_netevent_notifier(&nb);
1299 t->nofail_skb = alloc_skb(sizeof(struct cpl_tid_release), GFP_KERNEL);
1300 t->release_list_incomplete = 0;
1302 add_adapter(adapter);
1306 t3_free_l2t(L2DATA(dev));
1313 void cxgb3_offload_deactivate(struct adapter *adapter)
1315 struct t3cdev *tdev = &adapter->tdev;
1316 struct t3c_data *t = T3C_DATA(tdev);
1318 remove_adapter(adapter);
1319 if (list_empty(&adapter_list))
1320 unregister_netevent_notifier(&nb);
1322 free_tid_maps(&t->tid_maps);
1323 T3C_DATA(tdev) = NULL;
1324 t3_free_l2t(L2DATA(tdev));
1325 L2DATA(tdev) = NULL;
1327 kfree_skb(t->nofail_skb);
1331 static inline void register_tdev(struct t3cdev *tdev)
1335 mutex_lock(&cxgb3_db_lock);
1336 snprintf(tdev->name, sizeof(tdev->name), "ofld_dev%d", unit++);
1337 list_add_tail(&tdev->ofld_dev_list, &ofld_dev_list);
1338 mutex_unlock(&cxgb3_db_lock);
1341 static inline void unregister_tdev(struct t3cdev *tdev)
1343 mutex_lock(&cxgb3_db_lock);
1344 list_del(&tdev->ofld_dev_list);
1345 mutex_unlock(&cxgb3_db_lock);
1348 static inline int adap2type(struct adapter *adapter)
1352 switch (adapter->params.rev) {
1367 void __devinit cxgb3_adapter_ofld(struct adapter *adapter)
1369 struct t3cdev *tdev = &adapter->tdev;
1371 INIT_LIST_HEAD(&tdev->ofld_dev_list);
1373 cxgb3_set_dummy_ops(tdev);
1374 tdev->send = t3_offload_tx;
1375 tdev->ctl = cxgb_offload_ctl;
1376 tdev->type = adap2type(adapter);
1378 register_tdev(tdev);
1381 void __devexit cxgb3_adapter_unofld(struct adapter *adapter)
1383 struct t3cdev *tdev = &adapter->tdev;
1386 tdev->neigh_update = NULL;
1388 unregister_tdev(tdev);
1391 void __init cxgb3_offload_init(void)
1395 for (i = 0; i < NUM_CPL_CMDS; ++i)
1396 cpl_handlers[i] = do_bad_cpl;
1398 t3_register_cpl_handler(CPL_SMT_WRITE_RPL, do_smt_write_rpl);
1399 t3_register_cpl_handler(CPL_L2T_WRITE_RPL, do_l2t_write_rpl);
1400 t3_register_cpl_handler(CPL_RTE_WRITE_RPL, do_rte_write_rpl);
1401 t3_register_cpl_handler(CPL_PASS_OPEN_RPL, do_stid_rpl);
1402 t3_register_cpl_handler(CPL_CLOSE_LISTSRV_RPL, do_stid_rpl);
1403 t3_register_cpl_handler(CPL_PASS_ACCEPT_REQ, do_cr);
1404 t3_register_cpl_handler(CPL_PASS_ESTABLISH, do_hwtid_rpl);
1405 t3_register_cpl_handler(CPL_ABORT_RPL_RSS, do_hwtid_rpl);
1406 t3_register_cpl_handler(CPL_ABORT_RPL, do_hwtid_rpl);
1407 t3_register_cpl_handler(CPL_RX_URG_NOTIFY, do_hwtid_rpl);
1408 t3_register_cpl_handler(CPL_RX_DATA, do_hwtid_rpl);
1409 t3_register_cpl_handler(CPL_TX_DATA_ACK, do_hwtid_rpl);
1410 t3_register_cpl_handler(CPL_TX_DMA_ACK, do_hwtid_rpl);
1411 t3_register_cpl_handler(CPL_ACT_OPEN_RPL, do_act_open_rpl);
1412 t3_register_cpl_handler(CPL_PEER_CLOSE, do_hwtid_rpl);
1413 t3_register_cpl_handler(CPL_CLOSE_CON_RPL, do_hwtid_rpl);
1414 t3_register_cpl_handler(CPL_ABORT_REQ_RSS, do_abort_req_rss);
1415 t3_register_cpl_handler(CPL_ACT_ESTABLISH, do_act_establish);
1416 t3_register_cpl_handler(CPL_SET_TCB_RPL, do_hwtid_rpl);
1417 t3_register_cpl_handler(CPL_GET_TCB_RPL, do_hwtid_rpl);
1418 t3_register_cpl_handler(CPL_RDMA_TERMINATE, do_term);
1419 t3_register_cpl_handler(CPL_RDMA_EC_STATUS, do_hwtid_rpl);
1420 t3_register_cpl_handler(CPL_TRACE_PKT, do_trace);
1421 t3_register_cpl_handler(CPL_RX_DATA_DDP, do_hwtid_rpl);
1422 t3_register_cpl_handler(CPL_RX_DDP_COMPLETE, do_hwtid_rpl);
1423 t3_register_cpl_handler(CPL_ISCSI_HDR, do_hwtid_rpl);