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 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
35 #include <linux/list.h>
36 #include <linux/slab.h>
37 #include <net/neighbour.h>
38 #include <linux/notifier.h>
39 #include <linux/atomic.h>
40 #include <linux/proc_fs.h>
41 #include <linux/if_vlan.h>
42 #include <net/netevent.h>
43 #include <linux/highmem.h>
44 #include <linux/vmalloc.h>
45 #include <linux/export.h>
49 #include "cxgb3_ioctl.h"
50 #include "cxgb3_ctl_defs.h"
51 #include "cxgb3_defs.h"
53 #include "firmware_exports.h"
54 #include "cxgb3_offload.h"
56 static LIST_HEAD(client_list);
57 static LIST_HEAD(ofld_dev_list);
58 static DEFINE_MUTEX(cxgb3_db_lock);
60 static DEFINE_RWLOCK(adapter_list_lock);
61 static LIST_HEAD(adapter_list);
63 static const unsigned int MAX_ATIDS = 64 * 1024;
64 static const unsigned int ATID_BASE = 0x10000;
66 static void cxgb_neigh_update(struct neighbour *neigh);
67 static void cxgb_redirect(struct dst_entry *old, struct dst_entry *new,
68 struct neighbour *neigh, const void *daddr);
70 static inline int offload_activated(struct t3cdev *tdev)
72 const struct adapter *adapter = tdev2adap(tdev);
74 return test_bit(OFFLOAD_DEVMAP_BIT, &adapter->open_device_map);
78 * cxgb3_register_client - register an offload client
81 * Add the client to the client list,
82 * and call backs the client for each activated offload device
84 void cxgb3_register_client(struct cxgb3_client *client)
88 mutex_lock(&cxgb3_db_lock);
89 list_add_tail(&client->client_list, &client_list);
92 list_for_each_entry(tdev, &ofld_dev_list, ofld_dev_list) {
93 if (offload_activated(tdev))
97 mutex_unlock(&cxgb3_db_lock);
100 EXPORT_SYMBOL(cxgb3_register_client);
103 * cxgb3_unregister_client - unregister an offload client
104 * @client: the client
106 * Remove the client to the client list,
107 * and call backs the client for each activated offload device.
109 void cxgb3_unregister_client(struct cxgb3_client *client)
113 mutex_lock(&cxgb3_db_lock);
114 list_del(&client->client_list);
116 if (client->remove) {
117 list_for_each_entry(tdev, &ofld_dev_list, ofld_dev_list) {
118 if (offload_activated(tdev))
119 client->remove(tdev);
122 mutex_unlock(&cxgb3_db_lock);
125 EXPORT_SYMBOL(cxgb3_unregister_client);
128 * cxgb3_add_clients - activate registered clients for an offload device
129 * @tdev: the offload device
131 * Call backs all registered clients once a offload device is activated
133 void cxgb3_add_clients(struct t3cdev *tdev)
135 struct cxgb3_client *client;
137 mutex_lock(&cxgb3_db_lock);
138 list_for_each_entry(client, &client_list, client_list) {
142 mutex_unlock(&cxgb3_db_lock);
146 * cxgb3_remove_clients - deactivates registered clients
147 * for an offload device
148 * @tdev: the offload device
150 * Call backs all registered clients once a offload device is deactivated
152 void cxgb3_remove_clients(struct t3cdev *tdev)
154 struct cxgb3_client *client;
156 mutex_lock(&cxgb3_db_lock);
157 list_for_each_entry(client, &client_list, client_list) {
159 client->remove(tdev);
161 mutex_unlock(&cxgb3_db_lock);
164 void cxgb3_event_notify(struct t3cdev *tdev, u32 event, u32 port)
166 struct cxgb3_client *client;
168 mutex_lock(&cxgb3_db_lock);
169 list_for_each_entry(client, &client_list, client_list) {
170 if (client->event_handler)
171 client->event_handler(tdev, event, port);
173 mutex_unlock(&cxgb3_db_lock);
176 static struct net_device *get_iff_from_mac(struct adapter *adapter,
177 const unsigned char *mac,
182 for_each_port(adapter, i) {
183 struct net_device *dev = adapter->port[i];
185 if (ether_addr_equal(dev->dev_addr, mac)) {
187 if (vlan && vlan != VLAN_VID_MASK) {
188 dev = __vlan_find_dev_deep_rcu(dev, htons(ETH_P_8021Q), vlan);
189 } else if (netif_is_bond_slave(dev)) {
190 struct net_device *upper_dev;
193 netdev_master_upper_dev_get_rcu(dev)))
203 static int cxgb_ulp_iscsi_ctl(struct adapter *adapter, unsigned int req,
208 unsigned int val = 0;
209 struct ulp_iscsi_info *uiip = data;
212 case ULP_ISCSI_GET_PARAMS:
213 uiip->pdev = adapter->pdev;
214 uiip->llimit = t3_read_reg(adapter, A_ULPRX_ISCSI_LLIMIT);
215 uiip->ulimit = t3_read_reg(adapter, A_ULPRX_ISCSI_ULIMIT);
216 uiip->tagmask = t3_read_reg(adapter, A_ULPRX_ISCSI_TAGMASK);
218 val = t3_read_reg(adapter, A_ULPRX_ISCSI_PSZ);
219 for (i = 0; i < 4; i++, val >>= 8)
220 uiip->pgsz_factor[i] = val & 0xFF;
222 val = t3_read_reg(adapter, A_TP_PARA_REG7);
224 uiip->max_rxsz = min((val >> S_PMMAXXFERLEN0)&M_PMMAXXFERLEN0,
225 (val >> S_PMMAXXFERLEN1)&M_PMMAXXFERLEN1);
227 * On tx, the iscsi pdu has to be <= tx page size and has to
228 * fit into the Tx PM FIFO.
230 val = min(adapter->params.tp.tx_pg_size,
231 t3_read_reg(adapter, A_PM1_TX_CFG) >> 17);
232 uiip->max_txsz = min(val, uiip->max_txsz);
234 /* set MaxRxData to 16224 */
235 val = t3_read_reg(adapter, A_TP_PARA_REG2);
236 if ((val >> S_MAXRXDATA) != 0x3f60) {
237 val &= (M_RXCOALESCESIZE << S_RXCOALESCESIZE);
238 val |= V_MAXRXDATA(0x3f60);
239 pr_info("%s, iscsi set MaxRxData to 16224 (0x%x)\n",
241 t3_write_reg(adapter, A_TP_PARA_REG2, val);
245 * on rx, the iscsi pdu has to be < rx page size and the
246 * the max rx data length programmed in TP
248 val = min(adapter->params.tp.rx_pg_size,
249 ((t3_read_reg(adapter, A_TP_PARA_REG2)) >>
250 S_MAXRXDATA) & M_MAXRXDATA);
251 uiip->max_rxsz = min(val, uiip->max_rxsz);
253 case ULP_ISCSI_SET_PARAMS:
254 t3_write_reg(adapter, A_ULPRX_ISCSI_TAGMASK, uiip->tagmask);
255 /* program the ddp page sizes */
256 for (i = 0; i < 4; i++)
257 val |= (uiip->pgsz_factor[i] & 0xF) << (8 * i);
258 if (val && (val != t3_read_reg(adapter, A_ULPRX_ISCSI_PSZ))) {
259 pr_info("%s, setting iscsi pgsz 0x%x, %u,%u,%u,%u\n",
260 adapter->name, val, uiip->pgsz_factor[0],
261 uiip->pgsz_factor[1], uiip->pgsz_factor[2],
262 uiip->pgsz_factor[3]);
263 t3_write_reg(adapter, A_ULPRX_ISCSI_PSZ, val);
272 /* Response queue used for RDMA events. */
273 #define ASYNC_NOTIF_RSPQ 0
275 static int cxgb_rdma_ctl(struct adapter *adapter, unsigned int req, void *data)
280 case RDMA_GET_PARAMS: {
281 struct rdma_info *rdma = data;
282 struct pci_dev *pdev = adapter->pdev;
284 rdma->udbell_physbase = pci_resource_start(pdev, 2);
285 rdma->udbell_len = pci_resource_len(pdev, 2);
287 t3_read_reg(adapter, A_ULPTX_TPT_LLIMIT);
288 rdma->tpt_top = t3_read_reg(adapter, A_ULPTX_TPT_ULIMIT);
290 t3_read_reg(adapter, A_ULPTX_PBL_LLIMIT);
291 rdma->pbl_top = t3_read_reg(adapter, A_ULPTX_PBL_ULIMIT);
292 rdma->rqt_base = t3_read_reg(adapter, A_ULPRX_RQ_LLIMIT);
293 rdma->rqt_top = t3_read_reg(adapter, A_ULPRX_RQ_ULIMIT);
294 rdma->kdb_addr = adapter->regs + A_SG_KDOORBELL;
300 struct rdma_cq_op *rdma = data;
302 /* may be called in any context */
303 spin_lock_irqsave(&adapter->sge.reg_lock, flags);
304 ret = t3_sge_cqcntxt_op(adapter, rdma->id, rdma->op,
306 spin_unlock_irqrestore(&adapter->sge.reg_lock, flags);
310 struct ch_mem_range *t = data;
313 if ((t->addr & 7) || (t->len & 7))
315 if (t->mem_id == MEM_CM)
317 else if (t->mem_id == MEM_PMRX)
318 mem = &adapter->pmrx;
319 else if (t->mem_id == MEM_PMTX)
320 mem = &adapter->pmtx;
325 t3_mc7_bd_read(mem, t->addr / 8, t->len / 8,
332 struct rdma_cq_setup *rdma = data;
334 spin_lock_irq(&adapter->sge.reg_lock);
336 t3_sge_init_cqcntxt(adapter, rdma->id,
337 rdma->base_addr, rdma->size,
339 rdma->ovfl_mode, rdma->credits,
341 spin_unlock_irq(&adapter->sge.reg_lock);
344 case RDMA_CQ_DISABLE:
345 spin_lock_irq(&adapter->sge.reg_lock);
346 ret = t3_sge_disable_cqcntxt(adapter, *(unsigned int *)data);
347 spin_unlock_irq(&adapter->sge.reg_lock);
349 case RDMA_CTRL_QP_SETUP:{
350 struct rdma_ctrlqp_setup *rdma = data;
352 spin_lock_irq(&adapter->sge.reg_lock);
353 ret = t3_sge_init_ecntxt(adapter, FW_RI_SGEEC_START, 0,
356 rdma->base_addr, rdma->size,
357 FW_RI_TID_START, 1, 0);
358 spin_unlock_irq(&adapter->sge.reg_lock);
362 spin_lock(&adapter->stats_lock);
363 t3_tp_get_mib_stats(adapter, (struct tp_mib_stats *)data);
364 spin_unlock(&adapter->stats_lock);
373 static int cxgb_offload_ctl(struct t3cdev *tdev, unsigned int req, void *data)
375 struct adapter *adapter = tdev2adap(tdev);
376 struct tid_range *tid;
378 struct iff_mac *iffmacp;
379 struct ddp_params *ddpp;
380 struct adap_ports *ports;
381 struct ofld_page_info *rx_page_info;
382 struct tp_params *tp = &adapter->params.tp;
386 case GET_MAX_OUTSTANDING_WR:
387 *(unsigned int *)data = FW_WR_NUM;
390 *(unsigned int *)data = WR_FLITS;
392 case GET_TX_MAX_CHUNK:
393 *(unsigned int *)data = 1 << 20; /* 1MB */
397 tid->num = t3_mc5_size(&adapter->mc5) -
398 adapter->params.mc5.nroutes -
399 adapter->params.mc5.nfilters - adapter->params.mc5.nservers;
404 tid->num = adapter->params.mc5.nservers;
405 tid->base = t3_mc5_size(&adapter->mc5) - tid->num -
406 adapter->params.mc5.nfilters - adapter->params.mc5.nroutes;
408 case GET_L2T_CAPACITY:
409 *(unsigned int *)data = 2048;
414 mtup->mtus = adapter->params.mtus;
416 case GET_IFF_FROM_MAC:
418 iffmacp->dev = get_iff_from_mac(adapter, iffmacp->mac_addr,
424 ddpp->llimit = t3_read_reg(adapter, A_ULPRX_TDDP_LLIMIT);
425 ddpp->ulimit = t3_read_reg(adapter, A_ULPRX_TDDP_ULIMIT);
426 ddpp->tag_mask = t3_read_reg(adapter, A_ULPRX_TDDP_TAGMASK);
430 ports->nports = adapter->params.nports;
431 for_each_port(adapter, i)
432 ports->lldevs[i] = adapter->port[i];
434 case ULP_ISCSI_GET_PARAMS:
435 case ULP_ISCSI_SET_PARAMS:
436 if (!offload_running(adapter))
438 return cxgb_ulp_iscsi_ctl(adapter, req, data);
439 case RDMA_GET_PARAMS:
442 case RDMA_CQ_DISABLE:
443 case RDMA_CTRL_QP_SETUP:
446 if (!offload_running(adapter))
448 return cxgb_rdma_ctl(adapter, req, data);
449 case GET_RX_PAGE_INFO:
451 rx_page_info->page_size = tp->rx_pg_size;
452 rx_page_info->num = tp->rx_num_pgs;
454 case GET_ISCSI_IPV4ADDR: {
455 struct iscsi_ipv4addr *p = data;
456 struct port_info *pi = netdev_priv(p->dev);
457 p->ipv4addr = pi->iscsi_ipv4addr;
460 case GET_EMBEDDED_INFO: {
461 struct ch_embedded_info *e = data;
463 spin_lock(&adapter->stats_lock);
464 t3_get_fw_version(adapter, &e->fw_vers);
465 t3_get_tp_version(adapter, &e->tp_vers);
466 spin_unlock(&adapter->stats_lock);
476 * Dummy handler for Rx offload packets in case we get an offload packet before
477 * proper processing is setup. This complains and drops the packet as it isn't
478 * normal to get offload packets at this stage.
480 static int rx_offload_blackhole(struct t3cdev *dev, struct sk_buff **skbs,
484 dev_kfree_skb_any(skbs[n]);
488 static void dummy_neigh_update(struct t3cdev *dev, struct neighbour *neigh)
492 void cxgb3_set_dummy_ops(struct t3cdev *dev)
494 dev->recv = rx_offload_blackhole;
495 dev->neigh_update = dummy_neigh_update;
499 * Free an active-open TID.
501 void *cxgb3_free_atid(struct t3cdev *tdev, int atid)
503 struct tid_info *t = &(T3C_DATA(tdev))->tid_maps;
504 union active_open_entry *p = atid2entry(t, atid);
505 void *ctx = p->t3c_tid.ctx;
507 spin_lock_bh(&t->atid_lock);
511 spin_unlock_bh(&t->atid_lock);
516 EXPORT_SYMBOL(cxgb3_free_atid);
519 * Free a server TID and return it to the free pool.
521 void cxgb3_free_stid(struct t3cdev *tdev, int stid)
523 struct tid_info *t = &(T3C_DATA(tdev))->tid_maps;
524 union listen_entry *p = stid2entry(t, stid);
526 spin_lock_bh(&t->stid_lock);
530 spin_unlock_bh(&t->stid_lock);
533 EXPORT_SYMBOL(cxgb3_free_stid);
535 void cxgb3_insert_tid(struct t3cdev *tdev, struct cxgb3_client *client,
536 void *ctx, unsigned int tid)
538 struct tid_info *t = &(T3C_DATA(tdev))->tid_maps;
540 t->tid_tab[tid].client = client;
541 t->tid_tab[tid].ctx = ctx;
542 atomic_inc(&t->tids_in_use);
545 EXPORT_SYMBOL(cxgb3_insert_tid);
548 * Populate a TID_RELEASE WR. The skb must be already propely sized.
550 static inline void mk_tid_release(struct sk_buff *skb, unsigned int tid)
552 struct cpl_tid_release *req;
554 skb->priority = CPL_PRIORITY_SETUP;
555 req = __skb_put(skb, sizeof(*req));
556 req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD));
557 OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_TID_RELEASE, tid));
560 static void t3_process_tid_release_list(struct work_struct *work)
562 struct t3c_data *td = container_of(work, struct t3c_data,
565 struct t3cdev *tdev = td->dev;
568 spin_lock_bh(&td->tid_release_lock);
569 while (td->tid_release_list) {
570 struct t3c_tid_entry *p = td->tid_release_list;
572 td->tid_release_list = p->ctx;
573 spin_unlock_bh(&td->tid_release_lock);
575 skb = alloc_skb(sizeof(struct cpl_tid_release),
578 skb = td->nofail_skb;
580 spin_lock_bh(&td->tid_release_lock);
581 p->ctx = (void *)td->tid_release_list;
582 td->tid_release_list = p;
585 mk_tid_release(skb, p - td->tid_maps.tid_tab);
586 cxgb3_ofld_send(tdev, skb);
588 if (skb == td->nofail_skb)
590 alloc_skb(sizeof(struct cpl_tid_release),
592 spin_lock_bh(&td->tid_release_lock);
594 td->release_list_incomplete = (td->tid_release_list == NULL) ? 0 : 1;
595 spin_unlock_bh(&td->tid_release_lock);
599 alloc_skb(sizeof(struct cpl_tid_release),
603 /* use ctx as a next pointer in the tid release list */
604 void cxgb3_queue_tid_release(struct t3cdev *tdev, unsigned int tid)
606 struct t3c_data *td = T3C_DATA(tdev);
607 struct t3c_tid_entry *p = &td->tid_maps.tid_tab[tid];
609 spin_lock_bh(&td->tid_release_lock);
610 p->ctx = (void *)td->tid_release_list;
612 td->tid_release_list = p;
613 if (!p->ctx || td->release_list_incomplete)
614 schedule_work(&td->tid_release_task);
615 spin_unlock_bh(&td->tid_release_lock);
618 EXPORT_SYMBOL(cxgb3_queue_tid_release);
621 * Remove a tid from the TID table. A client may defer processing its last
622 * CPL message if it is locked at the time it arrives, and while the message
623 * sits in the client's backlog the TID may be reused for another connection.
624 * To handle this we atomically switch the TID association if it still points
625 * to the original client context.
627 void cxgb3_remove_tid(struct t3cdev *tdev, void *ctx, unsigned int tid)
629 struct tid_info *t = &(T3C_DATA(tdev))->tid_maps;
631 BUG_ON(tid >= t->ntids);
632 if (tdev->type == T3A)
633 (void)cmpxchg(&t->tid_tab[tid].ctx, ctx, NULL);
637 skb = alloc_skb(sizeof(struct cpl_tid_release), GFP_ATOMIC);
639 mk_tid_release(skb, tid);
640 cxgb3_ofld_send(tdev, skb);
641 t->tid_tab[tid].ctx = NULL;
643 cxgb3_queue_tid_release(tdev, tid);
645 atomic_dec(&t->tids_in_use);
648 EXPORT_SYMBOL(cxgb3_remove_tid);
650 int cxgb3_alloc_atid(struct t3cdev *tdev, struct cxgb3_client *client,
654 struct tid_info *t = &(T3C_DATA(tdev))->tid_maps;
656 spin_lock_bh(&t->atid_lock);
658 t->atids_in_use + atomic_read(&t->tids_in_use) + MC5_MIN_TIDS <=
660 union active_open_entry *p = t->afree;
662 atid = (p - t->atid_tab) + t->atid_base;
664 p->t3c_tid.ctx = ctx;
665 p->t3c_tid.client = client;
668 spin_unlock_bh(&t->atid_lock);
672 EXPORT_SYMBOL(cxgb3_alloc_atid);
674 int cxgb3_alloc_stid(struct t3cdev *tdev, struct cxgb3_client *client,
678 struct tid_info *t = &(T3C_DATA(tdev))->tid_maps;
680 spin_lock_bh(&t->stid_lock);
682 union listen_entry *p = t->sfree;
684 stid = (p - t->stid_tab) + t->stid_base;
686 p->t3c_tid.ctx = ctx;
687 p->t3c_tid.client = client;
690 spin_unlock_bh(&t->stid_lock);
694 EXPORT_SYMBOL(cxgb3_alloc_stid);
696 /* Get the t3cdev associated with a net_device */
697 struct t3cdev *dev2t3cdev(struct net_device *dev)
699 const struct port_info *pi = netdev_priv(dev);
701 return (struct t3cdev *)pi->adapter;
704 EXPORT_SYMBOL(dev2t3cdev);
706 static int do_smt_write_rpl(struct t3cdev *dev, struct sk_buff *skb)
708 struct cpl_smt_write_rpl *rpl = cplhdr(skb);
710 if (rpl->status != CPL_ERR_NONE)
711 pr_err("Unexpected SMT_WRITE_RPL status %u for entry %u\n",
712 rpl->status, GET_TID(rpl));
714 return CPL_RET_BUF_DONE;
717 static int do_l2t_write_rpl(struct t3cdev *dev, struct sk_buff *skb)
719 struct cpl_l2t_write_rpl *rpl = cplhdr(skb);
721 if (rpl->status != CPL_ERR_NONE)
722 pr_err("Unexpected L2T_WRITE_RPL status %u for entry %u\n",
723 rpl->status, GET_TID(rpl));
725 return CPL_RET_BUF_DONE;
728 static int do_rte_write_rpl(struct t3cdev *dev, struct sk_buff *skb)
730 struct cpl_rte_write_rpl *rpl = cplhdr(skb);
732 if (rpl->status != CPL_ERR_NONE)
733 pr_err("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 pr_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 pr_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 pr_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 pr_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 pr_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 pr_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_REDIRECT):{
971 struct netevent_redirect *nr = ctx;
972 cxgb_redirect(nr->old, nr->new, nr->neigh,
974 cxgb_neigh_update(nr->neigh);
983 static struct notifier_block nb = {
984 .notifier_call = nb_callback
988 * Process a received packet with an unknown/unexpected CPL opcode.
990 static int do_bad_cpl(struct t3cdev *dev, struct sk_buff *skb)
992 pr_err("%s: received bad CPL command 0x%x\n", dev->name, *skb->data);
993 return CPL_RET_BUF_DONE | CPL_RET_BAD_MSG;
997 * Handlers for each CPL opcode
999 static cpl_handler_func cpl_handlers[NUM_CPL_CMDS];
1002 * Add a new handler to the CPL dispatch table. A NULL handler may be supplied
1003 * to unregister an existing handler.
1005 void t3_register_cpl_handler(unsigned int opcode, cpl_handler_func h)
1007 if (opcode < NUM_CPL_CMDS)
1008 cpl_handlers[opcode] = h ? h : do_bad_cpl;
1010 pr_err("T3C: handler registration for opcode %x failed\n",
1014 EXPORT_SYMBOL(t3_register_cpl_handler);
1017 * T3CDEV's receive method.
1019 static int process_rx(struct t3cdev *dev, struct sk_buff **skbs, int n)
1022 struct sk_buff *skb = *skbs++;
1023 unsigned int opcode = get_opcode(skb);
1024 int ret = cpl_handlers[opcode] (dev, skb);
1027 if (ret & CPL_RET_UNKNOWN_TID) {
1028 union opcode_tid *p = cplhdr(skb);
1030 pr_err("%s: CPL message (opcode %u) had unknown TID %u\n",
1031 dev->name, opcode, G_TID(ntohl(p->opcode_tid)));
1034 if (ret & CPL_RET_BUF_DONE)
1041 * Sends an sk_buff to a T3C driver after dealing with any active network taps.
1043 int cxgb3_ofld_send(struct t3cdev *dev, struct sk_buff *skb)
1048 r = dev->send(dev, skb);
1053 EXPORT_SYMBOL(cxgb3_ofld_send);
1055 static int is_offloading(struct net_device *dev)
1057 struct adapter *adapter;
1060 read_lock_bh(&adapter_list_lock);
1061 list_for_each_entry(adapter, &adapter_list, adapter_list) {
1062 for_each_port(adapter, i) {
1063 if (dev == adapter->port[i]) {
1064 read_unlock_bh(&adapter_list_lock);
1069 read_unlock_bh(&adapter_list_lock);
1073 static void cxgb_neigh_update(struct neighbour *neigh)
1075 struct net_device *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 pr_err("%s: cannot allocate skb!\n", __func__);
1098 skb->priority = CPL_PRIORITY_CONTROL;
1099 req = 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,
1111 struct neighbour *neigh,
1114 struct net_device *dev;
1115 struct tid_info *ti;
1116 struct t3cdev *tdev;
1119 struct l2t_entry *e;
1120 struct t3c_tid_entry *te;
1124 if (!is_offloading(dev))
1126 tdev = dev2t3cdev(dev);
1129 /* Add new L2T entry */
1130 e = t3_l2t_get(tdev, new, dev, daddr);
1132 pr_err("%s: couldn't allocate new l2t entry!\n", __func__);
1136 /* Walk tid table and notify clients of dst change. */
1137 ti = &(T3C_DATA(tdev))->tid_maps;
1138 for (tid = 0; tid < ti->ntids; tid++) {
1139 te = lookup_tid(ti, tid);
1141 if (te && te->ctx && te->client && te->client->redirect) {
1142 update_tcb = te->client->redirect(te->ctx, old, new, e);
1145 l2t_hold(L2DATA(tdev), e);
1147 set_l2t_ix(tdev, tid, e);
1151 l2t_release(tdev, e);
1155 * Allocate and initialize the TID tables. Returns 0 on success.
1157 static int init_tid_tabs(struct tid_info *t, unsigned int ntids,
1158 unsigned int natids, unsigned int nstids,
1159 unsigned int atid_base, unsigned int stid_base)
1161 unsigned long size = ntids * sizeof(*t->tid_tab) +
1162 natids * sizeof(*t->atid_tab) + nstids * sizeof(*t->stid_tab);
1164 t->tid_tab = kvzalloc(size, GFP_KERNEL);
1168 t->stid_tab = (union listen_entry *)&t->tid_tab[ntids];
1169 t->atid_tab = (union active_open_entry *)&t->stid_tab[nstids];
1172 t->stid_base = stid_base;
1175 t->atid_base = atid_base;
1177 t->stids_in_use = t->atids_in_use = 0;
1178 atomic_set(&t->tids_in_use, 0);
1179 spin_lock_init(&t->stid_lock);
1180 spin_lock_init(&t->atid_lock);
1183 * Setup the free lists for stid_tab and atid_tab.
1187 t->stid_tab[nstids - 1].next = &t->stid_tab[nstids];
1188 t->sfree = t->stid_tab;
1192 t->atid_tab[natids - 1].next = &t->atid_tab[natids];
1193 t->afree = t->atid_tab;
1198 static void free_tid_maps(struct tid_info *t)
1203 static inline void add_adapter(struct adapter *adap)
1205 write_lock_bh(&adapter_list_lock);
1206 list_add_tail(&adap->adapter_list, &adapter_list);
1207 write_unlock_bh(&adapter_list_lock);
1210 static inline void remove_adapter(struct adapter *adap)
1212 write_lock_bh(&adapter_list_lock);
1213 list_del(&adap->adapter_list);
1214 write_unlock_bh(&adapter_list_lock);
1217 int cxgb3_offload_activate(struct adapter *adapter)
1219 struct t3cdev *dev = &adapter->tdev;
1222 struct tid_range stid_range, tid_range;
1223 struct mtutab mtutab;
1224 unsigned int l2t_capacity;
1225 struct l2t_data *l2td;
1227 t = kzalloc(sizeof(*t), GFP_KERNEL);
1232 if (dev->ctl(dev, GET_TX_MAX_CHUNK, &t->tx_max_chunk) < 0 ||
1233 dev->ctl(dev, GET_MAX_OUTSTANDING_WR, &t->max_wrs) < 0 ||
1234 dev->ctl(dev, GET_L2T_CAPACITY, &l2t_capacity) < 0 ||
1235 dev->ctl(dev, GET_MTUS, &mtutab) < 0 ||
1236 dev->ctl(dev, GET_TID_RANGE, &tid_range) < 0 ||
1237 dev->ctl(dev, GET_STID_RANGE, &stid_range) < 0)
1241 l2td = t3_init_l2t(l2t_capacity);
1245 natids = min(tid_range.num / 2, MAX_ATIDS);
1246 err = init_tid_tabs(&t->tid_maps, tid_range.num, natids,
1247 stid_range.num, ATID_BASE, stid_range.base);
1251 t->mtus = mtutab.mtus;
1252 t->nmtus = mtutab.size;
1254 INIT_WORK(&t->tid_release_task, t3_process_tid_release_list);
1255 spin_lock_init(&t->tid_release_lock);
1256 INIT_LIST_HEAD(&t->list_node);
1259 RCU_INIT_POINTER(dev->l2opt, l2td);
1261 dev->recv = process_rx;
1262 dev->neigh_update = t3_l2t_update;
1264 /* Register netevent handler once */
1265 if (list_empty(&adapter_list))
1266 register_netevent_notifier(&nb);
1268 t->nofail_skb = alloc_skb(sizeof(struct cpl_tid_release), GFP_KERNEL);
1269 t->release_list_incomplete = 0;
1271 add_adapter(adapter);
1281 static void clean_l2_data(struct rcu_head *head)
1283 struct l2t_data *d = container_of(head, struct l2t_data, rcu_head);
1288 void cxgb3_offload_deactivate(struct adapter *adapter)
1290 struct t3cdev *tdev = &adapter->tdev;
1291 struct t3c_data *t = T3C_DATA(tdev);
1294 remove_adapter(adapter);
1295 if (list_empty(&adapter_list))
1296 unregister_netevent_notifier(&nb);
1298 free_tid_maps(&t->tid_maps);
1299 T3C_DATA(tdev) = NULL;
1303 RCU_INIT_POINTER(tdev->l2opt, NULL);
1304 call_rcu(&d->rcu_head, clean_l2_data);
1305 kfree_skb(t->nofail_skb);
1309 static inline void register_tdev(struct t3cdev *tdev)
1313 mutex_lock(&cxgb3_db_lock);
1314 snprintf(tdev->name, sizeof(tdev->name), "ofld_dev%d", unit++);
1315 list_add_tail(&tdev->ofld_dev_list, &ofld_dev_list);
1316 mutex_unlock(&cxgb3_db_lock);
1319 static inline void unregister_tdev(struct t3cdev *tdev)
1321 mutex_lock(&cxgb3_db_lock);
1322 list_del(&tdev->ofld_dev_list);
1323 mutex_unlock(&cxgb3_db_lock);
1326 static inline int adap2type(struct adapter *adapter)
1330 switch (adapter->params.rev) {
1345 void cxgb3_adapter_ofld(struct adapter *adapter)
1347 struct t3cdev *tdev = &adapter->tdev;
1349 INIT_LIST_HEAD(&tdev->ofld_dev_list);
1351 cxgb3_set_dummy_ops(tdev);
1352 tdev->send = t3_offload_tx;
1353 tdev->ctl = cxgb_offload_ctl;
1354 tdev->type = adap2type(adapter);
1356 register_tdev(tdev);
1359 void cxgb3_adapter_unofld(struct adapter *adapter)
1361 struct t3cdev *tdev = &adapter->tdev;
1364 tdev->neigh_update = NULL;
1366 unregister_tdev(tdev);
1369 void __init cxgb3_offload_init(void)
1373 for (i = 0; i < NUM_CPL_CMDS; ++i)
1374 cpl_handlers[i] = do_bad_cpl;
1376 t3_register_cpl_handler(CPL_SMT_WRITE_RPL, do_smt_write_rpl);
1377 t3_register_cpl_handler(CPL_L2T_WRITE_RPL, do_l2t_write_rpl);
1378 t3_register_cpl_handler(CPL_RTE_WRITE_RPL, do_rte_write_rpl);
1379 t3_register_cpl_handler(CPL_PASS_OPEN_RPL, do_stid_rpl);
1380 t3_register_cpl_handler(CPL_CLOSE_LISTSRV_RPL, do_stid_rpl);
1381 t3_register_cpl_handler(CPL_PASS_ACCEPT_REQ, do_cr);
1382 t3_register_cpl_handler(CPL_PASS_ESTABLISH, do_hwtid_rpl);
1383 t3_register_cpl_handler(CPL_ABORT_RPL_RSS, do_hwtid_rpl);
1384 t3_register_cpl_handler(CPL_ABORT_RPL, do_hwtid_rpl);
1385 t3_register_cpl_handler(CPL_RX_URG_NOTIFY, do_hwtid_rpl);
1386 t3_register_cpl_handler(CPL_RX_DATA, do_hwtid_rpl);
1387 t3_register_cpl_handler(CPL_TX_DATA_ACK, do_hwtid_rpl);
1388 t3_register_cpl_handler(CPL_TX_DMA_ACK, do_hwtid_rpl);
1389 t3_register_cpl_handler(CPL_ACT_OPEN_RPL, do_act_open_rpl);
1390 t3_register_cpl_handler(CPL_PEER_CLOSE, do_hwtid_rpl);
1391 t3_register_cpl_handler(CPL_CLOSE_CON_RPL, do_hwtid_rpl);
1392 t3_register_cpl_handler(CPL_ABORT_REQ_RSS, do_abort_req_rss);
1393 t3_register_cpl_handler(CPL_ACT_ESTABLISH, do_act_establish);
1394 t3_register_cpl_handler(CPL_SET_TCB_RPL, do_hwtid_rpl);
1395 t3_register_cpl_handler(CPL_GET_TCB_RPL, do_hwtid_rpl);
1396 t3_register_cpl_handler(CPL_RDMA_TERMINATE, do_term);
1397 t3_register_cpl_handler(CPL_RDMA_EC_STATUS, do_hwtid_rpl);
1398 t3_register_cpl_handler(CPL_TRACE_PKT, do_trace);
1399 t3_register_cpl_handler(CPL_RX_DATA_DDP, do_hwtid_rpl);
1400 t3_register_cpl_handler(CPL_RX_DDP_COMPLETE, do_hwtid_rpl);
1401 t3_register_cpl_handler(CPL_ISCSI_HDR, do_hwtid_rpl);