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4d22de3e | 1 | /* |
a02d44a0 | 2 | * Copyright (c) 2006-2008 Chelsio, Inc. All rights reserved. |
4d22de3e DLR |
3 | * |
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: | |
9 | * | |
10 | * Redistribution and use in source and binary forms, with or | |
11 | * without modification, are permitted provided that the following | |
12 | * conditions are met: | |
13 | * | |
14 | * - Redistributions of source code must retain the above | |
15 | * copyright notice, this list of conditions and the following | |
16 | * disclaimer. | |
17 | * | |
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. | |
22 | * | |
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 | |
30 | * SOFTWARE. | |
31 | */ | |
32 | ||
33 | #include <linux/list.h> | |
5a0e3ad6 | 34 | #include <linux/slab.h> |
4d22de3e DLR |
35 | #include <net/neighbour.h> |
36 | #include <linux/notifier.h> | |
60063497 | 37 | #include <linux/atomic.h> |
4d22de3e DLR |
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> | |
43 | ||
44 | #include "common.h" | |
45 | #include "regs.h" | |
46 | #include "cxgb3_ioctl.h" | |
47 | #include "cxgb3_ctl_defs.h" | |
48 | #include "cxgb3_defs.h" | |
49 | #include "l2t.h" | |
50 | #include "firmware_exports.h" | |
51 | #include "cxgb3_offload.h" | |
52 | ||
53 | static LIST_HEAD(client_list); | |
54 | static LIST_HEAD(ofld_dev_list); | |
55 | static DEFINE_MUTEX(cxgb3_db_lock); | |
56 | ||
57 | static DEFINE_RWLOCK(adapter_list_lock); | |
58 | static LIST_HEAD(adapter_list); | |
59 | ||
60 | static const unsigned int MAX_ATIDS = 64 * 1024; | |
c9a6ce50 | 61 | static const unsigned int ATID_BASE = 0x10000; |
4d22de3e | 62 | |
a5190b4e | 63 | static void cxgb_neigh_update(struct neighbour *neigh); |
64 | static void cxgb_redirect(struct dst_entry *old, struct dst_entry *new); | |
65 | ||
4d22de3e DLR |
66 | static inline int offload_activated(struct t3cdev *tdev) |
67 | { | |
68 | const struct adapter *adapter = tdev2adap(tdev); | |
69 | ||
807540ba | 70 | return test_bit(OFFLOAD_DEVMAP_BIT, &adapter->open_device_map); |
4d22de3e DLR |
71 | } |
72 | ||
73 | /** | |
74 | * cxgb3_register_client - register an offload client | |
75 | * @client: the client | |
76 | * | |
77 | * Add the client to the client list, | |
78 | * and call backs the client for each activated offload device | |
79 | */ | |
80 | void cxgb3_register_client(struct cxgb3_client *client) | |
81 | { | |
82 | struct t3cdev *tdev; | |
83 | ||
84 | mutex_lock(&cxgb3_db_lock); | |
85 | list_add_tail(&client->client_list, &client_list); | |
86 | ||
87 | if (client->add) { | |
88 | list_for_each_entry(tdev, &ofld_dev_list, ofld_dev_list) { | |
89 | if (offload_activated(tdev)) | |
90 | client->add(tdev); | |
91 | } | |
92 | } | |
93 | mutex_unlock(&cxgb3_db_lock); | |
94 | } | |
95 | ||
96 | EXPORT_SYMBOL(cxgb3_register_client); | |
97 | ||
98 | /** | |
99 | * cxgb3_unregister_client - unregister an offload client | |
100 | * @client: the client | |
101 | * | |
102 | * Remove the client to the client list, | |
103 | * and call backs the client for each activated offload device. | |
104 | */ | |
105 | void cxgb3_unregister_client(struct cxgb3_client *client) | |
106 | { | |
107 | struct t3cdev *tdev; | |
108 | ||
109 | mutex_lock(&cxgb3_db_lock); | |
110 | list_del(&client->client_list); | |
111 | ||
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); | |
116 | } | |
117 | } | |
118 | mutex_unlock(&cxgb3_db_lock); | |
119 | } | |
120 | ||
121 | EXPORT_SYMBOL(cxgb3_unregister_client); | |
122 | ||
123 | /** | |
124 | * cxgb3_add_clients - activate registered clients for an offload device | |
125 | * @tdev: the offload device | |
126 | * | |
127 | * Call backs all registered clients once a offload device is activated | |
128 | */ | |
129 | void cxgb3_add_clients(struct t3cdev *tdev) | |
130 | { | |
131 | struct cxgb3_client *client; | |
132 | ||
133 | mutex_lock(&cxgb3_db_lock); | |
134 | list_for_each_entry(client, &client_list, client_list) { | |
135 | if (client->add) | |
136 | client->add(tdev); | |
137 | } | |
138 | mutex_unlock(&cxgb3_db_lock); | |
139 | } | |
140 | ||
141 | /** | |
142 | * cxgb3_remove_clients - deactivates registered clients | |
143 | * for an offload device | |
144 | * @tdev: the offload device | |
145 | * | |
146 | * Call backs all registered clients once a offload device is deactivated | |
147 | */ | |
148 | void cxgb3_remove_clients(struct t3cdev *tdev) | |
149 | { | |
150 | struct cxgb3_client *client; | |
151 | ||
152 | mutex_lock(&cxgb3_db_lock); | |
153 | list_for_each_entry(client, &client_list, client_list) { | |
154 | if (client->remove) | |
155 | client->remove(tdev); | |
156 | } | |
157 | mutex_unlock(&cxgb3_db_lock); | |
158 | } | |
159 | ||
fa0d4c11 | 160 | void cxgb3_event_notify(struct t3cdev *tdev, u32 event, u32 port) |
cb0bc205 DLR |
161 | { |
162 | struct cxgb3_client *client; | |
163 | ||
164 | mutex_lock(&cxgb3_db_lock); | |
165 | list_for_each_entry(client, &client_list, client_list) { | |
fa0d4c11 SW |
166 | if (client->event_handler) |
167 | client->event_handler(tdev, event, port); | |
cb0bc205 DLR |
168 | } |
169 | mutex_unlock(&cxgb3_db_lock); | |
170 | } | |
171 | ||
4d22de3e DLR |
172 | static struct net_device *get_iff_from_mac(struct adapter *adapter, |
173 | const unsigned char *mac, | |
174 | unsigned int vlan) | |
175 | { | |
176 | int i; | |
177 | ||
178 | for_each_port(adapter, i) { | |
4d22de3e | 179 | struct net_device *dev = adapter->port[i]; |
4d22de3e DLR |
180 | |
181 | if (!memcmp(dev->dev_addr, mac, ETH_ALEN)) { | |
182 | if (vlan && vlan != VLAN_VID_MASK) { | |
892ef5d8 JP |
183 | rcu_read_lock(); |
184 | dev = __vlan_find_dev_deep(dev, vlan); | |
185 | rcu_read_unlock(); | |
1765a575 | 186 | } else if (netif_is_bond_slave(dev)) { |
4d22de3e DLR |
187 | while (dev->master) |
188 | dev = dev->master; | |
1765a575 | 189 | } |
4d22de3e DLR |
190 | return dev; |
191 | } | |
192 | } | |
193 | return NULL; | |
194 | } | |
195 | ||
196 | static int cxgb_ulp_iscsi_ctl(struct adapter *adapter, unsigned int req, | |
197 | void *data) | |
198 | { | |
a109a5b9 | 199 | int i; |
4d22de3e | 200 | int ret = 0; |
a109a5b9 | 201 | unsigned int val = 0; |
4d22de3e DLR |
202 | struct ulp_iscsi_info *uiip = data; |
203 | ||
204 | switch (req) { | |
205 | case ULP_ISCSI_GET_PARAMS: | |
206 | uiip->pdev = adapter->pdev; | |
207 | uiip->llimit = t3_read_reg(adapter, A_ULPRX_ISCSI_LLIMIT); | |
208 | uiip->ulimit = t3_read_reg(adapter, A_ULPRX_ISCSI_ULIMIT); | |
209 | uiip->tagmask = t3_read_reg(adapter, A_ULPRX_ISCSI_TAGMASK); | |
a109a5b9 KX |
210 | |
211 | val = t3_read_reg(adapter, A_ULPRX_ISCSI_PSZ); | |
212 | for (i = 0; i < 4; i++, val >>= 8) | |
213 | uiip->pgsz_factor[i] = val & 0xFF; | |
214 | ||
215 | val = t3_read_reg(adapter, A_TP_PARA_REG7); | |
216 | uiip->max_txsz = | |
217 | uiip->max_rxsz = min((val >> S_PMMAXXFERLEN0)&M_PMMAXXFERLEN0, | |
218 | (val >> S_PMMAXXFERLEN1)&M_PMMAXXFERLEN1); | |
4d22de3e DLR |
219 | /* |
220 | * On tx, the iscsi pdu has to be <= tx page size and has to | |
221 | * fit into the Tx PM FIFO. | |
222 | */ | |
a109a5b9 KX |
223 | val = min(adapter->params.tp.tx_pg_size, |
224 | t3_read_reg(adapter, A_PM1_TX_CFG) >> 17); | |
225 | uiip->max_txsz = min(val, uiip->max_txsz); | |
226 | ||
227 | /* set MaxRxData to 16224 */ | |
228 | val = t3_read_reg(adapter, A_TP_PARA_REG2); | |
229 | if ((val >> S_MAXRXDATA) != 0x3f60) { | |
230 | val &= (M_RXCOALESCESIZE << S_RXCOALESCESIZE); | |
231 | val |= V_MAXRXDATA(0x3f60); | |
232 | printk(KERN_INFO | |
233 | "%s, iscsi set MaxRxData to 16224 (0x%x).\n", | |
234 | adapter->name, val); | |
235 | t3_write_reg(adapter, A_TP_PARA_REG2, val); | |
236 | } | |
237 | ||
238 | /* | |
239 | * on rx, the iscsi pdu has to be < rx page size and the | |
240 | * the max rx data length programmed in TP | |
241 | */ | |
242 | val = min(adapter->params.tp.rx_pg_size, | |
243 | ((t3_read_reg(adapter, A_TP_PARA_REG2)) >> | |
244 | S_MAXRXDATA) & M_MAXRXDATA); | |
245 | uiip->max_rxsz = min(val, uiip->max_rxsz); | |
4d22de3e DLR |
246 | break; |
247 | case ULP_ISCSI_SET_PARAMS: | |
248 | t3_write_reg(adapter, A_ULPRX_ISCSI_TAGMASK, uiip->tagmask); | |
9439f749 | 249 | /* program the ddp page sizes */ |
a109a5b9 KX |
250 | for (i = 0; i < 4; i++) |
251 | val |= (uiip->pgsz_factor[i] & 0xF) << (8 * i); | |
252 | if (val && (val != t3_read_reg(adapter, A_ULPRX_ISCSI_PSZ))) { | |
253 | printk(KERN_INFO | |
254 | "%s, setting iscsi pgsz 0x%x, %u,%u,%u,%u.\n", | |
255 | adapter->name, val, uiip->pgsz_factor[0], | |
256 | uiip->pgsz_factor[1], uiip->pgsz_factor[2], | |
257 | uiip->pgsz_factor[3]); | |
258 | t3_write_reg(adapter, A_ULPRX_ISCSI_PSZ, val); | |
9439f749 | 259 | } |
4d22de3e DLR |
260 | break; |
261 | default: | |
262 | ret = -EOPNOTSUPP; | |
263 | } | |
264 | return ret; | |
265 | } | |
266 | ||
267 | /* Response queue used for RDMA events. */ | |
268 | #define ASYNC_NOTIF_RSPQ 0 | |
269 | ||
270 | static int cxgb_rdma_ctl(struct adapter *adapter, unsigned int req, void *data) | |
271 | { | |
272 | int ret = 0; | |
273 | ||
274 | switch (req) { | |
9265fabf SH |
275 | case RDMA_GET_PARAMS: { |
276 | struct rdma_info *rdma = data; | |
4d22de3e DLR |
277 | struct pci_dev *pdev = adapter->pdev; |
278 | ||
9265fabf SH |
279 | rdma->udbell_physbase = pci_resource_start(pdev, 2); |
280 | rdma->udbell_len = pci_resource_len(pdev, 2); | |
281 | rdma->tpt_base = | |
4d22de3e | 282 | t3_read_reg(adapter, A_ULPTX_TPT_LLIMIT); |
9265fabf SH |
283 | rdma->tpt_top = t3_read_reg(adapter, A_ULPTX_TPT_ULIMIT); |
284 | rdma->pbl_base = | |
4d22de3e | 285 | t3_read_reg(adapter, A_ULPTX_PBL_LLIMIT); |
9265fabf SH |
286 | rdma->pbl_top = t3_read_reg(adapter, A_ULPTX_PBL_ULIMIT); |
287 | rdma->rqt_base = t3_read_reg(adapter, A_ULPRX_RQ_LLIMIT); | |
288 | rdma->rqt_top = t3_read_reg(adapter, A_ULPRX_RQ_ULIMIT); | |
289 | rdma->kdb_addr = adapter->regs + A_SG_KDOORBELL; | |
290 | rdma->pdev = pdev; | |
4d22de3e DLR |
291 | break; |
292 | } | |
293 | case RDMA_CQ_OP:{ | |
294 | unsigned long flags; | |
9265fabf | 295 | struct rdma_cq_op *rdma = data; |
4d22de3e DLR |
296 | |
297 | /* may be called in any context */ | |
298 | spin_lock_irqsave(&adapter->sge.reg_lock, flags); | |
9265fabf SH |
299 | ret = t3_sge_cqcntxt_op(adapter, rdma->id, rdma->op, |
300 | rdma->credits); | |
4d22de3e DLR |
301 | spin_unlock_irqrestore(&adapter->sge.reg_lock, flags); |
302 | break; | |
303 | } | |
304 | case RDMA_GET_MEM:{ | |
305 | struct ch_mem_range *t = data; | |
306 | struct mc7 *mem; | |
307 | ||
308 | if ((t->addr & 7) || (t->len & 7)) | |
309 | return -EINVAL; | |
310 | if (t->mem_id == MEM_CM) | |
311 | mem = &adapter->cm; | |
312 | else if (t->mem_id == MEM_PMRX) | |
313 | mem = &adapter->pmrx; | |
314 | else if (t->mem_id == MEM_PMTX) | |
315 | mem = &adapter->pmtx; | |
316 | else | |
317 | return -EINVAL; | |
318 | ||
319 | ret = | |
320 | t3_mc7_bd_read(mem, t->addr / 8, t->len / 8, | |
321 | (u64 *) t->buf); | |
322 | if (ret) | |
323 | return ret; | |
324 | break; | |
325 | } | |
326 | case RDMA_CQ_SETUP:{ | |
9265fabf | 327 | struct rdma_cq_setup *rdma = data; |
4d22de3e DLR |
328 | |
329 | spin_lock_irq(&adapter->sge.reg_lock); | |
330 | ret = | |
9265fabf SH |
331 | t3_sge_init_cqcntxt(adapter, rdma->id, |
332 | rdma->base_addr, rdma->size, | |
4d22de3e | 333 | ASYNC_NOTIF_RSPQ, |
9265fabf SH |
334 | rdma->ovfl_mode, rdma->credits, |
335 | rdma->credit_thres); | |
4d22de3e DLR |
336 | spin_unlock_irq(&adapter->sge.reg_lock); |
337 | break; | |
338 | } | |
339 | case RDMA_CQ_DISABLE: | |
340 | spin_lock_irq(&adapter->sge.reg_lock); | |
341 | ret = t3_sge_disable_cqcntxt(adapter, *(unsigned int *)data); | |
342 | spin_unlock_irq(&adapter->sge.reg_lock); | |
343 | break; | |
344 | case RDMA_CTRL_QP_SETUP:{ | |
9265fabf | 345 | struct rdma_ctrlqp_setup *rdma = data; |
4d22de3e DLR |
346 | |
347 | spin_lock_irq(&adapter->sge.reg_lock); | |
348 | ret = t3_sge_init_ecntxt(adapter, FW_RI_SGEEC_START, 0, | |
349 | SGE_CNTXT_RDMA, | |
350 | ASYNC_NOTIF_RSPQ, | |
9265fabf | 351 | rdma->base_addr, rdma->size, |
4d22de3e DLR |
352 | FW_RI_TID_START, 1, 0); |
353 | spin_unlock_irq(&adapter->sge.reg_lock); | |
354 | break; | |
355 | } | |
14cc180f SW |
356 | case RDMA_GET_MIB: { |
357 | spin_lock(&adapter->stats_lock); | |
358 | t3_tp_get_mib_stats(adapter, (struct tp_mib_stats *)data); | |
359 | spin_unlock(&adapter->stats_lock); | |
360 | break; | |
361 | } | |
4d22de3e DLR |
362 | default: |
363 | ret = -EOPNOTSUPP; | |
364 | } | |
365 | return ret; | |
366 | } | |
367 | ||
368 | static int cxgb_offload_ctl(struct t3cdev *tdev, unsigned int req, void *data) | |
369 | { | |
370 | struct adapter *adapter = tdev2adap(tdev); | |
371 | struct tid_range *tid; | |
372 | struct mtutab *mtup; | |
373 | struct iff_mac *iffmacp; | |
374 | struct ddp_params *ddpp; | |
375 | struct adap_ports *ports; | |
e22bb45d DLR |
376 | struct ofld_page_info *rx_page_info; |
377 | struct tp_params *tp = &adapter->params.tp; | |
4d22de3e DLR |
378 | int i; |
379 | ||
380 | switch (req) { | |
381 | case GET_MAX_OUTSTANDING_WR: | |
382 | *(unsigned int *)data = FW_WR_NUM; | |
383 | break; | |
384 | case GET_WR_LEN: | |
385 | *(unsigned int *)data = WR_FLITS; | |
386 | break; | |
387 | case GET_TX_MAX_CHUNK: | |
388 | *(unsigned int *)data = 1 << 20; /* 1MB */ | |
389 | break; | |
390 | case GET_TID_RANGE: | |
391 | tid = data; | |
392 | tid->num = t3_mc5_size(&adapter->mc5) - | |
393 | adapter->params.mc5.nroutes - | |
394 | adapter->params.mc5.nfilters - adapter->params.mc5.nservers; | |
395 | tid->base = 0; | |
396 | break; | |
397 | case GET_STID_RANGE: | |
398 | tid = data; | |
399 | tid->num = adapter->params.mc5.nservers; | |
400 | tid->base = t3_mc5_size(&adapter->mc5) - tid->num - | |
401 | adapter->params.mc5.nfilters - adapter->params.mc5.nroutes; | |
402 | break; | |
403 | case GET_L2T_CAPACITY: | |
404 | *(unsigned int *)data = 2048; | |
405 | break; | |
406 | case GET_MTUS: | |
407 | mtup = data; | |
408 | mtup->size = NMTUS; | |
409 | mtup->mtus = adapter->params.mtus; | |
410 | break; | |
411 | case GET_IFF_FROM_MAC: | |
412 | iffmacp = data; | |
413 | iffmacp->dev = get_iff_from_mac(adapter, iffmacp->mac_addr, | |
414 | iffmacp->vlan_tag & | |
415 | VLAN_VID_MASK); | |
416 | break; | |
417 | case GET_DDP_PARAMS: | |
418 | ddpp = data; | |
419 | ddpp->llimit = t3_read_reg(adapter, A_ULPRX_TDDP_LLIMIT); | |
420 | ddpp->ulimit = t3_read_reg(adapter, A_ULPRX_TDDP_ULIMIT); | |
421 | ddpp->tag_mask = t3_read_reg(adapter, A_ULPRX_TDDP_TAGMASK); | |
422 | break; | |
423 | case GET_PORTS: | |
424 | ports = data; | |
425 | ports->nports = adapter->params.nports; | |
426 | for_each_port(adapter, i) | |
427 | ports->lldevs[i] = adapter->port[i]; | |
428 | break; | |
429 | case ULP_ISCSI_GET_PARAMS: | |
430 | case ULP_ISCSI_SET_PARAMS: | |
431 | if (!offload_running(adapter)) | |
432 | return -EAGAIN; | |
433 | return cxgb_ulp_iscsi_ctl(adapter, req, data); | |
434 | case RDMA_GET_PARAMS: | |
435 | case RDMA_CQ_OP: | |
436 | case RDMA_CQ_SETUP: | |
437 | case RDMA_CQ_DISABLE: | |
438 | case RDMA_CTRL_QP_SETUP: | |
439 | case RDMA_GET_MEM: | |
14cc180f | 440 | case RDMA_GET_MIB: |
4d22de3e DLR |
441 | if (!offload_running(adapter)) |
442 | return -EAGAIN; | |
443 | return cxgb_rdma_ctl(adapter, req, data); | |
e22bb45d DLR |
444 | case GET_RX_PAGE_INFO: |
445 | rx_page_info = data; | |
446 | rx_page_info->page_size = tp->rx_pg_size; | |
447 | rx_page_info->num = tp->rx_num_pgs; | |
448 | break; | |
a109a5b9 KX |
449 | case GET_ISCSI_IPV4ADDR: { |
450 | struct iscsi_ipv4addr *p = data; | |
451 | struct port_info *pi = netdev_priv(p->dev); | |
452 | p->ipv4addr = pi->iscsi_ipv4addr; | |
453 | break; | |
454 | } | |
4d8cd002 DLR |
455 | case GET_EMBEDDED_INFO: { |
456 | struct ch_embedded_info *e = data; | |
457 | ||
458 | spin_lock(&adapter->stats_lock); | |
459 | t3_get_fw_version(adapter, &e->fw_vers); | |
460 | t3_get_tp_version(adapter, &e->tp_vers); | |
461 | spin_unlock(&adapter->stats_lock); | |
462 | break; | |
463 | } | |
4d22de3e DLR |
464 | default: |
465 | return -EOPNOTSUPP; | |
466 | } | |
467 | return 0; | |
468 | } | |
469 | ||
470 | /* | |
471 | * Dummy handler for Rx offload packets in case we get an offload packet before | |
472 | * proper processing is setup. This complains and drops the packet as it isn't | |
473 | * normal to get offload packets at this stage. | |
474 | */ | |
475 | static int rx_offload_blackhole(struct t3cdev *dev, struct sk_buff **skbs, | |
476 | int n) | |
477 | { | |
4d22de3e DLR |
478 | while (n--) |
479 | dev_kfree_skb_any(skbs[n]); | |
480 | return 0; | |
481 | } | |
482 | ||
483 | static void dummy_neigh_update(struct t3cdev *dev, struct neighbour *neigh) | |
484 | { | |
485 | } | |
486 | ||
487 | void cxgb3_set_dummy_ops(struct t3cdev *dev) | |
488 | { | |
489 | dev->recv = rx_offload_blackhole; | |
490 | dev->neigh_update = dummy_neigh_update; | |
491 | } | |
492 | ||
493 | /* | |
494 | * Free an active-open TID. | |
495 | */ | |
496 | void *cxgb3_free_atid(struct t3cdev *tdev, int atid) | |
497 | { | |
498 | struct tid_info *t = &(T3C_DATA(tdev))->tid_maps; | |
499 | union active_open_entry *p = atid2entry(t, atid); | |
500 | void *ctx = p->t3c_tid.ctx; | |
501 | ||
502 | spin_lock_bh(&t->atid_lock); | |
503 | p->next = t->afree; | |
504 | t->afree = p; | |
505 | t->atids_in_use--; | |
506 | spin_unlock_bh(&t->atid_lock); | |
507 | ||
508 | return ctx; | |
509 | } | |
510 | ||
511 | EXPORT_SYMBOL(cxgb3_free_atid); | |
512 | ||
513 | /* | |
514 | * Free a server TID and return it to the free pool. | |
515 | */ | |
516 | void cxgb3_free_stid(struct t3cdev *tdev, int stid) | |
517 | { | |
518 | struct tid_info *t = &(T3C_DATA(tdev))->tid_maps; | |
519 | union listen_entry *p = stid2entry(t, stid); | |
520 | ||
521 | spin_lock_bh(&t->stid_lock); | |
522 | p->next = t->sfree; | |
523 | t->sfree = p; | |
524 | t->stids_in_use--; | |
525 | spin_unlock_bh(&t->stid_lock); | |
526 | } | |
527 | ||
528 | EXPORT_SYMBOL(cxgb3_free_stid); | |
529 | ||
530 | void cxgb3_insert_tid(struct t3cdev *tdev, struct cxgb3_client *client, | |
531 | void *ctx, unsigned int tid) | |
532 | { | |
533 | struct tid_info *t = &(T3C_DATA(tdev))->tid_maps; | |
534 | ||
535 | t->tid_tab[tid].client = client; | |
536 | t->tid_tab[tid].ctx = ctx; | |
537 | atomic_inc(&t->tids_in_use); | |
538 | } | |
539 | ||
540 | EXPORT_SYMBOL(cxgb3_insert_tid); | |
541 | ||
542 | /* | |
543 | * Populate a TID_RELEASE WR. The skb must be already propely sized. | |
544 | */ | |
545 | static inline void mk_tid_release(struct sk_buff *skb, unsigned int tid) | |
546 | { | |
547 | struct cpl_tid_release *req; | |
548 | ||
549 | skb->priority = CPL_PRIORITY_SETUP; | |
550 | req = (struct cpl_tid_release *)__skb_put(skb, sizeof(*req)); | |
551 | req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD)); | |
552 | OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_TID_RELEASE, tid)); | |
553 | } | |
554 | ||
555 | static void t3_process_tid_release_list(struct work_struct *work) | |
556 | { | |
557 | struct t3c_data *td = container_of(work, struct t3c_data, | |
558 | tid_release_task); | |
559 | struct sk_buff *skb; | |
560 | struct t3cdev *tdev = td->dev; | |
2eab17ab | 561 | |
4d22de3e DLR |
562 | |
563 | spin_lock_bh(&td->tid_release_lock); | |
564 | while (td->tid_release_list) { | |
565 | struct t3c_tid_entry *p = td->tid_release_list; | |
566 | ||
43d620c8 | 567 | td->tid_release_list = p->ctx; |
4d22de3e DLR |
568 | spin_unlock_bh(&td->tid_release_lock); |
569 | ||
570 | skb = alloc_skb(sizeof(struct cpl_tid_release), | |
74b793e1 DLR |
571 | GFP_KERNEL); |
572 | if (!skb) | |
573 | skb = td->nofail_skb; | |
574 | if (!skb) { | |
575 | spin_lock_bh(&td->tid_release_lock); | |
576 | p->ctx = (void *)td->tid_release_list; | |
577 | td->tid_release_list = (struct t3c_tid_entry *)p; | |
578 | break; | |
579 | } | |
4d22de3e DLR |
580 | mk_tid_release(skb, p - td->tid_maps.tid_tab); |
581 | cxgb3_ofld_send(tdev, skb); | |
582 | p->ctx = NULL; | |
74b793e1 DLR |
583 | if (skb == td->nofail_skb) |
584 | td->nofail_skb = | |
585 | alloc_skb(sizeof(struct cpl_tid_release), | |
586 | GFP_KERNEL); | |
4d22de3e DLR |
587 | spin_lock_bh(&td->tid_release_lock); |
588 | } | |
74b793e1 | 589 | td->release_list_incomplete = (td->tid_release_list == NULL) ? 0 : 1; |
4d22de3e | 590 | spin_unlock_bh(&td->tid_release_lock); |
74b793e1 DLR |
591 | |
592 | if (!td->nofail_skb) | |
593 | td->nofail_skb = | |
594 | alloc_skb(sizeof(struct cpl_tid_release), | |
595 | GFP_KERNEL); | |
4d22de3e DLR |
596 | } |
597 | ||
598 | /* use ctx as a next pointer in the tid release list */ | |
599 | void cxgb3_queue_tid_release(struct t3cdev *tdev, unsigned int tid) | |
600 | { | |
601 | struct t3c_data *td = T3C_DATA(tdev); | |
602 | struct t3c_tid_entry *p = &td->tid_maps.tid_tab[tid]; | |
603 | ||
604 | spin_lock_bh(&td->tid_release_lock); | |
605 | p->ctx = (void *)td->tid_release_list; | |
606fcd0b | 606 | p->client = NULL; |
4d22de3e | 607 | td->tid_release_list = p; |
74b793e1 | 608 | if (!p->ctx || td->release_list_incomplete) |
4d22de3e DLR |
609 | schedule_work(&td->tid_release_task); |
610 | spin_unlock_bh(&td->tid_release_lock); | |
611 | } | |
612 | ||
613 | EXPORT_SYMBOL(cxgb3_queue_tid_release); | |
614 | ||
615 | /* | |
616 | * Remove a tid from the TID table. A client may defer processing its last | |
617 | * CPL message if it is locked at the time it arrives, and while the message | |
618 | * sits in the client's backlog the TID may be reused for another connection. | |
619 | * To handle this we atomically switch the TID association if it still points | |
620 | * to the original client context. | |
621 | */ | |
622 | void cxgb3_remove_tid(struct t3cdev *tdev, void *ctx, unsigned int tid) | |
623 | { | |
624 | struct tid_info *t = &(T3C_DATA(tdev))->tid_maps; | |
625 | ||
626 | BUG_ON(tid >= t->ntids); | |
627 | if (tdev->type == T3A) | |
628 | (void)cmpxchg(&t->tid_tab[tid].ctx, ctx, NULL); | |
629 | else { | |
630 | struct sk_buff *skb; | |
631 | ||
632 | skb = alloc_skb(sizeof(struct cpl_tid_release), GFP_ATOMIC); | |
633 | if (likely(skb)) { | |
634 | mk_tid_release(skb, tid); | |
635 | cxgb3_ofld_send(tdev, skb); | |
636 | t->tid_tab[tid].ctx = NULL; | |
637 | } else | |
638 | cxgb3_queue_tid_release(tdev, tid); | |
639 | } | |
640 | atomic_dec(&t->tids_in_use); | |
641 | } | |
642 | ||
643 | EXPORT_SYMBOL(cxgb3_remove_tid); | |
644 | ||
645 | int cxgb3_alloc_atid(struct t3cdev *tdev, struct cxgb3_client *client, | |
646 | void *ctx) | |
647 | { | |
648 | int atid = -1; | |
649 | struct tid_info *t = &(T3C_DATA(tdev))->tid_maps; | |
650 | ||
651 | spin_lock_bh(&t->atid_lock); | |
9f238486 DLR |
652 | if (t->afree && |
653 | t->atids_in_use + atomic_read(&t->tids_in_use) + MC5_MIN_TIDS <= | |
654 | t->ntids) { | |
4d22de3e DLR |
655 | union active_open_entry *p = t->afree; |
656 | ||
657 | atid = (p - t->atid_tab) + t->atid_base; | |
658 | t->afree = p->next; | |
659 | p->t3c_tid.ctx = ctx; | |
660 | p->t3c_tid.client = client; | |
661 | t->atids_in_use++; | |
662 | } | |
663 | spin_unlock_bh(&t->atid_lock); | |
664 | return atid; | |
665 | } | |
666 | ||
667 | EXPORT_SYMBOL(cxgb3_alloc_atid); | |
668 | ||
669 | int cxgb3_alloc_stid(struct t3cdev *tdev, struct cxgb3_client *client, | |
670 | void *ctx) | |
671 | { | |
672 | int stid = -1; | |
673 | struct tid_info *t = &(T3C_DATA(tdev))->tid_maps; | |
674 | ||
675 | spin_lock_bh(&t->stid_lock); | |
676 | if (t->sfree) { | |
677 | union listen_entry *p = t->sfree; | |
678 | ||
679 | stid = (p - t->stid_tab) + t->stid_base; | |
680 | t->sfree = p->next; | |
681 | p->t3c_tid.ctx = ctx; | |
682 | p->t3c_tid.client = client; | |
683 | t->stids_in_use++; | |
684 | } | |
685 | spin_unlock_bh(&t->stid_lock); | |
686 | return stid; | |
687 | } | |
688 | ||
689 | EXPORT_SYMBOL(cxgb3_alloc_stid); | |
690 | ||
5fbf816f DLR |
691 | /* Get the t3cdev associated with a net_device */ |
692 | struct t3cdev *dev2t3cdev(struct net_device *dev) | |
693 | { | |
694 | const struct port_info *pi = netdev_priv(dev); | |
695 | ||
696 | return (struct t3cdev *)pi->adapter; | |
697 | } | |
698 | ||
699 | EXPORT_SYMBOL(dev2t3cdev); | |
700 | ||
4d22de3e DLR |
701 | static int do_smt_write_rpl(struct t3cdev *dev, struct sk_buff *skb) |
702 | { | |
703 | struct cpl_smt_write_rpl *rpl = cplhdr(skb); | |
704 | ||
705 | if (rpl->status != CPL_ERR_NONE) | |
706 | printk(KERN_ERR | |
707 | "Unexpected SMT_WRITE_RPL status %u for entry %u\n", | |
708 | rpl->status, GET_TID(rpl)); | |
709 | ||
710 | return CPL_RET_BUF_DONE; | |
711 | } | |
712 | ||
713 | static int do_l2t_write_rpl(struct t3cdev *dev, struct sk_buff *skb) | |
714 | { | |
715 | struct cpl_l2t_write_rpl *rpl = cplhdr(skb); | |
716 | ||
717 | if (rpl->status != CPL_ERR_NONE) | |
718 | printk(KERN_ERR | |
719 | "Unexpected L2T_WRITE_RPL status %u for entry %u\n", | |
720 | rpl->status, GET_TID(rpl)); | |
721 | ||
722 | return CPL_RET_BUF_DONE; | |
723 | } | |
724 | ||
b881955b DLR |
725 | static int do_rte_write_rpl(struct t3cdev *dev, struct sk_buff *skb) |
726 | { | |
727 | struct cpl_rte_write_rpl *rpl = cplhdr(skb); | |
728 | ||
729 | if (rpl->status != CPL_ERR_NONE) | |
730 | printk(KERN_ERR | |
731 | "Unexpected RTE_WRITE_RPL status %u for entry %u\n", | |
732 | rpl->status, GET_TID(rpl)); | |
733 | ||
734 | return CPL_RET_BUF_DONE; | |
735 | } | |
736 | ||
4d22de3e DLR |
737 | static int do_act_open_rpl(struct t3cdev *dev, struct sk_buff *skb) |
738 | { | |
739 | struct cpl_act_open_rpl *rpl = cplhdr(skb); | |
740 | unsigned int atid = G_TID(ntohl(rpl->atid)); | |
741 | struct t3c_tid_entry *t3c_tid; | |
742 | ||
743 | t3c_tid = lookup_atid(&(T3C_DATA(dev))->tid_maps, atid); | |
606fcd0b DLR |
744 | if (t3c_tid && t3c_tid->ctx && t3c_tid->client && |
745 | t3c_tid->client->handlers && | |
4d22de3e DLR |
746 | t3c_tid->client->handlers[CPL_ACT_OPEN_RPL]) { |
747 | return t3c_tid->client->handlers[CPL_ACT_OPEN_RPL] (dev, skb, | |
748 | t3c_tid-> | |
749 | ctx); | |
750 | } else { | |
751 | printk(KERN_ERR "%s: received clientless CPL command 0x%x\n", | |
752 | dev->name, CPL_ACT_OPEN_RPL); | |
753 | return CPL_RET_BUF_DONE | CPL_RET_BAD_MSG; | |
754 | } | |
755 | } | |
756 | ||
757 | static int do_stid_rpl(struct t3cdev *dev, struct sk_buff *skb) | |
758 | { | |
759 | union opcode_tid *p = cplhdr(skb); | |
760 | unsigned int stid = G_TID(ntohl(p->opcode_tid)); | |
761 | struct t3c_tid_entry *t3c_tid; | |
762 | ||
763 | t3c_tid = lookup_stid(&(T3C_DATA(dev))->tid_maps, stid); | |
606fcd0b | 764 | if (t3c_tid && t3c_tid->ctx && t3c_tid->client->handlers && |
4d22de3e DLR |
765 | t3c_tid->client->handlers[p->opcode]) { |
766 | return t3c_tid->client->handlers[p->opcode] (dev, skb, | |
767 | t3c_tid->ctx); | |
768 | } else { | |
769 | printk(KERN_ERR "%s: received clientless CPL command 0x%x\n", | |
770 | dev->name, p->opcode); | |
771 | return CPL_RET_BUF_DONE | CPL_RET_BAD_MSG; | |
772 | } | |
773 | } | |
774 | ||
775 | static int do_hwtid_rpl(struct t3cdev *dev, struct sk_buff *skb) | |
776 | { | |
777 | union opcode_tid *p = cplhdr(skb); | |
778 | unsigned int hwtid = G_TID(ntohl(p->opcode_tid)); | |
779 | struct t3c_tid_entry *t3c_tid; | |
780 | ||
781 | t3c_tid = lookup_tid(&(T3C_DATA(dev))->tid_maps, hwtid); | |
606fcd0b | 782 | if (t3c_tid && t3c_tid->ctx && t3c_tid->client->handlers && |
4d22de3e DLR |
783 | t3c_tid->client->handlers[p->opcode]) { |
784 | return t3c_tid->client->handlers[p->opcode] | |
785 | (dev, skb, t3c_tid->ctx); | |
786 | } else { | |
787 | printk(KERN_ERR "%s: received clientless CPL command 0x%x\n", | |
788 | dev->name, p->opcode); | |
789 | return CPL_RET_BUF_DONE | CPL_RET_BAD_MSG; | |
790 | } | |
791 | } | |
792 | ||
793 | static int do_cr(struct t3cdev *dev, struct sk_buff *skb) | |
794 | { | |
795 | struct cpl_pass_accept_req *req = cplhdr(skb); | |
796 | unsigned int stid = G_PASS_OPEN_TID(ntohl(req->tos_tid)); | |
c9a6ce50 | 797 | struct tid_info *t = &(T3C_DATA(dev))->tid_maps; |
4d22de3e | 798 | struct t3c_tid_entry *t3c_tid; |
c9a6ce50 | 799 | unsigned int tid = GET_TID(req); |
4d22de3e | 800 | |
c9a6ce50 DLR |
801 | if (unlikely(tid >= t->ntids)) { |
802 | printk("%s: passive open TID %u too large\n", | |
803 | dev->name, tid); | |
804 | t3_fatal_err(tdev2adap(dev)); | |
805 | return CPL_RET_BUF_DONE; | |
806 | } | |
807 | ||
808 | t3c_tid = lookup_stid(t, stid); | |
809 | if (t3c_tid && t3c_tid->ctx && t3c_tid->client->handlers && | |
4d22de3e DLR |
810 | t3c_tid->client->handlers[CPL_PASS_ACCEPT_REQ]) { |
811 | return t3c_tid->client->handlers[CPL_PASS_ACCEPT_REQ] | |
812 | (dev, skb, t3c_tid->ctx); | |
813 | } else { | |
814 | printk(KERN_ERR "%s: received clientless CPL command 0x%x\n", | |
815 | dev->name, CPL_PASS_ACCEPT_REQ); | |
816 | return CPL_RET_BUF_DONE | CPL_RET_BAD_MSG; | |
817 | } | |
818 | } | |
819 | ||
606fcd0b DLR |
820 | /* |
821 | * Returns an sk_buff for a reply CPL message of size len. If the input | |
822 | * sk_buff has no other users it is trimmed and reused, otherwise a new buffer | |
823 | * is allocated. The input skb must be of size at least len. Note that this | |
824 | * operation does not destroy the original skb data even if it decides to reuse | |
825 | * the buffer. | |
826 | */ | |
827 | static struct sk_buff *cxgb3_get_cpl_reply_skb(struct sk_buff *skb, size_t len, | |
1f41bb3a | 828 | gfp_t gfp) |
606fcd0b DLR |
829 | { |
830 | if (likely(!skb_cloned(skb))) { | |
831 | BUG_ON(skb->len < len); | |
832 | __skb_trim(skb, len); | |
833 | skb_get(skb); | |
834 | } else { | |
835 | skb = alloc_skb(len, gfp); | |
836 | if (skb) | |
837 | __skb_put(skb, len); | |
838 | } | |
839 | return skb; | |
840 | } | |
841 | ||
4d22de3e DLR |
842 | static int do_abort_req_rss(struct t3cdev *dev, struct sk_buff *skb) |
843 | { | |
844 | union opcode_tid *p = cplhdr(skb); | |
845 | unsigned int hwtid = G_TID(ntohl(p->opcode_tid)); | |
846 | struct t3c_tid_entry *t3c_tid; | |
847 | ||
848 | t3c_tid = lookup_tid(&(T3C_DATA(dev))->tid_maps, hwtid); | |
606fcd0b | 849 | if (t3c_tid && t3c_tid->ctx && t3c_tid->client->handlers && |
4d22de3e DLR |
850 | t3c_tid->client->handlers[p->opcode]) { |
851 | return t3c_tid->client->handlers[p->opcode] | |
852 | (dev, skb, t3c_tid->ctx); | |
853 | } else { | |
854 | struct cpl_abort_req_rss *req = cplhdr(skb); | |
855 | struct cpl_abort_rpl *rpl; | |
606fcd0b DLR |
856 | struct sk_buff *reply_skb; |
857 | unsigned int tid = GET_TID(req); | |
858 | u8 cmd = req->status; | |
859 | ||
860 | if (req->status == CPL_ERR_RTX_NEG_ADVICE || | |
861 | req->status == CPL_ERR_PERSIST_NEG_ADVICE) | |
862 | goto out; | |
4d22de3e | 863 | |
606fcd0b DLR |
864 | reply_skb = cxgb3_get_cpl_reply_skb(skb, |
865 | sizeof(struct | |
866 | cpl_abort_rpl), | |
867 | GFP_ATOMIC); | |
868 | ||
869 | if (!reply_skb) { | |
4d22de3e DLR |
870 | printk("do_abort_req_rss: couldn't get skb!\n"); |
871 | goto out; | |
872 | } | |
606fcd0b DLR |
873 | reply_skb->priority = CPL_PRIORITY_DATA; |
874 | __skb_put(reply_skb, sizeof(struct cpl_abort_rpl)); | |
875 | rpl = cplhdr(reply_skb); | |
4d22de3e DLR |
876 | rpl->wr.wr_hi = |
877 | htonl(V_WR_OP(FW_WROPCODE_OFLD_HOST_ABORT_CON_RPL)); | |
606fcd0b DLR |
878 | rpl->wr.wr_lo = htonl(V_WR_TID(tid)); |
879 | OPCODE_TID(rpl) = htonl(MK_OPCODE_TID(CPL_ABORT_RPL, tid)); | |
880 | rpl->cmd = cmd; | |
881 | cxgb3_ofld_send(dev, reply_skb); | |
4d22de3e DLR |
882 | out: |
883 | return CPL_RET_BUF_DONE; | |
884 | } | |
885 | } | |
886 | ||
887 | static int do_act_establish(struct t3cdev *dev, struct sk_buff *skb) | |
888 | { | |
889 | struct cpl_act_establish *req = cplhdr(skb); | |
890 | unsigned int atid = G_PASS_OPEN_TID(ntohl(req->tos_tid)); | |
c9a6ce50 | 891 | struct tid_info *t = &(T3C_DATA(dev))->tid_maps; |
4d22de3e | 892 | struct t3c_tid_entry *t3c_tid; |
c9a6ce50 | 893 | unsigned int tid = GET_TID(req); |
4d22de3e | 894 | |
c9a6ce50 DLR |
895 | if (unlikely(tid >= t->ntids)) { |
896 | printk("%s: active establish TID %u too large\n", | |
897 | dev->name, tid); | |
898 | t3_fatal_err(tdev2adap(dev)); | |
899 | return CPL_RET_BUF_DONE; | |
900 | } | |
901 | ||
902 | t3c_tid = lookup_atid(t, atid); | |
606fcd0b | 903 | if (t3c_tid && t3c_tid->ctx && t3c_tid->client->handlers && |
4d22de3e DLR |
904 | t3c_tid->client->handlers[CPL_ACT_ESTABLISH]) { |
905 | return t3c_tid->client->handlers[CPL_ACT_ESTABLISH] | |
906 | (dev, skb, t3c_tid->ctx); | |
907 | } else { | |
908 | printk(KERN_ERR "%s: received clientless CPL command 0x%x\n", | |
c9a6ce50 | 909 | dev->name, CPL_ACT_ESTABLISH); |
4d22de3e DLR |
910 | return CPL_RET_BUF_DONE | CPL_RET_BAD_MSG; |
911 | } | |
912 | } | |
913 | ||
4d22de3e DLR |
914 | static int do_trace(struct t3cdev *dev, struct sk_buff *skb) |
915 | { | |
916 | struct cpl_trace_pkt *p = cplhdr(skb); | |
917 | ||
b5344972 | 918 | skb->protocol = htons(0xffff); |
4d22de3e DLR |
919 | skb->dev = dev->lldev; |
920 | skb_pull(skb, sizeof(*p)); | |
459a98ed | 921 | skb_reset_mac_header(skb); |
4d22de3e DLR |
922 | netif_receive_skb(skb); |
923 | return 0; | |
924 | } | |
925 | ||
fa3a6cb4 AV |
926 | /* |
927 | * That skb would better have come from process_responses() where we abuse | |
928 | * ->priority and ->csum to carry our data. NB: if we get to per-arch | |
929 | * ->csum, the things might get really interesting here. | |
930 | */ | |
931 | ||
932 | static inline u32 get_hwtid(struct sk_buff *skb) | |
933 | { | |
934 | return ntohl((__force __be32)skb->priority) >> 8 & 0xfffff; | |
935 | } | |
936 | ||
937 | static inline u32 get_opcode(struct sk_buff *skb) | |
938 | { | |
939 | return G_OPCODE(ntohl((__force __be32)skb->csum)); | |
940 | } | |
941 | ||
4d22de3e DLR |
942 | static int do_term(struct t3cdev *dev, struct sk_buff *skb) |
943 | { | |
fa3a6cb4 AV |
944 | unsigned int hwtid = get_hwtid(skb); |
945 | unsigned int opcode = get_opcode(skb); | |
4d22de3e DLR |
946 | struct t3c_tid_entry *t3c_tid; |
947 | ||
948 | t3c_tid = lookup_tid(&(T3C_DATA(dev))->tid_maps, hwtid); | |
606fcd0b | 949 | if (t3c_tid && t3c_tid->ctx && t3c_tid->client->handlers && |
4d22de3e DLR |
950 | t3c_tid->client->handlers[opcode]) { |
951 | return t3c_tid->client->handlers[opcode] (dev, skb, | |
952 | t3c_tid->ctx); | |
953 | } else { | |
954 | printk(KERN_ERR "%s: received clientless CPL command 0x%x\n", | |
955 | dev->name, opcode); | |
956 | return CPL_RET_BUF_DONE | CPL_RET_BAD_MSG; | |
957 | } | |
958 | } | |
959 | ||
960 | static int nb_callback(struct notifier_block *self, unsigned long event, | |
961 | void *ctx) | |
962 | { | |
963 | switch (event) { | |
964 | case (NETEVENT_NEIGH_UPDATE):{ | |
965 | cxgb_neigh_update((struct neighbour *)ctx); | |
966 | break; | |
967 | } | |
4d22de3e DLR |
968 | case (NETEVENT_REDIRECT):{ |
969 | struct netevent_redirect *nr = ctx; | |
970 | cxgb_redirect(nr->old, nr->new); | |
69cce1d1 | 971 | cxgb_neigh_update(dst_get_neighbour(nr->new)); |
4d22de3e DLR |
972 | break; |
973 | } | |
974 | default: | |
975 | break; | |
976 | } | |
977 | return 0; | |
978 | } | |
979 | ||
980 | static struct notifier_block nb = { | |
981 | .notifier_call = nb_callback | |
982 | }; | |
983 | ||
984 | /* | |
985 | * Process a received packet with an unknown/unexpected CPL opcode. | |
986 | */ | |
987 | static int do_bad_cpl(struct t3cdev *dev, struct sk_buff *skb) | |
988 | { | |
989 | printk(KERN_ERR "%s: received bad CPL command 0x%x\n", dev->name, | |
990 | *skb->data); | |
991 | return CPL_RET_BUF_DONE | CPL_RET_BAD_MSG; | |
992 | } | |
993 | ||
994 | /* | |
995 | * Handlers for each CPL opcode | |
996 | */ | |
997 | static cpl_handler_func cpl_handlers[NUM_CPL_CMDS]; | |
998 | ||
999 | /* | |
1000 | * Add a new handler to the CPL dispatch table. A NULL handler may be supplied | |
1001 | * to unregister an existing handler. | |
1002 | */ | |
1003 | void t3_register_cpl_handler(unsigned int opcode, cpl_handler_func h) | |
1004 | { | |
1005 | if (opcode < NUM_CPL_CMDS) | |
1006 | cpl_handlers[opcode] = h ? h : do_bad_cpl; | |
1007 | else | |
1008 | printk(KERN_ERR "T3C: handler registration for " | |
1009 | "opcode %x failed\n", opcode); | |
1010 | } | |
1011 | ||
1012 | EXPORT_SYMBOL(t3_register_cpl_handler); | |
1013 | ||
1014 | /* | |
1015 | * T3CDEV's receive method. | |
1016 | */ | |
a5190b4e | 1017 | static int process_rx(struct t3cdev *dev, struct sk_buff **skbs, int n) |
4d22de3e DLR |
1018 | { |
1019 | while (n--) { | |
1020 | struct sk_buff *skb = *skbs++; | |
fa3a6cb4 | 1021 | unsigned int opcode = get_opcode(skb); |
4d22de3e DLR |
1022 | int ret = cpl_handlers[opcode] (dev, skb); |
1023 | ||
1024 | #if VALIDATE_TID | |
1025 | if (ret & CPL_RET_UNKNOWN_TID) { | |
1026 | union opcode_tid *p = cplhdr(skb); | |
1027 | ||
1028 | printk(KERN_ERR "%s: CPL message (opcode %u) had " | |
1029 | "unknown TID %u\n", dev->name, opcode, | |
1030 | G_TID(ntohl(p->opcode_tid))); | |
1031 | } | |
1032 | #endif | |
1033 | if (ret & CPL_RET_BUF_DONE) | |
1034 | kfree_skb(skb); | |
1035 | } | |
1036 | return 0; | |
1037 | } | |
1038 | ||
1039 | /* | |
1040 | * Sends an sk_buff to a T3C driver after dealing with any active network taps. | |
1041 | */ | |
1042 | int cxgb3_ofld_send(struct t3cdev *dev, struct sk_buff *skb) | |
1043 | { | |
1044 | int r; | |
1045 | ||
1046 | local_bh_disable(); | |
1047 | r = dev->send(dev, skb); | |
1048 | local_bh_enable(); | |
1049 | return r; | |
1050 | } | |
1051 | ||
1052 | EXPORT_SYMBOL(cxgb3_ofld_send); | |
1053 | ||
1054 | static int is_offloading(struct net_device *dev) | |
1055 | { | |
1056 | struct adapter *adapter; | |
1057 | int i; | |
1058 | ||
1059 | read_lock_bh(&adapter_list_lock); | |
1060 | list_for_each_entry(adapter, &adapter_list, adapter_list) { | |
1061 | for_each_port(adapter, i) { | |
1062 | if (dev == adapter->port[i]) { | |
1063 | read_unlock_bh(&adapter_list_lock); | |
1064 | return 1; | |
1065 | } | |
1066 | } | |
1067 | } | |
1068 | read_unlock_bh(&adapter_list_lock); | |
1069 | return 0; | |
1070 | } | |
1071 | ||
a5190b4e | 1072 | static void cxgb_neigh_update(struct neighbour *neigh) |
4d22de3e DLR |
1073 | { |
1074 | struct net_device *dev = neigh->dev; | |
1075 | ||
1076 | if (dev && (is_offloading(dev))) { | |
5fbf816f | 1077 | struct t3cdev *tdev = dev2t3cdev(dev); |
4d22de3e DLR |
1078 | |
1079 | BUG_ON(!tdev); | |
1080 | t3_l2t_update(tdev, neigh); | |
1081 | } | |
1082 | } | |
1083 | ||
1084 | static void set_l2t_ix(struct t3cdev *tdev, u32 tid, struct l2t_entry *e) | |
1085 | { | |
1086 | struct sk_buff *skb; | |
1087 | struct cpl_set_tcb_field *req; | |
1088 | ||
1089 | skb = alloc_skb(sizeof(*req), GFP_ATOMIC); | |
1090 | if (!skb) { | |
b39d66a8 | 1091 | printk(KERN_ERR "%s: cannot allocate skb!\n", __func__); |
4d22de3e DLR |
1092 | return; |
1093 | } | |
1094 | skb->priority = CPL_PRIORITY_CONTROL; | |
1095 | req = (struct cpl_set_tcb_field *)skb_put(skb, sizeof(*req)); | |
1096 | req->wr.wr_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD)); | |
1097 | OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, tid)); | |
1098 | req->reply = 0; | |
1099 | req->cpu_idx = 0; | |
1100 | req->word = htons(W_TCB_L2T_IX); | |
1101 | req->mask = cpu_to_be64(V_TCB_L2T_IX(M_TCB_L2T_IX)); | |
1102 | req->val = cpu_to_be64(V_TCB_L2T_IX(e->idx)); | |
1103 | tdev->send(tdev, skb); | |
1104 | } | |
1105 | ||
a5190b4e | 1106 | static void cxgb_redirect(struct dst_entry *old, struct dst_entry *new) |
4d22de3e DLR |
1107 | { |
1108 | struct net_device *olddev, *newdev; | |
1109 | struct tid_info *ti; | |
1110 | struct t3cdev *tdev; | |
1111 | u32 tid; | |
1112 | int update_tcb; | |
1113 | struct l2t_entry *e; | |
1114 | struct t3c_tid_entry *te; | |
1115 | ||
69cce1d1 DM |
1116 | olddev = dst_get_neighbour(old)->dev; |
1117 | newdev = dst_get_neighbour(new)->dev; | |
4d22de3e DLR |
1118 | if (!is_offloading(olddev)) |
1119 | return; | |
1120 | if (!is_offloading(newdev)) { | |
f07b2e40 | 1121 | printk(KERN_WARNING "%s: Redirect to non-offload " |
b39d66a8 | 1122 | "device ignored.\n", __func__); |
4d22de3e DLR |
1123 | return; |
1124 | } | |
5fbf816f | 1125 | tdev = dev2t3cdev(olddev); |
4d22de3e | 1126 | BUG_ON(!tdev); |
5fbf816f | 1127 | if (tdev != dev2t3cdev(newdev)) { |
4d22de3e | 1128 | printk(KERN_WARNING "%s: Redirect to different " |
b39d66a8 | 1129 | "offload device ignored.\n", __func__); |
4d22de3e DLR |
1130 | return; |
1131 | } | |
1132 | ||
1133 | /* Add new L2T entry */ | |
69cce1d1 | 1134 | e = t3_l2t_get(tdev, dst_get_neighbour(new), newdev); |
4d22de3e DLR |
1135 | if (!e) { |
1136 | printk(KERN_ERR "%s: couldn't allocate new l2t entry!\n", | |
b39d66a8 | 1137 | __func__); |
4d22de3e DLR |
1138 | return; |
1139 | } | |
1140 | ||
1141 | /* Walk tid table and notify clients of dst change. */ | |
1142 | ti = &(T3C_DATA(tdev))->tid_maps; | |
1143 | for (tid = 0; tid < ti->ntids; tid++) { | |
1144 | te = lookup_tid(ti, tid); | |
1145 | BUG_ON(!te); | |
606fcd0b | 1146 | if (te && te->ctx && te->client && te->client->redirect) { |
4d22de3e DLR |
1147 | update_tcb = te->client->redirect(te->ctx, old, new, e); |
1148 | if (update_tcb) { | |
e48f129c | 1149 | rcu_read_lock(); |
4d22de3e | 1150 | l2t_hold(L2DATA(tdev), e); |
e48f129c | 1151 | rcu_read_unlock(); |
4d22de3e DLR |
1152 | set_l2t_ix(tdev, tid, e); |
1153 | } | |
1154 | } | |
1155 | } | |
e48f129c | 1156 | l2t_release(tdev, e); |
4d22de3e DLR |
1157 | } |
1158 | ||
1159 | /* | |
1160 | * Allocate a chunk of memory using kmalloc or, if that fails, vmalloc. | |
1161 | * The allocated memory is cleared. | |
1162 | */ | |
1163 | void *cxgb_alloc_mem(unsigned long size) | |
1164 | { | |
89bf67f1 | 1165 | void *p = kzalloc(size, GFP_KERNEL); |
4d22de3e DLR |
1166 | |
1167 | if (!p) | |
89bf67f1 | 1168 | p = vzalloc(size); |
4d22de3e DLR |
1169 | return p; |
1170 | } | |
1171 | ||
1172 | /* | |
1173 | * Free memory allocated through t3_alloc_mem(). | |
1174 | */ | |
1175 | void cxgb_free_mem(void *addr) | |
1176 | { | |
9e2779fa | 1177 | if (is_vmalloc_addr(addr)) |
4d22de3e DLR |
1178 | vfree(addr); |
1179 | else | |
1180 | kfree(addr); | |
1181 | } | |
1182 | ||
1183 | /* | |
1184 | * Allocate and initialize the TID tables. Returns 0 on success. | |
1185 | */ | |
1186 | static int init_tid_tabs(struct tid_info *t, unsigned int ntids, | |
1187 | unsigned int natids, unsigned int nstids, | |
1188 | unsigned int atid_base, unsigned int stid_base) | |
1189 | { | |
1190 | unsigned long size = ntids * sizeof(*t->tid_tab) + | |
1191 | natids * sizeof(*t->atid_tab) + nstids * sizeof(*t->stid_tab); | |
1192 | ||
1193 | t->tid_tab = cxgb_alloc_mem(size); | |
1194 | if (!t->tid_tab) | |
1195 | return -ENOMEM; | |
1196 | ||
1197 | t->stid_tab = (union listen_entry *)&t->tid_tab[ntids]; | |
1198 | t->atid_tab = (union active_open_entry *)&t->stid_tab[nstids]; | |
1199 | t->ntids = ntids; | |
1200 | t->nstids = nstids; | |
1201 | t->stid_base = stid_base; | |
1202 | t->sfree = NULL; | |
1203 | t->natids = natids; | |
1204 | t->atid_base = atid_base; | |
1205 | t->afree = NULL; | |
1206 | t->stids_in_use = t->atids_in_use = 0; | |
1207 | atomic_set(&t->tids_in_use, 0); | |
1208 | spin_lock_init(&t->stid_lock); | |
1209 | spin_lock_init(&t->atid_lock); | |
1210 | ||
1211 | /* | |
1212 | * Setup the free lists for stid_tab and atid_tab. | |
1213 | */ | |
1214 | if (nstids) { | |
1215 | while (--nstids) | |
1216 | t->stid_tab[nstids - 1].next = &t->stid_tab[nstids]; | |
1217 | t->sfree = t->stid_tab; | |
1218 | } | |
1219 | if (natids) { | |
1220 | while (--natids) | |
1221 | t->atid_tab[natids - 1].next = &t->atid_tab[natids]; | |
1222 | t->afree = t->atid_tab; | |
1223 | } | |
1224 | return 0; | |
1225 | } | |
1226 | ||
1227 | static void free_tid_maps(struct tid_info *t) | |
1228 | { | |
1229 | cxgb_free_mem(t->tid_tab); | |
1230 | } | |
1231 | ||
1232 | static inline void add_adapter(struct adapter *adap) | |
1233 | { | |
1234 | write_lock_bh(&adapter_list_lock); | |
1235 | list_add_tail(&adap->adapter_list, &adapter_list); | |
1236 | write_unlock_bh(&adapter_list_lock); | |
1237 | } | |
1238 | ||
1239 | static inline void remove_adapter(struct adapter *adap) | |
1240 | { | |
1241 | write_lock_bh(&adapter_list_lock); | |
1242 | list_del(&adap->adapter_list); | |
1243 | write_unlock_bh(&adapter_list_lock); | |
1244 | } | |
1245 | ||
1246 | int cxgb3_offload_activate(struct adapter *adapter) | |
1247 | { | |
1248 | struct t3cdev *dev = &adapter->tdev; | |
1249 | int natids, err; | |
1250 | struct t3c_data *t; | |
1251 | struct tid_range stid_range, tid_range; | |
1252 | struct mtutab mtutab; | |
1253 | unsigned int l2t_capacity; | |
1254 | ||
75ed0a89 | 1255 | t = kzalloc(sizeof(*t), GFP_KERNEL); |
4d22de3e DLR |
1256 | if (!t) |
1257 | return -ENOMEM; | |
1258 | ||
1259 | err = -EOPNOTSUPP; | |
1260 | if (dev->ctl(dev, GET_TX_MAX_CHUNK, &t->tx_max_chunk) < 0 || | |
1261 | dev->ctl(dev, GET_MAX_OUTSTANDING_WR, &t->max_wrs) < 0 || | |
1262 | dev->ctl(dev, GET_L2T_CAPACITY, &l2t_capacity) < 0 || | |
1263 | dev->ctl(dev, GET_MTUS, &mtutab) < 0 || | |
1264 | dev->ctl(dev, GET_TID_RANGE, &tid_range) < 0 || | |
1265 | dev->ctl(dev, GET_STID_RANGE, &stid_range) < 0) | |
1266 | goto out_free; | |
1267 | ||
1268 | err = -ENOMEM; | |
e48f129c | 1269 | RCU_INIT_POINTER(dev->l2opt, t3_init_l2t(l2t_capacity)); |
4d22de3e DLR |
1270 | if (!L2DATA(dev)) |
1271 | goto out_free; | |
1272 | ||
1273 | natids = min(tid_range.num / 2, MAX_ATIDS); | |
1274 | err = init_tid_tabs(&t->tid_maps, tid_range.num, natids, | |
1275 | stid_range.num, ATID_BASE, stid_range.base); | |
1276 | if (err) | |
1277 | goto out_free_l2t; | |
1278 | ||
1279 | t->mtus = mtutab.mtus; | |
1280 | t->nmtus = mtutab.size; | |
1281 | ||
1282 | INIT_WORK(&t->tid_release_task, t3_process_tid_release_list); | |
1283 | spin_lock_init(&t->tid_release_lock); | |
1284 | INIT_LIST_HEAD(&t->list_node); | |
1285 | t->dev = dev; | |
1286 | ||
1287 | T3C_DATA(dev) = t; | |
1288 | dev->recv = process_rx; | |
1289 | dev->neigh_update = t3_l2t_update; | |
1290 | ||
1291 | /* Register netevent handler once */ | |
1292 | if (list_empty(&adapter_list)) | |
1293 | register_netevent_notifier(&nb); | |
1294 | ||
74b793e1 DLR |
1295 | t->nofail_skb = alloc_skb(sizeof(struct cpl_tid_release), GFP_KERNEL); |
1296 | t->release_list_incomplete = 0; | |
1297 | ||
4d22de3e DLR |
1298 | add_adapter(adapter); |
1299 | return 0; | |
1300 | ||
1301 | out_free_l2t: | |
1302 | t3_free_l2t(L2DATA(dev)); | |
e48f129c | 1303 | rcu_assign_pointer(dev->l2opt, NULL); |
4d22de3e DLR |
1304 | out_free: |
1305 | kfree(t); | |
1306 | return err; | |
1307 | } | |
1308 | ||
e48f129c NH |
1309 | static void clean_l2_data(struct rcu_head *head) |
1310 | { | |
1311 | struct l2t_data *d = container_of(head, struct l2t_data, rcu_head); | |
1312 | t3_free_l2t(d); | |
1313 | } | |
1314 | ||
1315 | ||
4d22de3e DLR |
1316 | void cxgb3_offload_deactivate(struct adapter *adapter) |
1317 | { | |
1318 | struct t3cdev *tdev = &adapter->tdev; | |
1319 | struct t3c_data *t = T3C_DATA(tdev); | |
e48f129c | 1320 | struct l2t_data *d; |
4d22de3e DLR |
1321 | |
1322 | remove_adapter(adapter); | |
1323 | if (list_empty(&adapter_list)) | |
1324 | unregister_netevent_notifier(&nb); | |
1325 | ||
1326 | free_tid_maps(&t->tid_maps); | |
1327 | T3C_DATA(tdev) = NULL; | |
e48f129c NH |
1328 | rcu_read_lock(); |
1329 | d = L2DATA(tdev); | |
1330 | rcu_read_unlock(); | |
1331 | rcu_assign_pointer(tdev->l2opt, NULL); | |
1332 | call_rcu(&d->rcu_head, clean_l2_data); | |
74b793e1 DLR |
1333 | if (t->nofail_skb) |
1334 | kfree_skb(t->nofail_skb); | |
4d22de3e DLR |
1335 | kfree(t); |
1336 | } | |
1337 | ||
1338 | static inline void register_tdev(struct t3cdev *tdev) | |
1339 | { | |
1340 | static int unit; | |
1341 | ||
1342 | mutex_lock(&cxgb3_db_lock); | |
1343 | snprintf(tdev->name, sizeof(tdev->name), "ofld_dev%d", unit++); | |
1344 | list_add_tail(&tdev->ofld_dev_list, &ofld_dev_list); | |
1345 | mutex_unlock(&cxgb3_db_lock); | |
1346 | } | |
1347 | ||
1348 | static inline void unregister_tdev(struct t3cdev *tdev) | |
1349 | { | |
1350 | mutex_lock(&cxgb3_db_lock); | |
1351 | list_del(&tdev->ofld_dev_list); | |
1352 | mutex_unlock(&cxgb3_db_lock); | |
1353 | } | |
1354 | ||
8f85cd7f DLR |
1355 | static inline int adap2type(struct adapter *adapter) |
1356 | { | |
1357 | int type = 0; | |
1358 | ||
1359 | switch (adapter->params.rev) { | |
1360 | case T3_REV_A: | |
1361 | type = T3A; | |
1362 | break; | |
1363 | case T3_REV_B: | |
1364 | case T3_REV_B2: | |
1365 | type = T3B; | |
1366 | break; | |
1367 | case T3_REV_C: | |
1368 | type = T3C; | |
1369 | break; | |
1370 | } | |
1371 | return type; | |
1372 | } | |
1373 | ||
4d22de3e DLR |
1374 | void __devinit cxgb3_adapter_ofld(struct adapter *adapter) |
1375 | { | |
1376 | struct t3cdev *tdev = &adapter->tdev; | |
1377 | ||
1378 | INIT_LIST_HEAD(&tdev->ofld_dev_list); | |
1379 | ||
1380 | cxgb3_set_dummy_ops(tdev); | |
1381 | tdev->send = t3_offload_tx; | |
1382 | tdev->ctl = cxgb_offload_ctl; | |
8f85cd7f | 1383 | tdev->type = adap2type(adapter); |
4d22de3e DLR |
1384 | |
1385 | register_tdev(tdev); | |
1386 | } | |
1387 | ||
1388 | void __devexit cxgb3_adapter_unofld(struct adapter *adapter) | |
1389 | { | |
1390 | struct t3cdev *tdev = &adapter->tdev; | |
1391 | ||
1392 | tdev->recv = NULL; | |
1393 | tdev->neigh_update = NULL; | |
1394 | ||
1395 | unregister_tdev(tdev); | |
1396 | } | |
1397 | ||
1398 | void __init cxgb3_offload_init(void) | |
1399 | { | |
1400 | int i; | |
1401 | ||
1402 | for (i = 0; i < NUM_CPL_CMDS; ++i) | |
1403 | cpl_handlers[i] = do_bad_cpl; | |
1404 | ||
1405 | t3_register_cpl_handler(CPL_SMT_WRITE_RPL, do_smt_write_rpl); | |
1406 | t3_register_cpl_handler(CPL_L2T_WRITE_RPL, do_l2t_write_rpl); | |
b881955b | 1407 | t3_register_cpl_handler(CPL_RTE_WRITE_RPL, do_rte_write_rpl); |
4d22de3e DLR |
1408 | t3_register_cpl_handler(CPL_PASS_OPEN_RPL, do_stid_rpl); |
1409 | t3_register_cpl_handler(CPL_CLOSE_LISTSRV_RPL, do_stid_rpl); | |
1410 | t3_register_cpl_handler(CPL_PASS_ACCEPT_REQ, do_cr); | |
1411 | t3_register_cpl_handler(CPL_PASS_ESTABLISH, do_hwtid_rpl); | |
1412 | t3_register_cpl_handler(CPL_ABORT_RPL_RSS, do_hwtid_rpl); | |
1413 | t3_register_cpl_handler(CPL_ABORT_RPL, do_hwtid_rpl); | |
1414 | t3_register_cpl_handler(CPL_RX_URG_NOTIFY, do_hwtid_rpl); | |
1415 | t3_register_cpl_handler(CPL_RX_DATA, do_hwtid_rpl); | |
1416 | t3_register_cpl_handler(CPL_TX_DATA_ACK, do_hwtid_rpl); | |
1417 | t3_register_cpl_handler(CPL_TX_DMA_ACK, do_hwtid_rpl); | |
1418 | t3_register_cpl_handler(CPL_ACT_OPEN_RPL, do_act_open_rpl); | |
1419 | t3_register_cpl_handler(CPL_PEER_CLOSE, do_hwtid_rpl); | |
1420 | t3_register_cpl_handler(CPL_CLOSE_CON_RPL, do_hwtid_rpl); | |
1421 | t3_register_cpl_handler(CPL_ABORT_REQ_RSS, do_abort_req_rss); | |
1422 | t3_register_cpl_handler(CPL_ACT_ESTABLISH, do_act_establish); | |
6cdbd77e DLR |
1423 | t3_register_cpl_handler(CPL_SET_TCB_RPL, do_hwtid_rpl); |
1424 | t3_register_cpl_handler(CPL_GET_TCB_RPL, do_hwtid_rpl); | |
4d22de3e DLR |
1425 | t3_register_cpl_handler(CPL_RDMA_TERMINATE, do_term); |
1426 | t3_register_cpl_handler(CPL_RDMA_EC_STATUS, do_hwtid_rpl); | |
1427 | t3_register_cpl_handler(CPL_TRACE_PKT, do_trace); | |
1428 | t3_register_cpl_handler(CPL_RX_DATA_DDP, do_hwtid_rpl); | |
1429 | t3_register_cpl_handler(CPL_RX_DDP_COMPLETE, do_hwtid_rpl); | |
1430 | t3_register_cpl_handler(CPL_ISCSI_HDR, do_hwtid_rpl); | |
1431 | } |