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1 | /* | |
2 | * Copyright 2008 Cisco Systems, Inc. All rights reserved. | |
3 | * Copyright 2007 Nuova Systems, Inc. All rights reserved. | |
4 | * | |
5 | * This program is free software; you may redistribute it and/or modify | |
6 | * it under the terms of the GNU General Public License as published by | |
7 | * the Free Software Foundation; version 2 of the License. | |
8 | * | |
9 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, | |
10 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF | |
11 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND | |
12 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS | |
13 | * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN | |
14 | * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN | |
15 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | |
16 | * SOFTWARE. | |
17 | * | |
18 | */ | |
19 | ||
20 | #include <linux/module.h> | |
21 | #include <linux/kernel.h> | |
22 | #include <linux/string.h> | |
23 | #include <linux/errno.h> | |
24 | #include <linux/types.h> | |
25 | #include <linux/init.h> | |
26 | #include <linux/workqueue.h> | |
27 | #include <linux/pci.h> | |
28 | #include <linux/netdevice.h> | |
29 | #include <linux/etherdevice.h> | |
30 | #include <linux/if_ether.h> | |
31 | #include <linux/if_vlan.h> | |
32 | #include <linux/ethtool.h> | |
33 | #include <linux/in.h> | |
34 | #include <linux/ip.h> | |
35 | #include <linux/ipv6.h> | |
36 | #include <linux/tcp.h> | |
37 | #include <net/ip6_checksum.h> | |
38 | ||
39 | #include "cq_enet_desc.h" | |
40 | #include "vnic_dev.h" | |
41 | #include "vnic_intr.h" | |
42 | #include "vnic_stats.h" | |
43 | #include "enic_res.h" | |
44 | #include "enic.h" | |
45 | ||
46 | #define ENIC_NOTIFY_TIMER_PERIOD (2 * HZ) | |
47 | ||
48 | /* Supported devices */ | |
49 | static struct pci_device_id enic_id_table[] = { | |
50 | { PCI_VDEVICE(CISCO, 0x0043) }, | |
51 | { 0, } /* end of table */ | |
52 | }; | |
53 | ||
54 | MODULE_DESCRIPTION(DRV_DESCRIPTION); | |
55 | MODULE_AUTHOR("Scott Feldman <scofeldm@cisco.com>"); | |
56 | MODULE_LICENSE("GPL"); | |
57 | MODULE_VERSION(DRV_VERSION); | |
58 | MODULE_DEVICE_TABLE(pci, enic_id_table); | |
59 | ||
60 | struct enic_stat { | |
61 | char name[ETH_GSTRING_LEN]; | |
62 | unsigned int offset; | |
63 | }; | |
64 | ||
65 | #define ENIC_TX_STAT(stat) \ | |
66 | { .name = #stat, .offset = offsetof(struct vnic_tx_stats, stat) / 8 } | |
67 | #define ENIC_RX_STAT(stat) \ | |
68 | { .name = #stat, .offset = offsetof(struct vnic_rx_stats, stat) / 8 } | |
69 | ||
70 | static const struct enic_stat enic_tx_stats[] = { | |
71 | ENIC_TX_STAT(tx_frames_ok), | |
72 | ENIC_TX_STAT(tx_unicast_frames_ok), | |
73 | ENIC_TX_STAT(tx_multicast_frames_ok), | |
74 | ENIC_TX_STAT(tx_broadcast_frames_ok), | |
75 | ENIC_TX_STAT(tx_bytes_ok), | |
76 | ENIC_TX_STAT(tx_unicast_bytes_ok), | |
77 | ENIC_TX_STAT(tx_multicast_bytes_ok), | |
78 | ENIC_TX_STAT(tx_broadcast_bytes_ok), | |
79 | ENIC_TX_STAT(tx_drops), | |
80 | ENIC_TX_STAT(tx_errors), | |
81 | ENIC_TX_STAT(tx_tso), | |
82 | }; | |
83 | ||
84 | static const struct enic_stat enic_rx_stats[] = { | |
85 | ENIC_RX_STAT(rx_frames_ok), | |
86 | ENIC_RX_STAT(rx_frames_total), | |
87 | ENIC_RX_STAT(rx_unicast_frames_ok), | |
88 | ENIC_RX_STAT(rx_multicast_frames_ok), | |
89 | ENIC_RX_STAT(rx_broadcast_frames_ok), | |
90 | ENIC_RX_STAT(rx_bytes_ok), | |
91 | ENIC_RX_STAT(rx_unicast_bytes_ok), | |
92 | ENIC_RX_STAT(rx_multicast_bytes_ok), | |
93 | ENIC_RX_STAT(rx_broadcast_bytes_ok), | |
94 | ENIC_RX_STAT(rx_drop), | |
95 | ENIC_RX_STAT(rx_no_bufs), | |
96 | ENIC_RX_STAT(rx_errors), | |
97 | ENIC_RX_STAT(rx_rss), | |
98 | ENIC_RX_STAT(rx_crc_errors), | |
99 | ENIC_RX_STAT(rx_frames_64), | |
100 | ENIC_RX_STAT(rx_frames_127), | |
101 | ENIC_RX_STAT(rx_frames_255), | |
102 | ENIC_RX_STAT(rx_frames_511), | |
103 | ENIC_RX_STAT(rx_frames_1023), | |
104 | ENIC_RX_STAT(rx_frames_1518), | |
105 | ENIC_RX_STAT(rx_frames_to_max), | |
106 | }; | |
107 | ||
108 | static const unsigned int enic_n_tx_stats = ARRAY_SIZE(enic_tx_stats); | |
109 | static const unsigned int enic_n_rx_stats = ARRAY_SIZE(enic_rx_stats); | |
110 | ||
111 | static int enic_get_settings(struct net_device *netdev, | |
112 | struct ethtool_cmd *ecmd) | |
113 | { | |
114 | struct enic *enic = netdev_priv(netdev); | |
115 | ||
116 | ecmd->supported = (SUPPORTED_10000baseT_Full | SUPPORTED_FIBRE); | |
117 | ecmd->advertising = (ADVERTISED_10000baseT_Full | ADVERTISED_FIBRE); | |
118 | ecmd->port = PORT_FIBRE; | |
119 | ecmd->transceiver = XCVR_EXTERNAL; | |
120 | ||
121 | if (netif_carrier_ok(netdev)) { | |
122 | ecmd->speed = vnic_dev_port_speed(enic->vdev); | |
123 | ecmd->duplex = DUPLEX_FULL; | |
124 | } else { | |
125 | ecmd->speed = -1; | |
126 | ecmd->duplex = -1; | |
127 | } | |
128 | ||
129 | ecmd->autoneg = AUTONEG_DISABLE; | |
130 | ||
131 | return 0; | |
132 | } | |
133 | ||
134 | static void enic_get_drvinfo(struct net_device *netdev, | |
135 | struct ethtool_drvinfo *drvinfo) | |
136 | { | |
137 | struct enic *enic = netdev_priv(netdev); | |
138 | struct vnic_devcmd_fw_info *fw_info; | |
139 | ||
140 | spin_lock(&enic->devcmd_lock); | |
141 | vnic_dev_fw_info(enic->vdev, &fw_info); | |
142 | spin_unlock(&enic->devcmd_lock); | |
143 | ||
144 | strncpy(drvinfo->driver, DRV_NAME, sizeof(drvinfo->driver)); | |
145 | strncpy(drvinfo->version, DRV_VERSION, sizeof(drvinfo->version)); | |
146 | strncpy(drvinfo->fw_version, fw_info->fw_version, | |
147 | sizeof(drvinfo->fw_version)); | |
148 | strncpy(drvinfo->bus_info, pci_name(enic->pdev), | |
149 | sizeof(drvinfo->bus_info)); | |
150 | } | |
151 | ||
152 | static void enic_get_strings(struct net_device *netdev, u32 stringset, u8 *data) | |
153 | { | |
154 | unsigned int i; | |
155 | ||
156 | switch (stringset) { | |
157 | case ETH_SS_STATS: | |
158 | for (i = 0; i < enic_n_tx_stats; i++) { | |
159 | memcpy(data, enic_tx_stats[i].name, ETH_GSTRING_LEN); | |
160 | data += ETH_GSTRING_LEN; | |
161 | } | |
162 | for (i = 0; i < enic_n_rx_stats; i++) { | |
163 | memcpy(data, enic_rx_stats[i].name, ETH_GSTRING_LEN); | |
164 | data += ETH_GSTRING_LEN; | |
165 | } | |
166 | break; | |
167 | } | |
168 | } | |
169 | ||
170 | static int enic_get_sset_count(struct net_device *netdev, int sset) | |
171 | { | |
172 | switch (sset) { | |
173 | case ETH_SS_STATS: | |
174 | return enic_n_tx_stats + enic_n_rx_stats; | |
175 | default: | |
176 | return -EOPNOTSUPP; | |
177 | } | |
178 | } | |
179 | ||
180 | static void enic_get_ethtool_stats(struct net_device *netdev, | |
181 | struct ethtool_stats *stats, u64 *data) | |
182 | { | |
183 | struct enic *enic = netdev_priv(netdev); | |
184 | struct vnic_stats *vstats; | |
185 | unsigned int i; | |
186 | ||
187 | spin_lock(&enic->devcmd_lock); | |
188 | vnic_dev_stats_dump(enic->vdev, &vstats); | |
189 | spin_unlock(&enic->devcmd_lock); | |
190 | ||
191 | for (i = 0; i < enic_n_tx_stats; i++) | |
192 | *(data++) = ((u64 *)&vstats->tx)[enic_tx_stats[i].offset]; | |
193 | for (i = 0; i < enic_n_rx_stats; i++) | |
194 | *(data++) = ((u64 *)&vstats->rx)[enic_rx_stats[i].offset]; | |
195 | } | |
196 | ||
197 | static u32 enic_get_rx_csum(struct net_device *netdev) | |
198 | { | |
199 | struct enic *enic = netdev_priv(netdev); | |
200 | return enic->csum_rx_enabled; | |
201 | } | |
202 | ||
203 | static int enic_set_rx_csum(struct net_device *netdev, u32 data) | |
204 | { | |
205 | struct enic *enic = netdev_priv(netdev); | |
206 | ||
207 | if (data && !ENIC_SETTING(enic, RXCSUM)) | |
208 | return -EINVAL; | |
209 | ||
210 | enic->csum_rx_enabled = !!data; | |
211 | ||
212 | return 0; | |
213 | } | |
214 | ||
215 | static int enic_set_tx_csum(struct net_device *netdev, u32 data) | |
216 | { | |
217 | struct enic *enic = netdev_priv(netdev); | |
218 | ||
219 | if (data && !ENIC_SETTING(enic, TXCSUM)) | |
220 | return -EINVAL; | |
221 | ||
222 | if (data) | |
223 | netdev->features |= NETIF_F_HW_CSUM; | |
224 | else | |
225 | netdev->features &= ~NETIF_F_HW_CSUM; | |
226 | ||
227 | return 0; | |
228 | } | |
229 | ||
230 | static int enic_set_tso(struct net_device *netdev, u32 data) | |
231 | { | |
232 | struct enic *enic = netdev_priv(netdev); | |
233 | ||
234 | if (data && !ENIC_SETTING(enic, TSO)) | |
235 | return -EINVAL; | |
236 | ||
237 | if (data) | |
238 | netdev->features |= | |
239 | NETIF_F_TSO | NETIF_F_TSO6 | NETIF_F_TSO_ECN; | |
240 | else | |
241 | netdev->features &= | |
242 | ~(NETIF_F_TSO | NETIF_F_TSO6 | NETIF_F_TSO_ECN); | |
243 | ||
244 | return 0; | |
245 | } | |
246 | ||
247 | static u32 enic_get_msglevel(struct net_device *netdev) | |
248 | { | |
249 | struct enic *enic = netdev_priv(netdev); | |
250 | return enic->msg_enable; | |
251 | } | |
252 | ||
253 | static void enic_set_msglevel(struct net_device *netdev, u32 value) | |
254 | { | |
255 | struct enic *enic = netdev_priv(netdev); | |
256 | enic->msg_enable = value; | |
257 | } | |
258 | ||
259 | static struct ethtool_ops enic_ethtool_ops = { | |
260 | .get_settings = enic_get_settings, | |
261 | .get_drvinfo = enic_get_drvinfo, | |
262 | .get_msglevel = enic_get_msglevel, | |
263 | .set_msglevel = enic_set_msglevel, | |
264 | .get_link = ethtool_op_get_link, | |
265 | .get_strings = enic_get_strings, | |
266 | .get_sset_count = enic_get_sset_count, | |
267 | .get_ethtool_stats = enic_get_ethtool_stats, | |
268 | .get_rx_csum = enic_get_rx_csum, | |
269 | .set_rx_csum = enic_set_rx_csum, | |
270 | .get_tx_csum = ethtool_op_get_tx_csum, | |
271 | .set_tx_csum = enic_set_tx_csum, | |
272 | .get_sg = ethtool_op_get_sg, | |
273 | .set_sg = ethtool_op_set_sg, | |
274 | .get_tso = ethtool_op_get_tso, | |
275 | .set_tso = enic_set_tso, | |
276 | }; | |
277 | ||
278 | static void enic_free_wq_buf(struct vnic_wq *wq, struct vnic_wq_buf *buf) | |
279 | { | |
280 | struct enic *enic = vnic_dev_priv(wq->vdev); | |
281 | ||
282 | if (buf->sop) | |
283 | pci_unmap_single(enic->pdev, buf->dma_addr, | |
284 | buf->len, PCI_DMA_TODEVICE); | |
285 | else | |
286 | pci_unmap_page(enic->pdev, buf->dma_addr, | |
287 | buf->len, PCI_DMA_TODEVICE); | |
288 | ||
289 | if (buf->os_buf) | |
290 | dev_kfree_skb_any(buf->os_buf); | |
291 | } | |
292 | ||
293 | static void enic_wq_free_buf(struct vnic_wq *wq, | |
294 | struct cq_desc *cq_desc, struct vnic_wq_buf *buf, void *opaque) | |
295 | { | |
296 | enic_free_wq_buf(wq, buf); | |
297 | } | |
298 | ||
299 | static int enic_wq_service(struct vnic_dev *vdev, struct cq_desc *cq_desc, | |
300 | u8 type, u16 q_number, u16 completed_index, void *opaque) | |
301 | { | |
302 | struct enic *enic = vnic_dev_priv(vdev); | |
303 | ||
304 | spin_lock(&enic->wq_lock[q_number]); | |
305 | ||
306 | vnic_wq_service(&enic->wq[q_number], cq_desc, | |
307 | completed_index, enic_wq_free_buf, | |
308 | opaque); | |
309 | ||
310 | if (netif_queue_stopped(enic->netdev) && | |
311 | vnic_wq_desc_avail(&enic->wq[q_number]) >= MAX_SKB_FRAGS + 1) | |
312 | netif_wake_queue(enic->netdev); | |
313 | ||
314 | spin_unlock(&enic->wq_lock[q_number]); | |
315 | ||
316 | return 0; | |
317 | } | |
318 | ||
319 | static void enic_log_q_error(struct enic *enic) | |
320 | { | |
321 | unsigned int i; | |
322 | u32 error_status; | |
323 | ||
324 | for (i = 0; i < enic->wq_count; i++) { | |
325 | error_status = vnic_wq_error_status(&enic->wq[i]); | |
326 | if (error_status) | |
327 | printk(KERN_ERR PFX "%s: WQ[%d] error_status %d\n", | |
328 | enic->netdev->name, i, error_status); | |
329 | } | |
330 | ||
331 | for (i = 0; i < enic->rq_count; i++) { | |
332 | error_status = vnic_rq_error_status(&enic->rq[i]); | |
333 | if (error_status) | |
334 | printk(KERN_ERR PFX "%s: RQ[%d] error_status %d\n", | |
335 | enic->netdev->name, i, error_status); | |
336 | } | |
337 | } | |
338 | ||
339 | static void enic_link_check(struct enic *enic) | |
340 | { | |
341 | int link_status = vnic_dev_link_status(enic->vdev); | |
342 | int carrier_ok = netif_carrier_ok(enic->netdev); | |
343 | ||
344 | if (link_status && !carrier_ok) { | |
345 | printk(KERN_INFO PFX "%s: Link UP\n", enic->netdev->name); | |
346 | netif_carrier_on(enic->netdev); | |
347 | } else if (!link_status && carrier_ok) { | |
348 | printk(KERN_INFO PFX "%s: Link DOWN\n", enic->netdev->name); | |
349 | netif_carrier_off(enic->netdev); | |
350 | } | |
351 | } | |
352 | ||
353 | static void enic_mtu_check(struct enic *enic) | |
354 | { | |
355 | u32 mtu = vnic_dev_mtu(enic->vdev); | |
356 | ||
357 | if (mtu != enic->port_mtu) { | |
358 | if (mtu < enic->netdev->mtu) | |
359 | printk(KERN_WARNING PFX | |
360 | "%s: interface MTU (%d) set higher " | |
361 | "than switch port MTU (%d)\n", | |
362 | enic->netdev->name, enic->netdev->mtu, mtu); | |
363 | enic->port_mtu = mtu; | |
364 | } | |
365 | } | |
366 | ||
367 | static void enic_msglvl_check(struct enic *enic) | |
368 | { | |
369 | u32 msg_enable = vnic_dev_msg_lvl(enic->vdev); | |
370 | ||
371 | if (msg_enable != enic->msg_enable) { | |
372 | printk(KERN_INFO PFX "%s: msg lvl changed from 0x%x to 0x%x\n", | |
373 | enic->netdev->name, enic->msg_enable, msg_enable); | |
374 | enic->msg_enable = msg_enable; | |
375 | } | |
376 | } | |
377 | ||
378 | static void enic_notify_check(struct enic *enic) | |
379 | { | |
380 | enic_msglvl_check(enic); | |
381 | enic_mtu_check(enic); | |
382 | enic_link_check(enic); | |
383 | } | |
384 | ||
385 | #define ENIC_TEST_INTR(pba, i) (pba & (1 << i)) | |
386 | ||
387 | static irqreturn_t enic_isr_legacy(int irq, void *data) | |
388 | { | |
389 | struct net_device *netdev = data; | |
390 | struct enic *enic = netdev_priv(netdev); | |
391 | u32 pba; | |
392 | ||
393 | vnic_intr_mask(&enic->intr[ENIC_INTX_WQ_RQ]); | |
394 | ||
395 | pba = vnic_intr_legacy_pba(enic->legacy_pba); | |
396 | if (!pba) { | |
397 | vnic_intr_unmask(&enic->intr[ENIC_INTX_WQ_RQ]); | |
398 | return IRQ_NONE; /* not our interrupt */ | |
399 | } | |
400 | ||
401 | if (ENIC_TEST_INTR(pba, ENIC_INTX_NOTIFY)) | |
402 | enic_notify_check(enic); | |
403 | ||
404 | if (ENIC_TEST_INTR(pba, ENIC_INTX_ERR)) { | |
405 | enic_log_q_error(enic); | |
406 | /* schedule recovery from WQ/RQ error */ | |
407 | schedule_work(&enic->reset); | |
408 | return IRQ_HANDLED; | |
409 | } | |
410 | ||
411 | if (ENIC_TEST_INTR(pba, ENIC_INTX_WQ_RQ)) { | |
412 | if (netif_rx_schedule_prep(netdev, &enic->napi)) | |
413 | __netif_rx_schedule(netdev, &enic->napi); | |
414 | } else { | |
415 | vnic_intr_unmask(&enic->intr[ENIC_INTX_WQ_RQ]); | |
416 | } | |
417 | ||
418 | return IRQ_HANDLED; | |
419 | } | |
420 | ||
421 | static irqreturn_t enic_isr_msi(int irq, void *data) | |
422 | { | |
423 | struct enic *enic = data; | |
424 | ||
425 | /* With MSI, there is no sharing of interrupts, so this is | |
426 | * our interrupt and there is no need to ack it. The device | |
427 | * is not providing per-vector masking, so the OS will not | |
428 | * write to PCI config space to mask/unmask the interrupt. | |
429 | * We're using mask_on_assertion for MSI, so the device | |
430 | * automatically masks the interrupt when the interrupt is | |
431 | * generated. Later, when exiting polling, the interrupt | |
432 | * will be unmasked (see enic_poll). | |
433 | * | |
434 | * Also, the device uses the same PCIe Traffic Class (TC) | |
435 | * for Memory Write data and MSI, so there are no ordering | |
436 | * issues; the MSI will always arrive at the Root Complex | |
437 | * _after_ corresponding Memory Writes (i.e. descriptor | |
438 | * writes). | |
439 | */ | |
440 | ||
441 | netif_rx_schedule(enic->netdev, &enic->napi); | |
442 | ||
443 | return IRQ_HANDLED; | |
444 | } | |
445 | ||
446 | static irqreturn_t enic_isr_msix_rq(int irq, void *data) | |
447 | { | |
448 | struct enic *enic = data; | |
449 | ||
450 | /* schedule NAPI polling for RQ cleanup */ | |
451 | netif_rx_schedule(enic->netdev, &enic->napi); | |
452 | ||
453 | return IRQ_HANDLED; | |
454 | } | |
455 | ||
456 | static irqreturn_t enic_isr_msix_wq(int irq, void *data) | |
457 | { | |
458 | struct enic *enic = data; | |
459 | unsigned int wq_work_to_do = -1; /* no limit */ | |
460 | unsigned int wq_work_done; | |
461 | ||
462 | wq_work_done = vnic_cq_service(&enic->cq[ENIC_CQ_WQ], | |
463 | wq_work_to_do, enic_wq_service, NULL); | |
464 | ||
465 | vnic_intr_return_credits(&enic->intr[ENIC_MSIX_WQ], | |
466 | wq_work_done, | |
467 | 1 /* unmask intr */, | |
468 | 1 /* reset intr timer */); | |
469 | ||
470 | return IRQ_HANDLED; | |
471 | } | |
472 | ||
473 | static irqreturn_t enic_isr_msix_err(int irq, void *data) | |
474 | { | |
475 | struct enic *enic = data; | |
476 | ||
477 | enic_log_q_error(enic); | |
478 | ||
479 | /* schedule recovery from WQ/RQ error */ | |
480 | schedule_work(&enic->reset); | |
481 | ||
482 | return IRQ_HANDLED; | |
483 | } | |
484 | ||
485 | static irqreturn_t enic_isr_msix_notify(int irq, void *data) | |
486 | { | |
487 | struct enic *enic = data; | |
488 | ||
489 | enic_notify_check(enic); | |
490 | vnic_intr_unmask(&enic->intr[ENIC_MSIX_NOTIFY]); | |
491 | ||
492 | return IRQ_HANDLED; | |
493 | } | |
494 | ||
495 | static inline void enic_queue_wq_skb_cont(struct enic *enic, | |
496 | struct vnic_wq *wq, struct sk_buff *skb, | |
497 | unsigned int len_left) | |
498 | { | |
499 | skb_frag_t *frag; | |
500 | ||
501 | /* Queue additional data fragments */ | |
502 | for (frag = skb_shinfo(skb)->frags; len_left; frag++) { | |
503 | len_left -= frag->size; | |
504 | enic_queue_wq_desc_cont(wq, skb, | |
505 | pci_map_page(enic->pdev, frag->page, | |
506 | frag->page_offset, frag->size, | |
507 | PCI_DMA_TODEVICE), | |
508 | frag->size, | |
509 | (len_left == 0)); /* EOP? */ | |
510 | } | |
511 | } | |
512 | ||
513 | static inline void enic_queue_wq_skb_vlan(struct enic *enic, | |
514 | struct vnic_wq *wq, struct sk_buff *skb, | |
515 | int vlan_tag_insert, unsigned int vlan_tag) | |
516 | { | |
517 | unsigned int head_len = skb_headlen(skb); | |
518 | unsigned int len_left = skb->len - head_len; | |
519 | int eop = (len_left == 0); | |
520 | ||
521 | /* Queue the main skb fragment */ | |
522 | enic_queue_wq_desc(wq, skb, | |
523 | pci_map_single(enic->pdev, skb->data, | |
524 | head_len, PCI_DMA_TODEVICE), | |
525 | head_len, | |
526 | vlan_tag_insert, vlan_tag, | |
527 | eop); | |
528 | ||
529 | if (!eop) | |
530 | enic_queue_wq_skb_cont(enic, wq, skb, len_left); | |
531 | } | |
532 | ||
533 | static inline void enic_queue_wq_skb_csum_l4(struct enic *enic, | |
534 | struct vnic_wq *wq, struct sk_buff *skb, | |
535 | int vlan_tag_insert, unsigned int vlan_tag) | |
536 | { | |
537 | unsigned int head_len = skb_headlen(skb); | |
538 | unsigned int len_left = skb->len - head_len; | |
539 | unsigned int hdr_len = skb_transport_offset(skb); | |
540 | unsigned int csum_offset = hdr_len + skb->csum_offset; | |
541 | int eop = (len_left == 0); | |
542 | ||
543 | /* Queue the main skb fragment */ | |
544 | enic_queue_wq_desc_csum_l4(wq, skb, | |
545 | pci_map_single(enic->pdev, skb->data, | |
546 | head_len, PCI_DMA_TODEVICE), | |
547 | head_len, | |
548 | csum_offset, | |
549 | hdr_len, | |
550 | vlan_tag_insert, vlan_tag, | |
551 | eop); | |
552 | ||
553 | if (!eop) | |
554 | enic_queue_wq_skb_cont(enic, wq, skb, len_left); | |
555 | } | |
556 | ||
557 | static inline void enic_queue_wq_skb_tso(struct enic *enic, | |
558 | struct vnic_wq *wq, struct sk_buff *skb, unsigned int mss, | |
559 | int vlan_tag_insert, unsigned int vlan_tag) | |
560 | { | |
561 | unsigned int head_len = skb_headlen(skb); | |
562 | unsigned int len_left = skb->len - head_len; | |
563 | unsigned int hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb); | |
564 | int eop = (len_left == 0); | |
565 | ||
566 | /* Preload TCP csum field with IP pseudo hdr calculated | |
567 | * with IP length set to zero. HW will later add in length | |
568 | * to each TCP segment resulting from the TSO. | |
569 | */ | |
570 | ||
571 | if (skb->protocol == __constant_htons(ETH_P_IP)) { | |
572 | ip_hdr(skb)->check = 0; | |
573 | tcp_hdr(skb)->check = ~csum_tcpudp_magic(ip_hdr(skb)->saddr, | |
574 | ip_hdr(skb)->daddr, 0, IPPROTO_TCP, 0); | |
575 | } else if (skb->protocol == __constant_htons(ETH_P_IPV6)) { | |
576 | tcp_hdr(skb)->check = ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr, | |
577 | &ipv6_hdr(skb)->daddr, 0, IPPROTO_TCP, 0); | |
578 | } | |
579 | ||
580 | /* Queue the main skb fragment */ | |
581 | enic_queue_wq_desc_tso(wq, skb, | |
582 | pci_map_single(enic->pdev, skb->data, | |
583 | head_len, PCI_DMA_TODEVICE), | |
584 | head_len, | |
585 | mss, hdr_len, | |
586 | vlan_tag_insert, vlan_tag, | |
587 | eop); | |
588 | ||
589 | if (!eop) | |
590 | enic_queue_wq_skb_cont(enic, wq, skb, len_left); | |
591 | } | |
592 | ||
593 | static inline void enic_queue_wq_skb(struct enic *enic, | |
594 | struct vnic_wq *wq, struct sk_buff *skb) | |
595 | { | |
596 | unsigned int mss = skb_shinfo(skb)->gso_size; | |
597 | unsigned int vlan_tag = 0; | |
598 | int vlan_tag_insert = 0; | |
599 | ||
600 | if (enic->vlan_group && vlan_tx_tag_present(skb)) { | |
601 | /* VLAN tag from trunking driver */ | |
602 | vlan_tag_insert = 1; | |
603 | vlan_tag = vlan_tx_tag_get(skb); | |
604 | } | |
605 | ||
606 | if (mss) | |
607 | enic_queue_wq_skb_tso(enic, wq, skb, mss, | |
608 | vlan_tag_insert, vlan_tag); | |
609 | else if (skb->ip_summed == CHECKSUM_PARTIAL) | |
610 | enic_queue_wq_skb_csum_l4(enic, wq, skb, | |
611 | vlan_tag_insert, vlan_tag); | |
612 | else | |
613 | enic_queue_wq_skb_vlan(enic, wq, skb, | |
614 | vlan_tag_insert, vlan_tag); | |
615 | } | |
616 | ||
617 | /* netif_tx_lock held, process context with BHs disabled */ | |
618 | static int enic_hard_start_xmit(struct sk_buff *skb, struct net_device *netdev) | |
619 | { | |
620 | struct enic *enic = netdev_priv(netdev); | |
621 | struct vnic_wq *wq = &enic->wq[0]; | |
622 | unsigned long flags; | |
623 | ||
624 | if (skb->len <= 0) { | |
625 | dev_kfree_skb(skb); | |
626 | return NETDEV_TX_OK; | |
627 | } | |
628 | ||
629 | /* Non-TSO sends must fit within ENIC_NON_TSO_MAX_DESC descs, | |
630 | * which is very likely. In the off chance it's going to take | |
631 | * more than * ENIC_NON_TSO_MAX_DESC, linearize the skb. | |
632 | */ | |
633 | ||
634 | if (skb_shinfo(skb)->gso_size == 0 && | |
635 | skb_shinfo(skb)->nr_frags + 1 > ENIC_NON_TSO_MAX_DESC && | |
636 | skb_linearize(skb)) { | |
637 | dev_kfree_skb(skb); | |
638 | return NETDEV_TX_OK; | |
639 | } | |
640 | ||
641 | spin_lock_irqsave(&enic->wq_lock[0], flags); | |
642 | ||
643 | if (vnic_wq_desc_avail(wq) < skb_shinfo(skb)->nr_frags + 1) { | |
644 | netif_stop_queue(netdev); | |
645 | /* This is a hard error, log it */ | |
646 | printk(KERN_ERR PFX "%s: BUG! Tx ring full when " | |
647 | "queue awake!\n", netdev->name); | |
648 | spin_unlock_irqrestore(&enic->wq_lock[0], flags); | |
649 | return NETDEV_TX_BUSY; | |
650 | } | |
651 | ||
652 | enic_queue_wq_skb(enic, wq, skb); | |
653 | ||
654 | if (vnic_wq_desc_avail(wq) < MAX_SKB_FRAGS + 1) | |
655 | netif_stop_queue(netdev); | |
656 | ||
657 | netdev->trans_start = jiffies; | |
658 | ||
659 | spin_unlock_irqrestore(&enic->wq_lock[0], flags); | |
660 | ||
661 | return NETDEV_TX_OK; | |
662 | } | |
663 | ||
664 | /* dev_base_lock rwlock held, nominally process context */ | |
665 | static struct net_device_stats *enic_get_stats(struct net_device *netdev) | |
666 | { | |
667 | struct enic *enic = netdev_priv(netdev); | |
668 | struct net_device_stats *net_stats = &netdev->stats; | |
669 | struct vnic_stats *stats; | |
670 | ||
671 | spin_lock(&enic->devcmd_lock); | |
672 | vnic_dev_stats_dump(enic->vdev, &stats); | |
673 | spin_unlock(&enic->devcmd_lock); | |
674 | ||
675 | net_stats->tx_packets = stats->tx.tx_frames_ok; | |
676 | net_stats->tx_bytes = stats->tx.tx_bytes_ok; | |
677 | net_stats->tx_errors = stats->tx.tx_errors; | |
678 | net_stats->tx_dropped = stats->tx.tx_drops; | |
679 | ||
680 | net_stats->rx_packets = stats->rx.rx_frames_ok; | |
681 | net_stats->rx_bytes = stats->rx.rx_bytes_ok; | |
682 | net_stats->rx_errors = stats->rx.rx_errors; | |
683 | net_stats->multicast = stats->rx.rx_multicast_frames_ok; | |
684 | net_stats->rx_crc_errors = stats->rx.rx_crc_errors; | |
685 | net_stats->rx_dropped = stats->rx.rx_no_bufs; | |
686 | ||
687 | return net_stats; | |
688 | } | |
689 | ||
690 | static void enic_reset_mcaddrs(struct enic *enic) | |
691 | { | |
692 | enic->mc_count = 0; | |
693 | } | |
694 | ||
695 | static int enic_set_mac_addr(struct net_device *netdev, char *addr) | |
696 | { | |
697 | if (!is_valid_ether_addr(addr)) | |
698 | return -EADDRNOTAVAIL; | |
699 | ||
700 | memcpy(netdev->dev_addr, addr, netdev->addr_len); | |
701 | ||
702 | return 0; | |
703 | } | |
704 | ||
705 | /* netif_tx_lock held, BHs disabled */ | |
706 | static void enic_set_multicast_list(struct net_device *netdev) | |
707 | { | |
708 | struct enic *enic = netdev_priv(netdev); | |
709 | struct dev_mc_list *list = netdev->mc_list; | |
710 | int directed = 1; | |
711 | int multicast = (netdev->flags & IFF_MULTICAST) ? 1 : 0; | |
712 | int broadcast = (netdev->flags & IFF_BROADCAST) ? 1 : 0; | |
713 | int promisc = (netdev->flags & IFF_PROMISC) ? 1 : 0; | |
714 | int allmulti = (netdev->flags & IFF_ALLMULTI) || | |
715 | (netdev->mc_count > ENIC_MULTICAST_PERFECT_FILTERS); | |
716 | u8 mc_addr[ENIC_MULTICAST_PERFECT_FILTERS][ETH_ALEN]; | |
717 | unsigned int mc_count = netdev->mc_count; | |
718 | unsigned int i, j; | |
719 | ||
720 | if (mc_count > ENIC_MULTICAST_PERFECT_FILTERS) | |
721 | mc_count = ENIC_MULTICAST_PERFECT_FILTERS; | |
722 | ||
723 | spin_lock(&enic->devcmd_lock); | |
724 | ||
725 | vnic_dev_packet_filter(enic->vdev, directed, | |
726 | multicast, broadcast, promisc, allmulti); | |
727 | ||
728 | /* Is there an easier way? Trying to minimize to | |
729 | * calls to add/del multicast addrs. We keep the | |
730 | * addrs from the last call in enic->mc_addr and | |
731 | * look for changes to add/del. | |
732 | */ | |
733 | ||
734 | for (i = 0; list && i < mc_count; i++) { | |
735 | memcpy(mc_addr[i], list->dmi_addr, ETH_ALEN); | |
736 | list = list->next; | |
737 | } | |
738 | ||
739 | for (i = 0; i < enic->mc_count; i++) { | |
740 | for (j = 0; j < mc_count; j++) | |
741 | if (compare_ether_addr(enic->mc_addr[i], | |
742 | mc_addr[j]) == 0) | |
743 | break; | |
744 | if (j == mc_count) | |
745 | enic_del_multicast_addr(enic, enic->mc_addr[i]); | |
746 | } | |
747 | ||
748 | for (i = 0; i < mc_count; i++) { | |
749 | for (j = 0; j < enic->mc_count; j++) | |
750 | if (compare_ether_addr(mc_addr[i], | |
751 | enic->mc_addr[j]) == 0) | |
752 | break; | |
753 | if (j == enic->mc_count) | |
754 | enic_add_multicast_addr(enic, mc_addr[i]); | |
755 | } | |
756 | ||
757 | /* Save the list to compare against next time | |
758 | */ | |
759 | ||
760 | for (i = 0; i < mc_count; i++) | |
761 | memcpy(enic->mc_addr[i], mc_addr[i], ETH_ALEN); | |
762 | ||
763 | enic->mc_count = mc_count; | |
764 | ||
765 | spin_unlock(&enic->devcmd_lock); | |
766 | } | |
767 | ||
768 | /* rtnl lock is held */ | |
769 | static void enic_vlan_rx_register(struct net_device *netdev, | |
770 | struct vlan_group *vlan_group) | |
771 | { | |
772 | struct enic *enic = netdev_priv(netdev); | |
773 | enic->vlan_group = vlan_group; | |
774 | } | |
775 | ||
776 | /* rtnl lock is held */ | |
777 | static void enic_vlan_rx_add_vid(struct net_device *netdev, u16 vid) | |
778 | { | |
779 | struct enic *enic = netdev_priv(netdev); | |
780 | ||
781 | spin_lock(&enic->devcmd_lock); | |
782 | enic_add_vlan(enic, vid); | |
783 | spin_unlock(&enic->devcmd_lock); | |
784 | } | |
785 | ||
786 | /* rtnl lock is held */ | |
787 | static void enic_vlan_rx_kill_vid(struct net_device *netdev, u16 vid) | |
788 | { | |
789 | struct enic *enic = netdev_priv(netdev); | |
790 | ||
791 | spin_lock(&enic->devcmd_lock); | |
792 | enic_del_vlan(enic, vid); | |
793 | spin_unlock(&enic->devcmd_lock); | |
794 | } | |
795 | ||
796 | /* netif_tx_lock held, BHs disabled */ | |
797 | static void enic_tx_timeout(struct net_device *netdev) | |
798 | { | |
799 | struct enic *enic = netdev_priv(netdev); | |
800 | schedule_work(&enic->reset); | |
801 | } | |
802 | ||
803 | static void enic_free_rq_buf(struct vnic_rq *rq, struct vnic_rq_buf *buf) | |
804 | { | |
805 | struct enic *enic = vnic_dev_priv(rq->vdev); | |
806 | ||
807 | if (!buf->os_buf) | |
808 | return; | |
809 | ||
810 | pci_unmap_single(enic->pdev, buf->dma_addr, | |
811 | buf->len, PCI_DMA_FROMDEVICE); | |
812 | dev_kfree_skb_any(buf->os_buf); | |
813 | } | |
814 | ||
815 | static inline struct sk_buff *enic_rq_alloc_skb(unsigned int size) | |
816 | { | |
817 | struct sk_buff *skb; | |
818 | ||
819 | skb = dev_alloc_skb(size + NET_IP_ALIGN); | |
820 | ||
821 | if (skb) | |
822 | skb_reserve(skb, NET_IP_ALIGN); | |
823 | ||
824 | return skb; | |
825 | } | |
826 | ||
827 | static int enic_rq_alloc_buf(struct vnic_rq *rq) | |
828 | { | |
829 | struct enic *enic = vnic_dev_priv(rq->vdev); | |
830 | struct sk_buff *skb; | |
831 | unsigned int len = enic->netdev->mtu + ETH_HLEN; | |
832 | unsigned int os_buf_index = 0; | |
833 | dma_addr_t dma_addr; | |
834 | ||
835 | skb = enic_rq_alloc_skb(len); | |
836 | if (!skb) | |
837 | return -ENOMEM; | |
838 | ||
839 | dma_addr = pci_map_single(enic->pdev, skb->data, | |
840 | len, PCI_DMA_FROMDEVICE); | |
841 | ||
842 | enic_queue_rq_desc(rq, skb, os_buf_index, | |
843 | dma_addr, len); | |
844 | ||
845 | return 0; | |
846 | } | |
847 | ||
848 | static int enic_get_skb_header(struct sk_buff *skb, void **iphdr, | |
849 | void **tcph, u64 *hdr_flags, void *priv) | |
850 | { | |
851 | struct cq_enet_rq_desc *cq_desc = priv; | |
852 | unsigned int ip_len; | |
853 | struct iphdr *iph; | |
854 | ||
855 | u8 type, color, eop, sop, ingress_port, vlan_stripped; | |
856 | u8 fcoe, fcoe_sof, fcoe_fc_crc_ok, fcoe_enc_error, fcoe_eof; | |
857 | u8 tcp_udp_csum_ok, udp, tcp, ipv4_csum_ok; | |
858 | u8 ipv6, ipv4, ipv4_fragment, fcs_ok, rss_type, csum_not_calc; | |
859 | u8 packet_error; | |
860 | u16 q_number, completed_index, bytes_written, vlan, checksum; | |
861 | u32 rss_hash; | |
862 | ||
863 | cq_enet_rq_desc_dec(cq_desc, | |
864 | &type, &color, &q_number, &completed_index, | |
865 | &ingress_port, &fcoe, &eop, &sop, &rss_type, | |
866 | &csum_not_calc, &rss_hash, &bytes_written, | |
867 | &packet_error, &vlan_stripped, &vlan, &checksum, | |
868 | &fcoe_sof, &fcoe_fc_crc_ok, &fcoe_enc_error, | |
869 | &fcoe_eof, &tcp_udp_csum_ok, &udp, &tcp, | |
870 | &ipv4_csum_ok, &ipv6, &ipv4, &ipv4_fragment, | |
871 | &fcs_ok); | |
872 | ||
873 | if (!(ipv4 && tcp && !ipv4_fragment)) | |
874 | return -1; | |
875 | ||
876 | skb_reset_network_header(skb); | |
877 | iph = ip_hdr(skb); | |
878 | ||
879 | ip_len = ip_hdrlen(skb); | |
880 | skb_set_transport_header(skb, ip_len); | |
881 | ||
882 | /* check if ip header and tcp header are complete */ | |
883 | if (ntohs(iph->tot_len) < ip_len + tcp_hdrlen(skb)) | |
884 | return -1; | |
885 | ||
886 | *hdr_flags = LRO_IPV4 | LRO_TCP; | |
887 | *tcph = tcp_hdr(skb); | |
888 | *iphdr = iph; | |
889 | ||
890 | return 0; | |
891 | } | |
892 | ||
893 | static void enic_rq_indicate_buf(struct vnic_rq *rq, | |
894 | struct cq_desc *cq_desc, struct vnic_rq_buf *buf, | |
895 | int skipped, void *opaque) | |
896 | { | |
897 | struct enic *enic = vnic_dev_priv(rq->vdev); | |
898 | struct sk_buff *skb; | |
899 | ||
900 | u8 type, color, eop, sop, ingress_port, vlan_stripped; | |
901 | u8 fcoe, fcoe_sof, fcoe_fc_crc_ok, fcoe_enc_error, fcoe_eof; | |
902 | u8 tcp_udp_csum_ok, udp, tcp, ipv4_csum_ok; | |
903 | u8 ipv6, ipv4, ipv4_fragment, fcs_ok, rss_type, csum_not_calc; | |
904 | u8 packet_error; | |
905 | u16 q_number, completed_index, bytes_written, vlan, checksum; | |
906 | u32 rss_hash; | |
907 | ||
908 | if (skipped) | |
909 | return; | |
910 | ||
911 | skb = buf->os_buf; | |
912 | prefetch(skb->data - NET_IP_ALIGN); | |
913 | pci_unmap_single(enic->pdev, buf->dma_addr, | |
914 | buf->len, PCI_DMA_FROMDEVICE); | |
915 | ||
916 | cq_enet_rq_desc_dec((struct cq_enet_rq_desc *)cq_desc, | |
917 | &type, &color, &q_number, &completed_index, | |
918 | &ingress_port, &fcoe, &eop, &sop, &rss_type, | |
919 | &csum_not_calc, &rss_hash, &bytes_written, | |
920 | &packet_error, &vlan_stripped, &vlan, &checksum, | |
921 | &fcoe_sof, &fcoe_fc_crc_ok, &fcoe_enc_error, | |
922 | &fcoe_eof, &tcp_udp_csum_ok, &udp, &tcp, | |
923 | &ipv4_csum_ok, &ipv6, &ipv4, &ipv4_fragment, | |
924 | &fcs_ok); | |
925 | ||
926 | if (packet_error) { | |
927 | ||
928 | if (bytes_written > 0 && !fcs_ok) { | |
929 | if (net_ratelimit()) | |
930 | printk(KERN_ERR PFX | |
931 | "%s: packet error: bad FCS\n", | |
932 | enic->netdev->name); | |
933 | } | |
934 | ||
935 | dev_kfree_skb_any(skb); | |
936 | ||
937 | return; | |
938 | } | |
939 | ||
940 | if (eop && bytes_written > 0) { | |
941 | ||
942 | /* Good receive | |
943 | */ | |
944 | ||
945 | skb_put(skb, bytes_written); | |
946 | skb->protocol = eth_type_trans(skb, enic->netdev); | |
947 | ||
948 | if (enic->csum_rx_enabled && !csum_not_calc) { | |
949 | skb->csum = htons(checksum); | |
950 | skb->ip_summed = CHECKSUM_COMPLETE; | |
951 | } | |
952 | ||
953 | skb->dev = enic->netdev; | |
954 | ||
955 | if (enic->vlan_group && vlan_stripped) { | |
956 | ||
957 | if (ENIC_SETTING(enic, LRO) && ipv4) | |
958 | lro_vlan_hwaccel_receive_skb(&enic->lro_mgr, | |
959 | skb, enic->vlan_group, | |
960 | vlan, cq_desc); | |
961 | else | |
962 | vlan_hwaccel_receive_skb(skb, | |
963 | enic->vlan_group, vlan); | |
964 | ||
965 | } else { | |
966 | ||
967 | if (ENIC_SETTING(enic, LRO) && ipv4) | |
968 | lro_receive_skb(&enic->lro_mgr, skb, cq_desc); | |
969 | else | |
970 | netif_receive_skb(skb); | |
971 | ||
972 | } | |
973 | ||
974 | } else { | |
975 | ||
976 | /* Buffer overflow | |
977 | */ | |
978 | ||
979 | dev_kfree_skb_any(skb); | |
980 | } | |
981 | } | |
982 | ||
983 | static int enic_rq_service(struct vnic_dev *vdev, struct cq_desc *cq_desc, | |
984 | u8 type, u16 q_number, u16 completed_index, void *opaque) | |
985 | { | |
986 | struct enic *enic = vnic_dev_priv(vdev); | |
987 | ||
988 | vnic_rq_service(&enic->rq[q_number], cq_desc, | |
989 | completed_index, VNIC_RQ_RETURN_DESC, | |
990 | enic_rq_indicate_buf, opaque); | |
991 | ||
992 | return 0; | |
993 | } | |
994 | ||
995 | static void enic_rq_drop_buf(struct vnic_rq *rq, | |
996 | struct cq_desc *cq_desc, struct vnic_rq_buf *buf, | |
997 | int skipped, void *opaque) | |
998 | { | |
999 | struct enic *enic = vnic_dev_priv(rq->vdev); | |
1000 | struct sk_buff *skb = buf->os_buf; | |
1001 | ||
1002 | if (skipped) | |
1003 | return; | |
1004 | ||
1005 | pci_unmap_single(enic->pdev, buf->dma_addr, | |
1006 | buf->len, PCI_DMA_FROMDEVICE); | |
1007 | ||
1008 | dev_kfree_skb_any(skb); | |
1009 | } | |
1010 | ||
1011 | static int enic_rq_service_drop(struct vnic_dev *vdev, struct cq_desc *cq_desc, | |
1012 | u8 type, u16 q_number, u16 completed_index, void *opaque) | |
1013 | { | |
1014 | struct enic *enic = vnic_dev_priv(vdev); | |
1015 | ||
1016 | vnic_rq_service(&enic->rq[q_number], cq_desc, | |
1017 | completed_index, VNIC_RQ_RETURN_DESC, | |
1018 | enic_rq_drop_buf, opaque); | |
1019 | ||
1020 | return 0; | |
1021 | } | |
1022 | ||
1023 | static int enic_poll(struct napi_struct *napi, int budget) | |
1024 | { | |
1025 | struct enic *enic = container_of(napi, struct enic, napi); | |
1026 | struct net_device *netdev = enic->netdev; | |
1027 | unsigned int rq_work_to_do = budget; | |
1028 | unsigned int wq_work_to_do = -1; /* no limit */ | |
1029 | unsigned int work_done, rq_work_done, wq_work_done; | |
1030 | ||
1031 | /* Service RQ (first) and WQ | |
1032 | */ | |
1033 | ||
1034 | rq_work_done = vnic_cq_service(&enic->cq[ENIC_CQ_RQ], | |
1035 | rq_work_to_do, enic_rq_service, NULL); | |
1036 | ||
1037 | wq_work_done = vnic_cq_service(&enic->cq[ENIC_CQ_WQ], | |
1038 | wq_work_to_do, enic_wq_service, NULL); | |
1039 | ||
1040 | /* Accumulate intr event credits for this polling | |
1041 | * cycle. An intr event is the completion of a | |
1042 | * a WQ or RQ packet. | |
1043 | */ | |
1044 | ||
1045 | work_done = rq_work_done + wq_work_done; | |
1046 | ||
1047 | if (work_done > 0) | |
1048 | vnic_intr_return_credits(&enic->intr[ENIC_INTX_WQ_RQ], | |
1049 | work_done, | |
1050 | 0 /* don't unmask intr */, | |
1051 | 0 /* don't reset intr timer */); | |
1052 | ||
1053 | if (rq_work_done > 0) { | |
1054 | ||
1055 | /* Replenish RQ | |
1056 | */ | |
1057 | ||
1058 | vnic_rq_fill(&enic->rq[0], enic_rq_alloc_buf); | |
1059 | ||
1060 | } else { | |
1061 | ||
1062 | /* If no work done, flush all LROs and exit polling | |
1063 | */ | |
1064 | ||
1065 | if (ENIC_SETTING(enic, LRO)) | |
1066 | lro_flush_all(&enic->lro_mgr); | |
1067 | ||
1068 | netif_rx_complete(netdev, napi); | |
1069 | vnic_intr_unmask(&enic->intr[ENIC_MSIX_RQ]); | |
1070 | } | |
1071 | ||
1072 | return rq_work_done; | |
1073 | } | |
1074 | ||
1075 | static int enic_poll_msix(struct napi_struct *napi, int budget) | |
1076 | { | |
1077 | struct enic *enic = container_of(napi, struct enic, napi); | |
1078 | struct net_device *netdev = enic->netdev; | |
1079 | unsigned int work_to_do = budget; | |
1080 | unsigned int work_done; | |
1081 | ||
1082 | /* Service RQ | |
1083 | */ | |
1084 | ||
1085 | work_done = vnic_cq_service(&enic->cq[ENIC_CQ_RQ], | |
1086 | work_to_do, enic_rq_service, NULL); | |
1087 | ||
1088 | if (work_done > 0) { | |
1089 | ||
1090 | /* Replenish RQ | |
1091 | */ | |
1092 | ||
1093 | vnic_rq_fill(&enic->rq[0], enic_rq_alloc_buf); | |
1094 | ||
1095 | /* Accumulate intr event credits for this polling | |
1096 | * cycle. An intr event is the completion of a | |
1097 | * a WQ or RQ packet. | |
1098 | */ | |
1099 | ||
1100 | vnic_intr_return_credits(&enic->intr[ENIC_MSIX_RQ], | |
1101 | work_done, | |
1102 | 0 /* don't unmask intr */, | |
1103 | 0 /* don't reset intr timer */); | |
1104 | } else { | |
1105 | ||
1106 | /* If no work done, flush all LROs and exit polling | |
1107 | */ | |
1108 | ||
1109 | if (ENIC_SETTING(enic, LRO)) | |
1110 | lro_flush_all(&enic->lro_mgr); | |
1111 | ||
1112 | netif_rx_complete(netdev, napi); | |
1113 | vnic_intr_unmask(&enic->intr[ENIC_MSIX_RQ]); | |
1114 | } | |
1115 | ||
1116 | return work_done; | |
1117 | } | |
1118 | ||
1119 | static void enic_notify_timer(unsigned long data) | |
1120 | { | |
1121 | struct enic *enic = (struct enic *)data; | |
1122 | ||
1123 | enic_notify_check(enic); | |
1124 | ||
1125 | mod_timer(&enic->notify_timer, | |
1126 | round_jiffies(jiffies + ENIC_NOTIFY_TIMER_PERIOD)); | |
1127 | } | |
1128 | ||
1129 | static void enic_free_intr(struct enic *enic) | |
1130 | { | |
1131 | struct net_device *netdev = enic->netdev; | |
1132 | unsigned int i; | |
1133 | ||
1134 | switch (vnic_dev_get_intr_mode(enic->vdev)) { | |
1135 | case VNIC_DEV_INTR_MODE_INTX: | |
1136 | free_irq(enic->pdev->irq, netdev); | |
1137 | break; | |
1138 | case VNIC_DEV_INTR_MODE_MSI: | |
1139 | free_irq(enic->pdev->irq, enic); | |
1140 | break; | |
1141 | case VNIC_DEV_INTR_MODE_MSIX: | |
1142 | for (i = 0; i < ARRAY_SIZE(enic->msix); i++) | |
1143 | if (enic->msix[i].requested) | |
1144 | free_irq(enic->msix_entry[i].vector, | |
1145 | enic->msix[i].devid); | |
1146 | break; | |
1147 | default: | |
1148 | break; | |
1149 | } | |
1150 | } | |
1151 | ||
1152 | static int enic_request_intr(struct enic *enic) | |
1153 | { | |
1154 | struct net_device *netdev = enic->netdev; | |
1155 | unsigned int i; | |
1156 | int err = 0; | |
1157 | ||
1158 | switch (vnic_dev_get_intr_mode(enic->vdev)) { | |
1159 | ||
1160 | case VNIC_DEV_INTR_MODE_INTX: | |
1161 | ||
1162 | err = request_irq(enic->pdev->irq, enic_isr_legacy, | |
1163 | IRQF_SHARED, netdev->name, netdev); | |
1164 | break; | |
1165 | ||
1166 | case VNIC_DEV_INTR_MODE_MSI: | |
1167 | ||
1168 | err = request_irq(enic->pdev->irq, enic_isr_msi, | |
1169 | 0, netdev->name, enic); | |
1170 | break; | |
1171 | ||
1172 | case VNIC_DEV_INTR_MODE_MSIX: | |
1173 | ||
1174 | sprintf(enic->msix[ENIC_MSIX_RQ].devname, | |
1175 | "%.11s-rx-0", netdev->name); | |
1176 | enic->msix[ENIC_MSIX_RQ].isr = enic_isr_msix_rq; | |
1177 | enic->msix[ENIC_MSIX_RQ].devid = enic; | |
1178 | ||
1179 | sprintf(enic->msix[ENIC_MSIX_WQ].devname, | |
1180 | "%.11s-tx-0", netdev->name); | |
1181 | enic->msix[ENIC_MSIX_WQ].isr = enic_isr_msix_wq; | |
1182 | enic->msix[ENIC_MSIX_WQ].devid = enic; | |
1183 | ||
1184 | sprintf(enic->msix[ENIC_MSIX_ERR].devname, | |
1185 | "%.11s-err", netdev->name); | |
1186 | enic->msix[ENIC_MSIX_ERR].isr = enic_isr_msix_err; | |
1187 | enic->msix[ENIC_MSIX_ERR].devid = enic; | |
1188 | ||
1189 | sprintf(enic->msix[ENIC_MSIX_NOTIFY].devname, | |
1190 | "%.11s-notify", netdev->name); | |
1191 | enic->msix[ENIC_MSIX_NOTIFY].isr = enic_isr_msix_notify; | |
1192 | enic->msix[ENIC_MSIX_NOTIFY].devid = enic; | |
1193 | ||
1194 | for (i = 0; i < ARRAY_SIZE(enic->msix); i++) { | |
1195 | err = request_irq(enic->msix_entry[i].vector, | |
1196 | enic->msix[i].isr, 0, | |
1197 | enic->msix[i].devname, | |
1198 | enic->msix[i].devid); | |
1199 | if (err) { | |
1200 | enic_free_intr(enic); | |
1201 | break; | |
1202 | } | |
1203 | enic->msix[i].requested = 1; | |
1204 | } | |
1205 | ||
1206 | break; | |
1207 | ||
1208 | default: | |
1209 | break; | |
1210 | } | |
1211 | ||
1212 | return err; | |
1213 | } | |
1214 | ||
1215 | static int enic_notify_set(struct enic *enic) | |
1216 | { | |
1217 | int err; | |
1218 | ||
1219 | switch (vnic_dev_get_intr_mode(enic->vdev)) { | |
1220 | case VNIC_DEV_INTR_MODE_INTX: | |
1221 | err = vnic_dev_notify_set(enic->vdev, ENIC_INTX_NOTIFY); | |
1222 | break; | |
1223 | case VNIC_DEV_INTR_MODE_MSIX: | |
1224 | err = vnic_dev_notify_set(enic->vdev, ENIC_MSIX_NOTIFY); | |
1225 | break; | |
1226 | default: | |
1227 | err = vnic_dev_notify_set(enic->vdev, -1 /* no intr */); | |
1228 | break; | |
1229 | } | |
1230 | ||
1231 | return err; | |
1232 | } | |
1233 | ||
1234 | static void enic_notify_timer_start(struct enic *enic) | |
1235 | { | |
1236 | switch (vnic_dev_get_intr_mode(enic->vdev)) { | |
1237 | case VNIC_DEV_INTR_MODE_MSI: | |
1238 | mod_timer(&enic->notify_timer, jiffies); | |
1239 | break; | |
1240 | default: | |
1241 | /* Using intr for notification for INTx/MSI-X */ | |
1242 | break; | |
1243 | }; | |
1244 | } | |
1245 | ||
1246 | /* rtnl lock is held, process context */ | |
1247 | static int enic_open(struct net_device *netdev) | |
1248 | { | |
1249 | struct enic *enic = netdev_priv(netdev); | |
1250 | unsigned int i; | |
1251 | int err; | |
1252 | ||
1253 | err = enic_request_intr(enic); | |
1254 | if (err) { | |
1255 | printk(KERN_ERR PFX "%s: Unable to request irq.\n", | |
1256 | netdev->name); | |
1257 | return err; | |
1258 | } | |
1259 | ||
1260 | err = enic_notify_set(enic); | |
1261 | if (err) { | |
1262 | printk(KERN_ERR PFX | |
1263 | "%s: Failed to alloc notify buffer, aborting.\n", | |
1264 | netdev->name); | |
1265 | goto err_out_free_intr; | |
1266 | } | |
1267 | ||
1268 | for (i = 0; i < enic->rq_count; i++) { | |
1269 | err = vnic_rq_fill(&enic->rq[i], enic_rq_alloc_buf); | |
1270 | if (err) { | |
1271 | printk(KERN_ERR PFX | |
1272 | "%s: Unable to alloc receive buffers.\n", | |
1273 | netdev->name); | |
1274 | goto err_out_notify_unset; | |
1275 | } | |
1276 | } | |
1277 | ||
1278 | for (i = 0; i < enic->wq_count; i++) | |
1279 | vnic_wq_enable(&enic->wq[i]); | |
1280 | for (i = 0; i < enic->rq_count; i++) | |
1281 | vnic_rq_enable(&enic->rq[i]); | |
1282 | ||
1283 | enic_add_station_addr(enic); | |
1284 | enic_set_multicast_list(netdev); | |
1285 | ||
1286 | netif_wake_queue(netdev); | |
1287 | napi_enable(&enic->napi); | |
1288 | vnic_dev_enable(enic->vdev); | |
1289 | ||
1290 | for (i = 0; i < enic->intr_count; i++) | |
1291 | vnic_intr_unmask(&enic->intr[i]); | |
1292 | ||
1293 | enic_notify_timer_start(enic); | |
1294 | ||
1295 | return 0; | |
1296 | ||
1297 | err_out_notify_unset: | |
1298 | vnic_dev_notify_unset(enic->vdev); | |
1299 | err_out_free_intr: | |
1300 | enic_free_intr(enic); | |
1301 | ||
1302 | return err; | |
1303 | } | |
1304 | ||
1305 | /* rtnl lock is held, process context */ | |
1306 | static int enic_stop(struct net_device *netdev) | |
1307 | { | |
1308 | struct enic *enic = netdev_priv(netdev); | |
1309 | unsigned int i; | |
1310 | int err; | |
1311 | ||
1312 | del_timer_sync(&enic->notify_timer); | |
1313 | ||
1314 | vnic_dev_disable(enic->vdev); | |
1315 | napi_disable(&enic->napi); | |
1316 | netif_stop_queue(netdev); | |
1317 | ||
1318 | for (i = 0; i < enic->intr_count; i++) | |
1319 | vnic_intr_mask(&enic->intr[i]); | |
1320 | ||
1321 | for (i = 0; i < enic->wq_count; i++) { | |
1322 | err = vnic_wq_disable(&enic->wq[i]); | |
1323 | if (err) | |
1324 | return err; | |
1325 | } | |
1326 | for (i = 0; i < enic->rq_count; i++) { | |
1327 | err = vnic_rq_disable(&enic->rq[i]); | |
1328 | if (err) | |
1329 | return err; | |
1330 | } | |
1331 | ||
1332 | vnic_dev_notify_unset(enic->vdev); | |
1333 | enic_free_intr(enic); | |
1334 | ||
1335 | (void)vnic_cq_service(&enic->cq[ENIC_CQ_RQ], | |
1336 | -1, enic_rq_service_drop, NULL); | |
1337 | (void)vnic_cq_service(&enic->cq[ENIC_CQ_WQ], | |
1338 | -1, enic_wq_service, NULL); | |
1339 | ||
1340 | for (i = 0; i < enic->wq_count; i++) | |
1341 | vnic_wq_clean(&enic->wq[i], enic_free_wq_buf); | |
1342 | for (i = 0; i < enic->rq_count; i++) | |
1343 | vnic_rq_clean(&enic->rq[i], enic_free_rq_buf); | |
1344 | for (i = 0; i < enic->cq_count; i++) | |
1345 | vnic_cq_clean(&enic->cq[i]); | |
1346 | for (i = 0; i < enic->intr_count; i++) | |
1347 | vnic_intr_clean(&enic->intr[i]); | |
1348 | ||
1349 | return 0; | |
1350 | } | |
1351 | ||
1352 | static int enic_change_mtu(struct net_device *netdev, int new_mtu) | |
1353 | { | |
1354 | struct enic *enic = netdev_priv(netdev); | |
1355 | int running = netif_running(netdev); | |
1356 | ||
1357 | if (new_mtu < ENIC_MIN_MTU || new_mtu > ENIC_MAX_MTU) | |
1358 | return -EINVAL; | |
1359 | ||
1360 | if (running) | |
1361 | enic_stop(netdev); | |
1362 | ||
1363 | netdev->mtu = new_mtu; | |
1364 | ||
1365 | if (netdev->mtu > enic->port_mtu) | |
1366 | printk(KERN_WARNING PFX | |
1367 | "%s: interface MTU (%d) set higher " | |
1368 | "than port MTU (%d)\n", | |
1369 | netdev->name, netdev->mtu, enic->port_mtu); | |
1370 | ||
1371 | if (running) | |
1372 | enic_open(netdev); | |
1373 | ||
1374 | return 0; | |
1375 | } | |
1376 | ||
1377 | #ifdef CONFIG_NET_POLL_CONTROLLER | |
1378 | static void enic_poll_controller(struct net_device *netdev) | |
1379 | { | |
1380 | struct enic *enic = netdev_priv(netdev); | |
1381 | struct vnic_dev *vdev = enic->vdev; | |
1382 | ||
1383 | switch (vnic_dev_get_intr_mode(vdev)) { | |
1384 | case VNIC_DEV_INTR_MODE_MSIX: | |
1385 | enic_isr_msix_rq(enic->pdev->irq, enic); | |
1386 | enic_isr_msix_wq(enic->pdev->irq, enic); | |
1387 | break; | |
1388 | case VNIC_DEV_INTR_MODE_MSI: | |
1389 | enic_isr_msi(enic->pdev->irq, enic); | |
1390 | break; | |
1391 | case VNIC_DEV_INTR_MODE_INTX: | |
1392 | enic_isr_legacy(enic->pdev->irq, netdev); | |
1393 | break; | |
1394 | default: | |
1395 | break; | |
1396 | } | |
1397 | } | |
1398 | #endif | |
1399 | ||
1400 | static int enic_dev_wait(struct vnic_dev *vdev, | |
1401 | int (*start)(struct vnic_dev *, int), | |
1402 | int (*finished)(struct vnic_dev *, int *), | |
1403 | int arg) | |
1404 | { | |
1405 | unsigned long time; | |
1406 | int done; | |
1407 | int err; | |
1408 | ||
1409 | BUG_ON(in_interrupt()); | |
1410 | ||
1411 | err = start(vdev, arg); | |
1412 | if (err) | |
1413 | return err; | |
1414 | ||
1415 | /* Wait for func to complete...2 seconds max | |
1416 | */ | |
1417 | ||
1418 | time = jiffies + (HZ * 2); | |
1419 | do { | |
1420 | ||
1421 | err = finished(vdev, &done); | |
1422 | if (err) | |
1423 | return err; | |
1424 | ||
1425 | if (done) | |
1426 | return 0; | |
1427 | ||
1428 | schedule_timeout_uninterruptible(HZ / 10); | |
1429 | ||
1430 | } while (time_after(time, jiffies)); | |
1431 | ||
1432 | return -ETIMEDOUT; | |
1433 | } | |
1434 | ||
1435 | static int enic_dev_open(struct enic *enic) | |
1436 | { | |
1437 | int err; | |
1438 | ||
1439 | err = enic_dev_wait(enic->vdev, vnic_dev_open, | |
1440 | vnic_dev_open_done, 0); | |
1441 | if (err) | |
1442 | printk(KERN_ERR PFX | |
1443 | "vNIC device open failed, err %d.\n", err); | |
1444 | ||
1445 | return err; | |
1446 | } | |
1447 | ||
1448 | static int enic_dev_soft_reset(struct enic *enic) | |
1449 | { | |
1450 | int err; | |
1451 | ||
1452 | err = enic_dev_wait(enic->vdev, vnic_dev_soft_reset, | |
1453 | vnic_dev_soft_reset_done, 0); | |
1454 | if (err) | |
1455 | printk(KERN_ERR PFX | |
1456 | "vNIC soft reset failed, err %d.\n", err); | |
1457 | ||
1458 | return err; | |
1459 | } | |
1460 | ||
1461 | static void enic_reset(struct work_struct *work) | |
1462 | { | |
1463 | struct enic *enic = container_of(work, struct enic, reset); | |
1464 | ||
1465 | if (!netif_running(enic->netdev)) | |
1466 | return; | |
1467 | ||
1468 | rtnl_lock(); | |
1469 | ||
1470 | spin_lock(&enic->devcmd_lock); | |
1471 | vnic_dev_hang_notify(enic->vdev); | |
1472 | spin_unlock(&enic->devcmd_lock); | |
1473 | ||
1474 | enic_stop(enic->netdev); | |
1475 | enic_dev_soft_reset(enic); | |
1476 | enic_reset_mcaddrs(enic); | |
1477 | enic_init_vnic_resources(enic); | |
1478 | enic_open(enic->netdev); | |
1479 | ||
1480 | rtnl_unlock(); | |
1481 | } | |
1482 | ||
1483 | static int enic_set_intr_mode(struct enic *enic) | |
1484 | { | |
1485 | unsigned int n = ARRAY_SIZE(enic->rq); | |
1486 | unsigned int m = ARRAY_SIZE(enic->wq); | |
1487 | unsigned int i; | |
1488 | ||
1489 | /* Set interrupt mode (INTx, MSI, MSI-X) depending | |
1490 | * system capabilities. | |
1491 | * | |
1492 | * Try MSI-X first | |
1493 | * | |
1494 | * We need n RQs, m WQs, n+m CQs, and n+m+2 INTRs | |
1495 | * (the second to last INTR is used for WQ/RQ errors) | |
1496 | * (the last INTR is used for notifications) | |
1497 | */ | |
1498 | ||
1499 | BUG_ON(ARRAY_SIZE(enic->msix_entry) < n + m + 2); | |
1500 | for (i = 0; i < n + m + 2; i++) | |
1501 | enic->msix_entry[i].entry = i; | |
1502 | ||
1503 | if (enic->config.intr_mode < 1 && | |
1504 | enic->rq_count >= n && | |
1505 | enic->wq_count >= m && | |
1506 | enic->cq_count >= n + m && | |
1507 | enic->intr_count >= n + m + 2 && | |
1508 | !pci_enable_msix(enic->pdev, enic->msix_entry, n + m + 2)) { | |
1509 | ||
1510 | enic->rq_count = n; | |
1511 | enic->wq_count = m; | |
1512 | enic->cq_count = n + m; | |
1513 | enic->intr_count = n + m + 2; | |
1514 | ||
1515 | vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_MSIX); | |
1516 | ||
1517 | return 0; | |
1518 | } | |
1519 | ||
1520 | /* Next try MSI | |
1521 | * | |
1522 | * We need 1 RQ, 1 WQ, 2 CQs, and 1 INTR | |
1523 | */ | |
1524 | ||
1525 | if (enic->config.intr_mode < 2 && | |
1526 | enic->rq_count >= 1 && | |
1527 | enic->wq_count >= 1 && | |
1528 | enic->cq_count >= 2 && | |
1529 | enic->intr_count >= 1 && | |
1530 | !pci_enable_msi(enic->pdev)) { | |
1531 | ||
1532 | enic->rq_count = 1; | |
1533 | enic->wq_count = 1; | |
1534 | enic->cq_count = 2; | |
1535 | enic->intr_count = 1; | |
1536 | ||
1537 | vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_MSI); | |
1538 | ||
1539 | return 0; | |
1540 | } | |
1541 | ||
1542 | /* Next try INTx | |
1543 | * | |
1544 | * We need 1 RQ, 1 WQ, 2 CQs, and 3 INTRs | |
1545 | * (the first INTR is used for WQ/RQ) | |
1546 | * (the second INTR is used for WQ/RQ errors) | |
1547 | * (the last INTR is used for notifications) | |
1548 | */ | |
1549 | ||
1550 | if (enic->config.intr_mode < 3 && | |
1551 | enic->rq_count >= 1 && | |
1552 | enic->wq_count >= 1 && | |
1553 | enic->cq_count >= 2 && | |
1554 | enic->intr_count >= 3) { | |
1555 | ||
1556 | enic->rq_count = 1; | |
1557 | enic->wq_count = 1; | |
1558 | enic->cq_count = 2; | |
1559 | enic->intr_count = 3; | |
1560 | ||
1561 | vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_INTX); | |
1562 | ||
1563 | return 0; | |
1564 | } | |
1565 | ||
1566 | vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_UNKNOWN); | |
1567 | ||
1568 | return -EINVAL; | |
1569 | } | |
1570 | ||
1571 | static void enic_clear_intr_mode(struct enic *enic) | |
1572 | { | |
1573 | switch (vnic_dev_get_intr_mode(enic->vdev)) { | |
1574 | case VNIC_DEV_INTR_MODE_MSIX: | |
1575 | pci_disable_msix(enic->pdev); | |
1576 | break; | |
1577 | case VNIC_DEV_INTR_MODE_MSI: | |
1578 | pci_disable_msi(enic->pdev); | |
1579 | break; | |
1580 | default: | |
1581 | break; | |
1582 | } | |
1583 | ||
1584 | vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_UNKNOWN); | |
1585 | } | |
1586 | ||
1587 | static void enic_iounmap(struct enic *enic) | |
1588 | { | |
1589 | if (enic->bar0.vaddr) | |
1590 | iounmap(enic->bar0.vaddr); | |
1591 | } | |
1592 | ||
1593 | static int __devinit enic_probe(struct pci_dev *pdev, | |
1594 | const struct pci_device_id *ent) | |
1595 | { | |
1596 | struct net_device *netdev; | |
1597 | struct enic *enic; | |
1598 | int using_dac = 0; | |
1599 | unsigned int i; | |
1600 | int err; | |
1601 | ||
1602 | const u8 rss_default_cpu = 0; | |
1603 | const u8 rss_hash_type = 0; | |
1604 | const u8 rss_hash_bits = 0; | |
1605 | const u8 rss_base_cpu = 0; | |
1606 | const u8 rss_enable = 0; | |
1607 | const u8 tso_ipid_split_en = 0; | |
1608 | const u8 ig_vlan_strip_en = 1; | |
1609 | ||
1610 | /* Allocate net device structure and initialize. Private | |
1611 | * instance data is initialized to zero. | |
1612 | */ | |
1613 | ||
1614 | netdev = alloc_etherdev(sizeof(struct enic)); | |
1615 | if (!netdev) { | |
1616 | printk(KERN_ERR PFX "Etherdev alloc failed, aborting.\n"); | |
1617 | return -ENOMEM; | |
1618 | } | |
1619 | ||
1620 | pci_set_drvdata(pdev, netdev); | |
1621 | ||
1622 | SET_NETDEV_DEV(netdev, &pdev->dev); | |
1623 | ||
1624 | enic = netdev_priv(netdev); | |
1625 | enic->netdev = netdev; | |
1626 | enic->pdev = pdev; | |
1627 | ||
1628 | /* Setup PCI resources | |
1629 | */ | |
1630 | ||
1631 | err = pci_enable_device(pdev); | |
1632 | if (err) { | |
1633 | printk(KERN_ERR PFX | |
1634 | "Cannot enable PCI device, aborting.\n"); | |
1635 | goto err_out_free_netdev; | |
1636 | } | |
1637 | ||
1638 | err = pci_request_regions(pdev, DRV_NAME); | |
1639 | if (err) { | |
1640 | printk(KERN_ERR PFX | |
1641 | "Cannot request PCI regions, aborting.\n"); | |
1642 | goto err_out_disable_device; | |
1643 | } | |
1644 | ||
1645 | pci_set_master(pdev); | |
1646 | ||
1647 | /* Query PCI controller on system for DMA addressing | |
1648 | * limitation for the device. Try 40-bit first, and | |
1649 | * fail to 32-bit. | |
1650 | */ | |
1651 | ||
1652 | err = pci_set_dma_mask(pdev, DMA_40BIT_MASK); | |
1653 | if (err) { | |
1654 | err = pci_set_dma_mask(pdev, DMA_32BIT_MASK); | |
1655 | if (err) { | |
1656 | printk(KERN_ERR PFX | |
1657 | "No usable DMA configuration, aborting.\n"); | |
1658 | goto err_out_release_regions; | |
1659 | } | |
1660 | err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK); | |
1661 | if (err) { | |
1662 | printk(KERN_ERR PFX | |
1663 | "Unable to obtain 32-bit DMA " | |
1664 | "for consistent allocations, aborting.\n"); | |
1665 | goto err_out_release_regions; | |
1666 | } | |
1667 | } else { | |
1668 | err = pci_set_consistent_dma_mask(pdev, DMA_40BIT_MASK); | |
1669 | if (err) { | |
1670 | printk(KERN_ERR PFX | |
1671 | "Unable to obtain 40-bit DMA " | |
1672 | "for consistent allocations, aborting.\n"); | |
1673 | goto err_out_release_regions; | |
1674 | } | |
1675 | using_dac = 1; | |
1676 | } | |
1677 | ||
1678 | /* Map vNIC resources from BAR0 | |
1679 | */ | |
1680 | ||
1681 | if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM)) { | |
1682 | printk(KERN_ERR PFX | |
1683 | "BAR0 not memory-map'able, aborting.\n"); | |
1684 | err = -ENODEV; | |
1685 | goto err_out_release_regions; | |
1686 | } | |
1687 | ||
1688 | enic->bar0.vaddr = pci_iomap(pdev, 0, enic->bar0.len); | |
1689 | enic->bar0.bus_addr = pci_resource_start(pdev, 0); | |
1690 | enic->bar0.len = pci_resource_len(pdev, 0); | |
1691 | ||
1692 | if (!enic->bar0.vaddr) { | |
1693 | printk(KERN_ERR PFX | |
1694 | "Cannot memory-map BAR0 res hdr, aborting.\n"); | |
1695 | err = -ENODEV; | |
1696 | goto err_out_release_regions; | |
1697 | } | |
1698 | ||
1699 | /* Register vNIC device | |
1700 | */ | |
1701 | ||
1702 | enic->vdev = vnic_dev_register(NULL, enic, pdev, &enic->bar0); | |
1703 | if (!enic->vdev) { | |
1704 | printk(KERN_ERR PFX | |
1705 | "vNIC registration failed, aborting.\n"); | |
1706 | err = -ENODEV; | |
1707 | goto err_out_iounmap; | |
1708 | } | |
1709 | ||
1710 | /* Issue device open to get device in known state | |
1711 | */ | |
1712 | ||
1713 | err = enic_dev_open(enic); | |
1714 | if (err) { | |
1715 | printk(KERN_ERR PFX | |
1716 | "vNIC dev open failed, aborting.\n"); | |
1717 | goto err_out_vnic_unregister; | |
1718 | } | |
1719 | ||
1720 | /* Issue device init to initialize the vnic-to-switch link. | |
1721 | * We'll start with carrier off and wait for link UP | |
1722 | * notification later to turn on carrier. We don't need | |
1723 | * to wait here for the vnic-to-switch link initialization | |
1724 | * to complete; link UP notification is the indication that | |
1725 | * the process is complete. | |
1726 | */ | |
1727 | ||
1728 | netif_carrier_off(netdev); | |
1729 | ||
1730 | err = vnic_dev_init(enic->vdev, 0); | |
1731 | if (err) { | |
1732 | printk(KERN_ERR PFX | |
1733 | "vNIC dev init failed, aborting.\n"); | |
1734 | goto err_out_dev_close; | |
1735 | } | |
1736 | ||
1737 | /* Get vNIC configuration | |
1738 | */ | |
1739 | ||
1740 | err = enic_get_vnic_config(enic); | |
1741 | if (err) { | |
1742 | printk(KERN_ERR PFX | |
1743 | "Get vNIC configuration failed, aborting.\n"); | |
1744 | goto err_out_dev_close; | |
1745 | } | |
1746 | ||
1747 | /* Get available resource counts | |
1748 | */ | |
1749 | ||
1750 | enic_get_res_counts(enic); | |
1751 | ||
1752 | /* Set interrupt mode based on resource counts and system | |
1753 | * capabilities | |
1754 | */ | |
1755 | ||
1756 | err = enic_set_intr_mode(enic); | |
1757 | if (err) { | |
1758 | printk(KERN_ERR PFX | |
1759 | "Failed to set intr mode, aborting.\n"); | |
1760 | goto err_out_dev_close; | |
1761 | } | |
1762 | ||
1763 | /* Allocate and configure vNIC resources | |
1764 | */ | |
1765 | ||
1766 | err = enic_alloc_vnic_resources(enic); | |
1767 | if (err) { | |
1768 | printk(KERN_ERR PFX | |
1769 | "Failed to alloc vNIC resources, aborting.\n"); | |
1770 | goto err_out_free_vnic_resources; | |
1771 | } | |
1772 | ||
1773 | enic_init_vnic_resources(enic); | |
1774 | ||
1775 | /* Enable VLAN tag stripping. RSS not enabled (yet). | |
1776 | */ | |
1777 | ||
1778 | err = enic_set_nic_cfg(enic, | |
1779 | rss_default_cpu, rss_hash_type, | |
1780 | rss_hash_bits, rss_base_cpu, | |
1781 | rss_enable, tso_ipid_split_en, | |
1782 | ig_vlan_strip_en); | |
1783 | if (err) { | |
1784 | printk(KERN_ERR PFX | |
1785 | "Failed to config nic, aborting.\n"); | |
1786 | goto err_out_free_vnic_resources; | |
1787 | } | |
1788 | ||
1789 | /* Setup notification timer, HW reset task, and locks | |
1790 | */ | |
1791 | ||
1792 | init_timer(&enic->notify_timer); | |
1793 | enic->notify_timer.function = enic_notify_timer; | |
1794 | enic->notify_timer.data = (unsigned long)enic; | |
1795 | ||
1796 | INIT_WORK(&enic->reset, enic_reset); | |
1797 | ||
1798 | for (i = 0; i < enic->wq_count; i++) | |
1799 | spin_lock_init(&enic->wq_lock[i]); | |
1800 | ||
1801 | spin_lock_init(&enic->devcmd_lock); | |
1802 | ||
1803 | /* Register net device | |
1804 | */ | |
1805 | ||
1806 | enic->port_mtu = enic->config.mtu; | |
1807 | (void)enic_change_mtu(netdev, enic->port_mtu); | |
1808 | ||
1809 | err = enic_set_mac_addr(netdev, enic->mac_addr); | |
1810 | if (err) { | |
1811 | printk(KERN_ERR PFX | |
1812 | "Invalid MAC address, aborting.\n"); | |
1813 | goto err_out_free_vnic_resources; | |
1814 | } | |
1815 | ||
1816 | netdev->open = enic_open; | |
1817 | netdev->stop = enic_stop; | |
1818 | netdev->hard_start_xmit = enic_hard_start_xmit; | |
1819 | netdev->get_stats = enic_get_stats; | |
1820 | netdev->set_multicast_list = enic_set_multicast_list; | |
1821 | netdev->change_mtu = enic_change_mtu; | |
1822 | netdev->vlan_rx_register = enic_vlan_rx_register; | |
1823 | netdev->vlan_rx_add_vid = enic_vlan_rx_add_vid; | |
1824 | netdev->vlan_rx_kill_vid = enic_vlan_rx_kill_vid; | |
1825 | netdev->tx_timeout = enic_tx_timeout; | |
1826 | netdev->watchdog_timeo = 2 * HZ; | |
1827 | netdev->ethtool_ops = &enic_ethtool_ops; | |
1828 | #ifdef CONFIG_NET_POLL_CONTROLLER | |
1829 | netdev->poll_controller = enic_poll_controller; | |
1830 | #endif | |
1831 | ||
1832 | switch (vnic_dev_get_intr_mode(enic->vdev)) { | |
1833 | default: | |
1834 | netif_napi_add(netdev, &enic->napi, enic_poll, 64); | |
1835 | break; | |
1836 | case VNIC_DEV_INTR_MODE_MSIX: | |
1837 | netif_napi_add(netdev, &enic->napi, enic_poll_msix, 64); | |
1838 | break; | |
1839 | } | |
1840 | ||
1841 | netdev->features |= NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX; | |
1842 | if (ENIC_SETTING(enic, TXCSUM)) | |
1843 | netdev->features |= NETIF_F_SG | NETIF_F_HW_CSUM; | |
1844 | if (ENIC_SETTING(enic, TSO)) | |
1845 | netdev->features |= NETIF_F_TSO | | |
1846 | NETIF_F_TSO6 | NETIF_F_TSO_ECN; | |
1847 | if (using_dac) | |
1848 | netdev->features |= NETIF_F_HIGHDMA; | |
1849 | ||
1850 | ||
1851 | enic->csum_rx_enabled = ENIC_SETTING(enic, RXCSUM); | |
1852 | ||
1853 | if (ENIC_SETTING(enic, LRO)) { | |
1854 | enic->lro_mgr.max_aggr = ENIC_LRO_MAX_AGGR; | |
1855 | enic->lro_mgr.max_desc = ENIC_LRO_MAX_DESC; | |
1856 | enic->lro_mgr.lro_arr = enic->lro_desc; | |
1857 | enic->lro_mgr.get_skb_header = enic_get_skb_header; | |
1858 | enic->lro_mgr.features = LRO_F_NAPI | LRO_F_EXTRACT_VLAN_ID; | |
1859 | enic->lro_mgr.dev = netdev; | |
1860 | enic->lro_mgr.ip_summed = CHECKSUM_COMPLETE; | |
1861 | enic->lro_mgr.ip_summed_aggr = CHECKSUM_UNNECESSARY; | |
1862 | } | |
1863 | ||
1864 | err = register_netdev(netdev); | |
1865 | if (err) { | |
1866 | printk(KERN_ERR PFX | |
1867 | "Cannot register net device, aborting.\n"); | |
1868 | goto err_out_free_vnic_resources; | |
1869 | } | |
1870 | ||
1871 | return 0; | |
1872 | ||
1873 | err_out_free_vnic_resources: | |
1874 | enic_free_vnic_resources(enic); | |
1875 | err_out_dev_close: | |
1876 | vnic_dev_close(enic->vdev); | |
1877 | err_out_vnic_unregister: | |
1878 | enic_clear_intr_mode(enic); | |
1879 | vnic_dev_unregister(enic->vdev); | |
1880 | err_out_iounmap: | |
1881 | enic_iounmap(enic); | |
1882 | err_out_release_regions: | |
1883 | pci_release_regions(pdev); | |
1884 | err_out_disable_device: | |
1885 | pci_disable_device(pdev); | |
1886 | err_out_free_netdev: | |
1887 | pci_set_drvdata(pdev, NULL); | |
1888 | free_netdev(netdev); | |
1889 | ||
1890 | return err; | |
1891 | } | |
1892 | ||
1893 | static void __devexit enic_remove(struct pci_dev *pdev) | |
1894 | { | |
1895 | struct net_device *netdev = pci_get_drvdata(pdev); | |
1896 | ||
1897 | if (netdev) { | |
1898 | struct enic *enic = netdev_priv(netdev); | |
1899 | ||
1900 | flush_scheduled_work(); | |
1901 | unregister_netdev(netdev); | |
1902 | enic_free_vnic_resources(enic); | |
1903 | vnic_dev_close(enic->vdev); | |
1904 | enic_clear_intr_mode(enic); | |
1905 | vnic_dev_unregister(enic->vdev); | |
1906 | enic_iounmap(enic); | |
1907 | pci_release_regions(pdev); | |
1908 | pci_disable_device(pdev); | |
1909 | pci_set_drvdata(pdev, NULL); | |
1910 | free_netdev(netdev); | |
1911 | } | |
1912 | } | |
1913 | ||
1914 | static struct pci_driver enic_driver = { | |
1915 | .name = DRV_NAME, | |
1916 | .id_table = enic_id_table, | |
1917 | .probe = enic_probe, | |
1918 | .remove = __devexit_p(enic_remove), | |
1919 | }; | |
1920 | ||
1921 | static int __init enic_init_module(void) | |
1922 | { | |
1923 | printk(KERN_INFO PFX "%s, ver %s\n", DRV_DESCRIPTION, DRV_VERSION); | |
1924 | ||
1925 | return pci_register_driver(&enic_driver); | |
1926 | } | |
1927 | ||
1928 | static void __exit enic_cleanup_module(void) | |
1929 | { | |
1930 | pci_unregister_driver(&enic_driver); | |
1931 | } | |
1932 | ||
1933 | module_init(enic_init_module); | |
1934 | module_exit(enic_cleanup_module); |