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01f2e4ea SF |
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> | |
b7c6bfb7 | 37 | #include <net/ip6_checksum.h> |
01f2e4ea SF |
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) | |
01f2e4ea SF |
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 | ||
25f0a061 | 170 | static int enic_get_sset_count(struct net_device *netdev, int sset) |
01f2e4ea | 171 | { |
25f0a061 SF |
172 | switch (sset) { |
173 | case ETH_SS_STATS: | |
174 | return enic_n_tx_stats + enic_n_rx_stats; | |
175 | default: | |
176 | return -EOPNOTSUPP; | |
177 | } | |
01f2e4ea SF |
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 | ||
25f0a061 SF |
207 | if (data && !ENIC_SETTING(enic, RXCSUM)) |
208 | return -EINVAL; | |
209 | ||
210 | enic->csum_rx_enabled = !!data; | |
01f2e4ea SF |
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 | ||
25f0a061 SF |
219 | if (data && !ENIC_SETTING(enic, TXCSUM)) |
220 | return -EINVAL; | |
221 | ||
222 | if (data) | |
01f2e4ea SF |
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 | ||
25f0a061 SF |
234 | if (data && !ENIC_SETTING(enic, TSO)) |
235 | return -EINVAL; | |
236 | ||
237 | if (data) | |
01f2e4ea SF |
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, | |
25f0a061 | 266 | .get_sset_count = enic_get_sset_count, |
01f2e4ea SF |
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, | |
86ca9db7 SF |
276 | .get_flags = ethtool_op_get_flags, |
277 | .set_flags = ethtool_op_set_flags, | |
01f2e4ea SF |
278 | }; |
279 | ||
280 | static void enic_free_wq_buf(struct vnic_wq *wq, struct vnic_wq_buf *buf) | |
281 | { | |
282 | struct enic *enic = vnic_dev_priv(wq->vdev); | |
283 | ||
284 | if (buf->sop) | |
285 | pci_unmap_single(enic->pdev, buf->dma_addr, | |
286 | buf->len, PCI_DMA_TODEVICE); | |
287 | else | |
288 | pci_unmap_page(enic->pdev, buf->dma_addr, | |
289 | buf->len, PCI_DMA_TODEVICE); | |
290 | ||
291 | if (buf->os_buf) | |
292 | dev_kfree_skb_any(buf->os_buf); | |
293 | } | |
294 | ||
295 | static void enic_wq_free_buf(struct vnic_wq *wq, | |
296 | struct cq_desc *cq_desc, struct vnic_wq_buf *buf, void *opaque) | |
297 | { | |
298 | enic_free_wq_buf(wq, buf); | |
299 | } | |
300 | ||
301 | static int enic_wq_service(struct vnic_dev *vdev, struct cq_desc *cq_desc, | |
302 | u8 type, u16 q_number, u16 completed_index, void *opaque) | |
303 | { | |
304 | struct enic *enic = vnic_dev_priv(vdev); | |
305 | ||
306 | spin_lock(&enic->wq_lock[q_number]); | |
307 | ||
308 | vnic_wq_service(&enic->wq[q_number], cq_desc, | |
309 | completed_index, enic_wq_free_buf, | |
310 | opaque); | |
311 | ||
312 | if (netif_queue_stopped(enic->netdev) && | |
313 | vnic_wq_desc_avail(&enic->wq[q_number]) >= MAX_SKB_FRAGS + 1) | |
314 | netif_wake_queue(enic->netdev); | |
315 | ||
316 | spin_unlock(&enic->wq_lock[q_number]); | |
317 | ||
318 | return 0; | |
319 | } | |
320 | ||
321 | static void enic_log_q_error(struct enic *enic) | |
322 | { | |
323 | unsigned int i; | |
324 | u32 error_status; | |
325 | ||
326 | for (i = 0; i < enic->wq_count; i++) { | |
327 | error_status = vnic_wq_error_status(&enic->wq[i]); | |
328 | if (error_status) | |
329 | printk(KERN_ERR PFX "%s: WQ[%d] error_status %d\n", | |
330 | enic->netdev->name, i, error_status); | |
331 | } | |
332 | ||
333 | for (i = 0; i < enic->rq_count; i++) { | |
334 | error_status = vnic_rq_error_status(&enic->rq[i]); | |
335 | if (error_status) | |
336 | printk(KERN_ERR PFX "%s: RQ[%d] error_status %d\n", | |
337 | enic->netdev->name, i, error_status); | |
338 | } | |
339 | } | |
340 | ||
341 | static void enic_link_check(struct enic *enic) | |
342 | { | |
343 | int link_status = vnic_dev_link_status(enic->vdev); | |
344 | int carrier_ok = netif_carrier_ok(enic->netdev); | |
345 | ||
346 | if (link_status && !carrier_ok) { | |
347 | printk(KERN_INFO PFX "%s: Link UP\n", enic->netdev->name); | |
348 | netif_carrier_on(enic->netdev); | |
349 | } else if (!link_status && carrier_ok) { | |
350 | printk(KERN_INFO PFX "%s: Link DOWN\n", enic->netdev->name); | |
351 | netif_carrier_off(enic->netdev); | |
352 | } | |
353 | } | |
354 | ||
355 | static void enic_mtu_check(struct enic *enic) | |
356 | { | |
357 | u32 mtu = vnic_dev_mtu(enic->vdev); | |
358 | ||
359 | if (mtu != enic->port_mtu) { | |
360 | if (mtu < enic->netdev->mtu) | |
361 | printk(KERN_WARNING PFX | |
362 | "%s: interface MTU (%d) set higher " | |
363 | "than switch port MTU (%d)\n", | |
364 | enic->netdev->name, enic->netdev->mtu, mtu); | |
365 | enic->port_mtu = mtu; | |
366 | } | |
367 | } | |
368 | ||
369 | static void enic_msglvl_check(struct enic *enic) | |
370 | { | |
371 | u32 msg_enable = vnic_dev_msg_lvl(enic->vdev); | |
372 | ||
373 | if (msg_enable != enic->msg_enable) { | |
374 | printk(KERN_INFO PFX "%s: msg lvl changed from 0x%x to 0x%x\n", | |
375 | enic->netdev->name, enic->msg_enable, msg_enable); | |
376 | enic->msg_enable = msg_enable; | |
377 | } | |
378 | } | |
379 | ||
380 | static void enic_notify_check(struct enic *enic) | |
381 | { | |
382 | enic_msglvl_check(enic); | |
383 | enic_mtu_check(enic); | |
384 | enic_link_check(enic); | |
385 | } | |
386 | ||
387 | #define ENIC_TEST_INTR(pba, i) (pba & (1 << i)) | |
388 | ||
389 | static irqreturn_t enic_isr_legacy(int irq, void *data) | |
390 | { | |
391 | struct net_device *netdev = data; | |
392 | struct enic *enic = netdev_priv(netdev); | |
393 | u32 pba; | |
394 | ||
395 | vnic_intr_mask(&enic->intr[ENIC_INTX_WQ_RQ]); | |
396 | ||
397 | pba = vnic_intr_legacy_pba(enic->legacy_pba); | |
398 | if (!pba) { | |
399 | vnic_intr_unmask(&enic->intr[ENIC_INTX_WQ_RQ]); | |
400 | return IRQ_NONE; /* not our interrupt */ | |
401 | } | |
402 | ||
403 | if (ENIC_TEST_INTR(pba, ENIC_INTX_NOTIFY)) | |
404 | enic_notify_check(enic); | |
405 | ||
406 | if (ENIC_TEST_INTR(pba, ENIC_INTX_ERR)) { | |
407 | enic_log_q_error(enic); | |
408 | /* schedule recovery from WQ/RQ error */ | |
409 | schedule_work(&enic->reset); | |
410 | return IRQ_HANDLED; | |
411 | } | |
412 | ||
413 | if (ENIC_TEST_INTR(pba, ENIC_INTX_WQ_RQ)) { | |
288379f0 BH |
414 | if (napi_schedule_prep(&enic->napi)) |
415 | __napi_schedule(&enic->napi); | |
01f2e4ea SF |
416 | } else { |
417 | vnic_intr_unmask(&enic->intr[ENIC_INTX_WQ_RQ]); | |
418 | } | |
419 | ||
420 | return IRQ_HANDLED; | |
421 | } | |
422 | ||
423 | static irqreturn_t enic_isr_msi(int irq, void *data) | |
424 | { | |
425 | struct enic *enic = data; | |
426 | ||
427 | /* With MSI, there is no sharing of interrupts, so this is | |
428 | * our interrupt and there is no need to ack it. The device | |
429 | * is not providing per-vector masking, so the OS will not | |
430 | * write to PCI config space to mask/unmask the interrupt. | |
431 | * We're using mask_on_assertion for MSI, so the device | |
432 | * automatically masks the interrupt when the interrupt is | |
433 | * generated. Later, when exiting polling, the interrupt | |
434 | * will be unmasked (see enic_poll). | |
435 | * | |
436 | * Also, the device uses the same PCIe Traffic Class (TC) | |
437 | * for Memory Write data and MSI, so there are no ordering | |
438 | * issues; the MSI will always arrive at the Root Complex | |
439 | * _after_ corresponding Memory Writes (i.e. descriptor | |
440 | * writes). | |
441 | */ | |
442 | ||
288379f0 | 443 | napi_schedule(&enic->napi); |
01f2e4ea SF |
444 | |
445 | return IRQ_HANDLED; | |
446 | } | |
447 | ||
448 | static irqreturn_t enic_isr_msix_rq(int irq, void *data) | |
449 | { | |
450 | struct enic *enic = data; | |
451 | ||
452 | /* schedule NAPI polling for RQ cleanup */ | |
288379f0 | 453 | napi_schedule(&enic->napi); |
01f2e4ea SF |
454 | |
455 | return IRQ_HANDLED; | |
456 | } | |
457 | ||
458 | static irqreturn_t enic_isr_msix_wq(int irq, void *data) | |
459 | { | |
460 | struct enic *enic = data; | |
461 | unsigned int wq_work_to_do = -1; /* no limit */ | |
462 | unsigned int wq_work_done; | |
463 | ||
464 | wq_work_done = vnic_cq_service(&enic->cq[ENIC_CQ_WQ], | |
465 | wq_work_to_do, enic_wq_service, NULL); | |
466 | ||
467 | vnic_intr_return_credits(&enic->intr[ENIC_MSIX_WQ], | |
468 | wq_work_done, | |
469 | 1 /* unmask intr */, | |
470 | 1 /* reset intr timer */); | |
471 | ||
472 | return IRQ_HANDLED; | |
473 | } | |
474 | ||
475 | static irqreturn_t enic_isr_msix_err(int irq, void *data) | |
476 | { | |
477 | struct enic *enic = data; | |
478 | ||
479 | enic_log_q_error(enic); | |
480 | ||
481 | /* schedule recovery from WQ/RQ error */ | |
482 | schedule_work(&enic->reset); | |
483 | ||
484 | return IRQ_HANDLED; | |
485 | } | |
486 | ||
487 | static irqreturn_t enic_isr_msix_notify(int irq, void *data) | |
488 | { | |
489 | struct enic *enic = data; | |
490 | ||
491 | enic_notify_check(enic); | |
492 | vnic_intr_unmask(&enic->intr[ENIC_MSIX_NOTIFY]); | |
493 | ||
494 | return IRQ_HANDLED; | |
495 | } | |
496 | ||
497 | static inline void enic_queue_wq_skb_cont(struct enic *enic, | |
498 | struct vnic_wq *wq, struct sk_buff *skb, | |
499 | unsigned int len_left) | |
500 | { | |
501 | skb_frag_t *frag; | |
502 | ||
503 | /* Queue additional data fragments */ | |
504 | for (frag = skb_shinfo(skb)->frags; len_left; frag++) { | |
505 | len_left -= frag->size; | |
506 | enic_queue_wq_desc_cont(wq, skb, | |
507 | pci_map_page(enic->pdev, frag->page, | |
508 | frag->page_offset, frag->size, | |
509 | PCI_DMA_TODEVICE), | |
510 | frag->size, | |
511 | (len_left == 0)); /* EOP? */ | |
512 | } | |
513 | } | |
514 | ||
515 | static inline void enic_queue_wq_skb_vlan(struct enic *enic, | |
516 | struct vnic_wq *wq, struct sk_buff *skb, | |
517 | int vlan_tag_insert, unsigned int vlan_tag) | |
518 | { | |
519 | unsigned int head_len = skb_headlen(skb); | |
520 | unsigned int len_left = skb->len - head_len; | |
521 | int eop = (len_left == 0); | |
522 | ||
523 | /* Queue the main skb fragment */ | |
524 | enic_queue_wq_desc(wq, skb, | |
525 | pci_map_single(enic->pdev, skb->data, | |
526 | head_len, PCI_DMA_TODEVICE), | |
527 | head_len, | |
528 | vlan_tag_insert, vlan_tag, | |
529 | eop); | |
530 | ||
531 | if (!eop) | |
532 | enic_queue_wq_skb_cont(enic, wq, skb, len_left); | |
533 | } | |
534 | ||
535 | static inline void enic_queue_wq_skb_csum_l4(struct enic *enic, | |
536 | struct vnic_wq *wq, struct sk_buff *skb, | |
537 | int vlan_tag_insert, unsigned int vlan_tag) | |
538 | { | |
539 | unsigned int head_len = skb_headlen(skb); | |
540 | unsigned int len_left = skb->len - head_len; | |
541 | unsigned int hdr_len = skb_transport_offset(skb); | |
542 | unsigned int csum_offset = hdr_len + skb->csum_offset; | |
543 | int eop = (len_left == 0); | |
544 | ||
545 | /* Queue the main skb fragment */ | |
546 | enic_queue_wq_desc_csum_l4(wq, skb, | |
547 | pci_map_single(enic->pdev, skb->data, | |
548 | head_len, PCI_DMA_TODEVICE), | |
549 | head_len, | |
550 | csum_offset, | |
551 | hdr_len, | |
552 | vlan_tag_insert, vlan_tag, | |
553 | eop); | |
554 | ||
555 | if (!eop) | |
556 | enic_queue_wq_skb_cont(enic, wq, skb, len_left); | |
557 | } | |
558 | ||
559 | static inline void enic_queue_wq_skb_tso(struct enic *enic, | |
560 | struct vnic_wq *wq, struct sk_buff *skb, unsigned int mss, | |
561 | int vlan_tag_insert, unsigned int vlan_tag) | |
562 | { | |
563 | unsigned int head_len = skb_headlen(skb); | |
564 | unsigned int len_left = skb->len - head_len; | |
565 | unsigned int hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb); | |
566 | int eop = (len_left == 0); | |
567 | ||
568 | /* Preload TCP csum field with IP pseudo hdr calculated | |
569 | * with IP length set to zero. HW will later add in length | |
570 | * to each TCP segment resulting from the TSO. | |
571 | */ | |
572 | ||
09640e63 | 573 | if (skb->protocol == cpu_to_be16(ETH_P_IP)) { |
01f2e4ea SF |
574 | ip_hdr(skb)->check = 0; |
575 | tcp_hdr(skb)->check = ~csum_tcpudp_magic(ip_hdr(skb)->saddr, | |
576 | ip_hdr(skb)->daddr, 0, IPPROTO_TCP, 0); | |
09640e63 | 577 | } else if (skb->protocol == cpu_to_be16(ETH_P_IPV6)) { |
01f2e4ea SF |
578 | tcp_hdr(skb)->check = ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr, |
579 | &ipv6_hdr(skb)->daddr, 0, IPPROTO_TCP, 0); | |
580 | } | |
581 | ||
582 | /* Queue the main skb fragment */ | |
583 | enic_queue_wq_desc_tso(wq, skb, | |
584 | pci_map_single(enic->pdev, skb->data, | |
585 | head_len, PCI_DMA_TODEVICE), | |
586 | head_len, | |
587 | mss, hdr_len, | |
588 | vlan_tag_insert, vlan_tag, | |
589 | eop); | |
590 | ||
591 | if (!eop) | |
592 | enic_queue_wq_skb_cont(enic, wq, skb, len_left); | |
593 | } | |
594 | ||
595 | static inline void enic_queue_wq_skb(struct enic *enic, | |
596 | struct vnic_wq *wq, struct sk_buff *skb) | |
597 | { | |
598 | unsigned int mss = skb_shinfo(skb)->gso_size; | |
599 | unsigned int vlan_tag = 0; | |
600 | int vlan_tag_insert = 0; | |
601 | ||
602 | if (enic->vlan_group && vlan_tx_tag_present(skb)) { | |
603 | /* VLAN tag from trunking driver */ | |
604 | vlan_tag_insert = 1; | |
605 | vlan_tag = vlan_tx_tag_get(skb); | |
606 | } | |
607 | ||
608 | if (mss) | |
609 | enic_queue_wq_skb_tso(enic, wq, skb, mss, | |
610 | vlan_tag_insert, vlan_tag); | |
611 | else if (skb->ip_summed == CHECKSUM_PARTIAL) | |
612 | enic_queue_wq_skb_csum_l4(enic, wq, skb, | |
613 | vlan_tag_insert, vlan_tag); | |
614 | else | |
615 | enic_queue_wq_skb_vlan(enic, wq, skb, | |
616 | vlan_tag_insert, vlan_tag); | |
617 | } | |
618 | ||
619 | /* netif_tx_lock held, process context with BHs disabled */ | |
620 | static int enic_hard_start_xmit(struct sk_buff *skb, struct net_device *netdev) | |
621 | { | |
622 | struct enic *enic = netdev_priv(netdev); | |
623 | struct vnic_wq *wq = &enic->wq[0]; | |
624 | unsigned long flags; | |
625 | ||
626 | if (skb->len <= 0) { | |
627 | dev_kfree_skb(skb); | |
628 | return NETDEV_TX_OK; | |
629 | } | |
630 | ||
631 | /* Non-TSO sends must fit within ENIC_NON_TSO_MAX_DESC descs, | |
632 | * which is very likely. In the off chance it's going to take | |
633 | * more than * ENIC_NON_TSO_MAX_DESC, linearize the skb. | |
634 | */ | |
635 | ||
636 | if (skb_shinfo(skb)->gso_size == 0 && | |
637 | skb_shinfo(skb)->nr_frags + 1 > ENIC_NON_TSO_MAX_DESC && | |
638 | skb_linearize(skb)) { | |
639 | dev_kfree_skb(skb); | |
640 | return NETDEV_TX_OK; | |
641 | } | |
642 | ||
643 | spin_lock_irqsave(&enic->wq_lock[0], flags); | |
644 | ||
645 | if (vnic_wq_desc_avail(wq) < skb_shinfo(skb)->nr_frags + 1) { | |
646 | netif_stop_queue(netdev); | |
647 | /* This is a hard error, log it */ | |
648 | printk(KERN_ERR PFX "%s: BUG! Tx ring full when " | |
649 | "queue awake!\n", netdev->name); | |
650 | spin_unlock_irqrestore(&enic->wq_lock[0], flags); | |
651 | return NETDEV_TX_BUSY; | |
652 | } | |
653 | ||
654 | enic_queue_wq_skb(enic, wq, skb); | |
655 | ||
656 | if (vnic_wq_desc_avail(wq) < MAX_SKB_FRAGS + 1) | |
657 | netif_stop_queue(netdev); | |
658 | ||
659 | netdev->trans_start = jiffies; | |
660 | ||
661 | spin_unlock_irqrestore(&enic->wq_lock[0], flags); | |
662 | ||
663 | return NETDEV_TX_OK; | |
664 | } | |
665 | ||
666 | /* dev_base_lock rwlock held, nominally process context */ | |
667 | static struct net_device_stats *enic_get_stats(struct net_device *netdev) | |
668 | { | |
669 | struct enic *enic = netdev_priv(netdev); | |
25f0a061 | 670 | struct net_device_stats *net_stats = &netdev->stats; |
01f2e4ea SF |
671 | struct vnic_stats *stats; |
672 | ||
673 | spin_lock(&enic->devcmd_lock); | |
674 | vnic_dev_stats_dump(enic->vdev, &stats); | |
675 | spin_unlock(&enic->devcmd_lock); | |
676 | ||
25f0a061 SF |
677 | net_stats->tx_packets = stats->tx.tx_frames_ok; |
678 | net_stats->tx_bytes = stats->tx.tx_bytes_ok; | |
679 | net_stats->tx_errors = stats->tx.tx_errors; | |
680 | net_stats->tx_dropped = stats->tx.tx_drops; | |
01f2e4ea | 681 | |
25f0a061 SF |
682 | net_stats->rx_packets = stats->rx.rx_frames_ok; |
683 | net_stats->rx_bytes = stats->rx.rx_bytes_ok; | |
684 | net_stats->rx_errors = stats->rx.rx_errors; | |
685 | net_stats->multicast = stats->rx.rx_multicast_frames_ok; | |
686 | net_stats->rx_crc_errors = stats->rx.rx_crc_errors; | |
687 | net_stats->rx_dropped = stats->rx.rx_no_bufs; | |
01f2e4ea | 688 | |
25f0a061 | 689 | return net_stats; |
01f2e4ea SF |
690 | } |
691 | ||
692 | static void enic_reset_mcaddrs(struct enic *enic) | |
693 | { | |
694 | enic->mc_count = 0; | |
695 | } | |
696 | ||
697 | static int enic_set_mac_addr(struct net_device *netdev, char *addr) | |
698 | { | |
699 | if (!is_valid_ether_addr(addr)) | |
700 | return -EADDRNOTAVAIL; | |
701 | ||
702 | memcpy(netdev->dev_addr, addr, netdev->addr_len); | |
703 | ||
704 | return 0; | |
705 | } | |
706 | ||
707 | /* netif_tx_lock held, BHs disabled */ | |
708 | static void enic_set_multicast_list(struct net_device *netdev) | |
709 | { | |
710 | struct enic *enic = netdev_priv(netdev); | |
711 | struct dev_mc_list *list = netdev->mc_list; | |
712 | int directed = 1; | |
713 | int multicast = (netdev->flags & IFF_MULTICAST) ? 1 : 0; | |
714 | int broadcast = (netdev->flags & IFF_BROADCAST) ? 1 : 0; | |
715 | int promisc = (netdev->flags & IFF_PROMISC) ? 1 : 0; | |
716 | int allmulti = (netdev->flags & IFF_ALLMULTI) || | |
717 | (netdev->mc_count > ENIC_MULTICAST_PERFECT_FILTERS); | |
718 | u8 mc_addr[ENIC_MULTICAST_PERFECT_FILTERS][ETH_ALEN]; | |
719 | unsigned int mc_count = netdev->mc_count; | |
720 | unsigned int i, j; | |
721 | ||
722 | if (mc_count > ENIC_MULTICAST_PERFECT_FILTERS) | |
723 | mc_count = ENIC_MULTICAST_PERFECT_FILTERS; | |
724 | ||
725 | spin_lock(&enic->devcmd_lock); | |
726 | ||
727 | vnic_dev_packet_filter(enic->vdev, directed, | |
728 | multicast, broadcast, promisc, allmulti); | |
729 | ||
730 | /* Is there an easier way? Trying to minimize to | |
731 | * calls to add/del multicast addrs. We keep the | |
732 | * addrs from the last call in enic->mc_addr and | |
733 | * look for changes to add/del. | |
734 | */ | |
735 | ||
736 | for (i = 0; list && i < mc_count; i++) { | |
737 | memcpy(mc_addr[i], list->dmi_addr, ETH_ALEN); | |
738 | list = list->next; | |
739 | } | |
740 | ||
741 | for (i = 0; i < enic->mc_count; i++) { | |
742 | for (j = 0; j < mc_count; j++) | |
743 | if (compare_ether_addr(enic->mc_addr[i], | |
744 | mc_addr[j]) == 0) | |
745 | break; | |
746 | if (j == mc_count) | |
747 | enic_del_multicast_addr(enic, enic->mc_addr[i]); | |
748 | } | |
749 | ||
750 | for (i = 0; i < mc_count; i++) { | |
751 | for (j = 0; j < enic->mc_count; j++) | |
752 | if (compare_ether_addr(mc_addr[i], | |
753 | enic->mc_addr[j]) == 0) | |
754 | break; | |
755 | if (j == enic->mc_count) | |
756 | enic_add_multicast_addr(enic, mc_addr[i]); | |
757 | } | |
758 | ||
759 | /* Save the list to compare against next time | |
760 | */ | |
761 | ||
762 | for (i = 0; i < mc_count; i++) | |
763 | memcpy(enic->mc_addr[i], mc_addr[i], ETH_ALEN); | |
764 | ||
765 | enic->mc_count = mc_count; | |
766 | ||
767 | spin_unlock(&enic->devcmd_lock); | |
768 | } | |
769 | ||
770 | /* rtnl lock is held */ | |
771 | static void enic_vlan_rx_register(struct net_device *netdev, | |
772 | struct vlan_group *vlan_group) | |
773 | { | |
774 | struct enic *enic = netdev_priv(netdev); | |
775 | enic->vlan_group = vlan_group; | |
776 | } | |
777 | ||
778 | /* rtnl lock is held */ | |
779 | static void enic_vlan_rx_add_vid(struct net_device *netdev, u16 vid) | |
780 | { | |
781 | struct enic *enic = netdev_priv(netdev); | |
782 | ||
783 | spin_lock(&enic->devcmd_lock); | |
784 | enic_add_vlan(enic, vid); | |
785 | spin_unlock(&enic->devcmd_lock); | |
786 | } | |
787 | ||
788 | /* rtnl lock is held */ | |
789 | static void enic_vlan_rx_kill_vid(struct net_device *netdev, u16 vid) | |
790 | { | |
791 | struct enic *enic = netdev_priv(netdev); | |
792 | ||
793 | spin_lock(&enic->devcmd_lock); | |
794 | enic_del_vlan(enic, vid); | |
795 | spin_unlock(&enic->devcmd_lock); | |
796 | } | |
797 | ||
798 | /* netif_tx_lock held, BHs disabled */ | |
799 | static void enic_tx_timeout(struct net_device *netdev) | |
800 | { | |
801 | struct enic *enic = netdev_priv(netdev); | |
802 | schedule_work(&enic->reset); | |
803 | } | |
804 | ||
805 | static void enic_free_rq_buf(struct vnic_rq *rq, struct vnic_rq_buf *buf) | |
806 | { | |
807 | struct enic *enic = vnic_dev_priv(rq->vdev); | |
808 | ||
809 | if (!buf->os_buf) | |
810 | return; | |
811 | ||
812 | pci_unmap_single(enic->pdev, buf->dma_addr, | |
813 | buf->len, PCI_DMA_FROMDEVICE); | |
814 | dev_kfree_skb_any(buf->os_buf); | |
815 | } | |
816 | ||
817 | static inline struct sk_buff *enic_rq_alloc_skb(unsigned int size) | |
818 | { | |
819 | struct sk_buff *skb; | |
820 | ||
821 | skb = dev_alloc_skb(size + NET_IP_ALIGN); | |
822 | ||
823 | if (skb) | |
824 | skb_reserve(skb, NET_IP_ALIGN); | |
825 | ||
826 | return skb; | |
827 | } | |
828 | ||
829 | static int enic_rq_alloc_buf(struct vnic_rq *rq) | |
830 | { | |
831 | struct enic *enic = vnic_dev_priv(rq->vdev); | |
832 | struct sk_buff *skb; | |
833 | unsigned int len = enic->netdev->mtu + ETH_HLEN; | |
834 | unsigned int os_buf_index = 0; | |
835 | dma_addr_t dma_addr; | |
836 | ||
837 | skb = enic_rq_alloc_skb(len); | |
838 | if (!skb) | |
839 | return -ENOMEM; | |
840 | ||
841 | dma_addr = pci_map_single(enic->pdev, skb->data, | |
842 | len, PCI_DMA_FROMDEVICE); | |
843 | ||
844 | enic_queue_rq_desc(rq, skb, os_buf_index, | |
845 | dma_addr, len); | |
846 | ||
847 | return 0; | |
848 | } | |
849 | ||
850 | static int enic_get_skb_header(struct sk_buff *skb, void **iphdr, | |
851 | void **tcph, u64 *hdr_flags, void *priv) | |
852 | { | |
853 | struct cq_enet_rq_desc *cq_desc = priv; | |
854 | unsigned int ip_len; | |
855 | struct iphdr *iph; | |
856 | ||
857 | u8 type, color, eop, sop, ingress_port, vlan_stripped; | |
858 | u8 fcoe, fcoe_sof, fcoe_fc_crc_ok, fcoe_enc_error, fcoe_eof; | |
859 | u8 tcp_udp_csum_ok, udp, tcp, ipv4_csum_ok; | |
860 | u8 ipv6, ipv4, ipv4_fragment, fcs_ok, rss_type, csum_not_calc; | |
861 | u8 packet_error; | |
862 | u16 q_number, completed_index, bytes_written, vlan, checksum; | |
863 | u32 rss_hash; | |
864 | ||
865 | cq_enet_rq_desc_dec(cq_desc, | |
866 | &type, &color, &q_number, &completed_index, | |
867 | &ingress_port, &fcoe, &eop, &sop, &rss_type, | |
868 | &csum_not_calc, &rss_hash, &bytes_written, | |
869 | &packet_error, &vlan_stripped, &vlan, &checksum, | |
870 | &fcoe_sof, &fcoe_fc_crc_ok, &fcoe_enc_error, | |
871 | &fcoe_eof, &tcp_udp_csum_ok, &udp, &tcp, | |
872 | &ipv4_csum_ok, &ipv6, &ipv4, &ipv4_fragment, | |
873 | &fcs_ok); | |
874 | ||
875 | if (!(ipv4 && tcp && !ipv4_fragment)) | |
876 | return -1; | |
877 | ||
878 | skb_reset_network_header(skb); | |
879 | iph = ip_hdr(skb); | |
880 | ||
881 | ip_len = ip_hdrlen(skb); | |
882 | skb_set_transport_header(skb, ip_len); | |
883 | ||
884 | /* check if ip header and tcp header are complete */ | |
885 | if (ntohs(iph->tot_len) < ip_len + tcp_hdrlen(skb)) | |
886 | return -1; | |
887 | ||
888 | *hdr_flags = LRO_IPV4 | LRO_TCP; | |
889 | *tcph = tcp_hdr(skb); | |
890 | *iphdr = iph; | |
891 | ||
892 | return 0; | |
893 | } | |
894 | ||
895 | static void enic_rq_indicate_buf(struct vnic_rq *rq, | |
896 | struct cq_desc *cq_desc, struct vnic_rq_buf *buf, | |
897 | int skipped, void *opaque) | |
898 | { | |
899 | struct enic *enic = vnic_dev_priv(rq->vdev); | |
86ca9db7 | 900 | struct net_device *netdev = enic->netdev; |
01f2e4ea SF |
901 | struct sk_buff *skb; |
902 | ||
903 | u8 type, color, eop, sop, ingress_port, vlan_stripped; | |
904 | u8 fcoe, fcoe_sof, fcoe_fc_crc_ok, fcoe_enc_error, fcoe_eof; | |
905 | u8 tcp_udp_csum_ok, udp, tcp, ipv4_csum_ok; | |
906 | u8 ipv6, ipv4, ipv4_fragment, fcs_ok, rss_type, csum_not_calc; | |
907 | u8 packet_error; | |
908 | u16 q_number, completed_index, bytes_written, vlan, checksum; | |
909 | u32 rss_hash; | |
910 | ||
911 | if (skipped) | |
912 | return; | |
913 | ||
914 | skb = buf->os_buf; | |
915 | prefetch(skb->data - NET_IP_ALIGN); | |
916 | pci_unmap_single(enic->pdev, buf->dma_addr, | |
917 | buf->len, PCI_DMA_FROMDEVICE); | |
918 | ||
919 | cq_enet_rq_desc_dec((struct cq_enet_rq_desc *)cq_desc, | |
920 | &type, &color, &q_number, &completed_index, | |
921 | &ingress_port, &fcoe, &eop, &sop, &rss_type, | |
922 | &csum_not_calc, &rss_hash, &bytes_written, | |
923 | &packet_error, &vlan_stripped, &vlan, &checksum, | |
924 | &fcoe_sof, &fcoe_fc_crc_ok, &fcoe_enc_error, | |
925 | &fcoe_eof, &tcp_udp_csum_ok, &udp, &tcp, | |
926 | &ipv4_csum_ok, &ipv6, &ipv4, &ipv4_fragment, | |
927 | &fcs_ok); | |
928 | ||
929 | if (packet_error) { | |
930 | ||
931 | if (bytes_written > 0 && !fcs_ok) { | |
932 | if (net_ratelimit()) | |
933 | printk(KERN_ERR PFX | |
934 | "%s: packet error: bad FCS\n", | |
86ca9db7 | 935 | netdev->name); |
01f2e4ea SF |
936 | } |
937 | ||
938 | dev_kfree_skb_any(skb); | |
939 | ||
940 | return; | |
941 | } | |
942 | ||
943 | if (eop && bytes_written > 0) { | |
944 | ||
945 | /* Good receive | |
946 | */ | |
947 | ||
948 | skb_put(skb, bytes_written); | |
86ca9db7 | 949 | skb->protocol = eth_type_trans(skb, netdev); |
01f2e4ea SF |
950 | |
951 | if (enic->csum_rx_enabled && !csum_not_calc) { | |
952 | skb->csum = htons(checksum); | |
953 | skb->ip_summed = CHECKSUM_COMPLETE; | |
954 | } | |
955 | ||
86ca9db7 | 956 | skb->dev = netdev; |
01f2e4ea SF |
957 | |
958 | if (enic->vlan_group && vlan_stripped) { | |
959 | ||
86ca9db7 | 960 | if ((netdev->features & NETIF_F_LRO) && ipv4) |
01f2e4ea SF |
961 | lro_vlan_hwaccel_receive_skb(&enic->lro_mgr, |
962 | skb, enic->vlan_group, | |
963 | vlan, cq_desc); | |
964 | else | |
965 | vlan_hwaccel_receive_skb(skb, | |
966 | enic->vlan_group, vlan); | |
967 | ||
968 | } else { | |
969 | ||
86ca9db7 | 970 | if ((netdev->features & NETIF_F_LRO) && ipv4) |
01f2e4ea SF |
971 | lro_receive_skb(&enic->lro_mgr, skb, cq_desc); |
972 | else | |
973 | netif_receive_skb(skb); | |
974 | ||
975 | } | |
976 | ||
977 | } else { | |
978 | ||
979 | /* Buffer overflow | |
980 | */ | |
981 | ||
982 | dev_kfree_skb_any(skb); | |
983 | } | |
984 | } | |
985 | ||
986 | static int enic_rq_service(struct vnic_dev *vdev, struct cq_desc *cq_desc, | |
987 | u8 type, u16 q_number, u16 completed_index, void *opaque) | |
988 | { | |
989 | struct enic *enic = vnic_dev_priv(vdev); | |
990 | ||
991 | vnic_rq_service(&enic->rq[q_number], cq_desc, | |
992 | completed_index, VNIC_RQ_RETURN_DESC, | |
993 | enic_rq_indicate_buf, opaque); | |
994 | ||
995 | return 0; | |
996 | } | |
997 | ||
998 | static void enic_rq_drop_buf(struct vnic_rq *rq, | |
999 | struct cq_desc *cq_desc, struct vnic_rq_buf *buf, | |
1000 | int skipped, void *opaque) | |
1001 | { | |
1002 | struct enic *enic = vnic_dev_priv(rq->vdev); | |
1003 | struct sk_buff *skb = buf->os_buf; | |
1004 | ||
1005 | if (skipped) | |
1006 | return; | |
1007 | ||
1008 | pci_unmap_single(enic->pdev, buf->dma_addr, | |
1009 | buf->len, PCI_DMA_FROMDEVICE); | |
1010 | ||
1011 | dev_kfree_skb_any(skb); | |
1012 | } | |
1013 | ||
1014 | static int enic_rq_service_drop(struct vnic_dev *vdev, struct cq_desc *cq_desc, | |
1015 | u8 type, u16 q_number, u16 completed_index, void *opaque) | |
1016 | { | |
1017 | struct enic *enic = vnic_dev_priv(vdev); | |
1018 | ||
1019 | vnic_rq_service(&enic->rq[q_number], cq_desc, | |
1020 | completed_index, VNIC_RQ_RETURN_DESC, | |
1021 | enic_rq_drop_buf, opaque); | |
1022 | ||
1023 | return 0; | |
1024 | } | |
1025 | ||
1026 | static int enic_poll(struct napi_struct *napi, int budget) | |
1027 | { | |
1028 | struct enic *enic = container_of(napi, struct enic, napi); | |
1029 | struct net_device *netdev = enic->netdev; | |
1030 | unsigned int rq_work_to_do = budget; | |
1031 | unsigned int wq_work_to_do = -1; /* no limit */ | |
1032 | unsigned int work_done, rq_work_done, wq_work_done; | |
1033 | ||
1034 | /* Service RQ (first) and WQ | |
1035 | */ | |
1036 | ||
1037 | rq_work_done = vnic_cq_service(&enic->cq[ENIC_CQ_RQ], | |
1038 | rq_work_to_do, enic_rq_service, NULL); | |
1039 | ||
1040 | wq_work_done = vnic_cq_service(&enic->cq[ENIC_CQ_WQ], | |
1041 | wq_work_to_do, enic_wq_service, NULL); | |
1042 | ||
1043 | /* Accumulate intr event credits for this polling | |
1044 | * cycle. An intr event is the completion of a | |
1045 | * a WQ or RQ packet. | |
1046 | */ | |
1047 | ||
1048 | work_done = rq_work_done + wq_work_done; | |
1049 | ||
1050 | if (work_done > 0) | |
1051 | vnic_intr_return_credits(&enic->intr[ENIC_INTX_WQ_RQ], | |
1052 | work_done, | |
1053 | 0 /* don't unmask intr */, | |
1054 | 0 /* don't reset intr timer */); | |
1055 | ||
1056 | if (rq_work_done > 0) { | |
1057 | ||
1058 | /* Replenish RQ | |
1059 | */ | |
1060 | ||
1061 | vnic_rq_fill(&enic->rq[0], enic_rq_alloc_buf); | |
1062 | ||
1063 | } else { | |
1064 | ||
1065 | /* If no work done, flush all LROs and exit polling | |
1066 | */ | |
1067 | ||
86ca9db7 | 1068 | if (netdev->features & NETIF_F_LRO) |
01f2e4ea SF |
1069 | lro_flush_all(&enic->lro_mgr); |
1070 | ||
288379f0 | 1071 | napi_complete(napi); |
01f2e4ea SF |
1072 | vnic_intr_unmask(&enic->intr[ENIC_MSIX_RQ]); |
1073 | } | |
1074 | ||
1075 | return rq_work_done; | |
1076 | } | |
1077 | ||
1078 | static int enic_poll_msix(struct napi_struct *napi, int budget) | |
1079 | { | |
1080 | struct enic *enic = container_of(napi, struct enic, napi); | |
1081 | struct net_device *netdev = enic->netdev; | |
1082 | unsigned int work_to_do = budget; | |
1083 | unsigned int work_done; | |
1084 | ||
1085 | /* Service RQ | |
1086 | */ | |
1087 | ||
1088 | work_done = vnic_cq_service(&enic->cq[ENIC_CQ_RQ], | |
1089 | work_to_do, enic_rq_service, NULL); | |
1090 | ||
1091 | if (work_done > 0) { | |
1092 | ||
1093 | /* Replenish RQ | |
1094 | */ | |
1095 | ||
1096 | vnic_rq_fill(&enic->rq[0], enic_rq_alloc_buf); | |
1097 | ||
1098 | /* Accumulate intr event credits for this polling | |
1099 | * cycle. An intr event is the completion of a | |
1100 | * a WQ or RQ packet. | |
1101 | */ | |
1102 | ||
1103 | vnic_intr_return_credits(&enic->intr[ENIC_MSIX_RQ], | |
1104 | work_done, | |
1105 | 0 /* don't unmask intr */, | |
1106 | 0 /* don't reset intr timer */); | |
1107 | } else { | |
1108 | ||
1109 | /* If no work done, flush all LROs and exit polling | |
1110 | */ | |
1111 | ||
86ca9db7 | 1112 | if (netdev->features & NETIF_F_LRO) |
01f2e4ea SF |
1113 | lro_flush_all(&enic->lro_mgr); |
1114 | ||
288379f0 | 1115 | napi_complete(napi); |
01f2e4ea SF |
1116 | vnic_intr_unmask(&enic->intr[ENIC_MSIX_RQ]); |
1117 | } | |
1118 | ||
1119 | return work_done; | |
1120 | } | |
1121 | ||
1122 | static void enic_notify_timer(unsigned long data) | |
1123 | { | |
1124 | struct enic *enic = (struct enic *)data; | |
1125 | ||
1126 | enic_notify_check(enic); | |
1127 | ||
25f0a061 SF |
1128 | mod_timer(&enic->notify_timer, |
1129 | round_jiffies(jiffies + ENIC_NOTIFY_TIMER_PERIOD)); | |
01f2e4ea SF |
1130 | } |
1131 | ||
1132 | static void enic_free_intr(struct enic *enic) | |
1133 | { | |
1134 | struct net_device *netdev = enic->netdev; | |
1135 | unsigned int i; | |
1136 | ||
1137 | switch (vnic_dev_get_intr_mode(enic->vdev)) { | |
1138 | case VNIC_DEV_INTR_MODE_INTX: | |
01f2e4ea SF |
1139 | free_irq(enic->pdev->irq, netdev); |
1140 | break; | |
8f4d248c SF |
1141 | case VNIC_DEV_INTR_MODE_MSI: |
1142 | free_irq(enic->pdev->irq, enic); | |
1143 | break; | |
01f2e4ea SF |
1144 | case VNIC_DEV_INTR_MODE_MSIX: |
1145 | for (i = 0; i < ARRAY_SIZE(enic->msix); i++) | |
1146 | if (enic->msix[i].requested) | |
1147 | free_irq(enic->msix_entry[i].vector, | |
1148 | enic->msix[i].devid); | |
1149 | break; | |
1150 | default: | |
1151 | break; | |
1152 | } | |
1153 | } | |
1154 | ||
1155 | static int enic_request_intr(struct enic *enic) | |
1156 | { | |
1157 | struct net_device *netdev = enic->netdev; | |
1158 | unsigned int i; | |
1159 | int err = 0; | |
1160 | ||
1161 | switch (vnic_dev_get_intr_mode(enic->vdev)) { | |
1162 | ||
1163 | case VNIC_DEV_INTR_MODE_INTX: | |
1164 | ||
1165 | err = request_irq(enic->pdev->irq, enic_isr_legacy, | |
1166 | IRQF_SHARED, netdev->name, netdev); | |
1167 | break; | |
1168 | ||
1169 | case VNIC_DEV_INTR_MODE_MSI: | |
1170 | ||
1171 | err = request_irq(enic->pdev->irq, enic_isr_msi, | |
1172 | 0, netdev->name, enic); | |
1173 | break; | |
1174 | ||
1175 | case VNIC_DEV_INTR_MODE_MSIX: | |
1176 | ||
1177 | sprintf(enic->msix[ENIC_MSIX_RQ].devname, | |
8f4d248c | 1178 | "%.11s-rx-0", netdev->name); |
01f2e4ea SF |
1179 | enic->msix[ENIC_MSIX_RQ].isr = enic_isr_msix_rq; |
1180 | enic->msix[ENIC_MSIX_RQ].devid = enic; | |
1181 | ||
1182 | sprintf(enic->msix[ENIC_MSIX_WQ].devname, | |
8f4d248c | 1183 | "%.11s-tx-0", netdev->name); |
01f2e4ea SF |
1184 | enic->msix[ENIC_MSIX_WQ].isr = enic_isr_msix_wq; |
1185 | enic->msix[ENIC_MSIX_WQ].devid = enic; | |
1186 | ||
1187 | sprintf(enic->msix[ENIC_MSIX_ERR].devname, | |
1188 | "%.11s-err", netdev->name); | |
1189 | enic->msix[ENIC_MSIX_ERR].isr = enic_isr_msix_err; | |
1190 | enic->msix[ENIC_MSIX_ERR].devid = enic; | |
1191 | ||
1192 | sprintf(enic->msix[ENIC_MSIX_NOTIFY].devname, | |
1193 | "%.11s-notify", netdev->name); | |
1194 | enic->msix[ENIC_MSIX_NOTIFY].isr = enic_isr_msix_notify; | |
1195 | enic->msix[ENIC_MSIX_NOTIFY].devid = enic; | |
1196 | ||
1197 | for (i = 0; i < ARRAY_SIZE(enic->msix); i++) { | |
1198 | err = request_irq(enic->msix_entry[i].vector, | |
1199 | enic->msix[i].isr, 0, | |
1200 | enic->msix[i].devname, | |
1201 | enic->msix[i].devid); | |
1202 | if (err) { | |
1203 | enic_free_intr(enic); | |
1204 | break; | |
1205 | } | |
1206 | enic->msix[i].requested = 1; | |
1207 | } | |
1208 | ||
1209 | break; | |
1210 | ||
1211 | default: | |
1212 | break; | |
1213 | } | |
1214 | ||
1215 | return err; | |
1216 | } | |
1217 | ||
1218 | static int enic_notify_set(struct enic *enic) | |
1219 | { | |
1220 | int err; | |
1221 | ||
1222 | switch (vnic_dev_get_intr_mode(enic->vdev)) { | |
1223 | case VNIC_DEV_INTR_MODE_INTX: | |
1224 | err = vnic_dev_notify_set(enic->vdev, ENIC_INTX_NOTIFY); | |
1225 | break; | |
1226 | case VNIC_DEV_INTR_MODE_MSIX: | |
1227 | err = vnic_dev_notify_set(enic->vdev, ENIC_MSIX_NOTIFY); | |
1228 | break; | |
1229 | default: | |
1230 | err = vnic_dev_notify_set(enic->vdev, -1 /* no intr */); | |
1231 | break; | |
1232 | } | |
1233 | ||
1234 | return err; | |
1235 | } | |
1236 | ||
1237 | static void enic_notify_timer_start(struct enic *enic) | |
1238 | { | |
1239 | switch (vnic_dev_get_intr_mode(enic->vdev)) { | |
1240 | case VNIC_DEV_INTR_MODE_MSI: | |
1241 | mod_timer(&enic->notify_timer, jiffies); | |
1242 | break; | |
1243 | default: | |
1244 | /* Using intr for notification for INTx/MSI-X */ | |
1245 | break; | |
1246 | }; | |
1247 | } | |
1248 | ||
1249 | /* rtnl lock is held, process context */ | |
1250 | static int enic_open(struct net_device *netdev) | |
1251 | { | |
1252 | struct enic *enic = netdev_priv(netdev); | |
1253 | unsigned int i; | |
1254 | int err; | |
1255 | ||
4b75a442 SF |
1256 | err = enic_request_intr(enic); |
1257 | if (err) { | |
1258 | printk(KERN_ERR PFX "%s: Unable to request irq.\n", | |
1259 | netdev->name); | |
1260 | return err; | |
1261 | } | |
1262 | ||
1263 | err = enic_notify_set(enic); | |
1264 | if (err) { | |
1265 | printk(KERN_ERR PFX | |
1266 | "%s: Failed to alloc notify buffer, aborting.\n", | |
1267 | netdev->name); | |
1268 | goto err_out_free_intr; | |
1269 | } | |
1270 | ||
01f2e4ea SF |
1271 | for (i = 0; i < enic->rq_count; i++) { |
1272 | err = vnic_rq_fill(&enic->rq[i], enic_rq_alloc_buf); | |
1273 | if (err) { | |
1274 | printk(KERN_ERR PFX | |
1275 | "%s: Unable to alloc receive buffers.\n", | |
1276 | netdev->name); | |
4b75a442 | 1277 | goto err_out_notify_unset; |
01f2e4ea SF |
1278 | } |
1279 | } | |
1280 | ||
1281 | for (i = 0; i < enic->wq_count; i++) | |
1282 | vnic_wq_enable(&enic->wq[i]); | |
1283 | for (i = 0; i < enic->rq_count; i++) | |
1284 | vnic_rq_enable(&enic->rq[i]); | |
1285 | ||
1286 | enic_add_station_addr(enic); | |
1287 | enic_set_multicast_list(netdev); | |
1288 | ||
1289 | netif_wake_queue(netdev); | |
1290 | napi_enable(&enic->napi); | |
1291 | vnic_dev_enable(enic->vdev); | |
1292 | ||
1293 | for (i = 0; i < enic->intr_count; i++) | |
1294 | vnic_intr_unmask(&enic->intr[i]); | |
1295 | ||
1296 | enic_notify_timer_start(enic); | |
1297 | ||
1298 | return 0; | |
4b75a442 SF |
1299 | |
1300 | err_out_notify_unset: | |
1301 | vnic_dev_notify_unset(enic->vdev); | |
1302 | err_out_free_intr: | |
1303 | enic_free_intr(enic); | |
1304 | ||
1305 | return err; | |
01f2e4ea SF |
1306 | } |
1307 | ||
1308 | /* rtnl lock is held, process context */ | |
1309 | static int enic_stop(struct net_device *netdev) | |
1310 | { | |
1311 | struct enic *enic = netdev_priv(netdev); | |
1312 | unsigned int i; | |
1313 | int err; | |
1314 | ||
1315 | del_timer_sync(&enic->notify_timer); | |
1316 | ||
1317 | vnic_dev_disable(enic->vdev); | |
1318 | napi_disable(&enic->napi); | |
1319 | netif_stop_queue(netdev); | |
1320 | ||
1321 | for (i = 0; i < enic->intr_count; i++) | |
1322 | vnic_intr_mask(&enic->intr[i]); | |
1323 | ||
1324 | for (i = 0; i < enic->wq_count; i++) { | |
1325 | err = vnic_wq_disable(&enic->wq[i]); | |
1326 | if (err) | |
1327 | return err; | |
1328 | } | |
1329 | for (i = 0; i < enic->rq_count; i++) { | |
1330 | err = vnic_rq_disable(&enic->rq[i]); | |
1331 | if (err) | |
1332 | return err; | |
1333 | } | |
1334 | ||
4b75a442 SF |
1335 | vnic_dev_notify_unset(enic->vdev); |
1336 | enic_free_intr(enic); | |
1337 | ||
01f2e4ea SF |
1338 | (void)vnic_cq_service(&enic->cq[ENIC_CQ_RQ], |
1339 | -1, enic_rq_service_drop, NULL); | |
1340 | (void)vnic_cq_service(&enic->cq[ENIC_CQ_WQ], | |
1341 | -1, enic_wq_service, NULL); | |
1342 | ||
1343 | for (i = 0; i < enic->wq_count; i++) | |
1344 | vnic_wq_clean(&enic->wq[i], enic_free_wq_buf); | |
1345 | for (i = 0; i < enic->rq_count; i++) | |
1346 | vnic_rq_clean(&enic->rq[i], enic_free_rq_buf); | |
1347 | for (i = 0; i < enic->cq_count; i++) | |
1348 | vnic_cq_clean(&enic->cq[i]); | |
1349 | for (i = 0; i < enic->intr_count; i++) | |
1350 | vnic_intr_clean(&enic->intr[i]); | |
1351 | ||
1352 | return 0; | |
1353 | } | |
1354 | ||
1355 | static int enic_change_mtu(struct net_device *netdev, int new_mtu) | |
1356 | { | |
1357 | struct enic *enic = netdev_priv(netdev); | |
1358 | int running = netif_running(netdev); | |
1359 | ||
25f0a061 SF |
1360 | if (new_mtu < ENIC_MIN_MTU || new_mtu > ENIC_MAX_MTU) |
1361 | return -EINVAL; | |
1362 | ||
01f2e4ea SF |
1363 | if (running) |
1364 | enic_stop(netdev); | |
1365 | ||
01f2e4ea SF |
1366 | netdev->mtu = new_mtu; |
1367 | ||
1368 | if (netdev->mtu > enic->port_mtu) | |
1369 | printk(KERN_WARNING PFX | |
1370 | "%s: interface MTU (%d) set higher " | |
1371 | "than port MTU (%d)\n", | |
1372 | netdev->name, netdev->mtu, enic->port_mtu); | |
1373 | ||
1374 | if (running) | |
1375 | enic_open(netdev); | |
1376 | ||
1377 | return 0; | |
1378 | } | |
1379 | ||
1380 | #ifdef CONFIG_NET_POLL_CONTROLLER | |
1381 | static void enic_poll_controller(struct net_device *netdev) | |
1382 | { | |
1383 | struct enic *enic = netdev_priv(netdev); | |
1384 | struct vnic_dev *vdev = enic->vdev; | |
1385 | ||
1386 | switch (vnic_dev_get_intr_mode(vdev)) { | |
1387 | case VNIC_DEV_INTR_MODE_MSIX: | |
1388 | enic_isr_msix_rq(enic->pdev->irq, enic); | |
1389 | enic_isr_msix_wq(enic->pdev->irq, enic); | |
1390 | break; | |
1391 | case VNIC_DEV_INTR_MODE_MSI: | |
1392 | enic_isr_msi(enic->pdev->irq, enic); | |
1393 | break; | |
1394 | case VNIC_DEV_INTR_MODE_INTX: | |
1395 | enic_isr_legacy(enic->pdev->irq, netdev); | |
1396 | break; | |
1397 | default: | |
1398 | break; | |
1399 | } | |
1400 | } | |
1401 | #endif | |
1402 | ||
1403 | static int enic_dev_wait(struct vnic_dev *vdev, | |
1404 | int (*start)(struct vnic_dev *, int), | |
1405 | int (*finished)(struct vnic_dev *, int *), | |
1406 | int arg) | |
1407 | { | |
1408 | unsigned long time; | |
1409 | int done; | |
1410 | int err; | |
1411 | ||
1412 | BUG_ON(in_interrupt()); | |
1413 | ||
1414 | err = start(vdev, arg); | |
1415 | if (err) | |
1416 | return err; | |
1417 | ||
1418 | /* Wait for func to complete...2 seconds max | |
1419 | */ | |
1420 | ||
1421 | time = jiffies + (HZ * 2); | |
1422 | do { | |
1423 | ||
1424 | err = finished(vdev, &done); | |
1425 | if (err) | |
1426 | return err; | |
1427 | ||
1428 | if (done) | |
1429 | return 0; | |
1430 | ||
1431 | schedule_timeout_uninterruptible(HZ / 10); | |
1432 | ||
1433 | } while (time_after(time, jiffies)); | |
1434 | ||
1435 | return -ETIMEDOUT; | |
1436 | } | |
1437 | ||
1438 | static int enic_dev_open(struct enic *enic) | |
1439 | { | |
1440 | int err; | |
1441 | ||
1442 | err = enic_dev_wait(enic->vdev, vnic_dev_open, | |
1443 | vnic_dev_open_done, 0); | |
1444 | if (err) | |
1445 | printk(KERN_ERR PFX | |
1446 | "vNIC device open failed, err %d.\n", err); | |
1447 | ||
1448 | return err; | |
1449 | } | |
1450 | ||
1451 | static int enic_dev_soft_reset(struct enic *enic) | |
1452 | { | |
1453 | int err; | |
1454 | ||
1455 | err = enic_dev_wait(enic->vdev, vnic_dev_soft_reset, | |
1456 | vnic_dev_soft_reset_done, 0); | |
1457 | if (err) | |
1458 | printk(KERN_ERR PFX | |
1459 | "vNIC soft reset failed, err %d.\n", err); | |
1460 | ||
1461 | return err; | |
1462 | } | |
1463 | ||
1464 | static void enic_reset(struct work_struct *work) | |
1465 | { | |
1466 | struct enic *enic = container_of(work, struct enic, reset); | |
1467 | ||
1468 | if (!netif_running(enic->netdev)) | |
1469 | return; | |
1470 | ||
1471 | rtnl_lock(); | |
1472 | ||
1473 | spin_lock(&enic->devcmd_lock); | |
1474 | vnic_dev_hang_notify(enic->vdev); | |
1475 | spin_unlock(&enic->devcmd_lock); | |
1476 | ||
1477 | enic_stop(enic->netdev); | |
1478 | enic_dev_soft_reset(enic); | |
1479 | enic_reset_mcaddrs(enic); | |
1480 | enic_init_vnic_resources(enic); | |
1481 | enic_open(enic->netdev); | |
1482 | ||
1483 | rtnl_unlock(); | |
1484 | } | |
1485 | ||
1486 | static int enic_set_intr_mode(struct enic *enic) | |
1487 | { | |
1488 | unsigned int n = ARRAY_SIZE(enic->rq); | |
1489 | unsigned int m = ARRAY_SIZE(enic->wq); | |
1490 | unsigned int i; | |
1491 | ||
1492 | /* Set interrupt mode (INTx, MSI, MSI-X) depending | |
1493 | * system capabilities. | |
1494 | * | |
1495 | * Try MSI-X first | |
1496 | * | |
1497 | * We need n RQs, m WQs, n+m CQs, and n+m+2 INTRs | |
1498 | * (the second to last INTR is used for WQ/RQ errors) | |
1499 | * (the last INTR is used for notifications) | |
1500 | */ | |
1501 | ||
1502 | BUG_ON(ARRAY_SIZE(enic->msix_entry) < n + m + 2); | |
1503 | for (i = 0; i < n + m + 2; i++) | |
1504 | enic->msix_entry[i].entry = i; | |
1505 | ||
1506 | if (enic->config.intr_mode < 1 && | |
1507 | enic->rq_count >= n && | |
1508 | enic->wq_count >= m && | |
1509 | enic->cq_count >= n + m && | |
1510 | enic->intr_count >= n + m + 2 && | |
1511 | !pci_enable_msix(enic->pdev, enic->msix_entry, n + m + 2)) { | |
1512 | ||
1513 | enic->rq_count = n; | |
1514 | enic->wq_count = m; | |
1515 | enic->cq_count = n + m; | |
1516 | enic->intr_count = n + m + 2; | |
1517 | ||
1518 | vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_MSIX); | |
1519 | ||
1520 | return 0; | |
1521 | } | |
1522 | ||
1523 | /* Next try MSI | |
1524 | * | |
1525 | * We need 1 RQ, 1 WQ, 2 CQs, and 1 INTR | |
1526 | */ | |
1527 | ||
1528 | if (enic->config.intr_mode < 2 && | |
1529 | enic->rq_count >= 1 && | |
1530 | enic->wq_count >= 1 && | |
1531 | enic->cq_count >= 2 && | |
1532 | enic->intr_count >= 1 && | |
1533 | !pci_enable_msi(enic->pdev)) { | |
1534 | ||
1535 | enic->rq_count = 1; | |
1536 | enic->wq_count = 1; | |
1537 | enic->cq_count = 2; | |
1538 | enic->intr_count = 1; | |
1539 | ||
1540 | vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_MSI); | |
1541 | ||
1542 | return 0; | |
1543 | } | |
1544 | ||
1545 | /* Next try INTx | |
1546 | * | |
1547 | * We need 1 RQ, 1 WQ, 2 CQs, and 3 INTRs | |
1548 | * (the first INTR is used for WQ/RQ) | |
1549 | * (the second INTR is used for WQ/RQ errors) | |
1550 | * (the last INTR is used for notifications) | |
1551 | */ | |
1552 | ||
1553 | if (enic->config.intr_mode < 3 && | |
1554 | enic->rq_count >= 1 && | |
1555 | enic->wq_count >= 1 && | |
1556 | enic->cq_count >= 2 && | |
1557 | enic->intr_count >= 3) { | |
1558 | ||
1559 | enic->rq_count = 1; | |
1560 | enic->wq_count = 1; | |
1561 | enic->cq_count = 2; | |
1562 | enic->intr_count = 3; | |
1563 | ||
1564 | vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_INTX); | |
1565 | ||
1566 | return 0; | |
1567 | } | |
1568 | ||
1569 | vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_UNKNOWN); | |
1570 | ||
1571 | return -EINVAL; | |
1572 | } | |
1573 | ||
1574 | static void enic_clear_intr_mode(struct enic *enic) | |
1575 | { | |
1576 | switch (vnic_dev_get_intr_mode(enic->vdev)) { | |
1577 | case VNIC_DEV_INTR_MODE_MSIX: | |
1578 | pci_disable_msix(enic->pdev); | |
1579 | break; | |
1580 | case VNIC_DEV_INTR_MODE_MSI: | |
1581 | pci_disable_msi(enic->pdev); | |
1582 | break; | |
1583 | default: | |
1584 | break; | |
1585 | } | |
1586 | ||
1587 | vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_UNKNOWN); | |
1588 | } | |
1589 | ||
1590 | static void enic_iounmap(struct enic *enic) | |
1591 | { | |
1592 | if (enic->bar0.vaddr) | |
1593 | iounmap(enic->bar0.vaddr); | |
1594 | } | |
1595 | ||
afe29f7a SH |
1596 | static const struct net_device_ops enic_netdev_ops = { |
1597 | .ndo_open = enic_open, | |
1598 | .ndo_stop = enic_stop, | |
00829823 | 1599 | .ndo_start_xmit = enic_hard_start_xmit, |
afe29f7a SH |
1600 | .ndo_get_stats = enic_get_stats, |
1601 | .ndo_validate_addr = eth_validate_addr, | |
fe96aaa1 | 1602 | .ndo_set_mac_address = eth_mac_addr, |
afe29f7a SH |
1603 | .ndo_set_multicast_list = enic_set_multicast_list, |
1604 | .ndo_change_mtu = enic_change_mtu, | |
1605 | .ndo_vlan_rx_register = enic_vlan_rx_register, | |
1606 | .ndo_vlan_rx_add_vid = enic_vlan_rx_add_vid, | |
1607 | .ndo_vlan_rx_kill_vid = enic_vlan_rx_kill_vid, | |
1608 | .ndo_tx_timeout = enic_tx_timeout, | |
1609 | #ifdef CONFIG_NET_POLL_CONTROLLER | |
1610 | .ndo_poll_controller = enic_poll_controller, | |
1611 | #endif | |
1612 | }; | |
1613 | ||
01f2e4ea SF |
1614 | static int __devinit enic_probe(struct pci_dev *pdev, |
1615 | const struct pci_device_id *ent) | |
1616 | { | |
1617 | struct net_device *netdev; | |
1618 | struct enic *enic; | |
1619 | int using_dac = 0; | |
1620 | unsigned int i; | |
1621 | int err; | |
1622 | ||
1623 | const u8 rss_default_cpu = 0; | |
1624 | const u8 rss_hash_type = 0; | |
1625 | const u8 rss_hash_bits = 0; | |
1626 | const u8 rss_base_cpu = 0; | |
1627 | const u8 rss_enable = 0; | |
1628 | const u8 tso_ipid_split_en = 0; | |
1629 | const u8 ig_vlan_strip_en = 1; | |
1630 | ||
1631 | /* Allocate net device structure and initialize. Private | |
1632 | * instance data is initialized to zero. | |
1633 | */ | |
1634 | ||
1635 | netdev = alloc_etherdev(sizeof(struct enic)); | |
1636 | if (!netdev) { | |
1637 | printk(KERN_ERR PFX "Etherdev alloc failed, aborting.\n"); | |
1638 | return -ENOMEM; | |
1639 | } | |
1640 | ||
01f2e4ea SF |
1641 | pci_set_drvdata(pdev, netdev); |
1642 | ||
1643 | SET_NETDEV_DEV(netdev, &pdev->dev); | |
1644 | ||
1645 | enic = netdev_priv(netdev); | |
1646 | enic->netdev = netdev; | |
1647 | enic->pdev = pdev; | |
1648 | ||
1649 | /* Setup PCI resources | |
1650 | */ | |
1651 | ||
1652 | err = pci_enable_device(pdev); | |
1653 | if (err) { | |
1654 | printk(KERN_ERR PFX | |
4b75a442 | 1655 | "Cannot enable PCI device, aborting.\n"); |
01f2e4ea SF |
1656 | goto err_out_free_netdev; |
1657 | } | |
1658 | ||
1659 | err = pci_request_regions(pdev, DRV_NAME); | |
1660 | if (err) { | |
1661 | printk(KERN_ERR PFX | |
4b75a442 | 1662 | "Cannot request PCI regions, aborting.\n"); |
01f2e4ea SF |
1663 | goto err_out_disable_device; |
1664 | } | |
1665 | ||
1666 | pci_set_master(pdev); | |
1667 | ||
1668 | /* Query PCI controller on system for DMA addressing | |
1669 | * limitation for the device. Try 40-bit first, and | |
1670 | * fail to 32-bit. | |
1671 | */ | |
1672 | ||
1673 | err = pci_set_dma_mask(pdev, DMA_40BIT_MASK); | |
1674 | if (err) { | |
1675 | err = pci_set_dma_mask(pdev, DMA_32BIT_MASK); | |
1676 | if (err) { | |
1677 | printk(KERN_ERR PFX | |
4b75a442 | 1678 | "No usable DMA configuration, aborting.\n"); |
01f2e4ea SF |
1679 | goto err_out_release_regions; |
1680 | } | |
1681 | err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK); | |
1682 | if (err) { | |
1683 | printk(KERN_ERR PFX | |
4b75a442 SF |
1684 | "Unable to obtain 32-bit DMA " |
1685 | "for consistent allocations, aborting.\n"); | |
01f2e4ea SF |
1686 | goto err_out_release_regions; |
1687 | } | |
1688 | } else { | |
1689 | err = pci_set_consistent_dma_mask(pdev, DMA_40BIT_MASK); | |
1690 | if (err) { | |
1691 | printk(KERN_ERR PFX | |
4b75a442 SF |
1692 | "Unable to obtain 40-bit DMA " |
1693 | "for consistent allocations, aborting.\n"); | |
01f2e4ea SF |
1694 | goto err_out_release_regions; |
1695 | } | |
1696 | using_dac = 1; | |
1697 | } | |
1698 | ||
1699 | /* Map vNIC resources from BAR0 | |
1700 | */ | |
1701 | ||
1702 | if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM)) { | |
1703 | printk(KERN_ERR PFX | |
4b75a442 | 1704 | "BAR0 not memory-map'able, aborting.\n"); |
01f2e4ea SF |
1705 | err = -ENODEV; |
1706 | goto err_out_release_regions; | |
1707 | } | |
1708 | ||
1709 | enic->bar0.vaddr = pci_iomap(pdev, 0, enic->bar0.len); | |
1710 | enic->bar0.bus_addr = pci_resource_start(pdev, 0); | |
1711 | enic->bar0.len = pci_resource_len(pdev, 0); | |
1712 | ||
1713 | if (!enic->bar0.vaddr) { | |
1714 | printk(KERN_ERR PFX | |
4b75a442 | 1715 | "Cannot memory-map BAR0 res hdr, aborting.\n"); |
01f2e4ea SF |
1716 | err = -ENODEV; |
1717 | goto err_out_release_regions; | |
1718 | } | |
1719 | ||
1720 | /* Register vNIC device | |
1721 | */ | |
1722 | ||
1723 | enic->vdev = vnic_dev_register(NULL, enic, pdev, &enic->bar0); | |
1724 | if (!enic->vdev) { | |
1725 | printk(KERN_ERR PFX | |
4b75a442 | 1726 | "vNIC registration failed, aborting.\n"); |
01f2e4ea SF |
1727 | err = -ENODEV; |
1728 | goto err_out_iounmap; | |
1729 | } | |
1730 | ||
1731 | /* Issue device open to get device in known state | |
1732 | */ | |
1733 | ||
1734 | err = enic_dev_open(enic); | |
1735 | if (err) { | |
1736 | printk(KERN_ERR PFX | |
4b75a442 | 1737 | "vNIC dev open failed, aborting.\n"); |
01f2e4ea SF |
1738 | goto err_out_vnic_unregister; |
1739 | } | |
1740 | ||
1741 | /* Issue device init to initialize the vnic-to-switch link. | |
1742 | * We'll start with carrier off and wait for link UP | |
1743 | * notification later to turn on carrier. We don't need | |
1744 | * to wait here for the vnic-to-switch link initialization | |
1745 | * to complete; link UP notification is the indication that | |
1746 | * the process is complete. | |
1747 | */ | |
1748 | ||
1749 | netif_carrier_off(netdev); | |
1750 | ||
1751 | err = vnic_dev_init(enic->vdev, 0); | |
1752 | if (err) { | |
1753 | printk(KERN_ERR PFX | |
4b75a442 | 1754 | "vNIC dev init failed, aborting.\n"); |
01f2e4ea SF |
1755 | goto err_out_dev_close; |
1756 | } | |
1757 | ||
1758 | /* Get vNIC configuration | |
1759 | */ | |
1760 | ||
1761 | err = enic_get_vnic_config(enic); | |
1762 | if (err) { | |
1763 | printk(KERN_ERR PFX | |
4b75a442 | 1764 | "Get vNIC configuration failed, aborting.\n"); |
01f2e4ea SF |
1765 | goto err_out_dev_close; |
1766 | } | |
1767 | ||
1768 | /* Get available resource counts | |
86ca9db7 | 1769 | */ |
01f2e4ea SF |
1770 | |
1771 | enic_get_res_counts(enic); | |
1772 | ||
1773 | /* Set interrupt mode based on resource counts and system | |
1774 | * capabilities | |
86ca9db7 | 1775 | */ |
01f2e4ea SF |
1776 | |
1777 | err = enic_set_intr_mode(enic); | |
1778 | if (err) { | |
1779 | printk(KERN_ERR PFX | |
4b75a442 | 1780 | "Failed to set intr mode, aborting.\n"); |
01f2e4ea SF |
1781 | goto err_out_dev_close; |
1782 | } | |
1783 | ||
1784 | /* Allocate and configure vNIC resources | |
1785 | */ | |
1786 | ||
1787 | err = enic_alloc_vnic_resources(enic); | |
1788 | if (err) { | |
1789 | printk(KERN_ERR PFX | |
4b75a442 | 1790 | "Failed to alloc vNIC resources, aborting.\n"); |
01f2e4ea SF |
1791 | goto err_out_free_vnic_resources; |
1792 | } | |
1793 | ||
1794 | enic_init_vnic_resources(enic); | |
1795 | ||
1796 | /* Enable VLAN tag stripping. RSS not enabled (yet). | |
1797 | */ | |
1798 | ||
1799 | err = enic_set_nic_cfg(enic, | |
1800 | rss_default_cpu, rss_hash_type, | |
1801 | rss_hash_bits, rss_base_cpu, | |
1802 | rss_enable, tso_ipid_split_en, | |
1803 | ig_vlan_strip_en); | |
1804 | if (err) { | |
1805 | printk(KERN_ERR PFX | |
4b75a442 | 1806 | "Failed to config nic, aborting.\n"); |
01f2e4ea SF |
1807 | goto err_out_free_vnic_resources; |
1808 | } | |
1809 | ||
1810 | /* Setup notification timer, HW reset task, and locks | |
1811 | */ | |
1812 | ||
1813 | init_timer(&enic->notify_timer); | |
1814 | enic->notify_timer.function = enic_notify_timer; | |
1815 | enic->notify_timer.data = (unsigned long)enic; | |
1816 | ||
1817 | INIT_WORK(&enic->reset, enic_reset); | |
1818 | ||
1819 | for (i = 0; i < enic->wq_count; i++) | |
1820 | spin_lock_init(&enic->wq_lock[i]); | |
1821 | ||
1822 | spin_lock_init(&enic->devcmd_lock); | |
1823 | ||
1824 | /* Register net device | |
1825 | */ | |
1826 | ||
1827 | enic->port_mtu = enic->config.mtu; | |
1828 | (void)enic_change_mtu(netdev, enic->port_mtu); | |
1829 | ||
1830 | err = enic_set_mac_addr(netdev, enic->mac_addr); | |
1831 | if (err) { | |
1832 | printk(KERN_ERR PFX | |
4b75a442 SF |
1833 | "Invalid MAC address, aborting.\n"); |
1834 | goto err_out_free_vnic_resources; | |
01f2e4ea SF |
1835 | } |
1836 | ||
afe29f7a | 1837 | netdev->netdev_ops = &enic_netdev_ops; |
01f2e4ea SF |
1838 | netdev->watchdog_timeo = 2 * HZ; |
1839 | netdev->ethtool_ops = &enic_ethtool_ops; | |
01f2e4ea SF |
1840 | |
1841 | switch (vnic_dev_get_intr_mode(enic->vdev)) { | |
1842 | default: | |
1843 | netif_napi_add(netdev, &enic->napi, enic_poll, 64); | |
1844 | break; | |
1845 | case VNIC_DEV_INTR_MODE_MSIX: | |
1846 | netif_napi_add(netdev, &enic->napi, enic_poll_msix, 64); | |
1847 | break; | |
1848 | } | |
1849 | ||
1850 | netdev->features |= NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX; | |
1851 | if (ENIC_SETTING(enic, TXCSUM)) | |
1852 | netdev->features |= NETIF_F_SG | NETIF_F_HW_CSUM; | |
1853 | if (ENIC_SETTING(enic, TSO)) | |
1854 | netdev->features |= NETIF_F_TSO | | |
1855 | NETIF_F_TSO6 | NETIF_F_TSO_ECN; | |
86ca9db7 SF |
1856 | if (ENIC_SETTING(enic, LRO)) |
1857 | netdev->features |= NETIF_F_LRO; | |
01f2e4ea SF |
1858 | if (using_dac) |
1859 | netdev->features |= NETIF_F_HIGHDMA; | |
1860 | ||
1861 | ||
1862 | enic->csum_rx_enabled = ENIC_SETTING(enic, RXCSUM); | |
1863 | ||
86ca9db7 SF |
1864 | enic->lro_mgr.max_aggr = ENIC_LRO_MAX_AGGR; |
1865 | enic->lro_mgr.max_desc = ENIC_LRO_MAX_DESC; | |
1866 | enic->lro_mgr.lro_arr = enic->lro_desc; | |
1867 | enic->lro_mgr.get_skb_header = enic_get_skb_header; | |
1868 | enic->lro_mgr.features = LRO_F_NAPI | LRO_F_EXTRACT_VLAN_ID; | |
1869 | enic->lro_mgr.dev = netdev; | |
1870 | enic->lro_mgr.ip_summed = CHECKSUM_COMPLETE; | |
1871 | enic->lro_mgr.ip_summed_aggr = CHECKSUM_UNNECESSARY; | |
1872 | ||
01f2e4ea SF |
1873 | |
1874 | err = register_netdev(netdev); | |
1875 | if (err) { | |
1876 | printk(KERN_ERR PFX | |
4b75a442 SF |
1877 | "Cannot register net device, aborting.\n"); |
1878 | goto err_out_free_vnic_resources; | |
01f2e4ea SF |
1879 | } |
1880 | ||
1881 | return 0; | |
1882 | ||
01f2e4ea SF |
1883 | err_out_free_vnic_resources: |
1884 | enic_free_vnic_resources(enic); | |
01f2e4ea SF |
1885 | err_out_dev_close: |
1886 | vnic_dev_close(enic->vdev); | |
1887 | err_out_vnic_unregister: | |
1888 | enic_clear_intr_mode(enic); | |
1889 | vnic_dev_unregister(enic->vdev); | |
1890 | err_out_iounmap: | |
1891 | enic_iounmap(enic); | |
1892 | err_out_release_regions: | |
1893 | pci_release_regions(pdev); | |
1894 | err_out_disable_device: | |
1895 | pci_disable_device(pdev); | |
1896 | err_out_free_netdev: | |
1897 | pci_set_drvdata(pdev, NULL); | |
1898 | free_netdev(netdev); | |
1899 | ||
1900 | return err; | |
1901 | } | |
1902 | ||
1903 | static void __devexit enic_remove(struct pci_dev *pdev) | |
1904 | { | |
1905 | struct net_device *netdev = pci_get_drvdata(pdev); | |
1906 | ||
1907 | if (netdev) { | |
1908 | struct enic *enic = netdev_priv(netdev); | |
1909 | ||
1910 | flush_scheduled_work(); | |
1911 | unregister_netdev(netdev); | |
01f2e4ea | 1912 | enic_free_vnic_resources(enic); |
01f2e4ea SF |
1913 | vnic_dev_close(enic->vdev); |
1914 | enic_clear_intr_mode(enic); | |
1915 | vnic_dev_unregister(enic->vdev); | |
1916 | enic_iounmap(enic); | |
1917 | pci_release_regions(pdev); | |
1918 | pci_disable_device(pdev); | |
1919 | pci_set_drvdata(pdev, NULL); | |
1920 | free_netdev(netdev); | |
1921 | } | |
1922 | } | |
1923 | ||
1924 | static struct pci_driver enic_driver = { | |
1925 | .name = DRV_NAME, | |
1926 | .id_table = enic_id_table, | |
1927 | .probe = enic_probe, | |
1928 | .remove = __devexit_p(enic_remove), | |
1929 | }; | |
1930 | ||
1931 | static int __init enic_init_module(void) | |
1932 | { | |
1933 | printk(KERN_INFO PFX "%s, ver %s\n", DRV_DESCRIPTION, DRV_VERSION); | |
1934 | ||
1935 | return pci_register_driver(&enic_driver); | |
1936 | } | |
1937 | ||
1938 | static void __exit enic_cleanup_module(void) | |
1939 | { | |
1940 | pci_unregister_driver(&enic_driver); | |
1941 | } | |
1942 | ||
1943 | module_init(enic_init_module); | |
1944 | module_exit(enic_cleanup_module); |