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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> | |
f8bd9091 | 32 | #include <linux/if_link.h> |
01f2e4ea SF |
33 | #include <linux/ethtool.h> |
34 | #include <linux/in.h> | |
35 | #include <linux/ip.h> | |
36 | #include <linux/ipv6.h> | |
37 | #include <linux/tcp.h> | |
b7c6bfb7 | 38 | #include <net/ip6_checksum.h> |
01f2e4ea SF |
39 | |
40 | #include "cq_enet_desc.h" | |
41 | #include "vnic_dev.h" | |
42 | #include "vnic_intr.h" | |
43 | #include "vnic_stats.h" | |
f8bd9091 | 44 | #include "vnic_vic.h" |
01f2e4ea SF |
45 | #include "enic_res.h" |
46 | #include "enic.h" | |
47 | ||
48 | #define ENIC_NOTIFY_TIMER_PERIOD (2 * HZ) | |
ea0d7d91 SF |
49 | #define WQ_ENET_MAX_DESC_LEN (1 << WQ_ENET_LEN_BITS) |
50 | #define MAX_TSO (1 << 16) | |
51 | #define ENIC_DESC_MAX_SPLITS (MAX_TSO / WQ_ENET_MAX_DESC_LEN + 1) | |
52 | ||
53 | #define PCI_DEVICE_ID_CISCO_VIC_ENET 0x0043 /* ethernet vnic */ | |
f8bd9091 | 54 | #define PCI_DEVICE_ID_CISCO_VIC_ENET_DYN 0x0044 /* enet dynamic vnic */ |
01f2e4ea SF |
55 | |
56 | /* Supported devices */ | |
a3aa1884 | 57 | static DEFINE_PCI_DEVICE_TABLE(enic_id_table) = { |
ea0d7d91 | 58 | { PCI_VDEVICE(CISCO, PCI_DEVICE_ID_CISCO_VIC_ENET) }, |
f8bd9091 | 59 | { PCI_VDEVICE(CISCO, PCI_DEVICE_ID_CISCO_VIC_ENET_DYN) }, |
01f2e4ea SF |
60 | { 0, } /* end of table */ |
61 | }; | |
62 | ||
63 | MODULE_DESCRIPTION(DRV_DESCRIPTION); | |
64 | MODULE_AUTHOR("Scott Feldman <scofeldm@cisco.com>"); | |
65 | MODULE_LICENSE("GPL"); | |
66 | MODULE_VERSION(DRV_VERSION); | |
67 | MODULE_DEVICE_TABLE(pci, enic_id_table); | |
68 | ||
69 | struct enic_stat { | |
70 | char name[ETH_GSTRING_LEN]; | |
71 | unsigned int offset; | |
72 | }; | |
73 | ||
74 | #define ENIC_TX_STAT(stat) \ | |
75 | { .name = #stat, .offset = offsetof(struct vnic_tx_stats, stat) / 8 } | |
76 | #define ENIC_RX_STAT(stat) \ | |
77 | { .name = #stat, .offset = offsetof(struct vnic_rx_stats, stat) / 8 } | |
78 | ||
79 | static const struct enic_stat enic_tx_stats[] = { | |
80 | ENIC_TX_STAT(tx_frames_ok), | |
81 | ENIC_TX_STAT(tx_unicast_frames_ok), | |
82 | ENIC_TX_STAT(tx_multicast_frames_ok), | |
83 | ENIC_TX_STAT(tx_broadcast_frames_ok), | |
84 | ENIC_TX_STAT(tx_bytes_ok), | |
85 | ENIC_TX_STAT(tx_unicast_bytes_ok), | |
86 | ENIC_TX_STAT(tx_multicast_bytes_ok), | |
87 | ENIC_TX_STAT(tx_broadcast_bytes_ok), | |
88 | ENIC_TX_STAT(tx_drops), | |
89 | ENIC_TX_STAT(tx_errors), | |
90 | ENIC_TX_STAT(tx_tso), | |
91 | }; | |
92 | ||
93 | static const struct enic_stat enic_rx_stats[] = { | |
94 | ENIC_RX_STAT(rx_frames_ok), | |
95 | ENIC_RX_STAT(rx_frames_total), | |
96 | ENIC_RX_STAT(rx_unicast_frames_ok), | |
97 | ENIC_RX_STAT(rx_multicast_frames_ok), | |
98 | ENIC_RX_STAT(rx_broadcast_frames_ok), | |
99 | ENIC_RX_STAT(rx_bytes_ok), | |
100 | ENIC_RX_STAT(rx_unicast_bytes_ok), | |
101 | ENIC_RX_STAT(rx_multicast_bytes_ok), | |
102 | ENIC_RX_STAT(rx_broadcast_bytes_ok), | |
103 | ENIC_RX_STAT(rx_drop), | |
104 | ENIC_RX_STAT(rx_no_bufs), | |
105 | ENIC_RX_STAT(rx_errors), | |
106 | ENIC_RX_STAT(rx_rss), | |
107 | ENIC_RX_STAT(rx_crc_errors), | |
108 | ENIC_RX_STAT(rx_frames_64), | |
109 | ENIC_RX_STAT(rx_frames_127), | |
110 | ENIC_RX_STAT(rx_frames_255), | |
111 | ENIC_RX_STAT(rx_frames_511), | |
112 | ENIC_RX_STAT(rx_frames_1023), | |
113 | ENIC_RX_STAT(rx_frames_1518), | |
114 | ENIC_RX_STAT(rx_frames_to_max), | |
115 | }; | |
116 | ||
117 | static const unsigned int enic_n_tx_stats = ARRAY_SIZE(enic_tx_stats); | |
118 | static const unsigned int enic_n_rx_stats = ARRAY_SIZE(enic_rx_stats); | |
119 | ||
f8bd9091 SF |
120 | static int enic_is_dynamic(struct enic *enic) |
121 | { | |
122 | return enic->pdev->device == PCI_DEVICE_ID_CISCO_VIC_ENET_DYN; | |
123 | } | |
124 | ||
01f2e4ea SF |
125 | static int enic_get_settings(struct net_device *netdev, |
126 | struct ethtool_cmd *ecmd) | |
127 | { | |
128 | struct enic *enic = netdev_priv(netdev); | |
129 | ||
130 | ecmd->supported = (SUPPORTED_10000baseT_Full | SUPPORTED_FIBRE); | |
131 | ecmd->advertising = (ADVERTISED_10000baseT_Full | ADVERTISED_FIBRE); | |
132 | ecmd->port = PORT_FIBRE; | |
133 | ecmd->transceiver = XCVR_EXTERNAL; | |
134 | ||
135 | if (netif_carrier_ok(netdev)) { | |
136 | ecmd->speed = vnic_dev_port_speed(enic->vdev); | |
137 | ecmd->duplex = DUPLEX_FULL; | |
138 | } else { | |
139 | ecmd->speed = -1; | |
140 | ecmd->duplex = -1; | |
141 | } | |
142 | ||
143 | ecmd->autoneg = AUTONEG_DISABLE; | |
144 | ||
145 | return 0; | |
146 | } | |
147 | ||
148 | static void enic_get_drvinfo(struct net_device *netdev, | |
149 | struct ethtool_drvinfo *drvinfo) | |
150 | { | |
151 | struct enic *enic = netdev_priv(netdev); | |
152 | struct vnic_devcmd_fw_info *fw_info; | |
153 | ||
154 | spin_lock(&enic->devcmd_lock); | |
155 | vnic_dev_fw_info(enic->vdev, &fw_info); | |
156 | spin_unlock(&enic->devcmd_lock); | |
157 | ||
158 | strncpy(drvinfo->driver, DRV_NAME, sizeof(drvinfo->driver)); | |
159 | strncpy(drvinfo->version, DRV_VERSION, sizeof(drvinfo->version)); | |
160 | strncpy(drvinfo->fw_version, fw_info->fw_version, | |
161 | sizeof(drvinfo->fw_version)); | |
162 | strncpy(drvinfo->bus_info, pci_name(enic->pdev), | |
163 | sizeof(drvinfo->bus_info)); | |
164 | } | |
165 | ||
166 | static void enic_get_strings(struct net_device *netdev, u32 stringset, u8 *data) | |
167 | { | |
168 | unsigned int i; | |
169 | ||
170 | switch (stringset) { | |
171 | case ETH_SS_STATS: | |
172 | for (i = 0; i < enic_n_tx_stats; i++) { | |
173 | memcpy(data, enic_tx_stats[i].name, ETH_GSTRING_LEN); | |
174 | data += ETH_GSTRING_LEN; | |
175 | } | |
176 | for (i = 0; i < enic_n_rx_stats; i++) { | |
177 | memcpy(data, enic_rx_stats[i].name, ETH_GSTRING_LEN); | |
178 | data += ETH_GSTRING_LEN; | |
179 | } | |
180 | break; | |
181 | } | |
182 | } | |
183 | ||
25f0a061 | 184 | static int enic_get_sset_count(struct net_device *netdev, int sset) |
01f2e4ea | 185 | { |
25f0a061 SF |
186 | switch (sset) { |
187 | case ETH_SS_STATS: | |
188 | return enic_n_tx_stats + enic_n_rx_stats; | |
189 | default: | |
190 | return -EOPNOTSUPP; | |
191 | } | |
01f2e4ea SF |
192 | } |
193 | ||
194 | static void enic_get_ethtool_stats(struct net_device *netdev, | |
195 | struct ethtool_stats *stats, u64 *data) | |
196 | { | |
197 | struct enic *enic = netdev_priv(netdev); | |
198 | struct vnic_stats *vstats; | |
199 | unsigned int i; | |
200 | ||
201 | spin_lock(&enic->devcmd_lock); | |
202 | vnic_dev_stats_dump(enic->vdev, &vstats); | |
203 | spin_unlock(&enic->devcmd_lock); | |
204 | ||
205 | for (i = 0; i < enic_n_tx_stats; i++) | |
206 | *(data++) = ((u64 *)&vstats->tx)[enic_tx_stats[i].offset]; | |
207 | for (i = 0; i < enic_n_rx_stats; i++) | |
208 | *(data++) = ((u64 *)&vstats->rx)[enic_rx_stats[i].offset]; | |
209 | } | |
210 | ||
211 | static u32 enic_get_rx_csum(struct net_device *netdev) | |
212 | { | |
213 | struct enic *enic = netdev_priv(netdev); | |
214 | return enic->csum_rx_enabled; | |
215 | } | |
216 | ||
217 | static int enic_set_rx_csum(struct net_device *netdev, u32 data) | |
218 | { | |
219 | struct enic *enic = netdev_priv(netdev); | |
220 | ||
25f0a061 SF |
221 | if (data && !ENIC_SETTING(enic, RXCSUM)) |
222 | return -EINVAL; | |
223 | ||
224 | enic->csum_rx_enabled = !!data; | |
01f2e4ea SF |
225 | |
226 | return 0; | |
227 | } | |
228 | ||
229 | static int enic_set_tx_csum(struct net_device *netdev, u32 data) | |
230 | { | |
231 | struct enic *enic = netdev_priv(netdev); | |
232 | ||
25f0a061 SF |
233 | if (data && !ENIC_SETTING(enic, TXCSUM)) |
234 | return -EINVAL; | |
235 | ||
236 | if (data) | |
01f2e4ea SF |
237 | netdev->features |= NETIF_F_HW_CSUM; |
238 | else | |
239 | netdev->features &= ~NETIF_F_HW_CSUM; | |
240 | ||
241 | return 0; | |
242 | } | |
243 | ||
244 | static int enic_set_tso(struct net_device *netdev, u32 data) | |
245 | { | |
246 | struct enic *enic = netdev_priv(netdev); | |
247 | ||
25f0a061 SF |
248 | if (data && !ENIC_SETTING(enic, TSO)) |
249 | return -EINVAL; | |
250 | ||
251 | if (data) | |
01f2e4ea SF |
252 | netdev->features |= |
253 | NETIF_F_TSO | NETIF_F_TSO6 | NETIF_F_TSO_ECN; | |
254 | else | |
255 | netdev->features &= | |
256 | ~(NETIF_F_TSO | NETIF_F_TSO6 | NETIF_F_TSO_ECN); | |
257 | ||
258 | return 0; | |
259 | } | |
260 | ||
261 | static u32 enic_get_msglevel(struct net_device *netdev) | |
262 | { | |
263 | struct enic *enic = netdev_priv(netdev); | |
264 | return enic->msg_enable; | |
265 | } | |
266 | ||
267 | static void enic_set_msglevel(struct net_device *netdev, u32 value) | |
268 | { | |
269 | struct enic *enic = netdev_priv(netdev); | |
270 | enic->msg_enable = value; | |
271 | } | |
272 | ||
7c844599 SF |
273 | static int enic_get_coalesce(struct net_device *netdev, |
274 | struct ethtool_coalesce *ecmd) | |
275 | { | |
276 | struct enic *enic = netdev_priv(netdev); | |
277 | ||
278 | ecmd->tx_coalesce_usecs = enic->tx_coalesce_usecs; | |
279 | ecmd->rx_coalesce_usecs = enic->rx_coalesce_usecs; | |
280 | ||
281 | return 0; | |
282 | } | |
283 | ||
284 | static int enic_set_coalesce(struct net_device *netdev, | |
285 | struct ethtool_coalesce *ecmd) | |
286 | { | |
287 | struct enic *enic = netdev_priv(netdev); | |
288 | u32 tx_coalesce_usecs; | |
289 | u32 rx_coalesce_usecs; | |
290 | ||
291 | tx_coalesce_usecs = min_t(u32, | |
292 | INTR_COALESCE_HW_TO_USEC(VNIC_INTR_TIMER_MAX), | |
293 | ecmd->tx_coalesce_usecs); | |
294 | rx_coalesce_usecs = min_t(u32, | |
295 | INTR_COALESCE_HW_TO_USEC(VNIC_INTR_TIMER_MAX), | |
296 | ecmd->rx_coalesce_usecs); | |
297 | ||
298 | switch (vnic_dev_get_intr_mode(enic->vdev)) { | |
299 | case VNIC_DEV_INTR_MODE_INTX: | |
300 | if (tx_coalesce_usecs != rx_coalesce_usecs) | |
301 | return -EINVAL; | |
302 | ||
303 | vnic_intr_coalescing_timer_set(&enic->intr[ENIC_INTX_WQ_RQ], | |
304 | INTR_COALESCE_USEC_TO_HW(tx_coalesce_usecs)); | |
305 | break; | |
306 | case VNIC_DEV_INTR_MODE_MSI: | |
307 | if (tx_coalesce_usecs != rx_coalesce_usecs) | |
308 | return -EINVAL; | |
309 | ||
310 | vnic_intr_coalescing_timer_set(&enic->intr[0], | |
311 | INTR_COALESCE_USEC_TO_HW(tx_coalesce_usecs)); | |
312 | break; | |
313 | case VNIC_DEV_INTR_MODE_MSIX: | |
314 | vnic_intr_coalescing_timer_set(&enic->intr[ENIC_MSIX_WQ], | |
315 | INTR_COALESCE_USEC_TO_HW(tx_coalesce_usecs)); | |
316 | vnic_intr_coalescing_timer_set(&enic->intr[ENIC_MSIX_RQ], | |
317 | INTR_COALESCE_USEC_TO_HW(rx_coalesce_usecs)); | |
318 | break; | |
319 | default: | |
320 | break; | |
321 | } | |
322 | ||
323 | enic->tx_coalesce_usecs = tx_coalesce_usecs; | |
324 | enic->rx_coalesce_usecs = rx_coalesce_usecs; | |
325 | ||
326 | return 0; | |
327 | } | |
328 | ||
0fc0b732 | 329 | static const struct ethtool_ops enic_ethtool_ops = { |
01f2e4ea SF |
330 | .get_settings = enic_get_settings, |
331 | .get_drvinfo = enic_get_drvinfo, | |
332 | .get_msglevel = enic_get_msglevel, | |
333 | .set_msglevel = enic_set_msglevel, | |
334 | .get_link = ethtool_op_get_link, | |
335 | .get_strings = enic_get_strings, | |
25f0a061 | 336 | .get_sset_count = enic_get_sset_count, |
01f2e4ea SF |
337 | .get_ethtool_stats = enic_get_ethtool_stats, |
338 | .get_rx_csum = enic_get_rx_csum, | |
339 | .set_rx_csum = enic_set_rx_csum, | |
340 | .get_tx_csum = ethtool_op_get_tx_csum, | |
341 | .set_tx_csum = enic_set_tx_csum, | |
342 | .get_sg = ethtool_op_get_sg, | |
343 | .set_sg = ethtool_op_set_sg, | |
344 | .get_tso = ethtool_op_get_tso, | |
345 | .set_tso = enic_set_tso, | |
7c844599 SF |
346 | .get_coalesce = enic_get_coalesce, |
347 | .set_coalesce = enic_set_coalesce, | |
86ca9db7 SF |
348 | .get_flags = ethtool_op_get_flags, |
349 | .set_flags = ethtool_op_set_flags, | |
01f2e4ea SF |
350 | }; |
351 | ||
352 | static void enic_free_wq_buf(struct vnic_wq *wq, struct vnic_wq_buf *buf) | |
353 | { | |
354 | struct enic *enic = vnic_dev_priv(wq->vdev); | |
355 | ||
356 | if (buf->sop) | |
357 | pci_unmap_single(enic->pdev, buf->dma_addr, | |
358 | buf->len, PCI_DMA_TODEVICE); | |
359 | else | |
360 | pci_unmap_page(enic->pdev, buf->dma_addr, | |
361 | buf->len, PCI_DMA_TODEVICE); | |
362 | ||
363 | if (buf->os_buf) | |
364 | dev_kfree_skb_any(buf->os_buf); | |
365 | } | |
366 | ||
367 | static void enic_wq_free_buf(struct vnic_wq *wq, | |
368 | struct cq_desc *cq_desc, struct vnic_wq_buf *buf, void *opaque) | |
369 | { | |
370 | enic_free_wq_buf(wq, buf); | |
371 | } | |
372 | ||
373 | static int enic_wq_service(struct vnic_dev *vdev, struct cq_desc *cq_desc, | |
374 | u8 type, u16 q_number, u16 completed_index, void *opaque) | |
375 | { | |
376 | struct enic *enic = vnic_dev_priv(vdev); | |
377 | ||
378 | spin_lock(&enic->wq_lock[q_number]); | |
379 | ||
380 | vnic_wq_service(&enic->wq[q_number], cq_desc, | |
381 | completed_index, enic_wq_free_buf, | |
382 | opaque); | |
383 | ||
384 | if (netif_queue_stopped(enic->netdev) && | |
ea0d7d91 SF |
385 | vnic_wq_desc_avail(&enic->wq[q_number]) >= |
386 | (MAX_SKB_FRAGS + ENIC_DESC_MAX_SPLITS)) | |
01f2e4ea SF |
387 | netif_wake_queue(enic->netdev); |
388 | ||
389 | spin_unlock(&enic->wq_lock[q_number]); | |
390 | ||
391 | return 0; | |
392 | } | |
393 | ||
394 | static void enic_log_q_error(struct enic *enic) | |
395 | { | |
396 | unsigned int i; | |
397 | u32 error_status; | |
398 | ||
399 | for (i = 0; i < enic->wq_count; i++) { | |
400 | error_status = vnic_wq_error_status(&enic->wq[i]); | |
401 | if (error_status) | |
402 | printk(KERN_ERR PFX "%s: WQ[%d] error_status %d\n", | |
403 | enic->netdev->name, i, error_status); | |
404 | } | |
405 | ||
406 | for (i = 0; i < enic->rq_count; i++) { | |
407 | error_status = vnic_rq_error_status(&enic->rq[i]); | |
408 | if (error_status) | |
409 | printk(KERN_ERR PFX "%s: RQ[%d] error_status %d\n", | |
410 | enic->netdev->name, i, error_status); | |
411 | } | |
412 | } | |
413 | ||
414 | static void enic_link_check(struct enic *enic) | |
415 | { | |
416 | int link_status = vnic_dev_link_status(enic->vdev); | |
417 | int carrier_ok = netif_carrier_ok(enic->netdev); | |
418 | ||
419 | if (link_status && !carrier_ok) { | |
420 | printk(KERN_INFO PFX "%s: Link UP\n", enic->netdev->name); | |
421 | netif_carrier_on(enic->netdev); | |
422 | } else if (!link_status && carrier_ok) { | |
423 | printk(KERN_INFO PFX "%s: Link DOWN\n", enic->netdev->name); | |
424 | netif_carrier_off(enic->netdev); | |
425 | } | |
426 | } | |
427 | ||
428 | static void enic_mtu_check(struct enic *enic) | |
429 | { | |
430 | u32 mtu = vnic_dev_mtu(enic->vdev); | |
431 | ||
491598a4 | 432 | if (mtu && mtu != enic->port_mtu) { |
7c844599 | 433 | enic->port_mtu = mtu; |
01f2e4ea SF |
434 | if (mtu < enic->netdev->mtu) |
435 | printk(KERN_WARNING PFX | |
436 | "%s: interface MTU (%d) set higher " | |
437 | "than switch port MTU (%d)\n", | |
438 | enic->netdev->name, enic->netdev->mtu, mtu); | |
01f2e4ea SF |
439 | } |
440 | } | |
441 | ||
442 | static void enic_msglvl_check(struct enic *enic) | |
443 | { | |
444 | u32 msg_enable = vnic_dev_msg_lvl(enic->vdev); | |
445 | ||
446 | if (msg_enable != enic->msg_enable) { | |
447 | printk(KERN_INFO PFX "%s: msg lvl changed from 0x%x to 0x%x\n", | |
448 | enic->netdev->name, enic->msg_enable, msg_enable); | |
449 | enic->msg_enable = msg_enable; | |
450 | } | |
451 | } | |
452 | ||
453 | static void enic_notify_check(struct enic *enic) | |
454 | { | |
455 | enic_msglvl_check(enic); | |
456 | enic_mtu_check(enic); | |
457 | enic_link_check(enic); | |
458 | } | |
459 | ||
460 | #define ENIC_TEST_INTR(pba, i) (pba & (1 << i)) | |
461 | ||
462 | static irqreturn_t enic_isr_legacy(int irq, void *data) | |
463 | { | |
464 | struct net_device *netdev = data; | |
465 | struct enic *enic = netdev_priv(netdev); | |
466 | u32 pba; | |
467 | ||
468 | vnic_intr_mask(&enic->intr[ENIC_INTX_WQ_RQ]); | |
469 | ||
470 | pba = vnic_intr_legacy_pba(enic->legacy_pba); | |
471 | if (!pba) { | |
472 | vnic_intr_unmask(&enic->intr[ENIC_INTX_WQ_RQ]); | |
473 | return IRQ_NONE; /* not our interrupt */ | |
474 | } | |
475 | ||
ed8af6b2 SF |
476 | if (ENIC_TEST_INTR(pba, ENIC_INTX_NOTIFY)) { |
477 | vnic_intr_return_all_credits(&enic->intr[ENIC_INTX_NOTIFY]); | |
01f2e4ea | 478 | enic_notify_check(enic); |
ed8af6b2 | 479 | } |
01f2e4ea SF |
480 | |
481 | if (ENIC_TEST_INTR(pba, ENIC_INTX_ERR)) { | |
ed8af6b2 | 482 | vnic_intr_return_all_credits(&enic->intr[ENIC_INTX_ERR]); |
01f2e4ea SF |
483 | enic_log_q_error(enic); |
484 | /* schedule recovery from WQ/RQ error */ | |
485 | schedule_work(&enic->reset); | |
486 | return IRQ_HANDLED; | |
487 | } | |
488 | ||
489 | if (ENIC_TEST_INTR(pba, ENIC_INTX_WQ_RQ)) { | |
288379f0 BH |
490 | if (napi_schedule_prep(&enic->napi)) |
491 | __napi_schedule(&enic->napi); | |
01f2e4ea SF |
492 | } else { |
493 | vnic_intr_unmask(&enic->intr[ENIC_INTX_WQ_RQ]); | |
494 | } | |
495 | ||
496 | return IRQ_HANDLED; | |
497 | } | |
498 | ||
499 | static irqreturn_t enic_isr_msi(int irq, void *data) | |
500 | { | |
501 | struct enic *enic = data; | |
502 | ||
503 | /* With MSI, there is no sharing of interrupts, so this is | |
504 | * our interrupt and there is no need to ack it. The device | |
505 | * is not providing per-vector masking, so the OS will not | |
506 | * write to PCI config space to mask/unmask the interrupt. | |
507 | * We're using mask_on_assertion for MSI, so the device | |
508 | * automatically masks the interrupt when the interrupt is | |
509 | * generated. Later, when exiting polling, the interrupt | |
510 | * will be unmasked (see enic_poll). | |
511 | * | |
512 | * Also, the device uses the same PCIe Traffic Class (TC) | |
513 | * for Memory Write data and MSI, so there are no ordering | |
514 | * issues; the MSI will always arrive at the Root Complex | |
515 | * _after_ corresponding Memory Writes (i.e. descriptor | |
516 | * writes). | |
517 | */ | |
518 | ||
288379f0 | 519 | napi_schedule(&enic->napi); |
01f2e4ea SF |
520 | |
521 | return IRQ_HANDLED; | |
522 | } | |
523 | ||
524 | static irqreturn_t enic_isr_msix_rq(int irq, void *data) | |
525 | { | |
526 | struct enic *enic = data; | |
527 | ||
528 | /* schedule NAPI polling for RQ cleanup */ | |
288379f0 | 529 | napi_schedule(&enic->napi); |
01f2e4ea SF |
530 | |
531 | return IRQ_HANDLED; | |
532 | } | |
533 | ||
534 | static irqreturn_t enic_isr_msix_wq(int irq, void *data) | |
535 | { | |
536 | struct enic *enic = data; | |
537 | unsigned int wq_work_to_do = -1; /* no limit */ | |
538 | unsigned int wq_work_done; | |
539 | ||
540 | wq_work_done = vnic_cq_service(&enic->cq[ENIC_CQ_WQ], | |
541 | wq_work_to_do, enic_wq_service, NULL); | |
542 | ||
543 | vnic_intr_return_credits(&enic->intr[ENIC_MSIX_WQ], | |
544 | wq_work_done, | |
545 | 1 /* unmask intr */, | |
546 | 1 /* reset intr timer */); | |
547 | ||
548 | return IRQ_HANDLED; | |
549 | } | |
550 | ||
551 | static irqreturn_t enic_isr_msix_err(int irq, void *data) | |
552 | { | |
553 | struct enic *enic = data; | |
554 | ||
ed8af6b2 SF |
555 | vnic_intr_return_all_credits(&enic->intr[ENIC_MSIX_ERR]); |
556 | ||
01f2e4ea SF |
557 | enic_log_q_error(enic); |
558 | ||
559 | /* schedule recovery from WQ/RQ error */ | |
560 | schedule_work(&enic->reset); | |
561 | ||
562 | return IRQ_HANDLED; | |
563 | } | |
564 | ||
565 | static irqreturn_t enic_isr_msix_notify(int irq, void *data) | |
566 | { | |
567 | struct enic *enic = data; | |
568 | ||
ed8af6b2 | 569 | vnic_intr_return_all_credits(&enic->intr[ENIC_MSIX_NOTIFY]); |
01f2e4ea | 570 | enic_notify_check(enic); |
01f2e4ea SF |
571 | |
572 | return IRQ_HANDLED; | |
573 | } | |
574 | ||
575 | static inline void enic_queue_wq_skb_cont(struct enic *enic, | |
576 | struct vnic_wq *wq, struct sk_buff *skb, | |
577 | unsigned int len_left) | |
578 | { | |
579 | skb_frag_t *frag; | |
580 | ||
581 | /* Queue additional data fragments */ | |
582 | for (frag = skb_shinfo(skb)->frags; len_left; frag++) { | |
583 | len_left -= frag->size; | |
584 | enic_queue_wq_desc_cont(wq, skb, | |
585 | pci_map_page(enic->pdev, frag->page, | |
586 | frag->page_offset, frag->size, | |
587 | PCI_DMA_TODEVICE), | |
588 | frag->size, | |
589 | (len_left == 0)); /* EOP? */ | |
590 | } | |
591 | } | |
592 | ||
593 | static inline void enic_queue_wq_skb_vlan(struct enic *enic, | |
594 | struct vnic_wq *wq, struct sk_buff *skb, | |
595 | int vlan_tag_insert, unsigned int vlan_tag) | |
596 | { | |
597 | unsigned int head_len = skb_headlen(skb); | |
598 | unsigned int len_left = skb->len - head_len; | |
599 | int eop = (len_left == 0); | |
600 | ||
ea0d7d91 SF |
601 | /* Queue the main skb fragment. The fragments are no larger |
602 | * than max MTU(9000)+ETH_HDR_LEN(14) bytes, which is less | |
603 | * than WQ_ENET_MAX_DESC_LEN length. So only one descriptor | |
604 | * per fragment is queued. | |
605 | */ | |
01f2e4ea SF |
606 | enic_queue_wq_desc(wq, skb, |
607 | pci_map_single(enic->pdev, skb->data, | |
608 | head_len, PCI_DMA_TODEVICE), | |
609 | head_len, | |
610 | vlan_tag_insert, vlan_tag, | |
611 | eop); | |
612 | ||
613 | if (!eop) | |
614 | enic_queue_wq_skb_cont(enic, wq, skb, len_left); | |
615 | } | |
616 | ||
617 | static inline void enic_queue_wq_skb_csum_l4(struct enic *enic, | |
618 | struct vnic_wq *wq, struct sk_buff *skb, | |
619 | int vlan_tag_insert, unsigned int vlan_tag) | |
620 | { | |
621 | unsigned int head_len = skb_headlen(skb); | |
622 | unsigned int len_left = skb->len - head_len; | |
623 | unsigned int hdr_len = skb_transport_offset(skb); | |
624 | unsigned int csum_offset = hdr_len + skb->csum_offset; | |
625 | int eop = (len_left == 0); | |
626 | ||
ea0d7d91 SF |
627 | /* Queue the main skb fragment. The fragments are no larger |
628 | * than max MTU(9000)+ETH_HDR_LEN(14) bytes, which is less | |
629 | * than WQ_ENET_MAX_DESC_LEN length. So only one descriptor | |
630 | * per fragment is queued. | |
631 | */ | |
01f2e4ea SF |
632 | enic_queue_wq_desc_csum_l4(wq, skb, |
633 | pci_map_single(enic->pdev, skb->data, | |
634 | head_len, PCI_DMA_TODEVICE), | |
635 | head_len, | |
636 | csum_offset, | |
637 | hdr_len, | |
638 | vlan_tag_insert, vlan_tag, | |
639 | eop); | |
640 | ||
641 | if (!eop) | |
642 | enic_queue_wq_skb_cont(enic, wq, skb, len_left); | |
643 | } | |
644 | ||
645 | static inline void enic_queue_wq_skb_tso(struct enic *enic, | |
646 | struct vnic_wq *wq, struct sk_buff *skb, unsigned int mss, | |
647 | int vlan_tag_insert, unsigned int vlan_tag) | |
648 | { | |
ea0d7d91 SF |
649 | unsigned int frag_len_left = skb_headlen(skb); |
650 | unsigned int len_left = skb->len - frag_len_left; | |
01f2e4ea SF |
651 | unsigned int hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb); |
652 | int eop = (len_left == 0); | |
ea0d7d91 SF |
653 | unsigned int len; |
654 | dma_addr_t dma_addr; | |
655 | unsigned int offset = 0; | |
656 | skb_frag_t *frag; | |
01f2e4ea SF |
657 | |
658 | /* Preload TCP csum field with IP pseudo hdr calculated | |
659 | * with IP length set to zero. HW will later add in length | |
660 | * to each TCP segment resulting from the TSO. | |
661 | */ | |
662 | ||
09640e63 | 663 | if (skb->protocol == cpu_to_be16(ETH_P_IP)) { |
01f2e4ea SF |
664 | ip_hdr(skb)->check = 0; |
665 | tcp_hdr(skb)->check = ~csum_tcpudp_magic(ip_hdr(skb)->saddr, | |
666 | ip_hdr(skb)->daddr, 0, IPPROTO_TCP, 0); | |
09640e63 | 667 | } else if (skb->protocol == cpu_to_be16(ETH_P_IPV6)) { |
01f2e4ea SF |
668 | tcp_hdr(skb)->check = ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr, |
669 | &ipv6_hdr(skb)->daddr, 0, IPPROTO_TCP, 0); | |
670 | } | |
671 | ||
ea0d7d91 SF |
672 | /* Queue WQ_ENET_MAX_DESC_LEN length descriptors |
673 | * for the main skb fragment | |
674 | */ | |
675 | while (frag_len_left) { | |
676 | len = min(frag_len_left, (unsigned int)WQ_ENET_MAX_DESC_LEN); | |
677 | dma_addr = pci_map_single(enic->pdev, skb->data + offset, | |
678 | len, PCI_DMA_TODEVICE); | |
679 | enic_queue_wq_desc_tso(wq, skb, | |
680 | dma_addr, | |
681 | len, | |
682 | mss, hdr_len, | |
683 | vlan_tag_insert, vlan_tag, | |
684 | eop && (len == frag_len_left)); | |
685 | frag_len_left -= len; | |
686 | offset += len; | |
687 | } | |
01f2e4ea | 688 | |
ea0d7d91 SF |
689 | if (eop) |
690 | return; | |
691 | ||
692 | /* Queue WQ_ENET_MAX_DESC_LEN length descriptors | |
693 | * for additional data fragments | |
694 | */ | |
695 | for (frag = skb_shinfo(skb)->frags; len_left; frag++) { | |
696 | len_left -= frag->size; | |
697 | frag_len_left = frag->size; | |
698 | offset = frag->page_offset; | |
699 | ||
700 | while (frag_len_left) { | |
701 | len = min(frag_len_left, | |
702 | (unsigned int)WQ_ENET_MAX_DESC_LEN); | |
703 | dma_addr = pci_map_page(enic->pdev, frag->page, | |
704 | offset, len, | |
705 | PCI_DMA_TODEVICE); | |
706 | enic_queue_wq_desc_cont(wq, skb, | |
707 | dma_addr, | |
708 | len, | |
709 | (len_left == 0) && | |
710 | (len == frag_len_left)); /* EOP? */ | |
711 | frag_len_left -= len; | |
712 | offset += len; | |
713 | } | |
714 | } | |
01f2e4ea SF |
715 | } |
716 | ||
717 | static inline void enic_queue_wq_skb(struct enic *enic, | |
718 | struct vnic_wq *wq, struct sk_buff *skb) | |
719 | { | |
720 | unsigned int mss = skb_shinfo(skb)->gso_size; | |
721 | unsigned int vlan_tag = 0; | |
722 | int vlan_tag_insert = 0; | |
723 | ||
724 | if (enic->vlan_group && vlan_tx_tag_present(skb)) { | |
725 | /* VLAN tag from trunking driver */ | |
726 | vlan_tag_insert = 1; | |
727 | vlan_tag = vlan_tx_tag_get(skb); | |
728 | } | |
729 | ||
730 | if (mss) | |
731 | enic_queue_wq_skb_tso(enic, wq, skb, mss, | |
732 | vlan_tag_insert, vlan_tag); | |
733 | else if (skb->ip_summed == CHECKSUM_PARTIAL) | |
734 | enic_queue_wq_skb_csum_l4(enic, wq, skb, | |
735 | vlan_tag_insert, vlan_tag); | |
736 | else | |
737 | enic_queue_wq_skb_vlan(enic, wq, skb, | |
738 | vlan_tag_insert, vlan_tag); | |
739 | } | |
740 | ||
ed8af6b2 | 741 | /* netif_tx_lock held, process context with BHs disabled, or BH */ |
61357325 | 742 | static netdev_tx_t enic_hard_start_xmit(struct sk_buff *skb, |
d87fd25d | 743 | struct net_device *netdev) |
01f2e4ea SF |
744 | { |
745 | struct enic *enic = netdev_priv(netdev); | |
746 | struct vnic_wq *wq = &enic->wq[0]; | |
747 | unsigned long flags; | |
748 | ||
749 | if (skb->len <= 0) { | |
750 | dev_kfree_skb(skb); | |
751 | return NETDEV_TX_OK; | |
752 | } | |
753 | ||
754 | /* Non-TSO sends must fit within ENIC_NON_TSO_MAX_DESC descs, | |
755 | * which is very likely. In the off chance it's going to take | |
756 | * more than * ENIC_NON_TSO_MAX_DESC, linearize the skb. | |
757 | */ | |
758 | ||
759 | if (skb_shinfo(skb)->gso_size == 0 && | |
760 | skb_shinfo(skb)->nr_frags + 1 > ENIC_NON_TSO_MAX_DESC && | |
761 | skb_linearize(skb)) { | |
762 | dev_kfree_skb(skb); | |
763 | return NETDEV_TX_OK; | |
764 | } | |
765 | ||
766 | spin_lock_irqsave(&enic->wq_lock[0], flags); | |
767 | ||
ea0d7d91 SF |
768 | if (vnic_wq_desc_avail(wq) < |
769 | skb_shinfo(skb)->nr_frags + ENIC_DESC_MAX_SPLITS) { | |
01f2e4ea SF |
770 | netif_stop_queue(netdev); |
771 | /* This is a hard error, log it */ | |
772 | printk(KERN_ERR PFX "%s: BUG! Tx ring full when " | |
773 | "queue awake!\n", netdev->name); | |
774 | spin_unlock_irqrestore(&enic->wq_lock[0], flags); | |
775 | return NETDEV_TX_BUSY; | |
776 | } | |
777 | ||
778 | enic_queue_wq_skb(enic, wq, skb); | |
779 | ||
ea0d7d91 | 780 | if (vnic_wq_desc_avail(wq) < MAX_SKB_FRAGS + ENIC_DESC_MAX_SPLITS) |
01f2e4ea SF |
781 | netif_stop_queue(netdev); |
782 | ||
01f2e4ea SF |
783 | spin_unlock_irqrestore(&enic->wq_lock[0], flags); |
784 | ||
785 | return NETDEV_TX_OK; | |
786 | } | |
787 | ||
788 | /* dev_base_lock rwlock held, nominally process context */ | |
789 | static struct net_device_stats *enic_get_stats(struct net_device *netdev) | |
790 | { | |
791 | struct enic *enic = netdev_priv(netdev); | |
25f0a061 | 792 | struct net_device_stats *net_stats = &netdev->stats; |
01f2e4ea SF |
793 | struct vnic_stats *stats; |
794 | ||
795 | spin_lock(&enic->devcmd_lock); | |
796 | vnic_dev_stats_dump(enic->vdev, &stats); | |
797 | spin_unlock(&enic->devcmd_lock); | |
798 | ||
25f0a061 SF |
799 | net_stats->tx_packets = stats->tx.tx_frames_ok; |
800 | net_stats->tx_bytes = stats->tx.tx_bytes_ok; | |
801 | net_stats->tx_errors = stats->tx.tx_errors; | |
802 | net_stats->tx_dropped = stats->tx.tx_drops; | |
01f2e4ea | 803 | |
25f0a061 SF |
804 | net_stats->rx_packets = stats->rx.rx_frames_ok; |
805 | net_stats->rx_bytes = stats->rx.rx_bytes_ok; | |
806 | net_stats->rx_errors = stats->rx.rx_errors; | |
807 | net_stats->multicast = stats->rx.rx_multicast_frames_ok; | |
350991e1 | 808 | net_stats->rx_over_errors = enic->rq_truncated_pkts; |
bd9fb1a4 | 809 | net_stats->rx_crc_errors = enic->rq_bad_fcs; |
350991e1 | 810 | net_stats->rx_dropped = stats->rx.rx_no_bufs + stats->rx.rx_drop; |
01f2e4ea | 811 | |
25f0a061 | 812 | return net_stats; |
01f2e4ea SF |
813 | } |
814 | ||
815 | static void enic_reset_mcaddrs(struct enic *enic) | |
816 | { | |
817 | enic->mc_count = 0; | |
818 | } | |
819 | ||
820 | static int enic_set_mac_addr(struct net_device *netdev, char *addr) | |
821 | { | |
f8bd9091 SF |
822 | struct enic *enic = netdev_priv(netdev); |
823 | ||
824 | if (enic_is_dynamic(enic)) { | |
825 | if (!is_valid_ether_addr(addr) && !is_zero_ether_addr(addr)) | |
826 | return -EADDRNOTAVAIL; | |
827 | } else { | |
828 | if (!is_valid_ether_addr(addr)) | |
829 | return -EADDRNOTAVAIL; | |
830 | } | |
01f2e4ea SF |
831 | |
832 | memcpy(netdev->dev_addr, addr, netdev->addr_len); | |
833 | ||
834 | return 0; | |
835 | } | |
836 | ||
f8bd9091 SF |
837 | static int enic_dev_add_station_addr(struct enic *enic) |
838 | { | |
839 | int err = 0; | |
840 | ||
841 | if (is_valid_ether_addr(enic->netdev->dev_addr)) { | |
842 | spin_lock(&enic->devcmd_lock); | |
843 | err = vnic_dev_add_addr(enic->vdev, enic->netdev->dev_addr); | |
844 | spin_unlock(&enic->devcmd_lock); | |
845 | } | |
846 | ||
847 | return err; | |
848 | } | |
849 | ||
850 | static int enic_dev_del_station_addr(struct enic *enic) | |
851 | { | |
852 | int err = 0; | |
853 | ||
854 | if (is_valid_ether_addr(enic->netdev->dev_addr)) { | |
855 | spin_lock(&enic->devcmd_lock); | |
856 | err = vnic_dev_del_addr(enic->vdev, enic->netdev->dev_addr); | |
857 | spin_unlock(&enic->devcmd_lock); | |
858 | } | |
859 | ||
860 | return err; | |
861 | } | |
862 | ||
863 | static int enic_set_mac_address_dynamic(struct net_device *netdev, void *p) | |
864 | { | |
865 | struct enic *enic = netdev_priv(netdev); | |
866 | struct sockaddr *saddr = p; | |
867 | char *addr = saddr->sa_data; | |
868 | int err; | |
869 | ||
870 | if (netif_running(enic->netdev)) { | |
871 | err = enic_dev_del_station_addr(enic); | |
872 | if (err) | |
873 | return err; | |
874 | } | |
875 | ||
876 | err = enic_set_mac_addr(netdev, addr); | |
877 | if (err) | |
878 | return err; | |
879 | ||
880 | if (netif_running(enic->netdev)) { | |
881 | err = enic_dev_add_station_addr(enic); | |
882 | if (err) | |
883 | return err; | |
884 | } | |
885 | ||
886 | return err; | |
887 | } | |
888 | ||
889 | static int enic_set_mac_address(struct net_device *netdev, void *p) | |
890 | { | |
891 | return -EOPNOTSUPP; | |
892 | } | |
893 | ||
01f2e4ea SF |
894 | /* netif_tx_lock held, BHs disabled */ |
895 | static void enic_set_multicast_list(struct net_device *netdev) | |
896 | { | |
897 | struct enic *enic = netdev_priv(netdev); | |
22bedad3 | 898 | struct netdev_hw_addr *ha; |
01f2e4ea SF |
899 | int directed = 1; |
900 | int multicast = (netdev->flags & IFF_MULTICAST) ? 1 : 0; | |
901 | int broadcast = (netdev->flags & IFF_BROADCAST) ? 1 : 0; | |
902 | int promisc = (netdev->flags & IFF_PROMISC) ? 1 : 0; | |
4cd24eaf | 903 | unsigned int mc_count = netdev_mc_count(netdev); |
01f2e4ea | 904 | int allmulti = (netdev->flags & IFF_ALLMULTI) || |
641cb85e | 905 | mc_count > ENIC_MULTICAST_PERFECT_FILTERS; |
9959a185 | 906 | unsigned int flags = netdev->flags | (allmulti ? IFF_ALLMULTI : 0); |
01f2e4ea | 907 | u8 mc_addr[ENIC_MULTICAST_PERFECT_FILTERS][ETH_ALEN]; |
01f2e4ea SF |
908 | unsigned int i, j; |
909 | ||
910 | if (mc_count > ENIC_MULTICAST_PERFECT_FILTERS) | |
911 | mc_count = ENIC_MULTICAST_PERFECT_FILTERS; | |
912 | ||
913 | spin_lock(&enic->devcmd_lock); | |
914 | ||
9959a185 SF |
915 | if (enic->flags != flags) { |
916 | enic->flags = flags; | |
917 | vnic_dev_packet_filter(enic->vdev, directed, | |
918 | multicast, broadcast, promisc, allmulti); | |
919 | } | |
01f2e4ea SF |
920 | |
921 | /* Is there an easier way? Trying to minimize to | |
922 | * calls to add/del multicast addrs. We keep the | |
923 | * addrs from the last call in enic->mc_addr and | |
924 | * look for changes to add/del. | |
925 | */ | |
926 | ||
48e2f183 | 927 | i = 0; |
22bedad3 | 928 | netdev_for_each_mc_addr(ha, netdev) { |
48e2f183 JP |
929 | if (i == mc_count) |
930 | break; | |
22bedad3 | 931 | memcpy(mc_addr[i++], ha->addr, ETH_ALEN); |
01f2e4ea SF |
932 | } |
933 | ||
934 | for (i = 0; i < enic->mc_count; i++) { | |
935 | for (j = 0; j < mc_count; j++) | |
936 | if (compare_ether_addr(enic->mc_addr[i], | |
937 | mc_addr[j]) == 0) | |
938 | break; | |
939 | if (j == mc_count) | |
940 | enic_del_multicast_addr(enic, enic->mc_addr[i]); | |
941 | } | |
942 | ||
943 | for (i = 0; i < mc_count; i++) { | |
944 | for (j = 0; j < enic->mc_count; j++) | |
945 | if (compare_ether_addr(mc_addr[i], | |
946 | enic->mc_addr[j]) == 0) | |
947 | break; | |
948 | if (j == enic->mc_count) | |
949 | enic_add_multicast_addr(enic, mc_addr[i]); | |
950 | } | |
951 | ||
952 | /* Save the list to compare against next time | |
953 | */ | |
954 | ||
955 | for (i = 0; i < mc_count; i++) | |
956 | memcpy(enic->mc_addr[i], mc_addr[i], ETH_ALEN); | |
957 | ||
958 | enic->mc_count = mc_count; | |
959 | ||
960 | spin_unlock(&enic->devcmd_lock); | |
961 | } | |
962 | ||
963 | /* rtnl lock is held */ | |
964 | static void enic_vlan_rx_register(struct net_device *netdev, | |
965 | struct vlan_group *vlan_group) | |
966 | { | |
967 | struct enic *enic = netdev_priv(netdev); | |
968 | enic->vlan_group = vlan_group; | |
969 | } | |
970 | ||
971 | /* rtnl lock is held */ | |
972 | static void enic_vlan_rx_add_vid(struct net_device *netdev, u16 vid) | |
973 | { | |
974 | struct enic *enic = netdev_priv(netdev); | |
975 | ||
976 | spin_lock(&enic->devcmd_lock); | |
977 | enic_add_vlan(enic, vid); | |
978 | spin_unlock(&enic->devcmd_lock); | |
979 | } | |
980 | ||
981 | /* rtnl lock is held */ | |
982 | static void enic_vlan_rx_kill_vid(struct net_device *netdev, u16 vid) | |
983 | { | |
984 | struct enic *enic = netdev_priv(netdev); | |
985 | ||
986 | spin_lock(&enic->devcmd_lock); | |
987 | enic_del_vlan(enic, vid); | |
988 | spin_unlock(&enic->devcmd_lock); | |
989 | } | |
990 | ||
991 | /* netif_tx_lock held, BHs disabled */ | |
992 | static void enic_tx_timeout(struct net_device *netdev) | |
993 | { | |
994 | struct enic *enic = netdev_priv(netdev); | |
995 | schedule_work(&enic->reset); | |
996 | } | |
997 | ||
f8bd9091 SF |
998 | static int enic_vnic_dev_deinit(struct enic *enic) |
999 | { | |
1000 | int err; | |
1001 | ||
1002 | spin_lock(&enic->devcmd_lock); | |
1003 | err = vnic_dev_deinit(enic->vdev); | |
1004 | spin_unlock(&enic->devcmd_lock); | |
1005 | ||
1006 | return err; | |
1007 | } | |
1008 | ||
1009 | static int enic_dev_init_prov(struct enic *enic, struct vic_provinfo *vp) | |
1010 | { | |
1011 | int err; | |
1012 | ||
1013 | spin_lock(&enic->devcmd_lock); | |
1014 | err = vnic_dev_init_prov(enic->vdev, | |
1015 | (u8 *)vp, vic_provinfo_size(vp)); | |
1016 | spin_unlock(&enic->devcmd_lock); | |
1017 | ||
1018 | return err; | |
1019 | } | |
1020 | ||
1021 | static int enic_dev_init_done(struct enic *enic, int *done, int *error) | |
1022 | { | |
1023 | int err; | |
1024 | ||
1025 | spin_lock(&enic->devcmd_lock); | |
1026 | err = vnic_dev_init_done(enic->vdev, done, error); | |
1027 | spin_unlock(&enic->devcmd_lock); | |
1028 | ||
1029 | return err; | |
1030 | } | |
1031 | ||
08f382eb | 1032 | static int enic_set_port_profile(struct enic *enic, u8 *mac) |
f8bd9091 SF |
1033 | { |
1034 | struct vic_provinfo *vp; | |
1035 | u8 oui[3] = VIC_PROVINFO_CISCO_OUI; | |
6fc7f573 | 1036 | u8 *uuid; |
f8bd9091 | 1037 | char uuid_str[38]; |
6fc7f573 SF |
1038 | static char *uuid_fmt = "%02X%02X%02X%02X-%02X%02X-%02X%02X-" |
1039 | "%02X%02X-%02X%02X%02X%02X%0X%02X"; | |
f8bd9091 SF |
1040 | int err; |
1041 | ||
08f382eb SF |
1042 | err = enic_vnic_dev_deinit(enic); |
1043 | if (err) | |
1044 | return err; | |
f8bd9091 | 1045 | |
08f382eb | 1046 | switch (enic->pp.request) { |
f8bd9091 | 1047 | |
08f382eb | 1048 | case PORT_REQUEST_ASSOCIATE: |
f8bd9091 | 1049 | |
08f382eb SF |
1050 | if (!(enic->pp.set & ENIC_SET_NAME) || !strlen(enic->pp.name)) |
1051 | return -EINVAL; | |
f8bd9091 | 1052 | |
08f382eb SF |
1053 | if (!is_valid_ether_addr(mac)) |
1054 | return -EADDRNOTAVAIL; | |
f8bd9091 | 1055 | |
08f382eb SF |
1056 | vp = vic_provinfo_alloc(GFP_KERNEL, oui, |
1057 | VIC_PROVINFO_LINUX_TYPE); | |
1058 | if (!vp) | |
1059 | return -ENOMEM; | |
f8bd9091 | 1060 | |
f8bd9091 | 1061 | vic_provinfo_add_tlv(vp, |
08f382eb SF |
1062 | VIC_LINUX_PROV_TLV_PORT_PROFILE_NAME_STR, |
1063 | strlen(enic->pp.name) + 1, enic->pp.name); | |
f8bd9091 | 1064 | |
08f382eb SF |
1065 | vic_provinfo_add_tlv(vp, |
1066 | VIC_LINUX_PROV_TLV_CLIENT_MAC_ADDR, | |
1067 | ETH_ALEN, mac); | |
1068 | ||
1069 | if (enic->pp.set & ENIC_SET_INSTANCE) { | |
1070 | uuid = enic->pp.instance_uuid; | |
1071 | sprintf(uuid_str, uuid_fmt, | |
1072 | uuid[0], uuid[1], uuid[2], uuid[3], | |
1073 | uuid[4], uuid[5], uuid[6], uuid[7], | |
1074 | uuid[8], uuid[9], uuid[10], uuid[11], | |
1075 | uuid[12], uuid[13], uuid[14], uuid[15]); | |
1076 | vic_provinfo_add_tlv(vp, | |
1077 | VIC_LINUX_PROV_TLV_CLIENT_UUID_STR, | |
1078 | sizeof(uuid_str), uuid_str); | |
1079 | } | |
f8bd9091 | 1080 | |
08f382eb SF |
1081 | if (enic->pp.set & ENIC_SET_HOST) { |
1082 | uuid = enic->pp.host_uuid; | |
1083 | sprintf(uuid_str, uuid_fmt, | |
1084 | uuid[0], uuid[1], uuid[2], uuid[3], | |
1085 | uuid[4], uuid[5], uuid[6], uuid[7], | |
1086 | uuid[8], uuid[9], uuid[10], uuid[11], | |
1087 | uuid[12], uuid[13], uuid[14], uuid[15]); | |
1088 | vic_provinfo_add_tlv(vp, | |
1089 | VIC_LINUX_PROV_TLV_HOST_UUID_STR, | |
1090 | sizeof(uuid_str), uuid_str); | |
1091 | } | |
f8bd9091 | 1092 | |
08f382eb SF |
1093 | err = enic_dev_init_prov(enic, vp); |
1094 | vic_provinfo_free(vp); | |
1095 | if (err) | |
1096 | return err; | |
1097 | break; | |
f8bd9091 | 1098 | |
08f382eb SF |
1099 | case PORT_REQUEST_DISASSOCIATE: |
1100 | break; | |
f8bd9091 | 1101 | |
08f382eb SF |
1102 | default: |
1103 | return -EINVAL; | |
1104 | } | |
f8bd9091 | 1105 | |
08f382eb SF |
1106 | enic->pp.set |= ENIC_SET_APPLIED; |
1107 | return 0; | |
f8bd9091 SF |
1108 | } |
1109 | ||
1110 | static int enic_set_vf_port(struct net_device *netdev, int vf, | |
1111 | struct nlattr *port[]) | |
1112 | { | |
1113 | struct enic *enic = netdev_priv(netdev); | |
08f382eb SF |
1114 | |
1115 | memset(&enic->pp, 0, sizeof(enic->pp)); | |
1116 | ||
1117 | if (port[IFLA_PORT_REQUEST]) { | |
1118 | enic->pp.set |= ENIC_SET_REQUEST; | |
1119 | enic->pp.request = nla_get_u8(port[IFLA_PORT_REQUEST]); | |
1120 | } | |
1121 | ||
1122 | if (port[IFLA_PORT_PROFILE]) { | |
1123 | enic->pp.set |= ENIC_SET_NAME; | |
1124 | memcpy(enic->pp.name, nla_data(port[IFLA_PORT_PROFILE]), | |
1125 | PORT_PROFILE_MAX); | |
1126 | } | |
1127 | ||
1128 | if (port[IFLA_PORT_INSTANCE_UUID]) { | |
1129 | enic->pp.set |= ENIC_SET_INSTANCE; | |
1130 | memcpy(enic->pp.instance_uuid, | |
1131 | nla_data(port[IFLA_PORT_INSTANCE_UUID]), PORT_UUID_MAX); | |
1132 | } | |
1133 | ||
1134 | if (port[IFLA_PORT_HOST_UUID]) { | |
1135 | enic->pp.set |= ENIC_SET_HOST; | |
1136 | memcpy(enic->pp.host_uuid, | |
1137 | nla_data(port[IFLA_PORT_HOST_UUID]), PORT_UUID_MAX); | |
1138 | } | |
f8bd9091 SF |
1139 | |
1140 | /* don't support VFs, yet */ | |
1141 | if (vf != PORT_SELF_VF) | |
1142 | return -EOPNOTSUPP; | |
1143 | ||
08f382eb SF |
1144 | if (!(enic->pp.set & ENIC_SET_REQUEST)) |
1145 | return -EOPNOTSUPP; | |
f8bd9091 | 1146 | |
08f382eb | 1147 | if (enic->pp.request == PORT_REQUEST_ASSOCIATE) { |
f8bd9091 | 1148 | |
418c437d SF |
1149 | /* If the interface mac addr hasn't been assigned, |
1150 | * assign a random mac addr before setting port- | |
1151 | * profile. | |
1152 | */ | |
1153 | ||
1154 | if (is_zero_ether_addr(netdev->dev_addr)) | |
1155 | random_ether_addr(netdev->dev_addr); | |
f8bd9091 SF |
1156 | } |
1157 | ||
08f382eb | 1158 | return enic_set_port_profile(enic, netdev->dev_addr); |
f8bd9091 SF |
1159 | } |
1160 | ||
1161 | static int enic_get_vf_port(struct net_device *netdev, int vf, | |
1162 | struct sk_buff *skb) | |
1163 | { | |
1164 | struct enic *enic = netdev_priv(netdev); | |
1165 | int err, error, done; | |
1166 | u16 response = PORT_PROFILE_RESPONSE_SUCCESS; | |
1167 | ||
08f382eb SF |
1168 | if (!(enic->pp.set & ENIC_SET_APPLIED)) |
1169 | return -ENODATA; | |
f8bd9091 SF |
1170 | |
1171 | err = enic_dev_init_done(enic, &done, &error); | |
f8bd9091 | 1172 | if (err) |
08f382eb | 1173 | error = err; |
f8bd9091 SF |
1174 | |
1175 | switch (error) { | |
1176 | case ERR_SUCCESS: | |
1177 | if (!done) | |
1178 | response = PORT_PROFILE_RESPONSE_INPROGRESS; | |
1179 | break; | |
1180 | case ERR_EINVAL: | |
1181 | response = PORT_PROFILE_RESPONSE_INVALID; | |
1182 | break; | |
1183 | case ERR_EBADSTATE: | |
1184 | response = PORT_PROFILE_RESPONSE_BADSTATE; | |
1185 | break; | |
1186 | case ERR_ENOMEM: | |
1187 | response = PORT_PROFILE_RESPONSE_INSUFFICIENT_RESOURCES; | |
1188 | break; | |
1189 | default: | |
1190 | response = PORT_PROFILE_RESPONSE_ERROR; | |
1191 | break; | |
1192 | } | |
1193 | ||
1194 | NLA_PUT_U16(skb, IFLA_PORT_REQUEST, enic->pp.request); | |
1195 | NLA_PUT_U16(skb, IFLA_PORT_RESPONSE, response); | |
08f382eb SF |
1196 | if (enic->pp.set & ENIC_SET_NAME) |
1197 | NLA_PUT(skb, IFLA_PORT_PROFILE, PORT_PROFILE_MAX, | |
1198 | enic->pp.name); | |
1199 | if (enic->pp.set & ENIC_SET_INSTANCE) | |
1200 | NLA_PUT(skb, IFLA_PORT_INSTANCE_UUID, PORT_UUID_MAX, | |
1201 | enic->pp.instance_uuid); | |
1202 | if (enic->pp.set & ENIC_SET_HOST) | |
1203 | NLA_PUT(skb, IFLA_PORT_HOST_UUID, PORT_UUID_MAX, | |
1204 | enic->pp.host_uuid); | |
f8bd9091 SF |
1205 | |
1206 | return 0; | |
1207 | ||
1208 | nla_put_failure: | |
1209 | return -EMSGSIZE; | |
1210 | } | |
1211 | ||
01f2e4ea SF |
1212 | static void enic_free_rq_buf(struct vnic_rq *rq, struct vnic_rq_buf *buf) |
1213 | { | |
1214 | struct enic *enic = vnic_dev_priv(rq->vdev); | |
1215 | ||
1216 | if (!buf->os_buf) | |
1217 | return; | |
1218 | ||
1219 | pci_unmap_single(enic->pdev, buf->dma_addr, | |
1220 | buf->len, PCI_DMA_FROMDEVICE); | |
1221 | dev_kfree_skb_any(buf->os_buf); | |
1222 | } | |
1223 | ||
01f2e4ea SF |
1224 | static int enic_rq_alloc_buf(struct vnic_rq *rq) |
1225 | { | |
1226 | struct enic *enic = vnic_dev_priv(rq->vdev); | |
d19e22dc | 1227 | struct net_device *netdev = enic->netdev; |
01f2e4ea | 1228 | struct sk_buff *skb; |
d19e22dc | 1229 | unsigned int len = netdev->mtu + ETH_HLEN; |
01f2e4ea SF |
1230 | unsigned int os_buf_index = 0; |
1231 | dma_addr_t dma_addr; | |
1232 | ||
89d71a66 | 1233 | skb = netdev_alloc_skb_ip_align(netdev, len); |
01f2e4ea SF |
1234 | if (!skb) |
1235 | return -ENOMEM; | |
1236 | ||
1237 | dma_addr = pci_map_single(enic->pdev, skb->data, | |
1238 | len, PCI_DMA_FROMDEVICE); | |
1239 | ||
1240 | enic_queue_rq_desc(rq, skb, os_buf_index, | |
1241 | dma_addr, len); | |
1242 | ||
1243 | return 0; | |
1244 | } | |
1245 | ||
4badc385 SF |
1246 | static int enic_rq_alloc_buf_a1(struct vnic_rq *rq) |
1247 | { | |
1248 | struct rq_enet_desc *desc = vnic_rq_next_desc(rq); | |
1249 | ||
1250 | if (vnic_rq_posting_soon(rq)) { | |
1251 | ||
1252 | /* SW workaround for A0 HW erratum: if we're just about | |
1253 | * to write posted_index, insert a dummy desc | |
1254 | * of type resvd | |
1255 | */ | |
1256 | ||
1257 | rq_enet_desc_enc(desc, 0, RQ_ENET_TYPE_RESV2, 0); | |
1258 | vnic_rq_post(rq, 0, 0, 0, 0); | |
1259 | } else { | |
1260 | return enic_rq_alloc_buf(rq); | |
1261 | } | |
1262 | ||
1263 | return 0; | |
1264 | } | |
1265 | ||
1266 | static int enic_set_rq_alloc_buf(struct enic *enic) | |
1267 | { | |
1268 | enum vnic_dev_hw_version hw_ver; | |
1269 | int err; | |
1270 | ||
1271 | err = vnic_dev_hw_version(enic->vdev, &hw_ver); | |
1272 | if (err) | |
1273 | return err; | |
1274 | ||
1275 | switch (hw_ver) { | |
1276 | case VNIC_DEV_HW_VER_A1: | |
1277 | enic->rq_alloc_buf = enic_rq_alloc_buf_a1; | |
1278 | break; | |
1279 | case VNIC_DEV_HW_VER_A2: | |
1280 | case VNIC_DEV_HW_VER_UNKNOWN: | |
1281 | enic->rq_alloc_buf = enic_rq_alloc_buf; | |
1282 | break; | |
1283 | default: | |
1284 | return -ENODEV; | |
1285 | } | |
1286 | ||
1287 | return 0; | |
1288 | } | |
1289 | ||
01f2e4ea SF |
1290 | static int enic_get_skb_header(struct sk_buff *skb, void **iphdr, |
1291 | void **tcph, u64 *hdr_flags, void *priv) | |
1292 | { | |
1293 | struct cq_enet_rq_desc *cq_desc = priv; | |
1294 | unsigned int ip_len; | |
1295 | struct iphdr *iph; | |
1296 | ||
1297 | u8 type, color, eop, sop, ingress_port, vlan_stripped; | |
1298 | u8 fcoe, fcoe_sof, fcoe_fc_crc_ok, fcoe_enc_error, fcoe_eof; | |
1299 | u8 tcp_udp_csum_ok, udp, tcp, ipv4_csum_ok; | |
1300 | u8 ipv6, ipv4, ipv4_fragment, fcs_ok, rss_type, csum_not_calc; | |
1301 | u8 packet_error; | |
1302 | u16 q_number, completed_index, bytes_written, vlan, checksum; | |
1303 | u32 rss_hash; | |
1304 | ||
1305 | cq_enet_rq_desc_dec(cq_desc, | |
1306 | &type, &color, &q_number, &completed_index, | |
1307 | &ingress_port, &fcoe, &eop, &sop, &rss_type, | |
1308 | &csum_not_calc, &rss_hash, &bytes_written, | |
1309 | &packet_error, &vlan_stripped, &vlan, &checksum, | |
1310 | &fcoe_sof, &fcoe_fc_crc_ok, &fcoe_enc_error, | |
1311 | &fcoe_eof, &tcp_udp_csum_ok, &udp, &tcp, | |
1312 | &ipv4_csum_ok, &ipv6, &ipv4, &ipv4_fragment, | |
1313 | &fcs_ok); | |
1314 | ||
1315 | if (!(ipv4 && tcp && !ipv4_fragment)) | |
1316 | return -1; | |
1317 | ||
1318 | skb_reset_network_header(skb); | |
1319 | iph = ip_hdr(skb); | |
1320 | ||
1321 | ip_len = ip_hdrlen(skb); | |
1322 | skb_set_transport_header(skb, ip_len); | |
1323 | ||
1324 | /* check if ip header and tcp header are complete */ | |
1325 | if (ntohs(iph->tot_len) < ip_len + tcp_hdrlen(skb)) | |
1326 | return -1; | |
1327 | ||
1328 | *hdr_flags = LRO_IPV4 | LRO_TCP; | |
1329 | *tcph = tcp_hdr(skb); | |
1330 | *iphdr = iph; | |
1331 | ||
1332 | return 0; | |
1333 | } | |
1334 | ||
1335 | static void enic_rq_indicate_buf(struct vnic_rq *rq, | |
1336 | struct cq_desc *cq_desc, struct vnic_rq_buf *buf, | |
1337 | int skipped, void *opaque) | |
1338 | { | |
1339 | struct enic *enic = vnic_dev_priv(rq->vdev); | |
86ca9db7 | 1340 | struct net_device *netdev = enic->netdev; |
01f2e4ea SF |
1341 | struct sk_buff *skb; |
1342 | ||
1343 | u8 type, color, eop, sop, ingress_port, vlan_stripped; | |
1344 | u8 fcoe, fcoe_sof, fcoe_fc_crc_ok, fcoe_enc_error, fcoe_eof; | |
1345 | u8 tcp_udp_csum_ok, udp, tcp, ipv4_csum_ok; | |
1346 | u8 ipv6, ipv4, ipv4_fragment, fcs_ok, rss_type, csum_not_calc; | |
1347 | u8 packet_error; | |
1348 | u16 q_number, completed_index, bytes_written, vlan, checksum; | |
1349 | u32 rss_hash; | |
1350 | ||
1351 | if (skipped) | |
1352 | return; | |
1353 | ||
1354 | skb = buf->os_buf; | |
1355 | prefetch(skb->data - NET_IP_ALIGN); | |
1356 | pci_unmap_single(enic->pdev, buf->dma_addr, | |
1357 | buf->len, PCI_DMA_FROMDEVICE); | |
1358 | ||
1359 | cq_enet_rq_desc_dec((struct cq_enet_rq_desc *)cq_desc, | |
1360 | &type, &color, &q_number, &completed_index, | |
1361 | &ingress_port, &fcoe, &eop, &sop, &rss_type, | |
1362 | &csum_not_calc, &rss_hash, &bytes_written, | |
1363 | &packet_error, &vlan_stripped, &vlan, &checksum, | |
1364 | &fcoe_sof, &fcoe_fc_crc_ok, &fcoe_enc_error, | |
1365 | &fcoe_eof, &tcp_udp_csum_ok, &udp, &tcp, | |
1366 | &ipv4_csum_ok, &ipv6, &ipv4, &ipv4_fragment, | |
1367 | &fcs_ok); | |
1368 | ||
1369 | if (packet_error) { | |
1370 | ||
350991e1 SF |
1371 | if (!fcs_ok) { |
1372 | if (bytes_written > 0) | |
1373 | enic->rq_bad_fcs++; | |
1374 | else if (bytes_written == 0) | |
1375 | enic->rq_truncated_pkts++; | |
1376 | } | |
01f2e4ea SF |
1377 | |
1378 | dev_kfree_skb_any(skb); | |
1379 | ||
1380 | return; | |
1381 | } | |
1382 | ||
1383 | if (eop && bytes_written > 0) { | |
1384 | ||
1385 | /* Good receive | |
1386 | */ | |
1387 | ||
1388 | skb_put(skb, bytes_written); | |
86ca9db7 | 1389 | skb->protocol = eth_type_trans(skb, netdev); |
01f2e4ea SF |
1390 | |
1391 | if (enic->csum_rx_enabled && !csum_not_calc) { | |
1392 | skb->csum = htons(checksum); | |
1393 | skb->ip_summed = CHECKSUM_COMPLETE; | |
1394 | } | |
1395 | ||
86ca9db7 | 1396 | skb->dev = netdev; |
01f2e4ea SF |
1397 | |
1398 | if (enic->vlan_group && vlan_stripped) { | |
1399 | ||
86ca9db7 | 1400 | if ((netdev->features & NETIF_F_LRO) && ipv4) |
01f2e4ea SF |
1401 | lro_vlan_hwaccel_receive_skb(&enic->lro_mgr, |
1402 | skb, enic->vlan_group, | |
1403 | vlan, cq_desc); | |
1404 | else | |
1405 | vlan_hwaccel_receive_skb(skb, | |
1406 | enic->vlan_group, vlan); | |
1407 | ||
1408 | } else { | |
1409 | ||
86ca9db7 | 1410 | if ((netdev->features & NETIF_F_LRO) && ipv4) |
01f2e4ea SF |
1411 | lro_receive_skb(&enic->lro_mgr, skb, cq_desc); |
1412 | else | |
1413 | netif_receive_skb(skb); | |
1414 | ||
1415 | } | |
1416 | ||
1417 | } else { | |
1418 | ||
1419 | /* Buffer overflow | |
1420 | */ | |
1421 | ||
1422 | dev_kfree_skb_any(skb); | |
1423 | } | |
1424 | } | |
1425 | ||
1426 | static int enic_rq_service(struct vnic_dev *vdev, struct cq_desc *cq_desc, | |
1427 | u8 type, u16 q_number, u16 completed_index, void *opaque) | |
1428 | { | |
1429 | struct enic *enic = vnic_dev_priv(vdev); | |
1430 | ||
1431 | vnic_rq_service(&enic->rq[q_number], cq_desc, | |
1432 | completed_index, VNIC_RQ_RETURN_DESC, | |
1433 | enic_rq_indicate_buf, opaque); | |
1434 | ||
1435 | return 0; | |
1436 | } | |
1437 | ||
01f2e4ea SF |
1438 | static int enic_poll(struct napi_struct *napi, int budget) |
1439 | { | |
1440 | struct enic *enic = container_of(napi, struct enic, napi); | |
1441 | struct net_device *netdev = enic->netdev; | |
1442 | unsigned int rq_work_to_do = budget; | |
1443 | unsigned int wq_work_to_do = -1; /* no limit */ | |
1444 | unsigned int work_done, rq_work_done, wq_work_done; | |
2d6ddced | 1445 | int err; |
01f2e4ea SF |
1446 | |
1447 | /* Service RQ (first) and WQ | |
1448 | */ | |
1449 | ||
1450 | rq_work_done = vnic_cq_service(&enic->cq[ENIC_CQ_RQ], | |
1451 | rq_work_to_do, enic_rq_service, NULL); | |
1452 | ||
1453 | wq_work_done = vnic_cq_service(&enic->cq[ENIC_CQ_WQ], | |
1454 | wq_work_to_do, enic_wq_service, NULL); | |
1455 | ||
1456 | /* Accumulate intr event credits for this polling | |
1457 | * cycle. An intr event is the completion of a | |
1458 | * a WQ or RQ packet. | |
1459 | */ | |
1460 | ||
1461 | work_done = rq_work_done + wq_work_done; | |
1462 | ||
1463 | if (work_done > 0) | |
1464 | vnic_intr_return_credits(&enic->intr[ENIC_INTX_WQ_RQ], | |
1465 | work_done, | |
1466 | 0 /* don't unmask intr */, | |
1467 | 0 /* don't reset intr timer */); | |
1468 | ||
2d6ddced | 1469 | err = vnic_rq_fill(&enic->rq[0], enic->rq_alloc_buf); |
01f2e4ea | 1470 | |
2d6ddced SF |
1471 | /* Buffer allocation failed. Stay in polling |
1472 | * mode so we can try to fill the ring again. | |
1473 | */ | |
01f2e4ea | 1474 | |
2d6ddced SF |
1475 | if (err) |
1476 | rq_work_done = rq_work_to_do; | |
01f2e4ea | 1477 | |
2d6ddced | 1478 | if (rq_work_done < rq_work_to_do) { |
01f2e4ea | 1479 | |
2d6ddced SF |
1480 | /* Some work done, but not enough to stay in polling, |
1481 | * flush all LROs and exit polling | |
01f2e4ea SF |
1482 | */ |
1483 | ||
86ca9db7 | 1484 | if (netdev->features & NETIF_F_LRO) |
01f2e4ea SF |
1485 | lro_flush_all(&enic->lro_mgr); |
1486 | ||
288379f0 | 1487 | napi_complete(napi); |
ed8af6b2 | 1488 | vnic_intr_unmask(&enic->intr[ENIC_INTX_WQ_RQ]); |
01f2e4ea SF |
1489 | } |
1490 | ||
1491 | return rq_work_done; | |
1492 | } | |
1493 | ||
1494 | static int enic_poll_msix(struct napi_struct *napi, int budget) | |
1495 | { | |
1496 | struct enic *enic = container_of(napi, struct enic, napi); | |
1497 | struct net_device *netdev = enic->netdev; | |
1498 | unsigned int work_to_do = budget; | |
1499 | unsigned int work_done; | |
2d6ddced | 1500 | int err; |
01f2e4ea SF |
1501 | |
1502 | /* Service RQ | |
1503 | */ | |
1504 | ||
1505 | work_done = vnic_cq_service(&enic->cq[ENIC_CQ_RQ], | |
1506 | work_to_do, enic_rq_service, NULL); | |
1507 | ||
2d6ddced SF |
1508 | /* Return intr event credits for this polling |
1509 | * cycle. An intr event is the completion of a | |
1510 | * RQ packet. | |
1511 | */ | |
01f2e4ea | 1512 | |
2d6ddced | 1513 | if (work_done > 0) |
01f2e4ea SF |
1514 | vnic_intr_return_credits(&enic->intr[ENIC_MSIX_RQ], |
1515 | work_done, | |
1516 | 0 /* don't unmask intr */, | |
1517 | 0 /* don't reset intr timer */); | |
01f2e4ea | 1518 | |
2d6ddced SF |
1519 | err = vnic_rq_fill(&enic->rq[0], enic->rq_alloc_buf); |
1520 | ||
1521 | /* Buffer allocation failed. Stay in polling mode | |
1522 | * so we can try to fill the ring again. | |
1523 | */ | |
1524 | ||
1525 | if (err) | |
1526 | work_done = work_to_do; | |
1527 | ||
1528 | if (work_done < work_to_do) { | |
1529 | ||
1530 | /* Some work done, but not enough to stay in polling, | |
1531 | * flush all LROs and exit polling | |
01f2e4ea SF |
1532 | */ |
1533 | ||
86ca9db7 | 1534 | if (netdev->features & NETIF_F_LRO) |
01f2e4ea SF |
1535 | lro_flush_all(&enic->lro_mgr); |
1536 | ||
288379f0 | 1537 | napi_complete(napi); |
01f2e4ea SF |
1538 | vnic_intr_unmask(&enic->intr[ENIC_MSIX_RQ]); |
1539 | } | |
1540 | ||
1541 | return work_done; | |
1542 | } | |
1543 | ||
1544 | static void enic_notify_timer(unsigned long data) | |
1545 | { | |
1546 | struct enic *enic = (struct enic *)data; | |
1547 | ||
1548 | enic_notify_check(enic); | |
1549 | ||
25f0a061 SF |
1550 | mod_timer(&enic->notify_timer, |
1551 | round_jiffies(jiffies + ENIC_NOTIFY_TIMER_PERIOD)); | |
01f2e4ea SF |
1552 | } |
1553 | ||
1554 | static void enic_free_intr(struct enic *enic) | |
1555 | { | |
1556 | struct net_device *netdev = enic->netdev; | |
1557 | unsigned int i; | |
1558 | ||
1559 | switch (vnic_dev_get_intr_mode(enic->vdev)) { | |
1560 | case VNIC_DEV_INTR_MODE_INTX: | |
01f2e4ea SF |
1561 | free_irq(enic->pdev->irq, netdev); |
1562 | break; | |
8f4d248c SF |
1563 | case VNIC_DEV_INTR_MODE_MSI: |
1564 | free_irq(enic->pdev->irq, enic); | |
1565 | break; | |
01f2e4ea SF |
1566 | case VNIC_DEV_INTR_MODE_MSIX: |
1567 | for (i = 0; i < ARRAY_SIZE(enic->msix); i++) | |
1568 | if (enic->msix[i].requested) | |
1569 | free_irq(enic->msix_entry[i].vector, | |
1570 | enic->msix[i].devid); | |
1571 | break; | |
1572 | default: | |
1573 | break; | |
1574 | } | |
1575 | } | |
1576 | ||
1577 | static int enic_request_intr(struct enic *enic) | |
1578 | { | |
1579 | struct net_device *netdev = enic->netdev; | |
1580 | unsigned int i; | |
1581 | int err = 0; | |
1582 | ||
1583 | switch (vnic_dev_get_intr_mode(enic->vdev)) { | |
1584 | ||
1585 | case VNIC_DEV_INTR_MODE_INTX: | |
1586 | ||
1587 | err = request_irq(enic->pdev->irq, enic_isr_legacy, | |
1588 | IRQF_SHARED, netdev->name, netdev); | |
1589 | break; | |
1590 | ||
1591 | case VNIC_DEV_INTR_MODE_MSI: | |
1592 | ||
1593 | err = request_irq(enic->pdev->irq, enic_isr_msi, | |
1594 | 0, netdev->name, enic); | |
1595 | break; | |
1596 | ||
1597 | case VNIC_DEV_INTR_MODE_MSIX: | |
1598 | ||
1599 | sprintf(enic->msix[ENIC_MSIX_RQ].devname, | |
8f4d248c | 1600 | "%.11s-rx-0", netdev->name); |
01f2e4ea SF |
1601 | enic->msix[ENIC_MSIX_RQ].isr = enic_isr_msix_rq; |
1602 | enic->msix[ENIC_MSIX_RQ].devid = enic; | |
1603 | ||
1604 | sprintf(enic->msix[ENIC_MSIX_WQ].devname, | |
8f4d248c | 1605 | "%.11s-tx-0", netdev->name); |
01f2e4ea SF |
1606 | enic->msix[ENIC_MSIX_WQ].isr = enic_isr_msix_wq; |
1607 | enic->msix[ENIC_MSIX_WQ].devid = enic; | |
1608 | ||
1609 | sprintf(enic->msix[ENIC_MSIX_ERR].devname, | |
1610 | "%.11s-err", netdev->name); | |
1611 | enic->msix[ENIC_MSIX_ERR].isr = enic_isr_msix_err; | |
1612 | enic->msix[ENIC_MSIX_ERR].devid = enic; | |
1613 | ||
1614 | sprintf(enic->msix[ENIC_MSIX_NOTIFY].devname, | |
1615 | "%.11s-notify", netdev->name); | |
1616 | enic->msix[ENIC_MSIX_NOTIFY].isr = enic_isr_msix_notify; | |
1617 | enic->msix[ENIC_MSIX_NOTIFY].devid = enic; | |
1618 | ||
1619 | for (i = 0; i < ARRAY_SIZE(enic->msix); i++) { | |
1620 | err = request_irq(enic->msix_entry[i].vector, | |
1621 | enic->msix[i].isr, 0, | |
1622 | enic->msix[i].devname, | |
1623 | enic->msix[i].devid); | |
1624 | if (err) { | |
1625 | enic_free_intr(enic); | |
1626 | break; | |
1627 | } | |
1628 | enic->msix[i].requested = 1; | |
1629 | } | |
1630 | ||
1631 | break; | |
1632 | ||
1633 | default: | |
1634 | break; | |
1635 | } | |
1636 | ||
1637 | return err; | |
1638 | } | |
1639 | ||
b3d18d19 SF |
1640 | static void enic_synchronize_irqs(struct enic *enic) |
1641 | { | |
1642 | unsigned int i; | |
1643 | ||
1644 | switch (vnic_dev_get_intr_mode(enic->vdev)) { | |
1645 | case VNIC_DEV_INTR_MODE_INTX: | |
1646 | case VNIC_DEV_INTR_MODE_MSI: | |
1647 | synchronize_irq(enic->pdev->irq); | |
1648 | break; | |
1649 | case VNIC_DEV_INTR_MODE_MSIX: | |
1650 | for (i = 0; i < enic->intr_count; i++) | |
1651 | synchronize_irq(enic->msix_entry[i].vector); | |
1652 | break; | |
1653 | default: | |
1654 | break; | |
1655 | } | |
1656 | } | |
1657 | ||
01f2e4ea SF |
1658 | static int enic_notify_set(struct enic *enic) |
1659 | { | |
1660 | int err; | |
1661 | ||
56ac88b3 | 1662 | spin_lock(&enic->devcmd_lock); |
01f2e4ea SF |
1663 | switch (vnic_dev_get_intr_mode(enic->vdev)) { |
1664 | case VNIC_DEV_INTR_MODE_INTX: | |
1665 | err = vnic_dev_notify_set(enic->vdev, ENIC_INTX_NOTIFY); | |
1666 | break; | |
1667 | case VNIC_DEV_INTR_MODE_MSIX: | |
1668 | err = vnic_dev_notify_set(enic->vdev, ENIC_MSIX_NOTIFY); | |
1669 | break; | |
1670 | default: | |
1671 | err = vnic_dev_notify_set(enic->vdev, -1 /* no intr */); | |
1672 | break; | |
1673 | } | |
56ac88b3 | 1674 | spin_unlock(&enic->devcmd_lock); |
01f2e4ea SF |
1675 | |
1676 | return err; | |
1677 | } | |
1678 | ||
1679 | static void enic_notify_timer_start(struct enic *enic) | |
1680 | { | |
1681 | switch (vnic_dev_get_intr_mode(enic->vdev)) { | |
1682 | case VNIC_DEV_INTR_MODE_MSI: | |
1683 | mod_timer(&enic->notify_timer, jiffies); | |
1684 | break; | |
1685 | default: | |
1686 | /* Using intr for notification for INTx/MSI-X */ | |
1687 | break; | |
1688 | }; | |
1689 | } | |
1690 | ||
1691 | /* rtnl lock is held, process context */ | |
1692 | static int enic_open(struct net_device *netdev) | |
1693 | { | |
1694 | struct enic *enic = netdev_priv(netdev); | |
1695 | unsigned int i; | |
1696 | int err; | |
1697 | ||
4b75a442 SF |
1698 | err = enic_request_intr(enic); |
1699 | if (err) { | |
1700 | printk(KERN_ERR PFX "%s: Unable to request irq.\n", | |
1701 | netdev->name); | |
1702 | return err; | |
1703 | } | |
1704 | ||
1705 | err = enic_notify_set(enic); | |
1706 | if (err) { | |
1707 | printk(KERN_ERR PFX | |
1708 | "%s: Failed to alloc notify buffer, aborting.\n", | |
1709 | netdev->name); | |
1710 | goto err_out_free_intr; | |
1711 | } | |
1712 | ||
01f2e4ea | 1713 | for (i = 0; i < enic->rq_count; i++) { |
2d6ddced SF |
1714 | vnic_rq_fill(&enic->rq[i], enic->rq_alloc_buf); |
1715 | /* Need at least one buffer on ring to get going */ | |
1716 | if (vnic_rq_desc_used(&enic->rq[i]) == 0) { | |
01f2e4ea SF |
1717 | printk(KERN_ERR PFX |
1718 | "%s: Unable to alloc receive buffers.\n", | |
1719 | netdev->name); | |
2d6ddced | 1720 | err = -ENOMEM; |
4b75a442 | 1721 | goto err_out_notify_unset; |
01f2e4ea SF |
1722 | } |
1723 | } | |
1724 | ||
1725 | for (i = 0; i < enic->wq_count; i++) | |
1726 | vnic_wq_enable(&enic->wq[i]); | |
1727 | for (i = 0; i < enic->rq_count; i++) | |
1728 | vnic_rq_enable(&enic->rq[i]); | |
1729 | ||
f8bd9091 | 1730 | enic_dev_add_station_addr(enic); |
01f2e4ea SF |
1731 | enic_set_multicast_list(netdev); |
1732 | ||
1733 | netif_wake_queue(netdev); | |
1734 | napi_enable(&enic->napi); | |
56ac88b3 | 1735 | spin_lock(&enic->devcmd_lock); |
01f2e4ea | 1736 | vnic_dev_enable(enic->vdev); |
56ac88b3 | 1737 | spin_unlock(&enic->devcmd_lock); |
01f2e4ea SF |
1738 | |
1739 | for (i = 0; i < enic->intr_count; i++) | |
1740 | vnic_intr_unmask(&enic->intr[i]); | |
1741 | ||
1742 | enic_notify_timer_start(enic); | |
1743 | ||
1744 | return 0; | |
4b75a442 SF |
1745 | |
1746 | err_out_notify_unset: | |
56ac88b3 | 1747 | spin_lock(&enic->devcmd_lock); |
4b75a442 | 1748 | vnic_dev_notify_unset(enic->vdev); |
56ac88b3 | 1749 | spin_unlock(&enic->devcmd_lock); |
4b75a442 SF |
1750 | err_out_free_intr: |
1751 | enic_free_intr(enic); | |
1752 | ||
1753 | return err; | |
01f2e4ea SF |
1754 | } |
1755 | ||
1756 | /* rtnl lock is held, process context */ | |
1757 | static int enic_stop(struct net_device *netdev) | |
1758 | { | |
1759 | struct enic *enic = netdev_priv(netdev); | |
1760 | unsigned int i; | |
1761 | int err; | |
1762 | ||
b3d18d19 SF |
1763 | for (i = 0; i < enic->intr_count; i++) |
1764 | vnic_intr_mask(&enic->intr[i]); | |
1765 | ||
1766 | enic_synchronize_irqs(enic); | |
1767 | ||
01f2e4ea SF |
1768 | del_timer_sync(&enic->notify_timer); |
1769 | ||
56ac88b3 | 1770 | spin_lock(&enic->devcmd_lock); |
01f2e4ea | 1771 | vnic_dev_disable(enic->vdev); |
56ac88b3 | 1772 | spin_unlock(&enic->devcmd_lock); |
01f2e4ea | 1773 | napi_disable(&enic->napi); |
b3d18d19 SF |
1774 | netif_carrier_off(netdev); |
1775 | netif_tx_disable(netdev); | |
01f2e4ea | 1776 | |
f8bd9091 SF |
1777 | enic_dev_del_station_addr(enic); |
1778 | ||
01f2e4ea SF |
1779 | for (i = 0; i < enic->wq_count; i++) { |
1780 | err = vnic_wq_disable(&enic->wq[i]); | |
1781 | if (err) | |
1782 | return err; | |
1783 | } | |
1784 | for (i = 0; i < enic->rq_count; i++) { | |
1785 | err = vnic_rq_disable(&enic->rq[i]); | |
1786 | if (err) | |
1787 | return err; | |
1788 | } | |
1789 | ||
56ac88b3 | 1790 | spin_lock(&enic->devcmd_lock); |
4b75a442 | 1791 | vnic_dev_notify_unset(enic->vdev); |
56ac88b3 | 1792 | spin_unlock(&enic->devcmd_lock); |
4b75a442 SF |
1793 | enic_free_intr(enic); |
1794 | ||
01f2e4ea SF |
1795 | for (i = 0; i < enic->wq_count; i++) |
1796 | vnic_wq_clean(&enic->wq[i], enic_free_wq_buf); | |
1797 | for (i = 0; i < enic->rq_count; i++) | |
1798 | vnic_rq_clean(&enic->rq[i], enic_free_rq_buf); | |
1799 | for (i = 0; i < enic->cq_count; i++) | |
1800 | vnic_cq_clean(&enic->cq[i]); | |
1801 | for (i = 0; i < enic->intr_count; i++) | |
1802 | vnic_intr_clean(&enic->intr[i]); | |
1803 | ||
1804 | return 0; | |
1805 | } | |
1806 | ||
1807 | static int enic_change_mtu(struct net_device *netdev, int new_mtu) | |
1808 | { | |
1809 | struct enic *enic = netdev_priv(netdev); | |
1810 | int running = netif_running(netdev); | |
1811 | ||
25f0a061 SF |
1812 | if (new_mtu < ENIC_MIN_MTU || new_mtu > ENIC_MAX_MTU) |
1813 | return -EINVAL; | |
1814 | ||
01f2e4ea SF |
1815 | if (running) |
1816 | enic_stop(netdev); | |
1817 | ||
01f2e4ea SF |
1818 | netdev->mtu = new_mtu; |
1819 | ||
1820 | if (netdev->mtu > enic->port_mtu) | |
1821 | printk(KERN_WARNING PFX | |
1822 | "%s: interface MTU (%d) set higher " | |
1823 | "than port MTU (%d)\n", | |
1824 | netdev->name, netdev->mtu, enic->port_mtu); | |
1825 | ||
1826 | if (running) | |
1827 | enic_open(netdev); | |
1828 | ||
1829 | return 0; | |
1830 | } | |
1831 | ||
1832 | #ifdef CONFIG_NET_POLL_CONTROLLER | |
1833 | static void enic_poll_controller(struct net_device *netdev) | |
1834 | { | |
1835 | struct enic *enic = netdev_priv(netdev); | |
1836 | struct vnic_dev *vdev = enic->vdev; | |
1837 | ||
1838 | switch (vnic_dev_get_intr_mode(vdev)) { | |
1839 | case VNIC_DEV_INTR_MODE_MSIX: | |
1840 | enic_isr_msix_rq(enic->pdev->irq, enic); | |
1841 | enic_isr_msix_wq(enic->pdev->irq, enic); | |
1842 | break; | |
1843 | case VNIC_DEV_INTR_MODE_MSI: | |
1844 | enic_isr_msi(enic->pdev->irq, enic); | |
1845 | break; | |
1846 | case VNIC_DEV_INTR_MODE_INTX: | |
1847 | enic_isr_legacy(enic->pdev->irq, netdev); | |
1848 | break; | |
1849 | default: | |
1850 | break; | |
1851 | } | |
1852 | } | |
1853 | #endif | |
1854 | ||
1855 | static int enic_dev_wait(struct vnic_dev *vdev, | |
1856 | int (*start)(struct vnic_dev *, int), | |
1857 | int (*finished)(struct vnic_dev *, int *), | |
1858 | int arg) | |
1859 | { | |
1860 | unsigned long time; | |
1861 | int done; | |
1862 | int err; | |
1863 | ||
1864 | BUG_ON(in_interrupt()); | |
1865 | ||
1866 | err = start(vdev, arg); | |
1867 | if (err) | |
1868 | return err; | |
1869 | ||
1870 | /* Wait for func to complete...2 seconds max | |
1871 | */ | |
1872 | ||
1873 | time = jiffies + (HZ * 2); | |
1874 | do { | |
1875 | ||
1876 | err = finished(vdev, &done); | |
1877 | if (err) | |
1878 | return err; | |
1879 | ||
1880 | if (done) | |
1881 | return 0; | |
1882 | ||
1883 | schedule_timeout_uninterruptible(HZ / 10); | |
1884 | ||
1885 | } while (time_after(time, jiffies)); | |
1886 | ||
1887 | return -ETIMEDOUT; | |
1888 | } | |
1889 | ||
1890 | static int enic_dev_open(struct enic *enic) | |
1891 | { | |
1892 | int err; | |
1893 | ||
1894 | err = enic_dev_wait(enic->vdev, vnic_dev_open, | |
1895 | vnic_dev_open_done, 0); | |
1896 | if (err) | |
1897 | printk(KERN_ERR PFX | |
1898 | "vNIC device open failed, err %d.\n", err); | |
1899 | ||
1900 | return err; | |
1901 | } | |
1902 | ||
1903 | static int enic_dev_soft_reset(struct enic *enic) | |
1904 | { | |
1905 | int err; | |
1906 | ||
1907 | err = enic_dev_wait(enic->vdev, vnic_dev_soft_reset, | |
1908 | vnic_dev_soft_reset_done, 0); | |
1909 | if (err) | |
1910 | printk(KERN_ERR PFX | |
1911 | "vNIC soft reset failed, err %d.\n", err); | |
1912 | ||
1913 | return err; | |
1914 | } | |
1915 | ||
68f71708 SF |
1916 | static int enic_set_niccfg(struct enic *enic) |
1917 | { | |
1918 | const u8 rss_default_cpu = 0; | |
1919 | const u8 rss_hash_type = 0; | |
1920 | const u8 rss_hash_bits = 0; | |
1921 | const u8 rss_base_cpu = 0; | |
1922 | const u8 rss_enable = 0; | |
1923 | const u8 tso_ipid_split_en = 0; | |
1924 | const u8 ig_vlan_strip_en = 1; | |
1925 | ||
1926 | /* Enable VLAN tag stripping. RSS not enabled (yet). | |
6ba9cdc0 | 1927 | */ |
68f71708 SF |
1928 | |
1929 | return enic_set_nic_cfg(enic, | |
1930 | rss_default_cpu, rss_hash_type, | |
1931 | rss_hash_bits, rss_base_cpu, | |
1932 | rss_enable, tso_ipid_split_en, | |
1933 | ig_vlan_strip_en); | |
1934 | } | |
1935 | ||
01f2e4ea SF |
1936 | static void enic_reset(struct work_struct *work) |
1937 | { | |
1938 | struct enic *enic = container_of(work, struct enic, reset); | |
1939 | ||
1940 | if (!netif_running(enic->netdev)) | |
1941 | return; | |
1942 | ||
1943 | rtnl_lock(); | |
1944 | ||
1945 | spin_lock(&enic->devcmd_lock); | |
1946 | vnic_dev_hang_notify(enic->vdev); | |
1947 | spin_unlock(&enic->devcmd_lock); | |
1948 | ||
1949 | enic_stop(enic->netdev); | |
1950 | enic_dev_soft_reset(enic); | |
68f71708 | 1951 | vnic_dev_init(enic->vdev, 0); |
01f2e4ea SF |
1952 | enic_reset_mcaddrs(enic); |
1953 | enic_init_vnic_resources(enic); | |
68f71708 | 1954 | enic_set_niccfg(enic); |
01f2e4ea SF |
1955 | enic_open(enic->netdev); |
1956 | ||
1957 | rtnl_unlock(); | |
1958 | } | |
1959 | ||
1960 | static int enic_set_intr_mode(struct enic *enic) | |
1961 | { | |
6ba9cdc0 SF |
1962 | unsigned int n = 1; |
1963 | unsigned int m = 1; | |
01f2e4ea SF |
1964 | unsigned int i; |
1965 | ||
1966 | /* Set interrupt mode (INTx, MSI, MSI-X) depending | |
1967 | * system capabilities. | |
1968 | * | |
1969 | * Try MSI-X first | |
1970 | * | |
1971 | * We need n RQs, m WQs, n+m CQs, and n+m+2 INTRs | |
1972 | * (the second to last INTR is used for WQ/RQ errors) | |
1973 | * (the last INTR is used for notifications) | |
1974 | */ | |
1975 | ||
1976 | BUG_ON(ARRAY_SIZE(enic->msix_entry) < n + m + 2); | |
1977 | for (i = 0; i < n + m + 2; i++) | |
1978 | enic->msix_entry[i].entry = i; | |
1979 | ||
1980 | if (enic->config.intr_mode < 1 && | |
1981 | enic->rq_count >= n && | |
1982 | enic->wq_count >= m && | |
1983 | enic->cq_count >= n + m && | |
1984 | enic->intr_count >= n + m + 2 && | |
1985 | !pci_enable_msix(enic->pdev, enic->msix_entry, n + m + 2)) { | |
1986 | ||
1987 | enic->rq_count = n; | |
1988 | enic->wq_count = m; | |
1989 | enic->cq_count = n + m; | |
1990 | enic->intr_count = n + m + 2; | |
1991 | ||
1992 | vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_MSIX); | |
1993 | ||
1994 | return 0; | |
1995 | } | |
1996 | ||
1997 | /* Next try MSI | |
1998 | * | |
1999 | * We need 1 RQ, 1 WQ, 2 CQs, and 1 INTR | |
2000 | */ | |
2001 | ||
2002 | if (enic->config.intr_mode < 2 && | |
2003 | enic->rq_count >= 1 && | |
2004 | enic->wq_count >= 1 && | |
2005 | enic->cq_count >= 2 && | |
2006 | enic->intr_count >= 1 && | |
2007 | !pci_enable_msi(enic->pdev)) { | |
2008 | ||
2009 | enic->rq_count = 1; | |
2010 | enic->wq_count = 1; | |
2011 | enic->cq_count = 2; | |
2012 | enic->intr_count = 1; | |
2013 | ||
2014 | vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_MSI); | |
2015 | ||
2016 | return 0; | |
2017 | } | |
2018 | ||
2019 | /* Next try INTx | |
2020 | * | |
2021 | * We need 1 RQ, 1 WQ, 2 CQs, and 3 INTRs | |
2022 | * (the first INTR is used for WQ/RQ) | |
2023 | * (the second INTR is used for WQ/RQ errors) | |
2024 | * (the last INTR is used for notifications) | |
2025 | */ | |
2026 | ||
2027 | if (enic->config.intr_mode < 3 && | |
2028 | enic->rq_count >= 1 && | |
2029 | enic->wq_count >= 1 && | |
2030 | enic->cq_count >= 2 && | |
2031 | enic->intr_count >= 3) { | |
2032 | ||
2033 | enic->rq_count = 1; | |
2034 | enic->wq_count = 1; | |
2035 | enic->cq_count = 2; | |
2036 | enic->intr_count = 3; | |
2037 | ||
2038 | vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_INTX); | |
2039 | ||
2040 | return 0; | |
2041 | } | |
2042 | ||
2043 | vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_UNKNOWN); | |
2044 | ||
2045 | return -EINVAL; | |
2046 | } | |
2047 | ||
2048 | static void enic_clear_intr_mode(struct enic *enic) | |
2049 | { | |
2050 | switch (vnic_dev_get_intr_mode(enic->vdev)) { | |
2051 | case VNIC_DEV_INTR_MODE_MSIX: | |
2052 | pci_disable_msix(enic->pdev); | |
2053 | break; | |
2054 | case VNIC_DEV_INTR_MODE_MSI: | |
2055 | pci_disable_msi(enic->pdev); | |
2056 | break; | |
2057 | default: | |
2058 | break; | |
2059 | } | |
2060 | ||
2061 | vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_UNKNOWN); | |
2062 | } | |
2063 | ||
f8bd9091 SF |
2064 | static const struct net_device_ops enic_netdev_dynamic_ops = { |
2065 | .ndo_open = enic_open, | |
2066 | .ndo_stop = enic_stop, | |
2067 | .ndo_start_xmit = enic_hard_start_xmit, | |
2068 | .ndo_get_stats = enic_get_stats, | |
2069 | .ndo_validate_addr = eth_validate_addr, | |
2070 | .ndo_set_multicast_list = enic_set_multicast_list, | |
2071 | .ndo_set_mac_address = enic_set_mac_address_dynamic, | |
2072 | .ndo_change_mtu = enic_change_mtu, | |
2073 | .ndo_vlan_rx_register = enic_vlan_rx_register, | |
2074 | .ndo_vlan_rx_add_vid = enic_vlan_rx_add_vid, | |
2075 | .ndo_vlan_rx_kill_vid = enic_vlan_rx_kill_vid, | |
2076 | .ndo_tx_timeout = enic_tx_timeout, | |
2077 | .ndo_set_vf_port = enic_set_vf_port, | |
2078 | .ndo_get_vf_port = enic_get_vf_port, | |
2079 | #ifdef CONFIG_NET_POLL_CONTROLLER | |
2080 | .ndo_poll_controller = enic_poll_controller, | |
2081 | #endif | |
2082 | }; | |
2083 | ||
afe29f7a SH |
2084 | static const struct net_device_ops enic_netdev_ops = { |
2085 | .ndo_open = enic_open, | |
2086 | .ndo_stop = enic_stop, | |
00829823 | 2087 | .ndo_start_xmit = enic_hard_start_xmit, |
afe29f7a SH |
2088 | .ndo_get_stats = enic_get_stats, |
2089 | .ndo_validate_addr = eth_validate_addr, | |
2090 | .ndo_set_multicast_list = enic_set_multicast_list, | |
f8bd9091 | 2091 | .ndo_set_mac_address = enic_set_mac_address, |
afe29f7a SH |
2092 | .ndo_change_mtu = enic_change_mtu, |
2093 | .ndo_vlan_rx_register = enic_vlan_rx_register, | |
2094 | .ndo_vlan_rx_add_vid = enic_vlan_rx_add_vid, | |
2095 | .ndo_vlan_rx_kill_vid = enic_vlan_rx_kill_vid, | |
2096 | .ndo_tx_timeout = enic_tx_timeout, | |
2097 | #ifdef CONFIG_NET_POLL_CONTROLLER | |
2098 | .ndo_poll_controller = enic_poll_controller, | |
2099 | #endif | |
2100 | }; | |
2101 | ||
6fdfa970 SF |
2102 | void enic_dev_deinit(struct enic *enic) |
2103 | { | |
2104 | netif_napi_del(&enic->napi); | |
2105 | enic_free_vnic_resources(enic); | |
2106 | enic_clear_intr_mode(enic); | |
2107 | } | |
2108 | ||
2109 | int enic_dev_init(struct enic *enic) | |
2110 | { | |
2111 | struct net_device *netdev = enic->netdev; | |
2112 | int err; | |
2113 | ||
2114 | /* Get vNIC configuration | |
2115 | */ | |
2116 | ||
2117 | err = enic_get_vnic_config(enic); | |
2118 | if (err) { | |
2119 | printk(KERN_ERR PFX | |
2120 | "Get vNIC configuration failed, aborting.\n"); | |
2121 | return err; | |
2122 | } | |
2123 | ||
2124 | /* Get available resource counts | |
2125 | */ | |
2126 | ||
2127 | enic_get_res_counts(enic); | |
2128 | ||
2129 | /* Set interrupt mode based on resource counts and system | |
2130 | * capabilities | |
2131 | */ | |
2132 | ||
2133 | err = enic_set_intr_mode(enic); | |
2134 | if (err) { | |
2135 | printk(KERN_ERR PFX | |
d87fd25d SF |
2136 | "Failed to set intr mode based on resource " |
2137 | "counts and system capabilities, aborting.\n"); | |
6fdfa970 SF |
2138 | return err; |
2139 | } | |
2140 | ||
2141 | /* Allocate and configure vNIC resources | |
2142 | */ | |
2143 | ||
2144 | err = enic_alloc_vnic_resources(enic); | |
2145 | if (err) { | |
2146 | printk(KERN_ERR PFX | |
2147 | "Failed to alloc vNIC resources, aborting.\n"); | |
2148 | goto err_out_free_vnic_resources; | |
2149 | } | |
2150 | ||
2151 | enic_init_vnic_resources(enic); | |
2152 | ||
2153 | err = enic_set_rq_alloc_buf(enic); | |
2154 | if (err) { | |
2155 | printk(KERN_ERR PFX | |
2156 | "Failed to set RQ buffer allocator, aborting.\n"); | |
2157 | goto err_out_free_vnic_resources; | |
2158 | } | |
2159 | ||
2160 | err = enic_set_niccfg(enic); | |
2161 | if (err) { | |
2162 | printk(KERN_ERR PFX | |
2163 | "Failed to config nic, aborting.\n"); | |
2164 | goto err_out_free_vnic_resources; | |
2165 | } | |
2166 | ||
2167 | switch (vnic_dev_get_intr_mode(enic->vdev)) { | |
2168 | default: | |
2169 | netif_napi_add(netdev, &enic->napi, enic_poll, 64); | |
2170 | break; | |
2171 | case VNIC_DEV_INTR_MODE_MSIX: | |
2172 | netif_napi_add(netdev, &enic->napi, enic_poll_msix, 64); | |
2173 | break; | |
2174 | } | |
2175 | ||
2176 | return 0; | |
2177 | ||
2178 | err_out_free_vnic_resources: | |
2179 | enic_clear_intr_mode(enic); | |
2180 | enic_free_vnic_resources(enic); | |
2181 | ||
2182 | return err; | |
2183 | } | |
2184 | ||
27e6c7d3 SF |
2185 | static void enic_iounmap(struct enic *enic) |
2186 | { | |
2187 | unsigned int i; | |
2188 | ||
2189 | for (i = 0; i < ARRAY_SIZE(enic->bar); i++) | |
2190 | if (enic->bar[i].vaddr) | |
2191 | iounmap(enic->bar[i].vaddr); | |
2192 | } | |
2193 | ||
01f2e4ea SF |
2194 | static int __devinit enic_probe(struct pci_dev *pdev, |
2195 | const struct pci_device_id *ent) | |
2196 | { | |
2197 | struct net_device *netdev; | |
2198 | struct enic *enic; | |
2199 | int using_dac = 0; | |
2200 | unsigned int i; | |
2201 | int err; | |
2202 | ||
01f2e4ea SF |
2203 | /* Allocate net device structure and initialize. Private |
2204 | * instance data is initialized to zero. | |
2205 | */ | |
2206 | ||
2207 | netdev = alloc_etherdev(sizeof(struct enic)); | |
2208 | if (!netdev) { | |
2209 | printk(KERN_ERR PFX "Etherdev alloc failed, aborting.\n"); | |
2210 | return -ENOMEM; | |
2211 | } | |
2212 | ||
01f2e4ea SF |
2213 | pci_set_drvdata(pdev, netdev); |
2214 | ||
2215 | SET_NETDEV_DEV(netdev, &pdev->dev); | |
2216 | ||
2217 | enic = netdev_priv(netdev); | |
2218 | enic->netdev = netdev; | |
2219 | enic->pdev = pdev; | |
2220 | ||
2221 | /* Setup PCI resources | |
2222 | */ | |
2223 | ||
2224 | err = pci_enable_device(pdev); | |
2225 | if (err) { | |
2226 | printk(KERN_ERR PFX | |
4b75a442 | 2227 | "Cannot enable PCI device, aborting.\n"); |
01f2e4ea SF |
2228 | goto err_out_free_netdev; |
2229 | } | |
2230 | ||
2231 | err = pci_request_regions(pdev, DRV_NAME); | |
2232 | if (err) { | |
2233 | printk(KERN_ERR PFX | |
4b75a442 | 2234 | "Cannot request PCI regions, aborting.\n"); |
01f2e4ea SF |
2235 | goto err_out_disable_device; |
2236 | } | |
2237 | ||
2238 | pci_set_master(pdev); | |
2239 | ||
2240 | /* Query PCI controller on system for DMA addressing | |
2241 | * limitation for the device. Try 40-bit first, and | |
2242 | * fail to 32-bit. | |
2243 | */ | |
2244 | ||
50cf156a | 2245 | err = pci_set_dma_mask(pdev, DMA_BIT_MASK(40)); |
01f2e4ea | 2246 | if (err) { |
284901a9 | 2247 | err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32)); |
01f2e4ea SF |
2248 | if (err) { |
2249 | printk(KERN_ERR PFX | |
4b75a442 | 2250 | "No usable DMA configuration, aborting.\n"); |
01f2e4ea SF |
2251 | goto err_out_release_regions; |
2252 | } | |
284901a9 | 2253 | err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)); |
01f2e4ea SF |
2254 | if (err) { |
2255 | printk(KERN_ERR PFX | |
4b75a442 SF |
2256 | "Unable to obtain 32-bit DMA " |
2257 | "for consistent allocations, aborting.\n"); | |
01f2e4ea SF |
2258 | goto err_out_release_regions; |
2259 | } | |
2260 | } else { | |
50cf156a | 2261 | err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(40)); |
01f2e4ea SF |
2262 | if (err) { |
2263 | printk(KERN_ERR PFX | |
4b75a442 SF |
2264 | "Unable to obtain 40-bit DMA " |
2265 | "for consistent allocations, aborting.\n"); | |
01f2e4ea SF |
2266 | goto err_out_release_regions; |
2267 | } | |
2268 | using_dac = 1; | |
2269 | } | |
2270 | ||
27e6c7d3 | 2271 | /* Map vNIC resources from BAR0-5 |
01f2e4ea SF |
2272 | */ |
2273 | ||
27e6c7d3 SF |
2274 | for (i = 0; i < ARRAY_SIZE(enic->bar); i++) { |
2275 | if (!(pci_resource_flags(pdev, i) & IORESOURCE_MEM)) | |
2276 | continue; | |
2277 | enic->bar[i].len = pci_resource_len(pdev, i); | |
2278 | enic->bar[i].vaddr = pci_iomap(pdev, i, enic->bar[i].len); | |
2279 | if (!enic->bar[i].vaddr) { | |
2280 | printk(KERN_ERR PFX | |
2281 | "Cannot memory-map BAR %d, aborting.\n", i); | |
2282 | err = -ENODEV; | |
2283 | goto err_out_iounmap; | |
2284 | } | |
2285 | enic->bar[i].bus_addr = pci_resource_start(pdev, i); | |
01f2e4ea SF |
2286 | } |
2287 | ||
2288 | /* Register vNIC device | |
2289 | */ | |
2290 | ||
27e6c7d3 SF |
2291 | enic->vdev = vnic_dev_register(NULL, enic, pdev, enic->bar, |
2292 | ARRAY_SIZE(enic->bar)); | |
01f2e4ea SF |
2293 | if (!enic->vdev) { |
2294 | printk(KERN_ERR PFX | |
4b75a442 | 2295 | "vNIC registration failed, aborting.\n"); |
01f2e4ea SF |
2296 | err = -ENODEV; |
2297 | goto err_out_iounmap; | |
2298 | } | |
2299 | ||
2300 | /* Issue device open to get device in known state | |
2301 | */ | |
2302 | ||
2303 | err = enic_dev_open(enic); | |
2304 | if (err) { | |
2305 | printk(KERN_ERR PFX | |
4b75a442 | 2306 | "vNIC dev open failed, aborting.\n"); |
01f2e4ea SF |
2307 | goto err_out_vnic_unregister; |
2308 | } | |
2309 | ||
2310 | /* Issue device init to initialize the vnic-to-switch link. | |
2311 | * We'll start with carrier off and wait for link UP | |
2312 | * notification later to turn on carrier. We don't need | |
2313 | * to wait here for the vnic-to-switch link initialization | |
2314 | * to complete; link UP notification is the indication that | |
2315 | * the process is complete. | |
2316 | */ | |
2317 | ||
2318 | netif_carrier_off(netdev); | |
2319 | ||
f8bd9091 SF |
2320 | if (!enic_is_dynamic(enic)) { |
2321 | err = vnic_dev_init(enic->vdev, 0); | |
2322 | if (err) { | |
2323 | printk(KERN_ERR PFX | |
2324 | "vNIC dev init failed, aborting.\n"); | |
2325 | goto err_out_dev_close; | |
2326 | } | |
01f2e4ea SF |
2327 | } |
2328 | ||
6fdfa970 | 2329 | err = enic_dev_init(enic); |
01f2e4ea SF |
2330 | if (err) { |
2331 | printk(KERN_ERR PFX | |
6fdfa970 | 2332 | "Device initialization failed, aborting.\n"); |
01f2e4ea SF |
2333 | goto err_out_dev_close; |
2334 | } | |
2335 | ||
01f2e4ea SF |
2336 | /* Setup notification timer, HW reset task, and locks |
2337 | */ | |
2338 | ||
2339 | init_timer(&enic->notify_timer); | |
2340 | enic->notify_timer.function = enic_notify_timer; | |
2341 | enic->notify_timer.data = (unsigned long)enic; | |
2342 | ||
2343 | INIT_WORK(&enic->reset, enic_reset); | |
2344 | ||
2345 | for (i = 0; i < enic->wq_count; i++) | |
2346 | spin_lock_init(&enic->wq_lock[i]); | |
2347 | ||
2348 | spin_lock_init(&enic->devcmd_lock); | |
2349 | ||
2350 | /* Register net device | |
2351 | */ | |
2352 | ||
2353 | enic->port_mtu = enic->config.mtu; | |
2354 | (void)enic_change_mtu(netdev, enic->port_mtu); | |
2355 | ||
2356 | err = enic_set_mac_addr(netdev, enic->mac_addr); | |
2357 | if (err) { | |
2358 | printk(KERN_ERR PFX | |
4b75a442 | 2359 | "Invalid MAC address, aborting.\n"); |
6fdfa970 | 2360 | goto err_out_dev_deinit; |
01f2e4ea SF |
2361 | } |
2362 | ||
7c844599 SF |
2363 | enic->tx_coalesce_usecs = enic->config.intr_timer_usec; |
2364 | enic->rx_coalesce_usecs = enic->tx_coalesce_usecs; | |
2365 | ||
f8bd9091 SF |
2366 | if (enic_is_dynamic(enic)) |
2367 | netdev->netdev_ops = &enic_netdev_dynamic_ops; | |
2368 | else | |
2369 | netdev->netdev_ops = &enic_netdev_ops; | |
2370 | ||
01f2e4ea SF |
2371 | netdev->watchdog_timeo = 2 * HZ; |
2372 | netdev->ethtool_ops = &enic_ethtool_ops; | |
01f2e4ea | 2373 | |
73c1ea9b | 2374 | netdev->features |= NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX; |
01f2e4ea SF |
2375 | if (ENIC_SETTING(enic, TXCSUM)) |
2376 | netdev->features |= NETIF_F_SG | NETIF_F_HW_CSUM; | |
2377 | if (ENIC_SETTING(enic, TSO)) | |
2378 | netdev->features |= NETIF_F_TSO | | |
2379 | NETIF_F_TSO6 | NETIF_F_TSO_ECN; | |
86ca9db7 SF |
2380 | if (ENIC_SETTING(enic, LRO)) |
2381 | netdev->features |= NETIF_F_LRO; | |
01f2e4ea SF |
2382 | if (using_dac) |
2383 | netdev->features |= NETIF_F_HIGHDMA; | |
2384 | ||
01f2e4ea SF |
2385 | enic->csum_rx_enabled = ENIC_SETTING(enic, RXCSUM); |
2386 | ||
86ca9db7 SF |
2387 | enic->lro_mgr.max_aggr = ENIC_LRO_MAX_AGGR; |
2388 | enic->lro_mgr.max_desc = ENIC_LRO_MAX_DESC; | |
2389 | enic->lro_mgr.lro_arr = enic->lro_desc; | |
2390 | enic->lro_mgr.get_skb_header = enic_get_skb_header; | |
2391 | enic->lro_mgr.features = LRO_F_NAPI | LRO_F_EXTRACT_VLAN_ID; | |
2392 | enic->lro_mgr.dev = netdev; | |
2393 | enic->lro_mgr.ip_summed = CHECKSUM_COMPLETE; | |
2394 | enic->lro_mgr.ip_summed_aggr = CHECKSUM_UNNECESSARY; | |
2395 | ||
01f2e4ea SF |
2396 | err = register_netdev(netdev); |
2397 | if (err) { | |
2398 | printk(KERN_ERR PFX | |
4b75a442 | 2399 | "Cannot register net device, aborting.\n"); |
6fdfa970 | 2400 | goto err_out_dev_deinit; |
01f2e4ea SF |
2401 | } |
2402 | ||
2403 | return 0; | |
2404 | ||
6fdfa970 SF |
2405 | err_out_dev_deinit: |
2406 | enic_dev_deinit(enic); | |
01f2e4ea SF |
2407 | err_out_dev_close: |
2408 | vnic_dev_close(enic->vdev); | |
2409 | err_out_vnic_unregister: | |
01f2e4ea SF |
2410 | vnic_dev_unregister(enic->vdev); |
2411 | err_out_iounmap: | |
2412 | enic_iounmap(enic); | |
2413 | err_out_release_regions: | |
2414 | pci_release_regions(pdev); | |
2415 | err_out_disable_device: | |
2416 | pci_disable_device(pdev); | |
2417 | err_out_free_netdev: | |
2418 | pci_set_drvdata(pdev, NULL); | |
2419 | free_netdev(netdev); | |
2420 | ||
2421 | return err; | |
2422 | } | |
2423 | ||
2424 | static void __devexit enic_remove(struct pci_dev *pdev) | |
2425 | { | |
2426 | struct net_device *netdev = pci_get_drvdata(pdev); | |
2427 | ||
2428 | if (netdev) { | |
2429 | struct enic *enic = netdev_priv(netdev); | |
2430 | ||
2431 | flush_scheduled_work(); | |
2432 | unregister_netdev(netdev); | |
6fdfa970 | 2433 | enic_dev_deinit(enic); |
01f2e4ea | 2434 | vnic_dev_close(enic->vdev); |
01f2e4ea SF |
2435 | vnic_dev_unregister(enic->vdev); |
2436 | enic_iounmap(enic); | |
2437 | pci_release_regions(pdev); | |
2438 | pci_disable_device(pdev); | |
2439 | pci_set_drvdata(pdev, NULL); | |
2440 | free_netdev(netdev); | |
2441 | } | |
2442 | } | |
2443 | ||
2444 | static struct pci_driver enic_driver = { | |
2445 | .name = DRV_NAME, | |
2446 | .id_table = enic_id_table, | |
2447 | .probe = enic_probe, | |
2448 | .remove = __devexit_p(enic_remove), | |
2449 | }; | |
2450 | ||
2451 | static int __init enic_init_module(void) | |
2452 | { | |
2453 | printk(KERN_INFO PFX "%s, ver %s\n", DRV_DESCRIPTION, DRV_VERSION); | |
2454 | ||
2455 | return pci_register_driver(&enic_driver); | |
2456 | } | |
2457 | ||
2458 | static void __exit enic_cleanup_module(void) | |
2459 | { | |
2460 | pci_unregister_driver(&enic_driver); | |
2461 | } | |
2462 | ||
2463 | module_init(enic_init_module); | |
2464 | module_exit(enic_cleanup_module); |