1 | /* |
2 | * Copyright 2008-2010 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/interrupt.h> |
27 | #include <linux/workqueue.h> |
28 | #include <linux/pci.h> |
29 | #include <linux/netdevice.h> |
30 | #include <linux/etherdevice.h> |
31 | #include <linux/if.h> |
32 | #include <linux/if_ether.h> |
33 | #include <linux/if_vlan.h> |
34 | #include <linux/in.h> |
35 | #include <linux/ip.h> |
36 | #include <linux/ipv6.h> |
37 | #include <linux/tcp.h> |
38 | #include <linux/rtnetlink.h> |
39 | #include <linux/prefetch.h> |
40 | #include <net/ip6_checksum.h> |
41 | #include <linux/ktime.h> |
42 | #include <linux/numa.h> |
43 | #ifdef CONFIG_RFS_ACCEL |
44 | #include <linux/cpu_rmap.h> |
45 | #endif |
46 | #include <linux/crash_dump.h> |
47 | #include <net/busy_poll.h> |
48 | #include <net/vxlan.h> |
49 | |
50 | #include "cq_enet_desc.h" |
51 | #include "vnic_dev.h" |
52 | #include "vnic_intr.h" |
53 | #include "vnic_stats.h" |
54 | #include "vnic_vic.h" |
55 | #include "enic_res.h" |
56 | #include "enic.h" |
57 | #include "enic_dev.h" |
58 | #include "enic_pp.h" |
59 | #include "enic_clsf.h" |
60 | |
61 | #define ENIC_NOTIFY_TIMER_PERIOD (2 * HZ) |
62 | #define WQ_ENET_MAX_DESC_LEN (1 << WQ_ENET_LEN_BITS) |
63 | #define MAX_TSO (1 << 16) |
64 | #define ENIC_DESC_MAX_SPLITS (MAX_TSO / WQ_ENET_MAX_DESC_LEN + 1) |
65 | |
66 | #define PCI_DEVICE_ID_CISCO_VIC_ENET 0x0043 /* ethernet vnic */ |
67 | #define PCI_DEVICE_ID_CISCO_VIC_ENET_DYN 0x0044 /* enet dynamic vnic */ |
68 | #define PCI_DEVICE_ID_CISCO_VIC_ENET_VF 0x0071 /* enet SRIOV VF */ |
69 | |
70 | #define RX_COPYBREAK_DEFAULT 256 |
71 | |
72 | /* Supported devices */ |
73 | static const struct pci_device_id enic_id_table[] = { |
74 | { PCI_VDEVICE(CISCO, PCI_DEVICE_ID_CISCO_VIC_ENET) }, |
75 | { PCI_VDEVICE(CISCO, PCI_DEVICE_ID_CISCO_VIC_ENET_DYN) }, |
76 | { PCI_VDEVICE(CISCO, PCI_DEVICE_ID_CISCO_VIC_ENET_VF) }, |
77 | { 0, } /* end of table */ |
78 | }; |
79 | |
80 | MODULE_DESCRIPTION(DRV_DESCRIPTION); |
81 | MODULE_AUTHOR("Scott Feldman <scofeldm@cisco.com>" ); |
82 | MODULE_LICENSE("GPL" ); |
83 | MODULE_DEVICE_TABLE(pci, enic_id_table); |
84 | |
85 | #define ENIC_LARGE_PKT_THRESHOLD 1000 |
86 | #define ENIC_MAX_COALESCE_TIMERS 10 |
87 | /* Interrupt moderation table, which will be used to decide the |
88 | * coalescing timer values |
89 | * {rx_rate in Mbps, mapping percentage of the range} |
90 | */ |
91 | static struct enic_intr_mod_table mod_table[ENIC_MAX_COALESCE_TIMERS + 1] = { |
92 | {4000, 0}, |
93 | {4400, 10}, |
94 | {5060, 20}, |
95 | {5230, 30}, |
96 | {5540, 40}, |
97 | {5820, 50}, |
98 | {6120, 60}, |
99 | {6435, 70}, |
100 | {6745, 80}, |
101 | {7000, 90}, |
102 | {0xFFFFFFFF, 100} |
103 | }; |
104 | |
105 | /* This table helps the driver to pick different ranges for rx coalescing |
106 | * timer depending on the link speed. |
107 | */ |
108 | static struct enic_intr_mod_range mod_range[ENIC_MAX_LINK_SPEEDS] = { |
109 | {0, 0}, /* 0 - 4 Gbps */ |
110 | {0, 3}, /* 4 - 10 Gbps */ |
111 | {3, 6}, /* 10 - 40 Gbps */ |
112 | }; |
113 | |
114 | static void enic_init_affinity_hint(struct enic *enic) |
115 | { |
116 | int numa_node = dev_to_node(dev: &enic->pdev->dev); |
117 | int i; |
118 | |
119 | for (i = 0; i < enic->intr_count; i++) { |
120 | if (enic_is_err_intr(enic, intr: i) || enic_is_notify_intr(enic, intr: i) || |
121 | (cpumask_available(mask: enic->msix[i].affinity_mask) && |
122 | !cpumask_empty(srcp: enic->msix[i].affinity_mask))) |
123 | continue; |
124 | if (zalloc_cpumask_var(mask: &enic->msix[i].affinity_mask, |
125 | GFP_KERNEL)) |
126 | cpumask_set_cpu(cpu: cpumask_local_spread(i, node: numa_node), |
127 | dstp: enic->msix[i].affinity_mask); |
128 | } |
129 | } |
130 | |
131 | static void enic_free_affinity_hint(struct enic *enic) |
132 | { |
133 | int i; |
134 | |
135 | for (i = 0; i < enic->intr_count; i++) { |
136 | if (enic_is_err_intr(enic, intr: i) || enic_is_notify_intr(enic, intr: i)) |
137 | continue; |
138 | free_cpumask_var(mask: enic->msix[i].affinity_mask); |
139 | } |
140 | } |
141 | |
142 | static void enic_set_affinity_hint(struct enic *enic) |
143 | { |
144 | int i; |
145 | int err; |
146 | |
147 | for (i = 0; i < enic->intr_count; i++) { |
148 | if (enic_is_err_intr(enic, intr: i) || |
149 | enic_is_notify_intr(enic, intr: i) || |
150 | !cpumask_available(mask: enic->msix[i].affinity_mask) || |
151 | cpumask_empty(srcp: enic->msix[i].affinity_mask)) |
152 | continue; |
153 | err = irq_update_affinity_hint(irq: enic->msix_entry[i].vector, |
154 | m: enic->msix[i].affinity_mask); |
155 | if (err) |
156 | netdev_warn(dev: enic->netdev, format: "irq_update_affinity_hint failed, err %d\n" , |
157 | err); |
158 | } |
159 | |
160 | for (i = 0; i < enic->wq_count; i++) { |
161 | int wq_intr = enic_msix_wq_intr(enic, wq: i); |
162 | |
163 | if (cpumask_available(mask: enic->msix[wq_intr].affinity_mask) && |
164 | !cpumask_empty(srcp: enic->msix[wq_intr].affinity_mask)) |
165 | netif_set_xps_queue(dev: enic->netdev, |
166 | mask: enic->msix[wq_intr].affinity_mask, |
167 | index: i); |
168 | } |
169 | } |
170 | |
171 | static void enic_unset_affinity_hint(struct enic *enic) |
172 | { |
173 | int i; |
174 | |
175 | for (i = 0; i < enic->intr_count; i++) |
176 | irq_update_affinity_hint(irq: enic->msix_entry[i].vector, NULL); |
177 | } |
178 | |
179 | static int enic_udp_tunnel_set_port(struct net_device *netdev, |
180 | unsigned int table, unsigned int entry, |
181 | struct udp_tunnel_info *ti) |
182 | { |
183 | struct enic *enic = netdev_priv(dev: netdev); |
184 | int err; |
185 | |
186 | spin_lock_bh(lock: &enic->devcmd_lock); |
187 | |
188 | err = vnic_dev_overlay_offload_cfg(vdev: enic->vdev, |
189 | OVERLAY_CFG_VXLAN_PORT_UPDATE, |
190 | ntohs(ti->port)); |
191 | if (err) |
192 | goto error; |
193 | |
194 | err = vnic_dev_overlay_offload_ctrl(vdev: enic->vdev, overlay: OVERLAY_FEATURE_VXLAN, |
195 | config: enic->vxlan.patch_level); |
196 | if (err) |
197 | goto error; |
198 | |
199 | enic->vxlan.vxlan_udp_port_number = ntohs(ti->port); |
200 | error: |
201 | spin_unlock_bh(lock: &enic->devcmd_lock); |
202 | |
203 | return err; |
204 | } |
205 | |
206 | static int enic_udp_tunnel_unset_port(struct net_device *netdev, |
207 | unsigned int table, unsigned int entry, |
208 | struct udp_tunnel_info *ti) |
209 | { |
210 | struct enic *enic = netdev_priv(dev: netdev); |
211 | int err; |
212 | |
213 | spin_lock_bh(lock: &enic->devcmd_lock); |
214 | |
215 | err = vnic_dev_overlay_offload_ctrl(vdev: enic->vdev, overlay: OVERLAY_FEATURE_VXLAN, |
216 | config: OVERLAY_OFFLOAD_DISABLE); |
217 | if (err) |
218 | goto unlock; |
219 | |
220 | enic->vxlan.vxlan_udp_port_number = 0; |
221 | |
222 | unlock: |
223 | spin_unlock_bh(lock: &enic->devcmd_lock); |
224 | |
225 | return err; |
226 | } |
227 | |
228 | static const struct udp_tunnel_nic_info enic_udp_tunnels = { |
229 | .set_port = enic_udp_tunnel_set_port, |
230 | .unset_port = enic_udp_tunnel_unset_port, |
231 | .tables = { |
232 | { .n_entries = 1, .tunnel_types = UDP_TUNNEL_TYPE_VXLAN, }, |
233 | }, |
234 | }, enic_udp_tunnels_v4 = { |
235 | .set_port = enic_udp_tunnel_set_port, |
236 | .unset_port = enic_udp_tunnel_unset_port, |
237 | .flags = UDP_TUNNEL_NIC_INFO_IPV4_ONLY, |
238 | .tables = { |
239 | { .n_entries = 1, .tunnel_types = UDP_TUNNEL_TYPE_VXLAN, }, |
240 | }, |
241 | }; |
242 | |
243 | static netdev_features_t enic_features_check(struct sk_buff *skb, |
244 | struct net_device *dev, |
245 | netdev_features_t features) |
246 | { |
247 | const struct ethhdr *eth = (struct ethhdr *)skb_inner_mac_header(skb); |
248 | struct enic *enic = netdev_priv(dev); |
249 | struct udphdr *udph; |
250 | u16 port = 0; |
251 | u8 proto; |
252 | |
253 | if (!skb->encapsulation) |
254 | return features; |
255 | |
256 | features = vxlan_features_check(skb, features); |
257 | |
258 | switch (vlan_get_protocol(skb)) { |
259 | case htons(ETH_P_IPV6): |
260 | if (!(enic->vxlan.flags & ENIC_VXLAN_OUTER_IPV6)) |
261 | goto out; |
262 | proto = ipv6_hdr(skb)->nexthdr; |
263 | break; |
264 | case htons(ETH_P_IP): |
265 | proto = ip_hdr(skb)->protocol; |
266 | break; |
267 | default: |
268 | goto out; |
269 | } |
270 | |
271 | switch (eth->h_proto) { |
272 | case ntohs(ETH_P_IPV6): |
273 | if (!(enic->vxlan.flags & ENIC_VXLAN_INNER_IPV6)) |
274 | goto out; |
275 | fallthrough; |
276 | case ntohs(ETH_P_IP): |
277 | break; |
278 | default: |
279 | goto out; |
280 | } |
281 | |
282 | |
283 | if (proto == IPPROTO_UDP) { |
284 | udph = udp_hdr(skb); |
285 | port = be16_to_cpu(udph->dest); |
286 | } |
287 | |
288 | /* HW supports offload of only one UDP port. Remove CSUM and GSO MASK |
289 | * for other UDP port tunnels |
290 | */ |
291 | if (port != enic->vxlan.vxlan_udp_port_number) |
292 | goto out; |
293 | |
294 | return features; |
295 | |
296 | out: |
297 | return features & ~(NETIF_F_CSUM_MASK | NETIF_F_GSO_MASK); |
298 | } |
299 | |
300 | int enic_is_dynamic(struct enic *enic) |
301 | { |
302 | return enic->pdev->device == PCI_DEVICE_ID_CISCO_VIC_ENET_DYN; |
303 | } |
304 | |
305 | int enic_sriov_enabled(struct enic *enic) |
306 | { |
307 | return (enic->priv_flags & ENIC_SRIOV_ENABLED) ? 1 : 0; |
308 | } |
309 | |
310 | static int enic_is_sriov_vf(struct enic *enic) |
311 | { |
312 | return enic->pdev->device == PCI_DEVICE_ID_CISCO_VIC_ENET_VF; |
313 | } |
314 | |
315 | int enic_is_valid_vf(struct enic *enic, int vf) |
316 | { |
317 | #ifdef CONFIG_PCI_IOV |
318 | return vf >= 0 && vf < enic->num_vfs; |
319 | #else |
320 | return 0; |
321 | #endif |
322 | } |
323 | |
324 | static void enic_free_wq_buf(struct vnic_wq *wq, struct vnic_wq_buf *buf) |
325 | { |
326 | struct enic *enic = vnic_dev_priv(vdev: wq->vdev); |
327 | |
328 | if (buf->sop) |
329 | dma_unmap_single(&enic->pdev->dev, buf->dma_addr, buf->len, |
330 | DMA_TO_DEVICE); |
331 | else |
332 | dma_unmap_page(&enic->pdev->dev, buf->dma_addr, buf->len, |
333 | DMA_TO_DEVICE); |
334 | |
335 | if (buf->os_buf) |
336 | dev_kfree_skb_any(skb: buf->os_buf); |
337 | } |
338 | |
339 | static void enic_wq_free_buf(struct vnic_wq *wq, |
340 | struct cq_desc *cq_desc, struct vnic_wq_buf *buf, void *opaque) |
341 | { |
342 | enic_free_wq_buf(wq, buf); |
343 | } |
344 | |
345 | static int enic_wq_service(struct vnic_dev *vdev, struct cq_desc *cq_desc, |
346 | u8 type, u16 q_number, u16 completed_index, void *opaque) |
347 | { |
348 | struct enic *enic = vnic_dev_priv(vdev); |
349 | |
350 | spin_lock(lock: &enic->wq_lock[q_number]); |
351 | |
352 | vnic_wq_service(wq: &enic->wq[q_number], cq_desc, |
353 | completed_index, buf_service: enic_wq_free_buf, |
354 | opaque); |
355 | |
356 | if (netif_tx_queue_stopped(dev_queue: netdev_get_tx_queue(dev: enic->netdev, index: q_number)) && |
357 | vnic_wq_desc_avail(wq: &enic->wq[q_number]) >= |
358 | (MAX_SKB_FRAGS + ENIC_DESC_MAX_SPLITS)) |
359 | netif_wake_subqueue(dev: enic->netdev, queue_index: q_number); |
360 | |
361 | spin_unlock(lock: &enic->wq_lock[q_number]); |
362 | |
363 | return 0; |
364 | } |
365 | |
366 | static bool enic_log_q_error(struct enic *enic) |
367 | { |
368 | unsigned int i; |
369 | u32 error_status; |
370 | bool err = false; |
371 | |
372 | for (i = 0; i < enic->wq_count; i++) { |
373 | error_status = vnic_wq_error_status(wq: &enic->wq[i]); |
374 | err |= error_status; |
375 | if (error_status) |
376 | netdev_err(dev: enic->netdev, format: "WQ[%d] error_status %d\n" , |
377 | i, error_status); |
378 | } |
379 | |
380 | for (i = 0; i < enic->rq_count; i++) { |
381 | error_status = vnic_rq_error_status(rq: &enic->rq[i]); |
382 | err |= error_status; |
383 | if (error_status) |
384 | netdev_err(dev: enic->netdev, format: "RQ[%d] error_status %d\n" , |
385 | i, error_status); |
386 | } |
387 | |
388 | return err; |
389 | } |
390 | |
391 | static void enic_msglvl_check(struct enic *enic) |
392 | { |
393 | u32 msg_enable = vnic_dev_msg_lvl(vdev: enic->vdev); |
394 | |
395 | if (msg_enable != enic->msg_enable) { |
396 | netdev_info(dev: enic->netdev, format: "msg lvl changed from 0x%x to 0x%x\n" , |
397 | enic->msg_enable, msg_enable); |
398 | enic->msg_enable = msg_enable; |
399 | } |
400 | } |
401 | |
402 | static void enic_mtu_check(struct enic *enic) |
403 | { |
404 | u32 mtu = vnic_dev_mtu(vdev: enic->vdev); |
405 | struct net_device *netdev = enic->netdev; |
406 | |
407 | if (mtu && mtu != enic->port_mtu) { |
408 | enic->port_mtu = mtu; |
409 | if (enic_is_dynamic(enic) || enic_is_sriov_vf(enic)) { |
410 | mtu = max_t(int, ENIC_MIN_MTU, |
411 | min_t(int, ENIC_MAX_MTU, mtu)); |
412 | if (mtu != netdev->mtu) |
413 | schedule_work(work: &enic->change_mtu_work); |
414 | } else { |
415 | if (mtu < netdev->mtu) |
416 | netdev_warn(dev: netdev, |
417 | format: "interface MTU (%d) set higher " |
418 | "than switch port MTU (%d)\n" , |
419 | netdev->mtu, mtu); |
420 | } |
421 | } |
422 | } |
423 | |
424 | static void enic_link_check(struct enic *enic) |
425 | { |
426 | int link_status = vnic_dev_link_status(vdev: enic->vdev); |
427 | int carrier_ok = netif_carrier_ok(dev: enic->netdev); |
428 | |
429 | if (link_status && !carrier_ok) { |
430 | netdev_info(dev: enic->netdev, format: "Link UP\n" ); |
431 | netif_carrier_on(dev: enic->netdev); |
432 | } else if (!link_status && carrier_ok) { |
433 | netdev_info(dev: enic->netdev, format: "Link DOWN\n" ); |
434 | netif_carrier_off(dev: enic->netdev); |
435 | } |
436 | } |
437 | |
438 | static void enic_notify_check(struct enic *enic) |
439 | { |
440 | enic_msglvl_check(enic); |
441 | enic_mtu_check(enic); |
442 | enic_link_check(enic); |
443 | } |
444 | |
445 | #define ENIC_TEST_INTR(pba, i) (pba & (1 << i)) |
446 | |
447 | static irqreturn_t enic_isr_legacy(int irq, void *data) |
448 | { |
449 | struct net_device *netdev = data; |
450 | struct enic *enic = netdev_priv(dev: netdev); |
451 | unsigned int io_intr = ENIC_LEGACY_IO_INTR; |
452 | unsigned int err_intr = ENIC_LEGACY_ERR_INTR; |
453 | unsigned int notify_intr = ENIC_LEGACY_NOTIFY_INTR; |
454 | u32 pba; |
455 | |
456 | vnic_intr_mask(intr: &enic->intr[io_intr]); |
457 | |
458 | pba = vnic_intr_legacy_pba(legacy_pba: enic->legacy_pba); |
459 | if (!pba) { |
460 | vnic_intr_unmask(intr: &enic->intr[io_intr]); |
461 | return IRQ_NONE; /* not our interrupt */ |
462 | } |
463 | |
464 | if (ENIC_TEST_INTR(pba, notify_intr)) { |
465 | enic_notify_check(enic); |
466 | vnic_intr_return_all_credits(intr: &enic->intr[notify_intr]); |
467 | } |
468 | |
469 | if (ENIC_TEST_INTR(pba, err_intr)) { |
470 | vnic_intr_return_all_credits(intr: &enic->intr[err_intr]); |
471 | enic_log_q_error(enic); |
472 | /* schedule recovery from WQ/RQ error */ |
473 | schedule_work(work: &enic->reset); |
474 | return IRQ_HANDLED; |
475 | } |
476 | |
477 | if (ENIC_TEST_INTR(pba, io_intr)) |
478 | napi_schedule_irqoff(n: &enic->napi[0]); |
479 | else |
480 | vnic_intr_unmask(intr: &enic->intr[io_intr]); |
481 | |
482 | return IRQ_HANDLED; |
483 | } |
484 | |
485 | static irqreturn_t enic_isr_msi(int irq, void *data) |
486 | { |
487 | struct enic *enic = data; |
488 | |
489 | /* With MSI, there is no sharing of interrupts, so this is |
490 | * our interrupt and there is no need to ack it. The device |
491 | * is not providing per-vector masking, so the OS will not |
492 | * write to PCI config space to mask/unmask the interrupt. |
493 | * We're using mask_on_assertion for MSI, so the device |
494 | * automatically masks the interrupt when the interrupt is |
495 | * generated. Later, when exiting polling, the interrupt |
496 | * will be unmasked (see enic_poll). |
497 | * |
498 | * Also, the device uses the same PCIe Traffic Class (TC) |
499 | * for Memory Write data and MSI, so there are no ordering |
500 | * issues; the MSI will always arrive at the Root Complex |
501 | * _after_ corresponding Memory Writes (i.e. descriptor |
502 | * writes). |
503 | */ |
504 | |
505 | napi_schedule_irqoff(n: &enic->napi[0]); |
506 | |
507 | return IRQ_HANDLED; |
508 | } |
509 | |
510 | static irqreturn_t enic_isr_msix(int irq, void *data) |
511 | { |
512 | struct napi_struct *napi = data; |
513 | |
514 | napi_schedule_irqoff(n: napi); |
515 | |
516 | return IRQ_HANDLED; |
517 | } |
518 | |
519 | static irqreturn_t enic_isr_msix_err(int irq, void *data) |
520 | { |
521 | struct enic *enic = data; |
522 | unsigned int intr = enic_msix_err_intr(enic); |
523 | |
524 | vnic_intr_return_all_credits(intr: &enic->intr[intr]); |
525 | |
526 | if (enic_log_q_error(enic)) |
527 | /* schedule recovery from WQ/RQ error */ |
528 | schedule_work(work: &enic->reset); |
529 | |
530 | return IRQ_HANDLED; |
531 | } |
532 | |
533 | static irqreturn_t enic_isr_msix_notify(int irq, void *data) |
534 | { |
535 | struct enic *enic = data; |
536 | unsigned int intr = enic_msix_notify_intr(enic); |
537 | |
538 | enic_notify_check(enic); |
539 | vnic_intr_return_all_credits(intr: &enic->intr[intr]); |
540 | |
541 | return IRQ_HANDLED; |
542 | } |
543 | |
544 | static int enic_queue_wq_skb_cont(struct enic *enic, struct vnic_wq *wq, |
545 | struct sk_buff *skb, unsigned int len_left, |
546 | int loopback) |
547 | { |
548 | const skb_frag_t *frag; |
549 | dma_addr_t dma_addr; |
550 | |
551 | /* Queue additional data fragments */ |
552 | for (frag = skb_shinfo(skb)->frags; len_left; frag++) { |
553 | len_left -= skb_frag_size(frag); |
554 | dma_addr = skb_frag_dma_map(dev: &enic->pdev->dev, frag, offset: 0, |
555 | size: skb_frag_size(frag), |
556 | dir: DMA_TO_DEVICE); |
557 | if (unlikely(enic_dma_map_check(enic, dma_addr))) |
558 | return -ENOMEM; |
559 | enic_queue_wq_desc_cont(wq, os_buf: skb, dma_addr, len: skb_frag_size(frag), |
560 | eop: (len_left == 0), /* EOP? */ |
561 | loopback); |
562 | } |
563 | |
564 | return 0; |
565 | } |
566 | |
567 | static int enic_queue_wq_skb_vlan(struct enic *enic, struct vnic_wq *wq, |
568 | struct sk_buff *skb, int vlan_tag_insert, |
569 | unsigned int vlan_tag, int loopback) |
570 | { |
571 | unsigned int head_len = skb_headlen(skb); |
572 | unsigned int len_left = skb->len - head_len; |
573 | int eop = (len_left == 0); |
574 | dma_addr_t dma_addr; |
575 | int err = 0; |
576 | |
577 | dma_addr = dma_map_single(&enic->pdev->dev, skb->data, head_len, |
578 | DMA_TO_DEVICE); |
579 | if (unlikely(enic_dma_map_check(enic, dma_addr))) |
580 | return -ENOMEM; |
581 | |
582 | /* Queue the main skb fragment. The fragments are no larger |
583 | * than max MTU(9000)+ETH_HDR_LEN(14) bytes, which is less |
584 | * than WQ_ENET_MAX_DESC_LEN length. So only one descriptor |
585 | * per fragment is queued. |
586 | */ |
587 | enic_queue_wq_desc(wq, os_buf: skb, dma_addr, len: head_len, vlan_tag_insert, |
588 | vlan_tag, eop, loopback); |
589 | |
590 | if (!eop) |
591 | err = enic_queue_wq_skb_cont(enic, wq, skb, len_left, loopback); |
592 | |
593 | return err; |
594 | } |
595 | |
596 | static int enic_queue_wq_skb_csum_l4(struct enic *enic, struct vnic_wq *wq, |
597 | struct sk_buff *skb, int vlan_tag_insert, |
598 | unsigned int vlan_tag, int loopback) |
599 | { |
600 | unsigned int head_len = skb_headlen(skb); |
601 | unsigned int len_left = skb->len - head_len; |
602 | unsigned int hdr_len = skb_checksum_start_offset(skb); |
603 | unsigned int csum_offset = hdr_len + skb->csum_offset; |
604 | int eop = (len_left == 0); |
605 | dma_addr_t dma_addr; |
606 | int err = 0; |
607 | |
608 | dma_addr = dma_map_single(&enic->pdev->dev, skb->data, head_len, |
609 | DMA_TO_DEVICE); |
610 | if (unlikely(enic_dma_map_check(enic, dma_addr))) |
611 | return -ENOMEM; |
612 | |
613 | /* Queue the main skb fragment. The fragments are no larger |
614 | * than max MTU(9000)+ETH_HDR_LEN(14) bytes, which is less |
615 | * than WQ_ENET_MAX_DESC_LEN length. So only one descriptor |
616 | * per fragment is queued. |
617 | */ |
618 | enic_queue_wq_desc_csum_l4(wq, os_buf: skb, dma_addr, len: head_len, csum_offset, |
619 | hdr_len, vlan_tag_insert, vlan_tag, eop, |
620 | loopback); |
621 | |
622 | if (!eop) |
623 | err = enic_queue_wq_skb_cont(enic, wq, skb, len_left, loopback); |
624 | |
625 | return err; |
626 | } |
627 | |
628 | static void enic_preload_tcp_csum_encap(struct sk_buff *skb) |
629 | { |
630 | const struct ethhdr *eth = (struct ethhdr *)skb_inner_mac_header(skb); |
631 | |
632 | switch (eth->h_proto) { |
633 | case ntohs(ETH_P_IP): |
634 | inner_ip_hdr(skb)->check = 0; |
635 | inner_tcp_hdr(skb)->check = |
636 | ~csum_tcpudp_magic(saddr: inner_ip_hdr(skb)->saddr, |
637 | daddr: inner_ip_hdr(skb)->daddr, len: 0, |
638 | IPPROTO_TCP, sum: 0); |
639 | break; |
640 | case ntohs(ETH_P_IPV6): |
641 | inner_tcp_hdr(skb)->check = |
642 | ~csum_ipv6_magic(saddr: &inner_ipv6_hdr(skb)->saddr, |
643 | daddr: &inner_ipv6_hdr(skb)->daddr, len: 0, |
644 | IPPROTO_TCP, sum: 0); |
645 | break; |
646 | default: |
647 | WARN_ONCE(1, "Non ipv4/ipv6 inner pkt for encap offload" ); |
648 | break; |
649 | } |
650 | } |
651 | |
652 | static void enic_preload_tcp_csum(struct sk_buff *skb) |
653 | { |
654 | /* Preload TCP csum field with IP pseudo hdr calculated |
655 | * with IP length set to zero. HW will later add in length |
656 | * to each TCP segment resulting from the TSO. |
657 | */ |
658 | |
659 | if (skb->protocol == cpu_to_be16(ETH_P_IP)) { |
660 | ip_hdr(skb)->check = 0; |
661 | tcp_hdr(skb)->check = ~csum_tcpudp_magic(saddr: ip_hdr(skb)->saddr, |
662 | daddr: ip_hdr(skb)->daddr, len: 0, IPPROTO_TCP, sum: 0); |
663 | } else if (skb->protocol == cpu_to_be16(ETH_P_IPV6)) { |
664 | tcp_v6_gso_csum_prep(skb); |
665 | } |
666 | } |
667 | |
668 | static int enic_queue_wq_skb_tso(struct enic *enic, struct vnic_wq *wq, |
669 | struct sk_buff *skb, unsigned int mss, |
670 | int vlan_tag_insert, unsigned int vlan_tag, |
671 | int loopback) |
672 | { |
673 | unsigned int frag_len_left = skb_headlen(skb); |
674 | unsigned int len_left = skb->len - frag_len_left; |
675 | int eop = (len_left == 0); |
676 | unsigned int offset = 0; |
677 | unsigned int hdr_len; |
678 | dma_addr_t dma_addr; |
679 | unsigned int len; |
680 | skb_frag_t *frag; |
681 | |
682 | if (skb->encapsulation) { |
683 | hdr_len = skb_inner_tcp_all_headers(skb); |
684 | enic_preload_tcp_csum_encap(skb); |
685 | } else { |
686 | hdr_len = skb_tcp_all_headers(skb); |
687 | enic_preload_tcp_csum(skb); |
688 | } |
689 | |
690 | /* Queue WQ_ENET_MAX_DESC_LEN length descriptors |
691 | * for the main skb fragment |
692 | */ |
693 | while (frag_len_left) { |
694 | len = min(frag_len_left, (unsigned int)WQ_ENET_MAX_DESC_LEN); |
695 | dma_addr = dma_map_single(&enic->pdev->dev, |
696 | skb->data + offset, len, |
697 | DMA_TO_DEVICE); |
698 | if (unlikely(enic_dma_map_check(enic, dma_addr))) |
699 | return -ENOMEM; |
700 | enic_queue_wq_desc_tso(wq, os_buf: skb, dma_addr, len, mss, hdr_len, |
701 | vlan_tag_insert, vlan_tag, |
702 | eop: eop && (len == frag_len_left), loopback); |
703 | frag_len_left -= len; |
704 | offset += len; |
705 | } |
706 | |
707 | if (eop) |
708 | return 0; |
709 | |
710 | /* Queue WQ_ENET_MAX_DESC_LEN length descriptors |
711 | * for additional data fragments |
712 | */ |
713 | for (frag = skb_shinfo(skb)->frags; len_left; frag++) { |
714 | len_left -= skb_frag_size(frag); |
715 | frag_len_left = skb_frag_size(frag); |
716 | offset = 0; |
717 | |
718 | while (frag_len_left) { |
719 | len = min(frag_len_left, |
720 | (unsigned int)WQ_ENET_MAX_DESC_LEN); |
721 | dma_addr = skb_frag_dma_map(dev: &enic->pdev->dev, frag, |
722 | offset, size: len, |
723 | dir: DMA_TO_DEVICE); |
724 | if (unlikely(enic_dma_map_check(enic, dma_addr))) |
725 | return -ENOMEM; |
726 | enic_queue_wq_desc_cont(wq, os_buf: skb, dma_addr, len, |
727 | eop: (len_left == 0) && |
728 | (len == frag_len_left),/*EOP*/ |
729 | loopback); |
730 | frag_len_left -= len; |
731 | offset += len; |
732 | } |
733 | } |
734 | |
735 | return 0; |
736 | } |
737 | |
738 | static inline int enic_queue_wq_skb_encap(struct enic *enic, struct vnic_wq *wq, |
739 | struct sk_buff *skb, |
740 | int vlan_tag_insert, |
741 | unsigned int vlan_tag, int loopback) |
742 | { |
743 | unsigned int head_len = skb_headlen(skb); |
744 | unsigned int len_left = skb->len - head_len; |
745 | /* Hardware will overwrite the checksum fields, calculating from |
746 | * scratch and ignoring the value placed by software. |
747 | * Offload mode = 00 |
748 | * mss[2], mss[1], mss[0] bits are set |
749 | */ |
750 | unsigned int mss_or_csum = 7; |
751 | int eop = (len_left == 0); |
752 | dma_addr_t dma_addr; |
753 | int err = 0; |
754 | |
755 | dma_addr = dma_map_single(&enic->pdev->dev, skb->data, head_len, |
756 | DMA_TO_DEVICE); |
757 | if (unlikely(enic_dma_map_check(enic, dma_addr))) |
758 | return -ENOMEM; |
759 | |
760 | enic_queue_wq_desc_ex(wq, os_buf: skb, dma_addr, len: head_len, mss_or_csum_offset: mss_or_csum, hdr_len: 0, |
761 | vlan_tag_insert, vlan_tag, |
762 | WQ_ENET_OFFLOAD_MODE_CSUM, cq_entry: eop, sop: 1 /* SOP */, eop, |
763 | loopback); |
764 | if (!eop) |
765 | err = enic_queue_wq_skb_cont(enic, wq, skb, len_left, loopback); |
766 | |
767 | return err; |
768 | } |
769 | |
770 | static inline int enic_queue_wq_skb(struct enic *enic, |
771 | struct vnic_wq *wq, struct sk_buff *skb) |
772 | { |
773 | unsigned int mss = skb_shinfo(skb)->gso_size; |
774 | unsigned int vlan_tag = 0; |
775 | int vlan_tag_insert = 0; |
776 | int loopback = 0; |
777 | int err; |
778 | |
779 | if (skb_vlan_tag_present(skb)) { |
780 | /* VLAN tag from trunking driver */ |
781 | vlan_tag_insert = 1; |
782 | vlan_tag = skb_vlan_tag_get(skb); |
783 | } else if (enic->loop_enable) { |
784 | vlan_tag = enic->loop_tag; |
785 | loopback = 1; |
786 | } |
787 | |
788 | if (mss) |
789 | err = enic_queue_wq_skb_tso(enic, wq, skb, mss, |
790 | vlan_tag_insert, vlan_tag, |
791 | loopback); |
792 | else if (skb->encapsulation) |
793 | err = enic_queue_wq_skb_encap(enic, wq, skb, vlan_tag_insert, |
794 | vlan_tag, loopback); |
795 | else if (skb->ip_summed == CHECKSUM_PARTIAL) |
796 | err = enic_queue_wq_skb_csum_l4(enic, wq, skb, vlan_tag_insert, |
797 | vlan_tag, loopback); |
798 | else |
799 | err = enic_queue_wq_skb_vlan(enic, wq, skb, vlan_tag_insert, |
800 | vlan_tag, loopback); |
801 | if (unlikely(err)) { |
802 | struct vnic_wq_buf *buf; |
803 | |
804 | buf = wq->to_use->prev; |
805 | /* while not EOP of previous pkt && queue not empty. |
806 | * For all non EOP bufs, os_buf is NULL. |
807 | */ |
808 | while (!buf->os_buf && (buf->next != wq->to_clean)) { |
809 | enic_free_wq_buf(wq, buf); |
810 | wq->ring.desc_avail++; |
811 | buf = buf->prev; |
812 | } |
813 | wq->to_use = buf->next; |
814 | dev_kfree_skb(skb); |
815 | } |
816 | return err; |
817 | } |
818 | |
819 | /* netif_tx_lock held, process context with BHs disabled, or BH */ |
820 | static netdev_tx_t enic_hard_start_xmit(struct sk_buff *skb, |
821 | struct net_device *netdev) |
822 | { |
823 | struct enic *enic = netdev_priv(dev: netdev); |
824 | struct vnic_wq *wq; |
825 | unsigned int txq_map; |
826 | struct netdev_queue *txq; |
827 | |
828 | if (skb->len <= 0) { |
829 | dev_kfree_skb_any(skb); |
830 | return NETDEV_TX_OK; |
831 | } |
832 | |
833 | txq_map = skb_get_queue_mapping(skb) % enic->wq_count; |
834 | wq = &enic->wq[txq_map]; |
835 | txq = netdev_get_tx_queue(dev: netdev, index: txq_map); |
836 | |
837 | /* Non-TSO sends must fit within ENIC_NON_TSO_MAX_DESC descs, |
838 | * which is very likely. In the off chance it's going to take |
839 | * more than * ENIC_NON_TSO_MAX_DESC, linearize the skb. |
840 | */ |
841 | |
842 | if (skb_shinfo(skb)->gso_size == 0 && |
843 | skb_shinfo(skb)->nr_frags + 1 > ENIC_NON_TSO_MAX_DESC && |
844 | skb_linearize(skb)) { |
845 | dev_kfree_skb_any(skb); |
846 | return NETDEV_TX_OK; |
847 | } |
848 | |
849 | spin_lock(lock: &enic->wq_lock[txq_map]); |
850 | |
851 | if (vnic_wq_desc_avail(wq) < |
852 | skb_shinfo(skb)->nr_frags + ENIC_DESC_MAX_SPLITS) { |
853 | netif_tx_stop_queue(dev_queue: txq); |
854 | /* This is a hard error, log it */ |
855 | netdev_err(dev: netdev, format: "BUG! Tx ring full when queue awake!\n" ); |
856 | spin_unlock(lock: &enic->wq_lock[txq_map]); |
857 | return NETDEV_TX_BUSY; |
858 | } |
859 | |
860 | if (enic_queue_wq_skb(enic, wq, skb)) |
861 | goto error; |
862 | |
863 | if (vnic_wq_desc_avail(wq) < MAX_SKB_FRAGS + ENIC_DESC_MAX_SPLITS) |
864 | netif_tx_stop_queue(dev_queue: txq); |
865 | skb_tx_timestamp(skb); |
866 | if (!netdev_xmit_more() || netif_xmit_stopped(dev_queue: txq)) |
867 | vnic_wq_doorbell(wq); |
868 | |
869 | error: |
870 | spin_unlock(lock: &enic->wq_lock[txq_map]); |
871 | |
872 | return NETDEV_TX_OK; |
873 | } |
874 | |
875 | /* rcu_read_lock potentially held, nominally process context */ |
876 | static void enic_get_stats(struct net_device *netdev, |
877 | struct rtnl_link_stats64 *net_stats) |
878 | { |
879 | struct enic *enic = netdev_priv(dev: netdev); |
880 | struct vnic_stats *stats; |
881 | int err; |
882 | |
883 | err = enic_dev_stats_dump(enic, vstats: &stats); |
884 | /* return only when dma_alloc_coherent fails in vnic_dev_stats_dump |
885 | * For other failures, like devcmd failure, we return previously |
886 | * recorded stats. |
887 | */ |
888 | if (err == -ENOMEM) |
889 | return; |
890 | |
891 | net_stats->tx_packets = stats->tx.tx_frames_ok; |
892 | net_stats->tx_bytes = stats->tx.tx_bytes_ok; |
893 | net_stats->tx_errors = stats->tx.tx_errors; |
894 | net_stats->tx_dropped = stats->tx.tx_drops; |
895 | |
896 | net_stats->rx_packets = stats->rx.rx_frames_ok; |
897 | net_stats->rx_bytes = stats->rx.rx_bytes_ok; |
898 | net_stats->rx_errors = stats->rx.rx_errors; |
899 | net_stats->multicast = stats->rx.rx_multicast_frames_ok; |
900 | net_stats->rx_over_errors = enic->rq_truncated_pkts; |
901 | net_stats->rx_crc_errors = enic->rq_bad_fcs; |
902 | net_stats->rx_dropped = stats->rx.rx_no_bufs + stats->rx.rx_drop; |
903 | } |
904 | |
905 | static int enic_mc_sync(struct net_device *netdev, const u8 *mc_addr) |
906 | { |
907 | struct enic *enic = netdev_priv(dev: netdev); |
908 | |
909 | if (enic->mc_count == ENIC_MULTICAST_PERFECT_FILTERS) { |
910 | unsigned int mc_count = netdev_mc_count(netdev); |
911 | |
912 | netdev_warn(dev: netdev, format: "Registering only %d out of %d multicast addresses\n" , |
913 | ENIC_MULTICAST_PERFECT_FILTERS, mc_count); |
914 | |
915 | return -ENOSPC; |
916 | } |
917 | |
918 | enic_dev_add_addr(enic, addr: mc_addr); |
919 | enic->mc_count++; |
920 | |
921 | return 0; |
922 | } |
923 | |
924 | static int enic_mc_unsync(struct net_device *netdev, const u8 *mc_addr) |
925 | { |
926 | struct enic *enic = netdev_priv(dev: netdev); |
927 | |
928 | enic_dev_del_addr(enic, addr: mc_addr); |
929 | enic->mc_count--; |
930 | |
931 | return 0; |
932 | } |
933 | |
934 | static int enic_uc_sync(struct net_device *netdev, const u8 *uc_addr) |
935 | { |
936 | struct enic *enic = netdev_priv(dev: netdev); |
937 | |
938 | if (enic->uc_count == ENIC_UNICAST_PERFECT_FILTERS) { |
939 | unsigned int uc_count = netdev_uc_count(netdev); |
940 | |
941 | netdev_warn(dev: netdev, format: "Registering only %d out of %d unicast addresses\n" , |
942 | ENIC_UNICAST_PERFECT_FILTERS, uc_count); |
943 | |
944 | return -ENOSPC; |
945 | } |
946 | |
947 | enic_dev_add_addr(enic, addr: uc_addr); |
948 | enic->uc_count++; |
949 | |
950 | return 0; |
951 | } |
952 | |
953 | static int enic_uc_unsync(struct net_device *netdev, const u8 *uc_addr) |
954 | { |
955 | struct enic *enic = netdev_priv(dev: netdev); |
956 | |
957 | enic_dev_del_addr(enic, addr: uc_addr); |
958 | enic->uc_count--; |
959 | |
960 | return 0; |
961 | } |
962 | |
963 | void enic_reset_addr_lists(struct enic *enic) |
964 | { |
965 | struct net_device *netdev = enic->netdev; |
966 | |
967 | __dev_uc_unsync(dev: netdev, NULL); |
968 | __dev_mc_unsync(dev: netdev, NULL); |
969 | |
970 | enic->mc_count = 0; |
971 | enic->uc_count = 0; |
972 | enic->flags = 0; |
973 | } |
974 | |
975 | static int enic_set_mac_addr(struct net_device *netdev, char *addr) |
976 | { |
977 | struct enic *enic = netdev_priv(dev: netdev); |
978 | |
979 | if (enic_is_dynamic(enic) || enic_is_sriov_vf(enic)) { |
980 | if (!is_valid_ether_addr(addr) && !is_zero_ether_addr(addr)) |
981 | return -EADDRNOTAVAIL; |
982 | } else { |
983 | if (!is_valid_ether_addr(addr)) |
984 | return -EADDRNOTAVAIL; |
985 | } |
986 | |
987 | eth_hw_addr_set(dev: netdev, addr); |
988 | |
989 | return 0; |
990 | } |
991 | |
992 | static int enic_set_mac_address_dynamic(struct net_device *netdev, void *p) |
993 | { |
994 | struct enic *enic = netdev_priv(dev: netdev); |
995 | struct sockaddr *saddr = p; |
996 | char *addr = saddr->sa_data; |
997 | int err; |
998 | |
999 | if (netif_running(dev: enic->netdev)) { |
1000 | err = enic_dev_del_station_addr(enic); |
1001 | if (err) |
1002 | return err; |
1003 | } |
1004 | |
1005 | err = enic_set_mac_addr(netdev, addr); |
1006 | if (err) |
1007 | return err; |
1008 | |
1009 | if (netif_running(dev: enic->netdev)) { |
1010 | err = enic_dev_add_station_addr(enic); |
1011 | if (err) |
1012 | return err; |
1013 | } |
1014 | |
1015 | return err; |
1016 | } |
1017 | |
1018 | static int enic_set_mac_address(struct net_device *netdev, void *p) |
1019 | { |
1020 | struct sockaddr *saddr = p; |
1021 | char *addr = saddr->sa_data; |
1022 | struct enic *enic = netdev_priv(dev: netdev); |
1023 | int err; |
1024 | |
1025 | err = enic_dev_del_station_addr(enic); |
1026 | if (err) |
1027 | return err; |
1028 | |
1029 | err = enic_set_mac_addr(netdev, addr); |
1030 | if (err) |
1031 | return err; |
1032 | |
1033 | return enic_dev_add_station_addr(enic); |
1034 | } |
1035 | |
1036 | /* netif_tx_lock held, BHs disabled */ |
1037 | static void enic_set_rx_mode(struct net_device *netdev) |
1038 | { |
1039 | struct enic *enic = netdev_priv(dev: netdev); |
1040 | int directed = 1; |
1041 | int multicast = (netdev->flags & IFF_MULTICAST) ? 1 : 0; |
1042 | int broadcast = (netdev->flags & IFF_BROADCAST) ? 1 : 0; |
1043 | int promisc = (netdev->flags & IFF_PROMISC) || |
1044 | netdev_uc_count(netdev) > ENIC_UNICAST_PERFECT_FILTERS; |
1045 | int allmulti = (netdev->flags & IFF_ALLMULTI) || |
1046 | netdev_mc_count(netdev) > ENIC_MULTICAST_PERFECT_FILTERS; |
1047 | unsigned int flags = netdev->flags | |
1048 | (allmulti ? IFF_ALLMULTI : 0) | |
1049 | (promisc ? IFF_PROMISC : 0); |
1050 | |
1051 | if (enic->flags != flags) { |
1052 | enic->flags = flags; |
1053 | enic_dev_packet_filter(enic, directed, |
1054 | multicast, broadcast, promisc, allmulti); |
1055 | } |
1056 | |
1057 | if (!promisc) { |
1058 | __dev_uc_sync(dev: netdev, sync: enic_uc_sync, unsync: enic_uc_unsync); |
1059 | if (!allmulti) |
1060 | __dev_mc_sync(dev: netdev, sync: enic_mc_sync, unsync: enic_mc_unsync); |
1061 | } |
1062 | } |
1063 | |
1064 | /* netif_tx_lock held, BHs disabled */ |
1065 | static void enic_tx_timeout(struct net_device *netdev, unsigned int txqueue) |
1066 | { |
1067 | struct enic *enic = netdev_priv(dev: netdev); |
1068 | schedule_work(work: &enic->tx_hang_reset); |
1069 | } |
1070 | |
1071 | static int enic_set_vf_mac(struct net_device *netdev, int vf, u8 *mac) |
1072 | { |
1073 | struct enic *enic = netdev_priv(dev: netdev); |
1074 | struct enic_port_profile *pp; |
1075 | int err; |
1076 | |
1077 | ENIC_PP_BY_INDEX(enic, vf, pp, &err); |
1078 | if (err) |
1079 | return err; |
1080 | |
1081 | if (is_valid_ether_addr(addr: mac) || is_zero_ether_addr(addr: mac)) { |
1082 | if (vf == PORT_SELF_VF) { |
1083 | memcpy(pp->vf_mac, mac, ETH_ALEN); |
1084 | return 0; |
1085 | } else { |
1086 | /* |
1087 | * For sriov vf's set the mac in hw |
1088 | */ |
1089 | ENIC_DEVCMD_PROXY_BY_INDEX(vf, err, enic, |
1090 | vnic_dev_set_mac_addr, mac); |
1091 | return enic_dev_status_to_errno(devcmd_status: err); |
1092 | } |
1093 | } else |
1094 | return -EINVAL; |
1095 | } |
1096 | |
1097 | static int enic_set_vf_port(struct net_device *netdev, int vf, |
1098 | struct nlattr *port[]) |
1099 | { |
1100 | static const u8 zero_addr[ETH_ALEN] = {}; |
1101 | struct enic *enic = netdev_priv(dev: netdev); |
1102 | struct enic_port_profile prev_pp; |
1103 | struct enic_port_profile *pp; |
1104 | int err = 0, restore_pp = 1; |
1105 | |
1106 | ENIC_PP_BY_INDEX(enic, vf, pp, &err); |
1107 | if (err) |
1108 | return err; |
1109 | |
1110 | if (!port[IFLA_PORT_REQUEST]) |
1111 | return -EOPNOTSUPP; |
1112 | |
1113 | memcpy(&prev_pp, pp, sizeof(*enic->pp)); |
1114 | memset(pp, 0, sizeof(*enic->pp)); |
1115 | |
1116 | pp->set |= ENIC_SET_REQUEST; |
1117 | pp->request = nla_get_u8(nla: port[IFLA_PORT_REQUEST]); |
1118 | |
1119 | if (port[IFLA_PORT_PROFILE]) { |
1120 | pp->set |= ENIC_SET_NAME; |
1121 | memcpy(pp->name, nla_data(port[IFLA_PORT_PROFILE]), |
1122 | PORT_PROFILE_MAX); |
1123 | } |
1124 | |
1125 | if (port[IFLA_PORT_INSTANCE_UUID]) { |
1126 | pp->set |= ENIC_SET_INSTANCE; |
1127 | memcpy(pp->instance_uuid, |
1128 | nla_data(port[IFLA_PORT_INSTANCE_UUID]), PORT_UUID_MAX); |
1129 | } |
1130 | |
1131 | if (port[IFLA_PORT_HOST_UUID]) { |
1132 | pp->set |= ENIC_SET_HOST; |
1133 | memcpy(pp->host_uuid, |
1134 | nla_data(port[IFLA_PORT_HOST_UUID]), PORT_UUID_MAX); |
1135 | } |
1136 | |
1137 | if (vf == PORT_SELF_VF) { |
1138 | /* Special case handling: mac came from IFLA_VF_MAC */ |
1139 | if (!is_zero_ether_addr(addr: prev_pp.vf_mac)) |
1140 | memcpy(pp->mac_addr, prev_pp.vf_mac, ETH_ALEN); |
1141 | |
1142 | if (is_zero_ether_addr(addr: netdev->dev_addr)) |
1143 | eth_hw_addr_random(dev: netdev); |
1144 | } else { |
1145 | /* SR-IOV VF: get mac from adapter */ |
1146 | ENIC_DEVCMD_PROXY_BY_INDEX(vf, err, enic, |
1147 | vnic_dev_get_mac_addr, pp->mac_addr); |
1148 | if (err) { |
1149 | netdev_err(dev: netdev, format: "Error getting mac for vf %d\n" , vf); |
1150 | memcpy(pp, &prev_pp, sizeof(*pp)); |
1151 | return enic_dev_status_to_errno(devcmd_status: err); |
1152 | } |
1153 | } |
1154 | |
1155 | err = enic_process_set_pp_request(enic, vf, prev_pp: &prev_pp, restore_pp: &restore_pp); |
1156 | if (err) { |
1157 | if (restore_pp) { |
1158 | /* Things are still the way they were: Implicit |
1159 | * DISASSOCIATE failed |
1160 | */ |
1161 | memcpy(pp, &prev_pp, sizeof(*pp)); |
1162 | } else { |
1163 | memset(pp, 0, sizeof(*pp)); |
1164 | if (vf == PORT_SELF_VF) |
1165 | eth_hw_addr_set(dev: netdev, addr: zero_addr); |
1166 | } |
1167 | } else { |
1168 | /* Set flag to indicate that the port assoc/disassoc |
1169 | * request has been sent out to fw |
1170 | */ |
1171 | pp->set |= ENIC_PORT_REQUEST_APPLIED; |
1172 | |
1173 | /* If DISASSOCIATE, clean up all assigned/saved macaddresses */ |
1174 | if (pp->request == PORT_REQUEST_DISASSOCIATE) { |
1175 | eth_zero_addr(addr: pp->mac_addr); |
1176 | if (vf == PORT_SELF_VF) |
1177 | eth_hw_addr_set(dev: netdev, addr: zero_addr); |
1178 | } |
1179 | } |
1180 | |
1181 | if (vf == PORT_SELF_VF) |
1182 | eth_zero_addr(addr: pp->vf_mac); |
1183 | |
1184 | return err; |
1185 | } |
1186 | |
1187 | static int enic_get_vf_port(struct net_device *netdev, int vf, |
1188 | struct sk_buff *skb) |
1189 | { |
1190 | struct enic *enic = netdev_priv(dev: netdev); |
1191 | u16 response = PORT_PROFILE_RESPONSE_SUCCESS; |
1192 | struct enic_port_profile *pp; |
1193 | int err; |
1194 | |
1195 | ENIC_PP_BY_INDEX(enic, vf, pp, &err); |
1196 | if (err) |
1197 | return err; |
1198 | |
1199 | if (!(pp->set & ENIC_PORT_REQUEST_APPLIED)) |
1200 | return -ENODATA; |
1201 | |
1202 | err = enic_process_get_pp_request(enic, vf, request: pp->request, response: &response); |
1203 | if (err) |
1204 | return err; |
1205 | |
1206 | if (nla_put_u16(skb, attrtype: IFLA_PORT_REQUEST, value: pp->request) || |
1207 | nla_put_u16(skb, attrtype: IFLA_PORT_RESPONSE, value: response) || |
1208 | ((pp->set & ENIC_SET_NAME) && |
1209 | nla_put(skb, attrtype: IFLA_PORT_PROFILE, PORT_PROFILE_MAX, data: pp->name)) || |
1210 | ((pp->set & ENIC_SET_INSTANCE) && |
1211 | nla_put(skb, attrtype: IFLA_PORT_INSTANCE_UUID, PORT_UUID_MAX, |
1212 | data: pp->instance_uuid)) || |
1213 | ((pp->set & ENIC_SET_HOST) && |
1214 | nla_put(skb, attrtype: IFLA_PORT_HOST_UUID, PORT_UUID_MAX, data: pp->host_uuid))) |
1215 | goto nla_put_failure; |
1216 | return 0; |
1217 | |
1218 | nla_put_failure: |
1219 | return -EMSGSIZE; |
1220 | } |
1221 | |
1222 | static void enic_free_rq_buf(struct vnic_rq *rq, struct vnic_rq_buf *buf) |
1223 | { |
1224 | struct enic *enic = vnic_dev_priv(vdev: rq->vdev); |
1225 | |
1226 | if (!buf->os_buf) |
1227 | return; |
1228 | |
1229 | dma_unmap_single(&enic->pdev->dev, buf->dma_addr, buf->len, |
1230 | DMA_FROM_DEVICE); |
1231 | dev_kfree_skb_any(skb: buf->os_buf); |
1232 | buf->os_buf = NULL; |
1233 | } |
1234 | |
1235 | static int enic_rq_alloc_buf(struct vnic_rq *rq) |
1236 | { |
1237 | struct enic *enic = vnic_dev_priv(vdev: rq->vdev); |
1238 | struct net_device *netdev = enic->netdev; |
1239 | struct sk_buff *skb; |
1240 | unsigned int len = netdev->mtu + VLAN_ETH_HLEN; |
1241 | unsigned int os_buf_index = 0; |
1242 | dma_addr_t dma_addr; |
1243 | struct vnic_rq_buf *buf = rq->to_use; |
1244 | |
1245 | if (buf->os_buf) { |
1246 | enic_queue_rq_desc(rq, os_buf: buf->os_buf, os_buf_index, dma_addr: buf->dma_addr, |
1247 | len: buf->len); |
1248 | |
1249 | return 0; |
1250 | } |
1251 | skb = netdev_alloc_skb_ip_align(dev: netdev, length: len); |
1252 | if (!skb) |
1253 | return -ENOMEM; |
1254 | |
1255 | dma_addr = dma_map_single(&enic->pdev->dev, skb->data, len, |
1256 | DMA_FROM_DEVICE); |
1257 | if (unlikely(enic_dma_map_check(enic, dma_addr))) { |
1258 | dev_kfree_skb(skb); |
1259 | return -ENOMEM; |
1260 | } |
1261 | |
1262 | enic_queue_rq_desc(rq, os_buf: skb, os_buf_index, |
1263 | dma_addr, len); |
1264 | |
1265 | return 0; |
1266 | } |
1267 | |
1268 | static void enic_intr_update_pkt_size(struct vnic_rx_bytes_counter *pkt_size, |
1269 | u32 pkt_len) |
1270 | { |
1271 | if (ENIC_LARGE_PKT_THRESHOLD <= pkt_len) |
1272 | pkt_size->large_pkt_bytes_cnt += pkt_len; |
1273 | else |
1274 | pkt_size->small_pkt_bytes_cnt += pkt_len; |
1275 | } |
1276 | |
1277 | static bool enic_rxcopybreak(struct net_device *netdev, struct sk_buff **skb, |
1278 | struct vnic_rq_buf *buf, u16 len) |
1279 | { |
1280 | struct enic *enic = netdev_priv(dev: netdev); |
1281 | struct sk_buff *new_skb; |
1282 | |
1283 | if (len > enic->rx_copybreak) |
1284 | return false; |
1285 | new_skb = netdev_alloc_skb_ip_align(dev: netdev, length: len); |
1286 | if (!new_skb) |
1287 | return false; |
1288 | dma_sync_single_for_cpu(dev: &enic->pdev->dev, addr: buf->dma_addr, size: len, |
1289 | dir: DMA_FROM_DEVICE); |
1290 | memcpy(new_skb->data, (*skb)->data, len); |
1291 | *skb = new_skb; |
1292 | |
1293 | return true; |
1294 | } |
1295 | |
1296 | static void enic_rq_indicate_buf(struct vnic_rq *rq, |
1297 | struct cq_desc *cq_desc, struct vnic_rq_buf *buf, |
1298 | int skipped, void *opaque) |
1299 | { |
1300 | struct enic *enic = vnic_dev_priv(vdev: rq->vdev); |
1301 | struct net_device *netdev = enic->netdev; |
1302 | struct sk_buff *skb; |
1303 | struct vnic_cq *cq = &enic->cq[enic_cq_rq(enic, rq: rq->index)]; |
1304 | |
1305 | u8 type, color, eop, sop, ingress_port, vlan_stripped; |
1306 | u8 fcoe, fcoe_sof, fcoe_fc_crc_ok, fcoe_enc_error, fcoe_eof; |
1307 | u8 tcp_udp_csum_ok, udp, tcp, ipv4_csum_ok; |
1308 | u8 ipv6, ipv4, ipv4_fragment, fcs_ok, , csum_not_calc; |
1309 | u8 packet_error; |
1310 | u16 q_number, completed_index, bytes_written, vlan_tci, checksum; |
1311 | u32 ; |
1312 | bool outer_csum_ok = true, encap = false; |
1313 | |
1314 | if (skipped) |
1315 | return; |
1316 | |
1317 | skb = buf->os_buf; |
1318 | |
1319 | cq_enet_rq_desc_dec(desc: (struct cq_enet_rq_desc *)cq_desc, |
1320 | type: &type, color: &color, q_number: &q_number, completed_index: &completed_index, |
1321 | ingress_port: &ingress_port, fcoe: &fcoe, eop: &eop, sop: &sop, rss_type: &rss_type, |
1322 | csum_not_calc: &csum_not_calc, rss_hash: &rss_hash, bytes_written: &bytes_written, |
1323 | packet_error: &packet_error, vlan_stripped: &vlan_stripped, vlan_tci: &vlan_tci, checksum: &checksum, |
1324 | fcoe_sof: &fcoe_sof, fcoe_fc_crc_ok: &fcoe_fc_crc_ok, fcoe_enc_error: &fcoe_enc_error, |
1325 | fcoe_eof: &fcoe_eof, tcp_udp_csum_ok: &tcp_udp_csum_ok, udp: &udp, tcp: &tcp, |
1326 | ipv4_csum_ok: &ipv4_csum_ok, ipv6: &ipv6, ipv4: &ipv4, ipv4_fragment: &ipv4_fragment, |
1327 | fcs_ok: &fcs_ok); |
1328 | |
1329 | if (packet_error) { |
1330 | |
1331 | if (!fcs_ok) { |
1332 | if (bytes_written > 0) |
1333 | enic->rq_bad_fcs++; |
1334 | else if (bytes_written == 0) |
1335 | enic->rq_truncated_pkts++; |
1336 | } |
1337 | |
1338 | dma_unmap_single(&enic->pdev->dev, buf->dma_addr, buf->len, |
1339 | DMA_FROM_DEVICE); |
1340 | dev_kfree_skb_any(skb); |
1341 | buf->os_buf = NULL; |
1342 | |
1343 | return; |
1344 | } |
1345 | |
1346 | if (eop && bytes_written > 0) { |
1347 | |
1348 | /* Good receive |
1349 | */ |
1350 | |
1351 | if (!enic_rxcopybreak(netdev, skb: &skb, buf, len: bytes_written)) { |
1352 | buf->os_buf = NULL; |
1353 | dma_unmap_single(&enic->pdev->dev, buf->dma_addr, |
1354 | buf->len, DMA_FROM_DEVICE); |
1355 | } |
1356 | prefetch(skb->data - NET_IP_ALIGN); |
1357 | |
1358 | skb_put(skb, len: bytes_written); |
1359 | skb->protocol = eth_type_trans(skb, dev: netdev); |
1360 | skb_record_rx_queue(skb, rx_queue: q_number); |
1361 | if ((netdev->features & NETIF_F_RXHASH) && rss_hash && |
1362 | (type == 3)) { |
1363 | switch (rss_type) { |
1364 | case CQ_ENET_RQ_DESC_RSS_TYPE_TCP_IPv4: |
1365 | case CQ_ENET_RQ_DESC_RSS_TYPE_TCP_IPv6: |
1366 | case CQ_ENET_RQ_DESC_RSS_TYPE_TCP_IPv6_EX: |
1367 | skb_set_hash(skb, hash: rss_hash, type: PKT_HASH_TYPE_L4); |
1368 | break; |
1369 | case CQ_ENET_RQ_DESC_RSS_TYPE_IPv4: |
1370 | case CQ_ENET_RQ_DESC_RSS_TYPE_IPv6: |
1371 | case CQ_ENET_RQ_DESC_RSS_TYPE_IPv6_EX: |
1372 | skb_set_hash(skb, hash: rss_hash, type: PKT_HASH_TYPE_L3); |
1373 | break; |
1374 | } |
1375 | } |
1376 | if (enic->vxlan.vxlan_udp_port_number) { |
1377 | switch (enic->vxlan.patch_level) { |
1378 | case 0: |
1379 | if (fcoe) { |
1380 | encap = true; |
1381 | outer_csum_ok = fcoe_fc_crc_ok; |
1382 | } |
1383 | break; |
1384 | case 2: |
1385 | if ((type == 7) && |
1386 | (rss_hash & BIT(0))) { |
1387 | encap = true; |
1388 | outer_csum_ok = (rss_hash & BIT(1)) && |
1389 | (rss_hash & BIT(2)); |
1390 | } |
1391 | break; |
1392 | } |
1393 | } |
1394 | |
1395 | /* Hardware does not provide whole packet checksum. It only |
1396 | * provides pseudo checksum. Since hw validates the packet |
1397 | * checksum but not provide us the checksum value. use |
1398 | * CHECSUM_UNNECESSARY. |
1399 | * |
1400 | * In case of encap pkt tcp_udp_csum_ok/tcp_udp_csum_ok is |
1401 | * inner csum_ok. outer_csum_ok is set by hw when outer udp |
1402 | * csum is correct or is zero. |
1403 | */ |
1404 | if ((netdev->features & NETIF_F_RXCSUM) && !csum_not_calc && |
1405 | tcp_udp_csum_ok && outer_csum_ok && |
1406 | (ipv4_csum_ok || ipv6)) { |
1407 | skb->ip_summed = CHECKSUM_UNNECESSARY; |
1408 | skb->csum_level = encap; |
1409 | } |
1410 | |
1411 | if (vlan_stripped) |
1412 | __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vlan_tci); |
1413 | |
1414 | skb_mark_napi_id(skb, napi: &enic->napi[rq->index]); |
1415 | if (!(netdev->features & NETIF_F_GRO)) |
1416 | netif_receive_skb(skb); |
1417 | else |
1418 | napi_gro_receive(napi: &enic->napi[q_number], skb); |
1419 | if (enic->rx_coalesce_setting.use_adaptive_rx_coalesce) |
1420 | enic_intr_update_pkt_size(pkt_size: &cq->pkt_size_counter, |
1421 | pkt_len: bytes_written); |
1422 | } else { |
1423 | |
1424 | /* Buffer overflow |
1425 | */ |
1426 | |
1427 | dma_unmap_single(&enic->pdev->dev, buf->dma_addr, buf->len, |
1428 | DMA_FROM_DEVICE); |
1429 | dev_kfree_skb_any(skb); |
1430 | buf->os_buf = NULL; |
1431 | } |
1432 | } |
1433 | |
1434 | static int enic_rq_service(struct vnic_dev *vdev, struct cq_desc *cq_desc, |
1435 | u8 type, u16 q_number, u16 completed_index, void *opaque) |
1436 | { |
1437 | struct enic *enic = vnic_dev_priv(vdev); |
1438 | |
1439 | vnic_rq_service(rq: &enic->rq[q_number], cq_desc, |
1440 | completed_index, desc_return: VNIC_RQ_RETURN_DESC, |
1441 | buf_service: enic_rq_indicate_buf, opaque); |
1442 | |
1443 | return 0; |
1444 | } |
1445 | |
1446 | static void enic_set_int_moderation(struct enic *enic, struct vnic_rq *rq) |
1447 | { |
1448 | unsigned int intr = enic_msix_rq_intr(enic, rq: rq->index); |
1449 | struct vnic_cq *cq = &enic->cq[enic_cq_rq(enic, rq: rq->index)]; |
1450 | u32 timer = cq->tobe_rx_coal_timeval; |
1451 | |
1452 | if (cq->tobe_rx_coal_timeval != cq->cur_rx_coal_timeval) { |
1453 | vnic_intr_coalescing_timer_set(intr: &enic->intr[intr], coalescing_timer: timer); |
1454 | cq->cur_rx_coal_timeval = cq->tobe_rx_coal_timeval; |
1455 | } |
1456 | } |
1457 | |
1458 | static void enic_calc_int_moderation(struct enic *enic, struct vnic_rq *rq) |
1459 | { |
1460 | struct enic_rx_coal *rx_coal = &enic->rx_coalesce_setting; |
1461 | struct vnic_cq *cq = &enic->cq[enic_cq_rq(enic, rq: rq->index)]; |
1462 | struct vnic_rx_bytes_counter *pkt_size_counter = &cq->pkt_size_counter; |
1463 | int index; |
1464 | u32 timer; |
1465 | u32 range_start; |
1466 | u32 traffic; |
1467 | u64 delta; |
1468 | ktime_t now = ktime_get(); |
1469 | |
1470 | delta = ktime_us_delta(later: now, earlier: cq->prev_ts); |
1471 | if (delta < ENIC_AIC_TS_BREAK) |
1472 | return; |
1473 | cq->prev_ts = now; |
1474 | |
1475 | traffic = pkt_size_counter->large_pkt_bytes_cnt + |
1476 | pkt_size_counter->small_pkt_bytes_cnt; |
1477 | /* The table takes Mbps |
1478 | * traffic *= 8 => bits |
1479 | * traffic *= (10^6 / delta) => bps |
1480 | * traffic /= 10^6 => Mbps |
1481 | * |
1482 | * Combining, traffic *= (8 / delta) |
1483 | */ |
1484 | |
1485 | traffic <<= 3; |
1486 | traffic = delta > UINT_MAX ? 0 : traffic / (u32)delta; |
1487 | |
1488 | for (index = 0; index < ENIC_MAX_COALESCE_TIMERS; index++) |
1489 | if (traffic < mod_table[index].rx_rate) |
1490 | break; |
1491 | range_start = (pkt_size_counter->small_pkt_bytes_cnt > |
1492 | pkt_size_counter->large_pkt_bytes_cnt << 1) ? |
1493 | rx_coal->small_pkt_range_start : |
1494 | rx_coal->large_pkt_range_start; |
1495 | timer = range_start + ((rx_coal->range_end - range_start) * |
1496 | mod_table[index].range_percent / 100); |
1497 | /* Damping */ |
1498 | cq->tobe_rx_coal_timeval = (timer + cq->tobe_rx_coal_timeval) >> 1; |
1499 | |
1500 | pkt_size_counter->large_pkt_bytes_cnt = 0; |
1501 | pkt_size_counter->small_pkt_bytes_cnt = 0; |
1502 | } |
1503 | |
1504 | static int enic_poll(struct napi_struct *napi, int budget) |
1505 | { |
1506 | struct net_device *netdev = napi->dev; |
1507 | struct enic *enic = netdev_priv(dev: netdev); |
1508 | unsigned int cq_rq = enic_cq_rq(enic, rq: 0); |
1509 | unsigned int cq_wq = enic_cq_wq(enic, wq: 0); |
1510 | unsigned int intr = ENIC_LEGACY_IO_INTR; |
1511 | unsigned int rq_work_to_do = budget; |
1512 | unsigned int wq_work_to_do = ENIC_WQ_NAPI_BUDGET; |
1513 | unsigned int work_done, rq_work_done = 0, wq_work_done; |
1514 | int err; |
1515 | |
1516 | wq_work_done = vnic_cq_service(cq: &enic->cq[cq_wq], work_to_do: wq_work_to_do, |
1517 | q_service: enic_wq_service, NULL); |
1518 | |
1519 | if (budget > 0) |
1520 | rq_work_done = vnic_cq_service(cq: &enic->cq[cq_rq], |
1521 | work_to_do: rq_work_to_do, q_service: enic_rq_service, NULL); |
1522 | |
1523 | /* Accumulate intr event credits for this polling |
1524 | * cycle. An intr event is the completion of a |
1525 | * a WQ or RQ packet. |
1526 | */ |
1527 | |
1528 | work_done = rq_work_done + wq_work_done; |
1529 | |
1530 | if (work_done > 0) |
1531 | vnic_intr_return_credits(intr: &enic->intr[intr], |
1532 | credits: work_done, |
1533 | unmask: 0 /* don't unmask intr */, |
1534 | reset_timer: 0 /* don't reset intr timer */); |
1535 | |
1536 | err = vnic_rq_fill(rq: &enic->rq[0], buf_fill: enic_rq_alloc_buf); |
1537 | |
1538 | /* Buffer allocation failed. Stay in polling |
1539 | * mode so we can try to fill the ring again. |
1540 | */ |
1541 | |
1542 | if (err) |
1543 | rq_work_done = rq_work_to_do; |
1544 | if (enic->rx_coalesce_setting.use_adaptive_rx_coalesce) |
1545 | /* Call the function which refreshes the intr coalescing timer |
1546 | * value based on the traffic. |
1547 | */ |
1548 | enic_calc_int_moderation(enic, rq: &enic->rq[0]); |
1549 | |
1550 | if ((rq_work_done < budget) && napi_complete_done(n: napi, work_done: rq_work_done)) { |
1551 | |
1552 | /* Some work done, but not enough to stay in polling, |
1553 | * exit polling |
1554 | */ |
1555 | |
1556 | if (enic->rx_coalesce_setting.use_adaptive_rx_coalesce) |
1557 | enic_set_int_moderation(enic, rq: &enic->rq[0]); |
1558 | vnic_intr_unmask(intr: &enic->intr[intr]); |
1559 | } |
1560 | |
1561 | return rq_work_done; |
1562 | } |
1563 | |
1564 | #ifdef CONFIG_RFS_ACCEL |
1565 | static void enic_free_rx_cpu_rmap(struct enic *enic) |
1566 | { |
1567 | free_irq_cpu_rmap(rmap: enic->netdev->rx_cpu_rmap); |
1568 | enic->netdev->rx_cpu_rmap = NULL; |
1569 | } |
1570 | |
1571 | static void enic_set_rx_cpu_rmap(struct enic *enic) |
1572 | { |
1573 | int i, res; |
1574 | |
1575 | if (vnic_dev_get_intr_mode(vdev: enic->vdev) == VNIC_DEV_INTR_MODE_MSIX) { |
1576 | enic->netdev->rx_cpu_rmap = alloc_irq_cpu_rmap(size: enic->rq_count); |
1577 | if (unlikely(!enic->netdev->rx_cpu_rmap)) |
1578 | return; |
1579 | for (i = 0; i < enic->rq_count; i++) { |
1580 | res = irq_cpu_rmap_add(rmap: enic->netdev->rx_cpu_rmap, |
1581 | irq: enic->msix_entry[i].vector); |
1582 | if (unlikely(res)) { |
1583 | enic_free_rx_cpu_rmap(enic); |
1584 | return; |
1585 | } |
1586 | } |
1587 | } |
1588 | } |
1589 | |
1590 | #else |
1591 | |
1592 | static void enic_free_rx_cpu_rmap(struct enic *enic) |
1593 | { |
1594 | } |
1595 | |
1596 | static void enic_set_rx_cpu_rmap(struct enic *enic) |
1597 | { |
1598 | } |
1599 | |
1600 | #endif /* CONFIG_RFS_ACCEL */ |
1601 | |
1602 | static int enic_poll_msix_wq(struct napi_struct *napi, int budget) |
1603 | { |
1604 | struct net_device *netdev = napi->dev; |
1605 | struct enic *enic = netdev_priv(dev: netdev); |
1606 | unsigned int wq_index = (napi - &enic->napi[0]) - enic->rq_count; |
1607 | struct vnic_wq *wq = &enic->wq[wq_index]; |
1608 | unsigned int cq; |
1609 | unsigned int intr; |
1610 | unsigned int wq_work_to_do = ENIC_WQ_NAPI_BUDGET; |
1611 | unsigned int wq_work_done; |
1612 | unsigned int wq_irq; |
1613 | |
1614 | wq_irq = wq->index; |
1615 | cq = enic_cq_wq(enic, wq: wq_irq); |
1616 | intr = enic_msix_wq_intr(enic, wq: wq_irq); |
1617 | wq_work_done = vnic_cq_service(cq: &enic->cq[cq], work_to_do: wq_work_to_do, |
1618 | q_service: enic_wq_service, NULL); |
1619 | |
1620 | vnic_intr_return_credits(intr: &enic->intr[intr], credits: wq_work_done, |
1621 | unmask: 0 /* don't unmask intr */, |
1622 | reset_timer: 1 /* reset intr timer */); |
1623 | if (!wq_work_done) { |
1624 | napi_complete(n: napi); |
1625 | vnic_intr_unmask(intr: &enic->intr[intr]); |
1626 | return 0; |
1627 | } |
1628 | |
1629 | return budget; |
1630 | } |
1631 | |
1632 | static int enic_poll_msix_rq(struct napi_struct *napi, int budget) |
1633 | { |
1634 | struct net_device *netdev = napi->dev; |
1635 | struct enic *enic = netdev_priv(dev: netdev); |
1636 | unsigned int rq = (napi - &enic->napi[0]); |
1637 | unsigned int cq = enic_cq_rq(enic, rq); |
1638 | unsigned int intr = enic_msix_rq_intr(enic, rq); |
1639 | unsigned int work_to_do = budget; |
1640 | unsigned int work_done = 0; |
1641 | int err; |
1642 | |
1643 | /* Service RQ |
1644 | */ |
1645 | |
1646 | if (budget > 0) |
1647 | work_done = vnic_cq_service(cq: &enic->cq[cq], |
1648 | work_to_do, q_service: enic_rq_service, NULL); |
1649 | |
1650 | /* Return intr event credits for this polling |
1651 | * cycle. An intr event is the completion of a |
1652 | * RQ packet. |
1653 | */ |
1654 | |
1655 | if (work_done > 0) |
1656 | vnic_intr_return_credits(intr: &enic->intr[intr], |
1657 | credits: work_done, |
1658 | unmask: 0 /* don't unmask intr */, |
1659 | reset_timer: 0 /* don't reset intr timer */); |
1660 | |
1661 | err = vnic_rq_fill(rq: &enic->rq[rq], buf_fill: enic_rq_alloc_buf); |
1662 | |
1663 | /* Buffer allocation failed. Stay in polling mode |
1664 | * so we can try to fill the ring again. |
1665 | */ |
1666 | |
1667 | if (err) |
1668 | work_done = work_to_do; |
1669 | if (enic->rx_coalesce_setting.use_adaptive_rx_coalesce) |
1670 | /* Call the function which refreshes the intr coalescing timer |
1671 | * value based on the traffic. |
1672 | */ |
1673 | enic_calc_int_moderation(enic, rq: &enic->rq[rq]); |
1674 | |
1675 | if ((work_done < budget) && napi_complete_done(n: napi, work_done)) { |
1676 | |
1677 | /* Some work done, but not enough to stay in polling, |
1678 | * exit polling |
1679 | */ |
1680 | |
1681 | if (enic->rx_coalesce_setting.use_adaptive_rx_coalesce) |
1682 | enic_set_int_moderation(enic, rq: &enic->rq[rq]); |
1683 | vnic_intr_unmask(intr: &enic->intr[intr]); |
1684 | } |
1685 | |
1686 | return work_done; |
1687 | } |
1688 | |
1689 | static void enic_notify_timer(struct timer_list *t) |
1690 | { |
1691 | struct enic *enic = from_timer(enic, t, notify_timer); |
1692 | |
1693 | enic_notify_check(enic); |
1694 | |
1695 | mod_timer(timer: &enic->notify_timer, |
1696 | expires: round_jiffies(j: jiffies + ENIC_NOTIFY_TIMER_PERIOD)); |
1697 | } |
1698 | |
1699 | static void enic_free_intr(struct enic *enic) |
1700 | { |
1701 | struct net_device *netdev = enic->netdev; |
1702 | unsigned int i; |
1703 | |
1704 | enic_free_rx_cpu_rmap(enic); |
1705 | switch (vnic_dev_get_intr_mode(vdev: enic->vdev)) { |
1706 | case VNIC_DEV_INTR_MODE_INTX: |
1707 | free_irq(enic->pdev->irq, netdev); |
1708 | break; |
1709 | case VNIC_DEV_INTR_MODE_MSI: |
1710 | free_irq(enic->pdev->irq, enic); |
1711 | break; |
1712 | case VNIC_DEV_INTR_MODE_MSIX: |
1713 | for (i = 0; i < ARRAY_SIZE(enic->msix); i++) |
1714 | if (enic->msix[i].requested) |
1715 | free_irq(enic->msix_entry[i].vector, |
1716 | enic->msix[i].devid); |
1717 | break; |
1718 | default: |
1719 | break; |
1720 | } |
1721 | } |
1722 | |
1723 | static int enic_request_intr(struct enic *enic) |
1724 | { |
1725 | struct net_device *netdev = enic->netdev; |
1726 | unsigned int i, intr; |
1727 | int err = 0; |
1728 | |
1729 | enic_set_rx_cpu_rmap(enic); |
1730 | switch (vnic_dev_get_intr_mode(vdev: enic->vdev)) { |
1731 | |
1732 | case VNIC_DEV_INTR_MODE_INTX: |
1733 | |
1734 | err = request_irq(irq: enic->pdev->irq, handler: enic_isr_legacy, |
1735 | IRQF_SHARED, name: netdev->name, dev: netdev); |
1736 | break; |
1737 | |
1738 | case VNIC_DEV_INTR_MODE_MSI: |
1739 | |
1740 | err = request_irq(irq: enic->pdev->irq, handler: enic_isr_msi, |
1741 | flags: 0, name: netdev->name, dev: enic); |
1742 | break; |
1743 | |
1744 | case VNIC_DEV_INTR_MODE_MSIX: |
1745 | |
1746 | for (i = 0; i < enic->rq_count; i++) { |
1747 | intr = enic_msix_rq_intr(enic, rq: i); |
1748 | snprintf(buf: enic->msix[intr].devname, |
1749 | size: sizeof(enic->msix[intr].devname), |
1750 | fmt: "%s-rx-%u" , netdev->name, i); |
1751 | enic->msix[intr].isr = enic_isr_msix; |
1752 | enic->msix[intr].devid = &enic->napi[i]; |
1753 | } |
1754 | |
1755 | for (i = 0; i < enic->wq_count; i++) { |
1756 | int wq = enic_cq_wq(enic, wq: i); |
1757 | |
1758 | intr = enic_msix_wq_intr(enic, wq: i); |
1759 | snprintf(buf: enic->msix[intr].devname, |
1760 | size: sizeof(enic->msix[intr].devname), |
1761 | fmt: "%s-tx-%u" , netdev->name, i); |
1762 | enic->msix[intr].isr = enic_isr_msix; |
1763 | enic->msix[intr].devid = &enic->napi[wq]; |
1764 | } |
1765 | |
1766 | intr = enic_msix_err_intr(enic); |
1767 | snprintf(buf: enic->msix[intr].devname, |
1768 | size: sizeof(enic->msix[intr].devname), |
1769 | fmt: "%s-err" , netdev->name); |
1770 | enic->msix[intr].isr = enic_isr_msix_err; |
1771 | enic->msix[intr].devid = enic; |
1772 | |
1773 | intr = enic_msix_notify_intr(enic); |
1774 | snprintf(buf: enic->msix[intr].devname, |
1775 | size: sizeof(enic->msix[intr].devname), |
1776 | fmt: "%s-notify" , netdev->name); |
1777 | enic->msix[intr].isr = enic_isr_msix_notify; |
1778 | enic->msix[intr].devid = enic; |
1779 | |
1780 | for (i = 0; i < ARRAY_SIZE(enic->msix); i++) |
1781 | enic->msix[i].requested = 0; |
1782 | |
1783 | for (i = 0; i < enic->intr_count; i++) { |
1784 | err = request_irq(irq: enic->msix_entry[i].vector, |
1785 | handler: enic->msix[i].isr, flags: 0, |
1786 | name: enic->msix[i].devname, |
1787 | dev: enic->msix[i].devid); |
1788 | if (err) { |
1789 | enic_free_intr(enic); |
1790 | break; |
1791 | } |
1792 | enic->msix[i].requested = 1; |
1793 | } |
1794 | |
1795 | break; |
1796 | |
1797 | default: |
1798 | break; |
1799 | } |
1800 | |
1801 | return err; |
1802 | } |
1803 | |
1804 | static void enic_synchronize_irqs(struct enic *enic) |
1805 | { |
1806 | unsigned int i; |
1807 | |
1808 | switch (vnic_dev_get_intr_mode(vdev: enic->vdev)) { |
1809 | case VNIC_DEV_INTR_MODE_INTX: |
1810 | case VNIC_DEV_INTR_MODE_MSI: |
1811 | synchronize_irq(irq: enic->pdev->irq); |
1812 | break; |
1813 | case VNIC_DEV_INTR_MODE_MSIX: |
1814 | for (i = 0; i < enic->intr_count; i++) |
1815 | synchronize_irq(irq: enic->msix_entry[i].vector); |
1816 | break; |
1817 | default: |
1818 | break; |
1819 | } |
1820 | } |
1821 | |
1822 | static void enic_set_rx_coal_setting(struct enic *enic) |
1823 | { |
1824 | unsigned int speed; |
1825 | int index = -1; |
1826 | struct enic_rx_coal *rx_coal = &enic->rx_coalesce_setting; |
1827 | |
1828 | /* 1. Read the link speed from fw |
1829 | * 2. Pick the default range for the speed |
1830 | * 3. Update it in enic->rx_coalesce_setting |
1831 | */ |
1832 | speed = vnic_dev_port_speed(vdev: enic->vdev); |
1833 | if (ENIC_LINK_SPEED_10G < speed) |
1834 | index = ENIC_LINK_40G_INDEX; |
1835 | else if (ENIC_LINK_SPEED_4G < speed) |
1836 | index = ENIC_LINK_10G_INDEX; |
1837 | else |
1838 | index = ENIC_LINK_4G_INDEX; |
1839 | |
1840 | rx_coal->small_pkt_range_start = mod_range[index].small_pkt_range_start; |
1841 | rx_coal->large_pkt_range_start = mod_range[index].large_pkt_range_start; |
1842 | rx_coal->range_end = ENIC_RX_COALESCE_RANGE_END; |
1843 | |
1844 | /* Start with the value provided by UCSM */ |
1845 | for (index = 0; index < enic->rq_count; index++) |
1846 | enic->cq[index].cur_rx_coal_timeval = |
1847 | enic->config.intr_timer_usec; |
1848 | |
1849 | rx_coal->use_adaptive_rx_coalesce = 1; |
1850 | } |
1851 | |
1852 | static int enic_dev_notify_set(struct enic *enic) |
1853 | { |
1854 | int err; |
1855 | |
1856 | spin_lock_bh(lock: &enic->devcmd_lock); |
1857 | switch (vnic_dev_get_intr_mode(vdev: enic->vdev)) { |
1858 | case VNIC_DEV_INTR_MODE_INTX: |
1859 | err = vnic_dev_notify_set(vdev: enic->vdev, ENIC_LEGACY_NOTIFY_INTR); |
1860 | break; |
1861 | case VNIC_DEV_INTR_MODE_MSIX: |
1862 | err = vnic_dev_notify_set(vdev: enic->vdev, |
1863 | intr: enic_msix_notify_intr(enic)); |
1864 | break; |
1865 | default: |
1866 | err = vnic_dev_notify_set(vdev: enic->vdev, intr: -1 /* no intr */); |
1867 | break; |
1868 | } |
1869 | spin_unlock_bh(lock: &enic->devcmd_lock); |
1870 | |
1871 | return err; |
1872 | } |
1873 | |
1874 | static void enic_notify_timer_start(struct enic *enic) |
1875 | { |
1876 | switch (vnic_dev_get_intr_mode(vdev: enic->vdev)) { |
1877 | case VNIC_DEV_INTR_MODE_MSI: |
1878 | mod_timer(timer: &enic->notify_timer, expires: jiffies); |
1879 | break; |
1880 | default: |
1881 | /* Using intr for notification for INTx/MSI-X */ |
1882 | break; |
1883 | } |
1884 | } |
1885 | |
1886 | /* rtnl lock is held, process context */ |
1887 | static int enic_open(struct net_device *netdev) |
1888 | { |
1889 | struct enic *enic = netdev_priv(dev: netdev); |
1890 | unsigned int i; |
1891 | int err, ret; |
1892 | |
1893 | err = enic_request_intr(enic); |
1894 | if (err) { |
1895 | netdev_err(dev: netdev, format: "Unable to request irq.\n" ); |
1896 | return err; |
1897 | } |
1898 | enic_init_affinity_hint(enic); |
1899 | enic_set_affinity_hint(enic); |
1900 | |
1901 | err = enic_dev_notify_set(enic); |
1902 | if (err) { |
1903 | netdev_err(dev: netdev, |
1904 | format: "Failed to alloc notify buffer, aborting.\n" ); |
1905 | goto err_out_free_intr; |
1906 | } |
1907 | |
1908 | for (i = 0; i < enic->rq_count; i++) { |
1909 | /* enable rq before updating rq desc */ |
1910 | vnic_rq_enable(rq: &enic->rq[i]); |
1911 | vnic_rq_fill(rq: &enic->rq[i], buf_fill: enic_rq_alloc_buf); |
1912 | /* Need at least one buffer on ring to get going */ |
1913 | if (vnic_rq_desc_used(rq: &enic->rq[i]) == 0) { |
1914 | netdev_err(dev: netdev, format: "Unable to alloc receive buffers\n" ); |
1915 | err = -ENOMEM; |
1916 | goto err_out_free_rq; |
1917 | } |
1918 | } |
1919 | |
1920 | for (i = 0; i < enic->wq_count; i++) |
1921 | vnic_wq_enable(wq: &enic->wq[i]); |
1922 | |
1923 | if (!enic_is_dynamic(enic) && !enic_is_sriov_vf(enic)) |
1924 | enic_dev_add_station_addr(enic); |
1925 | |
1926 | enic_set_rx_mode(netdev); |
1927 | |
1928 | netif_tx_wake_all_queues(dev: netdev); |
1929 | |
1930 | for (i = 0; i < enic->rq_count; i++) |
1931 | napi_enable(n: &enic->napi[i]); |
1932 | |
1933 | if (vnic_dev_get_intr_mode(vdev: enic->vdev) == VNIC_DEV_INTR_MODE_MSIX) |
1934 | for (i = 0; i < enic->wq_count; i++) |
1935 | napi_enable(n: &enic->napi[enic_cq_wq(enic, wq: i)]); |
1936 | enic_dev_enable(enic); |
1937 | |
1938 | for (i = 0; i < enic->intr_count; i++) |
1939 | vnic_intr_unmask(intr: &enic->intr[i]); |
1940 | |
1941 | enic_notify_timer_start(enic); |
1942 | enic_rfs_timer_start(enic); |
1943 | |
1944 | return 0; |
1945 | |
1946 | err_out_free_rq: |
1947 | for (i = 0; i < enic->rq_count; i++) { |
1948 | ret = vnic_rq_disable(rq: &enic->rq[i]); |
1949 | if (!ret) |
1950 | vnic_rq_clean(rq: &enic->rq[i], buf_clean: enic_free_rq_buf); |
1951 | } |
1952 | enic_dev_notify_unset(enic); |
1953 | err_out_free_intr: |
1954 | enic_unset_affinity_hint(enic); |
1955 | enic_free_intr(enic); |
1956 | |
1957 | return err; |
1958 | } |
1959 | |
1960 | /* rtnl lock is held, process context */ |
1961 | static int enic_stop(struct net_device *netdev) |
1962 | { |
1963 | struct enic *enic = netdev_priv(dev: netdev); |
1964 | unsigned int i; |
1965 | int err; |
1966 | |
1967 | for (i = 0; i < enic->intr_count; i++) { |
1968 | vnic_intr_mask(intr: &enic->intr[i]); |
1969 | (void)vnic_intr_masked(intr: &enic->intr[i]); /* flush write */ |
1970 | } |
1971 | |
1972 | enic_synchronize_irqs(enic); |
1973 | |
1974 | del_timer_sync(timer: &enic->notify_timer); |
1975 | enic_rfs_flw_tbl_free(enic); |
1976 | |
1977 | enic_dev_disable(enic); |
1978 | |
1979 | for (i = 0; i < enic->rq_count; i++) |
1980 | napi_disable(n: &enic->napi[i]); |
1981 | |
1982 | netif_carrier_off(dev: netdev); |
1983 | if (vnic_dev_get_intr_mode(vdev: enic->vdev) == VNIC_DEV_INTR_MODE_MSIX) |
1984 | for (i = 0; i < enic->wq_count; i++) |
1985 | napi_disable(n: &enic->napi[enic_cq_wq(enic, wq: i)]); |
1986 | netif_tx_disable(dev: netdev); |
1987 | |
1988 | if (!enic_is_dynamic(enic) && !enic_is_sriov_vf(enic)) |
1989 | enic_dev_del_station_addr(enic); |
1990 | |
1991 | for (i = 0; i < enic->wq_count; i++) { |
1992 | err = vnic_wq_disable(wq: &enic->wq[i]); |
1993 | if (err) |
1994 | return err; |
1995 | } |
1996 | for (i = 0; i < enic->rq_count; i++) { |
1997 | err = vnic_rq_disable(rq: &enic->rq[i]); |
1998 | if (err) |
1999 | return err; |
2000 | } |
2001 | |
2002 | enic_dev_notify_unset(enic); |
2003 | enic_unset_affinity_hint(enic); |
2004 | enic_free_intr(enic); |
2005 | |
2006 | for (i = 0; i < enic->wq_count; i++) |
2007 | vnic_wq_clean(wq: &enic->wq[i], buf_clean: enic_free_wq_buf); |
2008 | for (i = 0; i < enic->rq_count; i++) |
2009 | vnic_rq_clean(rq: &enic->rq[i], buf_clean: enic_free_rq_buf); |
2010 | for (i = 0; i < enic->cq_count; i++) |
2011 | vnic_cq_clean(cq: &enic->cq[i]); |
2012 | for (i = 0; i < enic->intr_count; i++) |
2013 | vnic_intr_clean(intr: &enic->intr[i]); |
2014 | |
2015 | return 0; |
2016 | } |
2017 | |
2018 | static int _enic_change_mtu(struct net_device *netdev, int new_mtu) |
2019 | { |
2020 | bool running = netif_running(dev: netdev); |
2021 | int err = 0; |
2022 | |
2023 | ASSERT_RTNL(); |
2024 | if (running) { |
2025 | err = enic_stop(netdev); |
2026 | if (err) |
2027 | return err; |
2028 | } |
2029 | |
2030 | netdev->mtu = new_mtu; |
2031 | |
2032 | if (running) { |
2033 | err = enic_open(netdev); |
2034 | if (err) |
2035 | return err; |
2036 | } |
2037 | |
2038 | return 0; |
2039 | } |
2040 | |
2041 | static int enic_change_mtu(struct net_device *netdev, int new_mtu) |
2042 | { |
2043 | struct enic *enic = netdev_priv(dev: netdev); |
2044 | |
2045 | if (enic_is_dynamic(enic) || enic_is_sriov_vf(enic)) |
2046 | return -EOPNOTSUPP; |
2047 | |
2048 | if (netdev->mtu > enic->port_mtu) |
2049 | netdev_warn(dev: netdev, |
2050 | format: "interface MTU (%d) set higher than port MTU (%d)\n" , |
2051 | netdev->mtu, enic->port_mtu); |
2052 | |
2053 | return _enic_change_mtu(netdev, new_mtu); |
2054 | } |
2055 | |
2056 | static void enic_change_mtu_work(struct work_struct *work) |
2057 | { |
2058 | struct enic *enic = container_of(work, struct enic, change_mtu_work); |
2059 | struct net_device *netdev = enic->netdev; |
2060 | int new_mtu = vnic_dev_mtu(vdev: enic->vdev); |
2061 | |
2062 | rtnl_lock(); |
2063 | (void)_enic_change_mtu(netdev, new_mtu); |
2064 | rtnl_unlock(); |
2065 | |
2066 | netdev_info(dev: netdev, format: "interface MTU set as %d\n" , netdev->mtu); |
2067 | } |
2068 | |
2069 | #ifdef CONFIG_NET_POLL_CONTROLLER |
2070 | static void enic_poll_controller(struct net_device *netdev) |
2071 | { |
2072 | struct enic *enic = netdev_priv(dev: netdev); |
2073 | struct vnic_dev *vdev = enic->vdev; |
2074 | unsigned int i, intr; |
2075 | |
2076 | switch (vnic_dev_get_intr_mode(vdev)) { |
2077 | case VNIC_DEV_INTR_MODE_MSIX: |
2078 | for (i = 0; i < enic->rq_count; i++) { |
2079 | intr = enic_msix_rq_intr(enic, rq: i); |
2080 | enic_isr_msix(irq: enic->msix_entry[intr].vector, |
2081 | data: &enic->napi[i]); |
2082 | } |
2083 | |
2084 | for (i = 0; i < enic->wq_count; i++) { |
2085 | intr = enic_msix_wq_intr(enic, wq: i); |
2086 | enic_isr_msix(irq: enic->msix_entry[intr].vector, |
2087 | data: &enic->napi[enic_cq_wq(enic, wq: i)]); |
2088 | } |
2089 | |
2090 | break; |
2091 | case VNIC_DEV_INTR_MODE_MSI: |
2092 | enic_isr_msi(irq: enic->pdev->irq, data: enic); |
2093 | break; |
2094 | case VNIC_DEV_INTR_MODE_INTX: |
2095 | enic_isr_legacy(irq: enic->pdev->irq, data: netdev); |
2096 | break; |
2097 | default: |
2098 | break; |
2099 | } |
2100 | } |
2101 | #endif |
2102 | |
2103 | static int enic_dev_wait(struct vnic_dev *vdev, |
2104 | int (*start)(struct vnic_dev *, int), |
2105 | int (*finished)(struct vnic_dev *, int *), |
2106 | int arg) |
2107 | { |
2108 | unsigned long time; |
2109 | int done; |
2110 | int err; |
2111 | |
2112 | err = start(vdev, arg); |
2113 | if (err) |
2114 | return err; |
2115 | |
2116 | /* Wait for func to complete...2 seconds max |
2117 | */ |
2118 | |
2119 | time = jiffies + (HZ * 2); |
2120 | do { |
2121 | |
2122 | err = finished(vdev, &done); |
2123 | if (err) |
2124 | return err; |
2125 | |
2126 | if (done) |
2127 | return 0; |
2128 | |
2129 | schedule_timeout_uninterruptible(HZ / 10); |
2130 | |
2131 | } while (time_after(time, jiffies)); |
2132 | |
2133 | return -ETIMEDOUT; |
2134 | } |
2135 | |
2136 | static int enic_dev_open(struct enic *enic) |
2137 | { |
2138 | int err; |
2139 | u32 flags = CMD_OPENF_IG_DESCCACHE; |
2140 | |
2141 | err = enic_dev_wait(vdev: enic->vdev, start: vnic_dev_open, |
2142 | finished: vnic_dev_open_done, arg: flags); |
2143 | if (err) |
2144 | dev_err(enic_get_dev(enic), "vNIC device open failed, err %d\n" , |
2145 | err); |
2146 | |
2147 | return err; |
2148 | } |
2149 | |
2150 | static int enic_dev_soft_reset(struct enic *enic) |
2151 | { |
2152 | int err; |
2153 | |
2154 | err = enic_dev_wait(vdev: enic->vdev, start: vnic_dev_soft_reset, |
2155 | finished: vnic_dev_soft_reset_done, arg: 0); |
2156 | if (err) |
2157 | netdev_err(dev: enic->netdev, format: "vNIC soft reset failed, err %d\n" , |
2158 | err); |
2159 | |
2160 | return err; |
2161 | } |
2162 | |
2163 | static int enic_dev_hang_reset(struct enic *enic) |
2164 | { |
2165 | int err; |
2166 | |
2167 | err = enic_dev_wait(vdev: enic->vdev, start: vnic_dev_hang_reset, |
2168 | finished: vnic_dev_hang_reset_done, arg: 0); |
2169 | if (err) |
2170 | netdev_err(dev: enic->netdev, format: "vNIC hang reset failed, err %d\n" , |
2171 | err); |
2172 | |
2173 | return err; |
2174 | } |
2175 | |
2176 | int (struct enic *enic) |
2177 | { |
2178 | union vnic_rss_key *; |
2179 | dma_addr_t ; |
2180 | int i, kidx, bidx, err; |
2181 | |
2182 | rss_key_buf_va = dma_alloc_coherent(dev: &enic->pdev->dev, |
2183 | size: sizeof(union vnic_rss_key), |
2184 | dma_handle: &rss_key_buf_pa, GFP_ATOMIC); |
2185 | if (!rss_key_buf_va) |
2186 | return -ENOMEM; |
2187 | |
2188 | for (i = 0; i < ENIC_RSS_LEN; i++) { |
2189 | kidx = i / ENIC_RSS_BYTES_PER_KEY; |
2190 | bidx = i % ENIC_RSS_BYTES_PER_KEY; |
2191 | rss_key_buf_va->key[kidx].b[bidx] = enic->rss_key[i]; |
2192 | } |
2193 | spin_lock_bh(lock: &enic->devcmd_lock); |
2194 | err = enic_set_rss_key(enic, |
2195 | key_pa: rss_key_buf_pa, |
2196 | len: sizeof(union vnic_rss_key)); |
2197 | spin_unlock_bh(lock: &enic->devcmd_lock); |
2198 | |
2199 | dma_free_coherent(dev: &enic->pdev->dev, size: sizeof(union vnic_rss_key), |
2200 | cpu_addr: rss_key_buf_va, dma_handle: rss_key_buf_pa); |
2201 | |
2202 | return err; |
2203 | } |
2204 | |
2205 | static int (struct enic *enic) |
2206 | { |
2207 | netdev_rss_key_fill(buffer: enic->rss_key, ENIC_RSS_LEN); |
2208 | |
2209 | return __enic_set_rsskey(enic); |
2210 | } |
2211 | |
2212 | static int (struct enic *enic, u8 ) |
2213 | { |
2214 | dma_addr_t ; |
2215 | union vnic_rss_cpu * = NULL; |
2216 | unsigned int i; |
2217 | int err; |
2218 | |
2219 | rss_cpu_buf_va = dma_alloc_coherent(dev: &enic->pdev->dev, |
2220 | size: sizeof(union vnic_rss_cpu), |
2221 | dma_handle: &rss_cpu_buf_pa, GFP_ATOMIC); |
2222 | if (!rss_cpu_buf_va) |
2223 | return -ENOMEM; |
2224 | |
2225 | for (i = 0; i < (1 << rss_hash_bits); i++) |
2226 | (*rss_cpu_buf_va).cpu[i/4].b[i%4] = i % enic->rq_count; |
2227 | |
2228 | spin_lock_bh(lock: &enic->devcmd_lock); |
2229 | err = enic_set_rss_cpu(enic, |
2230 | cpu_pa: rss_cpu_buf_pa, |
2231 | len: sizeof(union vnic_rss_cpu)); |
2232 | spin_unlock_bh(lock: &enic->devcmd_lock); |
2233 | |
2234 | dma_free_coherent(dev: &enic->pdev->dev, size: sizeof(union vnic_rss_cpu), |
2235 | cpu_addr: rss_cpu_buf_va, dma_handle: rss_cpu_buf_pa); |
2236 | |
2237 | return err; |
2238 | } |
2239 | |
2240 | static int enic_set_niccfg(struct enic *enic, u8 , |
2241 | u8 , u8 , u8 , u8 ) |
2242 | { |
2243 | const u8 tso_ipid_split_en = 0; |
2244 | const u8 ig_vlan_strip_en = 1; |
2245 | int err; |
2246 | |
2247 | /* Enable VLAN tag stripping. |
2248 | */ |
2249 | |
2250 | spin_lock_bh(lock: &enic->devcmd_lock); |
2251 | err = enic_set_nic_cfg(enic, |
2252 | rss_default_cpu, rss_hash_type, |
2253 | rss_hash_bits, rss_base_cpu, |
2254 | rss_enable, tso_ipid_split_en, |
2255 | ig_vlan_strip_en); |
2256 | spin_unlock_bh(lock: &enic->devcmd_lock); |
2257 | |
2258 | return err; |
2259 | } |
2260 | |
2261 | static int (struct enic *enic) |
2262 | { |
2263 | struct device *dev = enic_get_dev(enic); |
2264 | const u8 = 0; |
2265 | const u8 = 7; |
2266 | const u8 = 0; |
2267 | u8 ; |
2268 | int res; |
2269 | u8 = ENIC_SETTING(enic, RSS) && (enic->rq_count > 1); |
2270 | |
2271 | spin_lock_bh(lock: &enic->devcmd_lock); |
2272 | res = vnic_dev_capable_rss_hash_type(vdev: enic->vdev, rss_hash_type: &rss_hash_type); |
2273 | spin_unlock_bh(lock: &enic->devcmd_lock); |
2274 | if (res) { |
2275 | /* defaults for old adapters |
2276 | */ |
2277 | rss_hash_type = NIC_CFG_RSS_HASH_TYPE_IPV4 | |
2278 | NIC_CFG_RSS_HASH_TYPE_TCP_IPV4 | |
2279 | NIC_CFG_RSS_HASH_TYPE_IPV6 | |
2280 | NIC_CFG_RSS_HASH_TYPE_TCP_IPV6; |
2281 | } |
2282 | |
2283 | if (rss_enable) { |
2284 | if (!enic_set_rsskey(enic)) { |
2285 | if (enic_set_rsscpu(enic, rss_hash_bits)) { |
2286 | rss_enable = 0; |
2287 | dev_warn(dev, "RSS disabled, " |
2288 | "Failed to set RSS cpu indirection table." ); |
2289 | } |
2290 | } else { |
2291 | rss_enable = 0; |
2292 | dev_warn(dev, "RSS disabled, Failed to set RSS key.\n" ); |
2293 | } |
2294 | } |
2295 | |
2296 | return enic_set_niccfg(enic, rss_default_cpu, rss_hash_type, |
2297 | rss_hash_bits, rss_base_cpu, rss_enable); |
2298 | } |
2299 | |
2300 | static void enic_set_api_busy(struct enic *enic, bool busy) |
2301 | { |
2302 | spin_lock(lock: &enic->enic_api_lock); |
2303 | enic->enic_api_busy = busy; |
2304 | spin_unlock(lock: &enic->enic_api_lock); |
2305 | } |
2306 | |
2307 | static void enic_reset(struct work_struct *work) |
2308 | { |
2309 | struct enic *enic = container_of(work, struct enic, reset); |
2310 | |
2311 | if (!netif_running(dev: enic->netdev)) |
2312 | return; |
2313 | |
2314 | rtnl_lock(); |
2315 | |
2316 | /* Stop any activity from infiniband */ |
2317 | enic_set_api_busy(enic, busy: true); |
2318 | |
2319 | enic_stop(netdev: enic->netdev); |
2320 | enic_dev_soft_reset(enic); |
2321 | enic_reset_addr_lists(enic); |
2322 | enic_init_vnic_resources(enic); |
2323 | enic_set_rss_nic_cfg(enic); |
2324 | enic_dev_set_ig_vlan_rewrite_mode(enic); |
2325 | enic_open(netdev: enic->netdev); |
2326 | |
2327 | /* Allow infiniband to fiddle with the device again */ |
2328 | enic_set_api_busy(enic, busy: false); |
2329 | |
2330 | call_netdevice_notifiers(val: NETDEV_REBOOT, dev: enic->netdev); |
2331 | |
2332 | rtnl_unlock(); |
2333 | } |
2334 | |
2335 | static void enic_tx_hang_reset(struct work_struct *work) |
2336 | { |
2337 | struct enic *enic = container_of(work, struct enic, tx_hang_reset); |
2338 | |
2339 | rtnl_lock(); |
2340 | |
2341 | /* Stop any activity from infiniband */ |
2342 | enic_set_api_busy(enic, busy: true); |
2343 | |
2344 | enic_dev_hang_notify(enic); |
2345 | enic_stop(netdev: enic->netdev); |
2346 | enic_dev_hang_reset(enic); |
2347 | enic_reset_addr_lists(enic); |
2348 | enic_init_vnic_resources(enic); |
2349 | enic_set_rss_nic_cfg(enic); |
2350 | enic_dev_set_ig_vlan_rewrite_mode(enic); |
2351 | enic_open(netdev: enic->netdev); |
2352 | |
2353 | /* Allow infiniband to fiddle with the device again */ |
2354 | enic_set_api_busy(enic, busy: false); |
2355 | |
2356 | call_netdevice_notifiers(val: NETDEV_REBOOT, dev: enic->netdev); |
2357 | |
2358 | rtnl_unlock(); |
2359 | } |
2360 | |
2361 | static int enic_set_intr_mode(struct enic *enic) |
2362 | { |
2363 | unsigned int n = min_t(unsigned int, enic->rq_count, ENIC_RQ_MAX); |
2364 | unsigned int m = min_t(unsigned int, enic->wq_count, ENIC_WQ_MAX); |
2365 | unsigned int i; |
2366 | |
2367 | /* Set interrupt mode (INTx, MSI, MSI-X) depending |
2368 | * on system capabilities. |
2369 | * |
2370 | * Try MSI-X first |
2371 | * |
2372 | * We need n RQs, m WQs, n+m CQs, and n+m+2 INTRs |
2373 | * (the second to last INTR is used for WQ/RQ errors) |
2374 | * (the last INTR is used for notifications) |
2375 | */ |
2376 | |
2377 | BUG_ON(ARRAY_SIZE(enic->msix_entry) < n + m + 2); |
2378 | for (i = 0; i < n + m + 2; i++) |
2379 | enic->msix_entry[i].entry = i; |
2380 | |
2381 | /* Use multiple RQs if RSS is enabled |
2382 | */ |
2383 | |
2384 | if (ENIC_SETTING(enic, RSS) && |
2385 | enic->config.intr_mode < 1 && |
2386 | enic->rq_count >= n && |
2387 | enic->wq_count >= m && |
2388 | enic->cq_count >= n + m && |
2389 | enic->intr_count >= n + m + 2) { |
2390 | |
2391 | if (pci_enable_msix_range(dev: enic->pdev, entries: enic->msix_entry, |
2392 | minvec: n + m + 2, maxvec: n + m + 2) > 0) { |
2393 | |
2394 | enic->rq_count = n; |
2395 | enic->wq_count = m; |
2396 | enic->cq_count = n + m; |
2397 | enic->intr_count = n + m + 2; |
2398 | |
2399 | vnic_dev_set_intr_mode(vdev: enic->vdev, |
2400 | intr_mode: VNIC_DEV_INTR_MODE_MSIX); |
2401 | |
2402 | return 0; |
2403 | } |
2404 | } |
2405 | |
2406 | if (enic->config.intr_mode < 1 && |
2407 | enic->rq_count >= 1 && |
2408 | enic->wq_count >= m && |
2409 | enic->cq_count >= 1 + m && |
2410 | enic->intr_count >= 1 + m + 2) { |
2411 | if (pci_enable_msix_range(dev: enic->pdev, entries: enic->msix_entry, |
2412 | minvec: 1 + m + 2, maxvec: 1 + m + 2) > 0) { |
2413 | |
2414 | enic->rq_count = 1; |
2415 | enic->wq_count = m; |
2416 | enic->cq_count = 1 + m; |
2417 | enic->intr_count = 1 + m + 2; |
2418 | |
2419 | vnic_dev_set_intr_mode(vdev: enic->vdev, |
2420 | intr_mode: VNIC_DEV_INTR_MODE_MSIX); |
2421 | |
2422 | return 0; |
2423 | } |
2424 | } |
2425 | |
2426 | /* Next try MSI |
2427 | * |
2428 | * We need 1 RQ, 1 WQ, 2 CQs, and 1 INTR |
2429 | */ |
2430 | |
2431 | if (enic->config.intr_mode < 2 && |
2432 | enic->rq_count >= 1 && |
2433 | enic->wq_count >= 1 && |
2434 | enic->cq_count >= 2 && |
2435 | enic->intr_count >= 1 && |
2436 | !pci_enable_msi(dev: enic->pdev)) { |
2437 | |
2438 | enic->rq_count = 1; |
2439 | enic->wq_count = 1; |
2440 | enic->cq_count = 2; |
2441 | enic->intr_count = 1; |
2442 | |
2443 | vnic_dev_set_intr_mode(vdev: enic->vdev, intr_mode: VNIC_DEV_INTR_MODE_MSI); |
2444 | |
2445 | return 0; |
2446 | } |
2447 | |
2448 | /* Next try INTx |
2449 | * |
2450 | * We need 1 RQ, 1 WQ, 2 CQs, and 3 INTRs |
2451 | * (the first INTR is used for WQ/RQ) |
2452 | * (the second INTR is used for WQ/RQ errors) |
2453 | * (the last INTR is used for notifications) |
2454 | */ |
2455 | |
2456 | if (enic->config.intr_mode < 3 && |
2457 | enic->rq_count >= 1 && |
2458 | enic->wq_count >= 1 && |
2459 | enic->cq_count >= 2 && |
2460 | enic->intr_count >= 3) { |
2461 | |
2462 | enic->rq_count = 1; |
2463 | enic->wq_count = 1; |
2464 | enic->cq_count = 2; |
2465 | enic->intr_count = 3; |
2466 | |
2467 | vnic_dev_set_intr_mode(vdev: enic->vdev, intr_mode: VNIC_DEV_INTR_MODE_INTX); |
2468 | |
2469 | return 0; |
2470 | } |
2471 | |
2472 | vnic_dev_set_intr_mode(vdev: enic->vdev, intr_mode: VNIC_DEV_INTR_MODE_UNKNOWN); |
2473 | |
2474 | return -EINVAL; |
2475 | } |
2476 | |
2477 | static void enic_clear_intr_mode(struct enic *enic) |
2478 | { |
2479 | switch (vnic_dev_get_intr_mode(vdev: enic->vdev)) { |
2480 | case VNIC_DEV_INTR_MODE_MSIX: |
2481 | pci_disable_msix(dev: enic->pdev); |
2482 | break; |
2483 | case VNIC_DEV_INTR_MODE_MSI: |
2484 | pci_disable_msi(dev: enic->pdev); |
2485 | break; |
2486 | default: |
2487 | break; |
2488 | } |
2489 | |
2490 | vnic_dev_set_intr_mode(vdev: enic->vdev, intr_mode: VNIC_DEV_INTR_MODE_UNKNOWN); |
2491 | } |
2492 | |
2493 | static const struct net_device_ops enic_netdev_dynamic_ops = { |
2494 | .ndo_open = enic_open, |
2495 | .ndo_stop = enic_stop, |
2496 | .ndo_start_xmit = enic_hard_start_xmit, |
2497 | .ndo_get_stats64 = enic_get_stats, |
2498 | .ndo_validate_addr = eth_validate_addr, |
2499 | .ndo_set_rx_mode = enic_set_rx_mode, |
2500 | .ndo_set_mac_address = enic_set_mac_address_dynamic, |
2501 | .ndo_change_mtu = enic_change_mtu, |
2502 | .ndo_vlan_rx_add_vid = enic_vlan_rx_add_vid, |
2503 | .ndo_vlan_rx_kill_vid = enic_vlan_rx_kill_vid, |
2504 | .ndo_tx_timeout = enic_tx_timeout, |
2505 | .ndo_set_vf_port = enic_set_vf_port, |
2506 | .ndo_get_vf_port = enic_get_vf_port, |
2507 | .ndo_set_vf_mac = enic_set_vf_mac, |
2508 | #ifdef CONFIG_NET_POLL_CONTROLLER |
2509 | .ndo_poll_controller = enic_poll_controller, |
2510 | #endif |
2511 | #ifdef CONFIG_RFS_ACCEL |
2512 | .ndo_rx_flow_steer = enic_rx_flow_steer, |
2513 | #endif |
2514 | .ndo_features_check = enic_features_check, |
2515 | }; |
2516 | |
2517 | static const struct net_device_ops enic_netdev_ops = { |
2518 | .ndo_open = enic_open, |
2519 | .ndo_stop = enic_stop, |
2520 | .ndo_start_xmit = enic_hard_start_xmit, |
2521 | .ndo_get_stats64 = enic_get_stats, |
2522 | .ndo_validate_addr = eth_validate_addr, |
2523 | .ndo_set_mac_address = enic_set_mac_address, |
2524 | .ndo_set_rx_mode = enic_set_rx_mode, |
2525 | .ndo_change_mtu = enic_change_mtu, |
2526 | .ndo_vlan_rx_add_vid = enic_vlan_rx_add_vid, |
2527 | .ndo_vlan_rx_kill_vid = enic_vlan_rx_kill_vid, |
2528 | .ndo_tx_timeout = enic_tx_timeout, |
2529 | .ndo_set_vf_port = enic_set_vf_port, |
2530 | .ndo_get_vf_port = enic_get_vf_port, |
2531 | .ndo_set_vf_mac = enic_set_vf_mac, |
2532 | #ifdef CONFIG_NET_POLL_CONTROLLER |
2533 | .ndo_poll_controller = enic_poll_controller, |
2534 | #endif |
2535 | #ifdef CONFIG_RFS_ACCEL |
2536 | .ndo_rx_flow_steer = enic_rx_flow_steer, |
2537 | #endif |
2538 | .ndo_features_check = enic_features_check, |
2539 | }; |
2540 | |
2541 | static void enic_dev_deinit(struct enic *enic) |
2542 | { |
2543 | unsigned int i; |
2544 | |
2545 | for (i = 0; i < enic->rq_count; i++) |
2546 | __netif_napi_del(napi: &enic->napi[i]); |
2547 | |
2548 | if (vnic_dev_get_intr_mode(vdev: enic->vdev) == VNIC_DEV_INTR_MODE_MSIX) |
2549 | for (i = 0; i < enic->wq_count; i++) |
2550 | __netif_napi_del(napi: &enic->napi[enic_cq_wq(enic, wq: i)]); |
2551 | |
2552 | /* observe RCU grace period after __netif_napi_del() calls */ |
2553 | synchronize_net(); |
2554 | |
2555 | enic_free_vnic_resources(enic); |
2556 | enic_clear_intr_mode(enic); |
2557 | enic_free_affinity_hint(enic); |
2558 | } |
2559 | |
2560 | static void enic_kdump_kernel_config(struct enic *enic) |
2561 | { |
2562 | if (is_kdump_kernel()) { |
2563 | dev_info(enic_get_dev(enic), "Running from within kdump kernel. Using minimal resources\n" ); |
2564 | enic->rq_count = 1; |
2565 | enic->wq_count = 1; |
2566 | enic->config.rq_desc_count = ENIC_MIN_RQ_DESCS; |
2567 | enic->config.wq_desc_count = ENIC_MIN_WQ_DESCS; |
2568 | enic->config.mtu = min_t(u16, 1500, enic->config.mtu); |
2569 | } |
2570 | } |
2571 | |
2572 | static int enic_dev_init(struct enic *enic) |
2573 | { |
2574 | struct device *dev = enic_get_dev(enic); |
2575 | struct net_device *netdev = enic->netdev; |
2576 | unsigned int i; |
2577 | int err; |
2578 | |
2579 | /* Get interrupt coalesce timer info */ |
2580 | err = enic_dev_intr_coal_timer_info(enic); |
2581 | if (err) { |
2582 | dev_warn(dev, "Using default conversion factor for " |
2583 | "interrupt coalesce timer\n" ); |
2584 | vnic_dev_intr_coal_timer_info_default(vdev: enic->vdev); |
2585 | } |
2586 | |
2587 | /* Get vNIC configuration |
2588 | */ |
2589 | |
2590 | err = enic_get_vnic_config(enic); |
2591 | if (err) { |
2592 | dev_err(dev, "Get vNIC configuration failed, aborting\n" ); |
2593 | return err; |
2594 | } |
2595 | |
2596 | /* Get available resource counts |
2597 | */ |
2598 | |
2599 | enic_get_res_counts(enic); |
2600 | |
2601 | /* modify resource count if we are in kdump_kernel |
2602 | */ |
2603 | enic_kdump_kernel_config(enic); |
2604 | |
2605 | /* Set interrupt mode based on resource counts and system |
2606 | * capabilities |
2607 | */ |
2608 | |
2609 | err = enic_set_intr_mode(enic); |
2610 | if (err) { |
2611 | dev_err(dev, "Failed to set intr mode based on resource " |
2612 | "counts and system capabilities, aborting\n" ); |
2613 | return err; |
2614 | } |
2615 | |
2616 | /* Allocate and configure vNIC resources |
2617 | */ |
2618 | |
2619 | err = enic_alloc_vnic_resources(enic); |
2620 | if (err) { |
2621 | dev_err(dev, "Failed to alloc vNIC resources, aborting\n" ); |
2622 | goto err_out_free_vnic_resources; |
2623 | } |
2624 | |
2625 | enic_init_vnic_resources(enic); |
2626 | |
2627 | err = enic_set_rss_nic_cfg(enic); |
2628 | if (err) { |
2629 | dev_err(dev, "Failed to config nic, aborting\n" ); |
2630 | goto err_out_free_vnic_resources; |
2631 | } |
2632 | |
2633 | switch (vnic_dev_get_intr_mode(vdev: enic->vdev)) { |
2634 | default: |
2635 | netif_napi_add(dev: netdev, napi: &enic->napi[0], poll: enic_poll); |
2636 | break; |
2637 | case VNIC_DEV_INTR_MODE_MSIX: |
2638 | for (i = 0; i < enic->rq_count; i++) { |
2639 | netif_napi_add(dev: netdev, napi: &enic->napi[i], |
2640 | poll: enic_poll_msix_rq); |
2641 | } |
2642 | for (i = 0; i < enic->wq_count; i++) |
2643 | netif_napi_add(dev: netdev, |
2644 | napi: &enic->napi[enic_cq_wq(enic, wq: i)], |
2645 | poll: enic_poll_msix_wq); |
2646 | break; |
2647 | } |
2648 | |
2649 | return 0; |
2650 | |
2651 | err_out_free_vnic_resources: |
2652 | enic_free_affinity_hint(enic); |
2653 | enic_clear_intr_mode(enic); |
2654 | enic_free_vnic_resources(enic); |
2655 | |
2656 | return err; |
2657 | } |
2658 | |
2659 | static void enic_iounmap(struct enic *enic) |
2660 | { |
2661 | unsigned int i; |
2662 | |
2663 | for (i = 0; i < ARRAY_SIZE(enic->bar); i++) |
2664 | if (enic->bar[i].vaddr) |
2665 | iounmap(addr: enic->bar[i].vaddr); |
2666 | } |
2667 | |
2668 | static int enic_probe(struct pci_dev *pdev, const struct pci_device_id *ent) |
2669 | { |
2670 | struct device *dev = &pdev->dev; |
2671 | struct net_device *netdev; |
2672 | struct enic *enic; |
2673 | int using_dac = 0; |
2674 | unsigned int i; |
2675 | int err; |
2676 | #ifdef CONFIG_PCI_IOV |
2677 | int pos = 0; |
2678 | #endif |
2679 | int num_pps = 1; |
2680 | |
2681 | /* Allocate net device structure and initialize. Private |
2682 | * instance data is initialized to zero. |
2683 | */ |
2684 | |
2685 | netdev = alloc_etherdev_mqs(sizeof_priv: sizeof(struct enic), |
2686 | ENIC_RQ_MAX, ENIC_WQ_MAX); |
2687 | if (!netdev) |
2688 | return -ENOMEM; |
2689 | |
2690 | pci_set_drvdata(pdev, data: netdev); |
2691 | |
2692 | SET_NETDEV_DEV(netdev, &pdev->dev); |
2693 | |
2694 | enic = netdev_priv(dev: netdev); |
2695 | enic->netdev = netdev; |
2696 | enic->pdev = pdev; |
2697 | |
2698 | /* Setup PCI resources |
2699 | */ |
2700 | |
2701 | err = pci_enable_device_mem(dev: pdev); |
2702 | if (err) { |
2703 | dev_err(dev, "Cannot enable PCI device, aborting\n" ); |
2704 | goto err_out_free_netdev; |
2705 | } |
2706 | |
2707 | err = pci_request_regions(pdev, DRV_NAME); |
2708 | if (err) { |
2709 | dev_err(dev, "Cannot request PCI regions, aborting\n" ); |
2710 | goto err_out_disable_device; |
2711 | } |
2712 | |
2713 | pci_set_master(dev: pdev); |
2714 | |
2715 | /* Query PCI controller on system for DMA addressing |
2716 | * limitation for the device. Try 47-bit first, and |
2717 | * fail to 32-bit. |
2718 | */ |
2719 | |
2720 | err = dma_set_mask_and_coherent(dev: &pdev->dev, DMA_BIT_MASK(47)); |
2721 | if (err) { |
2722 | err = dma_set_mask_and_coherent(dev: &pdev->dev, DMA_BIT_MASK(32)); |
2723 | if (err) { |
2724 | dev_err(dev, "No usable DMA configuration, aborting\n" ); |
2725 | goto err_out_release_regions; |
2726 | } |
2727 | } else { |
2728 | using_dac = 1; |
2729 | } |
2730 | |
2731 | /* Map vNIC resources from BAR0-5 |
2732 | */ |
2733 | |
2734 | for (i = 0; i < ARRAY_SIZE(enic->bar); i++) { |
2735 | if (!(pci_resource_flags(pdev, i) & IORESOURCE_MEM)) |
2736 | continue; |
2737 | enic->bar[i].len = pci_resource_len(pdev, i); |
2738 | enic->bar[i].vaddr = pci_iomap(dev: pdev, bar: i, max: enic->bar[i].len); |
2739 | if (!enic->bar[i].vaddr) { |
2740 | dev_err(dev, "Cannot memory-map BAR %d, aborting\n" , i); |
2741 | err = -ENODEV; |
2742 | goto err_out_iounmap; |
2743 | } |
2744 | enic->bar[i].bus_addr = pci_resource_start(pdev, i); |
2745 | } |
2746 | |
2747 | /* Register vNIC device |
2748 | */ |
2749 | |
2750 | enic->vdev = vnic_dev_register(NULL, priv: enic, pdev, bar: enic->bar, |
2751 | ARRAY_SIZE(enic->bar)); |
2752 | if (!enic->vdev) { |
2753 | dev_err(dev, "vNIC registration failed, aborting\n" ); |
2754 | err = -ENODEV; |
2755 | goto err_out_iounmap; |
2756 | } |
2757 | |
2758 | err = vnic_devcmd_init(vdev: enic->vdev); |
2759 | |
2760 | if (err) |
2761 | goto err_out_vnic_unregister; |
2762 | |
2763 | #ifdef CONFIG_PCI_IOV |
2764 | /* Get number of subvnics */ |
2765 | pos = pci_find_ext_capability(dev: pdev, PCI_EXT_CAP_ID_SRIOV); |
2766 | if (pos) { |
2767 | pci_read_config_word(dev: pdev, where: pos + PCI_SRIOV_TOTAL_VF, |
2768 | val: &enic->num_vfs); |
2769 | if (enic->num_vfs) { |
2770 | err = pci_enable_sriov(dev: pdev, nr_virtfn: enic->num_vfs); |
2771 | if (err) { |
2772 | dev_err(dev, "SRIOV enable failed, aborting." |
2773 | " pci_enable_sriov() returned %d\n" , |
2774 | err); |
2775 | goto err_out_vnic_unregister; |
2776 | } |
2777 | enic->priv_flags |= ENIC_SRIOV_ENABLED; |
2778 | num_pps = enic->num_vfs; |
2779 | } |
2780 | } |
2781 | #endif |
2782 | |
2783 | /* Allocate structure for port profiles */ |
2784 | enic->pp = kcalloc(n: num_pps, size: sizeof(*enic->pp), GFP_KERNEL); |
2785 | if (!enic->pp) { |
2786 | err = -ENOMEM; |
2787 | goto err_out_disable_sriov_pp; |
2788 | } |
2789 | |
2790 | /* Issue device open to get device in known state |
2791 | */ |
2792 | |
2793 | err = enic_dev_open(enic); |
2794 | if (err) { |
2795 | dev_err(dev, "vNIC dev open failed, aborting\n" ); |
2796 | goto err_out_disable_sriov; |
2797 | } |
2798 | |
2799 | /* Setup devcmd lock |
2800 | */ |
2801 | |
2802 | spin_lock_init(&enic->devcmd_lock); |
2803 | spin_lock_init(&enic->enic_api_lock); |
2804 | |
2805 | /* |
2806 | * Set ingress vlan rewrite mode before vnic initialization |
2807 | */ |
2808 | |
2809 | err = enic_dev_set_ig_vlan_rewrite_mode(enic); |
2810 | if (err) { |
2811 | dev_err(dev, |
2812 | "Failed to set ingress vlan rewrite mode, aborting.\n" ); |
2813 | goto err_out_dev_close; |
2814 | } |
2815 | |
2816 | /* Issue device init to initialize the vnic-to-switch link. |
2817 | * We'll start with carrier off and wait for link UP |
2818 | * notification later to turn on carrier. We don't need |
2819 | * to wait here for the vnic-to-switch link initialization |
2820 | * to complete; link UP notification is the indication that |
2821 | * the process is complete. |
2822 | */ |
2823 | |
2824 | netif_carrier_off(dev: netdev); |
2825 | |
2826 | /* Do not call dev_init for a dynamic vnic. |
2827 | * For a dynamic vnic, init_prov_info will be |
2828 | * called later by an upper layer. |
2829 | */ |
2830 | |
2831 | if (!enic_is_dynamic(enic)) { |
2832 | err = vnic_dev_init(vdev: enic->vdev, arg: 0); |
2833 | if (err) { |
2834 | dev_err(dev, "vNIC dev init failed, aborting\n" ); |
2835 | goto err_out_dev_close; |
2836 | } |
2837 | } |
2838 | |
2839 | err = enic_dev_init(enic); |
2840 | if (err) { |
2841 | dev_err(dev, "Device initialization failed, aborting\n" ); |
2842 | goto err_out_dev_close; |
2843 | } |
2844 | |
2845 | netif_set_real_num_tx_queues(dev: netdev, txq: enic->wq_count); |
2846 | netif_set_real_num_rx_queues(dev: netdev, rxq: enic->rq_count); |
2847 | |
2848 | /* Setup notification timer, HW reset task, and wq locks |
2849 | */ |
2850 | |
2851 | timer_setup(&enic->notify_timer, enic_notify_timer, 0); |
2852 | |
2853 | enic_rfs_flw_tbl_init(enic); |
2854 | enic_set_rx_coal_setting(enic); |
2855 | INIT_WORK(&enic->reset, enic_reset); |
2856 | INIT_WORK(&enic->tx_hang_reset, enic_tx_hang_reset); |
2857 | INIT_WORK(&enic->change_mtu_work, enic_change_mtu_work); |
2858 | |
2859 | for (i = 0; i < enic->wq_count; i++) |
2860 | spin_lock_init(&enic->wq_lock[i]); |
2861 | |
2862 | /* Register net device |
2863 | */ |
2864 | |
2865 | enic->port_mtu = enic->config.mtu; |
2866 | |
2867 | err = enic_set_mac_addr(netdev, addr: enic->mac_addr); |
2868 | if (err) { |
2869 | dev_err(dev, "Invalid MAC address, aborting\n" ); |
2870 | goto err_out_dev_deinit; |
2871 | } |
2872 | |
2873 | enic->tx_coalesce_usecs = enic->config.intr_timer_usec; |
2874 | /* rx coalesce time already got initialized. This gets used |
2875 | * if adaptive coal is turned off |
2876 | */ |
2877 | enic->rx_coalesce_usecs = enic->tx_coalesce_usecs; |
2878 | |
2879 | if (enic_is_dynamic(enic) || enic_is_sriov_vf(enic)) |
2880 | netdev->netdev_ops = &enic_netdev_dynamic_ops; |
2881 | else |
2882 | netdev->netdev_ops = &enic_netdev_ops; |
2883 | |
2884 | netdev->watchdog_timeo = 2 * HZ; |
2885 | enic_set_ethtool_ops(netdev); |
2886 | |
2887 | netdev->features |= NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_CTAG_RX; |
2888 | if (ENIC_SETTING(enic, LOOP)) { |
2889 | netdev->features &= ~NETIF_F_HW_VLAN_CTAG_TX; |
2890 | enic->loop_enable = 1; |
2891 | enic->loop_tag = enic->config.loop_tag; |
2892 | dev_info(dev, "loopback tag=0x%04x\n" , enic->loop_tag); |
2893 | } |
2894 | if (ENIC_SETTING(enic, TXCSUM)) |
2895 | netdev->hw_features |= NETIF_F_SG | NETIF_F_HW_CSUM; |
2896 | if (ENIC_SETTING(enic, TSO)) |
2897 | netdev->hw_features |= NETIF_F_TSO | |
2898 | NETIF_F_TSO6 | NETIF_F_TSO_ECN; |
2899 | if (ENIC_SETTING(enic, RSS)) |
2900 | netdev->hw_features |= NETIF_F_RXHASH; |
2901 | if (ENIC_SETTING(enic, RXCSUM)) |
2902 | netdev->hw_features |= NETIF_F_RXCSUM; |
2903 | if (ENIC_SETTING(enic, VXLAN)) { |
2904 | u64 patch_level; |
2905 | u64 a1 = 0; |
2906 | |
2907 | netdev->hw_enc_features |= NETIF_F_RXCSUM | |
2908 | NETIF_F_TSO | |
2909 | NETIF_F_TSO6 | |
2910 | NETIF_F_TSO_ECN | |
2911 | NETIF_F_GSO_UDP_TUNNEL | |
2912 | NETIF_F_HW_CSUM | |
2913 | NETIF_F_GSO_UDP_TUNNEL_CSUM; |
2914 | netdev->hw_features |= netdev->hw_enc_features; |
2915 | /* get bit mask from hw about supported offload bit level |
2916 | * BIT(0) = fw supports patch_level 0 |
2917 | * fcoe bit = encap |
2918 | * fcoe_fc_crc_ok = outer csum ok |
2919 | * BIT(1) = always set by fw |
2920 | * BIT(2) = fw supports patch_level 2 |
2921 | * BIT(0) in rss_hash = encap |
2922 | * BIT(1,2) in rss_hash = outer_ip_csum_ok/ |
2923 | * outer_tcp_csum_ok |
2924 | * used in enic_rq_indicate_buf |
2925 | */ |
2926 | err = vnic_dev_get_supported_feature_ver(vdev: enic->vdev, |
2927 | feature: VIC_FEATURE_VXLAN, |
2928 | supported_versions: &patch_level, a1: &a1); |
2929 | if (err) |
2930 | patch_level = 0; |
2931 | enic->vxlan.flags = (u8)a1; |
2932 | /* mask bits that are supported by driver |
2933 | */ |
2934 | patch_level &= BIT_ULL(0) | BIT_ULL(2); |
2935 | patch_level = fls(x: patch_level); |
2936 | patch_level = patch_level ? patch_level - 1 : 0; |
2937 | enic->vxlan.patch_level = patch_level; |
2938 | |
2939 | if (vnic_dev_get_res_count(vdev: enic->vdev, type: RES_TYPE_WQ) == 1 || |
2940 | enic->vxlan.flags & ENIC_VXLAN_MULTI_WQ) { |
2941 | netdev->udp_tunnel_nic_info = &enic_udp_tunnels_v4; |
2942 | if (enic->vxlan.flags & ENIC_VXLAN_OUTER_IPV6) |
2943 | netdev->udp_tunnel_nic_info = &enic_udp_tunnels; |
2944 | } |
2945 | } |
2946 | |
2947 | netdev->features |= netdev->hw_features; |
2948 | netdev->vlan_features |= netdev->features; |
2949 | |
2950 | #ifdef CONFIG_RFS_ACCEL |
2951 | netdev->hw_features |= NETIF_F_NTUPLE; |
2952 | #endif |
2953 | |
2954 | if (using_dac) |
2955 | netdev->features |= NETIF_F_HIGHDMA; |
2956 | |
2957 | netdev->priv_flags |= IFF_UNICAST_FLT; |
2958 | |
2959 | /* MTU range: 68 - 9000 */ |
2960 | netdev->min_mtu = ENIC_MIN_MTU; |
2961 | netdev->max_mtu = ENIC_MAX_MTU; |
2962 | netdev->mtu = enic->port_mtu; |
2963 | |
2964 | err = register_netdev(dev: netdev); |
2965 | if (err) { |
2966 | dev_err(dev, "Cannot register net device, aborting\n" ); |
2967 | goto err_out_dev_deinit; |
2968 | } |
2969 | enic->rx_copybreak = RX_COPYBREAK_DEFAULT; |
2970 | |
2971 | return 0; |
2972 | |
2973 | err_out_dev_deinit: |
2974 | enic_dev_deinit(enic); |
2975 | err_out_dev_close: |
2976 | vnic_dev_close(vdev: enic->vdev); |
2977 | err_out_disable_sriov: |
2978 | kfree(objp: enic->pp); |
2979 | err_out_disable_sriov_pp: |
2980 | #ifdef CONFIG_PCI_IOV |
2981 | if (enic_sriov_enabled(enic)) { |
2982 | pci_disable_sriov(dev: pdev); |
2983 | enic->priv_flags &= ~ENIC_SRIOV_ENABLED; |
2984 | } |
2985 | #endif |
2986 | err_out_vnic_unregister: |
2987 | vnic_dev_unregister(vdev: enic->vdev); |
2988 | err_out_iounmap: |
2989 | enic_iounmap(enic); |
2990 | err_out_release_regions: |
2991 | pci_release_regions(pdev); |
2992 | err_out_disable_device: |
2993 | pci_disable_device(dev: pdev); |
2994 | err_out_free_netdev: |
2995 | free_netdev(dev: netdev); |
2996 | |
2997 | return err; |
2998 | } |
2999 | |
3000 | static void enic_remove(struct pci_dev *pdev) |
3001 | { |
3002 | struct net_device *netdev = pci_get_drvdata(pdev); |
3003 | |
3004 | if (netdev) { |
3005 | struct enic *enic = netdev_priv(dev: netdev); |
3006 | |
3007 | cancel_work_sync(work: &enic->reset); |
3008 | cancel_work_sync(work: &enic->change_mtu_work); |
3009 | unregister_netdev(dev: netdev); |
3010 | enic_dev_deinit(enic); |
3011 | vnic_dev_close(vdev: enic->vdev); |
3012 | #ifdef CONFIG_PCI_IOV |
3013 | if (enic_sriov_enabled(enic)) { |
3014 | pci_disable_sriov(dev: pdev); |
3015 | enic->priv_flags &= ~ENIC_SRIOV_ENABLED; |
3016 | } |
3017 | #endif |
3018 | kfree(objp: enic->pp); |
3019 | vnic_dev_unregister(vdev: enic->vdev); |
3020 | enic_iounmap(enic); |
3021 | pci_release_regions(pdev); |
3022 | pci_disable_device(dev: pdev); |
3023 | free_netdev(dev: netdev); |
3024 | } |
3025 | } |
3026 | |
3027 | static struct pci_driver enic_driver = { |
3028 | .name = DRV_NAME, |
3029 | .id_table = enic_id_table, |
3030 | .probe = enic_probe, |
3031 | .remove = enic_remove, |
3032 | }; |
3033 | |
3034 | module_pci_driver(enic_driver); |
3035 | |