1 // SPDX-License-Identifier: GPL-2.0-only
2 /****************************************************************************
3 * Driver for Solarflare network controllers and boards
4 * Copyright 2018 Solarflare Communications Inc.
5 * Copyright 2019-2020 Xilinx Inc.
6 *
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License version 2 as published
9 * by the Free Software Foundation, incorporated herein by reference.
10 */
11 #include "net_driver.h"
12 #include "mcdi_port_common.h"
13 #include "mcdi_functions.h"
14 #include "efx_common.h"
15 #include "efx_channels.h"
16 #include "tx_common.h"
17 #include "ef100_netdev.h"
18 #include "ef100_ethtool.h"
19 #include "nic_common.h"
20 #include "ef100_nic.h"
21 #include "ef100_tx.h"
22 #include "ef100_regs.h"
23 #include "mcdi_filters.h"
24 #include "rx_common.h"
25 #include "ef100_sriov.h"
26 #include "tc_bindings.h"
27 #include "efx_devlink.h"
28
ef100_update_name(struct efx_nic * efx)29 static void ef100_update_name(struct efx_nic *efx)
30 {
31 strcpy(efx->name, efx->net_dev->name);
32 }
33
ef100_alloc_vis(struct efx_nic * efx,unsigned int * allocated_vis)34 static int ef100_alloc_vis(struct efx_nic *efx, unsigned int *allocated_vis)
35 {
36 /* EF100 uses a single TXQ per channel, as all checksum offloading
37 * is configured in the TX descriptor, and there is no TX Pacer for
38 * HIGHPRI queues.
39 */
40 unsigned int tx_vis = efx->n_tx_channels + efx->n_extra_tx_channels;
41 unsigned int rx_vis = efx->n_rx_channels;
42 unsigned int min_vis, max_vis;
43
44 EFX_WARN_ON_PARANOID(efx->tx_queues_per_channel != 1);
45
46 tx_vis += efx->n_xdp_channels * efx->xdp_tx_per_channel;
47
48 max_vis = max(rx_vis, tx_vis);
49 /* Currently don't handle resource starvation and only accept
50 * our maximum needs and no less.
51 */
52 min_vis = max_vis;
53
54 return efx_mcdi_alloc_vis(efx, min_vis, max_vis,
55 NULL, allocated_vis);
56 }
57
ef100_remap_bar(struct efx_nic * efx,int max_vis)58 static int ef100_remap_bar(struct efx_nic *efx, int max_vis)
59 {
60 unsigned int uc_mem_map_size;
61 void __iomem *membase;
62
63 efx->max_vis = max_vis;
64 uc_mem_map_size = PAGE_ALIGN(max_vis * efx->vi_stride);
65
66 /* Extend the original UC mapping of the memory BAR */
67 membase = ioremap(efx->membase_phys, uc_mem_map_size);
68 if (!membase) {
69 netif_err(efx, probe, efx->net_dev,
70 "could not extend memory BAR to %x\n",
71 uc_mem_map_size);
72 return -ENOMEM;
73 }
74 iounmap(efx->membase);
75 efx->membase = membase;
76 return 0;
77 }
78
79 /* Context: process, rtnl_lock() held.
80 * Note that the kernel will ignore our return code; this method
81 * should really be a void.
82 */
ef100_net_stop(struct net_device * net_dev)83 static int ef100_net_stop(struct net_device *net_dev)
84 {
85 struct efx_nic *efx = efx_netdev_priv(net_dev);
86
87 netif_dbg(efx, ifdown, efx->net_dev, "closing on CPU %d\n",
88 raw_smp_processor_id());
89
90 efx_detach_reps(efx);
91 netif_stop_queue(net_dev);
92 efx_stop_all(efx);
93 efx_mcdi_mac_fini_stats(efx);
94 efx_disable_interrupts(efx);
95 efx_clear_interrupt_affinity(efx);
96 efx_nic_fini_interrupt(efx);
97 efx_remove_filters(efx);
98 efx_fini_napi(efx);
99 efx_remove_channels(efx);
100 efx_mcdi_free_vis(efx);
101 efx_remove_interrupts(efx);
102
103 efx->state = STATE_NET_DOWN;
104
105 return 0;
106 }
107
108 /* Context: process, rtnl_lock() held. */
ef100_net_open(struct net_device * net_dev)109 static int ef100_net_open(struct net_device *net_dev)
110 {
111 struct efx_nic *efx = efx_netdev_priv(net_dev);
112 unsigned int allocated_vis;
113 int rc;
114
115 ef100_update_name(efx);
116 netif_dbg(efx, ifup, net_dev, "opening device on CPU %d\n",
117 raw_smp_processor_id());
118
119 rc = efx_check_disabled(efx);
120 if (rc)
121 goto fail;
122
123 rc = efx_probe_interrupts(efx);
124 if (rc)
125 goto fail;
126
127 rc = efx_set_channels(efx);
128 if (rc)
129 goto fail;
130
131 rc = efx_mcdi_free_vis(efx);
132 if (rc)
133 goto fail;
134
135 rc = ef100_alloc_vis(efx, &allocated_vis);
136 if (rc)
137 goto fail;
138
139 rc = efx_probe_channels(efx);
140 if (rc)
141 return rc;
142
143 rc = ef100_remap_bar(efx, allocated_vis);
144 if (rc)
145 goto fail;
146
147 efx_init_napi(efx);
148
149 rc = efx_probe_filters(efx);
150 if (rc)
151 goto fail;
152
153 rc = efx_nic_init_interrupt(efx);
154 if (rc)
155 goto fail;
156 efx_set_interrupt_affinity(efx);
157
158 rc = efx_enable_interrupts(efx);
159 if (rc)
160 goto fail;
161
162 /* in case the MC rebooted while we were stopped, consume the change
163 * to the warm reboot count
164 */
165 (void) efx_mcdi_poll_reboot(efx);
166
167 rc = efx_mcdi_mac_init_stats(efx);
168 if (rc)
169 goto fail;
170
171 efx_start_all(efx);
172
173 /* Link state detection is normally event-driven; we have
174 * to poll now because we could have missed a change
175 */
176 mutex_lock(&efx->mac_lock);
177 if (efx_mcdi_phy_poll(efx))
178 efx_link_status_changed(efx);
179 mutex_unlock(&efx->mac_lock);
180
181 efx->state = STATE_NET_UP;
182 if (netif_running(efx->net_dev))
183 efx_attach_reps(efx);
184
185 return 0;
186
187 fail:
188 ef100_net_stop(net_dev);
189 return rc;
190 }
191
192 /* Initiate a packet transmission. We use one channel per CPU
193 * (sharing when we have more CPUs than channels).
194 *
195 * Context: non-blocking.
196 * Note that returning anything other than NETDEV_TX_OK will cause the
197 * OS to free the skb.
198 */
ef100_hard_start_xmit(struct sk_buff * skb,struct net_device * net_dev)199 static netdev_tx_t ef100_hard_start_xmit(struct sk_buff *skb,
200 struct net_device *net_dev)
201 {
202 struct efx_nic *efx = efx_netdev_priv(net_dev);
203
204 return __ef100_hard_start_xmit(skb, efx, net_dev, NULL);
205 }
206
__ef100_hard_start_xmit(struct sk_buff * skb,struct efx_nic * efx,struct net_device * net_dev,struct efx_rep * efv)207 netdev_tx_t __ef100_hard_start_xmit(struct sk_buff *skb,
208 struct efx_nic *efx,
209 struct net_device *net_dev,
210 struct efx_rep *efv)
211 {
212 struct efx_tx_queue *tx_queue;
213 struct efx_channel *channel;
214 int rc;
215
216 channel = efx_get_tx_channel(efx, skb_get_queue_mapping(skb));
217 netif_vdbg(efx, tx_queued, efx->net_dev,
218 "%s len %d data %d channel %d\n", __func__,
219 skb->len, skb->data_len, channel->channel);
220 if (!efx->n_channels || !efx->n_tx_channels || !channel) {
221 netif_stop_queue(net_dev);
222 dev_kfree_skb_any(skb);
223 goto err;
224 }
225
226 tx_queue = &channel->tx_queue[0];
227 rc = __ef100_enqueue_skb(tx_queue, skb, efv);
228 if (rc == 0)
229 return NETDEV_TX_OK;
230
231 err:
232 net_dev->stats.tx_dropped++;
233 return NETDEV_TX_OK;
234 }
235
236 static const struct net_device_ops ef100_netdev_ops = {
237 .ndo_open = ef100_net_open,
238 .ndo_stop = ef100_net_stop,
239 .ndo_start_xmit = ef100_hard_start_xmit,
240 .ndo_tx_timeout = efx_watchdog,
241 .ndo_get_stats64 = efx_net_stats,
242 .ndo_change_mtu = efx_change_mtu,
243 .ndo_validate_addr = eth_validate_addr,
244 .ndo_set_mac_address = efx_set_mac_address,
245 .ndo_set_rx_mode = efx_set_rx_mode, /* Lookout */
246 .ndo_set_features = efx_set_features,
247 .ndo_get_phys_port_id = efx_get_phys_port_id,
248 .ndo_get_phys_port_name = efx_get_phys_port_name,
249 #ifdef CONFIG_RFS_ACCEL
250 .ndo_rx_flow_steer = efx_filter_rfs,
251 #endif
252 #ifdef CONFIG_SFC_SRIOV
253 .ndo_setup_tc = efx_tc_setup,
254 #endif
255 };
256
257 /* Netdev registration
258 */
ef100_netdev_event(struct notifier_block * this,unsigned long event,void * ptr)259 int ef100_netdev_event(struct notifier_block *this,
260 unsigned long event, void *ptr)
261 {
262 struct efx_nic *efx = container_of(this, struct efx_nic, netdev_notifier);
263 struct net_device *net_dev = netdev_notifier_info_to_dev(ptr);
264
265 if (efx->net_dev == net_dev &&
266 (event == NETDEV_CHANGENAME || event == NETDEV_REGISTER))
267 ef100_update_name(efx);
268
269 return NOTIFY_DONE;
270 }
271
ef100_register_netdev(struct efx_nic * efx)272 static int ef100_register_netdev(struct efx_nic *efx)
273 {
274 struct net_device *net_dev = efx->net_dev;
275 int rc;
276
277 net_dev->watchdog_timeo = 5 * HZ;
278 net_dev->irq = efx->pci_dev->irq;
279 net_dev->netdev_ops = &ef100_netdev_ops;
280 net_dev->min_mtu = EFX_MIN_MTU;
281 net_dev->max_mtu = EFX_MAX_MTU;
282 net_dev->ethtool_ops = &ef100_ethtool_ops;
283
284 rtnl_lock();
285
286 rc = dev_alloc_name(net_dev, net_dev->name);
287 if (rc < 0)
288 goto fail_locked;
289 ef100_update_name(efx);
290
291 rc = register_netdevice(net_dev);
292 if (rc)
293 goto fail_locked;
294
295 /* Always start with carrier off; PHY events will detect the link */
296 netif_carrier_off(net_dev);
297
298 efx->state = STATE_NET_DOWN;
299 rtnl_unlock();
300 efx_init_mcdi_logging(efx);
301
302 return 0;
303
304 fail_locked:
305 rtnl_unlock();
306 netif_err(efx, drv, efx->net_dev, "could not register net dev\n");
307 return rc;
308 }
309
ef100_unregister_netdev(struct efx_nic * efx)310 static void ef100_unregister_netdev(struct efx_nic *efx)
311 {
312 if (efx_dev_registered(efx)) {
313 efx_fini_mcdi_logging(efx);
314 efx->state = STATE_PROBED;
315 unregister_netdev(efx->net_dev);
316 }
317 }
318
ef100_remove_netdev(struct efx_probe_data * probe_data)319 void ef100_remove_netdev(struct efx_probe_data *probe_data)
320 {
321 struct efx_nic *efx = &probe_data->efx;
322
323 if (!efx->net_dev)
324 return;
325
326 rtnl_lock();
327 dev_close(efx->net_dev);
328 rtnl_unlock();
329
330 unregister_netdevice_notifier(&efx->netdev_notifier);
331 #if defined(CONFIG_SFC_SRIOV)
332 if (!efx->type->is_vf)
333 efx_ef100_pci_sriov_disable(efx, true);
334 #endif
335
336 efx_fini_devlink_lock(efx);
337 ef100_unregister_netdev(efx);
338
339 #ifdef CONFIG_SFC_SRIOV
340 ef100_pf_unset_devlink_port(efx);
341 efx_fini_tc(efx);
342 #endif
343
344 down_write(&efx->filter_sem);
345 efx_mcdi_filter_table_remove(efx);
346 up_write(&efx->filter_sem);
347 efx_fini_channels(efx);
348 kfree(efx->phy_data);
349 efx->phy_data = NULL;
350
351 efx_fini_devlink_and_unlock(efx);
352
353 free_netdev(efx->net_dev);
354 efx->net_dev = NULL;
355 efx->state = STATE_PROBED;
356 }
357
ef100_probe_netdev(struct efx_probe_data * probe_data)358 int ef100_probe_netdev(struct efx_probe_data *probe_data)
359 {
360 struct efx_nic *efx = &probe_data->efx;
361 struct efx_probe_data **probe_ptr;
362 struct ef100_nic_data *nic_data;
363 struct net_device *net_dev;
364 int rc;
365
366 if (efx->mcdi->fn_flags &
367 (1 << MC_CMD_DRV_ATTACH_EXT_OUT_FLAG_NO_ACTIVE_PORT)) {
368 pci_info(efx->pci_dev, "No network port on this PCI function");
369 return 0;
370 }
371
372 /* Allocate and initialise a struct net_device */
373 net_dev = alloc_etherdev_mq(sizeof(probe_data), EFX_MAX_CORE_TX_QUEUES);
374 if (!net_dev)
375 return -ENOMEM;
376 probe_ptr = netdev_priv(net_dev);
377 *probe_ptr = probe_data;
378 efx->net_dev = net_dev;
379 SET_NETDEV_DEV(net_dev, &efx->pci_dev->dev);
380
381 net_dev->features |= efx->type->offload_features;
382 net_dev->hw_features |= efx->type->offload_features;
383 net_dev->hw_enc_features |= efx->type->offload_features;
384 net_dev->vlan_features |= NETIF_F_HW_CSUM | NETIF_F_SG |
385 NETIF_F_HIGHDMA | NETIF_F_ALL_TSO;
386 netif_set_tso_max_segs(net_dev,
387 ESE_EF100_DP_GZ_TSO_MAX_HDR_NUM_SEGS_DEFAULT);
388 efx->mdio.dev = net_dev;
389
390 rc = efx_ef100_init_datapath_caps(efx);
391 if (rc < 0)
392 goto fail;
393
394 rc = ef100_phy_probe(efx);
395 if (rc)
396 goto fail;
397
398 rc = efx_init_channels(efx);
399 if (rc)
400 goto fail;
401
402 down_write(&efx->filter_sem);
403 rc = ef100_filter_table_probe(efx);
404 up_write(&efx->filter_sem);
405 if (rc)
406 goto fail;
407
408 netdev_rss_key_fill(efx->rss_context.rx_hash_key,
409 sizeof(efx->rss_context.rx_hash_key));
410
411 /* Don't fail init if RSS setup doesn't work. */
412 efx_mcdi_push_default_indir_table(efx, efx->n_rx_channels);
413
414 nic_data = efx->nic_data;
415 rc = ef100_get_mac_address(efx, net_dev->perm_addr, CLIENT_HANDLE_SELF,
416 efx->type->is_vf);
417 if (rc)
418 return rc;
419 /* Assign MAC address */
420 eth_hw_addr_set(net_dev, net_dev->perm_addr);
421 ether_addr_copy(nic_data->port_id, net_dev->perm_addr);
422
423 /* devlink creation, registration and lock */
424 rc = efx_probe_devlink_and_lock(efx);
425 if (rc)
426 pci_info(efx->pci_dev, "devlink registration failed");
427
428 rc = ef100_register_netdev(efx);
429 if (rc)
430 goto fail;
431
432 if (!efx->type->is_vf) {
433 rc = ef100_probe_netdev_pf(efx);
434 if (rc)
435 goto fail;
436 #ifdef CONFIG_SFC_SRIOV
437 ef100_pf_set_devlink_port(efx);
438 #endif
439 }
440
441 efx->netdev_notifier.notifier_call = ef100_netdev_event;
442 rc = register_netdevice_notifier(&efx->netdev_notifier);
443 if (rc) {
444 netif_err(efx, probe, efx->net_dev,
445 "Failed to register netdevice notifier, rc=%d\n", rc);
446 goto fail;
447 }
448
449 efx_probe_devlink_unlock(efx);
450 return rc;
451 fail:
452 #ifdef CONFIG_SFC_SRIOV
453 /* remove devlink port if does exist */
454 ef100_pf_unset_devlink_port(efx);
455 #endif
456 efx_probe_devlink_unlock(efx);
457 return rc;
458 }
459