1 // SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
2 /* Copyright (C) 2015-2018 Netronome Systems, Inc. */
3 
4 /*
5  * nfp_net_main.c
6  * Netronome network device driver: Main entry point
7  * Authors: Jakub Kicinski <jakub.kicinski@netronome.com>
8  *          Alejandro Lucero <alejandro.lucero@netronome.com>
9  *          Jason McMullan <jason.mcmullan@netronome.com>
10  *          Rolf Neugebauer <rolf.neugebauer@netronome.com>
11  */
12 
13 #include <linux/etherdevice.h>
14 #include <linux/kernel.h>
15 #include <linux/init.h>
16 #include <linux/lockdep.h>
17 #include <linux/pci.h>
18 #include <linux/pci_regs.h>
19 #include <linux/random.h>
20 #include <linux/rtnetlink.h>
21 
22 #include "nfpcore/nfp.h"
23 #include "nfpcore/nfp_cpp.h"
24 #include "nfpcore/nfp_dev.h"
25 #include "nfpcore/nfp_nffw.h"
26 #include "nfpcore/nfp_nsp.h"
27 #include "nfpcore/nfp6000_pcie.h"
28 #include "nfp_app.h"
29 #include "nfp_net_ctrl.h"
30 #include "nfp_net_sriov.h"
31 #include "nfp_net.h"
32 #include "nfp_main.h"
33 #include "nfp_port.h"
34 
35 #define NFP_PF_CSR_SLICE_SIZE	(32 * 1024)
36 
37 /**
38  * nfp_net_get_mac_addr() - Get the MAC address.
39  * @pf:       NFP PF handle
40  * @netdev:   net_device to set MAC address on
41  * @port:     NFP port structure
42  *
43  * First try to get the MAC address from NSP ETH table. If that
44  * fails generate a random address.
45  */
46 void
nfp_net_get_mac_addr(struct nfp_pf * pf,struct net_device * netdev,struct nfp_port * port)47 nfp_net_get_mac_addr(struct nfp_pf *pf, struct net_device *netdev,
48 		     struct nfp_port *port)
49 {
50 	struct nfp_eth_table_port *eth_port;
51 
52 	eth_port = __nfp_port_get_eth_port(port);
53 	if (!eth_port) {
54 		eth_hw_addr_random(netdev);
55 		return;
56 	}
57 
58 	eth_hw_addr_set(netdev, eth_port->mac_addr);
59 	ether_addr_copy(netdev->perm_addr, eth_port->mac_addr);
60 }
61 
62 static struct nfp_eth_table_port *
nfp_net_find_port(struct nfp_eth_table * eth_tbl,unsigned int index)63 nfp_net_find_port(struct nfp_eth_table *eth_tbl, unsigned int index)
64 {
65 	int i;
66 
67 	for (i = 0; eth_tbl && i < eth_tbl->count; i++)
68 		if (eth_tbl->ports[i].index == index)
69 			return &eth_tbl->ports[i];
70 
71 	return NULL;
72 }
73 
nfp_net_pf_get_num_ports(struct nfp_pf * pf)74 static int nfp_net_pf_get_num_ports(struct nfp_pf *pf)
75 {
76 	return nfp_pf_rtsym_read_optional(pf, "nfd_cfg_pf%u_num_ports", 1);
77 }
78 
nfp_net_pf_free_vnic(struct nfp_pf * pf,struct nfp_net * nn)79 static void nfp_net_pf_free_vnic(struct nfp_pf *pf, struct nfp_net *nn)
80 {
81 	if (nfp_net_is_data_vnic(nn))
82 		nfp_app_vnic_free(pf->app, nn);
83 	nfp_port_free(nn->port);
84 	list_del(&nn->vnic_list);
85 	pf->num_vnics--;
86 	nfp_net_free(nn);
87 }
88 
nfp_net_pf_free_vnics(struct nfp_pf * pf)89 static void nfp_net_pf_free_vnics(struct nfp_pf *pf)
90 {
91 	struct nfp_net *nn, *next;
92 
93 	list_for_each_entry_safe(nn, next, &pf->vnics, vnic_list)
94 		if (nfp_net_is_data_vnic(nn))
95 			nfp_net_pf_free_vnic(pf, nn);
96 }
97 
98 static struct nfp_net *
nfp_net_pf_alloc_vnic(struct nfp_pf * pf,bool needs_netdev,void __iomem * ctrl_bar,void __iomem * qc_bar,int stride,unsigned int id)99 nfp_net_pf_alloc_vnic(struct nfp_pf *pf, bool needs_netdev,
100 		      void __iomem *ctrl_bar, void __iomem *qc_bar,
101 		      int stride, unsigned int id)
102 {
103 	u32 tx_base, rx_base, n_tx_rings, n_rx_rings;
104 	struct nfp_net *nn;
105 	int err;
106 
107 	tx_base = readl(ctrl_bar + NFP_NET_CFG_START_TXQ);
108 	rx_base = readl(ctrl_bar + NFP_NET_CFG_START_RXQ);
109 	n_tx_rings = readl(ctrl_bar + NFP_NET_CFG_MAX_TXRINGS);
110 	n_rx_rings = readl(ctrl_bar + NFP_NET_CFG_MAX_RXRINGS);
111 
112 	/* Allocate and initialise the vNIC */
113 	nn = nfp_net_alloc(pf->pdev, pf->dev_info, ctrl_bar, needs_netdev,
114 			   n_tx_rings, n_rx_rings);
115 	if (IS_ERR(nn))
116 		return nn;
117 
118 	nn->app = pf->app;
119 	nn->tx_bar = qc_bar + tx_base * NFP_QCP_QUEUE_ADDR_SZ;
120 	nn->rx_bar = qc_bar + rx_base * NFP_QCP_QUEUE_ADDR_SZ;
121 	nn->dp.is_vf = 0;
122 	nn->stride_rx = stride;
123 	nn->stride_tx = stride;
124 
125 	if (needs_netdev) {
126 		err = nfp_app_vnic_alloc(pf->app, nn, id);
127 		if (err) {
128 			nfp_net_free(nn);
129 			return ERR_PTR(err);
130 		}
131 	}
132 
133 	pf->num_vnics++;
134 	list_add_tail(&nn->vnic_list, &pf->vnics);
135 
136 	return nn;
137 }
138 
139 static int
nfp_net_pf_init_vnic(struct nfp_pf * pf,struct nfp_net * nn,unsigned int id)140 nfp_net_pf_init_vnic(struct nfp_pf *pf, struct nfp_net *nn, unsigned int id)
141 {
142 	int err;
143 
144 	nn->id = id;
145 
146 	if (nn->port) {
147 		err = nfp_devlink_port_register(pf->app, nn->port);
148 		if (err)
149 			return err;
150 	}
151 
152 	err = nfp_net_init(nn);
153 	if (err)
154 		goto err_devlink_port_clean;
155 
156 	nfp_net_debugfs_vnic_add(nn, pf->ddir);
157 
158 	nfp_net_info(nn);
159 
160 	if (nfp_net_is_data_vnic(nn)) {
161 		err = nfp_app_vnic_init(pf->app, nn);
162 		if (err)
163 			goto err_debugfs_vnic_clean;
164 	}
165 
166 	return 0;
167 
168 err_debugfs_vnic_clean:
169 	nfp_net_debugfs_dir_clean(&nn->debugfs_dir);
170 	nfp_net_clean(nn);
171 err_devlink_port_clean:
172 	if (nn->port)
173 		nfp_devlink_port_unregister(nn->port);
174 	return err;
175 }
176 
177 static int
nfp_net_pf_alloc_vnics(struct nfp_pf * pf,void __iomem * ctrl_bar,void __iomem * qc_bar,int stride)178 nfp_net_pf_alloc_vnics(struct nfp_pf *pf, void __iomem *ctrl_bar,
179 		       void __iomem *qc_bar, int stride)
180 {
181 	struct nfp_net *nn;
182 	unsigned int i;
183 	int err;
184 
185 	for (i = 0; i < pf->max_data_vnics; i++) {
186 		nn = nfp_net_pf_alloc_vnic(pf, true, ctrl_bar, qc_bar,
187 					   stride, i);
188 		if (IS_ERR(nn)) {
189 			err = PTR_ERR(nn);
190 			goto err_free_prev;
191 		}
192 
193 		if (nn->port)
194 			nn->port->link_cb = nfp_net_refresh_port_table;
195 
196 		ctrl_bar += NFP_PF_CSR_SLICE_SIZE;
197 
198 		/* Kill the vNIC if app init marked it as invalid */
199 		if (nn->port && nn->port->type == NFP_PORT_INVALID)
200 			nfp_net_pf_free_vnic(pf, nn);
201 	}
202 
203 	if (list_empty(&pf->vnics))
204 		return -ENODEV;
205 
206 	return 0;
207 
208 err_free_prev:
209 	nfp_net_pf_free_vnics(pf);
210 	return err;
211 }
212 
nfp_net_pf_clean_vnic(struct nfp_pf * pf,struct nfp_net * nn)213 static void nfp_net_pf_clean_vnic(struct nfp_pf *pf, struct nfp_net *nn)
214 {
215 	if (nfp_net_is_data_vnic(nn))
216 		nfp_app_vnic_clean(pf->app, nn);
217 	nfp_net_debugfs_dir_clean(&nn->debugfs_dir);
218 	nfp_net_clean(nn);
219 	if (nn->port)
220 		nfp_devlink_port_unregister(nn->port);
221 }
222 
nfp_net_pf_alloc_irqs(struct nfp_pf * pf)223 static int nfp_net_pf_alloc_irqs(struct nfp_pf *pf)
224 {
225 	unsigned int wanted_irqs, num_irqs, vnics_left, irqs_left;
226 	struct nfp_net *nn;
227 
228 	/* Get MSI-X vectors */
229 	wanted_irqs = 0;
230 	list_for_each_entry(nn, &pf->vnics, vnic_list)
231 		wanted_irqs += NFP_NET_NON_Q_VECTORS + nn->dp.num_r_vecs;
232 	pf->irq_entries = kcalloc(wanted_irqs, sizeof(*pf->irq_entries),
233 				  GFP_KERNEL);
234 	if (!pf->irq_entries)
235 		return -ENOMEM;
236 
237 	num_irqs = nfp_net_irqs_alloc(pf->pdev, pf->irq_entries,
238 				      NFP_NET_MIN_VNIC_IRQS * pf->num_vnics,
239 				      wanted_irqs);
240 	if (!num_irqs) {
241 		nfp_warn(pf->cpp, "Unable to allocate MSI-X vectors\n");
242 		kfree(pf->irq_entries);
243 		return -ENOMEM;
244 	}
245 
246 	/* Distribute IRQs to vNICs */
247 	irqs_left = num_irqs;
248 	vnics_left = pf->num_vnics;
249 	list_for_each_entry(nn, &pf->vnics, vnic_list) {
250 		unsigned int n;
251 
252 		n = min(NFP_NET_NON_Q_VECTORS + nn->dp.num_r_vecs,
253 			DIV_ROUND_UP(irqs_left, vnics_left));
254 		nfp_net_irqs_assign(nn, &pf->irq_entries[num_irqs - irqs_left],
255 				    n);
256 		irqs_left -= n;
257 		vnics_left--;
258 	}
259 
260 	return 0;
261 }
262 
nfp_net_pf_free_irqs(struct nfp_pf * pf)263 static void nfp_net_pf_free_irqs(struct nfp_pf *pf)
264 {
265 	nfp_net_irqs_disable(pf->pdev);
266 	kfree(pf->irq_entries);
267 }
268 
nfp_net_pf_init_vnics(struct nfp_pf * pf)269 static int nfp_net_pf_init_vnics(struct nfp_pf *pf)
270 {
271 	struct nfp_net *nn;
272 	unsigned int id;
273 	int err;
274 
275 	/* Finish vNIC init and register */
276 	id = 0;
277 	list_for_each_entry(nn, &pf->vnics, vnic_list) {
278 		if (!nfp_net_is_data_vnic(nn))
279 			continue;
280 		err = nfp_net_pf_init_vnic(pf, nn, id);
281 		if (err)
282 			goto err_prev_deinit;
283 
284 		id++;
285 	}
286 
287 	return 0;
288 
289 err_prev_deinit:
290 	list_for_each_entry_continue_reverse(nn, &pf->vnics, vnic_list)
291 		if (nfp_net_is_data_vnic(nn))
292 			nfp_net_pf_clean_vnic(pf, nn);
293 	return err;
294 }
295 
296 static int
nfp_net_pf_app_init(struct nfp_pf * pf,u8 __iomem * qc_bar,unsigned int stride)297 nfp_net_pf_app_init(struct nfp_pf *pf, u8 __iomem *qc_bar, unsigned int stride)
298 {
299 	struct devlink *devlink = priv_to_devlink(pf);
300 	u8 __iomem *ctrl_bar;
301 	int err;
302 
303 	pf->app = nfp_app_alloc(pf, nfp_net_pf_get_app_id(pf));
304 	if (IS_ERR(pf->app))
305 		return PTR_ERR(pf->app);
306 
307 	devl_lock(devlink);
308 	err = nfp_app_init(pf->app);
309 	devl_unlock(devlink);
310 	if (err)
311 		goto err_free;
312 
313 	if (!nfp_app_needs_ctrl_vnic(pf->app))
314 		return 0;
315 
316 	ctrl_bar = nfp_pf_map_rtsym(pf, "net.ctrl", "_pf%u_net_ctrl_bar",
317 				    NFP_PF_CSR_SLICE_SIZE, &pf->ctrl_vnic_bar);
318 	if (IS_ERR(ctrl_bar)) {
319 		nfp_err(pf->cpp, "Failed to find ctrl vNIC memory symbol\n");
320 		err = PTR_ERR(ctrl_bar);
321 		goto err_app_clean;
322 	}
323 
324 	pf->ctrl_vnic =	nfp_net_pf_alloc_vnic(pf, false, ctrl_bar, qc_bar,
325 					      stride, 0);
326 	if (IS_ERR(pf->ctrl_vnic)) {
327 		err = PTR_ERR(pf->ctrl_vnic);
328 		goto err_unmap;
329 	}
330 
331 	return 0;
332 
333 err_unmap:
334 	nfp_cpp_area_release_free(pf->ctrl_vnic_bar);
335 err_app_clean:
336 	devl_lock(devlink);
337 	nfp_app_clean(pf->app);
338 	devl_unlock(devlink);
339 err_free:
340 	nfp_app_free(pf->app);
341 	pf->app = NULL;
342 	return err;
343 }
344 
nfp_net_pf_app_clean(struct nfp_pf * pf)345 static void nfp_net_pf_app_clean(struct nfp_pf *pf)
346 {
347 	struct devlink *devlink = priv_to_devlink(pf);
348 
349 	if (pf->ctrl_vnic) {
350 		nfp_net_pf_free_vnic(pf, pf->ctrl_vnic);
351 		nfp_cpp_area_release_free(pf->ctrl_vnic_bar);
352 	}
353 
354 	devl_lock(devlink);
355 	nfp_app_clean(pf->app);
356 	devl_unlock(devlink);
357 
358 	nfp_app_free(pf->app);
359 	pf->app = NULL;
360 }
361 
nfp_net_pf_app_start_ctrl(struct nfp_pf * pf)362 static int nfp_net_pf_app_start_ctrl(struct nfp_pf *pf)
363 {
364 	int err;
365 
366 	if (!pf->ctrl_vnic)
367 		return 0;
368 	err = nfp_net_pf_init_vnic(pf, pf->ctrl_vnic, 0);
369 	if (err)
370 		return err;
371 
372 	err = nfp_ctrl_open(pf->ctrl_vnic);
373 	if (err)
374 		goto err_clean_ctrl;
375 
376 	return 0;
377 
378 err_clean_ctrl:
379 	nfp_net_pf_clean_vnic(pf, pf->ctrl_vnic);
380 	return err;
381 }
382 
nfp_net_pf_app_stop_ctrl(struct nfp_pf * pf)383 static void nfp_net_pf_app_stop_ctrl(struct nfp_pf *pf)
384 {
385 	if (!pf->ctrl_vnic)
386 		return;
387 	nfp_ctrl_close(pf->ctrl_vnic);
388 	nfp_net_pf_clean_vnic(pf, pf->ctrl_vnic);
389 }
390 
nfp_net_pf_app_start(struct nfp_pf * pf)391 static int nfp_net_pf_app_start(struct nfp_pf *pf)
392 {
393 	int err;
394 
395 	err = nfp_net_pf_app_start_ctrl(pf);
396 	if (err)
397 		return err;
398 
399 	err = nfp_app_start(pf->app, pf->ctrl_vnic);
400 	if (err)
401 		goto err_ctrl_stop;
402 
403 	if (pf->num_vfs) {
404 		err = nfp_app_sriov_enable(pf->app, pf->num_vfs);
405 		if (err)
406 			goto err_app_stop;
407 	}
408 
409 	return 0;
410 
411 err_app_stop:
412 	nfp_app_stop(pf->app);
413 err_ctrl_stop:
414 	nfp_net_pf_app_stop_ctrl(pf);
415 	return err;
416 }
417 
nfp_net_pf_app_stop(struct nfp_pf * pf)418 static void nfp_net_pf_app_stop(struct nfp_pf *pf)
419 {
420 	if (pf->num_vfs)
421 		nfp_app_sriov_disable(pf->app);
422 	nfp_app_stop(pf->app);
423 	nfp_net_pf_app_stop_ctrl(pf);
424 }
425 
nfp_net_pci_unmap_mem(struct nfp_pf * pf)426 static void nfp_net_pci_unmap_mem(struct nfp_pf *pf)
427 {
428 	if (pf->vfcfg_tbl2_area)
429 		nfp_cpp_area_release_free(pf->vfcfg_tbl2_area);
430 	if (pf->vf_cfg_bar)
431 		nfp_cpp_area_release_free(pf->vf_cfg_bar);
432 	if (pf->mac_stats_bar)
433 		nfp_cpp_area_release_free(pf->mac_stats_bar);
434 	nfp_cpp_area_release_free(pf->qc_area);
435 	nfp_cpp_area_release_free(pf->data_vnic_bar);
436 }
437 
nfp_net_pci_map_mem(struct nfp_pf * pf)438 static int nfp_net_pci_map_mem(struct nfp_pf *pf)
439 {
440 	u32 min_size, cpp_id;
441 	u8 __iomem *mem;
442 	int err;
443 
444 	min_size = pf->max_data_vnics * NFP_PF_CSR_SLICE_SIZE;
445 	mem = nfp_pf_map_rtsym(pf, "net.bar0", "_pf%d_net_bar0",
446 			       min_size, &pf->data_vnic_bar);
447 	if (IS_ERR(mem)) {
448 		nfp_err(pf->cpp, "Failed to find data vNIC memory symbol\n");
449 		return PTR_ERR(mem);
450 	}
451 
452 	if (pf->eth_tbl) {
453 		min_size =  NFP_MAC_STATS_SIZE * (pf->eth_tbl->max_index + 1);
454 		pf->mac_stats_mem = nfp_rtsym_map(pf->rtbl, "_mac_stats",
455 						  "net.macstats", min_size,
456 						  &pf->mac_stats_bar);
457 		if (IS_ERR(pf->mac_stats_mem)) {
458 			if (PTR_ERR(pf->mac_stats_mem) != -ENOENT) {
459 				err = PTR_ERR(pf->mac_stats_mem);
460 				goto err_unmap_ctrl;
461 			}
462 			pf->mac_stats_mem = NULL;
463 		}
464 	}
465 
466 	pf->vf_cfg_mem = nfp_pf_map_rtsym(pf, "net.vfcfg", "_pf%d_net_vf_bar",
467 					  NFP_NET_CFG_BAR_SZ * pf->limit_vfs,
468 					  &pf->vf_cfg_bar);
469 	if (IS_ERR(pf->vf_cfg_mem)) {
470 		if (PTR_ERR(pf->vf_cfg_mem) != -ENOENT) {
471 			err = PTR_ERR(pf->vf_cfg_mem);
472 			goto err_unmap_mac_stats;
473 		}
474 		pf->vf_cfg_mem = NULL;
475 	}
476 
477 	min_size = NFP_NET_VF_CFG_SZ * pf->limit_vfs + NFP_NET_VF_CFG_MB_SZ;
478 	pf->vfcfg_tbl2 = nfp_pf_map_rtsym(pf, "net.vfcfg_tbl2",
479 					  "_pf%d_net_vf_cfg2",
480 					  min_size, &pf->vfcfg_tbl2_area);
481 	if (IS_ERR(pf->vfcfg_tbl2)) {
482 		if (PTR_ERR(pf->vfcfg_tbl2) != -ENOENT) {
483 			err = PTR_ERR(pf->vfcfg_tbl2);
484 			goto err_unmap_vf_cfg;
485 		}
486 		pf->vfcfg_tbl2 = NULL;
487 	}
488 
489 	cpp_id = NFP_CPP_ISLAND_ID(0, NFP_CPP_ACTION_RW, 0, 0);
490 	mem = nfp_cpp_map_area(pf->cpp, "net.qc", cpp_id,
491 			       nfp_qcp_queue_offset(pf->dev_info, 0),
492 			       pf->dev_info->qc_area_sz, &pf->qc_area);
493 	if (IS_ERR(mem)) {
494 		nfp_err(pf->cpp, "Failed to map Queue Controller area.\n");
495 		err = PTR_ERR(mem);
496 		goto err_unmap_vfcfg_tbl2;
497 	}
498 
499 	return 0;
500 
501 err_unmap_vfcfg_tbl2:
502 	if (pf->vfcfg_tbl2_area)
503 		nfp_cpp_area_release_free(pf->vfcfg_tbl2_area);
504 err_unmap_vf_cfg:
505 	if (pf->vf_cfg_bar)
506 		nfp_cpp_area_release_free(pf->vf_cfg_bar);
507 err_unmap_mac_stats:
508 	if (pf->mac_stats_bar)
509 		nfp_cpp_area_release_free(pf->mac_stats_bar);
510 err_unmap_ctrl:
511 	nfp_cpp_area_release_free(pf->data_vnic_bar);
512 	return err;
513 }
514 
515 static const unsigned int lr_to_speed[] = {
516 	[NFP_NET_CFG_STS_LINK_RATE_UNSUPPORTED]	= 0,
517 	[NFP_NET_CFG_STS_LINK_RATE_UNKNOWN]	= SPEED_UNKNOWN,
518 	[NFP_NET_CFG_STS_LINK_RATE_1G]		= SPEED_1000,
519 	[NFP_NET_CFG_STS_LINK_RATE_10G]		= SPEED_10000,
520 	[NFP_NET_CFG_STS_LINK_RATE_25G]		= SPEED_25000,
521 	[NFP_NET_CFG_STS_LINK_RATE_40G]		= SPEED_40000,
522 	[NFP_NET_CFG_STS_LINK_RATE_50G]		= SPEED_50000,
523 	[NFP_NET_CFG_STS_LINK_RATE_100G]	= SPEED_100000,
524 };
525 
nfp_net_lr2speed(unsigned int linkrate)526 unsigned int nfp_net_lr2speed(unsigned int linkrate)
527 {
528 	if (linkrate < ARRAY_SIZE(lr_to_speed))
529 		return lr_to_speed[linkrate];
530 
531 	return SPEED_UNKNOWN;
532 }
533 
nfp_net_speed2lr(unsigned int speed)534 unsigned int nfp_net_speed2lr(unsigned int speed)
535 {
536 	int i;
537 
538 	for (i = 0; i < ARRAY_SIZE(lr_to_speed); i++) {
539 		if (speed == lr_to_speed[i])
540 			return i;
541 	}
542 
543 	return NFP_NET_CFG_STS_LINK_RATE_UNKNOWN;
544 }
545 
nfp_net_notify_port_speed(struct nfp_port * port)546 static void nfp_net_notify_port_speed(struct nfp_port *port)
547 {
548 	struct net_device *netdev = port->netdev;
549 	struct nfp_net *nn;
550 	u16 sts;
551 
552 	if (!nfp_netdev_is_nfp_net(netdev))
553 		return;
554 
555 	nn = netdev_priv(netdev);
556 	sts = nn_readw(nn, NFP_NET_CFG_STS);
557 
558 	if (!(sts & NFP_NET_CFG_STS_LINK)) {
559 		nn_writew(nn, NFP_NET_CFG_STS_NSP_LINK_RATE, NFP_NET_CFG_STS_LINK_RATE_UNKNOWN);
560 		return;
561 	}
562 
563 	nn_writew(nn, NFP_NET_CFG_STS_NSP_LINK_RATE, nfp_net_speed2lr(port->eth_port->speed));
564 }
565 
566 static int
nfp_net_eth_port_update(struct nfp_cpp * cpp,struct nfp_port * port,struct nfp_eth_table * eth_table)567 nfp_net_eth_port_update(struct nfp_cpp *cpp, struct nfp_port *port,
568 			struct nfp_eth_table *eth_table)
569 {
570 	struct nfp_eth_table_port *eth_port;
571 
572 	ASSERT_RTNL();
573 
574 	eth_port = nfp_net_find_port(eth_table, port->eth_id);
575 	if (!eth_port) {
576 		set_bit(NFP_PORT_CHANGED, &port->flags);
577 		nfp_warn(cpp, "Warning: port #%d not present after reconfig\n",
578 			 port->eth_id);
579 		return -EIO;
580 	}
581 	if (eth_port->override_changed) {
582 		nfp_warn(cpp, "Port #%d config changed, unregistering. Driver reload required before port will be operational again.\n", port->eth_id);
583 		port->type = NFP_PORT_INVALID;
584 	}
585 
586 	memcpy(port->eth_port, eth_port, sizeof(*eth_port));
587 	nfp_net_notify_port_speed(port);
588 
589 	return 0;
590 }
591 
nfp_net_refresh_port_table_sync(struct nfp_pf * pf)592 int nfp_net_refresh_port_table_sync(struct nfp_pf *pf)
593 {
594 	struct devlink *devlink = priv_to_devlink(pf);
595 	struct nfp_eth_table *eth_table;
596 	struct nfp_net *nn, *next;
597 	struct nfp_port *port;
598 	int err;
599 
600 	devl_assert_locked(devlink);
601 
602 	/* Check for nfp_net_pci_remove() racing against us */
603 	if (list_empty(&pf->vnics))
604 		return 0;
605 
606 	/* Update state of all ports */
607 	rtnl_lock();
608 	list_for_each_entry(port, &pf->ports, port_list)
609 		clear_bit(NFP_PORT_CHANGED, &port->flags);
610 
611 	eth_table = nfp_eth_read_ports(pf->cpp);
612 	if (!eth_table) {
613 		list_for_each_entry(port, &pf->ports, port_list)
614 			if (__nfp_port_get_eth_port(port))
615 				set_bit(NFP_PORT_CHANGED, &port->flags);
616 		rtnl_unlock();
617 		nfp_err(pf->cpp, "Error refreshing port config!\n");
618 		return -EIO;
619 	}
620 
621 	list_for_each_entry(port, &pf->ports, port_list)
622 		if (__nfp_port_get_eth_port(port))
623 			nfp_net_eth_port_update(pf->cpp, port, eth_table);
624 	rtnl_unlock();
625 
626 	kfree(eth_table);
627 
628 	/* Resync repr state. This may cause reprs to be removed. */
629 	err = nfp_reprs_resync_phys_ports(pf->app);
630 	if (err)
631 		return err;
632 
633 	/* Shoot off the ports which became invalid */
634 	list_for_each_entry_safe(nn, next, &pf->vnics, vnic_list) {
635 		if (!nn->port || nn->port->type != NFP_PORT_INVALID)
636 			continue;
637 
638 		nfp_net_pf_clean_vnic(pf, nn);
639 		nfp_net_pf_free_vnic(pf, nn);
640 	}
641 
642 	return 0;
643 }
644 
nfp_net_refresh_vnics(struct work_struct * work)645 static void nfp_net_refresh_vnics(struct work_struct *work)
646 {
647 	struct nfp_pf *pf = container_of(work, struct nfp_pf,
648 					 port_refresh_work);
649 	struct devlink *devlink = priv_to_devlink(pf);
650 
651 	devl_lock(devlink);
652 	nfp_net_refresh_port_table_sync(pf);
653 	devl_unlock(devlink);
654 }
655 
nfp_net_refresh_port_table(struct nfp_port * port)656 void nfp_net_refresh_port_table(struct nfp_port *port)
657 {
658 	struct nfp_pf *pf = port->app->pf;
659 
660 	set_bit(NFP_PORT_CHANGED, &port->flags);
661 
662 	queue_work(pf->wq, &pf->port_refresh_work);
663 }
664 
nfp_net_refresh_eth_port(struct nfp_port * port)665 int nfp_net_refresh_eth_port(struct nfp_port *port)
666 {
667 	struct nfp_cpp *cpp = port->app->cpp;
668 	struct nfp_eth_table *eth_table;
669 	int ret;
670 
671 	clear_bit(NFP_PORT_CHANGED, &port->flags);
672 
673 	eth_table = nfp_eth_read_ports(cpp);
674 	if (!eth_table) {
675 		set_bit(NFP_PORT_CHANGED, &port->flags);
676 		nfp_err(cpp, "Error refreshing port state table!\n");
677 		return -EIO;
678 	}
679 
680 	ret = nfp_net_eth_port_update(cpp, port, eth_table);
681 
682 	kfree(eth_table);
683 
684 	return ret;
685 }
686 
687 /*
688  * PCI device functions
689  */
nfp_net_pci_probe(struct nfp_pf * pf)690 int nfp_net_pci_probe(struct nfp_pf *pf)
691 {
692 	struct devlink *devlink = priv_to_devlink(pf);
693 	struct nfp_net_fw_version fw_ver;
694 	u8 __iomem *ctrl_bar, *qc_bar;
695 	int stride;
696 	int err;
697 
698 	INIT_WORK(&pf->port_refresh_work, nfp_net_refresh_vnics);
699 
700 	if (!pf->rtbl) {
701 		nfp_err(pf->cpp, "No %s, giving up.\n",
702 			pf->fw_loaded ? "symbol table" : "firmware found");
703 		return -EINVAL;
704 	}
705 
706 	pf->max_data_vnics = nfp_net_pf_get_num_ports(pf);
707 	if ((int)pf->max_data_vnics < 0)
708 		return pf->max_data_vnics;
709 
710 	err = nfp_net_pci_map_mem(pf);
711 	if (err)
712 		return err;
713 
714 	ctrl_bar = nfp_cpp_area_iomem(pf->data_vnic_bar);
715 	qc_bar = nfp_cpp_area_iomem(pf->qc_area);
716 	if (!ctrl_bar || !qc_bar) {
717 		err = -EIO;
718 		goto err_unmap;
719 	}
720 
721 	nfp_net_get_fw_version(&fw_ver, ctrl_bar);
722 	if (fw_ver.extend & NFP_NET_CFG_VERSION_RESERVED_MASK ||
723 	    fw_ver.class != NFP_NET_CFG_VERSION_CLASS_GENERIC) {
724 		nfp_err(pf->cpp, "Unknown Firmware ABI %d.%d.%d.%d\n",
725 			fw_ver.extend, fw_ver.class,
726 			fw_ver.major, fw_ver.minor);
727 		err = -EINVAL;
728 		goto err_unmap;
729 	}
730 
731 	/* Determine stride */
732 	if (nfp_net_fw_ver_eq(&fw_ver, 0, 0, 0, 1)) {
733 		stride = 2;
734 		nfp_warn(pf->cpp, "OBSOLETE Firmware detected - VF isolation not available\n");
735 	} else {
736 		switch (fw_ver.major) {
737 		case 1 ... 5:
738 			stride = 4;
739 			break;
740 		default:
741 			nfp_err(pf->cpp, "Unsupported Firmware ABI %d.%d.%d.%d\n",
742 				fw_ver.extend, fw_ver.class,
743 				fw_ver.major, fw_ver.minor);
744 			err = -EINVAL;
745 			goto err_unmap;
746 		}
747 	}
748 
749 	err = nfp_net_pf_app_init(pf, qc_bar, stride);
750 	if (err)
751 		goto err_unmap;
752 
753 	err = nfp_shared_buf_register(pf);
754 	if (err)
755 		goto err_devlink_unreg;
756 
757 	devl_lock(devlink);
758 	err = nfp_devlink_params_register(pf);
759 	if (err)
760 		goto err_shared_buf_unreg;
761 
762 	pf->ddir = nfp_net_debugfs_device_add(pf->pdev);
763 
764 	/* Allocate the vnics and do basic init */
765 	err = nfp_net_pf_alloc_vnics(pf, ctrl_bar, qc_bar, stride);
766 	if (err)
767 		goto err_clean_ddir;
768 
769 	err = nfp_net_pf_alloc_irqs(pf);
770 	if (err)
771 		goto err_free_vnics;
772 
773 	err = nfp_net_pf_app_start(pf);
774 	if (err)
775 		goto err_free_irqs;
776 
777 	err = nfp_net_pf_init_vnics(pf);
778 	if (err)
779 		goto err_stop_app;
780 
781 	devl_unlock(devlink);
782 	devlink_register(devlink);
783 
784 	return 0;
785 
786 err_stop_app:
787 	nfp_net_pf_app_stop(pf);
788 err_free_irqs:
789 	nfp_net_pf_free_irqs(pf);
790 err_free_vnics:
791 	nfp_net_pf_free_vnics(pf);
792 err_clean_ddir:
793 	nfp_net_debugfs_dir_clean(&pf->ddir);
794 	nfp_devlink_params_unregister(pf);
795 err_shared_buf_unreg:
796 	devl_unlock(devlink);
797 	nfp_shared_buf_unregister(pf);
798 err_devlink_unreg:
799 	cancel_work_sync(&pf->port_refresh_work);
800 	nfp_net_pf_app_clean(pf);
801 err_unmap:
802 	nfp_net_pci_unmap_mem(pf);
803 	return err;
804 }
805 
nfp_net_pci_remove(struct nfp_pf * pf)806 void nfp_net_pci_remove(struct nfp_pf *pf)
807 {
808 	struct devlink *devlink = priv_to_devlink(pf);
809 	struct nfp_net *nn, *next;
810 
811 	devlink_unregister(priv_to_devlink(pf));
812 	devl_lock(devlink);
813 	list_for_each_entry_safe(nn, next, &pf->vnics, vnic_list) {
814 		if (!nfp_net_is_data_vnic(nn))
815 			continue;
816 		nfp_net_pf_clean_vnic(pf, nn);
817 		nfp_net_pf_free_vnic(pf, nn);
818 	}
819 
820 	nfp_net_pf_app_stop(pf);
821 	/* stop app first, to avoid double free of ctrl vNIC's ddir */
822 	nfp_net_debugfs_dir_clean(&pf->ddir);
823 
824 	nfp_devlink_params_unregister(pf);
825 
826 	devl_unlock(devlink);
827 
828 	nfp_shared_buf_unregister(pf);
829 
830 	nfp_net_pf_free_irqs(pf);
831 	nfp_net_pf_app_clean(pf);
832 	nfp_net_pci_unmap_mem(pf);
833 
834 	cancel_work_sync(&pf->port_refresh_work);
835 }
836