1
2
3
4#include <linux/bitfield.h>
5#include <linux/bitmap.h>
6#include <linux/etherdevice.h>
7#include <linux/lockdep.h>
8#include <linux/netdevice.h>
9#include <linux/rcupdate.h>
10#include <linux/rtnetlink.h>
11#include <linux/slab.h>
12
13#include "../nfpcore/nfp.h"
14#include "../nfpcore/nfp_cpp.h"
15#include "../nfpcore/nfp_nsp.h"
16#include "../nfp_app.h"
17#include "../nfp_main.h"
18#include "../nfp_net.h"
19#include "../nfp_net_repr.h"
20#include "../nfp_port.h"
21#include "main.h"
22
23static u32 nfp_abm_portid(enum nfp_repr_type rtype, unsigned int id)
24{
25 return FIELD_PREP(NFP_ABM_PORTID_TYPE, rtype) |
26 FIELD_PREP(NFP_ABM_PORTID_ID, id);
27}
28
29static int
30nfp_abm_setup_tc(struct nfp_app *app, struct net_device *netdev,
31 enum tc_setup_type type, void *type_data)
32{
33 struct nfp_repr *repr = netdev_priv(netdev);
34 struct nfp_port *port;
35
36 port = nfp_port_from_netdev(netdev);
37 if (!port || port->type != NFP_PORT_PF_PORT)
38 return -EOPNOTSUPP;
39
40 switch (type) {
41 case TC_SETUP_ROOT_QDISC:
42 return nfp_abm_setup_root(netdev, repr->app_priv, type_data);
43 case TC_SETUP_QDISC_MQ:
44 return nfp_abm_setup_tc_mq(netdev, repr->app_priv, type_data);
45 case TC_SETUP_QDISC_RED:
46 return nfp_abm_setup_tc_red(netdev, repr->app_priv, type_data);
47 case TC_SETUP_QDISC_GRED:
48 return nfp_abm_setup_tc_gred(netdev, repr->app_priv, type_data);
49 case TC_SETUP_BLOCK:
50 return nfp_abm_setup_cls_block(netdev, repr, type_data);
51 default:
52 return -EOPNOTSUPP;
53 }
54}
55
56static struct net_device *
57nfp_abm_repr_get(struct nfp_app *app, u32 port_id, bool *redir_egress)
58{
59 enum nfp_repr_type rtype;
60 struct nfp_reprs *reprs;
61 u8 port;
62
63 rtype = FIELD_GET(NFP_ABM_PORTID_TYPE, port_id);
64 port = FIELD_GET(NFP_ABM_PORTID_ID, port_id);
65
66 reprs = rcu_dereference(app->reprs[rtype]);
67 if (!reprs)
68 return NULL;
69
70 if (port >= reprs->num_reprs)
71 return NULL;
72
73 return rcu_dereference(reprs->reprs[port]);
74}
75
76static int
77nfp_abm_spawn_repr(struct nfp_app *app, struct nfp_abm_link *alink,
78 enum nfp_port_type ptype)
79{
80 struct net_device *netdev;
81 enum nfp_repr_type rtype;
82 struct nfp_reprs *reprs;
83 struct nfp_repr *repr;
84 struct nfp_port *port;
85 unsigned int txqs;
86 int err;
87
88 if (ptype == NFP_PORT_PHYS_PORT) {
89 rtype = NFP_REPR_TYPE_PHYS_PORT;
90 txqs = 1;
91 } else {
92 rtype = NFP_REPR_TYPE_PF;
93 txqs = alink->vnic->max_rx_rings;
94 }
95
96 netdev = nfp_repr_alloc_mqs(app, txqs, 1);
97 if (!netdev)
98 return -ENOMEM;
99 repr = netdev_priv(netdev);
100 repr->app_priv = alink;
101
102 port = nfp_port_alloc(app, ptype, netdev);
103 if (IS_ERR(port)) {
104 err = PTR_ERR(port);
105 goto err_free_repr;
106 }
107
108 if (ptype == NFP_PORT_PHYS_PORT) {
109 port->eth_forced = true;
110 err = nfp_port_init_phy_port(app->pf, app, port, alink->id);
111 if (err)
112 goto err_free_port;
113 } else {
114 port->pf_id = alink->abm->pf_id;
115 port->pf_split = app->pf->max_data_vnics > 1;
116 port->pf_split_id = alink->id;
117 port->vnic = alink->vnic->dp.ctrl_bar;
118 }
119
120 SET_NETDEV_DEV(netdev, &alink->vnic->pdev->dev);
121 eth_hw_addr_random(netdev);
122
123 err = nfp_repr_init(app, netdev, nfp_abm_portid(rtype, alink->id),
124 port, alink->vnic->dp.netdev);
125 if (err)
126 goto err_free_port;
127
128 reprs = nfp_reprs_get_locked(app, rtype);
129 WARN(nfp_repr_get_locked(app, reprs, alink->id), "duplicate repr");
130 rtnl_lock();
131 rcu_assign_pointer(reprs->reprs[alink->id], netdev);
132 rtnl_unlock();
133
134 nfp_info(app->cpp, "%s Port %d Representor(%s) created\n",
135 ptype == NFP_PORT_PF_PORT ? "PCIe" : "Phys",
136 alink->id, netdev->name);
137
138 return 0;
139
140err_free_port:
141 nfp_port_free(port);
142err_free_repr:
143 nfp_repr_free(netdev);
144 return err;
145}
146
147static void
148nfp_abm_kill_repr(struct nfp_app *app, struct nfp_abm_link *alink,
149 enum nfp_repr_type rtype)
150{
151 struct net_device *netdev;
152 struct nfp_reprs *reprs;
153
154 reprs = nfp_reprs_get_locked(app, rtype);
155 netdev = nfp_repr_get_locked(app, reprs, alink->id);
156 if (!netdev)
157 return;
158 rtnl_lock();
159 rcu_assign_pointer(reprs->reprs[alink->id], NULL);
160 rtnl_unlock();
161 synchronize_rcu();
162
163 nfp_repr_clean_and_free((struct nfp_repr *)netdev_priv(netdev));
164}
165
166static void
167nfp_abm_kill_reprs(struct nfp_abm *abm, struct nfp_abm_link *alink)
168{
169 nfp_abm_kill_repr(abm->app, alink, NFP_REPR_TYPE_PF);
170 nfp_abm_kill_repr(abm->app, alink, NFP_REPR_TYPE_PHYS_PORT);
171}
172
173static void nfp_abm_kill_reprs_all(struct nfp_abm *abm)
174{
175 struct nfp_pf *pf = abm->app->pf;
176 struct nfp_net *nn;
177
178 list_for_each_entry(nn, &pf->vnics, vnic_list)
179 nfp_abm_kill_reprs(abm, (struct nfp_abm_link *)nn->app_priv);
180}
181
182static enum devlink_eswitch_mode nfp_abm_eswitch_mode_get(struct nfp_app *app)
183{
184 struct nfp_abm *abm = app->priv;
185
186 return abm->eswitch_mode;
187}
188
189static int nfp_abm_eswitch_set_legacy(struct nfp_abm *abm)
190{
191 nfp_abm_kill_reprs_all(abm);
192 nfp_abm_ctrl_qm_disable(abm);
193
194 abm->eswitch_mode = DEVLINK_ESWITCH_MODE_LEGACY;
195 return 0;
196}
197
198static void nfp_abm_eswitch_clean_up(struct nfp_abm *abm)
199{
200 if (abm->eswitch_mode != DEVLINK_ESWITCH_MODE_LEGACY)
201 WARN_ON(nfp_abm_eswitch_set_legacy(abm));
202}
203
204static int nfp_abm_eswitch_set_switchdev(struct nfp_abm *abm)
205{
206 struct nfp_app *app = abm->app;
207 struct nfp_pf *pf = app->pf;
208 struct nfp_net *nn;
209 int err;
210
211 if (!abm->red_support)
212 return -EOPNOTSUPP;
213
214 err = nfp_abm_ctrl_qm_enable(abm);
215 if (err)
216 return err;
217
218 list_for_each_entry(nn, &pf->vnics, vnic_list) {
219 struct nfp_abm_link *alink = nn->app_priv;
220
221 err = nfp_abm_spawn_repr(app, alink, NFP_PORT_PHYS_PORT);
222 if (err)
223 goto err_kill_all_reprs;
224
225 err = nfp_abm_spawn_repr(app, alink, NFP_PORT_PF_PORT);
226 if (err)
227 goto err_kill_all_reprs;
228 }
229
230 abm->eswitch_mode = DEVLINK_ESWITCH_MODE_SWITCHDEV;
231 return 0;
232
233err_kill_all_reprs:
234 nfp_abm_kill_reprs_all(abm);
235 nfp_abm_ctrl_qm_disable(abm);
236 return err;
237}
238
239static int nfp_abm_eswitch_mode_set(struct nfp_app *app, u16 mode)
240{
241 struct nfp_abm *abm = app->priv;
242
243 if (abm->eswitch_mode == mode)
244 return 0;
245
246 switch (mode) {
247 case DEVLINK_ESWITCH_MODE_LEGACY:
248 return nfp_abm_eswitch_set_legacy(abm);
249 case DEVLINK_ESWITCH_MODE_SWITCHDEV:
250 return nfp_abm_eswitch_set_switchdev(abm);
251 default:
252 return -EINVAL;
253 }
254}
255
256static void
257nfp_abm_vnic_set_mac(struct nfp_pf *pf, struct nfp_abm *abm, struct nfp_net *nn,
258 unsigned int id)
259{
260 struct nfp_eth_table_port *eth_port = &pf->eth_tbl->ports[id];
261 u8 mac_addr[ETH_ALEN];
262 struct nfp_nsp *nsp;
263 char hwinfo[32];
264 int err;
265
266 if (id > pf->eth_tbl->count) {
267 nfp_warn(pf->cpp, "No entry for persistent MAC address\n");
268 eth_hw_addr_random(nn->dp.netdev);
269 return;
270 }
271
272 snprintf(hwinfo, sizeof(hwinfo), "eth%u.mac.pf%u",
273 eth_port->eth_index, abm->pf_id);
274
275 nsp = nfp_nsp_open(pf->cpp);
276 if (IS_ERR(nsp)) {
277 nfp_warn(pf->cpp, "Failed to access the NSP for persistent MAC address: %ld\n",
278 PTR_ERR(nsp));
279 eth_hw_addr_random(nn->dp.netdev);
280 return;
281 }
282
283 if (!nfp_nsp_has_hwinfo_lookup(nsp)) {
284 nfp_warn(pf->cpp, "NSP doesn't support PF MAC generation\n");
285 eth_hw_addr_random(nn->dp.netdev);
286 nfp_nsp_close(nsp);
287 return;
288 }
289
290 err = nfp_nsp_hwinfo_lookup(nsp, hwinfo, sizeof(hwinfo));
291 nfp_nsp_close(nsp);
292 if (err) {
293 nfp_warn(pf->cpp, "Reading persistent MAC address failed: %d\n",
294 err);
295 eth_hw_addr_random(nn->dp.netdev);
296 return;
297 }
298
299 if (sscanf(hwinfo, "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx",
300 &mac_addr[0], &mac_addr[1], &mac_addr[2],
301 &mac_addr[3], &mac_addr[4], &mac_addr[5]) != 6) {
302 nfp_warn(pf->cpp, "Can't parse persistent MAC address (%s)\n",
303 hwinfo);
304 eth_hw_addr_random(nn->dp.netdev);
305 return;
306 }
307
308 ether_addr_copy(nn->dp.netdev->dev_addr, mac_addr);
309 ether_addr_copy(nn->dp.netdev->perm_addr, mac_addr);
310}
311
312static int
313nfp_abm_vnic_alloc(struct nfp_app *app, struct nfp_net *nn, unsigned int id)
314{
315 struct nfp_eth_table_port *eth_port = &app->pf->eth_tbl->ports[id];
316 struct nfp_abm *abm = app->priv;
317 struct nfp_abm_link *alink;
318 int err;
319
320 alink = kzalloc(sizeof(*alink), GFP_KERNEL);
321 if (!alink)
322 return -ENOMEM;
323 nn->app_priv = alink;
324 alink->abm = abm;
325 alink->vnic = nn;
326 alink->id = id;
327 alink->total_queues = alink->vnic->max_rx_rings;
328
329 INIT_LIST_HEAD(&alink->dscp_map);
330
331 err = nfp_abm_ctrl_read_params(alink);
332 if (err)
333 goto err_free_alink;
334
335 alink->prio_map = kzalloc(abm->prio_map_len, GFP_KERNEL);
336 if (!alink->prio_map) {
337 err = -ENOMEM;
338 goto err_free_alink;
339 }
340
341
342
343
344 err = nfp_eth_set_configured(app->cpp, eth_port->index, true);
345 if (err < 0)
346 goto err_free_priomap;
347
348 netif_keep_dst(nn->dp.netdev);
349
350 nfp_abm_vnic_set_mac(app->pf, abm, nn, id);
351 INIT_RADIX_TREE(&alink->qdiscs, GFP_KERNEL);
352
353 return 0;
354
355err_free_priomap:
356 kfree(alink->prio_map);
357err_free_alink:
358 kfree(alink);
359 return err;
360}
361
362static void nfp_abm_vnic_free(struct nfp_app *app, struct nfp_net *nn)
363{
364 struct nfp_abm_link *alink = nn->app_priv;
365
366 nfp_abm_kill_reprs(alink->abm, alink);
367 WARN(!radix_tree_empty(&alink->qdiscs), "left over qdiscs\n");
368 kfree(alink->prio_map);
369 kfree(alink);
370}
371
372static int nfp_abm_vnic_init(struct nfp_app *app, struct nfp_net *nn)
373{
374 struct nfp_abm_link *alink = nn->app_priv;
375
376 if (nfp_abm_has_prio(alink->abm))
377 return nfp_abm_ctrl_prio_map_update(alink, alink->prio_map);
378 return 0;
379}
380
381static u64 *
382nfp_abm_port_get_stats(struct nfp_app *app, struct nfp_port *port, u64 *data)
383{
384 struct nfp_repr *repr = netdev_priv(port->netdev);
385 struct nfp_abm_link *alink;
386 unsigned int i;
387
388 if (port->type != NFP_PORT_PF_PORT)
389 return data;
390 alink = repr->app_priv;
391 for (i = 0; i < alink->vnic->dp.num_r_vecs; i++) {
392 *data++ = nfp_abm_ctrl_stat_non_sto(alink, i);
393 *data++ = nfp_abm_ctrl_stat_sto(alink, i);
394 }
395 return data;
396}
397
398static int
399nfp_abm_port_get_stats_count(struct nfp_app *app, struct nfp_port *port)
400{
401 struct nfp_repr *repr = netdev_priv(port->netdev);
402 struct nfp_abm_link *alink;
403
404 if (port->type != NFP_PORT_PF_PORT)
405 return 0;
406 alink = repr->app_priv;
407 return alink->vnic->dp.num_r_vecs * 2;
408}
409
410static u8 *
411nfp_abm_port_get_stats_strings(struct nfp_app *app, struct nfp_port *port,
412 u8 *data)
413{
414 struct nfp_repr *repr = netdev_priv(port->netdev);
415 struct nfp_abm_link *alink;
416 unsigned int i;
417
418 if (port->type != NFP_PORT_PF_PORT)
419 return data;
420 alink = repr->app_priv;
421 for (i = 0; i < alink->vnic->dp.num_r_vecs; i++) {
422 ethtool_sprintf(&data, "q%u_no_wait", i);
423 ethtool_sprintf(&data, "q%u_delayed", i);
424 }
425 return data;
426}
427
428static int nfp_abm_fw_init_reset(struct nfp_abm *abm)
429{
430 unsigned int i;
431
432 if (!abm->red_support)
433 return 0;
434
435 for (i = 0; i < abm->num_bands * NFP_NET_MAX_RX_RINGS; i++) {
436 __nfp_abm_ctrl_set_q_lvl(abm, i, NFP_ABM_LVL_INFINITY);
437 __nfp_abm_ctrl_set_q_act(abm, i, NFP_ABM_ACT_DROP);
438 }
439
440 return nfp_abm_ctrl_qm_disable(abm);
441}
442
443static int nfp_abm_init(struct nfp_app *app)
444{
445 struct nfp_pf *pf = app->pf;
446 struct nfp_reprs *reprs;
447 struct nfp_abm *abm;
448 int err;
449
450 if (!pf->eth_tbl) {
451 nfp_err(pf->cpp, "ABM NIC requires ETH table\n");
452 return -EINVAL;
453 }
454 if (pf->max_data_vnics != pf->eth_tbl->count) {
455 nfp_err(pf->cpp, "ETH entries don't match vNICs (%d vs %d)\n",
456 pf->max_data_vnics, pf->eth_tbl->count);
457 return -EINVAL;
458 }
459 if (!pf->mac_stats_bar) {
460 nfp_warn(app->cpp, "ABM NIC requires mac_stats symbol\n");
461 return -EINVAL;
462 }
463
464 abm = kzalloc(sizeof(*abm), GFP_KERNEL);
465 if (!abm)
466 return -ENOMEM;
467 app->priv = abm;
468 abm->app = app;
469
470 err = nfp_abm_ctrl_find_addrs(abm);
471 if (err)
472 goto err_free_abm;
473
474 err = -ENOMEM;
475 abm->num_thresholds = array_size(abm->num_bands, NFP_NET_MAX_RX_RINGS);
476 abm->threshold_undef = bitmap_zalloc(abm->num_thresholds, GFP_KERNEL);
477 if (!abm->threshold_undef)
478 goto err_free_abm;
479
480 abm->thresholds = kvcalloc(abm->num_thresholds,
481 sizeof(*abm->thresholds), GFP_KERNEL);
482 if (!abm->thresholds)
483 goto err_free_thresh_umap;
484
485 abm->actions = kvcalloc(abm->num_thresholds, sizeof(*abm->actions),
486 GFP_KERNEL);
487 if (!abm->actions)
488 goto err_free_thresh;
489
490
491 err = nfp_abm_fw_init_reset(abm);
492 if (err)
493 goto err_free_act;
494
495 err = -ENOMEM;
496 reprs = nfp_reprs_alloc(pf->max_data_vnics);
497 if (!reprs)
498 goto err_free_act;
499 RCU_INIT_POINTER(app->reprs[NFP_REPR_TYPE_PHYS_PORT], reprs);
500
501 reprs = nfp_reprs_alloc(pf->max_data_vnics);
502 if (!reprs)
503 goto err_free_phys;
504 RCU_INIT_POINTER(app->reprs[NFP_REPR_TYPE_PF], reprs);
505
506 return 0;
507
508err_free_phys:
509 nfp_reprs_clean_and_free_by_type(app, NFP_REPR_TYPE_PHYS_PORT);
510err_free_act:
511 kvfree(abm->actions);
512err_free_thresh:
513 kvfree(abm->thresholds);
514err_free_thresh_umap:
515 bitmap_free(abm->threshold_undef);
516err_free_abm:
517 kfree(abm);
518 app->priv = NULL;
519 return err;
520}
521
522static void nfp_abm_clean(struct nfp_app *app)
523{
524 struct nfp_abm *abm = app->priv;
525
526 nfp_abm_eswitch_clean_up(abm);
527 nfp_reprs_clean_and_free_by_type(app, NFP_REPR_TYPE_PF);
528 nfp_reprs_clean_and_free_by_type(app, NFP_REPR_TYPE_PHYS_PORT);
529 bitmap_free(abm->threshold_undef);
530 kvfree(abm->actions);
531 kvfree(abm->thresholds);
532 kfree(abm);
533 app->priv = NULL;
534}
535
536const struct nfp_app_type app_abm = {
537 .id = NFP_APP_ACTIVE_BUFFER_MGMT_NIC,
538 .name = "abm",
539
540 .init = nfp_abm_init,
541 .clean = nfp_abm_clean,
542
543 .vnic_alloc = nfp_abm_vnic_alloc,
544 .vnic_free = nfp_abm_vnic_free,
545 .vnic_init = nfp_abm_vnic_init,
546
547 .port_get_stats = nfp_abm_port_get_stats,
548 .port_get_stats_count = nfp_abm_port_get_stats_count,
549 .port_get_stats_strings = nfp_abm_port_get_stats_strings,
550
551 .setup_tc = nfp_abm_setup_tc,
552
553 .eswitch_mode_get = nfp_abm_eswitch_mode_get,
554 .eswitch_mode_set = nfp_abm_eswitch_mode_set,
555
556 .dev_get = nfp_abm_repr_get,
557};
558
