1 /* Broadcom NetXtreme-C/E network driver.
2 *
3 * Copyright (c) 2016-2018 Broadcom Limited
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation.
8 */
9
10 #include <linux/module.h>
11
12 #include <linux/kernel.h>
13 #include <linux/errno.h>
14 #include <linux/interrupt.h>
15 #include <linux/pci.h>
16 #include <linux/netdevice.h>
17 #include <linux/rtnetlink.h>
18 #include <linux/bitops.h>
19 #include <linux/irq.h>
20 #include <asm/byteorder.h>
21 #include <linux/bitmap.h>
22 #include <linux/auxiliary_bus.h>
23 #include <net/netdev_lock.h>
24
25 #include "bnxt_hsi.h"
26 #include "bnxt.h"
27 #include "bnxt_hwrm.h"
28 #include "bnxt_ulp.h"
29
30 static DEFINE_IDA(bnxt_aux_dev_ids);
31
bnxt_fill_msix_vecs(struct bnxt * bp,struct bnxt_msix_entry * ent)32 static void bnxt_fill_msix_vecs(struct bnxt *bp, struct bnxt_msix_entry *ent)
33 {
34 struct bnxt_en_dev *edev = bp->edev;
35 int num_msix, i;
36
37 if (!edev->ulp_tbl->msix_requested) {
38 netdev_warn(bp->dev, "Requested MSI-X vectors insufficient\n");
39 return;
40 }
41 num_msix = edev->ulp_tbl->msix_requested;
42 for (i = 0; i < num_msix; i++) {
43 ent[i].vector = bp->irq_tbl[i].vector;
44 ent[i].ring_idx = i;
45 if (bp->flags & BNXT_FLAG_CHIP_P5_PLUS)
46 ent[i].db_offset = bp->db_offset;
47 else
48 ent[i].db_offset = i * 0x80;
49 }
50 }
51
bnxt_get_ulp_msix_num(struct bnxt * bp)52 int bnxt_get_ulp_msix_num(struct bnxt *bp)
53 {
54 if (bp->edev)
55 return bp->edev->ulp_num_msix_vec;
56 return 0;
57 }
58
bnxt_set_ulp_msix_num(struct bnxt * bp,int num)59 void bnxt_set_ulp_msix_num(struct bnxt *bp, int num)
60 {
61 if (bp->edev)
62 bp->edev->ulp_num_msix_vec = num;
63 }
64
bnxt_get_ulp_msix_num_in_use(struct bnxt * bp)65 int bnxt_get_ulp_msix_num_in_use(struct bnxt *bp)
66 {
67 if (bnxt_ulp_registered(bp->edev))
68 return bp->edev->ulp_num_msix_vec;
69 return 0;
70 }
71
bnxt_get_ulp_stat_ctxs(struct bnxt * bp)72 int bnxt_get_ulp_stat_ctxs(struct bnxt *bp)
73 {
74 if (bp->edev)
75 return bp->edev->ulp_num_ctxs;
76 return 0;
77 }
78
bnxt_set_ulp_stat_ctxs(struct bnxt * bp,int num_ulp_ctx)79 void bnxt_set_ulp_stat_ctxs(struct bnxt *bp, int num_ulp_ctx)
80 {
81 if (bp->edev)
82 bp->edev->ulp_num_ctxs = num_ulp_ctx;
83 }
84
bnxt_get_ulp_stat_ctxs_in_use(struct bnxt * bp)85 int bnxt_get_ulp_stat_ctxs_in_use(struct bnxt *bp)
86 {
87 if (bnxt_ulp_registered(bp->edev))
88 return bp->edev->ulp_num_ctxs;
89 return 0;
90 }
91
bnxt_set_dflt_ulp_stat_ctxs(struct bnxt * bp)92 void bnxt_set_dflt_ulp_stat_ctxs(struct bnxt *bp)
93 {
94 if (bp->edev) {
95 bp->edev->ulp_num_ctxs = BNXT_MIN_ROCE_STAT_CTXS;
96 /* Reserve one additional stat_ctx for PF0 (except
97 * on 1-port NICs) as it also creates one stat_ctx
98 * for PF1 in case of RoCE bonding.
99 */
100 if (BNXT_PF(bp) && !bp->pf.port_id &&
101 bp->port_count > 1)
102 bp->edev->ulp_num_ctxs++;
103 }
104 }
105
bnxt_register_dev(struct bnxt_en_dev * edev,struct bnxt_ulp_ops * ulp_ops,void * handle)106 int bnxt_register_dev(struct bnxt_en_dev *edev,
107 struct bnxt_ulp_ops *ulp_ops,
108 void *handle)
109 {
110 struct net_device *dev = edev->net;
111 struct bnxt *bp = netdev_priv(dev);
112 unsigned int max_stat_ctxs;
113 struct bnxt_ulp *ulp;
114 int rc = 0;
115
116 netdev_lock(dev);
117 mutex_lock(&edev->en_dev_lock);
118 if (!bp->irq_tbl) {
119 rc = -ENODEV;
120 goto exit;
121 }
122 max_stat_ctxs = bnxt_get_max_func_stat_ctxs(bp);
123 if (max_stat_ctxs <= BNXT_MIN_ROCE_STAT_CTXS ||
124 bp->cp_nr_rings == max_stat_ctxs) {
125 rc = -ENOMEM;
126 goto exit;
127 }
128
129 ulp = edev->ulp_tbl;
130 ulp->handle = handle;
131 rcu_assign_pointer(ulp->ulp_ops, ulp_ops);
132
133 if (test_bit(BNXT_STATE_OPEN, &bp->state))
134 bnxt_hwrm_vnic_cfg(bp, &bp->vnic_info[BNXT_VNIC_DEFAULT]);
135
136 edev->ulp_tbl->msix_requested = bnxt_get_ulp_msix_num(bp);
137
138 bnxt_fill_msix_vecs(bp, bp->edev->msix_entries);
139 edev->flags |= BNXT_EN_FLAG_MSIX_REQUESTED;
140 exit:
141 mutex_unlock(&edev->en_dev_lock);
142 netdev_unlock(dev);
143 return rc;
144 }
145 EXPORT_SYMBOL(bnxt_register_dev);
146
bnxt_unregister_dev(struct bnxt_en_dev * edev)147 void bnxt_unregister_dev(struct bnxt_en_dev *edev)
148 {
149 struct net_device *dev = edev->net;
150 struct bnxt *bp = netdev_priv(dev);
151 struct bnxt_ulp *ulp;
152
153 ulp = edev->ulp_tbl;
154 netdev_lock(dev);
155 mutex_lock(&edev->en_dev_lock);
156 if (ulp->msix_requested)
157 edev->flags &= ~BNXT_EN_FLAG_MSIX_REQUESTED;
158 edev->ulp_tbl->msix_requested = 0;
159
160 if (ulp->max_async_event_id)
161 bnxt_hwrm_func_drv_rgtr(bp, NULL, 0, true);
162
163 RCU_INIT_POINTER(ulp->ulp_ops, NULL);
164 synchronize_rcu();
165 ulp->max_async_event_id = 0;
166 ulp->async_events_bmap = NULL;
167 mutex_unlock(&edev->en_dev_lock);
168 netdev_unlock(dev);
169 return;
170 }
171 EXPORT_SYMBOL(bnxt_unregister_dev);
172
bnxt_set_dflt_ulp_msix(struct bnxt * bp)173 static int bnxt_set_dflt_ulp_msix(struct bnxt *bp)
174 {
175 int roce_msix = BNXT_MAX_ROCE_MSIX;
176
177 if (BNXT_VF(bp))
178 roce_msix = BNXT_MAX_ROCE_MSIX_VF;
179 else if (bp->port_partition_type)
180 roce_msix = BNXT_MAX_ROCE_MSIX_NPAR_PF;
181
182 /* NQ MSIX vectors should match the number of CPUs plus 1 more for
183 * the CREQ MSIX, up to the default.
184 */
185 return min_t(int, roce_msix, num_online_cpus() + 1);
186 }
187
bnxt_send_msg(struct bnxt_en_dev * edev,struct bnxt_fw_msg * fw_msg)188 int bnxt_send_msg(struct bnxt_en_dev *edev,
189 struct bnxt_fw_msg *fw_msg)
190 {
191 struct net_device *dev = edev->net;
192 struct bnxt *bp = netdev_priv(dev);
193 struct output *resp;
194 struct input *req;
195 u32 resp_len;
196 int rc;
197
198 if (bp->fw_reset_state)
199 return -EBUSY;
200
201 rc = hwrm_req_init(bp, req, 0 /* don't care */);
202 if (rc)
203 return rc;
204
205 rc = hwrm_req_replace(bp, req, fw_msg->msg, fw_msg->msg_len);
206 if (rc)
207 goto drop_req;
208
209 hwrm_req_timeout(bp, req, fw_msg->timeout);
210 resp = hwrm_req_hold(bp, req);
211 rc = hwrm_req_send(bp, req);
212 resp_len = le16_to_cpu(resp->resp_len);
213 if (resp_len) {
214 if (fw_msg->resp_max_len < resp_len)
215 resp_len = fw_msg->resp_max_len;
216
217 memcpy(fw_msg->resp, resp, resp_len);
218 }
219 drop_req:
220 hwrm_req_drop(bp, req);
221 return rc;
222 }
223 EXPORT_SYMBOL(bnxt_send_msg);
224
bnxt_ulp_stop(struct bnxt * bp)225 void bnxt_ulp_stop(struct bnxt *bp)
226 {
227 struct bnxt_aux_priv *aux_priv = bp->aux_priv;
228 struct bnxt_en_dev *edev = bp->edev;
229
230 if (!edev)
231 return;
232
233 mutex_lock(&edev->en_dev_lock);
234 if (!bnxt_ulp_registered(edev) ||
235 (edev->flags & BNXT_EN_FLAG_ULP_STOPPED))
236 goto ulp_stop_exit;
237
238 edev->flags |= BNXT_EN_FLAG_ULP_STOPPED;
239 if (aux_priv) {
240 struct auxiliary_device *adev;
241
242 adev = &aux_priv->aux_dev;
243 if (adev->dev.driver) {
244 const struct auxiliary_driver *adrv;
245 pm_message_t pm = {};
246
247 adrv = to_auxiliary_drv(adev->dev.driver);
248 edev->en_state = bp->state;
249 adrv->suspend(adev, pm);
250 }
251 }
252 ulp_stop_exit:
253 mutex_unlock(&edev->en_dev_lock);
254 }
255
bnxt_ulp_start(struct bnxt * bp,int err)256 void bnxt_ulp_start(struct bnxt *bp, int err)
257 {
258 struct bnxt_aux_priv *aux_priv = bp->aux_priv;
259 struct bnxt_en_dev *edev = bp->edev;
260
261 if (!edev || err)
262 return;
263
264 mutex_lock(&edev->en_dev_lock);
265 if (!bnxt_ulp_registered(edev) ||
266 !(edev->flags & BNXT_EN_FLAG_ULP_STOPPED))
267 goto ulp_start_exit;
268
269 if (edev->ulp_tbl->msix_requested)
270 bnxt_fill_msix_vecs(bp, edev->msix_entries);
271
272 if (aux_priv) {
273 struct auxiliary_device *adev;
274
275 adev = &aux_priv->aux_dev;
276 if (adev->dev.driver) {
277 const struct auxiliary_driver *adrv;
278
279 adrv = to_auxiliary_drv(adev->dev.driver);
280 edev->en_state = bp->state;
281 adrv->resume(adev);
282 }
283 }
284 ulp_start_exit:
285 edev->flags &= ~BNXT_EN_FLAG_ULP_STOPPED;
286 mutex_unlock(&edev->en_dev_lock);
287 }
288
bnxt_ulp_irq_stop(struct bnxt * bp)289 void bnxt_ulp_irq_stop(struct bnxt *bp)
290 {
291 struct bnxt_en_dev *edev = bp->edev;
292 struct bnxt_ulp_ops *ops;
293 bool reset = false;
294
295 if (!edev || !(edev->flags & BNXT_EN_FLAG_MSIX_REQUESTED))
296 return;
297
298 if (bnxt_ulp_registered(bp->edev)) {
299 struct bnxt_ulp *ulp = edev->ulp_tbl;
300
301 if (!ulp->msix_requested)
302 return;
303
304 ops = netdev_lock_dereference(ulp->ulp_ops, bp->dev);
305 if (!ops || !ops->ulp_irq_stop)
306 return;
307 if (test_bit(BNXT_STATE_FW_RESET_DET, &bp->state))
308 reset = true;
309 ops->ulp_irq_stop(ulp->handle, reset);
310 }
311 }
312
bnxt_ulp_irq_restart(struct bnxt * bp,int err)313 void bnxt_ulp_irq_restart(struct bnxt *bp, int err)
314 {
315 struct bnxt_en_dev *edev = bp->edev;
316 struct bnxt_ulp_ops *ops;
317
318 if (!edev || !(edev->flags & BNXT_EN_FLAG_MSIX_REQUESTED))
319 return;
320
321 if (bnxt_ulp_registered(bp->edev)) {
322 struct bnxt_ulp *ulp = edev->ulp_tbl;
323 struct bnxt_msix_entry *ent = NULL;
324
325 if (!ulp->msix_requested)
326 return;
327
328 ops = netdev_lock_dereference(ulp->ulp_ops, bp->dev);
329 if (!ops || !ops->ulp_irq_restart)
330 return;
331
332 if (!err) {
333 ent = kcalloc(ulp->msix_requested, sizeof(*ent),
334 GFP_KERNEL);
335 if (!ent)
336 return;
337 bnxt_fill_msix_vecs(bp, ent);
338 }
339 ops->ulp_irq_restart(ulp->handle, ent);
340 kfree(ent);
341 }
342 }
343
bnxt_ulp_async_events(struct bnxt * bp,struct hwrm_async_event_cmpl * cmpl)344 void bnxt_ulp_async_events(struct bnxt *bp, struct hwrm_async_event_cmpl *cmpl)
345 {
346 u16 event_id = le16_to_cpu(cmpl->event_id);
347 struct bnxt_en_dev *edev = bp->edev;
348 struct bnxt_ulp_ops *ops;
349 struct bnxt_ulp *ulp;
350
351 if (!bnxt_ulp_registered(edev))
352 return;
353 ulp = edev->ulp_tbl;
354
355 rcu_read_lock();
356
357 ops = rcu_dereference(ulp->ulp_ops);
358 if (!ops || !ops->ulp_async_notifier)
359 goto exit_unlock_rcu;
360 if (!ulp->async_events_bmap || event_id > ulp->max_async_event_id)
361 goto exit_unlock_rcu;
362
363 /* Read max_async_event_id first before testing the bitmap. */
364 smp_rmb();
365
366 if (test_bit(event_id, ulp->async_events_bmap))
367 ops->ulp_async_notifier(ulp->handle, cmpl);
368 exit_unlock_rcu:
369 rcu_read_unlock();
370 }
371
bnxt_register_async_events(struct bnxt_en_dev * edev,unsigned long * events_bmap,u16 max_id)372 void bnxt_register_async_events(struct bnxt_en_dev *edev,
373 unsigned long *events_bmap, u16 max_id)
374 {
375 struct net_device *dev = edev->net;
376 struct bnxt *bp = netdev_priv(dev);
377 struct bnxt_ulp *ulp;
378
379 ulp = edev->ulp_tbl;
380 ulp->async_events_bmap = events_bmap;
381 /* Make sure bnxt_ulp_async_events() sees this order */
382 smp_wmb();
383 ulp->max_async_event_id = max_id;
384 bnxt_hwrm_func_drv_rgtr(bp, events_bmap, max_id + 1, true);
385 }
386 EXPORT_SYMBOL(bnxt_register_async_events);
387
bnxt_rdma_aux_device_uninit(struct bnxt * bp)388 void bnxt_rdma_aux_device_uninit(struct bnxt *bp)
389 {
390 struct bnxt_aux_priv *aux_priv;
391 struct auxiliary_device *adev;
392
393 /* Skip if no auxiliary device init was done. */
394 if (!bp->aux_priv)
395 return;
396
397 aux_priv = bp->aux_priv;
398 adev = &aux_priv->aux_dev;
399 auxiliary_device_uninit(adev);
400 }
401
bnxt_aux_dev_release(struct device * dev)402 static void bnxt_aux_dev_release(struct device *dev)
403 {
404 struct bnxt_aux_priv *aux_priv =
405 container_of(dev, struct bnxt_aux_priv, aux_dev.dev);
406 struct bnxt *bp = netdev_priv(aux_priv->edev->net);
407
408 ida_free(&bnxt_aux_dev_ids, aux_priv->id);
409 kfree(aux_priv->edev->ulp_tbl);
410 bp->edev = NULL;
411 kfree(aux_priv->edev);
412 kfree(aux_priv);
413 bp->aux_priv = NULL;
414 }
415
bnxt_rdma_aux_device_del(struct bnxt * bp)416 void bnxt_rdma_aux_device_del(struct bnxt *bp)
417 {
418 if (!bp->edev)
419 return;
420
421 auxiliary_device_delete(&bp->aux_priv->aux_dev);
422 }
423
bnxt_set_edev_info(struct bnxt_en_dev * edev,struct bnxt * bp)424 static void bnxt_set_edev_info(struct bnxt_en_dev *edev, struct bnxt *bp)
425 {
426 edev->net = bp->dev;
427 edev->pdev = bp->pdev;
428 edev->l2_db_size = bp->db_size;
429 edev->l2_db_size_nc = bp->db_size;
430 edev->l2_db_offset = bp->db_offset;
431 mutex_init(&edev->en_dev_lock);
432
433 if (bp->flags & BNXT_FLAG_ROCEV1_CAP)
434 edev->flags |= BNXT_EN_FLAG_ROCEV1_CAP;
435 if (bp->flags & BNXT_FLAG_ROCEV2_CAP)
436 edev->flags |= BNXT_EN_FLAG_ROCEV2_CAP;
437 if (bp->flags & BNXT_FLAG_VF)
438 edev->flags |= BNXT_EN_FLAG_VF;
439 if (BNXT_ROCE_VF_RESC_CAP(bp))
440 edev->flags |= BNXT_EN_FLAG_ROCE_VF_RES_MGMT;
441 if (BNXT_SW_RES_LMT(bp))
442 edev->flags |= BNXT_EN_FLAG_SW_RES_LMT;
443
444 edev->chip_num = bp->chip_num;
445 edev->hw_ring_stats_size = bp->hw_ring_stats_size;
446 edev->pf_port_id = bp->pf.port_id;
447 edev->en_state = bp->state;
448 edev->bar0 = bp->bar0;
449 }
450
bnxt_rdma_aux_device_add(struct bnxt * bp)451 void bnxt_rdma_aux_device_add(struct bnxt *bp)
452 {
453 struct auxiliary_device *aux_dev;
454 int rc;
455
456 if (!bp->edev)
457 return;
458
459 aux_dev = &bp->aux_priv->aux_dev;
460 rc = auxiliary_device_add(aux_dev);
461 if (rc) {
462 netdev_warn(bp->dev, "Failed to add auxiliary device for ROCE\n");
463 auxiliary_device_uninit(aux_dev);
464 bp->flags &= ~BNXT_FLAG_ROCE_CAP;
465 }
466 }
467
bnxt_rdma_aux_device_init(struct bnxt * bp)468 void bnxt_rdma_aux_device_init(struct bnxt *bp)
469 {
470 struct auxiliary_device *aux_dev;
471 struct bnxt_aux_priv *aux_priv;
472 struct bnxt_en_dev *edev;
473 struct bnxt_ulp *ulp;
474 int rc;
475
476 if (!(bp->flags & BNXT_FLAG_ROCE_CAP))
477 return;
478
479 aux_priv = kzalloc(sizeof(*bp->aux_priv), GFP_KERNEL);
480 if (!aux_priv)
481 goto exit;
482
483 aux_priv->id = ida_alloc(&bnxt_aux_dev_ids, GFP_KERNEL);
484 if (aux_priv->id < 0) {
485 netdev_warn(bp->dev,
486 "ida alloc failed for ROCE auxiliary device\n");
487 kfree(aux_priv);
488 goto exit;
489 }
490
491 aux_dev = &aux_priv->aux_dev;
492 aux_dev->id = aux_priv->id;
493 aux_dev->name = "rdma";
494 aux_dev->dev.parent = &bp->pdev->dev;
495 aux_dev->dev.release = bnxt_aux_dev_release;
496
497 rc = auxiliary_device_init(aux_dev);
498 if (rc) {
499 ida_free(&bnxt_aux_dev_ids, aux_priv->id);
500 kfree(aux_priv);
501 goto exit;
502 }
503 bp->aux_priv = aux_priv;
504
505 /* From this point, all cleanup will happen via the .release callback &
506 * any error unwinding will need to include a call to
507 * auxiliary_device_uninit.
508 */
509 edev = kzalloc(sizeof(*edev), GFP_KERNEL);
510 if (!edev)
511 goto aux_dev_uninit;
512
513 aux_priv->edev = edev;
514
515 ulp = kzalloc(sizeof(*ulp), GFP_KERNEL);
516 if (!ulp)
517 goto aux_dev_uninit;
518
519 edev->ulp_tbl = ulp;
520 bp->edev = edev;
521 bnxt_set_edev_info(edev, bp);
522 bp->ulp_num_msix_want = bnxt_set_dflt_ulp_msix(bp);
523
524 return;
525
526 aux_dev_uninit:
527 auxiliary_device_uninit(aux_dev);
528 exit:
529 bp->flags &= ~BNXT_FLAG_ROCE_CAP;
530 }
531