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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
23#include "bnxt_hsi.h"
24#include "bnxt.h"
25#include "bnxt_ulp.h"
26
27static int bnxt_register_dev(struct bnxt_en_dev *edev, int ulp_id,
28 struct bnxt_ulp_ops *ulp_ops, void *handle)
29{
30 struct net_device *dev = edev->net;
31 struct bnxt *bp = netdev_priv(dev);
32 struct bnxt_ulp *ulp;
33
34 ASSERT_RTNL();
35 if (ulp_id >= BNXT_MAX_ULP)
36 return -EINVAL;
37
38 ulp = &edev->ulp_tbl[ulp_id];
39 if (rcu_access_pointer(ulp->ulp_ops)) {
40 netdev_err(bp->dev, "ulp id %d already registered\n", ulp_id);
41 return -EBUSY;
42 }
43 if (ulp_id == BNXT_ROCE_ULP) {
44 unsigned int max_stat_ctxs;
45
46 max_stat_ctxs = bnxt_get_max_func_stat_ctxs(bp);
47 if (max_stat_ctxs <= BNXT_MIN_ROCE_STAT_CTXS ||
48 bp->num_stat_ctxs == max_stat_ctxs)
49 return -ENOMEM;
50 bnxt_set_max_func_stat_ctxs(bp, max_stat_ctxs -
51 BNXT_MIN_ROCE_STAT_CTXS);
52 }
53
54 atomic_set(&ulp->ref_count, 0);
55 ulp->handle = handle;
56 rcu_assign_pointer(ulp->ulp_ops, ulp_ops);
57
58 if (ulp_id == BNXT_ROCE_ULP) {
59 if (test_bit(BNXT_STATE_OPEN, &bp->state))
60 bnxt_hwrm_vnic_cfg(bp, 0);
61 }
62
63 return 0;
64}
65
66static int bnxt_unregister_dev(struct bnxt_en_dev *edev, int ulp_id)
67{
68 struct net_device *dev = edev->net;
69 struct bnxt *bp = netdev_priv(dev);
70 struct bnxt_ulp *ulp;
71 int i = 0;
72
73 ASSERT_RTNL();
74 if (ulp_id >= BNXT_MAX_ULP)
75 return -EINVAL;
76
77 ulp = &edev->ulp_tbl[ulp_id];
78 if (!rcu_access_pointer(ulp->ulp_ops)) {
79 netdev_err(bp->dev, "ulp id %d not registered\n", ulp_id);
80 return -EINVAL;
81 }
82 if (ulp_id == BNXT_ROCE_ULP) {
83 unsigned int max_stat_ctxs;
84
85 max_stat_ctxs = bnxt_get_max_func_stat_ctxs(bp);
86 bnxt_set_max_func_stat_ctxs(bp, max_stat_ctxs + 1);
87 if (ulp->msix_requested)
88 edev->en_ops->bnxt_free_msix(edev, ulp_id);
89 }
90 if (ulp->max_async_event_id)
91 bnxt_hwrm_func_rgtr_async_events(bp, NULL, 0);
92
93 RCU_INIT_POINTER(ulp->ulp_ops, NULL);
94 synchronize_rcu();
95 ulp->max_async_event_id = 0;
96 ulp->async_events_bmap = NULL;
97 while (atomic_read(&ulp->ref_count) != 0 && i < 10) {
98 msleep(100);
99 i++;
100 }
101 return 0;
102}
103
104static void bnxt_fill_msix_vecs(struct bnxt *bp, struct bnxt_msix_entry *ent)
105{
106 struct bnxt_en_dev *edev = bp->edev;
107 int num_msix, idx, i;
108
109 num_msix = edev->ulp_tbl[BNXT_ROCE_ULP].msix_requested;
110 idx = edev->ulp_tbl[BNXT_ROCE_ULP].msix_base;
111 for (i = 0; i < num_msix; i++) {
112 ent[i].vector = bp->irq_tbl[idx + i].vector;
113 ent[i].ring_idx = idx + i;
114 ent[i].db_offset = (idx + i) * 0x80;
115 }
116}
117
118static int bnxt_req_msix_vecs(struct bnxt_en_dev *edev, int ulp_id,
119 struct bnxt_msix_entry *ent, int num_msix)
120{
121 struct net_device *dev = edev->net;
122 struct bnxt *bp = netdev_priv(dev);
123 int max_idx, max_cp_rings;
124 int avail_msix, idx;
125 int rc = 0;
126
127 ASSERT_RTNL();
128 if (ulp_id != BNXT_ROCE_ULP)
129 return -EINVAL;
130
131 if (!(bp->flags & BNXT_FLAG_USING_MSIX))
132 return -ENODEV;
133
134 if (edev->ulp_tbl[ulp_id].msix_requested)
135 return -EAGAIN;
136
137 max_cp_rings = bnxt_get_max_func_cp_rings(bp);
138 avail_msix = bnxt_get_avail_msix(bp, num_msix);
139 if (!avail_msix)
140 return -ENOMEM;
141 if (avail_msix > num_msix)
142 avail_msix = num_msix;
143
144 if (bp->flags & BNXT_FLAG_NEW_RM) {
145 idx = bp->cp_nr_rings;
146 } else {
147 max_idx = min_t(int, bp->total_irqs, max_cp_rings);
148 idx = max_idx - avail_msix;
149 }
150 edev->ulp_tbl[ulp_id].msix_base = idx;
151 edev->ulp_tbl[ulp_id].msix_requested = avail_msix;
152 if (bp->total_irqs < (idx + avail_msix)) {
153 if (netif_running(dev)) {
154 bnxt_close_nic(bp, true, false);
155 rc = bnxt_open_nic(bp, true, false);
156 } else {
157 rc = bnxt_reserve_rings(bp);
158 }
159 }
160 if (rc) {
161 edev->ulp_tbl[ulp_id].msix_requested = 0;
162 return -EAGAIN;
163 }
164
165 if (bp->flags & BNXT_FLAG_NEW_RM) {
166 struct bnxt_hw_resc *hw_resc = &bp->hw_resc;
167
168 avail_msix = hw_resc->resv_cp_rings - bp->cp_nr_rings;
169 edev->ulp_tbl[ulp_id].msix_requested = avail_msix;
170 }
171 bnxt_fill_msix_vecs(bp, ent);
172 bnxt_set_max_func_irqs(bp, bnxt_get_max_func_irqs(bp) - avail_msix);
173 bnxt_set_max_func_cp_rings(bp, max_cp_rings - avail_msix);
174 edev->flags |= BNXT_EN_FLAG_MSIX_REQUESTED;
175 return avail_msix;
176}
177
178static int bnxt_free_msix_vecs(struct bnxt_en_dev *edev, int ulp_id)
179{
180 struct net_device *dev = edev->net;
181 struct bnxt *bp = netdev_priv(dev);
182 int max_cp_rings, msix_requested;
183
184 ASSERT_RTNL();
185 if (ulp_id != BNXT_ROCE_ULP)
186 return -EINVAL;
187
188 if (!(edev->flags & BNXT_EN_FLAG_MSIX_REQUESTED))
189 return 0;
190
191 max_cp_rings = bnxt_get_max_func_cp_rings(bp);
192 msix_requested = edev->ulp_tbl[ulp_id].msix_requested;
193 bnxt_set_max_func_cp_rings(bp, max_cp_rings + msix_requested);
194 edev->ulp_tbl[ulp_id].msix_requested = 0;
195 bnxt_set_max_func_irqs(bp, bnxt_get_max_func_irqs(bp) + msix_requested);
196 edev->flags &= ~BNXT_EN_FLAG_MSIX_REQUESTED;
197 if (netif_running(dev)) {
198 bnxt_close_nic(bp, true, false);
199 bnxt_open_nic(bp, true, false);
200 }
201 return 0;
202}
203
204int bnxt_get_ulp_msix_num(struct bnxt *bp)
205{
206 if (bnxt_ulp_registered(bp->edev, BNXT_ROCE_ULP)) {
207 struct bnxt_en_dev *edev = bp->edev;
208
209 return edev->ulp_tbl[BNXT_ROCE_ULP].msix_requested;
210 }
211 return 0;
212}
213
214int bnxt_get_ulp_msix_base(struct bnxt *bp)
215{
216 if (bnxt_ulp_registered(bp->edev, BNXT_ROCE_ULP)) {
217 struct bnxt_en_dev *edev = bp->edev;
218
219 if (edev->ulp_tbl[BNXT_ROCE_ULP].msix_requested)
220 return edev->ulp_tbl[BNXT_ROCE_ULP].msix_base;
221 }
222 return 0;
223}
224
225void bnxt_subtract_ulp_resources(struct bnxt *bp, int ulp_id)
226{
227 ASSERT_RTNL();
228 if (bnxt_ulp_registered(bp->edev, ulp_id)) {
229 struct bnxt_en_dev *edev = bp->edev;
230 unsigned int msix_req, max;
231
232 msix_req = edev->ulp_tbl[ulp_id].msix_requested;
233 max = bnxt_get_max_func_cp_rings(bp);
234 bnxt_set_max_func_cp_rings(bp, max - msix_req);
235 max = bnxt_get_max_func_stat_ctxs(bp);
236 bnxt_set_max_func_stat_ctxs(bp, max - 1);
237 }
238}
239
240static int bnxt_send_msg(struct bnxt_en_dev *edev, int ulp_id,
241 struct bnxt_fw_msg *fw_msg)
242{
243 struct net_device *dev = edev->net;
244 struct bnxt *bp = netdev_priv(dev);
245 struct input *req;
246 int rc;
247
248 mutex_lock(&bp->hwrm_cmd_lock);
249 req = fw_msg->msg;
250 req->resp_addr = cpu_to_le64(bp->hwrm_cmd_resp_dma_addr);
251 rc = _hwrm_send_message(bp, fw_msg->msg, fw_msg->msg_len,
252 fw_msg->timeout);
253 if (!rc) {
254 struct output *resp = bp->hwrm_cmd_resp_addr;
255 u32 len = le16_to_cpu(resp->resp_len);
256
257 if (fw_msg->resp_max_len < len)
258 len = fw_msg->resp_max_len;
259
260 memcpy(fw_msg->resp, resp, len);
261 }
262 mutex_unlock(&bp->hwrm_cmd_lock);
263 return rc;
264}
265
266static void bnxt_ulp_get(struct bnxt_ulp *ulp)
267{
268 atomic_inc(&ulp->ref_count);
269}
270
271static void bnxt_ulp_put(struct bnxt_ulp *ulp)
272{
273 atomic_dec(&ulp->ref_count);
274}
275
276void bnxt_ulp_stop(struct bnxt *bp)
277{
278 struct bnxt_en_dev *edev = bp->edev;
279 struct bnxt_ulp_ops *ops;
280 int i;
281
282 if (!edev)
283 return;
284
285 for (i = 0; i < BNXT_MAX_ULP; i++) {
286 struct bnxt_ulp *ulp = &edev->ulp_tbl[i];
287
288 ops = rtnl_dereference(ulp->ulp_ops);
289 if (!ops || !ops->ulp_stop)
290 continue;
291 ops->ulp_stop(ulp->handle);
292 }
293}
294
295void bnxt_ulp_start(struct bnxt *bp)
296{
297 struct bnxt_en_dev *edev = bp->edev;
298 struct bnxt_ulp_ops *ops;
299 int i;
300
301 if (!edev)
302 return;
303
304 for (i = 0; i < BNXT_MAX_ULP; i++) {
305 struct bnxt_ulp *ulp = &edev->ulp_tbl[i];
306
307 ops = rtnl_dereference(ulp->ulp_ops);
308 if (!ops || !ops->ulp_start)
309 continue;
310 ops->ulp_start(ulp->handle);
311 }
312}
313
314void bnxt_ulp_sriov_cfg(struct bnxt *bp, int num_vfs)
315{
316 struct bnxt_en_dev *edev = bp->edev;
317 struct bnxt_ulp_ops *ops;
318 int i;
319
320 if (!edev)
321 return;
322
323 for (i = 0; i < BNXT_MAX_ULP; i++) {
324 struct bnxt_ulp *ulp = &edev->ulp_tbl[i];
325
326 rcu_read_lock();
327 ops = rcu_dereference(ulp->ulp_ops);
328 if (!ops || !ops->ulp_sriov_config) {
329 rcu_read_unlock();
330 continue;
331 }
332 bnxt_ulp_get(ulp);
333 rcu_read_unlock();
334 ops->ulp_sriov_config(ulp->handle, num_vfs);
335 bnxt_ulp_put(ulp);
336 }
337}
338
339void bnxt_ulp_shutdown(struct bnxt *bp)
340{
341 struct bnxt_en_dev *edev = bp->edev;
342 struct bnxt_ulp_ops *ops;
343 int i;
344
345 if (!edev)
346 return;
347
348 for (i = 0; i < BNXT_MAX_ULP; i++) {
349 struct bnxt_ulp *ulp = &edev->ulp_tbl[i];
350
351 ops = rtnl_dereference(ulp->ulp_ops);
352 if (!ops || !ops->ulp_shutdown)
353 continue;
354 ops->ulp_shutdown(ulp->handle);
355 }
356}
357
358void bnxt_ulp_irq_stop(struct bnxt *bp)
359{
360 struct bnxt_en_dev *edev = bp->edev;
361 struct bnxt_ulp_ops *ops;
362
363 if (!edev || !(edev->flags & BNXT_EN_FLAG_MSIX_REQUESTED))
364 return;
365
366 if (bnxt_ulp_registered(bp->edev, BNXT_ROCE_ULP)) {
367 struct bnxt_ulp *ulp = &edev->ulp_tbl[BNXT_ROCE_ULP];
368
369 if (!ulp->msix_requested)
370 return;
371
372 ops = rtnl_dereference(ulp->ulp_ops);
373 if (!ops || !ops->ulp_irq_stop)
374 return;
375 ops->ulp_irq_stop(ulp->handle);
376 }
377}
378
379void bnxt_ulp_irq_restart(struct bnxt *bp, int err)
380{
381 struct bnxt_en_dev *edev = bp->edev;
382 struct bnxt_ulp_ops *ops;
383
384 if (!edev || !(edev->flags & BNXT_EN_FLAG_MSIX_REQUESTED))
385 return;
386
387 if (bnxt_ulp_registered(bp->edev, BNXT_ROCE_ULP)) {
388 struct bnxt_ulp *ulp = &edev->ulp_tbl[BNXT_ROCE_ULP];
389 struct bnxt_msix_entry *ent = NULL;
390
391 if (!ulp->msix_requested)
392 return;
393
394 ops = rtnl_dereference(ulp->ulp_ops);
395 if (!ops || !ops->ulp_irq_restart)
396 return;
397
398 if (!err) {
399 ent = kcalloc(ulp->msix_requested, sizeof(*ent),
400 GFP_KERNEL);
401 if (!ent)
402 return;
403 bnxt_fill_msix_vecs(bp, ent);
404 }
405 ops->ulp_irq_restart(ulp->handle, ent);
406 kfree(ent);
407 }
408}
409
410void bnxt_ulp_async_events(struct bnxt *bp, struct hwrm_async_event_cmpl *cmpl)
411{
412 u16 event_id = le16_to_cpu(cmpl->event_id);
413 struct bnxt_en_dev *edev = bp->edev;
414 struct bnxt_ulp_ops *ops;
415 int i;
416
417 if (!edev)
418 return;
419
420 rcu_read_lock();
421 for (i = 0; i < BNXT_MAX_ULP; i++) {
422 struct bnxt_ulp *ulp = &edev->ulp_tbl[i];
423
424 ops = rcu_dereference(ulp->ulp_ops);
425 if (!ops || !ops->ulp_async_notifier)
426 continue;
427 if (!ulp->async_events_bmap ||
428 event_id > ulp->max_async_event_id)
429 continue;
430
431
432 smp_rmb();
433 if (test_bit(event_id, ulp->async_events_bmap))
434 ops->ulp_async_notifier(ulp->handle, cmpl);
435 }
436 rcu_read_unlock();
437}
438
439static int bnxt_register_async_events(struct bnxt_en_dev *edev, int ulp_id,
440 unsigned long *events_bmap, u16 max_id)
441{
442 struct net_device *dev = edev->net;
443 struct bnxt *bp = netdev_priv(dev);
444 struct bnxt_ulp *ulp;
445
446 if (ulp_id >= BNXT_MAX_ULP)
447 return -EINVAL;
448
449 ulp = &edev->ulp_tbl[ulp_id];
450 ulp->async_events_bmap = events_bmap;
451
452 smp_wmb();
453 ulp->max_async_event_id = max_id;
454 bnxt_hwrm_func_rgtr_async_events(bp, events_bmap, max_id + 1);
455 return 0;
456}
457
458static const struct bnxt_en_ops bnxt_en_ops_tbl = {
459 .bnxt_register_device = bnxt_register_dev,
460 .bnxt_unregister_device = bnxt_unregister_dev,
461 .bnxt_request_msix = bnxt_req_msix_vecs,
462 .bnxt_free_msix = bnxt_free_msix_vecs,
463 .bnxt_send_fw_msg = bnxt_send_msg,
464 .bnxt_register_fw_async_events = bnxt_register_async_events,
465};
466
467struct bnxt_en_dev *bnxt_ulp_probe(struct net_device *dev)
468{
469 struct bnxt *bp = netdev_priv(dev);
470 struct bnxt_en_dev *edev;
471
472 edev = bp->edev;
473 if (!edev) {
474 edev = kzalloc(sizeof(*edev), GFP_KERNEL);
475 if (!edev)
476 return ERR_PTR(-ENOMEM);
477 edev->en_ops = &bnxt_en_ops_tbl;
478 if (bp->flags & BNXT_FLAG_ROCEV1_CAP)
479 edev->flags |= BNXT_EN_FLAG_ROCEV1_CAP;
480 if (bp->flags & BNXT_FLAG_ROCEV2_CAP)
481 edev->flags |= BNXT_EN_FLAG_ROCEV2_CAP;
482 edev->net = dev;
483 edev->pdev = bp->pdev;
484 bp->edev = edev;
485 }
486 return bp->edev;
487}
488
