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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->cp_nr_rings == max_stat_ctxs)
49 return -ENOMEM;
50 }
51
52 atomic_set(&ulp->ref_count, 0);
53 ulp->handle = handle;
54 rcu_assign_pointer(ulp->ulp_ops, ulp_ops);
55
56 if (ulp_id == BNXT_ROCE_ULP) {
57 if (test_bit(BNXT_STATE_OPEN, &bp->state))
58 bnxt_hwrm_vnic_cfg(bp, 0);
59 }
60
61 return 0;
62}
63
64static int bnxt_unregister_dev(struct bnxt_en_dev *edev, int ulp_id)
65{
66 struct net_device *dev = edev->net;
67 struct bnxt *bp = netdev_priv(dev);
68 struct bnxt_ulp *ulp;
69 int i = 0;
70
71 ASSERT_RTNL();
72 if (ulp_id >= BNXT_MAX_ULP)
73 return -EINVAL;
74
75 ulp = &edev->ulp_tbl[ulp_id];
76 if (!rcu_access_pointer(ulp->ulp_ops)) {
77 netdev_err(bp->dev, "ulp id %d not registered\n", ulp_id);
78 return -EINVAL;
79 }
80 if (ulp_id == BNXT_ROCE_ULP && ulp->msix_requested)
81 edev->en_ops->bnxt_free_msix(edev, ulp_id);
82
83 if (ulp->max_async_event_id)
84 bnxt_hwrm_func_drv_rgtr(bp, NULL, 0, true);
85
86 RCU_INIT_POINTER(ulp->ulp_ops, NULL);
87 synchronize_rcu();
88 ulp->max_async_event_id = 0;
89 ulp->async_events_bmap = NULL;
90 while (atomic_read(&ulp->ref_count) != 0 && i < 10) {
91 msleep(100);
92 i++;
93 }
94 return 0;
95}
96
97static void bnxt_fill_msix_vecs(struct bnxt *bp, struct bnxt_msix_entry *ent)
98{
99 struct bnxt_en_dev *edev = bp->edev;
100 int num_msix, idx, i;
101
102 num_msix = edev->ulp_tbl[BNXT_ROCE_ULP].msix_requested;
103 idx = edev->ulp_tbl[BNXT_ROCE_ULP].msix_base;
104 for (i = 0; i < num_msix; i++) {
105 ent[i].vector = bp->irq_tbl[idx + i].vector;
106 ent[i].ring_idx = idx + i;
107 if (bp->flags & BNXT_FLAG_CHIP_P5) {
108 ent[i].db_offset = DB_PF_OFFSET_P5;
109 if (BNXT_VF(bp))
110 ent[i].db_offset = DB_VF_OFFSET_P5;
111 } else {
112 ent[i].db_offset = (idx + i) * 0x80;
113 }
114 }
115}
116
117static int bnxt_req_msix_vecs(struct bnxt_en_dev *edev, int ulp_id,
118 struct bnxt_msix_entry *ent, int num_msix)
119{
120 struct net_device *dev = edev->net;
121 struct bnxt *bp = netdev_priv(dev);
122 struct bnxt_hw_resc *hw_resc;
123 int max_idx, max_cp_rings;
124 int avail_msix, idx;
125 int total_vecs;
126 int rc = 0;
127
128 ASSERT_RTNL();
129 if (ulp_id != BNXT_ROCE_ULP)
130 return -EINVAL;
131
132 if (!(bp->flags & BNXT_FLAG_USING_MSIX))
133 return -ENODEV;
134
135 if (edev->ulp_tbl[ulp_id].msix_requested)
136 return -EAGAIN;
137
138 max_cp_rings = bnxt_get_max_func_cp_rings(bp);
139 avail_msix = bnxt_get_avail_msix(bp, num_msix);
140 if (!avail_msix)
141 return -ENOMEM;
142 if (avail_msix > num_msix)
143 avail_msix = num_msix;
144
145 if (BNXT_NEW_RM(bp)) {
146 idx = bp->cp_nr_rings;
147 } else {
148 max_idx = min_t(int, bp->total_irqs, max_cp_rings);
149 idx = max_idx - avail_msix;
150 }
151 edev->ulp_tbl[ulp_id].msix_base = idx;
152 edev->ulp_tbl[ulp_id].msix_requested = avail_msix;
153 hw_resc = &bp->hw_resc;
154 total_vecs = idx + avail_msix;
155 if (bp->total_irqs < total_vecs ||
156 (BNXT_NEW_RM(bp) && hw_resc->resv_irqs < total_vecs)) {
157 if (netif_running(dev)) {
158 bnxt_close_nic(bp, true, false);
159 rc = bnxt_open_nic(bp, true, false);
160 } else {
161 rc = bnxt_reserve_rings(bp, true);
162 }
163 }
164 if (rc) {
165 edev->ulp_tbl[ulp_id].msix_requested = 0;
166 return -EAGAIN;
167 }
168
169 if (BNXT_NEW_RM(bp)) {
170 int resv_msix;
171
172 resv_msix = hw_resc->resv_irqs - bp->cp_nr_rings;
173 avail_msix = min_t(int, resv_msix, avail_msix);
174 edev->ulp_tbl[ulp_id].msix_requested = avail_msix;
175 }
176 bnxt_fill_msix_vecs(bp, ent);
177 edev->flags |= BNXT_EN_FLAG_MSIX_REQUESTED;
178 return avail_msix;
179}
180
181static int bnxt_free_msix_vecs(struct bnxt_en_dev *edev, int ulp_id)
182{
183 struct net_device *dev = edev->net;
184 struct bnxt *bp = netdev_priv(dev);
185
186 ASSERT_RTNL();
187 if (ulp_id != BNXT_ROCE_ULP)
188 return -EINVAL;
189
190 if (!(edev->flags & BNXT_EN_FLAG_MSIX_REQUESTED))
191 return 0;
192
193 edev->ulp_tbl[ulp_id].msix_requested = 0;
194 edev->flags &= ~BNXT_EN_FLAG_MSIX_REQUESTED;
195 if (netif_running(dev) && !(edev->flags & BNXT_EN_FLAG_ULP_STOPPED)) {
196 bnxt_close_nic(bp, true, false);
197 bnxt_open_nic(bp, true, false);
198 }
199 return 0;
200}
201
202int bnxt_get_ulp_msix_num(struct bnxt *bp)
203{
204 if (bnxt_ulp_registered(bp->edev, BNXT_ROCE_ULP)) {
205 struct bnxt_en_dev *edev = bp->edev;
206
207 return edev->ulp_tbl[BNXT_ROCE_ULP].msix_requested;
208 }
209 return 0;
210}
211
212int bnxt_get_ulp_msix_base(struct bnxt *bp)
213{
214 if (bnxt_ulp_registered(bp->edev, BNXT_ROCE_ULP)) {
215 struct bnxt_en_dev *edev = bp->edev;
216
217 if (edev->ulp_tbl[BNXT_ROCE_ULP].msix_requested)
218 return edev->ulp_tbl[BNXT_ROCE_ULP].msix_base;
219 }
220 return 0;
221}
222
223int bnxt_get_ulp_stat_ctxs(struct bnxt *bp)
224{
225 if (bnxt_ulp_registered(bp->edev, BNXT_ROCE_ULP)) {
226 struct bnxt_en_dev *edev = bp->edev;
227
228 if (edev->ulp_tbl[BNXT_ROCE_ULP].msix_requested)
229 return BNXT_MIN_ROCE_STAT_CTXS;
230 }
231
232 return 0;
233}
234
235static int bnxt_send_msg(struct bnxt_en_dev *edev, int ulp_id,
236 struct bnxt_fw_msg *fw_msg)
237{
238 struct net_device *dev = edev->net;
239 struct bnxt *bp = netdev_priv(dev);
240 struct input *req;
241 int rc;
242
243 if (ulp_id != BNXT_ROCE_ULP && bp->fw_reset_state)
244 return -EBUSY;
245
246 mutex_lock(&bp->hwrm_cmd_lock);
247 req = fw_msg->msg;
248 req->resp_addr = cpu_to_le64(bp->hwrm_cmd_resp_dma_addr);
249 rc = _hwrm_send_message(bp, fw_msg->msg, fw_msg->msg_len,
250 fw_msg->timeout);
251 if (!rc) {
252 struct output *resp = bp->hwrm_cmd_resp_addr;
253 u32 len = le16_to_cpu(resp->resp_len);
254
255 if (fw_msg->resp_max_len < len)
256 len = fw_msg->resp_max_len;
257
258 memcpy(fw_msg->resp, resp, len);
259 }
260 mutex_unlock(&bp->hwrm_cmd_lock);
261 return rc;
262}
263
264static void bnxt_ulp_get(struct bnxt_ulp *ulp)
265{
266 atomic_inc(&ulp->ref_count);
267}
268
269static void bnxt_ulp_put(struct bnxt_ulp *ulp)
270{
271 atomic_dec(&ulp->ref_count);
272}
273
274void bnxt_ulp_stop(struct bnxt *bp)
275{
276 struct bnxt_en_dev *edev = bp->edev;
277 struct bnxt_ulp_ops *ops;
278 int i;
279
280 if (!edev)
281 return;
282
283 edev->flags |= BNXT_EN_FLAG_ULP_STOPPED;
284 for (i = 0; i < BNXT_MAX_ULP; i++) {
285 struct bnxt_ulp *ulp = &edev->ulp_tbl[i];
286
287 ops = rtnl_dereference(ulp->ulp_ops);
288 if (!ops || !ops->ulp_stop)
289 continue;
290 ops->ulp_stop(ulp->handle);
291 }
292}
293
294void bnxt_ulp_start(struct bnxt *bp, int err)
295{
296 struct bnxt_en_dev *edev = bp->edev;
297 struct bnxt_ulp_ops *ops;
298 int i;
299
300 if (!edev)
301 return;
302
303 edev->flags &= ~BNXT_EN_FLAG_ULP_STOPPED;
304
305 if (err)
306 return;
307
308 for (i = 0; i < BNXT_MAX_ULP; i++) {
309 struct bnxt_ulp *ulp = &edev->ulp_tbl[i];
310
311 ops = rtnl_dereference(ulp->ulp_ops);
312 if (!ops || !ops->ulp_start)
313 continue;
314 ops->ulp_start(ulp->handle);
315 }
316}
317
318void bnxt_ulp_sriov_cfg(struct bnxt *bp, int num_vfs)
319{
320 struct bnxt_en_dev *edev = bp->edev;
321 struct bnxt_ulp_ops *ops;
322 int i;
323
324 if (!edev)
325 return;
326
327 for (i = 0; i < BNXT_MAX_ULP; i++) {
328 struct bnxt_ulp *ulp = &edev->ulp_tbl[i];
329
330 rcu_read_lock();
331 ops = rcu_dereference(ulp->ulp_ops);
332 if (!ops || !ops->ulp_sriov_config) {
333 rcu_read_unlock();
334 continue;
335 }
336 bnxt_ulp_get(ulp);
337 rcu_read_unlock();
338 ops->ulp_sriov_config(ulp->handle, num_vfs);
339 bnxt_ulp_put(ulp);
340 }
341}
342
343void bnxt_ulp_shutdown(struct bnxt *bp)
344{
345 struct bnxt_en_dev *edev = bp->edev;
346 struct bnxt_ulp_ops *ops;
347 int i;
348
349 if (!edev)
350 return;
351
352 for (i = 0; i < BNXT_MAX_ULP; i++) {
353 struct bnxt_ulp *ulp = &edev->ulp_tbl[i];
354
355 ops = rtnl_dereference(ulp->ulp_ops);
356 if (!ops || !ops->ulp_shutdown)
357 continue;
358 ops->ulp_shutdown(ulp->handle);
359 }
360}
361
362void bnxt_ulp_irq_stop(struct bnxt *bp)
363{
364 struct bnxt_en_dev *edev = bp->edev;
365 struct bnxt_ulp_ops *ops;
366
367 if (!edev || !(edev->flags & BNXT_EN_FLAG_MSIX_REQUESTED))
368 return;
369
370 if (bnxt_ulp_registered(bp->edev, BNXT_ROCE_ULP)) {
371 struct bnxt_ulp *ulp = &edev->ulp_tbl[BNXT_ROCE_ULP];
372
373 if (!ulp->msix_requested)
374 return;
375
376 ops = rtnl_dereference(ulp->ulp_ops);
377 if (!ops || !ops->ulp_irq_stop)
378 return;
379 ops->ulp_irq_stop(ulp->handle);
380 }
381}
382
383void bnxt_ulp_irq_restart(struct bnxt *bp, int err)
384{
385 struct bnxt_en_dev *edev = bp->edev;
386 struct bnxt_ulp_ops *ops;
387
388 if (!edev || !(edev->flags & BNXT_EN_FLAG_MSIX_REQUESTED))
389 return;
390
391 if (bnxt_ulp_registered(bp->edev, BNXT_ROCE_ULP)) {
392 struct bnxt_ulp *ulp = &edev->ulp_tbl[BNXT_ROCE_ULP];
393 struct bnxt_msix_entry *ent = NULL;
394
395 if (!ulp->msix_requested)
396 return;
397
398 ops = rtnl_dereference(ulp->ulp_ops);
399 if (!ops || !ops->ulp_irq_restart)
400 return;
401
402 if (!err) {
403 ent = kcalloc(ulp->msix_requested, sizeof(*ent),
404 GFP_KERNEL);
405 if (!ent)
406 return;
407 bnxt_fill_msix_vecs(bp, ent);
408 }
409 ops->ulp_irq_restart(ulp->handle, ent);
410 kfree(ent);
411 }
412}
413
414void bnxt_ulp_async_events(struct bnxt *bp, struct hwrm_async_event_cmpl *cmpl)
415{
416 u16 event_id = le16_to_cpu(cmpl->event_id);
417 struct bnxt_en_dev *edev = bp->edev;
418 struct bnxt_ulp_ops *ops;
419 int i;
420
421 if (!edev)
422 return;
423
424 rcu_read_lock();
425 for (i = 0; i < BNXT_MAX_ULP; i++) {
426 struct bnxt_ulp *ulp = &edev->ulp_tbl[i];
427
428 ops = rcu_dereference(ulp->ulp_ops);
429 if (!ops || !ops->ulp_async_notifier)
430 continue;
431 if (!ulp->async_events_bmap ||
432 event_id > ulp->max_async_event_id)
433 continue;
434
435
436 smp_rmb();
437 if (test_bit(event_id, ulp->async_events_bmap))
438 ops->ulp_async_notifier(ulp->handle, cmpl);
439 }
440 rcu_read_unlock();
441}
442
443static int bnxt_register_async_events(struct bnxt_en_dev *edev, int ulp_id,
444 unsigned long *events_bmap, u16 max_id)
445{
446 struct net_device *dev = edev->net;
447 struct bnxt *bp = netdev_priv(dev);
448 struct bnxt_ulp *ulp;
449
450 if (ulp_id >= BNXT_MAX_ULP)
451 return -EINVAL;
452
453 ulp = &edev->ulp_tbl[ulp_id];
454 ulp->async_events_bmap = events_bmap;
455
456 smp_wmb();
457 ulp->max_async_event_id = max_id;
458 bnxt_hwrm_func_drv_rgtr(bp, events_bmap, max_id + 1, true);
459 return 0;
460}
461
462static const struct bnxt_en_ops bnxt_en_ops_tbl = {
463 .bnxt_register_device = bnxt_register_dev,
464 .bnxt_unregister_device = bnxt_unregister_dev,
465 .bnxt_request_msix = bnxt_req_msix_vecs,
466 .bnxt_free_msix = bnxt_free_msix_vecs,
467 .bnxt_send_fw_msg = bnxt_send_msg,
468 .bnxt_register_fw_async_events = bnxt_register_async_events,
469};
470
471struct bnxt_en_dev *bnxt_ulp_probe(struct net_device *dev)
472{
473 struct bnxt *bp = netdev_priv(dev);
474 struct bnxt_en_dev *edev;
475
476 edev = bp->edev;
477 if (!edev) {
478 edev = kzalloc(sizeof(*edev), GFP_KERNEL);
479 if (!edev)
480 return ERR_PTR(-ENOMEM);
481 edev->en_ops = &bnxt_en_ops_tbl;
482 edev->net = dev;
483 edev->pdev = bp->pdev;
484 edev->l2_db_size = bp->db_size;
485 edev->l2_db_size_nc = bp->db_size;
486 bp->edev = edev;
487 }
488 edev->flags &= ~BNXT_EN_FLAG_ROCE_CAP;
489 if (bp->flags & BNXT_FLAG_ROCEV1_CAP)
490 edev->flags |= BNXT_EN_FLAG_ROCEV1_CAP;
491 if (bp->flags & BNXT_FLAG_ROCEV2_CAP)
492 edev->flags |= BNXT_EN_FLAG_ROCEV2_CAP;
493 return bp->edev;
494}
495EXPORT_SYMBOL(bnxt_ulp_probe);
496
