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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_rgtr_async_events(bp, NULL, 0);
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 ent[i].db_offset = (idx + i) * 0x80;
108 }
109}
110
111static int bnxt_req_msix_vecs(struct bnxt_en_dev *edev, int ulp_id,
112 struct bnxt_msix_entry *ent, int num_msix)
113{
114 struct net_device *dev = edev->net;
115 struct bnxt *bp = netdev_priv(dev);
116 int max_idx, max_cp_rings;
117 int avail_msix, idx;
118 int rc = 0;
119
120 ASSERT_RTNL();
121 if (ulp_id != BNXT_ROCE_ULP)
122 return -EINVAL;
123
124 if (!(bp->flags & BNXT_FLAG_USING_MSIX))
125 return -ENODEV;
126
127 if (edev->ulp_tbl[ulp_id].msix_requested)
128 return -EAGAIN;
129
130 max_cp_rings = bnxt_get_max_func_cp_rings(bp);
131 avail_msix = bnxt_get_avail_msix(bp, num_msix);
132 if (!avail_msix)
133 return -ENOMEM;
134 if (avail_msix > num_msix)
135 avail_msix = num_msix;
136
137 if (BNXT_NEW_RM(bp)) {
138 idx = bp->cp_nr_rings;
139 } else {
140 max_idx = min_t(int, bp->total_irqs, max_cp_rings);
141 idx = max_idx - avail_msix;
142 }
143 edev->ulp_tbl[ulp_id].msix_base = idx;
144 edev->ulp_tbl[ulp_id].msix_requested = avail_msix;
145 if (bp->total_irqs < (idx + avail_msix)) {
146 if (netif_running(dev)) {
147 bnxt_close_nic(bp, true, false);
148 rc = bnxt_open_nic(bp, true, false);
149 } else {
150 rc = bnxt_reserve_rings(bp, true);
151 }
152 }
153 if (rc) {
154 edev->ulp_tbl[ulp_id].msix_requested = 0;
155 return -EAGAIN;
156 }
157
158 if (BNXT_NEW_RM(bp)) {
159 struct bnxt_hw_resc *hw_resc = &bp->hw_resc;
160 int resv_msix;
161
162 resv_msix = hw_resc->resv_irqs - bp->cp_nr_rings;
163 avail_msix = min_t(int, resv_msix, avail_msix);
164 edev->ulp_tbl[ulp_id].msix_requested = avail_msix;
165 }
166 bnxt_fill_msix_vecs(bp, ent);
167 edev->flags |= BNXT_EN_FLAG_MSIX_REQUESTED;
168 return avail_msix;
169}
170
171static int bnxt_free_msix_vecs(struct bnxt_en_dev *edev, int ulp_id)
172{
173 struct net_device *dev = edev->net;
174 struct bnxt *bp = netdev_priv(dev);
175
176 ASSERT_RTNL();
177 if (ulp_id != BNXT_ROCE_ULP)
178 return -EINVAL;
179
180 if (!(edev->flags & BNXT_EN_FLAG_MSIX_REQUESTED))
181 return 0;
182
183 edev->ulp_tbl[ulp_id].msix_requested = 0;
184 edev->flags &= ~BNXT_EN_FLAG_MSIX_REQUESTED;
185 if (netif_running(dev)) {
186 bnxt_close_nic(bp, true, false);
187 bnxt_open_nic(bp, true, false);
188 }
189 return 0;
190}
191
192int bnxt_get_ulp_msix_num(struct bnxt *bp)
193{
194 if (bnxt_ulp_registered(bp->edev, BNXT_ROCE_ULP)) {
195 struct bnxt_en_dev *edev = bp->edev;
196
197 return edev->ulp_tbl[BNXT_ROCE_ULP].msix_requested;
198 }
199 return 0;
200}
201
202int bnxt_get_ulp_msix_base(struct bnxt *bp)
203{
204 if (bnxt_ulp_registered(bp->edev, BNXT_ROCE_ULP)) {
205 struct bnxt_en_dev *edev = bp->edev;
206
207 if (edev->ulp_tbl[BNXT_ROCE_ULP].msix_requested)
208 return edev->ulp_tbl[BNXT_ROCE_ULP].msix_base;
209 }
210 return 0;
211}
212
213int bnxt_get_ulp_stat_ctxs(struct bnxt *bp)
214{
215 if (bnxt_ulp_registered(bp->edev, BNXT_ROCE_ULP))
216 return BNXT_MIN_ROCE_STAT_CTXS;
217
218 return 0;
219}
220
221static int bnxt_send_msg(struct bnxt_en_dev *edev, int ulp_id,
222 struct bnxt_fw_msg *fw_msg)
223{
224 struct net_device *dev = edev->net;
225 struct bnxt *bp = netdev_priv(dev);
226 struct input *req;
227 int rc;
228
229 mutex_lock(&bp->hwrm_cmd_lock);
230 req = fw_msg->msg;
231 req->resp_addr = cpu_to_le64(bp->hwrm_cmd_resp_dma_addr);
232 rc = _hwrm_send_message(bp, fw_msg->msg, fw_msg->msg_len,
233 fw_msg->timeout);
234 if (!rc) {
235 struct output *resp = bp->hwrm_cmd_resp_addr;
236 u32 len = le16_to_cpu(resp->resp_len);
237
238 if (fw_msg->resp_max_len < len)
239 len = fw_msg->resp_max_len;
240
241 memcpy(fw_msg->resp, resp, len);
242 }
243 mutex_unlock(&bp->hwrm_cmd_lock);
244 return rc;
245}
246
247static void bnxt_ulp_get(struct bnxt_ulp *ulp)
248{
249 atomic_inc(&ulp->ref_count);
250}
251
252static void bnxt_ulp_put(struct bnxt_ulp *ulp)
253{
254 atomic_dec(&ulp->ref_count);
255}
256
257void bnxt_ulp_stop(struct bnxt *bp)
258{
259 struct bnxt_en_dev *edev = bp->edev;
260 struct bnxt_ulp_ops *ops;
261 int i;
262
263 if (!edev)
264 return;
265
266 for (i = 0; i < BNXT_MAX_ULP; i++) {
267 struct bnxt_ulp *ulp = &edev->ulp_tbl[i];
268
269 ops = rtnl_dereference(ulp->ulp_ops);
270 if (!ops || !ops->ulp_stop)
271 continue;
272 ops->ulp_stop(ulp->handle);
273 }
274}
275
276void bnxt_ulp_start(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_start)
290 continue;
291 ops->ulp_start(ulp->handle);
292 }
293}
294
295void bnxt_ulp_sriov_cfg(struct bnxt *bp, int num_vfs)
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 rcu_read_lock();
308 ops = rcu_dereference(ulp->ulp_ops);
309 if (!ops || !ops->ulp_sriov_config) {
310 rcu_read_unlock();
311 continue;
312 }
313 bnxt_ulp_get(ulp);
314 rcu_read_unlock();
315 ops->ulp_sriov_config(ulp->handle, num_vfs);
316 bnxt_ulp_put(ulp);
317 }
318}
319
320void bnxt_ulp_shutdown(struct bnxt *bp)
321{
322 struct bnxt_en_dev *edev = bp->edev;
323 struct bnxt_ulp_ops *ops;
324 int i;
325
326 if (!edev)
327 return;
328
329 for (i = 0; i < BNXT_MAX_ULP; i++) {
330 struct bnxt_ulp *ulp = &edev->ulp_tbl[i];
331
332 ops = rtnl_dereference(ulp->ulp_ops);
333 if (!ops || !ops->ulp_shutdown)
334 continue;
335 ops->ulp_shutdown(ulp->handle);
336 }
337}
338
339void bnxt_ulp_irq_stop(struct bnxt *bp)
340{
341 struct bnxt_en_dev *edev = bp->edev;
342 struct bnxt_ulp_ops *ops;
343
344 if (!edev || !(edev->flags & BNXT_EN_FLAG_MSIX_REQUESTED))
345 return;
346
347 if (bnxt_ulp_registered(bp->edev, BNXT_ROCE_ULP)) {
348 struct bnxt_ulp *ulp = &edev->ulp_tbl[BNXT_ROCE_ULP];
349
350 if (!ulp->msix_requested)
351 return;
352
353 ops = rtnl_dereference(ulp->ulp_ops);
354 if (!ops || !ops->ulp_irq_stop)
355 return;
356 ops->ulp_irq_stop(ulp->handle);
357 }
358}
359
360void bnxt_ulp_irq_restart(struct bnxt *bp, int err)
361{
362 struct bnxt_en_dev *edev = bp->edev;
363 struct bnxt_ulp_ops *ops;
364
365 if (!edev || !(edev->flags & BNXT_EN_FLAG_MSIX_REQUESTED))
366 return;
367
368 if (bnxt_ulp_registered(bp->edev, BNXT_ROCE_ULP)) {
369 struct bnxt_ulp *ulp = &edev->ulp_tbl[BNXT_ROCE_ULP];
370 struct bnxt_msix_entry *ent = NULL;
371
372 if (!ulp->msix_requested)
373 return;
374
375 ops = rtnl_dereference(ulp->ulp_ops);
376 if (!ops || !ops->ulp_irq_restart)
377 return;
378
379 if (!err) {
380 ent = kcalloc(ulp->msix_requested, sizeof(*ent),
381 GFP_KERNEL);
382 if (!ent)
383 return;
384 bnxt_fill_msix_vecs(bp, ent);
385 }
386 ops->ulp_irq_restart(ulp->handle, ent);
387 kfree(ent);
388 }
389}
390
391void bnxt_ulp_async_events(struct bnxt *bp, struct hwrm_async_event_cmpl *cmpl)
392{
393 u16 event_id = le16_to_cpu(cmpl->event_id);
394 struct bnxt_en_dev *edev = bp->edev;
395 struct bnxt_ulp_ops *ops;
396 int i;
397
398 if (!edev)
399 return;
400
401 rcu_read_lock();
402 for (i = 0; i < BNXT_MAX_ULP; i++) {
403 struct bnxt_ulp *ulp = &edev->ulp_tbl[i];
404
405 ops = rcu_dereference(ulp->ulp_ops);
406 if (!ops || !ops->ulp_async_notifier)
407 continue;
408 if (!ulp->async_events_bmap ||
409 event_id > ulp->max_async_event_id)
410 continue;
411
412
413 smp_rmb();
414 if (test_bit(event_id, ulp->async_events_bmap))
415 ops->ulp_async_notifier(ulp->handle, cmpl);
416 }
417 rcu_read_unlock();
418}
419
420static int bnxt_register_async_events(struct bnxt_en_dev *edev, int ulp_id,
421 unsigned long *events_bmap, u16 max_id)
422{
423 struct net_device *dev = edev->net;
424 struct bnxt *bp = netdev_priv(dev);
425 struct bnxt_ulp *ulp;
426
427 if (ulp_id >= BNXT_MAX_ULP)
428 return -EINVAL;
429
430 ulp = &edev->ulp_tbl[ulp_id];
431 ulp->async_events_bmap = events_bmap;
432
433 smp_wmb();
434 ulp->max_async_event_id = max_id;
435 bnxt_hwrm_func_rgtr_async_events(bp, events_bmap, max_id + 1);
436 return 0;
437}
438
439static const struct bnxt_en_ops bnxt_en_ops_tbl = {
440 .bnxt_register_device = bnxt_register_dev,
441 .bnxt_unregister_device = bnxt_unregister_dev,
442 .bnxt_request_msix = bnxt_req_msix_vecs,
443 .bnxt_free_msix = bnxt_free_msix_vecs,
444 .bnxt_send_fw_msg = bnxt_send_msg,
445 .bnxt_register_fw_async_events = bnxt_register_async_events,
446};
447
448struct bnxt_en_dev *bnxt_ulp_probe(struct net_device *dev)
449{
450 struct bnxt *bp = netdev_priv(dev);
451 struct bnxt_en_dev *edev;
452
453 edev = bp->edev;
454 if (!edev) {
455 edev = kzalloc(sizeof(*edev), GFP_KERNEL);
456 if (!edev)
457 return ERR_PTR(-ENOMEM);
458 edev->en_ops = &bnxt_en_ops_tbl;
459 if (bp->flags & BNXT_FLAG_ROCEV1_CAP)
460 edev->flags |= BNXT_EN_FLAG_ROCEV1_CAP;
461 if (bp->flags & BNXT_FLAG_ROCEV2_CAP)
462 edev->flags |= BNXT_EN_FLAG_ROCEV2_CAP;
463 edev->net = dev;
464 edev->pdev = bp->pdev;
465 bp->edev = edev;
466 }
467 return bp->edev;
468}
469
