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a588e458 MC |
1 | /* Broadcom NetXtreme-C/E network driver. |
2 | * | |
ec86f14e | 3 | * Copyright (c) 2016-2018 Broadcom Limited |
a588e458 MC |
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 | ||
23 | #include "bnxt_hsi.h" | |
24 | #include "bnxt.h" | |
25 | #include "bnxt_ulp.h" | |
26 | ||
27 | static 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 | ||
66 | static 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); | |
146ed3c5 MC |
87 | if (ulp->msix_requested) |
88 | edev->en_ops->bnxt_free_msix(edev, ulp_id); | |
a588e458 MC |
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 | ||
ec86f14e MC |
104 | static 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 | ||
a588e458 MC |
118 | static 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; | |
ec86f14e | 124 | int avail_msix, idx; |
fbcfc8e4 | 125 | int rc = 0; |
a588e458 MC |
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 | ||
08654eb2 MC |
134 | if (edev->ulp_tbl[ulp_id].msix_requested) |
135 | return -EAGAIN; | |
136 | ||
a588e458 | 137 | max_cp_rings = bnxt_get_max_func_cp_rings(bp); |
fbcfc8e4 | 138 | avail_msix = bnxt_get_avail_msix(bp, num_msix); |
a588e458 MC |
139 | if (!avail_msix) |
140 | return -ENOMEM; | |
141 | if (avail_msix > num_msix) | |
142 | avail_msix = num_msix; | |
143 | ||
f1ca94de | 144 | if (BNXT_NEW_RM(bp)) { |
08654eb2 | 145 | idx = bp->cp_nr_rings; |
fbcfc8e4 MC |
146 | } else { |
147 | max_idx = min_t(int, bp->total_irqs, max_cp_rings); | |
08654eb2 | 148 | idx = max_idx - avail_msix; |
fbcfc8e4 | 149 | } |
08654eb2 | 150 | edev->ulp_tbl[ulp_id].msix_base = idx; |
fbcfc8e4 MC |
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 | ||
f1ca94de | 165 | if (BNXT_NEW_RM(bp)) { |
fbcfc8e4 MC |
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 | } | |
ec86f14e | 171 | bnxt_fill_msix_vecs(bp, ent); |
ec86f14e | 172 | edev->flags |= BNXT_EN_FLAG_MSIX_REQUESTED; |
a588e458 MC |
173 | return avail_msix; |
174 | } | |
175 | ||
176 | static int bnxt_free_msix_vecs(struct bnxt_en_dev *edev, int ulp_id) | |
177 | { | |
178 | struct net_device *dev = edev->net; | |
179 | struct bnxt *bp = netdev_priv(dev); | |
a588e458 MC |
180 | |
181 | ASSERT_RTNL(); | |
182 | if (ulp_id != BNXT_ROCE_ULP) | |
183 | return -EINVAL; | |
184 | ||
ec86f14e MC |
185 | if (!(edev->flags & BNXT_EN_FLAG_MSIX_REQUESTED)) |
186 | return 0; | |
187 | ||
a588e458 | 188 | edev->ulp_tbl[ulp_id].msix_requested = 0; |
ec86f14e | 189 | edev->flags &= ~BNXT_EN_FLAG_MSIX_REQUESTED; |
fbcfc8e4 MC |
190 | if (netif_running(dev)) { |
191 | bnxt_close_nic(bp, true, false); | |
192 | bnxt_open_nic(bp, true, false); | |
193 | } | |
a588e458 MC |
194 | return 0; |
195 | } | |
196 | ||
08654eb2 MC |
197 | int bnxt_get_ulp_msix_num(struct bnxt *bp) |
198 | { | |
199 | if (bnxt_ulp_registered(bp->edev, BNXT_ROCE_ULP)) { | |
200 | struct bnxt_en_dev *edev = bp->edev; | |
201 | ||
202 | return edev->ulp_tbl[BNXT_ROCE_ULP].msix_requested; | |
203 | } | |
204 | return 0; | |
205 | } | |
206 | ||
207 | int bnxt_get_ulp_msix_base(struct bnxt *bp) | |
208 | { | |
209 | if (bnxt_ulp_registered(bp->edev, BNXT_ROCE_ULP)) { | |
210 | struct bnxt_en_dev *edev = bp->edev; | |
211 | ||
212 | if (edev->ulp_tbl[BNXT_ROCE_ULP].msix_requested) | |
213 | return edev->ulp_tbl[BNXT_ROCE_ULP].msix_base; | |
214 | } | |
215 | return 0; | |
216 | } | |
217 | ||
a588e458 MC |
218 | static int bnxt_send_msg(struct bnxt_en_dev *edev, int ulp_id, |
219 | struct bnxt_fw_msg *fw_msg) | |
220 | { | |
221 | struct net_device *dev = edev->net; | |
222 | struct bnxt *bp = netdev_priv(dev); | |
223 | struct input *req; | |
224 | int rc; | |
225 | ||
226 | mutex_lock(&bp->hwrm_cmd_lock); | |
227 | req = fw_msg->msg; | |
228 | req->resp_addr = cpu_to_le64(bp->hwrm_cmd_resp_dma_addr); | |
229 | rc = _hwrm_send_message(bp, fw_msg->msg, fw_msg->msg_len, | |
230 | fw_msg->timeout); | |
231 | if (!rc) { | |
232 | struct output *resp = bp->hwrm_cmd_resp_addr; | |
233 | u32 len = le16_to_cpu(resp->resp_len); | |
234 | ||
235 | if (fw_msg->resp_max_len < len) | |
236 | len = fw_msg->resp_max_len; | |
237 | ||
238 | memcpy(fw_msg->resp, resp, len); | |
239 | } | |
240 | mutex_unlock(&bp->hwrm_cmd_lock); | |
241 | return rc; | |
242 | } | |
243 | ||
244 | static void bnxt_ulp_get(struct bnxt_ulp *ulp) | |
245 | { | |
246 | atomic_inc(&ulp->ref_count); | |
247 | } | |
248 | ||
249 | static void bnxt_ulp_put(struct bnxt_ulp *ulp) | |
250 | { | |
251 | atomic_dec(&ulp->ref_count); | |
252 | } | |
253 | ||
254 | void bnxt_ulp_stop(struct bnxt *bp) | |
255 | { | |
256 | struct bnxt_en_dev *edev = bp->edev; | |
257 | struct bnxt_ulp_ops *ops; | |
258 | int i; | |
259 | ||
260 | if (!edev) | |
261 | return; | |
262 | ||
263 | for (i = 0; i < BNXT_MAX_ULP; i++) { | |
264 | struct bnxt_ulp *ulp = &edev->ulp_tbl[i]; | |
265 | ||
266 | ops = rtnl_dereference(ulp->ulp_ops); | |
267 | if (!ops || !ops->ulp_stop) | |
268 | continue; | |
269 | ops->ulp_stop(ulp->handle); | |
270 | } | |
271 | } | |
272 | ||
273 | void bnxt_ulp_start(struct bnxt *bp) | |
274 | { | |
275 | struct bnxt_en_dev *edev = bp->edev; | |
276 | struct bnxt_ulp_ops *ops; | |
277 | int i; | |
278 | ||
279 | if (!edev) | |
280 | return; | |
281 | ||
282 | for (i = 0; i < BNXT_MAX_ULP; i++) { | |
283 | struct bnxt_ulp *ulp = &edev->ulp_tbl[i]; | |
284 | ||
285 | ops = rtnl_dereference(ulp->ulp_ops); | |
286 | if (!ops || !ops->ulp_start) | |
287 | continue; | |
288 | ops->ulp_start(ulp->handle); | |
289 | } | |
290 | } | |
291 | ||
292 | void bnxt_ulp_sriov_cfg(struct bnxt *bp, int num_vfs) | |
293 | { | |
294 | struct bnxt_en_dev *edev = bp->edev; | |
295 | struct bnxt_ulp_ops *ops; | |
296 | int i; | |
297 | ||
298 | if (!edev) | |
299 | return; | |
300 | ||
301 | for (i = 0; i < BNXT_MAX_ULP; i++) { | |
302 | struct bnxt_ulp *ulp = &edev->ulp_tbl[i]; | |
303 | ||
304 | rcu_read_lock(); | |
305 | ops = rcu_dereference(ulp->ulp_ops); | |
306 | if (!ops || !ops->ulp_sriov_config) { | |
307 | rcu_read_unlock(); | |
308 | continue; | |
309 | } | |
310 | bnxt_ulp_get(ulp); | |
311 | rcu_read_unlock(); | |
312 | ops->ulp_sriov_config(ulp->handle, num_vfs); | |
313 | bnxt_ulp_put(ulp); | |
314 | } | |
315 | } | |
316 | ||
0efd2fc6 MC |
317 | void bnxt_ulp_shutdown(struct bnxt *bp) |
318 | { | |
319 | struct bnxt_en_dev *edev = bp->edev; | |
320 | struct bnxt_ulp_ops *ops; | |
321 | int i; | |
322 | ||
323 | if (!edev) | |
324 | return; | |
325 | ||
326 | for (i = 0; i < BNXT_MAX_ULP; i++) { | |
327 | struct bnxt_ulp *ulp = &edev->ulp_tbl[i]; | |
328 | ||
329 | ops = rtnl_dereference(ulp->ulp_ops); | |
330 | if (!ops || !ops->ulp_shutdown) | |
331 | continue; | |
332 | ops->ulp_shutdown(ulp->handle); | |
333 | } | |
334 | } | |
335 | ||
ec86f14e MC |
336 | void bnxt_ulp_irq_stop(struct bnxt *bp) |
337 | { | |
338 | struct bnxt_en_dev *edev = bp->edev; | |
339 | struct bnxt_ulp_ops *ops; | |
340 | ||
341 | if (!edev || !(edev->flags & BNXT_EN_FLAG_MSIX_REQUESTED)) | |
342 | return; | |
343 | ||
344 | if (bnxt_ulp_registered(bp->edev, BNXT_ROCE_ULP)) { | |
345 | struct bnxt_ulp *ulp = &edev->ulp_tbl[BNXT_ROCE_ULP]; | |
346 | ||
347 | if (!ulp->msix_requested) | |
348 | return; | |
349 | ||
350 | ops = rtnl_dereference(ulp->ulp_ops); | |
351 | if (!ops || !ops->ulp_irq_stop) | |
352 | return; | |
353 | ops->ulp_irq_stop(ulp->handle); | |
354 | } | |
355 | } | |
356 | ||
357 | void bnxt_ulp_irq_restart(struct bnxt *bp, int err) | |
358 | { | |
359 | struct bnxt_en_dev *edev = bp->edev; | |
360 | struct bnxt_ulp_ops *ops; | |
361 | ||
362 | if (!edev || !(edev->flags & BNXT_EN_FLAG_MSIX_REQUESTED)) | |
363 | return; | |
364 | ||
365 | if (bnxt_ulp_registered(bp->edev, BNXT_ROCE_ULP)) { | |
366 | struct bnxt_ulp *ulp = &edev->ulp_tbl[BNXT_ROCE_ULP]; | |
367 | struct bnxt_msix_entry *ent = NULL; | |
368 | ||
369 | if (!ulp->msix_requested) | |
370 | return; | |
371 | ||
372 | ops = rtnl_dereference(ulp->ulp_ops); | |
373 | if (!ops || !ops->ulp_irq_restart) | |
374 | return; | |
375 | ||
376 | if (!err) { | |
377 | ent = kcalloc(ulp->msix_requested, sizeof(*ent), | |
378 | GFP_KERNEL); | |
379 | if (!ent) | |
380 | return; | |
381 | bnxt_fill_msix_vecs(bp, ent); | |
382 | } | |
383 | ops->ulp_irq_restart(ulp->handle, ent); | |
384 | kfree(ent); | |
385 | } | |
386 | } | |
387 | ||
a588e458 MC |
388 | void bnxt_ulp_async_events(struct bnxt *bp, struct hwrm_async_event_cmpl *cmpl) |
389 | { | |
390 | u16 event_id = le16_to_cpu(cmpl->event_id); | |
391 | struct bnxt_en_dev *edev = bp->edev; | |
392 | struct bnxt_ulp_ops *ops; | |
393 | int i; | |
394 | ||
395 | if (!edev) | |
396 | return; | |
397 | ||
398 | rcu_read_lock(); | |
399 | for (i = 0; i < BNXT_MAX_ULP; i++) { | |
400 | struct bnxt_ulp *ulp = &edev->ulp_tbl[i]; | |
401 | ||
402 | ops = rcu_dereference(ulp->ulp_ops); | |
403 | if (!ops || !ops->ulp_async_notifier) | |
404 | continue; | |
405 | if (!ulp->async_events_bmap || | |
406 | event_id > ulp->max_async_event_id) | |
407 | continue; | |
408 | ||
409 | /* Read max_async_event_id first before testing the bitmap. */ | |
410 | smp_rmb(); | |
411 | if (test_bit(event_id, ulp->async_events_bmap)) | |
412 | ops->ulp_async_notifier(ulp->handle, cmpl); | |
413 | } | |
414 | rcu_read_unlock(); | |
415 | } | |
416 | ||
417 | static int bnxt_register_async_events(struct bnxt_en_dev *edev, int ulp_id, | |
418 | unsigned long *events_bmap, u16 max_id) | |
419 | { | |
420 | struct net_device *dev = edev->net; | |
421 | struct bnxt *bp = netdev_priv(dev); | |
422 | struct bnxt_ulp *ulp; | |
423 | ||
424 | if (ulp_id >= BNXT_MAX_ULP) | |
425 | return -EINVAL; | |
426 | ||
427 | ulp = &edev->ulp_tbl[ulp_id]; | |
428 | ulp->async_events_bmap = events_bmap; | |
429 | /* Make sure bnxt_ulp_async_events() sees this order */ | |
430 | smp_wmb(); | |
431 | ulp->max_async_event_id = max_id; | |
432 | bnxt_hwrm_func_rgtr_async_events(bp, events_bmap, max_id + 1); | |
433 | return 0; | |
434 | } | |
435 | ||
436 | static const struct bnxt_en_ops bnxt_en_ops_tbl = { | |
437 | .bnxt_register_device = bnxt_register_dev, | |
438 | .bnxt_unregister_device = bnxt_unregister_dev, | |
439 | .bnxt_request_msix = bnxt_req_msix_vecs, | |
440 | .bnxt_free_msix = bnxt_free_msix_vecs, | |
441 | .bnxt_send_fw_msg = bnxt_send_msg, | |
442 | .bnxt_register_fw_async_events = bnxt_register_async_events, | |
443 | }; | |
444 | ||
445 | struct bnxt_en_dev *bnxt_ulp_probe(struct net_device *dev) | |
446 | { | |
447 | struct bnxt *bp = netdev_priv(dev); | |
448 | struct bnxt_en_dev *edev; | |
449 | ||
450 | edev = bp->edev; | |
451 | if (!edev) { | |
452 | edev = kzalloc(sizeof(*edev), GFP_KERNEL); | |
453 | if (!edev) | |
454 | return ERR_PTR(-ENOMEM); | |
455 | edev->en_ops = &bnxt_en_ops_tbl; | |
456 | if (bp->flags & BNXT_FLAG_ROCEV1_CAP) | |
457 | edev->flags |= BNXT_EN_FLAG_ROCEV1_CAP; | |
458 | if (bp->flags & BNXT_FLAG_ROCEV2_CAP) | |
459 | edev->flags |= BNXT_EN_FLAG_ROCEV2_CAP; | |
460 | edev->net = dev; | |
461 | edev->pdev = bp->pdev; | |
462 | bp->edev = edev; | |
463 | } | |
464 | return bp->edev; | |
465 | } |