1 /* Broadcom NetXtreme-C/E network driver.
3 * Copyright (c) 2016-2018 Broadcom Limited
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.
10 #include <linux/module.h>
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>
27 static int bnxt_register_dev(struct bnxt_en_dev *edev, int ulp_id,
28 struct bnxt_ulp_ops *ulp_ops, void *handle)
30 struct net_device *dev = edev->net;
31 struct bnxt *bp = netdev_priv(dev);
35 if (ulp_id >= BNXT_MAX_ULP)
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);
43 if (ulp_id == BNXT_ROCE_ULP) {
44 unsigned int max_stat_ctxs;
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)
50 bnxt_set_max_func_stat_ctxs(bp, max_stat_ctxs -
51 BNXT_MIN_ROCE_STAT_CTXS);
54 atomic_set(&ulp->ref_count, 0);
56 rcu_assign_pointer(ulp->ulp_ops, ulp_ops);
58 if (ulp_id == BNXT_ROCE_ULP) {
59 if (test_bit(BNXT_STATE_OPEN, &bp->state))
60 bnxt_hwrm_vnic_cfg(bp, 0);
66 static int bnxt_unregister_dev(struct bnxt_en_dev *edev, int ulp_id)
68 struct net_device *dev = edev->net;
69 struct bnxt *bp = netdev_priv(dev);
74 if (ulp_id >= BNXT_MAX_ULP)
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);
82 if (ulp_id == BNXT_ROCE_ULP) {
83 unsigned int max_stat_ctxs;
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);
90 if (ulp->max_async_event_id)
91 bnxt_hwrm_func_rgtr_async_events(bp, NULL, 0);
93 RCU_INIT_POINTER(ulp->ulp_ops, NULL);
95 ulp->max_async_event_id = 0;
96 ulp->async_events_bmap = NULL;
97 while (atomic_read(&ulp->ref_count) != 0 && i < 10) {
104 static void bnxt_fill_msix_vecs(struct bnxt *bp, struct bnxt_msix_entry *ent)
106 struct bnxt_en_dev *edev = bp->edev;
107 int num_msix, idx, i;
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;
118 static int bnxt_req_msix_vecs(struct bnxt_en_dev *edev, int ulp_id,
119 struct bnxt_msix_entry *ent, int num_msix)
121 struct net_device *dev = edev->net;
122 struct bnxt *bp = netdev_priv(dev);
123 int max_idx, max_cp_rings;
128 if (ulp_id != BNXT_ROCE_ULP)
131 if (!(bp->flags & BNXT_FLAG_USING_MSIX))
134 if (edev->ulp_tbl[ulp_id].msix_requested)
137 max_cp_rings = bnxt_get_max_func_cp_rings(bp);
138 avail_msix = bnxt_get_avail_msix(bp, num_msix);
141 if (avail_msix > num_msix)
142 avail_msix = num_msix;
144 if (BNXT_NEW_RM(bp)) {
145 idx = bp->cp_nr_rings;
147 max_idx = min_t(int, bp->total_irqs, max_cp_rings);
148 idx = max_idx - avail_msix;
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);
157 rc = bnxt_reserve_rings(bp);
161 edev->ulp_tbl[ulp_id].msix_requested = 0;
165 if (BNXT_NEW_RM(bp)) {
166 struct bnxt_hw_resc *hw_resc = &bp->hw_resc;
168 avail_msix = hw_resc->resv_cp_rings - bp->cp_nr_rings;
169 edev->ulp_tbl[ulp_id].msix_requested = avail_msix;
171 bnxt_fill_msix_vecs(bp, ent);
172 bnxt_set_max_func_cp_rings(bp, max_cp_rings - avail_msix);
173 edev->flags |= BNXT_EN_FLAG_MSIX_REQUESTED;
177 static int bnxt_free_msix_vecs(struct bnxt_en_dev *edev, int ulp_id)
179 struct net_device *dev = edev->net;
180 struct bnxt *bp = netdev_priv(dev);
181 int max_cp_rings, msix_requested;
184 if (ulp_id != BNXT_ROCE_ULP)
187 if (!(edev->flags & BNXT_EN_FLAG_MSIX_REQUESTED))
190 max_cp_rings = bnxt_get_max_func_cp_rings(bp);
191 msix_requested = edev->ulp_tbl[ulp_id].msix_requested;
192 bnxt_set_max_func_cp_rings(bp, max_cp_rings + msix_requested);
193 edev->ulp_tbl[ulp_id].msix_requested = 0;
194 edev->flags &= ~BNXT_EN_FLAG_MSIX_REQUESTED;
195 if (netif_running(dev)) {
196 bnxt_close_nic(bp, true, false);
197 bnxt_open_nic(bp, true, false);
202 int bnxt_get_ulp_msix_num(struct bnxt *bp)
204 if (bnxt_ulp_registered(bp->edev, BNXT_ROCE_ULP)) {
205 struct bnxt_en_dev *edev = bp->edev;
207 return edev->ulp_tbl[BNXT_ROCE_ULP].msix_requested;
212 int bnxt_get_ulp_msix_base(struct bnxt *bp)
214 if (bnxt_ulp_registered(bp->edev, BNXT_ROCE_ULP)) {
215 struct bnxt_en_dev *edev = bp->edev;
217 if (edev->ulp_tbl[BNXT_ROCE_ULP].msix_requested)
218 return edev->ulp_tbl[BNXT_ROCE_ULP].msix_base;
223 void bnxt_subtract_ulp_resources(struct bnxt *bp, int ulp_id)
226 if (bnxt_ulp_registered(bp->edev, ulp_id)) {
227 struct bnxt_en_dev *edev = bp->edev;
228 unsigned int msix_req, max;
230 msix_req = edev->ulp_tbl[ulp_id].msix_requested;
231 max = bnxt_get_max_func_cp_rings(bp);
232 bnxt_set_max_func_cp_rings(bp, max - msix_req);
233 max = bnxt_get_max_func_stat_ctxs(bp);
234 bnxt_set_max_func_stat_ctxs(bp, max - 1);
238 static int bnxt_send_msg(struct bnxt_en_dev *edev, int ulp_id,
239 struct bnxt_fw_msg *fw_msg)
241 struct net_device *dev = edev->net;
242 struct bnxt *bp = netdev_priv(dev);
246 mutex_lock(&bp->hwrm_cmd_lock);
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,
252 struct output *resp = bp->hwrm_cmd_resp_addr;
253 u32 len = le16_to_cpu(resp->resp_len);
255 if (fw_msg->resp_max_len < len)
256 len = fw_msg->resp_max_len;
258 memcpy(fw_msg->resp, resp, len);
260 mutex_unlock(&bp->hwrm_cmd_lock);
264 static void bnxt_ulp_get(struct bnxt_ulp *ulp)
266 atomic_inc(&ulp->ref_count);
269 static void bnxt_ulp_put(struct bnxt_ulp *ulp)
271 atomic_dec(&ulp->ref_count);
274 void bnxt_ulp_stop(struct bnxt *bp)
276 struct bnxt_en_dev *edev = bp->edev;
277 struct bnxt_ulp_ops *ops;
283 for (i = 0; i < BNXT_MAX_ULP; i++) {
284 struct bnxt_ulp *ulp = &edev->ulp_tbl[i];
286 ops = rtnl_dereference(ulp->ulp_ops);
287 if (!ops || !ops->ulp_stop)
289 ops->ulp_stop(ulp->handle);
293 void bnxt_ulp_start(struct bnxt *bp)
295 struct bnxt_en_dev *edev = bp->edev;
296 struct bnxt_ulp_ops *ops;
302 for (i = 0; i < BNXT_MAX_ULP; i++) {
303 struct bnxt_ulp *ulp = &edev->ulp_tbl[i];
305 ops = rtnl_dereference(ulp->ulp_ops);
306 if (!ops || !ops->ulp_start)
308 ops->ulp_start(ulp->handle);
312 void bnxt_ulp_sriov_cfg(struct bnxt *bp, int num_vfs)
314 struct bnxt_en_dev *edev = bp->edev;
315 struct bnxt_ulp_ops *ops;
321 for (i = 0; i < BNXT_MAX_ULP; i++) {
322 struct bnxt_ulp *ulp = &edev->ulp_tbl[i];
325 ops = rcu_dereference(ulp->ulp_ops);
326 if (!ops || !ops->ulp_sriov_config) {
332 ops->ulp_sriov_config(ulp->handle, num_vfs);
337 void bnxt_ulp_shutdown(struct bnxt *bp)
339 struct bnxt_en_dev *edev = bp->edev;
340 struct bnxt_ulp_ops *ops;
346 for (i = 0; i < BNXT_MAX_ULP; i++) {
347 struct bnxt_ulp *ulp = &edev->ulp_tbl[i];
349 ops = rtnl_dereference(ulp->ulp_ops);
350 if (!ops || !ops->ulp_shutdown)
352 ops->ulp_shutdown(ulp->handle);
356 void bnxt_ulp_irq_stop(struct bnxt *bp)
358 struct bnxt_en_dev *edev = bp->edev;
359 struct bnxt_ulp_ops *ops;
361 if (!edev || !(edev->flags & BNXT_EN_FLAG_MSIX_REQUESTED))
364 if (bnxt_ulp_registered(bp->edev, BNXT_ROCE_ULP)) {
365 struct bnxt_ulp *ulp = &edev->ulp_tbl[BNXT_ROCE_ULP];
367 if (!ulp->msix_requested)
370 ops = rtnl_dereference(ulp->ulp_ops);
371 if (!ops || !ops->ulp_irq_stop)
373 ops->ulp_irq_stop(ulp->handle);
377 void bnxt_ulp_irq_restart(struct bnxt *bp, int err)
379 struct bnxt_en_dev *edev = bp->edev;
380 struct bnxt_ulp_ops *ops;
382 if (!edev || !(edev->flags & BNXT_EN_FLAG_MSIX_REQUESTED))
385 if (bnxt_ulp_registered(bp->edev, BNXT_ROCE_ULP)) {
386 struct bnxt_ulp *ulp = &edev->ulp_tbl[BNXT_ROCE_ULP];
387 struct bnxt_msix_entry *ent = NULL;
389 if (!ulp->msix_requested)
392 ops = rtnl_dereference(ulp->ulp_ops);
393 if (!ops || !ops->ulp_irq_restart)
397 ent = kcalloc(ulp->msix_requested, sizeof(*ent),
401 bnxt_fill_msix_vecs(bp, ent);
403 ops->ulp_irq_restart(ulp->handle, ent);
408 void bnxt_ulp_async_events(struct bnxt *bp, struct hwrm_async_event_cmpl *cmpl)
410 u16 event_id = le16_to_cpu(cmpl->event_id);
411 struct bnxt_en_dev *edev = bp->edev;
412 struct bnxt_ulp_ops *ops;
419 for (i = 0; i < BNXT_MAX_ULP; i++) {
420 struct bnxt_ulp *ulp = &edev->ulp_tbl[i];
422 ops = rcu_dereference(ulp->ulp_ops);
423 if (!ops || !ops->ulp_async_notifier)
425 if (!ulp->async_events_bmap ||
426 event_id > ulp->max_async_event_id)
429 /* Read max_async_event_id first before testing the bitmap. */
431 if (test_bit(event_id, ulp->async_events_bmap))
432 ops->ulp_async_notifier(ulp->handle, cmpl);
437 static int bnxt_register_async_events(struct bnxt_en_dev *edev, int ulp_id,
438 unsigned long *events_bmap, u16 max_id)
440 struct net_device *dev = edev->net;
441 struct bnxt *bp = netdev_priv(dev);
442 struct bnxt_ulp *ulp;
444 if (ulp_id >= BNXT_MAX_ULP)
447 ulp = &edev->ulp_tbl[ulp_id];
448 ulp->async_events_bmap = events_bmap;
449 /* Make sure bnxt_ulp_async_events() sees this order */
451 ulp->max_async_event_id = max_id;
452 bnxt_hwrm_func_rgtr_async_events(bp, events_bmap, max_id + 1);
456 static const struct bnxt_en_ops bnxt_en_ops_tbl = {
457 .bnxt_register_device = bnxt_register_dev,
458 .bnxt_unregister_device = bnxt_unregister_dev,
459 .bnxt_request_msix = bnxt_req_msix_vecs,
460 .bnxt_free_msix = bnxt_free_msix_vecs,
461 .bnxt_send_fw_msg = bnxt_send_msg,
462 .bnxt_register_fw_async_events = bnxt_register_async_events,
465 struct bnxt_en_dev *bnxt_ulp_probe(struct net_device *dev)
467 struct bnxt *bp = netdev_priv(dev);
468 struct bnxt_en_dev *edev;
472 edev = kzalloc(sizeof(*edev), GFP_KERNEL);
474 return ERR_PTR(-ENOMEM);
475 edev->en_ops = &bnxt_en_ops_tbl;
476 if (bp->flags & BNXT_FLAG_ROCEV1_CAP)
477 edev->flags |= BNXT_EN_FLAG_ROCEV1_CAP;
478 if (bp->flags & BNXT_FLAG_ROCEV2_CAP)
479 edev->flags |= BNXT_EN_FLAG_ROCEV2_CAP;
481 edev->pdev = bp->pdev;