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->cp_nr_rings == max_stat_ctxs)
52 atomic_set(&ulp->ref_count, 0);
54 rcu_assign_pointer(ulp->ulp_ops, ulp_ops);
56 if (ulp_id == BNXT_ROCE_ULP) {
57 if (test_bit(BNXT_STATE_OPEN, &bp->state))
58 bnxt_hwrm_vnic_cfg(bp, 0);
64 static int bnxt_unregister_dev(struct bnxt_en_dev *edev, int ulp_id)
66 struct net_device *dev = edev->net;
67 struct bnxt *bp = netdev_priv(dev);
72 if (ulp_id >= BNXT_MAX_ULP)
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);
80 if (ulp_id == BNXT_ROCE_ULP && ulp->msix_requested)
81 edev->en_ops->bnxt_free_msix(edev, ulp_id);
83 if (ulp->max_async_event_id)
84 bnxt_hwrm_func_drv_rgtr(bp, NULL, 0, true);
86 RCU_INIT_POINTER(ulp->ulp_ops, NULL);
88 ulp->max_async_event_id = 0;
89 ulp->async_events_bmap = NULL;
90 while (atomic_read(&ulp->ref_count) != 0 && i < 10) {
97 static void bnxt_fill_msix_vecs(struct bnxt *bp, struct bnxt_msix_entry *ent)
99 struct bnxt_en_dev *edev = bp->edev;
100 int num_msix, idx, i;
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;
110 ent[i].db_offset = DB_VF_OFFSET_P5;
112 ent[i].db_offset = (idx + i) * 0x80;
117 static int bnxt_req_msix_vecs(struct bnxt_en_dev *edev, int ulp_id,
118 struct bnxt_msix_entry *ent, int num_msix)
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;
129 if (ulp_id != BNXT_ROCE_ULP)
132 if (!(bp->flags & BNXT_FLAG_USING_MSIX))
135 if (edev->ulp_tbl[ulp_id].msix_requested)
138 max_cp_rings = bnxt_get_max_func_cp_rings(bp);
139 avail_msix = bnxt_get_avail_msix(bp, num_msix);
142 if (avail_msix > num_msix)
143 avail_msix = num_msix;
145 if (BNXT_NEW_RM(bp)) {
146 idx = bp->cp_nr_rings;
148 max_idx = min_t(int, bp->total_irqs, max_cp_rings);
149 idx = max_idx - avail_msix;
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);
161 rc = bnxt_reserve_rings(bp, true);
165 edev->ulp_tbl[ulp_id].msix_requested = 0;
169 if (BNXT_NEW_RM(bp)) {
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;
176 bnxt_fill_msix_vecs(bp, ent);
177 edev->flags |= BNXT_EN_FLAG_MSIX_REQUESTED;
181 static int bnxt_free_msix_vecs(struct bnxt_en_dev *edev, int ulp_id)
183 struct net_device *dev = edev->net;
184 struct bnxt *bp = netdev_priv(dev);
187 if (ulp_id != BNXT_ROCE_ULP)
190 if (!(edev->flags & BNXT_EN_FLAG_MSIX_REQUESTED))
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);
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 int bnxt_get_ulp_stat_ctxs(struct bnxt *bp)
225 if (bnxt_ulp_registered(bp->edev, BNXT_ROCE_ULP)) {
226 struct bnxt_en_dev *edev = bp->edev;
228 if (edev->ulp_tbl[BNXT_ROCE_ULP].msix_requested)
229 return BNXT_MIN_ROCE_STAT_CTXS;
235 static int bnxt_send_msg(struct bnxt_en_dev *edev, int ulp_id,
236 struct bnxt_fw_msg *fw_msg)
238 struct net_device *dev = edev->net;
239 struct bnxt *bp = netdev_priv(dev);
243 if (ulp_id != BNXT_ROCE_ULP && bp->fw_reset_state)
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 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];
287 ops = rtnl_dereference(ulp->ulp_ops);
288 if (!ops || !ops->ulp_stop)
290 ops->ulp_stop(ulp->handle);
294 void bnxt_ulp_start(struct bnxt *bp, int err)
296 struct bnxt_en_dev *edev = bp->edev;
297 struct bnxt_ulp_ops *ops;
303 edev->flags &= ~BNXT_EN_FLAG_ULP_STOPPED;
308 for (i = 0; i < BNXT_MAX_ULP; i++) {
309 struct bnxt_ulp *ulp = &edev->ulp_tbl[i];
311 ops = rtnl_dereference(ulp->ulp_ops);
312 if (!ops || !ops->ulp_start)
314 ops->ulp_start(ulp->handle);
318 void bnxt_ulp_sriov_cfg(struct bnxt *bp, int num_vfs)
320 struct bnxt_en_dev *edev = bp->edev;
321 struct bnxt_ulp_ops *ops;
327 for (i = 0; i < BNXT_MAX_ULP; i++) {
328 struct bnxt_ulp *ulp = &edev->ulp_tbl[i];
331 ops = rcu_dereference(ulp->ulp_ops);
332 if (!ops || !ops->ulp_sriov_config) {
338 ops->ulp_sriov_config(ulp->handle, num_vfs);
343 void bnxt_ulp_shutdown(struct bnxt *bp)
345 struct bnxt_en_dev *edev = bp->edev;
346 struct bnxt_ulp_ops *ops;
352 for (i = 0; i < BNXT_MAX_ULP; i++) {
353 struct bnxt_ulp *ulp = &edev->ulp_tbl[i];
355 ops = rtnl_dereference(ulp->ulp_ops);
356 if (!ops || !ops->ulp_shutdown)
358 ops->ulp_shutdown(ulp->handle);
362 void bnxt_ulp_irq_stop(struct bnxt *bp)
364 struct bnxt_en_dev *edev = bp->edev;
365 struct bnxt_ulp_ops *ops;
367 if (!edev || !(edev->flags & BNXT_EN_FLAG_MSIX_REQUESTED))
370 if (bnxt_ulp_registered(bp->edev, BNXT_ROCE_ULP)) {
371 struct bnxt_ulp *ulp = &edev->ulp_tbl[BNXT_ROCE_ULP];
373 if (!ulp->msix_requested)
376 ops = rtnl_dereference(ulp->ulp_ops);
377 if (!ops || !ops->ulp_irq_stop)
379 ops->ulp_irq_stop(ulp->handle);
383 void bnxt_ulp_irq_restart(struct bnxt *bp, int err)
385 struct bnxt_en_dev *edev = bp->edev;
386 struct bnxt_ulp_ops *ops;
388 if (!edev || !(edev->flags & BNXT_EN_FLAG_MSIX_REQUESTED))
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;
395 if (!ulp->msix_requested)
398 ops = rtnl_dereference(ulp->ulp_ops);
399 if (!ops || !ops->ulp_irq_restart)
403 ent = kcalloc(ulp->msix_requested, sizeof(*ent),
407 bnxt_fill_msix_vecs(bp, ent);
409 ops->ulp_irq_restart(ulp->handle, ent);
414 void bnxt_ulp_async_events(struct bnxt *bp, struct hwrm_async_event_cmpl *cmpl)
416 u16 event_id = le16_to_cpu(cmpl->event_id);
417 struct bnxt_en_dev *edev = bp->edev;
418 struct bnxt_ulp_ops *ops;
425 for (i = 0; i < BNXT_MAX_ULP; i++) {
426 struct bnxt_ulp *ulp = &edev->ulp_tbl[i];
428 ops = rcu_dereference(ulp->ulp_ops);
429 if (!ops || !ops->ulp_async_notifier)
431 if (!ulp->async_events_bmap ||
432 event_id > ulp->max_async_event_id)
435 /* Read max_async_event_id first before testing the bitmap. */
437 if (test_bit(event_id, ulp->async_events_bmap))
438 ops->ulp_async_notifier(ulp->handle, cmpl);
443 static int bnxt_register_async_events(struct bnxt_en_dev *edev, int ulp_id,
444 unsigned long *events_bmap, u16 max_id)
446 struct net_device *dev = edev->net;
447 struct bnxt *bp = netdev_priv(dev);
448 struct bnxt_ulp *ulp;
450 if (ulp_id >= BNXT_MAX_ULP)
453 ulp = &edev->ulp_tbl[ulp_id];
454 ulp->async_events_bmap = events_bmap;
455 /* Make sure bnxt_ulp_async_events() sees this order */
457 ulp->max_async_event_id = max_id;
458 bnxt_hwrm_func_drv_rgtr(bp, events_bmap, max_id + 1, true);
462 static 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,
471 struct bnxt_en_dev *bnxt_ulp_probe(struct net_device *dev)
473 struct bnxt *bp = netdev_priv(dev);
474 struct bnxt_en_dev *edev;
478 edev = kzalloc(sizeof(*edev), GFP_KERNEL);
480 return ERR_PTR(-ENOMEM);
481 edev->en_ops = &bnxt_en_ops_tbl;
482 if (bp->flags & BNXT_FLAG_ROCEV1_CAP)
483 edev->flags |= BNXT_EN_FLAG_ROCEV1_CAP;
484 if (bp->flags & BNXT_FLAG_ROCEV2_CAP)
485 edev->flags |= BNXT_EN_FLAG_ROCEV2_CAP;
487 edev->pdev = bp->pdev;
488 edev->l2_db_size = bp->db_size;
489 edev->l2_db_size_nc = bp->db_size;