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be2net: Add MCC queue mechanism for BE cmds
[deliverable/linux.git] / drivers / net / benet / be_main.c
1 /*
2 * Copyright (C) 2005 - 2009 ServerEngines
3 * All rights reserved.
4 *
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License version 2
7 * as published by the Free Software Foundation. The full GNU General
8 * Public License is included in this distribution in the file called COPYING.
9 *
10 * Contact Information:
11 * linux-drivers@serverengines.com
12 *
13 * ServerEngines
14 * 209 N. Fair Oaks Ave
15 * Sunnyvale, CA 94085
16 */
17
18 #include "be.h"
19 #include <asm/div64.h>
20
21 MODULE_VERSION(DRV_VER);
22 MODULE_DEVICE_TABLE(pci, be_dev_ids);
23 MODULE_DESCRIPTION(DRV_DESC " " DRV_VER);
24 MODULE_AUTHOR("ServerEngines Corporation");
25 MODULE_LICENSE("GPL");
26
27 static unsigned int rx_frag_size = 2048;
28 module_param(rx_frag_size, uint, S_IRUGO);
29 MODULE_PARM_DESC(rx_frag_size, "Size of a fragment that holds rcvd data.");
30
31 static DEFINE_PCI_DEVICE_TABLE(be_dev_ids) = {
32 { PCI_DEVICE(BE_VENDOR_ID, BE_DEVICE_ID1) },
33 { PCI_DEVICE(BE_VENDOR_ID, OC_DEVICE_ID1) },
34 { PCI_DEVICE(BE_VENDOR_ID, OC_DEVICE_ID2) },
35 { 0 }
36 };
37 MODULE_DEVICE_TABLE(pci, be_dev_ids);
38
39 static void be_queue_free(struct be_adapter *adapter, struct be_queue_info *q)
40 {
41 struct be_dma_mem *mem = &q->dma_mem;
42 if (mem->va)
43 pci_free_consistent(adapter->pdev, mem->size,
44 mem->va, mem->dma);
45 }
46
47 static int be_queue_alloc(struct be_adapter *adapter, struct be_queue_info *q,
48 u16 len, u16 entry_size)
49 {
50 struct be_dma_mem *mem = &q->dma_mem;
51
52 memset(q, 0, sizeof(*q));
53 q->len = len;
54 q->entry_size = entry_size;
55 mem->size = len * entry_size;
56 mem->va = pci_alloc_consistent(adapter->pdev, mem->size, &mem->dma);
57 if (!mem->va)
58 return -1;
59 memset(mem->va, 0, mem->size);
60 return 0;
61 }
62
63 static void be_intr_set(struct be_ctrl_info *ctrl, bool enable)
64 {
65 u8 __iomem *addr = ctrl->pcicfg + PCICFG_MEMBAR_CTRL_INT_CTRL_OFFSET;
66 u32 reg = ioread32(addr);
67 u32 enabled = reg & MEMBAR_CTRL_INT_CTRL_HOSTINTR_MASK;
68 if (!enabled && enable) {
69 reg |= MEMBAR_CTRL_INT_CTRL_HOSTINTR_MASK;
70 } else if (enabled && !enable) {
71 reg &= ~MEMBAR_CTRL_INT_CTRL_HOSTINTR_MASK;
72 } else {
73 printk(KERN_WARNING DRV_NAME
74 ": bad value in membar_int_ctrl reg=0x%x\n", reg);
75 return;
76 }
77 iowrite32(reg, addr);
78 }
79
80 static void be_rxq_notify(struct be_ctrl_info *ctrl, u16 qid, u16 posted)
81 {
82 u32 val = 0;
83 val |= qid & DB_RQ_RING_ID_MASK;
84 val |= posted << DB_RQ_NUM_POSTED_SHIFT;
85 iowrite32(val, ctrl->db + DB_RQ_OFFSET);
86 }
87
88 static void be_txq_notify(struct be_ctrl_info *ctrl, u16 qid, u16 posted)
89 {
90 u32 val = 0;
91 val |= qid & DB_TXULP_RING_ID_MASK;
92 val |= (posted & DB_TXULP_NUM_POSTED_MASK) << DB_TXULP_NUM_POSTED_SHIFT;
93 iowrite32(val, ctrl->db + DB_TXULP1_OFFSET);
94 }
95
96 static void be_eq_notify(struct be_ctrl_info *ctrl, u16 qid,
97 bool arm, bool clear_int, u16 num_popped)
98 {
99 u32 val = 0;
100 val |= qid & DB_EQ_RING_ID_MASK;
101 if (arm)
102 val |= 1 << DB_EQ_REARM_SHIFT;
103 if (clear_int)
104 val |= 1 << DB_EQ_CLR_SHIFT;
105 val |= 1 << DB_EQ_EVNT_SHIFT;
106 val |= num_popped << DB_EQ_NUM_POPPED_SHIFT;
107 iowrite32(val, ctrl->db + DB_EQ_OFFSET);
108 }
109
110 void be_cq_notify(struct be_ctrl_info *ctrl, u16 qid,
111 bool arm, u16 num_popped)
112 {
113 u32 val = 0;
114 val |= qid & DB_CQ_RING_ID_MASK;
115 if (arm)
116 val |= 1 << DB_CQ_REARM_SHIFT;
117 val |= num_popped << DB_CQ_NUM_POPPED_SHIFT;
118 iowrite32(val, ctrl->db + DB_CQ_OFFSET);
119 }
120
121
122 static int be_mac_addr_set(struct net_device *netdev, void *p)
123 {
124 struct be_adapter *adapter = netdev_priv(netdev);
125 struct sockaddr *addr = p;
126 int status = 0;
127
128 if (netif_running(netdev)) {
129 status = be_cmd_pmac_del(&adapter->ctrl, adapter->if_handle,
130 adapter->pmac_id);
131 if (status)
132 return status;
133
134 status = be_cmd_pmac_add(&adapter->ctrl, (u8 *)addr->sa_data,
135 adapter->if_handle, &adapter->pmac_id);
136 }
137
138 if (!status)
139 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
140
141 return status;
142 }
143
144 static void netdev_stats_update(struct be_adapter *adapter)
145 {
146 struct be_hw_stats *hw_stats = hw_stats_from_cmd(adapter->stats.cmd.va);
147 struct be_rxf_stats *rxf_stats = &hw_stats->rxf;
148 struct be_port_rxf_stats *port_stats =
149 &rxf_stats->port[adapter->port_num];
150 struct net_device_stats *dev_stats = &adapter->stats.net_stats;
151 struct be_erx_stats *erx_stats = &hw_stats->erx;
152
153 dev_stats->rx_packets = port_stats->rx_total_frames;
154 dev_stats->tx_packets = port_stats->tx_unicastframes +
155 port_stats->tx_multicastframes + port_stats->tx_broadcastframes;
156 dev_stats->rx_bytes = (u64) port_stats->rx_bytes_msd << 32 |
157 (u64) port_stats->rx_bytes_lsd;
158 dev_stats->tx_bytes = (u64) port_stats->tx_bytes_msd << 32 |
159 (u64) port_stats->tx_bytes_lsd;
160
161 /* bad pkts received */
162 dev_stats->rx_errors = port_stats->rx_crc_errors +
163 port_stats->rx_alignment_symbol_errors +
164 port_stats->rx_in_range_errors +
165 port_stats->rx_out_range_errors +
166 port_stats->rx_frame_too_long +
167 port_stats->rx_dropped_too_small +
168 port_stats->rx_dropped_too_short +
169 port_stats->rx_dropped_header_too_small +
170 port_stats->rx_dropped_tcp_length +
171 port_stats->rx_dropped_runt +
172 port_stats->rx_tcp_checksum_errs +
173 port_stats->rx_ip_checksum_errs +
174 port_stats->rx_udp_checksum_errs;
175
176 /* no space in linux buffers: best possible approximation */
177 dev_stats->rx_dropped = erx_stats->rx_drops_no_fragments[0];
178
179 /* detailed rx errors */
180 dev_stats->rx_length_errors = port_stats->rx_in_range_errors +
181 port_stats->rx_out_range_errors +
182 port_stats->rx_frame_too_long;
183
184 /* receive ring buffer overflow */
185 dev_stats->rx_over_errors = 0;
186
187 dev_stats->rx_crc_errors = port_stats->rx_crc_errors;
188
189 /* frame alignment errors */
190 dev_stats->rx_frame_errors = port_stats->rx_alignment_symbol_errors;
191
192 /* receiver fifo overrun */
193 /* drops_no_pbuf is no per i/f, it's per BE card */
194 dev_stats->rx_fifo_errors = port_stats->rx_fifo_overflow +
195 port_stats->rx_input_fifo_overflow +
196 rxf_stats->rx_drops_no_pbuf;
197 /* receiver missed packetd */
198 dev_stats->rx_missed_errors = 0;
199
200 /* packet transmit problems */
201 dev_stats->tx_errors = 0;
202
203 /* no space available in linux */
204 dev_stats->tx_dropped = 0;
205
206 dev_stats->multicast = port_stats->tx_multicastframes;
207 dev_stats->collisions = 0;
208
209 /* detailed tx_errors */
210 dev_stats->tx_aborted_errors = 0;
211 dev_stats->tx_carrier_errors = 0;
212 dev_stats->tx_fifo_errors = 0;
213 dev_stats->tx_heartbeat_errors = 0;
214 dev_stats->tx_window_errors = 0;
215 }
216
217 static void be_link_status_update(struct be_adapter *adapter)
218 {
219 struct be_link_info *prev = &adapter->link;
220 struct be_link_info now = { 0 };
221 struct net_device *netdev = adapter->netdev;
222
223 be_cmd_link_status_query(&adapter->ctrl, &now);
224
225 /* If link came up or went down */
226 if (now.speed != prev->speed && (now.speed == PHY_LINK_SPEED_ZERO ||
227 prev->speed == PHY_LINK_SPEED_ZERO)) {
228 if (now.speed == PHY_LINK_SPEED_ZERO) {
229 netif_stop_queue(netdev);
230 netif_carrier_off(netdev);
231 printk(KERN_INFO "%s: Link down\n", netdev->name);
232 } else {
233 netif_start_queue(netdev);
234 netif_carrier_on(netdev);
235 printk(KERN_INFO "%s: Link up\n", netdev->name);
236 }
237 }
238 *prev = now;
239 }
240
241 /* Update the EQ delay n BE based on the RX frags consumed / sec */
242 static void be_rx_eqd_update(struct be_adapter *adapter)
243 {
244 struct be_ctrl_info *ctrl = &adapter->ctrl;
245 struct be_eq_obj *rx_eq = &adapter->rx_eq;
246 struct be_drvr_stats *stats = &adapter->stats.drvr_stats;
247 ulong now = jiffies;
248 u32 eqd;
249
250 if (!rx_eq->enable_aic)
251 return;
252
253 /* Wrapped around */
254 if (time_before(now, stats->rx_fps_jiffies)) {
255 stats->rx_fps_jiffies = now;
256 return;
257 }
258
259 /* Update once a second */
260 if ((now - stats->rx_fps_jiffies) < HZ)
261 return;
262
263 stats->be_rx_fps = (stats->be_rx_frags - stats->be_prev_rx_frags) /
264 ((now - stats->rx_fps_jiffies) / HZ);
265
266 stats->rx_fps_jiffies = now;
267 stats->be_prev_rx_frags = stats->be_rx_frags;
268 eqd = stats->be_rx_fps / 110000;
269 eqd = eqd << 3;
270 if (eqd > rx_eq->max_eqd)
271 eqd = rx_eq->max_eqd;
272 if (eqd < rx_eq->min_eqd)
273 eqd = rx_eq->min_eqd;
274 if (eqd < 10)
275 eqd = 0;
276 if (eqd != rx_eq->cur_eqd)
277 be_cmd_modify_eqd(ctrl, rx_eq->q.id, eqd);
278
279 rx_eq->cur_eqd = eqd;
280 }
281
282 static struct net_device_stats *be_get_stats(struct net_device *dev)
283 {
284 struct be_adapter *adapter = netdev_priv(dev);
285
286 return &adapter->stats.net_stats;
287 }
288
289 static u32 be_calc_rate(u64 bytes, unsigned long ticks)
290 {
291 u64 rate = bytes;
292
293 do_div(rate, ticks / HZ);
294 rate <<= 3; /* bytes/sec -> bits/sec */
295 do_div(rate, 1000000ul); /* MB/Sec */
296
297 return rate;
298 }
299
300 static void be_tx_rate_update(struct be_adapter *adapter)
301 {
302 struct be_drvr_stats *stats = drvr_stats(adapter);
303 ulong now = jiffies;
304
305 /* Wrapped around? */
306 if (time_before(now, stats->be_tx_jiffies)) {
307 stats->be_tx_jiffies = now;
308 return;
309 }
310
311 /* Update tx rate once in two seconds */
312 if ((now - stats->be_tx_jiffies) > 2 * HZ) {
313 stats->be_tx_rate = be_calc_rate(stats->be_tx_bytes
314 - stats->be_tx_bytes_prev,
315 now - stats->be_tx_jiffies);
316 stats->be_tx_jiffies = now;
317 stats->be_tx_bytes_prev = stats->be_tx_bytes;
318 }
319 }
320
321 static void be_tx_stats_update(struct be_adapter *adapter,
322 u32 wrb_cnt, u32 copied, bool stopped)
323 {
324 struct be_drvr_stats *stats = drvr_stats(adapter);
325 stats->be_tx_reqs++;
326 stats->be_tx_wrbs += wrb_cnt;
327 stats->be_tx_bytes += copied;
328 if (stopped)
329 stats->be_tx_stops++;
330 }
331
332 /* Determine number of WRB entries needed to xmit data in an skb */
333 static u32 wrb_cnt_for_skb(struct sk_buff *skb, bool *dummy)
334 {
335 int cnt = (skb->len > skb->data_len);
336
337 cnt += skb_shinfo(skb)->nr_frags;
338
339 /* to account for hdr wrb */
340 cnt++;
341 if (cnt & 1) {
342 /* add a dummy to make it an even num */
343 cnt++;
344 *dummy = true;
345 } else
346 *dummy = false;
347 BUG_ON(cnt > BE_MAX_TX_FRAG_COUNT);
348 return cnt;
349 }
350
351 static inline void wrb_fill(struct be_eth_wrb *wrb, u64 addr, int len)
352 {
353 wrb->frag_pa_hi = upper_32_bits(addr);
354 wrb->frag_pa_lo = addr & 0xFFFFFFFF;
355 wrb->frag_len = len & ETH_WRB_FRAG_LEN_MASK;
356 }
357
358 static void wrb_fill_hdr(struct be_eth_hdr_wrb *hdr, struct sk_buff *skb,
359 bool vlan, u32 wrb_cnt, u32 len)
360 {
361 memset(hdr, 0, sizeof(*hdr));
362
363 AMAP_SET_BITS(struct amap_eth_hdr_wrb, crc, hdr, 1);
364
365 if (skb_shinfo(skb)->gso_segs > 1 && skb_shinfo(skb)->gso_size) {
366 AMAP_SET_BITS(struct amap_eth_hdr_wrb, lso, hdr, 1);
367 AMAP_SET_BITS(struct amap_eth_hdr_wrb, lso_mss,
368 hdr, skb_shinfo(skb)->gso_size);
369 } else if (skb->ip_summed == CHECKSUM_PARTIAL) {
370 if (is_tcp_pkt(skb))
371 AMAP_SET_BITS(struct amap_eth_hdr_wrb, tcpcs, hdr, 1);
372 else if (is_udp_pkt(skb))
373 AMAP_SET_BITS(struct amap_eth_hdr_wrb, udpcs, hdr, 1);
374 }
375
376 if (vlan && vlan_tx_tag_present(skb)) {
377 AMAP_SET_BITS(struct amap_eth_hdr_wrb, vlan, hdr, 1);
378 AMAP_SET_BITS(struct amap_eth_hdr_wrb, vlan_tag,
379 hdr, vlan_tx_tag_get(skb));
380 }
381
382 AMAP_SET_BITS(struct amap_eth_hdr_wrb, event, hdr, 1);
383 AMAP_SET_BITS(struct amap_eth_hdr_wrb, complete, hdr, 1);
384 AMAP_SET_BITS(struct amap_eth_hdr_wrb, num_wrb, hdr, wrb_cnt);
385 AMAP_SET_BITS(struct amap_eth_hdr_wrb, len, hdr, len);
386 }
387
388
389 static int make_tx_wrbs(struct be_adapter *adapter,
390 struct sk_buff *skb, u32 wrb_cnt, bool dummy_wrb)
391 {
392 u64 busaddr;
393 u32 i, copied = 0;
394 struct pci_dev *pdev = adapter->pdev;
395 struct sk_buff *first_skb = skb;
396 struct be_queue_info *txq = &adapter->tx_obj.q;
397 struct be_eth_wrb *wrb;
398 struct be_eth_hdr_wrb *hdr;
399
400 atomic_add(wrb_cnt, &txq->used);
401 hdr = queue_head_node(txq);
402 queue_head_inc(txq);
403
404 if (skb->len > skb->data_len) {
405 int len = skb->len - skb->data_len;
406 busaddr = pci_map_single(pdev, skb->data, len,
407 PCI_DMA_TODEVICE);
408 wrb = queue_head_node(txq);
409 wrb_fill(wrb, busaddr, len);
410 be_dws_cpu_to_le(wrb, sizeof(*wrb));
411 queue_head_inc(txq);
412 copied += len;
413 }
414
415 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
416 struct skb_frag_struct *frag =
417 &skb_shinfo(skb)->frags[i];
418 busaddr = pci_map_page(pdev, frag->page,
419 frag->page_offset,
420 frag->size, PCI_DMA_TODEVICE);
421 wrb = queue_head_node(txq);
422 wrb_fill(wrb, busaddr, frag->size);
423 be_dws_cpu_to_le(wrb, sizeof(*wrb));
424 queue_head_inc(txq);
425 copied += frag->size;
426 }
427
428 if (dummy_wrb) {
429 wrb = queue_head_node(txq);
430 wrb_fill(wrb, 0, 0);
431 be_dws_cpu_to_le(wrb, sizeof(*wrb));
432 queue_head_inc(txq);
433 }
434
435 wrb_fill_hdr(hdr, first_skb, adapter->vlan_grp ? true : false,
436 wrb_cnt, copied);
437 be_dws_cpu_to_le(hdr, sizeof(*hdr));
438
439 return copied;
440 }
441
442 static int be_xmit(struct sk_buff *skb, struct net_device *netdev)
443 {
444 struct be_adapter *adapter = netdev_priv(netdev);
445 struct be_tx_obj *tx_obj = &adapter->tx_obj;
446 struct be_queue_info *txq = &tx_obj->q;
447 u32 wrb_cnt = 0, copied = 0;
448 u32 start = txq->head;
449 bool dummy_wrb, stopped = false;
450
451 wrb_cnt = wrb_cnt_for_skb(skb, &dummy_wrb);
452
453 copied = make_tx_wrbs(adapter, skb, wrb_cnt, dummy_wrb);
454
455 /* record the sent skb in the sent_skb table */
456 BUG_ON(tx_obj->sent_skb_list[start]);
457 tx_obj->sent_skb_list[start] = skb;
458
459 /* Ensure that txq has space for the next skb; Else stop the queue
460 * *BEFORE* ringing the tx doorbell, so that we serialze the
461 * tx compls of the current transmit which'll wake up the queue
462 */
463 if ((BE_MAX_TX_FRAG_COUNT + atomic_read(&txq->used)) >= txq->len) {
464 netif_stop_queue(netdev);
465 stopped = true;
466 }
467
468 be_txq_notify(&adapter->ctrl, txq->id, wrb_cnt);
469
470 be_tx_stats_update(adapter, wrb_cnt, copied, stopped);
471 return NETDEV_TX_OK;
472 }
473
474 static int be_change_mtu(struct net_device *netdev, int new_mtu)
475 {
476 struct be_adapter *adapter = netdev_priv(netdev);
477 if (new_mtu < BE_MIN_MTU ||
478 new_mtu > BE_MAX_JUMBO_FRAME_SIZE) {
479 dev_info(&adapter->pdev->dev,
480 "MTU must be between %d and %d bytes\n",
481 BE_MIN_MTU, BE_MAX_JUMBO_FRAME_SIZE);
482 return -EINVAL;
483 }
484 dev_info(&adapter->pdev->dev, "MTU changed from %d to %d bytes\n",
485 netdev->mtu, new_mtu);
486 netdev->mtu = new_mtu;
487 return 0;
488 }
489
490 /*
491 * if there are BE_NUM_VLANS_SUPPORTED or lesser number of VLANS configured,
492 * program them in BE. If more than BE_NUM_VLANS_SUPPORTED are configured,
493 * set the BE in promiscuous VLAN mode.
494 */
495 static void be_vid_config(struct net_device *netdev)
496 {
497 struct be_adapter *adapter = netdev_priv(netdev);
498 u16 vtag[BE_NUM_VLANS_SUPPORTED];
499 u16 ntags = 0, i;
500
501 if (adapter->num_vlans <= BE_NUM_VLANS_SUPPORTED) {
502 /* Construct VLAN Table to give to HW */
503 for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) {
504 if (adapter->vlan_tag[i]) {
505 vtag[ntags] = cpu_to_le16(i);
506 ntags++;
507 }
508 }
509 be_cmd_vlan_config(&adapter->ctrl, adapter->if_handle,
510 vtag, ntags, 1, 0);
511 } else {
512 be_cmd_vlan_config(&adapter->ctrl, adapter->if_handle,
513 NULL, 0, 1, 1);
514 }
515 }
516
517 static void be_vlan_register(struct net_device *netdev, struct vlan_group *grp)
518 {
519 struct be_adapter *adapter = netdev_priv(netdev);
520 struct be_eq_obj *rx_eq = &adapter->rx_eq;
521 struct be_eq_obj *tx_eq = &adapter->tx_eq;
522 struct be_ctrl_info *ctrl = &adapter->ctrl;
523
524 be_eq_notify(ctrl, rx_eq->q.id, false, false, 0);
525 be_eq_notify(ctrl, tx_eq->q.id, false, false, 0);
526 adapter->vlan_grp = grp;
527 be_eq_notify(ctrl, rx_eq->q.id, true, false, 0);
528 be_eq_notify(ctrl, tx_eq->q.id, true, false, 0);
529 }
530
531 static void be_vlan_add_vid(struct net_device *netdev, u16 vid)
532 {
533 struct be_adapter *adapter = netdev_priv(netdev);
534
535 adapter->num_vlans++;
536 adapter->vlan_tag[vid] = 1;
537
538 be_vid_config(netdev);
539 }
540
541 static void be_vlan_rem_vid(struct net_device *netdev, u16 vid)
542 {
543 struct be_adapter *adapter = netdev_priv(netdev);
544
545 adapter->num_vlans--;
546 adapter->vlan_tag[vid] = 0;
547
548 vlan_group_set_device(adapter->vlan_grp, vid, NULL);
549 be_vid_config(netdev);
550 }
551
552 static void be_set_multicast_filter(struct net_device *netdev)
553 {
554 struct be_adapter *adapter = netdev_priv(netdev);
555 struct dev_mc_list *mc_ptr;
556 u8 mac_addr[32][ETH_ALEN];
557 int i = 0;
558
559 if (netdev->flags & IFF_ALLMULTI) {
560 /* set BE in Multicast promiscuous */
561 be_cmd_mcast_mac_set(&adapter->ctrl,
562 adapter->if_handle, NULL, 0, true);
563 return;
564 }
565
566 for (mc_ptr = netdev->mc_list; mc_ptr; mc_ptr = mc_ptr->next) {
567 memcpy(&mac_addr[i][0], mc_ptr->dmi_addr, ETH_ALEN);
568 if (++i >= 32) {
569 be_cmd_mcast_mac_set(&adapter->ctrl,
570 adapter->if_handle, &mac_addr[0][0], i, false);
571 i = 0;
572 }
573
574 }
575
576 if (i) {
577 /* reset the promiscuous mode also. */
578 be_cmd_mcast_mac_set(&adapter->ctrl,
579 adapter->if_handle, &mac_addr[0][0], i, false);
580 }
581 }
582
583 static void be_set_multicast_list(struct net_device *netdev)
584 {
585 struct be_adapter *adapter = netdev_priv(netdev);
586
587 if (netdev->flags & IFF_PROMISC) {
588 be_cmd_promiscuous_config(&adapter->ctrl, adapter->port_num, 1);
589 } else {
590 be_cmd_promiscuous_config(&adapter->ctrl, adapter->port_num, 0);
591 be_set_multicast_filter(netdev);
592 }
593 }
594
595 static void be_rx_rate_update(struct be_adapter *adapter)
596 {
597 struct be_drvr_stats *stats = drvr_stats(adapter);
598 ulong now = jiffies;
599
600 /* Wrapped around */
601 if (time_before(now, stats->be_rx_jiffies)) {
602 stats->be_rx_jiffies = now;
603 return;
604 }
605
606 /* Update the rate once in two seconds */
607 if ((now - stats->be_rx_jiffies) < 2 * HZ)
608 return;
609
610 stats->be_rx_rate = be_calc_rate(stats->be_rx_bytes
611 - stats->be_rx_bytes_prev,
612 now - stats->be_rx_jiffies);
613 stats->be_rx_jiffies = now;
614 stats->be_rx_bytes_prev = stats->be_rx_bytes;
615 }
616
617 static void be_rx_stats_update(struct be_adapter *adapter,
618 u32 pktsize, u16 numfrags)
619 {
620 struct be_drvr_stats *stats = drvr_stats(adapter);
621
622 stats->be_rx_compl++;
623 stats->be_rx_frags += numfrags;
624 stats->be_rx_bytes += pktsize;
625 }
626
627 static inline bool do_pkt_csum(struct be_eth_rx_compl *rxcp, bool cso)
628 {
629 u8 l4_cksm, ip_version, ipcksm, tcpf = 0, udpf = 0, ipv6_chk;
630
631 l4_cksm = AMAP_GET_BITS(struct amap_eth_rx_compl, l4_cksm, rxcp);
632 ipcksm = AMAP_GET_BITS(struct amap_eth_rx_compl, ipcksm, rxcp);
633 ip_version = AMAP_GET_BITS(struct amap_eth_rx_compl, ip_version, rxcp);
634 if (ip_version) {
635 tcpf = AMAP_GET_BITS(struct amap_eth_rx_compl, tcpf, rxcp);
636 udpf = AMAP_GET_BITS(struct amap_eth_rx_compl, udpf, rxcp);
637 }
638 ipv6_chk = (ip_version && (tcpf || udpf));
639
640 return ((l4_cksm && ipv6_chk && ipcksm) && cso) ? false : true;
641 }
642
643 static struct be_rx_page_info *
644 get_rx_page_info(struct be_adapter *adapter, u16 frag_idx)
645 {
646 struct be_rx_page_info *rx_page_info;
647 struct be_queue_info *rxq = &adapter->rx_obj.q;
648
649 rx_page_info = &adapter->rx_obj.page_info_tbl[frag_idx];
650 BUG_ON(!rx_page_info->page);
651
652 if (rx_page_info->last_page_user)
653 pci_unmap_page(adapter->pdev, pci_unmap_addr(rx_page_info, bus),
654 adapter->big_page_size, PCI_DMA_FROMDEVICE);
655
656 atomic_dec(&rxq->used);
657 return rx_page_info;
658 }
659
660 /* Throwaway the data in the Rx completion */
661 static void be_rx_compl_discard(struct be_adapter *adapter,
662 struct be_eth_rx_compl *rxcp)
663 {
664 struct be_queue_info *rxq = &adapter->rx_obj.q;
665 struct be_rx_page_info *page_info;
666 u16 rxq_idx, i, num_rcvd;
667
668 rxq_idx = AMAP_GET_BITS(struct amap_eth_rx_compl, fragndx, rxcp);
669 num_rcvd = AMAP_GET_BITS(struct amap_eth_rx_compl, numfrags, rxcp);
670
671 for (i = 0; i < num_rcvd; i++) {
672 page_info = get_rx_page_info(adapter, rxq_idx);
673 put_page(page_info->page);
674 memset(page_info, 0, sizeof(*page_info));
675 index_inc(&rxq_idx, rxq->len);
676 }
677 }
678
679 /*
680 * skb_fill_rx_data forms a complete skb for an ether frame
681 * indicated by rxcp.
682 */
683 static void skb_fill_rx_data(struct be_adapter *adapter,
684 struct sk_buff *skb, struct be_eth_rx_compl *rxcp)
685 {
686 struct be_queue_info *rxq = &adapter->rx_obj.q;
687 struct be_rx_page_info *page_info;
688 u16 rxq_idx, i, num_rcvd;
689 u32 pktsize, hdr_len, curr_frag_len;
690 u8 *start;
691
692 rxq_idx = AMAP_GET_BITS(struct amap_eth_rx_compl, fragndx, rxcp);
693 pktsize = AMAP_GET_BITS(struct amap_eth_rx_compl, pktsize, rxcp);
694 num_rcvd = AMAP_GET_BITS(struct amap_eth_rx_compl, numfrags, rxcp);
695
696 page_info = get_rx_page_info(adapter, rxq_idx);
697
698 start = page_address(page_info->page) + page_info->page_offset;
699 prefetch(start);
700
701 /* Copy data in the first descriptor of this completion */
702 curr_frag_len = min(pktsize, rx_frag_size);
703
704 /* Copy the header portion into skb_data */
705 hdr_len = min((u32)BE_HDR_LEN, curr_frag_len);
706 memcpy(skb->data, start, hdr_len);
707 skb->len = curr_frag_len;
708 if (curr_frag_len <= BE_HDR_LEN) { /* tiny packet */
709 /* Complete packet has now been moved to data */
710 put_page(page_info->page);
711 skb->data_len = 0;
712 skb->tail += curr_frag_len;
713 } else {
714 skb_shinfo(skb)->nr_frags = 1;
715 skb_shinfo(skb)->frags[0].page = page_info->page;
716 skb_shinfo(skb)->frags[0].page_offset =
717 page_info->page_offset + hdr_len;
718 skb_shinfo(skb)->frags[0].size = curr_frag_len - hdr_len;
719 skb->data_len = curr_frag_len - hdr_len;
720 skb->tail += hdr_len;
721 }
722 memset(page_info, 0, sizeof(*page_info));
723
724 if (pktsize <= rx_frag_size) {
725 BUG_ON(num_rcvd != 1);
726 goto done;
727 }
728
729 /* More frags present for this completion */
730 pktsize -= curr_frag_len; /* account for above copied frag */
731 for (i = 1; i < num_rcvd; i++) {
732 index_inc(&rxq_idx, rxq->len);
733 page_info = get_rx_page_info(adapter, rxq_idx);
734
735 curr_frag_len = min(pktsize, rx_frag_size);
736
737 skb_shinfo(skb)->frags[i].page = page_info->page;
738 skb_shinfo(skb)->frags[i].page_offset = page_info->page_offset;
739 skb_shinfo(skb)->frags[i].size = curr_frag_len;
740 skb->len += curr_frag_len;
741 skb->data_len += curr_frag_len;
742 skb_shinfo(skb)->nr_frags++;
743 pktsize -= curr_frag_len;
744
745 memset(page_info, 0, sizeof(*page_info));
746 }
747
748 done:
749 be_rx_stats_update(adapter, pktsize, num_rcvd);
750 return;
751 }
752
753 /* Process the RX completion indicated by rxcp when LRO is disabled */
754 static void be_rx_compl_process(struct be_adapter *adapter,
755 struct be_eth_rx_compl *rxcp)
756 {
757 struct sk_buff *skb;
758 u32 vtp, vid;
759
760 vtp = AMAP_GET_BITS(struct amap_eth_rx_compl, vtp, rxcp);
761
762 skb = netdev_alloc_skb(adapter->netdev, BE_HDR_LEN + NET_IP_ALIGN);
763 if (!skb) {
764 if (net_ratelimit())
765 dev_warn(&adapter->pdev->dev, "skb alloc failed\n");
766 be_rx_compl_discard(adapter, rxcp);
767 return;
768 }
769
770 skb_reserve(skb, NET_IP_ALIGN);
771
772 skb_fill_rx_data(adapter, skb, rxcp);
773
774 if (do_pkt_csum(rxcp, adapter->rx_csum))
775 skb->ip_summed = CHECKSUM_NONE;
776 else
777 skb->ip_summed = CHECKSUM_UNNECESSARY;
778
779 skb->truesize = skb->len + sizeof(struct sk_buff);
780 skb->protocol = eth_type_trans(skb, adapter->netdev);
781 skb->dev = adapter->netdev;
782
783 if (vtp) {
784 if (!adapter->vlan_grp || adapter->num_vlans == 0) {
785 kfree_skb(skb);
786 return;
787 }
788 vid = AMAP_GET_BITS(struct amap_eth_rx_compl, vlan_tag, rxcp);
789 vid = be16_to_cpu(vid);
790 vlan_hwaccel_receive_skb(skb, adapter->vlan_grp, vid);
791 } else {
792 netif_receive_skb(skb);
793 }
794
795 adapter->netdev->last_rx = jiffies;
796
797 return;
798 }
799
800 /* Process the RX completion indicated by rxcp when LRO is enabled */
801 static void be_rx_compl_process_lro(struct be_adapter *adapter,
802 struct be_eth_rx_compl *rxcp)
803 {
804 struct be_rx_page_info *page_info;
805 struct skb_frag_struct rx_frags[BE_MAX_FRAGS_PER_FRAME];
806 struct be_queue_info *rxq = &adapter->rx_obj.q;
807 u32 num_rcvd, pkt_size, remaining, vlanf, curr_frag_len;
808 u16 i, rxq_idx = 0, vid;
809
810 num_rcvd = AMAP_GET_BITS(struct amap_eth_rx_compl, numfrags, rxcp);
811 pkt_size = AMAP_GET_BITS(struct amap_eth_rx_compl, pktsize, rxcp);
812 vlanf = AMAP_GET_BITS(struct amap_eth_rx_compl, vtp, rxcp);
813 rxq_idx = AMAP_GET_BITS(struct amap_eth_rx_compl, fragndx, rxcp);
814
815 remaining = pkt_size;
816 for (i = 0; i < num_rcvd; i++) {
817 page_info = get_rx_page_info(adapter, rxq_idx);
818
819 curr_frag_len = min(remaining, rx_frag_size);
820
821 rx_frags[i].page = page_info->page;
822 rx_frags[i].page_offset = page_info->page_offset;
823 rx_frags[i].size = curr_frag_len;
824 remaining -= curr_frag_len;
825
826 index_inc(&rxq_idx, rxq->len);
827
828 memset(page_info, 0, sizeof(*page_info));
829 }
830
831 if (likely(!vlanf)) {
832 lro_receive_frags(&adapter->rx_obj.lro_mgr, rx_frags, pkt_size,
833 pkt_size, NULL, 0);
834 } else {
835 vid = AMAP_GET_BITS(struct amap_eth_rx_compl, vlan_tag, rxcp);
836 vid = be16_to_cpu(vid);
837
838 if (!adapter->vlan_grp || adapter->num_vlans == 0)
839 return;
840
841 lro_vlan_hwaccel_receive_frags(&adapter->rx_obj.lro_mgr,
842 rx_frags, pkt_size, pkt_size, adapter->vlan_grp,
843 vid, NULL, 0);
844 }
845
846 be_rx_stats_update(adapter, pkt_size, num_rcvd);
847 return;
848 }
849
850 static struct be_eth_rx_compl *be_rx_compl_get(struct be_adapter *adapter)
851 {
852 struct be_eth_rx_compl *rxcp = queue_tail_node(&adapter->rx_obj.cq);
853
854 if (rxcp->dw[offsetof(struct amap_eth_rx_compl, valid) / 32] == 0)
855 return NULL;
856
857 be_dws_le_to_cpu(rxcp, sizeof(*rxcp));
858
859 queue_tail_inc(&adapter->rx_obj.cq);
860 return rxcp;
861 }
862
863 /* To reset the valid bit, we need to reset the whole word as
864 * when walking the queue the valid entries are little-endian
865 * and invalid entries are host endian
866 */
867 static inline void be_rx_compl_reset(struct be_eth_rx_compl *rxcp)
868 {
869 rxcp->dw[offsetof(struct amap_eth_rx_compl, valid) / 32] = 0;
870 }
871
872 static inline struct page *be_alloc_pages(u32 size)
873 {
874 gfp_t alloc_flags = GFP_ATOMIC;
875 u32 order = get_order(size);
876 if (order > 0)
877 alloc_flags |= __GFP_COMP;
878 return alloc_pages(alloc_flags, order);
879 }
880
881 /*
882 * Allocate a page, split it to fragments of size rx_frag_size and post as
883 * receive buffers to BE
884 */
885 static void be_post_rx_frags(struct be_adapter *adapter)
886 {
887 struct be_rx_page_info *page_info_tbl = adapter->rx_obj.page_info_tbl;
888 struct be_rx_page_info *page_info = NULL;
889 struct be_queue_info *rxq = &adapter->rx_obj.q;
890 struct page *pagep = NULL;
891 struct be_eth_rx_d *rxd;
892 u64 page_dmaaddr = 0, frag_dmaaddr;
893 u32 posted, page_offset = 0;
894
895 page_info = &page_info_tbl[rxq->head];
896 for (posted = 0; posted < MAX_RX_POST && !page_info->page; posted++) {
897 if (!pagep) {
898 pagep = be_alloc_pages(adapter->big_page_size);
899 if (unlikely(!pagep)) {
900 drvr_stats(adapter)->be_ethrx_post_fail++;
901 break;
902 }
903 page_dmaaddr = pci_map_page(adapter->pdev, pagep, 0,
904 adapter->big_page_size,
905 PCI_DMA_FROMDEVICE);
906 page_info->page_offset = 0;
907 } else {
908 get_page(pagep);
909 page_info->page_offset = page_offset + rx_frag_size;
910 }
911 page_offset = page_info->page_offset;
912 page_info->page = pagep;
913 pci_unmap_addr_set(page_info, bus, page_dmaaddr);
914 frag_dmaaddr = page_dmaaddr + page_info->page_offset;
915
916 rxd = queue_head_node(rxq);
917 rxd->fragpa_lo = cpu_to_le32(frag_dmaaddr & 0xFFFFFFFF);
918 rxd->fragpa_hi = cpu_to_le32(upper_32_bits(frag_dmaaddr));
919 queue_head_inc(rxq);
920
921 /* Any space left in the current big page for another frag? */
922 if ((page_offset + rx_frag_size + rx_frag_size) >
923 adapter->big_page_size) {
924 pagep = NULL;
925 page_info->last_page_user = true;
926 }
927 page_info = &page_info_tbl[rxq->head];
928 }
929 if (pagep)
930 page_info->last_page_user = true;
931
932 if (posted) {
933 atomic_add(posted, &rxq->used);
934 be_rxq_notify(&adapter->ctrl, rxq->id, posted);
935 } else if (atomic_read(&rxq->used) == 0) {
936 /* Let be_worker replenish when memory is available */
937 adapter->rx_post_starved = true;
938 }
939
940 return;
941 }
942
943 static struct be_eth_tx_compl *be_tx_compl_get(struct be_queue_info *tx_cq)
944 {
945 struct be_eth_tx_compl *txcp = queue_tail_node(tx_cq);
946
947 if (txcp->dw[offsetof(struct amap_eth_tx_compl, valid) / 32] == 0)
948 return NULL;
949
950 be_dws_le_to_cpu(txcp, sizeof(*txcp));
951
952 txcp->dw[offsetof(struct amap_eth_tx_compl, valid) / 32] = 0;
953
954 queue_tail_inc(tx_cq);
955 return txcp;
956 }
957
958 static void be_tx_compl_process(struct be_adapter *adapter, u16 last_index)
959 {
960 struct be_queue_info *txq = &adapter->tx_obj.q;
961 struct be_eth_wrb *wrb;
962 struct sk_buff **sent_skbs = adapter->tx_obj.sent_skb_list;
963 struct sk_buff *sent_skb;
964 u64 busaddr;
965 u16 cur_index, num_wrbs = 0;
966
967 cur_index = txq->tail;
968 sent_skb = sent_skbs[cur_index];
969 BUG_ON(!sent_skb);
970 sent_skbs[cur_index] = NULL;
971
972 do {
973 cur_index = txq->tail;
974 wrb = queue_tail_node(txq);
975 be_dws_le_to_cpu(wrb, sizeof(*wrb));
976 busaddr = ((u64)wrb->frag_pa_hi << 32) | (u64)wrb->frag_pa_lo;
977 if (busaddr != 0) {
978 pci_unmap_single(adapter->pdev, busaddr,
979 wrb->frag_len, PCI_DMA_TODEVICE);
980 }
981 num_wrbs++;
982 queue_tail_inc(txq);
983 } while (cur_index != last_index);
984
985 atomic_sub(num_wrbs, &txq->used);
986
987 kfree_skb(sent_skb);
988 }
989
990 static void be_rx_q_clean(struct be_adapter *adapter)
991 {
992 struct be_rx_page_info *page_info;
993 struct be_queue_info *rxq = &adapter->rx_obj.q;
994 struct be_queue_info *rx_cq = &adapter->rx_obj.cq;
995 struct be_eth_rx_compl *rxcp;
996 u16 tail;
997
998 /* First cleanup pending rx completions */
999 while ((rxcp = be_rx_compl_get(adapter)) != NULL) {
1000 be_rx_compl_discard(adapter, rxcp);
1001 be_rx_compl_reset(rxcp);
1002 be_cq_notify(&adapter->ctrl, rx_cq->id, true, 1);
1003 }
1004
1005 /* Then free posted rx buffer that were not used */
1006 tail = (rxq->head + rxq->len - atomic_read(&rxq->used)) % rxq->len;
1007 for (; tail != rxq->head; index_inc(&tail, rxq->len)) {
1008 page_info = get_rx_page_info(adapter, tail);
1009 put_page(page_info->page);
1010 memset(page_info, 0, sizeof(*page_info));
1011 }
1012 BUG_ON(atomic_read(&rxq->used));
1013 }
1014
1015 static void be_tx_q_clean(struct be_adapter *adapter)
1016 {
1017 struct sk_buff **sent_skbs = adapter->tx_obj.sent_skb_list;
1018 struct sk_buff *sent_skb;
1019 struct be_queue_info *txq = &adapter->tx_obj.q;
1020 u16 last_index;
1021 bool dummy_wrb;
1022
1023 while (atomic_read(&txq->used)) {
1024 sent_skb = sent_skbs[txq->tail];
1025 last_index = txq->tail;
1026 index_adv(&last_index,
1027 wrb_cnt_for_skb(sent_skb, &dummy_wrb) - 1, txq->len);
1028 be_tx_compl_process(adapter, last_index);
1029 }
1030 }
1031
1032 static void be_mcc_queues_destroy(struct be_adapter *adapter)
1033 {
1034 struct be_queue_info *q;
1035 struct be_ctrl_info *ctrl = &adapter->ctrl;
1036
1037 q = &ctrl->mcc_obj.q;
1038 if (q->created)
1039 be_cmd_q_destroy(ctrl, q, QTYPE_MCCQ);
1040 be_queue_free(adapter, q);
1041
1042 q = &ctrl->mcc_obj.cq;
1043 if (q->created)
1044 be_cmd_q_destroy(ctrl, q, QTYPE_CQ);
1045 be_queue_free(adapter, q);
1046 }
1047
1048 /* Must be called only after TX qs are created as MCC shares TX EQ */
1049 static int be_mcc_queues_create(struct be_adapter *adapter)
1050 {
1051 struct be_queue_info *q, *cq;
1052 struct be_ctrl_info *ctrl = &adapter->ctrl;
1053
1054 /* Alloc MCC compl queue */
1055 cq = &ctrl->mcc_obj.cq;
1056 if (be_queue_alloc(adapter, cq, MCC_CQ_LEN,
1057 sizeof(struct be_mcc_cq_entry)))
1058 goto err;
1059
1060 /* Ask BE to create MCC compl queue; share TX's eq */
1061 if (be_cmd_cq_create(ctrl, cq, &adapter->tx_eq.q, false, true, 0))
1062 goto mcc_cq_free;
1063
1064 /* Alloc MCC queue */
1065 q = &ctrl->mcc_obj.q;
1066 if (be_queue_alloc(adapter, q, MCC_Q_LEN, sizeof(struct be_mcc_wrb)))
1067 goto mcc_cq_destroy;
1068
1069 /* Ask BE to create MCC queue */
1070 if (be_cmd_mccq_create(ctrl, q, cq))
1071 goto mcc_q_free;
1072
1073 return 0;
1074
1075 mcc_q_free:
1076 be_queue_free(adapter, q);
1077 mcc_cq_destroy:
1078 be_cmd_q_destroy(ctrl, cq, QTYPE_CQ);
1079 mcc_cq_free:
1080 be_queue_free(adapter, cq);
1081 err:
1082 return -1;
1083 }
1084
1085 static void be_tx_queues_destroy(struct be_adapter *adapter)
1086 {
1087 struct be_queue_info *q;
1088
1089 q = &adapter->tx_obj.q;
1090 if (q->created) {
1091 be_cmd_q_destroy(&adapter->ctrl, q, QTYPE_TXQ);
1092
1093 /* No more tx completions can be rcvd now; clean up if there
1094 * are any pending completions or pending tx requests */
1095 be_tx_q_clean(adapter);
1096 }
1097 be_queue_free(adapter, q);
1098
1099 q = &adapter->tx_obj.cq;
1100 if (q->created)
1101 be_cmd_q_destroy(&adapter->ctrl, q, QTYPE_CQ);
1102 be_queue_free(adapter, q);
1103
1104 q = &adapter->tx_eq.q;
1105 if (q->created)
1106 be_cmd_q_destroy(&adapter->ctrl, q, QTYPE_EQ);
1107 be_queue_free(adapter, q);
1108 }
1109
1110 static int be_tx_queues_create(struct be_adapter *adapter)
1111 {
1112 struct be_queue_info *eq, *q, *cq;
1113
1114 adapter->tx_eq.max_eqd = 0;
1115 adapter->tx_eq.min_eqd = 0;
1116 adapter->tx_eq.cur_eqd = 96;
1117 adapter->tx_eq.enable_aic = false;
1118 /* Alloc Tx Event queue */
1119 eq = &adapter->tx_eq.q;
1120 if (be_queue_alloc(adapter, eq, EVNT_Q_LEN, sizeof(struct be_eq_entry)))
1121 return -1;
1122
1123 /* Ask BE to create Tx Event queue */
1124 if (be_cmd_eq_create(&adapter->ctrl, eq, adapter->tx_eq.cur_eqd))
1125 goto tx_eq_free;
1126 /* Alloc TX eth compl queue */
1127 cq = &adapter->tx_obj.cq;
1128 if (be_queue_alloc(adapter, cq, TX_CQ_LEN,
1129 sizeof(struct be_eth_tx_compl)))
1130 goto tx_eq_destroy;
1131
1132 /* Ask BE to create Tx eth compl queue */
1133 if (be_cmd_cq_create(&adapter->ctrl, cq, eq, false, false, 3))
1134 goto tx_cq_free;
1135
1136 /* Alloc TX eth queue */
1137 q = &adapter->tx_obj.q;
1138 if (be_queue_alloc(adapter, q, TX_Q_LEN, sizeof(struct be_eth_wrb)))
1139 goto tx_cq_destroy;
1140
1141 /* Ask BE to create Tx eth queue */
1142 if (be_cmd_txq_create(&adapter->ctrl, q, cq))
1143 goto tx_q_free;
1144 return 0;
1145
1146 tx_q_free:
1147 be_queue_free(adapter, q);
1148 tx_cq_destroy:
1149 be_cmd_q_destroy(&adapter->ctrl, cq, QTYPE_CQ);
1150 tx_cq_free:
1151 be_queue_free(adapter, cq);
1152 tx_eq_destroy:
1153 be_cmd_q_destroy(&adapter->ctrl, eq, QTYPE_EQ);
1154 tx_eq_free:
1155 be_queue_free(adapter, eq);
1156 return -1;
1157 }
1158
1159 static void be_rx_queues_destroy(struct be_adapter *adapter)
1160 {
1161 struct be_queue_info *q;
1162
1163 q = &adapter->rx_obj.q;
1164 if (q->created) {
1165 be_cmd_q_destroy(&adapter->ctrl, q, QTYPE_RXQ);
1166 be_rx_q_clean(adapter);
1167 }
1168 be_queue_free(adapter, q);
1169
1170 q = &adapter->rx_obj.cq;
1171 if (q->created)
1172 be_cmd_q_destroy(&adapter->ctrl, q, QTYPE_CQ);
1173 be_queue_free(adapter, q);
1174
1175 q = &adapter->rx_eq.q;
1176 if (q->created)
1177 be_cmd_q_destroy(&adapter->ctrl, q, QTYPE_EQ);
1178 be_queue_free(adapter, q);
1179 }
1180
1181 static int be_rx_queues_create(struct be_adapter *adapter)
1182 {
1183 struct be_queue_info *eq, *q, *cq;
1184 int rc;
1185
1186 adapter->max_rx_coal = BE_MAX_FRAGS_PER_FRAME;
1187 adapter->big_page_size = (1 << get_order(rx_frag_size)) * PAGE_SIZE;
1188 adapter->rx_eq.max_eqd = BE_MAX_EQD;
1189 adapter->rx_eq.min_eqd = 0;
1190 adapter->rx_eq.cur_eqd = 0;
1191 adapter->rx_eq.enable_aic = true;
1192
1193 /* Alloc Rx Event queue */
1194 eq = &adapter->rx_eq.q;
1195 rc = be_queue_alloc(adapter, eq, EVNT_Q_LEN,
1196 sizeof(struct be_eq_entry));
1197 if (rc)
1198 return rc;
1199
1200 /* Ask BE to create Rx Event queue */
1201 rc = be_cmd_eq_create(&adapter->ctrl, eq, adapter->rx_eq.cur_eqd);
1202 if (rc)
1203 goto rx_eq_free;
1204
1205 /* Alloc RX eth compl queue */
1206 cq = &adapter->rx_obj.cq;
1207 rc = be_queue_alloc(adapter, cq, RX_CQ_LEN,
1208 sizeof(struct be_eth_rx_compl));
1209 if (rc)
1210 goto rx_eq_destroy;
1211
1212 /* Ask BE to create Rx eth compl queue */
1213 rc = be_cmd_cq_create(&adapter->ctrl, cq, eq, false, false, 3);
1214 if (rc)
1215 goto rx_cq_free;
1216
1217 /* Alloc RX eth queue */
1218 q = &adapter->rx_obj.q;
1219 rc = be_queue_alloc(adapter, q, RX_Q_LEN, sizeof(struct be_eth_rx_d));
1220 if (rc)
1221 goto rx_cq_destroy;
1222
1223 /* Ask BE to create Rx eth queue */
1224 rc = be_cmd_rxq_create(&adapter->ctrl, q, cq->id, rx_frag_size,
1225 BE_MAX_JUMBO_FRAME_SIZE, adapter->if_handle, false);
1226 if (rc)
1227 goto rx_q_free;
1228
1229 return 0;
1230 rx_q_free:
1231 be_queue_free(adapter, q);
1232 rx_cq_destroy:
1233 be_cmd_q_destroy(&adapter->ctrl, cq, QTYPE_CQ);
1234 rx_cq_free:
1235 be_queue_free(adapter, cq);
1236 rx_eq_destroy:
1237 be_cmd_q_destroy(&adapter->ctrl, eq, QTYPE_EQ);
1238 rx_eq_free:
1239 be_queue_free(adapter, eq);
1240 return rc;
1241 }
1242 static bool event_get(struct be_eq_obj *eq_obj, u16 *rid)
1243 {
1244 struct be_eq_entry *entry = queue_tail_node(&eq_obj->q);
1245 u32 evt = entry->evt;
1246
1247 if (!evt)
1248 return false;
1249
1250 evt = le32_to_cpu(evt);
1251 *rid = (evt >> EQ_ENTRY_RES_ID_SHIFT) & EQ_ENTRY_RES_ID_MASK;
1252 entry->evt = 0;
1253 queue_tail_inc(&eq_obj->q);
1254 return true;
1255 }
1256
1257 static int event_handle(struct be_ctrl_info *ctrl,
1258 struct be_eq_obj *eq_obj)
1259 {
1260 u16 rid = 0, num = 0;
1261
1262 while (event_get(eq_obj, &rid))
1263 num++;
1264
1265 /* We can see an interrupt and no event */
1266 be_eq_notify(ctrl, eq_obj->q.id, true, true, num);
1267 if (num)
1268 napi_schedule(&eq_obj->napi);
1269
1270 return num;
1271 }
1272
1273 static irqreturn_t be_intx(int irq, void *dev)
1274 {
1275 struct be_adapter *adapter = dev;
1276 struct be_ctrl_info *ctrl = &adapter->ctrl;
1277 int rx, tx;
1278
1279 tx = event_handle(ctrl, &adapter->tx_eq);
1280 rx = event_handle(ctrl, &adapter->rx_eq);
1281
1282 if (rx || tx)
1283 return IRQ_HANDLED;
1284 else
1285 return IRQ_NONE;
1286 }
1287
1288 static irqreturn_t be_msix_rx(int irq, void *dev)
1289 {
1290 struct be_adapter *adapter = dev;
1291
1292 event_handle(&adapter->ctrl, &adapter->rx_eq);
1293
1294 return IRQ_HANDLED;
1295 }
1296
1297 static irqreturn_t be_msix_tx_mcc(int irq, void *dev)
1298 {
1299 struct be_adapter *adapter = dev;
1300
1301 event_handle(&adapter->ctrl, &adapter->tx_eq);
1302
1303 return IRQ_HANDLED;
1304 }
1305
1306 static inline bool do_lro(struct be_adapter *adapter,
1307 struct be_eth_rx_compl *rxcp)
1308 {
1309 int err = AMAP_GET_BITS(struct amap_eth_rx_compl, err, rxcp);
1310 int tcp_frame = AMAP_GET_BITS(struct amap_eth_rx_compl, tcpf, rxcp);
1311
1312 if (err)
1313 drvr_stats(adapter)->be_rxcp_err++;
1314
1315 return (!tcp_frame || err || (adapter->max_rx_coal <= 1)) ?
1316 false : true;
1317 }
1318
1319 int be_poll_rx(struct napi_struct *napi, int budget)
1320 {
1321 struct be_eq_obj *rx_eq = container_of(napi, struct be_eq_obj, napi);
1322 struct be_adapter *adapter =
1323 container_of(rx_eq, struct be_adapter, rx_eq);
1324 struct be_queue_info *rx_cq = &adapter->rx_obj.cq;
1325 struct be_eth_rx_compl *rxcp;
1326 u32 work_done;
1327
1328 for (work_done = 0; work_done < budget; work_done++) {
1329 rxcp = be_rx_compl_get(adapter);
1330 if (!rxcp)
1331 break;
1332
1333 if (do_lro(adapter, rxcp))
1334 be_rx_compl_process_lro(adapter, rxcp);
1335 else
1336 be_rx_compl_process(adapter, rxcp);
1337
1338 be_rx_compl_reset(rxcp);
1339 }
1340
1341 lro_flush_all(&adapter->rx_obj.lro_mgr);
1342
1343 /* Refill the queue */
1344 if (atomic_read(&adapter->rx_obj.q.used) < RX_FRAGS_REFILL_WM)
1345 be_post_rx_frags(adapter);
1346
1347 /* All consumed */
1348 if (work_done < budget) {
1349 napi_complete(napi);
1350 be_cq_notify(&adapter->ctrl, rx_cq->id, true, work_done);
1351 } else {
1352 /* More to be consumed; continue with interrupts disabled */
1353 be_cq_notify(&adapter->ctrl, rx_cq->id, false, work_done);
1354 }
1355 return work_done;
1356 }
1357
1358 void be_process_tx(struct be_adapter *adapter)
1359 {
1360 struct be_queue_info *txq = &adapter->tx_obj.q;
1361 struct be_queue_info *tx_cq = &adapter->tx_obj.cq;
1362 struct be_eth_tx_compl *txcp;
1363 u32 num_cmpl = 0;
1364 u16 end_idx;
1365
1366 while ((txcp = be_tx_compl_get(tx_cq))) {
1367 end_idx = AMAP_GET_BITS(struct amap_eth_tx_compl,
1368 wrb_index, txcp);
1369 be_tx_compl_process(adapter, end_idx);
1370 num_cmpl++;
1371 }
1372
1373 if (num_cmpl) {
1374 be_cq_notify(&adapter->ctrl, tx_cq->id, true, num_cmpl);
1375
1376 /* As Tx wrbs have been freed up, wake up netdev queue if
1377 * it was stopped due to lack of tx wrbs.
1378 */
1379 if (netif_queue_stopped(adapter->netdev) &&
1380 atomic_read(&txq->used) < txq->len / 2) {
1381 netif_wake_queue(adapter->netdev);
1382 }
1383
1384 drvr_stats(adapter)->be_tx_events++;
1385 drvr_stats(adapter)->be_tx_compl += num_cmpl;
1386 }
1387 }
1388
1389 /* As TX and MCC share the same EQ check for both TX and MCC completions.
1390 * For TX/MCC we don't honour budget; consume everything
1391 */
1392 static int be_poll_tx_mcc(struct napi_struct *napi, int budget)
1393 {
1394 struct be_eq_obj *tx_eq = container_of(napi, struct be_eq_obj, napi);
1395 struct be_adapter *adapter =
1396 container_of(tx_eq, struct be_adapter, tx_eq);
1397
1398 napi_complete(napi);
1399
1400 be_process_tx(adapter);
1401
1402 be_process_mcc(&adapter->ctrl);
1403
1404 return 1;
1405 }
1406
1407 static void be_worker(struct work_struct *work)
1408 {
1409 struct be_adapter *adapter =
1410 container_of(work, struct be_adapter, work.work);
1411 int status;
1412
1413 /* Check link */
1414 be_link_status_update(adapter);
1415
1416 /* Get Stats */
1417 status = be_cmd_get_stats(&adapter->ctrl, &adapter->stats.cmd);
1418 if (!status)
1419 netdev_stats_update(adapter);
1420
1421 /* Set EQ delay */
1422 be_rx_eqd_update(adapter);
1423
1424 be_tx_rate_update(adapter);
1425 be_rx_rate_update(adapter);
1426
1427 if (adapter->rx_post_starved) {
1428 adapter->rx_post_starved = false;
1429 be_post_rx_frags(adapter);
1430 }
1431
1432 schedule_delayed_work(&adapter->work, msecs_to_jiffies(1000));
1433 }
1434
1435 static void be_msix_enable(struct be_adapter *adapter)
1436 {
1437 int i, status;
1438
1439 for (i = 0; i < BE_NUM_MSIX_VECTORS; i++)
1440 adapter->msix_entries[i].entry = i;
1441
1442 status = pci_enable_msix(adapter->pdev, adapter->msix_entries,
1443 BE_NUM_MSIX_VECTORS);
1444 if (status == 0)
1445 adapter->msix_enabled = true;
1446 return;
1447 }
1448
1449 static inline int be_msix_vec_get(struct be_adapter *adapter, u32 eq_id)
1450 {
1451 return adapter->msix_entries[eq_id -
1452 8 * adapter->ctrl.pci_func].vector;
1453 }
1454
1455 static int be_msix_register(struct be_adapter *adapter)
1456 {
1457 struct net_device *netdev = adapter->netdev;
1458 struct be_eq_obj *tx_eq = &adapter->tx_eq;
1459 struct be_eq_obj *rx_eq = &adapter->rx_eq;
1460 int status, vec;
1461
1462 sprintf(tx_eq->desc, "%s-tx", netdev->name);
1463 vec = be_msix_vec_get(adapter, tx_eq->q.id);
1464 status = request_irq(vec, be_msix_tx_mcc, 0, tx_eq->desc, adapter);
1465 if (status)
1466 goto err;
1467
1468 sprintf(rx_eq->desc, "%s-rx", netdev->name);
1469 vec = be_msix_vec_get(adapter, rx_eq->q.id);
1470 status = request_irq(vec, be_msix_rx, 0, rx_eq->desc, adapter);
1471 if (status) { /* Free TX IRQ */
1472 vec = be_msix_vec_get(adapter, tx_eq->q.id);
1473 free_irq(vec, adapter);
1474 goto err;
1475 }
1476 return 0;
1477 err:
1478 dev_warn(&adapter->pdev->dev,
1479 "MSIX Request IRQ failed - err %d\n", status);
1480 pci_disable_msix(adapter->pdev);
1481 adapter->msix_enabled = false;
1482 return status;
1483 }
1484
1485 static int be_irq_register(struct be_adapter *adapter)
1486 {
1487 struct net_device *netdev = adapter->netdev;
1488 int status;
1489
1490 if (adapter->msix_enabled) {
1491 status = be_msix_register(adapter);
1492 if (status == 0)
1493 goto done;
1494 }
1495
1496 /* INTx */
1497 netdev->irq = adapter->pdev->irq;
1498 status = request_irq(netdev->irq, be_intx, IRQF_SHARED, netdev->name,
1499 adapter);
1500 if (status) {
1501 dev_err(&adapter->pdev->dev,
1502 "INTx request IRQ failed - err %d\n", status);
1503 return status;
1504 }
1505 done:
1506 adapter->isr_registered = true;
1507 return 0;
1508 }
1509
1510 static void be_irq_unregister(struct be_adapter *adapter)
1511 {
1512 struct net_device *netdev = adapter->netdev;
1513 int vec;
1514
1515 if (!adapter->isr_registered)
1516 return;
1517
1518 /* INTx */
1519 if (!adapter->msix_enabled) {
1520 free_irq(netdev->irq, adapter);
1521 goto done;
1522 }
1523
1524 /* MSIx */
1525 vec = be_msix_vec_get(adapter, adapter->tx_eq.q.id);
1526 free_irq(vec, adapter);
1527 vec = be_msix_vec_get(adapter, adapter->rx_eq.q.id);
1528 free_irq(vec, adapter);
1529 done:
1530 adapter->isr_registered = false;
1531 return;
1532 }
1533
1534 static int be_open(struct net_device *netdev)
1535 {
1536 struct be_adapter *adapter = netdev_priv(netdev);
1537 struct be_ctrl_info *ctrl = &adapter->ctrl;
1538 struct be_eq_obj *rx_eq = &adapter->rx_eq;
1539 struct be_eq_obj *tx_eq = &adapter->tx_eq;
1540
1541 /* First time posting */
1542 be_post_rx_frags(adapter);
1543
1544 napi_enable(&rx_eq->napi);
1545 napi_enable(&tx_eq->napi);
1546
1547 be_irq_register(adapter);
1548
1549 be_intr_set(ctrl, true);
1550
1551 /* The evt queues are created in unarmed state; arm them */
1552 be_eq_notify(ctrl, rx_eq->q.id, true, false, 0);
1553 be_eq_notify(ctrl, tx_eq->q.id, true, false, 0);
1554
1555 /* Rx compl queue may be in unarmed state; rearm it */
1556 be_cq_notify(ctrl, adapter->rx_obj.cq.id, true, 0);
1557
1558 be_link_status_update(adapter);
1559
1560 schedule_delayed_work(&adapter->work, msecs_to_jiffies(100));
1561 return 0;
1562 }
1563
1564 static int be_setup(struct be_adapter *adapter)
1565 {
1566 struct be_ctrl_info *ctrl = &adapter->ctrl;
1567 struct net_device *netdev = adapter->netdev;
1568 u32 if_flags;
1569 int status;
1570
1571 if_flags = BE_IF_FLAGS_BROADCAST | BE_IF_FLAGS_PROMISCUOUS |
1572 BE_IF_FLAGS_MCAST_PROMISCUOUS | BE_IF_FLAGS_UNTAGGED |
1573 BE_IF_FLAGS_PASS_L3L4_ERRORS;
1574 status = be_cmd_if_create(ctrl, if_flags, netdev->dev_addr,
1575 false/* pmac_invalid */, &adapter->if_handle,
1576 &adapter->pmac_id);
1577 if (status != 0)
1578 goto do_none;
1579
1580 be_vid_config(netdev);
1581
1582 status = be_cmd_set_flow_control(ctrl, true, true);
1583 if (status != 0)
1584 goto if_destroy;
1585
1586 status = be_tx_queues_create(adapter);
1587 if (status != 0)
1588 goto if_destroy;
1589
1590 status = be_rx_queues_create(adapter);
1591 if (status != 0)
1592 goto tx_qs_destroy;
1593
1594 status = be_mcc_queues_create(adapter);
1595 if (status != 0)
1596 goto rx_qs_destroy;
1597
1598 return 0;
1599
1600 rx_qs_destroy:
1601 be_rx_queues_destroy(adapter);
1602 tx_qs_destroy:
1603 be_tx_queues_destroy(adapter);
1604 if_destroy:
1605 be_cmd_if_destroy(ctrl, adapter->if_handle);
1606 do_none:
1607 return status;
1608 }
1609
1610 static int be_clear(struct be_adapter *adapter)
1611 {
1612 struct be_ctrl_info *ctrl = &adapter->ctrl;
1613
1614 be_rx_queues_destroy(adapter);
1615 be_tx_queues_destroy(adapter);
1616
1617 be_cmd_if_destroy(ctrl, adapter->if_handle);
1618
1619 be_mcc_queues_destroy(adapter);
1620 return 0;
1621 }
1622
1623 static int be_close(struct net_device *netdev)
1624 {
1625 struct be_adapter *adapter = netdev_priv(netdev);
1626 struct be_ctrl_info *ctrl = &adapter->ctrl;
1627 struct be_eq_obj *rx_eq = &adapter->rx_eq;
1628 struct be_eq_obj *tx_eq = &adapter->tx_eq;
1629 int vec;
1630
1631 cancel_delayed_work_sync(&adapter->work);
1632
1633 netif_stop_queue(netdev);
1634 netif_carrier_off(netdev);
1635 adapter->link.speed = PHY_LINK_SPEED_ZERO;
1636
1637 be_intr_set(ctrl, false);
1638
1639 if (adapter->msix_enabled) {
1640 vec = be_msix_vec_get(adapter, tx_eq->q.id);
1641 synchronize_irq(vec);
1642 vec = be_msix_vec_get(adapter, rx_eq->q.id);
1643 synchronize_irq(vec);
1644 } else {
1645 synchronize_irq(netdev->irq);
1646 }
1647 be_irq_unregister(adapter);
1648
1649 napi_disable(&rx_eq->napi);
1650 napi_disable(&tx_eq->napi);
1651
1652 return 0;
1653 }
1654
1655 static int be_get_frag_header(struct skb_frag_struct *frag, void **mac_hdr,
1656 void **ip_hdr, void **tcpudp_hdr,
1657 u64 *hdr_flags, void *priv)
1658 {
1659 struct ethhdr *eh;
1660 struct vlan_ethhdr *veh;
1661 struct iphdr *iph;
1662 u8 *va = page_address(frag->page) + frag->page_offset;
1663 unsigned long ll_hlen;
1664
1665 prefetch(va);
1666 eh = (struct ethhdr *)va;
1667 *mac_hdr = eh;
1668 ll_hlen = ETH_HLEN;
1669 if (eh->h_proto != htons(ETH_P_IP)) {
1670 if (eh->h_proto == htons(ETH_P_8021Q)) {
1671 veh = (struct vlan_ethhdr *)va;
1672 if (veh->h_vlan_encapsulated_proto != htons(ETH_P_IP))
1673 return -1;
1674
1675 ll_hlen += VLAN_HLEN;
1676 } else {
1677 return -1;
1678 }
1679 }
1680 *hdr_flags = LRO_IPV4;
1681 iph = (struct iphdr *)(va + ll_hlen);
1682 *ip_hdr = iph;
1683 if (iph->protocol != IPPROTO_TCP)
1684 return -1;
1685 *hdr_flags |= LRO_TCP;
1686 *tcpudp_hdr = (u8 *) (*ip_hdr) + (iph->ihl << 2);
1687
1688 return 0;
1689 }
1690
1691 static void be_lro_init(struct be_adapter *adapter, struct net_device *netdev)
1692 {
1693 struct net_lro_mgr *lro_mgr;
1694
1695 lro_mgr = &adapter->rx_obj.lro_mgr;
1696 lro_mgr->dev = netdev;
1697 lro_mgr->features = LRO_F_NAPI;
1698 lro_mgr->ip_summed = CHECKSUM_UNNECESSARY;
1699 lro_mgr->ip_summed_aggr = CHECKSUM_UNNECESSARY;
1700 lro_mgr->max_desc = BE_MAX_LRO_DESCRIPTORS;
1701 lro_mgr->lro_arr = adapter->rx_obj.lro_desc;
1702 lro_mgr->get_frag_header = be_get_frag_header;
1703 lro_mgr->max_aggr = BE_MAX_FRAGS_PER_FRAME;
1704 }
1705
1706 static struct net_device_ops be_netdev_ops = {
1707 .ndo_open = be_open,
1708 .ndo_stop = be_close,
1709 .ndo_start_xmit = be_xmit,
1710 .ndo_get_stats = be_get_stats,
1711 .ndo_set_rx_mode = be_set_multicast_list,
1712 .ndo_set_mac_address = be_mac_addr_set,
1713 .ndo_change_mtu = be_change_mtu,
1714 .ndo_validate_addr = eth_validate_addr,
1715 .ndo_vlan_rx_register = be_vlan_register,
1716 .ndo_vlan_rx_add_vid = be_vlan_add_vid,
1717 .ndo_vlan_rx_kill_vid = be_vlan_rem_vid,
1718 };
1719
1720 static void be_netdev_init(struct net_device *netdev)
1721 {
1722 struct be_adapter *adapter = netdev_priv(netdev);
1723
1724 netdev->features |= NETIF_F_SG | NETIF_F_HW_VLAN_RX | NETIF_F_TSO |
1725 NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_FILTER | NETIF_F_IP_CSUM |
1726 NETIF_F_IPV6_CSUM;
1727
1728 netdev->flags |= IFF_MULTICAST;
1729
1730 adapter->rx_csum = true;
1731
1732 BE_SET_NETDEV_OPS(netdev, &be_netdev_ops);
1733
1734 SET_ETHTOOL_OPS(netdev, &be_ethtool_ops);
1735
1736 be_lro_init(adapter, netdev);
1737
1738 netif_napi_add(netdev, &adapter->rx_eq.napi, be_poll_rx,
1739 BE_NAPI_WEIGHT);
1740 netif_napi_add(netdev, &adapter->tx_eq.napi, be_poll_tx_mcc,
1741 BE_NAPI_WEIGHT);
1742
1743 netif_carrier_off(netdev);
1744 netif_stop_queue(netdev);
1745 }
1746
1747 static void be_unmap_pci_bars(struct be_adapter *adapter)
1748 {
1749 struct be_ctrl_info *ctrl = &adapter->ctrl;
1750 if (ctrl->csr)
1751 iounmap(ctrl->csr);
1752 if (ctrl->db)
1753 iounmap(ctrl->db);
1754 if (ctrl->pcicfg)
1755 iounmap(ctrl->pcicfg);
1756 }
1757
1758 static int be_map_pci_bars(struct be_adapter *adapter)
1759 {
1760 u8 __iomem *addr;
1761
1762 addr = ioremap_nocache(pci_resource_start(adapter->pdev, 2),
1763 pci_resource_len(adapter->pdev, 2));
1764 if (addr == NULL)
1765 return -ENOMEM;
1766 adapter->ctrl.csr = addr;
1767
1768 addr = ioremap_nocache(pci_resource_start(adapter->pdev, 4),
1769 128 * 1024);
1770 if (addr == NULL)
1771 goto pci_map_err;
1772 adapter->ctrl.db = addr;
1773
1774 addr = ioremap_nocache(pci_resource_start(adapter->pdev, 1),
1775 pci_resource_len(adapter->pdev, 1));
1776 if (addr == NULL)
1777 goto pci_map_err;
1778 adapter->ctrl.pcicfg = addr;
1779
1780 return 0;
1781 pci_map_err:
1782 be_unmap_pci_bars(adapter);
1783 return -ENOMEM;
1784 }
1785
1786
1787 static void be_ctrl_cleanup(struct be_adapter *adapter)
1788 {
1789 struct be_dma_mem *mem = &adapter->ctrl.mbox_mem_alloced;
1790
1791 be_unmap_pci_bars(adapter);
1792
1793 if (mem->va)
1794 pci_free_consistent(adapter->pdev, mem->size,
1795 mem->va, mem->dma);
1796 }
1797
1798 /* Initialize the mbox required to send cmds to BE */
1799 static int be_ctrl_init(struct be_adapter *adapter)
1800 {
1801 struct be_ctrl_info *ctrl = &adapter->ctrl;
1802 struct be_dma_mem *mbox_mem_alloc = &ctrl->mbox_mem_alloced;
1803 struct be_dma_mem *mbox_mem_align = &ctrl->mbox_mem;
1804 int status;
1805 u32 val;
1806
1807 status = be_map_pci_bars(adapter);
1808 if (status)
1809 return status;
1810
1811 mbox_mem_alloc->size = sizeof(struct be_mcc_mailbox) + 16;
1812 mbox_mem_alloc->va = pci_alloc_consistent(adapter->pdev,
1813 mbox_mem_alloc->size, &mbox_mem_alloc->dma);
1814 if (!mbox_mem_alloc->va) {
1815 be_unmap_pci_bars(adapter);
1816 return -1;
1817 }
1818 mbox_mem_align->size = sizeof(struct be_mcc_mailbox);
1819 mbox_mem_align->va = PTR_ALIGN(mbox_mem_alloc->va, 16);
1820 mbox_mem_align->dma = PTR_ALIGN(mbox_mem_alloc->dma, 16);
1821 memset(mbox_mem_align->va, 0, sizeof(struct be_mcc_mailbox));
1822 spin_lock_init(&ctrl->mbox_lock);
1823 spin_lock_init(&ctrl->mcc_lock);
1824 spin_lock_init(&ctrl->mcc_cq_lock);
1825
1826 val = ioread32(ctrl->pcicfg + PCICFG_MEMBAR_CTRL_INT_CTRL_OFFSET);
1827 ctrl->pci_func = (val >> MEMBAR_CTRL_INT_CTRL_PFUNC_SHIFT) &
1828 MEMBAR_CTRL_INT_CTRL_PFUNC_MASK;
1829 return 0;
1830 }
1831
1832 static void be_stats_cleanup(struct be_adapter *adapter)
1833 {
1834 struct be_stats_obj *stats = &adapter->stats;
1835 struct be_dma_mem *cmd = &stats->cmd;
1836
1837 if (cmd->va)
1838 pci_free_consistent(adapter->pdev, cmd->size,
1839 cmd->va, cmd->dma);
1840 }
1841
1842 static int be_stats_init(struct be_adapter *adapter)
1843 {
1844 struct be_stats_obj *stats = &adapter->stats;
1845 struct be_dma_mem *cmd = &stats->cmd;
1846
1847 cmd->size = sizeof(struct be_cmd_req_get_stats);
1848 cmd->va = pci_alloc_consistent(adapter->pdev, cmd->size, &cmd->dma);
1849 if (cmd->va == NULL)
1850 return -1;
1851 return 0;
1852 }
1853
1854 static void __devexit be_remove(struct pci_dev *pdev)
1855 {
1856 struct be_adapter *adapter = pci_get_drvdata(pdev);
1857 if (!adapter)
1858 return;
1859
1860 unregister_netdev(adapter->netdev);
1861
1862 be_clear(adapter);
1863
1864 be_stats_cleanup(adapter);
1865
1866 be_ctrl_cleanup(adapter);
1867
1868 if (adapter->msix_enabled) {
1869 pci_disable_msix(adapter->pdev);
1870 adapter->msix_enabled = false;
1871 }
1872
1873 pci_set_drvdata(pdev, NULL);
1874 pci_release_regions(pdev);
1875 pci_disable_device(pdev);
1876
1877 free_netdev(adapter->netdev);
1878 }
1879
1880 static int be_hw_up(struct be_adapter *adapter)
1881 {
1882 struct be_ctrl_info *ctrl = &adapter->ctrl;
1883 int status;
1884
1885 status = be_cmd_POST(ctrl);
1886 if (status)
1887 return status;
1888
1889 status = be_cmd_get_fw_ver(ctrl, adapter->fw_ver);
1890 if (status)
1891 return status;
1892
1893 status = be_cmd_query_fw_cfg(ctrl, &adapter->port_num);
1894 return status;
1895 }
1896
1897 static int __devinit be_probe(struct pci_dev *pdev,
1898 const struct pci_device_id *pdev_id)
1899 {
1900 int status = 0;
1901 struct be_adapter *adapter;
1902 struct net_device *netdev;
1903 struct be_ctrl_info *ctrl;
1904 u8 mac[ETH_ALEN];
1905
1906 status = pci_enable_device(pdev);
1907 if (status)
1908 goto do_none;
1909
1910 status = pci_request_regions(pdev, DRV_NAME);
1911 if (status)
1912 goto disable_dev;
1913 pci_set_master(pdev);
1914
1915 netdev = alloc_etherdev(sizeof(struct be_adapter));
1916 if (netdev == NULL) {
1917 status = -ENOMEM;
1918 goto rel_reg;
1919 }
1920 adapter = netdev_priv(netdev);
1921 adapter->pdev = pdev;
1922 pci_set_drvdata(pdev, adapter);
1923 adapter->netdev = netdev;
1924
1925 be_msix_enable(adapter);
1926
1927 status = pci_set_dma_mask(pdev, DMA_BIT_MASK(64));
1928 if (!status) {
1929 netdev->features |= NETIF_F_HIGHDMA;
1930 } else {
1931 status = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
1932 if (status) {
1933 dev_err(&pdev->dev, "Could not set PCI DMA Mask\n");
1934 goto free_netdev;
1935 }
1936 }
1937
1938 ctrl = &adapter->ctrl;
1939 status = be_ctrl_init(adapter);
1940 if (status)
1941 goto free_netdev;
1942
1943 status = be_stats_init(adapter);
1944 if (status)
1945 goto ctrl_clean;
1946
1947 status = be_hw_up(adapter);
1948 if (status)
1949 goto stats_clean;
1950
1951 status = be_cmd_mac_addr_query(ctrl, mac, MAC_ADDRESS_TYPE_NETWORK,
1952 true /* permanent */, 0);
1953 if (status)
1954 goto stats_clean;
1955 memcpy(netdev->dev_addr, mac, ETH_ALEN);
1956
1957 INIT_DELAYED_WORK(&adapter->work, be_worker);
1958 be_netdev_init(netdev);
1959 SET_NETDEV_DEV(netdev, &adapter->pdev->dev);
1960
1961 status = be_setup(adapter);
1962 if (status)
1963 goto stats_clean;
1964 status = register_netdev(netdev);
1965 if (status != 0)
1966 goto unsetup;
1967
1968 dev_info(&pdev->dev, "%s port %d\n", nic_name(pdev), adapter->port_num);
1969 return 0;
1970
1971 unsetup:
1972 be_clear(adapter);
1973 stats_clean:
1974 be_stats_cleanup(adapter);
1975 ctrl_clean:
1976 be_ctrl_cleanup(adapter);
1977 free_netdev:
1978 free_netdev(adapter->netdev);
1979 rel_reg:
1980 pci_release_regions(pdev);
1981 disable_dev:
1982 pci_disable_device(pdev);
1983 do_none:
1984 dev_err(&pdev->dev, "%s initialization failed\n", nic_name(pdev));
1985 return status;
1986 }
1987
1988 static int be_suspend(struct pci_dev *pdev, pm_message_t state)
1989 {
1990 struct be_adapter *adapter = pci_get_drvdata(pdev);
1991 struct net_device *netdev = adapter->netdev;
1992
1993 netif_device_detach(netdev);
1994 if (netif_running(netdev)) {
1995 rtnl_lock();
1996 be_close(netdev);
1997 be_clear(adapter);
1998 rtnl_unlock();
1999 }
2000
2001 pci_save_state(pdev);
2002 pci_disable_device(pdev);
2003 pci_set_power_state(pdev, pci_choose_state(pdev, state));
2004 return 0;
2005 }
2006
2007 static int be_resume(struct pci_dev *pdev)
2008 {
2009 int status = 0;
2010 struct be_adapter *adapter = pci_get_drvdata(pdev);
2011 struct net_device *netdev = adapter->netdev;
2012
2013 netif_device_detach(netdev);
2014
2015 status = pci_enable_device(pdev);
2016 if (status)
2017 return status;
2018
2019 pci_set_power_state(pdev, 0);
2020 pci_restore_state(pdev);
2021
2022 if (netif_running(netdev)) {
2023 rtnl_lock();
2024 be_setup(adapter);
2025 be_open(netdev);
2026 rtnl_unlock();
2027 }
2028 netif_device_attach(netdev);
2029 return 0;
2030 }
2031
2032 static struct pci_driver be_driver = {
2033 .name = DRV_NAME,
2034 .id_table = be_dev_ids,
2035 .probe = be_probe,
2036 .remove = be_remove,
2037 .suspend = be_suspend,
2038 .resume = be_resume
2039 };
2040
2041 static int __init be_init_module(void)
2042 {
2043 if (rx_frag_size != 8192 && rx_frag_size != 4096
2044 && rx_frag_size != 2048) {
2045 printk(KERN_WARNING DRV_NAME
2046 " : Module param rx_frag_size must be 2048/4096/8192."
2047 " Using 2048\n");
2048 rx_frag_size = 2048;
2049 }
2050 /* Ensure rx_frag_size is aligned to chache line */
2051 if (SKB_DATA_ALIGN(rx_frag_size) != rx_frag_size) {
2052 printk(KERN_WARNING DRV_NAME
2053 " : Bad module param rx_frag_size. Using 2048\n");
2054 rx_frag_size = 2048;
2055 }
2056
2057 return pci_register_driver(&be_driver);
2058 }
2059 module_init(be_init_module);
2060
2061 static void __exit be_exit_module(void)
2062 {
2063 pci_unregister_driver(&be_driver);
2064 }
2065 module_exit(be_exit_module);
Linux kernel - Deliverables
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