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