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qlcnic: Fix loopback diagnostic test
[deliverable/linux.git] / drivers / net / ethernet / qlogic / qlcnic / qlcnic_io.c
1 /*
2 * QLogic qlcnic NIC Driver
3 * Copyright (c) 2009-2013 QLogic Corporation
4 *
5 * See LICENSE.qlcnic for copyright and licensing details.
6 */
7
8 #include <linux/netdevice.h>
9 #include <linux/if_vlan.h>
10 #include <net/ip.h>
11 #include <linux/ipv6.h>
12 #include <net/checksum.h>
13
14 #include "qlcnic.h"
15
16 #define TX_ETHER_PKT 0x01
17 #define TX_TCP_PKT 0x02
18 #define TX_UDP_PKT 0x03
19 #define TX_IP_PKT 0x04
20 #define TX_TCP_LSO 0x05
21 #define TX_TCP_LSO6 0x06
22 #define TX_TCPV6_PKT 0x0b
23 #define TX_UDPV6_PKT 0x0c
24 #define FLAGS_VLAN_TAGGED 0x10
25 #define FLAGS_VLAN_OOB 0x40
26
27 #define qlcnic_set_tx_vlan_tci(cmd_desc, v) \
28 (cmd_desc)->vlan_TCI = cpu_to_le16(v);
29 #define qlcnic_set_cmd_desc_port(cmd_desc, var) \
30 ((cmd_desc)->port_ctxid |= ((var) & 0x0F))
31 #define qlcnic_set_cmd_desc_ctxid(cmd_desc, var) \
32 ((cmd_desc)->port_ctxid |= ((var) << 4 & 0xF0))
33
34 #define qlcnic_set_tx_port(_desc, _port) \
35 ((_desc)->port_ctxid = ((_port) & 0xf) | (((_port) << 4) & 0xf0))
36
37 #define qlcnic_set_tx_flags_opcode(_desc, _flags, _opcode) \
38 ((_desc)->flags_opcode |= \
39 cpu_to_le16(((_flags) & 0x7f) | (((_opcode) & 0x3f) << 7)))
40
41 #define qlcnic_set_tx_frags_len(_desc, _frags, _len) \
42 ((_desc)->nfrags__length = \
43 cpu_to_le32(((_frags) & 0xff) | (((_len) & 0xffffff) << 8)))
44
45 /* owner bits of status_desc */
46 #define STATUS_OWNER_HOST (0x1ULL << 56)
47 #define STATUS_OWNER_PHANTOM (0x2ULL << 56)
48
49 /* Status descriptor:
50 0-3 port, 4-7 status, 8-11 type, 12-27 total_length
51 28-43 reference_handle, 44-47 protocol, 48-52 pkt_offset
52 53-55 desc_cnt, 56-57 owner, 58-63 opcode
53 */
54 #define qlcnic_get_sts_port(sts_data) \
55 ((sts_data) & 0x0F)
56 #define qlcnic_get_sts_status(sts_data) \
57 (((sts_data) >> 4) & 0x0F)
58 #define qlcnic_get_sts_type(sts_data) \
59 (((sts_data) >> 8) & 0x0F)
60 #define qlcnic_get_sts_totallength(sts_data) \
61 (((sts_data) >> 12) & 0xFFFF)
62 #define qlcnic_get_sts_refhandle(sts_data) \
63 (((sts_data) >> 28) & 0xFFFF)
64 #define qlcnic_get_sts_prot(sts_data) \
65 (((sts_data) >> 44) & 0x0F)
66 #define qlcnic_get_sts_pkt_offset(sts_data) \
67 (((sts_data) >> 48) & 0x1F)
68 #define qlcnic_get_sts_desc_cnt(sts_data) \
69 (((sts_data) >> 53) & 0x7)
70 #define qlcnic_get_sts_opcode(sts_data) \
71 (((sts_data) >> 58) & 0x03F)
72
73 #define qlcnic_get_lro_sts_refhandle(sts_data) \
74 ((sts_data) & 0x07FFF)
75 #define qlcnic_get_lro_sts_length(sts_data) \
76 (((sts_data) >> 16) & 0x0FFFF)
77 #define qlcnic_get_lro_sts_l2_hdr_offset(sts_data) \
78 (((sts_data) >> 32) & 0x0FF)
79 #define qlcnic_get_lro_sts_l4_hdr_offset(sts_data) \
80 (((sts_data) >> 40) & 0x0FF)
81 #define qlcnic_get_lro_sts_timestamp(sts_data) \
82 (((sts_data) >> 48) & 0x1)
83 #define qlcnic_get_lro_sts_type(sts_data) \
84 (((sts_data) >> 49) & 0x7)
85 #define qlcnic_get_lro_sts_push_flag(sts_data) \
86 (((sts_data) >> 52) & 0x1)
87 #define qlcnic_get_lro_sts_seq_number(sts_data) \
88 ((sts_data) & 0x0FFFFFFFF)
89 #define qlcnic_get_lro_sts_mss(sts_data1) \
90 ((sts_data1 >> 32) & 0x0FFFF)
91
92 #define qlcnic_83xx_get_lro_sts_mss(sts) ((sts) & 0xffff)
93
94 /* opcode field in status_desc */
95 #define QLCNIC_SYN_OFFLOAD 0x03
96 #define QLCNIC_RXPKT_DESC 0x04
97 #define QLCNIC_OLD_RXPKT_DESC 0x3f
98 #define QLCNIC_RESPONSE_DESC 0x05
99 #define QLCNIC_LRO_DESC 0x12
100
101 #define QLCNIC_TX_POLL_BUDGET 128
102 #define QLCNIC_TCP_HDR_SIZE 20
103 #define QLCNIC_TCP_TS_OPTION_SIZE 12
104 #define QLCNIC_FETCH_RING_ID(handle) ((handle) >> 63)
105 #define QLCNIC_DESC_OWNER_FW cpu_to_le64(STATUS_OWNER_PHANTOM)
106
107 #define QLCNIC_TCP_TS_HDR_SIZE (QLCNIC_TCP_HDR_SIZE + QLCNIC_TCP_TS_OPTION_SIZE)
108
109 /* for status field in status_desc */
110 #define STATUS_CKSUM_LOOP 0
111 #define STATUS_CKSUM_OK 2
112
113 #define qlcnic_83xx_pktln(sts) ((sts >> 32) & 0x3FFF)
114 #define qlcnic_83xx_hndl(sts) ((sts >> 48) & 0x7FFF)
115 #define qlcnic_83xx_csum_status(sts) ((sts >> 39) & 7)
116 #define qlcnic_83xx_opcode(sts) ((sts >> 42) & 0xF)
117 #define qlcnic_83xx_vlan_tag(sts) (((sts) >> 48) & 0xFFFF)
118 #define qlcnic_83xx_lro_pktln(sts) (((sts) >> 32) & 0x3FFF)
119 #define qlcnic_83xx_l2_hdr_off(sts) (((sts) >> 16) & 0xFF)
120 #define qlcnic_83xx_l4_hdr_off(sts) (((sts) >> 24) & 0xFF)
121 #define qlcnic_83xx_pkt_cnt(sts) (((sts) >> 16) & 0x7)
122 #define qlcnic_83xx_is_tstamp(sts) (((sts) >> 40) & 1)
123 #define qlcnic_83xx_is_psh_bit(sts) (((sts) >> 41) & 1)
124 #define qlcnic_83xx_is_ip_align(sts) (((sts) >> 46) & 1)
125 #define qlcnic_83xx_has_vlan_tag(sts) (((sts) >> 47) & 1)
126
127 struct sk_buff *qlcnic_process_rxbuf(struct qlcnic_adapter *,
128 struct qlcnic_host_rds_ring *, u16, u16);
129
130 inline void qlcnic_enable_tx_intr(struct qlcnic_adapter *adapter,
131 struct qlcnic_host_tx_ring *tx_ring)
132 {
133 if (qlcnic_check_multi_tx(adapter) &&
134 !adapter->ahw->diag_test)
135 writel(0x0, tx_ring->crb_intr_mask);
136 }
137
138
139 static inline void qlcnic_disable_tx_int(struct qlcnic_adapter *adapter,
140 struct qlcnic_host_tx_ring *tx_ring)
141 {
142 if (qlcnic_check_multi_tx(adapter) &&
143 !adapter->ahw->diag_test)
144 writel(1, tx_ring->crb_intr_mask);
145 }
146
147 inline void qlcnic_83xx_enable_tx_intr(struct qlcnic_adapter *adapter,
148 struct qlcnic_host_tx_ring *tx_ring)
149 {
150 writel(0, tx_ring->crb_intr_mask);
151 }
152
153 inline void qlcnic_83xx_disable_tx_intr(struct qlcnic_adapter *adapter,
154 struct qlcnic_host_tx_ring *tx_ring)
155 {
156 writel(1, tx_ring->crb_intr_mask);
157 }
158
159 static inline u8 qlcnic_mac_hash(u64 mac)
160 {
161 return (u8)((mac & 0xff) ^ ((mac >> 40) & 0xff));
162 }
163
164 static inline u32 qlcnic_get_ref_handle(struct qlcnic_adapter *adapter,
165 u16 handle, u8 ring_id)
166 {
167 if (qlcnic_83xx_check(adapter))
168 return handle | (ring_id << 15);
169 else
170 return handle;
171 }
172
173 static inline int qlcnic_82xx_is_lb_pkt(u64 sts_data)
174 {
175 return (qlcnic_get_sts_status(sts_data) == STATUS_CKSUM_LOOP) ? 1 : 0;
176 }
177
178 static void qlcnic_delete_rx_list_mac(struct qlcnic_adapter *adapter,
179 struct qlcnic_filter *fil,
180 void *addr, u16 vlan_id)
181 {
182 int ret;
183 u8 op;
184
185 op = vlan_id ? QLCNIC_MAC_VLAN_ADD : QLCNIC_MAC_ADD;
186 ret = qlcnic_sre_macaddr_change(adapter, addr, vlan_id, op);
187 if (ret)
188 return;
189
190 op = vlan_id ? QLCNIC_MAC_VLAN_DEL : QLCNIC_MAC_DEL;
191 ret = qlcnic_sre_macaddr_change(adapter, addr, vlan_id, op);
192 if (!ret) {
193 hlist_del(&fil->fnode);
194 adapter->rx_fhash.fnum--;
195 }
196 }
197
198 static struct qlcnic_filter *qlcnic_find_mac_filter(struct hlist_head *head,
199 void *addr, u16 vlan_id)
200 {
201 struct qlcnic_filter *tmp_fil = NULL;
202 struct hlist_node *n;
203
204 hlist_for_each_entry_safe(tmp_fil, n, head, fnode) {
205 if (!memcmp(tmp_fil->faddr, addr, ETH_ALEN) &&
206 tmp_fil->vlan_id == vlan_id)
207 return tmp_fil;
208 }
209
210 return NULL;
211 }
212
213 void qlcnic_add_lb_filter(struct qlcnic_adapter *adapter, struct sk_buff *skb,
214 int loopback_pkt, u16 vlan_id)
215 {
216 struct ethhdr *phdr = (struct ethhdr *)(skb->data);
217 struct qlcnic_filter *fil, *tmp_fil;
218 struct hlist_head *head;
219 unsigned long time;
220 u64 src_addr = 0;
221 u8 hindex, op;
222 int ret;
223
224 memcpy(&src_addr, phdr->h_source, ETH_ALEN);
225 hindex = qlcnic_mac_hash(src_addr) &
226 (adapter->fhash.fbucket_size - 1);
227
228 if (loopback_pkt) {
229 if (adapter->rx_fhash.fnum >= adapter->rx_fhash.fmax)
230 return;
231
232 head = &(adapter->rx_fhash.fhead[hindex]);
233
234 tmp_fil = qlcnic_find_mac_filter(head, &src_addr, vlan_id);
235 if (tmp_fil) {
236 time = tmp_fil->ftime;
237 if (time_after(jiffies, QLCNIC_READD_AGE * HZ + time))
238 tmp_fil->ftime = jiffies;
239 return;
240 }
241
242 fil = kzalloc(sizeof(struct qlcnic_filter), GFP_ATOMIC);
243 if (!fil)
244 return;
245
246 fil->ftime = jiffies;
247 memcpy(fil->faddr, &src_addr, ETH_ALEN);
248 fil->vlan_id = vlan_id;
249 spin_lock(&adapter->rx_mac_learn_lock);
250 hlist_add_head(&(fil->fnode), head);
251 adapter->rx_fhash.fnum++;
252 spin_unlock(&adapter->rx_mac_learn_lock);
253 } else {
254 head = &adapter->fhash.fhead[hindex];
255
256 spin_lock(&adapter->mac_learn_lock);
257
258 tmp_fil = qlcnic_find_mac_filter(head, &src_addr, vlan_id);
259 if (tmp_fil) {
260 op = vlan_id ? QLCNIC_MAC_VLAN_DEL : QLCNIC_MAC_DEL;
261 ret = qlcnic_sre_macaddr_change(adapter,
262 (u8 *)&src_addr,
263 vlan_id, op);
264 if (!ret) {
265 hlist_del(&tmp_fil->fnode);
266 adapter->fhash.fnum--;
267 }
268
269 spin_unlock(&adapter->mac_learn_lock);
270
271 return;
272 }
273
274 spin_unlock(&adapter->mac_learn_lock);
275
276 head = &adapter->rx_fhash.fhead[hindex];
277
278 spin_lock(&adapter->rx_mac_learn_lock);
279
280 tmp_fil = qlcnic_find_mac_filter(head, &src_addr, vlan_id);
281 if (tmp_fil)
282 qlcnic_delete_rx_list_mac(adapter, tmp_fil, &src_addr,
283 vlan_id);
284
285 spin_unlock(&adapter->rx_mac_learn_lock);
286 }
287 }
288
289 void qlcnic_82xx_change_filter(struct qlcnic_adapter *adapter, u64 *uaddr,
290 u16 vlan_id)
291 {
292 struct cmd_desc_type0 *hwdesc;
293 struct qlcnic_nic_req *req;
294 struct qlcnic_mac_req *mac_req;
295 struct qlcnic_vlan_req *vlan_req;
296 struct qlcnic_host_tx_ring *tx_ring = adapter->tx_ring;
297 u32 producer;
298 u64 word;
299
300 producer = tx_ring->producer;
301 hwdesc = &tx_ring->desc_head[tx_ring->producer];
302
303 req = (struct qlcnic_nic_req *)hwdesc;
304 memset(req, 0, sizeof(struct qlcnic_nic_req));
305 req->qhdr = cpu_to_le64(QLCNIC_REQUEST << 23);
306
307 word = QLCNIC_MAC_EVENT | ((u64)(adapter->portnum) << 16);
308 req->req_hdr = cpu_to_le64(word);
309
310 mac_req = (struct qlcnic_mac_req *)&(req->words[0]);
311 mac_req->op = vlan_id ? QLCNIC_MAC_VLAN_ADD : QLCNIC_MAC_ADD;
312 memcpy(mac_req->mac_addr, uaddr, ETH_ALEN);
313
314 vlan_req = (struct qlcnic_vlan_req *)&req->words[1];
315 vlan_req->vlan_id = cpu_to_le16(vlan_id);
316
317 tx_ring->producer = get_next_index(producer, tx_ring->num_desc);
318 smp_mb();
319 }
320
321 static void qlcnic_send_filter(struct qlcnic_adapter *adapter,
322 struct cmd_desc_type0 *first_desc,
323 struct sk_buff *skb)
324 {
325 struct qlcnic_filter *fil, *tmp_fil;
326 struct hlist_node *n;
327 struct hlist_head *head;
328 struct net_device *netdev = adapter->netdev;
329 struct ethhdr *phdr = (struct ethhdr *)(skb->data);
330 u64 src_addr = 0;
331 u16 vlan_id = 0;
332 u8 hindex;
333
334 if (ether_addr_equal(phdr->h_source, adapter->mac_addr))
335 return;
336
337 if (adapter->fhash.fnum >= adapter->fhash.fmax) {
338 adapter->stats.mac_filter_limit_overrun++;
339 netdev_info(netdev, "Can not add more than %d mac addresses\n",
340 adapter->fhash.fmax);
341 return;
342 }
343
344 memcpy(&src_addr, phdr->h_source, ETH_ALEN);
345 hindex = qlcnic_mac_hash(src_addr) & (adapter->fhash.fbucket_size - 1);
346 head = &(adapter->fhash.fhead[hindex]);
347
348 hlist_for_each_entry_safe(tmp_fil, n, head, fnode) {
349 if (!memcmp(tmp_fil->faddr, &src_addr, ETH_ALEN) &&
350 tmp_fil->vlan_id == vlan_id) {
351 if (jiffies > (QLCNIC_READD_AGE * HZ + tmp_fil->ftime))
352 qlcnic_change_filter(adapter, &src_addr,
353 vlan_id);
354 tmp_fil->ftime = jiffies;
355 return;
356 }
357 }
358
359 fil = kzalloc(sizeof(struct qlcnic_filter), GFP_ATOMIC);
360 if (!fil)
361 return;
362
363 qlcnic_change_filter(adapter, &src_addr, vlan_id);
364 fil->ftime = jiffies;
365 fil->vlan_id = vlan_id;
366 memcpy(fil->faddr, &src_addr, ETH_ALEN);
367 spin_lock(&adapter->mac_learn_lock);
368 hlist_add_head(&(fil->fnode), head);
369 adapter->fhash.fnum++;
370 spin_unlock(&adapter->mac_learn_lock);
371 }
372
373 static int qlcnic_tx_pkt(struct qlcnic_adapter *adapter,
374 struct cmd_desc_type0 *first_desc, struct sk_buff *skb,
375 struct qlcnic_host_tx_ring *tx_ring)
376 {
377 u8 l4proto, opcode = 0, hdr_len = 0;
378 u16 flags = 0, vlan_tci = 0;
379 int copied, offset, copy_len, size;
380 struct cmd_desc_type0 *hwdesc;
381 struct vlan_ethhdr *vh;
382 u16 protocol = ntohs(skb->protocol);
383 u32 producer = tx_ring->producer;
384
385 if (protocol == ETH_P_8021Q) {
386 vh = (struct vlan_ethhdr *)skb->data;
387 flags = FLAGS_VLAN_TAGGED;
388 vlan_tci = ntohs(vh->h_vlan_TCI);
389 protocol = ntohs(vh->h_vlan_encapsulated_proto);
390 } else if (vlan_tx_tag_present(skb)) {
391 flags = FLAGS_VLAN_OOB;
392 vlan_tci = vlan_tx_tag_get(skb);
393 }
394 if (unlikely(adapter->tx_pvid)) {
395 if (vlan_tci && !(adapter->flags & QLCNIC_TAGGING_ENABLED))
396 return -EIO;
397 if (vlan_tci && (adapter->flags & QLCNIC_TAGGING_ENABLED))
398 goto set_flags;
399
400 flags = FLAGS_VLAN_OOB;
401 vlan_tci = adapter->tx_pvid;
402 }
403 set_flags:
404 qlcnic_set_tx_vlan_tci(first_desc, vlan_tci);
405 qlcnic_set_tx_flags_opcode(first_desc, flags, opcode);
406
407 if (*(skb->data) & BIT_0) {
408 flags |= BIT_0;
409 memcpy(&first_desc->eth_addr, skb->data, ETH_ALEN);
410 }
411 opcode = TX_ETHER_PKT;
412 if (skb_is_gso(skb)) {
413 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
414 first_desc->mss = cpu_to_le16(skb_shinfo(skb)->gso_size);
415 first_desc->total_hdr_length = hdr_len;
416 opcode = (protocol == ETH_P_IPV6) ? TX_TCP_LSO6 : TX_TCP_LSO;
417
418 /* For LSO, we need to copy the MAC/IP/TCP headers into
419 * the descriptor ring */
420 copied = 0;
421 offset = 2;
422
423 if (flags & FLAGS_VLAN_OOB) {
424 first_desc->total_hdr_length += VLAN_HLEN;
425 first_desc->tcp_hdr_offset = VLAN_HLEN;
426 first_desc->ip_hdr_offset = VLAN_HLEN;
427
428 /* Only in case of TSO on vlan device */
429 flags |= FLAGS_VLAN_TAGGED;
430
431 /* Create a TSO vlan header template for firmware */
432 hwdesc = &tx_ring->desc_head[producer];
433 tx_ring->cmd_buf_arr[producer].skb = NULL;
434
435 copy_len = min((int)sizeof(struct cmd_desc_type0) -
436 offset, hdr_len + VLAN_HLEN);
437
438 vh = (struct vlan_ethhdr *)((char *) hwdesc + 2);
439 skb_copy_from_linear_data(skb, vh, 12);
440 vh->h_vlan_proto = htons(ETH_P_8021Q);
441 vh->h_vlan_TCI = htons(vlan_tci);
442
443 skb_copy_from_linear_data_offset(skb, 12,
444 (char *)vh + 16,
445 copy_len - 16);
446 copied = copy_len - VLAN_HLEN;
447 offset = 0;
448 producer = get_next_index(producer, tx_ring->num_desc);
449 }
450
451 while (copied < hdr_len) {
452 size = (int)sizeof(struct cmd_desc_type0) - offset;
453 copy_len = min(size, (hdr_len - copied));
454 hwdesc = &tx_ring->desc_head[producer];
455 tx_ring->cmd_buf_arr[producer].skb = NULL;
456 skb_copy_from_linear_data_offset(skb, copied,
457 (char *)hwdesc +
458 offset, copy_len);
459 copied += copy_len;
460 offset = 0;
461 producer = get_next_index(producer, tx_ring->num_desc);
462 }
463
464 tx_ring->producer = producer;
465 smp_mb();
466 adapter->stats.lso_frames++;
467
468 } else if (skb->ip_summed == CHECKSUM_PARTIAL) {
469 if (protocol == ETH_P_IP) {
470 l4proto = ip_hdr(skb)->protocol;
471
472 if (l4proto == IPPROTO_TCP)
473 opcode = TX_TCP_PKT;
474 else if (l4proto == IPPROTO_UDP)
475 opcode = TX_UDP_PKT;
476 } else if (protocol == ETH_P_IPV6) {
477 l4proto = ipv6_hdr(skb)->nexthdr;
478
479 if (l4proto == IPPROTO_TCP)
480 opcode = TX_TCPV6_PKT;
481 else if (l4proto == IPPROTO_UDP)
482 opcode = TX_UDPV6_PKT;
483 }
484 }
485 first_desc->tcp_hdr_offset += skb_transport_offset(skb);
486 first_desc->ip_hdr_offset += skb_network_offset(skb);
487 qlcnic_set_tx_flags_opcode(first_desc, flags, opcode);
488
489 return 0;
490 }
491
492 static int qlcnic_map_tx_skb(struct pci_dev *pdev, struct sk_buff *skb,
493 struct qlcnic_cmd_buffer *pbuf)
494 {
495 struct qlcnic_skb_frag *nf;
496 struct skb_frag_struct *frag;
497 int i, nr_frags;
498 dma_addr_t map;
499
500 nr_frags = skb_shinfo(skb)->nr_frags;
501 nf = &pbuf->frag_array[0];
502
503 map = pci_map_single(pdev, skb->data, skb_headlen(skb),
504 PCI_DMA_TODEVICE);
505 if (pci_dma_mapping_error(pdev, map))
506 goto out_err;
507
508 nf->dma = map;
509 nf->length = skb_headlen(skb);
510
511 for (i = 0; i < nr_frags; i++) {
512 frag = &skb_shinfo(skb)->frags[i];
513 nf = &pbuf->frag_array[i+1];
514 map = skb_frag_dma_map(&pdev->dev, frag, 0, skb_frag_size(frag),
515 DMA_TO_DEVICE);
516 if (dma_mapping_error(&pdev->dev, map))
517 goto unwind;
518
519 nf->dma = map;
520 nf->length = skb_frag_size(frag);
521 }
522
523 return 0;
524
525 unwind:
526 while (--i >= 0) {
527 nf = &pbuf->frag_array[i+1];
528 pci_unmap_page(pdev, nf->dma, nf->length, PCI_DMA_TODEVICE);
529 }
530
531 nf = &pbuf->frag_array[0];
532 pci_unmap_single(pdev, nf->dma, skb_headlen(skb), PCI_DMA_TODEVICE);
533
534 out_err:
535 return -ENOMEM;
536 }
537
538 static void qlcnic_unmap_buffers(struct pci_dev *pdev, struct sk_buff *skb,
539 struct qlcnic_cmd_buffer *pbuf)
540 {
541 struct qlcnic_skb_frag *nf = &pbuf->frag_array[0];
542 int i, nr_frags = skb_shinfo(skb)->nr_frags;
543
544 for (i = 0; i < nr_frags; i++) {
545 nf = &pbuf->frag_array[i+1];
546 pci_unmap_page(pdev, nf->dma, nf->length, PCI_DMA_TODEVICE);
547 }
548
549 nf = &pbuf->frag_array[0];
550 pci_unmap_single(pdev, nf->dma, skb_headlen(skb), PCI_DMA_TODEVICE);
551 pbuf->skb = NULL;
552 }
553
554 static inline void qlcnic_clear_cmddesc(u64 *desc)
555 {
556 desc[0] = 0ULL;
557 desc[2] = 0ULL;
558 desc[7] = 0ULL;
559 }
560
561 netdev_tx_t qlcnic_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
562 {
563 struct qlcnic_adapter *adapter = netdev_priv(netdev);
564 struct qlcnic_host_tx_ring *tx_ring;
565 struct qlcnic_cmd_buffer *pbuf;
566 struct qlcnic_skb_frag *buffrag;
567 struct cmd_desc_type0 *hwdesc, *first_desc;
568 struct pci_dev *pdev;
569 struct ethhdr *phdr;
570 int i, k, frag_count, delta = 0;
571 u32 producer, num_txd;
572
573 if (!test_bit(__QLCNIC_DEV_UP, &adapter->state)) {
574 netif_tx_stop_all_queues(netdev);
575 return NETDEV_TX_BUSY;
576 }
577
578 if (adapter->flags & QLCNIC_MACSPOOF) {
579 phdr = (struct ethhdr *)skb->data;
580 if (!ether_addr_equal(phdr->h_source, adapter->mac_addr))
581 goto drop_packet;
582 }
583
584 tx_ring = &adapter->tx_ring[skb_get_queue_mapping(skb)];
585 num_txd = tx_ring->num_desc;
586
587 frag_count = skb_shinfo(skb)->nr_frags + 1;
588
589 /* 14 frags supported for normal packet and
590 * 32 frags supported for TSO packet
591 */
592 if (!skb_is_gso(skb) && frag_count > QLCNIC_MAX_FRAGS_PER_TX) {
593 for (i = 0; i < (frag_count - QLCNIC_MAX_FRAGS_PER_TX); i++)
594 delta += skb_frag_size(&skb_shinfo(skb)->frags[i]);
595
596 if (!__pskb_pull_tail(skb, delta))
597 goto drop_packet;
598
599 frag_count = 1 + skb_shinfo(skb)->nr_frags;
600 }
601
602 if (unlikely(qlcnic_tx_avail(tx_ring) <= TX_STOP_THRESH)) {
603 netif_tx_stop_queue(tx_ring->txq);
604 if (qlcnic_tx_avail(tx_ring) > TX_STOP_THRESH) {
605 netif_tx_start_queue(tx_ring->txq);
606 } else {
607 tx_ring->tx_stats.xmit_off++;
608 return NETDEV_TX_BUSY;
609 }
610 }
611
612 producer = tx_ring->producer;
613 pbuf = &tx_ring->cmd_buf_arr[producer];
614 pdev = adapter->pdev;
615 first_desc = &tx_ring->desc_head[producer];
616 hwdesc = &tx_ring->desc_head[producer];
617 qlcnic_clear_cmddesc((u64 *)hwdesc);
618
619 if (qlcnic_map_tx_skb(pdev, skb, pbuf)) {
620 adapter->stats.tx_dma_map_error++;
621 goto drop_packet;
622 }
623
624 pbuf->skb = skb;
625 pbuf->frag_count = frag_count;
626
627 qlcnic_set_tx_frags_len(first_desc, frag_count, skb->len);
628 qlcnic_set_tx_port(first_desc, adapter->portnum);
629
630 for (i = 0; i < frag_count; i++) {
631 k = i % 4;
632
633 if ((k == 0) && (i > 0)) {
634 /* move to next desc.*/
635 producer = get_next_index(producer, num_txd);
636 hwdesc = &tx_ring->desc_head[producer];
637 qlcnic_clear_cmddesc((u64 *)hwdesc);
638 tx_ring->cmd_buf_arr[producer].skb = NULL;
639 }
640
641 buffrag = &pbuf->frag_array[i];
642 hwdesc->buffer_length[k] = cpu_to_le16(buffrag->length);
643 switch (k) {
644 case 0:
645 hwdesc->addr_buffer1 = cpu_to_le64(buffrag->dma);
646 break;
647 case 1:
648 hwdesc->addr_buffer2 = cpu_to_le64(buffrag->dma);
649 break;
650 case 2:
651 hwdesc->addr_buffer3 = cpu_to_le64(buffrag->dma);
652 break;
653 case 3:
654 hwdesc->addr_buffer4 = cpu_to_le64(buffrag->dma);
655 break;
656 }
657 }
658
659 tx_ring->producer = get_next_index(producer, num_txd);
660 smp_mb();
661
662 if (unlikely(qlcnic_tx_pkt(adapter, first_desc, skb, tx_ring)))
663 goto unwind_buff;
664
665 if (adapter->drv_mac_learn)
666 qlcnic_send_filter(adapter, first_desc, skb);
667
668 tx_ring->tx_stats.tx_bytes += skb->len;
669 tx_ring->tx_stats.xmit_called++;
670
671 qlcnic_update_cmd_producer(tx_ring);
672
673 return NETDEV_TX_OK;
674
675 unwind_buff:
676 qlcnic_unmap_buffers(pdev, skb, pbuf);
677 drop_packet:
678 adapter->stats.txdropped++;
679 dev_kfree_skb_any(skb);
680 return NETDEV_TX_OK;
681 }
682
683 void qlcnic_advert_link_change(struct qlcnic_adapter *adapter, int linkup)
684 {
685 struct net_device *netdev = adapter->netdev;
686
687 if (adapter->ahw->linkup && !linkup) {
688 netdev_info(netdev, "NIC Link is down\n");
689 adapter->ahw->linkup = 0;
690 netif_carrier_off(netdev);
691 } else if (!adapter->ahw->linkup && linkup) {
692 /* Do not advertise Link up if the port is in loopback mode */
693 if (qlcnic_83xx_check(adapter) && adapter->ahw->lb_mode)
694 return;
695
696 netdev_info(netdev, "NIC Link is up\n");
697 adapter->ahw->linkup = 1;
698 netif_carrier_on(netdev);
699 }
700 }
701
702 static int qlcnic_alloc_rx_skb(struct qlcnic_adapter *adapter,
703 struct qlcnic_host_rds_ring *rds_ring,
704 struct qlcnic_rx_buffer *buffer)
705 {
706 struct sk_buff *skb;
707 dma_addr_t dma;
708 struct pci_dev *pdev = adapter->pdev;
709
710 skb = netdev_alloc_skb(adapter->netdev, rds_ring->skb_size);
711 if (!skb) {
712 adapter->stats.skb_alloc_failure++;
713 return -ENOMEM;
714 }
715
716 skb_reserve(skb, NET_IP_ALIGN);
717 dma = pci_map_single(pdev, skb->data,
718 rds_ring->dma_size, PCI_DMA_FROMDEVICE);
719
720 if (pci_dma_mapping_error(pdev, dma)) {
721 adapter->stats.rx_dma_map_error++;
722 dev_kfree_skb_any(skb);
723 return -ENOMEM;
724 }
725
726 buffer->skb = skb;
727 buffer->dma = dma;
728
729 return 0;
730 }
731
732 static void qlcnic_post_rx_buffers_nodb(struct qlcnic_adapter *adapter,
733 struct qlcnic_host_rds_ring *rds_ring,
734 u8 ring_id)
735 {
736 struct rcv_desc *pdesc;
737 struct qlcnic_rx_buffer *buffer;
738 int count = 0;
739 uint32_t producer, handle;
740 struct list_head *head;
741
742 if (!spin_trylock(&rds_ring->lock))
743 return;
744
745 producer = rds_ring->producer;
746 head = &rds_ring->free_list;
747 while (!list_empty(head)) {
748 buffer = list_entry(head->next, struct qlcnic_rx_buffer, list);
749
750 if (!buffer->skb) {
751 if (qlcnic_alloc_rx_skb(adapter, rds_ring, buffer))
752 break;
753 }
754 count++;
755 list_del(&buffer->list);
756
757 /* make a rcv descriptor */
758 pdesc = &rds_ring->desc_head[producer];
759 handle = qlcnic_get_ref_handle(adapter,
760 buffer->ref_handle, ring_id);
761 pdesc->reference_handle = cpu_to_le16(handle);
762 pdesc->buffer_length = cpu_to_le32(rds_ring->dma_size);
763 pdesc->addr_buffer = cpu_to_le64(buffer->dma);
764 producer = get_next_index(producer, rds_ring->num_desc);
765 }
766 if (count) {
767 rds_ring->producer = producer;
768 writel((producer - 1) & (rds_ring->num_desc - 1),
769 rds_ring->crb_rcv_producer);
770 }
771 spin_unlock(&rds_ring->lock);
772 }
773
774 static int qlcnic_process_cmd_ring(struct qlcnic_adapter *adapter,
775 struct qlcnic_host_tx_ring *tx_ring,
776 int budget)
777 {
778 u32 sw_consumer, hw_consumer;
779 int i, done, count = 0;
780 struct qlcnic_cmd_buffer *buffer;
781 struct pci_dev *pdev = adapter->pdev;
782 struct net_device *netdev = adapter->netdev;
783 struct qlcnic_skb_frag *frag;
784
785 if (!spin_trylock(&adapter->tx_clean_lock))
786 return 1;
787
788 sw_consumer = tx_ring->sw_consumer;
789 hw_consumer = le32_to_cpu(*(tx_ring->hw_consumer));
790
791 while (sw_consumer != hw_consumer) {
792 buffer = &tx_ring->cmd_buf_arr[sw_consumer];
793 if (buffer->skb) {
794 frag = &buffer->frag_array[0];
795 pci_unmap_single(pdev, frag->dma, frag->length,
796 PCI_DMA_TODEVICE);
797 frag->dma = 0ULL;
798 for (i = 1; i < buffer->frag_count; i++) {
799 frag++;
800 pci_unmap_page(pdev, frag->dma, frag->length,
801 PCI_DMA_TODEVICE);
802 frag->dma = 0ULL;
803 }
804 tx_ring->tx_stats.xmit_finished++;
805 dev_kfree_skb_any(buffer->skb);
806 buffer->skb = NULL;
807 }
808
809 sw_consumer = get_next_index(sw_consumer, tx_ring->num_desc);
810 if (++count >= budget)
811 break;
812 }
813
814 if (count && netif_running(netdev)) {
815 tx_ring->sw_consumer = sw_consumer;
816 smp_mb();
817 if (netif_tx_queue_stopped(tx_ring->txq) &&
818 netif_carrier_ok(netdev)) {
819 if (qlcnic_tx_avail(tx_ring) > TX_STOP_THRESH) {
820 netif_tx_wake_queue(tx_ring->txq);
821 tx_ring->tx_stats.xmit_on++;
822 }
823 }
824 adapter->tx_timeo_cnt = 0;
825 }
826 /*
827 * If everything is freed up to consumer then check if the ring is full
828 * If the ring is full then check if more needs to be freed and
829 * schedule the call back again.
830 *
831 * This happens when there are 2 CPUs. One could be freeing and the
832 * other filling it. If the ring is full when we get out of here and
833 * the card has already interrupted the host then the host can miss the
834 * interrupt.
835 *
836 * There is still a possible race condition and the host could miss an
837 * interrupt. The card has to take care of this.
838 */
839 hw_consumer = le32_to_cpu(*(tx_ring->hw_consumer));
840 done = (sw_consumer == hw_consumer);
841 spin_unlock(&adapter->tx_clean_lock);
842
843 return done;
844 }
845
846 static int qlcnic_poll(struct napi_struct *napi, int budget)
847 {
848 int tx_complete, work_done;
849 struct qlcnic_host_sds_ring *sds_ring;
850 struct qlcnic_adapter *adapter;
851 struct qlcnic_host_tx_ring *tx_ring;
852
853 sds_ring = container_of(napi, struct qlcnic_host_sds_ring, napi);
854 adapter = sds_ring->adapter;
855 tx_ring = sds_ring->tx_ring;
856
857 tx_complete = qlcnic_process_cmd_ring(adapter, tx_ring,
858 budget);
859 work_done = qlcnic_process_rcv_ring(sds_ring, budget);
860 if ((work_done < budget) && tx_complete) {
861 napi_complete(&sds_ring->napi);
862 if (test_bit(__QLCNIC_DEV_UP, &adapter->state)) {
863 qlcnic_enable_int(sds_ring);
864 qlcnic_enable_tx_intr(adapter, tx_ring);
865 }
866 }
867
868 return work_done;
869 }
870
871 static int qlcnic_tx_poll(struct napi_struct *napi, int budget)
872 {
873 struct qlcnic_host_tx_ring *tx_ring;
874 struct qlcnic_adapter *adapter;
875 int work_done;
876
877 tx_ring = container_of(napi, struct qlcnic_host_tx_ring, napi);
878 adapter = tx_ring->adapter;
879
880 work_done = qlcnic_process_cmd_ring(adapter, tx_ring, budget);
881 if (work_done) {
882 napi_complete(&tx_ring->napi);
883 if (test_bit(__QLCNIC_DEV_UP, &adapter->state))
884 qlcnic_enable_tx_intr(adapter, tx_ring);
885 }
886
887 return work_done;
888 }
889
890 static int qlcnic_rx_poll(struct napi_struct *napi, int budget)
891 {
892 struct qlcnic_host_sds_ring *sds_ring;
893 struct qlcnic_adapter *adapter;
894 int work_done;
895
896 sds_ring = container_of(napi, struct qlcnic_host_sds_ring, napi);
897 adapter = sds_ring->adapter;
898
899 work_done = qlcnic_process_rcv_ring(sds_ring, budget);
900
901 if (work_done < budget) {
902 napi_complete(&sds_ring->napi);
903 if (test_bit(__QLCNIC_DEV_UP, &adapter->state))
904 qlcnic_enable_int(sds_ring);
905 }
906
907 return work_done;
908 }
909
910 static void qlcnic_handle_linkevent(struct qlcnic_adapter *adapter,
911 struct qlcnic_fw_msg *msg)
912 {
913 u32 cable_OUI;
914 u16 cable_len, link_speed;
915 u8 link_status, module, duplex, autoneg, lb_status = 0;
916 struct net_device *netdev = adapter->netdev;
917
918 adapter->ahw->has_link_events = 1;
919
920 cable_OUI = msg->body[1] & 0xffffffff;
921 cable_len = (msg->body[1] >> 32) & 0xffff;
922 link_speed = (msg->body[1] >> 48) & 0xffff;
923
924 link_status = msg->body[2] & 0xff;
925 duplex = (msg->body[2] >> 16) & 0xff;
926 autoneg = (msg->body[2] >> 24) & 0xff;
927 lb_status = (msg->body[2] >> 32) & 0x3;
928
929 module = (msg->body[2] >> 8) & 0xff;
930 if (module == LINKEVENT_MODULE_TWINAX_UNSUPPORTED_CABLE)
931 dev_info(&netdev->dev,
932 "unsupported cable: OUI 0x%x, length %d\n",
933 cable_OUI, cable_len);
934 else if (module == LINKEVENT_MODULE_TWINAX_UNSUPPORTED_CABLELEN)
935 dev_info(&netdev->dev, "unsupported cable length %d\n",
936 cable_len);
937
938 if (!link_status && (lb_status == QLCNIC_ILB_MODE ||
939 lb_status == QLCNIC_ELB_MODE))
940 adapter->ahw->loopback_state |= QLCNIC_LINKEVENT;
941
942 qlcnic_advert_link_change(adapter, link_status);
943
944 if (duplex == LINKEVENT_FULL_DUPLEX)
945 adapter->ahw->link_duplex = DUPLEX_FULL;
946 else
947 adapter->ahw->link_duplex = DUPLEX_HALF;
948
949 adapter->ahw->module_type = module;
950 adapter->ahw->link_autoneg = autoneg;
951
952 if (link_status) {
953 adapter->ahw->link_speed = link_speed;
954 } else {
955 adapter->ahw->link_speed = SPEED_UNKNOWN;
956 adapter->ahw->link_duplex = DUPLEX_UNKNOWN;
957 }
958 }
959
960 static void qlcnic_handle_fw_message(int desc_cnt, int index,
961 struct qlcnic_host_sds_ring *sds_ring)
962 {
963 struct qlcnic_fw_msg msg;
964 struct status_desc *desc;
965 struct qlcnic_adapter *adapter;
966 struct device *dev;
967 int i = 0, opcode, ret;
968
969 while (desc_cnt > 0 && i < 8) {
970 desc = &sds_ring->desc_head[index];
971 msg.words[i++] = le64_to_cpu(desc->status_desc_data[0]);
972 msg.words[i++] = le64_to_cpu(desc->status_desc_data[1]);
973
974 index = get_next_index(index, sds_ring->num_desc);
975 desc_cnt--;
976 }
977
978 adapter = sds_ring->adapter;
979 dev = &adapter->pdev->dev;
980 opcode = qlcnic_get_nic_msg_opcode(msg.body[0]);
981
982 switch (opcode) {
983 case QLCNIC_C2H_OPCODE_GET_LINKEVENT_RESPONSE:
984 qlcnic_handle_linkevent(adapter, &msg);
985 break;
986 case QLCNIC_C2H_OPCODE_CONFIG_LOOPBACK:
987 ret = (u32)(msg.body[1]);
988 switch (ret) {
989 case 0:
990 adapter->ahw->loopback_state |= QLCNIC_LB_RESPONSE;
991 break;
992 case 1:
993 dev_info(dev, "loopback already in progress\n");
994 adapter->ahw->diag_cnt = -EINPROGRESS;
995 break;
996 case 2:
997 dev_info(dev, "loopback cable is not connected\n");
998 adapter->ahw->diag_cnt = -ENODEV;
999 break;
1000 default:
1001 dev_info(dev,
1002 "loopback configure request failed, err %x\n",
1003 ret);
1004 adapter->ahw->diag_cnt = -EIO;
1005 break;
1006 }
1007 break;
1008 case QLCNIC_C2H_OPCODE_GET_DCB_AEN:
1009 qlcnic_dcb_aen_handler(adapter->dcb, (void *)&msg);
1010 break;
1011 default:
1012 break;
1013 }
1014 }
1015
1016 struct sk_buff *qlcnic_process_rxbuf(struct qlcnic_adapter *adapter,
1017 struct qlcnic_host_rds_ring *ring,
1018 u16 index, u16 cksum)
1019 {
1020 struct qlcnic_rx_buffer *buffer;
1021 struct sk_buff *skb;
1022
1023 buffer = &ring->rx_buf_arr[index];
1024 if (unlikely(buffer->skb == NULL)) {
1025 WARN_ON(1);
1026 return NULL;
1027 }
1028
1029 pci_unmap_single(adapter->pdev, buffer->dma, ring->dma_size,
1030 PCI_DMA_FROMDEVICE);
1031
1032 skb = buffer->skb;
1033 if (likely((adapter->netdev->features & NETIF_F_RXCSUM) &&
1034 (cksum == STATUS_CKSUM_OK || cksum == STATUS_CKSUM_LOOP))) {
1035 adapter->stats.csummed++;
1036 skb->ip_summed = CHECKSUM_UNNECESSARY;
1037 } else {
1038 skb_checksum_none_assert(skb);
1039 }
1040
1041
1042 buffer->skb = NULL;
1043
1044 return skb;
1045 }
1046
1047 static inline int qlcnic_check_rx_tagging(struct qlcnic_adapter *adapter,
1048 struct sk_buff *skb, u16 *vlan_tag)
1049 {
1050 struct ethhdr *eth_hdr;
1051
1052 if (!__vlan_get_tag(skb, vlan_tag)) {
1053 eth_hdr = (struct ethhdr *)skb->data;
1054 memmove(skb->data + VLAN_HLEN, eth_hdr, ETH_ALEN * 2);
1055 skb_pull(skb, VLAN_HLEN);
1056 }
1057 if (!adapter->rx_pvid)
1058 return 0;
1059
1060 if (*vlan_tag == adapter->rx_pvid) {
1061 /* Outer vlan tag. Packet should follow non-vlan path */
1062 *vlan_tag = 0xffff;
1063 return 0;
1064 }
1065 if (adapter->flags & QLCNIC_TAGGING_ENABLED)
1066 return 0;
1067
1068 return -EINVAL;
1069 }
1070
1071 static struct qlcnic_rx_buffer *
1072 qlcnic_process_rcv(struct qlcnic_adapter *adapter,
1073 struct qlcnic_host_sds_ring *sds_ring, int ring,
1074 u64 sts_data0)
1075 {
1076 struct net_device *netdev = adapter->netdev;
1077 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1078 struct qlcnic_rx_buffer *buffer;
1079 struct sk_buff *skb;
1080 struct qlcnic_host_rds_ring *rds_ring;
1081 int index, length, cksum, pkt_offset, is_lb_pkt;
1082 u16 vid = 0xffff, t_vid;
1083
1084 if (unlikely(ring >= adapter->max_rds_rings))
1085 return NULL;
1086
1087 rds_ring = &recv_ctx->rds_rings[ring];
1088
1089 index = qlcnic_get_sts_refhandle(sts_data0);
1090 if (unlikely(index >= rds_ring->num_desc))
1091 return NULL;
1092
1093 buffer = &rds_ring->rx_buf_arr[index];
1094 length = qlcnic_get_sts_totallength(sts_data0);
1095 cksum = qlcnic_get_sts_status(sts_data0);
1096 pkt_offset = qlcnic_get_sts_pkt_offset(sts_data0);
1097
1098 skb = qlcnic_process_rxbuf(adapter, rds_ring, index, cksum);
1099 if (!skb)
1100 return buffer;
1101
1102 if (adapter->drv_mac_learn &&
1103 (adapter->flags & QLCNIC_ESWITCH_ENABLED)) {
1104 t_vid = 0;
1105 is_lb_pkt = qlcnic_82xx_is_lb_pkt(sts_data0);
1106 qlcnic_add_lb_filter(adapter, skb, is_lb_pkt, t_vid);
1107 }
1108
1109 if (length > rds_ring->skb_size)
1110 skb_put(skb, rds_ring->skb_size);
1111 else
1112 skb_put(skb, length);
1113
1114 if (pkt_offset)
1115 skb_pull(skb, pkt_offset);
1116
1117 if (unlikely(qlcnic_check_rx_tagging(adapter, skb, &vid))) {
1118 adapter->stats.rxdropped++;
1119 dev_kfree_skb(skb);
1120 return buffer;
1121 }
1122
1123 skb->protocol = eth_type_trans(skb, netdev);
1124
1125 if (vid != 0xffff)
1126 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid);
1127
1128 napi_gro_receive(&sds_ring->napi, skb);
1129
1130 adapter->stats.rx_pkts++;
1131 adapter->stats.rxbytes += length;
1132
1133 return buffer;
1134 }
1135
1136 #define QLC_TCP_HDR_SIZE 20
1137 #define QLC_TCP_TS_OPTION_SIZE 12
1138 #define QLC_TCP_TS_HDR_SIZE (QLC_TCP_HDR_SIZE + QLC_TCP_TS_OPTION_SIZE)
1139
1140 static struct qlcnic_rx_buffer *
1141 qlcnic_process_lro(struct qlcnic_adapter *adapter,
1142 int ring, u64 sts_data0, u64 sts_data1)
1143 {
1144 struct net_device *netdev = adapter->netdev;
1145 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1146 struct qlcnic_rx_buffer *buffer;
1147 struct sk_buff *skb;
1148 struct qlcnic_host_rds_ring *rds_ring;
1149 struct iphdr *iph;
1150 struct ipv6hdr *ipv6h;
1151 struct tcphdr *th;
1152 bool push, timestamp;
1153 int index, l2_hdr_offset, l4_hdr_offset, is_lb_pkt;
1154 u16 lro_length, length, data_offset, t_vid, vid = 0xffff;
1155 u32 seq_number;
1156
1157 if (unlikely(ring > adapter->max_rds_rings))
1158 return NULL;
1159
1160 rds_ring = &recv_ctx->rds_rings[ring];
1161
1162 index = qlcnic_get_lro_sts_refhandle(sts_data0);
1163 if (unlikely(index > rds_ring->num_desc))
1164 return NULL;
1165
1166 buffer = &rds_ring->rx_buf_arr[index];
1167
1168 timestamp = qlcnic_get_lro_sts_timestamp(sts_data0);
1169 lro_length = qlcnic_get_lro_sts_length(sts_data0);
1170 l2_hdr_offset = qlcnic_get_lro_sts_l2_hdr_offset(sts_data0);
1171 l4_hdr_offset = qlcnic_get_lro_sts_l4_hdr_offset(sts_data0);
1172 push = qlcnic_get_lro_sts_push_flag(sts_data0);
1173 seq_number = qlcnic_get_lro_sts_seq_number(sts_data1);
1174
1175 skb = qlcnic_process_rxbuf(adapter, rds_ring, index, STATUS_CKSUM_OK);
1176 if (!skb)
1177 return buffer;
1178
1179 if (adapter->drv_mac_learn &&
1180 (adapter->flags & QLCNIC_ESWITCH_ENABLED)) {
1181 t_vid = 0;
1182 is_lb_pkt = qlcnic_82xx_is_lb_pkt(sts_data0);
1183 qlcnic_add_lb_filter(adapter, skb, is_lb_pkt, t_vid);
1184 }
1185
1186 if (timestamp)
1187 data_offset = l4_hdr_offset + QLC_TCP_TS_HDR_SIZE;
1188 else
1189 data_offset = l4_hdr_offset + QLC_TCP_HDR_SIZE;
1190
1191 skb_put(skb, lro_length + data_offset);
1192 skb_pull(skb, l2_hdr_offset);
1193
1194 if (unlikely(qlcnic_check_rx_tagging(adapter, skb, &vid))) {
1195 adapter->stats.rxdropped++;
1196 dev_kfree_skb(skb);
1197 return buffer;
1198 }
1199
1200 skb->protocol = eth_type_trans(skb, netdev);
1201
1202 if (ntohs(skb->protocol) == ETH_P_IPV6) {
1203 ipv6h = (struct ipv6hdr *)skb->data;
1204 th = (struct tcphdr *)(skb->data + sizeof(struct ipv6hdr));
1205 length = (th->doff << 2) + lro_length;
1206 ipv6h->payload_len = htons(length);
1207 } else {
1208 iph = (struct iphdr *)skb->data;
1209 th = (struct tcphdr *)(skb->data + (iph->ihl << 2));
1210 length = (iph->ihl << 2) + (th->doff << 2) + lro_length;
1211 csum_replace2(&iph->check, iph->tot_len, htons(length));
1212 iph->tot_len = htons(length);
1213 }
1214
1215 th->psh = push;
1216 th->seq = htonl(seq_number);
1217 length = skb->len;
1218
1219 if (adapter->flags & QLCNIC_FW_LRO_MSS_CAP) {
1220 skb_shinfo(skb)->gso_size = qlcnic_get_lro_sts_mss(sts_data1);
1221 if (skb->protocol == htons(ETH_P_IPV6))
1222 skb_shinfo(skb)->gso_type = SKB_GSO_TCPV6;
1223 else
1224 skb_shinfo(skb)->gso_type = SKB_GSO_TCPV4;
1225 }
1226
1227 if (vid != 0xffff)
1228 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid);
1229 netif_receive_skb(skb);
1230
1231 adapter->stats.lro_pkts++;
1232 adapter->stats.lrobytes += length;
1233
1234 return buffer;
1235 }
1236
1237 int qlcnic_process_rcv_ring(struct qlcnic_host_sds_ring *sds_ring, int max)
1238 {
1239 struct qlcnic_host_rds_ring *rds_ring;
1240 struct qlcnic_adapter *adapter = sds_ring->adapter;
1241 struct list_head *cur;
1242 struct status_desc *desc;
1243 struct qlcnic_rx_buffer *rxbuf;
1244 int opcode, desc_cnt, count = 0;
1245 u64 sts_data0, sts_data1;
1246 u8 ring;
1247 u32 consumer = sds_ring->consumer;
1248
1249 while (count < max) {
1250 desc = &sds_ring->desc_head[consumer];
1251 sts_data0 = le64_to_cpu(desc->status_desc_data[0]);
1252
1253 if (!(sts_data0 & STATUS_OWNER_HOST))
1254 break;
1255
1256 desc_cnt = qlcnic_get_sts_desc_cnt(sts_data0);
1257 opcode = qlcnic_get_sts_opcode(sts_data0);
1258 switch (opcode) {
1259 case QLCNIC_RXPKT_DESC:
1260 case QLCNIC_OLD_RXPKT_DESC:
1261 case QLCNIC_SYN_OFFLOAD:
1262 ring = qlcnic_get_sts_type(sts_data0);
1263 rxbuf = qlcnic_process_rcv(adapter, sds_ring, ring,
1264 sts_data0);
1265 break;
1266 case QLCNIC_LRO_DESC:
1267 ring = qlcnic_get_lro_sts_type(sts_data0);
1268 sts_data1 = le64_to_cpu(desc->status_desc_data[1]);
1269 rxbuf = qlcnic_process_lro(adapter, ring, sts_data0,
1270 sts_data1);
1271 break;
1272 case QLCNIC_RESPONSE_DESC:
1273 qlcnic_handle_fw_message(desc_cnt, consumer, sds_ring);
1274 default:
1275 goto skip;
1276 }
1277 WARN_ON(desc_cnt > 1);
1278
1279 if (likely(rxbuf))
1280 list_add_tail(&rxbuf->list, &sds_ring->free_list[ring]);
1281 else
1282 adapter->stats.null_rxbuf++;
1283 skip:
1284 for (; desc_cnt > 0; desc_cnt--) {
1285 desc = &sds_ring->desc_head[consumer];
1286 desc->status_desc_data[0] = QLCNIC_DESC_OWNER_FW;
1287 consumer = get_next_index(consumer, sds_ring->num_desc);
1288 }
1289 count++;
1290 }
1291
1292 for (ring = 0; ring < adapter->max_rds_rings; ring++) {
1293 rds_ring = &adapter->recv_ctx->rds_rings[ring];
1294 if (!list_empty(&sds_ring->free_list[ring])) {
1295 list_for_each(cur, &sds_ring->free_list[ring]) {
1296 rxbuf = list_entry(cur, struct qlcnic_rx_buffer,
1297 list);
1298 qlcnic_alloc_rx_skb(adapter, rds_ring, rxbuf);
1299 }
1300 spin_lock(&rds_ring->lock);
1301 list_splice_tail_init(&sds_ring->free_list[ring],
1302 &rds_ring->free_list);
1303 spin_unlock(&rds_ring->lock);
1304 }
1305
1306 qlcnic_post_rx_buffers_nodb(adapter, rds_ring, ring);
1307 }
1308
1309 if (count) {
1310 sds_ring->consumer = consumer;
1311 writel(consumer, sds_ring->crb_sts_consumer);
1312 }
1313
1314 return count;
1315 }
1316
1317 void qlcnic_post_rx_buffers(struct qlcnic_adapter *adapter,
1318 struct qlcnic_host_rds_ring *rds_ring, u8 ring_id)
1319 {
1320 struct rcv_desc *pdesc;
1321 struct qlcnic_rx_buffer *buffer;
1322 int count = 0;
1323 u32 producer, handle;
1324 struct list_head *head;
1325
1326 producer = rds_ring->producer;
1327 head = &rds_ring->free_list;
1328
1329 while (!list_empty(head)) {
1330
1331 buffer = list_entry(head->next, struct qlcnic_rx_buffer, list);
1332
1333 if (!buffer->skb) {
1334 if (qlcnic_alloc_rx_skb(adapter, rds_ring, buffer))
1335 break;
1336 }
1337
1338 count++;
1339 list_del(&buffer->list);
1340
1341 /* make a rcv descriptor */
1342 pdesc = &rds_ring->desc_head[producer];
1343 pdesc->addr_buffer = cpu_to_le64(buffer->dma);
1344 handle = qlcnic_get_ref_handle(adapter, buffer->ref_handle,
1345 ring_id);
1346 pdesc->reference_handle = cpu_to_le16(handle);
1347 pdesc->buffer_length = cpu_to_le32(rds_ring->dma_size);
1348 producer = get_next_index(producer, rds_ring->num_desc);
1349 }
1350
1351 if (count) {
1352 rds_ring->producer = producer;
1353 writel((producer-1) & (rds_ring->num_desc-1),
1354 rds_ring->crb_rcv_producer);
1355 }
1356 }
1357
1358 static void dump_skb(struct sk_buff *skb, struct qlcnic_adapter *adapter)
1359 {
1360 int i;
1361 unsigned char *data = skb->data;
1362
1363 pr_info(KERN_INFO "\n");
1364 for (i = 0; i < skb->len; i++) {
1365 QLCDB(adapter, DRV, "%02x ", data[i]);
1366 if ((i & 0x0f) == 8)
1367 pr_info(KERN_INFO "\n");
1368 }
1369 }
1370
1371 static void qlcnic_process_rcv_diag(struct qlcnic_adapter *adapter, int ring,
1372 u64 sts_data0)
1373 {
1374 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1375 struct sk_buff *skb;
1376 struct qlcnic_host_rds_ring *rds_ring;
1377 int index, length, cksum, pkt_offset;
1378
1379 if (unlikely(ring >= adapter->max_rds_rings))
1380 return;
1381
1382 rds_ring = &recv_ctx->rds_rings[ring];
1383
1384 index = qlcnic_get_sts_refhandle(sts_data0);
1385 length = qlcnic_get_sts_totallength(sts_data0);
1386 if (unlikely(index >= rds_ring->num_desc))
1387 return;
1388
1389 cksum = qlcnic_get_sts_status(sts_data0);
1390 pkt_offset = qlcnic_get_sts_pkt_offset(sts_data0);
1391
1392 skb = qlcnic_process_rxbuf(adapter, rds_ring, index, cksum);
1393 if (!skb)
1394 return;
1395
1396 if (length > rds_ring->skb_size)
1397 skb_put(skb, rds_ring->skb_size);
1398 else
1399 skb_put(skb, length);
1400
1401 if (pkt_offset)
1402 skb_pull(skb, pkt_offset);
1403
1404 if (!qlcnic_check_loopback_buff(skb->data, adapter->mac_addr))
1405 adapter->ahw->diag_cnt++;
1406 else
1407 dump_skb(skb, adapter);
1408
1409 dev_kfree_skb_any(skb);
1410 adapter->stats.rx_pkts++;
1411 adapter->stats.rxbytes += length;
1412
1413 return;
1414 }
1415
1416 void qlcnic_82xx_process_rcv_ring_diag(struct qlcnic_host_sds_ring *sds_ring)
1417 {
1418 struct qlcnic_adapter *adapter = sds_ring->adapter;
1419 struct status_desc *desc;
1420 u64 sts_data0;
1421 int ring, opcode, desc_cnt;
1422
1423 u32 consumer = sds_ring->consumer;
1424
1425 desc = &sds_ring->desc_head[consumer];
1426 sts_data0 = le64_to_cpu(desc->status_desc_data[0]);
1427
1428 if (!(sts_data0 & STATUS_OWNER_HOST))
1429 return;
1430
1431 desc_cnt = qlcnic_get_sts_desc_cnt(sts_data0);
1432 opcode = qlcnic_get_sts_opcode(sts_data0);
1433 switch (opcode) {
1434 case QLCNIC_RESPONSE_DESC:
1435 qlcnic_handle_fw_message(desc_cnt, consumer, sds_ring);
1436 break;
1437 default:
1438 ring = qlcnic_get_sts_type(sts_data0);
1439 qlcnic_process_rcv_diag(adapter, ring, sts_data0);
1440 break;
1441 }
1442
1443 for (; desc_cnt > 0; desc_cnt--) {
1444 desc = &sds_ring->desc_head[consumer];
1445 desc->status_desc_data[0] = cpu_to_le64(STATUS_OWNER_PHANTOM);
1446 consumer = get_next_index(consumer, sds_ring->num_desc);
1447 }
1448
1449 sds_ring->consumer = consumer;
1450 writel(consumer, sds_ring->crb_sts_consumer);
1451 }
1452
1453 int qlcnic_82xx_napi_add(struct qlcnic_adapter *adapter,
1454 struct net_device *netdev)
1455 {
1456 int ring;
1457 struct qlcnic_host_sds_ring *sds_ring;
1458 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1459 struct qlcnic_host_tx_ring *tx_ring;
1460
1461 if (qlcnic_alloc_sds_rings(recv_ctx, adapter->drv_sds_rings))
1462 return -ENOMEM;
1463
1464 for (ring = 0; ring < adapter->drv_sds_rings; ring++) {
1465 sds_ring = &recv_ctx->sds_rings[ring];
1466 if (qlcnic_check_multi_tx(adapter) &&
1467 !adapter->ahw->diag_test &&
1468 (adapter->drv_tx_rings > QLCNIC_SINGLE_RING)) {
1469 netif_napi_add(netdev, &sds_ring->napi, qlcnic_rx_poll,
1470 NAPI_POLL_WEIGHT);
1471 } else {
1472 if (ring == (adapter->drv_sds_rings - 1))
1473 netif_napi_add(netdev, &sds_ring->napi,
1474 qlcnic_poll,
1475 NAPI_POLL_WEIGHT);
1476 else
1477 netif_napi_add(netdev, &sds_ring->napi,
1478 qlcnic_rx_poll,
1479 NAPI_POLL_WEIGHT);
1480 }
1481 }
1482
1483 if (qlcnic_alloc_tx_rings(adapter, netdev)) {
1484 qlcnic_free_sds_rings(recv_ctx);
1485 return -ENOMEM;
1486 }
1487
1488 if (qlcnic_check_multi_tx(adapter) && !adapter->ahw->diag_test) {
1489 for (ring = 0; ring < adapter->drv_tx_rings; ring++) {
1490 tx_ring = &adapter->tx_ring[ring];
1491 netif_napi_add(netdev, &tx_ring->napi, qlcnic_tx_poll,
1492 NAPI_POLL_WEIGHT);
1493 }
1494 }
1495
1496 return 0;
1497 }
1498
1499 void qlcnic_82xx_napi_del(struct qlcnic_adapter *adapter)
1500 {
1501 int ring;
1502 struct qlcnic_host_sds_ring *sds_ring;
1503 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1504 struct qlcnic_host_tx_ring *tx_ring;
1505
1506 for (ring = 0; ring < adapter->drv_sds_rings; ring++) {
1507 sds_ring = &recv_ctx->sds_rings[ring];
1508 netif_napi_del(&sds_ring->napi);
1509 }
1510
1511 qlcnic_free_sds_rings(adapter->recv_ctx);
1512
1513 if (qlcnic_check_multi_tx(adapter) && !adapter->ahw->diag_test) {
1514 for (ring = 0; ring < adapter->drv_tx_rings; ring++) {
1515 tx_ring = &adapter->tx_ring[ring];
1516 netif_napi_del(&tx_ring->napi);
1517 }
1518 }
1519
1520 qlcnic_free_tx_rings(adapter);
1521 }
1522
1523 void qlcnic_82xx_napi_enable(struct qlcnic_adapter *adapter)
1524 {
1525 int ring;
1526 struct qlcnic_host_sds_ring *sds_ring;
1527 struct qlcnic_host_tx_ring *tx_ring;
1528 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1529
1530 if (adapter->is_up != QLCNIC_ADAPTER_UP_MAGIC)
1531 return;
1532
1533 for (ring = 0; ring < adapter->drv_sds_rings; ring++) {
1534 sds_ring = &recv_ctx->sds_rings[ring];
1535 napi_enable(&sds_ring->napi);
1536 qlcnic_enable_int(sds_ring);
1537 }
1538
1539 if (qlcnic_check_multi_tx(adapter) &&
1540 (adapter->flags & QLCNIC_MSIX_ENABLED) &&
1541 !adapter->ahw->diag_test &&
1542 (adapter->drv_tx_rings > QLCNIC_SINGLE_RING)) {
1543 for (ring = 0; ring < adapter->drv_tx_rings; ring++) {
1544 tx_ring = &adapter->tx_ring[ring];
1545 napi_enable(&tx_ring->napi);
1546 qlcnic_enable_tx_intr(adapter, tx_ring);
1547 }
1548 }
1549 }
1550
1551 void qlcnic_82xx_napi_disable(struct qlcnic_adapter *adapter)
1552 {
1553 int ring;
1554 struct qlcnic_host_sds_ring *sds_ring;
1555 struct qlcnic_host_tx_ring *tx_ring;
1556 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1557
1558 if (adapter->is_up != QLCNIC_ADAPTER_UP_MAGIC)
1559 return;
1560
1561 for (ring = 0; ring < adapter->drv_sds_rings; ring++) {
1562 sds_ring = &recv_ctx->sds_rings[ring];
1563 qlcnic_disable_int(sds_ring);
1564 napi_synchronize(&sds_ring->napi);
1565 napi_disable(&sds_ring->napi);
1566 }
1567
1568 if ((adapter->flags & QLCNIC_MSIX_ENABLED) &&
1569 !adapter->ahw->diag_test &&
1570 qlcnic_check_multi_tx(adapter)) {
1571 for (ring = 0; ring < adapter->drv_tx_rings; ring++) {
1572 tx_ring = &adapter->tx_ring[ring];
1573 qlcnic_disable_tx_int(adapter, tx_ring);
1574 napi_synchronize(&tx_ring->napi);
1575 napi_disable(&tx_ring->napi);
1576 }
1577 }
1578 }
1579
1580 #define QLC_83XX_NORMAL_LB_PKT (1ULL << 36)
1581 #define QLC_83XX_LRO_LB_PKT (1ULL << 46)
1582
1583 static inline int qlcnic_83xx_is_lb_pkt(u64 sts_data, int lro_pkt)
1584 {
1585 if (lro_pkt)
1586 return (sts_data & QLC_83XX_LRO_LB_PKT) ? 1 : 0;
1587 else
1588 return (sts_data & QLC_83XX_NORMAL_LB_PKT) ? 1 : 0;
1589 }
1590
1591 static struct qlcnic_rx_buffer *
1592 qlcnic_83xx_process_rcv(struct qlcnic_adapter *adapter,
1593 struct qlcnic_host_sds_ring *sds_ring,
1594 u8 ring, u64 sts_data[])
1595 {
1596 struct net_device *netdev = adapter->netdev;
1597 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1598 struct qlcnic_rx_buffer *buffer;
1599 struct sk_buff *skb;
1600 struct qlcnic_host_rds_ring *rds_ring;
1601 int index, length, cksum, is_lb_pkt;
1602 u16 vid = 0xffff, t_vid;
1603
1604 if (unlikely(ring >= adapter->max_rds_rings))
1605 return NULL;
1606
1607 rds_ring = &recv_ctx->rds_rings[ring];
1608
1609 index = qlcnic_83xx_hndl(sts_data[0]);
1610 if (unlikely(index >= rds_ring->num_desc))
1611 return NULL;
1612
1613 buffer = &rds_ring->rx_buf_arr[index];
1614 length = qlcnic_83xx_pktln(sts_data[0]);
1615 cksum = qlcnic_83xx_csum_status(sts_data[1]);
1616 skb = qlcnic_process_rxbuf(adapter, rds_ring, index, cksum);
1617 if (!skb)
1618 return buffer;
1619
1620 if (adapter->drv_mac_learn &&
1621 (adapter->flags & QLCNIC_ESWITCH_ENABLED)) {
1622 t_vid = 0;
1623 is_lb_pkt = qlcnic_83xx_is_lb_pkt(sts_data[1], 0);
1624 qlcnic_add_lb_filter(adapter, skb, is_lb_pkt, t_vid);
1625 }
1626
1627 if (length > rds_ring->skb_size)
1628 skb_put(skb, rds_ring->skb_size);
1629 else
1630 skb_put(skb, length);
1631
1632 if (unlikely(qlcnic_check_rx_tagging(adapter, skb, &vid))) {
1633 adapter->stats.rxdropped++;
1634 dev_kfree_skb(skb);
1635 return buffer;
1636 }
1637
1638 skb->protocol = eth_type_trans(skb, netdev);
1639
1640 if (vid != 0xffff)
1641 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid);
1642
1643 napi_gro_receive(&sds_ring->napi, skb);
1644
1645 adapter->stats.rx_pkts++;
1646 adapter->stats.rxbytes += length;
1647
1648 return buffer;
1649 }
1650
1651 static struct qlcnic_rx_buffer *
1652 qlcnic_83xx_process_lro(struct qlcnic_adapter *adapter,
1653 u8 ring, u64 sts_data[])
1654 {
1655 struct net_device *netdev = adapter->netdev;
1656 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1657 struct qlcnic_rx_buffer *buffer;
1658 struct sk_buff *skb;
1659 struct qlcnic_host_rds_ring *rds_ring;
1660 struct iphdr *iph;
1661 struct ipv6hdr *ipv6h;
1662 struct tcphdr *th;
1663 bool push;
1664 int l2_hdr_offset, l4_hdr_offset;
1665 int index, is_lb_pkt;
1666 u16 lro_length, length, data_offset, gso_size;
1667 u16 vid = 0xffff, t_vid;
1668
1669 if (unlikely(ring > adapter->max_rds_rings))
1670 return NULL;
1671
1672 rds_ring = &recv_ctx->rds_rings[ring];
1673
1674 index = qlcnic_83xx_hndl(sts_data[0]);
1675 if (unlikely(index > rds_ring->num_desc))
1676 return NULL;
1677
1678 buffer = &rds_ring->rx_buf_arr[index];
1679
1680 lro_length = qlcnic_83xx_lro_pktln(sts_data[0]);
1681 l2_hdr_offset = qlcnic_83xx_l2_hdr_off(sts_data[1]);
1682 l4_hdr_offset = qlcnic_83xx_l4_hdr_off(sts_data[1]);
1683 push = qlcnic_83xx_is_psh_bit(sts_data[1]);
1684
1685 skb = qlcnic_process_rxbuf(adapter, rds_ring, index, STATUS_CKSUM_OK);
1686 if (!skb)
1687 return buffer;
1688
1689 if (adapter->drv_mac_learn &&
1690 (adapter->flags & QLCNIC_ESWITCH_ENABLED)) {
1691 t_vid = 0;
1692 is_lb_pkt = qlcnic_83xx_is_lb_pkt(sts_data[1], 1);
1693 qlcnic_add_lb_filter(adapter, skb, is_lb_pkt, t_vid);
1694 }
1695 if (qlcnic_83xx_is_tstamp(sts_data[1]))
1696 data_offset = l4_hdr_offset + QLCNIC_TCP_TS_HDR_SIZE;
1697 else
1698 data_offset = l4_hdr_offset + QLCNIC_TCP_HDR_SIZE;
1699
1700 skb_put(skb, lro_length + data_offset);
1701 skb_pull(skb, l2_hdr_offset);
1702
1703 if (unlikely(qlcnic_check_rx_tagging(adapter, skb, &vid))) {
1704 adapter->stats.rxdropped++;
1705 dev_kfree_skb(skb);
1706 return buffer;
1707 }
1708
1709 skb->protocol = eth_type_trans(skb, netdev);
1710 if (ntohs(skb->protocol) == ETH_P_IPV6) {
1711 ipv6h = (struct ipv6hdr *)skb->data;
1712 th = (struct tcphdr *)(skb->data + sizeof(struct ipv6hdr));
1713
1714 length = (th->doff << 2) + lro_length;
1715 ipv6h->payload_len = htons(length);
1716 } else {
1717 iph = (struct iphdr *)skb->data;
1718 th = (struct tcphdr *)(skb->data + (iph->ihl << 2));
1719 length = (iph->ihl << 2) + (th->doff << 2) + lro_length;
1720 csum_replace2(&iph->check, iph->tot_len, htons(length));
1721 iph->tot_len = htons(length);
1722 }
1723
1724 th->psh = push;
1725 length = skb->len;
1726
1727 if (adapter->flags & QLCNIC_FW_LRO_MSS_CAP) {
1728 gso_size = qlcnic_83xx_get_lro_sts_mss(sts_data[0]);
1729 skb_shinfo(skb)->gso_size = gso_size;
1730 if (skb->protocol == htons(ETH_P_IPV6))
1731 skb_shinfo(skb)->gso_type = SKB_GSO_TCPV6;
1732 else
1733 skb_shinfo(skb)->gso_type = SKB_GSO_TCPV4;
1734 }
1735
1736 if (vid != 0xffff)
1737 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid);
1738
1739 netif_receive_skb(skb);
1740
1741 adapter->stats.lro_pkts++;
1742 adapter->stats.lrobytes += length;
1743 return buffer;
1744 }
1745
1746 static int qlcnic_83xx_process_rcv_ring(struct qlcnic_host_sds_ring *sds_ring,
1747 int max)
1748 {
1749 struct qlcnic_host_rds_ring *rds_ring;
1750 struct qlcnic_adapter *adapter = sds_ring->adapter;
1751 struct list_head *cur;
1752 struct status_desc *desc;
1753 struct qlcnic_rx_buffer *rxbuf = NULL;
1754 u8 ring;
1755 u64 sts_data[2];
1756 int count = 0, opcode;
1757 u32 consumer = sds_ring->consumer;
1758
1759 while (count < max) {
1760 desc = &sds_ring->desc_head[consumer];
1761 sts_data[1] = le64_to_cpu(desc->status_desc_data[1]);
1762 opcode = qlcnic_83xx_opcode(sts_data[1]);
1763 if (!opcode)
1764 break;
1765 sts_data[0] = le64_to_cpu(desc->status_desc_data[0]);
1766 ring = QLCNIC_FETCH_RING_ID(sts_data[0]);
1767
1768 switch (opcode) {
1769 case QLC_83XX_REG_DESC:
1770 rxbuf = qlcnic_83xx_process_rcv(adapter, sds_ring,
1771 ring, sts_data);
1772 break;
1773 case QLC_83XX_LRO_DESC:
1774 rxbuf = qlcnic_83xx_process_lro(adapter, ring,
1775 sts_data);
1776 break;
1777 default:
1778 dev_info(&adapter->pdev->dev,
1779 "Unknown opcode: 0x%x\n", opcode);
1780 goto skip;
1781 }
1782
1783 if (likely(rxbuf))
1784 list_add_tail(&rxbuf->list, &sds_ring->free_list[ring]);
1785 else
1786 adapter->stats.null_rxbuf++;
1787 skip:
1788 desc = &sds_ring->desc_head[consumer];
1789 /* Reset the descriptor */
1790 desc->status_desc_data[1] = 0;
1791 consumer = get_next_index(consumer, sds_ring->num_desc);
1792 count++;
1793 }
1794 for (ring = 0; ring < adapter->max_rds_rings; ring++) {
1795 rds_ring = &adapter->recv_ctx->rds_rings[ring];
1796 if (!list_empty(&sds_ring->free_list[ring])) {
1797 list_for_each(cur, &sds_ring->free_list[ring]) {
1798 rxbuf = list_entry(cur, struct qlcnic_rx_buffer,
1799 list);
1800 qlcnic_alloc_rx_skb(adapter, rds_ring, rxbuf);
1801 }
1802 spin_lock(&rds_ring->lock);
1803 list_splice_tail_init(&sds_ring->free_list[ring],
1804 &rds_ring->free_list);
1805 spin_unlock(&rds_ring->lock);
1806 }
1807 qlcnic_post_rx_buffers_nodb(adapter, rds_ring, ring);
1808 }
1809 if (count) {
1810 sds_ring->consumer = consumer;
1811 writel(consumer, sds_ring->crb_sts_consumer);
1812 }
1813 return count;
1814 }
1815
1816 static int qlcnic_83xx_msix_sriov_vf_poll(struct napi_struct *napi, int budget)
1817 {
1818 int tx_complete;
1819 int work_done;
1820 struct qlcnic_host_sds_ring *sds_ring;
1821 struct qlcnic_adapter *adapter;
1822 struct qlcnic_host_tx_ring *tx_ring;
1823
1824 sds_ring = container_of(napi, struct qlcnic_host_sds_ring, napi);
1825 adapter = sds_ring->adapter;
1826 /* tx ring count = 1 */
1827 tx_ring = adapter->tx_ring;
1828
1829 tx_complete = qlcnic_process_cmd_ring(adapter, tx_ring, budget);
1830 work_done = qlcnic_83xx_process_rcv_ring(sds_ring, budget);
1831 if ((work_done < budget) && tx_complete) {
1832 napi_complete(&sds_ring->napi);
1833 qlcnic_83xx_enable_intr(adapter, sds_ring);
1834 }
1835
1836 return work_done;
1837 }
1838
1839 static int qlcnic_83xx_poll(struct napi_struct *napi, int budget)
1840 {
1841 int tx_complete;
1842 int work_done;
1843 struct qlcnic_host_sds_ring *sds_ring;
1844 struct qlcnic_adapter *adapter;
1845 struct qlcnic_host_tx_ring *tx_ring;
1846
1847 sds_ring = container_of(napi, struct qlcnic_host_sds_ring, napi);
1848 adapter = sds_ring->adapter;
1849 /* tx ring count = 1 */
1850 tx_ring = adapter->tx_ring;
1851
1852 tx_complete = qlcnic_process_cmd_ring(adapter, tx_ring, budget);
1853 work_done = qlcnic_83xx_process_rcv_ring(sds_ring, budget);
1854 if ((work_done < budget) && tx_complete) {
1855 napi_complete(&sds_ring->napi);
1856 qlcnic_83xx_enable_intr(adapter, sds_ring);
1857 }
1858
1859 return work_done;
1860 }
1861
1862 static int qlcnic_83xx_msix_tx_poll(struct napi_struct *napi, int budget)
1863 {
1864 int work_done;
1865 struct qlcnic_host_tx_ring *tx_ring;
1866 struct qlcnic_adapter *adapter;
1867
1868 budget = QLCNIC_TX_POLL_BUDGET;
1869 tx_ring = container_of(napi, struct qlcnic_host_tx_ring, napi);
1870 adapter = tx_ring->adapter;
1871 work_done = qlcnic_process_cmd_ring(adapter, tx_ring, budget);
1872 if (work_done) {
1873 napi_complete(&tx_ring->napi);
1874 if (test_bit(__QLCNIC_DEV_UP , &adapter->state))
1875 qlcnic_83xx_enable_tx_intr(adapter, tx_ring);
1876 }
1877
1878 return work_done;
1879 }
1880
1881 static int qlcnic_83xx_rx_poll(struct napi_struct *napi, int budget)
1882 {
1883 int work_done;
1884 struct qlcnic_host_sds_ring *sds_ring;
1885 struct qlcnic_adapter *adapter;
1886
1887 sds_ring = container_of(napi, struct qlcnic_host_sds_ring, napi);
1888 adapter = sds_ring->adapter;
1889 work_done = qlcnic_83xx_process_rcv_ring(sds_ring, budget);
1890 if (work_done < budget) {
1891 napi_complete(&sds_ring->napi);
1892 if (test_bit(__QLCNIC_DEV_UP, &adapter->state))
1893 qlcnic_83xx_enable_intr(adapter, sds_ring);
1894 }
1895
1896 return work_done;
1897 }
1898
1899 void qlcnic_83xx_napi_enable(struct qlcnic_adapter *adapter)
1900 {
1901 int ring;
1902 struct qlcnic_host_sds_ring *sds_ring;
1903 struct qlcnic_host_tx_ring *tx_ring;
1904 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1905
1906 if (adapter->is_up != QLCNIC_ADAPTER_UP_MAGIC)
1907 return;
1908
1909 for (ring = 0; ring < adapter->drv_sds_rings; ring++) {
1910 sds_ring = &recv_ctx->sds_rings[ring];
1911 napi_enable(&sds_ring->napi);
1912 if (adapter->flags & QLCNIC_MSIX_ENABLED)
1913 qlcnic_83xx_enable_intr(adapter, sds_ring);
1914 }
1915
1916 if ((adapter->flags & QLCNIC_MSIX_ENABLED) &&
1917 !(adapter->flags & QLCNIC_TX_INTR_SHARED)) {
1918 for (ring = 0; ring < adapter->drv_tx_rings; ring++) {
1919 tx_ring = &adapter->tx_ring[ring];
1920 napi_enable(&tx_ring->napi);
1921 qlcnic_83xx_enable_tx_intr(adapter, tx_ring);
1922 }
1923 }
1924 }
1925
1926 void qlcnic_83xx_napi_disable(struct qlcnic_adapter *adapter)
1927 {
1928 int ring;
1929 struct qlcnic_host_sds_ring *sds_ring;
1930 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1931 struct qlcnic_host_tx_ring *tx_ring;
1932
1933 if (adapter->is_up != QLCNIC_ADAPTER_UP_MAGIC)
1934 return;
1935
1936 for (ring = 0; ring < adapter->drv_sds_rings; ring++) {
1937 sds_ring = &recv_ctx->sds_rings[ring];
1938 if (adapter->flags & QLCNIC_MSIX_ENABLED)
1939 qlcnic_83xx_disable_intr(adapter, sds_ring);
1940 napi_synchronize(&sds_ring->napi);
1941 napi_disable(&sds_ring->napi);
1942 }
1943
1944 if ((adapter->flags & QLCNIC_MSIX_ENABLED) &&
1945 !(adapter->flags & QLCNIC_TX_INTR_SHARED)) {
1946 for (ring = 0; ring < adapter->drv_tx_rings; ring++) {
1947 tx_ring = &adapter->tx_ring[ring];
1948 qlcnic_83xx_disable_tx_intr(adapter, tx_ring);
1949 napi_synchronize(&tx_ring->napi);
1950 napi_disable(&tx_ring->napi);
1951 }
1952 }
1953 }
1954
1955 int qlcnic_83xx_napi_add(struct qlcnic_adapter *adapter,
1956 struct net_device *netdev)
1957 {
1958 int ring;
1959 struct qlcnic_host_sds_ring *sds_ring;
1960 struct qlcnic_host_tx_ring *tx_ring;
1961 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1962
1963 if (qlcnic_alloc_sds_rings(recv_ctx, adapter->drv_sds_rings))
1964 return -ENOMEM;
1965
1966 for (ring = 0; ring < adapter->drv_sds_rings; ring++) {
1967 sds_ring = &recv_ctx->sds_rings[ring];
1968 if (adapter->flags & QLCNIC_MSIX_ENABLED) {
1969 if (!(adapter->flags & QLCNIC_TX_INTR_SHARED))
1970 netif_napi_add(netdev, &sds_ring->napi,
1971 qlcnic_83xx_rx_poll,
1972 NAPI_POLL_WEIGHT);
1973 else
1974 netif_napi_add(netdev, &sds_ring->napi,
1975 qlcnic_83xx_msix_sriov_vf_poll,
1976 NAPI_POLL_WEIGHT);
1977
1978 } else {
1979 netif_napi_add(netdev, &sds_ring->napi,
1980 qlcnic_83xx_poll,
1981 NAPI_POLL_WEIGHT);
1982 }
1983 }
1984
1985 if (qlcnic_alloc_tx_rings(adapter, netdev)) {
1986 qlcnic_free_sds_rings(recv_ctx);
1987 return -ENOMEM;
1988 }
1989
1990 if ((adapter->flags & QLCNIC_MSIX_ENABLED) &&
1991 !(adapter->flags & QLCNIC_TX_INTR_SHARED)) {
1992 for (ring = 0; ring < adapter->drv_tx_rings; ring++) {
1993 tx_ring = &adapter->tx_ring[ring];
1994 netif_napi_add(netdev, &tx_ring->napi,
1995 qlcnic_83xx_msix_tx_poll,
1996 NAPI_POLL_WEIGHT);
1997 }
1998 }
1999
2000 return 0;
2001 }
2002
2003 void qlcnic_83xx_napi_del(struct qlcnic_adapter *adapter)
2004 {
2005 int ring;
2006 struct qlcnic_host_sds_ring *sds_ring;
2007 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
2008 struct qlcnic_host_tx_ring *tx_ring;
2009
2010 for (ring = 0; ring < adapter->drv_sds_rings; ring++) {
2011 sds_ring = &recv_ctx->sds_rings[ring];
2012 netif_napi_del(&sds_ring->napi);
2013 }
2014
2015 qlcnic_free_sds_rings(adapter->recv_ctx);
2016
2017 if ((adapter->flags & QLCNIC_MSIX_ENABLED) &&
2018 !(adapter->flags & QLCNIC_TX_INTR_SHARED)) {
2019 for (ring = 0; ring < adapter->drv_tx_rings; ring++) {
2020 tx_ring = &adapter->tx_ring[ring];
2021 netif_napi_del(&tx_ring->napi);
2022 }
2023 }
2024
2025 qlcnic_free_tx_rings(adapter);
2026 }
2027
2028 void qlcnic_83xx_process_rcv_diag(struct qlcnic_adapter *adapter,
2029 int ring, u64 sts_data[])
2030 {
2031 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
2032 struct sk_buff *skb;
2033 struct qlcnic_host_rds_ring *rds_ring;
2034 int index, length;
2035
2036 if (unlikely(ring >= adapter->max_rds_rings))
2037 return;
2038
2039 rds_ring = &recv_ctx->rds_rings[ring];
2040 index = qlcnic_83xx_hndl(sts_data[0]);
2041 if (unlikely(index >= rds_ring->num_desc))
2042 return;
2043
2044 length = qlcnic_83xx_pktln(sts_data[0]);
2045
2046 skb = qlcnic_process_rxbuf(adapter, rds_ring, index, STATUS_CKSUM_OK);
2047 if (!skb)
2048 return;
2049
2050 if (length > rds_ring->skb_size)
2051 skb_put(skb, rds_ring->skb_size);
2052 else
2053 skb_put(skb, length);
2054
2055 if (!qlcnic_check_loopback_buff(skb->data, adapter->mac_addr))
2056 adapter->ahw->diag_cnt++;
2057 else
2058 dump_skb(skb, adapter);
2059
2060 dev_kfree_skb_any(skb);
2061 return;
2062 }
2063
2064 void qlcnic_83xx_process_rcv_ring_diag(struct qlcnic_host_sds_ring *sds_ring)
2065 {
2066 struct qlcnic_adapter *adapter = sds_ring->adapter;
2067 struct status_desc *desc;
2068 u64 sts_data[2];
2069 int ring, opcode;
2070 u32 consumer = sds_ring->consumer;
2071
2072 desc = &sds_ring->desc_head[consumer];
2073 sts_data[0] = le64_to_cpu(desc->status_desc_data[0]);
2074 sts_data[1] = le64_to_cpu(desc->status_desc_data[1]);
2075 opcode = qlcnic_83xx_opcode(sts_data[1]);
2076 if (!opcode)
2077 return;
2078
2079 ring = QLCNIC_FETCH_RING_ID(qlcnic_83xx_hndl(sts_data[0]));
2080 qlcnic_83xx_process_rcv_diag(adapter, ring, sts_data);
2081 desc = &sds_ring->desc_head[consumer];
2082 desc->status_desc_data[0] = cpu_to_le64(STATUS_OWNER_PHANTOM);
2083 consumer = get_next_index(consumer, sds_ring->num_desc);
2084 sds_ring->consumer = consumer;
2085 writel(consumer, sds_ring->crb_sts_consumer);
2086 }
Linux kernel - Deliverables
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