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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 QLCNIC_TX_ETHER_PKT 0x01
17#define QLCNIC_TX_TCP_PKT 0x02
18#define QLCNIC_TX_UDP_PKT 0x03
19#define QLCNIC_TX_IP_PKT 0x04
20#define QLCNIC_TX_TCP_LSO 0x05
21#define QLCNIC_TX_TCP_LSO6 0x06
22#define QLCNIC_TX_ENCAP_PKT 0x07
23#define QLCNIC_TX_ENCAP_LSO 0x08
24#define QLCNIC_TX_TCPV6_PKT 0x0b
25#define QLCNIC_TX_UDPV6_PKT 0x0c
26
27#define QLCNIC_FLAGS_VLAN_TAGGED 0x10
28#define QLCNIC_FLAGS_VLAN_OOB 0x40
29
30#define qlcnic_set_tx_vlan_tci(cmd_desc, v) \
31 (cmd_desc)->vlan_TCI = cpu_to_le16(v);
32#define qlcnic_set_cmd_desc_port(cmd_desc, var) \
33 ((cmd_desc)->port_ctxid |= ((var) & 0x0F))
34#define qlcnic_set_cmd_desc_ctxid(cmd_desc, var) \
35 ((cmd_desc)->port_ctxid |= ((var) << 4 & 0xF0))
36
37#define qlcnic_set_tx_port(_desc, _port) \
38 ((_desc)->port_ctxid = ((_port) & 0xf) | (((_port) << 4) & 0xf0))
39
40#define qlcnic_set_tx_flags_opcode(_desc, _flags, _opcode) \
41 ((_desc)->flags_opcode |= \
42 cpu_to_le16(((_flags) & 0x7f) | (((_opcode) & 0x3f) << 7)))
43
44#define qlcnic_set_tx_frags_len(_desc, _frags, _len) \
45 ((_desc)->nfrags__length = \
46 cpu_to_le32(((_frags) & 0xff) | (((_len) & 0xffffff) << 8)))
47
48
49#define STATUS_OWNER_HOST (0x1ULL << 56)
50#define STATUS_OWNER_PHANTOM (0x2ULL << 56)
51
52
53
54
55
56
57#define qlcnic_get_sts_port(sts_data) \
58 ((sts_data) & 0x0F)
59#define qlcnic_get_sts_status(sts_data) \
60 (((sts_data) >> 4) & 0x0F)
61#define qlcnic_get_sts_type(sts_data) \
62 (((sts_data) >> 8) & 0x0F)
63#define qlcnic_get_sts_totallength(sts_data) \
64 (((sts_data) >> 12) & 0xFFFF)
65#define qlcnic_get_sts_refhandle(sts_data) \
66 (((sts_data) >> 28) & 0xFFFF)
67#define qlcnic_get_sts_prot(sts_data) \
68 (((sts_data) >> 44) & 0x0F)
69#define qlcnic_get_sts_pkt_offset(sts_data) \
70 (((sts_data) >> 48) & 0x1F)
71#define qlcnic_get_sts_desc_cnt(sts_data) \
72 (((sts_data) >> 53) & 0x7)
73#define qlcnic_get_sts_opcode(sts_data) \
74 (((sts_data) >> 58) & 0x03F)
75
76#define qlcnic_get_lro_sts_refhandle(sts_data) \
77 ((sts_data) & 0x07FFF)
78#define qlcnic_get_lro_sts_length(sts_data) \
79 (((sts_data) >> 16) & 0x0FFFF)
80#define qlcnic_get_lro_sts_l2_hdr_offset(sts_data) \
81 (((sts_data) >> 32) & 0x0FF)
82#define qlcnic_get_lro_sts_l4_hdr_offset(sts_data) \
83 (((sts_data) >> 40) & 0x0FF)
84#define qlcnic_get_lro_sts_timestamp(sts_data) \
85 (((sts_data) >> 48) & 0x1)
86#define qlcnic_get_lro_sts_type(sts_data) \
87 (((sts_data) >> 49) & 0x7)
88#define qlcnic_get_lro_sts_push_flag(sts_data) \
89 (((sts_data) >> 52) & 0x1)
90#define qlcnic_get_lro_sts_seq_number(sts_data) \
91 ((sts_data) & 0x0FFFFFFFF)
92#define qlcnic_get_lro_sts_mss(sts_data1) \
93 ((sts_data1 >> 32) & 0x0FFFF)
94
95#define qlcnic_83xx_get_lro_sts_mss(sts) ((sts) & 0xffff)
96
97
98#define QLCNIC_SYN_OFFLOAD 0x03
99#define QLCNIC_RXPKT_DESC 0x04
100#define QLCNIC_OLD_RXPKT_DESC 0x3f
101#define QLCNIC_RESPONSE_DESC 0x05
102#define QLCNIC_LRO_DESC 0x12
103
104#define QLCNIC_TX_POLL_BUDGET 128
105#define QLCNIC_TCP_HDR_SIZE 20
106#define QLCNIC_TCP_TS_OPTION_SIZE 12
107#define QLCNIC_FETCH_RING_ID(handle) ((handle) >> 63)
108#define QLCNIC_DESC_OWNER_FW cpu_to_le64(STATUS_OWNER_PHANTOM)
109
110#define QLCNIC_TCP_TS_HDR_SIZE (QLCNIC_TCP_HDR_SIZE + QLCNIC_TCP_TS_OPTION_SIZE)
111
112
113#define STATUS_CKSUM_LOOP 0
114#define STATUS_CKSUM_OK 2
115
116#define qlcnic_83xx_pktln(sts) ((sts >> 32) & 0x3FFF)
117#define qlcnic_83xx_hndl(sts) ((sts >> 48) & 0x7FFF)
118#define qlcnic_83xx_csum_status(sts) ((sts >> 39) & 7)
119#define qlcnic_83xx_opcode(sts) ((sts >> 42) & 0xF)
120#define qlcnic_83xx_vlan_tag(sts) (((sts) >> 48) & 0xFFFF)
121#define qlcnic_83xx_lro_pktln(sts) (((sts) >> 32) & 0x3FFF)
122#define qlcnic_83xx_l2_hdr_off(sts) (((sts) >> 16) & 0xFF)
123#define qlcnic_83xx_l4_hdr_off(sts) (((sts) >> 24) & 0xFF)
124#define qlcnic_83xx_pkt_cnt(sts) (((sts) >> 16) & 0x7)
125#define qlcnic_83xx_is_tstamp(sts) (((sts) >> 40) & 1)
126#define qlcnic_83xx_is_psh_bit(sts) (((sts) >> 41) & 1)
127#define qlcnic_83xx_is_ip_align(sts) (((sts) >> 46) & 1)
128#define qlcnic_83xx_has_vlan_tag(sts) (((sts) >> 47) & 1)
129
130static int qlcnic_process_rcv_ring(struct qlcnic_host_sds_ring *sds_ring,
131 int max);
132
133static struct sk_buff *qlcnic_process_rxbuf(struct qlcnic_adapter *,
134 struct qlcnic_host_rds_ring *,
135 u16, u16);
136
137static inline u8 qlcnic_mac_hash(u64 mac, u16 vlan)
138{
139 return (u8)((mac & 0xff) ^ ((mac >> 40) & 0xff) ^ (vlan & 0xff));
140}
141
142static inline u32 qlcnic_get_ref_handle(struct qlcnic_adapter *adapter,
143 u16 handle, u8 ring_id)
144{
145 if (qlcnic_83xx_check(adapter))
146 return handle | (ring_id << 15);
147 else
148 return handle;
149}
150
151static inline int qlcnic_82xx_is_lb_pkt(u64 sts_data)
152{
153 return (qlcnic_get_sts_status(sts_data) == STATUS_CKSUM_LOOP) ? 1 : 0;
154}
155
156static void qlcnic_delete_rx_list_mac(struct qlcnic_adapter *adapter,
157 struct qlcnic_filter *fil,
158 void *addr, u16 vlan_id)
159{
160 int ret;
161 u8 op;
162
163 op = vlan_id ? QLCNIC_MAC_VLAN_ADD : QLCNIC_MAC_ADD;
164 ret = qlcnic_sre_macaddr_change(adapter, addr, vlan_id, op);
165 if (ret)
166 return;
167
168 op = vlan_id ? QLCNIC_MAC_VLAN_DEL : QLCNIC_MAC_DEL;
169 ret = qlcnic_sre_macaddr_change(adapter, addr, vlan_id, op);
170 if (!ret) {
171 hlist_del(&fil->fnode);
172 adapter->rx_fhash.fnum--;
173 }
174}
175
176static struct qlcnic_filter *qlcnic_find_mac_filter(struct hlist_head *head,
177 void *addr, u16 vlan_id)
178{
179 struct qlcnic_filter *tmp_fil = NULL;
180 struct hlist_node *n;
181
182 hlist_for_each_entry_safe(tmp_fil, n, head, fnode) {
183 if (ether_addr_equal(tmp_fil->faddr, addr) &&
184 tmp_fil->vlan_id == vlan_id)
185 return tmp_fil;
186 }
187
188 return NULL;
189}
190
191static void qlcnic_add_lb_filter(struct qlcnic_adapter *adapter,
192 struct sk_buff *skb, int loopback_pkt, u16 vlan_id)
193{
194 struct ethhdr *phdr = (struct ethhdr *)(skb->data);
195 struct qlcnic_filter *fil, *tmp_fil;
196 struct hlist_head *head;
197 unsigned long time;
198 u64 src_addr = 0;
199 u8 hindex, op;
200 int ret;
201
202 if (!qlcnic_sriov_pf_check(adapter) || (vlan_id == 0xffff))
203 vlan_id = 0;
204
205 memcpy(&src_addr, phdr->h_source, ETH_ALEN);
206 hindex = qlcnic_mac_hash(src_addr, vlan_id) &
207 (adapter->fhash.fbucket_size - 1);
208
209 if (loopback_pkt) {
210 if (adapter->rx_fhash.fnum >= adapter->rx_fhash.fmax)
211 return;
212
213 head = &(adapter->rx_fhash.fhead[hindex]);
214
215 tmp_fil = qlcnic_find_mac_filter(head, &src_addr, vlan_id);
216 if (tmp_fil) {
217 time = tmp_fil->ftime;
218 if (time_after(jiffies, QLCNIC_READD_AGE * HZ + time))
219 tmp_fil->ftime = jiffies;
220 return;
221 }
222
223 fil = kzalloc(sizeof(struct qlcnic_filter), GFP_ATOMIC);
224 if (!fil)
225 return;
226
227 fil->ftime = jiffies;
228 memcpy(fil->faddr, &src_addr, ETH_ALEN);
229 fil->vlan_id = vlan_id;
230 spin_lock(&adapter->rx_mac_learn_lock);
231 hlist_add_head(&(fil->fnode), head);
232 adapter->rx_fhash.fnum++;
233 spin_unlock(&adapter->rx_mac_learn_lock);
234 } else {
235 head = &adapter->fhash.fhead[hindex];
236
237 spin_lock(&adapter->mac_learn_lock);
238
239 tmp_fil = qlcnic_find_mac_filter(head, &src_addr, vlan_id);
240 if (tmp_fil) {
241 op = vlan_id ? QLCNIC_MAC_VLAN_DEL : QLCNIC_MAC_DEL;
242 ret = qlcnic_sre_macaddr_change(adapter,
243 (u8 *)&src_addr,
244 vlan_id, op);
245 if (!ret) {
246 hlist_del(&tmp_fil->fnode);
247 adapter->fhash.fnum--;
248 }
249
250 spin_unlock(&adapter->mac_learn_lock);
251
252 return;
253 }
254
255 spin_unlock(&adapter->mac_learn_lock);
256
257 head = &adapter->rx_fhash.fhead[hindex];
258
259 spin_lock(&adapter->rx_mac_learn_lock);
260
261 tmp_fil = qlcnic_find_mac_filter(head, &src_addr, vlan_id);
262 if (tmp_fil)
263 qlcnic_delete_rx_list_mac(adapter, tmp_fil, &src_addr,
264 vlan_id);
265
266 spin_unlock(&adapter->rx_mac_learn_lock);
267 }
268}
269
270void qlcnic_82xx_change_filter(struct qlcnic_adapter *adapter, u64 *uaddr,
271 u16 vlan_id)
272{
273 struct cmd_desc_type0 *hwdesc;
274 struct qlcnic_nic_req *req;
275 struct qlcnic_mac_req *mac_req;
276 struct qlcnic_vlan_req *vlan_req;
277 struct qlcnic_host_tx_ring *tx_ring = adapter->tx_ring;
278 u32 producer;
279 u64 word;
280
281 producer = tx_ring->producer;
282 hwdesc = &tx_ring->desc_head[tx_ring->producer];
283
284 req = (struct qlcnic_nic_req *)hwdesc;
285 memset(req, 0, sizeof(struct qlcnic_nic_req));
286 req->qhdr = cpu_to_le64(QLCNIC_REQUEST << 23);
287
288 word = QLCNIC_MAC_EVENT | ((u64)(adapter->portnum) << 16);
289 req->req_hdr = cpu_to_le64(word);
290
291 mac_req = (struct qlcnic_mac_req *)&(req->words[0]);
292 mac_req->op = vlan_id ? QLCNIC_MAC_VLAN_ADD : QLCNIC_MAC_ADD;
293 memcpy(mac_req->mac_addr, uaddr, ETH_ALEN);
294
295 vlan_req = (struct qlcnic_vlan_req *)&req->words[1];
296 vlan_req->vlan_id = cpu_to_le16(vlan_id);
297
298 tx_ring->producer = get_next_index(producer, tx_ring->num_desc);
299 smp_mb();
300}
301
302static void qlcnic_send_filter(struct qlcnic_adapter *adapter,
303 struct cmd_desc_type0 *first_desc,
304 struct sk_buff *skb)
305{
306 struct vlan_ethhdr *vh = (struct vlan_ethhdr *)(skb->data);
307 struct ethhdr *phdr = (struct ethhdr *)(skb->data);
308 u16 protocol = ntohs(skb->protocol);
309 struct qlcnic_filter *fil, *tmp_fil;
310 struct hlist_head *head;
311 struct hlist_node *n;
312 u64 src_addr = 0;
313 u16 vlan_id = 0;
314 u8 hindex, hval;
315
316 if (ether_addr_equal(phdr->h_source, adapter->mac_addr))
317 return;
318
319 if (adapter->flags & QLCNIC_VLAN_FILTERING) {
320 if (protocol == ETH_P_8021Q) {
321 vh = (struct vlan_ethhdr *)skb->data;
322 vlan_id = ntohs(vh->h_vlan_TCI);
323 } else if (vlan_tx_tag_present(skb)) {
324 vlan_id = vlan_tx_tag_get(skb);
325 }
326 }
327
328 memcpy(&src_addr, phdr->h_source, ETH_ALEN);
329 hval = qlcnic_mac_hash(src_addr, vlan_id);
330 hindex = hval & (adapter->fhash.fbucket_size - 1);
331 head = &(adapter->fhash.fhead[hindex]);
332
333 hlist_for_each_entry_safe(tmp_fil, n, head, fnode) {
334 if (ether_addr_equal(tmp_fil->faddr, (u8 *)&src_addr) &&
335 tmp_fil->vlan_id == vlan_id) {
336 if (jiffies > (QLCNIC_READD_AGE * HZ + tmp_fil->ftime))
337 qlcnic_change_filter(adapter, &src_addr,
338 vlan_id);
339 tmp_fil->ftime = jiffies;
340 return;
341 }
342 }
343
344 if (unlikely(adapter->fhash.fnum >= adapter->fhash.fmax)) {
345 adapter->stats.mac_filter_limit_overrun++;
346 return;
347 }
348
349 fil = kzalloc(sizeof(struct qlcnic_filter), GFP_ATOMIC);
350 if (!fil)
351 return;
352
353 qlcnic_change_filter(adapter, &src_addr, vlan_id);
354 fil->ftime = jiffies;
355 fil->vlan_id = vlan_id;
356 memcpy(fil->faddr, &src_addr, ETH_ALEN);
357 spin_lock(&adapter->mac_learn_lock);
358 hlist_add_head(&(fil->fnode), head);
359 adapter->fhash.fnum++;
360 spin_unlock(&adapter->mac_learn_lock);
361}
362
363#define QLCNIC_ENCAP_VXLAN_PKT BIT_0
364#define QLCNIC_ENCAP_OUTER_L3_IP6 BIT_1
365#define QLCNIC_ENCAP_INNER_L3_IP6 BIT_2
366#define QLCNIC_ENCAP_INNER_L4_UDP BIT_3
367#define QLCNIC_ENCAP_DO_L3_CSUM BIT_4
368#define QLCNIC_ENCAP_DO_L4_CSUM BIT_5
369
370static int qlcnic_tx_encap_pkt(struct qlcnic_adapter *adapter,
371 struct cmd_desc_type0 *first_desc,
372 struct sk_buff *skb,
373 struct qlcnic_host_tx_ring *tx_ring)
374{
375 u8 opcode = 0, inner_hdr_len = 0, outer_hdr_len = 0, total_hdr_len = 0;
376 int copied, copy_len, descr_size;
377 u32 producer = tx_ring->producer;
378 struct cmd_desc_type0 *hwdesc;
379 u16 flags = 0, encap_descr = 0;
380
381 opcode = QLCNIC_TX_ETHER_PKT;
382 encap_descr = QLCNIC_ENCAP_VXLAN_PKT;
383
384 if (skb_is_gso(skb)) {
385 inner_hdr_len = skb_inner_transport_header(skb) +
386 inner_tcp_hdrlen(skb) -
387 skb_inner_mac_header(skb);
388
389
390 outer_hdr_len = skb_transport_offset(skb) + 8 +
391 sizeof(struct udphdr);
392 first_desc->outer_hdr_length = outer_hdr_len;
393 total_hdr_len = inner_hdr_len + outer_hdr_len;
394 encap_descr |= QLCNIC_ENCAP_DO_L3_CSUM |
395 QLCNIC_ENCAP_DO_L4_CSUM;
396 first_desc->mss = cpu_to_le16(skb_shinfo(skb)->gso_size);
397 first_desc->hdr_length = inner_hdr_len;
398
399
400
401
402
403 copied = 0;
404 descr_size = (int)sizeof(struct cmd_desc_type0);
405 while (copied < total_hdr_len) {
406 copy_len = min(descr_size, (total_hdr_len - copied));
407 hwdesc = &tx_ring->desc_head[producer];
408 tx_ring->cmd_buf_arr[producer].skb = NULL;
409 skb_copy_from_linear_data_offset(skb, copied,
410 (char *)hwdesc,
411 copy_len);
412 copied += copy_len;
413 producer = get_next_index(producer, tx_ring->num_desc);
414 }
415
416 tx_ring->producer = producer;
417
418
419
420
421 smp_mb();
422 adapter->stats.encap_lso_frames++;
423
424 opcode = QLCNIC_TX_ENCAP_LSO;
425 } else if (skb->ip_summed == CHECKSUM_PARTIAL) {
426 if (inner_ip_hdr(skb)->version == 6) {
427 if (inner_ipv6_hdr(skb)->nexthdr == IPPROTO_UDP)
428 encap_descr |= QLCNIC_ENCAP_INNER_L4_UDP;
429 } else {
430 if (inner_ip_hdr(skb)->protocol == IPPROTO_UDP)
431 encap_descr |= QLCNIC_ENCAP_INNER_L4_UDP;
432 }
433
434 adapter->stats.encap_tx_csummed++;
435 opcode = QLCNIC_TX_ENCAP_PKT;
436 }
437
438
439 if (ip_hdr(skb)->version == 6)
440 encap_descr |= QLCNIC_ENCAP_OUTER_L3_IP6;
441
442
443 encap_descr |= (skb_network_header_len(skb) >> 2) << 6;
444
445
446 encap_descr |= skb_network_offset(skb) << 10;
447 first_desc->encap_descr = cpu_to_le16(encap_descr);
448
449 first_desc->tcp_hdr_offset = skb_inner_transport_header(skb) -
450 skb->data;
451 first_desc->ip_hdr_offset = skb_inner_network_offset(skb);
452
453 qlcnic_set_tx_flags_opcode(first_desc, flags, opcode);
454
455 return 0;
456}
457
458static int qlcnic_tx_pkt(struct qlcnic_adapter *adapter,
459 struct cmd_desc_type0 *first_desc, struct sk_buff *skb,
460 struct qlcnic_host_tx_ring *tx_ring)
461{
462 u8 l4proto, opcode = 0, hdr_len = 0;
463 u16 flags = 0, vlan_tci = 0;
464 int copied, offset, copy_len, size;
465 struct cmd_desc_type0 *hwdesc;
466 struct vlan_ethhdr *vh;
467 u16 protocol = ntohs(skb->protocol);
468 u32 producer = tx_ring->producer;
469
470 if (protocol == ETH_P_8021Q) {
471 vh = (struct vlan_ethhdr *)skb->data;
472 flags = QLCNIC_FLAGS_VLAN_TAGGED;
473 vlan_tci = ntohs(vh->h_vlan_TCI);
474 protocol = ntohs(vh->h_vlan_encapsulated_proto);
475 } else if (vlan_tx_tag_present(skb)) {
476 flags = QLCNIC_FLAGS_VLAN_OOB;
477 vlan_tci = vlan_tx_tag_get(skb);
478 }
479 if (unlikely(adapter->tx_pvid)) {
480 if (vlan_tci && !(adapter->flags & QLCNIC_TAGGING_ENABLED))
481 return -EIO;
482 if (vlan_tci && (adapter->flags & QLCNIC_TAGGING_ENABLED))
483 goto set_flags;
484
485 flags = QLCNIC_FLAGS_VLAN_OOB;
486 vlan_tci = adapter->tx_pvid;
487 }
488set_flags:
489 qlcnic_set_tx_vlan_tci(first_desc, vlan_tci);
490 qlcnic_set_tx_flags_opcode(first_desc, flags, opcode);
491
492 if (*(skb->data) & BIT_0) {
493 flags |= BIT_0;
494 memcpy(&first_desc->eth_addr, skb->data, ETH_ALEN);
495 }
496 opcode = QLCNIC_TX_ETHER_PKT;
497 if (skb_is_gso(skb)) {
498 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
499 first_desc->mss = cpu_to_le16(skb_shinfo(skb)->gso_size);
500 first_desc->hdr_length = hdr_len;
501 opcode = (protocol == ETH_P_IPV6) ? QLCNIC_TX_TCP_LSO6 :
502 QLCNIC_TX_TCP_LSO;
503
504
505
506 copied = 0;
507 offset = 2;
508
509 if (flags & QLCNIC_FLAGS_VLAN_OOB) {
510 first_desc->hdr_length += VLAN_HLEN;
511 first_desc->tcp_hdr_offset = VLAN_HLEN;
512 first_desc->ip_hdr_offset = VLAN_HLEN;
513
514
515 flags |= QLCNIC_FLAGS_VLAN_TAGGED;
516
517
518 hwdesc = &tx_ring->desc_head[producer];
519 tx_ring->cmd_buf_arr[producer].skb = NULL;
520
521 copy_len = min((int)sizeof(struct cmd_desc_type0) -
522 offset, hdr_len + VLAN_HLEN);
523
524 vh = (struct vlan_ethhdr *)((char *) hwdesc + 2);
525 skb_copy_from_linear_data(skb, vh, 12);
526 vh->h_vlan_proto = htons(ETH_P_8021Q);
527 vh->h_vlan_TCI = htons(vlan_tci);
528
529 skb_copy_from_linear_data_offset(skb, 12,
530 (char *)vh + 16,
531 copy_len - 16);
532 copied = copy_len - VLAN_HLEN;
533 offset = 0;
534 producer = get_next_index(producer, tx_ring->num_desc);
535 }
536
537 while (copied < hdr_len) {
538 size = (int)sizeof(struct cmd_desc_type0) - offset;
539 copy_len = min(size, (hdr_len - copied));
540 hwdesc = &tx_ring->desc_head[producer];
541 tx_ring->cmd_buf_arr[producer].skb = NULL;
542 skb_copy_from_linear_data_offset(skb, copied,
543 (char *)hwdesc +
544 offset, copy_len);
545 copied += copy_len;
546 offset = 0;
547 producer = get_next_index(producer, tx_ring->num_desc);
548 }
549
550 tx_ring->producer = producer;
551 smp_mb();
552 adapter->stats.lso_frames++;
553
554 } else if (skb->ip_summed == CHECKSUM_PARTIAL) {
555 if (protocol == ETH_P_IP) {
556 l4proto = ip_hdr(skb)->protocol;
557
558 if (l4proto == IPPROTO_TCP)
559 opcode = QLCNIC_TX_TCP_PKT;
560 else if (l4proto == IPPROTO_UDP)
561 opcode = QLCNIC_TX_UDP_PKT;
562 } else if (protocol == ETH_P_IPV6) {
563 l4proto = ipv6_hdr(skb)->nexthdr;
564
565 if (l4proto == IPPROTO_TCP)
566 opcode = QLCNIC_TX_TCPV6_PKT;
567 else if (l4proto == IPPROTO_UDP)
568 opcode = QLCNIC_TX_UDPV6_PKT;
569 }
570 }
571 first_desc->tcp_hdr_offset += skb_transport_offset(skb);
572 first_desc->ip_hdr_offset += skb_network_offset(skb);
573 qlcnic_set_tx_flags_opcode(first_desc, flags, opcode);
574
575 return 0;
576}
577
578static int qlcnic_map_tx_skb(struct pci_dev *pdev, struct sk_buff *skb,
579 struct qlcnic_cmd_buffer *pbuf)
580{
581 struct qlcnic_skb_frag *nf;
582 struct skb_frag_struct *frag;
583 int i, nr_frags;
584 dma_addr_t map;
585
586 nr_frags = skb_shinfo(skb)->nr_frags;
587 nf = &pbuf->frag_array[0];
588
589 map = pci_map_single(pdev, skb->data, skb_headlen(skb),
590 PCI_DMA_TODEVICE);
591 if (pci_dma_mapping_error(pdev, map))
592 goto out_err;
593
594 nf->dma = map;
595 nf->length = skb_headlen(skb);
596
597 for (i = 0; i < nr_frags; i++) {
598 frag = &skb_shinfo(skb)->frags[i];
599 nf = &pbuf->frag_array[i+1];
600 map = skb_frag_dma_map(&pdev->dev, frag, 0, skb_frag_size(frag),
601 DMA_TO_DEVICE);
602 if (dma_mapping_error(&pdev->dev, map))
603 goto unwind;
604
605 nf->dma = map;
606 nf->length = skb_frag_size(frag);
607 }
608
609 return 0;
610
611unwind:
612 while (--i >= 0) {
613 nf = &pbuf->frag_array[i+1];
614 pci_unmap_page(pdev, nf->dma, nf->length, PCI_DMA_TODEVICE);
615 }
616
617 nf = &pbuf->frag_array[0];
618 pci_unmap_single(pdev, nf->dma, skb_headlen(skb), PCI_DMA_TODEVICE);
619
620out_err:
621 return -ENOMEM;
622}
623
624static void qlcnic_unmap_buffers(struct pci_dev *pdev, struct sk_buff *skb,
625 struct qlcnic_cmd_buffer *pbuf)
626{
627 struct qlcnic_skb_frag *nf = &pbuf->frag_array[0];
628 int i, nr_frags = skb_shinfo(skb)->nr_frags;
629
630 for (i = 0; i < nr_frags; i++) {
631 nf = &pbuf->frag_array[i+1];
632 pci_unmap_page(pdev, nf->dma, nf->length, PCI_DMA_TODEVICE);
633 }
634
635 nf = &pbuf->frag_array[0];
636 pci_unmap_single(pdev, nf->dma, skb_headlen(skb), PCI_DMA_TODEVICE);
637 pbuf->skb = NULL;
638}
639
640static inline void qlcnic_clear_cmddesc(u64 *desc)
641{
642 desc[0] = 0ULL;
643 desc[2] = 0ULL;
644 desc[7] = 0ULL;
645}
646
647netdev_tx_t qlcnic_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
648{
649 struct qlcnic_adapter *adapter = netdev_priv(netdev);
650 struct qlcnic_host_tx_ring *tx_ring;
651 struct qlcnic_cmd_buffer *pbuf;
652 struct qlcnic_skb_frag *buffrag;
653 struct cmd_desc_type0 *hwdesc, *first_desc;
654 struct pci_dev *pdev;
655 struct ethhdr *phdr;
656 int i, k, frag_count, delta = 0;
657 u32 producer, num_txd;
658 u16 protocol;
659 bool l4_is_udp = false;
660
661 if (!test_bit(__QLCNIC_DEV_UP, &adapter->state)) {
662 netif_tx_stop_all_queues(netdev);
663 return NETDEV_TX_BUSY;
664 }
665
666 if (adapter->flags & QLCNIC_MACSPOOF) {
667 phdr = (struct ethhdr *)skb->data;
668 if (!ether_addr_equal(phdr->h_source, adapter->mac_addr))
669 goto drop_packet;
670 }
671
672 tx_ring = &adapter->tx_ring[skb_get_queue_mapping(skb)];
673 num_txd = tx_ring->num_desc;
674
675 frag_count = skb_shinfo(skb)->nr_frags + 1;
676
677
678
679
680 if (!skb_is_gso(skb) && frag_count > QLCNIC_MAX_FRAGS_PER_TX) {
681 for (i = 0; i < (frag_count - QLCNIC_MAX_FRAGS_PER_TX); i++)
682 delta += skb_frag_size(&skb_shinfo(skb)->frags[i]);
683
684 if (!__pskb_pull_tail(skb, delta))
685 goto drop_packet;
686
687 frag_count = 1 + skb_shinfo(skb)->nr_frags;
688 }
689
690 if (unlikely(qlcnic_tx_avail(tx_ring) <= TX_STOP_THRESH)) {
691 netif_tx_stop_queue(tx_ring->txq);
692 if (qlcnic_tx_avail(tx_ring) > TX_STOP_THRESH) {
693 netif_tx_start_queue(tx_ring->txq);
694 } else {
695 tx_ring->tx_stats.xmit_off++;
696 return NETDEV_TX_BUSY;
697 }
698 }
699
700 producer = tx_ring->producer;
701 pbuf = &tx_ring->cmd_buf_arr[producer];
702 pdev = adapter->pdev;
703 first_desc = &tx_ring->desc_head[producer];
704 hwdesc = &tx_ring->desc_head[producer];
705 qlcnic_clear_cmddesc((u64 *)hwdesc);
706
707 if (qlcnic_map_tx_skb(pdev, skb, pbuf)) {
708 adapter->stats.tx_dma_map_error++;
709 goto drop_packet;
710 }
711
712 pbuf->skb = skb;
713 pbuf->frag_count = frag_count;
714
715 qlcnic_set_tx_frags_len(first_desc, frag_count, skb->len);
716 qlcnic_set_tx_port(first_desc, adapter->portnum);
717
718 for (i = 0; i < frag_count; i++) {
719 k = i % 4;
720
721 if ((k == 0) && (i > 0)) {
722
723 producer = get_next_index(producer, num_txd);
724 hwdesc = &tx_ring->desc_head[producer];
725 qlcnic_clear_cmddesc((u64 *)hwdesc);
726 tx_ring->cmd_buf_arr[producer].skb = NULL;
727 }
728
729 buffrag = &pbuf->frag_array[i];
730 hwdesc->buffer_length[k] = cpu_to_le16(buffrag->length);
731 switch (k) {
732 case 0:
733 hwdesc->addr_buffer1 = cpu_to_le64(buffrag->dma);
734 break;
735 case 1:
736 hwdesc->addr_buffer2 = cpu_to_le64(buffrag->dma);
737 break;
738 case 2:
739 hwdesc->addr_buffer3 = cpu_to_le64(buffrag->dma);
740 break;
741 case 3:
742 hwdesc->addr_buffer4 = cpu_to_le64(buffrag->dma);
743 break;
744 }
745 }
746
747 tx_ring->producer = get_next_index(producer, num_txd);
748 smp_mb();
749
750 protocol = ntohs(skb->protocol);
751 if (protocol == ETH_P_IP)
752 l4_is_udp = ip_hdr(skb)->protocol == IPPROTO_UDP;
753 else if (protocol == ETH_P_IPV6)
754 l4_is_udp = ipv6_hdr(skb)->nexthdr == IPPROTO_UDP;
755
756
757 if (!skb->encapsulation || !l4_is_udp ||
758 !qlcnic_encap_tx_offload(adapter)) {
759 if (unlikely(qlcnic_tx_pkt(adapter, first_desc, skb,
760 tx_ring)))
761 goto unwind_buff;
762 } else {
763 if (unlikely(qlcnic_tx_encap_pkt(adapter, first_desc,
764 skb, tx_ring)))
765 goto unwind_buff;
766 }
767
768 if (adapter->drv_mac_learn)
769 qlcnic_send_filter(adapter, first_desc, skb);
770
771 tx_ring->tx_stats.tx_bytes += skb->len;
772 tx_ring->tx_stats.xmit_called++;
773
774 qlcnic_update_cmd_producer(tx_ring);
775
776 return NETDEV_TX_OK;
777
778unwind_buff:
779 qlcnic_unmap_buffers(pdev, skb, pbuf);
780drop_packet:
781 adapter->stats.txdropped++;
782 dev_kfree_skb_any(skb);
783 return NETDEV_TX_OK;
784}
785
786void qlcnic_advert_link_change(struct qlcnic_adapter *adapter, int linkup)
787{
788 struct net_device *netdev = adapter->netdev;
789
790 if (adapter->ahw->linkup && !linkup) {
791 netdev_info(netdev, "NIC Link is down\n");
792 adapter->ahw->linkup = 0;
793 netif_carrier_off(netdev);
794 } else if (!adapter->ahw->linkup && linkup) {
795 adapter->ahw->linkup = 1;
796
797
798
799
800 if (qlcnic_83xx_check(adapter) && adapter->ahw->lb_mode) {
801 netdev_info(netdev, "NIC Link is up for loopback test\n");
802 return;
803 }
804
805 netdev_info(netdev, "NIC Link is up\n");
806 netif_carrier_on(netdev);
807 }
808}
809
810static int qlcnic_alloc_rx_skb(struct qlcnic_adapter *adapter,
811 struct qlcnic_host_rds_ring *rds_ring,
812 struct qlcnic_rx_buffer *buffer)
813{
814 struct sk_buff *skb;
815 dma_addr_t dma;
816 struct pci_dev *pdev = adapter->pdev;
817
818 skb = netdev_alloc_skb(adapter->netdev, rds_ring->skb_size);
819 if (!skb) {
820 adapter->stats.skb_alloc_failure++;
821 return -ENOMEM;
822 }
823
824 skb_reserve(skb, NET_IP_ALIGN);
825 dma = pci_map_single(pdev, skb->data,
826 rds_ring->dma_size, PCI_DMA_FROMDEVICE);
827
828 if (pci_dma_mapping_error(pdev, dma)) {
829 adapter->stats.rx_dma_map_error++;
830 dev_kfree_skb_any(skb);
831 return -ENOMEM;
832 }
833
834 buffer->skb = skb;
835 buffer->dma = dma;
836
837 return 0;
838}
839
840static void qlcnic_post_rx_buffers_nodb(struct qlcnic_adapter *adapter,
841 struct qlcnic_host_rds_ring *rds_ring,
842 u8 ring_id)
843{
844 struct rcv_desc *pdesc;
845 struct qlcnic_rx_buffer *buffer;
846 int count = 0;
847 uint32_t producer, handle;
848 struct list_head *head;
849
850 if (!spin_trylock(&rds_ring->lock))
851 return;
852
853 producer = rds_ring->producer;
854 head = &rds_ring->free_list;
855 while (!list_empty(head)) {
856 buffer = list_entry(head->next, struct qlcnic_rx_buffer, list);
857
858 if (!buffer->skb) {
859 if (qlcnic_alloc_rx_skb(adapter, rds_ring, buffer))
860 break;
861 }
862 count++;
863 list_del(&buffer->list);
864
865
866 pdesc = &rds_ring->desc_head[producer];
867 handle = qlcnic_get_ref_handle(adapter,
868 buffer->ref_handle, ring_id);
869 pdesc->reference_handle = cpu_to_le16(handle);
870 pdesc->buffer_length = cpu_to_le32(rds_ring->dma_size);
871 pdesc->addr_buffer = cpu_to_le64(buffer->dma);
872 producer = get_next_index(producer, rds_ring->num_desc);
873 }
874 if (count) {
875 rds_ring->producer = producer;
876 writel((producer - 1) & (rds_ring->num_desc - 1),
877 rds_ring->crb_rcv_producer);
878 }
879 spin_unlock(&rds_ring->lock);
880}
881
882static int qlcnic_process_cmd_ring(struct qlcnic_adapter *adapter,
883 struct qlcnic_host_tx_ring *tx_ring,
884 int budget)
885{
886 u32 sw_consumer, hw_consumer;
887 int i, done, count = 0;
888 struct qlcnic_cmd_buffer *buffer;
889 struct pci_dev *pdev = adapter->pdev;
890 struct net_device *netdev = adapter->netdev;
891 struct qlcnic_skb_frag *frag;
892
893 if (!spin_trylock(&tx_ring->tx_clean_lock))
894 return 1;
895
896 sw_consumer = tx_ring->sw_consumer;
897 hw_consumer = le32_to_cpu(*(tx_ring->hw_consumer));
898
899 while (sw_consumer != hw_consumer) {
900 buffer = &tx_ring->cmd_buf_arr[sw_consumer];
901 if (buffer->skb) {
902 frag = &buffer->frag_array[0];
903 pci_unmap_single(pdev, frag->dma, frag->length,
904 PCI_DMA_TODEVICE);
905 frag->dma = 0ULL;
906 for (i = 1; i < buffer->frag_count; i++) {
907 frag++;
908 pci_unmap_page(pdev, frag->dma, frag->length,
909 PCI_DMA_TODEVICE);
910 frag->dma = 0ULL;
911 }
912 tx_ring->tx_stats.xmit_finished++;
913 dev_kfree_skb_any(buffer->skb);
914 buffer->skb = NULL;
915 }
916
917 sw_consumer = get_next_index(sw_consumer, tx_ring->num_desc);
918 if (++count >= budget)
919 break;
920 }
921
922 tx_ring->sw_consumer = sw_consumer;
923
924 if (count && netif_running(netdev)) {
925 smp_mb();
926 if (netif_tx_queue_stopped(tx_ring->txq) &&
927 netif_carrier_ok(netdev)) {
928 if (qlcnic_tx_avail(tx_ring) > TX_STOP_THRESH) {
929 netif_tx_wake_queue(tx_ring->txq);
930 tx_ring->tx_stats.xmit_on++;
931 }
932 }
933 adapter->tx_timeo_cnt = 0;
934 }
935
936
937
938
939
940
941
942
943
944
945
946
947
948 hw_consumer = le32_to_cpu(*(tx_ring->hw_consumer));
949 done = (sw_consumer == hw_consumer);
950
951 spin_unlock(&tx_ring->tx_clean_lock);
952
953 return done;
954}
955
956static int qlcnic_poll(struct napi_struct *napi, int budget)
957{
958 int tx_complete, work_done;
959 struct qlcnic_host_sds_ring *sds_ring;
960 struct qlcnic_adapter *adapter;
961 struct qlcnic_host_tx_ring *tx_ring;
962
963 sds_ring = container_of(napi, struct qlcnic_host_sds_ring, napi);
964 adapter = sds_ring->adapter;
965 tx_ring = sds_ring->tx_ring;
966
967 tx_complete = qlcnic_process_cmd_ring(adapter, tx_ring,
968 budget);
969 work_done = qlcnic_process_rcv_ring(sds_ring, budget);
970
971
972 if (!tx_complete)
973 work_done = budget;
974
975 if (work_done < budget) {
976 napi_complete(&sds_ring->napi);
977 if (test_bit(__QLCNIC_DEV_UP, &adapter->state)) {
978 qlcnic_enable_sds_intr(adapter, sds_ring);
979 qlcnic_enable_tx_intr(adapter, tx_ring);
980 }
981 }
982
983 return work_done;
984}
985
986static int qlcnic_tx_poll(struct napi_struct *napi, int budget)
987{
988 struct qlcnic_host_tx_ring *tx_ring;
989 struct qlcnic_adapter *adapter;
990 int work_done;
991
992 tx_ring = container_of(napi, struct qlcnic_host_tx_ring, napi);
993 adapter = tx_ring->adapter;
994
995 work_done = qlcnic_process_cmd_ring(adapter, tx_ring, budget);
996 if (work_done) {
997 napi_complete(&tx_ring->napi);
998 if (test_bit(__QLCNIC_DEV_UP, &adapter->state))
999 qlcnic_enable_tx_intr(adapter, tx_ring);
1000 } else {
1001
1002 work_done = budget;
1003 }
1004
1005 return work_done;
1006}
1007
1008static int qlcnic_rx_poll(struct napi_struct *napi, int budget)
1009{
1010 struct qlcnic_host_sds_ring *sds_ring;
1011 struct qlcnic_adapter *adapter;
1012 int work_done;
1013
1014 sds_ring = container_of(napi, struct qlcnic_host_sds_ring, napi);
1015 adapter = sds_ring->adapter;
1016
1017 work_done = qlcnic_process_rcv_ring(sds_ring, budget);
1018
1019 if (work_done < budget) {
1020 napi_complete(&sds_ring->napi);
1021 if (test_bit(__QLCNIC_DEV_UP, &adapter->state))
1022 qlcnic_enable_sds_intr(adapter, sds_ring);
1023 }
1024
1025 return work_done;
1026}
1027
1028static void qlcnic_handle_linkevent(struct qlcnic_adapter *adapter,
1029 struct qlcnic_fw_msg *msg)
1030{
1031 u32 cable_OUI;
1032 u16 cable_len, link_speed;
1033 u8 link_status, module, duplex, autoneg, lb_status = 0;
1034 struct net_device *netdev = adapter->netdev;
1035
1036 adapter->ahw->has_link_events = 1;
1037
1038 cable_OUI = msg->body[1] & 0xffffffff;
1039 cable_len = (msg->body[1] >> 32) & 0xffff;
1040 link_speed = (msg->body[1] >> 48) & 0xffff;
1041
1042 link_status = msg->body[2] & 0xff;
1043 duplex = (msg->body[2] >> 16) & 0xff;
1044 autoneg = (msg->body[2] >> 24) & 0xff;
1045 lb_status = (msg->body[2] >> 32) & 0x3;
1046
1047 module = (msg->body[2] >> 8) & 0xff;
1048 if (module == LINKEVENT_MODULE_TWINAX_UNSUPPORTED_CABLE)
1049 dev_info(&netdev->dev,
1050 "unsupported cable: OUI 0x%x, length %d\n",
1051 cable_OUI, cable_len);
1052 else if (module == LINKEVENT_MODULE_TWINAX_UNSUPPORTED_CABLELEN)
1053 dev_info(&netdev->dev, "unsupported cable length %d\n",
1054 cable_len);
1055
1056 if (!link_status && (lb_status == QLCNIC_ILB_MODE ||
1057 lb_status == QLCNIC_ELB_MODE))
1058 adapter->ahw->loopback_state |= QLCNIC_LINKEVENT;
1059
1060 qlcnic_advert_link_change(adapter, link_status);
1061
1062 if (duplex == LINKEVENT_FULL_DUPLEX)
1063 adapter->ahw->link_duplex = DUPLEX_FULL;
1064 else
1065 adapter->ahw->link_duplex = DUPLEX_HALF;
1066
1067 adapter->ahw->module_type = module;
1068 adapter->ahw->link_autoneg = autoneg;
1069
1070 if (link_status) {
1071 adapter->ahw->link_speed = link_speed;
1072 } else {
1073 adapter->ahw->link_speed = SPEED_UNKNOWN;
1074 adapter->ahw->link_duplex = DUPLEX_UNKNOWN;
1075 }
1076}
1077
1078static void qlcnic_handle_fw_message(int desc_cnt, int index,
1079 struct qlcnic_host_sds_ring *sds_ring)
1080{
1081 struct qlcnic_fw_msg msg;
1082 struct status_desc *desc;
1083 struct qlcnic_adapter *adapter;
1084 struct device *dev;
1085 int i = 0, opcode, ret;
1086
1087 while (desc_cnt > 0 && i < 8) {
1088 desc = &sds_ring->desc_head[index];
1089 msg.words[i++] = le64_to_cpu(desc->status_desc_data[0]);
1090 msg.words[i++] = le64_to_cpu(desc->status_desc_data[1]);
1091
1092 index = get_next_index(index, sds_ring->num_desc);
1093 desc_cnt--;
1094 }
1095
1096 adapter = sds_ring->adapter;
1097 dev = &adapter->pdev->dev;
1098 opcode = qlcnic_get_nic_msg_opcode(msg.body[0]);
1099
1100 switch (opcode) {
1101 case QLCNIC_C2H_OPCODE_GET_LINKEVENT_RESPONSE:
1102 qlcnic_handle_linkevent(adapter, &msg);
1103 break;
1104 case QLCNIC_C2H_OPCODE_CONFIG_LOOPBACK:
1105 ret = (u32)(msg.body[1]);
1106 switch (ret) {
1107 case 0:
1108 adapter->ahw->loopback_state |= QLCNIC_LB_RESPONSE;
1109 break;
1110 case 1:
1111 dev_info(dev, "loopback already in progress\n");
1112 adapter->ahw->diag_cnt = -EINPROGRESS;
1113 break;
1114 case 2:
1115 dev_info(dev, "loopback cable is not connected\n");
1116 adapter->ahw->diag_cnt = -ENODEV;
1117 break;
1118 default:
1119 dev_info(dev,
1120 "loopback configure request failed, err %x\n",
1121 ret);
1122 adapter->ahw->diag_cnt = -EIO;
1123 break;
1124 }
1125 break;
1126 case QLCNIC_C2H_OPCODE_GET_DCB_AEN:
1127 qlcnic_dcb_aen_handler(adapter->dcb, (void *)&msg);
1128 break;
1129 default:
1130 break;
1131 }
1132}
1133
1134static struct sk_buff *qlcnic_process_rxbuf(struct qlcnic_adapter *adapter,
1135 struct qlcnic_host_rds_ring *ring,
1136 u16 index, u16 cksum)
1137{
1138 struct qlcnic_rx_buffer *buffer;
1139 struct sk_buff *skb;
1140
1141 buffer = &ring->rx_buf_arr[index];
1142 if (unlikely(buffer->skb == NULL)) {
1143 WARN_ON(1);
1144 return NULL;
1145 }
1146
1147 pci_unmap_single(adapter->pdev, buffer->dma, ring->dma_size,
1148 PCI_DMA_FROMDEVICE);
1149
1150 skb = buffer->skb;
1151 if (likely((adapter->netdev->features & NETIF_F_RXCSUM) &&
1152 (cksum == STATUS_CKSUM_OK || cksum == STATUS_CKSUM_LOOP))) {
1153 adapter->stats.csummed++;
1154 skb->ip_summed = CHECKSUM_UNNECESSARY;
1155 } else {
1156 skb_checksum_none_assert(skb);
1157 }
1158
1159
1160 buffer->skb = NULL;
1161
1162 return skb;
1163}
1164
1165static inline int qlcnic_check_rx_tagging(struct qlcnic_adapter *adapter,
1166 struct sk_buff *skb, u16 *vlan_tag)
1167{
1168 struct ethhdr *eth_hdr;
1169
1170 if (!__vlan_get_tag(skb, vlan_tag)) {
1171 eth_hdr = (struct ethhdr *)skb->data;
1172 memmove(skb->data + VLAN_HLEN, eth_hdr, ETH_ALEN * 2);
1173 skb_pull(skb, VLAN_HLEN);
1174 }
1175 if (!adapter->rx_pvid)
1176 return 0;
1177
1178 if (*vlan_tag == adapter->rx_pvid) {
1179
1180 *vlan_tag = 0xffff;
1181 return 0;
1182 }
1183 if (adapter->flags & QLCNIC_TAGGING_ENABLED)
1184 return 0;
1185
1186 return -EINVAL;
1187}
1188
1189static struct qlcnic_rx_buffer *
1190qlcnic_process_rcv(struct qlcnic_adapter *adapter,
1191 struct qlcnic_host_sds_ring *sds_ring, int ring,
1192 u64 sts_data0)
1193{
1194 struct net_device *netdev = adapter->netdev;
1195 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1196 struct qlcnic_rx_buffer *buffer;
1197 struct sk_buff *skb;
1198 struct qlcnic_host_rds_ring *rds_ring;
1199 int index, length, cksum, pkt_offset, is_lb_pkt;
1200 u16 vid = 0xffff, t_vid;
1201
1202 if (unlikely(ring >= adapter->max_rds_rings))
1203 return NULL;
1204
1205 rds_ring = &recv_ctx->rds_rings[ring];
1206
1207 index = qlcnic_get_sts_refhandle(sts_data0);
1208 if (unlikely(index >= rds_ring->num_desc))
1209 return NULL;
1210
1211 buffer = &rds_ring->rx_buf_arr[index];
1212 length = qlcnic_get_sts_totallength(sts_data0);
1213 cksum = qlcnic_get_sts_status(sts_data0);
1214 pkt_offset = qlcnic_get_sts_pkt_offset(sts_data0);
1215
1216 skb = qlcnic_process_rxbuf(adapter, rds_ring, index, cksum);
1217 if (!skb)
1218 return buffer;
1219
1220 if (adapter->rx_mac_learn) {
1221 t_vid = 0;
1222 is_lb_pkt = qlcnic_82xx_is_lb_pkt(sts_data0);
1223 qlcnic_add_lb_filter(adapter, skb, is_lb_pkt, t_vid);
1224 }
1225
1226 if (length > rds_ring->skb_size)
1227 skb_put(skb, rds_ring->skb_size);
1228 else
1229 skb_put(skb, length);
1230
1231 if (pkt_offset)
1232 skb_pull(skb, pkt_offset);
1233
1234 if (unlikely(qlcnic_check_rx_tagging(adapter, skb, &vid))) {
1235 adapter->stats.rxdropped++;
1236 dev_kfree_skb(skb);
1237 return buffer;
1238 }
1239
1240 skb->protocol = eth_type_trans(skb, netdev);
1241
1242 if (vid != 0xffff)
1243 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid);
1244
1245 napi_gro_receive(&sds_ring->napi, skb);
1246
1247 adapter->stats.rx_pkts++;
1248 adapter->stats.rxbytes += length;
1249
1250 return buffer;
1251}
1252
1253#define QLC_TCP_HDR_SIZE 20
1254#define QLC_TCP_TS_OPTION_SIZE 12
1255#define QLC_TCP_TS_HDR_SIZE (QLC_TCP_HDR_SIZE + QLC_TCP_TS_OPTION_SIZE)
1256
1257static struct qlcnic_rx_buffer *
1258qlcnic_process_lro(struct qlcnic_adapter *adapter,
1259 int ring, u64 sts_data0, u64 sts_data1)
1260{
1261 struct net_device *netdev = adapter->netdev;
1262 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1263 struct qlcnic_rx_buffer *buffer;
1264 struct sk_buff *skb;
1265 struct qlcnic_host_rds_ring *rds_ring;
1266 struct iphdr *iph;
1267 struct ipv6hdr *ipv6h;
1268 struct tcphdr *th;
1269 bool push, timestamp;
1270 int index, l2_hdr_offset, l4_hdr_offset, is_lb_pkt;
1271 u16 lro_length, length, data_offset, t_vid, vid = 0xffff;
1272 u32 seq_number;
1273
1274 if (unlikely(ring >= adapter->max_rds_rings))
1275 return NULL;
1276
1277 rds_ring = &recv_ctx->rds_rings[ring];
1278
1279 index = qlcnic_get_lro_sts_refhandle(sts_data0);
1280 if (unlikely(index >= rds_ring->num_desc))
1281 return NULL;
1282
1283 buffer = &rds_ring->rx_buf_arr[index];
1284
1285 timestamp = qlcnic_get_lro_sts_timestamp(sts_data0);
1286 lro_length = qlcnic_get_lro_sts_length(sts_data0);
1287 l2_hdr_offset = qlcnic_get_lro_sts_l2_hdr_offset(sts_data0);
1288 l4_hdr_offset = qlcnic_get_lro_sts_l4_hdr_offset(sts_data0);
1289 push = qlcnic_get_lro_sts_push_flag(sts_data0);
1290 seq_number = qlcnic_get_lro_sts_seq_number(sts_data1);
1291
1292 skb = qlcnic_process_rxbuf(adapter, rds_ring, index, STATUS_CKSUM_OK);
1293 if (!skb)
1294 return buffer;
1295
1296 if (adapter->rx_mac_learn) {
1297 t_vid = 0;
1298 is_lb_pkt = qlcnic_82xx_is_lb_pkt(sts_data0);
1299 qlcnic_add_lb_filter(adapter, skb, is_lb_pkt, t_vid);
1300 }
1301
1302 if (timestamp)
1303 data_offset = l4_hdr_offset + QLC_TCP_TS_HDR_SIZE;
1304 else
1305 data_offset = l4_hdr_offset + QLC_TCP_HDR_SIZE;
1306
1307 skb_put(skb, lro_length + data_offset);
1308 skb_pull(skb, l2_hdr_offset);
1309
1310 if (unlikely(qlcnic_check_rx_tagging(adapter, skb, &vid))) {
1311 adapter->stats.rxdropped++;
1312 dev_kfree_skb(skb);
1313 return buffer;
1314 }
1315
1316 skb->protocol = eth_type_trans(skb, netdev);
1317
1318 if (ntohs(skb->protocol) == ETH_P_IPV6) {
1319 ipv6h = (struct ipv6hdr *)skb->data;
1320 th = (struct tcphdr *)(skb->data + sizeof(struct ipv6hdr));
1321 length = (th->doff << 2) + lro_length;
1322 ipv6h->payload_len = htons(length);
1323 } else {
1324 iph = (struct iphdr *)skb->data;
1325 th = (struct tcphdr *)(skb->data + (iph->ihl << 2));
1326 length = (iph->ihl << 2) + (th->doff << 2) + lro_length;
1327 csum_replace2(&iph->check, iph->tot_len, htons(length));
1328 iph->tot_len = htons(length);
1329 }
1330
1331 th->psh = push;
1332 th->seq = htonl(seq_number);
1333 length = skb->len;
1334
1335 if (adapter->flags & QLCNIC_FW_LRO_MSS_CAP) {
1336 skb_shinfo(skb)->gso_size = qlcnic_get_lro_sts_mss(sts_data1);
1337 if (skb->protocol == htons(ETH_P_IPV6))
1338 skb_shinfo(skb)->gso_type = SKB_GSO_TCPV6;
1339 else
1340 skb_shinfo(skb)->gso_type = SKB_GSO_TCPV4;
1341 }
1342
1343 if (vid != 0xffff)
1344 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid);
1345 netif_receive_skb(skb);
1346
1347 adapter->stats.lro_pkts++;
1348 adapter->stats.lrobytes += length;
1349
1350 return buffer;
1351}
1352
1353static int qlcnic_process_rcv_ring(struct qlcnic_host_sds_ring *sds_ring, int max)
1354{
1355 struct qlcnic_host_rds_ring *rds_ring;
1356 struct qlcnic_adapter *adapter = sds_ring->adapter;
1357 struct list_head *cur;
1358 struct status_desc *desc;
1359 struct qlcnic_rx_buffer *rxbuf;
1360 int opcode, desc_cnt, count = 0;
1361 u64 sts_data0, sts_data1;
1362 u8 ring;
1363 u32 consumer = sds_ring->consumer;
1364
1365 while (count < max) {
1366 desc = &sds_ring->desc_head[consumer];
1367 sts_data0 = le64_to_cpu(desc->status_desc_data[0]);
1368
1369 if (!(sts_data0 & STATUS_OWNER_HOST))
1370 break;
1371
1372 desc_cnt = qlcnic_get_sts_desc_cnt(sts_data0);
1373 opcode = qlcnic_get_sts_opcode(sts_data0);
1374 switch (opcode) {
1375 case QLCNIC_RXPKT_DESC:
1376 case QLCNIC_OLD_RXPKT_DESC:
1377 case QLCNIC_SYN_OFFLOAD:
1378 ring = qlcnic_get_sts_type(sts_data0);
1379 rxbuf = qlcnic_process_rcv(adapter, sds_ring, ring,
1380 sts_data0);
1381 break;
1382 case QLCNIC_LRO_DESC:
1383 ring = qlcnic_get_lro_sts_type(sts_data0);
1384 sts_data1 = le64_to_cpu(desc->status_desc_data[1]);
1385 rxbuf = qlcnic_process_lro(adapter, ring, sts_data0,
1386 sts_data1);
1387 break;
1388 case QLCNIC_RESPONSE_DESC:
1389 qlcnic_handle_fw_message(desc_cnt, consumer, sds_ring);
1390 default:
1391 goto skip;
1392 }
1393 WARN_ON(desc_cnt > 1);
1394
1395 if (likely(rxbuf))
1396 list_add_tail(&rxbuf->list, &sds_ring->free_list[ring]);
1397 else
1398 adapter->stats.null_rxbuf++;
1399skip:
1400 for (; desc_cnt > 0; desc_cnt--) {
1401 desc = &sds_ring->desc_head[consumer];
1402 desc->status_desc_data[0] = QLCNIC_DESC_OWNER_FW;
1403 consumer = get_next_index(consumer, sds_ring->num_desc);
1404 }
1405 count++;
1406 }
1407
1408 for (ring = 0; ring < adapter->max_rds_rings; ring++) {
1409 rds_ring = &adapter->recv_ctx->rds_rings[ring];
1410 if (!list_empty(&sds_ring->free_list[ring])) {
1411 list_for_each(cur, &sds_ring->free_list[ring]) {
1412 rxbuf = list_entry(cur, struct qlcnic_rx_buffer,
1413 list);
1414 qlcnic_alloc_rx_skb(adapter, rds_ring, rxbuf);
1415 }
1416 spin_lock(&rds_ring->lock);
1417 list_splice_tail_init(&sds_ring->free_list[ring],
1418 &rds_ring->free_list);
1419 spin_unlock(&rds_ring->lock);
1420 }
1421
1422 qlcnic_post_rx_buffers_nodb(adapter, rds_ring, ring);
1423 }
1424
1425 if (count) {
1426 sds_ring->consumer = consumer;
1427 writel(consumer, sds_ring->crb_sts_consumer);
1428 }
1429
1430 return count;
1431}
1432
1433void qlcnic_post_rx_buffers(struct qlcnic_adapter *adapter,
1434 struct qlcnic_host_rds_ring *rds_ring, u8 ring_id)
1435{
1436 struct rcv_desc *pdesc;
1437 struct qlcnic_rx_buffer *buffer;
1438 int count = 0;
1439 u32 producer, handle;
1440 struct list_head *head;
1441
1442 producer = rds_ring->producer;
1443 head = &rds_ring->free_list;
1444
1445 while (!list_empty(head)) {
1446
1447 buffer = list_entry(head->next, struct qlcnic_rx_buffer, list);
1448
1449 if (!buffer->skb) {
1450 if (qlcnic_alloc_rx_skb(adapter, rds_ring, buffer))
1451 break;
1452 }
1453
1454 count++;
1455 list_del(&buffer->list);
1456
1457
1458 pdesc = &rds_ring->desc_head[producer];
1459 pdesc->addr_buffer = cpu_to_le64(buffer->dma);
1460 handle = qlcnic_get_ref_handle(adapter, buffer->ref_handle,
1461 ring_id);
1462 pdesc->reference_handle = cpu_to_le16(handle);
1463 pdesc->buffer_length = cpu_to_le32(rds_ring->dma_size);
1464 producer = get_next_index(producer, rds_ring->num_desc);
1465 }
1466
1467 if (count) {
1468 rds_ring->producer = producer;
1469 writel((producer-1) & (rds_ring->num_desc-1),
1470 rds_ring->crb_rcv_producer);
1471 }
1472}
1473
1474static void dump_skb(struct sk_buff *skb, struct qlcnic_adapter *adapter)
1475{
1476 int i;
1477 unsigned char *data = skb->data;
1478
1479 pr_info(KERN_INFO "\n");
1480 for (i = 0; i < skb->len; i++) {
1481 QLCDB(adapter, DRV, "%02x ", data[i]);
1482 if ((i & 0x0f) == 8)
1483 pr_info(KERN_INFO "\n");
1484 }
1485}
1486
1487static void qlcnic_process_rcv_diag(struct qlcnic_adapter *adapter, int ring,
1488 u64 sts_data0)
1489{
1490 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1491 struct sk_buff *skb;
1492 struct qlcnic_host_rds_ring *rds_ring;
1493 int index, length, cksum, pkt_offset;
1494
1495 if (unlikely(ring >= adapter->max_rds_rings))
1496 return;
1497
1498 rds_ring = &recv_ctx->rds_rings[ring];
1499
1500 index = qlcnic_get_sts_refhandle(sts_data0);
1501 length = qlcnic_get_sts_totallength(sts_data0);
1502 if (unlikely(index >= rds_ring->num_desc))
1503 return;
1504
1505 cksum = qlcnic_get_sts_status(sts_data0);
1506 pkt_offset = qlcnic_get_sts_pkt_offset(sts_data0);
1507
1508 skb = qlcnic_process_rxbuf(adapter, rds_ring, index, cksum);
1509 if (!skb)
1510 return;
1511
1512 if (length > rds_ring->skb_size)
1513 skb_put(skb, rds_ring->skb_size);
1514 else
1515 skb_put(skb, length);
1516
1517 if (pkt_offset)
1518 skb_pull(skb, pkt_offset);
1519
1520 if (!qlcnic_check_loopback_buff(skb->data, adapter->mac_addr))
1521 adapter->ahw->diag_cnt++;
1522 else
1523 dump_skb(skb, adapter);
1524
1525 dev_kfree_skb_any(skb);
1526 adapter->stats.rx_pkts++;
1527 adapter->stats.rxbytes += length;
1528
1529 return;
1530}
1531
1532void qlcnic_82xx_process_rcv_ring_diag(struct qlcnic_host_sds_ring *sds_ring)
1533{
1534 struct qlcnic_adapter *adapter = sds_ring->adapter;
1535 struct status_desc *desc;
1536 u64 sts_data0;
1537 int ring, opcode, desc_cnt;
1538
1539 u32 consumer = sds_ring->consumer;
1540
1541 desc = &sds_ring->desc_head[consumer];
1542 sts_data0 = le64_to_cpu(desc->status_desc_data[0]);
1543
1544 if (!(sts_data0 & STATUS_OWNER_HOST))
1545 return;
1546
1547 desc_cnt = qlcnic_get_sts_desc_cnt(sts_data0);
1548 opcode = qlcnic_get_sts_opcode(sts_data0);
1549 switch (opcode) {
1550 case QLCNIC_RESPONSE_DESC:
1551 qlcnic_handle_fw_message(desc_cnt, consumer, sds_ring);
1552 break;
1553 default:
1554 ring = qlcnic_get_sts_type(sts_data0);
1555 qlcnic_process_rcv_diag(adapter, ring, sts_data0);
1556 break;
1557 }
1558
1559 for (; desc_cnt > 0; desc_cnt--) {
1560 desc = &sds_ring->desc_head[consumer];
1561 desc->status_desc_data[0] = cpu_to_le64(STATUS_OWNER_PHANTOM);
1562 consumer = get_next_index(consumer, sds_ring->num_desc);
1563 }
1564
1565 sds_ring->consumer = consumer;
1566 writel(consumer, sds_ring->crb_sts_consumer);
1567}
1568
1569int qlcnic_82xx_napi_add(struct qlcnic_adapter *adapter,
1570 struct net_device *netdev)
1571{
1572 int ring;
1573 struct qlcnic_host_sds_ring *sds_ring;
1574 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1575 struct qlcnic_host_tx_ring *tx_ring;
1576
1577 if (qlcnic_alloc_sds_rings(recv_ctx, adapter->drv_sds_rings))
1578 return -ENOMEM;
1579
1580 for (ring = 0; ring < adapter->drv_sds_rings; ring++) {
1581 sds_ring = &recv_ctx->sds_rings[ring];
1582 if (qlcnic_check_multi_tx(adapter) &&
1583 !adapter->ahw->diag_test) {
1584 netif_napi_add(netdev, &sds_ring->napi, qlcnic_rx_poll,
1585 NAPI_POLL_WEIGHT);
1586 } else {
1587 if (ring == (adapter->drv_sds_rings - 1))
1588 netif_napi_add(netdev, &sds_ring->napi,
1589 qlcnic_poll,
1590 NAPI_POLL_WEIGHT);
1591 else
1592 netif_napi_add(netdev, &sds_ring->napi,
1593 qlcnic_rx_poll,
1594 NAPI_POLL_WEIGHT);
1595 }
1596 }
1597
1598 if (qlcnic_alloc_tx_rings(adapter, netdev)) {
1599 qlcnic_free_sds_rings(recv_ctx);
1600 return -ENOMEM;
1601 }
1602
1603 if (qlcnic_check_multi_tx(adapter) && !adapter->ahw->diag_test) {
1604 for (ring = 0; ring < adapter->drv_tx_rings; ring++) {
1605 tx_ring = &adapter->tx_ring[ring];
1606 netif_napi_add(netdev, &tx_ring->napi, qlcnic_tx_poll,
1607 NAPI_POLL_WEIGHT);
1608 }
1609 }
1610
1611 return 0;
1612}
1613
1614void qlcnic_82xx_napi_del(struct qlcnic_adapter *adapter)
1615{
1616 int ring;
1617 struct qlcnic_host_sds_ring *sds_ring;
1618 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1619 struct qlcnic_host_tx_ring *tx_ring;
1620
1621 for (ring = 0; ring < adapter->drv_sds_rings; ring++) {
1622 sds_ring = &recv_ctx->sds_rings[ring];
1623 netif_napi_del(&sds_ring->napi);
1624 }
1625
1626 qlcnic_free_sds_rings(adapter->recv_ctx);
1627
1628 if (qlcnic_check_multi_tx(adapter) && !adapter->ahw->diag_test) {
1629 for (ring = 0; ring < adapter->drv_tx_rings; ring++) {
1630 tx_ring = &adapter->tx_ring[ring];
1631 netif_napi_del(&tx_ring->napi);
1632 }
1633 }
1634
1635 qlcnic_free_tx_rings(adapter);
1636}
1637
1638void qlcnic_82xx_napi_enable(struct qlcnic_adapter *adapter)
1639{
1640 int ring;
1641 struct qlcnic_host_sds_ring *sds_ring;
1642 struct qlcnic_host_tx_ring *tx_ring;
1643 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1644
1645 if (adapter->is_up != QLCNIC_ADAPTER_UP_MAGIC)
1646 return;
1647
1648 for (ring = 0; ring < adapter->drv_sds_rings; ring++) {
1649 sds_ring = &recv_ctx->sds_rings[ring];
1650 napi_enable(&sds_ring->napi);
1651 qlcnic_enable_sds_intr(adapter, sds_ring);
1652 }
1653
1654 if (qlcnic_check_multi_tx(adapter) &&
1655 (adapter->flags & QLCNIC_MSIX_ENABLED) &&
1656 !adapter->ahw->diag_test) {
1657 for (ring = 0; ring < adapter->drv_tx_rings; ring++) {
1658 tx_ring = &adapter->tx_ring[ring];
1659 napi_enable(&tx_ring->napi);
1660 qlcnic_enable_tx_intr(adapter, tx_ring);
1661 }
1662 }
1663}
1664
1665void qlcnic_82xx_napi_disable(struct qlcnic_adapter *adapter)
1666{
1667 int ring;
1668 struct qlcnic_host_sds_ring *sds_ring;
1669 struct qlcnic_host_tx_ring *tx_ring;
1670 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1671
1672 if (adapter->is_up != QLCNIC_ADAPTER_UP_MAGIC)
1673 return;
1674
1675 for (ring = 0; ring < adapter->drv_sds_rings; ring++) {
1676 sds_ring = &recv_ctx->sds_rings[ring];
1677 qlcnic_disable_sds_intr(adapter, sds_ring);
1678 napi_synchronize(&sds_ring->napi);
1679 napi_disable(&sds_ring->napi);
1680 }
1681
1682 if ((adapter->flags & QLCNIC_MSIX_ENABLED) &&
1683 !adapter->ahw->diag_test &&
1684 qlcnic_check_multi_tx(adapter)) {
1685 for (ring = 0; ring < adapter->drv_tx_rings; ring++) {
1686 tx_ring = &adapter->tx_ring[ring];
1687 qlcnic_disable_tx_intr(adapter, tx_ring);
1688 napi_synchronize(&tx_ring->napi);
1689 napi_disable(&tx_ring->napi);
1690 }
1691 }
1692}
1693
1694#define QLC_83XX_NORMAL_LB_PKT (1ULL << 36)
1695#define QLC_83XX_LRO_LB_PKT (1ULL << 46)
1696
1697static inline int qlcnic_83xx_is_lb_pkt(u64 sts_data, int lro_pkt)
1698{
1699 if (lro_pkt)
1700 return (sts_data & QLC_83XX_LRO_LB_PKT) ? 1 : 0;
1701 else
1702 return (sts_data & QLC_83XX_NORMAL_LB_PKT) ? 1 : 0;
1703}
1704
1705#define QLCNIC_ENCAP_LENGTH_MASK 0x7f
1706
1707static inline u8 qlcnic_encap_length(u64 sts_data)
1708{
1709 return sts_data & QLCNIC_ENCAP_LENGTH_MASK;
1710}
1711
1712static struct qlcnic_rx_buffer *
1713qlcnic_83xx_process_rcv(struct qlcnic_adapter *adapter,
1714 struct qlcnic_host_sds_ring *sds_ring,
1715 u8 ring, u64 sts_data[])
1716{
1717 struct net_device *netdev = adapter->netdev;
1718 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1719 struct qlcnic_rx_buffer *buffer;
1720 struct sk_buff *skb;
1721 struct qlcnic_host_rds_ring *rds_ring;
1722 int index, length, cksum, is_lb_pkt;
1723 u16 vid = 0xffff;
1724 int err;
1725
1726 if (unlikely(ring >= adapter->max_rds_rings))
1727 return NULL;
1728
1729 rds_ring = &recv_ctx->rds_rings[ring];
1730
1731 index = qlcnic_83xx_hndl(sts_data[0]);
1732 if (unlikely(index >= rds_ring->num_desc))
1733 return NULL;
1734
1735 buffer = &rds_ring->rx_buf_arr[index];
1736 length = qlcnic_83xx_pktln(sts_data[0]);
1737 cksum = qlcnic_83xx_csum_status(sts_data[1]);
1738 skb = qlcnic_process_rxbuf(adapter, rds_ring, index, cksum);
1739 if (!skb)
1740 return buffer;
1741
1742 if (length > rds_ring->skb_size)
1743 skb_put(skb, rds_ring->skb_size);
1744 else
1745 skb_put(skb, length);
1746
1747 err = qlcnic_check_rx_tagging(adapter, skb, &vid);
1748
1749 if (adapter->rx_mac_learn) {
1750 is_lb_pkt = qlcnic_83xx_is_lb_pkt(sts_data[1], 0);
1751 qlcnic_add_lb_filter(adapter, skb, is_lb_pkt, vid);
1752 }
1753
1754 if (unlikely(err)) {
1755 adapter->stats.rxdropped++;
1756 dev_kfree_skb(skb);
1757 return buffer;
1758 }
1759
1760 skb->protocol = eth_type_trans(skb, netdev);
1761
1762 if (qlcnic_encap_length(sts_data[1]) &&
1763 skb->ip_summed == CHECKSUM_UNNECESSARY) {
1764 skb->csum_level = 1;
1765 adapter->stats.encap_rx_csummed++;
1766 }
1767
1768 if (vid != 0xffff)
1769 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid);
1770
1771 napi_gro_receive(&sds_ring->napi, skb);
1772
1773 adapter->stats.rx_pkts++;
1774 adapter->stats.rxbytes += length;
1775
1776 return buffer;
1777}
1778
1779static struct qlcnic_rx_buffer *
1780qlcnic_83xx_process_lro(struct qlcnic_adapter *adapter,
1781 u8 ring, u64 sts_data[])
1782{
1783 struct net_device *netdev = adapter->netdev;
1784 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1785 struct qlcnic_rx_buffer *buffer;
1786 struct sk_buff *skb;
1787 struct qlcnic_host_rds_ring *rds_ring;
1788 struct iphdr *iph;
1789 struct ipv6hdr *ipv6h;
1790 struct tcphdr *th;
1791 bool push;
1792 int l2_hdr_offset, l4_hdr_offset;
1793 int index, is_lb_pkt;
1794 u16 lro_length, length, data_offset, gso_size;
1795 u16 vid = 0xffff;
1796 int err;
1797
1798 if (unlikely(ring >= adapter->max_rds_rings))
1799 return NULL;
1800
1801 rds_ring = &recv_ctx->rds_rings[ring];
1802
1803 index = qlcnic_83xx_hndl(sts_data[0]);
1804 if (unlikely(index >= rds_ring->num_desc))
1805 return NULL;
1806
1807 buffer = &rds_ring->rx_buf_arr[index];
1808
1809 lro_length = qlcnic_83xx_lro_pktln(sts_data[0]);
1810 l2_hdr_offset = qlcnic_83xx_l2_hdr_off(sts_data[1]);
1811 l4_hdr_offset = qlcnic_83xx_l4_hdr_off(sts_data[1]);
1812 push = qlcnic_83xx_is_psh_bit(sts_data[1]);
1813
1814 skb = qlcnic_process_rxbuf(adapter, rds_ring, index, STATUS_CKSUM_OK);
1815 if (!skb)
1816 return buffer;
1817
1818 if (qlcnic_83xx_is_tstamp(sts_data[1]))
1819 data_offset = l4_hdr_offset + QLCNIC_TCP_TS_HDR_SIZE;
1820 else
1821 data_offset = l4_hdr_offset + QLCNIC_TCP_HDR_SIZE;
1822
1823 skb_put(skb, lro_length + data_offset);
1824 skb_pull(skb, l2_hdr_offset);
1825
1826 err = qlcnic_check_rx_tagging(adapter, skb, &vid);
1827
1828 if (adapter->rx_mac_learn) {
1829 is_lb_pkt = qlcnic_83xx_is_lb_pkt(sts_data[1], 1);
1830 qlcnic_add_lb_filter(adapter, skb, is_lb_pkt, vid);
1831 }
1832
1833 if (unlikely(err)) {
1834 adapter->stats.rxdropped++;
1835 dev_kfree_skb(skb);
1836 return buffer;
1837 }
1838
1839 skb->protocol = eth_type_trans(skb, netdev);
1840 if (ntohs(skb->protocol) == ETH_P_IPV6) {
1841 ipv6h = (struct ipv6hdr *)skb->data;
1842 th = (struct tcphdr *)(skb->data + sizeof(struct ipv6hdr));
1843
1844 length = (th->doff << 2) + lro_length;
1845 ipv6h->payload_len = htons(length);
1846 } else {
1847 iph = (struct iphdr *)skb->data;
1848 th = (struct tcphdr *)(skb->data + (iph->ihl << 2));
1849 length = (iph->ihl << 2) + (th->doff << 2) + lro_length;
1850 csum_replace2(&iph->check, iph->tot_len, htons(length));
1851 iph->tot_len = htons(length);
1852 }
1853
1854 th->psh = push;
1855 length = skb->len;
1856
1857 if (adapter->flags & QLCNIC_FW_LRO_MSS_CAP) {
1858 gso_size = qlcnic_83xx_get_lro_sts_mss(sts_data[0]);
1859 skb_shinfo(skb)->gso_size = gso_size;
1860 if (skb->protocol == htons(ETH_P_IPV6))
1861 skb_shinfo(skb)->gso_type = SKB_GSO_TCPV6;
1862 else
1863 skb_shinfo(skb)->gso_type = SKB_GSO_TCPV4;
1864 }
1865
1866 if (vid != 0xffff)
1867 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid);
1868
1869 netif_receive_skb(skb);
1870
1871 adapter->stats.lro_pkts++;
1872 adapter->stats.lrobytes += length;
1873 return buffer;
1874}
1875
1876static int qlcnic_83xx_process_rcv_ring(struct qlcnic_host_sds_ring *sds_ring,
1877 int max)
1878{
1879 struct qlcnic_host_rds_ring *rds_ring;
1880 struct qlcnic_adapter *adapter = sds_ring->adapter;
1881 struct list_head *cur;
1882 struct status_desc *desc;
1883 struct qlcnic_rx_buffer *rxbuf = NULL;
1884 u8 ring;
1885 u64 sts_data[2];
1886 int count = 0, opcode;
1887 u32 consumer = sds_ring->consumer;
1888
1889 while (count < max) {
1890 desc = &sds_ring->desc_head[consumer];
1891 sts_data[1] = le64_to_cpu(desc->status_desc_data[1]);
1892 opcode = qlcnic_83xx_opcode(sts_data[1]);
1893 if (!opcode)
1894 break;
1895 sts_data[0] = le64_to_cpu(desc->status_desc_data[0]);
1896 ring = QLCNIC_FETCH_RING_ID(sts_data[0]);
1897
1898 switch (opcode) {
1899 case QLC_83XX_REG_DESC:
1900 rxbuf = qlcnic_83xx_process_rcv(adapter, sds_ring,
1901 ring, sts_data);
1902 break;
1903 case QLC_83XX_LRO_DESC:
1904 rxbuf = qlcnic_83xx_process_lro(adapter, ring,
1905 sts_data);
1906 break;
1907 default:
1908 dev_info(&adapter->pdev->dev,
1909 "Unknown opcode: 0x%x\n", opcode);
1910 goto skip;
1911 }
1912
1913 if (likely(rxbuf))
1914 list_add_tail(&rxbuf->list, &sds_ring->free_list[ring]);
1915 else
1916 adapter->stats.null_rxbuf++;
1917skip:
1918 desc = &sds_ring->desc_head[consumer];
1919
1920 desc->status_desc_data[1] = 0;
1921 consumer = get_next_index(consumer, sds_ring->num_desc);
1922 count++;
1923 }
1924 for (ring = 0; ring < adapter->max_rds_rings; ring++) {
1925 rds_ring = &adapter->recv_ctx->rds_rings[ring];
1926 if (!list_empty(&sds_ring->free_list[ring])) {
1927 list_for_each(cur, &sds_ring->free_list[ring]) {
1928 rxbuf = list_entry(cur, struct qlcnic_rx_buffer,
1929 list);
1930 qlcnic_alloc_rx_skb(adapter, rds_ring, rxbuf);
1931 }
1932 spin_lock(&rds_ring->lock);
1933 list_splice_tail_init(&sds_ring->free_list[ring],
1934 &rds_ring->free_list);
1935 spin_unlock(&rds_ring->lock);
1936 }
1937 qlcnic_post_rx_buffers_nodb(adapter, rds_ring, ring);
1938 }
1939 if (count) {
1940 sds_ring->consumer = consumer;
1941 writel(consumer, sds_ring->crb_sts_consumer);
1942 }
1943 return count;
1944}
1945
1946static int qlcnic_83xx_msix_sriov_vf_poll(struct napi_struct *napi, int budget)
1947{
1948 int tx_complete;
1949 int work_done;
1950 struct qlcnic_host_sds_ring *sds_ring;
1951 struct qlcnic_adapter *adapter;
1952 struct qlcnic_host_tx_ring *tx_ring;
1953
1954 sds_ring = container_of(napi, struct qlcnic_host_sds_ring, napi);
1955 adapter = sds_ring->adapter;
1956
1957 tx_ring = adapter->tx_ring;
1958
1959 tx_complete = qlcnic_process_cmd_ring(adapter, tx_ring, budget);
1960 work_done = qlcnic_83xx_process_rcv_ring(sds_ring, budget);
1961
1962
1963 if (!tx_complete)
1964 work_done = budget;
1965
1966 if (work_done < budget) {
1967 napi_complete(&sds_ring->napi);
1968 qlcnic_enable_sds_intr(adapter, sds_ring);
1969 }
1970
1971 return work_done;
1972}
1973
1974static int qlcnic_83xx_poll(struct napi_struct *napi, int budget)
1975{
1976 int tx_complete;
1977 int work_done;
1978 struct qlcnic_host_sds_ring *sds_ring;
1979 struct qlcnic_adapter *adapter;
1980 struct qlcnic_host_tx_ring *tx_ring;
1981
1982 sds_ring = container_of(napi, struct qlcnic_host_sds_ring, napi);
1983 adapter = sds_ring->adapter;
1984
1985 tx_ring = adapter->tx_ring;
1986
1987 tx_complete = qlcnic_process_cmd_ring(adapter, tx_ring, budget);
1988 work_done = qlcnic_83xx_process_rcv_ring(sds_ring, budget);
1989
1990
1991 if (!tx_complete)
1992 work_done = budget;
1993
1994 if (work_done < budget) {
1995 napi_complete(&sds_ring->napi);
1996 qlcnic_enable_sds_intr(adapter, sds_ring);
1997 }
1998
1999 return work_done;
2000}
2001
2002static int qlcnic_83xx_msix_tx_poll(struct napi_struct *napi, int budget)
2003{
2004 int work_done;
2005 struct qlcnic_host_tx_ring *tx_ring;
2006 struct qlcnic_adapter *adapter;
2007
2008 budget = QLCNIC_TX_POLL_BUDGET;
2009 tx_ring = container_of(napi, struct qlcnic_host_tx_ring, napi);
2010 adapter = tx_ring->adapter;
2011 work_done = qlcnic_process_cmd_ring(adapter, tx_ring, budget);
2012 if (work_done) {
2013 napi_complete(&tx_ring->napi);
2014 if (test_bit(__QLCNIC_DEV_UP , &adapter->state))
2015 qlcnic_enable_tx_intr(adapter, tx_ring);
2016 } else {
2017
2018 work_done = budget;
2019 }
2020
2021 return work_done;
2022}
2023
2024static int qlcnic_83xx_rx_poll(struct napi_struct *napi, int budget)
2025{
2026 int work_done;
2027 struct qlcnic_host_sds_ring *sds_ring;
2028 struct qlcnic_adapter *adapter;
2029
2030 sds_ring = container_of(napi, struct qlcnic_host_sds_ring, napi);
2031 adapter = sds_ring->adapter;
2032 work_done = qlcnic_83xx_process_rcv_ring(sds_ring, budget);
2033 if (work_done < budget) {
2034 napi_complete(&sds_ring->napi);
2035 if (test_bit(__QLCNIC_DEV_UP, &adapter->state))
2036 qlcnic_enable_sds_intr(adapter, sds_ring);
2037 }
2038
2039 return work_done;
2040}
2041
2042void qlcnic_83xx_napi_enable(struct qlcnic_adapter *adapter)
2043{
2044 int ring;
2045 struct qlcnic_host_sds_ring *sds_ring;
2046 struct qlcnic_host_tx_ring *tx_ring;
2047 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
2048
2049 if (adapter->is_up != QLCNIC_ADAPTER_UP_MAGIC)
2050 return;
2051
2052 for (ring = 0; ring < adapter->drv_sds_rings; ring++) {
2053 sds_ring = &recv_ctx->sds_rings[ring];
2054 napi_enable(&sds_ring->napi);
2055 if (adapter->flags & QLCNIC_MSIX_ENABLED)
2056 qlcnic_enable_sds_intr(adapter, sds_ring);
2057 }
2058
2059 if ((adapter->flags & QLCNIC_MSIX_ENABLED) &&
2060 !(adapter->flags & QLCNIC_TX_INTR_SHARED)) {
2061 for (ring = 0; ring < adapter->drv_tx_rings; ring++) {
2062 tx_ring = &adapter->tx_ring[ring];
2063 napi_enable(&tx_ring->napi);
2064 qlcnic_enable_tx_intr(adapter, tx_ring);
2065 }
2066 }
2067}
2068
2069void qlcnic_83xx_napi_disable(struct qlcnic_adapter *adapter)
2070{
2071 int ring;
2072 struct qlcnic_host_sds_ring *sds_ring;
2073 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
2074 struct qlcnic_host_tx_ring *tx_ring;
2075
2076 if (adapter->is_up != QLCNIC_ADAPTER_UP_MAGIC)
2077 return;
2078
2079 for (ring = 0; ring < adapter->drv_sds_rings; ring++) {
2080 sds_ring = &recv_ctx->sds_rings[ring];
2081 if (adapter->flags & QLCNIC_MSIX_ENABLED)
2082 qlcnic_disable_sds_intr(adapter, sds_ring);
2083 napi_synchronize(&sds_ring->napi);
2084 napi_disable(&sds_ring->napi);
2085 }
2086
2087 if ((adapter->flags & QLCNIC_MSIX_ENABLED) &&
2088 !(adapter->flags & QLCNIC_TX_INTR_SHARED)) {
2089 for (ring = 0; ring < adapter->drv_tx_rings; ring++) {
2090 tx_ring = &adapter->tx_ring[ring];
2091 qlcnic_disable_tx_intr(adapter, tx_ring);
2092 napi_synchronize(&tx_ring->napi);
2093 napi_disable(&tx_ring->napi);
2094 }
2095 }
2096}
2097
2098int qlcnic_83xx_napi_add(struct qlcnic_adapter *adapter,
2099 struct net_device *netdev)
2100{
2101 int ring;
2102 struct qlcnic_host_sds_ring *sds_ring;
2103 struct qlcnic_host_tx_ring *tx_ring;
2104 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
2105
2106 if (qlcnic_alloc_sds_rings(recv_ctx, adapter->drv_sds_rings))
2107 return -ENOMEM;
2108
2109 for (ring = 0; ring < adapter->drv_sds_rings; ring++) {
2110 sds_ring = &recv_ctx->sds_rings[ring];
2111 if (adapter->flags & QLCNIC_MSIX_ENABLED) {
2112 if (!(adapter->flags & QLCNIC_TX_INTR_SHARED))
2113 netif_napi_add(netdev, &sds_ring->napi,
2114 qlcnic_83xx_rx_poll,
2115 NAPI_POLL_WEIGHT);
2116 else
2117 netif_napi_add(netdev, &sds_ring->napi,
2118 qlcnic_83xx_msix_sriov_vf_poll,
2119 NAPI_POLL_WEIGHT);
2120
2121 } else {
2122 netif_napi_add(netdev, &sds_ring->napi,
2123 qlcnic_83xx_poll,
2124 NAPI_POLL_WEIGHT);
2125 }
2126 }
2127
2128 if (qlcnic_alloc_tx_rings(adapter, netdev)) {
2129 qlcnic_free_sds_rings(recv_ctx);
2130 return -ENOMEM;
2131 }
2132
2133 if ((adapter->flags & QLCNIC_MSIX_ENABLED) &&
2134 !(adapter->flags & QLCNIC_TX_INTR_SHARED)) {
2135 for (ring = 0; ring < adapter->drv_tx_rings; ring++) {
2136 tx_ring = &adapter->tx_ring[ring];
2137 netif_napi_add(netdev, &tx_ring->napi,
2138 qlcnic_83xx_msix_tx_poll,
2139 NAPI_POLL_WEIGHT);
2140 }
2141 }
2142
2143 return 0;
2144}
2145
2146void qlcnic_83xx_napi_del(struct qlcnic_adapter *adapter)
2147{
2148 int ring;
2149 struct qlcnic_host_sds_ring *sds_ring;
2150 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
2151 struct qlcnic_host_tx_ring *tx_ring;
2152
2153 for (ring = 0; ring < adapter->drv_sds_rings; ring++) {
2154 sds_ring = &recv_ctx->sds_rings[ring];
2155 netif_napi_del(&sds_ring->napi);
2156 }
2157
2158 qlcnic_free_sds_rings(adapter->recv_ctx);
2159
2160 if ((adapter->flags & QLCNIC_MSIX_ENABLED) &&
2161 !(adapter->flags & QLCNIC_TX_INTR_SHARED)) {
2162 for (ring = 0; ring < adapter->drv_tx_rings; ring++) {
2163 tx_ring = &adapter->tx_ring[ring];
2164 netif_napi_del(&tx_ring->napi);
2165 }
2166 }
2167
2168 qlcnic_free_tx_rings(adapter);
2169}
2170
2171static void qlcnic_83xx_process_rcv_diag(struct qlcnic_adapter *adapter,
2172 int ring, u64 sts_data[])
2173{
2174 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
2175 struct sk_buff *skb;
2176 struct qlcnic_host_rds_ring *rds_ring;
2177 int index, length;
2178
2179 if (unlikely(ring >= adapter->max_rds_rings))
2180 return;
2181
2182 rds_ring = &recv_ctx->rds_rings[ring];
2183 index = qlcnic_83xx_hndl(sts_data[0]);
2184 if (unlikely(index >= rds_ring->num_desc))
2185 return;
2186
2187 length = qlcnic_83xx_pktln(sts_data[0]);
2188
2189 skb = qlcnic_process_rxbuf(adapter, rds_ring, index, STATUS_CKSUM_OK);
2190 if (!skb)
2191 return;
2192
2193 if (length > rds_ring->skb_size)
2194 skb_put(skb, rds_ring->skb_size);
2195 else
2196 skb_put(skb, length);
2197
2198 if (!qlcnic_check_loopback_buff(skb->data, adapter->mac_addr))
2199 adapter->ahw->diag_cnt++;
2200 else
2201 dump_skb(skb, adapter);
2202
2203 dev_kfree_skb_any(skb);
2204 return;
2205}
2206
2207void qlcnic_83xx_process_rcv_ring_diag(struct qlcnic_host_sds_ring *sds_ring)
2208{
2209 struct qlcnic_adapter *adapter = sds_ring->adapter;
2210 struct status_desc *desc;
2211 u64 sts_data[2];
2212 int ring, opcode;
2213 u32 consumer = sds_ring->consumer;
2214
2215 desc = &sds_ring->desc_head[consumer];
2216 sts_data[0] = le64_to_cpu(desc->status_desc_data[0]);
2217 sts_data[1] = le64_to_cpu(desc->status_desc_data[1]);
2218 opcode = qlcnic_83xx_opcode(sts_data[1]);
2219 if (!opcode)
2220 return;
2221
2222 ring = QLCNIC_FETCH_RING_ID(qlcnic_83xx_hndl(sts_data[0]));
2223 qlcnic_83xx_process_rcv_diag(adapter, ring, sts_data);
2224 desc = &sds_ring->desc_head[consumer];
2225 desc->status_desc_data[0] = cpu_to_le64(STATUS_OWNER_PHANTOM);
2226 consumer = get_next_index(consumer, sds_ring->num_desc);
2227 sds_ring->consumer = consumer;
2228 writel(consumer, sds_ring->crb_sts_consumer);
2229}
2230
