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7#include <linux/netdevice.h>
8#include <linux/if_vlan.h>
9#include <net/ip.h>
10#include <linux/ipv6.h>
11#include <net/checksum.h>
12#include <linux/printk.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_TCP_HDR_SIZE 20
105#define QLCNIC_TCP_TS_OPTION_SIZE 12
106#define QLCNIC_FETCH_RING_ID(handle) ((handle) >> 63)
107#define QLCNIC_DESC_OWNER_FW cpu_to_le64(STATUS_OWNER_PHANTOM)
108
109#define QLCNIC_TCP_TS_HDR_SIZE (QLCNIC_TCP_HDR_SIZE + QLCNIC_TCP_TS_OPTION_SIZE)
110
111
112#define STATUS_CKSUM_LOOP 0
113#define STATUS_CKSUM_OK 2
114
115#define qlcnic_83xx_pktln(sts) ((sts >> 32) & 0x3FFF)
116#define qlcnic_83xx_hndl(sts) ((sts >> 48) & 0x7FFF)
117#define qlcnic_83xx_csum_status(sts) ((sts >> 39) & 7)
118#define qlcnic_83xx_opcode(sts) ((sts >> 42) & 0xF)
119#define qlcnic_83xx_vlan_tag(sts) (((sts) >> 48) & 0xFFFF)
120#define qlcnic_83xx_lro_pktln(sts) (((sts) >> 32) & 0x3FFF)
121#define qlcnic_83xx_l2_hdr_off(sts) (((sts) >> 16) & 0xFF)
122#define qlcnic_83xx_l4_hdr_off(sts) (((sts) >> 24) & 0xFF)
123#define qlcnic_83xx_pkt_cnt(sts) (((sts) >> 16) & 0x7)
124#define qlcnic_83xx_is_tstamp(sts) (((sts) >> 40) & 1)
125#define qlcnic_83xx_is_psh_bit(sts) (((sts) >> 41) & 1)
126#define qlcnic_83xx_is_ip_align(sts) (((sts) >> 46) & 1)
127#define qlcnic_83xx_has_vlan_tag(sts) (((sts) >> 47) & 1)
128
129static int qlcnic_process_rcv_ring(struct qlcnic_host_sds_ring *sds_ring,
130 int max);
131
132static struct sk_buff *qlcnic_process_rxbuf(struct qlcnic_adapter *,
133 struct qlcnic_host_rds_ring *,
134 u16, u16);
135
136static inline u8 qlcnic_mac_hash(u64 mac, u16 vlan)
137{
138 return (u8)((mac & 0xff) ^ ((mac >> 40) & 0xff) ^ (vlan & 0xff));
139}
140
141static inline u32 qlcnic_get_ref_handle(struct qlcnic_adapter *adapter,
142 u16 handle, u8 ring_id)
143{
144 if (qlcnic_83xx_check(adapter))
145 return handle | (ring_id << 15);
146 else
147 return handle;
148}
149
150static inline int qlcnic_82xx_is_lb_pkt(u64 sts_data)
151{
152 return (qlcnic_get_sts_status(sts_data) == STATUS_CKSUM_LOOP) ? 1 : 0;
153}
154
155static void qlcnic_delete_rx_list_mac(struct qlcnic_adapter *adapter,
156 struct qlcnic_filter *fil,
157 void *addr, u16 vlan_id)
158{
159 int ret;
160 u8 op;
161
162 op = vlan_id ? QLCNIC_MAC_VLAN_ADD : QLCNIC_MAC_ADD;
163 ret = qlcnic_sre_macaddr_change(adapter, addr, vlan_id, op);
164 if (ret)
165 return;
166
167 op = vlan_id ? QLCNIC_MAC_VLAN_DEL : QLCNIC_MAC_DEL;
168 ret = qlcnic_sre_macaddr_change(adapter, addr, vlan_id, op);
169 if (!ret) {
170 hlist_del(&fil->fnode);
171 adapter->rx_fhash.fnum--;
172 }
173}
174
175static struct qlcnic_filter *qlcnic_find_mac_filter(struct hlist_head *head,
176 void *addr, u16 vlan_id)
177{
178 struct qlcnic_filter *tmp_fil = NULL;
179 struct hlist_node *n;
180
181 hlist_for_each_entry_safe(tmp_fil, n, head, fnode) {
182 if (ether_addr_equal(tmp_fil->faddr, addr) &&
183 tmp_fil->vlan_id == vlan_id)
184 return tmp_fil;
185 }
186
187 return NULL;
188}
189
190static void qlcnic_add_lb_filter(struct qlcnic_adapter *adapter,
191 struct sk_buff *skb, int loopback_pkt, u16 vlan_id)
192{
193 struct ethhdr *phdr = (struct ethhdr *)(skb->data);
194 struct qlcnic_filter *fil, *tmp_fil;
195 struct hlist_head *head;
196 unsigned long time;
197 u64 src_addr = 0;
198 u8 hindex, op;
199 int ret;
200
201 if (!qlcnic_sriov_pf_check(adapter) || (vlan_id == 0xffff))
202 vlan_id = 0;
203
204 memcpy(&src_addr, phdr->h_source, ETH_ALEN);
205 hindex = qlcnic_mac_hash(src_addr, vlan_id) &
206 (adapter->fhash.fbucket_size - 1);
207
208 if (loopback_pkt) {
209 if (adapter->rx_fhash.fnum >= adapter->rx_fhash.fmax)
210 return;
211
212 head = &(adapter->rx_fhash.fhead[hindex]);
213
214 tmp_fil = qlcnic_find_mac_filter(head, &src_addr, vlan_id);
215 if (tmp_fil) {
216 time = tmp_fil->ftime;
217 if (time_after(jiffies, QLCNIC_READD_AGE * HZ + time))
218 tmp_fil->ftime = jiffies;
219 return;
220 }
221
222 fil = kzalloc(sizeof(struct qlcnic_filter), GFP_ATOMIC);
223 if (!fil)
224 return;
225
226 fil->ftime = jiffies;
227 memcpy(fil->faddr, &src_addr, ETH_ALEN);
228 fil->vlan_id = vlan_id;
229 spin_lock(&adapter->rx_mac_learn_lock);
230 hlist_add_head(&(fil->fnode), head);
231 adapter->rx_fhash.fnum++;
232 spin_unlock(&adapter->rx_mac_learn_lock);
233 } else {
234 head = &adapter->fhash.fhead[hindex];
235
236 spin_lock(&adapter->mac_learn_lock);
237
238 tmp_fil = qlcnic_find_mac_filter(head, &src_addr, vlan_id);
239 if (tmp_fil) {
240 op = vlan_id ? QLCNIC_MAC_VLAN_DEL : QLCNIC_MAC_DEL;
241 ret = qlcnic_sre_macaddr_change(adapter,
242 (u8 *)&src_addr,
243 vlan_id, op);
244 if (!ret) {
245 hlist_del(&tmp_fil->fnode);
246 adapter->fhash.fnum--;
247 }
248
249 spin_unlock(&adapter->mac_learn_lock);
250
251 return;
252 }
253
254 spin_unlock(&adapter->mac_learn_lock);
255
256 head = &adapter->rx_fhash.fhead[hindex];
257
258 spin_lock(&adapter->rx_mac_learn_lock);
259
260 tmp_fil = qlcnic_find_mac_filter(head, &src_addr, vlan_id);
261 if (tmp_fil)
262 qlcnic_delete_rx_list_mac(adapter, tmp_fil, &src_addr,
263 vlan_id);
264
265 spin_unlock(&adapter->rx_mac_learn_lock);
266 }
267}
268
269void qlcnic_82xx_change_filter(struct qlcnic_adapter *adapter, u64 *uaddr,
270 u16 vlan_id, struct qlcnic_host_tx_ring *tx_ring)
271{
272 struct cmd_desc_type0 *hwdesc;
273 struct qlcnic_nic_req *req;
274 struct qlcnic_mac_req *mac_req;
275 struct qlcnic_vlan_req *vlan_req;
276 u32 producer;
277 u64 word;
278
279 producer = tx_ring->producer;
280 hwdesc = &tx_ring->desc_head[tx_ring->producer];
281
282 req = (struct qlcnic_nic_req *)hwdesc;
283 memset(req, 0, sizeof(struct qlcnic_nic_req));
284 req->qhdr = cpu_to_le64(QLCNIC_REQUEST << 23);
285
286 word = QLCNIC_MAC_EVENT | ((u64)(adapter->portnum) << 16);
287 req->req_hdr = cpu_to_le64(word);
288
289 mac_req = (struct qlcnic_mac_req *)&(req->words[0]);
290 mac_req->op = vlan_id ? QLCNIC_MAC_VLAN_ADD : QLCNIC_MAC_ADD;
291 memcpy(mac_req->mac_addr, uaddr, ETH_ALEN);
292
293 vlan_req = (struct qlcnic_vlan_req *)&req->words[1];
294 vlan_req->vlan_id = cpu_to_le16(vlan_id);
295
296 tx_ring->producer = get_next_index(producer, tx_ring->num_desc);
297 smp_mb();
298}
299
300static void qlcnic_send_filter(struct qlcnic_adapter *adapter,
301 struct cmd_desc_type0 *first_desc,
302 struct sk_buff *skb,
303 struct qlcnic_host_tx_ring *tx_ring)
304{
305 struct vlan_ethhdr *vh = (struct vlan_ethhdr *)(skb->data);
306 struct ethhdr *phdr = (struct ethhdr *)(skb->data);
307 u16 protocol = ntohs(skb->protocol);
308 struct qlcnic_filter *fil, *tmp_fil;
309 struct hlist_head *head;
310 struct hlist_node *n;
311 u64 src_addr = 0;
312 u16 vlan_id = 0;
313 u8 hindex, hval;
314
315 if (ether_addr_equal(phdr->h_source, adapter->mac_addr))
316 return;
317
318 if (adapter->flags & QLCNIC_VLAN_FILTERING) {
319 if (protocol == ETH_P_8021Q) {
320 vh = (struct vlan_ethhdr *)skb->data;
321 vlan_id = ntohs(vh->h_vlan_TCI);
322 } else if (skb_vlan_tag_present(skb)) {
323 vlan_id = skb_vlan_tag_get(skb);
324 }
325 }
326
327 memcpy(&src_addr, phdr->h_source, ETH_ALEN);
328 hval = qlcnic_mac_hash(src_addr, vlan_id);
329 hindex = hval & (adapter->fhash.fbucket_size - 1);
330 head = &(adapter->fhash.fhead[hindex]);
331
332 hlist_for_each_entry_safe(tmp_fil, n, head, fnode) {
333 if (ether_addr_equal(tmp_fil->faddr, (u8 *)&src_addr) &&
334 tmp_fil->vlan_id == vlan_id) {
335 if (jiffies > (QLCNIC_READD_AGE * HZ + tmp_fil->ftime))
336 qlcnic_change_filter(adapter, &src_addr,
337 vlan_id, tx_ring);
338 tmp_fil->ftime = jiffies;
339 return;
340 }
341 }
342
343 if (unlikely(adapter->fhash.fnum >= adapter->fhash.fmax)) {
344 adapter->stats.mac_filter_limit_overrun++;
345 return;
346 }
347
348 fil = kzalloc(sizeof(struct qlcnic_filter), GFP_ATOMIC);
349 if (!fil)
350 return;
351
352 qlcnic_change_filter(adapter, &src_addr, vlan_id, tx_ring);
353 fil->ftime = jiffies;
354 fil->vlan_id = vlan_id;
355 memcpy(fil->faddr, &src_addr, ETH_ALEN);
356 spin_lock(&adapter->mac_learn_lock);
357 hlist_add_head(&(fil->fnode), head);
358 adapter->fhash.fnum++;
359 spin_unlock(&adapter->mac_learn_lock);
360}
361
362#define QLCNIC_ENCAP_VXLAN_PKT BIT_0
363#define QLCNIC_ENCAP_OUTER_L3_IP6 BIT_1
364#define QLCNIC_ENCAP_INNER_L3_IP6 BIT_2
365#define QLCNIC_ENCAP_INNER_L4_UDP BIT_3
366#define QLCNIC_ENCAP_DO_L3_CSUM BIT_4
367#define QLCNIC_ENCAP_DO_L4_CSUM BIT_5
368
369static int qlcnic_tx_encap_pkt(struct qlcnic_adapter *adapter,
370 struct cmd_desc_type0 *first_desc,
371 struct sk_buff *skb,
372 struct qlcnic_host_tx_ring *tx_ring)
373{
374 u8 opcode = 0, inner_hdr_len = 0, outer_hdr_len = 0, total_hdr_len = 0;
375 int copied, copy_len, descr_size;
376 u32 producer = tx_ring->producer;
377 struct cmd_desc_type0 *hwdesc;
378 u16 flags = 0, encap_descr = 0;
379
380 opcode = QLCNIC_TX_ETHER_PKT;
381 encap_descr = QLCNIC_ENCAP_VXLAN_PKT;
382
383 if (skb_is_gso(skb)) {
384 inner_hdr_len = skb_inner_transport_header(skb) +
385 inner_tcp_hdrlen(skb) -
386 skb_inner_mac_header(skb);
387
388
389 outer_hdr_len = skb_transport_offset(skb) + 8 +
390 sizeof(struct udphdr);
391 first_desc->outer_hdr_length = outer_hdr_len;
392 total_hdr_len = inner_hdr_len + outer_hdr_len;
393 encap_descr |= QLCNIC_ENCAP_DO_L3_CSUM |
394 QLCNIC_ENCAP_DO_L4_CSUM;
395 first_desc->mss = cpu_to_le16(skb_shinfo(skb)->gso_size);
396 first_desc->hdr_length = inner_hdr_len;
397
398
399
400
401
402 copied = 0;
403 descr_size = (int)sizeof(struct cmd_desc_type0);
404 while (copied < total_hdr_len) {
405 copy_len = min(descr_size, (total_hdr_len - copied));
406 hwdesc = &tx_ring->desc_head[producer];
407 tx_ring->cmd_buf_arr[producer].skb = NULL;
408 skb_copy_from_linear_data_offset(skb, copied,
409 (char *)hwdesc,
410 copy_len);
411 copied += copy_len;
412 producer = get_next_index(producer, tx_ring->num_desc);
413 }
414
415 tx_ring->producer = producer;
416
417
418
419
420 smp_mb();
421 adapter->stats.encap_lso_frames++;
422
423 opcode = QLCNIC_TX_ENCAP_LSO;
424 } else if (skb->ip_summed == CHECKSUM_PARTIAL) {
425 if (inner_ip_hdr(skb)->version == 6) {
426 if (inner_ipv6_hdr(skb)->nexthdr == IPPROTO_UDP)
427 encap_descr |= QLCNIC_ENCAP_INNER_L4_UDP;
428 } else {
429 if (inner_ip_hdr(skb)->protocol == IPPROTO_UDP)
430 encap_descr |= QLCNIC_ENCAP_INNER_L4_UDP;
431 }
432
433 adapter->stats.encap_tx_csummed++;
434 opcode = QLCNIC_TX_ENCAP_PKT;
435 }
436
437
438 if (ip_hdr(skb)->version == 6)
439 encap_descr |= QLCNIC_ENCAP_OUTER_L3_IP6;
440
441
442 encap_descr |= (skb_network_header_len(skb) >> 2) << 6;
443
444
445 encap_descr |= skb_network_offset(skb) << 10;
446 first_desc->encap_descr = cpu_to_le16(encap_descr);
447
448 first_desc->tcp_hdr_offset = skb_inner_transport_header(skb) -
449 skb->data;
450 first_desc->ip_hdr_offset = skb_inner_network_offset(skb);
451
452 qlcnic_set_tx_flags_opcode(first_desc, flags, opcode);
453
454 return 0;
455}
456
457static int qlcnic_tx_pkt(struct qlcnic_adapter *adapter,
458 struct cmd_desc_type0 *first_desc, struct sk_buff *skb,
459 struct qlcnic_host_tx_ring *tx_ring)
460{
461 u8 l4proto, opcode = 0, hdr_len = 0, tag_vlan = 0;
462 u16 flags = 0, vlan_tci = 0;
463 int copied, offset, copy_len, size;
464 struct cmd_desc_type0 *hwdesc;
465 struct vlan_ethhdr *vh;
466 u16 protocol = ntohs(skb->protocol);
467 u32 producer = tx_ring->producer;
468
469 if (protocol == ETH_P_8021Q) {
470 vh = (struct vlan_ethhdr *)skb->data;
471 flags = QLCNIC_FLAGS_VLAN_TAGGED;
472 vlan_tci = ntohs(vh->h_vlan_TCI);
473 protocol = ntohs(vh->h_vlan_encapsulated_proto);
474 tag_vlan = 1;
475 } else if (skb_vlan_tag_present(skb)) {
476 flags = QLCNIC_FLAGS_VLAN_OOB;
477 vlan_tci = skb_vlan_tag_get(skb);
478 tag_vlan = 1;
479 }
480 if (unlikely(adapter->tx_pvid)) {
481 if (tag_vlan && !(adapter->flags & QLCNIC_TAGGING_ENABLED))
482 return -EIO;
483 if (tag_vlan && (adapter->flags & QLCNIC_TAGGING_ENABLED))
484 goto set_flags;
485
486 flags = QLCNIC_FLAGS_VLAN_OOB;
487 vlan_tci = adapter->tx_pvid;
488 }
489set_flags:
490 qlcnic_set_tx_vlan_tci(first_desc, vlan_tci);
491 qlcnic_set_tx_flags_opcode(first_desc, flags, opcode);
492
493 if (*(skb->data) & BIT_0) {
494 flags |= BIT_0;
495 memcpy(&first_desc->eth_addr, skb->data, ETH_ALEN);
496 }
497 opcode = QLCNIC_TX_ETHER_PKT;
498 if (skb_is_gso(skb)) {
499 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
500 first_desc->mss = cpu_to_le16(skb_shinfo(skb)->gso_size);
501 first_desc->hdr_length = hdr_len;
502 opcode = (protocol == ETH_P_IPV6) ? QLCNIC_TX_TCP_LSO6 :
503 QLCNIC_TX_TCP_LSO;
504
505
506
507 copied = 0;
508 offset = 2;
509
510 if (flags & QLCNIC_FLAGS_VLAN_OOB) {
511 first_desc->hdr_length += VLAN_HLEN;
512 first_desc->tcp_hdr_offset = VLAN_HLEN;
513 first_desc->ip_hdr_offset = VLAN_HLEN;
514
515
516 flags |= QLCNIC_FLAGS_VLAN_TAGGED;
517
518
519 hwdesc = &tx_ring->desc_head[producer];
520 tx_ring->cmd_buf_arr[producer].skb = NULL;
521
522 copy_len = min((int)sizeof(struct cmd_desc_type0) -
523 offset, hdr_len + VLAN_HLEN);
524
525 vh = (struct vlan_ethhdr *)((char *) hwdesc + 2);
526 skb_copy_from_linear_data(skb, vh, 12);
527 vh->h_vlan_proto = htons(ETH_P_8021Q);
528 vh->h_vlan_TCI = htons(vlan_tci);
529
530 skb_copy_from_linear_data_offset(skb, 12,
531 (char *)vh + 16,
532 copy_len - 16);
533 copied = copy_len - VLAN_HLEN;
534 offset = 0;
535 producer = get_next_index(producer, tx_ring->num_desc);
536 }
537
538 while (copied < hdr_len) {
539 size = (int)sizeof(struct cmd_desc_type0) - offset;
540 copy_len = min(size, (hdr_len - copied));
541 hwdesc = &tx_ring->desc_head[producer];
542 tx_ring->cmd_buf_arr[producer].skb = NULL;
543 skb_copy_from_linear_data_offset(skb, copied,
544 (char *)hwdesc +
545 offset, copy_len);
546 copied += copy_len;
547 offset = 0;
548 producer = get_next_index(producer, tx_ring->num_desc);
549 }
550
551 tx_ring->producer = producer;
552 smp_mb();
553 adapter->stats.lso_frames++;
554
555 } else if (skb->ip_summed == CHECKSUM_PARTIAL) {
556 if (protocol == ETH_P_IP) {
557 l4proto = ip_hdr(skb)->protocol;
558
559 if (l4proto == IPPROTO_TCP)
560 opcode = QLCNIC_TX_TCP_PKT;
561 else if (l4proto == IPPROTO_UDP)
562 opcode = QLCNIC_TX_UDP_PKT;
563 } else if (protocol == ETH_P_IPV6) {
564 l4proto = ipv6_hdr(skb)->nexthdr;
565
566 if (l4proto == IPPROTO_TCP)
567 opcode = QLCNIC_TX_TCPV6_PKT;
568 else if (l4proto == IPPROTO_UDP)
569 opcode = QLCNIC_TX_UDPV6_PKT;
570 }
571 }
572 first_desc->tcp_hdr_offset += skb_transport_offset(skb);
573 first_desc->ip_hdr_offset += skb_network_offset(skb);
574 qlcnic_set_tx_flags_opcode(first_desc, flags, opcode);
575
576 return 0;
577}
578
579static int qlcnic_map_tx_skb(struct pci_dev *pdev, struct sk_buff *skb,
580 struct qlcnic_cmd_buffer *pbuf)
581{
582 struct qlcnic_skb_frag *nf;
583 skb_frag_t *frag;
584 int i, nr_frags;
585 dma_addr_t map;
586
587 nr_frags = skb_shinfo(skb)->nr_frags;
588 nf = &pbuf->frag_array[0];
589
590 map = dma_map_single(&pdev->dev, skb->data, skb_headlen(skb),
591 DMA_TO_DEVICE);
592 if (dma_mapping_error(&pdev->dev, map))
593 goto out_err;
594
595 nf->dma = map;
596 nf->length = skb_headlen(skb);
597
598 for (i = 0; i < nr_frags; i++) {
599 frag = &skb_shinfo(skb)->frags[i];
600 nf = &pbuf->frag_array[i+1];
601 map = skb_frag_dma_map(&pdev->dev, frag, 0, skb_frag_size(frag),
602 DMA_TO_DEVICE);
603 if (dma_mapping_error(&pdev->dev, map))
604 goto unwind;
605
606 nf->dma = map;
607 nf->length = skb_frag_size(frag);
608 }
609
610 return 0;
611
612unwind:
613 while (--i >= 0) {
614 nf = &pbuf->frag_array[i+1];
615 dma_unmap_page(&pdev->dev, nf->dma, nf->length, DMA_TO_DEVICE);
616 }
617
618 nf = &pbuf->frag_array[0];
619 dma_unmap_single(&pdev->dev, nf->dma, skb_headlen(skb), DMA_TO_DEVICE);
620
621out_err:
622 return -ENOMEM;
623}
624
625static void qlcnic_unmap_buffers(struct pci_dev *pdev, struct sk_buff *skb,
626 struct qlcnic_cmd_buffer *pbuf)
627{
628 struct qlcnic_skb_frag *nf = &pbuf->frag_array[0];
629 int i, nr_frags = skb_shinfo(skb)->nr_frags;
630
631 for (i = 0; i < nr_frags; i++) {
632 nf = &pbuf->frag_array[i+1];
633 dma_unmap_page(&pdev->dev, nf->dma, nf->length, DMA_TO_DEVICE);
634 }
635
636 nf = &pbuf->frag_array[0];
637 dma_unmap_single(&pdev->dev, nf->dma, skb_headlen(skb), DMA_TO_DEVICE);
638 pbuf->skb = NULL;
639}
640
641static inline void qlcnic_clear_cmddesc(u64 *desc)
642{
643 desc[0] = 0ULL;
644 desc[2] = 0ULL;
645 desc[7] = 0ULL;
646}
647
648netdev_tx_t qlcnic_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
649{
650 struct qlcnic_adapter *adapter = netdev_priv(netdev);
651 struct qlcnic_host_tx_ring *tx_ring;
652 struct qlcnic_cmd_buffer *pbuf;
653 struct qlcnic_skb_frag *buffrag;
654 struct cmd_desc_type0 *hwdesc, *first_desc;
655 struct pci_dev *pdev;
656 struct ethhdr *phdr;
657 int i, k, frag_count, delta = 0;
658 u32 producer, num_txd;
659 u16 protocol;
660 bool l4_is_udp = false;
661
662 if (!test_bit(__QLCNIC_DEV_UP, &adapter->state)) {
663 netif_tx_stop_all_queues(netdev);
664 return NETDEV_TX_BUSY;
665 }
666
667 if (adapter->flags & QLCNIC_MACSPOOF) {
668 phdr = (struct ethhdr *)skb->data;
669 if (!ether_addr_equal(phdr->h_source, adapter->mac_addr))
670 goto drop_packet;
671 }
672
673 tx_ring = &adapter->tx_ring[skb_get_queue_mapping(skb)];
674 num_txd = tx_ring->num_desc;
675
676 frag_count = skb_shinfo(skb)->nr_frags + 1;
677
678
679
680
681 if (!skb_is_gso(skb) && frag_count > QLCNIC_MAX_FRAGS_PER_TX) {
682 for (i = 0; i < (frag_count - QLCNIC_MAX_FRAGS_PER_TX); i++)
683 delta += skb_frag_size(&skb_shinfo(skb)->frags[i]);
684
685 if (!__pskb_pull_tail(skb, delta))
686 goto drop_packet;
687
688 frag_count = 1 + skb_shinfo(skb)->nr_frags;
689 }
690
691 if (unlikely(qlcnic_tx_avail(tx_ring) <= TX_STOP_THRESH)) {
692 netif_tx_stop_queue(tx_ring->txq);
693 if (qlcnic_tx_avail(tx_ring) > TX_STOP_THRESH) {
694 netif_tx_start_queue(tx_ring->txq);
695 } else {
696 tx_ring->tx_stats.xmit_off++;
697 return NETDEV_TX_BUSY;
698 }
699 }
700
701 producer = tx_ring->producer;
702 pbuf = &tx_ring->cmd_buf_arr[producer];
703 pdev = adapter->pdev;
704 first_desc = &tx_ring->desc_head[producer];
705 hwdesc = &tx_ring->desc_head[producer];
706 qlcnic_clear_cmddesc((u64 *)hwdesc);
707
708 if (qlcnic_map_tx_skb(pdev, skb, pbuf)) {
709 adapter->stats.tx_dma_map_error++;
710 goto drop_packet;
711 }
712
713 pbuf->skb = skb;
714 pbuf->frag_count = frag_count;
715
716 qlcnic_set_tx_frags_len(first_desc, frag_count, skb->len);
717 qlcnic_set_tx_port(first_desc, adapter->portnum);
718
719 for (i = 0; i < frag_count; i++) {
720 k = i % 4;
721
722 if ((k == 0) && (i > 0)) {
723
724 producer = get_next_index(producer, num_txd);
725 hwdesc = &tx_ring->desc_head[producer];
726 qlcnic_clear_cmddesc((u64 *)hwdesc);
727 tx_ring->cmd_buf_arr[producer].skb = NULL;
728 }
729
730 buffrag = &pbuf->frag_array[i];
731 hwdesc->buffer_length[k] = cpu_to_le16(buffrag->length);
732 switch (k) {
733 case 0:
734 hwdesc->addr_buffer1 = cpu_to_le64(buffrag->dma);
735 break;
736 case 1:
737 hwdesc->addr_buffer2 = cpu_to_le64(buffrag->dma);
738 break;
739 case 2:
740 hwdesc->addr_buffer3 = cpu_to_le64(buffrag->dma);
741 break;
742 case 3:
743 hwdesc->addr_buffer4 = cpu_to_le64(buffrag->dma);
744 break;
745 }
746 }
747
748 tx_ring->producer = get_next_index(producer, num_txd);
749 smp_mb();
750
751 protocol = ntohs(skb->protocol);
752 if (protocol == ETH_P_IP)
753 l4_is_udp = ip_hdr(skb)->protocol == IPPROTO_UDP;
754 else if (protocol == ETH_P_IPV6)
755 l4_is_udp = ipv6_hdr(skb)->nexthdr == IPPROTO_UDP;
756
757
758 if (!skb->encapsulation || !l4_is_udp ||
759 !qlcnic_encap_tx_offload(adapter)) {
760 if (unlikely(qlcnic_tx_pkt(adapter, first_desc, skb,
761 tx_ring)))
762 goto unwind_buff;
763 } else {
764 if (unlikely(qlcnic_tx_encap_pkt(adapter, first_desc,
765 skb, tx_ring)))
766 goto unwind_buff;
767 }
768
769 if (adapter->drv_mac_learn)
770 qlcnic_send_filter(adapter, first_desc, skb, tx_ring);
771
772 tx_ring->tx_stats.tx_bytes += skb->len;
773 tx_ring->tx_stats.xmit_called++;
774
775
776 wmb();
777 qlcnic_update_cmd_producer(tx_ring);
778
779 return NETDEV_TX_OK;
780
781unwind_buff:
782 qlcnic_unmap_buffers(pdev, skb, pbuf);
783drop_packet:
784 adapter->stats.txdropped++;
785 dev_kfree_skb_any(skb);
786 return NETDEV_TX_OK;
787}
788
789void qlcnic_advert_link_change(struct qlcnic_adapter *adapter, int linkup)
790{
791 struct net_device *netdev = adapter->netdev;
792
793 if (adapter->ahw->linkup && !linkup) {
794 netdev_info(netdev, "NIC Link is down\n");
795 adapter->ahw->linkup = 0;
796 netif_carrier_off(netdev);
797 } else if (!adapter->ahw->linkup && linkup) {
798 adapter->ahw->linkup = 1;
799
800
801
802
803 if (qlcnic_83xx_check(adapter) && adapter->ahw->lb_mode) {
804 netdev_info(netdev, "NIC Link is up for loopback test\n");
805 return;
806 }
807
808 netdev_info(netdev, "NIC Link is up\n");
809 netif_carrier_on(netdev);
810 }
811}
812
813static int qlcnic_alloc_rx_skb(struct qlcnic_adapter *adapter,
814 struct qlcnic_host_rds_ring *rds_ring,
815 struct qlcnic_rx_buffer *buffer)
816{
817 struct sk_buff *skb;
818 dma_addr_t dma;
819 struct pci_dev *pdev = adapter->pdev;
820
821 skb = netdev_alloc_skb(adapter->netdev, rds_ring->skb_size);
822 if (!skb) {
823 adapter->stats.skb_alloc_failure++;
824 return -ENOMEM;
825 }
826
827 skb_reserve(skb, NET_IP_ALIGN);
828 dma = dma_map_single(&pdev->dev, skb->data, rds_ring->dma_size,
829 DMA_FROM_DEVICE);
830
831 if (dma_mapping_error(&pdev->dev, dma)) {
832 adapter->stats.rx_dma_map_error++;
833 dev_kfree_skb_any(skb);
834 return -ENOMEM;
835 }
836
837 buffer->skb = skb;
838 buffer->dma = dma;
839
840 return 0;
841}
842
843static void qlcnic_post_rx_buffers_nodb(struct qlcnic_adapter *adapter,
844 struct qlcnic_host_rds_ring *rds_ring,
845 u8 ring_id)
846{
847 struct rcv_desc *pdesc;
848 struct qlcnic_rx_buffer *buffer;
849 int count = 0;
850 uint32_t producer, handle;
851 struct list_head *head;
852
853 if (!spin_trylock(&rds_ring->lock))
854 return;
855
856 producer = rds_ring->producer;
857 head = &rds_ring->free_list;
858 while (!list_empty(head)) {
859 buffer = list_entry(head->next, struct qlcnic_rx_buffer, list);
860
861 if (!buffer->skb) {
862 if (qlcnic_alloc_rx_skb(adapter, rds_ring, buffer))
863 break;
864 }
865 count++;
866 list_del(&buffer->list);
867
868
869 pdesc = &rds_ring->desc_head[producer];
870 handle = qlcnic_get_ref_handle(adapter,
871 buffer->ref_handle, ring_id);
872 pdesc->reference_handle = cpu_to_le16(handle);
873 pdesc->buffer_length = cpu_to_le32(rds_ring->dma_size);
874 pdesc->addr_buffer = cpu_to_le64(buffer->dma);
875 producer = get_next_index(producer, rds_ring->num_desc);
876 }
877 if (count) {
878 rds_ring->producer = producer;
879 writel((producer - 1) & (rds_ring->num_desc - 1),
880 rds_ring->crb_rcv_producer);
881 }
882 spin_unlock(&rds_ring->lock);
883}
884
885static int qlcnic_process_cmd_ring(struct qlcnic_adapter *adapter,
886 struct qlcnic_host_tx_ring *tx_ring,
887 int budget)
888{
889 u32 sw_consumer, hw_consumer;
890 int i, done, count = 0;
891 struct qlcnic_cmd_buffer *buffer;
892 struct pci_dev *pdev = adapter->pdev;
893 struct net_device *netdev = adapter->netdev;
894 struct qlcnic_skb_frag *frag;
895
896 if (!spin_trylock(&tx_ring->tx_clean_lock))
897 return 1;
898
899 sw_consumer = tx_ring->sw_consumer;
900 hw_consumer = le32_to_cpu(*(tx_ring->hw_consumer));
901
902 while (sw_consumer != hw_consumer) {
903 buffer = &tx_ring->cmd_buf_arr[sw_consumer];
904 if (buffer->skb) {
905 frag = &buffer->frag_array[0];
906 dma_unmap_single(&pdev->dev, frag->dma, frag->length,
907 DMA_TO_DEVICE);
908 frag->dma = 0ULL;
909 for (i = 1; i < buffer->frag_count; i++) {
910 frag++;
911 dma_unmap_page(&pdev->dev, frag->dma,
912 frag->length, DMA_TO_DEVICE);
913 frag->dma = 0ULL;
914 }
915 tx_ring->tx_stats.xmit_finished++;
916 dev_kfree_skb_any(buffer->skb);
917 buffer->skb = NULL;
918 }
919
920 sw_consumer = get_next_index(sw_consumer, tx_ring->num_desc);
921 if (++count >= budget)
922 break;
923 }
924
925 tx_ring->sw_consumer = sw_consumer;
926
927 if (count && netif_running(netdev)) {
928 smp_mb();
929 if (netif_tx_queue_stopped(tx_ring->txq) &&
930 netif_carrier_ok(netdev)) {
931 if (qlcnic_tx_avail(tx_ring) > TX_STOP_THRESH) {
932 netif_tx_wake_queue(tx_ring->txq);
933 tx_ring->tx_stats.xmit_on++;
934 }
935 }
936 adapter->tx_timeo_cnt = 0;
937 }
938
939
940
941
942
943
944
945
946
947
948
949
950
951 hw_consumer = le32_to_cpu(*(tx_ring->hw_consumer));
952 done = (sw_consumer == hw_consumer);
953
954 spin_unlock(&tx_ring->tx_clean_lock);
955
956 return done;
957}
958
959static int qlcnic_poll(struct napi_struct *napi, int budget)
960{
961 int tx_complete, work_done;
962 struct qlcnic_host_sds_ring *sds_ring;
963 struct qlcnic_adapter *adapter;
964 struct qlcnic_host_tx_ring *tx_ring;
965
966 sds_ring = container_of(napi, struct qlcnic_host_sds_ring, napi);
967 adapter = sds_ring->adapter;
968 tx_ring = sds_ring->tx_ring;
969
970 tx_complete = qlcnic_process_cmd_ring(adapter, tx_ring,
971 budget);
972 work_done = qlcnic_process_rcv_ring(sds_ring, budget);
973
974
975 if (!tx_complete)
976 work_done = budget;
977
978 if (work_done < budget) {
979 napi_complete_done(&sds_ring->napi, work_done);
980 if (test_bit(__QLCNIC_DEV_UP, &adapter->state)) {
981 qlcnic_enable_sds_intr(adapter, sds_ring);
982 qlcnic_enable_tx_intr(adapter, tx_ring);
983 }
984 }
985
986 return work_done;
987}
988
989static int qlcnic_tx_poll(struct napi_struct *napi, int budget)
990{
991 struct qlcnic_host_tx_ring *tx_ring;
992 struct qlcnic_adapter *adapter;
993 int work_done;
994
995 tx_ring = container_of(napi, struct qlcnic_host_tx_ring, napi);
996 adapter = tx_ring->adapter;
997
998 work_done = qlcnic_process_cmd_ring(adapter, tx_ring, budget);
999 if (work_done) {
1000 napi_complete(&tx_ring->napi);
1001 if (test_bit(__QLCNIC_DEV_UP, &adapter->state))
1002 qlcnic_enable_tx_intr(adapter, tx_ring);
1003 } else {
1004
1005 work_done = budget;
1006 }
1007
1008 return work_done;
1009}
1010
1011static int qlcnic_rx_poll(struct napi_struct *napi, int budget)
1012{
1013 struct qlcnic_host_sds_ring *sds_ring;
1014 struct qlcnic_adapter *adapter;
1015 int work_done;
1016
1017 sds_ring = container_of(napi, struct qlcnic_host_sds_ring, napi);
1018 adapter = sds_ring->adapter;
1019
1020 work_done = qlcnic_process_rcv_ring(sds_ring, budget);
1021
1022 if (work_done < budget) {
1023 napi_complete_done(&sds_ring->napi, work_done);
1024 if (test_bit(__QLCNIC_DEV_UP, &adapter->state))
1025 qlcnic_enable_sds_intr(adapter, sds_ring);
1026 }
1027
1028 return work_done;
1029}
1030
1031static void qlcnic_handle_linkevent(struct qlcnic_adapter *adapter,
1032 struct qlcnic_fw_msg *msg)
1033{
1034 u32 cable_OUI;
1035 u16 cable_len, link_speed;
1036 u8 link_status, module, duplex, autoneg, lb_status = 0;
1037 struct net_device *netdev = adapter->netdev;
1038
1039 adapter->ahw->has_link_events = 1;
1040
1041 cable_OUI = msg->body[1] & 0xffffffff;
1042 cable_len = (msg->body[1] >> 32) & 0xffff;
1043 link_speed = (msg->body[1] >> 48) & 0xffff;
1044
1045 link_status = msg->body[2] & 0xff;
1046 duplex = (msg->body[2] >> 16) & 0xff;
1047 autoneg = (msg->body[2] >> 24) & 0xff;
1048 lb_status = (msg->body[2] >> 32) & 0x3;
1049
1050 module = (msg->body[2] >> 8) & 0xff;
1051 if (module == LINKEVENT_MODULE_TWINAX_UNSUPPORTED_CABLE)
1052 dev_info(&netdev->dev,
1053 "unsupported cable: OUI 0x%x, length %d\n",
1054 cable_OUI, cable_len);
1055 else if (module == LINKEVENT_MODULE_TWINAX_UNSUPPORTED_CABLELEN)
1056 dev_info(&netdev->dev, "unsupported cable length %d\n",
1057 cable_len);
1058
1059 if (!link_status && (lb_status == QLCNIC_ILB_MODE ||
1060 lb_status == QLCNIC_ELB_MODE))
1061 adapter->ahw->loopback_state |= QLCNIC_LINKEVENT;
1062
1063 qlcnic_advert_link_change(adapter, link_status);
1064
1065 if (duplex == LINKEVENT_FULL_DUPLEX)
1066 adapter->ahw->link_duplex = DUPLEX_FULL;
1067 else
1068 adapter->ahw->link_duplex = DUPLEX_HALF;
1069
1070 adapter->ahw->module_type = module;
1071 adapter->ahw->link_autoneg = autoneg;
1072
1073 if (link_status) {
1074 adapter->ahw->link_speed = link_speed;
1075 } else {
1076 adapter->ahw->link_speed = SPEED_UNKNOWN;
1077 adapter->ahw->link_duplex = DUPLEX_UNKNOWN;
1078 }
1079}
1080
1081static void qlcnic_handle_fw_message(int desc_cnt, int index,
1082 struct qlcnic_host_sds_ring *sds_ring)
1083{
1084 struct qlcnic_fw_msg msg;
1085 struct status_desc *desc;
1086 struct qlcnic_adapter *adapter;
1087 struct device *dev;
1088 int i = 0, opcode, ret;
1089
1090 while (desc_cnt > 0 && i < 8) {
1091 desc = &sds_ring->desc_head[index];
1092 msg.words[i++] = le64_to_cpu(desc->status_desc_data[0]);
1093 msg.words[i++] = le64_to_cpu(desc->status_desc_data[1]);
1094
1095 index = get_next_index(index, sds_ring->num_desc);
1096 desc_cnt--;
1097 }
1098
1099 adapter = sds_ring->adapter;
1100 dev = &adapter->pdev->dev;
1101 opcode = qlcnic_get_nic_msg_opcode(msg.body[0]);
1102
1103 switch (opcode) {
1104 case QLCNIC_C2H_OPCODE_GET_LINKEVENT_RESPONSE:
1105 qlcnic_handle_linkevent(adapter, &msg);
1106 break;
1107 case QLCNIC_C2H_OPCODE_CONFIG_LOOPBACK:
1108 ret = (u32)(msg.body[1]);
1109 switch (ret) {
1110 case 0:
1111 adapter->ahw->loopback_state |= QLCNIC_LB_RESPONSE;
1112 break;
1113 case 1:
1114 dev_info(dev, "loopback already in progress\n");
1115 adapter->ahw->diag_cnt = -EINPROGRESS;
1116 break;
1117 case 2:
1118 dev_info(dev, "loopback cable is not connected\n");
1119 adapter->ahw->diag_cnt = -ENODEV;
1120 break;
1121 default:
1122 dev_info(dev,
1123 "loopback configure request failed, err %x\n",
1124 ret);
1125 adapter->ahw->diag_cnt = -EIO;
1126 break;
1127 }
1128 break;
1129 case QLCNIC_C2H_OPCODE_GET_DCB_AEN:
1130 qlcnic_dcb_aen_handler(adapter->dcb, (void *)&msg);
1131 break;
1132 default:
1133 break;
1134 }
1135}
1136
1137static struct sk_buff *qlcnic_process_rxbuf(struct qlcnic_adapter *adapter,
1138 struct qlcnic_host_rds_ring *ring,
1139 u16 index, u16 cksum)
1140{
1141 struct qlcnic_rx_buffer *buffer;
1142 struct sk_buff *skb;
1143
1144 buffer = &ring->rx_buf_arr[index];
1145 if (unlikely(buffer->skb == NULL)) {
1146 WARN_ON(1);
1147 return NULL;
1148 }
1149
1150 dma_unmap_single(&adapter->pdev->dev, buffer->dma, ring->dma_size,
1151 DMA_FROM_DEVICE);
1152
1153 skb = buffer->skb;
1154 if (likely((adapter->netdev->features & NETIF_F_RXCSUM) &&
1155 (cksum == STATUS_CKSUM_OK || cksum == STATUS_CKSUM_LOOP))) {
1156 adapter->stats.csummed++;
1157 skb->ip_summed = CHECKSUM_UNNECESSARY;
1158 } else {
1159 skb_checksum_none_assert(skb);
1160 }
1161
1162
1163 buffer->skb = NULL;
1164
1165 return skb;
1166}
1167
1168static inline int qlcnic_check_rx_tagging(struct qlcnic_adapter *adapter,
1169 struct sk_buff *skb, u16 *vlan_tag)
1170{
1171 struct ethhdr *eth_hdr;
1172
1173 if (!__vlan_get_tag(skb, vlan_tag)) {
1174 eth_hdr = (struct ethhdr *)skb->data;
1175 memmove(skb->data + VLAN_HLEN, eth_hdr, ETH_ALEN * 2);
1176 skb_pull(skb, VLAN_HLEN);
1177 }
1178 if (!adapter->rx_pvid)
1179 return 0;
1180
1181 if (*vlan_tag == adapter->rx_pvid) {
1182
1183 *vlan_tag = 0xffff;
1184 return 0;
1185 }
1186 if (adapter->flags & QLCNIC_TAGGING_ENABLED)
1187 return 0;
1188
1189 return -EINVAL;
1190}
1191
1192static struct qlcnic_rx_buffer *
1193qlcnic_process_rcv(struct qlcnic_adapter *adapter,
1194 struct qlcnic_host_sds_ring *sds_ring, int ring,
1195 u64 sts_data0)
1196{
1197 struct net_device *netdev = adapter->netdev;
1198 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1199 struct qlcnic_rx_buffer *buffer;
1200 struct sk_buff *skb;
1201 struct qlcnic_host_rds_ring *rds_ring;
1202 int index, length, cksum, pkt_offset, is_lb_pkt;
1203 u16 vid = 0xffff, t_vid;
1204
1205 if (unlikely(ring >= adapter->max_rds_rings))
1206 return NULL;
1207
1208 rds_ring = &recv_ctx->rds_rings[ring];
1209
1210 index = qlcnic_get_sts_refhandle(sts_data0);
1211 if (unlikely(index >= rds_ring->num_desc))
1212 return NULL;
1213
1214 buffer = &rds_ring->rx_buf_arr[index];
1215 length = qlcnic_get_sts_totallength(sts_data0);
1216 cksum = qlcnic_get_sts_status(sts_data0);
1217 pkt_offset = qlcnic_get_sts_pkt_offset(sts_data0);
1218
1219 skb = qlcnic_process_rxbuf(adapter, rds_ring, index, cksum);
1220 if (!skb)
1221 return buffer;
1222
1223 if (adapter->rx_mac_learn) {
1224 t_vid = 0;
1225 is_lb_pkt = qlcnic_82xx_is_lb_pkt(sts_data0);
1226 qlcnic_add_lb_filter(adapter, skb, is_lb_pkt, t_vid);
1227 }
1228
1229 if (length > rds_ring->skb_size)
1230 skb_put(skb, rds_ring->skb_size);
1231 else
1232 skb_put(skb, length);
1233
1234 if (pkt_offset)
1235 skb_pull(skb, pkt_offset);
1236
1237 if (unlikely(qlcnic_check_rx_tagging(adapter, skb, &vid))) {
1238 adapter->stats.rxdropped++;
1239 dev_kfree_skb(skb);
1240 return buffer;
1241 }
1242
1243 skb->protocol = eth_type_trans(skb, netdev);
1244
1245 if (vid != 0xffff)
1246 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid);
1247
1248 napi_gro_receive(&sds_ring->napi, skb);
1249
1250 adapter->stats.rx_pkts++;
1251 adapter->stats.rxbytes += length;
1252
1253 return buffer;
1254}
1255
1256#define QLC_TCP_HDR_SIZE 20
1257#define QLC_TCP_TS_OPTION_SIZE 12
1258#define QLC_TCP_TS_HDR_SIZE (QLC_TCP_HDR_SIZE + QLC_TCP_TS_OPTION_SIZE)
1259
1260static struct qlcnic_rx_buffer *
1261qlcnic_process_lro(struct qlcnic_adapter *adapter,
1262 int ring, u64 sts_data0, u64 sts_data1)
1263{
1264 struct net_device *netdev = adapter->netdev;
1265 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1266 struct qlcnic_rx_buffer *buffer;
1267 struct sk_buff *skb;
1268 struct qlcnic_host_rds_ring *rds_ring;
1269 struct iphdr *iph;
1270 struct ipv6hdr *ipv6h;
1271 struct tcphdr *th;
1272 bool push, timestamp;
1273 int index, l2_hdr_offset, l4_hdr_offset, is_lb_pkt;
1274 u16 lro_length, length, data_offset, t_vid, vid = 0xffff;
1275 u32 seq_number;
1276
1277 if (unlikely(ring >= adapter->max_rds_rings))
1278 return NULL;
1279
1280 rds_ring = &recv_ctx->rds_rings[ring];
1281
1282 index = qlcnic_get_lro_sts_refhandle(sts_data0);
1283 if (unlikely(index >= rds_ring->num_desc))
1284 return NULL;
1285
1286 buffer = &rds_ring->rx_buf_arr[index];
1287
1288 timestamp = qlcnic_get_lro_sts_timestamp(sts_data0);
1289 lro_length = qlcnic_get_lro_sts_length(sts_data0);
1290 l2_hdr_offset = qlcnic_get_lro_sts_l2_hdr_offset(sts_data0);
1291 l4_hdr_offset = qlcnic_get_lro_sts_l4_hdr_offset(sts_data0);
1292 push = qlcnic_get_lro_sts_push_flag(sts_data0);
1293 seq_number = qlcnic_get_lro_sts_seq_number(sts_data1);
1294
1295 skb = qlcnic_process_rxbuf(adapter, rds_ring, index, STATUS_CKSUM_OK);
1296 if (!skb)
1297 return buffer;
1298
1299 if (adapter->rx_mac_learn) {
1300 t_vid = 0;
1301 is_lb_pkt = qlcnic_82xx_is_lb_pkt(sts_data0);
1302 qlcnic_add_lb_filter(adapter, skb, is_lb_pkt, t_vid);
1303 }
1304
1305 if (timestamp)
1306 data_offset = l4_hdr_offset + QLC_TCP_TS_HDR_SIZE;
1307 else
1308 data_offset = l4_hdr_offset + QLC_TCP_HDR_SIZE;
1309
1310 skb_put(skb, lro_length + data_offset);
1311 skb_pull(skb, l2_hdr_offset);
1312
1313 if (unlikely(qlcnic_check_rx_tagging(adapter, skb, &vid))) {
1314 adapter->stats.rxdropped++;
1315 dev_kfree_skb(skb);
1316 return buffer;
1317 }
1318
1319 skb->protocol = eth_type_trans(skb, netdev);
1320
1321 if (ntohs(skb->protocol) == ETH_P_IPV6) {
1322 ipv6h = (struct ipv6hdr *)skb->data;
1323 th = (struct tcphdr *)(skb->data + sizeof(struct ipv6hdr));
1324 length = (th->doff << 2) + lro_length;
1325 ipv6h->payload_len = htons(length);
1326 } else {
1327 iph = (struct iphdr *)skb->data;
1328 th = (struct tcphdr *)(skb->data + (iph->ihl << 2));
1329 length = (iph->ihl << 2) + (th->doff << 2) + lro_length;
1330 csum_replace2(&iph->check, iph->tot_len, htons(length));
1331 iph->tot_len = htons(length);
1332 }
1333
1334 th->psh = push;
1335 th->seq = htonl(seq_number);
1336 length = skb->len;
1337
1338 if (adapter->flags & QLCNIC_FW_LRO_MSS_CAP) {
1339 skb_shinfo(skb)->gso_size = qlcnic_get_lro_sts_mss(sts_data1);
1340 if (skb->protocol == htons(ETH_P_IPV6))
1341 skb_shinfo(skb)->gso_type = SKB_GSO_TCPV6;
1342 else
1343 skb_shinfo(skb)->gso_type = SKB_GSO_TCPV4;
1344 }
1345
1346 if (vid != 0xffff)
1347 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid);
1348 netif_receive_skb(skb);
1349
1350 adapter->stats.lro_pkts++;
1351 adapter->stats.lrobytes += length;
1352
1353 return buffer;
1354}
1355
1356static int qlcnic_process_rcv_ring(struct qlcnic_host_sds_ring *sds_ring, int max)
1357{
1358 struct qlcnic_host_rds_ring *rds_ring;
1359 struct qlcnic_adapter *adapter = sds_ring->adapter;
1360 struct list_head *cur;
1361 struct status_desc *desc;
1362 struct qlcnic_rx_buffer *rxbuf;
1363 int opcode, desc_cnt, count = 0;
1364 u64 sts_data0, sts_data1;
1365 u8 ring;
1366 u32 consumer = sds_ring->consumer;
1367
1368 while (count < max) {
1369 desc = &sds_ring->desc_head[consumer];
1370 sts_data0 = le64_to_cpu(desc->status_desc_data[0]);
1371
1372 if (!(sts_data0 & STATUS_OWNER_HOST))
1373 break;
1374
1375 desc_cnt = qlcnic_get_sts_desc_cnt(sts_data0);
1376 opcode = qlcnic_get_sts_opcode(sts_data0);
1377 switch (opcode) {
1378 case QLCNIC_RXPKT_DESC:
1379 case QLCNIC_OLD_RXPKT_DESC:
1380 case QLCNIC_SYN_OFFLOAD:
1381 ring = qlcnic_get_sts_type(sts_data0);
1382 rxbuf = qlcnic_process_rcv(adapter, sds_ring, ring,
1383 sts_data0);
1384 break;
1385 case QLCNIC_LRO_DESC:
1386 ring = qlcnic_get_lro_sts_type(sts_data0);
1387 sts_data1 = le64_to_cpu(desc->status_desc_data[1]);
1388 rxbuf = qlcnic_process_lro(adapter, ring, sts_data0,
1389 sts_data1);
1390 break;
1391 case QLCNIC_RESPONSE_DESC:
1392 qlcnic_handle_fw_message(desc_cnt, consumer, sds_ring);
1393 goto skip;
1394 default:
1395 goto skip;
1396 }
1397 WARN_ON(desc_cnt > 1);
1398
1399 if (likely(rxbuf))
1400 list_add_tail(&rxbuf->list, &sds_ring->free_list[ring]);
1401 else
1402 adapter->stats.null_rxbuf++;
1403skip:
1404 for (; desc_cnt > 0; desc_cnt--) {
1405 desc = &sds_ring->desc_head[consumer];
1406 desc->status_desc_data[0] = QLCNIC_DESC_OWNER_FW;
1407 consumer = get_next_index(consumer, sds_ring->num_desc);
1408 }
1409 count++;
1410 }
1411
1412 for (ring = 0; ring < adapter->max_rds_rings; ring++) {
1413 rds_ring = &adapter->recv_ctx->rds_rings[ring];
1414 if (!list_empty(&sds_ring->free_list[ring])) {
1415 list_for_each(cur, &sds_ring->free_list[ring]) {
1416 rxbuf = list_entry(cur, struct qlcnic_rx_buffer,
1417 list);
1418 qlcnic_alloc_rx_skb(adapter, rds_ring, rxbuf);
1419 }
1420 spin_lock(&rds_ring->lock);
1421 list_splice_tail_init(&sds_ring->free_list[ring],
1422 &rds_ring->free_list);
1423 spin_unlock(&rds_ring->lock);
1424 }
1425
1426 qlcnic_post_rx_buffers_nodb(adapter, rds_ring, ring);
1427 }
1428
1429 if (count) {
1430 sds_ring->consumer = consumer;
1431 writel(consumer, sds_ring->crb_sts_consumer);
1432 }
1433
1434 return count;
1435}
1436
1437void qlcnic_post_rx_buffers(struct qlcnic_adapter *adapter,
1438 struct qlcnic_host_rds_ring *rds_ring, u8 ring_id)
1439{
1440 struct rcv_desc *pdesc;
1441 struct qlcnic_rx_buffer *buffer;
1442 int count = 0;
1443 u32 producer, handle;
1444 struct list_head *head;
1445
1446 producer = rds_ring->producer;
1447 head = &rds_ring->free_list;
1448
1449 while (!list_empty(head)) {
1450
1451 buffer = list_entry(head->next, struct qlcnic_rx_buffer, list);
1452
1453 if (!buffer->skb) {
1454 if (qlcnic_alloc_rx_skb(adapter, rds_ring, buffer))
1455 break;
1456 }
1457
1458 count++;
1459 list_del(&buffer->list);
1460
1461
1462 pdesc = &rds_ring->desc_head[producer];
1463 pdesc->addr_buffer = cpu_to_le64(buffer->dma);
1464 handle = qlcnic_get_ref_handle(adapter, buffer->ref_handle,
1465 ring_id);
1466 pdesc->reference_handle = cpu_to_le16(handle);
1467 pdesc->buffer_length = cpu_to_le32(rds_ring->dma_size);
1468 producer = get_next_index(producer, rds_ring->num_desc);
1469 }
1470
1471 if (count) {
1472 rds_ring->producer = producer;
1473 writel((producer-1) & (rds_ring->num_desc-1),
1474 rds_ring->crb_rcv_producer);
1475 }
1476}
1477
1478static void dump_skb(struct sk_buff *skb, struct qlcnic_adapter *adapter)
1479{
1480 if (adapter->ahw->msg_enable & NETIF_MSG_DRV) {
1481 char prefix[30];
1482
1483 scnprintf(prefix, sizeof(prefix), "%s: %s: ",
1484 dev_name(&adapter->pdev->dev), __func__);
1485
1486 print_hex_dump_debug(prefix, DUMP_PREFIX_NONE, 16, 1,
1487 skb->data, skb->len, true);
1488 }
1489}
1490
1491static void qlcnic_process_rcv_diag(struct qlcnic_adapter *adapter, int ring,
1492 u64 sts_data0)
1493{
1494 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1495 struct sk_buff *skb;
1496 struct qlcnic_host_rds_ring *rds_ring;
1497 int index, length, cksum, pkt_offset;
1498
1499 if (unlikely(ring >= adapter->max_rds_rings))
1500 return;
1501
1502 rds_ring = &recv_ctx->rds_rings[ring];
1503
1504 index = qlcnic_get_sts_refhandle(sts_data0);
1505 length = qlcnic_get_sts_totallength(sts_data0);
1506 if (unlikely(index >= rds_ring->num_desc))
1507 return;
1508
1509 cksum = qlcnic_get_sts_status(sts_data0);
1510 pkt_offset = qlcnic_get_sts_pkt_offset(sts_data0);
1511
1512 skb = qlcnic_process_rxbuf(adapter, rds_ring, index, cksum);
1513 if (!skb)
1514 return;
1515
1516 if (length > rds_ring->skb_size)
1517 skb_put(skb, rds_ring->skb_size);
1518 else
1519 skb_put(skb, length);
1520
1521 if (pkt_offset)
1522 skb_pull(skb, pkt_offset);
1523
1524 if (!qlcnic_check_loopback_buff(skb->data, adapter->mac_addr))
1525 adapter->ahw->diag_cnt++;
1526 else
1527 dump_skb(skb, adapter);
1528
1529 dev_kfree_skb_any(skb);
1530 adapter->stats.rx_pkts++;
1531 adapter->stats.rxbytes += length;
1532
1533 return;
1534}
1535
1536void qlcnic_82xx_process_rcv_ring_diag(struct qlcnic_host_sds_ring *sds_ring)
1537{
1538 struct qlcnic_adapter *adapter = sds_ring->adapter;
1539 struct status_desc *desc;
1540 u64 sts_data0;
1541 int ring, opcode, desc_cnt;
1542
1543 u32 consumer = sds_ring->consumer;
1544
1545 desc = &sds_ring->desc_head[consumer];
1546 sts_data0 = le64_to_cpu(desc->status_desc_data[0]);
1547
1548 if (!(sts_data0 & STATUS_OWNER_HOST))
1549 return;
1550
1551 desc_cnt = qlcnic_get_sts_desc_cnt(sts_data0);
1552 opcode = qlcnic_get_sts_opcode(sts_data0);
1553 switch (opcode) {
1554 case QLCNIC_RESPONSE_DESC:
1555 qlcnic_handle_fw_message(desc_cnt, consumer, sds_ring);
1556 break;
1557 default:
1558 ring = qlcnic_get_sts_type(sts_data0);
1559 qlcnic_process_rcv_diag(adapter, ring, sts_data0);
1560 break;
1561 }
1562
1563 for (; desc_cnt > 0; desc_cnt--) {
1564 desc = &sds_ring->desc_head[consumer];
1565 desc->status_desc_data[0] = cpu_to_le64(STATUS_OWNER_PHANTOM);
1566 consumer = get_next_index(consumer, sds_ring->num_desc);
1567 }
1568
1569 sds_ring->consumer = consumer;
1570 writel(consumer, sds_ring->crb_sts_consumer);
1571}
1572
1573int qlcnic_82xx_napi_add(struct qlcnic_adapter *adapter,
1574 struct net_device *netdev)
1575{
1576 int ring;
1577 struct qlcnic_host_sds_ring *sds_ring;
1578 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1579 struct qlcnic_host_tx_ring *tx_ring;
1580
1581 if (qlcnic_alloc_sds_rings(recv_ctx, adapter->drv_sds_rings))
1582 return -ENOMEM;
1583
1584 for (ring = 0; ring < adapter->drv_sds_rings; ring++) {
1585 sds_ring = &recv_ctx->sds_rings[ring];
1586 if (qlcnic_check_multi_tx(adapter) &&
1587 !adapter->ahw->diag_test) {
1588 netif_napi_add(netdev, &sds_ring->napi, qlcnic_rx_poll,
1589 NAPI_POLL_WEIGHT);
1590 } else {
1591 if (ring == (adapter->drv_sds_rings - 1))
1592 netif_napi_add(netdev, &sds_ring->napi,
1593 qlcnic_poll,
1594 NAPI_POLL_WEIGHT);
1595 else
1596 netif_napi_add(netdev, &sds_ring->napi,
1597 qlcnic_rx_poll,
1598 NAPI_POLL_WEIGHT);
1599 }
1600 }
1601
1602 if (qlcnic_alloc_tx_rings(adapter, netdev)) {
1603 qlcnic_free_sds_rings(recv_ctx);
1604 return -ENOMEM;
1605 }
1606
1607 if (qlcnic_check_multi_tx(adapter) && !adapter->ahw->diag_test) {
1608 for (ring = 0; ring < adapter->drv_tx_rings; ring++) {
1609 tx_ring = &adapter->tx_ring[ring];
1610 netif_tx_napi_add(netdev, &tx_ring->napi, qlcnic_tx_poll,
1611 NAPI_POLL_WEIGHT);
1612 }
1613 }
1614
1615 return 0;
1616}
1617
1618void qlcnic_82xx_napi_del(struct qlcnic_adapter *adapter)
1619{
1620 int ring;
1621 struct qlcnic_host_sds_ring *sds_ring;
1622 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1623 struct qlcnic_host_tx_ring *tx_ring;
1624
1625 for (ring = 0; ring < adapter->drv_sds_rings; ring++) {
1626 sds_ring = &recv_ctx->sds_rings[ring];
1627 netif_napi_del(&sds_ring->napi);
1628 }
1629
1630 qlcnic_free_sds_rings(adapter->recv_ctx);
1631
1632 if (qlcnic_check_multi_tx(adapter) && !adapter->ahw->diag_test) {
1633 for (ring = 0; ring < adapter->drv_tx_rings; ring++) {
1634 tx_ring = &adapter->tx_ring[ring];
1635 netif_napi_del(&tx_ring->napi);
1636 }
1637 }
1638
1639 qlcnic_free_tx_rings(adapter);
1640}
1641
1642void qlcnic_82xx_napi_enable(struct qlcnic_adapter *adapter)
1643{
1644 int ring;
1645 struct qlcnic_host_sds_ring *sds_ring;
1646 struct qlcnic_host_tx_ring *tx_ring;
1647 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1648
1649 if (adapter->is_up != QLCNIC_ADAPTER_UP_MAGIC)
1650 return;
1651
1652 for (ring = 0; ring < adapter->drv_sds_rings; ring++) {
1653 sds_ring = &recv_ctx->sds_rings[ring];
1654 napi_enable(&sds_ring->napi);
1655 qlcnic_enable_sds_intr(adapter, sds_ring);
1656 }
1657
1658 if (qlcnic_check_multi_tx(adapter) &&
1659 (adapter->flags & QLCNIC_MSIX_ENABLED) &&
1660 !adapter->ahw->diag_test) {
1661 for (ring = 0; ring < adapter->drv_tx_rings; ring++) {
1662 tx_ring = &adapter->tx_ring[ring];
1663 napi_enable(&tx_ring->napi);
1664 qlcnic_enable_tx_intr(adapter, tx_ring);
1665 }
1666 }
1667}
1668
1669void qlcnic_82xx_napi_disable(struct qlcnic_adapter *adapter)
1670{
1671 int ring;
1672 struct qlcnic_host_sds_ring *sds_ring;
1673 struct qlcnic_host_tx_ring *tx_ring;
1674 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1675
1676 if (adapter->is_up != QLCNIC_ADAPTER_UP_MAGIC)
1677 return;
1678
1679 for (ring = 0; ring < adapter->drv_sds_rings; ring++) {
1680 sds_ring = &recv_ctx->sds_rings[ring];
1681 qlcnic_disable_sds_intr(adapter, sds_ring);
1682 napi_synchronize(&sds_ring->napi);
1683 napi_disable(&sds_ring->napi);
1684 }
1685
1686 if ((adapter->flags & QLCNIC_MSIX_ENABLED) &&
1687 !adapter->ahw->diag_test &&
1688 qlcnic_check_multi_tx(adapter)) {
1689 for (ring = 0; ring < adapter->drv_tx_rings; ring++) {
1690 tx_ring = &adapter->tx_ring[ring];
1691 qlcnic_disable_tx_intr(adapter, tx_ring);
1692 napi_synchronize(&tx_ring->napi);
1693 napi_disable(&tx_ring->napi);
1694 }
1695 }
1696}
1697
1698#define QLC_83XX_NORMAL_LB_PKT (1ULL << 36)
1699#define QLC_83XX_LRO_LB_PKT (1ULL << 46)
1700
1701static inline int qlcnic_83xx_is_lb_pkt(u64 sts_data, int lro_pkt)
1702{
1703 if (lro_pkt)
1704 return (sts_data & QLC_83XX_LRO_LB_PKT) ? 1 : 0;
1705 else
1706 return (sts_data & QLC_83XX_NORMAL_LB_PKT) ? 1 : 0;
1707}
1708
1709#define QLCNIC_ENCAP_LENGTH_MASK 0x7f
1710
1711static inline u8 qlcnic_encap_length(u64 sts_data)
1712{
1713 return sts_data & QLCNIC_ENCAP_LENGTH_MASK;
1714}
1715
1716static struct qlcnic_rx_buffer *
1717qlcnic_83xx_process_rcv(struct qlcnic_adapter *adapter,
1718 struct qlcnic_host_sds_ring *sds_ring,
1719 u8 ring, u64 sts_data[])
1720{
1721 struct net_device *netdev = adapter->netdev;
1722 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1723 struct qlcnic_rx_buffer *buffer;
1724 struct sk_buff *skb;
1725 struct qlcnic_host_rds_ring *rds_ring;
1726 int index, length, cksum, is_lb_pkt;
1727 u16 vid = 0xffff;
1728 int err;
1729
1730 if (unlikely(ring >= adapter->max_rds_rings))
1731 return NULL;
1732
1733 rds_ring = &recv_ctx->rds_rings[ring];
1734
1735 index = qlcnic_83xx_hndl(sts_data[0]);
1736 if (unlikely(index >= rds_ring->num_desc))
1737 return NULL;
1738
1739 buffer = &rds_ring->rx_buf_arr[index];
1740 length = qlcnic_83xx_pktln(sts_data[0]);
1741 cksum = qlcnic_83xx_csum_status(sts_data[1]);
1742 skb = qlcnic_process_rxbuf(adapter, rds_ring, index, cksum);
1743 if (!skb)
1744 return buffer;
1745
1746 if (length > rds_ring->skb_size)
1747 skb_put(skb, rds_ring->skb_size);
1748 else
1749 skb_put(skb, length);
1750
1751 err = qlcnic_check_rx_tagging(adapter, skb, &vid);
1752
1753 if (adapter->rx_mac_learn) {
1754 is_lb_pkt = qlcnic_83xx_is_lb_pkt(sts_data[1], 0);
1755 qlcnic_add_lb_filter(adapter, skb, is_lb_pkt, vid);
1756 }
1757
1758 if (unlikely(err)) {
1759 adapter->stats.rxdropped++;
1760 dev_kfree_skb(skb);
1761 return buffer;
1762 }
1763
1764 skb->protocol = eth_type_trans(skb, netdev);
1765
1766 if (qlcnic_encap_length(sts_data[1]) &&
1767 skb->ip_summed == CHECKSUM_UNNECESSARY) {
1768 skb->csum_level = 1;
1769 adapter->stats.encap_rx_csummed++;
1770 }
1771
1772 if (vid != 0xffff)
1773 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid);
1774
1775 napi_gro_receive(&sds_ring->napi, skb);
1776
1777 adapter->stats.rx_pkts++;
1778 adapter->stats.rxbytes += length;
1779
1780 return buffer;
1781}
1782
1783static struct qlcnic_rx_buffer *
1784qlcnic_83xx_process_lro(struct qlcnic_adapter *adapter,
1785 u8 ring, u64 sts_data[])
1786{
1787 struct net_device *netdev = adapter->netdev;
1788 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1789 struct qlcnic_rx_buffer *buffer;
1790 struct sk_buff *skb;
1791 struct qlcnic_host_rds_ring *rds_ring;
1792 struct iphdr *iph;
1793 struct ipv6hdr *ipv6h;
1794 struct tcphdr *th;
1795 bool push;
1796 int l2_hdr_offset, l4_hdr_offset;
1797 int index, is_lb_pkt;
1798 u16 lro_length, length, data_offset, gso_size;
1799 u16 vid = 0xffff;
1800 int err;
1801
1802 if (unlikely(ring >= adapter->max_rds_rings))
1803 return NULL;
1804
1805 rds_ring = &recv_ctx->rds_rings[ring];
1806
1807 index = qlcnic_83xx_hndl(sts_data[0]);
1808 if (unlikely(index >= rds_ring->num_desc))
1809 return NULL;
1810
1811 buffer = &rds_ring->rx_buf_arr[index];
1812
1813 lro_length = qlcnic_83xx_lro_pktln(sts_data[0]);
1814 l2_hdr_offset = qlcnic_83xx_l2_hdr_off(sts_data[1]);
1815 l4_hdr_offset = qlcnic_83xx_l4_hdr_off(sts_data[1]);
1816 push = qlcnic_83xx_is_psh_bit(sts_data[1]);
1817
1818 skb = qlcnic_process_rxbuf(adapter, rds_ring, index, STATUS_CKSUM_OK);
1819 if (!skb)
1820 return buffer;
1821
1822 if (qlcnic_83xx_is_tstamp(sts_data[1]))
1823 data_offset = l4_hdr_offset + QLCNIC_TCP_TS_HDR_SIZE;
1824 else
1825 data_offset = l4_hdr_offset + QLCNIC_TCP_HDR_SIZE;
1826
1827 skb_put(skb, lro_length + data_offset);
1828 skb_pull(skb, l2_hdr_offset);
1829
1830 err = qlcnic_check_rx_tagging(adapter, skb, &vid);
1831
1832 if (adapter->rx_mac_learn) {
1833 is_lb_pkt = qlcnic_83xx_is_lb_pkt(sts_data[1], 1);
1834 qlcnic_add_lb_filter(adapter, skb, is_lb_pkt, vid);
1835 }
1836
1837 if (unlikely(err)) {
1838 adapter->stats.rxdropped++;
1839 dev_kfree_skb(skb);
1840 return buffer;
1841 }
1842
1843 skb->protocol = eth_type_trans(skb, netdev);
1844 if (ntohs(skb->protocol) == ETH_P_IPV6) {
1845 ipv6h = (struct ipv6hdr *)skb->data;
1846 th = (struct tcphdr *)(skb->data + sizeof(struct ipv6hdr));
1847
1848 length = (th->doff << 2) + lro_length;
1849 ipv6h->payload_len = htons(length);
1850 } else {
1851 iph = (struct iphdr *)skb->data;
1852 th = (struct tcphdr *)(skb->data + (iph->ihl << 2));
1853 length = (iph->ihl << 2) + (th->doff << 2) + lro_length;
1854 csum_replace2(&iph->check, iph->tot_len, htons(length));
1855 iph->tot_len = htons(length);
1856 }
1857
1858 th->psh = push;
1859 length = skb->len;
1860
1861 if (adapter->flags & QLCNIC_FW_LRO_MSS_CAP) {
1862 gso_size = qlcnic_83xx_get_lro_sts_mss(sts_data[0]);
1863 skb_shinfo(skb)->gso_size = gso_size;
1864 if (skb->protocol == htons(ETH_P_IPV6))
1865 skb_shinfo(skb)->gso_type = SKB_GSO_TCPV6;
1866 else
1867 skb_shinfo(skb)->gso_type = SKB_GSO_TCPV4;
1868 }
1869
1870 if (vid != 0xffff)
1871 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid);
1872
1873 netif_receive_skb(skb);
1874
1875 adapter->stats.lro_pkts++;
1876 adapter->stats.lrobytes += length;
1877 return buffer;
1878}
1879
1880static int qlcnic_83xx_process_rcv_ring(struct qlcnic_host_sds_ring *sds_ring,
1881 int max)
1882{
1883 struct qlcnic_host_rds_ring *rds_ring;
1884 struct qlcnic_adapter *adapter = sds_ring->adapter;
1885 struct list_head *cur;
1886 struct status_desc *desc;
1887 struct qlcnic_rx_buffer *rxbuf = NULL;
1888 u8 ring;
1889 u64 sts_data[2];
1890 int count = 0, opcode;
1891 u32 consumer = sds_ring->consumer;
1892
1893 while (count < max) {
1894 desc = &sds_ring->desc_head[consumer];
1895 sts_data[1] = le64_to_cpu(desc->status_desc_data[1]);
1896 opcode = qlcnic_83xx_opcode(sts_data[1]);
1897 if (!opcode)
1898 break;
1899 sts_data[0] = le64_to_cpu(desc->status_desc_data[0]);
1900 ring = QLCNIC_FETCH_RING_ID(sts_data[0]);
1901
1902 switch (opcode) {
1903 case QLC_83XX_REG_DESC:
1904 rxbuf = qlcnic_83xx_process_rcv(adapter, sds_ring,
1905 ring, sts_data);
1906 break;
1907 case QLC_83XX_LRO_DESC:
1908 rxbuf = qlcnic_83xx_process_lro(adapter, ring,
1909 sts_data);
1910 break;
1911 default:
1912 dev_info(&adapter->pdev->dev,
1913 "Unknown opcode: 0x%x\n", opcode);
1914 goto skip;
1915 }
1916
1917 if (likely(rxbuf))
1918 list_add_tail(&rxbuf->list, &sds_ring->free_list[ring]);
1919 else
1920 adapter->stats.null_rxbuf++;
1921skip:
1922 desc = &sds_ring->desc_head[consumer];
1923
1924 desc->status_desc_data[1] = 0;
1925 consumer = get_next_index(consumer, sds_ring->num_desc);
1926 count++;
1927 }
1928 for (ring = 0; ring < adapter->max_rds_rings; ring++) {
1929 rds_ring = &adapter->recv_ctx->rds_rings[ring];
1930 if (!list_empty(&sds_ring->free_list[ring])) {
1931 list_for_each(cur, &sds_ring->free_list[ring]) {
1932 rxbuf = list_entry(cur, struct qlcnic_rx_buffer,
1933 list);
1934 qlcnic_alloc_rx_skb(adapter, rds_ring, rxbuf);
1935 }
1936 spin_lock(&rds_ring->lock);
1937 list_splice_tail_init(&sds_ring->free_list[ring],
1938 &rds_ring->free_list);
1939 spin_unlock(&rds_ring->lock);
1940 }
1941 qlcnic_post_rx_buffers_nodb(adapter, rds_ring, ring);
1942 }
1943 if (count) {
1944 sds_ring->consumer = consumer;
1945 writel(consumer, sds_ring->crb_sts_consumer);
1946 }
1947 return count;
1948}
1949
1950static int qlcnic_83xx_msix_sriov_vf_poll(struct napi_struct *napi, int budget)
1951{
1952 int tx_complete;
1953 int work_done;
1954 struct qlcnic_host_sds_ring *sds_ring;
1955 struct qlcnic_adapter *adapter;
1956 struct qlcnic_host_tx_ring *tx_ring;
1957
1958 sds_ring = container_of(napi, struct qlcnic_host_sds_ring, napi);
1959 adapter = sds_ring->adapter;
1960
1961 tx_ring = adapter->tx_ring;
1962
1963 tx_complete = qlcnic_process_cmd_ring(adapter, tx_ring, budget);
1964 work_done = qlcnic_83xx_process_rcv_ring(sds_ring, budget);
1965
1966
1967 if (!tx_complete)
1968 work_done = budget;
1969
1970 if (work_done < budget) {
1971 napi_complete_done(&sds_ring->napi, work_done);
1972 qlcnic_enable_sds_intr(adapter, sds_ring);
1973 }
1974
1975 return work_done;
1976}
1977
1978static int qlcnic_83xx_poll(struct napi_struct *napi, int budget)
1979{
1980 int tx_complete;
1981 int work_done;
1982 struct qlcnic_host_sds_ring *sds_ring;
1983 struct qlcnic_adapter *adapter;
1984 struct qlcnic_host_tx_ring *tx_ring;
1985
1986 sds_ring = container_of(napi, struct qlcnic_host_sds_ring, napi);
1987 adapter = sds_ring->adapter;
1988
1989 tx_ring = adapter->tx_ring;
1990
1991 tx_complete = qlcnic_process_cmd_ring(adapter, tx_ring, budget);
1992 work_done = qlcnic_83xx_process_rcv_ring(sds_ring, budget);
1993
1994
1995 if (!tx_complete)
1996 work_done = budget;
1997
1998 if (work_done < budget) {
1999 napi_complete_done(&sds_ring->napi, work_done);
2000 qlcnic_enable_sds_intr(adapter, sds_ring);
2001 }
2002
2003 return work_done;
2004}
2005
2006static int qlcnic_83xx_msix_tx_poll(struct napi_struct *napi, int budget)
2007{
2008 int work_done;
2009 struct qlcnic_host_tx_ring *tx_ring;
2010 struct qlcnic_adapter *adapter;
2011
2012 tx_ring = container_of(napi, struct qlcnic_host_tx_ring, napi);
2013 adapter = tx_ring->adapter;
2014 work_done = qlcnic_process_cmd_ring(adapter, tx_ring, budget);
2015 if (work_done) {
2016 napi_complete(&tx_ring->napi);
2017 if (test_bit(__QLCNIC_DEV_UP , &adapter->state))
2018 qlcnic_enable_tx_intr(adapter, tx_ring);
2019 } else {
2020
2021 work_done = budget;
2022 }
2023
2024 return work_done;
2025}
2026
2027static int qlcnic_83xx_rx_poll(struct napi_struct *napi, int budget)
2028{
2029 int work_done;
2030 struct qlcnic_host_sds_ring *sds_ring;
2031 struct qlcnic_adapter *adapter;
2032
2033 sds_ring = container_of(napi, struct qlcnic_host_sds_ring, napi);
2034 adapter = sds_ring->adapter;
2035 work_done = qlcnic_83xx_process_rcv_ring(sds_ring, budget);
2036 if (work_done < budget) {
2037 napi_complete_done(&sds_ring->napi, work_done);
2038 if (test_bit(__QLCNIC_DEV_UP, &adapter->state))
2039 qlcnic_enable_sds_intr(adapter, sds_ring);
2040 }
2041
2042 return work_done;
2043}
2044
2045void qlcnic_83xx_napi_enable(struct qlcnic_adapter *adapter)
2046{
2047 int ring;
2048 struct qlcnic_host_sds_ring *sds_ring;
2049 struct qlcnic_host_tx_ring *tx_ring;
2050 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
2051
2052 if (adapter->is_up != QLCNIC_ADAPTER_UP_MAGIC)
2053 return;
2054
2055 for (ring = 0; ring < adapter->drv_sds_rings; ring++) {
2056 sds_ring = &recv_ctx->sds_rings[ring];
2057 napi_enable(&sds_ring->napi);
2058 if (adapter->flags & QLCNIC_MSIX_ENABLED)
2059 qlcnic_enable_sds_intr(adapter, sds_ring);
2060 }
2061
2062 if ((adapter->flags & QLCNIC_MSIX_ENABLED) &&
2063 !(adapter->flags & QLCNIC_TX_INTR_SHARED)) {
2064 for (ring = 0; ring < adapter->drv_tx_rings; ring++) {
2065 tx_ring = &adapter->tx_ring[ring];
2066 napi_enable(&tx_ring->napi);
2067 qlcnic_enable_tx_intr(adapter, tx_ring);
2068 }
2069 }
2070}
2071
2072void qlcnic_83xx_napi_disable(struct qlcnic_adapter *adapter)
2073{
2074 int ring;
2075 struct qlcnic_host_sds_ring *sds_ring;
2076 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
2077 struct qlcnic_host_tx_ring *tx_ring;
2078
2079 if (adapter->is_up != QLCNIC_ADAPTER_UP_MAGIC)
2080 return;
2081
2082 for (ring = 0; ring < adapter->drv_sds_rings; ring++) {
2083 sds_ring = &recv_ctx->sds_rings[ring];
2084 if (adapter->flags & QLCNIC_MSIX_ENABLED)
2085 qlcnic_disable_sds_intr(adapter, sds_ring);
2086 napi_synchronize(&sds_ring->napi);
2087 napi_disable(&sds_ring->napi);
2088 }
2089
2090 if ((adapter->flags & QLCNIC_MSIX_ENABLED) &&
2091 !(adapter->flags & QLCNIC_TX_INTR_SHARED)) {
2092 for (ring = 0; ring < adapter->drv_tx_rings; ring++) {
2093 tx_ring = &adapter->tx_ring[ring];
2094 qlcnic_disable_tx_intr(adapter, tx_ring);
2095 napi_synchronize(&tx_ring->napi);
2096 napi_disable(&tx_ring->napi);
2097 }
2098 }
2099}
2100
2101int qlcnic_83xx_napi_add(struct qlcnic_adapter *adapter,
2102 struct net_device *netdev)
2103{
2104 int ring;
2105 struct qlcnic_host_sds_ring *sds_ring;
2106 struct qlcnic_host_tx_ring *tx_ring;
2107 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
2108
2109 if (qlcnic_alloc_sds_rings(recv_ctx, adapter->drv_sds_rings))
2110 return -ENOMEM;
2111
2112 for (ring = 0; ring < adapter->drv_sds_rings; ring++) {
2113 sds_ring = &recv_ctx->sds_rings[ring];
2114 if (adapter->flags & QLCNIC_MSIX_ENABLED) {
2115 if (!(adapter->flags & QLCNIC_TX_INTR_SHARED))
2116 netif_napi_add(netdev, &sds_ring->napi,
2117 qlcnic_83xx_rx_poll,
2118 NAPI_POLL_WEIGHT);
2119 else
2120 netif_napi_add(netdev, &sds_ring->napi,
2121 qlcnic_83xx_msix_sriov_vf_poll,
2122 NAPI_POLL_WEIGHT);
2123
2124 } else {
2125 netif_napi_add(netdev, &sds_ring->napi,
2126 qlcnic_83xx_poll,
2127 NAPI_POLL_WEIGHT);
2128 }
2129 }
2130
2131 if (qlcnic_alloc_tx_rings(adapter, netdev)) {
2132 qlcnic_free_sds_rings(recv_ctx);
2133 return -ENOMEM;
2134 }
2135
2136 if ((adapter->flags & QLCNIC_MSIX_ENABLED) &&
2137 !(adapter->flags & QLCNIC_TX_INTR_SHARED)) {
2138 for (ring = 0; ring < adapter->drv_tx_rings; ring++) {
2139 tx_ring = &adapter->tx_ring[ring];
2140 netif_tx_napi_add(netdev, &tx_ring->napi,
2141 qlcnic_83xx_msix_tx_poll,
2142 NAPI_POLL_WEIGHT);
2143 }
2144 }
2145
2146 return 0;
2147}
2148
2149void qlcnic_83xx_napi_del(struct qlcnic_adapter *adapter)
2150{
2151 int ring;
2152 struct qlcnic_host_sds_ring *sds_ring;
2153 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
2154 struct qlcnic_host_tx_ring *tx_ring;
2155
2156 for (ring = 0; ring < adapter->drv_sds_rings; ring++) {
2157 sds_ring = &recv_ctx->sds_rings[ring];
2158 netif_napi_del(&sds_ring->napi);
2159 }
2160
2161 qlcnic_free_sds_rings(adapter->recv_ctx);
2162
2163 if ((adapter->flags & QLCNIC_MSIX_ENABLED) &&
2164 !(adapter->flags & QLCNIC_TX_INTR_SHARED)) {
2165 for (ring = 0; ring < adapter->drv_tx_rings; ring++) {
2166 tx_ring = &adapter->tx_ring[ring];
2167 netif_napi_del(&tx_ring->napi);
2168 }
2169 }
2170
2171 qlcnic_free_tx_rings(adapter);
2172}
2173
2174static void qlcnic_83xx_process_rcv_diag(struct qlcnic_adapter *adapter,
2175 int ring, u64 sts_data[])
2176{
2177 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
2178 struct sk_buff *skb;
2179 struct qlcnic_host_rds_ring *rds_ring;
2180 int index, length;
2181
2182 if (unlikely(ring >= adapter->max_rds_rings))
2183 return;
2184
2185 rds_ring = &recv_ctx->rds_rings[ring];
2186 index = qlcnic_83xx_hndl(sts_data[0]);
2187 if (unlikely(index >= rds_ring->num_desc))
2188 return;
2189
2190 length = qlcnic_83xx_pktln(sts_data[0]);
2191
2192 skb = qlcnic_process_rxbuf(adapter, rds_ring, index, STATUS_CKSUM_OK);
2193 if (!skb)
2194 return;
2195
2196 if (length > rds_ring->skb_size)
2197 skb_put(skb, rds_ring->skb_size);
2198 else
2199 skb_put(skb, length);
2200
2201 if (!qlcnic_check_loopback_buff(skb->data, adapter->mac_addr))
2202 adapter->ahw->diag_cnt++;
2203 else
2204 dump_skb(skb, adapter);
2205
2206 dev_kfree_skb_any(skb);
2207 return;
2208}
2209
2210void qlcnic_83xx_process_rcv_ring_diag(struct qlcnic_host_sds_ring *sds_ring)
2211{
2212 struct qlcnic_adapter *adapter = sds_ring->adapter;
2213 struct status_desc *desc;
2214 u64 sts_data[2];
2215 int ring, opcode;
2216 u32 consumer = sds_ring->consumer;
2217
2218 desc = &sds_ring->desc_head[consumer];
2219 sts_data[0] = le64_to_cpu(desc->status_desc_data[0]);
2220 sts_data[1] = le64_to_cpu(desc->status_desc_data[1]);
2221 opcode = qlcnic_83xx_opcode(sts_data[1]);
2222 if (!opcode)
2223 return;
2224
2225 ring = QLCNIC_FETCH_RING_ID(sts_data[0]);
2226 qlcnic_83xx_process_rcv_diag(adapter, ring, sts_data);
2227 desc = &sds_ring->desc_head[consumer];
2228 desc->status_desc_data[0] = cpu_to_le64(STATUS_OWNER_PHANTOM);
2229 consumer = get_next_index(consumer, sds_ring->num_desc);
2230 sds_ring->consumer = consumer;
2231 writel(consumer, sds_ring->crb_sts_consumer);
2232}
2233
