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1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * QLogic qlcnic NIC Driver
4 * Copyright (c) 2009-2013 QLogic Corporation
5 */
6
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#include <linux/jiffies.h>
14
15#include "qlcnic.h"
16
17#define QLCNIC_TX_ETHER_PKT 0x01
18#define QLCNIC_TX_TCP_PKT 0x02
19#define QLCNIC_TX_UDP_PKT 0x03
20#define QLCNIC_TX_IP_PKT 0x04
21#define QLCNIC_TX_TCP_LSO 0x05
22#define QLCNIC_TX_TCP_LSO6 0x06
23#define QLCNIC_TX_ENCAP_PKT 0x07
24#define QLCNIC_TX_ENCAP_LSO 0x08
25#define QLCNIC_TX_TCPV6_PKT 0x0b
26#define QLCNIC_TX_UDPV6_PKT 0x0c
27
28#define QLCNIC_FLAGS_VLAN_TAGGED 0x10
29#define QLCNIC_FLAGS_VLAN_OOB 0x40
30
31#define qlcnic_set_tx_vlan_tci(cmd_desc, v) \
32 (cmd_desc)->vlan_TCI = cpu_to_le16(v);
33#define qlcnic_set_cmd_desc_port(cmd_desc, var) \
34 ((cmd_desc)->port_ctxid |= ((var) & 0x0F))
35#define qlcnic_set_cmd_desc_ctxid(cmd_desc, var) \
36 ((cmd_desc)->port_ctxid |= ((var) << 4 & 0xF0))
37
38#define qlcnic_set_tx_port(_desc, _port) \
39 ((_desc)->port_ctxid = ((_port) & 0xf) | (((_port) << 4) & 0xf0))
40
41#define qlcnic_set_tx_flags_opcode(_desc, _flags, _opcode) \
42 ((_desc)->flags_opcode |= \
43 cpu_to_le16(((_flags) & 0x7f) | (((_opcode) & 0x3f) << 7)))
44
45#define qlcnic_set_tx_frags_len(_desc, _frags, _len) \
46 ((_desc)->nfrags__length = \
47 cpu_to_le32(((_frags) & 0xff) | (((_len) & 0xffffff) << 8)))
48
49/* owner bits of status_desc */
50#define STATUS_OWNER_HOST (0x1ULL << 56)
51#define STATUS_OWNER_PHANTOM (0x2ULL << 56)
52
53/* Status descriptor:
54 0-3 port, 4-7 status, 8-11 type, 12-27 total_length
55 28-43 reference_handle, 44-47 protocol, 48-52 pkt_offset
56 53-55 desc_cnt, 56-57 owner, 58-63 opcode
57 */
58#define qlcnic_get_sts_port(sts_data) \
59 ((sts_data) & 0x0F)
60#define qlcnic_get_sts_status(sts_data) \
61 (((sts_data) >> 4) & 0x0F)
62#define qlcnic_get_sts_type(sts_data) \
63 (((sts_data) >> 8) & 0x0F)
64#define qlcnic_get_sts_totallength(sts_data) \
65 (((sts_data) >> 12) & 0xFFFF)
66#define qlcnic_get_sts_refhandle(sts_data) \
67 (((sts_data) >> 28) & 0xFFFF)
68#define qlcnic_get_sts_prot(sts_data) \
69 (((sts_data) >> 44) & 0x0F)
70#define qlcnic_get_sts_pkt_offset(sts_data) \
71 (((sts_data) >> 48) & 0x1F)
72#define qlcnic_get_sts_desc_cnt(sts_data) \
73 (((sts_data) >> 53) & 0x7)
74#define qlcnic_get_sts_opcode(sts_data) \
75 (((sts_data) >> 58) & 0x03F)
76
77#define qlcnic_get_lro_sts_refhandle(sts_data) \
78 ((sts_data) & 0x07FFF)
79#define qlcnic_get_lro_sts_length(sts_data) \
80 (((sts_data) >> 16) & 0x0FFFF)
81#define qlcnic_get_lro_sts_l2_hdr_offset(sts_data) \
82 (((sts_data) >> 32) & 0x0FF)
83#define qlcnic_get_lro_sts_l4_hdr_offset(sts_data) \
84 (((sts_data) >> 40) & 0x0FF)
85#define qlcnic_get_lro_sts_timestamp(sts_data) \
86 (((sts_data) >> 48) & 0x1)
87#define qlcnic_get_lro_sts_type(sts_data) \
88 (((sts_data) >> 49) & 0x7)
89#define qlcnic_get_lro_sts_push_flag(sts_data) \
90 (((sts_data) >> 52) & 0x1)
91#define qlcnic_get_lro_sts_seq_number(sts_data) \
92 ((sts_data) & 0x0FFFFFFFF)
93#define qlcnic_get_lro_sts_mss(sts_data1) \
94 ((sts_data1 >> 32) & 0x0FFFF)
95
96#define qlcnic_83xx_get_lro_sts_mss(sts) ((sts) & 0xffff)
97
98/* opcode field in status_desc */
99#define QLCNIC_SYN_OFFLOAD 0x03
100#define QLCNIC_RXPKT_DESC 0x04
101#define QLCNIC_OLD_RXPKT_DESC 0x3f
102#define QLCNIC_RESPONSE_DESC 0x05
103#define QLCNIC_LRO_DESC 0x12
104
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/* for status field in status_desc */
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, struct qlcnic_host_tx_ring *tx_ring)
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 u32 producer;
278 u64 word;
279
280 producer = tx_ring->producer;
281 hwdesc = &tx_ring->desc_head[tx_ring->producer];
282
283 req = (struct qlcnic_nic_req *)hwdesc;
284 memset(req, 0, sizeof(struct qlcnic_nic_req));
285 req->qhdr = cpu_to_le64(QLCNIC_REQUEST << 23);
286
287 word = QLCNIC_MAC_EVENT | ((u64)(adapter->portnum) << 16);
288 req->req_hdr = cpu_to_le64(word);
289
290 mac_req = (struct qlcnic_mac_req *)&(req->words[0]);
291 mac_req->op = vlan_id ? QLCNIC_MAC_VLAN_ADD : QLCNIC_MAC_ADD;
292 memcpy(mac_req->mac_addr, uaddr, ETH_ALEN);
293
294 vlan_req = (struct qlcnic_vlan_req *)&req->words[1];
295 vlan_req->vlan_id = cpu_to_le16(vlan_id);
296
297 tx_ring->producer = get_next_index(producer, tx_ring->num_desc);
298 smp_mb();
299}
300
301static void qlcnic_send_filter(struct qlcnic_adapter *adapter,
302 struct cmd_desc_type0 *first_desc,
303 struct sk_buff *skb,
304 struct qlcnic_host_tx_ring *tx_ring)
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 = skb_vlan_eth_hdr(skb);
322 vlan_id = ntohs(vh->h_vlan_TCI);
323 } else if (skb_vlan_tag_present(skb)) {
324 vlan_id = skb_vlan_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 (time_is_before_jiffies(QLCNIC_READD_AGE * HZ + tmp_fil->ftime))
337 qlcnic_change_filter(adapter, &src_addr,
338 vlan_id, tx_ring);
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, tx_ring);
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 /* VXLAN header size = 8 */
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 /* Copy inner and outer headers in Tx descriptor(s)
400 * If total_hdr_len > cmd_desc_type0, use multiple
401 * descriptors
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 /* Make sure updated tx_ring->producer is visible
419 * for qlcnic_tx_avail()
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 /* Prepare first 16 bits of byte offset 16 of Tx descriptor */
439 if (ip_hdr(skb)->version == 6)
440 encap_descr |= QLCNIC_ENCAP_OUTER_L3_IP6;
441
442 /* outer IP header's size in 32bit words size*/
443 encap_descr |= (skb_network_header_len(skb) >> 2) << 6;
444
445 /* outer IP header offset */
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, tag_vlan = 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 = skb_vlan_eth_hdr(skb);
472 flags = QLCNIC_FLAGS_VLAN_TAGGED;
473 vlan_tci = ntohs(vh->h_vlan_TCI);
474 protocol = ntohs(vh->h_vlan_encapsulated_proto);
475 tag_vlan = 1;
476 } else if (skb_vlan_tag_present(skb)) {
477 flags = QLCNIC_FLAGS_VLAN_OOB;
478 vlan_tci = skb_vlan_tag_get(skb);
479 tag_vlan = 1;
480 }
481 if (unlikely(adapter->tx_pvid)) {
482 if (tag_vlan && !(adapter->flags & QLCNIC_TAGGING_ENABLED))
483 return -EIO;
484 if (tag_vlan && (adapter->flags & QLCNIC_TAGGING_ENABLED))
485 goto set_flags;
486
487 flags = QLCNIC_FLAGS_VLAN_OOB;
488 vlan_tci = adapter->tx_pvid;
489 }
490set_flags:
491 qlcnic_set_tx_vlan_tci(first_desc, vlan_tci);
492 qlcnic_set_tx_flags_opcode(first_desc, flags, opcode);
493
494 if (*(skb->data) & BIT_0) {
495 flags |= BIT_0;
496 memcpy(&first_desc->eth_addr, skb->data, ETH_ALEN);
497 }
498 opcode = QLCNIC_TX_ETHER_PKT;
499 if (skb_is_gso(skb)) {
500 hdr_len = skb_tcp_all_headers(skb);
501 first_desc->mss = cpu_to_le16(skb_shinfo(skb)->gso_size);
502 first_desc->hdr_length = hdr_len;
503 opcode = (protocol == ETH_P_IPV6) ? QLCNIC_TX_TCP_LSO6 :
504 QLCNIC_TX_TCP_LSO;
505
506 /* For LSO, we need to copy the MAC/IP/TCP headers into
507 * the descriptor ring */
508 copied = 0;
509 offset = 2;
510
511 if (flags & QLCNIC_FLAGS_VLAN_OOB) {
512 first_desc->hdr_length += VLAN_HLEN;
513 first_desc->tcp_hdr_offset = VLAN_HLEN;
514 first_desc->ip_hdr_offset = VLAN_HLEN;
515
516 /* Only in case of TSO on vlan device */
517 flags |= QLCNIC_FLAGS_VLAN_TAGGED;
518
519 /* Create a TSO vlan header template for firmware */
520 hwdesc = &tx_ring->desc_head[producer];
521 tx_ring->cmd_buf_arr[producer].skb = NULL;
522
523 copy_len = min((int)sizeof(struct cmd_desc_type0) -
524 offset, hdr_len + VLAN_HLEN);
525
526 vh = (struct vlan_ethhdr *)((char *) hwdesc + 2);
527 skb_copy_from_linear_data(skb, vh, 12);
528 vh->h_vlan_proto = htons(ETH_P_8021Q);
529 vh->h_vlan_TCI = htons(vlan_tci);
530
531 skb_copy_from_linear_data_offset(skb, 12,
532 (char *)vh + 16,
533 copy_len - 16);
534 copied = copy_len - VLAN_HLEN;
535 offset = 0;
536 producer = get_next_index(producer, tx_ring->num_desc);
537 }
538
539 while (copied < hdr_len) {
540 size = (int)sizeof(struct cmd_desc_type0) - offset;
541 copy_len = min(size, (hdr_len - copied));
542 hwdesc = &tx_ring->desc_head[producer];
543 tx_ring->cmd_buf_arr[producer].skb = NULL;
544 skb_copy_from_linear_data_offset(skb, copied,
545 (char *)hwdesc +
546 offset, copy_len);
547 copied += copy_len;
548 offset = 0;
549 producer = get_next_index(producer, tx_ring->num_desc);
550 }
551
552 tx_ring->producer = producer;
553 smp_mb();
554 adapter->stats.lso_frames++;
555
556 } else if (skb->ip_summed == CHECKSUM_PARTIAL) {
557 if (protocol == ETH_P_IP) {
558 l4proto = ip_hdr(skb)->protocol;
559
560 if (l4proto == IPPROTO_TCP)
561 opcode = QLCNIC_TX_TCP_PKT;
562 else if (l4proto == IPPROTO_UDP)
563 opcode = QLCNIC_TX_UDP_PKT;
564 } else if (protocol == ETH_P_IPV6) {
565 l4proto = ipv6_hdr(skb)->nexthdr;
566
567 if (l4proto == IPPROTO_TCP)
568 opcode = QLCNIC_TX_TCPV6_PKT;
569 else if (l4proto == IPPROTO_UDP)
570 opcode = QLCNIC_TX_UDPV6_PKT;
571 }
572 }
573 first_desc->tcp_hdr_offset += skb_transport_offset(skb);
574 first_desc->ip_hdr_offset += skb_network_offset(skb);
575 qlcnic_set_tx_flags_opcode(first_desc, flags, opcode);
576
577 return 0;
578}
579
580static int qlcnic_map_tx_skb(struct pci_dev *pdev, struct sk_buff *skb,
581 struct qlcnic_cmd_buffer *pbuf)
582{
583 struct qlcnic_skb_frag *nf;
584 skb_frag_t *frag;
585 int i, nr_frags;
586 dma_addr_t map;
587
588 nr_frags = skb_shinfo(skb)->nr_frags;
589 nf = &pbuf->frag_array[0];
590
591 map = dma_map_single(&pdev->dev, skb->data, skb_headlen(skb),
592 DMA_TO_DEVICE);
593 if (dma_mapping_error(&pdev->dev, map))
594 goto out_err;
595
596 nf->dma = map;
597 nf->length = skb_headlen(skb);
598
599 for (i = 0; i < nr_frags; i++) {
600 frag = &skb_shinfo(skb)->frags[i];
601 nf = &pbuf->frag_array[i+1];
602 map = skb_frag_dma_map(&pdev->dev, frag, 0, skb_frag_size(frag),
603 DMA_TO_DEVICE);
604 if (dma_mapping_error(&pdev->dev, map))
605 goto unwind;
606
607 nf->dma = map;
608 nf->length = skb_frag_size(frag);
609 }
610
611 return 0;
612
613unwind:
614 while (--i >= 0) {
615 nf = &pbuf->frag_array[i+1];
616 dma_unmap_page(&pdev->dev, nf->dma, nf->length, DMA_TO_DEVICE);
617 }
618
619 nf = &pbuf->frag_array[0];
620 dma_unmap_single(&pdev->dev, nf->dma, skb_headlen(skb), DMA_TO_DEVICE);
621
622out_err:
623 return -ENOMEM;
624}
625
626static void qlcnic_unmap_buffers(struct pci_dev *pdev, struct sk_buff *skb,
627 struct qlcnic_cmd_buffer *pbuf)
628{
629 struct qlcnic_skb_frag *nf = &pbuf->frag_array[0];
630 int i, nr_frags = skb_shinfo(skb)->nr_frags;
631
632 for (i = 0; i < nr_frags; i++) {
633 nf = &pbuf->frag_array[i+1];
634 dma_unmap_page(&pdev->dev, nf->dma, nf->length, DMA_TO_DEVICE);
635 }
636
637 nf = &pbuf->frag_array[0];
638 dma_unmap_single(&pdev->dev, nf->dma, skb_headlen(skb), DMA_TO_DEVICE);
639 pbuf->skb = NULL;
640}
641
642static inline void qlcnic_clear_cmddesc(u64 *desc)
643{
644 desc[0] = 0ULL;
645 desc[2] = 0ULL;
646 desc[7] = 0ULL;
647}
648
649netdev_tx_t qlcnic_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
650{
651 struct qlcnic_adapter *adapter = netdev_priv(netdev);
652 struct qlcnic_host_tx_ring *tx_ring;
653 struct qlcnic_cmd_buffer *pbuf;
654 struct qlcnic_skb_frag *buffrag;
655 struct cmd_desc_type0 *hwdesc, *first_desc;
656 struct pci_dev *pdev;
657 struct ethhdr *phdr;
658 int i, k, frag_count, delta = 0;
659 u32 producer, num_txd;
660 u16 protocol;
661 bool l4_is_udp = false;
662
663 if (!test_bit(__QLCNIC_DEV_UP, &adapter->state)) {
664 netif_tx_stop_all_queues(netdev);
665 return NETDEV_TX_BUSY;
666 }
667
668 if (adapter->flags & QLCNIC_MACSPOOF) {
669 phdr = (struct ethhdr *)skb->data;
670 if (!ether_addr_equal(phdr->h_source, adapter->mac_addr))
671 goto drop_packet;
672 }
673
674 tx_ring = &adapter->tx_ring[skb_get_queue_mapping(skb)];
675 num_txd = tx_ring->num_desc;
676
677 frag_count = skb_shinfo(skb)->nr_frags + 1;
678
679 /* 14 frags supported for normal packet and
680 * 32 frags supported for TSO packet
681 */
682 if (!skb_is_gso(skb) && frag_count > QLCNIC_MAX_FRAGS_PER_TX) {
683 for (i = 0; i < (frag_count - QLCNIC_MAX_FRAGS_PER_TX); i++)
684 delta += skb_frag_size(&skb_shinfo(skb)->frags[i]);
685
686 if (!__pskb_pull_tail(skb, delta))
687 goto drop_packet;
688
689 frag_count = 1 + skb_shinfo(skb)->nr_frags;
690 }
691
692 if (unlikely(qlcnic_tx_avail(tx_ring) <= TX_STOP_THRESH)) {
693 netif_tx_stop_queue(tx_ring->txq);
694 if (qlcnic_tx_avail(tx_ring) > TX_STOP_THRESH) {
695 netif_tx_start_queue(tx_ring->txq);
696 } else {
697 tx_ring->tx_stats.xmit_off++;
698 return NETDEV_TX_BUSY;
699 }
700 }
701
702 producer = tx_ring->producer;
703 pbuf = &tx_ring->cmd_buf_arr[producer];
704 pdev = adapter->pdev;
705 first_desc = &tx_ring->desc_head[producer];
706 hwdesc = &tx_ring->desc_head[producer];
707 qlcnic_clear_cmddesc((u64 *)hwdesc);
708
709 if (qlcnic_map_tx_skb(pdev, skb, pbuf)) {
710 adapter->stats.tx_dma_map_error++;
711 goto drop_packet;
712 }
713
714 pbuf->skb = skb;
715 pbuf->frag_count = frag_count;
716
717 qlcnic_set_tx_frags_len(first_desc, frag_count, skb->len);
718 qlcnic_set_tx_port(first_desc, adapter->portnum);
719
720 for (i = 0; i < frag_count; i++) {
721 k = i % 4;
722
723 if ((k == 0) && (i > 0)) {
724 /* move to next desc.*/
725 producer = get_next_index(producer, num_txd);
726 hwdesc = &tx_ring->desc_head[producer];
727 qlcnic_clear_cmddesc((u64 *)hwdesc);
728 tx_ring->cmd_buf_arr[producer].skb = NULL;
729 }
730
731 buffrag = &pbuf->frag_array[i];
732 hwdesc->buffer_length[k] = cpu_to_le16(buffrag->length);
733 switch (k) {
734 case 0:
735 hwdesc->addr_buffer1 = cpu_to_le64(buffrag->dma);
736 break;
737 case 1:
738 hwdesc->addr_buffer2 = cpu_to_le64(buffrag->dma);
739 break;
740 case 2:
741 hwdesc->addr_buffer3 = cpu_to_le64(buffrag->dma);
742 break;
743 case 3:
744 hwdesc->addr_buffer4 = cpu_to_le64(buffrag->dma);
745 break;
746 }
747 }
748
749 tx_ring->producer = get_next_index(producer, num_txd);
750 smp_mb();
751
752 protocol = ntohs(skb->protocol);
753 if (protocol == ETH_P_IP)
754 l4_is_udp = ip_hdr(skb)->protocol == IPPROTO_UDP;
755 else if (protocol == ETH_P_IPV6)
756 l4_is_udp = ipv6_hdr(skb)->nexthdr == IPPROTO_UDP;
757
758 /* Check if it is a VXLAN packet */
759 if (!skb->encapsulation || !l4_is_udp ||
760 !qlcnic_encap_tx_offload(adapter)) {
761 if (unlikely(qlcnic_tx_pkt(adapter, first_desc, skb,
762 tx_ring)))
763 goto unwind_buff;
764 } else {
765 if (unlikely(qlcnic_tx_encap_pkt(adapter, first_desc,
766 skb, tx_ring)))
767 goto unwind_buff;
768 }
769
770 if (adapter->drv_mac_learn)
771 qlcnic_send_filter(adapter, first_desc, skb, tx_ring);
772
773 tx_ring->tx_stats.tx_bytes += skb->len;
774 tx_ring->tx_stats.xmit_called++;
775
776 /* Ensure writes are complete before HW fetches Tx descriptors */
777 wmb();
778 qlcnic_update_cmd_producer(tx_ring);
779
780 return NETDEV_TX_OK;
781
782unwind_buff:
783 qlcnic_unmap_buffers(pdev, skb, pbuf);
784drop_packet:
785 adapter->stats.txdropped++;
786 dev_kfree_skb_any(skb);
787 return NETDEV_TX_OK;
788}
789
790void qlcnic_advert_link_change(struct qlcnic_adapter *adapter, int linkup)
791{
792 struct net_device *netdev = adapter->netdev;
793
794 if (adapter->ahw->linkup && !linkup) {
795 netdev_info(netdev, "NIC Link is down\n");
796 adapter->ahw->linkup = 0;
797 netif_carrier_off(netdev);
798 } else if (!adapter->ahw->linkup && linkup) {
799 adapter->ahw->linkup = 1;
800
801 /* Do not advertise Link up to the stack if device
802 * is in loopback mode
803 */
804 if (qlcnic_83xx_check(adapter) && adapter->ahw->lb_mode) {
805 netdev_info(netdev, "NIC Link is up for loopback test\n");
806 return;
807 }
808
809 netdev_info(netdev, "NIC Link is up\n");
810 netif_carrier_on(netdev);
811 }
812}
813
814static int qlcnic_alloc_rx_skb(struct qlcnic_adapter *adapter,
815 struct qlcnic_host_rds_ring *rds_ring,
816 struct qlcnic_rx_buffer *buffer)
817{
818 struct sk_buff *skb;
819 dma_addr_t dma;
820 struct pci_dev *pdev = adapter->pdev;
821
822 skb = netdev_alloc_skb(adapter->netdev, rds_ring->skb_size);
823 if (!skb) {
824 adapter->stats.skb_alloc_failure++;
825 return -ENOMEM;
826 }
827
828 skb_reserve(skb, NET_IP_ALIGN);
829 dma = dma_map_single(&pdev->dev, skb->data, rds_ring->dma_size,
830 DMA_FROM_DEVICE);
831
832 if (dma_mapping_error(&pdev->dev, dma)) {
833 adapter->stats.rx_dma_map_error++;
834 dev_kfree_skb_any(skb);
835 return -ENOMEM;
836 }
837
838 buffer->skb = skb;
839 buffer->dma = dma;
840
841 return 0;
842}
843
844static void qlcnic_post_rx_buffers_nodb(struct qlcnic_adapter *adapter,
845 struct qlcnic_host_rds_ring *rds_ring,
846 u8 ring_id)
847{
848 struct rcv_desc *pdesc;
849 struct qlcnic_rx_buffer *buffer;
850 int count = 0;
851 uint32_t producer, handle;
852 struct list_head *head;
853
854 if (!spin_trylock(&rds_ring->lock))
855 return;
856
857 producer = rds_ring->producer;
858 head = &rds_ring->free_list;
859 while (!list_empty(head)) {
860 buffer = list_entry(head->next, struct qlcnic_rx_buffer, list);
861
862 if (!buffer->skb) {
863 if (qlcnic_alloc_rx_skb(adapter, rds_ring, buffer))
864 break;
865 }
866 count++;
867 list_del(&buffer->list);
868
869 /* make a rcv descriptor */
870 pdesc = &rds_ring->desc_head[producer];
871 handle = qlcnic_get_ref_handle(adapter,
872 buffer->ref_handle, ring_id);
873 pdesc->reference_handle = cpu_to_le16(handle);
874 pdesc->buffer_length = cpu_to_le32(rds_ring->dma_size);
875 pdesc->addr_buffer = cpu_to_le64(buffer->dma);
876 producer = get_next_index(producer, rds_ring->num_desc);
877 }
878 if (count) {
879 rds_ring->producer = producer;
880 writel((producer - 1) & (rds_ring->num_desc - 1),
881 rds_ring->crb_rcv_producer);
882 }
883 spin_unlock(&rds_ring->lock);
884}
885
886static int qlcnic_process_cmd_ring(struct qlcnic_adapter *adapter,
887 struct qlcnic_host_tx_ring *tx_ring,
888 int budget)
889{
890 u32 sw_consumer, hw_consumer;
891 int i, done, count = 0;
892 struct qlcnic_cmd_buffer *buffer;
893 struct pci_dev *pdev = adapter->pdev;
894 struct net_device *netdev = adapter->netdev;
895 struct qlcnic_skb_frag *frag;
896
897 if (!spin_trylock(&tx_ring->tx_clean_lock))
898 return 1;
899
900 sw_consumer = tx_ring->sw_consumer;
901 hw_consumer = le32_to_cpu(*(tx_ring->hw_consumer));
902
903 while (sw_consumer != hw_consumer) {
904 buffer = &tx_ring->cmd_buf_arr[sw_consumer];
905 if (buffer->skb) {
906 frag = &buffer->frag_array[0];
907 dma_unmap_single(&pdev->dev, frag->dma, frag->length,
908 DMA_TO_DEVICE);
909 frag->dma = 0ULL;
910 for (i = 1; i < buffer->frag_count; i++) {
911 frag++;
912 dma_unmap_page(&pdev->dev, frag->dma,
913 frag->length, DMA_TO_DEVICE);
914 frag->dma = 0ULL;
915 }
916 tx_ring->tx_stats.xmit_finished++;
917 dev_kfree_skb_any(buffer->skb);
918 buffer->skb = NULL;
919 }
920
921 sw_consumer = get_next_index(sw_consumer, tx_ring->num_desc);
922 if (++count >= budget)
923 break;
924 }
925
926 tx_ring->sw_consumer = sw_consumer;
927
928 if (count && netif_running(netdev)) {
929 smp_mb();
930 if (netif_tx_queue_stopped(tx_ring->txq) &&
931 netif_carrier_ok(netdev)) {
932 if (qlcnic_tx_avail(tx_ring) > TX_STOP_THRESH) {
933 netif_tx_wake_queue(tx_ring->txq);
934 tx_ring->tx_stats.xmit_on++;
935 }
936 }
937 adapter->tx_timeo_cnt = 0;
938 }
939 /*
940 * If everything is freed up to consumer then check if the ring is full
941 * If the ring is full then check if more needs to be freed and
942 * schedule the call back again.
943 *
944 * This happens when there are 2 CPUs. One could be freeing and the
945 * other filling it. If the ring is full when we get out of here and
946 * the card has already interrupted the host then the host can miss the
947 * interrupt.
948 *
949 * There is still a possible race condition and the host could miss an
950 * interrupt. The card has to take care of this.
951 */
952 hw_consumer = le32_to_cpu(*(tx_ring->hw_consumer));
953 done = (sw_consumer == hw_consumer);
954
955 spin_unlock(&tx_ring->tx_clean_lock);
956
957 return done;
958}
959
960static int qlcnic_poll(struct napi_struct *napi, int budget)
961{
962 int tx_complete, work_done;
963 struct qlcnic_host_sds_ring *sds_ring;
964 struct qlcnic_adapter *adapter;
965 struct qlcnic_host_tx_ring *tx_ring;
966
967 sds_ring = container_of(napi, struct qlcnic_host_sds_ring, napi);
968 adapter = sds_ring->adapter;
969 tx_ring = sds_ring->tx_ring;
970
971 tx_complete = qlcnic_process_cmd_ring(adapter, tx_ring,
972 budget);
973 work_done = qlcnic_process_rcv_ring(sds_ring, budget);
974
975 /* Check if we need a repoll */
976 if (!tx_complete)
977 work_done = budget;
978
979 if (work_done < budget) {
980 napi_complete_done(&sds_ring->napi, work_done);
981 if (test_bit(__QLCNIC_DEV_UP, &adapter->state)) {
982 qlcnic_enable_sds_intr(adapter, sds_ring);
983 qlcnic_enable_tx_intr(adapter, tx_ring);
984 }
985 }
986
987 return work_done;
988}
989
990static int qlcnic_tx_poll(struct napi_struct *napi, int budget)
991{
992 struct qlcnic_host_tx_ring *tx_ring;
993 struct qlcnic_adapter *adapter;
994 int work_done;
995
996 tx_ring = container_of(napi, struct qlcnic_host_tx_ring, napi);
997 adapter = tx_ring->adapter;
998
999 work_done = qlcnic_process_cmd_ring(adapter, tx_ring, budget);
1000 if (work_done) {
1001 napi_complete(&tx_ring->napi);
1002 if (test_bit(__QLCNIC_DEV_UP, &adapter->state))
1003 qlcnic_enable_tx_intr(adapter, tx_ring);
1004 } else {
1005 /* As qlcnic_process_cmd_ring() returned 0, we need a repoll*/
1006 work_done = budget;
1007 }
1008
1009 return work_done;
1010}
1011
1012static int qlcnic_rx_poll(struct napi_struct *napi, int budget)
1013{
1014 struct qlcnic_host_sds_ring *sds_ring;
1015 struct qlcnic_adapter *adapter;
1016 int work_done;
1017
1018 sds_ring = container_of(napi, struct qlcnic_host_sds_ring, napi);
1019 adapter = sds_ring->adapter;
1020
1021 work_done = qlcnic_process_rcv_ring(sds_ring, budget);
1022
1023 if (work_done < budget) {
1024 napi_complete_done(&sds_ring->napi, work_done);
1025 if (test_bit(__QLCNIC_DEV_UP, &adapter->state))
1026 qlcnic_enable_sds_intr(adapter, sds_ring);
1027 }
1028
1029 return work_done;
1030}
1031
1032static void qlcnic_handle_linkevent(struct qlcnic_adapter *adapter,
1033 struct qlcnic_fw_msg *msg)
1034{
1035 u32 cable_OUI;
1036 u16 cable_len, link_speed;
1037 u8 link_status, module, duplex, autoneg, lb_status = 0;
1038 struct net_device *netdev = adapter->netdev;
1039
1040 adapter->ahw->has_link_events = 1;
1041
1042 cable_OUI = msg->body[1] & 0xffffffff;
1043 cable_len = (msg->body[1] >> 32) & 0xffff;
1044 link_speed = (msg->body[1] >> 48) & 0xffff;
1045
1046 link_status = msg->body[2] & 0xff;
1047 duplex = (msg->body[2] >> 16) & 0xff;
1048 autoneg = (msg->body[2] >> 24) & 0xff;
1049 lb_status = (msg->body[2] >> 32) & 0x3;
1050
1051 module = (msg->body[2] >> 8) & 0xff;
1052 if (module == LINKEVENT_MODULE_TWINAX_UNSUPPORTED_CABLE)
1053 dev_info(&netdev->dev,
1054 "unsupported cable: OUI 0x%x, length %d\n",
1055 cable_OUI, cable_len);
1056 else if (module == LINKEVENT_MODULE_TWINAX_UNSUPPORTED_CABLELEN)
1057 dev_info(&netdev->dev, "unsupported cable length %d\n",
1058 cable_len);
1059
1060 if (!link_status && (lb_status == QLCNIC_ILB_MODE ||
1061 lb_status == QLCNIC_ELB_MODE))
1062 adapter->ahw->loopback_state |= QLCNIC_LINKEVENT;
1063
1064 qlcnic_advert_link_change(adapter, link_status);
1065
1066 if (duplex == LINKEVENT_FULL_DUPLEX)
1067 adapter->ahw->link_duplex = DUPLEX_FULL;
1068 else
1069 adapter->ahw->link_duplex = DUPLEX_HALF;
1070
1071 adapter->ahw->module_type = module;
1072 adapter->ahw->link_autoneg = autoneg;
1073
1074 if (link_status) {
1075 adapter->ahw->link_speed = link_speed;
1076 } else {
1077 adapter->ahw->link_speed = SPEED_UNKNOWN;
1078 adapter->ahw->link_duplex = DUPLEX_UNKNOWN;
1079 }
1080}
1081
1082static void qlcnic_handle_fw_message(int desc_cnt, int index,
1083 struct qlcnic_host_sds_ring *sds_ring)
1084{
1085 struct qlcnic_fw_msg msg;
1086 struct status_desc *desc;
1087 struct qlcnic_adapter *adapter;
1088 struct device *dev;
1089 int i = 0, opcode, ret;
1090
1091 while (desc_cnt > 0 && i < 8) {
1092 desc = &sds_ring->desc_head[index];
1093 msg.words[i++] = le64_to_cpu(desc->status_desc_data[0]);
1094 msg.words[i++] = le64_to_cpu(desc->status_desc_data[1]);
1095
1096 index = get_next_index(index, sds_ring->num_desc);
1097 desc_cnt--;
1098 }
1099
1100 adapter = sds_ring->adapter;
1101 dev = &adapter->pdev->dev;
1102 opcode = qlcnic_get_nic_msg_opcode(msg.body[0]);
1103
1104 switch (opcode) {
1105 case QLCNIC_C2H_OPCODE_GET_LINKEVENT_RESPONSE:
1106 qlcnic_handle_linkevent(adapter, &msg);
1107 break;
1108 case QLCNIC_C2H_OPCODE_CONFIG_LOOPBACK:
1109 ret = (u32)(msg.body[1]);
1110 switch (ret) {
1111 case 0:
1112 adapter->ahw->loopback_state |= QLCNIC_LB_RESPONSE;
1113 break;
1114 case 1:
1115 dev_info(dev, "loopback already in progress\n");
1116 adapter->ahw->diag_cnt = -EINPROGRESS;
1117 break;
1118 case 2:
1119 dev_info(dev, "loopback cable is not connected\n");
1120 adapter->ahw->diag_cnt = -ENODEV;
1121 break;
1122 default:
1123 dev_info(dev,
1124 "loopback configure request failed, err %x\n",
1125 ret);
1126 adapter->ahw->diag_cnt = -EIO;
1127 break;
1128 }
1129 break;
1130 case QLCNIC_C2H_OPCODE_GET_DCB_AEN:
1131 qlcnic_dcb_aen_handler(adapter->dcb, (void *)&msg);
1132 break;
1133 default:
1134 break;
1135 }
1136}
1137
1138static struct sk_buff *qlcnic_process_rxbuf(struct qlcnic_adapter *adapter,
1139 struct qlcnic_host_rds_ring *ring,
1140 u16 index, u16 cksum)
1141{
1142 struct qlcnic_rx_buffer *buffer;
1143 struct sk_buff *skb;
1144
1145 buffer = &ring->rx_buf_arr[index];
1146 if (unlikely(buffer->skb == NULL)) {
1147 WARN_ON(1);
1148 return NULL;
1149 }
1150
1151 dma_unmap_single(&adapter->pdev->dev, buffer->dma, ring->dma_size,
1152 DMA_FROM_DEVICE);
1153
1154 skb = buffer->skb;
1155 if (likely((adapter->netdev->features & NETIF_F_RXCSUM) &&
1156 (cksum == STATUS_CKSUM_OK || cksum == STATUS_CKSUM_LOOP))) {
1157 adapter->stats.csummed++;
1158 skb->ip_summed = CHECKSUM_UNNECESSARY;
1159 } else {
1160 skb_checksum_none_assert(skb);
1161 }
1162
1163
1164 buffer->skb = NULL;
1165
1166 return skb;
1167}
1168
1169static inline int qlcnic_check_rx_tagging(struct qlcnic_adapter *adapter,
1170 struct sk_buff *skb, u16 *vlan_tag)
1171{
1172 struct ethhdr *eth_hdr;
1173
1174 if (!__vlan_get_tag(skb, vlan_tag)) {
1175 eth_hdr = (struct ethhdr *)skb->data;
1176 memmove(skb->data + VLAN_HLEN, eth_hdr, ETH_ALEN * 2);
1177 skb_pull(skb, VLAN_HLEN);
1178 }
1179 if (!adapter->rx_pvid)
1180 return 0;
1181
1182 if (*vlan_tag == adapter->rx_pvid) {
1183 /* Outer vlan tag. Packet should follow non-vlan path */
1184 *vlan_tag = 0xffff;
1185 return 0;
1186 }
1187 if (adapter->flags & QLCNIC_TAGGING_ENABLED)
1188 return 0;
1189
1190 return -EINVAL;
1191}
1192
1193static struct qlcnic_rx_buffer *
1194qlcnic_process_rcv(struct qlcnic_adapter *adapter,
1195 struct qlcnic_host_sds_ring *sds_ring, int ring,
1196 u64 sts_data0)
1197{
1198 struct net_device *netdev = adapter->netdev;
1199 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1200 struct qlcnic_rx_buffer *buffer;
1201 struct sk_buff *skb;
1202 struct qlcnic_host_rds_ring *rds_ring;
1203 int index, length, cksum, pkt_offset, is_lb_pkt;
1204 u16 vid = 0xffff, t_vid;
1205
1206 if (unlikely(ring >= adapter->max_rds_rings))
1207 return NULL;
1208
1209 rds_ring = &recv_ctx->rds_rings[ring];
1210
1211 index = qlcnic_get_sts_refhandle(sts_data0);
1212 if (unlikely(index >= rds_ring->num_desc))
1213 return NULL;
1214
1215 buffer = &rds_ring->rx_buf_arr[index];
1216 length = qlcnic_get_sts_totallength(sts_data0);
1217 cksum = qlcnic_get_sts_status(sts_data0);
1218 pkt_offset = qlcnic_get_sts_pkt_offset(sts_data0);
1219
1220 skb = qlcnic_process_rxbuf(adapter, rds_ring, index, cksum);
1221 if (!skb)
1222 return buffer;
1223
1224 if (adapter->rx_mac_learn) {
1225 t_vid = 0;
1226 is_lb_pkt = qlcnic_82xx_is_lb_pkt(sts_data0);
1227 qlcnic_add_lb_filter(adapter, skb, is_lb_pkt, t_vid);
1228 }
1229
1230 if (length > rds_ring->skb_size)
1231 skb_put(skb, rds_ring->skb_size);
1232 else
1233 skb_put(skb, length);
1234
1235 if (pkt_offset)
1236 skb_pull(skb, pkt_offset);
1237
1238 if (unlikely(qlcnic_check_rx_tagging(adapter, skb, &vid))) {
1239 adapter->stats.rxdropped++;
1240 dev_kfree_skb(skb);
1241 return buffer;
1242 }
1243
1244 skb->protocol = eth_type_trans(skb, netdev);
1245
1246 if (vid != 0xffff)
1247 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid);
1248
1249 napi_gro_receive(&sds_ring->napi, skb);
1250
1251 adapter->stats.rx_pkts++;
1252 adapter->stats.rxbytes += length;
1253
1254 return buffer;
1255}
1256
1257#define QLC_TCP_HDR_SIZE 20
1258#define QLC_TCP_TS_OPTION_SIZE 12
1259#define QLC_TCP_TS_HDR_SIZE (QLC_TCP_HDR_SIZE + QLC_TCP_TS_OPTION_SIZE)
1260
1261static struct qlcnic_rx_buffer *
1262qlcnic_process_lro(struct qlcnic_adapter *adapter,
1263 int ring, u64 sts_data0, u64 sts_data1)
1264{
1265 struct net_device *netdev = adapter->netdev;
1266 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1267 struct qlcnic_rx_buffer *buffer;
1268 struct sk_buff *skb;
1269 struct qlcnic_host_rds_ring *rds_ring;
1270 struct iphdr *iph;
1271 struct ipv6hdr *ipv6h;
1272 struct tcphdr *th;
1273 bool push, timestamp;
1274 int index, l2_hdr_offset, l4_hdr_offset, is_lb_pkt;
1275 u16 lro_length, length, data_offset, t_vid, vid = 0xffff;
1276 u32 seq_number;
1277
1278 if (unlikely(ring >= adapter->max_rds_rings))
1279 return NULL;
1280
1281 rds_ring = &recv_ctx->rds_rings[ring];
1282
1283 index = qlcnic_get_lro_sts_refhandle(sts_data0);
1284 if (unlikely(index >= rds_ring->num_desc))
1285 return NULL;
1286
1287 buffer = &rds_ring->rx_buf_arr[index];
1288
1289 timestamp = qlcnic_get_lro_sts_timestamp(sts_data0);
1290 lro_length = qlcnic_get_lro_sts_length(sts_data0);
1291 l2_hdr_offset = qlcnic_get_lro_sts_l2_hdr_offset(sts_data0);
1292 l4_hdr_offset = qlcnic_get_lro_sts_l4_hdr_offset(sts_data0);
1293 push = qlcnic_get_lro_sts_push_flag(sts_data0);
1294 seq_number = qlcnic_get_lro_sts_seq_number(sts_data1);
1295
1296 skb = qlcnic_process_rxbuf(adapter, rds_ring, index, STATUS_CKSUM_OK);
1297 if (!skb)
1298 return buffer;
1299
1300 if (adapter->rx_mac_learn) {
1301 t_vid = 0;
1302 is_lb_pkt = qlcnic_82xx_is_lb_pkt(sts_data0);
1303 qlcnic_add_lb_filter(adapter, skb, is_lb_pkt, t_vid);
1304 }
1305
1306 if (timestamp)
1307 data_offset = l4_hdr_offset + QLC_TCP_TS_HDR_SIZE;
1308 else
1309 data_offset = l4_hdr_offset + QLC_TCP_HDR_SIZE;
1310
1311 skb_put(skb, lro_length + data_offset);
1312 skb_pull(skb, l2_hdr_offset);
1313
1314 if (unlikely(qlcnic_check_rx_tagging(adapter, skb, &vid))) {
1315 adapter->stats.rxdropped++;
1316 dev_kfree_skb(skb);
1317 return buffer;
1318 }
1319
1320 skb->protocol = eth_type_trans(skb, netdev);
1321
1322 if (ntohs(skb->protocol) == ETH_P_IPV6) {
1323 ipv6h = (struct ipv6hdr *)skb->data;
1324 th = (struct tcphdr *)(skb->data + sizeof(struct ipv6hdr));
1325 length = (th->doff << 2) + lro_length;
1326 ipv6h->payload_len = htons(length);
1327 } else {
1328 iph = (struct iphdr *)skb->data;
1329 th = (struct tcphdr *)(skb->data + (iph->ihl << 2));
1330 length = (iph->ihl << 2) + (th->doff << 2) + lro_length;
1331 csum_replace2(&iph->check, iph->tot_len, htons(length));
1332 iph->tot_len = htons(length);
1333 }
1334
1335 th->psh = push;
1336 th->seq = htonl(seq_number);
1337 length = skb->len;
1338
1339 if (adapter->flags & QLCNIC_FW_LRO_MSS_CAP) {
1340 skb_shinfo(skb)->gso_size = qlcnic_get_lro_sts_mss(sts_data1);
1341 if (skb->protocol == htons(ETH_P_IPV6))
1342 skb_shinfo(skb)->gso_type = SKB_GSO_TCPV6;
1343 else
1344 skb_shinfo(skb)->gso_type = SKB_GSO_TCPV4;
1345 }
1346
1347 if (vid != 0xffff)
1348 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid);
1349 netif_receive_skb(skb);
1350
1351 adapter->stats.lro_pkts++;
1352 adapter->stats.lrobytes += length;
1353
1354 return buffer;
1355}
1356
1357static int qlcnic_process_rcv_ring(struct qlcnic_host_sds_ring *sds_ring, int max)
1358{
1359 struct qlcnic_host_rds_ring *rds_ring;
1360 struct qlcnic_adapter *adapter = sds_ring->adapter;
1361 struct list_head *cur;
1362 struct status_desc *desc;
1363 struct qlcnic_rx_buffer *rxbuf;
1364 int opcode, desc_cnt, count = 0;
1365 u64 sts_data0, sts_data1;
1366 u8 ring;
1367 u32 consumer = sds_ring->consumer;
1368
1369 while (count < max) {
1370 desc = &sds_ring->desc_head[consumer];
1371 sts_data0 = le64_to_cpu(desc->status_desc_data[0]);
1372
1373 if (!(sts_data0 & STATUS_OWNER_HOST))
1374 break;
1375
1376 desc_cnt = qlcnic_get_sts_desc_cnt(sts_data0);
1377 opcode = qlcnic_get_sts_opcode(sts_data0);
1378 switch (opcode) {
1379 case QLCNIC_RXPKT_DESC:
1380 case QLCNIC_OLD_RXPKT_DESC:
1381 case QLCNIC_SYN_OFFLOAD:
1382 ring = qlcnic_get_sts_type(sts_data0);
1383 rxbuf = qlcnic_process_rcv(adapter, sds_ring, ring,
1384 sts_data0);
1385 break;
1386 case QLCNIC_LRO_DESC:
1387 ring = qlcnic_get_lro_sts_type(sts_data0);
1388 sts_data1 = le64_to_cpu(desc->status_desc_data[1]);
1389 rxbuf = qlcnic_process_lro(adapter, ring, sts_data0,
1390 sts_data1);
1391 break;
1392 case QLCNIC_RESPONSE_DESC:
1393 qlcnic_handle_fw_message(desc_cnt, consumer, sds_ring);
1394 goto skip;
1395 default:
1396 goto skip;
1397 }
1398 WARN_ON(desc_cnt > 1);
1399
1400 if (likely(rxbuf))
1401 list_add_tail(&rxbuf->list, &sds_ring->free_list[ring]);
1402 else
1403 adapter->stats.null_rxbuf++;
1404skip:
1405 for (; desc_cnt > 0; desc_cnt--) {
1406 desc = &sds_ring->desc_head[consumer];
1407 desc->status_desc_data[0] = QLCNIC_DESC_OWNER_FW;
1408 consumer = get_next_index(consumer, sds_ring->num_desc);
1409 }
1410 count++;
1411 }
1412
1413 for (ring = 0; ring < adapter->max_rds_rings; ring++) {
1414 rds_ring = &adapter->recv_ctx->rds_rings[ring];
1415 if (!list_empty(&sds_ring->free_list[ring])) {
1416 list_for_each(cur, &sds_ring->free_list[ring]) {
1417 rxbuf = list_entry(cur, struct qlcnic_rx_buffer,
1418 list);
1419 qlcnic_alloc_rx_skb(adapter, rds_ring, rxbuf);
1420 }
1421 spin_lock(&rds_ring->lock);
1422 list_splice_tail_init(&sds_ring->free_list[ring],
1423 &rds_ring->free_list);
1424 spin_unlock(&rds_ring->lock);
1425 }
1426
1427 qlcnic_post_rx_buffers_nodb(adapter, rds_ring, ring);
1428 }
1429
1430 if (count) {
1431 sds_ring->consumer = consumer;
1432 writel(consumer, sds_ring->crb_sts_consumer);
1433 }
1434
1435 return count;
1436}
1437
1438void qlcnic_post_rx_buffers(struct qlcnic_adapter *adapter,
1439 struct qlcnic_host_rds_ring *rds_ring, u8 ring_id)
1440{
1441 struct rcv_desc *pdesc;
1442 struct qlcnic_rx_buffer *buffer;
1443 int count = 0;
1444 u32 producer, handle;
1445 struct list_head *head;
1446
1447 producer = rds_ring->producer;
1448 head = &rds_ring->free_list;
1449
1450 while (!list_empty(head)) {
1451
1452 buffer = list_entry(head->next, struct qlcnic_rx_buffer, list);
1453
1454 if (!buffer->skb) {
1455 if (qlcnic_alloc_rx_skb(adapter, rds_ring, buffer))
1456 break;
1457 }
1458
1459 count++;
1460 list_del(&buffer->list);
1461
1462 /* make a rcv descriptor */
1463 pdesc = &rds_ring->desc_head[producer];
1464 pdesc->addr_buffer = cpu_to_le64(buffer->dma);
1465 handle = qlcnic_get_ref_handle(adapter, buffer->ref_handle,
1466 ring_id);
1467 pdesc->reference_handle = cpu_to_le16(handle);
1468 pdesc->buffer_length = cpu_to_le32(rds_ring->dma_size);
1469 producer = get_next_index(producer, rds_ring->num_desc);
1470 }
1471
1472 if (count) {
1473 rds_ring->producer = producer;
1474 writel((producer-1) & (rds_ring->num_desc-1),
1475 rds_ring->crb_rcv_producer);
1476 }
1477}
1478
1479static void dump_skb(struct sk_buff *skb, struct qlcnic_adapter *adapter)
1480{
1481 if (adapter->ahw->msg_enable & NETIF_MSG_DRV) {
1482 char prefix[30];
1483
1484 scnprintf(prefix, sizeof(prefix), "%s: %s: ",
1485 dev_name(&adapter->pdev->dev), __func__);
1486
1487 print_hex_dump_debug(prefix, DUMP_PREFIX_NONE, 16, 1,
1488 skb->data, skb->len, true);
1489 }
1490}
1491
1492static void qlcnic_process_rcv_diag(struct qlcnic_adapter *adapter, int ring,
1493 u64 sts_data0)
1494{
1495 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1496 struct sk_buff *skb;
1497 struct qlcnic_host_rds_ring *rds_ring;
1498 int index, length, cksum, pkt_offset;
1499
1500 if (unlikely(ring >= adapter->max_rds_rings))
1501 return;
1502
1503 rds_ring = &recv_ctx->rds_rings[ring];
1504
1505 index = qlcnic_get_sts_refhandle(sts_data0);
1506 length = qlcnic_get_sts_totallength(sts_data0);
1507 if (unlikely(index >= rds_ring->num_desc))
1508 return;
1509
1510 cksum = qlcnic_get_sts_status(sts_data0);
1511 pkt_offset = qlcnic_get_sts_pkt_offset(sts_data0);
1512
1513 skb = qlcnic_process_rxbuf(adapter, rds_ring, index, cksum);
1514 if (!skb)
1515 return;
1516
1517 if (length > rds_ring->skb_size)
1518 skb_put(skb, rds_ring->skb_size);
1519 else
1520 skb_put(skb, length);
1521
1522 if (pkt_offset)
1523 skb_pull(skb, pkt_offset);
1524
1525 if (!qlcnic_check_loopback_buff(skb->data, adapter->mac_addr))
1526 adapter->ahw->diag_cnt++;
1527 else
1528 dump_skb(skb, adapter);
1529
1530 dev_kfree_skb_any(skb);
1531 adapter->stats.rx_pkts++;
1532 adapter->stats.rxbytes += length;
1533
1534 return;
1535}
1536
1537void qlcnic_82xx_process_rcv_ring_diag(struct qlcnic_host_sds_ring *sds_ring)
1538{
1539 struct qlcnic_adapter *adapter = sds_ring->adapter;
1540 struct status_desc *desc;
1541 u64 sts_data0;
1542 int ring, opcode, desc_cnt;
1543
1544 u32 consumer = sds_ring->consumer;
1545
1546 desc = &sds_ring->desc_head[consumer];
1547 sts_data0 = le64_to_cpu(desc->status_desc_data[0]);
1548
1549 if (!(sts_data0 & STATUS_OWNER_HOST))
1550 return;
1551
1552 desc_cnt = qlcnic_get_sts_desc_cnt(sts_data0);
1553 opcode = qlcnic_get_sts_opcode(sts_data0);
1554 switch (opcode) {
1555 case QLCNIC_RESPONSE_DESC:
1556 qlcnic_handle_fw_message(desc_cnt, consumer, sds_ring);
1557 break;
1558 default:
1559 ring = qlcnic_get_sts_type(sts_data0);
1560 qlcnic_process_rcv_diag(adapter, ring, sts_data0);
1561 break;
1562 }
1563
1564 for (; desc_cnt > 0; desc_cnt--) {
1565 desc = &sds_ring->desc_head[consumer];
1566 desc->status_desc_data[0] = cpu_to_le64(STATUS_OWNER_PHANTOM);
1567 consumer = get_next_index(consumer, sds_ring->num_desc);
1568 }
1569
1570 sds_ring->consumer = consumer;
1571 writel(consumer, sds_ring->crb_sts_consumer);
1572}
1573
1574int qlcnic_82xx_napi_add(struct qlcnic_adapter *adapter,
1575 struct net_device *netdev)
1576{
1577 int ring;
1578 struct qlcnic_host_sds_ring *sds_ring;
1579 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1580 struct qlcnic_host_tx_ring *tx_ring;
1581
1582 if (qlcnic_alloc_sds_rings(recv_ctx, adapter->drv_sds_rings))
1583 return -ENOMEM;
1584
1585 for (ring = 0; ring < adapter->drv_sds_rings; ring++) {
1586 sds_ring = &recv_ctx->sds_rings[ring];
1587 if (qlcnic_check_multi_tx(adapter) &&
1588 !adapter->ahw->diag_test) {
1589 netif_napi_add(netdev, &sds_ring->napi,
1590 qlcnic_rx_poll);
1591 } else {
1592 if (ring == (adapter->drv_sds_rings - 1))
1593 netif_napi_add(netdev, &sds_ring->napi,
1594 qlcnic_poll);
1595 else
1596 netif_napi_add(netdev, &sds_ring->napi,
1597 qlcnic_rx_poll);
1598 }
1599 }
1600
1601 if (qlcnic_alloc_tx_rings(adapter, netdev)) {
1602 qlcnic_free_sds_rings(recv_ctx);
1603 return -ENOMEM;
1604 }
1605
1606 if (qlcnic_check_multi_tx(adapter) && !adapter->ahw->diag_test) {
1607 for (ring = 0; ring < adapter->drv_tx_rings; ring++) {
1608 tx_ring = &adapter->tx_ring[ring];
1609 netif_napi_add_tx(netdev, &tx_ring->napi,
1610 qlcnic_tx_poll);
1611 }
1612 }
1613
1614 return 0;
1615}
1616
1617void qlcnic_82xx_napi_del(struct qlcnic_adapter *adapter)
1618{
1619 int ring;
1620 struct qlcnic_host_sds_ring *sds_ring;
1621 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1622 struct qlcnic_host_tx_ring *tx_ring;
1623
1624 for (ring = 0; ring < adapter->drv_sds_rings; ring++) {
1625 sds_ring = &recv_ctx->sds_rings[ring];
1626 netif_napi_del(&sds_ring->napi);
1627 }
1628
1629 qlcnic_free_sds_rings(adapter->recv_ctx);
1630
1631 if (qlcnic_check_multi_tx(adapter) && !adapter->ahw->diag_test) {
1632 for (ring = 0; ring < adapter->drv_tx_rings; ring++) {
1633 tx_ring = &adapter->tx_ring[ring];
1634 netif_napi_del(&tx_ring->napi);
1635 }
1636 }
1637
1638 qlcnic_free_tx_rings(adapter);
1639}
1640
1641void qlcnic_82xx_napi_enable(struct qlcnic_adapter *adapter)
1642{
1643 int ring;
1644 struct qlcnic_host_sds_ring *sds_ring;
1645 struct qlcnic_host_tx_ring *tx_ring;
1646 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1647
1648 if (adapter->is_up != QLCNIC_ADAPTER_UP_MAGIC)
1649 return;
1650
1651 for (ring = 0; ring < adapter->drv_sds_rings; ring++) {
1652 sds_ring = &recv_ctx->sds_rings[ring];
1653 napi_enable(&sds_ring->napi);
1654 qlcnic_enable_sds_intr(adapter, sds_ring);
1655 }
1656
1657 if (qlcnic_check_multi_tx(adapter) &&
1658 (adapter->flags & QLCNIC_MSIX_ENABLED) &&
1659 !adapter->ahw->diag_test) {
1660 for (ring = 0; ring < adapter->drv_tx_rings; ring++) {
1661 tx_ring = &adapter->tx_ring[ring];
1662 napi_enable(&tx_ring->napi);
1663 qlcnic_enable_tx_intr(adapter, tx_ring);
1664 }
1665 }
1666}
1667
1668void qlcnic_82xx_napi_disable(struct qlcnic_adapter *adapter)
1669{
1670 int ring;
1671 struct qlcnic_host_sds_ring *sds_ring;
1672 struct qlcnic_host_tx_ring *tx_ring;
1673 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1674
1675 if (adapter->is_up != QLCNIC_ADAPTER_UP_MAGIC)
1676 return;
1677
1678 for (ring = 0; ring < adapter->drv_sds_rings; ring++) {
1679 sds_ring = &recv_ctx->sds_rings[ring];
1680 qlcnic_disable_sds_intr(adapter, sds_ring);
1681 napi_synchronize(&sds_ring->napi);
1682 napi_disable(&sds_ring->napi);
1683 }
1684
1685 if ((adapter->flags & QLCNIC_MSIX_ENABLED) &&
1686 !adapter->ahw->diag_test &&
1687 qlcnic_check_multi_tx(adapter)) {
1688 for (ring = 0; ring < adapter->drv_tx_rings; ring++) {
1689 tx_ring = &adapter->tx_ring[ring];
1690 qlcnic_disable_tx_intr(adapter, tx_ring);
1691 napi_synchronize(&tx_ring->napi);
1692 napi_disable(&tx_ring->napi);
1693 }
1694 }
1695}
1696
1697#define QLC_83XX_NORMAL_LB_PKT (1ULL << 36)
1698#define QLC_83XX_LRO_LB_PKT (1ULL << 46)
1699
1700static inline int qlcnic_83xx_is_lb_pkt(u64 sts_data, int lro_pkt)
1701{
1702 if (lro_pkt)
1703 return (sts_data & QLC_83XX_LRO_LB_PKT) ? 1 : 0;
1704 else
1705 return (sts_data & QLC_83XX_NORMAL_LB_PKT) ? 1 : 0;
1706}
1707
1708#define QLCNIC_ENCAP_LENGTH_MASK 0x7f
1709
1710static inline u8 qlcnic_encap_length(u64 sts_data)
1711{
1712 return sts_data & QLCNIC_ENCAP_LENGTH_MASK;
1713}
1714
1715static struct qlcnic_rx_buffer *
1716qlcnic_83xx_process_rcv(struct qlcnic_adapter *adapter,
1717 struct qlcnic_host_sds_ring *sds_ring,
1718 u8 ring, u64 sts_data[])
1719{
1720 struct net_device *netdev = adapter->netdev;
1721 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1722 struct qlcnic_rx_buffer *buffer;
1723 struct sk_buff *skb;
1724 struct qlcnic_host_rds_ring *rds_ring;
1725 int index, length, cksum, is_lb_pkt;
1726 u16 vid = 0xffff;
1727 int err;
1728
1729 if (unlikely(ring >= adapter->max_rds_rings))
1730 return NULL;
1731
1732 rds_ring = &recv_ctx->rds_rings[ring];
1733
1734 index = qlcnic_83xx_hndl(sts_data[0]);
1735 if (unlikely(index >= rds_ring->num_desc))
1736 return NULL;
1737
1738 buffer = &rds_ring->rx_buf_arr[index];
1739 length = qlcnic_83xx_pktln(sts_data[0]);
1740 cksum = qlcnic_83xx_csum_status(sts_data[1]);
1741 skb = qlcnic_process_rxbuf(adapter, rds_ring, index, cksum);
1742 if (!skb)
1743 return buffer;
1744
1745 if (length > rds_ring->skb_size)
1746 skb_put(skb, rds_ring->skb_size);
1747 else
1748 skb_put(skb, length);
1749
1750 err = qlcnic_check_rx_tagging(adapter, skb, &vid);
1751
1752 if (adapter->rx_mac_learn) {
1753 is_lb_pkt = qlcnic_83xx_is_lb_pkt(sts_data[1], 0);
1754 qlcnic_add_lb_filter(adapter, skb, is_lb_pkt, vid);
1755 }
1756
1757 if (unlikely(err)) {
1758 adapter->stats.rxdropped++;
1759 dev_kfree_skb(skb);
1760 return buffer;
1761 }
1762
1763 skb->protocol = eth_type_trans(skb, netdev);
1764
1765 if (qlcnic_encap_length(sts_data[1]) &&
1766 skb->ip_summed == CHECKSUM_UNNECESSARY) {
1767 skb->csum_level = 1;
1768 adapter->stats.encap_rx_csummed++;
1769 }
1770
1771 if (vid != 0xffff)
1772 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid);
1773
1774 napi_gro_receive(&sds_ring->napi, skb);
1775
1776 adapter->stats.rx_pkts++;
1777 adapter->stats.rxbytes += length;
1778
1779 return buffer;
1780}
1781
1782static struct qlcnic_rx_buffer *
1783qlcnic_83xx_process_lro(struct qlcnic_adapter *adapter,
1784 u8 ring, u64 sts_data[])
1785{
1786 struct net_device *netdev = adapter->netdev;
1787 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1788 struct qlcnic_rx_buffer *buffer;
1789 struct sk_buff *skb;
1790 struct qlcnic_host_rds_ring *rds_ring;
1791 struct iphdr *iph;
1792 struct ipv6hdr *ipv6h;
1793 struct tcphdr *th;
1794 bool push;
1795 int l2_hdr_offset, l4_hdr_offset;
1796 int index, is_lb_pkt;
1797 u16 lro_length, length, data_offset, gso_size;
1798 u16 vid = 0xffff;
1799 int err;
1800
1801 if (unlikely(ring >= adapter->max_rds_rings))
1802 return NULL;
1803
1804 rds_ring = &recv_ctx->rds_rings[ring];
1805
1806 index = qlcnic_83xx_hndl(sts_data[0]);
1807 if (unlikely(index >= rds_ring->num_desc))
1808 return NULL;
1809
1810 buffer = &rds_ring->rx_buf_arr[index];
1811
1812 lro_length = qlcnic_83xx_lro_pktln(sts_data[0]);
1813 l2_hdr_offset = qlcnic_83xx_l2_hdr_off(sts_data[1]);
1814 l4_hdr_offset = qlcnic_83xx_l4_hdr_off(sts_data[1]);
1815 push = qlcnic_83xx_is_psh_bit(sts_data[1]);
1816
1817 skb = qlcnic_process_rxbuf(adapter, rds_ring, index, STATUS_CKSUM_OK);
1818 if (!skb)
1819 return buffer;
1820
1821 if (qlcnic_83xx_is_tstamp(sts_data[1]))
1822 data_offset = l4_hdr_offset + QLCNIC_TCP_TS_HDR_SIZE;
1823 else
1824 data_offset = l4_hdr_offset + QLCNIC_TCP_HDR_SIZE;
1825
1826 skb_put(skb, lro_length + data_offset);
1827 skb_pull(skb, l2_hdr_offset);
1828
1829 err = qlcnic_check_rx_tagging(adapter, skb, &vid);
1830
1831 if (adapter->rx_mac_learn) {
1832 is_lb_pkt = qlcnic_83xx_is_lb_pkt(sts_data[1], 1);
1833 qlcnic_add_lb_filter(adapter, skb, is_lb_pkt, vid);
1834 }
1835
1836 if (unlikely(err)) {
1837 adapter->stats.rxdropped++;
1838 dev_kfree_skb(skb);
1839 return buffer;
1840 }
1841
1842 skb->protocol = eth_type_trans(skb, netdev);
1843 if (ntohs(skb->protocol) == ETH_P_IPV6) {
1844 ipv6h = (struct ipv6hdr *)skb->data;
1845 th = (struct tcphdr *)(skb->data + sizeof(struct ipv6hdr));
1846
1847 length = (th->doff << 2) + lro_length;
1848 ipv6h->payload_len = htons(length);
1849 } else {
1850 iph = (struct iphdr *)skb->data;
1851 th = (struct tcphdr *)(skb->data + (iph->ihl << 2));
1852 length = (iph->ihl << 2) + (th->doff << 2) + lro_length;
1853 csum_replace2(&iph->check, iph->tot_len, htons(length));
1854 iph->tot_len = htons(length);
1855 }
1856
1857 th->psh = push;
1858 length = skb->len;
1859
1860 if (adapter->flags & QLCNIC_FW_LRO_MSS_CAP) {
1861 gso_size = qlcnic_83xx_get_lro_sts_mss(sts_data[0]);
1862 skb_shinfo(skb)->gso_size = gso_size;
1863 if (skb->protocol == htons(ETH_P_IPV6))
1864 skb_shinfo(skb)->gso_type = SKB_GSO_TCPV6;
1865 else
1866 skb_shinfo(skb)->gso_type = SKB_GSO_TCPV4;
1867 }
1868
1869 if (vid != 0xffff)
1870 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid);
1871
1872 netif_receive_skb(skb);
1873
1874 adapter->stats.lro_pkts++;
1875 adapter->stats.lrobytes += length;
1876 return buffer;
1877}
1878
1879static int qlcnic_83xx_process_rcv_ring(struct qlcnic_host_sds_ring *sds_ring,
1880 int max)
1881{
1882 struct qlcnic_host_rds_ring *rds_ring;
1883 struct qlcnic_adapter *adapter = sds_ring->adapter;
1884 struct list_head *cur;
1885 struct status_desc *desc;
1886 struct qlcnic_rx_buffer *rxbuf = NULL;
1887 u8 ring;
1888 u64 sts_data[2];
1889 int count = 0, opcode;
1890 u32 consumer = sds_ring->consumer;
1891
1892 while (count < max) {
1893 desc = &sds_ring->desc_head[consumer];
1894 sts_data[1] = le64_to_cpu(desc->status_desc_data[1]);
1895 opcode = qlcnic_83xx_opcode(sts_data[1]);
1896 if (!opcode)
1897 break;
1898 sts_data[0] = le64_to_cpu(desc->status_desc_data[0]);
1899 ring = QLCNIC_FETCH_RING_ID(sts_data[0]);
1900
1901 switch (opcode) {
1902 case QLC_83XX_REG_DESC:
1903 rxbuf = qlcnic_83xx_process_rcv(adapter, sds_ring,
1904 ring, sts_data);
1905 break;
1906 case QLC_83XX_LRO_DESC:
1907 rxbuf = qlcnic_83xx_process_lro(adapter, ring,
1908 sts_data);
1909 break;
1910 default:
1911 dev_info(&adapter->pdev->dev,
1912 "Unknown opcode: 0x%x\n", opcode);
1913 goto skip;
1914 }
1915
1916 if (likely(rxbuf))
1917 list_add_tail(&rxbuf->list, &sds_ring->free_list[ring]);
1918 else
1919 adapter->stats.null_rxbuf++;
1920skip:
1921 desc = &sds_ring->desc_head[consumer];
1922 /* Reset the descriptor */
1923 desc->status_desc_data[1] = 0;
1924 consumer = get_next_index(consumer, sds_ring->num_desc);
1925 count++;
1926 }
1927 for (ring = 0; ring < adapter->max_rds_rings; ring++) {
1928 rds_ring = &adapter->recv_ctx->rds_rings[ring];
1929 if (!list_empty(&sds_ring->free_list[ring])) {
1930 list_for_each(cur, &sds_ring->free_list[ring]) {
1931 rxbuf = list_entry(cur, struct qlcnic_rx_buffer,
1932 list);
1933 qlcnic_alloc_rx_skb(adapter, rds_ring, rxbuf);
1934 }
1935 spin_lock(&rds_ring->lock);
1936 list_splice_tail_init(&sds_ring->free_list[ring],
1937 &rds_ring->free_list);
1938 spin_unlock(&rds_ring->lock);
1939 }
1940 qlcnic_post_rx_buffers_nodb(adapter, rds_ring, ring);
1941 }
1942 if (count) {
1943 sds_ring->consumer = consumer;
1944 writel(consumer, sds_ring->crb_sts_consumer);
1945 }
1946 return count;
1947}
1948
1949static int qlcnic_83xx_msix_sriov_vf_poll(struct napi_struct *napi, int budget)
1950{
1951 int tx_complete;
1952 int work_done;
1953 struct qlcnic_host_sds_ring *sds_ring;
1954 struct qlcnic_adapter *adapter;
1955 struct qlcnic_host_tx_ring *tx_ring;
1956
1957 sds_ring = container_of(napi, struct qlcnic_host_sds_ring, napi);
1958 adapter = sds_ring->adapter;
1959 /* tx ring count = 1 */
1960 tx_ring = adapter->tx_ring;
1961
1962 tx_complete = qlcnic_process_cmd_ring(adapter, tx_ring, budget);
1963 work_done = qlcnic_83xx_process_rcv_ring(sds_ring, budget);
1964
1965 /* Check if we need a repoll */
1966 if (!tx_complete)
1967 work_done = budget;
1968
1969 if (work_done < budget) {
1970 napi_complete_done(&sds_ring->napi, work_done);
1971 qlcnic_enable_sds_intr(adapter, sds_ring);
1972 }
1973
1974 return work_done;
1975}
1976
1977static int qlcnic_83xx_poll(struct napi_struct *napi, int budget)
1978{
1979 int tx_complete;
1980 int work_done;
1981 struct qlcnic_host_sds_ring *sds_ring;
1982 struct qlcnic_adapter *adapter;
1983 struct qlcnic_host_tx_ring *tx_ring;
1984
1985 sds_ring = container_of(napi, struct qlcnic_host_sds_ring, napi);
1986 adapter = sds_ring->adapter;
1987 /* tx ring count = 1 */
1988 tx_ring = adapter->tx_ring;
1989
1990 tx_complete = qlcnic_process_cmd_ring(adapter, tx_ring, budget);
1991 work_done = qlcnic_83xx_process_rcv_ring(sds_ring, budget);
1992
1993 /* Check if we need a repoll */
1994 if (!tx_complete)
1995 work_done = budget;
1996
1997 if (work_done < budget) {
1998 napi_complete_done(&sds_ring->napi, work_done);
1999 qlcnic_enable_sds_intr(adapter, sds_ring);
2000 }
2001
2002 return work_done;
2003}
2004
2005static int qlcnic_83xx_msix_tx_poll(struct napi_struct *napi, int budget)
2006{
2007 int work_done;
2008 struct qlcnic_host_tx_ring *tx_ring;
2009 struct qlcnic_adapter *adapter;
2010
2011 tx_ring = container_of(napi, struct qlcnic_host_tx_ring, napi);
2012 adapter = tx_ring->adapter;
2013 work_done = qlcnic_process_cmd_ring(adapter, tx_ring, budget);
2014 if (work_done) {
2015 napi_complete(&tx_ring->napi);
2016 if (test_bit(__QLCNIC_DEV_UP , &adapter->state))
2017 qlcnic_enable_tx_intr(adapter, tx_ring);
2018 } else {
2019 /* need a repoll */
2020 work_done = budget;
2021 }
2022
2023 return work_done;
2024}
2025
2026static int qlcnic_83xx_rx_poll(struct napi_struct *napi, int budget)
2027{
2028 int work_done;
2029 struct qlcnic_host_sds_ring *sds_ring;
2030 struct qlcnic_adapter *adapter;
2031
2032 sds_ring = container_of(napi, struct qlcnic_host_sds_ring, napi);
2033 adapter = sds_ring->adapter;
2034 work_done = qlcnic_83xx_process_rcv_ring(sds_ring, budget);
2035 if (work_done < budget) {
2036 napi_complete_done(&sds_ring->napi, work_done);
2037 if (test_bit(__QLCNIC_DEV_UP, &adapter->state))
2038 qlcnic_enable_sds_intr(adapter, sds_ring);
2039 }
2040
2041 return work_done;
2042}
2043
2044void qlcnic_83xx_napi_enable(struct qlcnic_adapter *adapter)
2045{
2046 int ring;
2047 struct qlcnic_host_sds_ring *sds_ring;
2048 struct qlcnic_host_tx_ring *tx_ring;
2049 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
2050
2051 if (adapter->is_up != QLCNIC_ADAPTER_UP_MAGIC)
2052 return;
2053
2054 for (ring = 0; ring < adapter->drv_sds_rings; ring++) {
2055 sds_ring = &recv_ctx->sds_rings[ring];
2056 napi_enable(&sds_ring->napi);
2057 if (adapter->flags & QLCNIC_MSIX_ENABLED)
2058 qlcnic_enable_sds_intr(adapter, sds_ring);
2059 }
2060
2061 if ((adapter->flags & QLCNIC_MSIX_ENABLED) &&
2062 !(adapter->flags & QLCNIC_TX_INTR_SHARED)) {
2063 for (ring = 0; ring < adapter->drv_tx_rings; ring++) {
2064 tx_ring = &adapter->tx_ring[ring];
2065 napi_enable(&tx_ring->napi);
2066 qlcnic_enable_tx_intr(adapter, tx_ring);
2067 }
2068 }
2069}
2070
2071void qlcnic_83xx_napi_disable(struct qlcnic_adapter *adapter)
2072{
2073 int ring;
2074 struct qlcnic_host_sds_ring *sds_ring;
2075 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
2076 struct qlcnic_host_tx_ring *tx_ring;
2077
2078 if (adapter->is_up != QLCNIC_ADAPTER_UP_MAGIC)
2079 return;
2080
2081 for (ring = 0; ring < adapter->drv_sds_rings; ring++) {
2082 sds_ring = &recv_ctx->sds_rings[ring];
2083 if (adapter->flags & QLCNIC_MSIX_ENABLED)
2084 qlcnic_disable_sds_intr(adapter, sds_ring);
2085 napi_synchronize(&sds_ring->napi);
2086 napi_disable(&sds_ring->napi);
2087 }
2088
2089 if ((adapter->flags & QLCNIC_MSIX_ENABLED) &&
2090 !(adapter->flags & QLCNIC_TX_INTR_SHARED)) {
2091 for (ring = 0; ring < adapter->drv_tx_rings; ring++) {
2092 tx_ring = &adapter->tx_ring[ring];
2093 qlcnic_disable_tx_intr(adapter, tx_ring);
2094 napi_synchronize(&tx_ring->napi);
2095 napi_disable(&tx_ring->napi);
2096 }
2097 }
2098}
2099
2100int qlcnic_83xx_napi_add(struct qlcnic_adapter *adapter,
2101 struct net_device *netdev)
2102{
2103 int ring;
2104 struct qlcnic_host_sds_ring *sds_ring;
2105 struct qlcnic_host_tx_ring *tx_ring;
2106 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
2107
2108 if (qlcnic_alloc_sds_rings(recv_ctx, adapter->drv_sds_rings))
2109 return -ENOMEM;
2110
2111 for (ring = 0; ring < adapter->drv_sds_rings; ring++) {
2112 sds_ring = &recv_ctx->sds_rings[ring];
2113 if (adapter->flags & QLCNIC_MSIX_ENABLED) {
2114 if (!(adapter->flags & QLCNIC_TX_INTR_SHARED))
2115 netif_napi_add(netdev, &sds_ring->napi,
2116 qlcnic_83xx_rx_poll);
2117 else
2118 netif_napi_add(netdev, &sds_ring->napi,
2119 qlcnic_83xx_msix_sriov_vf_poll);
2120
2121 } else {
2122 netif_napi_add(netdev, &sds_ring->napi,
2123 qlcnic_83xx_poll);
2124 }
2125 }
2126
2127 if (qlcnic_alloc_tx_rings(adapter, netdev)) {
2128 qlcnic_free_sds_rings(recv_ctx);
2129 return -ENOMEM;
2130 }
2131
2132 if ((adapter->flags & QLCNIC_MSIX_ENABLED) &&
2133 !(adapter->flags & QLCNIC_TX_INTR_SHARED)) {
2134 for (ring = 0; ring < adapter->drv_tx_rings; ring++) {
2135 tx_ring = &adapter->tx_ring[ring];
2136 netif_napi_add_tx(netdev, &tx_ring->napi,
2137 qlcnic_83xx_msix_tx_poll);
2138 }
2139 }
2140
2141 return 0;
2142}
2143
2144void qlcnic_83xx_napi_del(struct qlcnic_adapter *adapter)
2145{
2146 int ring;
2147 struct qlcnic_host_sds_ring *sds_ring;
2148 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
2149 struct qlcnic_host_tx_ring *tx_ring;
2150
2151 for (ring = 0; ring < adapter->drv_sds_rings; ring++) {
2152 sds_ring = &recv_ctx->sds_rings[ring];
2153 netif_napi_del(&sds_ring->napi);
2154 }
2155
2156 qlcnic_free_sds_rings(adapter->recv_ctx);
2157
2158 if ((adapter->flags & QLCNIC_MSIX_ENABLED) &&
2159 !(adapter->flags & QLCNIC_TX_INTR_SHARED)) {
2160 for (ring = 0; ring < adapter->drv_tx_rings; ring++) {
2161 tx_ring = &adapter->tx_ring[ring];
2162 netif_napi_del(&tx_ring->napi);
2163 }
2164 }
2165
2166 qlcnic_free_tx_rings(adapter);
2167}
2168
2169static void qlcnic_83xx_process_rcv_diag(struct qlcnic_adapter *adapter,
2170 int ring, u64 sts_data[])
2171{
2172 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
2173 struct sk_buff *skb;
2174 struct qlcnic_host_rds_ring *rds_ring;
2175 int index, length;
2176
2177 if (unlikely(ring >= adapter->max_rds_rings))
2178 return;
2179
2180 rds_ring = &recv_ctx->rds_rings[ring];
2181 index = qlcnic_83xx_hndl(sts_data[0]);
2182 if (unlikely(index >= rds_ring->num_desc))
2183 return;
2184
2185 length = qlcnic_83xx_pktln(sts_data[0]);
2186
2187 skb = qlcnic_process_rxbuf(adapter, rds_ring, index, STATUS_CKSUM_OK);
2188 if (!skb)
2189 return;
2190
2191 if (length > rds_ring->skb_size)
2192 skb_put(skb, rds_ring->skb_size);
2193 else
2194 skb_put(skb, length);
2195
2196 if (!qlcnic_check_loopback_buff(skb->data, adapter->mac_addr))
2197 adapter->ahw->diag_cnt++;
2198 else
2199 dump_skb(skb, adapter);
2200
2201 dev_kfree_skb_any(skb);
2202 return;
2203}
2204
2205void qlcnic_83xx_process_rcv_ring_diag(struct qlcnic_host_sds_ring *sds_ring)
2206{
2207 struct qlcnic_adapter *adapter = sds_ring->adapter;
2208 struct status_desc *desc;
2209 u64 sts_data[2];
2210 int ring, opcode;
2211 u32 consumer = sds_ring->consumer;
2212
2213 desc = &sds_ring->desc_head[consumer];
2214 sts_data[0] = le64_to_cpu(desc->status_desc_data[0]);
2215 sts_data[1] = le64_to_cpu(desc->status_desc_data[1]);
2216 opcode = qlcnic_83xx_opcode(sts_data[1]);
2217 if (!opcode)
2218 return;
2219
2220 ring = QLCNIC_FETCH_RING_ID(sts_data[0]);
2221 qlcnic_83xx_process_rcv_diag(adapter, ring, sts_data);
2222 desc = &sds_ring->desc_head[consumer];
2223 desc->status_desc_data[0] = cpu_to_le64(STATUS_OWNER_PHANTOM);
2224 consumer = get_next_index(consumer, sds_ring->num_desc);
2225 sds_ring->consumer = consumer;
2226 writel(consumer, sds_ring->crb_sts_consumer);
2227}