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[deliverable/linux.git] / drivers / net / ethernet / qlogic / qlcnic / qlcnic_io.c
1 /*
2 * QLogic qlcnic NIC Driver
3 * Copyright (c) 2009-2013 QLogic Corporation
4 *
5 * See LICENSE.qlcnic for copyright and licensing details.
6 */
7
8 #include <linux/netdevice.h>
9 #include <linux/if_vlan.h>
10 #include <net/ip.h>
11 #include <linux/ipv6.h>
12 #include <net/checksum.h>
13 #include <linux/printk.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_TX_POLL_BUDGET 128
106 #define QLCNIC_TCP_HDR_SIZE 20
107 #define QLCNIC_TCP_TS_OPTION_SIZE 12
108 #define QLCNIC_FETCH_RING_ID(handle) ((handle) >> 63)
109 #define QLCNIC_DESC_OWNER_FW cpu_to_le64(STATUS_OWNER_PHANTOM)
110
111 #define QLCNIC_TCP_TS_HDR_SIZE (QLCNIC_TCP_HDR_SIZE + QLCNIC_TCP_TS_OPTION_SIZE)
112
113 /* for status field in status_desc */
114 #define STATUS_CKSUM_LOOP 0
115 #define STATUS_CKSUM_OK 2
116
117 #define qlcnic_83xx_pktln(sts) ((sts >> 32) & 0x3FFF)
118 #define qlcnic_83xx_hndl(sts) ((sts >> 48) & 0x7FFF)
119 #define qlcnic_83xx_csum_status(sts) ((sts >> 39) & 7)
120 #define qlcnic_83xx_opcode(sts) ((sts >> 42) & 0xF)
121 #define qlcnic_83xx_vlan_tag(sts) (((sts) >> 48) & 0xFFFF)
122 #define qlcnic_83xx_lro_pktln(sts) (((sts) >> 32) & 0x3FFF)
123 #define qlcnic_83xx_l2_hdr_off(sts) (((sts) >> 16) & 0xFF)
124 #define qlcnic_83xx_l4_hdr_off(sts) (((sts) >> 24) & 0xFF)
125 #define qlcnic_83xx_pkt_cnt(sts) (((sts) >> 16) & 0x7)
126 #define qlcnic_83xx_is_tstamp(sts) (((sts) >> 40) & 1)
127 #define qlcnic_83xx_is_psh_bit(sts) (((sts) >> 41) & 1)
128 #define qlcnic_83xx_is_ip_align(sts) (((sts) >> 46) & 1)
129 #define qlcnic_83xx_has_vlan_tag(sts) (((sts) >> 47) & 1)
130
131 static int qlcnic_process_rcv_ring(struct qlcnic_host_sds_ring *sds_ring,
132 int max);
133
134 static struct sk_buff *qlcnic_process_rxbuf(struct qlcnic_adapter *,
135 struct qlcnic_host_rds_ring *,
136 u16, u16);
137
138 static inline u8 qlcnic_mac_hash(u64 mac, u16 vlan)
139 {
140 return (u8)((mac & 0xff) ^ ((mac >> 40) & 0xff) ^ (vlan & 0xff));
141 }
142
143 static inline u32 qlcnic_get_ref_handle(struct qlcnic_adapter *adapter,
144 u16 handle, u8 ring_id)
145 {
146 if (qlcnic_83xx_check(adapter))
147 return handle | (ring_id << 15);
148 else
149 return handle;
150 }
151
152 static inline int qlcnic_82xx_is_lb_pkt(u64 sts_data)
153 {
154 return (qlcnic_get_sts_status(sts_data) == STATUS_CKSUM_LOOP) ? 1 : 0;
155 }
156
157 static void qlcnic_delete_rx_list_mac(struct qlcnic_adapter *adapter,
158 struct qlcnic_filter *fil,
159 void *addr, u16 vlan_id)
160 {
161 int ret;
162 u8 op;
163
164 op = vlan_id ? QLCNIC_MAC_VLAN_ADD : QLCNIC_MAC_ADD;
165 ret = qlcnic_sre_macaddr_change(adapter, addr, vlan_id, op);
166 if (ret)
167 return;
168
169 op = vlan_id ? QLCNIC_MAC_VLAN_DEL : QLCNIC_MAC_DEL;
170 ret = qlcnic_sre_macaddr_change(adapter, addr, vlan_id, op);
171 if (!ret) {
172 hlist_del(&fil->fnode);
173 adapter->rx_fhash.fnum--;
174 }
175 }
176
177 static struct qlcnic_filter *qlcnic_find_mac_filter(struct hlist_head *head,
178 void *addr, u16 vlan_id)
179 {
180 struct qlcnic_filter *tmp_fil = NULL;
181 struct hlist_node *n;
182
183 hlist_for_each_entry_safe(tmp_fil, n, head, fnode) {
184 if (ether_addr_equal(tmp_fil->faddr, addr) &&
185 tmp_fil->vlan_id == vlan_id)
186 return tmp_fil;
187 }
188
189 return NULL;
190 }
191
192 static void qlcnic_add_lb_filter(struct qlcnic_adapter *adapter,
193 struct sk_buff *skb, int loopback_pkt, u16 vlan_id)
194 {
195 struct ethhdr *phdr = (struct ethhdr *)(skb->data);
196 struct qlcnic_filter *fil, *tmp_fil;
197 struct hlist_head *head;
198 unsigned long time;
199 u64 src_addr = 0;
200 u8 hindex, op;
201 int ret;
202
203 if (!qlcnic_sriov_pf_check(adapter) || (vlan_id == 0xffff))
204 vlan_id = 0;
205
206 memcpy(&src_addr, phdr->h_source, ETH_ALEN);
207 hindex = qlcnic_mac_hash(src_addr, vlan_id) &
208 (adapter->fhash.fbucket_size - 1);
209
210 if (loopback_pkt) {
211 if (adapter->rx_fhash.fnum >= adapter->rx_fhash.fmax)
212 return;
213
214 head = &(adapter->rx_fhash.fhead[hindex]);
215
216 tmp_fil = qlcnic_find_mac_filter(head, &src_addr, vlan_id);
217 if (tmp_fil) {
218 time = tmp_fil->ftime;
219 if (time_after(jiffies, QLCNIC_READD_AGE * HZ + time))
220 tmp_fil->ftime = jiffies;
221 return;
222 }
223
224 fil = kzalloc(sizeof(struct qlcnic_filter), GFP_ATOMIC);
225 if (!fil)
226 return;
227
228 fil->ftime = jiffies;
229 memcpy(fil->faddr, &src_addr, ETH_ALEN);
230 fil->vlan_id = vlan_id;
231 spin_lock(&adapter->rx_mac_learn_lock);
232 hlist_add_head(&(fil->fnode), head);
233 adapter->rx_fhash.fnum++;
234 spin_unlock(&adapter->rx_mac_learn_lock);
235 } else {
236 head = &adapter->fhash.fhead[hindex];
237
238 spin_lock(&adapter->mac_learn_lock);
239
240 tmp_fil = qlcnic_find_mac_filter(head, &src_addr, vlan_id);
241 if (tmp_fil) {
242 op = vlan_id ? QLCNIC_MAC_VLAN_DEL : QLCNIC_MAC_DEL;
243 ret = qlcnic_sre_macaddr_change(adapter,
244 (u8 *)&src_addr,
245 vlan_id, op);
246 if (!ret) {
247 hlist_del(&tmp_fil->fnode);
248 adapter->fhash.fnum--;
249 }
250
251 spin_unlock(&adapter->mac_learn_lock);
252
253 return;
254 }
255
256 spin_unlock(&adapter->mac_learn_lock);
257
258 head = &adapter->rx_fhash.fhead[hindex];
259
260 spin_lock(&adapter->rx_mac_learn_lock);
261
262 tmp_fil = qlcnic_find_mac_filter(head, &src_addr, vlan_id);
263 if (tmp_fil)
264 qlcnic_delete_rx_list_mac(adapter, tmp_fil, &src_addr,
265 vlan_id);
266
267 spin_unlock(&adapter->rx_mac_learn_lock);
268 }
269 }
270
271 void qlcnic_82xx_change_filter(struct qlcnic_adapter *adapter, u64 *uaddr,
272 u16 vlan_id)
273 {
274 struct cmd_desc_type0 *hwdesc;
275 struct qlcnic_nic_req *req;
276 struct qlcnic_mac_req *mac_req;
277 struct qlcnic_vlan_req *vlan_req;
278 struct qlcnic_host_tx_ring *tx_ring = adapter->tx_ring;
279 u32 producer;
280 u64 word;
281
282 producer = tx_ring->producer;
283 hwdesc = &tx_ring->desc_head[tx_ring->producer];
284
285 req = (struct qlcnic_nic_req *)hwdesc;
286 memset(req, 0, sizeof(struct qlcnic_nic_req));
287 req->qhdr = cpu_to_le64(QLCNIC_REQUEST << 23);
288
289 word = QLCNIC_MAC_EVENT | ((u64)(adapter->portnum) << 16);
290 req->req_hdr = cpu_to_le64(word);
291
292 mac_req = (struct qlcnic_mac_req *)&(req->words[0]);
293 mac_req->op = vlan_id ? QLCNIC_MAC_VLAN_ADD : QLCNIC_MAC_ADD;
294 memcpy(mac_req->mac_addr, uaddr, ETH_ALEN);
295
296 vlan_req = (struct qlcnic_vlan_req *)&req->words[1];
297 vlan_req->vlan_id = cpu_to_le16(vlan_id);
298
299 tx_ring->producer = get_next_index(producer, tx_ring->num_desc);
300 smp_mb();
301 }
302
303 static void qlcnic_send_filter(struct qlcnic_adapter *adapter,
304 struct cmd_desc_type0 *first_desc,
305 struct sk_buff *skb)
306 {
307 struct vlan_ethhdr *vh = (struct vlan_ethhdr *)(skb->data);
308 struct ethhdr *phdr = (struct ethhdr *)(skb->data);
309 u16 protocol = ntohs(skb->protocol);
310 struct qlcnic_filter *fil, *tmp_fil;
311 struct hlist_head *head;
312 struct hlist_node *n;
313 u64 src_addr = 0;
314 u16 vlan_id = 0;
315 u8 hindex, hval;
316
317 if (ether_addr_equal(phdr->h_source, adapter->mac_addr))
318 return;
319
320 if (adapter->flags & QLCNIC_VLAN_FILTERING) {
321 if (protocol == ETH_P_8021Q) {
322 vh = (struct vlan_ethhdr *)skb->data;
323 vlan_id = ntohs(vh->h_vlan_TCI);
324 } else if (skb_vlan_tag_present(skb)) {
325 vlan_id = skb_vlan_tag_get(skb);
326 }
327 }
328
329 memcpy(&src_addr, phdr->h_source, ETH_ALEN);
330 hval = qlcnic_mac_hash(src_addr, vlan_id);
331 hindex = hval & (adapter->fhash.fbucket_size - 1);
332 head = &(adapter->fhash.fhead[hindex]);
333
334 hlist_for_each_entry_safe(tmp_fil, n, head, fnode) {
335 if (ether_addr_equal(tmp_fil->faddr, (u8 *)&src_addr) &&
336 tmp_fil->vlan_id == vlan_id) {
337 if (jiffies > (QLCNIC_READD_AGE * HZ + tmp_fil->ftime))
338 qlcnic_change_filter(adapter, &src_addr,
339 vlan_id);
340 tmp_fil->ftime = jiffies;
341 return;
342 }
343 }
344
345 if (unlikely(adapter->fhash.fnum >= adapter->fhash.fmax)) {
346 adapter->stats.mac_filter_limit_overrun++;
347 return;
348 }
349
350 fil = kzalloc(sizeof(struct qlcnic_filter), GFP_ATOMIC);
351 if (!fil)
352 return;
353
354 qlcnic_change_filter(adapter, &src_addr, vlan_id);
355 fil->ftime = jiffies;
356 fil->vlan_id = vlan_id;
357 memcpy(fil->faddr, &src_addr, ETH_ALEN);
358 spin_lock(&adapter->mac_learn_lock);
359 hlist_add_head(&(fil->fnode), head);
360 adapter->fhash.fnum++;
361 spin_unlock(&adapter->mac_learn_lock);
362 }
363
364 #define QLCNIC_ENCAP_VXLAN_PKT BIT_0
365 #define QLCNIC_ENCAP_OUTER_L3_IP6 BIT_1
366 #define QLCNIC_ENCAP_INNER_L3_IP6 BIT_2
367 #define QLCNIC_ENCAP_INNER_L4_UDP BIT_3
368 #define QLCNIC_ENCAP_DO_L3_CSUM BIT_4
369 #define QLCNIC_ENCAP_DO_L4_CSUM BIT_5
370
371 static int qlcnic_tx_encap_pkt(struct qlcnic_adapter *adapter,
372 struct cmd_desc_type0 *first_desc,
373 struct sk_buff *skb,
374 struct qlcnic_host_tx_ring *tx_ring)
375 {
376 u8 opcode = 0, inner_hdr_len = 0, outer_hdr_len = 0, total_hdr_len = 0;
377 int copied, copy_len, descr_size;
378 u32 producer = tx_ring->producer;
379 struct cmd_desc_type0 *hwdesc;
380 u16 flags = 0, encap_descr = 0;
381
382 opcode = QLCNIC_TX_ETHER_PKT;
383 encap_descr = QLCNIC_ENCAP_VXLAN_PKT;
384
385 if (skb_is_gso(skb)) {
386 inner_hdr_len = skb_inner_transport_header(skb) +
387 inner_tcp_hdrlen(skb) -
388 skb_inner_mac_header(skb);
389
390 /* VXLAN header size = 8 */
391 outer_hdr_len = skb_transport_offset(skb) + 8 +
392 sizeof(struct udphdr);
393 first_desc->outer_hdr_length = outer_hdr_len;
394 total_hdr_len = inner_hdr_len + outer_hdr_len;
395 encap_descr |= QLCNIC_ENCAP_DO_L3_CSUM |
396 QLCNIC_ENCAP_DO_L4_CSUM;
397 first_desc->mss = cpu_to_le16(skb_shinfo(skb)->gso_size);
398 first_desc->hdr_length = inner_hdr_len;
399
400 /* Copy inner and outer headers in Tx descriptor(s)
401 * If total_hdr_len > cmd_desc_type0, use multiple
402 * descriptors
403 */
404 copied = 0;
405 descr_size = (int)sizeof(struct cmd_desc_type0);
406 while (copied < total_hdr_len) {
407 copy_len = min(descr_size, (total_hdr_len - copied));
408 hwdesc = &tx_ring->desc_head[producer];
409 tx_ring->cmd_buf_arr[producer].skb = NULL;
410 skb_copy_from_linear_data_offset(skb, copied,
411 (char *)hwdesc,
412 copy_len);
413 copied += copy_len;
414 producer = get_next_index(producer, tx_ring->num_desc);
415 }
416
417 tx_ring->producer = producer;
418
419 /* Make sure updated tx_ring->producer is visible
420 * for qlcnic_tx_avail()
421 */
422 smp_mb();
423 adapter->stats.encap_lso_frames++;
424
425 opcode = QLCNIC_TX_ENCAP_LSO;
426 } else if (skb->ip_summed == CHECKSUM_PARTIAL) {
427 if (inner_ip_hdr(skb)->version == 6) {
428 if (inner_ipv6_hdr(skb)->nexthdr == IPPROTO_UDP)
429 encap_descr |= QLCNIC_ENCAP_INNER_L4_UDP;
430 } else {
431 if (inner_ip_hdr(skb)->protocol == IPPROTO_UDP)
432 encap_descr |= QLCNIC_ENCAP_INNER_L4_UDP;
433 }
434
435 adapter->stats.encap_tx_csummed++;
436 opcode = QLCNIC_TX_ENCAP_PKT;
437 }
438
439 /* Prepare first 16 bits of byte offset 16 of Tx descriptor */
440 if (ip_hdr(skb)->version == 6)
441 encap_descr |= QLCNIC_ENCAP_OUTER_L3_IP6;
442
443 /* outer IP header's size in 32bit words size*/
444 encap_descr |= (skb_network_header_len(skb) >> 2) << 6;
445
446 /* outer IP header offset */
447 encap_descr |= skb_network_offset(skb) << 10;
448 first_desc->encap_descr = cpu_to_le16(encap_descr);
449
450 first_desc->tcp_hdr_offset = skb_inner_transport_header(skb) -
451 skb->data;
452 first_desc->ip_hdr_offset = skb_inner_network_offset(skb);
453
454 qlcnic_set_tx_flags_opcode(first_desc, flags, opcode);
455
456 return 0;
457 }
458
459 static int qlcnic_tx_pkt(struct qlcnic_adapter *adapter,
460 struct cmd_desc_type0 *first_desc, struct sk_buff *skb,
461 struct qlcnic_host_tx_ring *tx_ring)
462 {
463 u8 l4proto, opcode = 0, hdr_len = 0;
464 u16 flags = 0, vlan_tci = 0;
465 int copied, offset, copy_len, size;
466 struct cmd_desc_type0 *hwdesc;
467 struct vlan_ethhdr *vh;
468 u16 protocol = ntohs(skb->protocol);
469 u32 producer = tx_ring->producer;
470
471 if (protocol == ETH_P_8021Q) {
472 vh = (struct vlan_ethhdr *)skb->data;
473 flags = QLCNIC_FLAGS_VLAN_TAGGED;
474 vlan_tci = ntohs(vh->h_vlan_TCI);
475 protocol = ntohs(vh->h_vlan_encapsulated_proto);
476 } else if (skb_vlan_tag_present(skb)) {
477 flags = QLCNIC_FLAGS_VLAN_OOB;
478 vlan_tci = skb_vlan_tag_get(skb);
479 }
480 if (unlikely(adapter->tx_pvid)) {
481 if (vlan_tci && !(adapter->flags & QLCNIC_TAGGING_ENABLED))
482 return -EIO;
483 if (vlan_tci && (adapter->flags & QLCNIC_TAGGING_ENABLED))
484 goto set_flags;
485
486 flags = QLCNIC_FLAGS_VLAN_OOB;
487 vlan_tci = adapter->tx_pvid;
488 }
489 set_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 /* For LSO, we need to copy the MAC/IP/TCP headers into
506 * the descriptor ring */
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 /* Only in case of TSO on vlan device */
516 flags |= QLCNIC_FLAGS_VLAN_TAGGED;
517
518 /* Create a TSO vlan header template for firmware */
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
579 static 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 struct skb_frag_struct *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 = pci_map_single(pdev, skb->data, skb_headlen(skb),
591 PCI_DMA_TODEVICE);
592 if (pci_dma_mapping_error(pdev, 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
612 unwind:
613 while (--i >= 0) {
614 nf = &pbuf->frag_array[i+1];
615 pci_unmap_page(pdev, nf->dma, nf->length, PCI_DMA_TODEVICE);
616 }
617
618 nf = &pbuf->frag_array[0];
619 pci_unmap_single(pdev, nf->dma, skb_headlen(skb), PCI_DMA_TODEVICE);
620
621 out_err:
622 return -ENOMEM;
623 }
624
625 static 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 pci_unmap_page(pdev, nf->dma, nf->length, PCI_DMA_TODEVICE);
634 }
635
636 nf = &pbuf->frag_array[0];
637 pci_unmap_single(pdev, nf->dma, skb_headlen(skb), PCI_DMA_TODEVICE);
638 pbuf->skb = NULL;
639 }
640
641 static inline void qlcnic_clear_cmddesc(u64 *desc)
642 {
643 desc[0] = 0ULL;
644 desc[2] = 0ULL;
645 desc[7] = 0ULL;
646 }
647
648 netdev_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 /* 14 frags supported for normal packet and
679 * 32 frags supported for TSO packet
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 /* move to next desc.*/
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 /* Check if it is a VXLAN packet */
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);
771
772 tx_ring->tx_stats.tx_bytes += skb->len;
773 tx_ring->tx_stats.xmit_called++;
774
775 /* Ensure writes are complete before HW fetches Tx descriptors */
776 wmb();
777 qlcnic_update_cmd_producer(tx_ring);
778
779 return NETDEV_TX_OK;
780
781 unwind_buff:
782 qlcnic_unmap_buffers(pdev, skb, pbuf);
783 drop_packet:
784 adapter->stats.txdropped++;
785 dev_kfree_skb_any(skb);
786 return NETDEV_TX_OK;
787 }
788
789 void 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 /* Do not advertise Link up to the stack if device
801 * is in loopback mode
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
813 static 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 = pci_map_single(pdev, skb->data,
829 rds_ring->dma_size, PCI_DMA_FROMDEVICE);
830
831 if (pci_dma_mapping_error(pdev, 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
843 static 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 /* make a rcv descriptor */
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
885 static 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 pci_unmap_single(pdev, frag->dma, frag->length,
907 PCI_DMA_TODEVICE);
908 frag->dma = 0ULL;
909 for (i = 1; i < buffer->frag_count; i++) {
910 frag++;
911 pci_unmap_page(pdev, frag->dma, frag->length,
912 PCI_DMA_TODEVICE);
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 * If everything is freed up to consumer then check if the ring is full
940 * If the ring is full then check if more needs to be freed and
941 * schedule the call back again.
942 *
943 * This happens when there are 2 CPUs. One could be freeing and the
944 * other filling it. If the ring is full when we get out of here and
945 * the card has already interrupted the host then the host can miss the
946 * interrupt.
947 *
948 * There is still a possible race condition and the host could miss an
949 * interrupt. The card has to take care of this.
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
959 static 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 /* Check if we need a repoll */
975 if (!tx_complete)
976 work_done = budget;
977
978 if (work_done < budget) {
979 napi_complete(&sds_ring->napi);
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
989 static 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 /* As qlcnic_process_cmd_ring() returned 0, we need a repoll*/
1005 work_done = budget;
1006 }
1007
1008 return work_done;
1009 }
1010
1011 static 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(&sds_ring->napi);
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
1031 static 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
1081 static 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
1137 static 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 pci_unmap_single(adapter->pdev, buffer->dma, ring->dma_size,
1151 PCI_DMA_FROMDEVICE);
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
1168 static 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 /* Outer vlan tag. Packet should follow non-vlan path */
1183 *vlan_tag = 0xffff;
1184 return 0;
1185 }
1186 if (adapter->flags & QLCNIC_TAGGING_ENABLED)
1187 return 0;
1188
1189 return -EINVAL;
1190 }
1191
1192 static struct qlcnic_rx_buffer *
1193 qlcnic_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
1260 static struct qlcnic_rx_buffer *
1261 qlcnic_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
1356 static 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 default:
1394 goto skip;
1395 }
1396 WARN_ON(desc_cnt > 1);
1397
1398 if (likely(rxbuf))
1399 list_add_tail(&rxbuf->list, &sds_ring->free_list[ring]);
1400 else
1401 adapter->stats.null_rxbuf++;
1402 skip:
1403 for (; desc_cnt > 0; desc_cnt--) {
1404 desc = &sds_ring->desc_head[consumer];
1405 desc->status_desc_data[0] = QLCNIC_DESC_OWNER_FW;
1406 consumer = get_next_index(consumer, sds_ring->num_desc);
1407 }
1408 count++;
1409 }
1410
1411 for (ring = 0; ring < adapter->max_rds_rings; ring++) {
1412 rds_ring = &adapter->recv_ctx->rds_rings[ring];
1413 if (!list_empty(&sds_ring->free_list[ring])) {
1414 list_for_each(cur, &sds_ring->free_list[ring]) {
1415 rxbuf = list_entry(cur, struct qlcnic_rx_buffer,
1416 list);
1417 qlcnic_alloc_rx_skb(adapter, rds_ring, rxbuf);
1418 }
1419 spin_lock(&rds_ring->lock);
1420 list_splice_tail_init(&sds_ring->free_list[ring],
1421 &rds_ring->free_list);
1422 spin_unlock(&rds_ring->lock);
1423 }
1424
1425 qlcnic_post_rx_buffers_nodb(adapter, rds_ring, ring);
1426 }
1427
1428 if (count) {
1429 sds_ring->consumer = consumer;
1430 writel(consumer, sds_ring->crb_sts_consumer);
1431 }
1432
1433 return count;
1434 }
1435
1436 void qlcnic_post_rx_buffers(struct qlcnic_adapter *adapter,
1437 struct qlcnic_host_rds_ring *rds_ring, u8 ring_id)
1438 {
1439 struct rcv_desc *pdesc;
1440 struct qlcnic_rx_buffer *buffer;
1441 int count = 0;
1442 u32 producer, handle;
1443 struct list_head *head;
1444
1445 producer = rds_ring->producer;
1446 head = &rds_ring->free_list;
1447
1448 while (!list_empty(head)) {
1449
1450 buffer = list_entry(head->next, struct qlcnic_rx_buffer, list);
1451
1452 if (!buffer->skb) {
1453 if (qlcnic_alloc_rx_skb(adapter, rds_ring, buffer))
1454 break;
1455 }
1456
1457 count++;
1458 list_del(&buffer->list);
1459
1460 /* make a rcv descriptor */
1461 pdesc = &rds_ring->desc_head[producer];
1462 pdesc->addr_buffer = cpu_to_le64(buffer->dma);
1463 handle = qlcnic_get_ref_handle(adapter, buffer->ref_handle,
1464 ring_id);
1465 pdesc->reference_handle = cpu_to_le16(handle);
1466 pdesc->buffer_length = cpu_to_le32(rds_ring->dma_size);
1467 producer = get_next_index(producer, rds_ring->num_desc);
1468 }
1469
1470 if (count) {
1471 rds_ring->producer = producer;
1472 writel((producer-1) & (rds_ring->num_desc-1),
1473 rds_ring->crb_rcv_producer);
1474 }
1475 }
1476
1477 static void dump_skb(struct sk_buff *skb, struct qlcnic_adapter *adapter)
1478 {
1479 if (adapter->ahw->msg_enable & NETIF_MSG_DRV) {
1480 char prefix[30];
1481
1482 scnprintf(prefix, sizeof(prefix), "%s: %s: ",
1483 dev_name(&adapter->pdev->dev), __func__);
1484
1485 print_hex_dump_debug(prefix, DUMP_PREFIX_NONE, 16, 1,
1486 skb->data, skb->len, true);
1487 }
1488 }
1489
1490 static void qlcnic_process_rcv_diag(struct qlcnic_adapter *adapter, int ring,
1491 u64 sts_data0)
1492 {
1493 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1494 struct sk_buff *skb;
1495 struct qlcnic_host_rds_ring *rds_ring;
1496 int index, length, cksum, pkt_offset;
1497
1498 if (unlikely(ring >= adapter->max_rds_rings))
1499 return;
1500
1501 rds_ring = &recv_ctx->rds_rings[ring];
1502
1503 index = qlcnic_get_sts_refhandle(sts_data0);
1504 length = qlcnic_get_sts_totallength(sts_data0);
1505 if (unlikely(index >= rds_ring->num_desc))
1506 return;
1507
1508 cksum = qlcnic_get_sts_status(sts_data0);
1509 pkt_offset = qlcnic_get_sts_pkt_offset(sts_data0);
1510
1511 skb = qlcnic_process_rxbuf(adapter, rds_ring, index, cksum);
1512 if (!skb)
1513 return;
1514
1515 if (length > rds_ring->skb_size)
1516 skb_put(skb, rds_ring->skb_size);
1517 else
1518 skb_put(skb, length);
1519
1520 if (pkt_offset)
1521 skb_pull(skb, pkt_offset);
1522
1523 if (!qlcnic_check_loopback_buff(skb->data, adapter->mac_addr))
1524 adapter->ahw->diag_cnt++;
1525 else
1526 dump_skb(skb, adapter);
1527
1528 dev_kfree_skb_any(skb);
1529 adapter->stats.rx_pkts++;
1530 adapter->stats.rxbytes += length;
1531
1532 return;
1533 }
1534
1535 void qlcnic_82xx_process_rcv_ring_diag(struct qlcnic_host_sds_ring *sds_ring)
1536 {
1537 struct qlcnic_adapter *adapter = sds_ring->adapter;
1538 struct status_desc *desc;
1539 u64 sts_data0;
1540 int ring, opcode, desc_cnt;
1541
1542 u32 consumer = sds_ring->consumer;
1543
1544 desc = &sds_ring->desc_head[consumer];
1545 sts_data0 = le64_to_cpu(desc->status_desc_data[0]);
1546
1547 if (!(sts_data0 & STATUS_OWNER_HOST))
1548 return;
1549
1550 desc_cnt = qlcnic_get_sts_desc_cnt(sts_data0);
1551 opcode = qlcnic_get_sts_opcode(sts_data0);
1552 switch (opcode) {
1553 case QLCNIC_RESPONSE_DESC:
1554 qlcnic_handle_fw_message(desc_cnt, consumer, sds_ring);
1555 break;
1556 default:
1557 ring = qlcnic_get_sts_type(sts_data0);
1558 qlcnic_process_rcv_diag(adapter, ring, sts_data0);
1559 break;
1560 }
1561
1562 for (; desc_cnt > 0; desc_cnt--) {
1563 desc = &sds_ring->desc_head[consumer];
1564 desc->status_desc_data[0] = cpu_to_le64(STATUS_OWNER_PHANTOM);
1565 consumer = get_next_index(consumer, sds_ring->num_desc);
1566 }
1567
1568 sds_ring->consumer = consumer;
1569 writel(consumer, sds_ring->crb_sts_consumer);
1570 }
1571
1572 int qlcnic_82xx_napi_add(struct qlcnic_adapter *adapter,
1573 struct net_device *netdev)
1574 {
1575 int ring;
1576 struct qlcnic_host_sds_ring *sds_ring;
1577 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1578 struct qlcnic_host_tx_ring *tx_ring;
1579
1580 if (qlcnic_alloc_sds_rings(recv_ctx, adapter->drv_sds_rings))
1581 return -ENOMEM;
1582
1583 for (ring = 0; ring < adapter->drv_sds_rings; ring++) {
1584 sds_ring = &recv_ctx->sds_rings[ring];
1585 if (qlcnic_check_multi_tx(adapter) &&
1586 !adapter->ahw->diag_test) {
1587 netif_napi_add(netdev, &sds_ring->napi, qlcnic_rx_poll,
1588 NAPI_POLL_WEIGHT);
1589 } else {
1590 if (ring == (adapter->drv_sds_rings - 1))
1591 netif_napi_add(netdev, &sds_ring->napi,
1592 qlcnic_poll,
1593 NAPI_POLL_WEIGHT);
1594 else
1595 netif_napi_add(netdev, &sds_ring->napi,
1596 qlcnic_rx_poll,
1597 NAPI_POLL_WEIGHT);
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_tx_napi_add(netdev, &tx_ring->napi, qlcnic_tx_poll,
1610 NAPI_POLL_WEIGHT);
1611 }
1612 }
1613
1614 return 0;
1615 }
1616
1617 void 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
1641 void 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
1668 void 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
1700 static 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
1710 static inline u8 qlcnic_encap_length(u64 sts_data)
1711 {
1712 return sts_data & QLCNIC_ENCAP_LENGTH_MASK;
1713 }
1714
1715 static struct qlcnic_rx_buffer *
1716 qlcnic_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
1782 static struct qlcnic_rx_buffer *
1783 qlcnic_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
1879 static 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++;
1920 skip:
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
1949 static 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(&sds_ring->napi);
1971 qlcnic_enable_sds_intr(adapter, sds_ring);
1972 }
1973
1974 return work_done;
1975 }
1976
1977 static 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(&sds_ring->napi);
1999 qlcnic_enable_sds_intr(adapter, sds_ring);
2000 }
2001
2002 return work_done;
2003 }
2004
2005 static 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 budget = QLCNIC_TX_POLL_BUDGET;
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 /* need a repoll */
2021 work_done = budget;
2022 }
2023
2024 return work_done;
2025 }
2026
2027 static 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(&sds_ring->napi);
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
2045 void 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
2072 void 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
2101 int 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
2149 void 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
2174 static 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
2210 void 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 }
Linux kernel - Deliverables
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