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treewide: remove redundant IS_ERR() before error code check
[linux/fpc-iii.git] / drivers / net / ethernet / qlogic / qlcnic / qlcnic_io.c
blobac61f614de37926423f03602d74b7a0ae6d741ad
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_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
130 static int qlcnic_process_rcv_ring(struct qlcnic_host_sds_ring *sds_ring,
131 int max);
132
133 static struct sk_buff *qlcnic_process_rxbuf(struct qlcnic_adapter *,
134 struct qlcnic_host_rds_ring *,
135 u16, u16);
136
137 static inline u8 qlcnic_mac_hash(u64 mac, u16 vlan)
138 {
139 return (u8)((mac & 0xff) ^ ((mac >> 40) & 0xff) ^ (vlan & 0xff));
140 }
141
142 static 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
151 static 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
156 static 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
176 static 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
191 static 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
270 void 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
301 static 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 = (struct vlan_ethhdr *)skb->data;
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 (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
370 static 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
458 static 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 = (struct vlan_ethhdr *)skb->data;
472 flags = QLCNIC_FLAGS_VLAN_TAGGED;
473 vlan_tci = ntohs(vh->h_vlan_TCI);
474 protocol = ntohs(vh->h_vlan_encapsulated_proto);
475 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 }
490 set_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_transport_offset(skb) + tcp_hdrlen(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
580 static 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 = pci_map_single(pdev, skb->data, skb_headlen(skb),
592 PCI_DMA_TODEVICE);
593 if (pci_dma_mapping_error(pdev, 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
613 unwind:
614 while (--i >= 0) {
615 nf = &pbuf->frag_array[i+1];
616 pci_unmap_page(pdev, nf->dma, nf->length, PCI_DMA_TODEVICE);
617 }
618
619 nf = &pbuf->frag_array[0];
620 pci_unmap_single(pdev, nf->dma, skb_headlen(skb), PCI_DMA_TODEVICE);
621
622 out_err:
623 return -ENOMEM;
624 }
625
626 static 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 pci_unmap_page(pdev, nf->dma, nf->length, PCI_DMA_TODEVICE);
635 }
636
637 nf = &pbuf->frag_array[0];
638 pci_unmap_single(pdev, nf->dma, skb_headlen(skb), PCI_DMA_TODEVICE);
639 pbuf->skb = NULL;
640 }
641
642 static inline void qlcnic_clear_cmddesc(u64 *desc)
643 {
644 desc[0] = 0ULL;
645 desc[2] = 0ULL;
646 desc[7] = 0ULL;
647 }
648
649 netdev_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
782 unwind_buff:
783 qlcnic_unmap_buffers(pdev, skb, pbuf);
784 drop_packet:
785 adapter->stats.txdropped++;
786 dev_kfree_skb_any(skb);
787 return NETDEV_TX_OK;
788 }
789
790 void 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
814 static 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 = pci_map_single(pdev, skb->data,
830 rds_ring->dma_size, PCI_DMA_FROMDEVICE);
831
832 if (pci_dma_mapping_error(pdev, 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
844 static 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
886 static 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 pci_unmap_single(pdev, frag->dma, frag->length,
908 PCI_DMA_TODEVICE);
909 frag->dma = 0ULL;
910 for (i = 1; i < buffer->frag_count; i++) {
911 frag++;
912 pci_unmap_page(pdev, frag->dma, frag->length,
913 PCI_DMA_TODEVICE);
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
960 static 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
990 static 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
1012 static 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
1032 static 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
1082 static 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
1138 static 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 pci_unmap_single(adapter->pdev, buffer->dma, ring->dma_size,
1152 PCI_DMA_FROMDEVICE);
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
1169 static 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
1193 static struct qlcnic_rx_buffer *
1194 qlcnic_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
1261 static struct qlcnic_rx_buffer *
1262 qlcnic_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
1357 static 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 default:
1395 goto skip;
1396 }
1397 WARN_ON(desc_cnt > 1);
1398
1399 if (likely(rxbuf))
1400 list_add_tail(&rxbuf->list, &sds_ring->free_list[ring]);
1401 else
1402 adapter->stats.null_rxbuf++;
1403 skip:
1404 for (; desc_cnt > 0; desc_cnt--) {
1405 desc = &sds_ring->desc_head[consumer];
1406 desc->status_desc_data[0] = QLCNIC_DESC_OWNER_FW;
1407 consumer = get_next_index(consumer, sds_ring->num_desc);
1408 }
1409 count++;
1410 }
1411
1412 for (ring = 0; ring < adapter->max_rds_rings; ring++) {
1413 rds_ring = &adapter->recv_ctx->rds_rings[ring];
1414 if (!list_empty(&sds_ring->free_list[ring])) {
1415 list_for_each(cur, &sds_ring->free_list[ring]) {
1416 rxbuf = list_entry(cur, struct qlcnic_rx_buffer,
1417 list);
1418 qlcnic_alloc_rx_skb(adapter, rds_ring, rxbuf);
1419 }
1420 spin_lock(&rds_ring->lock);
1421 list_splice_tail_init(&sds_ring->free_list[ring],
1422 &rds_ring->free_list);
1423 spin_unlock(&rds_ring->lock);
1424 }
1425
1426 qlcnic_post_rx_buffers_nodb(adapter, rds_ring, ring);
1427 }
1428
1429 if (count) {
1430 sds_ring->consumer = consumer;
1431 writel(consumer, sds_ring->crb_sts_consumer);
1432 }
1433
1434 return count;
1435 }
1436
1437 void qlcnic_post_rx_buffers(struct qlcnic_adapter *adapter,
1438 struct qlcnic_host_rds_ring *rds_ring, u8 ring_id)
1439 {
1440 struct rcv_desc *pdesc;
1441 struct qlcnic_rx_buffer *buffer;
1442 int count = 0;
1443 u32 producer, handle;
1444 struct list_head *head;
1445
1446 producer = rds_ring->producer;
1447 head = &rds_ring->free_list;
1448
1449 while (!list_empty(head)) {
1450
1451 buffer = list_entry(head->next, struct qlcnic_rx_buffer, list);
1452
1453 if (!buffer->skb) {
1454 if (qlcnic_alloc_rx_skb(adapter, rds_ring, buffer))
1455 break;
1456 }
1457
1458 count++;
1459 list_del(&buffer->list);
1460
1461 /* make a rcv descriptor */
1462 pdesc = &rds_ring->desc_head[producer];
1463 pdesc->addr_buffer = cpu_to_le64(buffer->dma);
1464 handle = qlcnic_get_ref_handle(adapter, buffer->ref_handle,
1465 ring_id);
1466 pdesc->reference_handle = cpu_to_le16(handle);
1467 pdesc->buffer_length = cpu_to_le32(rds_ring->dma_size);
1468 producer = get_next_index(producer, rds_ring->num_desc);
1469 }
1470
1471 if (count) {
1472 rds_ring->producer = producer;
1473 writel((producer-1) & (rds_ring->num_desc-1),
1474 rds_ring->crb_rcv_producer);
1475 }
1476 }
1477
1478 static void dump_skb(struct sk_buff *skb, struct qlcnic_adapter *adapter)
1479 {
1480 if (adapter->ahw->msg_enable & NETIF_MSG_DRV) {
1481 char prefix[30];
1482
1483 scnprintf(prefix, sizeof(prefix), "%s: %s: ",
1484 dev_name(&adapter->pdev->dev), __func__);
1485
1486 print_hex_dump_debug(prefix, DUMP_PREFIX_NONE, 16, 1,
1487 skb->data, skb->len, true);
1488 }
1489 }
1490
1491 static void qlcnic_process_rcv_diag(struct qlcnic_adapter *adapter, int ring,
1492 u64 sts_data0)
1493 {
1494 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1495 struct sk_buff *skb;
1496 struct qlcnic_host_rds_ring *rds_ring;
1497 int index, length, cksum, pkt_offset;
1498
1499 if (unlikely(ring >= adapter->max_rds_rings))
1500 return;
1501
1502 rds_ring = &recv_ctx->rds_rings[ring];
1503
1504 index = qlcnic_get_sts_refhandle(sts_data0);
1505 length = qlcnic_get_sts_totallength(sts_data0);
1506 if (unlikely(index >= rds_ring->num_desc))
1507 return;
1508
1509 cksum = qlcnic_get_sts_status(sts_data0);
1510 pkt_offset = qlcnic_get_sts_pkt_offset(sts_data0);
1511
1512 skb = qlcnic_process_rxbuf(adapter, rds_ring, index, cksum);
1513 if (!skb)
1514 return;
1515
1516 if (length > rds_ring->skb_size)
1517 skb_put(skb, rds_ring->skb_size);
1518 else
1519 skb_put(skb, length);
1520
1521 if (pkt_offset)
1522 skb_pull(skb, pkt_offset);
1523
1524 if (!qlcnic_check_loopback_buff(skb->data, adapter->mac_addr))
1525 adapter->ahw->diag_cnt++;
1526 else
1527 dump_skb(skb, adapter);
1528
1529 dev_kfree_skb_any(skb);
1530 adapter->stats.rx_pkts++;
1531 adapter->stats.rxbytes += length;
1532
1533 return;
1534 }
1535
1536 void qlcnic_82xx_process_rcv_ring_diag(struct qlcnic_host_sds_ring *sds_ring)
1537 {
1538 struct qlcnic_adapter *adapter = sds_ring->adapter;
1539 struct status_desc *desc;
1540 u64 sts_data0;
1541 int ring, opcode, desc_cnt;
1542
1543 u32 consumer = sds_ring->consumer;
1544
1545 desc = &sds_ring->desc_head[consumer];
1546 sts_data0 = le64_to_cpu(desc->status_desc_data[0]);
1547
1548 if (!(sts_data0 & STATUS_OWNER_HOST))
1549 return;
1550
1551 desc_cnt = qlcnic_get_sts_desc_cnt(sts_data0);
1552 opcode = qlcnic_get_sts_opcode(sts_data0);
1553 switch (opcode) {
1554 case QLCNIC_RESPONSE_DESC:
1555 qlcnic_handle_fw_message(desc_cnt, consumer, sds_ring);
1556 break;
1557 default:
1558 ring = qlcnic_get_sts_type(sts_data0);
1559 qlcnic_process_rcv_diag(adapter, ring, sts_data0);
1560 break;
1561 }
1562
1563 for (; desc_cnt > 0; desc_cnt--) {
1564 desc = &sds_ring->desc_head[consumer];
1565 desc->status_desc_data[0] = cpu_to_le64(STATUS_OWNER_PHANTOM);
1566 consumer = get_next_index(consumer, sds_ring->num_desc);
1567 }
1568
1569 sds_ring->consumer = consumer;
1570 writel(consumer, sds_ring->crb_sts_consumer);
1571 }
1572
1573 int qlcnic_82xx_napi_add(struct qlcnic_adapter *adapter,
1574 struct net_device *netdev)
1575 {
1576 int ring;
1577 struct qlcnic_host_sds_ring *sds_ring;
1578 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1579 struct qlcnic_host_tx_ring *tx_ring;
1580
1581 if (qlcnic_alloc_sds_rings(recv_ctx, adapter->drv_sds_rings))
1582 return -ENOMEM;
1583
1584 for (ring = 0; ring < adapter->drv_sds_rings; ring++) {
1585 sds_ring = &recv_ctx->sds_rings[ring];
1586 if (qlcnic_check_multi_tx(adapter) &&
1587 !adapter->ahw->diag_test) {
1588 netif_napi_add(netdev, &sds_ring->napi, qlcnic_rx_poll,
1589 NAPI_POLL_WEIGHT);
1590 } else {
1591 if (ring == (adapter->drv_sds_rings - 1))
1592 netif_napi_add(netdev, &sds_ring->napi,
1593 qlcnic_poll,
1594 NAPI_POLL_WEIGHT);
1595 else
1596 netif_napi_add(netdev, &sds_ring->napi,
1597 qlcnic_rx_poll,
1598 NAPI_POLL_WEIGHT);
1599 }
1600 }
1601
1602 if (qlcnic_alloc_tx_rings(adapter, netdev)) {
1603 qlcnic_free_sds_rings(recv_ctx);
1604 return -ENOMEM;
1605 }
1606
1607 if (qlcnic_check_multi_tx(adapter) && !adapter->ahw->diag_test) {
1608 for (ring = 0; ring < adapter->drv_tx_rings; ring++) {
1609 tx_ring = &adapter->tx_ring[ring];
1610 netif_tx_napi_add(netdev, &tx_ring->napi, qlcnic_tx_poll,
1611 NAPI_POLL_WEIGHT);
1612 }
1613 }
1614
1615 return 0;
1616 }
1617
1618 void qlcnic_82xx_napi_del(struct qlcnic_adapter *adapter)
1619 {
1620 int ring;
1621 struct qlcnic_host_sds_ring *sds_ring;
1622 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1623 struct qlcnic_host_tx_ring *tx_ring;
1624
1625 for (ring = 0; ring < adapter->drv_sds_rings; ring++) {
1626 sds_ring = &recv_ctx->sds_rings[ring];
1627 netif_napi_del(&sds_ring->napi);
1628 }
1629
1630 qlcnic_free_sds_rings(adapter->recv_ctx);
1631
1632 if (qlcnic_check_multi_tx(adapter) && !adapter->ahw->diag_test) {
1633 for (ring = 0; ring < adapter->drv_tx_rings; ring++) {
1634 tx_ring = &adapter->tx_ring[ring];
1635 netif_napi_del(&tx_ring->napi);
1636 }
1637 }
1638
1639 qlcnic_free_tx_rings(adapter);
1640 }
1641
1642 void qlcnic_82xx_napi_enable(struct qlcnic_adapter *adapter)
1643 {
1644 int ring;
1645 struct qlcnic_host_sds_ring *sds_ring;
1646 struct qlcnic_host_tx_ring *tx_ring;
1647 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1648
1649 if (adapter->is_up != QLCNIC_ADAPTER_UP_MAGIC)
1650 return;
1651
1652 for (ring = 0; ring < adapter->drv_sds_rings; ring++) {
1653 sds_ring = &recv_ctx->sds_rings[ring];
1654 napi_enable(&sds_ring->napi);
1655 qlcnic_enable_sds_intr(adapter, sds_ring);
1656 }
1657
1658 if (qlcnic_check_multi_tx(adapter) &&
1659 (adapter->flags & QLCNIC_MSIX_ENABLED) &&
1660 !adapter->ahw->diag_test) {
1661 for (ring = 0; ring < adapter->drv_tx_rings; ring++) {
1662 tx_ring = &adapter->tx_ring[ring];
1663 napi_enable(&tx_ring->napi);
1664 qlcnic_enable_tx_intr(adapter, tx_ring);
1665 }
1666 }
1667 }
1668
1669 void qlcnic_82xx_napi_disable(struct qlcnic_adapter *adapter)
1670 {
1671 int ring;
1672 struct qlcnic_host_sds_ring *sds_ring;
1673 struct qlcnic_host_tx_ring *tx_ring;
1674 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1675
1676 if (adapter->is_up != QLCNIC_ADAPTER_UP_MAGIC)
1677 return;
1678
1679 for (ring = 0; ring < adapter->drv_sds_rings; ring++) {
1680 sds_ring = &recv_ctx->sds_rings[ring];
1681 qlcnic_disable_sds_intr(adapter, sds_ring);
1682 napi_synchronize(&sds_ring->napi);
1683 napi_disable(&sds_ring->napi);
1684 }
1685
1686 if ((adapter->flags & QLCNIC_MSIX_ENABLED) &&
1687 !adapter->ahw->diag_test &&
1688 qlcnic_check_multi_tx(adapter)) {
1689 for (ring = 0; ring < adapter->drv_tx_rings; ring++) {
1690 tx_ring = &adapter->tx_ring[ring];
1691 qlcnic_disable_tx_intr(adapter, tx_ring);
1692 napi_synchronize(&tx_ring->napi);
1693 napi_disable(&tx_ring->napi);
1694 }
1695 }
1696 }
1697
1698 #define QLC_83XX_NORMAL_LB_PKT (1ULL << 36)
1699 #define QLC_83XX_LRO_LB_PKT (1ULL << 46)
1700
1701 static inline int qlcnic_83xx_is_lb_pkt(u64 sts_data, int lro_pkt)
1702 {
1703 if (lro_pkt)
1704 return (sts_data & QLC_83XX_LRO_LB_PKT) ? 1 : 0;
1705 else
1706 return (sts_data & QLC_83XX_NORMAL_LB_PKT) ? 1 : 0;
1707 }
1708
1709 #define QLCNIC_ENCAP_LENGTH_MASK 0x7f
1710
1711 static inline u8 qlcnic_encap_length(u64 sts_data)
1712 {
1713 return sts_data & QLCNIC_ENCAP_LENGTH_MASK;
1714 }
1715
1716 static struct qlcnic_rx_buffer *
1717 qlcnic_83xx_process_rcv(struct qlcnic_adapter *adapter,
1718 struct qlcnic_host_sds_ring *sds_ring,
1719 u8 ring, u64 sts_data[])
1720 {
1721 struct net_device *netdev = adapter->netdev;
1722 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1723 struct qlcnic_rx_buffer *buffer;
1724 struct sk_buff *skb;
1725 struct qlcnic_host_rds_ring *rds_ring;
1726 int index, length, cksum, is_lb_pkt;
1727 u16 vid = 0xffff;
1728 int err;
1729
1730 if (unlikely(ring >= adapter->max_rds_rings))
1731 return NULL;
1732
1733 rds_ring = &recv_ctx->rds_rings[ring];
1734
1735 index = qlcnic_83xx_hndl(sts_data[0]);
1736 if (unlikely(index >= rds_ring->num_desc))
1737 return NULL;
1738
1739 buffer = &rds_ring->rx_buf_arr[index];
1740 length = qlcnic_83xx_pktln(sts_data[0]);
1741 cksum = qlcnic_83xx_csum_status(sts_data[1]);
1742 skb = qlcnic_process_rxbuf(adapter, rds_ring, index, cksum);
1743 if (!skb)
1744 return buffer;
1745
1746 if (length > rds_ring->skb_size)
1747 skb_put(skb, rds_ring->skb_size);
1748 else
1749 skb_put(skb, length);
1750
1751 err = qlcnic_check_rx_tagging(adapter, skb, &vid);
1752
1753 if (adapter->rx_mac_learn) {
1754 is_lb_pkt = qlcnic_83xx_is_lb_pkt(sts_data[1], 0);
1755 qlcnic_add_lb_filter(adapter, skb, is_lb_pkt, vid);
1756 }
1757
1758 if (unlikely(err)) {
1759 adapter->stats.rxdropped++;
1760 dev_kfree_skb(skb);
1761 return buffer;
1762 }
1763
1764 skb->protocol = eth_type_trans(skb, netdev);
1765
1766 if (qlcnic_encap_length(sts_data[1]) &&
1767 skb->ip_summed == CHECKSUM_UNNECESSARY) {
1768 skb->csum_level = 1;
1769 adapter->stats.encap_rx_csummed++;
1770 }
1771
1772 if (vid != 0xffff)
1773 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid);
1774
1775 napi_gro_receive(&sds_ring->napi, skb);
1776
1777 adapter->stats.rx_pkts++;
1778 adapter->stats.rxbytes += length;
1779
1780 return buffer;
1781 }
1782
1783 static struct qlcnic_rx_buffer *
1784 qlcnic_83xx_process_lro(struct qlcnic_adapter *adapter,
1785 u8 ring, u64 sts_data[])
1786 {
1787 struct net_device *netdev = adapter->netdev;
1788 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1789 struct qlcnic_rx_buffer *buffer;
1790 struct sk_buff *skb;
1791 struct qlcnic_host_rds_ring *rds_ring;
1792 struct iphdr *iph;
1793 struct ipv6hdr *ipv6h;
1794 struct tcphdr *th;
1795 bool push;
1796 int l2_hdr_offset, l4_hdr_offset;
1797 int index, is_lb_pkt;
1798 u16 lro_length, length, data_offset, gso_size;
1799 u16 vid = 0xffff;
1800 int err;
1801
1802 if (unlikely(ring >= adapter->max_rds_rings))
1803 return NULL;
1804
1805 rds_ring = &recv_ctx->rds_rings[ring];
1806
1807 index = qlcnic_83xx_hndl(sts_data[0]);
1808 if (unlikely(index >= rds_ring->num_desc))
1809 return NULL;
1810
1811 buffer = &rds_ring->rx_buf_arr[index];
1812
1813 lro_length = qlcnic_83xx_lro_pktln(sts_data[0]);
1814 l2_hdr_offset = qlcnic_83xx_l2_hdr_off(sts_data[1]);
1815 l4_hdr_offset = qlcnic_83xx_l4_hdr_off(sts_data[1]);
1816 push = qlcnic_83xx_is_psh_bit(sts_data[1]);
1817
1818 skb = qlcnic_process_rxbuf(adapter, rds_ring, index, STATUS_CKSUM_OK);
1819 if (!skb)
1820 return buffer;
1821
1822 if (qlcnic_83xx_is_tstamp(sts_data[1]))
1823 data_offset = l4_hdr_offset + QLCNIC_TCP_TS_HDR_SIZE;
1824 else
1825 data_offset = l4_hdr_offset + QLCNIC_TCP_HDR_SIZE;
1826
1827 skb_put(skb, lro_length + data_offset);
1828 skb_pull(skb, l2_hdr_offset);
1829
1830 err = qlcnic_check_rx_tagging(adapter, skb, &vid);
1831
1832 if (adapter->rx_mac_learn) {
1833 is_lb_pkt = qlcnic_83xx_is_lb_pkt(sts_data[1], 1);
1834 qlcnic_add_lb_filter(adapter, skb, is_lb_pkt, vid);
1835 }
1836
1837 if (unlikely(err)) {
1838 adapter->stats.rxdropped++;
1839 dev_kfree_skb(skb);
1840 return buffer;
1841 }
1842
1843 skb->protocol = eth_type_trans(skb, netdev);
1844 if (ntohs(skb->protocol) == ETH_P_IPV6) {
1845 ipv6h = (struct ipv6hdr *)skb->data;
1846 th = (struct tcphdr *)(skb->data + sizeof(struct ipv6hdr));
1847
1848 length = (th->doff << 2) + lro_length;
1849 ipv6h->payload_len = htons(length);
1850 } else {
1851 iph = (struct iphdr *)skb->data;
1852 th = (struct tcphdr *)(skb->data + (iph->ihl << 2));
1853 length = (iph->ihl << 2) + (th->doff << 2) + lro_length;
1854 csum_replace2(&iph->check, iph->tot_len, htons(length));
1855 iph->tot_len = htons(length);
1856 }
1857
1858 th->psh = push;
1859 length = skb->len;
1860
1861 if (adapter->flags & QLCNIC_FW_LRO_MSS_CAP) {
1862 gso_size = qlcnic_83xx_get_lro_sts_mss(sts_data[0]);
1863 skb_shinfo(skb)->gso_size = gso_size;
1864 if (skb->protocol == htons(ETH_P_IPV6))
1865 skb_shinfo(skb)->gso_type = SKB_GSO_TCPV6;
1866 else
1867 skb_shinfo(skb)->gso_type = SKB_GSO_TCPV4;
1868 }
1869
1870 if (vid != 0xffff)
1871 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid);
1872
1873 netif_receive_skb(skb);
1874
1875 adapter->stats.lro_pkts++;
1876 adapter->stats.lrobytes += length;
1877 return buffer;
1878 }
1879
1880 static int qlcnic_83xx_process_rcv_ring(struct qlcnic_host_sds_ring *sds_ring,
1881 int max)
1882 {
1883 struct qlcnic_host_rds_ring *rds_ring;
1884 struct qlcnic_adapter *adapter = sds_ring->adapter;
1885 struct list_head *cur;
1886 struct status_desc *desc;
1887 struct qlcnic_rx_buffer *rxbuf = NULL;
1888 u8 ring;
1889 u64 sts_data[2];
1890 int count = 0, opcode;
1891 u32 consumer = sds_ring->consumer;
1892
1893 while (count < max) {
1894 desc = &sds_ring->desc_head[consumer];
1895 sts_data[1] = le64_to_cpu(desc->status_desc_data[1]);
1896 opcode = qlcnic_83xx_opcode(sts_data[1]);
1897 if (!opcode)
1898 break;
1899 sts_data[0] = le64_to_cpu(desc->status_desc_data[0]);
1900 ring = QLCNIC_FETCH_RING_ID(sts_data[0]);
1901
1902 switch (opcode) {
1903 case QLC_83XX_REG_DESC:
1904 rxbuf = qlcnic_83xx_process_rcv(adapter, sds_ring,
1905 ring, sts_data);
1906 break;
1907 case QLC_83XX_LRO_DESC:
1908 rxbuf = qlcnic_83xx_process_lro(adapter, ring,
1909 sts_data);
1910 break;
1911 default:
1912 dev_info(&adapter->pdev->dev,
1913 "Unknown opcode: 0x%x\n", opcode);
1914 goto skip;
1915 }
1916
1917 if (likely(rxbuf))
1918 list_add_tail(&rxbuf->list, &sds_ring->free_list[ring]);
1919 else
1920 adapter->stats.null_rxbuf++;
1921 skip:
1922 desc = &sds_ring->desc_head[consumer];
1923 /* Reset the descriptor */
1924 desc->status_desc_data[1] = 0;
1925 consumer = get_next_index(consumer, sds_ring->num_desc);
1926 count++;
1927 }
1928 for (ring = 0; ring < adapter->max_rds_rings; ring++) {
1929 rds_ring = &adapter->recv_ctx->rds_rings[ring];
1930 if (!list_empty(&sds_ring->free_list[ring])) {
1931 list_for_each(cur, &sds_ring->free_list[ring]) {
1932 rxbuf = list_entry(cur, struct qlcnic_rx_buffer,
1933 list);
1934 qlcnic_alloc_rx_skb(adapter, rds_ring, rxbuf);
1935 }
1936 spin_lock(&rds_ring->lock);
1937 list_splice_tail_init(&sds_ring->free_list[ring],
1938 &rds_ring->free_list);
1939 spin_unlock(&rds_ring->lock);
1940 }
1941 qlcnic_post_rx_buffers_nodb(adapter, rds_ring, ring);
1942 }
1943 if (count) {
1944 sds_ring->consumer = consumer;
1945 writel(consumer, sds_ring->crb_sts_consumer);
1946 }
1947 return count;
1948 }
1949
1950 static int qlcnic_83xx_msix_sriov_vf_poll(struct napi_struct *napi, int budget)
1951 {
1952 int tx_complete;
1953 int work_done;
1954 struct qlcnic_host_sds_ring *sds_ring;
1955 struct qlcnic_adapter *adapter;
1956 struct qlcnic_host_tx_ring *tx_ring;
1957
1958 sds_ring = container_of(napi, struct qlcnic_host_sds_ring, napi);
1959 adapter = sds_ring->adapter;
1960 /* tx ring count = 1 */
1961 tx_ring = adapter->tx_ring;
1962
1963 tx_complete = qlcnic_process_cmd_ring(adapter, tx_ring, budget);
1964 work_done = qlcnic_83xx_process_rcv_ring(sds_ring, budget);
1965
1966 /* Check if we need a repoll */
1967 if (!tx_complete)
1968 work_done = budget;
1969
1970 if (work_done < budget) {
1971 napi_complete_done(&sds_ring->napi, work_done);
1972 qlcnic_enable_sds_intr(adapter, sds_ring);
1973 }
1974
1975 return work_done;
1976 }
1977
1978 static int qlcnic_83xx_poll(struct napi_struct *napi, int budget)
1979 {
1980 int tx_complete;
1981 int work_done;
1982 struct qlcnic_host_sds_ring *sds_ring;
1983 struct qlcnic_adapter *adapter;
1984 struct qlcnic_host_tx_ring *tx_ring;
1985
1986 sds_ring = container_of(napi, struct qlcnic_host_sds_ring, napi);
1987 adapter = sds_ring->adapter;
1988 /* tx ring count = 1 */
1989 tx_ring = adapter->tx_ring;
1990
1991 tx_complete = qlcnic_process_cmd_ring(adapter, tx_ring, budget);
1992 work_done = qlcnic_83xx_process_rcv_ring(sds_ring, budget);
1993
1994 /* Check if we need a repoll */
1995 if (!tx_complete)
1996 work_done = budget;
1997
1998 if (work_done < budget) {
1999 napi_complete_done(&sds_ring->napi, work_done);
2000 qlcnic_enable_sds_intr(adapter, sds_ring);
2001 }
2002
2003 return work_done;
2004 }
2005
2006 static int qlcnic_83xx_msix_tx_poll(struct napi_struct *napi, int budget)
2007 {
2008 int work_done;
2009 struct qlcnic_host_tx_ring *tx_ring;
2010 struct qlcnic_adapter *adapter;
2011
2012 tx_ring = container_of(napi, struct qlcnic_host_tx_ring, napi);
2013 adapter = tx_ring->adapter;
2014 work_done = qlcnic_process_cmd_ring(adapter, tx_ring, budget);
2015 if (work_done) {
2016 napi_complete(&tx_ring->napi);
2017 if (test_bit(__QLCNIC_DEV_UP , &adapter->state))
2018 qlcnic_enable_tx_intr(adapter, tx_ring);
2019 } else {
2020 /* 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_done(&sds_ring->napi, work_done);
2038 if (test_bit(__QLCNIC_DEV_UP, &adapter->state))
2039 qlcnic_enable_sds_intr(adapter, sds_ring);
2040 }
2041
2042 return work_done;
2043 }
2044
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 with added FPC-III support