1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * QLogic qlcnic NIC Driver
4 * Copyright (c) 2009-2013 QLogic Corporation
5 */
6
7 #include <linux/netdevice.h>
8 #include <linux/if_vlan.h>
9 #include <net/ip.h>
10 #include <linux/ipv6.h>
11 #include <net/checksum.h>
12 #include <linux/printk.h>
13 #include <linux/jiffies.h>
14
15 #include "qlcnic.h"
16
17 #define QLCNIC_TX_ETHER_PKT 0x01
18 #define QLCNIC_TX_TCP_PKT 0x02
19 #define QLCNIC_TX_UDP_PKT 0x03
20 #define QLCNIC_TX_IP_PKT 0x04
21 #define QLCNIC_TX_TCP_LSO 0x05
22 #define QLCNIC_TX_TCP_LSO6 0x06
23 #define QLCNIC_TX_ENCAP_PKT 0x07
24 #define QLCNIC_TX_ENCAP_LSO 0x08
25 #define QLCNIC_TX_TCPV6_PKT 0x0b
26 #define QLCNIC_TX_UDPV6_PKT 0x0c
27
28 #define QLCNIC_FLAGS_VLAN_TAGGED 0x10
29 #define QLCNIC_FLAGS_VLAN_OOB 0x40
30
31 #define qlcnic_set_tx_vlan_tci(cmd_desc, v) \
32 (cmd_desc)->vlan_TCI = cpu_to_le16(v);
33 #define qlcnic_set_cmd_desc_port(cmd_desc, var) \
34 ((cmd_desc)->port_ctxid |= ((var) & 0x0F))
35 #define qlcnic_set_cmd_desc_ctxid(cmd_desc, var) \
36 ((cmd_desc)->port_ctxid |= ((var) << 4 & 0xF0))
37
38 #define qlcnic_set_tx_port(_desc, _port) \
39 ((_desc)->port_ctxid = ((_port) & 0xf) | (((_port) << 4) & 0xf0))
40
41 #define qlcnic_set_tx_flags_opcode(_desc, _flags, _opcode) \
42 ((_desc)->flags_opcode |= \
43 cpu_to_le16(((_flags) & 0x7f) | (((_opcode) & 0x3f) << 7)))
44
45 #define qlcnic_set_tx_frags_len(_desc, _frags, _len) \
46 ((_desc)->nfrags__length = \
47 cpu_to_le32(((_frags) & 0xff) | (((_len) & 0xffffff) << 8)))
48
49 /* owner bits of status_desc */
50 #define STATUS_OWNER_HOST (0x1ULL << 56)
51 #define STATUS_OWNER_PHANTOM (0x2ULL << 56)
52
53 /* Status descriptor:
54 0-3 port, 4-7 status, 8-11 type, 12-27 total_length
55 28-43 reference_handle, 44-47 protocol, 48-52 pkt_offset
56 53-55 desc_cnt, 56-57 owner, 58-63 opcode
57 */
58 #define qlcnic_get_sts_port(sts_data) \
59 ((sts_data) & 0x0F)
60 #define qlcnic_get_sts_status(sts_data) \
61 (((sts_data) >> 4) & 0x0F)
62 #define qlcnic_get_sts_type(sts_data) \
63 (((sts_data) >> 8) & 0x0F)
64 #define qlcnic_get_sts_totallength(sts_data) \
65 (((sts_data) >> 12) & 0xFFFF)
66 #define qlcnic_get_sts_refhandle(sts_data) \
67 (((sts_data) >> 28) & 0xFFFF)
68 #define qlcnic_get_sts_prot(sts_data) \
69 (((sts_data) >> 44) & 0x0F)
70 #define qlcnic_get_sts_pkt_offset(sts_data) \
71 (((sts_data) >> 48) & 0x1F)
72 #define qlcnic_get_sts_desc_cnt(sts_data) \
73 (((sts_data) >> 53) & 0x7)
74 #define qlcnic_get_sts_opcode(sts_data) \
75 (((sts_data) >> 58) & 0x03F)
76
77 #define qlcnic_get_lro_sts_refhandle(sts_data) \
78 ((sts_data) & 0x07FFF)
79 #define qlcnic_get_lro_sts_length(sts_data) \
80 (((sts_data) >> 16) & 0x0FFFF)
81 #define qlcnic_get_lro_sts_l2_hdr_offset(sts_data) \
82 (((sts_data) >> 32) & 0x0FF)
83 #define qlcnic_get_lro_sts_l4_hdr_offset(sts_data) \
84 (((sts_data) >> 40) & 0x0FF)
85 #define qlcnic_get_lro_sts_timestamp(sts_data) \
86 (((sts_data) >> 48) & 0x1)
87 #define qlcnic_get_lro_sts_type(sts_data) \
88 (((sts_data) >> 49) & 0x7)
89 #define qlcnic_get_lro_sts_push_flag(sts_data) \
90 (((sts_data) >> 52) & 0x1)
91 #define qlcnic_get_lro_sts_seq_number(sts_data) \
92 ((sts_data) & 0x0FFFFFFFF)
93 #define qlcnic_get_lro_sts_mss(sts_data1) \
94 ((sts_data1 >> 32) & 0x0FFFF)
95
96 #define qlcnic_83xx_get_lro_sts_mss(sts) ((sts) & 0xffff)
97
98 /* opcode field in status_desc */
99 #define QLCNIC_SYN_OFFLOAD 0x03
100 #define QLCNIC_RXPKT_DESC 0x04
101 #define QLCNIC_OLD_RXPKT_DESC 0x3f
102 #define QLCNIC_RESPONSE_DESC 0x05
103 #define QLCNIC_LRO_DESC 0x12
104
105 #define QLCNIC_TCP_HDR_SIZE 20
106 #define QLCNIC_TCP_TS_OPTION_SIZE 12
107 #define QLCNIC_FETCH_RING_ID(handle) ((handle) >> 63)
108 #define QLCNIC_DESC_OWNER_FW cpu_to_le64(STATUS_OWNER_PHANTOM)
109
110 #define QLCNIC_TCP_TS_HDR_SIZE (QLCNIC_TCP_HDR_SIZE + QLCNIC_TCP_TS_OPTION_SIZE)
111
112 /* for status field in status_desc */
113 #define STATUS_CKSUM_LOOP 0
114 #define STATUS_CKSUM_OK 2
115
116 #define qlcnic_83xx_pktln(sts) ((sts >> 32) & 0x3FFF)
117 #define qlcnic_83xx_hndl(sts) ((sts >> 48) & 0x7FFF)
118 #define qlcnic_83xx_csum_status(sts) ((sts >> 39) & 7)
119 #define qlcnic_83xx_opcode(sts) ((sts >> 42) & 0xF)
120 #define qlcnic_83xx_vlan_tag(sts) (((sts) >> 48) & 0xFFFF)
121 #define qlcnic_83xx_lro_pktln(sts) (((sts) >> 32) & 0x3FFF)
122 #define qlcnic_83xx_l2_hdr_off(sts) (((sts) >> 16) & 0xFF)
123 #define qlcnic_83xx_l4_hdr_off(sts) (((sts) >> 24) & 0xFF)
124 #define qlcnic_83xx_pkt_cnt(sts) (((sts) >> 16) & 0x7)
125 #define qlcnic_83xx_is_tstamp(sts) (((sts) >> 40) & 1)
126 #define qlcnic_83xx_is_psh_bit(sts) (((sts) >> 41) & 1)
127 #define qlcnic_83xx_is_ip_align(sts) (((sts) >> 46) & 1)
128 #define qlcnic_83xx_has_vlan_tag(sts) (((sts) >> 47) & 1)
129
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
qlcnic_mac_hash(u64 mac,u16 vlan)137 static inline u8 qlcnic_mac_hash(u64 mac, u16 vlan)
138 {
139 return (u8)((mac & 0xff) ^ ((mac >> 40) & 0xff) ^ (vlan & 0xff));
140 }
141
qlcnic_get_ref_handle(struct qlcnic_adapter * adapter,u16 handle,u8 ring_id)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
qlcnic_82xx_is_lb_pkt(u64 sts_data)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
qlcnic_delete_rx_list_mac(struct qlcnic_adapter * adapter,struct qlcnic_filter * fil,void * addr,u16 vlan_id)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
qlcnic_find_mac_filter(struct hlist_head * head,void * addr,u16 vlan_id)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
qlcnic_add_lb_filter(struct qlcnic_adapter * adapter,struct sk_buff * skb,int loopback_pkt,u16 vlan_id)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
qlcnic_82xx_change_filter(struct qlcnic_adapter * adapter,u64 * uaddr,u16 vlan_id,struct qlcnic_host_tx_ring * tx_ring)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
qlcnic_send_filter(struct qlcnic_adapter * adapter,struct cmd_desc_type0 * first_desc,struct sk_buff * skb,struct qlcnic_host_tx_ring * tx_ring)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 = skb_vlan_eth_hdr(skb);
322 vlan_id = ntohs(vh->h_vlan_TCI);
323 } else if (skb_vlan_tag_present(skb)) {
324 vlan_id = skb_vlan_tag_get(skb);
325 }
326 }
327
328 memcpy(&src_addr, phdr->h_source, ETH_ALEN);
329 hval = qlcnic_mac_hash(src_addr, vlan_id);
330 hindex = hval & (adapter->fhash.fbucket_size - 1);
331 head = &(adapter->fhash.fhead[hindex]);
332
333 hlist_for_each_entry_safe(tmp_fil, n, head, fnode) {
334 if (ether_addr_equal(tmp_fil->faddr, (u8 *)&src_addr) &&
335 tmp_fil->vlan_id == vlan_id) {
336 if (time_is_before_jiffies(QLCNIC_READD_AGE * HZ + tmp_fil->ftime))
337 qlcnic_change_filter(adapter, &src_addr,
338 vlan_id, tx_ring);
339 tmp_fil->ftime = jiffies;
340 return;
341 }
342 }
343
344 if (unlikely(adapter->fhash.fnum >= adapter->fhash.fmax)) {
345 adapter->stats.mac_filter_limit_overrun++;
346 return;
347 }
348
349 fil = kzalloc(sizeof(struct qlcnic_filter), GFP_ATOMIC);
350 if (!fil)
351 return;
352
353 qlcnic_change_filter(adapter, &src_addr, vlan_id, tx_ring);
354 fil->ftime = jiffies;
355 fil->vlan_id = vlan_id;
356 memcpy(fil->faddr, &src_addr, ETH_ALEN);
357 spin_lock(&adapter->mac_learn_lock);
358 hlist_add_head(&(fil->fnode), head);
359 adapter->fhash.fnum++;
360 spin_unlock(&adapter->mac_learn_lock);
361 }
362
363 #define QLCNIC_ENCAP_VXLAN_PKT BIT_0
364 #define QLCNIC_ENCAP_OUTER_L3_IP6 BIT_1
365 #define QLCNIC_ENCAP_INNER_L3_IP6 BIT_2
366 #define QLCNIC_ENCAP_INNER_L4_UDP BIT_3
367 #define QLCNIC_ENCAP_DO_L3_CSUM BIT_4
368 #define QLCNIC_ENCAP_DO_L4_CSUM BIT_5
369
qlcnic_tx_encap_pkt(struct qlcnic_adapter * adapter,struct cmd_desc_type0 * first_desc,struct sk_buff * skb,struct qlcnic_host_tx_ring * tx_ring)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_offset(skb);
450 first_desc->ip_hdr_offset = skb_inner_network_offset(skb);
451
452 qlcnic_set_tx_flags_opcode(first_desc, flags, opcode);
453
454 return 0;
455 }
456
qlcnic_tx_pkt(struct qlcnic_adapter * adapter,struct cmd_desc_type0 * first_desc,struct sk_buff * skb,struct qlcnic_host_tx_ring * tx_ring)457 static int qlcnic_tx_pkt(struct qlcnic_adapter *adapter,
458 struct cmd_desc_type0 *first_desc, struct sk_buff *skb,
459 struct qlcnic_host_tx_ring *tx_ring)
460 {
461 u8 l4proto, opcode = 0, hdr_len = 0, tag_vlan = 0;
462 u16 flags = 0, vlan_tci = 0;
463 int copied, offset, copy_len, size;
464 struct cmd_desc_type0 *hwdesc;
465 struct vlan_ethhdr *vh;
466 u16 protocol = ntohs(skb->protocol);
467 u32 producer = tx_ring->producer;
468
469 if (protocol == ETH_P_8021Q) {
470 vh = skb_vlan_eth_hdr(skb);
471 flags = QLCNIC_FLAGS_VLAN_TAGGED;
472 vlan_tci = ntohs(vh->h_vlan_TCI);
473 protocol = ntohs(vh->h_vlan_encapsulated_proto);
474 tag_vlan = 1;
475 } else if (skb_vlan_tag_present(skb)) {
476 flags = QLCNIC_FLAGS_VLAN_OOB;
477 vlan_tci = skb_vlan_tag_get(skb);
478 tag_vlan = 1;
479 }
480 if (unlikely(adapter->tx_pvid)) {
481 if (tag_vlan && !(adapter->flags & QLCNIC_TAGGING_ENABLED))
482 return -EIO;
483 if (tag_vlan && (adapter->flags & QLCNIC_TAGGING_ENABLED))
484 goto set_flags;
485
486 flags = QLCNIC_FLAGS_VLAN_OOB;
487 vlan_tci = adapter->tx_pvid;
488 }
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_tcp_all_headers(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
qlcnic_map_tx_skb(struct pci_dev * pdev,struct sk_buff * skb,struct qlcnic_cmd_buffer * pbuf)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 skb_frag_t *frag;
584 int i, nr_frags;
585 dma_addr_t map;
586
587 nr_frags = skb_shinfo(skb)->nr_frags;
588 nf = &pbuf->frag_array[0];
589
590 map = dma_map_single(&pdev->dev, skb->data, skb_headlen(skb),
591 DMA_TO_DEVICE);
592 if (dma_mapping_error(&pdev->dev, map))
593 goto out_err;
594
595 nf->dma = map;
596 nf->length = skb_headlen(skb);
597
598 for (i = 0; i < nr_frags; i++) {
599 frag = &skb_shinfo(skb)->frags[i];
600 nf = &pbuf->frag_array[i+1];
601 map = skb_frag_dma_map(&pdev->dev, frag, 0, skb_frag_size(frag),
602 DMA_TO_DEVICE);
603 if (dma_mapping_error(&pdev->dev, map))
604 goto unwind;
605
606 nf->dma = map;
607 nf->length = skb_frag_size(frag);
608 }
609
610 return 0;
611
612 unwind:
613 while (--i >= 0) {
614 nf = &pbuf->frag_array[i+1];
615 dma_unmap_page(&pdev->dev, nf->dma, nf->length, DMA_TO_DEVICE);
616 }
617
618 nf = &pbuf->frag_array[0];
619 dma_unmap_single(&pdev->dev, nf->dma, skb_headlen(skb), DMA_TO_DEVICE);
620
621 out_err:
622 return -ENOMEM;
623 }
624
qlcnic_unmap_buffers(struct pci_dev * pdev,struct sk_buff * skb,struct qlcnic_cmd_buffer * pbuf)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 dma_unmap_page(&pdev->dev, nf->dma, nf->length, DMA_TO_DEVICE);
634 }
635
636 nf = &pbuf->frag_array[0];
637 dma_unmap_single(&pdev->dev, nf->dma, skb_headlen(skb), DMA_TO_DEVICE);
638 pbuf->skb = NULL;
639 }
640
qlcnic_clear_cmddesc(u64 * desc)641 static inline void qlcnic_clear_cmddesc(u64 *desc)
642 {
643 desc[0] = 0ULL;
644 desc[2] = 0ULL;
645 desc[7] = 0ULL;
646 }
647
qlcnic_xmit_frame(struct sk_buff * skb,struct net_device * netdev)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, tx_ring);
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
qlcnic_advert_link_change(struct qlcnic_adapter * adapter,int linkup)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
qlcnic_alloc_rx_skb(struct qlcnic_adapter * adapter,struct qlcnic_host_rds_ring * rds_ring,struct qlcnic_rx_buffer * buffer)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 = dma_map_single(&pdev->dev, skb->data, rds_ring->dma_size,
829 DMA_FROM_DEVICE);
830
831 if (dma_mapping_error(&pdev->dev, dma)) {
832 adapter->stats.rx_dma_map_error++;
833 dev_kfree_skb_any(skb);
834 return -ENOMEM;
835 }
836
837 buffer->skb = skb;
838 buffer->dma = dma;
839
840 return 0;
841 }
842
qlcnic_post_rx_buffers_nodb(struct qlcnic_adapter * adapter,struct qlcnic_host_rds_ring * rds_ring,u8 ring_id)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
qlcnic_process_cmd_ring(struct qlcnic_adapter * adapter,struct qlcnic_host_tx_ring * tx_ring,int budget)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 dma_unmap_single(&pdev->dev, frag->dma, frag->length,
907 DMA_TO_DEVICE);
908 frag->dma = 0ULL;
909 for (i = 1; i < buffer->frag_count; i++) {
910 frag++;
911 dma_unmap_page(&pdev->dev, frag->dma,
912 frag->length, DMA_TO_DEVICE);
913 frag->dma = 0ULL;
914 }
915 tx_ring->tx_stats.xmit_finished++;
916 dev_kfree_skb_any(buffer->skb);
917 buffer->skb = NULL;
918 }
919
920 sw_consumer = get_next_index(sw_consumer, tx_ring->num_desc);
921 if (++count >= budget)
922 break;
923 }
924
925 tx_ring->sw_consumer = sw_consumer;
926
927 if (count && netif_running(netdev)) {
928 smp_mb();
929 if (netif_tx_queue_stopped(tx_ring->txq) &&
930 netif_carrier_ok(netdev)) {
931 if (qlcnic_tx_avail(tx_ring) > TX_STOP_THRESH) {
932 netif_tx_wake_queue(tx_ring->txq);
933 tx_ring->tx_stats.xmit_on++;
934 }
935 }
936 adapter->tx_timeo_cnt = 0;
937 }
938 /*
939 * 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
qlcnic_poll(struct napi_struct * napi,int budget)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_done(&sds_ring->napi, work_done);
980 if (test_bit(__QLCNIC_DEV_UP, &adapter->state)) {
981 qlcnic_enable_sds_intr(adapter, sds_ring);
982 qlcnic_enable_tx_intr(adapter, tx_ring);
983 }
984 }
985
986 return work_done;
987 }
988
qlcnic_tx_poll(struct napi_struct * napi,int budget)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
qlcnic_rx_poll(struct napi_struct * napi,int budget)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_done(&sds_ring->napi, work_done);
1024 if (test_bit(__QLCNIC_DEV_UP, &adapter->state))
1025 qlcnic_enable_sds_intr(adapter, sds_ring);
1026 }
1027
1028 return work_done;
1029 }
1030
qlcnic_handle_linkevent(struct qlcnic_adapter * adapter,struct qlcnic_fw_msg * msg)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
qlcnic_handle_fw_message(int desc_cnt,int index,struct qlcnic_host_sds_ring * sds_ring)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
qlcnic_process_rxbuf(struct qlcnic_adapter * adapter,struct qlcnic_host_rds_ring * ring,u16 index,u16 cksum)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 dma_unmap_single(&adapter->pdev->dev, buffer->dma, ring->dma_size,
1151 DMA_FROM_DEVICE);
1152
1153 skb = buffer->skb;
1154 if (likely((adapter->netdev->features & NETIF_F_RXCSUM) &&
1155 (cksum == STATUS_CKSUM_OK || cksum == STATUS_CKSUM_LOOP))) {
1156 adapter->stats.csummed++;
1157 skb->ip_summed = CHECKSUM_UNNECESSARY;
1158 } else {
1159 skb_checksum_none_assert(skb);
1160 }
1161
1162
1163 buffer->skb = NULL;
1164
1165 return skb;
1166 }
1167
qlcnic_check_rx_tagging(struct qlcnic_adapter * adapter,struct sk_buff * skb,u16 * vlan_tag)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 *
qlcnic_process_rcv(struct qlcnic_adapter * adapter,struct qlcnic_host_sds_ring * sds_ring,int ring,u64 sts_data0)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 *
qlcnic_process_lro(struct qlcnic_adapter * adapter,int ring,u64 sts_data0,u64 sts_data1)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
qlcnic_process_rcv_ring(struct qlcnic_host_sds_ring * sds_ring,int max)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 goto skip;
1394 default:
1395 goto skip;
1396 }
1397 WARN_ON(desc_cnt > 1);
1398
1399 if (likely(rxbuf))
1400 list_add_tail(&rxbuf->list, &sds_ring->free_list[ring]);
1401 else
1402 adapter->stats.null_rxbuf++;
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
qlcnic_post_rx_buffers(struct qlcnic_adapter * adapter,struct qlcnic_host_rds_ring * rds_ring,u8 ring_id)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
dump_skb(struct sk_buff * skb,struct qlcnic_adapter * adapter)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
qlcnic_process_rcv_diag(struct qlcnic_adapter * adapter,int ring,u64 sts_data0)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
qlcnic_82xx_process_rcv_ring_diag(struct qlcnic_host_sds_ring * sds_ring)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
qlcnic_82xx_napi_add(struct qlcnic_adapter * adapter,struct net_device * netdev)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,
1589 qlcnic_rx_poll);
1590 } else {
1591 if (ring == (adapter->drv_sds_rings - 1))
1592 netif_napi_add(netdev, &sds_ring->napi,
1593 qlcnic_poll);
1594 else
1595 netif_napi_add(netdev, &sds_ring->napi,
1596 qlcnic_rx_poll);
1597 }
1598 }
1599
1600 if (qlcnic_alloc_tx_rings(adapter, netdev)) {
1601 qlcnic_free_sds_rings(recv_ctx);
1602 return -ENOMEM;
1603 }
1604
1605 if (qlcnic_check_multi_tx(adapter) && !adapter->ahw->diag_test) {
1606 for (ring = 0; ring < adapter->drv_tx_rings; ring++) {
1607 tx_ring = &adapter->tx_ring[ring];
1608 netif_napi_add_tx(netdev, &tx_ring->napi,
1609 qlcnic_tx_poll);
1610 }
1611 }
1612
1613 return 0;
1614 }
1615
qlcnic_82xx_napi_del(struct qlcnic_adapter * adapter)1616 void qlcnic_82xx_napi_del(struct qlcnic_adapter *adapter)
1617 {
1618 int ring;
1619 struct qlcnic_host_sds_ring *sds_ring;
1620 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1621 struct qlcnic_host_tx_ring *tx_ring;
1622
1623 for (ring = 0; ring < adapter->drv_sds_rings; ring++) {
1624 sds_ring = &recv_ctx->sds_rings[ring];
1625 netif_napi_del(&sds_ring->napi);
1626 }
1627
1628 qlcnic_free_sds_rings(adapter->recv_ctx);
1629
1630 if (qlcnic_check_multi_tx(adapter) && !adapter->ahw->diag_test) {
1631 for (ring = 0; ring < adapter->drv_tx_rings; ring++) {
1632 tx_ring = &adapter->tx_ring[ring];
1633 netif_napi_del(&tx_ring->napi);
1634 }
1635 }
1636
1637 qlcnic_free_tx_rings(adapter);
1638 }
1639
qlcnic_82xx_napi_enable(struct qlcnic_adapter * adapter)1640 void qlcnic_82xx_napi_enable(struct qlcnic_adapter *adapter)
1641 {
1642 int ring;
1643 struct qlcnic_host_sds_ring *sds_ring;
1644 struct qlcnic_host_tx_ring *tx_ring;
1645 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1646
1647 if (adapter->is_up != QLCNIC_ADAPTER_UP_MAGIC)
1648 return;
1649
1650 for (ring = 0; ring < adapter->drv_sds_rings; ring++) {
1651 sds_ring = &recv_ctx->sds_rings[ring];
1652 napi_enable(&sds_ring->napi);
1653 qlcnic_enable_sds_intr(adapter, sds_ring);
1654 }
1655
1656 if (qlcnic_check_multi_tx(adapter) &&
1657 (adapter->flags & QLCNIC_MSIX_ENABLED) &&
1658 !adapter->ahw->diag_test) {
1659 for (ring = 0; ring < adapter->drv_tx_rings; ring++) {
1660 tx_ring = &adapter->tx_ring[ring];
1661 napi_enable(&tx_ring->napi);
1662 qlcnic_enable_tx_intr(adapter, tx_ring);
1663 }
1664 }
1665 }
1666
qlcnic_82xx_napi_disable(struct qlcnic_adapter * adapter)1667 void qlcnic_82xx_napi_disable(struct qlcnic_adapter *adapter)
1668 {
1669 int ring;
1670 struct qlcnic_host_sds_ring *sds_ring;
1671 struct qlcnic_host_tx_ring *tx_ring;
1672 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1673
1674 if (adapter->is_up != QLCNIC_ADAPTER_UP_MAGIC)
1675 return;
1676
1677 for (ring = 0; ring < adapter->drv_sds_rings; ring++) {
1678 sds_ring = &recv_ctx->sds_rings[ring];
1679 qlcnic_disable_sds_intr(adapter, sds_ring);
1680 napi_synchronize(&sds_ring->napi);
1681 napi_disable(&sds_ring->napi);
1682 }
1683
1684 if ((adapter->flags & QLCNIC_MSIX_ENABLED) &&
1685 !adapter->ahw->diag_test &&
1686 qlcnic_check_multi_tx(adapter)) {
1687 for (ring = 0; ring < adapter->drv_tx_rings; ring++) {
1688 tx_ring = &adapter->tx_ring[ring];
1689 qlcnic_disable_tx_intr(adapter, tx_ring);
1690 napi_synchronize(&tx_ring->napi);
1691 napi_disable(&tx_ring->napi);
1692 }
1693 }
1694 }
1695
1696 #define QLC_83XX_NORMAL_LB_PKT (1ULL << 36)
1697 #define QLC_83XX_LRO_LB_PKT (1ULL << 46)
1698
qlcnic_83xx_is_lb_pkt(u64 sts_data,int lro_pkt)1699 static inline int qlcnic_83xx_is_lb_pkt(u64 sts_data, int lro_pkt)
1700 {
1701 if (lro_pkt)
1702 return (sts_data & QLC_83XX_LRO_LB_PKT) ? 1 : 0;
1703 else
1704 return (sts_data & QLC_83XX_NORMAL_LB_PKT) ? 1 : 0;
1705 }
1706
1707 #define QLCNIC_ENCAP_LENGTH_MASK 0x7f
1708
qlcnic_encap_length(u64 sts_data)1709 static inline u8 qlcnic_encap_length(u64 sts_data)
1710 {
1711 return sts_data & QLCNIC_ENCAP_LENGTH_MASK;
1712 }
1713
1714 static struct qlcnic_rx_buffer *
qlcnic_83xx_process_rcv(struct qlcnic_adapter * adapter,struct qlcnic_host_sds_ring * sds_ring,u8 ring,u64 sts_data[])1715 qlcnic_83xx_process_rcv(struct qlcnic_adapter *adapter,
1716 struct qlcnic_host_sds_ring *sds_ring,
1717 u8 ring, u64 sts_data[])
1718 {
1719 struct net_device *netdev = adapter->netdev;
1720 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1721 struct qlcnic_rx_buffer *buffer;
1722 struct sk_buff *skb;
1723 struct qlcnic_host_rds_ring *rds_ring;
1724 int index, length, cksum, is_lb_pkt;
1725 u16 vid = 0xffff;
1726 int err;
1727
1728 if (unlikely(ring >= adapter->max_rds_rings))
1729 return NULL;
1730
1731 rds_ring = &recv_ctx->rds_rings[ring];
1732
1733 index = qlcnic_83xx_hndl(sts_data[0]);
1734 if (unlikely(index >= rds_ring->num_desc))
1735 return NULL;
1736
1737 buffer = &rds_ring->rx_buf_arr[index];
1738 length = qlcnic_83xx_pktln(sts_data[0]);
1739 cksum = qlcnic_83xx_csum_status(sts_data[1]);
1740 skb = qlcnic_process_rxbuf(adapter, rds_ring, index, cksum);
1741 if (!skb)
1742 return buffer;
1743
1744 if (length > rds_ring->skb_size)
1745 skb_put(skb, rds_ring->skb_size);
1746 else
1747 skb_put(skb, length);
1748
1749 err = qlcnic_check_rx_tagging(adapter, skb, &vid);
1750
1751 if (adapter->rx_mac_learn) {
1752 is_lb_pkt = qlcnic_83xx_is_lb_pkt(sts_data[1], 0);
1753 qlcnic_add_lb_filter(adapter, skb, is_lb_pkt, vid);
1754 }
1755
1756 if (unlikely(err)) {
1757 adapter->stats.rxdropped++;
1758 dev_kfree_skb(skb);
1759 return buffer;
1760 }
1761
1762 skb->protocol = eth_type_trans(skb, netdev);
1763
1764 if (qlcnic_encap_length(sts_data[1]) &&
1765 skb->ip_summed == CHECKSUM_UNNECESSARY) {
1766 skb->csum_level = 1;
1767 adapter->stats.encap_rx_csummed++;
1768 }
1769
1770 if (vid != 0xffff)
1771 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid);
1772
1773 napi_gro_receive(&sds_ring->napi, skb);
1774
1775 adapter->stats.rx_pkts++;
1776 adapter->stats.rxbytes += length;
1777
1778 return buffer;
1779 }
1780
1781 static struct qlcnic_rx_buffer *
qlcnic_83xx_process_lro(struct qlcnic_adapter * adapter,u8 ring,u64 sts_data[])1782 qlcnic_83xx_process_lro(struct qlcnic_adapter *adapter,
1783 u8 ring, u64 sts_data[])
1784 {
1785 struct net_device *netdev = adapter->netdev;
1786 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1787 struct qlcnic_rx_buffer *buffer;
1788 struct sk_buff *skb;
1789 struct qlcnic_host_rds_ring *rds_ring;
1790 struct iphdr *iph;
1791 struct ipv6hdr *ipv6h;
1792 struct tcphdr *th;
1793 bool push;
1794 int l2_hdr_offset, l4_hdr_offset;
1795 int index, is_lb_pkt;
1796 u16 lro_length, length, data_offset, gso_size;
1797 u16 vid = 0xffff;
1798 int err;
1799
1800 if (unlikely(ring >= adapter->max_rds_rings))
1801 return NULL;
1802
1803 rds_ring = &recv_ctx->rds_rings[ring];
1804
1805 index = qlcnic_83xx_hndl(sts_data[0]);
1806 if (unlikely(index >= rds_ring->num_desc))
1807 return NULL;
1808
1809 buffer = &rds_ring->rx_buf_arr[index];
1810
1811 lro_length = qlcnic_83xx_lro_pktln(sts_data[0]);
1812 l2_hdr_offset = qlcnic_83xx_l2_hdr_off(sts_data[1]);
1813 l4_hdr_offset = qlcnic_83xx_l4_hdr_off(sts_data[1]);
1814 push = qlcnic_83xx_is_psh_bit(sts_data[1]);
1815
1816 skb = qlcnic_process_rxbuf(adapter, rds_ring, index, STATUS_CKSUM_OK);
1817 if (!skb)
1818 return buffer;
1819
1820 if (qlcnic_83xx_is_tstamp(sts_data[1]))
1821 data_offset = l4_hdr_offset + QLCNIC_TCP_TS_HDR_SIZE;
1822 else
1823 data_offset = l4_hdr_offset + QLCNIC_TCP_HDR_SIZE;
1824
1825 skb_put(skb, lro_length + data_offset);
1826 skb_pull(skb, l2_hdr_offset);
1827
1828 err = qlcnic_check_rx_tagging(adapter, skb, &vid);
1829
1830 if (adapter->rx_mac_learn) {
1831 is_lb_pkt = qlcnic_83xx_is_lb_pkt(sts_data[1], 1);
1832 qlcnic_add_lb_filter(adapter, skb, is_lb_pkt, vid);
1833 }
1834
1835 if (unlikely(err)) {
1836 adapter->stats.rxdropped++;
1837 dev_kfree_skb(skb);
1838 return buffer;
1839 }
1840
1841 skb->protocol = eth_type_trans(skb, netdev);
1842 if (ntohs(skb->protocol) == ETH_P_IPV6) {
1843 ipv6h = (struct ipv6hdr *)skb->data;
1844 th = (struct tcphdr *)(skb->data + sizeof(struct ipv6hdr));
1845
1846 length = (th->doff << 2) + lro_length;
1847 ipv6h->payload_len = htons(length);
1848 } else {
1849 iph = (struct iphdr *)skb->data;
1850 th = (struct tcphdr *)(skb->data + (iph->ihl << 2));
1851 length = (iph->ihl << 2) + (th->doff << 2) + lro_length;
1852 csum_replace2(&iph->check, iph->tot_len, htons(length));
1853 iph->tot_len = htons(length);
1854 }
1855
1856 th->psh = push;
1857 length = skb->len;
1858
1859 if (adapter->flags & QLCNIC_FW_LRO_MSS_CAP) {
1860 gso_size = qlcnic_83xx_get_lro_sts_mss(sts_data[0]);
1861 skb_shinfo(skb)->gso_size = gso_size;
1862 if (skb->protocol == htons(ETH_P_IPV6))
1863 skb_shinfo(skb)->gso_type = SKB_GSO_TCPV6;
1864 else
1865 skb_shinfo(skb)->gso_type = SKB_GSO_TCPV4;
1866 }
1867
1868 if (vid != 0xffff)
1869 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid);
1870
1871 netif_receive_skb(skb);
1872
1873 adapter->stats.lro_pkts++;
1874 adapter->stats.lrobytes += length;
1875 return buffer;
1876 }
1877
qlcnic_83xx_process_rcv_ring(struct qlcnic_host_sds_ring * sds_ring,int max)1878 static int qlcnic_83xx_process_rcv_ring(struct qlcnic_host_sds_ring *sds_ring,
1879 int max)
1880 {
1881 struct qlcnic_host_rds_ring *rds_ring;
1882 struct qlcnic_adapter *adapter = sds_ring->adapter;
1883 struct list_head *cur;
1884 struct status_desc *desc;
1885 struct qlcnic_rx_buffer *rxbuf = NULL;
1886 u8 ring;
1887 u64 sts_data[2];
1888 int count = 0, opcode;
1889 u32 consumer = sds_ring->consumer;
1890
1891 while (count < max) {
1892 desc = &sds_ring->desc_head[consumer];
1893 sts_data[1] = le64_to_cpu(desc->status_desc_data[1]);
1894 opcode = qlcnic_83xx_opcode(sts_data[1]);
1895 if (!opcode)
1896 break;
1897 sts_data[0] = le64_to_cpu(desc->status_desc_data[0]);
1898 ring = QLCNIC_FETCH_RING_ID(sts_data[0]);
1899
1900 switch (opcode) {
1901 case QLC_83XX_REG_DESC:
1902 rxbuf = qlcnic_83xx_process_rcv(adapter, sds_ring,
1903 ring, sts_data);
1904 break;
1905 case QLC_83XX_LRO_DESC:
1906 rxbuf = qlcnic_83xx_process_lro(adapter, ring,
1907 sts_data);
1908 break;
1909 default:
1910 dev_info(&adapter->pdev->dev,
1911 "Unknown opcode: 0x%x\n", opcode);
1912 goto skip;
1913 }
1914
1915 if (likely(rxbuf))
1916 list_add_tail(&rxbuf->list, &sds_ring->free_list[ring]);
1917 else
1918 adapter->stats.null_rxbuf++;
1919 skip:
1920 desc = &sds_ring->desc_head[consumer];
1921 /* Reset the descriptor */
1922 desc->status_desc_data[1] = 0;
1923 consumer = get_next_index(consumer, sds_ring->num_desc);
1924 count++;
1925 }
1926 for (ring = 0; ring < adapter->max_rds_rings; ring++) {
1927 rds_ring = &adapter->recv_ctx->rds_rings[ring];
1928 if (!list_empty(&sds_ring->free_list[ring])) {
1929 list_for_each(cur, &sds_ring->free_list[ring]) {
1930 rxbuf = list_entry(cur, struct qlcnic_rx_buffer,
1931 list);
1932 qlcnic_alloc_rx_skb(adapter, rds_ring, rxbuf);
1933 }
1934 spin_lock(&rds_ring->lock);
1935 list_splice_tail_init(&sds_ring->free_list[ring],
1936 &rds_ring->free_list);
1937 spin_unlock(&rds_ring->lock);
1938 }
1939 qlcnic_post_rx_buffers_nodb(adapter, rds_ring, ring);
1940 }
1941 if (count) {
1942 sds_ring->consumer = consumer;
1943 writel(consumer, sds_ring->crb_sts_consumer);
1944 }
1945 return count;
1946 }
1947
qlcnic_83xx_msix_sriov_vf_poll(struct napi_struct * napi,int budget)1948 static int qlcnic_83xx_msix_sriov_vf_poll(struct napi_struct *napi, int budget)
1949 {
1950 int tx_complete;
1951 int work_done;
1952 struct qlcnic_host_sds_ring *sds_ring;
1953 struct qlcnic_adapter *adapter;
1954 struct qlcnic_host_tx_ring *tx_ring;
1955
1956 sds_ring = container_of(napi, struct qlcnic_host_sds_ring, napi);
1957 adapter = sds_ring->adapter;
1958 /* tx ring count = 1 */
1959 tx_ring = adapter->tx_ring;
1960
1961 tx_complete = qlcnic_process_cmd_ring(adapter, tx_ring, budget);
1962 work_done = qlcnic_83xx_process_rcv_ring(sds_ring, budget);
1963
1964 /* Check if we need a repoll */
1965 if (!tx_complete)
1966 work_done = budget;
1967
1968 if (work_done < budget) {
1969 napi_complete_done(&sds_ring->napi, work_done);
1970 qlcnic_enable_sds_intr(adapter, sds_ring);
1971 }
1972
1973 return work_done;
1974 }
1975
qlcnic_83xx_poll(struct napi_struct * napi,int budget)1976 static int qlcnic_83xx_poll(struct napi_struct *napi, int budget)
1977 {
1978 int tx_complete;
1979 int work_done;
1980 struct qlcnic_host_sds_ring *sds_ring;
1981 struct qlcnic_adapter *adapter;
1982 struct qlcnic_host_tx_ring *tx_ring;
1983
1984 sds_ring = container_of(napi, struct qlcnic_host_sds_ring, napi);
1985 adapter = sds_ring->adapter;
1986 /* tx ring count = 1 */
1987 tx_ring = adapter->tx_ring;
1988
1989 tx_complete = qlcnic_process_cmd_ring(adapter, tx_ring, budget);
1990 work_done = qlcnic_83xx_process_rcv_ring(sds_ring, budget);
1991
1992 /* Check if we need a repoll */
1993 if (!tx_complete)
1994 work_done = budget;
1995
1996 if (work_done < budget) {
1997 napi_complete_done(&sds_ring->napi, work_done);
1998 qlcnic_enable_sds_intr(adapter, sds_ring);
1999 }
2000
2001 return work_done;
2002 }
2003
qlcnic_83xx_msix_tx_poll(struct napi_struct * napi,int budget)2004 static int qlcnic_83xx_msix_tx_poll(struct napi_struct *napi, int budget)
2005 {
2006 int work_done;
2007 struct qlcnic_host_tx_ring *tx_ring;
2008 struct qlcnic_adapter *adapter;
2009
2010 tx_ring = container_of(napi, struct qlcnic_host_tx_ring, napi);
2011 adapter = tx_ring->adapter;
2012 work_done = qlcnic_process_cmd_ring(adapter, tx_ring, budget);
2013 if (work_done) {
2014 napi_complete(&tx_ring->napi);
2015 if (test_bit(__QLCNIC_DEV_UP , &adapter->state))
2016 qlcnic_enable_tx_intr(adapter, tx_ring);
2017 } else {
2018 /* need a repoll */
2019 work_done = budget;
2020 }
2021
2022 return work_done;
2023 }
2024
qlcnic_83xx_rx_poll(struct napi_struct * napi,int budget)2025 static int qlcnic_83xx_rx_poll(struct napi_struct *napi, int budget)
2026 {
2027 int work_done;
2028 struct qlcnic_host_sds_ring *sds_ring;
2029 struct qlcnic_adapter *adapter;
2030
2031 sds_ring = container_of(napi, struct qlcnic_host_sds_ring, napi);
2032 adapter = sds_ring->adapter;
2033 work_done = qlcnic_83xx_process_rcv_ring(sds_ring, budget);
2034 if (work_done < budget) {
2035 napi_complete_done(&sds_ring->napi, work_done);
2036 if (test_bit(__QLCNIC_DEV_UP, &adapter->state))
2037 qlcnic_enable_sds_intr(adapter, sds_ring);
2038 }
2039
2040 return work_done;
2041 }
2042
qlcnic_83xx_napi_enable(struct qlcnic_adapter * adapter)2043 void qlcnic_83xx_napi_enable(struct qlcnic_adapter *adapter)
2044 {
2045 int ring;
2046 struct qlcnic_host_sds_ring *sds_ring;
2047 struct qlcnic_host_tx_ring *tx_ring;
2048 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
2049
2050 if (adapter->is_up != QLCNIC_ADAPTER_UP_MAGIC)
2051 return;
2052
2053 for (ring = 0; ring < adapter->drv_sds_rings; ring++) {
2054 sds_ring = &recv_ctx->sds_rings[ring];
2055 napi_enable(&sds_ring->napi);
2056 if (adapter->flags & QLCNIC_MSIX_ENABLED)
2057 qlcnic_enable_sds_intr(adapter, sds_ring);
2058 }
2059
2060 if ((adapter->flags & QLCNIC_MSIX_ENABLED) &&
2061 !(adapter->flags & QLCNIC_TX_INTR_SHARED)) {
2062 for (ring = 0; ring < adapter->drv_tx_rings; ring++) {
2063 tx_ring = &adapter->tx_ring[ring];
2064 napi_enable(&tx_ring->napi);
2065 qlcnic_enable_tx_intr(adapter, tx_ring);
2066 }
2067 }
2068 }
2069
qlcnic_83xx_napi_disable(struct qlcnic_adapter * adapter)2070 void qlcnic_83xx_napi_disable(struct qlcnic_adapter *adapter)
2071 {
2072 int ring;
2073 struct qlcnic_host_sds_ring *sds_ring;
2074 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
2075 struct qlcnic_host_tx_ring *tx_ring;
2076
2077 if (adapter->is_up != QLCNIC_ADAPTER_UP_MAGIC)
2078 return;
2079
2080 for (ring = 0; ring < adapter->drv_sds_rings; ring++) {
2081 sds_ring = &recv_ctx->sds_rings[ring];
2082 if (adapter->flags & QLCNIC_MSIX_ENABLED)
2083 qlcnic_disable_sds_intr(adapter, sds_ring);
2084 napi_synchronize(&sds_ring->napi);
2085 napi_disable(&sds_ring->napi);
2086 }
2087
2088 if ((adapter->flags & QLCNIC_MSIX_ENABLED) &&
2089 !(adapter->flags & QLCNIC_TX_INTR_SHARED)) {
2090 for (ring = 0; ring < adapter->drv_tx_rings; ring++) {
2091 tx_ring = &adapter->tx_ring[ring];
2092 qlcnic_disable_tx_intr(adapter, tx_ring);
2093 napi_synchronize(&tx_ring->napi);
2094 napi_disable(&tx_ring->napi);
2095 }
2096 }
2097 }
2098
qlcnic_83xx_napi_add(struct qlcnic_adapter * adapter,struct net_device * netdev)2099 int qlcnic_83xx_napi_add(struct qlcnic_adapter *adapter,
2100 struct net_device *netdev)
2101 {
2102 int ring;
2103 struct qlcnic_host_sds_ring *sds_ring;
2104 struct qlcnic_host_tx_ring *tx_ring;
2105 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
2106
2107 if (qlcnic_alloc_sds_rings(recv_ctx, adapter->drv_sds_rings))
2108 return -ENOMEM;
2109
2110 for (ring = 0; ring < adapter->drv_sds_rings; ring++) {
2111 sds_ring = &recv_ctx->sds_rings[ring];
2112 if (adapter->flags & QLCNIC_MSIX_ENABLED) {
2113 if (!(adapter->flags & QLCNIC_TX_INTR_SHARED))
2114 netif_napi_add(netdev, &sds_ring->napi,
2115 qlcnic_83xx_rx_poll);
2116 else
2117 netif_napi_add(netdev, &sds_ring->napi,
2118 qlcnic_83xx_msix_sriov_vf_poll);
2119
2120 } else {
2121 netif_napi_add(netdev, &sds_ring->napi,
2122 qlcnic_83xx_poll);
2123 }
2124 }
2125
2126 if (qlcnic_alloc_tx_rings(adapter, netdev)) {
2127 qlcnic_free_sds_rings(recv_ctx);
2128 return -ENOMEM;
2129 }
2130
2131 if ((adapter->flags & QLCNIC_MSIX_ENABLED) &&
2132 !(adapter->flags & QLCNIC_TX_INTR_SHARED)) {
2133 for (ring = 0; ring < adapter->drv_tx_rings; ring++) {
2134 tx_ring = &adapter->tx_ring[ring];
2135 netif_napi_add_tx(netdev, &tx_ring->napi,
2136 qlcnic_83xx_msix_tx_poll);
2137 }
2138 }
2139
2140 return 0;
2141 }
2142
qlcnic_83xx_napi_del(struct qlcnic_adapter * adapter)2143 void qlcnic_83xx_napi_del(struct qlcnic_adapter *adapter)
2144 {
2145 int ring;
2146 struct qlcnic_host_sds_ring *sds_ring;
2147 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
2148 struct qlcnic_host_tx_ring *tx_ring;
2149
2150 for (ring = 0; ring < adapter->drv_sds_rings; ring++) {
2151 sds_ring = &recv_ctx->sds_rings[ring];
2152 netif_napi_del(&sds_ring->napi);
2153 }
2154
2155 qlcnic_free_sds_rings(adapter->recv_ctx);
2156
2157 if ((adapter->flags & QLCNIC_MSIX_ENABLED) &&
2158 !(adapter->flags & QLCNIC_TX_INTR_SHARED)) {
2159 for (ring = 0; ring < adapter->drv_tx_rings; ring++) {
2160 tx_ring = &adapter->tx_ring[ring];
2161 netif_napi_del(&tx_ring->napi);
2162 }
2163 }
2164
2165 qlcnic_free_tx_rings(adapter);
2166 }
2167
qlcnic_83xx_process_rcv_diag(struct qlcnic_adapter * adapter,int ring,u64 sts_data[])2168 static void qlcnic_83xx_process_rcv_diag(struct qlcnic_adapter *adapter,
2169 int ring, u64 sts_data[])
2170 {
2171 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
2172 struct sk_buff *skb;
2173 struct qlcnic_host_rds_ring *rds_ring;
2174 int index, length;
2175
2176 if (unlikely(ring >= adapter->max_rds_rings))
2177 return;
2178
2179 rds_ring = &recv_ctx->rds_rings[ring];
2180 index = qlcnic_83xx_hndl(sts_data[0]);
2181 if (unlikely(index >= rds_ring->num_desc))
2182 return;
2183
2184 length = qlcnic_83xx_pktln(sts_data[0]);
2185
2186 skb = qlcnic_process_rxbuf(adapter, rds_ring, index, STATUS_CKSUM_OK);
2187 if (!skb)
2188 return;
2189
2190 if (length > rds_ring->skb_size)
2191 skb_put(skb, rds_ring->skb_size);
2192 else
2193 skb_put(skb, length);
2194
2195 if (!qlcnic_check_loopback_buff(skb->data, adapter->mac_addr))
2196 adapter->ahw->diag_cnt++;
2197 else
2198 dump_skb(skb, adapter);
2199
2200 dev_kfree_skb_any(skb);
2201 return;
2202 }
2203
qlcnic_83xx_process_rcv_ring_diag(struct qlcnic_host_sds_ring * sds_ring)2204 void qlcnic_83xx_process_rcv_ring_diag(struct qlcnic_host_sds_ring *sds_ring)
2205 {
2206 struct qlcnic_adapter *adapter = sds_ring->adapter;
2207 struct status_desc *desc;
2208 u64 sts_data[2];
2209 int ring, opcode;
2210 u32 consumer = sds_ring->consumer;
2211
2212 desc = &sds_ring->desc_head[consumer];
2213 sts_data[0] = le64_to_cpu(desc->status_desc_data[0]);
2214 sts_data[1] = le64_to_cpu(desc->status_desc_data[1]);
2215 opcode = qlcnic_83xx_opcode(sts_data[1]);
2216 if (!opcode)
2217 return;
2218
2219 ring = QLCNIC_FETCH_RING_ID(sts_data[0]);
2220 qlcnic_83xx_process_rcv_diag(adapter, ring, sts_data);
2221 desc = &sds_ring->desc_head[consumer];
2222 desc->status_desc_data[0] = cpu_to_le64(STATUS_OWNER_PHANTOM);
2223 consumer = get_next_index(consumer, sds_ring->num_desc);
2224 sds_ring->consumer = consumer;
2225 writel(consumer, sds_ring->crb_sts_consumer);
2226 }
2227