1 /*
2 * QLogic qlcnic NIC Driver
3 * Copyright (c) 2009-2013 QLogic Corporation
4 *
5 * See LICENSE.qlcnic for copyright and licensing details.
6 */
7
8 #include <linux/netdevice.h>
9 #include <linux/if_vlan.h>
10 #include <net/ip.h>
11 #include <linux/ipv6.h>
12 #include <net/checksum.h>
13 #include <linux/printk.h>
14
15 #include "qlcnic.h"
16
17 #define QLCNIC_TX_ETHER_PKT 0x01
18 #define QLCNIC_TX_TCP_PKT 0x02
19 #define QLCNIC_TX_UDP_PKT 0x03
20 #define QLCNIC_TX_IP_PKT 0x04
21 #define QLCNIC_TX_TCP_LSO 0x05
22 #define QLCNIC_TX_TCP_LSO6 0x06
23 #define QLCNIC_TX_ENCAP_PKT 0x07
24 #define QLCNIC_TX_ENCAP_LSO 0x08
25 #define QLCNIC_TX_TCPV6_PKT 0x0b
26 #define QLCNIC_TX_UDPV6_PKT 0x0c
27
28 #define QLCNIC_FLAGS_VLAN_TAGGED 0x10
29 #define QLCNIC_FLAGS_VLAN_OOB 0x40
30
31 #define qlcnic_set_tx_vlan_tci(cmd_desc, v) \
32 (cmd_desc)->vlan_TCI = cpu_to_le16(v);
33 #define qlcnic_set_cmd_desc_port(cmd_desc, var) \
34 ((cmd_desc)->port_ctxid |= ((var) & 0x0F))
35 #define qlcnic_set_cmd_desc_ctxid(cmd_desc, var) \
36 ((cmd_desc)->port_ctxid |= ((var) << 4 & 0xF0))
37
38 #define qlcnic_set_tx_port(_desc, _port) \
39 ((_desc)->port_ctxid = ((_port) & 0xf) | (((_port) << 4) & 0xf0))
40
41 #define qlcnic_set_tx_flags_opcode(_desc, _flags, _opcode) \
42 ((_desc)->flags_opcode |= \
43 cpu_to_le16(((_flags) & 0x7f) | (((_opcode) & 0x3f) << 7)))
44
45 #define qlcnic_set_tx_frags_len(_desc, _frags, _len) \
46 ((_desc)->nfrags__length = \
47 cpu_to_le32(((_frags) & 0xff) | (((_len) & 0xffffff) << 8)))
48
49 /* owner bits of status_desc */
50 #define STATUS_OWNER_HOST (0x1ULL << 56)
51 #define STATUS_OWNER_PHANTOM (0x2ULL << 56)
52
53 /* Status descriptor:
54 0-3 port, 4-7 status, 8-11 type, 12-27 total_length
55 28-43 reference_handle, 44-47 protocol, 48-52 pkt_offset
56 53-55 desc_cnt, 56-57 owner, 58-63 opcode
57 */
58 #define qlcnic_get_sts_port(sts_data) \
59 ((sts_data) & 0x0F)
60 #define qlcnic_get_sts_status(sts_data) \
61 (((sts_data) >> 4) & 0x0F)
62 #define qlcnic_get_sts_type(sts_data) \
63 (((sts_data) >> 8) & 0x0F)
64 #define qlcnic_get_sts_totallength(sts_data) \
65 (((sts_data) >> 12) & 0xFFFF)
66 #define qlcnic_get_sts_refhandle(sts_data) \
67 (((sts_data) >> 28) & 0xFFFF)
68 #define qlcnic_get_sts_prot(sts_data) \
69 (((sts_data) >> 44) & 0x0F)
70 #define qlcnic_get_sts_pkt_offset(sts_data) \
71 (((sts_data) >> 48) & 0x1F)
72 #define qlcnic_get_sts_desc_cnt(sts_data) \
73 (((sts_data) >> 53) & 0x7)
74 #define qlcnic_get_sts_opcode(sts_data) \
75 (((sts_data) >> 58) & 0x03F)
76
77 #define qlcnic_get_lro_sts_refhandle(sts_data) \
78 ((sts_data) & 0x07FFF)
79 #define qlcnic_get_lro_sts_length(sts_data) \
80 (((sts_data) >> 16) & 0x0FFFF)
81 #define qlcnic_get_lro_sts_l2_hdr_offset(sts_data) \
82 (((sts_data) >> 32) & 0x0FF)
83 #define qlcnic_get_lro_sts_l4_hdr_offset(sts_data) \
84 (((sts_data) >> 40) & 0x0FF)
85 #define qlcnic_get_lro_sts_timestamp(sts_data) \
86 (((sts_data) >> 48) & 0x1)
87 #define qlcnic_get_lro_sts_type(sts_data) \
88 (((sts_data) >> 49) & 0x7)
89 #define qlcnic_get_lro_sts_push_flag(sts_data) \
90 (((sts_data) >> 52) & 0x1)
91 #define qlcnic_get_lro_sts_seq_number(sts_data) \
92 ((sts_data) & 0x0FFFFFFFF)
93 #define qlcnic_get_lro_sts_mss(sts_data1) \
94 ((sts_data1 >> 32) & 0x0FFFF)
95
96 #define qlcnic_83xx_get_lro_sts_mss(sts) ((sts) & 0xffff)
97
98 /* opcode field in status_desc */
99 #define QLCNIC_SYN_OFFLOAD 0x03
100 #define QLCNIC_RXPKT_DESC 0x04
101 #define QLCNIC_OLD_RXPKT_DESC 0x3f
102 #define QLCNIC_RESPONSE_DESC 0x05
103 #define QLCNIC_LRO_DESC 0x12
104
105 #define QLCNIC_TX_POLL_BUDGET 128
106 #define QLCNIC_TCP_HDR_SIZE 20
107 #define QLCNIC_TCP_TS_OPTION_SIZE 12
108 #define QLCNIC_FETCH_RING_ID(handle) ((handle) >> 63)
109 #define QLCNIC_DESC_OWNER_FW cpu_to_le64(STATUS_OWNER_PHANTOM)
110
111 #define QLCNIC_TCP_TS_HDR_SIZE (QLCNIC_TCP_HDR_SIZE + QLCNIC_TCP_TS_OPTION_SIZE)
112
113 /* for status field in status_desc */
114 #define STATUS_CKSUM_LOOP 0
115 #define STATUS_CKSUM_OK 2
116
117 #define qlcnic_83xx_pktln(sts) ((sts >> 32) & 0x3FFF)
118 #define qlcnic_83xx_hndl(sts) ((sts >> 48) & 0x7FFF)
119 #define qlcnic_83xx_csum_status(sts) ((sts >> 39) & 7)
120 #define qlcnic_83xx_opcode(sts) ((sts >> 42) & 0xF)
121 #define qlcnic_83xx_vlan_tag(sts) (((sts) >> 48) & 0xFFFF)
122 #define qlcnic_83xx_lro_pktln(sts) (((sts) >> 32) & 0x3FFF)
123 #define qlcnic_83xx_l2_hdr_off(sts) (((sts) >> 16) & 0xFF)
124 #define qlcnic_83xx_l4_hdr_off(sts) (((sts) >> 24) & 0xFF)
125 #define qlcnic_83xx_pkt_cnt(sts) (((sts) >> 16) & 0x7)
126 #define qlcnic_83xx_is_tstamp(sts) (((sts) >> 40) & 1)
127 #define qlcnic_83xx_is_psh_bit(sts) (((sts) >> 41) & 1)
128 #define qlcnic_83xx_is_ip_align(sts) (((sts) >> 46) & 1)
129 #define qlcnic_83xx_has_vlan_tag(sts) (((sts) >> 47) & 1)
130
131 static int qlcnic_process_rcv_ring(struct qlcnic_host_sds_ring *sds_ring,
132 int max);
133
134 static struct sk_buff *qlcnic_process_rxbuf(struct qlcnic_adapter *,
135 struct qlcnic_host_rds_ring *,
136 u16, u16);
137
qlcnic_mac_hash(u64 mac,u16 vlan)138 static inline u8 qlcnic_mac_hash(u64 mac, u16 vlan)
139 {
140 return (u8)((mac & 0xff) ^ ((mac >> 40) & 0xff) ^ (vlan & 0xff));
141 }
142
qlcnic_get_ref_handle(struct qlcnic_adapter * adapter,u16 handle,u8 ring_id)143 static inline u32 qlcnic_get_ref_handle(struct qlcnic_adapter *adapter,
144 u16 handle, u8 ring_id)
145 {
146 if (qlcnic_83xx_check(adapter))
147 return handle | (ring_id << 15);
148 else
149 return handle;
150 }
151
qlcnic_82xx_is_lb_pkt(u64 sts_data)152 static inline int qlcnic_82xx_is_lb_pkt(u64 sts_data)
153 {
154 return (qlcnic_get_sts_status(sts_data) == STATUS_CKSUM_LOOP) ? 1 : 0;
155 }
156
qlcnic_delete_rx_list_mac(struct qlcnic_adapter * adapter,struct qlcnic_filter * fil,void * addr,u16 vlan_id)157 static void qlcnic_delete_rx_list_mac(struct qlcnic_adapter *adapter,
158 struct qlcnic_filter *fil,
159 void *addr, u16 vlan_id)
160 {
161 int ret;
162 u8 op;
163
164 op = vlan_id ? QLCNIC_MAC_VLAN_ADD : QLCNIC_MAC_ADD;
165 ret = qlcnic_sre_macaddr_change(adapter, addr, vlan_id, op);
166 if (ret)
167 return;
168
169 op = vlan_id ? QLCNIC_MAC_VLAN_DEL : QLCNIC_MAC_DEL;
170 ret = qlcnic_sre_macaddr_change(adapter, addr, vlan_id, op);
171 if (!ret) {
172 hlist_del(&fil->fnode);
173 adapter->rx_fhash.fnum--;
174 }
175 }
176
qlcnic_find_mac_filter(struct hlist_head * head,void * addr,u16 vlan_id)177 static struct qlcnic_filter *qlcnic_find_mac_filter(struct hlist_head *head,
178 void *addr, u16 vlan_id)
179 {
180 struct qlcnic_filter *tmp_fil = NULL;
181 struct hlist_node *n;
182
183 hlist_for_each_entry_safe(tmp_fil, n, head, fnode) {
184 if (ether_addr_equal(tmp_fil->faddr, addr) &&
185 tmp_fil->vlan_id == vlan_id)
186 return tmp_fil;
187 }
188
189 return NULL;
190 }
191
qlcnic_add_lb_filter(struct qlcnic_adapter * adapter,struct sk_buff * skb,int loopback_pkt,u16 vlan_id)192 static void qlcnic_add_lb_filter(struct qlcnic_adapter *adapter,
193 struct sk_buff *skb, int loopback_pkt, u16 vlan_id)
194 {
195 struct ethhdr *phdr = (struct ethhdr *)(skb->data);
196 struct qlcnic_filter *fil, *tmp_fil;
197 struct hlist_head *head;
198 unsigned long time;
199 u64 src_addr = 0;
200 u8 hindex, op;
201 int ret;
202
203 if (!qlcnic_sriov_pf_check(adapter) || (vlan_id == 0xffff))
204 vlan_id = 0;
205
206 memcpy(&src_addr, phdr->h_source, ETH_ALEN);
207 hindex = qlcnic_mac_hash(src_addr, vlan_id) &
208 (adapter->fhash.fbucket_size - 1);
209
210 if (loopback_pkt) {
211 if (adapter->rx_fhash.fnum >= adapter->rx_fhash.fmax)
212 return;
213
214 head = &(adapter->rx_fhash.fhead[hindex]);
215
216 tmp_fil = qlcnic_find_mac_filter(head, &src_addr, vlan_id);
217 if (tmp_fil) {
218 time = tmp_fil->ftime;
219 if (time_after(jiffies, QLCNIC_READD_AGE * HZ + time))
220 tmp_fil->ftime = jiffies;
221 return;
222 }
223
224 fil = kzalloc(sizeof(struct qlcnic_filter), GFP_ATOMIC);
225 if (!fil)
226 return;
227
228 fil->ftime = jiffies;
229 memcpy(fil->faddr, &src_addr, ETH_ALEN);
230 fil->vlan_id = vlan_id;
231 spin_lock(&adapter->rx_mac_learn_lock);
232 hlist_add_head(&(fil->fnode), head);
233 adapter->rx_fhash.fnum++;
234 spin_unlock(&adapter->rx_mac_learn_lock);
235 } else {
236 head = &adapter->fhash.fhead[hindex];
237
238 spin_lock(&adapter->mac_learn_lock);
239
240 tmp_fil = qlcnic_find_mac_filter(head, &src_addr, vlan_id);
241 if (tmp_fil) {
242 op = vlan_id ? QLCNIC_MAC_VLAN_DEL : QLCNIC_MAC_DEL;
243 ret = qlcnic_sre_macaddr_change(adapter,
244 (u8 *)&src_addr,
245 vlan_id, op);
246 if (!ret) {
247 hlist_del(&tmp_fil->fnode);
248 adapter->fhash.fnum--;
249 }
250
251 spin_unlock(&adapter->mac_learn_lock);
252
253 return;
254 }
255
256 spin_unlock(&adapter->mac_learn_lock);
257
258 head = &adapter->rx_fhash.fhead[hindex];
259
260 spin_lock(&adapter->rx_mac_learn_lock);
261
262 tmp_fil = qlcnic_find_mac_filter(head, &src_addr, vlan_id);
263 if (tmp_fil)
264 qlcnic_delete_rx_list_mac(adapter, tmp_fil, &src_addr,
265 vlan_id);
266
267 spin_unlock(&adapter->rx_mac_learn_lock);
268 }
269 }
270
qlcnic_82xx_change_filter(struct qlcnic_adapter * adapter,u64 * uaddr,u16 vlan_id)271 void qlcnic_82xx_change_filter(struct qlcnic_adapter *adapter, u64 *uaddr,
272 u16 vlan_id)
273 {
274 struct cmd_desc_type0 *hwdesc;
275 struct qlcnic_nic_req *req;
276 struct qlcnic_mac_req *mac_req;
277 struct qlcnic_vlan_req *vlan_req;
278 struct qlcnic_host_tx_ring *tx_ring = adapter->tx_ring;
279 u32 producer;
280 u64 word;
281
282 producer = tx_ring->producer;
283 hwdesc = &tx_ring->desc_head[tx_ring->producer];
284
285 req = (struct qlcnic_nic_req *)hwdesc;
286 memset(req, 0, sizeof(struct qlcnic_nic_req));
287 req->qhdr = cpu_to_le64(QLCNIC_REQUEST << 23);
288
289 word = QLCNIC_MAC_EVENT | ((u64)(adapter->portnum) << 16);
290 req->req_hdr = cpu_to_le64(word);
291
292 mac_req = (struct qlcnic_mac_req *)&(req->words[0]);
293 mac_req->op = vlan_id ? QLCNIC_MAC_VLAN_ADD : QLCNIC_MAC_ADD;
294 memcpy(mac_req->mac_addr, uaddr, ETH_ALEN);
295
296 vlan_req = (struct qlcnic_vlan_req *)&req->words[1];
297 vlan_req->vlan_id = cpu_to_le16(vlan_id);
298
299 tx_ring->producer = get_next_index(producer, tx_ring->num_desc);
300 smp_mb();
301 }
302
qlcnic_send_filter(struct qlcnic_adapter * adapter,struct cmd_desc_type0 * first_desc,struct sk_buff * skb)303 static void qlcnic_send_filter(struct qlcnic_adapter *adapter,
304 struct cmd_desc_type0 *first_desc,
305 struct sk_buff *skb)
306 {
307 struct vlan_ethhdr *vh = (struct vlan_ethhdr *)(skb->data);
308 struct ethhdr *phdr = (struct ethhdr *)(skb->data);
309 u16 protocol = ntohs(skb->protocol);
310 struct qlcnic_filter *fil, *tmp_fil;
311 struct hlist_head *head;
312 struct hlist_node *n;
313 u64 src_addr = 0;
314 u16 vlan_id = 0;
315 u8 hindex, hval;
316
317 if (ether_addr_equal(phdr->h_source, adapter->mac_addr))
318 return;
319
320 if (adapter->flags & QLCNIC_VLAN_FILTERING) {
321 if (protocol == ETH_P_8021Q) {
322 vh = (struct vlan_ethhdr *)skb->data;
323 vlan_id = ntohs(vh->h_vlan_TCI);
324 } else if (skb_vlan_tag_present(skb)) {
325 vlan_id = skb_vlan_tag_get(skb);
326 }
327 }
328
329 memcpy(&src_addr, phdr->h_source, ETH_ALEN);
330 hval = qlcnic_mac_hash(src_addr, vlan_id);
331 hindex = hval & (adapter->fhash.fbucket_size - 1);
332 head = &(adapter->fhash.fhead[hindex]);
333
334 hlist_for_each_entry_safe(tmp_fil, n, head, fnode) {
335 if (ether_addr_equal(tmp_fil->faddr, (u8 *)&src_addr) &&
336 tmp_fil->vlan_id == vlan_id) {
337 if (jiffies > (QLCNIC_READD_AGE * HZ + tmp_fil->ftime))
338 qlcnic_change_filter(adapter, &src_addr,
339 vlan_id);
340 tmp_fil->ftime = jiffies;
341 return;
342 }
343 }
344
345 if (unlikely(adapter->fhash.fnum >= adapter->fhash.fmax)) {
346 adapter->stats.mac_filter_limit_overrun++;
347 return;
348 }
349
350 fil = kzalloc(sizeof(struct qlcnic_filter), GFP_ATOMIC);
351 if (!fil)
352 return;
353
354 qlcnic_change_filter(adapter, &src_addr, vlan_id);
355 fil->ftime = jiffies;
356 fil->vlan_id = vlan_id;
357 memcpy(fil->faddr, &src_addr, ETH_ALEN);
358 spin_lock(&adapter->mac_learn_lock);
359 hlist_add_head(&(fil->fnode), head);
360 adapter->fhash.fnum++;
361 spin_unlock(&adapter->mac_learn_lock);
362 }
363
364 #define QLCNIC_ENCAP_VXLAN_PKT BIT_0
365 #define QLCNIC_ENCAP_OUTER_L3_IP6 BIT_1
366 #define QLCNIC_ENCAP_INNER_L3_IP6 BIT_2
367 #define QLCNIC_ENCAP_INNER_L4_UDP BIT_3
368 #define QLCNIC_ENCAP_DO_L3_CSUM BIT_4
369 #define QLCNIC_ENCAP_DO_L4_CSUM BIT_5
370
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)371 static int qlcnic_tx_encap_pkt(struct qlcnic_adapter *adapter,
372 struct cmd_desc_type0 *first_desc,
373 struct sk_buff *skb,
374 struct qlcnic_host_tx_ring *tx_ring)
375 {
376 u8 opcode = 0, inner_hdr_len = 0, outer_hdr_len = 0, total_hdr_len = 0;
377 int copied, copy_len, descr_size;
378 u32 producer = tx_ring->producer;
379 struct cmd_desc_type0 *hwdesc;
380 u16 flags = 0, encap_descr = 0;
381
382 opcode = QLCNIC_TX_ETHER_PKT;
383 encap_descr = QLCNIC_ENCAP_VXLAN_PKT;
384
385 if (skb_is_gso(skb)) {
386 inner_hdr_len = skb_inner_transport_header(skb) +
387 inner_tcp_hdrlen(skb) -
388 skb_inner_mac_header(skb);
389
390 /* VXLAN header size = 8 */
391 outer_hdr_len = skb_transport_offset(skb) + 8 +
392 sizeof(struct udphdr);
393 first_desc->outer_hdr_length = outer_hdr_len;
394 total_hdr_len = inner_hdr_len + outer_hdr_len;
395 encap_descr |= QLCNIC_ENCAP_DO_L3_CSUM |
396 QLCNIC_ENCAP_DO_L4_CSUM;
397 first_desc->mss = cpu_to_le16(skb_shinfo(skb)->gso_size);
398 first_desc->hdr_length = inner_hdr_len;
399
400 /* Copy inner and outer headers in Tx descriptor(s)
401 * If total_hdr_len > cmd_desc_type0, use multiple
402 * descriptors
403 */
404 copied = 0;
405 descr_size = (int)sizeof(struct cmd_desc_type0);
406 while (copied < total_hdr_len) {
407 copy_len = min(descr_size, (total_hdr_len - copied));
408 hwdesc = &tx_ring->desc_head[producer];
409 tx_ring->cmd_buf_arr[producer].skb = NULL;
410 skb_copy_from_linear_data_offset(skb, copied,
411 (char *)hwdesc,
412 copy_len);
413 copied += copy_len;
414 producer = get_next_index(producer, tx_ring->num_desc);
415 }
416
417 tx_ring->producer = producer;
418
419 /* Make sure updated tx_ring->producer is visible
420 * for qlcnic_tx_avail()
421 */
422 smp_mb();
423 adapter->stats.encap_lso_frames++;
424
425 opcode = QLCNIC_TX_ENCAP_LSO;
426 } else if (skb->ip_summed == CHECKSUM_PARTIAL) {
427 if (inner_ip_hdr(skb)->version == 6) {
428 if (inner_ipv6_hdr(skb)->nexthdr == IPPROTO_UDP)
429 encap_descr |= QLCNIC_ENCAP_INNER_L4_UDP;
430 } else {
431 if (inner_ip_hdr(skb)->protocol == IPPROTO_UDP)
432 encap_descr |= QLCNIC_ENCAP_INNER_L4_UDP;
433 }
434
435 adapter->stats.encap_tx_csummed++;
436 opcode = QLCNIC_TX_ENCAP_PKT;
437 }
438
439 /* Prepare first 16 bits of byte offset 16 of Tx descriptor */
440 if (ip_hdr(skb)->version == 6)
441 encap_descr |= QLCNIC_ENCAP_OUTER_L3_IP6;
442
443 /* outer IP header's size in 32bit words size*/
444 encap_descr |= (skb_network_header_len(skb) >> 2) << 6;
445
446 /* outer IP header offset */
447 encap_descr |= skb_network_offset(skb) << 10;
448 first_desc->encap_descr = cpu_to_le16(encap_descr);
449
450 first_desc->tcp_hdr_offset = skb_inner_transport_header(skb) -
451 skb->data;
452 first_desc->ip_hdr_offset = skb_inner_network_offset(skb);
453
454 qlcnic_set_tx_flags_opcode(first_desc, flags, opcode);
455
456 return 0;
457 }
458
qlcnic_tx_pkt(struct qlcnic_adapter * adapter,struct cmd_desc_type0 * first_desc,struct sk_buff * skb,struct qlcnic_host_tx_ring * tx_ring)459 static int qlcnic_tx_pkt(struct qlcnic_adapter *adapter,
460 struct cmd_desc_type0 *first_desc, struct sk_buff *skb,
461 struct qlcnic_host_tx_ring *tx_ring)
462 {
463 u8 l4proto, opcode = 0, hdr_len = 0;
464 u16 flags = 0, vlan_tci = 0;
465 int copied, offset, copy_len, size;
466 struct cmd_desc_type0 *hwdesc;
467 struct vlan_ethhdr *vh;
468 u16 protocol = ntohs(skb->protocol);
469 u32 producer = tx_ring->producer;
470
471 if (protocol == ETH_P_8021Q) {
472 vh = (struct vlan_ethhdr *)skb->data;
473 flags = QLCNIC_FLAGS_VLAN_TAGGED;
474 vlan_tci = ntohs(vh->h_vlan_TCI);
475 protocol = ntohs(vh->h_vlan_encapsulated_proto);
476 } else if (skb_vlan_tag_present(skb)) {
477 flags = QLCNIC_FLAGS_VLAN_OOB;
478 vlan_tci = skb_vlan_tag_get(skb);
479 }
480 if (unlikely(adapter->tx_pvid)) {
481 if (vlan_tci && !(adapter->flags & QLCNIC_TAGGING_ENABLED))
482 return -EIO;
483 if (vlan_tci && (adapter->flags & QLCNIC_TAGGING_ENABLED))
484 goto set_flags;
485
486 flags = QLCNIC_FLAGS_VLAN_OOB;
487 vlan_tci = adapter->tx_pvid;
488 }
489 set_flags:
490 qlcnic_set_tx_vlan_tci(first_desc, vlan_tci);
491 qlcnic_set_tx_flags_opcode(first_desc, flags, opcode);
492
493 if (*(skb->data) & BIT_0) {
494 flags |= BIT_0;
495 memcpy(&first_desc->eth_addr, skb->data, ETH_ALEN);
496 }
497 opcode = QLCNIC_TX_ETHER_PKT;
498 if (skb_is_gso(skb)) {
499 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
500 first_desc->mss = cpu_to_le16(skb_shinfo(skb)->gso_size);
501 first_desc->hdr_length = hdr_len;
502 opcode = (protocol == ETH_P_IPV6) ? QLCNIC_TX_TCP_LSO6 :
503 QLCNIC_TX_TCP_LSO;
504
505 /* For LSO, we need to copy the MAC/IP/TCP headers into
506 * the descriptor ring */
507 copied = 0;
508 offset = 2;
509
510 if (flags & QLCNIC_FLAGS_VLAN_OOB) {
511 first_desc->hdr_length += VLAN_HLEN;
512 first_desc->tcp_hdr_offset = VLAN_HLEN;
513 first_desc->ip_hdr_offset = VLAN_HLEN;
514
515 /* Only in case of TSO on vlan device */
516 flags |= QLCNIC_FLAGS_VLAN_TAGGED;
517
518 /* Create a TSO vlan header template for firmware */
519 hwdesc = &tx_ring->desc_head[producer];
520 tx_ring->cmd_buf_arr[producer].skb = NULL;
521
522 copy_len = min((int)sizeof(struct cmd_desc_type0) -
523 offset, hdr_len + VLAN_HLEN);
524
525 vh = (struct vlan_ethhdr *)((char *) hwdesc + 2);
526 skb_copy_from_linear_data(skb, vh, 12);
527 vh->h_vlan_proto = htons(ETH_P_8021Q);
528 vh->h_vlan_TCI = htons(vlan_tci);
529
530 skb_copy_from_linear_data_offset(skb, 12,
531 (char *)vh + 16,
532 copy_len - 16);
533 copied = copy_len - VLAN_HLEN;
534 offset = 0;
535 producer = get_next_index(producer, tx_ring->num_desc);
536 }
537
538 while (copied < hdr_len) {
539 size = (int)sizeof(struct cmd_desc_type0) - offset;
540 copy_len = min(size, (hdr_len - copied));
541 hwdesc = &tx_ring->desc_head[producer];
542 tx_ring->cmd_buf_arr[producer].skb = NULL;
543 skb_copy_from_linear_data_offset(skb, copied,
544 (char *)hwdesc +
545 offset, copy_len);
546 copied += copy_len;
547 offset = 0;
548 producer = get_next_index(producer, tx_ring->num_desc);
549 }
550
551 tx_ring->producer = producer;
552 smp_mb();
553 adapter->stats.lso_frames++;
554
555 } else if (skb->ip_summed == CHECKSUM_PARTIAL) {
556 if (protocol == ETH_P_IP) {
557 l4proto = ip_hdr(skb)->protocol;
558
559 if (l4proto == IPPROTO_TCP)
560 opcode = QLCNIC_TX_TCP_PKT;
561 else if (l4proto == IPPROTO_UDP)
562 opcode = QLCNIC_TX_UDP_PKT;
563 } else if (protocol == ETH_P_IPV6) {
564 l4proto = ipv6_hdr(skb)->nexthdr;
565
566 if (l4proto == IPPROTO_TCP)
567 opcode = QLCNIC_TX_TCPV6_PKT;
568 else if (l4proto == IPPROTO_UDP)
569 opcode = QLCNIC_TX_UDPV6_PKT;
570 }
571 }
572 first_desc->tcp_hdr_offset += skb_transport_offset(skb);
573 first_desc->ip_hdr_offset += skb_network_offset(skb);
574 qlcnic_set_tx_flags_opcode(first_desc, flags, opcode);
575
576 return 0;
577 }
578
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 struct skb_frag_struct *frag;
584 int i, nr_frags;
585 dma_addr_t map;
586
587 nr_frags = skb_shinfo(skb)->nr_frags;
588 nf = &pbuf->frag_array[0];
589
590 map = pci_map_single(pdev, skb->data, skb_headlen(skb),
591 PCI_DMA_TODEVICE);
592 if (pci_dma_mapping_error(pdev, map))
593 goto out_err;
594
595 nf->dma = map;
596 nf->length = skb_headlen(skb);
597
598 for (i = 0; i < nr_frags; i++) {
599 frag = &skb_shinfo(skb)->frags[i];
600 nf = &pbuf->frag_array[i+1];
601 map = skb_frag_dma_map(&pdev->dev, frag, 0, skb_frag_size(frag),
602 DMA_TO_DEVICE);
603 if (dma_mapping_error(&pdev->dev, map))
604 goto unwind;
605
606 nf->dma = map;
607 nf->length = skb_frag_size(frag);
608 }
609
610 return 0;
611
612 unwind:
613 while (--i >= 0) {
614 nf = &pbuf->frag_array[i+1];
615 pci_unmap_page(pdev, nf->dma, nf->length, PCI_DMA_TODEVICE);
616 }
617
618 nf = &pbuf->frag_array[0];
619 pci_unmap_single(pdev, nf->dma, skb_headlen(skb), PCI_DMA_TODEVICE);
620
621 out_err:
622 return -ENOMEM;
623 }
624
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 pci_unmap_page(pdev, nf->dma, nf->length, PCI_DMA_TODEVICE);
634 }
635
636 nf = &pbuf->frag_array[0];
637 pci_unmap_single(pdev, nf->dma, skb_headlen(skb), PCI_DMA_TODEVICE);
638 pbuf->skb = NULL;
639 }
640
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);
771
772 tx_ring->tx_stats.tx_bytes += skb->len;
773 tx_ring->tx_stats.xmit_called++;
774
775 qlcnic_update_cmd_producer(tx_ring);
776
777 return NETDEV_TX_OK;
778
779 unwind_buff:
780 qlcnic_unmap_buffers(pdev, skb, pbuf);
781 drop_packet:
782 adapter->stats.txdropped++;
783 dev_kfree_skb_any(skb);
784 return NETDEV_TX_OK;
785 }
786
qlcnic_advert_link_change(struct qlcnic_adapter * adapter,int linkup)787 void qlcnic_advert_link_change(struct qlcnic_adapter *adapter, int linkup)
788 {
789 struct net_device *netdev = adapter->netdev;
790
791 if (adapter->ahw->linkup && !linkup) {
792 netdev_info(netdev, "NIC Link is down\n");
793 adapter->ahw->linkup = 0;
794 netif_carrier_off(netdev);
795 } else if (!adapter->ahw->linkup && linkup) {
796 adapter->ahw->linkup = 1;
797
798 /* Do not advertise Link up to the stack if device
799 * is in loopback mode
800 */
801 if (qlcnic_83xx_check(adapter) && adapter->ahw->lb_mode) {
802 netdev_info(netdev, "NIC Link is up for loopback test\n");
803 return;
804 }
805
806 netdev_info(netdev, "NIC Link is up\n");
807 netif_carrier_on(netdev);
808 }
809 }
810
qlcnic_alloc_rx_skb(struct qlcnic_adapter * adapter,struct qlcnic_host_rds_ring * rds_ring,struct qlcnic_rx_buffer * buffer)811 static int qlcnic_alloc_rx_skb(struct qlcnic_adapter *adapter,
812 struct qlcnic_host_rds_ring *rds_ring,
813 struct qlcnic_rx_buffer *buffer)
814 {
815 struct sk_buff *skb;
816 dma_addr_t dma;
817 struct pci_dev *pdev = adapter->pdev;
818
819 skb = netdev_alloc_skb(adapter->netdev, rds_ring->skb_size);
820 if (!skb) {
821 adapter->stats.skb_alloc_failure++;
822 return -ENOMEM;
823 }
824
825 skb_reserve(skb, NET_IP_ALIGN);
826 dma = pci_map_single(pdev, skb->data,
827 rds_ring->dma_size, PCI_DMA_FROMDEVICE);
828
829 if (pci_dma_mapping_error(pdev, dma)) {
830 adapter->stats.rx_dma_map_error++;
831 dev_kfree_skb_any(skb);
832 return -ENOMEM;
833 }
834
835 buffer->skb = skb;
836 buffer->dma = dma;
837
838 return 0;
839 }
840
qlcnic_post_rx_buffers_nodb(struct qlcnic_adapter * adapter,struct qlcnic_host_rds_ring * rds_ring,u8 ring_id)841 static void qlcnic_post_rx_buffers_nodb(struct qlcnic_adapter *adapter,
842 struct qlcnic_host_rds_ring *rds_ring,
843 u8 ring_id)
844 {
845 struct rcv_desc *pdesc;
846 struct qlcnic_rx_buffer *buffer;
847 int count = 0;
848 uint32_t producer, handle;
849 struct list_head *head;
850
851 if (!spin_trylock(&rds_ring->lock))
852 return;
853
854 producer = rds_ring->producer;
855 head = &rds_ring->free_list;
856 while (!list_empty(head)) {
857 buffer = list_entry(head->next, struct qlcnic_rx_buffer, list);
858
859 if (!buffer->skb) {
860 if (qlcnic_alloc_rx_skb(adapter, rds_ring, buffer))
861 break;
862 }
863 count++;
864 list_del(&buffer->list);
865
866 /* make a rcv descriptor */
867 pdesc = &rds_ring->desc_head[producer];
868 handle = qlcnic_get_ref_handle(adapter,
869 buffer->ref_handle, ring_id);
870 pdesc->reference_handle = cpu_to_le16(handle);
871 pdesc->buffer_length = cpu_to_le32(rds_ring->dma_size);
872 pdesc->addr_buffer = cpu_to_le64(buffer->dma);
873 producer = get_next_index(producer, rds_ring->num_desc);
874 }
875 if (count) {
876 rds_ring->producer = producer;
877 writel((producer - 1) & (rds_ring->num_desc - 1),
878 rds_ring->crb_rcv_producer);
879 }
880 spin_unlock(&rds_ring->lock);
881 }
882
qlcnic_process_cmd_ring(struct qlcnic_adapter * adapter,struct qlcnic_host_tx_ring * tx_ring,int budget)883 static int qlcnic_process_cmd_ring(struct qlcnic_adapter *adapter,
884 struct qlcnic_host_tx_ring *tx_ring,
885 int budget)
886 {
887 u32 sw_consumer, hw_consumer;
888 int i, done, count = 0;
889 struct qlcnic_cmd_buffer *buffer;
890 struct pci_dev *pdev = adapter->pdev;
891 struct net_device *netdev = adapter->netdev;
892 struct qlcnic_skb_frag *frag;
893
894 if (!spin_trylock(&tx_ring->tx_clean_lock))
895 return 1;
896
897 sw_consumer = tx_ring->sw_consumer;
898 hw_consumer = le32_to_cpu(*(tx_ring->hw_consumer));
899
900 while (sw_consumer != hw_consumer) {
901 buffer = &tx_ring->cmd_buf_arr[sw_consumer];
902 if (buffer->skb) {
903 frag = &buffer->frag_array[0];
904 pci_unmap_single(pdev, frag->dma, frag->length,
905 PCI_DMA_TODEVICE);
906 frag->dma = 0ULL;
907 for (i = 1; i < buffer->frag_count; i++) {
908 frag++;
909 pci_unmap_page(pdev, frag->dma, frag->length,
910 PCI_DMA_TODEVICE);
911 frag->dma = 0ULL;
912 }
913 tx_ring->tx_stats.xmit_finished++;
914 dev_kfree_skb_any(buffer->skb);
915 buffer->skb = NULL;
916 }
917
918 sw_consumer = get_next_index(sw_consumer, tx_ring->num_desc);
919 if (++count >= budget)
920 break;
921 }
922
923 tx_ring->sw_consumer = sw_consumer;
924
925 if (count && netif_running(netdev)) {
926 smp_mb();
927 if (netif_tx_queue_stopped(tx_ring->txq) &&
928 netif_carrier_ok(netdev)) {
929 if (qlcnic_tx_avail(tx_ring) > TX_STOP_THRESH) {
930 netif_tx_wake_queue(tx_ring->txq);
931 tx_ring->tx_stats.xmit_on++;
932 }
933 }
934 adapter->tx_timeo_cnt = 0;
935 }
936 /*
937 * If everything is freed up to consumer then check if the ring is full
938 * If the ring is full then check if more needs to be freed and
939 * schedule the call back again.
940 *
941 * This happens when there are 2 CPUs. One could be freeing and the
942 * other filling it. If the ring is full when we get out of here and
943 * the card has already interrupted the host then the host can miss the
944 * interrupt.
945 *
946 * There is still a possible race condition and the host could miss an
947 * interrupt. The card has to take care of this.
948 */
949 hw_consumer = le32_to_cpu(*(tx_ring->hw_consumer));
950 done = (sw_consumer == hw_consumer);
951
952 spin_unlock(&tx_ring->tx_clean_lock);
953
954 return done;
955 }
956
qlcnic_poll(struct napi_struct * napi,int budget)957 static int qlcnic_poll(struct napi_struct *napi, int budget)
958 {
959 int tx_complete, work_done;
960 struct qlcnic_host_sds_ring *sds_ring;
961 struct qlcnic_adapter *adapter;
962 struct qlcnic_host_tx_ring *tx_ring;
963
964 sds_ring = container_of(napi, struct qlcnic_host_sds_ring, napi);
965 adapter = sds_ring->adapter;
966 tx_ring = sds_ring->tx_ring;
967
968 tx_complete = qlcnic_process_cmd_ring(adapter, tx_ring,
969 budget);
970 work_done = qlcnic_process_rcv_ring(sds_ring, budget);
971
972 /* Check if we need a repoll */
973 if (!tx_complete)
974 work_done = budget;
975
976 if (work_done < budget) {
977 napi_complete(&sds_ring->napi);
978 if (test_bit(__QLCNIC_DEV_UP, &adapter->state)) {
979 qlcnic_enable_sds_intr(adapter, sds_ring);
980 qlcnic_enable_tx_intr(adapter, tx_ring);
981 }
982 }
983
984 return work_done;
985 }
986
qlcnic_tx_poll(struct napi_struct * napi,int budget)987 static int qlcnic_tx_poll(struct napi_struct *napi, int budget)
988 {
989 struct qlcnic_host_tx_ring *tx_ring;
990 struct qlcnic_adapter *adapter;
991 int work_done;
992
993 tx_ring = container_of(napi, struct qlcnic_host_tx_ring, napi);
994 adapter = tx_ring->adapter;
995
996 work_done = qlcnic_process_cmd_ring(adapter, tx_ring, budget);
997 if (work_done) {
998 napi_complete(&tx_ring->napi);
999 if (test_bit(__QLCNIC_DEV_UP, &adapter->state))
1000 qlcnic_enable_tx_intr(adapter, tx_ring);
1001 } else {
1002 /* As qlcnic_process_cmd_ring() returned 0, we need a repoll*/
1003 work_done = budget;
1004 }
1005
1006 return work_done;
1007 }
1008
qlcnic_rx_poll(struct napi_struct * napi,int budget)1009 static int qlcnic_rx_poll(struct napi_struct *napi, int budget)
1010 {
1011 struct qlcnic_host_sds_ring *sds_ring;
1012 struct qlcnic_adapter *adapter;
1013 int work_done;
1014
1015 sds_ring = container_of(napi, struct qlcnic_host_sds_ring, napi);
1016 adapter = sds_ring->adapter;
1017
1018 work_done = qlcnic_process_rcv_ring(sds_ring, budget);
1019
1020 if (work_done < budget) {
1021 napi_complete(&sds_ring->napi);
1022 if (test_bit(__QLCNIC_DEV_UP, &adapter->state))
1023 qlcnic_enable_sds_intr(adapter, sds_ring);
1024 }
1025
1026 return work_done;
1027 }
1028
qlcnic_handle_linkevent(struct qlcnic_adapter * adapter,struct qlcnic_fw_msg * msg)1029 static void qlcnic_handle_linkevent(struct qlcnic_adapter *adapter,
1030 struct qlcnic_fw_msg *msg)
1031 {
1032 u32 cable_OUI;
1033 u16 cable_len, link_speed;
1034 u8 link_status, module, duplex, autoneg, lb_status = 0;
1035 struct net_device *netdev = adapter->netdev;
1036
1037 adapter->ahw->has_link_events = 1;
1038
1039 cable_OUI = msg->body[1] & 0xffffffff;
1040 cable_len = (msg->body[1] >> 32) & 0xffff;
1041 link_speed = (msg->body[1] >> 48) & 0xffff;
1042
1043 link_status = msg->body[2] & 0xff;
1044 duplex = (msg->body[2] >> 16) & 0xff;
1045 autoneg = (msg->body[2] >> 24) & 0xff;
1046 lb_status = (msg->body[2] >> 32) & 0x3;
1047
1048 module = (msg->body[2] >> 8) & 0xff;
1049 if (module == LINKEVENT_MODULE_TWINAX_UNSUPPORTED_CABLE)
1050 dev_info(&netdev->dev,
1051 "unsupported cable: OUI 0x%x, length %d\n",
1052 cable_OUI, cable_len);
1053 else if (module == LINKEVENT_MODULE_TWINAX_UNSUPPORTED_CABLELEN)
1054 dev_info(&netdev->dev, "unsupported cable length %d\n",
1055 cable_len);
1056
1057 if (!link_status && (lb_status == QLCNIC_ILB_MODE ||
1058 lb_status == QLCNIC_ELB_MODE))
1059 adapter->ahw->loopback_state |= QLCNIC_LINKEVENT;
1060
1061 qlcnic_advert_link_change(adapter, link_status);
1062
1063 if (duplex == LINKEVENT_FULL_DUPLEX)
1064 adapter->ahw->link_duplex = DUPLEX_FULL;
1065 else
1066 adapter->ahw->link_duplex = DUPLEX_HALF;
1067
1068 adapter->ahw->module_type = module;
1069 adapter->ahw->link_autoneg = autoneg;
1070
1071 if (link_status) {
1072 adapter->ahw->link_speed = link_speed;
1073 } else {
1074 adapter->ahw->link_speed = SPEED_UNKNOWN;
1075 adapter->ahw->link_duplex = DUPLEX_UNKNOWN;
1076 }
1077 }
1078
qlcnic_handle_fw_message(int desc_cnt,int index,struct qlcnic_host_sds_ring * sds_ring)1079 static void qlcnic_handle_fw_message(int desc_cnt, int index,
1080 struct qlcnic_host_sds_ring *sds_ring)
1081 {
1082 struct qlcnic_fw_msg msg;
1083 struct status_desc *desc;
1084 struct qlcnic_adapter *adapter;
1085 struct device *dev;
1086 int i = 0, opcode, ret;
1087
1088 while (desc_cnt > 0 && i < 8) {
1089 desc = &sds_ring->desc_head[index];
1090 msg.words[i++] = le64_to_cpu(desc->status_desc_data[0]);
1091 msg.words[i++] = le64_to_cpu(desc->status_desc_data[1]);
1092
1093 index = get_next_index(index, sds_ring->num_desc);
1094 desc_cnt--;
1095 }
1096
1097 adapter = sds_ring->adapter;
1098 dev = &adapter->pdev->dev;
1099 opcode = qlcnic_get_nic_msg_opcode(msg.body[0]);
1100
1101 switch (opcode) {
1102 case QLCNIC_C2H_OPCODE_GET_LINKEVENT_RESPONSE:
1103 qlcnic_handle_linkevent(adapter, &msg);
1104 break;
1105 case QLCNIC_C2H_OPCODE_CONFIG_LOOPBACK:
1106 ret = (u32)(msg.body[1]);
1107 switch (ret) {
1108 case 0:
1109 adapter->ahw->loopback_state |= QLCNIC_LB_RESPONSE;
1110 break;
1111 case 1:
1112 dev_info(dev, "loopback already in progress\n");
1113 adapter->ahw->diag_cnt = -EINPROGRESS;
1114 break;
1115 case 2:
1116 dev_info(dev, "loopback cable is not connected\n");
1117 adapter->ahw->diag_cnt = -ENODEV;
1118 break;
1119 default:
1120 dev_info(dev,
1121 "loopback configure request failed, err %x\n",
1122 ret);
1123 adapter->ahw->diag_cnt = -EIO;
1124 break;
1125 }
1126 break;
1127 case QLCNIC_C2H_OPCODE_GET_DCB_AEN:
1128 qlcnic_dcb_aen_handler(adapter->dcb, (void *)&msg);
1129 break;
1130 default:
1131 break;
1132 }
1133 }
1134
qlcnic_process_rxbuf(struct qlcnic_adapter * adapter,struct qlcnic_host_rds_ring * ring,u16 index,u16 cksum)1135 static struct sk_buff *qlcnic_process_rxbuf(struct qlcnic_adapter *adapter,
1136 struct qlcnic_host_rds_ring *ring,
1137 u16 index, u16 cksum)
1138 {
1139 struct qlcnic_rx_buffer *buffer;
1140 struct sk_buff *skb;
1141
1142 buffer = &ring->rx_buf_arr[index];
1143 if (unlikely(buffer->skb == NULL)) {
1144 WARN_ON(1);
1145 return NULL;
1146 }
1147
1148 pci_unmap_single(adapter->pdev, buffer->dma, ring->dma_size,
1149 PCI_DMA_FROMDEVICE);
1150
1151 skb = buffer->skb;
1152 if (likely((adapter->netdev->features & NETIF_F_RXCSUM) &&
1153 (cksum == STATUS_CKSUM_OK || cksum == STATUS_CKSUM_LOOP))) {
1154 adapter->stats.csummed++;
1155 skb->ip_summed = CHECKSUM_UNNECESSARY;
1156 } else {
1157 skb_checksum_none_assert(skb);
1158 }
1159
1160
1161 buffer->skb = NULL;
1162
1163 return skb;
1164 }
1165
qlcnic_check_rx_tagging(struct qlcnic_adapter * adapter,struct sk_buff * skb,u16 * vlan_tag)1166 static inline int qlcnic_check_rx_tagging(struct qlcnic_adapter *adapter,
1167 struct sk_buff *skb, u16 *vlan_tag)
1168 {
1169 struct ethhdr *eth_hdr;
1170
1171 if (!__vlan_get_tag(skb, vlan_tag)) {
1172 eth_hdr = (struct ethhdr *)skb->data;
1173 memmove(skb->data + VLAN_HLEN, eth_hdr, ETH_ALEN * 2);
1174 skb_pull(skb, VLAN_HLEN);
1175 }
1176 if (!adapter->rx_pvid)
1177 return 0;
1178
1179 if (*vlan_tag == adapter->rx_pvid) {
1180 /* Outer vlan tag. Packet should follow non-vlan path */
1181 *vlan_tag = 0xffff;
1182 return 0;
1183 }
1184 if (adapter->flags & QLCNIC_TAGGING_ENABLED)
1185 return 0;
1186
1187 return -EINVAL;
1188 }
1189
1190 static struct qlcnic_rx_buffer *
qlcnic_process_rcv(struct qlcnic_adapter * adapter,struct qlcnic_host_sds_ring * sds_ring,int ring,u64 sts_data0)1191 qlcnic_process_rcv(struct qlcnic_adapter *adapter,
1192 struct qlcnic_host_sds_ring *sds_ring, int ring,
1193 u64 sts_data0)
1194 {
1195 struct net_device *netdev = adapter->netdev;
1196 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1197 struct qlcnic_rx_buffer *buffer;
1198 struct sk_buff *skb;
1199 struct qlcnic_host_rds_ring *rds_ring;
1200 int index, length, cksum, pkt_offset, is_lb_pkt;
1201 u16 vid = 0xffff, t_vid;
1202
1203 if (unlikely(ring >= adapter->max_rds_rings))
1204 return NULL;
1205
1206 rds_ring = &recv_ctx->rds_rings[ring];
1207
1208 index = qlcnic_get_sts_refhandle(sts_data0);
1209 if (unlikely(index >= rds_ring->num_desc))
1210 return NULL;
1211
1212 buffer = &rds_ring->rx_buf_arr[index];
1213 length = qlcnic_get_sts_totallength(sts_data0);
1214 cksum = qlcnic_get_sts_status(sts_data0);
1215 pkt_offset = qlcnic_get_sts_pkt_offset(sts_data0);
1216
1217 skb = qlcnic_process_rxbuf(adapter, rds_ring, index, cksum);
1218 if (!skb)
1219 return buffer;
1220
1221 if (adapter->rx_mac_learn) {
1222 t_vid = 0;
1223 is_lb_pkt = qlcnic_82xx_is_lb_pkt(sts_data0);
1224 qlcnic_add_lb_filter(adapter, skb, is_lb_pkt, t_vid);
1225 }
1226
1227 if (length > rds_ring->skb_size)
1228 skb_put(skb, rds_ring->skb_size);
1229 else
1230 skb_put(skb, length);
1231
1232 if (pkt_offset)
1233 skb_pull(skb, pkt_offset);
1234
1235 if (unlikely(qlcnic_check_rx_tagging(adapter, skb, &vid))) {
1236 adapter->stats.rxdropped++;
1237 dev_kfree_skb(skb);
1238 return buffer;
1239 }
1240
1241 skb->protocol = eth_type_trans(skb, netdev);
1242
1243 if (vid != 0xffff)
1244 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid);
1245
1246 napi_gro_receive(&sds_ring->napi, skb);
1247
1248 adapter->stats.rx_pkts++;
1249 adapter->stats.rxbytes += length;
1250
1251 return buffer;
1252 }
1253
1254 #define QLC_TCP_HDR_SIZE 20
1255 #define QLC_TCP_TS_OPTION_SIZE 12
1256 #define QLC_TCP_TS_HDR_SIZE (QLC_TCP_HDR_SIZE + QLC_TCP_TS_OPTION_SIZE)
1257
1258 static struct qlcnic_rx_buffer *
qlcnic_process_lro(struct qlcnic_adapter * adapter,int ring,u64 sts_data0,u64 sts_data1)1259 qlcnic_process_lro(struct qlcnic_adapter *adapter,
1260 int ring, u64 sts_data0, u64 sts_data1)
1261 {
1262 struct net_device *netdev = adapter->netdev;
1263 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1264 struct qlcnic_rx_buffer *buffer;
1265 struct sk_buff *skb;
1266 struct qlcnic_host_rds_ring *rds_ring;
1267 struct iphdr *iph;
1268 struct ipv6hdr *ipv6h;
1269 struct tcphdr *th;
1270 bool push, timestamp;
1271 int index, l2_hdr_offset, l4_hdr_offset, is_lb_pkt;
1272 u16 lro_length, length, data_offset, t_vid, vid = 0xffff;
1273 u32 seq_number;
1274
1275 if (unlikely(ring >= adapter->max_rds_rings))
1276 return NULL;
1277
1278 rds_ring = &recv_ctx->rds_rings[ring];
1279
1280 index = qlcnic_get_lro_sts_refhandle(sts_data0);
1281 if (unlikely(index >= rds_ring->num_desc))
1282 return NULL;
1283
1284 buffer = &rds_ring->rx_buf_arr[index];
1285
1286 timestamp = qlcnic_get_lro_sts_timestamp(sts_data0);
1287 lro_length = qlcnic_get_lro_sts_length(sts_data0);
1288 l2_hdr_offset = qlcnic_get_lro_sts_l2_hdr_offset(sts_data0);
1289 l4_hdr_offset = qlcnic_get_lro_sts_l4_hdr_offset(sts_data0);
1290 push = qlcnic_get_lro_sts_push_flag(sts_data0);
1291 seq_number = qlcnic_get_lro_sts_seq_number(sts_data1);
1292
1293 skb = qlcnic_process_rxbuf(adapter, rds_ring, index, STATUS_CKSUM_OK);
1294 if (!skb)
1295 return buffer;
1296
1297 if (adapter->rx_mac_learn) {
1298 t_vid = 0;
1299 is_lb_pkt = qlcnic_82xx_is_lb_pkt(sts_data0);
1300 qlcnic_add_lb_filter(adapter, skb, is_lb_pkt, t_vid);
1301 }
1302
1303 if (timestamp)
1304 data_offset = l4_hdr_offset + QLC_TCP_TS_HDR_SIZE;
1305 else
1306 data_offset = l4_hdr_offset + QLC_TCP_HDR_SIZE;
1307
1308 skb_put(skb, lro_length + data_offset);
1309 skb_pull(skb, l2_hdr_offset);
1310
1311 if (unlikely(qlcnic_check_rx_tagging(adapter, skb, &vid))) {
1312 adapter->stats.rxdropped++;
1313 dev_kfree_skb(skb);
1314 return buffer;
1315 }
1316
1317 skb->protocol = eth_type_trans(skb, netdev);
1318
1319 if (ntohs(skb->protocol) == ETH_P_IPV6) {
1320 ipv6h = (struct ipv6hdr *)skb->data;
1321 th = (struct tcphdr *)(skb->data + sizeof(struct ipv6hdr));
1322 length = (th->doff << 2) + lro_length;
1323 ipv6h->payload_len = htons(length);
1324 } else {
1325 iph = (struct iphdr *)skb->data;
1326 th = (struct tcphdr *)(skb->data + (iph->ihl << 2));
1327 length = (iph->ihl << 2) + (th->doff << 2) + lro_length;
1328 csum_replace2(&iph->check, iph->tot_len, htons(length));
1329 iph->tot_len = htons(length);
1330 }
1331
1332 th->psh = push;
1333 th->seq = htonl(seq_number);
1334 length = skb->len;
1335
1336 if (adapter->flags & QLCNIC_FW_LRO_MSS_CAP) {
1337 skb_shinfo(skb)->gso_size = qlcnic_get_lro_sts_mss(sts_data1);
1338 if (skb->protocol == htons(ETH_P_IPV6))
1339 skb_shinfo(skb)->gso_type = SKB_GSO_TCPV6;
1340 else
1341 skb_shinfo(skb)->gso_type = SKB_GSO_TCPV4;
1342 }
1343
1344 if (vid != 0xffff)
1345 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid);
1346 netif_receive_skb(skb);
1347
1348 adapter->stats.lro_pkts++;
1349 adapter->stats.lrobytes += length;
1350
1351 return buffer;
1352 }
1353
qlcnic_process_rcv_ring(struct qlcnic_host_sds_ring * sds_ring,int max)1354 static int qlcnic_process_rcv_ring(struct qlcnic_host_sds_ring *sds_ring, int max)
1355 {
1356 struct qlcnic_host_rds_ring *rds_ring;
1357 struct qlcnic_adapter *adapter = sds_ring->adapter;
1358 struct list_head *cur;
1359 struct status_desc *desc;
1360 struct qlcnic_rx_buffer *rxbuf;
1361 int opcode, desc_cnt, count = 0;
1362 u64 sts_data0, sts_data1;
1363 u8 ring;
1364 u32 consumer = sds_ring->consumer;
1365
1366 while (count < max) {
1367 desc = &sds_ring->desc_head[consumer];
1368 sts_data0 = le64_to_cpu(desc->status_desc_data[0]);
1369
1370 if (!(sts_data0 & STATUS_OWNER_HOST))
1371 break;
1372
1373 desc_cnt = qlcnic_get_sts_desc_cnt(sts_data0);
1374 opcode = qlcnic_get_sts_opcode(sts_data0);
1375 switch (opcode) {
1376 case QLCNIC_RXPKT_DESC:
1377 case QLCNIC_OLD_RXPKT_DESC:
1378 case QLCNIC_SYN_OFFLOAD:
1379 ring = qlcnic_get_sts_type(sts_data0);
1380 rxbuf = qlcnic_process_rcv(adapter, sds_ring, ring,
1381 sts_data0);
1382 break;
1383 case QLCNIC_LRO_DESC:
1384 ring = qlcnic_get_lro_sts_type(sts_data0);
1385 sts_data1 = le64_to_cpu(desc->status_desc_data[1]);
1386 rxbuf = qlcnic_process_lro(adapter, ring, sts_data0,
1387 sts_data1);
1388 break;
1389 case QLCNIC_RESPONSE_DESC:
1390 qlcnic_handle_fw_message(desc_cnt, consumer, sds_ring);
1391 default:
1392 goto skip;
1393 }
1394 WARN_ON(desc_cnt > 1);
1395
1396 if (likely(rxbuf))
1397 list_add_tail(&rxbuf->list, &sds_ring->free_list[ring]);
1398 else
1399 adapter->stats.null_rxbuf++;
1400 skip:
1401 for (; desc_cnt > 0; desc_cnt--) {
1402 desc = &sds_ring->desc_head[consumer];
1403 desc->status_desc_data[0] = QLCNIC_DESC_OWNER_FW;
1404 consumer = get_next_index(consumer, sds_ring->num_desc);
1405 }
1406 count++;
1407 }
1408
1409 for (ring = 0; ring < adapter->max_rds_rings; ring++) {
1410 rds_ring = &adapter->recv_ctx->rds_rings[ring];
1411 if (!list_empty(&sds_ring->free_list[ring])) {
1412 list_for_each(cur, &sds_ring->free_list[ring]) {
1413 rxbuf = list_entry(cur, struct qlcnic_rx_buffer,
1414 list);
1415 qlcnic_alloc_rx_skb(adapter, rds_ring, rxbuf);
1416 }
1417 spin_lock(&rds_ring->lock);
1418 list_splice_tail_init(&sds_ring->free_list[ring],
1419 &rds_ring->free_list);
1420 spin_unlock(&rds_ring->lock);
1421 }
1422
1423 qlcnic_post_rx_buffers_nodb(adapter, rds_ring, ring);
1424 }
1425
1426 if (count) {
1427 sds_ring->consumer = consumer;
1428 writel(consumer, sds_ring->crb_sts_consumer);
1429 }
1430
1431 return count;
1432 }
1433
qlcnic_post_rx_buffers(struct qlcnic_adapter * adapter,struct qlcnic_host_rds_ring * rds_ring,u8 ring_id)1434 void qlcnic_post_rx_buffers(struct qlcnic_adapter *adapter,
1435 struct qlcnic_host_rds_ring *rds_ring, u8 ring_id)
1436 {
1437 struct rcv_desc *pdesc;
1438 struct qlcnic_rx_buffer *buffer;
1439 int count = 0;
1440 u32 producer, handle;
1441 struct list_head *head;
1442
1443 producer = rds_ring->producer;
1444 head = &rds_ring->free_list;
1445
1446 while (!list_empty(head)) {
1447
1448 buffer = list_entry(head->next, struct qlcnic_rx_buffer, list);
1449
1450 if (!buffer->skb) {
1451 if (qlcnic_alloc_rx_skb(adapter, rds_ring, buffer))
1452 break;
1453 }
1454
1455 count++;
1456 list_del(&buffer->list);
1457
1458 /* make a rcv descriptor */
1459 pdesc = &rds_ring->desc_head[producer];
1460 pdesc->addr_buffer = cpu_to_le64(buffer->dma);
1461 handle = qlcnic_get_ref_handle(adapter, buffer->ref_handle,
1462 ring_id);
1463 pdesc->reference_handle = cpu_to_le16(handle);
1464 pdesc->buffer_length = cpu_to_le32(rds_ring->dma_size);
1465 producer = get_next_index(producer, rds_ring->num_desc);
1466 }
1467
1468 if (count) {
1469 rds_ring->producer = producer;
1470 writel((producer-1) & (rds_ring->num_desc-1),
1471 rds_ring->crb_rcv_producer);
1472 }
1473 }
1474
dump_skb(struct sk_buff * skb,struct qlcnic_adapter * adapter)1475 static void dump_skb(struct sk_buff *skb, struct qlcnic_adapter *adapter)
1476 {
1477 if (adapter->ahw->msg_enable & NETIF_MSG_DRV) {
1478 char prefix[30];
1479
1480 scnprintf(prefix, sizeof(prefix), "%s: %s: ",
1481 dev_name(&adapter->pdev->dev), __func__);
1482
1483 print_hex_dump_debug(prefix, DUMP_PREFIX_NONE, 16, 1,
1484 skb->data, skb->len, true);
1485 }
1486 }
1487
qlcnic_process_rcv_diag(struct qlcnic_adapter * adapter,int ring,u64 sts_data0)1488 static void qlcnic_process_rcv_diag(struct qlcnic_adapter *adapter, int ring,
1489 u64 sts_data0)
1490 {
1491 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1492 struct sk_buff *skb;
1493 struct qlcnic_host_rds_ring *rds_ring;
1494 int index, length, cksum, pkt_offset;
1495
1496 if (unlikely(ring >= adapter->max_rds_rings))
1497 return;
1498
1499 rds_ring = &recv_ctx->rds_rings[ring];
1500
1501 index = qlcnic_get_sts_refhandle(sts_data0);
1502 length = qlcnic_get_sts_totallength(sts_data0);
1503 if (unlikely(index >= rds_ring->num_desc))
1504 return;
1505
1506 cksum = qlcnic_get_sts_status(sts_data0);
1507 pkt_offset = qlcnic_get_sts_pkt_offset(sts_data0);
1508
1509 skb = qlcnic_process_rxbuf(adapter, rds_ring, index, cksum);
1510 if (!skb)
1511 return;
1512
1513 if (length > rds_ring->skb_size)
1514 skb_put(skb, rds_ring->skb_size);
1515 else
1516 skb_put(skb, length);
1517
1518 if (pkt_offset)
1519 skb_pull(skb, pkt_offset);
1520
1521 if (!qlcnic_check_loopback_buff(skb->data, adapter->mac_addr))
1522 adapter->ahw->diag_cnt++;
1523 else
1524 dump_skb(skb, adapter);
1525
1526 dev_kfree_skb_any(skb);
1527 adapter->stats.rx_pkts++;
1528 adapter->stats.rxbytes += length;
1529
1530 return;
1531 }
1532
qlcnic_82xx_process_rcv_ring_diag(struct qlcnic_host_sds_ring * sds_ring)1533 void qlcnic_82xx_process_rcv_ring_diag(struct qlcnic_host_sds_ring *sds_ring)
1534 {
1535 struct qlcnic_adapter *adapter = sds_ring->adapter;
1536 struct status_desc *desc;
1537 u64 sts_data0;
1538 int ring, opcode, desc_cnt;
1539
1540 u32 consumer = sds_ring->consumer;
1541
1542 desc = &sds_ring->desc_head[consumer];
1543 sts_data0 = le64_to_cpu(desc->status_desc_data[0]);
1544
1545 if (!(sts_data0 & STATUS_OWNER_HOST))
1546 return;
1547
1548 desc_cnt = qlcnic_get_sts_desc_cnt(sts_data0);
1549 opcode = qlcnic_get_sts_opcode(sts_data0);
1550 switch (opcode) {
1551 case QLCNIC_RESPONSE_DESC:
1552 qlcnic_handle_fw_message(desc_cnt, consumer, sds_ring);
1553 break;
1554 default:
1555 ring = qlcnic_get_sts_type(sts_data0);
1556 qlcnic_process_rcv_diag(adapter, ring, sts_data0);
1557 break;
1558 }
1559
1560 for (; desc_cnt > 0; desc_cnt--) {
1561 desc = &sds_ring->desc_head[consumer];
1562 desc->status_desc_data[0] = cpu_to_le64(STATUS_OWNER_PHANTOM);
1563 consumer = get_next_index(consumer, sds_ring->num_desc);
1564 }
1565
1566 sds_ring->consumer = consumer;
1567 writel(consumer, sds_ring->crb_sts_consumer);
1568 }
1569
qlcnic_82xx_napi_add(struct qlcnic_adapter * adapter,struct net_device * netdev)1570 int qlcnic_82xx_napi_add(struct qlcnic_adapter *adapter,
1571 struct net_device *netdev)
1572 {
1573 int ring;
1574 struct qlcnic_host_sds_ring *sds_ring;
1575 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1576 struct qlcnic_host_tx_ring *tx_ring;
1577
1578 if (qlcnic_alloc_sds_rings(recv_ctx, adapter->drv_sds_rings))
1579 return -ENOMEM;
1580
1581 for (ring = 0; ring < adapter->drv_sds_rings; ring++) {
1582 sds_ring = &recv_ctx->sds_rings[ring];
1583 if (qlcnic_check_multi_tx(adapter) &&
1584 !adapter->ahw->diag_test) {
1585 netif_napi_add(netdev, &sds_ring->napi, qlcnic_rx_poll,
1586 NAPI_POLL_WEIGHT);
1587 } else {
1588 if (ring == (adapter->drv_sds_rings - 1))
1589 netif_napi_add(netdev, &sds_ring->napi,
1590 qlcnic_poll,
1591 NAPI_POLL_WEIGHT);
1592 else
1593 netif_napi_add(netdev, &sds_ring->napi,
1594 qlcnic_rx_poll,
1595 NAPI_POLL_WEIGHT);
1596 }
1597 }
1598
1599 if (qlcnic_alloc_tx_rings(adapter, netdev)) {
1600 qlcnic_free_sds_rings(recv_ctx);
1601 return -ENOMEM;
1602 }
1603
1604 if (qlcnic_check_multi_tx(adapter) && !adapter->ahw->diag_test) {
1605 for (ring = 0; ring < adapter->drv_tx_rings; ring++) {
1606 tx_ring = &adapter->tx_ring[ring];
1607 netif_napi_add(netdev, &tx_ring->napi, qlcnic_tx_poll,
1608 NAPI_POLL_WEIGHT);
1609 }
1610 }
1611
1612 return 0;
1613 }
1614
qlcnic_82xx_napi_del(struct qlcnic_adapter * adapter)1615 void qlcnic_82xx_napi_del(struct qlcnic_adapter *adapter)
1616 {
1617 int ring;
1618 struct qlcnic_host_sds_ring *sds_ring;
1619 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1620 struct qlcnic_host_tx_ring *tx_ring;
1621
1622 for (ring = 0; ring < adapter->drv_sds_rings; ring++) {
1623 sds_ring = &recv_ctx->sds_rings[ring];
1624 netif_napi_del(&sds_ring->napi);
1625 }
1626
1627 qlcnic_free_sds_rings(adapter->recv_ctx);
1628
1629 if (qlcnic_check_multi_tx(adapter) && !adapter->ahw->diag_test) {
1630 for (ring = 0; ring < adapter->drv_tx_rings; ring++) {
1631 tx_ring = &adapter->tx_ring[ring];
1632 netif_napi_del(&tx_ring->napi);
1633 }
1634 }
1635
1636 qlcnic_free_tx_rings(adapter);
1637 }
1638
qlcnic_82xx_napi_enable(struct qlcnic_adapter * adapter)1639 void qlcnic_82xx_napi_enable(struct qlcnic_adapter *adapter)
1640 {
1641 int ring;
1642 struct qlcnic_host_sds_ring *sds_ring;
1643 struct qlcnic_host_tx_ring *tx_ring;
1644 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1645
1646 if (adapter->is_up != QLCNIC_ADAPTER_UP_MAGIC)
1647 return;
1648
1649 for (ring = 0; ring < adapter->drv_sds_rings; ring++) {
1650 sds_ring = &recv_ctx->sds_rings[ring];
1651 napi_enable(&sds_ring->napi);
1652 qlcnic_enable_sds_intr(adapter, sds_ring);
1653 }
1654
1655 if (qlcnic_check_multi_tx(adapter) &&
1656 (adapter->flags & QLCNIC_MSIX_ENABLED) &&
1657 !adapter->ahw->diag_test) {
1658 for (ring = 0; ring < adapter->drv_tx_rings; ring++) {
1659 tx_ring = &adapter->tx_ring[ring];
1660 napi_enable(&tx_ring->napi);
1661 qlcnic_enable_tx_intr(adapter, tx_ring);
1662 }
1663 }
1664 }
1665
qlcnic_82xx_napi_disable(struct qlcnic_adapter * adapter)1666 void qlcnic_82xx_napi_disable(struct qlcnic_adapter *adapter)
1667 {
1668 int ring;
1669 struct qlcnic_host_sds_ring *sds_ring;
1670 struct qlcnic_host_tx_ring *tx_ring;
1671 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1672
1673 if (adapter->is_up != QLCNIC_ADAPTER_UP_MAGIC)
1674 return;
1675
1676 for (ring = 0; ring < adapter->drv_sds_rings; ring++) {
1677 sds_ring = &recv_ctx->sds_rings[ring];
1678 qlcnic_disable_sds_intr(adapter, sds_ring);
1679 napi_synchronize(&sds_ring->napi);
1680 napi_disable(&sds_ring->napi);
1681 }
1682
1683 if ((adapter->flags & QLCNIC_MSIX_ENABLED) &&
1684 !adapter->ahw->diag_test &&
1685 qlcnic_check_multi_tx(adapter)) {
1686 for (ring = 0; ring < adapter->drv_tx_rings; ring++) {
1687 tx_ring = &adapter->tx_ring[ring];
1688 qlcnic_disable_tx_intr(adapter, tx_ring);
1689 napi_synchronize(&tx_ring->napi);
1690 napi_disable(&tx_ring->napi);
1691 }
1692 }
1693 }
1694
1695 #define QLC_83XX_NORMAL_LB_PKT (1ULL << 36)
1696 #define QLC_83XX_LRO_LB_PKT (1ULL << 46)
1697
qlcnic_83xx_is_lb_pkt(u64 sts_data,int lro_pkt)1698 static inline int qlcnic_83xx_is_lb_pkt(u64 sts_data, int lro_pkt)
1699 {
1700 if (lro_pkt)
1701 return (sts_data & QLC_83XX_LRO_LB_PKT) ? 1 : 0;
1702 else
1703 return (sts_data & QLC_83XX_NORMAL_LB_PKT) ? 1 : 0;
1704 }
1705
1706 #define QLCNIC_ENCAP_LENGTH_MASK 0x7f
1707
qlcnic_encap_length(u64 sts_data)1708 static inline u8 qlcnic_encap_length(u64 sts_data)
1709 {
1710 return sts_data & QLCNIC_ENCAP_LENGTH_MASK;
1711 }
1712
1713 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[])1714 qlcnic_83xx_process_rcv(struct qlcnic_adapter *adapter,
1715 struct qlcnic_host_sds_ring *sds_ring,
1716 u8 ring, u64 sts_data[])
1717 {
1718 struct net_device *netdev = adapter->netdev;
1719 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1720 struct qlcnic_rx_buffer *buffer;
1721 struct sk_buff *skb;
1722 struct qlcnic_host_rds_ring *rds_ring;
1723 int index, length, cksum, is_lb_pkt;
1724 u16 vid = 0xffff;
1725 int err;
1726
1727 if (unlikely(ring >= adapter->max_rds_rings))
1728 return NULL;
1729
1730 rds_ring = &recv_ctx->rds_rings[ring];
1731
1732 index = qlcnic_83xx_hndl(sts_data[0]);
1733 if (unlikely(index >= rds_ring->num_desc))
1734 return NULL;
1735
1736 buffer = &rds_ring->rx_buf_arr[index];
1737 length = qlcnic_83xx_pktln(sts_data[0]);
1738 cksum = qlcnic_83xx_csum_status(sts_data[1]);
1739 skb = qlcnic_process_rxbuf(adapter, rds_ring, index, cksum);
1740 if (!skb)
1741 return buffer;
1742
1743 if (length > rds_ring->skb_size)
1744 skb_put(skb, rds_ring->skb_size);
1745 else
1746 skb_put(skb, length);
1747
1748 err = qlcnic_check_rx_tagging(adapter, skb, &vid);
1749
1750 if (adapter->rx_mac_learn) {
1751 is_lb_pkt = qlcnic_83xx_is_lb_pkt(sts_data[1], 0);
1752 qlcnic_add_lb_filter(adapter, skb, is_lb_pkt, vid);
1753 }
1754
1755 if (unlikely(err)) {
1756 adapter->stats.rxdropped++;
1757 dev_kfree_skb(skb);
1758 return buffer;
1759 }
1760
1761 skb->protocol = eth_type_trans(skb, netdev);
1762
1763 if (qlcnic_encap_length(sts_data[1]) &&
1764 skb->ip_summed == CHECKSUM_UNNECESSARY) {
1765 skb->csum_level = 1;
1766 adapter->stats.encap_rx_csummed++;
1767 }
1768
1769 if (vid != 0xffff)
1770 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid);
1771
1772 napi_gro_receive(&sds_ring->napi, skb);
1773
1774 adapter->stats.rx_pkts++;
1775 adapter->stats.rxbytes += length;
1776
1777 return buffer;
1778 }
1779
1780 static struct qlcnic_rx_buffer *
qlcnic_83xx_process_lro(struct qlcnic_adapter * adapter,u8 ring,u64 sts_data[])1781 qlcnic_83xx_process_lro(struct qlcnic_adapter *adapter,
1782 u8 ring, u64 sts_data[])
1783 {
1784 struct net_device *netdev = adapter->netdev;
1785 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1786 struct qlcnic_rx_buffer *buffer;
1787 struct sk_buff *skb;
1788 struct qlcnic_host_rds_ring *rds_ring;
1789 struct iphdr *iph;
1790 struct ipv6hdr *ipv6h;
1791 struct tcphdr *th;
1792 bool push;
1793 int l2_hdr_offset, l4_hdr_offset;
1794 int index, is_lb_pkt;
1795 u16 lro_length, length, data_offset, gso_size;
1796 u16 vid = 0xffff;
1797 int err;
1798
1799 if (unlikely(ring >= adapter->max_rds_rings))
1800 return NULL;
1801
1802 rds_ring = &recv_ctx->rds_rings[ring];
1803
1804 index = qlcnic_83xx_hndl(sts_data[0]);
1805 if (unlikely(index >= rds_ring->num_desc))
1806 return NULL;
1807
1808 buffer = &rds_ring->rx_buf_arr[index];
1809
1810 lro_length = qlcnic_83xx_lro_pktln(sts_data[0]);
1811 l2_hdr_offset = qlcnic_83xx_l2_hdr_off(sts_data[1]);
1812 l4_hdr_offset = qlcnic_83xx_l4_hdr_off(sts_data[1]);
1813 push = qlcnic_83xx_is_psh_bit(sts_data[1]);
1814
1815 skb = qlcnic_process_rxbuf(adapter, rds_ring, index, STATUS_CKSUM_OK);
1816 if (!skb)
1817 return buffer;
1818
1819 if (qlcnic_83xx_is_tstamp(sts_data[1]))
1820 data_offset = l4_hdr_offset + QLCNIC_TCP_TS_HDR_SIZE;
1821 else
1822 data_offset = l4_hdr_offset + QLCNIC_TCP_HDR_SIZE;
1823
1824 skb_put(skb, lro_length + data_offset);
1825 skb_pull(skb, l2_hdr_offset);
1826
1827 err = qlcnic_check_rx_tagging(adapter, skb, &vid);
1828
1829 if (adapter->rx_mac_learn) {
1830 is_lb_pkt = qlcnic_83xx_is_lb_pkt(sts_data[1], 1);
1831 qlcnic_add_lb_filter(adapter, skb, is_lb_pkt, vid);
1832 }
1833
1834 if (unlikely(err)) {
1835 adapter->stats.rxdropped++;
1836 dev_kfree_skb(skb);
1837 return buffer;
1838 }
1839
1840 skb->protocol = eth_type_trans(skb, netdev);
1841 if (ntohs(skb->protocol) == ETH_P_IPV6) {
1842 ipv6h = (struct ipv6hdr *)skb->data;
1843 th = (struct tcphdr *)(skb->data + sizeof(struct ipv6hdr));
1844
1845 length = (th->doff << 2) + lro_length;
1846 ipv6h->payload_len = htons(length);
1847 } else {
1848 iph = (struct iphdr *)skb->data;
1849 th = (struct tcphdr *)(skb->data + (iph->ihl << 2));
1850 length = (iph->ihl << 2) + (th->doff << 2) + lro_length;
1851 csum_replace2(&iph->check, iph->tot_len, htons(length));
1852 iph->tot_len = htons(length);
1853 }
1854
1855 th->psh = push;
1856 length = skb->len;
1857
1858 if (adapter->flags & QLCNIC_FW_LRO_MSS_CAP) {
1859 gso_size = qlcnic_83xx_get_lro_sts_mss(sts_data[0]);
1860 skb_shinfo(skb)->gso_size = gso_size;
1861 if (skb->protocol == htons(ETH_P_IPV6))
1862 skb_shinfo(skb)->gso_type = SKB_GSO_TCPV6;
1863 else
1864 skb_shinfo(skb)->gso_type = SKB_GSO_TCPV4;
1865 }
1866
1867 if (vid != 0xffff)
1868 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid);
1869
1870 netif_receive_skb(skb);
1871
1872 adapter->stats.lro_pkts++;
1873 adapter->stats.lrobytes += length;
1874 return buffer;
1875 }
1876
qlcnic_83xx_process_rcv_ring(struct qlcnic_host_sds_ring * sds_ring,int max)1877 static int qlcnic_83xx_process_rcv_ring(struct qlcnic_host_sds_ring *sds_ring,
1878 int max)
1879 {
1880 struct qlcnic_host_rds_ring *rds_ring;
1881 struct qlcnic_adapter *adapter = sds_ring->adapter;
1882 struct list_head *cur;
1883 struct status_desc *desc;
1884 struct qlcnic_rx_buffer *rxbuf = NULL;
1885 u8 ring;
1886 u64 sts_data[2];
1887 int count = 0, opcode;
1888 u32 consumer = sds_ring->consumer;
1889
1890 while (count < max) {
1891 desc = &sds_ring->desc_head[consumer];
1892 sts_data[1] = le64_to_cpu(desc->status_desc_data[1]);
1893 opcode = qlcnic_83xx_opcode(sts_data[1]);
1894 if (!opcode)
1895 break;
1896 sts_data[0] = le64_to_cpu(desc->status_desc_data[0]);
1897 ring = QLCNIC_FETCH_RING_ID(sts_data[0]);
1898
1899 switch (opcode) {
1900 case QLC_83XX_REG_DESC:
1901 rxbuf = qlcnic_83xx_process_rcv(adapter, sds_ring,
1902 ring, sts_data);
1903 break;
1904 case QLC_83XX_LRO_DESC:
1905 rxbuf = qlcnic_83xx_process_lro(adapter, ring,
1906 sts_data);
1907 break;
1908 default:
1909 dev_info(&adapter->pdev->dev,
1910 "Unknown opcode: 0x%x\n", opcode);
1911 goto skip;
1912 }
1913
1914 if (likely(rxbuf))
1915 list_add_tail(&rxbuf->list, &sds_ring->free_list[ring]);
1916 else
1917 adapter->stats.null_rxbuf++;
1918 skip:
1919 desc = &sds_ring->desc_head[consumer];
1920 /* Reset the descriptor */
1921 desc->status_desc_data[1] = 0;
1922 consumer = get_next_index(consumer, sds_ring->num_desc);
1923 count++;
1924 }
1925 for (ring = 0; ring < adapter->max_rds_rings; ring++) {
1926 rds_ring = &adapter->recv_ctx->rds_rings[ring];
1927 if (!list_empty(&sds_ring->free_list[ring])) {
1928 list_for_each(cur, &sds_ring->free_list[ring]) {
1929 rxbuf = list_entry(cur, struct qlcnic_rx_buffer,
1930 list);
1931 qlcnic_alloc_rx_skb(adapter, rds_ring, rxbuf);
1932 }
1933 spin_lock(&rds_ring->lock);
1934 list_splice_tail_init(&sds_ring->free_list[ring],
1935 &rds_ring->free_list);
1936 spin_unlock(&rds_ring->lock);
1937 }
1938 qlcnic_post_rx_buffers_nodb(adapter, rds_ring, ring);
1939 }
1940 if (count) {
1941 sds_ring->consumer = consumer;
1942 writel(consumer, sds_ring->crb_sts_consumer);
1943 }
1944 return count;
1945 }
1946
qlcnic_83xx_msix_sriov_vf_poll(struct napi_struct * napi,int budget)1947 static int qlcnic_83xx_msix_sriov_vf_poll(struct napi_struct *napi, int budget)
1948 {
1949 int tx_complete;
1950 int work_done;
1951 struct qlcnic_host_sds_ring *sds_ring;
1952 struct qlcnic_adapter *adapter;
1953 struct qlcnic_host_tx_ring *tx_ring;
1954
1955 sds_ring = container_of(napi, struct qlcnic_host_sds_ring, napi);
1956 adapter = sds_ring->adapter;
1957 /* tx ring count = 1 */
1958 tx_ring = adapter->tx_ring;
1959
1960 tx_complete = qlcnic_process_cmd_ring(adapter, tx_ring, budget);
1961 work_done = qlcnic_83xx_process_rcv_ring(sds_ring, budget);
1962
1963 /* Check if we need a repoll */
1964 if (!tx_complete)
1965 work_done = budget;
1966
1967 if (work_done < budget) {
1968 napi_complete(&sds_ring->napi);
1969 qlcnic_enable_sds_intr(adapter, sds_ring);
1970 }
1971
1972 return work_done;
1973 }
1974
qlcnic_83xx_poll(struct napi_struct * napi,int budget)1975 static int qlcnic_83xx_poll(struct napi_struct *napi, int budget)
1976 {
1977 int tx_complete;
1978 int work_done;
1979 struct qlcnic_host_sds_ring *sds_ring;
1980 struct qlcnic_adapter *adapter;
1981 struct qlcnic_host_tx_ring *tx_ring;
1982
1983 sds_ring = container_of(napi, struct qlcnic_host_sds_ring, napi);
1984 adapter = sds_ring->adapter;
1985 /* tx ring count = 1 */
1986 tx_ring = adapter->tx_ring;
1987
1988 tx_complete = qlcnic_process_cmd_ring(adapter, tx_ring, budget);
1989 work_done = qlcnic_83xx_process_rcv_ring(sds_ring, budget);
1990
1991 /* Check if we need a repoll */
1992 if (!tx_complete)
1993 work_done = budget;
1994
1995 if (work_done < budget) {
1996 napi_complete(&sds_ring->napi);
1997 qlcnic_enable_sds_intr(adapter, sds_ring);
1998 }
1999
2000 return work_done;
2001 }
2002
qlcnic_83xx_msix_tx_poll(struct napi_struct * napi,int budget)2003 static int qlcnic_83xx_msix_tx_poll(struct napi_struct *napi, int budget)
2004 {
2005 int work_done;
2006 struct qlcnic_host_tx_ring *tx_ring;
2007 struct qlcnic_adapter *adapter;
2008
2009 budget = QLCNIC_TX_POLL_BUDGET;
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(&sds_ring->napi);
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 NAPI_POLL_WEIGHT);
2117 else
2118 netif_napi_add(netdev, &sds_ring->napi,
2119 qlcnic_83xx_msix_sriov_vf_poll,
2120 NAPI_POLL_WEIGHT);
2121
2122 } else {
2123 netif_napi_add(netdev, &sds_ring->napi,
2124 qlcnic_83xx_poll,
2125 NAPI_POLL_WEIGHT);
2126 }
2127 }
2128
2129 if (qlcnic_alloc_tx_rings(adapter, netdev)) {
2130 qlcnic_free_sds_rings(recv_ctx);
2131 return -ENOMEM;
2132 }
2133
2134 if ((adapter->flags & QLCNIC_MSIX_ENABLED) &&
2135 !(adapter->flags & QLCNIC_TX_INTR_SHARED)) {
2136 for (ring = 0; ring < adapter->drv_tx_rings; ring++) {
2137 tx_ring = &adapter->tx_ring[ring];
2138 netif_napi_add(netdev, &tx_ring->napi,
2139 qlcnic_83xx_msix_tx_poll,
2140 NAPI_POLL_WEIGHT);
2141 }
2142 }
2143
2144 return 0;
2145 }
2146
qlcnic_83xx_napi_del(struct qlcnic_adapter * adapter)2147 void qlcnic_83xx_napi_del(struct qlcnic_adapter *adapter)
2148 {
2149 int ring;
2150 struct qlcnic_host_sds_ring *sds_ring;
2151 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
2152 struct qlcnic_host_tx_ring *tx_ring;
2153
2154 for (ring = 0; ring < adapter->drv_sds_rings; ring++) {
2155 sds_ring = &recv_ctx->sds_rings[ring];
2156 netif_napi_del(&sds_ring->napi);
2157 }
2158
2159 qlcnic_free_sds_rings(adapter->recv_ctx);
2160
2161 if ((adapter->flags & QLCNIC_MSIX_ENABLED) &&
2162 !(adapter->flags & QLCNIC_TX_INTR_SHARED)) {
2163 for (ring = 0; ring < adapter->drv_tx_rings; ring++) {
2164 tx_ring = &adapter->tx_ring[ring];
2165 netif_napi_del(&tx_ring->napi);
2166 }
2167 }
2168
2169 qlcnic_free_tx_rings(adapter);
2170 }
2171
qlcnic_83xx_process_rcv_diag(struct qlcnic_adapter * adapter,int ring,u64 sts_data[])2172 static void qlcnic_83xx_process_rcv_diag(struct qlcnic_adapter *adapter,
2173 int ring, u64 sts_data[])
2174 {
2175 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
2176 struct sk_buff *skb;
2177 struct qlcnic_host_rds_ring *rds_ring;
2178 int index, length;
2179
2180 if (unlikely(ring >= adapter->max_rds_rings))
2181 return;
2182
2183 rds_ring = &recv_ctx->rds_rings[ring];
2184 index = qlcnic_83xx_hndl(sts_data[0]);
2185 if (unlikely(index >= rds_ring->num_desc))
2186 return;
2187
2188 length = qlcnic_83xx_pktln(sts_data[0]);
2189
2190 skb = qlcnic_process_rxbuf(adapter, rds_ring, index, STATUS_CKSUM_OK);
2191 if (!skb)
2192 return;
2193
2194 if (length > rds_ring->skb_size)
2195 skb_put(skb, rds_ring->skb_size);
2196 else
2197 skb_put(skb, length);
2198
2199 if (!qlcnic_check_loopback_buff(skb->data, adapter->mac_addr))
2200 adapter->ahw->diag_cnt++;
2201 else
2202 dump_skb(skb, adapter);
2203
2204 dev_kfree_skb_any(skb);
2205 return;
2206 }
2207
qlcnic_83xx_process_rcv_ring_diag(struct qlcnic_host_sds_ring * sds_ring)2208 void qlcnic_83xx_process_rcv_ring_diag(struct qlcnic_host_sds_ring *sds_ring)
2209 {
2210 struct qlcnic_adapter *adapter = sds_ring->adapter;
2211 struct status_desc *desc;
2212 u64 sts_data[2];
2213 int ring, opcode;
2214 u32 consumer = sds_ring->consumer;
2215
2216 desc = &sds_ring->desc_head[consumer];
2217 sts_data[0] = le64_to_cpu(desc->status_desc_data[0]);
2218 sts_data[1] = le64_to_cpu(desc->status_desc_data[1]);
2219 opcode = qlcnic_83xx_opcode(sts_data[1]);
2220 if (!opcode)
2221 return;
2222
2223 ring = QLCNIC_FETCH_RING_ID(qlcnic_83xx_hndl(sts_data[0]));
2224 qlcnic_83xx_process_rcv_diag(adapter, ring, sts_data);
2225 desc = &sds_ring->desc_head[consumer];
2226 desc->status_desc_data[0] = cpu_to_le64(STATUS_OWNER_PHANTOM);
2227 consumer = get_next_index(consumer, sds_ring->num_desc);
2228 sds_ring->consumer = consumer;
2229 writel(consumer, sds_ring->crb_sts_consumer);
2230 }
2231