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 
14 #include "qlcnic.h"
15 
16 #define QLCNIC_TX_ETHER_PKT		0x01
17 #define QLCNIC_TX_TCP_PKT		0x02
18 #define QLCNIC_TX_UDP_PKT		0x03
19 #define QLCNIC_TX_IP_PKT		0x04
20 #define QLCNIC_TX_TCP_LSO		0x05
21 #define QLCNIC_TX_TCP_LSO6		0x06
22 #define QLCNIC_TX_ENCAP_PKT		0x07
23 #define QLCNIC_TX_ENCAP_LSO		0x08
24 #define QLCNIC_TX_TCPV6_PKT		0x0b
25 #define QLCNIC_TX_UDPV6_PKT		0x0c
26 
27 #define QLCNIC_FLAGS_VLAN_TAGGED	0x10
28 #define QLCNIC_FLAGS_VLAN_OOB		0x40
29 
30 #define qlcnic_set_tx_vlan_tci(cmd_desc, v)	\
31 	(cmd_desc)->vlan_TCI = cpu_to_le16(v);
32 #define qlcnic_set_cmd_desc_port(cmd_desc, var)	\
33 	((cmd_desc)->port_ctxid |= ((var) & 0x0F))
34 #define qlcnic_set_cmd_desc_ctxid(cmd_desc, var)	\
35 	((cmd_desc)->port_ctxid |= ((var) << 4 & 0xF0))
36 
37 #define qlcnic_set_tx_port(_desc, _port) \
38 	((_desc)->port_ctxid = ((_port) & 0xf) | (((_port) << 4) & 0xf0))
39 
40 #define qlcnic_set_tx_flags_opcode(_desc, _flags, _opcode) \
41 	((_desc)->flags_opcode |= \
42 	cpu_to_le16(((_flags) & 0x7f) | (((_opcode) & 0x3f) << 7)))
43 
44 #define qlcnic_set_tx_frags_len(_desc, _frags, _len) \
45 	((_desc)->nfrags__length = \
46 	cpu_to_le32(((_frags) & 0xff) | (((_len) & 0xffffff) << 8)))
47 
48 /* owner bits of status_desc */
49 #define STATUS_OWNER_HOST	(0x1ULL << 56)
50 #define STATUS_OWNER_PHANTOM	(0x2ULL << 56)
51 
52 /* Status descriptor:
53    0-3 port, 4-7 status, 8-11 type, 12-27 total_length
54    28-43 reference_handle, 44-47 protocol, 48-52 pkt_offset
55    53-55 desc_cnt, 56-57 owner, 58-63 opcode
56  */
57 #define qlcnic_get_sts_port(sts_data)	\
58 	((sts_data) & 0x0F)
59 #define qlcnic_get_sts_status(sts_data)	\
60 	(((sts_data) >> 4) & 0x0F)
61 #define qlcnic_get_sts_type(sts_data)	\
62 	(((sts_data) >> 8) & 0x0F)
63 #define qlcnic_get_sts_totallength(sts_data)	\
64 	(((sts_data) >> 12) & 0xFFFF)
65 #define qlcnic_get_sts_refhandle(sts_data)	\
66 	(((sts_data) >> 28) & 0xFFFF)
67 #define qlcnic_get_sts_prot(sts_data)	\
68 	(((sts_data) >> 44) & 0x0F)
69 #define qlcnic_get_sts_pkt_offset(sts_data)	\
70 	(((sts_data) >> 48) & 0x1F)
71 #define qlcnic_get_sts_desc_cnt(sts_data)	\
72 	(((sts_data) >> 53) & 0x7)
73 #define qlcnic_get_sts_opcode(sts_data)	\
74 	(((sts_data) >> 58) & 0x03F)
75 
76 #define qlcnic_get_lro_sts_refhandle(sts_data) 	\
77 	((sts_data) & 0x07FFF)
78 #define qlcnic_get_lro_sts_length(sts_data)	\
79 	(((sts_data) >> 16) & 0x0FFFF)
80 #define qlcnic_get_lro_sts_l2_hdr_offset(sts_data)	\
81 	(((sts_data) >> 32) & 0x0FF)
82 #define qlcnic_get_lro_sts_l4_hdr_offset(sts_data)	\
83 	(((sts_data) >> 40) & 0x0FF)
84 #define qlcnic_get_lro_sts_timestamp(sts_data)	\
85 	(((sts_data) >> 48) & 0x1)
86 #define qlcnic_get_lro_sts_type(sts_data)	\
87 	(((sts_data) >> 49) & 0x7)
88 #define qlcnic_get_lro_sts_push_flag(sts_data)		\
89 	(((sts_data) >> 52) & 0x1)
90 #define qlcnic_get_lro_sts_seq_number(sts_data)		\
91 	((sts_data) & 0x0FFFFFFFF)
92 #define qlcnic_get_lro_sts_mss(sts_data1)		\
93 	((sts_data1 >> 32) & 0x0FFFF)
94 
95 #define qlcnic_83xx_get_lro_sts_mss(sts) ((sts) & 0xffff)
96 
97 /* opcode field in status_desc */
98 #define QLCNIC_SYN_OFFLOAD	0x03
99 #define QLCNIC_RXPKT_DESC  	0x04
100 #define QLCNIC_OLD_RXPKT_DESC	0x3f
101 #define QLCNIC_RESPONSE_DESC	0x05
102 #define QLCNIC_LRO_DESC  	0x12
103 
104 #define QLCNIC_TX_POLL_BUDGET		128
105 #define QLCNIC_TCP_HDR_SIZE		20
106 #define QLCNIC_TCP_TS_OPTION_SIZE	12
107 #define QLCNIC_FETCH_RING_ID(handle)	((handle) >> 63)
108 #define QLCNIC_DESC_OWNER_FW		cpu_to_le64(STATUS_OWNER_PHANTOM)
109 
110 #define QLCNIC_TCP_TS_HDR_SIZE (QLCNIC_TCP_HDR_SIZE + QLCNIC_TCP_TS_OPTION_SIZE)
111 
112 /* for status field in status_desc */
113 #define STATUS_CKSUM_LOOP	0
114 #define STATUS_CKSUM_OK		2
115 
116 #define qlcnic_83xx_pktln(sts)		((sts >> 32) & 0x3FFF)
117 #define qlcnic_83xx_hndl(sts)		((sts >> 48) & 0x7FFF)
118 #define qlcnic_83xx_csum_status(sts)	((sts >> 39) & 7)
119 #define qlcnic_83xx_opcode(sts)	((sts >> 42) & 0xF)
120 #define qlcnic_83xx_vlan_tag(sts)	(((sts) >> 48) & 0xFFFF)
121 #define qlcnic_83xx_lro_pktln(sts)	(((sts) >> 32) & 0x3FFF)
122 #define qlcnic_83xx_l2_hdr_off(sts)	(((sts) >> 16) & 0xFF)
123 #define qlcnic_83xx_l4_hdr_off(sts)	(((sts) >> 24) & 0xFF)
124 #define qlcnic_83xx_pkt_cnt(sts)	(((sts) >> 16) & 0x7)
125 #define qlcnic_83xx_is_tstamp(sts)	(((sts) >> 40) & 1)
126 #define qlcnic_83xx_is_psh_bit(sts)	(((sts) >> 41) & 1)
127 #define qlcnic_83xx_is_ip_align(sts)	(((sts) >> 46) & 1)
128 #define qlcnic_83xx_has_vlan_tag(sts)	(((sts) >> 47) & 1)
129 
130 static int qlcnic_process_rcv_ring(struct qlcnic_host_sds_ring *sds_ring,
131 				   int max);
132 
133 static struct sk_buff *qlcnic_process_rxbuf(struct qlcnic_adapter *,
134 					    struct qlcnic_host_rds_ring *,
135 					    u16, u16);
136 
137 static inline u8 qlcnic_mac_hash(u64 mac, u16 vlan)
138 {
139 	return (u8)((mac & 0xff) ^ ((mac >> 40) & 0xff) ^ (vlan & 0xff));
140 }
141 
142 static inline u32 qlcnic_get_ref_handle(struct qlcnic_adapter *adapter,
143 					u16 handle, u8 ring_id)
144 {
145 	if (qlcnic_83xx_check(adapter))
146 		return handle | (ring_id << 15);
147 	else
148 		return handle;
149 }
150 
151 static inline int qlcnic_82xx_is_lb_pkt(u64 sts_data)
152 {
153 	return (qlcnic_get_sts_status(sts_data) == STATUS_CKSUM_LOOP) ? 1 : 0;
154 }
155 
156 static void qlcnic_delete_rx_list_mac(struct qlcnic_adapter *adapter,
157 				      struct qlcnic_filter *fil,
158 				      void *addr, u16 vlan_id)
159 {
160 	int ret;
161 	u8 op;
162 
163 	op = vlan_id ? QLCNIC_MAC_VLAN_ADD : QLCNIC_MAC_ADD;
164 	ret = qlcnic_sre_macaddr_change(adapter, addr, vlan_id, op);
165 	if (ret)
166 		return;
167 
168 	op = vlan_id ? QLCNIC_MAC_VLAN_DEL : QLCNIC_MAC_DEL;
169 	ret = qlcnic_sre_macaddr_change(adapter, addr, vlan_id, op);
170 	if (!ret) {
171 		hlist_del(&fil->fnode);
172 		adapter->rx_fhash.fnum--;
173 	}
174 }
175 
176 static struct qlcnic_filter *qlcnic_find_mac_filter(struct hlist_head *head,
177 						    void *addr, u16 vlan_id)
178 {
179 	struct qlcnic_filter *tmp_fil = NULL;
180 	struct hlist_node *n;
181 
182 	hlist_for_each_entry_safe(tmp_fil, n, head, fnode) {
183 		if (ether_addr_equal(tmp_fil->faddr, addr) &&
184 		    tmp_fil->vlan_id == vlan_id)
185 			return tmp_fil;
186 	}
187 
188 	return NULL;
189 }
190 
191 static void qlcnic_add_lb_filter(struct qlcnic_adapter *adapter,
192 				 struct sk_buff *skb, int loopback_pkt, u16 vlan_id)
193 {
194 	struct ethhdr *phdr = (struct ethhdr *)(skb->data);
195 	struct qlcnic_filter *fil, *tmp_fil;
196 	struct hlist_head *head;
197 	unsigned long time;
198 	u64 src_addr = 0;
199 	u8 hindex, op;
200 	int ret;
201 
202 	if (!qlcnic_sriov_pf_check(adapter) || (vlan_id == 0xffff))
203 		vlan_id = 0;
204 
205 	memcpy(&src_addr, phdr->h_source, ETH_ALEN);
206 	hindex = qlcnic_mac_hash(src_addr, vlan_id) &
207 		 (adapter->fhash.fbucket_size - 1);
208 
209 	if (loopback_pkt) {
210 		if (adapter->rx_fhash.fnum >= adapter->rx_fhash.fmax)
211 			return;
212 
213 		head = &(adapter->rx_fhash.fhead[hindex]);
214 
215 		tmp_fil = qlcnic_find_mac_filter(head, &src_addr, vlan_id);
216 		if (tmp_fil) {
217 			time = tmp_fil->ftime;
218 			if (time_after(jiffies, QLCNIC_READD_AGE * HZ + time))
219 				tmp_fil->ftime = jiffies;
220 			return;
221 		}
222 
223 		fil = kzalloc(sizeof(struct qlcnic_filter), GFP_ATOMIC);
224 		if (!fil)
225 			return;
226 
227 		fil->ftime = jiffies;
228 		memcpy(fil->faddr, &src_addr, ETH_ALEN);
229 		fil->vlan_id = vlan_id;
230 		spin_lock(&adapter->rx_mac_learn_lock);
231 		hlist_add_head(&(fil->fnode), head);
232 		adapter->rx_fhash.fnum++;
233 		spin_unlock(&adapter->rx_mac_learn_lock);
234 	} else {
235 		head = &adapter->fhash.fhead[hindex];
236 
237 		spin_lock(&adapter->mac_learn_lock);
238 
239 		tmp_fil = qlcnic_find_mac_filter(head, &src_addr, vlan_id);
240 		if (tmp_fil) {
241 			op = vlan_id ? QLCNIC_MAC_VLAN_DEL : QLCNIC_MAC_DEL;
242 			ret = qlcnic_sre_macaddr_change(adapter,
243 							(u8 *)&src_addr,
244 							vlan_id, op);
245 			if (!ret) {
246 				hlist_del(&tmp_fil->fnode);
247 				adapter->fhash.fnum--;
248 			}
249 
250 			spin_unlock(&adapter->mac_learn_lock);
251 
252 			return;
253 		}
254 
255 		spin_unlock(&adapter->mac_learn_lock);
256 
257 		head = &adapter->rx_fhash.fhead[hindex];
258 
259 		spin_lock(&adapter->rx_mac_learn_lock);
260 
261 		tmp_fil = qlcnic_find_mac_filter(head, &src_addr, vlan_id);
262 		if (tmp_fil)
263 			qlcnic_delete_rx_list_mac(adapter, tmp_fil, &src_addr,
264 						  vlan_id);
265 
266 		spin_unlock(&adapter->rx_mac_learn_lock);
267 	}
268 }
269 
270 void qlcnic_82xx_change_filter(struct qlcnic_adapter *adapter, u64 *uaddr,
271 			       u16 vlan_id)
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 	struct qlcnic_host_tx_ring *tx_ring = adapter->tx_ring;
278 	u32 producer;
279 	u64 word;
280 
281 	producer = tx_ring->producer;
282 	hwdesc = &tx_ring->desc_head[tx_ring->producer];
283 
284 	req = (struct qlcnic_nic_req *)hwdesc;
285 	memset(req, 0, sizeof(struct qlcnic_nic_req));
286 	req->qhdr = cpu_to_le64(QLCNIC_REQUEST << 23);
287 
288 	word = QLCNIC_MAC_EVENT | ((u64)(adapter->portnum) << 16);
289 	req->req_hdr = cpu_to_le64(word);
290 
291 	mac_req = (struct qlcnic_mac_req *)&(req->words[0]);
292 	mac_req->op = vlan_id ? QLCNIC_MAC_VLAN_ADD : QLCNIC_MAC_ADD;
293 	memcpy(mac_req->mac_addr, uaddr, ETH_ALEN);
294 
295 	vlan_req = (struct qlcnic_vlan_req *)&req->words[1];
296 	vlan_req->vlan_id = cpu_to_le16(vlan_id);
297 
298 	tx_ring->producer = get_next_index(producer, tx_ring->num_desc);
299 	smp_mb();
300 }
301 
302 static void qlcnic_send_filter(struct qlcnic_adapter *adapter,
303 			       struct cmd_desc_type0 *first_desc,
304 			       struct sk_buff *skb)
305 {
306 	struct vlan_ethhdr *vh = (struct vlan_ethhdr *)(skb->data);
307 	struct ethhdr *phdr = (struct ethhdr *)(skb->data);
308 	u16 protocol = ntohs(skb->protocol);
309 	struct qlcnic_filter *fil, *tmp_fil;
310 	struct hlist_head *head;
311 	struct hlist_node *n;
312 	u64 src_addr = 0;
313 	u16 vlan_id = 0;
314 	u8 hindex, hval;
315 
316 	if (ether_addr_equal(phdr->h_source, adapter->mac_addr))
317 		return;
318 
319 	if (adapter->flags & QLCNIC_VLAN_FILTERING) {
320 		if (protocol == ETH_P_8021Q) {
321 			vh = (struct vlan_ethhdr *)skb->data;
322 			vlan_id = ntohs(vh->h_vlan_TCI);
323 		} else if (vlan_tx_tag_present(skb)) {
324 			vlan_id = vlan_tx_tag_get(skb);
325 		}
326 	}
327 
328 	memcpy(&src_addr, phdr->h_source, ETH_ALEN);
329 	hval = qlcnic_mac_hash(src_addr, vlan_id);
330 	hindex = hval & (adapter->fhash.fbucket_size - 1);
331 	head = &(adapter->fhash.fhead[hindex]);
332 
333 	hlist_for_each_entry_safe(tmp_fil, n, head, fnode) {
334 		if (ether_addr_equal(tmp_fil->faddr, (u8 *)&src_addr) &&
335 		    tmp_fil->vlan_id == vlan_id) {
336 			if (jiffies > (QLCNIC_READD_AGE * HZ + tmp_fil->ftime))
337 				qlcnic_change_filter(adapter, &src_addr,
338 						     vlan_id);
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);
354 	fil->ftime = jiffies;
355 	fil->vlan_id = vlan_id;
356 	memcpy(fil->faddr, &src_addr, ETH_ALEN);
357 	spin_lock(&adapter->mac_learn_lock);
358 	hlist_add_head(&(fil->fnode), head);
359 	adapter->fhash.fnum++;
360 	spin_unlock(&adapter->mac_learn_lock);
361 }
362 
363 #define QLCNIC_ENCAP_VXLAN_PKT		BIT_0
364 #define QLCNIC_ENCAP_OUTER_L3_IP6	BIT_1
365 #define QLCNIC_ENCAP_INNER_L3_IP6	BIT_2
366 #define QLCNIC_ENCAP_INNER_L4_UDP	BIT_3
367 #define QLCNIC_ENCAP_DO_L3_CSUM		BIT_4
368 #define QLCNIC_ENCAP_DO_L4_CSUM		BIT_5
369 
370 static int qlcnic_tx_encap_pkt(struct qlcnic_adapter *adapter,
371 			       struct cmd_desc_type0 *first_desc,
372 			       struct sk_buff *skb,
373 			       struct qlcnic_host_tx_ring *tx_ring)
374 {
375 	u8 opcode = 0, inner_hdr_len = 0, outer_hdr_len = 0, total_hdr_len = 0;
376 	int copied, copy_len, descr_size;
377 	u32 producer = tx_ring->producer;
378 	struct cmd_desc_type0 *hwdesc;
379 	u16 flags = 0, encap_descr = 0;
380 
381 	opcode = QLCNIC_TX_ETHER_PKT;
382 	encap_descr = QLCNIC_ENCAP_VXLAN_PKT;
383 
384 	if (skb_is_gso(skb)) {
385 		inner_hdr_len = skb_inner_transport_header(skb) +
386 				inner_tcp_hdrlen(skb) -
387 				skb_inner_mac_header(skb);
388 
389 		/* VXLAN header size = 8 */
390 		outer_hdr_len = skb_transport_offset(skb) + 8 +
391 				sizeof(struct udphdr);
392 		first_desc->outer_hdr_length = outer_hdr_len;
393 		total_hdr_len = inner_hdr_len + outer_hdr_len;
394 		encap_descr |= QLCNIC_ENCAP_DO_L3_CSUM |
395 			       QLCNIC_ENCAP_DO_L4_CSUM;
396 		first_desc->mss = cpu_to_le16(skb_shinfo(skb)->gso_size);
397 		first_desc->hdr_length = inner_hdr_len;
398 
399 		/* Copy inner and outer headers in Tx descriptor(s)
400 		 * If total_hdr_len > cmd_desc_type0, use multiple
401 		 * descriptors
402 		 */
403 		copied = 0;
404 		descr_size = (int)sizeof(struct cmd_desc_type0);
405 		while (copied < total_hdr_len) {
406 			copy_len = min(descr_size, (total_hdr_len - copied));
407 			hwdesc = &tx_ring->desc_head[producer];
408 			tx_ring->cmd_buf_arr[producer].skb = NULL;
409 			skb_copy_from_linear_data_offset(skb, copied,
410 							 (char *)hwdesc,
411 							 copy_len);
412 			copied += copy_len;
413 			producer = get_next_index(producer, tx_ring->num_desc);
414 		}
415 
416 		tx_ring->producer = producer;
417 
418 		/* Make sure updated tx_ring->producer is visible
419 		 * for qlcnic_tx_avail()
420 		 */
421 		smp_mb();
422 		adapter->stats.encap_lso_frames++;
423 
424 		opcode = QLCNIC_TX_ENCAP_LSO;
425 	} else if (skb->ip_summed == CHECKSUM_PARTIAL) {
426 		if (inner_ip_hdr(skb)->version == 6) {
427 			if (inner_ipv6_hdr(skb)->nexthdr == IPPROTO_UDP)
428 				encap_descr |= QLCNIC_ENCAP_INNER_L4_UDP;
429 		} else {
430 			if (inner_ip_hdr(skb)->protocol == IPPROTO_UDP)
431 				encap_descr |= QLCNIC_ENCAP_INNER_L4_UDP;
432 		}
433 
434 		adapter->stats.encap_tx_csummed++;
435 		opcode = QLCNIC_TX_ENCAP_PKT;
436 	}
437 
438 	/* Prepare first 16 bits of byte offset 16 of Tx descriptor */
439 	if (ip_hdr(skb)->version == 6)
440 		encap_descr |= QLCNIC_ENCAP_OUTER_L3_IP6;
441 
442 	/* outer IP header's size in 32bit words size*/
443 	encap_descr |= (skb_network_header_len(skb) >> 2) << 6;
444 
445 	/* outer IP header offset */
446 	encap_descr |= skb_network_offset(skb) << 10;
447 	first_desc->encap_descr = cpu_to_le16(encap_descr);
448 
449 	first_desc->tcp_hdr_offset = skb_inner_transport_header(skb) -
450 				     skb->data;
451 	first_desc->ip_hdr_offset = skb_inner_network_offset(skb);
452 
453 	qlcnic_set_tx_flags_opcode(first_desc, flags, opcode);
454 
455 	return 0;
456 }
457 
458 static int qlcnic_tx_pkt(struct qlcnic_adapter *adapter,
459 			 struct cmd_desc_type0 *first_desc, struct sk_buff *skb,
460 			 struct qlcnic_host_tx_ring *tx_ring)
461 {
462 	u8 l4proto, opcode = 0, hdr_len = 0;
463 	u16 flags = 0, vlan_tci = 0;
464 	int copied, offset, copy_len, size;
465 	struct cmd_desc_type0 *hwdesc;
466 	struct vlan_ethhdr *vh;
467 	u16 protocol = ntohs(skb->protocol);
468 	u32 producer = tx_ring->producer;
469 
470 	if (protocol == ETH_P_8021Q) {
471 		vh = (struct vlan_ethhdr *)skb->data;
472 		flags = QLCNIC_FLAGS_VLAN_TAGGED;
473 		vlan_tci = ntohs(vh->h_vlan_TCI);
474 		protocol = ntohs(vh->h_vlan_encapsulated_proto);
475 	} else if (vlan_tx_tag_present(skb)) {
476 		flags = QLCNIC_FLAGS_VLAN_OOB;
477 		vlan_tci = vlan_tx_tag_get(skb);
478 	}
479 	if (unlikely(adapter->tx_pvid)) {
480 		if (vlan_tci && !(adapter->flags & QLCNIC_TAGGING_ENABLED))
481 			return -EIO;
482 		if (vlan_tci && (adapter->flags & QLCNIC_TAGGING_ENABLED))
483 			goto set_flags;
484 
485 		flags = QLCNIC_FLAGS_VLAN_OOB;
486 		vlan_tci = adapter->tx_pvid;
487 	}
488 set_flags:
489 	qlcnic_set_tx_vlan_tci(first_desc, vlan_tci);
490 	qlcnic_set_tx_flags_opcode(first_desc, flags, opcode);
491 
492 	if (*(skb->data) & BIT_0) {
493 		flags |= BIT_0;
494 		memcpy(&first_desc->eth_addr, skb->data, ETH_ALEN);
495 	}
496 	opcode = QLCNIC_TX_ETHER_PKT;
497 	if (skb_is_gso(skb)) {
498 		hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
499 		first_desc->mss = cpu_to_le16(skb_shinfo(skb)->gso_size);
500 		first_desc->hdr_length = hdr_len;
501 		opcode = (protocol == ETH_P_IPV6) ? QLCNIC_TX_TCP_LSO6 :
502 						    QLCNIC_TX_TCP_LSO;
503 
504 		/* For LSO, we need to copy the MAC/IP/TCP headers into
505 		* the descriptor ring */
506 		copied = 0;
507 		offset = 2;
508 
509 		if (flags & QLCNIC_FLAGS_VLAN_OOB) {
510 			first_desc->hdr_length += VLAN_HLEN;
511 			first_desc->tcp_hdr_offset = VLAN_HLEN;
512 			first_desc->ip_hdr_offset = VLAN_HLEN;
513 
514 			/* Only in case of TSO on vlan device */
515 			flags |= QLCNIC_FLAGS_VLAN_TAGGED;
516 
517 			/* Create a TSO vlan header template for firmware */
518 			hwdesc = &tx_ring->desc_head[producer];
519 			tx_ring->cmd_buf_arr[producer].skb = NULL;
520 
521 			copy_len = min((int)sizeof(struct cmd_desc_type0) -
522 				       offset, hdr_len + VLAN_HLEN);
523 
524 			vh = (struct vlan_ethhdr *)((char *) hwdesc + 2);
525 			skb_copy_from_linear_data(skb, vh, 12);
526 			vh->h_vlan_proto = htons(ETH_P_8021Q);
527 			vh->h_vlan_TCI = htons(vlan_tci);
528 
529 			skb_copy_from_linear_data_offset(skb, 12,
530 							 (char *)vh + 16,
531 							 copy_len - 16);
532 			copied = copy_len - VLAN_HLEN;
533 			offset = 0;
534 			producer = get_next_index(producer, tx_ring->num_desc);
535 		}
536 
537 		while (copied < hdr_len) {
538 			size = (int)sizeof(struct cmd_desc_type0) - offset;
539 			copy_len = min(size, (hdr_len - copied));
540 			hwdesc = &tx_ring->desc_head[producer];
541 			tx_ring->cmd_buf_arr[producer].skb = NULL;
542 			skb_copy_from_linear_data_offset(skb, copied,
543 							 (char *)hwdesc +
544 							 offset, copy_len);
545 			copied += copy_len;
546 			offset = 0;
547 			producer = get_next_index(producer, tx_ring->num_desc);
548 		}
549 
550 		tx_ring->producer = producer;
551 		smp_mb();
552 		adapter->stats.lso_frames++;
553 
554 	} else if (skb->ip_summed == CHECKSUM_PARTIAL) {
555 		if (protocol == ETH_P_IP) {
556 			l4proto = ip_hdr(skb)->protocol;
557 
558 			if (l4proto == IPPROTO_TCP)
559 				opcode = QLCNIC_TX_TCP_PKT;
560 			else if (l4proto == IPPROTO_UDP)
561 				opcode = QLCNIC_TX_UDP_PKT;
562 		} else if (protocol == ETH_P_IPV6) {
563 			l4proto = ipv6_hdr(skb)->nexthdr;
564 
565 			if (l4proto == IPPROTO_TCP)
566 				opcode = QLCNIC_TX_TCPV6_PKT;
567 			else if (l4proto == IPPROTO_UDP)
568 				opcode = QLCNIC_TX_UDPV6_PKT;
569 		}
570 	}
571 	first_desc->tcp_hdr_offset += skb_transport_offset(skb);
572 	first_desc->ip_hdr_offset += skb_network_offset(skb);
573 	qlcnic_set_tx_flags_opcode(first_desc, flags, opcode);
574 
575 	return 0;
576 }
577 
578 static int qlcnic_map_tx_skb(struct pci_dev *pdev, struct sk_buff *skb,
579 			     struct qlcnic_cmd_buffer *pbuf)
580 {
581 	struct qlcnic_skb_frag *nf;
582 	struct skb_frag_struct *frag;
583 	int i, nr_frags;
584 	dma_addr_t map;
585 
586 	nr_frags = skb_shinfo(skb)->nr_frags;
587 	nf = &pbuf->frag_array[0];
588 
589 	map = pci_map_single(pdev, skb->data, skb_headlen(skb),
590 			     PCI_DMA_TODEVICE);
591 	if (pci_dma_mapping_error(pdev, map))
592 		goto out_err;
593 
594 	nf->dma = map;
595 	nf->length = skb_headlen(skb);
596 
597 	for (i = 0; i < nr_frags; i++) {
598 		frag = &skb_shinfo(skb)->frags[i];
599 		nf = &pbuf->frag_array[i+1];
600 		map = skb_frag_dma_map(&pdev->dev, frag, 0, skb_frag_size(frag),
601 				       DMA_TO_DEVICE);
602 		if (dma_mapping_error(&pdev->dev, map))
603 			goto unwind;
604 
605 		nf->dma = map;
606 		nf->length = skb_frag_size(frag);
607 	}
608 
609 	return 0;
610 
611 unwind:
612 	while (--i >= 0) {
613 		nf = &pbuf->frag_array[i+1];
614 		pci_unmap_page(pdev, nf->dma, nf->length, PCI_DMA_TODEVICE);
615 	}
616 
617 	nf = &pbuf->frag_array[0];
618 	pci_unmap_single(pdev, nf->dma, skb_headlen(skb), PCI_DMA_TODEVICE);
619 
620 out_err:
621 	return -ENOMEM;
622 }
623 
624 static void qlcnic_unmap_buffers(struct pci_dev *pdev, struct sk_buff *skb,
625 				 struct qlcnic_cmd_buffer *pbuf)
626 {
627 	struct qlcnic_skb_frag *nf = &pbuf->frag_array[0];
628 	int i, nr_frags = skb_shinfo(skb)->nr_frags;
629 
630 	for (i = 0; i < nr_frags; i++) {
631 		nf = &pbuf->frag_array[i+1];
632 		pci_unmap_page(pdev, nf->dma, nf->length, PCI_DMA_TODEVICE);
633 	}
634 
635 	nf = &pbuf->frag_array[0];
636 	pci_unmap_single(pdev, nf->dma, skb_headlen(skb), PCI_DMA_TODEVICE);
637 	pbuf->skb = NULL;
638 }
639 
640 static inline void qlcnic_clear_cmddesc(u64 *desc)
641 {
642 	desc[0] = 0ULL;
643 	desc[2] = 0ULL;
644 	desc[7] = 0ULL;
645 }
646 
647 netdev_tx_t qlcnic_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
648 {
649 	struct qlcnic_adapter *adapter = netdev_priv(netdev);
650 	struct qlcnic_host_tx_ring *tx_ring;
651 	struct qlcnic_cmd_buffer *pbuf;
652 	struct qlcnic_skb_frag *buffrag;
653 	struct cmd_desc_type0 *hwdesc, *first_desc;
654 	struct pci_dev *pdev;
655 	struct ethhdr *phdr;
656 	int i, k, frag_count, delta = 0;
657 	u32 producer, num_txd;
658 	u16 protocol;
659 	bool l4_is_udp = false;
660 
661 	if (!test_bit(__QLCNIC_DEV_UP, &adapter->state)) {
662 		netif_tx_stop_all_queues(netdev);
663 		return NETDEV_TX_BUSY;
664 	}
665 
666 	if (adapter->flags & QLCNIC_MACSPOOF) {
667 		phdr = (struct ethhdr *)skb->data;
668 		if (!ether_addr_equal(phdr->h_source, adapter->mac_addr))
669 			goto drop_packet;
670 	}
671 
672 	tx_ring = &adapter->tx_ring[skb_get_queue_mapping(skb)];
673 	num_txd = tx_ring->num_desc;
674 
675 	frag_count = skb_shinfo(skb)->nr_frags + 1;
676 
677 	/* 14 frags supported for normal packet and
678 	 * 32 frags supported for TSO packet
679 	 */
680 	if (!skb_is_gso(skb) && frag_count > QLCNIC_MAX_FRAGS_PER_TX) {
681 		for (i = 0; i < (frag_count - QLCNIC_MAX_FRAGS_PER_TX); i++)
682 			delta += skb_frag_size(&skb_shinfo(skb)->frags[i]);
683 
684 		if (!__pskb_pull_tail(skb, delta))
685 			goto drop_packet;
686 
687 		frag_count = 1 + skb_shinfo(skb)->nr_frags;
688 	}
689 
690 	if (unlikely(qlcnic_tx_avail(tx_ring) <= TX_STOP_THRESH)) {
691 		netif_tx_stop_queue(tx_ring->txq);
692 		if (qlcnic_tx_avail(tx_ring) > TX_STOP_THRESH) {
693 			netif_tx_start_queue(tx_ring->txq);
694 		} else {
695 			tx_ring->tx_stats.xmit_off++;
696 			return NETDEV_TX_BUSY;
697 		}
698 	}
699 
700 	producer = tx_ring->producer;
701 	pbuf = &tx_ring->cmd_buf_arr[producer];
702 	pdev = adapter->pdev;
703 	first_desc = &tx_ring->desc_head[producer];
704 	hwdesc = &tx_ring->desc_head[producer];
705 	qlcnic_clear_cmddesc((u64 *)hwdesc);
706 
707 	if (qlcnic_map_tx_skb(pdev, skb, pbuf)) {
708 		adapter->stats.tx_dma_map_error++;
709 		goto drop_packet;
710 	}
711 
712 	pbuf->skb = skb;
713 	pbuf->frag_count = frag_count;
714 
715 	qlcnic_set_tx_frags_len(first_desc, frag_count, skb->len);
716 	qlcnic_set_tx_port(first_desc, adapter->portnum);
717 
718 	for (i = 0; i < frag_count; i++) {
719 		k = i % 4;
720 
721 		if ((k == 0) && (i > 0)) {
722 			/* move to next desc.*/
723 			producer = get_next_index(producer, num_txd);
724 			hwdesc = &tx_ring->desc_head[producer];
725 			qlcnic_clear_cmddesc((u64 *)hwdesc);
726 			tx_ring->cmd_buf_arr[producer].skb = NULL;
727 		}
728 
729 		buffrag = &pbuf->frag_array[i];
730 		hwdesc->buffer_length[k] = cpu_to_le16(buffrag->length);
731 		switch (k) {
732 		case 0:
733 			hwdesc->addr_buffer1 = cpu_to_le64(buffrag->dma);
734 			break;
735 		case 1:
736 			hwdesc->addr_buffer2 = cpu_to_le64(buffrag->dma);
737 			break;
738 		case 2:
739 			hwdesc->addr_buffer3 = cpu_to_le64(buffrag->dma);
740 			break;
741 		case 3:
742 			hwdesc->addr_buffer4 = cpu_to_le64(buffrag->dma);
743 			break;
744 		}
745 	}
746 
747 	tx_ring->producer = get_next_index(producer, num_txd);
748 	smp_mb();
749 
750 	protocol = ntohs(skb->protocol);
751 	if (protocol == ETH_P_IP)
752 		l4_is_udp = ip_hdr(skb)->protocol == IPPROTO_UDP;
753 	else if (protocol == ETH_P_IPV6)
754 		l4_is_udp = ipv6_hdr(skb)->nexthdr == IPPROTO_UDP;
755 
756 	/* Check if it is a VXLAN packet */
757 	if (!skb->encapsulation || !l4_is_udp ||
758 	    !qlcnic_encap_tx_offload(adapter)) {
759 		if (unlikely(qlcnic_tx_pkt(adapter, first_desc, skb,
760 					   tx_ring)))
761 			goto unwind_buff;
762 	} else {
763 		if (unlikely(qlcnic_tx_encap_pkt(adapter, first_desc,
764 						 skb, tx_ring)))
765 			goto unwind_buff;
766 	}
767 
768 	if (adapter->drv_mac_learn)
769 		qlcnic_send_filter(adapter, first_desc, skb);
770 
771 	tx_ring->tx_stats.tx_bytes += skb->len;
772 	tx_ring->tx_stats.xmit_called++;
773 
774 	qlcnic_update_cmd_producer(tx_ring);
775 
776 	return NETDEV_TX_OK;
777 
778 unwind_buff:
779 	qlcnic_unmap_buffers(pdev, skb, pbuf);
780 drop_packet:
781 	adapter->stats.txdropped++;
782 	dev_kfree_skb_any(skb);
783 	return NETDEV_TX_OK;
784 }
785 
786 void qlcnic_advert_link_change(struct qlcnic_adapter *adapter, int linkup)
787 {
788 	struct net_device *netdev = adapter->netdev;
789 
790 	if (adapter->ahw->linkup && !linkup) {
791 		netdev_info(netdev, "NIC Link is down\n");
792 		adapter->ahw->linkup = 0;
793 		netif_carrier_off(netdev);
794 	} else if (!adapter->ahw->linkup && linkup) {
795 		adapter->ahw->linkup = 1;
796 
797 		/* Do not advertise Link up to the stack if device
798 		 * is in loopback mode
799 		 */
800 		if (qlcnic_83xx_check(adapter) && adapter->ahw->lb_mode) {
801 			netdev_info(netdev, "NIC Link is up for loopback test\n");
802 			return;
803 		}
804 
805 		netdev_info(netdev, "NIC Link is up\n");
806 		netif_carrier_on(netdev);
807 	}
808 }
809 
810 static int qlcnic_alloc_rx_skb(struct qlcnic_adapter *adapter,
811 			       struct qlcnic_host_rds_ring *rds_ring,
812 			       struct qlcnic_rx_buffer *buffer)
813 {
814 	struct sk_buff *skb;
815 	dma_addr_t dma;
816 	struct pci_dev *pdev = adapter->pdev;
817 
818 	skb = netdev_alloc_skb(adapter->netdev, rds_ring->skb_size);
819 	if (!skb) {
820 		adapter->stats.skb_alloc_failure++;
821 		return -ENOMEM;
822 	}
823 
824 	skb_reserve(skb, NET_IP_ALIGN);
825 	dma = pci_map_single(pdev, skb->data,
826 			     rds_ring->dma_size, PCI_DMA_FROMDEVICE);
827 
828 	if (pci_dma_mapping_error(pdev, dma)) {
829 		adapter->stats.rx_dma_map_error++;
830 		dev_kfree_skb_any(skb);
831 		return -ENOMEM;
832 	}
833 
834 	buffer->skb = skb;
835 	buffer->dma = dma;
836 
837 	return 0;
838 }
839 
840 static void qlcnic_post_rx_buffers_nodb(struct qlcnic_adapter *adapter,
841 					struct qlcnic_host_rds_ring *rds_ring,
842 					u8 ring_id)
843 {
844 	struct rcv_desc *pdesc;
845 	struct qlcnic_rx_buffer *buffer;
846 	int  count = 0;
847 	uint32_t producer, handle;
848 	struct list_head *head;
849 
850 	if (!spin_trylock(&rds_ring->lock))
851 		return;
852 
853 	producer = rds_ring->producer;
854 	head = &rds_ring->free_list;
855 	while (!list_empty(head)) {
856 		buffer = list_entry(head->next, struct qlcnic_rx_buffer, list);
857 
858 		if (!buffer->skb) {
859 			if (qlcnic_alloc_rx_skb(adapter, rds_ring, buffer))
860 				break;
861 		}
862 		count++;
863 		list_del(&buffer->list);
864 
865 		/* make a rcv descriptor  */
866 		pdesc = &rds_ring->desc_head[producer];
867 		handle = qlcnic_get_ref_handle(adapter,
868 					       buffer->ref_handle, ring_id);
869 		pdesc->reference_handle = cpu_to_le16(handle);
870 		pdesc->buffer_length = cpu_to_le32(rds_ring->dma_size);
871 		pdesc->addr_buffer = cpu_to_le64(buffer->dma);
872 		producer = get_next_index(producer, rds_ring->num_desc);
873 	}
874 	if (count) {
875 		rds_ring->producer = producer;
876 		writel((producer - 1) & (rds_ring->num_desc - 1),
877 		       rds_ring->crb_rcv_producer);
878 	}
879 	spin_unlock(&rds_ring->lock);
880 }
881 
882 static int qlcnic_process_cmd_ring(struct qlcnic_adapter *adapter,
883 				   struct qlcnic_host_tx_ring *tx_ring,
884 				   int budget)
885 {
886 	u32 sw_consumer, hw_consumer;
887 	int i, done, count = 0;
888 	struct qlcnic_cmd_buffer *buffer;
889 	struct pci_dev *pdev = adapter->pdev;
890 	struct net_device *netdev = adapter->netdev;
891 	struct qlcnic_skb_frag *frag;
892 
893 	if (!spin_trylock(&tx_ring->tx_clean_lock))
894 		return 1;
895 
896 	sw_consumer = tx_ring->sw_consumer;
897 	hw_consumer = le32_to_cpu(*(tx_ring->hw_consumer));
898 
899 	while (sw_consumer != hw_consumer) {
900 		buffer = &tx_ring->cmd_buf_arr[sw_consumer];
901 		if (buffer->skb) {
902 			frag = &buffer->frag_array[0];
903 			pci_unmap_single(pdev, frag->dma, frag->length,
904 					 PCI_DMA_TODEVICE);
905 			frag->dma = 0ULL;
906 			for (i = 1; i < buffer->frag_count; i++) {
907 				frag++;
908 				pci_unmap_page(pdev, frag->dma, frag->length,
909 					       PCI_DMA_TODEVICE);
910 				frag->dma = 0ULL;
911 			}
912 			tx_ring->tx_stats.xmit_finished++;
913 			dev_kfree_skb_any(buffer->skb);
914 			buffer->skb = NULL;
915 		}
916 
917 		sw_consumer = get_next_index(sw_consumer, tx_ring->num_desc);
918 		if (++count >= budget)
919 			break;
920 	}
921 
922 	tx_ring->sw_consumer = sw_consumer;
923 
924 	if (count && netif_running(netdev)) {
925 		smp_mb();
926 		if (netif_tx_queue_stopped(tx_ring->txq) &&
927 		    netif_carrier_ok(netdev)) {
928 			if (qlcnic_tx_avail(tx_ring) > TX_STOP_THRESH) {
929 				netif_tx_wake_queue(tx_ring->txq);
930 				tx_ring->tx_stats.xmit_on++;
931 			}
932 		}
933 		adapter->tx_timeo_cnt = 0;
934 	}
935 	/*
936 	 * If everything is freed up to consumer then check if the ring is full
937 	 * If the ring is full then check if more needs to be freed and
938 	 * schedule the call back again.
939 	 *
940 	 * This happens when there are 2 CPUs. One could be freeing and the
941 	 * other filling it. If the ring is full when we get out of here and
942 	 * the card has already interrupted the host then the host can miss the
943 	 * interrupt.
944 	 *
945 	 * There is still a possible race condition and the host could miss an
946 	 * interrupt. The card has to take care of this.
947 	 */
948 	hw_consumer = le32_to_cpu(*(tx_ring->hw_consumer));
949 	done = (sw_consumer == hw_consumer);
950 
951 	spin_unlock(&tx_ring->tx_clean_lock);
952 
953 	return done;
954 }
955 
956 static int qlcnic_poll(struct napi_struct *napi, int budget)
957 {
958 	int tx_complete, work_done;
959 	struct qlcnic_host_sds_ring *sds_ring;
960 	struct qlcnic_adapter *adapter;
961 	struct qlcnic_host_tx_ring *tx_ring;
962 
963 	sds_ring = container_of(napi, struct qlcnic_host_sds_ring, napi);
964 	adapter = sds_ring->adapter;
965 	tx_ring = sds_ring->tx_ring;
966 
967 	tx_complete = qlcnic_process_cmd_ring(adapter, tx_ring,
968 					      budget);
969 	work_done = qlcnic_process_rcv_ring(sds_ring, budget);
970 	if ((work_done < budget) && tx_complete) {
971 		napi_complete(&sds_ring->napi);
972 		if (test_bit(__QLCNIC_DEV_UP, &adapter->state)) {
973 			qlcnic_enable_sds_intr(adapter, sds_ring);
974 			qlcnic_enable_tx_intr(adapter, tx_ring);
975 		}
976 	}
977 
978 	return work_done;
979 }
980 
981 static int qlcnic_tx_poll(struct napi_struct *napi, int budget)
982 {
983 	struct qlcnic_host_tx_ring *tx_ring;
984 	struct qlcnic_adapter *adapter;
985 	int work_done;
986 
987 	tx_ring = container_of(napi, struct qlcnic_host_tx_ring, napi);
988 	adapter = tx_ring->adapter;
989 
990 	work_done = qlcnic_process_cmd_ring(adapter, tx_ring, budget);
991 	if (work_done) {
992 		napi_complete(&tx_ring->napi);
993 		if (test_bit(__QLCNIC_DEV_UP, &adapter->state))
994 			qlcnic_enable_tx_intr(adapter, tx_ring);
995 	}
996 
997 	return work_done;
998 }
999 
1000 static int qlcnic_rx_poll(struct napi_struct *napi, int budget)
1001 {
1002 	struct qlcnic_host_sds_ring *sds_ring;
1003 	struct qlcnic_adapter *adapter;
1004 	int work_done;
1005 
1006 	sds_ring = container_of(napi, struct qlcnic_host_sds_ring, napi);
1007 	adapter = sds_ring->adapter;
1008 
1009 	work_done = qlcnic_process_rcv_ring(sds_ring, budget);
1010 
1011 	if (work_done < budget) {
1012 		napi_complete(&sds_ring->napi);
1013 		if (test_bit(__QLCNIC_DEV_UP, &adapter->state))
1014 			qlcnic_enable_sds_intr(adapter, sds_ring);
1015 	}
1016 
1017 	return work_done;
1018 }
1019 
1020 static void qlcnic_handle_linkevent(struct qlcnic_adapter *adapter,
1021 				    struct qlcnic_fw_msg *msg)
1022 {
1023 	u32 cable_OUI;
1024 	u16 cable_len, link_speed;
1025 	u8  link_status, module, duplex, autoneg, lb_status = 0;
1026 	struct net_device *netdev = adapter->netdev;
1027 
1028 	adapter->ahw->has_link_events = 1;
1029 
1030 	cable_OUI = msg->body[1] & 0xffffffff;
1031 	cable_len = (msg->body[1] >> 32) & 0xffff;
1032 	link_speed = (msg->body[1] >> 48) & 0xffff;
1033 
1034 	link_status = msg->body[2] & 0xff;
1035 	duplex = (msg->body[2] >> 16) & 0xff;
1036 	autoneg = (msg->body[2] >> 24) & 0xff;
1037 	lb_status = (msg->body[2] >> 32) & 0x3;
1038 
1039 	module = (msg->body[2] >> 8) & 0xff;
1040 	if (module == LINKEVENT_MODULE_TWINAX_UNSUPPORTED_CABLE)
1041 		dev_info(&netdev->dev,
1042 			 "unsupported cable: OUI 0x%x, length %d\n",
1043 			 cable_OUI, cable_len);
1044 	else if (module == LINKEVENT_MODULE_TWINAX_UNSUPPORTED_CABLELEN)
1045 		dev_info(&netdev->dev, "unsupported cable length %d\n",
1046 			 cable_len);
1047 
1048 	if (!link_status && (lb_status == QLCNIC_ILB_MODE ||
1049 	    lb_status == QLCNIC_ELB_MODE))
1050 		adapter->ahw->loopback_state |= QLCNIC_LINKEVENT;
1051 
1052 	qlcnic_advert_link_change(adapter, link_status);
1053 
1054 	if (duplex == LINKEVENT_FULL_DUPLEX)
1055 		adapter->ahw->link_duplex = DUPLEX_FULL;
1056 	else
1057 		adapter->ahw->link_duplex = DUPLEX_HALF;
1058 
1059 	adapter->ahw->module_type = module;
1060 	adapter->ahw->link_autoneg = autoneg;
1061 
1062 	if (link_status) {
1063 		adapter->ahw->link_speed = link_speed;
1064 	} else {
1065 		adapter->ahw->link_speed = SPEED_UNKNOWN;
1066 		adapter->ahw->link_duplex = DUPLEX_UNKNOWN;
1067 	}
1068 }
1069 
1070 static void qlcnic_handle_fw_message(int desc_cnt, int index,
1071 				     struct qlcnic_host_sds_ring *sds_ring)
1072 {
1073 	struct qlcnic_fw_msg msg;
1074 	struct status_desc *desc;
1075 	struct qlcnic_adapter *adapter;
1076 	struct device *dev;
1077 	int i = 0, opcode, ret;
1078 
1079 	while (desc_cnt > 0 && i < 8) {
1080 		desc = &sds_ring->desc_head[index];
1081 		msg.words[i++] = le64_to_cpu(desc->status_desc_data[0]);
1082 		msg.words[i++] = le64_to_cpu(desc->status_desc_data[1]);
1083 
1084 		index = get_next_index(index, sds_ring->num_desc);
1085 		desc_cnt--;
1086 	}
1087 
1088 	adapter = sds_ring->adapter;
1089 	dev = &adapter->pdev->dev;
1090 	opcode = qlcnic_get_nic_msg_opcode(msg.body[0]);
1091 
1092 	switch (opcode) {
1093 	case QLCNIC_C2H_OPCODE_GET_LINKEVENT_RESPONSE:
1094 		qlcnic_handle_linkevent(adapter, &msg);
1095 		break;
1096 	case QLCNIC_C2H_OPCODE_CONFIG_LOOPBACK:
1097 		ret = (u32)(msg.body[1]);
1098 		switch (ret) {
1099 		case 0:
1100 			adapter->ahw->loopback_state |= QLCNIC_LB_RESPONSE;
1101 			break;
1102 		case 1:
1103 			dev_info(dev, "loopback already in progress\n");
1104 			adapter->ahw->diag_cnt = -EINPROGRESS;
1105 			break;
1106 		case 2:
1107 			dev_info(dev, "loopback cable is not connected\n");
1108 			adapter->ahw->diag_cnt = -ENODEV;
1109 			break;
1110 		default:
1111 			dev_info(dev,
1112 				 "loopback configure request failed, err %x\n",
1113 				 ret);
1114 			adapter->ahw->diag_cnt = -EIO;
1115 			break;
1116 		}
1117 		break;
1118 	case QLCNIC_C2H_OPCODE_GET_DCB_AEN:
1119 		qlcnic_dcb_aen_handler(adapter->dcb, (void *)&msg);
1120 		break;
1121 	default:
1122 		break;
1123 	}
1124 }
1125 
1126 static struct sk_buff *qlcnic_process_rxbuf(struct qlcnic_adapter *adapter,
1127 					    struct qlcnic_host_rds_ring *ring,
1128 					    u16 index, u16 cksum)
1129 {
1130 	struct qlcnic_rx_buffer *buffer;
1131 	struct sk_buff *skb;
1132 
1133 	buffer = &ring->rx_buf_arr[index];
1134 	if (unlikely(buffer->skb == NULL)) {
1135 		WARN_ON(1);
1136 		return NULL;
1137 	}
1138 
1139 	pci_unmap_single(adapter->pdev, buffer->dma, ring->dma_size,
1140 			 PCI_DMA_FROMDEVICE);
1141 
1142 	skb = buffer->skb;
1143 	if (likely((adapter->netdev->features & NETIF_F_RXCSUM) &&
1144 		   (cksum == STATUS_CKSUM_OK || cksum == STATUS_CKSUM_LOOP))) {
1145 		adapter->stats.csummed++;
1146 		skb->ip_summed = CHECKSUM_UNNECESSARY;
1147 	} else {
1148 		skb_checksum_none_assert(skb);
1149 	}
1150 
1151 
1152 	buffer->skb = NULL;
1153 
1154 	return skb;
1155 }
1156 
1157 static inline int qlcnic_check_rx_tagging(struct qlcnic_adapter *adapter,
1158 					  struct sk_buff *skb, u16 *vlan_tag)
1159 {
1160 	struct ethhdr *eth_hdr;
1161 
1162 	if (!__vlan_get_tag(skb, vlan_tag)) {
1163 		eth_hdr = (struct ethhdr *)skb->data;
1164 		memmove(skb->data + VLAN_HLEN, eth_hdr, ETH_ALEN * 2);
1165 		skb_pull(skb, VLAN_HLEN);
1166 	}
1167 	if (!adapter->rx_pvid)
1168 		return 0;
1169 
1170 	if (*vlan_tag == adapter->rx_pvid) {
1171 		/* Outer vlan tag. Packet should follow non-vlan path */
1172 		*vlan_tag = 0xffff;
1173 		return 0;
1174 	}
1175 	if (adapter->flags & QLCNIC_TAGGING_ENABLED)
1176 		return 0;
1177 
1178 	return -EINVAL;
1179 }
1180 
1181 static struct qlcnic_rx_buffer *
1182 qlcnic_process_rcv(struct qlcnic_adapter *adapter,
1183 		   struct qlcnic_host_sds_ring *sds_ring, int ring,
1184 		   u64 sts_data0)
1185 {
1186 	struct net_device *netdev = adapter->netdev;
1187 	struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1188 	struct qlcnic_rx_buffer *buffer;
1189 	struct sk_buff *skb;
1190 	struct qlcnic_host_rds_ring *rds_ring;
1191 	int index, length, cksum, pkt_offset, is_lb_pkt;
1192 	u16 vid = 0xffff, t_vid;
1193 
1194 	if (unlikely(ring >= adapter->max_rds_rings))
1195 		return NULL;
1196 
1197 	rds_ring = &recv_ctx->rds_rings[ring];
1198 
1199 	index = qlcnic_get_sts_refhandle(sts_data0);
1200 	if (unlikely(index >= rds_ring->num_desc))
1201 		return NULL;
1202 
1203 	buffer = &rds_ring->rx_buf_arr[index];
1204 	length = qlcnic_get_sts_totallength(sts_data0);
1205 	cksum  = qlcnic_get_sts_status(sts_data0);
1206 	pkt_offset = qlcnic_get_sts_pkt_offset(sts_data0);
1207 
1208 	skb = qlcnic_process_rxbuf(adapter, rds_ring, index, cksum);
1209 	if (!skb)
1210 		return buffer;
1211 
1212 	if (adapter->rx_mac_learn) {
1213 		t_vid = 0;
1214 		is_lb_pkt = qlcnic_82xx_is_lb_pkt(sts_data0);
1215 		qlcnic_add_lb_filter(adapter, skb, is_lb_pkt, t_vid);
1216 	}
1217 
1218 	if (length > rds_ring->skb_size)
1219 		skb_put(skb, rds_ring->skb_size);
1220 	else
1221 		skb_put(skb, length);
1222 
1223 	if (pkt_offset)
1224 		skb_pull(skb, pkt_offset);
1225 
1226 	if (unlikely(qlcnic_check_rx_tagging(adapter, skb, &vid))) {
1227 		adapter->stats.rxdropped++;
1228 		dev_kfree_skb(skb);
1229 		return buffer;
1230 	}
1231 
1232 	skb->protocol = eth_type_trans(skb, netdev);
1233 
1234 	if (vid != 0xffff)
1235 		__vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid);
1236 
1237 	napi_gro_receive(&sds_ring->napi, skb);
1238 
1239 	adapter->stats.rx_pkts++;
1240 	adapter->stats.rxbytes += length;
1241 
1242 	return buffer;
1243 }
1244 
1245 #define QLC_TCP_HDR_SIZE            20
1246 #define QLC_TCP_TS_OPTION_SIZE      12
1247 #define QLC_TCP_TS_HDR_SIZE         (QLC_TCP_HDR_SIZE + QLC_TCP_TS_OPTION_SIZE)
1248 
1249 static struct qlcnic_rx_buffer *
1250 qlcnic_process_lro(struct qlcnic_adapter *adapter,
1251 		   int ring, u64 sts_data0, u64 sts_data1)
1252 {
1253 	struct net_device *netdev = adapter->netdev;
1254 	struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1255 	struct qlcnic_rx_buffer *buffer;
1256 	struct sk_buff *skb;
1257 	struct qlcnic_host_rds_ring *rds_ring;
1258 	struct iphdr *iph;
1259 	struct ipv6hdr *ipv6h;
1260 	struct tcphdr *th;
1261 	bool push, timestamp;
1262 	int index, l2_hdr_offset, l4_hdr_offset, is_lb_pkt;
1263 	u16 lro_length, length, data_offset, t_vid, vid = 0xffff;
1264 	u32 seq_number;
1265 
1266 	if (unlikely(ring >= adapter->max_rds_rings))
1267 		return NULL;
1268 
1269 	rds_ring = &recv_ctx->rds_rings[ring];
1270 
1271 	index = qlcnic_get_lro_sts_refhandle(sts_data0);
1272 	if (unlikely(index >= rds_ring->num_desc))
1273 		return NULL;
1274 
1275 	buffer = &rds_ring->rx_buf_arr[index];
1276 
1277 	timestamp = qlcnic_get_lro_sts_timestamp(sts_data0);
1278 	lro_length = qlcnic_get_lro_sts_length(sts_data0);
1279 	l2_hdr_offset = qlcnic_get_lro_sts_l2_hdr_offset(sts_data0);
1280 	l4_hdr_offset = qlcnic_get_lro_sts_l4_hdr_offset(sts_data0);
1281 	push = qlcnic_get_lro_sts_push_flag(sts_data0);
1282 	seq_number = qlcnic_get_lro_sts_seq_number(sts_data1);
1283 
1284 	skb = qlcnic_process_rxbuf(adapter, rds_ring, index, STATUS_CKSUM_OK);
1285 	if (!skb)
1286 		return buffer;
1287 
1288 	if (adapter->rx_mac_learn) {
1289 		t_vid = 0;
1290 		is_lb_pkt = qlcnic_82xx_is_lb_pkt(sts_data0);
1291 		qlcnic_add_lb_filter(adapter, skb, is_lb_pkt, t_vid);
1292 	}
1293 
1294 	if (timestamp)
1295 		data_offset = l4_hdr_offset + QLC_TCP_TS_HDR_SIZE;
1296 	else
1297 		data_offset = l4_hdr_offset + QLC_TCP_HDR_SIZE;
1298 
1299 	skb_put(skb, lro_length + data_offset);
1300 	skb_pull(skb, l2_hdr_offset);
1301 
1302 	if (unlikely(qlcnic_check_rx_tagging(adapter, skb, &vid))) {
1303 		adapter->stats.rxdropped++;
1304 		dev_kfree_skb(skb);
1305 		return buffer;
1306 	}
1307 
1308 	skb->protocol = eth_type_trans(skb, netdev);
1309 
1310 	if (ntohs(skb->protocol) == ETH_P_IPV6) {
1311 		ipv6h = (struct ipv6hdr *)skb->data;
1312 		th = (struct tcphdr *)(skb->data + sizeof(struct ipv6hdr));
1313 		length = (th->doff << 2) + lro_length;
1314 		ipv6h->payload_len = htons(length);
1315 	} else {
1316 		iph = (struct iphdr *)skb->data;
1317 		th = (struct tcphdr *)(skb->data + (iph->ihl << 2));
1318 		length = (iph->ihl << 2) + (th->doff << 2) + lro_length;
1319 		csum_replace2(&iph->check, iph->tot_len, htons(length));
1320 		iph->tot_len = htons(length);
1321 	}
1322 
1323 	th->psh = push;
1324 	th->seq = htonl(seq_number);
1325 	length = skb->len;
1326 
1327 	if (adapter->flags & QLCNIC_FW_LRO_MSS_CAP) {
1328 		skb_shinfo(skb)->gso_size = qlcnic_get_lro_sts_mss(sts_data1);
1329 		if (skb->protocol == htons(ETH_P_IPV6))
1330 			skb_shinfo(skb)->gso_type = SKB_GSO_TCPV6;
1331 		else
1332 			skb_shinfo(skb)->gso_type = SKB_GSO_TCPV4;
1333 	}
1334 
1335 	if (vid != 0xffff)
1336 		__vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid);
1337 	netif_receive_skb(skb);
1338 
1339 	adapter->stats.lro_pkts++;
1340 	adapter->stats.lrobytes += length;
1341 
1342 	return buffer;
1343 }
1344 
1345 static int qlcnic_process_rcv_ring(struct qlcnic_host_sds_ring *sds_ring, int max)
1346 {
1347 	struct qlcnic_host_rds_ring *rds_ring;
1348 	struct qlcnic_adapter *adapter = sds_ring->adapter;
1349 	struct list_head *cur;
1350 	struct status_desc *desc;
1351 	struct qlcnic_rx_buffer *rxbuf;
1352 	int opcode, desc_cnt, count = 0;
1353 	u64 sts_data0, sts_data1;
1354 	u8 ring;
1355 	u32 consumer = sds_ring->consumer;
1356 
1357 	while (count < max) {
1358 		desc = &sds_ring->desc_head[consumer];
1359 		sts_data0 = le64_to_cpu(desc->status_desc_data[0]);
1360 
1361 		if (!(sts_data0 & STATUS_OWNER_HOST))
1362 			break;
1363 
1364 		desc_cnt = qlcnic_get_sts_desc_cnt(sts_data0);
1365 		opcode = qlcnic_get_sts_opcode(sts_data0);
1366 		switch (opcode) {
1367 		case QLCNIC_RXPKT_DESC:
1368 		case QLCNIC_OLD_RXPKT_DESC:
1369 		case QLCNIC_SYN_OFFLOAD:
1370 			ring = qlcnic_get_sts_type(sts_data0);
1371 			rxbuf = qlcnic_process_rcv(adapter, sds_ring, ring,
1372 						   sts_data0);
1373 			break;
1374 		case QLCNIC_LRO_DESC:
1375 			ring = qlcnic_get_lro_sts_type(sts_data0);
1376 			sts_data1 = le64_to_cpu(desc->status_desc_data[1]);
1377 			rxbuf = qlcnic_process_lro(adapter, ring, sts_data0,
1378 						   sts_data1);
1379 			break;
1380 		case QLCNIC_RESPONSE_DESC:
1381 			qlcnic_handle_fw_message(desc_cnt, consumer, sds_ring);
1382 		default:
1383 			goto skip;
1384 		}
1385 		WARN_ON(desc_cnt > 1);
1386 
1387 		if (likely(rxbuf))
1388 			list_add_tail(&rxbuf->list, &sds_ring->free_list[ring]);
1389 		else
1390 			adapter->stats.null_rxbuf++;
1391 skip:
1392 		for (; desc_cnt > 0; desc_cnt--) {
1393 			desc = &sds_ring->desc_head[consumer];
1394 			desc->status_desc_data[0] = QLCNIC_DESC_OWNER_FW;
1395 			consumer = get_next_index(consumer, sds_ring->num_desc);
1396 		}
1397 		count++;
1398 	}
1399 
1400 	for (ring = 0; ring < adapter->max_rds_rings; ring++) {
1401 		rds_ring = &adapter->recv_ctx->rds_rings[ring];
1402 		if (!list_empty(&sds_ring->free_list[ring])) {
1403 			list_for_each(cur, &sds_ring->free_list[ring]) {
1404 				rxbuf = list_entry(cur, struct qlcnic_rx_buffer,
1405 						   list);
1406 				qlcnic_alloc_rx_skb(adapter, rds_ring, rxbuf);
1407 			}
1408 			spin_lock(&rds_ring->lock);
1409 			list_splice_tail_init(&sds_ring->free_list[ring],
1410 					      &rds_ring->free_list);
1411 			spin_unlock(&rds_ring->lock);
1412 		}
1413 
1414 		qlcnic_post_rx_buffers_nodb(adapter, rds_ring, ring);
1415 	}
1416 
1417 	if (count) {
1418 		sds_ring->consumer = consumer;
1419 		writel(consumer, sds_ring->crb_sts_consumer);
1420 	}
1421 
1422 	return count;
1423 }
1424 
1425 void qlcnic_post_rx_buffers(struct qlcnic_adapter *adapter,
1426 			    struct qlcnic_host_rds_ring *rds_ring, u8 ring_id)
1427 {
1428 	struct rcv_desc *pdesc;
1429 	struct qlcnic_rx_buffer *buffer;
1430 	int count = 0;
1431 	u32 producer, handle;
1432 	struct list_head *head;
1433 
1434 	producer = rds_ring->producer;
1435 	head = &rds_ring->free_list;
1436 
1437 	while (!list_empty(head)) {
1438 
1439 		buffer = list_entry(head->next, struct qlcnic_rx_buffer, list);
1440 
1441 		if (!buffer->skb) {
1442 			if (qlcnic_alloc_rx_skb(adapter, rds_ring, buffer))
1443 				break;
1444 		}
1445 
1446 		count++;
1447 		list_del(&buffer->list);
1448 
1449 		/* make a rcv descriptor  */
1450 		pdesc = &rds_ring->desc_head[producer];
1451 		pdesc->addr_buffer = cpu_to_le64(buffer->dma);
1452 		handle = qlcnic_get_ref_handle(adapter, buffer->ref_handle,
1453 					       ring_id);
1454 		pdesc->reference_handle = cpu_to_le16(handle);
1455 		pdesc->buffer_length = cpu_to_le32(rds_ring->dma_size);
1456 		producer = get_next_index(producer, rds_ring->num_desc);
1457 	}
1458 
1459 	if (count) {
1460 		rds_ring->producer = producer;
1461 		writel((producer-1) & (rds_ring->num_desc-1),
1462 		       rds_ring->crb_rcv_producer);
1463 	}
1464 }
1465 
1466 static void dump_skb(struct sk_buff *skb, struct qlcnic_adapter *adapter)
1467 {
1468 	int i;
1469 	unsigned char *data = skb->data;
1470 
1471 	pr_info(KERN_INFO "\n");
1472 	for (i = 0; i < skb->len; i++) {
1473 		QLCDB(adapter, DRV, "%02x ", data[i]);
1474 		if ((i & 0x0f) == 8)
1475 			pr_info(KERN_INFO "\n");
1476 	}
1477 }
1478 
1479 static void qlcnic_process_rcv_diag(struct qlcnic_adapter *adapter, int ring,
1480 				    u64 sts_data0)
1481 {
1482 	struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1483 	struct sk_buff *skb;
1484 	struct qlcnic_host_rds_ring *rds_ring;
1485 	int index, length, cksum, pkt_offset;
1486 
1487 	if (unlikely(ring >= adapter->max_rds_rings))
1488 		return;
1489 
1490 	rds_ring = &recv_ctx->rds_rings[ring];
1491 
1492 	index = qlcnic_get_sts_refhandle(sts_data0);
1493 	length = qlcnic_get_sts_totallength(sts_data0);
1494 	if (unlikely(index >= rds_ring->num_desc))
1495 		return;
1496 
1497 	cksum  = qlcnic_get_sts_status(sts_data0);
1498 	pkt_offset = qlcnic_get_sts_pkt_offset(sts_data0);
1499 
1500 	skb = qlcnic_process_rxbuf(adapter, rds_ring, index, cksum);
1501 	if (!skb)
1502 		return;
1503 
1504 	if (length > rds_ring->skb_size)
1505 		skb_put(skb, rds_ring->skb_size);
1506 	else
1507 		skb_put(skb, length);
1508 
1509 	if (pkt_offset)
1510 		skb_pull(skb, pkt_offset);
1511 
1512 	if (!qlcnic_check_loopback_buff(skb->data, adapter->mac_addr))
1513 		adapter->ahw->diag_cnt++;
1514 	else
1515 		dump_skb(skb, adapter);
1516 
1517 	dev_kfree_skb_any(skb);
1518 	adapter->stats.rx_pkts++;
1519 	adapter->stats.rxbytes += length;
1520 
1521 	return;
1522 }
1523 
1524 void qlcnic_82xx_process_rcv_ring_diag(struct qlcnic_host_sds_ring *sds_ring)
1525 {
1526 	struct qlcnic_adapter *adapter = sds_ring->adapter;
1527 	struct status_desc *desc;
1528 	u64 sts_data0;
1529 	int ring, opcode, desc_cnt;
1530 
1531 	u32 consumer = sds_ring->consumer;
1532 
1533 	desc = &sds_ring->desc_head[consumer];
1534 	sts_data0 = le64_to_cpu(desc->status_desc_data[0]);
1535 
1536 	if (!(sts_data0 & STATUS_OWNER_HOST))
1537 		return;
1538 
1539 	desc_cnt = qlcnic_get_sts_desc_cnt(sts_data0);
1540 	opcode = qlcnic_get_sts_opcode(sts_data0);
1541 	switch (opcode) {
1542 	case QLCNIC_RESPONSE_DESC:
1543 		qlcnic_handle_fw_message(desc_cnt, consumer, sds_ring);
1544 		break;
1545 	default:
1546 		ring = qlcnic_get_sts_type(sts_data0);
1547 		qlcnic_process_rcv_diag(adapter, ring, sts_data0);
1548 		break;
1549 	}
1550 
1551 	for (; desc_cnt > 0; desc_cnt--) {
1552 		desc = &sds_ring->desc_head[consumer];
1553 		desc->status_desc_data[0] = cpu_to_le64(STATUS_OWNER_PHANTOM);
1554 		consumer = get_next_index(consumer, sds_ring->num_desc);
1555 	}
1556 
1557 	sds_ring->consumer = consumer;
1558 	writel(consumer, sds_ring->crb_sts_consumer);
1559 }
1560 
1561 int qlcnic_82xx_napi_add(struct qlcnic_adapter *adapter,
1562 			 struct net_device *netdev)
1563 {
1564 	int ring;
1565 	struct qlcnic_host_sds_ring *sds_ring;
1566 	struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1567 	struct qlcnic_host_tx_ring *tx_ring;
1568 
1569 	if (qlcnic_alloc_sds_rings(recv_ctx, adapter->drv_sds_rings))
1570 		return -ENOMEM;
1571 
1572 	for (ring = 0; ring < adapter->drv_sds_rings; ring++) {
1573 		sds_ring = &recv_ctx->sds_rings[ring];
1574 		if (qlcnic_check_multi_tx(adapter) &&
1575 		    !adapter->ahw->diag_test) {
1576 			netif_napi_add(netdev, &sds_ring->napi, qlcnic_rx_poll,
1577 				       NAPI_POLL_WEIGHT);
1578 		} else {
1579 			if (ring == (adapter->drv_sds_rings - 1))
1580 				netif_napi_add(netdev, &sds_ring->napi,
1581 					       qlcnic_poll,
1582 					       NAPI_POLL_WEIGHT);
1583 			else
1584 				netif_napi_add(netdev, &sds_ring->napi,
1585 					       qlcnic_rx_poll,
1586 					       NAPI_POLL_WEIGHT);
1587 		}
1588 	}
1589 
1590 	if (qlcnic_alloc_tx_rings(adapter, netdev)) {
1591 		qlcnic_free_sds_rings(recv_ctx);
1592 		return -ENOMEM;
1593 	}
1594 
1595 	if (qlcnic_check_multi_tx(adapter) && !adapter->ahw->diag_test) {
1596 		for (ring = 0; ring < adapter->drv_tx_rings; ring++) {
1597 			tx_ring = &adapter->tx_ring[ring];
1598 			netif_napi_add(netdev, &tx_ring->napi, qlcnic_tx_poll,
1599 				       NAPI_POLL_WEIGHT);
1600 		}
1601 	}
1602 
1603 	return 0;
1604 }
1605 
1606 void qlcnic_82xx_napi_del(struct qlcnic_adapter *adapter)
1607 {
1608 	int ring;
1609 	struct qlcnic_host_sds_ring *sds_ring;
1610 	struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1611 	struct qlcnic_host_tx_ring *tx_ring;
1612 
1613 	for (ring = 0; ring < adapter->drv_sds_rings; ring++) {
1614 		sds_ring = &recv_ctx->sds_rings[ring];
1615 		netif_napi_del(&sds_ring->napi);
1616 	}
1617 
1618 	qlcnic_free_sds_rings(adapter->recv_ctx);
1619 
1620 	if (qlcnic_check_multi_tx(adapter) && !adapter->ahw->diag_test) {
1621 		for (ring = 0; ring < adapter->drv_tx_rings; ring++) {
1622 			tx_ring = &adapter->tx_ring[ring];
1623 			netif_napi_del(&tx_ring->napi);
1624 		}
1625 	}
1626 
1627 	qlcnic_free_tx_rings(adapter);
1628 }
1629 
1630 void qlcnic_82xx_napi_enable(struct qlcnic_adapter *adapter)
1631 {
1632 	int ring;
1633 	struct qlcnic_host_sds_ring *sds_ring;
1634 	struct qlcnic_host_tx_ring *tx_ring;
1635 	struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1636 
1637 	if (adapter->is_up != QLCNIC_ADAPTER_UP_MAGIC)
1638 		return;
1639 
1640 	for (ring = 0; ring < adapter->drv_sds_rings; ring++) {
1641 		sds_ring = &recv_ctx->sds_rings[ring];
1642 		napi_enable(&sds_ring->napi);
1643 		qlcnic_enable_sds_intr(adapter, sds_ring);
1644 	}
1645 
1646 	if (qlcnic_check_multi_tx(adapter) &&
1647 	    (adapter->flags & QLCNIC_MSIX_ENABLED) &&
1648 	    !adapter->ahw->diag_test) {
1649 		for (ring = 0; ring < adapter->drv_tx_rings; ring++) {
1650 			tx_ring = &adapter->tx_ring[ring];
1651 			napi_enable(&tx_ring->napi);
1652 			qlcnic_enable_tx_intr(adapter, tx_ring);
1653 		}
1654 	}
1655 }
1656 
1657 void qlcnic_82xx_napi_disable(struct qlcnic_adapter *adapter)
1658 {
1659 	int ring;
1660 	struct qlcnic_host_sds_ring *sds_ring;
1661 	struct qlcnic_host_tx_ring *tx_ring;
1662 	struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1663 
1664 	if (adapter->is_up != QLCNIC_ADAPTER_UP_MAGIC)
1665 		return;
1666 
1667 	for (ring = 0; ring < adapter->drv_sds_rings; ring++) {
1668 		sds_ring = &recv_ctx->sds_rings[ring];
1669 		qlcnic_disable_sds_intr(adapter, sds_ring);
1670 		napi_synchronize(&sds_ring->napi);
1671 		napi_disable(&sds_ring->napi);
1672 	}
1673 
1674 	if ((adapter->flags & QLCNIC_MSIX_ENABLED) &&
1675 	    !adapter->ahw->diag_test &&
1676 	    qlcnic_check_multi_tx(adapter)) {
1677 		for (ring = 0; ring < adapter->drv_tx_rings; ring++) {
1678 			tx_ring = &adapter->tx_ring[ring];
1679 			qlcnic_disable_tx_intr(adapter, tx_ring);
1680 			napi_synchronize(&tx_ring->napi);
1681 			napi_disable(&tx_ring->napi);
1682 		}
1683 	}
1684 }
1685 
1686 #define QLC_83XX_NORMAL_LB_PKT	(1ULL << 36)
1687 #define QLC_83XX_LRO_LB_PKT	(1ULL << 46)
1688 
1689 static inline int qlcnic_83xx_is_lb_pkt(u64 sts_data, int lro_pkt)
1690 {
1691 	if (lro_pkt)
1692 		return (sts_data & QLC_83XX_LRO_LB_PKT) ? 1 : 0;
1693 	else
1694 		return (sts_data & QLC_83XX_NORMAL_LB_PKT) ? 1 : 0;
1695 }
1696 
1697 #define QLCNIC_ENCAP_LENGTH_MASK	0x7f
1698 
1699 static inline u8 qlcnic_encap_length(u64 sts_data)
1700 {
1701 	return sts_data & QLCNIC_ENCAP_LENGTH_MASK;
1702 }
1703 
1704 static struct qlcnic_rx_buffer *
1705 qlcnic_83xx_process_rcv(struct qlcnic_adapter *adapter,
1706 			struct qlcnic_host_sds_ring *sds_ring,
1707 			u8 ring, u64 sts_data[])
1708 {
1709 	struct net_device *netdev = adapter->netdev;
1710 	struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1711 	struct qlcnic_rx_buffer *buffer;
1712 	struct sk_buff *skb;
1713 	struct qlcnic_host_rds_ring *rds_ring;
1714 	int index, length, cksum, is_lb_pkt;
1715 	u16 vid = 0xffff;
1716 	int err;
1717 
1718 	if (unlikely(ring >= adapter->max_rds_rings))
1719 		return NULL;
1720 
1721 	rds_ring = &recv_ctx->rds_rings[ring];
1722 
1723 	index = qlcnic_83xx_hndl(sts_data[0]);
1724 	if (unlikely(index >= rds_ring->num_desc))
1725 		return NULL;
1726 
1727 	buffer = &rds_ring->rx_buf_arr[index];
1728 	length = qlcnic_83xx_pktln(sts_data[0]);
1729 	cksum  = qlcnic_83xx_csum_status(sts_data[1]);
1730 	skb = qlcnic_process_rxbuf(adapter, rds_ring, index, cksum);
1731 	if (!skb)
1732 		return buffer;
1733 
1734 	if (length > rds_ring->skb_size)
1735 		skb_put(skb, rds_ring->skb_size);
1736 	else
1737 		skb_put(skb, length);
1738 
1739 	err = qlcnic_check_rx_tagging(adapter, skb, &vid);
1740 
1741 	if (adapter->rx_mac_learn) {
1742 		is_lb_pkt = qlcnic_83xx_is_lb_pkt(sts_data[1], 0);
1743 		qlcnic_add_lb_filter(adapter, skb, is_lb_pkt, vid);
1744 	}
1745 
1746 	if (unlikely(err)) {
1747 		adapter->stats.rxdropped++;
1748 		dev_kfree_skb(skb);
1749 		return buffer;
1750 	}
1751 
1752 	skb->protocol = eth_type_trans(skb, netdev);
1753 
1754 	if (qlcnic_encap_length(sts_data[1]) &&
1755 	    skb->ip_summed == CHECKSUM_UNNECESSARY) {
1756 		skb->csum_level = 1;
1757 		adapter->stats.encap_rx_csummed++;
1758 	}
1759 
1760 	if (vid != 0xffff)
1761 		__vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid);
1762 
1763 	napi_gro_receive(&sds_ring->napi, skb);
1764 
1765 	adapter->stats.rx_pkts++;
1766 	adapter->stats.rxbytes += length;
1767 
1768 	return buffer;
1769 }
1770 
1771 static struct qlcnic_rx_buffer *
1772 qlcnic_83xx_process_lro(struct qlcnic_adapter *adapter,
1773 			u8 ring, u64 sts_data[])
1774 {
1775 	struct net_device *netdev = adapter->netdev;
1776 	struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1777 	struct qlcnic_rx_buffer *buffer;
1778 	struct sk_buff *skb;
1779 	struct qlcnic_host_rds_ring *rds_ring;
1780 	struct iphdr *iph;
1781 	struct ipv6hdr *ipv6h;
1782 	struct tcphdr *th;
1783 	bool push;
1784 	int l2_hdr_offset, l4_hdr_offset;
1785 	int index, is_lb_pkt;
1786 	u16 lro_length, length, data_offset, gso_size;
1787 	u16 vid = 0xffff;
1788 	int err;
1789 
1790 	if (unlikely(ring >= adapter->max_rds_rings))
1791 		return NULL;
1792 
1793 	rds_ring = &recv_ctx->rds_rings[ring];
1794 
1795 	index = qlcnic_83xx_hndl(sts_data[0]);
1796 	if (unlikely(index >= rds_ring->num_desc))
1797 		return NULL;
1798 
1799 	buffer = &rds_ring->rx_buf_arr[index];
1800 
1801 	lro_length = qlcnic_83xx_lro_pktln(sts_data[0]);
1802 	l2_hdr_offset = qlcnic_83xx_l2_hdr_off(sts_data[1]);
1803 	l4_hdr_offset = qlcnic_83xx_l4_hdr_off(sts_data[1]);
1804 	push = qlcnic_83xx_is_psh_bit(sts_data[1]);
1805 
1806 	skb = qlcnic_process_rxbuf(adapter, rds_ring, index, STATUS_CKSUM_OK);
1807 	if (!skb)
1808 		return buffer;
1809 
1810 	if (qlcnic_83xx_is_tstamp(sts_data[1]))
1811 		data_offset = l4_hdr_offset + QLCNIC_TCP_TS_HDR_SIZE;
1812 	else
1813 		data_offset = l4_hdr_offset + QLCNIC_TCP_HDR_SIZE;
1814 
1815 	skb_put(skb, lro_length + data_offset);
1816 	skb_pull(skb, l2_hdr_offset);
1817 
1818 	err = qlcnic_check_rx_tagging(adapter, skb, &vid);
1819 
1820 	if (adapter->rx_mac_learn) {
1821 		is_lb_pkt = qlcnic_83xx_is_lb_pkt(sts_data[1], 1);
1822 		qlcnic_add_lb_filter(adapter, skb, is_lb_pkt, vid);
1823 	}
1824 
1825 	if (unlikely(err)) {
1826 		adapter->stats.rxdropped++;
1827 		dev_kfree_skb(skb);
1828 		return buffer;
1829 	}
1830 
1831 	skb->protocol = eth_type_trans(skb, netdev);
1832 	if (ntohs(skb->protocol) == ETH_P_IPV6) {
1833 		ipv6h = (struct ipv6hdr *)skb->data;
1834 		th = (struct tcphdr *)(skb->data + sizeof(struct ipv6hdr));
1835 
1836 		length = (th->doff << 2) + lro_length;
1837 		ipv6h->payload_len = htons(length);
1838 	} else {
1839 		iph = (struct iphdr *)skb->data;
1840 		th = (struct tcphdr *)(skb->data + (iph->ihl << 2));
1841 		length = (iph->ihl << 2) + (th->doff << 2) + lro_length;
1842 		csum_replace2(&iph->check, iph->tot_len, htons(length));
1843 		iph->tot_len = htons(length);
1844 	}
1845 
1846 	th->psh = push;
1847 	length = skb->len;
1848 
1849 	if (adapter->flags & QLCNIC_FW_LRO_MSS_CAP) {
1850 		gso_size = qlcnic_83xx_get_lro_sts_mss(sts_data[0]);
1851 		skb_shinfo(skb)->gso_size = gso_size;
1852 		if (skb->protocol == htons(ETH_P_IPV6))
1853 			skb_shinfo(skb)->gso_type = SKB_GSO_TCPV6;
1854 		else
1855 			skb_shinfo(skb)->gso_type = SKB_GSO_TCPV4;
1856 	}
1857 
1858 	if (vid != 0xffff)
1859 		__vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid);
1860 
1861 	netif_receive_skb(skb);
1862 
1863 	adapter->stats.lro_pkts++;
1864 	adapter->stats.lrobytes += length;
1865 	return buffer;
1866 }
1867 
1868 static int qlcnic_83xx_process_rcv_ring(struct qlcnic_host_sds_ring *sds_ring,
1869 					int max)
1870 {
1871 	struct qlcnic_host_rds_ring *rds_ring;
1872 	struct qlcnic_adapter *adapter = sds_ring->adapter;
1873 	struct list_head *cur;
1874 	struct status_desc *desc;
1875 	struct qlcnic_rx_buffer *rxbuf = NULL;
1876 	u8 ring;
1877 	u64 sts_data[2];
1878 	int count = 0, opcode;
1879 	u32 consumer = sds_ring->consumer;
1880 
1881 	while (count < max) {
1882 		desc = &sds_ring->desc_head[consumer];
1883 		sts_data[1] = le64_to_cpu(desc->status_desc_data[1]);
1884 		opcode = qlcnic_83xx_opcode(sts_data[1]);
1885 		if (!opcode)
1886 			break;
1887 		sts_data[0] = le64_to_cpu(desc->status_desc_data[0]);
1888 		ring = QLCNIC_FETCH_RING_ID(sts_data[0]);
1889 
1890 		switch (opcode) {
1891 		case QLC_83XX_REG_DESC:
1892 			rxbuf = qlcnic_83xx_process_rcv(adapter, sds_ring,
1893 							ring, sts_data);
1894 			break;
1895 		case QLC_83XX_LRO_DESC:
1896 			rxbuf = qlcnic_83xx_process_lro(adapter, ring,
1897 							sts_data);
1898 			break;
1899 		default:
1900 			dev_info(&adapter->pdev->dev,
1901 				 "Unknown opcode: 0x%x\n", opcode);
1902 			goto skip;
1903 		}
1904 
1905 		if (likely(rxbuf))
1906 			list_add_tail(&rxbuf->list, &sds_ring->free_list[ring]);
1907 		else
1908 			adapter->stats.null_rxbuf++;
1909 skip:
1910 		desc = &sds_ring->desc_head[consumer];
1911 		/* Reset the descriptor */
1912 		desc->status_desc_data[1] = 0;
1913 		consumer = get_next_index(consumer, sds_ring->num_desc);
1914 		count++;
1915 	}
1916 	for (ring = 0; ring < adapter->max_rds_rings; ring++) {
1917 		rds_ring = &adapter->recv_ctx->rds_rings[ring];
1918 		if (!list_empty(&sds_ring->free_list[ring])) {
1919 			list_for_each(cur, &sds_ring->free_list[ring]) {
1920 				rxbuf = list_entry(cur, struct qlcnic_rx_buffer,
1921 						   list);
1922 				qlcnic_alloc_rx_skb(adapter, rds_ring, rxbuf);
1923 			}
1924 			spin_lock(&rds_ring->lock);
1925 			list_splice_tail_init(&sds_ring->free_list[ring],
1926 					      &rds_ring->free_list);
1927 			spin_unlock(&rds_ring->lock);
1928 		}
1929 		qlcnic_post_rx_buffers_nodb(adapter, rds_ring, ring);
1930 	}
1931 	if (count) {
1932 		sds_ring->consumer = consumer;
1933 		writel(consumer, sds_ring->crb_sts_consumer);
1934 	}
1935 	return count;
1936 }
1937 
1938 static int qlcnic_83xx_msix_sriov_vf_poll(struct napi_struct *napi, int budget)
1939 {
1940 	int tx_complete;
1941 	int work_done;
1942 	struct qlcnic_host_sds_ring *sds_ring;
1943 	struct qlcnic_adapter *adapter;
1944 	struct qlcnic_host_tx_ring *tx_ring;
1945 
1946 	sds_ring = container_of(napi, struct qlcnic_host_sds_ring, napi);
1947 	adapter = sds_ring->adapter;
1948 	/* tx ring count = 1 */
1949 	tx_ring = adapter->tx_ring;
1950 
1951 	tx_complete = qlcnic_process_cmd_ring(adapter, tx_ring, budget);
1952 	work_done = qlcnic_83xx_process_rcv_ring(sds_ring, budget);
1953 	if ((work_done < budget) && tx_complete) {
1954 		napi_complete(&sds_ring->napi);
1955 		qlcnic_enable_sds_intr(adapter, sds_ring);
1956 	}
1957 
1958 	return work_done;
1959 }
1960 
1961 static int qlcnic_83xx_poll(struct napi_struct *napi, int budget)
1962 {
1963 	int tx_complete;
1964 	int work_done;
1965 	struct qlcnic_host_sds_ring *sds_ring;
1966 	struct qlcnic_adapter *adapter;
1967 	struct qlcnic_host_tx_ring *tx_ring;
1968 
1969 	sds_ring = container_of(napi, struct qlcnic_host_sds_ring, napi);
1970 	adapter = sds_ring->adapter;
1971 	/* tx ring count = 1 */
1972 	tx_ring = adapter->tx_ring;
1973 
1974 	tx_complete = qlcnic_process_cmd_ring(adapter, tx_ring, budget);
1975 	work_done = qlcnic_83xx_process_rcv_ring(sds_ring, budget);
1976 	if ((work_done < budget) && tx_complete) {
1977 		napi_complete(&sds_ring->napi);
1978 		qlcnic_enable_sds_intr(adapter, sds_ring);
1979 	}
1980 
1981 	return work_done;
1982 }
1983 
1984 static int qlcnic_83xx_msix_tx_poll(struct napi_struct *napi, int budget)
1985 {
1986 	int work_done;
1987 	struct qlcnic_host_tx_ring *tx_ring;
1988 	struct qlcnic_adapter *adapter;
1989 
1990 	budget = QLCNIC_TX_POLL_BUDGET;
1991 	tx_ring = container_of(napi, struct qlcnic_host_tx_ring, napi);
1992 	adapter = tx_ring->adapter;
1993 	work_done = qlcnic_process_cmd_ring(adapter, tx_ring, budget);
1994 	if (work_done) {
1995 		napi_complete(&tx_ring->napi);
1996 		if (test_bit(__QLCNIC_DEV_UP , &adapter->state))
1997 			qlcnic_enable_tx_intr(adapter, tx_ring);
1998 	}
1999 
2000 	return work_done;
2001 }
2002 
2003 static int qlcnic_83xx_rx_poll(struct napi_struct *napi, int budget)
2004 {
2005 	int work_done;
2006 	struct qlcnic_host_sds_ring *sds_ring;
2007 	struct qlcnic_adapter *adapter;
2008 
2009 	sds_ring = container_of(napi, struct qlcnic_host_sds_ring, napi);
2010 	adapter = sds_ring->adapter;
2011 	work_done = qlcnic_83xx_process_rcv_ring(sds_ring, budget);
2012 	if (work_done < budget) {
2013 		napi_complete(&sds_ring->napi);
2014 		if (test_bit(__QLCNIC_DEV_UP, &adapter->state))
2015 			qlcnic_enable_sds_intr(adapter, sds_ring);
2016 	}
2017 
2018 	return work_done;
2019 }
2020 
2021 void qlcnic_83xx_napi_enable(struct qlcnic_adapter *adapter)
2022 {
2023 	int ring;
2024 	struct qlcnic_host_sds_ring *sds_ring;
2025 	struct qlcnic_host_tx_ring *tx_ring;
2026 	struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
2027 
2028 	if (adapter->is_up != QLCNIC_ADAPTER_UP_MAGIC)
2029 		return;
2030 
2031 	for (ring = 0; ring < adapter->drv_sds_rings; ring++) {
2032 		sds_ring = &recv_ctx->sds_rings[ring];
2033 		napi_enable(&sds_ring->napi);
2034 		if (adapter->flags & QLCNIC_MSIX_ENABLED)
2035 			qlcnic_enable_sds_intr(adapter, sds_ring);
2036 	}
2037 
2038 	if ((adapter->flags & QLCNIC_MSIX_ENABLED) &&
2039 	    !(adapter->flags & QLCNIC_TX_INTR_SHARED)) {
2040 		for (ring = 0; ring < adapter->drv_tx_rings; ring++) {
2041 			tx_ring = &adapter->tx_ring[ring];
2042 			napi_enable(&tx_ring->napi);
2043 			qlcnic_enable_tx_intr(adapter, tx_ring);
2044 		}
2045 	}
2046 }
2047 
2048 void qlcnic_83xx_napi_disable(struct qlcnic_adapter *adapter)
2049 {
2050 	int ring;
2051 	struct qlcnic_host_sds_ring *sds_ring;
2052 	struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
2053 	struct qlcnic_host_tx_ring *tx_ring;
2054 
2055 	if (adapter->is_up != QLCNIC_ADAPTER_UP_MAGIC)
2056 		return;
2057 
2058 	for (ring = 0; ring < adapter->drv_sds_rings; ring++) {
2059 		sds_ring = &recv_ctx->sds_rings[ring];
2060 		if (adapter->flags & QLCNIC_MSIX_ENABLED)
2061 			qlcnic_disable_sds_intr(adapter, sds_ring);
2062 		napi_synchronize(&sds_ring->napi);
2063 		napi_disable(&sds_ring->napi);
2064 	}
2065 
2066 	if ((adapter->flags & QLCNIC_MSIX_ENABLED) &&
2067 	    !(adapter->flags & QLCNIC_TX_INTR_SHARED)) {
2068 		for (ring = 0; ring < adapter->drv_tx_rings; ring++) {
2069 			tx_ring = &adapter->tx_ring[ring];
2070 			qlcnic_disable_tx_intr(adapter, tx_ring);
2071 			napi_synchronize(&tx_ring->napi);
2072 			napi_disable(&tx_ring->napi);
2073 		}
2074 	}
2075 }
2076 
2077 int qlcnic_83xx_napi_add(struct qlcnic_adapter *adapter,
2078 			 struct net_device *netdev)
2079 {
2080 	int ring;
2081 	struct qlcnic_host_sds_ring *sds_ring;
2082 	struct qlcnic_host_tx_ring *tx_ring;
2083 	struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
2084 
2085 	if (qlcnic_alloc_sds_rings(recv_ctx, adapter->drv_sds_rings))
2086 		return -ENOMEM;
2087 
2088 	for (ring = 0; ring < adapter->drv_sds_rings; ring++) {
2089 		sds_ring = &recv_ctx->sds_rings[ring];
2090 		if (adapter->flags & QLCNIC_MSIX_ENABLED) {
2091 			if (!(adapter->flags & QLCNIC_TX_INTR_SHARED))
2092 				netif_napi_add(netdev, &sds_ring->napi,
2093 					       qlcnic_83xx_rx_poll,
2094 					       NAPI_POLL_WEIGHT);
2095 			else
2096 				netif_napi_add(netdev, &sds_ring->napi,
2097 					       qlcnic_83xx_msix_sriov_vf_poll,
2098 					       NAPI_POLL_WEIGHT);
2099 
2100 		} else {
2101 			netif_napi_add(netdev, &sds_ring->napi,
2102 				       qlcnic_83xx_poll,
2103 				       NAPI_POLL_WEIGHT);
2104 		}
2105 	}
2106 
2107 	if (qlcnic_alloc_tx_rings(adapter, netdev)) {
2108 		qlcnic_free_sds_rings(recv_ctx);
2109 		return -ENOMEM;
2110 	}
2111 
2112 	if ((adapter->flags & QLCNIC_MSIX_ENABLED) &&
2113 	    !(adapter->flags & QLCNIC_TX_INTR_SHARED)) {
2114 		for (ring = 0; ring < adapter->drv_tx_rings; ring++) {
2115 			tx_ring = &adapter->tx_ring[ring];
2116 			netif_napi_add(netdev, &tx_ring->napi,
2117 				       qlcnic_83xx_msix_tx_poll,
2118 				       NAPI_POLL_WEIGHT);
2119 		}
2120 	}
2121 
2122 	return 0;
2123 }
2124 
2125 void qlcnic_83xx_napi_del(struct qlcnic_adapter *adapter)
2126 {
2127 	int ring;
2128 	struct qlcnic_host_sds_ring *sds_ring;
2129 	struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
2130 	struct qlcnic_host_tx_ring *tx_ring;
2131 
2132 	for (ring = 0; ring < adapter->drv_sds_rings; ring++) {
2133 		sds_ring = &recv_ctx->sds_rings[ring];
2134 		netif_napi_del(&sds_ring->napi);
2135 	}
2136 
2137 	qlcnic_free_sds_rings(adapter->recv_ctx);
2138 
2139 	if ((adapter->flags & QLCNIC_MSIX_ENABLED) &&
2140 	    !(adapter->flags & QLCNIC_TX_INTR_SHARED)) {
2141 		for (ring = 0; ring < adapter->drv_tx_rings; ring++) {
2142 			tx_ring = &adapter->tx_ring[ring];
2143 			netif_napi_del(&tx_ring->napi);
2144 		}
2145 	}
2146 
2147 	qlcnic_free_tx_rings(adapter);
2148 }
2149 
2150 static void qlcnic_83xx_process_rcv_diag(struct qlcnic_adapter *adapter,
2151 					 int ring, u64 sts_data[])
2152 {
2153 	struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
2154 	struct sk_buff *skb;
2155 	struct qlcnic_host_rds_ring *rds_ring;
2156 	int index, length;
2157 
2158 	if (unlikely(ring >= adapter->max_rds_rings))
2159 		return;
2160 
2161 	rds_ring = &recv_ctx->rds_rings[ring];
2162 	index = qlcnic_83xx_hndl(sts_data[0]);
2163 	if (unlikely(index >= rds_ring->num_desc))
2164 		return;
2165 
2166 	length = qlcnic_83xx_pktln(sts_data[0]);
2167 
2168 	skb = qlcnic_process_rxbuf(adapter, rds_ring, index, STATUS_CKSUM_OK);
2169 	if (!skb)
2170 		return;
2171 
2172 	if (length > rds_ring->skb_size)
2173 		skb_put(skb, rds_ring->skb_size);
2174 	else
2175 		skb_put(skb, length);
2176 
2177 	if (!qlcnic_check_loopback_buff(skb->data, adapter->mac_addr))
2178 		adapter->ahw->diag_cnt++;
2179 	else
2180 		dump_skb(skb, adapter);
2181 
2182 	dev_kfree_skb_any(skb);
2183 	return;
2184 }
2185 
2186 void qlcnic_83xx_process_rcv_ring_diag(struct qlcnic_host_sds_ring *sds_ring)
2187 {
2188 	struct qlcnic_adapter *adapter = sds_ring->adapter;
2189 	struct status_desc *desc;
2190 	u64 sts_data[2];
2191 	int ring, opcode;
2192 	u32 consumer = sds_ring->consumer;
2193 
2194 	desc = &sds_ring->desc_head[consumer];
2195 	sts_data[0] = le64_to_cpu(desc->status_desc_data[0]);
2196 	sts_data[1] = le64_to_cpu(desc->status_desc_data[1]);
2197 	opcode = qlcnic_83xx_opcode(sts_data[1]);
2198 	if (!opcode)
2199 		return;
2200 
2201 	ring = QLCNIC_FETCH_RING_ID(qlcnic_83xx_hndl(sts_data[0]));
2202 	qlcnic_83xx_process_rcv_diag(adapter, ring, sts_data);
2203 	desc = &sds_ring->desc_head[consumer];
2204 	desc->status_desc_data[0] = cpu_to_le64(STATUS_OWNER_PHANTOM);
2205 	consumer = get_next_index(consumer, sds_ring->num_desc);
2206 	sds_ring->consumer = consumer;
2207 	writel(consumer, sds_ring->crb_sts_consumer);
2208 }
2209