1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3  * QLogic qlcnic NIC Driver
4  * Copyright (c) 2009-2013 QLogic Corporation
5  */
6 
7 #include <linux/netdevice.h>
8 #include <linux/if_vlan.h>
9 #include <net/ip.h>
10 #include <linux/ipv6.h>
11 #include <net/checksum.h>
12 #include <linux/printk.h>
13 #include <linux/jiffies.h>
14 
15 #include "qlcnic.h"
16 
17 #define QLCNIC_TX_ETHER_PKT		0x01
18 #define QLCNIC_TX_TCP_PKT		0x02
19 #define QLCNIC_TX_UDP_PKT		0x03
20 #define QLCNIC_TX_IP_PKT		0x04
21 #define QLCNIC_TX_TCP_LSO		0x05
22 #define QLCNIC_TX_TCP_LSO6		0x06
23 #define QLCNIC_TX_ENCAP_PKT		0x07
24 #define QLCNIC_TX_ENCAP_LSO		0x08
25 #define QLCNIC_TX_TCPV6_PKT		0x0b
26 #define QLCNIC_TX_UDPV6_PKT		0x0c
27 
28 #define QLCNIC_FLAGS_VLAN_TAGGED	0x10
29 #define QLCNIC_FLAGS_VLAN_OOB		0x40
30 
31 #define qlcnic_set_tx_vlan_tci(cmd_desc, v)	\
32 	(cmd_desc)->vlan_TCI = cpu_to_le16(v);
33 #define qlcnic_set_cmd_desc_port(cmd_desc, var)	\
34 	((cmd_desc)->port_ctxid |= ((var) & 0x0F))
35 #define qlcnic_set_cmd_desc_ctxid(cmd_desc, var)	\
36 	((cmd_desc)->port_ctxid |= ((var) << 4 & 0xF0))
37 
38 #define qlcnic_set_tx_port(_desc, _port) \
39 	((_desc)->port_ctxid = ((_port) & 0xf) | (((_port) << 4) & 0xf0))
40 
41 #define qlcnic_set_tx_flags_opcode(_desc, _flags, _opcode) \
42 	((_desc)->flags_opcode |= \
43 	cpu_to_le16(((_flags) & 0x7f) | (((_opcode) & 0x3f) << 7)))
44 
45 #define qlcnic_set_tx_frags_len(_desc, _frags, _len) \
46 	((_desc)->nfrags__length = \
47 	cpu_to_le32(((_frags) & 0xff) | (((_len) & 0xffffff) << 8)))
48 
49 /* owner bits of status_desc */
50 #define STATUS_OWNER_HOST	(0x1ULL << 56)
51 #define STATUS_OWNER_PHANTOM	(0x2ULL << 56)
52 
53 /* Status descriptor:
54    0-3 port, 4-7 status, 8-11 type, 12-27 total_length
55    28-43 reference_handle, 44-47 protocol, 48-52 pkt_offset
56    53-55 desc_cnt, 56-57 owner, 58-63 opcode
57  */
58 #define qlcnic_get_sts_port(sts_data)	\
59 	((sts_data) & 0x0F)
60 #define qlcnic_get_sts_status(sts_data)	\
61 	(((sts_data) >> 4) & 0x0F)
62 #define qlcnic_get_sts_type(sts_data)	\
63 	(((sts_data) >> 8) & 0x0F)
64 #define qlcnic_get_sts_totallength(sts_data)	\
65 	(((sts_data) >> 12) & 0xFFFF)
66 #define qlcnic_get_sts_refhandle(sts_data)	\
67 	(((sts_data) >> 28) & 0xFFFF)
68 #define qlcnic_get_sts_prot(sts_data)	\
69 	(((sts_data) >> 44) & 0x0F)
70 #define qlcnic_get_sts_pkt_offset(sts_data)	\
71 	(((sts_data) >> 48) & 0x1F)
72 #define qlcnic_get_sts_desc_cnt(sts_data)	\
73 	(((sts_data) >> 53) & 0x7)
74 #define qlcnic_get_sts_opcode(sts_data)	\
75 	(((sts_data) >> 58) & 0x03F)
76 
77 #define qlcnic_get_lro_sts_refhandle(sts_data) 	\
78 	((sts_data) & 0x07FFF)
79 #define qlcnic_get_lro_sts_length(sts_data)	\
80 	(((sts_data) >> 16) & 0x0FFFF)
81 #define qlcnic_get_lro_sts_l2_hdr_offset(sts_data)	\
82 	(((sts_data) >> 32) & 0x0FF)
83 #define qlcnic_get_lro_sts_l4_hdr_offset(sts_data)	\
84 	(((sts_data) >> 40) & 0x0FF)
85 #define qlcnic_get_lro_sts_timestamp(sts_data)	\
86 	(((sts_data) >> 48) & 0x1)
87 #define qlcnic_get_lro_sts_type(sts_data)	\
88 	(((sts_data) >> 49) & 0x7)
89 #define qlcnic_get_lro_sts_push_flag(sts_data)		\
90 	(((sts_data) >> 52) & 0x1)
91 #define qlcnic_get_lro_sts_seq_number(sts_data)		\
92 	((sts_data) & 0x0FFFFFFFF)
93 #define qlcnic_get_lro_sts_mss(sts_data1)		\
94 	((sts_data1 >> 32) & 0x0FFFF)
95 
96 #define qlcnic_83xx_get_lro_sts_mss(sts) ((sts) & 0xffff)
97 
98 /* opcode field in status_desc */
99 #define QLCNIC_SYN_OFFLOAD	0x03
100 #define QLCNIC_RXPKT_DESC  	0x04
101 #define QLCNIC_OLD_RXPKT_DESC	0x3f
102 #define QLCNIC_RESPONSE_DESC	0x05
103 #define QLCNIC_LRO_DESC  	0x12
104 
105 #define QLCNIC_TCP_HDR_SIZE		20
106 #define QLCNIC_TCP_TS_OPTION_SIZE	12
107 #define QLCNIC_FETCH_RING_ID(handle)	((handle) >> 63)
108 #define QLCNIC_DESC_OWNER_FW		cpu_to_le64(STATUS_OWNER_PHANTOM)
109 
110 #define QLCNIC_TCP_TS_HDR_SIZE (QLCNIC_TCP_HDR_SIZE + QLCNIC_TCP_TS_OPTION_SIZE)
111 
112 /* for status field in status_desc */
113 #define STATUS_CKSUM_LOOP	0
114 #define STATUS_CKSUM_OK		2
115 
116 #define qlcnic_83xx_pktln(sts)		((sts >> 32) & 0x3FFF)
117 #define qlcnic_83xx_hndl(sts)		((sts >> 48) & 0x7FFF)
118 #define qlcnic_83xx_csum_status(sts)	((sts >> 39) & 7)
119 #define qlcnic_83xx_opcode(sts)	((sts >> 42) & 0xF)
120 #define qlcnic_83xx_vlan_tag(sts)	(((sts) >> 48) & 0xFFFF)
121 #define qlcnic_83xx_lro_pktln(sts)	(((sts) >> 32) & 0x3FFF)
122 #define qlcnic_83xx_l2_hdr_off(sts)	(((sts) >> 16) & 0xFF)
123 #define qlcnic_83xx_l4_hdr_off(sts)	(((sts) >> 24) & 0xFF)
124 #define qlcnic_83xx_pkt_cnt(sts)	(((sts) >> 16) & 0x7)
125 #define qlcnic_83xx_is_tstamp(sts)	(((sts) >> 40) & 1)
126 #define qlcnic_83xx_is_psh_bit(sts)	(((sts) >> 41) & 1)
127 #define qlcnic_83xx_is_ip_align(sts)	(((sts) >> 46) & 1)
128 #define qlcnic_83xx_has_vlan_tag(sts)	(((sts) >> 47) & 1)
129 
130 static int qlcnic_process_rcv_ring(struct qlcnic_host_sds_ring *sds_ring,
131 				   int max);
132 
133 static struct sk_buff *qlcnic_process_rxbuf(struct qlcnic_adapter *,
134 					    struct qlcnic_host_rds_ring *,
135 					    u16, u16);
136 
137 static inline u8 qlcnic_mac_hash(u64 mac, u16 vlan)
138 {
139 	return (u8)((mac & 0xff) ^ ((mac >> 40) & 0xff) ^ (vlan & 0xff));
140 }
141 
142 static inline u32 qlcnic_get_ref_handle(struct qlcnic_adapter *adapter,
143 					u16 handle, u8 ring_id)
144 {
145 	if (qlcnic_83xx_check(adapter))
146 		return handle | (ring_id << 15);
147 	else
148 		return handle;
149 }
150 
151 static inline int qlcnic_82xx_is_lb_pkt(u64 sts_data)
152 {
153 	return (qlcnic_get_sts_status(sts_data) == STATUS_CKSUM_LOOP) ? 1 : 0;
154 }
155 
156 static void qlcnic_delete_rx_list_mac(struct qlcnic_adapter *adapter,
157 				      struct qlcnic_filter *fil,
158 				      void *addr, u16 vlan_id)
159 {
160 	int ret;
161 	u8 op;
162 
163 	op = vlan_id ? QLCNIC_MAC_VLAN_ADD : QLCNIC_MAC_ADD;
164 	ret = qlcnic_sre_macaddr_change(adapter, addr, vlan_id, op);
165 	if (ret)
166 		return;
167 
168 	op = vlan_id ? QLCNIC_MAC_VLAN_DEL : QLCNIC_MAC_DEL;
169 	ret = qlcnic_sre_macaddr_change(adapter, addr, vlan_id, op);
170 	if (!ret) {
171 		hlist_del(&fil->fnode);
172 		adapter->rx_fhash.fnum--;
173 	}
174 }
175 
176 static struct qlcnic_filter *qlcnic_find_mac_filter(struct hlist_head *head,
177 						    void *addr, u16 vlan_id)
178 {
179 	struct qlcnic_filter *tmp_fil = NULL;
180 	struct hlist_node *n;
181 
182 	hlist_for_each_entry_safe(tmp_fil, n, head, fnode) {
183 		if (ether_addr_equal(tmp_fil->faddr, addr) &&
184 		    tmp_fil->vlan_id == vlan_id)
185 			return tmp_fil;
186 	}
187 
188 	return NULL;
189 }
190 
191 static void qlcnic_add_lb_filter(struct qlcnic_adapter *adapter,
192 				 struct sk_buff *skb, int loopback_pkt, u16 vlan_id)
193 {
194 	struct ethhdr *phdr = (struct ethhdr *)(skb->data);
195 	struct qlcnic_filter *fil, *tmp_fil;
196 	struct hlist_head *head;
197 	unsigned long time;
198 	u64 src_addr = 0;
199 	u8 hindex, op;
200 	int ret;
201 
202 	if (!qlcnic_sriov_pf_check(adapter) || (vlan_id == 0xffff))
203 		vlan_id = 0;
204 
205 	memcpy(&src_addr, phdr->h_source, ETH_ALEN);
206 	hindex = qlcnic_mac_hash(src_addr, vlan_id) &
207 		 (adapter->fhash.fbucket_size - 1);
208 
209 	if (loopback_pkt) {
210 		if (adapter->rx_fhash.fnum >= adapter->rx_fhash.fmax)
211 			return;
212 
213 		head = &(adapter->rx_fhash.fhead[hindex]);
214 
215 		tmp_fil = qlcnic_find_mac_filter(head, &src_addr, vlan_id);
216 		if (tmp_fil) {
217 			time = tmp_fil->ftime;
218 			if (time_after(jiffies, QLCNIC_READD_AGE * HZ + time))
219 				tmp_fil->ftime = jiffies;
220 			return;
221 		}
222 
223 		fil = kzalloc(sizeof(struct qlcnic_filter), GFP_ATOMIC);
224 		if (!fil)
225 			return;
226 
227 		fil->ftime = jiffies;
228 		memcpy(fil->faddr, &src_addr, ETH_ALEN);
229 		fil->vlan_id = vlan_id;
230 		spin_lock(&adapter->rx_mac_learn_lock);
231 		hlist_add_head(&(fil->fnode), head);
232 		adapter->rx_fhash.fnum++;
233 		spin_unlock(&adapter->rx_mac_learn_lock);
234 	} else {
235 		head = &adapter->fhash.fhead[hindex];
236 
237 		spin_lock(&adapter->mac_learn_lock);
238 
239 		tmp_fil = qlcnic_find_mac_filter(head, &src_addr, vlan_id);
240 		if (tmp_fil) {
241 			op = vlan_id ? QLCNIC_MAC_VLAN_DEL : QLCNIC_MAC_DEL;
242 			ret = qlcnic_sre_macaddr_change(adapter,
243 							(u8 *)&src_addr,
244 							vlan_id, op);
245 			if (!ret) {
246 				hlist_del(&tmp_fil->fnode);
247 				adapter->fhash.fnum--;
248 			}
249 
250 			spin_unlock(&adapter->mac_learn_lock);
251 
252 			return;
253 		}
254 
255 		spin_unlock(&adapter->mac_learn_lock);
256 
257 		head = &adapter->rx_fhash.fhead[hindex];
258 
259 		spin_lock(&adapter->rx_mac_learn_lock);
260 
261 		tmp_fil = qlcnic_find_mac_filter(head, &src_addr, vlan_id);
262 		if (tmp_fil)
263 			qlcnic_delete_rx_list_mac(adapter, tmp_fil, &src_addr,
264 						  vlan_id);
265 
266 		spin_unlock(&adapter->rx_mac_learn_lock);
267 	}
268 }
269 
270 void qlcnic_82xx_change_filter(struct qlcnic_adapter *adapter, u64 *uaddr,
271 			       u16 vlan_id, struct qlcnic_host_tx_ring *tx_ring)
272 {
273 	struct cmd_desc_type0 *hwdesc;
274 	struct qlcnic_nic_req *req;
275 	struct qlcnic_mac_req *mac_req;
276 	struct qlcnic_vlan_req *vlan_req;
277 	u32 producer;
278 	u64 word;
279 
280 	producer = tx_ring->producer;
281 	hwdesc = &tx_ring->desc_head[tx_ring->producer];
282 
283 	req = (struct qlcnic_nic_req *)hwdesc;
284 	memset(req, 0, sizeof(struct qlcnic_nic_req));
285 	req->qhdr = cpu_to_le64(QLCNIC_REQUEST << 23);
286 
287 	word = QLCNIC_MAC_EVENT | ((u64)(adapter->portnum) << 16);
288 	req->req_hdr = cpu_to_le64(word);
289 
290 	mac_req = (struct qlcnic_mac_req *)&(req->words[0]);
291 	mac_req->op = vlan_id ? QLCNIC_MAC_VLAN_ADD : QLCNIC_MAC_ADD;
292 	memcpy(mac_req->mac_addr, uaddr, ETH_ALEN);
293 
294 	vlan_req = (struct qlcnic_vlan_req *)&req->words[1];
295 	vlan_req->vlan_id = cpu_to_le16(vlan_id);
296 
297 	tx_ring->producer = get_next_index(producer, tx_ring->num_desc);
298 	smp_mb();
299 }
300 
301 static void qlcnic_send_filter(struct qlcnic_adapter *adapter,
302 			       struct cmd_desc_type0 *first_desc,
303 			       struct sk_buff *skb,
304 			       struct qlcnic_host_tx_ring *tx_ring)
305 {
306 	struct vlan_ethhdr *vh = (struct vlan_ethhdr *)(skb->data);
307 	struct ethhdr *phdr = (struct ethhdr *)(skb->data);
308 	u16 protocol = ntohs(skb->protocol);
309 	struct qlcnic_filter *fil, *tmp_fil;
310 	struct hlist_head *head;
311 	struct hlist_node *n;
312 	u64 src_addr = 0;
313 	u16 vlan_id = 0;
314 	u8 hindex, hval;
315 
316 	if (ether_addr_equal(phdr->h_source, adapter->mac_addr))
317 		return;
318 
319 	if (adapter->flags & QLCNIC_VLAN_FILTERING) {
320 		if (protocol == ETH_P_8021Q) {
321 			vh = (struct vlan_ethhdr *)skb->data;
322 			vlan_id = ntohs(vh->h_vlan_TCI);
323 		} else if (skb_vlan_tag_present(skb)) {
324 			vlan_id = skb_vlan_tag_get(skb);
325 		}
326 	}
327 
328 	memcpy(&src_addr, phdr->h_source, ETH_ALEN);
329 	hval = qlcnic_mac_hash(src_addr, vlan_id);
330 	hindex = hval & (adapter->fhash.fbucket_size - 1);
331 	head = &(adapter->fhash.fhead[hindex]);
332 
333 	hlist_for_each_entry_safe(tmp_fil, n, head, fnode) {
334 		if (ether_addr_equal(tmp_fil->faddr, (u8 *)&src_addr) &&
335 		    tmp_fil->vlan_id == vlan_id) {
336 			if (time_is_before_jiffies(QLCNIC_READD_AGE * HZ + tmp_fil->ftime))
337 				qlcnic_change_filter(adapter, &src_addr,
338 						     vlan_id, tx_ring);
339 			tmp_fil->ftime = jiffies;
340 			return;
341 		}
342 	}
343 
344 	if (unlikely(adapter->fhash.fnum >= adapter->fhash.fmax)) {
345 		adapter->stats.mac_filter_limit_overrun++;
346 		return;
347 	}
348 
349 	fil = kzalloc(sizeof(struct qlcnic_filter), GFP_ATOMIC);
350 	if (!fil)
351 		return;
352 
353 	qlcnic_change_filter(adapter, &src_addr, vlan_id, tx_ring);
354 	fil->ftime = jiffies;
355 	fil->vlan_id = vlan_id;
356 	memcpy(fil->faddr, &src_addr, ETH_ALEN);
357 	spin_lock(&adapter->mac_learn_lock);
358 	hlist_add_head(&(fil->fnode), head);
359 	adapter->fhash.fnum++;
360 	spin_unlock(&adapter->mac_learn_lock);
361 }
362 
363 #define QLCNIC_ENCAP_VXLAN_PKT		BIT_0
364 #define QLCNIC_ENCAP_OUTER_L3_IP6	BIT_1
365 #define QLCNIC_ENCAP_INNER_L3_IP6	BIT_2
366 #define QLCNIC_ENCAP_INNER_L4_UDP	BIT_3
367 #define QLCNIC_ENCAP_DO_L3_CSUM		BIT_4
368 #define QLCNIC_ENCAP_DO_L4_CSUM		BIT_5
369 
370 static int qlcnic_tx_encap_pkt(struct qlcnic_adapter *adapter,
371 			       struct cmd_desc_type0 *first_desc,
372 			       struct sk_buff *skb,
373 			       struct qlcnic_host_tx_ring *tx_ring)
374 {
375 	u8 opcode = 0, inner_hdr_len = 0, outer_hdr_len = 0, total_hdr_len = 0;
376 	int copied, copy_len, descr_size;
377 	u32 producer = tx_ring->producer;
378 	struct cmd_desc_type0 *hwdesc;
379 	u16 flags = 0, encap_descr = 0;
380 
381 	opcode = QLCNIC_TX_ETHER_PKT;
382 	encap_descr = QLCNIC_ENCAP_VXLAN_PKT;
383 
384 	if (skb_is_gso(skb)) {
385 		inner_hdr_len = skb_inner_transport_header(skb) +
386 				inner_tcp_hdrlen(skb) -
387 				skb_inner_mac_header(skb);
388 
389 		/* VXLAN header size = 8 */
390 		outer_hdr_len = skb_transport_offset(skb) + 8 +
391 				sizeof(struct udphdr);
392 		first_desc->outer_hdr_length = outer_hdr_len;
393 		total_hdr_len = inner_hdr_len + outer_hdr_len;
394 		encap_descr |= QLCNIC_ENCAP_DO_L3_CSUM |
395 			       QLCNIC_ENCAP_DO_L4_CSUM;
396 		first_desc->mss = cpu_to_le16(skb_shinfo(skb)->gso_size);
397 		first_desc->hdr_length = inner_hdr_len;
398 
399 		/* Copy inner and outer headers in Tx descriptor(s)
400 		 * If total_hdr_len > cmd_desc_type0, use multiple
401 		 * descriptors
402 		 */
403 		copied = 0;
404 		descr_size = (int)sizeof(struct cmd_desc_type0);
405 		while (copied < total_hdr_len) {
406 			copy_len = min(descr_size, (total_hdr_len - copied));
407 			hwdesc = &tx_ring->desc_head[producer];
408 			tx_ring->cmd_buf_arr[producer].skb = NULL;
409 			skb_copy_from_linear_data_offset(skb, copied,
410 							 (char *)hwdesc,
411 							 copy_len);
412 			copied += copy_len;
413 			producer = get_next_index(producer, tx_ring->num_desc);
414 		}
415 
416 		tx_ring->producer = producer;
417 
418 		/* Make sure updated tx_ring->producer is visible
419 		 * for qlcnic_tx_avail()
420 		 */
421 		smp_mb();
422 		adapter->stats.encap_lso_frames++;
423 
424 		opcode = QLCNIC_TX_ENCAP_LSO;
425 	} else if (skb->ip_summed == CHECKSUM_PARTIAL) {
426 		if (inner_ip_hdr(skb)->version == 6) {
427 			if (inner_ipv6_hdr(skb)->nexthdr == IPPROTO_UDP)
428 				encap_descr |= QLCNIC_ENCAP_INNER_L4_UDP;
429 		} else {
430 			if (inner_ip_hdr(skb)->protocol == IPPROTO_UDP)
431 				encap_descr |= QLCNIC_ENCAP_INNER_L4_UDP;
432 		}
433 
434 		adapter->stats.encap_tx_csummed++;
435 		opcode = QLCNIC_TX_ENCAP_PKT;
436 	}
437 
438 	/* Prepare first 16 bits of byte offset 16 of Tx descriptor */
439 	if (ip_hdr(skb)->version == 6)
440 		encap_descr |= QLCNIC_ENCAP_OUTER_L3_IP6;
441 
442 	/* outer IP header's size in 32bit words size*/
443 	encap_descr |= (skb_network_header_len(skb) >> 2) << 6;
444 
445 	/* outer IP header offset */
446 	encap_descr |= skb_network_offset(skb) << 10;
447 	first_desc->encap_descr = cpu_to_le16(encap_descr);
448 
449 	first_desc->tcp_hdr_offset = skb_inner_transport_header(skb) -
450 				     skb->data;
451 	first_desc->ip_hdr_offset = skb_inner_network_offset(skb);
452 
453 	qlcnic_set_tx_flags_opcode(first_desc, flags, opcode);
454 
455 	return 0;
456 }
457 
458 static int qlcnic_tx_pkt(struct qlcnic_adapter *adapter,
459 			 struct cmd_desc_type0 *first_desc, struct sk_buff *skb,
460 			 struct qlcnic_host_tx_ring *tx_ring)
461 {
462 	u8 l4proto, opcode = 0, hdr_len = 0, tag_vlan = 0;
463 	u16 flags = 0, vlan_tci = 0;
464 	int copied, offset, copy_len, size;
465 	struct cmd_desc_type0 *hwdesc;
466 	struct vlan_ethhdr *vh;
467 	u16 protocol = ntohs(skb->protocol);
468 	u32 producer = tx_ring->producer;
469 
470 	if (protocol == ETH_P_8021Q) {
471 		vh = (struct vlan_ethhdr *)skb->data;
472 		flags = QLCNIC_FLAGS_VLAN_TAGGED;
473 		vlan_tci = ntohs(vh->h_vlan_TCI);
474 		protocol = ntohs(vh->h_vlan_encapsulated_proto);
475 		tag_vlan = 1;
476 	} else if (skb_vlan_tag_present(skb)) {
477 		flags = QLCNIC_FLAGS_VLAN_OOB;
478 		vlan_tci = skb_vlan_tag_get(skb);
479 		tag_vlan = 1;
480 	}
481 	if (unlikely(adapter->tx_pvid)) {
482 		if (tag_vlan && !(adapter->flags & QLCNIC_TAGGING_ENABLED))
483 			return -EIO;
484 		if (tag_vlan && (adapter->flags & QLCNIC_TAGGING_ENABLED))
485 			goto set_flags;
486 
487 		flags = QLCNIC_FLAGS_VLAN_OOB;
488 		vlan_tci = adapter->tx_pvid;
489 	}
490 set_flags:
491 	qlcnic_set_tx_vlan_tci(first_desc, vlan_tci);
492 	qlcnic_set_tx_flags_opcode(first_desc, flags, opcode);
493 
494 	if (*(skb->data) & BIT_0) {
495 		flags |= BIT_0;
496 		memcpy(&first_desc->eth_addr, skb->data, ETH_ALEN);
497 	}
498 	opcode = QLCNIC_TX_ETHER_PKT;
499 	if (skb_is_gso(skb)) {
500 		hdr_len = skb_tcp_all_headers(skb);
501 		first_desc->mss = cpu_to_le16(skb_shinfo(skb)->gso_size);
502 		first_desc->hdr_length = hdr_len;
503 		opcode = (protocol == ETH_P_IPV6) ? QLCNIC_TX_TCP_LSO6 :
504 						    QLCNIC_TX_TCP_LSO;
505 
506 		/* For LSO, we need to copy the MAC/IP/TCP headers into
507 		* the descriptor ring */
508 		copied = 0;
509 		offset = 2;
510 
511 		if (flags & QLCNIC_FLAGS_VLAN_OOB) {
512 			first_desc->hdr_length += VLAN_HLEN;
513 			first_desc->tcp_hdr_offset = VLAN_HLEN;
514 			first_desc->ip_hdr_offset = VLAN_HLEN;
515 
516 			/* Only in case of TSO on vlan device */
517 			flags |= QLCNIC_FLAGS_VLAN_TAGGED;
518 
519 			/* Create a TSO vlan header template for firmware */
520 			hwdesc = &tx_ring->desc_head[producer];
521 			tx_ring->cmd_buf_arr[producer].skb = NULL;
522 
523 			copy_len = min((int)sizeof(struct cmd_desc_type0) -
524 				       offset, hdr_len + VLAN_HLEN);
525 
526 			vh = (struct vlan_ethhdr *)((char *) hwdesc + 2);
527 			skb_copy_from_linear_data(skb, vh, 12);
528 			vh->h_vlan_proto = htons(ETH_P_8021Q);
529 			vh->h_vlan_TCI = htons(vlan_tci);
530 
531 			skb_copy_from_linear_data_offset(skb, 12,
532 							 (char *)vh + 16,
533 							 copy_len - 16);
534 			copied = copy_len - VLAN_HLEN;
535 			offset = 0;
536 			producer = get_next_index(producer, tx_ring->num_desc);
537 		}
538 
539 		while (copied < hdr_len) {
540 			size = (int)sizeof(struct cmd_desc_type0) - offset;
541 			copy_len = min(size, (hdr_len - copied));
542 			hwdesc = &tx_ring->desc_head[producer];
543 			tx_ring->cmd_buf_arr[producer].skb = NULL;
544 			skb_copy_from_linear_data_offset(skb, copied,
545 							 (char *)hwdesc +
546 							 offset, copy_len);
547 			copied += copy_len;
548 			offset = 0;
549 			producer = get_next_index(producer, tx_ring->num_desc);
550 		}
551 
552 		tx_ring->producer = producer;
553 		smp_mb();
554 		adapter->stats.lso_frames++;
555 
556 	} else if (skb->ip_summed == CHECKSUM_PARTIAL) {
557 		if (protocol == ETH_P_IP) {
558 			l4proto = ip_hdr(skb)->protocol;
559 
560 			if (l4proto == IPPROTO_TCP)
561 				opcode = QLCNIC_TX_TCP_PKT;
562 			else if (l4proto == IPPROTO_UDP)
563 				opcode = QLCNIC_TX_UDP_PKT;
564 		} else if (protocol == ETH_P_IPV6) {
565 			l4proto = ipv6_hdr(skb)->nexthdr;
566 
567 			if (l4proto == IPPROTO_TCP)
568 				opcode = QLCNIC_TX_TCPV6_PKT;
569 			else if (l4proto == IPPROTO_UDP)
570 				opcode = QLCNIC_TX_UDPV6_PKT;
571 		}
572 	}
573 	first_desc->tcp_hdr_offset += skb_transport_offset(skb);
574 	first_desc->ip_hdr_offset += skb_network_offset(skb);
575 	qlcnic_set_tx_flags_opcode(first_desc, flags, opcode);
576 
577 	return 0;
578 }
579 
580 static int qlcnic_map_tx_skb(struct pci_dev *pdev, struct sk_buff *skb,
581 			     struct qlcnic_cmd_buffer *pbuf)
582 {
583 	struct qlcnic_skb_frag *nf;
584 	skb_frag_t *frag;
585 	int i, nr_frags;
586 	dma_addr_t map;
587 
588 	nr_frags = skb_shinfo(skb)->nr_frags;
589 	nf = &pbuf->frag_array[0];
590 
591 	map = dma_map_single(&pdev->dev, skb->data, skb_headlen(skb),
592 			     DMA_TO_DEVICE);
593 	if (dma_mapping_error(&pdev->dev, map))
594 		goto out_err;
595 
596 	nf->dma = map;
597 	nf->length = skb_headlen(skb);
598 
599 	for (i = 0; i < nr_frags; i++) {
600 		frag = &skb_shinfo(skb)->frags[i];
601 		nf = &pbuf->frag_array[i+1];
602 		map = skb_frag_dma_map(&pdev->dev, frag, 0, skb_frag_size(frag),
603 				       DMA_TO_DEVICE);
604 		if (dma_mapping_error(&pdev->dev, map))
605 			goto unwind;
606 
607 		nf->dma = map;
608 		nf->length = skb_frag_size(frag);
609 	}
610 
611 	return 0;
612 
613 unwind:
614 	while (--i >= 0) {
615 		nf = &pbuf->frag_array[i+1];
616 		dma_unmap_page(&pdev->dev, nf->dma, nf->length, DMA_TO_DEVICE);
617 	}
618 
619 	nf = &pbuf->frag_array[0];
620 	dma_unmap_single(&pdev->dev, nf->dma, skb_headlen(skb), DMA_TO_DEVICE);
621 
622 out_err:
623 	return -ENOMEM;
624 }
625 
626 static void qlcnic_unmap_buffers(struct pci_dev *pdev, struct sk_buff *skb,
627 				 struct qlcnic_cmd_buffer *pbuf)
628 {
629 	struct qlcnic_skb_frag *nf = &pbuf->frag_array[0];
630 	int i, nr_frags = skb_shinfo(skb)->nr_frags;
631 
632 	for (i = 0; i < nr_frags; i++) {
633 		nf = &pbuf->frag_array[i+1];
634 		dma_unmap_page(&pdev->dev, nf->dma, nf->length, DMA_TO_DEVICE);
635 	}
636 
637 	nf = &pbuf->frag_array[0];
638 	dma_unmap_single(&pdev->dev, nf->dma, skb_headlen(skb), DMA_TO_DEVICE);
639 	pbuf->skb = NULL;
640 }
641 
642 static inline void qlcnic_clear_cmddesc(u64 *desc)
643 {
644 	desc[0] = 0ULL;
645 	desc[2] = 0ULL;
646 	desc[7] = 0ULL;
647 }
648 
649 netdev_tx_t qlcnic_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
650 {
651 	struct qlcnic_adapter *adapter = netdev_priv(netdev);
652 	struct qlcnic_host_tx_ring *tx_ring;
653 	struct qlcnic_cmd_buffer *pbuf;
654 	struct qlcnic_skb_frag *buffrag;
655 	struct cmd_desc_type0 *hwdesc, *first_desc;
656 	struct pci_dev *pdev;
657 	struct ethhdr *phdr;
658 	int i, k, frag_count, delta = 0;
659 	u32 producer, num_txd;
660 	u16 protocol;
661 	bool l4_is_udp = false;
662 
663 	if (!test_bit(__QLCNIC_DEV_UP, &adapter->state)) {
664 		netif_tx_stop_all_queues(netdev);
665 		return NETDEV_TX_BUSY;
666 	}
667 
668 	if (adapter->flags & QLCNIC_MACSPOOF) {
669 		phdr = (struct ethhdr *)skb->data;
670 		if (!ether_addr_equal(phdr->h_source, adapter->mac_addr))
671 			goto drop_packet;
672 	}
673 
674 	tx_ring = &adapter->tx_ring[skb_get_queue_mapping(skb)];
675 	num_txd = tx_ring->num_desc;
676 
677 	frag_count = skb_shinfo(skb)->nr_frags + 1;
678 
679 	/* 14 frags supported for normal packet and
680 	 * 32 frags supported for TSO packet
681 	 */
682 	if (!skb_is_gso(skb) && frag_count > QLCNIC_MAX_FRAGS_PER_TX) {
683 		for (i = 0; i < (frag_count - QLCNIC_MAX_FRAGS_PER_TX); i++)
684 			delta += skb_frag_size(&skb_shinfo(skb)->frags[i]);
685 
686 		if (!__pskb_pull_tail(skb, delta))
687 			goto drop_packet;
688 
689 		frag_count = 1 + skb_shinfo(skb)->nr_frags;
690 	}
691 
692 	if (unlikely(qlcnic_tx_avail(tx_ring) <= TX_STOP_THRESH)) {
693 		netif_tx_stop_queue(tx_ring->txq);
694 		if (qlcnic_tx_avail(tx_ring) > TX_STOP_THRESH) {
695 			netif_tx_start_queue(tx_ring->txq);
696 		} else {
697 			tx_ring->tx_stats.xmit_off++;
698 			return NETDEV_TX_BUSY;
699 		}
700 	}
701 
702 	producer = tx_ring->producer;
703 	pbuf = &tx_ring->cmd_buf_arr[producer];
704 	pdev = adapter->pdev;
705 	first_desc = &tx_ring->desc_head[producer];
706 	hwdesc = &tx_ring->desc_head[producer];
707 	qlcnic_clear_cmddesc((u64 *)hwdesc);
708 
709 	if (qlcnic_map_tx_skb(pdev, skb, pbuf)) {
710 		adapter->stats.tx_dma_map_error++;
711 		goto drop_packet;
712 	}
713 
714 	pbuf->skb = skb;
715 	pbuf->frag_count = frag_count;
716 
717 	qlcnic_set_tx_frags_len(first_desc, frag_count, skb->len);
718 	qlcnic_set_tx_port(first_desc, adapter->portnum);
719 
720 	for (i = 0; i < frag_count; i++) {
721 		k = i % 4;
722 
723 		if ((k == 0) && (i > 0)) {
724 			/* move to next desc.*/
725 			producer = get_next_index(producer, num_txd);
726 			hwdesc = &tx_ring->desc_head[producer];
727 			qlcnic_clear_cmddesc((u64 *)hwdesc);
728 			tx_ring->cmd_buf_arr[producer].skb = NULL;
729 		}
730 
731 		buffrag = &pbuf->frag_array[i];
732 		hwdesc->buffer_length[k] = cpu_to_le16(buffrag->length);
733 		switch (k) {
734 		case 0:
735 			hwdesc->addr_buffer1 = cpu_to_le64(buffrag->dma);
736 			break;
737 		case 1:
738 			hwdesc->addr_buffer2 = cpu_to_le64(buffrag->dma);
739 			break;
740 		case 2:
741 			hwdesc->addr_buffer3 = cpu_to_le64(buffrag->dma);
742 			break;
743 		case 3:
744 			hwdesc->addr_buffer4 = cpu_to_le64(buffrag->dma);
745 			break;
746 		}
747 	}
748 
749 	tx_ring->producer = get_next_index(producer, num_txd);
750 	smp_mb();
751 
752 	protocol = ntohs(skb->protocol);
753 	if (protocol == ETH_P_IP)
754 		l4_is_udp = ip_hdr(skb)->protocol == IPPROTO_UDP;
755 	else if (protocol == ETH_P_IPV6)
756 		l4_is_udp = ipv6_hdr(skb)->nexthdr == IPPROTO_UDP;
757 
758 	/* Check if it is a VXLAN packet */
759 	if (!skb->encapsulation || !l4_is_udp ||
760 	    !qlcnic_encap_tx_offload(adapter)) {
761 		if (unlikely(qlcnic_tx_pkt(adapter, first_desc, skb,
762 					   tx_ring)))
763 			goto unwind_buff;
764 	} else {
765 		if (unlikely(qlcnic_tx_encap_pkt(adapter, first_desc,
766 						 skb, tx_ring)))
767 			goto unwind_buff;
768 	}
769 
770 	if (adapter->drv_mac_learn)
771 		qlcnic_send_filter(adapter, first_desc, skb, tx_ring);
772 
773 	tx_ring->tx_stats.tx_bytes += skb->len;
774 	tx_ring->tx_stats.xmit_called++;
775 
776 	/* Ensure writes are complete before HW fetches Tx descriptors */
777 	wmb();
778 	qlcnic_update_cmd_producer(tx_ring);
779 
780 	return NETDEV_TX_OK;
781 
782 unwind_buff:
783 	qlcnic_unmap_buffers(pdev, skb, pbuf);
784 drop_packet:
785 	adapter->stats.txdropped++;
786 	dev_kfree_skb_any(skb);
787 	return NETDEV_TX_OK;
788 }
789 
790 void qlcnic_advert_link_change(struct qlcnic_adapter *adapter, int linkup)
791 {
792 	struct net_device *netdev = adapter->netdev;
793 
794 	if (adapter->ahw->linkup && !linkup) {
795 		netdev_info(netdev, "NIC Link is down\n");
796 		adapter->ahw->linkup = 0;
797 		netif_carrier_off(netdev);
798 	} else if (!adapter->ahw->linkup && linkup) {
799 		adapter->ahw->linkup = 1;
800 
801 		/* Do not advertise Link up to the stack if device
802 		 * is in loopback mode
803 		 */
804 		if (qlcnic_83xx_check(adapter) && adapter->ahw->lb_mode) {
805 			netdev_info(netdev, "NIC Link is up for loopback test\n");
806 			return;
807 		}
808 
809 		netdev_info(netdev, "NIC Link is up\n");
810 		netif_carrier_on(netdev);
811 	}
812 }
813 
814 static int qlcnic_alloc_rx_skb(struct qlcnic_adapter *adapter,
815 			       struct qlcnic_host_rds_ring *rds_ring,
816 			       struct qlcnic_rx_buffer *buffer)
817 {
818 	struct sk_buff *skb;
819 	dma_addr_t dma;
820 	struct pci_dev *pdev = adapter->pdev;
821 
822 	skb = netdev_alloc_skb(adapter->netdev, rds_ring->skb_size);
823 	if (!skb) {
824 		adapter->stats.skb_alloc_failure++;
825 		return -ENOMEM;
826 	}
827 
828 	skb_reserve(skb, NET_IP_ALIGN);
829 	dma = dma_map_single(&pdev->dev, skb->data, rds_ring->dma_size,
830 			     DMA_FROM_DEVICE);
831 
832 	if (dma_mapping_error(&pdev->dev, dma)) {
833 		adapter->stats.rx_dma_map_error++;
834 		dev_kfree_skb_any(skb);
835 		return -ENOMEM;
836 	}
837 
838 	buffer->skb = skb;
839 	buffer->dma = dma;
840 
841 	return 0;
842 }
843 
844 static void qlcnic_post_rx_buffers_nodb(struct qlcnic_adapter *adapter,
845 					struct qlcnic_host_rds_ring *rds_ring,
846 					u8 ring_id)
847 {
848 	struct rcv_desc *pdesc;
849 	struct qlcnic_rx_buffer *buffer;
850 	int  count = 0;
851 	uint32_t producer, handle;
852 	struct list_head *head;
853 
854 	if (!spin_trylock(&rds_ring->lock))
855 		return;
856 
857 	producer = rds_ring->producer;
858 	head = &rds_ring->free_list;
859 	while (!list_empty(head)) {
860 		buffer = list_entry(head->next, struct qlcnic_rx_buffer, list);
861 
862 		if (!buffer->skb) {
863 			if (qlcnic_alloc_rx_skb(adapter, rds_ring, buffer))
864 				break;
865 		}
866 		count++;
867 		list_del(&buffer->list);
868 
869 		/* make a rcv descriptor  */
870 		pdesc = &rds_ring->desc_head[producer];
871 		handle = qlcnic_get_ref_handle(adapter,
872 					       buffer->ref_handle, ring_id);
873 		pdesc->reference_handle = cpu_to_le16(handle);
874 		pdesc->buffer_length = cpu_to_le32(rds_ring->dma_size);
875 		pdesc->addr_buffer = cpu_to_le64(buffer->dma);
876 		producer = get_next_index(producer, rds_ring->num_desc);
877 	}
878 	if (count) {
879 		rds_ring->producer = producer;
880 		writel((producer - 1) & (rds_ring->num_desc - 1),
881 		       rds_ring->crb_rcv_producer);
882 	}
883 	spin_unlock(&rds_ring->lock);
884 }
885 
886 static int qlcnic_process_cmd_ring(struct qlcnic_adapter *adapter,
887 				   struct qlcnic_host_tx_ring *tx_ring,
888 				   int budget)
889 {
890 	u32 sw_consumer, hw_consumer;
891 	int i, done, count = 0;
892 	struct qlcnic_cmd_buffer *buffer;
893 	struct pci_dev *pdev = adapter->pdev;
894 	struct net_device *netdev = adapter->netdev;
895 	struct qlcnic_skb_frag *frag;
896 
897 	if (!spin_trylock(&tx_ring->tx_clean_lock))
898 		return 1;
899 
900 	sw_consumer = tx_ring->sw_consumer;
901 	hw_consumer = le32_to_cpu(*(tx_ring->hw_consumer));
902 
903 	while (sw_consumer != hw_consumer) {
904 		buffer = &tx_ring->cmd_buf_arr[sw_consumer];
905 		if (buffer->skb) {
906 			frag = &buffer->frag_array[0];
907 			dma_unmap_single(&pdev->dev, frag->dma, frag->length,
908 					 DMA_TO_DEVICE);
909 			frag->dma = 0ULL;
910 			for (i = 1; i < buffer->frag_count; i++) {
911 				frag++;
912 				dma_unmap_page(&pdev->dev, frag->dma,
913 					       frag->length, DMA_TO_DEVICE);
914 				frag->dma = 0ULL;
915 			}
916 			tx_ring->tx_stats.xmit_finished++;
917 			dev_kfree_skb_any(buffer->skb);
918 			buffer->skb = NULL;
919 		}
920 
921 		sw_consumer = get_next_index(sw_consumer, tx_ring->num_desc);
922 		if (++count >= budget)
923 			break;
924 	}
925 
926 	tx_ring->sw_consumer = sw_consumer;
927 
928 	if (count && netif_running(netdev)) {
929 		smp_mb();
930 		if (netif_tx_queue_stopped(tx_ring->txq) &&
931 		    netif_carrier_ok(netdev)) {
932 			if (qlcnic_tx_avail(tx_ring) > TX_STOP_THRESH) {
933 				netif_tx_wake_queue(tx_ring->txq);
934 				tx_ring->tx_stats.xmit_on++;
935 			}
936 		}
937 		adapter->tx_timeo_cnt = 0;
938 	}
939 	/*
940 	 * If everything is freed up to consumer then check if the ring is full
941 	 * If the ring is full then check if more needs to be freed and
942 	 * schedule the call back again.
943 	 *
944 	 * This happens when there are 2 CPUs. One could be freeing and the
945 	 * other filling it. If the ring is full when we get out of here and
946 	 * the card has already interrupted the host then the host can miss the
947 	 * interrupt.
948 	 *
949 	 * There is still a possible race condition and the host could miss an
950 	 * interrupt. The card has to take care of this.
951 	 */
952 	hw_consumer = le32_to_cpu(*(tx_ring->hw_consumer));
953 	done = (sw_consumer == hw_consumer);
954 
955 	spin_unlock(&tx_ring->tx_clean_lock);
956 
957 	return done;
958 }
959 
960 static int qlcnic_poll(struct napi_struct *napi, int budget)
961 {
962 	int tx_complete, work_done;
963 	struct qlcnic_host_sds_ring *sds_ring;
964 	struct qlcnic_adapter *adapter;
965 	struct qlcnic_host_tx_ring *tx_ring;
966 
967 	sds_ring = container_of(napi, struct qlcnic_host_sds_ring, napi);
968 	adapter = sds_ring->adapter;
969 	tx_ring = sds_ring->tx_ring;
970 
971 	tx_complete = qlcnic_process_cmd_ring(adapter, tx_ring,
972 					      budget);
973 	work_done = qlcnic_process_rcv_ring(sds_ring, budget);
974 
975 	/* Check if we need a repoll */
976 	if (!tx_complete)
977 		work_done = budget;
978 
979 	if (work_done < budget) {
980 		napi_complete_done(&sds_ring->napi, work_done);
981 		if (test_bit(__QLCNIC_DEV_UP, &adapter->state)) {
982 			qlcnic_enable_sds_intr(adapter, sds_ring);
983 			qlcnic_enable_tx_intr(adapter, tx_ring);
984 		}
985 	}
986 
987 	return work_done;
988 }
989 
990 static int qlcnic_tx_poll(struct napi_struct *napi, int budget)
991 {
992 	struct qlcnic_host_tx_ring *tx_ring;
993 	struct qlcnic_adapter *adapter;
994 	int work_done;
995 
996 	tx_ring = container_of(napi, struct qlcnic_host_tx_ring, napi);
997 	adapter = tx_ring->adapter;
998 
999 	work_done = qlcnic_process_cmd_ring(adapter, tx_ring, budget);
1000 	if (work_done) {
1001 		napi_complete(&tx_ring->napi);
1002 		if (test_bit(__QLCNIC_DEV_UP, &adapter->state))
1003 			qlcnic_enable_tx_intr(adapter, tx_ring);
1004 	} else {
1005 		/* As qlcnic_process_cmd_ring() returned 0, we need a repoll*/
1006 		work_done = budget;
1007 	}
1008 
1009 	return work_done;
1010 }
1011 
1012 static int qlcnic_rx_poll(struct napi_struct *napi, int budget)
1013 {
1014 	struct qlcnic_host_sds_ring *sds_ring;
1015 	struct qlcnic_adapter *adapter;
1016 	int work_done;
1017 
1018 	sds_ring = container_of(napi, struct qlcnic_host_sds_ring, napi);
1019 	adapter = sds_ring->adapter;
1020 
1021 	work_done = qlcnic_process_rcv_ring(sds_ring, budget);
1022 
1023 	if (work_done < budget) {
1024 		napi_complete_done(&sds_ring->napi, work_done);
1025 		if (test_bit(__QLCNIC_DEV_UP, &adapter->state))
1026 			qlcnic_enable_sds_intr(adapter, sds_ring);
1027 	}
1028 
1029 	return work_done;
1030 }
1031 
1032 static void qlcnic_handle_linkevent(struct qlcnic_adapter *adapter,
1033 				    struct qlcnic_fw_msg *msg)
1034 {
1035 	u32 cable_OUI;
1036 	u16 cable_len, link_speed;
1037 	u8  link_status, module, duplex, autoneg, lb_status = 0;
1038 	struct net_device *netdev = adapter->netdev;
1039 
1040 	adapter->ahw->has_link_events = 1;
1041 
1042 	cable_OUI = msg->body[1] & 0xffffffff;
1043 	cable_len = (msg->body[1] >> 32) & 0xffff;
1044 	link_speed = (msg->body[1] >> 48) & 0xffff;
1045 
1046 	link_status = msg->body[2] & 0xff;
1047 	duplex = (msg->body[2] >> 16) & 0xff;
1048 	autoneg = (msg->body[2] >> 24) & 0xff;
1049 	lb_status = (msg->body[2] >> 32) & 0x3;
1050 
1051 	module = (msg->body[2] >> 8) & 0xff;
1052 	if (module == LINKEVENT_MODULE_TWINAX_UNSUPPORTED_CABLE)
1053 		dev_info(&netdev->dev,
1054 			 "unsupported cable: OUI 0x%x, length %d\n",
1055 			 cable_OUI, cable_len);
1056 	else if (module == LINKEVENT_MODULE_TWINAX_UNSUPPORTED_CABLELEN)
1057 		dev_info(&netdev->dev, "unsupported cable length %d\n",
1058 			 cable_len);
1059 
1060 	if (!link_status && (lb_status == QLCNIC_ILB_MODE ||
1061 	    lb_status == QLCNIC_ELB_MODE))
1062 		adapter->ahw->loopback_state |= QLCNIC_LINKEVENT;
1063 
1064 	qlcnic_advert_link_change(adapter, link_status);
1065 
1066 	if (duplex == LINKEVENT_FULL_DUPLEX)
1067 		adapter->ahw->link_duplex = DUPLEX_FULL;
1068 	else
1069 		adapter->ahw->link_duplex = DUPLEX_HALF;
1070 
1071 	adapter->ahw->module_type = module;
1072 	adapter->ahw->link_autoneg = autoneg;
1073 
1074 	if (link_status) {
1075 		adapter->ahw->link_speed = link_speed;
1076 	} else {
1077 		adapter->ahw->link_speed = SPEED_UNKNOWN;
1078 		adapter->ahw->link_duplex = DUPLEX_UNKNOWN;
1079 	}
1080 }
1081 
1082 static void qlcnic_handle_fw_message(int desc_cnt, int index,
1083 				     struct qlcnic_host_sds_ring *sds_ring)
1084 {
1085 	struct qlcnic_fw_msg msg;
1086 	struct status_desc *desc;
1087 	struct qlcnic_adapter *adapter;
1088 	struct device *dev;
1089 	int i = 0, opcode, ret;
1090 
1091 	while (desc_cnt > 0 && i < 8) {
1092 		desc = &sds_ring->desc_head[index];
1093 		msg.words[i++] = le64_to_cpu(desc->status_desc_data[0]);
1094 		msg.words[i++] = le64_to_cpu(desc->status_desc_data[1]);
1095 
1096 		index = get_next_index(index, sds_ring->num_desc);
1097 		desc_cnt--;
1098 	}
1099 
1100 	adapter = sds_ring->adapter;
1101 	dev = &adapter->pdev->dev;
1102 	opcode = qlcnic_get_nic_msg_opcode(msg.body[0]);
1103 
1104 	switch (opcode) {
1105 	case QLCNIC_C2H_OPCODE_GET_LINKEVENT_RESPONSE:
1106 		qlcnic_handle_linkevent(adapter, &msg);
1107 		break;
1108 	case QLCNIC_C2H_OPCODE_CONFIG_LOOPBACK:
1109 		ret = (u32)(msg.body[1]);
1110 		switch (ret) {
1111 		case 0:
1112 			adapter->ahw->loopback_state |= QLCNIC_LB_RESPONSE;
1113 			break;
1114 		case 1:
1115 			dev_info(dev, "loopback already in progress\n");
1116 			adapter->ahw->diag_cnt = -EINPROGRESS;
1117 			break;
1118 		case 2:
1119 			dev_info(dev, "loopback cable is not connected\n");
1120 			adapter->ahw->diag_cnt = -ENODEV;
1121 			break;
1122 		default:
1123 			dev_info(dev,
1124 				 "loopback configure request failed, err %x\n",
1125 				 ret);
1126 			adapter->ahw->diag_cnt = -EIO;
1127 			break;
1128 		}
1129 		break;
1130 	case QLCNIC_C2H_OPCODE_GET_DCB_AEN:
1131 		qlcnic_dcb_aen_handler(adapter->dcb, (void *)&msg);
1132 		break;
1133 	default:
1134 		break;
1135 	}
1136 }
1137 
1138 static struct sk_buff *qlcnic_process_rxbuf(struct qlcnic_adapter *adapter,
1139 					    struct qlcnic_host_rds_ring *ring,
1140 					    u16 index, u16 cksum)
1141 {
1142 	struct qlcnic_rx_buffer *buffer;
1143 	struct sk_buff *skb;
1144 
1145 	buffer = &ring->rx_buf_arr[index];
1146 	if (unlikely(buffer->skb == NULL)) {
1147 		WARN_ON(1);
1148 		return NULL;
1149 	}
1150 
1151 	dma_unmap_single(&adapter->pdev->dev, buffer->dma, ring->dma_size,
1152 			 DMA_FROM_DEVICE);
1153 
1154 	skb = buffer->skb;
1155 	if (likely((adapter->netdev->features & NETIF_F_RXCSUM) &&
1156 		   (cksum == STATUS_CKSUM_OK || cksum == STATUS_CKSUM_LOOP))) {
1157 		adapter->stats.csummed++;
1158 		skb->ip_summed = CHECKSUM_UNNECESSARY;
1159 	} else {
1160 		skb_checksum_none_assert(skb);
1161 	}
1162 
1163 
1164 	buffer->skb = NULL;
1165 
1166 	return skb;
1167 }
1168 
1169 static inline int qlcnic_check_rx_tagging(struct qlcnic_adapter *adapter,
1170 					  struct sk_buff *skb, u16 *vlan_tag)
1171 {
1172 	struct ethhdr *eth_hdr;
1173 
1174 	if (!__vlan_get_tag(skb, vlan_tag)) {
1175 		eth_hdr = (struct ethhdr *)skb->data;
1176 		memmove(skb->data + VLAN_HLEN, eth_hdr, ETH_ALEN * 2);
1177 		skb_pull(skb, VLAN_HLEN);
1178 	}
1179 	if (!adapter->rx_pvid)
1180 		return 0;
1181 
1182 	if (*vlan_tag == adapter->rx_pvid) {
1183 		/* Outer vlan tag. Packet should follow non-vlan path */
1184 		*vlan_tag = 0xffff;
1185 		return 0;
1186 	}
1187 	if (adapter->flags & QLCNIC_TAGGING_ENABLED)
1188 		return 0;
1189 
1190 	return -EINVAL;
1191 }
1192 
1193 static struct qlcnic_rx_buffer *
1194 qlcnic_process_rcv(struct qlcnic_adapter *adapter,
1195 		   struct qlcnic_host_sds_ring *sds_ring, int ring,
1196 		   u64 sts_data0)
1197 {
1198 	struct net_device *netdev = adapter->netdev;
1199 	struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1200 	struct qlcnic_rx_buffer *buffer;
1201 	struct sk_buff *skb;
1202 	struct qlcnic_host_rds_ring *rds_ring;
1203 	int index, length, cksum, pkt_offset, is_lb_pkt;
1204 	u16 vid = 0xffff, t_vid;
1205 
1206 	if (unlikely(ring >= adapter->max_rds_rings))
1207 		return NULL;
1208 
1209 	rds_ring = &recv_ctx->rds_rings[ring];
1210 
1211 	index = qlcnic_get_sts_refhandle(sts_data0);
1212 	if (unlikely(index >= rds_ring->num_desc))
1213 		return NULL;
1214 
1215 	buffer = &rds_ring->rx_buf_arr[index];
1216 	length = qlcnic_get_sts_totallength(sts_data0);
1217 	cksum  = qlcnic_get_sts_status(sts_data0);
1218 	pkt_offset = qlcnic_get_sts_pkt_offset(sts_data0);
1219 
1220 	skb = qlcnic_process_rxbuf(adapter, rds_ring, index, cksum);
1221 	if (!skb)
1222 		return buffer;
1223 
1224 	if (adapter->rx_mac_learn) {
1225 		t_vid = 0;
1226 		is_lb_pkt = qlcnic_82xx_is_lb_pkt(sts_data0);
1227 		qlcnic_add_lb_filter(adapter, skb, is_lb_pkt, t_vid);
1228 	}
1229 
1230 	if (length > rds_ring->skb_size)
1231 		skb_put(skb, rds_ring->skb_size);
1232 	else
1233 		skb_put(skb, length);
1234 
1235 	if (pkt_offset)
1236 		skb_pull(skb, pkt_offset);
1237 
1238 	if (unlikely(qlcnic_check_rx_tagging(adapter, skb, &vid))) {
1239 		adapter->stats.rxdropped++;
1240 		dev_kfree_skb(skb);
1241 		return buffer;
1242 	}
1243 
1244 	skb->protocol = eth_type_trans(skb, netdev);
1245 
1246 	if (vid != 0xffff)
1247 		__vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid);
1248 
1249 	napi_gro_receive(&sds_ring->napi, skb);
1250 
1251 	adapter->stats.rx_pkts++;
1252 	adapter->stats.rxbytes += length;
1253 
1254 	return buffer;
1255 }
1256 
1257 #define QLC_TCP_HDR_SIZE            20
1258 #define QLC_TCP_TS_OPTION_SIZE      12
1259 #define QLC_TCP_TS_HDR_SIZE         (QLC_TCP_HDR_SIZE + QLC_TCP_TS_OPTION_SIZE)
1260 
1261 static struct qlcnic_rx_buffer *
1262 qlcnic_process_lro(struct qlcnic_adapter *adapter,
1263 		   int ring, u64 sts_data0, u64 sts_data1)
1264 {
1265 	struct net_device *netdev = adapter->netdev;
1266 	struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1267 	struct qlcnic_rx_buffer *buffer;
1268 	struct sk_buff *skb;
1269 	struct qlcnic_host_rds_ring *rds_ring;
1270 	struct iphdr *iph;
1271 	struct ipv6hdr *ipv6h;
1272 	struct tcphdr *th;
1273 	bool push, timestamp;
1274 	int index, l2_hdr_offset, l4_hdr_offset, is_lb_pkt;
1275 	u16 lro_length, length, data_offset, t_vid, vid = 0xffff;
1276 	u32 seq_number;
1277 
1278 	if (unlikely(ring >= adapter->max_rds_rings))
1279 		return NULL;
1280 
1281 	rds_ring = &recv_ctx->rds_rings[ring];
1282 
1283 	index = qlcnic_get_lro_sts_refhandle(sts_data0);
1284 	if (unlikely(index >= rds_ring->num_desc))
1285 		return NULL;
1286 
1287 	buffer = &rds_ring->rx_buf_arr[index];
1288 
1289 	timestamp = qlcnic_get_lro_sts_timestamp(sts_data0);
1290 	lro_length = qlcnic_get_lro_sts_length(sts_data0);
1291 	l2_hdr_offset = qlcnic_get_lro_sts_l2_hdr_offset(sts_data0);
1292 	l4_hdr_offset = qlcnic_get_lro_sts_l4_hdr_offset(sts_data0);
1293 	push = qlcnic_get_lro_sts_push_flag(sts_data0);
1294 	seq_number = qlcnic_get_lro_sts_seq_number(sts_data1);
1295 
1296 	skb = qlcnic_process_rxbuf(adapter, rds_ring, index, STATUS_CKSUM_OK);
1297 	if (!skb)
1298 		return buffer;
1299 
1300 	if (adapter->rx_mac_learn) {
1301 		t_vid = 0;
1302 		is_lb_pkt = qlcnic_82xx_is_lb_pkt(sts_data0);
1303 		qlcnic_add_lb_filter(adapter, skb, is_lb_pkt, t_vid);
1304 	}
1305 
1306 	if (timestamp)
1307 		data_offset = l4_hdr_offset + QLC_TCP_TS_HDR_SIZE;
1308 	else
1309 		data_offset = l4_hdr_offset + QLC_TCP_HDR_SIZE;
1310 
1311 	skb_put(skb, lro_length + data_offset);
1312 	skb_pull(skb, l2_hdr_offset);
1313 
1314 	if (unlikely(qlcnic_check_rx_tagging(adapter, skb, &vid))) {
1315 		adapter->stats.rxdropped++;
1316 		dev_kfree_skb(skb);
1317 		return buffer;
1318 	}
1319 
1320 	skb->protocol = eth_type_trans(skb, netdev);
1321 
1322 	if (ntohs(skb->protocol) == ETH_P_IPV6) {
1323 		ipv6h = (struct ipv6hdr *)skb->data;
1324 		th = (struct tcphdr *)(skb->data + sizeof(struct ipv6hdr));
1325 		length = (th->doff << 2) + lro_length;
1326 		ipv6h->payload_len = htons(length);
1327 	} else {
1328 		iph = (struct iphdr *)skb->data;
1329 		th = (struct tcphdr *)(skb->data + (iph->ihl << 2));
1330 		length = (iph->ihl << 2) + (th->doff << 2) + lro_length;
1331 		csum_replace2(&iph->check, iph->tot_len, htons(length));
1332 		iph->tot_len = htons(length);
1333 	}
1334 
1335 	th->psh = push;
1336 	th->seq = htonl(seq_number);
1337 	length = skb->len;
1338 
1339 	if (adapter->flags & QLCNIC_FW_LRO_MSS_CAP) {
1340 		skb_shinfo(skb)->gso_size = qlcnic_get_lro_sts_mss(sts_data1);
1341 		if (skb->protocol == htons(ETH_P_IPV6))
1342 			skb_shinfo(skb)->gso_type = SKB_GSO_TCPV6;
1343 		else
1344 			skb_shinfo(skb)->gso_type = SKB_GSO_TCPV4;
1345 	}
1346 
1347 	if (vid != 0xffff)
1348 		__vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid);
1349 	netif_receive_skb(skb);
1350 
1351 	adapter->stats.lro_pkts++;
1352 	adapter->stats.lrobytes += length;
1353 
1354 	return buffer;
1355 }
1356 
1357 static int qlcnic_process_rcv_ring(struct qlcnic_host_sds_ring *sds_ring, int max)
1358 {
1359 	struct qlcnic_host_rds_ring *rds_ring;
1360 	struct qlcnic_adapter *adapter = sds_ring->adapter;
1361 	struct list_head *cur;
1362 	struct status_desc *desc;
1363 	struct qlcnic_rx_buffer *rxbuf;
1364 	int opcode, desc_cnt, count = 0;
1365 	u64 sts_data0, sts_data1;
1366 	u8 ring;
1367 	u32 consumer = sds_ring->consumer;
1368 
1369 	while (count < max) {
1370 		desc = &sds_ring->desc_head[consumer];
1371 		sts_data0 = le64_to_cpu(desc->status_desc_data[0]);
1372 
1373 		if (!(sts_data0 & STATUS_OWNER_HOST))
1374 			break;
1375 
1376 		desc_cnt = qlcnic_get_sts_desc_cnt(sts_data0);
1377 		opcode = qlcnic_get_sts_opcode(sts_data0);
1378 		switch (opcode) {
1379 		case QLCNIC_RXPKT_DESC:
1380 		case QLCNIC_OLD_RXPKT_DESC:
1381 		case QLCNIC_SYN_OFFLOAD:
1382 			ring = qlcnic_get_sts_type(sts_data0);
1383 			rxbuf = qlcnic_process_rcv(adapter, sds_ring, ring,
1384 						   sts_data0);
1385 			break;
1386 		case QLCNIC_LRO_DESC:
1387 			ring = qlcnic_get_lro_sts_type(sts_data0);
1388 			sts_data1 = le64_to_cpu(desc->status_desc_data[1]);
1389 			rxbuf = qlcnic_process_lro(adapter, ring, sts_data0,
1390 						   sts_data1);
1391 			break;
1392 		case QLCNIC_RESPONSE_DESC:
1393 			qlcnic_handle_fw_message(desc_cnt, consumer, sds_ring);
1394 			goto skip;
1395 		default:
1396 			goto skip;
1397 		}
1398 		WARN_ON(desc_cnt > 1);
1399 
1400 		if (likely(rxbuf))
1401 			list_add_tail(&rxbuf->list, &sds_ring->free_list[ring]);
1402 		else
1403 			adapter->stats.null_rxbuf++;
1404 skip:
1405 		for (; desc_cnt > 0; desc_cnt--) {
1406 			desc = &sds_ring->desc_head[consumer];
1407 			desc->status_desc_data[0] = QLCNIC_DESC_OWNER_FW;
1408 			consumer = get_next_index(consumer, sds_ring->num_desc);
1409 		}
1410 		count++;
1411 	}
1412 
1413 	for (ring = 0; ring < adapter->max_rds_rings; ring++) {
1414 		rds_ring = &adapter->recv_ctx->rds_rings[ring];
1415 		if (!list_empty(&sds_ring->free_list[ring])) {
1416 			list_for_each(cur, &sds_ring->free_list[ring]) {
1417 				rxbuf = list_entry(cur, struct qlcnic_rx_buffer,
1418 						   list);
1419 				qlcnic_alloc_rx_skb(adapter, rds_ring, rxbuf);
1420 			}
1421 			spin_lock(&rds_ring->lock);
1422 			list_splice_tail_init(&sds_ring->free_list[ring],
1423 					      &rds_ring->free_list);
1424 			spin_unlock(&rds_ring->lock);
1425 		}
1426 
1427 		qlcnic_post_rx_buffers_nodb(adapter, rds_ring, ring);
1428 	}
1429 
1430 	if (count) {
1431 		sds_ring->consumer = consumer;
1432 		writel(consumer, sds_ring->crb_sts_consumer);
1433 	}
1434 
1435 	return count;
1436 }
1437 
1438 void qlcnic_post_rx_buffers(struct qlcnic_adapter *adapter,
1439 			    struct qlcnic_host_rds_ring *rds_ring, u8 ring_id)
1440 {
1441 	struct rcv_desc *pdesc;
1442 	struct qlcnic_rx_buffer *buffer;
1443 	int count = 0;
1444 	u32 producer, handle;
1445 	struct list_head *head;
1446 
1447 	producer = rds_ring->producer;
1448 	head = &rds_ring->free_list;
1449 
1450 	while (!list_empty(head)) {
1451 
1452 		buffer = list_entry(head->next, struct qlcnic_rx_buffer, list);
1453 
1454 		if (!buffer->skb) {
1455 			if (qlcnic_alloc_rx_skb(adapter, rds_ring, buffer))
1456 				break;
1457 		}
1458 
1459 		count++;
1460 		list_del(&buffer->list);
1461 
1462 		/* make a rcv descriptor  */
1463 		pdesc = &rds_ring->desc_head[producer];
1464 		pdesc->addr_buffer = cpu_to_le64(buffer->dma);
1465 		handle = qlcnic_get_ref_handle(adapter, buffer->ref_handle,
1466 					       ring_id);
1467 		pdesc->reference_handle = cpu_to_le16(handle);
1468 		pdesc->buffer_length = cpu_to_le32(rds_ring->dma_size);
1469 		producer = get_next_index(producer, rds_ring->num_desc);
1470 	}
1471 
1472 	if (count) {
1473 		rds_ring->producer = producer;
1474 		writel((producer-1) & (rds_ring->num_desc-1),
1475 		       rds_ring->crb_rcv_producer);
1476 	}
1477 }
1478 
1479 static void dump_skb(struct sk_buff *skb, struct qlcnic_adapter *adapter)
1480 {
1481 	if (adapter->ahw->msg_enable & NETIF_MSG_DRV) {
1482 		char prefix[30];
1483 
1484 		scnprintf(prefix, sizeof(prefix), "%s: %s: ",
1485 			  dev_name(&adapter->pdev->dev), __func__);
1486 
1487 		print_hex_dump_debug(prefix, DUMP_PREFIX_NONE, 16, 1,
1488 				     skb->data, skb->len, true);
1489 	}
1490 }
1491 
1492 static void qlcnic_process_rcv_diag(struct qlcnic_adapter *adapter, int ring,
1493 				    u64 sts_data0)
1494 {
1495 	struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1496 	struct sk_buff *skb;
1497 	struct qlcnic_host_rds_ring *rds_ring;
1498 	int index, length, cksum, pkt_offset;
1499 
1500 	if (unlikely(ring >= adapter->max_rds_rings))
1501 		return;
1502 
1503 	rds_ring = &recv_ctx->rds_rings[ring];
1504 
1505 	index = qlcnic_get_sts_refhandle(sts_data0);
1506 	length = qlcnic_get_sts_totallength(sts_data0);
1507 	if (unlikely(index >= rds_ring->num_desc))
1508 		return;
1509 
1510 	cksum  = qlcnic_get_sts_status(sts_data0);
1511 	pkt_offset = qlcnic_get_sts_pkt_offset(sts_data0);
1512 
1513 	skb = qlcnic_process_rxbuf(adapter, rds_ring, index, cksum);
1514 	if (!skb)
1515 		return;
1516 
1517 	if (length > rds_ring->skb_size)
1518 		skb_put(skb, rds_ring->skb_size);
1519 	else
1520 		skb_put(skb, length);
1521 
1522 	if (pkt_offset)
1523 		skb_pull(skb, pkt_offset);
1524 
1525 	if (!qlcnic_check_loopback_buff(skb->data, adapter->mac_addr))
1526 		adapter->ahw->diag_cnt++;
1527 	else
1528 		dump_skb(skb, adapter);
1529 
1530 	dev_kfree_skb_any(skb);
1531 	adapter->stats.rx_pkts++;
1532 	adapter->stats.rxbytes += length;
1533 
1534 	return;
1535 }
1536 
1537 void qlcnic_82xx_process_rcv_ring_diag(struct qlcnic_host_sds_ring *sds_ring)
1538 {
1539 	struct qlcnic_adapter *adapter = sds_ring->adapter;
1540 	struct status_desc *desc;
1541 	u64 sts_data0;
1542 	int ring, opcode, desc_cnt;
1543 
1544 	u32 consumer = sds_ring->consumer;
1545 
1546 	desc = &sds_ring->desc_head[consumer];
1547 	sts_data0 = le64_to_cpu(desc->status_desc_data[0]);
1548 
1549 	if (!(sts_data0 & STATUS_OWNER_HOST))
1550 		return;
1551 
1552 	desc_cnt = qlcnic_get_sts_desc_cnt(sts_data0);
1553 	opcode = qlcnic_get_sts_opcode(sts_data0);
1554 	switch (opcode) {
1555 	case QLCNIC_RESPONSE_DESC:
1556 		qlcnic_handle_fw_message(desc_cnt, consumer, sds_ring);
1557 		break;
1558 	default:
1559 		ring = qlcnic_get_sts_type(sts_data0);
1560 		qlcnic_process_rcv_diag(adapter, ring, sts_data0);
1561 		break;
1562 	}
1563 
1564 	for (; desc_cnt > 0; desc_cnt--) {
1565 		desc = &sds_ring->desc_head[consumer];
1566 		desc->status_desc_data[0] = cpu_to_le64(STATUS_OWNER_PHANTOM);
1567 		consumer = get_next_index(consumer, sds_ring->num_desc);
1568 	}
1569 
1570 	sds_ring->consumer = consumer;
1571 	writel(consumer, sds_ring->crb_sts_consumer);
1572 }
1573 
1574 int qlcnic_82xx_napi_add(struct qlcnic_adapter *adapter,
1575 			 struct net_device *netdev)
1576 {
1577 	int ring;
1578 	struct qlcnic_host_sds_ring *sds_ring;
1579 	struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1580 	struct qlcnic_host_tx_ring *tx_ring;
1581 
1582 	if (qlcnic_alloc_sds_rings(recv_ctx, adapter->drv_sds_rings))
1583 		return -ENOMEM;
1584 
1585 	for (ring = 0; ring < adapter->drv_sds_rings; ring++) {
1586 		sds_ring = &recv_ctx->sds_rings[ring];
1587 		if (qlcnic_check_multi_tx(adapter) &&
1588 		    !adapter->ahw->diag_test) {
1589 			netif_napi_add(netdev, &sds_ring->napi, qlcnic_rx_poll,
1590 				       NAPI_POLL_WEIGHT);
1591 		} else {
1592 			if (ring == (adapter->drv_sds_rings - 1))
1593 				netif_napi_add(netdev, &sds_ring->napi,
1594 					       qlcnic_poll,
1595 					       NAPI_POLL_WEIGHT);
1596 			else
1597 				netif_napi_add(netdev, &sds_ring->napi,
1598 					       qlcnic_rx_poll,
1599 					       NAPI_POLL_WEIGHT);
1600 		}
1601 	}
1602 
1603 	if (qlcnic_alloc_tx_rings(adapter, netdev)) {
1604 		qlcnic_free_sds_rings(recv_ctx);
1605 		return -ENOMEM;
1606 	}
1607 
1608 	if (qlcnic_check_multi_tx(adapter) && !adapter->ahw->diag_test) {
1609 		for (ring = 0; ring < adapter->drv_tx_rings; ring++) {
1610 			tx_ring = &adapter->tx_ring[ring];
1611 			netif_napi_add_tx(netdev, &tx_ring->napi,
1612 					  qlcnic_tx_poll);
1613 		}
1614 	}
1615 
1616 	return 0;
1617 }
1618 
1619 void qlcnic_82xx_napi_del(struct qlcnic_adapter *adapter)
1620 {
1621 	int ring;
1622 	struct qlcnic_host_sds_ring *sds_ring;
1623 	struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1624 	struct qlcnic_host_tx_ring *tx_ring;
1625 
1626 	for (ring = 0; ring < adapter->drv_sds_rings; ring++) {
1627 		sds_ring = &recv_ctx->sds_rings[ring];
1628 		netif_napi_del(&sds_ring->napi);
1629 	}
1630 
1631 	qlcnic_free_sds_rings(adapter->recv_ctx);
1632 
1633 	if (qlcnic_check_multi_tx(adapter) && !adapter->ahw->diag_test) {
1634 		for (ring = 0; ring < adapter->drv_tx_rings; ring++) {
1635 			tx_ring = &adapter->tx_ring[ring];
1636 			netif_napi_del(&tx_ring->napi);
1637 		}
1638 	}
1639 
1640 	qlcnic_free_tx_rings(adapter);
1641 }
1642 
1643 void qlcnic_82xx_napi_enable(struct qlcnic_adapter *adapter)
1644 {
1645 	int ring;
1646 	struct qlcnic_host_sds_ring *sds_ring;
1647 	struct qlcnic_host_tx_ring *tx_ring;
1648 	struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1649 
1650 	if (adapter->is_up != QLCNIC_ADAPTER_UP_MAGIC)
1651 		return;
1652 
1653 	for (ring = 0; ring < adapter->drv_sds_rings; ring++) {
1654 		sds_ring = &recv_ctx->sds_rings[ring];
1655 		napi_enable(&sds_ring->napi);
1656 		qlcnic_enable_sds_intr(adapter, sds_ring);
1657 	}
1658 
1659 	if (qlcnic_check_multi_tx(adapter) &&
1660 	    (adapter->flags & QLCNIC_MSIX_ENABLED) &&
1661 	    !adapter->ahw->diag_test) {
1662 		for (ring = 0; ring < adapter->drv_tx_rings; ring++) {
1663 			tx_ring = &adapter->tx_ring[ring];
1664 			napi_enable(&tx_ring->napi);
1665 			qlcnic_enable_tx_intr(adapter, tx_ring);
1666 		}
1667 	}
1668 }
1669 
1670 void qlcnic_82xx_napi_disable(struct qlcnic_adapter *adapter)
1671 {
1672 	int ring;
1673 	struct qlcnic_host_sds_ring *sds_ring;
1674 	struct qlcnic_host_tx_ring *tx_ring;
1675 	struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1676 
1677 	if (adapter->is_up != QLCNIC_ADAPTER_UP_MAGIC)
1678 		return;
1679 
1680 	for (ring = 0; ring < adapter->drv_sds_rings; ring++) {
1681 		sds_ring = &recv_ctx->sds_rings[ring];
1682 		qlcnic_disable_sds_intr(adapter, sds_ring);
1683 		napi_synchronize(&sds_ring->napi);
1684 		napi_disable(&sds_ring->napi);
1685 	}
1686 
1687 	if ((adapter->flags & QLCNIC_MSIX_ENABLED) &&
1688 	    !adapter->ahw->diag_test &&
1689 	    qlcnic_check_multi_tx(adapter)) {
1690 		for (ring = 0; ring < adapter->drv_tx_rings; ring++) {
1691 			tx_ring = &adapter->tx_ring[ring];
1692 			qlcnic_disable_tx_intr(adapter, tx_ring);
1693 			napi_synchronize(&tx_ring->napi);
1694 			napi_disable(&tx_ring->napi);
1695 		}
1696 	}
1697 }
1698 
1699 #define QLC_83XX_NORMAL_LB_PKT	(1ULL << 36)
1700 #define QLC_83XX_LRO_LB_PKT	(1ULL << 46)
1701 
1702 static inline int qlcnic_83xx_is_lb_pkt(u64 sts_data, int lro_pkt)
1703 {
1704 	if (lro_pkt)
1705 		return (sts_data & QLC_83XX_LRO_LB_PKT) ? 1 : 0;
1706 	else
1707 		return (sts_data & QLC_83XX_NORMAL_LB_PKT) ? 1 : 0;
1708 }
1709 
1710 #define QLCNIC_ENCAP_LENGTH_MASK	0x7f
1711 
1712 static inline u8 qlcnic_encap_length(u64 sts_data)
1713 {
1714 	return sts_data & QLCNIC_ENCAP_LENGTH_MASK;
1715 }
1716 
1717 static struct qlcnic_rx_buffer *
1718 qlcnic_83xx_process_rcv(struct qlcnic_adapter *adapter,
1719 			struct qlcnic_host_sds_ring *sds_ring,
1720 			u8 ring, u64 sts_data[])
1721 {
1722 	struct net_device *netdev = adapter->netdev;
1723 	struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1724 	struct qlcnic_rx_buffer *buffer;
1725 	struct sk_buff *skb;
1726 	struct qlcnic_host_rds_ring *rds_ring;
1727 	int index, length, cksum, is_lb_pkt;
1728 	u16 vid = 0xffff;
1729 	int err;
1730 
1731 	if (unlikely(ring >= adapter->max_rds_rings))
1732 		return NULL;
1733 
1734 	rds_ring = &recv_ctx->rds_rings[ring];
1735 
1736 	index = qlcnic_83xx_hndl(sts_data[0]);
1737 	if (unlikely(index >= rds_ring->num_desc))
1738 		return NULL;
1739 
1740 	buffer = &rds_ring->rx_buf_arr[index];
1741 	length = qlcnic_83xx_pktln(sts_data[0]);
1742 	cksum  = qlcnic_83xx_csum_status(sts_data[1]);
1743 	skb = qlcnic_process_rxbuf(adapter, rds_ring, index, cksum);
1744 	if (!skb)
1745 		return buffer;
1746 
1747 	if (length > rds_ring->skb_size)
1748 		skb_put(skb, rds_ring->skb_size);
1749 	else
1750 		skb_put(skb, length);
1751 
1752 	err = qlcnic_check_rx_tagging(adapter, skb, &vid);
1753 
1754 	if (adapter->rx_mac_learn) {
1755 		is_lb_pkt = qlcnic_83xx_is_lb_pkt(sts_data[1], 0);
1756 		qlcnic_add_lb_filter(adapter, skb, is_lb_pkt, vid);
1757 	}
1758 
1759 	if (unlikely(err)) {
1760 		adapter->stats.rxdropped++;
1761 		dev_kfree_skb(skb);
1762 		return buffer;
1763 	}
1764 
1765 	skb->protocol = eth_type_trans(skb, netdev);
1766 
1767 	if (qlcnic_encap_length(sts_data[1]) &&
1768 	    skb->ip_summed == CHECKSUM_UNNECESSARY) {
1769 		skb->csum_level = 1;
1770 		adapter->stats.encap_rx_csummed++;
1771 	}
1772 
1773 	if (vid != 0xffff)
1774 		__vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid);
1775 
1776 	napi_gro_receive(&sds_ring->napi, skb);
1777 
1778 	adapter->stats.rx_pkts++;
1779 	adapter->stats.rxbytes += length;
1780 
1781 	return buffer;
1782 }
1783 
1784 static struct qlcnic_rx_buffer *
1785 qlcnic_83xx_process_lro(struct qlcnic_adapter *adapter,
1786 			u8 ring, u64 sts_data[])
1787 {
1788 	struct net_device *netdev = adapter->netdev;
1789 	struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1790 	struct qlcnic_rx_buffer *buffer;
1791 	struct sk_buff *skb;
1792 	struct qlcnic_host_rds_ring *rds_ring;
1793 	struct iphdr *iph;
1794 	struct ipv6hdr *ipv6h;
1795 	struct tcphdr *th;
1796 	bool push;
1797 	int l2_hdr_offset, l4_hdr_offset;
1798 	int index, is_lb_pkt;
1799 	u16 lro_length, length, data_offset, gso_size;
1800 	u16 vid = 0xffff;
1801 	int err;
1802 
1803 	if (unlikely(ring >= adapter->max_rds_rings))
1804 		return NULL;
1805 
1806 	rds_ring = &recv_ctx->rds_rings[ring];
1807 
1808 	index = qlcnic_83xx_hndl(sts_data[0]);
1809 	if (unlikely(index >= rds_ring->num_desc))
1810 		return NULL;
1811 
1812 	buffer = &rds_ring->rx_buf_arr[index];
1813 
1814 	lro_length = qlcnic_83xx_lro_pktln(sts_data[0]);
1815 	l2_hdr_offset = qlcnic_83xx_l2_hdr_off(sts_data[1]);
1816 	l4_hdr_offset = qlcnic_83xx_l4_hdr_off(sts_data[1]);
1817 	push = qlcnic_83xx_is_psh_bit(sts_data[1]);
1818 
1819 	skb = qlcnic_process_rxbuf(adapter, rds_ring, index, STATUS_CKSUM_OK);
1820 	if (!skb)
1821 		return buffer;
1822 
1823 	if (qlcnic_83xx_is_tstamp(sts_data[1]))
1824 		data_offset = l4_hdr_offset + QLCNIC_TCP_TS_HDR_SIZE;
1825 	else
1826 		data_offset = l4_hdr_offset + QLCNIC_TCP_HDR_SIZE;
1827 
1828 	skb_put(skb, lro_length + data_offset);
1829 	skb_pull(skb, l2_hdr_offset);
1830 
1831 	err = qlcnic_check_rx_tagging(adapter, skb, &vid);
1832 
1833 	if (adapter->rx_mac_learn) {
1834 		is_lb_pkt = qlcnic_83xx_is_lb_pkt(sts_data[1], 1);
1835 		qlcnic_add_lb_filter(adapter, skb, is_lb_pkt, vid);
1836 	}
1837 
1838 	if (unlikely(err)) {
1839 		adapter->stats.rxdropped++;
1840 		dev_kfree_skb(skb);
1841 		return buffer;
1842 	}
1843 
1844 	skb->protocol = eth_type_trans(skb, netdev);
1845 	if (ntohs(skb->protocol) == ETH_P_IPV6) {
1846 		ipv6h = (struct ipv6hdr *)skb->data;
1847 		th = (struct tcphdr *)(skb->data + sizeof(struct ipv6hdr));
1848 
1849 		length = (th->doff << 2) + lro_length;
1850 		ipv6h->payload_len = htons(length);
1851 	} else {
1852 		iph = (struct iphdr *)skb->data;
1853 		th = (struct tcphdr *)(skb->data + (iph->ihl << 2));
1854 		length = (iph->ihl << 2) + (th->doff << 2) + lro_length;
1855 		csum_replace2(&iph->check, iph->tot_len, htons(length));
1856 		iph->tot_len = htons(length);
1857 	}
1858 
1859 	th->psh = push;
1860 	length = skb->len;
1861 
1862 	if (adapter->flags & QLCNIC_FW_LRO_MSS_CAP) {
1863 		gso_size = qlcnic_83xx_get_lro_sts_mss(sts_data[0]);
1864 		skb_shinfo(skb)->gso_size = gso_size;
1865 		if (skb->protocol == htons(ETH_P_IPV6))
1866 			skb_shinfo(skb)->gso_type = SKB_GSO_TCPV6;
1867 		else
1868 			skb_shinfo(skb)->gso_type = SKB_GSO_TCPV4;
1869 	}
1870 
1871 	if (vid != 0xffff)
1872 		__vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid);
1873 
1874 	netif_receive_skb(skb);
1875 
1876 	adapter->stats.lro_pkts++;
1877 	adapter->stats.lrobytes += length;
1878 	return buffer;
1879 }
1880 
1881 static int qlcnic_83xx_process_rcv_ring(struct qlcnic_host_sds_ring *sds_ring,
1882 					int max)
1883 {
1884 	struct qlcnic_host_rds_ring *rds_ring;
1885 	struct qlcnic_adapter *adapter = sds_ring->adapter;
1886 	struct list_head *cur;
1887 	struct status_desc *desc;
1888 	struct qlcnic_rx_buffer *rxbuf = NULL;
1889 	u8 ring;
1890 	u64 sts_data[2];
1891 	int count = 0, opcode;
1892 	u32 consumer = sds_ring->consumer;
1893 
1894 	while (count < max) {
1895 		desc = &sds_ring->desc_head[consumer];
1896 		sts_data[1] = le64_to_cpu(desc->status_desc_data[1]);
1897 		opcode = qlcnic_83xx_opcode(sts_data[1]);
1898 		if (!opcode)
1899 			break;
1900 		sts_data[0] = le64_to_cpu(desc->status_desc_data[0]);
1901 		ring = QLCNIC_FETCH_RING_ID(sts_data[0]);
1902 
1903 		switch (opcode) {
1904 		case QLC_83XX_REG_DESC:
1905 			rxbuf = qlcnic_83xx_process_rcv(adapter, sds_ring,
1906 							ring, sts_data);
1907 			break;
1908 		case QLC_83XX_LRO_DESC:
1909 			rxbuf = qlcnic_83xx_process_lro(adapter, ring,
1910 							sts_data);
1911 			break;
1912 		default:
1913 			dev_info(&adapter->pdev->dev,
1914 				 "Unknown opcode: 0x%x\n", opcode);
1915 			goto skip;
1916 		}
1917 
1918 		if (likely(rxbuf))
1919 			list_add_tail(&rxbuf->list, &sds_ring->free_list[ring]);
1920 		else
1921 			adapter->stats.null_rxbuf++;
1922 skip:
1923 		desc = &sds_ring->desc_head[consumer];
1924 		/* Reset the descriptor */
1925 		desc->status_desc_data[1] = 0;
1926 		consumer = get_next_index(consumer, sds_ring->num_desc);
1927 		count++;
1928 	}
1929 	for (ring = 0; ring < adapter->max_rds_rings; ring++) {
1930 		rds_ring = &adapter->recv_ctx->rds_rings[ring];
1931 		if (!list_empty(&sds_ring->free_list[ring])) {
1932 			list_for_each(cur, &sds_ring->free_list[ring]) {
1933 				rxbuf = list_entry(cur, struct qlcnic_rx_buffer,
1934 						   list);
1935 				qlcnic_alloc_rx_skb(adapter, rds_ring, rxbuf);
1936 			}
1937 			spin_lock(&rds_ring->lock);
1938 			list_splice_tail_init(&sds_ring->free_list[ring],
1939 					      &rds_ring->free_list);
1940 			spin_unlock(&rds_ring->lock);
1941 		}
1942 		qlcnic_post_rx_buffers_nodb(adapter, rds_ring, ring);
1943 	}
1944 	if (count) {
1945 		sds_ring->consumer = consumer;
1946 		writel(consumer, sds_ring->crb_sts_consumer);
1947 	}
1948 	return count;
1949 }
1950 
1951 static int qlcnic_83xx_msix_sriov_vf_poll(struct napi_struct *napi, int budget)
1952 {
1953 	int tx_complete;
1954 	int work_done;
1955 	struct qlcnic_host_sds_ring *sds_ring;
1956 	struct qlcnic_adapter *adapter;
1957 	struct qlcnic_host_tx_ring *tx_ring;
1958 
1959 	sds_ring = container_of(napi, struct qlcnic_host_sds_ring, napi);
1960 	adapter = sds_ring->adapter;
1961 	/* tx ring count = 1 */
1962 	tx_ring = adapter->tx_ring;
1963 
1964 	tx_complete = qlcnic_process_cmd_ring(adapter, tx_ring, budget);
1965 	work_done = qlcnic_83xx_process_rcv_ring(sds_ring, budget);
1966 
1967 	/* Check if we need a repoll */
1968 	if (!tx_complete)
1969 		work_done = budget;
1970 
1971 	if (work_done < budget) {
1972 		napi_complete_done(&sds_ring->napi, work_done);
1973 		qlcnic_enable_sds_intr(adapter, sds_ring);
1974 	}
1975 
1976 	return work_done;
1977 }
1978 
1979 static int qlcnic_83xx_poll(struct napi_struct *napi, int budget)
1980 {
1981 	int tx_complete;
1982 	int work_done;
1983 	struct qlcnic_host_sds_ring *sds_ring;
1984 	struct qlcnic_adapter *adapter;
1985 	struct qlcnic_host_tx_ring *tx_ring;
1986 
1987 	sds_ring = container_of(napi, struct qlcnic_host_sds_ring, napi);
1988 	adapter = sds_ring->adapter;
1989 	/* tx ring count = 1 */
1990 	tx_ring = adapter->tx_ring;
1991 
1992 	tx_complete = qlcnic_process_cmd_ring(adapter, tx_ring, budget);
1993 	work_done = qlcnic_83xx_process_rcv_ring(sds_ring, budget);
1994 
1995 	/* Check if we need a repoll */
1996 	if (!tx_complete)
1997 		work_done = budget;
1998 
1999 	if (work_done < budget) {
2000 		napi_complete_done(&sds_ring->napi, work_done);
2001 		qlcnic_enable_sds_intr(adapter, sds_ring);
2002 	}
2003 
2004 	return work_done;
2005 }
2006 
2007 static int qlcnic_83xx_msix_tx_poll(struct napi_struct *napi, int budget)
2008 {
2009 	int work_done;
2010 	struct qlcnic_host_tx_ring *tx_ring;
2011 	struct qlcnic_adapter *adapter;
2012 
2013 	tx_ring = container_of(napi, struct qlcnic_host_tx_ring, napi);
2014 	adapter = tx_ring->adapter;
2015 	work_done = qlcnic_process_cmd_ring(adapter, tx_ring, budget);
2016 	if (work_done) {
2017 		napi_complete(&tx_ring->napi);
2018 		if (test_bit(__QLCNIC_DEV_UP , &adapter->state))
2019 			qlcnic_enable_tx_intr(adapter, tx_ring);
2020 	} else {
2021 		/* need a repoll */
2022 		work_done = budget;
2023 	}
2024 
2025 	return work_done;
2026 }
2027 
2028 static int qlcnic_83xx_rx_poll(struct napi_struct *napi, int budget)
2029 {
2030 	int work_done;
2031 	struct qlcnic_host_sds_ring *sds_ring;
2032 	struct qlcnic_adapter *adapter;
2033 
2034 	sds_ring = container_of(napi, struct qlcnic_host_sds_ring, napi);
2035 	adapter = sds_ring->adapter;
2036 	work_done = qlcnic_83xx_process_rcv_ring(sds_ring, budget);
2037 	if (work_done < budget) {
2038 		napi_complete_done(&sds_ring->napi, work_done);
2039 		if (test_bit(__QLCNIC_DEV_UP, &adapter->state))
2040 			qlcnic_enable_sds_intr(adapter, sds_ring);
2041 	}
2042 
2043 	return work_done;
2044 }
2045 
2046 void qlcnic_83xx_napi_enable(struct qlcnic_adapter *adapter)
2047 {
2048 	int ring;
2049 	struct qlcnic_host_sds_ring *sds_ring;
2050 	struct qlcnic_host_tx_ring *tx_ring;
2051 	struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
2052 
2053 	if (adapter->is_up != QLCNIC_ADAPTER_UP_MAGIC)
2054 		return;
2055 
2056 	for (ring = 0; ring < adapter->drv_sds_rings; ring++) {
2057 		sds_ring = &recv_ctx->sds_rings[ring];
2058 		napi_enable(&sds_ring->napi);
2059 		if (adapter->flags & QLCNIC_MSIX_ENABLED)
2060 			qlcnic_enable_sds_intr(adapter, sds_ring);
2061 	}
2062 
2063 	if ((adapter->flags & QLCNIC_MSIX_ENABLED) &&
2064 	    !(adapter->flags & QLCNIC_TX_INTR_SHARED)) {
2065 		for (ring = 0; ring < adapter->drv_tx_rings; ring++) {
2066 			tx_ring = &adapter->tx_ring[ring];
2067 			napi_enable(&tx_ring->napi);
2068 			qlcnic_enable_tx_intr(adapter, tx_ring);
2069 		}
2070 	}
2071 }
2072 
2073 void qlcnic_83xx_napi_disable(struct qlcnic_adapter *adapter)
2074 {
2075 	int ring;
2076 	struct qlcnic_host_sds_ring *sds_ring;
2077 	struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
2078 	struct qlcnic_host_tx_ring *tx_ring;
2079 
2080 	if (adapter->is_up != QLCNIC_ADAPTER_UP_MAGIC)
2081 		return;
2082 
2083 	for (ring = 0; ring < adapter->drv_sds_rings; ring++) {
2084 		sds_ring = &recv_ctx->sds_rings[ring];
2085 		if (adapter->flags & QLCNIC_MSIX_ENABLED)
2086 			qlcnic_disable_sds_intr(adapter, sds_ring);
2087 		napi_synchronize(&sds_ring->napi);
2088 		napi_disable(&sds_ring->napi);
2089 	}
2090 
2091 	if ((adapter->flags & QLCNIC_MSIX_ENABLED) &&
2092 	    !(adapter->flags & QLCNIC_TX_INTR_SHARED)) {
2093 		for (ring = 0; ring < adapter->drv_tx_rings; ring++) {
2094 			tx_ring = &adapter->tx_ring[ring];
2095 			qlcnic_disable_tx_intr(adapter, tx_ring);
2096 			napi_synchronize(&tx_ring->napi);
2097 			napi_disable(&tx_ring->napi);
2098 		}
2099 	}
2100 }
2101 
2102 int qlcnic_83xx_napi_add(struct qlcnic_adapter *adapter,
2103 			 struct net_device *netdev)
2104 {
2105 	int ring;
2106 	struct qlcnic_host_sds_ring *sds_ring;
2107 	struct qlcnic_host_tx_ring *tx_ring;
2108 	struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
2109 
2110 	if (qlcnic_alloc_sds_rings(recv_ctx, adapter->drv_sds_rings))
2111 		return -ENOMEM;
2112 
2113 	for (ring = 0; ring < adapter->drv_sds_rings; ring++) {
2114 		sds_ring = &recv_ctx->sds_rings[ring];
2115 		if (adapter->flags & QLCNIC_MSIX_ENABLED) {
2116 			if (!(adapter->flags & QLCNIC_TX_INTR_SHARED))
2117 				netif_napi_add(netdev, &sds_ring->napi,
2118 					       qlcnic_83xx_rx_poll,
2119 					       NAPI_POLL_WEIGHT);
2120 			else
2121 				netif_napi_add(netdev, &sds_ring->napi,
2122 					       qlcnic_83xx_msix_sriov_vf_poll,
2123 					       NAPI_POLL_WEIGHT);
2124 
2125 		} else {
2126 			netif_napi_add(netdev, &sds_ring->napi,
2127 				       qlcnic_83xx_poll,
2128 				       NAPI_POLL_WEIGHT);
2129 		}
2130 	}
2131 
2132 	if (qlcnic_alloc_tx_rings(adapter, netdev)) {
2133 		qlcnic_free_sds_rings(recv_ctx);
2134 		return -ENOMEM;
2135 	}
2136 
2137 	if ((adapter->flags & QLCNIC_MSIX_ENABLED) &&
2138 	    !(adapter->flags & QLCNIC_TX_INTR_SHARED)) {
2139 		for (ring = 0; ring < adapter->drv_tx_rings; ring++) {
2140 			tx_ring = &adapter->tx_ring[ring];
2141 			netif_napi_add_tx(netdev, &tx_ring->napi,
2142 					  qlcnic_83xx_msix_tx_poll);
2143 		}
2144 	}
2145 
2146 	return 0;
2147 }
2148 
2149 void qlcnic_83xx_napi_del(struct qlcnic_adapter *adapter)
2150 {
2151 	int ring;
2152 	struct qlcnic_host_sds_ring *sds_ring;
2153 	struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
2154 	struct qlcnic_host_tx_ring *tx_ring;
2155 
2156 	for (ring = 0; ring < adapter->drv_sds_rings; ring++) {
2157 		sds_ring = &recv_ctx->sds_rings[ring];
2158 		netif_napi_del(&sds_ring->napi);
2159 	}
2160 
2161 	qlcnic_free_sds_rings(adapter->recv_ctx);
2162 
2163 	if ((adapter->flags & QLCNIC_MSIX_ENABLED) &&
2164 	    !(adapter->flags & QLCNIC_TX_INTR_SHARED)) {
2165 		for (ring = 0; ring < adapter->drv_tx_rings; ring++) {
2166 			tx_ring = &adapter->tx_ring[ring];
2167 			netif_napi_del(&tx_ring->napi);
2168 		}
2169 	}
2170 
2171 	qlcnic_free_tx_rings(adapter);
2172 }
2173 
2174 static void qlcnic_83xx_process_rcv_diag(struct qlcnic_adapter *adapter,
2175 					 int ring, u64 sts_data[])
2176 {
2177 	struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
2178 	struct sk_buff *skb;
2179 	struct qlcnic_host_rds_ring *rds_ring;
2180 	int index, length;
2181 
2182 	if (unlikely(ring >= adapter->max_rds_rings))
2183 		return;
2184 
2185 	rds_ring = &recv_ctx->rds_rings[ring];
2186 	index = qlcnic_83xx_hndl(sts_data[0]);
2187 	if (unlikely(index >= rds_ring->num_desc))
2188 		return;
2189 
2190 	length = qlcnic_83xx_pktln(sts_data[0]);
2191 
2192 	skb = qlcnic_process_rxbuf(adapter, rds_ring, index, STATUS_CKSUM_OK);
2193 	if (!skb)
2194 		return;
2195 
2196 	if (length > rds_ring->skb_size)
2197 		skb_put(skb, rds_ring->skb_size);
2198 	else
2199 		skb_put(skb, length);
2200 
2201 	if (!qlcnic_check_loopback_buff(skb->data, adapter->mac_addr))
2202 		adapter->ahw->diag_cnt++;
2203 	else
2204 		dump_skb(skb, adapter);
2205 
2206 	dev_kfree_skb_any(skb);
2207 	return;
2208 }
2209 
2210 void qlcnic_83xx_process_rcv_ring_diag(struct qlcnic_host_sds_ring *sds_ring)
2211 {
2212 	struct qlcnic_adapter *adapter = sds_ring->adapter;
2213 	struct status_desc *desc;
2214 	u64 sts_data[2];
2215 	int ring, opcode;
2216 	u32 consumer = sds_ring->consumer;
2217 
2218 	desc = &sds_ring->desc_head[consumer];
2219 	sts_data[0] = le64_to_cpu(desc->status_desc_data[0]);
2220 	sts_data[1] = le64_to_cpu(desc->status_desc_data[1]);
2221 	opcode = qlcnic_83xx_opcode(sts_data[1]);
2222 	if (!opcode)
2223 		return;
2224 
2225 	ring = QLCNIC_FETCH_RING_ID(sts_data[0]);
2226 	qlcnic_83xx_process_rcv_diag(adapter, ring, sts_data);
2227 	desc = &sds_ring->desc_head[consumer];
2228 	desc->status_desc_data[0] = cpu_to_le64(STATUS_OWNER_PHANTOM);
2229 	consumer = get_next_index(consumer, sds_ring->num_desc);
2230 	sds_ring->consumer = consumer;
2231 	writel(consumer, sds_ring->crb_sts_consumer);
2232 }
2233