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Merge remote-tracking branch 'asoc/topic/ac97' into asoc-fsl
[deliverable/linux.git] / drivers / net / ethernet / qlogic / qlcnic / qlcnic_io.c
CommitLineData
577ae39d
JK		 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
c70001a9
SC		 8#include <linux/netdevice.h>
9#include <linux/if_vlan.h>
10#include <net/ip.h>
11#include <linux/ipv6.h>
1bcac3b0 12#include <net/checksum.h>
c70001a9
SC		 13
14#include "qlcnic.h"
15
c70001a9
SC		 16#define TX_ETHER_PKT 0x01
17#define TX_TCP_PKT 0x02
18#define TX_UDP_PKT 0x03
19#define TX_IP_PKT 0x04
20#define TX_TCP_LSO 0x05
21#define TX_TCP_LSO6 0x06
22#define TX_TCPV6_PKT 0x0b
23#define TX_UDPV6_PKT 0x0c
24#define FLAGS_VLAN_TAGGED 0x10
25#define FLAGS_VLAN_OOB 0x40
26
27#define qlcnic_set_tx_vlan_tci(cmd_desc, v) \
28 (cmd_desc)->vlan_TCI = cpu_to_le16(v);
29#define qlcnic_set_cmd_desc_port(cmd_desc, var) \
30 ((cmd_desc)->port_ctxid |= ((var) & 0x0F))
31#define qlcnic_set_cmd_desc_ctxid(cmd_desc, var) \
32 ((cmd_desc)->port_ctxid |= ((var) << 4 & 0xF0))
33
34#define qlcnic_set_tx_port(_desc, _port) \
35 ((_desc)->port_ctxid = ((_port) & 0xf) | (((_port) << 4) & 0xf0))
36
37#define qlcnic_set_tx_flags_opcode(_desc, _flags, _opcode) \
38 ((_desc)->flags_opcode |= \
39 cpu_to_le16(((_flags) & 0x7f) | (((_opcode) & 0x3f) << 7)))
40
41#define qlcnic_set_tx_frags_len(_desc, _frags, _len) \
42 ((_desc)->nfrags__length = \
43 cpu_to_le32(((_frags) & 0xff) | (((_len) & 0xffffff) << 8)))
44
45/* owner bits of status_desc */
46#define STATUS_OWNER_HOST (0x1ULL << 56)
47#define STATUS_OWNER_PHANTOM (0x2ULL << 56)
48
49/* Status descriptor:
50 0-3 port, 4-7 status, 8-11 type, 12-27 total_length
51 28-43 reference_handle, 44-47 protocol, 48-52 pkt_offset
52 53-55 desc_cnt, 56-57 owner, 58-63 opcode
53 */
54#define qlcnic_get_sts_port(sts_data) \
55 ((sts_data) & 0x0F)
56#define qlcnic_get_sts_status(sts_data) \
57 (((sts_data) >> 4) & 0x0F)
58#define qlcnic_get_sts_type(sts_data) \
59 (((sts_data) >> 8) & 0x0F)
60#define qlcnic_get_sts_totallength(sts_data) \
61 (((sts_data) >> 12) & 0xFFFF)
62#define qlcnic_get_sts_refhandle(sts_data) \
63 (((sts_data) >> 28) & 0xFFFF)
64#define qlcnic_get_sts_prot(sts_data) \
65 (((sts_data) >> 44) & 0x0F)
66#define qlcnic_get_sts_pkt_offset(sts_data) \
67 (((sts_data) >> 48) & 0x1F)
68#define qlcnic_get_sts_desc_cnt(sts_data) \
69 (((sts_data) >> 53) & 0x7)
70#define qlcnic_get_sts_opcode(sts_data) \
71 (((sts_data) >> 58) & 0x03F)
72
73#define qlcnic_get_lro_sts_refhandle(sts_data) \
5796bd04 74 ((sts_data) & 0x07FFF)
c70001a9
SC		 75#define qlcnic_get_lro_sts_length(sts_data) \
76 (((sts_data) >> 16) & 0x0FFFF)
77#define qlcnic_get_lro_sts_l2_hdr_offset(sts_data) \
78 (((sts_data) >> 32) & 0x0FF)
79#define qlcnic_get_lro_sts_l4_hdr_offset(sts_data) \
80 (((sts_data) >> 40) & 0x0FF)
81#define qlcnic_get_lro_sts_timestamp(sts_data) \
82 (((sts_data) >> 48) & 0x1)
83#define qlcnic_get_lro_sts_type(sts_data) \
84 (((sts_data) >> 49) & 0x7)
85#define qlcnic_get_lro_sts_push_flag(sts_data) \
86 (((sts_data) >> 52) & 0x1)
87#define qlcnic_get_lro_sts_seq_number(sts_data) \
88 ((sts_data) & 0x0FFFFFFFF)
89#define qlcnic_get_lro_sts_mss(sts_data1) \
90 ((sts_data1 >> 32) & 0x0FFFF)
91
99e85879
SS		 92#define qlcnic_83xx_get_lro_sts_mss(sts) ((sts) & 0xffff)
93
c70001a9
SC		 94/* opcode field in status_desc */
95#define QLCNIC_SYN_OFFLOAD 0x03
96#define QLCNIC_RXPKT_DESC 0x04
97#define QLCNIC_OLD_RXPKT_DESC 0x3f
98#define QLCNIC_RESPONSE_DESC 0x05
99#define QLCNIC_LRO_DESC 0x12
100
4be41e92
SC		 101#define QLCNIC_TX_POLL_BUDGET 128
102#define QLCNIC_TCP_HDR_SIZE 20
103#define QLCNIC_TCP_TS_OPTION_SIZE 12
104#define QLCNIC_FETCH_RING_ID(handle) ((handle) >> 63)
105#define QLCNIC_DESC_OWNER_FW cpu_to_le64(STATUS_OWNER_PHANTOM)
106
107#define QLCNIC_TCP_TS_HDR_SIZE (QLCNIC_TCP_HDR_SIZE + QLCNIC_TCP_TS_OPTION_SIZE)
108
c70001a9
SC		 109/* for status field in status_desc */
110#define STATUS_CKSUM_LOOP 0
111#define STATUS_CKSUM_OK 2
d17dd0d9 112
4be41e92
SC		 113#define qlcnic_83xx_pktln(sts) ((sts >> 32) & 0x3FFF)
114#define qlcnic_83xx_hndl(sts) ((sts >> 48) & 0x7FFF)
115#define qlcnic_83xx_csum_status(sts) ((sts >> 39) & 7)
116#define qlcnic_83xx_opcode(sts) ((sts >> 42) & 0xF)
117#define qlcnic_83xx_vlan_tag(sts) (((sts) >> 48) & 0xFFFF)
118#define qlcnic_83xx_lro_pktln(sts) (((sts) >> 32) & 0x3FFF)
119#define qlcnic_83xx_l2_hdr_off(sts) (((sts) >> 16) & 0xFF)
120#define qlcnic_83xx_l4_hdr_off(sts) (((sts) >> 24) & 0xFF)
121#define qlcnic_83xx_pkt_cnt(sts) (((sts) >> 16) & 0x7)
122#define qlcnic_83xx_is_tstamp(sts) (((sts) >> 40) & 1)
123#define qlcnic_83xx_is_psh_bit(sts) (((sts) >> 41) & 1)
124#define qlcnic_83xx_is_ip_align(sts) (((sts) >> 46) & 1)
125#define qlcnic_83xx_has_vlan_tag(sts) (((sts) >> 47) & 1)
126
127struct sk_buff *qlcnic_process_rxbuf(struct qlcnic_adapter *,
128 struct qlcnic_host_rds_ring *, u16, u16);
129
130inline void qlcnic_83xx_enable_tx_intr(struct qlcnic_adapter *adapter,
131 struct qlcnic_host_tx_ring *tx_ring)
132{
133 writel(0, tx_ring->crb_intr_mask);
134}
135
136inline void qlcnic_83xx_disable_tx_intr(struct qlcnic_adapter *adapter,
137 struct qlcnic_host_tx_ring *tx_ring)
138{
139 writel(1, tx_ring->crb_intr_mask);
140}
141
142static inline u8 qlcnic_mac_hash(u64 mac)
143{
144 return (u8)((mac & 0xff) ^ ((mac >> 40) & 0xff));
145}
146
147static inline u32 qlcnic_get_ref_handle(struct qlcnic_adapter *adapter,
148 u16 handle, u8 ring_id)
149{
7cb03b23
RB		 150 unsigned short device = adapter->pdev->device;
151
152 if ((device == PCI_DEVICE_ID_QLOGIC_QLE834X) ||
153 (device == PCI_DEVICE_ID_QLOGIC_VF_QLE834X))
4be41e92
SC		 154 return handle | (ring_id << 15);
155 else
156 return handle;
157}
158
53643a75
SS		 159static inline int qlcnic_82xx_is_lb_pkt(u64 sts_data)
160{
161 return (qlcnic_get_sts_status(sts_data) == STATUS_CKSUM_LOOP) ? 1 : 0;
162}
163
e0d138d9
SS		 164static void qlcnic_delete_rx_list_mac(struct qlcnic_adapter *adapter,
165 struct qlcnic_filter *fil,
166 void *addr, u16 vlan_id)
167{
168 int ret;
169 u8 op;
170
171 op = vlan_id ? QLCNIC_MAC_VLAN_ADD : QLCNIC_MAC_ADD;
172 ret = qlcnic_sre_macaddr_change(adapter, addr, vlan_id, op);
173 if (ret)
174 return;
175
176 op = vlan_id ? QLCNIC_MAC_VLAN_DEL : QLCNIC_MAC_DEL;
177 ret = qlcnic_sre_macaddr_change(adapter, addr, vlan_id, op);
178 if (!ret) {
179 hlist_del(&fil->fnode);
180 adapter->rx_fhash.fnum--;
181 }
182}
183
184static struct qlcnic_filter *qlcnic_find_mac_filter(struct hlist_head *head,
185 void *addr, u16 vlan_id)
186{
187 struct qlcnic_filter *tmp_fil = NULL;
188 struct hlist_node *n;
189
190 hlist_for_each_entry_safe(tmp_fil, n, head, fnode) {
191 if (!memcmp(tmp_fil->faddr, addr, ETH_ALEN) &&
192 tmp_fil->vlan_id == vlan_id)
193 return tmp_fil;
194 }
195
196 return NULL;
197}
198
53643a75 199void qlcnic_add_lb_filter(struct qlcnic_adapter *adapter, struct sk_buff *skb,
f80bc8fe 200 int loopback_pkt, u16 vlan_id)
53643a75
SS		 201{
202 struct ethhdr *phdr = (struct ethhdr *)(skb->data);
203 struct qlcnic_filter *fil, *tmp_fil;
53643a75
SS		 204 struct hlist_head *head;
205 unsigned long time;
206 u64 src_addr = 0;
e0d138d9 207 u8 hindex, op;
53643a75
SS		 208 int ret;
209
210 memcpy(&src_addr, phdr->h_source, ETH_ALEN);
e0d138d9
SS		 211 hindex = qlcnic_mac_hash(src_addr) &
212 (adapter->fhash.fbucket_size - 1);
53643a75
SS		 213
214 if (loopback_pkt) {
215 if (adapter->rx_fhash.fnum >= adapter->rx_fhash.fmax)
216 return;
217
53643a75
SS		 218 head = &(adapter->rx_fhash.fhead[hindex]);
219
e0d138d9
SS		 220 tmp_fil = qlcnic_find_mac_filter(head, &src_addr, vlan_id);
221 if (tmp_fil) {
222 time = tmp_fil->ftime;
223 if (time_after(jiffies, QLCNIC_READD_AGE * HZ + time))
224 tmp_fil->ftime = jiffies;
225 return;
53643a75
SS		 226 }
227
228 fil = kzalloc(sizeof(struct qlcnic_filter), GFP_ATOMIC);
229 if (!fil)
230 return;
231
232 fil->ftime = jiffies;
233 memcpy(fil->faddr, &src_addr, ETH_ALEN);
234 fil->vlan_id = vlan_id;
235 spin_lock(&adapter->rx_mac_learn_lock);
236 hlist_add_head(&(fil->fnode), head);
237 adapter->rx_fhash.fnum++;
238 spin_unlock(&adapter->rx_mac_learn_lock);
239 } else {
e0d138d9 240 head = &adapter->fhash.fhead[hindex];
53643a75 241
e0d138d9 242 spin_lock(&adapter->mac_learn_lock);
53643a75 243
e0d138d9
SS		 244 tmp_fil = qlcnic_find_mac_filter(head, &src_addr, vlan_id);
245 if (tmp_fil) {
53643a75
SS		 246 op = vlan_id ? QLCNIC_MAC_VLAN_DEL : QLCNIC_MAC_DEL;
247 ret = qlcnic_sre_macaddr_change(adapter,
248 (u8 *)&src_addr,
249 vlan_id, op);
250 if (!ret) {
e0d138d9
SS		 251 hlist_del(&tmp_fil->fnode);
252 adapter->fhash.fnum--;
53643a75 253 }
e0d138d9
SS		 254
255 spin_unlock(&adapter->mac_learn_lock);
256
257 return;
53643a75 258 }
e0d138d9
SS		 259
260 spin_unlock(&adapter->mac_learn_lock);
261
262 head = &adapter->rx_fhash.fhead[hindex];
263
264 spin_lock(&adapter->rx_mac_learn_lock);
265
266 tmp_fil = qlcnic_find_mac_filter(head, &src_addr, vlan_id);
267 if (tmp_fil)
268 qlcnic_delete_rx_list_mac(adapter, tmp_fil, &src_addr,
269 vlan_id);
270
53643a75
SS		 271 spin_unlock(&adapter->rx_mac_learn_lock);
272 }
273}
274
7e2cf4fe 275void qlcnic_82xx_change_filter(struct qlcnic_adapter *adapter, u64 *uaddr,
f80bc8fe 276 u16 vlan_id)
c70001a9
SC		 277{
278 struct cmd_desc_type0 *hwdesc;
279 struct qlcnic_nic_req *req;
280 struct qlcnic_mac_req *mac_req;
281 struct qlcnic_vlan_req *vlan_req;
7e2cf4fe 282 struct qlcnic_host_tx_ring *tx_ring = adapter->tx_ring;
c70001a9
SC		 283 u32 producer;
284 u64 word;
285
286 producer = tx_ring->producer;
287 hwdesc = &tx_ring->desc_head[tx_ring->producer];
288
289 req = (struct qlcnic_nic_req *)hwdesc;
290 memset(req, 0, sizeof(struct qlcnic_nic_req));
291 req->qhdr = cpu_to_le64(QLCNIC_REQUEST << 23);
292
293 word = QLCNIC_MAC_EVENT | ((u64)(adapter->portnum) << 16);
294 req->req_hdr = cpu_to_le64(word);
295
296 mac_req = (struct qlcnic_mac_req *)&(req->words[0]);
297 mac_req->op = vlan_id ? QLCNIC_MAC_VLAN_ADD : QLCNIC_MAC_ADD;
4a99ab56 298 memcpy(mac_req->mac_addr, uaddr, ETH_ALEN);
c70001a9
SC		 299
300 vlan_req = (struct qlcnic_vlan_req *)&req->words[1];
f80bc8fe 301 vlan_req->vlan_id = cpu_to_le16(vlan_id);
c70001a9
SC		 302
303 tx_ring->producer = get_next_index(producer, tx_ring->num_desc);
304 smp_mb();
305}
306
d17dd0d9 307static void qlcnic_send_filter(struct qlcnic_adapter *adapter,
d17dd0d9
SC		 308 struct cmd_desc_type0 *first_desc,
309 struct sk_buff *skb)
c70001a9 310{
c70001a9 311 struct qlcnic_filter *fil, *tmp_fil;
b67bfe0d 312 struct hlist_node *n;
c70001a9 313 struct hlist_head *head;
4be41e92 314 struct net_device *netdev = adapter->netdev;
7e2cf4fe 315 struct ethhdr *phdr = (struct ethhdr *)(skb->data);
c70001a9 316 u64 src_addr = 0;
f80bc8fe 317 u16 vlan_id = 0;
c70001a9
SC		 318 u8 hindex;
319
4be41e92 320 if (ether_addr_equal(phdr->h_source, adapter->mac_addr))
c70001a9
SC		 321 return;
322
4be41e92
SC		 323 if (adapter->fhash.fnum >= adapter->fhash.fmax) {
324 adapter->stats.mac_filter_limit_overrun++;
325 netdev_info(netdev, "Can not add more than %d mac addresses\n",
326 adapter->fhash.fmax);
c70001a9 327 return;
4be41e92 328 }
c70001a9 329
c70001a9 330 memcpy(&src_addr, phdr->h_source, ETH_ALEN);
4be41e92 331 hindex = qlcnic_mac_hash(src_addr) & (adapter->fhash.fbucket_size - 1);
c70001a9
SC		 332 head = &(adapter->fhash.fhead[hindex]);
333
b67bfe0d 334 hlist_for_each_entry_safe(tmp_fil, n, head, fnode) {
c70001a9 335 if (!memcmp(tmp_fil->faddr, &src_addr, ETH_ALEN) &&
7e2cf4fe 336 tmp_fil->vlan_id == vlan_id) {
d17dd0d9 337 if (jiffies > (QLCNIC_READD_AGE * HZ + tmp_fil->ftime))
7e2cf4fe
SC		 338 qlcnic_change_filter(adapter, &src_addr,
339 vlan_id);
c70001a9
SC		 340 tmp_fil->ftime = jiffies;
341 return;
342 }
343 }
344
345 fil = kzalloc(sizeof(struct qlcnic_filter), GFP_ATOMIC);
346 if (!fil)
347 return;
348
7e2cf4fe 349 qlcnic_change_filter(adapter, &src_addr, vlan_id);
c70001a9
SC		 350 fil->ftime = jiffies;
351 fil->vlan_id = vlan_id;
352 memcpy(fil->faddr, &src_addr, ETH_ALEN);
353 spin_lock(&adapter->mac_learn_lock);
354 hlist_add_head(&(fil->fnode), head);
355 adapter->fhash.fnum++;
356 spin_unlock(&adapter->mac_learn_lock);
357}
358
d17dd0d9
SC		 359static int qlcnic_tx_pkt(struct qlcnic_adapter *adapter,
360 struct cmd_desc_type0 *first_desc, struct sk_buff *skb)
c70001a9 361{
d17dd0d9 362 u8 l4proto, opcode = 0, hdr_len = 0;
c70001a9 363 u16 flags = 0, vlan_tci = 0;
d17dd0d9 364 int copied, offset, copy_len, size;
c70001a9
SC		 365 struct cmd_desc_type0 *hwdesc;
366 struct vlan_ethhdr *vh;
367 struct qlcnic_host_tx_ring *tx_ring = adapter->tx_ring;
368 u16 protocol = ntohs(skb->protocol);
369 u32 producer = tx_ring->producer;
370
371 if (protocol == ETH_P_8021Q) {
372 vh = (struct vlan_ethhdr *)skb->data;
373 flags = FLAGS_VLAN_TAGGED;
374 vlan_tci = ntohs(vh->h_vlan_TCI);
375 protocol = ntohs(vh->h_vlan_encapsulated_proto);
376 } else if (vlan_tx_tag_present(skb)) {
377 flags = FLAGS_VLAN_OOB;
378 vlan_tci = vlan_tx_tag_get(skb);
379 }
91b7282b 380 if (unlikely(adapter->tx_pvid)) {
c70001a9
SC		 381 if (vlan_tci && !(adapter->flags & QLCNIC_TAGGING_ENABLED))
382 return -EIO;
383 if (vlan_tci && (adapter->flags & QLCNIC_TAGGING_ENABLED))
384 goto set_flags;
385
386 flags = FLAGS_VLAN_OOB;
91b7282b 387 vlan_tci = adapter->tx_pvid;
c70001a9
SC		 388 }
389set_flags:
390 qlcnic_set_tx_vlan_tci(first_desc, vlan_tci);
391 qlcnic_set_tx_flags_opcode(first_desc, flags, opcode);
392
393 if (*(skb->data) & BIT_0) {
394 flags |= BIT_0;
395 memcpy(&first_desc->eth_addr, skb->data, ETH_ALEN);
396 }
397 opcode = TX_ETHER_PKT;
3eead213 398 if (skb_is_gso(skb)) {
c70001a9 399 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
c70001a9
SC		 400 first_desc->mss = cpu_to_le16(skb_shinfo(skb)->gso_size);
401 first_desc->total_hdr_length = hdr_len;
c70001a9
SC		 402 opcode = (protocol == ETH_P_IPV6) ? TX_TCP_LSO6 : TX_TCP_LSO;
403
404 /* For LSO, we need to copy the MAC/IP/TCP headers into
405 * the descriptor ring */
406 copied = 0;
407 offset = 2;
408
409 if (flags & FLAGS_VLAN_OOB) {
410 first_desc->total_hdr_length += VLAN_HLEN;
411 first_desc->tcp_hdr_offset = VLAN_HLEN;
412 first_desc->ip_hdr_offset = VLAN_HLEN;
d17dd0d9 413
c70001a9
SC		 414 /* Only in case of TSO on vlan device */
415 flags |= FLAGS_VLAN_TAGGED;
416
417 /* Create a TSO vlan header template for firmware */
c70001a9
SC		 418 hwdesc = &tx_ring->desc_head[producer];
419 tx_ring->cmd_buf_arr[producer].skb = NULL;
420
421 copy_len = min((int)sizeof(struct cmd_desc_type0) -
d17dd0d9 422 offset, hdr_len + VLAN_HLEN);
c70001a9
SC		 423
424 vh = (struct vlan_ethhdr *)((char *) hwdesc + 2);
425 skb_copy_from_linear_data(skb, vh, 12);
426 vh->h_vlan_proto = htons(ETH_P_8021Q);
427 vh->h_vlan_TCI = htons(vlan_tci);
428
429 skb_copy_from_linear_data_offset(skb, 12,
d17dd0d9
SC		 430 (char *)vh + 16,
431 copy_len - 16);
c70001a9
SC		 432 copied = copy_len - VLAN_HLEN;
433 offset = 0;
c70001a9
SC		 434 producer = get_next_index(producer, tx_ring->num_desc);
435 }
436
437 while (copied < hdr_len) {
d17dd0d9
SC		 438 size = (int)sizeof(struct cmd_desc_type0) - offset;
439 copy_len = min(size, (hdr_len - copied));
c70001a9
SC		 440 hwdesc = &tx_ring->desc_head[producer];
441 tx_ring->cmd_buf_arr[producer].skb = NULL;
c70001a9 442 skb_copy_from_linear_data_offset(skb, copied,
d17dd0d9
SC		 443 (char *)hwdesc +
444 offset, copy_len);
c70001a9
SC		 445 copied += copy_len;
446 offset = 0;
c70001a9
SC		 447 producer = get_next_index(producer, tx_ring->num_desc);
448 }
449
450 tx_ring->producer = producer;
451 smp_mb();
452 adapter->stats.lso_frames++;
453
454 } else if (skb->ip_summed == CHECKSUM_PARTIAL) {
c70001a9
SC		 455 if (protocol == ETH_P_IP) {
456 l4proto = ip_hdr(skb)->protocol;
457
458 if (l4proto == IPPROTO_TCP)
459 opcode = TX_TCP_PKT;
460 else if (l4proto == IPPROTO_UDP)
461 opcode = TX_UDP_PKT;
462 } else if (protocol == ETH_P_IPV6) {
463 l4proto = ipv6_hdr(skb)->nexthdr;
464
465 if (l4proto == IPPROTO_TCP)
466 opcode = TX_TCPV6_PKT;
467 else if (l4proto == IPPROTO_UDP)
468 opcode = TX_UDPV6_PKT;
469 }
470 }
471 first_desc->tcp_hdr_offset += skb_transport_offset(skb);
472 first_desc->ip_hdr_offset += skb_network_offset(skb);
473 qlcnic_set_tx_flags_opcode(first_desc, flags, opcode);
474
475 return 0;
476}
477
d17dd0d9
SC		 478static int qlcnic_map_tx_skb(struct pci_dev *pdev, struct sk_buff *skb,
479 struct qlcnic_cmd_buffer *pbuf)
c70001a9
SC		 480{
481 struct qlcnic_skb_frag *nf;
482 struct skb_frag_struct *frag;
483 int i, nr_frags;
484 dma_addr_t map;
485
486 nr_frags = skb_shinfo(skb)->nr_frags;
487 nf = &pbuf->frag_array[0];
488
d17dd0d9
SC		 489 map = pci_map_single(pdev, skb->data, skb_headlen(skb),
490 PCI_DMA_TODEVICE);
c70001a9
SC		 491 if (pci_dma_mapping_error(pdev, map))
492 goto out_err;
493
494 nf->dma = map;
495 nf->length = skb_headlen(skb);
496
497 for (i = 0; i < nr_frags; i++) {
498 frag = &skb_shinfo(skb)->frags[i];
499 nf = &pbuf->frag_array[i+1];
c70001a9
SC		 500 map = skb_frag_dma_map(&pdev->dev, frag, 0, skb_frag_size(frag),
501 DMA_TO_DEVICE);
502 if (dma_mapping_error(&pdev->dev, map))
503 goto unwind;
504
505 nf->dma = map;
506 nf->length = skb_frag_size(frag);
507 }
508
509 return 0;
510
511unwind:
512 while (--i >= 0) {
513 nf = &pbuf->frag_array[i+1];
514 pci_unmap_page(pdev, nf->dma, nf->length, PCI_DMA_TODEVICE);
515 }
516
517 nf = &pbuf->frag_array[0];
518 pci_unmap_single(pdev, nf->dma, skb_headlen(skb), PCI_DMA_TODEVICE);
519
520out_err:
521 return -ENOMEM;
522}
523
d17dd0d9
SC		 524static void qlcnic_unmap_buffers(struct pci_dev *pdev, struct sk_buff *skb,
525 struct qlcnic_cmd_buffer *pbuf)
c70001a9
SC		 526{
527 struct qlcnic_skb_frag *nf = &pbuf->frag_array[0];
d17dd0d9 528 int i, nr_frags = skb_shinfo(skb)->nr_frags;
c70001a9
SC		 529
530 for (i = 0; i < nr_frags; i++) {
531 nf = &pbuf->frag_array[i+1];
532 pci_unmap_page(pdev, nf->dma, nf->length, PCI_DMA_TODEVICE);
533 }
534
535 nf = &pbuf->frag_array[0];
536 pci_unmap_single(pdev, nf->dma, skb_headlen(skb), PCI_DMA_TODEVICE);
537 pbuf->skb = NULL;
538}
539
d17dd0d9 540static inline void qlcnic_clear_cmddesc(u64 *desc)
c70001a9
SC		 541{
542 desc[0] = 0ULL;
543 desc[2] = 0ULL;
544 desc[7] = 0ULL;
545}
546
d17dd0d9 547netdev_tx_t qlcnic_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
c70001a9
SC		 548{
549 struct qlcnic_adapter *adapter = netdev_priv(netdev);
550 struct qlcnic_host_tx_ring *tx_ring = adapter->tx_ring;
551 struct qlcnic_cmd_buffer *pbuf;
552 struct qlcnic_skb_frag *buffrag;
553 struct cmd_desc_type0 *hwdesc, *first_desc;
554 struct pci_dev *pdev;
555 struct ethhdr *phdr;
d17dd0d9
SC		 556 int i, k, frag_count, delta = 0;
557 u32 producer, num_txd;
c70001a9 558
d17dd0d9 559 num_txd = tx_ring->num_desc;
c70001a9
SC		 560
561 if (!test_bit(__QLCNIC_DEV_UP, &adapter->state)) {
562 netif_stop_queue(netdev);
563 return NETDEV_TX_BUSY;
564 }
565
566 if (adapter->flags & QLCNIC_MACSPOOF) {
567 phdr = (struct ethhdr *)skb->data;
568 if (!ether_addr_equal(phdr->h_source, adapter->mac_addr))
569 goto drop_packet;
570 }
571
572 frag_count = skb_shinfo(skb)->nr_frags + 1;
573 /* 14 frags supported for normal packet and
574 * 32 frags supported for TSO packet
575 */
576 if (!skb_is_gso(skb) && frag_count > QLCNIC_MAX_FRAGS_PER_TX) {
c70001a9
SC		 577 for (i = 0; i < (frag_count - QLCNIC_MAX_FRAGS_PER_TX); i++)
578 delta += skb_frag_size(&skb_shinfo(skb)->frags[i]);
579
580 if (!__pskb_pull_tail(skb, delta))
581 goto drop_packet;
582
583 frag_count = 1 + skb_shinfo(skb)->nr_frags;
584 }
585
586 if (unlikely(qlcnic_tx_avail(tx_ring) <= TX_STOP_THRESH)) {
587 netif_stop_queue(netdev);
d17dd0d9 588 if (qlcnic_tx_avail(tx_ring) > TX_STOP_THRESH) {
c70001a9 589 netif_start_queue(netdev);
d17dd0d9 590 } else {
c70001a9
SC		 591 adapter->stats.xmit_off++;
592 return NETDEV_TX_BUSY;
593 }
594 }
595
596 producer = tx_ring->producer;
597 pbuf = &tx_ring->cmd_buf_arr[producer];
c70001a9 598 pdev = adapter->pdev;
d17dd0d9
SC		 599 first_desc = &tx_ring->desc_head[producer];
600 hwdesc = &tx_ring->desc_head[producer];
c70001a9
SC		 601 qlcnic_clear_cmddesc((u64 *)hwdesc);
602
603 if (qlcnic_map_tx_skb(pdev, skb, pbuf)) {
604 adapter->stats.tx_dma_map_error++;
605 goto drop_packet;
606 }
607
608 pbuf->skb = skb;
609 pbuf->frag_count = frag_count;
610
611 qlcnic_set_tx_frags_len(first_desc, frag_count, skb->len);
612 qlcnic_set_tx_port(first_desc, adapter->portnum);
613
614 for (i = 0; i < frag_count; i++) {
c70001a9
SC		 615 k = i % 4;
616
617 if ((k == 0) && (i > 0)) {
618 /* move to next desc.*/
619 producer = get_next_index(producer, num_txd);
620 hwdesc = &tx_ring->desc_head[producer];
621 qlcnic_clear_cmddesc((u64 *)hwdesc);
622 tx_ring->cmd_buf_arr[producer].skb = NULL;
623 }
624
625 buffrag = &pbuf->frag_array[i];
c70001a9
SC		 626 hwdesc->buffer_length[k] = cpu_to_le16(buffrag->length);
627 switch (k) {
628 case 0:
629 hwdesc->addr_buffer1 = cpu_to_le64(buffrag->dma);
630 break;
631 case 1:
632 hwdesc->addr_buffer2 = cpu_to_le64(buffrag->dma);
633 break;
634 case 2:
635 hwdesc->addr_buffer3 = cpu_to_le64(buffrag->dma);
636 break;
637 case 3:
638 hwdesc->addr_buffer4 = cpu_to_le64(buffrag->dma);
639 break;
640 }
641 }
642
643 tx_ring->producer = get_next_index(producer, num_txd);
644 smp_mb();
645
646 if (unlikely(qlcnic_tx_pkt(adapter, first_desc, skb)))
647 goto unwind_buff;
648
fe1adc6b 649 if (adapter->drv_mac_learn)
4be41e92 650 qlcnic_send_filter(adapter, first_desc, skb);
c70001a9
SC		 651
652 adapter->stats.txbytes += skb->len;
653 adapter->stats.xmitcalled++;
654
655 qlcnic_update_cmd_producer(tx_ring);
656
657 return NETDEV_TX_OK;
658
659unwind_buff:
660 qlcnic_unmap_buffers(pdev, skb, pbuf);
661drop_packet:
662 adapter->stats.txdropped++;
663 dev_kfree_skb_any(skb);
664 return NETDEV_TX_OK;
665}
666
7f966452 667void qlcnic_advert_link_change(struct qlcnic_adapter *adapter, int linkup)
c70001a9
SC		 668{
669 struct net_device *netdev = adapter->netdev;
670
671 if (adapter->ahw->linkup && !linkup) {
672 netdev_info(netdev, "NIC Link is down\n");
673 adapter->ahw->linkup = 0;
674 if (netif_running(netdev)) {
675 netif_carrier_off(netdev);
676 netif_stop_queue(netdev);
677 }
678 } else if (!adapter->ahw->linkup && linkup) {
679 netdev_info(netdev, "NIC Link is up\n");
680 adapter->ahw->linkup = 1;
681 if (netif_running(netdev)) {
682 netif_carrier_on(netdev);
683 netif_wake_queue(netdev);
684 }
685 }
686}
687
d17dd0d9
SC		 688static int qlcnic_alloc_rx_skb(struct qlcnic_adapter *adapter,
689 struct qlcnic_host_rds_ring *rds_ring,
690 struct qlcnic_rx_buffer *buffer)
c70001a9
SC		 691{
692 struct sk_buff *skb;
693 dma_addr_t dma;
694 struct pci_dev *pdev = adapter->pdev;
695
696 skb = netdev_alloc_skb(adapter->netdev, rds_ring->skb_size);
697 if (!skb) {
698 adapter->stats.skb_alloc_failure++;
699 return -ENOMEM;
700 }
701
702 skb_reserve(skb, NET_IP_ALIGN);
4be41e92
SC		 703 dma = pci_map_single(pdev, skb->data,
704 rds_ring->dma_size, PCI_DMA_FROMDEVICE);
c70001a9
SC		 705
706 if (pci_dma_mapping_error(pdev, dma)) {
707 adapter->stats.rx_dma_map_error++;
708 dev_kfree_skb_any(skb);
709 return -ENOMEM;
710 }
711
712 buffer->skb = skb;
713 buffer->dma = dma;
714
715 return 0;
716}
717
718static void qlcnic_post_rx_buffers_nodb(struct qlcnic_adapter *adapter,
4be41e92
SC		 719 struct qlcnic_host_rds_ring *rds_ring,
720 u8 ring_id)
c70001a9
SC		 721{
722 struct rcv_desc *pdesc;
723 struct qlcnic_rx_buffer *buffer;
724 int count = 0;
4be41e92 725 uint32_t producer, handle;
c70001a9
SC		 726 struct list_head *head;
727
728 if (!spin_trylock(&rds_ring->lock))
729 return;
730
731 producer = rds_ring->producer;
c70001a9 732 head = &rds_ring->free_list;
d17dd0d9 733 while (!list_empty(head)) {
c70001a9
SC		 734 buffer = list_entry(head->next, struct qlcnic_rx_buffer, list);
735
736 if (!buffer->skb) {
737 if (qlcnic_alloc_rx_skb(adapter, rds_ring, buffer))
738 break;
739 }
c70001a9
SC		 740 count++;
741 list_del(&buffer->list);
742
743 /* make a rcv descriptor */
744 pdesc = &rds_ring->desc_head[producer];
4be41e92
SC		 745 handle = qlcnic_get_ref_handle(adapter,
746 buffer->ref_handle, ring_id);
747 pdesc->reference_handle = cpu_to_le16(handle);
c70001a9
SC		 748 pdesc->buffer_length = cpu_to_le32(rds_ring->dma_size);
749 pdesc->addr_buffer = cpu_to_le64(buffer->dma);
c70001a9
SC		 750 producer = get_next_index(producer, rds_ring->num_desc);
751 }
c70001a9
SC		 752 if (count) {
753 rds_ring->producer = producer;
754 writel((producer - 1) & (rds_ring->num_desc - 1),
d17dd0d9 755 rds_ring->crb_rcv_producer);
c70001a9
SC		 756 }
757 spin_unlock(&rds_ring->lock);
758}
759
4be41e92
SC		 760static int qlcnic_process_cmd_ring(struct qlcnic_adapter *adapter,
761 struct qlcnic_host_tx_ring *tx_ring,
762 int budget)
c70001a9
SC		 763{
764 u32 sw_consumer, hw_consumer;
d17dd0d9 765 int i, done, count = 0;
c70001a9
SC		 766 struct qlcnic_cmd_buffer *buffer;
767 struct pci_dev *pdev = adapter->pdev;
768 struct net_device *netdev = adapter->netdev;
769 struct qlcnic_skb_frag *frag;
c70001a9
SC		 770
771 if (!spin_trylock(&adapter->tx_clean_lock))
772 return 1;
773
774 sw_consumer = tx_ring->sw_consumer;
775 hw_consumer = le32_to_cpu(*(tx_ring->hw_consumer));
776
777 while (sw_consumer != hw_consumer) {
778 buffer = &tx_ring->cmd_buf_arr[sw_consumer];
779 if (buffer->skb) {
780 frag = &buffer->frag_array[0];
781 pci_unmap_single(pdev, frag->dma, frag->length,
782 PCI_DMA_TODEVICE);
783 frag->dma = 0ULL;
784 for (i = 1; i < buffer->frag_count; i++) {
785 frag++;
786 pci_unmap_page(pdev, frag->dma, frag->length,
787 PCI_DMA_TODEVICE);
788 frag->dma = 0ULL;
789 }
c70001a9
SC		 790 adapter->stats.xmitfinished++;
791 dev_kfree_skb_any(buffer->skb);
792 buffer->skb = NULL;
793 }
794
795 sw_consumer = get_next_index(sw_consumer, tx_ring->num_desc);
4be41e92 796 if (++count >= budget)
c70001a9
SC		 797 break;
798 }
799
800 if (count && netif_running(netdev)) {
801 tx_ring->sw_consumer = sw_consumer;
c70001a9 802 smp_mb();
c70001a9
SC		 803 if (netif_queue_stopped(netdev) && netif_carrier_ok(netdev)) {
804 if (qlcnic_tx_avail(tx_ring) > TX_STOP_THRESH) {
805 netif_wake_queue(netdev);
806 adapter->stats.xmit_on++;
807 }
808 }
809 adapter->tx_timeo_cnt = 0;
810 }
811 /*
812 * If everything is freed up to consumer then check if the ring is full
813 * If the ring is full then check if more needs to be freed and
814 * schedule the call back again.
815 *
816 * This happens when there are 2 CPUs. One could be freeing and the
817 * other filling it. If the ring is full when we get out of here and
818 * the card has already interrupted the host then the host can miss the
819 * interrupt.
820 *
821 * There is still a possible race condition and the host could miss an
822 * interrupt. The card has to take care of this.
823 */
824 hw_consumer = le32_to_cpu(*(tx_ring->hw_consumer));
825 done = (sw_consumer == hw_consumer);
826 spin_unlock(&adapter->tx_clean_lock);
827
828 return done;
829}
830
831static int qlcnic_poll(struct napi_struct *napi, int budget)
832{
4be41e92 833 int tx_complete, work_done;
d17dd0d9
SC		 834 struct qlcnic_host_sds_ring *sds_ring;
835 struct qlcnic_adapter *adapter;
c70001a9 836
d17dd0d9
SC		 837 sds_ring = container_of(napi, struct qlcnic_host_sds_ring, napi);
838 adapter = sds_ring->adapter;
4be41e92
SC		 839 tx_complete = qlcnic_process_cmd_ring(adapter, adapter->tx_ring,
840 budget);
c70001a9 841 work_done = qlcnic_process_rcv_ring(sds_ring, budget);
c70001a9
SC		 842 if ((work_done < budget) && tx_complete) {
843 napi_complete(&sds_ring->napi);
844 if (test_bit(__QLCNIC_DEV_UP, &adapter->state))
845 qlcnic_enable_int(sds_ring);
846 }
847
848 return work_done;
849}
850
851static int qlcnic_rx_poll(struct napi_struct *napi, int budget)
852{
d17dd0d9
SC		 853 struct qlcnic_host_sds_ring *sds_ring;
854 struct qlcnic_adapter *adapter;
c70001a9
SC		 855 int work_done;
856
d17dd0d9
SC		 857 sds_ring = container_of(napi, struct qlcnic_host_sds_ring, napi);
858 adapter = sds_ring->adapter;
859
c70001a9
SC		 860 work_done = qlcnic_process_rcv_ring(sds_ring, budget);
861
862 if (work_done < budget) {
863 napi_complete(&sds_ring->napi);
864 if (test_bit(__QLCNIC_DEV_UP, &adapter->state))
865 qlcnic_enable_int(sds_ring);
866 }
867
868 return work_done;
869}
870
d17dd0d9
SC		 871static void qlcnic_handle_linkevent(struct qlcnic_adapter *adapter,
872 struct qlcnic_fw_msg *msg)
c70001a9
SC		 873{
874 u32 cable_OUI;
d17dd0d9
SC		 875 u16 cable_len, link_speed;
876 u8 link_status, module, duplex, autoneg, lb_status = 0;
c70001a9
SC		 877 struct net_device *netdev = adapter->netdev;
878
79788450 879 adapter->ahw->has_link_events = 1;
c70001a9
SC		 880
881 cable_OUI = msg->body[1] & 0xffffffff;
882 cable_len = (msg->body[1] >> 32) & 0xffff;
883 link_speed = (msg->body[1] >> 48) & 0xffff;
884
885 link_status = msg->body[2] & 0xff;
886 duplex = (msg->body[2] >> 16) & 0xff;
887 autoneg = (msg->body[2] >> 24) & 0xff;
888 lb_status = (msg->body[2] >> 32) & 0x3;
889
890 module = (msg->body[2] >> 8) & 0xff;
891 if (module == LINKEVENT_MODULE_TWINAX_UNSUPPORTED_CABLE)
d17dd0d9
SC		 892 dev_info(&netdev->dev,
893 "unsupported cable: OUI 0x%x, length %d\n",
894 cable_OUI, cable_len);
c70001a9
SC		 895 else if (module == LINKEVENT_MODULE_TWINAX_UNSUPPORTED_CABLELEN)
896 dev_info(&netdev->dev, "unsupported cable length %d\n",
d17dd0d9 897 cable_len);
c70001a9
SC		 898
899 if (!link_status && (lb_status == QLCNIC_ILB_MODE ||
900 lb_status == QLCNIC_ELB_MODE))
901 adapter->ahw->loopback_state |= QLCNIC_LINKEVENT;
902
903 qlcnic_advert_link_change(adapter, link_status);
904
905 if (duplex == LINKEVENT_FULL_DUPLEX)
79788450 906 adapter->ahw->link_duplex = DUPLEX_FULL;
c70001a9 907 else
79788450 908 adapter->ahw->link_duplex = DUPLEX_HALF;
c70001a9 909
79788450
SC		 910 adapter->ahw->module_type = module;
911 adapter->ahw->link_autoneg = autoneg;
c70001a9
SC		 912
913 if (link_status) {
79788450 914 adapter->ahw->link_speed = link_speed;
c70001a9 915 } else {
79788450
SC		 916 adapter->ahw->link_speed = SPEED_UNKNOWN;
917 adapter->ahw->link_duplex = DUPLEX_UNKNOWN;
c70001a9
SC		 918 }
919}
920
d17dd0d9
SC		 921static void qlcnic_handle_fw_message(int desc_cnt, int index,
922 struct qlcnic_host_sds_ring *sds_ring)
c70001a9
SC		 923{
924 struct qlcnic_fw_msg msg;
925 struct status_desc *desc;
926 struct qlcnic_adapter *adapter;
927 struct device *dev;
928 int i = 0, opcode, ret;
929
930 while (desc_cnt > 0 && i < 8) {
931 desc = &sds_ring->desc_head[index];
932 msg.words[i++] = le64_to_cpu(desc->status_desc_data[0]);
933 msg.words[i++] = le64_to_cpu(desc->status_desc_data[1]);
934
935 index = get_next_index(index, sds_ring->num_desc);
936 desc_cnt--;
937 }
938
939 adapter = sds_ring->adapter;
940 dev = &adapter->pdev->dev;
941 opcode = qlcnic_get_nic_msg_opcode(msg.body[0]);
942
943 switch (opcode) {
944 case QLCNIC_C2H_OPCODE_GET_LINKEVENT_RESPONSE:
945 qlcnic_handle_linkevent(adapter, &msg);
946 break;
947 case QLCNIC_C2H_OPCODE_CONFIG_LOOPBACK:
948 ret = (u32)(msg.body[1]);
949 switch (ret) {
950 case 0:
951 adapter->ahw->loopback_state |= QLCNIC_LB_RESPONSE;
952 break;
953 case 1:
954 dev_info(dev, "loopback already in progress\n");
79788450 955 adapter->ahw->diag_cnt = -QLCNIC_TEST_IN_PROGRESS;
c70001a9
SC		 956 break;
957 case 2:
958 dev_info(dev, "loopback cable is not connected\n");
79788450 959 adapter->ahw->diag_cnt = -QLCNIC_LB_CABLE_NOT_CONN;
c70001a9
SC		 960 break;
961 default:
d17dd0d9
SC		 962 dev_info(dev,
963 "loopback configure request failed, err %x\n",
964 ret);
79788450 965 adapter->ahw->diag_cnt = -QLCNIC_UNDEFINED_ERROR;
c70001a9
SC		 966 break;
967 }
968 break;
969 default:
970 break;
971 }
972}
973
4be41e92
SC		 974struct sk_buff *qlcnic_process_rxbuf(struct qlcnic_adapter *adapter,
975 struct qlcnic_host_rds_ring *ring,
976 u16 index, u16 cksum)
c70001a9
SC		 977{
978 struct qlcnic_rx_buffer *buffer;
979 struct sk_buff *skb;
980
4be41e92 981 buffer = &ring->rx_buf_arr[index];
c70001a9
SC		 982 if (unlikely(buffer->skb == NULL)) {
983 WARN_ON(1);
984 return NULL;
985 }
986
4be41e92 987 pci_unmap_single(adapter->pdev, buffer->dma, ring->dma_size,
d17dd0d9 988 PCI_DMA_FROMDEVICE);
c70001a9
SC		 989
990 skb = buffer->skb;
c70001a9 991 if (likely((adapter->netdev->features & NETIF_F_RXCSUM) &&
d17dd0d9 992 (cksum == STATUS_CKSUM_OK || cksum == STATUS_CKSUM_LOOP))) {
c70001a9
SC		 993 adapter->stats.csummed++;
994 skb->ip_summed = CHECKSUM_UNNECESSARY;
995 } else {
996 skb_checksum_none_assert(skb);
997 }
998
4be41e92 999
c70001a9
SC		 1000 buffer->skb = NULL;
1001
1002 return skb;
1003}
1004
d17dd0d9
SC		 1005static inline int qlcnic_check_rx_tagging(struct qlcnic_adapter *adapter,
1006 struct sk_buff *skb, u16 *vlan_tag)
c70001a9
SC		 1007{
1008 struct ethhdr *eth_hdr;
1009
1010 if (!__vlan_get_tag(skb, vlan_tag)) {
d17dd0d9 1011 eth_hdr = (struct ethhdr *)skb->data;
c70001a9
SC		 1012 memmove(skb->data + VLAN_HLEN, eth_hdr, ETH_ALEN * 2);
1013 skb_pull(skb, VLAN_HLEN);
1014 }
91b7282b 1015 if (!adapter->rx_pvid)
c70001a9
SC		 1016 return 0;
1017
91b7282b 1018 if (*vlan_tag == adapter->rx_pvid) {
c70001a9
SC		 1019 /* Outer vlan tag. Packet should follow non-vlan path */
1020 *vlan_tag = 0xffff;
1021 return 0;
1022 }
1023 if (adapter->flags & QLCNIC_TAGGING_ENABLED)
1024 return 0;
1025
1026 return -EINVAL;
1027}
1028
1029static struct qlcnic_rx_buffer *
1030qlcnic_process_rcv(struct qlcnic_adapter *adapter,
d17dd0d9
SC		 1031 struct qlcnic_host_sds_ring *sds_ring, int ring,
1032 u64 sts_data0)
c70001a9
SC		 1033{
1034 struct net_device *netdev = adapter->netdev;
1035 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1036 struct qlcnic_rx_buffer *buffer;
1037 struct sk_buff *skb;
1038 struct qlcnic_host_rds_ring *rds_ring;
53643a75
SS		 1039 int index, length, cksum, pkt_offset, is_lb_pkt;
1040 u16 vid = 0xffff, t_vid;
c70001a9
SC		 1041
1042 if (unlikely(ring >= adapter->max_rds_rings))
1043 return NULL;
1044
1045 rds_ring = &recv_ctx->rds_rings[ring];
1046
1047 index = qlcnic_get_sts_refhandle(sts_data0);
1048 if (unlikely(index >= rds_ring->num_desc))
1049 return NULL;
1050
1051 buffer = &rds_ring->rx_buf_arr[index];
c70001a9
SC		 1052 length = qlcnic_get_sts_totallength(sts_data0);
1053 cksum = qlcnic_get_sts_status(sts_data0);
1054 pkt_offset = qlcnic_get_sts_pkt_offset(sts_data0);
1055
1056 skb = qlcnic_process_rxbuf(adapter, rds_ring, index, cksum);
1057 if (!skb)
1058 return buffer;
1059
53643a75
SS		 1060 if (adapter->drv_mac_learn &&
1061 (adapter->flags & QLCNIC_ESWITCH_ENABLED)) {
1062 t_vid = 0;
1063 is_lb_pkt = qlcnic_82xx_is_lb_pkt(sts_data0);
f80bc8fe 1064 qlcnic_add_lb_filter(adapter, skb, is_lb_pkt, t_vid);
53643a75
SS		 1065 }
1066
c70001a9
SC		 1067 if (length > rds_ring->skb_size)
1068 skb_put(skb, rds_ring->skb_size);
1069 else
1070 skb_put(skb, length);
1071
1072 if (pkt_offset)
1073 skb_pull(skb, pkt_offset);
1074
1075 if (unlikely(qlcnic_check_rx_tagging(adapter, skb, &vid))) {
1076 adapter->stats.rxdropped++;
1077 dev_kfree_skb(skb);
1078 return buffer;
1079 }
1080
1081 skb->protocol = eth_type_trans(skb, netdev);
1082
1083 if (vid != 0xffff)
86a9bad3 1084 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid);
c70001a9
SC		 1085
1086 napi_gro_receive(&sds_ring->napi, skb);
1087
1088 adapter->stats.rx_pkts++;
1089 adapter->stats.rxbytes += length;
1090
1091 return buffer;
1092}
1093
1094#define QLC_TCP_HDR_SIZE 20
1095#define QLC_TCP_TS_OPTION_SIZE 12
1096#define QLC_TCP_TS_HDR_SIZE (QLC_TCP_HDR_SIZE + QLC_TCP_TS_OPTION_SIZE)
1097
1098static struct qlcnic_rx_buffer *
1099qlcnic_process_lro(struct qlcnic_adapter *adapter,
d17dd0d9 1100 int ring, u64 sts_data0, u64 sts_data1)
c70001a9
SC		 1101{
1102 struct net_device *netdev = adapter->netdev;
1103 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1104 struct qlcnic_rx_buffer *buffer;
1105 struct sk_buff *skb;
1106 struct qlcnic_host_rds_ring *rds_ring;
1107 struct iphdr *iph;
776e7bde 1108 struct ipv6hdr *ipv6h;
c70001a9
SC		 1109 struct tcphdr *th;
1110 bool push, timestamp;
53643a75
SS		 1111 int index, l2_hdr_offset, l4_hdr_offset, is_lb_pkt;
1112 u16 lro_length, length, data_offset, t_vid, vid = 0xffff;
c70001a9 1113 u32 seq_number;
c70001a9
SC		 1114
1115 if (unlikely(ring > adapter->max_rds_rings))
1116 return NULL;
1117
1118 rds_ring = &recv_ctx->rds_rings[ring];
1119
1120 index = qlcnic_get_lro_sts_refhandle(sts_data0);
1121 if (unlikely(index > rds_ring->num_desc))
1122 return NULL;
1123
1124 buffer = &rds_ring->rx_buf_arr[index];
1125
1126 timestamp = qlcnic_get_lro_sts_timestamp(sts_data0);
1127 lro_length = qlcnic_get_lro_sts_length(sts_data0);
1128 l2_hdr_offset = qlcnic_get_lro_sts_l2_hdr_offset(sts_data0);
1129 l4_hdr_offset = qlcnic_get_lro_sts_l4_hdr_offset(sts_data0);
1130 push = qlcnic_get_lro_sts_push_flag(sts_data0);
1131 seq_number = qlcnic_get_lro_sts_seq_number(sts_data1);
1132
1133 skb = qlcnic_process_rxbuf(adapter, rds_ring, index, STATUS_CKSUM_OK);
1134 if (!skb)
1135 return buffer;
1136
53643a75
SS		 1137 if (adapter->drv_mac_learn &&
1138 (adapter->flags & QLCNIC_ESWITCH_ENABLED)) {
1139 t_vid = 0;
1140 is_lb_pkt = qlcnic_82xx_is_lb_pkt(sts_data0);
f80bc8fe 1141 qlcnic_add_lb_filter(adapter, skb, is_lb_pkt, t_vid);
53643a75
SS		 1142 }
1143
c70001a9
SC		 1144 if (timestamp)
1145 data_offset = l4_hdr_offset + QLC_TCP_TS_HDR_SIZE;
1146 else
1147 data_offset = l4_hdr_offset + QLC_TCP_HDR_SIZE;
1148
1149 skb_put(skb, lro_length + data_offset);
c70001a9
SC		 1150 skb_pull(skb, l2_hdr_offset);
1151
1152 if (unlikely(qlcnic_check_rx_tagging(adapter, skb, &vid))) {
1153 adapter->stats.rxdropped++;
1154 dev_kfree_skb(skb);
1155 return buffer;
1156 }
1157
1158 skb->protocol = eth_type_trans(skb, netdev);
776e7bde 1159
069048f1 1160 if (ntohs(skb->protocol) == ETH_P_IPV6) {
776e7bde
SS		 1161 ipv6h = (struct ipv6hdr *)skb->data;
1162 th = (struct tcphdr *)(skb->data + sizeof(struct ipv6hdr));
1163 length = (th->doff << 2) + lro_length;
1164 ipv6h->payload_len = htons(length);
1165 } else {
1166 iph = (struct iphdr *)skb->data;
1167 th = (struct tcphdr *)(skb->data + (iph->ihl << 2));
1168 length = (iph->ihl << 2) + (th->doff << 2) + lro_length;
1bcac3b0 1169 csum_replace2(&iph->check, iph->tot_len, htons(length));
776e7bde 1170 iph->tot_len = htons(length);
776e7bde
SS		 1171 }
1172
c70001a9
SC		 1173 th->psh = push;
1174 th->seq = htonl(seq_number);
c70001a9
SC		 1175 length = skb->len;
1176
bd69ba79 1177 if (adapter->flags & QLCNIC_FW_LRO_MSS_CAP) {
c70001a9 1178 skb_shinfo(skb)->gso_size = qlcnic_get_lro_sts_mss(sts_data1);
bd69ba79
MT		 1179 if (skb->protocol == htons(ETH_P_IPV6))
1180 skb_shinfo(skb)->gso_type = SKB_GSO_TCPV6;
1181 else
1182 skb_shinfo(skb)->gso_type = SKB_GSO_TCPV4;
1183 }
c70001a9
SC		 1184
1185 if (vid != 0xffff)
86a9bad3 1186 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid);
c70001a9
SC		 1187 netif_receive_skb(skb);
1188
1189 adapter->stats.lro_pkts++;
1190 adapter->stats.lrobytes += length;
1191
1192 return buffer;
1193}
1194
d17dd0d9 1195int qlcnic_process_rcv_ring(struct qlcnic_host_sds_ring *sds_ring, int max)
c70001a9 1196{
d17dd0d9 1197 struct qlcnic_host_rds_ring *rds_ring;
c70001a9
SC		 1198 struct qlcnic_adapter *adapter = sds_ring->adapter;
1199 struct list_head *cur;
1200 struct status_desc *desc;
1201 struct qlcnic_rx_buffer *rxbuf;
4be41e92 1202 int opcode, desc_cnt, count = 0;
c70001a9 1203 u64 sts_data0, sts_data1;
4be41e92 1204 u8 ring;
c70001a9
SC		 1205 u32 consumer = sds_ring->consumer;
1206
1207 while (count < max) {
1208 desc = &sds_ring->desc_head[consumer];
1209 sts_data0 = le64_to_cpu(desc->status_desc_data[0]);
1210
1211 if (!(sts_data0 & STATUS_OWNER_HOST))
1212 break;
1213
1214 desc_cnt = qlcnic_get_sts_desc_cnt(sts_data0);
1215 opcode = qlcnic_get_sts_opcode(sts_data0);
c70001a9
SC		 1216 switch (opcode) {
1217 case QLCNIC_RXPKT_DESC:
1218 case QLCNIC_OLD_RXPKT_DESC:
1219 case QLCNIC_SYN_OFFLOAD:
1220 ring = qlcnic_get_sts_type(sts_data0);
d17dd0d9
SC		 1221 rxbuf = qlcnic_process_rcv(adapter, sds_ring, ring,
1222 sts_data0);
c70001a9
SC		 1223 break;
1224 case QLCNIC_LRO_DESC:
1225 ring = qlcnic_get_lro_sts_type(sts_data0);
1226 sts_data1 = le64_to_cpu(desc->status_desc_data[1]);
1227 rxbuf = qlcnic_process_lro(adapter, ring, sts_data0,
1228 sts_data1);
1229 break;
1230 case QLCNIC_RESPONSE_DESC:
1231 qlcnic_handle_fw_message(desc_cnt, consumer, sds_ring);
1232 default:
1233 goto skip;
1234 }
c70001a9
SC		 1235 WARN_ON(desc_cnt > 1);
1236
1237 if (likely(rxbuf))
1238 list_add_tail(&rxbuf->list, &sds_ring->free_list[ring]);
1239 else
1240 adapter->stats.null_rxbuf++;
c70001a9
SC		 1241skip:
1242 for (; desc_cnt > 0; desc_cnt--) {
1243 desc = &sds_ring->desc_head[consumer];
4be41e92 1244 desc->status_desc_data[0] = QLCNIC_DESC_OWNER_FW;
c70001a9
SC		 1245 consumer = get_next_index(consumer, sds_ring->num_desc);
1246 }
1247 count++;
1248 }
1249
1250 for (ring = 0; ring < adapter->max_rds_rings; ring++) {
d17dd0d9 1251 rds_ring = &adapter->recv_ctx->rds_rings[ring];
c70001a9
SC		 1252 if (!list_empty(&sds_ring->free_list[ring])) {
1253 list_for_each(cur, &sds_ring->free_list[ring]) {
d17dd0d9
SC		 1254 rxbuf = list_entry(cur, struct qlcnic_rx_buffer,
1255 list);
c70001a9
SC		 1256 qlcnic_alloc_rx_skb(adapter, rds_ring, rxbuf);
1257 }
1258 spin_lock(&rds_ring->lock);
1259 list_splice_tail_init(&sds_ring->free_list[ring],
d17dd0d9 1260 &rds_ring->free_list);
c70001a9
SC		 1261 spin_unlock(&rds_ring->lock);
1262 }
1263
4be41e92 1264 qlcnic_post_rx_buffers_nodb(adapter, rds_ring, ring);
c70001a9
SC		 1265 }
1266
1267 if (count) {
1268 sds_ring->consumer = consumer;
1269 writel(consumer, sds_ring->crb_sts_consumer);
1270 }
1271
1272 return count;
1273}
1274
d17dd0d9 1275void qlcnic_post_rx_buffers(struct qlcnic_adapter *adapter,
4be41e92 1276 struct qlcnic_host_rds_ring *rds_ring, u8 ring_id)
c70001a9
SC		 1277{
1278 struct rcv_desc *pdesc;
1279 struct qlcnic_rx_buffer *buffer;
1280 int count = 0;
4be41e92 1281 u32 producer, handle;
c70001a9
SC		 1282 struct list_head *head;
1283
1284 producer = rds_ring->producer;
c70001a9 1285 head = &rds_ring->free_list;
d17dd0d9 1286
c70001a9
SC		 1287 while (!list_empty(head)) {
1288
1289 buffer = list_entry(head->next, struct qlcnic_rx_buffer, list);
1290
1291 if (!buffer->skb) {
1292 if (qlcnic_alloc_rx_skb(adapter, rds_ring, buffer))
1293 break;
1294 }
1295
1296 count++;
1297 list_del(&buffer->list);
1298
1299 /* make a rcv descriptor */
1300 pdesc = &rds_ring->desc_head[producer];
1301 pdesc->addr_buffer = cpu_to_le64(buffer->dma);
4be41e92
SC		 1302 handle = qlcnic_get_ref_handle(adapter, buffer->ref_handle,
1303 ring_id);
1304 pdesc->reference_handle = cpu_to_le16(handle);
c70001a9 1305 pdesc->buffer_length = cpu_to_le32(rds_ring->dma_size);
c70001a9
SC		 1306 producer = get_next_index(producer, rds_ring->num_desc);
1307 }
1308
1309 if (count) {
1310 rds_ring->producer = producer;
1311 writel((producer-1) & (rds_ring->num_desc-1),
d17dd0d9 1312 rds_ring->crb_rcv_producer);
c70001a9
SC		 1313 }
1314}
1315
1316static void dump_skb(struct sk_buff *skb, struct qlcnic_adapter *adapter)
1317{
1318 int i;
1319 unsigned char *data = skb->data;
1320
d17dd0d9 1321 pr_info(KERN_INFO "\n");
c70001a9
SC		 1322 for (i = 0; i < skb->len; i++) {
1323 QLCDB(adapter, DRV, "%02x ", data[i]);
1324 if ((i & 0x0f) == 8)
d17dd0d9 1325 pr_info(KERN_INFO "\n");
c70001a9
SC		 1326 }
1327}
1328
1329static void qlcnic_process_rcv_diag(struct qlcnic_adapter *adapter, int ring,
1330 u64 sts_data0)
1331{
1332 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1333 struct sk_buff *skb;
1334 struct qlcnic_host_rds_ring *rds_ring;
1335 int index, length, cksum, pkt_offset;
1336
1337 if (unlikely(ring >= adapter->max_rds_rings))
1338 return;
1339
1340 rds_ring = &recv_ctx->rds_rings[ring];
1341
1342 index = qlcnic_get_sts_refhandle(sts_data0);
1343 length = qlcnic_get_sts_totallength(sts_data0);
1344 if (unlikely(index >= rds_ring->num_desc))
1345 return;
1346
1347 cksum = qlcnic_get_sts_status(sts_data0);
1348 pkt_offset = qlcnic_get_sts_pkt_offset(sts_data0);
1349
1350 skb = qlcnic_process_rxbuf(adapter, rds_ring, index, cksum);
1351 if (!skb)
1352 return;
1353
1354 if (length > rds_ring->skb_size)
1355 skb_put(skb, rds_ring->skb_size);
1356 else
1357 skb_put(skb, length);
1358
1359 if (pkt_offset)
1360 skb_pull(skb, pkt_offset);
1361
1362 if (!qlcnic_check_loopback_buff(skb->data, adapter->mac_addr))
79788450 1363 adapter->ahw->diag_cnt++;
c70001a9
SC		 1364 else
1365 dump_skb(skb, adapter);
1366
1367 dev_kfree_skb_any(skb);
1368 adapter->stats.rx_pkts++;
1369 adapter->stats.rxbytes += length;
1370
1371 return;
1372}
1373
7e2cf4fe 1374void qlcnic_82xx_process_rcv_ring_diag(struct qlcnic_host_sds_ring *sds_ring)
c70001a9
SC		 1375{
1376 struct qlcnic_adapter *adapter = sds_ring->adapter;
1377 struct status_desc *desc;
1378 u64 sts_data0;
1379 int ring, opcode, desc_cnt;
1380
1381 u32 consumer = sds_ring->consumer;
1382
1383 desc = &sds_ring->desc_head[consumer];
1384 sts_data0 = le64_to_cpu(desc->status_desc_data[0]);
1385
1386 if (!(sts_data0 & STATUS_OWNER_HOST))
1387 return;
1388
1389 desc_cnt = qlcnic_get_sts_desc_cnt(sts_data0);
1390 opcode = qlcnic_get_sts_opcode(sts_data0);
1391 switch (opcode) {
1392 case QLCNIC_RESPONSE_DESC:
1393 qlcnic_handle_fw_message(desc_cnt, consumer, sds_ring);
1394 break;
1395 default:
1396 ring = qlcnic_get_sts_type(sts_data0);
1397 qlcnic_process_rcv_diag(adapter, ring, sts_data0);
1398 break;
1399 }
1400
1401 for (; desc_cnt > 0; desc_cnt--) {
1402 desc = &sds_ring->desc_head[consumer];
1403 desc->status_desc_data[0] = cpu_to_le64(STATUS_OWNER_PHANTOM);
1404 consumer = get_next_index(consumer, sds_ring->num_desc);
1405 }
1406
1407 sds_ring->consumer = consumer;
1408 writel(consumer, sds_ring->crb_sts_consumer);
1409}
1410
7e2cf4fe
SC		 1411int qlcnic_82xx_napi_add(struct qlcnic_adapter *adapter,
1412 struct net_device *netdev)
c70001a9 1413{
d17dd0d9 1414 int ring, max_sds_rings;
c70001a9
SC		 1415 struct qlcnic_host_sds_ring *sds_ring;
1416 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1417
1418 if (qlcnic_alloc_sds_rings(recv_ctx, adapter->max_sds_rings))
1419 return -ENOMEM;
1420
d17dd0d9
SC		 1421 max_sds_rings = adapter->max_sds_rings;
1422
c70001a9
SC		 1423 for (ring = 0; ring < adapter->max_sds_rings; ring++) {
1424 sds_ring = &recv_ctx->sds_rings[ring];
4be41e92 1425 if (ring == adapter->max_sds_rings - 1)
c70001a9 1426 netif_napi_add(netdev, &sds_ring->napi, qlcnic_poll,
d17dd0d9 1427 QLCNIC_NETDEV_WEIGHT / max_sds_rings);
c70001a9 1428 else
d17dd0d9
SC		 1429 netif_napi_add(netdev, &sds_ring->napi, qlcnic_rx_poll,
1430 QLCNIC_NETDEV_WEIGHT*2);
c70001a9
SC		 1431 }
1432
4be41e92
SC		 1433 if (qlcnic_alloc_tx_rings(adapter, netdev)) {
1434 qlcnic_free_sds_rings(recv_ctx);
1435 return -ENOMEM;
1436 }
1437
c70001a9
SC		 1438 return 0;
1439}
1440
4be41e92 1441void qlcnic_82xx_napi_del(struct qlcnic_adapter *adapter)
c70001a9
SC		 1442{
1443 int ring;
1444 struct qlcnic_host_sds_ring *sds_ring;
1445 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1446
1447 for (ring = 0; ring < adapter->max_sds_rings; ring++) {
1448 sds_ring = &recv_ctx->sds_rings[ring];
1449 netif_napi_del(&sds_ring->napi);
1450 }
1451
1452 qlcnic_free_sds_rings(adapter->recv_ctx);
4be41e92 1453 qlcnic_free_tx_rings(adapter);
c70001a9
SC		 1454}
1455
7e2cf4fe 1456void qlcnic_82xx_napi_enable(struct qlcnic_adapter *adapter)
c70001a9
SC		 1457{
1458 int ring;
1459 struct qlcnic_host_sds_ring *sds_ring;
1460 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1461
1462 if (adapter->is_up != QLCNIC_ADAPTER_UP_MAGIC)
1463 return;
1464
1465 for (ring = 0; ring < adapter->max_sds_rings; ring++) {
1466 sds_ring = &recv_ctx->sds_rings[ring];
1467 napi_enable(&sds_ring->napi);
1468 qlcnic_enable_int(sds_ring);
1469 }
1470}
1471
7e2cf4fe 1472void qlcnic_82xx_napi_disable(struct qlcnic_adapter *adapter)
c70001a9
SC		 1473{
1474 int ring;
1475 struct qlcnic_host_sds_ring *sds_ring;
1476 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1477
1478 if (adapter->is_up != QLCNIC_ADAPTER_UP_MAGIC)
1479 return;
1480
1481 for (ring = 0; ring < adapter->max_sds_rings; ring++) {
1482 sds_ring = &recv_ctx->sds_rings[ring];
1483 qlcnic_disable_int(sds_ring);
1484 napi_synchronize(&sds_ring->napi);
1485 napi_disable(&sds_ring->napi);
1486 }
1487}
4be41e92 1488
53643a75
SS		 1489#define QLC_83XX_NORMAL_LB_PKT (1ULL << 36)
1490#define QLC_83XX_LRO_LB_PKT (1ULL << 46)
1491
1492static inline int qlcnic_83xx_is_lb_pkt(u64 sts_data, int lro_pkt)
1493{
1494 if (lro_pkt)
1495 return (sts_data & QLC_83XX_LRO_LB_PKT) ? 1 : 0;
1496 else
1497 return (sts_data & QLC_83XX_NORMAL_LB_PKT) ? 1 : 0;
1498}
1499
4be41e92
SC		 1500static struct qlcnic_rx_buffer *
1501qlcnic_83xx_process_rcv(struct qlcnic_adapter *adapter,
1502 struct qlcnic_host_sds_ring *sds_ring,
1503 u8 ring, u64 sts_data[])
1504{
1505 struct net_device *netdev = adapter->netdev;
1506 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1507 struct qlcnic_rx_buffer *buffer;
1508 struct sk_buff *skb;
1509 struct qlcnic_host_rds_ring *rds_ring;
53643a75
SS		 1510 int index, length, cksum, is_lb_pkt;
1511 u16 vid = 0xffff, t_vid;
4be41e92
SC		 1512
1513 if (unlikely(ring >= adapter->max_rds_rings))
1514 return NULL;
1515
1516 rds_ring = &recv_ctx->rds_rings[ring];
1517
1518 index = qlcnic_83xx_hndl(sts_data[0]);
1519 if (unlikely(index >= rds_ring->num_desc))
1520 return NULL;
1521
1522 buffer = &rds_ring->rx_buf_arr[index];
1523 length = qlcnic_83xx_pktln(sts_data[0]);
1524 cksum = qlcnic_83xx_csum_status(sts_data[1]);
1525 skb = qlcnic_process_rxbuf(adapter, rds_ring, index, cksum);
1526 if (!skb)
1527 return buffer;
1528
53643a75
SS		 1529 if (adapter->drv_mac_learn &&
1530 (adapter->flags & QLCNIC_ESWITCH_ENABLED)) {
1531 t_vid = 0;
1532 is_lb_pkt = qlcnic_83xx_is_lb_pkt(sts_data[1], 0);
f80bc8fe 1533 qlcnic_add_lb_filter(adapter, skb, is_lb_pkt, t_vid);
53643a75
SS		 1534 }
1535
4be41e92
SC		 1536 if (length > rds_ring->skb_size)
1537 skb_put(skb, rds_ring->skb_size);
1538 else
1539 skb_put(skb, length);
1540
1541 if (unlikely(qlcnic_check_rx_tagging(adapter, skb, &vid))) {
1542 adapter->stats.rxdropped++;
1543 dev_kfree_skb(skb);
1544 return buffer;
1545 }
1546
1547 skb->protocol = eth_type_trans(skb, netdev);
1548
1549 if (vid != 0xffff)
86a9bad3 1550 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid);
4be41e92
SC		 1551
1552 napi_gro_receive(&sds_ring->napi, skb);
1553
1554 adapter->stats.rx_pkts++;
1555 adapter->stats.rxbytes += length;
1556
1557 return buffer;
1558}
1559
1560static struct qlcnic_rx_buffer *
1561qlcnic_83xx_process_lro(struct qlcnic_adapter *adapter,
1562 u8 ring, u64 sts_data[])
1563{
1564 struct net_device *netdev = adapter->netdev;
1565 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1566 struct qlcnic_rx_buffer *buffer;
1567 struct sk_buff *skb;
1568 struct qlcnic_host_rds_ring *rds_ring;
1569 struct iphdr *iph;
1570 struct ipv6hdr *ipv6h;
1571 struct tcphdr *th;
1572 bool push;
1573 int l2_hdr_offset, l4_hdr_offset;
53643a75 1574 int index, is_lb_pkt;
99e85879 1575 u16 lro_length, length, data_offset, gso_size;
53643a75 1576 u16 vid = 0xffff, t_vid;
4be41e92
SC		 1577
1578 if (unlikely(ring > adapter->max_rds_rings))
1579 return NULL;
1580
1581 rds_ring = &recv_ctx->rds_rings[ring];
1582
1583 index = qlcnic_83xx_hndl(sts_data[0]);
1584 if (unlikely(index > rds_ring->num_desc))
1585 return NULL;
1586
1587 buffer = &rds_ring->rx_buf_arr[index];
1588
1589 lro_length = qlcnic_83xx_lro_pktln(sts_data[0]);
1590 l2_hdr_offset = qlcnic_83xx_l2_hdr_off(sts_data[1]);
1591 l4_hdr_offset = qlcnic_83xx_l4_hdr_off(sts_data[1]);
1592 push = qlcnic_83xx_is_psh_bit(sts_data[1]);
1593
1594 skb = qlcnic_process_rxbuf(adapter, rds_ring, index, STATUS_CKSUM_OK);
1595 if (!skb)
1596 return buffer;
53643a75
SS		 1597
1598 if (adapter->drv_mac_learn &&
1599 (adapter->flags & QLCNIC_ESWITCH_ENABLED)) {
1600 t_vid = 0;
1601 is_lb_pkt = qlcnic_83xx_is_lb_pkt(sts_data[1], 1);
f80bc8fe 1602 qlcnic_add_lb_filter(adapter, skb, is_lb_pkt, t_vid);
53643a75 1603 }
4be41e92
SC		 1604 if (qlcnic_83xx_is_tstamp(sts_data[1]))
1605 data_offset = l4_hdr_offset + QLCNIC_TCP_TS_HDR_SIZE;
1606 else
1607 data_offset = l4_hdr_offset + QLCNIC_TCP_HDR_SIZE;
1608
1609 skb_put(skb, lro_length + data_offset);
1610 skb_pull(skb, l2_hdr_offset);
1611
1612 if (unlikely(qlcnic_check_rx_tagging(adapter, skb, &vid))) {
1613 adapter->stats.rxdropped++;
1614 dev_kfree_skb(skb);
1615 return buffer;
1616 }
1617
1618 skb->protocol = eth_type_trans(skb, netdev);
1619 if (ntohs(skb->protocol) == ETH_P_IPV6) {
1620 ipv6h = (struct ipv6hdr *)skb->data;
1621 th = (struct tcphdr *)(skb->data + sizeof(struct ipv6hdr));
1622
1623 length = (th->doff << 2) + lro_length;
1624 ipv6h->payload_len = htons(length);
1625 } else {
1626 iph = (struct iphdr *)skb->data;
1627 th = (struct tcphdr *)(skb->data + (iph->ihl << 2));
1628 length = (iph->ihl << 2) + (th->doff << 2) + lro_length;
1bcac3b0 1629 csum_replace2(&iph->check, iph->tot_len, htons(length));
4be41e92 1630 iph->tot_len = htons(length);
4be41e92
SC		 1631 }
1632
1633 th->psh = push;
1634 length = skb->len;
1635
99e85879
SS		 1636 if (adapter->flags & QLCNIC_FW_LRO_MSS_CAP) {
1637 gso_size = qlcnic_83xx_get_lro_sts_mss(sts_data[0]);
1638 skb_shinfo(skb)->gso_size = gso_size;
1639 if (skb->protocol == htons(ETH_P_IPV6))
1640 skb_shinfo(skb)->gso_type = SKB_GSO_TCPV6;
1641 else
1642 skb_shinfo(skb)->gso_type = SKB_GSO_TCPV4;
1643 }
1644
4be41e92 1645 if (vid != 0xffff)
86a9bad3 1646 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid);
4be41e92
SC		 1647
1648 netif_receive_skb(skb);
1649
1650 adapter->stats.lro_pkts++;
1651 adapter->stats.lrobytes += length;
1652 return buffer;
1653}
1654
1655static int qlcnic_83xx_process_rcv_ring(struct qlcnic_host_sds_ring *sds_ring,
1656 int max)
1657{
1658 struct qlcnic_host_rds_ring *rds_ring;
1659 struct qlcnic_adapter *adapter = sds_ring->adapter;
1660 struct list_head *cur;
1661 struct status_desc *desc;
1662 struct qlcnic_rx_buffer *rxbuf = NULL;
1663 u8 ring;
1664 u64 sts_data[2];
1665 int count = 0, opcode;
1666 u32 consumer = sds_ring->consumer;
1667
1668 while (count < max) {
1669 desc = &sds_ring->desc_head[consumer];
1670 sts_data[1] = le64_to_cpu(desc->status_desc_data[1]);
1671 opcode = qlcnic_83xx_opcode(sts_data[1]);
1672 if (!opcode)
1673 break;
1674 sts_data[0] = le64_to_cpu(desc->status_desc_data[0]);
1675 ring = QLCNIC_FETCH_RING_ID(sts_data[0]);
1676
1677 switch (opcode) {
1678 case QLC_83XX_REG_DESC:
1679 rxbuf = qlcnic_83xx_process_rcv(adapter, sds_ring,
1680 ring, sts_data);
1681 break;
1682 case QLC_83XX_LRO_DESC:
1683 rxbuf = qlcnic_83xx_process_lro(adapter, ring,
1684 sts_data);
1685 break;
1686 default:
1687 dev_info(&adapter->pdev->dev,
1688 "Unkonwn opcode: 0x%x\n", opcode);
1689 goto skip;
1690 }
1691
1692 if (likely(rxbuf))
1693 list_add_tail(&rxbuf->list, &sds_ring->free_list[ring]);
1694 else
1695 adapter->stats.null_rxbuf++;
1696skip:
1697 desc = &sds_ring->desc_head[consumer];
1698 /* Reset the descriptor */
1699 desc->status_desc_data[1] = 0;
1700 consumer = get_next_index(consumer, sds_ring->num_desc);
1701 count++;
1702 }
1703 for (ring = 0; ring < adapter->max_rds_rings; ring++) {
1704 rds_ring = &adapter->recv_ctx->rds_rings[ring];
1705 if (!list_empty(&sds_ring->free_list[ring])) {
1706 list_for_each(cur, &sds_ring->free_list[ring]) {
1707 rxbuf = list_entry(cur, struct qlcnic_rx_buffer,
1708 list);
1709 qlcnic_alloc_rx_skb(adapter, rds_ring, rxbuf);
1710 }
1711 spin_lock(&rds_ring->lock);
1712 list_splice_tail_init(&sds_ring->free_list[ring],
1713 &rds_ring->free_list);
1714 spin_unlock(&rds_ring->lock);
1715 }
1716 qlcnic_post_rx_buffers_nodb(adapter, rds_ring, ring);
1717 }
1718 if (count) {
1719 sds_ring->consumer = consumer;
1720 writel(consumer, sds_ring->crb_sts_consumer);
1721 }
1722 return count;
1723}
1724
da6c8063
RB		 1725static int qlcnic_83xx_msix_sriov_vf_poll(struct napi_struct *napi, int budget)
1726{
1727 int tx_complete;
1728 int work_done;
1729 struct qlcnic_host_sds_ring *sds_ring;
1730 struct qlcnic_adapter *adapter;
1731 struct qlcnic_host_tx_ring *tx_ring;
1732
1733 sds_ring = container_of(napi, struct qlcnic_host_sds_ring, napi);
1734 adapter = sds_ring->adapter;
1735 /* tx ring count = 1 */
1736 tx_ring = adapter->tx_ring;
1737
1738 tx_complete = qlcnic_process_cmd_ring(adapter, tx_ring, budget);
1739 work_done = qlcnic_83xx_process_rcv_ring(sds_ring, budget);
1740 if ((work_done < budget) && tx_complete) {
1741 napi_complete(&sds_ring->napi);
1742 qlcnic_83xx_enable_intr(adapter, sds_ring);
1743 }
1744
1745 return work_done;
1746}
1747
4be41e92
SC		 1748static int qlcnic_83xx_poll(struct napi_struct *napi, int budget)
1749{
1750 int tx_complete;
1751 int work_done;
1752 struct qlcnic_host_sds_ring *sds_ring;
1753 struct qlcnic_adapter *adapter;
1754 struct qlcnic_host_tx_ring *tx_ring;
1755
1756 sds_ring = container_of(napi, struct qlcnic_host_sds_ring, napi);
1757 adapter = sds_ring->adapter;
1758 /* tx ring count = 1 */
1759 tx_ring = adapter->tx_ring;
1760
4be41e92
SC		 1761 tx_complete = qlcnic_process_cmd_ring(adapter, tx_ring, budget);
1762 work_done = qlcnic_83xx_process_rcv_ring(sds_ring, budget);
1763 if ((work_done < budget) && tx_complete) {
1764 napi_complete(&sds_ring->napi);
ac166700 1765 qlcnic_83xx_enable_intr(adapter, sds_ring);
4be41e92
SC		 1766 }
1767
1768 return work_done;
1769}
1770
1771static int qlcnic_83xx_msix_tx_poll(struct napi_struct *napi, int budget)
1772{
1773 int work_done;
1774 struct qlcnic_host_tx_ring *tx_ring;
1775 struct qlcnic_adapter *adapter;
1776
1777 budget = QLCNIC_TX_POLL_BUDGET;
1778 tx_ring = container_of(napi, struct qlcnic_host_tx_ring, napi);
1779 adapter = tx_ring->adapter;
1780 work_done = qlcnic_process_cmd_ring(adapter, tx_ring, budget);
1781 if (work_done) {
1782 napi_complete(&tx_ring->napi);
1783 if (test_bit(__QLCNIC_DEV_UP , &adapter->state))
1784 qlcnic_83xx_enable_tx_intr(adapter, tx_ring);
1785 }
1786
1787 return work_done;
1788}
1789
1790static int qlcnic_83xx_rx_poll(struct napi_struct *napi, int budget)
1791{
1792 int work_done;
1793 struct qlcnic_host_sds_ring *sds_ring;
1794 struct qlcnic_adapter *adapter;
1795
1796 sds_ring = container_of(napi, struct qlcnic_host_sds_ring, napi);
1797 adapter = sds_ring->adapter;
1798 work_done = qlcnic_83xx_process_rcv_ring(sds_ring, budget);
1799 if (work_done < budget) {
1800 napi_complete(&sds_ring->napi);
1801 if (test_bit(__QLCNIC_DEV_UP, &adapter->state))
1802 qlcnic_83xx_enable_intr(adapter, sds_ring);
1803 }
1804
1805 return work_done;
1806}
1807
1808void qlcnic_83xx_napi_enable(struct qlcnic_adapter *adapter)
1809{
1810 int ring;
1811 struct qlcnic_host_sds_ring *sds_ring;
1812 struct qlcnic_host_tx_ring *tx_ring;
1813 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1814
1815 if (adapter->is_up != QLCNIC_ADAPTER_UP_MAGIC)
1816 return;
1817
1818 for (ring = 0; ring < adapter->max_sds_rings; ring++) {
1819 sds_ring = &recv_ctx->sds_rings[ring];
1820 napi_enable(&sds_ring->napi);
ac166700
HM		 1821 if (adapter->flags & QLCNIC_MSIX_ENABLED)
1822 qlcnic_83xx_enable_intr(adapter, sds_ring);
4be41e92
SC		 1823 }
1824
da6c8063
RB		 1825 if ((adapter->flags & QLCNIC_MSIX_ENABLED) &&
1826 !(adapter->flags & QLCNIC_TX_INTR_SHARED)) {
4be41e92
SC		 1827 for (ring = 0; ring < adapter->max_drv_tx_rings; ring++) {
1828 tx_ring = &adapter->tx_ring[ring];
1829 napi_enable(&tx_ring->napi);
1830 qlcnic_83xx_enable_tx_intr(adapter, tx_ring);
1831 }
1832 }
1833}
1834
1835void qlcnic_83xx_napi_disable(struct qlcnic_adapter *adapter)
1836{
1837 int ring;
1838 struct qlcnic_host_sds_ring *sds_ring;
1839 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1840 struct qlcnic_host_tx_ring *tx_ring;
1841
1842 if (adapter->is_up != QLCNIC_ADAPTER_UP_MAGIC)
1843 return;
1844
1845 for (ring = 0; ring < adapter->max_sds_rings; ring++) {
1846 sds_ring = &recv_ctx->sds_rings[ring];
ac166700
HM		 1847 if (adapter->flags & QLCNIC_MSIX_ENABLED)
1848 qlcnic_83xx_disable_intr(adapter, sds_ring);
4be41e92
SC		 1849 napi_synchronize(&sds_ring->napi);
1850 napi_disable(&sds_ring->napi);
1851 }
1852
da6c8063
RB		 1853 if ((adapter->flags & QLCNIC_MSIX_ENABLED) &&
1854 !(adapter->flags & QLCNIC_TX_INTR_SHARED)) {
4be41e92
SC		 1855 for (ring = 0; ring < adapter->max_drv_tx_rings; ring++) {
1856 tx_ring = &adapter->tx_ring[ring];
1857 qlcnic_83xx_disable_tx_intr(adapter, tx_ring);
1858 napi_synchronize(&tx_ring->napi);
1859 napi_disable(&tx_ring->napi);
1860 }
1861 }
1862}
1863
1864int qlcnic_83xx_napi_add(struct qlcnic_adapter *adapter,
1865 struct net_device *netdev)
1866{
da6c8063 1867 int ring, max_sds_rings, temp;
4be41e92
SC		 1868 struct qlcnic_host_sds_ring *sds_ring;
1869 struct qlcnic_host_tx_ring *tx_ring;
1870 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1871
1872 if (qlcnic_alloc_sds_rings(recv_ctx, adapter->max_sds_rings))
1873 return -ENOMEM;
1874
1875 max_sds_rings = adapter->max_sds_rings;
1876 for (ring = 0; ring < adapter->max_sds_rings; ring++) {
1877 sds_ring = &recv_ctx->sds_rings[ring];
da6c8063
RB		 1878 if (adapter->flags & QLCNIC_MSIX_ENABLED) {
1879 if (!(adapter->flags & QLCNIC_TX_INTR_SHARED)) {
1880 netif_napi_add(netdev, &sds_ring->napi,
1881 qlcnic_83xx_rx_poll,
1882 QLCNIC_NETDEV_WEIGHT * 2);
1883 } else {
1884 temp = QLCNIC_NETDEV_WEIGHT / max_sds_rings;
1885 netif_napi_add(netdev, &sds_ring->napi,
1886 qlcnic_83xx_msix_sriov_vf_poll,
1887 temp);
1888 }
1889
1890 } else {
4be41e92
SC		 1891 netif_napi_add(netdev, &sds_ring->napi,
1892 qlcnic_83xx_poll,
1893 QLCNIC_NETDEV_WEIGHT / max_sds_rings);
da6c8063 1894 }
4be41e92
SC		 1895 }
1896
1897 if (qlcnic_alloc_tx_rings(adapter, netdev)) {
1898 qlcnic_free_sds_rings(recv_ctx);
1899 return -ENOMEM;
1900 }
1901
da6c8063
RB		 1902 if ((adapter->flags & QLCNIC_MSIX_ENABLED) &&
1903 !(adapter->flags & QLCNIC_TX_INTR_SHARED)) {
4be41e92
SC		 1904 for (ring = 0; ring < adapter->max_drv_tx_rings; ring++) {
1905 tx_ring = &adapter->tx_ring[ring];
1906 netif_napi_add(netdev, &tx_ring->napi,
1907 qlcnic_83xx_msix_tx_poll,
1908 QLCNIC_NETDEV_WEIGHT);
1909 }
1910 }
1911
1912 return 0;
1913}
1914
1915void qlcnic_83xx_napi_del(struct qlcnic_adapter *adapter)
1916{
1917 int ring;
1918 struct qlcnic_host_sds_ring *sds_ring;
1919 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1920 struct qlcnic_host_tx_ring *tx_ring;
1921
1922 for (ring = 0; ring < adapter->max_sds_rings; ring++) {
1923 sds_ring = &recv_ctx->sds_rings[ring];
1924 netif_napi_del(&sds_ring->napi);
1925 }
1926
1927 qlcnic_free_sds_rings(adapter->recv_ctx);
1928
da6c8063
RB		 1929 if ((adapter->flags & QLCNIC_MSIX_ENABLED) &&
1930 !(adapter->flags & QLCNIC_TX_INTR_SHARED)) {
4be41e92
SC		 1931 for (ring = 0; ring < adapter->max_drv_tx_rings; ring++) {
1932 tx_ring = &adapter->tx_ring[ring];
1933 netif_napi_del(&tx_ring->napi);
1934 }
1935 }
1936
1937 qlcnic_free_tx_rings(adapter);
1938}
1939
1940void qlcnic_83xx_process_rcv_diag(struct qlcnic_adapter *adapter,
1941 int ring, u64 sts_data[])
1942{
1943 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1944 struct sk_buff *skb;
1945 struct qlcnic_host_rds_ring *rds_ring;
1946 int index, length;
1947
1948 if (unlikely(ring >= adapter->max_rds_rings))
1949 return;
1950
1951 rds_ring = &recv_ctx->rds_rings[ring];
1952 index = qlcnic_83xx_hndl(sts_data[0]);
1953 if (unlikely(index >= rds_ring->num_desc))
1954 return;
1955
1956 length = qlcnic_83xx_pktln(sts_data[0]);
1957
1958 skb = qlcnic_process_rxbuf(adapter, rds_ring, index, STATUS_CKSUM_OK);
1959 if (!skb)
1960 return;
1961
1962 if (length > rds_ring->skb_size)
1963 skb_put(skb, rds_ring->skb_size);
1964 else
1965 skb_put(skb, length);
1966
1967 if (!qlcnic_check_loopback_buff(skb->data, adapter->mac_addr))
1968 adapter->ahw->diag_cnt++;
1969 else
1970 dump_skb(skb, adapter);
1971
1972 dev_kfree_skb_any(skb);
1973 return;
1974}
1975
1976void qlcnic_83xx_process_rcv_ring_diag(struct qlcnic_host_sds_ring *sds_ring)
1977{
1978 struct qlcnic_adapter *adapter = sds_ring->adapter;
1979 struct status_desc *desc;
1980 u64 sts_data[2];
1981 int ring, opcode;
1982 u32 consumer = sds_ring->consumer;
1983
1984 desc = &sds_ring->desc_head[consumer];
1985 sts_data[0] = le64_to_cpu(desc->status_desc_data[0]);
1986 sts_data[1] = le64_to_cpu(desc->status_desc_data[1]);
1987 opcode = qlcnic_83xx_opcode(sts_data[1]);
1988 if (!opcode)
1989 return;
1990
1991 ring = QLCNIC_FETCH_RING_ID(qlcnic_83xx_hndl(sts_data[0]));
1992 qlcnic_83xx_process_rcv_diag(adapter, ring, sts_data);
1993 desc = &sds_ring->desc_head[consumer];
1994 desc->status_desc_data[0] = cpu_to_le64(STATUS_OWNER_PHANTOM);
1995 consumer = get_next_index(consumer, sds_ring->num_desc);
1996 sds_ring->consumer = consumer;
1997 writel(consumer, sds_ring->crb_sts_consumer);
1998}
Linux kernel - Deliverables
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