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[mirror_ubuntu-artful-kernel.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>
12
13#include "qlcnic.h"
14
c70001a9
SC		 15#define TX_ETHER_PKT 0x01
16#define TX_TCP_PKT 0x02
17#define TX_UDP_PKT 0x03
18#define TX_IP_PKT 0x04
19#define TX_TCP_LSO 0x05
20#define TX_TCP_LSO6 0x06
21#define TX_TCPV6_PKT 0x0b
22#define TX_UDPV6_PKT 0x0c
23#define FLAGS_VLAN_TAGGED 0x10
24#define FLAGS_VLAN_OOB 0x40
25
26#define qlcnic_set_tx_vlan_tci(cmd_desc, v) \
27 (cmd_desc)->vlan_TCI = cpu_to_le16(v);
28#define qlcnic_set_cmd_desc_port(cmd_desc, var) \
29 ((cmd_desc)->port_ctxid |= ((var) & 0x0F))
30#define qlcnic_set_cmd_desc_ctxid(cmd_desc, var) \
31 ((cmd_desc)->port_ctxid |= ((var) << 4 & 0xF0))
32
33#define qlcnic_set_tx_port(_desc, _port) \
34 ((_desc)->port_ctxid = ((_port) & 0xf) | (((_port) << 4) & 0xf0))
35
36#define qlcnic_set_tx_flags_opcode(_desc, _flags, _opcode) \
37 ((_desc)->flags_opcode |= \
38 cpu_to_le16(((_flags) & 0x7f) | (((_opcode) & 0x3f) << 7)))
39
40#define qlcnic_set_tx_frags_len(_desc, _frags, _len) \
41 ((_desc)->nfrags__length = \
42 cpu_to_le32(((_frags) & 0xff) | (((_len) & 0xffffff) << 8)))
43
44/* owner bits of status_desc */
45#define STATUS_OWNER_HOST (0x1ULL << 56)
46#define STATUS_OWNER_PHANTOM (0x2ULL << 56)
47
48/* Status descriptor:
49 0-3 port, 4-7 status, 8-11 type, 12-27 total_length
50 28-43 reference_handle, 44-47 protocol, 48-52 pkt_offset
51 53-55 desc_cnt, 56-57 owner, 58-63 opcode
52 */
53#define qlcnic_get_sts_port(sts_data) \
54 ((sts_data) & 0x0F)
55#define qlcnic_get_sts_status(sts_data) \
56 (((sts_data) >> 4) & 0x0F)
57#define qlcnic_get_sts_type(sts_data) \
58 (((sts_data) >> 8) & 0x0F)
59#define qlcnic_get_sts_totallength(sts_data) \
60 (((sts_data) >> 12) & 0xFFFF)
61#define qlcnic_get_sts_refhandle(sts_data) \
62 (((sts_data) >> 28) & 0xFFFF)
63#define qlcnic_get_sts_prot(sts_data) \
64 (((sts_data) >> 44) & 0x0F)
65#define qlcnic_get_sts_pkt_offset(sts_data) \
66 (((sts_data) >> 48) & 0x1F)
67#define qlcnic_get_sts_desc_cnt(sts_data) \
68 (((sts_data) >> 53) & 0x7)
69#define qlcnic_get_sts_opcode(sts_data) \
70 (((sts_data) >> 58) & 0x03F)
71
72#define qlcnic_get_lro_sts_refhandle(sts_data) \
5796bd04 73 ((sts_data) & 0x07FFF)
c70001a9
SC		 74#define qlcnic_get_lro_sts_length(sts_data) \
75 (((sts_data) >> 16) & 0x0FFFF)
76#define qlcnic_get_lro_sts_l2_hdr_offset(sts_data) \
77 (((sts_data) >> 32) & 0x0FF)
78#define qlcnic_get_lro_sts_l4_hdr_offset(sts_data) \
79 (((sts_data) >> 40) & 0x0FF)
80#define qlcnic_get_lro_sts_timestamp(sts_data) \
81 (((sts_data) >> 48) & 0x1)
82#define qlcnic_get_lro_sts_type(sts_data) \
83 (((sts_data) >> 49) & 0x7)
84#define qlcnic_get_lro_sts_push_flag(sts_data) \
85 (((sts_data) >> 52) & 0x1)
86#define qlcnic_get_lro_sts_seq_number(sts_data) \
87 ((sts_data) & 0x0FFFFFFFF)
88#define qlcnic_get_lro_sts_mss(sts_data1) \
89 ((sts_data1 >> 32) & 0x0FFFF)
90
99e85879
SS		 91#define qlcnic_83xx_get_lro_sts_mss(sts) ((sts) & 0xffff)
92
c70001a9
SC		 93/* opcode field in status_desc */
94#define QLCNIC_SYN_OFFLOAD 0x03
95#define QLCNIC_RXPKT_DESC 0x04
96#define QLCNIC_OLD_RXPKT_DESC 0x3f
97#define QLCNIC_RESPONSE_DESC 0x05
98#define QLCNIC_LRO_DESC 0x12
99
4be41e92
SC		 100#define QLCNIC_TX_POLL_BUDGET 128
101#define QLCNIC_TCP_HDR_SIZE 20
102#define QLCNIC_TCP_TS_OPTION_SIZE 12
103#define QLCNIC_FETCH_RING_ID(handle) ((handle) >> 63)
104#define QLCNIC_DESC_OWNER_FW cpu_to_le64(STATUS_OWNER_PHANTOM)
105
106#define QLCNIC_TCP_TS_HDR_SIZE (QLCNIC_TCP_HDR_SIZE + QLCNIC_TCP_TS_OPTION_SIZE)
107
c70001a9
SC		 108/* for status field in status_desc */
109#define STATUS_CKSUM_LOOP 0
110#define STATUS_CKSUM_OK 2
d17dd0d9 111
4be41e92
SC		 112#define qlcnic_83xx_pktln(sts) ((sts >> 32) & 0x3FFF)
113#define qlcnic_83xx_hndl(sts) ((sts >> 48) & 0x7FFF)
114#define qlcnic_83xx_csum_status(sts) ((sts >> 39) & 7)
115#define qlcnic_83xx_opcode(sts) ((sts >> 42) & 0xF)
116#define qlcnic_83xx_vlan_tag(sts) (((sts) >> 48) & 0xFFFF)
117#define qlcnic_83xx_lro_pktln(sts) (((sts) >> 32) & 0x3FFF)
118#define qlcnic_83xx_l2_hdr_off(sts) (((sts) >> 16) & 0xFF)
119#define qlcnic_83xx_l4_hdr_off(sts) (((sts) >> 24) & 0xFF)
120#define qlcnic_83xx_pkt_cnt(sts) (((sts) >> 16) & 0x7)
121#define qlcnic_83xx_is_tstamp(sts) (((sts) >> 40) & 1)
122#define qlcnic_83xx_is_psh_bit(sts) (((sts) >> 41) & 1)
123#define qlcnic_83xx_is_ip_align(sts) (((sts) >> 46) & 1)
124#define qlcnic_83xx_has_vlan_tag(sts) (((sts) >> 47) & 1)
125
126struct sk_buff *qlcnic_process_rxbuf(struct qlcnic_adapter *,
127 struct qlcnic_host_rds_ring *, u16, u16);
128
129inline void qlcnic_83xx_enable_tx_intr(struct qlcnic_adapter *adapter,
130 struct qlcnic_host_tx_ring *tx_ring)
131{
132 writel(0, tx_ring->crb_intr_mask);
133}
134
135inline void qlcnic_83xx_disable_tx_intr(struct qlcnic_adapter *adapter,
136 struct qlcnic_host_tx_ring *tx_ring)
137{
138 writel(1, tx_ring->crb_intr_mask);
139}
140
141static inline u8 qlcnic_mac_hash(u64 mac)
142{
143 return (u8)((mac & 0xff) ^ ((mac >> 40) & 0xff));
144}
145
146static inline u32 qlcnic_get_ref_handle(struct qlcnic_adapter *adapter,
147 u16 handle, u8 ring_id)
148{
149 if (adapter->pdev->device == PCI_DEVICE_ID_QLOGIC_QLE834X)
150 return handle | (ring_id << 15);
151 else
152 return handle;
153}
154
53643a75
SS		 155static inline int qlcnic_82xx_is_lb_pkt(u64 sts_data)
156{
157 return (qlcnic_get_sts_status(sts_data) == STATUS_CKSUM_LOOP) ? 1 : 0;
158}
159
160void qlcnic_add_lb_filter(struct qlcnic_adapter *adapter, struct sk_buff *skb,
161 int loopback_pkt, __le16 vlan_id)
162{
163 struct ethhdr *phdr = (struct ethhdr *)(skb->data);
164 struct qlcnic_filter *fil, *tmp_fil;
b67bfe0d 165 struct hlist_node *n;
53643a75
SS		 166 struct hlist_head *head;
167 unsigned long time;
168 u64 src_addr = 0;
169 u8 hindex, found = 0, op;
170 int ret;
171
172 memcpy(&src_addr, phdr->h_source, ETH_ALEN);
173
174 if (loopback_pkt) {
175 if (adapter->rx_fhash.fnum >= adapter->rx_fhash.fmax)
176 return;
177
178 hindex = qlcnic_mac_hash(src_addr) &
179 (adapter->fhash.fbucket_size - 1);
180 head = &(adapter->rx_fhash.fhead[hindex]);
181
b67bfe0d 182 hlist_for_each_entry_safe(tmp_fil, n, head, fnode) {
53643a75
SS		 183 if (!memcmp(tmp_fil->faddr, &src_addr, ETH_ALEN) &&
184 tmp_fil->vlan_id == vlan_id) {
185 time = tmp_fil->ftime;
186 if (jiffies > (QLCNIC_READD_AGE * HZ + time))
187 tmp_fil->ftime = jiffies;
188 return;
189 }
190 }
191
192 fil = kzalloc(sizeof(struct qlcnic_filter), GFP_ATOMIC);
193 if (!fil)
194 return;
195
196 fil->ftime = jiffies;
197 memcpy(fil->faddr, &src_addr, ETH_ALEN);
198 fil->vlan_id = vlan_id;
199 spin_lock(&adapter->rx_mac_learn_lock);
200 hlist_add_head(&(fil->fnode), head);
201 adapter->rx_fhash.fnum++;
202 spin_unlock(&adapter->rx_mac_learn_lock);
203 } else {
204 hindex = qlcnic_mac_hash(src_addr) &
205 (adapter->fhash.fbucket_size - 1);
206 head = &(adapter->rx_fhash.fhead[hindex]);
207 spin_lock(&adapter->rx_mac_learn_lock);
b67bfe0d 208 hlist_for_each_entry_safe(tmp_fil, n, head, fnode) {
53643a75
SS		 209 if (!memcmp(tmp_fil->faddr, &src_addr, ETH_ALEN) &&
210 tmp_fil->vlan_id == vlan_id) {
211 found = 1;
212 break;
213 }
214 }
215
216 if (!found) {
217 spin_unlock(&adapter->rx_mac_learn_lock);
218 return;
219 }
220
221 op = vlan_id ? QLCNIC_MAC_VLAN_ADD : QLCNIC_MAC_ADD;
222 ret = qlcnic_sre_macaddr_change(adapter, (u8 *)&src_addr,
223 vlan_id, op);
224 if (!ret) {
225 op = vlan_id ? QLCNIC_MAC_VLAN_DEL : QLCNIC_MAC_DEL;
226 ret = qlcnic_sre_macaddr_change(adapter,
227 (u8 *)&src_addr,
228 vlan_id, op);
229 if (!ret) {
230 hlist_del(&(tmp_fil->fnode));
231 adapter->rx_fhash.fnum--;
232 }
233 }
234 spin_unlock(&adapter->rx_mac_learn_lock);
235 }
236}
237
7e2cf4fe
SC		 238void qlcnic_82xx_change_filter(struct qlcnic_adapter *adapter, u64 *uaddr,
239 __le16 vlan_id)
c70001a9
SC		 240{
241 struct cmd_desc_type0 *hwdesc;
242 struct qlcnic_nic_req *req;
243 struct qlcnic_mac_req *mac_req;
244 struct qlcnic_vlan_req *vlan_req;
7e2cf4fe 245 struct qlcnic_host_tx_ring *tx_ring = adapter->tx_ring;
c70001a9
SC		 246 u32 producer;
247 u64 word;
248
249 producer = tx_ring->producer;
250 hwdesc = &tx_ring->desc_head[tx_ring->producer];
251
252 req = (struct qlcnic_nic_req *)hwdesc;
253 memset(req, 0, sizeof(struct qlcnic_nic_req));
254 req->qhdr = cpu_to_le64(QLCNIC_REQUEST << 23);
255
256 word = QLCNIC_MAC_EVENT | ((u64)(adapter->portnum) << 16);
257 req->req_hdr = cpu_to_le64(word);
258
259 mac_req = (struct qlcnic_mac_req *)&(req->words[0]);
260 mac_req->op = vlan_id ? QLCNIC_MAC_VLAN_ADD : QLCNIC_MAC_ADD;
261 memcpy(mac_req->mac_addr, &uaddr, ETH_ALEN);
262
263 vlan_req = (struct qlcnic_vlan_req *)&req->words[1];
264 vlan_req->vlan_id = vlan_id;
265
266 tx_ring->producer = get_next_index(producer, tx_ring->num_desc);
267 smp_mb();
268}
269
d17dd0d9 270static void qlcnic_send_filter(struct qlcnic_adapter *adapter,
d17dd0d9
SC		 271 struct cmd_desc_type0 *first_desc,
272 struct sk_buff *skb)
c70001a9 273{
c70001a9 274 struct qlcnic_filter *fil, *tmp_fil;
b67bfe0d 275 struct hlist_node *n;
c70001a9 276 struct hlist_head *head;
4be41e92 277 struct net_device *netdev = adapter->netdev;
7e2cf4fe 278 struct ethhdr *phdr = (struct ethhdr *)(skb->data);
c70001a9
SC		 279 u64 src_addr = 0;
280 __le16 vlan_id = 0;
281 u8 hindex;
282
4be41e92 283 if (ether_addr_equal(phdr->h_source, adapter->mac_addr))
c70001a9
SC		 284 return;
285
4be41e92
SC		 286 if (adapter->fhash.fnum >= adapter->fhash.fmax) {
287 adapter->stats.mac_filter_limit_overrun++;
288 netdev_info(netdev, "Can not add more than %d mac addresses\n",
289 adapter->fhash.fmax);
c70001a9 290 return;
4be41e92 291 }
c70001a9 292
c70001a9 293 memcpy(&src_addr, phdr->h_source, ETH_ALEN);
4be41e92 294 hindex = qlcnic_mac_hash(src_addr) & (adapter->fhash.fbucket_size - 1);
c70001a9
SC		 295 head = &(adapter->fhash.fhead[hindex]);
296
b67bfe0d 297 hlist_for_each_entry_safe(tmp_fil, n, head, fnode) {
c70001a9 298 if (!memcmp(tmp_fil->faddr, &src_addr, ETH_ALEN) &&
7e2cf4fe 299 tmp_fil->vlan_id == vlan_id) {
d17dd0d9 300 if (jiffies > (QLCNIC_READD_AGE * HZ + tmp_fil->ftime))
7e2cf4fe
SC		 301 qlcnic_change_filter(adapter, &src_addr,
302 vlan_id);
c70001a9
SC		 303 tmp_fil->ftime = jiffies;
304 return;
305 }
306 }
307
308 fil = kzalloc(sizeof(struct qlcnic_filter), GFP_ATOMIC);
309 if (!fil)
310 return;
311
7e2cf4fe 312 qlcnic_change_filter(adapter, &src_addr, vlan_id);
c70001a9
SC		 313 fil->ftime = jiffies;
314 fil->vlan_id = vlan_id;
315 memcpy(fil->faddr, &src_addr, ETH_ALEN);
316 spin_lock(&adapter->mac_learn_lock);
317 hlist_add_head(&(fil->fnode), head);
318 adapter->fhash.fnum++;
319 spin_unlock(&adapter->mac_learn_lock);
320}
321
d17dd0d9
SC		 322static int qlcnic_tx_pkt(struct qlcnic_adapter *adapter,
323 struct cmd_desc_type0 *first_desc, struct sk_buff *skb)
c70001a9 324{
d17dd0d9 325 u8 l4proto, opcode = 0, hdr_len = 0;
c70001a9 326 u16 flags = 0, vlan_tci = 0;
d17dd0d9 327 int copied, offset, copy_len, size;
c70001a9
SC		 328 struct cmd_desc_type0 *hwdesc;
329 struct vlan_ethhdr *vh;
330 struct qlcnic_host_tx_ring *tx_ring = adapter->tx_ring;
331 u16 protocol = ntohs(skb->protocol);
332 u32 producer = tx_ring->producer;
333
334 if (protocol == ETH_P_8021Q) {
335 vh = (struct vlan_ethhdr *)skb->data;
336 flags = FLAGS_VLAN_TAGGED;
337 vlan_tci = ntohs(vh->h_vlan_TCI);
338 protocol = ntohs(vh->h_vlan_encapsulated_proto);
339 } else if (vlan_tx_tag_present(skb)) {
340 flags = FLAGS_VLAN_OOB;
341 vlan_tci = vlan_tx_tag_get(skb);
342 }
343 if (unlikely(adapter->pvid)) {
344 if (vlan_tci && !(adapter->flags & QLCNIC_TAGGING_ENABLED))
345 return -EIO;
346 if (vlan_tci && (adapter->flags & QLCNIC_TAGGING_ENABLED))
347 goto set_flags;
348
349 flags = FLAGS_VLAN_OOB;
350 vlan_tci = adapter->pvid;
351 }
352set_flags:
353 qlcnic_set_tx_vlan_tci(first_desc, vlan_tci);
354 qlcnic_set_tx_flags_opcode(first_desc, flags, opcode);
355
356 if (*(skb->data) & BIT_0) {
357 flags |= BIT_0;
358 memcpy(&first_desc->eth_addr, skb->data, ETH_ALEN);
359 }
360 opcode = TX_ETHER_PKT;
361 if ((adapter->netdev->features & (NETIF_F_TSO | NETIF_F_TSO6)) &&
d17dd0d9 362 skb_shinfo(skb)->gso_size > 0) {
c70001a9 363 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
c70001a9
SC		 364 first_desc->mss = cpu_to_le16(skb_shinfo(skb)->gso_size);
365 first_desc->total_hdr_length = hdr_len;
c70001a9
SC		 366 opcode = (protocol == ETH_P_IPV6) ? TX_TCP_LSO6 : TX_TCP_LSO;
367
368 /* For LSO, we need to copy the MAC/IP/TCP headers into
369 * the descriptor ring */
370 copied = 0;
371 offset = 2;
372
373 if (flags & FLAGS_VLAN_OOB) {
374 first_desc->total_hdr_length += VLAN_HLEN;
375 first_desc->tcp_hdr_offset = VLAN_HLEN;
376 first_desc->ip_hdr_offset = VLAN_HLEN;
d17dd0d9 377
c70001a9
SC		 378 /* Only in case of TSO on vlan device */
379 flags |= FLAGS_VLAN_TAGGED;
380
381 /* Create a TSO vlan header template for firmware */
c70001a9
SC		 382 hwdesc = &tx_ring->desc_head[producer];
383 tx_ring->cmd_buf_arr[producer].skb = NULL;
384
385 copy_len = min((int)sizeof(struct cmd_desc_type0) -
d17dd0d9 386 offset, hdr_len + VLAN_HLEN);
c70001a9
SC		 387
388 vh = (struct vlan_ethhdr *)((char *) hwdesc + 2);
389 skb_copy_from_linear_data(skb, vh, 12);
390 vh->h_vlan_proto = htons(ETH_P_8021Q);
391 vh->h_vlan_TCI = htons(vlan_tci);
392
393 skb_copy_from_linear_data_offset(skb, 12,
d17dd0d9
SC		 394 (char *)vh + 16,
395 copy_len - 16);
c70001a9
SC		 396 copied = copy_len - VLAN_HLEN;
397 offset = 0;
c70001a9
SC		 398 producer = get_next_index(producer, tx_ring->num_desc);
399 }
400
401 while (copied < hdr_len) {
d17dd0d9
SC		 402 size = (int)sizeof(struct cmd_desc_type0) - offset;
403 copy_len = min(size, (hdr_len - copied));
c70001a9
SC		 404 hwdesc = &tx_ring->desc_head[producer];
405 tx_ring->cmd_buf_arr[producer].skb = NULL;
c70001a9 406 skb_copy_from_linear_data_offset(skb, copied,
d17dd0d9
SC		 407 (char *)hwdesc +
408 offset, copy_len);
c70001a9
SC		 409 copied += copy_len;
410 offset = 0;
c70001a9
SC		 411 producer = get_next_index(producer, tx_ring->num_desc);
412 }
413
414 tx_ring->producer = producer;
415 smp_mb();
416 adapter->stats.lso_frames++;
417
418 } else if (skb->ip_summed == CHECKSUM_PARTIAL) {
c70001a9
SC		 419 if (protocol == ETH_P_IP) {
420 l4proto = ip_hdr(skb)->protocol;
421
422 if (l4proto == IPPROTO_TCP)
423 opcode = TX_TCP_PKT;
424 else if (l4proto == IPPROTO_UDP)
425 opcode = TX_UDP_PKT;
426 } else if (protocol == ETH_P_IPV6) {
427 l4proto = ipv6_hdr(skb)->nexthdr;
428
429 if (l4proto == IPPROTO_TCP)
430 opcode = TX_TCPV6_PKT;
431 else if (l4proto == IPPROTO_UDP)
432 opcode = TX_UDPV6_PKT;
433 }
434 }
435 first_desc->tcp_hdr_offset += skb_transport_offset(skb);
436 first_desc->ip_hdr_offset += skb_network_offset(skb);
437 qlcnic_set_tx_flags_opcode(first_desc, flags, opcode);
438
439 return 0;
440}
441
d17dd0d9
SC		 442static int qlcnic_map_tx_skb(struct pci_dev *pdev, struct sk_buff *skb,
443 struct qlcnic_cmd_buffer *pbuf)
c70001a9
SC		 444{
445 struct qlcnic_skb_frag *nf;
446 struct skb_frag_struct *frag;
447 int i, nr_frags;
448 dma_addr_t map;
449
450 nr_frags = skb_shinfo(skb)->nr_frags;
451 nf = &pbuf->frag_array[0];
452
d17dd0d9
SC		 453 map = pci_map_single(pdev, skb->data, skb_headlen(skb),
454 PCI_DMA_TODEVICE);
c70001a9
SC		 455 if (pci_dma_mapping_error(pdev, map))
456 goto out_err;
457
458 nf->dma = map;
459 nf->length = skb_headlen(skb);
460
461 for (i = 0; i < nr_frags; i++) {
462 frag = &skb_shinfo(skb)->frags[i];
463 nf = &pbuf->frag_array[i+1];
c70001a9
SC		 464 map = skb_frag_dma_map(&pdev->dev, frag, 0, skb_frag_size(frag),
465 DMA_TO_DEVICE);
466 if (dma_mapping_error(&pdev->dev, map))
467 goto unwind;
468
469 nf->dma = map;
470 nf->length = skb_frag_size(frag);
471 }
472
473 return 0;
474
475unwind:
476 while (--i >= 0) {
477 nf = &pbuf->frag_array[i+1];
478 pci_unmap_page(pdev, nf->dma, nf->length, PCI_DMA_TODEVICE);
479 }
480
481 nf = &pbuf->frag_array[0];
482 pci_unmap_single(pdev, nf->dma, skb_headlen(skb), PCI_DMA_TODEVICE);
483
484out_err:
485 return -ENOMEM;
486}
487
d17dd0d9
SC		 488static void qlcnic_unmap_buffers(struct pci_dev *pdev, struct sk_buff *skb,
489 struct qlcnic_cmd_buffer *pbuf)
c70001a9
SC		 490{
491 struct qlcnic_skb_frag *nf = &pbuf->frag_array[0];
d17dd0d9 492 int i, nr_frags = skb_shinfo(skb)->nr_frags;
c70001a9
SC		 493
494 for (i = 0; i < nr_frags; i++) {
495 nf = &pbuf->frag_array[i+1];
496 pci_unmap_page(pdev, nf->dma, nf->length, PCI_DMA_TODEVICE);
497 }
498
499 nf = &pbuf->frag_array[0];
500 pci_unmap_single(pdev, nf->dma, skb_headlen(skb), PCI_DMA_TODEVICE);
501 pbuf->skb = NULL;
502}
503
d17dd0d9 504static inline void qlcnic_clear_cmddesc(u64 *desc)
c70001a9
SC		 505{
506 desc[0] = 0ULL;
507 desc[2] = 0ULL;
508 desc[7] = 0ULL;
509}
510
d17dd0d9 511netdev_tx_t qlcnic_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
c70001a9
SC		 512{
513 struct qlcnic_adapter *adapter = netdev_priv(netdev);
514 struct qlcnic_host_tx_ring *tx_ring = adapter->tx_ring;
515 struct qlcnic_cmd_buffer *pbuf;
516 struct qlcnic_skb_frag *buffrag;
517 struct cmd_desc_type0 *hwdesc, *first_desc;
518 struct pci_dev *pdev;
519 struct ethhdr *phdr;
d17dd0d9
SC		 520 int i, k, frag_count, delta = 0;
521 u32 producer, num_txd;
c70001a9 522
d17dd0d9 523 num_txd = tx_ring->num_desc;
c70001a9
SC		 524
525 if (!test_bit(__QLCNIC_DEV_UP, &adapter->state)) {
526 netif_stop_queue(netdev);
527 return NETDEV_TX_BUSY;
528 }
529
530 if (adapter->flags & QLCNIC_MACSPOOF) {
531 phdr = (struct ethhdr *)skb->data;
532 if (!ether_addr_equal(phdr->h_source, adapter->mac_addr))
533 goto drop_packet;
534 }
535
536 frag_count = skb_shinfo(skb)->nr_frags + 1;
537 /* 14 frags supported for normal packet and
538 * 32 frags supported for TSO packet
539 */
540 if (!skb_is_gso(skb) && frag_count > QLCNIC_MAX_FRAGS_PER_TX) {
c70001a9
SC		 541 for (i = 0; i < (frag_count - QLCNIC_MAX_FRAGS_PER_TX); i++)
542 delta += skb_frag_size(&skb_shinfo(skb)->frags[i]);
543
544 if (!__pskb_pull_tail(skb, delta))
545 goto drop_packet;
546
547 frag_count = 1 + skb_shinfo(skb)->nr_frags;
548 }
549
550 if (unlikely(qlcnic_tx_avail(tx_ring) <= TX_STOP_THRESH)) {
551 netif_stop_queue(netdev);
d17dd0d9 552 if (qlcnic_tx_avail(tx_ring) > TX_STOP_THRESH) {
c70001a9 553 netif_start_queue(netdev);
d17dd0d9 554 } else {
c70001a9
SC		 555 adapter->stats.xmit_off++;
556 return NETDEV_TX_BUSY;
557 }
558 }
559
560 producer = tx_ring->producer;
561 pbuf = &tx_ring->cmd_buf_arr[producer];
c70001a9 562 pdev = adapter->pdev;
d17dd0d9
SC		 563 first_desc = &tx_ring->desc_head[producer];
564 hwdesc = &tx_ring->desc_head[producer];
c70001a9
SC		 565 qlcnic_clear_cmddesc((u64 *)hwdesc);
566
567 if (qlcnic_map_tx_skb(pdev, skb, pbuf)) {
568 adapter->stats.tx_dma_map_error++;
569 goto drop_packet;
570 }
571
572 pbuf->skb = skb;
573 pbuf->frag_count = frag_count;
574
575 qlcnic_set_tx_frags_len(first_desc, frag_count, skb->len);
576 qlcnic_set_tx_port(first_desc, adapter->portnum);
577
578 for (i = 0; i < frag_count; i++) {
c70001a9
SC		 579 k = i % 4;
580
581 if ((k == 0) && (i > 0)) {
582 /* move to next desc.*/
583 producer = get_next_index(producer, num_txd);
584 hwdesc = &tx_ring->desc_head[producer];
585 qlcnic_clear_cmddesc((u64 *)hwdesc);
586 tx_ring->cmd_buf_arr[producer].skb = NULL;
587 }
588
589 buffrag = &pbuf->frag_array[i];
c70001a9
SC		 590 hwdesc->buffer_length[k] = cpu_to_le16(buffrag->length);
591 switch (k) {
592 case 0:
593 hwdesc->addr_buffer1 = cpu_to_le64(buffrag->dma);
594 break;
595 case 1:
596 hwdesc->addr_buffer2 = cpu_to_le64(buffrag->dma);
597 break;
598 case 2:
599 hwdesc->addr_buffer3 = cpu_to_le64(buffrag->dma);
600 break;
601 case 3:
602 hwdesc->addr_buffer4 = cpu_to_le64(buffrag->dma);
603 break;
604 }
605 }
606
607 tx_ring->producer = get_next_index(producer, num_txd);
608 smp_mb();
609
610 if (unlikely(qlcnic_tx_pkt(adapter, first_desc, skb)))
611 goto unwind_buff;
612
fe1adc6b 613 if (adapter->drv_mac_learn)
4be41e92 614 qlcnic_send_filter(adapter, first_desc, skb);
c70001a9
SC		 615
616 adapter->stats.txbytes += skb->len;
617 adapter->stats.xmitcalled++;
618
619 qlcnic_update_cmd_producer(tx_ring);
620
621 return NETDEV_TX_OK;
622
623unwind_buff:
624 qlcnic_unmap_buffers(pdev, skb, pbuf);
625drop_packet:
626 adapter->stats.txdropped++;
627 dev_kfree_skb_any(skb);
628 return NETDEV_TX_OK;
629}
630
7f966452 631void qlcnic_advert_link_change(struct qlcnic_adapter *adapter, int linkup)
c70001a9
SC		 632{
633 struct net_device *netdev = adapter->netdev;
634
635 if (adapter->ahw->linkup && !linkup) {
636 netdev_info(netdev, "NIC Link is down\n");
637 adapter->ahw->linkup = 0;
638 if (netif_running(netdev)) {
639 netif_carrier_off(netdev);
640 netif_stop_queue(netdev);
641 }
642 } else if (!adapter->ahw->linkup && linkup) {
643 netdev_info(netdev, "NIC Link is up\n");
644 adapter->ahw->linkup = 1;
645 if (netif_running(netdev)) {
646 netif_carrier_on(netdev);
647 netif_wake_queue(netdev);
648 }
649 }
650}
651
d17dd0d9
SC		 652static int qlcnic_alloc_rx_skb(struct qlcnic_adapter *adapter,
653 struct qlcnic_host_rds_ring *rds_ring,
654 struct qlcnic_rx_buffer *buffer)
c70001a9
SC		 655{
656 struct sk_buff *skb;
657 dma_addr_t dma;
658 struct pci_dev *pdev = adapter->pdev;
659
660 skb = netdev_alloc_skb(adapter->netdev, rds_ring->skb_size);
661 if (!skb) {
662 adapter->stats.skb_alloc_failure++;
663 return -ENOMEM;
664 }
665
666 skb_reserve(skb, NET_IP_ALIGN);
4be41e92
SC		 667 dma = pci_map_single(pdev, skb->data,
668 rds_ring->dma_size, PCI_DMA_FROMDEVICE);
c70001a9
SC		 669
670 if (pci_dma_mapping_error(pdev, dma)) {
671 adapter->stats.rx_dma_map_error++;
672 dev_kfree_skb_any(skb);
673 return -ENOMEM;
674 }
675
676 buffer->skb = skb;
677 buffer->dma = dma;
678
679 return 0;
680}
681
682static void qlcnic_post_rx_buffers_nodb(struct qlcnic_adapter *adapter,
4be41e92
SC		 683 struct qlcnic_host_rds_ring *rds_ring,
684 u8 ring_id)
c70001a9
SC		 685{
686 struct rcv_desc *pdesc;
687 struct qlcnic_rx_buffer *buffer;
688 int count = 0;
4be41e92 689 uint32_t producer, handle;
c70001a9
SC		 690 struct list_head *head;
691
692 if (!spin_trylock(&rds_ring->lock))
693 return;
694
695 producer = rds_ring->producer;
c70001a9 696 head = &rds_ring->free_list;
d17dd0d9 697 while (!list_empty(head)) {
c70001a9
SC		 698 buffer = list_entry(head->next, struct qlcnic_rx_buffer, list);
699
700 if (!buffer->skb) {
701 if (qlcnic_alloc_rx_skb(adapter, rds_ring, buffer))
702 break;
703 }
c70001a9
SC		 704 count++;
705 list_del(&buffer->list);
706
707 /* make a rcv descriptor */
708 pdesc = &rds_ring->desc_head[producer];
4be41e92
SC		 709 handle = qlcnic_get_ref_handle(adapter,
710 buffer->ref_handle, ring_id);
711 pdesc->reference_handle = cpu_to_le16(handle);
c70001a9
SC		 712 pdesc->buffer_length = cpu_to_le32(rds_ring->dma_size);
713 pdesc->addr_buffer = cpu_to_le64(buffer->dma);
c70001a9
SC		 714 producer = get_next_index(producer, rds_ring->num_desc);
715 }
c70001a9
SC		 716 if (count) {
717 rds_ring->producer = producer;
718 writel((producer - 1) & (rds_ring->num_desc - 1),
d17dd0d9 719 rds_ring->crb_rcv_producer);
c70001a9
SC		 720 }
721 spin_unlock(&rds_ring->lock);
722}
723
4be41e92
SC		 724static int qlcnic_process_cmd_ring(struct qlcnic_adapter *adapter,
725 struct qlcnic_host_tx_ring *tx_ring,
726 int budget)
c70001a9
SC		 727{
728 u32 sw_consumer, hw_consumer;
d17dd0d9 729 int i, done, count = 0;
c70001a9
SC		 730 struct qlcnic_cmd_buffer *buffer;
731 struct pci_dev *pdev = adapter->pdev;
732 struct net_device *netdev = adapter->netdev;
733 struct qlcnic_skb_frag *frag;
c70001a9
SC		 734
735 if (!spin_trylock(&adapter->tx_clean_lock))
736 return 1;
737
738 sw_consumer = tx_ring->sw_consumer;
739 hw_consumer = le32_to_cpu(*(tx_ring->hw_consumer));
740
741 while (sw_consumer != hw_consumer) {
742 buffer = &tx_ring->cmd_buf_arr[sw_consumer];
743 if (buffer->skb) {
744 frag = &buffer->frag_array[0];
745 pci_unmap_single(pdev, frag->dma, frag->length,
746 PCI_DMA_TODEVICE);
747 frag->dma = 0ULL;
748 for (i = 1; i < buffer->frag_count; i++) {
749 frag++;
750 pci_unmap_page(pdev, frag->dma, frag->length,
751 PCI_DMA_TODEVICE);
752 frag->dma = 0ULL;
753 }
c70001a9
SC		 754 adapter->stats.xmitfinished++;
755 dev_kfree_skb_any(buffer->skb);
756 buffer->skb = NULL;
757 }
758
759 sw_consumer = get_next_index(sw_consumer, tx_ring->num_desc);
4be41e92 760 if (++count >= budget)
c70001a9
SC		 761 break;
762 }
763
764 if (count && netif_running(netdev)) {
765 tx_ring->sw_consumer = sw_consumer;
c70001a9 766 smp_mb();
c70001a9
SC		 767 if (netif_queue_stopped(netdev) && netif_carrier_ok(netdev)) {
768 if (qlcnic_tx_avail(tx_ring) > TX_STOP_THRESH) {
769 netif_wake_queue(netdev);
770 adapter->stats.xmit_on++;
771 }
772 }
773 adapter->tx_timeo_cnt = 0;
774 }
775 /*
776 * If everything is freed up to consumer then check if the ring is full
777 * If the ring is full then check if more needs to be freed and
778 * schedule the call back again.
779 *
780 * This happens when there are 2 CPUs. One could be freeing and the
781 * other filling it. If the ring is full when we get out of here and
782 * the card has already interrupted the host then the host can miss the
783 * interrupt.
784 *
785 * There is still a possible race condition and the host could miss an
786 * interrupt. The card has to take care of this.
787 */
788 hw_consumer = le32_to_cpu(*(tx_ring->hw_consumer));
789 done = (sw_consumer == hw_consumer);
790 spin_unlock(&adapter->tx_clean_lock);
791
792 return done;
793}
794
795static int qlcnic_poll(struct napi_struct *napi, int budget)
796{
4be41e92 797 int tx_complete, work_done;
d17dd0d9
SC		 798 struct qlcnic_host_sds_ring *sds_ring;
799 struct qlcnic_adapter *adapter;
c70001a9 800
d17dd0d9
SC		 801 sds_ring = container_of(napi, struct qlcnic_host_sds_ring, napi);
802 adapter = sds_ring->adapter;
4be41e92
SC		 803 tx_complete = qlcnic_process_cmd_ring(adapter, adapter->tx_ring,
804 budget);
c70001a9 805 work_done = qlcnic_process_rcv_ring(sds_ring, budget);
c70001a9
SC		 806 if ((work_done < budget) && tx_complete) {
807 napi_complete(&sds_ring->napi);
808 if (test_bit(__QLCNIC_DEV_UP, &adapter->state))
809 qlcnic_enable_int(sds_ring);
810 }
811
812 return work_done;
813}
814
815static int qlcnic_rx_poll(struct napi_struct *napi, int budget)
816{
d17dd0d9
SC		 817 struct qlcnic_host_sds_ring *sds_ring;
818 struct qlcnic_adapter *adapter;
c70001a9
SC		 819 int work_done;
820
d17dd0d9
SC		 821 sds_ring = container_of(napi, struct qlcnic_host_sds_ring, napi);
822 adapter = sds_ring->adapter;
823
c70001a9
SC		 824 work_done = qlcnic_process_rcv_ring(sds_ring, budget);
825
826 if (work_done < budget) {
827 napi_complete(&sds_ring->napi);
828 if (test_bit(__QLCNIC_DEV_UP, &adapter->state))
829 qlcnic_enable_int(sds_ring);
830 }
831
832 return work_done;
833}
834
d17dd0d9
SC		 835static void qlcnic_handle_linkevent(struct qlcnic_adapter *adapter,
836 struct qlcnic_fw_msg *msg)
c70001a9
SC		 837{
838 u32 cable_OUI;
d17dd0d9
SC		 839 u16 cable_len, link_speed;
840 u8 link_status, module, duplex, autoneg, lb_status = 0;
c70001a9
SC		 841 struct net_device *netdev = adapter->netdev;
842
79788450 843 adapter->ahw->has_link_events = 1;
c70001a9
SC		 844
845 cable_OUI = msg->body[1] & 0xffffffff;
846 cable_len = (msg->body[1] >> 32) & 0xffff;
847 link_speed = (msg->body[1] >> 48) & 0xffff;
848
849 link_status = msg->body[2] & 0xff;
850 duplex = (msg->body[2] >> 16) & 0xff;
851 autoneg = (msg->body[2] >> 24) & 0xff;
852 lb_status = (msg->body[2] >> 32) & 0x3;
853
854 module = (msg->body[2] >> 8) & 0xff;
855 if (module == LINKEVENT_MODULE_TWINAX_UNSUPPORTED_CABLE)
d17dd0d9
SC		 856 dev_info(&netdev->dev,
857 "unsupported cable: OUI 0x%x, length %d\n",
858 cable_OUI, cable_len);
c70001a9
SC		 859 else if (module == LINKEVENT_MODULE_TWINAX_UNSUPPORTED_CABLELEN)
860 dev_info(&netdev->dev, "unsupported cable length %d\n",
d17dd0d9 861 cable_len);
c70001a9
SC		 862
863 if (!link_status && (lb_status == QLCNIC_ILB_MODE ||
864 lb_status == QLCNIC_ELB_MODE))
865 adapter->ahw->loopback_state |= QLCNIC_LINKEVENT;
866
867 qlcnic_advert_link_change(adapter, link_status);
868
869 if (duplex == LINKEVENT_FULL_DUPLEX)
79788450 870 adapter->ahw->link_duplex = DUPLEX_FULL;
c70001a9 871 else
79788450 872 adapter->ahw->link_duplex = DUPLEX_HALF;
c70001a9 873
79788450
SC		 874 adapter->ahw->module_type = module;
875 adapter->ahw->link_autoneg = autoneg;
c70001a9
SC		 876
877 if (link_status) {
79788450 878 adapter->ahw->link_speed = link_speed;
c70001a9 879 } else {
79788450
SC		 880 adapter->ahw->link_speed = SPEED_UNKNOWN;
881 adapter->ahw->link_duplex = DUPLEX_UNKNOWN;
c70001a9
SC		 882 }
883}
884
d17dd0d9
SC		 885static void qlcnic_handle_fw_message(int desc_cnt, int index,
886 struct qlcnic_host_sds_ring *sds_ring)
c70001a9
SC		 887{
888 struct qlcnic_fw_msg msg;
889 struct status_desc *desc;
890 struct qlcnic_adapter *adapter;
891 struct device *dev;
892 int i = 0, opcode, ret;
893
894 while (desc_cnt > 0 && i < 8) {
895 desc = &sds_ring->desc_head[index];
896 msg.words[i++] = le64_to_cpu(desc->status_desc_data[0]);
897 msg.words[i++] = le64_to_cpu(desc->status_desc_data[1]);
898
899 index = get_next_index(index, sds_ring->num_desc);
900 desc_cnt--;
901 }
902
903 adapter = sds_ring->adapter;
904 dev = &adapter->pdev->dev;
905 opcode = qlcnic_get_nic_msg_opcode(msg.body[0]);
906
907 switch (opcode) {
908 case QLCNIC_C2H_OPCODE_GET_LINKEVENT_RESPONSE:
909 qlcnic_handle_linkevent(adapter, &msg);
910 break;
911 case QLCNIC_C2H_OPCODE_CONFIG_LOOPBACK:
912 ret = (u32)(msg.body[1]);
913 switch (ret) {
914 case 0:
915 adapter->ahw->loopback_state |= QLCNIC_LB_RESPONSE;
916 break;
917 case 1:
918 dev_info(dev, "loopback already in progress\n");
79788450 919 adapter->ahw->diag_cnt = -QLCNIC_TEST_IN_PROGRESS;
c70001a9
SC		 920 break;
921 case 2:
922 dev_info(dev, "loopback cable is not connected\n");
79788450 923 adapter->ahw->diag_cnt = -QLCNIC_LB_CABLE_NOT_CONN;
c70001a9
SC		 924 break;
925 default:
d17dd0d9
SC		 926 dev_info(dev,
927 "loopback configure request failed, err %x\n",
928 ret);
79788450 929 adapter->ahw->diag_cnt = -QLCNIC_UNDEFINED_ERROR;
c70001a9
SC		 930 break;
931 }
932 break;
933 default:
934 break;
935 }
936}
937
4be41e92
SC		 938struct sk_buff *qlcnic_process_rxbuf(struct qlcnic_adapter *adapter,
939 struct qlcnic_host_rds_ring *ring,
940 u16 index, u16 cksum)
c70001a9
SC		 941{
942 struct qlcnic_rx_buffer *buffer;
943 struct sk_buff *skb;
944
4be41e92 945 buffer = &ring->rx_buf_arr[index];
c70001a9
SC		 946 if (unlikely(buffer->skb == NULL)) {
947 WARN_ON(1);
948 return NULL;
949 }
950
4be41e92 951 pci_unmap_single(adapter->pdev, buffer->dma, ring->dma_size,
d17dd0d9 952 PCI_DMA_FROMDEVICE);
c70001a9
SC		 953
954 skb = buffer->skb;
c70001a9 955 if (likely((adapter->netdev->features & NETIF_F_RXCSUM) &&
d17dd0d9 956 (cksum == STATUS_CKSUM_OK || cksum == STATUS_CKSUM_LOOP))) {
c70001a9
SC		 957 adapter->stats.csummed++;
958 skb->ip_summed = CHECKSUM_UNNECESSARY;
959 } else {
960 skb_checksum_none_assert(skb);
961 }
962
4be41e92 963
c70001a9
SC		 964 buffer->skb = NULL;
965
966 return skb;
967}
968
d17dd0d9
SC		 969static inline int qlcnic_check_rx_tagging(struct qlcnic_adapter *adapter,
970 struct sk_buff *skb, u16 *vlan_tag)
c70001a9
SC		 971{
972 struct ethhdr *eth_hdr;
973
974 if (!__vlan_get_tag(skb, vlan_tag)) {
d17dd0d9 975 eth_hdr = (struct ethhdr *)skb->data;
c70001a9
SC		 976 memmove(skb->data + VLAN_HLEN, eth_hdr, ETH_ALEN * 2);
977 skb_pull(skb, VLAN_HLEN);
978 }
979 if (!adapter->pvid)
980 return 0;
981
982 if (*vlan_tag == adapter->pvid) {
983 /* Outer vlan tag. Packet should follow non-vlan path */
984 *vlan_tag = 0xffff;
985 return 0;
986 }
987 if (adapter->flags & QLCNIC_TAGGING_ENABLED)
988 return 0;
989
990 return -EINVAL;
991}
992
993static struct qlcnic_rx_buffer *
994qlcnic_process_rcv(struct qlcnic_adapter *adapter,
d17dd0d9
SC		 995 struct qlcnic_host_sds_ring *sds_ring, int ring,
996 u64 sts_data0)
c70001a9
SC		 997{
998 struct net_device *netdev = adapter->netdev;
999 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1000 struct qlcnic_rx_buffer *buffer;
1001 struct sk_buff *skb;
1002 struct qlcnic_host_rds_ring *rds_ring;
53643a75
SS		 1003 int index, length, cksum, pkt_offset, is_lb_pkt;
1004 u16 vid = 0xffff, t_vid;
c70001a9
SC		 1005
1006 if (unlikely(ring >= adapter->max_rds_rings))
1007 return NULL;
1008
1009 rds_ring = &recv_ctx->rds_rings[ring];
1010
1011 index = qlcnic_get_sts_refhandle(sts_data0);
1012 if (unlikely(index >= rds_ring->num_desc))
1013 return NULL;
1014
1015 buffer = &rds_ring->rx_buf_arr[index];
c70001a9
SC		 1016 length = qlcnic_get_sts_totallength(sts_data0);
1017 cksum = qlcnic_get_sts_status(sts_data0);
1018 pkt_offset = qlcnic_get_sts_pkt_offset(sts_data0);
1019
1020 skb = qlcnic_process_rxbuf(adapter, rds_ring, index, cksum);
1021 if (!skb)
1022 return buffer;
1023
53643a75
SS		 1024 if (adapter->drv_mac_learn &&
1025 (adapter->flags & QLCNIC_ESWITCH_ENABLED)) {
1026 t_vid = 0;
1027 is_lb_pkt = qlcnic_82xx_is_lb_pkt(sts_data0);
1028 qlcnic_add_lb_filter(adapter, skb, is_lb_pkt,
1029 cpu_to_le16(t_vid));
1030 }
1031
c70001a9
SC		 1032 if (length > rds_ring->skb_size)
1033 skb_put(skb, rds_ring->skb_size);
1034 else
1035 skb_put(skb, length);
1036
1037 if (pkt_offset)
1038 skb_pull(skb, pkt_offset);
1039
1040 if (unlikely(qlcnic_check_rx_tagging(adapter, skb, &vid))) {
1041 adapter->stats.rxdropped++;
1042 dev_kfree_skb(skb);
1043 return buffer;
1044 }
1045
1046 skb->protocol = eth_type_trans(skb, netdev);
1047
1048 if (vid != 0xffff)
1049 __vlan_hwaccel_put_tag(skb, vid);
1050
1051 napi_gro_receive(&sds_ring->napi, skb);
1052
1053 adapter->stats.rx_pkts++;
1054 adapter->stats.rxbytes += length;
1055
1056 return buffer;
1057}
1058
1059#define QLC_TCP_HDR_SIZE 20
1060#define QLC_TCP_TS_OPTION_SIZE 12
1061#define QLC_TCP_TS_HDR_SIZE (QLC_TCP_HDR_SIZE + QLC_TCP_TS_OPTION_SIZE)
1062
1063static struct qlcnic_rx_buffer *
1064qlcnic_process_lro(struct qlcnic_adapter *adapter,
d17dd0d9 1065 int ring, u64 sts_data0, u64 sts_data1)
c70001a9
SC		 1066{
1067 struct net_device *netdev = adapter->netdev;
1068 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1069 struct qlcnic_rx_buffer *buffer;
1070 struct sk_buff *skb;
1071 struct qlcnic_host_rds_ring *rds_ring;
1072 struct iphdr *iph;
776e7bde 1073 struct ipv6hdr *ipv6h;
c70001a9
SC		 1074 struct tcphdr *th;
1075 bool push, timestamp;
53643a75
SS		 1076 int index, l2_hdr_offset, l4_hdr_offset, is_lb_pkt;
1077 u16 lro_length, length, data_offset, t_vid, vid = 0xffff;
c70001a9 1078 u32 seq_number;
c70001a9
SC		 1079
1080 if (unlikely(ring > adapter->max_rds_rings))
1081 return NULL;
1082
1083 rds_ring = &recv_ctx->rds_rings[ring];
1084
1085 index = qlcnic_get_lro_sts_refhandle(sts_data0);
1086 if (unlikely(index > rds_ring->num_desc))
1087 return NULL;
1088
1089 buffer = &rds_ring->rx_buf_arr[index];
1090
1091 timestamp = qlcnic_get_lro_sts_timestamp(sts_data0);
1092 lro_length = qlcnic_get_lro_sts_length(sts_data0);
1093 l2_hdr_offset = qlcnic_get_lro_sts_l2_hdr_offset(sts_data0);
1094 l4_hdr_offset = qlcnic_get_lro_sts_l4_hdr_offset(sts_data0);
1095 push = qlcnic_get_lro_sts_push_flag(sts_data0);
1096 seq_number = qlcnic_get_lro_sts_seq_number(sts_data1);
1097
1098 skb = qlcnic_process_rxbuf(adapter, rds_ring, index, STATUS_CKSUM_OK);
1099 if (!skb)
1100 return buffer;
1101
53643a75
SS		 1102 if (adapter->drv_mac_learn &&
1103 (adapter->flags & QLCNIC_ESWITCH_ENABLED)) {
1104 t_vid = 0;
1105 is_lb_pkt = qlcnic_82xx_is_lb_pkt(sts_data0);
1106 qlcnic_add_lb_filter(adapter, skb, is_lb_pkt,
1107 cpu_to_le16(t_vid));
1108 }
1109
c70001a9
SC		 1110 if (timestamp)
1111 data_offset = l4_hdr_offset + QLC_TCP_TS_HDR_SIZE;
1112 else
1113 data_offset = l4_hdr_offset + QLC_TCP_HDR_SIZE;
1114
1115 skb_put(skb, lro_length + data_offset);
c70001a9
SC		 1116 skb_pull(skb, l2_hdr_offset);
1117
1118 if (unlikely(qlcnic_check_rx_tagging(adapter, skb, &vid))) {
1119 adapter->stats.rxdropped++;
1120 dev_kfree_skb(skb);
1121 return buffer;
1122 }
1123
1124 skb->protocol = eth_type_trans(skb, netdev);
776e7bde 1125
069048f1 1126 if (ntohs(skb->protocol) == ETH_P_IPV6) {
776e7bde
SS		 1127 ipv6h = (struct ipv6hdr *)skb->data;
1128 th = (struct tcphdr *)(skb->data + sizeof(struct ipv6hdr));
1129 length = (th->doff << 2) + lro_length;
1130 ipv6h->payload_len = htons(length);
1131 } else {
1132 iph = (struct iphdr *)skb->data;
1133 th = (struct tcphdr *)(skb->data + (iph->ihl << 2));
1134 length = (iph->ihl << 2) + (th->doff << 2) + lro_length;
1135 iph->tot_len = htons(length);
1136 iph->check = 0;
1137 iph->check = ip_fast_csum((unsigned char *)iph, iph->ihl);
1138 }
1139
c70001a9
SC		 1140 th->psh = push;
1141 th->seq = htonl(seq_number);
c70001a9
SC		 1142 length = skb->len;
1143
bd69ba79 1144 if (adapter->flags & QLCNIC_FW_LRO_MSS_CAP) {
c70001a9 1145 skb_shinfo(skb)->gso_size = qlcnic_get_lro_sts_mss(sts_data1);
bd69ba79
MT		 1146 if (skb->protocol == htons(ETH_P_IPV6))
1147 skb_shinfo(skb)->gso_type = SKB_GSO_TCPV6;
1148 else
1149 skb_shinfo(skb)->gso_type = SKB_GSO_TCPV4;
1150 }
c70001a9
SC		 1151
1152 if (vid != 0xffff)
1153 __vlan_hwaccel_put_tag(skb, vid);
1154 netif_receive_skb(skb);
1155
1156 adapter->stats.lro_pkts++;
1157 adapter->stats.lrobytes += length;
1158
1159 return buffer;
1160}
1161
d17dd0d9 1162int qlcnic_process_rcv_ring(struct qlcnic_host_sds_ring *sds_ring, int max)
c70001a9 1163{
d17dd0d9 1164 struct qlcnic_host_rds_ring *rds_ring;
c70001a9
SC		 1165 struct qlcnic_adapter *adapter = sds_ring->adapter;
1166 struct list_head *cur;
1167 struct status_desc *desc;
1168 struct qlcnic_rx_buffer *rxbuf;
4be41e92 1169 int opcode, desc_cnt, count = 0;
c70001a9 1170 u64 sts_data0, sts_data1;
4be41e92 1171 u8 ring;
c70001a9
SC		 1172 u32 consumer = sds_ring->consumer;
1173
1174 while (count < max) {
1175 desc = &sds_ring->desc_head[consumer];
1176 sts_data0 = le64_to_cpu(desc->status_desc_data[0]);
1177
1178 if (!(sts_data0 & STATUS_OWNER_HOST))
1179 break;
1180
1181 desc_cnt = qlcnic_get_sts_desc_cnt(sts_data0);
1182 opcode = qlcnic_get_sts_opcode(sts_data0);
c70001a9
SC		 1183 switch (opcode) {
1184 case QLCNIC_RXPKT_DESC:
1185 case QLCNIC_OLD_RXPKT_DESC:
1186 case QLCNIC_SYN_OFFLOAD:
1187 ring = qlcnic_get_sts_type(sts_data0);
d17dd0d9
SC		 1188 rxbuf = qlcnic_process_rcv(adapter, sds_ring, ring,
1189 sts_data0);
c70001a9
SC		 1190 break;
1191 case QLCNIC_LRO_DESC:
1192 ring = qlcnic_get_lro_sts_type(sts_data0);
1193 sts_data1 = le64_to_cpu(desc->status_desc_data[1]);
1194 rxbuf = qlcnic_process_lro(adapter, ring, sts_data0,
1195 sts_data1);
1196 break;
1197 case QLCNIC_RESPONSE_DESC:
1198 qlcnic_handle_fw_message(desc_cnt, consumer, sds_ring);
1199 default:
1200 goto skip;
1201 }
c70001a9
SC		 1202 WARN_ON(desc_cnt > 1);
1203
1204 if (likely(rxbuf))
1205 list_add_tail(&rxbuf->list, &sds_ring->free_list[ring]);
1206 else
1207 adapter->stats.null_rxbuf++;
c70001a9
SC		 1208skip:
1209 for (; desc_cnt > 0; desc_cnt--) {
1210 desc = &sds_ring->desc_head[consumer];
4be41e92 1211 desc->status_desc_data[0] = QLCNIC_DESC_OWNER_FW;
c70001a9
SC		 1212 consumer = get_next_index(consumer, sds_ring->num_desc);
1213 }
1214 count++;
1215 }
1216
1217 for (ring = 0; ring < adapter->max_rds_rings; ring++) {
d17dd0d9 1218 rds_ring = &adapter->recv_ctx->rds_rings[ring];
c70001a9
SC		 1219 if (!list_empty(&sds_ring->free_list[ring])) {
1220 list_for_each(cur, &sds_ring->free_list[ring]) {
d17dd0d9
SC		 1221 rxbuf = list_entry(cur, struct qlcnic_rx_buffer,
1222 list);
c70001a9
SC		 1223 qlcnic_alloc_rx_skb(adapter, rds_ring, rxbuf);
1224 }
1225 spin_lock(&rds_ring->lock);
1226 list_splice_tail_init(&sds_ring->free_list[ring],
d17dd0d9 1227 &rds_ring->free_list);
c70001a9
SC		 1228 spin_unlock(&rds_ring->lock);
1229 }
1230
4be41e92 1231 qlcnic_post_rx_buffers_nodb(adapter, rds_ring, ring);
c70001a9
SC		 1232 }
1233
1234 if (count) {
1235 sds_ring->consumer = consumer;
1236 writel(consumer, sds_ring->crb_sts_consumer);
1237 }
1238
1239 return count;
1240}
1241
d17dd0d9 1242void qlcnic_post_rx_buffers(struct qlcnic_adapter *adapter,
4be41e92 1243 struct qlcnic_host_rds_ring *rds_ring, u8 ring_id)
c70001a9
SC		 1244{
1245 struct rcv_desc *pdesc;
1246 struct qlcnic_rx_buffer *buffer;
1247 int count = 0;
4be41e92 1248 u32 producer, handle;
c70001a9
SC		 1249 struct list_head *head;
1250
1251 producer = rds_ring->producer;
c70001a9 1252 head = &rds_ring->free_list;
d17dd0d9 1253
c70001a9
SC		 1254 while (!list_empty(head)) {
1255
1256 buffer = list_entry(head->next, struct qlcnic_rx_buffer, list);
1257
1258 if (!buffer->skb) {
1259 if (qlcnic_alloc_rx_skb(adapter, rds_ring, buffer))
1260 break;
1261 }
1262
1263 count++;
1264 list_del(&buffer->list);
1265
1266 /* make a rcv descriptor */
1267 pdesc = &rds_ring->desc_head[producer];
1268 pdesc->addr_buffer = cpu_to_le64(buffer->dma);
4be41e92
SC		 1269 handle = qlcnic_get_ref_handle(adapter, buffer->ref_handle,
1270 ring_id);
1271 pdesc->reference_handle = cpu_to_le16(handle);
c70001a9 1272 pdesc->buffer_length = cpu_to_le32(rds_ring->dma_size);
c70001a9
SC		 1273 producer = get_next_index(producer, rds_ring->num_desc);
1274 }
1275
1276 if (count) {
1277 rds_ring->producer = producer;
1278 writel((producer-1) & (rds_ring->num_desc-1),
d17dd0d9 1279 rds_ring->crb_rcv_producer);
c70001a9
SC		 1280 }
1281}
1282
1283static void dump_skb(struct sk_buff *skb, struct qlcnic_adapter *adapter)
1284{
1285 int i;
1286 unsigned char *data = skb->data;
1287
d17dd0d9 1288 pr_info(KERN_INFO "\n");
c70001a9
SC		 1289 for (i = 0; i < skb->len; i++) {
1290 QLCDB(adapter, DRV, "%02x ", data[i]);
1291 if ((i & 0x0f) == 8)
d17dd0d9 1292 pr_info(KERN_INFO "\n");
c70001a9
SC		 1293 }
1294}
1295
1296static void qlcnic_process_rcv_diag(struct qlcnic_adapter *adapter, int ring,
1297 u64 sts_data0)
1298{
1299 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1300 struct sk_buff *skb;
1301 struct qlcnic_host_rds_ring *rds_ring;
1302 int index, length, cksum, pkt_offset;
1303
1304 if (unlikely(ring >= adapter->max_rds_rings))
1305 return;
1306
1307 rds_ring = &recv_ctx->rds_rings[ring];
1308
1309 index = qlcnic_get_sts_refhandle(sts_data0);
1310 length = qlcnic_get_sts_totallength(sts_data0);
1311 if (unlikely(index >= rds_ring->num_desc))
1312 return;
1313
1314 cksum = qlcnic_get_sts_status(sts_data0);
1315 pkt_offset = qlcnic_get_sts_pkt_offset(sts_data0);
1316
1317 skb = qlcnic_process_rxbuf(adapter, rds_ring, index, cksum);
1318 if (!skb)
1319 return;
1320
1321 if (length > rds_ring->skb_size)
1322 skb_put(skb, rds_ring->skb_size);
1323 else
1324 skb_put(skb, length);
1325
1326 if (pkt_offset)
1327 skb_pull(skb, pkt_offset);
1328
1329 if (!qlcnic_check_loopback_buff(skb->data, adapter->mac_addr))
79788450 1330 adapter->ahw->diag_cnt++;
c70001a9
SC		 1331 else
1332 dump_skb(skb, adapter);
1333
1334 dev_kfree_skb_any(skb);
1335 adapter->stats.rx_pkts++;
1336 adapter->stats.rxbytes += length;
1337
1338 return;
1339}
1340
7e2cf4fe 1341void qlcnic_82xx_process_rcv_ring_diag(struct qlcnic_host_sds_ring *sds_ring)
c70001a9
SC		 1342{
1343 struct qlcnic_adapter *adapter = sds_ring->adapter;
1344 struct status_desc *desc;
1345 u64 sts_data0;
1346 int ring, opcode, desc_cnt;
1347
1348 u32 consumer = sds_ring->consumer;
1349
1350 desc = &sds_ring->desc_head[consumer];
1351 sts_data0 = le64_to_cpu(desc->status_desc_data[0]);
1352
1353 if (!(sts_data0 & STATUS_OWNER_HOST))
1354 return;
1355
1356 desc_cnt = qlcnic_get_sts_desc_cnt(sts_data0);
1357 opcode = qlcnic_get_sts_opcode(sts_data0);
1358 switch (opcode) {
1359 case QLCNIC_RESPONSE_DESC:
1360 qlcnic_handle_fw_message(desc_cnt, consumer, sds_ring);
1361 break;
1362 default:
1363 ring = qlcnic_get_sts_type(sts_data0);
1364 qlcnic_process_rcv_diag(adapter, ring, sts_data0);
1365 break;
1366 }
1367
1368 for (; desc_cnt > 0; desc_cnt--) {
1369 desc = &sds_ring->desc_head[consumer];
1370 desc->status_desc_data[0] = cpu_to_le64(STATUS_OWNER_PHANTOM);
1371 consumer = get_next_index(consumer, sds_ring->num_desc);
1372 }
1373
1374 sds_ring->consumer = consumer;
1375 writel(consumer, sds_ring->crb_sts_consumer);
1376}
1377
7e2cf4fe
SC		 1378int qlcnic_82xx_napi_add(struct qlcnic_adapter *adapter,
1379 struct net_device *netdev)
c70001a9 1380{
d17dd0d9 1381 int ring, max_sds_rings;
c70001a9
SC		 1382 struct qlcnic_host_sds_ring *sds_ring;
1383 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1384
1385 if (qlcnic_alloc_sds_rings(recv_ctx, adapter->max_sds_rings))
1386 return -ENOMEM;
1387
d17dd0d9
SC		 1388 max_sds_rings = adapter->max_sds_rings;
1389
c70001a9
SC		 1390 for (ring = 0; ring < adapter->max_sds_rings; ring++) {
1391 sds_ring = &recv_ctx->sds_rings[ring];
4be41e92 1392 if (ring == adapter->max_sds_rings - 1)
c70001a9 1393 netif_napi_add(netdev, &sds_ring->napi, qlcnic_poll,
d17dd0d9 1394 QLCNIC_NETDEV_WEIGHT / max_sds_rings);
c70001a9 1395 else
d17dd0d9
SC		 1396 netif_napi_add(netdev, &sds_ring->napi, qlcnic_rx_poll,
1397 QLCNIC_NETDEV_WEIGHT*2);
c70001a9
SC		 1398 }
1399
4be41e92
SC		 1400 if (qlcnic_alloc_tx_rings(adapter, netdev)) {
1401 qlcnic_free_sds_rings(recv_ctx);
1402 return -ENOMEM;
1403 }
1404
c70001a9
SC		 1405 return 0;
1406}
1407
4be41e92 1408void qlcnic_82xx_napi_del(struct qlcnic_adapter *adapter)
c70001a9
SC		 1409{
1410 int ring;
1411 struct qlcnic_host_sds_ring *sds_ring;
1412 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1413
1414 for (ring = 0; ring < adapter->max_sds_rings; ring++) {
1415 sds_ring = &recv_ctx->sds_rings[ring];
1416 netif_napi_del(&sds_ring->napi);
1417 }
1418
1419 qlcnic_free_sds_rings(adapter->recv_ctx);
4be41e92 1420 qlcnic_free_tx_rings(adapter);
c70001a9
SC		 1421}
1422
7e2cf4fe 1423void qlcnic_82xx_napi_enable(struct qlcnic_adapter *adapter)
c70001a9
SC		 1424{
1425 int ring;
1426 struct qlcnic_host_sds_ring *sds_ring;
1427 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1428
1429 if (adapter->is_up != QLCNIC_ADAPTER_UP_MAGIC)
1430 return;
1431
1432 for (ring = 0; ring < adapter->max_sds_rings; ring++) {
1433 sds_ring = &recv_ctx->sds_rings[ring];
1434 napi_enable(&sds_ring->napi);
1435 qlcnic_enable_int(sds_ring);
1436 }
1437}
1438
7e2cf4fe 1439void qlcnic_82xx_napi_disable(struct qlcnic_adapter *adapter)
c70001a9
SC		 1440{
1441 int ring;
1442 struct qlcnic_host_sds_ring *sds_ring;
1443 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1444
1445 if (adapter->is_up != QLCNIC_ADAPTER_UP_MAGIC)
1446 return;
1447
1448 for (ring = 0; ring < adapter->max_sds_rings; ring++) {
1449 sds_ring = &recv_ctx->sds_rings[ring];
1450 qlcnic_disable_int(sds_ring);
1451 napi_synchronize(&sds_ring->napi);
1452 napi_disable(&sds_ring->napi);
1453 }
1454}
4be41e92 1455
53643a75
SS		 1456#define QLC_83XX_NORMAL_LB_PKT (1ULL << 36)
1457#define QLC_83XX_LRO_LB_PKT (1ULL << 46)
1458
1459static inline int qlcnic_83xx_is_lb_pkt(u64 sts_data, int lro_pkt)
1460{
1461 if (lro_pkt)
1462 return (sts_data & QLC_83XX_LRO_LB_PKT) ? 1 : 0;
1463 else
1464 return (sts_data & QLC_83XX_NORMAL_LB_PKT) ? 1 : 0;
1465}
1466
4be41e92
SC		 1467static struct qlcnic_rx_buffer *
1468qlcnic_83xx_process_rcv(struct qlcnic_adapter *adapter,
1469 struct qlcnic_host_sds_ring *sds_ring,
1470 u8 ring, u64 sts_data[])
1471{
1472 struct net_device *netdev = adapter->netdev;
1473 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1474 struct qlcnic_rx_buffer *buffer;
1475 struct sk_buff *skb;
1476 struct qlcnic_host_rds_ring *rds_ring;
53643a75
SS		 1477 int index, length, cksum, is_lb_pkt;
1478 u16 vid = 0xffff, t_vid;
4be41e92
SC		 1479
1480 if (unlikely(ring >= adapter->max_rds_rings))
1481 return NULL;
1482
1483 rds_ring = &recv_ctx->rds_rings[ring];
1484
1485 index = qlcnic_83xx_hndl(sts_data[0]);
1486 if (unlikely(index >= rds_ring->num_desc))
1487 return NULL;
1488
1489 buffer = &rds_ring->rx_buf_arr[index];
1490 length = qlcnic_83xx_pktln(sts_data[0]);
1491 cksum = qlcnic_83xx_csum_status(sts_data[1]);
1492 skb = qlcnic_process_rxbuf(adapter, rds_ring, index, cksum);
1493 if (!skb)
1494 return buffer;
1495
53643a75
SS		 1496 if (adapter->drv_mac_learn &&
1497 (adapter->flags & QLCNIC_ESWITCH_ENABLED)) {
1498 t_vid = 0;
1499 is_lb_pkt = qlcnic_83xx_is_lb_pkt(sts_data[1], 0);
1500 qlcnic_add_lb_filter(adapter, skb, is_lb_pkt,
1501 cpu_to_le16(t_vid));
1502 }
1503
4be41e92
SC		 1504 if (length > rds_ring->skb_size)
1505 skb_put(skb, rds_ring->skb_size);
1506 else
1507 skb_put(skb, length);
1508
1509 if (unlikely(qlcnic_check_rx_tagging(adapter, skb, &vid))) {
1510 adapter->stats.rxdropped++;
1511 dev_kfree_skb(skb);
1512 return buffer;
1513 }
1514
1515 skb->protocol = eth_type_trans(skb, netdev);
1516
1517 if (vid != 0xffff)
1518 __vlan_hwaccel_put_tag(skb, vid);
1519
1520 napi_gro_receive(&sds_ring->napi, skb);
1521
1522 adapter->stats.rx_pkts++;
1523 adapter->stats.rxbytes += length;
1524
1525 return buffer;
1526}
1527
1528static struct qlcnic_rx_buffer *
1529qlcnic_83xx_process_lro(struct qlcnic_adapter *adapter,
1530 u8 ring, u64 sts_data[])
1531{
1532 struct net_device *netdev = adapter->netdev;
1533 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1534 struct qlcnic_rx_buffer *buffer;
1535 struct sk_buff *skb;
1536 struct qlcnic_host_rds_ring *rds_ring;
1537 struct iphdr *iph;
1538 struct ipv6hdr *ipv6h;
1539 struct tcphdr *th;
1540 bool push;
1541 int l2_hdr_offset, l4_hdr_offset;
53643a75 1542 int index, is_lb_pkt;
99e85879 1543 u16 lro_length, length, data_offset, gso_size;
53643a75 1544 u16 vid = 0xffff, t_vid;
4be41e92
SC		 1545
1546 if (unlikely(ring > adapter->max_rds_rings))
1547 return NULL;
1548
1549 rds_ring = &recv_ctx->rds_rings[ring];
1550
1551 index = qlcnic_83xx_hndl(sts_data[0]);
1552 if (unlikely(index > rds_ring->num_desc))
1553 return NULL;
1554
1555 buffer = &rds_ring->rx_buf_arr[index];
1556
1557 lro_length = qlcnic_83xx_lro_pktln(sts_data[0]);
1558 l2_hdr_offset = qlcnic_83xx_l2_hdr_off(sts_data[1]);
1559 l4_hdr_offset = qlcnic_83xx_l4_hdr_off(sts_data[1]);
1560 push = qlcnic_83xx_is_psh_bit(sts_data[1]);
1561
1562 skb = qlcnic_process_rxbuf(adapter, rds_ring, index, STATUS_CKSUM_OK);
1563 if (!skb)
1564 return buffer;
53643a75
SS		 1565
1566 if (adapter->drv_mac_learn &&
1567 (adapter->flags & QLCNIC_ESWITCH_ENABLED)) {
1568 t_vid = 0;
1569 is_lb_pkt = qlcnic_83xx_is_lb_pkt(sts_data[1], 1);
1570 qlcnic_add_lb_filter(adapter, skb, is_lb_pkt,
1571 cpu_to_le16(t_vid));
1572 }
4be41e92
SC		 1573 if (qlcnic_83xx_is_tstamp(sts_data[1]))
1574 data_offset = l4_hdr_offset + QLCNIC_TCP_TS_HDR_SIZE;
1575 else
1576 data_offset = l4_hdr_offset + QLCNIC_TCP_HDR_SIZE;
1577
1578 skb_put(skb, lro_length + data_offset);
1579 skb_pull(skb, l2_hdr_offset);
1580
1581 if (unlikely(qlcnic_check_rx_tagging(adapter, skb, &vid))) {
1582 adapter->stats.rxdropped++;
1583 dev_kfree_skb(skb);
1584 return buffer;
1585 }
1586
1587 skb->protocol = eth_type_trans(skb, netdev);
1588 if (ntohs(skb->protocol) == ETH_P_IPV6) {
1589 ipv6h = (struct ipv6hdr *)skb->data;
1590 th = (struct tcphdr *)(skb->data + sizeof(struct ipv6hdr));
1591
1592 length = (th->doff << 2) + lro_length;
1593 ipv6h->payload_len = htons(length);
1594 } else {
1595 iph = (struct iphdr *)skb->data;
1596 th = (struct tcphdr *)(skb->data + (iph->ihl << 2));
1597 length = (iph->ihl << 2) + (th->doff << 2) + lro_length;
1598 iph->tot_len = htons(length);
1599 iph->check = 0;
1600 iph->check = ip_fast_csum((unsigned char *)iph, iph->ihl);
1601 }
1602
1603 th->psh = push;
1604 length = skb->len;
1605
99e85879
SS		 1606 if (adapter->flags & QLCNIC_FW_LRO_MSS_CAP) {
1607 gso_size = qlcnic_83xx_get_lro_sts_mss(sts_data[0]);
1608 skb_shinfo(skb)->gso_size = gso_size;
1609 if (skb->protocol == htons(ETH_P_IPV6))
1610 skb_shinfo(skb)->gso_type = SKB_GSO_TCPV6;
1611 else
1612 skb_shinfo(skb)->gso_type = SKB_GSO_TCPV4;
1613 }
1614
4be41e92
SC		 1615 if (vid != 0xffff)
1616 __vlan_hwaccel_put_tag(skb, vid);
1617
1618 netif_receive_skb(skb);
1619
1620 adapter->stats.lro_pkts++;
1621 adapter->stats.lrobytes += length;
1622 return buffer;
1623}
1624
1625static int qlcnic_83xx_process_rcv_ring(struct qlcnic_host_sds_ring *sds_ring,
1626 int max)
1627{
1628 struct qlcnic_host_rds_ring *rds_ring;
1629 struct qlcnic_adapter *adapter = sds_ring->adapter;
1630 struct list_head *cur;
1631 struct status_desc *desc;
1632 struct qlcnic_rx_buffer *rxbuf = NULL;
1633 u8 ring;
1634 u64 sts_data[2];
1635 int count = 0, opcode;
1636 u32 consumer = sds_ring->consumer;
1637
1638 while (count < max) {
1639 desc = &sds_ring->desc_head[consumer];
1640 sts_data[1] = le64_to_cpu(desc->status_desc_data[1]);
1641 opcode = qlcnic_83xx_opcode(sts_data[1]);
1642 if (!opcode)
1643 break;
1644 sts_data[0] = le64_to_cpu(desc->status_desc_data[0]);
1645 ring = QLCNIC_FETCH_RING_ID(sts_data[0]);
1646
1647 switch (opcode) {
1648 case QLC_83XX_REG_DESC:
1649 rxbuf = qlcnic_83xx_process_rcv(adapter, sds_ring,
1650 ring, sts_data);
1651 break;
1652 case QLC_83XX_LRO_DESC:
1653 rxbuf = qlcnic_83xx_process_lro(adapter, ring,
1654 sts_data);
1655 break;
1656 default:
1657 dev_info(&adapter->pdev->dev,
1658 "Unkonwn opcode: 0x%x\n", opcode);
1659 goto skip;
1660 }
1661
1662 if (likely(rxbuf))
1663 list_add_tail(&rxbuf->list, &sds_ring->free_list[ring]);
1664 else
1665 adapter->stats.null_rxbuf++;
1666skip:
1667 desc = &sds_ring->desc_head[consumer];
1668 /* Reset the descriptor */
1669 desc->status_desc_data[1] = 0;
1670 consumer = get_next_index(consumer, sds_ring->num_desc);
1671 count++;
1672 }
1673 for (ring = 0; ring < adapter->max_rds_rings; ring++) {
1674 rds_ring = &adapter->recv_ctx->rds_rings[ring];
1675 if (!list_empty(&sds_ring->free_list[ring])) {
1676 list_for_each(cur, &sds_ring->free_list[ring]) {
1677 rxbuf = list_entry(cur, struct qlcnic_rx_buffer,
1678 list);
1679 qlcnic_alloc_rx_skb(adapter, rds_ring, rxbuf);
1680 }
1681 spin_lock(&rds_ring->lock);
1682 list_splice_tail_init(&sds_ring->free_list[ring],
1683 &rds_ring->free_list);
1684 spin_unlock(&rds_ring->lock);
1685 }
1686 qlcnic_post_rx_buffers_nodb(adapter, rds_ring, ring);
1687 }
1688 if (count) {
1689 sds_ring->consumer = consumer;
1690 writel(consumer, sds_ring->crb_sts_consumer);
1691 }
1692 return count;
1693}
1694
1695static int qlcnic_83xx_poll(struct napi_struct *napi, int budget)
1696{
1697 int tx_complete;
1698 int work_done;
1699 struct qlcnic_host_sds_ring *sds_ring;
1700 struct qlcnic_adapter *adapter;
1701 struct qlcnic_host_tx_ring *tx_ring;
1702
1703 sds_ring = container_of(napi, struct qlcnic_host_sds_ring, napi);
1704 adapter = sds_ring->adapter;
1705 /* tx ring count = 1 */
1706 tx_ring = adapter->tx_ring;
1707
4be41e92
SC		 1708 tx_complete = qlcnic_process_cmd_ring(adapter, tx_ring, budget);
1709 work_done = qlcnic_83xx_process_rcv_ring(sds_ring, budget);
1710 if ((work_done < budget) && tx_complete) {
1711 napi_complete(&sds_ring->napi);
ac166700 1712 qlcnic_83xx_enable_intr(adapter, sds_ring);
4be41e92
SC		 1713 }
1714
1715 return work_done;
1716}
1717
1718static int qlcnic_83xx_msix_tx_poll(struct napi_struct *napi, int budget)
1719{
1720 int work_done;
1721 struct qlcnic_host_tx_ring *tx_ring;
1722 struct qlcnic_adapter *adapter;
1723
1724 budget = QLCNIC_TX_POLL_BUDGET;
1725 tx_ring = container_of(napi, struct qlcnic_host_tx_ring, napi);
1726 adapter = tx_ring->adapter;
1727 work_done = qlcnic_process_cmd_ring(adapter, tx_ring, budget);
1728 if (work_done) {
1729 napi_complete(&tx_ring->napi);
1730 if (test_bit(__QLCNIC_DEV_UP , &adapter->state))
1731 qlcnic_83xx_enable_tx_intr(adapter, tx_ring);
1732 }
1733
1734 return work_done;
1735}
1736
1737static int qlcnic_83xx_rx_poll(struct napi_struct *napi, int budget)
1738{
1739 int work_done;
1740 struct qlcnic_host_sds_ring *sds_ring;
1741 struct qlcnic_adapter *adapter;
1742
1743 sds_ring = container_of(napi, struct qlcnic_host_sds_ring, napi);
1744 adapter = sds_ring->adapter;
1745 work_done = qlcnic_83xx_process_rcv_ring(sds_ring, budget);
1746 if (work_done < budget) {
1747 napi_complete(&sds_ring->napi);
1748 if (test_bit(__QLCNIC_DEV_UP, &adapter->state))
1749 qlcnic_83xx_enable_intr(adapter, sds_ring);
1750 }
1751
1752 return work_done;
1753}
1754
1755void qlcnic_83xx_napi_enable(struct qlcnic_adapter *adapter)
1756{
1757 int ring;
1758 struct qlcnic_host_sds_ring *sds_ring;
1759 struct qlcnic_host_tx_ring *tx_ring;
1760 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1761
1762 if (adapter->is_up != QLCNIC_ADAPTER_UP_MAGIC)
1763 return;
1764
1765 for (ring = 0; ring < adapter->max_sds_rings; ring++) {
1766 sds_ring = &recv_ctx->sds_rings[ring];
1767 napi_enable(&sds_ring->napi);
ac166700
HM		 1768 if (adapter->flags & QLCNIC_MSIX_ENABLED)
1769 qlcnic_83xx_enable_intr(adapter, sds_ring);
4be41e92
SC		 1770 }
1771
1772 if (adapter->flags & QLCNIC_MSIX_ENABLED) {
1773 for (ring = 0; ring < adapter->max_drv_tx_rings; ring++) {
1774 tx_ring = &adapter->tx_ring[ring];
1775 napi_enable(&tx_ring->napi);
1776 qlcnic_83xx_enable_tx_intr(adapter, tx_ring);
1777 }
1778 }
1779}
1780
1781void qlcnic_83xx_napi_disable(struct qlcnic_adapter *adapter)
1782{
1783 int ring;
1784 struct qlcnic_host_sds_ring *sds_ring;
1785 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1786 struct qlcnic_host_tx_ring *tx_ring;
1787
1788 if (adapter->is_up != QLCNIC_ADAPTER_UP_MAGIC)
1789 return;
1790
1791 for (ring = 0; ring < adapter->max_sds_rings; ring++) {
1792 sds_ring = &recv_ctx->sds_rings[ring];
ac166700
HM		 1793 if (adapter->flags & QLCNIC_MSIX_ENABLED)
1794 qlcnic_83xx_disable_intr(adapter, sds_ring);
4be41e92
SC		 1795 napi_synchronize(&sds_ring->napi);
1796 napi_disable(&sds_ring->napi);
1797 }
1798
1799 if (adapter->flags & QLCNIC_MSIX_ENABLED) {
1800 for (ring = 0; ring < adapter->max_drv_tx_rings; ring++) {
1801 tx_ring = &adapter->tx_ring[ring];
1802 qlcnic_83xx_disable_tx_intr(adapter, tx_ring);
1803 napi_synchronize(&tx_ring->napi);
1804 napi_disable(&tx_ring->napi);
1805 }
1806 }
1807}
1808
1809int qlcnic_83xx_napi_add(struct qlcnic_adapter *adapter,
1810 struct net_device *netdev)
1811{
1812 int ring, max_sds_rings;
1813 struct qlcnic_host_sds_ring *sds_ring;
1814 struct qlcnic_host_tx_ring *tx_ring;
1815 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1816
1817 if (qlcnic_alloc_sds_rings(recv_ctx, adapter->max_sds_rings))
1818 return -ENOMEM;
1819
1820 max_sds_rings = adapter->max_sds_rings;
1821 for (ring = 0; ring < adapter->max_sds_rings; ring++) {
1822 sds_ring = &recv_ctx->sds_rings[ring];
1823 if (adapter->flags & QLCNIC_MSIX_ENABLED)
1824 netif_napi_add(netdev, &sds_ring->napi,
1825 qlcnic_83xx_rx_poll,
1826 QLCNIC_NETDEV_WEIGHT * 2);
1827 else
1828 netif_napi_add(netdev, &sds_ring->napi,
1829 qlcnic_83xx_poll,
1830 QLCNIC_NETDEV_WEIGHT / max_sds_rings);
1831 }
1832
1833 if (qlcnic_alloc_tx_rings(adapter, netdev)) {
1834 qlcnic_free_sds_rings(recv_ctx);
1835 return -ENOMEM;
1836 }
1837
1838 if (adapter->flags & QLCNIC_MSIX_ENABLED) {
1839 for (ring = 0; ring < adapter->max_drv_tx_rings; ring++) {
1840 tx_ring = &adapter->tx_ring[ring];
1841 netif_napi_add(netdev, &tx_ring->napi,
1842 qlcnic_83xx_msix_tx_poll,
1843 QLCNIC_NETDEV_WEIGHT);
1844 }
1845 }
1846
1847 return 0;
1848}
1849
1850void qlcnic_83xx_napi_del(struct qlcnic_adapter *adapter)
1851{
1852 int ring;
1853 struct qlcnic_host_sds_ring *sds_ring;
1854 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1855 struct qlcnic_host_tx_ring *tx_ring;
1856
1857 for (ring = 0; ring < adapter->max_sds_rings; ring++) {
1858 sds_ring = &recv_ctx->sds_rings[ring];
1859 netif_napi_del(&sds_ring->napi);
1860 }
1861
1862 qlcnic_free_sds_rings(adapter->recv_ctx);
1863
1864 if ((adapter->flags & QLCNIC_MSIX_ENABLED)) {
1865 for (ring = 0; ring < adapter->max_drv_tx_rings; ring++) {
1866 tx_ring = &adapter->tx_ring[ring];
1867 netif_napi_del(&tx_ring->napi);
1868 }
1869 }
1870
1871 qlcnic_free_tx_rings(adapter);
1872}
1873
1874void qlcnic_83xx_process_rcv_diag(struct qlcnic_adapter *adapter,
1875 int ring, u64 sts_data[])
1876{
1877 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1878 struct sk_buff *skb;
1879 struct qlcnic_host_rds_ring *rds_ring;
1880 int index, length;
1881
1882 if (unlikely(ring >= adapter->max_rds_rings))
1883 return;
1884
1885 rds_ring = &recv_ctx->rds_rings[ring];
1886 index = qlcnic_83xx_hndl(sts_data[0]);
1887 if (unlikely(index >= rds_ring->num_desc))
1888 return;
1889
1890 length = qlcnic_83xx_pktln(sts_data[0]);
1891
1892 skb = qlcnic_process_rxbuf(adapter, rds_ring, index, STATUS_CKSUM_OK);
1893 if (!skb)
1894 return;
1895
1896 if (length > rds_ring->skb_size)
1897 skb_put(skb, rds_ring->skb_size);
1898 else
1899 skb_put(skb, length);
1900
1901 if (!qlcnic_check_loopback_buff(skb->data, adapter->mac_addr))
1902 adapter->ahw->diag_cnt++;
1903 else
1904 dump_skb(skb, adapter);
1905
1906 dev_kfree_skb_any(skb);
1907 return;
1908}
1909
1910void qlcnic_83xx_process_rcv_ring_diag(struct qlcnic_host_sds_ring *sds_ring)
1911{
1912 struct qlcnic_adapter *adapter = sds_ring->adapter;
1913 struct status_desc *desc;
1914 u64 sts_data[2];
1915 int ring, opcode;
1916 u32 consumer = sds_ring->consumer;
1917
1918 desc = &sds_ring->desc_head[consumer];
1919 sts_data[0] = le64_to_cpu(desc->status_desc_data[0]);
1920 sts_data[1] = le64_to_cpu(desc->status_desc_data[1]);
1921 opcode = qlcnic_83xx_opcode(sts_data[1]);
1922 if (!opcode)
1923 return;
1924
1925 ring = QLCNIC_FETCH_RING_ID(qlcnic_83xx_hndl(sts_data[0]));
1926 qlcnic_83xx_process_rcv_diag(adapter, ring, sts_data);
1927 desc = &sds_ring->desc_head[consumer];
1928 desc->status_desc_data[0] = cpu_to_le64(STATUS_OWNER_PHANTOM);
1929 consumer = get_next_index(consumer, sds_ring->num_desc);
1930 sds_ring->consumer = consumer;
1931 writel(consumer, sds_ring->crb_sts_consumer);
1932}
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