1 #include <linux/netdevice.h>
2 #include <linux/if_vlan.h>
4 #include <linux/ipv6.h>
8 #define QLCNIC_MAC_HASH(MAC)\
9 ((((MAC) & 0x70000) >> 0x10) | (((MAC) & 0x70000000000ULL) >> 0x25))
11 #define TX_ETHER_PKT 0x01
12 #define TX_TCP_PKT 0x02
13 #define TX_UDP_PKT 0x03
14 #define TX_IP_PKT 0x04
15 #define TX_TCP_LSO 0x05
16 #define TX_TCP_LSO6 0x06
17 #define TX_TCPV6_PKT 0x0b
18 #define TX_UDPV6_PKT 0x0c
19 #define FLAGS_VLAN_TAGGED 0x10
20 #define FLAGS_VLAN_OOB 0x40
22 #define qlcnic_set_tx_vlan_tci(cmd_desc, v) \
23 (cmd_desc)->vlan_TCI = cpu_to_le16(v);
24 #define qlcnic_set_cmd_desc_port(cmd_desc, var) \
25 ((cmd_desc)->port_ctxid |= ((var) & 0x0F))
26 #define qlcnic_set_cmd_desc_ctxid(cmd_desc, var) \
27 ((cmd_desc)->port_ctxid |= ((var) << 4 & 0xF0))
29 #define qlcnic_set_tx_port(_desc, _port) \
30 ((_desc)->port_ctxid = ((_port) & 0xf) | (((_port) << 4) & 0xf0))
32 #define qlcnic_set_tx_flags_opcode(_desc, _flags, _opcode) \
33 ((_desc)->flags_opcode |= \
34 cpu_to_le16(((_flags) & 0x7f) | (((_opcode) & 0x3f) << 7)))
36 #define qlcnic_set_tx_frags_len(_desc, _frags, _len) \
37 ((_desc)->nfrags__length = \
38 cpu_to_le32(((_frags) & 0xff) | (((_len) & 0xffffff) << 8)))
40 /* owner bits of status_desc */
41 #define STATUS_OWNER_HOST (0x1ULL << 56)
42 #define STATUS_OWNER_PHANTOM (0x2ULL << 56)
45 0-3 port, 4-7 status, 8-11 type, 12-27 total_length
46 28-43 reference_handle, 44-47 protocol, 48-52 pkt_offset
47 53-55 desc_cnt, 56-57 owner, 58-63 opcode
49 #define qlcnic_get_sts_port(sts_data) \
51 #define qlcnic_get_sts_status(sts_data) \
52 (((sts_data) >> 4) & 0x0F)
53 #define qlcnic_get_sts_type(sts_data) \
54 (((sts_data) >> 8) & 0x0F)
55 #define qlcnic_get_sts_totallength(sts_data) \
56 (((sts_data) >> 12) & 0xFFFF)
57 #define qlcnic_get_sts_refhandle(sts_data) \
58 (((sts_data) >> 28) & 0xFFFF)
59 #define qlcnic_get_sts_prot(sts_data) \
60 (((sts_data) >> 44) & 0x0F)
61 #define qlcnic_get_sts_pkt_offset(sts_data) \
62 (((sts_data) >> 48) & 0x1F)
63 #define qlcnic_get_sts_desc_cnt(sts_data) \
64 (((sts_data) >> 53) & 0x7)
65 #define qlcnic_get_sts_opcode(sts_data) \
66 (((sts_data) >> 58) & 0x03F)
68 #define qlcnic_get_lro_sts_refhandle(sts_data) \
69 ((sts_data) & 0x07FFF)
70 #define qlcnic_get_lro_sts_length(sts_data) \
71 (((sts_data) >> 16) & 0x0FFFF)
72 #define qlcnic_get_lro_sts_l2_hdr_offset(sts_data) \
73 (((sts_data) >> 32) & 0x0FF)
74 #define qlcnic_get_lro_sts_l4_hdr_offset(sts_data) \
75 (((sts_data) >> 40) & 0x0FF)
76 #define qlcnic_get_lro_sts_timestamp(sts_data) \
77 (((sts_data) >> 48) & 0x1)
78 #define qlcnic_get_lro_sts_type(sts_data) \
79 (((sts_data) >> 49) & 0x7)
80 #define qlcnic_get_lro_sts_push_flag(sts_data) \
81 (((sts_data) >> 52) & 0x1)
82 #define qlcnic_get_lro_sts_seq_number(sts_data) \
83 ((sts_data) & 0x0FFFFFFFF)
84 #define qlcnic_get_lro_sts_mss(sts_data1) \
85 ((sts_data1 >> 32) & 0x0FFFF)
87 /* opcode field in status_desc */
88 #define QLCNIC_SYN_OFFLOAD 0x03
89 #define QLCNIC_RXPKT_DESC 0x04
90 #define QLCNIC_OLD_RXPKT_DESC 0x3f
91 #define QLCNIC_RESPONSE_DESC 0x05
92 #define QLCNIC_LRO_DESC 0x12
94 /* for status field in status_desc */
95 #define STATUS_CKSUM_LOOP 0
96 #define STATUS_CKSUM_OK 2
98 void qlcnic_82xx_change_filter(struct qlcnic_adapter *adapter, u64 *uaddr,
101 struct cmd_desc_type0 *hwdesc;
102 struct qlcnic_nic_req *req;
103 struct qlcnic_mac_req *mac_req;
104 struct qlcnic_vlan_req *vlan_req;
105 struct qlcnic_host_tx_ring *tx_ring = adapter->tx_ring;
109 producer = tx_ring->producer;
110 hwdesc = &tx_ring->desc_head[tx_ring->producer];
112 req = (struct qlcnic_nic_req *)hwdesc;
113 memset(req, 0, sizeof(struct qlcnic_nic_req));
114 req->qhdr = cpu_to_le64(QLCNIC_REQUEST << 23);
116 word = QLCNIC_MAC_EVENT | ((u64)(adapter->portnum) << 16);
117 req->req_hdr = cpu_to_le64(word);
119 mac_req = (struct qlcnic_mac_req *)&(req->words[0]);
120 mac_req->op = vlan_id ? QLCNIC_MAC_VLAN_ADD : QLCNIC_MAC_ADD;
121 memcpy(mac_req->mac_addr, &uaddr, ETH_ALEN);
123 vlan_req = (struct qlcnic_vlan_req *)&req->words[1];
124 vlan_req->vlan_id = vlan_id;
126 tx_ring->producer = get_next_index(producer, tx_ring->num_desc);
130 static void qlcnic_send_filter(struct qlcnic_adapter *adapter,
131 struct qlcnic_host_tx_ring *tx_ring,
132 struct cmd_desc_type0 *first_desc,
135 struct qlcnic_filter *fil, *tmp_fil;
136 struct hlist_node *tmp_hnode, *n;
137 struct hlist_head *head;
138 struct ethhdr *phdr = (struct ethhdr *)(skb->data);
143 if (!compare_ether_addr(phdr->h_source, adapter->mac_addr))
146 if (adapter->fhash.fnum >= adapter->fhash.fmax)
149 /* Only NPAR capable devices support vlan based learning */
150 if (adapter->flags & QLCNIC_ESWITCH_ENABLED)
151 vlan_id = first_desc->vlan_TCI;
152 memcpy(&src_addr, phdr->h_source, ETH_ALEN);
153 hindex = QLCNIC_MAC_HASH(src_addr) & (QLCNIC_LB_MAX_FILTERS - 1);
154 head = &(adapter->fhash.fhead[hindex]);
156 hlist_for_each_entry_safe(tmp_fil, tmp_hnode, n, head, fnode) {
157 if (!memcmp(tmp_fil->faddr, &src_addr, ETH_ALEN) &&
158 tmp_fil->vlan_id == vlan_id) {
159 if (jiffies > (QLCNIC_READD_AGE * HZ + tmp_fil->ftime))
160 qlcnic_change_filter(adapter, &src_addr,
162 tmp_fil->ftime = jiffies;
167 fil = kzalloc(sizeof(struct qlcnic_filter), GFP_ATOMIC);
171 qlcnic_change_filter(adapter, &src_addr, vlan_id);
172 fil->ftime = jiffies;
173 fil->vlan_id = vlan_id;
174 memcpy(fil->faddr, &src_addr, ETH_ALEN);
175 spin_lock(&adapter->mac_learn_lock);
176 hlist_add_head(&(fil->fnode), head);
177 adapter->fhash.fnum++;
178 spin_unlock(&adapter->mac_learn_lock);
181 static int qlcnic_tx_pkt(struct qlcnic_adapter *adapter,
182 struct cmd_desc_type0 *first_desc, struct sk_buff *skb)
184 u8 l4proto, opcode = 0, hdr_len = 0;
185 u16 flags = 0, vlan_tci = 0;
186 int copied, offset, copy_len, size;
187 struct cmd_desc_type0 *hwdesc;
188 struct vlan_ethhdr *vh;
189 struct qlcnic_host_tx_ring *tx_ring = adapter->tx_ring;
190 u16 protocol = ntohs(skb->protocol);
191 u32 producer = tx_ring->producer;
193 if (protocol == ETH_P_8021Q) {
194 vh = (struct vlan_ethhdr *)skb->data;
195 flags = FLAGS_VLAN_TAGGED;
196 vlan_tci = ntohs(vh->h_vlan_TCI);
197 protocol = ntohs(vh->h_vlan_encapsulated_proto);
198 } else if (vlan_tx_tag_present(skb)) {
199 flags = FLAGS_VLAN_OOB;
200 vlan_tci = vlan_tx_tag_get(skb);
202 if (unlikely(adapter->pvid)) {
203 if (vlan_tci && !(adapter->flags & QLCNIC_TAGGING_ENABLED))
205 if (vlan_tci && (adapter->flags & QLCNIC_TAGGING_ENABLED))
208 flags = FLAGS_VLAN_OOB;
209 vlan_tci = adapter->pvid;
212 qlcnic_set_tx_vlan_tci(first_desc, vlan_tci);
213 qlcnic_set_tx_flags_opcode(first_desc, flags, opcode);
215 if (*(skb->data) & BIT_0) {
217 memcpy(&first_desc->eth_addr, skb->data, ETH_ALEN);
219 opcode = TX_ETHER_PKT;
220 if ((adapter->netdev->features & (NETIF_F_TSO | NETIF_F_TSO6)) &&
221 skb_shinfo(skb)->gso_size > 0) {
222 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
223 first_desc->mss = cpu_to_le16(skb_shinfo(skb)->gso_size);
224 first_desc->total_hdr_length = hdr_len;
225 opcode = (protocol == ETH_P_IPV6) ? TX_TCP_LSO6 : TX_TCP_LSO;
227 /* For LSO, we need to copy the MAC/IP/TCP headers into
228 * the descriptor ring */
232 if (flags & FLAGS_VLAN_OOB) {
233 first_desc->total_hdr_length += VLAN_HLEN;
234 first_desc->tcp_hdr_offset = VLAN_HLEN;
235 first_desc->ip_hdr_offset = VLAN_HLEN;
237 /* Only in case of TSO on vlan device */
238 flags |= FLAGS_VLAN_TAGGED;
240 /* Create a TSO vlan header template for firmware */
241 hwdesc = &tx_ring->desc_head[producer];
242 tx_ring->cmd_buf_arr[producer].skb = NULL;
244 copy_len = min((int)sizeof(struct cmd_desc_type0) -
245 offset, hdr_len + VLAN_HLEN);
247 vh = (struct vlan_ethhdr *)((char *) hwdesc + 2);
248 skb_copy_from_linear_data(skb, vh, 12);
249 vh->h_vlan_proto = htons(ETH_P_8021Q);
250 vh->h_vlan_TCI = htons(vlan_tci);
252 skb_copy_from_linear_data_offset(skb, 12,
255 copied = copy_len - VLAN_HLEN;
257 producer = get_next_index(producer, tx_ring->num_desc);
260 while (copied < hdr_len) {
261 size = (int)sizeof(struct cmd_desc_type0) - offset;
262 copy_len = min(size, (hdr_len - copied));
263 hwdesc = &tx_ring->desc_head[producer];
264 tx_ring->cmd_buf_arr[producer].skb = NULL;
265 skb_copy_from_linear_data_offset(skb, copied,
270 producer = get_next_index(producer, tx_ring->num_desc);
273 tx_ring->producer = producer;
275 adapter->stats.lso_frames++;
277 } else if (skb->ip_summed == CHECKSUM_PARTIAL) {
278 if (protocol == ETH_P_IP) {
279 l4proto = ip_hdr(skb)->protocol;
281 if (l4proto == IPPROTO_TCP)
283 else if (l4proto == IPPROTO_UDP)
285 } else if (protocol == ETH_P_IPV6) {
286 l4proto = ipv6_hdr(skb)->nexthdr;
288 if (l4proto == IPPROTO_TCP)
289 opcode = TX_TCPV6_PKT;
290 else if (l4proto == IPPROTO_UDP)
291 opcode = TX_UDPV6_PKT;
294 first_desc->tcp_hdr_offset += skb_transport_offset(skb);
295 first_desc->ip_hdr_offset += skb_network_offset(skb);
296 qlcnic_set_tx_flags_opcode(first_desc, flags, opcode);
301 static int qlcnic_map_tx_skb(struct pci_dev *pdev, struct sk_buff *skb,
302 struct qlcnic_cmd_buffer *pbuf)
304 struct qlcnic_skb_frag *nf;
305 struct skb_frag_struct *frag;
309 nr_frags = skb_shinfo(skb)->nr_frags;
310 nf = &pbuf->frag_array[0];
312 map = pci_map_single(pdev, skb->data, skb_headlen(skb),
314 if (pci_dma_mapping_error(pdev, map))
318 nf->length = skb_headlen(skb);
320 for (i = 0; i < nr_frags; i++) {
321 frag = &skb_shinfo(skb)->frags[i];
322 nf = &pbuf->frag_array[i+1];
323 map = skb_frag_dma_map(&pdev->dev, frag, 0, skb_frag_size(frag),
325 if (dma_mapping_error(&pdev->dev, map))
329 nf->length = skb_frag_size(frag);
336 nf = &pbuf->frag_array[i+1];
337 pci_unmap_page(pdev, nf->dma, nf->length, PCI_DMA_TODEVICE);
340 nf = &pbuf->frag_array[0];
341 pci_unmap_single(pdev, nf->dma, skb_headlen(skb), PCI_DMA_TODEVICE);
347 static void qlcnic_unmap_buffers(struct pci_dev *pdev, struct sk_buff *skb,
348 struct qlcnic_cmd_buffer *pbuf)
350 struct qlcnic_skb_frag *nf = &pbuf->frag_array[0];
351 int i, nr_frags = skb_shinfo(skb)->nr_frags;
353 for (i = 0; i < nr_frags; i++) {
354 nf = &pbuf->frag_array[i+1];
355 pci_unmap_page(pdev, nf->dma, nf->length, PCI_DMA_TODEVICE);
358 nf = &pbuf->frag_array[0];
359 pci_unmap_single(pdev, nf->dma, skb_headlen(skb), PCI_DMA_TODEVICE);
363 static inline void qlcnic_clear_cmddesc(u64 *desc)
370 netdev_tx_t qlcnic_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
372 struct qlcnic_adapter *adapter = netdev_priv(netdev);
373 struct qlcnic_host_tx_ring *tx_ring = adapter->tx_ring;
374 struct qlcnic_cmd_buffer *pbuf;
375 struct qlcnic_skb_frag *buffrag;
376 struct cmd_desc_type0 *hwdesc, *first_desc;
377 struct pci_dev *pdev;
379 int i, k, frag_count, delta = 0;
380 u32 producer, num_txd;
382 num_txd = tx_ring->num_desc;
384 if (!test_bit(__QLCNIC_DEV_UP, &adapter->state)) {
385 netif_stop_queue(netdev);
386 return NETDEV_TX_BUSY;
389 if (adapter->flags & QLCNIC_MACSPOOF) {
390 phdr = (struct ethhdr *)skb->data;
391 if (!ether_addr_equal(phdr->h_source, adapter->mac_addr))
395 frag_count = skb_shinfo(skb)->nr_frags + 1;
396 /* 14 frags supported for normal packet and
397 * 32 frags supported for TSO packet
399 if (!skb_is_gso(skb) && frag_count > QLCNIC_MAX_FRAGS_PER_TX) {
400 for (i = 0; i < (frag_count - QLCNIC_MAX_FRAGS_PER_TX); i++)
401 delta += skb_frag_size(&skb_shinfo(skb)->frags[i]);
403 if (!__pskb_pull_tail(skb, delta))
406 frag_count = 1 + skb_shinfo(skb)->nr_frags;
409 if (unlikely(qlcnic_tx_avail(tx_ring) <= TX_STOP_THRESH)) {
410 netif_stop_queue(netdev);
411 if (qlcnic_tx_avail(tx_ring) > TX_STOP_THRESH) {
412 netif_start_queue(netdev);
414 adapter->stats.xmit_off++;
415 return NETDEV_TX_BUSY;
419 producer = tx_ring->producer;
420 pbuf = &tx_ring->cmd_buf_arr[producer];
421 pdev = adapter->pdev;
422 first_desc = &tx_ring->desc_head[producer];
423 hwdesc = &tx_ring->desc_head[producer];
424 qlcnic_clear_cmddesc((u64 *)hwdesc);
426 if (qlcnic_map_tx_skb(pdev, skb, pbuf)) {
427 adapter->stats.tx_dma_map_error++;
432 pbuf->frag_count = frag_count;
434 qlcnic_set_tx_frags_len(first_desc, frag_count, skb->len);
435 qlcnic_set_tx_port(first_desc, adapter->portnum);
437 for (i = 0; i < frag_count; i++) {
440 if ((k == 0) && (i > 0)) {
441 /* move to next desc.*/
442 producer = get_next_index(producer, num_txd);
443 hwdesc = &tx_ring->desc_head[producer];
444 qlcnic_clear_cmddesc((u64 *)hwdesc);
445 tx_ring->cmd_buf_arr[producer].skb = NULL;
448 buffrag = &pbuf->frag_array[i];
449 hwdesc->buffer_length[k] = cpu_to_le16(buffrag->length);
452 hwdesc->addr_buffer1 = cpu_to_le64(buffrag->dma);
455 hwdesc->addr_buffer2 = cpu_to_le64(buffrag->dma);
458 hwdesc->addr_buffer3 = cpu_to_le64(buffrag->dma);
461 hwdesc->addr_buffer4 = cpu_to_le64(buffrag->dma);
466 tx_ring->producer = get_next_index(producer, num_txd);
469 if (unlikely(qlcnic_tx_pkt(adapter, first_desc, skb)))
472 if (adapter->mac_learn)
473 qlcnic_send_filter(adapter, tx_ring, first_desc, skb);
475 adapter->stats.txbytes += skb->len;
476 adapter->stats.xmitcalled++;
478 qlcnic_update_cmd_producer(tx_ring);
483 qlcnic_unmap_buffers(pdev, skb, pbuf);
485 adapter->stats.txdropped++;
486 dev_kfree_skb_any(skb);
490 void qlcnic_advert_link_change(struct qlcnic_adapter *adapter, int linkup)
492 struct net_device *netdev = adapter->netdev;
494 if (adapter->ahw->linkup && !linkup) {
495 netdev_info(netdev, "NIC Link is down\n");
496 adapter->ahw->linkup = 0;
497 if (netif_running(netdev)) {
498 netif_carrier_off(netdev);
499 netif_stop_queue(netdev);
501 } else if (!adapter->ahw->linkup && linkup) {
502 netdev_info(netdev, "NIC Link is up\n");
503 adapter->ahw->linkup = 1;
504 if (netif_running(netdev)) {
505 netif_carrier_on(netdev);
506 netif_wake_queue(netdev);
511 static int qlcnic_alloc_rx_skb(struct qlcnic_adapter *adapter,
512 struct qlcnic_host_rds_ring *rds_ring,
513 struct qlcnic_rx_buffer *buffer)
517 struct pci_dev *pdev = adapter->pdev;
519 skb = netdev_alloc_skb(adapter->netdev, rds_ring->skb_size);
521 adapter->stats.skb_alloc_failure++;
525 skb_reserve(skb, NET_IP_ALIGN);
526 dma = pci_map_single(pdev, skb->data, rds_ring->dma_size,
529 if (pci_dma_mapping_error(pdev, dma)) {
530 adapter->stats.rx_dma_map_error++;
531 dev_kfree_skb_any(skb);
541 static void qlcnic_post_rx_buffers_nodb(struct qlcnic_adapter *adapter,
542 struct qlcnic_host_rds_ring *rds_ring)
544 struct rcv_desc *pdesc;
545 struct qlcnic_rx_buffer *buffer;
548 struct list_head *head;
550 if (!spin_trylock(&rds_ring->lock))
553 producer = rds_ring->producer;
554 head = &rds_ring->free_list;
556 while (!list_empty(head)) {
557 buffer = list_entry(head->next, struct qlcnic_rx_buffer, list);
560 if (qlcnic_alloc_rx_skb(adapter, rds_ring, buffer))
565 list_del(&buffer->list);
567 /* make a rcv descriptor */
568 pdesc = &rds_ring->desc_head[producer];
569 pdesc->reference_handle = cpu_to_le16(buffer->ref_handle);
570 pdesc->buffer_length = cpu_to_le32(rds_ring->dma_size);
571 pdesc->addr_buffer = cpu_to_le64(buffer->dma);
572 producer = get_next_index(producer, rds_ring->num_desc);
576 rds_ring->producer = producer;
577 writel((producer - 1) & (rds_ring->num_desc - 1),
578 rds_ring->crb_rcv_producer);
581 spin_unlock(&rds_ring->lock);
584 static int qlcnic_process_cmd_ring(struct qlcnic_adapter *adapter)
586 u32 sw_consumer, hw_consumer;
587 int i, done, count = 0;
588 struct qlcnic_cmd_buffer *buffer;
589 struct pci_dev *pdev = adapter->pdev;
590 struct net_device *netdev = adapter->netdev;
591 struct qlcnic_skb_frag *frag;
592 struct qlcnic_host_tx_ring *tx_ring = adapter->tx_ring;
594 if (!spin_trylock(&adapter->tx_clean_lock))
597 sw_consumer = tx_ring->sw_consumer;
598 hw_consumer = le32_to_cpu(*(tx_ring->hw_consumer));
600 while (sw_consumer != hw_consumer) {
601 buffer = &tx_ring->cmd_buf_arr[sw_consumer];
603 frag = &buffer->frag_array[0];
604 pci_unmap_single(pdev, frag->dma, frag->length,
607 for (i = 1; i < buffer->frag_count; i++) {
609 pci_unmap_page(pdev, frag->dma, frag->length,
614 adapter->stats.xmitfinished++;
615 dev_kfree_skb_any(buffer->skb);
619 sw_consumer = get_next_index(sw_consumer, tx_ring->num_desc);
620 if (++count >= MAX_STATUS_HANDLE)
624 if (count && netif_running(netdev)) {
625 tx_ring->sw_consumer = sw_consumer;
629 if (netif_queue_stopped(netdev) && netif_carrier_ok(netdev)) {
630 if (qlcnic_tx_avail(tx_ring) > TX_STOP_THRESH) {
631 netif_wake_queue(netdev);
632 adapter->stats.xmit_on++;
635 adapter->tx_timeo_cnt = 0;
638 * If everything is freed up to consumer then check if the ring is full
639 * If the ring is full then check if more needs to be freed and
640 * schedule the call back again.
642 * This happens when there are 2 CPUs. One could be freeing and the
643 * other filling it. If the ring is full when we get out of here and
644 * the card has already interrupted the host then the host can miss the
647 * There is still a possible race condition and the host could miss an
648 * interrupt. The card has to take care of this.
650 hw_consumer = le32_to_cpu(*(tx_ring->hw_consumer));
651 done = (sw_consumer == hw_consumer);
653 spin_unlock(&adapter->tx_clean_lock);
658 static int qlcnic_poll(struct napi_struct *napi, int budget)
660 struct qlcnic_host_sds_ring *sds_ring;
661 struct qlcnic_adapter *adapter;
662 int tx_complete, work_done;
664 sds_ring = container_of(napi, struct qlcnic_host_sds_ring, napi);
665 adapter = sds_ring->adapter;
667 tx_complete = qlcnic_process_cmd_ring(adapter);
668 work_done = qlcnic_process_rcv_ring(sds_ring, budget);
670 if ((work_done < budget) && tx_complete) {
671 napi_complete(&sds_ring->napi);
672 if (test_bit(__QLCNIC_DEV_UP, &adapter->state))
673 qlcnic_enable_int(sds_ring);
679 static int qlcnic_rx_poll(struct napi_struct *napi, int budget)
681 struct qlcnic_host_sds_ring *sds_ring;
682 struct qlcnic_adapter *adapter;
685 sds_ring = container_of(napi, struct qlcnic_host_sds_ring, napi);
686 adapter = sds_ring->adapter;
688 work_done = qlcnic_process_rcv_ring(sds_ring, budget);
690 if (work_done < budget) {
691 napi_complete(&sds_ring->napi);
692 if (test_bit(__QLCNIC_DEV_UP, &adapter->state))
693 qlcnic_enable_int(sds_ring);
699 static void qlcnic_handle_linkevent(struct qlcnic_adapter *adapter,
700 struct qlcnic_fw_msg *msg)
703 u16 cable_len, link_speed;
704 u8 link_status, module, duplex, autoneg, lb_status = 0;
705 struct net_device *netdev = adapter->netdev;
707 adapter->ahw->has_link_events = 1;
709 cable_OUI = msg->body[1] & 0xffffffff;
710 cable_len = (msg->body[1] >> 32) & 0xffff;
711 link_speed = (msg->body[1] >> 48) & 0xffff;
713 link_status = msg->body[2] & 0xff;
714 duplex = (msg->body[2] >> 16) & 0xff;
715 autoneg = (msg->body[2] >> 24) & 0xff;
716 lb_status = (msg->body[2] >> 32) & 0x3;
718 module = (msg->body[2] >> 8) & 0xff;
719 if (module == LINKEVENT_MODULE_TWINAX_UNSUPPORTED_CABLE)
720 dev_info(&netdev->dev,
721 "unsupported cable: OUI 0x%x, length %d\n",
722 cable_OUI, cable_len);
723 else if (module == LINKEVENT_MODULE_TWINAX_UNSUPPORTED_CABLELEN)
724 dev_info(&netdev->dev, "unsupported cable length %d\n",
727 if (!link_status && (lb_status == QLCNIC_ILB_MODE ||
728 lb_status == QLCNIC_ELB_MODE))
729 adapter->ahw->loopback_state |= QLCNIC_LINKEVENT;
731 qlcnic_advert_link_change(adapter, link_status);
733 if (duplex == LINKEVENT_FULL_DUPLEX)
734 adapter->ahw->link_duplex = DUPLEX_FULL;
736 adapter->ahw->link_duplex = DUPLEX_HALF;
738 adapter->ahw->module_type = module;
739 adapter->ahw->link_autoneg = autoneg;
742 adapter->ahw->link_speed = link_speed;
744 adapter->ahw->link_speed = SPEED_UNKNOWN;
745 adapter->ahw->link_duplex = DUPLEX_UNKNOWN;
749 static void qlcnic_handle_fw_message(int desc_cnt, int index,
750 struct qlcnic_host_sds_ring *sds_ring)
752 struct qlcnic_fw_msg msg;
753 struct status_desc *desc;
754 struct qlcnic_adapter *adapter;
756 int i = 0, opcode, ret;
758 while (desc_cnt > 0 && i < 8) {
759 desc = &sds_ring->desc_head[index];
760 msg.words[i++] = le64_to_cpu(desc->status_desc_data[0]);
761 msg.words[i++] = le64_to_cpu(desc->status_desc_data[1]);
763 index = get_next_index(index, sds_ring->num_desc);
767 adapter = sds_ring->adapter;
768 dev = &adapter->pdev->dev;
769 opcode = qlcnic_get_nic_msg_opcode(msg.body[0]);
772 case QLCNIC_C2H_OPCODE_GET_LINKEVENT_RESPONSE:
773 qlcnic_handle_linkevent(adapter, &msg);
775 case QLCNIC_C2H_OPCODE_CONFIG_LOOPBACK:
776 ret = (u32)(msg.body[1]);
779 adapter->ahw->loopback_state |= QLCNIC_LB_RESPONSE;
782 dev_info(dev, "loopback already in progress\n");
783 adapter->ahw->diag_cnt = -QLCNIC_TEST_IN_PROGRESS;
786 dev_info(dev, "loopback cable is not connected\n");
787 adapter->ahw->diag_cnt = -QLCNIC_LB_CABLE_NOT_CONN;
791 "loopback configure request failed, err %x\n",
793 adapter->ahw->diag_cnt = -QLCNIC_UNDEFINED_ERROR;
802 static struct sk_buff *
803 qlcnic_process_rxbuf(struct qlcnic_adapter *adapter,
804 struct qlcnic_host_rds_ring *rds_ring, u16 index,
807 struct qlcnic_rx_buffer *buffer;
810 buffer = &rds_ring->rx_buf_arr[index];
812 if (unlikely(buffer->skb == NULL)) {
817 pci_unmap_single(adapter->pdev, buffer->dma, rds_ring->dma_size,
822 if (likely((adapter->netdev->features & NETIF_F_RXCSUM) &&
823 (cksum == STATUS_CKSUM_OK || cksum == STATUS_CKSUM_LOOP))) {
824 adapter->stats.csummed++;
825 skb->ip_summed = CHECKSUM_UNNECESSARY;
827 skb_checksum_none_assert(skb);
835 static inline int qlcnic_check_rx_tagging(struct qlcnic_adapter *adapter,
836 struct sk_buff *skb, u16 *vlan_tag)
838 struct ethhdr *eth_hdr;
840 if (!__vlan_get_tag(skb, vlan_tag)) {
841 eth_hdr = (struct ethhdr *)skb->data;
842 memmove(skb->data + VLAN_HLEN, eth_hdr, ETH_ALEN * 2);
843 skb_pull(skb, VLAN_HLEN);
848 if (*vlan_tag == adapter->pvid) {
849 /* Outer vlan tag. Packet should follow non-vlan path */
853 if (adapter->flags & QLCNIC_TAGGING_ENABLED)
859 static struct qlcnic_rx_buffer *
860 qlcnic_process_rcv(struct qlcnic_adapter *adapter,
861 struct qlcnic_host_sds_ring *sds_ring, int ring,
864 struct net_device *netdev = adapter->netdev;
865 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
866 struct qlcnic_rx_buffer *buffer;
868 struct qlcnic_host_rds_ring *rds_ring;
869 int index, length, cksum, pkt_offset;
872 if (unlikely(ring >= adapter->max_rds_rings))
875 rds_ring = &recv_ctx->rds_rings[ring];
877 index = qlcnic_get_sts_refhandle(sts_data0);
878 if (unlikely(index >= rds_ring->num_desc))
881 buffer = &rds_ring->rx_buf_arr[index];
882 length = qlcnic_get_sts_totallength(sts_data0);
883 cksum = qlcnic_get_sts_status(sts_data0);
884 pkt_offset = qlcnic_get_sts_pkt_offset(sts_data0);
886 skb = qlcnic_process_rxbuf(adapter, rds_ring, index, cksum);
890 if (length > rds_ring->skb_size)
891 skb_put(skb, rds_ring->skb_size);
893 skb_put(skb, length);
896 skb_pull(skb, pkt_offset);
898 if (unlikely(qlcnic_check_rx_tagging(adapter, skb, &vid))) {
899 adapter->stats.rxdropped++;
904 skb->protocol = eth_type_trans(skb, netdev);
907 __vlan_hwaccel_put_tag(skb, vid);
909 napi_gro_receive(&sds_ring->napi, skb);
911 adapter->stats.rx_pkts++;
912 adapter->stats.rxbytes += length;
917 #define QLC_TCP_HDR_SIZE 20
918 #define QLC_TCP_TS_OPTION_SIZE 12
919 #define QLC_TCP_TS_HDR_SIZE (QLC_TCP_HDR_SIZE + QLC_TCP_TS_OPTION_SIZE)
921 static struct qlcnic_rx_buffer *
922 qlcnic_process_lro(struct qlcnic_adapter *adapter,
923 int ring, u64 sts_data0, u64 sts_data1)
925 struct net_device *netdev = adapter->netdev;
926 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
927 struct qlcnic_rx_buffer *buffer;
929 struct qlcnic_host_rds_ring *rds_ring;
932 bool push, timestamp;
933 int index, l2_hdr_offset, l4_hdr_offset;
934 u16 lro_length, length, data_offset, vid = 0xffff;
937 if (unlikely(ring > adapter->max_rds_rings))
940 rds_ring = &recv_ctx->rds_rings[ring];
942 index = qlcnic_get_lro_sts_refhandle(sts_data0);
943 if (unlikely(index > rds_ring->num_desc))
946 buffer = &rds_ring->rx_buf_arr[index];
948 timestamp = qlcnic_get_lro_sts_timestamp(sts_data0);
949 lro_length = qlcnic_get_lro_sts_length(sts_data0);
950 l2_hdr_offset = qlcnic_get_lro_sts_l2_hdr_offset(sts_data0);
951 l4_hdr_offset = qlcnic_get_lro_sts_l4_hdr_offset(sts_data0);
952 push = qlcnic_get_lro_sts_push_flag(sts_data0);
953 seq_number = qlcnic_get_lro_sts_seq_number(sts_data1);
955 skb = qlcnic_process_rxbuf(adapter, rds_ring, index, STATUS_CKSUM_OK);
960 data_offset = l4_hdr_offset + QLC_TCP_TS_HDR_SIZE;
962 data_offset = l4_hdr_offset + QLC_TCP_HDR_SIZE;
964 skb_put(skb, lro_length + data_offset);
965 skb_pull(skb, l2_hdr_offset);
967 if (unlikely(qlcnic_check_rx_tagging(adapter, skb, &vid))) {
968 adapter->stats.rxdropped++;
973 skb->protocol = eth_type_trans(skb, netdev);
974 iph = (struct iphdr *)skb->data;
975 th = (struct tcphdr *)(skb->data + (iph->ihl << 2));
976 length = (iph->ihl << 2) + (th->doff << 2) + lro_length;
977 iph->tot_len = htons(length);
979 iph->check = ip_fast_csum((unsigned char *)iph, iph->ihl);
981 th->seq = htonl(seq_number);
984 if (adapter->flags & QLCNIC_FW_LRO_MSS_CAP)
985 skb_shinfo(skb)->gso_size = qlcnic_get_lro_sts_mss(sts_data1);
988 __vlan_hwaccel_put_tag(skb, vid);
989 netif_receive_skb(skb);
991 adapter->stats.lro_pkts++;
992 adapter->stats.lrobytes += length;
997 int qlcnic_process_rcv_ring(struct qlcnic_host_sds_ring *sds_ring, int max)
999 struct qlcnic_host_rds_ring *rds_ring;
1000 struct qlcnic_adapter *adapter = sds_ring->adapter;
1001 struct list_head *cur;
1002 struct status_desc *desc;
1003 struct qlcnic_rx_buffer *rxbuf;
1004 u64 sts_data0, sts_data1;
1005 __le64 owner_phantom = cpu_to_le64(STATUS_OWNER_PHANTOM);
1006 int opcode, ring, desc_cnt, count = 0;
1007 u32 consumer = sds_ring->consumer;
1009 while (count < max) {
1010 desc = &sds_ring->desc_head[consumer];
1011 sts_data0 = le64_to_cpu(desc->status_desc_data[0]);
1013 if (!(sts_data0 & STATUS_OWNER_HOST))
1016 desc_cnt = qlcnic_get_sts_desc_cnt(sts_data0);
1017 opcode = qlcnic_get_sts_opcode(sts_data0);
1020 case QLCNIC_RXPKT_DESC:
1021 case QLCNIC_OLD_RXPKT_DESC:
1022 case QLCNIC_SYN_OFFLOAD:
1023 ring = qlcnic_get_sts_type(sts_data0);
1024 rxbuf = qlcnic_process_rcv(adapter, sds_ring, ring,
1027 case QLCNIC_LRO_DESC:
1028 ring = qlcnic_get_lro_sts_type(sts_data0);
1029 sts_data1 = le64_to_cpu(desc->status_desc_data[1]);
1030 rxbuf = qlcnic_process_lro(adapter, ring, sts_data0,
1033 case QLCNIC_RESPONSE_DESC:
1034 qlcnic_handle_fw_message(desc_cnt, consumer, sds_ring);
1039 WARN_ON(desc_cnt > 1);
1042 list_add_tail(&rxbuf->list, &sds_ring->free_list[ring]);
1044 adapter->stats.null_rxbuf++;
1047 for (; desc_cnt > 0; desc_cnt--) {
1048 desc = &sds_ring->desc_head[consumer];
1049 desc->status_desc_data[0] = owner_phantom;
1050 consumer = get_next_index(consumer, sds_ring->num_desc);
1055 for (ring = 0; ring < adapter->max_rds_rings; ring++) {
1056 rds_ring = &adapter->recv_ctx->rds_rings[ring];
1058 if (!list_empty(&sds_ring->free_list[ring])) {
1059 list_for_each(cur, &sds_ring->free_list[ring]) {
1060 rxbuf = list_entry(cur, struct qlcnic_rx_buffer,
1062 qlcnic_alloc_rx_skb(adapter, rds_ring, rxbuf);
1064 spin_lock(&rds_ring->lock);
1065 list_splice_tail_init(&sds_ring->free_list[ring],
1066 &rds_ring->free_list);
1067 spin_unlock(&rds_ring->lock);
1070 qlcnic_post_rx_buffers_nodb(adapter, rds_ring);
1074 sds_ring->consumer = consumer;
1075 writel(consumer, sds_ring->crb_sts_consumer);
1081 void qlcnic_post_rx_buffers(struct qlcnic_adapter *adapter,
1082 struct qlcnic_host_rds_ring *rds_ring)
1084 struct rcv_desc *pdesc;
1085 struct qlcnic_rx_buffer *buffer;
1088 struct list_head *head;
1090 producer = rds_ring->producer;
1091 head = &rds_ring->free_list;
1093 while (!list_empty(head)) {
1095 buffer = list_entry(head->next, struct qlcnic_rx_buffer, list);
1098 if (qlcnic_alloc_rx_skb(adapter, rds_ring, buffer))
1103 list_del(&buffer->list);
1105 /* make a rcv descriptor */
1106 pdesc = &rds_ring->desc_head[producer];
1107 pdesc->addr_buffer = cpu_to_le64(buffer->dma);
1108 pdesc->reference_handle = cpu_to_le16(buffer->ref_handle);
1109 pdesc->buffer_length = cpu_to_le32(rds_ring->dma_size);
1110 producer = get_next_index(producer, rds_ring->num_desc);
1114 rds_ring->producer = producer;
1115 writel((producer-1) & (rds_ring->num_desc-1),
1116 rds_ring->crb_rcv_producer);
1120 static void dump_skb(struct sk_buff *skb, struct qlcnic_adapter *adapter)
1123 unsigned char *data = skb->data;
1125 pr_info(KERN_INFO "\n");
1126 for (i = 0; i < skb->len; i++) {
1127 QLCDB(adapter, DRV, "%02x ", data[i]);
1128 if ((i & 0x0f) == 8)
1129 pr_info(KERN_INFO "\n");
1133 static void qlcnic_process_rcv_diag(struct qlcnic_adapter *adapter, int ring,
1136 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1137 struct sk_buff *skb;
1138 struct qlcnic_host_rds_ring *rds_ring;
1139 int index, length, cksum, pkt_offset;
1141 if (unlikely(ring >= adapter->max_rds_rings))
1144 rds_ring = &recv_ctx->rds_rings[ring];
1146 index = qlcnic_get_sts_refhandle(sts_data0);
1147 length = qlcnic_get_sts_totallength(sts_data0);
1148 if (unlikely(index >= rds_ring->num_desc))
1151 cksum = qlcnic_get_sts_status(sts_data0);
1152 pkt_offset = qlcnic_get_sts_pkt_offset(sts_data0);
1154 skb = qlcnic_process_rxbuf(adapter, rds_ring, index, cksum);
1158 if (length > rds_ring->skb_size)
1159 skb_put(skb, rds_ring->skb_size);
1161 skb_put(skb, length);
1164 skb_pull(skb, pkt_offset);
1166 if (!qlcnic_check_loopback_buff(skb->data, adapter->mac_addr))
1167 adapter->ahw->diag_cnt++;
1169 dump_skb(skb, adapter);
1171 dev_kfree_skb_any(skb);
1172 adapter->stats.rx_pkts++;
1173 adapter->stats.rxbytes += length;
1178 void qlcnic_82xx_process_rcv_ring_diag(struct qlcnic_host_sds_ring *sds_ring)
1180 struct qlcnic_adapter *adapter = sds_ring->adapter;
1181 struct status_desc *desc;
1183 int ring, opcode, desc_cnt;
1185 u32 consumer = sds_ring->consumer;
1187 desc = &sds_ring->desc_head[consumer];
1188 sts_data0 = le64_to_cpu(desc->status_desc_data[0]);
1190 if (!(sts_data0 & STATUS_OWNER_HOST))
1193 desc_cnt = qlcnic_get_sts_desc_cnt(sts_data0);
1194 opcode = qlcnic_get_sts_opcode(sts_data0);
1196 case QLCNIC_RESPONSE_DESC:
1197 qlcnic_handle_fw_message(desc_cnt, consumer, sds_ring);
1200 ring = qlcnic_get_sts_type(sts_data0);
1201 qlcnic_process_rcv_diag(adapter, ring, sts_data0);
1205 for (; desc_cnt > 0; desc_cnt--) {
1206 desc = &sds_ring->desc_head[consumer];
1207 desc->status_desc_data[0] = cpu_to_le64(STATUS_OWNER_PHANTOM);
1208 consumer = get_next_index(consumer, sds_ring->num_desc);
1211 sds_ring->consumer = consumer;
1212 writel(consumer, sds_ring->crb_sts_consumer);
1215 int qlcnic_82xx_napi_add(struct qlcnic_adapter *adapter,
1216 struct net_device *netdev)
1218 int ring, max_sds_rings;
1219 struct qlcnic_host_sds_ring *sds_ring;
1220 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1222 if (qlcnic_alloc_sds_rings(recv_ctx, adapter->max_sds_rings))
1225 max_sds_rings = adapter->max_sds_rings;
1227 for (ring = 0; ring < adapter->max_sds_rings; ring++) {
1228 sds_ring = &recv_ctx->sds_rings[ring];
1230 if (ring == max_sds_rings - 1)
1231 netif_napi_add(netdev, &sds_ring->napi, qlcnic_poll,
1232 QLCNIC_NETDEV_WEIGHT / max_sds_rings);
1234 netif_napi_add(netdev, &sds_ring->napi, qlcnic_rx_poll,
1235 QLCNIC_NETDEV_WEIGHT*2);
1241 void qlcnic_napi_del(struct qlcnic_adapter *adapter)
1244 struct qlcnic_host_sds_ring *sds_ring;
1245 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1247 for (ring = 0; ring < adapter->max_sds_rings; ring++) {
1248 sds_ring = &recv_ctx->sds_rings[ring];
1249 netif_napi_del(&sds_ring->napi);
1252 qlcnic_free_sds_rings(adapter->recv_ctx);
1255 void qlcnic_82xx_napi_enable(struct qlcnic_adapter *adapter)
1258 struct qlcnic_host_sds_ring *sds_ring;
1259 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1261 if (adapter->is_up != QLCNIC_ADAPTER_UP_MAGIC)
1264 for (ring = 0; ring < adapter->max_sds_rings; ring++) {
1265 sds_ring = &recv_ctx->sds_rings[ring];
1266 napi_enable(&sds_ring->napi);
1267 qlcnic_enable_int(sds_ring);
1271 void qlcnic_82xx_napi_disable(struct qlcnic_adapter *adapter)
1274 struct qlcnic_host_sds_ring *sds_ring;
1275 struct qlcnic_recv_context *recv_ctx = adapter->recv_ctx;
1277 if (adapter->is_up != QLCNIC_ADAPTER_UP_MAGIC)
1280 for (ring = 0; ring < adapter->max_sds_rings; ring++) {
1281 sds_ring = &recv_ctx->sds_rings[ring];
1282 qlcnic_disable_int(sds_ring);
1283 napi_synchronize(&sds_ring->napi);
1284 napi_disable(&sds_ring->napi);