]>
Commit | Line | Data |
---|---|---|
c3e79baf AK |
1 | /* |
2 | * Huawei HiNIC PCI Express Linux driver | |
3 | * Copyright(c) 2017 Huawei Technologies Co., Ltd | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or modify it | |
6 | * under the terms and conditions of the GNU General Public License, | |
7 | * version 2, as published by the Free Software Foundation. | |
8 | * | |
9 | * This program is distributed in the hope it will be useful, but WITHOUT | |
10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
12 | * for more details. | |
13 | * | |
14 | */ | |
15 | ||
00e57a6d | 16 | #include <linux/kernel.h> |
c3e79baf AK |
17 | #include <linux/netdevice.h> |
18 | #include <linux/u64_stats_sync.h> | |
00e57a6d AK |
19 | #include <linux/errno.h> |
20 | #include <linux/types.h> | |
21 | #include <linux/pci.h> | |
22 | #include <linux/device.h> | |
23 | #include <linux/dma-mapping.h> | |
24 | #include <linux/slab.h> | |
25 | #include <linux/interrupt.h> | |
26 | #include <linux/skbuff.h> | |
27 | #include <linux/smp.h> | |
28 | #include <asm/byteorder.h> | |
49ea1963 ZC |
29 | #include <linux/ip.h> |
30 | #include <linux/tcp.h> | |
31 | #include <linux/sctp.h> | |
32 | #include <linux/ipv6.h> | |
33 | #include <net/ipv6.h> | |
34 | #include <net/checksum.h> | |
35 | #include <net/ip6_checksum.h> | |
c3e79baf | 36 | |
00e57a6d AK |
37 | #include "hinic_common.h" |
38 | #include "hinic_hw_if.h" | |
39 | #include "hinic_hw_wqe.h" | |
40 | #include "hinic_hw_wq.h" | |
c3e79baf | 41 | #include "hinic_hw_qp.h" |
00e57a6d AK |
42 | #include "hinic_hw_dev.h" |
43 | #include "hinic_dev.h" | |
c3e79baf AK |
44 | #include "hinic_tx.h" |
45 | ||
00e57a6d AK |
46 | #define TX_IRQ_NO_PENDING 0 |
47 | #define TX_IRQ_NO_COALESC 0 | |
48 | #define TX_IRQ_NO_LLI_TIMER 0 | |
49 | #define TX_IRQ_NO_CREDIT 0 | |
50 | #define TX_IRQ_NO_RESEND_TIMER 0 | |
51 | ||
52 | #define CI_UPDATE_NO_PENDING 0 | |
53 | #define CI_UPDATE_NO_COALESC 0 | |
54 | ||
49ea1963 | 55 | #define HW_CONS_IDX(sq) be16_to_cpu(*(u16 *)((sq)->hw_ci_addr)) |
00e57a6d | 56 | |
49ea1963 ZC |
57 | #define MIN_SKB_LEN 17 |
58 | ||
59 | #define MAX_PAYLOAD_OFFSET 221 | |
60 | #define TRANSPORT_OFFSET(l4_hdr, skb) ((u32)((l4_hdr) - (skb)->data)) | |
61 | ||
62 | union hinic_l3 { | |
63 | struct iphdr *v4; | |
64 | struct ipv6hdr *v6; | |
65 | unsigned char *hdr; | |
66 | }; | |
67 | ||
68 | union hinic_l4 { | |
69 | struct tcphdr *tcp; | |
70 | struct udphdr *udp; | |
71 | unsigned char *hdr; | |
72 | }; | |
73 | ||
74 | enum hinic_offload_type { | |
75 | TX_OFFLOAD_TSO = BIT(0), | |
76 | TX_OFFLOAD_CSUM = BIT(1), | |
77 | TX_OFFLOAD_VLAN = BIT(2), | |
78 | TX_OFFLOAD_INVALID = BIT(3), | |
79 | }; | |
00e57a6d | 80 | |
c3e79baf AK |
81 | /** |
82 | * hinic_txq_clean_stats - Clean the statistics of specific queue | |
83 | * @txq: Logical Tx Queue | |
84 | **/ | |
85 | void hinic_txq_clean_stats(struct hinic_txq *txq) | |
86 | { | |
87 | struct hinic_txq_stats *txq_stats = &txq->txq_stats; | |
88 | ||
89 | u64_stats_update_begin(&txq_stats->syncp); | |
90 | txq_stats->pkts = 0; | |
91 | txq_stats->bytes = 0; | |
92 | txq_stats->tx_busy = 0; | |
93 | txq_stats->tx_wake = 0; | |
94 | txq_stats->tx_dropped = 0; | |
95 | u64_stats_update_end(&txq_stats->syncp); | |
96 | } | |
97 | ||
edd384f6 AK |
98 | /** |
99 | * hinic_txq_get_stats - get statistics of Tx Queue | |
100 | * @txq: Logical Tx Queue | |
101 | * @stats: return updated stats here | |
102 | **/ | |
103 | void hinic_txq_get_stats(struct hinic_txq *txq, struct hinic_txq_stats *stats) | |
104 | { | |
105 | struct hinic_txq_stats *txq_stats = &txq->txq_stats; | |
106 | unsigned int start; | |
107 | ||
108 | u64_stats_update_begin(&stats->syncp); | |
109 | do { | |
110 | start = u64_stats_fetch_begin(&txq_stats->syncp); | |
111 | stats->pkts = txq_stats->pkts; | |
112 | stats->bytes = txq_stats->bytes; | |
113 | stats->tx_busy = txq_stats->tx_busy; | |
114 | stats->tx_wake = txq_stats->tx_wake; | |
115 | stats->tx_dropped = txq_stats->tx_dropped; | |
116 | } while (u64_stats_fetch_retry(&txq_stats->syncp, start)); | |
117 | u64_stats_update_end(&stats->syncp); | |
118 | } | |
119 | ||
c3e79baf AK |
120 | /** |
121 | * txq_stats_init - Initialize the statistics of specific queue | |
122 | * @txq: Logical Tx Queue | |
123 | **/ | |
124 | static void txq_stats_init(struct hinic_txq *txq) | |
125 | { | |
126 | struct hinic_txq_stats *txq_stats = &txq->txq_stats; | |
127 | ||
128 | u64_stats_init(&txq_stats->syncp); | |
129 | hinic_txq_clean_stats(txq); | |
130 | } | |
131 | ||
00e57a6d AK |
132 | /** |
133 | * tx_map_skb - dma mapping for skb and return sges | |
134 | * @nic_dev: nic device | |
135 | * @skb: the skb | |
136 | * @sges: returned sges | |
137 | * | |
138 | * Return 0 - Success, negative - Failure | |
139 | **/ | |
140 | static int tx_map_skb(struct hinic_dev *nic_dev, struct sk_buff *skb, | |
141 | struct hinic_sge *sges) | |
142 | { | |
143 | struct hinic_hwdev *hwdev = nic_dev->hwdev; | |
144 | struct hinic_hwif *hwif = hwdev->hwif; | |
145 | struct pci_dev *pdev = hwif->pdev; | |
146 | struct skb_frag_struct *frag; | |
147 | dma_addr_t dma_addr; | |
148 | int i, j; | |
149 | ||
150 | dma_addr = dma_map_single(&pdev->dev, skb->data, skb_headlen(skb), | |
151 | DMA_TO_DEVICE); | |
152 | if (dma_mapping_error(&pdev->dev, dma_addr)) { | |
153 | dev_err(&pdev->dev, "Failed to map Tx skb data\n"); | |
154 | return -EFAULT; | |
155 | } | |
156 | ||
157 | hinic_set_sge(&sges[0], dma_addr, skb_headlen(skb)); | |
158 | ||
159 | for (i = 0 ; i < skb_shinfo(skb)->nr_frags; i++) { | |
160 | frag = &skb_shinfo(skb)->frags[i]; | |
161 | ||
162 | dma_addr = skb_frag_dma_map(&pdev->dev, frag, 0, | |
163 | skb_frag_size(frag), | |
164 | DMA_TO_DEVICE); | |
165 | if (dma_mapping_error(&pdev->dev, dma_addr)) { | |
166 | dev_err(&pdev->dev, "Failed to map Tx skb frag\n"); | |
167 | goto err_tx_map; | |
168 | } | |
169 | ||
170 | hinic_set_sge(&sges[i + 1], dma_addr, skb_frag_size(frag)); | |
171 | } | |
172 | ||
173 | return 0; | |
174 | ||
175 | err_tx_map: | |
176 | for (j = 0; j < i; j++) | |
177 | dma_unmap_page(&pdev->dev, hinic_sge_to_dma(&sges[j + 1]), | |
178 | sges[j + 1].len, DMA_TO_DEVICE); | |
179 | ||
180 | dma_unmap_single(&pdev->dev, hinic_sge_to_dma(&sges[0]), sges[0].len, | |
181 | DMA_TO_DEVICE); | |
182 | return -EFAULT; | |
183 | } | |
184 | ||
185 | /** | |
186 | * tx_unmap_skb - unmap the dma address of the skb | |
187 | * @nic_dev: nic device | |
188 | * @skb: the skb | |
189 | * @sges: the sges that are connected to the skb | |
190 | **/ | |
191 | static void tx_unmap_skb(struct hinic_dev *nic_dev, struct sk_buff *skb, | |
192 | struct hinic_sge *sges) | |
193 | { | |
194 | struct hinic_hwdev *hwdev = nic_dev->hwdev; | |
195 | struct hinic_hwif *hwif = hwdev->hwif; | |
196 | struct pci_dev *pdev = hwif->pdev; | |
197 | int i; | |
198 | ||
199 | for (i = 0; i < skb_shinfo(skb)->nr_frags ; i++) | |
200 | dma_unmap_page(&pdev->dev, hinic_sge_to_dma(&sges[i + 1]), | |
201 | sges[i + 1].len, DMA_TO_DEVICE); | |
202 | ||
203 | dma_unmap_single(&pdev->dev, hinic_sge_to_dma(&sges[0]), sges[0].len, | |
204 | DMA_TO_DEVICE); | |
205 | } | |
206 | ||
49ea1963 ZC |
207 | static void get_inner_l3_l4_type(struct sk_buff *skb, union hinic_l3 *ip, |
208 | union hinic_l4 *l4, | |
209 | enum hinic_offload_type offload_type, | |
210 | enum hinic_l3_offload_type *l3_type, | |
211 | u8 *l4_proto) | |
212 | { | |
213 | u8 *exthdr; | |
214 | ||
215 | if (ip->v4->version == 4) { | |
216 | *l3_type = (offload_type == TX_OFFLOAD_CSUM) ? | |
217 | IPV4_PKT_NO_CHKSUM_OFFLOAD : | |
218 | IPV4_PKT_WITH_CHKSUM_OFFLOAD; | |
219 | *l4_proto = ip->v4->protocol; | |
220 | } else if (ip->v4->version == 6) { | |
221 | *l3_type = IPV6_PKT; | |
222 | exthdr = ip->hdr + sizeof(*ip->v6); | |
223 | *l4_proto = ip->v6->nexthdr; | |
224 | if (exthdr != l4->hdr) { | |
225 | int start = exthdr - skb->data; | |
226 | __be16 frag_off; | |
227 | ||
228 | ipv6_skip_exthdr(skb, start, l4_proto, &frag_off); | |
229 | } | |
230 | } else { | |
231 | *l3_type = L3TYPE_UNKNOWN; | |
232 | *l4_proto = 0; | |
233 | } | |
234 | } | |
235 | ||
236 | static void get_inner_l4_info(struct sk_buff *skb, union hinic_l4 *l4, | |
237 | enum hinic_offload_type offload_type, u8 l4_proto, | |
238 | enum hinic_l4_offload_type *l4_offload, | |
239 | u32 *l4_len, u32 *offset) | |
240 | { | |
241 | *l4_offload = OFFLOAD_DISABLE; | |
242 | *offset = 0; | |
243 | *l4_len = 0; | |
244 | ||
245 | switch (l4_proto) { | |
246 | case IPPROTO_TCP: | |
247 | *l4_offload = TCP_OFFLOAD_ENABLE; | |
248 | /* doff in unit of 4B */ | |
249 | *l4_len = l4->tcp->doff * 4; | |
250 | *offset = *l4_len + TRANSPORT_OFFSET(l4->hdr, skb); | |
251 | break; | |
252 | ||
253 | case IPPROTO_UDP: | |
254 | *l4_offload = UDP_OFFLOAD_ENABLE; | |
255 | *l4_len = sizeof(struct udphdr); | |
256 | *offset = TRANSPORT_OFFSET(l4->hdr, skb); | |
257 | break; | |
258 | ||
259 | case IPPROTO_SCTP: | |
260 | /* only csum offload support sctp */ | |
261 | if (offload_type != TX_OFFLOAD_CSUM) | |
262 | break; | |
263 | ||
264 | *l4_offload = SCTP_OFFLOAD_ENABLE; | |
265 | *l4_len = sizeof(struct sctphdr); | |
266 | *offset = TRANSPORT_OFFSET(l4->hdr, skb); | |
267 | break; | |
268 | ||
269 | default: | |
270 | break; | |
271 | } | |
272 | } | |
273 | ||
274 | static __sum16 csum_magic(union hinic_l3 *ip, unsigned short proto) | |
275 | { | |
276 | return (ip->v4->version == 4) ? | |
277 | csum_tcpudp_magic(ip->v4->saddr, ip->v4->daddr, 0, proto, 0) : | |
278 | csum_ipv6_magic(&ip->v6->saddr, &ip->v6->daddr, 0, proto, 0); | |
279 | } | |
280 | ||
281 | static int offload_tso(struct hinic_sq_task *task, u32 *queue_info, | |
282 | struct sk_buff *skb) | |
283 | { | |
284 | u32 offset, l4_len, ip_identify, network_hdr_len; | |
285 | enum hinic_l3_offload_type l3_offload; | |
286 | enum hinic_l4_offload_type l4_offload; | |
287 | union hinic_l3 ip; | |
288 | union hinic_l4 l4; | |
289 | u8 l4_proto; | |
290 | ||
291 | if (!skb_is_gso(skb)) | |
292 | return 0; | |
293 | ||
294 | if (skb_cow_head(skb, 0) < 0) | |
295 | return -EPROTONOSUPPORT; | |
296 | ||
297 | if (skb->encapsulation) { | |
298 | u32 gso_type = skb_shinfo(skb)->gso_type; | |
299 | u32 tunnel_type = 0; | |
300 | u32 l4_tunnel_len; | |
301 | ||
302 | ip.hdr = skb_network_header(skb); | |
303 | l4.hdr = skb_transport_header(skb); | |
304 | network_hdr_len = skb_inner_network_header_len(skb); | |
305 | ||
306 | if (ip.v4->version == 4) { | |
307 | ip.v4->tot_len = 0; | |
308 | l3_offload = IPV4_PKT_WITH_CHKSUM_OFFLOAD; | |
309 | } else if (ip.v4->version == 6) { | |
310 | l3_offload = IPV6_PKT; | |
311 | } else { | |
312 | l3_offload = 0; | |
313 | } | |
314 | ||
315 | hinic_task_set_outter_l3(task, l3_offload, | |
316 | skb_network_header_len(skb)); | |
317 | ||
318 | if (gso_type & SKB_GSO_UDP_TUNNEL_CSUM) { | |
319 | l4.udp->check = ~csum_magic(&ip, IPPROTO_UDP); | |
320 | tunnel_type = TUNNEL_UDP_CSUM; | |
321 | } else if (gso_type & SKB_GSO_UDP_TUNNEL) { | |
322 | tunnel_type = TUNNEL_UDP_NO_CSUM; | |
323 | } | |
324 | ||
325 | l4_tunnel_len = skb_inner_network_offset(skb) - | |
326 | skb_transport_offset(skb); | |
327 | hinic_task_set_tunnel_l4(task, tunnel_type, l4_tunnel_len); | |
328 | ||
329 | ip.hdr = skb_inner_network_header(skb); | |
330 | l4.hdr = skb_inner_transport_header(skb); | |
331 | } else { | |
332 | ip.hdr = skb_network_header(skb); | |
333 | l4.hdr = skb_transport_header(skb); | |
334 | network_hdr_len = skb_network_header_len(skb); | |
335 | } | |
336 | ||
337 | /* initialize inner IP header fields */ | |
338 | if (ip.v4->version == 4) | |
339 | ip.v4->tot_len = 0; | |
340 | else | |
341 | ip.v6->payload_len = 0; | |
342 | ||
343 | get_inner_l3_l4_type(skb, &ip, &l4, TX_OFFLOAD_TSO, &l3_offload, | |
344 | &l4_proto); | |
345 | ||
346 | hinic_task_set_inner_l3(task, l3_offload, network_hdr_len); | |
347 | ||
348 | ip_identify = 0; | |
349 | if (l4_proto == IPPROTO_TCP) | |
350 | l4.tcp->check = ~csum_magic(&ip, IPPROTO_TCP); | |
351 | ||
352 | get_inner_l4_info(skb, &l4, TX_OFFLOAD_TSO, l4_proto, &l4_offload, | |
353 | &l4_len, &offset); | |
354 | ||
355 | hinic_set_tso_inner_l4(task, queue_info, l4_offload, l4_len, offset, | |
356 | ip_identify, skb_shinfo(skb)->gso_size); | |
357 | ||
358 | return 1; | |
359 | } | |
360 | ||
361 | static int offload_csum(struct hinic_sq_task *task, u32 *queue_info, | |
362 | struct sk_buff *skb) | |
363 | { | |
364 | enum hinic_l4_offload_type l4_offload; | |
365 | u32 offset, l4_len, network_hdr_len; | |
366 | enum hinic_l3_offload_type l3_type; | |
367 | union hinic_l3 ip; | |
368 | union hinic_l4 l4; | |
369 | u8 l4_proto; | |
370 | ||
371 | if (skb->ip_summed != CHECKSUM_PARTIAL) | |
372 | return 0; | |
373 | ||
374 | if (skb->encapsulation) { | |
375 | u32 l4_tunnel_len; | |
376 | ||
377 | ip.hdr = skb_network_header(skb); | |
378 | ||
379 | if (ip.v4->version == 4) | |
380 | l3_type = IPV4_PKT_NO_CHKSUM_OFFLOAD; | |
381 | else if (ip.v4->version == 6) | |
382 | l3_type = IPV6_PKT; | |
383 | else | |
384 | l3_type = L3TYPE_UNKNOWN; | |
385 | ||
386 | hinic_task_set_outter_l3(task, l3_type, | |
387 | skb_network_header_len(skb)); | |
388 | ||
389 | l4_tunnel_len = skb_inner_network_offset(skb) - | |
390 | skb_transport_offset(skb); | |
391 | ||
392 | hinic_task_set_tunnel_l4(task, TUNNEL_UDP_NO_CSUM, | |
393 | l4_tunnel_len); | |
394 | ||
395 | ip.hdr = skb_inner_network_header(skb); | |
396 | l4.hdr = skb_inner_transport_header(skb); | |
397 | network_hdr_len = skb_inner_network_header_len(skb); | |
398 | } else { | |
399 | ip.hdr = skb_network_header(skb); | |
400 | l4.hdr = skb_transport_header(skb); | |
401 | network_hdr_len = skb_network_header_len(skb); | |
402 | } | |
403 | ||
404 | get_inner_l3_l4_type(skb, &ip, &l4, TX_OFFLOAD_CSUM, &l3_type, | |
405 | &l4_proto); | |
406 | ||
407 | hinic_task_set_inner_l3(task, l3_type, network_hdr_len); | |
408 | ||
409 | get_inner_l4_info(skb, &l4, TX_OFFLOAD_CSUM, l4_proto, &l4_offload, | |
410 | &l4_len, &offset); | |
411 | ||
412 | hinic_set_cs_inner_l4(task, queue_info, l4_offload, l4_len, offset); | |
413 | ||
414 | return 1; | |
415 | } | |
416 | ||
417 | static int hinic_tx_offload(struct sk_buff *skb, struct hinic_sq_task *task, | |
418 | u32 *queue_info) | |
419 | { | |
420 | enum hinic_offload_type offload = 0; | |
421 | int enabled; | |
422 | ||
423 | enabled = offload_tso(task, queue_info, skb); | |
424 | if (enabled > 0) { | |
425 | offload |= TX_OFFLOAD_TSO; | |
426 | } else if (enabled == 0) { | |
427 | enabled = offload_csum(task, queue_info, skb); | |
428 | if (enabled) | |
429 | offload |= TX_OFFLOAD_CSUM; | |
430 | } else { | |
431 | return -EPROTONOSUPPORT; | |
432 | } | |
433 | ||
434 | if (offload) | |
435 | hinic_task_set_l2hdr(task, skb_network_offset(skb)); | |
436 | ||
437 | /* payload offset should not more than 221 */ | |
438 | if (HINIC_SQ_CTRL_GET(*queue_info, QUEUE_INFO_PLDOFF) > | |
439 | MAX_PAYLOAD_OFFSET) { | |
440 | return -EPROTONOSUPPORT; | |
441 | } | |
442 | ||
443 | /* mss should not less than 80 */ | |
444 | if (HINIC_SQ_CTRL_GET(*queue_info, QUEUE_INFO_MSS) < HINIC_MSS_MIN) { | |
445 | *queue_info = HINIC_SQ_CTRL_CLEAR(*queue_info, QUEUE_INFO_MSS); | |
446 | *queue_info |= HINIC_SQ_CTRL_SET(HINIC_MSS_MIN, QUEUE_INFO_MSS); | |
447 | } | |
448 | ||
449 | return 0; | |
450 | } | |
451 | ||
00e57a6d AK |
452 | netdev_tx_t hinic_xmit_frame(struct sk_buff *skb, struct net_device *netdev) |
453 | { | |
454 | struct hinic_dev *nic_dev = netdev_priv(netdev); | |
49ea1963 | 455 | u16 prod_idx, q_id = skb->queue_mapping; |
00e57a6d AK |
456 | struct netdev_queue *netdev_txq; |
457 | int nr_sges, err = NETDEV_TX_OK; | |
458 | struct hinic_sq_wqe *sq_wqe; | |
459 | unsigned int wqe_size; | |
460 | struct hinic_txq *txq; | |
461 | struct hinic_qp *qp; | |
00e57a6d | 462 | |
49ea1963 | 463 | txq = &nic_dev->txqs[q_id]; |
00e57a6d AK |
464 | qp = container_of(txq->sq, struct hinic_qp, sq); |
465 | ||
466 | if (skb->len < MIN_SKB_LEN) { | |
467 | if (skb_pad(skb, MIN_SKB_LEN - skb->len)) { | |
468 | netdev_err(netdev, "Failed to pad skb\n"); | |
7d8697af | 469 | goto update_error_stats; |
00e57a6d AK |
470 | } |
471 | ||
472 | skb->len = MIN_SKB_LEN; | |
473 | } | |
474 | ||
475 | nr_sges = skb_shinfo(skb)->nr_frags + 1; | |
476 | if (nr_sges > txq->max_sges) { | |
477 | netdev_err(netdev, "Too many Tx sges\n"); | |
478 | goto skb_error; | |
479 | } | |
480 | ||
481 | err = tx_map_skb(nic_dev, skb, txq->sges); | |
482 | if (err) | |
483 | goto skb_error; | |
484 | ||
485 | wqe_size = HINIC_SQ_WQE_SIZE(nr_sges); | |
486 | ||
487 | sq_wqe = hinic_sq_get_wqe(txq->sq, wqe_size, &prod_idx); | |
488 | if (!sq_wqe) { | |
00e57a6d AK |
489 | netif_stop_subqueue(netdev, qp->q_id); |
490 | ||
bbdc9e68 AK |
491 | /* Check for the case free_tx_poll is called in another cpu |
492 | * and we stopped the subqueue after free_tx_poll check. | |
493 | */ | |
494 | sq_wqe = hinic_sq_get_wqe(txq->sq, wqe_size, &prod_idx); | |
495 | if (sq_wqe) { | |
496 | netif_wake_subqueue(nic_dev->netdev, qp->q_id); | |
497 | goto process_sq_wqe; | |
498 | } | |
499 | ||
500 | tx_unmap_skb(nic_dev, skb, txq->sges); | |
501 | ||
00e57a6d AK |
502 | u64_stats_update_begin(&txq->txq_stats.syncp); |
503 | txq->txq_stats.tx_busy++; | |
504 | u64_stats_update_end(&txq->txq_stats.syncp); | |
505 | err = NETDEV_TX_BUSY; | |
dc9cf390 | 506 | wqe_size = 0; |
00e57a6d AK |
507 | goto flush_skbs; |
508 | } | |
509 | ||
bbdc9e68 | 510 | process_sq_wqe: |
00e57a6d AK |
511 | hinic_sq_prepare_wqe(txq->sq, prod_idx, sq_wqe, txq->sges, nr_sges); |
512 | ||
49ea1963 ZC |
513 | err = hinic_tx_offload(skb, &sq_wqe->task, &sq_wqe->ctrl.queue_info); |
514 | if (err) | |
515 | goto offload_error; | |
516 | ||
00e57a6d AK |
517 | hinic_sq_write_wqe(txq->sq, prod_idx, sq_wqe, skb, wqe_size); |
518 | ||
519 | flush_skbs: | |
49ea1963 | 520 | netdev_txq = netdev_get_tx_queue(netdev, q_id); |
00e57a6d AK |
521 | if ((!skb->xmit_more) || (netif_xmit_stopped(netdev_txq))) |
522 | hinic_sq_write_db(txq->sq, prod_idx, wqe_size, 0); | |
523 | ||
524 | return err; | |
525 | ||
49ea1963 ZC |
526 | offload_error: |
527 | hinic_sq_return_wqe(txq->sq, wqe_size); | |
528 | tx_unmap_skb(nic_dev, skb, txq->sges); | |
529 | ||
00e57a6d AK |
530 | skb_error: |
531 | dev_kfree_skb_any(skb); | |
532 | ||
7d8697af | 533 | update_error_stats: |
00e57a6d AK |
534 | u64_stats_update_begin(&txq->txq_stats.syncp); |
535 | txq->txq_stats.tx_dropped++; | |
536 | u64_stats_update_end(&txq->txq_stats.syncp); | |
49ea1963 ZC |
537 | |
538 | return NETDEV_TX_OK; | |
00e57a6d AK |
539 | } |
540 | ||
541 | /** | |
542 | * tx_free_skb - unmap and free skb | |
543 | * @nic_dev: nic device | |
544 | * @skb: the skb | |
545 | * @sges: the sges that are connected to the skb | |
546 | **/ | |
547 | static void tx_free_skb(struct hinic_dev *nic_dev, struct sk_buff *skb, | |
548 | struct hinic_sge *sges) | |
549 | { | |
550 | tx_unmap_skb(nic_dev, skb, sges); | |
551 | ||
552 | dev_kfree_skb_any(skb); | |
553 | } | |
554 | ||
555 | /** | |
556 | * free_all_rx_skbs - free all skbs in tx queue | |
557 | * @txq: tx queue | |
558 | **/ | |
559 | static void free_all_tx_skbs(struct hinic_txq *txq) | |
560 | { | |
561 | struct hinic_dev *nic_dev = netdev_priv(txq->netdev); | |
562 | struct hinic_sq *sq = txq->sq; | |
563 | struct hinic_sq_wqe *sq_wqe; | |
564 | unsigned int wqe_size; | |
565 | struct sk_buff *skb; | |
566 | int nr_sges; | |
567 | u16 ci; | |
568 | ||
4451ea53 ZC |
569 | while ((sq_wqe = hinic_sq_read_wqebb(sq, &skb, &wqe_size, &ci))) { |
570 | sq_wqe = hinic_sq_read_wqe(sq, &skb, wqe_size, &ci); | |
571 | if (!sq_wqe) | |
572 | break; | |
573 | ||
00e57a6d AK |
574 | nr_sges = skb_shinfo(skb)->nr_frags + 1; |
575 | ||
576 | hinic_sq_get_sges(sq_wqe, txq->free_sges, nr_sges); | |
577 | ||
578 | hinic_sq_put_wqe(sq, wqe_size); | |
579 | ||
580 | tx_free_skb(nic_dev, skb, txq->free_sges); | |
581 | } | |
582 | } | |
583 | ||
584 | /** | |
585 | * free_tx_poll - free finished tx skbs in tx queue that connected to napi | |
586 | * @napi: napi | |
587 | * @budget: number of tx | |
588 | * | |
589 | * Return 0 - Success, negative - Failure | |
590 | **/ | |
591 | static int free_tx_poll(struct napi_struct *napi, int budget) | |
592 | { | |
593 | struct hinic_txq *txq = container_of(napi, struct hinic_txq, napi); | |
594 | struct hinic_qp *qp = container_of(txq->sq, struct hinic_qp, sq); | |
595 | struct hinic_dev *nic_dev = netdev_priv(txq->netdev); | |
596 | struct netdev_queue *netdev_txq; | |
597 | struct hinic_sq *sq = txq->sq; | |
598 | struct hinic_wq *wq = sq->wq; | |
599 | struct hinic_sq_wqe *sq_wqe; | |
600 | unsigned int wqe_size; | |
601 | int nr_sges, pkts = 0; | |
602 | struct sk_buff *skb; | |
603 | u64 tx_bytes = 0; | |
604 | u16 hw_ci, sw_ci; | |
605 | ||
606 | do { | |
607 | hw_ci = HW_CONS_IDX(sq) & wq->mask; | |
608 | ||
4451ea53 ZC |
609 | /* Reading a WQEBB to get real WQE size and consumer index. */ |
610 | sq_wqe = hinic_sq_read_wqebb(sq, &skb, &wqe_size, &sw_ci); | |
00e57a6d AK |
611 | if ((!sq_wqe) || |
612 | (((hw_ci - sw_ci) & wq->mask) * wq->wqebb_size < wqe_size)) | |
613 | break; | |
614 | ||
4451ea53 ZC |
615 | /* If this WQE have multiple WQEBBs, we will read again to get |
616 | * full size WQE. | |
617 | */ | |
618 | if (wqe_size > wq->wqebb_size) { | |
619 | sq_wqe = hinic_sq_read_wqe(sq, &skb, wqe_size, &sw_ci); | |
620 | if (unlikely(!sq_wqe)) | |
621 | break; | |
622 | } | |
623 | ||
00e57a6d AK |
624 | tx_bytes += skb->len; |
625 | pkts++; | |
626 | ||
627 | nr_sges = skb_shinfo(skb)->nr_frags + 1; | |
628 | ||
629 | hinic_sq_get_sges(sq_wqe, txq->free_sges, nr_sges); | |
630 | ||
631 | hinic_sq_put_wqe(sq, wqe_size); | |
632 | ||
633 | tx_free_skb(nic_dev, skb, txq->free_sges); | |
634 | } while (pkts < budget); | |
635 | ||
636 | if (__netif_subqueue_stopped(nic_dev->netdev, qp->q_id) && | |
637 | hinic_get_sq_free_wqebbs(sq) >= HINIC_MIN_TX_NUM_WQEBBS(sq)) { | |
638 | netdev_txq = netdev_get_tx_queue(txq->netdev, qp->q_id); | |
639 | ||
640 | __netif_tx_lock(netdev_txq, smp_processor_id()); | |
641 | ||
642 | netif_wake_subqueue(nic_dev->netdev, qp->q_id); | |
643 | ||
644 | __netif_tx_unlock(netdev_txq); | |
645 | ||
646 | u64_stats_update_begin(&txq->txq_stats.syncp); | |
647 | txq->txq_stats.tx_wake++; | |
648 | u64_stats_update_end(&txq->txq_stats.syncp); | |
649 | } | |
650 | ||
651 | u64_stats_update_begin(&txq->txq_stats.syncp); | |
652 | txq->txq_stats.bytes += tx_bytes; | |
653 | txq->txq_stats.pkts += pkts; | |
654 | u64_stats_update_end(&txq->txq_stats.syncp); | |
655 | ||
656 | if (pkts < budget) { | |
657 | napi_complete(napi); | |
6a044c3d XC |
658 | hinic_hwdev_set_msix_state(nic_dev->hwdev, |
659 | sq->msix_entry, | |
660 | HINIC_MSIX_ENABLE); | |
00e57a6d AK |
661 | return pkts; |
662 | } | |
663 | ||
664 | return budget; | |
665 | } | |
666 | ||
667 | static void tx_napi_add(struct hinic_txq *txq, int weight) | |
668 | { | |
669 | netif_napi_add(txq->netdev, &txq->napi, free_tx_poll, weight); | |
670 | napi_enable(&txq->napi); | |
671 | } | |
672 | ||
673 | static void tx_napi_del(struct hinic_txq *txq) | |
674 | { | |
675 | napi_disable(&txq->napi); | |
676 | netif_napi_del(&txq->napi); | |
677 | } | |
678 | ||
679 | static irqreturn_t tx_irq(int irq, void *data) | |
680 | { | |
681 | struct hinic_txq *txq = data; | |
682 | struct hinic_dev *nic_dev; | |
683 | ||
684 | nic_dev = netdev_priv(txq->netdev); | |
685 | ||
686 | /* Disable the interrupt until napi will be completed */ | |
6a044c3d XC |
687 | hinic_hwdev_set_msix_state(nic_dev->hwdev, |
688 | txq->sq->msix_entry, | |
689 | HINIC_MSIX_DISABLE); | |
00e57a6d AK |
690 | |
691 | hinic_hwdev_msix_cnt_set(nic_dev->hwdev, txq->sq->msix_entry); | |
692 | ||
693 | napi_schedule(&txq->napi); | |
694 | return IRQ_HANDLED; | |
695 | } | |
696 | ||
697 | static int tx_request_irq(struct hinic_txq *txq) | |
698 | { | |
699 | struct hinic_dev *nic_dev = netdev_priv(txq->netdev); | |
700 | struct hinic_hwdev *hwdev = nic_dev->hwdev; | |
701 | struct hinic_hwif *hwif = hwdev->hwif; | |
702 | struct pci_dev *pdev = hwif->pdev; | |
703 | struct hinic_sq *sq = txq->sq; | |
704 | int err; | |
705 | ||
706 | tx_napi_add(txq, nic_dev->tx_weight); | |
707 | ||
708 | hinic_hwdev_msix_set(nic_dev->hwdev, sq->msix_entry, | |
709 | TX_IRQ_NO_PENDING, TX_IRQ_NO_COALESC, | |
710 | TX_IRQ_NO_LLI_TIMER, TX_IRQ_NO_CREDIT, | |
711 | TX_IRQ_NO_RESEND_TIMER); | |
712 | ||
713 | err = request_irq(sq->irq, tx_irq, 0, txq->irq_name, txq); | |
714 | if (err) { | |
715 | dev_err(&pdev->dev, "Failed to request Tx irq\n"); | |
716 | tx_napi_del(txq); | |
717 | return err; | |
718 | } | |
719 | ||
720 | return 0; | |
721 | } | |
722 | ||
723 | static void tx_free_irq(struct hinic_txq *txq) | |
724 | { | |
725 | struct hinic_sq *sq = txq->sq; | |
726 | ||
727 | free_irq(sq->irq, txq); | |
728 | tx_napi_del(txq); | |
729 | } | |
730 | ||
c3e79baf AK |
731 | /** |
732 | * hinic_init_txq - Initialize the Tx Queue | |
733 | * @txq: Logical Tx Queue | |
734 | * @sq: Hardware Tx Queue to connect the Logical queue with | |
735 | * @netdev: network device to connect the Logical queue with | |
736 | * | |
737 | * Return 0 - Success, negative - Failure | |
738 | **/ | |
739 | int hinic_init_txq(struct hinic_txq *txq, struct hinic_sq *sq, | |
740 | struct net_device *netdev) | |
741 | { | |
00e57a6d AK |
742 | struct hinic_qp *qp = container_of(sq, struct hinic_qp, sq); |
743 | struct hinic_dev *nic_dev = netdev_priv(netdev); | |
744 | struct hinic_hwdev *hwdev = nic_dev->hwdev; | |
745 | int err, irqname_len; | |
746 | size_t sges_size; | |
747 | ||
c3e79baf AK |
748 | txq->netdev = netdev; |
749 | txq->sq = sq; | |
750 | ||
751 | txq_stats_init(txq); | |
00e57a6d AK |
752 | |
753 | txq->max_sges = HINIC_MAX_SQ_BUFDESCS; | |
754 | ||
755 | sges_size = txq->max_sges * sizeof(*txq->sges); | |
756 | txq->sges = devm_kzalloc(&netdev->dev, sges_size, GFP_KERNEL); | |
757 | if (!txq->sges) | |
758 | return -ENOMEM; | |
759 | ||
760 | sges_size = txq->max_sges * sizeof(*txq->free_sges); | |
761 | txq->free_sges = devm_kzalloc(&netdev->dev, sges_size, GFP_KERNEL); | |
762 | if (!txq->free_sges) { | |
763 | err = -ENOMEM; | |
764 | goto err_alloc_free_sges; | |
765 | } | |
766 | ||
767 | irqname_len = snprintf(NULL, 0, "hinic_txq%d", qp->q_id) + 1; | |
768 | txq->irq_name = devm_kzalloc(&netdev->dev, irqname_len, GFP_KERNEL); | |
769 | if (!txq->irq_name) { | |
770 | err = -ENOMEM; | |
771 | goto err_alloc_irqname; | |
772 | } | |
773 | ||
774 | sprintf(txq->irq_name, "hinic_txq%d", qp->q_id); | |
775 | ||
776 | err = hinic_hwdev_hw_ci_addr_set(hwdev, sq, CI_UPDATE_NO_PENDING, | |
777 | CI_UPDATE_NO_COALESC); | |
778 | if (err) | |
779 | goto err_hw_ci; | |
780 | ||
781 | err = tx_request_irq(txq); | |
782 | if (err) { | |
783 | netdev_err(netdev, "Failed to request Tx irq\n"); | |
784 | goto err_req_tx_irq; | |
785 | } | |
786 | ||
c3e79baf | 787 | return 0; |
00e57a6d AK |
788 | |
789 | err_req_tx_irq: | |
790 | err_hw_ci: | |
791 | devm_kfree(&netdev->dev, txq->irq_name); | |
792 | ||
793 | err_alloc_irqname: | |
794 | devm_kfree(&netdev->dev, txq->free_sges); | |
795 | ||
796 | err_alloc_free_sges: | |
797 | devm_kfree(&netdev->dev, txq->sges); | |
798 | return err; | |
c3e79baf AK |
799 | } |
800 | ||
801 | /** | |
802 | * hinic_clean_txq - Clean the Tx Queue | |
803 | * @txq: Logical Tx Queue | |
804 | **/ | |
805 | void hinic_clean_txq(struct hinic_txq *txq) | |
806 | { | |
00e57a6d AK |
807 | struct net_device *netdev = txq->netdev; |
808 | ||
809 | tx_free_irq(txq); | |
810 | ||
811 | free_all_tx_skbs(txq); | |
812 | ||
813 | devm_kfree(&netdev->dev, txq->irq_name); | |
814 | devm_kfree(&netdev->dev, txq->free_sges); | |
815 | devm_kfree(&netdev->dev, txq->sges); | |
c3e79baf | 816 | } |