1
2
3
4#include <linux/inetdevice.h>
5#include <linux/etherdevice.h>
6#include <linux/ethtool.h>
7#include <linux/mm.h>
8
9#include <net/checksum.h>
10#include <net/ip6_checksum.h>
11
12#include "mana.h"
13
14
15
16static int mana_open(struct net_device *ndev)
17{
18 struct mana_port_context *apc = netdev_priv(ndev);
19 int err;
20
21 err = mana_alloc_queues(ndev);
22 if (err)
23 return err;
24
25 apc->port_is_up = true;
26
27
28 smp_wmb();
29
30 netif_carrier_on(ndev);
31 netif_tx_wake_all_queues(ndev);
32
33 return 0;
34}
35
36static int mana_close(struct net_device *ndev)
37{
38 struct mana_port_context *apc = netdev_priv(ndev);
39
40 if (!apc->port_is_up)
41 return 0;
42
43 return mana_detach(ndev, true);
44}
45
46static bool mana_can_tx(struct gdma_queue *wq)
47{
48 return mana_gd_wq_avail_space(wq) >= MAX_TX_WQE_SIZE;
49}
50
51static unsigned int mana_checksum_info(struct sk_buff *skb)
52{
53 if (skb->protocol == htons(ETH_P_IP)) {
54 struct iphdr *ip = ip_hdr(skb);
55
56 if (ip->protocol == IPPROTO_TCP)
57 return IPPROTO_TCP;
58
59 if (ip->protocol == IPPROTO_UDP)
60 return IPPROTO_UDP;
61 } else if (skb->protocol == htons(ETH_P_IPV6)) {
62 struct ipv6hdr *ip6 = ipv6_hdr(skb);
63
64 if (ip6->nexthdr == IPPROTO_TCP)
65 return IPPROTO_TCP;
66
67 if (ip6->nexthdr == IPPROTO_UDP)
68 return IPPROTO_UDP;
69 }
70
71
72 return 0;
73}
74
75static int mana_map_skb(struct sk_buff *skb, struct mana_port_context *apc,
76 struct mana_tx_package *tp)
77{
78 struct mana_skb_head *ash = (struct mana_skb_head *)skb->head;
79 struct gdma_dev *gd = apc->ac->gdma_dev;
80 struct gdma_context *gc;
81 struct device *dev;
82 skb_frag_t *frag;
83 dma_addr_t da;
84 int i;
85
86 gc = gd->gdma_context;
87 dev = gc->dev;
88 da = dma_map_single(dev, skb->data, skb_headlen(skb), DMA_TO_DEVICE);
89
90 if (dma_mapping_error(dev, da))
91 return -ENOMEM;
92
93 ash->dma_handle[0] = da;
94 ash->size[0] = skb_headlen(skb);
95
96 tp->wqe_req.sgl[0].address = ash->dma_handle[0];
97 tp->wqe_req.sgl[0].mem_key = gd->gpa_mkey;
98 tp->wqe_req.sgl[0].size = ash->size[0];
99
100 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
101 frag = &skb_shinfo(skb)->frags[i];
102 da = skb_frag_dma_map(dev, frag, 0, skb_frag_size(frag),
103 DMA_TO_DEVICE);
104
105 if (dma_mapping_error(dev, da))
106 goto frag_err;
107
108 ash->dma_handle[i + 1] = da;
109 ash->size[i + 1] = skb_frag_size(frag);
110
111 tp->wqe_req.sgl[i + 1].address = ash->dma_handle[i + 1];
112 tp->wqe_req.sgl[i + 1].mem_key = gd->gpa_mkey;
113 tp->wqe_req.sgl[i + 1].size = ash->size[i + 1];
114 }
115
116 return 0;
117
118frag_err:
119 for (i = i - 1; i >= 0; i--)
120 dma_unmap_page(dev, ash->dma_handle[i + 1], ash->size[i + 1],
121 DMA_TO_DEVICE);
122
123 dma_unmap_single(dev, ash->dma_handle[0], ash->size[0], DMA_TO_DEVICE);
124
125 return -ENOMEM;
126}
127
128static int mana_start_xmit(struct sk_buff *skb, struct net_device *ndev)
129{
130 enum mana_tx_pkt_format pkt_fmt = MANA_SHORT_PKT_FMT;
131 struct mana_port_context *apc = netdev_priv(ndev);
132 u16 txq_idx = skb_get_queue_mapping(skb);
133 struct gdma_dev *gd = apc->ac->gdma_dev;
134 bool ipv4 = false, ipv6 = false;
135 struct mana_tx_package pkg = {};
136 struct netdev_queue *net_txq;
137 struct mana_stats *tx_stats;
138 struct gdma_queue *gdma_sq;
139 unsigned int csum_type;
140 struct mana_txq *txq;
141 struct mana_cq *cq;
142 int err, len;
143
144 if (unlikely(!apc->port_is_up))
145 goto tx_drop;
146
147 if (skb_cow_head(skb, MANA_HEADROOM))
148 goto tx_drop_count;
149
150 txq = &apc->tx_qp[txq_idx].txq;
151 gdma_sq = txq->gdma_sq;
152 cq = &apc->tx_qp[txq_idx].tx_cq;
153
154 pkg.tx_oob.s_oob.vcq_num = cq->gdma_id;
155 pkg.tx_oob.s_oob.vsq_frame = txq->vsq_frame;
156
157 if (txq->vp_offset > MANA_SHORT_VPORT_OFFSET_MAX) {
158 pkg.tx_oob.l_oob.long_vp_offset = txq->vp_offset;
159 pkt_fmt = MANA_LONG_PKT_FMT;
160 } else {
161 pkg.tx_oob.s_oob.short_vp_offset = txq->vp_offset;
162 }
163
164 pkg.tx_oob.s_oob.pkt_fmt = pkt_fmt;
165
166 if (pkt_fmt == MANA_SHORT_PKT_FMT)
167 pkg.wqe_req.inline_oob_size = sizeof(struct mana_tx_short_oob);
168 else
169 pkg.wqe_req.inline_oob_size = sizeof(struct mana_tx_oob);
170
171 pkg.wqe_req.inline_oob_data = &pkg.tx_oob;
172 pkg.wqe_req.flags = 0;
173 pkg.wqe_req.client_data_unit = 0;
174
175 pkg.wqe_req.num_sge = 1 + skb_shinfo(skb)->nr_frags;
176 WARN_ON_ONCE(pkg.wqe_req.num_sge > 30);
177
178 if (pkg.wqe_req.num_sge <= ARRAY_SIZE(pkg.sgl_array)) {
179 pkg.wqe_req.sgl = pkg.sgl_array;
180 } else {
181 pkg.sgl_ptr = kmalloc_array(pkg.wqe_req.num_sge,
182 sizeof(struct gdma_sge),
183 GFP_ATOMIC);
184 if (!pkg.sgl_ptr)
185 goto tx_drop_count;
186
187 pkg.wqe_req.sgl = pkg.sgl_ptr;
188 }
189
190 if (skb->protocol == htons(ETH_P_IP))
191 ipv4 = true;
192 else if (skb->protocol == htons(ETH_P_IPV6))
193 ipv6 = true;
194
195 if (skb_is_gso(skb)) {
196 pkg.tx_oob.s_oob.is_outer_ipv4 = ipv4;
197 pkg.tx_oob.s_oob.is_outer_ipv6 = ipv6;
198
199 pkg.tx_oob.s_oob.comp_iphdr_csum = 1;
200 pkg.tx_oob.s_oob.comp_tcp_csum = 1;
201 pkg.tx_oob.s_oob.trans_off = skb_transport_offset(skb);
202
203 pkg.wqe_req.client_data_unit = skb_shinfo(skb)->gso_size;
204 pkg.wqe_req.flags = GDMA_WR_OOB_IN_SGL | GDMA_WR_PAD_BY_SGE0;
205 if (ipv4) {
206 ip_hdr(skb)->tot_len = 0;
207 ip_hdr(skb)->check = 0;
208 tcp_hdr(skb)->check =
209 ~csum_tcpudp_magic(ip_hdr(skb)->saddr,
210 ip_hdr(skb)->daddr, 0,
211 IPPROTO_TCP, 0);
212 } else {
213 ipv6_hdr(skb)->payload_len = 0;
214 tcp_hdr(skb)->check =
215 ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
216 &ipv6_hdr(skb)->daddr, 0,
217 IPPROTO_TCP, 0);
218 }
219 } else if (skb->ip_summed == CHECKSUM_PARTIAL) {
220 csum_type = mana_checksum_info(skb);
221
222 if (csum_type == IPPROTO_TCP) {
223 pkg.tx_oob.s_oob.is_outer_ipv4 = ipv4;
224 pkg.tx_oob.s_oob.is_outer_ipv6 = ipv6;
225
226 pkg.tx_oob.s_oob.comp_tcp_csum = 1;
227 pkg.tx_oob.s_oob.trans_off = skb_transport_offset(skb);
228
229 } else if (csum_type == IPPROTO_UDP) {
230 pkg.tx_oob.s_oob.is_outer_ipv4 = ipv4;
231 pkg.tx_oob.s_oob.is_outer_ipv6 = ipv6;
232
233 pkg.tx_oob.s_oob.comp_udp_csum = 1;
234 } else {
235
236 if (skb_checksum_help(skb))
237 goto free_sgl_ptr;
238 }
239 }
240
241 if (mana_map_skb(skb, apc, &pkg))
242 goto free_sgl_ptr;
243
244 skb_queue_tail(&txq->pending_skbs, skb);
245
246 len = skb->len;
247 net_txq = netdev_get_tx_queue(ndev, txq_idx);
248
249 err = mana_gd_post_work_request(gdma_sq, &pkg.wqe_req,
250 (struct gdma_posted_wqe_info *)skb->cb);
251 if (!mana_can_tx(gdma_sq)) {
252 netif_tx_stop_queue(net_txq);
253 apc->eth_stats.stop_queue++;
254 }
255
256 if (err) {
257 (void)skb_dequeue_tail(&txq->pending_skbs);
258 netdev_warn(ndev, "Failed to post TX OOB: %d\n", err);
259 err = NETDEV_TX_BUSY;
260 goto tx_busy;
261 }
262
263 err = NETDEV_TX_OK;
264 atomic_inc(&txq->pending_sends);
265
266 mana_gd_wq_ring_doorbell(gd->gdma_context, gdma_sq);
267
268
269 skb = NULL;
270
271 tx_stats = &txq->stats;
272 u64_stats_update_begin(&tx_stats->syncp);
273 tx_stats->packets++;
274 tx_stats->bytes += len;
275 u64_stats_update_end(&tx_stats->syncp);
276
277tx_busy:
278 if (netif_tx_queue_stopped(net_txq) && mana_can_tx(gdma_sq)) {
279 netif_tx_wake_queue(net_txq);
280 apc->eth_stats.wake_queue++;
281 }
282
283 kfree(pkg.sgl_ptr);
284 return err;
285
286free_sgl_ptr:
287 kfree(pkg.sgl_ptr);
288tx_drop_count:
289 ndev->stats.tx_dropped++;
290tx_drop:
291 dev_kfree_skb_any(skb);
292 return NETDEV_TX_OK;
293}
294
295static void mana_get_stats64(struct net_device *ndev,
296 struct rtnl_link_stats64 *st)
297{
298 struct mana_port_context *apc = netdev_priv(ndev);
299 unsigned int num_queues = apc->num_queues;
300 struct mana_stats *stats;
301 unsigned int start;
302 u64 packets, bytes;
303 int q;
304
305 if (!apc->port_is_up)
306 return;
307
308 netdev_stats_to_stats64(st, &ndev->stats);
309
310 for (q = 0; q < num_queues; q++) {
311 stats = &apc->rxqs[q]->stats;
312
313 do {
314 start = u64_stats_fetch_begin_irq(&stats->syncp);
315 packets = stats->packets;
316 bytes = stats->bytes;
317 } while (u64_stats_fetch_retry_irq(&stats->syncp, start));
318
319 st->rx_packets += packets;
320 st->rx_bytes += bytes;
321 }
322
323 for (q = 0; q < num_queues; q++) {
324 stats = &apc->tx_qp[q].txq.stats;
325
326 do {
327 start = u64_stats_fetch_begin_irq(&stats->syncp);
328 packets = stats->packets;
329 bytes = stats->bytes;
330 } while (u64_stats_fetch_retry_irq(&stats->syncp, start));
331
332 st->tx_packets += packets;
333 st->tx_bytes += bytes;
334 }
335}
336
337static int mana_get_tx_queue(struct net_device *ndev, struct sk_buff *skb,
338 int old_q)
339{
340 struct mana_port_context *apc = netdev_priv(ndev);
341 u32 hash = skb_get_hash(skb);
342 struct sock *sk = skb->sk;
343 int txq;
344
345 txq = apc->indir_table[hash & MANA_INDIRECT_TABLE_MASK];
346
347 if (txq != old_q && sk && sk_fullsock(sk) &&
348 rcu_access_pointer(sk->sk_dst_cache))
349 sk_tx_queue_set(sk, txq);
350
351 return txq;
352}
353
354static u16 mana_select_queue(struct net_device *ndev, struct sk_buff *skb,
355 struct net_device *sb_dev)
356{
357 int txq;
358
359 if (ndev->real_num_tx_queues == 1)
360 return 0;
361
362 txq = sk_tx_queue_get(skb->sk);
363
364 if (txq < 0 || skb->ooo_okay || txq >= ndev->real_num_tx_queues) {
365 if (skb_rx_queue_recorded(skb))
366 txq = skb_get_rx_queue(skb);
367 else
368 txq = mana_get_tx_queue(ndev, skb, txq);
369 }
370
371 return txq;
372}
373
374static const struct net_device_ops mana_devops = {
375 .ndo_open = mana_open,
376 .ndo_stop = mana_close,
377 .ndo_select_queue = mana_select_queue,
378 .ndo_start_xmit = mana_start_xmit,
379 .ndo_validate_addr = eth_validate_addr,
380 .ndo_get_stats64 = mana_get_stats64,
381};
382
383static void mana_cleanup_port_context(struct mana_port_context *apc)
384{
385 kfree(apc->rxqs);
386 apc->rxqs = NULL;
387}
388
389static int mana_init_port_context(struct mana_port_context *apc)
390{
391 apc->rxqs = kcalloc(apc->num_queues, sizeof(struct mana_rxq *),
392 GFP_KERNEL);
393
394 return !apc->rxqs ? -ENOMEM : 0;
395}
396
397static int mana_send_request(struct mana_context *ac, void *in_buf,
398 u32 in_len, void *out_buf, u32 out_len)
399{
400 struct gdma_context *gc = ac->gdma_dev->gdma_context;
401 struct gdma_resp_hdr *resp = out_buf;
402 struct gdma_req_hdr *req = in_buf;
403 struct device *dev = gc->dev;
404 static atomic_t activity_id;
405 int err;
406
407 req->dev_id = gc->mana.dev_id;
408 req->activity_id = atomic_inc_return(&activity_id);
409
410 err = mana_gd_send_request(gc, in_len, in_buf, out_len,
411 out_buf);
412 if (err || resp->status) {
413 dev_err(dev, "Failed to send mana message: %d, 0x%x\n",
414 err, resp->status);
415 return err ? err : -EPROTO;
416 }
417
418 if (req->dev_id.as_uint32 != resp->dev_id.as_uint32 ||
419 req->activity_id != resp->activity_id) {
420 dev_err(dev, "Unexpected mana message response: %x,%x,%x,%x\n",
421 req->dev_id.as_uint32, resp->dev_id.as_uint32,
422 req->activity_id, resp->activity_id);
423 return -EPROTO;
424 }
425
426 return 0;
427}
428
429static int mana_verify_resp_hdr(const struct gdma_resp_hdr *resp_hdr,
430 const enum mana_command_code expected_code,
431 const u32 min_size)
432{
433 if (resp_hdr->response.msg_type != expected_code)
434 return -EPROTO;
435
436 if (resp_hdr->response.msg_version < GDMA_MESSAGE_V1)
437 return -EPROTO;
438
439 if (resp_hdr->response.msg_size < min_size)
440 return -EPROTO;
441
442 return 0;
443}
444
445static int mana_query_device_cfg(struct mana_context *ac, u32 proto_major_ver,
446 u32 proto_minor_ver, u32 proto_micro_ver,
447 u16 *max_num_vports)
448{
449 struct gdma_context *gc = ac->gdma_dev->gdma_context;
450 struct mana_query_device_cfg_resp resp = {};
451 struct mana_query_device_cfg_req req = {};
452 struct device *dev = gc->dev;
453 int err = 0;
454
455 mana_gd_init_req_hdr(&req.hdr, MANA_QUERY_DEV_CONFIG,
456 sizeof(req), sizeof(resp));
457 req.proto_major_ver = proto_major_ver;
458 req.proto_minor_ver = proto_minor_ver;
459 req.proto_micro_ver = proto_micro_ver;
460
461 err = mana_send_request(ac, &req, sizeof(req), &resp, sizeof(resp));
462 if (err) {
463 dev_err(dev, "Failed to query config: %d", err);
464 return err;
465 }
466
467 err = mana_verify_resp_hdr(&resp.hdr, MANA_QUERY_DEV_CONFIG,
468 sizeof(resp));
469 if (err || resp.hdr.status) {
470 dev_err(dev, "Invalid query result: %d, 0x%x\n", err,
471 resp.hdr.status);
472 if (!err)
473 err = -EPROTO;
474 return err;
475 }
476
477 *max_num_vports = resp.max_num_vports;
478
479 return 0;
480}
481
482static int mana_query_vport_cfg(struct mana_port_context *apc, u32 vport_index,
483 u32 *max_sq, u32 *max_rq, u32 *num_indir_entry)
484{
485 struct mana_query_vport_cfg_resp resp = {};
486 struct mana_query_vport_cfg_req req = {};
487 int err;
488
489 mana_gd_init_req_hdr(&req.hdr, MANA_QUERY_VPORT_CONFIG,
490 sizeof(req), sizeof(resp));
491
492 req.vport_index = vport_index;
493
494 err = mana_send_request(apc->ac, &req, sizeof(req), &resp,
495 sizeof(resp));
496 if (err)
497 return err;
498
499 err = mana_verify_resp_hdr(&resp.hdr, MANA_QUERY_VPORT_CONFIG,
500 sizeof(resp));
501 if (err)
502 return err;
503
504 if (resp.hdr.status)
505 return -EPROTO;
506
507 *max_sq = resp.max_num_sq;
508 *max_rq = resp.max_num_rq;
509 *num_indir_entry = resp.num_indirection_ent;
510
511 apc->port_handle = resp.vport;
512 ether_addr_copy(apc->mac_addr, resp.mac_addr);
513
514 return 0;
515}
516
517static int mana_cfg_vport(struct mana_port_context *apc, u32 protection_dom_id,
518 u32 doorbell_pg_id)
519{
520 struct mana_config_vport_resp resp = {};
521 struct mana_config_vport_req req = {};
522 int err;
523
524 mana_gd_init_req_hdr(&req.hdr, MANA_CONFIG_VPORT_TX,
525 sizeof(req), sizeof(resp));
526 req.vport = apc->port_handle;
527 req.pdid = protection_dom_id;
528 req.doorbell_pageid = doorbell_pg_id;
529
530 err = mana_send_request(apc->ac, &req, sizeof(req), &resp,
531 sizeof(resp));
532 if (err) {
533 netdev_err(apc->ndev, "Failed to configure vPort: %d\n", err);
534 goto out;
535 }
536
537 err = mana_verify_resp_hdr(&resp.hdr, MANA_CONFIG_VPORT_TX,
538 sizeof(resp));
539 if (err || resp.hdr.status) {
540 netdev_err(apc->ndev, "Failed to configure vPort: %d, 0x%x\n",
541 err, resp.hdr.status);
542 if (!err)
543 err = -EPROTO;
544
545 goto out;
546 }
547
548 apc->tx_shortform_allowed = resp.short_form_allowed;
549 apc->tx_vp_offset = resp.tx_vport_offset;
550out:
551 return err;
552}
553
554static int mana_cfg_vport_steering(struct mana_port_context *apc,
555 enum TRI_STATE rx,
556 bool update_default_rxobj, bool update_key,
557 bool update_tab)
558{
559 u16 num_entries = MANA_INDIRECT_TABLE_SIZE;
560 struct mana_cfg_rx_steer_req *req = NULL;
561 struct mana_cfg_rx_steer_resp resp = {};
562 struct net_device *ndev = apc->ndev;
563 mana_handle_t *req_indir_tab;
564 u32 req_buf_size;
565 int err;
566
567 req_buf_size = sizeof(*req) + sizeof(mana_handle_t) * num_entries;
568 req = kzalloc(req_buf_size, GFP_KERNEL);
569 if (!req)
570 return -ENOMEM;
571
572 mana_gd_init_req_hdr(&req->hdr, MANA_CONFIG_VPORT_RX, req_buf_size,
573 sizeof(resp));
574
575 req->vport = apc->port_handle;
576 req->num_indir_entries = num_entries;
577 req->indir_tab_offset = sizeof(*req);
578 req->rx_enable = rx;
579 req->rss_enable = apc->rss_state;
580 req->update_default_rxobj = update_default_rxobj;
581 req->update_hashkey = update_key;
582 req->update_indir_tab = update_tab;
583 req->default_rxobj = apc->default_rxobj;
584
585 if (update_key)
586 memcpy(&req->hashkey, apc->hashkey, MANA_HASH_KEY_SIZE);
587
588 if (update_tab) {
589 req_indir_tab = (mana_handle_t *)(req + 1);
590 memcpy(req_indir_tab, apc->rxobj_table,
591 req->num_indir_entries * sizeof(mana_handle_t));
592 }
593
594 err = mana_send_request(apc->ac, req, req_buf_size, &resp,
595 sizeof(resp));
596 if (err) {
597 netdev_err(ndev, "Failed to configure vPort RX: %d\n", err);
598 goto out;
599 }
600
601 err = mana_verify_resp_hdr(&resp.hdr, MANA_CONFIG_VPORT_RX,
602 sizeof(resp));
603 if (err) {
604 netdev_err(ndev, "vPort RX configuration failed: %d\n", err);
605 goto out;
606 }
607
608 if (resp.hdr.status) {
609 netdev_err(ndev, "vPort RX configuration failed: 0x%x\n",
610 resp.hdr.status);
611 err = -EPROTO;
612 }
613out:
614 kfree(req);
615 return err;
616}
617
618static int mana_create_wq_obj(struct mana_port_context *apc,
619 mana_handle_t vport,
620 u32 wq_type, struct mana_obj_spec *wq_spec,
621 struct mana_obj_spec *cq_spec,
622 mana_handle_t *wq_obj)
623{
624 struct mana_create_wqobj_resp resp = {};
625 struct mana_create_wqobj_req req = {};
626 struct net_device *ndev = apc->ndev;
627 int err;
628
629 mana_gd_init_req_hdr(&req.hdr, MANA_CREATE_WQ_OBJ,
630 sizeof(req), sizeof(resp));
631 req.vport = vport;
632 req.wq_type = wq_type;
633 req.wq_gdma_region = wq_spec->gdma_region;
634 req.cq_gdma_region = cq_spec->gdma_region;
635 req.wq_size = wq_spec->queue_size;
636 req.cq_size = cq_spec->queue_size;
637 req.cq_moderation_ctx_id = cq_spec->modr_ctx_id;
638 req.cq_parent_qid = cq_spec->attached_eq;
639
640 err = mana_send_request(apc->ac, &req, sizeof(req), &resp,
641 sizeof(resp));
642 if (err) {
643 netdev_err(ndev, "Failed to create WQ object: %d\n", err);
644 goto out;
645 }
646
647 err = mana_verify_resp_hdr(&resp.hdr, MANA_CREATE_WQ_OBJ,
648 sizeof(resp));
649 if (err || resp.hdr.status) {
650 netdev_err(ndev, "Failed to create WQ object: %d, 0x%x\n", err,
651 resp.hdr.status);
652 if (!err)
653 err = -EPROTO;
654 goto out;
655 }
656
657 if (resp.wq_obj == INVALID_MANA_HANDLE) {
658 netdev_err(ndev, "Got an invalid WQ object handle\n");
659 err = -EPROTO;
660 goto out;
661 }
662
663 *wq_obj = resp.wq_obj;
664 wq_spec->queue_index = resp.wq_id;
665 cq_spec->queue_index = resp.cq_id;
666
667 return 0;
668out:
669 return err;
670}
671
672static void mana_destroy_wq_obj(struct mana_port_context *apc, u32 wq_type,
673 mana_handle_t wq_obj)
674{
675 struct mana_destroy_wqobj_resp resp = {};
676 struct mana_destroy_wqobj_req req = {};
677 struct net_device *ndev = apc->ndev;
678 int err;
679
680 mana_gd_init_req_hdr(&req.hdr, MANA_DESTROY_WQ_OBJ,
681 sizeof(req), sizeof(resp));
682 req.wq_type = wq_type;
683 req.wq_obj_handle = wq_obj;
684
685 err = mana_send_request(apc->ac, &req, sizeof(req), &resp,
686 sizeof(resp));
687 if (err) {
688 netdev_err(ndev, "Failed to destroy WQ object: %d\n", err);
689 return;
690 }
691
692 err = mana_verify_resp_hdr(&resp.hdr, MANA_DESTROY_WQ_OBJ,
693 sizeof(resp));
694 if (err || resp.hdr.status)
695 netdev_err(ndev, "Failed to destroy WQ object: %d, 0x%x\n", err,
696 resp.hdr.status);
697}
698
699static void mana_destroy_eq(struct mana_context *ac)
700{
701 struct gdma_context *gc = ac->gdma_dev->gdma_context;
702 struct gdma_queue *eq;
703 int i;
704
705 if (!ac->eqs)
706 return;
707
708 for (i = 0; i < gc->max_num_queues; i++) {
709 eq = ac->eqs[i].eq;
710 if (!eq)
711 continue;
712
713 mana_gd_destroy_queue(gc, eq);
714 }
715
716 kfree(ac->eqs);
717 ac->eqs = NULL;
718}
719
720static int mana_create_eq(struct mana_context *ac)
721{
722 struct gdma_dev *gd = ac->gdma_dev;
723 struct gdma_context *gc = gd->gdma_context;
724 struct gdma_queue_spec spec = {};
725 int err;
726 int i;
727
728 ac->eqs = kcalloc(gc->max_num_queues, sizeof(struct mana_eq),
729 GFP_KERNEL);
730 if (!ac->eqs)
731 return -ENOMEM;
732
733 spec.type = GDMA_EQ;
734 spec.monitor_avl_buf = false;
735 spec.queue_size = EQ_SIZE;
736 spec.eq.callback = NULL;
737 spec.eq.context = ac->eqs;
738 spec.eq.log2_throttle_limit = LOG2_EQ_THROTTLE;
739
740 for (i = 0; i < gc->max_num_queues; i++) {
741 err = mana_gd_create_mana_eq(gd, &spec, &ac->eqs[i].eq);
742 if (err)
743 goto out;
744 }
745
746 return 0;
747out:
748 mana_destroy_eq(ac);
749 return err;
750}
751
752static int mana_move_wq_tail(struct gdma_queue *wq, u32 num_units)
753{
754 u32 used_space_old;
755 u32 used_space_new;
756
757 used_space_old = wq->head - wq->tail;
758 used_space_new = wq->head - (wq->tail + num_units);
759
760 if (WARN_ON_ONCE(used_space_new > used_space_old))
761 return -ERANGE;
762
763 wq->tail += num_units;
764 return 0;
765}
766
767static void mana_unmap_skb(struct sk_buff *skb, struct mana_port_context *apc)
768{
769 struct mana_skb_head *ash = (struct mana_skb_head *)skb->head;
770 struct gdma_context *gc = apc->ac->gdma_dev->gdma_context;
771 struct device *dev = gc->dev;
772 int i;
773
774 dma_unmap_single(dev, ash->dma_handle[0], ash->size[0], DMA_TO_DEVICE);
775
776 for (i = 1; i < skb_shinfo(skb)->nr_frags + 1; i++)
777 dma_unmap_page(dev, ash->dma_handle[i], ash->size[i],
778 DMA_TO_DEVICE);
779}
780
781static void mana_poll_tx_cq(struct mana_cq *cq)
782{
783 struct gdma_comp *completions = cq->gdma_comp_buf;
784 struct gdma_posted_wqe_info *wqe_info;
785 unsigned int pkt_transmitted = 0;
786 unsigned int wqe_unit_cnt = 0;
787 struct mana_txq *txq = cq->txq;
788 struct mana_port_context *apc;
789 struct netdev_queue *net_txq;
790 struct gdma_queue *gdma_wq;
791 unsigned int avail_space;
792 struct net_device *ndev;
793 struct sk_buff *skb;
794 bool txq_stopped;
795 int comp_read;
796 int i;
797
798 ndev = txq->ndev;
799 apc = netdev_priv(ndev);
800
801 comp_read = mana_gd_poll_cq(cq->gdma_cq, completions,
802 CQE_POLLING_BUFFER);
803
804 if (comp_read < 1)
805 return;
806
807 for (i = 0; i < comp_read; i++) {
808 struct mana_tx_comp_oob *cqe_oob;
809
810 if (WARN_ON_ONCE(!completions[i].is_sq))
811 return;
812
813 cqe_oob = (struct mana_tx_comp_oob *)completions[i].cqe_data;
814 if (WARN_ON_ONCE(cqe_oob->cqe_hdr.client_type !=
815 MANA_CQE_COMPLETION))
816 return;
817
818 switch (cqe_oob->cqe_hdr.cqe_type) {
819 case CQE_TX_OKAY:
820 break;
821
822 case CQE_TX_SA_DROP:
823 case CQE_TX_MTU_DROP:
824 case CQE_TX_INVALID_OOB:
825 case CQE_TX_INVALID_ETH_TYPE:
826 case CQE_TX_HDR_PROCESSING_ERROR:
827 case CQE_TX_VF_DISABLED:
828 case CQE_TX_VPORT_IDX_OUT_OF_RANGE:
829 case CQE_TX_VPORT_DISABLED:
830 case CQE_TX_VLAN_TAGGING_VIOLATION:
831 WARN_ONCE(1, "TX: CQE error %d: ignored.\n",
832 cqe_oob->cqe_hdr.cqe_type);
833 break;
834
835 default:
836
837
838
839 WARN_ONCE(1, "TX: Unexpected CQE type %d: HW BUG?\n",
840 cqe_oob->cqe_hdr.cqe_type);
841 return;
842 }
843
844 if (WARN_ON_ONCE(txq->gdma_txq_id != completions[i].wq_num))
845 return;
846
847 skb = skb_dequeue(&txq->pending_skbs);
848 if (WARN_ON_ONCE(!skb))
849 return;
850
851 wqe_info = (struct gdma_posted_wqe_info *)skb->cb;
852 wqe_unit_cnt += wqe_info->wqe_size_in_bu;
853
854 mana_unmap_skb(skb, apc);
855
856 napi_consume_skb(skb, cq->budget);
857
858 pkt_transmitted++;
859 }
860
861 if (WARN_ON_ONCE(wqe_unit_cnt == 0))
862 return;
863
864 mana_move_wq_tail(txq->gdma_sq, wqe_unit_cnt);
865
866 gdma_wq = txq->gdma_sq;
867 avail_space = mana_gd_wq_avail_space(gdma_wq);
868
869
870 smp_mb();
871
872 net_txq = txq->net_txq;
873 txq_stopped = netif_tx_queue_stopped(net_txq);
874
875
876 smp_rmb();
877
878 if (txq_stopped && apc->port_is_up && avail_space >= MAX_TX_WQE_SIZE) {
879 netif_tx_wake_queue(net_txq);
880 apc->eth_stats.wake_queue++;
881 }
882
883 if (atomic_sub_return(pkt_transmitted, &txq->pending_sends) < 0)
884 WARN_ON_ONCE(1);
885
886 cq->work_done = pkt_transmitted;
887}
888
889static void mana_post_pkt_rxq(struct mana_rxq *rxq)
890{
891 struct mana_recv_buf_oob *recv_buf_oob;
892 u32 curr_index;
893 int err;
894
895 curr_index = rxq->buf_index++;
896 if (rxq->buf_index == rxq->num_rx_buf)
897 rxq->buf_index = 0;
898
899 recv_buf_oob = &rxq->rx_oobs[curr_index];
900
901 err = mana_gd_post_and_ring(rxq->gdma_rq, &recv_buf_oob->wqe_req,
902 &recv_buf_oob->wqe_inf);
903 if (WARN_ON_ONCE(err))
904 return;
905
906 WARN_ON_ONCE(recv_buf_oob->wqe_inf.wqe_size_in_bu != 1);
907}
908
909static void mana_rx_skb(void *buf_va, struct mana_rxcomp_oob *cqe,
910 struct mana_rxq *rxq)
911{
912 struct mana_stats *rx_stats = &rxq->stats;
913 struct net_device *ndev = rxq->ndev;
914 uint pkt_len = cqe->ppi[0].pkt_len;
915 u16 rxq_idx = rxq->rxq_idx;
916 struct napi_struct *napi;
917 struct sk_buff *skb;
918 u32 hash_value;
919
920 rxq->rx_cq.work_done++;
921 napi = &rxq->rx_cq.napi;
922
923 if (!buf_va) {
924 ++ndev->stats.rx_dropped;
925 return;
926 }
927
928 skb = build_skb(buf_va, PAGE_SIZE);
929
930 if (!skb) {
931 free_page((unsigned long)buf_va);
932 ++ndev->stats.rx_dropped;
933 return;
934 }
935
936 skb_put(skb, pkt_len);
937 skb->dev = napi->dev;
938
939 skb->protocol = eth_type_trans(skb, ndev);
940 skb_checksum_none_assert(skb);
941 skb_record_rx_queue(skb, rxq_idx);
942
943 if ((ndev->features & NETIF_F_RXCSUM) && cqe->rx_iphdr_csum_succeed) {
944 if (cqe->rx_tcp_csum_succeed || cqe->rx_udp_csum_succeed)
945 skb->ip_summed = CHECKSUM_UNNECESSARY;
946 }
947
948 if (cqe->rx_hashtype != 0 && (ndev->features & NETIF_F_RXHASH)) {
949 hash_value = cqe->ppi[0].pkt_hash;
950
951 if (cqe->rx_hashtype & MANA_HASH_L4)
952 skb_set_hash(skb, hash_value, PKT_HASH_TYPE_L4);
953 else
954 skb_set_hash(skb, hash_value, PKT_HASH_TYPE_L3);
955 }
956
957 napi_gro_receive(napi, skb);
958
959 u64_stats_update_begin(&rx_stats->syncp);
960 rx_stats->packets++;
961 rx_stats->bytes += pkt_len;
962 u64_stats_update_end(&rx_stats->syncp);
963}
964
965static void mana_process_rx_cqe(struct mana_rxq *rxq, struct mana_cq *cq,
966 struct gdma_comp *cqe)
967{
968 struct mana_rxcomp_oob *oob = (struct mana_rxcomp_oob *)cqe->cqe_data;
969 struct gdma_context *gc = rxq->gdma_rq->gdma_dev->gdma_context;
970 struct net_device *ndev = rxq->ndev;
971 struct mana_recv_buf_oob *rxbuf_oob;
972 struct device *dev = gc->dev;
973 void *new_buf, *old_buf;
974 struct page *new_page;
975 u32 curr, pktlen;
976 dma_addr_t da;
977
978 switch (oob->cqe_hdr.cqe_type) {
979 case CQE_RX_OKAY:
980 break;
981
982 case CQE_RX_TRUNCATED:
983 netdev_err(ndev, "Dropped a truncated packet\n");
984 return;
985
986 case CQE_RX_COALESCED_4:
987 netdev_err(ndev, "RX coalescing is unsupported\n");
988 return;
989
990 case CQE_RX_OBJECT_FENCE:
991 netdev_err(ndev, "RX Fencing is unsupported\n");
992 return;
993
994 default:
995 netdev_err(ndev, "Unknown RX CQE type = %d\n",
996 oob->cqe_hdr.cqe_type);
997 return;
998 }
999
1000 if (oob->cqe_hdr.cqe_type != CQE_RX_OKAY)
1001 return;
1002
1003 pktlen = oob->ppi[0].pkt_len;
1004
1005 if (pktlen == 0) {
1006
1007 netdev_err(ndev, "RX pkt len=0, rq=%u, cq=%u, rxobj=0x%llx\n",
1008 rxq->gdma_id, cq->gdma_id, rxq->rxobj);
1009 return;
1010 }
1011
1012 curr = rxq->buf_index;
1013 rxbuf_oob = &rxq->rx_oobs[curr];
1014 WARN_ON_ONCE(rxbuf_oob->wqe_inf.wqe_size_in_bu != 1);
1015
1016 new_page = alloc_page(GFP_ATOMIC);
1017
1018 if (new_page) {
1019 da = dma_map_page(dev, new_page, 0, rxq->datasize,
1020 DMA_FROM_DEVICE);
1021
1022 if (dma_mapping_error(dev, da)) {
1023 __free_page(new_page);
1024 new_page = NULL;
1025 }
1026 }
1027
1028 new_buf = new_page ? page_to_virt(new_page) : NULL;
1029
1030 if (new_buf) {
1031 dma_unmap_page(dev, rxbuf_oob->buf_dma_addr, rxq->datasize,
1032 DMA_FROM_DEVICE);
1033
1034 old_buf = rxbuf_oob->buf_va;
1035
1036
1037 rxbuf_oob->buf_va = new_buf;
1038 rxbuf_oob->buf_dma_addr = da;
1039 rxbuf_oob->sgl[0].address = rxbuf_oob->buf_dma_addr;
1040 } else {
1041 old_buf = NULL;
1042 }
1043
1044 mana_rx_skb(old_buf, oob, rxq);
1045
1046 mana_move_wq_tail(rxq->gdma_rq, rxbuf_oob->wqe_inf.wqe_size_in_bu);
1047
1048 mana_post_pkt_rxq(rxq);
1049}
1050
1051static void mana_poll_rx_cq(struct mana_cq *cq)
1052{
1053 struct gdma_comp *comp = cq->gdma_comp_buf;
1054 int comp_read, i;
1055
1056 comp_read = mana_gd_poll_cq(cq->gdma_cq, comp, CQE_POLLING_BUFFER);
1057 WARN_ON_ONCE(comp_read > CQE_POLLING_BUFFER);
1058
1059 for (i = 0; i < comp_read; i++) {
1060 if (WARN_ON_ONCE(comp[i].is_sq))
1061 return;
1062
1063
1064 if (WARN_ON_ONCE(comp[i].wq_num != cq->rxq->gdma_id))
1065 return;
1066
1067 mana_process_rx_cqe(cq->rxq, cq, &comp[i]);
1068 }
1069}
1070
1071static void mana_cq_handler(void *context, struct gdma_queue *gdma_queue)
1072{
1073 struct mana_cq *cq = context;
1074 u8 arm_bit;
1075
1076 WARN_ON_ONCE(cq->gdma_cq != gdma_queue);
1077
1078 if (cq->type == MANA_CQ_TYPE_RX)
1079 mana_poll_rx_cq(cq);
1080 else
1081 mana_poll_tx_cq(cq);
1082
1083 if (cq->work_done < cq->budget &&
1084 napi_complete_done(&cq->napi, cq->work_done)) {
1085 arm_bit = SET_ARM_BIT;
1086 } else {
1087 arm_bit = 0;
1088 }
1089
1090 mana_gd_ring_cq(gdma_queue, arm_bit);
1091}
1092
1093static int mana_poll(struct napi_struct *napi, int budget)
1094{
1095 struct mana_cq *cq = container_of(napi, struct mana_cq, napi);
1096
1097 cq->work_done = 0;
1098 cq->budget = budget;
1099
1100 mana_cq_handler(cq, cq->gdma_cq);
1101
1102 return min(cq->work_done, budget);
1103}
1104
1105static void mana_schedule_napi(void *context, struct gdma_queue *gdma_queue)
1106{
1107 struct mana_cq *cq = context;
1108
1109 napi_schedule_irqoff(&cq->napi);
1110}
1111
1112static void mana_deinit_cq(struct mana_port_context *apc, struct mana_cq *cq)
1113{
1114 struct gdma_dev *gd = apc->ac->gdma_dev;
1115
1116 if (!cq->gdma_cq)
1117 return;
1118
1119 mana_gd_destroy_queue(gd->gdma_context, cq->gdma_cq);
1120}
1121
1122static void mana_deinit_txq(struct mana_port_context *apc, struct mana_txq *txq)
1123{
1124 struct gdma_dev *gd = apc->ac->gdma_dev;
1125
1126 if (!txq->gdma_sq)
1127 return;
1128
1129 mana_gd_destroy_queue(gd->gdma_context, txq->gdma_sq);
1130}
1131
1132static void mana_destroy_txq(struct mana_port_context *apc)
1133{
1134 struct napi_struct *napi;
1135 int i;
1136
1137 if (!apc->tx_qp)
1138 return;
1139
1140 for (i = 0; i < apc->num_queues; i++) {
1141 napi = &apc->tx_qp[i].tx_cq.napi;
1142 napi_synchronize(napi);
1143 napi_disable(napi);
1144 netif_napi_del(napi);
1145
1146 mana_destroy_wq_obj(apc, GDMA_SQ, apc->tx_qp[i].tx_object);
1147
1148 mana_deinit_cq(apc, &apc->tx_qp[i].tx_cq);
1149
1150 mana_deinit_txq(apc, &apc->tx_qp[i].txq);
1151 }
1152
1153 kfree(apc->tx_qp);
1154 apc->tx_qp = NULL;
1155}
1156
1157static int mana_create_txq(struct mana_port_context *apc,
1158 struct net_device *net)
1159{
1160 struct mana_context *ac = apc->ac;
1161 struct gdma_dev *gd = ac->gdma_dev;
1162 struct mana_obj_spec wq_spec;
1163 struct mana_obj_spec cq_spec;
1164 struct gdma_queue_spec spec;
1165 struct gdma_context *gc;
1166 struct mana_txq *txq;
1167 struct mana_cq *cq;
1168 u32 txq_size;
1169 u32 cq_size;
1170 int err;
1171 int i;
1172
1173 apc->tx_qp = kcalloc(apc->num_queues, sizeof(struct mana_tx_qp),
1174 GFP_KERNEL);
1175 if (!apc->tx_qp)
1176 return -ENOMEM;
1177
1178
1179
1180
1181
1182
1183 txq_size = MAX_SEND_BUFFERS_PER_QUEUE * 32;
1184 BUILD_BUG_ON(!PAGE_ALIGNED(txq_size));
1185
1186 cq_size = MAX_SEND_BUFFERS_PER_QUEUE * COMP_ENTRY_SIZE;
1187 cq_size = PAGE_ALIGN(cq_size);
1188
1189 gc = gd->gdma_context;
1190
1191 for (i = 0; i < apc->num_queues; i++) {
1192 apc->tx_qp[i].tx_object = INVALID_MANA_HANDLE;
1193
1194
1195 txq = &apc->tx_qp[i].txq;
1196
1197 u64_stats_init(&txq->stats.syncp);
1198 txq->ndev = net;
1199 txq->net_txq = netdev_get_tx_queue(net, i);
1200 txq->vp_offset = apc->tx_vp_offset;
1201 skb_queue_head_init(&txq->pending_skbs);
1202
1203 memset(&spec, 0, sizeof(spec));
1204 spec.type = GDMA_SQ;
1205 spec.monitor_avl_buf = true;
1206 spec.queue_size = txq_size;
1207 err = mana_gd_create_mana_wq_cq(gd, &spec, &txq->gdma_sq);
1208 if (err)
1209 goto out;
1210
1211
1212 cq = &apc->tx_qp[i].tx_cq;
1213 cq->type = MANA_CQ_TYPE_TX;
1214
1215 cq->txq = txq;
1216
1217 memset(&spec, 0, sizeof(spec));
1218 spec.type = GDMA_CQ;
1219 spec.monitor_avl_buf = false;
1220 spec.queue_size = cq_size;
1221 spec.cq.callback = mana_schedule_napi;
1222 spec.cq.parent_eq = ac->eqs[i].eq;
1223 spec.cq.context = cq;
1224 err = mana_gd_create_mana_wq_cq(gd, &spec, &cq->gdma_cq);
1225 if (err)
1226 goto out;
1227
1228 memset(&wq_spec, 0, sizeof(wq_spec));
1229 memset(&cq_spec, 0, sizeof(cq_spec));
1230
1231 wq_spec.gdma_region = txq->gdma_sq->mem_info.gdma_region;
1232 wq_spec.queue_size = txq->gdma_sq->queue_size;
1233
1234 cq_spec.gdma_region = cq->gdma_cq->mem_info.gdma_region;
1235 cq_spec.queue_size = cq->gdma_cq->queue_size;
1236 cq_spec.modr_ctx_id = 0;
1237 cq_spec.attached_eq = cq->gdma_cq->cq.parent->id;
1238
1239 err = mana_create_wq_obj(apc, apc->port_handle, GDMA_SQ,
1240 &wq_spec, &cq_spec,
1241 &apc->tx_qp[i].tx_object);
1242
1243 if (err)
1244 goto out;
1245
1246 txq->gdma_sq->id = wq_spec.queue_index;
1247 cq->gdma_cq->id = cq_spec.queue_index;
1248
1249 txq->gdma_sq->mem_info.gdma_region = GDMA_INVALID_DMA_REGION;
1250 cq->gdma_cq->mem_info.gdma_region = GDMA_INVALID_DMA_REGION;
1251
1252 txq->gdma_txq_id = txq->gdma_sq->id;
1253
1254 cq->gdma_id = cq->gdma_cq->id;
1255
1256 if (WARN_ON(cq->gdma_id >= gc->max_num_cqs)) {
1257 err = -EINVAL;
1258 goto out;
1259 }
1260
1261 gc->cq_table[cq->gdma_id] = cq->gdma_cq;
1262
1263 netif_tx_napi_add(net, &cq->napi, mana_poll, NAPI_POLL_WEIGHT);
1264 napi_enable(&cq->napi);
1265
1266 mana_gd_ring_cq(cq->gdma_cq, SET_ARM_BIT);
1267 }
1268
1269 return 0;
1270out:
1271 mana_destroy_txq(apc);
1272 return err;
1273}
1274
1275static void mana_destroy_rxq(struct mana_port_context *apc,
1276 struct mana_rxq *rxq, bool validate_state)
1277
1278{
1279 struct gdma_context *gc = apc->ac->gdma_dev->gdma_context;
1280 struct mana_recv_buf_oob *rx_oob;
1281 struct device *dev = gc->dev;
1282 struct napi_struct *napi;
1283 int i;
1284
1285 if (!rxq)
1286 return;
1287
1288 napi = &rxq->rx_cq.napi;
1289
1290 if (validate_state)
1291 napi_synchronize(napi);
1292
1293 napi_disable(napi);
1294 netif_napi_del(napi);
1295
1296 mana_destroy_wq_obj(apc, GDMA_RQ, rxq->rxobj);
1297
1298 mana_deinit_cq(apc, &rxq->rx_cq);
1299
1300 for (i = 0; i < rxq->num_rx_buf; i++) {
1301 rx_oob = &rxq->rx_oobs[i];
1302
1303 if (!rx_oob->buf_va)
1304 continue;
1305
1306 dma_unmap_page(dev, rx_oob->buf_dma_addr, rxq->datasize,
1307 DMA_FROM_DEVICE);
1308
1309 free_page((unsigned long)rx_oob->buf_va);
1310 rx_oob->buf_va = NULL;
1311 }
1312
1313 if (rxq->gdma_rq)
1314 mana_gd_destroy_queue(gc, rxq->gdma_rq);
1315
1316 kfree(rxq);
1317}
1318
1319#define MANA_WQE_HEADER_SIZE 16
1320#define MANA_WQE_SGE_SIZE 16
1321
1322static int mana_alloc_rx_wqe(struct mana_port_context *apc,
1323 struct mana_rxq *rxq, u32 *rxq_size, u32 *cq_size)
1324{
1325 struct gdma_context *gc = apc->ac->gdma_dev->gdma_context;
1326 struct mana_recv_buf_oob *rx_oob;
1327 struct device *dev = gc->dev;
1328 struct page *page;
1329 dma_addr_t da;
1330 u32 buf_idx;
1331
1332 WARN_ON(rxq->datasize == 0 || rxq->datasize > PAGE_SIZE);
1333
1334 *rxq_size = 0;
1335 *cq_size = 0;
1336
1337 for (buf_idx = 0; buf_idx < rxq->num_rx_buf; buf_idx++) {
1338 rx_oob = &rxq->rx_oobs[buf_idx];
1339 memset(rx_oob, 0, sizeof(*rx_oob));
1340
1341 page = alloc_page(GFP_KERNEL);
1342 if (!page)
1343 return -ENOMEM;
1344
1345 da = dma_map_page(dev, page, 0, rxq->datasize, DMA_FROM_DEVICE);
1346
1347 if (dma_mapping_error(dev, da)) {
1348 __free_page(page);
1349 return -ENOMEM;
1350 }
1351
1352 rx_oob->buf_va = page_to_virt(page);
1353 rx_oob->buf_dma_addr = da;
1354
1355 rx_oob->num_sge = 1;
1356 rx_oob->sgl[0].address = rx_oob->buf_dma_addr;
1357 rx_oob->sgl[0].size = rxq->datasize;
1358 rx_oob->sgl[0].mem_key = apc->ac->gdma_dev->gpa_mkey;
1359
1360 rx_oob->wqe_req.sgl = rx_oob->sgl;
1361 rx_oob->wqe_req.num_sge = rx_oob->num_sge;
1362 rx_oob->wqe_req.inline_oob_size = 0;
1363 rx_oob->wqe_req.inline_oob_data = NULL;
1364 rx_oob->wqe_req.flags = 0;
1365 rx_oob->wqe_req.client_data_unit = 0;
1366
1367 *rxq_size += ALIGN(MANA_WQE_HEADER_SIZE +
1368 MANA_WQE_SGE_SIZE * rx_oob->num_sge, 32);
1369 *cq_size += COMP_ENTRY_SIZE;
1370 }
1371
1372 return 0;
1373}
1374
1375static int mana_push_wqe(struct mana_rxq *rxq)
1376{
1377 struct mana_recv_buf_oob *rx_oob;
1378 u32 buf_idx;
1379 int err;
1380
1381 for (buf_idx = 0; buf_idx < rxq->num_rx_buf; buf_idx++) {
1382 rx_oob = &rxq->rx_oobs[buf_idx];
1383
1384 err = mana_gd_post_and_ring(rxq->gdma_rq, &rx_oob->wqe_req,
1385 &rx_oob->wqe_inf);
1386 if (err)
1387 return -ENOSPC;
1388 }
1389
1390 return 0;
1391}
1392
1393static struct mana_rxq *mana_create_rxq(struct mana_port_context *apc,
1394 u32 rxq_idx, struct mana_eq *eq,
1395 struct net_device *ndev)
1396{
1397 struct gdma_dev *gd = apc->ac->gdma_dev;
1398 struct mana_obj_spec wq_spec;
1399 struct mana_obj_spec cq_spec;
1400 struct gdma_queue_spec spec;
1401 struct mana_cq *cq = NULL;
1402 struct gdma_context *gc;
1403 u32 cq_size, rq_size;
1404 struct mana_rxq *rxq;
1405 int err;
1406
1407 gc = gd->gdma_context;
1408
1409 rxq = kzalloc(struct_size(rxq, rx_oobs, RX_BUFFERS_PER_QUEUE),
1410 GFP_KERNEL);
1411 if (!rxq)
1412 return NULL;
1413
1414 rxq->ndev = ndev;
1415 rxq->num_rx_buf = RX_BUFFERS_PER_QUEUE;
1416 rxq->rxq_idx = rxq_idx;
1417 rxq->datasize = ALIGN(MAX_FRAME_SIZE, 64);
1418 rxq->rxobj = INVALID_MANA_HANDLE;
1419
1420 err = mana_alloc_rx_wqe(apc, rxq, &rq_size, &cq_size);
1421 if (err)
1422 goto out;
1423
1424 rq_size = PAGE_ALIGN(rq_size);
1425 cq_size = PAGE_ALIGN(cq_size);
1426
1427
1428 memset(&spec, 0, sizeof(spec));
1429 spec.type = GDMA_RQ;
1430 spec.monitor_avl_buf = true;
1431 spec.queue_size = rq_size;
1432 err = mana_gd_create_mana_wq_cq(gd, &spec, &rxq->gdma_rq);
1433 if (err)
1434 goto out;
1435
1436
1437 cq = &rxq->rx_cq;
1438 cq->type = MANA_CQ_TYPE_RX;
1439 cq->rxq = rxq;
1440
1441 memset(&spec, 0, sizeof(spec));
1442 spec.type = GDMA_CQ;
1443 spec.monitor_avl_buf = false;
1444 spec.queue_size = cq_size;
1445 spec.cq.callback = mana_schedule_napi;
1446 spec.cq.parent_eq = eq->eq;
1447 spec.cq.context = cq;
1448 err = mana_gd_create_mana_wq_cq(gd, &spec, &cq->gdma_cq);
1449 if (err)
1450 goto out;
1451
1452 memset(&wq_spec, 0, sizeof(wq_spec));
1453 memset(&cq_spec, 0, sizeof(cq_spec));
1454 wq_spec.gdma_region = rxq->gdma_rq->mem_info.gdma_region;
1455 wq_spec.queue_size = rxq->gdma_rq->queue_size;
1456
1457 cq_spec.gdma_region = cq->gdma_cq->mem_info.gdma_region;
1458 cq_spec.queue_size = cq->gdma_cq->queue_size;
1459 cq_spec.modr_ctx_id = 0;
1460 cq_spec.attached_eq = cq->gdma_cq->cq.parent->id;
1461
1462 err = mana_create_wq_obj(apc, apc->port_handle, GDMA_RQ,
1463 &wq_spec, &cq_spec, &rxq->rxobj);
1464 if (err)
1465 goto out;
1466
1467 rxq->gdma_rq->id = wq_spec.queue_index;
1468 cq->gdma_cq->id = cq_spec.queue_index;
1469
1470 rxq->gdma_rq->mem_info.gdma_region = GDMA_INVALID_DMA_REGION;
1471 cq->gdma_cq->mem_info.gdma_region = GDMA_INVALID_DMA_REGION;
1472
1473 rxq->gdma_id = rxq->gdma_rq->id;
1474 cq->gdma_id = cq->gdma_cq->id;
1475
1476 err = mana_push_wqe(rxq);
1477 if (err)
1478 goto out;
1479
1480 if (WARN_ON(cq->gdma_id >= gc->max_num_cqs)) {
1481 err = -EINVAL;
1482 goto out;
1483 }
1484
1485 gc->cq_table[cq->gdma_id] = cq->gdma_cq;
1486
1487 netif_napi_add(ndev, &cq->napi, mana_poll, 1);
1488 napi_enable(&cq->napi);
1489
1490 mana_gd_ring_cq(cq->gdma_cq, SET_ARM_BIT);
1491out:
1492 if (!err)
1493 return rxq;
1494
1495 netdev_err(ndev, "Failed to create RXQ: err = %d\n", err);
1496
1497 mana_destroy_rxq(apc, rxq, false);
1498
1499 if (cq)
1500 mana_deinit_cq(apc, cq);
1501
1502 return NULL;
1503}
1504
1505static int mana_add_rx_queues(struct mana_port_context *apc,
1506 struct net_device *ndev)
1507{
1508 struct mana_context *ac = apc->ac;
1509 struct mana_rxq *rxq;
1510 int err = 0;
1511 int i;
1512
1513 for (i = 0; i < apc->num_queues; i++) {
1514 rxq = mana_create_rxq(apc, i, &ac->eqs[i], ndev);
1515 if (!rxq) {
1516 err = -ENOMEM;
1517 goto out;
1518 }
1519
1520 u64_stats_init(&rxq->stats.syncp);
1521
1522 apc->rxqs[i] = rxq;
1523 }
1524
1525 apc->default_rxobj = apc->rxqs[0]->rxobj;
1526out:
1527 return err;
1528}
1529
1530static void mana_destroy_vport(struct mana_port_context *apc)
1531{
1532 struct mana_rxq *rxq;
1533 u32 rxq_idx;
1534
1535 for (rxq_idx = 0; rxq_idx < apc->num_queues; rxq_idx++) {
1536 rxq = apc->rxqs[rxq_idx];
1537 if (!rxq)
1538 continue;
1539
1540 mana_destroy_rxq(apc, rxq, true);
1541 apc->rxqs[rxq_idx] = NULL;
1542 }
1543
1544 mana_destroy_txq(apc);
1545}
1546
1547static int mana_create_vport(struct mana_port_context *apc,
1548 struct net_device *net)
1549{
1550 struct gdma_dev *gd = apc->ac->gdma_dev;
1551 int err;
1552
1553 apc->default_rxobj = INVALID_MANA_HANDLE;
1554
1555 err = mana_cfg_vport(apc, gd->pdid, gd->doorbell);
1556 if (err)
1557 return err;
1558
1559 return mana_create_txq(apc, net);
1560}
1561
1562static void mana_rss_table_init(struct mana_port_context *apc)
1563{
1564 int i;
1565
1566 for (i = 0; i < MANA_INDIRECT_TABLE_SIZE; i++)
1567 apc->indir_table[i] =
1568 ethtool_rxfh_indir_default(i, apc->num_queues);
1569}
1570
1571int mana_config_rss(struct mana_port_context *apc, enum TRI_STATE rx,
1572 bool update_hash, bool update_tab)
1573{
1574 u32 queue_idx;
1575 int i;
1576
1577 if (update_tab) {
1578 for (i = 0; i < MANA_INDIRECT_TABLE_SIZE; i++) {
1579 queue_idx = apc->indir_table[i];
1580 apc->rxobj_table[i] = apc->rxqs[queue_idx]->rxobj;
1581 }
1582 }
1583
1584 return mana_cfg_vport_steering(apc, rx, true, update_hash, update_tab);
1585}
1586
1587static int mana_init_port(struct net_device *ndev)
1588{
1589 struct mana_port_context *apc = netdev_priv(ndev);
1590 u32 max_txq, max_rxq, max_queues;
1591 int port_idx = apc->port_idx;
1592 u32 num_indirect_entries;
1593 int err;
1594
1595 err = mana_init_port_context(apc);
1596 if (err)
1597 return err;
1598
1599 err = mana_query_vport_cfg(apc, port_idx, &max_txq, &max_rxq,
1600 &num_indirect_entries);
1601 if (err) {
1602 netdev_err(ndev, "Failed to query info for vPort 0\n");
1603 goto reset_apc;
1604 }
1605
1606 max_queues = min_t(u32, max_txq, max_rxq);
1607 if (apc->max_queues > max_queues)
1608 apc->max_queues = max_queues;
1609
1610 if (apc->num_queues > apc->max_queues)
1611 apc->num_queues = apc->max_queues;
1612
1613 ether_addr_copy(ndev->dev_addr, apc->mac_addr);
1614
1615 return 0;
1616
1617reset_apc:
1618 kfree(apc->rxqs);
1619 apc->rxqs = NULL;
1620 return err;
1621}
1622
1623int mana_alloc_queues(struct net_device *ndev)
1624{
1625 struct mana_port_context *apc = netdev_priv(ndev);
1626 int err;
1627
1628 err = mana_create_vport(apc, ndev);
1629 if (err)
1630 return err;
1631
1632 err = netif_set_real_num_tx_queues(ndev, apc->num_queues);
1633 if (err)
1634 goto destroy_vport;
1635
1636 err = mana_add_rx_queues(apc, ndev);
1637 if (err)
1638 goto destroy_vport;
1639
1640 apc->rss_state = apc->num_queues > 1 ? TRI_STATE_TRUE : TRI_STATE_FALSE;
1641
1642 err = netif_set_real_num_rx_queues(ndev, apc->num_queues);
1643 if (err)
1644 goto destroy_vport;
1645
1646 mana_rss_table_init(apc);
1647
1648 err = mana_config_rss(apc, TRI_STATE_TRUE, true, true);
1649 if (err)
1650 goto destroy_vport;
1651
1652 return 0;
1653
1654destroy_vport:
1655 mana_destroy_vport(apc);
1656 return err;
1657}
1658
1659int mana_attach(struct net_device *ndev)
1660{
1661 struct mana_port_context *apc = netdev_priv(ndev);
1662 int err;
1663
1664 ASSERT_RTNL();
1665
1666 err = mana_init_port(ndev);
1667 if (err)
1668 return err;
1669
1670 err = mana_alloc_queues(ndev);
1671 if (err) {
1672 kfree(apc->rxqs);
1673 apc->rxqs = NULL;
1674 return err;
1675 }
1676
1677 netif_device_attach(ndev);
1678
1679 apc->port_is_up = apc->port_st_save;
1680
1681
1682 smp_wmb();
1683
1684 if (apc->port_is_up) {
1685 netif_carrier_on(ndev);
1686 netif_tx_wake_all_queues(ndev);
1687 }
1688
1689 return 0;
1690}
1691
1692static int mana_dealloc_queues(struct net_device *ndev)
1693{
1694 struct mana_port_context *apc = netdev_priv(ndev);
1695 struct mana_txq *txq;
1696 int i, err;
1697
1698 if (apc->port_is_up)
1699 return -EINVAL;
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709 for (i = 0; i < apc->num_queues; i++) {
1710 txq = &apc->tx_qp[i].txq;
1711
1712 while (atomic_read(&txq->pending_sends) > 0)
1713 usleep_range(1000, 2000);
1714 }
1715
1716
1717
1718
1719
1720 apc->rss_state = TRI_STATE_FALSE;
1721 err = mana_config_rss(apc, TRI_STATE_FALSE, false, false);
1722 if (err) {
1723 netdev_err(ndev, "Failed to disable vPort: %d\n", err);
1724 return err;
1725 }
1726
1727
1728 ssleep(1);
1729
1730 mana_destroy_vport(apc);
1731
1732 return 0;
1733}
1734
1735int mana_detach(struct net_device *ndev, bool from_close)
1736{
1737 struct mana_port_context *apc = netdev_priv(ndev);
1738 int err;
1739
1740 ASSERT_RTNL();
1741
1742 apc->port_st_save = apc->port_is_up;
1743 apc->port_is_up = false;
1744
1745
1746 smp_wmb();
1747
1748 netif_tx_disable(ndev);
1749 netif_carrier_off(ndev);
1750
1751 if (apc->port_st_save) {
1752 err = mana_dealloc_queues(ndev);
1753 if (err)
1754 return err;
1755 }
1756
1757 if (!from_close) {
1758 netif_device_detach(ndev);
1759 mana_cleanup_port_context(apc);
1760 }
1761
1762 return 0;
1763}
1764
1765static int mana_probe_port(struct mana_context *ac, int port_idx,
1766 struct net_device **ndev_storage)
1767{
1768 struct gdma_context *gc = ac->gdma_dev->gdma_context;
1769 struct mana_port_context *apc;
1770 struct net_device *ndev;
1771 int err;
1772
1773 ndev = alloc_etherdev_mq(sizeof(struct mana_port_context),
1774 gc->max_num_queues);
1775 if (!ndev)
1776 return -ENOMEM;
1777
1778 *ndev_storage = ndev;
1779
1780 apc = netdev_priv(ndev);
1781 apc->ac = ac;
1782 apc->ndev = ndev;
1783 apc->max_queues = gc->max_num_queues;
1784 apc->num_queues = gc->max_num_queues;
1785 apc->port_handle = INVALID_MANA_HANDLE;
1786 apc->port_idx = port_idx;
1787
1788 ndev->netdev_ops = &mana_devops;
1789 ndev->ethtool_ops = &mana_ethtool_ops;
1790 ndev->mtu = ETH_DATA_LEN;
1791 ndev->max_mtu = ndev->mtu;
1792 ndev->min_mtu = ndev->mtu;
1793 ndev->needed_headroom = MANA_HEADROOM;
1794 SET_NETDEV_DEV(ndev, gc->dev);
1795
1796 netif_carrier_off(ndev);
1797
1798 netdev_rss_key_fill(apc->hashkey, MANA_HASH_KEY_SIZE);
1799
1800 err = mana_init_port(ndev);
1801 if (err)
1802 goto free_net;
1803
1804 netdev_lockdep_set_classes(ndev);
1805
1806 ndev->hw_features = NETIF_F_SG | NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
1807 ndev->hw_features |= NETIF_F_RXCSUM;
1808 ndev->hw_features |= NETIF_F_TSO | NETIF_F_TSO6;
1809 ndev->hw_features |= NETIF_F_RXHASH;
1810 ndev->features = ndev->hw_features;
1811 ndev->vlan_features = 0;
1812
1813 err = register_netdev(ndev);
1814 if (err) {
1815 netdev_err(ndev, "Unable to register netdev.\n");
1816 goto reset_apc;
1817 }
1818
1819 return 0;
1820
1821reset_apc:
1822 kfree(apc->rxqs);
1823 apc->rxqs = NULL;
1824free_net:
1825 *ndev_storage = NULL;
1826 netdev_err(ndev, "Failed to probe vPort %d: %d\n", port_idx, err);
1827 free_netdev(ndev);
1828 return err;
1829}
1830
1831int mana_probe(struct gdma_dev *gd)
1832{
1833 struct gdma_context *gc = gd->gdma_context;
1834 struct device *dev = gc->dev;
1835 struct mana_context *ac;
1836 int err;
1837 int i;
1838
1839 dev_info(dev,
1840 "Microsoft Azure Network Adapter protocol version: %d.%d.%d\n",
1841 MANA_MAJOR_VERSION, MANA_MINOR_VERSION, MANA_MICRO_VERSION);
1842
1843 err = mana_gd_register_device(gd);
1844 if (err)
1845 return err;
1846
1847 ac = kzalloc(sizeof(*ac), GFP_KERNEL);
1848 if (!ac)
1849 return -ENOMEM;
1850
1851 ac->gdma_dev = gd;
1852 ac->num_ports = 1;
1853 gd->driver_data = ac;
1854
1855 err = mana_create_eq(ac);
1856 if (err)
1857 goto out;
1858
1859 err = mana_query_device_cfg(ac, MANA_MAJOR_VERSION, MANA_MINOR_VERSION,
1860 MANA_MICRO_VERSION, &ac->num_ports);
1861 if (err)
1862 goto out;
1863
1864 if (ac->num_ports > MAX_PORTS_IN_MANA_DEV)
1865 ac->num_ports = MAX_PORTS_IN_MANA_DEV;
1866
1867 for (i = 0; i < ac->num_ports; i++) {
1868 err = mana_probe_port(ac, i, &ac->ports[i]);
1869 if (err)
1870 break;
1871 }
1872out:
1873 if (err)
1874 mana_remove(gd);
1875
1876 return err;
1877}
1878
1879void mana_remove(struct gdma_dev *gd)
1880{
1881 struct gdma_context *gc = gd->gdma_context;
1882 struct mana_context *ac = gd->driver_data;
1883 struct device *dev = gc->dev;
1884 struct net_device *ndev;
1885 int i;
1886
1887 for (i = 0; i < ac->num_ports; i++) {
1888 ndev = ac->ports[i];
1889 if (!ndev) {
1890 if (i == 0)
1891 dev_err(dev, "No net device to remove\n");
1892 goto out;
1893 }
1894
1895
1896
1897
1898 rtnl_lock();
1899
1900 mana_detach(ndev, false);
1901
1902 unregister_netdevice(ndev);
1903
1904 rtnl_unlock();
1905
1906 free_netdev(ndev);
1907 }
1908
1909 mana_destroy_eq(ac);
1910
1911out:
1912 mana_gd_deregister_device(gd);
1913 gd->driver_data = NULL;
1914 gd->gdma_context = NULL;
1915 kfree(ac);
1916}
1917
