1 // SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
2 /* Copyright (c) 2021, Microsoft Corporation. */
3
4 #include <uapi/linux/bpf.h>
5
6 #include <linux/debugfs.h>
7 #include <linux/inetdevice.h>
8 #include <linux/etherdevice.h>
9 #include <linux/ethtool.h>
10 #include <linux/filter.h>
11 #include <linux/mm.h>
12 #include <linux/pci.h>
13 #include <linux/export.h>
14 #include <linux/skbuff.h>
15
16 #include <net/checksum.h>
17 #include <net/ip6_checksum.h>
18 #include <net/netdev_lock.h>
19 #include <net/page_pool/helpers.h>
20 #include <net/xdp.h>
21
22 #include <net/mana/mana.h>
23 #include <net/mana/mana_auxiliary.h>
24 #include <net/mana/hw_channel.h>
25
26 static DEFINE_IDA(mana_adev_ida);
27
mana_adev_idx_alloc(void)28 static int mana_adev_idx_alloc(void)
29 {
30 return ida_alloc(&mana_adev_ida, GFP_KERNEL);
31 }
32
mana_adev_idx_free(int idx)33 static void mana_adev_idx_free(int idx)
34 {
35 ida_free(&mana_adev_ida, idx);
36 }
37
mana_dbg_q_read(struct file * filp,char __user * buf,size_t count,loff_t * pos)38 static ssize_t mana_dbg_q_read(struct file *filp, char __user *buf, size_t count,
39 loff_t *pos)
40 {
41 struct gdma_queue *gdma_q = filp->private_data;
42
43 return simple_read_from_buffer(buf, count, pos, gdma_q->queue_mem_ptr,
44 gdma_q->queue_size);
45 }
46
47 static const struct file_operations mana_dbg_q_fops = {
48 .owner = THIS_MODULE,
49 .open = simple_open,
50 .read = mana_dbg_q_read,
51 };
52
mana_en_need_log(struct mana_port_context * apc,int err)53 static bool mana_en_need_log(struct mana_port_context *apc, int err)
54 {
55 if (apc && apc->ac && apc->ac->gdma_dev &&
56 apc->ac->gdma_dev->gdma_context)
57 return mana_need_log(apc->ac->gdma_dev->gdma_context, err);
58 else
59 return true;
60 }
61
mana_put_rx_page(struct mana_rxq * rxq,struct page * page,bool from_pool)62 static void mana_put_rx_page(struct mana_rxq *rxq, struct page *page,
63 bool from_pool)
64 {
65 if (from_pool)
66 page_pool_put_full_page(rxq->page_pool, page, false);
67 else
68 put_page(page);
69 }
70
71 /* Microsoft Azure Network Adapter (MANA) functions */
72
mana_open(struct net_device * ndev)73 static int mana_open(struct net_device *ndev)
74 {
75 struct mana_port_context *apc = netdev_priv(ndev);
76 int err;
77 err = mana_alloc_queues(ndev);
78
79 if (err) {
80 netdev_err(ndev, "%s failed to allocate queues: %d\n", __func__, err);
81 return err;
82 }
83
84 apc->port_is_up = true;
85
86 /* Ensure port state updated before txq state */
87 smp_wmb();
88
89 netif_tx_wake_all_queues(ndev);
90 netdev_dbg(ndev, "%s successful\n", __func__);
91 return 0;
92 }
93
mana_close(struct net_device * ndev)94 static int mana_close(struct net_device *ndev)
95 {
96 struct mana_port_context *apc = netdev_priv(ndev);
97
98 if (!apc->port_is_up)
99 return 0;
100
101 return mana_detach(ndev, true);
102 }
103
mana_link_state_handle(struct work_struct * w)104 static void mana_link_state_handle(struct work_struct *w)
105 {
106 struct mana_context *ac;
107 struct net_device *ndev;
108 u32 link_event;
109 bool link_up;
110 int i;
111
112 ac = container_of(w, struct mana_context, link_change_work);
113
114 rtnl_lock();
115
116 link_event = READ_ONCE(ac->link_event);
117
118 if (link_event == HWC_DATA_HW_LINK_CONNECT)
119 link_up = true;
120 else if (link_event == HWC_DATA_HW_LINK_DISCONNECT)
121 link_up = false;
122 else
123 goto out;
124
125 /* Process all ports */
126 for (i = 0; i < ac->num_ports; i++) {
127 ndev = ac->ports[i];
128 if (!ndev)
129 continue;
130
131 if (link_up) {
132 netif_carrier_on(ndev);
133
134 __netdev_notify_peers(ndev);
135 } else {
136 netif_carrier_off(ndev);
137 }
138 }
139
140 out:
141 rtnl_unlock();
142 }
143
mana_can_tx(struct gdma_queue * wq)144 static bool mana_can_tx(struct gdma_queue *wq)
145 {
146 return mana_gd_wq_avail_space(wq) >= MAX_TX_WQE_SIZE;
147 }
148
mana_checksum_info(struct sk_buff * skb)149 static unsigned int mana_checksum_info(struct sk_buff *skb)
150 {
151 if (skb->protocol == htons(ETH_P_IP)) {
152 struct iphdr *ip = ip_hdr(skb);
153
154 if (ip->protocol == IPPROTO_TCP)
155 return IPPROTO_TCP;
156
157 if (ip->protocol == IPPROTO_UDP)
158 return IPPROTO_UDP;
159 } else if (skb->protocol == htons(ETH_P_IPV6)) {
160 struct ipv6hdr *ip6 = ipv6_hdr(skb);
161
162 if (ip6->nexthdr == IPPROTO_TCP)
163 return IPPROTO_TCP;
164
165 if (ip6->nexthdr == IPPROTO_UDP)
166 return IPPROTO_UDP;
167 }
168
169 /* No csum offloading */
170 return 0;
171 }
172
mana_add_sge(struct mana_tx_package * tp,struct mana_skb_head * ash,int sg_i,dma_addr_t da,int sge_len,u32 gpa_mkey)173 static void mana_add_sge(struct mana_tx_package *tp, struct mana_skb_head *ash,
174 int sg_i, dma_addr_t da, int sge_len, u32 gpa_mkey)
175 {
176 ash->dma_handle[sg_i] = da;
177 ash->size[sg_i] = sge_len;
178
179 tp->wqe_req.sgl[sg_i].address = da;
180 tp->wqe_req.sgl[sg_i].mem_key = gpa_mkey;
181 tp->wqe_req.sgl[sg_i].size = sge_len;
182 }
183
mana_map_skb(struct sk_buff * skb,struct mana_port_context * apc,struct mana_tx_package * tp,int gso_hs)184 static int mana_map_skb(struct sk_buff *skb, struct mana_port_context *apc,
185 struct mana_tx_package *tp, int gso_hs)
186 {
187 struct mana_skb_head *ash = (struct mana_skb_head *)skb->head;
188 int hsg = 1; /* num of SGEs of linear part */
189 struct gdma_dev *gd = apc->ac->gdma_dev;
190 int skb_hlen = skb_headlen(skb);
191 int sge0_len, sge1_len = 0;
192 struct gdma_context *gc;
193 struct device *dev;
194 skb_frag_t *frag;
195 dma_addr_t da;
196 int sg_i;
197 int i;
198
199 gc = gd->gdma_context;
200 dev = gc->dev;
201
202 if (gso_hs && gso_hs < skb_hlen) {
203 sge0_len = gso_hs;
204 sge1_len = skb_hlen - gso_hs;
205 } else {
206 sge0_len = skb_hlen;
207 }
208
209 da = dma_map_single(dev, skb->data, sge0_len, DMA_TO_DEVICE);
210 if (dma_mapping_error(dev, da))
211 return -ENOMEM;
212
213 mana_add_sge(tp, ash, 0, da, sge0_len, gd->gpa_mkey);
214
215 if (sge1_len) {
216 sg_i = 1;
217 da = dma_map_single(dev, skb->data + sge0_len, sge1_len,
218 DMA_TO_DEVICE);
219 if (dma_mapping_error(dev, da))
220 goto frag_err;
221
222 mana_add_sge(tp, ash, sg_i, da, sge1_len, gd->gpa_mkey);
223 hsg = 2;
224 }
225
226 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
227 sg_i = hsg + i;
228
229 frag = &skb_shinfo(skb)->frags[i];
230 da = skb_frag_dma_map(dev, frag, 0, skb_frag_size(frag),
231 DMA_TO_DEVICE);
232 if (dma_mapping_error(dev, da))
233 goto frag_err;
234
235 mana_add_sge(tp, ash, sg_i, da, skb_frag_size(frag),
236 gd->gpa_mkey);
237 }
238
239 return 0;
240
241 frag_err:
242 if (net_ratelimit())
243 netdev_err(apc->ndev, "Failed to map skb of size %u to DMA\n",
244 skb->len);
245 for (i = sg_i - 1; i >= hsg; i--)
246 dma_unmap_page(dev, ash->dma_handle[i], ash->size[i],
247 DMA_TO_DEVICE);
248
249 for (i = hsg - 1; i >= 0; i--)
250 dma_unmap_single(dev, ash->dma_handle[i], ash->size[i],
251 DMA_TO_DEVICE);
252
253 return -ENOMEM;
254 }
255
256 /* Handle the case when GSO SKB linear length is too large.
257 * MANA NIC requires GSO packets to put only the packet header to SGE0.
258 * So, we need 2 SGEs for the skb linear part which contains more than the
259 * header.
260 * Return a positive value for the number of SGEs, or a negative value
261 * for an error.
262 */
mana_fix_skb_head(struct net_device * ndev,struct sk_buff * skb,int gso_hs)263 static int mana_fix_skb_head(struct net_device *ndev, struct sk_buff *skb,
264 int gso_hs)
265 {
266 int num_sge = 1 + skb_shinfo(skb)->nr_frags;
267 int skb_hlen = skb_headlen(skb);
268
269 if (gso_hs < skb_hlen) {
270 num_sge++;
271 } else if (gso_hs > skb_hlen) {
272 if (net_ratelimit())
273 netdev_err(ndev,
274 "TX nonlinear head: hs:%d, skb_hlen:%d\n",
275 gso_hs, skb_hlen);
276
277 return -EINVAL;
278 }
279
280 return num_sge;
281 }
282
283 /* Get the GSO packet's header size */
mana_get_gso_hs(struct sk_buff * skb)284 static int mana_get_gso_hs(struct sk_buff *skb)
285 {
286 int gso_hs;
287
288 if (skb->encapsulation) {
289 gso_hs = skb_inner_tcp_all_headers(skb);
290 } else {
291 if (skb_shinfo(skb)->gso_type & SKB_GSO_UDP_L4) {
292 gso_hs = skb_transport_offset(skb) +
293 sizeof(struct udphdr);
294 } else {
295 gso_hs = skb_tcp_all_headers(skb);
296 }
297 }
298
299 return gso_hs;
300 }
301
mana_per_port_queue_reset_work_handler(struct work_struct * work)302 static void mana_per_port_queue_reset_work_handler(struct work_struct *work)
303 {
304 struct mana_port_context *apc = container_of(work,
305 struct mana_port_context,
306 queue_reset_work);
307 struct net_device *ndev = apc->ndev;
308 int err;
309
310 rtnl_lock();
311
312 /* Pre-allocate buffers to prevent failure in mana_attach later */
313 err = mana_pre_alloc_rxbufs(apc, ndev->mtu, apc->num_queues);
314 if (err) {
315 netdev_err(ndev, "Insufficient memory for reset post tx stall detection\n");
316 goto out;
317 }
318
319 err = mana_detach(ndev, false);
320 if (err) {
321 netdev_err(ndev, "mana_detach failed: %d\n", err);
322 goto dealloc_pre_rxbufs;
323 }
324
325 err = mana_attach(ndev);
326 if (err)
327 netdev_err(ndev, "mana_attach failed: %d\n", err);
328
329 dealloc_pre_rxbufs:
330 mana_pre_dealloc_rxbufs(apc);
331 out:
332 rtnl_unlock();
333 }
334
mana_start_xmit(struct sk_buff * skb,struct net_device * ndev)335 netdev_tx_t mana_start_xmit(struct sk_buff *skb, struct net_device *ndev)
336 {
337 enum mana_tx_pkt_format pkt_fmt = MANA_SHORT_PKT_FMT;
338 struct mana_port_context *apc = netdev_priv(ndev);
339 int gso_hs = 0; /* zero for non-GSO pkts */
340 u16 txq_idx = skb_get_queue_mapping(skb);
341 struct gdma_dev *gd = apc->ac->gdma_dev;
342 bool ipv4 = false, ipv6 = false;
343 struct mana_tx_package pkg = {};
344 struct netdev_queue *net_txq;
345 struct mana_stats_tx *tx_stats;
346 struct gdma_queue *gdma_sq;
347 int err, len, num_gso_seg;
348 unsigned int csum_type;
349 struct mana_txq *txq;
350 struct mana_cq *cq;
351
352 if (unlikely(!apc->port_is_up))
353 goto tx_drop;
354
355 if (skb_cow_head(skb, MANA_HEADROOM))
356 goto tx_drop_count;
357
358 txq = &apc->tx_qp[txq_idx].txq;
359 gdma_sq = txq->gdma_sq;
360 cq = &apc->tx_qp[txq_idx].tx_cq;
361 tx_stats = &txq->stats;
362
363 BUILD_BUG_ON(MAX_TX_WQE_SGL_ENTRIES != MANA_MAX_TX_WQE_SGL_ENTRIES);
364 if (MAX_SKB_FRAGS + 2 > MAX_TX_WQE_SGL_ENTRIES &&
365 skb_shinfo(skb)->nr_frags + 2 > MAX_TX_WQE_SGL_ENTRIES) {
366 /* GSO skb with Hardware SGE limit exceeded is not expected here
367 * as they are handled in mana_features_check() callback
368 */
369 if (skb_linearize(skb)) {
370 netdev_warn_once(ndev, "Failed to linearize skb with nr_frags=%d and is_gso=%d\n",
371 skb_shinfo(skb)->nr_frags,
372 skb_is_gso(skb));
373 goto tx_drop_count;
374 }
375 apc->eth_stats.tx_linear_pkt_cnt++;
376 }
377
378 pkg.tx_oob.s_oob.vcq_num = cq->gdma_id;
379 pkg.tx_oob.s_oob.vsq_frame = txq->vsq_frame;
380
381 if (txq->vp_offset > MANA_SHORT_VPORT_OFFSET_MAX) {
382 pkg.tx_oob.l_oob.long_vp_offset = txq->vp_offset;
383 pkt_fmt = MANA_LONG_PKT_FMT;
384 } else {
385 pkg.tx_oob.s_oob.short_vp_offset = txq->vp_offset;
386 }
387
388 if (skb_vlan_tag_present(skb)) {
389 pkt_fmt = MANA_LONG_PKT_FMT;
390 pkg.tx_oob.l_oob.inject_vlan_pri_tag = 1;
391 pkg.tx_oob.l_oob.pcp = skb_vlan_tag_get_prio(skb);
392 pkg.tx_oob.l_oob.dei = skb_vlan_tag_get_cfi(skb);
393 pkg.tx_oob.l_oob.vlan_id = skb_vlan_tag_get_id(skb);
394 }
395
396 pkg.tx_oob.s_oob.pkt_fmt = pkt_fmt;
397
398 if (pkt_fmt == MANA_SHORT_PKT_FMT) {
399 pkg.wqe_req.inline_oob_size = sizeof(struct mana_tx_short_oob);
400 u64_stats_update_begin(&tx_stats->syncp);
401 tx_stats->short_pkt_fmt++;
402 u64_stats_update_end(&tx_stats->syncp);
403 } else {
404 pkg.wqe_req.inline_oob_size = sizeof(struct mana_tx_oob);
405 u64_stats_update_begin(&tx_stats->syncp);
406 tx_stats->long_pkt_fmt++;
407 u64_stats_update_end(&tx_stats->syncp);
408 }
409
410 pkg.wqe_req.inline_oob_data = &pkg.tx_oob;
411 pkg.wqe_req.flags = 0;
412 pkg.wqe_req.client_data_unit = 0;
413
414 pkg.wqe_req.num_sge = 1 + skb_shinfo(skb)->nr_frags;
415
416 if (skb->protocol == htons(ETH_P_IP))
417 ipv4 = true;
418 else if (skb->protocol == htons(ETH_P_IPV6))
419 ipv6 = true;
420
421 if (skb_is_gso(skb)) {
422 int num_sge;
423
424 gso_hs = mana_get_gso_hs(skb);
425
426 num_sge = mana_fix_skb_head(ndev, skb, gso_hs);
427 if (num_sge > 0)
428 pkg.wqe_req.num_sge = num_sge;
429 else
430 goto tx_drop_count;
431
432 u64_stats_update_begin(&tx_stats->syncp);
433 if (skb->encapsulation) {
434 tx_stats->tso_inner_packets++;
435 tx_stats->tso_inner_bytes += skb->len - gso_hs;
436 } else {
437 tx_stats->tso_packets++;
438 tx_stats->tso_bytes += skb->len - gso_hs;
439 }
440 u64_stats_update_end(&tx_stats->syncp);
441
442 pkg.tx_oob.s_oob.is_outer_ipv4 = ipv4;
443 pkg.tx_oob.s_oob.is_outer_ipv6 = ipv6;
444
445 pkg.tx_oob.s_oob.comp_iphdr_csum = 1;
446 pkg.tx_oob.s_oob.comp_tcp_csum = 1;
447 pkg.tx_oob.s_oob.trans_off = skb_transport_offset(skb);
448
449 pkg.wqe_req.client_data_unit = skb_shinfo(skb)->gso_size;
450 pkg.wqe_req.flags = GDMA_WR_OOB_IN_SGL | GDMA_WR_PAD_BY_SGE0;
451 if (ipv4) {
452 ip_hdr(skb)->tot_len = 0;
453 ip_hdr(skb)->check = 0;
454 tcp_hdr(skb)->check =
455 ~csum_tcpudp_magic(ip_hdr(skb)->saddr,
456 ip_hdr(skb)->daddr, 0,
457 IPPROTO_TCP, 0);
458 } else {
459 ipv6_hdr(skb)->payload_len = 0;
460 tcp_hdr(skb)->check =
461 ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
462 &ipv6_hdr(skb)->daddr, 0,
463 IPPROTO_TCP, 0);
464 }
465 } else if (skb->ip_summed == CHECKSUM_PARTIAL) {
466 csum_type = mana_checksum_info(skb);
467
468 u64_stats_update_begin(&tx_stats->syncp);
469 tx_stats->csum_partial++;
470 u64_stats_update_end(&tx_stats->syncp);
471
472 if (csum_type == IPPROTO_TCP) {
473 pkg.tx_oob.s_oob.is_outer_ipv4 = ipv4;
474 pkg.tx_oob.s_oob.is_outer_ipv6 = ipv6;
475
476 pkg.tx_oob.s_oob.comp_tcp_csum = 1;
477 pkg.tx_oob.s_oob.trans_off = skb_transport_offset(skb);
478
479 } else if (csum_type == IPPROTO_UDP) {
480 pkg.tx_oob.s_oob.is_outer_ipv4 = ipv4;
481 pkg.tx_oob.s_oob.is_outer_ipv6 = ipv6;
482
483 pkg.tx_oob.s_oob.comp_udp_csum = 1;
484 } else {
485 /* Can't do offload of this type of checksum */
486 if (skb_checksum_help(skb))
487 goto tx_drop_count;
488 }
489 }
490
491 if (pkg.wqe_req.num_sge <= ARRAY_SIZE(pkg.sgl_array)) {
492 pkg.wqe_req.sgl = pkg.sgl_array;
493 } else {
494 pkg.sgl_ptr = kmalloc_objs(struct gdma_sge, pkg.wqe_req.num_sge,
495 GFP_ATOMIC);
496 if (!pkg.sgl_ptr)
497 goto tx_drop_count;
498
499 pkg.wqe_req.sgl = pkg.sgl_ptr;
500 }
501
502 if (mana_map_skb(skb, apc, &pkg, gso_hs)) {
503 u64_stats_update_begin(&tx_stats->syncp);
504 tx_stats->mana_map_err++;
505 u64_stats_update_end(&tx_stats->syncp);
506 goto free_sgl_ptr;
507 }
508
509 skb_queue_tail(&txq->pending_skbs, skb);
510
511 len = skb->len;
512 num_gso_seg = skb_is_gso(skb) ? skb_shinfo(skb)->gso_segs : 1;
513 net_txq = netdev_get_tx_queue(ndev, txq_idx);
514
515 err = mana_gd_post_work_request(gdma_sq, &pkg.wqe_req,
516 (struct gdma_posted_wqe_info *)skb->cb);
517 if (!mana_can_tx(gdma_sq)) {
518 netif_tx_stop_queue(net_txq);
519 apc->eth_stats.stop_queue++;
520 }
521
522 if (err) {
523 (void)skb_dequeue_tail(&txq->pending_skbs);
524 mana_unmap_skb(skb, apc);
525 netdev_warn(ndev, "Failed to post TX OOB: %d\n", err);
526 goto free_sgl_ptr;
527 }
528
529 err = NETDEV_TX_OK;
530 atomic_inc(&txq->pending_sends);
531
532 mana_gd_wq_ring_doorbell(gd->gdma_context, gdma_sq);
533
534 /* skb may be freed after mana_gd_post_work_request. Do not use it. */
535 skb = NULL;
536
537 /* Populated the packet and bytes counters based on post GSO packet
538 * calculations
539 */
540 tx_stats = &txq->stats;
541 u64_stats_update_begin(&tx_stats->syncp);
542 tx_stats->packets += num_gso_seg;
543 tx_stats->bytes += len + ((num_gso_seg - 1) * gso_hs);
544 u64_stats_update_end(&tx_stats->syncp);
545
546 if (netif_tx_queue_stopped(net_txq) && mana_can_tx(gdma_sq)) {
547 netif_tx_wake_queue(net_txq);
548 apc->eth_stats.wake_queue++;
549 }
550
551 kfree(pkg.sgl_ptr);
552 return err;
553
554 free_sgl_ptr:
555 kfree(pkg.sgl_ptr);
556 tx_drop_count:
557 ndev->stats.tx_dropped++;
558 tx_drop:
559 dev_kfree_skb_any(skb);
560 return NETDEV_TX_OK;
561 }
562
563 #if (MAX_SKB_FRAGS + 2 > MANA_MAX_TX_WQE_SGL_ENTRIES)
mana_features_check(struct sk_buff * skb,struct net_device * ndev,netdev_features_t features)564 static netdev_features_t mana_features_check(struct sk_buff *skb,
565 struct net_device *ndev,
566 netdev_features_t features)
567 {
568 if (skb_shinfo(skb)->nr_frags + 2 > MAX_TX_WQE_SGL_ENTRIES) {
569 /* Exceeds HW SGE limit.
570 * GSO case:
571 * Disable GSO so the stack will software-segment the skb
572 * into smaller skbs that fit the SGE budget.
573 * Non-GSO case:
574 * The xmit path will attempt skb_linearize() as a fallback.
575 */
576 features &= ~NETIF_F_GSO_MASK;
577 }
578 return features;
579 }
580 #endif
581
mana_get_stats64(struct net_device * ndev,struct rtnl_link_stats64 * st)582 static void mana_get_stats64(struct net_device *ndev,
583 struct rtnl_link_stats64 *st)
584 {
585 struct mana_port_context *apc = netdev_priv(ndev);
586 unsigned int num_queues = apc->num_queues;
587 struct mana_stats_rx *rx_stats;
588 struct mana_stats_tx *tx_stats;
589 unsigned int start;
590 u64 packets, bytes;
591 int q;
592
593 if (!apc->port_is_up)
594 return;
595
596 netdev_stats_to_stats64(st, &ndev->stats);
597
598 if (apc->ac->hwc_timeout_occurred)
599 netdev_warn_once(ndev, "HWC timeout occurred\n");
600
601 st->rx_missed_errors = apc->ac->hc_stats.hc_rx_discards_no_wqe;
602
603 for (q = 0; q < num_queues; q++) {
604 rx_stats = &apc->rxqs[q]->stats;
605
606 do {
607 start = u64_stats_fetch_begin(&rx_stats->syncp);
608 packets = rx_stats->packets;
609 bytes = rx_stats->bytes;
610 } while (u64_stats_fetch_retry(&rx_stats->syncp, start));
611
612 st->rx_packets += packets;
613 st->rx_bytes += bytes;
614 }
615
616 for (q = 0; q < num_queues; q++) {
617 tx_stats = &apc->tx_qp[q].txq.stats;
618
619 do {
620 start = u64_stats_fetch_begin(&tx_stats->syncp);
621 packets = tx_stats->packets;
622 bytes = tx_stats->bytes;
623 } while (u64_stats_fetch_retry(&tx_stats->syncp, start));
624
625 st->tx_packets += packets;
626 st->tx_bytes += bytes;
627 }
628 }
629
mana_get_tx_queue(struct net_device * ndev,struct sk_buff * skb,int old_q)630 static int mana_get_tx_queue(struct net_device *ndev, struct sk_buff *skb,
631 int old_q)
632 {
633 struct mana_port_context *apc = netdev_priv(ndev);
634 u32 hash = skb_get_hash(skb);
635 struct sock *sk = skb->sk;
636 int txq;
637
638 txq = apc->indir_table[hash & (apc->indir_table_sz - 1)];
639
640 if (txq != old_q && sk && sk_fullsock(sk) &&
641 rcu_access_pointer(sk->sk_dst_cache))
642 sk_tx_queue_set(sk, txq);
643
644 return txq;
645 }
646
mana_select_queue(struct net_device * ndev,struct sk_buff * skb,struct net_device * sb_dev)647 static u16 mana_select_queue(struct net_device *ndev, struct sk_buff *skb,
648 struct net_device *sb_dev)
649 {
650 int txq;
651
652 if (ndev->real_num_tx_queues == 1)
653 return 0;
654
655 txq = sk_tx_queue_get(skb->sk);
656
657 if (txq < 0 || skb->ooo_okay || txq >= ndev->real_num_tx_queues) {
658 if (skb_rx_queue_recorded(skb))
659 txq = skb_get_rx_queue(skb);
660 else
661 txq = mana_get_tx_queue(ndev, skb, txq);
662 }
663
664 return txq;
665 }
666
667 /* Release pre-allocated RX buffers */
mana_pre_dealloc_rxbufs(struct mana_port_context * mpc)668 void mana_pre_dealloc_rxbufs(struct mana_port_context *mpc)
669 {
670 struct device *dev;
671 int i;
672
673 dev = mpc->ac->gdma_dev->gdma_context->dev;
674
675 if (!mpc->rxbufs_pre)
676 goto out1;
677
678 if (!mpc->das_pre)
679 goto out2;
680
681 while (mpc->rxbpre_total) {
682 i = --mpc->rxbpre_total;
683 dma_unmap_single(dev, mpc->das_pre[i], mpc->rxbpre_datasize,
684 DMA_FROM_DEVICE);
685 put_page(virt_to_head_page(mpc->rxbufs_pre[i]));
686 }
687
688 kfree(mpc->das_pre);
689 mpc->das_pre = NULL;
690
691 out2:
692 kfree(mpc->rxbufs_pre);
693 mpc->rxbufs_pre = NULL;
694
695 out1:
696 mpc->rxbpre_datasize = 0;
697 mpc->rxbpre_alloc_size = 0;
698 mpc->rxbpre_headroom = 0;
699 }
700
701 /* Get a buffer from the pre-allocated RX buffers */
mana_get_rxbuf_pre(struct mana_rxq * rxq,dma_addr_t * da)702 static void *mana_get_rxbuf_pre(struct mana_rxq *rxq, dma_addr_t *da)
703 {
704 struct net_device *ndev = rxq->ndev;
705 struct mana_port_context *mpc;
706 void *va;
707
708 mpc = netdev_priv(ndev);
709
710 if (!mpc->rxbufs_pre || !mpc->das_pre || !mpc->rxbpre_total) {
711 netdev_err(ndev, "No RX pre-allocated bufs\n");
712 return NULL;
713 }
714
715 /* Check sizes to catch unexpected coding error */
716 if (mpc->rxbpre_datasize != rxq->datasize) {
717 netdev_err(ndev, "rxbpre_datasize mismatch: %u: %u\n",
718 mpc->rxbpre_datasize, rxq->datasize);
719 return NULL;
720 }
721
722 if (mpc->rxbpre_alloc_size != rxq->alloc_size) {
723 netdev_err(ndev, "rxbpre_alloc_size mismatch: %u: %u\n",
724 mpc->rxbpre_alloc_size, rxq->alloc_size);
725 return NULL;
726 }
727
728 if (mpc->rxbpre_headroom != rxq->headroom) {
729 netdev_err(ndev, "rxbpre_headroom mismatch: %u: %u\n",
730 mpc->rxbpre_headroom, rxq->headroom);
731 return NULL;
732 }
733
734 mpc->rxbpre_total--;
735
736 *da = mpc->das_pre[mpc->rxbpre_total];
737 va = mpc->rxbufs_pre[mpc->rxbpre_total];
738 mpc->rxbufs_pre[mpc->rxbpre_total] = NULL;
739
740 /* Deallocate the array after all buffers are gone */
741 if (!mpc->rxbpre_total)
742 mana_pre_dealloc_rxbufs(mpc);
743
744 return va;
745 }
746
747 /* Get RX buffer's data size, alloc size, XDP headroom based on MTU */
mana_get_rxbuf_cfg(struct mana_port_context * apc,int mtu,u32 * datasize,u32 * alloc_size,u32 * headroom,u32 * frag_count)748 static void mana_get_rxbuf_cfg(struct mana_port_context *apc,
749 int mtu, u32 *datasize, u32 *alloc_size,
750 u32 *headroom, u32 *frag_count)
751 {
752 u32 len, buf_size;
753
754 /* Calculate datasize first (consistent across all cases) */
755 *datasize = mtu + ETH_HLEN;
756
757 /* For xdp and jumbo frames make sure only one packet fits per page */
758 if (mtu + MANA_RXBUF_PAD > PAGE_SIZE / 2 || mana_xdp_get(apc)) {
759 if (mana_xdp_get(apc)) {
760 *headroom = XDP_PACKET_HEADROOM;
761 *alloc_size = PAGE_SIZE;
762 } else {
763 *headroom = 0; /* no support for XDP */
764 *alloc_size = SKB_DATA_ALIGN(mtu + MANA_RXBUF_PAD +
765 *headroom);
766 }
767
768 *frag_count = 1;
769
770 /* In the single-buffer path, napi_build_skb() must see the
771 * actual backing allocation size so skb->truesize reflects
772 * the full page (or higher-order page), not just the usable
773 * packet area.
774 */
775 *alloc_size = PAGE_SIZE << get_order(*alloc_size);
776 return;
777 }
778
779 /* Standard MTU case - optimize for multiple packets per page */
780 *headroom = 0;
781
782 /* Calculate base buffer size needed */
783 len = SKB_DATA_ALIGN(mtu + MANA_RXBUF_PAD + *headroom);
784 buf_size = ALIGN(len, MANA_RX_FRAG_ALIGNMENT);
785
786 /* Calculate how many packets can fit in a page */
787 *frag_count = PAGE_SIZE / buf_size;
788 *alloc_size = buf_size;
789 }
790
mana_pre_alloc_rxbufs(struct mana_port_context * mpc,int new_mtu,int num_queues)791 int mana_pre_alloc_rxbufs(struct mana_port_context *mpc, int new_mtu, int num_queues)
792 {
793 struct device *dev;
794 struct page *page;
795 dma_addr_t da;
796 int num_rxb;
797 void *va;
798 int i;
799
800 mana_get_rxbuf_cfg(mpc, new_mtu, &mpc->rxbpre_datasize,
801 &mpc->rxbpre_alloc_size, &mpc->rxbpre_headroom,
802 &mpc->rxbpre_frag_count);
803
804 dev = mpc->ac->gdma_dev->gdma_context->dev;
805
806 num_rxb = num_queues * mpc->rx_queue_size;
807
808 WARN(mpc->rxbufs_pre, "mana rxbufs_pre exists\n");
809 mpc->rxbufs_pre = kmalloc_array(num_rxb, sizeof(void *), GFP_KERNEL);
810 if (!mpc->rxbufs_pre)
811 goto error;
812
813 mpc->das_pre = kmalloc_objs(dma_addr_t, num_rxb);
814 if (!mpc->das_pre)
815 goto error;
816
817 mpc->rxbpre_total = 0;
818
819 for (i = 0; i < num_rxb; i++) {
820 page = dev_alloc_pages(get_order(mpc->rxbpre_alloc_size));
821 if (!page)
822 goto error;
823
824 va = page_to_virt(page);
825
826 da = dma_map_single(dev, va + mpc->rxbpre_headroom,
827 mpc->rxbpre_datasize, DMA_FROM_DEVICE);
828 if (dma_mapping_error(dev, da)) {
829 put_page(page);
830 goto error;
831 }
832
833 mpc->rxbufs_pre[i] = va;
834 mpc->das_pre[i] = da;
835 mpc->rxbpre_total = i + 1;
836 }
837
838 return 0;
839
840 error:
841 netdev_err(mpc->ndev, "Failed to pre-allocate RX buffers for %d queues\n", num_queues);
842 mana_pre_dealloc_rxbufs(mpc);
843 return -ENOMEM;
844 }
845
mana_change_mtu(struct net_device * ndev,int new_mtu)846 static int mana_change_mtu(struct net_device *ndev, int new_mtu)
847 {
848 struct mana_port_context *mpc = netdev_priv(ndev);
849 unsigned int old_mtu = ndev->mtu;
850 int err;
851
852 /* Pre-allocate buffers to prevent failure in mana_attach later */
853 err = mana_pre_alloc_rxbufs(mpc, new_mtu, mpc->num_queues);
854 if (err) {
855 netdev_err(ndev, "Insufficient memory for new MTU\n");
856 return err;
857 }
858
859 err = mana_detach(ndev, false);
860 if (err) {
861 netdev_err(ndev, "mana_detach failed: %d\n", err);
862 goto out;
863 }
864
865 WRITE_ONCE(ndev->mtu, new_mtu);
866
867 err = mana_attach(ndev);
868 if (err) {
869 netdev_err(ndev, "mana_attach failed: %d\n", err);
870 WRITE_ONCE(ndev->mtu, old_mtu);
871 }
872
873 out:
874 mana_pre_dealloc_rxbufs(mpc);
875 return err;
876 }
877
mana_tx_timeout(struct net_device * netdev,unsigned int txqueue)878 static void mana_tx_timeout(struct net_device *netdev, unsigned int txqueue)
879 {
880 struct mana_port_context *apc = netdev_priv(netdev);
881 struct mana_context *ac = apc->ac;
882 struct gdma_context *gc = ac->gdma_dev->gdma_context;
883
884 /* Already in service, hence tx queue reset is not required.*/
885 if (gc->in_service)
886 return;
887
888 /* Note: If there are pending queue reset work for this port(apc),
889 * subsequent request queued up from here are ignored. This is because
890 * we are using the same work instance per port(apc).
891 */
892 queue_work(ac->per_port_queue_reset_wq, &apc->queue_reset_work);
893 }
894
mana_shaper_set(struct net_shaper_binding * binding,const struct net_shaper * shaper,struct netlink_ext_ack * extack)895 static int mana_shaper_set(struct net_shaper_binding *binding,
896 const struct net_shaper *shaper,
897 struct netlink_ext_ack *extack)
898 {
899 struct mana_port_context *apc = netdev_priv(binding->netdev);
900 u32 old_speed, rate;
901 int err;
902
903 if (shaper->handle.scope != NET_SHAPER_SCOPE_NETDEV) {
904 NL_SET_ERR_MSG_MOD(extack, "net shaper scope should be netdev");
905 return -EINVAL;
906 }
907
908 if (apc->handle.id && shaper->handle.id != apc->handle.id) {
909 NL_SET_ERR_MSG_MOD(extack, "Cannot create multiple shapers");
910 return -EOPNOTSUPP;
911 }
912
913 if (!shaper->bw_max || (shaper->bw_max % 100000000)) {
914 NL_SET_ERR_MSG_MOD(extack, "Please use multiples of 100Mbps for bandwidth");
915 return -EINVAL;
916 }
917
918 rate = div_u64(shaper->bw_max, 1000); /* Convert bps to Kbps */
919 rate = div_u64(rate, 1000); /* Convert Kbps to Mbps */
920
921 /* Get current speed */
922 err = mana_query_link_cfg(apc);
923 old_speed = (err) ? SPEED_UNKNOWN : apc->speed;
924
925 if (!err) {
926 err = mana_set_bw_clamp(apc, rate, TRI_STATE_TRUE);
927 apc->speed = (err) ? old_speed : rate;
928 apc->handle = (err) ? apc->handle : shaper->handle;
929 }
930
931 return err;
932 }
933
mana_shaper_del(struct net_shaper_binding * binding,const struct net_shaper_handle * handle,struct netlink_ext_ack * extack)934 static int mana_shaper_del(struct net_shaper_binding *binding,
935 const struct net_shaper_handle *handle,
936 struct netlink_ext_ack *extack)
937 {
938 struct mana_port_context *apc = netdev_priv(binding->netdev);
939 int err;
940
941 err = mana_set_bw_clamp(apc, 0, TRI_STATE_FALSE);
942
943 if (!err) {
944 /* Reset mana port context parameters */
945 apc->handle.id = 0;
946 apc->handle.scope = NET_SHAPER_SCOPE_UNSPEC;
947 apc->speed = apc->max_speed;
948 }
949
950 return err;
951 }
952
mana_shaper_cap(struct net_shaper_binding * binding,enum net_shaper_scope scope,unsigned long * flags)953 static void mana_shaper_cap(struct net_shaper_binding *binding,
954 enum net_shaper_scope scope,
955 unsigned long *flags)
956 {
957 *flags = BIT(NET_SHAPER_A_CAPS_SUPPORT_BW_MAX) |
958 BIT(NET_SHAPER_A_CAPS_SUPPORT_METRIC_BPS);
959 }
960
961 static const struct net_shaper_ops mana_shaper_ops = {
962 .set = mana_shaper_set,
963 .delete = mana_shaper_del,
964 .capabilities = mana_shaper_cap,
965 };
966
967 static const struct net_device_ops mana_devops = {
968 .ndo_open = mana_open,
969 .ndo_stop = mana_close,
970 .ndo_select_queue = mana_select_queue,
971 #if (MAX_SKB_FRAGS + 2 > MANA_MAX_TX_WQE_SGL_ENTRIES)
972 .ndo_features_check = mana_features_check,
973 #endif
974 .ndo_start_xmit = mana_start_xmit,
975 .ndo_validate_addr = eth_validate_addr,
976 .ndo_get_stats64 = mana_get_stats64,
977 .ndo_bpf = mana_bpf,
978 .ndo_xdp_xmit = mana_xdp_xmit,
979 .ndo_change_mtu = mana_change_mtu,
980 .ndo_tx_timeout = mana_tx_timeout,
981 .net_shaper_ops = &mana_shaper_ops,
982 };
983
mana_cleanup_port_context(struct mana_port_context * apc)984 static void mana_cleanup_port_context(struct mana_port_context *apc)
985 {
986 /*
987 * make sure subsequent cleanup attempts don't end up removing already
988 * cleaned dentry pointer
989 */
990 debugfs_remove(apc->mana_port_debugfs);
991 apc->mana_port_debugfs = NULL;
992 kfree(apc->rxqs);
993 apc->rxqs = NULL;
994 }
995
mana_cleanup_indir_table(struct mana_port_context * apc)996 static void mana_cleanup_indir_table(struct mana_port_context *apc)
997 {
998 apc->indir_table_sz = 0;
999 kfree(apc->indir_table);
1000 kfree(apc->rxobj_table);
1001 }
1002
mana_init_port_context(struct mana_port_context * apc)1003 static int mana_init_port_context(struct mana_port_context *apc)
1004 {
1005 apc->rxqs = kzalloc_objs(struct mana_rxq *, apc->num_queues);
1006
1007 return !apc->rxqs ? -ENOMEM : 0;
1008 }
1009
mana_send_request(struct mana_context * ac,void * in_buf,u32 in_len,void * out_buf,u32 out_len)1010 static int mana_send_request(struct mana_context *ac, void *in_buf,
1011 u32 in_len, void *out_buf, u32 out_len)
1012 {
1013 struct gdma_context *gc = ac->gdma_dev->gdma_context;
1014 struct gdma_resp_hdr *resp = out_buf;
1015 struct gdma_req_hdr *req = in_buf;
1016 struct device *dev = gc->dev;
1017 static atomic_t activity_id;
1018 int err;
1019
1020 req->dev_id = gc->mana.dev_id;
1021 req->activity_id = atomic_inc_return(&activity_id);
1022
1023 err = mana_gd_send_request(gc, in_len, in_buf, out_len,
1024 out_buf);
1025 if (err || resp->status) {
1026 if (err == -EOPNOTSUPP)
1027 return err;
1028
1029 if (req->req.msg_type != MANA_QUERY_PHY_STAT &&
1030 mana_need_log(gc, err))
1031 dev_err(dev, "Failed to send mana message: %d, 0x%x\n",
1032 err, resp->status);
1033 return err ? err : -EPROTO;
1034 }
1035
1036 if (req->dev_id.as_uint32 != resp->dev_id.as_uint32 ||
1037 req->activity_id != resp->activity_id) {
1038 dev_err(dev, "Unexpected mana message response: %x,%x,%x,%x\n",
1039 req->dev_id.as_uint32, resp->dev_id.as_uint32,
1040 req->activity_id, resp->activity_id);
1041 return -EPROTO;
1042 }
1043
1044 return 0;
1045 }
1046
mana_verify_resp_hdr(const struct gdma_resp_hdr * resp_hdr,const enum mana_command_code expected_code,const u32 min_size)1047 static int mana_verify_resp_hdr(const struct gdma_resp_hdr *resp_hdr,
1048 const enum mana_command_code expected_code,
1049 const u32 min_size)
1050 {
1051 if (resp_hdr->response.msg_type != expected_code)
1052 return -EPROTO;
1053
1054 if (resp_hdr->response.msg_version < GDMA_MESSAGE_V1)
1055 return -EPROTO;
1056
1057 if (resp_hdr->response.msg_size < min_size)
1058 return -EPROTO;
1059
1060 return 0;
1061 }
1062
mana_pf_register_hw_vport(struct mana_port_context * apc)1063 static int mana_pf_register_hw_vport(struct mana_port_context *apc)
1064 {
1065 struct mana_register_hw_vport_resp resp = {};
1066 struct mana_register_hw_vport_req req = {};
1067 int err;
1068
1069 mana_gd_init_req_hdr(&req.hdr, MANA_REGISTER_HW_PORT,
1070 sizeof(req), sizeof(resp));
1071 req.attached_gfid = 1;
1072 req.is_pf_default_vport = 1;
1073 req.allow_all_ether_types = 1;
1074
1075 err = mana_send_request(apc->ac, &req, sizeof(req), &resp,
1076 sizeof(resp));
1077 if (err) {
1078 netdev_err(apc->ndev, "Failed to register hw vPort: %d\n", err);
1079 return err;
1080 }
1081
1082 err = mana_verify_resp_hdr(&resp.hdr, MANA_REGISTER_HW_PORT,
1083 sizeof(resp));
1084 if (err || resp.hdr.status) {
1085 netdev_err(apc->ndev, "Failed to register hw vPort: %d, 0x%x\n",
1086 err, resp.hdr.status);
1087 return err ? err : -EPROTO;
1088 }
1089
1090 apc->port_handle = resp.hw_vport_handle;
1091 return 0;
1092 }
1093
mana_pf_deregister_hw_vport(struct mana_port_context * apc)1094 static void mana_pf_deregister_hw_vport(struct mana_port_context *apc)
1095 {
1096 struct mana_deregister_hw_vport_resp resp = {};
1097 struct mana_deregister_hw_vport_req req = {};
1098 int err;
1099
1100 mana_gd_init_req_hdr(&req.hdr, MANA_DEREGISTER_HW_PORT,
1101 sizeof(req), sizeof(resp));
1102 req.hw_vport_handle = apc->port_handle;
1103
1104 err = mana_send_request(apc->ac, &req, sizeof(req), &resp,
1105 sizeof(resp));
1106 if (err) {
1107 if (mana_en_need_log(apc, err))
1108 netdev_err(apc->ndev, "Failed to unregister hw vPort: %d\n",
1109 err);
1110
1111 return;
1112 }
1113
1114 err = mana_verify_resp_hdr(&resp.hdr, MANA_DEREGISTER_HW_PORT,
1115 sizeof(resp));
1116 if (err || resp.hdr.status)
1117 netdev_err(apc->ndev,
1118 "Failed to deregister hw vPort: %d, 0x%x\n",
1119 err, resp.hdr.status);
1120 }
1121
mana_pf_register_filter(struct mana_port_context * apc)1122 static int mana_pf_register_filter(struct mana_port_context *apc)
1123 {
1124 struct mana_register_filter_resp resp = {};
1125 struct mana_register_filter_req req = {};
1126 int err;
1127
1128 mana_gd_init_req_hdr(&req.hdr, MANA_REGISTER_FILTER,
1129 sizeof(req), sizeof(resp));
1130 req.vport = apc->port_handle;
1131 memcpy(req.mac_addr, apc->mac_addr, ETH_ALEN);
1132
1133 err = mana_send_request(apc->ac, &req, sizeof(req), &resp,
1134 sizeof(resp));
1135 if (err) {
1136 netdev_err(apc->ndev, "Failed to register filter: %d\n", err);
1137 return err;
1138 }
1139
1140 err = mana_verify_resp_hdr(&resp.hdr, MANA_REGISTER_FILTER,
1141 sizeof(resp));
1142 if (err || resp.hdr.status) {
1143 netdev_err(apc->ndev, "Failed to register filter: %d, 0x%x\n",
1144 err, resp.hdr.status);
1145 return err ? err : -EPROTO;
1146 }
1147
1148 apc->pf_filter_handle = resp.filter_handle;
1149 return 0;
1150 }
1151
mana_pf_deregister_filter(struct mana_port_context * apc)1152 static void mana_pf_deregister_filter(struct mana_port_context *apc)
1153 {
1154 struct mana_deregister_filter_resp resp = {};
1155 struct mana_deregister_filter_req req = {};
1156 int err;
1157
1158 mana_gd_init_req_hdr(&req.hdr, MANA_DEREGISTER_FILTER,
1159 sizeof(req), sizeof(resp));
1160 req.filter_handle = apc->pf_filter_handle;
1161
1162 err = mana_send_request(apc->ac, &req, sizeof(req), &resp,
1163 sizeof(resp));
1164 if (err) {
1165 if (mana_en_need_log(apc, err))
1166 netdev_err(apc->ndev, "Failed to unregister filter: %d\n",
1167 err);
1168
1169 return;
1170 }
1171
1172 err = mana_verify_resp_hdr(&resp.hdr, MANA_DEREGISTER_FILTER,
1173 sizeof(resp));
1174 if (err || resp.hdr.status)
1175 netdev_err(apc->ndev,
1176 "Failed to deregister filter: %d, 0x%x\n",
1177 err, resp.hdr.status);
1178 }
1179
mana_query_device_cfg(struct mana_context * ac,u32 proto_major_ver,u32 proto_minor_ver,u32 proto_micro_ver,u16 * max_num_vports,u8 * bm_hostmode)1180 static int mana_query_device_cfg(struct mana_context *ac, u32 proto_major_ver,
1181 u32 proto_minor_ver, u32 proto_micro_ver,
1182 u16 *max_num_vports, u8 *bm_hostmode)
1183 {
1184 struct gdma_context *gc = ac->gdma_dev->gdma_context;
1185 struct mana_query_device_cfg_resp resp = {};
1186 struct mana_query_device_cfg_req req = {};
1187 struct device *dev = gc->dev;
1188 int err = 0;
1189
1190 mana_gd_init_req_hdr(&req.hdr, MANA_QUERY_DEV_CONFIG,
1191 sizeof(req), sizeof(resp));
1192
1193 req.hdr.resp.msg_version = GDMA_MESSAGE_V3;
1194
1195 req.proto_major_ver = proto_major_ver;
1196 req.proto_minor_ver = proto_minor_ver;
1197 req.proto_micro_ver = proto_micro_ver;
1198
1199 err = mana_send_request(ac, &req, sizeof(req), &resp, sizeof(resp));
1200 if (err) {
1201 dev_err(dev, "Failed to query config: %d", err);
1202 return err;
1203 }
1204
1205 err = mana_verify_resp_hdr(&resp.hdr, MANA_QUERY_DEV_CONFIG,
1206 sizeof(resp));
1207 if (err || resp.hdr.status) {
1208 dev_err(dev, "Invalid query result: %d, 0x%x\n", err,
1209 resp.hdr.status);
1210 if (!err)
1211 err = -EPROTO;
1212 return err;
1213 }
1214
1215 *max_num_vports = resp.max_num_vports;
1216
1217 if (resp.hdr.response.msg_version >= GDMA_MESSAGE_V2)
1218 gc->adapter_mtu = resp.adapter_mtu;
1219 else
1220 gc->adapter_mtu = ETH_FRAME_LEN;
1221
1222 if (resp.hdr.response.msg_version >= GDMA_MESSAGE_V3)
1223 *bm_hostmode = resp.bm_hostmode;
1224 else
1225 *bm_hostmode = 0;
1226
1227 debugfs_create_u16("adapter-MTU", 0400, gc->mana_pci_debugfs, &gc->adapter_mtu);
1228
1229 return 0;
1230 }
1231
mana_query_vport_cfg(struct mana_port_context * apc,u32 vport_index,u32 * max_sq,u32 * max_rq,u32 * num_indir_entry)1232 static int mana_query_vport_cfg(struct mana_port_context *apc, u32 vport_index,
1233 u32 *max_sq, u32 *max_rq, u32 *num_indir_entry)
1234 {
1235 struct mana_query_vport_cfg_resp resp = {};
1236 struct mana_query_vport_cfg_req req = {};
1237 int err;
1238
1239 mana_gd_init_req_hdr(&req.hdr, MANA_QUERY_VPORT_CONFIG,
1240 sizeof(req), sizeof(resp));
1241
1242 req.vport_index = vport_index;
1243
1244 err = mana_send_request(apc->ac, &req, sizeof(req), &resp,
1245 sizeof(resp));
1246 if (err)
1247 return err;
1248
1249 err = mana_verify_resp_hdr(&resp.hdr, MANA_QUERY_VPORT_CONFIG,
1250 sizeof(resp));
1251 if (err)
1252 return err;
1253
1254 if (resp.hdr.status)
1255 return -EPROTO;
1256
1257 *max_sq = resp.max_num_sq;
1258 *max_rq = resp.max_num_rq;
1259 if (resp.num_indirection_ent > 0 &&
1260 resp.num_indirection_ent <= MANA_INDIRECT_TABLE_MAX_SIZE &&
1261 is_power_of_2(resp.num_indirection_ent)) {
1262 *num_indir_entry = resp.num_indirection_ent;
1263 } else {
1264 netdev_warn(apc->ndev,
1265 "Setting indirection table size to default %d for vPort %d\n",
1266 MANA_INDIRECT_TABLE_DEF_SIZE, apc->port_idx);
1267 *num_indir_entry = MANA_INDIRECT_TABLE_DEF_SIZE;
1268 }
1269
1270 apc->port_handle = resp.vport;
1271 ether_addr_copy(apc->mac_addr, resp.mac_addr);
1272
1273 return 0;
1274 }
1275
mana_uncfg_vport(struct mana_port_context * apc)1276 void mana_uncfg_vport(struct mana_port_context *apc)
1277 {
1278 mutex_lock(&apc->vport_mutex);
1279 apc->vport_use_count--;
1280 WARN_ON(apc->vport_use_count < 0);
1281 mutex_unlock(&apc->vport_mutex);
1282 }
1283 EXPORT_SYMBOL_NS(mana_uncfg_vport, "NET_MANA");
1284
mana_cfg_vport(struct mana_port_context * apc,u32 protection_dom_id,u32 doorbell_pg_id)1285 int mana_cfg_vport(struct mana_port_context *apc, u32 protection_dom_id,
1286 u32 doorbell_pg_id)
1287 {
1288 struct mana_config_vport_resp resp = {};
1289 struct mana_config_vport_req req = {};
1290 int err;
1291
1292 /* This function is used to program the Ethernet port in the hardware
1293 * table. It can be called from the Ethernet driver or the RDMA driver.
1294 *
1295 * For Ethernet usage, the hardware supports only one active user on a
1296 * physical port. The driver checks on the port usage before programming
1297 * the hardware when creating the RAW QP (RDMA driver) or exposing the
1298 * device to kernel NET layer (Ethernet driver).
1299 *
1300 * Because the RDMA driver doesn't know in advance which QP type the
1301 * user will create, it exposes the device with all its ports. The user
1302 * may not be able to create RAW QP on a port if this port is already
1303 * in used by the Ethernet driver from the kernel.
1304 *
1305 * This physical port limitation only applies to the RAW QP. For RC QP,
1306 * the hardware doesn't have this limitation. The user can create RC
1307 * QPs on a physical port up to the hardware limits independent of the
1308 * Ethernet usage on the same port.
1309 */
1310 mutex_lock(&apc->vport_mutex);
1311 if (apc->vport_use_count > 0) {
1312 mutex_unlock(&apc->vport_mutex);
1313 return -EBUSY;
1314 }
1315 apc->vport_use_count++;
1316 mutex_unlock(&apc->vport_mutex);
1317
1318 mana_gd_init_req_hdr(&req.hdr, MANA_CONFIG_VPORT_TX,
1319 sizeof(req), sizeof(resp));
1320 req.vport = apc->port_handle;
1321 req.pdid = protection_dom_id;
1322 req.doorbell_pageid = doorbell_pg_id;
1323
1324 err = mana_send_request(apc->ac, &req, sizeof(req), &resp,
1325 sizeof(resp));
1326 if (err) {
1327 netdev_err(apc->ndev, "Failed to configure vPort: %d\n", err);
1328 goto out;
1329 }
1330
1331 err = mana_verify_resp_hdr(&resp.hdr, MANA_CONFIG_VPORT_TX,
1332 sizeof(resp));
1333 if (err || resp.hdr.status) {
1334 netdev_err(apc->ndev, "Failed to configure vPort: %d, 0x%x\n",
1335 err, resp.hdr.status);
1336 if (!err)
1337 err = -EPROTO;
1338
1339 goto out;
1340 }
1341
1342 apc->tx_shortform_allowed = resp.short_form_allowed;
1343 apc->tx_vp_offset = resp.tx_vport_offset;
1344
1345 netdev_info(apc->ndev, "Configured vPort %llu PD %u DB %u\n",
1346 apc->port_handle, protection_dom_id, doorbell_pg_id);
1347 out:
1348 if (err)
1349 mana_uncfg_vport(apc);
1350
1351 return err;
1352 }
1353 EXPORT_SYMBOL_NS(mana_cfg_vport, "NET_MANA");
1354
mana_cfg_vport_steering(struct mana_port_context * apc,enum TRI_STATE rx,bool update_default_rxobj,bool update_key,bool update_tab)1355 static int mana_cfg_vport_steering(struct mana_port_context *apc,
1356 enum TRI_STATE rx,
1357 bool update_default_rxobj, bool update_key,
1358 bool update_tab)
1359 {
1360 struct mana_cfg_rx_steer_req_v2 *req;
1361 struct mana_cfg_rx_steer_resp resp = {};
1362 struct net_device *ndev = apc->ndev;
1363 u32 req_buf_size;
1364 int err;
1365
1366 req_buf_size = struct_size(req, indir_tab, apc->indir_table_sz);
1367 req = kzalloc(req_buf_size, GFP_KERNEL);
1368 if (!req)
1369 return -ENOMEM;
1370
1371 mana_gd_init_req_hdr(&req->hdr, MANA_CONFIG_VPORT_RX, req_buf_size,
1372 sizeof(resp));
1373
1374 req->hdr.req.msg_version = GDMA_MESSAGE_V2;
1375
1376 req->vport = apc->port_handle;
1377 req->num_indir_entries = apc->indir_table_sz;
1378 req->indir_tab_offset = offsetof(struct mana_cfg_rx_steer_req_v2,
1379 indir_tab);
1380 req->rx_enable = rx;
1381 req->rss_enable = apc->rss_state;
1382 req->update_default_rxobj = update_default_rxobj;
1383 req->update_hashkey = update_key;
1384 req->update_indir_tab = update_tab;
1385 req->default_rxobj = apc->default_rxobj;
1386 req->cqe_coalescing_enable = 0;
1387
1388 if (update_key)
1389 memcpy(&req->hashkey, apc->hashkey, MANA_HASH_KEY_SIZE);
1390
1391 if (update_tab)
1392 memcpy(req->indir_tab, apc->rxobj_table,
1393 flex_array_size(req, indir_tab, req->num_indir_entries));
1394
1395 err = mana_send_request(apc->ac, req, req_buf_size, &resp,
1396 sizeof(resp));
1397 if (err) {
1398 if (mana_en_need_log(apc, err))
1399 netdev_err(ndev, "Failed to configure vPort RX: %d\n", err);
1400
1401 goto out;
1402 }
1403
1404 err = mana_verify_resp_hdr(&resp.hdr, MANA_CONFIG_VPORT_RX,
1405 sizeof(resp));
1406 if (err) {
1407 netdev_err(ndev, "vPort RX configuration failed: %d\n", err);
1408 goto out;
1409 }
1410
1411 if (resp.hdr.status) {
1412 netdev_err(ndev, "vPort RX configuration failed: 0x%x\n",
1413 resp.hdr.status);
1414 err = -EPROTO;
1415 }
1416
1417 netdev_info(ndev, "Configured steering vPort %llu entries %u\n",
1418 apc->port_handle, apc->indir_table_sz);
1419 out:
1420 kfree(req);
1421 return err;
1422 }
1423
mana_query_link_cfg(struct mana_port_context * apc)1424 int mana_query_link_cfg(struct mana_port_context *apc)
1425 {
1426 struct net_device *ndev = apc->ndev;
1427 struct mana_query_link_config_resp resp = {};
1428 struct mana_query_link_config_req req = {};
1429 int err;
1430
1431 mana_gd_init_req_hdr(&req.hdr, MANA_QUERY_LINK_CONFIG,
1432 sizeof(req), sizeof(resp));
1433
1434 req.vport = apc->port_handle;
1435 req.hdr.resp.msg_version = GDMA_MESSAGE_V2;
1436
1437 err = mana_send_request(apc->ac, &req, sizeof(req), &resp,
1438 sizeof(resp));
1439
1440 if (err) {
1441 if (err == -EOPNOTSUPP) {
1442 netdev_info_once(ndev, "MANA_QUERY_LINK_CONFIG not supported\n");
1443 return err;
1444 }
1445 netdev_err(ndev, "Failed to query link config: %d\n", err);
1446 return err;
1447 }
1448
1449 err = mana_verify_resp_hdr(&resp.hdr, MANA_QUERY_LINK_CONFIG,
1450 sizeof(resp));
1451
1452 if (err || resp.hdr.status) {
1453 netdev_err(ndev, "Failed to query link config: %d, 0x%x\n", err,
1454 resp.hdr.status);
1455 if (!err)
1456 err = -EOPNOTSUPP;
1457 return err;
1458 }
1459
1460 if (resp.qos_unconfigured) {
1461 err = -EINVAL;
1462 return err;
1463 }
1464 apc->speed = resp.link_speed_mbps;
1465 apc->max_speed = resp.qos_speed_mbps;
1466 return 0;
1467 }
1468
mana_set_bw_clamp(struct mana_port_context * apc,u32 speed,int enable_clamping)1469 int mana_set_bw_clamp(struct mana_port_context *apc, u32 speed,
1470 int enable_clamping)
1471 {
1472 struct mana_set_bw_clamp_resp resp = {};
1473 struct mana_set_bw_clamp_req req = {};
1474 struct net_device *ndev = apc->ndev;
1475 int err;
1476
1477 mana_gd_init_req_hdr(&req.hdr, MANA_SET_BW_CLAMP,
1478 sizeof(req), sizeof(resp));
1479 req.vport = apc->port_handle;
1480 req.link_speed_mbps = speed;
1481 req.enable_clamping = enable_clamping;
1482
1483 err = mana_send_request(apc->ac, &req, sizeof(req), &resp,
1484 sizeof(resp));
1485
1486 if (err) {
1487 if (err == -EOPNOTSUPP) {
1488 netdev_info_once(ndev, "MANA_SET_BW_CLAMP not supported\n");
1489 return err;
1490 }
1491 netdev_err(ndev, "Failed to set bandwidth clamp for speed %u, err = %d",
1492 speed, err);
1493 return err;
1494 }
1495
1496 err = mana_verify_resp_hdr(&resp.hdr, MANA_SET_BW_CLAMP,
1497 sizeof(resp));
1498
1499 if (err || resp.hdr.status) {
1500 netdev_err(ndev, "Failed to set bandwidth clamp: %d, 0x%x\n", err,
1501 resp.hdr.status);
1502 if (!err)
1503 err = -EOPNOTSUPP;
1504 return err;
1505 }
1506
1507 if (resp.qos_unconfigured)
1508 netdev_info(ndev, "QoS is unconfigured\n");
1509
1510 return 0;
1511 }
1512
mana_create_wq_obj(struct mana_port_context * apc,mana_handle_t vport,u32 wq_type,struct mana_obj_spec * wq_spec,struct mana_obj_spec * cq_spec,mana_handle_t * wq_obj)1513 int mana_create_wq_obj(struct mana_port_context *apc,
1514 mana_handle_t vport,
1515 u32 wq_type, struct mana_obj_spec *wq_spec,
1516 struct mana_obj_spec *cq_spec,
1517 mana_handle_t *wq_obj)
1518 {
1519 struct mana_create_wqobj_resp resp = {};
1520 struct mana_create_wqobj_req req = {};
1521 struct net_device *ndev = apc->ndev;
1522 int err;
1523
1524 mana_gd_init_req_hdr(&req.hdr, MANA_CREATE_WQ_OBJ,
1525 sizeof(req), sizeof(resp));
1526 req.vport = vport;
1527 req.wq_type = wq_type;
1528 req.wq_gdma_region = wq_spec->gdma_region;
1529 req.cq_gdma_region = cq_spec->gdma_region;
1530 req.wq_size = wq_spec->queue_size;
1531 req.cq_size = cq_spec->queue_size;
1532 req.cq_moderation_ctx_id = cq_spec->modr_ctx_id;
1533 req.cq_parent_qid = cq_spec->attached_eq;
1534
1535 err = mana_send_request(apc->ac, &req, sizeof(req), &resp,
1536 sizeof(resp));
1537 if (err) {
1538 netdev_err(ndev, "Failed to create WQ object: %d\n", err);
1539 goto out;
1540 }
1541
1542 err = mana_verify_resp_hdr(&resp.hdr, MANA_CREATE_WQ_OBJ,
1543 sizeof(resp));
1544 if (err || resp.hdr.status) {
1545 netdev_err(ndev, "Failed to create WQ object: %d, 0x%x\n", err,
1546 resp.hdr.status);
1547 if (!err)
1548 err = -EPROTO;
1549 goto out;
1550 }
1551
1552 if (resp.wq_obj == INVALID_MANA_HANDLE) {
1553 netdev_err(ndev, "Got an invalid WQ object handle\n");
1554 err = -EPROTO;
1555 goto out;
1556 }
1557
1558 *wq_obj = resp.wq_obj;
1559 wq_spec->queue_index = resp.wq_id;
1560 cq_spec->queue_index = resp.cq_id;
1561
1562 return 0;
1563 out:
1564 return err;
1565 }
1566 EXPORT_SYMBOL_NS(mana_create_wq_obj, "NET_MANA");
1567
mana_destroy_wq_obj(struct mana_port_context * apc,u32 wq_type,mana_handle_t wq_obj)1568 void mana_destroy_wq_obj(struct mana_port_context *apc, u32 wq_type,
1569 mana_handle_t wq_obj)
1570 {
1571 struct mana_destroy_wqobj_resp resp = {};
1572 struct mana_destroy_wqobj_req req = {};
1573 struct net_device *ndev = apc->ndev;
1574 int err;
1575
1576 mana_gd_init_req_hdr(&req.hdr, MANA_DESTROY_WQ_OBJ,
1577 sizeof(req), sizeof(resp));
1578 req.wq_type = wq_type;
1579 req.wq_obj_handle = wq_obj;
1580
1581 err = mana_send_request(apc->ac, &req, sizeof(req), &resp,
1582 sizeof(resp));
1583 if (err) {
1584 if (mana_en_need_log(apc, err))
1585 netdev_err(ndev, "Failed to destroy WQ object: %d\n", err);
1586
1587 return;
1588 }
1589
1590 err = mana_verify_resp_hdr(&resp.hdr, MANA_DESTROY_WQ_OBJ,
1591 sizeof(resp));
1592 if (err || resp.hdr.status)
1593 netdev_err(ndev, "Failed to destroy WQ object: %d, 0x%x\n", err,
1594 resp.hdr.status);
1595 }
1596 EXPORT_SYMBOL_NS(mana_destroy_wq_obj, "NET_MANA");
1597
mana_destroy_eq(struct mana_context * ac)1598 static void mana_destroy_eq(struct mana_context *ac)
1599 {
1600 struct gdma_context *gc = ac->gdma_dev->gdma_context;
1601 struct gdma_queue *eq;
1602 int i;
1603
1604 if (!ac->eqs)
1605 return;
1606
1607 debugfs_remove_recursive(ac->mana_eqs_debugfs);
1608 ac->mana_eqs_debugfs = NULL;
1609
1610 for (i = 0; i < gc->max_num_queues; i++) {
1611 eq = ac->eqs[i].eq;
1612 if (!eq)
1613 continue;
1614
1615 mana_gd_destroy_queue(gc, eq);
1616 }
1617
1618 kfree(ac->eqs);
1619 ac->eqs = NULL;
1620 }
1621
mana_create_eq_debugfs(struct mana_context * ac,int i)1622 static void mana_create_eq_debugfs(struct mana_context *ac, int i)
1623 {
1624 struct mana_eq eq = ac->eqs[i];
1625 char eqnum[32];
1626
1627 sprintf(eqnum, "eq%d", i);
1628 eq.mana_eq_debugfs = debugfs_create_dir(eqnum, ac->mana_eqs_debugfs);
1629 debugfs_create_u32("head", 0400, eq.mana_eq_debugfs, &eq.eq->head);
1630 debugfs_create_u32("tail", 0400, eq.mana_eq_debugfs, &eq.eq->tail);
1631 debugfs_create_file("eq_dump", 0400, eq.mana_eq_debugfs, eq.eq, &mana_dbg_q_fops);
1632 }
1633
mana_create_eq(struct mana_context * ac)1634 static int mana_create_eq(struct mana_context *ac)
1635 {
1636 struct gdma_dev *gd = ac->gdma_dev;
1637 struct gdma_context *gc = gd->gdma_context;
1638 struct gdma_queue_spec spec = {};
1639 int err;
1640 int i;
1641
1642 ac->eqs = kzalloc_objs(struct mana_eq, gc->max_num_queues);
1643 if (!ac->eqs)
1644 return -ENOMEM;
1645
1646 spec.type = GDMA_EQ;
1647 spec.monitor_avl_buf = false;
1648 spec.queue_size = EQ_SIZE;
1649 spec.eq.callback = NULL;
1650 spec.eq.context = ac->eqs;
1651 spec.eq.log2_throttle_limit = LOG2_EQ_THROTTLE;
1652
1653 ac->mana_eqs_debugfs = debugfs_create_dir("EQs", gc->mana_pci_debugfs);
1654
1655 for (i = 0; i < gc->max_num_queues; i++) {
1656 spec.eq.msix_index = (i + 1) % gc->num_msix_usable;
1657 err = mana_gd_create_mana_eq(gd, &spec, &ac->eqs[i].eq);
1658 if (err) {
1659 dev_err(gc->dev, "Failed to create EQ %d : %d\n", i, err);
1660 goto out;
1661 }
1662 mana_create_eq_debugfs(ac, i);
1663 }
1664
1665 return 0;
1666 out:
1667 mana_destroy_eq(ac);
1668 return err;
1669 }
1670
mana_fence_rq(struct mana_port_context * apc,struct mana_rxq * rxq)1671 static int mana_fence_rq(struct mana_port_context *apc, struct mana_rxq *rxq)
1672 {
1673 struct mana_fence_rq_resp resp = {};
1674 struct mana_fence_rq_req req = {};
1675 int err;
1676
1677 init_completion(&rxq->fence_event);
1678
1679 mana_gd_init_req_hdr(&req.hdr, MANA_FENCE_RQ,
1680 sizeof(req), sizeof(resp));
1681 req.wq_obj_handle = rxq->rxobj;
1682
1683 err = mana_send_request(apc->ac, &req, sizeof(req), &resp,
1684 sizeof(resp));
1685 if (err) {
1686 netdev_err(apc->ndev, "Failed to fence RQ %u: %d\n",
1687 rxq->rxq_idx, err);
1688 return err;
1689 }
1690
1691 err = mana_verify_resp_hdr(&resp.hdr, MANA_FENCE_RQ, sizeof(resp));
1692 if (err || resp.hdr.status) {
1693 netdev_err(apc->ndev, "Failed to fence RQ %u: %d, 0x%x\n",
1694 rxq->rxq_idx, err, resp.hdr.status);
1695 if (!err)
1696 err = -EPROTO;
1697
1698 return err;
1699 }
1700
1701 if (wait_for_completion_timeout(&rxq->fence_event, 10 * HZ) == 0) {
1702 netdev_err(apc->ndev, "Failed to fence RQ %u: timed out\n",
1703 rxq->rxq_idx);
1704 return -ETIMEDOUT;
1705 }
1706
1707 return 0;
1708 }
1709
mana_fence_rqs(struct mana_port_context * apc)1710 static void mana_fence_rqs(struct mana_port_context *apc)
1711 {
1712 unsigned int rxq_idx;
1713 struct mana_rxq *rxq;
1714 int err;
1715
1716 for (rxq_idx = 0; rxq_idx < apc->num_queues; rxq_idx++) {
1717 rxq = apc->rxqs[rxq_idx];
1718 err = mana_fence_rq(apc, rxq);
1719
1720 /* In case of any error, use sleep instead. */
1721 if (err)
1722 msleep(100);
1723 }
1724 }
1725
mana_move_wq_tail(struct gdma_queue * wq,u32 num_units)1726 static int mana_move_wq_tail(struct gdma_queue *wq, u32 num_units)
1727 {
1728 u32 used_space_old;
1729 u32 used_space_new;
1730
1731 used_space_old = wq->head - wq->tail;
1732 used_space_new = wq->head - (wq->tail + num_units);
1733
1734 if (WARN_ON_ONCE(used_space_new > used_space_old))
1735 return -ERANGE;
1736
1737 wq->tail += num_units;
1738 return 0;
1739 }
1740
mana_unmap_skb(struct sk_buff * skb,struct mana_port_context * apc)1741 void mana_unmap_skb(struct sk_buff *skb, struct mana_port_context *apc)
1742 {
1743 struct mana_skb_head *ash = (struct mana_skb_head *)skb->head;
1744 struct gdma_context *gc = apc->ac->gdma_dev->gdma_context;
1745 struct device *dev = gc->dev;
1746 int hsg, i;
1747
1748 /* Number of SGEs of linear part */
1749 hsg = (skb_is_gso(skb) && skb_headlen(skb) > ash->size[0]) ? 2 : 1;
1750
1751 for (i = 0; i < hsg; i++)
1752 dma_unmap_single(dev, ash->dma_handle[i], ash->size[i],
1753 DMA_TO_DEVICE);
1754
1755 for (i = hsg; i < skb_shinfo(skb)->nr_frags + hsg; i++)
1756 dma_unmap_page(dev, ash->dma_handle[i], ash->size[i],
1757 DMA_TO_DEVICE);
1758 }
1759
mana_poll_tx_cq(struct mana_cq * cq)1760 static void mana_poll_tx_cq(struct mana_cq *cq)
1761 {
1762 struct gdma_comp *completions = cq->gdma_comp_buf;
1763 struct gdma_posted_wqe_info *wqe_info;
1764 unsigned int pkt_transmitted = 0;
1765 unsigned int wqe_unit_cnt = 0;
1766 struct mana_txq *txq = cq->txq;
1767 struct mana_port_context *apc;
1768 struct netdev_queue *net_txq;
1769 struct gdma_queue *gdma_wq;
1770 unsigned int avail_space;
1771 struct net_device *ndev;
1772 struct sk_buff *skb;
1773 bool txq_stopped;
1774 int comp_read;
1775 int i;
1776
1777 ndev = txq->ndev;
1778 apc = netdev_priv(ndev);
1779
1780 /* Limit CQEs polled to 4 wraparounds of the CQ to ensure the
1781 * doorbell can be rung in time for the hardware's requirement
1782 * of at least one doorbell ring every 8 wraparounds.
1783 */
1784 comp_read = mana_gd_poll_cq(cq->gdma_cq, completions,
1785 min((cq->gdma_cq->queue_size /
1786 COMP_ENTRY_SIZE) * 4,
1787 CQE_POLLING_BUFFER));
1788
1789 if (comp_read < 1)
1790 return;
1791
1792 for (i = 0; i < comp_read; i++) {
1793 struct mana_tx_comp_oob *cqe_oob;
1794
1795 if (WARN_ON_ONCE(!completions[i].is_sq))
1796 return;
1797
1798 cqe_oob = (struct mana_tx_comp_oob *)completions[i].cqe_data;
1799 if (WARN_ON_ONCE(cqe_oob->cqe_hdr.client_type !=
1800 MANA_CQE_COMPLETION))
1801 return;
1802
1803 switch (cqe_oob->cqe_hdr.cqe_type) {
1804 case CQE_TX_OKAY:
1805 break;
1806
1807 case CQE_TX_SA_DROP:
1808 case CQE_TX_MTU_DROP:
1809 case CQE_TX_INVALID_OOB:
1810 case CQE_TX_INVALID_ETH_TYPE:
1811 case CQE_TX_HDR_PROCESSING_ERROR:
1812 case CQE_TX_VF_DISABLED:
1813 case CQE_TX_VPORT_IDX_OUT_OF_RANGE:
1814 case CQE_TX_VPORT_DISABLED:
1815 case CQE_TX_VLAN_TAGGING_VIOLATION:
1816 if (net_ratelimit())
1817 netdev_err(ndev, "TX: CQE error %d\n",
1818 cqe_oob->cqe_hdr.cqe_type);
1819
1820 apc->eth_stats.tx_cqe_err++;
1821 break;
1822
1823 default:
1824 /* If the CQE type is unknown, log an error,
1825 * and still free the SKB, update tail, etc.
1826 */
1827 if (net_ratelimit())
1828 netdev_err(ndev, "TX: unknown CQE type %d\n",
1829 cqe_oob->cqe_hdr.cqe_type);
1830
1831 apc->eth_stats.tx_cqe_unknown_type++;
1832 break;
1833 }
1834
1835 if (WARN_ON_ONCE(txq->gdma_txq_id != completions[i].wq_num))
1836 return;
1837
1838 skb = skb_dequeue(&txq->pending_skbs);
1839 if (WARN_ON_ONCE(!skb))
1840 return;
1841
1842 wqe_info = (struct gdma_posted_wqe_info *)skb->cb;
1843 wqe_unit_cnt += wqe_info->wqe_size_in_bu;
1844
1845 mana_unmap_skb(skb, apc);
1846
1847 napi_consume_skb(skb, cq->budget);
1848
1849 pkt_transmitted++;
1850 }
1851
1852 if (WARN_ON_ONCE(wqe_unit_cnt == 0))
1853 return;
1854
1855 mana_move_wq_tail(txq->gdma_sq, wqe_unit_cnt);
1856
1857 gdma_wq = txq->gdma_sq;
1858 avail_space = mana_gd_wq_avail_space(gdma_wq);
1859
1860 /* Ensure tail updated before checking q stop */
1861 smp_mb();
1862
1863 net_txq = txq->net_txq;
1864 txq_stopped = netif_tx_queue_stopped(net_txq);
1865
1866 /* Ensure checking txq_stopped before apc->port_is_up. */
1867 smp_rmb();
1868
1869 if (txq_stopped && apc->port_is_up && avail_space >= MAX_TX_WQE_SIZE) {
1870 netif_tx_wake_queue(net_txq);
1871 apc->eth_stats.wake_queue++;
1872 }
1873
1874 if (atomic_sub_return(pkt_transmitted, &txq->pending_sends) < 0)
1875 WARN_ON_ONCE(1);
1876
1877 cq->work_done = pkt_transmitted;
1878 }
1879
mana_post_pkt_rxq(struct mana_rxq * rxq)1880 static void mana_post_pkt_rxq(struct mana_rxq *rxq)
1881 {
1882 struct mana_recv_buf_oob *recv_buf_oob;
1883 u32 curr_index;
1884 int err;
1885
1886 curr_index = rxq->buf_index++;
1887 if (rxq->buf_index == rxq->num_rx_buf)
1888 rxq->buf_index = 0;
1889
1890 recv_buf_oob = &rxq->rx_oobs[curr_index];
1891
1892 err = mana_gd_post_work_request(rxq->gdma_rq, &recv_buf_oob->wqe_req,
1893 &recv_buf_oob->wqe_inf);
1894 if (WARN_ON_ONCE(err))
1895 return;
1896
1897 WARN_ON_ONCE(recv_buf_oob->wqe_inf.wqe_size_in_bu != 1);
1898 }
1899
mana_build_skb(struct mana_rxq * rxq,void * buf_va,uint pkt_len,struct xdp_buff * xdp)1900 static struct sk_buff *mana_build_skb(struct mana_rxq *rxq, void *buf_va,
1901 uint pkt_len, struct xdp_buff *xdp)
1902 {
1903 struct sk_buff *skb = napi_build_skb(buf_va, rxq->alloc_size);
1904
1905 if (!skb)
1906 return NULL;
1907
1908 if (xdp->data_hard_start) {
1909 u32 metasize = xdp->data - xdp->data_meta;
1910
1911 skb_reserve(skb, xdp->data - xdp->data_hard_start);
1912 skb_put(skb, xdp->data_end - xdp->data);
1913 if (metasize)
1914 skb_metadata_set(skb, metasize);
1915 return skb;
1916 }
1917
1918 skb_reserve(skb, rxq->headroom);
1919 skb_put(skb, pkt_len);
1920
1921 return skb;
1922 }
1923
mana_rx_skb(void * buf_va,bool from_pool,struct mana_rxcomp_oob * cqe,struct mana_rxq * rxq)1924 static void mana_rx_skb(void *buf_va, bool from_pool,
1925 struct mana_rxcomp_oob *cqe, struct mana_rxq *rxq)
1926 {
1927 struct mana_stats_rx *rx_stats = &rxq->stats;
1928 struct net_device *ndev = rxq->ndev;
1929 uint pkt_len = cqe->ppi[0].pkt_len;
1930 u16 rxq_idx = rxq->rxq_idx;
1931 struct napi_struct *napi;
1932 struct xdp_buff xdp = {};
1933 struct sk_buff *skb;
1934 u32 hash_value;
1935 u32 act;
1936
1937 rxq->rx_cq.work_done++;
1938 napi = &rxq->rx_cq.napi;
1939
1940 if (!buf_va) {
1941 ++ndev->stats.rx_dropped;
1942 return;
1943 }
1944
1945 act = mana_run_xdp(ndev, rxq, &xdp, buf_va, pkt_len);
1946
1947 if (act == XDP_REDIRECT && !rxq->xdp_rc)
1948 return;
1949
1950 if (act != XDP_PASS && act != XDP_TX)
1951 goto drop_xdp;
1952
1953 skb = mana_build_skb(rxq, buf_va, pkt_len, &xdp);
1954
1955 if (!skb)
1956 goto drop;
1957
1958 if (from_pool)
1959 skb_mark_for_recycle(skb);
1960
1961 skb->dev = napi->dev;
1962
1963 skb->protocol = eth_type_trans(skb, ndev);
1964 skb_checksum_none_assert(skb);
1965 skb_record_rx_queue(skb, rxq_idx);
1966
1967 if ((ndev->features & NETIF_F_RXCSUM) && cqe->rx_iphdr_csum_succeed) {
1968 if (cqe->rx_tcp_csum_succeed || cqe->rx_udp_csum_succeed)
1969 skb->ip_summed = CHECKSUM_UNNECESSARY;
1970 }
1971
1972 if (cqe->rx_hashtype != 0 && (ndev->features & NETIF_F_RXHASH)) {
1973 hash_value = cqe->ppi[0].pkt_hash;
1974
1975 if (cqe->rx_hashtype & MANA_HASH_L4)
1976 skb_set_hash(skb, hash_value, PKT_HASH_TYPE_L4);
1977 else
1978 skb_set_hash(skb, hash_value, PKT_HASH_TYPE_L3);
1979 }
1980
1981 if (cqe->rx_vlantag_present) {
1982 u16 vlan_tci = cqe->rx_vlan_id;
1983
1984 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vlan_tci);
1985 }
1986
1987 u64_stats_update_begin(&rx_stats->syncp);
1988 rx_stats->packets++;
1989 rx_stats->bytes += pkt_len;
1990
1991 if (act == XDP_TX)
1992 rx_stats->xdp_tx++;
1993 u64_stats_update_end(&rx_stats->syncp);
1994
1995 if (act == XDP_TX) {
1996 skb_set_queue_mapping(skb, rxq_idx);
1997 mana_xdp_tx(skb, ndev);
1998 return;
1999 }
2000
2001 napi_gro_receive(napi, skb);
2002
2003 return;
2004
2005 drop_xdp:
2006 u64_stats_update_begin(&rx_stats->syncp);
2007 rx_stats->xdp_drop++;
2008 u64_stats_update_end(&rx_stats->syncp);
2009
2010 drop:
2011 if (from_pool) {
2012 if (rxq->frag_count == 1)
2013 page_pool_recycle_direct(rxq->page_pool,
2014 virt_to_head_page(buf_va));
2015 else
2016 page_pool_free_va(rxq->page_pool, buf_va, true);
2017 } else {
2018 WARN_ON_ONCE(rxq->xdp_save_va);
2019 /* Save for reuse */
2020 rxq->xdp_save_va = buf_va;
2021 }
2022
2023 ++ndev->stats.rx_dropped;
2024
2025 return;
2026 }
2027
mana_get_rxfrag(struct mana_rxq * rxq,struct device * dev,dma_addr_t * da,bool * from_pool)2028 static void *mana_get_rxfrag(struct mana_rxq *rxq, struct device *dev,
2029 dma_addr_t *da, bool *from_pool)
2030 {
2031 struct page *page;
2032 u32 offset;
2033 void *va;
2034 *from_pool = false;
2035
2036 /* Don't use fragments for jumbo frames or XDP where it's 1 fragment
2037 * per page.
2038 */
2039 if (rxq->frag_count == 1) {
2040 /* Reuse XDP dropped page if available */
2041 if (rxq->xdp_save_va) {
2042 va = rxq->xdp_save_va;
2043 page = virt_to_head_page(va);
2044 rxq->xdp_save_va = NULL;
2045 } else {
2046 page = page_pool_dev_alloc_pages(rxq->page_pool);
2047 if (!page)
2048 return NULL;
2049
2050 *from_pool = true;
2051 va = page_to_virt(page);
2052 }
2053
2054 *da = dma_map_single(dev, va + rxq->headroom, rxq->datasize,
2055 DMA_FROM_DEVICE);
2056 if (dma_mapping_error(dev, *da)) {
2057 mana_put_rx_page(rxq, page, *from_pool);
2058 return NULL;
2059 }
2060
2061 return va;
2062 }
2063
2064 page = page_pool_dev_alloc_frag(rxq->page_pool, &offset,
2065 rxq->alloc_size);
2066 if (!page)
2067 return NULL;
2068
2069 va = page_to_virt(page) + offset;
2070 *da = page_pool_get_dma_addr(page) + offset + rxq->headroom;
2071 *from_pool = true;
2072
2073 return va;
2074 }
2075
2076 /* Allocate frag for rx buffer, and save the old buf */
mana_refill_rx_oob(struct device * dev,struct mana_rxq * rxq,struct mana_recv_buf_oob * rxoob,void ** old_buf,bool * old_fp)2077 static void mana_refill_rx_oob(struct device *dev, struct mana_rxq *rxq,
2078 struct mana_recv_buf_oob *rxoob, void **old_buf,
2079 bool *old_fp)
2080 {
2081 bool from_pool;
2082 dma_addr_t da;
2083 void *va;
2084
2085 va = mana_get_rxfrag(rxq, dev, &da, &from_pool);
2086 if (!va)
2087 return;
2088 if (!rxoob->from_pool || rxq->frag_count == 1)
2089 dma_unmap_single(dev, rxoob->sgl[0].address, rxq->datasize,
2090 DMA_FROM_DEVICE);
2091 *old_buf = rxoob->buf_va;
2092 *old_fp = rxoob->from_pool;
2093
2094 rxoob->buf_va = va;
2095 rxoob->sgl[0].address = da;
2096 rxoob->from_pool = from_pool;
2097 }
2098
mana_process_rx_cqe(struct mana_rxq * rxq,struct mana_cq * cq,struct gdma_comp * cqe)2099 static void mana_process_rx_cqe(struct mana_rxq *rxq, struct mana_cq *cq,
2100 struct gdma_comp *cqe)
2101 {
2102 struct mana_rxcomp_oob *oob = (struct mana_rxcomp_oob *)cqe->cqe_data;
2103 struct gdma_context *gc = rxq->gdma_rq->gdma_dev->gdma_context;
2104 struct net_device *ndev = rxq->ndev;
2105 struct mana_recv_buf_oob *rxbuf_oob;
2106 struct mana_port_context *apc;
2107 struct device *dev = gc->dev;
2108 void *old_buf = NULL;
2109 u32 curr, pktlen;
2110 bool old_fp;
2111
2112 apc = netdev_priv(ndev);
2113
2114 switch (oob->cqe_hdr.cqe_type) {
2115 case CQE_RX_OKAY:
2116 break;
2117
2118 case CQE_RX_TRUNCATED:
2119 ++ndev->stats.rx_dropped;
2120 rxbuf_oob = &rxq->rx_oobs[rxq->buf_index];
2121 netdev_warn_once(ndev, "Dropped a truncated packet\n");
2122 goto drop;
2123
2124 case CQE_RX_COALESCED_4:
2125 netdev_err(ndev, "RX coalescing is unsupported\n");
2126 apc->eth_stats.rx_coalesced_err++;
2127 return;
2128
2129 case CQE_RX_OBJECT_FENCE:
2130 complete(&rxq->fence_event);
2131 return;
2132
2133 default:
2134 netdev_err(ndev, "Unknown RX CQE type = %d\n",
2135 oob->cqe_hdr.cqe_type);
2136 apc->eth_stats.rx_cqe_unknown_type++;
2137 return;
2138 }
2139
2140 pktlen = oob->ppi[0].pkt_len;
2141
2142 if (pktlen == 0) {
2143 /* data packets should never have packetlength of zero */
2144 netdev_err(ndev, "RX pkt len=0, rq=%u, cq=%u, rxobj=0x%llx\n",
2145 rxq->gdma_id, cq->gdma_id, rxq->rxobj);
2146 return;
2147 }
2148
2149 curr = rxq->buf_index;
2150 rxbuf_oob = &rxq->rx_oobs[curr];
2151 WARN_ON_ONCE(rxbuf_oob->wqe_inf.wqe_size_in_bu != 1);
2152
2153 mana_refill_rx_oob(dev, rxq, rxbuf_oob, &old_buf, &old_fp);
2154
2155 /* Unsuccessful refill will have old_buf == NULL.
2156 * In this case, mana_rx_skb() will drop the packet.
2157 */
2158 mana_rx_skb(old_buf, old_fp, oob, rxq);
2159
2160 drop:
2161 mana_move_wq_tail(rxq->gdma_rq, rxbuf_oob->wqe_inf.wqe_size_in_bu);
2162
2163 mana_post_pkt_rxq(rxq);
2164 }
2165
mana_poll_rx_cq(struct mana_cq * cq)2166 static void mana_poll_rx_cq(struct mana_cq *cq)
2167 {
2168 struct gdma_comp *comp = cq->gdma_comp_buf;
2169 struct mana_rxq *rxq = cq->rxq;
2170 int comp_read, i;
2171
2172 /* Limit CQEs polled to 4 wraparounds of the CQ to ensure the
2173 * doorbell can be rung in time for the hardware's requirement
2174 * of at least one doorbell ring every 8 wraparounds.
2175 */
2176 comp_read = mana_gd_poll_cq(cq->gdma_cq, comp,
2177 min((cq->gdma_cq->queue_size /
2178 COMP_ENTRY_SIZE) * 4,
2179 CQE_POLLING_BUFFER));
2180 WARN_ON_ONCE(comp_read > CQE_POLLING_BUFFER);
2181
2182 rxq->xdp_flush = false;
2183
2184 for (i = 0; i < comp_read; i++) {
2185 if (WARN_ON_ONCE(comp[i].is_sq))
2186 return;
2187
2188 /* verify recv cqe references the right rxq */
2189 if (WARN_ON_ONCE(comp[i].wq_num != cq->rxq->gdma_id))
2190 return;
2191
2192 mana_process_rx_cqe(rxq, cq, &comp[i]);
2193 }
2194
2195 if (comp_read > 0) {
2196 struct gdma_context *gc = rxq->gdma_rq->gdma_dev->gdma_context;
2197
2198 mana_gd_wq_ring_doorbell(gc, rxq->gdma_rq);
2199 }
2200
2201 if (rxq->xdp_flush)
2202 xdp_do_flush();
2203 }
2204
mana_cq_handler(void * context,struct gdma_queue * gdma_queue)2205 static int mana_cq_handler(void *context, struct gdma_queue *gdma_queue)
2206 {
2207 struct mana_cq *cq = context;
2208 int w;
2209
2210 WARN_ON_ONCE(cq->gdma_cq != gdma_queue);
2211
2212 if (cq->type == MANA_CQ_TYPE_RX)
2213 mana_poll_rx_cq(cq);
2214 else
2215 mana_poll_tx_cq(cq);
2216
2217 w = cq->work_done;
2218 cq->work_done_since_doorbell += w;
2219
2220 if (w < cq->budget) {
2221 mana_gd_ring_cq(gdma_queue, SET_ARM_BIT);
2222 cq->work_done_since_doorbell = 0;
2223 napi_complete_done(&cq->napi, w);
2224 } else if (cq->work_done_since_doorbell >=
2225 (cq->gdma_cq->queue_size / COMP_ENTRY_SIZE) * 4) {
2226 /* MANA hardware requires at least one doorbell ring every 8
2227 * wraparounds of CQ even if there is no need to arm the CQ.
2228 * This driver rings the doorbell as soon as it has processed
2229 * 4 wraparounds.
2230 */
2231 mana_gd_ring_cq(gdma_queue, 0);
2232 cq->work_done_since_doorbell = 0;
2233 }
2234
2235 return w;
2236 }
2237
mana_poll(struct napi_struct * napi,int budget)2238 static int mana_poll(struct napi_struct *napi, int budget)
2239 {
2240 struct mana_cq *cq = container_of(napi, struct mana_cq, napi);
2241 int w;
2242
2243 cq->work_done = 0;
2244 cq->budget = budget;
2245
2246 w = mana_cq_handler(cq, cq->gdma_cq);
2247
2248 return min(w, budget);
2249 }
2250
mana_schedule_napi(void * context,struct gdma_queue * gdma_queue)2251 static void mana_schedule_napi(void *context, struct gdma_queue *gdma_queue)
2252 {
2253 struct mana_cq *cq = context;
2254
2255 napi_schedule_irqoff(&cq->napi);
2256 }
2257
mana_deinit_cq(struct mana_port_context * apc,struct mana_cq * cq)2258 static void mana_deinit_cq(struct mana_port_context *apc, struct mana_cq *cq)
2259 {
2260 struct gdma_dev *gd = apc->ac->gdma_dev;
2261
2262 if (!cq->gdma_cq)
2263 return;
2264
2265 mana_gd_destroy_queue(gd->gdma_context, cq->gdma_cq);
2266 }
2267
mana_deinit_txq(struct mana_port_context * apc,struct mana_txq * txq)2268 static void mana_deinit_txq(struct mana_port_context *apc, struct mana_txq *txq)
2269 {
2270 struct gdma_dev *gd = apc->ac->gdma_dev;
2271
2272 if (!txq->gdma_sq)
2273 return;
2274
2275 mana_gd_destroy_queue(gd->gdma_context, txq->gdma_sq);
2276 }
2277
mana_destroy_txq(struct mana_port_context * apc)2278 static void mana_destroy_txq(struct mana_port_context *apc)
2279 {
2280 struct napi_struct *napi;
2281 int i;
2282
2283 if (!apc->tx_qp)
2284 return;
2285
2286 for (i = 0; i < apc->num_queues; i++) {
2287 debugfs_remove_recursive(apc->tx_qp[i].mana_tx_debugfs);
2288 apc->tx_qp[i].mana_tx_debugfs = NULL;
2289
2290 napi = &apc->tx_qp[i].tx_cq.napi;
2291 if (apc->tx_qp[i].txq.napi_initialized) {
2292 napi_synchronize(napi);
2293 napi_disable_locked(napi);
2294 netif_napi_del_locked(napi);
2295 apc->tx_qp[i].txq.napi_initialized = false;
2296 }
2297 mana_destroy_wq_obj(apc, GDMA_SQ, apc->tx_qp[i].tx_object);
2298
2299 mana_deinit_cq(apc, &apc->tx_qp[i].tx_cq);
2300
2301 mana_deinit_txq(apc, &apc->tx_qp[i].txq);
2302 }
2303
2304 kfree(apc->tx_qp);
2305 apc->tx_qp = NULL;
2306 }
2307
mana_create_txq_debugfs(struct mana_port_context * apc,int idx)2308 static void mana_create_txq_debugfs(struct mana_port_context *apc, int idx)
2309 {
2310 struct mana_tx_qp *tx_qp = &apc->tx_qp[idx];
2311 char qnum[32];
2312
2313 sprintf(qnum, "TX-%d", idx);
2314 tx_qp->mana_tx_debugfs = debugfs_create_dir(qnum, apc->mana_port_debugfs);
2315 debugfs_create_u32("sq_head", 0400, tx_qp->mana_tx_debugfs,
2316 &tx_qp->txq.gdma_sq->head);
2317 debugfs_create_u32("sq_tail", 0400, tx_qp->mana_tx_debugfs,
2318 &tx_qp->txq.gdma_sq->tail);
2319 debugfs_create_u32("sq_pend_skb_qlen", 0400, tx_qp->mana_tx_debugfs,
2320 &tx_qp->txq.pending_skbs.qlen);
2321 debugfs_create_u32("cq_head", 0400, tx_qp->mana_tx_debugfs,
2322 &tx_qp->tx_cq.gdma_cq->head);
2323 debugfs_create_u32("cq_tail", 0400, tx_qp->mana_tx_debugfs,
2324 &tx_qp->tx_cq.gdma_cq->tail);
2325 debugfs_create_u32("cq_budget", 0400, tx_qp->mana_tx_debugfs,
2326 &tx_qp->tx_cq.budget);
2327 debugfs_create_file("txq_dump", 0400, tx_qp->mana_tx_debugfs,
2328 tx_qp->txq.gdma_sq, &mana_dbg_q_fops);
2329 debugfs_create_file("cq_dump", 0400, tx_qp->mana_tx_debugfs,
2330 tx_qp->tx_cq.gdma_cq, &mana_dbg_q_fops);
2331 }
2332
mana_create_txq(struct mana_port_context * apc,struct net_device * net)2333 static int mana_create_txq(struct mana_port_context *apc,
2334 struct net_device *net)
2335 {
2336 struct mana_context *ac = apc->ac;
2337 struct gdma_dev *gd = ac->gdma_dev;
2338 struct mana_obj_spec wq_spec;
2339 struct mana_obj_spec cq_spec;
2340 struct gdma_queue_spec spec;
2341 struct gdma_context *gc;
2342 struct mana_txq *txq;
2343 struct mana_cq *cq;
2344 u32 txq_size;
2345 u32 cq_size;
2346 int err;
2347 int i;
2348
2349 apc->tx_qp = kzalloc_objs(struct mana_tx_qp, apc->num_queues);
2350 if (!apc->tx_qp)
2351 return -ENOMEM;
2352
2353 /* The minimum size of the WQE is 32 bytes, hence
2354 * apc->tx_queue_size represents the maximum number of WQEs
2355 * the SQ can store. This value is then used to size other queues
2356 * to prevent overflow.
2357 * Also note that the txq_size is always going to be MANA_PAGE_ALIGNED,
2358 * as min val of apc->tx_queue_size is 128 and that would make
2359 * txq_size 128*32 = 4096 and the other higher values of apc->tx_queue_size
2360 * are always power of two
2361 */
2362 txq_size = apc->tx_queue_size * 32;
2363
2364 cq_size = apc->tx_queue_size * COMP_ENTRY_SIZE;
2365
2366 gc = gd->gdma_context;
2367
2368 for (i = 0; i < apc->num_queues; i++) {
2369 apc->tx_qp[i].tx_object = INVALID_MANA_HANDLE;
2370
2371 /* Create SQ */
2372 txq = &apc->tx_qp[i].txq;
2373
2374 u64_stats_init(&txq->stats.syncp);
2375 txq->ndev = net;
2376 txq->net_txq = netdev_get_tx_queue(net, i);
2377 txq->vp_offset = apc->tx_vp_offset;
2378 txq->napi_initialized = false;
2379 skb_queue_head_init(&txq->pending_skbs);
2380
2381 memset(&spec, 0, sizeof(spec));
2382 spec.type = GDMA_SQ;
2383 spec.monitor_avl_buf = true;
2384 spec.queue_size = txq_size;
2385 err = mana_gd_create_mana_wq_cq(gd, &spec, &txq->gdma_sq);
2386 if (err)
2387 goto out;
2388
2389 /* Create SQ's CQ */
2390 cq = &apc->tx_qp[i].tx_cq;
2391 cq->type = MANA_CQ_TYPE_TX;
2392
2393 cq->txq = txq;
2394
2395 memset(&spec, 0, sizeof(spec));
2396 spec.type = GDMA_CQ;
2397 spec.monitor_avl_buf = false;
2398 spec.queue_size = cq_size;
2399 spec.cq.callback = mana_schedule_napi;
2400 spec.cq.parent_eq = ac->eqs[i].eq;
2401 spec.cq.context = cq;
2402 err = mana_gd_create_mana_wq_cq(gd, &spec, &cq->gdma_cq);
2403 if (err)
2404 goto out;
2405
2406 memset(&wq_spec, 0, sizeof(wq_spec));
2407 memset(&cq_spec, 0, sizeof(cq_spec));
2408
2409 wq_spec.gdma_region = txq->gdma_sq->mem_info.dma_region_handle;
2410 wq_spec.queue_size = txq->gdma_sq->queue_size;
2411
2412 cq_spec.gdma_region = cq->gdma_cq->mem_info.dma_region_handle;
2413 cq_spec.queue_size = cq->gdma_cq->queue_size;
2414 cq_spec.modr_ctx_id = 0;
2415 cq_spec.attached_eq = cq->gdma_cq->cq.parent->id;
2416
2417 err = mana_create_wq_obj(apc, apc->port_handle, GDMA_SQ,
2418 &wq_spec, &cq_spec,
2419 &apc->tx_qp[i].tx_object);
2420
2421 if (err)
2422 goto out;
2423
2424 txq->gdma_sq->id = wq_spec.queue_index;
2425 cq->gdma_cq->id = cq_spec.queue_index;
2426
2427 txq->gdma_sq->mem_info.dma_region_handle =
2428 GDMA_INVALID_DMA_REGION;
2429 cq->gdma_cq->mem_info.dma_region_handle =
2430 GDMA_INVALID_DMA_REGION;
2431
2432 txq->gdma_txq_id = txq->gdma_sq->id;
2433
2434 cq->gdma_id = cq->gdma_cq->id;
2435
2436 if (WARN_ON(cq->gdma_id >= gc->max_num_cqs)) {
2437 err = -EINVAL;
2438 goto out;
2439 }
2440
2441 gc->cq_table[cq->gdma_id] = cq->gdma_cq;
2442
2443 mana_create_txq_debugfs(apc, i);
2444
2445 set_bit(NAPI_STATE_NO_BUSY_POLL, &cq->napi.state);
2446 netif_napi_add_locked(net, &cq->napi, mana_poll);
2447 napi_enable_locked(&cq->napi);
2448 txq->napi_initialized = true;
2449
2450 mana_gd_ring_cq(cq->gdma_cq, SET_ARM_BIT);
2451 }
2452
2453 return 0;
2454 out:
2455 netdev_err(net, "Failed to create %d TX queues, %d\n",
2456 apc->num_queues, err);
2457 mana_destroy_txq(apc);
2458 return err;
2459 }
2460
mana_destroy_rxq(struct mana_port_context * apc,struct mana_rxq * rxq,bool napi_initialized)2461 static void mana_destroy_rxq(struct mana_port_context *apc,
2462 struct mana_rxq *rxq, bool napi_initialized)
2463
2464 {
2465 struct gdma_context *gc = apc->ac->gdma_dev->gdma_context;
2466 struct mana_recv_buf_oob *rx_oob;
2467 struct device *dev = gc->dev;
2468 struct napi_struct *napi;
2469 struct page *page;
2470 int i;
2471
2472 if (!rxq)
2473 return;
2474
2475 debugfs_remove_recursive(rxq->mana_rx_debugfs);
2476 rxq->mana_rx_debugfs = NULL;
2477
2478 napi = &rxq->rx_cq.napi;
2479
2480 if (napi_initialized) {
2481 napi_synchronize(napi);
2482
2483 napi_disable_locked(napi);
2484 netif_napi_del_locked(napi);
2485 }
2486 xdp_rxq_info_unreg(&rxq->xdp_rxq);
2487
2488 mana_destroy_wq_obj(apc, GDMA_RQ, rxq->rxobj);
2489
2490 mana_deinit_cq(apc, &rxq->rx_cq);
2491
2492 if (rxq->xdp_save_va)
2493 put_page(virt_to_head_page(rxq->xdp_save_va));
2494
2495 for (i = 0; i < rxq->num_rx_buf; i++) {
2496 rx_oob = &rxq->rx_oobs[i];
2497
2498 if (!rx_oob->buf_va)
2499 continue;
2500
2501 page = virt_to_head_page(rx_oob->buf_va);
2502
2503 if (rxq->frag_count == 1 || !rx_oob->from_pool) {
2504 dma_unmap_single(dev, rx_oob->sgl[0].address,
2505 rx_oob->sgl[0].size, DMA_FROM_DEVICE);
2506 mana_put_rx_page(rxq, page, rx_oob->from_pool);
2507 } else {
2508 page_pool_free_va(rxq->page_pool, rx_oob->buf_va, true);
2509 }
2510
2511 rx_oob->buf_va = NULL;
2512 }
2513
2514 page_pool_destroy(rxq->page_pool);
2515
2516 if (rxq->gdma_rq)
2517 mana_gd_destroy_queue(gc, rxq->gdma_rq);
2518
2519 kfree(rxq);
2520 }
2521
mana_fill_rx_oob(struct mana_recv_buf_oob * rx_oob,u32 mem_key,struct mana_rxq * rxq,struct device * dev)2522 static int mana_fill_rx_oob(struct mana_recv_buf_oob *rx_oob, u32 mem_key,
2523 struct mana_rxq *rxq, struct device *dev)
2524 {
2525 struct mana_port_context *mpc = netdev_priv(rxq->ndev);
2526 bool from_pool = false;
2527 dma_addr_t da;
2528 void *va;
2529
2530 if (mpc->rxbufs_pre)
2531 va = mana_get_rxbuf_pre(rxq, &da);
2532 else
2533 va = mana_get_rxfrag(rxq, dev, &da, &from_pool);
2534
2535 if (!va)
2536 return -ENOMEM;
2537
2538 rx_oob->buf_va = va;
2539 rx_oob->from_pool = from_pool;
2540
2541 rx_oob->sgl[0].address = da;
2542 rx_oob->sgl[0].size = rxq->datasize;
2543 rx_oob->sgl[0].mem_key = mem_key;
2544
2545 return 0;
2546 }
2547
2548 #define MANA_WQE_HEADER_SIZE 16
2549 #define MANA_WQE_SGE_SIZE 16
2550
mana_alloc_rx_wqe(struct mana_port_context * apc,struct mana_rxq * rxq,u32 * rxq_size,u32 * cq_size)2551 static int mana_alloc_rx_wqe(struct mana_port_context *apc,
2552 struct mana_rxq *rxq, u32 *rxq_size, u32 *cq_size)
2553 {
2554 struct gdma_context *gc = apc->ac->gdma_dev->gdma_context;
2555 struct mana_recv_buf_oob *rx_oob;
2556 struct device *dev = gc->dev;
2557 u32 buf_idx;
2558 int ret;
2559
2560 WARN_ON(rxq->datasize == 0);
2561
2562 *rxq_size = 0;
2563 *cq_size = 0;
2564
2565 for (buf_idx = 0; buf_idx < rxq->num_rx_buf; buf_idx++) {
2566 rx_oob = &rxq->rx_oobs[buf_idx];
2567 memset(rx_oob, 0, sizeof(*rx_oob));
2568
2569 rx_oob->num_sge = 1;
2570
2571 ret = mana_fill_rx_oob(rx_oob, apc->ac->gdma_dev->gpa_mkey, rxq,
2572 dev);
2573 if (ret)
2574 return ret;
2575
2576 rx_oob->wqe_req.sgl = rx_oob->sgl;
2577 rx_oob->wqe_req.num_sge = rx_oob->num_sge;
2578 rx_oob->wqe_req.inline_oob_size = 0;
2579 rx_oob->wqe_req.inline_oob_data = NULL;
2580 rx_oob->wqe_req.flags = 0;
2581 rx_oob->wqe_req.client_data_unit = 0;
2582
2583 *rxq_size += ALIGN(MANA_WQE_HEADER_SIZE +
2584 MANA_WQE_SGE_SIZE * rx_oob->num_sge, 32);
2585 *cq_size += COMP_ENTRY_SIZE;
2586 }
2587
2588 return 0;
2589 }
2590
mana_push_wqe(struct mana_rxq * rxq)2591 static int mana_push_wqe(struct mana_rxq *rxq)
2592 {
2593 struct mana_recv_buf_oob *rx_oob;
2594 u32 buf_idx;
2595 int err;
2596
2597 for (buf_idx = 0; buf_idx < rxq->num_rx_buf; buf_idx++) {
2598 rx_oob = &rxq->rx_oobs[buf_idx];
2599
2600 err = mana_gd_post_and_ring(rxq->gdma_rq, &rx_oob->wqe_req,
2601 &rx_oob->wqe_inf);
2602 if (err)
2603 return -ENOSPC;
2604 }
2605
2606 return 0;
2607 }
2608
mana_create_page_pool(struct mana_rxq * rxq,struct gdma_context * gc)2609 static int mana_create_page_pool(struct mana_rxq *rxq, struct gdma_context *gc)
2610 {
2611 struct mana_port_context *mpc = netdev_priv(rxq->ndev);
2612 struct page_pool_params pprm = {};
2613 int ret;
2614
2615 pprm.pool_size = mpc->rx_queue_size / rxq->frag_count + 1;
2616 pprm.nid = gc->numa_node;
2617 pprm.napi = &rxq->rx_cq.napi;
2618 pprm.netdev = rxq->ndev;
2619 pprm.order = get_order(rxq->alloc_size);
2620 pprm.queue_idx = rxq->rxq_idx;
2621 pprm.dev = gc->dev;
2622
2623 /* Let the page pool do the dma map when page sharing with multiple
2624 * fragments enabled for rx buffers.
2625 */
2626 if (rxq->frag_count > 1) {
2627 pprm.flags = PP_FLAG_DMA_MAP | PP_FLAG_DMA_SYNC_DEV;
2628 pprm.max_len = PAGE_SIZE;
2629 pprm.dma_dir = DMA_FROM_DEVICE;
2630 }
2631
2632 rxq->page_pool = page_pool_create(&pprm);
2633
2634 if (IS_ERR(rxq->page_pool)) {
2635 ret = PTR_ERR(rxq->page_pool);
2636 rxq->page_pool = NULL;
2637 return ret;
2638 }
2639
2640 return 0;
2641 }
2642
mana_create_rxq(struct mana_port_context * apc,u32 rxq_idx,struct mana_eq * eq,struct net_device * ndev)2643 static struct mana_rxq *mana_create_rxq(struct mana_port_context *apc,
2644 u32 rxq_idx, struct mana_eq *eq,
2645 struct net_device *ndev)
2646 {
2647 struct gdma_dev *gd = apc->ac->gdma_dev;
2648 struct mana_obj_spec wq_spec;
2649 struct mana_obj_spec cq_spec;
2650 struct gdma_queue_spec spec;
2651 struct mana_cq *cq = NULL;
2652 struct gdma_context *gc;
2653 u32 cq_size, rq_size;
2654 struct mana_rxq *rxq;
2655 int err;
2656
2657 gc = gd->gdma_context;
2658
2659 rxq = kzalloc_flex(*rxq, rx_oobs, apc->rx_queue_size);
2660 if (!rxq)
2661 return NULL;
2662
2663 rxq->ndev = ndev;
2664 rxq->num_rx_buf = apc->rx_queue_size;
2665 rxq->rxq_idx = rxq_idx;
2666 rxq->rxobj = INVALID_MANA_HANDLE;
2667
2668 mana_get_rxbuf_cfg(apc, ndev->mtu, &rxq->datasize, &rxq->alloc_size,
2669 &rxq->headroom, &rxq->frag_count);
2670 /* Create page pool for RX queue */
2671 err = mana_create_page_pool(rxq, gc);
2672 if (err) {
2673 netdev_err(ndev, "Create page pool err:%d\n", err);
2674 goto out;
2675 }
2676
2677 err = mana_alloc_rx_wqe(apc, rxq, &rq_size, &cq_size);
2678 if (err)
2679 goto out;
2680
2681 rq_size = MANA_PAGE_ALIGN(rq_size);
2682 cq_size = MANA_PAGE_ALIGN(cq_size);
2683
2684 /* Create RQ */
2685 memset(&spec, 0, sizeof(spec));
2686 spec.type = GDMA_RQ;
2687 spec.monitor_avl_buf = true;
2688 spec.queue_size = rq_size;
2689 err = mana_gd_create_mana_wq_cq(gd, &spec, &rxq->gdma_rq);
2690 if (err)
2691 goto out;
2692
2693 /* Create RQ's CQ */
2694 cq = &rxq->rx_cq;
2695 cq->type = MANA_CQ_TYPE_RX;
2696 cq->rxq = rxq;
2697
2698 memset(&spec, 0, sizeof(spec));
2699 spec.type = GDMA_CQ;
2700 spec.monitor_avl_buf = false;
2701 spec.queue_size = cq_size;
2702 spec.cq.callback = mana_schedule_napi;
2703 spec.cq.parent_eq = eq->eq;
2704 spec.cq.context = cq;
2705 err = mana_gd_create_mana_wq_cq(gd, &spec, &cq->gdma_cq);
2706 if (err)
2707 goto out;
2708
2709 memset(&wq_spec, 0, sizeof(wq_spec));
2710 memset(&cq_spec, 0, sizeof(cq_spec));
2711 wq_spec.gdma_region = rxq->gdma_rq->mem_info.dma_region_handle;
2712 wq_spec.queue_size = rxq->gdma_rq->queue_size;
2713
2714 cq_spec.gdma_region = cq->gdma_cq->mem_info.dma_region_handle;
2715 cq_spec.queue_size = cq->gdma_cq->queue_size;
2716 cq_spec.modr_ctx_id = 0;
2717 cq_spec.attached_eq = cq->gdma_cq->cq.parent->id;
2718
2719 err = mana_create_wq_obj(apc, apc->port_handle, GDMA_RQ,
2720 &wq_spec, &cq_spec, &rxq->rxobj);
2721 if (err)
2722 goto out;
2723
2724 rxq->gdma_rq->id = wq_spec.queue_index;
2725 cq->gdma_cq->id = cq_spec.queue_index;
2726
2727 rxq->gdma_rq->mem_info.dma_region_handle = GDMA_INVALID_DMA_REGION;
2728 cq->gdma_cq->mem_info.dma_region_handle = GDMA_INVALID_DMA_REGION;
2729
2730 rxq->gdma_id = rxq->gdma_rq->id;
2731 cq->gdma_id = cq->gdma_cq->id;
2732
2733 err = mana_push_wqe(rxq);
2734 if (err)
2735 goto out;
2736
2737 if (WARN_ON(cq->gdma_id >= gc->max_num_cqs)) {
2738 err = -EINVAL;
2739 goto out;
2740 }
2741
2742 gc->cq_table[cq->gdma_id] = cq->gdma_cq;
2743
2744 netif_napi_add_weight_locked(ndev, &cq->napi, mana_poll, 1);
2745
2746 WARN_ON(xdp_rxq_info_reg(&rxq->xdp_rxq, ndev, rxq_idx,
2747 cq->napi.napi_id));
2748 WARN_ON(xdp_rxq_info_reg_mem_model(&rxq->xdp_rxq, MEM_TYPE_PAGE_POOL,
2749 rxq->page_pool));
2750
2751 napi_enable_locked(&cq->napi);
2752
2753 mana_gd_ring_cq(cq->gdma_cq, SET_ARM_BIT);
2754 out:
2755 if (!err)
2756 return rxq;
2757
2758 netdev_err(ndev, "Failed to create RXQ: err = %d\n", err);
2759
2760 mana_destroy_rxq(apc, rxq, false);
2761
2762 if (cq)
2763 mana_deinit_cq(apc, cq);
2764
2765 return NULL;
2766 }
2767
mana_create_rxq_debugfs(struct mana_port_context * apc,int idx)2768 static void mana_create_rxq_debugfs(struct mana_port_context *apc, int idx)
2769 {
2770 struct mana_rxq *rxq;
2771 char qnum[32];
2772
2773 rxq = apc->rxqs[idx];
2774
2775 sprintf(qnum, "RX-%d", idx);
2776 rxq->mana_rx_debugfs = debugfs_create_dir(qnum, apc->mana_port_debugfs);
2777 debugfs_create_u32("rq_head", 0400, rxq->mana_rx_debugfs, &rxq->gdma_rq->head);
2778 debugfs_create_u32("rq_tail", 0400, rxq->mana_rx_debugfs, &rxq->gdma_rq->tail);
2779 debugfs_create_u32("rq_nbuf", 0400, rxq->mana_rx_debugfs, &rxq->num_rx_buf);
2780 debugfs_create_u32("cq_head", 0400, rxq->mana_rx_debugfs,
2781 &rxq->rx_cq.gdma_cq->head);
2782 debugfs_create_u32("cq_tail", 0400, rxq->mana_rx_debugfs,
2783 &rxq->rx_cq.gdma_cq->tail);
2784 debugfs_create_u32("cq_budget", 0400, rxq->mana_rx_debugfs, &rxq->rx_cq.budget);
2785 debugfs_create_file("rxq_dump", 0400, rxq->mana_rx_debugfs, rxq->gdma_rq, &mana_dbg_q_fops);
2786 debugfs_create_file("cq_dump", 0400, rxq->mana_rx_debugfs, rxq->rx_cq.gdma_cq,
2787 &mana_dbg_q_fops);
2788 }
2789
mana_add_rx_queues(struct mana_port_context * apc,struct net_device * ndev)2790 static int mana_add_rx_queues(struct mana_port_context *apc,
2791 struct net_device *ndev)
2792 {
2793 struct mana_context *ac = apc->ac;
2794 struct mana_rxq *rxq;
2795 int err = 0;
2796 int i;
2797
2798 for (i = 0; i < apc->num_queues; i++) {
2799 rxq = mana_create_rxq(apc, i, &ac->eqs[i], ndev);
2800 if (!rxq) {
2801 err = -ENOMEM;
2802 netdev_err(ndev, "Failed to create rxq %d : %d\n", i, err);
2803 goto out;
2804 }
2805
2806 u64_stats_init(&rxq->stats.syncp);
2807
2808 apc->rxqs[i] = rxq;
2809
2810 mana_create_rxq_debugfs(apc, i);
2811 }
2812
2813 apc->default_rxobj = apc->rxqs[0]->rxobj;
2814 out:
2815 return err;
2816 }
2817
mana_destroy_vport(struct mana_port_context * apc)2818 static void mana_destroy_vport(struct mana_port_context *apc)
2819 {
2820 struct gdma_dev *gd = apc->ac->gdma_dev;
2821 struct mana_rxq *rxq;
2822 u32 rxq_idx;
2823
2824 for (rxq_idx = 0; rxq_idx < apc->num_queues; rxq_idx++) {
2825 rxq = apc->rxqs[rxq_idx];
2826 if (!rxq)
2827 continue;
2828
2829 mana_destroy_rxq(apc, rxq, true);
2830 apc->rxqs[rxq_idx] = NULL;
2831 }
2832
2833 mana_destroy_txq(apc);
2834 mana_uncfg_vport(apc);
2835
2836 if (gd->gdma_context->is_pf && !apc->ac->bm_hostmode)
2837 mana_pf_deregister_hw_vport(apc);
2838 }
2839
mana_create_vport(struct mana_port_context * apc,struct net_device * net)2840 static int mana_create_vport(struct mana_port_context *apc,
2841 struct net_device *net)
2842 {
2843 struct gdma_dev *gd = apc->ac->gdma_dev;
2844 int err;
2845
2846 apc->default_rxobj = INVALID_MANA_HANDLE;
2847
2848 if (gd->gdma_context->is_pf && !apc->ac->bm_hostmode) {
2849 err = mana_pf_register_hw_vport(apc);
2850 if (err)
2851 return err;
2852 }
2853
2854 err = mana_cfg_vport(apc, gd->pdid, gd->doorbell);
2855 if (err)
2856 return err;
2857
2858 return mana_create_txq(apc, net);
2859 }
2860
mana_rss_table_alloc(struct mana_port_context * apc)2861 static int mana_rss_table_alloc(struct mana_port_context *apc)
2862 {
2863 if (!apc->indir_table_sz) {
2864 netdev_err(apc->ndev,
2865 "Indirection table size not set for vPort %d\n",
2866 apc->port_idx);
2867 return -EINVAL;
2868 }
2869
2870 apc->indir_table = kcalloc(apc->indir_table_sz, sizeof(u32), GFP_KERNEL);
2871 if (!apc->indir_table)
2872 return -ENOMEM;
2873
2874 apc->rxobj_table = kzalloc_objs(mana_handle_t, apc->indir_table_sz);
2875 if (!apc->rxobj_table) {
2876 kfree(apc->indir_table);
2877 return -ENOMEM;
2878 }
2879
2880 return 0;
2881 }
2882
mana_rss_table_init(struct mana_port_context * apc)2883 static void mana_rss_table_init(struct mana_port_context *apc)
2884 {
2885 int i;
2886
2887 for (i = 0; i < apc->indir_table_sz; i++)
2888 apc->indir_table[i] =
2889 ethtool_rxfh_indir_default(i, apc->num_queues);
2890 }
2891
mana_config_rss(struct mana_port_context * apc,enum TRI_STATE rx,bool update_hash,bool update_tab)2892 int mana_config_rss(struct mana_port_context *apc, enum TRI_STATE rx,
2893 bool update_hash, bool update_tab)
2894 {
2895 u32 queue_idx;
2896 int err;
2897 int i;
2898
2899 if (update_tab) {
2900 for (i = 0; i < apc->indir_table_sz; i++) {
2901 queue_idx = apc->indir_table[i];
2902 apc->rxobj_table[i] = apc->rxqs[queue_idx]->rxobj;
2903 }
2904 }
2905
2906 err = mana_cfg_vport_steering(apc, rx, true, update_hash, update_tab);
2907 if (err)
2908 return err;
2909
2910 mana_fence_rqs(apc);
2911
2912 return 0;
2913 }
2914
mana_query_gf_stats(struct mana_context * ac)2915 int mana_query_gf_stats(struct mana_context *ac)
2916 {
2917 struct gdma_context *gc = ac->gdma_dev->gdma_context;
2918 struct mana_query_gf_stat_resp resp = {};
2919 struct mana_query_gf_stat_req req = {};
2920 struct device *dev = gc->dev;
2921 int err;
2922
2923 mana_gd_init_req_hdr(&req.hdr, MANA_QUERY_GF_STAT,
2924 sizeof(req), sizeof(resp));
2925 req.hdr.resp.msg_version = GDMA_MESSAGE_V2;
2926 req.req_stats = STATISTICS_FLAGS_RX_DISCARDS_NO_WQE |
2927 STATISTICS_FLAGS_RX_ERRORS_VPORT_DISABLED |
2928 STATISTICS_FLAGS_HC_RX_BYTES |
2929 STATISTICS_FLAGS_HC_RX_UCAST_PACKETS |
2930 STATISTICS_FLAGS_HC_RX_UCAST_BYTES |
2931 STATISTICS_FLAGS_HC_RX_MCAST_PACKETS |
2932 STATISTICS_FLAGS_HC_RX_MCAST_BYTES |
2933 STATISTICS_FLAGS_HC_RX_BCAST_PACKETS |
2934 STATISTICS_FLAGS_HC_RX_BCAST_BYTES |
2935 STATISTICS_FLAGS_TX_ERRORS_GF_DISABLED |
2936 STATISTICS_FLAGS_TX_ERRORS_VPORT_DISABLED |
2937 STATISTICS_FLAGS_TX_ERRORS_INVAL_VPORT_OFFSET_PACKETS |
2938 STATISTICS_FLAGS_TX_ERRORS_VLAN_ENFORCEMENT |
2939 STATISTICS_FLAGS_TX_ERRORS_ETH_TYPE_ENFORCEMENT |
2940 STATISTICS_FLAGS_TX_ERRORS_SA_ENFORCEMENT |
2941 STATISTICS_FLAGS_TX_ERRORS_SQPDID_ENFORCEMENT |
2942 STATISTICS_FLAGS_TX_ERRORS_CQPDID_ENFORCEMENT |
2943 STATISTICS_FLAGS_TX_ERRORS_MTU_VIOLATION |
2944 STATISTICS_FLAGS_TX_ERRORS_INVALID_OOB |
2945 STATISTICS_FLAGS_HC_TX_BYTES |
2946 STATISTICS_FLAGS_HC_TX_UCAST_PACKETS |
2947 STATISTICS_FLAGS_HC_TX_UCAST_BYTES |
2948 STATISTICS_FLAGS_HC_TX_MCAST_PACKETS |
2949 STATISTICS_FLAGS_HC_TX_MCAST_BYTES |
2950 STATISTICS_FLAGS_HC_TX_BCAST_PACKETS |
2951 STATISTICS_FLAGS_HC_TX_BCAST_BYTES |
2952 STATISTICS_FLAGS_TX_ERRORS_GDMA_ERROR;
2953
2954 err = mana_send_request(ac, &req, sizeof(req), &resp,
2955 sizeof(resp));
2956 if (err) {
2957 dev_err(dev, "Failed to query GF stats: %d\n", err);
2958 return err;
2959 }
2960 err = mana_verify_resp_hdr(&resp.hdr, MANA_QUERY_GF_STAT,
2961 sizeof(resp));
2962 if (err || resp.hdr.status) {
2963 dev_err(dev, "Failed to query GF stats: %d, 0x%x\n", err,
2964 resp.hdr.status);
2965 return err;
2966 }
2967
2968 ac->hc_stats.hc_rx_discards_no_wqe = resp.rx_discards_nowqe;
2969 ac->hc_stats.hc_rx_err_vport_disabled = resp.rx_err_vport_disabled;
2970 ac->hc_stats.hc_rx_bytes = resp.hc_rx_bytes;
2971 ac->hc_stats.hc_rx_ucast_pkts = resp.hc_rx_ucast_pkts;
2972 ac->hc_stats.hc_rx_ucast_bytes = resp.hc_rx_ucast_bytes;
2973 ac->hc_stats.hc_rx_bcast_pkts = resp.hc_rx_bcast_pkts;
2974 ac->hc_stats.hc_rx_bcast_bytes = resp.hc_rx_bcast_bytes;
2975 ac->hc_stats.hc_rx_mcast_pkts = resp.hc_rx_mcast_pkts;
2976 ac->hc_stats.hc_rx_mcast_bytes = resp.hc_rx_mcast_bytes;
2977 ac->hc_stats.hc_tx_err_gf_disabled = resp.tx_err_gf_disabled;
2978 ac->hc_stats.hc_tx_err_vport_disabled = resp.tx_err_vport_disabled;
2979 ac->hc_stats.hc_tx_err_inval_vportoffset_pkt =
2980 resp.tx_err_inval_vport_offset_pkt;
2981 ac->hc_stats.hc_tx_err_vlan_enforcement =
2982 resp.tx_err_vlan_enforcement;
2983 ac->hc_stats.hc_tx_err_eth_type_enforcement =
2984 resp.tx_err_ethtype_enforcement;
2985 ac->hc_stats.hc_tx_err_sa_enforcement = resp.tx_err_SA_enforcement;
2986 ac->hc_stats.hc_tx_err_sqpdid_enforcement =
2987 resp.tx_err_SQPDID_enforcement;
2988 ac->hc_stats.hc_tx_err_cqpdid_enforcement =
2989 resp.tx_err_CQPDID_enforcement;
2990 ac->hc_stats.hc_tx_err_mtu_violation = resp.tx_err_mtu_violation;
2991 ac->hc_stats.hc_tx_err_inval_oob = resp.tx_err_inval_oob;
2992 ac->hc_stats.hc_tx_bytes = resp.hc_tx_bytes;
2993 ac->hc_stats.hc_tx_ucast_pkts = resp.hc_tx_ucast_pkts;
2994 ac->hc_stats.hc_tx_ucast_bytes = resp.hc_tx_ucast_bytes;
2995 ac->hc_stats.hc_tx_bcast_pkts = resp.hc_tx_bcast_pkts;
2996 ac->hc_stats.hc_tx_bcast_bytes = resp.hc_tx_bcast_bytes;
2997 ac->hc_stats.hc_tx_mcast_pkts = resp.hc_tx_mcast_pkts;
2998 ac->hc_stats.hc_tx_mcast_bytes = resp.hc_tx_mcast_bytes;
2999 ac->hc_stats.hc_tx_err_gdma = resp.tx_err_gdma;
3000
3001 return 0;
3002 }
3003
mana_query_phy_stats(struct mana_port_context * apc)3004 void mana_query_phy_stats(struct mana_port_context *apc)
3005 {
3006 struct mana_query_phy_stat_resp resp = {};
3007 struct mana_query_phy_stat_req req = {};
3008 struct net_device *ndev = apc->ndev;
3009 int err;
3010
3011 mana_gd_init_req_hdr(&req.hdr, MANA_QUERY_PHY_STAT,
3012 sizeof(req), sizeof(resp));
3013 err = mana_send_request(apc->ac, &req, sizeof(req), &resp,
3014 sizeof(resp));
3015 if (err)
3016 return;
3017
3018 err = mana_verify_resp_hdr(&resp.hdr, MANA_QUERY_PHY_STAT,
3019 sizeof(resp));
3020 if (err || resp.hdr.status) {
3021 netdev_err(ndev,
3022 "Failed to query PHY stats: %d, resp:0x%x\n",
3023 err, resp.hdr.status);
3024 return;
3025 }
3026
3027 /* Aggregate drop counters */
3028 apc->phy_stats.rx_pkt_drop_phy = resp.rx_pkt_drop_phy;
3029 apc->phy_stats.tx_pkt_drop_phy = resp.tx_pkt_drop_phy;
3030
3031 /* Per TC traffic Counters */
3032 apc->phy_stats.rx_pkt_tc0_phy = resp.rx_pkt_tc0_phy;
3033 apc->phy_stats.tx_pkt_tc0_phy = resp.tx_pkt_tc0_phy;
3034 apc->phy_stats.rx_pkt_tc1_phy = resp.rx_pkt_tc1_phy;
3035 apc->phy_stats.tx_pkt_tc1_phy = resp.tx_pkt_tc1_phy;
3036 apc->phy_stats.rx_pkt_tc2_phy = resp.rx_pkt_tc2_phy;
3037 apc->phy_stats.tx_pkt_tc2_phy = resp.tx_pkt_tc2_phy;
3038 apc->phy_stats.rx_pkt_tc3_phy = resp.rx_pkt_tc3_phy;
3039 apc->phy_stats.tx_pkt_tc3_phy = resp.tx_pkt_tc3_phy;
3040 apc->phy_stats.rx_pkt_tc4_phy = resp.rx_pkt_tc4_phy;
3041 apc->phy_stats.tx_pkt_tc4_phy = resp.tx_pkt_tc4_phy;
3042 apc->phy_stats.rx_pkt_tc5_phy = resp.rx_pkt_tc5_phy;
3043 apc->phy_stats.tx_pkt_tc5_phy = resp.tx_pkt_tc5_phy;
3044 apc->phy_stats.rx_pkt_tc6_phy = resp.rx_pkt_tc6_phy;
3045 apc->phy_stats.tx_pkt_tc6_phy = resp.tx_pkt_tc6_phy;
3046 apc->phy_stats.rx_pkt_tc7_phy = resp.rx_pkt_tc7_phy;
3047 apc->phy_stats.tx_pkt_tc7_phy = resp.tx_pkt_tc7_phy;
3048
3049 /* Per TC byte Counters */
3050 apc->phy_stats.rx_byte_tc0_phy = resp.rx_byte_tc0_phy;
3051 apc->phy_stats.tx_byte_tc0_phy = resp.tx_byte_tc0_phy;
3052 apc->phy_stats.rx_byte_tc1_phy = resp.rx_byte_tc1_phy;
3053 apc->phy_stats.tx_byte_tc1_phy = resp.tx_byte_tc1_phy;
3054 apc->phy_stats.rx_byte_tc2_phy = resp.rx_byte_tc2_phy;
3055 apc->phy_stats.tx_byte_tc2_phy = resp.tx_byte_tc2_phy;
3056 apc->phy_stats.rx_byte_tc3_phy = resp.rx_byte_tc3_phy;
3057 apc->phy_stats.tx_byte_tc3_phy = resp.tx_byte_tc3_phy;
3058 apc->phy_stats.rx_byte_tc4_phy = resp.rx_byte_tc4_phy;
3059 apc->phy_stats.tx_byte_tc4_phy = resp.tx_byte_tc4_phy;
3060 apc->phy_stats.rx_byte_tc5_phy = resp.rx_byte_tc5_phy;
3061 apc->phy_stats.tx_byte_tc5_phy = resp.tx_byte_tc5_phy;
3062 apc->phy_stats.rx_byte_tc6_phy = resp.rx_byte_tc6_phy;
3063 apc->phy_stats.tx_byte_tc6_phy = resp.tx_byte_tc6_phy;
3064 apc->phy_stats.rx_byte_tc7_phy = resp.rx_byte_tc7_phy;
3065 apc->phy_stats.tx_byte_tc7_phy = resp.tx_byte_tc7_phy;
3066
3067 /* Per TC pause Counters */
3068 apc->phy_stats.rx_pause_tc0_phy = resp.rx_pause_tc0_phy;
3069 apc->phy_stats.tx_pause_tc0_phy = resp.tx_pause_tc0_phy;
3070 apc->phy_stats.rx_pause_tc1_phy = resp.rx_pause_tc1_phy;
3071 apc->phy_stats.tx_pause_tc1_phy = resp.tx_pause_tc1_phy;
3072 apc->phy_stats.rx_pause_tc2_phy = resp.rx_pause_tc2_phy;
3073 apc->phy_stats.tx_pause_tc2_phy = resp.tx_pause_tc2_phy;
3074 apc->phy_stats.rx_pause_tc3_phy = resp.rx_pause_tc3_phy;
3075 apc->phy_stats.tx_pause_tc3_phy = resp.tx_pause_tc3_phy;
3076 apc->phy_stats.rx_pause_tc4_phy = resp.rx_pause_tc4_phy;
3077 apc->phy_stats.tx_pause_tc4_phy = resp.tx_pause_tc4_phy;
3078 apc->phy_stats.rx_pause_tc5_phy = resp.rx_pause_tc5_phy;
3079 apc->phy_stats.tx_pause_tc5_phy = resp.tx_pause_tc5_phy;
3080 apc->phy_stats.rx_pause_tc6_phy = resp.rx_pause_tc6_phy;
3081 apc->phy_stats.tx_pause_tc6_phy = resp.tx_pause_tc6_phy;
3082 apc->phy_stats.rx_pause_tc7_phy = resp.rx_pause_tc7_phy;
3083 apc->phy_stats.tx_pause_tc7_phy = resp.tx_pause_tc7_phy;
3084 }
3085
mana_init_port(struct net_device * ndev)3086 static int mana_init_port(struct net_device *ndev)
3087 {
3088 struct mana_port_context *apc = netdev_priv(ndev);
3089 struct gdma_dev *gd = apc->ac->gdma_dev;
3090 u32 max_txq, max_rxq, max_queues;
3091 int port_idx = apc->port_idx;
3092 struct gdma_context *gc;
3093 char vport[32];
3094 int err;
3095
3096 err = mana_init_port_context(apc);
3097 if (err)
3098 return err;
3099
3100 gc = gd->gdma_context;
3101
3102 err = mana_query_vport_cfg(apc, port_idx, &max_txq, &max_rxq,
3103 &apc->indir_table_sz);
3104 if (err) {
3105 netdev_err(ndev, "Failed to query info for vPort %d\n",
3106 port_idx);
3107 goto reset_apc;
3108 }
3109
3110 max_queues = min_t(u32, max_txq, max_rxq);
3111 if (apc->max_queues > max_queues)
3112 apc->max_queues = max_queues;
3113
3114 if (apc->num_queues > apc->max_queues)
3115 apc->num_queues = apc->max_queues;
3116
3117 eth_hw_addr_set(ndev, apc->mac_addr);
3118 sprintf(vport, "vport%d", port_idx);
3119 apc->mana_port_debugfs = debugfs_create_dir(vport, gc->mana_pci_debugfs);
3120 return 0;
3121
3122 reset_apc:
3123 mana_cleanup_port_context(apc);
3124 return err;
3125 }
3126
mana_alloc_queues(struct net_device * ndev)3127 int mana_alloc_queues(struct net_device *ndev)
3128 {
3129 struct mana_port_context *apc = netdev_priv(ndev);
3130 struct gdma_dev *gd = apc->ac->gdma_dev;
3131 int err;
3132
3133 err = mana_create_vport(apc, ndev);
3134 if (err) {
3135 netdev_err(ndev, "Failed to create vPort %u : %d\n", apc->port_idx, err);
3136 return err;
3137 }
3138
3139 err = netif_set_real_num_tx_queues(ndev, apc->num_queues);
3140 if (err) {
3141 netdev_err(ndev,
3142 "netif_set_real_num_tx_queues () failed for ndev with num_queues %u : %d\n",
3143 apc->num_queues, err);
3144 goto destroy_vport;
3145 }
3146
3147 err = mana_add_rx_queues(apc, ndev);
3148 if (err)
3149 goto destroy_vport;
3150
3151 apc->rss_state = apc->num_queues > 1 ? TRI_STATE_TRUE : TRI_STATE_FALSE;
3152
3153 err = netif_set_real_num_rx_queues(ndev, apc->num_queues);
3154 if (err) {
3155 netdev_err(ndev,
3156 "netif_set_real_num_rx_queues () failed for ndev with num_queues %u : %d\n",
3157 apc->num_queues, err);
3158 goto destroy_vport;
3159 }
3160
3161 mana_rss_table_init(apc);
3162
3163 err = mana_config_rss(apc, TRI_STATE_TRUE, true, true);
3164 if (err) {
3165 netdev_err(ndev, "Failed to configure RSS table: %d\n", err);
3166 goto destroy_vport;
3167 }
3168
3169 if (gd->gdma_context->is_pf && !apc->ac->bm_hostmode) {
3170 err = mana_pf_register_filter(apc);
3171 if (err)
3172 goto destroy_vport;
3173 }
3174
3175 mana_chn_setxdp(apc, mana_xdp_get(apc));
3176
3177 return 0;
3178
3179 destroy_vport:
3180 mana_destroy_vport(apc);
3181 return err;
3182 }
3183
mana_attach(struct net_device * ndev)3184 int mana_attach(struct net_device *ndev)
3185 {
3186 struct mana_port_context *apc = netdev_priv(ndev);
3187 int err;
3188
3189 ASSERT_RTNL();
3190
3191 err = mana_init_port(ndev);
3192 if (err)
3193 return err;
3194
3195 if (apc->port_st_save) {
3196 err = mana_alloc_queues(ndev);
3197 if (err) {
3198 mana_cleanup_port_context(apc);
3199 return err;
3200 }
3201 }
3202
3203 apc->port_is_up = apc->port_st_save;
3204
3205 /* Ensure port state updated before txq state */
3206 smp_wmb();
3207
3208 netif_device_attach(ndev);
3209
3210 return 0;
3211 }
3212
mana_dealloc_queues(struct net_device * ndev)3213 static int mana_dealloc_queues(struct net_device *ndev)
3214 {
3215 struct mana_port_context *apc = netdev_priv(ndev);
3216 unsigned long timeout = jiffies + 120 * HZ;
3217 struct gdma_dev *gd = apc->ac->gdma_dev;
3218 struct mana_txq *txq;
3219 struct sk_buff *skb;
3220 int i, err;
3221 u32 tsleep;
3222
3223 if (apc->port_is_up)
3224 return -EINVAL;
3225
3226 mana_chn_setxdp(apc, NULL);
3227
3228 if (gd->gdma_context->is_pf && !apc->ac->bm_hostmode)
3229 mana_pf_deregister_filter(apc);
3230
3231 /* No packet can be transmitted now since apc->port_is_up is false.
3232 * There is still a tiny chance that mana_poll_tx_cq() can re-enable
3233 * a txq because it may not timely see apc->port_is_up being cleared
3234 * to false, but it doesn't matter since mana_start_xmit() drops any
3235 * new packets due to apc->port_is_up being false.
3236 *
3237 * Drain all the in-flight TX packets.
3238 * A timeout of 120 seconds for all the queues is used.
3239 * This will break the while loop when h/w is not responding.
3240 * This value of 120 has been decided here considering max
3241 * number of queues.
3242 */
3243
3244 for (i = 0; i < apc->num_queues; i++) {
3245 txq = &apc->tx_qp[i].txq;
3246 tsleep = 1000;
3247 while (atomic_read(&txq->pending_sends) > 0 &&
3248 time_before(jiffies, timeout)) {
3249 usleep_range(tsleep, tsleep + 1000);
3250 tsleep <<= 1;
3251 }
3252 if (atomic_read(&txq->pending_sends)) {
3253 err = pcie_flr(to_pci_dev(gd->gdma_context->dev));
3254 if (err) {
3255 netdev_err(ndev, "flr failed %d with %d pkts pending in txq %u\n",
3256 err, atomic_read(&txq->pending_sends),
3257 txq->gdma_txq_id);
3258 }
3259 break;
3260 }
3261 }
3262
3263 for (i = 0; i < apc->num_queues; i++) {
3264 txq = &apc->tx_qp[i].txq;
3265 while ((skb = skb_dequeue(&txq->pending_skbs))) {
3266 mana_unmap_skb(skb, apc);
3267 dev_kfree_skb_any(skb);
3268 }
3269 atomic_set(&txq->pending_sends, 0);
3270 }
3271 /* We're 100% sure the queues can no longer be woken up, because
3272 * we're sure now mana_poll_tx_cq() can't be running.
3273 */
3274
3275 apc->rss_state = TRI_STATE_FALSE;
3276 err = mana_config_rss(apc, TRI_STATE_FALSE, false, false);
3277 if (err && mana_en_need_log(apc, err))
3278 netdev_err(ndev, "Failed to disable vPort: %d\n", err);
3279
3280 /* Even in err case, still need to cleanup the vPort */
3281 mana_destroy_vport(apc);
3282
3283 return 0;
3284 }
3285
mana_detach(struct net_device * ndev,bool from_close)3286 int mana_detach(struct net_device *ndev, bool from_close)
3287 {
3288 struct mana_port_context *apc = netdev_priv(ndev);
3289 int err;
3290
3291 ASSERT_RTNL();
3292
3293 apc->port_st_save = apc->port_is_up;
3294 apc->port_is_up = false;
3295
3296 /* Ensure port state updated before txq state */
3297 smp_wmb();
3298
3299 netif_tx_disable(ndev);
3300
3301 if (apc->port_st_save) {
3302 err = mana_dealloc_queues(ndev);
3303 if (err) {
3304 netdev_err(ndev, "%s failed to deallocate queues: %d\n", __func__, err);
3305 return err;
3306 }
3307 }
3308
3309 if (!from_close) {
3310 netif_device_detach(ndev);
3311 mana_cleanup_port_context(apc);
3312 }
3313
3314 return 0;
3315 }
3316
mana_probe_port(struct mana_context * ac,int port_idx,struct net_device ** ndev_storage)3317 static int mana_probe_port(struct mana_context *ac, int port_idx,
3318 struct net_device **ndev_storage)
3319 {
3320 struct gdma_context *gc = ac->gdma_dev->gdma_context;
3321 struct mana_port_context *apc;
3322 struct net_device *ndev;
3323 int err;
3324
3325 ndev = alloc_etherdev_mq(sizeof(struct mana_port_context),
3326 gc->max_num_queues);
3327 if (!ndev)
3328 return -ENOMEM;
3329
3330 *ndev_storage = ndev;
3331
3332 apc = netdev_priv(ndev);
3333 apc->ac = ac;
3334 apc->ndev = ndev;
3335 apc->max_queues = gc->max_num_queues;
3336 apc->num_queues = gc->max_num_queues;
3337 apc->tx_queue_size = DEF_TX_BUFFERS_PER_QUEUE;
3338 apc->rx_queue_size = DEF_RX_BUFFERS_PER_QUEUE;
3339 apc->port_handle = INVALID_MANA_HANDLE;
3340 apc->pf_filter_handle = INVALID_MANA_HANDLE;
3341 apc->port_idx = port_idx;
3342
3343 mutex_init(&apc->vport_mutex);
3344 apc->vport_use_count = 0;
3345
3346 ndev->netdev_ops = &mana_devops;
3347 ndev->ethtool_ops = &mana_ethtool_ops;
3348 ndev->mtu = ETH_DATA_LEN;
3349 ndev->max_mtu = gc->adapter_mtu - ETH_HLEN;
3350 ndev->min_mtu = ETH_MIN_MTU;
3351 ndev->needed_headroom = MANA_HEADROOM;
3352 ndev->dev_port = port_idx;
3353 /* Recommended timeout based on HW FPGA re-config scenario. */
3354 ndev->watchdog_timeo = 15 * HZ;
3355 SET_NETDEV_DEV(ndev, gc->dev);
3356
3357 netif_set_tso_max_size(ndev, GSO_MAX_SIZE);
3358
3359 netif_carrier_off(ndev);
3360
3361 netdev_rss_key_fill(apc->hashkey, MANA_HASH_KEY_SIZE);
3362
3363 err = mana_init_port(ndev);
3364 if (err)
3365 goto free_net;
3366
3367 err = mana_rss_table_alloc(apc);
3368 if (err)
3369 goto reset_apc;
3370
3371 /* Initialize the per port queue reset work.*/
3372 INIT_WORK(&apc->queue_reset_work,
3373 mana_per_port_queue_reset_work_handler);
3374
3375 netdev_lockdep_set_classes(ndev);
3376
3377 ndev->hw_features = NETIF_F_SG | NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
3378 ndev->hw_features |= NETIF_F_RXCSUM;
3379 ndev->hw_features |= NETIF_F_TSO | NETIF_F_TSO6;
3380 ndev->hw_features |= NETIF_F_RXHASH;
3381 ndev->features = ndev->hw_features | NETIF_F_HW_VLAN_CTAG_TX |
3382 NETIF_F_HW_VLAN_CTAG_RX;
3383 ndev->vlan_features = ndev->features;
3384 xdp_set_features_flag(ndev, NETDEV_XDP_ACT_BASIC |
3385 NETDEV_XDP_ACT_REDIRECT |
3386 NETDEV_XDP_ACT_NDO_XMIT);
3387
3388 err = register_netdev(ndev);
3389 if (err) {
3390 netdev_err(ndev, "Unable to register netdev.\n");
3391 goto free_indir;
3392 }
3393
3394 netif_carrier_on(ndev);
3395
3396 debugfs_create_u32("current_speed", 0400, apc->mana_port_debugfs, &apc->speed);
3397
3398 return 0;
3399
3400 free_indir:
3401 mana_cleanup_indir_table(apc);
3402 reset_apc:
3403 mana_cleanup_port_context(apc);
3404 free_net:
3405 *ndev_storage = NULL;
3406 netdev_err(ndev, "Failed to probe vPort %d: %d\n", port_idx, err);
3407 free_netdev(ndev);
3408 return err;
3409 }
3410
adev_release(struct device * dev)3411 static void adev_release(struct device *dev)
3412 {
3413 struct mana_adev *madev = container_of(dev, struct mana_adev, adev.dev);
3414
3415 kfree(madev);
3416 }
3417
remove_adev(struct gdma_dev * gd)3418 static void remove_adev(struct gdma_dev *gd)
3419 {
3420 struct auxiliary_device *adev = gd->adev;
3421 int id = adev->id;
3422
3423 auxiliary_device_delete(adev);
3424 auxiliary_device_uninit(adev);
3425
3426 mana_adev_idx_free(id);
3427 gd->adev = NULL;
3428 }
3429
add_adev(struct gdma_dev * gd,const char * name)3430 static int add_adev(struct gdma_dev *gd, const char *name)
3431 {
3432 struct auxiliary_device *adev;
3433 struct mana_adev *madev;
3434 int ret;
3435 int id;
3436
3437 madev = kzalloc_obj(*madev);
3438 if (!madev)
3439 return -ENOMEM;
3440
3441 adev = &madev->adev;
3442 ret = mana_adev_idx_alloc();
3443 if (ret < 0)
3444 goto idx_fail;
3445 id = ret;
3446 adev->id = id;
3447
3448 adev->name = name;
3449 adev->dev.parent = gd->gdma_context->dev;
3450 adev->dev.release = adev_release;
3451 madev->mdev = gd;
3452
3453 ret = auxiliary_device_init(adev);
3454 if (ret)
3455 goto init_fail;
3456
3457 /* madev is owned by the auxiliary device */
3458 madev = NULL;
3459 ret = auxiliary_device_add(adev);
3460 if (ret)
3461 goto add_fail;
3462
3463 gd->adev = adev;
3464 dev_dbg(gd->gdma_context->dev,
3465 "Auxiliary device added successfully\n");
3466 return 0;
3467
3468 add_fail:
3469 auxiliary_device_uninit(adev);
3470
3471 init_fail:
3472 mana_adev_idx_free(id);
3473
3474 idx_fail:
3475 kfree(madev);
3476
3477 return ret;
3478 }
3479
mana_rdma_service_handle(struct work_struct * work)3480 static void mana_rdma_service_handle(struct work_struct *work)
3481 {
3482 struct mana_service_work *serv_work =
3483 container_of(work, struct mana_service_work, work);
3484 struct gdma_dev *gd = serv_work->gdma_dev;
3485 struct device *dev = gd->gdma_context->dev;
3486 int ret;
3487
3488 if (READ_ONCE(gd->rdma_teardown))
3489 goto out;
3490
3491 switch (serv_work->event) {
3492 case GDMA_SERVICE_TYPE_RDMA_SUSPEND:
3493 if (!gd->adev || gd->is_suspended)
3494 break;
3495
3496 remove_adev(gd);
3497 gd->is_suspended = true;
3498 break;
3499
3500 case GDMA_SERVICE_TYPE_RDMA_RESUME:
3501 if (!gd->is_suspended)
3502 break;
3503
3504 ret = add_adev(gd, "rdma");
3505 if (ret)
3506 dev_err(dev, "Failed to add adev on resume: %d\n", ret);
3507 else
3508 gd->is_suspended = false;
3509 break;
3510
3511 default:
3512 dev_warn(dev, "unknown adev service event %u\n",
3513 serv_work->event);
3514 break;
3515 }
3516
3517 out:
3518 kfree(serv_work);
3519 }
3520
mana_rdma_service_event(struct gdma_context * gc,enum gdma_service_type event)3521 int mana_rdma_service_event(struct gdma_context *gc, enum gdma_service_type event)
3522 {
3523 struct gdma_dev *gd = &gc->mana_ib;
3524 struct mana_service_work *serv_work;
3525
3526 if (gd->dev_id.type != GDMA_DEVICE_MANA_IB) {
3527 /* RDMA device is not detected on pci */
3528 return 0;
3529 }
3530
3531 serv_work = kzalloc_obj(*serv_work, GFP_ATOMIC);
3532 if (!serv_work)
3533 return -ENOMEM;
3534
3535 serv_work->event = event;
3536 serv_work->gdma_dev = gd;
3537
3538 INIT_WORK(&serv_work->work, mana_rdma_service_handle);
3539 queue_work(gc->service_wq, &serv_work->work);
3540
3541 return 0;
3542 }
3543
3544 #define MANA_GF_STATS_PERIOD (2 * HZ)
3545
mana_gf_stats_work_handler(struct work_struct * work)3546 static void mana_gf_stats_work_handler(struct work_struct *work)
3547 {
3548 struct mana_context *ac =
3549 container_of(to_delayed_work(work), struct mana_context, gf_stats_work);
3550 int err;
3551
3552 err = mana_query_gf_stats(ac);
3553 if (err == -ETIMEDOUT) {
3554 /* HWC timeout detected - reset stats and stop rescheduling */
3555 ac->hwc_timeout_occurred = true;
3556 memset(&ac->hc_stats, 0, sizeof(ac->hc_stats));
3557 return;
3558 }
3559 schedule_delayed_work(&ac->gf_stats_work, MANA_GF_STATS_PERIOD);
3560 }
3561
mana_probe(struct gdma_dev * gd,bool resuming)3562 int mana_probe(struct gdma_dev *gd, bool resuming)
3563 {
3564 struct gdma_context *gc = gd->gdma_context;
3565 struct mana_context *ac = gd->driver_data;
3566 struct mana_port_context *apc = NULL;
3567 struct device *dev = gc->dev;
3568 u8 bm_hostmode = 0;
3569 u16 num_ports = 0;
3570 int err;
3571 int i;
3572
3573 dev_info(dev,
3574 "Microsoft Azure Network Adapter protocol version: %d.%d.%d\n",
3575 MANA_MAJOR_VERSION, MANA_MINOR_VERSION, MANA_MICRO_VERSION);
3576
3577 err = mana_gd_register_device(gd);
3578 if (err)
3579 return err;
3580
3581 if (!resuming) {
3582 ac = kzalloc_obj(*ac);
3583 if (!ac)
3584 return -ENOMEM;
3585
3586 ac->gdma_dev = gd;
3587 gd->driver_data = ac;
3588 }
3589
3590 err = mana_create_eq(ac);
3591 if (err) {
3592 dev_err(dev, "Failed to create EQs: %d\n", err);
3593 goto out;
3594 }
3595
3596 err = mana_query_device_cfg(ac, MANA_MAJOR_VERSION, MANA_MINOR_VERSION,
3597 MANA_MICRO_VERSION, &num_ports, &bm_hostmode);
3598 if (err)
3599 goto out;
3600
3601 ac->bm_hostmode = bm_hostmode;
3602
3603 if (!resuming) {
3604 ac->num_ports = num_ports;
3605
3606 INIT_WORK(&ac->link_change_work, mana_link_state_handle);
3607 } else {
3608 if (ac->num_ports != num_ports) {
3609 dev_err(dev, "The number of vPorts changed: %d->%d\n",
3610 ac->num_ports, num_ports);
3611 err = -EPROTO;
3612 goto out;
3613 }
3614
3615 enable_work(&ac->link_change_work);
3616 }
3617
3618 if (ac->num_ports == 0)
3619 dev_err(dev, "Failed to detect any vPort\n");
3620
3621 if (ac->num_ports > MAX_PORTS_IN_MANA_DEV)
3622 ac->num_ports = MAX_PORTS_IN_MANA_DEV;
3623
3624 ac->per_port_queue_reset_wq =
3625 create_singlethread_workqueue("mana_per_port_queue_reset_wq");
3626 if (!ac->per_port_queue_reset_wq) {
3627 dev_err(dev, "Failed to allocate per port queue reset workqueue\n");
3628 err = -ENOMEM;
3629 goto out;
3630 }
3631
3632 if (!resuming) {
3633 for (i = 0; i < ac->num_ports; i++) {
3634 err = mana_probe_port(ac, i, &ac->ports[i]);
3635 /* we log the port for which the probe failed and stop
3636 * probes for subsequent ports.
3637 * Note that we keep running ports, for which the probes
3638 * were successful, unless add_adev fails too
3639 */
3640 if (err) {
3641 dev_err(dev, "Probe Failed for port %d\n", i);
3642 break;
3643 }
3644 }
3645 } else {
3646 for (i = 0; i < ac->num_ports; i++) {
3647 rtnl_lock();
3648 apc = netdev_priv(ac->ports[i]);
3649 enable_work(&apc->queue_reset_work);
3650 err = mana_attach(ac->ports[i]);
3651 rtnl_unlock();
3652 /* we log the port for which the attach failed and stop
3653 * attach for subsequent ports
3654 * Note that we keep running ports, for which the attach
3655 * were successful, unless add_adev fails too
3656 */
3657 if (err) {
3658 dev_err(dev, "Attach Failed for port %d\n", i);
3659 break;
3660 }
3661 }
3662 }
3663
3664 err = add_adev(gd, "eth");
3665
3666 INIT_DELAYED_WORK(&ac->gf_stats_work, mana_gf_stats_work_handler);
3667 schedule_delayed_work(&ac->gf_stats_work, MANA_GF_STATS_PERIOD);
3668
3669 out:
3670 if (err) {
3671 mana_remove(gd, false);
3672 } else {
3673 dev_dbg(dev, "gd=%p, id=%u, num_ports=%d, type=%u, instance=%u\n",
3674 gd, gd->dev_id.as_uint32, ac->num_ports,
3675 gd->dev_id.type, gd->dev_id.instance);
3676 dev_dbg(dev, "%s succeeded\n", __func__);
3677 }
3678
3679 return err;
3680 }
3681
mana_remove(struct gdma_dev * gd,bool suspending)3682 void mana_remove(struct gdma_dev *gd, bool suspending)
3683 {
3684 struct gdma_context *gc = gd->gdma_context;
3685 struct mana_context *ac = gd->driver_data;
3686 struct mana_port_context *apc;
3687 struct device *dev = gc->dev;
3688 struct net_device *ndev;
3689 int err;
3690 int i;
3691
3692 disable_work_sync(&ac->link_change_work);
3693 cancel_delayed_work_sync(&ac->gf_stats_work);
3694
3695 /* adev currently doesn't support suspending, always remove it */
3696 if (gd->adev)
3697 remove_adev(gd);
3698
3699 for (i = 0; i < ac->num_ports; i++) {
3700 ndev = ac->ports[i];
3701 if (!ndev) {
3702 if (i == 0)
3703 dev_err(dev, "No net device to remove\n");
3704 goto out;
3705 }
3706
3707 apc = netdev_priv(ndev);
3708 disable_work_sync(&apc->queue_reset_work);
3709
3710 /* All cleanup actions should stay after rtnl_lock(), otherwise
3711 * other functions may access partially cleaned up data.
3712 */
3713 rtnl_lock();
3714
3715 err = mana_detach(ndev, false);
3716 if (err)
3717 netdev_err(ndev, "Failed to detach vPort %d: %d\n",
3718 i, err);
3719
3720 if (suspending) {
3721 /* No need to unregister the ndev. */
3722 rtnl_unlock();
3723 continue;
3724 }
3725
3726 unregister_netdevice(ndev);
3727 mana_cleanup_indir_table(apc);
3728
3729 rtnl_unlock();
3730
3731 free_netdev(ndev);
3732 }
3733
3734 mana_destroy_eq(ac);
3735 out:
3736 if (ac->per_port_queue_reset_wq) {
3737 destroy_workqueue(ac->per_port_queue_reset_wq);
3738 ac->per_port_queue_reset_wq = NULL;
3739 }
3740
3741 mana_gd_deregister_device(gd);
3742
3743 if (suspending)
3744 return;
3745
3746 gd->driver_data = NULL;
3747 gd->gdma_context = NULL;
3748 kfree(ac);
3749 dev_dbg(dev, "%s succeeded\n", __func__);
3750 }
3751
mana_rdma_probe(struct gdma_dev * gd)3752 int mana_rdma_probe(struct gdma_dev *gd)
3753 {
3754 int err = 0;
3755
3756 if (gd->dev_id.type != GDMA_DEVICE_MANA_IB) {
3757 /* RDMA device is not detected on pci */
3758 return err;
3759 }
3760
3761 err = mana_gd_register_device(gd);
3762 if (err)
3763 return err;
3764
3765 err = add_adev(gd, "rdma");
3766 if (err)
3767 mana_gd_deregister_device(gd);
3768
3769 return err;
3770 }
3771
mana_rdma_remove(struct gdma_dev * gd)3772 void mana_rdma_remove(struct gdma_dev *gd)
3773 {
3774 struct gdma_context *gc = gd->gdma_context;
3775
3776 if (gd->dev_id.type != GDMA_DEVICE_MANA_IB) {
3777 /* RDMA device is not detected on pci */
3778 return;
3779 }
3780
3781 WRITE_ONCE(gd->rdma_teardown, true);
3782
3783 if (gc->service_wq)
3784 flush_workqueue(gc->service_wq);
3785
3786 if (gd->adev)
3787 remove_adev(gd);
3788
3789 mana_gd_deregister_device(gd);
3790 }
3791
mana_get_primary_netdev(struct mana_context * ac,u32 port_index,netdevice_tracker * tracker)3792 struct net_device *mana_get_primary_netdev(struct mana_context *ac,
3793 u32 port_index,
3794 netdevice_tracker *tracker)
3795 {
3796 struct net_device *ndev;
3797
3798 if (port_index >= ac->num_ports)
3799 return NULL;
3800
3801 rcu_read_lock();
3802
3803 /* If mana is used in netvsc, the upper netdevice should be returned. */
3804 ndev = netdev_master_upper_dev_get_rcu(ac->ports[port_index]);
3805
3806 /* If there is no upper device, use the parent Ethernet device */
3807 if (!ndev)
3808 ndev = ac->ports[port_index];
3809
3810 netdev_hold(ndev, tracker, GFP_ATOMIC);
3811 rcu_read_unlock();
3812
3813 return ndev;
3814 }
3815 EXPORT_SYMBOL_NS(mana_get_primary_netdev, "NET_MANA");
3816