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