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
14 #include <net/checksum.h>
15 #include <net/ip6_checksum.h>
16 #include <net/netdev_lock.h>
17 #include <net/page_pool/helpers.h>
18 #include <net/xdp.h>
19
20 #include <net/mana/mana.h>
21 #include <net/mana/mana_auxiliary.h>
22
23 static DEFINE_IDA(mana_adev_ida);
24
mana_adev_idx_alloc(void)25 static int mana_adev_idx_alloc(void)
26 {
27 return ida_alloc(&mana_adev_ida, GFP_KERNEL);
28 }
29
mana_adev_idx_free(int idx)30 static void mana_adev_idx_free(int idx)
31 {
32 ida_free(&mana_adev_ida, idx);
33 }
34
mana_dbg_q_read(struct file * filp,char __user * buf,size_t count,loff_t * pos)35 static ssize_t mana_dbg_q_read(struct file *filp, char __user *buf, size_t count,
36 loff_t *pos)
37 {
38 struct gdma_queue *gdma_q = filp->private_data;
39
40 return simple_read_from_buffer(buf, count, pos, gdma_q->queue_mem_ptr,
41 gdma_q->queue_size);
42 }
43
44 static const struct file_operations mana_dbg_q_fops = {
45 .owner = THIS_MODULE,
46 .open = simple_open,
47 .read = mana_dbg_q_read,
48 };
49
50 /* Microsoft Azure Network Adapter (MANA) functions */
51
mana_open(struct net_device * ndev)52 static int mana_open(struct net_device *ndev)
53 {
54 struct mana_port_context *apc = netdev_priv(ndev);
55 int err;
56 err = mana_alloc_queues(ndev);
57
58 if (err) {
59 netdev_err(ndev, "%s failed to allocate queues: %d\n", __func__, err);
60 return err;
61 }
62
63 apc->port_is_up = true;
64
65 /* Ensure port state updated before txq state */
66 smp_wmb();
67
68 netif_carrier_on(ndev);
69 netif_tx_wake_all_queues(ndev);
70 netdev_dbg(ndev, "%s successful\n", __func__);
71 return 0;
72 }
73
mana_close(struct net_device * ndev)74 static int mana_close(struct net_device *ndev)
75 {
76 struct mana_port_context *apc = netdev_priv(ndev);
77
78 if (!apc->port_is_up)
79 return 0;
80
81 return mana_detach(ndev, true);
82 }
83
mana_can_tx(struct gdma_queue * wq)84 static bool mana_can_tx(struct gdma_queue *wq)
85 {
86 return mana_gd_wq_avail_space(wq) >= MAX_TX_WQE_SIZE;
87 }
88
mana_checksum_info(struct sk_buff * skb)89 static unsigned int mana_checksum_info(struct sk_buff *skb)
90 {
91 if (skb->protocol == htons(ETH_P_IP)) {
92 struct iphdr *ip = ip_hdr(skb);
93
94 if (ip->protocol == IPPROTO_TCP)
95 return IPPROTO_TCP;
96
97 if (ip->protocol == IPPROTO_UDP)
98 return IPPROTO_UDP;
99 } else if (skb->protocol == htons(ETH_P_IPV6)) {
100 struct ipv6hdr *ip6 = ipv6_hdr(skb);
101
102 if (ip6->nexthdr == IPPROTO_TCP)
103 return IPPROTO_TCP;
104
105 if (ip6->nexthdr == IPPROTO_UDP)
106 return IPPROTO_UDP;
107 }
108
109 /* No csum offloading */
110 return 0;
111 }
112
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)113 static void mana_add_sge(struct mana_tx_package *tp, struct mana_skb_head *ash,
114 int sg_i, dma_addr_t da, int sge_len, u32 gpa_mkey)
115 {
116 ash->dma_handle[sg_i] = da;
117 ash->size[sg_i] = sge_len;
118
119 tp->wqe_req.sgl[sg_i].address = da;
120 tp->wqe_req.sgl[sg_i].mem_key = gpa_mkey;
121 tp->wqe_req.sgl[sg_i].size = sge_len;
122 }
123
mana_map_skb(struct sk_buff * skb,struct mana_port_context * apc,struct mana_tx_package * tp,int gso_hs)124 static int mana_map_skb(struct sk_buff *skb, struct mana_port_context *apc,
125 struct mana_tx_package *tp, int gso_hs)
126 {
127 struct mana_skb_head *ash = (struct mana_skb_head *)skb->head;
128 int hsg = 1; /* num of SGEs of linear part */
129 struct gdma_dev *gd = apc->ac->gdma_dev;
130 int skb_hlen = skb_headlen(skb);
131 int sge0_len, sge1_len = 0;
132 struct gdma_context *gc;
133 struct device *dev;
134 skb_frag_t *frag;
135 dma_addr_t da;
136 int sg_i;
137 int i;
138
139 gc = gd->gdma_context;
140 dev = gc->dev;
141
142 if (gso_hs && gso_hs < skb_hlen) {
143 sge0_len = gso_hs;
144 sge1_len = skb_hlen - gso_hs;
145 } else {
146 sge0_len = skb_hlen;
147 }
148
149 da = dma_map_single(dev, skb->data, sge0_len, DMA_TO_DEVICE);
150 if (dma_mapping_error(dev, da))
151 return -ENOMEM;
152
153 mana_add_sge(tp, ash, 0, da, sge0_len, gd->gpa_mkey);
154
155 if (sge1_len) {
156 sg_i = 1;
157 da = dma_map_single(dev, skb->data + sge0_len, sge1_len,
158 DMA_TO_DEVICE);
159 if (dma_mapping_error(dev, da))
160 goto frag_err;
161
162 mana_add_sge(tp, ash, sg_i, da, sge1_len, gd->gpa_mkey);
163 hsg = 2;
164 }
165
166 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
167 sg_i = hsg + i;
168
169 frag = &skb_shinfo(skb)->frags[i];
170 da = skb_frag_dma_map(dev, frag, 0, skb_frag_size(frag),
171 DMA_TO_DEVICE);
172 if (dma_mapping_error(dev, da))
173 goto frag_err;
174
175 mana_add_sge(tp, ash, sg_i, da, skb_frag_size(frag),
176 gd->gpa_mkey);
177 }
178
179 return 0;
180
181 frag_err:
182 if (net_ratelimit())
183 netdev_err(apc->ndev, "Failed to map skb of size %u to DMA\n",
184 skb->len);
185 for (i = sg_i - 1; i >= hsg; i--)
186 dma_unmap_page(dev, ash->dma_handle[i], ash->size[i],
187 DMA_TO_DEVICE);
188
189 for (i = hsg - 1; i >= 0; i--)
190 dma_unmap_single(dev, ash->dma_handle[i], ash->size[i],
191 DMA_TO_DEVICE);
192
193 return -ENOMEM;
194 }
195
196 /* Handle the case when GSO SKB linear length is too large.
197 * MANA NIC requires GSO packets to put only the packet header to SGE0.
198 * So, we need 2 SGEs for the skb linear part which contains more than the
199 * header.
200 * Return a positive value for the number of SGEs, or a negative value
201 * for an error.
202 */
mana_fix_skb_head(struct net_device * ndev,struct sk_buff * skb,int gso_hs)203 static int mana_fix_skb_head(struct net_device *ndev, struct sk_buff *skb,
204 int gso_hs)
205 {
206 int num_sge = 1 + skb_shinfo(skb)->nr_frags;
207 int skb_hlen = skb_headlen(skb);
208
209 if (gso_hs < skb_hlen) {
210 num_sge++;
211 } else if (gso_hs > skb_hlen) {
212 if (net_ratelimit())
213 netdev_err(ndev,
214 "TX nonlinear head: hs:%d, skb_hlen:%d\n",
215 gso_hs, skb_hlen);
216
217 return -EINVAL;
218 }
219
220 return num_sge;
221 }
222
223 /* Get the GSO packet's header size */
mana_get_gso_hs(struct sk_buff * skb)224 static int mana_get_gso_hs(struct sk_buff *skb)
225 {
226 int gso_hs;
227
228 if (skb->encapsulation) {
229 gso_hs = skb_inner_tcp_all_headers(skb);
230 } else {
231 if (skb_shinfo(skb)->gso_type & SKB_GSO_UDP_L4) {
232 gso_hs = skb_transport_offset(skb) +
233 sizeof(struct udphdr);
234 } else {
235 gso_hs = skb_tcp_all_headers(skb);
236 }
237 }
238
239 return gso_hs;
240 }
241
mana_start_xmit(struct sk_buff * skb,struct net_device * ndev)242 netdev_tx_t mana_start_xmit(struct sk_buff *skb, struct net_device *ndev)
243 {
244 enum mana_tx_pkt_format pkt_fmt = MANA_SHORT_PKT_FMT;
245 struct mana_port_context *apc = netdev_priv(ndev);
246 int gso_hs = 0; /* zero for non-GSO pkts */
247 u16 txq_idx = skb_get_queue_mapping(skb);
248 struct gdma_dev *gd = apc->ac->gdma_dev;
249 bool ipv4 = false, ipv6 = false;
250 struct mana_tx_package pkg = {};
251 struct netdev_queue *net_txq;
252 struct mana_stats_tx *tx_stats;
253 struct gdma_queue *gdma_sq;
254 unsigned int csum_type;
255 struct mana_txq *txq;
256 struct mana_cq *cq;
257 int err, len;
258
259 if (unlikely(!apc->port_is_up))
260 goto tx_drop;
261
262 if (skb_cow_head(skb, MANA_HEADROOM))
263 goto tx_drop_count;
264
265 if (unlikely(ipv6_hopopt_jumbo_remove(skb)))
266 goto tx_drop_count;
267
268 txq = &apc->tx_qp[txq_idx].txq;
269 gdma_sq = txq->gdma_sq;
270 cq = &apc->tx_qp[txq_idx].tx_cq;
271 tx_stats = &txq->stats;
272
273 pkg.tx_oob.s_oob.vcq_num = cq->gdma_id;
274 pkg.tx_oob.s_oob.vsq_frame = txq->vsq_frame;
275
276 if (txq->vp_offset > MANA_SHORT_VPORT_OFFSET_MAX) {
277 pkg.tx_oob.l_oob.long_vp_offset = txq->vp_offset;
278 pkt_fmt = MANA_LONG_PKT_FMT;
279 } else {
280 pkg.tx_oob.s_oob.short_vp_offset = txq->vp_offset;
281 }
282
283 if (skb_vlan_tag_present(skb)) {
284 pkt_fmt = MANA_LONG_PKT_FMT;
285 pkg.tx_oob.l_oob.inject_vlan_pri_tag = 1;
286 pkg.tx_oob.l_oob.pcp = skb_vlan_tag_get_prio(skb);
287 pkg.tx_oob.l_oob.dei = skb_vlan_tag_get_cfi(skb);
288 pkg.tx_oob.l_oob.vlan_id = skb_vlan_tag_get_id(skb);
289 }
290
291 pkg.tx_oob.s_oob.pkt_fmt = pkt_fmt;
292
293 if (pkt_fmt == MANA_SHORT_PKT_FMT) {
294 pkg.wqe_req.inline_oob_size = sizeof(struct mana_tx_short_oob);
295 u64_stats_update_begin(&tx_stats->syncp);
296 tx_stats->short_pkt_fmt++;
297 u64_stats_update_end(&tx_stats->syncp);
298 } else {
299 pkg.wqe_req.inline_oob_size = sizeof(struct mana_tx_oob);
300 u64_stats_update_begin(&tx_stats->syncp);
301 tx_stats->long_pkt_fmt++;
302 u64_stats_update_end(&tx_stats->syncp);
303 }
304
305 pkg.wqe_req.inline_oob_data = &pkg.tx_oob;
306 pkg.wqe_req.flags = 0;
307 pkg.wqe_req.client_data_unit = 0;
308
309 pkg.wqe_req.num_sge = 1 + skb_shinfo(skb)->nr_frags;
310
311 if (skb->protocol == htons(ETH_P_IP))
312 ipv4 = true;
313 else if (skb->protocol == htons(ETH_P_IPV6))
314 ipv6 = true;
315
316 if (skb_is_gso(skb)) {
317 int num_sge;
318
319 gso_hs = mana_get_gso_hs(skb);
320
321 num_sge = mana_fix_skb_head(ndev, skb, gso_hs);
322 if (num_sge > 0)
323 pkg.wqe_req.num_sge = num_sge;
324 else
325 goto tx_drop_count;
326
327 u64_stats_update_begin(&tx_stats->syncp);
328 if (skb->encapsulation) {
329 tx_stats->tso_inner_packets++;
330 tx_stats->tso_inner_bytes += skb->len - gso_hs;
331 } else {
332 tx_stats->tso_packets++;
333 tx_stats->tso_bytes += skb->len - gso_hs;
334 }
335 u64_stats_update_end(&tx_stats->syncp);
336
337 pkg.tx_oob.s_oob.is_outer_ipv4 = ipv4;
338 pkg.tx_oob.s_oob.is_outer_ipv6 = ipv6;
339
340 pkg.tx_oob.s_oob.comp_iphdr_csum = 1;
341 pkg.tx_oob.s_oob.comp_tcp_csum = 1;
342 pkg.tx_oob.s_oob.trans_off = skb_transport_offset(skb);
343
344 pkg.wqe_req.client_data_unit = skb_shinfo(skb)->gso_size;
345 pkg.wqe_req.flags = GDMA_WR_OOB_IN_SGL | GDMA_WR_PAD_BY_SGE0;
346 if (ipv4) {
347 ip_hdr(skb)->tot_len = 0;
348 ip_hdr(skb)->check = 0;
349 tcp_hdr(skb)->check =
350 ~csum_tcpudp_magic(ip_hdr(skb)->saddr,
351 ip_hdr(skb)->daddr, 0,
352 IPPROTO_TCP, 0);
353 } else {
354 ipv6_hdr(skb)->payload_len = 0;
355 tcp_hdr(skb)->check =
356 ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
357 &ipv6_hdr(skb)->daddr, 0,
358 IPPROTO_TCP, 0);
359 }
360 } else if (skb->ip_summed == CHECKSUM_PARTIAL) {
361 csum_type = mana_checksum_info(skb);
362
363 u64_stats_update_begin(&tx_stats->syncp);
364 tx_stats->csum_partial++;
365 u64_stats_update_end(&tx_stats->syncp);
366
367 if (csum_type == IPPROTO_TCP) {
368 pkg.tx_oob.s_oob.is_outer_ipv4 = ipv4;
369 pkg.tx_oob.s_oob.is_outer_ipv6 = ipv6;
370
371 pkg.tx_oob.s_oob.comp_tcp_csum = 1;
372 pkg.tx_oob.s_oob.trans_off = skb_transport_offset(skb);
373
374 } else if (csum_type == IPPROTO_UDP) {
375 pkg.tx_oob.s_oob.is_outer_ipv4 = ipv4;
376 pkg.tx_oob.s_oob.is_outer_ipv6 = ipv6;
377
378 pkg.tx_oob.s_oob.comp_udp_csum = 1;
379 } else {
380 /* Can't do offload of this type of checksum */
381 if (skb_checksum_help(skb))
382 goto tx_drop_count;
383 }
384 }
385
386 WARN_ON_ONCE(pkg.wqe_req.num_sge > MAX_TX_WQE_SGL_ENTRIES);
387
388 if (pkg.wqe_req.num_sge <= ARRAY_SIZE(pkg.sgl_array)) {
389 pkg.wqe_req.sgl = pkg.sgl_array;
390 } else {
391 pkg.sgl_ptr = kmalloc_array(pkg.wqe_req.num_sge,
392 sizeof(struct gdma_sge),
393 GFP_ATOMIC);
394 if (!pkg.sgl_ptr)
395 goto tx_drop_count;
396
397 pkg.wqe_req.sgl = pkg.sgl_ptr;
398 }
399
400 if (mana_map_skb(skb, apc, &pkg, gso_hs)) {
401 u64_stats_update_begin(&tx_stats->syncp);
402 tx_stats->mana_map_err++;
403 u64_stats_update_end(&tx_stats->syncp);
404 goto free_sgl_ptr;
405 }
406
407 skb_queue_tail(&txq->pending_skbs, skb);
408
409 len = skb->len;
410 net_txq = netdev_get_tx_queue(ndev, txq_idx);
411
412 err = mana_gd_post_work_request(gdma_sq, &pkg.wqe_req,
413 (struct gdma_posted_wqe_info *)skb->cb);
414 if (!mana_can_tx(gdma_sq)) {
415 netif_tx_stop_queue(net_txq);
416 apc->eth_stats.stop_queue++;
417 }
418
419 if (err) {
420 (void)skb_dequeue_tail(&txq->pending_skbs);
421 netdev_warn(ndev, "Failed to post TX OOB: %d\n", err);
422 err = NETDEV_TX_BUSY;
423 goto tx_busy;
424 }
425
426 err = NETDEV_TX_OK;
427 atomic_inc(&txq->pending_sends);
428
429 mana_gd_wq_ring_doorbell(gd->gdma_context, gdma_sq);
430
431 /* skb may be freed after mana_gd_post_work_request. Do not use it. */
432 skb = NULL;
433
434 tx_stats = &txq->stats;
435 u64_stats_update_begin(&tx_stats->syncp);
436 tx_stats->packets++;
437 tx_stats->bytes += len;
438 u64_stats_update_end(&tx_stats->syncp);
439
440 tx_busy:
441 if (netif_tx_queue_stopped(net_txq) && mana_can_tx(gdma_sq)) {
442 netif_tx_wake_queue(net_txq);
443 apc->eth_stats.wake_queue++;
444 }
445
446 kfree(pkg.sgl_ptr);
447 return err;
448
449 free_sgl_ptr:
450 kfree(pkg.sgl_ptr);
451 tx_drop_count:
452 ndev->stats.tx_dropped++;
453 tx_drop:
454 dev_kfree_skb_any(skb);
455 return NETDEV_TX_OK;
456 }
457
mana_get_stats64(struct net_device * ndev,struct rtnl_link_stats64 * st)458 static void mana_get_stats64(struct net_device *ndev,
459 struct rtnl_link_stats64 *st)
460 {
461 struct mana_port_context *apc = netdev_priv(ndev);
462 unsigned int num_queues = apc->num_queues;
463 struct mana_stats_rx *rx_stats;
464 struct mana_stats_tx *tx_stats;
465 unsigned int start;
466 u64 packets, bytes;
467 int q;
468
469 if (!apc->port_is_up)
470 return;
471
472 netdev_stats_to_stats64(st, &ndev->stats);
473
474 for (q = 0; q < num_queues; q++) {
475 rx_stats = &apc->rxqs[q]->stats;
476
477 do {
478 start = u64_stats_fetch_begin(&rx_stats->syncp);
479 packets = rx_stats->packets;
480 bytes = rx_stats->bytes;
481 } while (u64_stats_fetch_retry(&rx_stats->syncp, start));
482
483 st->rx_packets += packets;
484 st->rx_bytes += bytes;
485 }
486
487 for (q = 0; q < num_queues; q++) {
488 tx_stats = &apc->tx_qp[q].txq.stats;
489
490 do {
491 start = u64_stats_fetch_begin(&tx_stats->syncp);
492 packets = tx_stats->packets;
493 bytes = tx_stats->bytes;
494 } while (u64_stats_fetch_retry(&tx_stats->syncp, start));
495
496 st->tx_packets += packets;
497 st->tx_bytes += bytes;
498 }
499 }
500
mana_get_tx_queue(struct net_device * ndev,struct sk_buff * skb,int old_q)501 static int mana_get_tx_queue(struct net_device *ndev, struct sk_buff *skb,
502 int old_q)
503 {
504 struct mana_port_context *apc = netdev_priv(ndev);
505 u32 hash = skb_get_hash(skb);
506 struct sock *sk = skb->sk;
507 int txq;
508
509 txq = apc->indir_table[hash & (apc->indir_table_sz - 1)];
510
511 if (txq != old_q && sk && sk_fullsock(sk) &&
512 rcu_access_pointer(sk->sk_dst_cache))
513 sk_tx_queue_set(sk, txq);
514
515 return txq;
516 }
517
mana_select_queue(struct net_device * ndev,struct sk_buff * skb,struct net_device * sb_dev)518 static u16 mana_select_queue(struct net_device *ndev, struct sk_buff *skb,
519 struct net_device *sb_dev)
520 {
521 int txq;
522
523 if (ndev->real_num_tx_queues == 1)
524 return 0;
525
526 txq = sk_tx_queue_get(skb->sk);
527
528 if (txq < 0 || skb->ooo_okay || txq >= ndev->real_num_tx_queues) {
529 if (skb_rx_queue_recorded(skb))
530 txq = skb_get_rx_queue(skb);
531 else
532 txq = mana_get_tx_queue(ndev, skb, txq);
533 }
534
535 return txq;
536 }
537
538 /* Release pre-allocated RX buffers */
mana_pre_dealloc_rxbufs(struct mana_port_context * mpc)539 void mana_pre_dealloc_rxbufs(struct mana_port_context *mpc)
540 {
541 struct device *dev;
542 int i;
543
544 dev = mpc->ac->gdma_dev->gdma_context->dev;
545
546 if (!mpc->rxbufs_pre)
547 goto out1;
548
549 if (!mpc->das_pre)
550 goto out2;
551
552 while (mpc->rxbpre_total) {
553 i = --mpc->rxbpre_total;
554 dma_unmap_single(dev, mpc->das_pre[i], mpc->rxbpre_datasize,
555 DMA_FROM_DEVICE);
556 put_page(virt_to_head_page(mpc->rxbufs_pre[i]));
557 }
558
559 kfree(mpc->das_pre);
560 mpc->das_pre = NULL;
561
562 out2:
563 kfree(mpc->rxbufs_pre);
564 mpc->rxbufs_pre = NULL;
565
566 out1:
567 mpc->rxbpre_datasize = 0;
568 mpc->rxbpre_alloc_size = 0;
569 mpc->rxbpre_headroom = 0;
570 }
571
572 /* Get a buffer from the pre-allocated RX buffers */
mana_get_rxbuf_pre(struct mana_rxq * rxq,dma_addr_t * da)573 static void *mana_get_rxbuf_pre(struct mana_rxq *rxq, dma_addr_t *da)
574 {
575 struct net_device *ndev = rxq->ndev;
576 struct mana_port_context *mpc;
577 void *va;
578
579 mpc = netdev_priv(ndev);
580
581 if (!mpc->rxbufs_pre || !mpc->das_pre || !mpc->rxbpre_total) {
582 netdev_err(ndev, "No RX pre-allocated bufs\n");
583 return NULL;
584 }
585
586 /* Check sizes to catch unexpected coding error */
587 if (mpc->rxbpre_datasize != rxq->datasize) {
588 netdev_err(ndev, "rxbpre_datasize mismatch: %u: %u\n",
589 mpc->rxbpre_datasize, rxq->datasize);
590 return NULL;
591 }
592
593 if (mpc->rxbpre_alloc_size != rxq->alloc_size) {
594 netdev_err(ndev, "rxbpre_alloc_size mismatch: %u: %u\n",
595 mpc->rxbpre_alloc_size, rxq->alloc_size);
596 return NULL;
597 }
598
599 if (mpc->rxbpre_headroom != rxq->headroom) {
600 netdev_err(ndev, "rxbpre_headroom mismatch: %u: %u\n",
601 mpc->rxbpre_headroom, rxq->headroom);
602 return NULL;
603 }
604
605 mpc->rxbpre_total--;
606
607 *da = mpc->das_pre[mpc->rxbpre_total];
608 va = mpc->rxbufs_pre[mpc->rxbpre_total];
609 mpc->rxbufs_pre[mpc->rxbpre_total] = NULL;
610
611 /* Deallocate the array after all buffers are gone */
612 if (!mpc->rxbpre_total)
613 mana_pre_dealloc_rxbufs(mpc);
614
615 return va;
616 }
617
618 /* Get RX buffer's data size, alloc size, XDP headroom based on MTU */
mana_get_rxbuf_cfg(int mtu,u32 * datasize,u32 * alloc_size,u32 * headroom)619 static void mana_get_rxbuf_cfg(int mtu, u32 *datasize, u32 *alloc_size,
620 u32 *headroom)
621 {
622 if (mtu > MANA_XDP_MTU_MAX)
623 *headroom = 0; /* no support for XDP */
624 else
625 *headroom = XDP_PACKET_HEADROOM;
626
627 *alloc_size = SKB_DATA_ALIGN(mtu + MANA_RXBUF_PAD + *headroom);
628
629 /* Using page pool in this case, so alloc_size is PAGE_SIZE */
630 if (*alloc_size < PAGE_SIZE)
631 *alloc_size = PAGE_SIZE;
632
633 *datasize = mtu + ETH_HLEN;
634 }
635
mana_pre_alloc_rxbufs(struct mana_port_context * mpc,int new_mtu,int num_queues)636 int mana_pre_alloc_rxbufs(struct mana_port_context *mpc, int new_mtu, int num_queues)
637 {
638 struct device *dev;
639 struct page *page;
640 dma_addr_t da;
641 int num_rxb;
642 void *va;
643 int i;
644
645 mana_get_rxbuf_cfg(new_mtu, &mpc->rxbpre_datasize,
646 &mpc->rxbpre_alloc_size, &mpc->rxbpre_headroom);
647
648 dev = mpc->ac->gdma_dev->gdma_context->dev;
649
650 num_rxb = num_queues * mpc->rx_queue_size;
651
652 WARN(mpc->rxbufs_pre, "mana rxbufs_pre exists\n");
653 mpc->rxbufs_pre = kmalloc_array(num_rxb, sizeof(void *), GFP_KERNEL);
654 if (!mpc->rxbufs_pre)
655 goto error;
656
657 mpc->das_pre = kmalloc_array(num_rxb, sizeof(dma_addr_t), GFP_KERNEL);
658 if (!mpc->das_pre)
659 goto error;
660
661 mpc->rxbpre_total = 0;
662
663 for (i = 0; i < num_rxb; i++) {
664 page = dev_alloc_pages(get_order(mpc->rxbpre_alloc_size));
665 if (!page)
666 goto error;
667
668 va = page_to_virt(page);
669
670 da = dma_map_single(dev, va + mpc->rxbpre_headroom,
671 mpc->rxbpre_datasize, DMA_FROM_DEVICE);
672 if (dma_mapping_error(dev, da)) {
673 put_page(page);
674 goto error;
675 }
676
677 mpc->rxbufs_pre[i] = va;
678 mpc->das_pre[i] = da;
679 mpc->rxbpre_total = i + 1;
680 }
681
682 return 0;
683
684 error:
685 netdev_err(mpc->ndev, "Failed to pre-allocate RX buffers for %d queues\n", num_queues);
686 mana_pre_dealloc_rxbufs(mpc);
687 return -ENOMEM;
688 }
689
mana_change_mtu(struct net_device * ndev,int new_mtu)690 static int mana_change_mtu(struct net_device *ndev, int new_mtu)
691 {
692 struct mana_port_context *mpc = netdev_priv(ndev);
693 unsigned int old_mtu = ndev->mtu;
694 int err;
695
696 /* Pre-allocate buffers to prevent failure in mana_attach later */
697 err = mana_pre_alloc_rxbufs(mpc, new_mtu, mpc->num_queues);
698 if (err) {
699 netdev_err(ndev, "Insufficient memory for new MTU\n");
700 return err;
701 }
702
703 err = mana_detach(ndev, false);
704 if (err) {
705 netdev_err(ndev, "mana_detach failed: %d\n", err);
706 goto out;
707 }
708
709 WRITE_ONCE(ndev->mtu, new_mtu);
710
711 err = mana_attach(ndev);
712 if (err) {
713 netdev_err(ndev, "mana_attach failed: %d\n", err);
714 WRITE_ONCE(ndev->mtu, old_mtu);
715 }
716
717 out:
718 mana_pre_dealloc_rxbufs(mpc);
719 return err;
720 }
721
722 static const struct net_device_ops mana_devops = {
723 .ndo_open = mana_open,
724 .ndo_stop = mana_close,
725 .ndo_select_queue = mana_select_queue,
726 .ndo_start_xmit = mana_start_xmit,
727 .ndo_validate_addr = eth_validate_addr,
728 .ndo_get_stats64 = mana_get_stats64,
729 .ndo_bpf = mana_bpf,
730 .ndo_xdp_xmit = mana_xdp_xmit,
731 .ndo_change_mtu = mana_change_mtu,
732 };
733
mana_cleanup_port_context(struct mana_port_context * apc)734 static void mana_cleanup_port_context(struct mana_port_context *apc)
735 {
736 /*
737 * make sure subsequent cleanup attempts don't end up removing already
738 * cleaned dentry pointer
739 */
740 debugfs_remove(apc->mana_port_debugfs);
741 apc->mana_port_debugfs = NULL;
742 kfree(apc->rxqs);
743 apc->rxqs = NULL;
744 }
745
mana_cleanup_indir_table(struct mana_port_context * apc)746 static void mana_cleanup_indir_table(struct mana_port_context *apc)
747 {
748 apc->indir_table_sz = 0;
749 kfree(apc->indir_table);
750 kfree(apc->rxobj_table);
751 }
752
mana_init_port_context(struct mana_port_context * apc)753 static int mana_init_port_context(struct mana_port_context *apc)
754 {
755 apc->rxqs = kcalloc(apc->num_queues, sizeof(struct mana_rxq *),
756 GFP_KERNEL);
757
758 return !apc->rxqs ? -ENOMEM : 0;
759 }
760
mana_send_request(struct mana_context * ac,void * in_buf,u32 in_len,void * out_buf,u32 out_len)761 static int mana_send_request(struct mana_context *ac, void *in_buf,
762 u32 in_len, void *out_buf, u32 out_len)
763 {
764 struct gdma_context *gc = ac->gdma_dev->gdma_context;
765 struct gdma_resp_hdr *resp = out_buf;
766 struct gdma_req_hdr *req = in_buf;
767 struct device *dev = gc->dev;
768 static atomic_t activity_id;
769 int err;
770
771 req->dev_id = gc->mana.dev_id;
772 req->activity_id = atomic_inc_return(&activity_id);
773
774 err = mana_gd_send_request(gc, in_len, in_buf, out_len,
775 out_buf);
776 if (err || resp->status) {
777 dev_err(dev, "Failed to send mana message: %d, 0x%x\n",
778 err, resp->status);
779 return err ? err : -EPROTO;
780 }
781
782 if (req->dev_id.as_uint32 != resp->dev_id.as_uint32 ||
783 req->activity_id != resp->activity_id) {
784 dev_err(dev, "Unexpected mana message response: %x,%x,%x,%x\n",
785 req->dev_id.as_uint32, resp->dev_id.as_uint32,
786 req->activity_id, resp->activity_id);
787 return -EPROTO;
788 }
789
790 return 0;
791 }
792
mana_verify_resp_hdr(const struct gdma_resp_hdr * resp_hdr,const enum mana_command_code expected_code,const u32 min_size)793 static int mana_verify_resp_hdr(const struct gdma_resp_hdr *resp_hdr,
794 const enum mana_command_code expected_code,
795 const u32 min_size)
796 {
797 if (resp_hdr->response.msg_type != expected_code)
798 return -EPROTO;
799
800 if (resp_hdr->response.msg_version < GDMA_MESSAGE_V1)
801 return -EPROTO;
802
803 if (resp_hdr->response.msg_size < min_size)
804 return -EPROTO;
805
806 return 0;
807 }
808
mana_pf_register_hw_vport(struct mana_port_context * apc)809 static int mana_pf_register_hw_vport(struct mana_port_context *apc)
810 {
811 struct mana_register_hw_vport_resp resp = {};
812 struct mana_register_hw_vport_req req = {};
813 int err;
814
815 mana_gd_init_req_hdr(&req.hdr, MANA_REGISTER_HW_PORT,
816 sizeof(req), sizeof(resp));
817 req.attached_gfid = 1;
818 req.is_pf_default_vport = 1;
819 req.allow_all_ether_types = 1;
820
821 err = mana_send_request(apc->ac, &req, sizeof(req), &resp,
822 sizeof(resp));
823 if (err) {
824 netdev_err(apc->ndev, "Failed to register hw vPort: %d\n", err);
825 return err;
826 }
827
828 err = mana_verify_resp_hdr(&resp.hdr, MANA_REGISTER_HW_PORT,
829 sizeof(resp));
830 if (err || resp.hdr.status) {
831 netdev_err(apc->ndev, "Failed to register hw vPort: %d, 0x%x\n",
832 err, resp.hdr.status);
833 return err ? err : -EPROTO;
834 }
835
836 apc->port_handle = resp.hw_vport_handle;
837 return 0;
838 }
839
mana_pf_deregister_hw_vport(struct mana_port_context * apc)840 static void mana_pf_deregister_hw_vport(struct mana_port_context *apc)
841 {
842 struct mana_deregister_hw_vport_resp resp = {};
843 struct mana_deregister_hw_vport_req req = {};
844 int err;
845
846 mana_gd_init_req_hdr(&req.hdr, MANA_DEREGISTER_HW_PORT,
847 sizeof(req), sizeof(resp));
848 req.hw_vport_handle = apc->port_handle;
849
850 err = mana_send_request(apc->ac, &req, sizeof(req), &resp,
851 sizeof(resp));
852 if (err) {
853 netdev_err(apc->ndev, "Failed to unregister hw vPort: %d\n",
854 err);
855 return;
856 }
857
858 err = mana_verify_resp_hdr(&resp.hdr, MANA_DEREGISTER_HW_PORT,
859 sizeof(resp));
860 if (err || resp.hdr.status)
861 netdev_err(apc->ndev,
862 "Failed to deregister hw vPort: %d, 0x%x\n",
863 err, resp.hdr.status);
864 }
865
mana_pf_register_filter(struct mana_port_context * apc)866 static int mana_pf_register_filter(struct mana_port_context *apc)
867 {
868 struct mana_register_filter_resp resp = {};
869 struct mana_register_filter_req req = {};
870 int err;
871
872 mana_gd_init_req_hdr(&req.hdr, MANA_REGISTER_FILTER,
873 sizeof(req), sizeof(resp));
874 req.vport = apc->port_handle;
875 memcpy(req.mac_addr, apc->mac_addr, ETH_ALEN);
876
877 err = mana_send_request(apc->ac, &req, sizeof(req), &resp,
878 sizeof(resp));
879 if (err) {
880 netdev_err(apc->ndev, "Failed to register filter: %d\n", err);
881 return err;
882 }
883
884 err = mana_verify_resp_hdr(&resp.hdr, MANA_REGISTER_FILTER,
885 sizeof(resp));
886 if (err || resp.hdr.status) {
887 netdev_err(apc->ndev, "Failed to register filter: %d, 0x%x\n",
888 err, resp.hdr.status);
889 return err ? err : -EPROTO;
890 }
891
892 apc->pf_filter_handle = resp.filter_handle;
893 return 0;
894 }
895
mana_pf_deregister_filter(struct mana_port_context * apc)896 static void mana_pf_deregister_filter(struct mana_port_context *apc)
897 {
898 struct mana_deregister_filter_resp resp = {};
899 struct mana_deregister_filter_req req = {};
900 int err;
901
902 mana_gd_init_req_hdr(&req.hdr, MANA_DEREGISTER_FILTER,
903 sizeof(req), sizeof(resp));
904 req.filter_handle = apc->pf_filter_handle;
905
906 err = mana_send_request(apc->ac, &req, sizeof(req), &resp,
907 sizeof(resp));
908 if (err) {
909 netdev_err(apc->ndev, "Failed to unregister filter: %d\n",
910 err);
911 return;
912 }
913
914 err = mana_verify_resp_hdr(&resp.hdr, MANA_DEREGISTER_FILTER,
915 sizeof(resp));
916 if (err || resp.hdr.status)
917 netdev_err(apc->ndev,
918 "Failed to deregister filter: %d, 0x%x\n",
919 err, resp.hdr.status);
920 }
921
mana_query_device_cfg(struct mana_context * ac,u32 proto_major_ver,u32 proto_minor_ver,u32 proto_micro_ver,u16 * max_num_vports)922 static int mana_query_device_cfg(struct mana_context *ac, u32 proto_major_ver,
923 u32 proto_minor_ver, u32 proto_micro_ver,
924 u16 *max_num_vports)
925 {
926 struct gdma_context *gc = ac->gdma_dev->gdma_context;
927 struct mana_query_device_cfg_resp resp = {};
928 struct mana_query_device_cfg_req req = {};
929 struct device *dev = gc->dev;
930 int err = 0;
931
932 mana_gd_init_req_hdr(&req.hdr, MANA_QUERY_DEV_CONFIG,
933 sizeof(req), sizeof(resp));
934
935 req.hdr.resp.msg_version = GDMA_MESSAGE_V2;
936
937 req.proto_major_ver = proto_major_ver;
938 req.proto_minor_ver = proto_minor_ver;
939 req.proto_micro_ver = proto_micro_ver;
940
941 err = mana_send_request(ac, &req, sizeof(req), &resp, sizeof(resp));
942 if (err) {
943 dev_err(dev, "Failed to query config: %d", err);
944 return err;
945 }
946
947 err = mana_verify_resp_hdr(&resp.hdr, MANA_QUERY_DEV_CONFIG,
948 sizeof(resp));
949 if (err || resp.hdr.status) {
950 dev_err(dev, "Invalid query result: %d, 0x%x\n", err,
951 resp.hdr.status);
952 if (!err)
953 err = -EPROTO;
954 return err;
955 }
956
957 *max_num_vports = resp.max_num_vports;
958
959 if (resp.hdr.response.msg_version == GDMA_MESSAGE_V2)
960 gc->adapter_mtu = resp.adapter_mtu;
961 else
962 gc->adapter_mtu = ETH_FRAME_LEN;
963
964 debugfs_create_u16("adapter-MTU", 0400, gc->mana_pci_debugfs, &gc->adapter_mtu);
965
966 return 0;
967 }
968
mana_query_vport_cfg(struct mana_port_context * apc,u32 vport_index,u32 * max_sq,u32 * max_rq,u32 * num_indir_entry)969 static int mana_query_vport_cfg(struct mana_port_context *apc, u32 vport_index,
970 u32 *max_sq, u32 *max_rq, u32 *num_indir_entry)
971 {
972 struct mana_query_vport_cfg_resp resp = {};
973 struct mana_query_vport_cfg_req req = {};
974 int err;
975
976 mana_gd_init_req_hdr(&req.hdr, MANA_QUERY_VPORT_CONFIG,
977 sizeof(req), sizeof(resp));
978
979 req.vport_index = vport_index;
980
981 err = mana_send_request(apc->ac, &req, sizeof(req), &resp,
982 sizeof(resp));
983 if (err)
984 return err;
985
986 err = mana_verify_resp_hdr(&resp.hdr, MANA_QUERY_VPORT_CONFIG,
987 sizeof(resp));
988 if (err)
989 return err;
990
991 if (resp.hdr.status)
992 return -EPROTO;
993
994 *max_sq = resp.max_num_sq;
995 *max_rq = resp.max_num_rq;
996 if (resp.num_indirection_ent > 0 &&
997 resp.num_indirection_ent <= MANA_INDIRECT_TABLE_MAX_SIZE &&
998 is_power_of_2(resp.num_indirection_ent)) {
999 *num_indir_entry = resp.num_indirection_ent;
1000 } else {
1001 netdev_warn(apc->ndev,
1002 "Setting indirection table size to default %d for vPort %d\n",
1003 MANA_INDIRECT_TABLE_DEF_SIZE, apc->port_idx);
1004 *num_indir_entry = MANA_INDIRECT_TABLE_DEF_SIZE;
1005 }
1006
1007 apc->port_handle = resp.vport;
1008 ether_addr_copy(apc->mac_addr, resp.mac_addr);
1009
1010 return 0;
1011 }
1012
mana_uncfg_vport(struct mana_port_context * apc)1013 void mana_uncfg_vport(struct mana_port_context *apc)
1014 {
1015 mutex_lock(&apc->vport_mutex);
1016 apc->vport_use_count--;
1017 WARN_ON(apc->vport_use_count < 0);
1018 mutex_unlock(&apc->vport_mutex);
1019 }
1020 EXPORT_SYMBOL_NS(mana_uncfg_vport, "NET_MANA");
1021
mana_cfg_vport(struct mana_port_context * apc,u32 protection_dom_id,u32 doorbell_pg_id)1022 int mana_cfg_vport(struct mana_port_context *apc, u32 protection_dom_id,
1023 u32 doorbell_pg_id)
1024 {
1025 struct mana_config_vport_resp resp = {};
1026 struct mana_config_vport_req req = {};
1027 int err;
1028
1029 /* This function is used to program the Ethernet port in the hardware
1030 * table. It can be called from the Ethernet driver or the RDMA driver.
1031 *
1032 * For Ethernet usage, the hardware supports only one active user on a
1033 * physical port. The driver checks on the port usage before programming
1034 * the hardware when creating the RAW QP (RDMA driver) or exposing the
1035 * device to kernel NET layer (Ethernet driver).
1036 *
1037 * Because the RDMA driver doesn't know in advance which QP type the
1038 * user will create, it exposes the device with all its ports. The user
1039 * may not be able to create RAW QP on a port if this port is already
1040 * in used by the Ethernet driver from the kernel.
1041 *
1042 * This physical port limitation only applies to the RAW QP. For RC QP,
1043 * the hardware doesn't have this limitation. The user can create RC
1044 * QPs on a physical port up to the hardware limits independent of the
1045 * Ethernet usage on the same port.
1046 */
1047 mutex_lock(&apc->vport_mutex);
1048 if (apc->vport_use_count > 0) {
1049 mutex_unlock(&apc->vport_mutex);
1050 return -EBUSY;
1051 }
1052 apc->vport_use_count++;
1053 mutex_unlock(&apc->vport_mutex);
1054
1055 mana_gd_init_req_hdr(&req.hdr, MANA_CONFIG_VPORT_TX,
1056 sizeof(req), sizeof(resp));
1057 req.vport = apc->port_handle;
1058 req.pdid = protection_dom_id;
1059 req.doorbell_pageid = doorbell_pg_id;
1060
1061 err = mana_send_request(apc->ac, &req, sizeof(req), &resp,
1062 sizeof(resp));
1063 if (err) {
1064 netdev_err(apc->ndev, "Failed to configure vPort: %d\n", err);
1065 goto out;
1066 }
1067
1068 err = mana_verify_resp_hdr(&resp.hdr, MANA_CONFIG_VPORT_TX,
1069 sizeof(resp));
1070 if (err || resp.hdr.status) {
1071 netdev_err(apc->ndev, "Failed to configure vPort: %d, 0x%x\n",
1072 err, resp.hdr.status);
1073 if (!err)
1074 err = -EPROTO;
1075
1076 goto out;
1077 }
1078
1079 apc->tx_shortform_allowed = resp.short_form_allowed;
1080 apc->tx_vp_offset = resp.tx_vport_offset;
1081
1082 netdev_info(apc->ndev, "Configured vPort %llu PD %u DB %u\n",
1083 apc->port_handle, protection_dom_id, doorbell_pg_id);
1084 out:
1085 if (err)
1086 mana_uncfg_vport(apc);
1087
1088 return err;
1089 }
1090 EXPORT_SYMBOL_NS(mana_cfg_vport, "NET_MANA");
1091
mana_cfg_vport_steering(struct mana_port_context * apc,enum TRI_STATE rx,bool update_default_rxobj,bool update_key,bool update_tab)1092 static int mana_cfg_vport_steering(struct mana_port_context *apc,
1093 enum TRI_STATE rx,
1094 bool update_default_rxobj, bool update_key,
1095 bool update_tab)
1096 {
1097 struct mana_cfg_rx_steer_req_v2 *req;
1098 struct mana_cfg_rx_steer_resp resp = {};
1099 struct net_device *ndev = apc->ndev;
1100 u32 req_buf_size;
1101 int err;
1102
1103 req_buf_size = struct_size(req, indir_tab, apc->indir_table_sz);
1104 req = kzalloc(req_buf_size, GFP_KERNEL);
1105 if (!req)
1106 return -ENOMEM;
1107
1108 mana_gd_init_req_hdr(&req->hdr, MANA_CONFIG_VPORT_RX, req_buf_size,
1109 sizeof(resp));
1110
1111 req->hdr.req.msg_version = GDMA_MESSAGE_V2;
1112
1113 req->vport = apc->port_handle;
1114 req->num_indir_entries = apc->indir_table_sz;
1115 req->indir_tab_offset = offsetof(struct mana_cfg_rx_steer_req_v2,
1116 indir_tab);
1117 req->rx_enable = rx;
1118 req->rss_enable = apc->rss_state;
1119 req->update_default_rxobj = update_default_rxobj;
1120 req->update_hashkey = update_key;
1121 req->update_indir_tab = update_tab;
1122 req->default_rxobj = apc->default_rxobj;
1123 req->cqe_coalescing_enable = 0;
1124
1125 if (update_key)
1126 memcpy(&req->hashkey, apc->hashkey, MANA_HASH_KEY_SIZE);
1127
1128 if (update_tab)
1129 memcpy(req->indir_tab, apc->rxobj_table,
1130 flex_array_size(req, indir_tab, req->num_indir_entries));
1131
1132 err = mana_send_request(apc->ac, req, req_buf_size, &resp,
1133 sizeof(resp));
1134 if (err) {
1135 netdev_err(ndev, "Failed to configure vPort RX: %d\n", err);
1136 goto out;
1137 }
1138
1139 err = mana_verify_resp_hdr(&resp.hdr, MANA_CONFIG_VPORT_RX,
1140 sizeof(resp));
1141 if (err) {
1142 netdev_err(ndev, "vPort RX configuration failed: %d\n", err);
1143 goto out;
1144 }
1145
1146 if (resp.hdr.status) {
1147 netdev_err(ndev, "vPort RX configuration failed: 0x%x\n",
1148 resp.hdr.status);
1149 err = -EPROTO;
1150 }
1151
1152 netdev_info(ndev, "Configured steering vPort %llu entries %u\n",
1153 apc->port_handle, apc->indir_table_sz);
1154 out:
1155 kfree(req);
1156 return err;
1157 }
1158
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)1159 int mana_create_wq_obj(struct mana_port_context *apc,
1160 mana_handle_t vport,
1161 u32 wq_type, struct mana_obj_spec *wq_spec,
1162 struct mana_obj_spec *cq_spec,
1163 mana_handle_t *wq_obj)
1164 {
1165 struct mana_create_wqobj_resp resp = {};
1166 struct mana_create_wqobj_req req = {};
1167 struct net_device *ndev = apc->ndev;
1168 int err;
1169
1170 mana_gd_init_req_hdr(&req.hdr, MANA_CREATE_WQ_OBJ,
1171 sizeof(req), sizeof(resp));
1172 req.vport = vport;
1173 req.wq_type = wq_type;
1174 req.wq_gdma_region = wq_spec->gdma_region;
1175 req.cq_gdma_region = cq_spec->gdma_region;
1176 req.wq_size = wq_spec->queue_size;
1177 req.cq_size = cq_spec->queue_size;
1178 req.cq_moderation_ctx_id = cq_spec->modr_ctx_id;
1179 req.cq_parent_qid = cq_spec->attached_eq;
1180
1181 err = mana_send_request(apc->ac, &req, sizeof(req), &resp,
1182 sizeof(resp));
1183 if (err) {
1184 netdev_err(ndev, "Failed to create WQ object: %d\n", err);
1185 goto out;
1186 }
1187
1188 err = mana_verify_resp_hdr(&resp.hdr, MANA_CREATE_WQ_OBJ,
1189 sizeof(resp));
1190 if (err || resp.hdr.status) {
1191 netdev_err(ndev, "Failed to create WQ object: %d, 0x%x\n", err,
1192 resp.hdr.status);
1193 if (!err)
1194 err = -EPROTO;
1195 goto out;
1196 }
1197
1198 if (resp.wq_obj == INVALID_MANA_HANDLE) {
1199 netdev_err(ndev, "Got an invalid WQ object handle\n");
1200 err = -EPROTO;
1201 goto out;
1202 }
1203
1204 *wq_obj = resp.wq_obj;
1205 wq_spec->queue_index = resp.wq_id;
1206 cq_spec->queue_index = resp.cq_id;
1207
1208 return 0;
1209 out:
1210 return err;
1211 }
1212 EXPORT_SYMBOL_NS(mana_create_wq_obj, "NET_MANA");
1213
mana_destroy_wq_obj(struct mana_port_context * apc,u32 wq_type,mana_handle_t wq_obj)1214 void mana_destroy_wq_obj(struct mana_port_context *apc, u32 wq_type,
1215 mana_handle_t wq_obj)
1216 {
1217 struct mana_destroy_wqobj_resp resp = {};
1218 struct mana_destroy_wqobj_req req = {};
1219 struct net_device *ndev = apc->ndev;
1220 int err;
1221
1222 mana_gd_init_req_hdr(&req.hdr, MANA_DESTROY_WQ_OBJ,
1223 sizeof(req), sizeof(resp));
1224 req.wq_type = wq_type;
1225 req.wq_obj_handle = wq_obj;
1226
1227 err = mana_send_request(apc->ac, &req, sizeof(req), &resp,
1228 sizeof(resp));
1229 if (err) {
1230 netdev_err(ndev, "Failed to destroy WQ object: %d\n", err);
1231 return;
1232 }
1233
1234 err = mana_verify_resp_hdr(&resp.hdr, MANA_DESTROY_WQ_OBJ,
1235 sizeof(resp));
1236 if (err || resp.hdr.status)
1237 netdev_err(ndev, "Failed to destroy WQ object: %d, 0x%x\n", err,
1238 resp.hdr.status);
1239 }
1240 EXPORT_SYMBOL_NS(mana_destroy_wq_obj, "NET_MANA");
1241
mana_destroy_eq(struct mana_context * ac)1242 static void mana_destroy_eq(struct mana_context *ac)
1243 {
1244 struct gdma_context *gc = ac->gdma_dev->gdma_context;
1245 struct gdma_queue *eq;
1246 int i;
1247
1248 if (!ac->eqs)
1249 return;
1250
1251 debugfs_remove_recursive(ac->mana_eqs_debugfs);
1252 ac->mana_eqs_debugfs = NULL;
1253
1254 for (i = 0; i < gc->max_num_queues; i++) {
1255 eq = ac->eqs[i].eq;
1256 if (!eq)
1257 continue;
1258
1259 mana_gd_destroy_queue(gc, eq);
1260 }
1261
1262 kfree(ac->eqs);
1263 ac->eqs = NULL;
1264 }
1265
mana_create_eq_debugfs(struct mana_context * ac,int i)1266 static void mana_create_eq_debugfs(struct mana_context *ac, int i)
1267 {
1268 struct mana_eq eq = ac->eqs[i];
1269 char eqnum[32];
1270
1271 sprintf(eqnum, "eq%d", i);
1272 eq.mana_eq_debugfs = debugfs_create_dir(eqnum, ac->mana_eqs_debugfs);
1273 debugfs_create_u32("head", 0400, eq.mana_eq_debugfs, &eq.eq->head);
1274 debugfs_create_u32("tail", 0400, eq.mana_eq_debugfs, &eq.eq->tail);
1275 debugfs_create_file("eq_dump", 0400, eq.mana_eq_debugfs, eq.eq, &mana_dbg_q_fops);
1276 }
1277
mana_create_eq(struct mana_context * ac)1278 static int mana_create_eq(struct mana_context *ac)
1279 {
1280 struct gdma_dev *gd = ac->gdma_dev;
1281 struct gdma_context *gc = gd->gdma_context;
1282 struct gdma_queue_spec spec = {};
1283 int err;
1284 int i;
1285
1286 ac->eqs = kcalloc(gc->max_num_queues, sizeof(struct mana_eq),
1287 GFP_KERNEL);
1288 if (!ac->eqs)
1289 return -ENOMEM;
1290
1291 spec.type = GDMA_EQ;
1292 spec.monitor_avl_buf = false;
1293 spec.queue_size = EQ_SIZE;
1294 spec.eq.callback = NULL;
1295 spec.eq.context = ac->eqs;
1296 spec.eq.log2_throttle_limit = LOG2_EQ_THROTTLE;
1297
1298 ac->mana_eqs_debugfs = debugfs_create_dir("EQs", gc->mana_pci_debugfs);
1299
1300 for (i = 0; i < gc->max_num_queues; i++) {
1301 spec.eq.msix_index = (i + 1) % gc->num_msix_usable;
1302 err = mana_gd_create_mana_eq(gd, &spec, &ac->eqs[i].eq);
1303 if (err) {
1304 dev_err(gc->dev, "Failed to create EQ %d : %d\n", i, err);
1305 goto out;
1306 }
1307 mana_create_eq_debugfs(ac, i);
1308 }
1309
1310 return 0;
1311 out:
1312 mana_destroy_eq(ac);
1313 return err;
1314 }
1315
mana_fence_rq(struct mana_port_context * apc,struct mana_rxq * rxq)1316 static int mana_fence_rq(struct mana_port_context *apc, struct mana_rxq *rxq)
1317 {
1318 struct mana_fence_rq_resp resp = {};
1319 struct mana_fence_rq_req req = {};
1320 int err;
1321
1322 init_completion(&rxq->fence_event);
1323
1324 mana_gd_init_req_hdr(&req.hdr, MANA_FENCE_RQ,
1325 sizeof(req), sizeof(resp));
1326 req.wq_obj_handle = rxq->rxobj;
1327
1328 err = mana_send_request(apc->ac, &req, sizeof(req), &resp,
1329 sizeof(resp));
1330 if (err) {
1331 netdev_err(apc->ndev, "Failed to fence RQ %u: %d\n",
1332 rxq->rxq_idx, err);
1333 return err;
1334 }
1335
1336 err = mana_verify_resp_hdr(&resp.hdr, MANA_FENCE_RQ, sizeof(resp));
1337 if (err || resp.hdr.status) {
1338 netdev_err(apc->ndev, "Failed to fence RQ %u: %d, 0x%x\n",
1339 rxq->rxq_idx, err, resp.hdr.status);
1340 if (!err)
1341 err = -EPROTO;
1342
1343 return err;
1344 }
1345
1346 if (wait_for_completion_timeout(&rxq->fence_event, 10 * HZ) == 0) {
1347 netdev_err(apc->ndev, "Failed to fence RQ %u: timed out\n",
1348 rxq->rxq_idx);
1349 return -ETIMEDOUT;
1350 }
1351
1352 return 0;
1353 }
1354
mana_fence_rqs(struct mana_port_context * apc)1355 static void mana_fence_rqs(struct mana_port_context *apc)
1356 {
1357 unsigned int rxq_idx;
1358 struct mana_rxq *rxq;
1359 int err;
1360
1361 for (rxq_idx = 0; rxq_idx < apc->num_queues; rxq_idx++) {
1362 rxq = apc->rxqs[rxq_idx];
1363 err = mana_fence_rq(apc, rxq);
1364
1365 /* In case of any error, use sleep instead. */
1366 if (err)
1367 msleep(100);
1368 }
1369 }
1370
mana_move_wq_tail(struct gdma_queue * wq,u32 num_units)1371 static int mana_move_wq_tail(struct gdma_queue *wq, u32 num_units)
1372 {
1373 u32 used_space_old;
1374 u32 used_space_new;
1375
1376 used_space_old = wq->head - wq->tail;
1377 used_space_new = wq->head - (wq->tail + num_units);
1378
1379 if (WARN_ON_ONCE(used_space_new > used_space_old))
1380 return -ERANGE;
1381
1382 wq->tail += num_units;
1383 return 0;
1384 }
1385
mana_unmap_skb(struct sk_buff * skb,struct mana_port_context * apc)1386 static void mana_unmap_skb(struct sk_buff *skb, struct mana_port_context *apc)
1387 {
1388 struct mana_skb_head *ash = (struct mana_skb_head *)skb->head;
1389 struct gdma_context *gc = apc->ac->gdma_dev->gdma_context;
1390 struct device *dev = gc->dev;
1391 int hsg, i;
1392
1393 /* Number of SGEs of linear part */
1394 hsg = (skb_is_gso(skb) && skb_headlen(skb) > ash->size[0]) ? 2 : 1;
1395
1396 for (i = 0; i < hsg; i++)
1397 dma_unmap_single(dev, ash->dma_handle[i], ash->size[i],
1398 DMA_TO_DEVICE);
1399
1400 for (i = hsg; i < skb_shinfo(skb)->nr_frags + hsg; i++)
1401 dma_unmap_page(dev, ash->dma_handle[i], ash->size[i],
1402 DMA_TO_DEVICE);
1403 }
1404
mana_poll_tx_cq(struct mana_cq * cq)1405 static void mana_poll_tx_cq(struct mana_cq *cq)
1406 {
1407 struct gdma_comp *completions = cq->gdma_comp_buf;
1408 struct gdma_posted_wqe_info *wqe_info;
1409 unsigned int pkt_transmitted = 0;
1410 unsigned int wqe_unit_cnt = 0;
1411 struct mana_txq *txq = cq->txq;
1412 struct mana_port_context *apc;
1413 struct netdev_queue *net_txq;
1414 struct gdma_queue *gdma_wq;
1415 unsigned int avail_space;
1416 struct net_device *ndev;
1417 struct sk_buff *skb;
1418 bool txq_stopped;
1419 int comp_read;
1420 int i;
1421
1422 ndev = txq->ndev;
1423 apc = netdev_priv(ndev);
1424
1425 comp_read = mana_gd_poll_cq(cq->gdma_cq, completions,
1426 CQE_POLLING_BUFFER);
1427
1428 if (comp_read < 1)
1429 return;
1430
1431 for (i = 0; i < comp_read; i++) {
1432 struct mana_tx_comp_oob *cqe_oob;
1433
1434 if (WARN_ON_ONCE(!completions[i].is_sq))
1435 return;
1436
1437 cqe_oob = (struct mana_tx_comp_oob *)completions[i].cqe_data;
1438 if (WARN_ON_ONCE(cqe_oob->cqe_hdr.client_type !=
1439 MANA_CQE_COMPLETION))
1440 return;
1441
1442 switch (cqe_oob->cqe_hdr.cqe_type) {
1443 case CQE_TX_OKAY:
1444 break;
1445
1446 case CQE_TX_SA_DROP:
1447 case CQE_TX_MTU_DROP:
1448 case CQE_TX_INVALID_OOB:
1449 case CQE_TX_INVALID_ETH_TYPE:
1450 case CQE_TX_HDR_PROCESSING_ERROR:
1451 case CQE_TX_VF_DISABLED:
1452 case CQE_TX_VPORT_IDX_OUT_OF_RANGE:
1453 case CQE_TX_VPORT_DISABLED:
1454 case CQE_TX_VLAN_TAGGING_VIOLATION:
1455 if (net_ratelimit())
1456 netdev_err(ndev, "TX: CQE error %d\n",
1457 cqe_oob->cqe_hdr.cqe_type);
1458
1459 apc->eth_stats.tx_cqe_err++;
1460 break;
1461
1462 default:
1463 /* If the CQE type is unknown, log an error,
1464 * and still free the SKB, update tail, etc.
1465 */
1466 if (net_ratelimit())
1467 netdev_err(ndev, "TX: unknown CQE type %d\n",
1468 cqe_oob->cqe_hdr.cqe_type);
1469
1470 apc->eth_stats.tx_cqe_unknown_type++;
1471 break;
1472 }
1473
1474 if (WARN_ON_ONCE(txq->gdma_txq_id != completions[i].wq_num))
1475 return;
1476
1477 skb = skb_dequeue(&txq->pending_skbs);
1478 if (WARN_ON_ONCE(!skb))
1479 return;
1480
1481 wqe_info = (struct gdma_posted_wqe_info *)skb->cb;
1482 wqe_unit_cnt += wqe_info->wqe_size_in_bu;
1483
1484 mana_unmap_skb(skb, apc);
1485
1486 napi_consume_skb(skb, cq->budget);
1487
1488 pkt_transmitted++;
1489 }
1490
1491 if (WARN_ON_ONCE(wqe_unit_cnt == 0))
1492 return;
1493
1494 mana_move_wq_tail(txq->gdma_sq, wqe_unit_cnt);
1495
1496 gdma_wq = txq->gdma_sq;
1497 avail_space = mana_gd_wq_avail_space(gdma_wq);
1498
1499 /* Ensure tail updated before checking q stop */
1500 smp_mb();
1501
1502 net_txq = txq->net_txq;
1503 txq_stopped = netif_tx_queue_stopped(net_txq);
1504
1505 /* Ensure checking txq_stopped before apc->port_is_up. */
1506 smp_rmb();
1507
1508 if (txq_stopped && apc->port_is_up && avail_space >= MAX_TX_WQE_SIZE) {
1509 netif_tx_wake_queue(net_txq);
1510 apc->eth_stats.wake_queue++;
1511 }
1512
1513 if (atomic_sub_return(pkt_transmitted, &txq->pending_sends) < 0)
1514 WARN_ON_ONCE(1);
1515
1516 cq->work_done = pkt_transmitted;
1517 }
1518
mana_post_pkt_rxq(struct mana_rxq * rxq)1519 static void mana_post_pkt_rxq(struct mana_rxq *rxq)
1520 {
1521 struct mana_recv_buf_oob *recv_buf_oob;
1522 u32 curr_index;
1523 int err;
1524
1525 curr_index = rxq->buf_index++;
1526 if (rxq->buf_index == rxq->num_rx_buf)
1527 rxq->buf_index = 0;
1528
1529 recv_buf_oob = &rxq->rx_oobs[curr_index];
1530
1531 err = mana_gd_post_work_request(rxq->gdma_rq, &recv_buf_oob->wqe_req,
1532 &recv_buf_oob->wqe_inf);
1533 if (WARN_ON_ONCE(err))
1534 return;
1535
1536 WARN_ON_ONCE(recv_buf_oob->wqe_inf.wqe_size_in_bu != 1);
1537 }
1538
mana_build_skb(struct mana_rxq * rxq,void * buf_va,uint pkt_len,struct xdp_buff * xdp)1539 static struct sk_buff *mana_build_skb(struct mana_rxq *rxq, void *buf_va,
1540 uint pkt_len, struct xdp_buff *xdp)
1541 {
1542 struct sk_buff *skb = napi_build_skb(buf_va, rxq->alloc_size);
1543
1544 if (!skb)
1545 return NULL;
1546
1547 if (xdp->data_hard_start) {
1548 u32 metasize = xdp->data - xdp->data_meta;
1549
1550 skb_reserve(skb, xdp->data - xdp->data_hard_start);
1551 skb_put(skb, xdp->data_end - xdp->data);
1552 if (metasize)
1553 skb_metadata_set(skb, metasize);
1554 return skb;
1555 }
1556
1557 skb_reserve(skb, rxq->headroom);
1558 skb_put(skb, pkt_len);
1559
1560 return skb;
1561 }
1562
mana_rx_skb(void * buf_va,bool from_pool,struct mana_rxcomp_oob * cqe,struct mana_rxq * rxq)1563 static void mana_rx_skb(void *buf_va, bool from_pool,
1564 struct mana_rxcomp_oob *cqe, struct mana_rxq *rxq)
1565 {
1566 struct mana_stats_rx *rx_stats = &rxq->stats;
1567 struct net_device *ndev = rxq->ndev;
1568 uint pkt_len = cqe->ppi[0].pkt_len;
1569 u16 rxq_idx = rxq->rxq_idx;
1570 struct napi_struct *napi;
1571 struct xdp_buff xdp = {};
1572 struct sk_buff *skb;
1573 u32 hash_value;
1574 u32 act;
1575
1576 rxq->rx_cq.work_done++;
1577 napi = &rxq->rx_cq.napi;
1578
1579 if (!buf_va) {
1580 ++ndev->stats.rx_dropped;
1581 return;
1582 }
1583
1584 act = mana_run_xdp(ndev, rxq, &xdp, buf_va, pkt_len);
1585
1586 if (act == XDP_REDIRECT && !rxq->xdp_rc)
1587 return;
1588
1589 if (act != XDP_PASS && act != XDP_TX)
1590 goto drop_xdp;
1591
1592 skb = mana_build_skb(rxq, buf_va, pkt_len, &xdp);
1593
1594 if (!skb)
1595 goto drop;
1596
1597 if (from_pool)
1598 skb_mark_for_recycle(skb);
1599
1600 skb->dev = napi->dev;
1601
1602 skb->protocol = eth_type_trans(skb, ndev);
1603 skb_checksum_none_assert(skb);
1604 skb_record_rx_queue(skb, rxq_idx);
1605
1606 if ((ndev->features & NETIF_F_RXCSUM) && cqe->rx_iphdr_csum_succeed) {
1607 if (cqe->rx_tcp_csum_succeed || cqe->rx_udp_csum_succeed)
1608 skb->ip_summed = CHECKSUM_UNNECESSARY;
1609 }
1610
1611 if (cqe->rx_hashtype != 0 && (ndev->features & NETIF_F_RXHASH)) {
1612 hash_value = cqe->ppi[0].pkt_hash;
1613
1614 if (cqe->rx_hashtype & MANA_HASH_L4)
1615 skb_set_hash(skb, hash_value, PKT_HASH_TYPE_L4);
1616 else
1617 skb_set_hash(skb, hash_value, PKT_HASH_TYPE_L3);
1618 }
1619
1620 if (cqe->rx_vlantag_present) {
1621 u16 vlan_tci = cqe->rx_vlan_id;
1622
1623 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vlan_tci);
1624 }
1625
1626 u64_stats_update_begin(&rx_stats->syncp);
1627 rx_stats->packets++;
1628 rx_stats->bytes += pkt_len;
1629
1630 if (act == XDP_TX)
1631 rx_stats->xdp_tx++;
1632 u64_stats_update_end(&rx_stats->syncp);
1633
1634 if (act == XDP_TX) {
1635 skb_set_queue_mapping(skb, rxq_idx);
1636 mana_xdp_tx(skb, ndev);
1637 return;
1638 }
1639
1640 napi_gro_receive(napi, skb);
1641
1642 return;
1643
1644 drop_xdp:
1645 u64_stats_update_begin(&rx_stats->syncp);
1646 rx_stats->xdp_drop++;
1647 u64_stats_update_end(&rx_stats->syncp);
1648
1649 drop:
1650 if (from_pool) {
1651 page_pool_recycle_direct(rxq->page_pool,
1652 virt_to_head_page(buf_va));
1653 } else {
1654 WARN_ON_ONCE(rxq->xdp_save_va);
1655 /* Save for reuse */
1656 rxq->xdp_save_va = buf_va;
1657 }
1658
1659 ++ndev->stats.rx_dropped;
1660
1661 return;
1662 }
1663
mana_get_rxfrag(struct mana_rxq * rxq,struct device * dev,dma_addr_t * da,bool * from_pool)1664 static void *mana_get_rxfrag(struct mana_rxq *rxq, struct device *dev,
1665 dma_addr_t *da, bool *from_pool)
1666 {
1667 struct page *page;
1668 void *va;
1669
1670 *from_pool = false;
1671
1672 /* Reuse XDP dropped page if available */
1673 if (rxq->xdp_save_va) {
1674 va = rxq->xdp_save_va;
1675 rxq->xdp_save_va = NULL;
1676 } else {
1677 page = page_pool_dev_alloc_pages(rxq->page_pool);
1678 if (!page)
1679 return NULL;
1680
1681 *from_pool = true;
1682 va = page_to_virt(page);
1683 }
1684
1685 *da = dma_map_single(dev, va + rxq->headroom, rxq->datasize,
1686 DMA_FROM_DEVICE);
1687 if (dma_mapping_error(dev, *da)) {
1688 if (*from_pool)
1689 page_pool_put_full_page(rxq->page_pool, page, false);
1690 else
1691 put_page(virt_to_head_page(va));
1692
1693 return NULL;
1694 }
1695
1696 return va;
1697 }
1698
1699 /* 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)1700 static void mana_refill_rx_oob(struct device *dev, struct mana_rxq *rxq,
1701 struct mana_recv_buf_oob *rxoob, void **old_buf,
1702 bool *old_fp)
1703 {
1704 bool from_pool;
1705 dma_addr_t da;
1706 void *va;
1707
1708 va = mana_get_rxfrag(rxq, dev, &da, &from_pool);
1709 if (!va)
1710 return;
1711
1712 dma_unmap_single(dev, rxoob->sgl[0].address, rxq->datasize,
1713 DMA_FROM_DEVICE);
1714 *old_buf = rxoob->buf_va;
1715 *old_fp = rxoob->from_pool;
1716
1717 rxoob->buf_va = va;
1718 rxoob->sgl[0].address = da;
1719 rxoob->from_pool = from_pool;
1720 }
1721
mana_process_rx_cqe(struct mana_rxq * rxq,struct mana_cq * cq,struct gdma_comp * cqe)1722 static void mana_process_rx_cqe(struct mana_rxq *rxq, struct mana_cq *cq,
1723 struct gdma_comp *cqe)
1724 {
1725 struct mana_rxcomp_oob *oob = (struct mana_rxcomp_oob *)cqe->cqe_data;
1726 struct gdma_context *gc = rxq->gdma_rq->gdma_dev->gdma_context;
1727 struct net_device *ndev = rxq->ndev;
1728 struct mana_recv_buf_oob *rxbuf_oob;
1729 struct mana_port_context *apc;
1730 struct device *dev = gc->dev;
1731 void *old_buf = NULL;
1732 u32 curr, pktlen;
1733 bool old_fp;
1734
1735 apc = netdev_priv(ndev);
1736
1737 switch (oob->cqe_hdr.cqe_type) {
1738 case CQE_RX_OKAY:
1739 break;
1740
1741 case CQE_RX_TRUNCATED:
1742 ++ndev->stats.rx_dropped;
1743 rxbuf_oob = &rxq->rx_oobs[rxq->buf_index];
1744 netdev_warn_once(ndev, "Dropped a truncated packet\n");
1745 goto drop;
1746
1747 case CQE_RX_COALESCED_4:
1748 netdev_err(ndev, "RX coalescing is unsupported\n");
1749 apc->eth_stats.rx_coalesced_err++;
1750 return;
1751
1752 case CQE_RX_OBJECT_FENCE:
1753 complete(&rxq->fence_event);
1754 return;
1755
1756 default:
1757 netdev_err(ndev, "Unknown RX CQE type = %d\n",
1758 oob->cqe_hdr.cqe_type);
1759 apc->eth_stats.rx_cqe_unknown_type++;
1760 return;
1761 }
1762
1763 pktlen = oob->ppi[0].pkt_len;
1764
1765 if (pktlen == 0) {
1766 /* data packets should never have packetlength of zero */
1767 netdev_err(ndev, "RX pkt len=0, rq=%u, cq=%u, rxobj=0x%llx\n",
1768 rxq->gdma_id, cq->gdma_id, rxq->rxobj);
1769 return;
1770 }
1771
1772 curr = rxq->buf_index;
1773 rxbuf_oob = &rxq->rx_oobs[curr];
1774 WARN_ON_ONCE(rxbuf_oob->wqe_inf.wqe_size_in_bu != 1);
1775
1776 mana_refill_rx_oob(dev, rxq, rxbuf_oob, &old_buf, &old_fp);
1777
1778 /* Unsuccessful refill will have old_buf == NULL.
1779 * In this case, mana_rx_skb() will drop the packet.
1780 */
1781 mana_rx_skb(old_buf, old_fp, oob, rxq);
1782
1783 drop:
1784 mana_move_wq_tail(rxq->gdma_rq, rxbuf_oob->wqe_inf.wqe_size_in_bu);
1785
1786 mana_post_pkt_rxq(rxq);
1787 }
1788
mana_poll_rx_cq(struct mana_cq * cq)1789 static void mana_poll_rx_cq(struct mana_cq *cq)
1790 {
1791 struct gdma_comp *comp = cq->gdma_comp_buf;
1792 struct mana_rxq *rxq = cq->rxq;
1793 int comp_read, i;
1794
1795 comp_read = mana_gd_poll_cq(cq->gdma_cq, comp, CQE_POLLING_BUFFER);
1796 WARN_ON_ONCE(comp_read > CQE_POLLING_BUFFER);
1797
1798 rxq->xdp_flush = false;
1799
1800 for (i = 0; i < comp_read; i++) {
1801 if (WARN_ON_ONCE(comp[i].is_sq))
1802 return;
1803
1804 /* verify recv cqe references the right rxq */
1805 if (WARN_ON_ONCE(comp[i].wq_num != cq->rxq->gdma_id))
1806 return;
1807
1808 mana_process_rx_cqe(rxq, cq, &comp[i]);
1809 }
1810
1811 if (comp_read > 0) {
1812 struct gdma_context *gc = rxq->gdma_rq->gdma_dev->gdma_context;
1813
1814 mana_gd_wq_ring_doorbell(gc, rxq->gdma_rq);
1815 }
1816
1817 if (rxq->xdp_flush)
1818 xdp_do_flush();
1819 }
1820
mana_cq_handler(void * context,struct gdma_queue * gdma_queue)1821 static int mana_cq_handler(void *context, struct gdma_queue *gdma_queue)
1822 {
1823 struct mana_cq *cq = context;
1824 int w;
1825
1826 WARN_ON_ONCE(cq->gdma_cq != gdma_queue);
1827
1828 if (cq->type == MANA_CQ_TYPE_RX)
1829 mana_poll_rx_cq(cq);
1830 else
1831 mana_poll_tx_cq(cq);
1832
1833 w = cq->work_done;
1834 cq->work_done_since_doorbell += w;
1835
1836 if (w < cq->budget) {
1837 mana_gd_ring_cq(gdma_queue, SET_ARM_BIT);
1838 cq->work_done_since_doorbell = 0;
1839 napi_complete_done(&cq->napi, w);
1840 } else if (cq->work_done_since_doorbell >
1841 cq->gdma_cq->queue_size / COMP_ENTRY_SIZE * 4) {
1842 /* MANA hardware requires at least one doorbell ring every 8
1843 * wraparounds of CQ even if there is no need to arm the CQ.
1844 * This driver rings the doorbell as soon as we have exceeded
1845 * 4 wraparounds.
1846 */
1847 mana_gd_ring_cq(gdma_queue, 0);
1848 cq->work_done_since_doorbell = 0;
1849 }
1850
1851 return w;
1852 }
1853
mana_poll(struct napi_struct * napi,int budget)1854 static int mana_poll(struct napi_struct *napi, int budget)
1855 {
1856 struct mana_cq *cq = container_of(napi, struct mana_cq, napi);
1857 int w;
1858
1859 cq->work_done = 0;
1860 cq->budget = budget;
1861
1862 w = mana_cq_handler(cq, cq->gdma_cq);
1863
1864 return min(w, budget);
1865 }
1866
mana_schedule_napi(void * context,struct gdma_queue * gdma_queue)1867 static void mana_schedule_napi(void *context, struct gdma_queue *gdma_queue)
1868 {
1869 struct mana_cq *cq = context;
1870
1871 napi_schedule_irqoff(&cq->napi);
1872 }
1873
mana_deinit_cq(struct mana_port_context * apc,struct mana_cq * cq)1874 static void mana_deinit_cq(struct mana_port_context *apc, struct mana_cq *cq)
1875 {
1876 struct gdma_dev *gd = apc->ac->gdma_dev;
1877
1878 if (!cq->gdma_cq)
1879 return;
1880
1881 mana_gd_destroy_queue(gd->gdma_context, cq->gdma_cq);
1882 }
1883
mana_deinit_txq(struct mana_port_context * apc,struct mana_txq * txq)1884 static void mana_deinit_txq(struct mana_port_context *apc, struct mana_txq *txq)
1885 {
1886 struct gdma_dev *gd = apc->ac->gdma_dev;
1887
1888 if (!txq->gdma_sq)
1889 return;
1890
1891 mana_gd_destroy_queue(gd->gdma_context, txq->gdma_sq);
1892 }
1893
mana_destroy_txq(struct mana_port_context * apc)1894 static void mana_destroy_txq(struct mana_port_context *apc)
1895 {
1896 struct napi_struct *napi;
1897 int i;
1898
1899 if (!apc->tx_qp)
1900 return;
1901
1902 for (i = 0; i < apc->num_queues; i++) {
1903 debugfs_remove_recursive(apc->tx_qp[i].mana_tx_debugfs);
1904 apc->tx_qp[i].mana_tx_debugfs = NULL;
1905
1906 napi = &apc->tx_qp[i].tx_cq.napi;
1907 if (apc->tx_qp[i].txq.napi_initialized) {
1908 napi_synchronize(napi);
1909 napi_disable(napi);
1910 netif_napi_del(napi);
1911 apc->tx_qp[i].txq.napi_initialized = false;
1912 }
1913 mana_destroy_wq_obj(apc, GDMA_SQ, apc->tx_qp[i].tx_object);
1914
1915 mana_deinit_cq(apc, &apc->tx_qp[i].tx_cq);
1916
1917 mana_deinit_txq(apc, &apc->tx_qp[i].txq);
1918 }
1919
1920 kfree(apc->tx_qp);
1921 apc->tx_qp = NULL;
1922 }
1923
mana_create_txq_debugfs(struct mana_port_context * apc,int idx)1924 static void mana_create_txq_debugfs(struct mana_port_context *apc, int idx)
1925 {
1926 struct mana_tx_qp *tx_qp = &apc->tx_qp[idx];
1927 char qnum[32];
1928
1929 sprintf(qnum, "TX-%d", idx);
1930 tx_qp->mana_tx_debugfs = debugfs_create_dir(qnum, apc->mana_port_debugfs);
1931 debugfs_create_u32("sq_head", 0400, tx_qp->mana_tx_debugfs,
1932 &tx_qp->txq.gdma_sq->head);
1933 debugfs_create_u32("sq_tail", 0400, tx_qp->mana_tx_debugfs,
1934 &tx_qp->txq.gdma_sq->tail);
1935 debugfs_create_u32("sq_pend_skb_qlen", 0400, tx_qp->mana_tx_debugfs,
1936 &tx_qp->txq.pending_skbs.qlen);
1937 debugfs_create_u32("cq_head", 0400, tx_qp->mana_tx_debugfs,
1938 &tx_qp->tx_cq.gdma_cq->head);
1939 debugfs_create_u32("cq_tail", 0400, tx_qp->mana_tx_debugfs,
1940 &tx_qp->tx_cq.gdma_cq->tail);
1941 debugfs_create_u32("cq_budget", 0400, tx_qp->mana_tx_debugfs,
1942 &tx_qp->tx_cq.budget);
1943 debugfs_create_file("txq_dump", 0400, tx_qp->mana_tx_debugfs,
1944 tx_qp->txq.gdma_sq, &mana_dbg_q_fops);
1945 debugfs_create_file("cq_dump", 0400, tx_qp->mana_tx_debugfs,
1946 tx_qp->tx_cq.gdma_cq, &mana_dbg_q_fops);
1947 }
1948
mana_create_txq(struct mana_port_context * apc,struct net_device * net)1949 static int mana_create_txq(struct mana_port_context *apc,
1950 struct net_device *net)
1951 {
1952 struct mana_context *ac = apc->ac;
1953 struct gdma_dev *gd = ac->gdma_dev;
1954 struct mana_obj_spec wq_spec;
1955 struct mana_obj_spec cq_spec;
1956 struct gdma_queue_spec spec;
1957 struct gdma_context *gc;
1958 struct mana_txq *txq;
1959 struct mana_cq *cq;
1960 u32 txq_size;
1961 u32 cq_size;
1962 int err;
1963 int i;
1964
1965 apc->tx_qp = kcalloc(apc->num_queues, sizeof(struct mana_tx_qp),
1966 GFP_KERNEL);
1967 if (!apc->tx_qp)
1968 return -ENOMEM;
1969
1970 /* The minimum size of the WQE is 32 bytes, hence
1971 * apc->tx_queue_size represents the maximum number of WQEs
1972 * the SQ can store. This value is then used to size other queues
1973 * to prevent overflow.
1974 * Also note that the txq_size is always going to be MANA_PAGE_ALIGNED,
1975 * as min val of apc->tx_queue_size is 128 and that would make
1976 * txq_size 128*32 = 4096 and the other higher values of apc->tx_queue_size
1977 * are always power of two
1978 */
1979 txq_size = apc->tx_queue_size * 32;
1980
1981 cq_size = apc->tx_queue_size * COMP_ENTRY_SIZE;
1982
1983 gc = gd->gdma_context;
1984
1985 for (i = 0; i < apc->num_queues; i++) {
1986 apc->tx_qp[i].tx_object = INVALID_MANA_HANDLE;
1987
1988 /* Create SQ */
1989 txq = &apc->tx_qp[i].txq;
1990
1991 u64_stats_init(&txq->stats.syncp);
1992 txq->ndev = net;
1993 txq->net_txq = netdev_get_tx_queue(net, i);
1994 txq->vp_offset = apc->tx_vp_offset;
1995 txq->napi_initialized = false;
1996 skb_queue_head_init(&txq->pending_skbs);
1997
1998 memset(&spec, 0, sizeof(spec));
1999 spec.type = GDMA_SQ;
2000 spec.monitor_avl_buf = true;
2001 spec.queue_size = txq_size;
2002 err = mana_gd_create_mana_wq_cq(gd, &spec, &txq->gdma_sq);
2003 if (err)
2004 goto out;
2005
2006 /* Create SQ's CQ */
2007 cq = &apc->tx_qp[i].tx_cq;
2008 cq->type = MANA_CQ_TYPE_TX;
2009
2010 cq->txq = txq;
2011
2012 memset(&spec, 0, sizeof(spec));
2013 spec.type = GDMA_CQ;
2014 spec.monitor_avl_buf = false;
2015 spec.queue_size = cq_size;
2016 spec.cq.callback = mana_schedule_napi;
2017 spec.cq.parent_eq = ac->eqs[i].eq;
2018 spec.cq.context = cq;
2019 err = mana_gd_create_mana_wq_cq(gd, &spec, &cq->gdma_cq);
2020 if (err)
2021 goto out;
2022
2023 memset(&wq_spec, 0, sizeof(wq_spec));
2024 memset(&cq_spec, 0, sizeof(cq_spec));
2025
2026 wq_spec.gdma_region = txq->gdma_sq->mem_info.dma_region_handle;
2027 wq_spec.queue_size = txq->gdma_sq->queue_size;
2028
2029 cq_spec.gdma_region = cq->gdma_cq->mem_info.dma_region_handle;
2030 cq_spec.queue_size = cq->gdma_cq->queue_size;
2031 cq_spec.modr_ctx_id = 0;
2032 cq_spec.attached_eq = cq->gdma_cq->cq.parent->id;
2033
2034 err = mana_create_wq_obj(apc, apc->port_handle, GDMA_SQ,
2035 &wq_spec, &cq_spec,
2036 &apc->tx_qp[i].tx_object);
2037
2038 if (err)
2039 goto out;
2040
2041 txq->gdma_sq->id = wq_spec.queue_index;
2042 cq->gdma_cq->id = cq_spec.queue_index;
2043
2044 txq->gdma_sq->mem_info.dma_region_handle =
2045 GDMA_INVALID_DMA_REGION;
2046 cq->gdma_cq->mem_info.dma_region_handle =
2047 GDMA_INVALID_DMA_REGION;
2048
2049 txq->gdma_txq_id = txq->gdma_sq->id;
2050
2051 cq->gdma_id = cq->gdma_cq->id;
2052
2053 if (WARN_ON(cq->gdma_id >= gc->max_num_cqs)) {
2054 err = -EINVAL;
2055 goto out;
2056 }
2057
2058 gc->cq_table[cq->gdma_id] = cq->gdma_cq;
2059
2060 mana_create_txq_debugfs(apc, i);
2061
2062 netif_napi_add_tx(net, &cq->napi, mana_poll);
2063 napi_enable(&cq->napi);
2064 txq->napi_initialized = true;
2065
2066 mana_gd_ring_cq(cq->gdma_cq, SET_ARM_BIT);
2067 }
2068
2069 return 0;
2070 out:
2071 netdev_err(net, "Failed to create %d TX queues, %d\n",
2072 apc->num_queues, err);
2073 mana_destroy_txq(apc);
2074 return err;
2075 }
2076
mana_destroy_rxq(struct mana_port_context * apc,struct mana_rxq * rxq,bool napi_initialized)2077 static void mana_destroy_rxq(struct mana_port_context *apc,
2078 struct mana_rxq *rxq, bool napi_initialized)
2079
2080 {
2081 struct gdma_context *gc = apc->ac->gdma_dev->gdma_context;
2082 struct mana_recv_buf_oob *rx_oob;
2083 struct device *dev = gc->dev;
2084 struct napi_struct *napi;
2085 struct page *page;
2086 int i;
2087
2088 if (!rxq)
2089 return;
2090
2091 debugfs_remove_recursive(rxq->mana_rx_debugfs);
2092 rxq->mana_rx_debugfs = NULL;
2093
2094 napi = &rxq->rx_cq.napi;
2095
2096 if (napi_initialized) {
2097 napi_synchronize(napi);
2098
2099 napi_disable(napi);
2100
2101 netif_napi_del(napi);
2102 }
2103 xdp_rxq_info_unreg(&rxq->xdp_rxq);
2104
2105 mana_destroy_wq_obj(apc, GDMA_RQ, rxq->rxobj);
2106
2107 mana_deinit_cq(apc, &rxq->rx_cq);
2108
2109 if (rxq->xdp_save_va)
2110 put_page(virt_to_head_page(rxq->xdp_save_va));
2111
2112 for (i = 0; i < rxq->num_rx_buf; i++) {
2113 rx_oob = &rxq->rx_oobs[i];
2114
2115 if (!rx_oob->buf_va)
2116 continue;
2117
2118 dma_unmap_single(dev, rx_oob->sgl[0].address,
2119 rx_oob->sgl[0].size, DMA_FROM_DEVICE);
2120
2121 page = virt_to_head_page(rx_oob->buf_va);
2122
2123 if (rx_oob->from_pool)
2124 page_pool_put_full_page(rxq->page_pool, page, false);
2125 else
2126 put_page(page);
2127
2128 rx_oob->buf_va = NULL;
2129 }
2130
2131 page_pool_destroy(rxq->page_pool);
2132
2133 if (rxq->gdma_rq)
2134 mana_gd_destroy_queue(gc, rxq->gdma_rq);
2135
2136 kfree(rxq);
2137 }
2138
mana_fill_rx_oob(struct mana_recv_buf_oob * rx_oob,u32 mem_key,struct mana_rxq * rxq,struct device * dev)2139 static int mana_fill_rx_oob(struct mana_recv_buf_oob *rx_oob, u32 mem_key,
2140 struct mana_rxq *rxq, struct device *dev)
2141 {
2142 struct mana_port_context *mpc = netdev_priv(rxq->ndev);
2143 bool from_pool = false;
2144 dma_addr_t da;
2145 void *va;
2146
2147 if (mpc->rxbufs_pre)
2148 va = mana_get_rxbuf_pre(rxq, &da);
2149 else
2150 va = mana_get_rxfrag(rxq, dev, &da, &from_pool);
2151
2152 if (!va)
2153 return -ENOMEM;
2154
2155 rx_oob->buf_va = va;
2156 rx_oob->from_pool = from_pool;
2157
2158 rx_oob->sgl[0].address = da;
2159 rx_oob->sgl[0].size = rxq->datasize;
2160 rx_oob->sgl[0].mem_key = mem_key;
2161
2162 return 0;
2163 }
2164
2165 #define MANA_WQE_HEADER_SIZE 16
2166 #define MANA_WQE_SGE_SIZE 16
2167
mana_alloc_rx_wqe(struct mana_port_context * apc,struct mana_rxq * rxq,u32 * rxq_size,u32 * cq_size)2168 static int mana_alloc_rx_wqe(struct mana_port_context *apc,
2169 struct mana_rxq *rxq, u32 *rxq_size, u32 *cq_size)
2170 {
2171 struct gdma_context *gc = apc->ac->gdma_dev->gdma_context;
2172 struct mana_recv_buf_oob *rx_oob;
2173 struct device *dev = gc->dev;
2174 u32 buf_idx;
2175 int ret;
2176
2177 WARN_ON(rxq->datasize == 0);
2178
2179 *rxq_size = 0;
2180 *cq_size = 0;
2181
2182 for (buf_idx = 0; buf_idx < rxq->num_rx_buf; buf_idx++) {
2183 rx_oob = &rxq->rx_oobs[buf_idx];
2184 memset(rx_oob, 0, sizeof(*rx_oob));
2185
2186 rx_oob->num_sge = 1;
2187
2188 ret = mana_fill_rx_oob(rx_oob, apc->ac->gdma_dev->gpa_mkey, rxq,
2189 dev);
2190 if (ret)
2191 return ret;
2192
2193 rx_oob->wqe_req.sgl = rx_oob->sgl;
2194 rx_oob->wqe_req.num_sge = rx_oob->num_sge;
2195 rx_oob->wqe_req.inline_oob_size = 0;
2196 rx_oob->wqe_req.inline_oob_data = NULL;
2197 rx_oob->wqe_req.flags = 0;
2198 rx_oob->wqe_req.client_data_unit = 0;
2199
2200 *rxq_size += ALIGN(MANA_WQE_HEADER_SIZE +
2201 MANA_WQE_SGE_SIZE * rx_oob->num_sge, 32);
2202 *cq_size += COMP_ENTRY_SIZE;
2203 }
2204
2205 return 0;
2206 }
2207
mana_push_wqe(struct mana_rxq * rxq)2208 static int mana_push_wqe(struct mana_rxq *rxq)
2209 {
2210 struct mana_recv_buf_oob *rx_oob;
2211 u32 buf_idx;
2212 int err;
2213
2214 for (buf_idx = 0; buf_idx < rxq->num_rx_buf; buf_idx++) {
2215 rx_oob = &rxq->rx_oobs[buf_idx];
2216
2217 err = mana_gd_post_and_ring(rxq->gdma_rq, &rx_oob->wqe_req,
2218 &rx_oob->wqe_inf);
2219 if (err)
2220 return -ENOSPC;
2221 }
2222
2223 return 0;
2224 }
2225
mana_create_page_pool(struct mana_rxq * rxq,struct gdma_context * gc)2226 static int mana_create_page_pool(struct mana_rxq *rxq, struct gdma_context *gc)
2227 {
2228 struct mana_port_context *mpc = netdev_priv(rxq->ndev);
2229 struct page_pool_params pprm = {};
2230 int ret;
2231
2232 pprm.pool_size = mpc->rx_queue_size;
2233 pprm.nid = gc->numa_node;
2234 pprm.napi = &rxq->rx_cq.napi;
2235 pprm.netdev = rxq->ndev;
2236 pprm.order = get_order(rxq->alloc_size);
2237
2238 rxq->page_pool = page_pool_create(&pprm);
2239
2240 if (IS_ERR(rxq->page_pool)) {
2241 ret = PTR_ERR(rxq->page_pool);
2242 rxq->page_pool = NULL;
2243 return ret;
2244 }
2245
2246 return 0;
2247 }
2248
mana_create_rxq(struct mana_port_context * apc,u32 rxq_idx,struct mana_eq * eq,struct net_device * ndev)2249 static struct mana_rxq *mana_create_rxq(struct mana_port_context *apc,
2250 u32 rxq_idx, struct mana_eq *eq,
2251 struct net_device *ndev)
2252 {
2253 struct gdma_dev *gd = apc->ac->gdma_dev;
2254 struct mana_obj_spec wq_spec;
2255 struct mana_obj_spec cq_spec;
2256 struct gdma_queue_spec spec;
2257 struct mana_cq *cq = NULL;
2258 struct gdma_context *gc;
2259 u32 cq_size, rq_size;
2260 struct mana_rxq *rxq;
2261 int err;
2262
2263 gc = gd->gdma_context;
2264
2265 rxq = kzalloc(struct_size(rxq, rx_oobs, apc->rx_queue_size),
2266 GFP_KERNEL);
2267 if (!rxq)
2268 return NULL;
2269
2270 rxq->ndev = ndev;
2271 rxq->num_rx_buf = apc->rx_queue_size;
2272 rxq->rxq_idx = rxq_idx;
2273 rxq->rxobj = INVALID_MANA_HANDLE;
2274
2275 mana_get_rxbuf_cfg(ndev->mtu, &rxq->datasize, &rxq->alloc_size,
2276 &rxq->headroom);
2277
2278 /* Create page pool for RX queue */
2279 err = mana_create_page_pool(rxq, gc);
2280 if (err) {
2281 netdev_err(ndev, "Create page pool err:%d\n", err);
2282 goto out;
2283 }
2284
2285 err = mana_alloc_rx_wqe(apc, rxq, &rq_size, &cq_size);
2286 if (err)
2287 goto out;
2288
2289 rq_size = MANA_PAGE_ALIGN(rq_size);
2290 cq_size = MANA_PAGE_ALIGN(cq_size);
2291
2292 /* Create RQ */
2293 memset(&spec, 0, sizeof(spec));
2294 spec.type = GDMA_RQ;
2295 spec.monitor_avl_buf = true;
2296 spec.queue_size = rq_size;
2297 err = mana_gd_create_mana_wq_cq(gd, &spec, &rxq->gdma_rq);
2298 if (err)
2299 goto out;
2300
2301 /* Create RQ's CQ */
2302 cq = &rxq->rx_cq;
2303 cq->type = MANA_CQ_TYPE_RX;
2304 cq->rxq = rxq;
2305
2306 memset(&spec, 0, sizeof(spec));
2307 spec.type = GDMA_CQ;
2308 spec.monitor_avl_buf = false;
2309 spec.queue_size = cq_size;
2310 spec.cq.callback = mana_schedule_napi;
2311 spec.cq.parent_eq = eq->eq;
2312 spec.cq.context = cq;
2313 err = mana_gd_create_mana_wq_cq(gd, &spec, &cq->gdma_cq);
2314 if (err)
2315 goto out;
2316
2317 memset(&wq_spec, 0, sizeof(wq_spec));
2318 memset(&cq_spec, 0, sizeof(cq_spec));
2319 wq_spec.gdma_region = rxq->gdma_rq->mem_info.dma_region_handle;
2320 wq_spec.queue_size = rxq->gdma_rq->queue_size;
2321
2322 cq_spec.gdma_region = cq->gdma_cq->mem_info.dma_region_handle;
2323 cq_spec.queue_size = cq->gdma_cq->queue_size;
2324 cq_spec.modr_ctx_id = 0;
2325 cq_spec.attached_eq = cq->gdma_cq->cq.parent->id;
2326
2327 err = mana_create_wq_obj(apc, apc->port_handle, GDMA_RQ,
2328 &wq_spec, &cq_spec, &rxq->rxobj);
2329 if (err)
2330 goto out;
2331
2332 rxq->gdma_rq->id = wq_spec.queue_index;
2333 cq->gdma_cq->id = cq_spec.queue_index;
2334
2335 rxq->gdma_rq->mem_info.dma_region_handle = GDMA_INVALID_DMA_REGION;
2336 cq->gdma_cq->mem_info.dma_region_handle = GDMA_INVALID_DMA_REGION;
2337
2338 rxq->gdma_id = rxq->gdma_rq->id;
2339 cq->gdma_id = cq->gdma_cq->id;
2340
2341 err = mana_push_wqe(rxq);
2342 if (err)
2343 goto out;
2344
2345 if (WARN_ON(cq->gdma_id >= gc->max_num_cqs)) {
2346 err = -EINVAL;
2347 goto out;
2348 }
2349
2350 gc->cq_table[cq->gdma_id] = cq->gdma_cq;
2351
2352 netif_napi_add_weight(ndev, &cq->napi, mana_poll, 1);
2353
2354 WARN_ON(xdp_rxq_info_reg(&rxq->xdp_rxq, ndev, rxq_idx,
2355 cq->napi.napi_id));
2356 WARN_ON(xdp_rxq_info_reg_mem_model(&rxq->xdp_rxq, MEM_TYPE_PAGE_POOL,
2357 rxq->page_pool));
2358
2359 napi_enable(&cq->napi);
2360
2361 mana_gd_ring_cq(cq->gdma_cq, SET_ARM_BIT);
2362 out:
2363 if (!err)
2364 return rxq;
2365
2366 netdev_err(ndev, "Failed to create RXQ: err = %d\n", err);
2367
2368 mana_destroy_rxq(apc, rxq, false);
2369
2370 if (cq)
2371 mana_deinit_cq(apc, cq);
2372
2373 return NULL;
2374 }
2375
mana_create_rxq_debugfs(struct mana_port_context * apc,int idx)2376 static void mana_create_rxq_debugfs(struct mana_port_context *apc, int idx)
2377 {
2378 struct mana_rxq *rxq;
2379 char qnum[32];
2380
2381 rxq = apc->rxqs[idx];
2382
2383 sprintf(qnum, "RX-%d", idx);
2384 rxq->mana_rx_debugfs = debugfs_create_dir(qnum, apc->mana_port_debugfs);
2385 debugfs_create_u32("rq_head", 0400, rxq->mana_rx_debugfs, &rxq->gdma_rq->head);
2386 debugfs_create_u32("rq_tail", 0400, rxq->mana_rx_debugfs, &rxq->gdma_rq->tail);
2387 debugfs_create_u32("rq_nbuf", 0400, rxq->mana_rx_debugfs, &rxq->num_rx_buf);
2388 debugfs_create_u32("cq_head", 0400, rxq->mana_rx_debugfs,
2389 &rxq->rx_cq.gdma_cq->head);
2390 debugfs_create_u32("cq_tail", 0400, rxq->mana_rx_debugfs,
2391 &rxq->rx_cq.gdma_cq->tail);
2392 debugfs_create_u32("cq_budget", 0400, rxq->mana_rx_debugfs, &rxq->rx_cq.budget);
2393 debugfs_create_file("rxq_dump", 0400, rxq->mana_rx_debugfs, rxq->gdma_rq, &mana_dbg_q_fops);
2394 debugfs_create_file("cq_dump", 0400, rxq->mana_rx_debugfs, rxq->rx_cq.gdma_cq,
2395 &mana_dbg_q_fops);
2396 }
2397
mana_add_rx_queues(struct mana_port_context * apc,struct net_device * ndev)2398 static int mana_add_rx_queues(struct mana_port_context *apc,
2399 struct net_device *ndev)
2400 {
2401 struct mana_context *ac = apc->ac;
2402 struct mana_rxq *rxq;
2403 int err = 0;
2404 int i;
2405
2406 for (i = 0; i < apc->num_queues; i++) {
2407 rxq = mana_create_rxq(apc, i, &ac->eqs[i], ndev);
2408 if (!rxq) {
2409 err = -ENOMEM;
2410 netdev_err(ndev, "Failed to create rxq %d : %d\n", i, err);
2411 goto out;
2412 }
2413
2414 u64_stats_init(&rxq->stats.syncp);
2415
2416 apc->rxqs[i] = rxq;
2417
2418 mana_create_rxq_debugfs(apc, i);
2419 }
2420
2421 apc->default_rxobj = apc->rxqs[0]->rxobj;
2422 out:
2423 return err;
2424 }
2425
mana_destroy_vport(struct mana_port_context * apc)2426 static void mana_destroy_vport(struct mana_port_context *apc)
2427 {
2428 struct gdma_dev *gd = apc->ac->gdma_dev;
2429 struct mana_rxq *rxq;
2430 u32 rxq_idx;
2431
2432 for (rxq_idx = 0; rxq_idx < apc->num_queues; rxq_idx++) {
2433 rxq = apc->rxqs[rxq_idx];
2434 if (!rxq)
2435 continue;
2436
2437 mana_destroy_rxq(apc, rxq, true);
2438 apc->rxqs[rxq_idx] = NULL;
2439 }
2440
2441 mana_destroy_txq(apc);
2442 mana_uncfg_vport(apc);
2443
2444 if (gd->gdma_context->is_pf)
2445 mana_pf_deregister_hw_vport(apc);
2446 }
2447
mana_create_vport(struct mana_port_context * apc,struct net_device * net)2448 static int mana_create_vport(struct mana_port_context *apc,
2449 struct net_device *net)
2450 {
2451 struct gdma_dev *gd = apc->ac->gdma_dev;
2452 int err;
2453
2454 apc->default_rxobj = INVALID_MANA_HANDLE;
2455
2456 if (gd->gdma_context->is_pf) {
2457 err = mana_pf_register_hw_vport(apc);
2458 if (err)
2459 return err;
2460 }
2461
2462 err = mana_cfg_vport(apc, gd->pdid, gd->doorbell);
2463 if (err)
2464 return err;
2465
2466 return mana_create_txq(apc, net);
2467 }
2468
mana_rss_table_alloc(struct mana_port_context * apc)2469 static int mana_rss_table_alloc(struct mana_port_context *apc)
2470 {
2471 if (!apc->indir_table_sz) {
2472 netdev_err(apc->ndev,
2473 "Indirection table size not set for vPort %d\n",
2474 apc->port_idx);
2475 return -EINVAL;
2476 }
2477
2478 apc->indir_table = kcalloc(apc->indir_table_sz, sizeof(u32), GFP_KERNEL);
2479 if (!apc->indir_table)
2480 return -ENOMEM;
2481
2482 apc->rxobj_table = kcalloc(apc->indir_table_sz, sizeof(mana_handle_t), GFP_KERNEL);
2483 if (!apc->rxobj_table) {
2484 kfree(apc->indir_table);
2485 return -ENOMEM;
2486 }
2487
2488 return 0;
2489 }
2490
mana_rss_table_init(struct mana_port_context * apc)2491 static void mana_rss_table_init(struct mana_port_context *apc)
2492 {
2493 int i;
2494
2495 for (i = 0; i < apc->indir_table_sz; i++)
2496 apc->indir_table[i] =
2497 ethtool_rxfh_indir_default(i, apc->num_queues);
2498 }
2499
mana_config_rss(struct mana_port_context * apc,enum TRI_STATE rx,bool update_hash,bool update_tab)2500 int mana_config_rss(struct mana_port_context *apc, enum TRI_STATE rx,
2501 bool update_hash, bool update_tab)
2502 {
2503 u32 queue_idx;
2504 int err;
2505 int i;
2506
2507 if (update_tab) {
2508 for (i = 0; i < apc->indir_table_sz; i++) {
2509 queue_idx = apc->indir_table[i];
2510 apc->rxobj_table[i] = apc->rxqs[queue_idx]->rxobj;
2511 }
2512 }
2513
2514 err = mana_cfg_vport_steering(apc, rx, true, update_hash, update_tab);
2515 if (err)
2516 return err;
2517
2518 mana_fence_rqs(apc);
2519
2520 return 0;
2521 }
2522
mana_query_gf_stats(struct mana_port_context * apc)2523 void mana_query_gf_stats(struct mana_port_context *apc)
2524 {
2525 struct mana_query_gf_stat_resp resp = {};
2526 struct mana_query_gf_stat_req req = {};
2527 struct net_device *ndev = apc->ndev;
2528 int err;
2529
2530 mana_gd_init_req_hdr(&req.hdr, MANA_QUERY_GF_STAT,
2531 sizeof(req), sizeof(resp));
2532 req.hdr.resp.msg_version = GDMA_MESSAGE_V2;
2533 req.req_stats = STATISTICS_FLAGS_RX_DISCARDS_NO_WQE |
2534 STATISTICS_FLAGS_RX_ERRORS_VPORT_DISABLED |
2535 STATISTICS_FLAGS_HC_RX_BYTES |
2536 STATISTICS_FLAGS_HC_RX_UCAST_PACKETS |
2537 STATISTICS_FLAGS_HC_RX_UCAST_BYTES |
2538 STATISTICS_FLAGS_HC_RX_MCAST_PACKETS |
2539 STATISTICS_FLAGS_HC_RX_MCAST_BYTES |
2540 STATISTICS_FLAGS_HC_RX_BCAST_PACKETS |
2541 STATISTICS_FLAGS_HC_RX_BCAST_BYTES |
2542 STATISTICS_FLAGS_TX_ERRORS_GF_DISABLED |
2543 STATISTICS_FLAGS_TX_ERRORS_VPORT_DISABLED |
2544 STATISTICS_FLAGS_TX_ERRORS_INVAL_VPORT_OFFSET_PACKETS |
2545 STATISTICS_FLAGS_TX_ERRORS_VLAN_ENFORCEMENT |
2546 STATISTICS_FLAGS_TX_ERRORS_ETH_TYPE_ENFORCEMENT |
2547 STATISTICS_FLAGS_TX_ERRORS_SA_ENFORCEMENT |
2548 STATISTICS_FLAGS_TX_ERRORS_SQPDID_ENFORCEMENT |
2549 STATISTICS_FLAGS_TX_ERRORS_CQPDID_ENFORCEMENT |
2550 STATISTICS_FLAGS_TX_ERRORS_MTU_VIOLATION |
2551 STATISTICS_FLAGS_TX_ERRORS_INVALID_OOB |
2552 STATISTICS_FLAGS_HC_TX_BYTES |
2553 STATISTICS_FLAGS_HC_TX_UCAST_PACKETS |
2554 STATISTICS_FLAGS_HC_TX_UCAST_BYTES |
2555 STATISTICS_FLAGS_HC_TX_MCAST_PACKETS |
2556 STATISTICS_FLAGS_HC_TX_MCAST_BYTES |
2557 STATISTICS_FLAGS_HC_TX_BCAST_PACKETS |
2558 STATISTICS_FLAGS_HC_TX_BCAST_BYTES |
2559 STATISTICS_FLAGS_TX_ERRORS_GDMA_ERROR;
2560
2561 err = mana_send_request(apc->ac, &req, sizeof(req), &resp,
2562 sizeof(resp));
2563 if (err) {
2564 netdev_err(ndev, "Failed to query GF stats: %d\n", err);
2565 return;
2566 }
2567 err = mana_verify_resp_hdr(&resp.hdr, MANA_QUERY_GF_STAT,
2568 sizeof(resp));
2569 if (err || resp.hdr.status) {
2570 netdev_err(ndev, "Failed to query GF stats: %d, 0x%x\n", err,
2571 resp.hdr.status);
2572 return;
2573 }
2574
2575 apc->eth_stats.hc_rx_discards_no_wqe = resp.rx_discards_nowqe;
2576 apc->eth_stats.hc_rx_err_vport_disabled = resp.rx_err_vport_disabled;
2577 apc->eth_stats.hc_rx_bytes = resp.hc_rx_bytes;
2578 apc->eth_stats.hc_rx_ucast_pkts = resp.hc_rx_ucast_pkts;
2579 apc->eth_stats.hc_rx_ucast_bytes = resp.hc_rx_ucast_bytes;
2580 apc->eth_stats.hc_rx_bcast_pkts = resp.hc_rx_bcast_pkts;
2581 apc->eth_stats.hc_rx_bcast_bytes = resp.hc_rx_bcast_bytes;
2582 apc->eth_stats.hc_rx_mcast_pkts = resp.hc_rx_mcast_pkts;
2583 apc->eth_stats.hc_rx_mcast_bytes = resp.hc_rx_mcast_bytes;
2584 apc->eth_stats.hc_tx_err_gf_disabled = resp.tx_err_gf_disabled;
2585 apc->eth_stats.hc_tx_err_vport_disabled = resp.tx_err_vport_disabled;
2586 apc->eth_stats.hc_tx_err_inval_vportoffset_pkt =
2587 resp.tx_err_inval_vport_offset_pkt;
2588 apc->eth_stats.hc_tx_err_vlan_enforcement =
2589 resp.tx_err_vlan_enforcement;
2590 apc->eth_stats.hc_tx_err_eth_type_enforcement =
2591 resp.tx_err_ethtype_enforcement;
2592 apc->eth_stats.hc_tx_err_sa_enforcement = resp.tx_err_SA_enforcement;
2593 apc->eth_stats.hc_tx_err_sqpdid_enforcement =
2594 resp.tx_err_SQPDID_enforcement;
2595 apc->eth_stats.hc_tx_err_cqpdid_enforcement =
2596 resp.tx_err_CQPDID_enforcement;
2597 apc->eth_stats.hc_tx_err_mtu_violation = resp.tx_err_mtu_violation;
2598 apc->eth_stats.hc_tx_err_inval_oob = resp.tx_err_inval_oob;
2599 apc->eth_stats.hc_tx_bytes = resp.hc_tx_bytes;
2600 apc->eth_stats.hc_tx_ucast_pkts = resp.hc_tx_ucast_pkts;
2601 apc->eth_stats.hc_tx_ucast_bytes = resp.hc_tx_ucast_bytes;
2602 apc->eth_stats.hc_tx_bcast_pkts = resp.hc_tx_bcast_pkts;
2603 apc->eth_stats.hc_tx_bcast_bytes = resp.hc_tx_bcast_bytes;
2604 apc->eth_stats.hc_tx_mcast_pkts = resp.hc_tx_mcast_pkts;
2605 apc->eth_stats.hc_tx_mcast_bytes = resp.hc_tx_mcast_bytes;
2606 apc->eth_stats.hc_tx_err_gdma = resp.tx_err_gdma;
2607 }
2608
mana_init_port(struct net_device * ndev)2609 static int mana_init_port(struct net_device *ndev)
2610 {
2611 struct mana_port_context *apc = netdev_priv(ndev);
2612 struct gdma_dev *gd = apc->ac->gdma_dev;
2613 u32 max_txq, max_rxq, max_queues;
2614 int port_idx = apc->port_idx;
2615 struct gdma_context *gc;
2616 char vport[32];
2617 int err;
2618
2619 err = mana_init_port_context(apc);
2620 if (err)
2621 return err;
2622
2623 gc = gd->gdma_context;
2624
2625 err = mana_query_vport_cfg(apc, port_idx, &max_txq, &max_rxq,
2626 &apc->indir_table_sz);
2627 if (err) {
2628 netdev_err(ndev, "Failed to query info for vPort %d\n",
2629 port_idx);
2630 goto reset_apc;
2631 }
2632
2633 max_queues = min_t(u32, max_txq, max_rxq);
2634 if (apc->max_queues > max_queues)
2635 apc->max_queues = max_queues;
2636
2637 if (apc->num_queues > apc->max_queues)
2638 apc->num_queues = apc->max_queues;
2639
2640 eth_hw_addr_set(ndev, apc->mac_addr);
2641 sprintf(vport, "vport%d", port_idx);
2642 apc->mana_port_debugfs = debugfs_create_dir(vport, gc->mana_pci_debugfs);
2643 return 0;
2644
2645 reset_apc:
2646 mana_cleanup_port_context(apc);
2647 return err;
2648 }
2649
mana_alloc_queues(struct net_device * ndev)2650 int mana_alloc_queues(struct net_device *ndev)
2651 {
2652 struct mana_port_context *apc = netdev_priv(ndev);
2653 struct gdma_dev *gd = apc->ac->gdma_dev;
2654 int err;
2655
2656 err = mana_create_vport(apc, ndev);
2657 if (err) {
2658 netdev_err(ndev, "Failed to create vPort %u : %d\n", apc->port_idx, err);
2659 return err;
2660 }
2661
2662 err = netif_set_real_num_tx_queues(ndev, apc->num_queues);
2663 if (err) {
2664 netdev_err(ndev,
2665 "netif_set_real_num_tx_queues () failed for ndev with num_queues %u : %d\n",
2666 apc->num_queues, err);
2667 goto destroy_vport;
2668 }
2669
2670 err = mana_add_rx_queues(apc, ndev);
2671 if (err)
2672 goto destroy_vport;
2673
2674 apc->rss_state = apc->num_queues > 1 ? TRI_STATE_TRUE : TRI_STATE_FALSE;
2675
2676 err = netif_set_real_num_rx_queues(ndev, apc->num_queues);
2677 if (err) {
2678 netdev_err(ndev,
2679 "netif_set_real_num_rx_queues () failed for ndev with num_queues %u : %d\n",
2680 apc->num_queues, err);
2681 goto destroy_vport;
2682 }
2683
2684 mana_rss_table_init(apc);
2685
2686 err = mana_config_rss(apc, TRI_STATE_TRUE, true, true);
2687 if (err) {
2688 netdev_err(ndev, "Failed to configure RSS table: %d\n", err);
2689 goto destroy_vport;
2690 }
2691
2692 if (gd->gdma_context->is_pf) {
2693 err = mana_pf_register_filter(apc);
2694 if (err)
2695 goto destroy_vport;
2696 }
2697
2698 mana_chn_setxdp(apc, mana_xdp_get(apc));
2699
2700 return 0;
2701
2702 destroy_vport:
2703 mana_destroy_vport(apc);
2704 return err;
2705 }
2706
mana_attach(struct net_device * ndev)2707 int mana_attach(struct net_device *ndev)
2708 {
2709 struct mana_port_context *apc = netdev_priv(ndev);
2710 int err;
2711
2712 ASSERT_RTNL();
2713
2714 err = mana_init_port(ndev);
2715 if (err)
2716 return err;
2717
2718 if (apc->port_st_save) {
2719 err = mana_alloc_queues(ndev);
2720 if (err) {
2721 mana_cleanup_port_context(apc);
2722 return err;
2723 }
2724 }
2725
2726 apc->port_is_up = apc->port_st_save;
2727
2728 /* Ensure port state updated before txq state */
2729 smp_wmb();
2730
2731 if (apc->port_is_up)
2732 netif_carrier_on(ndev);
2733
2734 netif_device_attach(ndev);
2735
2736 return 0;
2737 }
2738
mana_dealloc_queues(struct net_device * ndev)2739 static int mana_dealloc_queues(struct net_device *ndev)
2740 {
2741 struct mana_port_context *apc = netdev_priv(ndev);
2742 unsigned long timeout = jiffies + 120 * HZ;
2743 struct gdma_dev *gd = apc->ac->gdma_dev;
2744 struct mana_txq *txq;
2745 struct sk_buff *skb;
2746 int i, err;
2747 u32 tsleep;
2748
2749 if (apc->port_is_up)
2750 return -EINVAL;
2751
2752 mana_chn_setxdp(apc, NULL);
2753
2754 if (gd->gdma_context->is_pf)
2755 mana_pf_deregister_filter(apc);
2756
2757 /* No packet can be transmitted now since apc->port_is_up is false.
2758 * There is still a tiny chance that mana_poll_tx_cq() can re-enable
2759 * a txq because it may not timely see apc->port_is_up being cleared
2760 * to false, but it doesn't matter since mana_start_xmit() drops any
2761 * new packets due to apc->port_is_up being false.
2762 *
2763 * Drain all the in-flight TX packets.
2764 * A timeout of 120 seconds for all the queues is used.
2765 * This will break the while loop when h/w is not responding.
2766 * This value of 120 has been decided here considering max
2767 * number of queues.
2768 */
2769
2770 for (i = 0; i < apc->num_queues; i++) {
2771 txq = &apc->tx_qp[i].txq;
2772 tsleep = 1000;
2773 while (atomic_read(&txq->pending_sends) > 0 &&
2774 time_before(jiffies, timeout)) {
2775 usleep_range(tsleep, tsleep + 1000);
2776 tsleep <<= 1;
2777 }
2778 if (atomic_read(&txq->pending_sends)) {
2779 err = pcie_flr(to_pci_dev(gd->gdma_context->dev));
2780 if (err) {
2781 netdev_err(ndev, "flr failed %d with %d pkts pending in txq %u\n",
2782 err, atomic_read(&txq->pending_sends),
2783 txq->gdma_txq_id);
2784 }
2785 break;
2786 }
2787 }
2788
2789 for (i = 0; i < apc->num_queues; i++) {
2790 txq = &apc->tx_qp[i].txq;
2791 while ((skb = skb_dequeue(&txq->pending_skbs))) {
2792 mana_unmap_skb(skb, apc);
2793 dev_kfree_skb_any(skb);
2794 }
2795 atomic_set(&txq->pending_sends, 0);
2796 }
2797 /* We're 100% sure the queues can no longer be woken up, because
2798 * we're sure now mana_poll_tx_cq() can't be running.
2799 */
2800
2801 apc->rss_state = TRI_STATE_FALSE;
2802 err = mana_config_rss(apc, TRI_STATE_FALSE, false, false);
2803 if (err) {
2804 netdev_err(ndev, "Failed to disable vPort: %d\n", err);
2805 return err;
2806 }
2807
2808 mana_destroy_vport(apc);
2809
2810 return 0;
2811 }
2812
mana_detach(struct net_device * ndev,bool from_close)2813 int mana_detach(struct net_device *ndev, bool from_close)
2814 {
2815 struct mana_port_context *apc = netdev_priv(ndev);
2816 int err;
2817
2818 ASSERT_RTNL();
2819
2820 apc->port_st_save = apc->port_is_up;
2821 apc->port_is_up = false;
2822
2823 /* Ensure port state updated before txq state */
2824 smp_wmb();
2825
2826 netif_tx_disable(ndev);
2827 netif_carrier_off(ndev);
2828
2829 if (apc->port_st_save) {
2830 err = mana_dealloc_queues(ndev);
2831 if (err) {
2832 netdev_err(ndev, "%s failed to deallocate queues: %d\n", __func__, err);
2833 return err;
2834 }
2835 }
2836
2837 if (!from_close) {
2838 netif_device_detach(ndev);
2839 mana_cleanup_port_context(apc);
2840 }
2841
2842 return 0;
2843 }
2844
mana_probe_port(struct mana_context * ac,int port_idx,struct net_device ** ndev_storage)2845 static int mana_probe_port(struct mana_context *ac, int port_idx,
2846 struct net_device **ndev_storage)
2847 {
2848 struct gdma_context *gc = ac->gdma_dev->gdma_context;
2849 struct mana_port_context *apc;
2850 struct net_device *ndev;
2851 int err;
2852
2853 ndev = alloc_etherdev_mq(sizeof(struct mana_port_context),
2854 gc->max_num_queues);
2855 if (!ndev)
2856 return -ENOMEM;
2857
2858 *ndev_storage = ndev;
2859
2860 apc = netdev_priv(ndev);
2861 apc->ac = ac;
2862 apc->ndev = ndev;
2863 apc->max_queues = gc->max_num_queues;
2864 apc->num_queues = gc->max_num_queues;
2865 apc->tx_queue_size = DEF_TX_BUFFERS_PER_QUEUE;
2866 apc->rx_queue_size = DEF_RX_BUFFERS_PER_QUEUE;
2867 apc->port_handle = INVALID_MANA_HANDLE;
2868 apc->pf_filter_handle = INVALID_MANA_HANDLE;
2869 apc->port_idx = port_idx;
2870
2871 mutex_init(&apc->vport_mutex);
2872 apc->vport_use_count = 0;
2873
2874 ndev->netdev_ops = &mana_devops;
2875 ndev->ethtool_ops = &mana_ethtool_ops;
2876 ndev->mtu = ETH_DATA_LEN;
2877 ndev->max_mtu = gc->adapter_mtu - ETH_HLEN;
2878 ndev->min_mtu = ETH_MIN_MTU;
2879 ndev->needed_headroom = MANA_HEADROOM;
2880 ndev->dev_port = port_idx;
2881 SET_NETDEV_DEV(ndev, gc->dev);
2882
2883 netif_set_tso_max_size(ndev, GSO_MAX_SIZE);
2884
2885 netif_carrier_off(ndev);
2886
2887 netdev_rss_key_fill(apc->hashkey, MANA_HASH_KEY_SIZE);
2888
2889 err = mana_init_port(ndev);
2890 if (err)
2891 goto free_net;
2892
2893 err = mana_rss_table_alloc(apc);
2894 if (err)
2895 goto reset_apc;
2896
2897 netdev_lockdep_set_classes(ndev);
2898
2899 ndev->hw_features = NETIF_F_SG | NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
2900 ndev->hw_features |= NETIF_F_RXCSUM;
2901 ndev->hw_features |= NETIF_F_TSO | NETIF_F_TSO6;
2902 ndev->hw_features |= NETIF_F_RXHASH;
2903 ndev->features = ndev->hw_features | NETIF_F_HW_VLAN_CTAG_TX |
2904 NETIF_F_HW_VLAN_CTAG_RX;
2905 ndev->vlan_features = ndev->features;
2906 xdp_set_features_flag(ndev, NETDEV_XDP_ACT_BASIC |
2907 NETDEV_XDP_ACT_REDIRECT |
2908 NETDEV_XDP_ACT_NDO_XMIT);
2909
2910 err = register_netdev(ndev);
2911 if (err) {
2912 netdev_err(ndev, "Unable to register netdev.\n");
2913 goto free_indir;
2914 }
2915
2916 return 0;
2917
2918 free_indir:
2919 mana_cleanup_indir_table(apc);
2920 reset_apc:
2921 mana_cleanup_port_context(apc);
2922 free_net:
2923 *ndev_storage = NULL;
2924 netdev_err(ndev, "Failed to probe vPort %d: %d\n", port_idx, err);
2925 free_netdev(ndev);
2926 return err;
2927 }
2928
adev_release(struct device * dev)2929 static void adev_release(struct device *dev)
2930 {
2931 struct mana_adev *madev = container_of(dev, struct mana_adev, adev.dev);
2932
2933 kfree(madev);
2934 }
2935
remove_adev(struct gdma_dev * gd)2936 static void remove_adev(struct gdma_dev *gd)
2937 {
2938 struct auxiliary_device *adev = gd->adev;
2939 int id = adev->id;
2940
2941 auxiliary_device_delete(adev);
2942 auxiliary_device_uninit(adev);
2943
2944 mana_adev_idx_free(id);
2945 gd->adev = NULL;
2946 }
2947
add_adev(struct gdma_dev * gd)2948 static int add_adev(struct gdma_dev *gd)
2949 {
2950 struct auxiliary_device *adev;
2951 struct mana_adev *madev;
2952 int ret;
2953
2954 madev = kzalloc(sizeof(*madev), GFP_KERNEL);
2955 if (!madev)
2956 return -ENOMEM;
2957
2958 adev = &madev->adev;
2959 ret = mana_adev_idx_alloc();
2960 if (ret < 0)
2961 goto idx_fail;
2962 adev->id = ret;
2963
2964 adev->name = "rdma";
2965 adev->dev.parent = gd->gdma_context->dev;
2966 adev->dev.release = adev_release;
2967 madev->mdev = gd;
2968
2969 ret = auxiliary_device_init(adev);
2970 if (ret)
2971 goto init_fail;
2972
2973 /* madev is owned by the auxiliary device */
2974 madev = NULL;
2975 ret = auxiliary_device_add(adev);
2976 if (ret)
2977 goto add_fail;
2978
2979 gd->adev = adev;
2980 dev_dbg(gd->gdma_context->dev,
2981 "Auxiliary device added successfully\n");
2982 return 0;
2983
2984 add_fail:
2985 auxiliary_device_uninit(adev);
2986
2987 init_fail:
2988 mana_adev_idx_free(adev->id);
2989
2990 idx_fail:
2991 kfree(madev);
2992
2993 return ret;
2994 }
2995
mana_probe(struct gdma_dev * gd,bool resuming)2996 int mana_probe(struct gdma_dev *gd, bool resuming)
2997 {
2998 struct gdma_context *gc = gd->gdma_context;
2999 struct mana_context *ac = gd->driver_data;
3000 struct device *dev = gc->dev;
3001 u16 num_ports = 0;
3002 int err;
3003 int i;
3004
3005 dev_info(dev,
3006 "Microsoft Azure Network Adapter protocol version: %d.%d.%d\n",
3007 MANA_MAJOR_VERSION, MANA_MINOR_VERSION, MANA_MICRO_VERSION);
3008
3009 err = mana_gd_register_device(gd);
3010 if (err)
3011 return err;
3012
3013 if (!resuming) {
3014 ac = kzalloc(sizeof(*ac), GFP_KERNEL);
3015 if (!ac)
3016 return -ENOMEM;
3017
3018 ac->gdma_dev = gd;
3019 gd->driver_data = ac;
3020 }
3021
3022 err = mana_create_eq(ac);
3023 if (err) {
3024 dev_err(dev, "Failed to create EQs: %d\n", err);
3025 goto out;
3026 }
3027
3028 err = mana_query_device_cfg(ac, MANA_MAJOR_VERSION, MANA_MINOR_VERSION,
3029 MANA_MICRO_VERSION, &num_ports);
3030 if (err)
3031 goto out;
3032
3033 if (!resuming) {
3034 ac->num_ports = num_ports;
3035 } else {
3036 if (ac->num_ports != num_ports) {
3037 dev_err(dev, "The number of vPorts changed: %d->%d\n",
3038 ac->num_ports, num_ports);
3039 err = -EPROTO;
3040 goto out;
3041 }
3042 }
3043
3044 if (ac->num_ports == 0)
3045 dev_err(dev, "Failed to detect any vPort\n");
3046
3047 if (ac->num_ports > MAX_PORTS_IN_MANA_DEV)
3048 ac->num_ports = MAX_PORTS_IN_MANA_DEV;
3049
3050 if (!resuming) {
3051 for (i = 0; i < ac->num_ports; i++) {
3052 err = mana_probe_port(ac, i, &ac->ports[i]);
3053 /* we log the port for which the probe failed and stop
3054 * probes for subsequent ports.
3055 * Note that we keep running ports, for which the probes
3056 * were successful, unless add_adev fails too
3057 */
3058 if (err) {
3059 dev_err(dev, "Probe Failed for port %d\n", i);
3060 break;
3061 }
3062 }
3063 } else {
3064 for (i = 0; i < ac->num_ports; i++) {
3065 rtnl_lock();
3066 err = mana_attach(ac->ports[i]);
3067 rtnl_unlock();
3068 /* we log the port for which the attach failed and stop
3069 * attach for subsequent ports
3070 * Note that we keep running ports, for which the attach
3071 * were successful, unless add_adev fails too
3072 */
3073 if (err) {
3074 dev_err(dev, "Attach Failed for port %d\n", i);
3075 break;
3076 }
3077 }
3078 }
3079
3080 err = add_adev(gd);
3081 out:
3082 if (err) {
3083 mana_remove(gd, false);
3084 } else {
3085 dev_dbg(dev, "gd=%p, id=%u, num_ports=%d, type=%u, instance=%u\n",
3086 gd, gd->dev_id.as_uint32, ac->num_ports,
3087 gd->dev_id.type, gd->dev_id.instance);
3088 dev_dbg(dev, "%s succeeded\n", __func__);
3089 }
3090
3091 return err;
3092 }
3093
mana_remove(struct gdma_dev * gd,bool suspending)3094 void mana_remove(struct gdma_dev *gd, bool suspending)
3095 {
3096 struct gdma_context *gc = gd->gdma_context;
3097 struct mana_context *ac = gd->driver_data;
3098 struct mana_port_context *apc;
3099 struct device *dev = gc->dev;
3100 struct net_device *ndev;
3101 int err;
3102 int i;
3103
3104 /* adev currently doesn't support suspending, always remove it */
3105 if (gd->adev)
3106 remove_adev(gd);
3107
3108 for (i = 0; i < ac->num_ports; i++) {
3109 ndev = ac->ports[i];
3110 apc = netdev_priv(ndev);
3111 if (!ndev) {
3112 if (i == 0)
3113 dev_err(dev, "No net device to remove\n");
3114 goto out;
3115 }
3116
3117 /* All cleanup actions should stay after rtnl_lock(), otherwise
3118 * other functions may access partially cleaned up data.
3119 */
3120 rtnl_lock();
3121
3122 err = mana_detach(ndev, false);
3123 if (err)
3124 netdev_err(ndev, "Failed to detach vPort %d: %d\n",
3125 i, err);
3126
3127 if (suspending) {
3128 /* No need to unregister the ndev. */
3129 rtnl_unlock();
3130 continue;
3131 }
3132
3133 unregister_netdevice(ndev);
3134 mana_cleanup_indir_table(apc);
3135
3136 rtnl_unlock();
3137
3138 free_netdev(ndev);
3139 }
3140
3141 mana_destroy_eq(ac);
3142 out:
3143 mana_gd_deregister_device(gd);
3144
3145 if (suspending)
3146 return;
3147
3148 gd->driver_data = NULL;
3149 gd->gdma_context = NULL;
3150 kfree(ac);
3151 dev_dbg(dev, "%s succeeded\n", __func__);
3152 }
3153
mana_get_primary_netdev(struct mana_context * ac,u32 port_index,netdevice_tracker * tracker)3154 struct net_device *mana_get_primary_netdev(struct mana_context *ac,
3155 u32 port_index,
3156 netdevice_tracker *tracker)
3157 {
3158 struct net_device *ndev;
3159
3160 if (port_index >= ac->num_ports)
3161 return NULL;
3162
3163 rcu_read_lock();
3164
3165 /* If mana is used in netvsc, the upper netdevice should be returned. */
3166 ndev = netdev_master_upper_dev_get_rcu(ac->ports[port_index]);
3167
3168 /* If there is no upper device, use the parent Ethernet device */
3169 if (!ndev)
3170 ndev = ac->ports[port_index];
3171
3172 netdev_hold(ndev, tracker, GFP_ATOMIC);
3173 rcu_read_unlock();
3174
3175 return ndev;
3176 }
3177 EXPORT_SYMBOL_NS(mana_get_primary_netdev, "NET_MANA");
3178