Lines Matching +full:tx +full:- +full:queues +full:- +full:to +full:- +full:use
4 * Copyright (c) 2002-2005, K A Fraser
11 * software packages, subject to the following license:
13 * Permission is hereby granted, free of charge, to any person obtaining a copy
14 * of this source file (the "Software"), to deal in the Software without
15 * restriction, including without limitation the rights to use, copy, modify,
17 * and to permit persons to whom the Software is furnished to do so, subject to
24 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
28 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
67 "Maximum number of queues per virtual interface");
77 #define NETFRONT_SKB_CB(skb) ((struct netfront_cb *)((skb)->cb))
89 /* Queue name is interface name with "-qNNN" appended */
92 /* IRQ name is queue name with "-tx" or "-rx" appended */
106 unsigned int id; /* Queue ID, 0-based */
107 char name[QUEUE_NAME_SIZE]; /* DEVNAME-qN */
120 char tx_irq_name[IRQ_NAME_SIZE]; /* DEVNAME-qN-tx */
121 char rx_irq_name[IRQ_NAME_SIZE]; /* DEVNAME-qN-rx */
124 struct xen_netif_tx_front_ring tx; member
128 * {tx,rx}_skbs store outstanding skbuffs. Free tx_skb entries
164 /* Multi-queue support */
165 struct netfront_queue *queues; member
183 struct xen_netif_extra_info extras[XEN_NETIF_EXTRA_TYPE_MAX - 1];
210 return idx & (NET_RX_RING_SIZE - 1); in xennet_rxidx()
217 struct sk_buff *skb = queue->rx_skbs[i]; in xennet_get_rx_skb()
218 queue->rx_skbs[i] = NULL; in xennet_get_rx_skb()
226 grant_ref_t ref = queue->grant_rx_ref[i]; in xennet_get_rx_ref()
227 queue->grant_rx_ref[i] = GRANT_INVALID_REF; in xennet_get_rx_ref()
237 return dev->features & NETIF_F_SG; in xennet_can_sg()
244 napi_schedule(&queue->napi); in rx_refill_timeout()
249 return (queue->tx.req_prod_pvt - queue->tx.rsp_cons) < in netfront_tx_slot_available()
250 (NET_TX_RING_SIZE - XEN_NETIF_NR_SLOTS_MIN - 1); in netfront_tx_slot_available()
255 struct net_device *dev = queue->info->netdev; in xennet_maybe_wake_tx()
256 struct netdev_queue *dev_queue = netdev_get_tx_queue(dev, queue->id); in xennet_maybe_wake_tx()
261 netif_tx_wake_queue(netdev_get_tx_queue(dev, queue->id)); in xennet_maybe_wake_tx()
270 skb = __netdev_alloc_skb(queue->info->netdev, in xennet_alloc_one_rx_buffer()
276 page = page_pool_dev_alloc_pages(queue->page_pool); in xennet_alloc_one_rx_buffer()
283 /* Align ip header to a 16 bytes boundary */ in xennet_alloc_one_rx_buffer()
285 skb->dev = queue->info->netdev; in xennet_alloc_one_rx_buffer()
293 RING_IDX req_prod = queue->rx.req_prod_pvt; in xennet_alloc_rx_buffers()
297 if (unlikely(!netif_carrier_ok(queue->info->netdev))) in xennet_alloc_rx_buffers()
300 for (req_prod = queue->rx.req_prod_pvt; in xennet_alloc_rx_buffers()
301 req_prod - queue->rx.rsp_cons < NET_RX_RING_SIZE; in xennet_alloc_rx_buffers()
311 err = -ENOMEM; in xennet_alloc_rx_buffers()
317 BUG_ON(queue->rx_skbs[id]); in xennet_alloc_rx_buffers()
318 queue->rx_skbs[id] = skb; in xennet_alloc_rx_buffers()
320 ref = gnttab_claim_grant_reference(&queue->gref_rx_head); in xennet_alloc_rx_buffers()
322 queue->grant_rx_ref[id] = ref; in xennet_alloc_rx_buffers()
324 page = skb_frag_page(&skb_shinfo(skb)->frags[0]); in xennet_alloc_rx_buffers()
326 req = RING_GET_REQUEST(&queue->rx, req_prod); in xennet_alloc_rx_buffers()
328 queue->info->xbdev->otherend_id, in xennet_alloc_rx_buffers()
331 req->id = id; in xennet_alloc_rx_buffers()
332 req->gref = ref; in xennet_alloc_rx_buffers()
335 queue->rx.req_prod_pvt = req_prod; in xennet_alloc_rx_buffers()
342 if (req_prod - queue->rx.rsp_cons < NET_RX_SLOTS_MIN || in xennet_alloc_rx_buffers()
344 mod_timer(&queue->rx_refill_timer, jiffies + (HZ/10)); in xennet_alloc_rx_buffers()
348 RING_PUSH_REQUESTS_AND_CHECK_NOTIFY(&queue->rx, notify); in xennet_alloc_rx_buffers()
350 notify_remote_via_irq(queue->rx_irq); in xennet_alloc_rx_buffers()
356 unsigned int num_queues = dev->real_num_tx_queues; in xennet_open()
360 if (!np->queues || np->broken) in xennet_open()
361 return -ENODEV; in xennet_open()
364 queue = &np->queues[i]; in xennet_open()
365 napi_enable(&queue->napi); in xennet_open()
367 spin_lock_bh(&queue->rx_lock); in xennet_open()
370 queue->rx.sring->rsp_event = queue->rx.rsp_cons + 1; in xennet_open()
371 if (RING_HAS_UNCONSUMED_RESPONSES(&queue->rx)) in xennet_open()
372 napi_schedule(&queue->napi); in xennet_open()
374 spin_unlock_bh(&queue->rx_lock); in xennet_open()
389 const struct device *dev = &queue->info->netdev->dev; in xennet_tx_buf_gc()
391 BUG_ON(!netif_carrier_ok(queue->info->netdev)); in xennet_tx_buf_gc()
394 prod = queue->tx.sring->rsp_prod; in xennet_tx_buf_gc()
395 if (RING_RESPONSE_PROD_OVERFLOW(&queue->tx, prod)) { in xennet_tx_buf_gc()
397 prod - queue->tx.rsp_cons); in xennet_tx_buf_gc()
400 rmb(); /* Ensure we see responses up to 'rp'. */ in xennet_tx_buf_gc()
402 for (cons = queue->tx.rsp_cons; cons != prod; cons++) { in xennet_tx_buf_gc()
407 RING_COPY_RESPONSE(&queue->tx, cons, &txrsp); in xennet_tx_buf_gc()
412 if (id >= RING_SIZE(&queue->tx)) { in xennet_tx_buf_gc()
418 if (queue->tx_link[id] != TX_PENDING) { in xennet_tx_buf_gc()
424 queue->tx_link[id] = TX_LINK_NONE; in xennet_tx_buf_gc()
425 skb = queue->tx_skbs[id]; in xennet_tx_buf_gc()
426 queue->tx_skbs[id] = NULL; in xennet_tx_buf_gc()
428 queue->grant_tx_ref[id]) != 0)) { in xennet_tx_buf_gc()
430 "Grant still in use by backend domain\n"); in xennet_tx_buf_gc()
434 queue->grant_tx_ref[id], GNTMAP_readonly); in xennet_tx_buf_gc()
436 &queue->gref_tx_head, queue->grant_tx_ref[id]); in xennet_tx_buf_gc()
437 queue->grant_tx_ref[id] = GRANT_INVALID_REF; in xennet_tx_buf_gc()
438 queue->grant_tx_page[id] = NULL; in xennet_tx_buf_gc()
439 add_id_to_list(&queue->tx_skb_freelist, queue->tx_link, id); in xennet_tx_buf_gc()
443 queue->tx.rsp_cons = prod; in xennet_tx_buf_gc()
445 RING_FINAL_CHECK_FOR_RESPONSES(&queue->tx, more_to_do); in xennet_tx_buf_gc()
453 queue->info->broken = true; in xennet_tx_buf_gc()
454 dev_alert(dev, "Disabled for further use\n"); in xennet_tx_buf_gc()
463 struct xen_netif_tx_request *tx; /* Last request on ring page */ member
473 struct xen_netif_tx_request *tx; in xennet_tx_setup_grant() local
476 struct page *page = info->page; in xennet_tx_setup_grant()
477 struct netfront_queue *queue = info->queue; in xennet_tx_setup_grant()
478 struct sk_buff *skb = info->skb; in xennet_tx_setup_grant()
480 id = get_id_from_list(&queue->tx_skb_freelist, queue->tx_link); in xennet_tx_setup_grant()
481 tx = RING_GET_REQUEST(&queue->tx, queue->tx.req_prod_pvt++); in xennet_tx_setup_grant()
482 ref = gnttab_claim_grant_reference(&queue->gref_tx_head); in xennet_tx_setup_grant()
485 gnttab_grant_foreign_access_ref(ref, queue->info->xbdev->otherend_id, in xennet_tx_setup_grant()
488 queue->tx_skbs[id] = skb; in xennet_tx_setup_grant()
489 queue->grant_tx_page[id] = page; in xennet_tx_setup_grant()
490 queue->grant_tx_ref[id] = ref; in xennet_tx_setup_grant()
492 info->tx_local.id = id; in xennet_tx_setup_grant()
493 info->tx_local.gref = ref; in xennet_tx_setup_grant()
494 info->tx_local.offset = offset; in xennet_tx_setup_grant()
495 info->tx_local.size = len; in xennet_tx_setup_grant()
496 info->tx_local.flags = 0; in xennet_tx_setup_grant()
498 *tx = info->tx_local; in xennet_tx_setup_grant()
501 * Put the request in the pending queue, it will be set to be pending in xennet_tx_setup_grant()
502 * when the producer index is about to be raised. in xennet_tx_setup_grant()
504 add_id_to_list(&queue->tx_pend_queue, queue->tx_link, id); in xennet_tx_setup_grant()
506 info->tx = tx; in xennet_tx_setup_grant()
507 info->size += info->tx_local.size; in xennet_tx_setup_grant()
514 info->size = 0; in xennet_make_first_txreq()
516 gnttab_for_one_grant(info->page, offset, len, xennet_tx_setup_grant, info); in xennet_make_first_txreq()
518 return info->tx; in xennet_make_first_txreq()
526 info->tx->flags |= XEN_NETTXF_more_data; in xennet_make_one_txreq()
527 skb_get(info->skb); in xennet_make_one_txreq()
541 info->page = page; in xennet_make_txreqs()
542 info->size = 0; in xennet_make_txreqs()
550 len -= info->size; in xennet_make_txreqs()
555 * Count how many ring slots are required to send this skb. Each frag
560 int i, frags = skb_shinfo(skb)->nr_frags; in xennet_count_skb_slots()
563 slots = gnttab_count_grant(offset_in_page(skb->data), in xennet_count_skb_slots()
567 skb_frag_t *frag = skb_shinfo(skb)->frags + i; in xennet_count_skb_slots()
583 unsigned int num_queues = dev->real_num_tx_queues; in xennet_select_queue()
602 while ((i = get_id_from_list(&queue->tx_pend_queue, queue->tx_link)) != in xennet_mark_tx_pending()
604 queue->tx_link[i] = TX_PENDING; in xennet_mark_tx_pending()
612 struct netfront_stats *tx_stats = this_cpu_ptr(np->tx_stats); in xennet_xdp_xmit_one()
616 .page = virt_to_page(xdpf->data), in xennet_xdp_xmit_one()
621 offset_in_page(xdpf->data), in xennet_xdp_xmit_one()
622 xdpf->len); in xennet_xdp_xmit_one()
626 RING_PUSH_REQUESTS_AND_CHECK_NOTIFY(&queue->tx, notify); in xennet_xdp_xmit_one()
628 notify_remote_via_irq(queue->tx_irq); in xennet_xdp_xmit_one()
630 u64_stats_update_begin(&tx_stats->syncp); in xennet_xdp_xmit_one()
631 tx_stats->bytes += xdpf->len; in xennet_xdp_xmit_one()
632 tx_stats->packets++; in xennet_xdp_xmit_one()
633 u64_stats_update_end(&tx_stats->syncp); in xennet_xdp_xmit_one()
643 unsigned int num_queues = dev->real_num_tx_queues; in xennet_xdp_xmit()
650 if (unlikely(np->broken)) in xennet_xdp_xmit()
651 return -ENODEV; in xennet_xdp_xmit()
653 return -EINVAL; in xennet_xdp_xmit()
655 queue = &np->queues[smp_processor_id() % num_queues]; in xennet_xdp_xmit()
657 spin_lock_irqsave(&queue->tx_lock, irq_flags); in xennet_xdp_xmit()
669 spin_unlock_irqrestore(&queue->tx_lock, irq_flags); in xennet_xdp_xmit()
671 return n - drops; in xennet_xdp_xmit()
680 struct netfront_stats *tx_stats = this_cpu_ptr(np->tx_stats); in xennet_start_xmit()
691 unsigned int num_queues = dev->real_num_tx_queues; in xennet_start_xmit()
695 /* Drop the packet if no queues are set up */ in xennet_start_xmit()
698 if (unlikely(np->broken)) in xennet_start_xmit()
700 /* Determine which queue to transmit this SKB on */ in xennet_start_xmit()
702 queue = &np->queues[queue_index]; in xennet_start_xmit()
704 /* If skb->len is too big for wire format, drop skb and alert in xennet_start_xmit()
707 if (unlikely(skb->len > XEN_NETIF_MAX_TX_SIZE)) { in xennet_start_xmit()
709 "xennet: skb->len = %u, too big for wire format\n", in xennet_start_xmit()
710 skb->len); in xennet_start_xmit()
717 slots, skb->len); in xennet_start_xmit()
722 page = virt_to_page(skb->data); in xennet_start_xmit()
723 offset = offset_in_page(skb->data); in xennet_start_xmit()
728 if (unlikely(PAGE_SIZE - offset < ETH_HLEN)) { in xennet_start_xmit()
734 page = virt_to_page(skb->data); in xennet_start_xmit()
735 offset = offset_in_page(skb->data); in xennet_start_xmit()
740 spin_lock_irqsave(&queue->tx_lock, flags); in xennet_start_xmit()
745 spin_unlock_irqrestore(&queue->tx_lock, flags); in xennet_start_xmit()
759 len -= info.tx_local.size; in xennet_start_xmit()
761 if (skb->ip_summed == CHECKSUM_PARTIAL) in xennet_start_xmit()
763 first_tx->flags |= XEN_NETTXF_csum_blank | in xennet_start_xmit()
765 else if (skb->ip_summed == CHECKSUM_UNNECESSARY) in xennet_start_xmit()
767 first_tx->flags |= XEN_NETTXF_data_validated; in xennet_start_xmit()
770 if (skb_shinfo(skb)->gso_size) { in xennet_start_xmit()
774 RING_GET_REQUEST(&queue->tx, queue->tx.req_prod_pvt++); in xennet_start_xmit()
776 first_tx->flags |= XEN_NETTXF_extra_info; in xennet_start_xmit()
778 gso->u.gso.size = skb_shinfo(skb)->gso_size; in xennet_start_xmit()
779 gso->u.gso.type = (skb_shinfo(skb)->gso_type & SKB_GSO_TCPV6) ? in xennet_start_xmit()
782 gso->u.gso.pad = 0; in xennet_start_xmit()
783 gso->u.gso.features = 0; in xennet_start_xmit()
785 gso->type = XEN_NETIF_EXTRA_TYPE_GSO; in xennet_start_xmit()
786 gso->flags = 0; in xennet_start_xmit()
793 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { in xennet_start_xmit()
794 skb_frag_t *frag = &skb_shinfo(skb)->frags[i]; in xennet_start_xmit()
801 first_tx->size = skb->len; in xennet_start_xmit()
808 RING_PUSH_REQUESTS_AND_CHECK_NOTIFY(&queue->tx, notify); in xennet_start_xmit()
810 notify_remote_via_irq(queue->tx_irq); in xennet_start_xmit()
812 u64_stats_update_begin(&tx_stats->syncp); in xennet_start_xmit()
813 tx_stats->bytes += skb->len; in xennet_start_xmit()
814 tx_stats->packets++; in xennet_start_xmit()
815 u64_stats_update_end(&tx_stats->syncp); in xennet_start_xmit()
817 /* Note: It is not safe to access skb after xennet_tx_buf_gc()! */ in xennet_start_xmit()
821 netif_tx_stop_queue(netdev_get_tx_queue(dev, queue->id)); in xennet_start_xmit()
823 spin_unlock_irqrestore(&queue->tx_lock, flags); in xennet_start_xmit()
828 dev->stats.tx_dropped++; in xennet_start_xmit()
836 unsigned int num_queues = dev->real_num_tx_queues; in xennet_close()
839 netif_tx_stop_all_queues(np->netdev); in xennet_close()
841 queue = &np->queues[i]; in xennet_close()
842 napi_disable(&queue->napi); in xennet_close()
851 spin_lock_irqsave(&queue->rx_cons_lock, flags); in xennet_set_rx_rsp_cons()
852 queue->rx.rsp_cons = val; in xennet_set_rx_rsp_cons()
853 queue->rx_rsp_unconsumed = RING_HAS_UNCONSUMED_RESPONSES(&queue->rx); in xennet_set_rx_rsp_cons()
854 spin_unlock_irqrestore(&queue->rx_cons_lock, flags); in xennet_set_rx_rsp_cons()
860 int new = xennet_rxidx(queue->rx.req_prod_pvt); in xennet_move_rx_slot()
862 BUG_ON(queue->rx_skbs[new]); in xennet_move_rx_slot()
863 queue->rx_skbs[new] = skb; in xennet_move_rx_slot()
864 queue->grant_rx_ref[new] = ref; in xennet_move_rx_slot()
865 RING_GET_REQUEST(&queue->rx, queue->rx.req_prod_pvt)->id = new; in xennet_move_rx_slot()
866 RING_GET_REQUEST(&queue->rx, queue->rx.req_prod_pvt)->gref = ref; in xennet_move_rx_slot()
867 queue->rx.req_prod_pvt++; in xennet_move_rx_slot()
876 struct device *dev = &queue->info->netdev->dev; in xennet_get_extras()
877 RING_IDX cons = queue->rx.rsp_cons; in xennet_get_extras()
887 err = -EBADR; in xennet_get_extras()
891 RING_COPY_RESPONSE(&queue->rx, ++cons, &extra); in xennet_get_extras()
898 err = -EINVAL; in xennet_get_extras()
900 extras[extra.type - 1] = extra; in xennet_get_extras()
917 u32 len = rx->status; in xennet_run_xdp()
921 xdp->data_hard_start = page_address(pdata); in xennet_run_xdp()
922 xdp->data = xdp->data_hard_start + XDP_PACKET_HEADROOM; in xennet_run_xdp()
924 xdp->data_end = xdp->data + len; in xennet_run_xdp()
925 xdp->rxq = &queue->xdp_rxq; in xennet_run_xdp()
926 xdp->frame_sz = XEN_PAGE_SIZE - XDP_PACKET_HEADROOM; in xennet_run_xdp()
933 err = xennet_xdp_xmit(queue->info->netdev, 1, &xdpf, 0); in xennet_run_xdp()
935 trace_xdp_exception(queue->info->netdev, prog, act); in xennet_run_xdp()
939 err = xdp_do_redirect(queue->info->netdev, xdp, prog); in xennet_run_xdp()
942 trace_xdp_exception(queue->info->netdev, prog, act); in xennet_run_xdp()
949 trace_xdp_exception(queue->info->netdev, prog, act); in xennet_run_xdp()
964 struct xen_netif_rx_response *rx = &rinfo->rx, rx_local; in xennet_get_responses()
965 int max = XEN_NETIF_NR_SLOTS_MIN + (rx->status <= RX_COPY_THRESHOLD); in xennet_get_responses()
966 RING_IDX cons = queue->rx.rsp_cons; in xennet_get_responses()
968 struct xen_netif_extra_info *extras = rinfo->extras; in xennet_get_responses()
970 struct device *dev = &queue->info->netdev->dev; in xennet_get_responses()
978 if (rx->flags & XEN_NETRXF_extra_info) { in xennet_get_responses()
981 if (extras[XEN_NETIF_EXTRA_TYPE_XDP - 1].type) { in xennet_get_responses()
984 xdp = &extras[XEN_NETIF_EXTRA_TYPE_XDP - 1]; in xennet_get_responses()
985 rx->offset = xdp->u.xdp.headroom; in xennet_get_responses()
988 cons = queue->rx.rsp_cons; in xennet_get_responses()
992 if (unlikely(rx->status < 0 || in xennet_get_responses()
993 rx->offset + rx->status > XEN_PAGE_SIZE)) { in xennet_get_responses()
995 dev_warn(dev, "rx->offset: %u, size: %d\n", in xennet_get_responses()
996 rx->offset, rx->status); in xennet_get_responses()
998 err = -EINVAL; in xennet_get_responses()
1005 * situation to the system controller to reboot the backend. in xennet_get_responses()
1010 rx->id); in xennet_get_responses()
1011 err = -EINVAL; in xennet_get_responses()
1018 gnttab_release_grant_reference(&queue->gref_rx_head, ref); in xennet_get_responses()
1021 xdp_prog = rcu_dereference(queue->xdp_prog); in xennet_get_responses()
1023 if (!(rx->flags & XEN_NETRXF_more_data)) { in xennet_get_responses()
1026 skb_frag_page(&skb_shinfo(skb)->frags[0]), in xennet_get_responses()
1029 err = -EINVAL; in xennet_get_responses()
1032 err = -EINVAL; in xennet_get_responses()
1038 if (!(rx->flags & XEN_NETRXF_more_data)) in xennet_get_responses()
1044 err = -ENOENT; in xennet_get_responses()
1048 RING_COPY_RESPONSE(&queue->rx, cons + slots, &rx_local); in xennet_get_responses()
1058 err = -E2BIG; in xennet_get_responses()
1070 if (!gso->u.gso.size) { in xennet_set_skb_gso()
1073 return -EINVAL; in xennet_set_skb_gso()
1076 if (gso->u.gso.type != XEN_NETIF_GSO_TYPE_TCPV4 && in xennet_set_skb_gso()
1077 gso->u.gso.type != XEN_NETIF_GSO_TYPE_TCPV6) { in xennet_set_skb_gso()
1079 pr_warn("Bad GSO type %d\n", gso->u.gso.type); in xennet_set_skb_gso()
1080 return -EINVAL; in xennet_set_skb_gso()
1083 skb_shinfo(skb)->gso_size = gso->u.gso.size; in xennet_set_skb_gso()
1084 skb_shinfo(skb)->gso_type = in xennet_set_skb_gso()
1085 (gso->u.gso.type == XEN_NETIF_GSO_TYPE_TCPV4) ? in xennet_set_skb_gso()
1090 skb_shinfo(skb)->gso_type |= SKB_GSO_DODGY; in xennet_set_skb_gso()
1091 skb_shinfo(skb)->gso_segs = 0; in xennet_set_skb_gso()
1100 RING_IDX cons = queue->rx.rsp_cons; in xennet_fill_frags()
1105 skb_frag_t *nfrag = &skb_shinfo(nskb)->frags[0]; in xennet_fill_frags()
1107 RING_COPY_RESPONSE(&queue->rx, ++cons, &rx); in xennet_fill_frags()
1109 if (skb_shinfo(skb)->nr_frags == MAX_SKB_FRAGS) { in xennet_fill_frags()
1110 unsigned int pull_to = NETFRONT_SKB_CB(skb)->pull_to; in xennet_fill_frags()
1113 __pskb_pull_tail(skb, pull_to - skb_headlen(skb)); in xennet_fill_frags()
1115 if (unlikely(skb_shinfo(skb)->nr_frags >= MAX_SKB_FRAGS)) { in xennet_fill_frags()
1119 return -ENOENT; in xennet_fill_frags()
1122 skb_add_rx_frag(skb, skb_shinfo(skb)->nr_frags, in xennet_fill_frags()
1126 skb_shinfo(nskb)->nr_frags = 0; in xennet_fill_frags()
1141 * peers can fail to set NETRXF_csum_blank when sending a GSO in checksum_setup()
1142 * frame. In this case force the SKB to CHECKSUM_PARTIAL and in checksum_setup()
1145 if (skb->ip_summed != CHECKSUM_PARTIAL && skb_is_gso(skb)) { in checksum_setup()
1147 atomic_inc(&np->rx_gso_checksum_fixup); in checksum_setup()
1148 skb->ip_summed = CHECKSUM_PARTIAL; in checksum_setup()
1152 /* A non-CHECKSUM_PARTIAL SKB does not require setup. */ in checksum_setup()
1153 if (skb->ip_summed != CHECKSUM_PARTIAL) in checksum_setup()
1162 struct netfront_stats *rx_stats = this_cpu_ptr(queue->info->rx_stats); in handle_incoming_queue()
1167 int pull_to = NETFRONT_SKB_CB(skb)->pull_to; in handle_incoming_queue()
1170 __pskb_pull_tail(skb, pull_to - skb_headlen(skb)); in handle_incoming_queue()
1172 /* Ethernet work: Delayed to here as it peeks the header. */ in handle_incoming_queue()
1173 skb->protocol = eth_type_trans(skb, queue->info->netdev); in handle_incoming_queue()
1176 if (checksum_setup(queue->info->netdev, skb)) { in handle_incoming_queue()
1179 queue->info->netdev->stats.rx_errors++; in handle_incoming_queue()
1183 u64_stats_update_begin(&rx_stats->syncp); in handle_incoming_queue()
1184 rx_stats->packets++; in handle_incoming_queue()
1185 rx_stats->bytes += skb->len; in handle_incoming_queue()
1186 u64_stats_update_end(&rx_stats->syncp); in handle_incoming_queue()
1189 napi_gro_receive(&queue->napi, skb); in handle_incoming_queue()
1198 struct net_device *dev = queue->info->netdev; in xennet_poll()
1211 spin_lock(&queue->rx_lock); in xennet_poll()
1217 rp = queue->rx.sring->rsp_prod; in xennet_poll()
1218 if (RING_RESPONSE_PROD_OVERFLOW(&queue->rx, rp)) { in xennet_poll()
1219 dev_alert(&dev->dev, "Illegal number of responses %u\n", in xennet_poll()
1220 rp - queue->rx.rsp_cons); in xennet_poll()
1221 queue->info->broken = true; in xennet_poll()
1222 spin_unlock(&queue->rx_lock); in xennet_poll()
1225 rmb(); /* Ensure we see queued responses up to 'rp'. */ in xennet_poll()
1227 i = queue->rx.rsp_cons; in xennet_poll()
1230 RING_COPY_RESPONSE(&queue->rx, i, rx); in xennet_poll()
1240 dev->stats.rx_errors++; in xennet_poll()
1241 i = queue->rx.rsp_cons; in xennet_poll()
1247 if (extras[XEN_NETIF_EXTRA_TYPE_GSO - 1].type) { in xennet_poll()
1249 gso = &extras[XEN_NETIF_EXTRA_TYPE_GSO - 1]; in xennet_poll()
1254 queue->rx.rsp_cons + in xennet_poll()
1260 NETFRONT_SKB_CB(skb)->pull_to = rx->status; in xennet_poll()
1261 if (NETFRONT_SKB_CB(skb)->pull_to > RX_COPY_THRESHOLD) in xennet_poll()
1262 NETFRONT_SKB_CB(skb)->pull_to = RX_COPY_THRESHOLD; in xennet_poll()
1264 skb_frag_off_set(&skb_shinfo(skb)->frags[0], rx->offset); in xennet_poll()
1265 skb_frag_size_set(&skb_shinfo(skb)->frags[0], rx->status); in xennet_poll()
1266 skb->data_len = rx->status; in xennet_poll()
1267 skb->len += rx->status; in xennet_poll()
1272 if (rx->flags & XEN_NETRXF_csum_blank) in xennet_poll()
1273 skb->ip_summed = CHECKSUM_PARTIAL; in xennet_poll()
1274 else if (rx->flags & XEN_NETRXF_data_validated) in xennet_poll()
1275 skb->ip_summed = CHECKSUM_UNNECESSARY; in xennet_poll()
1279 i = queue->rx.rsp_cons + 1; in xennet_poll()
1288 work_done -= handle_incoming_queue(queue, &rxq); in xennet_poll()
1297 RING_FINAL_CHECK_FOR_RESPONSES(&queue->rx, more_to_do); in xennet_poll()
1302 spin_unlock(&queue->rx_lock); in xennet_poll()
1312 return -EINVAL; in xennet_change_mtu()
1313 dev->mtu = mtu; in xennet_change_mtu()
1324 struct netfront_stats *rx_stats = per_cpu_ptr(np->rx_stats, cpu); in xennet_get_stats64()
1325 struct netfront_stats *tx_stats = per_cpu_ptr(np->tx_stats, cpu); in xennet_get_stats64()
1330 start = u64_stats_fetch_begin_irq(&tx_stats->syncp); in xennet_get_stats64()
1331 tx_packets = tx_stats->packets; in xennet_get_stats64()
1332 tx_bytes = tx_stats->bytes; in xennet_get_stats64()
1333 } while (u64_stats_fetch_retry_irq(&tx_stats->syncp, start)); in xennet_get_stats64()
1336 start = u64_stats_fetch_begin_irq(&rx_stats->syncp); in xennet_get_stats64()
1337 rx_packets = rx_stats->packets; in xennet_get_stats64()
1338 rx_bytes = rx_stats->bytes; in xennet_get_stats64()
1339 } while (u64_stats_fetch_retry_irq(&rx_stats->syncp, start)); in xennet_get_stats64()
1341 tot->rx_packets += rx_packets; in xennet_get_stats64()
1342 tot->tx_packets += tx_packets; in xennet_get_stats64()
1343 tot->rx_bytes += rx_bytes; in xennet_get_stats64()
1344 tot->tx_bytes += tx_bytes; in xennet_get_stats64()
1347 tot->rx_errors = dev->stats.rx_errors; in xennet_get_stats64()
1348 tot->tx_dropped = dev->stats.tx_dropped; in xennet_get_stats64()
1358 if (!queue->tx_skbs[i]) in xennet_release_tx_bufs()
1361 skb = queue->tx_skbs[i]; in xennet_release_tx_bufs()
1362 queue->tx_skbs[i] = NULL; in xennet_release_tx_bufs()
1363 get_page(queue->grant_tx_page[i]); in xennet_release_tx_bufs()
1364 gnttab_end_foreign_access(queue->grant_tx_ref[i], in xennet_release_tx_bufs()
1366 (unsigned long)page_address(queue->grant_tx_page[i])); in xennet_release_tx_bufs()
1367 queue->grant_tx_page[i] = NULL; in xennet_release_tx_bufs()
1368 queue->grant_tx_ref[i] = GRANT_INVALID_REF; in xennet_release_tx_bufs()
1369 add_id_to_list(&queue->tx_skb_freelist, queue->tx_link, i); in xennet_release_tx_bufs()
1378 spin_lock_bh(&queue->rx_lock); in xennet_release_rx_bufs()
1384 skb = queue->rx_skbs[id]; in xennet_release_rx_bufs()
1388 ref = queue->grant_rx_ref[id]; in xennet_release_rx_bufs()
1392 page = skb_frag_page(&skb_shinfo(skb)->frags[0]); in xennet_release_rx_bufs()
1400 queue->grant_rx_ref[id] = GRANT_INVALID_REF; in xennet_release_rx_bufs()
1405 spin_unlock_bh(&queue->rx_lock); in xennet_release_rx_bufs()
1414 !xenbus_read_unsigned(np->xbdev->otherend, "feature-sg", 0)) in xennet_fix_features()
1418 !xenbus_read_unsigned(np->xbdev->otherend, in xennet_fix_features()
1419 "feature-ipv6-csum-offload", 0)) in xennet_fix_features()
1423 !xenbus_read_unsigned(np->xbdev->otherend, "feature-gso-tcpv4", 0)) in xennet_fix_features()
1427 !xenbus_read_unsigned(np->xbdev->otherend, "feature-gso-tcpv6", 0)) in xennet_fix_features()
1436 if (!(features & NETIF_F_SG) && dev->mtu > ETH_DATA_LEN) { in xennet_set_features()
1438 dev->mtu = ETH_DATA_LEN; in xennet_set_features()
1448 if (unlikely(queue->info->broken)) in xennet_handle_tx()
1451 spin_lock_irqsave(&queue->tx_lock, flags); in xennet_handle_tx()
1454 spin_unlock_irqrestore(&queue->tx_lock, flags); in xennet_handle_tx()
1474 if (unlikely(queue->info->broken)) in xennet_handle_rx()
1477 spin_lock_irqsave(&queue->rx_cons_lock, flags); in xennet_handle_rx()
1478 work_queued = RING_HAS_UNCONSUMED_RESPONSES(&queue->rx); in xennet_handle_rx()
1479 if (work_queued > queue->rx_rsp_unconsumed) { in xennet_handle_rx()
1480 queue->rx_rsp_unconsumed = work_queued; in xennet_handle_rx()
1482 } else if (unlikely(work_queued < queue->rx_rsp_unconsumed)) { in xennet_handle_rx()
1483 const struct device *dev = &queue->info->netdev->dev; in xennet_handle_rx()
1485 spin_unlock_irqrestore(&queue->rx_cons_lock, flags); in xennet_handle_rx()
1487 dev_alert(dev, "Disabled for further use\n"); in xennet_handle_rx()
1488 queue->info->broken = true; in xennet_handle_rx()
1491 spin_unlock_irqrestore(&queue->rx_cons_lock, flags); in xennet_handle_rx()
1493 if (likely(netif_carrier_ok(queue->info->netdev) && work_queued)) in xennet_handle_rx()
1494 napi_schedule(&queue->napi); in xennet_handle_rx()
1525 unsigned int num_queues = dev->real_num_tx_queues; in xennet_poll_controller()
1528 if (info->broken) in xennet_poll_controller()
1532 xennet_interrupt(0, &info->queues[i]); in xennet_poll_controller()
1545 err = xenbus_printf(XBT_NIL, np->xbdev->nodename, in talk_to_netback_xdp()
1546 "xdp-headroom", "%hu", in talk_to_netback_xdp()
1549 pr_warn("Error writing xdp-headroom\n"); in talk_to_netback_xdp()
1557 unsigned long max_mtu = XEN_PAGE_SIZE - XDP_PACKET_HEADROOM; in xennet_xdp_set()
1562 if (dev->mtu > max_mtu) { in xennet_xdp_set()
1564 return -EINVAL; in xennet_xdp_set()
1567 if (!np->netback_has_xdp_headroom) in xennet_xdp_set()
1570 xenbus_switch_state(np->xbdev, XenbusStateReconfiguring); in xennet_xdp_set()
1579 xenbus_read_driver_state(np->xbdev->otherend) == in xennet_xdp_set()
1581 np->netfront_xdp_enabled = true; in xennet_xdp_set()
1583 old_prog = rtnl_dereference(np->queues[0].xdp_prog); in xennet_xdp_set()
1586 bpf_prog_add(prog, dev->real_num_tx_queues); in xennet_xdp_set()
1588 for (i = 0; i < dev->real_num_tx_queues; ++i) in xennet_xdp_set()
1589 rcu_assign_pointer(np->queues[i].xdp_prog, prog); in xennet_xdp_set()
1592 for (i = 0; i < dev->real_num_tx_queues; ++i) in xennet_xdp_set()
1595 xenbus_switch_state(np->xbdev, XenbusStateConnected); in xennet_xdp_set()
1604 if (np->broken) in xennet_xdp()
1605 return -ENODEV; in xennet_xdp()
1607 switch (xdp->command) { in xennet_xdp()
1609 return xennet_xdp_set(dev, xdp->prog, xdp->extack); in xennet_xdp()
1611 return -EINVAL; in xennet_xdp()
1637 free_percpu(np->rx_stats); in xennet_free_netdev()
1638 free_percpu(np->tx_stats); in xennet_free_netdev()
1650 return ERR_PTR(-ENOMEM); in xennet_create_dev()
1653 np->xbdev = dev; in xennet_create_dev()
1655 np->queues = NULL; in xennet_create_dev()
1657 err = -ENOMEM; in xennet_create_dev()
1658 np->rx_stats = netdev_alloc_pcpu_stats(struct netfront_stats); in xennet_create_dev()
1659 if (np->rx_stats == NULL) in xennet_create_dev()
1661 np->tx_stats = netdev_alloc_pcpu_stats(struct netfront_stats); in xennet_create_dev()
1662 if (np->tx_stats == NULL) in xennet_create_dev()
1665 netdev->netdev_ops = &xennet_netdev_ops; in xennet_create_dev()
1667 netdev->features = NETIF_F_IP_CSUM | NETIF_F_RXCSUM | in xennet_create_dev()
1669 netdev->hw_features = NETIF_F_SG | in xennet_create_dev()
1675 * will be adjusted by the call to netdev_update_features() in in xennet_create_dev()
1679 netdev->features |= netdev->hw_features; in xennet_create_dev()
1681 netdev->ethtool_ops = &xennet_ethtool_ops; in xennet_create_dev()
1682 netdev->min_mtu = ETH_MIN_MTU; in xennet_create_dev()
1683 netdev->max_mtu = XEN_NETIF_MAX_TX_SIZE; in xennet_create_dev()
1684 SET_NETDEV_DEV(netdev, &dev->dev); in xennet_create_dev()
1686 np->netdev = netdev; in xennet_create_dev()
1687 np->netfront_xdp_enabled = false; in xennet_create_dev()
1694 xenbus_read_driver_state(dev->otherend) != in xennet_create_dev()
1696 xenbus_read_driver_state(dev->otherend) != in xennet_create_dev()
1708 * Entry point to this code when a new device is created. Allocate the basic
1727 dev_set_drvdata(&dev->dev, info); in netfront_probe()
1729 info->netdev->sysfs_groups[0] = &xennet_dev_group; in netfront_probe()
1737 /* This frees the page as a side-effect */ in xennet_end_access()
1745 unsigned int num_queues = info->netdev->real_num_tx_queues; in xennet_disconnect_backend()
1747 netif_carrier_off(info->netdev); in xennet_disconnect_backend()
1749 for (i = 0; i < num_queues && info->queues; ++i) { in xennet_disconnect_backend()
1750 struct netfront_queue *queue = &info->queues[i]; in xennet_disconnect_backend()
1752 del_timer_sync(&queue->rx_refill_timer); in xennet_disconnect_backend()
1754 if (queue->tx_irq && (queue->tx_irq == queue->rx_irq)) in xennet_disconnect_backend()
1755 unbind_from_irqhandler(queue->tx_irq, queue); in xennet_disconnect_backend()
1756 if (queue->tx_irq && (queue->tx_irq != queue->rx_irq)) { in xennet_disconnect_backend()
1757 unbind_from_irqhandler(queue->tx_irq, queue); in xennet_disconnect_backend()
1758 unbind_from_irqhandler(queue->rx_irq, queue); in xennet_disconnect_backend()
1760 queue->tx_evtchn = queue->rx_evtchn = 0; in xennet_disconnect_backend()
1761 queue->tx_irq = queue->rx_irq = 0; in xennet_disconnect_backend()
1763 if (netif_running(info->netdev)) in xennet_disconnect_backend()
1764 napi_synchronize(&queue->napi); in xennet_disconnect_backend()
1768 gnttab_free_grant_references(queue->gref_tx_head); in xennet_disconnect_backend()
1769 gnttab_free_grant_references(queue->gref_rx_head); in xennet_disconnect_backend()
1772 xennet_end_access(queue->tx_ring_ref, queue->tx.sring); in xennet_disconnect_backend()
1773 xennet_end_access(queue->rx_ring_ref, queue->rx.sring); in xennet_disconnect_backend()
1775 queue->tx_ring_ref = GRANT_INVALID_REF; in xennet_disconnect_backend()
1776 queue->rx_ring_ref = GRANT_INVALID_REF; in xennet_disconnect_backend()
1777 queue->tx.sring = NULL; in xennet_disconnect_backend()
1778 queue->rx.sring = NULL; in xennet_disconnect_backend()
1780 page_pool_destroy(queue->page_pool); in xennet_disconnect_backend()
1785 * We are reconnecting to the backend, due to a suspend/resume, or a backend
1787 * leave the device-layer structures intact so that this is transparent to the
1792 struct netfront_info *info = dev_get_drvdata(&dev->dev); in netfront_resume()
1794 dev_dbg(&dev->dev, "%s\n", dev->nodename); in netfront_resume()
1796 netif_tx_lock_bh(info->netdev); in netfront_resume()
1797 netif_device_detach(info->netdev); in netfront_resume()
1798 netif_tx_unlock_bh(info->netdev); in netfront_resume()
1809 macstr = s = xenbus_read(XBT_NIL, dev->nodename, "mac", NULL); in xen_net_read_mac()
1815 if ((s == e) || (*e != ((i == ETH_ALEN-1) ? '\0' : ':'))) { in xen_net_read_mac()
1817 return -ENOENT; in xen_net_read_mac()
1830 err = xenbus_alloc_evtchn(queue->info->xbdev, &queue->tx_evtchn); in setup_netfront_single()
1834 err = bind_evtchn_to_irqhandler_lateeoi(queue->tx_evtchn, in setup_netfront_single()
1836 queue->info->netdev->name, in setup_netfront_single()
1840 queue->rx_evtchn = queue->tx_evtchn; in setup_netfront_single()
1841 queue->rx_irq = queue->tx_irq = err; in setup_netfront_single()
1846 xenbus_free_evtchn(queue->info->xbdev, queue->tx_evtchn); in setup_netfront_single()
1847 queue->tx_evtchn = 0; in setup_netfront_single()
1856 err = xenbus_alloc_evtchn(queue->info->xbdev, &queue->tx_evtchn); in setup_netfront_split()
1859 err = xenbus_alloc_evtchn(queue->info->xbdev, &queue->rx_evtchn); in setup_netfront_split()
1863 snprintf(queue->tx_irq_name, sizeof(queue->tx_irq_name), in setup_netfront_split()
1864 "%s-tx", queue->name); in setup_netfront_split()
1865 err = bind_evtchn_to_irqhandler_lateeoi(queue->tx_evtchn, in setup_netfront_split()
1867 queue->tx_irq_name, queue); in setup_netfront_split()
1870 queue->tx_irq = err; in setup_netfront_split()
1872 snprintf(queue->rx_irq_name, sizeof(queue->rx_irq_name), in setup_netfront_split()
1873 "%s-rx", queue->name); in setup_netfront_split()
1874 err = bind_evtchn_to_irqhandler_lateeoi(queue->rx_evtchn, in setup_netfront_split()
1876 queue->rx_irq_name, queue); in setup_netfront_split()
1879 queue->rx_irq = err; in setup_netfront_split()
1884 unbind_from_irqhandler(queue->tx_irq, queue); in setup_netfront_split()
1885 queue->tx_irq = 0; in setup_netfront_split()
1887 xenbus_free_evtchn(queue->info->xbdev, queue->rx_evtchn); in setup_netfront_split()
1888 queue->rx_evtchn = 0; in setup_netfront_split()
1890 xenbus_free_evtchn(queue->info->xbdev, queue->tx_evtchn); in setup_netfront_split()
1891 queue->tx_evtchn = 0; in setup_netfront_split()
1904 queue->tx_ring_ref = GRANT_INVALID_REF; in setup_netfront()
1905 queue->rx_ring_ref = GRANT_INVALID_REF; in setup_netfront()
1906 queue->rx.sring = NULL; in setup_netfront()
1907 queue->tx.sring = NULL; in setup_netfront()
1911 err = -ENOMEM; in setup_netfront()
1912 xenbus_dev_fatal(dev, err, "allocating tx ring page"); in setup_netfront()
1916 FRONT_RING_INIT(&queue->tx, txs, XEN_PAGE_SIZE); in setup_netfront()
1921 queue->tx_ring_ref = gref; in setup_netfront()
1925 err = -ENOMEM; in setup_netfront()
1930 FRONT_RING_INIT(&queue->rx, rxs, XEN_PAGE_SIZE); in setup_netfront()
1935 queue->rx_ring_ref = gref; in setup_netfront()
1940 * a) feature-split-event-channels == 0 in setup_netfront()
1941 * b) feature-split-event-channels == 1 but failed to setup in setup_netfront()
1951 /* If we fail to setup netfront, it is safe to just revoke access to in setup_netfront()
1955 gnttab_end_foreign_access_ref(queue->rx_ring_ref, 0); in setup_netfront()
1959 gnttab_end_foreign_access_ref(queue->tx_ring_ref, 0); in setup_netfront()
1966 /* Queue-specific initialisation
1967 * This used to be done in xennet_create_dev() but must now
1968 * be run per-queue.
1976 spin_lock_init(&queue->tx_lock); in xennet_init_queue()
1977 spin_lock_init(&queue->rx_lock); in xennet_init_queue()
1978 spin_lock_init(&queue->rx_cons_lock); in xennet_init_queue()
1980 timer_setup(&queue->rx_refill_timer, rx_refill_timeout, 0); in xennet_init_queue()
1982 devid = strrchr(queue->info->xbdev->nodename, '/') + 1; in xennet_init_queue()
1983 snprintf(queue->name, sizeof(queue->name), "vif%s-q%u", in xennet_init_queue()
1984 devid, queue->id); in xennet_init_queue()
1987 queue->tx_skb_freelist = 0; in xennet_init_queue()
1988 queue->tx_pend_queue = TX_LINK_NONE; in xennet_init_queue()
1990 queue->tx_link[i] = i + 1; in xennet_init_queue()
1991 queue->grant_tx_ref[i] = GRANT_INVALID_REF; in xennet_init_queue()
1992 queue->grant_tx_page[i] = NULL; in xennet_init_queue()
1994 queue->tx_link[NET_TX_RING_SIZE - 1] = TX_LINK_NONE; in xennet_init_queue()
1998 queue->rx_skbs[i] = NULL; in xennet_init_queue()
1999 queue->grant_rx_ref[i] = GRANT_INVALID_REF; in xennet_init_queue()
2002 /* A grant for every tx ring slot */ in xennet_init_queue()
2004 &queue->gref_tx_head) < 0) { in xennet_init_queue()
2005 pr_alert("can't alloc tx grant refs\n"); in xennet_init_queue()
2006 err = -ENOMEM; in xennet_init_queue()
2012 &queue->gref_rx_head) < 0) { in xennet_init_queue()
2014 err = -ENOMEM; in xennet_init_queue()
2021 gnttab_free_grant_references(queue->gref_tx_head); in xennet_init_queue()
2029 /* Write the queue-specific keys into XenStore in the traditional in write_queue_xenstore_keys()
2031 * queues. in write_queue_xenstore_keys()
2033 struct xenbus_device *dev = queue->info->xbdev; in write_queue_xenstore_keys()
2039 /* Choose the correct place to write the keys */ in write_queue_xenstore_keys()
2041 pathsize = strlen(dev->nodename) + 10; in write_queue_xenstore_keys()
2044 err = -ENOMEM; in write_queue_xenstore_keys()
2048 snprintf(path, pathsize, "%s/queue-%u", in write_queue_xenstore_keys()
2049 dev->nodename, queue->id); in write_queue_xenstore_keys()
2051 path = (char *)dev->nodename; in write_queue_xenstore_keys()
2055 err = xenbus_printf(*xbt, path, "tx-ring-ref", "%u", in write_queue_xenstore_keys()
2056 queue->tx_ring_ref); in write_queue_xenstore_keys()
2058 message = "writing tx-ring-ref"; in write_queue_xenstore_keys()
2062 err = xenbus_printf(*xbt, path, "rx-ring-ref", "%u", in write_queue_xenstore_keys()
2063 queue->rx_ring_ref); in write_queue_xenstore_keys()
2065 message = "writing rx-ring-ref"; in write_queue_xenstore_keys()
2072 if (queue->tx_evtchn == queue->rx_evtchn) { in write_queue_xenstore_keys()
2075 "event-channel", "%u", queue->tx_evtchn); in write_queue_xenstore_keys()
2077 message = "writing event-channel"; in write_queue_xenstore_keys()
2083 "event-channel-tx", "%u", queue->tx_evtchn); in write_queue_xenstore_keys()
2085 message = "writing event-channel-tx"; in write_queue_xenstore_keys()
2090 "event-channel-rx", "%u", queue->rx_evtchn); in write_queue_xenstore_keys()
2092 message = "writing event-channel-rx"; in write_queue_xenstore_keys()
2112 for (i = 0; i < info->netdev->real_num_tx_queues; i++) { in xennet_destroy_queues()
2113 struct netfront_queue *queue = &info->queues[i]; in xennet_destroy_queues()
2115 if (netif_running(info->netdev)) in xennet_destroy_queues()
2116 napi_disable(&queue->napi); in xennet_destroy_queues()
2117 netif_napi_del(&queue->napi); in xennet_destroy_queues()
2120 kfree(info->queues); in xennet_destroy_queues()
2121 info->queues = NULL; in xennet_destroy_queues()
2134 .dev = &queue->info->netdev->dev, in xennet_create_page_pool()
2136 .max_len = XEN_PAGE_SIZE - XDP_PACKET_HEADROOM, in xennet_create_page_pool()
2139 queue->page_pool = page_pool_create(&pp_params); in xennet_create_page_pool()
2140 if (IS_ERR(queue->page_pool)) { in xennet_create_page_pool()
2141 err = PTR_ERR(queue->page_pool); in xennet_create_page_pool()
2142 queue->page_pool = NULL; in xennet_create_page_pool()
2146 err = xdp_rxq_info_reg(&queue->xdp_rxq, queue->info->netdev, in xennet_create_page_pool()
2147 queue->id); in xennet_create_page_pool()
2149 netdev_err(queue->info->netdev, "xdp_rxq_info_reg failed\n"); in xennet_create_page_pool()
2153 err = xdp_rxq_info_reg_mem_model(&queue->xdp_rxq, in xennet_create_page_pool()
2154 MEM_TYPE_PAGE_POOL, queue->page_pool); in xennet_create_page_pool()
2156 netdev_err(queue->info->netdev, "xdp_rxq_info_reg_mem_model failed\n"); in xennet_create_page_pool()
2162 xdp_rxq_info_unreg(&queue->xdp_rxq); in xennet_create_page_pool()
2164 page_pool_destroy(queue->page_pool); in xennet_create_page_pool()
2165 queue->page_pool = NULL; in xennet_create_page_pool()
2175 info->queues = kcalloc(*num_queues, sizeof(struct netfront_queue), in xennet_create_queues()
2177 if (!info->queues) in xennet_create_queues()
2178 return -ENOMEM; in xennet_create_queues()
2181 struct netfront_queue *queue = &info->queues[i]; in xennet_create_queues()
2183 queue->id = i; in xennet_create_queues()
2184 queue->info = info; in xennet_create_queues()
2188 dev_warn(&info->xbdev->dev, in xennet_create_queues()
2189 "only created %d queues\n", i); in xennet_create_queues()
2194 /* use page pool recycling instead of buddy allocator */ in xennet_create_queues()
2197 dev_err(&info->xbdev->dev, "can't allocate page pool\n"); in xennet_create_queues()
2202 netif_napi_add(queue->info->netdev, &queue->napi, in xennet_create_queues()
2204 if (netif_running(info->netdev)) in xennet_create_queues()
2205 napi_enable(&queue->napi); in xennet_create_queues()
2208 netif_set_real_num_tx_queues(info->netdev, *num_queues); in xennet_create_queues()
2211 dev_err(&info->xbdev->dev, "no queues\n"); in xennet_create_queues()
2212 return -EINVAL; in xennet_create_queues()
2230 info->netdev->irq = 0; in talk_to_netback()
2232 /* Check if backend supports multiple queues */ in talk_to_netback()
2233 max_queues = xenbus_read_unsigned(info->xbdev->otherend, in talk_to_netback()
2234 "multi-queue-max-queues", 1); in talk_to_netback()
2237 /* Check feature-split-event-channels */ in talk_to_netback()
2238 feature_split_evtchn = xenbus_read_unsigned(info->xbdev->otherend, in talk_to_netback()
2239 "feature-split-event-channels", 0); in talk_to_netback()
2242 err = xen_net_read_mac(dev, info->netdev->dev_addr); in talk_to_netback()
2244 xenbus_dev_fatal(dev, err, "parsing %s/mac", dev->nodename); in talk_to_netback()
2248 info->netback_has_xdp_headroom = xenbus_read_unsigned(info->xbdev->otherend, in talk_to_netback()
2249 "feature-xdp-headroom", 0); in talk_to_netback()
2250 if (info->netback_has_xdp_headroom) { in talk_to_netback()
2251 /* set the current xen-netfront xdp state */ in talk_to_netback()
2252 err = talk_to_netback_xdp(info, info->netfront_xdp_enabled ? in talk_to_netback()
2260 if (info->queues) in talk_to_netback()
2264 info->broken = false; in talk_to_netback()
2268 xenbus_dev_fatal(dev, err, "creating queues"); in talk_to_netback()
2269 kfree(info->queues); in talk_to_netback()
2270 info->queues = NULL; in talk_to_netback()
2275 /* Create shared ring, alloc event channel -- for each queue */ in talk_to_netback()
2277 queue = &info->queues[i]; in talk_to_netback()
2291 info->xbdev->otherend, "multi-queue-max-queues")) { in talk_to_netback()
2292 /* Write the number of queues */ in talk_to_netback()
2293 err = xenbus_printf(xbt, dev->nodename, in talk_to_netback()
2294 "multi-queue-num-queues", "%u", num_queues); in talk_to_netback()
2296 message = "writing multi-queue-num-queues"; in talk_to_netback()
2302 err = write_queue_xenstore_keys(&info->queues[0], &xbt, 0); /* flat */ in talk_to_netback()
2308 queue = &info->queues[i]; in talk_to_netback()
2315 /* The remaining keys are not queue-specific */ in talk_to_netback()
2316 err = xenbus_printf(xbt, dev->nodename, "request-rx-copy", "%u", in talk_to_netback()
2319 message = "writing request-rx-copy"; in talk_to_netback()
2323 err = xenbus_printf(xbt, dev->nodename, "feature-rx-notify", "%d", 1); in talk_to_netback()
2325 message = "writing feature-rx-notify"; in talk_to_netback()
2329 err = xenbus_printf(xbt, dev->nodename, "feature-sg", "%d", 1); in talk_to_netback()
2331 message = "writing feature-sg"; in talk_to_netback()
2335 err = xenbus_printf(xbt, dev->nodename, "feature-gso-tcpv4", "%d", 1); in talk_to_netback()
2337 message = "writing feature-gso-tcpv4"; in talk_to_netback()
2341 err = xenbus_write(xbt, dev->nodename, "feature-gso-tcpv6", "1"); in talk_to_netback()
2343 message = "writing feature-gso-tcpv6"; in talk_to_netback()
2347 err = xenbus_write(xbt, dev->nodename, "feature-ipv6-csum-offload", in talk_to_netback()
2350 message = "writing feature-ipv6-csum-offload"; in talk_to_netback()
2356 if (err == -EAGAIN) in talk_to_netback()
2375 device_unregister(&dev->dev); in talk_to_netback()
2387 if (!xenbus_read_unsigned(np->xbdev->otherend, "feature-rx-copy", 0)) { in xennet_connect()
2388 dev_info(&dev->dev, in xennet_connect()
2390 return -ENODEV; in xennet_connect()
2393 err = talk_to_netback(np->xbdev, np); in xennet_connect()
2396 if (np->netback_has_xdp_headroom) in xennet_connect()
2399 /* talk_to_netback() sets the correct number of queues */ in xennet_connect()
2400 num_queues = dev->real_num_tx_queues; in xennet_connect()
2402 if (dev->reg_state == NETREG_UNINITIALIZED) { in xennet_connect()
2406 device_unregister(&np->xbdev->dev); in xennet_connect()
2417 * ready to start sending and receiving packets and give the driver in xennet_connect()
2421 netif_tx_lock_bh(np->netdev); in xennet_connect()
2422 netif_device_attach(np->netdev); in xennet_connect()
2423 netif_tx_unlock_bh(np->netdev); in xennet_connect()
2425 netif_carrier_on(np->netdev); in xennet_connect()
2427 queue = &np->queues[j]; in xennet_connect()
2429 notify_remote_via_irq(queue->tx_irq); in xennet_connect()
2430 if (queue->tx_irq != queue->rx_irq) in xennet_connect()
2431 notify_remote_via_irq(queue->rx_irq); in xennet_connect()
2433 spin_lock_irq(&queue->tx_lock); in xennet_connect()
2435 spin_unlock_irq(&queue->tx_lock); in xennet_connect()
2437 spin_lock_bh(&queue->rx_lock); in xennet_connect()
2439 spin_unlock_bh(&queue->rx_lock); in xennet_connect()
2451 struct netfront_info *np = dev_get_drvdata(&dev->dev); in netback_changed()
2452 struct net_device *netdev = np->netdev; in netback_changed()
2454 dev_dbg(&dev->dev, "%s\n", xenbus_strstate(backend_state)); in netback_changed()
2467 if (dev->state != XenbusStateInitialising) in netback_changed()
2479 if (dev->state == XenbusStateClosed) in netback_changed()
2504 return -EINVAL; in xennet_get_sset_count()
2556 return -EPERM; in store_rxbuf()
2560 return -EBADMSG; in store_rxbuf()
2587 if (xenbus_read_driver_state(dev->otherend) == XenbusStateClosed) in xennet_bus_close()
2592 xenbus_read_driver_state(dev->otherend) == in xennet_bus_close()
2594 xenbus_read_driver_state(dev->otherend) == in xennet_bus_close()
2596 xenbus_read_driver_state(dev->otherend) == in xennet_bus_close()
2601 if (xenbus_read_driver_state(dev->otherend) == XenbusStateClosed) in xennet_bus_close()
2607 xenbus_read_driver_state(dev->otherend) == in xennet_bus_close()
2609 xenbus_read_driver_state(dev->otherend) == in xennet_bus_close()
2617 struct netfront_info *info = dev_get_drvdata(&dev->dev); in xennet_remove()
2622 if (info->netdev->reg_state == NETREG_REGISTERED) in xennet_remove()
2623 unregister_netdev(info->netdev); in xennet_remove()
2625 if (info->queues) { in xennet_remove()
2630 xennet_free_netdev(info->netdev); in xennet_remove()
2651 return -ENODEV; in netif_init()
2654 return -ENODEV; in netif_init()
2658 /* Allow as many queues as there are CPUs inut max. 8 if user has not in netif_init()