1 /* SPDX-License-Identifier: BSD-3-Clause
2 * Copyright(c) 2016-2018 Microsoft Corporation
3 * Copyright(c) 2013-2016 Brocade Communications Systems, Inc.
15 #include <rte_ethdev.h>
16 #include <rte_memcpy.h>
17 #include <rte_string_fns.h>
18 #include <rte_memzone.h>
19 #include <rte_malloc.h>
20 #include <rte_atomic.h>
21 #include <rte_branch_prediction.h>
22 #include <rte_ether.h>
23 #include <rte_common.h>
24 #include <rte_errno.h>
25 #include <rte_memory.h>
29 #include <rte_bus_vmbus.h>
30 #include <rte_spinlock.h>
38 #define HN_NVS_SEND_MSG_SIZE \
39 (sizeof(struct vmbus_chanpkt_hdr) + sizeof(struct hn_nvs_rndis))
41 #define HN_TXD_CACHE_SIZE 32 /* per cpu tx_descriptor pool cache */
42 #define HN_TXCOPY_THRESHOLD 512
44 #define HN_RXCOPY_THRESHOLD 256
45 #define HN_RXQ_EVENT_DEFAULT 2048
54 #define HN_RXINFO_VLAN 0x0001
55 #define HN_RXINFO_CSUM 0x0002
56 #define HN_RXINFO_HASHINF 0x0004
57 #define HN_RXINFO_HASHVAL 0x0008
58 #define HN_RXINFO_ALL \
64 #define HN_NDIS_VLAN_INFO_INVALID 0xffffffff
65 #define HN_NDIS_RXCSUM_INFO_INVALID 0
66 #define HN_NDIS_HASH_INFO_INVALID 0
69 * Per-transmit book keeping.
70 * A slot in transmit ring (chim_index) is reserved for each transmit.
72 * There are two types of transmit:
73 * - buffered transmit where chimney buffer is used and RNDIS header
74 * is in the buffer. mbuf == NULL for this case.
76 * - direct transmit where RNDIS header is in the in rndis_pkt
77 * mbuf is freed after transmit.
79 * Descriptors come from per-port pool which is used
80 * to limit number of outstanding requests per device.
91 struct rndis_packet_msg *rndis_pkt;
94 #define HN_RNDIS_PKT_LEN \
95 (sizeof(struct rndis_packet_msg) + \
96 RNDIS_PKTINFO_SIZE(NDIS_HASH_VALUE_SIZE) + \
97 RNDIS_PKTINFO_SIZE(NDIS_VLAN_INFO_SIZE) + \
98 RNDIS_PKTINFO_SIZE(NDIS_LSO2_INFO_SIZE) + \
99 RNDIS_PKTINFO_SIZE(NDIS_TXCSUM_INFO_SIZE))
101 /* Minimum space required for a packet */
102 #define HN_PKTSIZE_MIN(align) \
103 RTE_ALIGN(ETHER_MIN_LEN + HN_RNDIS_PKT_LEN, align)
105 #define DEFAULT_TX_FREE_THRESH 32U
108 hn_update_packet_stats(struct hn_stats *stats, const struct rte_mbuf *m)
110 uint32_t s = m->pkt_len;
111 const struct ether_addr *ea;
114 stats->size_bins[1]++;
115 } else if (s > 64 && s < 1024) {
118 /* count zeros, and offset into correct bin */
119 bin = (sizeof(s) * 8) - __builtin_clz(s) - 5;
120 stats->size_bins[bin]++;
123 stats->size_bins[0]++;
125 stats->size_bins[6]++;
127 stats->size_bins[7]++;
130 ea = rte_pktmbuf_mtod(m, const struct ether_addr *);
131 if (is_multicast_ether_addr(ea)) {
132 if (is_broadcast_ether_addr(ea))
139 static inline unsigned int hn_rndis_pktlen(const struct rndis_packet_msg *pkt)
141 return pkt->pktinfooffset + pkt->pktinfolen;
144 static inline uint32_t
145 hn_rndis_pktmsg_offset(uint32_t ofs)
147 return ofs - offsetof(struct rndis_packet_msg, dataoffset);
150 static void hn_txd_init(struct rte_mempool *mp __rte_unused,
151 void *opaque, void *obj, unsigned int idx)
153 struct hn_txdesc *txd = obj;
154 struct rte_eth_dev *dev = opaque;
155 struct rndis_packet_msg *pkt;
157 memset(txd, 0, sizeof(*txd));
158 txd->chim_index = idx;
160 pkt = rte_malloc_socket("RNDIS_TX", HN_RNDIS_PKT_LEN,
161 rte_align32pow2(HN_RNDIS_PKT_LEN),
162 dev->device->numa_node);
164 rte_exit(EXIT_FAILURE, "can not allocate RNDIS header");
166 txd->rndis_pkt = pkt;
170 * Unlike Linux and FreeBSD, this driver uses a mempool
171 * to limit outstanding transmits and reserve buffers
174 hn_tx_pool_init(struct rte_eth_dev *dev)
176 struct hn_data *hv = dev->data->dev_private;
177 char name[RTE_MEMPOOL_NAMESIZE];
178 struct rte_mempool *mp;
180 snprintf(name, sizeof(name),
181 "hn_txd_%u", dev->data->port_id);
183 PMD_INIT_LOG(DEBUG, "create a TX send pool %s n=%u size=%zu socket=%d",
184 name, hv->chim_cnt, sizeof(struct hn_txdesc),
185 dev->device->numa_node);
187 mp = rte_mempool_create(name, hv->chim_cnt, sizeof(struct hn_txdesc),
188 HN_TXD_CACHE_SIZE, 0,
191 dev->device->numa_node, 0);
194 "mempool %s create failed: %d", name, rte_errno);
203 hn_tx_pool_uninit(struct rte_eth_dev *dev)
205 struct hn_data *hv = dev->data->dev_private;
208 rte_mempool_free(hv->tx_pool);
213 static void hn_reset_txagg(struct hn_tx_queue *txq)
215 txq->agg_szleft = txq->agg_szmax;
216 txq->agg_pktleft = txq->agg_pktmax;
218 txq->agg_prevpkt = NULL;
222 hn_dev_tx_queue_setup(struct rte_eth_dev *dev,
223 uint16_t queue_idx, uint16_t nb_desc __rte_unused,
224 unsigned int socket_id,
225 const struct rte_eth_txconf *tx_conf)
228 struct hn_data *hv = dev->data->dev_private;
229 struct hn_tx_queue *txq;
230 uint32_t tx_free_thresh;
233 PMD_INIT_FUNC_TRACE();
235 txq = rte_zmalloc_socket("HN_TXQ", sizeof(*txq), RTE_CACHE_LINE_SIZE,
241 txq->chan = hv->channels[queue_idx];
242 txq->port_id = dev->data->port_id;
243 txq->queue_id = queue_idx;
245 tx_free_thresh = tx_conf->tx_free_thresh;
246 if (tx_free_thresh == 0)
247 tx_free_thresh = RTE_MIN(hv->chim_cnt / 4,
248 DEFAULT_TX_FREE_THRESH);
250 if (tx_free_thresh >= hv->chim_cnt - 3)
251 tx_free_thresh = hv->chim_cnt - 3;
253 txq->free_thresh = tx_free_thresh;
255 txq->agg_szmax = RTE_MIN(hv->chim_szmax, hv->rndis_agg_size);
256 txq->agg_pktmax = hv->rndis_agg_pkts;
257 txq->agg_align = hv->rndis_agg_align;
261 err = hn_vf_tx_queue_setup(dev, queue_idx, nb_desc,
268 dev->data->tx_queues[queue_idx] = txq;
273 hn_dev_tx_queue_release(void *arg)
275 struct hn_tx_queue *txq = arg;
276 struct hn_txdesc *txd;
278 PMD_INIT_FUNC_TRACE();
283 /* If any pending data is still present just drop it */
286 rte_mempool_put(txq->hv->tx_pool, txd);
292 hn_nvs_send_completed(struct rte_eth_dev *dev, uint16_t queue_id,
293 unsigned long xactid, const struct hn_nvs_rndis_ack *ack)
295 struct hn_txdesc *txd = (struct hn_txdesc *)xactid;
296 struct hn_tx_queue *txq;
298 /* Control packets are sent with xacid == 0 */
302 txq = dev->data->tx_queues[queue_id];
303 if (likely(ack->status == NVS_STATUS_OK)) {
304 PMD_TX_LOG(DEBUG, "port %u:%u complete tx %u packets %u bytes %u",
305 txq->port_id, txq->queue_id, txd->chim_index,
306 txd->packets, txd->data_size);
307 txq->stats.bytes += txd->data_size;
308 txq->stats.packets += txd->packets;
310 PMD_TX_LOG(NOTICE, "port %u:%u complete tx %u failed status %u",
311 txq->port_id, txq->queue_id, txd->chim_index, ack->status);
315 rte_pktmbuf_free(txd->m);
317 rte_mempool_put(txq->hv->tx_pool, txd);
320 /* Handle transmit completion events */
322 hn_nvs_handle_comp(struct rte_eth_dev *dev, uint16_t queue_id,
323 const struct vmbus_chanpkt_hdr *pkt,
326 const struct hn_nvs_hdr *hdr = data;
329 case NVS_TYPE_RNDIS_ACK:
330 hn_nvs_send_completed(dev, queue_id, pkt->xactid, data);
335 "unexpected send completion type %u",
340 /* Parse per-packet info (meta data) */
342 hn_rndis_rxinfo(const void *info_data, unsigned int info_dlen,
343 struct hn_rxinfo *info)
345 const struct rndis_pktinfo *pi = info_data;
348 while (info_dlen != 0) {
352 if (unlikely(info_dlen < sizeof(*pi)))
355 if (unlikely(info_dlen < pi->size))
357 info_dlen -= pi->size;
359 if (unlikely(pi->size & RNDIS_PKTINFO_SIZE_ALIGNMASK))
361 if (unlikely(pi->size < pi->offset))
364 dlen = pi->size - pi->offset;
368 case NDIS_PKTINFO_TYPE_VLAN:
369 if (unlikely(dlen < NDIS_VLAN_INFO_SIZE))
371 info->vlan_info = *((const uint32_t *)data);
372 mask |= HN_RXINFO_VLAN;
375 case NDIS_PKTINFO_TYPE_CSUM:
376 if (unlikely(dlen < NDIS_RXCSUM_INFO_SIZE))
378 info->csum_info = *((const uint32_t *)data);
379 mask |= HN_RXINFO_CSUM;
382 case NDIS_PKTINFO_TYPE_HASHVAL:
383 if (unlikely(dlen < NDIS_HASH_VALUE_SIZE))
385 info->hash_value = *((const uint32_t *)data);
386 mask |= HN_RXINFO_HASHVAL;
389 case NDIS_PKTINFO_TYPE_HASHINF:
390 if (unlikely(dlen < NDIS_HASH_INFO_SIZE))
392 info->hash_info = *((const uint32_t *)data);
393 mask |= HN_RXINFO_HASHINF;
400 if (mask == HN_RXINFO_ALL)
401 break; /* All found; done */
403 pi = (const struct rndis_pktinfo *)
404 ((const uint8_t *)pi + pi->size);
409 * - If there is no hash value, invalidate the hash info.
411 if (!(mask & HN_RXINFO_HASHVAL))
412 info->hash_info = HN_NDIS_HASH_INFO_INVALID;
417 * Ack the consumed RXBUF associated w/ this channel packet,
418 * so that this RXBUF can be recycled by the hypervisor.
420 static void hn_rx_buf_release(struct hn_rx_bufinfo *rxb)
422 struct rte_mbuf_ext_shared_info *shinfo = &rxb->shinfo;
423 struct hn_data *hv = rxb->hv;
425 if (rte_mbuf_ext_refcnt_update(shinfo, -1) == 0) {
426 hn_nvs_ack_rxbuf(rxb->chan, rxb->xactid);
427 --hv->rxbuf_outstanding;
431 static void hn_rx_buf_free_cb(void *buf __rte_unused, void *opaque)
433 hn_rx_buf_release(opaque);
436 static struct hn_rx_bufinfo *hn_rx_buf_init(const struct hn_rx_queue *rxq,
437 const struct vmbus_chanpkt_rxbuf *pkt)
439 struct hn_rx_bufinfo *rxb;
441 rxb = rxq->hv->rxbuf_info + pkt->hdr.xactid;
442 rxb->chan = rxq->chan;
443 rxb->xactid = pkt->hdr.xactid;
446 rxb->shinfo.free_cb = hn_rx_buf_free_cb;
447 rxb->shinfo.fcb_opaque = rxb;
448 rte_mbuf_ext_refcnt_set(&rxb->shinfo, 1);
452 static void hn_rxpkt(struct hn_rx_queue *rxq, struct hn_rx_bufinfo *rxb,
453 uint8_t *data, unsigned int headroom, unsigned int dlen,
454 const struct hn_rxinfo *info)
456 struct hn_data *hv = rxq->hv;
459 m = rte_pktmbuf_alloc(rxq->mb_pool);
461 struct rte_eth_dev *dev =
462 &rte_eth_devices[rxq->port_id];
464 dev->data->rx_mbuf_alloc_failed++;
469 * For large packets, avoid copy if possible but need to keep
470 * some space available in receive area for later packets.
472 if (dlen >= HN_RXCOPY_THRESHOLD &&
473 hv->rxbuf_outstanding < hv->rxbuf_section_cnt / 2) {
474 struct rte_mbuf_ext_shared_info *shinfo;
479 * Build an external mbuf that points to recveive area.
480 * Use refcount to handle multiple packets in same
481 * receive buffer section.
483 rxbuf = hv->rxbuf_res->addr;
484 iova = rte_mem_virt2iova(rxbuf) + RTE_PTR_DIFF(data, rxbuf);
485 shinfo = &rxb->shinfo;
487 if (rte_mbuf_ext_refcnt_update(shinfo, 1) == 1)
488 ++hv->rxbuf_outstanding;
490 rte_pktmbuf_attach_extbuf(m, data, iova,
491 dlen + headroom, shinfo);
492 m->data_off = headroom;
494 /* Mbuf's in pool must be large enough to hold small packets */
495 if (unlikely(rte_pktmbuf_tailroom(m) < dlen)) {
496 rte_pktmbuf_free_seg(m);
500 rte_memcpy(rte_pktmbuf_mtod(m, void *),
501 data + headroom, dlen);
504 m->port = rxq->port_id;
507 m->packet_type = rte_net_get_ptype(m, NULL,
512 if (info->vlan_info != HN_NDIS_VLAN_INFO_INVALID) {
513 m->vlan_tci = info->vlan_info;
514 m->ol_flags |= PKT_RX_VLAN_STRIPPED | PKT_RX_VLAN;
517 if (info->csum_info != HN_NDIS_RXCSUM_INFO_INVALID) {
518 if (info->csum_info & NDIS_RXCSUM_INFO_IPCS_OK)
519 m->ol_flags |= PKT_RX_IP_CKSUM_GOOD;
521 if (info->csum_info & (NDIS_RXCSUM_INFO_UDPCS_OK
522 | NDIS_RXCSUM_INFO_TCPCS_OK))
523 m->ol_flags |= PKT_RX_L4_CKSUM_GOOD;
524 else if (info->csum_info & (NDIS_RXCSUM_INFO_TCPCS_FAILED
525 | NDIS_RXCSUM_INFO_UDPCS_FAILED))
526 m->ol_flags |= PKT_RX_L4_CKSUM_BAD;
529 if (info->hash_info != HN_NDIS_HASH_INFO_INVALID) {
530 m->ol_flags |= PKT_RX_RSS_HASH;
531 m->hash.rss = info->hash_value;
535 "port %u:%u RX id %"PRIu64" size %u type %#x ol_flags %#"PRIx64,
536 rxq->port_id, rxq->queue_id, rxb->xactid,
537 m->pkt_len, m->packet_type, m->ol_flags);
539 ++rxq->stats.packets;
540 rxq->stats.bytes += m->pkt_len;
541 hn_update_packet_stats(&rxq->stats, m);
543 if (unlikely(rte_ring_sp_enqueue(rxq->rx_ring, m) != 0)) {
544 ++rxq->stats.ring_full;
549 static void hn_rndis_rx_data(struct hn_rx_queue *rxq,
550 struct hn_rx_bufinfo *rxb,
551 void *data, uint32_t dlen)
553 unsigned int data_off, data_len, pktinfo_off, pktinfo_len;
554 const struct rndis_packet_msg *pkt = data;
555 struct hn_rxinfo info = {
556 .vlan_info = HN_NDIS_VLAN_INFO_INVALID,
557 .csum_info = HN_NDIS_RXCSUM_INFO_INVALID,
558 .hash_info = HN_NDIS_HASH_INFO_INVALID,
564 if (unlikely(dlen < sizeof(*pkt)))
567 if (unlikely(dlen < pkt->len))
568 goto error; /* truncated RNDIS from host */
570 if (unlikely(pkt->len < pkt->datalen
571 + pkt->oobdatalen + pkt->pktinfolen))
574 if (unlikely(pkt->datalen == 0))
578 if (unlikely(pkt->dataoffset < RNDIS_PACKET_MSG_OFFSET_MIN))
581 if (likely(pkt->pktinfooffset > 0) &&
582 unlikely(pkt->pktinfooffset < RNDIS_PACKET_MSG_OFFSET_MIN ||
583 (pkt->pktinfooffset & RNDIS_PACKET_MSG_OFFSET_ALIGNMASK)))
586 data_off = RNDIS_PACKET_MSG_OFFSET_ABS(pkt->dataoffset);
587 data_len = pkt->datalen;
588 pktinfo_off = RNDIS_PACKET_MSG_OFFSET_ABS(pkt->pktinfooffset);
589 pktinfo_len = pkt->pktinfolen;
591 if (likely(pktinfo_len > 0)) {
592 err = hn_rndis_rxinfo((const uint8_t *)pkt + pktinfo_off,
598 if (unlikely(data_off + data_len > pkt->len))
601 if (unlikely(data_len < ETHER_HDR_LEN))
604 hn_rxpkt(rxq, rxb, data, data_off, data_len, &info);
611 hn_rndis_receive(struct rte_eth_dev *dev, struct hn_rx_queue *rxq,
612 struct hn_rx_bufinfo *rxb, void *buf, uint32_t len)
614 const struct rndis_msghdr *hdr = buf;
617 case RNDIS_PACKET_MSG:
618 if (dev->data->dev_started)
619 hn_rndis_rx_data(rxq, rxb, buf, len);
622 case RNDIS_INDICATE_STATUS_MSG:
623 hn_rndis_link_status(dev, buf);
626 case RNDIS_INITIALIZE_CMPLT:
627 case RNDIS_QUERY_CMPLT:
628 case RNDIS_SET_CMPLT:
629 hn_rndis_receive_response(rxq->hv, buf, len);
634 "unexpected RNDIS message (type %#x len %u)",
641 hn_nvs_handle_rxbuf(struct rte_eth_dev *dev,
643 struct hn_rx_queue *rxq,
644 const struct vmbus_chanpkt_hdr *hdr,
647 const struct vmbus_chanpkt_rxbuf *pkt;
648 const struct hn_nvs_hdr *nvs_hdr = buf;
649 uint32_t rxbuf_sz = hv->rxbuf_res->len;
650 char *rxbuf = hv->rxbuf_res->addr;
651 unsigned int i, hlen, count;
652 struct hn_rx_bufinfo *rxb;
654 /* At minimum we need type header */
655 if (unlikely(vmbus_chanpkt_datalen(hdr) < sizeof(*nvs_hdr))) {
656 PMD_RX_LOG(ERR, "invalid receive nvs RNDIS");
660 /* Make sure that this is a RNDIS message. */
661 if (unlikely(nvs_hdr->type != NVS_TYPE_RNDIS)) {
662 PMD_RX_LOG(ERR, "nvs type %u, not RNDIS",
667 hlen = vmbus_chanpkt_getlen(hdr->hlen);
668 if (unlikely(hlen < sizeof(*pkt))) {
669 PMD_RX_LOG(ERR, "invalid rxbuf chanpkt");
673 pkt = container_of(hdr, const struct vmbus_chanpkt_rxbuf, hdr);
674 if (unlikely(pkt->rxbuf_id != NVS_RXBUF_SIG)) {
675 PMD_RX_LOG(ERR, "invalid rxbuf_id 0x%08x",
680 count = pkt->rxbuf_cnt;
681 if (unlikely(hlen < offsetof(struct vmbus_chanpkt_rxbuf,
683 PMD_RX_LOG(ERR, "invalid rxbuf_cnt %u", count);
687 if (pkt->hdr.xactid > hv->rxbuf_section_cnt) {
688 PMD_RX_LOG(ERR, "invalid rxbuf section id %" PRIx64,
693 /* Setup receive buffer info to allow for callback */
694 rxb = hn_rx_buf_init(rxq, pkt);
696 /* Each range represents 1 RNDIS pkt that contains 1 Ethernet frame */
697 for (i = 0; i < count; ++i) {
698 unsigned int ofs, len;
700 ofs = pkt->rxbuf[i].ofs;
701 len = pkt->rxbuf[i].len;
703 if (unlikely(ofs + len > rxbuf_sz)) {
705 "%uth RNDIS msg overflow ofs %u, len %u",
710 if (unlikely(len == 0)) {
711 PMD_RX_LOG(ERR, "%uth RNDIS msg len %u", i, len);
715 hn_rndis_receive(dev, rxq, rxb,
719 /* Send ACK now if external mbuf not used */
720 hn_rx_buf_release(rxb);
724 * Called when NVS inband events are received.
725 * Send up a two part message with port_id and the NVS message
726 * to the pipe to the netvsc-vf-event control thread.
728 static void hn_nvs_handle_notify(struct rte_eth_dev *dev,
729 const struct vmbus_chanpkt_hdr *pkt,
732 const struct hn_nvs_hdr *hdr = data;
735 case NVS_TYPE_TXTBL_NOTE:
736 /* Transmit indirection table has locking problems
737 * in DPDK and therefore not implemented
739 PMD_DRV_LOG(DEBUG, "host notify of transmit indirection table");
742 case NVS_TYPE_VFASSOC_NOTE:
743 hn_nvs_handle_vfassoc(dev, pkt, data);
748 "got notify, nvs type %u", hdr->type);
752 struct hn_rx_queue *hn_rx_queue_alloc(struct hn_data *hv,
754 unsigned int socket_id)
756 struct hn_rx_queue *rxq;
758 rxq = rte_zmalloc_socket("HN_RXQ", sizeof(*rxq),
759 RTE_CACHE_LINE_SIZE, socket_id);
764 rxq->chan = hv->channels[queue_id];
765 rte_spinlock_init(&rxq->ring_lock);
766 rxq->port_id = hv->port_id;
767 rxq->queue_id = queue_id;
768 rxq->event_sz = HN_RXQ_EVENT_DEFAULT;
769 rxq->event_buf = rte_malloc_socket("HN_EVENTS", HN_RXQ_EVENT_DEFAULT,
770 RTE_CACHE_LINE_SIZE, socket_id);
771 if (!rxq->event_buf) {
780 hn_dev_rx_queue_setup(struct rte_eth_dev *dev,
781 uint16_t queue_idx, uint16_t nb_desc,
782 unsigned int socket_id,
783 const struct rte_eth_rxconf *rx_conf,
784 struct rte_mempool *mp)
786 struct hn_data *hv = dev->data->dev_private;
787 char ring_name[RTE_RING_NAMESIZE];
788 struct hn_rx_queue *rxq;
792 PMD_INIT_FUNC_TRACE();
794 if (queue_idx == 0) {
797 rxq = hn_rx_queue_alloc(hv, queue_idx, socket_id);
803 count = rte_mempool_avail_count(mp) / dev->data->nb_rx_queues;
804 if (nb_desc == 0 || nb_desc > count)
808 * Staging ring from receive event logic to rx_pkts.
809 * rx_pkts assumes caller is handling multi-thread issue.
810 * event logic has locking.
812 snprintf(ring_name, sizeof(ring_name),
813 "hn_rx_%u_%u", dev->data->port_id, queue_idx);
814 rxq->rx_ring = rte_ring_create(ring_name,
815 rte_align32pow2(nb_desc),
820 error = hn_vf_rx_queue_setup(dev, queue_idx, nb_desc,
821 socket_id, rx_conf, mp);
825 dev->data->rx_queues[queue_idx] = rxq;
829 rte_ring_free(rxq->rx_ring);
830 rte_free(rxq->event_buf);
836 hn_dev_rx_queue_release(void *arg)
838 struct hn_rx_queue *rxq = arg;
840 PMD_INIT_FUNC_TRACE();
845 rte_ring_free(rxq->rx_ring);
849 hn_vf_rx_queue_release(rxq->hv, rxq->queue_id);
851 /* Keep primary queue to allow for control operations */
852 if (rxq != rxq->hv->primary) {
853 rte_free(rxq->event_buf);
859 hn_dev_tx_done_cleanup(void *arg, uint32_t free_cnt)
861 struct hn_tx_queue *txq = arg;
863 return hn_process_events(txq->hv, txq->queue_id, free_cnt);
867 * Process pending events on the channel.
868 * Called from both Rx queue poll and Tx cleanup
870 uint32_t hn_process_events(struct hn_data *hv, uint16_t queue_id,
873 struct rte_eth_dev *dev = &rte_eth_devices[hv->port_id];
874 struct hn_rx_queue *rxq;
875 uint32_t bytes_read = 0;
876 uint32_t tx_done = 0;
879 rxq = queue_id == 0 ? hv->primary : dev->data->rx_queues[queue_id];
881 /* If no pending data then nothing to do */
882 if (rte_vmbus_chan_rx_empty(rxq->chan))
886 * Since channel is shared between Rx and TX queue need to have a lock
887 * since DPDK does not force same CPU to be used for Rx/Tx.
889 if (unlikely(!rte_spinlock_trylock(&rxq->ring_lock)))
893 const struct vmbus_chanpkt_hdr *pkt;
894 uint32_t len = rxq->event_sz;
898 ret = rte_vmbus_chan_recv_raw(rxq->chan, rxq->event_buf, &len);
900 break; /* ring is empty */
902 if (unlikely(ret == -ENOBUFS)) {
903 /* event buffer not large enough to read ring */
906 "event buffer expansion (need %u)", len);
907 rxq->event_sz = len + len / 4;
908 rxq->event_buf = rte_realloc(rxq->event_buf, rxq->event_sz,
909 RTE_CACHE_LINE_SIZE);
912 /* out of memory, no more events now */
917 if (unlikely(ret <= 0)) {
918 /* This indicates a failure to communicate (or worse) */
919 rte_exit(EXIT_FAILURE,
920 "vmbus ring buffer error: %d", ret);
924 pkt = (const struct vmbus_chanpkt_hdr *)rxq->event_buf;
925 data = (char *)rxq->event_buf + vmbus_chanpkt_getlen(pkt->hlen);
928 case VMBUS_CHANPKT_TYPE_COMP:
930 hn_nvs_handle_comp(dev, queue_id, pkt, data);
933 case VMBUS_CHANPKT_TYPE_RXBUF:
934 hn_nvs_handle_rxbuf(dev, hv, rxq, pkt, data);
937 case VMBUS_CHANPKT_TYPE_INBAND:
938 hn_nvs_handle_notify(dev, pkt, data);
942 PMD_DRV_LOG(ERR, "unknown chan pkt %u", pkt->type);
946 if (tx_limit && tx_done >= tx_limit)
949 if (rxq->rx_ring && rte_ring_full(rxq->rx_ring))
954 rte_vmbus_chan_signal_read(rxq->chan, bytes_read);
956 rte_spinlock_unlock(&rxq->ring_lock);
961 static void hn_append_to_chim(struct hn_tx_queue *txq,
962 struct rndis_packet_msg *pkt,
963 const struct rte_mbuf *m)
965 struct hn_txdesc *txd = txq->agg_txd;
966 uint8_t *buf = (uint8_t *)pkt;
967 unsigned int data_offs;
971 data_offs = RNDIS_PACKET_MSG_OFFSET_ABS(pkt->dataoffset);
972 txd->chim_size += pkt->len;
973 txd->data_size += m->pkt_len;
975 hn_update_packet_stats(&txq->stats, m);
977 for (; m; m = m->next) {
978 uint16_t len = rte_pktmbuf_data_len(m);
980 rte_memcpy(buf + data_offs,
981 rte_pktmbuf_mtod(m, const char *), len);
987 * Send pending aggregated data in chimney buffer (if any).
988 * Returns error if send was unsuccessful because channel ring buffer
991 static int hn_flush_txagg(struct hn_tx_queue *txq, bool *need_sig)
994 struct hn_txdesc *txd = txq->agg_txd;
995 struct hn_nvs_rndis rndis;
1001 rndis = (struct hn_nvs_rndis) {
1002 .type = NVS_TYPE_RNDIS,
1003 .rndis_mtype = NVS_RNDIS_MTYPE_DATA,
1004 .chim_idx = txd->chim_index,
1005 .chim_sz = txd->chim_size,
1008 PMD_TX_LOG(DEBUG, "port %u:%u tx %u size %u",
1009 txq->port_id, txq->queue_id, txd->chim_index, txd->chim_size);
1011 ret = hn_nvs_send(txq->chan, VMBUS_CHANPKT_FLAG_RC,
1012 &rndis, sizeof(rndis), (uintptr_t)txd, need_sig);
1014 if (likely(ret == 0))
1015 hn_reset_txagg(txq);
1017 PMD_TX_LOG(NOTICE, "port %u:%u send failed: %d",
1018 txq->port_id, txq->queue_id, ret);
1023 static struct hn_txdesc *hn_new_txd(struct hn_data *hv,
1024 struct hn_tx_queue *txq)
1026 struct hn_txdesc *txd;
1028 if (rte_mempool_get(hv->tx_pool, (void **)&txd)) {
1029 ++txq->stats.ring_full;
1030 PMD_TX_LOG(DEBUG, "tx pool exhausted!");
1035 txd->queue_id = txq->queue_id;
1044 hn_try_txagg(struct hn_data *hv, struct hn_tx_queue *txq, uint32_t pktsize)
1046 struct hn_txdesc *agg_txd = txq->agg_txd;
1047 struct rndis_packet_msg *pkt;
1051 unsigned int padding, olen;
1054 * Update the previous RNDIS packet's total length,
1055 * it can be increased due to the mandatory alignment
1056 * padding for this RNDIS packet. And update the
1057 * aggregating txdesc's chimney sending buffer size
1060 * Zero-out the padding, as required by the RNDIS spec.
1062 pkt = txq->agg_prevpkt;
1064 padding = RTE_ALIGN(olen, txq->agg_align) - olen;
1066 agg_txd->chim_size += padding;
1067 pkt->len += padding;
1068 memset((uint8_t *)pkt + olen, 0, padding);
1071 chim = (uint8_t *)pkt + pkt->len;
1074 txq->agg_szleft -= pktsize;
1075 if (txq->agg_szleft < HN_PKTSIZE_MIN(txq->agg_align)) {
1077 * Probably can't aggregate more packets,
1078 * flush this aggregating txdesc proactively.
1080 txq->agg_pktleft = 0;
1083 agg_txd = hn_new_txd(hv, txq);
1087 chim = (uint8_t *)hv->chim_res->addr
1088 + agg_txd->chim_index * hv->chim_szmax;
1090 txq->agg_txd = agg_txd;
1091 txq->agg_pktleft = txq->agg_pktmax - 1;
1092 txq->agg_szleft = txq->agg_szmax - pktsize;
1094 txq->agg_prevpkt = chim;
1099 static inline void *
1100 hn_rndis_pktinfo_append(struct rndis_packet_msg *pkt,
1101 uint32_t pi_dlen, uint32_t pi_type)
1103 const uint32_t pi_size = RNDIS_PKTINFO_SIZE(pi_dlen);
1104 struct rndis_pktinfo *pi;
1107 * Per-packet-info does not move; it only grows.
1110 * pktinfooffset in this phase counts from the beginning
1111 * of rndis_packet_msg.
1113 pi = (struct rndis_pktinfo *)((uint8_t *)pkt + hn_rndis_pktlen(pkt));
1115 pkt->pktinfolen += pi_size;
1119 pi->offset = RNDIS_PKTINFO_OFFSET;
1124 /* Put RNDIS header and packet info on packet */
1125 static void hn_encap(struct rndis_packet_msg *pkt,
1127 const struct rte_mbuf *m)
1129 unsigned int hlen = m->l2_len + m->l3_len;
1133 pkt->type = RNDIS_PACKET_MSG;
1134 pkt->len = m->pkt_len;
1135 pkt->dataoffset = 0;
1136 pkt->datalen = m->pkt_len;
1137 pkt->oobdataoffset = 0;
1138 pkt->oobdatalen = 0;
1139 pkt->oobdataelements = 0;
1140 pkt->pktinfooffset = sizeof(*pkt);
1141 pkt->pktinfolen = 0;
1146 * Set the hash value for this packet, to the queue_id to cause
1147 * TX done event for this packet on the right channel.
1149 pi_data = hn_rndis_pktinfo_append(pkt, NDIS_HASH_VALUE_SIZE,
1150 NDIS_PKTINFO_TYPE_HASHVAL);
1151 *pi_data = queue_id;
1153 if (m->ol_flags & PKT_TX_VLAN_PKT) {
1154 pi_data = hn_rndis_pktinfo_append(pkt, NDIS_VLAN_INFO_SIZE,
1155 NDIS_PKTINFO_TYPE_VLAN);
1156 *pi_data = m->vlan_tci;
1159 if (m->ol_flags & PKT_TX_TCP_SEG) {
1160 pi_data = hn_rndis_pktinfo_append(pkt, NDIS_LSO2_INFO_SIZE,
1161 NDIS_PKTINFO_TYPE_LSO);
1163 if (m->ol_flags & PKT_TX_IPV6) {
1164 *pi_data = NDIS_LSO2_INFO_MAKEIPV6(hlen,
1167 *pi_data = NDIS_LSO2_INFO_MAKEIPV4(hlen,
1170 } else if (m->ol_flags &
1171 (PKT_TX_TCP_CKSUM | PKT_TX_UDP_CKSUM | PKT_TX_IP_CKSUM)) {
1172 pi_data = hn_rndis_pktinfo_append(pkt, NDIS_TXCSUM_INFO_SIZE,
1173 NDIS_PKTINFO_TYPE_CSUM);
1176 if (m->ol_flags & PKT_TX_IPV6)
1177 *pi_data |= NDIS_TXCSUM_INFO_IPV6;
1178 if (m->ol_flags & PKT_TX_IPV4) {
1179 *pi_data |= NDIS_TXCSUM_INFO_IPV4;
1181 if (m->ol_flags & PKT_TX_IP_CKSUM)
1182 *pi_data |= NDIS_TXCSUM_INFO_IPCS;
1185 if (m->ol_flags & PKT_TX_TCP_CKSUM)
1186 *pi_data |= NDIS_TXCSUM_INFO_MKTCPCS(hlen);
1187 else if (m->ol_flags & PKT_TX_UDP_CKSUM)
1188 *pi_data |= NDIS_TXCSUM_INFO_MKUDPCS(hlen);
1191 pkt_hlen = pkt->pktinfooffset + pkt->pktinfolen;
1192 /* Fixup RNDIS packet message total length */
1193 pkt->len += pkt_hlen;
1195 /* Convert RNDIS packet message offsets */
1196 pkt->dataoffset = hn_rndis_pktmsg_offset(pkt_hlen);
1197 pkt->pktinfooffset = hn_rndis_pktmsg_offset(pkt->pktinfooffset);
1200 /* How many scatter gather list elements ar needed */
1201 static unsigned int hn_get_slots(const struct rte_mbuf *m)
1203 unsigned int slots = 1; /* for RNDIS header */
1206 unsigned int size = rte_pktmbuf_data_len(m);
1207 unsigned int offs = rte_mbuf_data_iova(m) & PAGE_MASK;
1209 slots += (offs + size + PAGE_SIZE - 1) / PAGE_SIZE;
1216 /* Build scatter gather list from chained mbuf */
1217 static unsigned int hn_fill_sg(struct vmbus_gpa *sg,
1218 const struct rte_mbuf *m)
1220 unsigned int segs = 0;
1223 rte_iova_t addr = rte_mbuf_data_iova(m);
1224 unsigned int page = addr / PAGE_SIZE;
1225 unsigned int offset = addr & PAGE_MASK;
1226 unsigned int len = rte_pktmbuf_data_len(m);
1229 unsigned int bytes = RTE_MIN(len, PAGE_SIZE - offset);
1231 sg[segs].page = page;
1232 sg[segs].ofs = offset;
1233 sg[segs].len = bytes;
1246 /* Transmit directly from mbuf */
1247 static int hn_xmit_sg(struct hn_tx_queue *txq,
1248 const struct hn_txdesc *txd, const struct rte_mbuf *m,
1251 struct vmbus_gpa sg[hn_get_slots(m)];
1252 struct hn_nvs_rndis nvs_rndis = {
1253 .type = NVS_TYPE_RNDIS,
1254 .rndis_mtype = NVS_RNDIS_MTYPE_DATA,
1255 .chim_sz = txd->chim_size,
1260 /* attach aggregation data if present */
1261 if (txd->chim_size > 0)
1262 nvs_rndis.chim_idx = txd->chim_index;
1264 nvs_rndis.chim_idx = NVS_CHIM_IDX_INVALID;
1266 hn_rndis_dump(txd->rndis_pkt);
1268 /* pass IOVA of rndis header in first segment */
1269 addr = rte_malloc_virt2iova(txd->rndis_pkt);
1270 if (unlikely(addr == RTE_BAD_IOVA)) {
1271 PMD_DRV_LOG(ERR, "RNDIS transmit can not get iova");
1275 sg[0].page = addr / PAGE_SIZE;
1276 sg[0].ofs = addr & PAGE_MASK;
1277 sg[0].len = RNDIS_PACKET_MSG_OFFSET_ABS(hn_rndis_pktlen(txd->rndis_pkt));
1280 hn_update_packet_stats(&txq->stats, m);
1282 segs += hn_fill_sg(sg + 1, m);
1284 PMD_TX_LOG(DEBUG, "port %u:%u tx %u segs %u size %u",
1285 txq->port_id, txq->queue_id, txd->chim_index,
1286 segs, nvs_rndis.chim_sz);
1288 return hn_nvs_send_sglist(txq->chan, sg, segs,
1289 &nvs_rndis, sizeof(nvs_rndis),
1290 (uintptr_t)txd, need_sig);
1294 hn_xmit_pkts(void *ptxq, struct rte_mbuf **tx_pkts, uint16_t nb_pkts)
1296 struct hn_tx_queue *txq = ptxq;
1297 uint16_t queue_id = txq->queue_id;
1298 struct hn_data *hv = txq->hv;
1299 struct rte_eth_dev *vf_dev;
1300 bool need_sig = false;
1304 if (unlikely(hv->closed))
1307 /* Transmit over VF if present and up */
1308 vf_dev = hv->vf_dev;
1309 rte_compiler_barrier();
1310 if (vf_dev && vf_dev->data->dev_started) {
1311 void *sub_q = vf_dev->data->tx_queues[queue_id];
1313 return (*vf_dev->tx_pkt_burst)(sub_q, tx_pkts, nb_pkts);
1316 if (rte_mempool_avail_count(hv->tx_pool) <= txq->free_thresh)
1317 hn_process_events(hv, txq->queue_id, 0);
1319 for (nb_tx = 0; nb_tx < nb_pkts; nb_tx++) {
1320 struct rte_mbuf *m = tx_pkts[nb_tx];
1321 uint32_t pkt_size = m->pkt_len + HN_RNDIS_PKT_LEN;
1322 struct rndis_packet_msg *pkt;
1324 /* For small packets aggregate them in chimney buffer */
1325 if (m->pkt_len < HN_TXCOPY_THRESHOLD && pkt_size <= txq->agg_szmax) {
1326 /* If this packet will not fit, then flush */
1327 if (txq->agg_pktleft == 0 ||
1328 RTE_ALIGN(pkt_size, txq->agg_align) > txq->agg_szleft) {
1329 if (hn_flush_txagg(txq, &need_sig))
1333 pkt = hn_try_txagg(hv, txq, pkt_size);
1337 hn_encap(pkt, queue_id, m);
1338 hn_append_to_chim(txq, pkt, m);
1340 rte_pktmbuf_free(m);
1342 /* if buffer is full, flush */
1343 if (txq->agg_pktleft == 0 &&
1344 hn_flush_txagg(txq, &need_sig))
1347 struct hn_txdesc *txd;
1349 /* can send chimney data and large packet at once */
1352 hn_reset_txagg(txq);
1354 txd = hn_new_txd(hv, txq);
1359 pkt = txd->rndis_pkt;
1361 txd->data_size += m->pkt_len;
1364 hn_encap(pkt, queue_id, m);
1366 ret = hn_xmit_sg(txq, txd, m, &need_sig);
1367 if (unlikely(ret != 0)) {
1368 PMD_TX_LOG(NOTICE, "sg send failed: %d", ret);
1369 ++txq->stats.errors;
1370 rte_mempool_put(hv->tx_pool, txd);
1376 /* If partial buffer left, then try and send it.
1377 * if that fails, then reuse it on next send.
1379 hn_flush_txagg(txq, &need_sig);
1383 rte_vmbus_chan_signal_tx(txq->chan);
1389 hn_recv_pkts(void *prxq, struct rte_mbuf **rx_pkts, uint16_t nb_pkts)
1391 struct hn_rx_queue *rxq = prxq;
1392 struct hn_data *hv = rxq->hv;
1393 struct rte_eth_dev *vf_dev;
1396 if (unlikely(hv->closed))
1399 vf_dev = hv->vf_dev;
1400 rte_compiler_barrier();
1402 if (vf_dev && vf_dev->data->dev_started) {
1403 /* Normally, with SR-IOV the ring buffer will be empty */
1404 hn_process_events(hv, rxq->queue_id, 0);
1406 /* Get mbufs some bufs off of staging ring */
1407 nb_rcv = rte_ring_sc_dequeue_burst(rxq->rx_ring,
1410 /* And rest off of VF */
1411 nb_rcv += rte_eth_rx_burst(vf_dev->data->port_id,
1413 rx_pkts + nb_rcv, nb_pkts - nb_rcv);
1415 /* If receive ring is not full then get more */
1416 if (rte_ring_count(rxq->rx_ring) < nb_pkts)
1417 hn_process_events(hv, rxq->queue_id, 0);
1419 nb_rcv = rte_ring_sc_dequeue_burst(rxq->rx_ring,