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freebsd-skq/sys/dev/hyperv/netvsc/if_hn.c
Sepherosa Ziehau 25641fc705 hyperv/hn: Fix primary channel revocation 
Since hypervisor will not drain the TX bufring, once the channels are
revoked:
- Setup vmbus orphan handler properly.
- Make sure that suspension will not wait the TX bufring draining
  forever.
- GC the pending TX descs on detach path, before freeing the busdma
  stuffs.

MFC after:	1 week
Sponsored by:	Microsoft
Differential Revision:	https://reviews.freebsd.org/D8559
2016-11-24 07:35:16 +00:00

5322 lines
135 KiB
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/*-
* Copyright (c) 2010-2012 Citrix Inc.
* Copyright (c) 2009-2012,2016 Microsoft Corp.
* Copyright (c) 2012 NetApp Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice unmodified, this list of conditions, and the following
* disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/*-
* Copyright (c) 2004-2006 Kip Macy
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include "opt_inet6.h"
#include "opt_inet.h"
#include <sys/param.h>
#include <sys/bus.h>
#include <sys/kernel.h>
#include <sys/limits.h>
#include <sys/malloc.h>
#include <sys/mbuf.h>
#include <sys/module.h>
#include <sys/queue.h>
#include <sys/lock.h>
#include <sys/smp.h>
#include <sys/socket.h>
#include <sys/sockio.h>
#include <sys/sx.h>
#include <sys/sysctl.h>
#include <sys/systm.h>
#include <sys/taskqueue.h>
#include <sys/buf_ring.h>
#include <machine/atomic.h>
#include <machine/in_cksum.h>
#include <net/bpf.h>
#include <net/ethernet.h>
#include <net/if.h>
#include <net/if_media.h>
#include <net/if_types.h>
#include <net/if_var.h>
#include <net/rndis.h>
#include <netinet/in_systm.h>
#include <netinet/in.h>
#include <netinet/ip.h>
#include <netinet/ip6.h>
#include <netinet/tcp.h>
#include <netinet/tcp_lro.h>
#include <netinet/udp.h>
#include <dev/hyperv/include/hyperv.h>
#include <dev/hyperv/include/hyperv_busdma.h>
#include <dev/hyperv/include/vmbus.h>
#include <dev/hyperv/include/vmbus_xact.h>
#include <dev/hyperv/netvsc/ndis.h>
#include <dev/hyperv/netvsc/if_hnreg.h>
#include <dev/hyperv/netvsc/if_hnvar.h>
#include <dev/hyperv/netvsc/hn_nvs.h>
#include <dev/hyperv/netvsc/hn_rndis.h>
#include "vmbus_if.h"
#define HN_IFSTART_SUPPORT
#define HN_RING_CNT_DEF_MAX 8
/* YYY should get it from the underlying channel */
#define HN_TX_DESC_CNT 512
#define HN_RNDIS_PKT_LEN \
(sizeof(struct rndis_packet_msg) + \
HN_RNDIS_PKTINFO_SIZE(HN_NDIS_HASH_VALUE_SIZE) + \
HN_RNDIS_PKTINFO_SIZE(NDIS_VLAN_INFO_SIZE) + \
HN_RNDIS_PKTINFO_SIZE(NDIS_LSO2_INFO_SIZE) + \
HN_RNDIS_PKTINFO_SIZE(NDIS_TXCSUM_INFO_SIZE))
#define HN_RNDIS_PKT_BOUNDARY PAGE_SIZE
#define HN_RNDIS_PKT_ALIGN CACHE_LINE_SIZE
#define HN_TX_DATA_BOUNDARY PAGE_SIZE
#define HN_TX_DATA_MAXSIZE IP_MAXPACKET
#define HN_TX_DATA_SEGSIZE PAGE_SIZE
/* -1 for RNDIS packet message */
#define HN_TX_DATA_SEGCNT_MAX (HN_GPACNT_MAX - 1)
#define HN_DIRECT_TX_SIZE_DEF 128
#define HN_EARLY_TXEOF_THRESH 8
#define HN_PKTBUF_LEN_DEF (16 * 1024)
#define HN_LROENT_CNT_DEF 128
#define HN_LRO_LENLIM_MULTIRX_DEF (12 * ETHERMTU)
#define HN_LRO_LENLIM_DEF (25 * ETHERMTU)
/* YYY 2*MTU is a bit rough, but should be good enough. */
#define HN_LRO_LENLIM_MIN(ifp) (2 * (ifp)->if_mtu)
#define HN_LRO_ACKCNT_DEF 1
#define HN_LOCK_INIT(sc) \
sx_init(&(sc)->hn_lock, device_get_nameunit((sc)->hn_dev))
#define HN_LOCK_DESTROY(sc) sx_destroy(&(sc)->hn_lock)
#define HN_LOCK_ASSERT(sc) sx_assert(&(sc)->hn_lock, SA_XLOCKED)
#define HN_LOCK(sc) \
do { \
while (sx_try_xlock(&(sc)->hn_lock) == 0) \
DELAY(1000); \
} while (0)
#define HN_UNLOCK(sc) sx_xunlock(&(sc)->hn_lock)
#define HN_CSUM_IP_MASK (CSUM_IP | CSUM_IP_TCP | CSUM_IP_UDP)
#define HN_CSUM_IP6_MASK (CSUM_IP6_TCP | CSUM_IP6_UDP)
#define HN_CSUM_IP_HWASSIST(sc) \
((sc)->hn_tx_ring[0].hn_csum_assist & HN_CSUM_IP_MASK)
#define HN_CSUM_IP6_HWASSIST(sc) \
((sc)->hn_tx_ring[0].hn_csum_assist & HN_CSUM_IP6_MASK)
#define HN_PKTSIZE_MIN(align) \
roundup2(ETHER_MIN_LEN + ETHER_VLAN_ENCAP_LEN - ETHER_CRC_LEN + \
HN_RNDIS_PKT_LEN, (align))
#define HN_PKTSIZE(m, align) \
roundup2((m)->m_pkthdr.len + HN_RNDIS_PKT_LEN, (align))
struct hn_txdesc {
#ifndef HN_USE_TXDESC_BUFRING
SLIST_ENTRY(hn_txdesc) link;
#endif
STAILQ_ENTRY(hn_txdesc) agg_link;
/* Aggregated txdescs, in sending order. */
STAILQ_HEAD(, hn_txdesc) agg_list;
/* The oldest packet, if transmission aggregation happens. */
struct mbuf *m;
struct hn_tx_ring *txr;
int refs;
uint32_t flags; /* HN_TXD_FLAG_ */
struct hn_nvs_sendctx send_ctx;
uint32_t chim_index;
int chim_size;
bus_dmamap_t data_dmap;
bus_addr_t rndis_pkt_paddr;
struct rndis_packet_msg *rndis_pkt;
bus_dmamap_t rndis_pkt_dmap;
};
#define HN_TXD_FLAG_ONLIST 0x0001
#define HN_TXD_FLAG_DMAMAP 0x0002
#define HN_TXD_FLAG_ONAGG 0x0004
struct hn_rxinfo {
uint32_t vlan_info;
uint32_t csum_info;
uint32_t hash_info;
uint32_t hash_value;
};
#define HN_RXINFO_VLAN 0x0001
#define HN_RXINFO_CSUM 0x0002
#define HN_RXINFO_HASHINF 0x0004
#define HN_RXINFO_HASHVAL 0x0008
#define HN_RXINFO_ALL \
(HN_RXINFO_VLAN | \
HN_RXINFO_CSUM | \
HN_RXINFO_HASHINF | \
HN_RXINFO_HASHVAL)
#define HN_NDIS_VLAN_INFO_INVALID 0xffffffff
#define HN_NDIS_RXCSUM_INFO_INVALID 0
#define HN_NDIS_HASH_INFO_INVALID 0
static int hn_probe(device_t);
static int hn_attach(device_t);
static int hn_detach(device_t);
static int hn_shutdown(device_t);
static void hn_chan_callback(struct vmbus_channel *,
void *);
static void hn_init(void *);
static int hn_ioctl(struct ifnet *, u_long, caddr_t);
#ifdef HN_IFSTART_SUPPORT
static void hn_start(struct ifnet *);
#endif
static int hn_transmit(struct ifnet *, struct mbuf *);
static void hn_xmit_qflush(struct ifnet *);
static int hn_ifmedia_upd(struct ifnet *);
static void hn_ifmedia_sts(struct ifnet *,
struct ifmediareq *);
static int hn_rndis_rxinfo(const void *, int,
struct hn_rxinfo *);
static void hn_rndis_rx_data(struct hn_rx_ring *,
const void *, int);
static void hn_rndis_rx_status(struct hn_softc *,
const void *, int);
static void hn_nvs_handle_notify(struct hn_softc *,
const struct vmbus_chanpkt_hdr *);
static void hn_nvs_handle_comp(struct hn_softc *,
struct vmbus_channel *,
const struct vmbus_chanpkt_hdr *);
static void hn_nvs_handle_rxbuf(struct hn_rx_ring *,
struct vmbus_channel *,
const struct vmbus_chanpkt_hdr *);
static void hn_nvs_ack_rxbuf(struct hn_rx_ring *,
struct vmbus_channel *, uint64_t);
#if __FreeBSD_version >= 1100099
static int hn_lro_lenlim_sysctl(SYSCTL_HANDLER_ARGS);
static int hn_lro_ackcnt_sysctl(SYSCTL_HANDLER_ARGS);
#endif
static int hn_trust_hcsum_sysctl(SYSCTL_HANDLER_ARGS);
static int hn_chim_size_sysctl(SYSCTL_HANDLER_ARGS);
#if __FreeBSD_version < 1100095
static int hn_rx_stat_int_sysctl(SYSCTL_HANDLER_ARGS);
#else
static int hn_rx_stat_u64_sysctl(SYSCTL_HANDLER_ARGS);
#endif
static int hn_rx_stat_ulong_sysctl(SYSCTL_HANDLER_ARGS);
static int hn_tx_stat_ulong_sysctl(SYSCTL_HANDLER_ARGS);
static int hn_tx_conf_int_sysctl(SYSCTL_HANDLER_ARGS);
static int hn_ndis_version_sysctl(SYSCTL_HANDLER_ARGS);
static int hn_caps_sysctl(SYSCTL_HANDLER_ARGS);
static int hn_hwassist_sysctl(SYSCTL_HANDLER_ARGS);
static int hn_rxfilter_sysctl(SYSCTL_HANDLER_ARGS);
static int hn_rss_key_sysctl(SYSCTL_HANDLER_ARGS);
static int hn_rss_ind_sysctl(SYSCTL_HANDLER_ARGS);
static int hn_rss_hash_sysctl(SYSCTL_HANDLER_ARGS);
static int hn_txagg_size_sysctl(SYSCTL_HANDLER_ARGS);
static int hn_txagg_pkts_sysctl(SYSCTL_HANDLER_ARGS);
static int hn_txagg_pktmax_sysctl(SYSCTL_HANDLER_ARGS);
static int hn_txagg_align_sysctl(SYSCTL_HANDLER_ARGS);
static void hn_stop(struct hn_softc *);
static void hn_init_locked(struct hn_softc *);
static int hn_chan_attach(struct hn_softc *,
struct vmbus_channel *);
static void hn_chan_detach(struct hn_softc *,
struct vmbus_channel *);
static int hn_attach_subchans(struct hn_softc *);
static void hn_detach_allchans(struct hn_softc *);
static void hn_chan_rollup(struct hn_rx_ring *,
struct hn_tx_ring *);
static void hn_set_ring_inuse(struct hn_softc *, int);
static int hn_synth_attach(struct hn_softc *, int);
static void hn_synth_detach(struct hn_softc *);
static int hn_synth_alloc_subchans(struct hn_softc *,
int *);
static void hn_suspend(struct hn_softc *);
static void hn_suspend_data(struct hn_softc *);
static void hn_suspend_mgmt(struct hn_softc *);
static void hn_resume(struct hn_softc *);
static void hn_resume_data(struct hn_softc *);
static void hn_resume_mgmt(struct hn_softc *);
static void hn_suspend_mgmt_taskfunc(void *, int);
static void hn_chan_drain(struct hn_softc *,
struct vmbus_channel *);
static void hn_update_link_status(struct hn_softc *);
static void hn_change_network(struct hn_softc *);
static void hn_link_taskfunc(void *, int);
static void hn_netchg_init_taskfunc(void *, int);
static void hn_netchg_status_taskfunc(void *, int);
static void hn_link_status(struct hn_softc *);
static int hn_create_rx_data(struct hn_softc *, int);
static void hn_destroy_rx_data(struct hn_softc *);
static int hn_check_iplen(const struct mbuf *, int);
static int hn_set_rxfilter(struct hn_softc *);
static int hn_rss_reconfig(struct hn_softc *);
static void hn_rss_ind_fixup(struct hn_softc *, int);
static int hn_rxpkt(struct hn_rx_ring *, const void *,
int, const struct hn_rxinfo *);
static int hn_tx_ring_create(struct hn_softc *, int);
static void hn_tx_ring_destroy(struct hn_tx_ring *);
static int hn_create_tx_data(struct hn_softc *, int);
static void hn_fixup_tx_data(struct hn_softc *);
static void hn_destroy_tx_data(struct hn_softc *);
static void hn_txdesc_dmamap_destroy(struct hn_txdesc *);
static void hn_txdesc_gc(struct hn_tx_ring *,
struct hn_txdesc *);
static int hn_encap(struct ifnet *, struct hn_tx_ring *,
struct hn_txdesc *, struct mbuf **);
static int hn_txpkt(struct ifnet *, struct hn_tx_ring *,
struct hn_txdesc *);
static void hn_set_chim_size(struct hn_softc *, int);
static void hn_set_tso_maxsize(struct hn_softc *, int, int);
static bool hn_tx_ring_pending(struct hn_tx_ring *);
static void hn_tx_ring_qflush(struct hn_tx_ring *);
static void hn_resume_tx(struct hn_softc *, int);
static void hn_set_txagg(struct hn_softc *);
static void *hn_try_txagg(struct ifnet *,
struct hn_tx_ring *, struct hn_txdesc *,
int);
static int hn_get_txswq_depth(const struct hn_tx_ring *);
static void hn_txpkt_done(struct hn_nvs_sendctx *,
struct hn_softc *, struct vmbus_channel *,
const void *, int);
static int hn_txpkt_sglist(struct hn_tx_ring *,
struct hn_txdesc *);
static int hn_txpkt_chim(struct hn_tx_ring *,
struct hn_txdesc *);
static int hn_xmit(struct hn_tx_ring *, int);
static void hn_xmit_taskfunc(void *, int);
static void hn_xmit_txeof(struct hn_tx_ring *);
static void hn_xmit_txeof_taskfunc(void *, int);
#ifdef HN_IFSTART_SUPPORT
static int hn_start_locked(struct hn_tx_ring *, int);
static void hn_start_taskfunc(void *, int);
static void hn_start_txeof(struct hn_tx_ring *);
static void hn_start_txeof_taskfunc(void *, int);
#endif
SYSCTL_NODE(_hw, OID_AUTO, hn, CTLFLAG_RD | CTLFLAG_MPSAFE, NULL,
"Hyper-V network interface");
/* Trust tcp segements verification on host side. */
static int hn_trust_hosttcp = 1;
SYSCTL_INT(_hw_hn, OID_AUTO, trust_hosttcp, CTLFLAG_RDTUN,
&hn_trust_hosttcp, 0,
"Trust tcp segement verification on host side, "
"when csum info is missing (global setting)");
/* Trust udp datagrams verification on host side. */
static int hn_trust_hostudp = 1;
SYSCTL_INT(_hw_hn, OID_AUTO, trust_hostudp, CTLFLAG_RDTUN,
&hn_trust_hostudp, 0,
"Trust udp datagram verification on host side, "
"when csum info is missing (global setting)");
/* Trust ip packets verification on host side. */
static int hn_trust_hostip = 1;
SYSCTL_INT(_hw_hn, OID_AUTO, trust_hostip, CTLFLAG_RDTUN,
&hn_trust_hostip, 0,
"Trust ip packet verification on host side, "
"when csum info is missing (global setting)");
/* Limit TSO burst size */
static int hn_tso_maxlen = IP_MAXPACKET;
SYSCTL_INT(_hw_hn, OID_AUTO, tso_maxlen, CTLFLAG_RDTUN,
&hn_tso_maxlen, 0, "TSO burst limit");
/* Limit chimney send size */
static int hn_tx_chimney_size = 0;
SYSCTL_INT(_hw_hn, OID_AUTO, tx_chimney_size, CTLFLAG_RDTUN,
&hn_tx_chimney_size, 0, "Chimney send packet size limit");
/* Limit the size of packet for direct transmission */
static int hn_direct_tx_size = HN_DIRECT_TX_SIZE_DEF;
SYSCTL_INT(_hw_hn, OID_AUTO, direct_tx_size, CTLFLAG_RDTUN,
&hn_direct_tx_size, 0, "Size of the packet for direct transmission");
/* # of LRO entries per RX ring */
#if defined(INET) || defined(INET6)
#if __FreeBSD_version >= 1100095
static int hn_lro_entry_count = HN_LROENT_CNT_DEF;
SYSCTL_INT(_hw_hn, OID_AUTO, lro_entry_count, CTLFLAG_RDTUN,
&hn_lro_entry_count, 0, "LRO entry count");
#endif
#endif
/* Use shared TX taskqueue */
static int hn_share_tx_taskq = 0;
SYSCTL_INT(_hw_hn, OID_AUTO, share_tx_taskq, CTLFLAG_RDTUN,
&hn_share_tx_taskq, 0, "Enable shared TX taskqueue");
#ifndef HN_USE_TXDESC_BUFRING
static int hn_use_txdesc_bufring = 0;
#else
static int hn_use_txdesc_bufring = 1;
#endif
SYSCTL_INT(_hw_hn, OID_AUTO, use_txdesc_bufring, CTLFLAG_RD,
&hn_use_txdesc_bufring, 0, "Use buf_ring for TX descriptors");
/* Bind TX taskqueue to the target CPU */
static int hn_bind_tx_taskq = -1;
SYSCTL_INT(_hw_hn, OID_AUTO, bind_tx_taskq, CTLFLAG_RDTUN,
&hn_bind_tx_taskq, 0, "Bind TX taskqueue to the specified cpu");
#ifdef HN_IFSTART_SUPPORT
/* Use ifnet.if_start instead of ifnet.if_transmit */
static int hn_use_if_start = 0;
SYSCTL_INT(_hw_hn, OID_AUTO, use_if_start, CTLFLAG_RDTUN,
&hn_use_if_start, 0, "Use if_start TX method");
#endif
/* # of channels to use */
static int hn_chan_cnt = 0;
SYSCTL_INT(_hw_hn, OID_AUTO, chan_cnt, CTLFLAG_RDTUN,
&hn_chan_cnt, 0,
"# of channels to use; each channel has one RX ring and one TX ring");
/* # of transmit rings to use */
static int hn_tx_ring_cnt = 0;
SYSCTL_INT(_hw_hn, OID_AUTO, tx_ring_cnt, CTLFLAG_RDTUN,
&hn_tx_ring_cnt, 0, "# of TX rings to use");
/* Software TX ring deptch */
static int hn_tx_swq_depth = 0;
SYSCTL_INT(_hw_hn, OID_AUTO, tx_swq_depth, CTLFLAG_RDTUN,
&hn_tx_swq_depth, 0, "Depth of IFQ or BUFRING");
/* Enable sorted LRO, and the depth of the per-channel mbuf queue */
#if __FreeBSD_version >= 1100095
static u_int hn_lro_mbufq_depth = 0;
SYSCTL_UINT(_hw_hn, OID_AUTO, lro_mbufq_depth, CTLFLAG_RDTUN,
&hn_lro_mbufq_depth, 0, "Depth of LRO mbuf queue");
#endif
/* Packet transmission aggregation size limit */
static int hn_tx_agg_size = -1;
SYSCTL_INT(_hw_hn, OID_AUTO, tx_agg_size, CTLFLAG_RDTUN,
&hn_tx_agg_size, 0, "Packet transmission aggregation size limit");
/* Packet transmission aggregation count limit */
static int hn_tx_agg_pkts = 0;
SYSCTL_INT(_hw_hn, OID_AUTO, tx_agg_pkts, CTLFLAG_RDTUN,
&hn_tx_agg_pkts, 0, "Packet transmission aggregation packet limit");
static u_int hn_cpu_index; /* next CPU for channel */
static struct taskqueue *hn_tx_taskq; /* shared TX taskqueue */
static const uint8_t
hn_rss_key_default[NDIS_HASH_KEYSIZE_TOEPLITZ] = {
0x6d, 0x5a, 0x56, 0xda, 0x25, 0x5b, 0x0e, 0xc2,
0x41, 0x67, 0x25, 0x3d, 0x43, 0xa3, 0x8f, 0xb0,
0xd0, 0xca, 0x2b, 0xcb, 0xae, 0x7b, 0x30, 0xb4,
0x77, 0xcb, 0x2d, 0xa3, 0x80, 0x30, 0xf2, 0x0c,
0x6a, 0x42, 0xb7, 0x3b, 0xbe, 0xac, 0x01, 0xfa
};
static device_method_t hn_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, hn_probe),
DEVMETHOD(device_attach, hn_attach),
DEVMETHOD(device_detach, hn_detach),
DEVMETHOD(device_shutdown, hn_shutdown),
DEVMETHOD_END
};
static driver_t hn_driver = {
"hn",
hn_methods,
sizeof(struct hn_softc)
};
static devclass_t hn_devclass;
DRIVER_MODULE(hn, vmbus, hn_driver, hn_devclass, 0, 0);
MODULE_VERSION(hn, 1);
MODULE_DEPEND(hn, vmbus, 1, 1, 1);
#if __FreeBSD_version >= 1100099
static void
hn_set_lro_lenlim(struct hn_softc *sc, int lenlim)
{
int i;
for (i = 0; i < sc->hn_rx_ring_cnt; ++i)
sc->hn_rx_ring[i].hn_lro.lro_length_lim = lenlim;
}
#endif
static int
hn_txpkt_sglist(struct hn_tx_ring *txr, struct hn_txdesc *txd)
{
KASSERT(txd->chim_index == HN_NVS_CHIM_IDX_INVALID &&
txd->chim_size == 0, ("invalid rndis sglist txd"));
return (hn_nvs_send_rndis_sglist(txr->hn_chan, HN_NVS_RNDIS_MTYPE_DATA,
&txd->send_ctx, txr->hn_gpa, txr->hn_gpa_cnt));
}
static int
hn_txpkt_chim(struct hn_tx_ring *txr, struct hn_txdesc *txd)
{
struct hn_nvs_rndis rndis;
KASSERT(txd->chim_index != HN_NVS_CHIM_IDX_INVALID &&
txd->chim_size > 0, ("invalid rndis chim txd"));
rndis.nvs_type = HN_NVS_TYPE_RNDIS;
rndis.nvs_rndis_mtype = HN_NVS_RNDIS_MTYPE_DATA;
rndis.nvs_chim_idx = txd->chim_index;
rndis.nvs_chim_sz = txd->chim_size;
return (hn_nvs_send(txr->hn_chan, VMBUS_CHANPKT_FLAG_RC,
&rndis, sizeof(rndis), &txd->send_ctx));
}
static __inline uint32_t
hn_chim_alloc(struct hn_softc *sc)
{
int i, bmap_cnt = sc->hn_chim_bmap_cnt;
u_long *bmap = sc->hn_chim_bmap;
uint32_t ret = HN_NVS_CHIM_IDX_INVALID;
for (i = 0; i < bmap_cnt; ++i) {
int idx;
idx = ffsl(~bmap[i]);
if (idx == 0)
continue;
--idx; /* ffsl is 1-based */
KASSERT(i * LONG_BIT + idx < sc->hn_chim_cnt,
("invalid i %d and idx %d", i, idx));
if (atomic_testandset_long(&bmap[i], idx))
continue;
ret = i * LONG_BIT + idx;
break;
}
return (ret);
}
static __inline void
hn_chim_free(struct hn_softc *sc, uint32_t chim_idx)
{
u_long mask;
uint32_t idx;
idx = chim_idx / LONG_BIT;
KASSERT(idx < sc->hn_chim_bmap_cnt,
("invalid chimney index 0x%x", chim_idx));
mask = 1UL << (chim_idx % LONG_BIT);
KASSERT(sc->hn_chim_bmap[idx] & mask,
("index bitmap 0x%lx, chimney index %u, "
"bitmap idx %d, bitmask 0x%lx",
sc->hn_chim_bmap[idx], chim_idx, idx, mask));
atomic_clear_long(&sc->hn_chim_bmap[idx], mask);
}
#if defined(INET6) || defined(INET)
/*
* NOTE: If this function failed, the m_head would be freed.
*/
static __inline struct mbuf *
hn_tso_fixup(struct mbuf *m_head)
{
struct ether_vlan_header *evl;
struct tcphdr *th;
int ehlen;
KASSERT(M_WRITABLE(m_head), ("TSO mbuf not writable"));
#define PULLUP_HDR(m, len) \
do { \
if (__predict_false((m)->m_len < (len))) { \
(m) = m_pullup((m), (len)); \
if ((m) == NULL) \
return (NULL); \
} \
} while (0)
PULLUP_HDR(m_head, sizeof(*evl));
evl = mtod(m_head, struct ether_vlan_header *);
if (evl->evl_encap_proto == ntohs(ETHERTYPE_VLAN))
ehlen = ETHER_HDR_LEN + ETHER_VLAN_ENCAP_LEN;
else
ehlen = ETHER_HDR_LEN;
#ifdef INET
if (m_head->m_pkthdr.csum_flags & CSUM_IP_TSO) {
struct ip *ip;
int iphlen;
PULLUP_HDR(m_head, ehlen + sizeof(*ip));
ip = mtodo(m_head, ehlen);
iphlen = ip->ip_hl << 2;
PULLUP_HDR(m_head, ehlen + iphlen + sizeof(*th));
th = mtodo(m_head, ehlen + iphlen);
ip->ip_len = 0;
ip->ip_sum = 0;
th->th_sum = in_pseudo(ip->ip_src.s_addr,
ip->ip_dst.s_addr, htons(IPPROTO_TCP));
}
#endif
#if defined(INET6) && defined(INET)
else
#endif
#ifdef INET6
{
struct ip6_hdr *ip6;
PULLUP_HDR(m_head, ehlen + sizeof(*ip6));
ip6 = mtodo(m_head, ehlen);
if (ip6->ip6_nxt != IPPROTO_TCP) {
m_freem(m_head);
return (NULL);
}
PULLUP_HDR(m_head, ehlen + sizeof(*ip6) + sizeof(*th));
th = mtodo(m_head, ehlen + sizeof(*ip6));
ip6->ip6_plen = 0;
th->th_sum = in6_cksum_pseudo(ip6, 0, IPPROTO_TCP, 0);
}
#endif
return (m_head);
#undef PULLUP_HDR
}
#endif /* INET6 || INET */
static int
hn_set_rxfilter(struct hn_softc *sc)
{
struct ifnet *ifp = sc->hn_ifp;
uint32_t filter;
int error = 0;
HN_LOCK_ASSERT(sc);
if (ifp->if_flags & IFF_PROMISC) {
filter = NDIS_PACKET_TYPE_PROMISCUOUS;
} else {
filter = NDIS_PACKET_TYPE_DIRECTED;
if (ifp->if_flags & IFF_BROADCAST)
filter |= NDIS_PACKET_TYPE_BROADCAST;
/* TODO: support multicast list */
if ((ifp->if_flags & IFF_ALLMULTI) ||
!TAILQ_EMPTY(&ifp->if_multiaddrs))
filter |= NDIS_PACKET_TYPE_ALL_MULTICAST;
}
if (sc->hn_rx_filter != filter) {
error = hn_rndis_set_rxfilter(sc, filter);
if (!error)
sc->hn_rx_filter = filter;
}
return (error);
}
static void
hn_set_txagg(struct hn_softc *sc)
{
uint32_t size, pkts;
int i;
/*
* Setup aggregation size.
*/
if (sc->hn_agg_size < 0)
size = UINT32_MAX;
else
size = sc->hn_agg_size;
if (sc->hn_rndis_agg_size < size)
size = sc->hn_rndis_agg_size;
if (size <= 2 * HN_PKTSIZE_MIN(sc->hn_rndis_agg_align)) {
/* Disable */
size = 0;
pkts = 0;
goto done;
}
/* NOTE: Type of the per TX ring setting is 'int'. */
if (size > INT_MAX)
size = INT_MAX;
/* NOTE: We only aggregate packets using chimney sending buffers. */
if (size > (uint32_t)sc->hn_chim_szmax)
size = sc->hn_chim_szmax;
/*
* Setup aggregation packet count.
*/
if (sc->hn_agg_pkts < 0)
pkts = UINT32_MAX;
else
pkts = sc->hn_agg_pkts;
if (sc->hn_rndis_agg_pkts < pkts)
pkts = sc->hn_rndis_agg_pkts;
if (pkts <= 1) {
/* Disable */
size = 0;
pkts = 0;
goto done;
}
/* NOTE: Type of the per TX ring setting is 'short'. */
if (pkts > SHRT_MAX)
pkts = SHRT_MAX;
done:
/* NOTE: Type of the per TX ring setting is 'short'. */
if (sc->hn_rndis_agg_align > SHRT_MAX) {
/* Disable */
size = 0;
pkts = 0;
}
if (bootverbose) {
if_printf(sc->hn_ifp, "TX agg size %u, pkts %u, align %u\n",
size, pkts, sc->hn_rndis_agg_align);
}
for (i = 0; i < sc->hn_tx_ring_cnt; ++i) {
struct hn_tx_ring *txr = &sc->hn_tx_ring[i];
mtx_lock(&txr->hn_tx_lock);
txr->hn_agg_szmax = size;
txr->hn_agg_pktmax = pkts;
txr->hn_agg_align = sc->hn_rndis_agg_align;
mtx_unlock(&txr->hn_tx_lock);
}
}
static int
hn_get_txswq_depth(const struct hn_tx_ring *txr)
{
KASSERT(txr->hn_txdesc_cnt > 0, ("tx ring is not setup yet"));
if (hn_tx_swq_depth < txr->hn_txdesc_cnt)
return txr->hn_txdesc_cnt;
return hn_tx_swq_depth;
}
static int
hn_rss_reconfig(struct hn_softc *sc)
{
int error;
HN_LOCK_ASSERT(sc);
if ((sc->hn_flags & HN_FLAG_SYNTH_ATTACHED) == 0)
return (ENXIO);
/*
* Disable RSS first.
*
* NOTE:
* Direct reconfiguration by setting the UNCHG flags does
* _not_ work properly.
*/
if (bootverbose)
if_printf(sc->hn_ifp, "disable RSS\n");
error = hn_rndis_conf_rss(sc, NDIS_RSS_FLAG_DISABLE);
if (error) {
if_printf(sc->hn_ifp, "RSS disable failed\n");
return (error);
}
/*
* Reenable the RSS w/ the updated RSS key or indirect
* table.
*/
if (bootverbose)
if_printf(sc->hn_ifp, "reconfig RSS\n");
error = hn_rndis_conf_rss(sc, NDIS_RSS_FLAG_NONE);
if (error) {
if_printf(sc->hn_ifp, "RSS reconfig failed\n");
return (error);
}
return (0);
}
static void
hn_rss_ind_fixup(struct hn_softc *sc, int nchan)
{
struct ndis_rssprm_toeplitz *rss = &sc->hn_rss;
int i;
KASSERT(nchan > 1, ("invalid # of channels %d", nchan));
/*
* Check indirect table to make sure that all channels in it
* can be used.
*/
for (i = 0; i < NDIS_HASH_INDCNT; ++i) {
if (rss->rss_ind[i] >= nchan) {
if_printf(sc->hn_ifp,
"RSS indirect table %d fixup: %u -> %d\n",
i, rss->rss_ind[i], nchan - 1);
rss->rss_ind[i] = nchan - 1;
}
}
}
static int
hn_ifmedia_upd(struct ifnet *ifp __unused)
{
return EOPNOTSUPP;
}
static void
hn_ifmedia_sts(struct ifnet *ifp, struct ifmediareq *ifmr)
{
struct hn_softc *sc = ifp->if_softc;
ifmr->ifm_status = IFM_AVALID;
ifmr->ifm_active = IFM_ETHER;
if ((sc->hn_link_flags & HN_LINK_FLAG_LINKUP) == 0) {
ifmr->ifm_active |= IFM_NONE;
return;
}
ifmr->ifm_status |= IFM_ACTIVE;
ifmr->ifm_active |= IFM_10G_T | IFM_FDX;
}
/* {F8615163-DF3E-46c5-913F-F2D2F965ED0E} */
static const struct hyperv_guid g_net_vsc_device_type = {
.hv_guid = {0x63, 0x51, 0x61, 0xF8, 0x3E, 0xDF, 0xc5, 0x46,
0x91, 0x3F, 0xF2, 0xD2, 0xF9, 0x65, 0xED, 0x0E}
};
static int
hn_probe(device_t dev)
{
if (VMBUS_PROBE_GUID(device_get_parent(dev), dev,
&g_net_vsc_device_type) == 0) {
device_set_desc(dev, "Hyper-V Network Interface");
return BUS_PROBE_DEFAULT;
}
return ENXIO;
}
static int
hn_attach(device_t dev)
{
struct hn_softc *sc = device_get_softc(dev);
struct sysctl_oid_list *child;
struct sysctl_ctx_list *ctx;
uint8_t eaddr[ETHER_ADDR_LEN];
struct ifnet *ifp = NULL;
int error, ring_cnt, tx_ring_cnt;
sc->hn_dev = dev;
sc->hn_prichan = vmbus_get_channel(dev);
HN_LOCK_INIT(sc);
/*
* Initialize these tunables once.
*/
sc->hn_agg_size = hn_tx_agg_size;
sc->hn_agg_pkts = hn_tx_agg_pkts;
/*
* Setup taskqueue for transmission.
*/
if (hn_tx_taskq == NULL) {
sc->hn_tx_taskq = taskqueue_create("hn_tx", M_WAITOK,
taskqueue_thread_enqueue, &sc->hn_tx_taskq);
if (hn_bind_tx_taskq >= 0) {
int cpu = hn_bind_tx_taskq;
cpuset_t cpu_set;
if (cpu > mp_ncpus - 1)
cpu = mp_ncpus - 1;
CPU_SETOF(cpu, &cpu_set);
taskqueue_start_threads_cpuset(&sc->hn_tx_taskq, 1,
PI_NET, &cpu_set, "%s tx",
device_get_nameunit(dev));
} else {
taskqueue_start_threads(&sc->hn_tx_taskq, 1, PI_NET,
"%s tx", device_get_nameunit(dev));
}
} else {
sc->hn_tx_taskq = hn_tx_taskq;
}
/*
* Setup taskqueue for mangement tasks, e.g. link status.
*/
sc->hn_mgmt_taskq0 = taskqueue_create("hn_mgmt", M_WAITOK,
taskqueue_thread_enqueue, &sc->hn_mgmt_taskq0);
taskqueue_start_threads(&sc->hn_mgmt_taskq0, 1, PI_NET, "%s mgmt",
device_get_nameunit(dev));
TASK_INIT(&sc->hn_link_task, 0, hn_link_taskfunc, sc);
TASK_INIT(&sc->hn_netchg_init, 0, hn_netchg_init_taskfunc, sc);
TIMEOUT_TASK_INIT(sc->hn_mgmt_taskq0, &sc->hn_netchg_status, 0,
hn_netchg_status_taskfunc, sc);
/*
* Allocate ifnet and setup its name earlier, so that if_printf
* can be used by functions, which will be called after
* ether_ifattach().
*/
ifp = sc->hn_ifp = if_alloc(IFT_ETHER);
ifp->if_softc = sc;
if_initname(ifp, device_get_name(dev), device_get_unit(dev));
/*
* Initialize ifmedia earlier so that it can be unconditionally
* destroyed, if error happened later on.
*/
ifmedia_init(&sc->hn_media, 0, hn_ifmedia_upd, hn_ifmedia_sts);
/*
* Figure out the # of RX rings (ring_cnt) and the # of TX rings
* to use (tx_ring_cnt).
*
* NOTE:
* The # of RX rings to use is same as the # of channels to use.
*/
ring_cnt = hn_chan_cnt;
if (ring_cnt <= 0) {
/* Default */
ring_cnt = mp_ncpus;
if (ring_cnt > HN_RING_CNT_DEF_MAX)
ring_cnt = HN_RING_CNT_DEF_MAX;
} else if (ring_cnt > mp_ncpus) {
ring_cnt = mp_ncpus;
}
tx_ring_cnt = hn_tx_ring_cnt;
if (tx_ring_cnt <= 0 || tx_ring_cnt > ring_cnt)
tx_ring_cnt = ring_cnt;
#ifdef HN_IFSTART_SUPPORT
if (hn_use_if_start) {
/* ifnet.if_start only needs one TX ring. */
tx_ring_cnt = 1;
}
#endif
/*
* Set the leader CPU for channels.
*/
sc->hn_cpu = atomic_fetchadd_int(&hn_cpu_index, ring_cnt) % mp_ncpus;
/*
* Create enough TX/RX rings, even if only limited number of
* channels can be allocated.
*/
error = hn_create_tx_data(sc, tx_ring_cnt);
if (error)
goto failed;
error = hn_create_rx_data(sc, ring_cnt);
if (error)
goto failed;
/*
* Create transaction context for NVS and RNDIS transactions.
*/
sc->hn_xact = vmbus_xact_ctx_create(bus_get_dma_tag(dev),
HN_XACT_REQ_SIZE, HN_XACT_RESP_SIZE, 0);
if (sc->hn_xact == NULL) {
error = ENXIO;
goto failed;
}
/*
* Install orphan handler for the revocation of this device's
* primary channel.
*
* NOTE:
* The processing order is critical here:
* Install the orphan handler, _before_ testing whether this
* device's primary channel has been revoked or not.
*/
vmbus_chan_set_orphan(sc->hn_prichan, sc->hn_xact);
if (vmbus_chan_is_revoked(sc->hn_prichan)) {
error = ENXIO;
goto failed;
}
/*
* Attach the synthetic parts, i.e. NVS and RNDIS.
*/
error = hn_synth_attach(sc, ETHERMTU);
if (error)
goto failed;
error = hn_rndis_get_eaddr(sc, eaddr);
if (error)
goto failed;
#if __FreeBSD_version >= 1100099
if (sc->hn_rx_ring_inuse > 1) {
/*
* Reduce TCP segment aggregation limit for multiple
* RX rings to increase ACK timeliness.
*/
hn_set_lro_lenlim(sc, HN_LRO_LENLIM_MULTIRX_DEF);
}
#endif
/*
* Fixup TX stuffs after synthetic parts are attached.
*/
hn_fixup_tx_data(sc);
ctx = device_get_sysctl_ctx(dev);
child = SYSCTL_CHILDREN(device_get_sysctl_tree(dev));
SYSCTL_ADD_UINT(ctx, child, OID_AUTO, "nvs_version", CTLFLAG_RD,
&sc->hn_nvs_ver, 0, "NVS version");
SYSCTL_ADD_PROC(ctx, child, OID_AUTO, "ndis_version",
CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_MPSAFE, sc, 0,
hn_ndis_version_sysctl, "A", "NDIS version");
SYSCTL_ADD_PROC(ctx, child, OID_AUTO, "caps",
CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_MPSAFE, sc, 0,
hn_caps_sysctl, "A", "capabilities");
SYSCTL_ADD_PROC(ctx, child, OID_AUTO, "hwassist",
CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_MPSAFE, sc, 0,
hn_hwassist_sysctl, "A", "hwassist");
SYSCTL_ADD_PROC(ctx, child, OID_AUTO, "rxfilter",
CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_MPSAFE, sc, 0,
hn_rxfilter_sysctl, "A", "rxfilter");
SYSCTL_ADD_PROC(ctx, child, OID_AUTO, "rss_hash",
CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_MPSAFE, sc, 0,
hn_rss_hash_sysctl, "A", "RSS hash");
SYSCTL_ADD_INT(ctx, child, OID_AUTO, "rss_ind_size",
CTLFLAG_RD, &sc->hn_rss_ind_size, 0, "RSS indirect entry count");
SYSCTL_ADD_PROC(ctx, child, OID_AUTO, "rss_key",
CTLTYPE_OPAQUE | CTLFLAG_RW | CTLFLAG_MPSAFE, sc, 0,
hn_rss_key_sysctl, "IU", "RSS key");
SYSCTL_ADD_PROC(ctx, child, OID_AUTO, "rss_ind",
CTLTYPE_OPAQUE | CTLFLAG_RW | CTLFLAG_MPSAFE, sc, 0,
hn_rss_ind_sysctl, "IU", "RSS indirect table");
SYSCTL_ADD_UINT(ctx, child, OID_AUTO, "rndis_agg_size",
CTLFLAG_RD, &sc->hn_rndis_agg_size, 0,
"RNDIS offered packet transmission aggregation size limit");
SYSCTL_ADD_UINT(ctx, child, OID_AUTO, "rndis_agg_pkts",
CTLFLAG_RD, &sc->hn_rndis_agg_pkts, 0,
"RNDIS offered packet transmission aggregation count limit");
SYSCTL_ADD_UINT(ctx, child, OID_AUTO, "rndis_agg_align",
CTLFLAG_RD, &sc->hn_rndis_agg_align, 0,
"RNDIS packet transmission aggregation alignment");
SYSCTL_ADD_PROC(ctx, child, OID_AUTO, "agg_size",
CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_MPSAFE, sc, 0,
hn_txagg_size_sysctl, "I",
"Packet transmission aggregation size, 0 -- disable, -1 -- auto");
SYSCTL_ADD_PROC(ctx, child, OID_AUTO, "agg_pkts",
CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_MPSAFE, sc, 0,
hn_txagg_pkts_sysctl, "I",
"Packet transmission aggregation packets, "
"0 -- disable, -1 -- auto");
/*
* Setup the ifmedia, which has been initialized earlier.
*/
ifmedia_add(&sc->hn_media, IFM_ETHER | IFM_AUTO, 0, NULL);
ifmedia_set(&sc->hn_media, IFM_ETHER | IFM_AUTO);
/* XXX ifmedia_set really should do this for us */
sc->hn_media.ifm_media = sc->hn_media.ifm_cur->ifm_media;
/*
* Setup the ifnet for this interface.
*/
ifp->if_baudrate = IF_Gbps(10);
ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST;
ifp->if_ioctl = hn_ioctl;
ifp->if_init = hn_init;
#ifdef HN_IFSTART_SUPPORT
if (hn_use_if_start) {
int qdepth = hn_get_txswq_depth(&sc->hn_tx_ring[0]);
ifp->if_start = hn_start;
IFQ_SET_MAXLEN(&ifp->if_snd, qdepth);
ifp->if_snd.ifq_drv_maxlen = qdepth - 1;
IFQ_SET_READY(&ifp->if_snd);
} else
#endif
{
ifp->if_transmit = hn_transmit;
ifp->if_qflush = hn_xmit_qflush;
}
ifp->if_capabilities |= IFCAP_RXCSUM | IFCAP_LRO;
#ifdef foo
/* We can't diff IPv6 packets from IPv4 packets on RX path. */
ifp->if_capabilities |= IFCAP_RXCSUM_IPV6;
#endif
if (sc->hn_caps & HN_CAP_VLAN) {
/* XXX not sure about VLAN_MTU. */
ifp->if_capabilities |= IFCAP_VLAN_HWTAGGING | IFCAP_VLAN_MTU;
}
ifp->if_hwassist = sc->hn_tx_ring[0].hn_csum_assist;
if (ifp->if_hwassist & HN_CSUM_IP_MASK)
ifp->if_capabilities |= IFCAP_TXCSUM;
if (ifp->if_hwassist & HN_CSUM_IP6_MASK)
ifp->if_capabilities |= IFCAP_TXCSUM_IPV6;
if (sc->hn_caps & HN_CAP_TSO4) {
ifp->if_capabilities |= IFCAP_TSO4;
ifp->if_hwassist |= CSUM_IP_TSO;
}
if (sc->hn_caps & HN_CAP_TSO6) {
ifp->if_capabilities |= IFCAP_TSO6;
ifp->if_hwassist |= CSUM_IP6_TSO;
}
/* Enable all available capabilities by default. */
ifp->if_capenable = ifp->if_capabilities;
/*
* Disable IPv6 TSO and TXCSUM by default, they still can
* be enabled through SIOCSIFCAP.
*/
ifp->if_capenable &= ~(IFCAP_TXCSUM_IPV6 | IFCAP_TSO6);
ifp->if_hwassist &= ~(HN_CSUM_IP6_MASK | CSUM_IP6_TSO);
if (ifp->if_capabilities & (IFCAP_TSO6 | IFCAP_TSO4)) {
hn_set_tso_maxsize(sc, hn_tso_maxlen, ETHERMTU);
ifp->if_hw_tsomaxsegcount = HN_TX_DATA_SEGCNT_MAX;
ifp->if_hw_tsomaxsegsize = PAGE_SIZE;
}
ether_ifattach(ifp, eaddr);
if ((ifp->if_capabilities & (IFCAP_TSO6 | IFCAP_TSO4)) && bootverbose) {
if_printf(ifp, "TSO segcnt %u segsz %u\n",
ifp->if_hw_tsomaxsegcount, ifp->if_hw_tsomaxsegsize);
}
/* Inform the upper layer about the long frame support. */
ifp->if_hdrlen = sizeof(struct ether_vlan_header);
/*
* Kick off link status check.
*/
sc->hn_mgmt_taskq = sc->hn_mgmt_taskq0;
hn_update_link_status(sc);
return (0);
failed:
if (sc->hn_flags & HN_FLAG_SYNTH_ATTACHED)
hn_synth_detach(sc);
hn_detach(dev);
return (error);
}
static int
hn_detach(device_t dev)
{
struct hn_softc *sc = device_get_softc(dev);
struct ifnet *ifp = sc->hn_ifp;
if (sc->hn_xact != NULL && vmbus_chan_is_revoked(sc->hn_prichan)) {
/*
* In case that the vmbus missed the orphan handler
* installation.
*/
vmbus_xact_ctx_orphan(sc->hn_xact);
}
if (device_is_attached(dev)) {
HN_LOCK(sc);
if (sc->hn_flags & HN_FLAG_SYNTH_ATTACHED) {
if (ifp->if_drv_flags & IFF_DRV_RUNNING)
hn_stop(sc);
/*
* NOTE:
* hn_stop() only suspends data, so managment
* stuffs have to be suspended manually here.
*/
hn_suspend_mgmt(sc);
hn_synth_detach(sc);
}
HN_UNLOCK(sc);
ether_ifdetach(ifp);
}
ifmedia_removeall(&sc->hn_media);
hn_destroy_rx_data(sc);
hn_destroy_tx_data(sc);
if (sc->hn_tx_taskq != hn_tx_taskq)
taskqueue_free(sc->hn_tx_taskq);
taskqueue_free(sc->hn_mgmt_taskq0);
if (sc->hn_xact != NULL) {
/*
* Uninstall the orphan handler _before_ the xact is
* destructed.
*/
vmbus_chan_unset_orphan(sc->hn_prichan);
vmbus_xact_ctx_destroy(sc->hn_xact);
}
if_free(ifp);
HN_LOCK_DESTROY(sc);
return (0);
}
static int
hn_shutdown(device_t dev)
{
return (0);
}
static void
hn_link_status(struct hn_softc *sc)
{
uint32_t link_status;
int error;
error = hn_rndis_get_linkstatus(sc, &link_status);
if (error) {
/* XXX what to do? */
return;
}
if (link_status == NDIS_MEDIA_STATE_CONNECTED)
sc->hn_link_flags |= HN_LINK_FLAG_LINKUP;
else
sc->hn_link_flags &= ~HN_LINK_FLAG_LINKUP;
if_link_state_change(sc->hn_ifp,
(sc->hn_link_flags & HN_LINK_FLAG_LINKUP) ?
LINK_STATE_UP : LINK_STATE_DOWN);
}
static void
hn_link_taskfunc(void *xsc, int pending __unused)
{
struct hn_softc *sc = xsc;
if (sc->hn_link_flags & HN_LINK_FLAG_NETCHG)
return;
hn_link_status(sc);
}
static void
hn_netchg_init_taskfunc(void *xsc, int pending __unused)
{
struct hn_softc *sc = xsc;
/* Prevent any link status checks from running. */
sc->hn_link_flags |= HN_LINK_FLAG_NETCHG;
/*
* Fake up a [link down --> link up] state change; 5 seconds
* delay is used, which closely simulates miibus reaction
* upon link down event.
*/
sc->hn_link_flags &= ~HN_LINK_FLAG_LINKUP;
if_link_state_change(sc->hn_ifp, LINK_STATE_DOWN);
taskqueue_enqueue_timeout(sc->hn_mgmt_taskq0,
&sc->hn_netchg_status, 5 * hz);
}
static void
hn_netchg_status_taskfunc(void *xsc, int pending __unused)
{
struct hn_softc *sc = xsc;
/* Re-allow link status checks. */
sc->hn_link_flags &= ~HN_LINK_FLAG_NETCHG;
hn_link_status(sc);
}
static void
hn_update_link_status(struct hn_softc *sc)
{
if (sc->hn_mgmt_taskq != NULL)
taskqueue_enqueue(sc->hn_mgmt_taskq, &sc->hn_link_task);
}
static void
hn_change_network(struct hn_softc *sc)
{
if (sc->hn_mgmt_taskq != NULL)
taskqueue_enqueue(sc->hn_mgmt_taskq, &sc->hn_netchg_init);
}
static __inline int
hn_txdesc_dmamap_load(struct hn_tx_ring *txr, struct hn_txdesc *txd,
struct mbuf **m_head, bus_dma_segment_t *segs, int *nsegs)
{
struct mbuf *m = *m_head;
int error;
KASSERT(txd->chim_index == HN_NVS_CHIM_IDX_INVALID, ("txd uses chim"));
error = bus_dmamap_load_mbuf_sg(txr->hn_tx_data_dtag, txd->data_dmap,
m, segs, nsegs, BUS_DMA_NOWAIT);
if (error == EFBIG) {
struct mbuf *m_new;
m_new = m_collapse(m, M_NOWAIT, HN_TX_DATA_SEGCNT_MAX);
if (m_new == NULL)
return ENOBUFS;
else
*m_head = m = m_new;
txr->hn_tx_collapsed++;
error = bus_dmamap_load_mbuf_sg(txr->hn_tx_data_dtag,
txd->data_dmap, m, segs, nsegs, BUS_DMA_NOWAIT);
}
if (!error) {
bus_dmamap_sync(txr->hn_tx_data_dtag, txd->data_dmap,
BUS_DMASYNC_PREWRITE);
txd->flags |= HN_TXD_FLAG_DMAMAP;
}
return error;
}
static __inline int
hn_txdesc_put(struct hn_tx_ring *txr, struct hn_txdesc *txd)
{
KASSERT((txd->flags & HN_TXD_FLAG_ONLIST) == 0,
("put an onlist txd %#x", txd->flags));
KASSERT((txd->flags & HN_TXD_FLAG_ONAGG) == 0,
("put an onagg txd %#x", txd->flags));
KASSERT(txd->refs > 0, ("invalid txd refs %d", txd->refs));
if (atomic_fetchadd_int(&txd->refs, -1) != 1)
return 0;
if (!STAILQ_EMPTY(&txd->agg_list)) {
struct hn_txdesc *tmp_txd;
while ((tmp_txd = STAILQ_FIRST(&txd->agg_list)) != NULL) {
int freed;
KASSERT(STAILQ_EMPTY(&tmp_txd->agg_list),
("resursive aggregation on aggregated txdesc"));
KASSERT((tmp_txd->flags & HN_TXD_FLAG_ONAGG),
("not aggregated txdesc"));
KASSERT((tmp_txd->flags & HN_TXD_FLAG_DMAMAP) == 0,
("aggregated txdesc uses dmamap"));
KASSERT(tmp_txd->chim_index == HN_NVS_CHIM_IDX_INVALID,
("aggregated txdesc consumes "
"chimney sending buffer"));
KASSERT(tmp_txd->chim_size == 0,
("aggregated txdesc has non-zero "
"chimney sending size"));
STAILQ_REMOVE_HEAD(&txd->agg_list, agg_link);
tmp_txd->flags &= ~HN_TXD_FLAG_ONAGG;
freed = hn_txdesc_put(txr, tmp_txd);
KASSERT(freed, ("failed to free aggregated txdesc"));
}
}
if (txd->chim_index != HN_NVS_CHIM_IDX_INVALID) {
KASSERT((txd->flags & HN_TXD_FLAG_DMAMAP) == 0,
("chim txd uses dmamap"));
hn_chim_free(txr->hn_sc, txd->chim_index);
txd->chim_index = HN_NVS_CHIM_IDX_INVALID;
txd->chim_size = 0;
} else if (txd->flags & HN_TXD_FLAG_DMAMAP) {
bus_dmamap_sync(txr->hn_tx_data_dtag,
txd->data_dmap, BUS_DMASYNC_POSTWRITE);
bus_dmamap_unload(txr->hn_tx_data_dtag,
txd->data_dmap);
txd->flags &= ~HN_TXD_FLAG_DMAMAP;
}
if (txd->m != NULL) {
m_freem(txd->m);
txd->m = NULL;
}
txd->flags |= HN_TXD_FLAG_ONLIST;
#ifndef HN_USE_TXDESC_BUFRING
mtx_lock_spin(&txr->hn_txlist_spin);
KASSERT(txr->hn_txdesc_avail >= 0 &&
txr->hn_txdesc_avail < txr->hn_txdesc_cnt,
("txdesc_put: invalid txd avail %d", txr->hn_txdesc_avail));
txr->hn_txdesc_avail++;
SLIST_INSERT_HEAD(&txr->hn_txlist, txd, link);
mtx_unlock_spin(&txr->hn_txlist_spin);
#else
atomic_add_int(&txr->hn_txdesc_avail, 1);
buf_ring_enqueue(txr->hn_txdesc_br, txd);
#endif
return 1;
}
static __inline struct hn_txdesc *
hn_txdesc_get(struct hn_tx_ring *txr)
{
struct hn_txdesc *txd;
#ifndef HN_USE_TXDESC_BUFRING
mtx_lock_spin(&txr->hn_txlist_spin);
txd = SLIST_FIRST(&txr->hn_txlist);
if (txd != NULL) {
KASSERT(txr->hn_txdesc_avail > 0,
("txdesc_get: invalid txd avail %d", txr->hn_txdesc_avail));
txr->hn_txdesc_avail--;
SLIST_REMOVE_HEAD(&txr->hn_txlist, link);
}
mtx_unlock_spin(&txr->hn_txlist_spin);
#else
txd = buf_ring_dequeue_sc(txr->hn_txdesc_br);
#endif
if (txd != NULL) {
#ifdef HN_USE_TXDESC_BUFRING
atomic_subtract_int(&txr->hn_txdesc_avail, 1);
#endif
KASSERT(txd->m == NULL && txd->refs == 0 &&
STAILQ_EMPTY(&txd->agg_list) &&
txd->chim_index == HN_NVS_CHIM_IDX_INVALID &&
txd->chim_size == 0 &&
(txd->flags & HN_TXD_FLAG_ONLIST) &&
(txd->flags & HN_TXD_FLAG_ONAGG) == 0 &&
(txd->flags & HN_TXD_FLAG_DMAMAP) == 0, ("invalid txd"));
txd->flags &= ~HN_TXD_FLAG_ONLIST;
txd->refs = 1;
}
return txd;
}
static __inline void
hn_txdesc_hold(struct hn_txdesc *txd)
{
/* 0->1 transition will never work */
KASSERT(txd->refs > 0, ("invalid txd refs %d", txd->refs));
atomic_add_int(&txd->refs, 1);
}
static __inline void
hn_txdesc_agg(struct hn_txdesc *agg_txd, struct hn_txdesc *txd)
{
KASSERT((agg_txd->flags & HN_TXD_FLAG_ONAGG) == 0,
("recursive aggregation on aggregating txdesc"));
KASSERT((txd->flags & HN_TXD_FLAG_ONAGG) == 0,
("already aggregated"));
KASSERT(STAILQ_EMPTY(&txd->agg_list),
("recursive aggregation on to-be-aggregated txdesc"));
txd->flags |= HN_TXD_FLAG_ONAGG;
STAILQ_INSERT_TAIL(&agg_txd->agg_list, txd, agg_link);
}
static bool
hn_tx_ring_pending(struct hn_tx_ring *txr)
{
bool pending = false;
#ifndef HN_USE_TXDESC_BUFRING
mtx_lock_spin(&txr->hn_txlist_spin);
if (txr->hn_txdesc_avail != txr->hn_txdesc_cnt)
pending = true;
mtx_unlock_spin(&txr->hn_txlist_spin);
#else
if (!buf_ring_full(txr->hn_txdesc_br))
pending = true;
#endif
return (pending);
}
static __inline void
hn_txeof(struct hn_tx_ring *txr)
{
txr->hn_has_txeof = 0;
txr->hn_txeof(txr);
}
static void
hn_txpkt_done(struct hn_nvs_sendctx *sndc, struct hn_softc *sc,
struct vmbus_channel *chan, const void *data __unused, int dlen __unused)
{
struct hn_txdesc *txd = sndc->hn_cbarg;
struct hn_tx_ring *txr;
txr = txd->txr;
KASSERT(txr->hn_chan == chan,
("channel mismatch, on chan%u, should be chan%u",
vmbus_chan_subidx(chan), vmbus_chan_subidx(txr->hn_chan)));
txr->hn_has_txeof = 1;
hn_txdesc_put(txr, txd);
++txr->hn_txdone_cnt;
if (txr->hn_txdone_cnt >= HN_EARLY_TXEOF_THRESH) {
txr->hn_txdone_cnt = 0;
if (txr->hn_oactive)
hn_txeof(txr);
}
}
static void
hn_chan_rollup(struct hn_rx_ring *rxr, struct hn_tx_ring *txr)
{
#if defined(INET) || defined(INET6)
tcp_lro_flush_all(&rxr->hn_lro);
#endif
/*
* NOTE:
* 'txr' could be NULL, if multiple channels and
* ifnet.if_start method are enabled.
*/
if (txr == NULL || !txr->hn_has_txeof)
return;
txr->hn_txdone_cnt = 0;
hn_txeof(txr);
}
static __inline uint32_t
hn_rndis_pktmsg_offset(uint32_t ofs)
{
KASSERT(ofs >= sizeof(struct rndis_packet_msg),
("invalid RNDIS packet msg offset %u", ofs));
return (ofs - __offsetof(struct rndis_packet_msg, rm_dataoffset));
}
static __inline void *
hn_rndis_pktinfo_append(struct rndis_packet_msg *pkt, size_t pktsize,
size_t pi_dlen, uint32_t pi_type)
{
const size_t pi_size = HN_RNDIS_PKTINFO_SIZE(pi_dlen);
struct rndis_pktinfo *pi;
KASSERT((pi_size & RNDIS_PACKET_MSG_OFFSET_ALIGNMASK) == 0,
("unaligned pktinfo size %zu, pktinfo dlen %zu", pi_size, pi_dlen));
/*
* Per-packet-info does not move; it only grows.
*
* NOTE:
* rm_pktinfooffset in this phase counts from the beginning
* of rndis_packet_msg.
*/
KASSERT(pkt->rm_pktinfooffset + pkt->rm_pktinfolen + pi_size <= pktsize,
("%u pktinfo overflows RNDIS packet msg", pi_type));
pi = (struct rndis_pktinfo *)((uint8_t *)pkt + pkt->rm_pktinfooffset +
pkt->rm_pktinfolen);
pkt->rm_pktinfolen += pi_size;
pi->rm_size = pi_size;
pi->rm_type = pi_type;
pi->rm_pktinfooffset = RNDIS_PKTINFO_OFFSET;
/* Data immediately follow per-packet-info. */
pkt->rm_dataoffset += pi_size;
/* Update RNDIS packet msg length */
pkt->rm_len += pi_size;
return (pi->rm_data);
}
static __inline int
hn_flush_txagg(struct ifnet *ifp, struct hn_tx_ring *txr)
{
struct hn_txdesc *txd;
struct mbuf *m;
int error, pkts;
txd = txr->hn_agg_txd;
KASSERT(txd != NULL, ("no aggregate txdesc"));
/*
* Since hn_txpkt() will reset this temporary stat, save
* it now, so that oerrors can be updated properly, if
* hn_txpkt() ever fails.
*/
pkts = txr->hn_stat_pkts;
/*
* Since txd's mbuf will _not_ be freed upon hn_txpkt()
* failure, save it for later freeing, if hn_txpkt() ever
* fails.
*/
m = txd->m;
error = hn_txpkt(ifp, txr, txd);
if (__predict_false(error)) {
/* txd is freed, but m is not. */
m_freem(m);
txr->hn_flush_failed++;
if_inc_counter(ifp, IFCOUNTER_OERRORS, pkts);
}
/* Reset all aggregation states. */
txr->hn_agg_txd = NULL;
txr->hn_agg_szleft = 0;
txr->hn_agg_pktleft = 0;
txr->hn_agg_prevpkt = NULL;
return (error);
}
static void *
hn_try_txagg(struct ifnet *ifp, struct hn_tx_ring *txr, struct hn_txdesc *txd,
int pktsize)
{
void *chim;
if (txr->hn_agg_txd != NULL) {
if (txr->hn_agg_pktleft >= 1 && txr->hn_agg_szleft > pktsize) {
struct hn_txdesc *agg_txd = txr->hn_agg_txd;
struct rndis_packet_msg *pkt = txr->hn_agg_prevpkt;
int olen;
/*
* Update the previous RNDIS packet's total length,
* it can be increased due to the mandatory alignment
* padding for this RNDIS packet. And update the
* aggregating txdesc's chimney sending buffer size
* accordingly.
*
* XXX
* Zero-out the padding, as required by the RNDIS spec.
*/
olen = pkt->rm_len;
pkt->rm_len = roundup2(olen, txr->hn_agg_align);
agg_txd->chim_size += pkt->rm_len - olen;
/* Link this txdesc to the parent. */
hn_txdesc_agg(agg_txd, txd);
chim = (uint8_t *)pkt + pkt->rm_len;
/* Save the current packet for later fixup. */
txr->hn_agg_prevpkt = chim;
txr->hn_agg_pktleft--;
txr->hn_agg_szleft -= pktsize;
if (txr->hn_agg_szleft <=
HN_PKTSIZE_MIN(txr->hn_agg_align)) {
/*
* Probably can't aggregate more packets,
* flush this aggregating txdesc proactively.
*/
txr->hn_agg_pktleft = 0;
}
/* Done! */
return (chim);
}
hn_flush_txagg(ifp, txr);
}
KASSERT(txr->hn_agg_txd == NULL, ("lingering aggregating txdesc"));
txr->hn_tx_chimney_tried++;
txd->chim_index = hn_chim_alloc(txr->hn_sc);
if (txd->chim_index == HN_NVS_CHIM_IDX_INVALID)
return (NULL);
txr->hn_tx_chimney++;
chim = txr->hn_sc->hn_chim +
(txd->chim_index * txr->hn_sc->hn_chim_szmax);
if (txr->hn_agg_pktmax > 1 &&
txr->hn_agg_szmax > pktsize + HN_PKTSIZE_MIN(txr->hn_agg_align)) {
txr->hn_agg_txd = txd;
txr->hn_agg_pktleft = txr->hn_agg_pktmax - 1;
txr->hn_agg_szleft = txr->hn_agg_szmax - pktsize;
txr->hn_agg_prevpkt = chim;
}
return (chim);
}
/*
* NOTE:
* If this function fails, then both txd and m_head0 will be freed.
*/
static int
hn_encap(struct ifnet *ifp, struct hn_tx_ring *txr, struct hn_txdesc *txd,
struct mbuf **m_head0)
{
bus_dma_segment_t segs[HN_TX_DATA_SEGCNT_MAX];
int error, nsegs, i;
struct mbuf *m_head = *m_head0;
struct rndis_packet_msg *pkt;
uint32_t *pi_data;
void *chim = NULL;
int pkt_hlen, pkt_size;
pkt = txd->rndis_pkt;
pkt_size = HN_PKTSIZE(m_head, txr->hn_agg_align);
if (pkt_size < txr->hn_chim_size) {
chim = hn_try_txagg(ifp, txr, txd, pkt_size);
if (chim != NULL)
pkt = chim;
} else {
if (txr->hn_agg_txd != NULL)
hn_flush_txagg(ifp, txr);
}
pkt->rm_type = REMOTE_NDIS_PACKET_MSG;
pkt->rm_len = sizeof(*pkt) + m_head->m_pkthdr.len;
pkt->rm_dataoffset = sizeof(*pkt);
pkt->rm_datalen = m_head->m_pkthdr.len;
pkt->rm_oobdataoffset = 0;
pkt->rm_oobdatalen = 0;
pkt->rm_oobdataelements = 0;
pkt->rm_pktinfooffset = sizeof(*pkt);
pkt->rm_pktinfolen = 0;
pkt->rm_vchandle = 0;
pkt->rm_reserved = 0;
if (txr->hn_tx_flags & HN_TX_FLAG_HASHVAL) {
/*
* Set the hash value for this packet, so that the host could
* dispatch the TX done event for this packet back to this TX
* ring's channel.
*/
pi_data = hn_rndis_pktinfo_append(pkt, HN_RNDIS_PKT_LEN,
HN_NDIS_HASH_VALUE_SIZE, HN_NDIS_PKTINFO_TYPE_HASHVAL);
*pi_data = txr->hn_tx_idx;
}
if (m_head->m_flags & M_VLANTAG) {
pi_data = hn_rndis_pktinfo_append(pkt, HN_RNDIS_PKT_LEN,
NDIS_VLAN_INFO_SIZE, NDIS_PKTINFO_TYPE_VLAN);
*pi_data = NDIS_VLAN_INFO_MAKE(
EVL_VLANOFTAG(m_head->m_pkthdr.ether_vtag),
EVL_PRIOFTAG(m_head->m_pkthdr.ether_vtag),
EVL_CFIOFTAG(m_head->m_pkthdr.ether_vtag));
}
if (m_head->m_pkthdr.csum_flags & CSUM_TSO) {
#if defined(INET6) || defined(INET)
pi_data = hn_rndis_pktinfo_append(pkt, HN_RNDIS_PKT_LEN,
NDIS_LSO2_INFO_SIZE, NDIS_PKTINFO_TYPE_LSO);
#ifdef INET
if (m_head->m_pkthdr.csum_flags & CSUM_IP_TSO) {
*pi_data = NDIS_LSO2_INFO_MAKEIPV4(0,
m_head->m_pkthdr.tso_segsz);
}
#endif
#if defined(INET6) && defined(INET)
else
#endif
#ifdef INET6
{
*pi_data = NDIS_LSO2_INFO_MAKEIPV6(0,
m_head->m_pkthdr.tso_segsz);
}
#endif
#endif /* INET6 || INET */
} else if (m_head->m_pkthdr.csum_flags & txr->hn_csum_assist) {
pi_data = hn_rndis_pktinfo_append(pkt, HN_RNDIS_PKT_LEN,
NDIS_TXCSUM_INFO_SIZE, NDIS_PKTINFO_TYPE_CSUM);
if (m_head->m_pkthdr.csum_flags &
(CSUM_IP6_TCP | CSUM_IP6_UDP)) {
*pi_data = NDIS_TXCSUM_INFO_IPV6;
} else {
*pi_data = NDIS_TXCSUM_INFO_IPV4;
if (m_head->m_pkthdr.csum_flags & CSUM_IP)
*pi_data |= NDIS_TXCSUM_INFO_IPCS;
}
if (m_head->m_pkthdr.csum_flags & (CSUM_IP_TCP | CSUM_IP6_TCP))
*pi_data |= NDIS_TXCSUM_INFO_TCPCS;
else if (m_head->m_pkthdr.csum_flags &
(CSUM_IP_UDP | CSUM_IP6_UDP))
*pi_data |= NDIS_TXCSUM_INFO_UDPCS;
}
pkt_hlen = pkt->rm_pktinfooffset + pkt->rm_pktinfolen;
/* Convert RNDIS packet message offsets */
pkt->rm_dataoffset = hn_rndis_pktmsg_offset(pkt->rm_dataoffset);
pkt->rm_pktinfooffset = hn_rndis_pktmsg_offset(pkt->rm_pktinfooffset);
/*
* Fast path: Chimney sending.
*/
if (chim != NULL) {
struct hn_txdesc *tgt_txd = txd;
if (txr->hn_agg_txd != NULL) {
tgt_txd = txr->hn_agg_txd;
#ifdef INVARIANTS
*m_head0 = NULL;
#endif
}
KASSERT(pkt == chim,
("RNDIS pkt not in chimney sending buffer"));
KASSERT(tgt_txd->chim_index != HN_NVS_CHIM_IDX_INVALID,
("chimney sending buffer is not used"));
tgt_txd->chim_size += pkt->rm_len;
m_copydata(m_head, 0, m_head->m_pkthdr.len,
((uint8_t *)chim) + pkt_hlen);
txr->hn_gpa_cnt = 0;
txr->hn_sendpkt = hn_txpkt_chim;
goto done;
}
KASSERT(txr->hn_agg_txd == NULL, ("aggregating sglist txdesc"));
KASSERT(txd->chim_index == HN_NVS_CHIM_IDX_INVALID,
("chimney buffer is used"));
KASSERT(pkt == txd->rndis_pkt, ("RNDIS pkt not in txdesc"));
error = hn_txdesc_dmamap_load(txr, txd, &m_head, segs, &nsegs);
if (__predict_false(error)) {
int freed;
/*
* This mbuf is not linked w/ the txd yet, so free it now.
*/
m_freem(m_head);
*m_head0 = NULL;
freed = hn_txdesc_put(txr, txd);
KASSERT(freed != 0,
("fail to free txd upon txdma error"));
txr->hn_txdma_failed++;
if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
return error;
}
*m_head0 = m_head;
/* +1 RNDIS packet message */
txr->hn_gpa_cnt = nsegs + 1;
/* send packet with page buffer */
txr->hn_gpa[0].gpa_page = atop(txd->rndis_pkt_paddr);
txr->hn_gpa[0].gpa_ofs = txd->rndis_pkt_paddr & PAGE_MASK;
txr->hn_gpa[0].gpa_len = pkt_hlen;
/*
* Fill the page buffers with mbuf info after the page
* buffer for RNDIS packet message.
*/
for (i = 0; i < nsegs; ++i) {
struct vmbus_gpa *gpa = &txr->hn_gpa[i + 1];
gpa->gpa_page = atop(segs[i].ds_addr);
gpa->gpa_ofs = segs[i].ds_addr & PAGE_MASK;
gpa->gpa_len = segs[i].ds_len;
}
txd->chim_index = HN_NVS_CHIM_IDX_INVALID;
txd->chim_size = 0;
txr->hn_sendpkt = hn_txpkt_sglist;
done:
txd->m = m_head;
/* Set the completion routine */
hn_nvs_sendctx_init(&txd->send_ctx, hn_txpkt_done, txd);
/* Update temporary stats for later use. */
txr->hn_stat_pkts++;
txr->hn_stat_size += m_head->m_pkthdr.len;
if (m_head->m_flags & M_MCAST)
txr->hn_stat_mcasts++;
return 0;
}
/*
* NOTE:
* If this function fails, then txd will be freed, but the mbuf
* associated w/ the txd will _not_ be freed.
*/
static int
hn_txpkt(struct ifnet *ifp, struct hn_tx_ring *txr, struct hn_txdesc *txd)
{
int error, send_failed = 0;
again:
/*
* Make sure that this txd and any aggregated txds are not freed
* before ETHER_BPF_MTAP.
*/
hn_txdesc_hold(txd);
error = txr->hn_sendpkt(txr, txd);
if (!error) {
if (bpf_peers_present(ifp->if_bpf)) {
const struct hn_txdesc *tmp_txd;
ETHER_BPF_MTAP(ifp, txd->m);
STAILQ_FOREACH(tmp_txd, &txd->agg_list, agg_link)
ETHER_BPF_MTAP(ifp, tmp_txd->m);
}
if_inc_counter(ifp, IFCOUNTER_OPACKETS, txr->hn_stat_pkts);
#ifdef HN_IFSTART_SUPPORT
if (!hn_use_if_start)
#endif
{
if_inc_counter(ifp, IFCOUNTER_OBYTES,
txr->hn_stat_size);
if (txr->hn_stat_mcasts != 0) {
if_inc_counter(ifp, IFCOUNTER_OMCASTS,
txr->hn_stat_mcasts);
}
}
txr->hn_pkts += txr->hn_stat_pkts;
txr->hn_sends++;
}
hn_txdesc_put(txr, txd);
if (__predict_false(error)) {
int freed;
/*
* This should "really rarely" happen.
*
* XXX Too many RX to be acked or too many sideband
* commands to run? Ask netvsc_channel_rollup()
* to kick start later.
*/
txr->hn_has_txeof = 1;
if (!send_failed) {
txr->hn_send_failed++;
send_failed = 1;
/*
* Try sending again after set hn_has_txeof;
* in case that we missed the last
* netvsc_channel_rollup().
*/
goto again;
}
if_printf(ifp, "send failed\n");
/*
* Caller will perform further processing on the
* associated mbuf, so don't free it in hn_txdesc_put();
* only unload it from the DMA map in hn_txdesc_put(),
* if it was loaded.
*/
txd->m = NULL;
freed = hn_txdesc_put(txr, txd);
KASSERT(freed != 0,
("fail to free txd upon send error"));
txr->hn_send_failed++;
}
/* Reset temporary stats, after this sending is done. */
txr->hn_stat_size = 0;
txr->hn_stat_pkts = 0;
txr->hn_stat_mcasts = 0;
return (error);
}
/*
* Append the specified data to the indicated mbuf chain,
* Extend the mbuf chain if the new data does not fit in
* existing space.
*
* This is a minor rewrite of m_append() from sys/kern/uipc_mbuf.c.
* There should be an equivalent in the kernel mbuf code,
* but there does not appear to be one yet.
*
* Differs from m_append() in that additional mbufs are
* allocated with cluster size MJUMPAGESIZE, and filled
* accordingly.
*
* Return 1 if able to complete the job; otherwise 0.
*/
static int
hv_m_append(struct mbuf *m0, int len, c_caddr_t cp)
{
struct mbuf *m, *n;
int remainder, space;
for (m = m0; m->m_next != NULL; m = m->m_next)
;
remainder = len;
space = M_TRAILINGSPACE(m);
if (space > 0) {
/*
* Copy into available space.
*/
if (space > remainder)
space = remainder;
bcopy(cp, mtod(m, caddr_t) + m->m_len, space);
m->m_len += space;
cp += space;
remainder -= space;
}
while (remainder > 0) {
/*
* Allocate a new mbuf; could check space
* and allocate a cluster instead.
*/
n = m_getjcl(M_NOWAIT, m->m_type, 0, MJUMPAGESIZE);
if (n == NULL)
break;
n->m_len = min(MJUMPAGESIZE, remainder);
bcopy(cp, mtod(n, caddr_t), n->m_len);
cp += n->m_len;
remainder -= n->m_len;
m->m_next = n;
m = n;
}
if (m0->m_flags & M_PKTHDR)
m0->m_pkthdr.len += len - remainder;
return (remainder == 0);
}
#if defined(INET) || defined(INET6)
static __inline int
hn_lro_rx(struct lro_ctrl *lc, struct mbuf *m)
{
#if __FreeBSD_version >= 1100095
if (hn_lro_mbufq_depth) {
tcp_lro_queue_mbuf(lc, m);
return 0;
}
#endif
return tcp_lro_rx(lc, m, 0);
}
#endif
static int
hn_rxpkt(struct hn_rx_ring *rxr, const void *data, int dlen,
const struct hn_rxinfo *info)
{
struct ifnet *ifp = rxr->hn_ifp;
struct mbuf *m_new;
int size, do_lro = 0, do_csum = 1;
int hash_type;
if (!(ifp->if_drv_flags & IFF_DRV_RUNNING))
return (0);
/*
* Bail out if packet contains more data than configured MTU.
*/
if (dlen > (ifp->if_mtu + ETHER_HDR_LEN)) {
return (0);
} else if (dlen <= MHLEN) {
m_new = m_gethdr(M_NOWAIT, MT_DATA);
if (m_new == NULL) {
if_inc_counter(ifp, IFCOUNTER_IQDROPS, 1);
return (0);
}
memcpy(mtod(m_new, void *), data, dlen);
m_new->m_pkthdr.len = m_new->m_len = dlen;
rxr->hn_small_pkts++;
} else {
/*
* Get an mbuf with a cluster. For packets 2K or less,
* get a standard 2K cluster. For anything larger, get a
* 4K cluster. Any buffers larger than 4K can cause problems
* if looped around to the Hyper-V TX channel, so avoid them.
*/
size = MCLBYTES;
if (dlen > MCLBYTES) {
/* 4096 */
size = MJUMPAGESIZE;
}
m_new = m_getjcl(M_NOWAIT, MT_DATA, M_PKTHDR, size);
if (m_new == NULL) {
if_inc_counter(ifp, IFCOUNTER_IQDROPS, 1);
return (0);
}
hv_m_append(m_new, dlen, data);
}
m_new->m_pkthdr.rcvif = ifp;
if (__predict_false((ifp->if_capenable & IFCAP_RXCSUM) == 0))
do_csum = 0;
/* receive side checksum offload */
if (info->csum_info != HN_NDIS_RXCSUM_INFO_INVALID) {
/* IP csum offload */
if ((info->csum_info & NDIS_RXCSUM_INFO_IPCS_OK) && do_csum) {
m_new->m_pkthdr.csum_flags |=
(CSUM_IP_CHECKED | CSUM_IP_VALID);
rxr->hn_csum_ip++;
}
/* TCP/UDP csum offload */
if ((info->csum_info & (NDIS_RXCSUM_INFO_UDPCS_OK |
NDIS_RXCSUM_INFO_TCPCS_OK)) && do_csum) {
m_new->m_pkthdr.csum_flags |=
(CSUM_DATA_VALID | CSUM_PSEUDO_HDR);
m_new->m_pkthdr.csum_data = 0xffff;
if (info->csum_info & NDIS_RXCSUM_INFO_TCPCS_OK)
rxr->hn_csum_tcp++;
else
rxr->hn_csum_udp++;
}
/*
* XXX
* As of this write (Oct 28th, 2016), host side will turn
* on only TCPCS_OK and IPCS_OK even for UDP datagrams, so
* the do_lro setting here is actually _not_ accurate. We
* depend on the RSS hash type check to reset do_lro.
*/
if ((info->csum_info &
(NDIS_RXCSUM_INFO_TCPCS_OK | NDIS_RXCSUM_INFO_IPCS_OK)) ==
(NDIS_RXCSUM_INFO_TCPCS_OK | NDIS_RXCSUM_INFO_IPCS_OK))
do_lro = 1;
} else {
const struct ether_header *eh;
uint16_t etype;
int hoff;
hoff = sizeof(*eh);
if (m_new->m_len < hoff)
goto skip;
eh = mtod(m_new, struct ether_header *);
etype = ntohs(eh->ether_type);
if (etype == ETHERTYPE_VLAN) {
const struct ether_vlan_header *evl;
hoff = sizeof(*evl);
if (m_new->m_len < hoff)
goto skip;
evl = mtod(m_new, struct ether_vlan_header *);
etype = ntohs(evl->evl_proto);
}
if (etype == ETHERTYPE_IP) {
int pr;
pr = hn_check_iplen(m_new, hoff);
if (pr == IPPROTO_TCP) {
if (do_csum &&
(rxr->hn_trust_hcsum &
HN_TRUST_HCSUM_TCP)) {
rxr->hn_csum_trusted++;
m_new->m_pkthdr.csum_flags |=
(CSUM_IP_CHECKED | CSUM_IP_VALID |
CSUM_DATA_VALID | CSUM_PSEUDO_HDR);
m_new->m_pkthdr.csum_data = 0xffff;
}
do_lro = 1;
} else if (pr == IPPROTO_UDP) {
if (do_csum &&
(rxr->hn_trust_hcsum &
HN_TRUST_HCSUM_UDP)) {
rxr->hn_csum_trusted++;
m_new->m_pkthdr.csum_flags |=
(CSUM_IP_CHECKED | CSUM_IP_VALID |
CSUM_DATA_VALID | CSUM_PSEUDO_HDR);
m_new->m_pkthdr.csum_data = 0xffff;
}
} else if (pr != IPPROTO_DONE && do_csum &&
(rxr->hn_trust_hcsum & HN_TRUST_HCSUM_IP)) {
rxr->hn_csum_trusted++;
m_new->m_pkthdr.csum_flags |=
(CSUM_IP_CHECKED | CSUM_IP_VALID);
}
}
}
skip:
if (info->vlan_info != HN_NDIS_VLAN_INFO_INVALID) {
m_new->m_pkthdr.ether_vtag = EVL_MAKETAG(
NDIS_VLAN_INFO_ID(info->vlan_info),
NDIS_VLAN_INFO_PRI(info->vlan_info),
NDIS_VLAN_INFO_CFI(info->vlan_info));
m_new->m_flags |= M_VLANTAG;
}
if (info->hash_info != HN_NDIS_HASH_INFO_INVALID) {
rxr->hn_rss_pkts++;
m_new->m_pkthdr.flowid = info->hash_value;
hash_type = M_HASHTYPE_OPAQUE_HASH;
if ((info->hash_info & NDIS_HASH_FUNCTION_MASK) ==
NDIS_HASH_FUNCTION_TOEPLITZ) {
uint32_t type = (info->hash_info & NDIS_HASH_TYPE_MASK);
/*
* NOTE:
* do_lro is resetted, if the hash types are not TCP
* related. See the comment in the above csum_flags
* setup section.
*/
switch (type) {
case NDIS_HASH_IPV4:
hash_type = M_HASHTYPE_RSS_IPV4;
do_lro = 0;
break;
case NDIS_HASH_TCP_IPV4:
hash_type = M_HASHTYPE_RSS_TCP_IPV4;
break;
case NDIS_HASH_IPV6:
hash_type = M_HASHTYPE_RSS_IPV6;
do_lro = 0;
break;
case NDIS_HASH_IPV6_EX:
hash_type = M_HASHTYPE_RSS_IPV6_EX;
do_lro = 0;
break;
case NDIS_HASH_TCP_IPV6:
hash_type = M_HASHTYPE_RSS_TCP_IPV6;
break;
case NDIS_HASH_TCP_IPV6_EX:
hash_type = M_HASHTYPE_RSS_TCP_IPV6_EX;
break;
}
}
} else {
m_new->m_pkthdr.flowid = rxr->hn_rx_idx;
hash_type = M_HASHTYPE_OPAQUE;
}
M_HASHTYPE_SET(m_new, hash_type);
/*
* Note: Moved RX completion back to hv_nv_on_receive() so all
* messages (not just data messages) will trigger a response.
*/
if_inc_counter(ifp, IFCOUNTER_IPACKETS, 1);
rxr->hn_pkts++;
if ((ifp->if_capenable & IFCAP_LRO) && do_lro) {
#if defined(INET) || defined(INET6)
struct lro_ctrl *lro = &rxr->hn_lro;
if (lro->lro_cnt) {
rxr->hn_lro_tried++;
if (hn_lro_rx(lro, m_new) == 0) {
/* DONE! */
return 0;
}
}
#endif
}
/* We're not holding the lock here, so don't release it */
(*ifp->if_input)(ifp, m_new);
return (0);
}
static int
hn_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data)
{
struct hn_softc *sc = ifp->if_softc;
struct ifreq *ifr = (struct ifreq *)data;
int mask, error = 0;
switch (cmd) {
case SIOCSIFMTU:
if (ifr->ifr_mtu > HN_MTU_MAX) {
error = EINVAL;
break;
}
HN_LOCK(sc);
if ((sc->hn_flags & HN_FLAG_SYNTH_ATTACHED) == 0) {
HN_UNLOCK(sc);
break;
}
if ((sc->hn_caps & HN_CAP_MTU) == 0) {
/* Can't change MTU */
HN_UNLOCK(sc);
error = EOPNOTSUPP;
break;
}
if (ifp->if_mtu == ifr->ifr_mtu) {
HN_UNLOCK(sc);
break;
}
/*
* Suspend this interface before the synthetic parts
* are ripped.
*/
hn_suspend(sc);
/*
* Detach the synthetics parts, i.e. NVS and RNDIS.
*/
hn_synth_detach(sc);
/*
* Reattach the synthetic parts, i.e. NVS and RNDIS,
* with the new MTU setting.
*/
error = hn_synth_attach(sc, ifr->ifr_mtu);
if (error) {
HN_UNLOCK(sc);
break;
}
/*
* Commit the requested MTU, after the synthetic parts
* have been successfully attached.
*/
ifp->if_mtu = ifr->ifr_mtu;
/*
* Make sure that various parameters based on MTU are
* still valid, after the MTU change.
*/
if (sc->hn_tx_ring[0].hn_chim_size > sc->hn_chim_szmax)
hn_set_chim_size(sc, sc->hn_chim_szmax);
hn_set_tso_maxsize(sc, hn_tso_maxlen, ifp->if_mtu);
#if __FreeBSD_version >= 1100099
if (sc->hn_rx_ring[0].hn_lro.lro_length_lim <
HN_LRO_LENLIM_MIN(ifp))
hn_set_lro_lenlim(sc, HN_LRO_LENLIM_MIN(ifp));
#endif
/*
* All done! Resume the interface now.
*/
hn_resume(sc);
HN_UNLOCK(sc);
break;
case SIOCSIFFLAGS:
HN_LOCK(sc);
if ((sc->hn_flags & HN_FLAG_SYNTH_ATTACHED) == 0) {
HN_UNLOCK(sc);
break;
}
if (ifp->if_flags & IFF_UP) {
if (ifp->if_drv_flags & IFF_DRV_RUNNING) {
/*
* Caller meight hold mutex, e.g.
* bpf; use busy-wait for the RNDIS
* reply.
*/
HN_NO_SLEEPING(sc);
hn_set_rxfilter(sc);
HN_SLEEPING_OK(sc);
} else {
hn_init_locked(sc);
}
} else {
if (ifp->if_drv_flags & IFF_DRV_RUNNING)
hn_stop(sc);
}
sc->hn_if_flags = ifp->if_flags;
HN_UNLOCK(sc);
break;
case SIOCSIFCAP:
HN_LOCK(sc);
mask = ifr->ifr_reqcap ^ ifp->if_capenable;
if (mask & IFCAP_TXCSUM) {
ifp->if_capenable ^= IFCAP_TXCSUM;
if (ifp->if_capenable & IFCAP_TXCSUM)
ifp->if_hwassist |= HN_CSUM_IP_HWASSIST(sc);
else
ifp->if_hwassist &= ~HN_CSUM_IP_HWASSIST(sc);
}
if (mask & IFCAP_TXCSUM_IPV6) {
ifp->if_capenable ^= IFCAP_TXCSUM_IPV6;
if (ifp->if_capenable & IFCAP_TXCSUM_IPV6)
ifp->if_hwassist |= HN_CSUM_IP6_HWASSIST(sc);
else
ifp->if_hwassist &= ~HN_CSUM_IP6_HWASSIST(sc);
}
/* TODO: flip RNDIS offload parameters for RXCSUM. */
if (mask & IFCAP_RXCSUM)
ifp->if_capenable ^= IFCAP_RXCSUM;
#ifdef foo
/* We can't diff IPv6 packets from IPv4 packets on RX path. */
if (mask & IFCAP_RXCSUM_IPV6)
ifp->if_capenable ^= IFCAP_RXCSUM_IPV6;
#endif
if (mask & IFCAP_LRO)
ifp->if_capenable ^= IFCAP_LRO;
if (mask & IFCAP_TSO4) {
ifp->if_capenable ^= IFCAP_TSO4;
if (ifp->if_capenable & IFCAP_TSO4)
ifp->if_hwassist |= CSUM_IP_TSO;
else
ifp->if_hwassist &= ~CSUM_IP_TSO;
}
if (mask & IFCAP_TSO6) {
ifp->if_capenable ^= IFCAP_TSO6;
if (ifp->if_capenable & IFCAP_TSO6)
ifp->if_hwassist |= CSUM_IP6_TSO;
else
ifp->if_hwassist &= ~CSUM_IP6_TSO;
}
HN_UNLOCK(sc);
break;
case SIOCADDMULTI:
case SIOCDELMULTI:
HN_LOCK(sc);
if ((sc->hn_flags & HN_FLAG_SYNTH_ATTACHED) == 0) {
HN_UNLOCK(sc);
break;
}
if (ifp->if_drv_flags & IFF_DRV_RUNNING) {
/*
* Multicast uses mutex; use busy-wait for
* the RNDIS reply.
*/
HN_NO_SLEEPING(sc);
hn_set_rxfilter(sc);
HN_SLEEPING_OK(sc);
}
HN_UNLOCK(sc);
break;
case SIOCSIFMEDIA:
case SIOCGIFMEDIA:
error = ifmedia_ioctl(ifp, ifr, &sc->hn_media, cmd);
break;
default:
error = ether_ioctl(ifp, cmd, data);
break;
}
return (error);
}
static void
hn_stop(struct hn_softc *sc)
{
struct ifnet *ifp = sc->hn_ifp;
int i;
HN_LOCK_ASSERT(sc);
KASSERT(sc->hn_flags & HN_FLAG_SYNTH_ATTACHED,
("synthetic parts were not attached"));
/* Clear RUNNING bit _before_ hn_suspend_data() */
atomic_clear_int(&ifp->if_drv_flags, IFF_DRV_RUNNING);
hn_suspend_data(sc);
/* Clear OACTIVE bit. */
atomic_clear_int(&ifp->if_drv_flags, IFF_DRV_OACTIVE);
for (i = 0; i < sc->hn_tx_ring_inuse; ++i)
sc->hn_tx_ring[i].hn_oactive = 0;
}
static void
hn_init_locked(struct hn_softc *sc)
{
struct ifnet *ifp = sc->hn_ifp;
int i;
HN_LOCK_ASSERT(sc);
if ((sc->hn_flags & HN_FLAG_SYNTH_ATTACHED) == 0)
return;
if (ifp->if_drv_flags & IFF_DRV_RUNNING)
return;
/* Configure RX filter */
hn_set_rxfilter(sc);
/* Clear OACTIVE bit. */
atomic_clear_int(&ifp->if_drv_flags, IFF_DRV_OACTIVE);
for (i = 0; i < sc->hn_tx_ring_inuse; ++i)
sc->hn_tx_ring[i].hn_oactive = 0;
/* Clear TX 'suspended' bit. */
hn_resume_tx(sc, sc->hn_tx_ring_inuse);
/* Everything is ready; unleash! */
atomic_set_int(&ifp->if_drv_flags, IFF_DRV_RUNNING);
}
static void
hn_init(void *xsc)
{
struct hn_softc *sc = xsc;
HN_LOCK(sc);
hn_init_locked(sc);
HN_UNLOCK(sc);
}
#if __FreeBSD_version >= 1100099
static int
hn_lro_lenlim_sysctl(SYSCTL_HANDLER_ARGS)
{
struct hn_softc *sc = arg1;
unsigned int lenlim;
int error;
lenlim = sc->hn_rx_ring[0].hn_lro.lro_length_lim;
error = sysctl_handle_int(oidp, &lenlim, 0, req);
if (error || req->newptr == NULL)
return error;
HN_LOCK(sc);
if (lenlim < HN_LRO_LENLIM_MIN(sc->hn_ifp) ||
lenlim > TCP_LRO_LENGTH_MAX) {
HN_UNLOCK(sc);
return EINVAL;
}
hn_set_lro_lenlim(sc, lenlim);
HN_UNLOCK(sc);
return 0;
}
static int
hn_lro_ackcnt_sysctl(SYSCTL_HANDLER_ARGS)
{
struct hn_softc *sc = arg1;
int ackcnt, error, i;
/*
* lro_ackcnt_lim is append count limit,
* +1 to turn it into aggregation limit.
*/
ackcnt = sc->hn_rx_ring[0].hn_lro.lro_ackcnt_lim + 1;
error = sysctl_handle_int(oidp, &ackcnt, 0, req);
if (error || req->newptr == NULL)
return error;
if (ackcnt < 2 || ackcnt > (TCP_LRO_ACKCNT_MAX + 1))
return EINVAL;
/*
* Convert aggregation limit back to append
* count limit.
*/
--ackcnt;
HN_LOCK(sc);
for (i = 0; i < sc->hn_rx_ring_cnt; ++i)
sc->hn_rx_ring[i].hn_lro.lro_ackcnt_lim = ackcnt;
HN_UNLOCK(sc);
return 0;
}
#endif
static int
hn_trust_hcsum_sysctl(SYSCTL_HANDLER_ARGS)
{
struct hn_softc *sc = arg1;
int hcsum = arg2;
int on, error, i;
on = 0;
if (sc->hn_rx_ring[0].hn_trust_hcsum & hcsum)
on = 1;
error = sysctl_handle_int(oidp, &on, 0, req);
if (error || req->newptr == NULL)
return error;
HN_LOCK(sc);
for (i = 0; i < sc->hn_rx_ring_cnt; ++i) {
struct hn_rx_ring *rxr = &sc->hn_rx_ring[i];
if (on)
rxr->hn_trust_hcsum |= hcsum;
else
rxr->hn_trust_hcsum &= ~hcsum;
}
HN_UNLOCK(sc);
return 0;
}
static int
hn_chim_size_sysctl(SYSCTL_HANDLER_ARGS)
{
struct hn_softc *sc = arg1;
int chim_size, error;
chim_size = sc->hn_tx_ring[0].hn_chim_size;
error = sysctl_handle_int(oidp, &chim_size, 0, req);
if (error || req->newptr == NULL)
return error;
if (chim_size > sc->hn_chim_szmax || chim_size <= 0)
return EINVAL;
HN_LOCK(sc);
hn_set_chim_size(sc, chim_size);
HN_UNLOCK(sc);
return 0;
}
#if __FreeBSD_version < 1100095
static int
hn_rx_stat_int_sysctl(SYSCTL_HANDLER_ARGS)
{
struct hn_softc *sc = arg1;
int ofs = arg2, i, error;
struct hn_rx_ring *rxr;
uint64_t stat;
stat = 0;
for (i = 0; i < sc->hn_rx_ring_cnt; ++i) {
rxr = &sc->hn_rx_ring[i];
stat += *((int *)((uint8_t *)rxr + ofs));
}
error = sysctl_handle_64(oidp, &stat, 0, req);
if (error || req->newptr == NULL)
return error;
/* Zero out this stat. */
for (i = 0; i < sc->hn_rx_ring_cnt; ++i) {
rxr = &sc->hn_rx_ring[i];
*((int *)((uint8_t *)rxr + ofs)) = 0;
}
return 0;
}
#else
static int
hn_rx_stat_u64_sysctl(SYSCTL_HANDLER_ARGS)
{
struct hn_softc *sc = arg1;
int ofs = arg2, i, error;
struct hn_rx_ring *rxr;
uint64_t stat;
stat = 0;
for (i = 0; i < sc->hn_rx_ring_cnt; ++i) {
rxr = &sc->hn_rx_ring[i];
stat += *((uint64_t *)((uint8_t *)rxr + ofs));
}
error = sysctl_handle_64(oidp, &stat, 0, req);
if (error || req->newptr == NULL)
return error;
/* Zero out this stat. */
for (i = 0; i < sc->hn_rx_ring_cnt; ++i) {
rxr = &sc->hn_rx_ring[i];
*((uint64_t *)((uint8_t *)rxr + ofs)) = 0;
}
return 0;
}
#endif
static int
hn_rx_stat_ulong_sysctl(SYSCTL_HANDLER_ARGS)
{
struct hn_softc *sc = arg1;
int ofs = arg2, i, error;
struct hn_rx_ring *rxr;
u_long stat;
stat = 0;
for (i = 0; i < sc->hn_rx_ring_cnt; ++i) {
rxr = &sc->hn_rx_ring[i];
stat += *((u_long *)((uint8_t *)rxr + ofs));
}
error = sysctl_handle_long(oidp, &stat, 0, req);
if (error || req->newptr == NULL)
return error;
/* Zero out this stat. */
for (i = 0; i < sc->hn_rx_ring_cnt; ++i) {
rxr = &sc->hn_rx_ring[i];
*((u_long *)((uint8_t *)rxr + ofs)) = 0;
}
return 0;
}
static int
hn_tx_stat_ulong_sysctl(SYSCTL_HANDLER_ARGS)
{
struct hn_softc *sc = arg1;
int ofs = arg2, i, error;
struct hn_tx_ring *txr;
u_long stat;
stat = 0;
for (i = 0; i < sc->hn_tx_ring_cnt; ++i) {
txr = &sc->hn_tx_ring[i];
stat += *((u_long *)((uint8_t *)txr + ofs));
}
error = sysctl_handle_long(oidp, &stat, 0, req);
if (error || req->newptr == NULL)
return error;
/* Zero out this stat. */
for (i = 0; i < sc->hn_tx_ring_cnt; ++i) {
txr = &sc->hn_tx_ring[i];
*((u_long *)((uint8_t *)txr + ofs)) = 0;
}
return 0;
}
static int
hn_tx_conf_int_sysctl(SYSCTL_HANDLER_ARGS)
{
struct hn_softc *sc = arg1;
int ofs = arg2, i, error, conf;
struct hn_tx_ring *txr;
txr = &sc->hn_tx_ring[0];
conf = *((int *)((uint8_t *)txr + ofs));
error = sysctl_handle_int(oidp, &conf, 0, req);
if (error || req->newptr == NULL)
return error;
HN_LOCK(sc);
for (i = 0; i < sc->hn_tx_ring_cnt; ++i) {
txr = &sc->hn_tx_ring[i];
*((int *)((uint8_t *)txr + ofs)) = conf;
}
HN_UNLOCK(sc);
return 0;
}
static int
hn_txagg_size_sysctl(SYSCTL_HANDLER_ARGS)
{
struct hn_softc *sc = arg1;
int error, size;
size = sc->hn_agg_size;
error = sysctl_handle_int(oidp, &size, 0, req);
if (error || req->newptr == NULL)
return (error);
HN_LOCK(sc);
sc->hn_agg_size = size;
hn_set_txagg(sc);
HN_UNLOCK(sc);
return (0);
}
static int
hn_txagg_pkts_sysctl(SYSCTL_HANDLER_ARGS)
{
struct hn_softc *sc = arg1;
int error, pkts;
pkts = sc->hn_agg_pkts;
error = sysctl_handle_int(oidp, &pkts, 0, req);
if (error || req->newptr == NULL)
return (error);
HN_LOCK(sc);
sc->hn_agg_pkts = pkts;
hn_set_txagg(sc);
HN_UNLOCK(sc);
return (0);
}
static int
hn_txagg_pktmax_sysctl(SYSCTL_HANDLER_ARGS)
{
struct hn_softc *sc = arg1;
int pkts;
pkts = sc->hn_tx_ring[0].hn_agg_pktmax;
return (sysctl_handle_int(oidp, &pkts, 0, req));
}
static int
hn_txagg_align_sysctl(SYSCTL_HANDLER_ARGS)
{
struct hn_softc *sc = arg1;
int align;
align = sc->hn_tx_ring[0].hn_agg_align;
return (sysctl_handle_int(oidp, &align, 0, req));
}
static int
hn_ndis_version_sysctl(SYSCTL_HANDLER_ARGS)
{
struct hn_softc *sc = arg1;
char verstr[16];
snprintf(verstr, sizeof(verstr), "%u.%u",
HN_NDIS_VERSION_MAJOR(sc->hn_ndis_ver),
HN_NDIS_VERSION_MINOR(sc->hn_ndis_ver));
return sysctl_handle_string(oidp, verstr, sizeof(verstr), req);
}
static int
hn_caps_sysctl(SYSCTL_HANDLER_ARGS)
{
struct hn_softc *sc = arg1;
char caps_str[128];
uint32_t caps;
HN_LOCK(sc);
caps = sc->hn_caps;
HN_UNLOCK(sc);
snprintf(caps_str, sizeof(caps_str), "%b", caps, HN_CAP_BITS);
return sysctl_handle_string(oidp, caps_str, sizeof(caps_str), req);
}
static int
hn_hwassist_sysctl(SYSCTL_HANDLER_ARGS)
{
struct hn_softc *sc = arg1;
char assist_str[128];
uint32_t hwassist;
HN_LOCK(sc);
hwassist = sc->hn_ifp->if_hwassist;
HN_UNLOCK(sc);
snprintf(assist_str, sizeof(assist_str), "%b", hwassist, CSUM_BITS);
return sysctl_handle_string(oidp, assist_str, sizeof(assist_str), req);
}
static int
hn_rxfilter_sysctl(SYSCTL_HANDLER_ARGS)
{
struct hn_softc *sc = arg1;
char filter_str[128];
uint32_t filter;
HN_LOCK(sc);
filter = sc->hn_rx_filter;
HN_UNLOCK(sc);
snprintf(filter_str, sizeof(filter_str), "%b", filter,
NDIS_PACKET_TYPES);
return sysctl_handle_string(oidp, filter_str, sizeof(filter_str), req);
}
static int
hn_rss_key_sysctl(SYSCTL_HANDLER_ARGS)
{
struct hn_softc *sc = arg1;
int error;
HN_LOCK(sc);
error = SYSCTL_OUT(req, sc->hn_rss.rss_key, sizeof(sc->hn_rss.rss_key));
if (error || req->newptr == NULL)
goto back;
error = SYSCTL_IN(req, sc->hn_rss.rss_key, sizeof(sc->hn_rss.rss_key));
if (error)
goto back;
sc->hn_flags |= HN_FLAG_HAS_RSSKEY;
if (sc->hn_rx_ring_inuse > 1) {
error = hn_rss_reconfig(sc);
} else {
/* Not RSS capable, at least for now; just save the RSS key. */
error = 0;
}
back:
HN_UNLOCK(sc);
return (error);
}
static int
hn_rss_ind_sysctl(SYSCTL_HANDLER_ARGS)
{
struct hn_softc *sc = arg1;
int error;
HN_LOCK(sc);
error = SYSCTL_OUT(req, sc->hn_rss.rss_ind, sizeof(sc->hn_rss.rss_ind));
if (error || req->newptr == NULL)
goto back;
/*
* Don't allow RSS indirect table change, if this interface is not
* RSS capable currently.
*/
if (sc->hn_rx_ring_inuse == 1) {
error = EOPNOTSUPP;
goto back;
}
error = SYSCTL_IN(req, sc->hn_rss.rss_ind, sizeof(sc->hn_rss.rss_ind));
if (error)
goto back;
sc->hn_flags |= HN_FLAG_HAS_RSSIND;
hn_rss_ind_fixup(sc, sc->hn_rx_ring_inuse);
error = hn_rss_reconfig(sc);
back:
HN_UNLOCK(sc);
return (error);
}
static int
hn_rss_hash_sysctl(SYSCTL_HANDLER_ARGS)
{
struct hn_softc *sc = arg1;
char hash_str[128];
uint32_t hash;
HN_LOCK(sc);
hash = sc->hn_rss_hash;
HN_UNLOCK(sc);
snprintf(hash_str, sizeof(hash_str), "%b", hash, NDIS_HASH_BITS);
return sysctl_handle_string(oidp, hash_str, sizeof(hash_str), req);
}
static int
hn_check_iplen(const struct mbuf *m, int hoff)
{
const struct ip *ip;
int len, iphlen, iplen;
const struct tcphdr *th;
int thoff; /* TCP data offset */
len = hoff + sizeof(struct ip);
/* The packet must be at least the size of an IP header. */
if (m->m_pkthdr.len < len)
return IPPROTO_DONE;
/* The fixed IP header must reside completely in the first mbuf. */
if (m->m_len < len)
return IPPROTO_DONE;
ip = mtodo(m, hoff);
/* Bound check the packet's stated IP header length. */
iphlen = ip->ip_hl << 2;
if (iphlen < sizeof(struct ip)) /* minimum header length */
return IPPROTO_DONE;
/* The full IP header must reside completely in the one mbuf. */
if (m->m_len < hoff + iphlen)
return IPPROTO_DONE;
iplen = ntohs(ip->ip_len);
/*
* Check that the amount of data in the buffers is as
* at least much as the IP header would have us expect.
*/
if (m->m_pkthdr.len < hoff + iplen)
return IPPROTO_DONE;
/*
* Ignore IP fragments.
*/
if (ntohs(ip->ip_off) & (IP_OFFMASK | IP_MF))
return IPPROTO_DONE;
/*
* The TCP/IP or UDP/IP header must be entirely contained within
* the first fragment of a packet.
*/
switch (ip->ip_p) {
case IPPROTO_TCP:
if (iplen < iphlen + sizeof(struct tcphdr))
return IPPROTO_DONE;
if (m->m_len < hoff + iphlen + sizeof(struct tcphdr))
return IPPROTO_DONE;
th = (const struct tcphdr *)((const uint8_t *)ip + iphlen);
thoff = th->th_off << 2;
if (thoff < sizeof(struct tcphdr) || thoff + iphlen > iplen)
return IPPROTO_DONE;
if (m->m_len < hoff + iphlen + thoff)
return IPPROTO_DONE;
break;
case IPPROTO_UDP:
if (iplen < iphlen + sizeof(struct udphdr))
return IPPROTO_DONE;
if (m->m_len < hoff + iphlen + sizeof(struct udphdr))
return IPPROTO_DONE;
break;
default:
if (iplen < iphlen)
return IPPROTO_DONE;
break;
}
return ip->ip_p;
}
static int
hn_create_rx_data(struct hn_softc *sc, int ring_cnt)
{
struct sysctl_oid_list *child;
struct sysctl_ctx_list *ctx;
device_t dev = sc->hn_dev;
#if defined(INET) || defined(INET6)
#if __FreeBSD_version >= 1100095
int lroent_cnt;
#endif
#endif
int i;
/*
* Create RXBUF for reception.
*
* NOTE:
* - It is shared by all channels.
* - A large enough buffer is allocated, certain version of NVSes
* may further limit the usable space.
*/
sc->hn_rxbuf = hyperv_dmamem_alloc(bus_get_dma_tag(dev),
PAGE_SIZE, 0, HN_RXBUF_SIZE, &sc->hn_rxbuf_dma,
BUS_DMA_WAITOK | BUS_DMA_ZERO);
if (sc->hn_rxbuf == NULL) {
device_printf(sc->hn_dev, "allocate rxbuf failed\n");
return (ENOMEM);
}
sc->hn_rx_ring_cnt = ring_cnt;
sc->hn_rx_ring_inuse = sc->hn_rx_ring_cnt;
sc->hn_rx_ring = malloc(sizeof(struct hn_rx_ring) * sc->hn_rx_ring_cnt,
M_DEVBUF, M_WAITOK | M_ZERO);
#if defined(INET) || defined(INET6)
#if __FreeBSD_version >= 1100095
lroent_cnt = hn_lro_entry_count;
if (lroent_cnt < TCP_LRO_ENTRIES)
lroent_cnt = TCP_LRO_ENTRIES;
if (bootverbose)
device_printf(dev, "LRO: entry count %d\n", lroent_cnt);
#endif
#endif /* INET || INET6 */
ctx = device_get_sysctl_ctx(dev);
child = SYSCTL_CHILDREN(device_get_sysctl_tree(dev));
/* Create dev.hn.UNIT.rx sysctl tree */
sc->hn_rx_sysctl_tree = SYSCTL_ADD_NODE(ctx, child, OID_AUTO, "rx",
CTLFLAG_RD | CTLFLAG_MPSAFE, 0, "");
for (i = 0; i < sc->hn_rx_ring_cnt; ++i) {
struct hn_rx_ring *rxr = &sc->hn_rx_ring[i];
rxr->hn_br = hyperv_dmamem_alloc(bus_get_dma_tag(dev),
PAGE_SIZE, 0, HN_TXBR_SIZE + HN_RXBR_SIZE,
&rxr->hn_br_dma, BUS_DMA_WAITOK);
if (rxr->hn_br == NULL) {
device_printf(dev, "allocate bufring failed\n");
return (ENOMEM);
}
if (hn_trust_hosttcp)
rxr->hn_trust_hcsum |= HN_TRUST_HCSUM_TCP;
if (hn_trust_hostudp)
rxr->hn_trust_hcsum |= HN_TRUST_HCSUM_UDP;
if (hn_trust_hostip)
rxr->hn_trust_hcsum |= HN_TRUST_HCSUM_IP;
rxr->hn_ifp = sc->hn_ifp;
if (i < sc->hn_tx_ring_cnt)
rxr->hn_txr = &sc->hn_tx_ring[i];
rxr->hn_pktbuf_len = HN_PKTBUF_LEN_DEF;
rxr->hn_pktbuf = malloc(rxr->hn_pktbuf_len, M_DEVBUF, M_WAITOK);
rxr->hn_rx_idx = i;
rxr->hn_rxbuf = sc->hn_rxbuf;
/*
* Initialize LRO.
*/
#if defined(INET) || defined(INET6)
#if __FreeBSD_version >= 1100095
tcp_lro_init_args(&rxr->hn_lro, sc->hn_ifp, lroent_cnt,
hn_lro_mbufq_depth);
#else
tcp_lro_init(&rxr->hn_lro);
rxr->hn_lro.ifp = sc->hn_ifp;
#endif
#if __FreeBSD_version >= 1100099
rxr->hn_lro.lro_length_lim = HN_LRO_LENLIM_DEF;
rxr->hn_lro.lro_ackcnt_lim = HN_LRO_ACKCNT_DEF;
#endif
#endif /* INET || INET6 */
if (sc->hn_rx_sysctl_tree != NULL) {
char name[16];
/*
* Create per RX ring sysctl tree:
* dev.hn.UNIT.rx.RINGID
*/
snprintf(name, sizeof(name), "%d", i);
rxr->hn_rx_sysctl_tree = SYSCTL_ADD_NODE(ctx,
SYSCTL_CHILDREN(sc->hn_rx_sysctl_tree),
OID_AUTO, name, CTLFLAG_RD | CTLFLAG_MPSAFE, 0, "");
if (rxr->hn_rx_sysctl_tree != NULL) {
SYSCTL_ADD_ULONG(ctx,
SYSCTL_CHILDREN(rxr->hn_rx_sysctl_tree),
OID_AUTO, "packets", CTLFLAG_RW,
&rxr->hn_pkts, "# of packets received");
SYSCTL_ADD_ULONG(ctx,
SYSCTL_CHILDREN(rxr->hn_rx_sysctl_tree),
OID_AUTO, "rss_pkts", CTLFLAG_RW,
&rxr->hn_rss_pkts,
"# of packets w/ RSS info received");
SYSCTL_ADD_INT(ctx,
SYSCTL_CHILDREN(rxr->hn_rx_sysctl_tree),
OID_AUTO, "pktbuf_len", CTLFLAG_RD,
&rxr->hn_pktbuf_len, 0,
"Temporary channel packet buffer length");
}
}
}
SYSCTL_ADD_PROC(ctx, child, OID_AUTO, "lro_queued",
CTLTYPE_U64 | CTLFLAG_RW | CTLFLAG_MPSAFE, sc,
__offsetof(struct hn_rx_ring, hn_lro.lro_queued),
#if __FreeBSD_version < 1100095
hn_rx_stat_int_sysctl,
#else
hn_rx_stat_u64_sysctl,
#endif
"LU", "LRO queued");
SYSCTL_ADD_PROC(ctx, child, OID_AUTO, "lro_flushed",
CTLTYPE_U64 | CTLFLAG_RW | CTLFLAG_MPSAFE, sc,
__offsetof(struct hn_rx_ring, hn_lro.lro_flushed),
#if __FreeBSD_version < 1100095
hn_rx_stat_int_sysctl,
#else
hn_rx_stat_u64_sysctl,
#endif
"LU", "LRO flushed");
SYSCTL_ADD_PROC(ctx, child, OID_AUTO, "lro_tried",
CTLTYPE_ULONG | CTLFLAG_RW | CTLFLAG_MPSAFE, sc,
__offsetof(struct hn_rx_ring, hn_lro_tried),
hn_rx_stat_ulong_sysctl, "LU", "# of LRO tries");
#if __FreeBSD_version >= 1100099
SYSCTL_ADD_PROC(ctx, child, OID_AUTO, "lro_length_lim",
CTLTYPE_UINT | CTLFLAG_RW | CTLFLAG_MPSAFE, sc, 0,
hn_lro_lenlim_sysctl, "IU",
"Max # of data bytes to be aggregated by LRO");
SYSCTL_ADD_PROC(ctx, child, OID_AUTO, "lro_ackcnt_lim",
CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_MPSAFE, sc, 0,
hn_lro_ackcnt_sysctl, "I",
"Max # of ACKs to be aggregated by LRO");
#endif
SYSCTL_ADD_PROC(ctx, child, OID_AUTO, "trust_hosttcp",
CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_MPSAFE, sc, HN_TRUST_HCSUM_TCP,
hn_trust_hcsum_sysctl, "I",
"Trust tcp segement verification on host side, "
"when csum info is missing");
SYSCTL_ADD_PROC(ctx, child, OID_AUTO, "trust_hostudp",
CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_MPSAFE, sc, HN_TRUST_HCSUM_UDP,
hn_trust_hcsum_sysctl, "I",
"Trust udp datagram verification on host side, "
"when csum info is missing");
SYSCTL_ADD_PROC(ctx, child, OID_AUTO, "trust_hostip",
CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_MPSAFE, sc, HN_TRUST_HCSUM_IP,
hn_trust_hcsum_sysctl, "I",
"Trust ip packet verification on host side, "
"when csum info is missing");
SYSCTL_ADD_PROC(ctx, child, OID_AUTO, "csum_ip",
CTLTYPE_ULONG | CTLFLAG_RW | CTLFLAG_MPSAFE, sc,
__offsetof(struct hn_rx_ring, hn_csum_ip),
hn_rx_stat_ulong_sysctl, "LU", "RXCSUM IP");
SYSCTL_ADD_PROC(ctx, child, OID_AUTO, "csum_tcp",
CTLTYPE_ULONG | CTLFLAG_RW | CTLFLAG_MPSAFE, sc,
__offsetof(struct hn_rx_ring, hn_csum_tcp),
hn_rx_stat_ulong_sysctl, "LU", "RXCSUM TCP");
SYSCTL_ADD_PROC(ctx, child, OID_AUTO, "csum_udp",
CTLTYPE_ULONG | CTLFLAG_RW | CTLFLAG_MPSAFE, sc,
__offsetof(struct hn_rx_ring, hn_csum_udp),
hn_rx_stat_ulong_sysctl, "LU", "RXCSUM UDP");
SYSCTL_ADD_PROC(ctx, child, OID_AUTO, "csum_trusted",
CTLTYPE_ULONG | CTLFLAG_RW | CTLFLAG_MPSAFE, sc,
__offsetof(struct hn_rx_ring, hn_csum_trusted),
hn_rx_stat_ulong_sysctl, "LU",
"# of packets that we trust host's csum verification");
SYSCTL_ADD_PROC(ctx, child, OID_AUTO, "small_pkts",
CTLTYPE_ULONG | CTLFLAG_RW | CTLFLAG_MPSAFE, sc,
__offsetof(struct hn_rx_ring, hn_small_pkts),
hn_rx_stat_ulong_sysctl, "LU", "# of small packets received");
SYSCTL_ADD_PROC(ctx, child, OID_AUTO, "rx_ack_failed",
CTLTYPE_ULONG | CTLFLAG_RW | CTLFLAG_MPSAFE, sc,
__offsetof(struct hn_rx_ring, hn_ack_failed),
hn_rx_stat_ulong_sysctl, "LU", "# of RXBUF ack failures");
SYSCTL_ADD_INT(ctx, child, OID_AUTO, "rx_ring_cnt",
CTLFLAG_RD, &sc->hn_rx_ring_cnt, 0, "# created RX rings");
SYSCTL_ADD_INT(ctx, child, OID_AUTO, "rx_ring_inuse",
CTLFLAG_RD, &sc->hn_rx_ring_inuse, 0, "# used RX rings");
return (0);
}
static void
hn_destroy_rx_data(struct hn_softc *sc)
{
int i;
if (sc->hn_rxbuf != NULL) {
hyperv_dmamem_free(&sc->hn_rxbuf_dma, sc->hn_rxbuf);
sc->hn_rxbuf = NULL;
}
if (sc->hn_rx_ring_cnt == 0)
return;
for (i = 0; i < sc->hn_rx_ring_cnt; ++i) {
struct hn_rx_ring *rxr = &sc->hn_rx_ring[i];
if (rxr->hn_br == NULL)
continue;
hyperv_dmamem_free(&rxr->hn_br_dma, rxr->hn_br);
rxr->hn_br = NULL;
#if defined(INET) || defined(INET6)
tcp_lro_free(&rxr->hn_lro);
#endif
free(rxr->hn_pktbuf, M_DEVBUF);
}
free(sc->hn_rx_ring, M_DEVBUF);
sc->hn_rx_ring = NULL;
sc->hn_rx_ring_cnt = 0;
sc->hn_rx_ring_inuse = 0;
}
static int
hn_tx_ring_create(struct hn_softc *sc, int id)
{
struct hn_tx_ring *txr = &sc->hn_tx_ring[id];
device_t dev = sc->hn_dev;
bus_dma_tag_t parent_dtag;
int error, i;
txr->hn_sc = sc;
txr->hn_tx_idx = id;
#ifndef HN_USE_TXDESC_BUFRING
mtx_init(&txr->hn_txlist_spin, "hn txlist", NULL, MTX_SPIN);
#endif
mtx_init(&txr->hn_tx_lock, "hn tx", NULL, MTX_DEF);
txr->hn_txdesc_cnt = HN_TX_DESC_CNT;
txr->hn_txdesc = malloc(sizeof(struct hn_txdesc) * txr->hn_txdesc_cnt,
M_DEVBUF, M_WAITOK | M_ZERO);
#ifndef HN_USE_TXDESC_BUFRING
SLIST_INIT(&txr->hn_txlist);
#else
txr->hn_txdesc_br = buf_ring_alloc(txr->hn_txdesc_cnt, M_DEVBUF,
M_WAITOK, &txr->hn_tx_lock);
#endif
txr->hn_tx_taskq = sc->hn_tx_taskq;
#ifdef HN_IFSTART_SUPPORT
if (hn_use_if_start) {
txr->hn_txeof = hn_start_txeof;
TASK_INIT(&txr->hn_tx_task, 0, hn_start_taskfunc, txr);
TASK_INIT(&txr->hn_txeof_task, 0, hn_start_txeof_taskfunc, txr);
} else
#endif
{
int br_depth;
txr->hn_txeof = hn_xmit_txeof;
TASK_INIT(&txr->hn_tx_task, 0, hn_xmit_taskfunc, txr);
TASK_INIT(&txr->hn_txeof_task, 0, hn_xmit_txeof_taskfunc, txr);
br_depth = hn_get_txswq_depth(txr);
txr->hn_mbuf_br = buf_ring_alloc(br_depth, M_DEVBUF,
M_WAITOK, &txr->hn_tx_lock);
}
txr->hn_direct_tx_size = hn_direct_tx_size;
/*
* Always schedule transmission instead of trying to do direct
* transmission. This one gives the best performance so far.
*/
txr->hn_sched_tx = 1;
parent_dtag = bus_get_dma_tag(dev);
/* DMA tag for RNDIS packet messages. */
error = bus_dma_tag_create(parent_dtag, /* parent */
HN_RNDIS_PKT_ALIGN, /* alignment */
HN_RNDIS_PKT_BOUNDARY, /* boundary */
BUS_SPACE_MAXADDR, /* lowaddr */
BUS_SPACE_MAXADDR, /* highaddr */
NULL, NULL, /* filter, filterarg */
HN_RNDIS_PKT_LEN, /* maxsize */
1, /* nsegments */
HN_RNDIS_PKT_LEN, /* maxsegsize */
0, /* flags */
NULL, /* lockfunc */
NULL, /* lockfuncarg */
&txr->hn_tx_rndis_dtag);
if (error) {
device_printf(dev, "failed to create rndis dmatag\n");
return error;
}
/* DMA tag for data. */
error = bus_dma_tag_create(parent_dtag, /* parent */
1, /* alignment */
HN_TX_DATA_BOUNDARY, /* boundary */
BUS_SPACE_MAXADDR, /* lowaddr */
BUS_SPACE_MAXADDR, /* highaddr */
NULL, NULL, /* filter, filterarg */
HN_TX_DATA_MAXSIZE, /* maxsize */
HN_TX_DATA_SEGCNT_MAX, /* nsegments */
HN_TX_DATA_SEGSIZE, /* maxsegsize */
0, /* flags */
NULL, /* lockfunc */
NULL, /* lockfuncarg */
&txr->hn_tx_data_dtag);
if (error) {
device_printf(dev, "failed to create data dmatag\n");
return error;
}
for (i = 0; i < txr->hn_txdesc_cnt; ++i) {
struct hn_txdesc *txd = &txr->hn_txdesc[i];
txd->txr = txr;
txd->chim_index = HN_NVS_CHIM_IDX_INVALID;
STAILQ_INIT(&txd->agg_list);
/*
* Allocate and load RNDIS packet message.
*/
error = bus_dmamem_alloc(txr->hn_tx_rndis_dtag,
(void **)&txd->rndis_pkt,
BUS_DMA_WAITOK | BUS_DMA_COHERENT | BUS_DMA_ZERO,
&txd->rndis_pkt_dmap);
if (error) {
device_printf(dev,
"failed to allocate rndis_packet_msg, %d\n", i);
return error;
}
error = bus_dmamap_load(txr->hn_tx_rndis_dtag,
txd->rndis_pkt_dmap,
txd->rndis_pkt, HN_RNDIS_PKT_LEN,
hyperv_dma_map_paddr, &txd->rndis_pkt_paddr,
BUS_DMA_NOWAIT);
if (error) {
device_printf(dev,
"failed to load rndis_packet_msg, %d\n", i);
bus_dmamem_free(txr->hn_tx_rndis_dtag,
txd->rndis_pkt, txd->rndis_pkt_dmap);
return error;
}
/* DMA map for TX data. */
error = bus_dmamap_create(txr->hn_tx_data_dtag, 0,
&txd->data_dmap);
if (error) {
device_printf(dev,
"failed to allocate tx data dmamap\n");
bus_dmamap_unload(txr->hn_tx_rndis_dtag,
txd->rndis_pkt_dmap);
bus_dmamem_free(txr->hn_tx_rndis_dtag,
txd->rndis_pkt, txd->rndis_pkt_dmap);
return error;
}
/* All set, put it to list */
txd->flags |= HN_TXD_FLAG_ONLIST;
#ifndef HN_USE_TXDESC_BUFRING
SLIST_INSERT_HEAD(&txr->hn_txlist, txd, link);
#else
buf_ring_enqueue(txr->hn_txdesc_br, txd);
#endif
}
txr->hn_txdesc_avail = txr->hn_txdesc_cnt;
if (sc->hn_tx_sysctl_tree != NULL) {
struct sysctl_oid_list *child;
struct sysctl_ctx_list *ctx;
char name[16];
/*
* Create per TX ring sysctl tree:
* dev.hn.UNIT.tx.RINGID
*/
ctx = device_get_sysctl_ctx(dev);
child = SYSCTL_CHILDREN(sc->hn_tx_sysctl_tree);
snprintf(name, sizeof(name), "%d", id);
txr->hn_tx_sysctl_tree = SYSCTL_ADD_NODE(ctx, child, OID_AUTO,
name, CTLFLAG_RD | CTLFLAG_MPSAFE, 0, "");
if (txr->hn_tx_sysctl_tree != NULL) {
child = SYSCTL_CHILDREN(txr->hn_tx_sysctl_tree);
SYSCTL_ADD_INT(ctx, child, OID_AUTO, "txdesc_avail",
CTLFLAG_RD, &txr->hn_txdesc_avail, 0,
"# of available TX descs");
#ifdef HN_IFSTART_SUPPORT
if (!hn_use_if_start)
#endif
{
SYSCTL_ADD_INT(ctx, child, OID_AUTO, "oactive",
CTLFLAG_RD, &txr->hn_oactive, 0,
"over active");
}
SYSCTL_ADD_ULONG(ctx, child, OID_AUTO, "packets",
CTLFLAG_RW, &txr->hn_pkts,
"# of packets transmitted");
SYSCTL_ADD_ULONG(ctx, child, OID_AUTO, "sends",
CTLFLAG_RW, &txr->hn_sends, "# of sends");
}
}
return 0;
}
static void
hn_txdesc_dmamap_destroy(struct hn_txdesc *txd)
{
struct hn_tx_ring *txr = txd->txr;
KASSERT(txd->m == NULL, ("still has mbuf installed"));
KASSERT((txd->flags & HN_TXD_FLAG_DMAMAP) == 0, ("still dma mapped"));
bus_dmamap_unload(txr->hn_tx_rndis_dtag, txd->rndis_pkt_dmap);
bus_dmamem_free(txr->hn_tx_rndis_dtag, txd->rndis_pkt,
txd->rndis_pkt_dmap);
bus_dmamap_destroy(txr->hn_tx_data_dtag, txd->data_dmap);
}
static void
hn_txdesc_gc(struct hn_tx_ring *txr, struct hn_txdesc *txd)
{
KASSERT(txd->refs == 0 || txd->refs == 1,
("invalid txd refs %d", txd->refs));
/* Aggregated txds will be freed by their aggregating txd. */
if (txd->refs > 0 && (txd->flags & HN_TXD_FLAG_ONAGG) == 0) {
int freed;
freed = hn_txdesc_put(txr, txd);
KASSERT(freed, ("can't free txdesc"));
}
}
static void
hn_tx_ring_destroy(struct hn_tx_ring *txr)
{
int i;
if (txr->hn_txdesc == NULL)
return;
/*
* NOTE:
* Because the freeing of aggregated txds will be deferred
* to the aggregating txd, two passes are used here:
* - The first pass GCes any pending txds. This GC is necessary,
* since if the channels are revoked, hypervisor will not
* deliver send-done for all pending txds.
* - The second pass frees the busdma stuffs, i.e. after all txds
* were freed.
*/
for (i = 0; i < txr->hn_txdesc_cnt; ++i)
hn_txdesc_gc(txr, &txr->hn_txdesc[i]);
for (i = 0; i < txr->hn_txdesc_cnt; ++i)
hn_txdesc_dmamap_destroy(&txr->hn_txdesc[i]);
if (txr->hn_tx_data_dtag != NULL)
bus_dma_tag_destroy(txr->hn_tx_data_dtag);
if (txr->hn_tx_rndis_dtag != NULL)
bus_dma_tag_destroy(txr->hn_tx_rndis_dtag);
#ifdef HN_USE_TXDESC_BUFRING
buf_ring_free(txr->hn_txdesc_br, M_DEVBUF);
#endif
free(txr->hn_txdesc, M_DEVBUF);
txr->hn_txdesc = NULL;
if (txr->hn_mbuf_br != NULL)
buf_ring_free(txr->hn_mbuf_br, M_DEVBUF);
#ifndef HN_USE_TXDESC_BUFRING
mtx_destroy(&txr->hn_txlist_spin);
#endif
mtx_destroy(&txr->hn_tx_lock);
}
static int
hn_create_tx_data(struct hn_softc *sc, int ring_cnt)
{
struct sysctl_oid_list *child;
struct sysctl_ctx_list *ctx;
int i;
/*
* Create TXBUF for chimney sending.
*
* NOTE: It is shared by all channels.
*/
sc->hn_chim = hyperv_dmamem_alloc(bus_get_dma_tag(sc->hn_dev),
PAGE_SIZE, 0, HN_CHIM_SIZE, &sc->hn_chim_dma,
BUS_DMA_WAITOK | BUS_DMA_ZERO);
if (sc->hn_chim == NULL) {
device_printf(sc->hn_dev, "allocate txbuf failed\n");
return (ENOMEM);
}
sc->hn_tx_ring_cnt = ring_cnt;
sc->hn_tx_ring_inuse = sc->hn_tx_ring_cnt;
sc->hn_tx_ring = malloc(sizeof(struct hn_tx_ring) * sc->hn_tx_ring_cnt,
M_DEVBUF, M_WAITOK | M_ZERO);
ctx = device_get_sysctl_ctx(sc->hn_dev);
child = SYSCTL_CHILDREN(device_get_sysctl_tree(sc->hn_dev));
/* Create dev.hn.UNIT.tx sysctl tree */
sc->hn_tx_sysctl_tree = SYSCTL_ADD_NODE(ctx, child, OID_AUTO, "tx",
CTLFLAG_RD | CTLFLAG_MPSAFE, 0, "");
for (i = 0; i < sc->hn_tx_ring_cnt; ++i) {
int error;
error = hn_tx_ring_create(sc, i);
if (error)
return error;
}
SYSCTL_ADD_PROC(ctx, child, OID_AUTO, "no_txdescs",
CTLTYPE_ULONG | CTLFLAG_RW | CTLFLAG_MPSAFE, sc,
__offsetof(struct hn_tx_ring, hn_no_txdescs),
hn_tx_stat_ulong_sysctl, "LU", "# of times short of TX descs");
SYSCTL_ADD_PROC(ctx, child, OID_AUTO, "send_failed",
CTLTYPE_ULONG | CTLFLAG_RW | CTLFLAG_MPSAFE, sc,
__offsetof(struct hn_tx_ring, hn_send_failed),
hn_tx_stat_ulong_sysctl, "LU", "# of hyper-v sending failure");
SYSCTL_ADD_PROC(ctx, child, OID_AUTO, "txdma_failed",
CTLTYPE_ULONG | CTLFLAG_RW | CTLFLAG_MPSAFE, sc,
__offsetof(struct hn_tx_ring, hn_txdma_failed),
hn_tx_stat_ulong_sysctl, "LU", "# of TX DMA failure");
SYSCTL_ADD_PROC(ctx, child, OID_AUTO, "agg_flush_failed",
CTLTYPE_ULONG | CTLFLAG_RW | CTLFLAG_MPSAFE, sc,
__offsetof(struct hn_tx_ring, hn_flush_failed),
hn_tx_stat_ulong_sysctl, "LU",
"# of packet transmission aggregation flush failure");
SYSCTL_ADD_PROC(ctx, child, OID_AUTO, "tx_collapsed",
CTLTYPE_ULONG | CTLFLAG_RW | CTLFLAG_MPSAFE, sc,
__offsetof(struct hn_tx_ring, hn_tx_collapsed),
hn_tx_stat_ulong_sysctl, "LU", "# of TX mbuf collapsed");
SYSCTL_ADD_PROC(ctx, child, OID_AUTO, "tx_chimney",
CTLTYPE_ULONG | CTLFLAG_RW | CTLFLAG_MPSAFE, sc,
__offsetof(struct hn_tx_ring, hn_tx_chimney),
hn_tx_stat_ulong_sysctl, "LU", "# of chimney send");
SYSCTL_ADD_PROC(ctx, child, OID_AUTO, "tx_chimney_tried",
CTLTYPE_ULONG | CTLFLAG_RW | CTLFLAG_MPSAFE, sc,
__offsetof(struct hn_tx_ring, hn_tx_chimney_tried),
hn_tx_stat_ulong_sysctl, "LU", "# of chimney send tries");
SYSCTL_ADD_INT(ctx, child, OID_AUTO, "txdesc_cnt",
CTLFLAG_RD, &sc->hn_tx_ring[0].hn_txdesc_cnt, 0,
"# of total TX descs");
SYSCTL_ADD_INT(ctx, child, OID_AUTO, "tx_chimney_max",
CTLFLAG_RD, &sc->hn_chim_szmax, 0,
"Chimney send packet size upper boundary");
SYSCTL_ADD_PROC(ctx, child, OID_AUTO, "tx_chimney_size",
CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_MPSAFE, sc, 0,
hn_chim_size_sysctl, "I", "Chimney send packet size limit");
SYSCTL_ADD_PROC(ctx, child, OID_AUTO, "direct_tx_size",
CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_MPSAFE, sc,
__offsetof(struct hn_tx_ring, hn_direct_tx_size),
hn_tx_conf_int_sysctl, "I",
"Size of the packet for direct transmission");
SYSCTL_ADD_PROC(ctx, child, OID_AUTO, "sched_tx",
CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_MPSAFE, sc,
__offsetof(struct hn_tx_ring, hn_sched_tx),
hn_tx_conf_int_sysctl, "I",
"Always schedule transmission "
"instead of doing direct transmission");
SYSCTL_ADD_INT(ctx, child, OID_AUTO, "tx_ring_cnt",
CTLFLAG_RD, &sc->hn_tx_ring_cnt, 0, "# created TX rings");
SYSCTL_ADD_INT(ctx, child, OID_AUTO, "tx_ring_inuse",
CTLFLAG_RD, &sc->hn_tx_ring_inuse, 0, "# used TX rings");
SYSCTL_ADD_INT(ctx, child, OID_AUTO, "agg_szmax",
CTLFLAG_RD, &sc->hn_tx_ring[0].hn_agg_szmax, 0,
"Applied packet transmission aggregation size");
SYSCTL_ADD_PROC(ctx, child, OID_AUTO, "agg_pktmax",
CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_MPSAFE, sc, 0,
hn_txagg_pktmax_sysctl, "I",
"Applied packet transmission aggregation packets");
SYSCTL_ADD_PROC(ctx, child, OID_AUTO, "agg_align",
CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_MPSAFE, sc, 0,
hn_txagg_align_sysctl, "I",
"Applied packet transmission aggregation alignment");
return 0;
}
static void
hn_set_chim_size(struct hn_softc *sc, int chim_size)
{
int i;
for (i = 0; i < sc->hn_tx_ring_cnt; ++i)
sc->hn_tx_ring[i].hn_chim_size = chim_size;
}
static void
hn_set_tso_maxsize(struct hn_softc *sc, int tso_maxlen, int mtu)
{
struct ifnet *ifp = sc->hn_ifp;
int tso_minlen;
if ((ifp->if_capabilities & (IFCAP_TSO4 | IFCAP_TSO6)) == 0)
return;
KASSERT(sc->hn_ndis_tso_sgmin >= 2,
("invalid NDIS tso sgmin %d", sc->hn_ndis_tso_sgmin));
tso_minlen = sc->hn_ndis_tso_sgmin * mtu;
KASSERT(sc->hn_ndis_tso_szmax >= tso_minlen &&
sc->hn_ndis_tso_szmax <= IP_MAXPACKET,
("invalid NDIS tso szmax %d", sc->hn_ndis_tso_szmax));
if (tso_maxlen < tso_minlen)
tso_maxlen = tso_minlen;
else if (tso_maxlen > IP_MAXPACKET)
tso_maxlen = IP_MAXPACKET;
if (tso_maxlen > sc->hn_ndis_tso_szmax)
tso_maxlen = sc->hn_ndis_tso_szmax;
ifp->if_hw_tsomax = tso_maxlen - (ETHER_HDR_LEN + ETHER_VLAN_ENCAP_LEN);
if (bootverbose)
if_printf(ifp, "TSO size max %u\n", ifp->if_hw_tsomax);
}
static void
hn_fixup_tx_data(struct hn_softc *sc)
{
uint64_t csum_assist;
int i;
hn_set_chim_size(sc, sc->hn_chim_szmax);
if (hn_tx_chimney_size > 0 &&
hn_tx_chimney_size < sc->hn_chim_szmax)
hn_set_chim_size(sc, hn_tx_chimney_size);
csum_assist = 0;
if (sc->hn_caps & HN_CAP_IPCS)
csum_assist |= CSUM_IP;
if (sc->hn_caps & HN_CAP_TCP4CS)
csum_assist |= CSUM_IP_TCP;
if (sc->hn_caps & HN_CAP_UDP4CS)
csum_assist |= CSUM_IP_UDP;
if (sc->hn_caps & HN_CAP_TCP6CS)
csum_assist |= CSUM_IP6_TCP;
if (sc->hn_caps & HN_CAP_UDP6CS)
csum_assist |= CSUM_IP6_UDP;
for (i = 0; i < sc->hn_tx_ring_cnt; ++i)
sc->hn_tx_ring[i].hn_csum_assist = csum_assist;
if (sc->hn_caps & HN_CAP_HASHVAL) {
/*
* Support HASHVAL pktinfo on TX path.
*/
if (bootverbose)
if_printf(sc->hn_ifp, "support HASHVAL pktinfo\n");
for (i = 0; i < sc->hn_tx_ring_cnt; ++i)
sc->hn_tx_ring[i].hn_tx_flags |= HN_TX_FLAG_HASHVAL;
}
}
static void
hn_destroy_tx_data(struct hn_softc *sc)
{
int i;
if (sc->hn_chim != NULL) {
hyperv_dmamem_free(&sc->hn_chim_dma, sc->hn_chim);
sc->hn_chim = NULL;
}
if (sc->hn_tx_ring_cnt == 0)
return;
for (i = 0; i < sc->hn_tx_ring_cnt; ++i)
hn_tx_ring_destroy(&sc->hn_tx_ring[i]);
free(sc->hn_tx_ring, M_DEVBUF);
sc->hn_tx_ring = NULL;
sc->hn_tx_ring_cnt = 0;
sc->hn_tx_ring_inuse = 0;
}
#ifdef HN_IFSTART_SUPPORT
static void
hn_start_taskfunc(void *xtxr, int pending __unused)
{
struct hn_tx_ring *txr = xtxr;
mtx_lock(&txr->hn_tx_lock);
hn_start_locked(txr, 0);
mtx_unlock(&txr->hn_tx_lock);
}
static int
hn_start_locked(struct hn_tx_ring *txr, int len)
{
struct hn_softc *sc = txr->hn_sc;
struct ifnet *ifp = sc->hn_ifp;
int sched = 0;
KASSERT(hn_use_if_start,
("hn_start_locked is called, when if_start is disabled"));
KASSERT(txr == &sc->hn_tx_ring[0], ("not the first TX ring"));
mtx_assert(&txr->hn_tx_lock, MA_OWNED);
KASSERT(txr->hn_agg_txd == NULL, ("lingering aggregating txdesc"));
if (__predict_false(txr->hn_suspended))
return (0);
if ((ifp->if_drv_flags & (IFF_DRV_RUNNING | IFF_DRV_OACTIVE)) !=
IFF_DRV_RUNNING)
return (0);
while (!IFQ_DRV_IS_EMPTY(&ifp->if_snd)) {
struct hn_txdesc *txd;
struct mbuf *m_head;
int error;
IFQ_DRV_DEQUEUE(&ifp->if_snd, m_head);
if (m_head == NULL)
break;
if (len > 0 && m_head->m_pkthdr.len > len) {
/*
* This sending could be time consuming; let callers
* dispatch this packet sending (and sending of any
* following up packets) to tx taskqueue.
*/
IFQ_DRV_PREPEND(&ifp->if_snd, m_head);
sched = 1;
break;
}
#if defined(INET6) || defined(INET)
if (m_head->m_pkthdr.csum_flags & CSUM_TSO) {
m_head = hn_tso_fixup(m_head);
if (__predict_false(m_head == NULL)) {
if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
continue;
}
}
#endif
txd = hn_txdesc_get(txr);
if (txd == NULL) {
txr->hn_no_txdescs++;
IFQ_DRV_PREPEND(&ifp->if_snd, m_head);
atomic_set_int(&ifp->if_drv_flags, IFF_DRV_OACTIVE);
break;
}
error = hn_encap(ifp, txr, txd, &m_head);
if (error) {
/* Both txd and m_head are freed */
KASSERT(txr->hn_agg_txd == NULL,
("encap failed w/ pending aggregating txdesc"));
continue;
}
if (txr->hn_agg_pktleft == 0) {
if (txr->hn_agg_txd != NULL) {
KASSERT(m_head == NULL,
("pending mbuf for aggregating txdesc"));
error = hn_flush_txagg(ifp, txr);
if (__predict_false(error)) {
atomic_set_int(&ifp->if_drv_flags,
IFF_DRV_OACTIVE);
break;
}
} else {
KASSERT(m_head != NULL, ("mbuf was freed"));
error = hn_txpkt(ifp, txr, txd);
if (__predict_false(error)) {
/* txd is freed, but m_head is not */
IFQ_DRV_PREPEND(&ifp->if_snd, m_head);
atomic_set_int(&ifp->if_drv_flags,
IFF_DRV_OACTIVE);
break;
}
}
}
#ifdef INVARIANTS
else {
KASSERT(txr->hn_agg_txd != NULL,
("no aggregating txdesc"));
KASSERT(m_head == NULL,
("pending mbuf for aggregating txdesc"));
}
#endif
}
/* Flush pending aggerated transmission. */
if (txr->hn_agg_txd != NULL)
hn_flush_txagg(ifp, txr);
return (sched);
}
static void
hn_start(struct ifnet *ifp)
{
struct hn_softc *sc = ifp->if_softc;
struct hn_tx_ring *txr = &sc->hn_tx_ring[0];
if (txr->hn_sched_tx)
goto do_sched;
if (mtx_trylock(&txr->hn_tx_lock)) {
int sched;
sched = hn_start_locked(txr, txr->hn_direct_tx_size);
mtx_unlock(&txr->hn_tx_lock);
if (!sched)
return;
}
do_sched:
taskqueue_enqueue(txr->hn_tx_taskq, &txr->hn_tx_task);
}
static void
hn_start_txeof_taskfunc(void *xtxr, int pending __unused)
{
struct hn_tx_ring *txr = xtxr;
mtx_lock(&txr->hn_tx_lock);
atomic_clear_int(&txr->hn_sc->hn_ifp->if_drv_flags, IFF_DRV_OACTIVE);
hn_start_locked(txr, 0);
mtx_unlock(&txr->hn_tx_lock);
}
static void
hn_start_txeof(struct hn_tx_ring *txr)
{
struct hn_softc *sc = txr->hn_sc;
struct ifnet *ifp = sc->hn_ifp;
KASSERT(txr == &sc->hn_tx_ring[0], ("not the first TX ring"));
if (txr->hn_sched_tx)
goto do_sched;
if (mtx_trylock(&txr->hn_tx_lock)) {
int sched;
atomic_clear_int(&ifp->if_drv_flags, IFF_DRV_OACTIVE);
sched = hn_start_locked(txr, txr->hn_direct_tx_size);
mtx_unlock(&txr->hn_tx_lock);
if (sched) {
taskqueue_enqueue(txr->hn_tx_taskq,
&txr->hn_tx_task);
}
} else {
do_sched:
/*
* Release the OACTIVE earlier, with the hope, that
* others could catch up. The task will clear the
* flag again with the hn_tx_lock to avoid possible
* races.
*/
atomic_clear_int(&ifp->if_drv_flags, IFF_DRV_OACTIVE);
taskqueue_enqueue(txr->hn_tx_taskq, &txr->hn_txeof_task);
}
}
#endif /* HN_IFSTART_SUPPORT */
static int
hn_xmit(struct hn_tx_ring *txr, int len)
{
struct hn_softc *sc = txr->hn_sc;
struct ifnet *ifp = sc->hn_ifp;
struct mbuf *m_head;
int sched = 0;
mtx_assert(&txr->hn_tx_lock, MA_OWNED);
#ifdef HN_IFSTART_SUPPORT
KASSERT(hn_use_if_start == 0,
("hn_xmit is called, when if_start is enabled"));
#endif
KASSERT(txr->hn_agg_txd == NULL, ("lingering aggregating txdesc"));
if (__predict_false(txr->hn_suspended))
return (0);
if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0 || txr->hn_oactive)
return (0);
while ((m_head = drbr_peek(ifp, txr->hn_mbuf_br)) != NULL) {
struct hn_txdesc *txd;
int error;
if (len > 0 && m_head->m_pkthdr.len > len) {
/*
* This sending could be time consuming; let callers
* dispatch this packet sending (and sending of any
* following up packets) to tx taskqueue.
*/
drbr_putback(ifp, txr->hn_mbuf_br, m_head);
sched = 1;
break;
}
txd = hn_txdesc_get(txr);
if (txd == NULL) {
txr->hn_no_txdescs++;
drbr_putback(ifp, txr->hn_mbuf_br, m_head);
txr->hn_oactive = 1;
break;
}
error = hn_encap(ifp, txr, txd, &m_head);
if (error) {
/* Both txd and m_head are freed; discard */
KASSERT(txr->hn_agg_txd == NULL,
("encap failed w/ pending aggregating txdesc"));
drbr_advance(ifp, txr->hn_mbuf_br);
continue;
}
if (txr->hn_agg_pktleft == 0) {
if (txr->hn_agg_txd != NULL) {
KASSERT(m_head == NULL,
("pending mbuf for aggregating txdesc"));
error = hn_flush_txagg(ifp, txr);
if (__predict_false(error)) {
txr->hn_oactive = 1;
break;
}
} else {
KASSERT(m_head != NULL, ("mbuf was freed"));
error = hn_txpkt(ifp, txr, txd);
if (__predict_false(error)) {
/* txd is freed, but m_head is not */
drbr_putback(ifp, txr->hn_mbuf_br,
m_head);
txr->hn_oactive = 1;
break;
}
}
}
#ifdef INVARIANTS
else {
KASSERT(txr->hn_agg_txd != NULL,
("no aggregating txdesc"));
KASSERT(m_head == NULL,
("pending mbuf for aggregating txdesc"));
}
#endif
/* Sent */
drbr_advance(ifp, txr->hn_mbuf_br);
}
/* Flush pending aggerated transmission. */
if (txr->hn_agg_txd != NULL)
hn_flush_txagg(ifp, txr);
return (sched);
}
static int
hn_transmit(struct ifnet *ifp, struct mbuf *m)
{
struct hn_softc *sc = ifp->if_softc;
struct hn_tx_ring *txr;
int error, idx = 0;
#if defined(INET6) || defined(INET)
/*
* Perform TSO packet header fixup now, since the TSO
* packet header should be cache-hot.
*/
if (m->m_pkthdr.csum_flags & CSUM_TSO) {
m = hn_tso_fixup(m);
if (__predict_false(m == NULL)) {
if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
return EIO;
}
}
#endif
/*
* Select the TX ring based on flowid
*/
if (M_HASHTYPE_GET(m) != M_HASHTYPE_NONE)
idx = m->m_pkthdr.flowid % sc->hn_tx_ring_inuse;
txr = &sc->hn_tx_ring[idx];
error = drbr_enqueue(ifp, txr->hn_mbuf_br, m);
if (error) {
if_inc_counter(ifp, IFCOUNTER_OQDROPS, 1);
return error;
}
if (txr->hn_oactive)
return 0;
if (txr->hn_sched_tx)
goto do_sched;
if (mtx_trylock(&txr->hn_tx_lock)) {
int sched;
sched = hn_xmit(txr, txr->hn_direct_tx_size);
mtx_unlock(&txr->hn_tx_lock);
if (!sched)
return 0;
}
do_sched:
taskqueue_enqueue(txr->hn_tx_taskq, &txr->hn_tx_task);
return 0;
}
static void
hn_tx_ring_qflush(struct hn_tx_ring *txr)
{
struct mbuf *m;
mtx_lock(&txr->hn_tx_lock);
while ((m = buf_ring_dequeue_sc(txr->hn_mbuf_br)) != NULL)
m_freem(m);
mtx_unlock(&txr->hn_tx_lock);
}
static void
hn_xmit_qflush(struct ifnet *ifp)
{
struct hn_softc *sc = ifp->if_softc;
int i;
for (i = 0; i < sc->hn_tx_ring_inuse; ++i)
hn_tx_ring_qflush(&sc->hn_tx_ring[i]);
if_qflush(ifp);
}
static void
hn_xmit_txeof(struct hn_tx_ring *txr)
{
if (txr->hn_sched_tx)
goto do_sched;
if (mtx_trylock(&txr->hn_tx_lock)) {
int sched;
txr->hn_oactive = 0;
sched = hn_xmit(txr, txr->hn_direct_tx_size);
mtx_unlock(&txr->hn_tx_lock);
if (sched) {
taskqueue_enqueue(txr->hn_tx_taskq,
&txr->hn_tx_task);
}
} else {
do_sched:
/*
* Release the oactive earlier, with the hope, that
* others could catch up. The task will clear the
* oactive again with the hn_tx_lock to avoid possible
* races.
*/
txr->hn_oactive = 0;
taskqueue_enqueue(txr->hn_tx_taskq, &txr->hn_txeof_task);
}
}
static void
hn_xmit_taskfunc(void *xtxr, int pending __unused)
{
struct hn_tx_ring *txr = xtxr;
mtx_lock(&txr->hn_tx_lock);
hn_xmit(txr, 0);
mtx_unlock(&txr->hn_tx_lock);
}
static void
hn_xmit_txeof_taskfunc(void *xtxr, int pending __unused)
{
struct hn_tx_ring *txr = xtxr;
mtx_lock(&txr->hn_tx_lock);
txr->hn_oactive = 0;
hn_xmit(txr, 0);
mtx_unlock(&txr->hn_tx_lock);
}
static int
hn_chan_attach(struct hn_softc *sc, struct vmbus_channel *chan)
{
struct vmbus_chan_br cbr;
struct hn_rx_ring *rxr;
struct hn_tx_ring *txr = NULL;
int idx, error;
idx = vmbus_chan_subidx(chan);
/*
* Link this channel to RX/TX ring.
*/
KASSERT(idx >= 0 && idx < sc->hn_rx_ring_inuse,
("invalid channel index %d, should > 0 && < %d",
idx, sc->hn_rx_ring_inuse));
rxr = &sc->hn_rx_ring[idx];
KASSERT((rxr->hn_rx_flags & HN_RX_FLAG_ATTACHED) == 0,
("RX ring %d already attached", idx));
rxr->hn_rx_flags |= HN_RX_FLAG_ATTACHED;
if (bootverbose) {
if_printf(sc->hn_ifp, "link RX ring %d to chan%u\n",
idx, vmbus_chan_id(chan));
}
if (idx < sc->hn_tx_ring_inuse) {
txr = &sc->hn_tx_ring[idx];
KASSERT((txr->hn_tx_flags & HN_TX_FLAG_ATTACHED) == 0,
("TX ring %d already attached", idx));
txr->hn_tx_flags |= HN_TX_FLAG_ATTACHED;
txr->hn_chan = chan;
if (bootverbose) {
if_printf(sc->hn_ifp, "link TX ring %d to chan%u\n",
idx, vmbus_chan_id(chan));
}
}
/* Bind this channel to a proper CPU. */
vmbus_chan_cpu_set(chan, (sc->hn_cpu + idx) % mp_ncpus);
/*
* Open this channel
*/
cbr.cbr = rxr->hn_br;
cbr.cbr_paddr = rxr->hn_br_dma.hv_paddr;
cbr.cbr_txsz = HN_TXBR_SIZE;
cbr.cbr_rxsz = HN_RXBR_SIZE;
error = vmbus_chan_open_br(chan, &cbr, NULL, 0, hn_chan_callback, rxr);
if (error) {
if_printf(sc->hn_ifp, "open chan%u failed: %d\n",
vmbus_chan_id(chan), error);
rxr->hn_rx_flags &= ~HN_RX_FLAG_ATTACHED;
if (txr != NULL)
txr->hn_tx_flags &= ~HN_TX_FLAG_ATTACHED;
}
return (error);
}
static void
hn_chan_detach(struct hn_softc *sc, struct vmbus_channel *chan)
{
struct hn_rx_ring *rxr;
int idx;
idx = vmbus_chan_subidx(chan);
/*
* Link this channel to RX/TX ring.
*/
KASSERT(idx >= 0 && idx < sc->hn_rx_ring_inuse,
("invalid channel index %d, should > 0 && < %d",
idx, sc->hn_rx_ring_inuse));
rxr = &sc->hn_rx_ring[idx];
KASSERT((rxr->hn_rx_flags & HN_RX_FLAG_ATTACHED),
("RX ring %d is not attached", idx));
rxr->hn_rx_flags &= ~HN_RX_FLAG_ATTACHED;
if (idx < sc->hn_tx_ring_inuse) {
struct hn_tx_ring *txr = &sc->hn_tx_ring[idx];
KASSERT((txr->hn_tx_flags & HN_TX_FLAG_ATTACHED),
("TX ring %d is not attached attached", idx));
txr->hn_tx_flags &= ~HN_TX_FLAG_ATTACHED;
}
/*
* Close this channel.
*
* NOTE:
* Channel closing does _not_ destroy the target channel.
*/
vmbus_chan_close(chan);
}
static int
hn_attach_subchans(struct hn_softc *sc)
{
struct vmbus_channel **subchans;
int subchan_cnt = sc->hn_rx_ring_inuse - 1;
int i, error = 0;
if (subchan_cnt == 0)
return (0);
/* Attach the sub-channels. */
subchans = vmbus_subchan_get(sc->hn_prichan, subchan_cnt);
for (i = 0; i < subchan_cnt; ++i) {
error = hn_chan_attach(sc, subchans[i]);
if (error)
break;
}
vmbus_subchan_rel(subchans, subchan_cnt);
if (error) {
if_printf(sc->hn_ifp, "sub-channels attach failed: %d\n", error);
} else {
if (bootverbose) {
if_printf(sc->hn_ifp, "%d sub-channels attached\n",
subchan_cnt);
}
}
return (error);
}
static void
hn_detach_allchans(struct hn_softc *sc)
{
struct vmbus_channel **subchans;
int subchan_cnt = sc->hn_rx_ring_inuse - 1;
int i;
if (subchan_cnt == 0)
goto back;
/* Detach the sub-channels. */
subchans = vmbus_subchan_get(sc->hn_prichan, subchan_cnt);
for (i = 0; i < subchan_cnt; ++i)
hn_chan_detach(sc, subchans[i]);
vmbus_subchan_rel(subchans, subchan_cnt);
back:
/*
* Detach the primary channel, _after_ all sub-channels
* are detached.
*/
hn_chan_detach(sc, sc->hn_prichan);
/* Wait for sub-channels to be destroyed, if any. */
vmbus_subchan_drain(sc->hn_prichan);
#ifdef INVARIANTS
for (i = 0; i < sc->hn_rx_ring_cnt; ++i) {
KASSERT((sc->hn_rx_ring[i].hn_rx_flags &
HN_RX_FLAG_ATTACHED) == 0,
("%dth RX ring is still attached", i));
}
for (i = 0; i < sc->hn_tx_ring_cnt; ++i) {
KASSERT((sc->hn_tx_ring[i].hn_tx_flags &
HN_TX_FLAG_ATTACHED) == 0,
("%dth TX ring is still attached", i));
}
#endif
}
static int
hn_synth_alloc_subchans(struct hn_softc *sc, int *nsubch)
{
struct vmbus_channel **subchans;
int nchan, rxr_cnt, error;
nchan = *nsubch + 1;
if (nchan == 1) {
/*
* Multiple RX/TX rings are not requested.
*/
*nsubch = 0;
return (0);
}
/*
* Query RSS capabilities, e.g. # of RX rings, and # of indirect
* table entries.
*/
error = hn_rndis_query_rsscaps(sc, &rxr_cnt);
if (error) {
/* No RSS; this is benign. */
*nsubch = 0;
return (0);
}
if (bootverbose) {
if_printf(sc->hn_ifp, "RX rings offered %u, requested %d\n",
rxr_cnt, nchan);
}
if (nchan > rxr_cnt)
nchan = rxr_cnt;
if (nchan == 1) {
if_printf(sc->hn_ifp, "only 1 channel is supported, no vRSS\n");
*nsubch = 0;
return (0);
}
/*
* Allocate sub-channels from NVS.
*/
*nsubch = nchan - 1;
error = hn_nvs_alloc_subchans(sc, nsubch);
if (error || *nsubch == 0) {
/* Failed to allocate sub-channels. */
*nsubch = 0;
return (0);
}
/*
* Wait for all sub-channels to become ready before moving on.
*/
subchans = vmbus_subchan_get(sc->hn_prichan, *nsubch);
vmbus_subchan_rel(subchans, *nsubch);
return (0);
}
static int
hn_synth_attach(struct hn_softc *sc, int mtu)
{
struct ndis_rssprm_toeplitz *rss = &sc->hn_rss;
int error, nsubch, nchan, i;
uint32_t old_caps;
KASSERT((sc->hn_flags & HN_FLAG_SYNTH_ATTACHED) == 0,
("synthetic parts were attached"));
/* Save capabilities for later verification. */
old_caps = sc->hn_caps;
sc->hn_caps = 0;
/* Clear RSS stuffs. */
sc->hn_rss_ind_size = 0;
sc->hn_rss_hash = 0;
/*
* Attach the primary channel _before_ attaching NVS and RNDIS.
*/
error = hn_chan_attach(sc, sc->hn_prichan);
if (error)
return (error);
/*
* Attach NVS.
*/
error = hn_nvs_attach(sc, mtu);
if (error)
return (error);
/*
* Attach RNDIS _after_ NVS is attached.
*/
error = hn_rndis_attach(sc, mtu);
if (error)
return (error);
/*
* Make sure capabilities are not changed.
*/
if (device_is_attached(sc->hn_dev) && old_caps != sc->hn_caps) {
if_printf(sc->hn_ifp, "caps mismatch old 0x%08x, new 0x%08x\n",
old_caps, sc->hn_caps);
/* Restore old capabilities and abort. */
sc->hn_caps = old_caps;
return ENXIO;
}
/*
* Allocate sub-channels for multi-TX/RX rings.
*
* NOTE:
* The # of RX rings that can be used is equivalent to the # of
* channels to be requested.
*/
nsubch = sc->hn_rx_ring_cnt - 1;
error = hn_synth_alloc_subchans(sc, &nsubch);
if (error)
return (error);
nchan = nsubch + 1;
if (nchan == 1) {
/* Only the primary channel can be used; done */
goto back;
}
/*
* Configure RSS key and indirect table _after_ all sub-channels
* are allocated.
*/
if ((sc->hn_flags & HN_FLAG_HAS_RSSKEY) == 0) {
/*
* RSS key is not set yet; set it to the default RSS key.
*/
if (bootverbose)
if_printf(sc->hn_ifp, "setup default RSS key\n");
memcpy(rss->rss_key, hn_rss_key_default, sizeof(rss->rss_key));
sc->hn_flags |= HN_FLAG_HAS_RSSKEY;
}
if ((sc->hn_flags & HN_FLAG_HAS_RSSIND) == 0) {
/*
* RSS indirect table is not set yet; set it up in round-
* robin fashion.
*/
if (bootverbose) {
if_printf(sc->hn_ifp, "setup default RSS indirect "
"table\n");
}
for (i = 0; i < NDIS_HASH_INDCNT; ++i)
rss->rss_ind[i] = i % nchan;
sc->hn_flags |= HN_FLAG_HAS_RSSIND;
} else {
/*
* # of usable channels may be changed, so we have to
* make sure that all entries in RSS indirect table
* are valid.
*/
hn_rss_ind_fixup(sc, nchan);
}
error = hn_rndis_conf_rss(sc, NDIS_RSS_FLAG_NONE);
if (error) {
/*
* Failed to configure RSS key or indirect table; only
* the primary channel can be used.
*/
nchan = 1;
}
back:
/*
* Set the # of TX/RX rings that could be used according to
* the # of channels that NVS offered.
*/
hn_set_ring_inuse(sc, nchan);
/*
* Attach the sub-channels, if any.
*/
error = hn_attach_subchans(sc);
if (error)
return (error);
/*
* Fixup transmission aggregation setup.
*/
hn_set_txagg(sc);
sc->hn_flags |= HN_FLAG_SYNTH_ATTACHED;
return (0);
}
/*
* NOTE:
* The interface must have been suspended though hn_suspend(), before
* this function get called.
*/
static void
hn_synth_detach(struct hn_softc *sc)
{
HN_LOCK_ASSERT(sc);
KASSERT(sc->hn_flags & HN_FLAG_SYNTH_ATTACHED,
("synthetic parts were not attached"));
/* Detach the RNDIS first. */
hn_rndis_detach(sc);
/* Detach NVS. */
hn_nvs_detach(sc);
/* Detach all of the channels. */
hn_detach_allchans(sc);
sc->hn_flags &= ~HN_FLAG_SYNTH_ATTACHED;
}
static void
hn_set_ring_inuse(struct hn_softc *sc, int ring_cnt)
{
KASSERT(ring_cnt > 0 && ring_cnt <= sc->hn_rx_ring_cnt,
("invalid ring count %d", ring_cnt));
if (sc->hn_tx_ring_cnt > ring_cnt)
sc->hn_tx_ring_inuse = ring_cnt;
else
sc->hn_tx_ring_inuse = sc->hn_tx_ring_cnt;
sc->hn_rx_ring_inuse = ring_cnt;
if (bootverbose) {
if_printf(sc->hn_ifp, "%d TX ring, %d RX ring\n",
sc->hn_tx_ring_inuse, sc->hn_rx_ring_inuse);
}
}
static void
hn_chan_drain(struct hn_softc *sc, struct vmbus_channel *chan)
{
/*
* NOTE:
* The TX bufring will not be drained by the hypervisor,
* if the primary channel is revoked.
*/
while (!vmbus_chan_rx_empty(chan) ||
(!vmbus_chan_is_revoked(sc->hn_prichan) &&
!vmbus_chan_tx_empty(chan)))
pause("waitch", 1);
vmbus_chan_intr_drain(chan);
}
static void
hn_suspend_data(struct hn_softc *sc)
{
struct vmbus_channel **subch = NULL;
struct hn_tx_ring *txr;
int i, nsubch;
HN_LOCK_ASSERT(sc);
/*
* Suspend TX.
*/
for (i = 0; i < sc->hn_tx_ring_inuse; ++i) {
txr = &sc->hn_tx_ring[i];
mtx_lock(&txr->hn_tx_lock);
txr->hn_suspended = 1;
mtx_unlock(&txr->hn_tx_lock);
/* No one is able send more packets now. */
/*
* Wait for all pending sends to finish.
*
* NOTE:
* We will _not_ receive all pending send-done, if the
* primary channel is revoked.
*/
while (hn_tx_ring_pending(txr) &&
!vmbus_chan_is_revoked(sc->hn_prichan))
pause("hnwtx", 1 /* 1 tick */);
}
/*
* Disable RX by clearing RX filter.
*/
sc->hn_rx_filter = NDIS_PACKET_TYPE_NONE;
hn_rndis_set_rxfilter(sc, sc->hn_rx_filter);
/*
* Give RNDIS enough time to flush all pending data packets.
*/
pause("waitrx", (200 * hz) / 1000);
/*
* Drain RX/TX bufrings and interrupts.
*/
nsubch = sc->hn_rx_ring_inuse - 1;
if (nsubch > 0)
subch = vmbus_subchan_get(sc->hn_prichan, nsubch);
if (subch != NULL) {
for (i = 0; i < nsubch; ++i)
hn_chan_drain(sc, subch[i]);
}
hn_chan_drain(sc, sc->hn_prichan);
if (subch != NULL)
vmbus_subchan_rel(subch, nsubch);
/*
* Drain any pending TX tasks.
*
* NOTE:
* The above hn_chan_drain() can dispatch TX tasks, so the TX
* tasks will have to be drained _after_ the above hn_chan_drain()
* calls.
*/
for (i = 0; i < sc->hn_tx_ring_inuse; ++i) {
txr = &sc->hn_tx_ring[i];
taskqueue_drain(txr->hn_tx_taskq, &txr->hn_tx_task);
taskqueue_drain(txr->hn_tx_taskq, &txr->hn_txeof_task);
}
}
static void
hn_suspend_mgmt_taskfunc(void *xsc, int pending __unused)
{
((struct hn_softc *)xsc)->hn_mgmt_taskq = NULL;
}
static void
hn_suspend_mgmt(struct hn_softc *sc)
{
struct task task;
HN_LOCK_ASSERT(sc);
/*
* Make sure that hn_mgmt_taskq0 can nolonger be accessed
* through hn_mgmt_taskq.
*/
TASK_INIT(&task, 0, hn_suspend_mgmt_taskfunc, sc);
vmbus_chan_run_task(sc->hn_prichan, &task);
/*
* Make sure that all pending management tasks are completed.
*/
taskqueue_drain(sc->hn_mgmt_taskq0, &sc->hn_netchg_init);
taskqueue_drain_timeout(sc->hn_mgmt_taskq0, &sc->hn_netchg_status);
taskqueue_drain_all(sc->hn_mgmt_taskq0);
}
static void
hn_suspend(struct hn_softc *sc)
{
if (sc->hn_ifp->if_drv_flags & IFF_DRV_RUNNING)
hn_suspend_data(sc);
hn_suspend_mgmt(sc);
}
static void
hn_resume_tx(struct hn_softc *sc, int tx_ring_cnt)
{
int i;
KASSERT(tx_ring_cnt <= sc->hn_tx_ring_cnt,
("invalid TX ring count %d", tx_ring_cnt));
for (i = 0; i < tx_ring_cnt; ++i) {
struct hn_tx_ring *txr = &sc->hn_tx_ring[i];
mtx_lock(&txr->hn_tx_lock);
txr->hn_suspended = 0;
mtx_unlock(&txr->hn_tx_lock);
}
}
static void
hn_resume_data(struct hn_softc *sc)
{
int i;
HN_LOCK_ASSERT(sc);
/*
* Re-enable RX.
*/
hn_set_rxfilter(sc);
/*
* Make sure to clear suspend status on "all" TX rings,
* since hn_tx_ring_inuse can be changed after
* hn_suspend_data().
*/
hn_resume_tx(sc, sc->hn_tx_ring_cnt);
#ifdef HN_IFSTART_SUPPORT
if (!hn_use_if_start)
#endif
{
/*
* Flush unused drbrs, since hn_tx_ring_inuse may be
* reduced.
*/
for (i = sc->hn_tx_ring_inuse; i < sc->hn_tx_ring_cnt; ++i)
hn_tx_ring_qflush(&sc->hn_tx_ring[i]);
}
/*
* Kick start TX.
*/
for (i = 0; i < sc->hn_tx_ring_inuse; ++i) {
struct hn_tx_ring *txr = &sc->hn_tx_ring[i];
/*
* Use txeof task, so that any pending oactive can be
* cleared properly.
*/
taskqueue_enqueue(txr->hn_tx_taskq, &txr->hn_txeof_task);
}
}
static void
hn_resume_mgmt(struct hn_softc *sc)
{
sc->hn_mgmt_taskq = sc->hn_mgmt_taskq0;
/*
* Kick off network change detection, if it was pending.
* If no network change was pending, start link status
* checks, which is more lightweight than network change
* detection.
*/
if (sc->hn_link_flags & HN_LINK_FLAG_NETCHG)
hn_change_network(sc);
else
hn_update_link_status(sc);
}
static void
hn_resume(struct hn_softc *sc)
{
if (sc->hn_ifp->if_drv_flags & IFF_DRV_RUNNING)
hn_resume_data(sc);
hn_resume_mgmt(sc);
}
static void
hn_rndis_rx_status(struct hn_softc *sc, const void *data, int dlen)
{
const struct rndis_status_msg *msg;
int ofs;
if (dlen < sizeof(*msg)) {
if_printf(sc->hn_ifp, "invalid RNDIS status\n");
return;
}
msg = data;
switch (msg->rm_status) {
case RNDIS_STATUS_MEDIA_CONNECT:
case RNDIS_STATUS_MEDIA_DISCONNECT:
hn_update_link_status(sc);
break;
case RNDIS_STATUS_TASK_OFFLOAD_CURRENT_CONFIG:
/* Not really useful; ignore. */
break;
case RNDIS_STATUS_NETWORK_CHANGE:
ofs = RNDIS_STBUFOFFSET_ABS(msg->rm_stbufoffset);
if (dlen < ofs + msg->rm_stbuflen ||
msg->rm_stbuflen < sizeof(uint32_t)) {
if_printf(sc->hn_ifp, "network changed\n");
} else {
uint32_t change;
memcpy(&change, ((const uint8_t *)msg) + ofs,
sizeof(change));
if_printf(sc->hn_ifp, "network changed, change %u\n",
change);
}
hn_change_network(sc);
break;
default:
if_printf(sc->hn_ifp, "unknown RNDIS status 0x%08x\n",
msg->rm_status);
break;
}
}
static int
hn_rndis_rxinfo(const void *info_data, int info_dlen, struct hn_rxinfo *info)
{
const struct rndis_pktinfo *pi = info_data;
uint32_t mask = 0;
while (info_dlen != 0) {
const void *data;
uint32_t dlen;
if (__predict_false(info_dlen < sizeof(*pi)))
return (EINVAL);
if (__predict_false(info_dlen < pi->rm_size))
return (EINVAL);
info_dlen -= pi->rm_size;
if (__predict_false(pi->rm_size & RNDIS_PKTINFO_SIZE_ALIGNMASK))
return (EINVAL);
if (__predict_false(pi->rm_size < pi->rm_pktinfooffset))
return (EINVAL);
dlen = pi->rm_size - pi->rm_pktinfooffset;
data = pi->rm_data;
switch (pi->rm_type) {
case NDIS_PKTINFO_TYPE_VLAN:
if (__predict_false(dlen < NDIS_VLAN_INFO_SIZE))
return (EINVAL);
info->vlan_info = *((const uint32_t *)data);
mask |= HN_RXINFO_VLAN;
break;
case NDIS_PKTINFO_TYPE_CSUM:
if (__predict_false(dlen < NDIS_RXCSUM_INFO_SIZE))
return (EINVAL);
info->csum_info = *((const uint32_t *)data);
mask |= HN_RXINFO_CSUM;
break;
case HN_NDIS_PKTINFO_TYPE_HASHVAL:
if (__predict_false(dlen < HN_NDIS_HASH_VALUE_SIZE))
return (EINVAL);
info->hash_value = *((const uint32_t *)data);
mask |= HN_RXINFO_HASHVAL;
break;
case HN_NDIS_PKTINFO_TYPE_HASHINF:
if (__predict_false(dlen < HN_NDIS_HASH_INFO_SIZE))
return (EINVAL);
info->hash_info = *((const uint32_t *)data);
mask |= HN_RXINFO_HASHINF;
break;
default:
goto next;
}
if (mask == HN_RXINFO_ALL) {
/* All found; done */
break;
}
next:
pi = (const struct rndis_pktinfo *)
((const uint8_t *)pi + pi->rm_size);
}
/*
* Final fixup.
* - If there is no hash value, invalidate the hash info.
*/
if ((mask & HN_RXINFO_HASHVAL) == 0)
info->hash_info = HN_NDIS_HASH_INFO_INVALID;
return (0);
}
static __inline bool
hn_rndis_check_overlap(int off, int len, int check_off, int check_len)
{
if (off < check_off) {
if (__predict_true(off + len <= check_off))
return (false);
} else if (off > check_off) {
if (__predict_true(check_off + check_len <= off))
return (false);
}
return (true);
}
static void
hn_rndis_rx_data(struct hn_rx_ring *rxr, const void *data, int dlen)
{
const struct rndis_packet_msg *pkt;
struct hn_rxinfo info;
int data_off, pktinfo_off, data_len, pktinfo_len;
/*
* Check length.
*/
if (__predict_false(dlen < sizeof(*pkt))) {
if_printf(rxr->hn_ifp, "invalid RNDIS packet msg\n");
return;
}
pkt = data;
if (__predict_false(dlen < pkt->rm_len)) {
if_printf(rxr->hn_ifp, "truncated RNDIS packet msg, "
"dlen %d, msglen %u\n", dlen, pkt->rm_len);
return;
}
if (__predict_false(pkt->rm_len <
pkt->rm_datalen + pkt->rm_oobdatalen + pkt->rm_pktinfolen)) {
if_printf(rxr->hn_ifp, "invalid RNDIS packet msglen, "
"msglen %u, data %u, oob %u, pktinfo %u\n",
pkt->rm_len, pkt->rm_datalen, pkt->rm_oobdatalen,
pkt->rm_pktinfolen);
return;
}
if (__predict_false(pkt->rm_datalen == 0)) {
if_printf(rxr->hn_ifp, "invalid RNDIS packet msg, no data\n");
return;
}
/*
* Check offests.
*/
#define IS_OFFSET_INVALID(ofs) \
((ofs) < RNDIS_PACKET_MSG_OFFSET_MIN || \
((ofs) & RNDIS_PACKET_MSG_OFFSET_ALIGNMASK))
/* XXX Hyper-V does not meet data offset alignment requirement */
if (__predict_false(pkt->rm_dataoffset < RNDIS_PACKET_MSG_OFFSET_MIN)) {
if_printf(rxr->hn_ifp, "invalid RNDIS packet msg, "
"data offset %u\n", pkt->rm_dataoffset);
return;
}
if (__predict_false(pkt->rm_oobdataoffset > 0 &&
IS_OFFSET_INVALID(pkt->rm_oobdataoffset))) {
if_printf(rxr->hn_ifp, "invalid RNDIS packet msg, "
"oob offset %u\n", pkt->rm_oobdataoffset);
return;
}
if (__predict_true(pkt->rm_pktinfooffset > 0) &&
__predict_false(IS_OFFSET_INVALID(pkt->rm_pktinfooffset))) {
if_printf(rxr->hn_ifp, "invalid RNDIS packet msg, "
"pktinfo offset %u\n", pkt->rm_pktinfooffset);
return;
}
#undef IS_OFFSET_INVALID
data_off = RNDIS_PACKET_MSG_OFFSET_ABS(pkt->rm_dataoffset);
data_len = pkt->rm_datalen;
pktinfo_off = RNDIS_PACKET_MSG_OFFSET_ABS(pkt->rm_pktinfooffset);
pktinfo_len = pkt->rm_pktinfolen;
/*
* Check OOB coverage.
*/
if (__predict_false(pkt->rm_oobdatalen != 0)) {
int oob_off, oob_len;
if_printf(rxr->hn_ifp, "got oobdata\n");
oob_off = RNDIS_PACKET_MSG_OFFSET_ABS(pkt->rm_oobdataoffset);
oob_len = pkt->rm_oobdatalen;
if (__predict_false(oob_off + oob_len > pkt->rm_len)) {
if_printf(rxr->hn_ifp, "invalid RNDIS packet msg, "
"oob overflow, msglen %u, oob abs %d len %d\n",
pkt->rm_len, oob_off, oob_len);
return;
}
/*
* Check against data.
*/
if (hn_rndis_check_overlap(oob_off, oob_len,
data_off, data_len)) {
if_printf(rxr->hn_ifp, "invalid RNDIS packet msg, "
"oob overlaps data, oob abs %d len %d, "
"data abs %d len %d\n",
oob_off, oob_len, data_off, data_len);
return;
}
/*
* Check against pktinfo.
*/
if (pktinfo_len != 0 &&
hn_rndis_check_overlap(oob_off, oob_len,
pktinfo_off, pktinfo_len)) {
if_printf(rxr->hn_ifp, "invalid RNDIS packet msg, "
"oob overlaps pktinfo, oob abs %d len %d, "
"pktinfo abs %d len %d\n",
oob_off, oob_len, pktinfo_off, pktinfo_len);
return;
}
}
/*
* Check per-packet-info coverage and find useful per-packet-info.
*/
info.vlan_info = HN_NDIS_VLAN_INFO_INVALID;
info.csum_info = HN_NDIS_RXCSUM_INFO_INVALID;
info.hash_info = HN_NDIS_HASH_INFO_INVALID;
if (__predict_true(pktinfo_len != 0)) {
bool overlap;
int error;
if (__predict_false(pktinfo_off + pktinfo_len > pkt->rm_len)) {
if_printf(rxr->hn_ifp, "invalid RNDIS packet msg, "
"pktinfo overflow, msglen %u, "
"pktinfo abs %d len %d\n",
pkt->rm_len, pktinfo_off, pktinfo_len);
return;
}
/*
* Check packet info coverage.
*/
overlap = hn_rndis_check_overlap(pktinfo_off, pktinfo_len,
data_off, data_len);
if (__predict_false(overlap)) {
if_printf(rxr->hn_ifp, "invalid RNDIS packet msg, "
"pktinfo overlap data, pktinfo abs %d len %d, "
"data abs %d len %d\n",
pktinfo_off, pktinfo_len, data_off, data_len);
return;
}
/*
* Find useful per-packet-info.
*/
error = hn_rndis_rxinfo(((const uint8_t *)pkt) + pktinfo_off,
pktinfo_len, &info);
if (__predict_false(error)) {
if_printf(rxr->hn_ifp, "invalid RNDIS packet msg "
"pktinfo\n");
return;
}
}
if (__predict_false(data_off + data_len > pkt->rm_len)) {
if_printf(rxr->hn_ifp, "invalid RNDIS packet msg, "
"data overflow, msglen %u, data abs %d len %d\n",
pkt->rm_len, data_off, data_len);
return;
}
hn_rxpkt(rxr, ((const uint8_t *)pkt) + data_off, data_len, &info);
}
static __inline void
hn_rndis_rxpkt(struct hn_rx_ring *rxr, const void *data, int dlen)
{
const struct rndis_msghdr *hdr;
if (__predict_false(dlen < sizeof(*hdr))) {
if_printf(rxr->hn_ifp, "invalid RNDIS msg\n");
return;
}
hdr = data;
if (__predict_true(hdr->rm_type == REMOTE_NDIS_PACKET_MSG)) {
/* Hot data path. */
hn_rndis_rx_data(rxr, data, dlen);
/* Done! */
return;
}
if (hdr->rm_type == REMOTE_NDIS_INDICATE_STATUS_MSG)
hn_rndis_rx_status(rxr->hn_ifp->if_softc, data, dlen);
else
hn_rndis_rx_ctrl(rxr->hn_ifp->if_softc, data, dlen);
}
static void
hn_nvs_handle_notify(struct hn_softc *sc, const struct vmbus_chanpkt_hdr *pkt)
{
const struct hn_nvs_hdr *hdr;
if (VMBUS_CHANPKT_DATALEN(pkt) < sizeof(*hdr)) {
if_printf(sc->hn_ifp, "invalid nvs notify\n");
return;
}
hdr = VMBUS_CHANPKT_CONST_DATA(pkt);
if (hdr->nvs_type == HN_NVS_TYPE_TXTBL_NOTE) {
/* Useless; ignore */
return;
}
if_printf(sc->hn_ifp, "got notify, nvs type %u\n", hdr->nvs_type);
}
static void
hn_nvs_handle_comp(struct hn_softc *sc, struct vmbus_channel *chan,
const struct vmbus_chanpkt_hdr *pkt)
{
struct hn_nvs_sendctx *sndc;
sndc = (struct hn_nvs_sendctx *)(uintptr_t)pkt->cph_xactid;
sndc->hn_cb(sndc, sc, chan, VMBUS_CHANPKT_CONST_DATA(pkt),
VMBUS_CHANPKT_DATALEN(pkt));
/*
* NOTE:
* 'sndc' CAN NOT be accessed anymore, since it can be freed by
* its callback.
*/
}
static void
hn_nvs_handle_rxbuf(struct hn_rx_ring *rxr, struct vmbus_channel *chan,
const struct vmbus_chanpkt_hdr *pkthdr)
{
const struct vmbus_chanpkt_rxbuf *pkt;
const struct hn_nvs_hdr *nvs_hdr;
int count, i, hlen;
if (__predict_false(VMBUS_CHANPKT_DATALEN(pkthdr) < sizeof(*nvs_hdr))) {
if_printf(rxr->hn_ifp, "invalid nvs RNDIS\n");
return;
}
nvs_hdr = VMBUS_CHANPKT_CONST_DATA(pkthdr);
/* Make sure that this is a RNDIS message. */
if (__predict_false(nvs_hdr->nvs_type != HN_NVS_TYPE_RNDIS)) {
if_printf(rxr->hn_ifp, "nvs type %u, not RNDIS\n",
nvs_hdr->nvs_type);
return;
}
hlen = VMBUS_CHANPKT_GETLEN(pkthdr->cph_hlen);
if (__predict_false(hlen < sizeof(*pkt))) {
if_printf(rxr->hn_ifp, "invalid rxbuf chanpkt\n");
return;
}
pkt = (const struct vmbus_chanpkt_rxbuf *)pkthdr;
if (__predict_false(pkt->cp_rxbuf_id != HN_NVS_RXBUF_SIG)) {
if_printf(rxr->hn_ifp, "invalid rxbuf_id 0x%08x\n",
pkt->cp_rxbuf_id);
return;
}
count = pkt->cp_rxbuf_cnt;
if (__predict_false(hlen <
__offsetof(struct vmbus_chanpkt_rxbuf, cp_rxbuf[count]))) {
if_printf(rxr->hn_ifp, "invalid rxbuf_cnt %d\n", count);
return;
}
/* Each range represents 1 RNDIS pkt that contains 1 Ethernet frame */
for (i = 0; i < count; ++i) {
int ofs, len;
ofs = pkt->cp_rxbuf[i].rb_ofs;
len = pkt->cp_rxbuf[i].rb_len;
if (__predict_false(ofs + len > HN_RXBUF_SIZE)) {
if_printf(rxr->hn_ifp, "%dth RNDIS msg overflow rxbuf, "
"ofs %d, len %d\n", i, ofs, len);
continue;
}
hn_rndis_rxpkt(rxr, rxr->hn_rxbuf + ofs, len);
}
/*
* Ack the consumed RXBUF associated w/ this channel packet,
* so that this RXBUF can be recycled by the hypervisor.
*/
hn_nvs_ack_rxbuf(rxr, chan, pkt->cp_hdr.cph_xactid);
}
static void
hn_nvs_ack_rxbuf(struct hn_rx_ring *rxr, struct vmbus_channel *chan,
uint64_t tid)
{
struct hn_nvs_rndis_ack ack;
int retries, error;
ack.nvs_type = HN_NVS_TYPE_RNDIS_ACK;
ack.nvs_status = HN_NVS_STATUS_OK;
retries = 0;
again:
error = vmbus_chan_send(chan, VMBUS_CHANPKT_TYPE_COMP,
VMBUS_CHANPKT_FLAG_NONE, &ack, sizeof(ack), tid);
if (__predict_false(error == EAGAIN)) {
/*
* NOTE:
* This should _not_ happen in real world, since the
* consumption of the TX bufring from the TX path is
* controlled.
*/
if (rxr->hn_ack_failed == 0)
if_printf(rxr->hn_ifp, "RXBUF ack retry\n");
rxr->hn_ack_failed++;
retries++;
if (retries < 10) {
DELAY(100);
goto again;
}
/* RXBUF leaks! */
if_printf(rxr->hn_ifp, "RXBUF ack failed\n");
}
}
static void
hn_chan_callback(struct vmbus_channel *chan, void *xrxr)
{
struct hn_rx_ring *rxr = xrxr;
struct hn_softc *sc = rxr->hn_ifp->if_softc;
for (;;) {
struct vmbus_chanpkt_hdr *pkt = rxr->hn_pktbuf;
int error, pktlen;
pktlen = rxr->hn_pktbuf_len;
error = vmbus_chan_recv_pkt(chan, pkt, &pktlen);
if (__predict_false(error == ENOBUFS)) {
void *nbuf;
int nlen;
/*
* Expand channel packet buffer.
*
* XXX
* Use M_WAITOK here, since allocation failure
* is fatal.
*/
nlen = rxr->hn_pktbuf_len * 2;
while (nlen < pktlen)
nlen *= 2;
nbuf = malloc(nlen, M_DEVBUF, M_WAITOK);
if_printf(rxr->hn_ifp, "expand pktbuf %d -> %d\n",
rxr->hn_pktbuf_len, nlen);
free(rxr->hn_pktbuf, M_DEVBUF);
rxr->hn_pktbuf = nbuf;
rxr->hn_pktbuf_len = nlen;
/* Retry! */
continue;
} else if (__predict_false(error == EAGAIN)) {
/* No more channel packets; done! */
break;
}
KASSERT(!error, ("vmbus_chan_recv_pkt failed: %d", error));
switch (pkt->cph_type) {
case VMBUS_CHANPKT_TYPE_COMP:
hn_nvs_handle_comp(sc, chan, pkt);
break;
case VMBUS_CHANPKT_TYPE_RXBUF:
hn_nvs_handle_rxbuf(rxr, chan, pkt);
break;
case VMBUS_CHANPKT_TYPE_INBAND:
hn_nvs_handle_notify(sc, pkt);
break;
default:
if_printf(rxr->hn_ifp, "unknown chan pkt %u\n",
pkt->cph_type);
break;
}
}
hn_chan_rollup(rxr, rxr->hn_txr);
}
static void
hn_tx_taskq_create(void *arg __unused)
{
if (vm_guest != VM_GUEST_HV)
return;
if (!hn_share_tx_taskq)
return;
hn_tx_taskq = taskqueue_create("hn_tx", M_WAITOK,
taskqueue_thread_enqueue, &hn_tx_taskq);
if (hn_bind_tx_taskq >= 0) {
int cpu = hn_bind_tx_taskq;
cpuset_t cpu_set;
if (cpu > mp_ncpus - 1)
cpu = mp_ncpus - 1;
CPU_SETOF(cpu, &cpu_set);
taskqueue_start_threads_cpuset(&hn_tx_taskq, 1, PI_NET,
&cpu_set, "hn tx");
} else {
taskqueue_start_threads(&hn_tx_taskq, 1, PI_NET, "hn tx");
}
}
SYSINIT(hn_txtq_create, SI_SUB_DRIVERS, SI_ORDER_SECOND,
hn_tx_taskq_create, NULL);
static void
hn_tx_taskq_destroy(void *arg __unused)
{
if (hn_tx_taskq != NULL)
taskqueue_free(hn_tx_taskq);
}
SYSUNINIT(hn_txtq_destroy, SI_SUB_DRIVERS, SI_ORDER_SECOND,
hn_tx_taskq_destroy, NULL);
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