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b103855e18
freebsd-skq/sys/net/iflib.c
Stephen Hurd b103855e18 Support attaching tx queues to cpus 
This will attempt to use a different thread/core on the same L2
cache when possible, or use the same cpu as the rx thread when not.
If SMP isn't enabled, don't go looking for cores to use. This is mostly
useful when using shared TX/RX queues.

Reviewed by:	sbruno
Sponsored by:	Limelight Networks
Differential Revision:	https://reviews.freebsd.org/D12446
2017-12-20 01:03:34 +00:00

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/*-
* Copyright (c) 2014-2017, Matthew Macy <mmacy@mattmacy.io>
* 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. Neither the name of Matthew Macy nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 COPYRIGHT OWNER 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_inet.h"
#include "opt_inet6.h"
#include "opt_acpi.h"
#include "opt_sched.h"
#include <sys/param.h>
#include <sys/types.h>
#include <sys/bus.h>
#include <sys/eventhandler.h>
#include <sys/sockio.h>
#include <sys/kernel.h>
#include <sys/lock.h>
#include <sys/mutex.h>
#include <sys/module.h>
#include <sys/kobj.h>
#include <sys/rman.h>
#include <sys/sbuf.h>
#include <sys/smp.h>
#include <sys/socket.h>
#include <sys/sysctl.h>
#include <sys/syslog.h>
#include <sys/taskqueue.h>
#include <sys/limits.h>
#include <net/if.h>
#include <net/if_var.h>
#include <net/if_types.h>
#include <net/if_media.h>
#include <net/bpf.h>
#include <net/ethernet.h>
#include <net/mp_ring.h>
#include <net/vnet.h>
#include <netinet/in.h>
#include <netinet/in_pcb.h>
#include <netinet/tcp_lro.h>
#include <netinet/in_systm.h>
#include <netinet/if_ether.h>
#include <netinet/ip.h>
#include <netinet/ip6.h>
#include <netinet/tcp.h>
#include <netinet/ip_var.h>
#include <netinet6/ip6_var.h>
#include <machine/bus.h>
#include <machine/in_cksum.h>
#include <vm/vm.h>
#include <vm/pmap.h>
#include <dev/led/led.h>
#include <dev/pci/pcireg.h>
#include <dev/pci/pcivar.h>
#include <dev/pci/pci_private.h>
#include <net/iflib.h>
#include "ifdi_if.h"
#if defined(__i386__) || defined(__amd64__)
#include <sys/memdesc.h>
#include <machine/bus.h>
#include <machine/md_var.h>
#include <machine/specialreg.h>
#include <x86/include/busdma_impl.h>
#include <x86/iommu/busdma_dmar.h>
#endif
#include <sys/bitstring.h>
/*
* enable accounting of every mbuf as it comes in to and goes out of
* iflib's software descriptor references
*/
#define MEMORY_LOGGING 0
/*
* Enable mbuf vectors for compressing long mbuf chains
*/
/*
* NB:
* - Prefetching in tx cleaning should perhaps be a tunable. The distance ahead
* we prefetch needs to be determined by the time spent in m_free vis a vis
* the cost of a prefetch. This will of course vary based on the workload:
* - NFLX's m_free path is dominated by vm-based M_EXT manipulation which
* is quite expensive, thus suggesting very little prefetch.
* - small packet forwarding which is just returning a single mbuf to
* UMA will typically be very fast vis a vis the cost of a memory
* access.
*/
/*
* File organization:
* - private structures
* - iflib private utility functions
* - ifnet functions
* - vlan registry and other exported functions
* - iflib public core functions
*
*
*/
static MALLOC_DEFINE(M_IFLIB, "iflib", "ifnet library");
struct iflib_txq;
typedef struct iflib_txq *iflib_txq_t;
struct iflib_rxq;
typedef struct iflib_rxq *iflib_rxq_t;
struct iflib_fl;
typedef struct iflib_fl *iflib_fl_t;
struct iflib_ctx;
static void iru_init(if_rxd_update_t iru, iflib_rxq_t rxq, uint8_t flid);
typedef struct iflib_filter_info {
driver_filter_t *ifi_filter;
void *ifi_filter_arg;
struct grouptask *ifi_task;
void *ifi_ctx;
} *iflib_filter_info_t;
struct iflib_ctx {
KOBJ_FIELDS;
/*
* Pointer to hardware driver's softc
*/
void *ifc_softc;
device_t ifc_dev;
if_t ifc_ifp;
cpuset_t ifc_cpus;
if_shared_ctx_t ifc_sctx;
struct if_softc_ctx ifc_softc_ctx;
struct mtx ifc_mtx;
uint16_t ifc_nhwtxqs;
uint16_t ifc_nhwrxqs;
iflib_txq_t ifc_txqs;
iflib_rxq_t ifc_rxqs;
uint32_t ifc_if_flags;
uint32_t ifc_flags;
uint32_t ifc_max_fl_buf_size;
int ifc_in_detach;
int ifc_link_state;
int ifc_link_irq;
int ifc_watchdog_events;
struct cdev *ifc_led_dev;
struct resource *ifc_msix_mem;
struct if_irq ifc_legacy_irq;
struct grouptask ifc_admin_task;
struct grouptask ifc_vflr_task;
struct iflib_filter_info ifc_filter_info;
struct ifmedia ifc_media;
struct sysctl_oid *ifc_sysctl_node;
uint16_t ifc_sysctl_ntxqs;
uint16_t ifc_sysctl_nrxqs;
uint16_t ifc_sysctl_qs_eq_override;
uint16_t ifc_sysctl_rx_budget;
qidx_t ifc_sysctl_ntxds[8];
qidx_t ifc_sysctl_nrxds[8];
struct if_txrx ifc_txrx;
#define isc_txd_encap ifc_txrx.ift_txd_encap
#define isc_txd_flush ifc_txrx.ift_txd_flush
#define isc_txd_credits_update ifc_txrx.ift_txd_credits_update
#define isc_rxd_available ifc_txrx.ift_rxd_available
#define isc_rxd_pkt_get ifc_txrx.ift_rxd_pkt_get
#define isc_rxd_refill ifc_txrx.ift_rxd_refill
#define isc_rxd_flush ifc_txrx.ift_rxd_flush
#define isc_rxd_refill ifc_txrx.ift_rxd_refill
#define isc_rxd_refill ifc_txrx.ift_rxd_refill
#define isc_legacy_intr ifc_txrx.ift_legacy_intr
eventhandler_tag ifc_vlan_attach_event;
eventhandler_tag ifc_vlan_detach_event;
uint8_t ifc_mac[ETHER_ADDR_LEN];
char ifc_mtx_name[16];
};
void *
iflib_get_softc(if_ctx_t ctx)
{
return (ctx->ifc_softc);
}
device_t
iflib_get_dev(if_ctx_t ctx)
{
return (ctx->ifc_dev);
}
if_t
iflib_get_ifp(if_ctx_t ctx)
{
return (ctx->ifc_ifp);
}
struct ifmedia *
iflib_get_media(if_ctx_t ctx)
{
return (&ctx->ifc_media);
}
void
iflib_set_mac(if_ctx_t ctx, uint8_t mac[ETHER_ADDR_LEN])
{
bcopy(mac, ctx->ifc_mac, ETHER_ADDR_LEN);
}
if_softc_ctx_t
iflib_get_softc_ctx(if_ctx_t ctx)
{
return (&ctx->ifc_softc_ctx);
}
if_shared_ctx_t
iflib_get_sctx(if_ctx_t ctx)
{
return (ctx->ifc_sctx);
}
#define IP_ALIGNED(m) ((((uintptr_t)(m)->m_data) & 0x3) == 0x2)
#define CACHE_PTR_INCREMENT (CACHE_LINE_SIZE/sizeof(void*))
#define CACHE_PTR_NEXT(ptr) ((void *)(((uintptr_t)(ptr)+CACHE_LINE_SIZE-1) & (CACHE_LINE_SIZE-1)))
#define LINK_ACTIVE(ctx) ((ctx)->ifc_link_state == LINK_STATE_UP)
#define CTX_IS_VF(ctx) ((ctx)->ifc_sctx->isc_flags & IFLIB_IS_VF)
#define RX_SW_DESC_MAP_CREATED (1 << 0)
#define TX_SW_DESC_MAP_CREATED (1 << 1)
#define RX_SW_DESC_INUSE (1 << 3)
#define TX_SW_DESC_MAPPED (1 << 4)
#define M_TOOBIG M_PROTO1
typedef struct iflib_sw_rx_desc_array {
bus_dmamap_t *ifsd_map; /* bus_dma maps for packet */
struct mbuf **ifsd_m; /* pkthdr mbufs */
caddr_t *ifsd_cl; /* direct cluster pointer for rx */
uint8_t *ifsd_flags;
} iflib_rxsd_array_t;
typedef struct iflib_sw_tx_desc_array {
bus_dmamap_t *ifsd_map; /* bus_dma maps for packet */
struct mbuf **ifsd_m; /* pkthdr mbufs */
uint8_t *ifsd_flags;
} if_txsd_vec_t;
/* magic number that should be high enough for any hardware */
#define IFLIB_MAX_TX_SEGS 128
/* bnxt supports 64 with hardware LRO enabled */
#define IFLIB_MAX_RX_SEGS 64
#define IFLIB_RX_COPY_THRESH 128
#define IFLIB_MAX_RX_REFRESH 32
/* The minimum descriptors per second before we start coalescing */
#define IFLIB_MIN_DESC_SEC 16384
#define IFLIB_DEFAULT_TX_UPDATE_FREQ 16
#define IFLIB_QUEUE_IDLE 0
#define IFLIB_QUEUE_HUNG 1
#define IFLIB_QUEUE_WORKING 2
/* maximum number of txqs that can share an rx interrupt */
#define IFLIB_MAX_TX_SHARED_INTR 4
/* this should really scale with ring size - this is a fairly arbitrary value */
#define TX_BATCH_SIZE 32
#define IFLIB_RESTART_BUDGET 8
#define IFC_LEGACY 0x001
#define IFC_QFLUSH 0x002
#define IFC_MULTISEG 0x004
#define IFC_DMAR 0x008
#define IFC_SC_ALLOCATED 0x010
#define IFC_INIT_DONE 0x020
#define IFC_PREFETCH 0x040
#define IFC_DO_RESET 0x080
#define IFC_CHECK_HUNG 0x100
#define CSUM_OFFLOAD (CSUM_IP_TSO|CSUM_IP6_TSO|CSUM_IP| \
CSUM_IP_UDP|CSUM_IP_TCP|CSUM_IP_SCTP| \
CSUM_IP6_UDP|CSUM_IP6_TCP|CSUM_IP6_SCTP)
struct iflib_txq {
qidx_t ift_in_use;
qidx_t ift_cidx;
qidx_t ift_cidx_processed;
qidx_t ift_pidx;
uint8_t ift_gen;
uint8_t ift_br_offset;
uint16_t ift_npending;
uint16_t ift_db_pending;
uint16_t ift_rs_pending;
/* implicit pad */
uint8_t ift_txd_size[8];
uint64_t ift_processed;
uint64_t ift_cleaned;
uint64_t ift_cleaned_prev;
#if MEMORY_LOGGING
uint64_t ift_enqueued;
uint64_t ift_dequeued;
#endif
uint64_t ift_no_tx_dma_setup;
uint64_t ift_no_desc_avail;
uint64_t ift_mbuf_defrag_failed;
uint64_t ift_mbuf_defrag;
uint64_t ift_map_failed;
uint64_t ift_txd_encap_efbig;
uint64_t ift_pullups;
struct mtx ift_mtx;
struct mtx ift_db_mtx;
/* constant values */
if_ctx_t ift_ctx;
struct ifmp_ring *ift_br;
struct grouptask ift_task;
qidx_t ift_size;
uint16_t ift_id;
struct callout ift_timer;
if_txsd_vec_t ift_sds;
uint8_t ift_qstatus;
uint8_t ift_closed;
uint8_t ift_update_freq;
struct iflib_filter_info ift_filter_info;
bus_dma_tag_t ift_desc_tag;
bus_dma_tag_t ift_tso_desc_tag;
iflib_dma_info_t ift_ifdi;
#define MTX_NAME_LEN 16
char ift_mtx_name[MTX_NAME_LEN];
char ift_db_mtx_name[MTX_NAME_LEN];
bus_dma_segment_t ift_segs[IFLIB_MAX_TX_SEGS] __aligned(CACHE_LINE_SIZE);
#ifdef IFLIB_DIAGNOSTICS
uint64_t ift_cpu_exec_count[256];
#endif
} __aligned(CACHE_LINE_SIZE);
struct iflib_fl {
qidx_t ifl_cidx;
qidx_t ifl_pidx;
qidx_t ifl_credits;
uint8_t ifl_gen;
uint8_t ifl_rxd_size;
#if MEMORY_LOGGING
uint64_t ifl_m_enqueued;
uint64_t ifl_m_dequeued;
uint64_t ifl_cl_enqueued;
uint64_t ifl_cl_dequeued;
#endif
/* implicit pad */
bitstr_t *ifl_rx_bitmap;
qidx_t ifl_fragidx;
/* constant */
qidx_t ifl_size;
uint16_t ifl_buf_size;
uint16_t ifl_cltype;
uma_zone_t ifl_zone;
iflib_rxsd_array_t ifl_sds;
iflib_rxq_t ifl_rxq;
uint8_t ifl_id;
bus_dma_tag_t ifl_desc_tag;
iflib_dma_info_t ifl_ifdi;
uint64_t ifl_bus_addrs[IFLIB_MAX_RX_REFRESH] __aligned(CACHE_LINE_SIZE);
caddr_t ifl_vm_addrs[IFLIB_MAX_RX_REFRESH];
qidx_t ifl_rxd_idxs[IFLIB_MAX_RX_REFRESH];
} __aligned(CACHE_LINE_SIZE);
static inline qidx_t
get_inuse(int size, qidx_t cidx, qidx_t pidx, uint8_t gen)
{
qidx_t used;
if (pidx > cidx)
used = pidx - cidx;
else if (pidx < cidx)
used = size - cidx + pidx;
else if (gen == 0 && pidx == cidx)
used = 0;
else if (gen == 1 && pidx == cidx)
used = size;
else
panic("bad state");
return (used);
}
#define TXQ_AVAIL(txq) (txq->ift_size - get_inuse(txq->ift_size, txq->ift_cidx, txq->ift_pidx, txq->ift_gen))
#define IDXDIFF(head, tail, wrap) \
((head) >= (tail) ? (head) - (tail) : (wrap) - (tail) + (head))
struct iflib_rxq {
/* If there is a separate completion queue -
* these are the cq cidx and pidx. Otherwise
* these are unused.
*/
qidx_t ifr_size;
qidx_t ifr_cq_cidx;
qidx_t ifr_cq_pidx;
uint8_t ifr_cq_gen;
uint8_t ifr_fl_offset;
if_ctx_t ifr_ctx;
iflib_fl_t ifr_fl;
uint64_t ifr_rx_irq;
uint16_t ifr_id;
uint8_t ifr_lro_enabled;
uint8_t ifr_nfl;
uint8_t ifr_ntxqirq;
uint8_t ifr_txqid[IFLIB_MAX_TX_SHARED_INTR];
struct lro_ctrl ifr_lc;
struct grouptask ifr_task;
struct iflib_filter_info ifr_filter_info;
iflib_dma_info_t ifr_ifdi;
/* dynamically allocate if any drivers need a value substantially larger than this */
struct if_rxd_frag ifr_frags[IFLIB_MAX_RX_SEGS] __aligned(CACHE_LINE_SIZE);
#ifdef IFLIB_DIAGNOSTICS
uint64_t ifr_cpu_exec_count[256];
#endif
} __aligned(CACHE_LINE_SIZE);
typedef struct if_rxsd {
caddr_t *ifsd_cl;
struct mbuf **ifsd_m;
iflib_fl_t ifsd_fl;
qidx_t ifsd_cidx;
} *if_rxsd_t;
/* multiple of word size */
#ifdef __LP64__
#define PKT_INFO_SIZE 6
#define RXD_INFO_SIZE 5
#define PKT_TYPE uint64_t
#else
#define PKT_INFO_SIZE 11
#define RXD_INFO_SIZE 8
#define PKT_TYPE uint32_t
#endif
#define PKT_LOOP_BOUND ((PKT_INFO_SIZE/3)*3)
#define RXD_LOOP_BOUND ((RXD_INFO_SIZE/4)*4)
typedef struct if_pkt_info_pad {
PKT_TYPE pkt_val[PKT_INFO_SIZE];
} *if_pkt_info_pad_t;
typedef struct if_rxd_info_pad {
PKT_TYPE rxd_val[RXD_INFO_SIZE];
} *if_rxd_info_pad_t;
CTASSERT(sizeof(struct if_pkt_info_pad) == sizeof(struct if_pkt_info));
CTASSERT(sizeof(struct if_rxd_info_pad) == sizeof(struct if_rxd_info));
static inline void
pkt_info_zero(if_pkt_info_t pi)
{
if_pkt_info_pad_t pi_pad;
pi_pad = (if_pkt_info_pad_t)pi;
pi_pad->pkt_val[0] = 0; pi_pad->pkt_val[1] = 0; pi_pad->pkt_val[2] = 0;
pi_pad->pkt_val[3] = 0; pi_pad->pkt_val[4] = 0; pi_pad->pkt_val[5] = 0;
#ifndef __LP64__
pi_pad->pkt_val[6] = 0; pi_pad->pkt_val[7] = 0; pi_pad->pkt_val[8] = 0;
pi_pad->pkt_val[9] = 0; pi_pad->pkt_val[10] = 0;
#endif
}
static inline void
rxd_info_zero(if_rxd_info_t ri)
{
if_rxd_info_pad_t ri_pad;
int i;
ri_pad = (if_rxd_info_pad_t)ri;
for (i = 0; i < RXD_LOOP_BOUND; i += 4) {
ri_pad->rxd_val[i] = 0;
ri_pad->rxd_val[i+1] = 0;
ri_pad->rxd_val[i+2] = 0;
ri_pad->rxd_val[i+3] = 0;
}
#ifdef __LP64__
ri_pad->rxd_val[RXD_INFO_SIZE-1] = 0;
#endif
}
/*
* Only allow a single packet to take up most 1/nth of the tx ring
*/
#define MAX_SINGLE_PACKET_FRACTION 12
#define IF_BAD_DMA (bus_addr_t)-1
#define CTX_ACTIVE(ctx) ((if_getdrvflags((ctx)->ifc_ifp) & IFF_DRV_RUNNING))
#define CTX_LOCK_INIT(_sc, _name) mtx_init(&(_sc)->ifc_mtx, _name, "iflib ctx lock", MTX_DEF)
#define CTX_LOCK(ctx) mtx_lock(&(ctx)->ifc_mtx)
#define CTX_UNLOCK(ctx) mtx_unlock(&(ctx)->ifc_mtx)
#define CTX_LOCK_DESTROY(ctx) mtx_destroy(&(ctx)->ifc_mtx)
#define CALLOUT_LOCK(txq) mtx_lock(&txq->ift_mtx)
#define CALLOUT_UNLOCK(txq) mtx_unlock(&txq->ift_mtx)
/* Our boot-time initialization hook */
static int iflib_module_event_handler(module_t, int, void *);
static moduledata_t iflib_moduledata = {
"iflib",
iflib_module_event_handler,
NULL
};
DECLARE_MODULE(iflib, iflib_moduledata, SI_SUB_INIT_IF, SI_ORDER_ANY);
MODULE_VERSION(iflib, 1);
MODULE_DEPEND(iflib, pci, 1, 1, 1);
MODULE_DEPEND(iflib, ether, 1, 1, 1);
TASKQGROUP_DEFINE(if_io_tqg, mp_ncpus, 1);
TASKQGROUP_DEFINE(if_config_tqg, 1, 1);
#ifndef IFLIB_DEBUG_COUNTERS
#ifdef INVARIANTS
#define IFLIB_DEBUG_COUNTERS 1
#else
#define IFLIB_DEBUG_COUNTERS 0
#endif /* !INVARIANTS */
#endif
static SYSCTL_NODE(_net, OID_AUTO, iflib, CTLFLAG_RD, 0,
"iflib driver parameters");
/*
* XXX need to ensure that this can't accidentally cause the head to be moved backwards
*/
static int iflib_min_tx_latency = 0;
SYSCTL_INT(_net_iflib, OID_AUTO, min_tx_latency, CTLFLAG_RW,
&iflib_min_tx_latency, 0, "minimize transmit latency at the possible expense of throughput");
static int iflib_no_tx_batch = 0;
SYSCTL_INT(_net_iflib, OID_AUTO, no_tx_batch, CTLFLAG_RW,
&iflib_no_tx_batch, 0, "minimize transmit latency at the possible expense of throughput");
#if IFLIB_DEBUG_COUNTERS
static int iflib_tx_seen;
static int iflib_tx_sent;
static int iflib_tx_encap;
static int iflib_rx_allocs;
static int iflib_fl_refills;
static int iflib_fl_refills_large;
static int iflib_tx_frees;
SYSCTL_INT(_net_iflib, OID_AUTO, tx_seen, CTLFLAG_RD,
&iflib_tx_seen, 0, "# tx mbufs seen");
SYSCTL_INT(_net_iflib, OID_AUTO, tx_sent, CTLFLAG_RD,
&iflib_tx_sent, 0, "# tx mbufs sent");
SYSCTL_INT(_net_iflib, OID_AUTO, tx_encap, CTLFLAG_RD,
&iflib_tx_encap, 0, "# tx mbufs encapped");
SYSCTL_INT(_net_iflib, OID_AUTO, tx_frees, CTLFLAG_RD,
&iflib_tx_frees, 0, "# tx frees");
SYSCTL_INT(_net_iflib, OID_AUTO, rx_allocs, CTLFLAG_RD,
&iflib_rx_allocs, 0, "# rx allocations");
SYSCTL_INT(_net_iflib, OID_AUTO, fl_refills, CTLFLAG_RD,
&iflib_fl_refills, 0, "# refills");
SYSCTL_INT(_net_iflib, OID_AUTO, fl_refills_large, CTLFLAG_RD,
&iflib_fl_refills_large, 0, "# large refills");
static int iflib_txq_drain_flushing;
static int iflib_txq_drain_oactive;
static int iflib_txq_drain_notready;
static int iflib_txq_drain_encapfail;
SYSCTL_INT(_net_iflib, OID_AUTO, txq_drain_flushing, CTLFLAG_RD,
&iflib_txq_drain_flushing, 0, "# drain flushes");
SYSCTL_INT(_net_iflib, OID_AUTO, txq_drain_oactive, CTLFLAG_RD,
&iflib_txq_drain_oactive, 0, "# drain oactives");
SYSCTL_INT(_net_iflib, OID_AUTO, txq_drain_notready, CTLFLAG_RD,
&iflib_txq_drain_notready, 0, "# drain notready");
SYSCTL_INT(_net_iflib, OID_AUTO, txq_drain_encapfail, CTLFLAG_RD,
&iflib_txq_drain_encapfail, 0, "# drain encap fails");
static int iflib_encap_load_mbuf_fail;
static int iflib_encap_pad_mbuf_fail;
static int iflib_encap_txq_avail_fail;
static int iflib_encap_txd_encap_fail;
SYSCTL_INT(_net_iflib, OID_AUTO, encap_load_mbuf_fail, CTLFLAG_RD,
&iflib_encap_load_mbuf_fail, 0, "# busdma load failures");
SYSCTL_INT(_net_iflib, OID_AUTO, encap_pad_mbuf_fail, CTLFLAG_RD,
&iflib_encap_pad_mbuf_fail, 0, "# runt frame pad failures");
SYSCTL_INT(_net_iflib, OID_AUTO, encap_txq_avail_fail, CTLFLAG_RD,
&iflib_encap_txq_avail_fail, 0, "# txq avail failures");
SYSCTL_INT(_net_iflib, OID_AUTO, encap_txd_encap_fail, CTLFLAG_RD,
&iflib_encap_txd_encap_fail, 0, "# driver encap failures");
static int iflib_task_fn_rxs;
static int iflib_rx_intr_enables;
static int iflib_fast_intrs;
static int iflib_intr_link;
static int iflib_intr_msix;
static int iflib_rx_unavail;
static int iflib_rx_ctx_inactive;
static int iflib_rx_zero_len;
static int iflib_rx_if_input;
static int iflib_rx_mbuf_null;
static int iflib_rxd_flush;
static int iflib_verbose_debug;
SYSCTL_INT(_net_iflib, OID_AUTO, intr_link, CTLFLAG_RD,
&iflib_intr_link, 0, "# intr link calls");
SYSCTL_INT(_net_iflib, OID_AUTO, intr_msix, CTLFLAG_RD,
&iflib_intr_msix, 0, "# intr msix calls");
SYSCTL_INT(_net_iflib, OID_AUTO, task_fn_rx, CTLFLAG_RD,
&iflib_task_fn_rxs, 0, "# task_fn_rx calls");
SYSCTL_INT(_net_iflib, OID_AUTO, rx_intr_enables, CTLFLAG_RD,
&iflib_rx_intr_enables, 0, "# rx intr enables");
SYSCTL_INT(_net_iflib, OID_AUTO, fast_intrs, CTLFLAG_RD,
&iflib_fast_intrs, 0, "# fast_intr calls");
SYSCTL_INT(_net_iflib, OID_AUTO, rx_unavail, CTLFLAG_RD,
&iflib_rx_unavail, 0, "# times rxeof called with no available data");
SYSCTL_INT(_net_iflib, OID_AUTO, rx_ctx_inactive, CTLFLAG_RD,
&iflib_rx_ctx_inactive, 0, "# times rxeof called with inactive context");
SYSCTL_INT(_net_iflib, OID_AUTO, rx_zero_len, CTLFLAG_RD,
&iflib_rx_zero_len, 0, "# times rxeof saw zero len mbuf");
SYSCTL_INT(_net_iflib, OID_AUTO, rx_if_input, CTLFLAG_RD,
&iflib_rx_if_input, 0, "# times rxeof called if_input");
SYSCTL_INT(_net_iflib, OID_AUTO, rx_mbuf_null, CTLFLAG_RD,
&iflib_rx_mbuf_null, 0, "# times rxeof got null mbuf");
SYSCTL_INT(_net_iflib, OID_AUTO, rxd_flush, CTLFLAG_RD,
&iflib_rxd_flush, 0, "# times rxd_flush called");
SYSCTL_INT(_net_iflib, OID_AUTO, verbose_debug, CTLFLAG_RW,
&iflib_verbose_debug, 0, "enable verbose debugging");
#define DBG_COUNTER_INC(name) atomic_add_int(&(iflib_ ## name), 1)
static void
iflib_debug_reset(void)
{
iflib_tx_seen = iflib_tx_sent = iflib_tx_encap = iflib_rx_allocs =
iflib_fl_refills = iflib_fl_refills_large = iflib_tx_frees =
iflib_txq_drain_flushing = iflib_txq_drain_oactive =
iflib_txq_drain_notready = iflib_txq_drain_encapfail =
iflib_encap_load_mbuf_fail = iflib_encap_pad_mbuf_fail =
iflib_encap_txq_avail_fail = iflib_encap_txd_encap_fail =
iflib_task_fn_rxs = iflib_rx_intr_enables = iflib_fast_intrs =
iflib_intr_link = iflib_intr_msix = iflib_rx_unavail =
iflib_rx_ctx_inactive = iflib_rx_zero_len = iflib_rx_if_input =
iflib_rx_mbuf_null = iflib_rxd_flush = 0;
}
#else
#define DBG_COUNTER_INC(name)
static void iflib_debug_reset(void) {}
#endif
#define IFLIB_DEBUG 0
static void iflib_tx_structures_free(if_ctx_t ctx);
static void iflib_rx_structures_free(if_ctx_t ctx);
static int iflib_queues_alloc(if_ctx_t ctx);
static int iflib_tx_credits_update(if_ctx_t ctx, iflib_txq_t txq);
static int iflib_rxd_avail(if_ctx_t ctx, iflib_rxq_t rxq, qidx_t cidx, qidx_t budget);
static int iflib_qset_structures_setup(if_ctx_t ctx);
static int iflib_msix_init(if_ctx_t ctx);
static int iflib_legacy_setup(if_ctx_t ctx, driver_filter_t filter, void *filterarg, int *rid, char *str);
static void iflib_txq_check_drain(iflib_txq_t txq, int budget);
static uint32_t iflib_txq_can_drain(struct ifmp_ring *);
static int iflib_register(if_ctx_t);
static void iflib_init_locked(if_ctx_t ctx);
static void iflib_add_device_sysctl_pre(if_ctx_t ctx);
static void iflib_add_device_sysctl_post(if_ctx_t ctx);
static void iflib_ifmp_purge(iflib_txq_t txq);
static void _iflib_pre_assert(if_softc_ctx_t scctx);
static void iflib_stop(if_ctx_t ctx);
static void iflib_if_init_locked(if_ctx_t ctx);
#ifndef __NO_STRICT_ALIGNMENT
static struct mbuf * iflib_fixup_rx(struct mbuf *m);
#endif
#ifdef DEV_NETMAP
#include <sys/selinfo.h>
#include <net/netmap.h>
#include <dev/netmap/netmap_kern.h>
MODULE_DEPEND(iflib, netmap, 1, 1, 1);
static int netmap_fl_refill(iflib_rxq_t rxq, struct netmap_kring *kring, uint32_t nm_i, bool init);
/*
* device-specific sysctl variables:
*
* iflib_crcstrip: 0: keep CRC in rx frames (default), 1: strip it.
* During regular operations the CRC is stripped, but on some
* hardware reception of frames not multiple of 64 is slower,
* so using crcstrip=0 helps in benchmarks.
*
* iflib_rx_miss, iflib_rx_miss_bufs:
* count packets that might be missed due to lost interrupts.
*/
SYSCTL_DECL(_dev_netmap);
/*
* The xl driver by default strips CRCs and we do not override it.
*/
int iflib_crcstrip = 1;
SYSCTL_INT(_dev_netmap, OID_AUTO, iflib_crcstrip,
CTLFLAG_RW, &iflib_crcstrip, 1, "strip CRC on rx frames");
int iflib_rx_miss, iflib_rx_miss_bufs;
SYSCTL_INT(_dev_netmap, OID_AUTO, iflib_rx_miss,
CTLFLAG_RW, &iflib_rx_miss, 0, "potentially missed rx intr");
SYSCTL_INT(_dev_netmap, OID_AUTO, iflib_rx_miss_bufs,
CTLFLAG_RW, &iflib_rx_miss_bufs, 0, "potentially missed rx intr bufs");
/*
* Register/unregister. We are already under netmap lock.
* Only called on the first register or the last unregister.
*/
static int
iflib_netmap_register(struct netmap_adapter *na, int onoff)
{
struct ifnet *ifp = na->ifp;
if_ctx_t ctx = ifp->if_softc;
int status;
CTX_LOCK(ctx);
IFDI_INTR_DISABLE(ctx);
/* Tell the stack that the interface is no longer active */
ifp->if_drv_flags &= ~(IFF_DRV_RUNNING | IFF_DRV_OACTIVE);
if (!CTX_IS_VF(ctx))
IFDI_CRCSTRIP_SET(ctx, onoff, iflib_crcstrip);
/* enable or disable flags and callbacks in na and ifp */
if (onoff) {
nm_set_native_flags(na);
} else {
nm_clear_native_flags(na);
}
iflib_stop(ctx);
iflib_init_locked(ctx);
IFDI_CRCSTRIP_SET(ctx, onoff, iflib_crcstrip); // XXX why twice ?
status = ifp->if_drv_flags & IFF_DRV_RUNNING ? 0 : 1;
if (status)
nm_clear_native_flags(na);
CTX_UNLOCK(ctx);
return (status);
}
static int
netmap_fl_refill(iflib_rxq_t rxq, struct netmap_kring *kring, uint32_t nm_i, bool init)
{
struct netmap_adapter *na = kring->na;
u_int const lim = kring->nkr_num_slots - 1;
u_int head = kring->rhead;
struct netmap_ring *ring = kring->ring;
bus_dmamap_t *map;
struct if_rxd_update iru;
if_ctx_t ctx = rxq->ifr_ctx;
iflib_fl_t fl = &rxq->ifr_fl[0];
uint32_t refill_pidx, nic_i;
if (nm_i == head && __predict_true(!init))
return 0;
iru_init(&iru, rxq, 0 /* flid */);
map = fl->ifl_sds.ifsd_map;
refill_pidx = netmap_idx_k2n(kring, nm_i);
/*
* IMPORTANT: we must leave one free slot in the ring,
* so move head back by one unit
*/
head = nm_prev(head, lim);
while (nm_i != head) {
for (int tmp_pidx = 0; tmp_pidx < IFLIB_MAX_RX_REFRESH && nm_i != head; tmp_pidx++) {
struct netmap_slot *slot = &ring->slot[nm_i];
void *addr = PNMB(na, slot, &fl->ifl_bus_addrs[tmp_pidx]);
uint32_t nic_i_dma = refill_pidx;
nic_i = netmap_idx_k2n(kring, nm_i);
MPASS(tmp_pidx < IFLIB_MAX_RX_REFRESH);
if (addr == NETMAP_BUF_BASE(na)) /* bad buf */
return netmap_ring_reinit(kring);
fl->ifl_vm_addrs[tmp_pidx] = addr;
if (__predict_false(init) && map) {
netmap_load_map(na, fl->ifl_ifdi->idi_tag, map[nic_i], addr);
} else if (map && (slot->flags & NS_BUF_CHANGED)) {
/* buffer has changed, reload map */
netmap_reload_map(na, fl->ifl_ifdi->idi_tag, map[nic_i], addr);
}
slot->flags &= ~NS_BUF_CHANGED;
nm_i = nm_next(nm_i, lim);
fl->ifl_rxd_idxs[tmp_pidx] = nic_i = nm_next(nic_i, lim);
if (nm_i != head && tmp_pidx < IFLIB_MAX_RX_REFRESH-1)
continue;
iru.iru_pidx = refill_pidx;
iru.iru_count = tmp_pidx+1;
ctx->isc_rxd_refill(ctx->ifc_softc, &iru);
refill_pidx = nic_i;
if (map == NULL)
continue;
for (int n = 0; n < iru.iru_count; n++) {
bus_dmamap_sync(fl->ifl_ifdi->idi_tag, map[nic_i_dma],
BUS_DMASYNC_PREREAD);
/* XXX - change this to not use the netmap func*/
nic_i_dma = nm_next(nic_i_dma, lim);
}
}
}
kring->nr_hwcur = head;
if (map)
bus_dmamap_sync(fl->ifl_ifdi->idi_tag, fl->ifl_ifdi->idi_map,
BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);
ctx->isc_rxd_flush(ctx->ifc_softc, rxq->ifr_id, fl->ifl_id, nic_i);
return (0);
}
/*
* Reconcile kernel and user view of the transmit ring.
*
* All information is in the kring.
* Userspace wants to send packets up to the one before kring->rhead,
* kernel knows kring->nr_hwcur is the first unsent packet.
*
* Here we push packets out (as many as possible), and possibly
* reclaim buffers from previously completed transmission.
*
* The caller (netmap) guarantees that there is only one instance
* running at any time. Any interference with other driver
* methods should be handled by the individual drivers.
*/
static int
iflib_netmap_txsync(struct netmap_kring *kring, int flags)
{
struct netmap_adapter *na = kring->na;
struct ifnet *ifp = na->ifp;
struct netmap_ring *ring = kring->ring;
u_int nm_i; /* index into the netmap ring */
u_int nic_i; /* index into the NIC ring */
u_int n;
u_int const lim = kring->nkr_num_slots - 1;
u_int const head = kring->rhead;
struct if_pkt_info pi;
/*
* interrupts on every tx packet are expensive so request
* them every half ring, or where NS_REPORT is set
*/
u_int report_frequency = kring->nkr_num_slots >> 1;
/* device-specific */
if_ctx_t ctx = ifp->if_softc;
iflib_txq_t txq = &ctx->ifc_txqs[kring->ring_id];
if (txq->ift_sds.ifsd_map)
bus_dmamap_sync(txq->ift_desc_tag, txq->ift_ifdi->idi_map,
BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE);
/*
* First part: process new packets to send.
* nm_i is the current index in the netmap ring,
* nic_i is the corresponding index in the NIC ring.
*
* If we have packets to send (nm_i != head)
* iterate over the netmap ring, fetch length and update
* the corresponding slot in the NIC ring. Some drivers also
* need to update the buffer's physical address in the NIC slot
* even NS_BUF_CHANGED is not set (PNMB computes the addresses).
*
* The netmap_reload_map() calls is especially expensive,
* even when (as in this case) the tag is 0, so do only
* when the buffer has actually changed.
*
* If possible do not set the report/intr bit on all slots,
* but only a few times per ring or when NS_REPORT is set.
*
* Finally, on 10G and faster drivers, it might be useful
* to prefetch the next slot and txr entry.
*/
nm_i = netmap_idx_n2k(kring, kring->nr_hwcur);
pkt_info_zero(&pi);
pi.ipi_segs = txq->ift_segs;
pi.ipi_qsidx = kring->ring_id;
if (nm_i != head) { /* we have new packets to send */
nic_i = netmap_idx_k2n(kring, nm_i);
__builtin_prefetch(&ring->slot[nm_i]);
__builtin_prefetch(&txq->ift_sds.ifsd_m[nic_i]);
if (txq->ift_sds.ifsd_map)
__builtin_prefetch(&txq->ift_sds.ifsd_map[nic_i]);
for (n = 0; nm_i != head; n++) {
struct netmap_slot *slot = &ring->slot[nm_i];
u_int len = slot->len;
uint64_t paddr;
void *addr = PNMB(na, slot, &paddr);
int flags = (slot->flags & NS_REPORT ||
nic_i == 0 || nic_i == report_frequency) ?
IPI_TX_INTR : 0;
/* device-specific */
pi.ipi_len = len;
pi.ipi_segs[0].ds_addr = paddr;
pi.ipi_segs[0].ds_len = len;
pi.ipi_nsegs = 1;
pi.ipi_ndescs = 0;
pi.ipi_pidx = nic_i;
pi.ipi_flags = flags;
/* Fill the slot in the NIC ring. */
ctx->isc_txd_encap(ctx->ifc_softc, &pi);
/* prefetch for next round */
__builtin_prefetch(&ring->slot[nm_i + 1]);
__builtin_prefetch(&txq->ift_sds.ifsd_m[nic_i + 1]);
if (txq->ift_sds.ifsd_map) {
__builtin_prefetch(&txq->ift_sds.ifsd_map[nic_i + 1]);
NM_CHECK_ADDR_LEN(na, addr, len);
if (slot->flags & NS_BUF_CHANGED) {
/* buffer has changed, reload map */
netmap_reload_map(na, txq->ift_desc_tag, txq->ift_sds.ifsd_map[nic_i], addr);
}
/* make sure changes to the buffer are synced */
bus_dmamap_sync(txq->ift_ifdi->idi_tag, txq->ift_sds.ifsd_map[nic_i],
BUS_DMASYNC_PREWRITE);
}
slot->flags &= ~(NS_REPORT | NS_BUF_CHANGED);
nm_i = nm_next(nm_i, lim);
nic_i = nm_next(nic_i, lim);
}
kring->nr_hwcur = head;
/* synchronize the NIC ring */
if (txq->ift_sds.ifsd_map)
bus_dmamap_sync(txq->ift_desc_tag, txq->ift_ifdi->idi_map,
BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);
/* (re)start the tx unit up to slot nic_i (excluded) */
ctx->isc_txd_flush(ctx->ifc_softc, txq->ift_id, nic_i);
}
/*
* Second part: reclaim buffers for completed transmissions.
*/
if (iflib_tx_credits_update(ctx, txq)) {
/* some tx completed, increment avail */
nic_i = txq->ift_cidx_processed;
kring->nr_hwtail = nm_prev(netmap_idx_n2k(kring, nic_i), lim);
}
return (0);
}
/*
* Reconcile kernel and user view of the receive ring.
* Same as for the txsync, this routine must be efficient.
* The caller guarantees a single invocations, but races against
* the rest of the driver should be handled here.
*
* On call, kring->rhead is the first packet that userspace wants
* to keep, and kring->rcur is the wakeup point.
* The kernel has previously reported packets up to kring->rtail.
*
* If (flags & NAF_FORCE_READ) also check for incoming packets irrespective
* of whether or not we received an interrupt.
*/
static int
iflib_netmap_rxsync(struct netmap_kring *kring, int flags)
{
struct netmap_adapter *na = kring->na;
struct netmap_ring *ring = kring->ring;
uint32_t nm_i; /* index into the netmap ring */
uint32_t nic_i; /* index into the NIC ring */
u_int i, n;
u_int const lim = kring->nkr_num_slots - 1;
u_int const head = netmap_idx_n2k(kring, kring->rhead);
int force_update = (flags & NAF_FORCE_READ) || kring->nr_kflags & NKR_PENDINTR;
struct if_rxd_info ri;
struct ifnet *ifp = na->ifp;
if_ctx_t ctx = ifp->if_softc;
iflib_rxq_t rxq = &ctx->ifc_rxqs[kring->ring_id];
iflib_fl_t fl = rxq->ifr_fl;
if (head > lim)
return netmap_ring_reinit(kring);
/* XXX check sync modes */
for (i = 0, fl = rxq->ifr_fl; i < rxq->ifr_nfl; i++, fl++) {
if (fl->ifl_sds.ifsd_map == NULL)
continue;
bus_dmamap_sync(rxq->ifr_fl[i].ifl_desc_tag, fl->ifl_ifdi->idi_map,
BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE);
}
/*
* First part: import newly received packets.
*
* nm_i is the index of the next free slot in the netmap ring,
* nic_i is the index of the next received packet in the NIC ring,
* and they may differ in case if_init() has been called while
* in netmap mode. For the receive ring we have
*
* nic_i = rxr->next_check;
* nm_i = kring->nr_hwtail (previous)
* and
* nm_i == (nic_i + kring->nkr_hwofs) % ring_size
*
* rxr->next_check is set to 0 on a ring reinit
*/
if (netmap_no_pendintr || force_update) {
int crclen = iflib_crcstrip ? 0 : 4;
int error, avail;
uint16_t slot_flags = kring->nkr_slot_flags;
for (i = 0; i < rxq->ifr_nfl; i++) {
fl = &rxq->ifr_fl[i];
nic_i = fl->ifl_cidx;
nm_i = netmap_idx_n2k(kring, nic_i);
avail = iflib_rxd_avail(ctx, rxq, nic_i, USHRT_MAX);
for (n = 0; avail > 0; n++, avail--) {
rxd_info_zero(&ri);
ri.iri_frags = rxq->ifr_frags;
ri.iri_qsidx = kring->ring_id;
ri.iri_ifp = ctx->ifc_ifp;
ri.iri_cidx = nic_i;
error = ctx->isc_rxd_pkt_get(ctx->ifc_softc, &ri);
ring->slot[nm_i].len = error ? 0 : ri.iri_len - crclen;
ring->slot[nm_i].flags = slot_flags;
if (fl->ifl_sds.ifsd_map)
bus_dmamap_sync(fl->ifl_ifdi->idi_tag,
fl->ifl_sds.ifsd_map[nic_i], BUS_DMASYNC_POSTREAD);
nm_i = nm_next(nm_i, lim);
nic_i = nm_next(nic_i, lim);
}
if (n) { /* update the state variables */
if (netmap_no_pendintr && !force_update) {
/* diagnostics */
iflib_rx_miss ++;
iflib_rx_miss_bufs += n;
}
fl->ifl_cidx = nic_i;
kring->nr_hwtail = netmap_idx_k2n(kring, nm_i);
}
kring->nr_kflags &= ~NKR_PENDINTR;
}
}
/*
* Second part: skip past packets that userspace has released.
* (kring->nr_hwcur to head excluded),
* and make the buffers available for reception.
* As usual nm_i is the index in the netmap ring,
* nic_i is the index in the NIC ring, and
* nm_i == (nic_i + kring->nkr_hwofs) % ring_size
*/
/* XXX not sure how this will work with multiple free lists */
nm_i = netmap_idx_n2k(kring, kring->nr_hwcur);
return (netmap_fl_refill(rxq, kring, nm_i, false));
}
static void
iflib_netmap_intr(struct netmap_adapter *na, int onoff)
{
struct ifnet *ifp = na->ifp;
if_ctx_t ctx = ifp->if_softc;
CTX_LOCK(ctx);
if (onoff) {
IFDI_INTR_ENABLE(ctx);
} else {
IFDI_INTR_DISABLE(ctx);
}
CTX_UNLOCK(ctx);
}
static int
iflib_netmap_attach(if_ctx_t ctx)
{
struct netmap_adapter na;
if_softc_ctx_t scctx = &ctx->ifc_softc_ctx;
bzero(&na, sizeof(na));
na.ifp = ctx->ifc_ifp;
na.na_flags = NAF_BDG_MAYSLEEP;
MPASS(ctx->ifc_softc_ctx.isc_ntxqsets);
MPASS(ctx->ifc_softc_ctx.isc_nrxqsets);
na.num_tx_desc = scctx->isc_ntxd[0];
na.num_rx_desc = scctx->isc_nrxd[0];
na.nm_txsync = iflib_netmap_txsync;
na.nm_rxsync = iflib_netmap_rxsync;
na.nm_register = iflib_netmap_register;
na.nm_intr = iflib_netmap_intr;
na.num_tx_rings = ctx->ifc_softc_ctx.isc_ntxqsets;
na.num_rx_rings = ctx->ifc_softc_ctx.isc_nrxqsets;
return (netmap_attach(&na));
}
static void
iflib_netmap_txq_init(if_ctx_t ctx, iflib_txq_t txq)
{
struct netmap_adapter *na = NA(ctx->ifc_ifp);
struct netmap_slot *slot;
slot = netmap_reset(na, NR_TX, txq->ift_id, 0);
if (slot == NULL)
return;
if (txq->ift_sds.ifsd_map == NULL)
return;
for (int i = 0; i < ctx->ifc_softc_ctx.isc_ntxd[0]; i++) {
/*
* In netmap mode, set the map for the packet buffer.
* NOTE: Some drivers (not this one) also need to set
* the physical buffer address in the NIC ring.
* netmap_idx_n2k() maps a nic index, i, into the corresponding
* netmap slot index, si
*/
int si = netmap_idx_n2k(&na->tx_rings[txq->ift_id], i);
netmap_load_map(na, txq->ift_desc_tag, txq->ift_sds.ifsd_map[i], NMB(na, slot + si));
}
}
static void
iflib_netmap_rxq_init(if_ctx_t ctx, iflib_rxq_t rxq)
{
struct netmap_adapter *na = NA(ctx->ifc_ifp);
struct netmap_kring *kring = &na->rx_rings[rxq->ifr_id];
struct netmap_slot *slot;
uint32_t nm_i;
slot = netmap_reset(na, NR_RX, rxq->ifr_id, 0);
if (slot == NULL)
return;
nm_i = netmap_idx_n2k(kring, 0);
netmap_fl_refill(rxq, kring, nm_i, true);
}
#define iflib_netmap_detach(ifp) netmap_detach(ifp)
#else
#define iflib_netmap_txq_init(ctx, txq)
#define iflib_netmap_rxq_init(ctx, rxq)
#define iflib_netmap_detach(ifp)
#define iflib_netmap_attach(ctx) (0)
#define netmap_rx_irq(ifp, qid, budget) (0)
#define netmap_tx_irq(ifp, qid) do {} while (0)
#endif
#if defined(__i386__) || defined(__amd64__)
static __inline void
prefetch(void *x)
{
__asm volatile("prefetcht0 %0" :: "m" (*(unsigned long *)x));
}
static __inline void
prefetch2cachelines(void *x)
{
__asm volatile("prefetcht0 %0" :: "m" (*(unsigned long *)x));
#if (CACHE_LINE_SIZE < 128)
__asm volatile("prefetcht0 %0" :: "m" (*(((unsigned long *)x)+CACHE_LINE_SIZE/(sizeof(unsigned long)))));
#endif
}
#else
#define prefetch(x)
#define prefetch2cachelines(x)
#endif
static void
iru_init(if_rxd_update_t iru, iflib_rxq_t rxq, uint8_t flid)
{
iflib_fl_t fl;
fl = &rxq->ifr_fl[flid];
iru->iru_paddrs = fl->ifl_bus_addrs;
iru->iru_vaddrs = &fl->ifl_vm_addrs[0];
iru->iru_idxs = fl->ifl_rxd_idxs;
iru->iru_qsidx = rxq->ifr_id;
iru->iru_buf_size = fl->ifl_buf_size;
iru->iru_flidx = fl->ifl_id;
}
static void
_iflib_dmamap_cb(void *arg, bus_dma_segment_t *segs, int nseg, int err)
{
if (err)
return;
*(bus_addr_t *) arg = segs[0].ds_addr;
}
int
iflib_dma_alloc(if_ctx_t ctx, int size, iflib_dma_info_t dma, int mapflags)
{
int err;
if_shared_ctx_t sctx = ctx->ifc_sctx;
device_t dev = ctx->ifc_dev;
KASSERT(sctx->isc_q_align != 0, ("alignment value not initialized"));
err = bus_dma_tag_create(bus_get_dma_tag(dev), /* parent */
sctx->isc_q_align, 0, /* alignment, bounds */
BUS_SPACE_MAXADDR, /* lowaddr */
BUS_SPACE_MAXADDR, /* highaddr */
NULL, NULL, /* filter, filterarg */
size, /* maxsize */
1, /* nsegments */
size, /* maxsegsize */
BUS_DMA_ALLOCNOW, /* flags */
NULL, /* lockfunc */
NULL, /* lockarg */
&dma->idi_tag);
if (err) {
device_printf(dev,
"%s: bus_dma_tag_create failed: %d\n",
__func__, err);
goto fail_0;
}
err = bus_dmamem_alloc(dma->idi_tag, (void**) &dma->idi_vaddr,
BUS_DMA_NOWAIT | BUS_DMA_COHERENT | BUS_DMA_ZERO, &dma->idi_map);
if (err) {
device_printf(dev,
"%s: bus_dmamem_alloc(%ju) failed: %d\n",
__func__, (uintmax_t)size, err);
goto fail_1;
}
dma->idi_paddr = IF_BAD_DMA;
err = bus_dmamap_load(dma->idi_tag, dma->idi_map, dma->idi_vaddr,
size, _iflib_dmamap_cb, &dma->idi_paddr, mapflags | BUS_DMA_NOWAIT);
if (err || dma->idi_paddr == IF_BAD_DMA) {
device_printf(dev,
"%s: bus_dmamap_load failed: %d\n",
__func__, err);
goto fail_2;
}
dma->idi_size = size;
return (0);
fail_2:
bus_dmamem_free(dma->idi_tag, dma->idi_vaddr, dma->idi_map);
fail_1:
bus_dma_tag_destroy(dma->idi_tag);
fail_0:
dma->idi_tag = NULL;
return (err);
}
int
iflib_dma_alloc_multi(if_ctx_t ctx, int *sizes, iflib_dma_info_t *dmalist, int mapflags, int count)
{
int i, err;
iflib_dma_info_t *dmaiter;
dmaiter = dmalist;
for (i = 0; i < count; i++, dmaiter++) {
if ((err = iflib_dma_alloc(ctx, sizes[i], *dmaiter, mapflags)) != 0)
break;
}
if (err)
iflib_dma_free_multi(dmalist, i);
return (err);
}
void
iflib_dma_free(iflib_dma_info_t dma)
{
if (dma->idi_tag == NULL)
return;
if (dma->idi_paddr != IF_BAD_DMA) {
bus_dmamap_sync(dma->idi_tag, dma->idi_map,
BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE);
bus_dmamap_unload(dma->idi_tag, dma->idi_map);
dma->idi_paddr = IF_BAD_DMA;
}
if (dma->idi_vaddr != NULL) {
bus_dmamem_free(dma->idi_tag, dma->idi_vaddr, dma->idi_map);
dma->idi_vaddr = NULL;
}
bus_dma_tag_destroy(dma->idi_tag);
dma->idi_tag = NULL;
}
void
iflib_dma_free_multi(iflib_dma_info_t *dmalist, int count)
{
int i;
iflib_dma_info_t *dmaiter = dmalist;
for (i = 0; i < count; i++, dmaiter++)
iflib_dma_free(*dmaiter);
}
#ifdef EARLY_AP_STARTUP
static const int iflib_started = 1;
#else
/*
* We used to abuse the smp_started flag to decide if the queues have been
* fully initialized (by late taskqgroup_adjust() calls in a SYSINIT()).
* That gave bad races, since the SYSINIT() runs strictly after smp_started
* is set. Run a SYSINIT() strictly after that to just set a usable
* completion flag.
*/
static int iflib_started;
static void
iflib_record_started(void *arg)
{
iflib_started = 1;
}
SYSINIT(iflib_record_started, SI_SUB_SMP + 1, SI_ORDER_FIRST,
iflib_record_started, NULL);
#endif
static int
iflib_fast_intr(void *arg)
{
iflib_filter_info_t info = arg;
struct grouptask *gtask = info->ifi_task;
if (!iflib_started)
return (FILTER_HANDLED);
DBG_COUNTER_INC(fast_intrs);
if (info->ifi_filter != NULL && info->ifi_filter(info->ifi_filter_arg) == FILTER_HANDLED)
return (FILTER_HANDLED);
GROUPTASK_ENQUEUE(gtask);
return (FILTER_HANDLED);
}
static int
iflib_fast_intr_rxtx(void *arg)
{
iflib_filter_info_t info = arg;
struct grouptask *gtask = info->ifi_task;
iflib_rxq_t rxq = (iflib_rxq_t)info->ifi_ctx;
if_ctx_t ctx;
int i, cidx;
if (!iflib_started)
return (FILTER_HANDLED);
DBG_COUNTER_INC(fast_intrs);
if (info->ifi_filter != NULL && info->ifi_filter(info->ifi_filter_arg) == FILTER_HANDLED)
return (FILTER_HANDLED);
for (i = 0; i < rxq->ifr_ntxqirq; i++) {
qidx_t txqid = rxq->ifr_txqid[i];
ctx = rxq->ifr_ctx;
if (!ctx->isc_txd_credits_update(ctx->ifc_softc, txqid, false)) {
IFDI_TX_QUEUE_INTR_ENABLE(ctx, txqid);
continue;
}
GROUPTASK_ENQUEUE(&ctx->ifc_txqs[txqid].ift_task);
}
if (ctx->ifc_sctx->isc_flags & IFLIB_HAS_RXCQ)
cidx = rxq->ifr_cq_cidx;
else
cidx = rxq->ifr_fl[0].ifl_cidx;
if (iflib_rxd_avail(ctx, rxq, cidx, 1))
GROUPTASK_ENQUEUE(gtask);
else
IFDI_RX_QUEUE_INTR_ENABLE(ctx, rxq->ifr_id);
return (FILTER_HANDLED);
}
static int
iflib_fast_intr_ctx(void *arg)
{
iflib_filter_info_t info = arg;
struct grouptask *gtask = info->ifi_task;
if (!iflib_started)
return (FILTER_HANDLED);
DBG_COUNTER_INC(fast_intrs);
if (info->ifi_filter != NULL && info->ifi_filter(info->ifi_filter_arg) == FILTER_HANDLED)
return (FILTER_HANDLED);
GROUPTASK_ENQUEUE(gtask);
return (FILTER_HANDLED);
}
static int
_iflib_irq_alloc(if_ctx_t ctx, if_irq_t irq, int rid,
driver_filter_t filter, driver_intr_t handler, void *arg,
char *name)
{
int rc, flags;
struct resource *res;
void *tag = NULL;
device_t dev = ctx->ifc_dev;
flags = RF_ACTIVE;
if (ctx->ifc_flags & IFC_LEGACY)
flags |= RF_SHAREABLE;
MPASS(rid < 512);
irq->ii_rid = rid;
res = bus_alloc_resource_any(dev, SYS_RES_IRQ, &irq->ii_rid, flags);
if (res == NULL) {
device_printf(dev,
"failed to allocate IRQ for rid %d, name %s.\n", rid, name);
return (ENOMEM);
}
irq->ii_res = res;
KASSERT(filter == NULL || handler == NULL, ("filter and handler can't both be non-NULL"));
rc = bus_setup_intr(dev, res, INTR_MPSAFE | INTR_TYPE_NET,
filter, handler, arg, &tag);
if (rc != 0) {
device_printf(dev,
"failed to setup interrupt for rid %d, name %s: %d\n",
rid, name ? name : "unknown", rc);
return (rc);
} else if (name)
bus_describe_intr(dev, res, tag, "%s", name);
irq->ii_tag = tag;
return (0);
}
/*********************************************************************
*
* Allocate memory for tx_buffer structures. The tx_buffer stores all
* the information needed to transmit a packet on the wire. This is
* called only once at attach, setup is done every reset.
*
**********************************************************************/
static int
iflib_txsd_alloc(iflib_txq_t txq)
{
if_ctx_t ctx = txq->ift_ctx;
if_shared_ctx_t sctx = ctx->ifc_sctx;
if_softc_ctx_t scctx = &ctx->ifc_softc_ctx;
device_t dev = ctx->ifc_dev;
int err, nsegments, ntsosegments;
nsegments = scctx->isc_tx_nsegments;
ntsosegments = scctx->isc_tx_tso_segments_max;
MPASS(scctx->isc_ntxd[0] > 0);
MPASS(scctx->isc_ntxd[txq->ift_br_offset] > 0);
MPASS(nsegments > 0);
MPASS(ntsosegments > 0);
/*
* Setup DMA descriptor areas.
*/
if ((err = bus_dma_tag_create(bus_get_dma_tag(dev),
1, 0, /* alignment, bounds */
BUS_SPACE_MAXADDR, /* lowaddr */
BUS_SPACE_MAXADDR, /* highaddr */
NULL, NULL, /* filter, filterarg */
sctx->isc_tx_maxsize, /* maxsize */
nsegments, /* nsegments */
sctx->isc_tx_maxsegsize, /* maxsegsize */
0, /* flags */
NULL, /* lockfunc */
NULL, /* lockfuncarg */
&txq->ift_desc_tag))) {
device_printf(dev,"Unable to allocate TX DMA tag: %d\n", err);
device_printf(dev,"maxsize: %ju nsegments: %d maxsegsize: %ju\n",
(uintmax_t)sctx->isc_tx_maxsize, nsegments, (uintmax_t)sctx->isc_tx_maxsegsize);
goto fail;
}
if ((err = bus_dma_tag_create(bus_get_dma_tag(dev),
1, 0, /* alignment, bounds */
BUS_SPACE_MAXADDR, /* lowaddr */
BUS_SPACE_MAXADDR, /* highaddr */
NULL, NULL, /* filter, filterarg */
scctx->isc_tx_tso_size_max, /* maxsize */
ntsosegments, /* nsegments */
scctx->isc_tx_tso_segsize_max, /* maxsegsize */
0, /* flags */
NULL, /* lockfunc */
NULL, /* lockfuncarg */
&txq->ift_tso_desc_tag))) {
device_printf(dev,"Unable to allocate TX TSO DMA tag: %d\n", err);
goto fail;
}
if (!(txq->ift_sds.ifsd_flags =
(uint8_t *) malloc(sizeof(uint8_t) *
scctx->isc_ntxd[txq->ift_br_offset], M_IFLIB, M_NOWAIT | M_ZERO))) {
device_printf(dev, "Unable to allocate tx_buffer memory\n");
err = ENOMEM;
goto fail;
}
if (!(txq->ift_sds.ifsd_m =
(struct mbuf **) malloc(sizeof(struct mbuf *) *
scctx->isc_ntxd[txq->ift_br_offset], M_IFLIB, M_NOWAIT | M_ZERO))) {
device_printf(dev, "Unable to allocate tx_buffer memory\n");
err = ENOMEM;
goto fail;
}
/* Create the descriptor buffer dma maps */
#if defined(ACPI_DMAR) || (! (defined(__i386__) || defined(__amd64__)))
if ((ctx->ifc_flags & IFC_DMAR) == 0)
return (0);
if (!(txq->ift_sds.ifsd_map =
(bus_dmamap_t *) malloc(sizeof(bus_dmamap_t) * scctx->isc_ntxd[txq->ift_br_offset], M_IFLIB, M_NOWAIT | M_ZERO))) {
device_printf(dev, "Unable to allocate tx_buffer map memory\n");
err = ENOMEM;
goto fail;
}
for (int i = 0; i < scctx->isc_ntxd[txq->ift_br_offset]; i++) {
err = bus_dmamap_create(txq->ift_desc_tag, 0, &txq->ift_sds.ifsd_map[i]);
if (err != 0) {
device_printf(dev, "Unable to create TX DMA map\n");
goto fail;
}
}
#endif
return (0);
fail:
/* We free all, it handles case where we are in the middle */
iflib_tx_structures_free(ctx);
return (err);
}
static void
iflib_txsd_destroy(if_ctx_t ctx, iflib_txq_t txq, int i)
{
bus_dmamap_t map;
map = NULL;
if (txq->ift_sds.ifsd_map != NULL)
map = txq->ift_sds.ifsd_map[i];
if (map != NULL) {
bus_dmamap_unload(txq->ift_desc_tag, map);
bus_dmamap_destroy(txq->ift_desc_tag, map);
txq->ift_sds.ifsd_map[i] = NULL;
}
}
static void
iflib_txq_destroy(iflib_txq_t txq)
{
if_ctx_t ctx = txq->ift_ctx;
for (int i = 0; i < txq->ift_size; i++)
iflib_txsd_destroy(ctx, txq, i);
if (txq->ift_sds.ifsd_map != NULL) {
free(txq->ift_sds.ifsd_map, M_IFLIB);
txq->ift_sds.ifsd_map = NULL;
}
if (txq->ift_sds.ifsd_m != NULL) {
free(txq->ift_sds.ifsd_m, M_IFLIB);
txq->ift_sds.ifsd_m = NULL;
}
if (txq->ift_sds.ifsd_flags != NULL) {
free(txq->ift_sds.ifsd_flags, M_IFLIB);
txq->ift_sds.ifsd_flags = NULL;
}
if (txq->ift_desc_tag != NULL) {
bus_dma_tag_destroy(txq->ift_desc_tag);
txq->ift_desc_tag = NULL;
}
if (txq->ift_tso_desc_tag != NULL) {
bus_dma_tag_destroy(txq->ift_tso_desc_tag);
txq->ift_tso_desc_tag = NULL;
}
}
static void
iflib_txsd_free(if_ctx_t ctx, iflib_txq_t txq, int i)
{
struct mbuf **mp;
mp = &txq->ift_sds.ifsd_m[i];
if (*mp == NULL)
return;
if (txq->ift_sds.ifsd_map != NULL) {
bus_dmamap_sync(txq->ift_desc_tag,
txq->ift_sds.ifsd_map[i],
BUS_DMASYNC_POSTWRITE);
bus_dmamap_unload(txq->ift_desc_tag,
txq->ift_sds.ifsd_map[i]);
}
m_free(*mp);
DBG_COUNTER_INC(tx_frees);
*mp = NULL;
}
static int
iflib_txq_setup(iflib_txq_t txq)
{
if_ctx_t ctx = txq->ift_ctx;
if_softc_ctx_t scctx = &ctx->ifc_softc_ctx;
iflib_dma_info_t di;
int i;
/* Set number of descriptors available */
txq->ift_qstatus = IFLIB_QUEUE_IDLE;
/* XXX make configurable */
txq->ift_update_freq = IFLIB_DEFAULT_TX_UPDATE_FREQ;
/* Reset indices */
txq->ift_cidx_processed = 0;
txq->ift_pidx = txq->ift_cidx = txq->ift_npending = 0;
txq->ift_size = scctx->isc_ntxd[txq->ift_br_offset];
for (i = 0, di = txq->ift_ifdi; i < ctx->ifc_nhwtxqs; i++, di++)
bzero((void *)di->idi_vaddr, di->idi_size);
IFDI_TXQ_SETUP(ctx, txq->ift_id);
for (i = 0, di = txq->ift_ifdi; i < ctx->ifc_nhwtxqs; i++, di++)
bus_dmamap_sync(di->idi_tag, di->idi_map,
BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);
return (0);
}
/*********************************************************************
*
* Allocate memory for rx_buffer structures. Since we use one
* rx_buffer per received packet, the maximum number of rx_buffer's
* that we'll need is equal to the number of receive descriptors
* that we've allocated.
*
**********************************************************************/
static int
iflib_rxsd_alloc(iflib_rxq_t rxq)
{
if_ctx_t ctx = rxq->ifr_ctx;
if_shared_ctx_t sctx = ctx->ifc_sctx;
if_softc_ctx_t scctx = &ctx->ifc_softc_ctx;
device_t dev = ctx->ifc_dev;
iflib_fl_t fl;
int err;
MPASS(scctx->isc_nrxd[0] > 0);
MPASS(scctx->isc_nrxd[rxq->ifr_fl_offset] > 0);
fl = rxq->ifr_fl;
for (int i = 0; i < rxq->ifr_nfl; i++, fl++) {
fl->ifl_size = scctx->isc_nrxd[rxq->ifr_fl_offset]; /* this isn't necessarily the same */
err = bus_dma_tag_create(bus_get_dma_tag(dev), /* parent */
1, 0, /* alignment, bounds */
BUS_SPACE_MAXADDR, /* lowaddr */
BUS_SPACE_MAXADDR, /* highaddr */
NULL, NULL, /* filter, filterarg */
sctx->isc_rx_maxsize, /* maxsize */
sctx->isc_rx_nsegments, /* nsegments */
sctx->isc_rx_maxsegsize, /* maxsegsize */
0, /* flags */
NULL, /* lockfunc */
NULL, /* lockarg */
&fl->ifl_desc_tag);
if (err) {
device_printf(dev, "%s: bus_dma_tag_create failed %d\n",
__func__, err);
goto fail;
}
if (!(fl->ifl_sds.ifsd_flags =
(uint8_t *) malloc(sizeof(uint8_t) *
scctx->isc_nrxd[rxq->ifr_fl_offset], M_IFLIB, M_NOWAIT | M_ZERO))) {
device_printf(dev, "Unable to allocate tx_buffer memory\n");
err = ENOMEM;
goto fail;
}
if (!(fl->ifl_sds.ifsd_m =
(struct mbuf **) malloc(sizeof(struct mbuf *) *
scctx->isc_nrxd[rxq->ifr_fl_offset], M_IFLIB, M_NOWAIT | M_ZERO))) {
device_printf(dev, "Unable to allocate tx_buffer memory\n");
err = ENOMEM;
goto fail;
}
if (!(fl->ifl_sds.ifsd_cl =
(caddr_t *) malloc(sizeof(caddr_t) *
scctx->isc_nrxd[rxq->ifr_fl_offset], M_IFLIB, M_NOWAIT | M_ZERO))) {
device_printf(dev, "Unable to allocate tx_buffer memory\n");
err = ENOMEM;
goto fail;
}
/* Create the descriptor buffer dma maps */
#if defined(ACPI_DMAR) || (! (defined(__i386__) || defined(__amd64__)))
if ((ctx->ifc_flags & IFC_DMAR) == 0)
continue;
if (!(fl->ifl_sds.ifsd_map =
(bus_dmamap_t *) malloc(sizeof(bus_dmamap_t) * scctx->isc_nrxd[rxq->ifr_fl_offset], M_IFLIB, M_NOWAIT | M_ZERO))) {
device_printf(dev, "Unable to allocate tx_buffer map memory\n");
err = ENOMEM;
goto fail;
}
for (int i = 0; i < scctx->isc_nrxd[rxq->ifr_fl_offset]; i++) {
err = bus_dmamap_create(fl->ifl_desc_tag, 0, &fl->ifl_sds.ifsd_map[i]);
if (err != 0) {
device_printf(dev, "Unable to create RX buffer DMA map\n");
goto fail;
}
}
#endif
}
return (0);
fail:
iflib_rx_structures_free(ctx);
return (err);
}
/*
* Internal service routines
*/
struct rxq_refill_cb_arg {
int error;
bus_dma_segment_t seg;
int nseg;
};
static void
_rxq_refill_cb(void *arg, bus_dma_segment_t *segs, int nseg, int error)
{
struct rxq_refill_cb_arg *cb_arg = arg;
cb_arg->error = error;
cb_arg->seg = segs[0];
cb_arg->nseg = nseg;
}
#ifdef ACPI_DMAR
#define IS_DMAR(ctx) (ctx->ifc_flags & IFC_DMAR)
#else
#define IS_DMAR(ctx) (0)
#endif
/**
* rxq_refill - refill an rxq free-buffer list
* @ctx: the iflib context
* @rxq: the free-list to refill
* @n: the number of new buffers to allocate
*
* (Re)populate an rxq free-buffer list with up to @n new packet buffers.
* The caller must assure that @n does not exceed the queue's capacity.
*/
static void
_iflib_fl_refill(if_ctx_t ctx, iflib_fl_t fl, int count)
{
struct mbuf *m;
int idx, frag_idx = fl->ifl_fragidx;
int pidx = fl->ifl_pidx;
caddr_t cl, *sd_cl;
struct mbuf **sd_m;
uint8_t *sd_flags;
struct if_rxd_update iru;
bus_dmamap_t *sd_map;
int n, i = 0;
uint64_t bus_addr;
int err;
qidx_t credits;
sd_m = fl->ifl_sds.ifsd_m;
sd_map = fl->ifl_sds.ifsd_map;
sd_cl = fl->ifl_sds.ifsd_cl;
sd_flags = fl->ifl_sds.ifsd_flags;
idx = pidx;
credits = fl->ifl_credits;
n = count;
MPASS(n > 0);
MPASS(credits + n <= fl->ifl_size);
if (pidx < fl->ifl_cidx)
MPASS(pidx + n <= fl->ifl_cidx);
if (pidx == fl->ifl_cidx && (credits < fl->ifl_size))
MPASS(fl->ifl_gen == 0);
if (pidx > fl->ifl_cidx)
MPASS(n <= fl->ifl_size - pidx + fl->ifl_cidx);
DBG_COUNTER_INC(fl_refills);
if (n > 8)
DBG_COUNTER_INC(fl_refills_large);
iru_init(&iru, fl->ifl_rxq, fl->ifl_id);
while (n--) {
/*
* We allocate an uninitialized mbuf + cluster, mbuf is
* initialized after rx.
*
* If the cluster is still set then we know a minimum sized packet was received
*/
bit_ffc_at(fl->ifl_rx_bitmap, frag_idx, fl->ifl_size, &frag_idx);
if ((frag_idx < 0) || (frag_idx >= fl->ifl_size))
bit_ffc(fl->ifl_rx_bitmap, fl->ifl_size, &frag_idx);
if ((cl = sd_cl[frag_idx]) == NULL) {
if ((cl = sd_cl[frag_idx] = m_cljget(NULL, M_NOWAIT, fl->ifl_buf_size)) == NULL)
break;
#if MEMORY_LOGGING
fl->ifl_cl_enqueued++;
#endif
}
if ((m = m_gethdr(M_NOWAIT, MT_NOINIT)) == NULL) {
break;
}
#if MEMORY_LOGGING
fl->ifl_m_enqueued++;
#endif
DBG_COUNTER_INC(rx_allocs);
#if defined(__i386__) || defined(__amd64__)
if (!IS_DMAR(ctx)) {
bus_addr = pmap_kextract((vm_offset_t)cl);
} else
#endif
{
struct rxq_refill_cb_arg cb_arg;
iflib_rxq_t q;
cb_arg.error = 0;
q = fl->ifl_rxq;
MPASS(sd_map != NULL);
MPASS(sd_map[frag_idx] != NULL);
err = bus_dmamap_load(fl->ifl_desc_tag, sd_map[frag_idx],
cl, fl->ifl_buf_size, _rxq_refill_cb, &cb_arg, 0);
bus_dmamap_sync(fl->ifl_desc_tag, sd_map[frag_idx],
BUS_DMASYNC_PREREAD);
if (err != 0 || cb_arg.error) {
/*
* !zone_pack ?
*/
if (fl->ifl_zone == zone_pack)
uma_zfree(fl->ifl_zone, cl);
m_free(m);
n = 0;
goto done;
}
bus_addr = cb_arg.seg.ds_addr;
}
bit_set(fl->ifl_rx_bitmap, frag_idx);
sd_flags[frag_idx] |= RX_SW_DESC_INUSE;
MPASS(sd_m[frag_idx] == NULL);
sd_cl[frag_idx] = cl;
sd_m[frag_idx] = m;
fl->ifl_rxd_idxs[i] = frag_idx;
fl->ifl_bus_addrs[i] = bus_addr;
fl->ifl_vm_addrs[i] = cl;
credits++;
i++;
MPASS(credits <= fl->ifl_size);
if (++idx == fl->ifl_size) {
fl->ifl_gen = 1;
idx = 0;
}
if (n == 0 || i == IFLIB_MAX_RX_REFRESH) {
iru.iru_pidx = pidx;
iru.iru_count = i;
ctx->isc_rxd_refill(ctx->ifc_softc, &iru);
i = 0;
pidx = idx;
fl->ifl_pidx = idx;
fl->ifl_credits = credits;
}
}
done:
if (i) {
iru.iru_pidx = pidx;
iru.iru_count = i;
ctx->isc_rxd_refill(ctx->ifc_softc, &iru);
fl->ifl_pidx = idx;
fl->ifl_credits = credits;
}
DBG_COUNTER_INC(rxd_flush);
if (fl->ifl_pidx == 0)
pidx = fl->ifl_size - 1;
else
pidx = fl->ifl_pidx - 1;
if (sd_map)
bus_dmamap_sync(fl->ifl_ifdi->idi_tag, fl->ifl_ifdi->idi_map,
BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);
ctx->isc_rxd_flush(ctx->ifc_softc, fl->ifl_rxq->ifr_id, fl->ifl_id, pidx);
fl->ifl_fragidx = frag_idx;
}
static __inline void
__iflib_fl_refill_lt(if_ctx_t ctx, iflib_fl_t fl, int max)
{
/* we avoid allowing pidx to catch up with cidx as it confuses ixl */
int32_t reclaimable = fl->ifl_size - fl->ifl_credits - 1;
#ifdef INVARIANTS
int32_t delta = fl->ifl_size - get_inuse(fl->ifl_size, fl->ifl_cidx, fl->ifl_pidx, fl->ifl_gen) - 1;
#endif
MPASS(fl->ifl_credits <= fl->ifl_size);
MPASS(reclaimable == delta);
if (reclaimable > 0)
_iflib_fl_refill(ctx, fl, min(max, reclaimable));
}
static void
iflib_fl_bufs_free(iflib_fl_t fl)
{
iflib_dma_info_t idi = fl->ifl_ifdi;
uint32_t i;
for (i = 0; i < fl->ifl_size; i++) {
struct mbuf **sd_m = &fl->ifl_sds.ifsd_m[i];
uint8_t *sd_flags = &fl->ifl_sds.ifsd_flags[i];
caddr_t *sd_cl = &fl->ifl_sds.ifsd_cl[i];
if (*sd_flags & RX_SW_DESC_INUSE) {
if (fl->ifl_sds.ifsd_map != NULL) {
bus_dmamap_t sd_map = fl->ifl_sds.ifsd_map[i];
bus_dmamap_unload(fl->ifl_desc_tag, sd_map);
bus_dmamap_destroy(fl->ifl_desc_tag, sd_map);
}
if (*sd_m != NULL) {
m_init(*sd_m, M_NOWAIT, MT_DATA, 0);
uma_zfree(zone_mbuf, *sd_m);
}
if (*sd_cl != NULL)
uma_zfree(fl->ifl_zone, *sd_cl);
*sd_flags = 0;
} else {
MPASS(*sd_cl == NULL);
MPASS(*sd_m == NULL);
}
#if MEMORY_LOGGING
fl->ifl_m_dequeued++;
fl->ifl_cl_dequeued++;
#endif
*sd_cl = NULL;
*sd_m = NULL;
}
#ifdef INVARIANTS
for (i = 0; i < fl->ifl_size; i++) {
MPASS(fl->ifl_sds.ifsd_flags[i] == 0);
MPASS(fl->ifl_sds.ifsd_cl[i] == NULL);
MPASS(fl->ifl_sds.ifsd_m[i] == NULL);
}
#endif
/*
* Reset free list values
*/
fl->ifl_credits = fl->ifl_cidx = fl->ifl_pidx = fl->ifl_gen = fl->ifl_fragidx = 0;
bzero(idi->idi_vaddr, idi->idi_size);
}
/*********************************************************************
*
* Initialize a receive ring and its buffers.
*
**********************************************************************/
static int
iflib_fl_setup(iflib_fl_t fl)
{
iflib_rxq_t rxq = fl->ifl_rxq;
if_ctx_t ctx = rxq->ifr_ctx;
if_softc_ctx_t sctx = &ctx->ifc_softc_ctx;
bit_nclear(fl->ifl_rx_bitmap, 0, fl->ifl_size - 1);
/*
** Free current RX buffer structs and their mbufs
*/
iflib_fl_bufs_free(fl);
/* Now replenish the mbufs */
MPASS(fl->ifl_credits == 0);
/*
* XXX don't set the max_frame_size to larger
* than the hardware can handle
*/
if (sctx->isc_max_frame_size <= 2048)
fl->ifl_buf_size = MCLBYTES;
#ifndef CONTIGMALLOC_WORKS
else
fl->ifl_buf_size = MJUMPAGESIZE;
#else
else if (sctx->isc_max_frame_size <= 4096)
fl->ifl_buf_size = MJUMPAGESIZE;
else if (sctx->isc_max_frame_size <= 9216)
fl->ifl_buf_size = MJUM9BYTES;
else
fl->ifl_buf_size = MJUM16BYTES;
#endif
if (fl->ifl_buf_size > ctx->ifc_max_fl_buf_size)
ctx->ifc_max_fl_buf_size = fl->ifl_buf_size;
fl->ifl_cltype = m_gettype(fl->ifl_buf_size);
fl->ifl_zone = m_getzone(fl->ifl_buf_size);
/* avoid pre-allocating zillions of clusters to an idle card
* potentially speeding up attach
*/
_iflib_fl_refill(ctx, fl, min(128, fl->ifl_size));
MPASS(min(128, fl->ifl_size) == fl->ifl_credits);
if (min(128, fl->ifl_size) != fl->ifl_credits)
return (ENOBUFS);
/*
* handle failure
*/
MPASS(rxq != NULL);
MPASS(fl->ifl_ifdi != NULL);
bus_dmamap_sync(fl->ifl_ifdi->idi_tag, fl->ifl_ifdi->idi_map,
BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);
return (0);
}
/*********************************************************************
*
* Free receive ring data structures
*
**********************************************************************/
static void
iflib_rx_sds_free(iflib_rxq_t rxq)
{
iflib_fl_t fl;
int i;
if (rxq->ifr_fl != NULL) {
for (i = 0; i < rxq->ifr_nfl; i++) {
fl = &rxq->ifr_fl[i];
if (fl->ifl_desc_tag != NULL) {
bus_dma_tag_destroy(fl->ifl_desc_tag);
fl->ifl_desc_tag = NULL;
}
free(fl->ifl_sds.ifsd_m, M_IFLIB);
free(fl->ifl_sds.ifsd_cl, M_IFLIB);
/* XXX destroy maps first */
free(fl->ifl_sds.ifsd_map, M_IFLIB);
fl->ifl_sds.ifsd_m = NULL;
fl->ifl_sds.ifsd_cl = NULL;
fl->ifl_sds.ifsd_map = NULL;
}
free(rxq->ifr_fl, M_IFLIB);
rxq->ifr_fl = NULL;
rxq->ifr_cq_gen = rxq->ifr_cq_cidx = rxq->ifr_cq_pidx = 0;
}
}
/*
* MI independent logic
*
*/
static void
iflib_timer(void *arg)
{
iflib_txq_t txq = arg;
if_ctx_t ctx = txq->ift_ctx;
if_softc_ctx_t sctx = &ctx->ifc_softc_ctx;
if (!(if_getdrvflags(ctx->ifc_ifp) & IFF_DRV_RUNNING))
return;
/*
** Check on the state of the TX queue(s), this
** can be done without the lock because its RO
** and the HUNG state will be static if set.
*/
IFDI_TIMER(ctx, txq->ift_id);
if ((txq->ift_qstatus == IFLIB_QUEUE_HUNG) &&
((txq->ift_cleaned_prev == txq->ift_cleaned) ||
(sctx->isc_pause_frames == 0)))
goto hung;
if (ifmp_ring_is_stalled(txq->ift_br))
txq->ift_qstatus = IFLIB_QUEUE_HUNG;
txq->ift_cleaned_prev = txq->ift_cleaned;
/* handle any laggards */
if (txq->ift_db_pending)
GROUPTASK_ENQUEUE(&txq->ift_task);
sctx->isc_pause_frames = 0;
if (if_getdrvflags(ctx->ifc_ifp) & IFF_DRV_RUNNING)
callout_reset_on(&txq->ift_timer, hz/2, iflib_timer, txq, txq->ift_timer.c_cpu);
return;
hung:
CTX_LOCK(ctx);
if_setdrvflagbits(ctx->ifc_ifp, IFF_DRV_OACTIVE, IFF_DRV_RUNNING);
device_printf(ctx->ifc_dev, "TX(%d) desc avail = %d, pidx = %d\n",
txq->ift_id, TXQ_AVAIL(txq), txq->ift_pidx);
IFDI_WATCHDOG_RESET(ctx);
ctx->ifc_watchdog_events++;
ctx->ifc_flags |= IFC_DO_RESET;
iflib_admin_intr_deferred(ctx);
CTX_UNLOCK(ctx);
}
static void
iflib_init_locked(if_ctx_t ctx)
{
if_softc_ctx_t sctx = &ctx->ifc_softc_ctx;
if_softc_ctx_t scctx = &ctx->ifc_softc_ctx;
if_t ifp = ctx->ifc_ifp;
iflib_fl_t fl;
iflib_txq_t txq;
iflib_rxq_t rxq;
int i, j, tx_ip_csum_flags, tx_ip6_csum_flags;
if_setdrvflagbits(ifp, IFF_DRV_OACTIVE, IFF_DRV_RUNNING);
IFDI_INTR_DISABLE(ctx);
tx_ip_csum_flags = scctx->isc_tx_csum_flags & (CSUM_IP | CSUM_TCP | CSUM_UDP | CSUM_SCTP);
tx_ip6_csum_flags = scctx->isc_tx_csum_flags & (CSUM_IP6_TCP | CSUM_IP6_UDP | CSUM_IP6_SCTP);
/* Set hardware offload abilities */
if_clearhwassist(ifp);
if (if_getcapenable(ifp) & IFCAP_TXCSUM)
if_sethwassistbits(ifp, tx_ip_csum_flags, 0);
if (if_getcapenable(ifp) & IFCAP_TXCSUM_IPV6)
if_sethwassistbits(ifp, tx_ip6_csum_flags, 0);
if (if_getcapenable(ifp) & IFCAP_TSO4)
if_sethwassistbits(ifp, CSUM_IP_TSO, 0);
if (if_getcapenable(ifp) & IFCAP_TSO6)
if_sethwassistbits(ifp, CSUM_IP6_TSO, 0);
for (i = 0, txq = ctx->ifc_txqs; i < sctx->isc_ntxqsets; i++, txq++) {
CALLOUT_LOCK(txq);
callout_stop(&txq->ift_timer);
CALLOUT_UNLOCK(txq);
iflib_netmap_txq_init(ctx, txq);
}
#ifdef INVARIANTS
i = if_getdrvflags(ifp);
#endif
IFDI_INIT(ctx);
MPASS(if_getdrvflags(ifp) == i);
for (i = 0, rxq = ctx->ifc_rxqs; i < sctx->isc_nrxqsets; i++, rxq++) {
/* XXX this should really be done on a per-queue basis */
if (if_getcapenable(ifp) & IFCAP_NETMAP) {
MPASS(rxq->ifr_id == i);
iflib_netmap_rxq_init(ctx, rxq);
continue;
}
for (j = 0, fl = rxq->ifr_fl; j < rxq->ifr_nfl; j++, fl++) {
if (iflib_fl_setup(fl)) {
device_printf(ctx->ifc_dev, "freelist setup failed - check cluster settings\n");
goto done;
}
}
}
done:
if_setdrvflagbits(ctx->ifc_ifp, IFF_DRV_RUNNING, IFF_DRV_OACTIVE);
IFDI_INTR_ENABLE(ctx);
txq = ctx->ifc_txqs;
for (i = 0; i < sctx->isc_ntxqsets; i++, txq++)
callout_reset_on(&txq->ift_timer, hz/2, iflib_timer, txq,
txq->ift_timer.c_cpu);
}
static int
iflib_media_change(if_t ifp)
{
if_ctx_t ctx = if_getsoftc(ifp);
int err;
CTX_LOCK(ctx);
if ((err = IFDI_MEDIA_CHANGE(ctx)) == 0)
iflib_init_locked(ctx);
CTX_UNLOCK(ctx);
return (err);
}
static void
iflib_media_status(if_t ifp, struct ifmediareq *ifmr)
{
if_ctx_t ctx = if_getsoftc(ifp);
CTX_LOCK(ctx);
IFDI_UPDATE_ADMIN_STATUS(ctx);
IFDI_MEDIA_STATUS(ctx, ifmr);
CTX_UNLOCK(ctx);
}
static void
iflib_stop(if_ctx_t ctx)
{
iflib_txq_t txq = ctx->ifc_txqs;
iflib_rxq_t rxq = ctx->ifc_rxqs;
if_softc_ctx_t scctx = &ctx->ifc_softc_ctx;
iflib_dma_info_t di;
iflib_fl_t fl;
int i, j;
/* Tell the stack that the interface is no longer active */
if_setdrvflagbits(ctx->ifc_ifp, IFF_DRV_OACTIVE, IFF_DRV_RUNNING);
IFDI_INTR_DISABLE(ctx);
DELAY(1000);
IFDI_STOP(ctx);
DELAY(1000);
iflib_debug_reset();
/* Wait for current tx queue users to exit to disarm watchdog timer. */
for (i = 0; i < scctx->isc_ntxqsets; i++, txq++) {
/* make sure all transmitters have completed before proceeding XXX */
/* clean any enqueued buffers */
iflib_ifmp_purge(txq);
/* Free any existing tx buffers. */
for (j = 0; j < txq->ift_size; j++) {
iflib_txsd_free(ctx, txq, j);
}
txq->ift_processed = txq->ift_cleaned = txq->ift_cidx_processed = 0;
txq->ift_in_use = txq->ift_gen = txq->ift_cidx = txq->ift_pidx = txq->ift_no_desc_avail = 0;
txq->ift_closed = txq->ift_mbuf_defrag = txq->ift_mbuf_defrag_failed = 0;
txq->ift_no_tx_dma_setup = txq->ift_txd_encap_efbig = txq->ift_map_failed = 0;
txq->ift_pullups = 0;
ifmp_ring_reset_stats(txq->ift_br);
for (j = 0, di = txq->ift_ifdi; j < ctx->ifc_nhwtxqs; j++, di++)
bzero((void *)di->idi_vaddr, di->idi_size);
}
for (i = 0; i < scctx->isc_nrxqsets; i++, rxq++) {
/* make sure all transmitters have completed before proceeding XXX */
for (j = 0, di = txq->ift_ifdi; j < ctx->ifc_nhwrxqs; j++, di++)
bzero((void *)di->idi_vaddr, di->idi_size);
/* also resets the free lists pidx/cidx */
for (j = 0, fl = rxq->ifr_fl; j < rxq->ifr_nfl; j++, fl++)
iflib_fl_bufs_free(fl);
}
}
static inline caddr_t
calc_next_rxd(iflib_fl_t fl, int cidx)
{
qidx_t size;
int nrxd;
caddr_t start, end, cur, next;
nrxd = fl->ifl_size;
size = fl->ifl_rxd_size;
start = fl->ifl_ifdi->idi_vaddr;
if (__predict_false(size == 0))
return (start);
cur = start + size*cidx;
end = start + size*nrxd;
next = CACHE_PTR_NEXT(cur);
return (next < end ? next : start);
}
static inline void
prefetch_pkts(iflib_fl_t fl, int cidx)
{
int nextptr;
int nrxd = fl->ifl_size;
caddr_t next_rxd;
nextptr = (cidx + CACHE_PTR_INCREMENT) & (nrxd-1);
prefetch(&fl->ifl_sds.ifsd_m[nextptr]);
prefetch(&fl->ifl_sds.ifsd_cl[nextptr]);
next_rxd = calc_next_rxd(fl, cidx);
prefetch(next_rxd);
prefetch(fl->ifl_sds.ifsd_m[(cidx + 1) & (nrxd-1)]);
prefetch(fl->ifl_sds.ifsd_m[(cidx + 2) & (nrxd-1)]);
prefetch(fl->ifl_sds.ifsd_m[(cidx + 3) & (nrxd-1)]);
prefetch(fl->ifl_sds.ifsd_m[(cidx + 4) & (nrxd-1)]);
prefetch(fl->ifl_sds.ifsd_cl[(cidx + 1) & (nrxd-1)]);
prefetch(fl->ifl_sds.ifsd_cl[(cidx + 2) & (nrxd-1)]);
prefetch(fl->ifl_sds.ifsd_cl[(cidx + 3) & (nrxd-1)]);
prefetch(fl->ifl_sds.ifsd_cl[(cidx + 4) & (nrxd-1)]);
}
static void
rxd_frag_to_sd(iflib_rxq_t rxq, if_rxd_frag_t irf, int unload, if_rxsd_t sd)
{
int flid, cidx;
bus_dmamap_t map;
iflib_fl_t fl;
iflib_dma_info_t di;
int next;
map = NULL;
flid = irf->irf_flid;
cidx = irf->irf_idx;
fl = &rxq->ifr_fl[flid];
sd->ifsd_fl = fl;
sd->ifsd_cidx = cidx;
sd->ifsd_m = &fl->ifl_sds.ifsd_m[cidx];
sd->ifsd_cl = &fl->ifl_sds.ifsd_cl[cidx];
fl->ifl_credits--;
#if MEMORY_LOGGING
fl->ifl_m_dequeued++;
#endif
if (rxq->ifr_ctx->ifc_flags & IFC_PREFETCH)
prefetch_pkts(fl, cidx);
if (fl->ifl_sds.ifsd_map != NULL) {
next = (cidx + CACHE_PTR_INCREMENT) & (fl->ifl_size-1);
prefetch(&fl->ifl_sds.ifsd_map[next]);
map = fl->ifl_sds.ifsd_map[cidx];
di = fl->ifl_ifdi;
next = (cidx + CACHE_LINE_SIZE) & (fl->ifl_size-1);
prefetch(&fl->ifl_sds.ifsd_flags[next]);
bus_dmamap_sync(di->idi_tag, di->idi_map,
BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE);
/* not valid assert if bxe really does SGE from non-contiguous elements */
MPASS(fl->ifl_cidx == cidx);
if (unload)
bus_dmamap_unload(fl->ifl_desc_tag, map);
}
fl->ifl_cidx = (fl->ifl_cidx + 1) & (fl->ifl_size-1);
if (__predict_false(fl->ifl_cidx == 0))
fl->ifl_gen = 0;
if (map != NULL)
bus_dmamap_sync(fl->ifl_ifdi->idi_tag, fl->ifl_ifdi->idi_map,
BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);
bit_clear(fl->ifl_rx_bitmap, cidx);
}
static struct mbuf *
assemble_segments(iflib_rxq_t rxq, if_rxd_info_t ri, if_rxsd_t sd)
{
int i, padlen , flags;
struct mbuf *m, *mh, *mt;
caddr_t cl;
i = 0;
mh = NULL;
do {
rxd_frag_to_sd(rxq, &ri->iri_frags[i], TRUE, sd);
MPASS(*sd->ifsd_cl != NULL);
MPASS(*sd->ifsd_m != NULL);
/* Don't include zero-length frags */
if (ri->iri_frags[i].irf_len == 0) {
/* XXX we can save the cluster here, but not the mbuf */
m_init(*sd->ifsd_m, M_NOWAIT, MT_DATA, 0);
m_free(*sd->ifsd_m);
*sd->ifsd_m = NULL;
continue;
}
m = *sd->ifsd_m;
*sd->ifsd_m = NULL;
if (mh == NULL) {
flags = M_PKTHDR|M_EXT;
mh = mt = m;
padlen = ri->iri_pad;
} else {
flags = M_EXT;
mt->m_next = m;
mt = m;
/* assuming padding is only on the first fragment */
padlen = 0;
}
cl = *sd->ifsd_cl;
*sd->ifsd_cl = NULL;
/* Can these two be made one ? */
m_init(m, M_NOWAIT, MT_DATA, flags);
m_cljset(m, cl, sd->ifsd_fl->ifl_cltype);
/*
* These must follow m_init and m_cljset
*/
m->m_data += padlen;
ri->iri_len -= padlen;
m->m_len = ri->iri_frags[i].irf_len;
} while (++i < ri->iri_nfrags);
return (mh);
}
/*
* Process one software descriptor
*/
static struct mbuf *
iflib_rxd_pkt_get(iflib_rxq_t rxq, if_rxd_info_t ri)
{
struct if_rxsd sd;
struct mbuf *m;
/* should I merge this back in now that the two paths are basically duplicated? */
if (ri->iri_nfrags == 1 &&
ri->iri_frags[0].irf_len <= IFLIB_RX_COPY_THRESH) {
rxd_frag_to_sd(rxq, &ri->iri_frags[0], FALSE, &sd);
m = *sd.ifsd_m;
*sd.ifsd_m = NULL;
m_init(m, M_NOWAIT, MT_DATA, M_PKTHDR);
#ifndef __NO_STRICT_ALIGNMENT
if (!IP_ALIGNED(m))
m->m_data += 2;
#endif
memcpy(m->m_data, *sd.ifsd_cl, ri->iri_len);
m->m_len = ri->iri_frags[0].irf_len;
} else {
m = assemble_segments(rxq, ri, &sd);
}
m->m_pkthdr.len = ri->iri_len;
m->m_pkthdr.rcvif = ri->iri_ifp;
m->m_flags |= ri->iri_flags;
m->m_pkthdr.ether_vtag = ri->iri_vtag;
m->m_pkthdr.flowid = ri->iri_flowid;
M_HASHTYPE_SET(m, ri->iri_rsstype);
m->m_pkthdr.csum_flags = ri->iri_csum_flags;
m->m_pkthdr.csum_data = ri->iri_csum_data;
return (m);
}
#if defined(INET6) || defined(INET)
static void
iflib_get_ip_forwarding(struct lro_ctrl *lc, bool *v4, bool *v6)
{
CURVNET_SET(lc->ifp->if_vnet);
#if defined(INET6)
*v6 = VNET(ip6_forwarding);
#endif
#if defined(INET)
*v4 = VNET(ipforwarding);
#endif
CURVNET_RESTORE();
}
/*
* Returns true if it's possible this packet could be LROed.
* if it returns false, it is guaranteed that tcp_lro_rx()
* would not return zero.
*/
static bool
iflib_check_lro_possible(struct mbuf *m, bool v4_forwarding, bool v6_forwarding)
{
struct ether_header *eh;
uint16_t eh_type;
eh = mtod(m, struct ether_header *);
eh_type = ntohs(eh->ether_type);
switch (eh_type) {
#if defined(INET6)
case ETHERTYPE_IPV6:
return !v6_forwarding;
#endif
#if defined (INET)
case ETHERTYPE_IP:
return !v4_forwarding;
#endif
}
return false;
}
#else
static void
iflib_get_ip_forwarding(struct lro_ctrl *lc __unused, bool *v4 __unused, bool *v6 __unused)
{
}
#endif
static bool
iflib_rxeof(iflib_rxq_t rxq, qidx_t budget)
{
if_ctx_t ctx = rxq->ifr_ctx;
if_shared_ctx_t sctx = ctx->ifc_sctx;
if_softc_ctx_t scctx = &ctx->ifc_softc_ctx;
int avail, i;
qidx_t *cidxp;
struct if_rxd_info ri;
int err, budget_left, rx_bytes, rx_pkts;
iflib_fl_t fl;
struct ifnet *ifp;
int lro_enabled;
bool lro_possible = false;
bool v4_forwarding, v6_forwarding;
/*
* XXX early demux data packets so that if_input processing only handles
* acks in interrupt context
*/
struct mbuf *m, *mh, *mt, *mf;
ifp = ctx->ifc_ifp;
mh = mt = NULL;
MPASS(budget > 0);
rx_pkts = rx_bytes = 0;
if (sctx->isc_flags & IFLIB_HAS_RXCQ)
cidxp = &rxq->ifr_cq_cidx;
else
cidxp = &rxq->ifr_fl[0].ifl_cidx;
if ((avail = iflib_rxd_avail(ctx, rxq, *cidxp, budget)) == 0) {
for (i = 0, fl = &rxq->ifr_fl[0]; i < sctx->isc_nfl; i++, fl++)
__iflib_fl_refill_lt(ctx, fl, budget + 8);
DBG_COUNTER_INC(rx_unavail);
return (false);
}
for (budget_left = budget; (budget_left > 0) && (avail > 0); budget_left--, avail--) {
if (__predict_false(!CTX_ACTIVE(ctx))) {
DBG_COUNTER_INC(rx_ctx_inactive);
break;
}
/*
* Reset client set fields to their default values
*/
rxd_info_zero(&ri);
ri.iri_qsidx = rxq->ifr_id;
ri.iri_cidx = *cidxp;
ri.iri_ifp = ifp;
ri.iri_frags = rxq->ifr_frags;
err = ctx->isc_rxd_pkt_get(ctx->ifc_softc, &ri);
if (err)
goto err;
if (sctx->isc_flags & IFLIB_HAS_RXCQ) {
*cidxp = ri.iri_cidx;
/* Update our consumer index */
/* XXX NB: shurd - check if this is still safe */
while (rxq->ifr_cq_cidx >= scctx->isc_nrxd[0]) {
rxq->ifr_cq_cidx -= scctx->isc_nrxd[0];
rxq->ifr_cq_gen = 0;
}
/* was this only a completion queue message? */
if (__predict_false(ri.iri_nfrags == 0))
continue;
}
MPASS(ri.iri_nfrags != 0);
MPASS(ri.iri_len != 0);
/* will advance the cidx on the corresponding free lists */
m = iflib_rxd_pkt_get(rxq, &ri);
if (avail == 0 && budget_left)
avail = iflib_rxd_avail(ctx, rxq, *cidxp, budget_left);
if (__predict_false(m == NULL)) {
DBG_COUNTER_INC(rx_mbuf_null);
continue;
}
/* imm_pkt: -- cxgb */
if (mh == NULL)
mh = mt = m;
else {
mt->m_nextpkt = m;
mt = m;
}
}
/* make sure that we can refill faster than drain */
for (i = 0, fl = &rxq->ifr_fl[0]; i < sctx->isc_nfl; i++, fl++)
__iflib_fl_refill_lt(ctx, fl, budget + 8);
lro_enabled = (if_getcapenable(ifp) & IFCAP_LRO);
if (lro_enabled)
iflib_get_ip_forwarding(&rxq->ifr_lc, &v4_forwarding, &v6_forwarding);
mt = mf = NULL;
while (mh != NULL) {
m = mh;
mh = mh->m_nextpkt;
m->m_nextpkt = NULL;
#ifndef __NO_STRICT_ALIGNMENT
if (!IP_ALIGNED(m) && (m = iflib_fixup_rx(m)) == NULL)
continue;
#endif
rx_bytes += m->m_pkthdr.len;
rx_pkts++;
#if defined(INET6) || defined(INET)
if (lro_enabled) {
if (!lro_possible) {
lro_possible = iflib_check_lro_possible(m, v4_forwarding, v6_forwarding);
if (lro_possible && mf != NULL) {
ifp->if_input(ifp, mf);
DBG_COUNTER_INC(rx_if_input);
mt = mf = NULL;
}
}
if (lro_possible && tcp_lro_rx(&rxq->ifr_lc, m, 0) == 0)
continue;
}
#endif
if (lro_possible) {
ifp->if_input(ifp, m);
DBG_COUNTER_INC(rx_if_input);
continue;
}
if (mf == NULL)
mf = m;
if (mt != NULL)
mt->m_nextpkt = m;
mt = m;
}
if (mf != NULL) {
ifp->if_input(ifp, mf);
DBG_COUNTER_INC(rx_if_input);
}
if_inc_counter(ifp, IFCOUNTER_IBYTES, rx_bytes);
if_inc_counter(ifp, IFCOUNTER_IPACKETS, rx_pkts);
/*
* Flush any outstanding LRO work
*/
#if defined(INET6) || defined(INET)
tcp_lro_flush_all(&rxq->ifr_lc);
#endif
if (avail)
return true;
return (iflib_rxd_avail(ctx, rxq, *cidxp, 1));
err:
CTX_LOCK(ctx);
ctx->ifc_flags |= IFC_DO_RESET;
iflib_admin_intr_deferred(ctx);
CTX_UNLOCK(ctx);
return (false);
}
#define TXD_NOTIFY_COUNT(txq) (((txq)->ift_size / (txq)->ift_update_freq)-1)
static inline qidx_t
txq_max_db_deferred(iflib_txq_t txq, qidx_t in_use)
{
qidx_t notify_count = TXD_NOTIFY_COUNT(txq);
qidx_t minthresh = txq->ift_size / 8;
if (in_use > 4*minthresh)
return (notify_count);
if (in_use > 2*minthresh)
return (notify_count >> 1);
if (in_use > minthresh)
return (notify_count >> 3);
return (0);
}
static inline qidx_t
txq_max_rs_deferred(iflib_txq_t txq)
{
qidx_t notify_count = TXD_NOTIFY_COUNT(txq);
qidx_t minthresh = txq->ift_size / 8;
if (txq->ift_in_use > 4*minthresh)
return (notify_count);
if (txq->ift_in_use > 2*minthresh)
return (notify_count >> 1);
if (txq->ift_in_use > minthresh)
return (notify_count >> 2);
return (2);
}
#define M_CSUM_FLAGS(m) ((m)->m_pkthdr.csum_flags)
#define M_HAS_VLANTAG(m) (m->m_flags & M_VLANTAG)
#define TXQ_MAX_DB_DEFERRED(txq, in_use) txq_max_db_deferred((txq), (in_use))
#define TXQ_MAX_RS_DEFERRED(txq) txq_max_rs_deferred(txq)
#define TXQ_MAX_DB_CONSUMED(size) (size >> 4)
/* forward compatibility for cxgb */
#define FIRST_QSET(ctx) 0
#define NTXQSETS(ctx) ((ctx)->ifc_softc_ctx.isc_ntxqsets)
#define NRXQSETS(ctx) ((ctx)->ifc_softc_ctx.isc_nrxqsets)
#define QIDX(ctx, m) ((((m)->m_pkthdr.flowid & ctx->ifc_softc_ctx.isc_rss_table_mask) % NTXQSETS(ctx)) + FIRST_QSET(ctx))
#define DESC_RECLAIMABLE(q) ((int)((q)->ift_processed - (q)->ift_cleaned - (q)->ift_ctx->ifc_softc_ctx.isc_tx_nsegments))
/* XXX we should be setting this to something other than zero */
#define RECLAIM_THRESH(ctx) ((ctx)->ifc_sctx->isc_tx_reclaim_thresh)
#define MAX_TX_DESC(ctx) ((ctx)->ifc_softc_ctx.isc_tx_tso_segments_max)
static inline bool
iflib_txd_db_check(if_ctx_t ctx, iflib_txq_t txq, int ring, qidx_t in_use)
{
qidx_t dbval, max;
bool rang;
rang = false;
max = TXQ_MAX_DB_DEFERRED(txq, in_use);
if (ring || txq->ift_db_pending >= max) {
dbval = txq->ift_npending ? txq->ift_npending : txq->ift_pidx;
ctx->isc_txd_flush(ctx->ifc_softc, txq->ift_id, dbval);
txq->ift_db_pending = txq->ift_npending = 0;
rang = true;
}
return (rang);
}
#ifdef PKT_DEBUG
static void
print_pkt(if_pkt_info_t pi)
{
printf("pi len: %d qsidx: %d nsegs: %d ndescs: %d flags: %x pidx: %d\n",
pi->ipi_len, pi->ipi_qsidx, pi->ipi_nsegs, pi->ipi_ndescs, pi->ipi_flags, pi->ipi_pidx);
printf("pi new_pidx: %d csum_flags: %lx tso_segsz: %d mflags: %x vtag: %d\n",
pi->ipi_new_pidx, pi->ipi_csum_flags, pi->ipi_tso_segsz, pi->ipi_mflags, pi->ipi_vtag);
printf("pi etype: %d ehdrlen: %d ip_hlen: %d ipproto: %d\n",
pi->ipi_etype, pi->ipi_ehdrlen, pi->ipi_ip_hlen, pi->ipi_ipproto);
}
#endif
#define IS_TSO4(pi) ((pi)->ipi_csum_flags & CSUM_IP_TSO)
#define IS_TSO6(pi) ((pi)->ipi_csum_flags & CSUM_IP6_TSO)
static int
iflib_parse_header(iflib_txq_t txq, if_pkt_info_t pi, struct mbuf **mp)
{
if_shared_ctx_t sctx = txq->ift_ctx->ifc_sctx;
struct ether_vlan_header *eh;
struct mbuf *m, *n;
n = m = *mp;
if ((sctx->isc_flags & IFLIB_NEED_SCRATCH) &&
M_WRITABLE(m) == 0) {
if ((m = m_dup(m, M_NOWAIT)) == NULL) {
return (ENOMEM);
} else {
m_freem(*mp);
n = *mp = m;
}
}
/*
* Determine where frame payload starts.
* Jump over vlan headers if already present,
* helpful for QinQ too.
*/
if (__predict_false(m->m_len < sizeof(*eh))) {
txq->ift_pullups++;
if (__predict_false((m = m_pullup(m, sizeof(*eh))) == NULL))
return (ENOMEM);
}
eh = mtod(m, struct ether_vlan_header *);
if (eh->evl_encap_proto == htons(ETHERTYPE_VLAN)) {
pi->ipi_etype = ntohs(eh->evl_proto);
pi->ipi_ehdrlen = ETHER_HDR_LEN + ETHER_VLAN_ENCAP_LEN;
} else {
pi->ipi_etype = ntohs(eh->evl_encap_proto);
pi->ipi_ehdrlen = ETHER_HDR_LEN;
}
switch (pi->ipi_etype) {
#ifdef INET
case ETHERTYPE_IP:
{
struct ip *ip = NULL;
struct tcphdr *th = NULL;
int minthlen;
minthlen = min(m->m_pkthdr.len, pi->ipi_ehdrlen + sizeof(*ip) + sizeof(*th));
if (__predict_false(m->m_len < minthlen)) {
/*
* if this code bloat is causing too much of a hit
* move it to a separate function and mark it noinline
*/
if (m->m_len == pi->ipi_ehdrlen) {
n = m->m_next;
MPASS(n);
if (n->m_len >= sizeof(*ip)) {
ip = (struct ip *)n->m_data;
if (n->m_len >= (ip->ip_hl << 2) + sizeof(*th))
th = (struct tcphdr *)((caddr_t)ip + (ip->ip_hl << 2));
} else {
txq->ift_pullups++;
if (__predict_false((m = m_pullup(m, minthlen)) == NULL))
return (ENOMEM);
ip = (struct ip *)(m->m_data + pi->ipi_ehdrlen);
}
} else {
txq->ift_pullups++;
if (__predict_false((m = m_pullup(m, minthlen)) == NULL))
return (ENOMEM);
ip = (struct ip *)(m->m_data + pi->ipi_ehdrlen);
if (m->m_len >= (ip->ip_hl << 2) + sizeof(*th))
th = (struct tcphdr *)((caddr_t)ip + (ip->ip_hl << 2));
}
} else {
ip = (struct ip *)(m->m_data + pi->ipi_ehdrlen);
if (m->m_len >= (ip->ip_hl << 2) + sizeof(*th))
th = (struct tcphdr *)((caddr_t)ip + (ip->ip_hl << 2));
}
pi->ipi_ip_hlen = ip->ip_hl << 2;
pi->ipi_ipproto = ip->ip_p;
pi->ipi_flags |= IPI_TX_IPV4;
if ((sctx->isc_flags & IFLIB_NEED_ZERO_CSUM) && (pi->ipi_csum_flags & CSUM_IP))
ip->ip_sum = 0;
if (IS_TSO4(pi)) {
if (pi->ipi_ipproto == IPPROTO_TCP) {
if (__predict_false(th == NULL)) {
txq->ift_pullups++;
if (__predict_false((m = m_pullup(m, (ip->ip_hl << 2) + sizeof(*th))) == NULL))
return (ENOMEM);
th = (struct tcphdr *)((caddr_t)ip + pi->ipi_ip_hlen);
}
pi->ipi_tcp_hflags = th->th_flags;
pi->ipi_tcp_hlen = th->th_off << 2;
pi->ipi_tcp_seq = th->th_seq;
}
if (__predict_false(ip->ip_p != IPPROTO_TCP))
return (ENXIO);
th->th_sum = in_pseudo(ip->ip_src.s_addr,
ip->ip_dst.s_addr, htons(IPPROTO_TCP));
pi->ipi_tso_segsz = m->m_pkthdr.tso_segsz;
if (sctx->isc_flags & IFLIB_TSO_INIT_IP) {
ip->ip_sum = 0;
ip->ip_len = htons(pi->ipi_ip_hlen + pi->ipi_tcp_hlen + pi->ipi_tso_segsz);
}
}
break;
}
#endif
#ifdef INET6
case ETHERTYPE_IPV6:
{
struct ip6_hdr *ip6 = (struct ip6_hdr *)(m->m_data + pi->ipi_ehdrlen);
struct tcphdr *th;
pi->ipi_ip_hlen = sizeof(struct ip6_hdr);
if (__predict_false(m->m_len < pi->ipi_ehdrlen + sizeof(struct ip6_hdr))) {
if (__predict_false((m = m_pullup(m, pi->ipi_ehdrlen + sizeof(struct ip6_hdr))) == NULL))
return (ENOMEM);
}
th = (struct tcphdr *)((caddr_t)ip6 + pi->ipi_ip_hlen);
/* XXX-BZ this will go badly in case of ext hdrs. */
pi->ipi_ipproto = ip6->ip6_nxt;
pi->ipi_flags |= IPI_TX_IPV6;
if (IS_TSO6(pi)) {
if (pi->ipi_ipproto == IPPROTO_TCP) {
if (__predict_false(m->m_len < pi->ipi_ehdrlen + sizeof(struct ip6_hdr) + sizeof(struct tcphdr))) {
if (__predict_false((m = m_pullup(m, pi->ipi_ehdrlen + sizeof(struct ip6_hdr) + sizeof(struct tcphdr))) == NULL))
return (ENOMEM);
}
pi->ipi_tcp_hflags = th->th_flags;
pi->ipi_tcp_hlen = th->th_off << 2;
}
if (__predict_false(ip6->ip6_nxt != IPPROTO_TCP))
return (ENXIO);
/*
* The corresponding flag is set by the stack in the IPv4
* TSO case, but not in IPv6 (at least in FreeBSD 10.2).
* So, set it here because the rest of the flow requires it.
*/
pi->ipi_csum_flags |= CSUM_TCP_IPV6;
th->th_sum = in6_cksum_pseudo(ip6, 0, IPPROTO_TCP, 0);
pi->ipi_tso_segsz = m->m_pkthdr.tso_segsz;
}
break;
}
#endif
default:
pi->ipi_csum_flags &= ~CSUM_OFFLOAD;
pi->ipi_ip_hlen = 0;
break;
}
*mp = m;
return (0);
}
static __noinline struct mbuf *
collapse_pkthdr(struct mbuf *m0)
{
struct mbuf *m, *m_next, *tmp;
m = m0;
m_next = m->m_next;
while (m_next != NULL && m_next->m_len == 0) {
m = m_next;
m->m_next = NULL;
m_free(m);
m_next = m_next->m_next;
}
m = m0;
m->m_next = m_next;
if ((m_next->m_flags & M_EXT) == 0) {
m = m_defrag(m, M_NOWAIT);
} else {
tmp = m_next->m_next;
memcpy(m_next, m, MPKTHSIZE);
m = m_next;
m->m_next = tmp;
}
return (m);
}
/*
* If dodgy hardware rejects the scatter gather chain we've handed it
* we'll need to remove the mbuf chain from ifsg_m[] before we can add the
* m_defrag'd mbufs
*/
static __noinline struct mbuf *
iflib_remove_mbuf(iflib_txq_t txq)
{
int ntxd, i, pidx;
struct mbuf *m, *mh, **ifsd_m;
pidx = txq->ift_pidx;
ifsd_m = txq->ift_sds.ifsd_m;
ntxd = txq->ift_size;
mh = m = ifsd_m[pidx];
ifsd_m[pidx] = NULL;
#if MEMORY_LOGGING
txq->ift_dequeued++;
#endif
i = 1;
while (m) {
ifsd_m[(pidx + i) & (ntxd -1)] = NULL;
#if MEMORY_LOGGING
txq->ift_dequeued++;
#endif
m = m->m_next;
i++;
}
return (mh);
}
static int
iflib_busdma_load_mbuf_sg(iflib_txq_t txq, bus_dma_tag_t tag, bus_dmamap_t map,
struct mbuf **m0, bus_dma_segment_t *segs, int *nsegs,
int max_segs, int flags)
{
if_ctx_t ctx;
if_shared_ctx_t sctx;
if_softc_ctx_t scctx;
int i, next, pidx, err, ntxd, count;
struct mbuf *m, *tmp, **ifsd_m;
m = *m0;
/*
* Please don't ever do this
*/
if (__predict_false(m->m_len == 0))
*m0 = m = collapse_pkthdr(m);
ctx = txq->ift_ctx;
sctx = ctx->ifc_sctx;
scctx = &ctx->ifc_softc_ctx;
ifsd_m = txq->ift_sds.ifsd_m;
ntxd = txq->ift_size;
pidx = txq->ift_pidx;
if (map != NULL) {
uint8_t *ifsd_flags = txq->ift_sds.ifsd_flags;
err = bus_dmamap_load_mbuf_sg(tag, map,
*m0, segs, nsegs, BUS_DMA_NOWAIT);
if (err)
return (err);
ifsd_flags[pidx] |= TX_SW_DESC_MAPPED;
count = 0;
m = *m0;
do {
if (__predict_false(m->m_len <= 0)) {
tmp = m;
m = m->m_next;
tmp->m_next = NULL;
m_free(tmp);
continue;
}
m = m->m_next;
count++;
} while (m != NULL);
if (count > *nsegs) {
ifsd_m[pidx] = *m0;
ifsd_m[pidx]->m_flags |= M_TOOBIG;
return (0);
}
m = *m0;
count = 0;
do {
next = (pidx + count) & (ntxd-1);
MPASS(ifsd_m[next] == NULL);
ifsd_m[next] = m;
count++;
tmp = m;
m = m->m_next;
} while (m != NULL);
} else {
int buflen, sgsize, maxsegsz, max_sgsize;
vm_offset_t vaddr;
vm_paddr_t curaddr;
count = i = 0;
m = *m0;
if (m->m_pkthdr.csum_flags & CSUM_TSO)
maxsegsz = scctx->isc_tx_tso_segsize_max;
else
maxsegsz = sctx->isc_tx_maxsegsize;
do {
if (__predict_false(m->m_len <= 0)) {
tmp = m;
m = m->m_next;
tmp->m_next = NULL;
m_free(tmp);
continue;
}
buflen = m->m_len;
vaddr = (vm_offset_t)m->m_data;
/*
* see if we can't be smarter about physically
* contiguous mappings
*/
next = (pidx + count) & (ntxd-1);
MPASS(ifsd_m[next] == NULL);
#if MEMORY_LOGGING
txq->ift_enqueued++;
#endif
ifsd_m[next] = m;
while (buflen > 0) {
if (i >= max_segs)
goto err;
max_sgsize = MIN(buflen, maxsegsz);
curaddr = pmap_kextract(vaddr);
sgsize = PAGE_SIZE - (curaddr & PAGE_MASK);
sgsize = MIN(sgsize, max_sgsize);
segs[i].ds_addr = curaddr;
segs[i].ds_len = sgsize;
vaddr += sgsize;
buflen -= sgsize;
i++;
}
count++;
tmp = m;
m = m->m_next;
} while (m != NULL);
*nsegs = i;
}
return (0);
err:
*m0 = iflib_remove_mbuf(txq);
return (EFBIG);
}
static inline caddr_t
calc_next_txd(iflib_txq_t txq, int cidx, uint8_t qid)
{
qidx_t size;
int ntxd;
caddr_t start, end, cur, next;
ntxd = txq->ift_size;
size = txq->ift_txd_size[qid];
start = txq->ift_ifdi[qid].idi_vaddr;
if (__predict_false(size == 0))
return (start);
cur = start + size*cidx;
end = start + size*ntxd;
next = CACHE_PTR_NEXT(cur);
return (next < end ? next : start);
}
/*
* Pad an mbuf to ensure a minimum ethernet frame size.
* min_frame_size is the frame size (less CRC) to pad the mbuf to
*/
static __noinline int
iflib_ether_pad(device_t dev, struct mbuf **m_head, uint16_t min_frame_size)
{
/*
* 18 is enough bytes to pad an ARP packet to 46 bytes, and
* and ARP message is the smallest common payload I can think of
*/
static char pad[18]; /* just zeros */
int n;
struct mbuf *new_head;
if (!M_WRITABLE(*m_head)) {
new_head = m_dup(*m_head, M_NOWAIT);
if (new_head == NULL) {
m_freem(*m_head);
device_printf(dev, "cannot pad short frame, m_dup() failed");
DBG_COUNTER_INC(encap_pad_mbuf_fail);
return ENOMEM;
}
m_freem(*m_head);
*m_head = new_head;
}
for (n = min_frame_size - (*m_head)->m_pkthdr.len;
n > 0; n -= sizeof(pad))
if (!m_append(*m_head, min(n, sizeof(pad)), pad))
break;
if (n > 0) {
m_freem(*m_head);
device_printf(dev, "cannot pad short frame\n");
DBG_COUNTER_INC(encap_pad_mbuf_fail);
return (ENOBUFS);
}
return 0;
}
static int
iflib_encap(iflib_txq_t txq, struct mbuf **m_headp)
{
if_ctx_t ctx;
if_shared_ctx_t sctx;
if_softc_ctx_t scctx;
bus_dma_segment_t *segs;
struct mbuf *m_head;
void *next_txd;
bus_dmamap_t map;
struct if_pkt_info pi;
int remap = 0;
int err, nsegs, ndesc, max_segs, pidx, cidx, next, ntxd;
bus_dma_tag_t desc_tag;
segs = txq->ift_segs;
ctx = txq->ift_ctx;
sctx = ctx->ifc_sctx;
scctx = &ctx->ifc_softc_ctx;
segs = txq->ift_segs;
ntxd = txq->ift_size;
m_head = *m_headp;
map = NULL;
/*
* If we're doing TSO the next descriptor to clean may be quite far ahead
*/
cidx = txq->ift_cidx;
pidx = txq->ift_pidx;
if (ctx->ifc_flags & IFC_PREFETCH) {
next = (cidx + CACHE_PTR_INCREMENT) & (ntxd-1);
if (!(ctx->ifc_flags & IFLIB_HAS_TXCQ)) {
next_txd = calc_next_txd(txq, cidx, 0);
prefetch(next_txd);
}
/* prefetch the next cache line of mbuf pointers and flags */
prefetch(&txq->ift_sds.ifsd_m[next]);
if (txq->ift_sds.ifsd_map != NULL) {
prefetch(&txq->ift_sds.ifsd_map[next]);
next = (cidx + CACHE_LINE_SIZE) & (ntxd-1);
prefetch(&txq->ift_sds.ifsd_flags[next]);
}
} else if (txq->ift_sds.ifsd_map != NULL)
map = txq->ift_sds.ifsd_map[pidx];
if (m_head->m_pkthdr.csum_flags & CSUM_TSO) {
desc_tag = txq->ift_tso_desc_tag;
max_segs = scctx->isc_tx_tso_segments_max;
} else {
desc_tag = txq->ift_desc_tag;
max_segs = scctx->isc_tx_nsegments;
}
if ((sctx->isc_flags & IFLIB_NEED_ETHER_PAD) &&
__predict_false(m_head->m_pkthdr.len < scctx->isc_min_frame_size)) {
err = iflib_ether_pad(ctx->ifc_dev, m_headp, scctx->isc_min_frame_size);
if (err)
return err;
}
m_head = *m_headp;
pkt_info_zero(&pi);
pi.ipi_mflags = (m_head->m_flags & (M_VLANTAG|M_BCAST|M_MCAST));
pi.ipi_pidx = pidx;
pi.ipi_qsidx = txq->ift_id;
pi.ipi_len = m_head->m_pkthdr.len;
pi.ipi_csum_flags = m_head->m_pkthdr.csum_flags;
pi.ipi_vtag = (m_head->m_flags & M_VLANTAG) ? m_head->m_pkthdr.ether_vtag : 0;
/* deliberate bitwise OR to make one condition */
if (__predict_true((pi.ipi_csum_flags | pi.ipi_vtag))) {
if (__predict_false((err = iflib_parse_header(txq, &pi, m_headp)) != 0))
return (err);
m_head = *m_headp;
}
retry:
err = iflib_busdma_load_mbuf_sg(txq, desc_tag, map, m_headp, segs, &nsegs, max_segs, BUS_DMA_NOWAIT);
defrag:
if (__predict_false(err)) {
switch (err) {
case EFBIG:
/* try collapse once and defrag once */
if (remap == 0)
m_head = m_collapse(*m_headp, M_NOWAIT, max_segs);
if (remap == 1)
m_head = m_defrag(*m_headp, M_NOWAIT);
remap++;
if (__predict_false(m_head == NULL))
goto defrag_failed;
txq->ift_mbuf_defrag++;
*m_headp = m_head;
goto retry;
break;
case ENOMEM:
txq->ift_no_tx_dma_setup++;
break;
default:
txq->ift_no_tx_dma_setup++;
m_freem(*m_headp);
DBG_COUNTER_INC(tx_frees);
*m_headp = NULL;
break;
}
txq->ift_map_failed++;
DBG_COUNTER_INC(encap_load_mbuf_fail);
return (err);
}
/*
* XXX assumes a 1 to 1 relationship between segments and
* descriptors - this does not hold true on all drivers, e.g.
* cxgb
*/
if (__predict_false(nsegs + 2 > TXQ_AVAIL(txq))) {
txq->ift_no_desc_avail++;
if (map != NULL)
bus_dmamap_unload(desc_tag, map);
DBG_COUNTER_INC(encap_txq_avail_fail);
if ((txq->ift_task.gt_task.ta_flags & TASK_ENQUEUED) == 0)
GROUPTASK_ENQUEUE(&txq->ift_task);
return (ENOBUFS);
}
/*
* On Intel cards we can greatly reduce the number of TX interrupts
* we see by only setting report status on every Nth descriptor.
* However, this also means that the driver will need to keep track
* of the descriptors that RS was set on to check them for the DD bit.
*/
txq->ift_rs_pending += nsegs + 1;
if (txq->ift_rs_pending > TXQ_MAX_RS_DEFERRED(txq) ||
iflib_no_tx_batch || (TXQ_AVAIL(txq) - nsegs - 1) <= MAX_TX_DESC(ctx)) {
pi.ipi_flags |= IPI_TX_INTR;
txq->ift_rs_pending = 0;
}
pi.ipi_segs = segs;
pi.ipi_nsegs = nsegs;
MPASS(pidx >= 0 && pidx < txq->ift_size);
#ifdef PKT_DEBUG
print_pkt(&pi);
#endif
if (map != NULL)
bus_dmamap_sync(desc_tag, map, BUS_DMASYNC_PREWRITE);
if ((err = ctx->isc_txd_encap(ctx->ifc_softc, &pi)) == 0) {
if (map != NULL)
bus_dmamap_sync(txq->ift_ifdi->idi_tag, txq->ift_ifdi->idi_map,
BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);
DBG_COUNTER_INC(tx_encap);
MPASS(pi.ipi_new_pidx < txq->ift_size);
ndesc = pi.ipi_new_pidx - pi.ipi_pidx;
if (pi.ipi_new_pidx < pi.ipi_pidx) {
ndesc += txq->ift_size;
txq->ift_gen = 1;
}
/*
* drivers can need as many as
* two sentinels
*/
MPASS(ndesc <= pi.ipi_nsegs + 2);
MPASS(pi.ipi_new_pidx != pidx);
MPASS(ndesc > 0);
txq->ift_in_use += ndesc;
/*
* We update the last software descriptor again here because there may
* be a sentinel and/or there may be more mbufs than segments
*/
txq->ift_pidx = pi.ipi_new_pidx;
txq->ift_npending += pi.ipi_ndescs;
} else if (__predict_false(err == EFBIG && remap < 2)) {
*m_headp = m_head = iflib_remove_mbuf(txq);
remap = 1;
txq->ift_txd_encap_efbig++;
goto defrag;
} else
DBG_COUNTER_INC(encap_txd_encap_fail);
return (err);
defrag_failed:
txq->ift_mbuf_defrag_failed++;
txq->ift_map_failed++;
m_freem(*m_headp);
DBG_COUNTER_INC(tx_frees);
*m_headp = NULL;
return (ENOMEM);
}
static void
iflib_tx_desc_free(iflib_txq_t txq, int n)
{
int hasmap;
uint32_t qsize, cidx, mask, gen;
struct mbuf *m, **ifsd_m;
uint8_t *ifsd_flags;
bus_dmamap_t *ifsd_map;
bool do_prefetch;
cidx = txq->ift_cidx;
gen = txq->ift_gen;
qsize = txq->ift_size;
mask = qsize-1;
hasmap = txq->ift_sds.ifsd_map != NULL;
ifsd_flags = txq->ift_sds.ifsd_flags;
ifsd_m = txq->ift_sds.ifsd_m;
ifsd_map = txq->ift_sds.ifsd_map;
do_prefetch = (txq->ift_ctx->ifc_flags & IFC_PREFETCH);
while (n--) {
if (do_prefetch) {
prefetch(ifsd_m[(cidx + 3) & mask]);
prefetch(ifsd_m[(cidx + 4) & mask]);
}
if (ifsd_m[cidx] != NULL) {
prefetch(&ifsd_m[(cidx + CACHE_PTR_INCREMENT) & mask]);
prefetch(&ifsd_flags[(cidx + CACHE_PTR_INCREMENT) & mask]);
if (hasmap && (ifsd_flags[cidx] & TX_SW_DESC_MAPPED)) {
/*
* does it matter if it's not the TSO tag? If so we'll
* have to add the type to flags
*/
bus_dmamap_unload(txq->ift_desc_tag, ifsd_map[cidx]);
ifsd_flags[cidx] &= ~TX_SW_DESC_MAPPED;
}
if ((m = ifsd_m[cidx]) != NULL) {
/* XXX we don't support any drivers that batch packets yet */
MPASS(m->m_nextpkt == NULL);
/* if the number of clusters exceeds the number of segments
* there won't be space on the ring to save a pointer to each
* cluster so we simply free the list here
*/
if (m->m_flags & M_TOOBIG) {
m_freem(m);
} else {
m_free(m);
}
ifsd_m[cidx] = NULL;
#if MEMORY_LOGGING
txq->ift_dequeued++;
#endif
DBG_COUNTER_INC(tx_frees);
}
}
if (__predict_false(++cidx == qsize)) {
cidx = 0;
gen = 0;
}
}
txq->ift_cidx = cidx;
txq->ift_gen = gen;
}
static __inline int
iflib_completed_tx_reclaim(iflib_txq_t txq, int thresh)
{
int reclaim;
if_ctx_t ctx = txq->ift_ctx;
KASSERT(thresh >= 0, ("invalid threshold to reclaim"));
MPASS(thresh /*+ MAX_TX_DESC(txq->ift_ctx) */ < txq->ift_size);
/*
* Need a rate-limiting check so that this isn't called every time
*/
iflib_tx_credits_update(ctx, txq);
reclaim = DESC_RECLAIMABLE(txq);
if (reclaim <= thresh /* + MAX_TX_DESC(txq->ift_ctx) */) {
#ifdef INVARIANTS
if (iflib_verbose_debug) {
printf("%s processed=%ju cleaned=%ju tx_nsegments=%d reclaim=%d thresh=%d\n", __FUNCTION__,
txq->ift_processed, txq->ift_cleaned, txq->ift_ctx->ifc_softc_ctx.isc_tx_nsegments,
reclaim, thresh);
}
#endif
return (0);
}
iflib_tx_desc_free(txq, reclaim);
txq->ift_cleaned += reclaim;
txq->ift_in_use -= reclaim;
return (reclaim);
}
static struct mbuf **
_ring_peek_one(struct ifmp_ring *r, int cidx, int offset, int remaining)
{
int next, size;
struct mbuf **items;
size = r->size;
next = (cidx + CACHE_PTR_INCREMENT) & (size-1);
items = __DEVOLATILE(struct mbuf **, &r->items[0]);
prefetch(items[(cidx + offset) & (size-1)]);
if (remaining > 1) {
prefetch2cachelines(&items[next]);
prefetch2cachelines(items[(cidx + offset + 1) & (size-1)]);
prefetch2cachelines(items[(cidx + offset + 2) & (size-1)]);
prefetch2cachelines(items[(cidx + offset + 3) & (size-1)]);
}
return (__DEVOLATILE(struct mbuf **, &r->items[(cidx + offset) & (size-1)]));
}
static void
iflib_txq_check_drain(iflib_txq_t txq, int budget)
{
ifmp_ring_check_drainage(txq->ift_br, budget);
}
static uint32_t
iflib_txq_can_drain(struct ifmp_ring *r)
{
iflib_txq_t txq = r->cookie;
if_ctx_t ctx = txq->ift_ctx;
return ((TXQ_AVAIL(txq) > MAX_TX_DESC(ctx) + 2) ||
ctx->isc_txd_credits_update(ctx->ifc_softc, txq->ift_id, false));
}
static uint32_t
iflib_txq_drain(struct ifmp_ring *r, uint32_t cidx, uint32_t pidx)
{
iflib_txq_t txq = r->cookie;
if_ctx_t ctx = txq->ift_ctx;
struct ifnet *ifp = ctx->ifc_ifp;
struct mbuf **mp, *m;
int i, count, consumed, pkt_sent, bytes_sent, mcast_sent, avail;
int reclaimed, err, in_use_prev, desc_used;
bool do_prefetch, ring, rang;
if (__predict_false(!(if_getdrvflags(ifp) & IFF_DRV_RUNNING) ||
!LINK_ACTIVE(ctx))) {
DBG_COUNTER_INC(txq_drain_notready);
return (0);
}
reclaimed = iflib_completed_tx_reclaim(txq, RECLAIM_THRESH(ctx));
rang = iflib_txd_db_check(ctx, txq, reclaimed, txq->ift_in_use);
avail = IDXDIFF(pidx, cidx, r->size);
if (__predict_false(ctx->ifc_flags & IFC_QFLUSH)) {
DBG_COUNTER_INC(txq_drain_flushing);
for (i = 0; i < avail; i++) {
m_free(r->items[(cidx + i) & (r->size-1)]);
r->items[(cidx + i) & (r->size-1)] = NULL;
}
return (avail);
}
if (__predict_false(if_getdrvflags(ctx->ifc_ifp) & IFF_DRV_OACTIVE)) {
txq->ift_qstatus = IFLIB_QUEUE_IDLE;
CALLOUT_LOCK(txq);
callout_stop(&txq->ift_timer);
CALLOUT_UNLOCK(txq);
DBG_COUNTER_INC(txq_drain_oactive);
return (0);
}
if (reclaimed)
txq->ift_qstatus = IFLIB_QUEUE_IDLE;
consumed = mcast_sent = bytes_sent = pkt_sent = 0;
count = MIN(avail, TX_BATCH_SIZE);
#ifdef INVARIANTS
if (iflib_verbose_debug)
printf("%s avail=%d ifc_flags=%x txq_avail=%d ", __FUNCTION__,
avail, ctx->ifc_flags, TXQ_AVAIL(txq));
#endif
do_prefetch = (ctx->ifc_flags & IFC_PREFETCH);
avail = TXQ_AVAIL(txq);
for (desc_used = i = 0; i < count && avail > MAX_TX_DESC(ctx) + 2; i++) {
int pidx_prev, rem = do_prefetch ? count - i : 0;
mp = _ring_peek_one(r, cidx, i, rem);
MPASS(mp != NULL && *mp != NULL);
if (__predict_false(*mp == (struct mbuf *)txq)) {
consumed++;
reclaimed++;
continue;
}
in_use_prev = txq->ift_in_use;
pidx_prev = txq->ift_pidx;
err = iflib_encap(txq, mp);
if (__predict_false(err)) {
DBG_COUNTER_INC(txq_drain_encapfail);
/* no room - bail out */
if (err == ENOBUFS)
break;
consumed++;
DBG_COUNTER_INC(txq_drain_encapfail);
/* we can't send this packet - skip it */
continue;
}
consumed++;
pkt_sent++;
m = *mp;
DBG_COUNTER_INC(tx_sent);
bytes_sent += m->m_pkthdr.len;
mcast_sent += !!(m->m_flags & M_MCAST);
avail = TXQ_AVAIL(txq);
txq->ift_db_pending += (txq->ift_in_use - in_use_prev);
desc_used += (txq->ift_in_use - in_use_prev);
ETHER_BPF_MTAP(ifp, m);
if (__predict_false(!(ifp->if_drv_flags & IFF_DRV_RUNNING)))
break;
rang = iflib_txd_db_check(ctx, txq, false, in_use_prev);
}
/* deliberate use of bitwise or to avoid gratuitous short-circuit */
ring = rang ? false : (iflib_min_tx_latency | err) || (TXQ_AVAIL(txq) < MAX_TX_DESC(ctx));
iflib_txd_db_check(ctx, txq, ring, txq->ift_in_use);
if_inc_counter(ifp, IFCOUNTER_OBYTES, bytes_sent);
if_inc_counter(ifp, IFCOUNTER_OPACKETS, pkt_sent);
if (mcast_sent)
if_inc_counter(ifp, IFCOUNTER_OMCASTS, mcast_sent);
#ifdef INVARIANTS
if (iflib_verbose_debug)
printf("consumed=%d\n", consumed);
#endif
return (consumed);
}
static uint32_t
iflib_txq_drain_always(struct ifmp_ring *r)
{
return (1);
}
static uint32_t
iflib_txq_drain_free(struct ifmp_ring *r, uint32_t cidx, uint32_t pidx)
{
int i, avail;
struct mbuf **mp;
iflib_txq_t txq;
txq = r->cookie;
txq->ift_qstatus = IFLIB_QUEUE_IDLE;
CALLOUT_LOCK(txq);
callout_stop(&txq->ift_timer);
CALLOUT_UNLOCK(txq);
avail = IDXDIFF(pidx, cidx, r->size);
for (i = 0; i < avail; i++) {
mp = _ring_peek_one(r, cidx, i, avail - i);
if (__predict_false(*mp == (struct mbuf *)txq))
continue;
m_freem(*mp);
}
MPASS(ifmp_ring_is_stalled(r) == 0);
return (avail);
}
static void
iflib_ifmp_purge(iflib_txq_t txq)
{
struct ifmp_ring *r;
r = txq->ift_br;
r->drain = iflib_txq_drain_free;
r->can_drain = iflib_txq_drain_always;
ifmp_ring_check_drainage(r, r->size);
r->drain = iflib_txq_drain;
r->can_drain = iflib_txq_can_drain;
}
static void
_task_fn_tx(void *context)
{
iflib_txq_t txq = context;
if_ctx_t ctx = txq->ift_ctx;
struct ifnet *ifp = ctx->ifc_ifp;
int rc;
#ifdef IFLIB_DIAGNOSTICS
txq->ift_cpu_exec_count[curcpu]++;
#endif
if (!(if_getdrvflags(ctx->ifc_ifp) & IFF_DRV_RUNNING))
return;
if (if_getcapenable(ifp) & IFCAP_NETMAP) {
if (ctx->isc_txd_credits_update(ctx->ifc_softc, txq->ift_id, false))
netmap_tx_irq(ifp, txq->ift_id);
IFDI_TX_QUEUE_INTR_ENABLE(ctx, txq->ift_id);
return;
}
if (txq->ift_db_pending)
ifmp_ring_enqueue(txq->ift_br, (void **)&txq, 1, TX_BATCH_SIZE);
ifmp_ring_check_drainage(txq->ift_br, TX_BATCH_SIZE);
if (ctx->ifc_flags & IFC_LEGACY)
IFDI_INTR_ENABLE(ctx);
else {
rc = IFDI_TX_QUEUE_INTR_ENABLE(ctx, txq->ift_id);
KASSERT(rc != ENOTSUP, ("MSI-X support requires queue_intr_enable, but not implemented in driver"));
}
}
static void
_task_fn_rx(void *context)
{
iflib_rxq_t rxq = context;
if_ctx_t ctx = rxq->ifr_ctx;
bool more;
int rc;
uint16_t budget;
#ifdef IFLIB_DIAGNOSTICS
rxq->ifr_cpu_exec_count[curcpu]++;
#endif
DBG_COUNTER_INC(task_fn_rxs);
if (__predict_false(!(if_getdrvflags(ctx->ifc_ifp) & IFF_DRV_RUNNING)))
return;
more = true;
#ifdef DEV_NETMAP
if (if_getcapenable(ctx->ifc_ifp) & IFCAP_NETMAP) {
u_int work = 0;
if (netmap_rx_irq(ctx->ifc_ifp, rxq->ifr_id, &work)) {
more = false;
}
}
#endif
budget = ctx->ifc_sysctl_rx_budget;
if (budget == 0)
budget = 16; /* XXX */
if (more == false || (more = iflib_rxeof(rxq, budget)) == false) {
if (ctx->ifc_flags & IFC_LEGACY)
IFDI_INTR_ENABLE(ctx);
else {
DBG_COUNTER_INC(rx_intr_enables);
rc = IFDI_RX_QUEUE_INTR_ENABLE(ctx, rxq->ifr_id);
KASSERT(rc != ENOTSUP, ("MSI-X support requires queue_intr_enable, but not implemented in driver"));
}
}
if (__predict_false(!(if_getdrvflags(ctx->ifc_ifp) & IFF_DRV_RUNNING)))
return;
if (more)
GROUPTASK_ENQUEUE(&rxq->ifr_task);
}
static void
_task_fn_admin(void *context)
{
if_ctx_t ctx = context;
if_softc_ctx_t sctx = &ctx->ifc_softc_ctx;
iflib_txq_t txq;
int i;
if (!(if_getdrvflags(ctx->ifc_ifp) & IFF_DRV_RUNNING)) {
if (!(if_getdrvflags(ctx->ifc_ifp) & IFF_DRV_OACTIVE)) {
return;
}
}
CTX_LOCK(ctx);
for (txq = ctx->ifc_txqs, i = 0; i < sctx->isc_ntxqsets; i++, txq++) {
CALLOUT_LOCK(txq);
callout_stop(&txq->ift_timer);
CALLOUT_UNLOCK(txq);
}
IFDI_UPDATE_ADMIN_STATUS(ctx);
for (txq = ctx->ifc_txqs, i = 0; i < sctx->isc_ntxqsets; i++, txq++)
callout_reset_on(&txq->ift_timer, hz/2, iflib_timer, txq, txq->ift_timer.c_cpu);
IFDI_LINK_INTR_ENABLE(ctx);
if (ctx->ifc_flags & IFC_DO_RESET) {
ctx->ifc_flags &= ~IFC_DO_RESET;
iflib_if_init_locked(ctx);
}
CTX_UNLOCK(ctx);
if (LINK_ACTIVE(ctx) == 0)
return;
for (txq = ctx->ifc_txqs, i = 0; i < sctx->isc_ntxqsets; i++, txq++)
iflib_txq_check_drain(txq, IFLIB_RESTART_BUDGET);
}
static void
_task_fn_iov(void *context)
{
if_ctx_t ctx = context;
if (!(if_getdrvflags(ctx->ifc_ifp) & IFF_DRV_RUNNING))
return;
CTX_LOCK(ctx);
IFDI_VFLR_HANDLE(ctx);
CTX_UNLOCK(ctx);
}
static int
iflib_sysctl_int_delay(SYSCTL_HANDLER_ARGS)
{
int err;
if_int_delay_info_t info;
if_ctx_t ctx;
info = (if_int_delay_info_t)arg1;
ctx = info->iidi_ctx;
info->iidi_req = req;
info->iidi_oidp = oidp;
CTX_LOCK(ctx);
err = IFDI_SYSCTL_INT_DELAY(ctx, info);
CTX_UNLOCK(ctx);
return (err);
}
/*********************************************************************
*
* IFNET FUNCTIONS
*
**********************************************************************/
static void
iflib_if_init_locked(if_ctx_t ctx)
{
iflib_stop(ctx);
iflib_init_locked(ctx);
}
static void
iflib_if_init(void *arg)
{
if_ctx_t ctx = arg;
CTX_LOCK(ctx);
iflib_if_init_locked(ctx);
CTX_UNLOCK(ctx);
}
static int
iflib_if_transmit(if_t ifp, struct mbuf *m)
{
if_ctx_t ctx = if_getsoftc(ifp);
iflib_txq_t txq;
int err, qidx;
if (__predict_false((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0 || !LINK_ACTIVE(ctx))) {
DBG_COUNTER_INC(tx_frees);
m_freem(m);
return (ENOBUFS);
}
MPASS(m->m_nextpkt == NULL);
qidx = 0;
if ((NTXQSETS(ctx) > 1) && M_HASHTYPE_GET(m))
qidx = QIDX(ctx, m);
/*
* XXX calculate buf_ring based on flowid (divvy up bits?)
*/
txq = &ctx->ifc_txqs[qidx];
#ifdef DRIVER_BACKPRESSURE
if (txq->ift_closed) {
while (m != NULL) {
next = m->m_nextpkt;
m->m_nextpkt = NULL;
m_freem(m);
m = next;
}
return (ENOBUFS);
}
#endif
#ifdef notyet
qidx = count = 0;
mp = marr;
next = m;
do {
count++;
next = next->m_nextpkt;
} while (next != NULL);
if (count > nitems(marr))
if ((mp = malloc(count*sizeof(struct mbuf *), M_IFLIB, M_NOWAIT)) == NULL) {
/* XXX check nextpkt */
m_freem(m);
/* XXX simplify for now */
DBG_COUNTER_INC(tx_frees);
return (ENOBUFS);
}
for (next = m, i = 0; next != NULL; i++) {
mp[i] = next;
next = next->m_nextpkt;
mp[i]->m_nextpkt = NULL;
}
#endif
DBG_COUNTER_INC(tx_seen);
err = ifmp_ring_enqueue(txq->ift_br, (void **)&m, 1, TX_BATCH_SIZE);
GROUPTASK_ENQUEUE(&txq->ift_task);
if (err) {
/* support forthcoming later */
#ifdef DRIVER_BACKPRESSURE
txq->ift_closed = TRUE;
#endif
ifmp_ring_check_drainage(txq->ift_br, TX_BATCH_SIZE);
m_freem(m);
}
return (err);
}
static void
iflib_if_qflush(if_t ifp)
{
if_ctx_t ctx = if_getsoftc(ifp);
iflib_txq_t txq = ctx->ifc_txqs;
int i;
CTX_LOCK(ctx);
ctx->ifc_flags |= IFC_QFLUSH;
CTX_UNLOCK(ctx);
for (i = 0; i < NTXQSETS(ctx); i++, txq++)
while (!(ifmp_ring_is_idle(txq->ift_br) || ifmp_ring_is_stalled(txq->ift_br)))
iflib_txq_check_drain(txq, 0);
CTX_LOCK(ctx);
ctx->ifc_flags &= ~IFC_QFLUSH;
CTX_UNLOCK(ctx);
if_qflush(ifp);
}
#define IFCAP_FLAGS (IFCAP_TXCSUM_IPV6 | IFCAP_RXCSUM_IPV6 | IFCAP_HWCSUM | IFCAP_LRO | \
IFCAP_TSO4 | IFCAP_TSO6 | IFCAP_VLAN_HWTAGGING | IFCAP_HWSTATS | \
IFCAP_VLAN_MTU | IFCAP_VLAN_HWFILTER | IFCAP_VLAN_HWTSO)
static int
iflib_if_ioctl(if_t ifp, u_long command, caddr_t data)
{
if_ctx_t ctx = if_getsoftc(ifp);
struct ifreq *ifr = (struct ifreq *)data;
#if defined(INET) || defined(INET6)
struct ifaddr *ifa = (struct ifaddr *)data;
#endif
bool avoid_reset = FALSE;
int err = 0, reinit = 0, bits;
switch (command) {
case SIOCSIFADDR:
#ifdef INET
if (ifa->ifa_addr->sa_family == AF_INET)
avoid_reset = TRUE;
#endif
#ifdef INET6
if (ifa->ifa_addr->sa_family == AF_INET6)
avoid_reset = TRUE;
#endif
/*
** Calling init results in link renegotiation,
** so we avoid doing it when possible.
*/
if (avoid_reset) {
if_setflagbits(ifp, IFF_UP,0);
if (!(if_getdrvflags(ifp)& IFF_DRV_RUNNING))
reinit = 1;
#ifdef INET
if (!(if_getflags(ifp) & IFF_NOARP))
arp_ifinit(ifp, ifa);
#endif
} else
err = ether_ioctl(ifp, command, data);
break;
case SIOCSIFMTU:
CTX_LOCK(ctx);
if (ifr->ifr_mtu == if_getmtu(ifp)) {
CTX_UNLOCK(ctx);
break;
}
bits = if_getdrvflags(ifp);
/* stop the driver and free any clusters before proceeding */
iflib_stop(ctx);
if ((err = IFDI_MTU_SET(ctx, ifr->ifr_mtu)) == 0) {
if (ifr->ifr_mtu > ctx->ifc_max_fl_buf_size)
ctx->ifc_flags |= IFC_MULTISEG;
else
ctx->ifc_flags &= ~IFC_MULTISEG;
err = if_setmtu(ifp, ifr->ifr_mtu);
}
iflib_init_locked(ctx);
if_setdrvflags(ifp, bits);
CTX_UNLOCK(ctx);
break;
case SIOCSIFFLAGS:
CTX_LOCK(ctx);
if (if_getflags(ifp) & IFF_UP) {
if (if_getdrvflags(ifp) & IFF_DRV_RUNNING) {
if ((if_getflags(ifp) ^ ctx->ifc_if_flags) &
(IFF_PROMISC | IFF_ALLMULTI)) {
err = IFDI_PROMISC_SET(ctx, if_getflags(ifp));
}
} else
reinit = 1;
} else if (if_getdrvflags(ifp) & IFF_DRV_RUNNING) {
iflib_stop(ctx);
}
ctx->ifc_if_flags = if_getflags(ifp);
CTX_UNLOCK(ctx);
break;
case SIOCADDMULTI:
case SIOCDELMULTI:
if (if_getdrvflags(ifp) & IFF_DRV_RUNNING) {
CTX_LOCK(ctx);
IFDI_INTR_DISABLE(ctx);
IFDI_MULTI_SET(ctx);
IFDI_INTR_ENABLE(ctx);
CTX_UNLOCK(ctx);
}
break;
case SIOCSIFMEDIA:
CTX_LOCK(ctx);
IFDI_MEDIA_SET(ctx);
CTX_UNLOCK(ctx);
/* falls thru */
case SIOCGIFMEDIA:
case SIOCGIFXMEDIA:
err = ifmedia_ioctl(ifp, ifr, &ctx->ifc_media, command);
break;
case SIOCGI2C:
{
struct ifi2creq i2c;
err = copyin(ifr->ifr_data, &i2c, sizeof(i2c));
if (err != 0)
break;
if (i2c.dev_addr != 0xA0 && i2c.dev_addr != 0xA2) {
err = EINVAL;
break;
}
if (i2c.len > sizeof(i2c.data)) {
err = EINVAL;
break;
}
if ((err = IFDI_I2C_REQ(ctx, &i2c)) == 0)
err = copyout(&i2c, ifr->ifr_data, sizeof(i2c));
break;
}
case SIOCSIFCAP:
{
int mask, setmask;
mask = ifr->ifr_reqcap ^ if_getcapenable(ifp);
setmask = 0;
#ifdef TCP_OFFLOAD
setmask |= mask & (IFCAP_TOE4|IFCAP_TOE6);
#endif
setmask |= (mask & IFCAP_FLAGS);
if (setmask & (IFCAP_RXCSUM | IFCAP_RXCSUM_IPV6))
setmask |= (IFCAP_RXCSUM | IFCAP_RXCSUM_IPV6);
if ((mask & IFCAP_WOL) &&
(if_getcapabilities(ifp) & IFCAP_WOL) != 0)
setmask |= (mask & (IFCAP_WOL_MCAST|IFCAP_WOL_MAGIC));
if_vlancap(ifp);
/*
* want to ensure that traffic has stopped before we change any of the flags
*/
if (setmask) {
CTX_LOCK(ctx);
bits = if_getdrvflags(ifp);
if (bits & IFF_DRV_RUNNING)
iflib_stop(ctx);
if_togglecapenable(ifp, setmask);
if (bits & IFF_DRV_RUNNING)
iflib_init_locked(ctx);
if_setdrvflags(ifp, bits);
CTX_UNLOCK(ctx);
}
break;
}
case SIOCGPRIVATE_0:
case SIOCSDRVSPEC:
case SIOCGDRVSPEC:
CTX_LOCK(ctx);
err = IFDI_PRIV_IOCTL(ctx, command, data);
CTX_UNLOCK(ctx);
break;
default:
err = ether_ioctl(ifp, command, data);
break;
}
if (reinit)
iflib_if_init(ctx);
return (err);
}
static uint64_t
iflib_if_get_counter(if_t ifp, ift_counter cnt)
{
if_ctx_t ctx = if_getsoftc(ifp);
return (IFDI_GET_COUNTER(ctx, cnt));
}
/*********************************************************************
*
* OTHER FUNCTIONS EXPORTED TO THE STACK
*
**********************************************************************/
static void
iflib_vlan_register(void *arg, if_t ifp, uint16_t vtag)
{
if_ctx_t ctx = if_getsoftc(ifp);
if ((void *)ctx != arg)
return;
if ((vtag == 0) || (vtag > 4095))
return;
CTX_LOCK(ctx);
IFDI_VLAN_REGISTER(ctx, vtag);
/* Re-init to load the changes */
if (if_getcapenable(ifp) & IFCAP_VLAN_HWFILTER)
iflib_if_init_locked(ctx);
CTX_UNLOCK(ctx);
}
static void
iflib_vlan_unregister(void *arg, if_t ifp, uint16_t vtag)
{
if_ctx_t ctx = if_getsoftc(ifp);
if ((void *)ctx != arg)
return;
if ((vtag == 0) || (vtag > 4095))
return;
CTX_LOCK(ctx);
IFDI_VLAN_UNREGISTER(ctx, vtag);
/* Re-init to load the changes */
if (if_getcapenable(ifp) & IFCAP_VLAN_HWFILTER)
iflib_if_init_locked(ctx);
CTX_UNLOCK(ctx);
}
static void
iflib_led_func(void *arg, int onoff)
{
if_ctx_t ctx = arg;
CTX_LOCK(ctx);
IFDI_LED_FUNC(ctx, onoff);
CTX_UNLOCK(ctx);
}
/*********************************************************************
*
* BUS FUNCTION DEFINITIONS
*
**********************************************************************/
int
iflib_device_probe(device_t dev)
{
pci_vendor_info_t *ent;
uint16_t pci_vendor_id, pci_device_id;
uint16_t pci_subvendor_id, pci_subdevice_id;
uint16_t pci_rev_id;
if_shared_ctx_t sctx;
if ((sctx = DEVICE_REGISTER(dev)) == NULL || sctx->isc_magic != IFLIB_MAGIC)
return (ENOTSUP);
pci_vendor_id = pci_get_vendor(dev);
pci_device_id = pci_get_device(dev);
pci_subvendor_id = pci_get_subvendor(dev);
pci_subdevice_id = pci_get_subdevice(dev);
pci_rev_id = pci_get_revid(dev);
if (sctx->isc_parse_devinfo != NULL)
sctx->isc_parse_devinfo(&pci_device_id, &pci_subvendor_id, &pci_subdevice_id, &pci_rev_id);
ent = sctx->isc_vendor_info;
while (ent->pvi_vendor_id != 0) {
if (pci_vendor_id != ent->pvi_vendor_id) {
ent++;
continue;
}
if ((pci_device_id == ent->pvi_device_id) &&
((pci_subvendor_id == ent->pvi_subvendor_id) ||
(ent->pvi_subvendor_id == 0)) &&
((pci_subdevice_id == ent->pvi_subdevice_id) ||
(ent->pvi_subdevice_id == 0)) &&
((pci_rev_id == ent->pvi_rev_id) ||
(ent->pvi_rev_id == 0))) {
device_set_desc_copy(dev, ent->pvi_name);
/* this needs to be changed to zero if the bus probing code
* ever stops re-probing on best match because the sctx
* may have its values over written by register calls
* in subsequent probes
*/
return (BUS_PROBE_DEFAULT);
}
ent++;
}
return (ENXIO);
}
int
iflib_device_register(device_t dev, void *sc, if_shared_ctx_t sctx, if_ctx_t *ctxp)
{
int err, rid, msix, msix_bar;
if_ctx_t ctx;
if_t ifp;
if_softc_ctx_t scctx;
int i;
uint16_t main_txq;
uint16_t main_rxq;
ctx = malloc(sizeof(* ctx), M_IFLIB, M_WAITOK|M_ZERO);
if (sc == NULL) {
sc = malloc(sctx->isc_driver->size, M_IFLIB, M_WAITOK|M_ZERO);
device_set_softc(dev, ctx);
ctx->ifc_flags |= IFC_SC_ALLOCATED;
}
ctx->ifc_sctx = sctx;
ctx->ifc_dev = dev;
ctx->ifc_softc = sc;
if ((err = iflib_register(ctx)) != 0) {
device_printf(dev, "iflib_register failed %d\n", err);
return (err);
}
iflib_add_device_sysctl_pre(ctx);
scctx = &ctx->ifc_softc_ctx;
ifp = ctx->ifc_ifp;
/*
* XXX sanity check that ntxd & nrxd are a power of 2
*/
if (ctx->ifc_sysctl_ntxqs != 0)
scctx->isc_ntxqsets = ctx->ifc_sysctl_ntxqs;
if (ctx->ifc_sysctl_nrxqs != 0)
scctx->isc_nrxqsets = ctx->ifc_sysctl_nrxqs;
for (i = 0; i < sctx->isc_ntxqs; i++) {
if (ctx->ifc_sysctl_ntxds[i] != 0)
scctx->isc_ntxd[i] = ctx->ifc_sysctl_ntxds[i];
else
scctx->isc_ntxd[i] = sctx->isc_ntxd_default[i];
}
for (i = 0; i < sctx->isc_nrxqs; i++) {
if (ctx->ifc_sysctl_nrxds[i] != 0)
scctx->isc_nrxd[i] = ctx->ifc_sysctl_nrxds[i];
else
scctx->isc_nrxd[i] = sctx->isc_nrxd_default[i];
}
for (i = 0; i < sctx->isc_nrxqs; i++) {
if (scctx->isc_nrxd[i] < sctx->isc_nrxd_min[i]) {
device_printf(dev, "nrxd%d: %d less than nrxd_min %d - resetting to min\n",
i, scctx->isc_nrxd[i], sctx->isc_nrxd_min[i]);
scctx->isc_nrxd[i] = sctx->isc_nrxd_min[i];
}
if (scctx->isc_nrxd[i] > sctx->isc_nrxd_max[i]) {
device_printf(dev, "nrxd%d: %d greater than nrxd_max %d - resetting to max\n",
i, scctx->isc_nrxd[i], sctx->isc_nrxd_max[i]);
scctx->isc_nrxd[i] = sctx->isc_nrxd_max[i];
}
}
for (i = 0; i < sctx->isc_ntxqs; i++) {
if (scctx->isc_ntxd[i] < sctx->isc_ntxd_min[i]) {
device_printf(dev, "ntxd%d: %d less than ntxd_min %d - resetting to min\n",
i, scctx->isc_ntxd[i], sctx->isc_ntxd_min[i]);
scctx->isc_ntxd[i] = sctx->isc_ntxd_min[i];
}
if (scctx->isc_ntxd[i] > sctx->isc_ntxd_max[i]) {
device_printf(dev, "ntxd%d: %d greater than ntxd_max %d - resetting to max\n",
i, scctx->isc_ntxd[i], sctx->isc_ntxd_max[i]);
scctx->isc_ntxd[i] = sctx->isc_ntxd_max[i];
}
}
if ((err = IFDI_ATTACH_PRE(ctx)) != 0) {
device_printf(dev, "IFDI_ATTACH_PRE failed %d\n", err);
return (err);
}
_iflib_pre_assert(scctx);
ctx->ifc_txrx = *scctx->isc_txrx;
#ifdef INVARIANTS
MPASS(scctx->isc_capenable);
if (scctx->isc_capenable & IFCAP_TXCSUM)
MPASS(scctx->isc_tx_csum_flags);
#endif
if_setcapabilities(ifp, scctx->isc_capenable | IFCAP_HWSTATS);
if_setcapenable(ifp, scctx->isc_capenable | IFCAP_HWSTATS);
if (scctx->isc_ntxqsets == 0 || (scctx->isc_ntxqsets_max && scctx->isc_ntxqsets_max < scctx->isc_ntxqsets))
scctx->isc_ntxqsets = scctx->isc_ntxqsets_max;
if (scctx->isc_nrxqsets == 0 || (scctx->isc_nrxqsets_max && scctx->isc_nrxqsets_max < scctx->isc_nrxqsets))
scctx->isc_nrxqsets = scctx->isc_nrxqsets_max;
#ifdef ACPI_DMAR
if (dmar_get_dma_tag(device_get_parent(dev), dev) != NULL)
ctx->ifc_flags |= IFC_DMAR;
#elif !(defined(__i386__) || defined(__amd64__))
/* set unconditionally for !x86 */
ctx->ifc_flags |= IFC_DMAR;
#endif
msix_bar = scctx->isc_msix_bar;
main_txq = (sctx->isc_flags & IFLIB_HAS_TXCQ) ? 1 : 0;
main_rxq = (sctx->isc_flags & IFLIB_HAS_RXCQ) ? 1 : 0;
/* XXX change for per-queue sizes */
device_printf(dev, "using %d tx descriptors and %d rx descriptors\n",
scctx->isc_ntxd[main_txq], scctx->isc_nrxd[main_rxq]);
for (i = 0; i < sctx->isc_nrxqs; i++) {
if (!powerof2(scctx->isc_nrxd[i])) {
/* round down instead? */
device_printf(dev, "# rx descriptors must be a power of 2\n");
err = EINVAL;
goto fail;
}
}
for (i = 0; i < sctx->isc_ntxqs; i++) {
if (!powerof2(scctx->isc_ntxd[i])) {
device_printf(dev,
"# tx descriptors must be a power of 2");
err = EINVAL;
goto fail;
}
}
if (scctx->isc_tx_nsegments > scctx->isc_ntxd[main_txq] /
MAX_SINGLE_PACKET_FRACTION)
scctx->isc_tx_nsegments = max(1, scctx->isc_ntxd[main_txq] /
MAX_SINGLE_PACKET_FRACTION);
if (scctx->isc_tx_tso_segments_max > scctx->isc_ntxd[main_txq] /
MAX_SINGLE_PACKET_FRACTION)
scctx->isc_tx_tso_segments_max = max(1,
scctx->isc_ntxd[main_txq] / MAX_SINGLE_PACKET_FRACTION);
/*
* Protect the stack against modern hardware
*/
if (scctx->isc_tx_tso_size_max > FREEBSD_TSO_SIZE_MAX)
scctx->isc_tx_tso_size_max = FREEBSD_TSO_SIZE_MAX;
/* TSO parameters - dig these out of the data sheet - simply correspond to tag setup */
ifp->if_hw_tsomaxsegcount = scctx->isc_tx_tso_segments_max;
ifp->if_hw_tsomax = scctx->isc_tx_tso_size_max;
ifp->if_hw_tsomaxsegsize = scctx->isc_tx_tso_segsize_max;
if (scctx->isc_rss_table_size == 0)
scctx->isc_rss_table_size = 64;
scctx->isc_rss_table_mask = scctx->isc_rss_table_size-1;
GROUPTASK_INIT(&ctx->ifc_admin_task, 0, _task_fn_admin, ctx);
/* XXX format name */
taskqgroup_attach(qgroup_if_config_tqg, &ctx->ifc_admin_task, ctx, -1, "admin");
/* Set up cpu set. If it fails, use the set of all CPUs. */
if (bus_get_cpus(dev, INTR_CPUS, sizeof(ctx->ifc_cpus), &ctx->ifc_cpus) != 0) {
device_printf(dev, "Unable to fetch CPU list\n");
CPU_COPY(&all_cpus, &ctx->ifc_cpus);
}
MPASS(CPU_COUNT(&ctx->ifc_cpus) > 0);
/*
** Now setup MSI or MSI/X, should
** return us the number of supported
** vectors. (Will be 1 for MSI)
*/
if (sctx->isc_flags & IFLIB_SKIP_MSIX) {
msix = scctx->isc_vectors;
} else if (scctx->isc_msix_bar != 0)
/*
* The simple fact that isc_msix_bar is not 0 does not mean we
* we have a good value there that is known to work.
*/
msix = iflib_msix_init(ctx);
else {
scctx->isc_vectors = 1;
scctx->isc_ntxqsets = 1;
scctx->isc_nrxqsets = 1;
scctx->isc_intr = IFLIB_INTR_LEGACY;
msix = 0;
}
/* Get memory for the station queues */
if ((err = iflib_queues_alloc(ctx))) {
device_printf(dev, "Unable to allocate queue memory\n");
goto fail;
}
if ((err = iflib_qset_structures_setup(ctx))) {
device_printf(dev, "qset structure setup failed %d\n", err);
goto fail_queues;
}
/*
* Group taskqueues aren't properly set up until SMP is started,
* so we disable interrupts until we can handle them post
* SI_SUB_SMP.
*
* XXX: disabling interrupts doesn't actually work, at least for
* the non-MSI case. When they occur before SI_SUB_SMP completes,
* we do null handling and depend on this not causing too large an
* interrupt storm.
*/
IFDI_INTR_DISABLE(ctx);
if (msix > 1 && (err = IFDI_MSIX_INTR_ASSIGN(ctx, msix)) != 0) {
device_printf(dev, "IFDI_MSIX_INTR_ASSIGN failed %d\n", err);
goto fail_intr_free;
}
if (msix <= 1) {
rid = 0;
if (scctx->isc_intr == IFLIB_INTR_MSI) {
MPASS(msix == 1);
rid = 1;
}
if ((err = iflib_legacy_setup(ctx, ctx->isc_legacy_intr, ctx->ifc_softc, &rid, "irq0")) != 0) {
device_printf(dev, "iflib_legacy_setup failed %d\n", err);
goto fail_intr_free;
}
}
ether_ifattach(ctx->ifc_ifp, ctx->ifc_mac);
if ((err = IFDI_ATTACH_POST(ctx)) != 0) {
device_printf(dev, "IFDI_ATTACH_POST failed %d\n", err);
goto fail_detach;
}
if ((err = iflib_netmap_attach(ctx))) {
device_printf(ctx->ifc_dev, "netmap attach failed: %d\n", err);
goto fail_detach;
}
*ctxp = ctx;
if_setgetcounterfn(ctx->ifc_ifp, iflib_if_get_counter);
iflib_add_device_sysctl_post(ctx);
ctx->ifc_flags |= IFC_INIT_DONE;
return (0);
fail_detach:
ether_ifdetach(ctx->ifc_ifp);
fail_intr_free:
if (scctx->isc_intr == IFLIB_INTR_MSIX || scctx->isc_intr == IFLIB_INTR_MSI)
pci_release_msi(ctx->ifc_dev);
fail_queues:
/* XXX free queues */
fail:
IFDI_DETACH(ctx);
return (err);
}
int
iflib_device_attach(device_t dev)
{
if_ctx_t ctx;
if_shared_ctx_t sctx;
if ((sctx = DEVICE_REGISTER(dev)) == NULL || sctx->isc_magic != IFLIB_MAGIC)
return (ENOTSUP);
pci_enable_busmaster(dev);
return (iflib_device_register(dev, NULL, sctx, &ctx));
}
int
iflib_device_deregister(if_ctx_t ctx)
{
if_t ifp = ctx->ifc_ifp;
iflib_txq_t txq;
iflib_rxq_t rxq;
device_t dev = ctx->ifc_dev;
int i, j;
struct taskqgroup *tqg;
iflib_fl_t fl;
/* Make sure VLANS are not using driver */
if (if_vlantrunkinuse(ifp)) {
device_printf(dev,"Vlan in use, detach first\n");
return (EBUSY);
}
CTX_LOCK(ctx);
ctx->ifc_in_detach = 1;
iflib_stop(ctx);
CTX_UNLOCK(ctx);
/* Unregister VLAN events */
if (ctx->ifc_vlan_attach_event != NULL)
EVENTHANDLER_DEREGISTER(vlan_config, ctx->ifc_vlan_attach_event);
if (ctx->ifc_vlan_detach_event != NULL)
EVENTHANDLER_DEREGISTER(vlan_unconfig, ctx->ifc_vlan_detach_event);
iflib_netmap_detach(ifp);
ether_ifdetach(ifp);
/* ether_ifdetach calls if_qflush - lock must be destroy afterwards*/
CTX_LOCK_DESTROY(ctx);
if (ctx->ifc_led_dev != NULL)
led_destroy(ctx->ifc_led_dev);
/* XXX drain any dependent tasks */
tqg = qgroup_if_io_tqg;
for (txq = ctx->ifc_txqs, i = 0; i < NTXQSETS(ctx); i++, txq++) {
callout_drain(&txq->ift_timer);
if (txq->ift_task.gt_uniq != NULL)
taskqgroup_detach(tqg, &txq->ift_task);
}
for (i = 0, rxq = ctx->ifc_rxqs; i < NRXQSETS(ctx); i++, rxq++) {
if (rxq->ifr_task.gt_uniq != NULL)
taskqgroup_detach(tqg, &rxq->ifr_task);
for (j = 0, fl = rxq->ifr_fl; j < rxq->ifr_nfl; j++, fl++)
free(fl->ifl_rx_bitmap, M_IFLIB);
}
tqg = qgroup_if_config_tqg;
if (ctx->ifc_admin_task.gt_uniq != NULL)
taskqgroup_detach(tqg, &ctx->ifc_admin_task);
if (ctx->ifc_vflr_task.gt_uniq != NULL)
taskqgroup_detach(tqg, &ctx->ifc_vflr_task);
IFDI_DETACH(ctx);
device_set_softc(ctx->ifc_dev, NULL);
if (ctx->ifc_softc_ctx.isc_intr != IFLIB_INTR_LEGACY) {
pci_release_msi(dev);
}
if (ctx->ifc_softc_ctx.isc_intr != IFLIB_INTR_MSIX) {
iflib_irq_free(ctx, &ctx->ifc_legacy_irq);
}
if (ctx->ifc_msix_mem != NULL) {
bus_release_resource(ctx->ifc_dev, SYS_RES_MEMORY,
ctx->ifc_softc_ctx.isc_msix_bar, ctx->ifc_msix_mem);
ctx->ifc_msix_mem = NULL;
}
bus_generic_detach(dev);
if_free(ifp);
iflib_tx_structures_free(ctx);
iflib_rx_structures_free(ctx);
if (ctx->ifc_flags & IFC_SC_ALLOCATED)
free(ctx->ifc_softc, M_IFLIB);
free(ctx, M_IFLIB);
return (0);
}
int
iflib_device_detach(device_t dev)
{
if_ctx_t ctx = device_get_softc(dev);
return (iflib_device_deregister(ctx));
}
int
iflib_device_suspend(device_t dev)
{
if_ctx_t ctx = device_get_softc(dev);
CTX_LOCK(ctx);
IFDI_SUSPEND(ctx);
CTX_UNLOCK(ctx);
return bus_generic_suspend(dev);
}
int
iflib_device_shutdown(device_t dev)
{
if_ctx_t ctx = device_get_softc(dev);
CTX_LOCK(ctx);
IFDI_SHUTDOWN(ctx);
CTX_UNLOCK(ctx);
return bus_generic_suspend(dev);
}
int
iflib_device_resume(device_t dev)
{
if_ctx_t ctx = device_get_softc(dev);
iflib_txq_t txq = ctx->ifc_txqs;
CTX_LOCK(ctx);
IFDI_RESUME(ctx);
iflib_init_locked(ctx);
CTX_UNLOCK(ctx);
for (int i = 0; i < NTXQSETS(ctx); i++, txq++)
iflib_txq_check_drain(txq, IFLIB_RESTART_BUDGET);
return (bus_generic_resume(dev));
}
int
iflib_device_iov_init(device_t dev, uint16_t num_vfs, const nvlist_t *params)
{
int error;
if_ctx_t ctx = device_get_softc(dev);
CTX_LOCK(ctx);
error = IFDI_IOV_INIT(ctx, num_vfs, params);
CTX_UNLOCK(ctx);
return (error);
}
void
iflib_device_iov_uninit(device_t dev)
{
if_ctx_t ctx = device_get_softc(dev);
CTX_LOCK(ctx);
IFDI_IOV_UNINIT(ctx);
CTX_UNLOCK(ctx);
}
int
iflib_device_iov_add_vf(device_t dev, uint16_t vfnum, const nvlist_t *params)
{
int error;
if_ctx_t ctx = device_get_softc(dev);
CTX_LOCK(ctx);
error = IFDI_IOV_VF_ADD(ctx, vfnum, params);
CTX_UNLOCK(ctx);
return (error);
}
/*********************************************************************
*
* MODULE FUNCTION DEFINITIONS
*
**********************************************************************/
/*
* - Start a fast taskqueue thread for each core
* - Start a taskqueue for control operations
*/
static int
iflib_module_init(void)
{
return (0);
}
static int
iflib_module_event_handler(module_t mod, int what, void *arg)
{
int err;
switch (what) {
case MOD_LOAD:
if ((err = iflib_module_init()) != 0)
return (err);
break;
case MOD_UNLOAD:
return (EBUSY);
default:
return (EOPNOTSUPP);
}
return (0);
}
/*********************************************************************
*
* PUBLIC FUNCTION DEFINITIONS
* ordered as in iflib.h
*
**********************************************************************/
static void
_iflib_assert(if_shared_ctx_t sctx)
{
MPASS(sctx->isc_tx_maxsize);
MPASS(sctx->isc_tx_maxsegsize);
MPASS(sctx->isc_rx_maxsize);
MPASS(sctx->isc_rx_nsegments);
MPASS(sctx->isc_rx_maxsegsize);
MPASS(sctx->isc_nrxd_min[0]);
MPASS(sctx->isc_nrxd_max[0]);
MPASS(sctx->isc_nrxd_default[0]);
MPASS(sctx->isc_ntxd_min[0]);
MPASS(sctx->isc_ntxd_max[0]);
MPASS(sctx->isc_ntxd_default[0]);
}
static void
_iflib_pre_assert(if_softc_ctx_t scctx)
{
MPASS(scctx->isc_txrx->ift_txd_encap);
MPASS(scctx->isc_txrx->ift_txd_flush);
MPASS(scctx->isc_txrx->ift_txd_credits_update);
MPASS(scctx->isc_txrx->ift_rxd_available);
MPASS(scctx->isc_txrx->ift_rxd_pkt_get);
MPASS(scctx->isc_txrx->ift_rxd_refill);
MPASS(scctx->isc_txrx->ift_rxd_flush);
}
static int
iflib_register(if_ctx_t ctx)
{
if_shared_ctx_t sctx = ctx->ifc_sctx;
driver_t *driver = sctx->isc_driver;
device_t dev = ctx->ifc_dev;
if_t ifp;
_iflib_assert(sctx);
CTX_LOCK_INIT(ctx, device_get_nameunit(ctx->ifc_dev));
ifp = ctx->ifc_ifp = if_gethandle(IFT_ETHER);
if (ifp == NULL) {
device_printf(dev, "can not allocate ifnet structure\n");
return (ENOMEM);
}
/*
* Initialize our context's device specific methods
*/
kobj_init((kobj_t) ctx, (kobj_class_t) driver);
kobj_class_compile((kobj_class_t) driver);
driver->refs++;
if_initname(ifp, device_get_name(dev), device_get_unit(dev));
if_setsoftc(ifp, ctx);
if_setdev(ifp, dev);
if_setinitfn(ifp, iflib_if_init);
if_setioctlfn(ifp, iflib_if_ioctl);
if_settransmitfn(ifp, iflib_if_transmit);
if_setqflushfn(ifp, iflib_if_qflush);
if_setflags(ifp, IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST);
ctx->ifc_vlan_attach_event =
EVENTHANDLER_REGISTER(vlan_config, iflib_vlan_register, ctx,
EVENTHANDLER_PRI_FIRST);
ctx->ifc_vlan_detach_event =
EVENTHANDLER_REGISTER(vlan_unconfig, iflib_vlan_unregister, ctx,
EVENTHANDLER_PRI_FIRST);
ifmedia_init(&ctx->ifc_media, IFM_IMASK,
iflib_media_change, iflib_media_status);
return (0);
}
static int
iflib_queues_alloc(if_ctx_t ctx)
{
if_shared_ctx_t sctx = ctx->ifc_sctx;
if_softc_ctx_t scctx = &ctx->ifc_softc_ctx;
device_t dev = ctx->ifc_dev;
int nrxqsets = scctx->isc_nrxqsets;
int ntxqsets = scctx->isc_ntxqsets;
iflib_txq_t txq;
iflib_rxq_t rxq;
iflib_fl_t fl = NULL;
int i, j, cpu, err, txconf, rxconf;
iflib_dma_info_t ifdip;
uint32_t *rxqsizes = scctx->isc_rxqsizes;
uint32_t *txqsizes = scctx->isc_txqsizes;
uint8_t nrxqs = sctx->isc_nrxqs;
uint8_t ntxqs = sctx->isc_ntxqs;
int nfree_lists = sctx->isc_nfl ? sctx->isc_nfl : 1;
caddr_t *vaddrs;
uint64_t *paddrs;
struct ifmp_ring **brscp;
KASSERT(ntxqs > 0, ("number of queues per qset must be at least 1"));
KASSERT(nrxqs > 0, ("number of queues per qset must be at least 1"));
brscp = NULL;
txq = NULL;
rxq = NULL;
/* Allocate the TX ring struct memory */
if (!(txq =
(iflib_txq_t) malloc(sizeof(struct iflib_txq) *
ntxqsets, M_IFLIB, M_NOWAIT | M_ZERO))) {
device_printf(dev, "Unable to allocate TX ring memory\n");
err = ENOMEM;
goto fail;
}
/* Now allocate the RX */
if (!(rxq =
(iflib_rxq_t) malloc(sizeof(struct iflib_rxq) *
nrxqsets, M_IFLIB, M_NOWAIT | M_ZERO))) {
device_printf(dev, "Unable to allocate RX ring memory\n");
err = ENOMEM;
goto rx_fail;
}
ctx->ifc_txqs = txq;
ctx->ifc_rxqs = rxq;
/*
* XXX handle allocation failure
*/
for (txconf = i = 0, cpu = CPU_FIRST(); i < ntxqsets; i++, txconf++, txq++, cpu = CPU_NEXT(cpu)) {
/* Set up some basics */
if ((ifdip = malloc(sizeof(struct iflib_dma_info) * ntxqs, M_IFLIB, M_WAITOK|M_ZERO)) == NULL) {
device_printf(dev, "failed to allocate iflib_dma_info\n");
err = ENOMEM;
goto err_tx_desc;
}
txq->ift_ifdi = ifdip;
for (j = 0; j < ntxqs; j++, ifdip++) {
if (iflib_dma_alloc(ctx, txqsizes[j], ifdip, BUS_DMA_NOWAIT)) {
device_printf(dev, "Unable to allocate Descriptor memory\n");
err = ENOMEM;
goto err_tx_desc;
}
txq->ift_txd_size[j] = scctx->isc_txd_size[j];
bzero((void *)ifdip->idi_vaddr, txqsizes[j]);
}
txq->ift_ctx = ctx;
txq->ift_id = i;
if (sctx->isc_flags & IFLIB_HAS_TXCQ) {
txq->ift_br_offset = 1;
} else {
txq->ift_br_offset = 0;
}
/* XXX fix this */
txq->ift_timer.c_cpu = cpu;
if (iflib_txsd_alloc(txq)) {
device_printf(dev, "Critical Failure setting up TX buffers\n");
err = ENOMEM;
goto err_tx_desc;
}
/* Initialize the TX lock */
snprintf(txq->ift_mtx_name, MTX_NAME_LEN, "%s:tx(%d):callout",
device_get_nameunit(dev), txq->ift_id);
mtx_init(&txq->ift_mtx, txq->ift_mtx_name, NULL, MTX_DEF);
callout_init_mtx(&txq->ift_timer, &txq->ift_mtx, 0);
snprintf(txq->ift_db_mtx_name, MTX_NAME_LEN, "%s:tx(%d):db",
device_get_nameunit(dev), txq->ift_id);
err = ifmp_ring_alloc(&txq->ift_br, 2048, txq, iflib_txq_drain,
iflib_txq_can_drain, M_IFLIB, M_WAITOK);
if (err) {
/* XXX free any allocated rings */
device_printf(dev, "Unable to allocate buf_ring\n");
goto err_tx_desc;
}
}
for (rxconf = i = 0; i < nrxqsets; i++, rxconf++, rxq++) {
/* Set up some basics */
if ((ifdip = malloc(sizeof(struct iflib_dma_info) * nrxqs, M_IFLIB, M_WAITOK|M_ZERO)) == NULL) {
device_printf(dev, "failed to allocate iflib_dma_info\n");
err = ENOMEM;
goto err_tx_desc;
}
rxq->ifr_ifdi = ifdip;
/* XXX this needs to be changed if #rx queues != #tx queues */
rxq->ifr_ntxqirq = 1;
rxq->ifr_txqid[0] = i;
for (j = 0; j < nrxqs; j++, ifdip++) {
if (iflib_dma_alloc(ctx, rxqsizes[j], ifdip, BUS_DMA_NOWAIT)) {
device_printf(dev, "Unable to allocate Descriptor memory\n");
err = ENOMEM;
goto err_tx_desc;
}
bzero((void *)ifdip->idi_vaddr, rxqsizes[j]);
}
rxq->ifr_ctx = ctx;
rxq->ifr_id = i;
if (sctx->isc_flags & IFLIB_HAS_RXCQ) {
rxq->ifr_fl_offset = 1;
} else {
rxq->ifr_fl_offset = 0;
}
rxq->ifr_nfl = nfree_lists;
if (!(fl =
(iflib_fl_t) malloc(sizeof(struct iflib_fl) * nfree_lists, M_IFLIB, M_NOWAIT | M_ZERO))) {
device_printf(dev, "Unable to allocate free list memory\n");
err = ENOMEM;
goto err_tx_desc;
}
rxq->ifr_fl = fl;
for (j = 0; j < nfree_lists; j++) {
fl[j].ifl_rxq = rxq;
fl[j].ifl_id = j;
fl[j].ifl_ifdi = &rxq->ifr_ifdi[j + rxq->ifr_fl_offset];
fl[j].ifl_rxd_size = scctx->isc_rxd_size[j];
}
/* Allocate receive buffers for the ring*/
if (iflib_rxsd_alloc(rxq)) {
device_printf(dev,
"Critical Failure setting up receive buffers\n");
err = ENOMEM;
goto err_rx_desc;
}
for (j = 0, fl = rxq->ifr_fl; j < rxq->ifr_nfl; j++, fl++)
fl->ifl_rx_bitmap = bit_alloc(fl->ifl_size, M_IFLIB, M_WAITOK|M_ZERO);
}
/* TXQs */
vaddrs = malloc(sizeof(caddr_t)*ntxqsets*ntxqs, M_IFLIB, M_WAITOK);
paddrs = malloc(sizeof(uint64_t)*ntxqsets*ntxqs, M_IFLIB, M_WAITOK);
for (i = 0; i < ntxqsets; i++) {
iflib_dma_info_t di = ctx->ifc_txqs[i].ift_ifdi;
for (j = 0; j < ntxqs; j++, di++) {
vaddrs[i*ntxqs + j] = di->idi_vaddr;
paddrs[i*ntxqs + j] = di->idi_paddr;
}
}
if ((err = IFDI_TX_QUEUES_ALLOC(ctx, vaddrs, paddrs, ntxqs, ntxqsets)) != 0) {
device_printf(ctx->ifc_dev, "device queue allocation failed\n");
iflib_tx_structures_free(ctx);
free(vaddrs, M_IFLIB);
free(paddrs, M_IFLIB);
goto err_rx_desc;
}
free(vaddrs, M_IFLIB);
free(paddrs, M_IFLIB);
/* RXQs */
vaddrs = malloc(sizeof(caddr_t)*nrxqsets*nrxqs, M_IFLIB, M_WAITOK);
paddrs = malloc(sizeof(uint64_t)*nrxqsets*nrxqs, M_IFLIB, M_WAITOK);
for (i = 0; i < nrxqsets; i++) {
iflib_dma_info_t di = ctx->ifc_rxqs[i].ifr_ifdi;
for (j = 0; j < nrxqs; j++, di++) {
vaddrs[i*nrxqs + j] = di->idi_vaddr;
paddrs[i*nrxqs + j] = di->idi_paddr;
}
}
if ((err = IFDI_RX_QUEUES_ALLOC(ctx, vaddrs, paddrs, nrxqs, nrxqsets)) != 0) {
device_printf(ctx->ifc_dev, "device queue allocation failed\n");
iflib_tx_structures_free(ctx);
free(vaddrs, M_IFLIB);
free(paddrs, M_IFLIB);
goto err_rx_desc;
}
free(vaddrs, M_IFLIB);
free(paddrs, M_IFLIB);
return (0);
/* XXX handle allocation failure changes */
err_rx_desc:
err_tx_desc:
if (ctx->ifc_rxqs != NULL)
free(ctx->ifc_rxqs, M_IFLIB);
ctx->ifc_rxqs = NULL;
if (ctx->ifc_txqs != NULL)
free(ctx->ifc_txqs, M_IFLIB);
ctx->ifc_txqs = NULL;
rx_fail:
if (brscp != NULL)
free(brscp, M_IFLIB);
if (rxq != NULL)
free(rxq, M_IFLIB);
if (txq != NULL)
free(txq, M_IFLIB);
fail:
return (err);
}
static int
iflib_tx_structures_setup(if_ctx_t ctx)
{
iflib_txq_t txq = ctx->ifc_txqs;
int i;
for (i = 0; i < NTXQSETS(ctx); i++, txq++)
iflib_txq_setup(txq);
return (0);
}
static void
iflib_tx_structures_free(if_ctx_t ctx)
{
iflib_txq_t txq = ctx->ifc_txqs;
int i, j;
for (i = 0; i < NTXQSETS(ctx); i++, txq++) {
iflib_txq_destroy(txq);
for (j = 0; j < ctx->ifc_nhwtxqs; j++)
iflib_dma_free(&txq->ift_ifdi[j]);
}
free(ctx->ifc_txqs, M_IFLIB);
ctx->ifc_txqs = NULL;
IFDI_QUEUES_FREE(ctx);
}
/*********************************************************************
*
* Initialize all receive rings.
*
**********************************************************************/
static int
iflib_rx_structures_setup(if_ctx_t ctx)
{
iflib_rxq_t rxq = ctx->ifc_rxqs;
int q;
#if defined(INET6) || defined(INET)
int i, err;
#endif
for (q = 0; q < ctx->ifc_softc_ctx.isc_nrxqsets; q++, rxq++) {
#if defined(INET6) || defined(INET)
tcp_lro_free(&rxq->ifr_lc);
if ((err = tcp_lro_init_args(&rxq->ifr_lc, ctx->ifc_ifp,
TCP_LRO_ENTRIES, min(1024,
ctx->ifc_softc_ctx.isc_nrxd[rxq->ifr_fl_offset]))) != 0) {
device_printf(ctx->ifc_dev, "LRO Initialization failed!\n");
goto fail;
}
rxq->ifr_lro_enabled = TRUE;
#endif
IFDI_RXQ_SETUP(ctx, rxq->ifr_id);
}
return (0);
#if defined(INET6) || defined(INET)
fail:
/*
* Free RX software descriptors allocated so far, we will only handle
* the rings that completed, the failing case will have
* cleaned up for itself. 'q' failed, so its the terminus.
*/
rxq = ctx->ifc_rxqs;
for (i = 0; i < q; ++i, rxq++) {
iflib_rx_sds_free(rxq);
rxq->ifr_cq_gen = rxq->ifr_cq_cidx = rxq->ifr_cq_pidx = 0;
}
return (err);
#endif
}
/*********************************************************************
*
* Free all receive rings.
*
**********************************************************************/
static void
iflib_rx_structures_free(if_ctx_t ctx)
{
iflib_rxq_t rxq = ctx->ifc_rxqs;
for (int i = 0; i < ctx->ifc_softc_ctx.isc_nrxqsets; i++, rxq++) {
iflib_rx_sds_free(rxq);
}
}
static int
iflib_qset_structures_setup(if_ctx_t ctx)
{
int err;
if ((err = iflib_tx_structures_setup(ctx)) != 0)
return (err);
if ((err = iflib_rx_structures_setup(ctx)) != 0) {
device_printf(ctx->ifc_dev, "iflib_rx_structures_setup failed: %d\n", err);
iflib_tx_structures_free(ctx);
iflib_rx_structures_free(ctx);
}
return (err);
}
int
iflib_irq_alloc(if_ctx_t ctx, if_irq_t irq, int rid,
driver_filter_t filter, void *filter_arg, driver_intr_t handler, void *arg, char *name)
{
return (_iflib_irq_alloc(ctx, irq, rid, filter, handler, arg, name));
}
#ifdef SMP
static int
find_nth(if_ctx_t ctx, int qid)
{
cpuset_t cpus;
int i, cpuid, eqid, count;
CPU_COPY(&ctx->ifc_cpus, &cpus);
count = CPU_COUNT(&cpus);
eqid = qid % count;
/* clear up to the qid'th bit */
for (i = 0; i < eqid; i++) {
cpuid = CPU_FFS(&cpus);
MPASS(cpuid != 0);
CPU_CLR(cpuid-1, &cpus);
}
cpuid = CPU_FFS(&cpus);
MPASS(cpuid != 0);
return (cpuid-1);
}
#ifdef SCHED_ULE
extern struct cpu_group *cpu_top; /* CPU topology */
static int
find_child_with_core(int cpu, struct cpu_group *grp)
{
int i;
if (grp->cg_children == 0)
return -1;
MPASS(grp->cg_child);
for (i = 0; i < grp->cg_children; i++) {
if (CPU_ISSET(cpu, &grp->cg_child[i].cg_mask))
return i;
}
return -1;
}
/*
* Find the nth thread on the specified core
*/
static int
find_thread(int cpu, int thread_num)
{
struct cpu_group *grp;
int i;
cpuset_t cs;
grp = cpu_top;
if (grp == NULL)
return cpu;
i = 0;
while ((i = find_child_with_core(cpu, grp)) != -1) {
/* If the child only has one cpu, don't descend */
if (grp->cg_child[i].cg_count <= 1)
break;
grp = &grp->cg_child[i];
}
/* If they don't share at least an L2 cache, use the same CPU */
if (grp->cg_level > CG_SHARE_L2 || grp->cg_level == CG_SHARE_NONE)
return cpu;
/* Now pick one */
CPU_COPY(&grp->cg_mask, &cs);
for (i = thread_num % grp->cg_count; i > 0; i--) {
MPASS(CPU_FFS(&cs));
CPU_CLR(CPU_FFS(&cs) - 1, &cs);
}
MPASS(CPU_FFS(&cs));
return CPU_FFS(&cs) - 1;
}
#else
static int
find_thread(int cpu, int thread_num __unused)
{
return cpu_id
}
#endif
static int
get_thread_num(if_ctx_t ctx, iflib_intr_type_t type, int qid)
{
switch (type) {
case IFLIB_INTR_TX:
/* TX queues get threads on the same core as the corresponding RX queue */
/* XXX handle multiple RX threads per core and more than two threads per core */
return qid / CPU_COUNT(&ctx->ifc_cpus) + 1;
case IFLIB_INTR_RX:
case IFLIB_INTR_RXTX:
/* RX queues get the first thread on their core */
return qid / CPU_COUNT(&ctx->ifc_cpus);
default:
return -1;
}
}
#else
#define get_thread_num(ctx, type, qid) CPU_FIRST()
#define find_thread(cpuid, tid) CPU_FIRST()
#define find_nth(ctx, gid) CPU_FIRST()
#endif
/* Just to avoid copy/paste */
static inline int
iflib_irq_set_affinity(if_ctx_t ctx, int irq, iflib_intr_type_t type, int qid,
struct grouptask *gtask, struct taskqgroup *tqg, void *uniq, char *name)
{
int cpuid;
int err, tid;
cpuid = find_nth(ctx, qid);
tid = get_thread_num(ctx, type, qid);
MPASS(tid >= 0);
cpuid = find_thread(cpuid, tid);
err = taskqgroup_attach_cpu(tqg, gtask, uniq, cpuid, irq, name);
if (err) {
device_printf(ctx->ifc_dev, "taskqgroup_attach_cpu failed %d\n", err);
return (err);
}
#ifdef notyet
if (cpuid > ctx->ifc_cpuid_highest)
ctx->ifc_cpuid_highest = cpuid;
#endif
MPASS(gtask->gt_taskqueue != NULL);
return 0;
}
int
iflib_irq_alloc_generic(if_ctx_t ctx, if_irq_t irq, int rid,
iflib_intr_type_t type, driver_filter_t *filter,
void *filter_arg, int qid, char *name)
{
struct grouptask *gtask;
struct taskqgroup *tqg;
iflib_filter_info_t info;
gtask_fn_t *fn;
int tqrid, err;
driver_filter_t *intr_fast;
void *q;
info = &ctx->ifc_filter_info;
tqrid = rid;
switch (type) {
/* XXX merge tx/rx for netmap? */
case IFLIB_INTR_TX:
q = &ctx->ifc_txqs[qid];
info = &ctx->ifc_txqs[qid].ift_filter_info;
gtask = &ctx->ifc_txqs[qid].ift_task;
tqg = qgroup_if_io_tqg;
fn = _task_fn_tx;
intr_fast = iflib_fast_intr;
GROUPTASK_INIT(gtask, 0, fn, q);
break;
case IFLIB_INTR_RX:
q = &ctx->ifc_rxqs[qid];
info = &ctx->ifc_rxqs[qid].ifr_filter_info;
gtask = &ctx->ifc_rxqs[qid].ifr_task;
tqg = qgroup_if_io_tqg;
fn = _task_fn_rx;
intr_fast = iflib_fast_intr;
GROUPTASK_INIT(gtask, 0, fn, q);
break;
case IFLIB_INTR_RXTX:
q = &ctx->ifc_rxqs[qid];
info = &ctx->ifc_rxqs[qid].ifr_filter_info;
gtask = &ctx->ifc_rxqs[qid].ifr_task;
tqg = qgroup_if_io_tqg;
fn = _task_fn_rx;
intr_fast = iflib_fast_intr_rxtx;
GROUPTASK_INIT(gtask, 0, fn, q);
break;
case IFLIB_INTR_ADMIN:
q = ctx;
tqrid = -1;
info = &ctx->ifc_filter_info;
gtask = &ctx->ifc_admin_task;
tqg = qgroup_if_config_tqg;
fn = _task_fn_admin;
intr_fast = iflib_fast_intr_ctx;
break;
default:
panic("unknown net intr type");
}
info->ifi_filter = filter;
info->ifi_filter_arg = filter_arg;
info->ifi_task = gtask;
info->ifi_ctx = q;
err = _iflib_irq_alloc(ctx, irq, rid, intr_fast, NULL, info, name);
if (err != 0) {
device_printf(ctx->ifc_dev, "_iflib_irq_alloc failed %d\n", err);
return (err);
}
if (type == IFLIB_INTR_ADMIN)
return (0);
if (tqrid != -1) {
err = iflib_irq_set_affinity(ctx, rman_get_start(irq->ii_res), type, qid, gtask, tqg, q, name);
if (err)
return (err);
} else {
taskqgroup_attach(tqg, gtask, q, rman_get_start(irq->ii_res), name);
}
return (0);
}
void
iflib_softirq_alloc_generic(if_ctx_t ctx, if_irq_t irq, iflib_intr_type_t type, void *arg, int qid, char *name)
{
struct grouptask *gtask;
struct taskqgroup *tqg;
gtask_fn_t *fn;
void *q;
int irq_num = -1;
int err;
switch (type) {
case IFLIB_INTR_TX:
q = &ctx->ifc_txqs[qid];
gtask = &ctx->ifc_txqs[qid].ift_task;
tqg = qgroup_if_io_tqg;
fn = _task_fn_tx;
if (irq != NULL)
irq_num = rman_get_start(irq->ii_res);
break;
case IFLIB_INTR_RX:
q = &ctx->ifc_rxqs[qid];
gtask = &ctx->ifc_rxqs[qid].ifr_task;
tqg = qgroup_if_io_tqg;
fn = _task_fn_rx;
if (irq != NULL)
irq_num = rman_get_start(irq->ii_res);
break;
case IFLIB_INTR_IOV:
q = ctx;
gtask = &ctx->ifc_vflr_task;
tqg = qgroup_if_config_tqg;
fn = _task_fn_iov;
break;
default:
panic("unknown net intr type");
}
GROUPTASK_INIT(gtask, 0, fn, q);
if (irq_num != -1) {
err = iflib_irq_set_affinity(ctx, irq_num, type, qid, gtask, tqg, q, name);
if (err)
taskqgroup_attach(tqg, gtask, q, irq_num, name);
}
else {
taskqgroup_attach(tqg, gtask, q, irq_num, name);
}
}
void
iflib_irq_free(if_ctx_t ctx, if_irq_t irq)
{
if (irq->ii_tag)
bus_teardown_intr(ctx->ifc_dev, irq->ii_res, irq->ii_tag);
if (irq->ii_res)
bus_release_resource(ctx->ifc_dev, SYS_RES_IRQ, irq->ii_rid, irq->ii_res);
}
static int
iflib_legacy_setup(if_ctx_t ctx, driver_filter_t filter, void *filter_arg, int *rid, char *name)
{
iflib_txq_t txq = ctx->ifc_txqs;
iflib_rxq_t rxq = ctx->ifc_rxqs;
if_irq_t irq = &ctx->ifc_legacy_irq;
iflib_filter_info_t info;
struct grouptask *gtask;
struct taskqgroup *tqg;
gtask_fn_t *fn;
int tqrid;
void *q;
int err;
q = &ctx->ifc_rxqs[0];
info = &rxq[0].ifr_filter_info;
gtask = &rxq[0].ifr_task;
tqg = qgroup_if_io_tqg;
tqrid = irq->ii_rid = *rid;
fn = _task_fn_rx;
ctx->ifc_flags |= IFC_LEGACY;
info->ifi_filter = filter;
info->ifi_filter_arg = filter_arg;
info->ifi_task = gtask;
info->ifi_ctx = ctx;
/* We allocate a single interrupt resource */
if ((err = _iflib_irq_alloc(ctx, irq, tqrid, iflib_fast_intr_ctx, NULL, info, name)) != 0)
return (err);
GROUPTASK_INIT(gtask, 0, fn, q);
taskqgroup_attach(tqg, gtask, q, tqrid, name);
GROUPTASK_INIT(&txq->ift_task, 0, _task_fn_tx, txq);
taskqgroup_attach(qgroup_if_io_tqg, &txq->ift_task, txq, tqrid, "tx");
return (0);
}
void
iflib_led_create(if_ctx_t ctx)
{
ctx->ifc_led_dev = led_create(iflib_led_func, ctx,
device_get_nameunit(ctx->ifc_dev));
}
void
iflib_tx_intr_deferred(if_ctx_t ctx, int txqid)
{
GROUPTASK_ENQUEUE(&ctx->ifc_txqs[txqid].ift_task);
}
void
iflib_rx_intr_deferred(if_ctx_t ctx, int rxqid)
{
GROUPTASK_ENQUEUE(&ctx->ifc_rxqs[rxqid].ifr_task);
}
void
iflib_admin_intr_deferred(if_ctx_t ctx)
{
#ifdef INVARIANTS
struct grouptask *gtask;
gtask = &ctx->ifc_admin_task;
MPASS(gtask != NULL && gtask->gt_taskqueue != NULL);
#endif
GROUPTASK_ENQUEUE(&ctx->ifc_admin_task);
}
void
iflib_iov_intr_deferred(if_ctx_t ctx)
{
GROUPTASK_ENQUEUE(&ctx->ifc_vflr_task);
}
void
iflib_io_tqg_attach(struct grouptask *gt, void *uniq, int cpu, char *name)
{
taskqgroup_attach_cpu(qgroup_if_io_tqg, gt, uniq, cpu, -1, name);
}
void
iflib_config_gtask_init(if_ctx_t ctx, struct grouptask *gtask, gtask_fn_t *fn,
char *name)
{
GROUPTASK_INIT(gtask, 0, fn, ctx);
taskqgroup_attach(qgroup_if_config_tqg, gtask, gtask, -1, name);
}
void
iflib_config_gtask_deinit(struct grouptask *gtask)
{
taskqgroup_detach(qgroup_if_config_tqg, gtask);
}
void
iflib_link_state_change(if_ctx_t ctx, int link_state, uint64_t baudrate)
{
if_t ifp = ctx->ifc_ifp;
iflib_txq_t txq = ctx->ifc_txqs;
if_setbaudrate(ifp, baudrate);
if (baudrate >= IF_Gbps(10))
ctx->ifc_flags |= IFC_PREFETCH;
/* If link down, disable watchdog */
if ((ctx->ifc_link_state == LINK_STATE_UP) && (link_state == LINK_STATE_DOWN)) {
for (int i = 0; i < ctx->ifc_softc_ctx.isc_ntxqsets; i++, txq++)
txq->ift_qstatus = IFLIB_QUEUE_IDLE;
}
ctx->ifc_link_state = link_state;
if_link_state_change(ifp, link_state);
}
static int
iflib_tx_credits_update(if_ctx_t ctx, iflib_txq_t txq)
{
int credits;
#ifdef INVARIANTS
int credits_pre = txq->ift_cidx_processed;
#endif
if (ctx->isc_txd_credits_update == NULL)
return (0);
if ((credits = ctx->isc_txd_credits_update(ctx->ifc_softc, txq->ift_id, true)) == 0)
return (0);
txq->ift_processed += credits;
txq->ift_cidx_processed += credits;
MPASS(credits_pre + credits == txq->ift_cidx_processed);
if (txq->ift_cidx_processed >= txq->ift_size)
txq->ift_cidx_processed -= txq->ift_size;
return (credits);
}
static int
iflib_rxd_avail(if_ctx_t ctx, iflib_rxq_t rxq, qidx_t cidx, qidx_t budget)
{
return (ctx->isc_rxd_available(ctx->ifc_softc, rxq->ifr_id, cidx,
budget));
}
void
iflib_add_int_delay_sysctl(if_ctx_t ctx, const char *name,
const char *description, if_int_delay_info_t info,
int offset, int value)
{
info->iidi_ctx = ctx;
info->iidi_offset = offset;
info->iidi_value = value;
SYSCTL_ADD_PROC(device_get_sysctl_ctx(ctx->ifc_dev),
SYSCTL_CHILDREN(device_get_sysctl_tree(ctx->ifc_dev)),
OID_AUTO, name, CTLTYPE_INT|CTLFLAG_RW,
info, 0, iflib_sysctl_int_delay, "I", description);
}
struct mtx *
iflib_ctx_lock_get(if_ctx_t ctx)
{
return (&ctx->ifc_mtx);
}
static int
iflib_msix_init(if_ctx_t ctx)
{
device_t dev = ctx->ifc_dev;
if_shared_ctx_t sctx = ctx->ifc_sctx;
if_softc_ctx_t scctx = &ctx->ifc_softc_ctx;
int vectors, queues, rx_queues, tx_queues, queuemsgs, msgs;
int iflib_num_tx_queues, iflib_num_rx_queues;
int err, admincnt, bar;
iflib_num_tx_queues = ctx->ifc_sysctl_ntxqs;
iflib_num_rx_queues = ctx->ifc_sysctl_nrxqs;
device_printf(dev, "msix_init qsets capped at %d\n", imax(scctx->isc_ntxqsets, scctx->isc_nrxqsets));
bar = ctx->ifc_softc_ctx.isc_msix_bar;
admincnt = sctx->isc_admin_intrcnt;
/* Override by global tuneable */
{
int i;
size_t len = sizeof(i);
err = kernel_sysctlbyname(curthread, "hw.pci.enable_msix", &i, &len, NULL, 0, NULL, 0);
if (err == 0) {
if (i == 0)
goto msi;
}
else {
device_printf(dev, "unable to read hw.pci.enable_msix.");
}
}
/* Override by tuneable */
if (scctx->isc_disable_msix)
goto msi;
/*
** When used in a virtualized environment
** PCI BUSMASTER capability may not be set
** so explicity set it here and rewrite
** the ENABLE in the MSIX control register
** at this point to cause the host to
** successfully initialize us.
*/
{
int msix_ctrl, rid;
pci_enable_busmaster(dev);
rid = 0;
if (pci_find_cap(dev, PCIY_MSIX, &rid) == 0 && rid != 0) {
rid += PCIR_MSIX_CTRL;
msix_ctrl = pci_read_config(dev, rid, 2);
msix_ctrl |= PCIM_MSIXCTRL_MSIX_ENABLE;
pci_write_config(dev, rid, msix_ctrl, 2);
} else {
device_printf(dev, "PCIY_MSIX capability not found; "
"or rid %d == 0.\n", rid);
goto msi;
}
}
/*
* bar == -1 => "trust me I know what I'm doing"
* Some drivers are for hardware that is so shoddily
* documented that no one knows which bars are which
* so the developer has to map all bars. This hack
* allows shoddy garbage to use msix in this framework.
*/
if (bar != -1) {
ctx->ifc_msix_mem = bus_alloc_resource_any(dev,
SYS_RES_MEMORY, &bar, RF_ACTIVE);
if (ctx->ifc_msix_mem == NULL) {
/* May not be enabled */
device_printf(dev, "Unable to map MSIX table \n");
goto msi;
}
}
/* First try MSI/X */
if ((msgs = pci_msix_count(dev)) == 0) { /* system has msix disabled */
device_printf(dev, "System has MSIX disabled \n");
bus_release_resource(dev, SYS_RES_MEMORY,
bar, ctx->ifc_msix_mem);
ctx->ifc_msix_mem = NULL;
goto msi;
}
#if IFLIB_DEBUG
/* use only 1 qset in debug mode */
queuemsgs = min(msgs - admincnt, 1);
#else
queuemsgs = msgs - admincnt;
#endif
#ifdef RSS
queues = imin(queuemsgs, rss_getnumbuckets());
#else
queues = queuemsgs;
#endif
queues = imin(CPU_COUNT(&ctx->ifc_cpus), queues);
device_printf(dev, "pxm cpus: %d queue msgs: %d admincnt: %d\n",
CPU_COUNT(&ctx->ifc_cpus), queuemsgs, admincnt);
#ifdef RSS
/* If we're doing RSS, clamp at the number of RSS buckets */
if (queues > rss_getnumbuckets())
queues = rss_getnumbuckets();
#endif
if (iflib_num_rx_queues > 0 && iflib_num_rx_queues < queuemsgs - admincnt)
rx_queues = iflib_num_rx_queues;
else
rx_queues = queues;
if (rx_queues > scctx->isc_nrxqsets)
rx_queues = scctx->isc_nrxqsets;
/*
* We want this to be all logical CPUs by default
*/
if (iflib_num_tx_queues > 0 && iflib_num_tx_queues < queues)
tx_queues = iflib_num_tx_queues;
else
tx_queues = mp_ncpus;
if (tx_queues > scctx->isc_ntxqsets)
tx_queues = scctx->isc_ntxqsets;
if (ctx->ifc_sysctl_qs_eq_override == 0) {
#ifdef INVARIANTS
if (tx_queues != rx_queues)
device_printf(dev, "queue equality override not set, capping rx_queues at %d and tx_queues at %d\n",
min(rx_queues, tx_queues), min(rx_queues, tx_queues));
#endif
tx_queues = min(rx_queues, tx_queues);
rx_queues = min(rx_queues, tx_queues);
}
device_printf(dev, "using %d rx queues %d tx queues \n", rx_queues, tx_queues);
vectors = rx_queues + admincnt;
if ((err = pci_alloc_msix(dev, &vectors)) == 0) {
device_printf(dev,
"Using MSIX interrupts with %d vectors\n", vectors);
scctx->isc_vectors = vectors;
scctx->isc_nrxqsets = rx_queues;
scctx->isc_ntxqsets = tx_queues;
scctx->isc_intr = IFLIB_INTR_MSIX;
return (vectors);
} else {
device_printf(dev, "failed to allocate %d msix vectors, err: %d - using MSI\n", vectors, err);
}
msi:
vectors = pci_msi_count(dev);
scctx->isc_nrxqsets = 1;
scctx->isc_ntxqsets = 1;
scctx->isc_vectors = vectors;
if (vectors == 1 && pci_alloc_msi(dev, &vectors) == 0) {
device_printf(dev,"Using an MSI interrupt\n");
scctx->isc_intr = IFLIB_INTR_MSI;
} else {
device_printf(dev,"Using a Legacy interrupt\n");
scctx->isc_intr = IFLIB_INTR_LEGACY;
}
return (vectors);
}
char * ring_states[] = { "IDLE", "BUSY", "STALLED", "ABDICATED" };
static int
mp_ring_state_handler(SYSCTL_HANDLER_ARGS)
{
int rc;
uint16_t *state = ((uint16_t *)oidp->oid_arg1);
struct sbuf *sb;
char *ring_state = "UNKNOWN";
/* XXX needed ? */
rc = sysctl_wire_old_buffer(req, 0);
MPASS(rc == 0);
if (rc != 0)
return (rc);
sb = sbuf_new_for_sysctl(NULL, NULL, 80, req);
MPASS(sb != NULL);
if (sb == NULL)
return (ENOMEM);
if (state[3] <= 3)
ring_state = ring_states[state[3]];
sbuf_printf(sb, "pidx_head: %04hd pidx_tail: %04hd cidx: %04hd state: %s",
state[0], state[1], state[2], ring_state);
rc = sbuf_finish(sb);
sbuf_delete(sb);
return(rc);
}
enum iflib_ndesc_handler {
IFLIB_NTXD_HANDLER,
IFLIB_NRXD_HANDLER,
};
static int
mp_ndesc_handler(SYSCTL_HANDLER_ARGS)
{
if_ctx_t ctx = (void *)arg1;
enum iflib_ndesc_handler type = arg2;
char buf[256] = {0};
qidx_t *ndesc;
char *p, *next;
int nqs, rc, i;
MPASS(type == IFLIB_NTXD_HANDLER || type == IFLIB_NRXD_HANDLER);
nqs = 8;
switch(type) {
case IFLIB_NTXD_HANDLER:
ndesc = ctx->ifc_sysctl_ntxds;
if (ctx->ifc_sctx)
nqs = ctx->ifc_sctx->isc_ntxqs;
break;
case IFLIB_NRXD_HANDLER:
ndesc = ctx->ifc_sysctl_nrxds;
if (ctx->ifc_sctx)
nqs = ctx->ifc_sctx->isc_nrxqs;
break;
}
if (nqs == 0)
nqs = 8;
for (i=0; i<8; i++) {
if (i >= nqs)
break;
if (i)
strcat(buf, ",");
sprintf(strchr(buf, 0), "%d", ndesc[i]);
}
rc = sysctl_handle_string(oidp, buf, sizeof(buf), req);
if (rc || req->newptr == NULL)
return rc;
for (i = 0, next = buf, p = strsep(&next, " ,"); i < 8 && p;
i++, p = strsep(&next, " ,")) {
ndesc[i] = strtoul(p, NULL, 10);
}
return(rc);
}
#define NAME_BUFLEN 32
static void
iflib_add_device_sysctl_pre(if_ctx_t ctx)
{
device_t dev = iflib_get_dev(ctx);
struct sysctl_oid_list *child, *oid_list;
struct sysctl_ctx_list *ctx_list;
struct sysctl_oid *node;
ctx_list = device_get_sysctl_ctx(dev);
child = SYSCTL_CHILDREN(device_get_sysctl_tree(dev));
ctx->ifc_sysctl_node = node = SYSCTL_ADD_NODE(ctx_list, child, OID_AUTO, "iflib",
CTLFLAG_RD, NULL, "IFLIB fields");
oid_list = SYSCTL_CHILDREN(node);
SYSCTL_ADD_STRING(ctx_list, oid_list, OID_AUTO, "driver_version",
CTLFLAG_RD, ctx->ifc_sctx->isc_driver_version, 0,
"driver version");
SYSCTL_ADD_U16(ctx_list, oid_list, OID_AUTO, "override_ntxqs",
CTLFLAG_RWTUN, &ctx->ifc_sysctl_ntxqs, 0,
"# of txqs to use, 0 => use default #");
SYSCTL_ADD_U16(ctx_list, oid_list, OID_AUTO, "override_nrxqs",
CTLFLAG_RWTUN, &ctx->ifc_sysctl_nrxqs, 0,
"# of rxqs to use, 0 => use default #");
SYSCTL_ADD_U16(ctx_list, oid_list, OID_AUTO, "override_qs_enable",
CTLFLAG_RWTUN, &ctx->ifc_sysctl_qs_eq_override, 0,
"permit #txq != #rxq");
SYSCTL_ADD_INT(ctx_list, oid_list, OID_AUTO, "disable_msix",
CTLFLAG_RWTUN, &ctx->ifc_softc_ctx.isc_disable_msix, 0,
"disable MSIX (default 0)");
SYSCTL_ADD_U16(ctx_list, oid_list, OID_AUTO, "rx_budget",
CTLFLAG_RWTUN, &ctx->ifc_sysctl_rx_budget, 0,
"set the rx budget");
/* XXX change for per-queue sizes */
SYSCTL_ADD_PROC(ctx_list, oid_list, OID_AUTO, "override_ntxds",
CTLTYPE_STRING|CTLFLAG_RWTUN, ctx, IFLIB_NTXD_HANDLER,
mp_ndesc_handler, "A",
"list of # of tx descriptors to use, 0 = use default #");
SYSCTL_ADD_PROC(ctx_list, oid_list, OID_AUTO, "override_nrxds",
CTLTYPE_STRING|CTLFLAG_RWTUN, ctx, IFLIB_NRXD_HANDLER,
mp_ndesc_handler, "A",
"list of # of rx descriptors to use, 0 = use default #");
}
static void
iflib_add_device_sysctl_post(if_ctx_t ctx)
{
if_shared_ctx_t sctx = ctx->ifc_sctx;
if_softc_ctx_t scctx = &ctx->ifc_softc_ctx;
device_t dev = iflib_get_dev(ctx);
struct sysctl_oid_list *child;
struct sysctl_ctx_list *ctx_list;
iflib_fl_t fl;
iflib_txq_t txq;
iflib_rxq_t rxq;
int i, j;
char namebuf[NAME_BUFLEN];
char *qfmt;
struct sysctl_oid *queue_node, *fl_node, *node;
struct sysctl_oid_list *queue_list, *fl_list;
ctx_list = device_get_sysctl_ctx(dev);
node = ctx->ifc_sysctl_node;
child = SYSCTL_CHILDREN(node);
if (scctx->isc_ntxqsets > 100)
qfmt = "txq%03d";
else if (scctx->isc_ntxqsets > 10)
qfmt = "txq%02d";
else
qfmt = "txq%d";
for (i = 0, txq = ctx->ifc_txqs; i < scctx->isc_ntxqsets; i++, txq++) {
snprintf(namebuf, NAME_BUFLEN, qfmt, i);
queue_node = SYSCTL_ADD_NODE(ctx_list, child, OID_AUTO, namebuf,
CTLFLAG_RD, NULL, "Queue Name");
queue_list = SYSCTL_CHILDREN(queue_node);
#if MEMORY_LOGGING
SYSCTL_ADD_QUAD(ctx_list, queue_list, OID_AUTO, "txq_dequeued",
CTLFLAG_RD,
&txq->ift_dequeued, "total mbufs freed");
SYSCTL_ADD_QUAD(ctx_list, queue_list, OID_AUTO, "txq_enqueued",
CTLFLAG_RD,
&txq->ift_enqueued, "total mbufs enqueued");
#endif
SYSCTL_ADD_QUAD(ctx_list, queue_list, OID_AUTO, "mbuf_defrag",
CTLFLAG_RD,
&txq->ift_mbuf_defrag, "# of times m_defrag was called");
SYSCTL_ADD_QUAD(ctx_list, queue_list, OID_AUTO, "m_pullups",
CTLFLAG_RD,
&txq->ift_pullups, "# of times m_pullup was called");
SYSCTL_ADD_QUAD(ctx_list, queue_list, OID_AUTO, "mbuf_defrag_failed",
CTLFLAG_RD,
&txq->ift_mbuf_defrag_failed, "# of times m_defrag failed");
SYSCTL_ADD_QUAD(ctx_list, queue_list, OID_AUTO, "no_desc_avail",
CTLFLAG_RD,
&txq->ift_no_desc_avail, "# of times no descriptors were available");
SYSCTL_ADD_QUAD(ctx_list, queue_list, OID_AUTO, "tx_map_failed",
CTLFLAG_RD,
&txq->ift_map_failed, "# of times dma map failed");
SYSCTL_ADD_QUAD(ctx_list, queue_list, OID_AUTO, "txd_encap_efbig",
CTLFLAG_RD,
&txq->ift_txd_encap_efbig, "# of times txd_encap returned EFBIG");
SYSCTL_ADD_QUAD(ctx_list, queue_list, OID_AUTO, "no_tx_dma_setup",
CTLFLAG_RD,
&txq->ift_no_tx_dma_setup, "# of times map failed for other than EFBIG");
SYSCTL_ADD_U16(ctx_list, queue_list, OID_AUTO, "txq_pidx",
CTLFLAG_RD,
&txq->ift_pidx, 1, "Producer Index");
SYSCTL_ADD_U16(ctx_list, queue_list, OID_AUTO, "txq_cidx",
CTLFLAG_RD,
&txq->ift_cidx, 1, "Consumer Index");
SYSCTL_ADD_U16(ctx_list, queue_list, OID_AUTO, "txq_cidx_processed",
CTLFLAG_RD,
&txq->ift_cidx_processed, 1, "Consumer Index seen by credit update");
SYSCTL_ADD_U16(ctx_list, queue_list, OID_AUTO, "txq_in_use",
CTLFLAG_RD,
&txq->ift_in_use, 1, "descriptors in use");
SYSCTL_ADD_QUAD(ctx_list, queue_list, OID_AUTO, "txq_processed",
CTLFLAG_RD,
&txq->ift_processed, "descriptors procesed for clean");
SYSCTL_ADD_QUAD(ctx_list, queue_list, OID_AUTO, "txq_cleaned",
CTLFLAG_RD,
&txq->ift_cleaned, "total cleaned");
SYSCTL_ADD_PROC(ctx_list, queue_list, OID_AUTO, "ring_state",
CTLTYPE_STRING | CTLFLAG_RD, __DEVOLATILE(uint64_t *, &txq->ift_br->state),
0, mp_ring_state_handler, "A", "soft ring state");
SYSCTL_ADD_COUNTER_U64(ctx_list, queue_list, OID_AUTO, "r_enqueues",
CTLFLAG_RD, &txq->ift_br->enqueues,
"# of enqueues to the mp_ring for this queue");
SYSCTL_ADD_COUNTER_U64(ctx_list, queue_list, OID_AUTO, "r_drops",
CTLFLAG_RD, &txq->ift_br->drops,
"# of drops in the mp_ring for this queue");
SYSCTL_ADD_COUNTER_U64(ctx_list, queue_list, OID_AUTO, "r_starts",
CTLFLAG_RD, &txq->ift_br->starts,
"# of normal consumer starts in the mp_ring for this queue");
SYSCTL_ADD_COUNTER_U64(ctx_list, queue_list, OID_AUTO, "r_stalls",
CTLFLAG_RD, &txq->ift_br->stalls,
"# of consumer stalls in the mp_ring for this queue");
SYSCTL_ADD_COUNTER_U64(ctx_list, queue_list, OID_AUTO, "r_restarts",
CTLFLAG_RD, &txq->ift_br->restarts,
"# of consumer restarts in the mp_ring for this queue");
SYSCTL_ADD_COUNTER_U64(ctx_list, queue_list, OID_AUTO, "r_abdications",
CTLFLAG_RD, &txq->ift_br->abdications,
"# of consumer abdications in the mp_ring for this queue");
}
if (scctx->isc_nrxqsets > 100)
qfmt = "rxq%03d";
else if (scctx->isc_nrxqsets > 10)
qfmt = "rxq%02d";
else
qfmt = "rxq%d";
for (i = 0, rxq = ctx->ifc_rxqs; i < scctx->isc_nrxqsets; i++, rxq++) {
snprintf(namebuf, NAME_BUFLEN, qfmt, i);
queue_node = SYSCTL_ADD_NODE(ctx_list, child, OID_AUTO, namebuf,
CTLFLAG_RD, NULL, "Queue Name");
queue_list = SYSCTL_CHILDREN(queue_node);
if (sctx->isc_flags & IFLIB_HAS_RXCQ) {
SYSCTL_ADD_U16(ctx_list, queue_list, OID_AUTO, "rxq_cq_pidx",
CTLFLAG_RD,
&rxq->ifr_cq_pidx, 1, "Producer Index");
SYSCTL_ADD_U16(ctx_list, queue_list, OID_AUTO, "rxq_cq_cidx",
CTLFLAG_RD,
&rxq->ifr_cq_cidx, 1, "Consumer Index");
}
for (j = 0, fl = rxq->ifr_fl; j < rxq->ifr_nfl; j++, fl++) {
snprintf(namebuf, NAME_BUFLEN, "rxq_fl%d", j);
fl_node = SYSCTL_ADD_NODE(ctx_list, queue_list, OID_AUTO, namebuf,
CTLFLAG_RD, NULL, "freelist Name");
fl_list = SYSCTL_CHILDREN(fl_node);
SYSCTL_ADD_U16(ctx_list, fl_list, OID_AUTO, "pidx",
CTLFLAG_RD,
&fl->ifl_pidx, 1, "Producer Index");
SYSCTL_ADD_U16(ctx_list, fl_list, OID_AUTO, "cidx",
CTLFLAG_RD,
&fl->ifl_cidx, 1, "Consumer Index");
SYSCTL_ADD_U16(ctx_list, fl_list, OID_AUTO, "credits",
CTLFLAG_RD,
&fl->ifl_credits, 1, "credits available");
#if MEMORY_LOGGING
SYSCTL_ADD_QUAD(ctx_list, fl_list, OID_AUTO, "fl_m_enqueued",
CTLFLAG_RD,
&fl->ifl_m_enqueued, "mbufs allocated");
SYSCTL_ADD_QUAD(ctx_list, fl_list, OID_AUTO, "fl_m_dequeued",
CTLFLAG_RD,
&fl->ifl_m_dequeued, "mbufs freed");
SYSCTL_ADD_QUAD(ctx_list, fl_list, OID_AUTO, "fl_cl_enqueued",
CTLFLAG_RD,
&fl->ifl_cl_enqueued, "clusters allocated");
SYSCTL_ADD_QUAD(ctx_list, fl_list, OID_AUTO, "fl_cl_dequeued",
CTLFLAG_RD,
&fl->ifl_cl_dequeued, "clusters freed");
#endif
}
}
}
#ifndef __NO_STRICT_ALIGNMENT
static struct mbuf *
iflib_fixup_rx(struct mbuf *m)
{
struct mbuf *n;
if (m->m_len <= (MCLBYTES - ETHER_HDR_LEN)) {
bcopy(m->m_data, m->m_data + ETHER_HDR_LEN, m->m_len);
m->m_data += ETHER_HDR_LEN;
n = m;
} else {
MGETHDR(n, M_NOWAIT, MT_DATA);
if (n == NULL) {
m_freem(m);
return (NULL);
}
bcopy(m->m_data, n->m_data, ETHER_HDR_LEN);
m->m_data += ETHER_HDR_LEN;
m->m_len -= ETHER_HDR_LEN;
n->m_len = ETHER_HDR_LEN;
M_MOVE_PKTHDR(n, m);
n->m_next = m;
}
return (n);
}
#endif
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