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- /*-
- * Copyright (c) 2014-2018, 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>
- #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/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/sockio.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_private.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/debugnet.h>
- #include <net/pfil.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"
- #ifdef PCI_IOV
- #include <dev/pci/pci_iov.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");
- #define IFLIB_RXEOF_MORE (1U << 0)
- #define IFLIB_RXEOF_EMPTY (2U << 0)
- 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);
- static void iflib_timer(void *arg);
- static void iflib_tqg_detach(if_ctx_t ctx);
- 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 sx ifc_ctx_sx;
- struct mtx ifc_state_mtx;
- 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;
- uint32_t ifc_rx_mbuf_sz;
- int ifc_link_state;
- 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 ifmedia *ifc_mediap;
- 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;
- uint16_t ifc_sysctl_tx_abdicate;
- uint16_t ifc_sysctl_core_offset;
- #define CORE_OFFSET_UNSPECIFIED 0xffff
- uint8_t ifc_sysctl_separate_txrx;
- uint8_t ifc_sysctl_use_logical_cores;
- uint16_t ifc_sysctl_extra_msix_vectors;
- bool ifc_cpus_are_physical_cores;
- 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_legacy_intr ifc_txrx.ift_legacy_intr
- #define isc_txq_select ifc_txrx.ift_txq_select
- #define isc_txq_select_v2 ifc_txrx.ift_txq_select_v2
- eventhandler_tag ifc_vlan_attach_event;
- eventhandler_tag ifc_vlan_detach_event;
- struct ether_addr ifc_mac;
- };
- 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_mediap);
- }
- void
- iflib_set_mac(if_ctx_t ctx, uint8_t mac[ETHER_ADDR_LEN])
- {
- bcopy(mac, ctx->ifc_mac.octet, 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);
- }
- uint16_t
- iflib_get_extra_msix_vectors_sysctl(if_ctx_t ctx)
- {
- return (ctx->ifc_sysctl_extra_msix_vectors);
- }
- #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)
- 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 */
- bus_addr_t *ifsd_ba; /* bus addr of cluster for rx */
- } iflib_rxsd_array_t;
- typedef struct iflib_sw_tx_desc_array {
- bus_dmamap_t *ifsd_map; /* bus_dma maps for packet */
- bus_dmamap_t *ifsd_tso_map; /* bus_dma maps for TSO packet */
- struct mbuf **ifsd_m; /* pkthdr mbufs */
- } if_txsd_vec_t;
- /* magic number that should be high enough for any hardware */
- #define IFLIB_MAX_TX_SEGS 128
- #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_SPARE1 0x008
- #define IFC_SC_ALLOCATED 0x010
- #define IFC_INIT_DONE 0x020
- #define IFC_PREFETCH 0x040
- #define IFC_DO_RESET 0x080
- #define IFC_DO_WATCHDOG 0x100
- #define IFC_SPARE0 0x200
- #define IFC_SPARE2 0x400
- #define IFC_IN_DETACH 0x800
- #define IFC_NETMAP_TX_IRQ 0x80000000
- #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;
- uint64_t ift_last_timer_tick;
- 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;
- #ifdef DEV_NETMAP
- struct callout ift_netmap_timer;
- #endif /* DEV_NETMAP */
- 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_buf_tag;
- bus_dma_tag_t ift_tso_buf_tag;
- iflib_dma_info_t ift_ifdi;
- #define MTX_NAME_LEN 32
- char ift_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_buf_tag;
- iflib_dma_info_t ifl_ifdi;
- uint64_t ifl_bus_addrs[IFLIB_MAX_RX_REFRESH] __aligned(CACHE_LINE_SIZE);
- 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_ctx_t ifr_ctx;
- iflib_fl_t ifr_fl;
- uint64_t ifr_rx_irq;
- struct pfil_head *pfil;
- /*
- * If there is a separate completion queue (IFLIB_HAS_RXCQ), this is
- * the completion queue consumer index. Otherwise it's unused.
- */
- qidx_t ifr_cq_cidx;
- uint16_t ifr_id;
- uint8_t ifr_nfl;
- uint8_t ifr_ntxqirq;
- uint8_t ifr_txqid[IFLIB_MAX_TX_SHARED_INTR];
- uint8_t ifr_fl_offset;
- struct lro_ctrl ifr_lc;
- struct grouptask ifr_task;
- struct callout ifr_watchdog;
- 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;
- iflib_fl_t ifsd_fl;
- } *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) sx_init(&(_sc)->ifc_ctx_sx, "iflib ctx lock")
- #define CTX_LOCK(ctx) sx_xlock(&(ctx)->ifc_ctx_sx)
- #define CTX_UNLOCK(ctx) sx_xunlock(&(ctx)->ifc_ctx_sx)
- #define CTX_LOCK_DESTROY(ctx) sx_destroy(&(ctx)->ifc_ctx_sx)
- #define STATE_LOCK_INIT(_sc, _name) mtx_init(&(_sc)->ifc_state_mtx, _name, "iflib state lock", MTX_DEF)
- #define STATE_LOCK(ctx) mtx_lock(&(ctx)->ifc_state_mtx)
- #define STATE_UNLOCK(ctx) mtx_unlock(&(ctx)->ifc_state_mtx)
- #define STATE_LOCK_DESTROY(ctx) mtx_destroy(&(ctx)->ifc_state_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 | CTLFLAG_MPSAFE, 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");
- static int iflib_timer_default = 1000;
- SYSCTL_INT(_net_iflib, OID_AUTO, timer_default, CTLFLAG_RW,
- &iflib_timer_default, 0, "number of ticks between iflib_timer calls");
- #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;
- 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");
- 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_rx_unavail;
- static int iflib_rx_ctx_inactive;
- static int iflib_rx_if_input;
- static int iflib_rxd_flush;
- static int iflib_verbose_debug;
- 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_if_input, CTLFLAG_RD, &iflib_rx_if_input,
- 0, "# times rxeof called if_input");
- 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_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_rx_unavail =
- iflib_rx_ctx_inactive = iflib_rx_if_input =
- 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, const char *str);
- static void iflib_txq_check_drain(iflib_txq_t txq, int budget);
- static uint32_t iflib_txq_can_drain(struct ifmp_ring *);
- #ifdef ALTQ
- static void iflib_altq_if_start(if_t ifp);
- static int iflib_altq_if_transmit(if_t ifp, struct mbuf *m);
- #endif
- static int iflib_register(if_ctx_t);
- static void iflib_deregister(if_ctx_t);
- static void iflib_unregister_vlan_handlers(if_ctx_t ctx);
- static uint16_t iflib_get_mbuf_size_for(unsigned int size);
- 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);
- static void iflib_free_intr_mem(if_ctx_t ctx);
- #ifndef __NO_STRICT_ALIGNMENT
- static struct mbuf * iflib_fixup_rx(struct mbuf *m);
- #endif
- static SLIST_HEAD(cpu_offset_list, cpu_offset) cpu_offsets =
- SLIST_HEAD_INITIALIZER(cpu_offsets);
- struct cpu_offset {
- SLIST_ENTRY(cpu_offset) entries;
- cpuset_t set;
- unsigned int refcount;
- uint16_t next_cpuid;
- };
- static struct mtx cpu_offset_mtx;
- MTX_SYSINIT(iflib_cpu_offset, &cpu_offset_mtx, "iflib_cpu_offset lock",
- MTX_DEF);
- DEBUGNET_DEFINE(iflib);
- static int
- iflib_num_rx_descs(if_ctx_t ctx)
- {
- if_softc_ctx_t scctx = &ctx->ifc_softc_ctx;
- if_shared_ctx_t sctx = ctx->ifc_sctx;
- uint16_t first_rxq = (sctx->isc_flags & IFLIB_HAS_RXCQ) ? 1 : 0;
- return scctx->isc_nrxd[first_rxq];
- }
- static int
- iflib_num_tx_descs(if_ctx_t ctx)
- {
- if_softc_ctx_t scctx = &ctx->ifc_softc_ctx;
- if_shared_ctx_t sctx = ctx->ifc_sctx;
- uint16_t first_txq = (sctx->isc_flags & IFLIB_HAS_TXCQ) ? 1 : 0;
- return scctx->isc_ntxd[first_txq];
- }
- #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, bool init);
- static void iflib_netmap_timer(void *arg);
- /*
- * 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)
- {
- if_t ifp = na->ifp;
- if_ctx_t ctx = if_getsoftc(ifp);
- int status;
- CTX_LOCK(ctx);
- if (!CTX_IS_VF(ctx))
- IFDI_CRCSTRIP_SET(ctx, onoff, iflib_crcstrip);
- iflib_stop(ctx);
- /*
- * Enable (or disable) netmap flags, and intercept (or restore)
- * ifp->if_transmit. This is done once the device has been stopped
- * to prevent race conditions. Also, this must be done after
- * calling netmap_disable_all_rings() and before calling
- * netmap_enable_all_rings(), so that these two functions see the
- * updated state of the NAF_NETMAP_ON bit.
- */
- if (onoff) {
- nm_set_native_flags(na);
- } else {
- nm_clear_native_flags(na);
- }
- iflib_init_locked(ctx);
- IFDI_CRCSTRIP_SET(ctx, onoff, iflib_crcstrip); // XXX why twice ?
- status = if_getdrvflags(ifp) & IFF_DRV_RUNNING ? 0 : 1;
- if (status)
- nm_clear_native_flags(na);
- CTX_UNLOCK(ctx);
- return (status);
- }
- static int
- iflib_netmap_config(struct netmap_adapter *na, struct nm_config_info *info)
- {
- if_t ifp = na->ifp;
- if_ctx_t ctx = if_getsoftc(ifp);
- iflib_rxq_t rxq = &ctx->ifc_rxqs[0];
- iflib_fl_t fl = &rxq->ifr_fl[0];
- info->num_tx_rings = ctx->ifc_softc_ctx.isc_ntxqsets;
- info->num_rx_rings = ctx->ifc_softc_ctx.isc_nrxqsets;
- info->num_tx_descs = iflib_num_tx_descs(ctx);
- info->num_rx_descs = iflib_num_rx_descs(ctx);
- info->rx_buf_maxsize = fl->ifl_buf_size;
- nm_prinf("txr %u rxr %u txd %u rxd %u rbufsz %u",
- info->num_tx_rings, info->num_rx_rings, info->num_tx_descs,
- info->num_rx_descs, info->rx_buf_maxsize);
- return 0;
- }
- static int
- netmap_fl_refill(iflib_rxq_t rxq, struct netmap_kring *kring, bool init)
- {
- struct netmap_adapter *na = kring->na;
- u_int const lim = kring->nkr_num_slots - 1;
- 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];
- u_int nic_i_first, nic_i;
- u_int nm_i;
- int i, n;
- #if IFLIB_DEBUG_COUNTERS
- int rf_count = 0;
- #endif
- /*
- * This function is used both at initialization and in rxsync.
- * At initialization we need to prepare (with isc_rxd_refill())
- * all the netmap buffers currently owned by the kernel, in
- * such a way to keep fl->ifl_pidx and kring->nr_hwcur in sync
- * (except for kring->nkr_hwofs). These may be less than
- * kring->nkr_num_slots if netmap_reset() was called while
- * an application using the kring that still owned some
- * buffers.
- * At rxsync time, both indexes point to the next buffer to be
- * refilled.
- * In any case we publish (with isc_rxd_flush()) up to
- * (fl->ifl_pidx - 1) % N (included), to avoid the NIC tail/prod
- * pointer to overrun the head/cons pointer, although this is
- * not necessary for some NICs (e.g. vmx).
- */
- if (__predict_false(init)) {
- n = kring->nkr_num_slots - nm_kr_rxspace(kring);
- } else {
- n = kring->rhead - kring->nr_hwcur;
- if (n == 0)
- return (0); /* Nothing to do. */
- if (n < 0)
- n += kring->nkr_num_slots;
- }
- iru_init(&iru, rxq, 0 /* flid */);
- map = fl->ifl_sds.ifsd_map;
- nic_i = fl->ifl_pidx;
- nm_i = netmap_idx_n2k(kring, nic_i);
- if (__predict_false(init)) {
- /*
- * On init/reset, nic_i must be 0, and we must
- * start to refill from hwtail (see netmap_reset()).
- */
- MPASS(nic_i == 0);
- MPASS(nm_i == kring->nr_hwtail);
- } else
- MPASS(nm_i == kring->nr_hwcur);
- DBG_COUNTER_INC(fl_refills);
- while (n > 0) {
- #if IFLIB_DEBUG_COUNTERS
- if (++rf_count == 9)
- DBG_COUNTER_INC(fl_refills_large);
- #endif
- nic_i_first = nic_i;
- for (i = 0; n > 0 && i < IFLIB_MAX_RX_REFRESH; n--, i++) {
- struct netmap_slot *slot = &ring->slot[nm_i];
- uint64_t paddr;
- void *addr = PNMB(na, slot, &paddr);
- MPASS(i < IFLIB_MAX_RX_REFRESH);
- if (addr == NETMAP_BUF_BASE(na)) /* bad buf */
- return netmap_ring_reinit(kring);
- fl->ifl_bus_addrs[i] = paddr +
- nm_get_offset(kring, slot);
- fl->ifl_rxd_idxs[i] = nic_i;
- if (__predict_false(init)) {
- netmap_load_map(na, fl->ifl_buf_tag,
- map[nic_i], addr);
- } else if (slot->flags & NS_BUF_CHANGED) {
- /* buffer has changed, reload map */
- netmap_reload_map(na, fl->ifl_buf_tag,
- map[nic_i], addr);
- }
- bus_dmamap_sync(fl->ifl_buf_tag, map[nic_i],
- BUS_DMASYNC_PREREAD);
- slot->flags &= ~NS_BUF_CHANGED;
- nm_i = nm_next(nm_i, lim);
- nic_i = nm_next(nic_i, lim);
- }
- iru.iru_pidx = nic_i_first;
- iru.iru_count = i;
- ctx->isc_rxd_refill(ctx->ifc_softc, &iru);
- }
- fl->ifl_pidx = nic_i;
- /*
- * At the end of the loop we must have refilled everything
- * we could possibly refill.
- */
- MPASS(nm_i == kring->rhead);
- kring->nr_hwcur = nm_i;
- 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,
- nm_prev(nic_i, lim));
- DBG_COUNTER_INC(rxd_flush);
- return (0);
- }
- #define NETMAP_TX_TIMER_US 90
- /*
- * 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;
- if_t ifp = na->ifp;
- struct netmap_ring *ring = kring->ring;
- u_int nm_i; /* index into the netmap kring */
- u_int nic_i; /* index into the NIC ring */
- u_int const lim = kring->nkr_num_slots - 1;
- u_int const head = kring->rhead;
- struct if_pkt_info pi;
- int tx_pkts = 0, tx_bytes = 0;
- /*
- * 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 = if_getsoftc(ifp);
- iflib_txq_t txq = &ctx->ifc_txqs[kring->ring_id];
- bus_dmamap_sync(txq->ift_ifdi->idi_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 kring,
- * 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 = kring->nr_hwcur;
- if (nm_i != head) { /* we have new packets to send */
- uint32_t pkt_len = 0, seg_idx = 0;
- int nic_i_start = -1, flags = 0;
- pkt_info_zero(&pi);
- pi.ipi_segs = txq->ift_segs;
- pi.ipi_qsidx = kring->ring_id;
- nic_i = netmap_idx_k2n(kring, nm_i);
- __builtin_prefetch(&ring->slot[nm_i]);
- __builtin_prefetch(&txq->ift_sds.ifsd_m[nic_i]);
- __builtin_prefetch(&txq->ift_sds.ifsd_map[nic_i]);
- while (nm_i != head) {
- struct netmap_slot *slot = &ring->slot[nm_i];
- uint64_t offset = nm_get_offset(kring, slot);
- u_int len = slot->len;
- uint64_t paddr;
- void *addr = PNMB(na, slot, &paddr);
- flags |= (slot->flags & NS_REPORT ||
- nic_i == 0 || nic_i == report_frequency) ?
- IPI_TX_INTR : 0;
- /*
- * If this is the first packet fragment, save the
- * index of the first NIC slot for later.
- */
- if (nic_i_start < 0)
- nic_i_start = nic_i;
- pi.ipi_segs[seg_idx].ds_addr = paddr + offset;
- pi.ipi_segs[seg_idx].ds_len = len;
- if (len) {
- pkt_len += len;
- seg_idx++;
- }
- if (!(slot->flags & NS_MOREFRAG)) {
- pi.ipi_len = pkt_len;
- pi.ipi_nsegs = seg_idx;
- pi.ipi_pidx = nic_i_start;
- pi.ipi_ndescs = 0;
- pi.ipi_flags = flags;
- /* Prepare the NIC TX ring. */
- ctx->isc_txd_encap(ctx->ifc_softc, &pi);
- DBG_COUNTER_INC(tx_encap);
- /* Update transmit counters */
- tx_bytes += pi.ipi_len;
- tx_pkts++;
- /* Reinit per-packet info for the next one. */
- flags = seg_idx = pkt_len = 0;
- nic_i_start = -1;
- }
- /* prefetch for next round */
- __builtin_prefetch(&ring->slot[nm_i + 1]);
- __builtin_prefetch(&txq->ift_sds.ifsd_m[nic_i + 1]);
- __builtin_prefetch(&txq->ift_sds.ifsd_map[nic_i + 1]);
- NM_CHECK_ADDR_LEN_OFF(na, len, offset);
- if (slot->flags & NS_BUF_CHANGED) {
- /* buffer has changed, reload map */
- netmap_reload_map(na, txq->ift_buf_tag,
- txq->ift_sds.ifsd_map[nic_i], addr);
- }
- /* make sure changes to the buffer are synced */
- bus_dmamap_sync(txq->ift_buf_tag,
- txq->ift_sds.ifsd_map[nic_i],
- BUS_DMASYNC_PREWRITE);
- slot->flags &= ~(NS_REPORT | NS_BUF_CHANGED | NS_MOREFRAG);
- nm_i = nm_next(nm_i, lim);
- nic_i = nm_next(nic_i, lim);
- }
- kring->nr_hwcur = nm_i;
- /* synchronize the NIC ring */
- bus_dmamap_sync(txq->ift_ifdi->idi_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 there are unclaimed buffers, attempt to reclaim them.
- * If we don't manage to reclaim them all, and TX IRQs are not in use,
- * trigger a per-tx-queue timer to try again later.
- */
- if (kring->nr_hwtail != nm_prev(kring->nr_hwcur, lim)) {
- 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);
- }
- }
- if (!(ctx->ifc_flags & IFC_NETMAP_TX_IRQ))
- if (kring->nr_hwtail != nm_prev(kring->nr_hwcur, lim)) {
- callout_reset_sbt_on(&txq->ift_netmap_timer,
- NETMAP_TX_TIMER_US * SBT_1US, SBT_1US,
- iflib_netmap_timer, txq,
- txq->ift_netmap_timer.c_cpu, 0);
- }
- if_inc_counter(ifp, IFCOUNTER_OBYTES, tx_bytes);
- if_inc_counter(ifp, IFCOUNTER_OPACKETS, tx_pkts);
- 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;
- if_t ifp = na->ifp;
- uint32_t nm_i; /* index into the netmap ring */
- uint32_t nic_i; /* index into the NIC ring */
- u_int n;
- u_int const lim = kring->nkr_num_slots - 1;
- int force_update = (flags & NAF_FORCE_READ) || kring->nr_kflags & NKR_PENDINTR;
- int i = 0, rx_bytes = 0, rx_pkts = 0;
- if_ctx_t ctx = if_getsoftc(ifp);
- if_shared_ctx_t sctx = ctx->ifc_sctx;
- if_softc_ctx_t scctx = &ctx->ifc_softc_ctx;
- iflib_rxq_t rxq = &ctx->ifc_rxqs[kring->ring_id];
- iflib_fl_t fl = &rxq->ifr_fl[0];
- struct if_rxd_info ri;
- qidx_t *cidxp;
- /*
- * netmap only uses free list 0, to avoid out of order consumption
- * of receive buffers
- */
- bus_dmamap_sync(fl->ifl_ifdi->idi_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
- * (or in the free list 0 if IFLIB_HAS_RXCQ is set), and they may
- * differ in case if_init() has been called while
- * in netmap mode. For the receive ring we have
- *
- * nic_i = fl->ifl_cidx;
- * nm_i = kring->nr_hwtail (previous)
- * and
- * nm_i == (nic_i + kring->nkr_hwofs) % ring_size
- *
- * fl->ifl_cidx is set to 0 on a ring reinit
- */
- if (netmap_no_pendintr || force_update) {
- uint32_t hwtail_lim = nm_prev(kring->nr_hwcur, lim);
- bool have_rxcq = sctx->isc_flags & IFLIB_HAS_RXCQ;
- int crclen = iflib_crcstrip ? 0 : 4;
- int error, avail;
- /*
- * For the free list consumer index, we use the same
- * logic as in iflib_rxeof().
- */
- if (have_rxcq)
- cidxp = &rxq->ifr_cq_cidx;
- else
- cidxp = &fl->ifl_cidx;
- avail = ctx->isc_rxd_available(ctx->ifc_softc,
- rxq->ifr_id, *cidxp, USHRT_MAX);
- nic_i = fl->ifl_cidx;
- nm_i = netmap_idx_n2k(kring, nic_i);
- MPASS(nm_i == kring->nr_hwtail);
- for (n = 0; avail > 0 && nm_i != hwtail_lim; 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 = *cidxp;
- error = ctx->isc_rxd_pkt_get(ctx->ifc_softc, &ri);
- for (i = 0; i < ri.iri_nfrags; i++) {
- if (error) {
- ring->slot[nm_i].len = 0;
- ring->slot[nm_i].flags = 0;
- } else {
- ring->slot[nm_i].len = ri.iri_frags[i].irf_len;
- if (i == (ri.iri_nfrags - 1)) {
- ring->slot[nm_i].len -= crclen;
- ring->slot[nm_i].flags = 0;
- /* Update receive counters */
- rx_bytes += ri.iri_len;
- rx_pkts++;
- } else
- ring->slot[nm_i].flags = NS_MOREFRAG;
- }
- bus_dmamap_sync(fl->ifl_buf_tag,
- fl->ifl_sds.ifsd_map[nic_i], BUS_DMASYNC_POSTREAD);
- nm_i = nm_next(nm_i, lim);
- fl->ifl_cidx = nic_i = nm_next(nic_i, lim);
- }
- if (have_rxcq) {
- *cidxp = ri.iri_cidx;
- while (*cidxp >= scctx->isc_nrxd[0])
- *cidxp -= scctx->isc_nrxd[0];
- }
- }
- if (n) { /* update the state variables */
- if (netmap_no_pendintr && !force_update) {
- /* diagnostics */
- iflib_rx_miss ++;
- iflib_rx_miss_bufs += n;
- }
- kring->nr_hwtail = 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
- */
- netmap_fl_refill(rxq, kring, false);
- if_inc_counter(ifp, IFCOUNTER_IBYTES, rx_bytes);
- if_inc_counter(ifp, IFCOUNTER_IPACKETS, rx_pkts);
- return (0);
- }
- static void
- iflib_netmap_intr(struct netmap_adapter *na, int onoff)
- {
- if_ctx_t ctx = if_getsoftc(na->ifp);
- 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;
- bzero(&na, sizeof(na));
- na.ifp = ctx->ifc_ifp;
- na.na_flags = NAF_BDG_MAYSLEEP | NAF_MOREFRAG | NAF_OFFSETS;
- MPASS(ctx->ifc_softc_ctx.isc_ntxqsets);
- MPASS(ctx->ifc_softc_ctx.isc_nrxqsets);
- na.num_tx_desc = iflib_num_tx_descs(ctx);
- na.num_rx_desc = iflib_num_rx_descs(ctx);
- 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.nm_config = iflib_netmap_config;
- 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 int
- 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 (0);
- 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_buf_tag, txq->ift_sds.ifsd_map[i],
- NMB(na, slot + si));
- }
- return (1);
- }
- static int
- iflib_netmap_rxq_init(if_ctx_t ctx, iflib_rxq_t rxq)
- {
- struct netmap_adapter *na = NA(ctx->ifc_ifp);
- struct netmap_kring *kring;
- struct netmap_slot *slot;
- slot = netmap_reset(na, NR_RX, rxq->ifr_id, 0);
- if (slot == NULL)
- return (0);
- kring = na->rx_rings[rxq->ifr_id];
- netmap_fl_refill(rxq, kring, true);
- return (1);
- }
- static void
- iflib_netmap_timer(void *arg)
- {
- iflib_txq_t txq = arg;
- if_ctx_t ctx = txq->ift_ctx;
- /*
- * Wake up the netmap application, to give it a chance to
- * call txsync and reclaim more completed TX buffers.
- */
- netmap_tx_irq(ctx->ifc_ifp, txq->ift_id);
- }
- #define iflib_netmap_detach(ifp) netmap_detach(ifp)
- #else
- #define iflib_netmap_txq_init(ctx, txq) (0)
- #define iflib_netmap_rxq_init(ctx, rxq) (0)
- #define iflib_netmap_detach(ifp)
- #define netmap_enable_all_rings(ifp)
- #define netmap_disable_all_rings(ifp)
- #define iflib_netmap_attach(ctx) (0)
- #define netmap_rx_irq(ifp, qid, budget) (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
- static __inline void
- prefetch(void *x)
- {
- }
- static __inline void
- prefetch2cachelines(void *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_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;
- }
- #define DMA_WIDTH_TO_BUS_LOWADDR(width) \
- (((width) == 0) || (width) == flsll(BUS_SPACE_MAXADDR) ? \
- BUS_SPACE_MAXADDR : (1ULL << (width)) - 1ULL)
- int
- iflib_dma_alloc_align(if_ctx_t ctx, int size, int align, iflib_dma_info_t dma, int mapflags)
- {
- int err;
- device_t dev = ctx->ifc_dev;
- bus_addr_t lowaddr;
- lowaddr = DMA_WIDTH_TO_BUS_LOWADDR(ctx->ifc_softc_ctx.isc_dma_width);
- err = bus_dma_tag_create(bus_get_dma_tag(dev), /* parent */
- align, 0, /* alignment, bounds */
- lowaddr, /* 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 (size=%d, align=%d)\n",
- __func__, err, size, align);
- 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(if_ctx_t ctx, int size, iflib_dma_info_t dma, int mapflags)
- {
- if_shared_ctx_t sctx = ctx->ifc_sctx;
- KASSERT(sctx->isc_q_align != 0, ("alignment value not initialized"));
- return (iflib_dma_alloc_align(ctx, size, sctx->isc_q_align, dma, mapflags));
- }
- 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);
- }
- static int
- iflib_fast_intr(void *arg)
- {
- iflib_filter_info_t info = arg;
- struct grouptask *gtask = info->ifi_task;
- int result;
- DBG_COUNTER_INC(fast_intrs);
- if (info->ifi_filter != NULL) {
- result = info->ifi_filter(info->ifi_filter_arg);
- if ((result & FILTER_SCHEDULE_THREAD) == 0)
- return (result);
- }
- 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;
- if_ctx_t ctx;
- iflib_rxq_t rxq = (iflib_rxq_t)info->ifi_ctx;
- iflib_txq_t txq;
- void *sc;
- int i, cidx, result;
- qidx_t txqid;
- bool intr_enable, intr_legacy;
- DBG_COUNTER_INC(fast_intrs);
- if (info->ifi_filter != NULL) {
- result = info->ifi_filter(info->ifi_filter_arg);
- if ((result & FILTER_SCHEDULE_THREAD) == 0)
- return (result);
- }
- ctx = rxq->ifr_ctx;
- sc = ctx->ifc_softc;
- intr_enable = false;
- intr_legacy = !!(ctx->ifc_flags & IFC_LEGACY);
- MPASS(rxq->ifr_ntxqirq);
- for (i = 0; i < rxq->ifr_ntxqirq; i++) {
- txqid = rxq->ifr_txqid[i];
- txq = &ctx->ifc_txqs[txqid];
- bus_dmamap_sync(txq->ift_ifdi->idi_tag, txq->ift_ifdi->idi_map,
- BUS_DMASYNC_POSTREAD);
- if (!ctx->isc_txd_credits_update(sc, txqid, false)) {
- if (intr_legacy)
- intr_enable = true;
- else
- IFDI_TX_QUEUE_INTR_ENABLE(ctx, txqid);
- continue;
- }
- GROUPTASK_ENQUEUE(&txq->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 {
- if (intr_legacy)
- intr_enable = true;
- else
- IFDI_RX_QUEUE_INTR_ENABLE(ctx, rxq->ifr_id);
- DBG_COUNTER_INC(rx_intr_enables);
- }
- if (intr_enable)
- IFDI_INTR_ENABLE(ctx);
- return (FILTER_HANDLED);
- }
- static int
- iflib_fast_intr_ctx(void *arg)
- {
- iflib_filter_info_t info = arg;
- struct grouptask *gtask = info->ifi_task;
- int result;
- DBG_COUNTER_INC(fast_intrs);
- if (info->ifi_filter != NULL) {
- result = info->ifi_filter(info->ifi_filter_arg);
- if ((result & FILTER_SCHEDULE_THREAD) == 0)
- return (result);
- }
- if (gtask->gt_taskqueue != NULL)
- 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,
- const char *name)
- {
- struct resource *res;
- void *tag = NULL;
- device_t dev = ctx->ifc_dev;
- int flags, i, rc;
- flags = RF_ACTIVE;
- if (ctx->ifc_flags & IFC_LEGACY)
- flags |= RF_SHAREABLE;
- MPASS(rid < 512);
- i = rid;
- res = bus_alloc_resource_any(dev, SYS_RES_IRQ, &i, 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 DMA resources for TX buffers as well as memory for the TX
- * mbuf map. TX DMA maps (non-TSO/TSO) and TX mbuf map are kept in a
- * iflib_sw_tx_desc_array structure, storing all the information that
- * is 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;
- bus_size_t tsomaxsize;
- bus_addr_t lowaddr;
- int err, nsegments, ntsosegments;
- bool tso;
- nsegments = scctx->isc_tx_nsegments;
- ntsosegments = scctx->isc_tx_tso_segments_max;
- tsomaxsize = scctx->isc_tx_tso_size_max;
- if (if_getcapabilities(ctx->ifc_ifp) & IFCAP_VLAN_MTU)
- tsomaxsize += sizeof(struct ether_vlan_header);
- MPASS(scctx->isc_ntxd[0] > 0);
- MPASS(scctx->isc_ntxd[txq->ift_br_offset] > 0);
- MPASS(nsegments > 0);
- if (if_getcapabilities(ctx->ifc_ifp) & IFCAP_TSO) {
- MPASS(ntsosegments > 0);
- MPASS(sctx->isc_tso_maxsize >= tsomaxsize);
- }
- lowaddr = DMA_WIDTH_TO_BUS_LOWADDR(scctx->isc_dma_width);
- /*
- * Set up DMA tags for TX buffers.
- */
- if ((err = bus_dma_tag_create(bus_get_dma_tag(dev),
- 1, 0, /* alignment, bounds */
- lowaddr, /* 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_buf_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;
- }
- tso = (if_getcapabilities(ctx->ifc_ifp) & IFCAP_TSO) != 0;
- if (tso && (err = bus_dma_tag_create(bus_get_dma_tag(dev),
- 1, 0, /* alignment, bounds */
- lowaddr, /* lowaddr */
- BUS_SPACE_MAXADDR, /* highaddr */
- NULL, NULL, /* filter, filterarg */
- tsomaxsize, /* maxsize */
- ntsosegments, /* nsegments */
- sctx->isc_tso_maxsegsize,/* maxsegsize */
- 0, /* flags */
- NULL, /* lockfunc */
- NULL, /* lockfuncarg */
- &txq->ift_tso_buf_tag))) {
- device_printf(dev, "Unable to allocate TSO TX DMA tag: %d\n",
- err);
- goto fail;
- }
- /* Allocate memory for the TX mbuf map. */
- 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 mbuf map memory\n");
- err = ENOMEM;
- goto fail;
- }
- /*
- * Create the DMA maps for TX buffers.
- */
- 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)) == NULL) {
- device_printf(dev,
- "Unable to allocate TX buffer DMA map memory\n");
- err = ENOMEM;
- goto fail;
- }
- if (tso && (txq->ift_sds.ifsd_tso_map = (bus_dmamap_t *)malloc(
- sizeof(bus_dmamap_t) * scctx->isc_ntxd[txq->ift_br_offset],
- M_IFLIB, M_NOWAIT | M_ZERO)) == NULL) {
- device_printf(dev,
- "Unable to allocate TSO 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_buf_tag, 0,
- &txq->ift_sds.ifsd_map[i]);
- if (err != 0) {
- device_printf(dev, "Unable to create TX DMA map\n");
- goto fail;
- }
- if (!tso)
- continue;
- err = bus_dmamap_create(txq->ift_tso_buf_tag, 0,
- &txq->ift_sds.ifsd_tso_map[i]);
- if (err != 0) {
- device_printf(dev, "Unable to create TSO TX DMA map\n");
- goto fail;
- }
- }
- 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;
- if (txq->ift_sds.ifsd_map != NULL) {
- map = txq->ift_sds.ifsd_map[i];
- bus_dmamap_sync(txq->ift_buf_tag, map, BUS_DMASYNC_POSTWRITE);
- bus_dmamap_unload(txq->ift_buf_tag, map);
- bus_dmamap_destroy(txq->ift_buf_tag, map);
- txq->ift_sds.ifsd_map[i] = NULL;
- }
- if (txq->ift_sds.ifsd_tso_map != NULL) {
- map = txq->ift_sds.ifsd_tso_map[i];
- bus_dmamap_sync(txq->ift_tso_buf_tag, map,
- BUS_DMASYNC_POSTWRITE);
- bus_dmamap_unload(txq->ift_tso_buf_tag, map);
- bus_dmamap_destroy(txq->ift_tso_buf_tag, map);
- txq->ift_sds.ifsd_tso_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_br != NULL) {
- ifmp_ring_free(txq->ift_br);
- txq->ift_br = NULL;
- }
- mtx_destroy(&txq->ift_mtx);
- 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_tso_map != NULL) {
- free(txq->ift_sds.ifsd_tso_map, M_IFLIB);
- txq->ift_sds.ifsd_tso_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_buf_tag != NULL) {
- bus_dma_tag_destroy(txq->ift_buf_tag);
- txq->ift_buf_tag = NULL;
- }
- if (txq->ift_tso_buf_tag != NULL) {
- bus_dma_tag_destroy(txq->ift_tso_buf_tag);
- txq->ift_tso_buf_tag = NULL;
- }
- if (txq->ift_ifdi != NULL) {
- free(txq->ift_ifdi, M_IFLIB);
- }
- }
- 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_buf_tag,
- txq->ift_sds.ifsd_map[i], BUS_DMASYNC_POSTWRITE);
- bus_dmamap_unload(txq->ift_buf_tag, txq->ift_sds.ifsd_map[i]);
- }
- if (txq->ift_sds.ifsd_tso_map != NULL) {
- bus_dmamap_sync(txq->ift_tso_buf_tag,
- txq->ift_sds.ifsd_tso_map[i], BUS_DMASYNC_POSTWRITE);
- bus_dmamap_unload(txq->ift_tso_buf_tag,
- txq->ift_sds.ifsd_tso_map[i]);
- }
- m_freem(*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;
- if_shared_ctx_t sctx = ctx->ifc_sctx;
- 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 < sctx->isc_ntxqs; 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 < sctx->isc_ntxqs; i++, di++)
- bus_dmamap_sync(di->idi_tag, di->idi_map,
- BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);
- return (0);
- }
- /*********************************************************************
- *
- * Allocate DMA resources for RX buffers as well as memory for the RX
- * mbuf map, direct RX cluster pointer map and RX cluster bus address
- * map. RX DMA map, RX mbuf map, direct RX cluster pointer map and
- * RX cluster map are kept in a iflib_sw_rx_desc_array structure.
- * Since we use use one entry in iflib_sw_rx_desc_array per received
- * packet, the maximum number of entries we'll need is equal to the
- * number of hardware 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;
- bus_addr_t lowaddr;
- int err;
- MPASS(scctx->isc_nrxd[0] > 0);
- MPASS(scctx->isc_nrxd[rxq->ifr_fl_offset] > 0);
- lowaddr = DMA_WIDTH_TO_BUS_LOWADDR(scctx->isc_dma_width);
- 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 */
- /* Set up DMA tag for RX buffers. */
- err = bus_dma_tag_create(bus_get_dma_tag(dev), /* parent */
- 1, 0, /* alignment, bounds */
- lowaddr, /* 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_buf_tag);
- if (err) {
- device_printf(dev,
- "Unable to allocate RX DMA tag: %d\n", err);
- goto fail;
- }
- /* Allocate memory for the RX mbuf map. */
- 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 RX mbuf map memory\n");
- err = ENOMEM;
- goto fail;
- }
- /* Allocate memory for the direct RX cluster pointer map. */
- 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 RX cluster map memory\n");
- err = ENOMEM;
- goto fail;
- }
- /* Allocate memory for the RX cluster bus address map. */
- if (!(fl->ifl_sds.ifsd_ba =
- (bus_addr_t *) malloc(sizeof(bus_addr_t) *
- scctx->isc_nrxd[rxq->ifr_fl_offset], M_IFLIB, M_NOWAIT | M_ZERO))) {
- device_printf(dev,
- "Unable to allocate RX bus address map memory\n");
- err = ENOMEM;
- goto fail;
- }
- /*
- * Create the DMA maps for RX buffers.
- */
- 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 RX buffer DMA 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_buf_tag, 0,
- &fl->ifl_sds.ifsd_map[i]);
- if (err != 0) {
- device_printf(dev, "Unable to create RX buffer DMA map\n");
- goto fail;
- }
- }
- }
- 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;
- }
- /**
- * iflib_fl_refill - refill an rxq free-buffer list
- * @ctx: the iflib context
- * @fl: the free list to refill
- * @count: the number of new buffers to allocate
- *
- * (Re)populate an rxq free-buffer list with up to @count new packet buffers.
- * The caller must assure that @count does not exceed the queue's capacity
- * minus one (since we always leave a descriptor unavailable).
- */
- static uint8_t
- iflib_fl_refill(if_ctx_t ctx, iflib_fl_t fl, int count)
- {
- struct if_rxd_update iru;
- struct rxq_refill_cb_arg cb_arg;
- struct mbuf *m;
- caddr_t cl, *sd_cl;
- struct mbuf **sd_m;
- bus_dmamap_t *sd_map;
- bus_addr_t bus_addr, *sd_ba;
- int err, frag_idx, i, idx, n, pidx;
- qidx_t credits;
- MPASS(count <= fl->ifl_size - fl->ifl_credits - 1);
- sd_m = fl->ifl_sds.ifsd_m;
- sd_map = fl->ifl_sds.ifsd_map;
- sd_cl = fl->ifl_sds.ifsd_cl;
- sd_ba = fl->ifl_sds.ifsd_ba;
- pidx = fl->ifl_pidx;
- idx = pidx;
- frag_idx = fl->ifl_fragidx;
- credits = fl->ifl_credits;
- i = 0;
- 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-- > 0) {
- /*
- * 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)
- bit_ffc(fl->ifl_rx_bitmap, fl->ifl_size, &frag_idx);
- MPASS(frag_idx >= 0);
- if ((cl = sd_cl[frag_idx]) == NULL) {
- cl = uma_zalloc(fl->ifl_zone, M_NOWAIT);
- if (__predict_false(cl == NULL))
- break;
- cb_arg.error = 0;
- MPASS(sd_map != NULL);
- err = bus_dmamap_load(fl->ifl_buf_tag, sd_map[frag_idx],
- cl, fl->ifl_buf_size, _rxq_refill_cb, &cb_arg,
- BUS_DMA_NOWAIT);
- if (__predict_false(err != 0 || cb_arg.error)) {
- uma_zfree(fl->ifl_zone, cl);
- break;
- }
- sd_ba[frag_idx] = bus_addr = cb_arg.seg.ds_addr;
- sd_cl[frag_idx] = cl;
- #if MEMORY_LOGGING
- fl->ifl_cl_enqueued++;
- #endif
- } else {
- bus_addr = sd_ba[frag_idx];
- }
- bus_dmamap_sync(fl->ifl_buf_tag, sd_map[frag_idx],
- BUS_DMASYNC_PREREAD);
- if (sd_m[frag_idx] == NULL) {
- m = m_gethdr_raw(M_NOWAIT, 0);
- if (__predict_false(m == NULL))
- break;
- sd_m[frag_idx] = m;
- }
- bit_set(fl->ifl_rx_bitmap, frag_idx);
- #if MEMORY_LOGGING
- fl->ifl_m_enqueued++;
- #endif
- DBG_COUNTER_INC(rx_allocs);
- fl->ifl_rxd_idxs[i] = frag_idx;
- fl->ifl_bus_addrs[i] = bus_addr;
- credits++;
- i++;
- MPASS(credits <= fl->ifl_size);
- if (++idx == fl->ifl_size) {
- #ifdef INVARIANTS
- fl->ifl_gen = 1;
- #endif
- 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);
- fl->ifl_pidx = idx;
- fl->ifl_credits = credits;
- pidx = idx;
- i = 0;
- }
- }
- if (n < count - 1) {
- if (i != 0) {
- 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);
- 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, fl->ifl_pidx);
- if (__predict_true(bit_test(fl->ifl_rx_bitmap, frag_idx))) {
- fl->ifl_fragidx = frag_idx + 1;
- if (fl->ifl_fragidx == fl->ifl_size)
- fl->ifl_fragidx = 0;
- } else {
- fl->ifl_fragidx = frag_idx;
- }
- }
- return (n == -1 ? 0 : IFLIB_RXEOF_EMPTY);
- }
- static inline uint8_t
- iflib_fl_refill_all(if_ctx_t ctx, iflib_fl_t fl)
- {
- /*
- * We leave an unused descriptor to avoid pidx to catch up with cidx.
- * This is important as it confuses most NICs. For instance,
- * Intel NICs have (per receive ring) RDH and RDT registers, where
- * RDH points to the next receive descriptor to be used by the NIC,
- * and RDT for the next receive descriptor to be published by the
- * driver to the NIC (RDT - 1 is thus the last valid one).
- * The condition RDH == RDT means no descriptors are available to
- * the NIC, and thus it would be ambiguous if it also meant that
- * all the descriptors are available to the NIC.
- */
- 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)
- return (iflib_fl_refill(ctx, fl, reclaimable));
- return (0);
- }
- uint8_t
- iflib_in_detach(if_ctx_t ctx)
- {
- bool in_detach;
- STATE_LOCK(ctx);
- in_detach = !!(ctx->ifc_flags & IFC_IN_DETACH);
- STATE_UNLOCK(ctx);
- return (in_detach);
- }
- static void
- iflib_fl_bufs_free(iflib_fl_t fl)
- {
- iflib_dma_info_t idi = fl->ifl_ifdi;
- bus_dmamap_t sd_map;
- uint32_t i;
- for (i = 0; i < fl->ifl_size; i++) {
- struct mbuf **sd_m = &fl->ifl_sds.ifsd_m[i];
- caddr_t *sd_cl = &fl->ifl_sds.ifsd_cl[i];
- if (*sd_cl != NULL) {
- sd_map = fl->ifl_sds.ifsd_map[i];
- bus_dmamap_sync(fl->ifl_buf_tag, sd_map,
- BUS_DMASYNC_POSTREAD);
- bus_dmamap_unload(fl->ifl_buf_tag, sd_map);
- uma_zfree(fl->ifl_zone, *sd_cl);
- *sd_cl = NULL;
- if (*sd_m != NULL) {
- m_init(*sd_m, M_NOWAIT, MT_DATA, 0);
- m_free_raw(*sd_m);
- *sd_m = NULL;
- }
- } else {
- MPASS(*sd_m == NULL);
- }
- #if MEMORY_LOGGING
- fl->ifl_m_dequeued++;
- fl->ifl_cl_dequeued++;
- #endif
- }
- #ifdef INVARIANTS
- for (i = 0; i < fl->ifl_size; i++) {
- 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 free list 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 scctx = &ctx->ifc_softc_ctx;
- int qidx;
- 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);
- qidx = rxq->ifr_fl_offset + fl->ifl_id;
- if (scctx->isc_rxd_buf_size[qidx] != 0)
- fl->ifl_buf_size = scctx->isc_rxd_buf_size[qidx];
- else
- fl->ifl_buf_size = ctx->ifc_rx_mbuf_sz;
- /*
- * ifl_buf_size may be a driver-supplied value, so pull it up
- * to the selected mbuf size.
- */
- fl->ifl_buf_size = iflib_get_mbuf_size_for(fl->ifl_buf_size);
- 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. In any case make sure
- * to leave a descriptor unavailable. See the comment in
- * iflib_fl_refill_all().
- */
- MPASS(fl->ifl_size > 0);
- (void)iflib_fl_refill(ctx, fl, min(128, fl->ifl_size - 1));
- if (min(128, fl->ifl_size - 1) != 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, j;
- if (rxq->ifr_fl != NULL) {
- for (i = 0; i < rxq->ifr_nfl; i++) {
- fl = &rxq->ifr_fl[i];
- if (fl->ifl_buf_tag != NULL) {
- if (fl->ifl_sds.ifsd_map != NULL) {
- for (j = 0; j < fl->ifl_size; j++) {
- bus_dmamap_sync(
- fl->ifl_buf_tag,
- fl->ifl_sds.ifsd_map[j],
- BUS_DMASYNC_POSTREAD);
- bus_dmamap_unload(
- fl->ifl_buf_tag,
- fl->ifl_sds.ifsd_map[j]);
- bus_dmamap_destroy(
- fl->ifl_buf_tag,
- fl->ifl_sds.ifsd_map[j]);
- }
- }
- bus_dma_tag_destroy(fl->ifl_buf_tag);
- fl->ifl_buf_tag = NULL;
- }
- free(fl->ifl_sds.ifsd_m, M_IFLIB);
- free(fl->ifl_sds.ifsd_cl, M_IFLIB);
- free(fl->ifl_sds.ifsd_ba, M_IFLIB);
- free(fl->ifl_sds.ifsd_map, M_IFLIB);
- free(fl->ifl_rx_bitmap, M_IFLIB);
- fl->ifl_sds.ifsd_m = NULL;
- fl->ifl_sds.ifsd_cl = NULL;
- fl->ifl_sds.ifsd_ba = NULL;
- fl->ifl_sds.ifsd_map = NULL;
- fl->ifl_rx_bitmap = NULL;
- }
- free(rxq->ifr_fl, M_IFLIB);
- rxq->ifr_fl = NULL;
- free(rxq->ifr_ifdi, M_IFLIB);
- rxq->ifr_ifdi = NULL;
- rxq->ifr_cq_cidx = 0;
- }
- }
- /*
- * Timer routine
- */
- 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;
- uint64_t this_tick = ticks;
- 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.
- */
- if (this_tick - txq->ift_last_timer_tick >= iflib_timer_default) {
- txq->ift_last_timer_tick = this_tick;
- 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 (txq->ift_qstatus != IFLIB_QUEUE_IDLE &&
- ifmp_ring_is_stalled(txq->ift_br)) {
- KASSERT(ctx->ifc_link_state == LINK_STATE_UP,
- ("queue can't be marked as hung if interface is down"));
- 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, iflib_timer_default, iflib_timer,
- txq, txq->ift_timer.c_cpu);
- return;
- hung:
- device_printf(ctx->ifc_dev,
- "Watchdog timeout (TX: %d desc avail: %d pidx: %d) -- resetting\n",
- txq->ift_id, TXQ_AVAIL(txq), txq->ift_pidx);
- STATE_LOCK(ctx);
- if_setdrvflagbits(ctx->ifc_ifp, IFF_DRV_OACTIVE, IFF_DRV_RUNNING);
- ctx->ifc_flags |= (IFC_DO_WATCHDOG|IFC_DO_RESET);
- iflib_admin_intr_deferred(ctx);
- STATE_UNLOCK(ctx);
- }
- static uint16_t
- iflib_get_mbuf_size_for(unsigned int size)
- {
- if (size <= MCLBYTES)
- return (MCLBYTES);
- else
- return (MJUMPAGESIZE);
- }
- static void
- iflib_calc_rx_mbuf_sz(if_ctx_t ctx)
- {
- if_softc_ctx_t sctx = &ctx->ifc_softc_ctx;
- /*
- * XXX don't set the max_frame_size to larger
- * than the hardware can handle
- */
- ctx->ifc_rx_mbuf_sz =
- iflib_get_mbuf_size_for(sctx->isc_max_frame_size);
- }
- uint32_t
- iflib_get_rx_mbuf_sz(if_ctx_t ctx)
- {
- return (ctx->ifc_rx_mbuf_sz);
- }
- static void
- iflib_init_locked(if_ctx_t 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);
- /*
- * See iflib_stop(). Useful in case iflib_init_locked() is
- * called without first calling iflib_stop().
- */
- netmap_disable_all_rings(ifp);
- 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 < scctx->isc_ntxqsets; i++, txq++) {
- CALLOUT_LOCK(txq);
- callout_stop(&txq->ift_timer);
- #ifdef DEV_NETMAP
- callout_stop(&txq->ift_netmap_timer);
- #endif /* DEV_NETMAP */
- CALLOUT_UNLOCK(txq);
- (void)iflib_netmap_txq_init(ctx, txq);
- }
- /*
- * Calculate a suitable Rx mbuf size prior to calling IFDI_INIT, so
- * that drivers can use the value when setting up the hardware receive
- * buffers.
- */
- iflib_calc_rx_mbuf_sz(ctx);
- #ifdef INVARIANTS
- i = if_getdrvflags(ifp);
- #endif
- IFDI_INIT(ctx);
- MPASS(if_getdrvflags(ifp) == i);
- for (i = 0, rxq = ctx->ifc_rxqs; i < scctx->isc_nrxqsets; i++, rxq++) {
- if (iflib_netmap_rxq_init(ctx, rxq) > 0) {
- /* This rxq is in netmap mode. Skip normal init. */
- continue;
- }
- for (j = 0, fl = rxq->ifr_fl; j < rxq->ifr_nfl; j++, fl++) {
- if (iflib_fl_setup(fl)) {
- device_printf(ctx->ifc_dev,
- "setting up free list %d failed - "
- "check cluster settings\n", j);
- 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 < scctx->isc_ntxqsets; i++, txq++)
- callout_reset_on(&txq->ift_timer, iflib_timer_default, iflib_timer, txq,
- txq->ift_timer.c_cpu);
- /* Re-enable txsync/rxsync. */
- netmap_enable_all_rings(ifp);
- }
- 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_if_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);
- }
- 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;
- if_shared_ctx_t sctx = ctx->ifc_sctx;
- 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);
- /*
- * Stop any pending txsync/rxsync and prevent new ones
- * form starting. Processes blocked in poll() will get
- * POLLERR.
- */
- netmap_disable_all_rings(ctx->ifc_ifp);
- 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 */
- CALLOUT_LOCK(txq);
- callout_stop(&txq->ift_timer);
- #ifdef DEV_NETMAP
- callout_stop(&txq->ift_netmap_timer);
- #endif /* DEV_NETMAP */
- CALLOUT_UNLOCK(txq);
- /* 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_no_desc_avail = 0;
- if (sctx->isc_flags & IFLIB_PRESERVE_TX_INDICES)
- txq->ift_cidx = txq->ift_pidx;
- else
- txq->ift_cidx = txq->ift_pidx = 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 < sctx->isc_ntxqs; j++, di++)
- bzero((void *)di->idi_vaddr, di->idi_size);
- }
- for (i = 0; i < scctx->isc_nrxqsets; i++, rxq++) {
- if (rxq->ifr_task.gt_taskqueue != NULL)
- gtaskqueue_drain(rxq->ifr_task.gt_taskqueue,
- &rxq->ifr_task.gt_task);
- rxq->ifr_cq_cidx = 0;
- for (j = 0, di = rxq->ifr_ifdi; j < sctx->isc_nrxqs; 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 struct mbuf *
- rxd_frag_to_sd(iflib_rxq_t rxq, if_rxd_frag_t irf, bool unload, if_rxsd_t sd,
- int *pf_rv, if_rxd_info_t ri)
- {
- bus_dmamap_t map;
- iflib_fl_t fl;
- caddr_t payload;
- struct mbuf *m;
- int flid, cidx, len, next;
- map = NULL;
- flid = irf->irf_flid;
- cidx = irf->irf_idx;
- fl = &rxq->ifr_fl[flid];
- sd->ifsd_fl = fl;
- 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);
- next = (cidx + CACHE_PTR_INCREMENT) & (fl->ifl_size-1);
- prefetch(&fl->ifl_sds.ifsd_map[next]);
- map = fl->ifl_sds.ifsd_map[cidx];
- bus_dmamap_sync(fl->ifl_buf_tag, map, BUS_DMASYNC_POSTREAD);
- if (rxq->pfil != NULL && PFIL_HOOKED_IN(rxq->pfil) && pf_rv != NULL &&
- irf->irf_len != 0) {
- payload = *sd->ifsd_cl;
- payload += ri->iri_pad;
- len = ri->iri_len - ri->iri_pad;
- *pf_rv = pfil_mem_in(rxq->pfil, payload, len, ri->iri_ifp, &m);
- switch (*pf_rv) {
- case PFIL_DROPPED:
- case PFIL_CONSUMED:
- /*
- * The filter ate it. Everything is recycled.
- */
- m = NULL;
- unload = 0;
- break;
- case PFIL_REALLOCED:
- /*
- * The filter copied it. Everything is recycled.
- * 'm' points at new mbuf.
- */
- unload = 0;
- break;
- case PFIL_PASS:
- /*
- * Filter said it was OK, so receive like
- * normal
- */
- m = fl->ifl_sds.ifsd_m[cidx];
- fl->ifl_sds.ifsd_m[cidx] = NULL;
- break;
- default:
- MPASS(0);
- }
- } else {
- m = fl->ifl_sds.ifsd_m[cidx];
- fl->ifl_sds.ifsd_m[cidx] = NULL;
- if (pf_rv != NULL)
- *pf_rv = PFIL_PASS;
- }
- if (unload && irf->irf_len != 0)
- bus_dmamap_unload(fl->ifl_buf_tag, map);
- fl->ifl_cidx = (fl->ifl_cidx + 1) & (fl->ifl_size-1);
- if (__predict_false(fl->ifl_cidx == 0))
- fl->ifl_gen = 0;
- bit_clear(fl->ifl_rx_bitmap, cidx);
- return (m);
- }
- static struct mbuf *
- assemble_segments(iflib_rxq_t rxq, if_rxd_info_t ri, if_rxsd_t sd, int *pf_rv)
- {
- struct mbuf *m, *mh, *mt;
- caddr_t cl;
- int *pf_rv_ptr, flags, i, padlen;
- bool consumed;
- i = 0;
- mh = NULL;
- consumed = false;
- *pf_rv = PFIL_PASS;
- pf_rv_ptr = pf_rv;
- do {
- m = rxd_frag_to_sd(rxq, &ri->iri_frags[i], !consumed, sd,
- pf_rv_ptr, ri);
- MPASS(*sd->ifsd_cl != NULL);
- /*
- * Exclude zero-length frags & frags from
- * packets the filter has consumed or dropped
- */
- if (ri->iri_frags[i].irf_len == 0 || consumed ||
- *pf_rv == PFIL_CONSUMED || *pf_rv == PFIL_DROPPED) {
- if (mh == NULL) {
- /* everything saved here */
- consumed = true;
- pf_rv_ptr = NULL;
- continue;
- }
- /* XXX we can save the cluster here, but not the mbuf */
- m_init(m, M_NOWAIT, MT_DATA, 0);
- m_free(m);
- continue;
- }
- 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;
- int pf_rv;
- /* 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 != 0 &&
- ri->iri_frags[0].irf_len <= MIN(IFLIB_RX_COPY_THRESH, MHLEN)) {
- m = rxd_frag_to_sd(rxq, &ri->iri_frags[0], false, &sd,
- &pf_rv, ri);
- if (pf_rv != PFIL_PASS && pf_rv != PFIL_REALLOCED)
- return (m);
- if (pf_rv == PFIL_PASS) {
- m_init(m, M_NOWAIT, MT_DATA, M_PKTHDR);
- #ifndef __NO_STRICT_ALIGNMENT
- if (!IP_ALIGNED(m) && ri->iri_pad == 0)
- m->m_data += 2;
- #endif
- memcpy(m->m_data, *sd.ifsd_cl, ri->iri_len);
- m->m_len = ri->iri_frags[0].irf_len;
- m->m_data += ri->iri_pad;
- ri->iri_len -= ri->iri_pad;
- }
- } else {
- m = assemble_segments(rxq, ri, &sd, &pf_rv);
- if (m == NULL)
- return (NULL);
- if (pf_rv != PFIL_PASS && pf_rv != PFIL_REALLOCED)
- return (m);
- }
- 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(if_getvnet(lc->ifp));
- #if defined(INET6)
- *v6 = V_ip6_forwarding;
- #endif
- #if defined(INET)
- *v4 = V_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;
- eh = mtod(m, struct ether_header *);
- switch (eh->ether_type) {
- #if defined(INET6)
- case htons(ETHERTYPE_IPV6):
- return (!v6_forwarding);
- #endif
- #if defined (INET)
- case htons(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 void
- _task_fn_rx_watchdog(void *context)
- {
- iflib_rxq_t rxq = context;
- GROUPTASK_ENQUEUE(&rxq->ifr_task);
- }
- static uint8_t
- iflib_rxeof(iflib_rxq_t rxq, qidx_t budget)
- {
- if_t ifp;
- 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;
- int lro_enabled;
- bool v4_forwarding, v6_forwarding, lro_possible;
- uint8_t retval = 0;
- /*
- * XXX early demux data packets so that if_input processing only handles
- * acks in interrupt context
- */
- struct mbuf *m, *mh, *mt, *mf;
- NET_EPOCH_ASSERT();
- lro_possible = v4_forwarding = v6_forwarding = false;
- 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++)
- retval |= iflib_fl_refill_all(ctx, fl);
- DBG_COUNTER_INC(rx_unavail);
- return (retval);
- }
- /* pfil needs the vnet to be set */
- CURVNET_SET_QUIET(if_getvnet(ifp));
- for (budget_left = budget; budget_left > 0 && avail > 0;) {
- 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;
- rx_pkts += 1;
- rx_bytes += ri.iri_len;
- 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];
- /* 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);
- avail--;
- budget_left--;
- if (avail == 0 && budget_left)
- avail = iflib_rxd_avail(ctx, rxq, *cidxp, budget_left);
- if (__predict_false(m == NULL))
- continue;
- /* imm_pkt: -- cxgb */
- if (mh == NULL)
- mh = mt = m;
- else {
- mt->m_nextpkt = m;
- mt = m;
- }
- }
- CURVNET_RESTORE();
- /* make sure that we can refill faster than drain */
- for (i = 0, fl = &rxq->ifr_fl[0]; i < sctx->isc_nfl; i++, fl++)
- retval |= iflib_fl_refill_all(ctx, fl);
- 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
- #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) {
- if_input(ifp, mf);
- DBG_COUNTER_INC(rx_if_input);
- mt = mf = NULL;
- }
- }
- if ((m->m_pkthdr.csum_flags & (CSUM_L4_CALC|CSUM_L4_VALID)) ==
- (CSUM_L4_CALC|CSUM_L4_VALID)) {
- if (lro_possible && tcp_lro_rx(&rxq->ifr_lc, m, 0) == 0)
- continue;
- }
- }
- #endif
- if (lro_possible) {
- 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) {
- 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 != 0 || iflib_rxd_avail(ctx, rxq, *cidxp, 1) != 0)
- retval |= IFLIB_RXEOF_MORE;
- return (retval);
- err:
- STATE_LOCK(ctx);
- ctx->ifc_flags |= IFC_DO_RESET;
- iflib_admin_intr_deferred(ctx);
- STATE_UNLOCK(ctx);
- return (0);
- }
- #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) MAX((ctx)->ifc_softc_ctx.isc_tx_tso_segments_max, \
- (ctx)->ifc_softc_ctx.isc_tx_nsegments)
- static inline bool
- iflib_txd_db_check(iflib_txq_t txq, int ring)
- {
- if_ctx_t ctx = txq->ift_ctx;
- qidx_t dbval, max;
- max = TXQ_MAX_DB_DEFERRED(txq, txq->ift_in_use);
- /* force || threshold exceeded || at the edge of the ring */
- if (ring || (txq->ift_db_pending >= max) || (TXQ_AVAIL(txq) <= MAX_TX_DESC(ctx) + 2)) {
- /*
- * 'npending' is used if the card's doorbell is in terms of the number of descriptors
- * pending flush (BRCM). 'pidx' is used in cases where the card's doorbeel uses the
- * producer index explicitly (INTC).
- */
- dbval = txq->ift_npending ? txq->ift_npending : txq->ift_pidx;
- bus_dmamap_sync(txq->ift_ifdi->idi_tag, txq->ift_ifdi->idi_map,
- BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);
- ctx->isc_txd_flush(ctx->ifc_softc, txq->ift_id, dbval);
- /*
- * Absent bugs there are zero packets pending so reset pending counts to zero.
- */
- txq->ift_db_pending = txq->ift_npending = 0;
- return (true);
- }
- return (false);
- }
- #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_TX_OFFLOAD4(pi) ((pi)->ipi_csum_flags & (CSUM_IP_TCP | CSUM_IP_TSO))
- #define IS_TSO6(pi) ((pi)->ipi_csum_flags & CSUM_IP6_TSO)
- #define IS_TX_OFFLOAD6(pi) ((pi)->ipi_csum_flags & (CSUM_IP6_TCP | CSUM_IP6_TSO))
- /**
- * Parses out ethernet header information in the given mbuf.
- * Returns in pi: ipi_etype (EtherType) and ipi_ehdrlen (Ethernet header length)
- *
- * This will account for the VLAN header if present.
- *
- * XXX: This doesn't handle QinQ, which could prevent TX offloads for those
- * types of packets.
- */
- static int
- iflib_parse_ether_header(if_pkt_info_t pi, struct mbuf **mp, uint64_t *pullups)
- {
- struct ether_vlan_header *eh;
- struct mbuf *m;
- m = *mp;
- if (__predict_false(m->m_len < sizeof(*eh))) {
- (*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;
- }
- *mp = m;
- return (0);
- }
- /**
- * Parse up to the L3 header and extract IPv4/IPv6 header information into pi.
- * Currently this information includes: IP ToS value, IP header version/presence
- *
- * This is missing some checks and doesn't edit the packet content as it goes,
- * unlike iflib_parse_header(), in order to keep the amount of code here minimal.
- */
- static int
- iflib_parse_header_partial(if_pkt_info_t pi, struct mbuf **mp, uint64_t *pullups)
- {
- struct mbuf *m;
- int err;
- *pullups = 0;
- m = *mp;
- if (!M_WRITABLE(m)) {
- if ((m = m_dup(m, M_NOWAIT)) == NULL) {
- return (ENOMEM);
- } else {
- m_freem(*mp);
- DBG_COUNTER_INC(tx_frees);
- *mp = m;
- }
- }
- /* Fills out pi->ipi_etype */
- err = iflib_parse_ether_header(pi, mp, pullups);
- if (err)
- return (err);
- m = *mp;
- switch (pi->ipi_etype) {
- #ifdef INET
- case ETHERTYPE_IP:
- {
- struct mbuf *n;
- struct ip *ip = NULL;
- int miniplen;
- miniplen = min(m->m_pkthdr.len, pi->ipi_ehdrlen + sizeof(*ip));
- if (__predict_false(m->m_len < miniplen)) {
- /*
- * Check for common case where the first mbuf only contains
- * the Ethernet header
- */
- if (m->m_len == pi->ipi_ehdrlen) {
- n = m->m_next;
- MPASS(n);
- /* If next mbuf contains at least the minimal IP header, then stop */
- if (n->m_len >= sizeof(*ip)) {
- ip = (struct ip *)n->m_data;
- } else {
- (*pullups)++;
- if (__predict_false((m = m_pullup(m, miniplen)) == NULL))
- return (ENOMEM);
- ip = (struct ip *)(m->m_data + pi->ipi_ehdrlen);
- }
- } else {
- (*pullups)++;
- if (__predict_false((m = m_pullup(m, miniplen)) == NULL))
- return (ENOMEM);
- ip = (struct ip *)(m->m_data + pi->ipi_ehdrlen);
- }
- } else {
- ip = (struct ip *)(m->m_data + pi->ipi_ehdrlen);
- }
- /* Have the IPv4 header w/ no options here */
- pi->ipi_ip_hlen = ip->ip_hl << 2;
- pi->ipi_ipproto = ip->ip_p;
- pi->ipi_ip_tos = ip->ip_tos;
- pi->ipi_flags |= IPI_TX_IPV4;
- break;
- }
- #endif
- #ifdef INET6
- case ETHERTYPE_IPV6:
- {
- struct ip6_hdr *ip6;
- if (__predict_false(m->m_len < pi->ipi_ehdrlen + sizeof(struct ip6_hdr))) {
- (*pullups)++;
- if (__predict_false((m = m_pullup(m, pi->ipi_ehdrlen + sizeof(struct ip6_hdr))) == NULL))
- return (ENOMEM);
- }
- ip6 = (struct ip6_hdr *)(m->m_data + pi->ipi_ehdrlen);
- /* Have the IPv6 fixed header here */
- pi->ipi_ip_hlen = sizeof(struct ip6_hdr);
- pi->ipi_ipproto = ip6->ip6_nxt;
- pi->ipi_ip_tos = IPV6_TRAFFIC_CLASS(ip6);
- pi->ipi_flags |= IPI_TX_IPV6;
- break;
- }
- #endif
- default:
- pi->ipi_csum_flags &= ~CSUM_OFFLOAD;
- pi->ipi_ip_hlen = 0;
- break;
- }
- *mp = m;
- return (0);
- }
- 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 mbuf *m;
- int err;
- 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);
- DBG_COUNTER_INC(tx_frees);
- *mp = m;
- }
- }
- /* Fills out pi->ipi_etype */
- err = iflib_parse_ether_header(pi, mp, &txq->ift_pullups);
- if (__predict_false(err))
- return (err);
- m = *mp;
- switch (pi->ipi_etype) {
- #ifdef INET
- case ETHERTYPE_IP:
- {
- struct mbuf *n;
- 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_ip_tos = ip->ip_tos;
- pi->ipi_flags |= IPI_TX_IPV4;
- /* TCP checksum offload may require TCP header length */
- if (IS_TX_OFFLOAD4(pi)) {
- if (__predict_true(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 (IS_TSO4(pi)) {
- if (__predict_false(ip->ip_p != IPPROTO_TCP))
- return (ENXIO);
- /*
- * TSO always requires hardware checksum offload.
- */
- pi->ipi_csum_flags |= (CSUM_IP_TCP | CSUM_IP);
- 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);
- }
- }
- }
- if ((sctx->isc_flags & IFLIB_NEED_ZERO_CSUM) && (pi->ipi_csum_flags & CSUM_IP))
- ip->ip_sum = 0;
- 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))) {
- txq->ift_pullups++;
- 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_ip_tos = IPV6_TRAFFIC_CLASS(ip6);
- pi->ipi_flags |= IPI_TX_IPV6;
- /* TCP checksum offload may require TCP header length */
- if (IS_TX_OFFLOAD6(pi)) {
- if (pi->ipi_ipproto == IPPROTO_TCP) {
- if (__predict_false(m->m_len < pi->ipi_ehdrlen + sizeof(struct ip6_hdr) + sizeof(struct tcphdr))) {
- txq->ift_pullups++;
- 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;
- pi->ipi_tcp_seq = th->th_seq;
- }
- if (IS_TSO6(pi)) {
- if (__predict_false(ip6->ip6_nxt != IPPROTO_TCP))
- return (ENXIO);
- /*
- * TSO always requires hardware checksum offload.
- */
- pi->ipi_csum_flags |= CSUM_IP6_TCP;
- 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);
- }
- /*
- * 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, pidx;
- struct mbuf *m, **ifsd_m;
- ifsd_m = txq->ift_sds.ifsd_m;
- ntxd = txq->ift_size;
- pidx = txq->ift_pidx & (ntxd - 1);
- ifsd_m = txq->ift_sds.ifsd_m;
- m = ifsd_m[pidx];
- ifsd_m[pidx] = NULL;
- bus_dmamap_unload(txq->ift_buf_tag, txq->ift_sds.ifsd_map[pidx]);
- if (txq->ift_sds.ifsd_tso_map != NULL)
- bus_dmamap_unload(txq->ift_tso_buf_tag,
- txq->ift_sds.ifsd_tso_map[pidx]);
- #if MEMORY_LOGGING
- txq->ift_dequeued++;
- #endif
- return (m);
- }
- 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);
- DBG_COUNTER_INC(tx_frees);
- 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);
- DBG_COUNTER_INC(tx_frees);
- 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_tag_t buf_tag;
- bus_dma_segment_t *segs;
- struct mbuf *m_head, **ifsd_m;
- 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;
- 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]);
- prefetch(&txq->ift_sds.ifsd_map[next]);
- next = (cidx + CACHE_LINE_SIZE) & (ntxd-1);
- }
- map = txq->ift_sds.ifsd_map[pidx];
- ifsd_m = txq->ift_sds.ifsd_m;
- if (m_head->m_pkthdr.csum_flags & CSUM_TSO) {
- buf_tag = txq->ift_tso_buf_tag;
- max_segs = scctx->isc_tx_tso_segments_max;
- map = txq->ift_sds.ifsd_tso_map[pidx];
- MPASS(buf_tag != NULL);
- MPASS(max_segs > 0);
- } else {
- buf_tag = txq->ift_buf_tag;
- max_segs = scctx->isc_tx_nsegments;
- map = txq->ift_sds.ifsd_map[pidx];
- }
- 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) {
- DBG_COUNTER_INC(encap_txd_encap_fail);
- 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_HAS_VLANTAG(m_head) ? 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)) {
- DBG_COUNTER_INC(encap_txd_encap_fail);
- return (err);
- }
- m_head = *m_headp;
- }
- retry:
- err = bus_dmamap_load_mbuf_sg(buf_tag, map, m_head, segs, &nsegs,
- 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);
- /* try defrag if collapsing fails */
- if (m_head == NULL)
- remap++;
- }
- if (remap == 1) {
- txq->ift_mbuf_defrag++;
- m_head = m_defrag(*m_headp, M_NOWAIT);
- }
- /*
- * remap should never be >1 unless bus_dmamap_load_mbuf_sg
- * failed to map an mbuf that was run through m_defrag
- */
- MPASS(remap <= 1);
- if (__predict_false(m_head == NULL || remap > 1))
- goto defrag_failed;
- remap++;
- *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);
- DBG_COUNTER_INC(encap_txd_encap_fail);
- return (err);
- }
- ifsd_m[pidx] = m_head;
- /*
- * 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++;
- bus_dmamap_unload(buf_tag, map);
- DBG_COUNTER_INC(encap_txq_avail_fail);
- DBG_COUNTER_INC(encap_txd_encap_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) <= MAX_TX_DESC(ctx) + 2) {
- 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 ((err = ctx->isc_txd_encap(ctx->ifc_softc, &pi)) == 0) {
- bus_dmamap_sync(buf_tag, map, 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;
- txq->ift_db_pending += 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 {
- *m_headp = m_head = iflib_remove_mbuf(txq);
- if (err == EFBIG) {
- txq->ift_txd_encap_efbig++;
- if (remap < 2) {
- remap = 1;
- goto defrag;
- }
- }
- goto defrag_failed;
- }
- /*
- * err can't possibly be non-zero here, so we don't neet to test it
- * to see if we need to 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;
- DBG_COUNTER_INC(encap_txd_encap_fail);
- return (ENOMEM);
- }
- static void
- iflib_tx_desc_free(iflib_txq_t txq, int n)
- {
- uint32_t qsize, cidx, mask, gen;
- struct mbuf *m, **ifsd_m;
- bool do_prefetch;
- cidx = txq->ift_cidx;
- gen = txq->ift_gen;
- qsize = txq->ift_size;
- mask = qsize-1;
- ifsd_m = txq->ift_sds.ifsd_m;
- do_prefetch = (txq->ift_ctx->ifc_flags & IFC_PREFETCH);
- while (n-- > 0) {
- if (do_prefetch) {
- prefetch(ifsd_m[(cidx + 3) & mask]);
- prefetch(ifsd_m[(cidx + 4) & mask]);
- }
- if ((m = ifsd_m[cidx]) != NULL) {
- prefetch(&ifsd_m[(cidx + CACHE_PTR_INCREMENT) & mask]);
- if (m->m_pkthdr.csum_flags & CSUM_TSO) {
- bus_dmamap_sync(txq->ift_tso_buf_tag,
- txq->ift_sds.ifsd_tso_map[cidx],
- BUS_DMASYNC_POSTWRITE);
- bus_dmamap_unload(txq->ift_tso_buf_tag,
- txq->ift_sds.ifsd_tso_map[cidx]);
- } else {
- bus_dmamap_sync(txq->ift_buf_tag,
- txq->ift_sds.ifsd_map[cidx],
- BUS_DMASYNC_POSTWRITE);
- bus_dmamap_unload(txq->ift_buf_tag,
- txq->ift_sds.ifsd_map[cidx]);
- }
- /* XXX we don't support any drivers that batch packets yet */
- MPASS(m->m_nextpkt == NULL);
- m_freem(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;
- if (TXQ_AVAIL(txq) > MAX_TX_DESC(ctx) + 2)
- return (1);
- bus_dmamap_sync(txq->ift_ifdi->idi_tag, txq->ift_ifdi->idi_map,
- BUS_DMASYNC_POSTREAD);
- return (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;
- if_t ifp = ctx->ifc_ifp;
- struct mbuf *m, **mp;
- int avail, bytes_sent, skipped, count, err, i;
- int mcast_sent, pkt_sent, reclaimed;
- bool do_prefetch, rang, ring;
- 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(txq, reclaimed && txq->ift_db_pending);
- avail = IDXDIFF(pidx, cidx, r->size);
- if (__predict_false(ctx->ifc_flags & IFC_QFLUSH)) {
- /*
- * The driver is unloading so we need to free all pending packets.
- */
- DBG_COUNTER_INC(txq_drain_flushing);
- for (i = 0; i < avail; i++) {
- if (__predict_true(r->items[(cidx + i) & (r->size-1)] != (void *)txq))
- m_freem(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 we've reclaimed any packets this queue cannot be hung.
- */
- if (reclaimed)
- txq->ift_qstatus = IFLIB_QUEUE_IDLE;
- skipped = 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);
- err = 0;
- for (i = 0; i < count && TXQ_AVAIL(txq) >= MAX_TX_DESC(ctx) + 2; i++) {
- int rem = do_prefetch ? count - i : 0;
- mp = _ring_peek_one(r, cidx, i, rem);
- MPASS(mp != NULL && *mp != NULL);
- /*
- * Completion interrupts will use the address of the txq
- * as a sentinel to enqueue _something_ in order to acquire
- * the lock on the mp_ring (there's no direct lock call).
- * We obviously whave to check for these sentinel cases
- * and skip them.
- */
- if (__predict_false(*mp == (struct mbuf *)txq)) {
- skipped++;
- continue;
- }
- err = iflib_encap(txq, mp);
- if (__predict_false(err)) {
- /* no room - bail out */
- if (err == ENOBUFS)
- break;
- skipped++;
- /* we can't send this packet - skip it */
- continue;
- }
- pkt_sent++;
- m = *mp;
- DBG_COUNTER_INC(tx_sent);
- bytes_sent += m->m_pkthdr.len;
- mcast_sent += !!(m->m_flags & M_MCAST);
- if (__predict_false(!(if_getdrvflags(ifp) & IFF_DRV_RUNNING)))
- break;
- ETHER_BPF_MTAP(ifp, m);
- rang = iflib_txd_db_check(txq, false);
- }
- /* deliberate use of bitwise or to avoid gratuitous short-circuit */
- ring = rang ? false : (iflib_min_tx_latency | err);
- iflib_txd_db_check(txq, ring);
- 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", skipped + pkt_sent);
- #endif
- return (skipped + pkt_sent);
- }
- 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);
- DBG_COUNTER_INC(tx_frees);
- }
- 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;
- if_t ifp = ctx->ifc_ifp;
- int abdicate = ctx->ifc_sysctl_tx_abdicate;
- #ifdef IFLIB_DIAGNOSTICS
- txq->ift_cpu_exec_count[curcpu]++;
- #endif
- if (!(if_getdrvflags(ifp) & IFF_DRV_RUNNING))
- return;
- #ifdef DEV_NETMAP
- if ((if_getcapenable(ifp) & IFCAP_NETMAP) &&
- netmap_tx_irq(ifp, txq->ift_id))
- goto skip_ifmp;
- #endif
- #ifdef ALTQ
- if (if_altq_is_enabled(ifp))
- iflib_altq_if_start(ifp);
- #endif
- if (txq->ift_db_pending)
- ifmp_ring_enqueue(txq->ift_br, (void **)&txq, 1, TX_BATCH_SIZE, abdicate);
- else if (!abdicate)
- ifmp_ring_check_drainage(txq->ift_br, TX_BATCH_SIZE);
- /*
- * When abdicating, we always need to check drainage, not just when we don't enqueue
- */
- if (abdicate)
- ifmp_ring_check_drainage(txq->ift_br, TX_BATCH_SIZE);
- #ifdef DEV_NETMAP
- skip_ifmp:
- #endif
- if (ctx->ifc_flags & IFC_LEGACY)
- IFDI_INTR_ENABLE(ctx);
- else
- IFDI_TX_QUEUE_INTR_ENABLE(ctx, txq->ift_id);
- }
- static void
- _task_fn_rx(void *context)
- {
- iflib_rxq_t rxq = context;
- if_ctx_t ctx = rxq->ifr_ctx;
- uint8_t more;
- uint16_t budget;
- #ifdef DEV_NETMAP
- u_int work = 0;
- int nmirq;
- #endif
- #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;
- #ifdef DEV_NETMAP
- nmirq = netmap_rx_irq(ctx->ifc_ifp, rxq->ifr_id, &work);
- if (nmirq != NM_IRQ_PASS) {
- more = (nmirq == NM_IRQ_RESCHED) ? IFLIB_RXEOF_MORE : 0;
- goto skip_rxeof;
- }
- #endif
- budget = ctx->ifc_sysctl_rx_budget;
- if (budget == 0)
- budget = 16; /* XXX */
- more = iflib_rxeof(rxq, budget);
- #ifdef DEV_NETMAP
- skip_rxeof:
- #endif
- if ((more & IFLIB_RXEOF_MORE) == 0) {
- if (ctx->ifc_flags & IFC_LEGACY)
- IFDI_INTR_ENABLE(ctx);
- else
- IFDI_RX_QUEUE_INTR_ENABLE(ctx, rxq->ifr_id);
- DBG_COUNTER_INC(rx_intr_enables);
- }
- if (__predict_false(!(if_getdrvflags(ctx->ifc_ifp) & IFF_DRV_RUNNING)))
- return;
- if (more & IFLIB_RXEOF_MORE)
- GROUPTASK_ENQUEUE(&rxq->ifr_task);
- else if (more & IFLIB_RXEOF_EMPTY)
- callout_reset_curcpu(&rxq->ifr_watchdog, 1, &_task_fn_rx_watchdog, rxq);
- }
- 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;
- bool oactive, running, do_reset, do_watchdog, in_detach;
- STATE_LOCK(ctx);
- running = (if_getdrvflags(ctx->ifc_ifp) & IFF_DRV_RUNNING);
- oactive = (if_getdrvflags(ctx->ifc_ifp) & IFF_DRV_OACTIVE);
- do_reset = (ctx->ifc_flags & IFC_DO_RESET);
- do_watchdog = (ctx->ifc_flags & IFC_DO_WATCHDOG);
- in_detach = (ctx->ifc_flags & IFC_IN_DETACH);
- ctx->ifc_flags &= ~(IFC_DO_RESET|IFC_DO_WATCHDOG);
- STATE_UNLOCK(ctx);
- if ((!running && !oactive) && !(ctx->ifc_sctx->isc_flags & IFLIB_ADMIN_ALWAYS_RUN))
- return;
- if (in_detach)
- 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);
- }
- if (ctx->ifc_sctx->isc_flags & IFLIB_HAS_ADMINCQ)
- IFDI_ADMIN_COMPLETION_HANDLE(ctx);
- if (do_watchdog) {
- ctx->ifc_watchdog_events++;
- IFDI_WATCHDOG_RESET(ctx);
- }
- IFDI_UPDATE_ADMIN_STATUS(ctx);
- for (txq = ctx->ifc_txqs, i = 0; i < sctx->isc_ntxqsets; i++, txq++) {
- callout_reset_on(&txq->ift_timer, iflib_timer_default, iflib_timer, txq,
- txq->ift_timer.c_cpu);
- }
- IFDI_LINK_INTR_ENABLE(ctx);
- if (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) &&
- !(ctx->ifc_sctx->isc_flags & IFLIB_ADMIN_ALWAYS_RUN))
- 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;
- int abdicate;
- if (__predict_false((if_getdrvflags(ifp) & IFF_DRV_RUNNING) == 0 || !LINK_ACTIVE(ctx))) {
- DBG_COUNTER_INC(tx_frees);
- m_freem(m);
- return (ENETDOWN);
- }
- MPASS(m->m_nextpkt == NULL);
- /* ALTQ-enabled interfaces always use queue 0. */
- qidx = 0;
- /* Use driver-supplied queue selection method if it exists */
- if (ctx->isc_txq_select_v2) {
- struct if_pkt_info pi;
- uint64_t early_pullups = 0;
- pkt_info_zero(&pi);
- err = iflib_parse_header_partial(&pi, &m, &early_pullups);
- if (__predict_false(err != 0)) {
- /* Assign pullups for bad pkts to default queue */
- ctx->ifc_txqs[0].ift_pullups += early_pullups;
- DBG_COUNTER_INC(encap_txd_encap_fail);
- return (err);
- }
- /* Let driver make queueing decision */
- qidx = ctx->isc_txq_select_v2(ctx->ifc_softc, m, &pi);
- ctx->ifc_txqs[qidx].ift_pullups += early_pullups;
- }
- /* Backwards compatibility w/ simpler queue select */
- else if (ctx->isc_txq_select)
- qidx = ctx->isc_txq_select(ctx->ifc_softc, m);
- /* If not, use iflib's standard method */
- else if ((NTXQSETS(ctx) > 1) && M_HASHTYPE_GET(m) && !if_altq_is_enabled(ifp))
- qidx = QIDX(ctx, m);
- /* Set TX queue */
- 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);
- DBG_COUNTER_INC(tx_frees);
- 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);
- abdicate = ctx->ifc_sysctl_tx_abdicate;
- err = ifmp_ring_enqueue(txq->ift_br, (void **)&m, 1, TX_BATCH_SIZE, abdicate);
- if (abdicate)
- GROUPTASK_ENQUEUE(&txq->ift_task);
- if (err) {
- if (!abdicate)
- GROUPTASK_ENQUEUE(&txq->ift_task);
- /* support forthcoming later */
- #ifdef DRIVER_BACKPRESSURE
- txq->ift_closed = TRUE;
- #endif
- ifmp_ring_check_drainage(txq->ift_br, TX_BATCH_SIZE);
- m_freem(m);
- DBG_COUNTER_INC(tx_frees);
- }
- return (err);
- }
- #ifdef ALTQ
- /*
- * The overall approach to integrating iflib with ALTQ is to continue to use
- * the iflib mp_ring machinery between the ALTQ queue(s) and the hardware
- * ring. Technically, when using ALTQ, queueing to an intermediate mp_ring
- * is redundant/unnecessary, but doing so minimizes the amount of
- * ALTQ-specific code required in iflib. It is assumed that the overhead of
- * redundantly queueing to an intermediate mp_ring is swamped by the
- * performance limitations inherent in using ALTQ.
- *
- * When ALTQ support is compiled in, all iflib drivers will use a transmit
- * routine, iflib_altq_if_transmit(), that checks if ALTQ is enabled for the
- * given interface. If ALTQ is enabled for an interface, then all
- * transmitted packets for that interface will be submitted to the ALTQ
- * subsystem via IFQ_ENQUEUE(). We don't use the legacy if_transmit()
- * implementation because it uses IFQ_HANDOFF(), which will duplicatively
- * update stats that the iflib machinery handles, and which is sensitve to
- * the disused IFF_DRV_OACTIVE flag. Additionally, iflib_altq_if_start()
- * will be installed as the start routine for use by ALTQ facilities that
- * need to trigger queue drains on a scheduled basis.
- *
- */
- static void
- iflib_altq_if_start(if_t ifp)
- {
- struct ifaltq *ifq = &ifp->if_snd; /* XXX - DRVAPI */
- struct mbuf *m;
- IFQ_LOCK(ifq);
- IFQ_DEQUEUE_NOLOCK(ifq, m);
- while (m != NULL) {
- iflib_if_transmit(ifp, m);
- IFQ_DEQUEUE_NOLOCK(ifq, m);
- }
- IFQ_UNLOCK(ifq);
- }
- static int
- iflib_altq_if_transmit(if_t ifp, struct mbuf *m)
- {
- int err;
- if (if_altq_is_enabled(ifp)) {
- IFQ_ENQUEUE(&ifp->if_snd, m, err); /* XXX - DRVAPI */
- if (err == 0)
- iflib_altq_if_start(ifp);
- } else
- err = iflib_if_transmit(ifp, m);
- return (err);
- }
- #endif /* ALTQ */
- static void
- iflib_if_qflush(if_t ifp)
- {
- if_ctx_t ctx = if_getsoftc(ifp);
- iflib_txq_t txq = ctx->ifc_txqs;
- int i;
- STATE_LOCK(ctx);
- ctx->ifc_flags |= IFC_QFLUSH;
- STATE_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);
- STATE_LOCK(ctx);
- ctx->ifc_flags &= ~IFC_QFLUSH;
- STATE_UNLOCK(ctx);
- /*
- * When ALTQ is enabled, this will also take care of purging the
- * ALTQ queue(s).
- */
- if_qflush(ifp);
- }
- #define IFCAP_FLAGS (IFCAP_HWCSUM_IPV6 | IFCAP_HWCSUM | IFCAP_LRO | \
- IFCAP_TSO | IFCAP_VLAN_HWTAGGING | IFCAP_HWSTATS | \
- IFCAP_VLAN_MTU | IFCAP_VLAN_HWFILTER | \
- IFCAP_VLAN_HWTSO | IFCAP_VLAN_HWCSUM | IFCAP_MEXTPG)
- 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) {
- STATE_LOCK(ctx);
- if (ifr->ifr_mtu > ctx->ifc_max_fl_buf_size)
- ctx->ifc_flags |= IFC_MULTISEG;
- else
- ctx->ifc_flags &= ~IFC_MULTISEG;
- STATE_UNLOCK(ctx);
- err = if_setmtu(ifp, ifr->ifr_mtu);
- }
- iflib_init_locked(ctx);
- STATE_LOCK(ctx);
- if_setdrvflags(ifp, bits);
- STATE_UNLOCK(ctx);
- 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)) {
- CTX_UNLOCK(ctx);
- err = IFDI_PROMISC_SET(ctx, if_getflags(ifp));
- CTX_LOCK(ctx);
- }
- } 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);
- /* FALLTHROUGH */
- case SIOCGIFMEDIA:
- case SIOCGIFXMEDIA:
- err = ifmedia_ioctl(ifp, ifr, ctx->ifc_mediap, command);
- break;
- case SIOCGI2C:
- {
- struct ifi2creq i2c;
- err = copyin(ifr_data_get_ptr(ifr), &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_data_get_ptr(ifr),
- sizeof(i2c));
- break;
- }
- case SIOCSIFCAP:
- {
- int mask, setmask, oldmask;
- oldmask = if_getcapenable(ifp);
- mask = ifr->ifr_reqcap ^ oldmask;
- mask &= ctx->ifc_softc_ctx.isc_capabilities | IFCAP_MEXTPG;
- setmask = 0;
- #ifdef TCP_OFFLOAD
- setmask |= mask & (IFCAP_TOE4|IFCAP_TOE6);
- #endif
- setmask |= (mask & IFCAP_FLAGS);
- setmask |= (mask & IFCAP_WOL);
- /*
- * If any RX csum has changed, change all the ones that
- * are supported by the driver.
- */
- if (setmask & (IFCAP_RXCSUM | IFCAP_RXCSUM_IPV6)) {
- setmask |= ctx->ifc_softc_ctx.isc_capabilities &
- (IFCAP_RXCSUM | IFCAP_RXCSUM_IPV6);
- }
- /*
- * 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 && setmask & ~IFCAP_WOL)
- iflib_stop(ctx);
- STATE_LOCK(ctx);
- if_togglecapenable(ifp, setmask);
- ctx->ifc_softc_ctx.isc_capenable ^= setmask;
- STATE_UNLOCK(ctx);
- if (bits & IFF_DRV_RUNNING && setmask & ~IFCAP_WOL)
- iflib_init_locked(ctx);
- STATE_LOCK(ctx);
- if_setdrvflags(ifp, bits);
- STATE_UNLOCK(ctx);
- CTX_UNLOCK(ctx);
- }
- if_vlancap(ifp);
- 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;
- if (iflib_in_detach(ctx))
- return;
- CTX_LOCK(ctx);
- /* Driver may need all untagged packets to be flushed */
- if (IFDI_NEEDS_RESTART(ctx, IFLIB_RESTART_VLAN_CONFIG))
- iflib_stop(ctx);
- IFDI_VLAN_REGISTER(ctx, vtag);
- /* Re-init to load the changes, if required */
- if (IFDI_NEEDS_RESTART(ctx, IFLIB_RESTART_VLAN_CONFIG))
- iflib_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);
- /* Driver may need all tagged packets to be flushed */
- if (IFDI_NEEDS_RESTART(ctx, IFLIB_RESTART_VLAN_CONFIG))
- iflib_stop(ctx);
- IFDI_VLAN_UNREGISTER(ctx, vtag);
- /* Re-init to load the changes, if required */
- if (IFDI_NEEDS_RESTART(ctx, IFLIB_RESTART_VLAN_CONFIG))
- iflib_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)
- {
- const pci_vendor_info_t *ent;
- if_shared_ctx_t sctx;
- uint16_t pci_device_id, pci_rev_id, pci_subdevice_id, pci_subvendor_id;
- uint16_t pci_vendor_id;
- 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_probe_vendor(device_t dev)
- {
- int probe;
- probe = iflib_device_probe(dev);
- if (probe == BUS_PROBE_DEFAULT)
- return (BUS_PROBE_VENDOR);
- else
- return (probe);
- }
- static void
- iflib_reset_qvalues(if_ctx_t ctx)
- {
- if_softc_ctx_t scctx = &ctx->ifc_softc_ctx;
- if_shared_ctx_t sctx = ctx->ifc_sctx;
- device_t dev = ctx->ifc_dev;
- int i;
- 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];
- }
- if (!powerof2(scctx->isc_nrxd[i])) {
- device_printf(dev, "nrxd%d: %d is not a power of 2 - using default value of %d\n",
- i, scctx->isc_nrxd[i], sctx->isc_nrxd_default[i]);
- scctx->isc_nrxd[i] = sctx->isc_nrxd_default[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 (!powerof2(scctx->isc_ntxd[i])) {
- device_printf(dev, "ntxd%d: %d is not a power of 2 - using default value of %d\n",
- i, scctx->isc_ntxd[i], sctx->isc_ntxd_default[i]);
- scctx->isc_ntxd[i] = sctx->isc_ntxd_default[i];
- }
- }
- }
- static void
- iflib_add_pfil(if_ctx_t ctx)
- {
- struct pfil_head *pfil;
- struct pfil_head_args pa;
- iflib_rxq_t rxq;
- int i;
- pa.pa_version = PFIL_VERSION;
- pa.pa_flags = PFIL_IN;
- pa.pa_type = PFIL_TYPE_ETHERNET;
- pa.pa_headname = if_name(ctx->ifc_ifp);
- pfil = pfil_head_register(&pa);
- for (i = 0, rxq = ctx->ifc_rxqs; i < NRXQSETS(ctx); i++, rxq++) {
- rxq->pfil = pfil;
- }
- }
- static void
- iflib_rem_pfil(if_ctx_t ctx)
- {
- struct pfil_head *pfil;
- iflib_rxq_t rxq;
- int i;
- rxq = ctx->ifc_rxqs;
- pfil = rxq->pfil;
- for (i = 0; i < NRXQSETS(ctx); i++, rxq++) {
- rxq->pfil = NULL;
- }
- pfil_head_unregister(pfil);
- }
- /*
- * Advance forward by n members of the cpuset ctx->ifc_cpus starting from
- * cpuid and wrapping as necessary.
- */
- static unsigned int
- cpuid_advance(if_ctx_t ctx, unsigned int cpuid, unsigned int n)
- {
- unsigned int first_valid;
- unsigned int last_valid;
- /* cpuid should always be in the valid set */
- MPASS(CPU_ISSET(cpuid, &ctx->ifc_cpus));
- /* valid set should never be empty */
- MPASS(!CPU_EMPTY(&ctx->ifc_cpus));
- first_valid = CPU_FFS(&ctx->ifc_cpus) - 1;
- last_valid = CPU_FLS(&ctx->ifc_cpus) - 1;
- n = n % CPU_COUNT(&ctx->ifc_cpus);
- while (n > 0) {
- do {
- cpuid++;
- if (cpuid > last_valid)
- cpuid = first_valid;
- } while (!CPU_ISSET(cpuid, &ctx->ifc_cpus));
- n--;
- }
- return (cpuid);
- }
- #if defined(SMP) && defined(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 an L2 neighbor of the given CPU or return -1 if none found. This
- * does not distinguish among multiple L2 neighbors if the given CPU has
- * more than one (it will always return the same result in that case).
- */
- static int
- find_l2_neighbor(int cpu)
- {
- struct cpu_group *grp;
- int i;
- grp = cpu_top;
- if (grp == NULL)
- return -1;
- /*
- * Find the smallest CPU group that contains the given core.
- */
- i = 0;
- while ((i = find_child_with_core(cpu, grp)) != -1) {
- /*
- * If the smallest group containing the given CPU has less
- * than two members, we conclude the given CPU has no
- * L2 neighbor.
- */
- if (grp->cg_child[i].cg_count <= 1)
- return (-1);
- grp = &grp->cg_child[i];
- }
- /* Must share L2. */
- if (grp->cg_level > CG_SHARE_L2 || grp->cg_level == CG_SHARE_NONE)
- return -1;
- /*
- * Select the first member of the set that isn't the reference
- * CPU, which at this point is guaranteed to exist.
- */
- for (i = 0; i < CPU_SETSIZE; i++) {
- if (CPU_ISSET(i, &grp->cg_mask) && i != cpu)
- return (i);
- }
- /* Should never be reached */
- return (-1);
- }
- #else
- static int
- find_l2_neighbor(int cpu)
- {
- return (-1);
- }
- #endif
- /*
- * CPU mapping behaviors
- * ---------------------
- * 'separate txrx' refers to the separate_txrx sysctl
- * 'use logical' refers to the use_logical_cores sysctl
- * 'INTR CPUS' indicates whether bus_get_cpus(INTR_CPUS) succeeded
- *
- * separate use INTR
- * txrx logical CPUS result
- * ---------- --------- ------ ------------------------------------------------
- * - - X RX and TX queues mapped to consecutive physical
- * cores with RX/TX pairs on same core and excess
- * of either following
- * - X X RX and TX queues mapped to consecutive cores
- * of any type with RX/TX pairs on same core and
- * excess of either following
- * X - X RX and TX queues mapped to consecutive physical
- * cores; all RX then all TX
- * X X X RX queues mapped to consecutive physical cores
- * first, then TX queues mapped to L2 neighbor of
- * the corresponding RX queue if one exists,
- * otherwise to consecutive physical cores
- * - n/a - RX and TX queues mapped to consecutive cores of
- * any type with RX/TX pairs on same core and excess
- * of either following
- * X n/a - RX and TX queues mapped to consecutive cores of
- * any type; all RX then all TX
- */
- static unsigned int
- get_cpuid_for_queue(if_ctx_t ctx, unsigned int base_cpuid, unsigned int qid,
- bool is_tx)
- {
- if_softc_ctx_t scctx = &ctx->ifc_softc_ctx;
- unsigned int core_index;
- if (ctx->ifc_sysctl_separate_txrx) {
- /*
- * When using separate CPUs for TX and RX, the assignment
- * will always be of a consecutive CPU out of the set of
- * context CPUs, except for the specific case where the
- * context CPUs are phsyical cores, the use of logical cores
- * has been enabled, the assignment is for TX, the TX qid
- * corresponds to an RX qid, and the CPU assigned to the
- * corresponding RX queue has an L2 neighbor.
- */
- if (ctx->ifc_sysctl_use_logical_cores &&
- ctx->ifc_cpus_are_physical_cores &&
- is_tx && qid < scctx->isc_nrxqsets) {
- int l2_neighbor;
- unsigned int rx_cpuid;
- rx_cpuid = cpuid_advance(ctx, base_cpuid, qid);
- l2_neighbor = find_l2_neighbor(rx_cpuid);
- if (l2_neighbor != -1) {
- return (l2_neighbor);
- }
- /*
- * ... else fall through to the normal
- * consecutive-after-RX assignment scheme.
- *
- * Note that we are assuming that all RX queue CPUs
- * have an L2 neighbor, or all do not. If a mixed
- * scenario is possible, we will have to keep track
- * separately of how many queues prior to this one
- * were not able to be assigned to an L2 neighbor.
- */
- }
- if (is_tx)
- core_index = scctx->isc_nrxqsets + qid;
- else
- core_index = qid;
- } else {
- core_index = qid;
- }
- return (cpuid_advance(ctx, base_cpuid, core_index));
- }
- static uint16_t
- get_ctx_core_offset(if_ctx_t ctx)
- {
- if_softc_ctx_t scctx = &ctx->ifc_softc_ctx;
- struct cpu_offset *op;
- cpuset_t assigned_cpus;
- unsigned int cores_consumed;
- unsigned int base_cpuid = ctx->ifc_sysctl_core_offset;
- unsigned int first_valid;
- unsigned int last_valid;
- unsigned int i;
- first_valid = CPU_FFS(&ctx->ifc_cpus) - 1;
- last_valid = CPU_FLS(&ctx->ifc_cpus) - 1;
- if (base_cpuid != CORE_OFFSET_UNSPECIFIED) {
- /*
- * Align the user-chosen base CPU ID to the next valid CPU
- * for this device. If the chosen base CPU ID is smaller
- * than the first valid CPU or larger than the last valid
- * CPU, we assume the user does not know what the valid
- * range is for this device and is thinking in terms of a
- * zero-based reference frame, and so we shift the given
- * value into the valid range (and wrap accordingly) so the
- * intent is translated to the proper frame of reference.
- * If the base CPU ID is within the valid first/last, but
- * does not correspond to a valid CPU, it is advanced to the
- * next valid CPU (wrapping if necessary).
- */
- if (base_cpuid < first_valid || base_cpuid > last_valid) {
- /* shift from zero-based to first_valid-based */
- base_cpuid += first_valid;
- /* wrap to range [first_valid, last_valid] */
- base_cpuid = (base_cpuid - first_valid) %
- (last_valid - first_valid + 1);
- }
- if (!CPU_ISSET(base_cpuid, &ctx->ifc_cpus)) {
- /*
- * base_cpuid is in [first_valid, last_valid], but
- * not a member of the valid set. In this case,
- * there will always be a member of the valid set
- * with a CPU ID that is greater than base_cpuid,
- * and we simply advance to it.
- */
- while (!CPU_ISSET(base_cpuid, &ctx->ifc_cpus))
- base_cpuid++;
- }
- return (base_cpuid);
- }
- /*
- * Determine how many cores will be consumed by performing the CPU
- * assignments and counting how many of the assigned CPUs correspond
- * to CPUs in the set of context CPUs. This is done using the CPU
- * ID first_valid as the base CPU ID, as the base CPU must be within
- * the set of context CPUs.
- *
- * Note not all assigned CPUs will be in the set of context CPUs
- * when separate CPUs are being allocated to TX and RX queues,
- * assignment to logical cores has been enabled, the set of context
- * CPUs contains only physical CPUs, and TX queues are mapped to L2
- * neighbors of CPUs that RX queues have been mapped to - in this
- * case we do only want to count how many CPUs in the set of context
- * CPUs have been consumed, as that determines the next CPU in that
- * set to start allocating at for the next device for which
- * core_offset is not set.
- */
- CPU_ZERO(&assigned_cpus);
- for (i = 0; i < scctx->isc_ntxqsets; i++)
- CPU_SET(get_cpuid_for_queue(ctx, first_valid, i, true),
- &assigned_cpus);
- for (i = 0; i < scctx->isc_nrxqsets; i++)
- CPU_SET(get_cpuid_for_queue(ctx, first_valid, i, false),
- &assigned_cpus);
- CPU_AND(&assigned_cpus, &assigned_cpus, &ctx->ifc_cpus);
- cores_consumed = CPU_COUNT(&assigned_cpus);
- mtx_lock(&cpu_offset_mtx);
- SLIST_FOREACH(op, &cpu_offsets, entries) {
- if (CPU_CMP(&ctx->ifc_cpus, &op->set) == 0) {
- base_cpuid = op->next_cpuid;
- op->next_cpuid = cpuid_advance(ctx, op->next_cpuid,
- cores_consumed);
- MPASS(op->refcount < UINT_MAX);
- op->refcount++;
- break;
- }
- }
- if (base_cpuid == CORE_OFFSET_UNSPECIFIED) {
- base_cpuid = first_valid;
- op = malloc(sizeof(struct cpu_offset), M_IFLIB,
- M_NOWAIT | M_ZERO);
- if (op == NULL) {
- device_printf(ctx->ifc_dev,
- "allocation for cpu offset failed.\n");
- } else {
- op->next_cpuid = cpuid_advance(ctx, base_cpuid,
- cores_consumed);
- op->refcount = 1;
- CPU_COPY(&ctx->ifc_cpus, &op->set);
- SLIST_INSERT_HEAD(&cpu_offsets, op, entries);
- }
- }
- mtx_unlock(&cpu_offset_mtx);
- return (base_cpuid);
- }
- static void
- unref_ctx_core_offset(if_ctx_t ctx)
- {
- struct cpu_offset *op, *top;
- mtx_lock(&cpu_offset_mtx);
- SLIST_FOREACH_SAFE(op, &cpu_offsets, entries, top) {
- if (CPU_CMP(&ctx->ifc_cpus, &op->set) == 0) {
- MPASS(op->refcount > 0);
- op->refcount--;
- if (op->refcount == 0) {
- SLIST_REMOVE(&cpu_offsets, op, cpu_offset, entries);
- free(op, M_IFLIB);
- }
- break;
- }
- }
- mtx_unlock(&cpu_offset_mtx);
- }
- int
- iflib_device_register(device_t dev, void *sc, if_shared_ctx_t sctx, if_ctx_t *ctxp)
- {
- if_ctx_t ctx;
- if_t ifp;
- if_softc_ctx_t scctx;
- kobjop_desc_t kobj_desc;
- kobj_method_t *kobj_method;
- int err, msix, rid;
- int num_txd, num_rxd;
- 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);
- goto fail_ctx_free;
- }
- iflib_add_device_sysctl_pre(ctx);
- scctx = &ctx->ifc_softc_ctx;
- ifp = ctx->ifc_ifp;
- iflib_reset_qvalues(ctx);
- IFNET_WLOCK();
- CTX_LOCK(ctx);
- if ((err = IFDI_ATTACH_PRE(ctx)) != 0) {
- device_printf(dev, "IFDI_ATTACH_PRE failed %d\n", err);
- goto fail_unlock;
- }
- _iflib_pre_assert(scctx);
- ctx->ifc_txrx = *scctx->isc_txrx;
- MPASS(scctx->isc_dma_width <= flsll(BUS_SPACE_MAXADDR));
- if (sctx->isc_flags & IFLIB_DRIVER_MEDIA)
- ctx->ifc_mediap = scctx->isc_media;
- #ifdef INVARIANTS
- if (scctx->isc_capabilities & IFCAP_TXCSUM)
- MPASS(scctx->isc_tx_csum_flags);
- #endif
- if_setcapabilities(ifp,
- scctx->isc_capabilities | IFCAP_HWSTATS | IFCAP_MEXTPG);
- if_setcapenable(ifp,
- scctx->isc_capenable | IFCAP_HWSTATS | IFCAP_MEXTPG);
- 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;
- num_txd = iflib_num_tx_descs(ctx);
- num_rxd = iflib_num_rx_descs(ctx);
- /* XXX change for per-queue sizes */
- device_printf(dev, "Using %d TX descriptors and %d RX descriptors\n",
- num_txd, num_rxd);
- if (scctx->isc_tx_nsegments > num_txd / MAX_SINGLE_PACKET_FRACTION)
- scctx->isc_tx_nsegments = max(1, num_txd /
- MAX_SINGLE_PACKET_FRACTION);
- if (scctx->isc_tx_tso_segments_max > num_txd /
- MAX_SINGLE_PACKET_FRACTION)
- scctx->isc_tx_tso_segments_max = max(1,
- num_txd / MAX_SINGLE_PACKET_FRACTION);
- /* TSO parameters - dig these out of the data sheet - simply correspond to tag setup */
- if (if_getcapabilities(ifp) & IFCAP_TSO) {
- /*
- * The stack can't handle a TSO size larger than IP_MAXPACKET,
- * but some MACs do.
- */
- if_sethwtsomax(ifp, min(scctx->isc_tx_tso_size_max,
- IP_MAXPACKET));
- /*
- * Take maximum number of m_pullup(9)'s in iflib_parse_header()
- * into account. In the worst case, each of these calls will
- * add another mbuf and, thus, the requirement for another DMA
- * segment. So for best performance, it doesn't make sense to
- * advertize a maximum of TSO segments that typically will
- * require defragmentation in iflib_encap().
- */
- if_sethwtsomaxsegcount(ifp, scctx->isc_tx_tso_segments_max - 3);
- if_sethwtsomaxsegsize(ifp, 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,
- NULL, NULL, "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);
- ctx->ifc_cpus_are_physical_cores = false;
- } else
- ctx->ifc_cpus_are_physical_cores = true;
- MPASS(CPU_COUNT(&ctx->ifc_cpus) > 0);
- /*
- ** Now set up MSI or MSI-X, should return us the number of supported
- ** vectors (will be 1 for a legacy interrupt and 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_intr_free;
- }
- if ((err = iflib_qset_structures_setup(ctx)))
- goto fail_queues;
- /*
- * Now that we know how many queues there are, get the core offset.
- */
- ctx->ifc_sysctl_core_offset = get_ctx_core_offset(ctx);
- if (msix > 1) {
- /*
- * When using MSI-X, ensure that ifdi_{r,t}x_queue_intr_enable
- * aren't the default NULL implementation.
- */
- kobj_desc = &ifdi_rx_queue_intr_enable_desc;
- kobj_method = kobj_lookup_method(((kobj_t)ctx)->ops->cls, NULL,
- kobj_desc);
- if (kobj_method == &kobj_desc->deflt) {
- device_printf(dev,
- "MSI-X requires ifdi_rx_queue_intr_enable method");
- err = EOPNOTSUPP;
- goto fail_queues;
- }
- kobj_desc = &ifdi_tx_queue_intr_enable_desc;
- kobj_method = kobj_lookup_method(((kobj_t)ctx)->ops->cls, NULL,
- kobj_desc);
- if (kobj_method == &kobj_desc->deflt) {
- device_printf(dev,
- "MSI-X requires ifdi_tx_queue_intr_enable method");
- err = EOPNOTSUPP;
- goto fail_queues;
- }
- /*
- * Assign the MSI-X vectors.
- * Note that the default NULL ifdi_msix_intr_assign method will
- * fail here, too.
- */
- err = IFDI_MSIX_INTR_ASSIGN(ctx, msix);
- if (err != 0) {
- device_printf(dev, "IFDI_MSIX_INTR_ASSIGN failed %d\n",
- err);
- goto fail_queues;
- }
- } else if (scctx->isc_intr != IFLIB_INTR_MSIX) {
- 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_queues;
- }
- } else {
- device_printf(dev,
- "Cannot use iflib with only 1 MSI-X interrupt!\n");
- err = ENODEV;
- goto fail_queues;
- }
- /*
- * It prevents a double-locking panic with iflib_media_status when
- * the driver loads.
- */
- CTX_UNLOCK(ctx);
- ether_ifattach(ctx->ifc_ifp, ctx->ifc_mac.octet);
- CTX_LOCK(ctx);
- if ((err = IFDI_ATTACH_POST(ctx)) != 0) {
- device_printf(dev, "IFDI_ATTACH_POST failed %d\n", err);
- goto fail_detach;
- }
- /*
- * Tell the upper layer(s) if IFCAP_VLAN_MTU is supported.
- * This must appear after the call to ether_ifattach() because
- * ether_ifattach() sets if_hdrlen to the default value.
- */
- if (if_getcapabilities(ifp) & IFCAP_VLAN_MTU)
- if_setifheaderlen(ifp, sizeof(struct ether_vlan_header));
- if ((err = iflib_netmap_attach(ctx))) {
- device_printf(ctx->ifc_dev, "netmap attach failed: %d\n", err);
- goto fail_detach;
- }
- *ctxp = ctx;
- DEBUGNET_SET(ctx->ifc_ifp, iflib);
- if_setgetcounterfn(ctx->ifc_ifp, iflib_if_get_counter);
- iflib_add_device_sysctl_post(ctx);
- iflib_add_pfil(ctx);
- ctx->ifc_flags |= IFC_INIT_DONE;
- CTX_UNLOCK(ctx);
- IFNET_WUNLOCK();
- return (0);
- fail_detach:
- ether_ifdetach(ctx->ifc_ifp);
- fail_queues:
- iflib_tqg_detach(ctx);
- iflib_tx_structures_free(ctx);
- iflib_rx_structures_free(ctx);
- IFDI_DETACH(ctx);
- IFDI_QUEUES_FREE(ctx);
- fail_intr_free:
- iflib_free_intr_mem(ctx);
- fail_unlock:
- CTX_UNLOCK(ctx);
- IFNET_WUNLOCK();
- iflib_deregister(ctx);
- fail_ctx_free:
- device_set_softc(ctx->ifc_dev, NULL);
- if (ctx->ifc_flags & IFC_SC_ALLOCATED)
- free(ctx->ifc_softc, M_IFLIB);
- free(ctx, M_IFLIB);
- 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;
- device_t dev = ctx->ifc_dev;
- /* Make sure VLANS are not using driver */
- if (if_vlantrunkinuse(ifp)) {
- device_printf(dev, "Vlan in use, detach first\n");
- return (EBUSY);
- }
- #ifdef PCI_IOV
- if (!CTX_IS_VF(ctx) && pci_iov_detach(dev) != 0) {
- device_printf(dev, "SR-IOV in use; detach first.\n");
- return (EBUSY);
- }
- #endif
- STATE_LOCK(ctx);
- ctx->ifc_flags |= IFC_IN_DETACH;
- STATE_UNLOCK(ctx);
- /* Unregister VLAN handlers before calling iflib_stop() */
- iflib_unregister_vlan_handlers(ctx);
- iflib_netmap_detach(ifp);
- ether_ifdetach(ifp);
- CTX_LOCK(ctx);
- iflib_stop(ctx);
- CTX_UNLOCK(ctx);
- iflib_rem_pfil(ctx);
- if (ctx->ifc_led_dev != NULL)
- led_destroy(ctx->ifc_led_dev);
- iflib_tqg_detach(ctx);
- iflib_tx_structures_free(ctx);
- iflib_rx_structures_free(ctx);
- CTX_LOCK(ctx);
- IFDI_DETACH(ctx);
- IFDI_QUEUES_FREE(ctx);
- CTX_UNLOCK(ctx);
- /* ether_ifdetach calls if_qflush - lock must be destroy afterwards*/
- iflib_free_intr_mem(ctx);
- bus_generic_detach(dev);
- iflib_deregister(ctx);
- device_set_softc(ctx->ifc_dev, NULL);
- if (ctx->ifc_flags & IFC_SC_ALLOCATED)
- free(ctx->ifc_softc, M_IFLIB);
- unref_ctx_core_offset(ctx);
- free(ctx, M_IFLIB);
- return (0);
- }
- static void
- iflib_tqg_detach(if_ctx_t ctx)
- {
- iflib_txq_t txq;
- iflib_rxq_t rxq;
- int i;
- struct taskqgroup *tqg;
- /* 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);
- #ifdef DEV_NETMAP
- callout_drain(&txq->ift_netmap_timer);
- #endif /* DEV_NETMAP */
- 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);
- }
- 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);
- }
- static void
- iflib_free_intr_mem(if_ctx_t ctx)
- {
- if (ctx->ifc_softc_ctx.isc_intr != IFLIB_INTR_MSIX) {
- iflib_irq_free(ctx, &ctx->ifc_legacy_irq);
- }
- if (ctx->ifc_softc_ctx.isc_intr != IFLIB_INTR_LEGACY) {
- pci_release_msi(ctx->ifc_dev);
- }
- if (ctx->ifc_msix_mem != NULL) {
- bus_release_resource(ctx->ifc_dev, SYS_RES_MEMORY,
- rman_get_rid(ctx->ifc_msix_mem), ctx->ifc_msix_mem);
- ctx->ifc_msix_mem = NULL;
- }
- }
- 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_if_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)
- {
- iflib_timer_default = hz / 2;
- 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)
- {
- int i;
- 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_nrxqs >= 1 && sctx->isc_nrxqs <= 8);
- for (i = 0; i < sctx->isc_nrxqs; i++) {
- MPASS(sctx->isc_nrxd_min[i]);
- MPASS(powerof2(sctx->isc_nrxd_min[i]));
- MPASS(sctx->isc_nrxd_max[i]);
- MPASS(powerof2(sctx->isc_nrxd_max[i]));
- MPASS(sctx->isc_nrxd_default[i]);
- MPASS(powerof2(sctx->isc_nrxd_default[i]));
- }
- MPASS(sctx->isc_ntxqs >= 1 && sctx->isc_ntxqs <= 8);
- for (i = 0; i < sctx->isc_ntxqs; i++) {
- MPASS(sctx->isc_ntxd_min[i]);
- MPASS(powerof2(sctx->isc_ntxd_min[i]));
- MPASS(sctx->isc_ntxd_max[i]);
- MPASS(powerof2(sctx->isc_ntxd_max[i]));
- MPASS(sctx->isc_ntxd_default[i]);
- MPASS(powerof2(sctx->isc_ntxd_default[i]));
- }
- }
- 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);
- STATE_LOCK_INIT(ctx, device_get_nameunit(ctx->ifc_dev));
- ifp = ctx->ifc_ifp = if_alloc(IFT_ETHER);
- /*
- * Initialize our context's device specific methods
- */
- kobj_init((kobj_t) ctx, (kobj_class_t) driver);
- kobj_class_compile((kobj_class_t) driver);
- 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);
- #ifdef ALTQ
- if_setstartfn(ifp, iflib_altq_if_start);
- if_settransmitfn(ifp, iflib_altq_if_transmit);
- if_setsendqready(ifp);
- #else
- if_settransmitfn(ifp, iflib_if_transmit);
- #endif
- 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);
- if ((sctx->isc_flags & IFLIB_DRIVER_MEDIA) == 0) {
- ctx->ifc_mediap = &ctx->ifc_media;
- ifmedia_init(ctx->ifc_mediap, IFM_IMASK,
- iflib_media_change, iflib_media_status);
- }
- return (0);
- }
- static void
- iflib_unregister_vlan_handlers(if_ctx_t ctx)
- {
- /* Unregister VLAN events */
- if (ctx->ifc_vlan_attach_event != NULL) {
- EVENTHANDLER_DEREGISTER(vlan_config, ctx->ifc_vlan_attach_event);
- ctx->ifc_vlan_attach_event = NULL;
- }
- if (ctx->ifc_vlan_detach_event != NULL) {
- EVENTHANDLER_DEREGISTER(vlan_unconfig, ctx->ifc_vlan_detach_event);
- ctx->ifc_vlan_detach_event = NULL;
- }
- }
- static void
- iflib_deregister(if_ctx_t ctx)
- {
- if_t ifp = ctx->ifc_ifp;
- /* Remove all media */
- ifmedia_removeall(&ctx->ifc_media);
- /* Ensure that VLAN event handlers are unregistered */
- iflib_unregister_vlan_handlers(ctx);
- /* Release kobject reference */
- kobj_delete((kobj_t) ctx, NULL);
- /* Free the ifnet structure */
- if_free(ifp);
- STATE_LOCK_DESTROY(ctx);
- /* ether_ifdetach calls if_qflush - lock must be destroy afterwards*/
- CTX_LOCK_DESTROY(ctx);
- }
- 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;
- int fl_offset = (sctx->isc_flags & IFLIB_HAS_RXCQ ? 1 : 0);
- caddr_t *vaddrs;
- uint64_t *paddrs;
- 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"));
- KASSERT(nrxqs >= fl_offset + nfree_lists,
- ("there must be at least a rxq for each free list"));
- /* Allocate the TX ring struct memory */
- if (!(ctx->ifc_txqs =
- (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 (!(ctx->ifc_rxqs =
- (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;
- }
- txq = ctx->ifc_txqs;
- rxq = ctx->ifc_rxqs;
- /*
- * 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_NOWAIT | M_ZERO)) == NULL) {
- device_printf(dev,
- "Unable to allocate TX DMA info memory\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, 0)) {
- device_printf(dev,
- "Unable to allocate TX descriptors\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;
- }
- 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);
- txq->ift_timer.c_cpu = cpu;
- #ifdef DEV_NETMAP
- callout_init_mtx(&txq->ift_netmap_timer, &txq->ift_mtx, 0);
- txq->ift_netmap_timer.c_cpu = cpu;
- #endif /* DEV_NETMAP */
- 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 */
- callout_init(&rxq->ifr_watchdog, 1);
- if ((ifdip = malloc(sizeof(struct iflib_dma_info) * nrxqs,
- M_IFLIB, M_NOWAIT | M_ZERO)) == NULL) {
- device_printf(dev,
- "Unable to allocate RX DMA info memory\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, 0)) {
- device_printf(dev,
- "Unable to allocate RX descriptors\n");
- err = ENOMEM;
- goto err_tx_desc;
- }
- bzero((void *)ifdip->idi_vaddr, rxqsizes[j]);
- }
- rxq->ifr_ctx = ctx;
- rxq->ifr_id = i;
- rxq->ifr_fl_offset = fl_offset;
- 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);
- }
- /* 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,
- "Unable to allocate device TX queue\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,
- "Unable to allocate device RX queue\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:
- rx_fail:
- 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;
- 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;
- if_shared_ctx_t sctx = ctx->ifc_sctx;
- int i, j;
- for (i = 0; i < NTXQSETS(ctx); i++, txq++) {
- for (j = 0; j < sctx->isc_ntxqs; j++)
- iflib_dma_free(&txq->ift_ifdi[j]);
- iflib_txq_destroy(txq);
- }
- free(ctx->ifc_txqs, M_IFLIB);
- ctx->ifc_txqs = NULL;
- }
- /*********************************************************************
- *
- * 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 err, i;
- #endif
- for (q = 0; q < ctx->ifc_softc_ctx.isc_nrxqsets; q++, rxq++) {
- #if defined(INET6) || defined(INET)
- 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]));
- if (err != 0) {
- device_printf(ctx->ifc_dev,
- "LRO Initialization failed!\n");
- goto fail;
- }
- #endif
- IFDI_RXQ_SETUP(ctx, rxq->ifr_id);
- }
- return (0);
- #if defined(INET6) || defined(INET)
- fail:
- /*
- * Free LRO resources 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++) {
- tcp_lro_free(&rxq->ifr_lc);
- }
- return (err);
- #endif
- }
- /*********************************************************************
- *
- * Free all receive rings.
- *
- **********************************************************************/
- static void
- iflib_rx_structures_free(if_ctx_t ctx)
- {
- iflib_rxq_t rxq = ctx->ifc_rxqs;
- if_shared_ctx_t sctx = ctx->ifc_sctx;
- int i, j;
- for (i = 0; i < ctx->ifc_softc_ctx.isc_nrxqsets; i++, rxq++) {
- for (j = 0; j < sctx->isc_nrxqs; j++)
- iflib_dma_free(&rxq->ifr_ifdi[j]);
- iflib_rx_sds_free(rxq);
- #if defined(INET6) || defined(INET)
- tcp_lro_free(&rxq->ifr_lc);
- #endif
- }
- free(ctx->ifc_rxqs, M_IFLIB);
- ctx->ifc_rxqs = NULL;
- }
- static int
- iflib_qset_structures_setup(if_ctx_t ctx)
- {
- int err;
- /*
- * It is expected that the caller takes care of freeing queues if this
- * fails.
- */
- if ((err = iflib_tx_structures_setup(ctx)) != 0) {
- device_printf(ctx->ifc_dev, "iflib_tx_structures_setup failed: %d\n", err);
- return (err);
- }
- if ((err = iflib_rx_structures_setup(ctx)) != 0)
- device_printf(ctx->ifc_dev, "iflib_rx_structures_setup failed: %d\n", err);
- 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, const char *name)
- {
- return (_iflib_irq_alloc(ctx, irq, rid, filter, handler, arg, name));
- }
- /* Just to avoid copy/paste */
- static inline int
- iflib_irq_set_affinity(if_ctx_t ctx, if_irq_t irq, iflib_intr_type_t type,
- int qid, struct grouptask *gtask, struct taskqgroup *tqg, void *uniq,
- const char *name)
- {
- device_t dev;
- unsigned int base_cpuid, cpuid;
- int err;
- dev = ctx->ifc_dev;
- base_cpuid = ctx->ifc_sysctl_core_offset;
- cpuid = get_cpuid_for_queue(ctx, base_cpuid, qid, type == IFLIB_INTR_TX);
- err = taskqgroup_attach_cpu(tqg, gtask, uniq, cpuid, dev,
- irq ? irq->ii_res : NULL, name);
- if (err) {
- device_printf(dev, "taskqgroup_attach_cpu failed %d\n", err);
- return (err);
- }
- #ifdef notyet
- if (cpuid > ctx->ifc_cpuid_highest)
- ctx->ifc_cpuid_highest = cpuid;
- #endif
- return (0);
- }
- /*
- * Allocate a hardware interrupt for subctx using the parent (ctx)'s hardware
- * resources.
- *
- * Similar to iflib_irq_alloc_generic(), but for interrupt type IFLIB_INTR_RXTX
- * only.
- *
- * XXX: Could be removed if subctx's dev has its intr resource allocation
- * methods replaced with custom ones?
- */
- int
- iflib_irq_alloc_generic_subctx(if_ctx_t ctx, if_ctx_t subctx, if_irq_t irq,
- int rid, iflib_intr_type_t type,
- driver_filter_t *filter, void *filter_arg,
- int qid, const char *name)
- {
- device_t dev, subdev;
- 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;
- MPASS(ctx != NULL);
- MPASS(subctx != NULL);
- tqrid = rid;
- dev = ctx->ifc_dev;
- subdev = subctx->ifc_dev;
- switch (type) {
- case IFLIB_INTR_RXTX:
- q = &subctx->ifc_rxqs[qid];
- info = &subctx->ifc_rxqs[qid].ifr_filter_info;
- gtask = &subctx->ifc_rxqs[qid].ifr_task;
- tqg = qgroup_if_io_tqg;
- fn = _task_fn_rx;
- intr_fast = iflib_fast_intr_rxtx;
- NET_GROUPTASK_INIT(gtask, 0, fn, q);
- break;
- default:
- device_printf(dev, "%s: unknown net intr type for subctx %s (%d)\n",
- __func__, device_get_nameunit(subdev), type);
- return (EINVAL);
- }
- info->ifi_filter = filter;
- info->ifi_filter_arg = filter_arg;
- info->ifi_task = gtask;
- info->ifi_ctx = q;
- NET_GROUPTASK_INIT(gtask, 0, fn, q);
- /* Allocate interrupts from hardware using parent context */
- err = _iflib_irq_alloc(ctx, irq, rid, intr_fast, NULL, info, name);
- if (err != 0) {
- device_printf(dev, "_iflib_irq_alloc failed for subctx %s: %d\n",
- device_get_nameunit(subdev), err);
- return (err);
- }
- if (tqrid != -1) {
- err = iflib_irq_set_affinity(ctx, irq, type, qid, gtask, tqg, q,
- name);
- if (err)
- return (err);
- } else {
- taskqgroup_attach(tqg, gtask, q, dev, irq->ii_res, name);
- }
- 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, const char *name)
- {
- device_t dev;
- 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);
- ctx->ifc_flags |= IFC_NETMAP_TX_IRQ;
- 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;
- NET_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;
- NET_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:
- device_printf(ctx->ifc_dev, "%s: unknown net intr type\n",
- __func__);
- return (EINVAL);
- }
- info->ifi_filter = filter;
- info->ifi_filter_arg = filter_arg;
- info->ifi_task = gtask;
- info->ifi_ctx = q;
- dev = ctx->ifc_dev;
- err = _iflib_irq_alloc(ctx, irq, rid, intr_fast, NULL, info, name);
- if (err != 0) {
- device_printf(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, irq, type, qid, gtask, tqg, q,
- name);
- if (err)
- return (err);
- } else {
- taskqgroup_attach(tqg, gtask, q, dev, 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, const char *name)
- {
- device_t dev;
- struct grouptask *gtask;
- struct taskqgroup *tqg;
- gtask_fn_t *fn;
- void *q;
- 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;
- GROUPTASK_INIT(gtask, 0, fn, q);
- 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;
- NET_GROUPTASK_INIT(gtask, 0, fn, q);
- break;
- case IFLIB_INTR_IOV:
- q = ctx;
- gtask = &ctx->ifc_vflr_task;
- tqg = qgroup_if_config_tqg;
- fn = _task_fn_iov;
- GROUPTASK_INIT(gtask, 0, fn, q);
- break;
- default:
- panic("unknown net intr type");
- }
- err = iflib_irq_set_affinity(ctx, irq, type, qid, gtask, tqg, q, name);
- if (err) {
- dev = ctx->ifc_dev;
- taskqgroup_attach(tqg, gtask, q, dev, irq ? irq->ii_res : NULL,
- 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,
- rman_get_rid(irq->ii_res), irq->ii_res);
- }
- static int
- iflib_legacy_setup(if_ctx_t ctx, driver_filter_t filter, void *filter_arg, int *rid, const 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;
- device_t dev;
- struct grouptask *gtask;
- struct resource *res;
- struct taskqgroup *tqg;
- void *q;
- int err, tqrid;
- bool rx_only;
- q = &ctx->ifc_rxqs[0];
- info = &rxq[0].ifr_filter_info;
- gtask = &rxq[0].ifr_task;
- tqg = qgroup_if_io_tqg;
- tqrid = *rid;
- rx_only = (ctx->ifc_sctx->isc_flags & IFLIB_SINGLE_IRQ_RX_ONLY) != 0;
- ctx->ifc_flags |= IFC_LEGACY;
- info->ifi_filter = filter;
- info->ifi_filter_arg = filter_arg;
- info->ifi_task = gtask;
- info->ifi_ctx = rx_only ? ctx : q;
- dev = ctx->ifc_dev;
- /* We allocate a single interrupt resource */
- err = _iflib_irq_alloc(ctx, irq, tqrid, rx_only ? iflib_fast_intr_ctx :
- iflib_fast_intr_rxtx, NULL, info, name);
- if (err != 0)
- return (err);
- NET_GROUPTASK_INIT(gtask, 0, _task_fn_rx, q);
- res = irq->ii_res;
- taskqgroup_attach(tqg, gtask, q, dev, res, name);
- GROUPTASK_INIT(&txq->ift_task, 0, _task_fn_tx, txq);
- taskqgroup_attach(qgroup_if_io_tqg, &txq->ift_task, txq, dev, res,
- "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)
- {
- MPASS(ctx->ifc_admin_task.gt_taskqueue != NULL);
- 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, const char *name)
- {
- taskqgroup_attach_cpu(qgroup_if_io_tqg, gt, uniq, cpu, NULL, NULL,
- name);
- }
- void
- iflib_config_gtask_init(void *ctx, struct grouptask *gtask, gtask_fn_t *fn,
- const char *name)
- {
- GROUPTASK_INIT(gtask, 0, fn, ctx);
- taskqgroup_attach(qgroup_if_config_tqg, gtask, gtask, NULL, NULL,
- 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)) {
- STATE_LOCK(ctx);
- ctx->ifc_flags |= IFC_PREFETCH;
- STATE_UNLOCK(ctx);
- }
- /* 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
- bus_dmamap_sync(txq->ift_ifdi->idi_tag, txq->ift_ifdi->idi_map,
- BUS_DMASYNC_POSTREAD);
- 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)
- {
- iflib_fl_t fl;
- u_int i;
- for (i = 0, fl = &rxq->ifr_fl[0]; i < rxq->ifr_nfl; i++, fl++)
- bus_dmamap_sync(fl->ifl_ifdi->idi_tag, fl->ifl_ifdi->idi_map,
- BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE);
- 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 | CTLFLAG_MPSAFE,
- info, 0, iflib_sysctl_int_delay, "I", description);
- }
- struct sx *
- iflib_ctx_lock_get(if_ctx_t ctx)
- {
- return (&ctx->ifc_ctx_sx);
- }
- 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 admincnt, bar, err, iflib_num_rx_queues, iflib_num_tx_queues;
- int msgs, queuemsgs, queues, rx_queues, tx_queues, vectors;
- iflib_num_tx_queues = ctx->ifc_sysctl_ntxqs;
- iflib_num_rx_queues = ctx->ifc_sysctl_nrxqs;
- if (bootverbose)
- device_printf(dev, "msix_init qsets capped at %d\n",
- imax(scctx->isc_ntxqsets, scctx->isc_nrxqsets));
- /* Override by tuneable */
- if (scctx->isc_disable_msix)
- goto msi;
- /* First try MSI-X */
- if ((msgs = pci_msix_count(dev)) == 0) {
- if (bootverbose)
- device_printf(dev, "MSI-X not supported or disabled\n");
- goto msi;
- }
- bar = ctx->ifc_softc_ctx.isc_msix_bar;
- /*
- * 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 MSI-X 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) {
- device_printf(dev, "Unable to map MSI-X table\n");
- goto msi;
- }
- }
- admincnt = sctx->isc_admin_intrcnt;
- #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);
- if (bootverbose)
- device_printf(dev,
- "intr 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);
- }
- vectors = rx_queues + admincnt;
- if (msgs < vectors) {
- device_printf(dev,
- "insufficient number of MSI-X vectors "
- "(supported %d, need %d)\n", msgs, vectors);
- goto msi;
- }
- device_printf(dev, "Using %d RX queues %d TX queues\n", rx_queues,
- tx_queues);
- msgs = vectors;
- if ((err = pci_alloc_msix(dev, &vectors)) == 0) {
- if (vectors != msgs) {
- device_printf(dev,
- "Unable to allocate sufficient MSI-X vectors "
- "(got %d, need %d)\n", vectors, msgs);
- pci_release_msi(dev);
- if (bar != -1) {
- bus_release_resource(dev, SYS_RES_MEMORY, bar,
- ctx->ifc_msix_mem);
- ctx->ifc_msix_mem = NULL;
- }
- goto msi;
- }
- device_printf(dev, "Using MSI-X 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 MSI-X vectors, err: %d\n", vectors,
- err);
- if (bar != -1) {
- bus_release_resource(dev, SYS_RES_MEMORY, bar,
- ctx->ifc_msix_mem);
- ctx->ifc_msix_mem = NULL;
- }
- }
- 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 {
- scctx->isc_vectors = 1;
- device_printf(dev,"Using a Legacy interrupt\n");
- scctx->isc_intr = IFLIB_INTR_LEGACY;
- }
- return (vectors);
- }
- static const 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;
- const 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;
- 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;
- default:
- printf("%s: unhandled type\n", __func__);
- return (EINVAL);
- }
- 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 | CTLFLAG_MPSAFE, NULL,
- "IFLIB fields");
- oid_list = SYSCTL_CHILDREN(node);
- SYSCTL_ADD_CONST_STRING(ctx_list, oid_list, OID_AUTO, "driver_version",
- CTLFLAG_RD, ctx->ifc_sctx->isc_driver_version, "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 MSI-X (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");
- SYSCTL_ADD_U16(ctx_list, oid_list, OID_AUTO, "tx_abdicate",
- CTLFLAG_RWTUN, &ctx->ifc_sysctl_tx_abdicate, 0,
- "cause TX to abdicate instead of running to completion");
- ctx->ifc_sysctl_core_offset = CORE_OFFSET_UNSPECIFIED;
- SYSCTL_ADD_U16(ctx_list, oid_list, OID_AUTO, "core_offset",
- CTLFLAG_RDTUN, &ctx->ifc_sysctl_core_offset, 0,
- "offset to start using cores at");
- SYSCTL_ADD_U8(ctx_list, oid_list, OID_AUTO, "separate_txrx",
- CTLFLAG_RDTUN, &ctx->ifc_sysctl_separate_txrx, 0,
- "use separate cores for TX and RX");
- SYSCTL_ADD_U8(ctx_list, oid_list, OID_AUTO, "use_logical_cores",
- CTLFLAG_RDTUN, &ctx->ifc_sysctl_use_logical_cores, 0,
- "try to make use of logical cores for TX and RX");
- SYSCTL_ADD_U16(ctx_list, oid_list, OID_AUTO, "use_extra_msix_vectors",
- CTLFLAG_RDTUN, &ctx->ifc_sysctl_extra_msix_vectors, 0,
- "attempt to reserve the given number of extra MSI-X vectors during driver load for the creation of additional interfaces later");
- SYSCTL_ADD_INT(ctx_list, oid_list, OID_AUTO, "allocated_msix_vectors",
- CTLFLAG_RDTUN, &ctx->ifc_softc_ctx.isc_vectors, 0,
- "total # of MSI-X vectors allocated by driver");
- /* XXX change for per-queue sizes */
- SYSCTL_ADD_PROC(ctx_list, oid_list, OID_AUTO, "override_ntxds",
- CTLTYPE_STRING | CTLFLAG_RWTUN | CTLFLAG_NEEDGIANT, 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 | CTLFLAG_NEEDGIANT, 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 | CTLFLAG_MPSAFE, NULL, "Queue Name");
- queue_list = SYSCTL_CHILDREN(queue_node);
- SYSCTL_ADD_INT(ctx_list, queue_list, OID_AUTO, "cpu",
- CTLFLAG_RD, &txq->ift_task.gt_cpu, 0,
- "cpu this queue is bound to");
- #if MEMORY_LOGGING
- SYSCTL_ADD_UQUAD(ctx_list, queue_list, OID_AUTO, "txq_dequeued",
- CTLFLAG_RD, &txq->ift_dequeued, "total mbufs freed");
- SYSCTL_ADD_UQUAD(ctx_list, queue_list, OID_AUTO, "txq_enqueued",
- CTLFLAG_RD, &txq->ift_enqueued, "total mbufs enqueued");
- #endif
- SYSCTL_ADD_UQUAD(ctx_list, queue_list, OID_AUTO, "mbuf_defrag",
- CTLFLAG_RD, &txq->ift_mbuf_defrag,
- "# of times m_defrag was called");
- SYSCTL_ADD_UQUAD(ctx_list, queue_list, OID_AUTO, "m_pullups",
- CTLFLAG_RD, &txq->ift_pullups,
- "# of times m_pullup was called");
- SYSCTL_ADD_UQUAD(ctx_list, queue_list, OID_AUTO,
- "mbuf_defrag_failed", CTLFLAG_RD,
- &txq->ift_mbuf_defrag_failed, "# of times m_defrag failed");
- SYSCTL_ADD_UQUAD(ctx_list, queue_list, OID_AUTO,
- "no_desc_avail", CTLFLAG_RD, &txq->ift_no_desc_avail,
- "# of times no descriptors were available");
- SYSCTL_ADD_UQUAD(ctx_list, queue_list, OID_AUTO,
- "tx_map_failed", CTLFLAG_RD, &txq->ift_map_failed,
- "# of times DMA map failed");
- SYSCTL_ADD_UQUAD(ctx_list, queue_list, OID_AUTO,
- "txd_encap_efbig", CTLFLAG_RD, &txq->ift_txd_encap_efbig,
- "# of times txd_encap returned EFBIG");
- SYSCTL_ADD_UQUAD(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_UQUAD(ctx_list, queue_list, OID_AUTO,
- "txq_processed", CTLFLAG_RD, &txq->ift_processed,
- "descriptors procesed for clean");
- SYSCTL_ADD_UQUAD(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 | CTLFLAG_NEEDGIANT,
- __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 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 | CTLFLAG_MPSAFE, NULL, "Queue Name");
- queue_list = SYSCTL_CHILDREN(queue_node);
- SYSCTL_ADD_INT(ctx_list, queue_list, OID_AUTO, "cpu",
- CTLFLAG_RD, &rxq->ifr_task.gt_cpu, 0,
- "cpu this queue is bound to");
- if (sctx->isc_flags & IFLIB_HAS_RXCQ) {
- 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 | CTLFLAG_MPSAFE,
- 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");
- SYSCTL_ADD_U16(ctx_list, fl_list, OID_AUTO, "buf_size",
- CTLFLAG_RD, &fl->ifl_buf_size, 1, "buffer size");
- #if MEMORY_LOGGING
- SYSCTL_ADD_UQUAD(ctx_list, fl_list, OID_AUTO,
- "fl_m_enqueued", CTLFLAG_RD, &fl->ifl_m_enqueued,
- "mbufs allocated");
- SYSCTL_ADD_UQUAD(ctx_list, fl_list, OID_AUTO,
- "fl_m_dequeued", CTLFLAG_RD, &fl->ifl_m_dequeued,
- "mbufs freed");
- SYSCTL_ADD_UQUAD(ctx_list, fl_list, OID_AUTO,
- "fl_cl_enqueued", CTLFLAG_RD, &fl->ifl_cl_enqueued,
- "clusters allocated");
- SYSCTL_ADD_UQUAD(ctx_list, fl_list, OID_AUTO,
- "fl_cl_dequeued", CTLFLAG_RD, &fl->ifl_cl_dequeued,
- "clusters freed");
- #endif
- }
- }
- }
- void
- iflib_request_reset(if_ctx_t ctx)
- {
- STATE_LOCK(ctx);
- ctx->ifc_flags |= IFC_DO_RESET;
- STATE_UNLOCK(ctx);
- }
- #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
- #ifdef DEBUGNET
- static void
- iflib_debugnet_init(if_t ifp, int *nrxr, int *ncl, int *clsize)
- {
- if_ctx_t ctx;
- ctx = if_getsoftc(ifp);
- CTX_LOCK(ctx);
- *nrxr = NRXQSETS(ctx);
- *ncl = ctx->ifc_rxqs[0].ifr_fl->ifl_size;
- *clsize = ctx->ifc_rxqs[0].ifr_fl->ifl_buf_size;
- CTX_UNLOCK(ctx);
- }
- static void
- iflib_debugnet_event(if_t ifp, enum debugnet_ev event)
- {
- if_ctx_t ctx;
- if_softc_ctx_t scctx;
- iflib_fl_t fl;
- iflib_rxq_t rxq;
- int i, j;
- ctx = if_getsoftc(ifp);
- scctx = &ctx->ifc_softc_ctx;
- switch (event) {
- case DEBUGNET_START:
- for (i = 0; i < scctx->isc_nrxqsets; i++) {
- rxq = &ctx->ifc_rxqs[i];
- for (j = 0; j < rxq->ifr_nfl; j++) {
- fl = rxq->ifr_fl;
- fl->ifl_zone = m_getzone(fl->ifl_buf_size);
- }
- }
- iflib_no_tx_batch = 1;
- break;
- default:
- break;
- }
- }
- static int
- iflib_debugnet_transmit(if_t ifp, struct mbuf *m)
- {
- if_ctx_t ctx;
- iflib_txq_t txq;
- int error;
- ctx = if_getsoftc(ifp);
- if ((if_getdrvflags(ifp) & (IFF_DRV_RUNNING | IFF_DRV_OACTIVE)) !=
- IFF_DRV_RUNNING)
- return (EBUSY);
- txq = &ctx->ifc_txqs[0];
- error = iflib_encap(txq, &m);
- if (error == 0)
- (void)iflib_txd_db_check(txq, true);
- return (error);
- }
- static int
- iflib_debugnet_poll(if_t ifp, int count)
- {
- struct epoch_tracker et;
- if_ctx_t ctx;
- if_softc_ctx_t scctx;
- iflib_txq_t txq;
- int i;
- ctx = if_getsoftc(ifp);
- scctx = &ctx->ifc_softc_ctx;
- if ((if_getdrvflags(ifp) & (IFF_DRV_RUNNING | IFF_DRV_OACTIVE)) !=
- IFF_DRV_RUNNING)
- return (EBUSY);
- txq = &ctx->ifc_txqs[0];
- (void)iflib_completed_tx_reclaim(txq, RECLAIM_THRESH(ctx));
- NET_EPOCH_ENTER(et);
- for (i = 0; i < scctx->isc_nrxqsets; i++)
- (void)iflib_rxeof(&ctx->ifc_rxqs[i], 16 /* XXX */);
- NET_EPOCH_EXIT(et);
- return (0);
- }
- #endif /* DEBUGNET */
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