Index: sys/amd64/conf/GENERIC
===================================================================
--- sys/amd64/conf/GENERIC
+++ sys/amd64/conf/GENERIC
@@ -102,6 +102,7 @@
options ACPI_DMAR
device pci
options PCI_IOV # PCI SR-IOV support
+options IFLIB
# Floppy drives
device fdc
Index: sys/conf/files
===================================================================
--- sys/conf/files
+++ sys/conf/files
@@ -1861,37 +1861,39 @@
dev/ixgb/if_ixgb.c optional ixgb
dev/ixgb/ixgb_ee.c optional ixgb
dev/ixgb/ixgb_hw.c optional ixgb
-dev/ixgbe/if_ix.c optional ix inet \
+dev/ixgbe/if_ix.c optional ix inet iflib \
compile-with "${NORMAL_C} -I$S/dev/ixgbe -DSMP"
dev/ixgbe/if_ixv.c optional ixv inet \
compile-with "${NORMAL_C} -I$S/dev/ixgbe -DSMP"
-dev/ixgbe/ix_txrx.c optional ix inet | ixv inet \
+dev/ixgbe/ix_txrx.c optional ix inet iflib | ixv inet iflib \
compile-with "${NORMAL_C} -I$S/dev/ixgbe"
-dev/ixgbe/ixgbe_osdep.c optional ix inet | ixv inet \
+dev/ixgbe/ixgbe_osdep.c optional ix inet iflib | ixv inet iflib \
compile-with "${NORMAL_C} -I$S/dev/ixgbe"
-dev/ixgbe/ixgbe_phy.c optional ix inet | ixv inet \
+dev/ixgbe/ixgbe_sysctl.c optional ix inet iflib | ixv inet iflib \
compile-with "${NORMAL_C} -I$S/dev/ixgbe"
-dev/ixgbe/ixgbe_api.c optional ix inet | ixv inet \
+dev/ixgbe/ixgbe_phy.c optional ix inet iflib | ixv inet iflib \
compile-with "${NORMAL_C} -I$S/dev/ixgbe"
-dev/ixgbe/ixgbe_common.c optional ix inet | ixv inet \
+dev/ixgbe/ixgbe_api.c optional ix inet iflib | ixv inet iflib \
compile-with "${NORMAL_C} -I$S/dev/ixgbe"
-dev/ixgbe/ixgbe_mbx.c optional ix inet | ixv inet \
+dev/ixgbe/ixgbe_common.c optional ix inet iflib | ixv inet iflib \
compile-with "${NORMAL_C} -I$S/dev/ixgbe"
-dev/ixgbe/ixgbe_vf.c optional ix inet | ixv inet \
+dev/ixgbe/ixgbe_mbx.c optional ix inet iflib | ixv inet iflib \
compile-with "${NORMAL_C} -I$S/dev/ixgbe"
-dev/ixgbe/ixgbe_82598.c optional ix inet | ixv inet \
+dev/ixgbe/ixgbe_vf.c optional ix inet iflib | ixv inet iflib \
compile-with "${NORMAL_C} -I$S/dev/ixgbe"
-dev/ixgbe/ixgbe_82599.c optional ix inet | ixv inet \
+dev/ixgbe/ixgbe_82598.c optional ix inet iflib | ixv inet iflib \
compile-with "${NORMAL_C} -I$S/dev/ixgbe"
-dev/ixgbe/ixgbe_x540.c optional ix inet | ixv inet \
+dev/ixgbe/ixgbe_82599.c optional ix inet iflib | ixv inet iflib \
compile-with "${NORMAL_C} -I$S/dev/ixgbe"
-dev/ixgbe/ixgbe_x550.c optional ix inet | ixv inet \
+dev/ixgbe/ixgbe_x540.c optional ix inet iflib | ixv inet iflib \
compile-with "${NORMAL_C} -I$S/dev/ixgbe"
-dev/ixgbe/ixgbe_dcb.c optional ix inet | ixv inet \
+dev/ixgbe/ixgbe_x550.c optional ix inet iflib | ixv inet iflib \
compile-with "${NORMAL_C} -I$S/dev/ixgbe"
-dev/ixgbe/ixgbe_dcb_82598.c optional ix inet | ixv inet \
+dev/ixgbe/ixgbe_dcb.c optional ix inet iflib | ixv inet iflib \
compile-with "${NORMAL_C} -I$S/dev/ixgbe"
-dev/ixgbe/ixgbe_dcb_82599.c optional ix inet | ixv inet \
+dev/ixgbe/ixgbe_dcb_82598.c optional ix inet iflib | ixv inet iflib \
+ compile-with "${NORMAL_C} -I$S/dev/ixgbe"
+dev/ixgbe/ixgbe_dcb_82599.c optional ix inet iflib | ixv inet iflib \
compile-with "${NORMAL_C} -I$S/dev/ixgbe"
dev/jme/if_jme.c optional jme pci
dev/joy/joy.c optional joy
@@ -3507,6 +3509,9 @@
net/if_tap.c optional tap
net/if_vlan.c optional vlan
net/if_vxlan.c optional vxlan inet | vxlan inet6
+net/ifdi_if.m optional ether pci
+net/iflib.c optional ether pci
+net/mp_ring.c optional ether
net/mppcc.c optional netgraph_mppc_compression
net/mppcd.c optional netgraph_mppc_compression
net/netisr.c standard
Index: sys/conf/files.amd64
===================================================================
--- sys/conf/files.amd64
+++ sys/conf/files.amd64
@@ -216,25 +216,27 @@
dev/ipmi/ipmi_ssif.c optional ipmi smbus
dev/ipmi/ipmi_pci.c optional ipmi pci
dev/ipmi/ipmi_linux.c optional ipmi compat_linux32
-dev/ixl/if_ixl.c optional ixl pci \
+dev/ixl/if_ixl.c optional ixl iflib \
compile-with "${NORMAL_C} -I$S/dev/ixl"
-dev/ixl/if_ixlv.c optional ixlv pci \
+dev/ixl/if_ixlv.c optional ixlv iflib \
compile-with "${NORMAL_C} -I$S/dev/ixl"
-dev/ixl/ixlvc.c optional ixlv pci \
+dev/ixl/ixlvc.c optional ixlv iflib \
compile-with "${NORMAL_C} -I$S/dev/ixl"
-dev/ixl/ixl_txrx.c optional ixl pci | ixlv pci \
+dev/ixl/if_ixl_common.c optional ixl iflib | ixlv iflib \
compile-with "${NORMAL_C} -I$S/dev/ixl"
-dev/ixl/i40e_osdep.c optional ixl pci | ixlv pci \
+dev/ixl/ixl_txrx.c optional ixl iflib | ixlv iflib \
compile-with "${NORMAL_C} -I$S/dev/ixl"
-dev/ixl/i40e_lan_hmc.c optional ixl pci | ixlv pci \
+dev/ixl/i40e_osdep.c optional ixl iflib | ixlv iflib \
compile-with "${NORMAL_C} -I$S/dev/ixl"
-dev/ixl/i40e_hmc.c optional ixl pci | ixlv pci \
+dev/ixl/i40e_lan_hmc.c optional ixl iflib | ixlv iflib \
compile-with "${NORMAL_C} -I$S/dev/ixl"
-dev/ixl/i40e_common.c optional ixl pci | ixlv pci \
+dev/ixl/i40e_hmc.c optional ixl iflib | ixlv iflib \
compile-with "${NORMAL_C} -I$S/dev/ixl"
-dev/ixl/i40e_nvm.c optional ixl pci | ixlv pci \
+dev/ixl/i40e_common.c optional ixl iflib | ixlv iflib \
compile-with "${NORMAL_C} -I$S/dev/ixl"
-dev/ixl/i40e_adminq.c optional ixl pci | ixlv pci \
+dev/ixl/i40e_nvm.c optional ixl iflib | ixlv iflib \
+ compile-with "${NORMAL_C} -I$S/dev/ixl"
+dev/ixl/i40e_adminq.c optional ixl iflib | ixlv iflib \
compile-with "${NORMAL_C} -I$S/dev/ixl"
dev/fdc/fdc.c optional fdc
dev/fdc/fdc_acpi.c optional fdc
Index: sys/conf/options
===================================================================
--- sys/conf/options
+++ sys/conf/options
@@ -138,6 +138,7 @@
GEOM_VIRSTOR opt_geom.h
GEOM_VOL opt_geom.h
GEOM_ZERO opt_geom.h
+IFLIB
KDTRACE_HOOKS opt_global.h
KDTRACE_FRAME opt_kdtrace.h
KN_HASHSIZE opt_kqueue.h
Index: sys/kern/device_if.m
===================================================================
--- sys/kern/device_if.m
+++ sys/kern/device_if.m
@@ -62,6 +62,11 @@
{
return 0;
}
+
+ static void * null_register(device_t dev)
+ {
+ return NULL;
+ }
};
/**
@@ -316,3 +321,24 @@
METHOD int quiesce {
device_t dev;
} DEFAULT null_quiesce;
+
+/**
+ * @brief This is called when the driver is asked to register handlers.
+ *
+ *
+ * To include this method in a device driver, use a line like this
+ * in the driver's method list:
+ *
+ * @code
+ * KOBJMETHOD(device_register, foo_register)
+ * @endcode
+ *
+ * @param dev the device for which handlers are being registered
+ *
+ * @retval NULL method not implemented
+ * @retval non-NULL a pointer to implementation specific static driver state
+ *
+ */
+METHOD void * register {
+ device_t dev;
+} DEFAULT null_register;
Index: sys/net/if.c
===================================================================
--- sys/net/if.c
+++ sys/net/if.c
@@ -3874,6 +3874,19 @@
return (count);
}
+int
+if_multi_apply(struct ifnet *ifp, int (*filter)(void *, struct ifmultiaddr *, int), void *arg)
+{
+ struct ifmultiaddr *ifma;
+ int cnt = 0;
+
+ if_maddr_rlock(ifp);
+ TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link)
+ cnt += filter(arg, ifma, cnt);
+ if_maddr_runlock(ifp);
+ return (cnt);
+}
+
struct mbuf *
if_dequeue(if_t ifp)
{
Index: sys/net/if_var.h
===================================================================
--- sys/net/if_var.h
+++ sys/net/if_var.h
@@ -628,6 +628,7 @@
int if_multiaddr_array(if_t ifp, void *mta, int *cnt, int max);
int if_multiaddr_count(if_t ifp, int max);
+int if_multi_apply(struct ifnet *ifp, int (*filter)(void *, struct ifmultiaddr *, int), void *arg);
int if_getamcount(if_t ifp);
struct ifaddr * if_getifaddr(if_t ifp);
Index: sys/net/ifdi_if.m
===================================================================
--- /dev/null
+++ sys/net/ifdi_if.m
@@ -0,0 +1,311 @@
+#
+# Copyright (c) 2014, Matthew Macy (kmacy@freebsd.org)
+# 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/types.h>
+#include <sys/systm.h>
+#include <sys/socket.h>
+
+#include <machine/bus.h>
+#include <sys/bus.h>
+
+#include <net/ethernet.h>
+#include <net/if.h>
+#include <net/if_var.h>
+#include <net/if_media.h>
+#include <net/iflib.h>
+
+INTERFACE ifdi;
+
+CODE {
+
+ static void
+ null_void_op(if_ctx_t _ctx __unused)
+ {
+ }
+
+ static void
+ null_timer_op(if_ctx_t _ctx __unused, uint16_t _qsidx __unused)
+ {
+ }
+
+ static int
+ null_int_op(if_ctx_t _ctx __unused)
+ {
+ return (0);
+ }
+
+ static void
+ null_queue_intr_enable(if_ctx_t _ctx __unused, uint16_t _qid __unused)
+ {
+ }
+
+ static void
+ null_led_func(if_ctx_t _ctx __unused, int _onoff __unused)
+ {
+ }
+
+ static void
+ null_vlan_register_op(if_ctx_t _ctx __unused, uint16_t vtag __unused)
+ {
+ }
+
+ static int
+ null_q_setup(if_ctx_t _ctx __unused, uint32_t _qid __unused)
+ {
+ return (0);
+ }
+
+ static int
+ null_i2c_req(if_ctx_t _sctx __unused, struct ifi2creq *_i2c __unused)
+ {
+ return (ENOTSUP);
+ }
+
+ static int
+ null_sysctl_int_delay(if_ctx_t _sctx __unused, if_int_delay_info_t _iidi __unused)
+ {
+ return (0);
+ }
+
+ static int
+ null_iov_init(if_ctx_t _ctx __unused, uint16_t num_vfs __unused, const nvlist_t *params __unused)
+ {
+ return (ENOTSUP);
+ }
+
+ static int
+ null_vf_add(if_ctx_t _ctx __unused, uint16_t num_vfs __unused, const nvlist_t *params __unused)
+ {
+ return (ENOTSUP);
+ }
+
+};
+
+#
+# bus interfaces
+#
+
+METHOD int attach_pre {
+ if_ctx_t _ctx;
+};
+
+METHOD int attach_post {
+ if_ctx_t _ctx;
+};
+
+METHOD int detach {
+ if_ctx_t _ctx;
+};
+
+METHOD int suspend {
+ if_ctx_t _ctx;
+} DEFAULT null_int_op;
+
+METHOD int shutdown {
+ if_ctx_t _ctx;
+} DEFAULT null_int_op;
+
+METHOD int resume {
+ if_ctx_t _ctx;
+} DEFAULT null_int_op;
+
+#
+# downcall to driver to allocate its
+# own queue state and tie it to the parent
+#
+
+METHOD int queues_alloc {
+ if_ctx_t _ctx;
+ caddr_t *_vaddrs;
+ uint64_t *_paddrs;
+ int nqs;
+};
+
+METHOD void queues_free {
+ if_ctx_t _ctx;
+};
+
+#
+# interface reset / stop
+#
+
+METHOD void init {
+ if_ctx_t _ctx;
+};
+
+METHOD void stop {
+ if_ctx_t _ctx;
+};
+
+#
+# interrupt setup and manipulation
+#
+
+METHOD int msix_intr_assign {
+ if_ctx_t _sctx;
+ int msix;
+};
+
+METHOD void intr_enable {
+ if_ctx_t _ctx;
+};
+
+METHOD void intr_disable {
+ if_ctx_t _ctx;
+};
+
+METHOD void queue_intr_enable {
+ if_ctx_t _ctx;
+ uint16_t _qid;
+} DEFAULT null_queue_intr_enable;
+
+METHOD void link_intr_enable {
+ if_ctx_t _ctx;
+} DEFAULT null_void_op;
+
+#
+# interface configuration
+#
+
+METHOD void multi_set {
+ if_ctx_t _ctx;
+};
+
+METHOD int mtu_set {
+ if_ctx_t _ctx;
+ uint32_t _mtu;
+};
+
+METHOD void media_set{
+ if_ctx_t _ctx;
+} DEFAULT null_void_op;
+
+METHOD int promisc_set {
+ if_ctx_t _ctx;
+ int _flags;
+};
+
+METHOD void crcstrip_set {
+ if_ctx_t _ctx;
+ int _onoff;
+};
+
+#
+# IOV handling
+#
+
+METHOD void vflr_handle {
+ if_ctx_t _ctx;
+} DEFAULT null_void_op;
+
+METHOD int iov_init {
+ if_ctx_t _ctx;
+ uint16_t num_vfs;
+ const nvlist_t * params;
+} DEFAULT null_iov_init;
+
+METHOD void iov_uninit {
+ if_ctx_t _ctx;
+} DEFAULT null_void_op;
+
+METHOD int iov_vf_add {
+ if_ctx_t _ctx;
+ uint16_t num_vfs;
+ const nvlist_t * params;
+} DEFAULT null_vf_add;
+
+
+#
+# Device status
+#
+
+METHOD void update_admin_status {
+ if_ctx_t _ctx;
+};
+
+METHOD void media_status {
+ if_ctx_t _ctx;
+ struct ifmediareq *_ifm;
+};
+
+METHOD int media_change {
+ if_ctx_t _ctx;
+};
+
+METHOD uint64_t get_counter {
+ if_ctx_t _sctx;
+ ift_counter cnt;
+};
+
+#
+# optional methods
+#
+
+METHOD int i2c_req {
+ if_ctx_t _ctx;
+ struct ifi2creq *_req;
+} DEFAULT null_i2c_req;
+
+METHOD int txq_setup {
+ if_ctx_t _ctx;
+ uint32_t _txqid;
+} DEFAULT null_q_setup;
+
+METHOD int rxq_setup {
+ if_ctx_t _ctx;
+ uint32_t _txqid;
+} DEFAULT null_q_setup;
+
+METHOD void timer {
+ if_ctx_t _ctx;
+ uint16_t _txqid;
+} DEFAULT null_timer_op;
+
+METHOD void watchdog_reset {
+ if_ctx_t _ctx;
+} DEFAULT null_void_op;
+
+METHOD void led_func {
+ if_ctx_t _ctx;
+ int _onoff;
+} DEFAULT null_led_func;
+
+METHOD void vlan_register {
+ if_ctx_t _ctx;
+ uint16_t _vtag;
+} DEFAULT null_vlan_register_op;
+
+METHOD void vlan_unregister {
+ if_ctx_t _ctx;
+ uint16_t _vtag;
+} DEFAULT null_vlan_register_op;
+
+METHOD int sysctl_int_delay {
+ if_ctx_t _sctx;
+ if_int_delay_info_t _iidi;
+} DEFAULT null_sysctl_int_delay;
+
+
Index: sys/net/iflib.h
===================================================================
--- /dev/null
+++ sys/net/iflib.h
@@ -0,0 +1,307 @@
+/*-
+ * Copyright (c) 2014-2015, Matthew Macy (mmacy@nextbsd.org)
+ * 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.
+ */
+#ifndef __IFLIB_H_
+#define __IFLIB_H_
+
+#include <sys/kobj.h>
+#include <sys/bus.h>
+#include <sys/cpuset.h>
+#include <machine/bus.h>
+#include <sys/bus_dma.h>
+#include <sys/nv.h>
+
+struct iflib_ctx;
+typedef struct iflib_ctx *if_ctx_t;
+struct if_shared_ctx;
+typedef struct if_shared_ctx *if_shared_ctx_t;
+struct if_int_delay_info;
+typedef struct if_int_delay_info *if_int_delay_info_t;
+
+/*
+ * File organization:
+ * - public structures
+ * - iflib accessors
+ * - iflib utility functions
+ * - iflib core functions
+ */
+
+typedef struct if_rxd_frag {
+ uint8_t irf_flid;
+ uint16_t irf_idx;
+} *if_rxd_frag_t;
+
+typedef struct if_rxd_info {
+ /* set by iflib */
+ uint16_t iri_qsidx; /* qset index */
+ uint16_t iri_vtag; /* vlan tag - if flag set */
+ uint16_t iri_len; /* packet length */
+ uint16_t iri_cidx; /* consumer index of cq */
+ struct ifnet *iri_ifp; /* some drivers >1 interface per softc */
+
+ /* updated by driver */
+ uint16_t iri_flags; /* mbuf flags for packet */
+ uint32_t iri_flowid; /* RSS hash for packet */
+ uint32_t iri_csum_flags; /* m_pkthdr csum flags */
+ uint32_t iri_csum_data; /* m_pkthdr csum data */
+ uint8_t iri_nfrags; /* number of fragments in packet */
+ uint8_t iri_rsstype; /* RSS hash type */
+ uint8_t iri_pad; /* any padding in the received data */
+ if_rxd_frag_t iri_frags;
+} *if_rxd_info_t;
+
+#define IPI_TX_INTR 0x1 /* send an interrupt when this packet is sent */
+#define IPI_TX_IPV4 0x2 /* ethertype IPv4 */
+#define IPI_TX_IPV6 0x4 /* ethertype IPv6 */
+
+typedef struct if_pkt_info {
+ uint32_t ipi_len; /* packet length */
+ bus_dma_segment_t *ipi_segs; /* physical addresses */
+ uint16_t ipi_qsidx; /* queue set index */
+ uint16_t ipi_nsegs; /* number of segments */
+ uint16_t ipi_ndescs; /* number of descriptors used by encap */
+ uint16_t ipi_flags; /* iflib per-packet flags */
+ uint32_t ipi_pidx; /* start pidx for encap */
+ uint32_t ipi_new_pidx; /* next available pidx post-encap */
+ /* offload handling */
+ uint64_t ipi_csum_flags; /* packet checksum flags */
+ uint16_t ipi_tso_segsz; /* tso segment size */
+ uint16_t ipi_mflags; /* packet mbuf flags */
+ uint16_t ipi_vtag; /* VLAN tag */
+ uint16_t ipi_etype; /* ether header type */
+ uint8_t ipi_ehdrlen; /* ether header length */
+ uint8_t ipi_ip_hlen; /* ip header length */
+ uint8_t ipi_tcp_hlen; /* tcp header length */
+ uint8_t ipi_tcp_hflags; /* tcp header flags */
+ uint8_t ipi_ipproto; /* ip protocol */
+ /* implied padding */
+ uint32_t ipi_tcp_seq; /* tcp seqno */
+ uint32_t ipi_tcp_sum; /* tcp csum */
+} *if_pkt_info_t;
+
+typedef struct if_irq {
+ struct resource *ii_res;
+ int ii_rid;
+ void *ii_tag;
+} *if_irq_t;
+
+struct if_int_delay_info {
+ if_ctx_t iidi_ctx; /* Back-pointer to the iflib ctx (softc) */
+ int iidi_offset; /* Register offset to read/write */
+ int iidi_value; /* Current value in usecs */
+ struct sysctl_oid *iidi_oidp;
+ struct sysctl_req *iidi_req;
+};
+
+typedef enum {
+ IFLIB_INTR_LEGACY,
+ IFLIB_INTR_MSI,
+ IFLIB_INTR_MSIX
+} iflib_intr_mode_t;
+
+/*
+ * This really belongs in pciio.h or some place more general
+ * but this is the only consumer for now.
+ */
+typedef struct pci_vendor_info {
+ uint32_t pvi_vendor_id;
+ uint32_t pvi_device_id;
+ uint32_t pvi_subvendor_id;
+ uint32_t pvi_subdevice_id;
+ uint32_t pvi_rev_id;
+ uint32_t pvi_class_mask;
+ caddr_t pvi_name;
+} pci_vendor_info_t;
+
+#define PVID(vendor, devid, name) {vendor, devid, 0, 0, 0, 0, name}
+#define PVID_OEM(vendor, devid, svid, sdevid, revid, name) {vendor, devid, svid, sdevid, revid, 0, name}
+#define PVID_END {0, 0, 0, 0, 0, 0, NULL}
+
+typedef struct if_txrx {
+ int (*ift_txd_encap) (void *, if_pkt_info_t);
+ void (*ift_txd_flush) (void *, uint16_t, uint32_t);
+ int (*ift_txd_credits_update) (void *, uint16_t, uint32_t, bool);
+
+ int (*ift_rxd_available) (void *, uint16_t qsidx, uint32_t pidx);
+ int (*ift_rxd_pkt_get) (void *, if_rxd_info_t ri);
+ void (*ift_rxd_refill) (void * , uint16_t qsidx, uint8_t flidx, uint32_t pidx,
+ uint64_t *paddrs, caddr_t *vaddrs, uint16_t count);
+ void (*ift_rxd_flush) (void *, uint16_t qsidx, uint8_t flidx, uint32_t pidx);
+ int (*ift_legacy_intr) (void *);
+} *if_txrx_t;
+
+typedef struct if_softc_ctx {
+ int isc_vectors;
+ int isc_nqsets;
+ int isc_msix_bar; /* can be model specific - initialize in attach_pre */
+ int isc_tx_nsegments; /* can be model specific - initialize in attach_pre */
+ int isc_tx_tso_segments_max;
+ int isc_tx_tso_size_max;
+ int isc_tx_tso_segsize_max;
+
+ iflib_intr_mode_t isc_intr;
+ uint16_t isc_max_frame_size; /* set at init time by driver */
+ pci_vendor_info_t isc_vendor_info; /* set by iflib prior to attach_pre */
+} *if_softc_ctx_t;
+
+/*
+ * Initialization values for device
+ */
+struct if_shared_ctx {
+ int isc_magic;
+ if_txrx_t isc_txrx;
+ driver_t *isc_driver;
+ int isc_ntxd;
+ int isc_nrxd;
+ int isc_nfl;
+ int isc_flags;
+ bus_size_t isc_q_align;
+ bus_size_t isc_tx_maxsize;
+ bus_size_t isc_tx_maxsegsize;
+ bus_size_t isc_rx_maxsize;
+ bus_size_t isc_rx_maxsegsize;
+ int isc_rx_nsegments;
+ int isc_rx_process_limit;
+
+
+ uint32_t isc_qsizes[8];
+ int isc_nqs; /* # of queues per qset - usually 2 */
+ int isc_admin_intrcnt; /* # of admin/link interrupts */
+
+ int isc_tx_reclaim_thresh;
+
+ /* fields necessary for probe */
+ pci_vendor_info_t *isc_vendor_info;
+ char *isc_driver_version;
+};
+
+#define IFLIB_MAGIC 0xCAFEF00D
+
+typedef enum {
+ IFLIB_INTR_TX,
+ IFLIB_INTR_RX,
+ IFLIB_INTR_ADMIN,
+ IFLIB_INTR_IOV,
+} iflib_intr_type_t;
+
+#ifndef ETH_ADDR_LEN
+#define ETH_ADDR_LEN 6
+#endif
+
+
+/*
+ * Interface has a separate command queue
+ */
+#define IFLIB_HAS_CQ 0x1
+/*
+ * Driver has already allocated vectors
+ */
+#define IFLIB_SKIP_MSIX 0x2
+
+/*
+ * Interface is a virtual function
+ */
+#define IFLIB_IS_VF 0x4
+
+
+/*
+ * field accessors
+ */
+void *iflib_get_softc(if_ctx_t ctx);
+
+device_t iflib_get_dev(if_ctx_t ctx);
+
+if_t iflib_get_ifp(if_ctx_t ctx);
+
+struct ifmedia *iflib_get_media(if_ctx_t ctx);
+
+if_softc_ctx_t iflib_get_softc_ctx(if_ctx_t ctx);
+if_shared_ctx_t iflib_get_sctx(if_ctx_t ctx);
+
+void iflib_set_mac(if_ctx_t ctx, uint8_t mac[ETHER_ADDR_LEN]);
+
+
+
+
+/*
+ * If the driver can plug cleanly in to newbus use these
+ */
+int iflib_device_probe(device_t);
+int iflib_device_attach(device_t);
+int iflib_device_detach(device_t);
+int iflib_device_suspend(device_t);
+int iflib_device_resume(device_t);
+int iflib_device_shutdown(device_t);
+
+
+int iflib_device_iov_init(device_t, uint16_t, const nvlist_t *);
+void iflib_device_iov_uninit(device_t);
+int iflib_device_iov_add_vf(device_t, uint16_t, const nvlist_t *);
+
+/*
+ * If the driver can't plug cleanly in to newbus
+ * use these
+ */
+int iflib_device_register(device_t dev, void *softc, if_shared_ctx_t sctx, if_ctx_t *ctxp);
+int iflib_device_deregister(if_ctx_t);
+
+
+
+int iflib_irq_alloc(if_ctx_t, if_irq_t, int, driver_filter_t, void *filter_arg, driver_intr_t, void *arg, char *name);
+int iflib_irq_alloc_generic(if_ctx_t ctx, if_irq_t irq, int rid,
+ iflib_intr_type_t type, driver_filter_t *filter,
+ void *filter_arg, int qid, char *name);
+void iflib_softirq_alloc_generic(if_ctx_t ctx, int rid, iflib_intr_type_t type, void *arg, int qid, char *name);
+
+void iflib_irq_free(if_ctx_t ctx, if_irq_t irq);
+
+void iflib_io_tqg_attach(struct grouptask *gt, void *uniq, int cpu, char *name);
+
+void iflib_config_gtask_init(if_ctx_t ctx, struct grouptask *gtask,
+ task_fn_t *fn, char *name);
+
+
+void iflib_tx_intr_deferred(if_ctx_t ctx, int txqid);
+void iflib_rx_intr_deferred(if_ctx_t ctx, int rxqid);
+void iflib_admin_intr_deferred(if_ctx_t ctx);
+void iflib_iov_intr_deferred(if_ctx_t ctx);
+
+
+void iflib_link_state_change(if_ctx_t ctx, int linkstate);
+
+
+
+
+
+struct mtx *iflib_ctx_lock_get(if_ctx_t);
+struct mtx *iflib_qset_lock_get(if_ctx_t, uint16_t);
+
+void iflib_led_create(if_ctx_t ctx);
+
+void iflib_add_int_delay_sysctl(if_ctx_t, const char *, const char *,
+ if_int_delay_info_t, int, int);
+
+#endif /* __IFLIB_H_ */
Index: sys/net/iflib.c
===================================================================
--- /dev/null
+++ sys/net/iflib.c
@@ -0,0 +1,4277 @@
+/*-
+ * Copyright (c) 2014-2015, Matthew Macy <mmacy@nextbsd.org>
+ * 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/param.h>
+#include <sys/types.h>
+#include <sys/bus.h>
+#include <sys/eventhandler.h>
+#include <sys/sockio.h>
+#include <sys/kernel.h>
+#include <sys/lock.h>
+#include <sys/mutex.h>
+#include <sys/module.h>
+#include <sys/kobj.h>
+#include <sys/rman.h>
+#include <sys/sbuf.h>
+#include <sys/smp.h>
+#include <sys/socket.h>
+#include <sys/sysctl.h>
+#include <sys/syslog.h>
+#include <sys/taskqueue.h>
+
+
+#include <net/if.h>
+#include <net/if_var.h>
+#include <net/if_types.h>
+#include <net/if_media.h>
+#include <net/bpf.h>
+#include <net/ethernet.h>
+#include <net/mp_ring.h>
+
+#include <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 <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 "opt_inet.h"
+#include "opt_inet6.h"
+
+#include "ifdi_if.h"
+
+/*
+ * File organization:
+ * - private structures
+ * - iflib private utility functions
+ * - ifnet functions
+ * - vlan registry and other exported functions
+ * - iflib public core functions
+ *
+ *
+ * Next steps:
+ *
+ * - validate queue teardown
+ * - validate that all structure fields are initialized
+
+ * - add SW RSS to demux received data packets to buf_rings for deferred processing
+ * look at handling tx ack processing
+ *
+ */
+static MALLOC_DEFINE(M_IFLIB, "iflib", "ifnet library");
+
+struct iflib_txq;
+typedef struct iflib_txq *iflib_txq_t;
+struct iflib_rxq;
+typedef struct iflib_rxq *iflib_rxq_t;
+struct iflib_qset;
+typedef struct iflib_qset *iflib_qset_t;
+struct iflib_fl;
+typedef struct iflib_fl *iflib_fl_t;
+
+typedef struct iflib_filter_info {
+ driver_filter_t *ifi_filter;
+ void *ifi_filter_arg;
+ struct grouptask *ifi_task;
+} *iflib_filter_info_t;
+
+struct iflib_ctx {
+ KOBJ_FIELDS;
+ /*
+ * Pointer to hardware driver's softc
+ */
+ void *ifc_softc;
+ device_t ifc_dev;
+ if_t ifc_ifp;
+
+ cpuset_t ifc_cpus;
+ if_shared_ctx_t ifc_sctx;
+ struct if_softc_ctx ifc_softc_ctx;
+
+ struct mtx ifc_mtx;
+ iflib_txq_t ifc_txqs;
+ iflib_rxq_t ifc_rxqs;
+ iflib_qset_t ifc_qsets;
+ uint32_t ifc_if_flags;
+ uint32_t ifc_flags;
+ uint32_t ifc_max_fl_buf_size;
+ int ifc_in_detach;
+
+ int ifc_link_state;
+ int ifc_link_irq;
+ int ifc_pause_frames;
+ 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 if_txrx ifc_txrx;
+#define isc_txd_encap ifc_txrx.ift_txd_encap
+#define isc_txd_flush ifc_txrx.ift_txd_flush
+#define isc_txd_credits_update ifc_txrx.ift_txd_credits_update
+#define isc_rxd_available ifc_txrx.ift_rxd_available
+#define isc_rxd_pkt_get ifc_txrx.ift_rxd_pkt_get
+#define isc_rxd_refill ifc_txrx.ift_rxd_refill
+#define isc_rxd_flush ifc_txrx.ift_rxd_flush
+#define isc_rxd_refill ifc_txrx.ift_rxd_refill
+#define isc_rxd_refill ifc_txrx.ift_rxd_refill
+#define isc_legacy_intr ifc_txrx.ift_legacy_intr
+ eventhandler_tag ifc_vlan_attach_event;
+ eventhandler_tag ifc_vlan_detach_event;
+ uint8_t ifc_mac[ETHER_ADDR_LEN];
+ char ifc_mtx_name[16];
+};
+
+
+void *
+iflib_get_softc(if_ctx_t ctx)
+{
+
+ return (ctx->ifc_softc);
+}
+
+device_t
+iflib_get_dev(if_ctx_t ctx)
+{
+
+ return (ctx->ifc_dev);
+}
+
+if_t
+iflib_get_ifp(if_ctx_t ctx)
+{
+
+ return (ctx->ifc_ifp);
+}
+
+struct ifmedia *
+iflib_get_media(if_ctx_t ctx)
+{
+
+ return (&ctx->ifc_media);
+}
+
+void
+iflib_set_mac(if_ctx_t ctx, uint8_t mac[ETHER_ADDR_LEN])
+{
+
+ bcopy(mac, ctx->ifc_mac, ETHER_ADDR_LEN);
+}
+
+if_softc_ctx_t
+iflib_get_softc_ctx(if_ctx_t ctx)
+{
+
+ return (&ctx->ifc_softc_ctx);
+}
+
+if_shared_ctx_t
+iflib_get_sctx(if_ctx_t ctx)
+{
+
+ return (ctx->ifc_sctx);
+}
+
+
+#define 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_dma_info {
+ bus_addr_t idi_paddr;
+ caddr_t idi_vaddr;
+ bus_dma_tag_t idi_tag;
+ bus_dmamap_t idi_map;
+ bus_dma_segment_t idi_seg;
+ int idi_nseg;
+ uint32_t idi_size;
+} *iflib_dma_info_t;
+
+struct iflib_qset {
+ iflib_dma_info_t ifq_ifdi;
+ uint16_t ifq_nhwqs;
+};
+
+#define RX_SW_DESC_MAP_CREATED (1 << 0)
+#define TX_SW_DESC_MAP_CREATED (1 << 1)
+#define RX_SW_DESC_INUSE (1 << 3)
+#define TX_SW_DESC_MAPPED (1 << 4)
+
+typedef struct iflib_sw_desc {
+ bus_dmamap_t ifsd_map; /* bus_dma map for packet */
+ struct mbuf *ifsd_m; /* rx: uninitialized mbuf
+ * tx: pkthdr for the packet
+ */
+ caddr_t ifsd_cl; /* direct cluster pointer for rx */
+ int ifsd_flags;
+
+ struct mbuf *ifsd_mh;
+ struct mbuf *ifsd_mt;
+} *iflib_sd_t;
+
+/* magic number that should be high enough for any hardware */
+#define IFLIB_MAX_TX_SEGS 128
+#define IFLIB_MAX_RX_SEGS 32
+#define IFLIB_RX_COPY_THRESH 128
+#define IFLIB_QUEUE_IDLE 0
+#define IFLIB_QUEUE_HUNG 1
+#define IFLIB_QUEUE_WORKING 2
+
+/* this should really scale with ring size - 32 is a fairly arbitrary value for this */
+#define TX_BATCH_SIZE 32
+
+#define IFLIB_BUDGET 64
+#define IFLIB_RESTART_BUDGET 8
+
+#define IFC_LEGACY 0x1
+#define IFC_QFLUSH 0x2
+#define IFC_MULTISEG 0x4
+#define IFC_DMAR 0x8
+
+#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 {
+ if_ctx_t ift_ctx;
+ uint32_t ift_in_use;
+ uint32_t ift_size;
+ uint32_t ift_processed;
+ uint32_t ift_cleaned;
+ uint32_t ift_cidx;
+ uint32_t ift_cidx_processed;
+ uint32_t ift_pidx;
+ uint32_t ift_gen;
+ uint32_t ift_db_pending;
+ uint32_t ift_npending;
+ 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_tx_irq;
+ int ift_closed;
+ struct callout ift_timer;
+ struct callout ift_db_check;
+
+ struct mtx ift_mtx;
+ struct mtx ift_db_mtx;
+ int ift_id;
+ iflib_sd_t ift_sds;
+ int ift_nbr;
+ struct ifmp_ring **ift_br;
+ struct grouptask ift_task;
+ int ift_qstatus;
+ int ift_active;
+ int ift_watchdog_time;
+ struct iflib_filter_info ift_filter_info;
+ bus_dma_tag_t ift_desc_tag;
+ bus_dma_tag_t ift_tso_desc_tag;
+ iflib_dma_info_t ift_ifdi;
+#define MTX_NAME_LEN 16
+ char ift_mtx_name[MTX_NAME_LEN];
+ char ift_db_mtx_name[MTX_NAME_LEN];
+ bus_dma_segment_t ift_segs[IFLIB_MAX_TX_SEGS] __aligned(CACHE_LINE_SIZE);
+};
+
+struct iflib_fl {
+ uint32_t ifl_cidx;
+ uint32_t ifl_pidx;
+ uint32_t ifl_gen;
+ uint32_t ifl_size;
+ uint32_t ifl_credits;
+ uint32_t ifl_buf_size;
+ int ifl_cltype;
+ uma_zone_t ifl_zone;
+
+ iflib_sd_t ifl_sds;
+ iflib_rxq_t ifl_rxq;
+ uint8_t ifl_id;
+ bus_dma_tag_t ifl_desc_tag;
+ iflib_dma_info_t ifl_ifdi;
+ uint64_t ifl_bus_addrs[256];
+ caddr_t ifl_vm_addrs[256];
+};
+
+static inline int
+get_inuse(int size, int cidx, int pidx, int gen)
+{
+ int 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))
+
+typedef struct iflib_global_context {
+ struct taskqgroup *igc_io_tqg; /* per-cpu taskqueues for io */
+ struct taskqgroup *igc_config_tqg; /* taskqueue for config operations */
+} iflib_global_context_t;
+
+struct iflib_global_context global_ctx, *gctx;
+
+struct iflib_rxq {
+ /* If there is a separate completion queue -
+ * these are the cq cidx and pidx. Otherwise
+ * these are unused.
+ */
+ uint32_t ifr_size;
+ uint32_t ifr_cidx;
+ uint32_t ifr_pidx;
+ uint32_t ifr_gen;
+
+ if_ctx_t ifr_ctx;
+ uint64_t ifr_rx_irq;
+ uint16_t ifr_id;
+ int ifr_lro_enabled;
+ iflib_fl_t ifr_fl;
+ uint8_t ifr_nfl;
+ struct lro_ctrl ifr_lc;
+ struct grouptask ifr_task;
+ struct iflib_filter_info ifr_filter_info;
+ iflib_dma_info_t ifr_ifdi;
+ /* dynamically allocate if any drivers need a value substantially larger than this */
+ struct if_rxd_frag ifr_frags[IFLIB_MAX_RX_SEGS] __aligned(CACHE_LINE_SIZE);
+};
+
+/*
+ * 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 (uint64_t)-1
+
+static int enable_msix = 1;
+
+#define mtx_held(m) (((m)->mtx_lock & ~MTX_FLAGMASK) != (uintptr_t)0)
+
+
+
+#define CTX_ACTIVE(ctx) ((if_getdrvflags((ctx)->ifc_ifp) & IFF_DRV_RUNNING))
+
+#define CTX_LOCK_INIT(_sc, _name) mtx_init(&(_sc)->ifc_mtx, _name, "iflib ctx lock", MTX_DEF)
+
+#define CTX_LOCK(ctx) mtx_lock(&(ctx)->ifc_mtx)
+#define CTX_UNLOCK(ctx) mtx_unlock(&(ctx)->ifc_mtx)
+#define CTX_LOCK_DESTROY(ctx) mtx_destroy(&(ctx)->ifc_mtx)
+
+
+#define TXDB_LOCK_INIT(txq) mtx_init(&(txq)->ift_db_mtx, (txq)->ift_db_mtx_name, NULL, MTX_DEF)
+#define TXDB_TRYLOCK(txq) mtx_trylock(&(txq)->ift_db_mtx)
+#define TXDB_LOCK(txq) mtx_lock(&(txq)->ift_db_mtx)
+#define TXDB_UNLOCK(txq) mtx_unlock(&(txq)->ift_db_mtx)
+#define TXDB_LOCK_DESTROY(txq) mtx_destroy(&(txq)->ift_db_mtx)
+
+#define CALLOUT_LOCK(txq) mtx_lock(&txq->ift_mtx)
+#define CALLOUT_UNLOCK(txq) mtx_unlock(&txq->ift_mtx)
+
+
+/* Our boot-time initialization hook */
+static int iflib_module_event_handler(module_t, int, void *);
+
+static moduledata_t iflib_moduledata = {
+ "iflib",
+ iflib_module_event_handler,
+ NULL
+};
+
+DECLARE_MODULE(iflib, iflib_moduledata, SI_SUB_INIT_IF, SI_ORDER_ANY);
+MODULE_VERSION(iflib, 1);
+
+MODULE_DEPEND(iflib, pci, 1, 1, 1);
+MODULE_DEPEND(iflib, ether, 1, 1, 1);
+
+TASKQGROUP_DEFINE(if_io_tqg, mp_ncpus, 1);
+TASKQGROUP_DEFINE(if_config_tqg, 1, 1);
+
+#ifndef IFLIB_DEBUG_COUNTERS
+#ifdef INVARIANTS
+#define IFLIB_DEBUG_COUNTERS 1
+#else
+#define IFLIB_DEBUG_COUNTERS 0
+#endif /* !INVARIANTS */
+#endif
+
+static SYSCTL_NODE(_net, OID_AUTO, iflib, CTLFLAG_RD, 0,
+ "iflib driver parameters");
+
+/*
+ * XXX need to ensure that this can't accidentally cause the head to be moved backwards
+ */
+static int iflib_min_tx_latency = 0;
+
+SYSCTL_INT(_net_iflib, OID_AUTO, min_tx_latency, CTLFLAG_RW,
+ &iflib_min_tx_latency, 0, "minimize transmit latency at the possibel expense of throughput");
+/* determined by iflib */
+static int iflib_num_queues = 0;
+SYSCTL_INT(_net_iflib, OID_AUTO, num_queues, CTLFLAG_RWTUN, &iflib_num_queues, 0,
+ "Number of queues to configure, 0 indicates autoconfigure");
+
+
+
+#if IFLIB_DEBUG_COUNTERS
+
+static int iflib_tx_seen;
+static int iflib_tx_sent;
+static int iflib_tx_encap;
+static int iflib_rx_allocs;
+static int iflib_fl_refills;
+static int iflib_fl_refills_large;
+static int iflib_tx_frees;
+
+SYSCTL_INT(_net_iflib, OID_AUTO, tx_seen, CTLFLAG_RD,
+ &iflib_tx_seen, 0, "# tx mbufs seen");
+SYSCTL_INT(_net_iflib, OID_AUTO, tx_sent, CTLFLAG_RD,
+ &iflib_tx_sent, 0, "# tx mbufs sent");
+SYSCTL_INT(_net_iflib, OID_AUTO, tx_encap, CTLFLAG_RD,
+ &iflib_tx_encap, 0, "# tx mbufs encapped");
+SYSCTL_INT(_net_iflib, OID_AUTO, tx_frees, CTLFLAG_RD,
+ &iflib_tx_frees, 0, "# tx frees");
+SYSCTL_INT(_net_iflib, OID_AUTO, rx_allocs, CTLFLAG_RD,
+ &iflib_rx_allocs, 0, "# rx allocations");
+SYSCTL_INT(_net_iflib, OID_AUTO, fl_refills, CTLFLAG_RD,
+ &iflib_fl_refills, 0, "# refills");
+SYSCTL_INT(_net_iflib, OID_AUTO, fl_refills_large, CTLFLAG_RD,
+ &iflib_fl_refills_large, 0, "# large refills");
+
+
+static int iflib_txq_drain_flushing;
+static int iflib_txq_drain_oactive;
+static int iflib_txq_drain_notready;
+static int iflib_txq_drain_encapfail;
+
+SYSCTL_INT(_net_iflib, OID_AUTO, txq_drain_flushing, CTLFLAG_RD,
+ &iflib_txq_drain_flushing, 0, "# drain flushes");
+SYSCTL_INT(_net_iflib, OID_AUTO, txq_drain_oactive, CTLFLAG_RD,
+ &iflib_txq_drain_oactive, 0, "# drain oactives");
+SYSCTL_INT(_net_iflib, OID_AUTO, txq_drain_notready, CTLFLAG_RD,
+ &iflib_txq_drain_notready, 0, "# drain notready");
+SYSCTL_INT(_net_iflib, OID_AUTO, txq_drain_encapfail, CTLFLAG_RD,
+ &iflib_txq_drain_encapfail, 0, "# drain encap fails");
+
+
+static int iflib_encap_load_mbuf_fail;
+static int iflib_encap_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_txq_avail_fail, CTLFLAG_RD,
+ &iflib_encap_txq_avail_fail, 0, "# txq avail failures");
+SYSCTL_INT(_net_iflib, OID_AUTO, encap_txd_encap_fail, CTLFLAG_RD,
+ &iflib_encap_txd_encap_fail, 0, "# driver encap failures");
+
+static int iflib_task_fn_rxs;
+static int iflib_rx_intr_enables;
+static int iflib_fast_intrs;
+static int iflib_intr_link;
+static int iflib_intr_msix;
+static int iflib_rx_unavail;
+static int iflib_rx_ctx_inactive;
+static int iflib_rx_zero_len;
+static int iflib_rx_if_input;
+static int iflib_rx_mbuf_null;
+static int iflib_rxd_flush;
+
+static int iflib_verbose_debug;
+
+SYSCTL_INT(_net_iflib, OID_AUTO, intr_link, CTLFLAG_RD,
+ &iflib_intr_link, 0, "# intr link calls");
+SYSCTL_INT(_net_iflib, OID_AUTO, intr_msix, CTLFLAG_RD,
+ &iflib_intr_msix, 0, "# intr msix calls");
+SYSCTL_INT(_net_iflib, OID_AUTO, task_fn_rx, CTLFLAG_RD,
+ &iflib_task_fn_rxs, 0, "# task_fn_rx calls");
+SYSCTL_INT(_net_iflib, OID_AUTO, rx_intr_enables, CTLFLAG_RD,
+ &iflib_rx_intr_enables, 0, "# rx intr enables");
+SYSCTL_INT(_net_iflib, OID_AUTO, fast_intrs, CTLFLAG_RD,
+ &iflib_fast_intrs, 0, "# fast_intr calls");
+SYSCTL_INT(_net_iflib, OID_AUTO, rx_unavail, CTLFLAG_RD,
+ &iflib_rx_unavail, 0, "# times rxeof called with no available data");
+SYSCTL_INT(_net_iflib, OID_AUTO, rx_ctx_inactive, CTLFLAG_RD,
+ &iflib_rx_ctx_inactive, 0, "# times rxeof called with inactive context");
+SYSCTL_INT(_net_iflib, OID_AUTO, rx_zero_len, CTLFLAG_RD,
+ &iflib_rx_zero_len, 0, "# times rxeof saw zero len mbuf");
+SYSCTL_INT(_net_iflib, OID_AUTO, rx_if_input, CTLFLAG_RD,
+ &iflib_rx_if_input, 0, "# times rxeof called if_input");
+SYSCTL_INT(_net_iflib, OID_AUTO, rx_mbuf_null, CTLFLAG_RD,
+ &iflib_rx_mbuf_null, 0, "# times rxeof got null mbuf");
+SYSCTL_INT(_net_iflib, OID_AUTO, rxd_flush, CTLFLAG_RD,
+ &iflib_rxd_flush, 0, "# times rxd_flush called");
+SYSCTL_INT(_net_iflib, OID_AUTO, verbose_debug, CTLFLAG_RW,
+ &iflib_verbose_debug, 0, "enable verbose debugging");
+
+#define DBG_COUNTER_INC(name) atomic_add_int(&(iflib_ ## name), 1)
+
+#else
+#define DBG_COUNTER_INC(name)
+
+#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, int cidx);
+static int iflib_qset_structures_setup(if_ctx_t ctx);
+static int iflib_msix_init(if_ctx_t ctx);
+static int iflib_legacy_setup(if_ctx_t ctx, driver_filter_t filter, void *filterarg, int *rid, char *str);
+static void iflib_txq_check_drain(iflib_txq_t txq, int budget);
+static uint32_t iflib_txq_can_drain(struct ifmp_ring *);
+static int iflib_register(if_ctx_t);
+static void iflib_init_locked(if_ctx_t ctx);
+static void iflib_add_device_sysctl(if_ctx_t ctx);
+
+
+#ifdef DEV_NETMAP
+#include <sys/selinfo.h>
+#include <net/netmap.h>
+#include <dev/netmap/netmap_kern.h>
+
+MODULE_DEPEND(iflib, netmap, 1, 1, 1);
+
+/*
+ * device-specific sysctl variables:
+ *
+ * ixl_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.
+ *
+ * ixl_rx_miss, ixl_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, ixl_rx_miss_bufs,
+ CTLFLAG_RW, &iflib_rx_miss_bufs, 0, "potentially missed rx intr bufs");
+
+/*
+ * Register/unregister. We are already under netmap lock.
+ * Only called on the first register or the last unregister.
+ */
+static int
+iflib_netmap_register(struct netmap_adapter *na, int onoff)
+{
+ struct ifnet *ifp = na->ifp;
+ if_ctx_t ctx = ifp->if_softc;
+
+ CTX_LOCK(ctx);
+ IFDI_INTR_DISABLE(ctx);
+
+ /* Tell the stack that the interface is no longer active */
+ ifp->if_drv_flags &= ~(IFF_DRV_RUNNING | IFF_DRV_OACTIVE);
+
+ if (!CTX_IS_VF(ctx))
+ IFDI_CRCSTRIP_SET(ctx, onoff);
+
+ /* enable or disable flags and callbacks in na and ifp */
+ if (onoff) {
+ nm_set_native_flags(na);
+ } else {
+ nm_clear_native_flags(na);
+ }
+ IFDI_INIT(ctx);
+ IFDI_CRCSTRIP_SET(ctx, onoff); // XXX why twice ?
+ CTX_UNLOCK(ctx);
+ return (ifp->if_drv_flags & IFF_DRV_RUNNING ? 0 : 1);
+}
+
+/*
+ * Reconcile kernel and user view of the transmit ring.
+ *
+ * All information is in the kring.
+ * Userspace wants to send packets up to the one before kring->rhead,
+ * kernel knows kring->nr_hwcur is the first unsent packet.
+ *
+ * Here we push packets out (as many as possible), and possibly
+ * reclaim buffers from previously completed transmission.
+ *
+ * The caller (netmap) guarantees that there is only one instance
+ * running at any time. Any interference with other driver
+ * methods should be handled by the individual drivers.
+ */
+static int
+iflib_netmap_txsync(struct netmap_kring *kring, int flags)
+{
+ struct netmap_adapter *na = kring->na;
+ struct ifnet *ifp = na->ifp;
+ struct netmap_ring *ring = kring->ring;
+ u_int nm_i; /* index into the netmap ring */
+ u_int nic_i; /* index into the NIC ring */
+ u_int n;
+ u_int const lim = kring->nkr_num_slots - 1;
+ u_int const head = kring->rhead;
+ struct if_pkt_info pi;
+
+ /*
+ * interrupts on every tx packet are expensive so request
+ * them every half ring, or where NS_REPORT is set
+ */
+ u_int report_frequency = kring->nkr_num_slots >> 1;
+ /* device-specific */
+ if_ctx_t ctx = ifp->if_softc;
+ iflib_txq_t txq = &ctx->ifc_txqs[kring->ring_id];
+
+ pi.ipi_segs = txq->ift_segs;
+ pi.ipi_qsidx = kring->ring_id;
+ pi.ipi_ndescs = 0;
+
+ bus_dmamap_sync(txq->ift_desc_tag, txq->ift_ifdi->idi_map,
+ BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE);
+
+
+ /*
+ * First part: process new packets to send.
+ * nm_i is the current index in the netmap ring,
+ * nic_i is the corresponding index in the NIC ring.
+ *
+ * If we have packets to send (nm_i != head)
+ * iterate over the netmap ring, fetch length and update
+ * the corresponding slot in the NIC ring. Some drivers also
+ * need to update the buffer's physical address in the NIC slot
+ * even NS_BUF_CHANGED is not set (PNMB computes the addresses).
+ *
+ * The netmap_reload_map() calls is especially expensive,
+ * even when (as in this case) the tag is 0, so do only
+ * when the buffer has actually changed.
+ *
+ * If possible do not set the report/intr bit on all slots,
+ * but only a few times per ring or when NS_REPORT is set.
+ *
+ * Finally, on 10G and faster drivers, it might be useful
+ * to prefetch the next slot and txr entry.
+ */
+
+ nm_i = kring->nr_hwcur;
+ if (nm_i != head) { /* we have new packets to send */
+ nic_i = netmap_idx_k2n(kring, nm_i);
+
+ __builtin_prefetch(&ring->slot[nm_i]);
+ __builtin_prefetch(&txq->ift_sds[nic_i]);
+
+ for (n = 0; nm_i != head; n++) {
+ struct netmap_slot *slot = &ring->slot[nm_i];
+ u_int len = slot->len;
+ uint64_t paddr;
+ void *addr = PNMB(na, slot, &paddr);
+ int flags = (slot->flags & NS_REPORT ||
+ nic_i == 0 || nic_i == report_frequency) ?
+ IPI_TX_INTR : 0;
+
+ /* device-specific */
+ pi.ipi_pidx = nic_i;
+ pi.ipi_flags = flags;
+
+ /* Fill the slot in the NIC ring. */
+ ctx->isc_txd_encap(ctx->ifc_softc, &pi);
+
+ /* prefetch for next round */
+ __builtin_prefetch(&ring->slot[nm_i + 1]);
+ __builtin_prefetch(&txq->ift_sds[nic_i + 1]);
+
+ NM_CHECK_ADDR_LEN(na, addr, len);
+
+ if (slot->flags & NS_BUF_CHANGED) {
+ /* buffer has changed, reload map */
+ netmap_reload_map(na, txq->ift_desc_tag, txq->ift_sds[nic_i].ifsd_map, addr);
+ }
+ slot->flags &= ~(NS_REPORT | NS_BUF_CHANGED);
+
+ /* make sure changes to the buffer are synced */
+ bus_dmamap_sync(txq->ift_ifdi->idi_tag, txq->ift_sds[nic_i].ifsd_map,
+ BUS_DMASYNC_PREWRITE);
+
+ nm_i = nm_next(nm_i, lim);
+ nic_i = nm_next(nic_i, lim);
+ }
+ kring->nr_hwcur = head;
+
+ /* synchronize the NIC ring */
+ bus_dmamap_sync(txq->ift_desc_tag, txq->ift_ifdi->idi_map,
+ BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);
+
+ /* (re)start the tx unit up to slot nic_i (excluded) */
+ ctx->isc_txd_flush(ctx->ifc_softc, txq->ift_id, nic_i);
+ }
+
+ /*
+ * Second part: reclaim buffers for completed transmissions.
+ */
+ if (iflib_tx_credits_update(ctx, txq)) {
+ /* some tx completed, increment avail */
+ nic_i = txq->ift_cidx_processed;
+ kring->nr_hwtail = nm_prev(netmap_idx_n2k(kring, nic_i), lim);
+ }
+ return (0);
+}
+
+/*
+ * Reconcile kernel and user view of the receive ring.
+ * Same as for the txsync, this routine must be efficient.
+ * The caller guarantees a single invocations, but races against
+ * the rest of the driver should be handled here.
+ *
+ * On call, kring->rhead is the first packet that userspace wants
+ * to keep, and kring->rcur is the wakeup point.
+ * The kernel has previously reported packets up to kring->rtail.
+ *
+ * If (flags & NAF_FORCE_READ) also check for incoming packets irrespective
+ * of whether or not we received an interrupt.
+ */
+static int
+iflib_netmap_rxsync(struct netmap_kring *kring, int flags)
+{
+ struct netmap_adapter *na = kring->na;
+ struct ifnet *ifp = na->ifp;
+ struct netmap_ring *ring = kring->ring;
+ u_int nm_i; /* index into the netmap ring */
+ u_int nic_i; /* index into the NIC ring */
+ u_int i, n;
+ u_int const lim = kring->nkr_num_slots - 1;
+ u_int const head = kring->rhead;
+ int force_update = (flags & NAF_FORCE_READ) || kring->nr_kflags & NKR_PENDINTR;
+ struct if_rxd_info ri;
+ /* device-specific */
+ if_ctx_t ctx = ifp->if_softc;
+ iflib_rxq_t rxq = &ctx->ifc_rxqs[kring->ring_id];
+ iflib_fl_t fl = rxq->ifr_fl;
+ if (head > lim)
+ return netmap_ring_reinit(kring);
+
+ bzero(&ri, sizeof(ri));
+ ri.iri_qsidx = kring->ring_id;
+ ri.iri_ifp = ctx->ifc_ifp;
+ /* XXX check sync modes */
+ for (i = 0, fl = rxq->ifr_fl; i < rxq->ifr_nfl; i++, fl++)
+ bus_dmamap_sync(rxq->ifr_fl[i].ifl_desc_tag, fl->ifl_ifdi->idi_map,
+ BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE);
+
+ /*
+ * First part: import newly received packets.
+ *
+ * nm_i is the index of the next free slot in the netmap ring,
+ * nic_i is the index of the next received packet in the NIC ring,
+ * and they may differ in case if_init() has been called while
+ * in netmap mode. For the receive ring we have
+ *
+ * nic_i = rxr->next_check;
+ * nm_i = kring->nr_hwtail (previous)
+ * and
+ * nm_i == (nic_i + kring->nkr_hwofs) % ring_size
+ *
+ * rxr->next_check is set to 0 on a ring reinit
+ */
+ if (netmap_no_pendintr || force_update) {
+ int crclen = iflib_crcstrip ? 0 : 4;
+ int error, avail;
+ uint16_t slot_flags = kring->nkr_slot_flags;
+
+ for (fl = rxq->ifr_fl, i = 0; i < rxq->ifr_nfl; i++, fl++) {
+ nic_i = fl->ifl_cidx;
+ nm_i = netmap_idx_n2k(kring, nic_i);
+ avail = ctx->isc_rxd_available(ctx->ifc_softc, kring->ring_id, nic_i);
+ for (n = 0; avail > 0; n++, avail--) {
+ error = ctx->isc_rxd_pkt_get(ctx->ifc_softc, &ri);
+ if (error)
+ ring->slot[nm_i].len = 0;
+ else
+ ring->slot[nm_i].len = ri.iri_len - crclen;
+ ring->slot[nm_i].flags = slot_flags;
+ bus_dmamap_sync(fl->ifl_ifdi->idi_tag,
+ fl->ifl_sds[nic_i].ifsd_map, BUS_DMASYNC_POSTREAD);
+ nm_i = nm_next(nm_i, lim);
+ nic_i = nm_next(nic_i, lim);
+ }
+ if (n) { /* update the state variables */
+ if (netmap_no_pendintr && !force_update) {
+ /* diagnostics */
+ iflib_rx_miss ++;
+ iflib_rx_miss_bufs += n;
+ }
+ fl->ifl_cidx = nic_i;
+ kring->nr_hwtail = nm_i;
+ }
+ kring->nr_kflags &= ~NKR_PENDINTR;
+ }
+ }
+ /*
+ * Second part: skip past packets that userspace has released.
+ * (kring->nr_hwcur to head excluded),
+ * and make the buffers available for reception.
+ * As usual nm_i is the index in the netmap ring,
+ * nic_i is the index in the NIC ring, and
+ * nm_i == (nic_i + kring->nkr_hwofs) % ring_size
+ */
+ /* XXX not sure how this will work with multiple free lists */
+ nm_i = kring->nr_hwcur;
+ if (nm_i != head) {
+ nic_i = netmap_idx_k2n(kring, nm_i);
+ for (n = 0; nm_i != head; n++) {
+ struct netmap_slot *slot = &ring->slot[nm_i];
+ uint64_t paddr;
+ caddr_t vaddr;
+ void *addr = PNMB(na, slot, &paddr);
+
+ if (addr == NETMAP_BUF_BASE(na)) /* bad buf */
+ goto ring_reset;
+
+ vaddr = addr;
+ if (slot->flags & NS_BUF_CHANGED) {
+ /* buffer has changed, reload map */
+ netmap_reload_map(na, fl->ifl_ifdi->idi_tag, fl->ifl_sds[nic_i].ifsd_map, addr);
+ slot->flags &= ~NS_BUF_CHANGED;
+ }
+ /*
+ * XXX we should be batching this operation - TODO
+ */
+ ctx->isc_rxd_refill(ctx->ifc_softc, rxq->ifr_id, fl->ifl_id, nic_i, &paddr, &vaddr, 1);
+ bus_dmamap_sync(fl->ifl_ifdi->idi_tag, fl->ifl_sds[nic_i].ifsd_map,
+ BUS_DMASYNC_PREREAD);
+ nm_i = nm_next(nm_i, lim);
+ nic_i = nm_next(nic_i, lim);
+ }
+ kring->nr_hwcur = head;
+
+ bus_dmamap_sync(fl->ifl_ifdi->idi_tag, fl->ifl_ifdi->idi_map,
+ BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);
+ /*
+ * IMPORTANT: we must leave one free slot in the ring,
+ * so move nic_i back by one unit
+ */
+ nic_i = nm_prev(nic_i, lim);
+ ctx->isc_rxd_flush(ctx->ifc_softc, rxq->ifr_id, fl->ifl_id, nic_i);
+ }
+
+ return 0;
+
+ring_reset:
+ return netmap_ring_reinit(kring);
+}
+
+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;
+ MPASS(ctx->ifc_softc_ctx.isc_nqsets);
+
+ na.num_tx_desc = ctx->ifc_sctx->isc_ntxd;
+ na.num_rx_desc = ctx->ifc_sctx->isc_ntxd;
+ na.nm_txsync = iflib_netmap_txsync;
+ na.nm_rxsync = iflib_netmap_rxsync;
+ na.nm_register = iflib_netmap_register;
+ na.num_tx_rings = na.num_rx_rings = ctx->ifc_softc_ctx.isc_nqsets;
+ return (netmap_attach(&na));
+}
+
+static void
+iflib_netmap_txq_init(if_ctx_t ctx, iflib_txq_t txq)
+{
+ struct netmap_adapter *na = NA(ctx->ifc_ifp);
+ struct netmap_slot *slot;
+ iflib_sd_t sd;
+
+ slot = netmap_reset(na, NR_TX, txq->ift_id, 0);
+ if (slot == 0)
+ return;
+
+ sd = txq->ift_sds;
+ for (int i = 0; i < ctx->ifc_sctx->isc_ntxd; i++, sd++) {
+
+ /*
+ * In netmap mode, set the map for the packet buffer.
+ * NOTE: Some drivers (not this one) also need to set
+ * the physical buffer address in the NIC ring.
+ * netmap_idx_n2k() maps a nic index, i, into the corresponding
+ * netmap slot index, si
+ */
+ int si = netmap_idx_n2k(&na->tx_rings[txq->ift_id], i);
+ netmap_load_map(na, txq->ift_desc_tag, sd->ifsd_map, NMB(na, slot + si));
+ }
+}
+static void
+iflib_netmap_rxq_init(if_ctx_t ctx, iflib_rxq_t rxq)
+{
+ struct netmap_adapter *na = NA(ctx->ifc_ifp);
+ struct netmap_slot *slot;
+ iflib_sd_t sd;
+ int nrxd;
+
+ slot = netmap_reset(na, NR_RX, rxq->ifr_id, 0);
+ if (slot == 0)
+ return;
+ sd = rxq->ifr_fl[0].ifl_sds;
+ nrxd = ctx->ifc_sctx->isc_nrxd;
+ for (int i = 0; i < nrxd; i++, sd++) {
+ int sj = netmap_idx_n2k(&na->rx_rings[rxq->ifr_id], i);
+ uint64_t paddr;
+ void *addr;
+ caddr_t vaddr;
+
+ vaddr = addr = PNMB(na, slot + sj, &paddr);
+ netmap_load_map(na, rxq->ifr_fl[0].ifl_ifdi->idi_tag, sd->ifsd_map, addr);
+ /* Update descriptor and the cached value */
+ ctx->isc_rxd_refill(ctx->ifc_softc, rxq->ifr_id, 0 /* fl_id */, i, &paddr, &vaddr, 1);
+ }
+ /* preserve queue */
+ if (ctx->ifc_ifp->if_capenable & IFCAP_NETMAP) {
+ struct netmap_kring *kring = &na->rx_rings[rxq->ifr_id];
+ int t = na->num_rx_desc - 1 - nm_kr_rxspace(kring);
+ ctx->isc_rxd_flush(ctx->ifc_softc, rxq->ifr_id, 0 /* fl_id */, t);
+ } else
+ ctx->isc_rxd_flush(ctx->ifc_softc, rxq->ifr_id, 0 /* fl_id */, nrxd-1);
+}
+
+#define iflib_netmap_detach(ifp) netmap_detach(ifp)
+
+#else
+#define iflib_netmap_txq_init(ctx, txq)
+#define iflib_netmap_rxq_init(ctx, rxq)
+#define iflib_netmap_detach(ifp)
+
+#define iflib_netmap_attach(ctx) (0)
+#define netmap_rx_irq(ifp, qid, budget) (0)
+
+#endif
+
+#if defined(__i386__) || defined(__amd64__)
+static __inline void
+prefetch(void *x)
+{
+ __asm volatile("prefetcht0 %0" :: "m" (*(unsigned long *)x));
+}
+#else
+#define prefetch(x)
+#endif
+
+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;
+}
+
+static int
+iflib_dma_alloc(if_ctx_t ctx, bus_size_t size, iflib_dma_info_t dma,
+ int mapflags)
+{
+ int err;
+ if_shared_ctx_t sctx = ctx->ifc_sctx;
+ device_t dev = ctx->ifc_dev;
+
+ KASSERT(sctx->isc_q_align != 0, ("alignment value not initialized"));
+
+ err = bus_dma_tag_create(bus_get_dma_tag(dev), /* parent */
+ sctx->isc_q_align, 0, /* alignment, bounds */
+ BUS_SPACE_MAXADDR, /* lowaddr */
+ BUS_SPACE_MAXADDR, /* highaddr */
+ NULL, NULL, /* filter, filterarg */
+ size, /* maxsize */
+ 1, /* nsegments */
+ size, /* maxsegsize */
+ BUS_DMA_ALLOCNOW, /* flags */
+ NULL, /* lockfunc */
+ NULL, /* lockarg */
+ &dma->idi_tag);
+ if (err) {
+ device_printf(dev,
+ "%s: bus_dma_tag_create failed: %d\n",
+ __func__, err);
+ goto fail_0;
+ }
+
+ err = bus_dmamem_alloc(dma->idi_tag, (void**) &dma->idi_vaddr,
+ BUS_DMA_NOWAIT | BUS_DMA_COHERENT, &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);
+}
+
+static 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;
+}
+
+static int
+iflib_fast_intr(void *arg)
+{
+ iflib_filter_info_t info = arg;
+ struct grouptask *gtask = info->ifi_task;
+
+ DBG_COUNTER_INC(fast_intrs);
+ if (info->ifi_filter != NULL && info->ifi_filter(info->ifi_filter_arg) == FILTER_HANDLED)
+ return (FILTER_HANDLED);
+
+ GROUPTASK_ENQUEUE(gtask);
+ return (FILTER_HANDLED);
+}
+
+static int
+_iflib_irq_alloc(if_ctx_t ctx, if_irq_t irq, int rid,
+ driver_filter_t filter, driver_intr_t handler, void *arg,
+ char *name)
+{
+ int rc;
+ struct resource *res;
+ void *tag;
+ device_t dev = ctx->ifc_dev;
+
+ MPASS(rid < 512);
+ irq->ii_rid = rid;
+ res = bus_alloc_resource_any(dev, SYS_RES_IRQ, &irq->ii_rid,
+ RF_SHAREABLE | RF_ACTIVE);
+ 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, name);
+
+ irq->ii_tag = tag;
+ return (0);
+}
+
+
+/*********************************************************************
+ *
+ * Allocate memory for tx_buffer structures. The tx_buffer stores all
+ * the information needed to transmit a packet on the wire. This is
+ * called only once at attach, setup is done every reset.
+ *
+ **********************************************************************/
+
+static int
+iflib_txsd_alloc(iflib_txq_t txq)
+{
+ if_ctx_t ctx = txq->ift_ctx;
+ if_shared_ctx_t sctx = ctx->ifc_sctx;
+ if_softc_ctx_t scctx = &ctx->ifc_softc_ctx;
+ device_t dev = ctx->ifc_dev;
+ iflib_sd_t txsd;
+ int err, i, nsegments, ntsosegments;
+
+ nsegments = scctx->isc_tx_nsegments;
+ ntsosegments = scctx->isc_tx_tso_segments_max;
+ MPASS(sctx->isc_ntxd > 0);
+ MPASS(nsegments > 0);
+ MPASS(ntsosegments > 0);
+ /*
+ * Setup DMA descriptor areas.
+ */
+ if ((err = bus_dma_tag_create(bus_get_dma_tag(dev),
+ 1, 0, /* alignment, bounds */
+ BUS_SPACE_MAXADDR, /* lowaddr */
+ BUS_SPACE_MAXADDR, /* highaddr */
+ NULL, NULL, /* filter, filterarg */
+ sctx->isc_tx_maxsize, /* maxsize */
+ nsegments, /* nsegments */
+ sctx->isc_tx_maxsegsize, /* maxsegsize */
+ 0, /* flags */
+ NULL, /* lockfunc */
+ NULL, /* lockfuncarg */
+ &txq->ift_desc_tag))) {
+ device_printf(dev,"Unable to allocate TX DMA tag: %d\n", err);
+ device_printf(dev,"maxsize: %ld nsegments: %d maxsegsize: %ld\n",
+ sctx->isc_tx_maxsize, nsegments, sctx->isc_tx_maxsegsize);
+ goto fail;
+ }
+#ifdef INVARIANTS
+ device_printf(dev,"maxsize: %ld nsegments: %d maxsegsize: %ld\n",
+ sctx->isc_tx_maxsize, nsegments, sctx->isc_tx_maxsegsize);
+#endif
+ if ((err = bus_dma_tag_create(bus_get_dma_tag(dev),
+ 1, 0, /* alignment, bounds */
+ BUS_SPACE_MAXADDR, /* lowaddr */
+ BUS_SPACE_MAXADDR, /* highaddr */
+ NULL, NULL, /* filter, filterarg */
+ scctx->isc_tx_tso_size_max, /* maxsize */
+ ntsosegments, /* nsegments */
+ scctx->isc_tx_tso_segsize_max, /* maxsegsize */
+ 0, /* flags */
+ NULL, /* lockfunc */
+ NULL, /* lockfuncarg */
+ &txq->ift_tso_desc_tag))) {
+ device_printf(dev,"Unable to allocate TX TSO DMA tag: %d\n", err);
+ device_printf(dev,"TSO maxsize: %d ntsosegments: %d maxsegsize: %d\n",
+ scctx->isc_tx_tso_size_max, ntsosegments,
+ scctx->isc_tx_tso_segsize_max);
+ goto fail;
+ }
+#ifdef INVARIANTS
+ device_printf(dev,"TSO maxsize: %d ntsosegments: %d maxsegsize: %d\n",
+ scctx->isc_tx_tso_size_max, ntsosegments,
+ scctx->isc_tx_tso_segsize_max);
+#endif
+ if (!(txq->ift_sds =
+ (iflib_sd_t) malloc(sizeof(struct iflib_sw_desc) *
+ sctx->isc_ntxd, M_IFLIB, M_NOWAIT | M_ZERO))) {
+ device_printf(dev, "Unable to allocate tx_buffer memory\n");
+ err = ENOMEM;
+ goto fail;
+ }
+
+ /* Create the descriptor buffer dma maps */
+ txsd = txq->ift_sds;
+ for (i = 0; i < sctx->isc_ntxd; i++, txsd++) {
+ err = bus_dmamap_create(txq->ift_desc_tag, 0, &txsd->ifsd_map);
+ if (err != 0) {
+ device_printf(dev, "Unable to create 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);
+}
+
+/*
+ * XXX Review tx cleaning and buffer mapping
+ *
+ */
+
+static void
+iflib_txsd_destroy(if_ctx_t ctx, iflib_txq_t txq, iflib_sd_t txsd)
+{
+ if (txsd->ifsd_m != NULL) {
+ if (txsd->ifsd_map != NULL) {
+ bus_dmamap_destroy(txq->ift_desc_tag, txsd->ifsd_map);
+ txsd->ifsd_map = NULL;
+ }
+ } else if (txsd->ifsd_map != NULL) {
+ bus_dmamap_unload(txq->ift_desc_tag,
+ txsd->ifsd_map);
+ bus_dmamap_destroy(txq->ift_desc_tag,
+ txsd->ifsd_map);
+ txsd->ifsd_map = NULL;
+ }
+}
+
+static void
+iflib_txq_destroy(iflib_txq_t txq)
+{
+ if_ctx_t ctx = txq->ift_ctx;
+ if_shared_ctx_t sctx = ctx->ifc_sctx;
+ iflib_sd_t sd = txq->ift_sds;
+
+ for (int i = 0; i < sctx->isc_ntxd; i++, sd++)
+ iflib_txsd_destroy(ctx, txq, sd);
+ if (txq->ift_sds != NULL) {
+ free(txq->ift_sds, M_IFLIB);
+ txq->ift_sds = NULL;
+ }
+ if (txq->ift_desc_tag != NULL) {
+ bus_dma_tag_destroy(txq->ift_desc_tag);
+ txq->ift_desc_tag = NULL;
+ }
+}
+
+static void
+iflib_txsd_free(if_ctx_t ctx, iflib_txq_t txq, iflib_sd_t txsd)
+{
+ if (txsd->ifsd_m == NULL)
+ return;
+ bus_dmamap_sync(txq->ift_desc_tag,
+ txsd->ifsd_map,
+ BUS_DMASYNC_POSTWRITE);
+ bus_dmamap_unload(txq->ift_desc_tag,
+ txsd->ifsd_map);
+ m_freem(txsd->ifsd_m);
+ DBG_COUNTER_INC(tx_frees);
+ txsd->ifsd_m = NULL;
+}
+
+static int
+iflib_txq_setup(iflib_txq_t txq)
+{
+ if_ctx_t ctx = txq->ift_ctx;
+ if_shared_ctx_t sctx = ctx->ifc_sctx;
+ iflib_qset_t qset = &ctx->ifc_qsets[txq->ift_id];
+ iflib_dma_info_t di;
+ int i;
+
+ /* Set number of descriptors available */
+ txq->ift_qstatus = IFLIB_QUEUE_IDLE;
+
+ /* Reset indices */
+ txq->ift_cidx_processed = txq->ift_pidx = txq->ift_cidx = txq->ift_npending = 0;
+ txq->ift_size = sctx->isc_ntxd;
+
+ for (i = 0, di = qset->ifq_ifdi; i < qset->ifq_nhwqs; i++, di++)
+ bzero((void *)di->idi_vaddr, di->idi_size);
+
+ IFDI_TXQ_SETUP(ctx, txq->ift_id);
+ for (i = 0, di = qset->ifq_ifdi; i < qset->ifq_nhwqs; i++, di++)
+ bus_dmamap_sync(di->idi_tag, di->idi_map,
+ BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);
+ return (0);
+}
+
+/*********************************************************************
+ *
+ * Allocate memory for rx_buffer structures. Since we use one
+ * rx_buffer per received packet, the maximum number of rx_buffer's
+ * that we'll need is equal to the number of receive descriptors
+ * that we've allocated.
+ *
+ **********************************************************************/
+static int
+iflib_rxsd_alloc(iflib_rxq_t rxq)
+{
+ if_ctx_t ctx = rxq->ifr_ctx;
+ if_shared_ctx_t sctx = ctx->ifc_sctx;
+ device_t dev = ctx->ifc_dev;
+ iflib_fl_t fl;
+ iflib_sd_t rxsd;
+ int err;
+
+ MPASS(sctx->isc_nrxd > 0);
+
+ fl = rxq->ifr_fl;
+ for (int i = 0; i < rxq->ifr_nfl; i++, fl++) {
+ fl->ifl_sds = malloc(sizeof(struct iflib_sw_desc) *
+ sctx->isc_nrxd, M_IFLIB, M_WAITOK | M_ZERO);
+ if (fl->ifl_sds == NULL) {
+ device_printf(dev, "Unable to allocate rx sw desc memory\n");
+ return (ENOMEM);
+ }
+ fl->ifl_size = sctx->isc_nrxd; /* this isn't necessarily the same */
+ err = bus_dma_tag_create(bus_get_dma_tag(dev), /* parent */
+ 1, 0, /* alignment, bounds */
+ BUS_SPACE_MAXADDR, /* lowaddr */
+ BUS_SPACE_MAXADDR, /* highaddr */
+ NULL, NULL, /* filter, filterarg */
+ sctx->isc_rx_maxsize, /* maxsize */
+ sctx->isc_rx_nsegments, /* nsegments */
+ sctx->isc_rx_maxsegsize, /* maxsegsize */
+ 0, /* flags */
+ NULL, /* lockfunc */
+ NULL, /* lockarg */
+ &fl->ifl_desc_tag);
+ if (err) {
+ device_printf(dev, "%s: bus_dma_tag_create failed %d\n",
+ __func__, err);
+ goto fail;
+ }
+
+ rxsd = fl->ifl_sds;
+ for (int i = 0; i < sctx->isc_nrxd; i++, rxsd++) {
+ err = bus_dmamap_create(fl->ifl_desc_tag, 0, &rxsd->ifsd_map);
+ if (err) {
+ device_printf(dev, "%s: bus_dmamap_create failed: %d\n",
+ __func__, err);
+ 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;
+}
+
+
+/**
+ * rxq_refill - refill an rxq free-buffer list
+ * @ctx: the iflib context
+ * @rxq: the free-list to refill
+ * @n: the number of new buffers to allocate
+ *
+ * (Re)populate an rxq free-buffer list with up to @n new packet buffers.
+ * The caller must assure that @n does not exceed the queue's capacity.
+ */
+static void
+_iflib_fl_refill(if_ctx_t ctx, iflib_fl_t fl, int count)
+{
+ struct mbuf *m;
+ int pidx = fl->ifl_pidx;
+ iflib_sd_t rxsd = &fl->ifl_sds[pidx];
+ caddr_t cl;
+ int n, i = 0;
+ uint64_t bus_addr;
+ int err;
+
+ n = count;
+ MPASS(n > 0);
+ MPASS(fl->ifl_credits >= 0);
+ MPASS(fl->ifl_credits + n <= fl->ifl_size);
+
+ if (pidx < fl->ifl_cidx)
+ MPASS(pidx + n <= fl->ifl_cidx);
+ if (pidx == fl->ifl_cidx && (fl->ifl_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);
+
+ while (n--) {
+ /*
+ * We allocate an uninitialized mbuf + cluster, mbuf is
+ * initialized after rx.
+ *
+ * If the cluster is still set then we know a minimum sized packet was received
+ */
+ if ((cl = rxsd->ifsd_cl) == NULL &&
+ (cl = rxsd->ifsd_cl = m_cljget(NULL, M_NOWAIT, fl->ifl_buf_size)) == NULL)
+ break;
+ if ((m = m_gethdr(M_NOWAIT, MT_NOINIT)) == NULL) {
+ break;
+ }
+ DBG_COUNTER_INC(rx_allocs);
+#ifdef notyet
+ if ((rxsd->ifsd_flags & RX_SW_DESC_MAP_CREATED) == 0) {
+ int err;
+
+ if ((err = bus_dmamap_create(fl->ifl_ifdi->idi_tag, 0, &rxsd->ifsd_map))) {
+ log(LOG_WARNING, "bus_dmamap_create failed %d\n", err);
+ uma_zfree(fl->ifl_zone, cl);
+ n = 0;
+ goto done;
+ }
+ rxsd->ifsd_flags |= RX_SW_DESC_MAP_CREATED;
+ }
+#endif
+#if defined(__i386__) || defined(__amd64__)
+ if (__predict_true(!(ctx->ifc_flags & IFC_DMAR))) {
+ bus_addr = pmap_kextract((vm_offset_t)cl);
+ } else
+#endif
+ {
+ struct rxq_refill_cb_arg cb_arg;
+ iflib_rxq_t q;
+
+ cb_arg.error = 0;
+ q = fl->ifl_rxq;
+ err = bus_dmamap_load(fl->ifl_desc_tag, rxsd->ifsd_map,
+ cl, fl->ifl_buf_size, _rxq_refill_cb, &cb_arg, 0);
+
+ if (err != 0 || cb_arg.error) {
+ /*
+ * !zone_pack ?
+ */
+ if (fl->ifl_zone == zone_pack)
+ uma_zfree(fl->ifl_zone, cl);
+ m_free(m);
+ n = 0;
+ goto done;
+ }
+ bus_addr = cb_arg.seg.ds_addr;
+ }
+ rxsd->ifsd_flags |= RX_SW_DESC_INUSE;
+
+ MPASS(rxsd->ifsd_m == NULL);
+ rxsd->ifsd_cl = cl;
+ rxsd->ifsd_m = m;
+ fl->ifl_bus_addrs[i] = bus_addr;
+ fl->ifl_vm_addrs[i] = cl;
+ rxsd++;
+ fl->ifl_credits++;
+ i++;
+ MPASS(fl->ifl_credits <= fl->ifl_size);
+ if (++fl->ifl_pidx == fl->ifl_size) {
+ fl->ifl_pidx = 0;
+ fl->ifl_gen = 1;
+ rxsd = fl->ifl_sds;
+ }
+ if (n == 0 || i == 256) {
+ ctx->isc_rxd_refill(ctx->ifc_softc, fl->ifl_rxq->ifr_id, fl->ifl_id, pidx,
+ fl->ifl_bus_addrs, fl->ifl_vm_addrs, i);
+ i = 0;
+ pidx = fl->ifl_pidx;
+ }
+ }
+done:
+ DBG_COUNTER_INC(rxd_flush);
+ if (fl->ifl_pidx == 0)
+ pidx = fl->ifl_size - 1;
+ else
+ pidx = fl->ifl_pidx - 1;
+ ctx->isc_rxd_flush(ctx->ifc_softc, fl->ifl_rxq->ifr_id, fl->ifl_id, pidx);
+}
+
+static __inline void
+__iflib_fl_refill_lt(if_ctx_t ctx, iflib_fl_t fl, int max)
+{
+ /* we avoid allowing pidx to catch up with cidx as it confuses ixl */
+ int32_t reclaimable = fl->ifl_size - fl->ifl_credits - 1;
+#ifdef INVARIANTS
+ int32_t delta = fl->ifl_size - get_inuse(fl->ifl_size, fl->ifl_cidx, fl->ifl_pidx, fl->ifl_gen) - 1;
+#endif
+
+ MPASS(fl->ifl_credits <= fl->ifl_size);
+ MPASS(reclaimable == delta);
+
+ if (reclaimable > 0)
+ _iflib_fl_refill(ctx, fl, min(max, reclaimable));
+}
+
+static void
+iflib_fl_bufs_free(iflib_fl_t fl)
+{
+ uint32_t cidx = fl->ifl_cidx;
+ iflib_dma_info_t idi = fl->ifl_ifdi;
+
+ MPASS(fl->ifl_credits >= 0);
+ while (fl->ifl_credits) {
+ iflib_sd_t d = &fl->ifl_sds[cidx];
+
+ if (d->ifsd_flags & RX_SW_DESC_INUSE) {
+ bus_dmamap_unload(fl->ifl_desc_tag, d->ifsd_map);
+ bus_dmamap_destroy(fl->ifl_desc_tag, d->ifsd_map);
+ if (d->ifsd_m != NULL) {
+ m_init(d->ifsd_m, M_NOWAIT, MT_DATA, 0);
+ uma_zfree(zone_mbuf, d->ifsd_m);
+ }
+ if (d->ifsd_cl != NULL)
+ uma_zfree(fl->ifl_zone, d->ifsd_cl);
+ } else {
+ MPASS(d->ifsd_cl == NULL);
+ MPASS(d->ifsd_m == NULL);
+ }
+ d->ifsd_cl = NULL;
+ d->ifsd_m = NULL;
+ if (++cidx == fl->ifl_size)
+ cidx = 0;
+ fl->ifl_credits--;
+ }
+ /*
+ * Reset free list values
+ */
+ fl->ifl_cidx = fl->ifl_pidx = fl->ifl_gen = 0;;
+ bzero(idi->idi_vaddr, idi->idi_size);
+}
+
+/*********************************************************************
+ *
+ * Initialize a receive ring and its buffers.
+ *
+ **********************************************************************/
+static int
+iflib_fl_setup(iflib_fl_t fl)
+{
+ iflib_rxq_t rxq = fl->ifl_rxq;
+ if_ctx_t ctx = rxq->ifr_ctx;
+ if_softc_ctx_t sctx = &ctx->ifc_softc_ctx;
+
+ /*
+ * XXX don't set the max_frame_size to larger
+ * than the hardware can handle
+ */
+ if (sctx->isc_max_frame_size <= 2048)
+ fl->ifl_buf_size = MCLBYTES;
+ else if (sctx->isc_max_frame_size <= 4096)
+ fl->ifl_buf_size = MJUMPAGESIZE;
+ else if (sctx->isc_max_frame_size <= 9216)
+ fl->ifl_buf_size = MJUM9BYTES;
+ else
+ fl->ifl_buf_size = MJUM16BYTES;
+ 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);
+
+ /*
+ ** Free current RX buffer structs and their mbufs
+ */
+ iflib_fl_bufs_free(fl);
+
+ /* Now replenish the mbufs */
+ MPASS(fl->ifl_credits == 0);
+ /* avoid pre-allocating zillions of clusters to an idle card
+ * potentially speeding up attach
+ */
+ _iflib_fl_refill(ctx, fl, min(128, fl->ifl_size));
+ MPASS(min(128, fl->ifl_size) == fl->ifl_credits);
+ if (min(128, fl->ifl_size) != fl->ifl_credits)
+ return (ENOBUFS);
+ /*
+ * handle failure
+ */
+ MPASS(rxq != NULL);
+ MPASS(fl->ifl_ifdi != NULL);
+ bus_dmamap_sync(fl->ifl_ifdi->idi_tag, fl->ifl_ifdi->idi_map,
+ BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);
+ return (0);
+}
+
+/*********************************************************************
+ *
+ * Free receive ring data structures
+ *
+ **********************************************************************/
+static void
+iflib_rx_sds_free(iflib_rxq_t rxq)
+{
+ iflib_fl_t fl;
+ int i;
+
+ if (rxq->ifr_fl != NULL) {
+ for (i = 0; i < rxq->ifr_nfl; i++) {
+ fl = &rxq->ifr_fl[i];
+ if (fl->ifl_desc_tag != NULL) {
+ bus_dma_tag_destroy(fl->ifl_desc_tag);
+ fl->ifl_desc_tag = NULL;
+ }
+ }
+ if (rxq->ifr_fl->ifl_sds != NULL)
+ free(rxq->ifr_fl->ifl_sds, M_IFLIB);
+
+ free(rxq->ifr_fl, M_IFLIB);
+ rxq->ifr_fl = NULL;
+ rxq->ifr_gen = rxq->ifr_cidx = rxq->ifr_pidx = 0;
+ }
+}
+
+/*
+ * MI independent logic
+ *
+ */
+static void
+iflib_timer(void *arg)
+{
+ iflib_txq_t txq = arg;
+ if_ctx_t ctx = txq->ift_ctx;
+ if_softc_ctx_t scctx = &ctx->ifc_softc_ctx;
+
+ if (!(if_getdrvflags(ctx->ifc_ifp) & IFF_DRV_RUNNING))
+ return;
+ /*
+ ** Check on the state of the TX queue(s), this
+ ** can be done without the lock because its RO
+ ** and the HUNG state will be static if set.
+ */
+ IFDI_TIMER(ctx, txq->ift_id);
+ if ((txq->ift_qstatus == IFLIB_QUEUE_HUNG) &&
+ (ctx->ifc_pause_frames == 0))
+ goto hung;
+
+ if (TXQ_AVAIL(txq) <= 2*scctx->isc_tx_nsegments ||
+ ifmp_ring_is_stalled(txq->ift_br[0]))
+ GROUPTASK_ENQUEUE(&txq->ift_task);
+
+ ctx->ifc_pause_frames = 0;
+ if (if_getdrvflags(ctx->ifc_ifp) & IFF_DRV_RUNNING)
+ callout_reset_on(&txq->ift_timer, hz/2, iflib_timer, txq, txq->ift_timer.c_cpu);
+ return;
+hung:
+ CTX_LOCK(ctx);
+ if_setdrvflagbits(ctx->ifc_ifp, 0, IFF_DRV_RUNNING);
+ device_printf(ctx->ifc_dev, "TX(%d) desc avail = %d, pidx = %d\n",
+ txq->ift_id, TXQ_AVAIL(txq), txq->ift_pidx);
+
+ IFDI_WATCHDOG_RESET(ctx);
+ ctx->ifc_watchdog_events++;
+ ctx->ifc_pause_frames = 0;
+
+ iflib_init_locked(ctx);
+ CTX_UNLOCK(ctx);
+}
+
+static void
+iflib_init_locked(if_ctx_t ctx)
+{
+ if_softc_ctx_t sctx = &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;
+
+
+ if_setdrvflagbits(ifp, IFF_DRV_OACTIVE, IFF_DRV_RUNNING);
+ IFDI_INTR_DISABLE(ctx);
+
+ /* Set hardware offload abilities */
+ if_clearhwassist(ifp);
+ if (if_getcapenable(ifp) & IFCAP_TXCSUM)
+ if_sethwassistbits(ifp, CSUM_IP | CSUM_TCP | CSUM_UDP, 0);
+ if (if_getcapenable(ifp) & IFCAP_TXCSUM_IPV6)
+ if_sethwassistbits(ifp, (CSUM_TCP_IPV6 | CSUM_UDP_IPV6), 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, rxq = ctx->ifc_rxqs; i < sctx->isc_nqsets; i++, txq++, rxq++) {
+ CALLOUT_LOCK(txq);
+ callout_stop(&txq->ift_timer);
+ callout_stop(&txq->ift_db_check);
+ CALLOUT_UNLOCK(txq);
+ iflib_netmap_txq_init(ctx, txq);
+ iflib_netmap_rxq_init(ctx, rxq);
+ }
+
+ IFDI_INIT(ctx);
+ for (i = 0, rxq = ctx->ifc_rxqs; i < sctx->isc_nqsets; i++, rxq++) {
+ for (j = 0, fl = rxq->ifr_fl; j < rxq->ifr_nfl; j++, fl++) {
+ if (iflib_fl_setup(fl)) {
+ device_printf(ctx->ifc_dev, "freelist setup failed - check cluster settings\n");
+ goto done;
+ }
+ }
+ }
+ done:
+ if_setdrvflagbits(ctx->ifc_ifp, IFF_DRV_RUNNING, IFF_DRV_OACTIVE);
+ IFDI_INTR_ENABLE(ctx);
+ txq = ctx->ifc_txqs;
+ for (i = 0; i < sctx->isc_nqsets; i++, txq++)
+ callout_reset_on(&txq->ift_timer, hz/2, iflib_timer, txq,
+ txq->ift_timer.c_cpu);
+}
+
+static int
+iflib_media_change(if_t ifp)
+{
+ if_ctx_t ctx = if_getsoftc(ifp);
+ int err;
+
+ CTX_LOCK(ctx);
+ if ((err = IFDI_MEDIA_CHANGE(ctx)) == 0)
+ iflib_init_locked(ctx);
+ CTX_UNLOCK(ctx);
+ return (err);
+}
+
+static void
+iflib_media_status(if_t ifp, struct ifmediareq *ifmr)
+{
+ if_ctx_t ctx = if_getsoftc(ifp);
+
+ CTX_LOCK(ctx);
+ IFDI_UPDATE_ADMIN_STATUS(ctx);
+ IFDI_MEDIA_STATUS(ctx, ifmr);
+ CTX_UNLOCK(ctx);
+}
+
+static void
+iflib_stop(if_ctx_t ctx)
+{
+ iflib_txq_t txq = ctx->ifc_txqs;
+ iflib_rxq_t rxq = ctx->ifc_rxqs;
+ if_softc_ctx_t scctx = &ctx->ifc_softc_ctx;
+ if_shared_ctx_t sctx = ctx->ifc_sctx;
+ iflib_qset_t qset;
+ iflib_dma_info_t di;
+ iflib_sd_t txsd;
+ 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);
+
+ /* Wait for current tx queue users to exit to disarm watchdog timer. */
+ for (i = 0; i < scctx->isc_nqsets; i++, txq++, rxq++) {
+ /* make sure all transmitters have completed before proceeding XXX */
+
+ /* clean any enqueued buffers */
+ iflib_txq_check_drain(txq, 0);
+ txsd = txq->ift_sds;
+ /* Free any existing tx buffers. */
+ for (j = 0; j < sctx->isc_ntxd; j++, txsd++) {
+ iflib_txsd_free(ctx, txq, txsd);
+ }
+ txq->ift_processed = txq->ift_cleaned = txq->ift_cidx_processed = 0;
+ txq->ift_in_use = txq->ift_cidx = txq->ift_pidx = txq->ift_no_desc_avail = 0;
+ txq->ift_closed = txq->ift_mbuf_defrag = txq->ift_mbuf_defrag_failed = 0;
+ txq->ift_no_tx_dma_setup = txq->ift_txd_encap_efbig = txq->ift_map_failed = 0;
+ ifmp_ring_reset_stats(txq->ift_br[0]);
+ qset = &ctx->ifc_qsets[txq->ift_id];
+ for (j = 0, di = qset->ifq_ifdi; j < qset->ifq_nhwqs; 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);
+ }
+ IFDI_STOP(ctx);
+}
+
+static iflib_sd_t
+rxd_frag_to_sd(iflib_rxq_t rxq, if_rxd_frag_t irf, int *cltype, int unload)
+{
+ int flid, cidx;
+ iflib_sd_t sd;
+ iflib_fl_t fl;
+ iflib_dma_info_t di;
+
+ flid = irf->irf_flid;
+ cidx = irf->irf_idx;
+ fl = &rxq->ifr_fl[flid];
+ fl->ifl_credits--;
+
+ sd = &fl->ifl_sds[cidx];
+ di = fl->ifl_ifdi;
+ bus_dmamap_sync(di->idi_tag, di->idi_map,
+ BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE);
+
+ /* not valid assert if bxe really does SGE from non-contiguous elements */
+ MPASS(fl->ifl_cidx == cidx);
+ if (unload)
+ bus_dmamap_unload(fl->ifl_desc_tag, sd->ifsd_map);
+
+ if (__predict_false(++fl->ifl_cidx == fl->ifl_size)) {
+ fl->ifl_cidx = 0;
+ fl->ifl_gen = 0;
+ }
+ /* YES ick */
+ if (cltype)
+ *cltype = fl->ifl_cltype;
+ return (sd);
+}
+
+static struct mbuf *
+assemble_segments(iflib_rxq_t rxq, if_rxd_info_t ri)
+{
+ int i, padlen , flags, cltype;
+ struct mbuf *m, *mh, *mt;
+ iflib_sd_t sd;
+ caddr_t cl;
+
+ i = 0;
+ do {
+ sd = rxd_frag_to_sd(rxq, &ri->iri_frags[0], &cltype, TRUE);
+
+ MPASS(sd->ifsd_cl != NULL);
+ MPASS(sd->ifsd_m != NULL);
+ m = sd->ifsd_m;
+ if (i == 0) {
+ 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;
+ }
+ sd->ifsd_m = NULL;
+ 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, cltype);
+ /*
+ * These must follow m_init and m_cljset
+ */
+ m->m_data += padlen;
+ ri->iri_len -= padlen;
+ m->m_len = ri->iri_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 mbuf *m;
+ iflib_sd_t sd;
+
+ /* should I merge this back in now that the two paths are basically duplicated? */
+ if (ri->iri_len <= IFLIB_RX_COPY_THRESH) {
+ sd = rxd_frag_to_sd(rxq, &ri->iri_frags[0], NULL, FALSE);
+ m = sd->ifsd_m;
+ sd->ifsd_m = NULL;
+ m_init(m, M_NOWAIT, MT_DATA, M_PKTHDR);
+ memcpy(m->m_data, sd->ifsd_cl, ri->iri_len);
+ m->m_len = ri->iri_len;
+ } else {
+ m = assemble_segments(rxq, ri);
+ }
+ 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);
+}
+
+static bool
+iflib_rxeof(iflib_rxq_t rxq, int budget)
+{
+ if_ctx_t ctx = rxq->ifr_ctx;
+ if_shared_ctx_t sctx = ctx->ifc_sctx;
+ int avail, i, *cidxp;
+ struct if_rxd_info ri;
+ int err, budget_left, rx_bytes, rx_pkts;
+ iflib_fl_t fl;
+ struct ifnet *ifp;
+ struct lro_entry *queued;
+ /*
+ * XXX early demux data packets so that if_input processing only handles
+ * acks in interrupt context
+ */
+ struct mbuf *m, *mh, *mt;
+
+ if (netmap_rx_irq(ctx->ifc_ifp, rxq->ifr_id, &budget)) {
+ return (FALSE);
+ }
+
+ mh = mt = NULL;
+ MPASS(budget > 0);
+ rx_pkts = rx_bytes = 0;
+ if (sctx->isc_flags & IFLIB_HAS_CQ)
+ cidxp = &rxq->ifr_cidx;
+ else
+ cidxp = &rxq->ifr_fl[0].ifl_cidx;
+ if ((avail = iflib_rxd_avail(ctx, rxq, *cidxp)) == 0) {
+ for (i = 0, fl = &rxq->ifr_fl[0]; i < sctx->isc_nfl; i++, fl++)
+ __iflib_fl_refill_lt(ctx, fl, budget + 8);
+ DBG_COUNTER_INC(rx_unavail);
+ return (false);
+ }
+
+ for (budget_left = budget; (budget_left > 0) && (avail > 0); budget_left--, avail--) {
+ if (__predict_false(!CTX_ACTIVE(ctx))) {
+ DBG_COUNTER_INC(rx_ctx_inactive);
+ break;
+ }
+ /*
+ * Reset client set fields to their default values
+ */
+ bzero(&ri, sizeof(ri));
+ ri.iri_qsidx = rxq->ifr_id;
+ ri.iri_cidx = *cidxp;
+ ri.iri_ifp = ctx->ifc_ifp;
+ ri.iri_frags = rxq->ifr_frags;
+ err = ctx->isc_rxd_pkt_get(ctx->ifc_softc, &ri);
+
+ /* in lieu of handling correctly - make sure it isn't being unhandled */
+ MPASS(err == 0);
+ if (sctx->isc_flags & IFLIB_HAS_CQ) {
+ /* we know we consumed _one_ CQ entry */
+ if (++rxq->ifr_cidx == sctx->isc_nrxd) {
+ rxq->ifr_cidx = 0;
+ rxq->ifr_gen = 0;
+ }
+ /* was this only a completion queue message? */
+ if (__predict_false(ri.iri_nfrags == 0))
+ continue;
+ }
+ MPASS(ri.iri_nfrags != 0);
+ MPASS(ri.iri_len != 0);
+ m = iflib_rxd_pkt_get(rxq, &ri);
+
+ if (avail == 0 && budget_left)
+ avail = iflib_rxd_avail(ctx, rxq, *cidxp);
+
+ if (__predict_false(m == NULL)) {
+ DBG_COUNTER_INC(rx_mbuf_null);
+ continue;
+ }
+ /* imm_pkt: -- cxgb */
+ if (mh == NULL)
+ mh = mt = m;
+ else {
+ mt->m_nextpkt = m;
+ mt = m;
+ }
+ }
+ /* make sure that we can refill faster than drain */
+ for (i = 0, fl = &rxq->ifr_fl[0]; i < sctx->isc_nfl; i++, fl++)
+ __iflib_fl_refill_lt(ctx, fl, budget + 8);
+
+ ifp = ctx->ifc_ifp;
+ while (mh != NULL) {
+ m = mh;
+ mh = mh->m_nextpkt;
+ m->m_nextpkt = NULL;
+ rx_bytes += m->m_pkthdr.len;
+ rx_pkts++;
+ if (rxq->ifr_lc.lro_cnt != 0 &&
+ tcp_lro_rx(&rxq->ifr_lc, m, 0) == 0)
+ continue;
+ DBG_COUNTER_INC(rx_if_input);
+ ifp->if_input(ifp, m);
+ }
+ if_inc_counter(ifp, IFCOUNTER_IBYTES, rx_bytes);
+ if_inc_counter(ifp, IFCOUNTER_IPACKETS, rx_pkts);
+
+ /*
+ * Flush any outstanding LRO work
+ */
+ while ((queued = SLIST_FIRST(&rxq->ifr_lc.lro_active)) != NULL) {
+ SLIST_REMOVE_HEAD(&rxq->ifr_lc.lro_active, next);
+ tcp_lro_flush(&rxq->ifr_lc, queued);
+ }
+ return (iflib_rxd_avail(ctx, rxq, *cidxp));
+}
+
+#define M_CSUM_FLAGS(m) ((m)->m_pkthdr.csum_flags)
+#define M_HAS_VLANTAG(m) (m->m_flags & M_VLANTAG)
+
+static __inline void
+iflib_txd_db_check(if_ctx_t ctx, iflib_txq_t txq, int ring)
+{
+ uint32_t dbval;
+
+ if (ring || ++txq->ift_db_pending >= TX_BATCH_SIZE) {
+
+ /* the lock will only ever be contended in the !min_latency case */
+ if (!TXDB_TRYLOCK(txq))
+ return;
+ dbval = txq->ift_npending ? txq->ift_npending : txq->ift_pidx;
+ ctx->isc_txd_flush(ctx->ifc_softc, txq->ift_id, dbval);
+ txq->ift_db_pending = txq->ift_npending = 0;
+ TXDB_UNLOCK(txq);
+ }
+}
+
+static void
+iflib_txd_deferred_db_check(void * arg)
+{
+ iflib_txq_t txq = arg;
+
+ /* simple non-zero boolean so use bitwise OR */
+ if (txq->ift_db_pending | txq->ift_npending)
+ iflib_txd_db_check(txq->ift_ctx, txq, TRUE);
+
+ if (ifmp_ring_is_stalled(txq->ift_br[0]))
+ iflib_txq_check_drain(txq, 4);
+}
+
+#ifdef PKT_DEBUG
+static void
+print_pkt(if_pkt_info_t pi)
+{
+ printf("pi len: %d qsidx: %d nsegs: %d ndescs: %d flags: %x pidx: %d\n",
+ pi->ipi_len, pi->ipi_qsidx, pi->ipi_nsegs, pi->ipi_ndescs, pi->ipi_flags, pi->ipi_pidx);
+ printf("pi new_pidx: %d csum_flags: %lx tso_segsz: %d mflags: %x vtag: %d\n",
+ pi->ipi_new_pidx, pi->ipi_csum_flags, pi->ipi_tso_segsz, pi->ipi_mflags, pi->ipi_vtag);
+ printf("pi etype: %d ehdrlen: %d ip_hlen: %d ipproto: %d\n",
+ pi->ipi_etype, pi->ipi_ehdrlen, pi->ipi_ip_hlen, pi->ipi_ipproto);
+}
+#endif
+
+#define IS_TSO4(pi) ((pi)->ipi_csum_flags & CSUM_IP_TSO)
+#define IS_TSO6(pi) ((pi)->ipi_csum_flags & CSUM_IP6_TSO)
+
+static int
+iflib_parse_header(if_pkt_info_t pi, struct mbuf *m)
+{
+ struct ether_vlan_header *eh;
+
+ /*
+ * Determine where frame payload starts.
+ * Jump over vlan headers if already present,
+ * helpful for QinQ too.
+ */
+ eh = mtod(m, struct ether_vlan_header *);
+ if (eh->evl_encap_proto == htons(ETHERTYPE_VLAN)) {
+ pi->ipi_etype = ntohs(eh->evl_proto);
+ pi->ipi_ehdrlen = ETHER_HDR_LEN + ETHER_VLAN_ENCAP_LEN;
+ } else {
+ pi->ipi_etype = ntohs(eh->evl_encap_proto);
+ pi->ipi_ehdrlen = ETHER_HDR_LEN;
+ }
+
+ switch (pi->ipi_etype) {
+#ifdef INET
+ case ETHERTYPE_IP:
+ {
+ struct ip *ip = (struct ip *)(m->m_data + pi->ipi_ehdrlen);
+ struct tcphdr *th;
+
+ MPASS(m->m_len >= pi->ipi_ehdrlen + sizeof(struct ip));
+ pi->ipi_ip_hlen = ip->ip_hl << 2;
+ pi->ipi_ipproto = ip->ip_p;
+ pi->ipi_flags |= IPI_TX_IPV4;
+
+ if (pi->ipi_csum_flags & CSUM_IP)
+ ip->ip_sum = 0;
+ th = (struct tcphdr *)((caddr_t)ip + pi->ipi_ip_hlen);
+ if (pi->ipi_ipproto == IPPROTO_TCP) {
+ 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);
+
+ MPASS(m->m_len >= pi->ipi_ehdrlen + sizeof(struct ip) + sizeof(struct tcphdr));
+ 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;
+ }
+ 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);
+
+ MPASS(m->m_len >= pi->ipi_ehdrlen + sizeof(struct ip6_hdr));
+ th = (struct tcphdr *)((caddr_t)ip6 + pi->ipi_ip_hlen);
+
+ /* XXX-BZ this will go badly in case of ext hdrs. */
+ pi->ipi_ipproto = ip6->ip6_nxt;
+ pi->ipi_flags |= IPI_TX_IPV6;
+
+ if (pi->ipi_ipproto == IPPROTO_TCP) {
+ pi->ipi_tcp_hflags = th->th_flags;
+ pi->ipi_tcp_hlen = th->th_off << 2;
+ }
+ if (IS_TSO6(pi)) {
+
+ if (__predict_false(ip6->ip6_nxt != IPPROTO_TCP))
+ return (ENXIO);
+
+ MPASS(m->m_len >= pi->ipi_ehdrlen + sizeof(struct ip6_hdr) + sizeof(struct tcphdr));
+ 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;
+ }
+ return (0);
+}
+
+static int
+iflib_encap(iflib_txq_t txq, struct mbuf **m_headp)
+{
+ if_ctx_t ctx = txq->ift_ctx;
+ if_shared_ctx_t sctx = ctx->ifc_sctx;
+ if_softc_ctx_t scctx = &ctx->ifc_softc_ctx;
+ bus_dma_segment_t *segs = txq->ift_segs;
+ struct mbuf *m_head = *m_headp;
+ int pidx = txq->ift_pidx;
+ iflib_sd_t txsd = &txq->ift_sds[pidx];
+ bus_dmamap_t map = txsd->ifsd_map;
+ struct if_pkt_info pi;
+ int remap = 0;
+ int err, nsegs, ndesc, max_segs;
+ bus_dma_tag_t desc_tag;
+
+ if (m_head->m_pkthdr.csum_flags & CSUM_TSO) {
+ desc_tag = txq->ift_tso_desc_tag;
+ max_segs = scctx->isc_tx_nsegments;
+ } else {
+ desc_tag = txq->ift_desc_tag;
+ max_segs = scctx->isc_tx_tso_segments_max;
+ }
+retry:
+ err = bus_dmamap_load_mbuf_sg(desc_tag, map,
+ *m_headp, 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);
+ if (remap == 1)
+ m_head = m_defrag(*m_headp, M_NOWAIT);
+ remap++;
+ if (__predict_false(m_head == NULL))
+ goto defrag_failed;
+ txq->ift_mbuf_defrag++;
+ *m_headp = m_head;
+ goto retry;
+ break;
+ case ENOMEM:
+ txq->ift_no_tx_dma_setup++;
+ break;
+ default:
+ txq->ift_no_tx_dma_setup++;
+ m_freem(*m_headp);
+ DBG_COUNTER_INC(tx_frees);
+ *m_headp = NULL;
+ break;
+ }
+ txq->ift_map_failed++;
+ DBG_COUNTER_INC(encap_load_mbuf_fail);
+ return (err);
+ }
+
+ /*
+ * XXX assumes a 1 to 1 relationship between segments and
+ * descriptors - this does not hold true on all drivers, e.g.
+ * cxgb
+ */
+ if (__predict_false(nsegs + 2 > TXQ_AVAIL(txq))) {
+ txq->ift_no_desc_avail++;
+ bus_dmamap_unload(desc_tag, map);
+ DBG_COUNTER_INC(encap_txq_avail_fail);
+ if (txq->ift_task.gt_task.ta_pending == 0)
+ GROUPTASK_ENQUEUE(&txq->ift_task);
+ return (ENOBUFS);
+ }
+ m_head = *m_headp;
+
+ bzero(&pi, sizeof(pi));
+ pi.ipi_len = m_head->m_pkthdr.len;
+ pi.ipi_mflags = (m_head->m_flags & (M_VLANTAG|M_BCAST|M_MCAST));
+ pi.ipi_csum_flags = m_head->m_pkthdr.csum_flags;
+ pi.ipi_vtag = (m_head->m_flags & M_VLANTAG) ? m_head->m_pkthdr.ether_vtag : 0;
+
+ /* deliberate bitwise OR to make one condition */
+ if ((pi.ipi_csum_flags | pi.ipi_vtag) &&
+ (err = iflib_parse_header(&pi, m_head)) != 0)
+ return (err);
+ pi.ipi_segs = segs;
+ pi.ipi_nsegs = nsegs;
+ pi.ipi_pidx = pidx;
+
+ pi.ipi_qsidx = txq->ift_id;
+
+ MPASS(pidx >= 0 && pidx < sctx->isc_ntxd);
+#ifdef PKT_DEBUG
+ print_pkt(&pi);
+#endif
+ if ((err = ctx->isc_txd_encap(ctx->ifc_softc, &pi)) == 0) {
+ bus_dmamap_sync(txq->ift_ifdi->idi_tag, txq->ift_ifdi->idi_map,
+ BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);
+
+ DBG_COUNTER_INC(tx_encap);
+ MPASS(txsd->ifsd_m == NULL);
+#ifdef INVARIANTS
+ {
+ int i;
+ for (i = 0; i < sctx->isc_ntxd; i++)
+ MPASS(txq->ift_sds[i].ifsd_m != m_head);
+ }
+#endif
+ txsd->ifsd_m = m_head;
+ MPASS(pi.ipi_new_pidx >= 0 && pi.ipi_new_pidx < sctx->isc_ntxd);
+
+ ndesc = pi.ipi_new_pidx - pi.ipi_pidx;
+ if (pi.ipi_new_pidx < pi.ipi_pidx) {
+ ndesc += sctx->isc_ntxd;
+ txq->ift_gen = 1;
+ }
+ MPASS(pi.ipi_new_pidx != pidx);
+ MPASS(ndesc > 0);
+ txq->ift_in_use += ndesc;
+ txq->ift_pidx = pi.ipi_new_pidx;
+ txq->ift_npending += pi.ipi_ndescs;
+ } else if (__predict_false(err == EFBIG && remap < 2)) {
+ remap = 1;
+ txq->ift_txd_encap_efbig++;
+ goto defrag;
+ } else
+ DBG_COUNTER_INC(encap_txd_encap_fail);
+ return (err);
+
+defrag_failed:
+ txq->ift_mbuf_defrag_failed++;
+ txq->ift_map_failed++;
+ m_freem(*m_headp);
+ DBG_COUNTER_INC(tx_frees);
+ *m_headp = NULL;
+ return (ENOMEM);
+}
+
+/* forward compatibility for cxgb */
+#define FIRST_QSET(ctx) 0
+
+#define NQSETS(ctx) ((ctx)->ifc_softc_ctx.isc_nqsets)
+#define QIDX(ctx, m) (((m)->m_pkthdr.flowid % NQSETS(ctx)) + FIRST_QSET(ctx))
+#define DESC_RECLAIMABLE(q) ((int)((q)->ift_processed - (q)->ift_cleaned - (q)->ift_ctx->ifc_softc_ctx.isc_tx_nsegments))
+#define RECLAIM_THRESH(ctx) ((ctx)->ifc_sctx->isc_tx_reclaim_thresh)
+#define MAX_TX_DESC(ctx) ((ctx)->ifc_softc_ctx.isc_tx_tso_segments_max)
+
+
+
+/* if there are more than TXQ_MIN_OCCUPANCY packets pending we consider deferring
+ * doorbell writes
+ */
+#define TXQ_MIN_OCCUPANCY 8
+
+static inline int
+iflib_txq_min_occupancy(iflib_txq_t txq)
+{
+
+ return (get_inuse(txq->ift_size, txq->ift_cidx, txq->ift_pidx, txq->ift_gen) < TXQ_MIN_OCCUPANCY + MAX_TX_DESC(txq->ift_ctx));
+}
+
+static void
+iflib_tx_desc_free(iflib_txq_t txq, int n)
+{
+ iflib_sd_t txsd;
+ uint32_t qsize, cidx, mask, gen;
+ struct mbuf *m;
+
+ cidx = txq->ift_cidx;
+ gen = txq->ift_gen;
+ qsize = txq->ift_ctx->ifc_sctx->isc_ntxd;
+ mask = qsize-1;
+ txsd = &txq->ift_sds[cidx];
+
+ while (n--) {
+ prefetch(txq->ift_sds[(cidx + 1) & mask].ifsd_m);
+ prefetch(txq->ift_sds[(cidx + 2) & mask].ifsd_m);
+
+ if (txsd->ifsd_m != NULL) {
+ if (txsd->ifsd_flags & TX_SW_DESC_MAPPED) {
+ /* does it matter if it's not the TSO tag? */
+ bus_dmamap_unload(txq->ift_desc_tag, txsd->ifsd_map);
+ txsd->ifsd_flags &= ~TX_SW_DESC_MAPPED;
+ }
+ while (txsd->ifsd_m) {
+ m = txsd->ifsd_m;
+ /* XXX we don't support any drivers that batch packets yet */
+ MPASS(m->m_nextpkt == NULL);
+
+ txsd->ifsd_m = m->m_nextpkt;
+ m->m_nextpkt = NULL;
+ m_freem(m);
+ DBG_COUNTER_INC(tx_frees);
+ }
+ }
+
+ ++txsd;
+ if (++cidx == qsize) {
+ cidx = 0;
+ gen = 0;
+ txsd = txq->ift_sds;
+ }
+ }
+ 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=%d cleaned=%d 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;
+
+ if (txq->ift_active == FALSE)
+ txq->ift_active = TRUE;
+
+ return (reclaim);
+}
+
+static struct mbuf **
+_ring_peek_one(struct ifmp_ring *r, int cidx, int offset)
+{
+
+ return (__DEVOLATILE(struct mbuf **, &r->items[(cidx + offset) & (r->size-1)]));
+}
+
+static void
+iflib_txq_check_drain(iflib_txq_t txq, int budget)
+{
+
+ ifmp_ring_check_drainage(txq->ift_br[0], budget);
+}
+
+static uint32_t
+iflib_txq_can_drain(struct ifmp_ring *r)
+{
+ iflib_txq_t txq = r->cookie;
+ if_ctx_t ctx = txq->ift_ctx;
+
+ return ((TXQ_AVAIL(txq) >= MAX_TX_DESC(ctx)) ||
+ ctx->isc_txd_credits_update(ctx->ifc_softc, txq->ift_id, txq->ift_cidx_processed, 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 **mp, *m;
+ int i, count, consumed, pkt_sent, bytes_sent, mcast_sent, avail, err;
+
+ avail = IDXDIFF(pidx, cidx, r->size);
+ if (__predict_false(ctx->ifc_flags & IFC_QFLUSH)) {
+ DBG_COUNTER_INC(txq_drain_flushing);
+ for (i = 0; i < avail; i++) {
+ m_freem(r->items[(cidx + i) & (r->size-1)]);
+ r->items[(cidx + i) & (r->size-1)] = NULL;
+ }
+ return (avail);
+ }
+ iflib_completed_tx_reclaim(txq, RECLAIM_THRESH(ctx));
+ 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_stop(&txq->ift_db_check);
+ CALLOUT_UNLOCK(txq);
+ DBG_COUNTER_INC(txq_drain_oactive);
+ return (0);
+ }
+ consumed = mcast_sent = bytes_sent = pkt_sent = 0;
+ count = MIN(avail, TX_BATCH_SIZE);
+
+ if (__predict_false(!(if_getdrvflags(ifp) & IFF_DRV_RUNNING) ||
+ !LINK_ACTIVE(ctx))) {
+ DBG_COUNTER_INC(txq_drain_notready);
+ goto skip_db;
+ }
+
+ for (i = 0; i < count && TXQ_AVAIL(txq) > MAX_TX_DESC(ctx) + 2; i++) {
+ mp = _ring_peek_one(r, cidx, i);
+
+ err = iflib_encap(txq, mp);
+ /*
+ * What other errors should we bail out for?
+ */
+ if (err == ENOBUFS) {
+ DBG_COUNTER_INC(txq_drain_encapfail);
+ goto done;
+ }
+ consumed++;
+ if (err)
+ continue;
+
+ pkt_sent++;
+ m = *mp;
+ DBG_COUNTER_INC(tx_sent);
+ bytes_sent += m->m_pkthdr.len;
+ if (m->m_flags & M_MCAST)
+ mcast_sent++;
+ iflib_txd_db_check(ctx, txq, 0);
+ ETHER_BPF_MTAP(ifp, m);
+ }
+ if (avail > count)
+ GROUPTASK_ENQUEUE(&txq->ift_task);
+done:
+
+ if ((iflib_min_tx_latency || iflib_txq_min_occupancy(txq)) && txq->ift_db_pending)
+ iflib_txd_db_check(ctx, txq, 1);
+ else if ((txq->ift_db_pending || TXQ_AVAIL(txq) < MAX_TX_DESC(ctx)) &&
+ (callout_pending(&txq->ift_db_check) == 0))
+ callout_reset_on(&txq->ift_db_check, 1, iflib_txd_deferred_db_check,
+ txq, txq->ift_db_check.c_cpu);
+skip_db:
+ 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);
+
+ return (consumed);
+}
+
+static void
+_task_fn_tx(void *context, int pending)
+{
+ iflib_txq_t txq = context;
+ if_ctx_t ctx = txq->ift_ctx;
+
+ if (!(if_getdrvflags(ctx->ifc_ifp) & IFF_DRV_RUNNING))
+ return;
+ ifmp_ring_check_drainage(txq->ift_br[0], IFLIB_BUDGET);
+}
+
+static void
+_task_fn_rx(void *context, int pending)
+{
+ iflib_rxq_t rxq = context;
+ if_ctx_t ctx = rxq->ifr_ctx;
+ bool more;
+
+ DBG_COUNTER_INC(task_fn_rxs);
+ if (!(if_getdrvflags(ctx->ifc_ifp) & IFF_DRV_RUNNING))
+ return;
+
+ if ((more = iflib_rxeof(rxq, 8 /* XXX */)) == false) {
+ if (ctx->ifc_flags & IFC_LEGACY)
+ IFDI_INTR_ENABLE(ctx);
+ else {
+ DBG_COUNTER_INC(rx_intr_enables);
+ IFDI_QUEUE_INTR_ENABLE(ctx, rxq->ifr_id);
+ }
+ }
+ if (!(if_getdrvflags(ctx->ifc_ifp) & IFF_DRV_RUNNING))
+ return;
+ if (more)
+ GROUPTASK_ENQUEUE(&rxq->ifr_task);
+}
+
+static void
+_task_fn_admin(void *context, int pending)
+{
+ if_ctx_t ctx = context;
+ if_softc_ctx_t sctx = &ctx->ifc_softc_ctx;
+ iflib_txq_t txq;
+ int i;
+
+ if (!(if_getdrvflags(ctx->ifc_ifp) & IFF_DRV_RUNNING))
+ return;
+
+ CTX_LOCK(ctx);
+ for (txq = ctx->ifc_txqs, i = 0; i < sctx->isc_nqsets; i++, txq++) {
+ CALLOUT_LOCK(txq);
+ callout_stop(&txq->ift_timer);
+ CALLOUT_UNLOCK(txq);
+ }
+ IFDI_UPDATE_ADMIN_STATUS(ctx);
+ for (txq = ctx->ifc_txqs, i = 0; i < sctx->isc_nqsets; i++, txq++)
+ callout_reset_on(&txq->ift_timer, hz/2, iflib_timer, txq, txq->ift_timer.c_cpu);
+ IFDI_LINK_INTR_ENABLE(ctx);
+ CTX_UNLOCK(ctx);
+
+ if (LINK_ACTIVE(ctx) == 0)
+ return;
+ for (txq = ctx->ifc_txqs, i = 0; i < sctx->isc_nqsets; i++, txq++)
+ iflib_txq_check_drain(txq, IFLIB_RESTART_BUDGET);
+}
+
+
+static void
+_task_fn_iov(void *context, int pending)
+{
+ if_ctx_t ctx = context;
+
+ if (!(if_getdrvflags(ctx->ifc_ifp) & IFF_DRV_RUNNING))
+ return;
+
+ CTX_LOCK(ctx);
+ IFDI_VFLR_HANDLE(ctx);
+ CTX_UNLOCK(ctx);
+}
+
+static int
+iflib_sysctl_int_delay(SYSCTL_HANDLER_ARGS)
+{
+ int err;
+ if_int_delay_info_t info;
+ if_ctx_t ctx;
+
+ info = (if_int_delay_info_t)arg1;
+ ctx = info->iidi_ctx;
+ info->iidi_req = req;
+ info->iidi_oidp = oidp;
+ CTX_LOCK(ctx);
+ err = IFDI_SYSCTL_INT_DELAY(ctx, info);
+ CTX_UNLOCK(ctx);
+ return (err);
+}
+
+/*********************************************************************
+ *
+ * IFNET FUNCTIONS
+ *
+ **********************************************************************/
+
+static void
+iflib_if_init(void *arg)
+{
+ if_ctx_t ctx = arg;
+
+ CTX_LOCK(ctx);
+ /* 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);
+ CTX_UNLOCK(ctx);
+
+ /* wait for any rx to return */
+ pause("iflib_init", hz/4);
+
+ CTX_LOCK(ctx);
+ iflib_stop(ctx);
+ iflib_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;
+ struct mbuf *marr[16], **mp, *next;
+ int err, i, count, qidx;
+
+ if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0 || !LINK_ACTIVE(ctx)) {
+ DBG_COUNTER_INC(tx_frees);
+ m_freem(m);
+ return (0);
+ }
+
+ qidx = 0;
+ if ((NQSETS(ctx) > 1) && M_HASHTYPE_GET(m))
+ qidx = QIDX(ctx, m);
+ /*
+ * XXX calculate buf_ring based on flowid (divvy up bits?)
+ */
+ txq = &ctx->ifc_txqs[qidx];
+
+#ifdef DRIVER_BACKPRESSURE
+ if (txq->ift_closed) {
+ while (m != NULL) {
+ next = m->m_nextpkt;
+ m->m_nextpkt = NULL;
+ m_freem(m);
+ m = next;
+ }
+ return (ENOBUFS);
+ }
+#endif
+ qidx = count = 0;
+ mp = marr;
+ next = m;
+ do {
+ count++;
+ next = next->m_nextpkt;
+ } while (next != NULL);
+
+ if (count > 16)
+ 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;
+ }
+ DBG_COUNTER_INC(tx_seen);
+ err = ifmp_ring_enqueue(txq->ift_br[0], (void **)mp, count, IFLIB_BUDGET);
+ /* drain => err = iflib_txq_transmit(ifp, txq, m); */
+ if (err) {
+ /* support forthcoming later */
+#ifdef DRIVER_BACKPRESSURE
+ txq->ift_closed = TRUE;
+#endif
+ for (i = 0; i < count; i++)
+ m_freem(mp[i]);
+ ifmp_ring_check_drainage(txq->ift_br[0], TX_BATCH_SIZE);
+ }
+ if (count > 16)
+ free(mp, M_IFLIB);
+
+ return (err);
+}
+
+static void
+iflib_if_qflush(if_t ifp)
+{
+ if_ctx_t ctx = if_getsoftc(ifp);
+ iflib_txq_t txq = ctx->ifc_txqs;
+ int i;
+
+ CTX_LOCK(ctx);
+ ctx->ifc_flags |= IFC_QFLUSH;
+ CTX_UNLOCK(ctx);
+ for (i = 0; i < NQSETS(ctx); i++, txq++)
+ while (!(ifmp_ring_is_idle(txq->ift_br[0]) || ifmp_ring_is_stalled(txq->ift_br[0])))
+ iflib_txq_check_drain(txq, 0);
+ CTX_LOCK(ctx);
+ ctx->ifc_flags &= ~IFC_QFLUSH;
+ CTX_UNLOCK(ctx);
+
+ if_qflush(ifp);
+}
+
+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;
+
+ 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))
+ iflib_if_init(ctx);
+#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);
+ /* detaching ?*/
+ if ((err = IFDI_MTU_SET(ctx, ifr->ifr_mtu)) == 0) {
+ iflib_init_locked(ctx);
+ if (ifr->ifr_mtu > ctx->ifc_max_fl_buf_size)
+ ctx->ifc_flags |= IFC_MULTISEG;
+ else
+ ctx->ifc_flags &= ~IFC_MULTISEG;
+ err = if_setmtu(ifp, ifr->ifr_mtu);
+ }
+ CTX_UNLOCK(ctx);
+ break;
+ case SIOCSIFFLAGS:
+ CTX_LOCK(ctx);
+ if (if_getflags(ifp) & IFF_UP) {
+ if (if_getdrvflags(ifp) & IFF_DRV_RUNNING) {
+ if ((if_getflags(ifp) ^ ctx->ifc_if_flags) &
+ (IFF_PROMISC | IFF_ALLMULTI)) {
+ err = IFDI_PROMISC_SET(ctx, if_getflags(ifp));
+ }
+ } else
+ iflib_init_locked(ctx);
+ } else if (if_getdrvflags(ifp) & IFF_DRV_RUNNING) {
+ iflib_stop(ctx);
+ }
+ ctx->ifc_if_flags = if_getflags(ifp);
+ CTX_UNLOCK(ctx);
+ break;
+
+ break;
+ case SIOCADDMULTI:
+ case SIOCDELMULTI:
+ if (if_getdrvflags(ifp) & IFF_DRV_RUNNING) {
+ CTX_LOCK(ctx);
+ IFDI_INTR_DISABLE(ctx);
+ IFDI_MULTI_SET(ctx);
+ IFDI_INTR_ENABLE(ctx);
+ CTX_UNLOCK(ctx);
+ }
+ break;
+ case SIOCSIFMEDIA:
+ CTX_LOCK(ctx);
+ IFDI_MEDIA_SET(ctx);
+ CTX_UNLOCK(ctx);
+ /* falls thru */
+ case SIOCGIFMEDIA:
+ err = ifmedia_ioctl(ifp, ifr, &ctx->ifc_media, command);
+ break;
+ case SIOCGI2C:
+ {
+ struct ifi2creq i2c;
+
+ err = copyin(ifr->ifr_data, &i2c, sizeof(i2c));
+ if (err != 0)
+ break;
+ if (i2c.dev_addr != 0xA0 && i2c.dev_addr != 0xA2) {
+ err = EINVAL;
+ break;
+ }
+ if (i2c.len > sizeof(i2c.data)) {
+ err = EINVAL;
+ break;
+ }
+
+ if ((err = IFDI_I2C_REQ(ctx, &i2c)) == 0)
+ err = copyout(&i2c, ifr->ifr_data, sizeof(i2c));
+ break;
+ }
+ case SIOCSIFCAP:
+ {
+ int mask, reinit;
+
+ reinit = 0;
+ mask = ifr->ifr_reqcap ^ if_getcapenable(ifp);
+
+#ifdef TCP_OFFLOAD
+ if (mask & IFCAP_TOE4) {
+ if_togglecapenable(ifp, IFCAP_TOE4);
+ reinit = 1;
+ }
+#endif
+ if (mask & IFCAP_RXCSUM)
+ if_togglecapenable(ifp, IFCAP_RXCSUM);
+ if (mask & IFCAP_RXCSUM_IPV6)
+ if_togglecapenable(ifp, IFCAP_RXCSUM_IPV6);
+ if (mask & IFCAP_HWCSUM) {
+ if_togglecapenable(ifp, IFCAP_HWCSUM);
+ reinit = 1;
+ }
+ if (mask & IFCAP_LRO)
+ if_togglecapenable(ifp, IFCAP_LRO);
+ if (mask & IFCAP_TSO4) {
+ if_togglecapenable(ifp, IFCAP_TSO4);
+ }
+ if (mask & IFCAP_TSO6) {
+ if_togglecapenable(ifp, IFCAP_TSO6);
+ }
+ if (mask & IFCAP_VLAN_HWTAGGING) {
+ if_togglecapenable(ifp, IFCAP_VLAN_HWTAGGING);
+ reinit = 1;
+ }
+ if (mask & IFCAP_VLAN_MTU) {
+ if_togglecapenable(ifp, IFCAP_VLAN_MTU);
+ reinit = 1;
+ }
+ if (mask & IFCAP_VLAN_HWFILTER) {
+ if_togglecapenable(ifp, IFCAP_VLAN_HWFILTER);
+ reinit = 1;
+ }
+ if (mask & IFCAP_VLAN_HWTSO) {
+ if_togglecapenable(ifp, IFCAP_VLAN_HWTSO);
+ reinit = 1;
+ }
+ if ((mask & IFCAP_WOL) &&
+ (if_getcapabilities(ifp) & IFCAP_WOL) != 0) {
+ if (mask & IFCAP_WOL_MCAST)
+ if_togglecapenable(ifp, IFCAP_WOL_MCAST);
+ if (mask & IFCAP_WOL_MAGIC)
+ if_togglecapenable(ifp, IFCAP_WOL_MAGIC);
+ }
+ if (reinit && (if_getdrvflags(ifp) & IFF_DRV_RUNNING)) {
+ iflib_if_init(ctx);
+ }
+ if_vlancap(ifp);
+ break;
+ }
+
+ default:
+ err = ether_ioctl(ifp, command, data);
+ break;
+ }
+
+ return (err);
+}
+
+static uint64_t
+iflib_if_get_counter(if_t ifp, ift_counter cnt)
+{
+ if_ctx_t ctx = if_getsoftc(ifp);
+
+ return (IFDI_GET_COUNTER(ctx, cnt));
+}
+
+/*********************************************************************
+ *
+ * OTHER FUNCTIONS EXPORTED TO THE STACK
+ *
+ **********************************************************************/
+
+static void
+iflib_vlan_register(void *arg, if_t ifp, uint16_t vtag)
+{
+ if_ctx_t ctx = if_getsoftc(ifp);
+
+ if ((void *)ctx != arg)
+ return;
+
+ if ((vtag == 0) || (vtag > 4095))
+ return;
+
+ CTX_LOCK(ctx);
+ IFDI_VLAN_REGISTER(ctx, vtag);
+ /* Re-init to load the changes */
+ if (if_getcapenable(ifp) & IFCAP_VLAN_HWFILTER)
+ iflib_init_locked(ctx);
+ CTX_UNLOCK(ctx);
+}
+
+static void
+iflib_vlan_unregister(void *arg, if_t ifp, uint16_t vtag)
+{
+ if_ctx_t ctx = if_getsoftc(ifp);
+
+ if ((void *)ctx != arg)
+ return;
+
+ if ((vtag == 0) || (vtag > 4095))
+ return;
+
+ CTX_LOCK(ctx);
+ IFDI_VLAN_UNREGISTER(ctx, vtag);
+ /* Re-init to load the changes */
+ if (if_getcapenable(ifp) & IFCAP_VLAN_HWFILTER)
+ iflib_init_locked(ctx);
+ CTX_UNLOCK(ctx);
+}
+
+static void
+iflib_led_func(void *arg, int onoff)
+{
+ if_ctx_t ctx = arg;
+
+ CTX_LOCK(ctx);
+ IFDI_LED_FUNC(ctx, onoff);
+ CTX_UNLOCK(ctx);
+}
+
+/*********************************************************************
+ *
+ * BUS FUNCTION DEFINITIONS
+ *
+ **********************************************************************/
+
+int
+iflib_device_probe(device_t dev)
+{
+ pci_vendor_info_t *ent;
+
+ uint16_t pci_vendor_id, pci_device_id;
+ uint16_t pci_subvendor_id, pci_subdevice_id;
+ uint16_t pci_rev_id;
+ if_shared_ctx_t sctx;
+
+ if ((sctx = DEVICE_REGISTER(dev)) == NULL || sctx->isc_magic != IFLIB_MAGIC)
+ return (ENOTSUP);
+
+ pci_vendor_id = pci_get_vendor(dev);
+ pci_device_id = pci_get_device(dev);
+ pci_subvendor_id = pci_get_subvendor(dev);
+ pci_subdevice_id = pci_get_subdevice(dev);
+ pci_rev_id = pci_get_revid(dev);
+
+ ent = sctx->isc_vendor_info;
+ while (ent->pvi_vendor_id != 0) {
+ if ((pci_vendor_id == ent->pvi_vendor_id) &&
+ (pci_device_id == ent->pvi_device_id) &&
+
+ ((pci_subvendor_id == ent->pvi_subvendor_id) ||
+ (ent->pvi_subvendor_id == 0)) &&
+
+ ((pci_subdevice_id == ent->pvi_subdevice_id) ||
+ (ent->pvi_subdevice_id == 0)) &&
+ ((pci_rev_id == ent->pvi_rev_id) ||
+ (ent->pvi_rev_id == 0))) {
+
+ device_set_desc_copy(dev, ent->pvi_name);
+ /* this needs to be changed to zero if the bus probing code
+ * ever stops re-probing on best match because the sctx
+ * may have its values over written by register calls
+ * in subsequent probes
+ */
+ return (BUS_PROBE_DEFAULT);
+ }
+ ent++;
+ }
+ return (ENXIO);
+}
+
+int
+iflib_device_register(device_t dev, void *sc, if_shared_ctx_t sctx, if_ctx_t *ctxp)
+{
+ int err, rid, msix, msix_bar;
+ if_ctx_t ctx;
+ if_t ifp;
+ if_softc_ctx_t scctx;
+
+
+ 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_sctx = sctx;
+ ctx->ifc_dev = dev;
+ ctx->ifc_txrx = *sctx->isc_txrx;
+ ctx->ifc_softc = sc;
+
+ if ((err = iflib_register(ctx)) != 0) {
+ device_printf(dev, "iflib_register failed %d\n", err);
+ return (err);
+ }
+ if ((err = IFDI_ATTACH_PRE(ctx)) != 0) {
+ device_printf(dev, "IFDI_ATTACH_PRE failed %d\n", err);
+ return (err);
+ }
+
+ if (bus_get_dma_tag(dev) != pci_get_dma_tag(dev, device_get_parent(dev)))
+ ctx->ifc_flags |= IFC_DMAR;
+ scctx = &ctx->ifc_softc_ctx;
+ msix_bar = scctx->isc_msix_bar;
+
+ if (scctx->isc_tx_nsegments > sctx->isc_ntxd / MAX_SINGLE_PACKET_FRACTION)
+ scctx->isc_tx_nsegments = max(1, sctx->isc_ntxd / MAX_SINGLE_PACKET_FRACTION);
+ if (scctx->isc_tx_tso_segments_max > sctx->isc_ntxd / MAX_SINGLE_PACKET_FRACTION)
+ scctx->isc_tx_tso_segments_max = max(1, sctx->isc_ntxd / MAX_SINGLE_PACKET_FRACTION);
+
+ ifp = ctx->ifc_ifp;
+ /* TSO parameters - dig these out of the data sheet - simply correspond to tag setup */
+ ifp->if_hw_tsomaxsegcount = scctx->isc_tx_tso_segments_max;
+ ifp->if_hw_tsomax = scctx->isc_tx_tso_size_max;
+ ifp->if_hw_tsomaxsegsize = scctx->isc_tx_tso_segsize_max;
+ /*
+ ** Now setup MSI or MSI/X, should
+ ** return us the number of supported
+ ** vectors. (Will be 1 for MSI)
+ */
+ if (sctx->isc_flags & IFLIB_SKIP_MSIX) {
+ msix = scctx->isc_vectors;
+ } else if (scctx->isc_msix_bar != 0)
+ msix = iflib_msix_init(ctx);
+ else {
+ scctx->isc_vectors = 1;
+ scctx->isc_nqsets = 1;
+ scctx->isc_intr = IFLIB_INTR_LEGACY;
+ msix = 0;
+ }
+ /* Get memory for the station queues */
+ if ((err = iflib_queues_alloc(ctx))) {
+ device_printf(dev, "Unable to allocate queue memory\n");
+ goto fail;
+ }
+
+ if ((err = iflib_qset_structures_setup(ctx))) {
+ device_printf(dev, "qset structure setup failed %d\n", err);
+ goto fail_queues;
+ }
+
+ if (msix > 1 && (err = IFDI_MSIX_INTR_ASSIGN(ctx, msix)) != 0) {
+ device_printf(dev, "IFDI_MSIX_INTR_ASSIGN failed %d\n", err);
+ goto fail_intr_free;
+ }
+ if (msix <= 1) {
+ rid = 0;
+ if (scctx->isc_intr == IFLIB_INTR_MSI) {
+ MPASS(msix == 1);
+ rid = 1;
+ }
+ if ((err = iflib_legacy_setup(ctx, ctx->isc_legacy_intr, ctx, &rid, "irq0")) != 0) {
+ device_printf(dev, "iflib_legacy_setup failed %d\n", err);
+ goto fail_intr_free;
+ }
+ }
+ ether_ifattach(ctx->ifc_ifp, ctx->ifc_mac);
+ if ((err = IFDI_ATTACH_POST(ctx)) != 0) {
+ device_printf(dev, "IFDI_ATTACH_POST failed %d\n", err);
+ goto fail_detach;
+ }
+ if ((err = iflib_netmap_attach(ctx))) {
+ device_printf(ctx->ifc_dev, "netmap attach failed: %d\n", err);
+ goto fail_detach;
+ }
+ *ctxp = ctx;
+
+ iflib_add_device_sysctl(ctx);
+ return (0);
+fail_detach:
+ ether_ifdetach(ctx->ifc_ifp);
+fail_intr_free:
+ if (scctx->isc_intr == IFLIB_INTR_MSIX || scctx->isc_intr == IFLIB_INTR_MSI)
+ pci_release_msi(ctx->ifc_dev);
+fail_queues:
+ /* XXX free queues */
+fail:
+ IFDI_DETACH(ctx);
+ return (err);
+}
+
+int
+iflib_device_attach(device_t dev)
+{
+ if_ctx_t ctx;
+ if_shared_ctx_t sctx;
+
+ if ((sctx = DEVICE_REGISTER(dev)) == NULL || sctx->isc_magic != IFLIB_MAGIC)
+ return (ENOTSUP);
+
+ pci_enable_busmaster(dev);
+
+ return (iflib_device_register(dev, NULL, sctx, &ctx));
+}
+
+int
+iflib_device_deregister(if_ctx_t ctx)
+{
+ if_t ifp = ctx->ifc_ifp;
+ iflib_txq_t txq;
+ iflib_rxq_t rxq;
+ device_t dev = ctx->ifc_dev;
+ int i, nqsets;
+ struct taskqgroup *tqg;
+
+ /* Make sure VLANS are not using driver */
+ if (if_vlantrunkinuse(ifp)) {
+ device_printf(dev,"Vlan in use, detach first\n");
+ return (EBUSY);
+ }
+
+ CTX_LOCK(ctx);
+ ctx->ifc_in_detach = 1;
+ iflib_stop(ctx);
+ CTX_UNLOCK(ctx);
+
+ /* Unregister VLAN events */
+ if (ctx->ifc_vlan_attach_event != NULL)
+ EVENTHANDLER_DEREGISTER(vlan_config, ctx->ifc_vlan_attach_event);
+ if (ctx->ifc_vlan_detach_event != NULL)
+ EVENTHANDLER_DEREGISTER(vlan_unconfig, ctx->ifc_vlan_detach_event);
+
+ iflib_netmap_detach(ifp);
+ ether_ifdetach(ifp);
+ /* ether_ifdetach calls if_qflush - lock must be destroy afterwards*/
+ CTX_LOCK_DESTROY(ctx);
+ if (ctx->ifc_led_dev != NULL)
+ led_destroy(ctx->ifc_led_dev);
+ /* XXX drain any dependent tasks */
+ nqsets = ctx->ifc_softc_ctx.isc_nqsets;
+ tqg = gctx->igc_io_tqg;
+ for (txq = ctx->ifc_txqs, i = 0, rxq = ctx->ifc_rxqs; i < nqsets; i++, txq++, rxq++) {
+ callout_drain(&txq->ift_timer);
+ callout_drain(&txq->ift_db_check);
+ if (txq->ift_task.gt_uniq != NULL)
+ taskqgroup_detach(tqg, &txq->ift_task);
+ if (rxq->ifr_task.gt_uniq != NULL)
+ taskqgroup_detach(tqg, &rxq->ifr_task);
+ }
+ tqg = gctx->igc_config_tqg;
+ if (ctx->ifc_admin_task.gt_uniq != NULL)
+ taskqgroup_detach(tqg, &ctx->ifc_admin_task);
+ if (ctx->ifc_vflr_task.gt_uniq != NULL)
+ taskqgroup_detach(tqg, &ctx->ifc_vflr_task);
+
+ IFDI_DETACH(ctx);
+ if (ctx->ifc_softc_ctx.isc_intr != IFLIB_INTR_LEGACY) {
+ pci_release_msi(dev);
+ }
+ if (ctx->ifc_softc_ctx.isc_intr != IFLIB_INTR_MSIX) {
+ iflib_irq_free(ctx, &ctx->ifc_legacy_irq);
+ }
+ if (ctx->ifc_msix_mem != NULL) {
+ bus_release_resource(ctx->ifc_dev, SYS_RES_MEMORY,
+ ctx->ifc_softc_ctx.isc_msix_bar, ctx->ifc_msix_mem);
+ ctx->ifc_msix_mem = NULL;
+ }
+
+ bus_generic_detach(dev);
+ if_free(ifp);
+
+ iflib_tx_structures_free(ctx);
+ iflib_rx_structures_free(ctx);
+ return (0);
+}
+
+
+int
+iflib_device_detach(device_t dev)
+{
+ if_ctx_t ctx = device_get_softc(dev);
+
+ return (iflib_device_deregister(ctx));
+}
+
+int
+iflib_device_suspend(device_t dev)
+{
+ if_ctx_t ctx = device_get_softc(dev);
+
+ CTX_LOCK(ctx);
+ IFDI_SUSPEND(ctx);
+ CTX_UNLOCK(ctx);
+
+ return bus_generic_suspend(dev);
+}
+int
+iflib_device_shutdown(device_t dev)
+{
+ if_ctx_t ctx = device_get_softc(dev);
+
+ CTX_LOCK(ctx);
+ IFDI_SHUTDOWN(ctx);
+ CTX_UNLOCK(ctx);
+
+ return bus_generic_suspend(dev);
+}
+
+
+int
+iflib_device_resume(device_t dev)
+{
+ if_ctx_t ctx = device_get_softc(dev);
+ iflib_txq_t txq = ctx->ifc_txqs;
+
+ CTX_LOCK(ctx);
+ IFDI_RESUME(ctx);
+ iflib_init_locked(ctx);
+ CTX_UNLOCK(ctx);
+ for (int i = 0; i < ctx->ifc_softc_ctx.isc_nqsets; 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)
+{
+
+ gctx = &global_ctx;
+ gctx->igc_io_tqg = qgroup_if_io_tqg;
+ gctx->igc_config_tqg = qgroup_if_config_tqg;
+
+ return (0);
+}
+
+static int
+iflib_module_event_handler(module_t mod, int what, void *arg)
+{
+ int err;
+
+ switch (what) {
+ case MOD_LOAD:
+ if ((err = iflib_module_init()) != 0)
+ return (err);
+ break;
+ case MOD_UNLOAD:
+ return (EBUSY);
+ default:
+ return (EOPNOTSUPP);
+ }
+
+ return (0);
+}
+
+/*********************************************************************
+ *
+ * PUBLIC FUNCTION DEFINITIONS
+ * ordered as in iflib.h
+ *
+ **********************************************************************/
+
+
+static void
+_iflib_assert(if_shared_ctx_t sctx)
+{
+ MPASS(sctx->isc_tx_maxsize);
+ MPASS(sctx->isc_tx_maxsegsize);
+
+ MPASS(sctx->isc_rx_maxsize);
+ MPASS(sctx->isc_rx_nsegments);
+ MPASS(sctx->isc_rx_maxsegsize);
+
+
+ MPASS(sctx->isc_txrx->ift_txd_encap);
+ MPASS(sctx->isc_txrx->ift_txd_flush);
+ MPASS(sctx->isc_txrx->ift_txd_credits_update);
+ MPASS(sctx->isc_txrx->ift_rxd_available);
+ MPASS(sctx->isc_txrx->ift_rxd_pkt_get);
+ MPASS(sctx->isc_txrx->ift_rxd_refill);
+ MPASS(sctx->isc_txrx->ift_rxd_flush);
+ MPASS(sctx->isc_nrxd);
+}
+
+static int
+iflib_register(if_ctx_t ctx)
+{
+ if_shared_ctx_t sctx = ctx->ifc_sctx;
+ driver_t *driver = sctx->isc_driver;
+ device_t dev = ctx->ifc_dev;
+ if_t ifp;
+
+ _iflib_assert(sctx);
+
+ CTX_LOCK_INIT(ctx, device_get_nameunit(ctx->ifc_dev));
+ MPASS(ctx->ifc_flags == 0);
+
+ ifp = ctx->ifc_ifp = if_gethandle(IFT_ETHER);
+ if (ifp == NULL) {
+ device_printf(dev, "can not allocate ifnet structure\n");
+ return (ENOMEM);
+ }
+
+ /*
+ * Initialize our context's device specific methods
+ */
+ kobj_init((kobj_t) ctx, (kobj_class_t) driver);
+ kobj_class_compile((kobj_class_t) driver);
+ driver->refs++;
+
+ if_initname(ifp, device_get_name(dev), device_get_unit(dev));
+ if_setsoftc(ifp, ctx);
+ if_setdev(ifp, dev);
+ if_setinitfn(ifp, iflib_if_init);
+ if_setioctlfn(ifp, iflib_if_ioctl);
+ if_settransmitfn(ifp, iflib_if_transmit);
+ if_setqflushfn(ifp, iflib_if_qflush);
+ if_setgetcounterfn(ifp, iflib_if_get_counter);
+ if_setflags(ifp, IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST);
+
+ if_setcapabilities(ifp, 0);
+ if_setcapenable(ifp, 0);
+
+ ctx->ifc_vlan_attach_event =
+ EVENTHANDLER_REGISTER(vlan_config, iflib_vlan_register, ctx,
+ EVENTHANDLER_PRI_FIRST);
+ ctx->ifc_vlan_detach_event =
+ EVENTHANDLER_REGISTER(vlan_unconfig, iflib_vlan_unregister, ctx,
+ EVENTHANDLER_PRI_FIRST);
+
+ ifmedia_init(&ctx->ifc_media, IFM_IMASK,
+ iflib_media_change, iflib_media_status);
+
+ return (0);
+}
+
+
+static int
+iflib_queues_alloc(if_ctx_t ctx)
+{
+ if_shared_ctx_t sctx = ctx->ifc_sctx;
+ device_t dev = ctx->ifc_dev;
+ int nqsets = ctx->ifc_softc_ctx.isc_nqsets;
+ iflib_txq_t txq;
+ iflib_rxq_t rxq;
+ iflib_qset_t qset;
+ iflib_fl_t fl = NULL;
+ int i, j, err, txconf, rxconf, fl_ifdi_offset;
+ iflib_dma_info_t ifdip;
+ uint32_t *qsizes = sctx->isc_qsizes;
+ uint8_t nqs = sctx->isc_nqs;
+ int nfree_lists = sctx->isc_nfl ? sctx->isc_nfl : 1;
+ caddr_t *vaddrs;
+ uint64_t *paddrs;
+ struct ifmp_ring **brscp;
+ int nbuf_rings = 1; /* XXX determine dynamically */
+
+ KASSERT(nqs > 0, ("number of queues must be at least 1"));
+
+ if (!(qset =
+ (iflib_qset_t) malloc(sizeof(struct iflib_qset) *
+ nqsets, M_IFLIB, M_NOWAIT | M_ZERO))) {
+ device_printf(dev, "Unable to allocate TX ring memory\n");
+ err = ENOMEM;
+ goto fail;
+ }
+
+/* Allocate the TX ring struct memory */
+ if (!(txq =
+ (iflib_txq_t) malloc(sizeof(struct iflib_txq) *
+ nqsets, M_IFLIB, M_NOWAIT | M_ZERO))) {
+ device_printf(dev, "Unable to allocate TX ring memory\n");
+ err = ENOMEM;
+ goto fail;
+ }
+
+ /* Now allocate the RX */
+ if (!(rxq =
+ (iflib_rxq_t) malloc(sizeof(struct iflib_rxq) *
+ nqsets, M_IFLIB, M_NOWAIT | M_ZERO))) {
+ device_printf(dev, "Unable to allocate RX ring memory\n");
+ err = ENOMEM;
+ goto rx_fail;
+ }
+ if (!(brscp = malloc(sizeof(void *) * nbuf_rings * nqsets, M_IFLIB, M_NOWAIT | M_ZERO))) {
+ device_printf(dev, "Unable to buf_ring_sc * memory\n");
+ err = ENOMEM;
+ goto rx_fail;
+ }
+
+ ctx->ifc_qsets = qset;
+ ctx->ifc_txqs = txq;
+ ctx->ifc_rxqs = rxq;
+
+ /*
+ * XXX handle allocation failure
+ */
+ for (qset = ctx->ifc_qsets, rxconf = txconf = i = 0; i < nqsets;
+ i++, txconf++, rxconf++, qset++, txq++, rxq++) {
+ /* Set up some basics */
+
+ if ((ifdip = malloc(sizeof(struct iflib_dma_info) * nqs, M_IFLIB, M_WAITOK|M_ZERO)) == NULL) {
+ device_printf(dev, "failed to allocate iflib_dma_info\n");
+ err = ENOMEM;
+ goto fail;
+ }
+ qset->ifq_ifdi = ifdip;
+ qset->ifq_nhwqs = nqs;
+ for (j = 0; j < nqs; j++, ifdip++) {
+ if (iflib_dma_alloc(ctx, qsizes[j], ifdip, BUS_DMA_NOWAIT)) {
+ device_printf(dev, "Unable to allocate Descriptor memory\n");
+ err = ENOMEM;
+ goto err_tx_desc;
+ }
+ bzero((void *)ifdip->idi_vaddr, qsizes[j]);
+ }
+ txq->ift_ctx = ctx;
+ txq->ift_id = i;
+ /* XXX fix this */
+ txq->ift_timer.c_cpu = i % mp_ncpus;
+ txq->ift_db_check.c_cpu = i % mp_ncpus;
+ txq->ift_nbr = nbuf_rings;
+ txq->ift_ifdi = &qset->ifq_ifdi[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);
+ callout_init_mtx(&txq->ift_db_check, &txq->ift_mtx, 0);
+
+ snprintf(txq->ift_db_mtx_name, MTX_NAME_LEN, "%s:tx(%d):db",
+ device_get_nameunit(dev), txq->ift_id);
+ TXDB_LOCK_INIT(txq);
+
+ txq->ift_br = brscp + i*nbuf_rings;
+ for (j = 0; j < nbuf_rings; j++) {
+ err = ifmp_ring_alloc(&txq->ift_br[j], 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 fail;
+ }
+ }
+ /*
+ * Next the RX queues...
+ */
+ rxq->ifr_ctx = ctx;
+ rxq->ifr_id = i;
+ if (sctx->isc_flags & IFLIB_HAS_CQ) {
+ rxq->ifr_ifdi = &qset->ifq_ifdi[1];
+ fl_ifdi_offset = 2;
+ } else {
+ fl_ifdi_offset = 1;
+ rxq->ifr_ifdi = NULL;
+ }
+ 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 fail;
+ }
+ rxq->ifr_fl = fl;
+ for (j = 0; j < nfree_lists; j++) {
+ rxq->ifr_fl[j].ifl_rxq = rxq;
+ rxq->ifr_fl[j].ifl_id = j;
+ rxq->ifr_fl[j].ifl_ifdi = &qset->ifq_ifdi[j + fl_ifdi_offset];
+ }
+ /* 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;
+ }
+ }
+
+ vaddrs = malloc(sizeof(caddr_t)*nqsets*nqs, M_IFLIB, M_WAITOK);
+ paddrs = malloc(sizeof(uint64_t)*nqsets*nqs, M_IFLIB, M_WAITOK);
+ for (i = 0; i < nqsets; i++) {
+ iflib_dma_info_t di = ctx->ifc_qsets[i].ifq_ifdi;
+
+ for (j = 0; j < nqs; j++, di++) {
+ vaddrs[i*nqs + j] = di->idi_vaddr;
+ paddrs[i*nqs + j] = di->idi_paddr;
+ }
+ }
+ if ((err = IFDI_QUEUES_ALLOC(ctx, vaddrs, paddrs, nqs)) != 0) {
+ device_printf(ctx->ifc_dev, "device queue allocation failed\n");
+ iflib_tx_structures_free(ctx);
+ free(vaddrs, M_IFLIB);
+ free(paddrs, M_IFLIB);
+ goto err_rx_desc;
+ }
+ free(vaddrs, M_IFLIB);
+ free(paddrs, M_IFLIB);
+
+ return (0);
+err_rx_desc:
+err_tx_desc:
+ if (ctx->ifc_rxqs != NULL)
+ free(ctx->ifc_rxqs, M_IFLIB);
+ ctx->ifc_rxqs = NULL;
+rx_fail:
+ 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 < ctx->ifc_softc_ctx.isc_nqsets; 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;
+ iflib_qset_t qset = ctx->ifc_qsets;
+ int i, j;
+
+ for (i = 0; i < ctx->ifc_softc_ctx.isc_nqsets; i++, txq++, qset++) {
+ iflib_txq_destroy(txq);
+ for (j = 0; j < qset->ifq_nhwqs; j++)
+ iflib_dma_free(&qset->ifq_ifdi[j]);
+ }
+ free(ctx->ifc_txqs, M_IFLIB);
+ free(ctx->ifc_qsets, M_IFLIB);
+ ctx->ifc_txqs = NULL;
+ ctx->ifc_qsets = NULL;
+ IFDI_QUEUES_FREE(ctx);
+}
+
+/*********************************************************************
+ *
+ * Initialize all receive rings.
+ *
+ **********************************************************************/
+static int
+iflib_rx_structures_setup(if_ctx_t ctx)
+{
+ iflib_rxq_t rxq = ctx->ifc_rxqs;
+ int i, q, err;
+
+ for (q = 0; q < ctx->ifc_softc_ctx.isc_nqsets; q++, rxq++) {
+ tcp_lro_free(&rxq->ifr_lc);
+ if (ctx->ifc_ifp->if_capenable & IFCAP_LRO) {
+ if ((err = tcp_lro_init(&rxq->ifr_lc)) != 0) {
+ device_printf(ctx->ifc_dev, "LRO Initialization failed!\n");
+ goto fail;
+ }
+ rxq->ifr_lro_enabled = TRUE;
+ rxq->ifr_lc.ifp = ctx->ifc_ifp;
+ }
+
+ IFDI_RXQ_SETUP(ctx, rxq->ifr_id);
+ }
+ return (0);
+fail:
+ /*
+ * Free RX software descriptors allocated so far, we will only handle
+ * the rings that completed, the failing case will have
+ * cleaned up for itself. 'q' failed, so its the terminus.
+ */
+ rxq = ctx->ifc_rxqs;
+ for (i = 0; i < q; ++i, rxq++) {
+ iflib_rx_sds_free(rxq);
+ rxq->ifr_gen = rxq->ifr_cidx = rxq->ifr_pidx = 0;
+ }
+ return (err);
+}
+
+/*********************************************************************
+ *
+ * Free all receive rings.
+ *
+ **********************************************************************/
+static void
+iflib_rx_structures_free(if_ctx_t ctx)
+{
+ iflib_rxq_t rxq = ctx->ifc_rxqs;
+
+ for (int i = 0; i < ctx->ifc_softc_ctx.isc_nqsets; i++, rxq++) {
+ iflib_rx_sds_free(rxq);
+ }
+}
+
+static int
+iflib_qset_structures_setup(if_ctx_t ctx)
+{
+ int err;
+
+ if ((err = iflib_tx_structures_setup(ctx)) != 0)
+ return (err);
+
+ if ((err = iflib_rx_structures_setup(ctx)) != 0) {
+ device_printf(ctx->ifc_dev, "iflib_rx_structures_setup failed: %d\n", err);
+ iflib_tx_structures_free(ctx);
+ iflib_rx_structures_free(ctx);
+ }
+ return (err);
+}
+
+int
+iflib_irq_alloc(if_ctx_t ctx, if_irq_t irq, int rid,
+ driver_filter_t filter, void *filter_arg, driver_intr_t handler, void *arg, char *name)
+{
+
+ return (_iflib_irq_alloc(ctx, irq, rid, filter, handler, arg, name));
+}
+
+int
+iflib_irq_alloc_generic(if_ctx_t ctx, if_irq_t irq, int rid,
+ iflib_intr_type_t type, driver_filter_t *filter,
+ void *filter_arg, int qid, char *name)
+{
+ struct grouptask *gtask;
+ struct taskqgroup *tqg;
+ iflib_filter_info_t info;
+ cpuset_t cpus;
+ task_fn_t *fn;
+ int tqrid;
+ void *q;
+ int err, i, cpuid;
+
+ info = &ctx->ifc_filter_info;
+
+ 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 = gctx->igc_io_tqg;
+ tqrid = irq->ii_rid;
+ fn = _task_fn_tx;
+ 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 = gctx->igc_io_tqg;
+ tqrid = irq->ii_rid;
+ fn = _task_fn_rx;
+ break;
+ case IFLIB_INTR_ADMIN:
+ q = ctx;
+ info = &ctx->ifc_filter_info;
+ gtask = &ctx->ifc_admin_task;
+ tqg = gctx->igc_config_tqg;
+ tqrid = -1;
+ fn = _task_fn_admin;
+ break;
+ default:
+ panic("unknown net intr type");
+ }
+ GROUPTASK_INIT(gtask, 0, fn, q);
+
+ info->ifi_filter = filter;
+ info->ifi_filter_arg = filter_arg;
+ info->ifi_task = gtask;
+
+ /* XXX query cpu that rid belongs to */
+
+ err = _iflib_irq_alloc(ctx, irq, rid, iflib_fast_intr, NULL, info, name);
+ if (err != 0)
+ return (err);
+ if (tqrid != -1 && CPU_COUNT(&ctx->ifc_cpus) > qid) {
+ CPU_COPY(&ctx->ifc_cpus, &cpus);
+ for (i = 0; i < qid; i++) {
+ cpuid = CPU_FFS(&cpus);
+ CPU_CLR(cpuid, &cpus);
+ }
+ taskqgroup_attach_cpu(tqg, gtask, q, CPU_FFS(&cpus), irq->ii_rid, name);
+ } else
+ taskqgroup_attach(tqg, gtask, q, tqrid, name);
+
+
+ return (0);
+}
+
+void
+iflib_softirq_alloc_generic(if_ctx_t ctx, int rid, iflib_intr_type_t type, void *arg, int qid, char *name)
+{
+ struct grouptask *gtask;
+ struct taskqgroup *tqg;
+ task_fn_t *fn;
+ void *q;
+
+ switch (type) {
+ case IFLIB_INTR_TX:
+ q = &ctx->ifc_txqs[qid];
+ gtask = &ctx->ifc_txqs[qid].ift_task;
+ tqg = gctx->igc_io_tqg;
+ fn = _task_fn_tx;
+ break;
+ case IFLIB_INTR_RX:
+ q = &ctx->ifc_rxqs[qid];
+ gtask = &ctx->ifc_rxqs[qid].ifr_task;
+ tqg = gctx->igc_io_tqg;
+ fn = _task_fn_rx;
+ break;
+ case IFLIB_INTR_ADMIN:
+ q = ctx;
+ gtask = &ctx->ifc_admin_task;
+ tqg = gctx->igc_config_tqg;
+ rid = -1;
+ fn = _task_fn_admin;
+ break;
+ case IFLIB_INTR_IOV:
+ q = ctx;
+ gtask = &ctx->ifc_vflr_task;
+ tqg = gctx->igc_config_tqg;
+ rid = -1;
+ fn = _task_fn_iov;
+ break;
+ default:
+ panic("unknown net intr type");
+ }
+ GROUPTASK_INIT(gtask, 0, fn, q);
+ taskqgroup_attach(tqg, gtask, q, rid, name);
+}
+
+void
+iflib_irq_free(if_ctx_t ctx, if_irq_t irq)
+{
+ if (irq->ii_tag)
+ bus_teardown_intr(ctx->ifc_dev, irq->ii_res, irq->ii_tag);
+
+ if (irq->ii_res)
+ bus_release_resource(ctx->ifc_dev, SYS_RES_IRQ, irq->ii_rid, irq->ii_res);
+}
+
+static int
+iflib_legacy_setup(if_ctx_t ctx, driver_filter_t filter, void *filter_arg, int *rid, char *name)
+{
+ iflib_txq_t txq = ctx->ifc_txqs;
+ iflib_rxq_t rxq = ctx->ifc_rxqs;
+ if_irq_t irq = &ctx->ifc_legacy_irq;
+ iflib_filter_info_t info;
+ struct grouptask *gtask;
+ struct taskqgroup *tqg;
+ task_fn_t *fn;
+ int tqrid;
+ void *q;
+ int err;
+
+ q = &ctx->ifc_rxqs[0];
+ info = &rxq[0].ifr_filter_info;
+ gtask = &rxq[0].ifr_task;
+ tqg = gctx->igc_io_tqg;
+ tqrid = irq->ii_rid = *rid;
+ fn = _task_fn_rx;
+
+ ctx->ifc_flags |= IFC_LEGACY;
+ info->ifi_filter = filter;
+ info->ifi_filter_arg = filter_arg;
+ info->ifi_task = gtask;
+
+ /* We allocate a single interrupt resource */
+ if ((err = _iflib_irq_alloc(ctx, irq, tqrid, iflib_fast_intr, NULL, info, name)) != 0)
+ return (err);
+ GROUPTASK_INIT(gtask, 0, fn, q);
+ taskqgroup_attach(tqg, gtask, q, tqrid, name);
+
+ GROUPTASK_INIT(&txq->ift_task, 0, _task_fn_tx, txq);
+ taskqgroup_attach(gctx->igc_io_tqg, &txq->ift_task, txq, tqrid, "tx");
+ GROUPTASK_INIT(&ctx->ifc_admin_task, 0, _task_fn_admin, ctx);
+ taskqgroup_attach(gctx->igc_config_tqg, &ctx->ifc_admin_task, ctx, -1, "admin/link");
+
+ 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)
+{
+
+ GROUPTASK_ENQUEUE(&ctx->ifc_admin_task);
+}
+
+void
+iflib_iov_intr_deferred(if_ctx_t ctx)
+{
+
+ GROUPTASK_ENQUEUE(&ctx->ifc_vflr_task);
+}
+
+void
+iflib_io_tqg_attach(struct grouptask *gt, void *uniq, int cpu, char *name)
+{
+
+ taskqgroup_attach_cpu(gctx->igc_io_tqg, gt, uniq, cpu, -1, name);
+}
+
+void
+iflib_config_gtask_init(if_ctx_t ctx, struct grouptask *gtask, task_fn_t *fn,
+ char *name)
+{
+
+ GROUPTASK_INIT(gtask, 0, fn, ctx);
+ taskqgroup_attach(gctx->igc_config_tqg, gtask, gtask, -1, name);
+}
+
+void
+iflib_link_state_change(if_ctx_t ctx, int link_state)
+{
+ if_t ifp = ctx->ifc_ifp;
+ iflib_txq_t txq = ctx->ifc_txqs;
+
+#if 0
+ if_setbaudrate(ifp, baudrate);
+#endif
+ /* 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_nqsets; 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;
+
+ if (ctx->isc_txd_credits_update == NULL)
+ return (0);
+
+ if ((credits = ctx->isc_txd_credits_update(ctx->ifc_softc, txq->ift_id, txq->ift_cidx_processed, true)) == 0)
+ return (0);
+
+ txq->ift_processed += credits;
+ txq->ift_cidx_processed += credits;
+
+ 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, int cidx)
+{
+
+ return (ctx->isc_rxd_available(ctx->ifc_softc, rxq->ifr_id, cidx));
+}
+
+void
+iflib_add_int_delay_sysctl(if_ctx_t ctx, const char *name,
+ const char *description, if_int_delay_info_t info,
+ int offset, int value)
+{
+ info->iidi_ctx = ctx;
+ info->iidi_offset = offset;
+ info->iidi_value = value;
+ SYSCTL_ADD_PROC(device_get_sysctl_ctx(ctx->ifc_dev),
+ SYSCTL_CHILDREN(device_get_sysctl_tree(ctx->ifc_dev)),
+ OID_AUTO, name, CTLTYPE_INT|CTLFLAG_RW,
+ info, 0, iflib_sysctl_int_delay, "I", description);
+}
+
+struct mtx *
+iflib_ctx_lock_get(if_ctx_t ctx)
+{
+
+ return (&ctx->ifc_mtx);
+}
+
+static int
+iflib_msix_init(if_ctx_t ctx)
+{
+ device_t dev = ctx->ifc_dev;
+ if_shared_ctx_t sctx = ctx->ifc_sctx;
+ if_softc_ctx_t scctx = &ctx->ifc_softc_ctx;
+ int vectors, queues, queuemsgs, msgs;
+ int err, admincnt, bar;
+
+ bar = ctx->ifc_softc_ctx.isc_msix_bar;
+ admincnt = sctx->isc_admin_intrcnt;
+ /* Override by tuneable */
+ if (enable_msix == 0)
+ goto msi;
+
+ /*
+ ** When used in a virtualized environment
+ ** PCI BUSMASTER capability may not be set
+ ** so explicity set it here and rewrite
+ ** the ENABLE in the MSIX control register
+ ** at this point to cause the host to
+ ** successfully initialize us.
+ */
+ {
+ uint16_t pci_cmd_word;
+ int msix_ctrl, rid;
+
+ rid = 0;
+ pci_cmd_word = pci_read_config(dev, PCIR_COMMAND, 2);
+ pci_cmd_word |= PCIM_CMD_BUSMASTEREN;
+ pci_write_config(dev, PCIR_COMMAND, pci_cmd_word, 2);
+ pci_find_cap(dev, PCIY_MSIX, &rid);
+ rid += PCIR_MSIX_CTRL;
+ msix_ctrl = pci_read_config(dev, rid, 2);
+ msix_ctrl |= PCIM_MSIXCTRL_MSIX_ENABLE;
+ pci_write_config(dev, rid, msix_ctrl, 2);
+ }
+
+ /* First try MSI/X */
+ ctx->ifc_msix_mem = bus_alloc_resource_any(dev,
+ SYS_RES_MEMORY, &bar, RF_ACTIVE);
+ if (ctx->ifc_msix_mem == NULL) {
+ /* May not be enabled */
+ device_printf(dev, "Unable to map MSIX table \n");
+ goto msi;
+ }
+
+ if ((msgs = pci_msix_count(dev)) == 0) { /* system has msix disabled */
+ device_printf(dev, "System has MSIX disabled \n");
+ bus_release_resource(dev, SYS_RES_MEMORY,
+ bar, ctx->ifc_msix_mem);
+ ctx->ifc_msix_mem = NULL;
+ goto msi;
+ }
+#if IFLIB_DEBUG
+ /* use only 1 qset in debug mode */
+ queuemsgs = min(msgs - admincnt, 1);
+#else
+ queuemsgs = msgs - admincnt;
+#endif
+ if (bus_get_cpus(dev, INTR_CPUS, &ctx->ifc_cpus, sizeof(ctx->ifc_cpus)) == 0) {
+#ifdef RSS
+ queues = imin(queuemsgs, rss_getnumbuckets());
+#else
+ queues = queuemsgs;
+#endif
+ queues = imin(CPU_COUNT(&ctx->ifc_cpus), queues);
+ device_printf(dev, "pxm cpus: %d queue msgs: %d admincnt: %d\n",
+ CPU_COUNT(&ctx->ifc_cpus), queuemsgs, admincnt);
+ } else {
+ device_printf(dev, "Unable to fetch CPU list\n");
+ /* Figure out a reasonable auto config value */
+ queues = min(queuemsgs, mp_ncpus);
+ }
+#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_queues > 0 && iflib_num_queues < queues)
+ queues = iflib_num_queues;
+ device_printf(dev, "using %d queues\n", queues);
+
+ vectors = queues + admincnt;
+ if ((err = pci_alloc_msix(dev, &vectors)) == 0) {
+ device_printf(dev,
+ "Using MSIX interrupts with %d vectors\n", vectors);
+ scctx->isc_vectors = vectors;
+ scctx->isc_nqsets = queues;
+ scctx->isc_intr = IFLIB_INTR_MSIX;
+ return (vectors);
+ } else {
+ device_printf(dev, "failed to allocate %d msix vectors, err: %d - using MSI\n", vectors, err);
+ }
+msi:
+ vectors = pci_msi_count(dev);
+ scctx->isc_nqsets = 1;
+ scctx->isc_vectors = vectors;
+ if (vectors == 1 && pci_alloc_msi(dev, &vectors) == 0) {
+ device_printf(dev,"Using an MSI interrupt\n");
+ scctx->isc_intr = IFLIB_INTR_MSI;
+ } else {
+ device_printf(dev,"Using a Legacy interrupt\n");
+ scctx->isc_intr = IFLIB_INTR_LEGACY;
+ }
+
+ return (vectors);
+}
+
+char * ring_states[] = { "IDLE", "BUSY", "STALLED", "ABDICATED" };
+
+static int
+mp_ring_state_handler(SYSCTL_HANDLER_ARGS)
+{
+ int rc;
+ uint16_t *state = ((uint16_t *)oidp->oid_arg1);
+ struct sbuf *sb;
+ char *ring_state = "UNKNOWN";
+
+ /* XXX needed ? */
+ rc = sysctl_wire_old_buffer(req, 0);
+ MPASS(rc == 0);
+ if (rc != 0)
+ return (rc);
+ sb = sbuf_new_for_sysctl(NULL, NULL, 80, req);
+ MPASS(sb != NULL);
+ if (sb == NULL)
+ return (ENOMEM);
+ if (state[3] <= 3)
+ ring_state = ring_states[state[3]];
+
+ sbuf_printf(sb, "pidx_head: %04hd pidx_tail: %04hd cidx: %04hd state: %s",
+ state[0], state[1], state[2], ring_state);
+ rc = sbuf_finish(sb);
+ sbuf_delete(sb);
+ return(rc);
+}
+
+#define NAME_BUFLEN 32
+static void
+iflib_add_device_sysctl(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);
+ child = SYSCTL_CHILDREN(device_get_sysctl_tree(dev));
+
+ node = SYSCTL_ADD_NODE(ctx_list, child, OID_AUTO, "iflib",
+ CTLFLAG_RD, NULL, "IFLIB fields");
+ child = SYSCTL_CHILDREN(node);
+ if (scctx->isc_nqsets > 100)
+ qfmt = "q%03d";
+ else if (scctx->isc_nqsets > 10)
+ qfmt = "q%02d";
+ else
+ qfmt = "q%d";
+ for (i = 0, txq = ctx->ifc_txqs, rxq = ctx->ifc_rxqs; i < scctx->isc_nqsets; i++, txq++, rxq++) {
+ snprintf(namebuf, NAME_BUFLEN, qfmt, i);
+ queue_node = SYSCTL_ADD_NODE(ctx_list, child, OID_AUTO, namebuf,
+ CTLFLAG_RD, NULL, "Queue Name");
+ queue_list = SYSCTL_CHILDREN(queue_node);
+ if (sctx->isc_flags & IFLIB_HAS_CQ) {
+ SYSCTL_ADD_INT(ctx_list, queue_list, OID_AUTO, "rxq_cq_pidx",
+ CTLFLAG_RD,
+ &rxq->ifr_pidx, 1, "Producer Index");
+ SYSCTL_ADD_INT(ctx_list, queue_list, OID_AUTO, "rxq_cq_cidx",
+ CTLFLAG_RD,
+ &rxq->ifr_cidx, 1, "Consumer Index");
+ }
+ for (j = 0, fl = rxq->ifr_fl; j < rxq->ifr_nfl; j++, fl++) {
+ snprintf(namebuf, NAME_BUFLEN, "rxq_fl%d", j);
+ fl_node = SYSCTL_ADD_NODE(ctx_list, queue_list, OID_AUTO, namebuf,
+ CTLFLAG_RD, NULL, "freelist Name");
+ fl_list = SYSCTL_CHILDREN(fl_node);
+ SYSCTL_ADD_INT(ctx_list, fl_list, OID_AUTO, "pidx",
+ CTLFLAG_RD,
+ &fl->ifl_pidx, 1, "Producer Index");
+ SYSCTL_ADD_INT(ctx_list, fl_list, OID_AUTO, "cidx",
+ CTLFLAG_RD,
+ &fl->ifl_cidx, 1, "Consumer Index");
+ SYSCTL_ADD_INT(ctx_list, fl_list, OID_AUTO, "credits",
+ CTLFLAG_RD,
+ &fl->ifl_credits, 1, "credits available");
+ }
+ SYSCTL_ADD_QUAD(ctx_list, queue_list, OID_AUTO, "mbuf_defrag",
+ CTLFLAG_RD,
+ &txq->ift_mbuf_defrag, "# of times m_defrag was called");
+ SYSCTL_ADD_QUAD(ctx_list, queue_list, OID_AUTO, "mbuf_defrag_failed",
+ CTLFLAG_RD,
+ &txq->ift_mbuf_defrag_failed, "# of times m_defrag failed");
+ SYSCTL_ADD_QUAD(ctx_list, queue_list, OID_AUTO, "no_desc_avail",
+ CTLFLAG_RD,
+ &txq->ift_mbuf_defrag_failed, "# of times no descriptors were available");
+ SYSCTL_ADD_QUAD(ctx_list, queue_list, OID_AUTO, "tx_map_failed",
+ CTLFLAG_RD,
+ &txq->ift_map_failed, "# of times dma map failed");
+ SYSCTL_ADD_QUAD(ctx_list, queue_list, OID_AUTO, "txd_encap_efbig",
+ CTLFLAG_RD,
+ &txq->ift_txd_encap_efbig, "# of times txd_encap returned EFBIG");
+ SYSCTL_ADD_QUAD(ctx_list, queue_list, OID_AUTO, "no_tx_dma_setup",
+ CTLFLAG_RD,
+ &txq->ift_no_tx_dma_setup, "# of times map failed for other than EFBIG");
+ SYSCTL_ADD_INT(ctx_list, queue_list, OID_AUTO, "txq_pidx",
+ CTLFLAG_RD,
+ &txq->ift_pidx, 1, "Producer Index");
+ SYSCTL_ADD_INT(ctx_list, queue_list, OID_AUTO, "txq_cidx",
+ CTLFLAG_RD,
+ &txq->ift_cidx, 1, "Consumer Index");
+ SYSCTL_ADD_INT(ctx_list, queue_list, OID_AUTO, "txq_cidx_processed",
+ CTLFLAG_RD,
+ &txq->ift_cidx_processed, 1, "Consumer Index seen by credit update");
+ SYSCTL_ADD_INT(ctx_list, queue_list, OID_AUTO, "txq_processed",
+ CTLFLAG_RD,
+ &txq->ift_processed, 1, "descriptors procesed for clean");
+ SYSCTL_ADD_INT(ctx_list, queue_list, OID_AUTO, "txq_in_use",
+ CTLFLAG_RD,
+ &txq->ift_in_use, 1, "descriptors in use");
+ SYSCTL_ADD_INT(ctx_list, queue_list, OID_AUTO, "txq_cleaned",
+ CTLFLAG_RD,
+ &txq->ift_cleaned, 1, "total cleaned");
+ SYSCTL_ADD_PROC(ctx_list, queue_list, OID_AUTO, "ring_state",
+ CTLTYPE_STRING | CTLFLAG_RD, __DEVOLATILE(uint64_t *, &txq->ift_br[0]->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[0]->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[0]->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[0]->starts,
+ "# of normal consumer starts in the mp_ring for this queue");
+ SYSCTL_ADD_COUNTER_U64(ctx_list, queue_list, OID_AUTO, "r_stalls",
+ CTLFLAG_RD, &txq->ift_br[0]->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[0]->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[0]->abdications,
+ "# of consumer abdications in the mp_ring for this queue");
+
+ }
+}
Index: sys/net/mp_ring.h
===================================================================
--- /dev/null
+++ sys/net/mp_ring.h
@@ -0,0 +1,69 @@
+/*-
+ * Copyright (c) 2014 Chelsio Communications, Inc.
+ * All rights reserved.
+ * Written by: Navdeep Parhar <np@FreeBSD.org>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * $FreeBSD$
+ *
+ */
+
+#ifndef __NET_MP_RING_H
+#define __NET_MP_RING_H
+
+#ifndef _KERNEL
+#error "no user-serviceable parts inside"
+#endif
+
+struct ifmp_ring;
+typedef u_int (*mp_ring_drain_t)(struct ifmp_ring *, u_int, u_int);
+typedef u_int (*mp_ring_can_drain_t)(struct ifmp_ring *);
+typedef void (*mp_ring_serial_t)(struct ifmp_ring *);
+
+struct ifmp_ring {
+ volatile uint64_t state __aligned(CACHE_LINE_SIZE);
+
+ int size __aligned(CACHE_LINE_SIZE);
+ void * cookie;
+ struct malloc_type * mt;
+ mp_ring_drain_t drain;
+ mp_ring_can_drain_t can_drain; /* cheap, may be unreliable */
+ counter_u64_t enqueues;
+ counter_u64_t drops;
+ counter_u64_t starts;
+ counter_u64_t stalls;
+ counter_u64_t restarts; /* recovered after stalling */
+ counter_u64_t abdications;
+
+ void * volatile items[] __aligned(CACHE_LINE_SIZE);
+};
+
+int ifmp_ring_alloc(struct ifmp_ring **, int, void *, mp_ring_drain_t,
+ mp_ring_can_drain_t, struct malloc_type *, int);
+void ifmp_ring_free(struct ifmp_ring *);
+int ifmp_ring_enqueue(struct ifmp_ring *, void **, int, int);
+void ifmp_ring_check_drainage(struct ifmp_ring *, int);
+void ifmp_ring_reset_stats(struct ifmp_ring *);
+int ifmp_ring_is_idle(struct ifmp_ring *);
+int ifmp_ring_is_stalled(struct ifmp_ring *r);
+#endif
Index: sys/net/mp_ring.c
===================================================================
--- /dev/null
+++ sys/net/mp_ring.c
@@ -0,0 +1,379 @@
+/*-
+ * Copyright (c) 2014 Chelsio Communications, Inc.
+ * All rights reserved.
+ * Written by: Navdeep Parhar <np@FreeBSD.org>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <sys/types.h>
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/counter.h>
+#include <sys/lock.h>
+#include <sys/malloc.h>
+#include <machine/cpu.h>
+
+#include <net/mp_ring.h>
+
+#if defined(__i386__)
+#define atomic_cmpset_acq_64 atomic_cmpset_64
+#define atomic_cmpset_rel_64 atomic_cmpset_64
+#endif
+
+union ring_state {
+ struct {
+ uint16_t pidx_head;
+ uint16_t pidx_tail;
+ uint16_t cidx;
+ uint16_t flags;
+ };
+ uint64_t state;
+};
+
+enum {
+ IDLE = 0, /* consumer ran to completion, nothing more to do. */
+ BUSY, /* consumer is running already, or will be shortly. */
+ STALLED, /* consumer stopped due to lack of resources. */
+ ABDICATED, /* consumer stopped even though there was work to be
+ done because it wants another thread to take over. */
+};
+
+static inline uint16_t
+space_available(struct ifmp_ring *r, union ring_state s)
+{
+ uint16_t x = r->size - 1;
+
+ if (s.cidx == s.pidx_head)
+ return (x);
+ else if (s.cidx > s.pidx_head)
+ return (s.cidx - s.pidx_head - 1);
+ else
+ return (x - s.pidx_head + s.cidx);
+}
+
+static inline uint16_t
+increment_idx(struct ifmp_ring *r, uint16_t idx, uint16_t n)
+{
+ int x = r->size - idx;
+
+ MPASS(x > 0);
+ return (x > n ? idx + n : n - x);
+}
+
+/* Consumer is about to update the ring's state to s */
+static inline uint16_t
+state_to_flags(union ring_state s, int abdicate)
+{
+
+ if (s.cidx == s.pidx_tail)
+ return (IDLE);
+ else if (abdicate && s.pidx_tail != s.pidx_head)
+ return (ABDICATED);
+
+ return (BUSY);
+}
+
+/*
+ * Caller passes in a state, with a guarantee that there is work to do and that
+ * all items up to the pidx_tail in the state are visible.
+ */
+static void
+drain_ring(struct ifmp_ring *r, union ring_state os, uint16_t prev, int budget)
+{
+ union ring_state ns;
+ int n, pending, total;
+ uint16_t cidx = os.cidx;
+ uint16_t pidx = os.pidx_tail;
+
+ MPASS(os.flags == BUSY);
+ MPASS(cidx != pidx);
+
+ if (prev == IDLE)
+ counter_u64_add(r->starts, 1);
+ pending = 0;
+ total = 0;
+
+ while (cidx != pidx) {
+
+ /* Items from cidx to pidx are available for consumption. */
+ n = r->drain(r, cidx, pidx);
+ if (n == 0) {
+ critical_enter();
+ do {
+ os.state = ns.state = r->state;
+ ns.cidx = cidx;
+ ns.flags = STALLED;
+ } while (atomic_cmpset_64(&r->state, os.state,
+ ns.state) == 0);
+ critical_exit();
+ if (prev != STALLED)
+ counter_u64_add(r->stalls, 1);
+ else if (total > 0) {
+ counter_u64_add(r->restarts, 1);
+ counter_u64_add(r->stalls, 1);
+ }
+ break;
+ }
+ cidx = increment_idx(r, cidx, n);
+ pending += n;
+ total += n;
+
+ /*
+ * We update the cidx only if we've caught up with the pidx, the
+ * real cidx is getting too far ahead of the one visible to
+ * everyone else, or we have exceeded our budget.
+ */
+ if (cidx != pidx && pending < 64 && total < budget)
+ continue;
+ critical_enter();
+ do {
+ os.state = ns.state = r->state;
+ ns.cidx = cidx;
+ ns.flags = state_to_flags(ns, total >= budget);
+ } while (atomic_cmpset_acq_64(&r->state, os.state, ns.state) == 0);
+ critical_exit();
+
+ if (ns.flags == ABDICATED)
+ counter_u64_add(r->abdications, 1);
+ if (ns.flags != BUSY) {
+ /* Wrong loop exit if we're going to stall. */
+ MPASS(ns.flags != STALLED);
+ if (prev == STALLED) {
+ MPASS(total > 0);
+ counter_u64_add(r->restarts, 1);
+ }
+ break;
+ }
+
+ /*
+ * The acquire style atomic above guarantees visibility of items
+ * associated with any pidx change that we notice here.
+ */
+ pidx = ns.pidx_tail;
+ pending = 0;
+ }
+}
+
+int
+ifmp_ring_alloc(struct ifmp_ring **pr, int size, void *cookie, mp_ring_drain_t drain,
+ mp_ring_can_drain_t can_drain, struct malloc_type *mt, int flags)
+{
+ struct ifmp_ring *r;
+
+ /* All idx are 16b so size can be 65536 at most */
+ if (pr == NULL || size < 2 || size > 65536 || drain == NULL ||
+ can_drain == NULL)
+ return (EINVAL);
+ *pr = NULL;
+ flags &= M_NOWAIT | M_WAITOK;
+ MPASS(flags != 0);
+
+ r = malloc(__offsetof(struct ifmp_ring, items[size]), mt, flags | M_ZERO);
+ if (r == NULL)
+ return (ENOMEM);
+ r->size = size;
+ r->cookie = cookie;
+ r->mt = mt;
+ r->drain = drain;
+ r->can_drain = can_drain;
+ r->enqueues = counter_u64_alloc(flags);
+ r->drops = counter_u64_alloc(flags);
+ r->starts = counter_u64_alloc(flags);
+ r->stalls = counter_u64_alloc(flags);
+ r->restarts = counter_u64_alloc(flags);
+ r->abdications = counter_u64_alloc(flags);
+ if (r->enqueues == NULL || r->drops == NULL || r->starts == NULL ||
+ r->stalls == NULL || r->restarts == NULL ||
+ r->abdications == NULL) {
+ ifmp_ring_free(r);
+ return (ENOMEM);
+ }
+
+ *pr = r;
+ return (0);
+}
+
+void
+ifmp_ring_free(struct ifmp_ring *r)
+{
+
+ if (r == NULL)
+ return;
+
+ if (r->enqueues != NULL)
+ counter_u64_free(r->enqueues);
+ if (r->drops != NULL)
+ counter_u64_free(r->drops);
+ if (r->starts != NULL)
+ counter_u64_free(r->starts);
+ if (r->stalls != NULL)
+ counter_u64_free(r->stalls);
+ if (r->restarts != NULL)
+ counter_u64_free(r->restarts);
+ if (r->abdications != NULL)
+ counter_u64_free(r->abdications);
+
+ free(r, r->mt);
+}
+
+/*
+ * Enqueue n items and maybe drain the ring for some time.
+ *
+ * Returns an errno.
+ */
+int
+ifmp_ring_enqueue(struct ifmp_ring *r, void **items, int n, int budget)
+{
+ union ring_state os, ns;
+ uint16_t pidx_start, pidx_stop;
+ int i;
+
+ MPASS(items != NULL);
+ MPASS(n > 0);
+
+ /*
+ * Reserve room for the new items. Our reservation, if successful, is
+ * from 'pidx_start' to 'pidx_stop'.
+ */
+ for (;;) {
+ os.state = r->state;
+ if (n >= space_available(r, os)) {
+ counter_u64_add(r->drops, n);
+ MPASS(os.flags != IDLE);
+ if (os.flags == STALLED)
+ ifmp_ring_check_drainage(r, 0);
+ return (ENOBUFS);
+ }
+ ns.state = os.state;
+ ns.pidx_head = increment_idx(r, os.pidx_head, n);
+ critical_enter();
+ if (atomic_cmpset_64(&r->state, os.state, ns.state))
+ break;
+ critical_exit();
+ cpu_spinwait();
+ }
+ pidx_start = os.pidx_head;
+ pidx_stop = ns.pidx_head;
+
+ /*
+ * Wait for other producers who got in ahead of us to enqueue their
+ * items, one producer at a time. It is our turn when the ring's
+ * pidx_tail reaches the begining of our reservation (pidx_start).
+ */
+ while (ns.pidx_tail != pidx_start) {
+ cpu_spinwait();
+ ns.state = r->state;
+ }
+
+ /* Now it is our turn to fill up the area we reserved earlier. */
+ i = pidx_start;
+ do {
+ r->items[i] = *items++;
+ if (__predict_false(++i == r->size))
+ i = 0;
+ } while (i != pidx_stop);
+
+ /*
+ * Update the ring's pidx_tail. The release style atomic guarantees
+ * that the items are visible to any thread that sees the updated pidx.
+ */
+ do {
+ os.state = ns.state = r->state;
+ ns.pidx_tail = pidx_stop;
+ ns.flags = BUSY;
+ } while (atomic_cmpset_rel_64(&r->state, os.state, ns.state) == 0);
+ critical_exit();
+ counter_u64_add(r->enqueues, n);
+
+ /*
+ * Turn into a consumer if some other thread isn't active as a consumer
+ * already.
+ */
+ if (os.flags != BUSY)
+ drain_ring(r, ns, os.flags, budget);
+
+ return (0);
+}
+
+void
+ifmp_ring_check_drainage(struct ifmp_ring *r, int budget)
+{
+ union ring_state os, ns;
+
+ os.state = r->state;
+ if (os.flags != STALLED || os.pidx_head != os.pidx_tail || r->can_drain(r) == 0)
+ return;
+
+ MPASS(os.cidx != os.pidx_tail); /* implied by STALLED */
+ ns.state = os.state;
+ ns.flags = BUSY;
+
+ /*
+ * The acquire style atomic guarantees visibility of items associated
+ * with the pidx that we read here.
+ */
+ if (!atomic_cmpset_acq_64(&r->state, os.state, ns.state))
+ return;
+
+ drain_ring(r, ns, os.flags, budget);
+}
+
+void
+ifmp_ring_reset_stats(struct ifmp_ring *r)
+{
+
+ counter_u64_zero(r->enqueues);
+ counter_u64_zero(r->drops);
+ counter_u64_zero(r->starts);
+ counter_u64_zero(r->stalls);
+ counter_u64_zero(r->restarts);
+ counter_u64_zero(r->abdications);
+}
+
+int
+ifmp_ring_is_idle(struct ifmp_ring *r)
+{
+ union ring_state s;
+
+ s.state = r->state;
+ if (s.pidx_head == s.pidx_tail && s.pidx_tail == s.cidx &&
+ s.flags == IDLE)
+ return (1);
+
+ return (0);
+}
+
+int
+ifmp_ring_is_stalled(struct ifmp_ring *r)
+{
+ union ring_state s;
+
+ s.state = r->state;
+ if (s.pidx_head == s.pidx_tail && s.flags == STALLED)
+ return (1);
+
+ return (0);
+}