xref: /freebsd/sys/dev/cxgb/cxgb_main.c (revision a5eb009b49ceb08697d283fa45f035ba71b9a17e)

/**************************************************************************

Copyright (c) 2007-2009, Chelsio Inc.
All rights reserved.

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:

 1. Redistributions of source code must retain the above copyright notice,
    this list of conditions and the following disclaimer.

 2. Neither the name of the Chelsio Corporation nor the names of its
    contributors may be used to endorse or promote products derived from
    this software without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
POSSIBILITY OF SUCH DAMAGE.

***************************************************************************/

#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");

#include "opt_inet.h"

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/bus.h>
#include <sys/module.h>
#include <sys/pciio.h>
#include <sys/conf.h>
#include <machine/bus.h>
#include <machine/resource.h>
#include <sys/bus_dma.h>
#include <sys/ktr.h>
#include <sys/rman.h>
#include <sys/ioccom.h>
#include <sys/mbuf.h>
#include <sys/linker.h>
#include <sys/firmware.h>
#include <sys/socket.h>
#include <sys/sockio.h>
#include <sys/smp.h>
#include <sys/sysctl.h>
#include <sys/syslog.h>
#include <sys/queue.h>
#include <sys/taskqueue.h>
#include <sys/proc.h>

#include <net/bpf.h>
#include <net/ethernet.h>
#include <net/if.h>
#include <net/if_var.h>
#include <net/if_arp.h>
#include <net/if_dl.h>
#include <net/if_media.h>
#include <net/if_types.h>
#include <net/if_vlan_var.h>

#include <netinet/in_systm.h>
#include <netinet/in.h>
#include <netinet/if_ether.h>
#include <netinet/ip.h>
#include <netinet/ip.h>
#include <netinet/tcp.h>
#include <netinet/udp.h>

#include <dev/pci/pcireg.h>
#include <dev/pci/pcivar.h>
#include <dev/pci/pci_private.h>

#include <cxgb_include.h>

#ifdef PRIV_SUPPORTED
#include <sys/priv.h>
#endif

static int cxgb_setup_interrupts(adapter_t *);
static void cxgb_teardown_interrupts(adapter_t *);
static void cxgb_init(void *);
static int cxgb_init_locked(struct port_info *);
static int cxgb_uninit_locked(struct port_info *);
static int cxgb_uninit_synchronized(struct port_info *);
static int cxgb_ioctl(struct ifnet *, unsigned long, caddr_t);
static int cxgb_media_change(struct ifnet *);
static int cxgb_ifm_type(int);
static void cxgb_build_medialist(struct port_info *);
static void cxgb_media_status(struct ifnet *, struct ifmediareq *);
static uint64_t cxgb_get_counter(struct ifnet *, ift_counter);
static int setup_sge_qsets(adapter_t *);
static void cxgb_async_intr(void *);
static void cxgb_tick_handler(void *, int);
static void cxgb_tick(void *);
static void link_check_callout(void *);
static void check_link_status(void *, int);
static void setup_rss(adapter_t *sc);
static int alloc_filters(struct adapter *);
static int setup_hw_filters(struct adapter *);
static int set_filter(struct adapter *, int, const struct filter_info *);
static inline void mk_set_tcb_field(struct cpl_set_tcb_field *, unsigned int,
    unsigned int, u64, u64);
static inline void set_tcb_field_ulp(struct cpl_set_tcb_field *, unsigned int,
    unsigned int, u64, u64);
#ifdef TCP_OFFLOAD
static int cpl_not_handled(struct sge_qset *, struct rsp_desc *, struct mbuf *);
#endif

/* Attachment glue for the PCI controller end of the device.  Each port of
 * the device is attached separately, as defined later.
 */
static int cxgb_controller_probe(device_t);
static int cxgb_controller_attach(device_t);
static int cxgb_controller_detach(device_t);
static void cxgb_free(struct adapter *);
static __inline void reg_block_dump(struct adapter *ap, uint8_t *buf, unsigned int start,
    unsigned int end);
static void cxgb_get_regs(adapter_t *sc, struct ch_ifconf_regs *regs, uint8_t *buf);
static int cxgb_get_regs_len(void);
static void touch_bars(device_t dev);
static void cxgb_update_mac_settings(struct port_info *p);
#ifdef TCP_OFFLOAD
static int toe_capability(struct port_info *, int);
#endif

static device_method_t cxgb_controller_methods[] = {
	DEVMETHOD(device_probe,		cxgb_controller_probe),
	DEVMETHOD(device_attach,	cxgb_controller_attach),
	DEVMETHOD(device_detach,	cxgb_controller_detach),

	DEVMETHOD_END
};

static driver_t cxgb_controller_driver = {
	"cxgbc",
	cxgb_controller_methods,
	sizeof(struct adapter)
};

static int cxgbc_mod_event(module_t, int, void *);
static devclass_t	cxgb_controller_devclass;
DRIVER_MODULE(cxgbc, pci, cxgb_controller_driver, cxgb_controller_devclass,
    cxgbc_mod_event, 0);
MODULE_VERSION(cxgbc, 1);
MODULE_DEPEND(cxgbc, firmware, 1, 1, 1);

/*
 * Attachment glue for the ports.  Attachment is done directly to the
 * controller device.
 */
static int cxgb_port_probe(device_t);
static int cxgb_port_attach(device_t);
static int cxgb_port_detach(device_t);

static device_method_t cxgb_port_methods[] = {
	DEVMETHOD(device_probe,		cxgb_port_probe),
	DEVMETHOD(device_attach,	cxgb_port_attach),
	DEVMETHOD(device_detach,	cxgb_port_detach),
	{ 0, 0 }
};

static driver_t cxgb_port_driver = {
	"cxgb",
	cxgb_port_methods,
	0
};

static d_ioctl_t cxgb_extension_ioctl;
static d_open_t cxgb_extension_open;
static d_close_t cxgb_extension_close;

static struct cdevsw cxgb_cdevsw = {
       .d_version =    D_VERSION,
       .d_flags =      0,
       .d_open =       cxgb_extension_open,
       .d_close =      cxgb_extension_close,
       .d_ioctl =      cxgb_extension_ioctl,
       .d_name =       "cxgb",
};

static devclass_t	cxgb_port_devclass;
DRIVER_MODULE(cxgb, cxgbc, cxgb_port_driver, cxgb_port_devclass, 0, 0);
MODULE_VERSION(cxgb, 1);

static struct mtx t3_list_lock;
static SLIST_HEAD(, adapter) t3_list;
#ifdef TCP_OFFLOAD
static struct mtx t3_uld_list_lock;
static SLIST_HEAD(, uld_info) t3_uld_list;
#endif

/*
 * The driver uses the best interrupt scheme available on a platform in the
 * order MSI-X, MSI, legacy pin interrupts.  This parameter determines which
 * of these schemes the driver may consider as follows:
 *
 * msi = 2: choose from among all three options
 * msi = 1 : only consider MSI and pin interrupts
 * msi = 0: force pin interrupts
 */
static int msi_allowed = 2;

SYSCTL_NODE(_hw, OID_AUTO, cxgb, CTLFLAG_RD, 0, "CXGB driver parameters");
SYSCTL_INT(_hw_cxgb, OID_AUTO, msi_allowed, CTLFLAG_RDTUN, &msi_allowed, 0,
    "MSI-X, MSI, INTx selector");

/*
 * The driver uses an auto-queue algorithm by default.
 * To disable it and force a single queue-set per port, use multiq = 0
 */
static int multiq = 1;
SYSCTL_INT(_hw_cxgb, OID_AUTO, multiq, CTLFLAG_RDTUN, &multiq, 0,
    "use min(ncpus/ports, 8) queue-sets per port");

/*
 * By default the driver will not update the firmware unless
 * it was compiled against a newer version
 *
 */
static int force_fw_update = 0;
SYSCTL_INT(_hw_cxgb, OID_AUTO, force_fw_update, CTLFLAG_RDTUN, &force_fw_update, 0,
    "update firmware even if up to date");

int cxgb_use_16k_clusters = -1;
SYSCTL_INT(_hw_cxgb, OID_AUTO, use_16k_clusters, CTLFLAG_RDTUN,
    &cxgb_use_16k_clusters, 0, "use 16kB clusters for the jumbo queue ");

static int nfilters = -1;
SYSCTL_INT(_hw_cxgb, OID_AUTO, nfilters, CTLFLAG_RDTUN,
    &nfilters, 0, "max number of entries in the filter table");

enum {
	MAX_TXQ_ENTRIES      = 16384,
	MAX_CTRL_TXQ_ENTRIES = 1024,
	MAX_RSPQ_ENTRIES     = 16384,
	MAX_RX_BUFFERS       = 16384,
	MAX_RX_JUMBO_BUFFERS = 16384,
	MIN_TXQ_ENTRIES      = 4,
	MIN_CTRL_TXQ_ENTRIES = 4,
	MIN_RSPQ_ENTRIES     = 32,
	MIN_FL_ENTRIES       = 32,
	MIN_FL_JUMBO_ENTRIES = 32
};

struct filter_info {
	u32 sip;
	u32 sip_mask;
	u32 dip;
	u16 sport;
	u16 dport;
	u32 vlan:12;
	u32 vlan_prio:3;
	u32 mac_hit:1;
	u32 mac_idx:4;
	u32 mac_vld:1;
	u32 pkt_type:2;
	u32 report_filter_id:1;
	u32 pass:1;
	u32 rss:1;
	u32 qset:3;
	u32 locked:1;
	u32 valid:1;
};

enum { FILTER_NO_VLAN_PRI = 7 };

#define EEPROM_MAGIC 0x38E2F10C

#define PORT_MASK ((1 << MAX_NPORTS) - 1)

/* Table for probing the cards.  The desc field isn't actually used */
struct cxgb_ident {
	uint16_t	vendor;
	uint16_t	device;
	int		index;
	char		*desc;
} cxgb_identifiers[] = {
	{PCI_VENDOR_ID_CHELSIO, 0x0020, 0, "PE9000"},
	{PCI_VENDOR_ID_CHELSIO, 0x0021, 1, "T302E"},
	{PCI_VENDOR_ID_CHELSIO, 0x0022, 2, "T310E"},
	{PCI_VENDOR_ID_CHELSIO, 0x0023, 3, "T320X"},
	{PCI_VENDOR_ID_CHELSIO, 0x0024, 1, "T302X"},
	{PCI_VENDOR_ID_CHELSIO, 0x0025, 3, "T320E"},
	{PCI_VENDOR_ID_CHELSIO, 0x0026, 2, "T310X"},
	{PCI_VENDOR_ID_CHELSIO, 0x0030, 2, "T3B10"},
	{PCI_VENDOR_ID_CHELSIO, 0x0031, 3, "T3B20"},
	{PCI_VENDOR_ID_CHELSIO, 0x0032, 1, "T3B02"},
	{PCI_VENDOR_ID_CHELSIO, 0x0033, 4, "T3B04"},
	{PCI_VENDOR_ID_CHELSIO, 0x0035, 6, "T3C10"},
	{PCI_VENDOR_ID_CHELSIO, 0x0036, 3, "S320E-CR"},
	{PCI_VENDOR_ID_CHELSIO, 0x0037, 7, "N320E-G2"},
	{0, 0, 0, NULL}
};

static int set_eeprom(struct port_info *pi, const uint8_t *data, int len, int offset);


static __inline char
t3rev2char(struct adapter *adapter)
{
	char rev = 'z';

	switch(adapter->params.rev) {
	case T3_REV_A:
		rev = 'a';
		break;
	case T3_REV_B:
	case T3_REV_B2:
		rev = 'b';
		break;
	case T3_REV_C:
		rev = 'c';
		break;
	}
	return rev;
}

static struct cxgb_ident *
cxgb_get_ident(device_t dev)
{
	struct cxgb_ident *id;

	for (id = cxgb_identifiers; id->desc != NULL; id++) {
		if ((id->vendor == pci_get_vendor(dev)) &&
		    (id->device == pci_get_device(dev))) {
			return (id);
		}
	}
	return (NULL);
}

static const struct adapter_info *
cxgb_get_adapter_info(device_t dev)
{
	struct cxgb_ident *id;
	const struct adapter_info *ai;

	id = cxgb_get_ident(dev);
	if (id == NULL)
		return (NULL);

	ai = t3_get_adapter_info(id->index);

	return (ai);
}

static int
cxgb_controller_probe(device_t dev)
{
	const struct adapter_info *ai;
	char *ports, buf[80];
	int nports;

	ai = cxgb_get_adapter_info(dev);
	if (ai == NULL)
		return (ENXIO);

	nports = ai->nports0 + ai->nports1;
	if (nports == 1)
		ports = "port";
	else
		ports = "ports";

	snprintf(buf, sizeof(buf), "%s, %d %s", ai->desc, nports, ports);
	device_set_desc_copy(dev, buf);
	return (BUS_PROBE_DEFAULT);
}

#define FW_FNAME "cxgb_t3fw"
#define TPEEPROM_NAME "cxgb_t3%c_tp_eeprom"
#define TPSRAM_NAME "cxgb_t3%c_protocol_sram"

static int
upgrade_fw(adapter_t *sc)
{
	const struct firmware *fw;
	int status;
	u32 vers;

	if ((fw = firmware_get(FW_FNAME)) == NULL)  {
		device_printf(sc->dev, "Could not find firmware image %s\n", FW_FNAME);
		return (ENOENT);
	} else
		device_printf(sc->dev, "installing firmware on card\n");
	status = t3_load_fw(sc, (const uint8_t *)fw->data, fw->datasize);

	if (status != 0) {
		device_printf(sc->dev, "failed to install firmware: %d\n",
		    status);
	} else {
		t3_get_fw_version(sc, &vers);
		snprintf(&sc->fw_version[0], sizeof(sc->fw_version), "%d.%d.%d",
		    G_FW_VERSION_MAJOR(vers), G_FW_VERSION_MINOR(vers),
		    G_FW_VERSION_MICRO(vers));
	}

	firmware_put(fw, FIRMWARE_UNLOAD);

	return (status);
}

/*
 * The cxgb_controller_attach function is responsible for the initial
 * bringup of the device.  Its responsibilities include:
 *
 *  1. Determine if the device supports MSI or MSI-X.
 *  2. Allocate bus resources so that we can access the Base Address Register
 *  3. Create and initialize mutexes for the controller and its control
 *     logic such as SGE and MDIO.
 *  4. Call hardware specific setup routine for the adapter as a whole.
 *  5. Allocate the BAR for doing MSI-X.
 *  6. Setup the line interrupt iff MSI-X is not supported.
 *  7. Create the driver's taskq.
 *  8. Start one task queue service thread.
 *  9. Check if the firmware and SRAM are up-to-date.  They will be
 *     auto-updated later (before FULL_INIT_DONE), if required.
 * 10. Create a child device for each MAC (port)
 * 11. Initialize T3 private state.
 * 12. Trigger the LED
 * 13. Setup offload iff supported.
 * 14. Reset/restart the tick callout.
 * 15. Attach sysctls
 *
 * NOTE: Any modification or deviation from this list MUST be reflected in
 * the above comment.  Failure to do so will result in problems on various
 * error conditions including link flapping.
 */
static int
cxgb_controller_attach(device_t dev)
{
	device_t child;
	const struct adapter_info *ai;
	struct adapter *sc;
	int i, error = 0;
	uint32_t vers;
	int port_qsets = 1;
	int msi_needed, reg;
	char buf[80];

	sc = device_get_softc(dev);
	sc->dev = dev;
	sc->msi_count = 0;
	ai = cxgb_get_adapter_info(dev);

	snprintf(sc->lockbuf, ADAPTER_LOCK_NAME_LEN, "cxgb controller lock %d",
	    device_get_unit(dev));
	ADAPTER_LOCK_INIT(sc, sc->lockbuf);

	snprintf(sc->reglockbuf, ADAPTER_LOCK_NAME_LEN, "SGE reg lock %d",
	    device_get_unit(dev));
	snprintf(sc->mdiolockbuf, ADAPTER_LOCK_NAME_LEN, "cxgb mdio lock %d",
	    device_get_unit(dev));
	snprintf(sc->elmerlockbuf, ADAPTER_LOCK_NAME_LEN, "cxgb elmer lock %d",
	    device_get_unit(dev));

	MTX_INIT(&sc->sge.reg_lock, sc->reglockbuf, NULL, MTX_SPIN);
	MTX_INIT(&sc->mdio_lock, sc->mdiolockbuf, NULL, MTX_DEF);
	MTX_INIT(&sc->elmer_lock, sc->elmerlockbuf, NULL, MTX_DEF);

	mtx_lock(&t3_list_lock);
	SLIST_INSERT_HEAD(&t3_list, sc, link);
	mtx_unlock(&t3_list_lock);

	/* find the PCIe link width and set max read request to 4KB*/
	if (pci_find_cap(dev, PCIY_EXPRESS, &reg) == 0) {
		uint16_t lnk;

		lnk = pci_read_config(dev, reg + PCIER_LINK_STA, 2);
		sc->link_width = (lnk & PCIEM_LINK_STA_WIDTH) >> 4;
		if (sc->link_width < 8 &&
		    (ai->caps & SUPPORTED_10000baseT_Full)) {
			device_printf(sc->dev,
			    "PCIe x%d Link, expect reduced performance\n",
			    sc->link_width);
		}

		pci_set_max_read_req(dev, 4096);
	}

	touch_bars(dev);
	pci_enable_busmaster(dev);
	/*
	 * Allocate the registers and make them available to the driver.
	 * The registers that we care about for NIC mode are in BAR 0
	 */
	sc->regs_rid = PCIR_BAR(0);
	if ((sc->regs_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY,
	    &sc->regs_rid, RF_ACTIVE)) == NULL) {
		device_printf(dev, "Cannot allocate BAR region 0\n");
		error = ENXIO;
		goto out;
	}

	sc->bt = rman_get_bustag(sc->regs_res);
	sc->bh = rman_get_bushandle(sc->regs_res);
	sc->mmio_len = rman_get_size(sc->regs_res);

	for (i = 0; i < MAX_NPORTS; i++)
		sc->port[i].adapter = sc;

	if (t3_prep_adapter(sc, ai, 1) < 0) {
		printf("prep adapter failed\n");
		error = ENODEV;
		goto out;
	}

	sc->udbs_rid = PCIR_BAR(2);
	sc->udbs_res = NULL;
	if (is_offload(sc) &&
	    ((sc->udbs_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY,
		   &sc->udbs_rid, RF_ACTIVE)) == NULL)) {
		device_printf(dev, "Cannot allocate BAR region 1\n");
		error = ENXIO;
		goto out;
	}

        /* Allocate the BAR for doing MSI-X.  If it succeeds, try to allocate
	 * enough messages for the queue sets.  If that fails, try falling
	 * back to MSI.  If that fails, then try falling back to the legacy
	 * interrupt pin model.
	 */
	sc->msix_regs_rid = 0x20;
	if ((msi_allowed >= 2) &&
	    (sc->msix_regs_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY,
	    &sc->msix_regs_rid, RF_ACTIVE)) != NULL) {

		if (multiq)
			port_qsets = min(SGE_QSETS/sc->params.nports, mp_ncpus);
		msi_needed = sc->msi_count = sc->params.nports * port_qsets + 1;

		if (pci_msix_count(dev) == 0 ||
		    (error = pci_alloc_msix(dev, &sc->msi_count)) != 0 ||
		    sc->msi_count != msi_needed) {
			device_printf(dev, "alloc msix failed - "
				      "msi_count=%d, msi_needed=%d, err=%d; "
				      "will try MSI\n", sc->msi_count,
				      msi_needed, error);
			sc->msi_count = 0;
			port_qsets = 1;
			pci_release_msi(dev);
			bus_release_resource(dev, SYS_RES_MEMORY,
			    sc->msix_regs_rid, sc->msix_regs_res);
			sc->msix_regs_res = NULL;
		} else {
			sc->flags |= USING_MSIX;
			sc->cxgb_intr = cxgb_async_intr;
			device_printf(dev,
				      "using MSI-X interrupts (%u vectors)\n",
				      sc->msi_count);
		}
	}

	if ((msi_allowed >= 1) && (sc->msi_count == 0)) {
		sc->msi_count = 1;
		if ((error = pci_alloc_msi(dev, &sc->msi_count)) != 0) {
			device_printf(dev, "alloc msi failed - "
				      "err=%d; will try INTx\n", error);
			sc->msi_count = 0;
			port_qsets = 1;
			pci_release_msi(dev);
		} else {
			sc->flags |= USING_MSI;
			sc->cxgb_intr = t3_intr_msi;
			device_printf(dev, "using MSI interrupts\n");
		}
	}
	if (sc->msi_count == 0) {
		device_printf(dev, "using line interrupts\n");
		sc->cxgb_intr = t3b_intr;
	}

	/* Create a private taskqueue thread for handling driver events */
	sc->tq = taskqueue_create("cxgb_taskq", M_NOWAIT,
	    taskqueue_thread_enqueue, &sc->tq);
	if (sc->tq == NULL) {
		device_printf(dev, "failed to allocate controller task queue\n");
		goto out;
	}

	taskqueue_start_threads(&sc->tq, 1, PI_NET, "%s taskq",
	    device_get_nameunit(dev));
	TASK_INIT(&sc->tick_task, 0, cxgb_tick_handler, sc);


	/* Create a periodic callout for checking adapter status */
	callout_init(&sc->cxgb_tick_ch, TRUE);

	if (t3_check_fw_version(sc) < 0 || force_fw_update) {
		/*
		 * Warn user that a firmware update will be attempted in init.
		 */
		device_printf(dev, "firmware needs to be updated to version %d.%d.%d\n",
		    FW_VERSION_MAJOR, FW_VERSION_MINOR, FW_VERSION_MICRO);
		sc->flags &= ~FW_UPTODATE;
	} else {
		sc->flags |= FW_UPTODATE;
	}

	if (t3_check_tpsram_version(sc) < 0) {
		/*
		 * Warn user that a firmware update will be attempted in init.
		 */
		device_printf(dev, "SRAM needs to be updated to version %c-%d.%d.%d\n",
		    t3rev2char(sc), TP_VERSION_MAJOR, TP_VERSION_MINOR, TP_VERSION_MICRO);
		sc->flags &= ~TPS_UPTODATE;
	} else {
		sc->flags |= TPS_UPTODATE;
	}

	/*
	 * Create a child device for each MAC.  The ethernet attachment
	 * will be done in these children.
	 */
	for (i = 0; i < (sc)->params.nports; i++) {
		struct port_info *pi;

		if ((child = device_add_child(dev, "cxgb", -1)) == NULL) {
			device_printf(dev, "failed to add child port\n");
			error = EINVAL;
			goto out;
		}
		pi = &sc->port[i];
		pi->adapter = sc;
		pi->nqsets = port_qsets;
		pi->first_qset = i*port_qsets;
		pi->port_id = i;
		pi->tx_chan = i >= ai->nports0;
		pi->txpkt_intf = pi->tx_chan ? 2 * (i - ai->nports0) + 1 : 2 * i;
		sc->rxpkt_map[pi->txpkt_intf] = i;
		sc->port[i].tx_chan = i >= ai->nports0;
		sc->portdev[i] = child;
		device_set_softc(child, pi);
	}
	if ((error = bus_generic_attach(dev)) != 0)
		goto out;

	/* initialize sge private state */
	t3_sge_init_adapter(sc);

	t3_led_ready(sc);

	error = t3_get_fw_version(sc, &vers);
	if (error)
		goto out;

	snprintf(&sc->fw_version[0], sizeof(sc->fw_version), "%d.%d.%d",
	    G_FW_VERSION_MAJOR(vers), G_FW_VERSION_MINOR(vers),
	    G_FW_VERSION_MICRO(vers));

	snprintf(buf, sizeof(buf), "%s %sNIC\t E/C: %s S/N: %s",
		 ai->desc, is_offload(sc) ? "R" : "",
		 sc->params.vpd.ec, sc->params.vpd.sn);
	device_set_desc_copy(dev, buf);

	snprintf(&sc->port_types[0], sizeof(sc->port_types), "%x%x%x%x",
		 sc->params.vpd.port_type[0], sc->params.vpd.port_type[1],
		 sc->params.vpd.port_type[2], sc->params.vpd.port_type[3]);

	device_printf(sc->dev, "Firmware Version %s\n", &sc->fw_version[0]);
	callout_reset(&sc->cxgb_tick_ch, hz, cxgb_tick, sc);
	t3_add_attach_sysctls(sc);

#ifdef TCP_OFFLOAD
	for (i = 0; i < NUM_CPL_HANDLERS; i++)
		sc->cpl_handler[i] = cpl_not_handled;
#endif

	t3_intr_clear(sc);
	error = cxgb_setup_interrupts(sc);
out:
	if (error)
		cxgb_free(sc);

	return (error);
}

/*
 * The cxgb_controller_detach routine is called with the device is
 * unloaded from the system.
 */

static int
cxgb_controller_detach(device_t dev)
{
	struct adapter *sc;

	sc = device_get_softc(dev);

	cxgb_free(sc);

	return (0);
}

/*
 * The cxgb_free() is called by the cxgb_controller_detach() routine
 * to tear down the structures that were built up in
 * cxgb_controller_attach(), and should be the final piece of work
 * done when fully unloading the driver.
 *
 *
 *  1. Shutting down the threads started by the cxgb_controller_attach()
 *     routine.
 *  2. Stopping the lower level device and all callouts (cxgb_down_locked()).
 *  3. Detaching all of the port devices created during the
 *     cxgb_controller_attach() routine.
 *  4. Removing the device children created via cxgb_controller_attach().
 *  5. Releasing PCI resources associated with the device.
 *  6. Turning off the offload support, iff it was turned on.
 *  7. Destroying the mutexes created in cxgb_controller_attach().
 *
 */
static void
cxgb_free(struct adapter *sc)
{
	int i, nqsets = 0;

	ADAPTER_LOCK(sc);
	sc->flags |= CXGB_SHUTDOWN;
	ADAPTER_UNLOCK(sc);

	/*
	 * Make sure all child devices are gone.
	 */
	bus_generic_detach(sc->dev);
	for (i = 0; i < (sc)->params.nports; i++) {
		if (sc->portdev[i] &&
		    device_delete_child(sc->dev, sc->portdev[i]) != 0)
			device_printf(sc->dev, "failed to delete child port\n");
		nqsets += sc->port[i].nqsets;
	}

	/*
	 * At this point, it is as if cxgb_port_detach has run on all ports, and
	 * cxgb_down has run on the adapter.  All interrupts have been silenced,
	 * all open devices have been closed.
	 */
	KASSERT(sc->open_device_map == 0, ("%s: device(s) still open (%x)",
					   __func__, sc->open_device_map));
	for (i = 0; i < sc->params.nports; i++) {
		KASSERT(sc->port[i].ifp == NULL, ("%s: port %i undead!",
						  __func__, i));
	}

	/*
	 * Finish off the adapter's callouts.
	 */
	callout_drain(&sc->cxgb_tick_ch);
	callout_drain(&sc->sge_timer_ch);

	/*
	 * Release resources grabbed under FULL_INIT_DONE by cxgb_up.  The
	 * sysctls are cleaned up by the kernel linker.
	 */
	if (sc->flags & FULL_INIT_DONE) {
 		t3_free_sge_resources(sc, nqsets);
 		sc->flags &= ~FULL_INIT_DONE;
 	}

	/*
	 * Release all interrupt resources.
	 */
	cxgb_teardown_interrupts(sc);
	if (sc->flags & (USING_MSI | USING_MSIX)) {
		device_printf(sc->dev, "releasing msi message(s)\n");
		pci_release_msi(sc->dev);
	} else {
		device_printf(sc->dev, "no msi message to release\n");
	}

	if (sc->msix_regs_res != NULL) {
		bus_release_resource(sc->dev, SYS_RES_MEMORY, sc->msix_regs_rid,
		    sc->msix_regs_res);
	}

	/*
	 * Free the adapter's taskqueue.
	 */
	if (sc->tq != NULL) {
		taskqueue_free(sc->tq);
		sc->tq = NULL;
	}

	free(sc->filters, M_DEVBUF);
	t3_sge_free(sc);

	if (sc->udbs_res != NULL)
		bus_release_resource(sc->dev, SYS_RES_MEMORY, sc->udbs_rid,
		    sc->udbs_res);

	if (sc->regs_res != NULL)
		bus_release_resource(sc->dev, SYS_RES_MEMORY, sc->regs_rid,
		    sc->regs_res);

	MTX_DESTROY(&sc->mdio_lock);
	MTX_DESTROY(&sc->sge.reg_lock);
	MTX_DESTROY(&sc->elmer_lock);
	mtx_lock(&t3_list_lock);
	SLIST_REMOVE(&t3_list, sc, adapter, link);
	mtx_unlock(&t3_list_lock);
	ADAPTER_LOCK_DEINIT(sc);
}

/**
 *	setup_sge_qsets - configure SGE Tx/Rx/response queues
 *	@sc: the controller softc
 *
 *	Determines how many sets of SGE queues to use and initializes them.
 *	We support multiple queue sets per port if we have MSI-X, otherwise
 *	just one queue set per port.
 */
static int
setup_sge_qsets(adapter_t *sc)
{
	int i, j, err, irq_idx = 0, qset_idx = 0;
	u_int ntxq = SGE_TXQ_PER_SET;

	if ((err = t3_sge_alloc(sc)) != 0) {
		device_printf(sc->dev, "t3_sge_alloc returned %d\n", err);
		return (err);
	}

	if (sc->params.rev > 0 && !(sc->flags & USING_MSI))
		irq_idx = -1;

	for (i = 0; i < (sc)->params.nports; i++) {
		struct port_info *pi = &sc->port[i];

		for (j = 0; j < pi->nqsets; j++, qset_idx++) {
			err = t3_sge_alloc_qset(sc, qset_idx, (sc)->params.nports,
			    (sc->flags & USING_MSIX) ? qset_idx + 1 : irq_idx,
			    &sc->params.sge.qset[qset_idx], ntxq, pi);
			if (err) {
				t3_free_sge_resources(sc, qset_idx);
				device_printf(sc->dev,
				    "t3_sge_alloc_qset failed with %d\n", err);
				return (err);
			}
		}
	}

	return (0);
}

static void
cxgb_teardown_interrupts(adapter_t *sc)
{
	int i;

	for (i = 0; i < SGE_QSETS; i++) {
		if (sc->msix_intr_tag[i] == NULL) {

			/* Should have been setup fully or not at all */
			KASSERT(sc->msix_irq_res[i] == NULL &&
				sc->msix_irq_rid[i] == 0,
				("%s: half-done interrupt (%d).", __func__, i));

			continue;
		}

		bus_teardown_intr(sc->dev, sc->msix_irq_res[i],
				  sc->msix_intr_tag[i]);
		bus_release_resource(sc->dev, SYS_RES_IRQ, sc->msix_irq_rid[i],
				     sc->msix_irq_res[i]);

		sc->msix_irq_res[i] = sc->msix_intr_tag[i] = NULL;
		sc->msix_irq_rid[i] = 0;
	}

	if (sc->intr_tag) {
		KASSERT(sc->irq_res != NULL,
			("%s: half-done interrupt.", __func__));

		bus_teardown_intr(sc->dev, sc->irq_res, sc->intr_tag);
		bus_release_resource(sc->dev, SYS_RES_IRQ, sc->irq_rid,
				     sc->irq_res);

		sc->irq_res = sc->intr_tag = NULL;
		sc->irq_rid = 0;
	}
}

static int
cxgb_setup_interrupts(adapter_t *sc)
{
	struct resource *res;
	void *tag;
	int i, rid, err, intr_flag = sc->flags & (USING_MSI | USING_MSIX);

	sc->irq_rid = intr_flag ? 1 : 0;
	sc->irq_res = bus_alloc_resource_any(sc->dev, SYS_RES_IRQ, &sc->irq_rid,
					     RF_SHAREABLE | RF_ACTIVE);
	if (sc->irq_res == NULL) {
		device_printf(sc->dev, "Cannot allocate interrupt (%x, %u)\n",
			      intr_flag, sc->irq_rid);
		err = EINVAL;
		sc->irq_rid = 0;
	} else {
		err = bus_setup_intr(sc->dev, sc->irq_res,
		    INTR_MPSAFE | INTR_TYPE_NET, NULL,
		    sc->cxgb_intr, sc, &sc->intr_tag);

		if (err) {
			device_printf(sc->dev,
				      "Cannot set up interrupt (%x, %u, %d)\n",
				      intr_flag, sc->irq_rid, err);
			bus_release_resource(sc->dev, SYS_RES_IRQ, sc->irq_rid,
					     sc->irq_res);
			sc->irq_res = sc->intr_tag = NULL;
			sc->irq_rid = 0;
		}
	}

	/* That's all for INTx or MSI */
	if (!(intr_flag & USING_MSIX) || err)
		return (err);

	bus_describe_intr(sc->dev, sc->irq_res, sc->intr_tag, "err");
	for (i = 0; i < sc->msi_count - 1; i++) {
		rid = i + 2;
		res = bus_alloc_resource_any(sc->dev, SYS_RES_IRQ, &rid,
					     RF_SHAREABLE | RF_ACTIVE);
		if (res == NULL) {
			device_printf(sc->dev, "Cannot allocate interrupt "
				      "for message %d\n", rid);
			err = EINVAL;
			break;
		}

		err = bus_setup_intr(sc->dev, res, INTR_MPSAFE | INTR_TYPE_NET,
				     NULL, t3_intr_msix, &sc->sge.qs[i], &tag);
		if (err) {
			device_printf(sc->dev, "Cannot set up interrupt "
				      "for message %d (%d)\n", rid, err);
			bus_release_resource(sc->dev, SYS_RES_IRQ, rid, res);
			break;
		}

		sc->msix_irq_rid[i] = rid;
		sc->msix_irq_res[i] = res;
		sc->msix_intr_tag[i] = tag;
		bus_describe_intr(sc->dev, res, tag, "qs%d", i);
	}

	if (err)
		cxgb_teardown_interrupts(sc);

	return (err);
}


static int
cxgb_port_probe(device_t dev)
{
	struct port_info *p;
	char buf[80];
	const char *desc;

	p = device_get_softc(dev);
	desc = p->phy.desc;
	snprintf(buf, sizeof(buf), "Port %d %s", p->port_id, desc);
	device_set_desc_copy(dev, buf);
	return (0);
}


static int
cxgb_makedev(struct port_info *pi)
{

	pi->port_cdev = make_dev(&cxgb_cdevsw, pi->ifp->if_dunit,
	    UID_ROOT, GID_WHEEL, 0600, "%s", if_name(pi->ifp));

	if (pi->port_cdev == NULL)
		return (ENOMEM);

	pi->port_cdev->si_drv1 = (void *)pi;

	return (0);
}

#define CXGB_CAP (IFCAP_VLAN_HWTAGGING | IFCAP_VLAN_MTU | IFCAP_HWCSUM | \
    IFCAP_VLAN_HWCSUM | IFCAP_TSO | IFCAP_JUMBO_MTU | IFCAP_LRO | \
    IFCAP_VLAN_HWTSO | IFCAP_LINKSTATE | IFCAP_HWCSUM_IPV6)
#define CXGB_CAP_ENABLE CXGB_CAP

static int
cxgb_port_attach(device_t dev)
{
	struct port_info *p;
	struct ifnet *ifp;
	int err;
	struct adapter *sc;

	p = device_get_softc(dev);
	sc = p->adapter;
	snprintf(p->lockbuf, PORT_NAME_LEN, "cxgb port lock %d:%d",
	    device_get_unit(device_get_parent(dev)), p->port_id);
	PORT_LOCK_INIT(p, p->lockbuf);

	callout_init(&p->link_check_ch, CALLOUT_MPSAFE);
	TASK_INIT(&p->link_check_task, 0, check_link_status, p);

	/* Allocate an ifnet object and set it up */
	ifp = p->ifp = if_alloc(IFT_ETHER);
	if (ifp == NULL) {
		device_printf(dev, "Cannot allocate ifnet\n");
		return (ENOMEM);
	}

	if_initname(ifp, device_get_name(dev), device_get_unit(dev));
	ifp->if_init = cxgb_init;
	ifp->if_softc = p;
	ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST;
	ifp->if_ioctl = cxgb_ioctl;
	ifp->if_transmit = cxgb_transmit;
	ifp->if_qflush = cxgb_qflush;
	ifp->if_get_counter = cxgb_get_counter;

	ifp->if_capabilities = CXGB_CAP;
#ifdef TCP_OFFLOAD
	if (is_offload(sc))
		ifp->if_capabilities |= IFCAP_TOE4;
#endif
	ifp->if_capenable = CXGB_CAP_ENABLE;
	ifp->if_hwassist = CSUM_TCP | CSUM_UDP | CSUM_IP | CSUM_TSO |
	    CSUM_UDP_IPV6 | CSUM_TCP_IPV6;

	/*
	 * Disable TSO on 4-port - it isn't supported by the firmware.
	 */
	if (sc->params.nports > 2) {
		ifp->if_capabilities &= ~(IFCAP_TSO | IFCAP_VLAN_HWTSO);
		ifp->if_capenable &= ~(IFCAP_TSO | IFCAP_VLAN_HWTSO);
		ifp->if_hwassist &= ~CSUM_TSO;
	}

	ether_ifattach(ifp, p->hw_addr);

#ifdef DEFAULT_JUMBO
	if (sc->params.nports <= 2)
		ifp->if_mtu = ETHERMTU_JUMBO;
#endif
	if ((err = cxgb_makedev(p)) != 0) {
		printf("makedev failed %d\n", err);
		return (err);
	}

	/* Create a list of media supported by this port */
	ifmedia_init(&p->media, IFM_IMASK, cxgb_media_change,
	    cxgb_media_status);
	cxgb_build_medialist(p);

	t3_sge_init_port(p);

	return (err);
}

/*
 * cxgb_port_detach() is called via the device_detach methods when
 * cxgb_free() calls the bus_generic_detach.  It is responsible for
 * removing the device from the view of the kernel, i.e. from all
 * interfaces lists etc.  This routine is only called when the driver is
 * being unloaded, not when the link goes down.
 */
static int
cxgb_port_detach(device_t dev)
{
	struct port_info *p;
	struct adapter *sc;
	int i;

	p = device_get_softc(dev);
	sc = p->adapter;

	/* Tell cxgb_ioctl and if_init that the port is going away */
	ADAPTER_LOCK(sc);
	SET_DOOMED(p);
	wakeup(&sc->flags);
	while (IS_BUSY(sc))
		mtx_sleep(&sc->flags, &sc->lock, 0, "cxgbdtch", 0);
	SET_BUSY(sc);
	ADAPTER_UNLOCK(sc);

	if (p->port_cdev != NULL)
		destroy_dev(p->port_cdev);

	cxgb_uninit_synchronized(p);
	ether_ifdetach(p->ifp);

	for (i = p->first_qset; i < p->first_qset + p->nqsets; i++) {
		struct sge_qset *qs = &sc->sge.qs[i];
		struct sge_txq *txq = &qs->txq[TXQ_ETH];

		callout_drain(&txq->txq_watchdog);
		callout_drain(&txq->txq_timer);
	}

	PORT_LOCK_DEINIT(p);
	if_free(p->ifp);
	p->ifp = NULL;

	ADAPTER_LOCK(sc);
	CLR_BUSY(sc);
	wakeup_one(&sc->flags);
	ADAPTER_UNLOCK(sc);
	return (0);
}

void
t3_fatal_err(struct adapter *sc)
{
	u_int fw_status[4];

	if (sc->flags & FULL_INIT_DONE) {
		t3_sge_stop(sc);
		t3_write_reg(sc, A_XGM_TX_CTRL, 0);
		t3_write_reg(sc, A_XGM_RX_CTRL, 0);
		t3_write_reg(sc, XGM_REG(A_XGM_TX_CTRL, 1), 0);
		t3_write_reg(sc, XGM_REG(A_XGM_RX_CTRL, 1), 0);
		t3_intr_disable(sc);
	}
	device_printf(sc->dev,"encountered fatal error, operation suspended\n");
	if (!t3_cim_ctl_blk_read(sc, 0xa0, 4, fw_status))
		device_printf(sc->dev, "FW_ status: 0x%x, 0x%x, 0x%x, 0x%x\n",
		    fw_status[0], fw_status[1], fw_status[2], fw_status[3]);
}

int
t3_os_find_pci_capability(adapter_t *sc, int cap)
{
	device_t dev;
	struct pci_devinfo *dinfo;
	pcicfgregs *cfg;
	uint32_t status;
	uint8_t ptr;

	dev = sc->dev;
	dinfo = device_get_ivars(dev);
	cfg = &dinfo->cfg;

	status = pci_read_config(dev, PCIR_STATUS, 2);
	if (!(status & PCIM_STATUS_CAPPRESENT))
		return (0);

	switch (cfg->hdrtype & PCIM_HDRTYPE) {
	case 0:
	case 1:
		ptr = PCIR_CAP_PTR;
		break;
	case 2:
		ptr = PCIR_CAP_PTR_2;
		break;
	default:
		return (0);
		break;
	}
	ptr = pci_read_config(dev, ptr, 1);

	while (ptr != 0) {
		if (pci_read_config(dev, ptr + PCICAP_ID, 1) == cap)
			return (ptr);
		ptr = pci_read_config(dev, ptr + PCICAP_NEXTPTR, 1);
	}

	return (0);
}

int
t3_os_pci_save_state(struct adapter *sc)
{
	device_t dev;
	struct pci_devinfo *dinfo;

	dev = sc->dev;
	dinfo = device_get_ivars(dev);

	pci_cfg_save(dev, dinfo, 0);
	return (0);
}

int
t3_os_pci_restore_state(struct adapter *sc)
{
	device_t dev;
	struct pci_devinfo *dinfo;

	dev = sc->dev;
	dinfo = device_get_ivars(dev);

	pci_cfg_restore(dev, dinfo);
	return (0);
}

/**
 *	t3_os_link_changed - handle link status changes
 *	@sc: the adapter associated with the link change
 *	@port_id: the port index whose link status has changed
 *	@link_status: the new status of the link
 *	@speed: the new speed setting
 *	@duplex: the new duplex setting
 *	@fc: the new flow-control setting
 *
 *	This is the OS-dependent handler for link status changes.  The OS
 *	neutral handler takes care of most of the processing for these events,
 *	then calls this handler for any OS-specific processing.
 */
void
t3_os_link_changed(adapter_t *adapter, int port_id, int link_status, int speed,
     int duplex, int fc, int mac_was_reset)
{
	struct port_info *pi = &adapter->port[port_id];
	struct ifnet *ifp = pi->ifp;

	/* no race with detach, so ifp should always be good */
	KASSERT(ifp, ("%s: if detached.", __func__));

	/* Reapply mac settings if they were lost due to a reset */
	if (mac_was_reset) {
		PORT_LOCK(pi);
		cxgb_update_mac_settings(pi);
		PORT_UNLOCK(pi);
	}

	if (link_status) {
		ifp->if_baudrate = IF_Mbps(speed);
		if_link_state_change(ifp, LINK_STATE_UP);
	} else
		if_link_state_change(ifp, LINK_STATE_DOWN);
}

/**
 *	t3_os_phymod_changed - handle PHY module changes
 *	@phy: the PHY reporting the module change
 *	@mod_type: new module type
 *
 *	This is the OS-dependent handler for PHY module changes.  It is
 *	invoked when a PHY module is removed or inserted for any OS-specific
 *	processing.
 */
void t3_os_phymod_changed(struct adapter *adap, int port_id)
{
	static const char *mod_str[] = {
		NULL, "SR", "LR", "LRM", "TWINAX", "TWINAX-L", "unknown"
	};
	struct port_info *pi = &adap->port[port_id];
	int mod = pi->phy.modtype;

	if (mod != pi->media.ifm_cur->ifm_data)
		cxgb_build_medialist(pi);

	if (mod == phy_modtype_none)
		if_printf(pi->ifp, "PHY module unplugged\n");
	else {
		KASSERT(mod < ARRAY_SIZE(mod_str),
			("invalid PHY module type %d", mod));
		if_printf(pi->ifp, "%s PHY module inserted\n", mod_str[mod]);
	}
}

void
t3_os_set_hw_addr(adapter_t *adapter, int port_idx, u8 hw_addr[])
{

	/*
	 * The ifnet might not be allocated before this gets called,
	 * as this is called early on in attach by t3_prep_adapter
	 * save the address off in the port structure
	 */
	if (cxgb_debug)
		printf("set_hw_addr on idx %d addr %6D\n", port_idx, hw_addr, ":");
	bcopy(hw_addr, adapter->port[port_idx].hw_addr, ETHER_ADDR_LEN);
}

/*
 * Programs the XGMAC based on the settings in the ifnet.  These settings
 * include MTU, MAC address, mcast addresses, etc.
 */
static void
cxgb_update_mac_settings(struct port_info *p)
{
	struct ifnet *ifp = p->ifp;
	struct t3_rx_mode rm;
	struct cmac *mac = &p->mac;
	int mtu, hwtagging;

	PORT_LOCK_ASSERT_OWNED(p);

	bcopy(IF_LLADDR(ifp), p->hw_addr, ETHER_ADDR_LEN);

	mtu = ifp->if_mtu;
	if (ifp->if_capenable & IFCAP_VLAN_MTU)
		mtu += ETHER_VLAN_ENCAP_LEN;

	hwtagging = (ifp->if_capenable & IFCAP_VLAN_HWTAGGING) != 0;

	t3_mac_set_mtu(mac, mtu);
	t3_set_vlan_accel(p->adapter, 1 << p->tx_chan, hwtagging);
	t3_mac_set_address(mac, 0, p->hw_addr);
	t3_init_rx_mode(&rm, p);
	t3_mac_set_rx_mode(mac, &rm);
}


static int
await_mgmt_replies(struct adapter *adap, unsigned long init_cnt,
			      unsigned long n)
{
	int attempts = 5;

	while (adap->sge.qs[0].rspq.offload_pkts < init_cnt + n) {
		if (!--attempts)
			return (ETIMEDOUT);
		t3_os_sleep(10);
	}
	return 0;
}

static int
init_tp_parity(struct adapter *adap)
{
	int i;
	struct mbuf *m;
	struct cpl_set_tcb_field *greq;
	unsigned long cnt = adap->sge.qs[0].rspq.offload_pkts;

	t3_tp_set_offload_mode(adap, 1);

	for (i = 0; i < 16; i++) {
		struct cpl_smt_write_req *req;

		m = m_gethdr(M_WAITOK, MT_DATA);
		req = mtod(m, struct cpl_smt_write_req *);
		m->m_len = m->m_pkthdr.len = sizeof(*req);
		memset(req, 0, sizeof(*req));
		req->wr.wrh_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD));
		OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SMT_WRITE_REQ, i));
		req->iff = i;
		t3_mgmt_tx(adap, m);
	}

	for (i = 0; i < 2048; i++) {
		struct cpl_l2t_write_req *req;

		m = m_gethdr(M_WAITOK, MT_DATA);
		req = mtod(m, struct cpl_l2t_write_req *);
		m->m_len = m->m_pkthdr.len = sizeof(*req);
		memset(req, 0, sizeof(*req));
		req->wr.wrh_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD));
		OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_L2T_WRITE_REQ, i));
		req->params = htonl(V_L2T_W_IDX(i));
		t3_mgmt_tx(adap, m);
	}

	for (i = 0; i < 2048; i++) {
		struct cpl_rte_write_req *req;

		m = m_gethdr(M_WAITOK, MT_DATA);
		req = mtod(m, struct cpl_rte_write_req *);
		m->m_len = m->m_pkthdr.len = sizeof(*req);
		memset(req, 0, sizeof(*req));
		req->wr.wrh_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD));
		OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_RTE_WRITE_REQ, i));
		req->l2t_idx = htonl(V_L2T_W_IDX(i));
		t3_mgmt_tx(adap, m);
	}

	m = m_gethdr(M_WAITOK, MT_DATA);
	greq = mtod(m, struct cpl_set_tcb_field *);
	m->m_len = m->m_pkthdr.len = sizeof(*greq);
	memset(greq, 0, sizeof(*greq));
	greq->wr.wrh_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD));
	OPCODE_TID(greq) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, 0));
	greq->mask = htobe64(1);
	t3_mgmt_tx(adap, m);

	i = await_mgmt_replies(adap, cnt, 16 + 2048 + 2048 + 1);
	t3_tp_set_offload_mode(adap, 0);
	return (i);
}

/**
 *	setup_rss - configure Receive Side Steering (per-queue connection demux)
 *	@adap: the adapter
 *
 *	Sets up RSS to distribute packets to multiple receive queues.  We
 *	configure the RSS CPU lookup table to distribute to the number of HW
 *	receive queues, and the response queue lookup table to narrow that
 *	down to the response queues actually configured for each port.
 *	We always configure the RSS mapping for two ports since the mapping
 *	table has plenty of entries.
 */
static void
setup_rss(adapter_t *adap)
{
	int i;
	u_int nq[2];
	uint8_t cpus[SGE_QSETS + 1];
	uint16_t rspq_map[RSS_TABLE_SIZE];

	for (i = 0; i < SGE_QSETS; ++i)
		cpus[i] = i;
	cpus[SGE_QSETS] = 0xff;

	nq[0] = nq[1] = 0;
	for_each_port(adap, i) {
		const struct port_info *pi = adap2pinfo(adap, i);

		nq[pi->tx_chan] += pi->nqsets;
	}
	for (i = 0; i < RSS_TABLE_SIZE / 2; ++i) {
		rspq_map[i] = nq[0] ? i % nq[0] : 0;
		rspq_map[i + RSS_TABLE_SIZE / 2] = nq[1] ? i % nq[1] + nq[0] : 0;
	}

	/* Calculate the reverse RSS map table */
	for (i = 0; i < SGE_QSETS; ++i)
		adap->rrss_map[i] = 0xff;
	for (i = 0; i < RSS_TABLE_SIZE; ++i)
		if (adap->rrss_map[rspq_map[i]] == 0xff)
			adap->rrss_map[rspq_map[i]] = i;

	t3_config_rss(adap, F_RQFEEDBACKENABLE | F_TNLLKPEN | F_TNLMAPEN |
		      F_TNLPRTEN | F_TNL2TUPEN | F_TNL4TUPEN | F_OFDMAPEN |
	              F_RRCPLMAPEN | V_RRCPLCPUSIZE(6) | F_HASHTOEPLITZ,
	              cpus, rspq_map);

}
static void
send_pktsched_cmd(struct adapter *adap, int sched, int qidx, int lo,
			      int hi, int port)
{
	struct mbuf *m;
	struct mngt_pktsched_wr *req;

	m = m_gethdr(M_NOWAIT, MT_DATA);
	if (m) {
		req = mtod(m, struct mngt_pktsched_wr *);
		req->wr.wrh_hi = htonl(V_WR_OP(FW_WROPCODE_MNGT));
		req->mngt_opcode = FW_MNGTOPCODE_PKTSCHED_SET;
		req->sched = sched;
		req->idx = qidx;
		req->min = lo;
		req->max = hi;
		req->binding = port;
		m->m_len = m->m_pkthdr.len = sizeof(*req);
		t3_mgmt_tx(adap, m);
	}
}

static void
bind_qsets(adapter_t *sc)
{
	int i, j;

	for (i = 0; i < (sc)->params.nports; ++i) {
		const struct port_info *pi = adap2pinfo(sc, i);

		for (j = 0; j < pi->nqsets; ++j) {
			send_pktsched_cmd(sc, 1, pi->first_qset + j, -1,
					  -1, pi->tx_chan);

		}
	}
}

static void
update_tpeeprom(struct adapter *adap)
{
	const struct firmware *tpeeprom;

	uint32_t version;
	unsigned int major, minor;
	int ret, len;
	char rev, name[32];

	t3_seeprom_read(adap, TP_SRAM_OFFSET, &version);

	major = G_TP_VERSION_MAJOR(version);
	minor = G_TP_VERSION_MINOR(version);
	if (major == TP_VERSION_MAJOR  && minor == TP_VERSION_MINOR)
		return;

	rev = t3rev2char(adap);
	snprintf(name, sizeof(name), TPEEPROM_NAME, rev);

	tpeeprom = firmware_get(name);
	if (tpeeprom == NULL) {
		device_printf(adap->dev,
			      "could not load TP EEPROM: unable to load %s\n",
			      name);
		return;
	}

	len = tpeeprom->datasize - 4;

	ret = t3_check_tpsram(adap, tpeeprom->data, tpeeprom->datasize);
	if (ret)
		goto release_tpeeprom;

	if (len != TP_SRAM_LEN) {
		device_printf(adap->dev,
			      "%s length is wrong len=%d expected=%d\n", name,
			      len, TP_SRAM_LEN);
		return;
	}

	ret = set_eeprom(&adap->port[0], tpeeprom->data, tpeeprom->datasize,
	    TP_SRAM_OFFSET);

	if (!ret) {
		device_printf(adap->dev,
			"Protocol SRAM image updated in EEPROM to %d.%d.%d\n",
			 TP_VERSION_MAJOR, TP_VERSION_MINOR, TP_VERSION_MICRO);
	} else
		device_printf(adap->dev,
			      "Protocol SRAM image update in EEPROM failed\n");

release_tpeeprom:
	firmware_put(tpeeprom, FIRMWARE_UNLOAD);

	return;
}

static int
update_tpsram(struct adapter *adap)
{
	const struct firmware *tpsram;
	int ret;
	char rev, name[32];

	rev = t3rev2char(adap);
	snprintf(name, sizeof(name), TPSRAM_NAME, rev);

	update_tpeeprom(adap);

	tpsram = firmware_get(name);
	if (tpsram == NULL){
		device_printf(adap->dev, "could not load TP SRAM\n");
		return (EINVAL);
	} else
		device_printf(adap->dev, "updating TP SRAM\n");

	ret = t3_check_tpsram(adap, tpsram->data, tpsram->datasize);
	if (ret)
		goto release_tpsram;

	ret = t3_set_proto_sram(adap, tpsram->data);
	if (ret)
		device_printf(adap->dev, "loading protocol SRAM failed\n");

release_tpsram:
	firmware_put(tpsram, FIRMWARE_UNLOAD);

	return ret;
}

/**
 *	cxgb_up - enable the adapter
 *	@adap: adapter being enabled
 *
 *	Called when the first port is enabled, this function performs the
 *	actions necessary to make an adapter operational, such as completing
 *	the initialization of HW modules, and enabling interrupts.
 */
static int
cxgb_up(struct adapter *sc)
{
	int err = 0;
	unsigned int mxf = t3_mc5_size(&sc->mc5) - MC5_MIN_TIDS;

	KASSERT(sc->open_device_map == 0, ("%s: device(s) already open (%x)",
					   __func__, sc->open_device_map));

	if ((sc->flags & FULL_INIT_DONE) == 0) {

		ADAPTER_LOCK_ASSERT_NOTOWNED(sc);

		if ((sc->flags & FW_UPTODATE) == 0)
			if ((err = upgrade_fw(sc)))
				goto out;

		if ((sc->flags & TPS_UPTODATE) == 0)
			if ((err = update_tpsram(sc)))
				goto out;

		if (is_offload(sc) && nfilters != 0) {
			sc->params.mc5.nservers = 0;

			if (nfilters < 0)
				sc->params.mc5.nfilters = mxf;
			else
				sc->params.mc5.nfilters = min(nfilters, mxf);
		}

		err = t3_init_hw(sc, 0);
		if (err)
			goto out;

		t3_set_reg_field(sc, A_TP_PARA_REG5, 0, F_RXDDPOFFINIT);
		t3_write_reg(sc, A_ULPRX_TDDP_PSZ, V_HPZ0(PAGE_SHIFT - 12));

		err = setup_sge_qsets(sc);
		if (err)
			goto out;

		alloc_filters(sc);
		setup_rss(sc);

		t3_add_configured_sysctls(sc);
		sc->flags |= FULL_INIT_DONE;
	}

	t3_intr_clear(sc);
	t3_sge_start(sc);
	t3_intr_enable(sc);

	if (sc->params.rev >= T3_REV_C && !(sc->flags & TP_PARITY_INIT) &&
	    is_offload(sc) && init_tp_parity(sc) == 0)
		sc->flags |= TP_PARITY_INIT;

	if (sc->flags & TP_PARITY_INIT) {
		t3_write_reg(sc, A_TP_INT_CAUSE, F_CMCACHEPERR | F_ARPLUTPERR);
		t3_write_reg(sc, A_TP_INT_ENABLE, 0x7fbfffff);
	}

	if (!(sc->flags & QUEUES_BOUND)) {
		bind_qsets(sc);
		setup_hw_filters(sc);
		sc->flags |= QUEUES_BOUND;
	}

	t3_sge_reset_adapter(sc);
out:
	return (err);
}

/*
 * Called when the last open device is closed.  Does NOT undo all of cxgb_up's
 * work.  Specifically, the resources grabbed under FULL_INIT_DONE are released
 * during controller_detach, not here.
 */
static void
cxgb_down(struct adapter *sc)
{
	t3_sge_stop(sc);
	t3_intr_disable(sc);
}

/*
 * if_init for cxgb ports.
 */
static void
cxgb_init(void *arg)
{
	struct port_info *p = arg;
	struct adapter *sc = p->adapter;

	ADAPTER_LOCK(sc);
	cxgb_init_locked(p); /* releases adapter lock */
	ADAPTER_LOCK_ASSERT_NOTOWNED(sc);
}

static int
cxgb_init_locked(struct port_info *p)
{
	struct adapter *sc = p->adapter;
	struct ifnet *ifp = p->ifp;
	struct cmac *mac = &p->mac;
	int i, rc = 0, may_sleep = 0, gave_up_lock = 0;

	ADAPTER_LOCK_ASSERT_OWNED(sc);

	while (!IS_DOOMED(p) && IS_BUSY(sc)) {
		gave_up_lock = 1;
		if (mtx_sleep(&sc->flags, &sc->lock, PCATCH, "cxgbinit", 0)) {
			rc = EINTR;
			goto done;
		}
	}
	if (IS_DOOMED(p)) {
		rc = ENXIO;
		goto done;
	}
	KASSERT(!IS_BUSY(sc), ("%s: controller busy.", __func__));

	/*
	 * The code that runs during one-time adapter initialization can sleep
	 * so it's important not to hold any locks across it.
	 */
	may_sleep = sc->flags & FULL_INIT_DONE ? 0 : 1;

	if (may_sleep) {
		SET_BUSY(sc);
		gave_up_lock = 1;
		ADAPTER_UNLOCK(sc);
	}

	if (sc->open_device_map == 0 && ((rc = cxgb_up(sc)) != 0))
			goto done;

	PORT_LOCK(p);
	if (isset(&sc->open_device_map, p->port_id) &&
	    (ifp->if_drv_flags & IFF_DRV_RUNNING)) {
		PORT_UNLOCK(p);
		goto done;
	}
	t3_port_intr_enable(sc, p->port_id);
	if (!mac->multiport)
		t3_mac_init(mac);
	cxgb_update_mac_settings(p);
	t3_link_start(&p->phy, mac, &p->link_config);
	t3_mac_enable(mac, MAC_DIRECTION_RX | MAC_DIRECTION_TX);
	ifp->if_drv_flags |= IFF_DRV_RUNNING;
	ifp->if_drv_flags &= ~IFF_DRV_OACTIVE;
	PORT_UNLOCK(p);

	for (i = p->first_qset; i < p->first_qset + p->nqsets; i++) {
		struct sge_qset *qs = &sc->sge.qs[i];
		struct sge_txq *txq = &qs->txq[TXQ_ETH];

		callout_reset_on(&txq->txq_watchdog, hz, cxgb_tx_watchdog, qs,
				 txq->txq_watchdog.c_cpu);
	}

	/* all ok */
	setbit(&sc->open_device_map, p->port_id);
	callout_reset(&p->link_check_ch,
	    p->phy.caps & SUPPORTED_LINK_IRQ ?  hz * 3 : hz / 4,
	    link_check_callout, p);

done:
	if (may_sleep) {
		ADAPTER_LOCK(sc);
		KASSERT(IS_BUSY(sc), ("%s: controller not busy.", __func__));
		CLR_BUSY(sc);
	}
	if (gave_up_lock)
		wakeup_one(&sc->flags);
	ADAPTER_UNLOCK(sc);
	return (rc);
}

static int
cxgb_uninit_locked(struct port_info *p)
{
	struct adapter *sc = p->adapter;
	int rc;

	ADAPTER_LOCK_ASSERT_OWNED(sc);

	while (!IS_DOOMED(p) && IS_BUSY(sc)) {
		if (mtx_sleep(&sc->flags, &sc->lock, PCATCH, "cxgbunin", 0)) {
			rc = EINTR;
			goto done;
		}
	}
	if (IS_DOOMED(p)) {
		rc = ENXIO;
		goto done;
	}
	KASSERT(!IS_BUSY(sc), ("%s: controller busy.", __func__));
	SET_BUSY(sc);
	ADAPTER_UNLOCK(sc);

	rc = cxgb_uninit_synchronized(p);

	ADAPTER_LOCK(sc);
	KASSERT(IS_BUSY(sc), ("%s: controller not busy.", __func__));
	CLR_BUSY(sc);
	wakeup_one(&sc->flags);
done:
	ADAPTER_UNLOCK(sc);
	return (rc);
}

/*
 * Called on "ifconfig down", and from port_detach
 */
static int
cxgb_uninit_synchronized(struct port_info *pi)
{
	struct adapter *sc = pi->adapter;
	struct ifnet *ifp = pi->ifp;

	/*
	 * taskqueue_drain may cause a deadlock if the adapter lock is held.
	 */
	ADAPTER_LOCK_ASSERT_NOTOWNED(sc);

	/*
	 * Clear this port's bit from the open device map, and then drain all
	 * the tasks that can access/manipulate this port's port_info or ifp.
	 * We disable this port's interrupts here and so the slow/ext
	 * interrupt tasks won't be enqueued.  The tick task will continue to
	 * be enqueued every second but the runs after this drain will not see
	 * this port in the open device map.
	 *
	 * A well behaved task must take open_device_map into account and ignore
	 * ports that are not open.
	 */
	clrbit(&sc->open_device_map, pi->port_id);
	t3_port_intr_disable(sc, pi->port_id);
	taskqueue_drain(sc->tq, &sc->slow_intr_task);
	taskqueue_drain(sc->tq, &sc->tick_task);

	callout_drain(&pi->link_check_ch);
	taskqueue_drain(sc->tq, &pi->link_check_task);

	PORT_LOCK(pi);
	ifp->if_drv_flags &= ~(IFF_DRV_RUNNING | IFF_DRV_OACTIVE);

	/* disable pause frames */
	t3_set_reg_field(sc, A_XGM_TX_CFG + pi->mac.offset, F_TXPAUSEEN, 0);

	/* Reset RX FIFO HWM */
	t3_set_reg_field(sc, A_XGM_RXFIFO_CFG +  pi->mac.offset,
			 V_RXFIFOPAUSEHWM(M_RXFIFOPAUSEHWM), 0);

	DELAY(100 * 1000);

	/* Wait for TXFIFO empty */
	t3_wait_op_done(sc, A_XGM_TXFIFO_CFG + pi->mac.offset,
			F_TXFIFO_EMPTY, 1, 20, 5);

	DELAY(100 * 1000);
	t3_mac_disable(&pi->mac, MAC_DIRECTION_RX);

	pi->phy.ops->power_down(&pi->phy, 1);

	PORT_UNLOCK(pi);

	pi->link_config.link_ok = 0;
	t3_os_link_changed(sc, pi->port_id, 0, 0, 0, 0, 0);

	if (sc->open_device_map == 0)
		cxgb_down(pi->adapter);

	return (0);
}

/*
 * Mark lro enabled or disabled in all qsets for this port
 */
static int
cxgb_set_lro(struct port_info *p, int enabled)
{
	int i;
	struct adapter *adp = p->adapter;
	struct sge_qset *q;

	for (i = 0; i < p->nqsets; i++) {
		q = &adp->sge.qs[p->first_qset + i];
		q->lro.enabled = (enabled != 0);
	}
	return (0);
}

static int
cxgb_ioctl(struct ifnet *ifp, unsigned long command, caddr_t data)
{
	struct port_info *p = ifp->if_softc;
	struct adapter *sc = p->adapter;
	struct ifreq *ifr = (struct ifreq *)data;
	int flags, error = 0, mtu;
	uint32_t mask;

	switch (command) {
	case SIOCSIFMTU:
		ADAPTER_LOCK(sc);
		error = IS_DOOMED(p) ? ENXIO : (IS_BUSY(sc) ? EBUSY : 0);
		if (error) {
fail:
			ADAPTER_UNLOCK(sc);
			return (error);
		}

		mtu = ifr->ifr_mtu;
		if ((mtu < ETHERMIN) || (mtu > ETHERMTU_JUMBO)) {
			error = EINVAL;
		} else {
			ifp->if_mtu = mtu;
			PORT_LOCK(p);
			cxgb_update_mac_settings(p);
			PORT_UNLOCK(p);
		}
		ADAPTER_UNLOCK(sc);
		break;
	case SIOCSIFFLAGS:
		ADAPTER_LOCK(sc);
		if (IS_DOOMED(p)) {
			error = ENXIO;
			goto fail;
		}
		if (ifp->if_flags & IFF_UP) {
			if (ifp->if_drv_flags & IFF_DRV_RUNNING) {
				flags = p->if_flags;
				if (((ifp->if_flags ^ flags) & IFF_PROMISC) ||
				    ((ifp->if_flags ^ flags) & IFF_ALLMULTI)) {
					if (IS_BUSY(sc)) {
						error = EBUSY;
						goto fail;
					}
					PORT_LOCK(p);
					cxgb_update_mac_settings(p);
					PORT_UNLOCK(p);
				}
				ADAPTER_UNLOCK(sc);
			} else
				error = cxgb_init_locked(p);
			p->if_flags = ifp->if_flags;
		} else if (ifp->if_drv_flags & IFF_DRV_RUNNING)
			error = cxgb_uninit_locked(p);
		else
			ADAPTER_UNLOCK(sc);

		ADAPTER_LOCK_ASSERT_NOTOWNED(sc);
		break;
	case SIOCADDMULTI:
	case SIOCDELMULTI:
		ADAPTER_LOCK(sc);
		error = IS_DOOMED(p) ? ENXIO : (IS_BUSY(sc) ? EBUSY : 0);
		if (error)
			goto fail;

		if (ifp->if_drv_flags & IFF_DRV_RUNNING) {
			PORT_LOCK(p);
			cxgb_update_mac_settings(p);
			PORT_UNLOCK(p);
		}
		ADAPTER_UNLOCK(sc);

		break;
	case SIOCSIFCAP:
		ADAPTER_LOCK(sc);
		error = IS_DOOMED(p) ? ENXIO : (IS_BUSY(sc) ? EBUSY : 0);
		if (error)
			goto fail;

		mask = ifr->ifr_reqcap ^ ifp->if_capenable;
		if (mask & IFCAP_TXCSUM) {
			ifp->if_capenable ^= IFCAP_TXCSUM;
			ifp->if_hwassist ^= (CSUM_TCP | CSUM_UDP | CSUM_IP);

			if (IFCAP_TSO4 & ifp->if_capenable &&
			    !(IFCAP_TXCSUM & ifp->if_capenable)) {
				ifp->if_capenable &= ~IFCAP_TSO4;
				if_printf(ifp,
				    "tso4 disabled due to -txcsum.\n");
			}
		}
		if (mask & IFCAP_TXCSUM_IPV6) {
			ifp->if_capenable ^= IFCAP_TXCSUM_IPV6;
			ifp->if_hwassist ^= (CSUM_UDP_IPV6 | CSUM_TCP_IPV6);

			if (IFCAP_TSO6 & ifp->if_capenable &&
			    !(IFCAP_TXCSUM_IPV6 & ifp->if_capenable)) {
				ifp->if_capenable &= ~IFCAP_TSO6;
				if_printf(ifp,
				    "tso6 disabled due to -txcsum6.\n");
			}
		}
		if (mask & IFCAP_RXCSUM)
			ifp->if_capenable ^= IFCAP_RXCSUM;
		if (mask & IFCAP_RXCSUM_IPV6)
			ifp->if_capenable ^= IFCAP_RXCSUM_IPV6;

		/*
		 * Note that we leave CSUM_TSO alone (it is always set).  The
		 * kernel takes both IFCAP_TSOx and CSUM_TSO into account before
		 * sending a TSO request our way, so it's sufficient to toggle
		 * IFCAP_TSOx only.
		 */
		if (mask & IFCAP_TSO4) {
			if (!(IFCAP_TSO4 & ifp->if_capenable) &&
			    !(IFCAP_TXCSUM & ifp->if_capenable)) {
				if_printf(ifp, "enable txcsum first.\n");
				error = EAGAIN;
				goto fail;
			}
			ifp->if_capenable ^= IFCAP_TSO4;
		}
		if (mask & IFCAP_TSO6) {
			if (!(IFCAP_TSO6 & ifp->if_capenable) &&
			    !(IFCAP_TXCSUM_IPV6 & ifp->if_capenable)) {
				if_printf(ifp, "enable txcsum6 first.\n");
				error = EAGAIN;
				goto fail;
			}
			ifp->if_capenable ^= IFCAP_TSO6;
		}
		if (mask & IFCAP_LRO) {
			ifp->if_capenable ^= IFCAP_LRO;

			/* Safe to do this even if cxgb_up not called yet */
			cxgb_set_lro(p, ifp->if_capenable & IFCAP_LRO);
		}
#ifdef TCP_OFFLOAD
		if (mask & IFCAP_TOE4) {
			int enable = (ifp->if_capenable ^ mask) & IFCAP_TOE4;

			error = toe_capability(p, enable);
			if (error == 0)
				ifp->if_capenable ^= mask;
		}
#endif
		if (mask & IFCAP_VLAN_HWTAGGING) {
			ifp->if_capenable ^= IFCAP_VLAN_HWTAGGING;
			if (ifp->if_drv_flags & IFF_DRV_RUNNING) {
				PORT_LOCK(p);
				cxgb_update_mac_settings(p);
				PORT_UNLOCK(p);
			}
		}
		if (mask & IFCAP_VLAN_MTU) {
			ifp->if_capenable ^= IFCAP_VLAN_MTU;
			if (ifp->if_drv_flags & IFF_DRV_RUNNING) {
				PORT_LOCK(p);
				cxgb_update_mac_settings(p);
				PORT_UNLOCK(p);
			}
		}
		if (mask & IFCAP_VLAN_HWTSO)
			ifp->if_capenable ^= IFCAP_VLAN_HWTSO;
		if (mask & IFCAP_VLAN_HWCSUM)
			ifp->if_capenable ^= IFCAP_VLAN_HWCSUM;

#ifdef VLAN_CAPABILITIES
		VLAN_CAPABILITIES(ifp);
#endif
		ADAPTER_UNLOCK(sc);
		break;
	case SIOCSIFMEDIA:
	case SIOCGIFMEDIA:
		error = ifmedia_ioctl(ifp, ifr, &p->media, command);
		break;
	default:
		error = ether_ioctl(ifp, command, data);
	}

	return (error);
}

static int
cxgb_media_change(struct ifnet *ifp)
{
	return (EOPNOTSUPP);
}

/*
 * Translates phy->modtype to the correct Ethernet media subtype.
 */
static int
cxgb_ifm_type(int mod)
{
	switch (mod) {
	case phy_modtype_sr:
		return (IFM_10G_SR);
	case phy_modtype_lr:
		return (IFM_10G_LR);
	case phy_modtype_lrm:
		return (IFM_10G_LRM);
	case phy_modtype_twinax:
		return (IFM_10G_TWINAX);
	case phy_modtype_twinax_long:
		return (IFM_10G_TWINAX_LONG);
	case phy_modtype_none:
		return (IFM_NONE);
	case phy_modtype_unknown:
		return (IFM_UNKNOWN);
	}

	KASSERT(0, ("%s: modtype %d unknown", __func__, mod));
	return (IFM_UNKNOWN);
}

/*
 * Rebuilds the ifmedia list for this port, and sets the current media.
 */
static void
cxgb_build_medialist(struct port_info *p)
{
	struct cphy *phy = &p->phy;
	struct ifmedia *media = &p->media;
	int mod = phy->modtype;
	int m = IFM_ETHER | IFM_FDX;

	PORT_LOCK(p);

	ifmedia_removeall(media);
	if (phy->caps & SUPPORTED_TP && phy->caps & SUPPORTED_Autoneg) {
		/* Copper (RJ45) */

		if (phy->caps & SUPPORTED_10000baseT_Full)
			ifmedia_add(media, m | IFM_10G_T, mod, NULL);

		if (phy->caps & SUPPORTED_1000baseT_Full)
			ifmedia_add(media, m | IFM_1000_T, mod, NULL);

		if (phy->caps & SUPPORTED_100baseT_Full)
			ifmedia_add(media, m | IFM_100_TX, mod, NULL);

		if (phy->caps & SUPPORTED_10baseT_Full)
			ifmedia_add(media, m | IFM_10_T, mod, NULL);

		ifmedia_add(media, IFM_ETHER | IFM_AUTO, mod, NULL);
		ifmedia_set(media, IFM_ETHER | IFM_AUTO);

	} else if (phy->caps & SUPPORTED_TP) {
		/* Copper (CX4) */

		KASSERT(phy->caps & SUPPORTED_10000baseT_Full,
			("%s: unexpected cap 0x%x", __func__, phy->caps));

		ifmedia_add(media, m | IFM_10G_CX4, mod, NULL);
		ifmedia_set(media, m | IFM_10G_CX4);

	} else if (phy->caps & SUPPORTED_FIBRE &&
		   phy->caps & SUPPORTED_10000baseT_Full) {
		/* 10G optical (but includes SFP+ twinax) */

		m |= cxgb_ifm_type(mod);
		if (IFM_SUBTYPE(m) == IFM_NONE)
			m &= ~IFM_FDX;

		ifmedia_add(media, m, mod, NULL);
		ifmedia_set(media, m);

	} else if (phy->caps & SUPPORTED_FIBRE &&
		   phy->caps & SUPPORTED_1000baseT_Full) {
		/* 1G optical */

		/* XXX: Lie and claim to be SX, could actually be any 1G-X */
		ifmedia_add(media, m | IFM_1000_SX, mod, NULL);
		ifmedia_set(media, m | IFM_1000_SX);

	} else {
		KASSERT(0, ("%s: don't know how to handle 0x%x.", __func__,
			    phy->caps));
	}

	PORT_UNLOCK(p);
}

static void
cxgb_media_status(struct ifnet *ifp, struct ifmediareq *ifmr)
{
	struct port_info *p = ifp->if_softc;
	struct ifmedia_entry *cur = p->media.ifm_cur;
	int speed = p->link_config.speed;

	if (cur->ifm_data != p->phy.modtype) {
		cxgb_build_medialist(p);
		cur = p->media.ifm_cur;
	}

	ifmr->ifm_status = IFM_AVALID;
	if (!p->link_config.link_ok)
		return;

	ifmr->ifm_status |= IFM_ACTIVE;

	/*
	 * active and current will differ iff current media is autoselect.  That
	 * can happen only for copper RJ45.
	 */
	if (IFM_SUBTYPE(cur->ifm_media) != IFM_AUTO)
		return;
	KASSERT(p->phy.caps & SUPPORTED_TP && p->phy.caps & SUPPORTED_Autoneg,
		("%s: unexpected PHY caps 0x%x", __func__, p->phy.caps));

	ifmr->ifm_active = IFM_ETHER | IFM_FDX;
	if (speed == SPEED_10000)
		ifmr->ifm_active |= IFM_10G_T;
	else if (speed == SPEED_1000)
		ifmr->ifm_active |= IFM_1000_T;
	else if (speed == SPEED_100)
		ifmr->ifm_active |= IFM_100_TX;
	else if (speed == SPEED_10)
		ifmr->ifm_active |= IFM_10_T;
	else
		KASSERT(0, ("%s: link up but speed unknown (%u)", __func__,
			    speed));
}

static uint64_t
cxgb_get_counter(struct ifnet *ifp, ift_counter c)
{
	struct port_info *pi = ifp->if_softc;
	struct adapter *sc = pi->adapter;
	struct cmac *mac = &pi->mac;
	struct mac_stats *mstats = &mac->stats;

	cxgb_refresh_stats(pi);

	switch (c) {
	case IFCOUNTER_IPACKETS:
		return (mstats->rx_frames);

	case IFCOUNTER_IERRORS:
		return (mstats->rx_jabber + mstats->rx_data_errs +
		    mstats->rx_sequence_errs + mstats->rx_runt +
		    mstats->rx_too_long + mstats->rx_mac_internal_errs +
		    mstats->rx_short + mstats->rx_fcs_errs);

	case IFCOUNTER_OPACKETS:
		return (mstats->tx_frames);

	case IFCOUNTER_OERRORS:
		return (mstats->tx_excess_collisions + mstats->tx_underrun +
		    mstats->tx_len_errs + mstats->tx_mac_internal_errs +
		    mstats->tx_excess_deferral + mstats->tx_fcs_errs);

	case IFCOUNTER_COLLISIONS:
		return (mstats->tx_total_collisions);

	case IFCOUNTER_IBYTES:
		return (mstats->rx_octets);

	case IFCOUNTER_OBYTES:
		return (mstats->tx_octets);

	case IFCOUNTER_IMCASTS:
		return (mstats->rx_mcast_frames);

	case IFCOUNTER_OMCASTS:
		return (mstats->tx_mcast_frames);

	case IFCOUNTER_IQDROPS:
		return (mstats->rx_cong_drops);

	case IFCOUNTER_OQDROPS: {
		int i;
		uint64_t drops;

		drops = 0;
		if (sc->flags & FULL_INIT_DONE) {
			for (i = pi->first_qset; i < pi->first_qset + pi->nqsets; i++)
				drops += sc->sge.qs[i].txq[TXQ_ETH].txq_mr->br_drops;
		}

		return (drops);

	}

	default:
		return (if_get_counter_default(ifp, c));
	}
}

static void
cxgb_async_intr(void *data)
{
	adapter_t *sc = data;

	t3_write_reg(sc, A_PL_INT_ENABLE0, 0);
	(void) t3_read_reg(sc, A_PL_INT_ENABLE0);
	taskqueue_enqueue(sc->tq, &sc->slow_intr_task);
}

static void
link_check_callout(void *arg)
{
	struct port_info *pi = arg;
	struct adapter *sc = pi->adapter;

	if (!isset(&sc->open_device_map, pi->port_id))
		return;

	taskqueue_enqueue(sc->tq, &pi->link_check_task);
}

static void
check_link_status(void *arg, int pending)
{
	struct port_info *pi = arg;
	struct adapter *sc = pi->adapter;

	if (!isset(&sc->open_device_map, pi->port_id))
		return;

	t3_link_changed(sc, pi->port_id);

	if (pi->link_fault || !(pi->phy.caps & SUPPORTED_LINK_IRQ) ||
	    pi->link_config.link_ok == 0)
		callout_reset(&pi->link_check_ch, hz, link_check_callout, pi);
}

void
t3_os_link_intr(struct port_info *pi)
{
	/*
	 * Schedule a link check in the near future.  If the link is flapping
	 * rapidly we'll keep resetting the callout and delaying the check until
	 * things stabilize a bit.
	 */
	callout_reset(&pi->link_check_ch, hz / 4, link_check_callout, pi);
}

static void
check_t3b2_mac(struct adapter *sc)
{
	int i;

	if (sc->flags & CXGB_SHUTDOWN)
		return;

	for_each_port(sc, i) {
		struct port_info *p = &sc->port[i];
		int status;
#ifdef INVARIANTS
		struct ifnet *ifp = p->ifp;
#endif

		if (!isset(&sc->open_device_map, p->port_id) || p->link_fault ||
		    !p->link_config.link_ok)
			continue;

		KASSERT(ifp->if_drv_flags & IFF_DRV_RUNNING,
			("%s: state mismatch (drv_flags %x, device_map %x)",
			 __func__, ifp->if_drv_flags, sc->open_device_map));

		PORT_LOCK(p);
		status = t3b2_mac_watchdog_task(&p->mac);
		if (status == 1)
			p->mac.stats.num_toggled++;
		else if (status == 2) {
			struct cmac *mac = &p->mac;

			cxgb_update_mac_settings(p);
			t3_link_start(&p->phy, mac, &p->link_config);
			t3_mac_enable(mac, MAC_DIRECTION_RX | MAC_DIRECTION_TX);
			t3_port_intr_enable(sc, p->port_id);
			p->mac.stats.num_resets++;
		}
		PORT_UNLOCK(p);
	}
}

static void
cxgb_tick(void *arg)
{
	adapter_t *sc = (adapter_t *)arg;

	if (sc->flags & CXGB_SHUTDOWN)
		return;

	taskqueue_enqueue(sc->tq, &sc->tick_task);
	callout_reset(&sc->cxgb_tick_ch, hz, cxgb_tick, sc);
}

void
cxgb_refresh_stats(struct port_info *pi)
{
	struct timeval tv;
	const struct timeval interval = {0, 250000};    /* 250ms */

	getmicrotime(&tv);
	timevalsub(&tv, &interval);
	if (timevalcmp(&tv, &pi->last_refreshed, <))
		return;

	PORT_LOCK(pi);
	t3_mac_update_stats(&pi->mac);
	PORT_UNLOCK(pi);
	getmicrotime(&pi->last_refreshed);
}

static void
cxgb_tick_handler(void *arg, int count)
{
	adapter_t *sc = (adapter_t *)arg;
	const struct adapter_params *p = &sc->params;
	int i;
	uint32_t cause, reset;

	if (sc->flags & CXGB_SHUTDOWN || !(sc->flags & FULL_INIT_DONE))
		return;

	if (p->rev == T3_REV_B2 && p->nports < 4 && sc->open_device_map)
		check_t3b2_mac(sc);

	cause = t3_read_reg(sc, A_SG_INT_CAUSE) & (F_RSPQSTARVE | F_FLEMPTY);
	if (cause) {
		struct sge_qset *qs = &sc->sge.qs[0];
		uint32_t mask, v;

		v = t3_read_reg(sc, A_SG_RSPQ_FL_STATUS) & ~0xff00;

		mask = 1;
		for (i = 0; i < SGE_QSETS; i++) {
			if (v & mask)
				qs[i].rspq.starved++;
			mask <<= 1;
		}

		mask <<= SGE_QSETS; /* skip RSPQXDISABLED */

		for (i = 0; i < SGE_QSETS * 2; i++) {
			if (v & mask) {
				qs[i / 2].fl[i % 2].empty++;
			}
			mask <<= 1;
		}

		/* clear */
		t3_write_reg(sc, A_SG_RSPQ_FL_STATUS, v);
		t3_write_reg(sc, A_SG_INT_CAUSE, cause);
	}

	for (i = 0; i < sc->params.nports; i++) {
		struct port_info *pi = &sc->port[i];
		struct cmac *mac = &pi->mac;

		if (!isset(&sc->open_device_map, pi->port_id))
			continue;

		cxgb_refresh_stats(pi);

		if (mac->multiport)
			continue;

		/* Count rx fifo overflows, once per second */
		cause = t3_read_reg(sc, A_XGM_INT_CAUSE + mac->offset);
		reset = 0;
		if (cause & F_RXFIFO_OVERFLOW) {
			mac->stats.rx_fifo_ovfl++;
			reset |= F_RXFIFO_OVERFLOW;
		}
		t3_write_reg(sc, A_XGM_INT_CAUSE + mac->offset, reset);
	}
}

static void
touch_bars(device_t dev)
{
	/*
	 * Don't enable yet
	 */
#if !defined(__LP64__) && 0
	u32 v;

	pci_read_config_dword(pdev, PCI_BASE_ADDRESS_1, &v);
	pci_write_config_dword(pdev, PCI_BASE_ADDRESS_1, v);
	pci_read_config_dword(pdev, PCI_BASE_ADDRESS_3, &v);
	pci_write_config_dword(pdev, PCI_BASE_ADDRESS_3, v);
	pci_read_config_dword(pdev, PCI_BASE_ADDRESS_5, &v);
	pci_write_config_dword(pdev, PCI_BASE_ADDRESS_5, v);
#endif
}

static int
set_eeprom(struct port_info *pi, const uint8_t *data, int len, int offset)
{
	uint8_t *buf;
	int err = 0;
	u32 aligned_offset, aligned_len, *p;
	struct adapter *adapter = pi->adapter;


	aligned_offset = offset & ~3;
	aligned_len = (len + (offset & 3) + 3) & ~3;

	if (aligned_offset != offset || aligned_len != len) {
		buf = malloc(aligned_len, M_DEVBUF, M_WAITOK|M_ZERO);
		if (!buf)
			return (ENOMEM);
		err = t3_seeprom_read(adapter, aligned_offset, (u32 *)buf);
		if (!err && aligned_len > 4)
			err = t3_seeprom_read(adapter,
					      aligned_offset + aligned_len - 4,
					      (u32 *)&buf[aligned_len - 4]);
		if (err)
			goto out;
		memcpy(buf + (offset & 3), data, len);
	} else
		buf = (uint8_t *)(uintptr_t)data;

	err = t3_seeprom_wp(adapter, 0);
	if (err)
		goto out;

	for (p = (u32 *)buf; !err && aligned_len; aligned_len -= 4, p++) {
		err = t3_seeprom_write(adapter, aligned_offset, *p);
		aligned_offset += 4;
	}

	if (!err)
		err = t3_seeprom_wp(adapter, 1);
out:
	if (buf != data)
		free(buf, M_DEVBUF);
	return err;
}


static int
in_range(int val, int lo, int hi)
{
	return val < 0 || (val <= hi && val >= lo);
}

static int
cxgb_extension_open(struct cdev *dev, int flags, int fmp, struct thread *td)
{
       return (0);
}

static int
cxgb_extension_close(struct cdev *dev, int flags, int fmt, struct thread *td)
{
       return (0);
}

static int
cxgb_extension_ioctl(struct cdev *dev, unsigned long cmd, caddr_t data,
    int fflag, struct thread *td)
{
	int mmd, error = 0;
	struct port_info *pi = dev->si_drv1;
	adapter_t *sc = pi->adapter;

#ifdef PRIV_SUPPORTED
	if (priv_check(td, PRIV_DRIVER)) {
		if (cxgb_debug)
			printf("user does not have access to privileged ioctls\n");
		return (EPERM);
	}
#else
	if (suser(td)) {
		if (cxgb_debug)
			printf("user does not have access to privileged ioctls\n");
		return (EPERM);
	}
#endif

	switch (cmd) {
	case CHELSIO_GET_MIIREG: {
		uint32_t val;
		struct cphy *phy = &pi->phy;
		struct ch_mii_data *mid = (struct ch_mii_data *)data;

		if (!phy->mdio_read)
			return (EOPNOTSUPP);
		if (is_10G(sc)) {
			mmd = mid->phy_id >> 8;
			if (!mmd)
				mmd = MDIO_DEV_PCS;
			else if (mmd > MDIO_DEV_VEND2)
				return (EINVAL);

			error = phy->mdio_read(sc, mid->phy_id & 0x1f, mmd,
					     mid->reg_num, &val);
		} else
		        error = phy->mdio_read(sc, mid->phy_id & 0x1f, 0,
					     mid->reg_num & 0x1f, &val);
		if (error == 0)
			mid->val_out = val;
		break;
	}
	case CHELSIO_SET_MIIREG: {
		struct cphy *phy = &pi->phy;
		struct ch_mii_data *mid = (struct ch_mii_data *)data;

		if (!phy->mdio_write)
			return (EOPNOTSUPP);
		if (is_10G(sc)) {
			mmd = mid->phy_id >> 8;
			if (!mmd)
				mmd = MDIO_DEV_PCS;
			else if (mmd > MDIO_DEV_VEND2)
				return (EINVAL);

			error = phy->mdio_write(sc, mid->phy_id & 0x1f,
					      mmd, mid->reg_num, mid->val_in);
		} else
			error = phy->mdio_write(sc, mid->phy_id & 0x1f, 0,
					      mid->reg_num & 0x1f,
					      mid->val_in);
		break;
	}
	case CHELSIO_SETREG: {
		struct ch_reg *edata = (struct ch_reg *)data;
		if ((edata->addr & 0x3) != 0 || edata->addr >= sc->mmio_len)
			return (EFAULT);
		t3_write_reg(sc, edata->addr, edata->val);
		break;
	}
	case CHELSIO_GETREG: {
		struct ch_reg *edata = (struct ch_reg *)data;
		if ((edata->addr & 0x3) != 0 || edata->addr >= sc->mmio_len)
			return (EFAULT);
		edata->val = t3_read_reg(sc, edata->addr);
		break;
	}
	case CHELSIO_GET_SGE_CONTEXT: {
		struct ch_cntxt *ecntxt = (struct ch_cntxt *)data;
		mtx_lock_spin(&sc->sge.reg_lock);
		switch (ecntxt->cntxt_type) {
		case CNTXT_TYPE_EGRESS:
			error = -t3_sge_read_ecntxt(sc, ecntxt->cntxt_id,
			    ecntxt->data);
			break;
		case CNTXT_TYPE_FL:
			error = -t3_sge_read_fl(sc, ecntxt->cntxt_id,
			    ecntxt->data);
			break;
		case CNTXT_TYPE_RSP:
			error = -t3_sge_read_rspq(sc, ecntxt->cntxt_id,
			    ecntxt->data);
			break;
		case CNTXT_TYPE_CQ:
			error = -t3_sge_read_cq(sc, ecntxt->cntxt_id,
			    ecntxt->data);
			break;
		default:
			error = EINVAL;
			break;
		}
		mtx_unlock_spin(&sc->sge.reg_lock);
		break;
	}
	case CHELSIO_GET_SGE_DESC: {
		struct ch_desc *edesc = (struct ch_desc *)data;
		int ret;
		if (edesc->queue_num >= SGE_QSETS * 6)
			return (EINVAL);
		ret = t3_get_desc(&sc->sge.qs[edesc->queue_num / 6],
		    edesc->queue_num % 6, edesc->idx, edesc->data);
		if (ret < 0)
			return (EINVAL);
		edesc->size = ret;
		break;
	}
	case CHELSIO_GET_QSET_PARAMS: {
		struct qset_params *q;
		struct ch_qset_params *t = (struct ch_qset_params *)data;
		int q1 = pi->first_qset;
		int nqsets = pi->nqsets;
		int i;

		if (t->qset_idx >= nqsets)
			return EINVAL;

		i = q1 + t->qset_idx;
		q = &sc->params.sge.qset[i];
		t->rspq_size   = q->rspq_size;
		t->txq_size[0] = q->txq_size[0];
		t->txq_size[1] = q->txq_size[1];
		t->txq_size[2] = q->txq_size[2];
		t->fl_size[0]  = q->fl_size;
		t->fl_size[1]  = q->jumbo_size;
		t->polling     = q->polling;
		t->lro         = q->lro;
		t->intr_lat    = q->coalesce_usecs;
		t->cong_thres  = q->cong_thres;
		t->qnum        = i;

		if ((sc->flags & FULL_INIT_DONE) == 0)
			t->vector = 0;
		else if (sc->flags & USING_MSIX)
			t->vector = rman_get_start(sc->msix_irq_res[i]);
		else
			t->vector = rman_get_start(sc->irq_res);

		break;
	}
	case CHELSIO_GET_QSET_NUM: {
		struct ch_reg *edata = (struct ch_reg *)data;
		edata->val = pi->nqsets;
		break;
	}
	case CHELSIO_LOAD_FW: {
		uint8_t *fw_data;
		uint32_t vers;
		struct ch_mem_range *t = (struct ch_mem_range *)data;

		/*
		 * You're allowed to load a firmware only before FULL_INIT_DONE
		 *
		 * FW_UPTODATE is also set so the rest of the initialization
		 * will not overwrite what was loaded here.  This gives you the
		 * flexibility to load any firmware (and maybe shoot yourself in
		 * the foot).
		 */

		ADAPTER_LOCK(sc);
		if (sc->open_device_map || sc->flags & FULL_INIT_DONE) {
			ADAPTER_UNLOCK(sc);
			return (EBUSY);
		}

		fw_data = malloc(t->len, M_DEVBUF, M_NOWAIT);
		if (!fw_data)
			error = ENOMEM;
		else
			error = copyin(t->buf, fw_data, t->len);

		if (!error)
			error = -t3_load_fw(sc, fw_data, t->len);

		if (t3_get_fw_version(sc, &vers) == 0) {
			snprintf(&sc->fw_version[0], sizeof(sc->fw_version),
			    "%d.%d.%d", G_FW_VERSION_MAJOR(vers),
			    G_FW_VERSION_MINOR(vers), G_FW_VERSION_MICRO(vers));
		}

		if (!error)
			sc->flags |= FW_UPTODATE;

		free(fw_data, M_DEVBUF);
		ADAPTER_UNLOCK(sc);
		break;
	}
	case CHELSIO_LOAD_BOOT: {
		uint8_t *boot_data;
		struct ch_mem_range *t = (struct ch_mem_range *)data;

		boot_data = malloc(t->len, M_DEVBUF, M_NOWAIT);
		if (!boot_data)
			return ENOMEM;

		error = copyin(t->buf, boot_data, t->len);
		if (!error)
			error = -t3_load_boot(sc, boot_data, t->len);

		free(boot_data, M_DEVBUF);
		break;
	}
	case CHELSIO_GET_PM: {
		struct ch_pm *m = (struct ch_pm *)data;
		struct tp_params *p = &sc->params.tp;

		if (!is_offload(sc))
			return (EOPNOTSUPP);

		m->tx_pg_sz = p->tx_pg_size;
		m->tx_num_pg = p->tx_num_pgs;
		m->rx_pg_sz  = p->rx_pg_size;
		m->rx_num_pg = p->rx_num_pgs;
		m->pm_total  = p->pmtx_size + p->chan_rx_size * p->nchan;

		break;
	}
	case CHELSIO_SET_PM: {
		struct ch_pm *m = (struct ch_pm *)data;
		struct tp_params *p = &sc->params.tp;

		if (!is_offload(sc))
			return (EOPNOTSUPP);
		if (sc->flags & FULL_INIT_DONE)
			return (EBUSY);

		if (!m->rx_pg_sz || (m->rx_pg_sz & (m->rx_pg_sz - 1)) ||
		    !m->tx_pg_sz || (m->tx_pg_sz & (m->tx_pg_sz - 1)))
			return (EINVAL);	/* not power of 2 */
		if (!(m->rx_pg_sz & 0x14000))
			return (EINVAL);	/* not 16KB or 64KB */
		if (!(m->tx_pg_sz & 0x1554000))
			return (EINVAL);
		if (m->tx_num_pg == -1)
			m->tx_num_pg = p->tx_num_pgs;
		if (m->rx_num_pg == -1)
			m->rx_num_pg = p->rx_num_pgs;
		if (m->tx_num_pg % 24 || m->rx_num_pg % 24)
			return (EINVAL);
		if (m->rx_num_pg * m->rx_pg_sz > p->chan_rx_size ||
		    m->tx_num_pg * m->tx_pg_sz > p->chan_tx_size)
			return (EINVAL);

		p->rx_pg_size = m->rx_pg_sz;
		p->tx_pg_size = m->tx_pg_sz;
		p->rx_num_pgs = m->rx_num_pg;
		p->tx_num_pgs = m->tx_num_pg;
		break;
	}
	case CHELSIO_SETMTUTAB: {
		struct ch_mtus *m = (struct ch_mtus *)data;
		int i;

		if (!is_offload(sc))
			return (EOPNOTSUPP);
		if (offload_running(sc))
			return (EBUSY);
		if (m->nmtus != NMTUS)
			return (EINVAL);
		if (m->mtus[0] < 81)         /* accommodate SACK */
			return (EINVAL);

		/*
		 * MTUs must be in ascending order
		 */
		for (i = 1; i < NMTUS; ++i)
			if (m->mtus[i] < m->mtus[i - 1])
				return (EINVAL);

		memcpy(sc->params.mtus, m->mtus, sizeof(sc->params.mtus));
		break;
	}
	case CHELSIO_GETMTUTAB: {
		struct ch_mtus *m = (struct ch_mtus *)data;

		if (!is_offload(sc))
			return (EOPNOTSUPP);

		memcpy(m->mtus, sc->params.mtus, sizeof(m->mtus));
		m->nmtus = NMTUS;
		break;
	}
	case CHELSIO_GET_MEM: {
		struct ch_mem_range *t = (struct ch_mem_range *)data;
		struct mc7 *mem;
		uint8_t *useraddr;
		u64 buf[32];

		/*
		 * Use these to avoid modifying len/addr in the return
		 * struct
		 */
		uint32_t len = t->len, addr = t->addr;

		if (!is_offload(sc))
			return (EOPNOTSUPP);
		if (!(sc->flags & FULL_INIT_DONE))
			return (EIO);         /* need the memory controllers */
		if ((addr & 0x7) || (len & 0x7))
			return (EINVAL);
		if (t->mem_id == MEM_CM)
			mem = &sc->cm;
		else if (t->mem_id == MEM_PMRX)
			mem = &sc->pmrx;
		else if (t->mem_id == MEM_PMTX)
			mem = &sc->pmtx;
		else
			return (EINVAL);

		/*
		 * Version scheme:
		 * bits 0..9: chip version
		 * bits 10..15: chip revision
		 */
		t->version = 3 | (sc->params.rev << 10);

		/*
		 * Read 256 bytes at a time as len can be large and we don't
		 * want to use huge intermediate buffers.
		 */
		useraddr = (uint8_t *)t->buf;
		while (len) {
			unsigned int chunk = min(len, sizeof(buf));

			error = t3_mc7_bd_read(mem, addr / 8, chunk / 8, buf);
			if (error)
				return (-error);
			if (copyout(buf, useraddr, chunk))
				return (EFAULT);
			useraddr += chunk;
			addr += chunk;
			len -= chunk;
		}
		break;
	}
	case CHELSIO_READ_TCAM_WORD: {
		struct ch_tcam_word *t = (struct ch_tcam_word *)data;

		if (!is_offload(sc))
			return (EOPNOTSUPP);
		if (!(sc->flags & FULL_INIT_DONE))
			return (EIO);         /* need MC5 */
		return -t3_read_mc5_range(&sc->mc5, t->addr, 1, t->buf);
		break;
	}
	case CHELSIO_SET_TRACE_FILTER: {
		struct ch_trace *t = (struct ch_trace *)data;
		const struct trace_params *tp;

		tp = (const struct trace_params *)&t->sip;
		if (t->config_tx)
			t3_config_trace_filter(sc, tp, 0, t->invert_match,
					       t->trace_tx);
		if (t->config_rx)
			t3_config_trace_filter(sc, tp, 1, t->invert_match,
					       t->trace_rx);
		break;
	}
	case CHELSIO_SET_PKTSCHED: {
		struct ch_pktsched_params *p = (struct ch_pktsched_params *)data;
		if (sc->open_device_map == 0)
			return (EAGAIN);
		send_pktsched_cmd(sc, p->sched, p->idx, p->min, p->max,
		    p->binding);
		break;
	}
	case CHELSIO_IFCONF_GETREGS: {
		struct ch_ifconf_regs *regs = (struct ch_ifconf_regs *)data;
		int reglen = cxgb_get_regs_len();
		uint8_t *buf = malloc(reglen, M_DEVBUF, M_NOWAIT);
		if (buf == NULL) {
			return (ENOMEM);
		}
		if (regs->len > reglen)
			regs->len = reglen;
		else if (regs->len < reglen)
			error = ENOBUFS;

		if (!error) {
			cxgb_get_regs(sc, regs, buf);
			error = copyout(buf, regs->data, reglen);
		}
		free(buf, M_DEVBUF);

		break;
	}
	case CHELSIO_SET_HW_SCHED: {
		struct ch_hw_sched *t = (struct ch_hw_sched *)data;
		unsigned int ticks_per_usec = core_ticks_per_usec(sc);

		if ((sc->flags & FULL_INIT_DONE) == 0)
			return (EAGAIN);       /* need TP to be initialized */
		if (t->sched >= NTX_SCHED || !in_range(t->mode, 0, 1) ||
		    !in_range(t->channel, 0, 1) ||
		    !in_range(t->kbps, 0, 10000000) ||
		    !in_range(t->class_ipg, 0, 10000 * 65535 / ticks_per_usec) ||
		    !in_range(t->flow_ipg, 0,
			      dack_ticks_to_usec(sc, 0x7ff)))
			return (EINVAL);

		if (t->kbps >= 0) {
			error = t3_config_sched(sc, t->kbps, t->sched);
			if (error < 0)
				return (-error);
		}
		if (t->class_ipg >= 0)
			t3_set_sched_ipg(sc, t->sched, t->class_ipg);
		if (t->flow_ipg >= 0) {
			t->flow_ipg *= 1000;     /* us -> ns */
			t3_set_pace_tbl(sc, &t->flow_ipg, t->sched, 1);
		}
		if (t->mode >= 0) {
			int bit = 1 << (S_TX_MOD_TIMER_MODE + t->sched);

			t3_set_reg_field(sc, A_TP_TX_MOD_QUEUE_REQ_MAP,
					 bit, t->mode ? bit : 0);
		}
		if (t->channel >= 0)
			t3_set_reg_field(sc, A_TP_TX_MOD_QUEUE_REQ_MAP,
					 1 << t->sched, t->channel << t->sched);
		break;
	}
	case CHELSIO_GET_EEPROM: {
		int i;
		struct ch_eeprom *e = (struct ch_eeprom *)data;
		uint8_t *buf = malloc(EEPROMSIZE, M_DEVBUF, M_NOWAIT);

		if (buf == NULL) {
			return (ENOMEM);
		}
		e->magic = EEPROM_MAGIC;
		for (i = e->offset & ~3; !error && i < e->offset + e->len; i += 4)
			error = -t3_seeprom_read(sc, i, (uint32_t *)&buf[i]);

		if (!error)
			error = copyout(buf + e->offset, e->data, e->len);

		free(buf, M_DEVBUF);
		break;
	}
	case CHELSIO_CLEAR_STATS: {
		if (!(sc->flags & FULL_INIT_DONE))
			return EAGAIN;

		PORT_LOCK(pi);
		t3_mac_update_stats(&pi->mac);
		memset(&pi->mac.stats, 0, sizeof(pi->mac.stats));
		PORT_UNLOCK(pi);
		break;
	}
	case CHELSIO_GET_UP_LA: {
		struct ch_up_la *la = (struct ch_up_la *)data;
		uint8_t *buf = malloc(LA_BUFSIZE, M_DEVBUF, M_NOWAIT);
		if (buf == NULL) {
			return (ENOMEM);
		}
		if (la->bufsize < LA_BUFSIZE)
			error = ENOBUFS;

		if (!error)
			error = -t3_get_up_la(sc, &la->stopped, &la->idx,
					      &la->bufsize, buf);
		if (!error)
			error = copyout(buf, la->data, la->bufsize);

		free(buf, M_DEVBUF);
		break;
	}
	case CHELSIO_GET_UP_IOQS: {
		struct ch_up_ioqs *ioqs = (struct ch_up_ioqs *)data;
		uint8_t *buf = malloc(IOQS_BUFSIZE, M_DEVBUF, M_NOWAIT);
		uint32_t *v;

		if (buf == NULL) {
			return (ENOMEM);
		}
		if (ioqs->bufsize < IOQS_BUFSIZE)
			error = ENOBUFS;

		if (!error)
			error = -t3_get_up_ioqs(sc, &ioqs->bufsize, buf);

		if (!error) {
			v = (uint32_t *)buf;

			ioqs->ioq_rx_enable = *v++;
			ioqs->ioq_tx_enable = *v++;
			ioqs->ioq_rx_status = *v++;
			ioqs->ioq_tx_status = *v++;

			error = copyout(v, ioqs->data, ioqs->bufsize);
		}

		free(buf, M_DEVBUF);
		break;
	}
	case CHELSIO_SET_FILTER: {
		struct ch_filter *f = (struct ch_filter *)data;
		struct filter_info *p;
		unsigned int nfilters = sc->params.mc5.nfilters;

		if (!is_offload(sc))
			return (EOPNOTSUPP);	/* No TCAM */
		if (!(sc->flags & FULL_INIT_DONE))
			return (EAGAIN);	/* mc5 not setup yet */
		if (nfilters == 0)
			return (EBUSY);		/* TOE will use TCAM */

		/* sanity checks */
		if (f->filter_id >= nfilters ||
		    (f->val.dip && f->mask.dip != 0xffffffff) ||
		    (f->val.sport && f->mask.sport != 0xffff) ||
		    (f->val.dport && f->mask.dport != 0xffff) ||
		    (f->val.vlan && f->mask.vlan != 0xfff) ||
		    (f->val.vlan_prio &&
			f->mask.vlan_prio != FILTER_NO_VLAN_PRI) ||
		    (f->mac_addr_idx != 0xffff && f->mac_addr_idx > 15) ||
		    f->qset >= SGE_QSETS ||
		    sc->rrss_map[f->qset] >= RSS_TABLE_SIZE)
			return (EINVAL);

		/* Was allocated with M_WAITOK */
		KASSERT(sc->filters, ("filter table NULL\n"));

		p = &sc->filters[f->filter_id];
		if (p->locked)
			return (EPERM);

		bzero(p, sizeof(*p));
		p->sip = f->val.sip;
		p->sip_mask = f->mask.sip;
		p->dip = f->val.dip;
		p->sport = f->val.sport;
		p->dport = f->val.dport;
		p->vlan = f->mask.vlan ? f->val.vlan : 0xfff;
		p->vlan_prio = f->mask.vlan_prio ? (f->val.vlan_prio & 6) :
		    FILTER_NO_VLAN_PRI;
		p->mac_hit = f->mac_hit;
		p->mac_vld = f->mac_addr_idx != 0xffff;
		p->mac_idx = f->mac_addr_idx;
		p->pkt_type = f->proto;
		p->report_filter_id = f->want_filter_id;
		p->pass = f->pass;
		p->rss = f->rss;
		p->qset = f->qset;

		error = set_filter(sc, f->filter_id, p);
		if (error == 0)
			p->valid = 1;
		break;
	}
	case CHELSIO_DEL_FILTER: {
		struct ch_filter *f = (struct ch_filter *)data;
		struct filter_info *p;
		unsigned int nfilters = sc->params.mc5.nfilters;

		if (!is_offload(sc))
			return (EOPNOTSUPP);
		if (!(sc->flags & FULL_INIT_DONE))
			return (EAGAIN);
		if (nfilters == 0 || sc->filters == NULL)
			return (EINVAL);
		if (f->filter_id >= nfilters)
		       return (EINVAL);

		p = &sc->filters[f->filter_id];
		if (p->locked)
			return (EPERM);
		if (!p->valid)
			return (EFAULT); /* Read "Bad address" as "Bad index" */

		bzero(p, sizeof(*p));
		p->sip = p->sip_mask = 0xffffffff;
		p->vlan = 0xfff;
		p->vlan_prio = FILTER_NO_VLAN_PRI;
		p->pkt_type = 1;
		error = set_filter(sc, f->filter_id, p);
		break;
	}
	case CHELSIO_GET_FILTER: {
		struct ch_filter *f = (struct ch_filter *)data;
		struct filter_info *p;
		unsigned int i, nfilters = sc->params.mc5.nfilters;

		if (!is_offload(sc))
			return (EOPNOTSUPP);
		if (!(sc->flags & FULL_INIT_DONE))
			return (EAGAIN);
		if (nfilters == 0 || sc->filters == NULL)
			return (EINVAL);

		i = f->filter_id == 0xffffffff ? 0 : f->filter_id + 1;
		for (; i < nfilters; i++) {
			p = &sc->filters[i];
			if (!p->valid)
				continue;

			bzero(f, sizeof(*f));

			f->filter_id = i;
			f->val.sip = p->sip;
			f->mask.sip = p->sip_mask;
			f->val.dip = p->dip;
			f->mask.dip = p->dip ? 0xffffffff : 0;
			f->val.sport = p->sport;
			f->mask.sport = p->sport ? 0xffff : 0;
			f->val.dport = p->dport;
			f->mask.dport = p->dport ? 0xffff : 0;
			f->val.vlan = p->vlan == 0xfff ? 0 : p->vlan;
			f->mask.vlan = p->vlan == 0xfff ? 0 : 0xfff;
			f->val.vlan_prio = p->vlan_prio == FILTER_NO_VLAN_PRI ?
			    0 : p->vlan_prio;
			f->mask.vlan_prio = p->vlan_prio == FILTER_NO_VLAN_PRI ?
			    0 : FILTER_NO_VLAN_PRI;
			f->mac_hit = p->mac_hit;
			f->mac_addr_idx = p->mac_vld ? p->mac_idx : 0xffff;
			f->proto = p->pkt_type;
			f->want_filter_id = p->report_filter_id;
			f->pass = p->pass;
			f->rss = p->rss;
			f->qset = p->qset;

			break;
		}

		if (i == nfilters)
			f->filter_id = 0xffffffff;
		break;
	}
	default:
		return (EOPNOTSUPP);
		break;
	}

	return (error);
}

static __inline void
reg_block_dump(struct adapter *ap, uint8_t *buf, unsigned int start,
    unsigned int end)
{
	uint32_t *p = (uint32_t *)(buf + start);

	for ( ; start <= end; start += sizeof(uint32_t))
		*p++ = t3_read_reg(ap, start);
}

#define T3_REGMAP_SIZE (3 * 1024)
static int
cxgb_get_regs_len(void)
{
	return T3_REGMAP_SIZE;
}

static void
cxgb_get_regs(adapter_t *sc, struct ch_ifconf_regs *regs, uint8_t *buf)
{

	/*
	 * Version scheme:
	 * bits 0..9: chip version
	 * bits 10..15: chip revision
	 * bit 31: set for PCIe cards
	 */
	regs->version = 3 | (sc->params.rev << 10) | (is_pcie(sc) << 31);

	/*
	 * We skip the MAC statistics registers because they are clear-on-read.
	 * Also reading multi-register stats would need to synchronize with the
	 * periodic mac stats accumulation.  Hard to justify the complexity.
	 */
	memset(buf, 0, cxgb_get_regs_len());
	reg_block_dump(sc, buf, 0, A_SG_RSPQ_CREDIT_RETURN);
	reg_block_dump(sc, buf, A_SG_HI_DRB_HI_THRSH, A_ULPRX_PBL_ULIMIT);
	reg_block_dump(sc, buf, A_ULPTX_CONFIG, A_MPS_INT_CAUSE);
	reg_block_dump(sc, buf, A_CPL_SWITCH_CNTRL, A_CPL_MAP_TBL_DATA);
	reg_block_dump(sc, buf, A_SMB_GLOBAL_TIME_CFG, A_XGM_SERDES_STAT3);
	reg_block_dump(sc, buf, A_XGM_SERDES_STATUS0,
		       XGM_REG(A_XGM_SERDES_STAT3, 1));
	reg_block_dump(sc, buf, XGM_REG(A_XGM_SERDES_STATUS0, 1),
		       XGM_REG(A_XGM_RX_SPI4_SOP_EOP_CNT, 1));
}

static int
alloc_filters(struct adapter *sc)
{
	struct filter_info *p;
	unsigned int nfilters = sc->params.mc5.nfilters;

	if (nfilters == 0)
		return (0);

	p = malloc(sizeof(*p) * nfilters, M_DEVBUF, M_WAITOK | M_ZERO);
	sc->filters = p;

	p = &sc->filters[nfilters - 1];
	p->vlan = 0xfff;
	p->vlan_prio = FILTER_NO_VLAN_PRI;
	p->pass = p->rss = p->valid = p->locked = 1;

	return (0);
}

static int
setup_hw_filters(struct adapter *sc)
{
	int i, rc;
	unsigned int nfilters = sc->params.mc5.nfilters;

	if (!sc->filters)
		return (0);

	t3_enable_filters(sc);

	for (i = rc = 0; i < nfilters && !rc; i++) {
		if (sc->filters[i].locked)
			rc = set_filter(sc, i, &sc->filters[i]);
	}

	return (rc);
}

static int
set_filter(struct adapter *sc, int id, const struct filter_info *f)
{
	int len;
	struct mbuf *m;
	struct ulp_txpkt *txpkt;
	struct work_request_hdr *wr;
	struct cpl_pass_open_req *oreq;
	struct cpl_set_tcb_field *sreq;

	len = sizeof(*wr) + sizeof(*oreq) + 2 * sizeof(*sreq);
	KASSERT(len <= MHLEN, ("filter request too big for an mbuf"));

	id += t3_mc5_size(&sc->mc5) - sc->params.mc5.nroutes -
	      sc->params.mc5.nfilters;

	m = m_gethdr(M_WAITOK, MT_DATA);
	m->m_len = m->m_pkthdr.len = len;
	bzero(mtod(m, char *), len);

	wr = mtod(m, struct work_request_hdr *);
	wr->wrh_hi = htonl(V_WR_OP(FW_WROPCODE_BYPASS) | F_WR_ATOMIC);

	oreq = (struct cpl_pass_open_req *)(wr + 1);
	txpkt = (struct ulp_txpkt *)oreq;
	txpkt->cmd_dest = htonl(V_ULPTX_CMD(ULP_TXPKT));
	txpkt->len = htonl(V_ULPTX_NFLITS(sizeof(*oreq) / 8));
	OPCODE_TID(oreq) = htonl(MK_OPCODE_TID(CPL_PASS_OPEN_REQ, id));
	oreq->local_port = htons(f->dport);
	oreq->peer_port = htons(f->sport);
	oreq->local_ip = htonl(f->dip);
	oreq->peer_ip = htonl(f->sip);
	oreq->peer_netmask = htonl(f->sip_mask);
	oreq->opt0h = 0;
	oreq->opt0l = htonl(F_NO_OFFLOAD);
	oreq->opt1 = htonl(V_MAC_MATCH_VALID(f->mac_vld) |
			 V_CONN_POLICY(CPL_CONN_POLICY_FILTER) |
			 V_VLAN_PRI(f->vlan_prio >> 1) |
			 V_VLAN_PRI_VALID(f->vlan_prio != FILTER_NO_VLAN_PRI) |
			 V_PKT_TYPE(f->pkt_type) | V_OPT1_VLAN(f->vlan) |
			 V_MAC_MATCH(f->mac_idx | (f->mac_hit << 4)));

	sreq = (struct cpl_set_tcb_field *)(oreq + 1);
	set_tcb_field_ulp(sreq, id, 1, 0x1800808000ULL,
			  (f->report_filter_id << 15) | (1 << 23) |
			  ((u64)f->pass << 35) | ((u64)!f->rss << 36));
	set_tcb_field_ulp(sreq + 1, id, 0, 0xffffffff, (2 << 19) | 1);
	t3_mgmt_tx(sc, m);

	if (f->pass && !f->rss) {
		len = sizeof(*sreq);
		m = m_gethdr(M_WAITOK, MT_DATA);
		m->m_len = m->m_pkthdr.len = len;
		bzero(mtod(m, char *), len);
		sreq = mtod(m, struct cpl_set_tcb_field *);
		sreq->wr.wrh_hi = htonl(V_WR_OP(FW_WROPCODE_FORWARD));
		mk_set_tcb_field(sreq, id, 25, 0x3f80000,
				 (u64)sc->rrss_map[f->qset] << 19);
		t3_mgmt_tx(sc, m);
	}
	return 0;
}

static inline void
mk_set_tcb_field(struct cpl_set_tcb_field *req, unsigned int tid,
    unsigned int word, u64 mask, u64 val)
{
	OPCODE_TID(req) = htonl(MK_OPCODE_TID(CPL_SET_TCB_FIELD, tid));
	req->reply = V_NO_REPLY(1);
	req->cpu_idx = 0;
	req->word = htons(word);
	req->mask = htobe64(mask);
	req->val = htobe64(val);
}

static inline void
set_tcb_field_ulp(struct cpl_set_tcb_field *req, unsigned int tid,
    unsigned int word, u64 mask, u64 val)
{
	struct ulp_txpkt *txpkt = (struct ulp_txpkt *)req;

	txpkt->cmd_dest = htonl(V_ULPTX_CMD(ULP_TXPKT));
	txpkt->len = htonl(V_ULPTX_NFLITS(sizeof(*req) / 8));
	mk_set_tcb_field(req, tid, word, mask, val);
}

void
t3_iterate(void (*func)(struct adapter *, void *), void *arg)
{
	struct adapter *sc;

	mtx_lock(&t3_list_lock);
	SLIST_FOREACH(sc, &t3_list, link) {
		/*
		 * func should not make any assumptions about what state sc is
		 * in - the only guarantee is that sc->sc_lock is a valid lock.
		 */
		func(sc, arg);
	}
	mtx_unlock(&t3_list_lock);
}

#ifdef TCP_OFFLOAD
static int
toe_capability(struct port_info *pi, int enable)
{
	int rc;
	struct adapter *sc = pi->adapter;

	ADAPTER_LOCK_ASSERT_OWNED(sc);

	if (!is_offload(sc))
		return (ENODEV);

	if (enable) {
		if (!(sc->flags & FULL_INIT_DONE)) {
			log(LOG_WARNING,
			    "You must enable a cxgb interface first\n");
			return (EAGAIN);
		}

		if (isset(&sc->offload_map, pi->port_id))
			return (0);

		if (!(sc->flags & TOM_INIT_DONE)) {
			rc = t3_activate_uld(sc, ULD_TOM);
			if (rc == EAGAIN) {
				log(LOG_WARNING,
				    "You must kldload t3_tom.ko before trying "
				    "to enable TOE on a cxgb interface.\n");
			}
			if (rc != 0)
				return (rc);
			KASSERT(sc->tom_softc != NULL,
			    ("%s: TOM activated but softc NULL", __func__));
			KASSERT(sc->flags & TOM_INIT_DONE,
			    ("%s: TOM activated but flag not set", __func__));
		}

		setbit(&sc->offload_map, pi->port_id);

		/*
		 * XXX: Temporary code to allow iWARP to be enabled when TOE is
		 * enabled on any port.  Need to figure out how to enable,
		 * disable, load, and unload iWARP cleanly.
		 */
		if (!isset(&sc->offload_map, MAX_NPORTS) &&
		    t3_activate_uld(sc, ULD_IWARP) == 0)
			setbit(&sc->offload_map, MAX_NPORTS);
	} else {
		if (!isset(&sc->offload_map, pi->port_id))
			return (0);

		KASSERT(sc->flags & TOM_INIT_DONE,
		    ("%s: TOM never initialized?", __func__));
		clrbit(&sc->offload_map, pi->port_id);
	}

	return (0);
}

/*
 * Add an upper layer driver to the global list.
 */
int
t3_register_uld(struct uld_info *ui)
{
	int rc = 0;
	struct uld_info *u;

	mtx_lock(&t3_uld_list_lock);
	SLIST_FOREACH(u, &t3_uld_list, link) {
	    if (u->uld_id == ui->uld_id) {
		    rc = EEXIST;
		    goto done;
	    }
	}

	SLIST_INSERT_HEAD(&t3_uld_list, ui, link);
	ui->refcount = 0;
done:
	mtx_unlock(&t3_uld_list_lock);
	return (rc);
}

int
t3_unregister_uld(struct uld_info *ui)
{
	int rc = EINVAL;
	struct uld_info *u;

	mtx_lock(&t3_uld_list_lock);

	SLIST_FOREACH(u, &t3_uld_list, link) {
	    if (u == ui) {
		    if (ui->refcount > 0) {
			    rc = EBUSY;
			    goto done;
		    }

		    SLIST_REMOVE(&t3_uld_list, ui, uld_info, link);
		    rc = 0;
		    goto done;
	    }
	}
done:
	mtx_unlock(&t3_uld_list_lock);
	return (rc);
}

int
t3_activate_uld(struct adapter *sc, int id)
{
	int rc = EAGAIN;
	struct uld_info *ui;

	mtx_lock(&t3_uld_list_lock);

	SLIST_FOREACH(ui, &t3_uld_list, link) {
		if (ui->uld_id == id) {
			rc = ui->activate(sc);
			if (rc == 0)
				ui->refcount++;
			goto done;
		}
	}
done:
	mtx_unlock(&t3_uld_list_lock);

	return (rc);
}

int
t3_deactivate_uld(struct adapter *sc, int id)
{
	int rc = EINVAL;
	struct uld_info *ui;

	mtx_lock(&t3_uld_list_lock);

	SLIST_FOREACH(ui, &t3_uld_list, link) {
		if (ui->uld_id == id) {
			rc = ui->deactivate(sc);
			if (rc == 0)
				ui->refcount--;
			goto done;
		}
	}
done:
	mtx_unlock(&t3_uld_list_lock);

	return (rc);
}

static int
cpl_not_handled(struct sge_qset *qs __unused, struct rsp_desc *r __unused,
    struct mbuf *m)
{
	m_freem(m);
	return (EDOOFUS);
}

int
t3_register_cpl_handler(struct adapter *sc, int opcode, cpl_handler_t h)
{
	uintptr_t *loc, new;

	if (opcode >= NUM_CPL_HANDLERS)
		return (EINVAL);

	new = h ? (uintptr_t)h : (uintptr_t)cpl_not_handled;
	loc = (uintptr_t *) &sc->cpl_handler[opcode];
	atomic_store_rel_ptr(loc, new);

	return (0);
}
#endif

static int
cxgbc_mod_event(module_t mod, int cmd, void *arg)
{
	int rc = 0;

	switch (cmd) {
	case MOD_LOAD:
		mtx_init(&t3_list_lock, "T3 adapters", 0, MTX_DEF);
		SLIST_INIT(&t3_list);
#ifdef TCP_OFFLOAD
		mtx_init(&t3_uld_list_lock, "T3 ULDs", 0, MTX_DEF);
		SLIST_INIT(&t3_uld_list);
#endif
		break;

	case MOD_UNLOAD:
#ifdef TCP_OFFLOAD
		mtx_lock(&t3_uld_list_lock);
		if (!SLIST_EMPTY(&t3_uld_list)) {
			rc = EBUSY;
			mtx_unlock(&t3_uld_list_lock);
			break;
		}
		mtx_unlock(&t3_uld_list_lock);
		mtx_destroy(&t3_uld_list_lock);
#endif
		mtx_lock(&t3_list_lock);
		if (!SLIST_EMPTY(&t3_list)) {
			rc = EBUSY;
			mtx_unlock(&t3_list_lock);
			break;
		}
		mtx_unlock(&t3_list_lock);
		mtx_destroy(&t3_list_lock);
		break;
	}

	return (rc);
}