xref: /illumos-gate/usr/src/uts/common/io/cxgbe/t4nex/t4_nexus.c (revision d35eb49b13b481dcf2e0b66df3d6b2fad04f3572)

/*
 * This file and its contents are supplied under the terms of the
 * Common Development and Distribution License ("CDDL"), version 1.0.
 * You may only use this file in accordance with the terms of version
 * 1.0 of the CDDL.
 *
 * A full copy of the text of the CDDL should have accompanied this
 * source. A copy of the CDDL is also available via the Internet at
 * http://www.illumos.org/license/CDDL.
 */

/*
 * This file is part of the Chelsio T4 support code.
 *
 * Copyright (C) 2010-2013 Chelsio Communications.  All rights reserved.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the LICENSE file included in this
 * release for licensing terms and conditions.
 */

/*
 * Copyright 2025 Oxide Computer Company
 */

#include <sys/ddi.h>
#include <sys/sunddi.h>
#include <sys/sunndi.h>
#include <sys/modctl.h>
#include <sys/conf.h>
#include <sys/devops.h>
#include <sys/pci.h>
#include <sys/atomic.h>
#include <sys/types.h>
#include <sys/file.h>
#include <sys/errno.h>
#include <sys/open.h>
#include <sys/cred.h>
#include <sys/stat.h>
#include <sys/mkdev.h>
#include <sys/queue.h>
#include <sys/containerof.h>
#include <sys/sensors.h>
#include <sys/firmload.h>
#include <sys/mac_provider.h>
#include <sys/mac_ether.h>
#include <sys/vlan.h>

#include "common/common.h"
#include "common/t4_msg.h"
#include "common/t4_regs.h"
#include "common/t4_extra_regs.h"

static void *t4_soft_state;

static kmutex_t t4_adapter_list_lock;
static list_t t4_adapter_list;

struct intrs_and_queues {
	int intr_type;		/* DDI_INTR_TYPE_* */
	int nirq;		/* Number of vectors */
	int intr_fwd;		/* Interrupts forwarded */
	int ntxq10g;		/* # of NIC txq's for each 10G port */
	int nrxq10g;		/* # of NIC rxq's for each 10G port */
	int ntxq1g;		/* # of NIC txq's for each 1G port */
	int nrxq1g;		/* # of NIC rxq's for each 1G port */
};

static unsigned int getpf(struct adapter *sc);
static int prep_firmware(struct adapter *sc);
static int upload_config_file(struct adapter *sc, uint32_t *mt, uint32_t *ma);
static int partition_resources(struct adapter *sc);
static int adap__pre_init_tweaks(struct adapter *sc);
static int get_params__pre_init(struct adapter *sc);
static int get_params__post_init(struct adapter *sc);
static int set_params__post_init(struct adapter *);
static void t4_setup_adapter_memwin(struct adapter *sc);
static int validate_mt_off_len(struct adapter *, int, uint32_t, int,
    uint32_t *);
static uint32_t t4_position_memwin(struct adapter *, int, uint32_t);
static int init_driver_props(struct adapter *sc, struct driver_properties *p);
static int remove_extra_props(struct adapter *sc, int n10g, int n1g);
static int cfg_itype_and_nqueues(struct adapter *sc, int n10g, int n1g,
    struct intrs_and_queues *iaq);
static int add_child_node(struct adapter *sc, int idx);
static int remove_child_node(struct adapter *sc, int idx);
static kstat_t *setup_kstats(struct adapter *sc);
static kstat_t *setup_wc_kstats(struct adapter *);
static int update_wc_kstats(kstat_t *, int);
static int t4_port_full_uninit(struct port_info *);

static int t4_temperature_read(void *, sensor_ioctl_scalar_t *);
static int t4_voltage_read(void *, sensor_ioctl_scalar_t *);
static const ksensor_ops_t t4_temp_ops = {
	.kso_kind = ksensor_kind_temperature,
	.kso_scalar = t4_temperature_read
};

static const ksensor_ops_t t4_volt_ops = {
	.kso_kind = ksensor_kind_voltage,
	.kso_scalar = t4_voltage_read
};

static int t4_ufm_getcaps(ddi_ufm_handle_t *, void *, ddi_ufm_cap_t *);
static int t4_ufm_fill_image(ddi_ufm_handle_t *, void *, uint_t,
    ddi_ufm_image_t *);
static int t4_ufm_fill_slot(ddi_ufm_handle_t *, void *, uint_t, uint_t,
    ddi_ufm_slot_t *);
static ddi_ufm_ops_t t4_ufm_ops = {
	.ddi_ufm_op_fill_image = t4_ufm_fill_image,
	.ddi_ufm_op_fill_slot = t4_ufm_fill_slot,
	.ddi_ufm_op_getcaps = t4_ufm_getcaps
};

/* ARGSUSED */
static int
t4_devo_getinfo(dev_info_t *dip, ddi_info_cmd_t cmd, void *arg, void **rp)
{
	struct adapter *sc;
	minor_t minor;

	minor = getminor((dev_t)arg);	/* same as instance# in our case */

	if (cmd == DDI_INFO_DEVT2DEVINFO) {
		sc = ddi_get_soft_state(t4_soft_state, minor);
		if (sc == NULL)
			return (DDI_FAILURE);

		ASSERT(sc->dev == (dev_t)arg);
		*rp = (void *)sc->dip;
	} else if (cmd == DDI_INFO_DEVT2INSTANCE)
		*rp = (void *) (unsigned long) minor;
	else
		ASSERT(0);

	return (DDI_SUCCESS);
}

static int
t4_devo_probe(dev_info_t *dip)
{
	int rc, id, *reg;
	uint_t n, pf;

	id = ddi_prop_get_int(DDI_DEV_T_ANY, dip, DDI_PROP_DONTPASS,
	    "device-id", 0xffff);
	if (id == 0xffff)
		return (DDI_PROBE_DONTCARE);

	rc = ddi_prop_lookup_int_array(DDI_DEV_T_ANY, dip, DDI_PROP_DONTPASS,
	    "reg", &reg, &n);
	if (rc != DDI_SUCCESS)
		return (DDI_PROBE_DONTCARE);

	pf = PCI_REG_FUNC_G(reg[0]);
	ddi_prop_free(reg);

	/* Prevent driver attachment on any PF except 0 on the FPGA */
	if (id == 0xa000 && pf != 0)
		return (DDI_PROBE_FAILURE);

	return (DDI_PROBE_DONTCARE);
}

static int t4_devo_detach(dev_info_t *, ddi_detach_cmd_t);

static int
t4_devo_attach(dev_info_t *dip, ddi_attach_cmd_t cmd)
{
	struct adapter *sc = NULL;
	struct sge *s;
	int i, instance, rc = DDI_SUCCESS, rqidx, tqidx, q;
	int irq = 0, nxg = 0, n1g = 0;
	char name[16];
	struct driver_properties *prp;
	struct intrs_and_queues iaq;
	ddi_device_acc_attr_t da = {
		.devacc_attr_version = DDI_DEVICE_ATTR_V0,
		.devacc_attr_endian_flags = DDI_STRUCTURE_LE_ACC,
		.devacc_attr_dataorder = DDI_STRICTORDER_ACC
	};
	ddi_device_acc_attr_t da_bar2 = {
		.devacc_attr_version = DDI_DEVICE_ATTR_V0,
		.devacc_attr_endian_flags = DDI_STRUCTURE_LE_ACC,
		.devacc_attr_dataorder = DDI_STRICTORDER_ACC
	};

	if (cmd != DDI_ATTACH)
		return (DDI_FAILURE);

	/*
	 * Allocate space for soft state.
	 */
	instance = ddi_get_instance(dip);
	rc = ddi_soft_state_zalloc(t4_soft_state, instance);
	if (rc != DDI_SUCCESS) {
		cxgb_printf(dip, CE_WARN,
		    "failed to allocate soft state: %d", rc);
		return (DDI_FAILURE);
	}

	sc = ddi_get_soft_state(t4_soft_state, instance);
	sc->dip = dip;
	sc->dev = makedevice(ddi_driver_major(dip), instance);
	mutex_init(&sc->lock, NULL, MUTEX_DRIVER, NULL);
	cv_init(&sc->cv, NULL, CV_DRIVER, NULL);
	mutex_init(&sc->sfl_lock, NULL, MUTEX_DRIVER, NULL);
	TAILQ_INIT(&sc->sfl);
	mutex_init(&sc->mbox_lock, NULL, MUTEX_DRIVER, NULL);
	STAILQ_INIT(&sc->mbox_list);

	mutex_enter(&t4_adapter_list_lock);
	list_insert_tail(&t4_adapter_list, sc);
	mutex_exit(&t4_adapter_list_lock);

	sc->pf = getpf(sc);
	if (sc->pf > 8) {
		rc = EINVAL;
		cxgb_printf(dip, CE_WARN,
		    "failed to determine PCI PF# of device");
		goto done;
	}
	sc->mbox = sc->pf;

	/* Initialize the driver properties */
	prp = &sc->props;
	(void) init_driver_props(sc, prp);

	/*
	 * Enable access to the PCI config space.
	 */
	rc = pci_config_setup(dip, &sc->pci_regh);
	if (rc != DDI_SUCCESS) {
		cxgb_printf(dip, CE_WARN,
		    "failed to enable PCI config space access: %d", rc);
		goto done;
	}

	/* TODO: Set max read request to 4K */

	/*
	 * Enable BAR0 access.
	 */
	rc = ddi_regs_map_setup(dip, 1, &sc->regp, 0, 0, &da, &sc->regh);
	if (rc != DDI_SUCCESS) {
		cxgb_printf(dip, CE_WARN,
		    "failed to map device registers: %d", rc);
		goto done;
	}

	(void) memset(sc->chan_map, 0xff, sizeof (sc->chan_map));

	/*
	 * Prepare the adapter for operation.
	 */
	rc = -t4_prep_adapter(sc, false);
	if (rc != 0) {
		cxgb_printf(dip, CE_WARN, "failed to prepare adapter: %d", rc);
		goto done;
	}

	/*
	 * Enable BAR2 access.
	 */
	sc->doorbells |= DOORBELL_KDB;
	rc = ddi_regs_map_setup(dip, 2, &sc->bar2_ptr, 0, 0, &da_bar2,
	    &sc->bar2_hdl);
	if (rc != DDI_SUCCESS) {
		cxgb_printf(dip, CE_WARN,
		    "failed to map BAR2 device registers: %d", rc);
		goto done;
	} else {
		if (t4_cver_ge(sc, CHELSIO_T5)) {
			sc->doorbells |= DOORBELL_UDB;
			if (prp->wc) {
				/*
				 * Enable write combining on BAR2.  This is the
				 * userspace doorbell BAR and is split into 128B
				 * (UDBS_SEG_SIZE) doorbell regions, each
				 * associated with an egress queue.  The first
				 * 64B has the doorbell and the second 64B can
				 * be used to submit a tx work request with an
				 * implicit doorbell.
				 */
				sc->doorbells &= ~DOORBELL_UDB;
				sc->doorbells |= (DOORBELL_WCWR |
				    DOORBELL_UDBWC);

				const uint32_t stat_mode =
				    t4_cver_ge(sc, CHELSIO_T6) ?
				    V_T6_STATMODE(0) : V_STATMODE(0);
				t4_write_reg(sc, A_SGE_STAT_CFG,
				    V_STATSOURCE_T5(7) | stat_mode);
			}
		}
	}

	/*
	 * Do this really early.  Note that minor number = instance.
	 */
	(void) snprintf(name, sizeof (name), "%s,%d", T4_NEXUS_NAME, instance);
	rc = ddi_create_minor_node(dip, name, S_IFCHR, instance,
	    DDI_NT_NEXUS, 0);
	if (rc != DDI_SUCCESS) {
		cxgb_printf(dip, CE_WARN,
		    "failed to create device node: %d", rc);
		rc = DDI_SUCCESS; /* carry on */
	}

	/* Do this early. Memory window is required for loading config file. */
	t4_setup_adapter_memwin(sc);

	/* Prepare the firmware for operation */
	rc = prep_firmware(sc);
	if (rc != 0)
		goto done; /* error message displayed already */

	rc = adap__pre_init_tweaks(sc);
	if (rc != 0)
		goto done;

	rc = get_params__pre_init(sc);
	if (rc != 0)
		goto done; /* error message displayed already */

	t4_sge_init(sc);

	if (sc->flags & TAF_MASTER_PF) {
		/* get basic stuff going */
		rc = -t4_fw_initialize(sc, sc->mbox);
		if (rc != 0) {
			cxgb_printf(sc->dip, CE_WARN,
			    "early init failed: %d.\n", rc);
			goto done;
		}
	}

	rc = get_params__post_init(sc);
	if (rc != 0)
		goto done; /* error message displayed already */

	rc = set_params__post_init(sc);
	if (rc != 0)
		goto done; /* error message displayed already */

	/*
	 * TODO: This is the place to call t4_set_filter_mode()
	 */

	/* tweak some settings */
	t4_write_reg(sc, A_TP_SHIFT_CNT,
	    V_SYNSHIFTMAX(6) |
	    V_RXTSHIFTMAXR1(4) |
	    V_RXTSHIFTMAXR2(15) |
	    V_PERSHIFTBACKOFFMAX(8) |
	    V_PERSHIFTMAX(8) |
	    V_KEEPALIVEMAXR1(4) |
	    V_KEEPALIVEMAXR2(9));
	t4_write_reg(sc, A_ULP_RX_TDDP_PSZ, V_HPZ0(PAGE_SHIFT - 12));

	/*
	 * Work-around for bug 2619
	 * Set DisableVlan field in TP_RSS_CONFIG_VRT register so that the
	 * VLAN tag extraction is disabled.
	 */
	t4_set_reg_field(sc, A_TP_RSS_CONFIG_VRT, F_DISABLEVLAN, F_DISABLEVLAN);

	/* Store filter mode */
	t4_read_indirect(sc, A_TP_PIO_ADDR, A_TP_PIO_DATA, &sc->filter_mode, 1,
	    A_TP_VLAN_PRI_MAP);

	/*
	 * First pass over all the ports - allocate VIs and initialize some
	 * basic parameters like mac address, port type, etc.  We also figure
	 * out whether a port is 10G or 1G and use that information when
	 * calculating how many interrupts to attempt to allocate.
	 */
	for_each_port(sc, i) {
		struct port_info *pi;

		pi = kmem_zalloc(sizeof (*pi), KM_SLEEP);
		sc->port[i] = pi;

		/* These must be set before t4_port_init */
		pi->adapter = sc;
		pi->port_id = i;
	}

	/* Allocate the vi and initialize parameters like mac addr */
	rc = -t4_port_init(sc, sc->mbox, sc->pf, 0);
	if (rc) {
		cxgb_printf(dip, CE_WARN, "unable to initialize port: %d", rc);
		goto done;
	}

	for_each_port(sc, i) {
		struct port_info *pi = sc->port[i];

		mutex_init(&pi->lock, NULL, MUTEX_DRIVER, NULL);
		pi->mtu = ETHERMTU;

		if (t4_port_is_10xg(pi)) {
			nxg++;
			pi->tmr_idx = prp->tmr_idx_10g;
			pi->pktc_idx = prp->pktc_idx_10g;
		} else {
			n1g++;
			pi->tmr_idx = prp->tmr_idx_1g;
			pi->pktc_idx = prp->pktc_idx_1g;
		}
		pi->dbq_timer_idx = prp->dbq_timer_idx;

		pi->xact_addr_filt = -1;
	}

	(void) remove_extra_props(sc, nxg, n1g);

	rc = cfg_itype_and_nqueues(sc, nxg, n1g, &iaq);
	if (rc != 0)
		goto done; /* error message displayed already */

	sc->intr_type = iaq.intr_type;
	sc->intr_count = iaq.nirq;

	if (sc->props.multi_rings && (sc->intr_type != DDI_INTR_TYPE_MSIX)) {
		sc->props.multi_rings = 0;
		cxgb_printf(dip, CE_WARN,
		    "Multiple rings disabled as interrupt type is not MSI-X");
	}

	if (sc->props.multi_rings && iaq.intr_fwd) {
		sc->props.multi_rings = 0;
		cxgb_printf(dip, CE_WARN,
		    "Multiple rings disabled as interrupts are forwarded");
	}

	if (!sc->props.multi_rings) {
		iaq.ntxq10g = 1;
		iaq.ntxq1g = 1;
	}
	s = &sc->sge;
	s->nrxq = nxg * iaq.nrxq10g + n1g * iaq.nrxq1g;
	s->ntxq = nxg * iaq.ntxq10g + n1g * iaq.ntxq1g;
	s->neq = s->ntxq + s->nrxq;	/* the fl in an rxq is an eq */
	s->niq = s->nrxq + 1;		/* 1 extra for firmware event queue */
	if (iaq.intr_fwd != 0)
		sc->flags |= TAF_INTR_FWD;
	s->rxq = kmem_zalloc(s->nrxq * sizeof (struct sge_rxq), KM_SLEEP);
	s->txq = kmem_zalloc(s->ntxq * sizeof (struct sge_txq), KM_SLEEP);
	s->iqmap =
	    kmem_zalloc(s->iqmap_sz * sizeof (struct sge_iq *), KM_SLEEP);
	s->eqmap =
	    kmem_zalloc(s->eqmap_sz * sizeof (struct sge_eq *), KM_SLEEP);

	sc->intr_handle =
	    kmem_zalloc(sc->intr_count * sizeof (ddi_intr_handle_t), KM_SLEEP);

	/*
	 * Second pass over the ports.  This time we know the number of rx and
	 * tx queues that each port should get.
	 */
	rqidx = tqidx = 0;
	for_each_port(sc, i) {
		struct port_info *pi = sc->port[i];

		if (pi == NULL)
			continue;

		t4_mc_cb_init(pi);
		pi->first_rxq = rqidx;
		pi->nrxq = (t4_port_is_10xg(pi)) ? iaq.nrxq10g : iaq.nrxq1g;
		pi->first_txq = tqidx;
		pi->ntxq = (t4_port_is_10xg(pi)) ? iaq.ntxq10g : iaq.ntxq1g;

		rqidx += pi->nrxq;
		tqidx += pi->ntxq;

		/*
		 * Enable hw checksumming and LSO for all ports by default.
		 * They can be disabled using ndd (hw_csum and hw_lso).
		 */
		pi->features |= (CXGBE_HW_CSUM | CXGBE_HW_LSO);
	}

	/*
	 * Setup Interrupts.
	 */

	i = 0;
	rc = ddi_intr_alloc(dip, sc->intr_handle, sc->intr_type, 0,
	    sc->intr_count, &i, DDI_INTR_ALLOC_STRICT);
	if (rc != DDI_SUCCESS) {
		cxgb_printf(dip, CE_WARN,
		    "failed to allocate %d interrupt(s) of type %d: %d, %d",
		    sc->intr_count, sc->intr_type, rc, i);
		goto done;
	}
	ASSERT(sc->intr_count == i); /* allocation was STRICT */
	(void) ddi_intr_get_cap(sc->intr_handle[0], &sc->intr_cap);
	(void) ddi_intr_get_pri(sc->intr_handle[0], &sc->intr_pri);
	if (sc->intr_count == 1) {
		ASSERT(sc->flags & TAF_INTR_FWD);
		(void) ddi_intr_add_handler(sc->intr_handle[0], t4_intr_all, sc,
		    &s->fwq);
	} else {
		/* Multiple interrupts.  The first one is always error intr */
		(void) ddi_intr_add_handler(sc->intr_handle[0], t4_intr_err, sc,
		    NULL);
		irq++;

		/* The second one is always the firmware event queue */
		(void) ddi_intr_add_handler(sc->intr_handle[1], t4_intr, sc,
		    &s->fwq);
		irq++;
		/*
		 * Note that if TAF_INTR_FWD is set then either the NIC rx
		 * queues or (exclusive or) the TOE rx queueus will be taking
		 * direct interrupts.
		 *
		 * There is no need to check for is_offload(sc) as nofldrxq
		 * will be 0 if offload is disabled.
		 */
		for_each_port(sc, i) {
			struct port_info *pi = sc->port[i];
			struct sge_rxq *rxq;
			rxq = &s->rxq[pi->first_rxq];
			for (q = 0; q < pi->nrxq; q++, rxq++) {
				(void) ddi_intr_add_handler(
				    sc->intr_handle[irq], t4_intr, sc,
				    &rxq->iq);
				irq++;
			}
		}

	}
	sc->flags |= TAF_INTR_ALLOC;

	if ((rc = ksensor_create_scalar_pcidev(dip, SENSOR_KIND_TEMPERATURE,
	    &t4_temp_ops, sc, "temp", &sc->temp_sensor)) != 0) {
		cxgb_printf(dip, CE_WARN, "failed to create temperature "
		    "sensor: %d", rc);
		rc = DDI_FAILURE;
		goto done;
	}

	if ((rc = ksensor_create_scalar_pcidev(dip, SENSOR_KIND_VOLTAGE,
	    &t4_volt_ops, sc, "vdd", &sc->volt_sensor)) != 0) {
		cxgb_printf(dip, CE_WARN, "failed to create voltage "
		    "sensor: %d", rc);
		rc = DDI_FAILURE;
		goto done;
	}


	if ((rc = ddi_ufm_init(dip, DDI_UFM_CURRENT_VERSION, &t4_ufm_ops,
	    &sc->ufm_hdl, sc)) != 0) {
		cxgb_printf(dip, CE_WARN, "failed to enable UFM ops: %d", rc);
		rc = DDI_FAILURE;
		goto done;
	}
	ddi_ufm_update(sc->ufm_hdl);

	if ((rc = t4_alloc_fwq(sc)) != 0) {
		cxgb_printf(dip, CE_WARN, "failed to alloc FWQ: %d", rc);
		rc = DDI_FAILURE;
		goto done;
	}

	if (sc->intr_cap & DDI_INTR_FLAG_BLOCK) {
		(void) ddi_intr_block_enable(sc->intr_handle, sc->intr_count);
	} else {
		for (i = 0; i < sc->intr_count; i++)
			(void) ddi_intr_enable(sc->intr_handle[i]);
	}
	t4_intr_enable(sc);

	/*
	 * At this point, adapter-level initialization can be considered
	 * successful.  The ports themselves will be initialized later when mac
	 * attaches/starts them via cxgbe.
	 */
	sc->flags |= TAF_INIT_DONE;
	ddi_report_dev(dip);

	/*
	 * Hardware/Firmware/etc. Version/Revision IDs.
	 */
	t4_dump_version_info(sc);

	cxgb_printf(dip, CE_NOTE, "(%d rxq, %d txq total) %d %s.",
	    rqidx, tqidx, sc->intr_count,
	    sc->intr_type == DDI_INTR_TYPE_MSIX ? "MSI-X interrupts" :
	    sc->intr_type == DDI_INTR_TYPE_MSI ? "MSI interrupts" :
	    "fixed interrupt");

	sc->ksp = setup_kstats(sc);
	sc->ksp_stat = setup_wc_kstats(sc);
	sc->params.drv_memwin = MEMWIN_NIC;

done:
	if (rc != DDI_SUCCESS) {
		(void) t4_devo_detach(dip, DDI_DETACH);

		/* rc may have errno style errors or DDI errors */
		rc = DDI_FAILURE;
	}

	return (rc);
}

static int
t4_devo_detach(dev_info_t *dip, ddi_detach_cmd_t cmd)
{
	int instance, i;
	struct adapter *sc;
	struct port_info *pi;
	struct sge *s;

	if (cmd != DDI_DETACH)
		return (DDI_FAILURE);

	instance = ddi_get_instance(dip);
	sc = ddi_get_soft_state(t4_soft_state, instance);
	if (sc == NULL)
		return (DDI_SUCCESS);

	if (sc->flags & TAF_INIT_DONE) {
		t4_intr_disable(sc);
		for_each_port(sc, i) {
			pi = sc->port[i];
			if (pi && pi->flags & TPF_INIT_DONE)
				(void) t4_port_full_uninit(pi);
		}

		if (sc->intr_cap & DDI_INTR_FLAG_BLOCK) {
			(void) ddi_intr_block_disable(sc->intr_handle,
			    sc->intr_count);
		} else {
			for (i = 0; i < sc->intr_count; i++)
				(void) ddi_intr_disable(sc->intr_handle[i]);
		}

		(void) t4_free_fwq(sc);

		sc->flags &= ~TAF_INIT_DONE;
	}

	/* Safe to call no matter what */
	if (sc->ufm_hdl != NULL) {
		ddi_ufm_fini(sc->ufm_hdl);
		sc->ufm_hdl = NULL;
	}
	(void) ksensor_remove(dip, KSENSOR_ALL_IDS);
	ddi_prop_remove_all(dip);
	ddi_remove_minor_node(dip, NULL);

	if (sc->ksp != NULL)
		kstat_delete(sc->ksp);
	if (sc->ksp_stat != NULL)
		kstat_delete(sc->ksp_stat);

	s = &sc->sge;
	if (s->rxq != NULL)
		kmem_free(s->rxq, s->nrxq * sizeof (struct sge_rxq));
	if (s->txq != NULL)
		kmem_free(s->txq, s->ntxq * sizeof (struct sge_txq));
	if (s->iqmap != NULL)
		kmem_free(s->iqmap, s->iqmap_sz * sizeof (struct sge_iq *));
	if (s->eqmap != NULL)
		kmem_free(s->eqmap, s->eqmap_sz * sizeof (struct sge_eq *));

	if (s->rxbuf_cache != NULL)
		kmem_cache_destroy(s->rxbuf_cache);

	if (sc->flags & TAF_INTR_ALLOC) {
		for (i = 0; i < sc->intr_count; i++) {
			(void) ddi_intr_remove_handler(sc->intr_handle[i]);
			(void) ddi_intr_free(sc->intr_handle[i]);
		}
		sc->flags &= ~TAF_INTR_ALLOC;
	}

	if (sc->intr_handle != NULL) {
		kmem_free(sc->intr_handle,
		    sc->intr_count * sizeof (*sc->intr_handle));
	}

	for_each_port(sc, i) {
		pi = sc->port[i];
		if (pi != NULL) {
			mutex_destroy(&pi->lock);
			kmem_free(pi, sizeof (*pi));
		}
	}

	if (sc->flags & FW_OK)
		(void) t4_fw_bye(sc, sc->mbox);

	if (sc->bar2_hdl != NULL) {
		ddi_regs_map_free(&sc->bar2_hdl);
		sc->bar2_hdl = NULL;
		sc->bar2_ptr = NULL;
	}

	if (sc->regh != NULL) {
		ddi_regs_map_free(&sc->regh);
		sc->regh = NULL;
		sc->regp = NULL;
	}

	if (sc->pci_regh != NULL) {
		pci_config_teardown(&sc->pci_regh);
	}

	mutex_enter(&t4_adapter_list_lock);
	list_remove(&t4_adapter_list, sc);
	mutex_exit(&t4_adapter_list_lock);

	mutex_destroy(&sc->mbox_lock);
	mutex_destroy(&sc->lock);
	cv_destroy(&sc->cv);
	mutex_destroy(&sc->sfl_lock);

#ifdef DEBUG
	bzero(sc, sizeof (*sc));
#endif
	ddi_soft_state_free(t4_soft_state, instance);

	return (DDI_SUCCESS);
}

static int
t4_devo_quiesce(dev_info_t *dip)
{
	int instance;
	struct adapter *sc;

	instance = ddi_get_instance(dip);
	sc = ddi_get_soft_state(t4_soft_state, instance);
	if (sc == NULL)
		return (DDI_SUCCESS);

	t4_set_reg_field(sc, A_SGE_CONTROL, F_GLOBALENABLE, 0);
	t4_intr_disable(sc);
	t4_write_reg(sc, A_PL_RST, F_PIORSTMODE | F_PIORST);

	return (DDI_SUCCESS);
}

static int
t4_bus_ctl(dev_info_t *dip, dev_info_t *rdip, ddi_ctl_enum_t op, void *arg,
    void *result)
{
	char s[4];
	struct port_info *pi;
	dev_info_t *child = (dev_info_t *)arg;

	switch (op) {
	case DDI_CTLOPS_REPORTDEV:
		pi = ddi_get_parent_data(rdip);
		pi->instance = ddi_get_instance(dip);
		pi->child_inst = ddi_get_instance(rdip);
		return (DDI_SUCCESS);

	case DDI_CTLOPS_INITCHILD:
		pi = ddi_get_parent_data(child);
		if (pi == NULL)
			return (DDI_NOT_WELL_FORMED);
		(void) snprintf(s, sizeof (s), "%d", pi->port_id);
		ddi_set_name_addr(child, s);
		return (DDI_SUCCESS);

	case DDI_CTLOPS_UNINITCHILD:
		ddi_set_name_addr(child, NULL);
		return (DDI_SUCCESS);

	case DDI_CTLOPS_ATTACH:
	case DDI_CTLOPS_DETACH:
		return (DDI_SUCCESS);

	default:
		return (ddi_ctlops(dip, rdip, op, arg, result));
	}
}

static int
t4_bus_config(dev_info_t *dip, uint_t flags, ddi_bus_config_op_t op, void *arg,
    dev_info_t **cdipp)
{
	int instance, i;
	struct adapter *sc;

	instance = ddi_get_instance(dip);
	sc = ddi_get_soft_state(t4_soft_state, instance);

	if (op == BUS_CONFIG_ONE) {
		char *c;

		/*
		 * arg is something like "cxgb@0" where 0 is the port_id hanging
		 * off this nexus.
		 */

		c = arg;
		while (*(c + 1))
			c++;

		/* There should be exactly 1 digit after '@' */
		if (*(c - 1) != '@')
			return (NDI_FAILURE);

		i = *c - '0';

		if (add_child_node(sc, i) != 0)
			return (NDI_FAILURE);

		flags |= NDI_ONLINE_ATTACH;

	} else if (op == BUS_CONFIG_ALL || op == BUS_CONFIG_DRIVER) {
		/* Allocate and bind all child device nodes */
		for_each_port(sc, i)
		    (void) add_child_node(sc, i);
		flags |= NDI_ONLINE_ATTACH;
	}

	return (ndi_busop_bus_config(dip, flags, op, arg, cdipp, 0));
}

static int
t4_bus_unconfig(dev_info_t *dip, uint_t flags, ddi_bus_config_op_t op,
    void *arg)
{
	int instance, i, rc;
	struct adapter *sc;

	instance = ddi_get_instance(dip);
	sc = ddi_get_soft_state(t4_soft_state, instance);

	if (op == BUS_CONFIG_ONE || op == BUS_UNCONFIG_ALL ||
	    op == BUS_UNCONFIG_DRIVER)
		flags |= NDI_UNCONFIG;

	rc = ndi_busop_bus_unconfig(dip, flags, op, arg);
	if (rc != 0)
		return (rc);

	if (op == BUS_UNCONFIG_ONE) {
		char *c;

		c = arg;
		while (*(c + 1))
			c++;

		if (*(c - 1) != '@')
			return (NDI_SUCCESS);

		i = *c - '0';

		rc = remove_child_node(sc, i);

	} else if (op == BUS_UNCONFIG_ALL || op == BUS_UNCONFIG_DRIVER) {

		for_each_port(sc, i)
		    (void) remove_child_node(sc, i);
	}

	return (rc);
}

/* ARGSUSED */
static int
t4_cb_open(dev_t *devp, int flag, int otyp, cred_t *credp)
{
	struct adapter *sc;

	if (otyp != OTYP_CHR)
		return (EINVAL);

	sc = ddi_get_soft_state(t4_soft_state, getminor(*devp));
	if (sc == NULL)
		return (ENXIO);

	return (atomic_cas_uint(&sc->open, 0, EBUSY));
}

/* ARGSUSED */
static int
t4_cb_close(dev_t dev, int flag, int otyp, cred_t *credp)
{
	struct adapter *sc;

	sc = ddi_get_soft_state(t4_soft_state, getminor(dev));
	if (sc == NULL)
		return (EINVAL);

	(void) atomic_swap_uint(&sc->open, 0);
	return (0);
}

/* ARGSUSED */
static int
t4_cb_ioctl(dev_t dev, int cmd, intptr_t d, int mode, cred_t *credp, int *rp)
{
	int instance;
	struct adapter *sc;
	void *data = (void *)d;

	if (crgetuid(credp) != 0)
		return (EPERM);

	instance = getminor(dev);
	sc = ddi_get_soft_state(t4_soft_state, instance);
	if (sc == NULL)
		return (EINVAL);

	return (t4_ioctl(sc, cmd, data, mode));
}

static unsigned int
getpf(struct adapter *sc)
{
	int rc, *data;
	uint_t n, pf;

	rc = ddi_prop_lookup_int_array(DDI_DEV_T_ANY, sc->dip,
	    DDI_PROP_DONTPASS, "reg", &data, &n);
	if (rc != DDI_SUCCESS) {
		cxgb_printf(sc->dip, CE_WARN,
		    "failed to lookup \"reg\" property: %d", rc);
		return (0xff);
	}

	pf = PCI_REG_FUNC_G(data[0]);
	ddi_prop_free(data);

	return (pf);
}

/*
 * Install a compatible firmware (if required), establish contact with it,
 * become the master, and reset the device.
 */
static int
prep_firmware(struct adapter *sc)
{
	int rc;
	size_t fw_size;
	int reset = 1;
	enum dev_state state;
	unsigned char *fw_data;
	struct fw_hdr *card_fw, *hdr;
	const char *fw_file = NULL;
	firmware_handle_t fw_hdl;
	struct fw_info fi, *fw_info = &fi;

	struct driver_properties *p = &sc->props;

	/* Contact firmware, request master */
	rc = t4_fw_hello(sc, sc->mbox, sc->mbox, MASTER_MUST, &state);
	if (rc < 0) {
		rc = -rc;
		cxgb_printf(sc->dip, CE_WARN,
		    "failed to connect to the firmware: %d.", rc);
		return (rc);
	}

	if (rc == sc->mbox)
		sc->flags |= TAF_MASTER_PF;

	/* We may need FW version info for later reporting */
	t4_get_version_info(sc);

	switch (CHELSIO_CHIP_VERSION(sc->params.chip)) {
	case CHELSIO_T4:
		fw_file = "t4fw.bin";
		break;
	case CHELSIO_T5:
		fw_file = "t5fw.bin";
		break;
	case CHELSIO_T6:
		fw_file = "t6fw.bin";
		break;
	default:
		cxgb_printf(sc->dip, CE_WARN, "Adapter type not supported\n");
		return (EINVAL);
	}

	if (firmware_open(T4_PORT_NAME, fw_file, &fw_hdl) != 0) {
		cxgb_printf(sc->dip, CE_WARN, "Could not open %s\n", fw_file);
		return (EINVAL);
	}

	fw_size = firmware_get_size(fw_hdl);

	if (fw_size < sizeof (struct fw_hdr)) {
		cxgb_printf(sc->dip, CE_WARN, "%s is too small (%ld bytes)\n",
		    fw_file, fw_size);
		firmware_close(fw_hdl);
		return (EINVAL);
	}

	if (fw_size > FLASH_FW_MAX_SIZE) {
		cxgb_printf(sc->dip, CE_WARN,
		    "%s is too large (%ld bytes, max allowed is %ld)\n",
		    fw_file, fw_size, FLASH_FW_MAX_SIZE);
		firmware_close(fw_hdl);
		return (EFBIG);
	}

	fw_data = kmem_zalloc(fw_size, KM_SLEEP);
	if (firmware_read(fw_hdl, 0, fw_data, fw_size) != 0) {
		cxgb_printf(sc->dip, CE_WARN, "Failed to read from %s\n",
		    fw_file);
		firmware_close(fw_hdl);
		kmem_free(fw_data, fw_size);
		return (EINVAL);
	}
	firmware_close(fw_hdl);

	bzero(fw_info, sizeof (*fw_info));
	fw_info->chip = CHELSIO_CHIP_VERSION(sc->params.chip);

	hdr = (struct fw_hdr *)fw_data;
	fw_info->fw_hdr.fw_ver = hdr->fw_ver;
	fw_info->fw_hdr.chip = hdr->chip;
	fw_info->fw_hdr.intfver_nic = hdr->intfver_nic;
	fw_info->fw_hdr.intfver_vnic = hdr->intfver_vnic;
	fw_info->fw_hdr.intfver_ofld = hdr->intfver_ofld;
	fw_info->fw_hdr.intfver_ri = hdr->intfver_ri;
	fw_info->fw_hdr.intfver_iscsipdu = hdr->intfver_iscsipdu;
	fw_info->fw_hdr.intfver_iscsi = hdr->intfver_iscsi;
	fw_info->fw_hdr.intfver_fcoepdu = hdr->intfver_fcoepdu;
	fw_info->fw_hdr.intfver_fcoe = hdr->intfver_fcoe;

	/* allocate memory to read the header of the firmware on the card */
	card_fw = kmem_zalloc(sizeof (*card_fw), KM_SLEEP);

	rc = -t4_prep_fw(sc, fw_info, fw_data, fw_size, card_fw,
	    p->t4_fw_install, state, &reset);

	kmem_free(card_fw, sizeof (*card_fw));
	kmem_free(fw_data, fw_size);

	if (rc != 0) {
		cxgb_printf(sc->dip, CE_WARN,
		    "failed to install firmware: %d", rc);
		return (rc);
	} else {
		/* refresh */
		(void) t4_check_fw_version(sc);
	}

	/* Reset device */
	rc = -t4_fw_reset(sc, sc->mbox, F_PIORSTMODE | F_PIORST);
	if (rc != 0) {
		cxgb_printf(sc->dip, CE_WARN,
		    "firmware reset failed: %d.", rc);
		if (rc != ETIMEDOUT && rc != EIO)
			(void) t4_fw_bye(sc, sc->mbox);
		return (rc);
	}

	/* Partition adapter resources as specified in the config file. */
	if (sc->flags & TAF_MASTER_PF) {
		/* Handle default vs special T4 config file */

		rc = partition_resources(sc);
		if (rc != 0)
			goto err;	/* error message displayed already */
	}

	sc->flags |= FW_OK;
	return (0);
err:
	return (rc);

}

static const struct memwin t4_memwin[] = {
	{ MEMWIN0_BASE, MEMWIN0_APERTURE },
	{ MEMWIN1_BASE, MEMWIN1_APERTURE },
	{ MEMWIN2_BASE, MEMWIN2_APERTURE }
};

static const struct memwin t5_memwin[] = {
	{ MEMWIN0_BASE, MEMWIN0_APERTURE },
	{ MEMWIN1_BASE, MEMWIN1_APERTURE },
	{ MEMWIN2_BASE_T5, MEMWIN2_APERTURE_T5 },
};

#define	FW_PARAM_DEV(param) \
	(V_FW_PARAMS_MNEM(FW_PARAMS_MNEM_DEV) | \
	    V_FW_PARAMS_PARAM_X(FW_PARAMS_PARAM_DEV_##param))
#define	FW_PARAM_PFVF(param) \
	(V_FW_PARAMS_MNEM(FW_PARAMS_MNEM_PFVF) | \
	    V_FW_PARAMS_PARAM_X(FW_PARAMS_PARAM_PFVF_##param))

/*
 * Verify that the memory range specified by the memtype/offset/len pair is
 * valid and lies entirely within the memtype specified.  The global address of
 * the start of the range is returned in addr.
 */
int
validate_mt_off_len(struct adapter *sc, int mtype, uint32_t off, int len,
    uint32_t *addr)
{
	uint32_t em, addr_len, maddr, mlen;

	/* Memory can only be accessed in naturally aligned 4 byte units */
	if (off & 3 || len & 3 || len == 0)
		return (EINVAL);

	em = t4_read_reg(sc, A_MA_TARGET_MEM_ENABLE);
	switch (mtype) {
		case MEM_EDC0:
			if (!(em & F_EDRAM0_ENABLE))
				return (EINVAL);
			addr_len = t4_read_reg(sc, A_MA_EDRAM0_BAR);
			maddr = G_EDRAM0_BASE(addr_len) << 20;
			mlen = G_EDRAM0_SIZE(addr_len) << 20;
			break;
		case MEM_EDC1:
			if (!(em & F_EDRAM1_ENABLE))
				return (EINVAL);
			addr_len = t4_read_reg(sc, A_MA_EDRAM1_BAR);
			maddr = G_EDRAM1_BASE(addr_len) << 20;
			mlen = G_EDRAM1_SIZE(addr_len) << 20;
			break;
		case MEM_MC:
			if (!(em & F_EXT_MEM_ENABLE))
				return (EINVAL);
			addr_len = t4_read_reg(sc, A_MA_EXT_MEMORY_BAR);
			maddr = G_EXT_MEM_BASE(addr_len) << 20;
			mlen = G_EXT_MEM_SIZE(addr_len) << 20;
			break;
		case MEM_MC1:
			if (t4_cver_eq(sc, CHELSIO_T4) ||
			    !(em & F_EXT_MEM1_ENABLE)) {
				return (EINVAL);
			}
			addr_len = t4_read_reg(sc, A_MA_EXT_MEMORY1_BAR);
			maddr = G_EXT_MEM1_BASE(addr_len) << 20;
			mlen = G_EXT_MEM1_SIZE(addr_len) << 20;
			break;
		default:
			return (EINVAL);
	}

	if (mlen > 0 && off < mlen && off + len <= mlen) {
		*addr = maddr + off;    /* global address */
		return (0);
	}

	return (EFAULT);
}

static void
memwin_info(struct adapter *sc, int win, uint32_t *base, uint32_t *aperture)
{
	const struct memwin *mw;

	if (t4_cver_eq(sc, CHELSIO_T4)) {
		mw = &t4_memwin[win];
	} else {
		mw = &t5_memwin[win];
	}

	if (base != NULL)
		*base = mw->base;
	if (aperture != NULL)
		*aperture = mw->aperture;
}

/*
 * Upload configuration file to card's memory.
 */
static int
upload_config_file(struct adapter *sc, uint32_t *mt, uint32_t *ma)
{
	int rc = 0;
	size_t cflen, cfbaselen;
	uint_t i, n;
	uint32_t param, val, addr, mtype, maddr;
	uint32_t off, mw_base, mw_aperture;
	uint32_t *cfdata, *cfbase;
	firmware_handle_t fw_hdl;
	const char *cfg_file = NULL;

	/* Figure out where the firmware wants us to upload it. */
	param = FW_PARAM_DEV(CF);
	rc = -t4_query_params(sc, sc->mbox, sc->pf, 0, 1, &param, &val);
	if (rc != 0) {
		/* Firmwares without config file support will fail this way */
		cxgb_printf(sc->dip, CE_WARN,
		    "failed to query config file location: %d.\n", rc);
		return (rc);
	}
	*mt = mtype = G_FW_PARAMS_PARAM_Y(val);
	*ma = maddr = G_FW_PARAMS_PARAM_Z(val) << 16;

	switch (CHELSIO_CHIP_VERSION(sc->params.chip)) {
	case CHELSIO_T4:
		cfg_file = "t4fw_cfg.txt";
		break;
	case CHELSIO_T5:
		cfg_file = "t5fw_cfg.txt";
		break;
	case CHELSIO_T6:
		cfg_file = "t6fw_cfg.txt";
		break;
	default:
		cxgb_printf(sc->dip, CE_WARN, "Invalid Adapter detected\n");
		return (EINVAL);
	}

	if (firmware_open(T4_PORT_NAME, cfg_file, &fw_hdl) != 0) {
		cxgb_printf(sc->dip, CE_WARN, "Could not open %s\n", cfg_file);
		return (EINVAL);
	}

	cflen = firmware_get_size(fw_hdl);
	/*
	 * Truncate the length to a multiple of uint32_ts. The configuration
	 * text files have trailing comments (and hopefully always will) so
	 * nothing important is lost.
	 */
	cflen &= ~3;

	if (cflen > FLASH_CFG_MAX_SIZE) {
		cxgb_printf(sc->dip, CE_WARN,
		    "config file too long (%d, max allowed is %d).  ",
		    cflen, FLASH_CFG_MAX_SIZE);
		firmware_close(fw_hdl);
		return (EFBIG);
	}

	rc = validate_mt_off_len(sc, mtype, maddr, cflen, &addr);
	if (rc != 0) {
		cxgb_printf(sc->dip, CE_WARN,
		    "%s: addr (%d/0x%x) or len %d is not valid: %d.  "
		    "Will try to use the config on the card, if any.\n",
		    __func__, mtype, maddr, cflen, rc);
		firmware_close(fw_hdl);
		return (EFAULT);
	}

	cfbaselen = cflen;
	cfbase = cfdata = kmem_zalloc(cflen, KM_SLEEP);
	if (firmware_read(fw_hdl, 0, cfdata, cflen) != 0) {
		cxgb_printf(sc->dip, CE_WARN, "Failed to read from %s\n",
		    cfg_file);
		firmware_close(fw_hdl);
		kmem_free(cfbase, cfbaselen);
		return (EINVAL);
	}
	firmware_close(fw_hdl);

	memwin_info(sc, 2, &mw_base, &mw_aperture);
	while (cflen) {
		off = t4_position_memwin(sc, 2, addr);
		n = min(cflen, mw_aperture - off);
		for (i = 0; i < n; i += 4)
			t4_write_reg(sc, mw_base + off + i, *cfdata++);
		cflen -= n;
		addr += n;
	}

	kmem_free(cfbase, cfbaselen);

	return (rc);
}

/*
 * Partition chip resources for use between various PFs, VFs, etc.  This is done
 * by uploading the firmware configuration file to the adapter and instructing
 * the firmware to process it.
 */
static int
partition_resources(struct adapter *sc)
{
	int rc;
	struct fw_caps_config_cmd caps;
	uint32_t mtype, maddr, finicsum, cfcsum;

	rc = upload_config_file(sc, &mtype, &maddr);
	if (rc != 0) {
		mtype = FW_MEMTYPE_CF_FLASH;
		maddr = t4_flash_cfg_addr(sc);
	}

	bzero(&caps, sizeof (caps));
	caps.op_to_write = BE_32(V_FW_CMD_OP(FW_CAPS_CONFIG_CMD) |
	    F_FW_CMD_REQUEST | F_FW_CMD_READ);
	caps.cfvalid_to_len16 = BE_32(F_FW_CAPS_CONFIG_CMD_CFVALID |
	    V_FW_CAPS_CONFIG_CMD_MEMTYPE_CF(mtype) |
	    V_FW_CAPS_CONFIG_CMD_MEMADDR64K_CF(maddr >> 16) | FW_LEN16(caps));
	rc = -t4_wr_mbox(sc, sc->mbox, &caps, sizeof (caps), &caps);
	if (rc != 0) {
		cxgb_printf(sc->dip, CE_WARN,
		    "failed to pre-process config file: %d.\n", rc);
		return (rc);
	}

	finicsum = ntohl(caps.finicsum);
	cfcsum = ntohl(caps.cfcsum);
	if (finicsum != cfcsum) {
		cxgb_printf(sc->dip, CE_WARN,
		    "WARNING: config file checksum mismatch: %08x %08x\n",
		    finicsum, cfcsum);
	}
	sc->cfcsum = cfcsum;

	/* TODO: Need to configure this correctly */
	caps.toecaps = htons(FW_CAPS_CONFIG_TOE);
	caps.iscsicaps = 0;
	caps.rdmacaps = 0;
	caps.fcoecaps = 0;
	/* TODO: Disable VNIC cap for now */
	caps.niccaps ^= htons(FW_CAPS_CONFIG_NIC_VM);

	caps.op_to_write = htonl(V_FW_CMD_OP(FW_CAPS_CONFIG_CMD) |
	    F_FW_CMD_REQUEST | F_FW_CMD_WRITE);
	caps.cfvalid_to_len16 = htonl(FW_LEN16(caps));
	rc = -t4_wr_mbox(sc, sc->mbox, &caps, sizeof (caps), NULL);
	if (rc != 0) {
		cxgb_printf(sc->dip, CE_WARN,
		    "failed to process config file: %d.\n", rc);
		return (rc);
	}

	return (0);
}

/*
 * Tweak configuration based on module parameters, etc.  Most of these have
 * defaults assigned to them by Firmware Configuration Files (if we're using
 * them) but need to be explicitly set if we're using hard-coded
 * initialization.  But even in the case of using Firmware Configuration
 * Files, we'd like to expose the ability to change these via module
 * parameters so these are essentially common tweaks/settings for
 * Configuration Files and hard-coded initialization ...
 */
static int
adap__pre_init_tweaks(struct adapter *sc)
{
	int rx_dma_offset = 2; /* Offset of RX packets into DMA buffers */

	/*
	 * Fix up various Host-Dependent Parameters like Page Size, Cache
	 * Line Size, etc.  The firmware default is for a 4KB Page Size and
	 * 64B Cache Line Size ...
	 */
	(void) t4_fixup_host_params_compat(sc, PAGE_SIZE, _CACHE_LINE_SIZE,
	    T5_LAST_REV);

	t4_set_reg_field(sc, A_SGE_CONTROL, V_PKTSHIFT(M_PKTSHIFT),
	    V_PKTSHIFT(rx_dma_offset));

	return (0);
}
/*
 * Retrieve parameters that are needed (or nice to have) prior to calling
 * t4_sge_init and t4_fw_initialize.
 */
static int
get_params__pre_init(struct adapter *sc)
{
	int rc;
	uint32_t param[2], val[2];
	struct fw_devlog_cmd cmd;
	struct devlog_params *dlog = &sc->params.devlog;

	/*
	 * Grab the raw VPD parameters.
	 */
	rc = -t4_get_raw_vpd_params(sc, &sc->params.vpd);
	if (rc != 0) {
		cxgb_printf(sc->dip, CE_WARN,
		    "failed to query VPD parameters (pre_init): %d.\n", rc);
		return (rc);
	}

	param[0] = FW_PARAM_DEV(PORTVEC);
	param[1] = FW_PARAM_DEV(CCLK);
	rc = -t4_query_params(sc, sc->mbox, sc->pf, 0, 2, param, val);
	if (rc != 0) {
		cxgb_printf(sc->dip, CE_WARN,
		    "failed to query parameters (pre_init): %d.\n", rc);
		return (rc);
	}

	if (val[0] == 0) {
		cxgb_printf(sc->dip, CE_WARN, "no usable ports");
		return (ENODEV);
	}

	sc->params.portvec = val[0];
	sc->params.nports = 0;
	while (val[0]) {
		sc->params.nports++;
		val[0] &= val[0] - 1;
	}

	sc->params.vpd.cclk = val[1];

	/* Read device log parameters. */
	bzero(&cmd, sizeof (cmd));
	cmd.op_to_write = htonl(V_FW_CMD_OP(FW_DEVLOG_CMD) |
	    F_FW_CMD_REQUEST | F_FW_CMD_READ);
	cmd.retval_len16 = htonl(FW_LEN16(cmd));
	rc = -t4_wr_mbox(sc, sc->mbox, &cmd, sizeof (cmd), &cmd);
	if (rc != 0) {
		cxgb_printf(sc->dip, CE_WARN,
		    "failed to get devlog parameters: %d.\n", rc);
		bzero(dlog, sizeof (*dlog));
		rc = 0;	/* devlog isn't critical for device operation */
	} else {
		val[0] = ntohl(cmd.memtype_devlog_memaddr16_devlog);
		dlog->memtype = G_FW_DEVLOG_CMD_MEMTYPE_DEVLOG(val[0]);
		dlog->start = G_FW_DEVLOG_CMD_MEMADDR16_DEVLOG(val[0]) << 4;
		dlog->size = ntohl(cmd.memsize_devlog);
	}

	return (rc);
}

/*
 * Retrieve various parameters that are of interest to the driver.  The device
 * has been initialized by the firmware at this point.
 */
static int
get_params__post_init(struct adapter *sc)
{
	int rc;
	uint32_t param[4], val[4];
	struct fw_caps_config_cmd caps;

	param[0] = FW_PARAM_PFVF(IQFLINT_START);
	param[1] = FW_PARAM_PFVF(EQ_START);
	param[2] = FW_PARAM_PFVF(IQFLINT_END);
	param[3] = FW_PARAM_PFVF(EQ_END);
	rc = -t4_query_params(sc, sc->mbox, sc->pf, 0, 4, param, val);
	if (rc != 0) {
		cxgb_printf(sc->dip, CE_WARN,
		    "failed to query parameters (post_init): %d.\n", rc);
		return (rc);
	}

	sc->sge.iq_start = val[0];
	sc->sge.eq_start = val[1];
	sc->sge.iqmap_sz = val[2] - sc->sge.iq_start + 1;
	sc->sge.eqmap_sz = val[3] - sc->sge.eq_start + 1;

	uint32_t r = t4_read_reg(sc, A_SGE_EGRESS_QUEUES_PER_PAGE_PF);
	r >>= S_QUEUESPERPAGEPF0 +
	    (S_QUEUESPERPAGEPF1 - S_QUEUESPERPAGEPF0) * sc->pf;
	sc->sge.s_qpp = r & M_QUEUESPERPAGEPF0;

	/* get capabilites */
	bzero(&caps, sizeof (caps));
	caps.op_to_write = htonl(V_FW_CMD_OP(FW_CAPS_CONFIG_CMD) |
	    F_FW_CMD_REQUEST | F_FW_CMD_READ);
	caps.cfvalid_to_len16 = htonl(FW_LEN16(caps));
	rc = -t4_wr_mbox(sc, sc->mbox, &caps, sizeof (caps), &caps);
	if (rc != 0) {
		cxgb_printf(sc->dip, CE_WARN,
		    "failed to get card capabilities: %d.\n", rc);
		return (rc);
	}

	/* Check if DBQ timer is available for tracking egress completions */
	param[0] = (V_FW_PARAMS_MNEM(FW_PARAMS_MNEM_DEV) |
	    V_FW_PARAMS_PARAM_X(FW_PARAMS_PARAM_DEV_DBQ_TIMERTICK));
	rc = t4_query_params(sc, sc->mbox, sc->pf, 0, 1, param, val);
	if (rc == 0) {
		sc->sge.dbq_timer_tick = val[0];
		rc = t4_read_sge_dbqtimers(sc,
		    ARRAY_SIZE(sc->sge.dbq_timers), sc->sge.dbq_timers);
		if (rc == 0) {
			sc->flags |= TAF_DBQ_TIMER;
		} else {
			sc->sge.dbq_timer_tick = 0;
		}
	}

	/*
	 * Now that we know if the DBQ timer is present, tune the properties for
	 * hold-off parameter defaults.
	 */
	struct driver_properties *prp = &sc->props;
	if ((sc->flags & TAF_DBQ_TIMER) != 0) {
		/*
		 * Choose default DBQ timer index to be closest to 100us.  With
		 * that available, more aggressive coalescing on the FWQ is
		 * unnecessary, so shorter hold-off parameters are fine there.
		 */
		prp->dbq_timer_idx = t4_choose_dbq_timer(sc, 100);
		prp->fwq_tmr_idx = t4_choose_holdoff_timer(sc, 10);
		prp->fwq_pktc_idx = t4_choose_holdoff_pktcnt(sc, -1);
	} else {
		/*
		 * Without the DBQ timer, we fall back to the
		 * CIDXFlushThresholdOverride mechanism for TX completions,
		 * which can result in many more notifications, depending on the
		 * traffic pattern.  More aggressive interrupt coalescing on the
		 * firmware queue (where such notifications land) is recommended
		 * to deal with it.
		 *
		 * Pick values closest to a hold-off of 100us and/or 32 entries.
		 */
		prp->fwq_tmr_idx = t4_choose_holdoff_timer(sc, 100);
		prp->fwq_pktc_idx = t4_choose_holdoff_pktcnt(sc, 32);
	}
	sc->sge.fwq_tmr_idx = prp->fwq_tmr_idx;
	sc->sge.fwq_pktc_idx = prp->fwq_pktc_idx;

	rc = -t4_get_pfres(sc);
	if (rc != 0) {
		cxgb_printf(sc->dip, CE_WARN,
		    "failed to query PF resource params: %d.\n", rc);
		return (rc);
	}

	/* These are finalized by FW initialization, load their values now */
	val[0] = t4_read_reg(sc, A_TP_TIMER_RESOLUTION);
	sc->params.tp.tre = G_TIMERRESOLUTION(val[0]);
	sc->params.tp.dack_re = G_DELAYEDACKRESOLUTION(val[0]);
	t4_read_mtu_tbl(sc, sc->params.mtus, NULL);
	(void) t4_init_sge_params(sc);

	return (0);
}

static int
set_params__post_init(struct adapter *sc)
{
	uint32_t param, val;

	/* ask for encapsulated CPLs */
	param = FW_PARAM_PFVF(CPLFW4MSG_ENCAP);
	val = 1;
	(void) t4_set_params(sc, sc->mbox, sc->pf, 0, 1, &param, &val);

	return (0);
}

/* TODO: verify */
static void
t4_setup_adapter_memwin(struct adapter *sc)
{
	pci_regspec_t *data;
	int rc;
	uint_t n;
	uintptr_t bar0;
	uintptr_t mem_win0_base, mem_win1_base, mem_win2_base;
	uintptr_t mem_win2_aperture;

	rc = ddi_prop_lookup_int_array(DDI_DEV_T_ANY, sc->dip,
	    DDI_PROP_DONTPASS, "assigned-addresses", (int **)&data, &n);
	if (rc != DDI_SUCCESS) {
		cxgb_printf(sc->dip, CE_WARN,
		    "failed to lookup \"assigned-addresses\" property: %d", rc);
		return;
	}
	n /= sizeof (*data);

	bar0 = ((uint64_t)data[0].pci_phys_mid << 32) | data[0].pci_phys_low;
	ddi_prop_free(data);

	if (t4_cver_eq(sc, CHELSIO_T4)) {
		mem_win0_base = bar0 + MEMWIN0_BASE;
		mem_win1_base = bar0 + MEMWIN1_BASE;
		mem_win2_base = bar0 + MEMWIN2_BASE;
		mem_win2_aperture = MEMWIN2_APERTURE;
	} else {
		/* For T5, only relative offset inside the PCIe BAR is passed */
		mem_win0_base = MEMWIN0_BASE;
		mem_win1_base = MEMWIN1_BASE;
		mem_win2_base = MEMWIN2_BASE_T5;
		mem_win2_aperture = MEMWIN2_APERTURE_T5;
	}

	t4_write_reg(sc, PCIE_MEM_ACCESS_REG(A_PCIE_MEM_ACCESS_BASE_WIN, 0),
	    mem_win0_base | V_BIR(0) |
	    V_WINDOW(ilog2(MEMWIN0_APERTURE) - 10));

	t4_write_reg(sc, PCIE_MEM_ACCESS_REG(A_PCIE_MEM_ACCESS_BASE_WIN, 1),
	    mem_win1_base | V_BIR(0) |
	    V_WINDOW(ilog2(MEMWIN1_APERTURE) - 10));

	t4_write_reg(sc, PCIE_MEM_ACCESS_REG(A_PCIE_MEM_ACCESS_BASE_WIN, 2),
	    mem_win2_base | V_BIR(0) |
	    V_WINDOW(ilog2(mem_win2_aperture) - 10));

	/* flush */
	(void) t4_read_reg(sc,
	    PCIE_MEM_ACCESS_REG(A_PCIE_MEM_ACCESS_BASE_WIN, 2));
}

/*
 * Positions the memory window such that it can be used to access the specified
 * address in the chip's address space.  The return value is the offset of addr
 * from the start of the window.
 */
static uint32_t
t4_position_memwin(struct adapter *sc, int n, uint32_t addr)
{
	uint32_t start, pf;
	uint32_t reg;

	if (addr & 3) {
		cxgb_printf(sc->dip, CE_WARN,
		    "addr (0x%x) is not at a 4B boundary.\n", addr);
		return (EFAULT);
	}

	if (t4_cver_eq(sc, CHELSIO_T4)) {
		pf = 0;
		start = addr & ~0xf;    /* start must be 16B aligned */
	} else {
		pf = V_PFNUM(sc->pf);
		start = addr & ~0x7f;   /* start must be 128B aligned */
	}
	reg = PCIE_MEM_ACCESS_REG(A_PCIE_MEM_ACCESS_OFFSET, n);

	t4_write_reg(sc, reg, start | pf);
	(void) t4_read_reg(sc, reg);

	return (addr - start);
}

static int
prop_lookup_int(struct adapter *sc, char *name, int defval)
{
	int rc;

	rc = ddi_prop_get_int(sc->dev, sc->dip, DDI_PROP_DONTPASS, name, -1);
	if (rc != -1)
		return (rc);

	return (ddi_prop_get_int(DDI_DEV_T_ANY, sc->dip, DDI_PROP_DONTPASS,
	    name, defval));
}

const uint_t t4_holdoff_timer_default[SGE_NTIMERS] = {5, 10, 20, 50, 100, 200};
const uint_t t4_holdoff_pktcnt_default[SGE_NCOUNTERS] = {1, 8, 16, 32};

static int
init_driver_props(struct adapter *sc, struct driver_properties *p)
{
	dev_t dev = sc->dev;
	dev_info_t *dip = sc->dip;
	int i;

	/*
	 * For now, just use the defaults for the hold-off timers and counters.
	 *
	 * They can be turned back into writable properties if/when there is a
	 * demonstrable need.
	 */
	for (uint_t i = 0; i < SGE_NTIMERS; i++) {
		p->holdoff_timer_us[i] = t4_holdoff_timer_default[i];
	}
	for (uint_t i = 0; i < SGE_NCOUNTERS; i++) {
		p->holdoff_pktcnt[i] = t4_holdoff_pktcnt_default[i];
	}
	(void) ddi_prop_update_int_array(dev, dip, "holdoff-timer-us-values",
	    (int *)p->holdoff_timer_us, SGE_NTIMERS);
	(void) ddi_prop_update_int_array(dev, dip, "holdoff-pkt-counter-values",
	    (int *)p->holdoff_pktcnt, SGE_NCOUNTERS);

	/*
	 * Maximum # of tx and rx queues to use for each
	 * 100G, 40G, 25G, 10G and 1G port.
	 */
	p->max_ntxq_10g = prop_lookup_int(sc, "max-ntxq-10G-port", 8);
	(void) ddi_prop_update_int(dev, dip, "max-ntxq-10G-port",
	    p->max_ntxq_10g);

	p->max_nrxq_10g = prop_lookup_int(sc, "max-nrxq-10G-port", 8);
	(void) ddi_prop_update_int(dev, dip, "max-nrxq-10G-port",
	    p->max_nrxq_10g);

	p->max_ntxq_1g = prop_lookup_int(sc, "max-ntxq-1G-port", 2);
	(void) ddi_prop_update_int(dev, dip, "max-ntxq-1G-port",
	    p->max_ntxq_1g);

	p->max_nrxq_1g = prop_lookup_int(sc, "max-nrxq-1G-port", 2);
	(void) ddi_prop_update_int(dev, dip, "max-nrxq-1G-port",
	    p->max_nrxq_1g);

	/*
	 * Holdoff parameters for 10G and 1G ports.
	 */
	p->tmr_idx_10g = prop_lookup_int(sc, "holdoff-timer-idx-10G", 0);
	(void) ddi_prop_update_int(dev, dip, "holdoff-timer-idx-10G",
	    p->tmr_idx_10g);

	p->pktc_idx_10g = prop_lookup_int(sc, "holdoff-pktc-idx-10G", 2);
	(void) ddi_prop_update_int(dev, dip, "holdoff-pktc-idx-10G",
	    p->pktc_idx_10g);

	p->tmr_idx_1g = prop_lookup_int(sc, "holdoff-timer-idx-1G", 0);
	(void) ddi_prop_update_int(dev, dip, "holdoff-timer-idx-1G",
	    p->tmr_idx_1g);

	p->pktc_idx_1g = prop_lookup_int(sc, "holdoff-pktc-idx-1G", 2);
	(void) ddi_prop_update_int(dev, dip, "holdoff-pktc-idx-1G",
	    p->pktc_idx_1g);

	/*
	 * Size (number of entries) of each tx and rx queue.
	 */
	i = prop_lookup_int(sc, "qsize-txq", TX_EQ_QSIZE);
	p->qsize_txq = max(i, 128);
	if (p->qsize_txq != i) {
		cxgb_printf(dip, CE_WARN,
		    "using %d instead of %d as the tx queue size",
		    p->qsize_txq, i);
	}
	(void) ddi_prop_update_int(dev, dip, "qsize-txq", p->qsize_txq);

	i = prop_lookup_int(sc, "qsize-rxq", RX_IQ_QSIZE);
	p->qsize_rxq = max(i, 128);
	while (p->qsize_rxq & 7)
		p->qsize_rxq--;
	if (p->qsize_rxq != i) {
		cxgb_printf(dip, CE_WARN,
		    "using %d instead of %d as the rx queue size",
		    p->qsize_rxq, i);
	}
	(void) ddi_prop_update_int(dev, dip, "qsize-rxq", p->qsize_rxq);

	/*
	 * Interrupt types allowed.
	 * Bits 0, 1, 2 = INTx, MSI, MSI-X respectively.  See sys/ddi_intr.h
	 */
	p->intr_types = prop_lookup_int(sc, "interrupt-types",
	    DDI_INTR_TYPE_MSIX | DDI_INTR_TYPE_MSI | DDI_INTR_TYPE_FIXED);
	(void) ddi_prop_update_int(dev, dip, "interrupt-types", p->intr_types);

	/*
	 * Write combining
	 * 0 to disable, 1 to enable
	 */
	p->wc = prop_lookup_int(sc, "write-combine", 1);
	cxgb_printf(dip, CE_WARN, "write-combine: using of %d", p->wc);
	if (p->wc != 0 && p->wc != 1) {
		cxgb_printf(dip, CE_WARN,
		    "write-combine: using 1 instead of %d", p->wc);
		p->wc = 1;
	}
	(void) ddi_prop_update_int(dev, dip, "write-combine", p->wc);

	p->t4_fw_install = prop_lookup_int(sc, "t4_fw_install", 1);
	if (p->t4_fw_install != 0 && p->t4_fw_install != 2)
		p->t4_fw_install = 1;
	(void) ddi_prop_update_int(dev, dip, "t4_fw_install", p->t4_fw_install);

	/* Multiple Rings */
	p->multi_rings = prop_lookup_int(sc, "multi-rings", 1);
	if (p->multi_rings != 0 && p->multi_rings != 1) {
		cxgb_printf(dip, CE_NOTE,
		    "multi-rings: using value 1 instead of %d", p->multi_rings);
		p->multi_rings = 1;
	}

	(void) ddi_prop_update_int(dev, dip, "multi-rings", p->multi_rings);

	return (0);
}

static int
remove_extra_props(struct adapter *sc, int n10g, int n1g)
{
	if (n10g == 0) {
		(void) ddi_prop_remove(sc->dev, sc->dip, "max-ntxq-10G-port");
		(void) ddi_prop_remove(sc->dev, sc->dip, "max-nrxq-10G-port");
		(void) ddi_prop_remove(sc->dev, sc->dip,
		    "holdoff-timer-idx-10G");
		(void) ddi_prop_remove(sc->dev, sc->dip,
		    "holdoff-pktc-idx-10G");
	}

	if (n1g == 0) {
		(void) ddi_prop_remove(sc->dev, sc->dip, "max-ntxq-1G-port");
		(void) ddi_prop_remove(sc->dev, sc->dip, "max-nrxq-1G-port");
		(void) ddi_prop_remove(sc->dev, sc->dip,
		    "holdoff-timer-idx-1G");
		(void) ddi_prop_remove(sc->dev, sc->dip, "holdoff-pktc-idx-1G");
	}

	return (0);
}

static int
cfg_itype_and_nqueues(struct adapter *sc, int n10g, int n1g,
    struct intrs_and_queues *iaq)
{
	struct driver_properties *p = &sc->props;
	int rc, itype, itypes, navail, nc, n;
	int pfres_rxq, pfres_txq, pfresq;

	bzero(iaq, sizeof (*iaq));
	nc = ncpus;	/* our snapshot of the number of CPUs */
	iaq->ntxq10g = min(nc, p->max_ntxq_10g);
	iaq->ntxq1g = min(nc, p->max_ntxq_1g);
	iaq->nrxq10g = min(nc, p->max_nrxq_10g);
	iaq->nrxq1g = min(nc, p->max_nrxq_1g);

	pfres_rxq = iaq->nrxq10g * n10g + iaq->nrxq1g * n1g;
	pfres_txq = iaq->ntxq10g * n10g + iaq->ntxq1g * n1g;

	/*
	 * If current configuration of max number of Rxqs and Txqs exceed
	 * the max available for all the ports under this PF, then shrink
	 * the queues to max available. Reduce them in a way that each
	 * port under this PF has equally distributed number of queues.
	 * Must guarantee at least 1 queue for each port for both NIC
	 * and Offload queues.
	 *
	 * neq - fixed max number of Egress queues on Tx path and Free List
	 * queues that hold Rx payload data on Rx path. Half are reserved
	 * for Egress queues and the other half for Free List queues.
	 * Hence, the division by 2.
	 *
	 * niqflint - max number of Ingress queues with interrupts on Rx
	 * path to receive completions that indicate Rx payload has been
	 * posted in its associated Free List queue. Also handles Tx
	 * completions for packets successfully transmitted on Tx path.
	 *
	 * nethctrl - max number of Egress queues only for Tx path. This
	 * number is usually half of neq. However, if it became less than
	 * neq due to lack of resources based on firmware configuration,
	 * then take the lower value.
	 */
	const uint_t max_rxq =
	    MIN(sc->params.pfres.neq / 2, sc->params.pfres.niqflint);
	while (pfres_rxq > max_rxq) {
		pfresq = pfres_rxq;

		if (iaq->nrxq10g > 1) {
			iaq->nrxq10g--;
			pfres_rxq -= n10g;
		}

		if (iaq->nrxq1g > 1) {
			iaq->nrxq1g--;
			pfres_rxq -= n1g;
		}

		/* Break if nothing changed */
		if (pfresq == pfres_rxq)
			break;
	}

	const uint_t max_txq =
	    MIN(sc->params.pfres.neq / 2, sc->params.pfres.nethctrl);
	while (pfres_txq > max_txq) {
		pfresq = pfres_txq;

		if (iaq->ntxq10g > 1) {
			iaq->ntxq10g--;
			pfres_txq -= n10g;
		}

		if (iaq->ntxq1g > 1) {
			iaq->ntxq1g--;
			pfres_txq -= n1g;
		}

		/* Break if nothing changed */
		if (pfresq == pfres_txq)
			break;
	}

	rc = ddi_intr_get_supported_types(sc->dip, &itypes);
	if (rc != DDI_SUCCESS) {
		cxgb_printf(sc->dip, CE_WARN,
		    "failed to determine supported interrupt types: %d", rc);
		return (rc);
	}

	for (itype = DDI_INTR_TYPE_MSIX; itype; itype >>= 1) {
		ASSERT(itype == DDI_INTR_TYPE_MSIX ||
		    itype == DDI_INTR_TYPE_MSI ||
		    itype == DDI_INTR_TYPE_FIXED);

		if ((itype & itypes & p->intr_types) == 0)
			continue;	/* not supported or not allowed */

		navail = 0;
		rc = ddi_intr_get_navail(sc->dip, itype, &navail);
		if (rc != DDI_SUCCESS || navail == 0) {
			cxgb_printf(sc->dip, CE_WARN,
			    "failed to get # of interrupts for type %d: %d",
			    itype, rc);
			continue;	/* carry on */
		}

		iaq->intr_type = itype;
		if (navail == 0)
			continue;

		/*
		 * Best option: an interrupt vector for errors, one for the
		 * firmware event queue, and one each for each rxq (NIC as well
		 * as offload).
		 */
		iaq->nirq = T4_EXTRA_INTR;
		iaq->nirq += n10g * iaq->nrxq10g;
		iaq->nirq += n1g * iaq->nrxq1g;

		if (iaq->nirq <= navail &&
		    (itype != DDI_INTR_TYPE_MSI || ISP2(iaq->nirq))) {
			iaq->intr_fwd = 0;
			goto allocate;
		}

		/*
		 * Second best option: an interrupt vector for errors, one for
		 * the firmware event queue, and one each for either NIC or
		 * offload rxq's.
		 */
		iaq->nirq = T4_EXTRA_INTR;
		iaq->nirq += n10g * iaq->nrxq10g;
		iaq->nirq += n1g * iaq->nrxq1g;
		if (iaq->nirq <= navail &&
		    (itype != DDI_INTR_TYPE_MSI || ISP2(iaq->nirq))) {
			iaq->intr_fwd = 1;
			goto allocate;
		}

		/*
		 * Next best option: an interrupt vector for errors, one for the
		 * firmware event queue, and at least one per port.  At this
		 * point we know we'll have to downsize nrxq or nofldrxq to fit
		 * what's available to us.
		 */
		iaq->nirq = T4_EXTRA_INTR;
		iaq->nirq += n10g + n1g;
		if (iaq->nirq <= navail) {
			int leftover = navail - iaq->nirq;

			if (n10g > 0) {
				int target = iaq->nrxq10g;

				n = 1;
				while (n < target && leftover >= n10g) {
					leftover -= n10g;
					iaq->nirq += n10g;
					n++;
				}
				iaq->nrxq10g = min(n, iaq->nrxq10g);
			}

			if (n1g > 0) {
				int target = iaq->nrxq1g;

				n = 1;
				while (n < target && leftover >= n1g) {
					leftover -= n1g;
					iaq->nirq += n1g;
					n++;
				}
				iaq->nrxq1g = min(n, iaq->nrxq1g);
			}

			/*
			 * We have arrived at a minimum value required to enable
			 * per queue irq(either NIC or offload). Thus for non-
			 * offload case, we will get a vector per queue, while
			 * offload case, we will get a vector per offload/NIC q.
			 * Hence enable Interrupt forwarding only for offload
			 * case.
			 */
			if (itype != DDI_INTR_TYPE_MSI) {
				goto allocate;
			}
		}

		/*
		 * Least desirable option: one interrupt vector for everything.
		 */
		iaq->nirq = iaq->nrxq10g = iaq->nrxq1g = 1;
		iaq->intr_fwd = 1;

allocate:
		return (0);
	}

	cxgb_printf(sc->dip, CE_WARN,
	    "failed to find a usable interrupt type.  supported=%d, allowed=%d",
	    itypes, p->intr_types);
	return (DDI_FAILURE);
}

static int
add_child_node(struct adapter *sc, int idx)
{
	int rc;
	struct port_info *pi;

	if (idx < 0 || idx >= sc->params.nports)
		return (EINVAL);

	pi = sc->port[idx];
	if (pi == NULL)
		return (ENODEV);	/* t4_port_init failed earlier */

	PORT_LOCK(pi);
	if (pi->dip != NULL) {
		rc = 0;		/* EEXIST really, but then bus_config fails */
		goto done;
	}

	rc = ndi_devi_alloc(sc->dip, T4_PORT_NAME, DEVI_SID_NODEID, &pi->dip);
	if (rc != DDI_SUCCESS || pi->dip == NULL) {
		rc = ENOMEM;
		goto done;
	}

	(void) ddi_set_parent_data(pi->dip, pi);
	(void) ndi_devi_bind_driver(pi->dip, 0);
	rc = 0;
done:
	PORT_UNLOCK(pi);
	return (rc);
}

static int
remove_child_node(struct adapter *sc, int idx)
{
	int rc;
	struct port_info *pi;

	if (idx < 0 || idx >= sc->params.nports)
		return (EINVAL);

	pi = sc->port[idx];
	if (pi == NULL)
		return (ENODEV);

	PORT_LOCK(pi);
	if (pi->dip == NULL) {
		rc = ENODEV;
		goto done;
	}

	rc = ndi_devi_free(pi->dip);
	if (rc == 0)
		pi->dip = NULL;
done:
	PORT_UNLOCK(pi);
	return (rc);
}

static const char *
t4_port_speed_name(const struct port_info *pi)
{
	if (pi == NULL) {
		return ("-");
	}

	const uint32_t pcaps = pi->link_cfg.pcaps;
	if (pcaps & FW_PORT_CAP32_SPEED_100G) {
		return ("100G");
	} else if (pcaps & FW_PORT_CAP32_SPEED_50G) {
		return ("50G");
	} else if (pcaps & FW_PORT_CAP32_SPEED_40G) {
		return ("40G");
	} else if (pcaps & FW_PORT_CAP32_SPEED_25G) {
		return ("25G");
	} else if (pcaps & FW_PORT_CAP32_SPEED_10G) {
		return ("10G");
	} else {
		return ("1G");
	}
}

#define	KS_UINIT(x)	kstat_named_init(&kstatp->x, #x, KSTAT_DATA_ULONG)
#define	KS_CINIT(x)	kstat_named_init(&kstatp->x, #x, KSTAT_DATA_CHAR)
#define	KS_U64INIT(x)	kstat_named_init(&kstatp->x, #x, KSTAT_DATA_UINT64)
#define	KS_U_SET(x, y)	kstatp->x.value.ul = (y)
#define	KS_C_SET(x, ...)	\
			(void) snprintf(kstatp->x.value.c, 16,  __VA_ARGS__)

/*
 * t4nex:X:config
 */
struct t4_kstats {
	kstat_named_t chip_ver;
	kstat_named_t fw_vers;
	kstat_named_t tp_vers;
	kstat_named_t driver_version;
	kstat_named_t serial_number;
	kstat_named_t ec_level;
	kstat_named_t id;
	kstat_named_t bus_type;
	kstat_named_t bus_width;
	kstat_named_t bus_speed;
	kstat_named_t core_clock;
	kstat_named_t port_cnt;
	kstat_named_t port_type;
	kstat_named_t pci_vendor_id;
	kstat_named_t pci_device_id;
};
static kstat_t *
setup_kstats(struct adapter *sc)
{
	kstat_t *ksp;
	struct t4_kstats *kstatp;
	int ndata;
	struct pci_params *p = &sc->params.pci;
	struct vpd_params *v = &sc->params.vpd;
	uint16_t pci_vendor, pci_device;

	ndata = sizeof (struct t4_kstats) / sizeof (kstat_named_t);

	ksp = kstat_create(T4_NEXUS_NAME, ddi_get_instance(sc->dip), "config",
	    "nexus", KSTAT_TYPE_NAMED, ndata, 0);
	if (ksp == NULL) {
		cxgb_printf(sc->dip, CE_WARN, "failed to initialize kstats.");
		return (NULL);
	}

	kstatp = (struct t4_kstats *)ksp->ks_data;

	KS_UINIT(chip_ver);
	KS_CINIT(fw_vers);
	KS_CINIT(tp_vers);
	KS_CINIT(driver_version);
	KS_CINIT(serial_number);
	KS_CINIT(ec_level);
	KS_CINIT(id);
	KS_CINIT(bus_type);
	KS_CINIT(bus_width);
	KS_CINIT(bus_speed);
	KS_UINIT(core_clock);
	KS_UINIT(port_cnt);
	KS_CINIT(port_type);
	KS_CINIT(pci_vendor_id);
	KS_CINIT(pci_device_id);

	KS_U_SET(chip_ver, sc->params.chip);
	KS_C_SET(fw_vers, "%d.%d.%d.%d",
	    G_FW_HDR_FW_VER_MAJOR(sc->params.fw_vers),
	    G_FW_HDR_FW_VER_MINOR(sc->params.fw_vers),
	    G_FW_HDR_FW_VER_MICRO(sc->params.fw_vers),
	    G_FW_HDR_FW_VER_BUILD(sc->params.fw_vers));
	KS_C_SET(tp_vers, "%d.%d.%d.%d",
	    G_FW_HDR_FW_VER_MAJOR(sc->params.tp_vers),
	    G_FW_HDR_FW_VER_MINOR(sc->params.tp_vers),
	    G_FW_HDR_FW_VER_MICRO(sc->params.tp_vers),
	    G_FW_HDR_FW_VER_BUILD(sc->params.tp_vers));
	KS_C_SET(driver_version, DRV_VERSION);
	KS_C_SET(serial_number, "%s", v->sn);
	KS_C_SET(ec_level, "%s", v->ec);
	KS_C_SET(id, "%s", v->id);
	KS_C_SET(bus_type, "pci-express");
	KS_C_SET(bus_width, "x%d lanes", p->width);
	KS_C_SET(bus_speed, "%d", p->speed);
	KS_U_SET(core_clock, v->cclk);
	KS_U_SET(port_cnt, sc->params.nports);

	pci_vendor = pci_config_get16(sc->pci_regh, PCI_CONF_VENID);
	KS_C_SET(pci_vendor_id, "0x%x", pci_vendor);

	pci_device = pci_config_get16(sc->pci_regh, PCI_CONF_DEVID);
	KS_C_SET(pci_device_id, "0x%x", pci_device);

	KS_C_SET(port_type, "%s/%s/%s/%s",
	    t4_port_speed_name(sc->port[0]),
	    t4_port_speed_name(sc->port[1]),
	    t4_port_speed_name(sc->port[2]),
	    t4_port_speed_name(sc->port[3]));

	/* Do NOT set ksp->ks_update.  These kstats do not change. */

	/* Install the kstat */
	ksp->ks_private = (void *)sc;
	kstat_install(ksp);

	return (ksp);
}

/*
 * t4nex:X:stat
 */
struct t4_wc_kstats {
	kstat_named_t write_coal_success;
	kstat_named_t write_coal_failure;
};
static kstat_t *
setup_wc_kstats(struct adapter *sc)
{
	kstat_t *ksp;
	struct t4_wc_kstats *kstatp;

	const uint_t ndata =
	    sizeof (struct t4_wc_kstats) / sizeof (kstat_named_t);
	ksp = kstat_create(T4_NEXUS_NAME, ddi_get_instance(sc->dip), "stats",
	    "nexus", KSTAT_TYPE_NAMED, ndata, 0);
	if (ksp == NULL) {
		cxgb_printf(sc->dip, CE_WARN, "failed to initialize kstats.");
		return (NULL);
	}

	kstatp = (struct t4_wc_kstats *)ksp->ks_data;

	KS_UINIT(write_coal_success);
	KS_UINIT(write_coal_failure);

	ksp->ks_update = update_wc_kstats;
	/* Install the kstat */
	ksp->ks_private = (void *)sc;
	kstat_install(ksp);

	return (ksp);
}

static int
update_wc_kstats(kstat_t *ksp, int rw)
{
	struct t4_wc_kstats *kstatp = (struct t4_wc_kstats *)ksp->ks_data;
	struct adapter *sc = ksp->ks_private;
	uint32_t wc_total, wc_success, wc_failure;

	if (rw == KSTAT_WRITE)
		return (0);

	if (t4_cver_ge(sc, CHELSIO_T5)) {
		wc_total = t4_read_reg(sc, A_SGE_STAT_TOTAL);
		wc_failure = t4_read_reg(sc, A_SGE_STAT_MATCH);
		wc_success = wc_total - wc_failure;
	} else {
		wc_success = 0;
		wc_failure = 0;
	}

	KS_U_SET(write_coal_success, wc_success);
	KS_U_SET(write_coal_failure, wc_failure);

	return (0);
}

/*
 * cxgbe:X:fec
 *
 * This provides visibility into the errors that have been found by the
 * different FEC subsystems. While it's tempting to combine the two different
 * FEC types logically, the data that the errors tell us are pretty different
 * between the two. Firecode is strictly per-lane, but RS has parts that are
 * related to symbol distribution to lanes and also to the overall channel.
 */
struct cxgbe_port_fec_kstats {
	kstat_named_t rs_corr;
	kstat_named_t rs_uncorr;
	kstat_named_t rs_sym0_corr;
	kstat_named_t rs_sym1_corr;
	kstat_named_t rs_sym2_corr;
	kstat_named_t rs_sym3_corr;
	kstat_named_t fc_lane0_corr;
	kstat_named_t fc_lane0_uncorr;
	kstat_named_t fc_lane1_corr;
	kstat_named_t fc_lane1_uncorr;
	kstat_named_t fc_lane2_corr;
	kstat_named_t fc_lane2_uncorr;
	kstat_named_t fc_lane3_corr;
	kstat_named_t fc_lane3_uncorr;
};

static uint32_t
read_fec_pair(struct port_info *pi, uint32_t lo_reg, uint32_t high_reg)
{
	struct adapter *sc = pi->adapter;
	uint8_t port = pi->tx_chan;
	uint32_t low, high, ret;

	low = t4_read_reg(sc, T5_PORT_REG(port, lo_reg));
	high = t4_read_reg(sc, T5_PORT_REG(port, high_reg));
	ret = low & 0xffff;
	ret |= (high & 0xffff) << 16;
	return (ret);
}

static int
update_port_fec_kstats(kstat_t *ksp, int rw)
{
	struct cxgbe_port_fec_kstats *fec = ksp->ks_data;
	struct port_info *pi = ksp->ks_private;

	if (rw == KSTAT_WRITE) {
		return (EACCES);
	}

	/*
	 * First go ahead and gather RS related stats.
	 */
	fec->rs_corr.value.ui64 += read_fec_pair(pi, T6_RS_FEC_CCW_LO,
	    T6_RS_FEC_CCW_HI);
	fec->rs_uncorr.value.ui64 += read_fec_pair(pi, T6_RS_FEC_NCCW_LO,
	    T6_RS_FEC_NCCW_HI);
	fec->rs_sym0_corr.value.ui64 += read_fec_pair(pi, T6_RS_FEC_SYMERR0_LO,
	    T6_RS_FEC_SYMERR0_HI);
	fec->rs_sym1_corr.value.ui64 += read_fec_pair(pi, T6_RS_FEC_SYMERR1_LO,
	    T6_RS_FEC_SYMERR1_HI);
	fec->rs_sym2_corr.value.ui64 += read_fec_pair(pi, T6_RS_FEC_SYMERR2_LO,
	    T6_RS_FEC_SYMERR2_HI);
	fec->rs_sym3_corr.value.ui64 += read_fec_pair(pi, T6_RS_FEC_SYMERR3_LO,
	    T6_RS_FEC_SYMERR3_HI);

	/*
	 * Now go through and try to grab Firecode/BASE-R stats.
	 */
	fec->fc_lane0_corr.value.ui64 += read_fec_pair(pi, T6_FC_FEC_L0_CERR_LO,
	    T6_FC_FEC_L0_CERR_HI);
	fec->fc_lane0_uncorr.value.ui64 += read_fec_pair(pi,
	    T6_FC_FEC_L0_NCERR_LO, T6_FC_FEC_L0_NCERR_HI);
	fec->fc_lane1_corr.value.ui64 += read_fec_pair(pi, T6_FC_FEC_L1_CERR_LO,
	    T6_FC_FEC_L1_CERR_HI);
	fec->fc_lane1_uncorr.value.ui64 += read_fec_pair(pi,
	    T6_FC_FEC_L1_NCERR_LO, T6_FC_FEC_L1_NCERR_HI);
	fec->fc_lane2_corr.value.ui64 += read_fec_pair(pi, T6_FC_FEC_L2_CERR_LO,
	    T6_FC_FEC_L2_CERR_HI);
	fec->fc_lane2_uncorr.value.ui64 += read_fec_pair(pi,
	    T6_FC_FEC_L2_NCERR_LO, T6_FC_FEC_L2_NCERR_HI);
	fec->fc_lane3_corr.value.ui64 += read_fec_pair(pi, T6_FC_FEC_L3_CERR_LO,
	    T6_FC_FEC_L3_CERR_HI);
	fec->fc_lane3_uncorr.value.ui64 += read_fec_pair(pi,
	    T6_FC_FEC_L3_NCERR_LO, T6_FC_FEC_L3_NCERR_HI);

	return (0);
}

static kstat_t *
setup_port_fec_kstats(struct port_info *pi)
{
	kstat_t *ksp;
	struct cxgbe_port_fec_kstats *kstatp;

	if (!t4_cver_ge(pi->adapter, CHELSIO_T6)) {
		return (NULL);
	}

	ksp = kstat_create(T4_PORT_NAME, ddi_get_instance(pi->dip), "fec",
	    "net", KSTAT_TYPE_NAMED, sizeof (struct cxgbe_port_fec_kstats) /
	    sizeof (kstat_named_t), 0);
	if (ksp == NULL) {
		cxgb_printf(pi->dip, CE_WARN, "failed to initialize fec "
		    "kstats.");
		return (NULL);
	}

	kstatp = ksp->ks_data;
	KS_U64INIT(rs_corr);
	KS_U64INIT(rs_uncorr);
	KS_U64INIT(rs_sym0_corr);
	KS_U64INIT(rs_sym1_corr);
	KS_U64INIT(rs_sym2_corr);
	KS_U64INIT(rs_sym3_corr);
	KS_U64INIT(fc_lane0_corr);
	KS_U64INIT(fc_lane0_uncorr);
	KS_U64INIT(fc_lane1_corr);
	KS_U64INIT(fc_lane1_uncorr);
	KS_U64INIT(fc_lane2_corr);
	KS_U64INIT(fc_lane2_uncorr);
	KS_U64INIT(fc_lane3_corr);
	KS_U64INIT(fc_lane3_uncorr);

	ksp->ks_update = update_port_fec_kstats;
	ksp->ks_private = pi;
	kstat_install(ksp);

	return (ksp);
}

int
t4_port_full_init(struct port_info *pi)
{
	struct adapter *sc = pi->adapter;
	uint16_t *rss;
	struct sge_rxq *rxq;
	int rc, i;

	ASSERT((pi->flags & TPF_INIT_DONE) == 0);

	/*
	 * Allocate tx/rx/fl queues for this port.
	 */
	rc = t4_setup_port_queues(pi);
	if (rc != 0)
		goto done;	/* error message displayed already */

	/*
	 * Setup RSS for this port.
	 */
	rss = kmem_zalloc(pi->nrxq * sizeof (*rss), KM_SLEEP);
	for_each_rxq(pi, i, rxq) {
		rss[i] = rxq->iq.abs_id;
	}
	rc = -t4_config_rss_range(sc, sc->mbox, pi->viid, 0,
	    pi->rss_size, rss, pi->nrxq);
	kmem_free(rss, pi->nrxq * sizeof (*rss));
	if (rc != 0) {
		cxgb_printf(pi->dip, CE_WARN, "rss_config failed: %d", rc);
		goto done;
	}

	/*
	 * Initialize our per-port FEC kstats.
	 */
	pi->ksp_fec = setup_port_fec_kstats(pi);

	pi->flags |= TPF_INIT_DONE;
done:
	if (rc != 0)
		(void) t4_port_full_uninit(pi);

	return (rc);
}

/*
 * Idempotent.
 */
static int
t4_port_full_uninit(struct port_info *pi)
{

	ASSERT(pi->flags & TPF_INIT_DONE);

	if (pi->ksp_fec != NULL) {
		kstat_delete(pi->ksp_fec);
		pi->ksp_fec = NULL;
	}
	(void) t4_teardown_port_queues(pi);
	pi->flags &= ~TPF_INIT_DONE;

	return (0);
}

void
t4_port_queues_enable(struct port_info *pi)
{
	ASSERT(pi->flags & TPF_INIT_DONE);

	/*
	 * TODO: whatever was queued up after we set iq->state to IQS_DISABLED
	 * back in t4_port_queues_disable will be processed now, after an
	 * unbounded delay.  This can't be good.
	 */

	int i;
	struct adapter *sc = pi->adapter;
	struct sge_rxq *rxq;

	mutex_enter(&sc->sfl_lock);
	for_each_rxq(pi, i, rxq) {
		struct sge_iq *iq = &rxq->iq;

		if (atomic_cas_uint(&iq->state, IQS_DISABLED, IQS_IDLE) !=
		    IQS_DISABLED)
			panic("%s: iq %p wasn't disabled", __func__,
			    (void *) iq);

		/*
		 * Freelists which were marked "doomed" by a previous
		 * t4_port_queues_disable() call should clear that status.
		 */
		rxq->fl.flags &= ~FL_DOOMED;

		t4_iq_gts_update(iq, iq->intr_params, 0);

	}
	mutex_exit(&sc->sfl_lock);
}

void
t4_port_queues_disable(struct port_info *pi)
{
	int i;
	struct adapter *sc = pi->adapter;
	struct sge_rxq *rxq;

	ASSERT(pi->flags & TPF_INIT_DONE);

	/*
	 * TODO: need proper implementation for all tx queues (ctrl, eth, ofld).
	 */

	for_each_rxq(pi, i, rxq) {
		while (atomic_cas_uint(&rxq->iq.state, IQS_IDLE,
		    IQS_DISABLED) != IQS_IDLE)
			msleep(1);
	}

	mutex_enter(&sc->sfl_lock);
	for_each_rxq(pi, i, rxq) {
		rxq->fl.flags |= FL_DOOMED;
	}
	mutex_exit(&sc->sfl_lock);
	/* TODO: need to wait for all fl's to be removed from sc->sfl */
}

void
t4_fatal_err(struct adapter *sc)
{
	t4_set_reg_field(sc, A_SGE_CONTROL, F_GLOBALENABLE, 0);
	t4_intr_disable(sc);
	cxgb_printf(sc->dip, CE_WARN,
	    "encountered fatal error, adapter stopped.");
}

int
t4_os_find_pci_capability(struct adapter *sc, uint8_t cap)
{
	const uint16_t stat = pci_config_get16(sc->pci_regh, PCI_CONF_STAT);
	if ((stat & PCI_STAT_CAP) == 0) {
		return (0);
	}

	uint8_t cap_ptr = pci_config_get8(sc->pci_regh, PCI_CONF_CAP_PTR);
	while (cap_ptr) {
		uint8_t cap_id =
		    pci_config_get8(sc->pci_regh, cap_ptr + PCI_CAP_ID);
		if (cap_id == cap) {
			return (cap_ptr);
		}
		cap_ptr =
		    pci_config_get8(sc->pci_regh, cap_ptr + PCI_CAP_NEXT_PTR);
	}

	return (0);
}

void
t4_os_portmod_changed(struct adapter *sc, int idx)
{
	static const char *mod_str[] = {
		NULL, "LR", "SR", "ER", "TWINAX", "active TWINAX", "LRM"
	};
	struct port_info *pi = sc->port[idx];

	if (pi->mod_type == FW_PORT_MOD_TYPE_NONE)
		cxgb_printf(pi->dip, CE_NOTE, "transceiver unplugged.");
	else if (pi->mod_type == FW_PORT_MOD_TYPE_UNKNOWN)
		cxgb_printf(pi->dip, CE_NOTE,
		    "unknown transceiver inserted.\n");
	else if (pi->mod_type == FW_PORT_MOD_TYPE_NOTSUPPORTED)
		cxgb_printf(pi->dip, CE_NOTE,
		    "unsupported transceiver inserted.\n");
	else if (pi->mod_type > 0 && pi->mod_type < ARRAY_SIZE(mod_str))
		cxgb_printf(pi->dip, CE_NOTE, "%s transceiver inserted.\n",
		    mod_str[pi->mod_type]);
	else
		cxgb_printf(pi->dip, CE_NOTE, "transceiver (type %d) inserted.",
		    pi->mod_type);

	if ((pi->flags & TPF_OPEN) != 0 && pi->link_cfg.new_module) {
		pi->link_cfg.redo_l1cfg = true;
	}
}

void
t4_os_set_hw_addr(struct adapter *sc, int idx, const uint8_t *hw_addr)
{
	bcopy(hw_addr, sc->port[idx]->hw_addr, ETHERADDRL);
}

uint32_t
t4_read_reg(struct adapter *sc, uint32_t reg)
{
	const uint32_t val = ddi_get32(sc->regh, (uint32_t *)(sc->regp + reg));
	DTRACE_PROBE3(t4__reg__read, struct adapter *, sc, uint32_t, reg,
	    uint64_t, val);
	return (val);
}

void
t4_write_reg(struct adapter *sc, uint32_t reg, uint32_t val)
{
	DTRACE_PROBE3(t4__reg__write, struct adapter *, sc, uint32_t, reg,
	    uint64_t, val);
	ddi_put32(sc->regh, (uint32_t *)(sc->regp + reg), val);
}

uint64_t
t4_read_reg64(struct adapter *sc, uint32_t reg)
{
	const uint64_t val = ddi_get64(sc->regh, (uint64_t *)(sc->regp + reg));
	DTRACE_PROBE3(t4__reg__read, struct adapter *, sc, uint32_t, reg,
	    uint64_t, val);
	return (val);
}

void
t4_write_reg64(struct adapter *sc, uint32_t reg, uint64_t val)
{
	DTRACE_PROBE3(t4__reg__write, struct adapter *, sc, uint32_t, reg,
	    uint64_t, val);
	ddi_put64(sc->regh, (uint64_t *)(sc->regp + reg), val);
}

static int
t4_sensor_read(struct adapter *sc, uint32_t diag, uint32_t *valp)
{
	int rc;
	uint32_t param, val;

	ADAPTER_LOCK(sc);
	param = V_FW_PARAMS_MNEM(FW_PARAMS_MNEM_DEV) |
	    V_FW_PARAMS_PARAM_X(FW_PARAMS_PARAM_DEV_DIAG) |
	    V_FW_PARAMS_PARAM_Y(diag);
	rc = -t4_query_params(sc, sc->mbox, sc->pf, 0, 1, &param, &val);
	ADAPTER_UNLOCK(sc);

	if (rc != 0) {
		return (rc);
	} else if (val == 0) {
		return (EIO);
	}

	*valp = val;
	return (0);
}

static int
t4_temperature_read(void *arg, sensor_ioctl_scalar_t *scalar)
{
	int ret;
	struct adapter *sc = arg;
	uint32_t val;

	ret = t4_sensor_read(sc, FW_PARAM_DEV_DIAG_TMP, &val);
	if (ret != 0) {
		return (ret);
	}

	/*
	 * The device measures temperature in units of 1 degree Celsius. We
	 * don't know its precision.
	 */
	scalar->sis_unit = SENSOR_UNIT_CELSIUS;
	scalar->sis_gran = 1;
	scalar->sis_prec = 0;
	scalar->sis_value = val;

	return (0);
}

static int
t4_voltage_read(void *arg, sensor_ioctl_scalar_t *scalar)
{
	int ret;
	struct adapter *sc = arg;
	uint32_t val;

	ret = t4_sensor_read(sc, FW_PARAM_DEV_DIAG_VDD, &val);
	if (ret != 0) {
		return (ret);
	}

	scalar->sis_unit = SENSOR_UNIT_VOLTS;
	scalar->sis_gran = 1000;
	scalar->sis_prec = 0;
	scalar->sis_value = val;

	return (0);
}

/*
 * While the hardware supports the ability to read and write the flash image,
 * this is not currently wired up.
 */
static int
t4_ufm_getcaps(ddi_ufm_handle_t *ufmh, void *arg, ddi_ufm_cap_t *caps)
{
	*caps = DDI_UFM_CAP_REPORT;
	return (0);
}

static int
t4_ufm_fill_image(ddi_ufm_handle_t *ufmh, void *arg, uint_t imgno,
    ddi_ufm_image_t *imgp)
{
	if (imgno != 0) {
		return (EINVAL);
	}

	ddi_ufm_image_set_desc(imgp, "Firmware");
	ddi_ufm_image_set_nslots(imgp, 1);

	return (0);
}

static int
t4_ufm_fill_slot_version(nvlist_t *nvl, const char *key, uint32_t vers)
{
	char buf[128];

	if (vers == 0) {
		return (0);
	}

	if (snprintf(buf, sizeof (buf), "%u.%u.%u.%u",
	    G_FW_HDR_FW_VER_MAJOR(vers), G_FW_HDR_FW_VER_MINOR(vers),
	    G_FW_HDR_FW_VER_MICRO(vers), G_FW_HDR_FW_VER_BUILD(vers)) >=
	    sizeof (buf)) {
		return (EOVERFLOW);
	}

	return (nvlist_add_string(nvl, key, buf));
}

static int
t4_ufm_fill_slot(ddi_ufm_handle_t *ufmh, void *arg, uint_t imgno, uint_t slotno,
    ddi_ufm_slot_t *slotp)
{
	int ret;
	struct adapter *sc = arg;
	nvlist_t *misc = NULL;
	char buf[128];

	if (imgno != 0 || slotno != 0) {
		return (EINVAL);
	}

	if (snprintf(buf, sizeof (buf), "%u.%u.%u.%u",
	    G_FW_HDR_FW_VER_MAJOR(sc->params.fw_vers),
	    G_FW_HDR_FW_VER_MINOR(sc->params.fw_vers),
	    G_FW_HDR_FW_VER_MICRO(sc->params.fw_vers),
	    G_FW_HDR_FW_VER_BUILD(sc->params.fw_vers)) >= sizeof (buf)) {
		return (EOVERFLOW);
	}

	ddi_ufm_slot_set_version(slotp, buf);

	(void) nvlist_alloc(&misc, NV_UNIQUE_NAME, KM_SLEEP);
	if ((ret = t4_ufm_fill_slot_version(misc, "TP Microcode",
	    sc->params.tp_vers)) != 0) {
		goto err;
	}

	if ((ret = t4_ufm_fill_slot_version(misc, "Bootstrap",
	    sc->params.bs_vers)) != 0) {
		goto err;
	}

	if ((ret = t4_ufm_fill_slot_version(misc, "Expansion ROM",
	    sc->params.er_vers)) != 0) {
		goto err;
	}

	if ((ret = nvlist_add_uint32(misc, "Serial Configuration",
	    sc->params.scfg_vers)) != 0) {
		goto err;
	}

	if ((ret = nvlist_add_uint32(misc, "VPD Version",
	    sc->params.vpd_vers)) != 0) {
		goto err;
	}

	ddi_ufm_slot_set_misc(slotp, misc);
	ddi_ufm_slot_set_attrs(slotp, DDI_UFM_ATTR_ACTIVE |
	    DDI_UFM_ATTR_WRITEABLE | DDI_UFM_ATTR_READABLE);
	return (0);

err:
	nvlist_free(misc);
	return (ret);

}

int
t4_cxgbe_attach(struct port_info *pi, dev_info_t *dip)
{
	ASSERT(pi != NULL);

	mac_register_t *mac = mac_alloc(MAC_VERSION);
	if (mac == NULL) {
		return (DDI_FAILURE);
	}

	size_t prop_size;
	const char **props = t4_get_priv_props(pi, &prop_size);

	mac->m_type_ident = MAC_PLUGIN_IDENT_ETHER;
	mac->m_driver = pi;
	mac->m_dip = dip;
	mac->m_src_addr = pi->hw_addr;
	mac->m_callbacks = pi->mc;
	mac->m_max_sdu = pi->mtu;
	/* mac_register() treats this as const, so we can cast it away */
	mac->m_priv_props = (char **)props;
	mac->m_margin = VLAN_TAGSZ;

	if (!mac->m_callbacks->mc_unicst) {
		/* Multiple rings enabled */
		mac->m_v12n = MAC_VIRT_LEVEL1;
	}

	mac_handle_t mh = NULL;
	const int rc = mac_register(mac, &mh);
	mac_free(mac);
	kmem_free(props, prop_size);
	if (rc != 0) {
		return (DDI_FAILURE);
	}

	pi->mh = mh;

	/*
	 * Link state from this point onwards to the time interface is plumbed,
	 * should be set to LINK_STATE_UNKNOWN. The mac should be updated about
	 * the link state as either LINK_STATE_UP or LINK_STATE_DOWN based on
	 * the actual link state detection after interface plumb.
	 */
	mac_link_update(mh, LINK_STATE_UNKNOWN);

	return (DDI_SUCCESS);
}

int
t4_cxgbe_detach(struct port_info *pi)
{
	ASSERT(pi != NULL);
	ASSERT(pi->mh != NULL);

	if (mac_unregister(pi->mh) == 0) {
		pi->mh = NULL;
		return (DDI_SUCCESS);
	}

	return (DDI_FAILURE);
}

struct cb_ops t4_cb_ops = {
	.cb_open =		t4_cb_open,
	.cb_close =		t4_cb_close,
	.cb_strategy =		nodev,
	.cb_print =		nodev,
	.cb_dump =		nodev,
	.cb_read =		nodev,
	.cb_write =		nodev,
	.cb_ioctl =		t4_cb_ioctl,
	.cb_devmap =		nodev,
	.cb_mmap =		nodev,
	.cb_segmap =		nodev,
	.cb_chpoll =		nochpoll,
	.cb_prop_op =		ddi_prop_op,
	.cb_flag =		D_MP,
	.cb_rev =		CB_REV,
	.cb_aread =		nodev,
	.cb_awrite =		nodev
};

struct bus_ops t4_bus_ops = {
	.busops_rev =		BUSO_REV,
	.bus_ctl =		t4_bus_ctl,
	.bus_prop_op =		ddi_bus_prop_op,
	.bus_config =		t4_bus_config,
	.bus_unconfig =		t4_bus_unconfig,
};

static struct dev_ops t4_dev_ops = {
	.devo_rev =		DEVO_REV,
	.devo_getinfo =		t4_devo_getinfo,
	.devo_identify =	nulldev,
	.devo_probe =		t4_devo_probe,
	.devo_attach =		t4_devo_attach,
	.devo_detach =		t4_devo_detach,
	.devo_reset =		nodev,
	.devo_cb_ops =		&t4_cb_ops,
	.devo_bus_ops =		&t4_bus_ops,
	.devo_quiesce =		&t4_devo_quiesce,
};

static struct modldrv t4nex_modldrv = {
	.drv_modops =		&mod_driverops,
	.drv_linkinfo =		"Chelsio T4-T6 nexus " DRV_VERSION,
	.drv_dev_ops =		&t4_dev_ops
};

static struct modlinkage t4nex_modlinkage = {
	.ml_rev =		MODREV_1,
	.ml_linkage =		{&t4nex_modldrv, NULL},
};

int
_init(void)
{
	int rc;

	rc = ddi_soft_state_init(&t4_soft_state, sizeof (struct adapter), 0);
	if (rc != 0) {
		return (rc);
	}

	mutex_init(&t4_adapter_list_lock, NULL, MUTEX_DRIVER, NULL);
	list_create(&t4_adapter_list, sizeof (adapter_t),
	    offsetof(adapter_t, node));
	t4_debug_init();

	rc = mod_install(&t4nex_modlinkage);
	if (rc != 0) {
		ddi_soft_state_fini(&t4_soft_state);
		mutex_destroy(&t4_adapter_list_lock);
		list_destroy(&t4_adapter_list);
		t4_debug_fini();
	}

	return (rc);
}

int
_fini(void)
{
	const int rc = mod_remove(&t4nex_modlinkage);
	if (rc != 0) {
		return (rc);
	}

	mutex_destroy(&t4_adapter_list_lock);
	list_destroy(&t4_adapter_list);
	ddi_soft_state_fini(&t4_soft_state);
	t4_debug_fini();

	return (0);
}

int
_info(struct modinfo *mi)
{
	return (mod_info(&t4nex_modlinkage, mi));
}