t4_vf.c

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/*-
 * Copyright (c) 2016 Chelsio Communications, Inc.
 * All rights reserved.
 * Written by: John Baldwin <jhb@FreeBSD.org>
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */
 
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
 
#include "opt_inet.h"
#include "opt_inet6.h"
 
#include <sys/param.h>
#include <sys/bus.h>
#include <sys/conf.h>
#include <sys/kernel.h>
#include <sys/module.h>
#include <sys/priv.h>
#include <dev/pci/pcivar.h>
#if defined(__i386__) || defined(__amd64__)
#include <vm/vm.h>
#include <vm/pmap.h>
#endif
 
#include "common/common.h"
#include "common/t4_regs.h"
#include "t4_ioctl.h"
#include "t4_mp_ring.h"
 
/*
 * Some notes:
 *
 * The Virtual Interfaces are connected to an internal switch on the chip
 * which allows VIs attached to the same port to talk to each other even when
 * the port link is down.  As a result, we might want to always report a
 * VF's link as being "up".
 *
 * XXX: Add a TUNABLE and possible per-device sysctl for this?
 */
 
struct intrs_and_queues {
        uint16_t intr_type;     /* MSI, or MSI-X */
        uint16_t nirq;          /* Total # of vectors */
        uint16_t ntxq;          /* # of NIC txq's for each port */
        uint16_t nrxq;          /* # of NIC rxq's for each port */
};
 
struct {
        uint16_t device;
        char *desc;
} t4vf_pciids[] = {
        {0x4800, "Chelsio T440-dbg VF"},
        {0x4801, "Chelsio T420-CR VF"},
        {0x4802, "Chelsio T422-CR VF"},
        {0x4803, "Chelsio T440-CR VF"},
        {0x4804, "Chelsio T420-BCH VF"},
        {0x4805, "Chelsio T440-BCH VF"},
        {0x4806, "Chelsio T440-CH VF"},
        {0x4807, "Chelsio T420-SO VF"},
        {0x4808, "Chelsio T420-CX VF"},
        {0x4809, "Chelsio T420-BT VF"},
        {0x480a, "Chelsio T404-BT VF"},
        {0x480e, "Chelsio T440-LP-CR VF"},
}, t5vf_pciids[] = {
        {0x5800, "Chelsio T580-dbg VF"},
        {0x5801,  "Chelsio T520-CR VF"},        /* 2 x 10G */
        {0x5802,  "Chelsio T522-CR VF"},        /* 2 x 10G, 2 X 1G */
        {0x5803,  "Chelsio T540-CR VF"},        /* 4 x 10G */
        {0x5807,  "Chelsio T520-SO VF"},        /* 2 x 10G, nomem */
        {0x5809,  "Chelsio T520-BT VF"},        /* 2 x 10GBaseT */
        {0x580a,  "Chelsio T504-BT VF"},        /* 4 x 1G */
        {0x580d,  "Chelsio T580-CR VF"},        /* 2 x 40G */
        {0x580e,  "Chelsio T540-LP-CR VF"},     /* 4 x 10G */
        {0x5810,  "Chelsio T580-LP-CR VF"},     /* 2 x 40G */
        {0x5811,  "Chelsio T520-LL-CR VF"},     /* 2 x 10G */
        {0x5812,  "Chelsio T560-CR VF"},        /* 1 x 40G, 2 x 10G */
        {0x5814,  "Chelsio T580-LP-SO-CR VF"},  /* 2 x 40G, nomem */
        {0x5815,  "Chelsio T502-BT VF"},        /* 2 x 1G */
        {0x5818,  "Chelsio T540-BT VF"},        /* 4 x 10GBaseT */
        {0x5819,  "Chelsio T540-LP-BT VF"},     /* 4 x 10GBaseT */
        {0x581a,  "Chelsio T540-SO-BT VF"},     /* 4 x 10GBaseT, nomem */
        {0x581b,  "Chelsio T540-SO-CR VF"},     /* 4 x 10G, nomem */
}, t6vf_pciids[] = {
        {0x6800, "Chelsio T6-DBG-25 VF"},       /* 2 x 10/25G, debug */
        {0x6801, "Chelsio T6225-CR VF"},        /* 2 x 10/25G */
        {0x6802, "Chelsio T6225-SO-CR VF"},     /* 2 x 10/25G, nomem */
        {0x6803, "Chelsio T6425-CR VF"},        /* 4 x 10/25G */
        {0x6804, "Chelsio T6425-SO-CR VF"},     /* 4 x 10/25G, nomem */
        {0x6805, "Chelsio T6225-OCP-SO VF"},    /* 2 x 10/25G, nomem */
        {0x6806, "Chelsio T62100-OCP-SO VF"},   /* 2 x 40/50/100G, nomem */
        {0x6807, "Chelsio T62100-LP-CR VF"},    /* 2 x 40/50/100G */
        {0x6808, "Chelsio T62100-SO-CR VF"},    /* 2 x 40/50/100G, nomem */
        {0x6809, "Chelsio T6210-BT VF"},        /* 2 x 10GBASE-T */
        {0x680d, "Chelsio T62100-CR VF"},       /* 2 x 40/50/100G */
        {0x6810, "Chelsio T6-DBG-100 VF"},      /* 2 x 40/50/100G, debug */
        {0x6811, "Chelsio T6225-LL-CR VF"},     /* 2 x 10/25G */
        {0x6814, "Chelsio T61100-OCP-SO VF"},   /* 1 x 40/50/100G, nomem */
        {0x6815, "Chelsio T6201-BT VF"},        /* 2 x 1000BASE-T */
 
        /* Custom */
        {0x6880, "Chelsio T6225 80 VF"},
        {0x6881, "Chelsio T62100 81 VF"},
        {0x6882, "Chelsio T6225-CR 82 VF"},
        {0x6883, "Chelsio T62100-CR 83 VF"},
        {0x6884, "Chelsio T64100-CR 84 VF"},
        {0x6885, "Chelsio T6240-SO 85 VF"},
        {0x6886, "Chelsio T6225-SO-CR 86 VF"},
        {0x6887, "Chelsio T6225-CR 87 VF"},
};
 
static d_ioctl_t t4vf_ioctl;
 
static struct cdevsw t4vf_cdevsw = {
       .d_version = D_VERSION,
       .d_ioctl = t4vf_ioctl,
       .d_name = "t4vf",
};
 
static int
t4vf_probe(device_t dev)
{
        uint16_t d;
        size_t i;
 
        d = pci_get_device(dev);
        for (i = 0; i < nitems(t4vf_pciids); i++) {
                if (d == t4vf_pciids[i].device) {
                        device_set_desc(dev, t4vf_pciids[i].desc);
                        return (BUS_PROBE_DEFAULT);
                }
        }
        return (ENXIO);
}
 
static int
t5vf_probe(device_t dev)
{
        uint16_t d;
        size_t i;
 
        d = pci_get_device(dev);
        for (i = 0; i < nitems(t5vf_pciids); i++) {
                if (d == t5vf_pciids[i].device) {
                        device_set_desc(dev, t5vf_pciids[i].desc);
                        return (BUS_PROBE_DEFAULT);
                }
        }
        return (ENXIO);
}
 
static int
t6vf_probe(device_t dev)
{
        uint16_t d;
        size_t i;
 
        d = pci_get_device(dev);
        for (i = 0; i < nitems(t6vf_pciids); i++) {
                if (d == t6vf_pciids[i].device) {
                        device_set_desc(dev, t6vf_pciids[i].desc);
                        return (BUS_PROBE_DEFAULT);
                }
        }
        return (ENXIO);
}
 
#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))
 
static int
get_params__pre_init(struct adapter *sc)
{
        int rc;
        uint32_t param[3], val[3];
 
        param[0] = FW_PARAM_DEV(FWREV);
        param[1] = FW_PARAM_DEV(TPREV);
        param[2] = FW_PARAM_DEV(CCLK);
        rc = -t4vf_query_params(sc, nitems(param), param, val);
        if (rc != 0) {
                device_printf(sc->dev,
                    "failed to query parameters (pre_init): %d.\n", rc);
                return (rc);
        }
 
        sc->params.fw_vers = val[0];
        sc->params.tp_vers = val[1];
        sc->params.vpd.cclk = val[2];
 
        snprintf(sc->fw_version, sizeof(sc->fw_version), "%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));
 
        snprintf(sc->tp_version, sizeof(sc->tp_version), "%u.%u.%u.%u",
            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));
 
        return (0);
}
 
static int
get_params__post_init(struct adapter *sc)
{
        int rc;
        uint32_t param, val;
 
        rc = -t4vf_get_sge_params(sc);
        if (rc != 0) {
                device_printf(sc->dev,
                    "unable to retrieve adapter SGE parameters: %d\n", rc);
                return (rc);
        }
 
        rc = -t4vf_get_rss_glb_config(sc);
        if (rc != 0) {
                device_printf(sc->dev,
                    "unable to retrieve adapter RSS parameters: %d\n", rc);
                return (rc);
        }
        if (sc->params.rss.mode != FW_RSS_GLB_CONFIG_CMD_MODE_BASICVIRTUAL) {
                device_printf(sc->dev,
                    "unable to operate with global RSS mode %d\n",
                    sc->params.rss.mode);
                return (EINVAL);
        }
 
        /*
         * Grab our Virtual Interface resource allocation, extract the
         * features that we're interested in and do a bit of sanity testing on
         * what we discover.
         */
        rc = -t4vf_get_vfres(sc);
        if (rc != 0) {
                device_printf(sc->dev,
                    "unable to get virtual interface resources: %d\n", rc);
                return (rc);
        }
 
        /*
         * Check for various parameter sanity issues.
         */
        if (sc->params.vfres.pmask == 0) {
                device_printf(sc->dev, "no port access configured/usable!\n");
                return (EINVAL);
        }
        if (sc->params.vfres.nvi == 0) {
                device_printf(sc->dev,
                    "no virtual interfaces configured/usable!\n");
                return (EINVAL);
        }
        sc->params.portvec = sc->params.vfres.pmask;
 
        param = FW_PARAM_PFVF(MAX_PKTS_PER_ETH_TX_PKTS_WR);
        rc = -t4vf_query_params(sc, 1, &param, &val);
        if (rc == 0)
                sc->params.max_pkts_per_eth_tx_pkts_wr = val;
        else
                sc->params.max_pkts_per_eth_tx_pkts_wr = 14;
 
        rc = t4_verify_chip_settings(sc);
        if (rc != 0)
                return (rc);
        t4_init_rx_buf_info(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)t4vf_set_params(sc, 1, &param, &val);
 
        /* Enable 32b port caps if the firmware supports it. */
        param = FW_PARAM_PFVF(PORT_CAPS32);
        val = 1;
        if (t4vf_set_params(sc, 1, &param, &val) == 0)
                sc->params.port_caps32 = 1;
 
        return (0);
}
 
#undef FW_PARAM_PFVF
#undef FW_PARAM_DEV
 
static int
cfg_itype_and_nqueues(struct adapter *sc, struct intrs_and_queues *iaq)
{
        struct vf_resources *vfres;
        int nrxq, ntxq, nports;
        int itype, iq_avail, navail, rc;
 
        /*
         * Figure out the layout of queues across our VIs and ensure
         * we can allocate enough interrupts for our layout.
         */
        vfres = &sc->params.vfres;
        nports = sc->params.nports;
        bzero(iaq, sizeof(*iaq));
 
        for (itype = INTR_MSIX; itype != 0; itype >>= 1) {
                if (itype == INTR_INTX)
                        continue;
 
                if (itype == INTR_MSIX)
                        navail = pci_msix_count(sc->dev);
                else
                        navail = pci_msi_count(sc->dev);
 
                if (navail == 0)
                        continue;
 
                iaq->intr_type = itype;
 
                /*
                 * XXX: The Linux driver reserves an Ingress Queue for
                 * forwarded interrupts when using MSI (but not MSI-X).
                 * It seems it just always asks for 2 interrupts and
                 * forwards all rxqs to the forwarded interrupt.
                 *
                 * We must reserve one IRQ for the for the firmware
                 * event queue.
                 *
                 * Every rxq requires an ingress queue with a free
                 * list and interrupts and an egress queue.  Every txq
                 * requires an ETH egress queue.
                 */
                iaq->nirq = T4VF_EXTRA_INTR;
 
                /*
                 * First, determine how many queues we can allocate.
                 * Start by finding the upper bound on rxqs from the
                 * limit on ingress queues.
                 */
                iq_avail = vfres->niqflint - iaq->nirq;
                if (iq_avail < nports) {
                        device_printf(sc->dev,
                            "Not enough ingress queues (%d) for %d ports\n",
                            vfres->niqflint, nports);
                        return (ENXIO);
                }
 
                /*
                 * Try to honor the cap on interrupts.  If there aren't
                 * enough interrupts for at least one interrupt per
                 * port, then don't bother, we will just forward all
                 * interrupts to one interrupt in that case.
                 */
                if (iaq->nirq + nports <= navail) {
                        if (iq_avail > navail - iaq->nirq)
                                iq_avail = navail - iaq->nirq;
                }
 
                nrxq = nports * t4_nrxq;
                if (nrxq > iq_avail) {
                        /*
                         * Too many ingress queues.  Use what we can.
                         */
                        nrxq = (iq_avail / nports) * nports;
                }
                KASSERT(nrxq <= iq_avail, ("too many ingress queues"));
 
                /*
                 * Next, determine the upper bound on txqs from the limit
                 * on ETH queues.
                 */
                if (vfres->nethctrl < nports) {
                        device_printf(sc->dev,
                            "Not enough ETH queues (%d) for %d ports\n",
                            vfres->nethctrl, nports);
                        return (ENXIO);
                }
 
                ntxq = nports * t4_ntxq;
                if (ntxq > vfres->nethctrl) {
                        /*
                         * Too many ETH queues.  Use what we can.
                         */
                        ntxq = (vfres->nethctrl / nports) * nports;
                }
                KASSERT(ntxq <= vfres->nethctrl, ("too many ETH queues"));
 
                /*
                 * Finally, ensure we have enough egress queues.
                 */
                if (vfres->neq < nports * 2) {
                        device_printf(sc->dev,
                            "Not enough egress queues (%d) for %d ports\n",
                            vfres->neq, nports);
                        return (ENXIO);
                }
                if (nrxq + ntxq > vfres->neq) {
                        /* Just punt and use 1 for everything. */
                        nrxq = ntxq = nports;
                }
                KASSERT(nrxq <= iq_avail, ("too many ingress queues"));
                KASSERT(ntxq <= vfres->nethctrl, ("too many ETH queues"));
                KASSERT(nrxq + ntxq <= vfres->neq, ("too many egress queues"));
 
                /*
                 * Do we have enough interrupts?  For MSI the interrupts
                 * have to be a power of 2 as well.
                 */
                iaq->nirq += nrxq;
                iaq->ntxq = ntxq;
                iaq->nrxq = nrxq;
                if (iaq->nirq <= navail &&
                    (itype != INTR_MSI || powerof2(iaq->nirq))) {
                        navail = iaq->nirq;
                        if (itype == INTR_MSIX)
                                rc = pci_alloc_msix(sc->dev, &navail);
                        else
                                rc = pci_alloc_msi(sc->dev, &navail);
                        if (rc != 0) {
                                device_printf(sc->dev,
                    "failed to allocate vectors:%d, type=%d, req=%d, rcvd=%d\n",
                                    itype, rc, iaq->nirq, navail);
                                return (rc);
                        }
                        if (navail == iaq->nirq) {
                                return (0);
                        }
                        pci_release_msi(sc->dev);
                }
 
                /* Fall back to a single interrupt. */
                iaq->nirq = 1;
                navail = iaq->nirq;
                if (itype == INTR_MSIX)
                        rc = pci_alloc_msix(sc->dev, &navail);
                else
                        rc = pci_alloc_msi(sc->dev, &navail);
                if (rc != 0)
                        device_printf(sc->dev,
                    "failed to allocate vectors:%d, type=%d, req=%d, rcvd=%d\n",
                            itype, rc, iaq->nirq, navail);
                return (rc);
        }
 
        device_printf(sc->dev,
            "failed to find a usable interrupt type.  "
            "allowed=%d, msi-x=%d, msi=%d, intx=1", t4_intr_types,
            pci_msix_count(sc->dev), pci_msi_count(sc->dev));
 
        return (ENXIO);
}
 
static int
t4vf_attach(device_t dev)
{
        struct adapter *sc;
        int rc = 0, i, j, rqidx, tqidx, n, p, pmask;
        struct make_dev_args mda;
        struct intrs_and_queues iaq;
        struct sge *s;
 
        sc = device_get_softc(dev);
        sc->dev = dev;
        sysctl_ctx_init(&sc->ctx);
        pci_enable_busmaster(dev);
        pci_set_max_read_req(dev, 4096);
        sc->params.pci.mps = pci_get_max_payload(dev);
 
        sc->flags |= IS_VF;
        TUNABLE_INT_FETCH("hw.cxgbe.dflags", &sc->debug_flags);
 
        sc->sge_gts_reg = VF_SGE_REG(A_SGE_VF_GTS);
        sc->sge_kdoorbell_reg = VF_SGE_REG(A_SGE_VF_KDOORBELL);
        snprintf(sc->lockname, sizeof(sc->lockname), "%s",
            device_get_nameunit(dev));
        mtx_init(&sc->sc_lock, sc->lockname, 0, MTX_DEF);
        t4_add_adapter(sc);
 
        mtx_init(&sc->sfl_lock, "starving freelists", 0, MTX_DEF);
        TAILQ_INIT(&sc->sfl);
        callout_init_mtx(&sc->sfl_callout, &sc->sfl_lock, 0);
 
        mtx_init(&sc->reg_lock, "indirect register access", 0, MTX_DEF);
 
        rc = t4_map_bars_0_and_4(sc);
        if (rc != 0)
                goto done; /* error message displayed already */
 
        rc = -t4vf_prep_adapter(sc);
        if (rc != 0)
                goto done;
 
        t4_init_devnames(sc);
        if (sc->names == NULL) {
                rc = ENOTSUP;
                goto done; /* error message displayed already */
        }
 
        /*
         * Leave the 'pf' and 'mbox' values as zero.  This ensures
         * that various firmware messages do not set the fields which
         * is the correct thing to do for a VF.
         */
 
        memset(sc->chan_map, 0xff, sizeof(sc->chan_map));
 
        make_dev_args_init(&mda);
        mda.mda_devsw = &t4vf_cdevsw;
        mda.mda_uid = UID_ROOT;
        mda.mda_gid = GID_WHEEL;
        mda.mda_mode = 0600;
        mda.mda_si_drv1 = sc;
        rc = make_dev_s(&mda, &sc->cdev, "%s", device_get_nameunit(dev));
        if (rc != 0)
                device_printf(dev, "failed to create nexus char device: %d.\n",
                    rc);
 
#if defined(__i386__)
        if ((cpu_feature & CPUID_CX8) == 0) {
                device_printf(dev, "64 bit atomics not available.\n");
                rc = ENOTSUP;
                goto done;
        }
#endif
 
        /*
         * Some environments do not properly handle PCIE FLRs -- e.g. in Linux
         * 2.6.31 and later we can't call pci_reset_function() in order to
         * issue an FLR because of a self- deadlock on the device semaphore.
         * Meanwhile, the OS infrastructure doesn't issue FLRs in all the
         * cases where they're needed -- for instance, some versions of KVM
         * fail to reset "Assigned Devices" when the VM reboots.  Therefore we
         * use the firmware based reset in order to reset any per function
         * state.
         */
        rc = -t4vf_fw_reset(sc);
        if (rc != 0) {
                device_printf(dev, "FW reset failed: %d\n", rc);
                goto done;
        }
        sc->flags |= FW_OK;
 
        /*
         * Grab basic operational parameters.  These will predominantly have
         * been set up by the Physical Function Driver or will be hard coded
         * into the adapter.  We just have to live with them ...  Note that
         * we _must_ get our VPD parameters before our SGE parameters because
         * we need to know the adapter's core clock from the VPD in order to
         * properly decode the SGE Timer Values.
         */
        rc = get_params__pre_init(sc);
        if (rc != 0)
                goto done; /* error message displayed already */
        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 */
 
        rc = t4_map_bar_2(sc);
        if (rc != 0)
                goto done; /* error message displayed already */
 
        rc = t4_create_dma_tag(sc);
        if (rc != 0)
                goto done; /* error message displayed already */
 
        /*
         * The number of "ports" which we support is equal to the number of
         * Virtual Interfaces with which we've been provisioned.
         */
        sc->params.nports = imin(sc->params.vfres.nvi, MAX_NPORTS);
 
        /*
         * We may have been provisioned with more VIs than the number of
         * ports we're allowed to access (our Port Access Rights Mask).
         * Just use a single VI for each port.
         */
        sc->params.nports = imin(sc->params.nports,
            bitcount32(sc->params.vfres.pmask));
 
#ifdef notyet
        /*
         * XXX: The Linux VF driver will lower nports if it thinks there
         * are too few resources in vfres (niqflint, nethctrl, neq).
         */
#endif
 
        /*
         * First pass over all the ports - allocate VIs and initialize some
         * basic parameters like mac address, port type, etc.
         */
        pmask = sc->params.vfres.pmask;
        for_each_port(sc, i) {
                struct port_info *pi;
                uint8_t mac[ETHER_ADDR_LEN];
 
                pi = malloc(sizeof(*pi), M_CXGBE, M_ZERO | M_WAITOK);
                sc->port[i] = pi;
 
                /* These must be set before t4_port_init */
                pi->adapter = sc;
                pi->port_id = i;
                pi->nvi = 1;
                pi->vi = malloc(sizeof(struct vi_info) * pi->nvi, M_CXGBE,
                    M_ZERO | M_WAITOK);
 
                /*
                 * Allocate the "main" VI and initialize parameters
                 * like mac addr.
                 */
                rc = -t4_port_init(sc, sc->mbox, sc->pf, 0, i);
                if (rc != 0) {
                        device_printf(dev, "unable to initialize port %d: %d\n",
                            i, rc);
                        free(pi->vi, M_CXGBE);
                        free(pi, M_CXGBE);
                        sc->port[i] = NULL;
                        goto done;
                }
 
                /* Prefer the MAC address set by the PF, if there is one. */
                n = 1;
                p = ffs(pmask) - 1;
                MPASS(p >= 0);
                rc = t4vf_get_vf_mac(sc, p, &n, mac);
                if (rc == 0 && n == 1)
                        t4_os_set_hw_addr(pi, mac);
                pmask &= ~(1 << p);
 
                /* No t4_link_start. */
 
                snprintf(pi->lockname, sizeof(pi->lockname), "%sp%d",
                    device_get_nameunit(dev), i);
                mtx_init(&pi->pi_lock, pi->lockname, 0, MTX_DEF);
                sc->chan_map[pi->tx_chan] = i;
 
                /* All VIs on this port share this media. */
                ifmedia_init(&pi->media, IFM_IMASK, cxgbe_media_change,
                    cxgbe_media_status);
 
                pi->dev = device_add_child(dev, sc->names->vf_ifnet_name, -1);
                if (pi->dev == NULL) {
                        device_printf(dev,
                            "failed to add device for port %d.\n", i);
                        rc = ENXIO;
                        goto done;
                }
                pi->vi[0].dev = pi->dev;
                device_set_softc(pi->dev, pi);
        }
 
        /*
         * Interrupt type, # of interrupts, # of rx/tx queues, etc.
         */
        rc = cfg_itype_and_nqueues(sc, &iaq);
        if (rc != 0)
                goto done; /* error message displayed already */
 
        sc->intr_type = iaq.intr_type;
        sc->intr_count = iaq.nirq;
 
        s = &sc->sge;
        s->nrxq = sc->params.nports * iaq.nrxq;
        s->ntxq = sc->params.nports * iaq.ntxq;
        s->neq = s->ntxq + s->nrxq;     /* the free list in an rxq is an eq */
        s->neq += sc->params.nports;    /* ctrl queues: 1 per port */
        s->niq = s->nrxq + 1;           /* 1 extra for firmware event queue */
 
        s->iqmap_sz = s->niq;
        s->eqmap_sz = s->neq;
 
        s->rxq = malloc(s->nrxq * sizeof(struct sge_rxq), M_CXGBE,
            M_ZERO | M_WAITOK);
        s->txq = malloc(s->ntxq * sizeof(struct sge_txq), M_CXGBE,
            M_ZERO | M_WAITOK);
        s->iqmap = malloc(s->iqmap_sz * sizeof(struct sge_iq *), M_CXGBE,
            M_ZERO | M_WAITOK);
        s->eqmap = malloc(s->eqmap_sz * sizeof(struct sge_eq *), M_CXGBE,
            M_ZERO | M_WAITOK);
 
        sc->irq = malloc(sc->intr_count * sizeof(struct irq), M_CXGBE,
            M_ZERO | M_WAITOK);
 
        /*
         * 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];
                struct vi_info *vi;
 
                if (pi == NULL)
                        continue;
 
                for_each_vi(pi, j, vi) {
                        vi->pi = pi;
                        vi->adapter = sc;
                        vi->qsize_rxq = t4_qsize_rxq;
                        vi->qsize_txq = t4_qsize_txq;
 
                        vi->first_rxq = rqidx;
                        vi->first_txq = tqidx;
                        vi->tmr_idx = t4_tmr_idx;
                        vi->pktc_idx = t4_pktc_idx;
                        vi->nrxq = j == 0 ? iaq.nrxq: 1;
                        vi->ntxq = j == 0 ? iaq.ntxq: 1;
 
                        rqidx += vi->nrxq;
                        tqidx += vi->ntxq;
 
                        vi->rsrv_noflowq = 0;
                }
        }
 
        rc = t4_setup_intr_handlers(sc);
        if (rc != 0) {
                device_printf(dev,
                    "failed to setup interrupt handlers: %d\n", rc);
                goto done;
        }
 
        rc = bus_generic_attach(dev);
        if (rc != 0) {
                device_printf(dev,
                    "failed to attach all child ports: %d\n", rc);
                goto done;
        }
 
        device_printf(dev,
            "%d ports, %d %s interrupt%s, %d eq, %d iq\n",
            sc->params.nports, sc->intr_count, sc->intr_type == INTR_MSIX ?
            "MSI-X" : "MSI", sc->intr_count > 1 ? "s" : "", sc->sge.neq,
            sc->sge.niq);
 
done:
        if (rc != 0)
                t4_detach_common(dev);
        else
                t4_sysctls(sc);
 
        return (rc);
}
 
static void
get_regs(struct adapter *sc, struct t4_regdump *regs, uint8_t *buf)
{
 
        /* 0x3f is used as the revision for VFs. */
        regs->version = chip_id(sc) | (0x3f << 10);
        t4_get_regs(sc, buf, regs->len);
}
 
static void
t4_clr_vi_stats(struct adapter *sc)
{
        int reg;
 
        for (reg = A_MPS_VF_STAT_TX_VF_BCAST_BYTES_L;
             reg <= A_MPS_VF_STAT_RX_VF_ERR_FRAMES_H; reg += 4)
                t4_write_reg(sc, VF_MPS_REG(reg), 0);
}
 
static int
t4vf_ioctl(struct cdev *dev, unsigned long cmd, caddr_t data, int fflag,
    struct thread *td)
{
        int rc;
        struct adapter *sc = dev->si_drv1;
 
        rc = priv_check(td, PRIV_DRIVER);
        if (rc != 0)
                return (rc);
 
        switch (cmd) {
        case CHELSIO_T4_GETREG: {
                struct t4_reg *edata = (struct t4_reg *)data;
 
                if ((edata->addr & 0x3) != 0 || edata->addr >= sc->mmio_len)
                        return (EFAULT);
 
                if (edata->size == 4)
                        edata->val = t4_read_reg(sc, edata->addr);
                else if (edata->size == 8)
                        edata->val = t4_read_reg64(sc, edata->addr);
                else
                        return (EINVAL);
 
                break;
        }
        case CHELSIO_T4_SETREG: {
                struct t4_reg *edata = (struct t4_reg *)data;
 
                if ((edata->addr & 0x3) != 0 || edata->addr >= sc->mmio_len)
                        return (EFAULT);
 
                if (edata->size == 4) {
                        if (edata->val & 0xffffffff00000000)
                                return (EINVAL);
                        t4_write_reg(sc, edata->addr, (uint32_t) edata->val);
                } else if (edata->size == 8)
                        t4_write_reg64(sc, edata->addr, edata->val);
                else
                        return (EINVAL);
                break;
        }
        case CHELSIO_T4_REGDUMP: {
                struct t4_regdump *regs = (struct t4_regdump *)data;
                int reglen = t4_get_regs_len(sc);
                uint8_t *buf;
 
                if (regs->len < reglen) {
                        regs->len = reglen; /* hint to the caller */
                        return (ENOBUFS);
                }
 
                regs->len = reglen;
                buf = malloc(reglen, M_CXGBE, M_WAITOK | M_ZERO);
                get_regs(sc, regs, buf);
                rc = copyout(buf, regs->data, reglen);
                free(buf, M_CXGBE);
                break;
        }
        case CHELSIO_T4_CLEAR_STATS: {
                int i, v;
                u_int port_id = *(uint32_t *)data;
                struct port_info *pi;
                struct vi_info *vi;
 
                if (port_id >= sc->params.nports)
                        return (EINVAL);
                pi = sc->port[port_id];
 
                /* MAC stats */
                pi->tx_parse_error = 0;
                t4_clr_vi_stats(sc);
 
                /*
                 * Since this command accepts a port, clear stats for
                 * all VIs on this port.
                 */
                for_each_vi(pi, v, vi) {
                        if (vi->flags & VI_INIT_DONE) {
                                struct sge_rxq *rxq;
                                struct sge_txq *txq;
 
                                for_each_rxq(vi, i, rxq) {
#if defined(INET) || defined(INET6)
                                        rxq->lro.lro_queued = 0;
                                        rxq->lro.lro_flushed = 0;
#endif
                                        rxq->rxcsum = 0;
                                        rxq->vlan_extraction = 0;
                                }
 
                                for_each_txq(vi, i, txq) {
                                        txq->txcsum = 0;
                                        txq->tso_wrs = 0;
                                        txq->vlan_insertion = 0;
                                        txq->imm_wrs = 0;
                                        txq->sgl_wrs = 0;
                                        txq->txpkt_wrs = 0;
                                        txq->txpkts0_wrs = 0;
                                        txq->txpkts1_wrs = 0;
                                        txq->txpkts0_pkts = 0;
                                        txq->txpkts1_pkts = 0;
                                        txq->txpkts_flush = 0;
                                        mp_ring_reset_stats(txq->r);
                                }
                        }
                }
                break;
        }
        case CHELSIO_T4_SCHED_CLASS:
                rc = t4_set_sched_class(sc, (struct t4_sched_params *)data);
                break;
        case CHELSIO_T4_SCHED_QUEUE:
                rc = t4_set_sched_queue(sc, (struct t4_sched_queue *)data);
                break;
        default:
                rc = ENOTTY;
        }
 
        return (rc);
}
 
static device_method_t t4vf_methods[] = {
        DEVMETHOD(device_probe,         t4vf_probe),
        DEVMETHOD(device_attach,        t4vf_attach),
        DEVMETHOD(device_detach,        t4_detach_common),
 
        DEVMETHOD_END
};
 
static driver_t t4vf_driver = {
        "t4vf",
        t4vf_methods,
        sizeof(struct adapter)
};
 
static device_method_t t5vf_methods[] = {
        DEVMETHOD(device_probe,         t5vf_probe),
        DEVMETHOD(device_attach,        t4vf_attach),
        DEVMETHOD(device_detach,        t4_detach_common),
 
        DEVMETHOD_END
};
 
static driver_t t5vf_driver = {
        "t5vf",
        t5vf_methods,
        sizeof(struct adapter)
};
 
static device_method_t t6vf_methods[] = {
        DEVMETHOD(device_probe,         t6vf_probe),
        DEVMETHOD(device_attach,        t4vf_attach),
        DEVMETHOD(device_detach,        t4_detach_common),
 
        DEVMETHOD_END
};
 
static driver_t t6vf_driver = {
        "t6vf",
        t6vf_methods,
        sizeof(struct adapter)
};
 
static driver_t cxgbev_driver = {
        "cxgbev",
        cxgbe_methods,
        sizeof(struct port_info)
};
 
static driver_t cxlv_driver = {
        "cxlv",
        cxgbe_methods,
        sizeof(struct port_info)
};
 
static driver_t ccv_driver = {
        "ccv",
        cxgbe_methods,
        sizeof(struct port_info)
};
 
static devclass_t t4vf_devclass, t5vf_devclass, t6vf_devclass;
static devclass_t cxgbev_devclass, cxlv_devclass, ccv_devclass;
 
DRIVER_MODULE(t4vf, pci, t4vf_driver, t4vf_devclass, 0, 0);
MODULE_VERSION(t4vf, 1);
MODULE_DEPEND(t4vf, t4nex, 1, 1, 1);
 
DRIVER_MODULE(t5vf, pci, t5vf_driver, t5vf_devclass, 0, 0);
MODULE_VERSION(t5vf, 1);
MODULE_DEPEND(t5vf, t5nex, 1, 1, 1);
 
DRIVER_MODULE(t6vf, pci, t6vf_driver, t6vf_devclass, 0, 0);
MODULE_VERSION(t6vf, 1);
MODULE_DEPEND(t6vf, t6nex, 1, 1, 1);
 
DRIVER_MODULE(cxgbev, t4vf, cxgbev_driver, cxgbev_devclass, 0, 0);
MODULE_VERSION(cxgbev, 1);
 
DRIVER_MODULE(cxlv, t5vf, cxlv_driver, cxlv_devclass, 0, 0);
MODULE_VERSION(cxlv, 1);
 
DRIVER_MODULE(ccv, t6vf, ccv_driver, ccv_devclass, 0, 0);
MODULE_VERSION(ccv, 1);