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/*

 * ioh3420.c

 * Intel X58 north bridge IOH

 * PCI Express root port device id 3420

 *

 * Copyright (c) 2010 Isaku Yamahata <yamahata at valinux co jp>

 *                    VA Linux Systems Japan K.K.

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License as published by

 * the Free Software Foundation; either version 2 of the License, or

 * (at your option) any later version.

 *

 * 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

 * GNU General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License along

 * with this program; if not, see <http://www.gnu.org/licenses/>.

 */

#include "pci_ids.h"

#include "msi.h"

#include "pcie.h"

#include "ioh3420.h"

#define PCI_DEVICE_ID_IOH_EPORT         0x3420  /* D0:F0 express mode */

#define PCI_DEVICE_ID_IOH_REV           0x2

#define IOH_EP_SSVID_OFFSET             0x40

#define IOH_EP_SSVID_SVID               PCI_VENDOR_ID_INTEL

#define IOH_EP_SSVID_SSID               0

#define IOH_EP_MSI_OFFSET               0x60

#define IOH_EP_MSI_SUPPORTED_FLAGS      PCI_MSI_FLAGS_MASKBIT

#define IOH_EP_MSI_NR_VECTOR            2

#define IOH_EP_EXP_OFFSET               0x90

#define IOH_EP_AER_OFFSET               0x100

/*

 * If two MSI vector are allocated, Advanced Error Interrupt Message Number

 * is 1. otherwise 0.

 * 17.12.5.10 RPERRSTS,  32:27 bit Advanced Error Interrupt Message Number.

 */

static uint8_t ioh3420_aer_vector(const PCIDevice *d)

{

    switch (msi_nr_vectors_allocated(d)) {

    case 1:

        return 0;

    case 2:

        return 1;

    case 4:

    case 8:

    case 16:

    case 32:

    default:

        break;

    }

    abort();

    return 0;

}

static void ioh3420_aer_vector_update(PCIDevice *d)

{

    pcie_aer_root_set_vector(d, ioh3420_aer_vector(d));

}

static void ioh3420_write_config(PCIDevice *d,

                                   uint32_t address, uint32_t val, int len)

{

    uint32_t root_cmd =

        pci_get_long(d->config + d->exp.aer_cap + PCI_ERR_ROOT_COMMAND);

    pci_bridge_write_config(d, address, val, len);

    ioh3420_aer_vector_update(d);

    pcie_cap_slot_write_config(d, address, val, len);

    pcie_aer_write_config(d, address, val, len);

    pcie_aer_root_write_config(d, address, val, len, root_cmd);

}

static void ioh3420_reset(DeviceState *qdev)

{

    PCIDevice *d = PCI_DEVICE(qdev);

    ioh3420_aer_vector_update(d);

    pcie_cap_root_reset(d);

    pcie_cap_deverr_reset(d);

    pcie_cap_slot_reset(d);

    pcie_aer_root_reset(d);

    pci_bridge_reset(qdev);

    pci_bridge_disable_base_limit(d);

}

static int ioh3420_initfn(PCIDevice *d)

{

    PCIBridge* br = DO_UPCAST(PCIBridge, dev, d);

    PCIEPort *p = DO_UPCAST(PCIEPort, br, br);

    PCIESlot *s = DO_UPCAST(PCIESlot, port, p);

    int rc;

    rc = pci_bridge_initfn(d);

    if (rc < 0) {

        return rc;

    }

    pcie_port_init_reg(d);

    rc = pci_bridge_ssvid_init(d, IOH_EP_SSVID_OFFSET,

                               IOH_EP_SSVID_SVID, IOH_EP_SSVID_SSID);

    if (rc < 0) {

        goto err_bridge;

    }

    rc = msi_init(d, IOH_EP_MSI_OFFSET, IOH_EP_MSI_NR_VECTOR,

                  IOH_EP_MSI_SUPPORTED_FLAGS & PCI_MSI_FLAGS_64BIT,

                  IOH_EP_MSI_SUPPORTED_FLAGS & PCI_MSI_FLAGS_MASKBIT);

    if (rc < 0) {

        goto err_bridge;

    }

    rc = pcie_cap_init(d, IOH_EP_EXP_OFFSET, PCI_EXP_TYPE_ROOT_PORT, p->port);

    if (rc < 0) {

        goto err_msi;

    }

    pcie_cap_deverr_init(d);

    pcie_cap_slot_init(d, s->slot);

    pcie_chassis_create(s->chassis);

    rc = pcie_chassis_add_slot(s);

    if (rc < 0) {

        goto err_pcie_cap;

    }

    pcie_cap_root_init(d);

    rc = pcie_aer_init(d, IOH_EP_AER_OFFSET);

    if (rc < 0) {

        goto err;

    }

    pcie_aer_root_init(d);

    ioh3420_aer_vector_update(d);

    return 0;

err:

    pcie_chassis_del_slot(s);

err_pcie_cap:

    pcie_cap_exit(d);

err_msi:

    msi_uninit(d);

err_bridge:

    pci_bridge_exitfn(d);

    return rc;

}

static void ioh3420_exitfn(PCIDevice *d)

{

    PCIBridge* br = DO_UPCAST(PCIBridge, dev, d);

    PCIEPort *p = DO_UPCAST(PCIEPort, br, br);

    PCIESlot *s = DO_UPCAST(PCIESlot, port, p);

    pcie_aer_exit(d);

    pcie_chassis_del_slot(s);

    pcie_cap_exit(d);

    msi_uninit(d);

    pci_bridge_exitfn(d);

}

PCIESlot *ioh3420_init(PCIBus *bus, int devfn, bool multifunction,

                         const char *bus_name, pci_map_irq_fn map_irq,

                         uint8_t port, uint8_t chassis, uint16_t slot)

{

    PCIDevice *d;

    PCIBridge *br;

    DeviceState *qdev;

    d = pci_create_multifunction(bus, devfn, multifunction, "ioh3420");

    if (!d) {

        return NULL;

    }

    br = DO_UPCAST(PCIBridge, dev, d);

    qdev = &br->dev.qdev;

    pci_bridge_map_irq(br, bus_name, map_irq);

    qdev_prop_set_uint8(qdev, "port", port);

    qdev_prop_set_uint8(qdev, "chassis", chassis);

    qdev_prop_set_uint16(qdev, "slot", slot);

    qdev_init_nofail(qdev);

    return DO_UPCAST(PCIESlot, port, DO_UPCAST(PCIEPort, br, br));

}

static const VMStateDescription vmstate_ioh3420 = {

    .name = "ioh-3240-express-root-port",

    .version_id = 1,

    .minimum_version_id = 1,

    .minimum_version_id_old = 1,

    .post_load = pcie_cap_slot_post_load,

    .fields = (VMStateField[]) {

        VMSTATE_PCIE_DEVICE(port.br.dev, PCIESlot),

        VMSTATE_STRUCT(port.br.dev.exp.aer_log, PCIESlot, 0,

                       vmstate_pcie_aer_log, PCIEAERLog),

        VMSTATE_END_OF_LIST()

    }

};

static Property ioh3420_properties[] = {

    DEFINE_PROP_UINT8("port", PCIESlot, port.port, 0),

    DEFINE_PROP_UINT8("chassis", PCIESlot, chassis, 0),

    DEFINE_PROP_UINT16("slot", PCIESlot, slot, 0),

    DEFINE_PROP_UINT16("aer_log_max", PCIESlot,

    port.br.dev.exp.aer_log.log_max,

    PCIE_AER_LOG_MAX_DEFAULT),

    DEFINE_PROP_END_OF_LIST(),

};

static void ioh3420_class_init(ObjectClass *klass, void *data)

{

    DeviceClass *dc = DEVICE_CLASS(klass);

    PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);

    k->is_express = 1;

    k->is_bridge = 1;

    k->config_write = ioh3420_write_config;

    k->init = ioh3420_initfn;

    k->exit = ioh3420_exitfn;

    k->vendor_id = PCI_VENDOR_ID_INTEL;

    k->device_id = PCI_DEVICE_ID_IOH_EPORT;

    k->revision = PCI_DEVICE_ID_IOH_REV;

    dc->desc = "Intel IOH device id 3420 PCIE Root Port";

    dc->reset = ioh3420_reset;

    dc->vmsd = &vmstate_ioh3420;

    dc->props = ioh3420_properties;

}

static TypeInfo ioh3420_info = {

    .name          = "ioh3420",

    .parent        = TYPE_PCI_DEVICE,

    .instance_size = sizeof(PCIESlot),

    .class_init    = ioh3420_class_init,

};

static void ioh3420_register_types(void)

{

    type_register_static(&ioh3420_info);

}

type_init(ioh3420_register_types)

/*

 * Local variables:

 *  c-indent-level: 4

 *  c-basic-offset: 4

 *  tab-width: 8

 *  indent-tab-mode: nil

 * End:

 */