hw/pci-bridge/xio3130_downstream.c

   1 /*
   2  * x3130_downstream.c
   3  * TI X3130 pci express downstream port switch
   4  *
   5  * Copyright (c) 2010 Isaku Yamahata <yamahata at valinux co jp>
   6  *                    VA Linux Systems Japan K.K.
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or
  11  * (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License along
  19  * with this program; if not, see <http://www.gnu.org/licenses/>.
  20  */
  21
  22 #include "qemu/osdep.h"
  23 #include "hw/pci/pci_ids.h"
  24 #include "hw/pci/msi.h"
  25 #include "hw/pci/pcie.h"
  26 #include "xio3130_downstream.h"
  27 #include "qapi/error.h"
  28
  29 #define PCI_DEVICE_ID_TI_XIO3130D       0x8233  /* downstream port */
  30 #define XIO3130_REVISION                0x1
  31 #define XIO3130_MSI_OFFSET              0x70
  32 #define XIO3130_MSI_SUPPORTED_FLAGS     PCI_MSI_FLAGS_64BIT
  33 #define XIO3130_MSI_NR_VECTOR           1
  34 #define XIO3130_SSVID_OFFSET            0x80
  35 #define XIO3130_SSVID_SVID              0
  36 #define XIO3130_SSVID_SSID              0
  37 #define XIO3130_EXP_OFFSET              0x90
  38 #define XIO3130_AER_OFFSET              0x100
  39
  40 static void xio3130_downstream_write_config(PCIDevice *d, uint32_t address,
  41                                          uint32_t val, int len)
  42 {
  43     pci_bridge_write_config(d, address, val, len);
  44     pcie_cap_flr_write_config(d, address, val, len);
  45     pcie_cap_slot_write_config(d, address, val, len);
  46     pcie_aer_write_config(d, address, val, len);
  47 }
  48
  49 static void xio3130_downstream_reset(DeviceState *qdev)
  50 {
  51     PCIDevice *d = PCI_DEVICE(qdev);
  52
  53     pcie_cap_deverr_reset(d);
  54     pcie_cap_slot_reset(d);
  55     pcie_cap_arifwd_reset(d);
  56     pci_bridge_reset(qdev);
  57 }
  58
  59 static void xio3130_downstream_realize(PCIDevice *d, Error **errp)
  60 {
  61     PCIEPort *p = PCIE_PORT(d);
  62     PCIESlot *s = PCIE_SLOT(d);
  63     int rc;
  64
  65     pci_bridge_initfn(d, TYPE_PCIE_BUS);
  66     pcie_port_init_reg(d);
  67
  68     rc = msi_init(d, XIO3130_MSI_OFFSET, XIO3130_MSI_NR_VECTOR,
  69                   XIO3130_MSI_SUPPORTED_FLAGS & PCI_MSI_FLAGS_64BIT,
  70                   XIO3130_MSI_SUPPORTED_FLAGS & PCI_MSI_FLAGS_MASKBIT,
  71                   errp);
  72     if (rc < 0) {
  73         assert(rc == -ENOTSUP);
  74         goto err_bridge;
  75     }
  76
  77     rc = pci_bridge_ssvid_init(d, XIO3130_SSVID_OFFSET,
  78                                XIO3130_SSVID_SVID, XIO3130_SSVID_SSID,
  79                                errp);
  80     if (rc < 0) {
  81         goto err_bridge;
  82     }
  83
  84     rc = pcie_cap_init(d, XIO3130_EXP_OFFSET, PCI_EXP_TYPE_DOWNSTREAM,
  85                        p->port, errp);
  86     if (rc < 0) {
  87         goto err_msi;
  88     }
  89     pcie_cap_flr_init(d);
  90     pcie_cap_deverr_init(d);
  91     pcie_cap_slot_init(d, s->slot);
  92     pcie_cap_arifwd_init(d);
  93
  94     pcie_chassis_create(s->chassis);
  95     rc = pcie_chassis_add_slot(s);
  96     if (rc < 0) {
  97         goto err_pcie_cap;
  98     }
  99
 100     rc = pcie_aer_init(d, PCI_ERR_VER, XIO3130_AER_OFFSET,
 101                        PCI_ERR_SIZEOF, errp);
 102     if (rc < 0) {
 103         goto err;
 104     }
 105
 106     return;
 107
 108 err:
 109     pcie_chassis_del_slot(s);
 110 err_pcie_cap:
 111     pcie_cap_exit(d);
 112 err_msi:
 113     msi_uninit(d);
 114 err_bridge:
 115     pci_bridge_exitfn(d);
 116 }
 117
 118 static void xio3130_downstream_exitfn(PCIDevice *d)
 119 {
 120     PCIESlot *s = PCIE_SLOT(d);
 121
 122     pcie_aer_exit(d);
 123     pcie_chassis_del_slot(s);
 124     pcie_cap_exit(d);
 125     msi_uninit(d);
 126     pci_bridge_exitfn(d);
 127 }
 128
 129 PCIESlot *xio3130_downstream_init(PCIBus *bus, int devfn, bool multifunction,
 130                                   const char *bus_name, pci_map_irq_fn map_irq,
 131                                   uint8_t port, uint8_t chassis,
 132                                   uint16_t slot)
 133 {
 134     PCIDevice *d;
 135     PCIBridge *br;
 136     DeviceState *qdev;
 137
 138     d = pci_create_multifunction(bus, devfn, multifunction,
 139                                  "xio3130-downstream");
 140     if (!d) {
 141         return NULL;
 142     }
 143     br = PCI_BRIDGE(d);
 144
 145     qdev = DEVICE(d);
 146     pci_bridge_map_irq(br, bus_name, map_irq);
 147     qdev_prop_set_uint8(qdev, "port", port);
 148     qdev_prop_set_uint8(qdev, "chassis", chassis);
 149     qdev_prop_set_uint16(qdev, "slot", slot);
 150     qdev_init_nofail(qdev);
 151
 152     return PCIE_SLOT(d);
 153 }
 154
 155 static Property xio3130_downstream_props[] = {
 156     DEFINE_PROP_BIT(COMPAT_PROP_PCP, PCIDevice, cap_present,
 157                     QEMU_PCIE_SLTCAP_PCP_BITNR, true),
 158     DEFINE_PROP_END_OF_LIST()
 159 };
 160
 161 static const VMStateDescription vmstate_xio3130_downstream = {
 162     .name = "xio3130-express-downstream-port",
 163     .version_id = 1,
 164     .minimum_version_id = 1,
 165     .post_load = pcie_cap_slot_post_load,
 166     .fields = (VMStateField[]) {
 167         VMSTATE_PCI_DEVICE(parent_obj.parent_obj.parent_obj, PCIESlot),
 168         VMSTATE_STRUCT(parent_obj.parent_obj.parent_obj.exp.aer_log,
 169                        PCIESlot, 0, vmstate_pcie_aer_log, PCIEAERLog),
 170         VMSTATE_END_OF_LIST()
 171     }
 172 };
 173
 174 static void xio3130_downstream_class_init(ObjectClass *klass, void *data)
 175 {
 176     DeviceClass *dc = DEVICE_CLASS(klass);
 177     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
 178
 179     k->is_express = 1;
 180     k->is_bridge = 1;
 181     k->config_write = xio3130_downstream_write_config;
 182     k->realize = xio3130_downstream_realize;
 183     k->exit = xio3130_downstream_exitfn;
 184     k->vendor_id = PCI_VENDOR_ID_TI;
 185     k->device_id = PCI_DEVICE_ID_TI_XIO3130D;
 186     k->revision = XIO3130_REVISION;
 187     set_bit(DEVICE_CATEGORY_BRIDGE, dc->categories);
 188     dc->desc = "TI X3130 Downstream Port of PCI Express Switch";
 189     dc->reset = xio3130_downstream_reset;
 190     dc->vmsd = &vmstate_xio3130_downstream;
 191     dc->props = xio3130_downstream_props;
 192 }
 193
 194 static const TypeInfo xio3130_downstream_info = {
 195     .name          = "xio3130-downstream",
 196     .parent        = TYPE_PCIE_SLOT,
 197     .class_init    = xio3130_downstream_class_init,
 198 };
 199
 200 static void xio3130_downstream_register_types(void)
 201 {
 202     type_register_static(&xio3130_downstream_info);
 203 }
 204
 205 type_init(xio3130_downstream_register_types)