hw/pci-bridge/xio3130_upstream.c

   1 /*
   2  * xio3130_upstream.c
   3  * TI X3130 pci express upstream 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_upstream.h"
  27
  28 #define PCI_DEVICE_ID_TI_XIO3130U       0x8232  /* upstream port */
  29 #define XIO3130_REVISION                0x2
  30 #define XIO3130_MSI_OFFSET              0x70
  31 #define XIO3130_MSI_SUPPORTED_FLAGS     PCI_MSI_FLAGS_64BIT
  32 #define XIO3130_MSI_NR_VECTOR           1
  33 #define XIO3130_SSVID_OFFSET            0x80
  34 #define XIO3130_SSVID_SVID              0
  35 #define XIO3130_SSVID_SSID              0
  36 #define XIO3130_EXP_OFFSET              0x90
  37 #define XIO3130_AER_OFFSET              0x100
  38
  39 static void xio3130_upstream_write_config(PCIDevice *d, uint32_t address,
  40                                           uint32_t val, int len)
  41 {
  42     pci_bridge_write_config(d, address, val, len);
  43     pcie_cap_flr_write_config(d, address, val, len);
  44     pcie_aer_write_config(d, address, val, len);
  45 }
  46
  47 static void xio3130_upstream_reset(DeviceState *qdev)
  48 {
  49     PCIDevice *d = PCI_DEVICE(qdev);
  50
  51     pci_bridge_reset(qdev);
  52     pcie_cap_deverr_reset(d);
  53 }
  54
  55 static void xio3130_upstream_realize(PCIDevice *d, Error **errp)
  56 {
  57     PCIEPort *p = PCIE_PORT(d);
  58     int rc;
  59
  60     pci_bridge_initfn(d, TYPE_PCIE_BUS);
  61     pcie_port_init_reg(d);
  62
  63     rc = msi_init(d, XIO3130_MSI_OFFSET, XIO3130_MSI_NR_VECTOR,
  64                   XIO3130_MSI_SUPPORTED_FLAGS & PCI_MSI_FLAGS_64BIT,
  65                   XIO3130_MSI_SUPPORTED_FLAGS & PCI_MSI_FLAGS_MASKBIT,
  66                   errp);
  67     if (rc < 0) {
  68         assert(rc == -ENOTSUP);
  69         goto err_bridge;
  70     }
  71
  72     rc = pci_bridge_ssvid_init(d, XIO3130_SSVID_OFFSET,
  73                                XIO3130_SSVID_SVID, XIO3130_SSVID_SSID,
  74                                errp);
  75     if (rc < 0) {
  76         goto err_bridge;
  77     }
  78
  79     rc = pcie_cap_init(d, XIO3130_EXP_OFFSET, PCI_EXP_TYPE_UPSTREAM,
  80                        p->port, errp);
  81     if (rc < 0) {
  82         goto err_msi;
  83     }
  84     pcie_cap_flr_init(d);
  85     pcie_cap_deverr_init(d);
  86
  87     rc = pcie_aer_init(d, PCI_ERR_VER, XIO3130_AER_OFFSET,
  88                        PCI_ERR_SIZEOF, errp);
  89     if (rc < 0) {
  90         goto err;
  91     }
  92
  93     return;
  94
  95 err:
  96     pcie_cap_exit(d);
  97 err_msi:
  98     msi_uninit(d);
  99 err_bridge:
 100     pci_bridge_exitfn(d);
 101 }
 102
 103 static void xio3130_upstream_exitfn(PCIDevice *d)
 104 {
 105     pcie_aer_exit(d);
 106     pcie_cap_exit(d);
 107     msi_uninit(d);
 108     pci_bridge_exitfn(d);
 109 }
 110
 111 PCIEPort *xio3130_upstream_init(PCIBus *bus, int devfn, bool multifunction,
 112                              const char *bus_name, pci_map_irq_fn map_irq,
 113                              uint8_t port)
 114 {
 115     PCIDevice *d;
 116     PCIBridge *br;
 117     DeviceState *qdev;
 118
 119     d = pci_create_multifunction(bus, devfn, multifunction, "x3130-upstream");
 120     if (!d) {
 121         return NULL;
 122     }
 123     br = PCI_BRIDGE(d);
 124
 125     qdev = DEVICE(d);
 126     pci_bridge_map_irq(br, bus_name, map_irq);
 127     qdev_prop_set_uint8(qdev, "port", port);
 128     qdev_init_nofail(qdev);
 129
 130     return PCIE_PORT(d);
 131 }
 132
 133 static const VMStateDescription vmstate_xio3130_upstream = {
 134     .name = "xio3130-express-upstream-port",
 135     .priority = MIG_PRI_PCI_BUS,
 136     .version_id = 1,
 137     .minimum_version_id = 1,
 138     .fields = (VMStateField[]) {
 139         VMSTATE_PCI_DEVICE(parent_obj.parent_obj, PCIEPort),
 140         VMSTATE_STRUCT(parent_obj.parent_obj.exp.aer_log, PCIEPort, 0,
 141                        vmstate_pcie_aer_log, PCIEAERLog),
 142         VMSTATE_END_OF_LIST()
 143     }
 144 };
 145
 146 static void xio3130_upstream_class_init(ObjectClass *klass, void *data)
 147 {
 148     DeviceClass *dc = DEVICE_CLASS(klass);
 149     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
 150
 151     k->is_bridge = 1;
 152     k->config_write = xio3130_upstream_write_config;
 153     k->realize = xio3130_upstream_realize;
 154     k->exit = xio3130_upstream_exitfn;
 155     k->vendor_id = PCI_VENDOR_ID_TI;
 156     k->device_id = PCI_DEVICE_ID_TI_XIO3130U;
 157     k->revision = XIO3130_REVISION;
 158     set_bit(DEVICE_CATEGORY_BRIDGE, dc->categories);
 159     dc->desc = "TI X3130 Upstream Port of PCI Express Switch";
 160     dc->reset = xio3130_upstream_reset;
 161     dc->vmsd = &vmstate_xio3130_upstream;
 162 }
 163
 164 static const TypeInfo xio3130_upstream_info = {
 165     .name          = "x3130-upstream",
 166     .parent        = TYPE_PCIE_PORT,
 167     .class_init    = xio3130_upstream_class_init,
 168     .interfaces = (InterfaceInfo[]) {
 169         { INTERFACE_PCIE_DEVICE },
 170         { }
 171     },
 172 };
 173
 174 static void xio3130_upstream_register_types(void)
 175 {
 176     type_register_static(&xio3130_upstream_info);
 177 }
 178
 179 type_init(xio3130_upstream_register_types)