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 "hw/pci/pci_ids.h"
  23 #include "hw/pci/msi.h"
  24 #include "hw/pci/pcie.h"
  25 #include "xio3130_upstream.h"
  26
  27 #define PCI_DEVICE_ID_TI_XIO3130U       0x8232  /* upstream port */
  28 #define XIO3130_REVISION                0x2
  29 #define XIO3130_MSI_OFFSET              0x70
  30 #define XIO3130_MSI_SUPPORTED_FLAGS     PCI_MSI_FLAGS_64BIT
  31 #define XIO3130_MSI_NR_VECTOR           1
  32 #define XIO3130_SSVID_OFFSET            0x80
  33 #define XIO3130_SSVID_SVID              0
  34 #define XIO3130_SSVID_SSID              0
  35 #define XIO3130_EXP_OFFSET              0x90
  36 #define XIO3130_AER_OFFSET              0x100
  37
  38 static void xio3130_upstream_write_config(PCIDevice *d, uint32_t address,
  39                                           uint32_t val, int len)
  40 {
  41     pci_bridge_write_config(d, address, val, len);
  42     pcie_cap_flr_write_config(d, address, val, len);
  43     pcie_aer_write_config(d, address, val, len);
  44 }
  45
  46 static void xio3130_upstream_reset(DeviceState *qdev)
  47 {
  48     PCIDevice *d = PCI_DEVICE(qdev);
  49
  50     pci_bridge_reset(qdev);
  51     pcie_cap_deverr_reset(d);
  52 }
  53
  54 static int xio3130_upstream_initfn(PCIDevice *d)
  55 {
  56     PCIEPort *p = PCIE_PORT(d);
  57     int rc;
  58
  59     rc = pci_bridge_initfn(d, TYPE_PCIE_BUS);
  60     if (rc < 0) {
  61         return rc;
  62     }
  63
  64     pcie_port_init_reg(d);
  65
  66     rc = msi_init(d, XIO3130_MSI_OFFSET, XIO3130_MSI_NR_VECTOR,
  67                   XIO3130_MSI_SUPPORTED_FLAGS & PCI_MSI_FLAGS_64BIT,
  68                   XIO3130_MSI_SUPPORTED_FLAGS & PCI_MSI_FLAGS_MASKBIT);
  69     if (rc < 0) {
  70         goto err_bridge;
  71     }
  72     rc = pci_bridge_ssvid_init(d, XIO3130_SSVID_OFFSET,
  73                                XIO3130_SSVID_SVID, XIO3130_SSVID_SSID);
  74     if (rc < 0) {
  75         goto err_bridge;
  76     }
  77     rc = pcie_cap_init(d, XIO3130_EXP_OFFSET, PCI_EXP_TYPE_UPSTREAM,
  78                        p->port);
  79     if (rc < 0) {
  80         goto err_msi;
  81     }
  82     pcie_cap_flr_init(d);
  83     pcie_cap_deverr_init(d);
  84     rc = pcie_aer_init(d, XIO3130_AER_OFFSET);
  85     if (rc < 0) {
  86         goto err;
  87     }
  88
  89     return 0;
  90
  91 err:
  92     pcie_cap_exit(d);
  93 err_msi:
  94     msi_uninit(d);
  95 err_bridge:
  96     pci_bridge_exitfn(d);
  97     return rc;
  98 }
  99
 100 static void xio3130_upstream_exitfn(PCIDevice *d)
 101 {
 102     pcie_aer_exit(d);
 103     pcie_cap_exit(d);
 104     msi_uninit(d);
 105     pci_bridge_exitfn(d);
 106 }
 107
 108 PCIEPort *xio3130_upstream_init(PCIBus *bus, int devfn, bool multifunction,
 109                              const char *bus_name, pci_map_irq_fn map_irq,
 110                              uint8_t port)
 111 {
 112     PCIDevice *d;
 113     PCIBridge *br;
 114     DeviceState *qdev;
 115
 116     d = pci_create_multifunction(bus, devfn, multifunction, "x3130-upstream");
 117     if (!d) {
 118         return NULL;
 119     }
 120     br = PCI_BRIDGE(d);
 121
 122     qdev = DEVICE(d);
 123     pci_bridge_map_irq(br, bus_name, map_irq);
 124     qdev_prop_set_uint8(qdev, "port", port);
 125     qdev_init_nofail(qdev);
 126
 127     return PCIE_PORT(d);
 128 }
 129
 130 static const VMStateDescription vmstate_xio3130_upstream = {
 131     .name = "xio3130-express-upstream-port",
 132     .version_id = 1,
 133     .minimum_version_id = 1,
 134     .minimum_version_id_old = 1,
 135     .fields = (VMStateField[]) {
 136         VMSTATE_PCIE_DEVICE(parent_obj.parent_obj, PCIEPort),
 137         VMSTATE_STRUCT(parent_obj.parent_obj.exp.aer_log, PCIEPort, 0,
 138                        vmstate_pcie_aer_log, PCIEAERLog),
 139         VMSTATE_END_OF_LIST()
 140     }
 141 };
 142
 143 static void xio3130_upstream_class_init(ObjectClass *klass, void *data)
 144 {
 145     DeviceClass *dc = DEVICE_CLASS(klass);
 146     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
 147
 148     k->is_express = 1;
 149     k->is_bridge = 1;
 150     k->config_write = xio3130_upstream_write_config;
 151     k->init = xio3130_upstream_initfn;
 152     k->exit = xio3130_upstream_exitfn;
 153     k->vendor_id = PCI_VENDOR_ID_TI;
 154     k->device_id = PCI_DEVICE_ID_TI_XIO3130U;
 155     k->revision = XIO3130_REVISION;
 156     set_bit(DEVICE_CATEGORY_BRIDGE, dc->categories);
 157     dc->desc = "TI X3130 Upstream Port of PCI Express Switch";
 158     dc->reset = xio3130_upstream_reset;
 159     dc->vmsd = &vmstate_xio3130_upstream;
 160 }
 161
 162 static const TypeInfo xio3130_upstream_info = {
 163     .name          = "x3130-upstream",
 164     .parent        = TYPE_PCIE_PORT,
 165     .class_init    = xio3130_upstream_class_init,
 166 };
 167
 168 static void xio3130_upstream_register_types(void)
 169 {
 170     type_register_static(&xio3130_upstream_info);
 171 }
 172
 173 type_init(xio3130_upstream_register_types)
 174
 175
 176 /*
 177  * Local variables:
 178  *  c-indent-level: 4
 179  *  c-basic-offset: 4
 180  *  tab-width: 8
 181  *  indent-tab-mode: nil
 182  * End:
 183  */