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
  28 #define PCI_DEVICE_ID_TI_XIO3130D       0x8233  /* downstream port */
  29 #define XIO3130_REVISION                0x1
  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_downstream_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_cap_slot_write_config(d, address, val, len);
  45     pcie_aer_write_config(d, address, val, len);
  46 }
  47
  48 static void xio3130_downstream_reset(DeviceState *qdev)
  49 {
  50     PCIDevice *d = PCI_DEVICE(qdev);
  51
  52     pcie_cap_deverr_reset(d);
  53     pcie_cap_slot_reset(d);
  54     pcie_cap_arifwd_reset(d);
  55     pci_bridge_reset(qdev);
  56 }
  57
  58 static int xio3130_downstream_initfn(PCIDevice *d)
  59 {
  60     PCIEPort *p = PCIE_PORT(d);
  61     PCIESlot *s = PCIE_SLOT(d);
  62     int rc;
  63
  64     pci_bridge_initfn(d, TYPE_PCIE_BUS);
  65     pcie_port_init_reg(d);
  66
  67     rc = msi_init(d, XIO3130_MSI_OFFSET, XIO3130_MSI_NR_VECTOR,
  68                   XIO3130_MSI_SUPPORTED_FLAGS & PCI_MSI_FLAGS_64BIT,
  69                   XIO3130_MSI_SUPPORTED_FLAGS & PCI_MSI_FLAGS_MASKBIT);
  70     if (rc < 0) {
  71         goto err_bridge;
  72     }
  73     rc = pci_bridge_ssvid_init(d, XIO3130_SSVID_OFFSET,
  74                                XIO3130_SSVID_SVID, XIO3130_SSVID_SSID);
  75     if (rc < 0) {
  76         goto err_bridge;
  77     }
  78     rc = pcie_cap_init(d, XIO3130_EXP_OFFSET, PCI_EXP_TYPE_DOWNSTREAM,
  79                        p->port);
  80     if (rc < 0) {
  81         goto err_msi;
  82     }
  83     pcie_cap_flr_init(d);
  84     pcie_cap_deverr_init(d);
  85     pcie_cap_slot_init(d, s->slot);
  86     pcie_chassis_create(s->chassis);
  87     rc = pcie_chassis_add_slot(s);
  88     if (rc < 0) {
  89         goto err_pcie_cap;
  90     }
  91     pcie_cap_arifwd_init(d);
  92     rc = pcie_aer_init(d, XIO3130_AER_OFFSET);
  93     if (rc < 0) {
  94         goto err;
  95     }
  96
  97     return 0;
  98
  99 err:
 100     pcie_chassis_del_slot(s);
 101 err_pcie_cap:
 102     pcie_cap_exit(d);
 103 err_msi:
 104     msi_uninit(d);
 105 err_bridge:
 106     pci_bridge_exitfn(d);
 107     return rc;
 108 }
 109
 110 static void xio3130_downstream_exitfn(PCIDevice *d)
 111 {
 112     PCIESlot *s = PCIE_SLOT(d);
 113
 114     pcie_aer_exit(d);
 115     pcie_chassis_del_slot(s);
 116     pcie_cap_exit(d);
 117     msi_uninit(d);
 118     pci_bridge_exitfn(d);
 119 }
 120
 121 PCIESlot *xio3130_downstream_init(PCIBus *bus, int devfn, bool multifunction,
 122                                   const char *bus_name, pci_map_irq_fn map_irq,
 123                                   uint8_t port, uint8_t chassis,
 124                                   uint16_t slot)
 125 {
 126     PCIDevice *d;
 127     PCIBridge *br;
 128     DeviceState *qdev;
 129
 130     d = pci_create_multifunction(bus, devfn, multifunction,
 131                                  "xio3130-downstream");
 132     if (!d) {
 133         return NULL;
 134     }
 135     br = PCI_BRIDGE(d);
 136
 137     qdev = DEVICE(d);
 138     pci_bridge_map_irq(br, bus_name, map_irq);
 139     qdev_prop_set_uint8(qdev, "port", port);
 140     qdev_prop_set_uint8(qdev, "chassis", chassis);
 141     qdev_prop_set_uint16(qdev, "slot", slot);
 142     qdev_init_nofail(qdev);
 143
 144     return PCIE_SLOT(d);
 145 }
 146
 147 static Property xio3130_downstream_props[] = {
 148     DEFINE_PROP_BIT(COMPAT_PROP_PCP, PCIDevice, cap_present,
 149                     QEMU_PCIE_SLTCAP_PCP_BITNR, true),
 150     DEFINE_PROP_END_OF_LIST()
 151 };
 152
 153 static const VMStateDescription vmstate_xio3130_downstream = {
 154     .name = "xio3130-express-downstream-port",
 155     .version_id = 1,
 156     .minimum_version_id = 1,
 157     .post_load = pcie_cap_slot_post_load,
 158     .fields = (VMStateField[]) {
 159         VMSTATE_PCIE_DEVICE(parent_obj.parent_obj.parent_obj, PCIESlot),
 160         VMSTATE_STRUCT(parent_obj.parent_obj.parent_obj.exp.aer_log,
 161                        PCIESlot, 0, vmstate_pcie_aer_log, PCIEAERLog),
 162         VMSTATE_END_OF_LIST()
 163     }
 164 };
 165
 166 static void xio3130_downstream_class_init(ObjectClass *klass, void *data)
 167 {
 168     DeviceClass *dc = DEVICE_CLASS(klass);
 169     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
 170
 171     k->is_express = 1;
 172     k->is_bridge = 1;
 173     k->config_write = xio3130_downstream_write_config;
 174     k->init = xio3130_downstream_initfn;
 175     k->exit = xio3130_downstream_exitfn;
 176     k->vendor_id = PCI_VENDOR_ID_TI;
 177     k->device_id = PCI_DEVICE_ID_TI_XIO3130D;
 178     k->revision = XIO3130_REVISION;
 179     set_bit(DEVICE_CATEGORY_BRIDGE, dc->categories);
 180     dc->desc = "TI X3130 Downstream Port of PCI Express Switch";
 181     dc->reset = xio3130_downstream_reset;
 182     dc->vmsd = &vmstate_xio3130_downstream;
 183     dc->props = xio3130_downstream_props;
 184 }
 185
 186 static const TypeInfo xio3130_downstream_info = {
 187     .name          = "xio3130-downstream",
 188     .parent        = TYPE_PCIE_SLOT,
 189     .class_init    = xio3130_downstream_class_init,
 190 };
 191
 192 static void xio3130_downstream_register_types(void)
 193 {
 194     type_register_static(&xio3130_downstream_info);
 195 }
 196
 197 type_init(xio3130_downstream_register_types)
 198
 199 /*
 200  * Local variables:
 201  *  c-indent-level: 4
 202  *  c-basic-offset: 4
 203  *  tab-width: 8
 204  *  indent-tab-mode: nil
 205  * End:
 206  */