hw/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 "pci_ids.h"
  23 #include "msi.h"
  24 #include "pcie.h"
  25 #include "xio3130_downstream.h"
  26
  27 #define PCI_DEVICE_ID_TI_XIO3130D       0x8233  /* downstream port */
  28 #define XIO3130_REVISION                0x1
  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_downstream_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_cap_slot_write_config(d, address, val, len);
  44     msi_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_ari_reset(d);
  55     pci_bridge_reset(qdev);
  56 }
  57
  58 static int xio3130_downstream_initfn(PCIDevice *d)
  59 {
  60     PCIBridge* br = DO_UPCAST(PCIBridge, dev, d);
  61     PCIEPort *p = DO_UPCAST(PCIEPort, br, br);
  62     PCIESlot *s = DO_UPCAST(PCIESlot, port, p);
  63     int rc;
  64     int tmp;
  65
  66     rc = pci_bridge_initfn(d);
  67     if (rc < 0) {
  68         return rc;
  69     }
  70
  71     pcie_port_init_reg(d);
  72
  73     rc = msi_init(d, XIO3130_MSI_OFFSET, XIO3130_MSI_NR_VECTOR,
  74                   XIO3130_MSI_SUPPORTED_FLAGS & PCI_MSI_FLAGS_64BIT,
  75                   XIO3130_MSI_SUPPORTED_FLAGS & PCI_MSI_FLAGS_MASKBIT);
  76     if (rc < 0) {
  77         goto err_bridge;
  78     }
  79     rc = pci_bridge_ssvid_init(d, XIO3130_SSVID_OFFSET,
  80                                XIO3130_SSVID_SVID, XIO3130_SSVID_SSID);
  81     if (rc < 0) {
  82         goto err_bridge;
  83     }
  84     rc = pcie_cap_init(d, XIO3130_EXP_OFFSET, PCI_EXP_TYPE_DOWNSTREAM,
  85                        p->port);
  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_chassis_create(s->chassis);
  93     rc = pcie_chassis_add_slot(s);
  94     if (rc < 0) {
  95         goto err_pcie_cap;
  96     }
  97     pcie_cap_ari_init(d);
  98     rc = pcie_aer_init(d, XIO3130_AER_OFFSET);
  99     if (rc < 0) {
 100         goto err;
 101     }
 102
 103     return 0;
 104
 105 err:
 106     pcie_chassis_del_slot(s);
 107 err_pcie_cap:
 108     pcie_cap_exit(d);
 109 err_msi:
 110     msi_uninit(d);
 111 err_bridge:
 112     tmp = pci_bridge_exitfn(d);
 113     assert(!tmp);
 114     return rc;
 115 }
 116
 117 static int xio3130_downstream_exitfn(PCIDevice *d)
 118 {
 119     PCIBridge* br = DO_UPCAST(PCIBridge, dev, d);
 120     PCIEPort *p = DO_UPCAST(PCIEPort, br, br);
 121     PCIESlot *s = DO_UPCAST(PCIESlot, port, p);
 122
 123     pcie_aer_exit(d);
 124     pcie_chassis_del_slot(s);
 125     pcie_cap_exit(d);
 126     msi_uninit(d);
 127     return pci_bridge_exitfn(d);
 128 }
 129
 130 PCIESlot *xio3130_downstream_init(PCIBus *bus, int devfn, bool multifunction,
 131                                   const char *bus_name, pci_map_irq_fn map_irq,
 132                                   uint8_t port, uint8_t chassis,
 133                                   uint16_t slot)
 134 {
 135     PCIDevice *d;
 136     PCIBridge *br;
 137     DeviceState *qdev;
 138
 139     d = pci_create_multifunction(bus, devfn, multifunction,
 140                                  "xio3130-downstream");
 141     if (!d) {
 142         return NULL;
 143     }
 144     br = DO_UPCAST(PCIBridge, dev, d);
 145
 146     qdev = &br->dev.qdev;
 147     pci_bridge_map_irq(br, bus_name, map_irq);
 148     qdev_prop_set_uint8(qdev, "port", port);
 149     qdev_prop_set_uint8(qdev, "chassis", chassis);
 150     qdev_prop_set_uint16(qdev, "slot", slot);
 151     qdev_init_nofail(qdev);
 152
 153     return DO_UPCAST(PCIESlot, port, DO_UPCAST(PCIEPort, br, br));
 154 }
 155
 156 static const VMStateDescription vmstate_xio3130_downstream = {
 157     .name = "xio3130-express-downstream-port",
 158     .version_id = 1,
 159     .minimum_version_id = 1,
 160     .minimum_version_id_old = 1,
 161     .post_load = pcie_cap_slot_post_load,
 162     .fields = (VMStateField[]) {
 163         VMSTATE_PCIE_DEVICE(port.br.dev, PCIESlot),
 164         VMSTATE_STRUCT(port.br.dev.exp.aer_log, PCIESlot, 0,
 165                        vmstate_pcie_aer_log, PCIEAERLog),
 166         VMSTATE_END_OF_LIST()
 167     }
 168 };
 169
 170 static Property xio3130_downstream_properties[] = {
 171     DEFINE_PROP_UINT8("port", PCIESlot, port.port, 0),
 172     DEFINE_PROP_UINT8("chassis", PCIESlot, chassis, 0),
 173     DEFINE_PROP_UINT16("slot", PCIESlot, slot, 0),
 174     DEFINE_PROP_UINT16("aer_log_max", PCIESlot,
 175     port.br.dev.exp.aer_log.log_max,
 176     PCIE_AER_LOG_MAX_DEFAULT),
 177     DEFINE_PROP_END_OF_LIST(),
 178 };
 179
 180 static void xio3130_downstream_class_init(ObjectClass *klass, void *data)
 181 {
 182     DeviceClass *dc = DEVICE_CLASS(klass);
 183     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
 184
 185     k->is_express = 1;
 186     k->is_bridge = 1;
 187     k->config_write = xio3130_downstream_write_config;
 188     k->init = xio3130_downstream_initfn;
 189     k->exit = xio3130_downstream_exitfn;
 190     k->vendor_id = PCI_VENDOR_ID_TI;
 191     k->device_id = PCI_DEVICE_ID_TI_XIO3130D;
 192     k->revision = XIO3130_REVISION;
 193     dc->desc = "TI X3130 Downstream Port of PCI Express Switch";
 194     dc->reset = xio3130_downstream_reset;
 195     dc->vmsd = &vmstate_xio3130_downstream;
 196     dc->props = xio3130_downstream_properties;
 197 }
 198
 199 static TypeInfo xio3130_downstream_info = {
 200     .name          = "xio3130-downstream",
 201     .parent        = TYPE_PCI_DEVICE,
 202     .instance_size = sizeof(PCIESlot),
 203     .class_init    = xio3130_downstream_class_init,
 204 };
 205
 206 static void xio3130_downstream_register_types(void)
 207 {
 208     type_register_static(&xio3130_downstream_info);
 209 }
 210
 211 type_init(xio3130_downstream_register_types)
 212
 213 /*
 214  * Local variables:
 215  *  c-indent-level: 4
 216  *  c-basic-offset: 4
 217  *  tab-width: 8
 218  *  indent-tab-mode: nil
 219  * End:
 220  */