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     /* TODO: AER */
  46 }
  47
  48 static void xio3130_downstream_reset(DeviceState *qdev)
  49 {
  50     PCIDevice *d = DO_UPCAST(PCIDevice, qdev, qdev);
  51     msi_reset(d);
  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
  65     rc = pci_bridge_initfn(d);
  66     if (rc < 0) {
  67         return rc;
  68     }
  69
  70     pcie_port_init_reg(d);
  71     pci_config_set_vendor_id(d->config, PCI_VENDOR_ID_TI);
  72     pci_config_set_device_id(d->config, PCI_DEVICE_ID_TI_XIO3130D);
  73     d->config[PCI_REVISION_ID] = XIO3130_REVISION;
  74
  75     rc = msi_init(d, XIO3130_MSI_OFFSET, XIO3130_MSI_NR_VECTOR,
  76                   XIO3130_MSI_SUPPORTED_FLAGS & PCI_MSI_FLAGS_64BIT,
  77                   XIO3130_MSI_SUPPORTED_FLAGS & PCI_MSI_FLAGS_MASKBIT);
  78     if (rc < 0) {
  79         return rc;
  80     }
  81     rc = pci_bridge_ssvid_init(d, XIO3130_SSVID_OFFSET,
  82                                XIO3130_SSVID_SVID, XIO3130_SSVID_SSID);
  83     if (rc < 0) {
  84         return rc;
  85     }
  86     rc = pcie_cap_init(d, XIO3130_EXP_OFFSET, PCI_EXP_TYPE_DOWNSTREAM,
  87                        p->port);
  88     if (rc < 0) {
  89         return rc;
  90     }
  91     pcie_cap_flr_init(d);       /* TODO: implement FLR */
  92     pcie_cap_deverr_init(d);
  93     pcie_cap_slot_init(d, s->slot);
  94     pcie_chassis_create(s->chassis);
  95     rc = pcie_chassis_add_slot(s);
  96     if (rc < 0) {
  97         return rc;
  98     }
  99     pcie_cap_ari_init(d);
 100     /* TODO: AER */
 101
 102     return 0;
 103 }
 104
 105 static int xio3130_downstream_exitfn(PCIDevice *d)
 106 {
 107     /* TODO: AER */
 108     msi_uninit(d);
 109     pcie_cap_exit(d);
 110     return pci_bridge_exitfn(d);
 111 }
 112
 113 PCIESlot *xio3130_downstream_init(PCIBus *bus, int devfn, bool multifunction,
 114                                   const char *bus_name, pci_map_irq_fn map_irq,
 115                                   uint8_t port, uint8_t chassis,
 116                                   uint16_t slot)
 117 {
 118     PCIDevice *d;
 119     PCIBridge *br;
 120     DeviceState *qdev;
 121
 122     d = pci_create_multifunction(bus, devfn, multifunction,
 123                                  "xio3130-downstream");
 124     if (!d) {
 125         return NULL;
 126     }
 127     br = DO_UPCAST(PCIBridge, dev, d);
 128
 129     qdev = &br->dev.qdev;
 130     pci_bridge_map_irq(br, bus_name, map_irq);
 131     qdev_prop_set_uint8(qdev, "port", port);
 132     qdev_prop_set_uint8(qdev, "chassis", chassis);
 133     qdev_prop_set_uint16(qdev, "slot", slot);
 134     qdev_init_nofail(qdev);
 135
 136     return DO_UPCAST(PCIESlot, port, DO_UPCAST(PCIEPort, br, br));
 137 }
 138
 139 static const VMStateDescription vmstate_xio3130_downstream = {
 140     .name = "xio3130-express-downstream-port",
 141     .version_id = 1,
 142     .minimum_version_id = 1,
 143     .minimum_version_id_old = 1,
 144     .post_load = pcie_cap_slot_post_load,
 145     .fields = (VMStateField[]) {
 146         VMSTATE_PCIE_DEVICE(port.br.dev, PCIESlot),
 147         /* TODO: AER */
 148         VMSTATE_END_OF_LIST()
 149     }
 150 };
 151
 152 static PCIDeviceInfo xio3130_downstream_info = {
 153     .qdev.name = "xio3130-downstream",
 154     .qdev.desc = "TI X3130 Downstream Port of PCI Express Switch",
 155     .qdev.size = sizeof(PCIESlot),
 156     .qdev.reset = xio3130_downstream_reset,
 157     .qdev.vmsd = &vmstate_xio3130_downstream,
 158
 159     .is_express = 1,
 160     .is_bridge = 1,
 161     .config_write = xio3130_downstream_write_config,
 162     .init = xio3130_downstream_initfn,
 163     .exit = xio3130_downstream_exitfn,
 164
 165     .qdev.props = (Property[]) {
 166         DEFINE_PROP_UINT8("port", PCIESlot, port.port, 0),
 167         DEFINE_PROP_UINT8("chassis", PCIESlot, chassis, 0),
 168         DEFINE_PROP_UINT16("slot", PCIESlot, slot, 0),
 169         /* TODO: AER */
 170         DEFINE_PROP_END_OF_LIST(),
 171     }
 172 };
 173
 174 static void xio3130_downstream_register(void)
 175 {
 176     pci_qdev_register(&xio3130_downstream_info);
 177 }
 178
 179 device_init(xio3130_downstream_register);
 180
 181 /*
 182  * Local variables:
 183  *  c-indent-level: 4
 184  *  c-basic-offset: 4
 185  *  tab-width: 8
 186  *  indent-tab-mode: nil
 187  * End:
 188  */