hw/pci-bridge/pcie_root_port.c

   1 /*
   2  * Base class for PCI Express Root Ports
   3  *
   4  * Copyright (C) 2017 Red Hat Inc
   5  *
   6  * Authors:
   7  *   Marcel Apfelbaum <marcel@redhat.com>
   8  *
   9  * Most of the code was migrated from hw/pci-bridge/ioh3420.
  10  *
  11  * This work is licensed under the terms of the GNU GPL, version 2 or later.
  12  * See the COPYING file in the top-level directory.
  13  */
  14
  15 #include "qemu/osdep.h"
  16 #include "qapi/error.h"
  17 #include "qemu/module.h"
  18 #include "hw/pci/pcie_port.h"
  19
  20 static void rp_aer_vector_update(PCIDevice *d)
  21 {
  22     PCIERootPortClass *rpc = PCIE_ROOT_PORT_GET_CLASS(d);
  23
  24     if (rpc->aer_vector) {
  25         pcie_aer_root_set_vector(d, rpc->aer_vector(d));
  26     }
  27 }
  28
  29 static void rp_write_config(PCIDevice *d, uint32_t address,
  30                             uint32_t val, int len)
  31 {
  32     uint32_t root_cmd =
  33         pci_get_long(d->config + d->exp.aer_cap + PCI_ERR_ROOT_COMMAND);
  34     uint16_t slt_ctl, slt_sta;
  35
  36     pcie_cap_slot_get(d, &slt_ctl, &slt_sta);
  37
  38     pci_bridge_write_config(d, address, val, len);
  39     rp_aer_vector_update(d);
  40     pcie_cap_slot_write_config(d, slt_ctl, slt_sta, address, val, len);
  41     pcie_aer_write_config(d, address, val, len);
  42     pcie_aer_root_write_config(d, address, val, len, root_cmd);
  43 }
  44
  45 static void rp_reset(DeviceState *qdev)
  46 {
  47     PCIDevice *d = PCI_DEVICE(qdev);
  48
  49     rp_aer_vector_update(d);
  50     pcie_cap_root_reset(d);
  51     pcie_cap_deverr_reset(d);
  52     pcie_cap_slot_reset(d);
  53     pcie_cap_arifwd_reset(d);
  54     pcie_acs_reset(d);
  55     pcie_aer_root_reset(d);
  56     pci_bridge_reset(qdev);
  57     pci_bridge_disable_base_limit(d);
  58 }
  59
  60 static void rp_realize(PCIDevice *d, Error **errp)
  61 {
  62     PCIEPort *p = PCIE_PORT(d);
  63     PCIESlot *s = PCIE_SLOT(d);
  64     PCIDeviceClass *dc = PCI_DEVICE_GET_CLASS(d);
  65     PCIERootPortClass *rpc = PCIE_ROOT_PORT_GET_CLASS(d);
  66     int rc;
  67
  68     pci_config_set_interrupt_pin(d->config, 1);
  69     pci_bridge_initfn(d, TYPE_PCIE_BUS);
  70     pcie_port_init_reg(d);
  71
  72     rc = pci_bridge_ssvid_init(d, rpc->ssvid_offset, dc->vendor_id,
  73                                rpc->ssid, errp);
  74     if (rc < 0) {
  75         error_append_hint(errp, "Can't init SSV ID, error %d\n", rc);
  76         goto err_bridge;
  77     }
  78
  79     if (rpc->interrupts_init) {
  80         rc = rpc->interrupts_init(d, errp);
  81         if (rc < 0) {
  82             goto err_bridge;
  83         }
  84     }
  85
  86     rc = pcie_cap_init(d, rpc->exp_offset, PCI_EXP_TYPE_ROOT_PORT,
  87                        p->port, errp);
  88     if (rc < 0) {
  89         error_append_hint(errp, "Can't add Root Port capability, "
  90                           "error %d\n", rc);
  91         goto err_int;
  92     }
  93
  94     pcie_cap_arifwd_init(d);
  95     pcie_cap_deverr_init(d);
  96     pcie_cap_slot_init(d, s->slot);
  97     pcie_cap_root_init(d);
  98
  99     pcie_chassis_create(s->chassis);
 100     rc = pcie_chassis_add_slot(s);
 101     if (rc < 0) {
 102         error_setg(errp, "Can't add chassis slot, error %d", rc);
 103         goto err_pcie_cap;
 104     }
 105
 106     rc = pcie_aer_init(d, PCI_ERR_VER, rpc->aer_offset,
 107                        PCI_ERR_SIZEOF, errp);
 108     if (rc < 0) {
 109         goto err;
 110     }
 111     pcie_aer_root_init(d);
 112     rp_aer_vector_update(d);
 113
 114     if (rpc->acs_offset && !s->disable_acs) {
 115         pcie_acs_init(d, rpc->acs_offset);
 116     }
 117     return;
 118
 119 err:
 120     pcie_chassis_del_slot(s);
 121 err_pcie_cap:
 122     pcie_cap_exit(d);
 123 err_int:
 124     if (rpc->interrupts_uninit) {
 125         rpc->interrupts_uninit(d);
 126     }
 127 err_bridge:
 128     pci_bridge_exitfn(d);
 129 }
 130
 131 static void rp_exit(PCIDevice *d)
 132 {
 133     PCIERootPortClass *rpc = PCIE_ROOT_PORT_GET_CLASS(d);
 134     PCIESlot *s = PCIE_SLOT(d);
 135
 136     pcie_aer_exit(d);
 137     pcie_chassis_del_slot(s);
 138     pcie_cap_exit(d);
 139     if (rpc->interrupts_uninit) {
 140         rpc->interrupts_uninit(d);
 141     }
 142     pci_bridge_exitfn(d);
 143 }
 144
 145 static Property rp_props[] = {
 146     DEFINE_PROP_BIT(COMPAT_PROP_PCP, PCIDevice, cap_present,
 147                     QEMU_PCIE_SLTCAP_PCP_BITNR, true),
 148     DEFINE_PROP_BOOL("disable-acs", PCIESlot, disable_acs, false),
 149     DEFINE_PROP_END_OF_LIST()
 150 };
 151
 152 static void rp_instance_post_init(Object *obj)
 153 {
 154     PCIESlot *s = PCIE_SLOT(obj);
 155
 156     if (!s->speed) {
 157         s->speed = QEMU_PCI_EXP_LNK_2_5GT;
 158     }
 159
 160     if (!s->width) {
 161         s->width = QEMU_PCI_EXP_LNK_X1;
 162     }
 163 }
 164
 165 static void rp_class_init(ObjectClass *klass, void *data)
 166 {
 167     DeviceClass *dc = DEVICE_CLASS(klass);
 168     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
 169
 170     k->is_bridge = true;
 171     k->config_write = rp_write_config;
 172     k->realize = rp_realize;
 173     k->exit = rp_exit;
 174     set_bit(DEVICE_CATEGORY_BRIDGE, dc->categories);
 175     dc->reset = rp_reset;
 176     dc->props = rp_props;
 177 }
 178
 179 static const TypeInfo rp_info = {
 180     .name          = TYPE_PCIE_ROOT_PORT,
 181     .parent        = TYPE_PCIE_SLOT,
 182     .instance_post_init = rp_instance_post_init,
 183     .class_init    = rp_class_init,
 184     .abstract      = true,
 185     .class_size = sizeof(PCIERootPortClass),
 186     .interfaces = (InterfaceInfo[]) {
 187         { INTERFACE_PCIE_DEVICE },
 188         { }
 189     },
 190 };
 191
 192 static void rp_register_types(void)
 193 {
 194     type_register_static(&rp_info);
 195 }
 196
 197 type_init(rp_register_types)