1 /* 2 * pcie_port.c 3 * 4 * Copyright (c) 2010 Isaku Yamahata <yamahata at valinux co jp> 5 * VA Linux Systems Japan K.K. 6 * 7 * This program is free software; you can redistribute it and/or modify 8 * it under the terms of the GNU General Public License as published by 9 * the Free Software Foundation; either version 2 of the License, or 10 * (at your option) any later version. 11 * 12 * This program is distributed in the hope that it will be useful, 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 * GNU General Public License for more details. 16 * 17 * You should have received a copy of the GNU General Public License along 18 * with this program; if not, see <http://www.gnu.org/licenses/>. 19 */ 20 21 #include "qemu/osdep.h" 22 #include "hw/pci/pcie_port.h" 23 #include "hw/qdev-properties.h" 24 #include "qemu/module.h" 25 #include "hw/hotplug.h" 26 27 void pcie_port_init_reg(PCIDevice *d) 28 { 29 /* Unlike pci bridge, 30 66MHz and fast back to back don't apply to pci express port. */ 31 pci_set_word(d->config + PCI_STATUS, 0); 32 pci_set_word(d->config + PCI_SEC_STATUS, 0); 33 34 /* 35 * Unlike conventional pci bridge, for some bits the spec states: 36 * Does not apply to PCI Express and must be hardwired to 0. 37 */ 38 pci_word_test_and_clear_mask(d->wmask + PCI_BRIDGE_CONTROL, 39 PCI_BRIDGE_CTL_MASTER_ABORT | 40 PCI_BRIDGE_CTL_FAST_BACK | 41 PCI_BRIDGE_CTL_DISCARD | 42 PCI_BRIDGE_CTL_SEC_DISCARD | 43 PCI_BRIDGE_CTL_DISCARD_STATUS | 44 PCI_BRIDGE_CTL_DISCARD_SERR); 45 } 46 47 /************************************************************************** 48 * (chassis number, pcie physical slot number) -> pcie slot conversion 49 */ 50 struct PCIEChassis { 51 uint8_t number; 52 53 QLIST_HEAD(, PCIESlot) slots; 54 QLIST_ENTRY(PCIEChassis) next; 55 }; 56 57 static QLIST_HEAD(, PCIEChassis) chassis = QLIST_HEAD_INITIALIZER(chassis); 58 59 static struct PCIEChassis *pcie_chassis_find(uint8_t chassis_number) 60 { 61 struct PCIEChassis *c; 62 QLIST_FOREACH(c, &chassis, next) { 63 if (c->number == chassis_number) { 64 break; 65 } 66 } 67 return c; 68 } 69 70 void pcie_chassis_create(uint8_t chassis_number) 71 { 72 struct PCIEChassis *c; 73 c = pcie_chassis_find(chassis_number); 74 if (c) { 75 return; 76 } 77 c = g_malloc0(sizeof(*c)); 78 c->number = chassis_number; 79 QLIST_INIT(&c->slots); 80 QLIST_INSERT_HEAD(&chassis, c, next); 81 } 82 83 static PCIESlot *pcie_chassis_find_slot_with_chassis(struct PCIEChassis *c, 84 uint8_t slot) 85 { 86 PCIESlot *s; 87 QLIST_FOREACH(s, &c->slots, next) { 88 if (s->slot == slot) { 89 break; 90 } 91 } 92 return s; 93 } 94 95 PCIESlot *pcie_chassis_find_slot(uint8_t chassis_number, uint16_t slot) 96 { 97 struct PCIEChassis *c; 98 c = pcie_chassis_find(chassis_number); 99 if (!c) { 100 return NULL; 101 } 102 return pcie_chassis_find_slot_with_chassis(c, slot); 103 } 104 105 int pcie_chassis_add_slot(struct PCIESlot *slot) 106 { 107 struct PCIEChassis *c; 108 c = pcie_chassis_find(slot->chassis); 109 if (!c) { 110 return -ENODEV; 111 } 112 if (pcie_chassis_find_slot_with_chassis(c, slot->slot)) { 113 return -EBUSY; 114 } 115 QLIST_INSERT_HEAD(&c->slots, slot, next); 116 return 0; 117 } 118 119 void pcie_chassis_del_slot(PCIESlot *s) 120 { 121 QLIST_REMOVE(s, next); 122 } 123 124 static Property pcie_port_props[] = { 125 DEFINE_PROP_UINT8("port", PCIEPort, port, 0), 126 DEFINE_PROP_UINT16("aer_log_max", PCIEPort, 127 parent_obj.parent_obj.exp.aer_log.log_max, 128 PCIE_AER_LOG_MAX_DEFAULT), 129 DEFINE_PROP_END_OF_LIST() 130 }; 131 132 static void pcie_port_class_init(ObjectClass *oc, void *data) 133 { 134 DeviceClass *dc = DEVICE_CLASS(oc); 135 136 device_class_set_props(dc, pcie_port_props); 137 } 138 139 PCIDevice *pcie_find_port_by_pn(PCIBus *bus, uint8_t pn) 140 { 141 int devfn; 142 143 for (devfn = 0; devfn < ARRAY_SIZE(bus->devices); devfn++) { 144 PCIDevice *d = bus->devices[devfn]; 145 PCIEPort *port; 146 147 if (!d || !pci_is_express(d) || !d->exp.exp_cap) { 148 continue; 149 } 150 151 if (!object_dynamic_cast(OBJECT(d), TYPE_PCIE_PORT)) { 152 continue; 153 } 154 155 port = PCIE_PORT(d); 156 if (port->port == pn) { 157 return d; 158 } 159 } 160 161 return NULL; 162 } 163 164 /* Find first port in devfn number order */ 165 PCIDevice *pcie_find_port_first(PCIBus *bus) 166 { 167 int devfn; 168 169 for (devfn = 0; devfn < ARRAY_SIZE(bus->devices); devfn++) { 170 PCIDevice *d = bus->devices[devfn]; 171 172 if (!d || !pci_is_express(d) || !d->exp.exp_cap) { 173 continue; 174 } 175 176 if (object_dynamic_cast(OBJECT(d), TYPE_PCIE_PORT)) { 177 return d; 178 } 179 } 180 181 return NULL; 182 } 183 184 int pcie_count_ds_ports(PCIBus *bus) 185 { 186 int dsp_count = 0; 187 int devfn; 188 189 for (devfn = 0; devfn < ARRAY_SIZE(bus->devices); devfn++) { 190 PCIDevice *d = bus->devices[devfn]; 191 192 if (!d || !pci_is_express(d) || !d->exp.exp_cap) { 193 continue; 194 } 195 if (object_dynamic_cast(OBJECT(d), TYPE_PCIE_PORT)) { 196 dsp_count++; 197 } 198 } 199 return dsp_count; 200 } 201 202 static bool pcie_slot_is_hotpluggbale_bus(HotplugHandler *plug_handler, 203 BusState *bus) 204 { 205 PCIESlot *s = PCIE_SLOT(bus->parent); 206 return s->hotplug; 207 } 208 209 static const TypeInfo pcie_port_type_info = { 210 .name = TYPE_PCIE_PORT, 211 .parent = TYPE_PCI_BRIDGE, 212 .instance_size = sizeof(PCIEPort), 213 .abstract = true, 214 .class_init = pcie_port_class_init, 215 }; 216 217 static Property pcie_slot_props[] = { 218 DEFINE_PROP_UINT8("chassis", PCIESlot, chassis, 0), 219 DEFINE_PROP_UINT16("slot", PCIESlot, slot, 0), 220 DEFINE_PROP_BOOL("hotplug", PCIESlot, hotplug, true), 221 DEFINE_PROP_BOOL("x-do-not-expose-native-hotplug-cap", PCIESlot, 222 hide_native_hotplug_cap, false), 223 DEFINE_PROP_END_OF_LIST() 224 }; 225 226 static void pcie_slot_class_init(ObjectClass *oc, void *data) 227 { 228 DeviceClass *dc = DEVICE_CLASS(oc); 229 HotplugHandlerClass *hc = HOTPLUG_HANDLER_CLASS(oc); 230 231 device_class_set_props(dc, pcie_slot_props); 232 hc->pre_plug = pcie_cap_slot_pre_plug_cb; 233 hc->plug = pcie_cap_slot_plug_cb; 234 hc->unplug = pcie_cap_slot_unplug_cb; 235 hc->unplug_request = pcie_cap_slot_unplug_request_cb; 236 hc->is_hotpluggable_bus = pcie_slot_is_hotpluggbale_bus; 237 } 238 239 static const TypeInfo pcie_slot_type_info = { 240 .name = TYPE_PCIE_SLOT, 241 .parent = TYPE_PCIE_PORT, 242 .instance_size = sizeof(PCIESlot), 243 .abstract = true, 244 .class_init = pcie_slot_class_init, 245 .interfaces = (InterfaceInfo[]) { 246 { TYPE_HOTPLUG_HANDLER }, 247 { } 248 } 249 }; 250 251 static void pcie_port_register_types(void) 252 { 253 type_register_static(&pcie_port_type_info); 254 type_register_static(&pcie_slot_type_info); 255 } 256 257 type_init(pcie_port_register_types) 258