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 static const TypeInfo pcie_port_type_info = { 140 .name = TYPE_PCIE_PORT, 141 .parent = TYPE_PCI_BRIDGE, 142 .instance_size = sizeof(PCIEPort), 143 .abstract = true, 144 .class_init = pcie_port_class_init, 145 }; 146 147 static Property pcie_slot_props[] = { 148 DEFINE_PROP_UINT8("chassis", PCIESlot, chassis, 0), 149 DEFINE_PROP_UINT16("slot", PCIESlot, slot, 0), 150 DEFINE_PROP_BOOL("hotplug", PCIESlot, hotplug, true), 151 DEFINE_PROP_END_OF_LIST() 152 }; 153 154 static void pcie_slot_class_init(ObjectClass *oc, void *data) 155 { 156 DeviceClass *dc = DEVICE_CLASS(oc); 157 HotplugHandlerClass *hc = HOTPLUG_HANDLER_CLASS(oc); 158 159 device_class_set_props(dc, pcie_slot_props); 160 hc->pre_plug = pcie_cap_slot_pre_plug_cb; 161 hc->plug = pcie_cap_slot_plug_cb; 162 hc->unplug = pcie_cap_slot_unplug_cb; 163 hc->unplug_request = pcie_cap_slot_unplug_request_cb; 164 } 165 166 static const TypeInfo pcie_slot_type_info = { 167 .name = TYPE_PCIE_SLOT, 168 .parent = TYPE_PCIE_PORT, 169 .instance_size = sizeof(PCIESlot), 170 .abstract = true, 171 .class_init = pcie_slot_class_init, 172 .interfaces = (InterfaceInfo[]) { 173 { TYPE_HOTPLUG_HANDLER }, 174 { } 175 } 176 }; 177 178 static void pcie_port_register_types(void) 179 { 180 type_register_static(&pcie_port_type_info); 181 type_register_static(&pcie_slot_type_info); 182 } 183 184 type_init(pcie_port_register_types) 185