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/hotplug.h" 24 25 void pcie_port_init_reg(PCIDevice *d) 26 { 27 /* Unlike pci bridge, 28 66MHz and fast back to back don't apply to pci express port. */ 29 pci_set_word(d->config + PCI_STATUS, 0); 30 pci_set_word(d->config + PCI_SEC_STATUS, 0); 31 32 /* 33 * Unlike conventional pci bridge, for some bits the spec states: 34 * Does not apply to PCI Express and must be hardwired to 0. 35 */ 36 pci_word_test_and_clear_mask(d->wmask + PCI_BRIDGE_CONTROL, 37 PCI_BRIDGE_CTL_MASTER_ABORT | 38 PCI_BRIDGE_CTL_FAST_BACK | 39 PCI_BRIDGE_CTL_DISCARD | 40 PCI_BRIDGE_CTL_SEC_DISCARD | 41 PCI_BRIDGE_CTL_DISCARD_STATUS | 42 PCI_BRIDGE_CTL_DISCARD_SERR); 43 } 44 45 /************************************************************************** 46 * (chassis number, pcie physical slot number) -> pcie slot conversion 47 */ 48 struct PCIEChassis { 49 uint8_t number; 50 51 QLIST_HEAD(, PCIESlot) slots; 52 QLIST_ENTRY(PCIEChassis) next; 53 }; 54 55 static QLIST_HEAD(, PCIEChassis) chassis = QLIST_HEAD_INITIALIZER(chassis); 56 57 static struct PCIEChassis *pcie_chassis_find(uint8_t chassis_number) 58 { 59 struct PCIEChassis *c; 60 QLIST_FOREACH(c, &chassis, next) { 61 if (c->number == chassis_number) { 62 break; 63 } 64 } 65 return c; 66 } 67 68 void pcie_chassis_create(uint8_t chassis_number) 69 { 70 struct PCIEChassis *c; 71 c = pcie_chassis_find(chassis_number); 72 if (c) { 73 return; 74 } 75 c = g_malloc0(sizeof(*c)); 76 c->number = chassis_number; 77 QLIST_INIT(&c->slots); 78 QLIST_INSERT_HEAD(&chassis, c, next); 79 } 80 81 static PCIESlot *pcie_chassis_find_slot_with_chassis(struct PCIEChassis *c, 82 uint8_t slot) 83 { 84 PCIESlot *s; 85 QLIST_FOREACH(s, &c->slots, next) { 86 if (s->slot == slot) { 87 break; 88 } 89 } 90 return s; 91 } 92 93 PCIESlot *pcie_chassis_find_slot(uint8_t chassis_number, uint16_t slot) 94 { 95 struct PCIEChassis *c; 96 c = pcie_chassis_find(chassis_number); 97 if (!c) { 98 return NULL; 99 } 100 return pcie_chassis_find_slot_with_chassis(c, slot); 101 } 102 103 int pcie_chassis_add_slot(struct PCIESlot *slot) 104 { 105 struct PCIEChassis *c; 106 c = pcie_chassis_find(slot->chassis); 107 if (!c) { 108 return -ENODEV; 109 } 110 if (pcie_chassis_find_slot_with_chassis(c, slot->slot)) { 111 return -EBUSY; 112 } 113 QLIST_INSERT_HEAD(&c->slots, slot, next); 114 return 0; 115 } 116 117 void pcie_chassis_del_slot(PCIESlot *s) 118 { 119 QLIST_REMOVE(s, next); 120 } 121 122 static Property pcie_port_props[] = { 123 DEFINE_PROP_UINT8("port", PCIEPort, port, 0), 124 DEFINE_PROP_UINT16("aer_log_max", PCIEPort, 125 parent_obj.parent_obj.exp.aer_log.log_max, 126 PCIE_AER_LOG_MAX_DEFAULT), 127 DEFINE_PROP_END_OF_LIST() 128 }; 129 130 static void pcie_port_class_init(ObjectClass *oc, void *data) 131 { 132 DeviceClass *dc = DEVICE_CLASS(oc); 133 134 dc->props = pcie_port_props; 135 } 136 137 static const TypeInfo pcie_port_type_info = { 138 .name = TYPE_PCIE_PORT, 139 .parent = TYPE_PCI_BRIDGE, 140 .instance_size = sizeof(PCIEPort), 141 .abstract = true, 142 .class_init = pcie_port_class_init, 143 }; 144 145 static Property pcie_slot_props[] = { 146 DEFINE_PROP_UINT8("chassis", PCIESlot, chassis, 0), 147 DEFINE_PROP_UINT16("slot", PCIESlot, slot, 0), 148 DEFINE_PROP_END_OF_LIST() 149 }; 150 151 static void pcie_slot_class_init(ObjectClass *oc, void *data) 152 { 153 DeviceClass *dc = DEVICE_CLASS(oc); 154 HotplugHandlerClass *hc = HOTPLUG_HANDLER_CLASS(oc); 155 156 dc->props = pcie_slot_props; 157 hc->plug = pcie_cap_slot_hotplug_cb; 158 hc->unplug_request = pcie_cap_slot_hot_unplug_request_cb; 159 } 160 161 static const TypeInfo pcie_slot_type_info = { 162 .name = TYPE_PCIE_SLOT, 163 .parent = TYPE_PCIE_PORT, 164 .instance_size = sizeof(PCIESlot), 165 .abstract = true, 166 .class_init = pcie_slot_class_init, 167 .interfaces = (InterfaceInfo[]) { 168 { TYPE_HOTPLUG_HANDLER }, 169 { } 170 } 171 }; 172 173 static void pcie_port_register_types(void) 174 { 175 type_register_static(&pcie_port_type_info); 176 type_register_static(&pcie_slot_type_info); 177 } 178 179 type_init(pcie_port_register_types) 180