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 "hw/pci/pcie_port.h" 22 #include "hw/hotplug.h" 23 24 void pcie_port_init_reg(PCIDevice *d) 25 { 26 /* Unlike pci bridge, 27 66MHz and fast back to back don't apply to pci express port. */ 28 pci_set_word(d->config + PCI_STATUS, 0); 29 pci_set_word(d->config + PCI_SEC_STATUS, 0); 30 31 /* 32 * Unlike conventional pci bridge, for some bits the spec states: 33 * Does not apply to PCI Express and must be hardwired to 0. 34 */ 35 pci_word_test_and_clear_mask(d->wmask + PCI_BRIDGE_CONTROL, 36 PCI_BRIDGE_CTL_MASTER_ABORT | 37 PCI_BRIDGE_CTL_FAST_BACK | 38 PCI_BRIDGE_CTL_DISCARD | 39 PCI_BRIDGE_CTL_SEC_DISCARD | 40 PCI_BRIDGE_CTL_DISCARD_STATUS | 41 PCI_BRIDGE_CTL_DISCARD_SERR); 42 } 43 44 /************************************************************************** 45 * (chassis number, pcie physical slot number) -> pcie slot conversion 46 */ 47 struct PCIEChassis { 48 uint8_t number; 49 50 QLIST_HEAD(, PCIESlot) slots; 51 QLIST_ENTRY(PCIEChassis) next; 52 }; 53 54 static QLIST_HEAD(, PCIEChassis) chassis = QLIST_HEAD_INITIALIZER(chassis); 55 56 static struct PCIEChassis *pcie_chassis_find(uint8_t chassis_number) 57 { 58 struct PCIEChassis *c; 59 QLIST_FOREACH(c, &chassis, next) { 60 if (c->number == chassis_number) { 61 break; 62 } 63 } 64 return c; 65 } 66 67 void pcie_chassis_create(uint8_t chassis_number) 68 { 69 struct PCIEChassis *c; 70 c = pcie_chassis_find(chassis_number); 71 if (c) { 72 return; 73 } 74 c = g_malloc0(sizeof(*c)); 75 c->number = chassis_number; 76 QLIST_INIT(&c->slots); 77 QLIST_INSERT_HEAD(&chassis, c, next); 78 } 79 80 static PCIESlot *pcie_chassis_find_slot_with_chassis(struct PCIEChassis *c, 81 uint8_t slot) 82 { 83 PCIESlot *s; 84 QLIST_FOREACH(s, &c->slots, next) { 85 if (s->slot == slot) { 86 break; 87 } 88 } 89 return s; 90 } 91 92 PCIESlot *pcie_chassis_find_slot(uint8_t chassis_number, uint16_t slot) 93 { 94 struct PCIEChassis *c; 95 c = pcie_chassis_find(chassis_number); 96 if (!c) { 97 return NULL; 98 } 99 return pcie_chassis_find_slot_with_chassis(c, slot); 100 } 101 102 int pcie_chassis_add_slot(struct PCIESlot *slot) 103 { 104 struct PCIEChassis *c; 105 c = pcie_chassis_find(slot->chassis); 106 if (!c) { 107 return -ENODEV; 108 } 109 if (pcie_chassis_find_slot_with_chassis(c, slot->slot)) { 110 return -EBUSY; 111 } 112 QLIST_INSERT_HEAD(&c->slots, slot, next); 113 return 0; 114 } 115 116 void pcie_chassis_del_slot(PCIESlot *s) 117 { 118 QLIST_REMOVE(s, next); 119 } 120 121 static Property pcie_port_props[] = { 122 DEFINE_PROP_UINT8("port", PCIEPort, port, 0), 123 DEFINE_PROP_UINT16("aer_log_max", PCIEPort, 124 parent_obj.parent_obj.exp.aer_log.log_max, 125 PCIE_AER_LOG_MAX_DEFAULT), 126 DEFINE_PROP_END_OF_LIST() 127 }; 128 129 static void pcie_port_class_init(ObjectClass *oc, void *data) 130 { 131 DeviceClass *dc = DEVICE_CLASS(oc); 132 133 dc->props = pcie_port_props; 134 } 135 136 static const TypeInfo pcie_port_type_info = { 137 .name = TYPE_PCIE_PORT, 138 .parent = TYPE_PCI_BRIDGE, 139 .instance_size = sizeof(PCIEPort), 140 .abstract = true, 141 .class_init = pcie_port_class_init, 142 }; 143 144 static Property pcie_slot_props[] = { 145 DEFINE_PROP_UINT8("chassis", PCIESlot, chassis, 0), 146 DEFINE_PROP_UINT16("slot", PCIESlot, slot, 0), 147 DEFINE_PROP_END_OF_LIST() 148 }; 149 150 static void pcie_slot_class_init(ObjectClass *oc, void *data) 151 { 152 DeviceClass *dc = DEVICE_CLASS(oc); 153 HotplugHandlerClass *hc = HOTPLUG_HANDLER_CLASS(oc); 154 155 dc->props = pcie_slot_props; 156 hc->plug = pcie_cap_slot_hotplug_cb; 157 hc->unplug = pcie_cap_slot_hot_unplug_cb; 158 } 159 160 static const TypeInfo pcie_slot_type_info = { 161 .name = TYPE_PCIE_SLOT, 162 .parent = TYPE_PCIE_PORT, 163 .instance_size = sizeof(PCIESlot), 164 .abstract = true, 165 .class_init = pcie_slot_class_init, 166 .interfaces = (InterfaceInfo[]) { 167 { TYPE_HOTPLUG_HANDLER }, 168 { } 169 } 170 }; 171 172 static void pcie_port_register_types(void) 173 { 174 type_register_static(&pcie_port_type_info); 175 type_register_static(&pcie_slot_type_info); 176 } 177 178 type_init(pcie_port_register_types) 179