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 23 void pcie_port_init_reg(PCIDevice *d) 24 { 25 /* Unlike pci bridge, 26 66MHz and fast back to back don't apply to pci express port. */ 27 pci_set_word(d->config + PCI_STATUS, 0); 28 pci_set_word(d->config + PCI_SEC_STATUS, 0); 29 30 /* Unlike conventional pci bridge, some bits are hardwired to 0. */ 31 pci_set_word(d->wmask + PCI_BRIDGE_CONTROL, 32 PCI_BRIDGE_CTL_PARITY | 33 PCI_BRIDGE_CTL_ISA | 34 PCI_BRIDGE_CTL_VGA | 35 PCI_BRIDGE_CTL_SERR | 36 PCI_BRIDGE_CTL_BUS_RESET); 37 } 38 39 /************************************************************************** 40 * (chassis number, pcie physical slot number) -> pcie slot conversion 41 */ 42 struct PCIEChassis { 43 uint8_t number; 44 45 QLIST_HEAD(, PCIESlot) slots; 46 QLIST_ENTRY(PCIEChassis) next; 47 }; 48 49 static QLIST_HEAD(, PCIEChassis) chassis = QLIST_HEAD_INITIALIZER(chassis); 50 51 static struct PCIEChassis *pcie_chassis_find(uint8_t chassis_number) 52 { 53 struct PCIEChassis *c; 54 QLIST_FOREACH(c, &chassis, next) { 55 if (c->number == chassis_number) { 56 break; 57 } 58 } 59 return c; 60 } 61 62 void pcie_chassis_create(uint8_t chassis_number) 63 { 64 struct PCIEChassis *c; 65 c = pcie_chassis_find(chassis_number); 66 if (c) { 67 return; 68 } 69 c = g_malloc0(sizeof(*c)); 70 c->number = chassis_number; 71 QLIST_INIT(&c->slots); 72 QLIST_INSERT_HEAD(&chassis, c, next); 73 } 74 75 static PCIESlot *pcie_chassis_find_slot_with_chassis(struct PCIEChassis *c, 76 uint8_t slot) 77 { 78 PCIESlot *s; 79 QLIST_FOREACH(s, &c->slots, next) { 80 if (s->slot == slot) { 81 break; 82 } 83 } 84 return s; 85 } 86 87 PCIESlot *pcie_chassis_find_slot(uint8_t chassis_number, uint16_t slot) 88 { 89 struct PCIEChassis *c; 90 c = pcie_chassis_find(chassis_number); 91 if (!c) { 92 return NULL; 93 } 94 return pcie_chassis_find_slot_with_chassis(c, slot); 95 } 96 97 int pcie_chassis_add_slot(struct PCIESlot *slot) 98 { 99 struct PCIEChassis *c; 100 c = pcie_chassis_find(slot->chassis); 101 if (!c) { 102 return -ENODEV; 103 } 104 if (pcie_chassis_find_slot_with_chassis(c, slot->slot)) { 105 return -EBUSY; 106 } 107 QLIST_INSERT_HEAD(&c->slots, slot, next); 108 return 0; 109 } 110 111 void pcie_chassis_del_slot(PCIESlot *s) 112 { 113 QLIST_REMOVE(s, next); 114 } 115