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 #define PCI_BRIDGE_CTL_VGA_16BIT 0x10 /* VGA 16-bit decode */ 32 pci_set_word(d->wmask + PCI_BRIDGE_CONTROL, 33 PCI_BRIDGE_CTL_PARITY | 34 PCI_BRIDGE_CTL_ISA | 35 PCI_BRIDGE_CTL_VGA | 36 PCI_BRIDGE_CTL_VGA_16BIT | /* Req, but no alias support yet */ 37 PCI_BRIDGE_CTL_SERR | 38 PCI_BRIDGE_CTL_BUS_RESET); 39 } 40 41 /************************************************************************** 42 * (chassis number, pcie physical slot number) -> pcie slot conversion 43 */ 44 struct PCIEChassis { 45 uint8_t number; 46 47 QLIST_HEAD(, PCIESlot) slots; 48 QLIST_ENTRY(PCIEChassis) next; 49 }; 50 51 static QLIST_HEAD(, PCIEChassis) chassis = QLIST_HEAD_INITIALIZER(chassis); 52 53 static struct PCIEChassis *pcie_chassis_find(uint8_t chassis_number) 54 { 55 struct PCIEChassis *c; 56 QLIST_FOREACH(c, &chassis, next) { 57 if (c->number == chassis_number) { 58 break; 59 } 60 } 61 return c; 62 } 63 64 void pcie_chassis_create(uint8_t chassis_number) 65 { 66 struct PCIEChassis *c; 67 c = pcie_chassis_find(chassis_number); 68 if (c) { 69 return; 70 } 71 c = g_malloc0(sizeof(*c)); 72 c->number = chassis_number; 73 QLIST_INIT(&c->slots); 74 QLIST_INSERT_HEAD(&chassis, c, next); 75 } 76 77 static PCIESlot *pcie_chassis_find_slot_with_chassis(struct PCIEChassis *c, 78 uint8_t slot) 79 { 80 PCIESlot *s; 81 QLIST_FOREACH(s, &c->slots, next) { 82 if (s->slot == slot) { 83 break; 84 } 85 } 86 return s; 87 } 88 89 PCIESlot *pcie_chassis_find_slot(uint8_t chassis_number, uint16_t slot) 90 { 91 struct PCIEChassis *c; 92 c = pcie_chassis_find(chassis_number); 93 if (!c) { 94 return NULL; 95 } 96 return pcie_chassis_find_slot_with_chassis(c, slot); 97 } 98 99 int pcie_chassis_add_slot(struct PCIESlot *slot) 100 { 101 struct PCIEChassis *c; 102 c = pcie_chassis_find(slot->chassis); 103 if (!c) { 104 return -ENODEV; 105 } 106 if (pcie_chassis_find_slot_with_chassis(c, slot->slot)) { 107 return -EBUSY; 108 } 109 QLIST_INSERT_HEAD(&c->slots, slot, next); 110 return 0; 111 } 112 113 void pcie_chassis_del_slot(PCIESlot *s) 114 { 115 QLIST_REMOVE(s, next); 116 } 117