refer to FWCfgState explicitly
[qemu/cris-port.git] / hw / pci / pcie_port.c
blob91b53a0fc2c903d563a1e62935c80ec68085cb7c
1 /*
2 * pcie_port.c
4 * Copyright (c) 2010 Isaku Yamahata <yamahata at valinux co jp>
5 * VA Linux Systems Japan K.K.
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.
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.
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/>.
21 #include "hw/pci/pcie_port.h"
23 void pcie_port_init_reg(PCIDevice *d)
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);
31 * Unlike conventional pci bridge, for some bits the spec states:
32 * Does not apply to PCI Express and must be hardwired to 0.
34 pci_word_test_and_clear_mask(d->wmask + PCI_BRIDGE_CONTROL,
35 PCI_BRIDGE_CTL_MASTER_ABORT |
36 PCI_BRIDGE_CTL_FAST_BACK |
37 PCI_BRIDGE_CTL_DISCARD |
38 PCI_BRIDGE_CTL_SEC_DISCARD |
39 PCI_BRIDGE_CTL_DISCARD_STATUS |
40 PCI_BRIDGE_CTL_DISCARD_SERR);
43 /**************************************************************************
44 * (chassis number, pcie physical slot number) -> pcie slot conversion
46 struct PCIEChassis {
47 uint8_t number;
49 QLIST_HEAD(, PCIESlot) slots;
50 QLIST_ENTRY(PCIEChassis) next;
53 static QLIST_HEAD(, PCIEChassis) chassis = QLIST_HEAD_INITIALIZER(chassis);
55 static struct PCIEChassis *pcie_chassis_find(uint8_t chassis_number)
57 struct PCIEChassis *c;
58 QLIST_FOREACH(c, &chassis, next) {
59 if (c->number == chassis_number) {
60 break;
63 return c;
66 void pcie_chassis_create(uint8_t chassis_number)
68 struct PCIEChassis *c;
69 c = pcie_chassis_find(chassis_number);
70 if (c) {
71 return;
73 c = g_malloc0(sizeof(*c));
74 c->number = chassis_number;
75 QLIST_INIT(&c->slots);
76 QLIST_INSERT_HEAD(&chassis, c, next);
79 static PCIESlot *pcie_chassis_find_slot_with_chassis(struct PCIEChassis *c,
80 uint8_t slot)
82 PCIESlot *s;
83 QLIST_FOREACH(s, &c->slots, next) {
84 if (s->slot == slot) {
85 break;
88 return s;
91 PCIESlot *pcie_chassis_find_slot(uint8_t chassis_number, uint16_t slot)
93 struct PCIEChassis *c;
94 c = pcie_chassis_find(chassis_number);
95 if (!c) {
96 return NULL;
98 return pcie_chassis_find_slot_with_chassis(c, slot);
101 int pcie_chassis_add_slot(struct PCIESlot *slot)
103 struct PCIEChassis *c;
104 c = pcie_chassis_find(slot->chassis);
105 if (!c) {
106 return -ENODEV;
108 if (pcie_chassis_find_slot_with_chassis(c, slot->slot)) {
109 return -EBUSY;
111 QLIST_INSERT_HEAD(&c->slots, slot, next);
112 return 0;
115 void pcie_chassis_del_slot(PCIESlot *s)
117 QLIST_REMOVE(s, next);