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/*
* pcie_port.c
*
* Copyright (c) 2010 Isaku Yamahata <yamahata at valinux co jp>
* VA Linux Systems Japan K.K.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#include "hw/pci/pcie_port.h"
void pcie_port_init_reg(PCIDevice *d)
{
/* Unlike pci bridge,
66MHz and fast back to back don't apply to pci express port. */
pci_set_word(d->config + PCI_STATUS, 0);
pci_set_word(d->config + PCI_SEC_STATUS, 0);
/* Unlike conventional pci bridge, some bits are hardwired to 0. */
#define PCI_BRIDGE_CTL_VGA_16BIT 0x10 /* VGA 16-bit decode */
pci_set_word(d->wmask + PCI_BRIDGE_CONTROL,
PCI_BRIDGE_CTL_PARITY |
PCI_BRIDGE_CTL_ISA |
PCI_BRIDGE_CTL_VGA |
PCI_BRIDGE_CTL_VGA_16BIT | /* Req, but no alias support yet */
PCI_BRIDGE_CTL_SERR |
PCI_BRIDGE_CTL_BUS_RESET);
}
/**************************************************************************
* (chassis number, pcie physical slot number) -> pcie slot conversion
*/
struct PCIEChassis {
uint8_t number;
QLIST_HEAD(, PCIESlot) slots;
QLIST_ENTRY(PCIEChassis) next;
};
static QLIST_HEAD(, PCIEChassis) chassis = QLIST_HEAD_INITIALIZER(chassis);
static struct PCIEChassis *pcie_chassis_find(uint8_t chassis_number)
{
struct PCIEChassis *c;
QLIST_FOREACH(c, &chassis, next) {
if (c->number == chassis_number) {
break;
}
}
return c;
}
void pcie_chassis_create(uint8_t chassis_number)
{
struct PCIEChassis *c;
c = pcie_chassis_find(chassis_number);
if (c) {
return;
}
c = g_malloc0(sizeof(*c));
c->number = chassis_number;
QLIST_INIT(&c->slots);
QLIST_INSERT_HEAD(&chassis, c, next);
}
static PCIESlot *pcie_chassis_find_slot_with_chassis(struct PCIEChassis *c,
uint8_t slot)
{
PCIESlot *s;
QLIST_FOREACH(s, &c->slots, next) {
if (s->slot == slot) {
break;
}
}
return s;
}
PCIESlot *pcie_chassis_find_slot(uint8_t chassis_number, uint16_t slot)
{
struct PCIEChassis *c;
c = pcie_chassis_find(chassis_number);
if (!c) {
return NULL;
}
return pcie_chassis_find_slot_with_chassis(c, slot);
}
int pcie_chassis_add_slot(struct PCIESlot *slot)
{
struct PCIEChassis *c;
c = pcie_chassis_find(slot->chassis);
if (!c) {
return -ENODEV;
}
if (pcie_chassis_find_slot_with_chassis(c, slot->slot)) {
return -EBUSY;
}
QLIST_INSERT_HEAD(&c->slots, slot, next);
return 0;
}
void pcie_chassis_del_slot(PCIESlot *s)
{
QLIST_REMOVE(s, next);
}
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