LXR qemu/hw/pci/pcie

   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
  23void 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 */
  42struct PCIEChassis {
  43    uint8_t     number;
  44
  45    QLIST_HEAD(, PCIESlot) slots;
  46    QLIST_ENTRY(PCIEChassis) next;
  47};
  48
  49static QLIST_HEAD(, PCIEChassis) chassis = QLIST_HEAD_INITIALIZER(chassis);
  50
  51static 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
  62void 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
  75static 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
  87PCIESlot *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
  97int 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
 111void pcie_chassis_del_slot(PCIESlot *s)
 112{
 113    QLIST_REMOVE(s, next);
 114}
 115