hw/pcie_port.c

   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 "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     /* 7.5.3.5 Prefetchable Memory Base Limit
  31      * The Prefetchable Memory Base and Prefetchable Memory Limit registers
  32      * must indicate that 64-bit addresses are supported, as defined in
  33      * PCI-to-PCI Bridge Architecture Specification, Revision 1.2.
  34      */
  35     pci_word_test_and_set_mask(d->config + PCI_PREF_MEMORY_BASE,
  36                                PCI_PREF_RANGE_TYPE_64);
  37     pci_word_test_and_set_mask(d->config + PCI_PREF_MEMORY_LIMIT,
  38                                PCI_PREF_RANGE_TYPE_64);
  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 = qemu_mallocz(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 }