| /* |
| * 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, for some bits the spec states: |
| * Does not apply to PCI Express and must be hardwired to 0. |
| */ |
| pci_word_test_and_clear_mask(d->wmask + PCI_BRIDGE_CONTROL, |
| PCI_BRIDGE_CTL_MASTER_ABORT | |
| PCI_BRIDGE_CTL_FAST_BACK | |
| PCI_BRIDGE_CTL_DISCARD | |
| PCI_BRIDGE_CTL_SEC_DISCARD | |
| PCI_BRIDGE_CTL_DISCARD_STATUS | |
| PCI_BRIDGE_CTL_DISCARD_SERR); |
| } |
| |
| /************************************************************************** |
| * (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); |
| } |