/* * 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 "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 hardwared to 0. */ pci_set_word(d->wmask + PCI_BRIDGE_CONTROL, PCI_BRIDGE_CTL_PARITY | PCI_BRIDGE_CTL_ISA | PCI_BRIDGE_CTL_VGA | PCI_BRIDGE_CTL_SERR | PCI_BRIDGE_CTL_BUS_RESET); /* 7.5.3.5 Prefetchable Memory Base Limit * The Prefetchable Memory Base and Prefetchable Memory Limit registers * must indicate that 64-bit addresses are supported, as defined in * PCI-to-PCI Bridge Architecture Specification, Revision 1.2. */ pci_word_test_and_set_mask(d->config + PCI_PREF_MEMORY_BASE, PCI_PREF_RANGE_TYPE_64); pci_word_test_and_set_mask(d->config + PCI_PREF_MEMORY_LIMIT, PCI_PREF_RANGE_TYPE_64); } /************************************************************************** * (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 = qemu_mallocz(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); }