root / hw / pci.c @ 2b8b3bb9
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/*
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* QEMU PCI bus manager
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*
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* Copyright (c) 2004 Fabrice Bellard
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include "hw.h" |
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#include "pci.h" |
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#include "pci_bridge.h" |
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#include "pci_internals.h" |
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#include "monitor.h" |
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#include "net.h" |
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#include "sysemu.h" |
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#include "loader.h" |
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#include "qemu-objects.h" |
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#include "range.h" |
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//#define DEBUG_PCI
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#ifdef DEBUG_PCI
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# define PCI_DPRINTF(format, ...) printf(format, ## __VA_ARGS__) |
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#else
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# define PCI_DPRINTF(format, ...) do { } while (0) |
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#endif
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static void pcibus_dev_print(Monitor *mon, DeviceState *dev, int indent); |
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static char *pcibus_get_dev_path(DeviceState *dev); |
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static char *pcibus_get_fw_dev_path(DeviceState *dev); |
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static int pcibus_reset(BusState *qbus); |
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struct BusInfo pci_bus_info = {
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.name = "PCI",
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.size = sizeof(PCIBus),
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.print_dev = pcibus_dev_print, |
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.get_dev_path = pcibus_get_dev_path, |
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.get_fw_dev_path = pcibus_get_fw_dev_path, |
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.reset = pcibus_reset, |
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.props = (Property[]) { |
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DEFINE_PROP_PCI_DEVFN("addr", PCIDevice, devfn, -1), |
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DEFINE_PROP_STRING("romfile", PCIDevice, romfile),
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DEFINE_PROP_UINT32("rombar", PCIDevice, rom_bar, 1), |
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DEFINE_PROP_BIT("multifunction", PCIDevice, cap_present,
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QEMU_PCI_CAP_MULTIFUNCTION_BITNR, false),
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DEFINE_PROP_BIT("command_serr_enable", PCIDevice, cap_present,
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QEMU_PCI_CAP_SERR_BITNR, true),
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DEFINE_PROP_END_OF_LIST() |
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} |
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}; |
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static void pci_update_mappings(PCIDevice *d); |
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static void pci_set_irq(void *opaque, int irq_num, int level); |
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static int pci_add_option_rom(PCIDevice *pdev, bool is_default_rom); |
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static void pci_del_option_rom(PCIDevice *pdev); |
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static uint16_t pci_default_sub_vendor_id = PCI_SUBVENDOR_ID_REDHAT_QUMRANET;
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static uint16_t pci_default_sub_device_id = PCI_SUBDEVICE_ID_QEMU;
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struct PCIHostBus {
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int domain;
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struct PCIBus *bus;
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QLIST_ENTRY(PCIHostBus) next; |
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}; |
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static QLIST_HEAD(, PCIHostBus) host_buses;
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static const VMStateDescription vmstate_pcibus = { |
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.name = "PCIBUS",
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.version_id = 1,
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.minimum_version_id = 1,
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.minimum_version_id_old = 1,
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.fields = (VMStateField []) { |
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VMSTATE_INT32_EQUAL(nirq, PCIBus), |
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VMSTATE_VARRAY_INT32(irq_count, PCIBus, nirq, 0, vmstate_info_int32, int32_t),
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VMSTATE_END_OF_LIST() |
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} |
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}; |
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static int pci_bar(PCIDevice *d, int reg) |
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{ |
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uint8_t type; |
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if (reg != PCI_ROM_SLOT)
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return PCI_BASE_ADDRESS_0 + reg * 4; |
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type = d->config[PCI_HEADER_TYPE] & ~PCI_HEADER_TYPE_MULTI_FUNCTION; |
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return type == PCI_HEADER_TYPE_BRIDGE ? PCI_ROM_ADDRESS1 : PCI_ROM_ADDRESS;
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} |
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static inline int pci_irq_state(PCIDevice *d, int irq_num) |
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{ |
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return (d->irq_state >> irq_num) & 0x1; |
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} |
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static inline void pci_set_irq_state(PCIDevice *d, int irq_num, int level) |
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{ |
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d->irq_state &= ~(0x1 << irq_num);
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d->irq_state |= level << irq_num; |
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} |
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static void pci_change_irq_level(PCIDevice *pci_dev, int irq_num, int change) |
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{ |
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PCIBus *bus; |
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for (;;) {
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bus = pci_dev->bus; |
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irq_num = bus->map_irq(pci_dev, irq_num); |
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if (bus->set_irq)
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break;
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pci_dev = bus->parent_dev; |
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} |
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bus->irq_count[irq_num] += change; |
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bus->set_irq(bus->irq_opaque, irq_num, bus->irq_count[irq_num] != 0);
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} |
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int pci_bus_get_irq_level(PCIBus *bus, int irq_num) |
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{ |
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assert(irq_num >= 0);
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assert(irq_num < bus->nirq); |
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return !!bus->irq_count[irq_num];
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} |
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/* Update interrupt status bit in config space on interrupt
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* state change. */
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static void pci_update_irq_status(PCIDevice *dev) |
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{ |
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if (dev->irq_state) {
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dev->config[PCI_STATUS] |= PCI_STATUS_INTERRUPT; |
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} else {
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dev->config[PCI_STATUS] &= ~PCI_STATUS_INTERRUPT; |
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} |
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} |
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void pci_device_deassert_intx(PCIDevice *dev)
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{ |
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int i;
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for (i = 0; i < PCI_NUM_PINS; ++i) { |
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qemu_set_irq(dev->irq[i], 0);
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} |
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} |
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/*
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* This function is called on #RST and FLR.
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* FLR if PCI_EXP_DEVCTL_BCR_FLR is set
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*/
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void pci_device_reset(PCIDevice *dev)
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{ |
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int r;
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/* TODO: call the below unconditionally once all pci devices
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* are qdevified */
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if (dev->qdev.info) {
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qdev_reset_all(&dev->qdev); |
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} |
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dev->irq_state = 0;
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pci_update_irq_status(dev); |
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pci_device_deassert_intx(dev); |
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/* Clear all writable bits */
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pci_word_test_and_clear_mask(dev->config + PCI_COMMAND, |
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pci_get_word(dev->wmask + PCI_COMMAND) | |
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pci_get_word(dev->w1cmask + PCI_COMMAND)); |
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pci_word_test_and_clear_mask(dev->config + PCI_STATUS, |
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pci_get_word(dev->wmask + PCI_STATUS) | |
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pci_get_word(dev->w1cmask + PCI_STATUS)); |
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dev->config[PCI_CACHE_LINE_SIZE] = 0x0;
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dev->config[PCI_INTERRUPT_LINE] = 0x0;
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for (r = 0; r < PCI_NUM_REGIONS; ++r) { |
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PCIIORegion *region = &dev->io_regions[r]; |
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if (!region->size) {
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continue;
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} |
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if (!(region->type & PCI_BASE_ADDRESS_SPACE_IO) &&
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region->type & PCI_BASE_ADDRESS_MEM_TYPE_64) { |
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pci_set_quad(dev->config + pci_bar(dev, r), region->type); |
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} else {
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pci_set_long(dev->config + pci_bar(dev, r), region->type); |
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} |
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} |
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pci_update_mappings(dev); |
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} |
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/*
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* Trigger pci bus reset under a given bus.
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* To be called on RST# assert.
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*/
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void pci_bus_reset(PCIBus *bus)
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{ |
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int i;
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for (i = 0; i < bus->nirq; i++) { |
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bus->irq_count[i] = 0;
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} |
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for (i = 0; i < ARRAY_SIZE(bus->devices); ++i) { |
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if (bus->devices[i]) {
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pci_device_reset(bus->devices[i]); |
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} |
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} |
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} |
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static int pcibus_reset(BusState *qbus) |
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{ |
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pci_bus_reset(DO_UPCAST(PCIBus, qbus, qbus)); |
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/* topology traverse is done by pci_bus_reset().
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Tell qbus/qdev walker not to traverse the tree */
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return 1; |
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} |
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static void pci_host_bus_register(int domain, PCIBus *bus) |
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{ |
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struct PCIHostBus *host;
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host = qemu_mallocz(sizeof(*host));
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host->domain = domain; |
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host->bus = bus; |
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QLIST_INSERT_HEAD(&host_buses, host, next); |
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} |
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PCIBus *pci_find_root_bus(int domain)
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{ |
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struct PCIHostBus *host;
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QLIST_FOREACH(host, &host_buses, next) { |
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if (host->domain == domain) {
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return host->bus;
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} |
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} |
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return NULL; |
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} |
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int pci_find_domain(const PCIBus *bus) |
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{ |
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PCIDevice *d; |
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struct PCIHostBus *host;
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/* obtain root bus */
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while ((d = bus->parent_dev) != NULL) { |
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bus = d->bus; |
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} |
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QLIST_FOREACH(host, &host_buses, next) { |
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if (host->bus == bus) {
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return host->domain;
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} |
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} |
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abort(); /* should not be reached */
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return -1; |
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} |
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void pci_bus_new_inplace(PCIBus *bus, DeviceState *parent,
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const char *name, uint8_t devfn_min) |
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{ |
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qbus_create_inplace(&bus->qbus, &pci_bus_info, parent, name); |
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assert(PCI_FUNC(devfn_min) == 0);
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bus->devfn_min = devfn_min; |
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/* host bridge */
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QLIST_INIT(&bus->child); |
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pci_host_bus_register(0, bus); /* for now only pci domain 0 is supported */ |
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vmstate_register(NULL, -1, &vmstate_pcibus, bus); |
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} |
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PCIBus *pci_bus_new(DeviceState *parent, const char *name, uint8_t devfn_min) |
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{ |
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PCIBus *bus; |
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bus = qemu_mallocz(sizeof(*bus));
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bus->qbus.qdev_allocated = 1;
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pci_bus_new_inplace(bus, parent, name, devfn_min); |
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return bus;
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} |
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void pci_bus_irqs(PCIBus *bus, pci_set_irq_fn set_irq, pci_map_irq_fn map_irq,
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void *irq_opaque, int nirq) |
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{ |
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bus->set_irq = set_irq; |
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bus->map_irq = map_irq; |
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bus->irq_opaque = irq_opaque; |
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bus->nirq = nirq; |
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bus->irq_count = qemu_mallocz(nirq * sizeof(bus->irq_count[0])); |
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} |
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void pci_bus_hotplug(PCIBus *bus, pci_hotplug_fn hotplug, DeviceState *qdev)
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{ |
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bus->qbus.allow_hotplug = 1;
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bus->hotplug = hotplug; |
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bus->hotplug_qdev = qdev; |
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} |
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void pci_bus_set_mem_base(PCIBus *bus, target_phys_addr_t base)
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{ |
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bus->mem_base = base; |
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} |
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PCIBus *pci_register_bus(DeviceState *parent, const char *name, |
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pci_set_irq_fn set_irq, pci_map_irq_fn map_irq, |
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void *irq_opaque, uint8_t devfn_min, int nirq) |
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{ |
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PCIBus *bus; |
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bus = pci_bus_new(parent, name, devfn_min); |
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pci_bus_irqs(bus, set_irq, map_irq, irq_opaque, nirq); |
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return bus;
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} |
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int pci_bus_num(PCIBus *s)
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{ |
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if (!s->parent_dev)
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return 0; /* pci host bridge */ |
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return s->parent_dev->config[PCI_SECONDARY_BUS];
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} |
328 |
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static int get_pci_config_device(QEMUFile *f, void *pv, size_t size) |
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{ |
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PCIDevice *s = container_of(pv, PCIDevice, config); |
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uint8_t *config; |
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int i;
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assert(size == pci_config_size(s)); |
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config = qemu_malloc(size); |
337 |
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qemu_get_buffer(f, config, size); |
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for (i = 0; i < size; ++i) { |
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if ((config[i] ^ s->config[i]) &
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s->cmask[i] & ~s->wmask[i] & ~s->w1cmask[i]) { |
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qemu_free(config); |
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return -EINVAL;
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} |
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} |
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memcpy(s->config, config, size); |
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pci_update_mappings(s); |
349 |
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qemu_free(config); |
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return 0; |
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} |
353 |
|
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/* just put buffer */
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static void put_pci_config_device(QEMUFile *f, void *pv, size_t size) |
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{ |
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const uint8_t **v = pv;
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assert(size == pci_config_size(container_of(pv, PCIDevice, config))); |
359 |
qemu_put_buffer(f, *v, size); |
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} |
361 |
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static VMStateInfo vmstate_info_pci_config = {
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.name = "pci config",
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.get = get_pci_config_device, |
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.put = put_pci_config_device, |
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}; |
367 |
|
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static int get_pci_irq_state(QEMUFile *f, void *pv, size_t size) |
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{ |
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PCIDevice *s = container_of(pv, PCIDevice, irq_state); |
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uint32_t irq_state[PCI_NUM_PINS]; |
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int i;
|
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for (i = 0; i < PCI_NUM_PINS; ++i) { |
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irq_state[i] = qemu_get_be32(f); |
375 |
if (irq_state[i] != 0x1 && irq_state[i] != 0) { |
376 |
fprintf(stderr, "irq state %d: must be 0 or 1.\n",
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irq_state[i]); |
378 |
return -EINVAL;
|
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} |
380 |
} |
381 |
|
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for (i = 0; i < PCI_NUM_PINS; ++i) { |
383 |
pci_set_irq_state(s, i, irq_state[i]); |
384 |
} |
385 |
|
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return 0; |
387 |
} |
388 |
|
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static void put_pci_irq_state(QEMUFile *f, void *pv, size_t size) |
390 |
{ |
391 |
int i;
|
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PCIDevice *s = container_of(pv, PCIDevice, irq_state); |
393 |
|
394 |
for (i = 0; i < PCI_NUM_PINS; ++i) { |
395 |
qemu_put_be32(f, pci_irq_state(s, i)); |
396 |
} |
397 |
} |
398 |
|
399 |
static VMStateInfo vmstate_info_pci_irq_state = {
|
400 |
.name = "pci irq state",
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.get = get_pci_irq_state, |
402 |
.put = put_pci_irq_state, |
403 |
}; |
404 |
|
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const VMStateDescription vmstate_pci_device = {
|
406 |
.name = "PCIDevice",
|
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.version_id = 2,
|
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.minimum_version_id = 1,
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.minimum_version_id_old = 1,
|
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.fields = (VMStateField []) { |
411 |
VMSTATE_INT32_LE(version_id, PCIDevice), |
412 |
VMSTATE_BUFFER_UNSAFE_INFO(config, PCIDevice, 0,
|
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vmstate_info_pci_config, |
414 |
PCI_CONFIG_SPACE_SIZE), |
415 |
VMSTATE_BUFFER_UNSAFE_INFO(irq_state, PCIDevice, 2,
|
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vmstate_info_pci_irq_state, |
417 |
PCI_NUM_PINS * sizeof(int32_t)),
|
418 |
VMSTATE_END_OF_LIST() |
419 |
} |
420 |
}; |
421 |
|
422 |
const VMStateDescription vmstate_pcie_device = {
|
423 |
.name = "PCIDevice",
|
424 |
.version_id = 2,
|
425 |
.minimum_version_id = 1,
|
426 |
.minimum_version_id_old = 1,
|
427 |
.fields = (VMStateField []) { |
428 |
VMSTATE_INT32_LE(version_id, PCIDevice), |
429 |
VMSTATE_BUFFER_UNSAFE_INFO(config, PCIDevice, 0,
|
430 |
vmstate_info_pci_config, |
431 |
PCIE_CONFIG_SPACE_SIZE), |
432 |
VMSTATE_BUFFER_UNSAFE_INFO(irq_state, PCIDevice, 2,
|
433 |
vmstate_info_pci_irq_state, |
434 |
PCI_NUM_PINS * sizeof(int32_t)),
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VMSTATE_END_OF_LIST() |
436 |
} |
437 |
}; |
438 |
|
439 |
static inline const VMStateDescription *pci_get_vmstate(PCIDevice *s) |
440 |
{ |
441 |
return pci_is_express(s) ? &vmstate_pcie_device : &vmstate_pci_device;
|
442 |
} |
443 |
|
444 |
void pci_device_save(PCIDevice *s, QEMUFile *f)
|
445 |
{ |
446 |
/* Clear interrupt status bit: it is implicit
|
447 |
* in irq_state which we are saving.
|
448 |
* This makes us compatible with old devices
|
449 |
* which never set or clear this bit. */
|
450 |
s->config[PCI_STATUS] &= ~PCI_STATUS_INTERRUPT; |
451 |
vmstate_save_state(f, pci_get_vmstate(s), s); |
452 |
/* Restore the interrupt status bit. */
|
453 |
pci_update_irq_status(s); |
454 |
} |
455 |
|
456 |
int pci_device_load(PCIDevice *s, QEMUFile *f)
|
457 |
{ |
458 |
int ret;
|
459 |
ret = vmstate_load_state(f, pci_get_vmstate(s), s, s->version_id); |
460 |
/* Restore the interrupt status bit. */
|
461 |
pci_update_irq_status(s); |
462 |
return ret;
|
463 |
} |
464 |
|
465 |
static void pci_set_default_subsystem_id(PCIDevice *pci_dev) |
466 |
{ |
467 |
pci_set_word(pci_dev->config + PCI_SUBSYSTEM_VENDOR_ID, |
468 |
pci_default_sub_vendor_id); |
469 |
pci_set_word(pci_dev->config + PCI_SUBSYSTEM_ID, |
470 |
pci_default_sub_device_id); |
471 |
} |
472 |
|
473 |
/*
|
474 |
* Parse [[<domain>:]<bus>:]<slot>, return -1 on error if funcp == NULL
|
475 |
* [[<domain>:]<bus>:]<slot>.<func>, return -1 on error
|
476 |
*/
|
477 |
int pci_parse_devaddr(const char *addr, int *domp, int *busp, |
478 |
unsigned int *slotp, unsigned int *funcp) |
479 |
{ |
480 |
const char *p; |
481 |
char *e;
|
482 |
unsigned long val; |
483 |
unsigned long dom = 0, bus = 0; |
484 |
unsigned int slot = 0; |
485 |
unsigned int func = 0; |
486 |
|
487 |
p = addr; |
488 |
val = strtoul(p, &e, 16);
|
489 |
if (e == p)
|
490 |
return -1; |
491 |
if (*e == ':') { |
492 |
bus = val; |
493 |
p = e + 1;
|
494 |
val = strtoul(p, &e, 16);
|
495 |
if (e == p)
|
496 |
return -1; |
497 |
if (*e == ':') { |
498 |
dom = bus; |
499 |
bus = val; |
500 |
p = e + 1;
|
501 |
val = strtoul(p, &e, 16);
|
502 |
if (e == p)
|
503 |
return -1; |
504 |
} |
505 |
} |
506 |
|
507 |
slot = val; |
508 |
|
509 |
if (funcp != NULL) { |
510 |
if (*e != '.') |
511 |
return -1; |
512 |
|
513 |
p = e + 1;
|
514 |
val = strtoul(p, &e, 16);
|
515 |
if (e == p)
|
516 |
return -1; |
517 |
|
518 |
func = val; |
519 |
} |
520 |
|
521 |
/* if funcp == NULL func is 0 */
|
522 |
if (dom > 0xffff || bus > 0xff || slot > 0x1f || func > 7) |
523 |
return -1; |
524 |
|
525 |
if (*e)
|
526 |
return -1; |
527 |
|
528 |
/* Note: QEMU doesn't implement domains other than 0 */
|
529 |
if (!pci_find_bus(pci_find_root_bus(dom), bus))
|
530 |
return -1; |
531 |
|
532 |
*domp = dom; |
533 |
*busp = bus; |
534 |
*slotp = slot; |
535 |
if (funcp != NULL) |
536 |
*funcp = func; |
537 |
return 0; |
538 |
} |
539 |
|
540 |
int pci_read_devaddr(Monitor *mon, const char *addr, int *domp, int *busp, |
541 |
unsigned *slotp)
|
542 |
{ |
543 |
/* strip legacy tag */
|
544 |
if (!strncmp(addr, "pci_addr=", 9)) { |
545 |
addr += 9;
|
546 |
} |
547 |
if (pci_parse_devaddr(addr, domp, busp, slotp, NULL)) { |
548 |
monitor_printf(mon, "Invalid pci address\n");
|
549 |
return -1; |
550 |
} |
551 |
return 0; |
552 |
} |
553 |
|
554 |
PCIBus *pci_get_bus_devfn(int *devfnp, const char *devaddr) |
555 |
{ |
556 |
int dom, bus;
|
557 |
unsigned slot;
|
558 |
|
559 |
if (!devaddr) {
|
560 |
*devfnp = -1;
|
561 |
return pci_find_bus(pci_find_root_bus(0), 0); |
562 |
} |
563 |
|
564 |
if (pci_parse_devaddr(devaddr, &dom, &bus, &slot, NULL) < 0) { |
565 |
return NULL; |
566 |
} |
567 |
|
568 |
*devfnp = PCI_DEVFN(slot, 0);
|
569 |
return pci_find_bus(pci_find_root_bus(dom), bus);
|
570 |
} |
571 |
|
572 |
static void pci_init_cmask(PCIDevice *dev) |
573 |
{ |
574 |
pci_set_word(dev->cmask + PCI_VENDOR_ID, 0xffff);
|
575 |
pci_set_word(dev->cmask + PCI_DEVICE_ID, 0xffff);
|
576 |
dev->cmask[PCI_STATUS] = PCI_STATUS_CAP_LIST; |
577 |
dev->cmask[PCI_REVISION_ID] = 0xff;
|
578 |
dev->cmask[PCI_CLASS_PROG] = 0xff;
|
579 |
pci_set_word(dev->cmask + PCI_CLASS_DEVICE, 0xffff);
|
580 |
dev->cmask[PCI_HEADER_TYPE] = 0xff;
|
581 |
dev->cmask[PCI_CAPABILITY_LIST] = 0xff;
|
582 |
} |
583 |
|
584 |
static void pci_init_wmask(PCIDevice *dev) |
585 |
{ |
586 |
int config_size = pci_config_size(dev);
|
587 |
|
588 |
dev->wmask[PCI_CACHE_LINE_SIZE] = 0xff;
|
589 |
dev->wmask[PCI_INTERRUPT_LINE] = 0xff;
|
590 |
pci_set_word(dev->wmask + PCI_COMMAND, |
591 |
PCI_COMMAND_IO | PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER | |
592 |
PCI_COMMAND_INTX_DISABLE); |
593 |
if (dev->cap_present & QEMU_PCI_CAP_SERR) {
|
594 |
pci_word_test_and_set_mask(dev->wmask + PCI_COMMAND, PCI_COMMAND_SERR); |
595 |
} |
596 |
|
597 |
memset(dev->wmask + PCI_CONFIG_HEADER_SIZE, 0xff,
|
598 |
config_size - PCI_CONFIG_HEADER_SIZE); |
599 |
} |
600 |
|
601 |
static void pci_init_w1cmask(PCIDevice *dev) |
602 |
{ |
603 |
/*
|
604 |
* Note: It's okay to set w1cmask even for readonly bits as
|
605 |
* long as their value is hardwired to 0.
|
606 |
*/
|
607 |
pci_set_word(dev->w1cmask + PCI_STATUS, |
608 |
PCI_STATUS_PARITY | PCI_STATUS_SIG_TARGET_ABORT | |
609 |
PCI_STATUS_REC_TARGET_ABORT | PCI_STATUS_REC_MASTER_ABORT | |
610 |
PCI_STATUS_SIG_SYSTEM_ERROR | PCI_STATUS_DETECTED_PARITY); |
611 |
} |
612 |
|
613 |
static void pci_init_wmask_bridge(PCIDevice *d) |
614 |
{ |
615 |
/* PCI_PRIMARY_BUS, PCI_SECONDARY_BUS, PCI_SUBORDINATE_BUS and
|
616 |
PCI_SEC_LETENCY_TIMER */
|
617 |
memset(d->wmask + PCI_PRIMARY_BUS, 0xff, 4); |
618 |
|
619 |
/* base and limit */
|
620 |
d->wmask[PCI_IO_BASE] = PCI_IO_RANGE_MASK & 0xff;
|
621 |
d->wmask[PCI_IO_LIMIT] = PCI_IO_RANGE_MASK & 0xff;
|
622 |
pci_set_word(d->wmask + PCI_MEMORY_BASE, |
623 |
PCI_MEMORY_RANGE_MASK & 0xffff);
|
624 |
pci_set_word(d->wmask + PCI_MEMORY_LIMIT, |
625 |
PCI_MEMORY_RANGE_MASK & 0xffff);
|
626 |
pci_set_word(d->wmask + PCI_PREF_MEMORY_BASE, |
627 |
PCI_PREF_RANGE_MASK & 0xffff);
|
628 |
pci_set_word(d->wmask + PCI_PREF_MEMORY_LIMIT, |
629 |
PCI_PREF_RANGE_MASK & 0xffff);
|
630 |
|
631 |
/* PCI_PREF_BASE_UPPER32 and PCI_PREF_LIMIT_UPPER32 */
|
632 |
memset(d->wmask + PCI_PREF_BASE_UPPER32, 0xff, 8); |
633 |
|
634 |
/* TODO: add this define to pci_regs.h in linux and then in qemu. */
|
635 |
#define PCI_BRIDGE_CTL_VGA_16BIT 0x10 /* VGA 16-bit decode */ |
636 |
#define PCI_BRIDGE_CTL_DISCARD 0x100 /* Primary discard timer */ |
637 |
#define PCI_BRIDGE_CTL_SEC_DISCARD 0x200 /* Secondary discard timer */ |
638 |
#define PCI_BRIDGE_CTL_DISCARD_STATUS 0x400 /* Discard timer status */ |
639 |
#define PCI_BRIDGE_CTL_DISCARD_SERR 0x800 /* Discard timer SERR# enable */ |
640 |
pci_set_word(d->wmask + PCI_BRIDGE_CONTROL, |
641 |
PCI_BRIDGE_CTL_PARITY | |
642 |
PCI_BRIDGE_CTL_SERR | |
643 |
PCI_BRIDGE_CTL_ISA | |
644 |
PCI_BRIDGE_CTL_VGA | |
645 |
PCI_BRIDGE_CTL_VGA_16BIT | |
646 |
PCI_BRIDGE_CTL_MASTER_ABORT | |
647 |
PCI_BRIDGE_CTL_BUS_RESET | |
648 |
PCI_BRIDGE_CTL_FAST_BACK | |
649 |
PCI_BRIDGE_CTL_DISCARD | |
650 |
PCI_BRIDGE_CTL_SEC_DISCARD | |
651 |
PCI_BRIDGE_CTL_DISCARD_SERR); |
652 |
/* Below does not do anything as we never set this bit, put here for
|
653 |
* completeness. */
|
654 |
pci_set_word(d->w1cmask + PCI_BRIDGE_CONTROL, |
655 |
PCI_BRIDGE_CTL_DISCARD_STATUS); |
656 |
} |
657 |
|
658 |
static int pci_init_multifunction(PCIBus *bus, PCIDevice *dev) |
659 |
{ |
660 |
uint8_t slot = PCI_SLOT(dev->devfn); |
661 |
uint8_t func; |
662 |
|
663 |
if (dev->cap_present & QEMU_PCI_CAP_MULTIFUNCTION) {
|
664 |
dev->config[PCI_HEADER_TYPE] |= PCI_HEADER_TYPE_MULTI_FUNCTION; |
665 |
} |
666 |
|
667 |
/*
|
668 |
* multifunction bit is interpreted in two ways as follows.
|
669 |
* - all functions must set the bit to 1.
|
670 |
* Example: Intel X53
|
671 |
* - function 0 must set the bit, but the rest function (> 0)
|
672 |
* is allowed to leave the bit to 0.
|
673 |
* Example: PIIX3(also in qemu), PIIX4(also in qemu), ICH10,
|
674 |
*
|
675 |
* So OS (at least Linux) checks the bit of only function 0,
|
676 |
* and doesn't see the bit of function > 0.
|
677 |
*
|
678 |
* The below check allows both interpretation.
|
679 |
*/
|
680 |
if (PCI_FUNC(dev->devfn)) {
|
681 |
PCIDevice *f0 = bus->devices[PCI_DEVFN(slot, 0)];
|
682 |
if (f0 && !(f0->cap_present & QEMU_PCI_CAP_MULTIFUNCTION)) {
|
683 |
/* function 0 should set multifunction bit */
|
684 |
error_report("PCI: single function device can't be populated "
|
685 |
"in function %x.%x", slot, PCI_FUNC(dev->devfn));
|
686 |
return -1; |
687 |
} |
688 |
return 0; |
689 |
} |
690 |
|
691 |
if (dev->cap_present & QEMU_PCI_CAP_MULTIFUNCTION) {
|
692 |
return 0; |
693 |
} |
694 |
/* function 0 indicates single function, so function > 0 must be NULL */
|
695 |
for (func = 1; func < PCI_FUNC_MAX; ++func) { |
696 |
if (bus->devices[PCI_DEVFN(slot, func)]) {
|
697 |
error_report("PCI: %x.0 indicates single function, "
|
698 |
"but %x.%x is already populated.",
|
699 |
slot, slot, func); |
700 |
return -1; |
701 |
} |
702 |
} |
703 |
return 0; |
704 |
} |
705 |
|
706 |
static void pci_config_alloc(PCIDevice *pci_dev) |
707 |
{ |
708 |
int config_size = pci_config_size(pci_dev);
|
709 |
|
710 |
pci_dev->config = qemu_mallocz(config_size); |
711 |
pci_dev->cmask = qemu_mallocz(config_size); |
712 |
pci_dev->wmask = qemu_mallocz(config_size); |
713 |
pci_dev->w1cmask = qemu_mallocz(config_size); |
714 |
pci_dev->used = qemu_mallocz(config_size); |
715 |
} |
716 |
|
717 |
static void pci_config_free(PCIDevice *pci_dev) |
718 |
{ |
719 |
qemu_free(pci_dev->config); |
720 |
qemu_free(pci_dev->cmask); |
721 |
qemu_free(pci_dev->wmask); |
722 |
qemu_free(pci_dev->w1cmask); |
723 |
qemu_free(pci_dev->used); |
724 |
} |
725 |
|
726 |
/* -1 for devfn means auto assign */
|
727 |
static PCIDevice *do_pci_register_device(PCIDevice *pci_dev, PCIBus *bus,
|
728 |
const char *name, int devfn, |
729 |
PCIConfigReadFunc *config_read, |
730 |
PCIConfigWriteFunc *config_write, |
731 |
bool is_bridge)
|
732 |
{ |
733 |
if (devfn < 0) { |
734 |
for(devfn = bus->devfn_min ; devfn < ARRAY_SIZE(bus->devices);
|
735 |
devfn += PCI_FUNC_MAX) { |
736 |
if (!bus->devices[devfn])
|
737 |
goto found;
|
738 |
} |
739 |
error_report("PCI: no slot/function available for %s, all in use", name);
|
740 |
return NULL; |
741 |
found: ;
|
742 |
} else if (bus->devices[devfn]) { |
743 |
error_report("PCI: slot %d function %d not available for %s, in use by %s",
|
744 |
PCI_SLOT(devfn), PCI_FUNC(devfn), name, bus->devices[devfn]->name); |
745 |
return NULL; |
746 |
} |
747 |
pci_dev->bus = bus; |
748 |
pci_dev->devfn = devfn; |
749 |
pstrcpy(pci_dev->name, sizeof(pci_dev->name), name);
|
750 |
pci_dev->irq_state = 0;
|
751 |
pci_config_alloc(pci_dev); |
752 |
|
753 |
if (!is_bridge) {
|
754 |
pci_set_default_subsystem_id(pci_dev); |
755 |
} |
756 |
pci_init_cmask(pci_dev); |
757 |
pci_init_wmask(pci_dev); |
758 |
pci_init_w1cmask(pci_dev); |
759 |
if (is_bridge) {
|
760 |
pci_init_wmask_bridge(pci_dev); |
761 |
} |
762 |
if (pci_init_multifunction(bus, pci_dev)) {
|
763 |
pci_config_free(pci_dev); |
764 |
return NULL; |
765 |
} |
766 |
|
767 |
if (!config_read)
|
768 |
config_read = pci_default_read_config; |
769 |
if (!config_write)
|
770 |
config_write = pci_default_write_config; |
771 |
pci_dev->config_read = config_read; |
772 |
pci_dev->config_write = config_write; |
773 |
bus->devices[devfn] = pci_dev; |
774 |
pci_dev->irq = qemu_allocate_irqs(pci_set_irq, pci_dev, PCI_NUM_PINS); |
775 |
pci_dev->version_id = 2; /* Current pci device vmstate version */ |
776 |
return pci_dev;
|
777 |
} |
778 |
|
779 |
static void do_pci_unregister_device(PCIDevice *pci_dev) |
780 |
{ |
781 |
qemu_free_irqs(pci_dev->irq); |
782 |
pci_dev->bus->devices[pci_dev->devfn] = NULL;
|
783 |
pci_config_free(pci_dev); |
784 |
} |
785 |
|
786 |
PCIDevice *pci_register_device(PCIBus *bus, const char *name, |
787 |
int instance_size, int devfn, |
788 |
PCIConfigReadFunc *config_read, |
789 |
PCIConfigWriteFunc *config_write) |
790 |
{ |
791 |
PCIDevice *pci_dev; |
792 |
|
793 |
pci_dev = qemu_mallocz(instance_size); |
794 |
pci_dev = do_pci_register_device(pci_dev, bus, name, devfn, |
795 |
config_read, config_write, |
796 |
PCI_HEADER_TYPE_NORMAL); |
797 |
if (pci_dev == NULL) { |
798 |
hw_error("PCI: can't register device\n");
|
799 |
} |
800 |
return pci_dev;
|
801 |
} |
802 |
|
803 |
static target_phys_addr_t pci_to_cpu_addr(PCIBus *bus,
|
804 |
target_phys_addr_t addr) |
805 |
{ |
806 |
return addr + bus->mem_base;
|
807 |
} |
808 |
|
809 |
static void pci_unregister_io_regions(PCIDevice *pci_dev) |
810 |
{ |
811 |
PCIIORegion *r; |
812 |
int i;
|
813 |
|
814 |
for(i = 0; i < PCI_NUM_REGIONS; i++) { |
815 |
r = &pci_dev->io_regions[i]; |
816 |
if (!r->size || r->addr == PCI_BAR_UNMAPPED)
|
817 |
continue;
|
818 |
if (r->type == PCI_BASE_ADDRESS_SPACE_IO) {
|
819 |
isa_unassign_ioport(r->addr, r->filtered_size); |
820 |
} else {
|
821 |
cpu_register_physical_memory(pci_to_cpu_addr(pci_dev->bus, |
822 |
r->addr), |
823 |
r->filtered_size, |
824 |
IO_MEM_UNASSIGNED); |
825 |
} |
826 |
} |
827 |
} |
828 |
|
829 |
static int pci_unregister_device(DeviceState *dev) |
830 |
{ |
831 |
PCIDevice *pci_dev = DO_UPCAST(PCIDevice, qdev, dev); |
832 |
PCIDeviceInfo *info = DO_UPCAST(PCIDeviceInfo, qdev, dev->info); |
833 |
int ret = 0; |
834 |
|
835 |
if (info->exit)
|
836 |
ret = info->exit(pci_dev); |
837 |
if (ret)
|
838 |
return ret;
|
839 |
|
840 |
pci_unregister_io_regions(pci_dev); |
841 |
pci_del_option_rom(pci_dev); |
842 |
qemu_free(pci_dev->romfile); |
843 |
do_pci_unregister_device(pci_dev); |
844 |
return 0; |
845 |
} |
846 |
|
847 |
void pci_register_bar(PCIDevice *pci_dev, int region_num, |
848 |
pcibus_t size, uint8_t type, |
849 |
PCIMapIORegionFunc *map_func) |
850 |
{ |
851 |
PCIIORegion *r; |
852 |
uint32_t addr; |
853 |
uint64_t wmask; |
854 |
|
855 |
assert(region_num >= 0);
|
856 |
assert(region_num < PCI_NUM_REGIONS); |
857 |
if (size & (size-1)) { |
858 |
fprintf(stderr, "ERROR: PCI region size must be pow2 "
|
859 |
"type=0x%x, size=0x%"FMT_PCIBUS"\n", type, size); |
860 |
exit(1);
|
861 |
} |
862 |
|
863 |
r = &pci_dev->io_regions[region_num]; |
864 |
r->addr = PCI_BAR_UNMAPPED; |
865 |
r->size = size; |
866 |
r->filtered_size = size; |
867 |
r->type = type; |
868 |
r->map_func = map_func; |
869 |
r->ram_addr = IO_MEM_UNASSIGNED; |
870 |
|
871 |
wmask = ~(size - 1);
|
872 |
addr = pci_bar(pci_dev, region_num); |
873 |
if (region_num == PCI_ROM_SLOT) {
|
874 |
/* ROM enable bit is writable */
|
875 |
wmask |= PCI_ROM_ADDRESS_ENABLE; |
876 |
} |
877 |
pci_set_long(pci_dev->config + addr, type); |
878 |
if (!(r->type & PCI_BASE_ADDRESS_SPACE_IO) &&
|
879 |
r->type & PCI_BASE_ADDRESS_MEM_TYPE_64) { |
880 |
pci_set_quad(pci_dev->wmask + addr, wmask); |
881 |
pci_set_quad(pci_dev->cmask + addr, ~0ULL);
|
882 |
} else {
|
883 |
pci_set_long(pci_dev->wmask + addr, wmask & 0xffffffff);
|
884 |
pci_set_long(pci_dev->cmask + addr, 0xffffffff);
|
885 |
} |
886 |
} |
887 |
|
888 |
static void pci_simple_bar_mapfunc(PCIDevice *pci_dev, int region_num, |
889 |
pcibus_t addr, pcibus_t size, int type)
|
890 |
{ |
891 |
cpu_register_physical_memory(addr, size, |
892 |
pci_dev->io_regions[region_num].ram_addr); |
893 |
} |
894 |
|
895 |
void pci_register_bar_simple(PCIDevice *pci_dev, int region_num, |
896 |
pcibus_t size, uint8_t attr, ram_addr_t ram_addr) |
897 |
{ |
898 |
pci_register_bar(pci_dev, region_num, size, |
899 |
PCI_BASE_ADDRESS_SPACE_MEMORY | attr, |
900 |
pci_simple_bar_mapfunc); |
901 |
pci_dev->io_regions[region_num].ram_addr = ram_addr; |
902 |
} |
903 |
|
904 |
static void pci_bridge_filter(PCIDevice *d, pcibus_t *addr, pcibus_t *size, |
905 |
uint8_t type) |
906 |
{ |
907 |
pcibus_t base = *addr; |
908 |
pcibus_t limit = *addr + *size - 1;
|
909 |
PCIDevice *br; |
910 |
|
911 |
for (br = d->bus->parent_dev; br; br = br->bus->parent_dev) {
|
912 |
uint16_t cmd = pci_get_word(d->config + PCI_COMMAND); |
913 |
|
914 |
if (type & PCI_BASE_ADDRESS_SPACE_IO) {
|
915 |
if (!(cmd & PCI_COMMAND_IO)) {
|
916 |
goto no_map;
|
917 |
} |
918 |
} else {
|
919 |
if (!(cmd & PCI_COMMAND_MEMORY)) {
|
920 |
goto no_map;
|
921 |
} |
922 |
} |
923 |
|
924 |
base = MAX(base, pci_bridge_get_base(br, type)); |
925 |
limit = MIN(limit, pci_bridge_get_limit(br, type)); |
926 |
} |
927 |
|
928 |
if (base > limit) {
|
929 |
goto no_map;
|
930 |
} |
931 |
*addr = base; |
932 |
*size = limit - base + 1;
|
933 |
return;
|
934 |
no_map:
|
935 |
*addr = PCI_BAR_UNMAPPED; |
936 |
*size = 0;
|
937 |
} |
938 |
|
939 |
static pcibus_t pci_bar_address(PCIDevice *d,
|
940 |
int reg, uint8_t type, pcibus_t size)
|
941 |
{ |
942 |
pcibus_t new_addr, last_addr; |
943 |
int bar = pci_bar(d, reg);
|
944 |
uint16_t cmd = pci_get_word(d->config + PCI_COMMAND); |
945 |
|
946 |
if (type & PCI_BASE_ADDRESS_SPACE_IO) {
|
947 |
if (!(cmd & PCI_COMMAND_IO)) {
|
948 |
return PCI_BAR_UNMAPPED;
|
949 |
} |
950 |
new_addr = pci_get_long(d->config + bar) & ~(size - 1);
|
951 |
last_addr = new_addr + size - 1;
|
952 |
/* NOTE: we have only 64K ioports on PC */
|
953 |
if (last_addr <= new_addr || new_addr == 0 || last_addr > UINT16_MAX) { |
954 |
return PCI_BAR_UNMAPPED;
|
955 |
} |
956 |
return new_addr;
|
957 |
} |
958 |
|
959 |
if (!(cmd & PCI_COMMAND_MEMORY)) {
|
960 |
return PCI_BAR_UNMAPPED;
|
961 |
} |
962 |
if (type & PCI_BASE_ADDRESS_MEM_TYPE_64) {
|
963 |
new_addr = pci_get_quad(d->config + bar); |
964 |
} else {
|
965 |
new_addr = pci_get_long(d->config + bar); |
966 |
} |
967 |
/* the ROM slot has a specific enable bit */
|
968 |
if (reg == PCI_ROM_SLOT && !(new_addr & PCI_ROM_ADDRESS_ENABLE)) {
|
969 |
return PCI_BAR_UNMAPPED;
|
970 |
} |
971 |
new_addr &= ~(size - 1);
|
972 |
last_addr = new_addr + size - 1;
|
973 |
/* NOTE: we do not support wrapping */
|
974 |
/* XXX: as we cannot support really dynamic
|
975 |
mappings, we handle specific values as invalid
|
976 |
mappings. */
|
977 |
if (last_addr <= new_addr || new_addr == 0 || |
978 |
last_addr == PCI_BAR_UNMAPPED) { |
979 |
return PCI_BAR_UNMAPPED;
|
980 |
} |
981 |
|
982 |
/* Now pcibus_t is 64bit.
|
983 |
* Check if 32 bit BAR wraps around explicitly.
|
984 |
* Without this, PC ide doesn't work well.
|
985 |
* TODO: remove this work around.
|
986 |
*/
|
987 |
if (!(type & PCI_BASE_ADDRESS_MEM_TYPE_64) && last_addr >= UINT32_MAX) {
|
988 |
return PCI_BAR_UNMAPPED;
|
989 |
} |
990 |
|
991 |
/*
|
992 |
* OS is allowed to set BAR beyond its addressable
|
993 |
* bits. For example, 32 bit OS can set 64bit bar
|
994 |
* to >4G. Check it. TODO: we might need to support
|
995 |
* it in the future for e.g. PAE.
|
996 |
*/
|
997 |
if (last_addr >= TARGET_PHYS_ADDR_MAX) {
|
998 |
return PCI_BAR_UNMAPPED;
|
999 |
} |
1000 |
|
1001 |
return new_addr;
|
1002 |
} |
1003 |
|
1004 |
static void pci_update_mappings(PCIDevice *d) |
1005 |
{ |
1006 |
PCIIORegion *r; |
1007 |
int i;
|
1008 |
pcibus_t new_addr, filtered_size; |
1009 |
|
1010 |
for(i = 0; i < PCI_NUM_REGIONS; i++) { |
1011 |
r = &d->io_regions[i]; |
1012 |
|
1013 |
/* this region isn't registered */
|
1014 |
if (!r->size)
|
1015 |
continue;
|
1016 |
|
1017 |
new_addr = pci_bar_address(d, i, r->type, r->size); |
1018 |
|
1019 |
/* bridge filtering */
|
1020 |
filtered_size = r->size; |
1021 |
if (new_addr != PCI_BAR_UNMAPPED) {
|
1022 |
pci_bridge_filter(d, &new_addr, &filtered_size, r->type); |
1023 |
} |
1024 |
|
1025 |
/* This bar isn't changed */
|
1026 |
if (new_addr == r->addr && filtered_size == r->filtered_size)
|
1027 |
continue;
|
1028 |
|
1029 |
/* now do the real mapping */
|
1030 |
if (r->addr != PCI_BAR_UNMAPPED) {
|
1031 |
if (r->type & PCI_BASE_ADDRESS_SPACE_IO) {
|
1032 |
int class;
|
1033 |
/* NOTE: specific hack for IDE in PC case:
|
1034 |
only one byte must be mapped. */
|
1035 |
class = pci_get_word(d->config + PCI_CLASS_DEVICE); |
1036 |
if (class == 0x0101 && r->size == 4) { |
1037 |
isa_unassign_ioport(r->addr + 2, 1); |
1038 |
} else {
|
1039 |
isa_unassign_ioport(r->addr, r->filtered_size); |
1040 |
} |
1041 |
} else {
|
1042 |
cpu_register_physical_memory(pci_to_cpu_addr(d->bus, r->addr), |
1043 |
r->filtered_size, |
1044 |
IO_MEM_UNASSIGNED); |
1045 |
qemu_unregister_coalesced_mmio(r->addr, r->filtered_size); |
1046 |
} |
1047 |
} |
1048 |
r->addr = new_addr; |
1049 |
r->filtered_size = filtered_size; |
1050 |
if (r->addr != PCI_BAR_UNMAPPED) {
|
1051 |
/*
|
1052 |
* TODO: currently almost all the map funcions assumes
|
1053 |
* filtered_size == size and addr & ~(size - 1) == addr.
|
1054 |
* However with bridge filtering, they aren't always true.
|
1055 |
* Teach them such cases, such that filtered_size < size and
|
1056 |
* addr & (size - 1) != 0.
|
1057 |
*/
|
1058 |
if (r->type & PCI_BASE_ADDRESS_SPACE_IO) {
|
1059 |
r->map_func(d, i, r->addr, r->filtered_size, r->type); |
1060 |
} else {
|
1061 |
r->map_func(d, i, pci_to_cpu_addr(d->bus, r->addr), |
1062 |
r->filtered_size, r->type); |
1063 |
} |
1064 |
} |
1065 |
} |
1066 |
} |
1067 |
|
1068 |
static inline int pci_irq_disabled(PCIDevice *d) |
1069 |
{ |
1070 |
return pci_get_word(d->config + PCI_COMMAND) & PCI_COMMAND_INTX_DISABLE;
|
1071 |
} |
1072 |
|
1073 |
/* Called after interrupt disabled field update in config space,
|
1074 |
* assert/deassert interrupts if necessary.
|
1075 |
* Gets original interrupt disable bit value (before update). */
|
1076 |
static void pci_update_irq_disabled(PCIDevice *d, int was_irq_disabled) |
1077 |
{ |
1078 |
int i, disabled = pci_irq_disabled(d);
|
1079 |
if (disabled == was_irq_disabled)
|
1080 |
return;
|
1081 |
for (i = 0; i < PCI_NUM_PINS; ++i) { |
1082 |
int state = pci_irq_state(d, i);
|
1083 |
pci_change_irq_level(d, i, disabled ? -state : state); |
1084 |
} |
1085 |
} |
1086 |
|
1087 |
uint32_t pci_default_read_config(PCIDevice *d, |
1088 |
uint32_t address, int len)
|
1089 |
{ |
1090 |
uint32_t val = 0;
|
1091 |
assert(len == 1 || len == 2 || len == 4); |
1092 |
len = MIN(len, pci_config_size(d) - address); |
1093 |
memcpy(&val, d->config + address, len); |
1094 |
return le32_to_cpu(val);
|
1095 |
} |
1096 |
|
1097 |
void pci_default_write_config(PCIDevice *d, uint32_t addr, uint32_t val, int l) |
1098 |
{ |
1099 |
int i, was_irq_disabled = pci_irq_disabled(d);
|
1100 |
uint32_t config_size = pci_config_size(d); |
1101 |
|
1102 |
for (i = 0; i < l && addr + i < config_size; val >>= 8, ++i) { |
1103 |
uint8_t wmask = d->wmask[addr + i]; |
1104 |
uint8_t w1cmask = d->w1cmask[addr + i]; |
1105 |
assert(!(wmask & w1cmask)); |
1106 |
d->config[addr + i] = (d->config[addr + i] & ~wmask) | (val & wmask); |
1107 |
d->config[addr + i] &= ~(val & w1cmask); /* W1C: Write 1 to Clear */
|
1108 |
} |
1109 |
if (ranges_overlap(addr, l, PCI_BASE_ADDRESS_0, 24) || |
1110 |
ranges_overlap(addr, l, PCI_ROM_ADDRESS, 4) ||
|
1111 |
ranges_overlap(addr, l, PCI_ROM_ADDRESS1, 4) ||
|
1112 |
range_covers_byte(addr, l, PCI_COMMAND)) |
1113 |
pci_update_mappings(d); |
1114 |
|
1115 |
if (range_covers_byte(addr, l, PCI_COMMAND))
|
1116 |
pci_update_irq_disabled(d, was_irq_disabled); |
1117 |
} |
1118 |
|
1119 |
/***********************************************************/
|
1120 |
/* generic PCI irq support */
|
1121 |
|
1122 |
/* 0 <= irq_num <= 3. level must be 0 or 1 */
|
1123 |
static void pci_set_irq(void *opaque, int irq_num, int level) |
1124 |
{ |
1125 |
PCIDevice *pci_dev = opaque; |
1126 |
int change;
|
1127 |
|
1128 |
change = level - pci_irq_state(pci_dev, irq_num); |
1129 |
if (!change)
|
1130 |
return;
|
1131 |
|
1132 |
pci_set_irq_state(pci_dev, irq_num, level); |
1133 |
pci_update_irq_status(pci_dev); |
1134 |
if (pci_irq_disabled(pci_dev))
|
1135 |
return;
|
1136 |
pci_change_irq_level(pci_dev, irq_num, change); |
1137 |
} |
1138 |
|
1139 |
/***********************************************************/
|
1140 |
/* monitor info on PCI */
|
1141 |
|
1142 |
typedef struct { |
1143 |
uint16_t class; |
1144 |
const char *desc; |
1145 |
const char *fw_name; |
1146 |
uint16_t fw_ign_bits; |
1147 |
} pci_class_desc; |
1148 |
|
1149 |
static const pci_class_desc pci_class_descriptions[] = |
1150 |
{ |
1151 |
{ 0x0001, "VGA controller", "display"}, |
1152 |
{ 0x0100, "SCSI controller", "scsi"}, |
1153 |
{ 0x0101, "IDE controller", "ide"}, |
1154 |
{ 0x0102, "Floppy controller", "fdc"}, |
1155 |
{ 0x0103, "IPI controller", "ipi"}, |
1156 |
{ 0x0104, "RAID controller", "raid"}, |
1157 |
{ 0x0106, "SATA controller"}, |
1158 |
{ 0x0107, "SAS controller"}, |
1159 |
{ 0x0180, "Storage controller"}, |
1160 |
{ 0x0200, "Ethernet controller", "ethernet"}, |
1161 |
{ 0x0201, "Token Ring controller", "token-ring"}, |
1162 |
{ 0x0202, "FDDI controller", "fddi"}, |
1163 |
{ 0x0203, "ATM controller", "atm"}, |
1164 |
{ 0x0280, "Network controller"}, |
1165 |
{ 0x0300, "VGA controller", "display", 0x00ff}, |
1166 |
{ 0x0301, "XGA controller"}, |
1167 |
{ 0x0302, "3D controller"}, |
1168 |
{ 0x0380, "Display controller"}, |
1169 |
{ 0x0400, "Video controller", "video"}, |
1170 |
{ 0x0401, "Audio controller", "sound"}, |
1171 |
{ 0x0402, "Phone"}, |
1172 |
{ 0x0403, "Audio controller", "sound"}, |
1173 |
{ 0x0480, "Multimedia controller"}, |
1174 |
{ 0x0500, "RAM controller", "memory"}, |
1175 |
{ 0x0501, "Flash controller", "flash"}, |
1176 |
{ 0x0580, "Memory controller"}, |
1177 |
{ 0x0600, "Host bridge", "host"}, |
1178 |
{ 0x0601, "ISA bridge", "isa"}, |
1179 |
{ 0x0602, "EISA bridge", "eisa"}, |
1180 |
{ 0x0603, "MC bridge", "mca"}, |
1181 |
{ 0x0604, "PCI bridge", "pci"}, |
1182 |
{ 0x0605, "PCMCIA bridge", "pcmcia"}, |
1183 |
{ 0x0606, "NUBUS bridge", "nubus"}, |
1184 |
{ 0x0607, "CARDBUS bridge", "cardbus"}, |
1185 |
{ 0x0608, "RACEWAY bridge"}, |
1186 |
{ 0x0680, "Bridge"}, |
1187 |
{ 0x0700, "Serial port", "serial"}, |
1188 |
{ 0x0701, "Parallel port", "parallel"}, |
1189 |
{ 0x0800, "Interrupt controller", "interrupt-controller"}, |
1190 |
{ 0x0801, "DMA controller", "dma-controller"}, |
1191 |
{ 0x0802, "Timer", "timer"}, |
1192 |
{ 0x0803, "RTC", "rtc"}, |
1193 |
{ 0x0900, "Keyboard", "keyboard"}, |
1194 |
{ 0x0901, "Pen", "pen"}, |
1195 |
{ 0x0902, "Mouse", "mouse"}, |
1196 |
{ 0x0A00, "Dock station", "dock", 0x00ff}, |
1197 |
{ 0x0B00, "i386 cpu", "cpu", 0x00ff}, |
1198 |
{ 0x0c00, "Fireware contorller", "fireware"}, |
1199 |
{ 0x0c01, "Access bus controller", "access-bus"}, |
1200 |
{ 0x0c02, "SSA controller", "ssa"}, |
1201 |
{ 0x0c03, "USB controller", "usb"}, |
1202 |
{ 0x0c04, "Fibre channel controller", "fibre-channel"}, |
1203 |
{ 0, NULL} |
1204 |
}; |
1205 |
|
1206 |
static void pci_for_each_device_under_bus(PCIBus *bus, |
1207 |
void (*fn)(PCIBus *b, PCIDevice *d))
|
1208 |
{ |
1209 |
PCIDevice *d; |
1210 |
int devfn;
|
1211 |
|
1212 |
for(devfn = 0; devfn < ARRAY_SIZE(bus->devices); devfn++) { |
1213 |
d = bus->devices[devfn]; |
1214 |
if (d) {
|
1215 |
fn(bus, d); |
1216 |
} |
1217 |
} |
1218 |
} |
1219 |
|
1220 |
void pci_for_each_device(PCIBus *bus, int bus_num, |
1221 |
void (*fn)(PCIBus *b, PCIDevice *d))
|
1222 |
{ |
1223 |
bus = pci_find_bus(bus, bus_num); |
1224 |
|
1225 |
if (bus) {
|
1226 |
pci_for_each_device_under_bus(bus, fn); |
1227 |
} |
1228 |
} |
1229 |
|
1230 |
static void pci_device_print(Monitor *mon, QDict *device) |
1231 |
{ |
1232 |
QDict *qdict; |
1233 |
QListEntry *entry; |
1234 |
uint64_t addr, size; |
1235 |
|
1236 |
monitor_printf(mon, " Bus %2" PRId64 ", ", qdict_get_int(device, "bus")); |
1237 |
monitor_printf(mon, "device %3" PRId64 ", function %" PRId64 ":\n", |
1238 |
qdict_get_int(device, "slot"),
|
1239 |
qdict_get_int(device, "function"));
|
1240 |
monitor_printf(mon, " ");
|
1241 |
|
1242 |
qdict = qdict_get_qdict(device, "class_info");
|
1243 |
if (qdict_haskey(qdict, "desc")) { |
1244 |
monitor_printf(mon, "%s", qdict_get_str(qdict, "desc")); |
1245 |
} else {
|
1246 |
monitor_printf(mon, "Class %04" PRId64, qdict_get_int(qdict, "class")); |
1247 |
} |
1248 |
|
1249 |
qdict = qdict_get_qdict(device, "id");
|
1250 |
monitor_printf(mon, ": PCI device %04" PRIx64 ":%04" PRIx64 "\n", |
1251 |
qdict_get_int(qdict, "device"),
|
1252 |
qdict_get_int(qdict, "vendor"));
|
1253 |
|
1254 |
if (qdict_haskey(device, "irq")) { |
1255 |
monitor_printf(mon, " IRQ %" PRId64 ".\n", |
1256 |
qdict_get_int(device, "irq"));
|
1257 |
} |
1258 |
|
1259 |
if (qdict_haskey(device, "pci_bridge")) { |
1260 |
QDict *info; |
1261 |
|
1262 |
qdict = qdict_get_qdict(device, "pci_bridge");
|
1263 |
|
1264 |
info = qdict_get_qdict(qdict, "bus");
|
1265 |
monitor_printf(mon, " BUS %" PRId64 ".\n", |
1266 |
qdict_get_int(info, "number"));
|
1267 |
monitor_printf(mon, " secondary bus %" PRId64 ".\n", |
1268 |
qdict_get_int(info, "secondary"));
|
1269 |
monitor_printf(mon, " subordinate bus %" PRId64 ".\n", |
1270 |
qdict_get_int(info, "subordinate"));
|
1271 |
|
1272 |
info = qdict_get_qdict(qdict, "io_range");
|
1273 |
monitor_printf(mon, " IO range [0x%04"PRIx64", 0x%04"PRIx64"]\n", |
1274 |
qdict_get_int(info, "base"),
|
1275 |
qdict_get_int(info, "limit"));
|
1276 |
|
1277 |
info = qdict_get_qdict(qdict, "memory_range");
|
1278 |
monitor_printf(mon, |
1279 |
" memory range [0x%08"PRIx64", 0x%08"PRIx64"]\n", |
1280 |
qdict_get_int(info, "base"),
|
1281 |
qdict_get_int(info, "limit"));
|
1282 |
|
1283 |
info = qdict_get_qdict(qdict, "prefetchable_range");
|
1284 |
monitor_printf(mon, " prefetchable memory range "
|
1285 |
"[0x%08"PRIx64", 0x%08"PRIx64"]\n", |
1286 |
qdict_get_int(info, "base"),
|
1287 |
qdict_get_int(info, "limit"));
|
1288 |
} |
1289 |
|
1290 |
QLIST_FOREACH_ENTRY(qdict_get_qlist(device, "regions"), entry) {
|
1291 |
qdict = qobject_to_qdict(qlist_entry_obj(entry)); |
1292 |
monitor_printf(mon, " BAR%d: ", (int) qdict_get_int(qdict, "bar")); |
1293 |
|
1294 |
addr = qdict_get_int(qdict, "address");
|
1295 |
size = qdict_get_int(qdict, "size");
|
1296 |
|
1297 |
if (!strcmp(qdict_get_str(qdict, "type"), "io")) { |
1298 |
monitor_printf(mon, "I/O at 0x%04"FMT_PCIBUS
|
1299 |
" [0x%04"FMT_PCIBUS"].\n", |
1300 |
addr, addr + size - 1);
|
1301 |
} else {
|
1302 |
monitor_printf(mon, "%d bit%s memory at 0x%08"FMT_PCIBUS
|
1303 |
" [0x%08"FMT_PCIBUS"].\n", |
1304 |
qdict_get_bool(qdict, "mem_type_64") ? 64 : 32, |
1305 |
qdict_get_bool(qdict, "prefetch") ?
|
1306 |
" prefetchable" : "", addr, addr + size - 1); |
1307 |
} |
1308 |
} |
1309 |
|
1310 |
monitor_printf(mon, " id \"%s\"\n", qdict_get_str(device, "qdev_id")); |
1311 |
|
1312 |
if (qdict_haskey(device, "pci_bridge")) { |
1313 |
qdict = qdict_get_qdict(device, "pci_bridge");
|
1314 |
if (qdict_haskey(qdict, "devices")) { |
1315 |
QListEntry *dev; |
1316 |
QLIST_FOREACH_ENTRY(qdict_get_qlist(qdict, "devices"), dev) {
|
1317 |
pci_device_print(mon, qobject_to_qdict(qlist_entry_obj(dev))); |
1318 |
} |
1319 |
} |
1320 |
} |
1321 |
} |
1322 |
|
1323 |
void do_pci_info_print(Monitor *mon, const QObject *data) |
1324 |
{ |
1325 |
QListEntry *bus, *dev; |
1326 |
|
1327 |
QLIST_FOREACH_ENTRY(qobject_to_qlist(data), bus) { |
1328 |
QDict *qdict = qobject_to_qdict(qlist_entry_obj(bus)); |
1329 |
QLIST_FOREACH_ENTRY(qdict_get_qlist(qdict, "devices"), dev) {
|
1330 |
pci_device_print(mon, qobject_to_qdict(qlist_entry_obj(dev))); |
1331 |
} |
1332 |
} |
1333 |
} |
1334 |
|
1335 |
static QObject *pci_get_dev_class(const PCIDevice *dev) |
1336 |
{ |
1337 |
int class;
|
1338 |
const pci_class_desc *desc;
|
1339 |
|
1340 |
class = pci_get_word(dev->config + PCI_CLASS_DEVICE); |
1341 |
desc = pci_class_descriptions; |
1342 |
while (desc->desc && class != desc->class)
|
1343 |
desc++; |
1344 |
|
1345 |
if (desc->desc) {
|
1346 |
return qobject_from_jsonf("{ 'desc': %s, 'class': %d }", |
1347 |
desc->desc, class); |
1348 |
} else {
|
1349 |
return qobject_from_jsonf("{ 'class': %d }", class); |
1350 |
} |
1351 |
} |
1352 |
|
1353 |
static QObject *pci_get_dev_id(const PCIDevice *dev) |
1354 |
{ |
1355 |
return qobject_from_jsonf("{ 'device': %d, 'vendor': %d }", |
1356 |
pci_get_word(dev->config + PCI_VENDOR_ID), |
1357 |
pci_get_word(dev->config + PCI_DEVICE_ID)); |
1358 |
} |
1359 |
|
1360 |
static QObject *pci_get_regions_list(const PCIDevice *dev) |
1361 |
{ |
1362 |
int i;
|
1363 |
QList *regions_list; |
1364 |
|
1365 |
regions_list = qlist_new(); |
1366 |
|
1367 |
for (i = 0; i < PCI_NUM_REGIONS; i++) { |
1368 |
QObject *obj; |
1369 |
const PCIIORegion *r = &dev->io_regions[i];
|
1370 |
|
1371 |
if (!r->size) {
|
1372 |
continue;
|
1373 |
} |
1374 |
|
1375 |
if (r->type & PCI_BASE_ADDRESS_SPACE_IO) {
|
1376 |
obj = qobject_from_jsonf("{ 'bar': %d, 'type': 'io', "
|
1377 |
"'address': %" PRId64 ", " |
1378 |
"'size': %" PRId64 " }", |
1379 |
i, r->addr, r->size); |
1380 |
} else {
|
1381 |
int mem_type_64 = r->type & PCI_BASE_ADDRESS_MEM_TYPE_64;
|
1382 |
|
1383 |
obj = qobject_from_jsonf("{ 'bar': %d, 'type': 'memory', "
|
1384 |
"'mem_type_64': %i, 'prefetch': %i, "
|
1385 |
"'address': %" PRId64 ", " |
1386 |
"'size': %" PRId64 " }", |
1387 |
i, mem_type_64, |
1388 |
r->type & PCI_BASE_ADDRESS_MEM_PREFETCH, |
1389 |
r->addr, r->size); |
1390 |
} |
1391 |
|
1392 |
qlist_append_obj(regions_list, obj); |
1393 |
} |
1394 |
|
1395 |
return QOBJECT(regions_list);
|
1396 |
} |
1397 |
|
1398 |
static QObject *pci_get_devices_list(PCIBus *bus, int bus_num); |
1399 |
|
1400 |
static QObject *pci_get_dev_dict(PCIDevice *dev, PCIBus *bus, int bus_num) |
1401 |
{ |
1402 |
uint8_t type; |
1403 |
QObject *obj; |
1404 |
|
1405 |
obj = qobject_from_jsonf("{ 'bus': %d, 'slot': %d, 'function': %d," "'class_info': %p, 'id': %p, 'regions': %p," |
1406 |
" 'qdev_id': %s }",
|
1407 |
bus_num, |
1408 |
PCI_SLOT(dev->devfn), PCI_FUNC(dev->devfn), |
1409 |
pci_get_dev_class(dev), pci_get_dev_id(dev), |
1410 |
pci_get_regions_list(dev), |
1411 |
dev->qdev.id ? dev->qdev.id : "");
|
1412 |
|
1413 |
if (dev->config[PCI_INTERRUPT_PIN] != 0) { |
1414 |
QDict *qdict = qobject_to_qdict(obj); |
1415 |
qdict_put(qdict, "irq", qint_from_int(dev->config[PCI_INTERRUPT_LINE]));
|
1416 |
} |
1417 |
|
1418 |
type = dev->config[PCI_HEADER_TYPE] & ~PCI_HEADER_TYPE_MULTI_FUNCTION; |
1419 |
if (type == PCI_HEADER_TYPE_BRIDGE) {
|
1420 |
QDict *qdict; |
1421 |
QObject *pci_bridge; |
1422 |
|
1423 |
pci_bridge = qobject_from_jsonf("{ 'bus': "
|
1424 |
"{ 'number': %d, 'secondary': %d, 'subordinate': %d }, "
|
1425 |
"'io_range': { 'base': %" PRId64 ", 'limit': %" PRId64 "}, " |
1426 |
"'memory_range': { 'base': %" PRId64 ", 'limit': %" PRId64 "}, " |
1427 |
"'prefetchable_range': { 'base': %" PRId64 ", 'limit': %" PRId64 "} }", |
1428 |
dev->config[PCI_PRIMARY_BUS], dev->config[PCI_SECONDARY_BUS], |
1429 |
dev->config[PCI_SUBORDINATE_BUS], |
1430 |
pci_bridge_get_base(dev, PCI_BASE_ADDRESS_SPACE_IO), |
1431 |
pci_bridge_get_limit(dev, PCI_BASE_ADDRESS_SPACE_IO), |
1432 |
pci_bridge_get_base(dev, PCI_BASE_ADDRESS_SPACE_MEMORY), |
1433 |
pci_bridge_get_limit(dev, PCI_BASE_ADDRESS_SPACE_MEMORY), |
1434 |
pci_bridge_get_base(dev, PCI_BASE_ADDRESS_SPACE_MEMORY | |
1435 |
PCI_BASE_ADDRESS_MEM_PREFETCH), |
1436 |
pci_bridge_get_limit(dev, PCI_BASE_ADDRESS_SPACE_MEMORY | |
1437 |
PCI_BASE_ADDRESS_MEM_PREFETCH)); |
1438 |
|
1439 |
if (dev->config[PCI_SECONDARY_BUS] != 0) { |
1440 |
PCIBus *child_bus = pci_find_bus(bus, dev->config[PCI_SECONDARY_BUS]); |
1441 |
|
1442 |
if (child_bus) {
|
1443 |
qdict = qobject_to_qdict(pci_bridge); |
1444 |
qdict_put_obj(qdict, "devices",
|
1445 |
pci_get_devices_list(child_bus, |
1446 |
dev->config[PCI_SECONDARY_BUS])); |
1447 |
} |
1448 |
} |
1449 |
qdict = qobject_to_qdict(obj); |
1450 |
qdict_put_obj(qdict, "pci_bridge", pci_bridge);
|
1451 |
} |
1452 |
|
1453 |
return obj;
|
1454 |
} |
1455 |
|
1456 |
static QObject *pci_get_devices_list(PCIBus *bus, int bus_num) |
1457 |
{ |
1458 |
int devfn;
|
1459 |
PCIDevice *dev; |
1460 |
QList *dev_list; |
1461 |
|
1462 |
dev_list = qlist_new(); |
1463 |
|
1464 |
for (devfn = 0; devfn < ARRAY_SIZE(bus->devices); devfn++) { |
1465 |
dev = bus->devices[devfn]; |
1466 |
if (dev) {
|
1467 |
qlist_append_obj(dev_list, pci_get_dev_dict(dev, bus, bus_num)); |
1468 |
} |
1469 |
} |
1470 |
|
1471 |
return QOBJECT(dev_list);
|
1472 |
} |
1473 |
|
1474 |
static QObject *pci_get_bus_dict(PCIBus *bus, int bus_num) |
1475 |
{ |
1476 |
bus = pci_find_bus(bus, bus_num); |
1477 |
if (bus) {
|
1478 |
return qobject_from_jsonf("{ 'bus': %d, 'devices': %p }", |
1479 |
bus_num, pci_get_devices_list(bus, bus_num)); |
1480 |
} |
1481 |
|
1482 |
return NULL; |
1483 |
} |
1484 |
|
1485 |
void do_pci_info(Monitor *mon, QObject **ret_data)
|
1486 |
{ |
1487 |
QList *bus_list; |
1488 |
struct PCIHostBus *host;
|
1489 |
|
1490 |
bus_list = qlist_new(); |
1491 |
|
1492 |
QLIST_FOREACH(host, &host_buses, next) { |
1493 |
QObject *obj = pci_get_bus_dict(host->bus, 0);
|
1494 |
if (obj) {
|
1495 |
qlist_append_obj(bus_list, obj); |
1496 |
} |
1497 |
} |
1498 |
|
1499 |
*ret_data = QOBJECT(bus_list); |
1500 |
} |
1501 |
|
1502 |
static const char * const pci_nic_models[] = { |
1503 |
"ne2k_pci",
|
1504 |
"i82551",
|
1505 |
"i82557b",
|
1506 |
"i82559er",
|
1507 |
"rtl8139",
|
1508 |
"e1000",
|
1509 |
"pcnet",
|
1510 |
"virtio",
|
1511 |
NULL
|
1512 |
}; |
1513 |
|
1514 |
static const char * const pci_nic_names[] = { |
1515 |
"ne2k_pci",
|
1516 |
"i82551",
|
1517 |
"i82557b",
|
1518 |
"i82559er",
|
1519 |
"rtl8139",
|
1520 |
"e1000",
|
1521 |
"pcnet",
|
1522 |
"virtio-net-pci",
|
1523 |
NULL
|
1524 |
}; |
1525 |
|
1526 |
/* Initialize a PCI NIC. */
|
1527 |
/* FIXME callers should check for failure, but don't */
|
1528 |
PCIDevice *pci_nic_init(NICInfo *nd, const char *default_model, |
1529 |
const char *default_devaddr) |
1530 |
{ |
1531 |
const char *devaddr = nd->devaddr ? nd->devaddr : default_devaddr; |
1532 |
PCIBus *bus; |
1533 |
int devfn;
|
1534 |
PCIDevice *pci_dev; |
1535 |
DeviceState *dev; |
1536 |
int i;
|
1537 |
|
1538 |
i = qemu_find_nic_model(nd, pci_nic_models, default_model); |
1539 |
if (i < 0) |
1540 |
return NULL; |
1541 |
|
1542 |
bus = pci_get_bus_devfn(&devfn, devaddr); |
1543 |
if (!bus) {
|
1544 |
error_report("Invalid PCI device address %s for device %s",
|
1545 |
devaddr, pci_nic_names[i]); |
1546 |
return NULL; |
1547 |
} |
1548 |
|
1549 |
pci_dev = pci_create(bus, devfn, pci_nic_names[i]); |
1550 |
dev = &pci_dev->qdev; |
1551 |
qdev_set_nic_properties(dev, nd); |
1552 |
if (qdev_init(dev) < 0) |
1553 |
return NULL; |
1554 |
return pci_dev;
|
1555 |
} |
1556 |
|
1557 |
PCIDevice *pci_nic_init_nofail(NICInfo *nd, const char *default_model, |
1558 |
const char *default_devaddr) |
1559 |
{ |
1560 |
PCIDevice *res; |
1561 |
|
1562 |
if (qemu_show_nic_models(nd->model, pci_nic_models))
|
1563 |
exit(0);
|
1564 |
|
1565 |
res = pci_nic_init(nd, default_model, default_devaddr); |
1566 |
if (!res)
|
1567 |
exit(1);
|
1568 |
return res;
|
1569 |
} |
1570 |
|
1571 |
static void pci_bridge_update_mappings_fn(PCIBus *b, PCIDevice *d) |
1572 |
{ |
1573 |
pci_update_mappings(d); |
1574 |
} |
1575 |
|
1576 |
void pci_bridge_update_mappings(PCIBus *b)
|
1577 |
{ |
1578 |
PCIBus *child; |
1579 |
|
1580 |
pci_for_each_device_under_bus(b, pci_bridge_update_mappings_fn); |
1581 |
|
1582 |
QLIST_FOREACH(child, &b->child, sibling) { |
1583 |
pci_bridge_update_mappings(child); |
1584 |
} |
1585 |
} |
1586 |
|
1587 |
/* Whether a given bus number is in range of the secondary
|
1588 |
* bus of the given bridge device. */
|
1589 |
static bool pci_secondary_bus_in_range(PCIDevice *dev, int bus_num) |
1590 |
{ |
1591 |
return !(pci_get_word(dev->config + PCI_BRIDGE_CONTROL) &
|
1592 |
PCI_BRIDGE_CTL_BUS_RESET) /* Don't walk the bus if it's reset. */ &&
|
1593 |
dev->config[PCI_SECONDARY_BUS] < bus_num && |
1594 |
bus_num <= dev->config[PCI_SUBORDINATE_BUS]; |
1595 |
} |
1596 |
|
1597 |
PCIBus *pci_find_bus(PCIBus *bus, int bus_num)
|
1598 |
{ |
1599 |
PCIBus *sec; |
1600 |
|
1601 |
if (!bus) {
|
1602 |
return NULL; |
1603 |
} |
1604 |
|
1605 |
if (pci_bus_num(bus) == bus_num) {
|
1606 |
return bus;
|
1607 |
} |
1608 |
|
1609 |
/* Consider all bus numbers in range for the host pci bridge. */
|
1610 |
if (bus->parent_dev &&
|
1611 |
!pci_secondary_bus_in_range(bus->parent_dev, bus_num)) { |
1612 |
return NULL; |
1613 |
} |
1614 |
|
1615 |
/* try child bus */
|
1616 |
for (; bus; bus = sec) {
|
1617 |
QLIST_FOREACH(sec, &bus->child, sibling) { |
1618 |
assert(sec->parent_dev); |
1619 |
if (sec->parent_dev->config[PCI_SECONDARY_BUS] == bus_num) {
|
1620 |
return sec;
|
1621 |
} |
1622 |
if (pci_secondary_bus_in_range(sec->parent_dev, bus_num)) {
|
1623 |
break;
|
1624 |
} |
1625 |
} |
1626 |
} |
1627 |
|
1628 |
return NULL; |
1629 |
} |
1630 |
|
1631 |
PCIDevice *pci_find_device(PCIBus *bus, int bus_num, uint8_t devfn)
|
1632 |
{ |
1633 |
bus = pci_find_bus(bus, bus_num); |
1634 |
|
1635 |
if (!bus)
|
1636 |
return NULL; |
1637 |
|
1638 |
return bus->devices[devfn];
|
1639 |
} |
1640 |
|
1641 |
static int pci_qdev_init(DeviceState *qdev, DeviceInfo *base) |
1642 |
{ |
1643 |
PCIDevice *pci_dev = (PCIDevice *)qdev; |
1644 |
PCIDeviceInfo *info = container_of(base, PCIDeviceInfo, qdev); |
1645 |
PCIBus *bus; |
1646 |
int devfn, rc;
|
1647 |
bool is_default_rom;
|
1648 |
|
1649 |
/* initialize cap_present for pci_is_express() and pci_config_size() */
|
1650 |
if (info->is_express) {
|
1651 |
pci_dev->cap_present |= QEMU_PCI_CAP_EXPRESS; |
1652 |
} |
1653 |
|
1654 |
bus = FROM_QBUS(PCIBus, qdev_get_parent_bus(qdev)); |
1655 |
devfn = pci_dev->devfn; |
1656 |
pci_dev = do_pci_register_device(pci_dev, bus, base->name, devfn, |
1657 |
info->config_read, info->config_write, |
1658 |
info->is_bridge); |
1659 |
if (pci_dev == NULL) |
1660 |
return -1; |
1661 |
if (qdev->hotplugged && info->no_hotplug) {
|
1662 |
qerror_report(QERR_DEVICE_NO_HOTPLUG, info->qdev.name); |
1663 |
do_pci_unregister_device(pci_dev); |
1664 |
return -1; |
1665 |
} |
1666 |
rc = info->init(pci_dev); |
1667 |
if (rc != 0) { |
1668 |
do_pci_unregister_device(pci_dev); |
1669 |
return rc;
|
1670 |
} |
1671 |
|
1672 |
/* rom loading */
|
1673 |
is_default_rom = false;
|
1674 |
if (pci_dev->romfile == NULL && info->romfile != NULL) { |
1675 |
pci_dev->romfile = qemu_strdup(info->romfile); |
1676 |
is_default_rom = true;
|
1677 |
} |
1678 |
pci_add_option_rom(pci_dev, is_default_rom); |
1679 |
|
1680 |
if (bus->hotplug) {
|
1681 |
/* Let buses differentiate between hotplug and when device is
|
1682 |
* enabled during qemu machine creation. */
|
1683 |
rc = bus->hotplug(bus->hotplug_qdev, pci_dev, |
1684 |
qdev->hotplugged ? PCI_HOTPLUG_ENABLED: |
1685 |
PCI_COLDPLUG_ENABLED); |
1686 |
if (rc != 0) { |
1687 |
int r = pci_unregister_device(&pci_dev->qdev);
|
1688 |
assert(!r); |
1689 |
return rc;
|
1690 |
} |
1691 |
} |
1692 |
return 0; |
1693 |
} |
1694 |
|
1695 |
static int pci_unplug_device(DeviceState *qdev) |
1696 |
{ |
1697 |
PCIDevice *dev = DO_UPCAST(PCIDevice, qdev, qdev); |
1698 |
PCIDeviceInfo *info = container_of(qdev->info, PCIDeviceInfo, qdev); |
1699 |
|
1700 |
if (info->no_hotplug) {
|
1701 |
qerror_report(QERR_DEVICE_NO_HOTPLUG, info->qdev.name); |
1702 |
return -1; |
1703 |
} |
1704 |
return dev->bus->hotplug(dev->bus->hotplug_qdev, dev,
|
1705 |
PCI_HOTPLUG_DISABLED); |
1706 |
} |
1707 |
|
1708 |
void pci_qdev_register(PCIDeviceInfo *info)
|
1709 |
{ |
1710 |
info->qdev.init = pci_qdev_init; |
1711 |
info->qdev.unplug = pci_unplug_device; |
1712 |
info->qdev.exit = pci_unregister_device; |
1713 |
info->qdev.bus_info = &pci_bus_info; |
1714 |
qdev_register(&info->qdev); |
1715 |
} |
1716 |
|
1717 |
void pci_qdev_register_many(PCIDeviceInfo *info)
|
1718 |
{ |
1719 |
while (info->qdev.name) {
|
1720 |
pci_qdev_register(info); |
1721 |
info++; |
1722 |
} |
1723 |
} |
1724 |
|
1725 |
PCIDevice *pci_create_multifunction(PCIBus *bus, int devfn, bool multifunction, |
1726 |
const char *name) |
1727 |
{ |
1728 |
DeviceState *dev; |
1729 |
|
1730 |
dev = qdev_create(&bus->qbus, name); |
1731 |
qdev_prop_set_uint32(dev, "addr", devfn);
|
1732 |
qdev_prop_set_bit(dev, "multifunction", multifunction);
|
1733 |
return DO_UPCAST(PCIDevice, qdev, dev);
|
1734 |
} |
1735 |
|
1736 |
PCIDevice *pci_try_create_multifunction(PCIBus *bus, int devfn,
|
1737 |
bool multifunction,
|
1738 |
const char *name) |
1739 |
{ |
1740 |
DeviceState *dev; |
1741 |
|
1742 |
dev = qdev_try_create(&bus->qbus, name); |
1743 |
if (!dev) {
|
1744 |
return NULL; |
1745 |
} |
1746 |
qdev_prop_set_uint32(dev, "addr", devfn);
|
1747 |
qdev_prop_set_bit(dev, "multifunction", multifunction);
|
1748 |
return DO_UPCAST(PCIDevice, qdev, dev);
|
1749 |
} |
1750 |
|
1751 |
PCIDevice *pci_create_simple_multifunction(PCIBus *bus, int devfn,
|
1752 |
bool multifunction,
|
1753 |
const char *name) |
1754 |
{ |
1755 |
PCIDevice *dev = pci_create_multifunction(bus, devfn, multifunction, name); |
1756 |
qdev_init_nofail(&dev->qdev); |
1757 |
return dev;
|
1758 |
} |
1759 |
|
1760 |
PCIDevice *pci_create(PCIBus *bus, int devfn, const char *name) |
1761 |
{ |
1762 |
return pci_create_multifunction(bus, devfn, false, name); |
1763 |
} |
1764 |
|
1765 |
PCIDevice *pci_create_simple(PCIBus *bus, int devfn, const char *name) |
1766 |
{ |
1767 |
return pci_create_simple_multifunction(bus, devfn, false, name); |
1768 |
} |
1769 |
|
1770 |
PCIDevice *pci_try_create(PCIBus *bus, int devfn, const char *name) |
1771 |
{ |
1772 |
return pci_try_create_multifunction(bus, devfn, false, name); |
1773 |
} |
1774 |
|
1775 |
static int pci_find_space(PCIDevice *pdev, uint8_t size) |
1776 |
{ |
1777 |
int config_size = pci_config_size(pdev);
|
1778 |
int offset = PCI_CONFIG_HEADER_SIZE;
|
1779 |
int i;
|
1780 |
for (i = PCI_CONFIG_HEADER_SIZE; i < config_size; ++i)
|
1781 |
if (pdev->used[i])
|
1782 |
offset = i + 1;
|
1783 |
else if (i - offset + 1 == size) |
1784 |
return offset;
|
1785 |
return 0; |
1786 |
} |
1787 |
|
1788 |
static uint8_t pci_find_capability_list(PCIDevice *pdev, uint8_t cap_id,
|
1789 |
uint8_t *prev_p) |
1790 |
{ |
1791 |
uint8_t next, prev; |
1792 |
|
1793 |
if (!(pdev->config[PCI_STATUS] & PCI_STATUS_CAP_LIST))
|
1794 |
return 0; |
1795 |
|
1796 |
for (prev = PCI_CAPABILITY_LIST; (next = pdev->config[prev]);
|
1797 |
prev = next + PCI_CAP_LIST_NEXT) |
1798 |
if (pdev->config[next + PCI_CAP_LIST_ID] == cap_id)
|
1799 |
break;
|
1800 |
|
1801 |
if (prev_p)
|
1802 |
*prev_p = prev; |
1803 |
return next;
|
1804 |
} |
1805 |
|
1806 |
static void pci_map_option_rom(PCIDevice *pdev, int region_num, pcibus_t addr, pcibus_t size, int type) |
1807 |
{ |
1808 |
cpu_register_physical_memory(addr, size, pdev->rom_offset); |
1809 |
} |
1810 |
|
1811 |
/* Patch the PCI vendor and device ids in a PCI rom image if necessary.
|
1812 |
This is needed for an option rom which is used for more than one device. */
|
1813 |
static void pci_patch_ids(PCIDevice *pdev, uint8_t *ptr, int size) |
1814 |
{ |
1815 |
uint16_t vendor_id; |
1816 |
uint16_t device_id; |
1817 |
uint16_t rom_vendor_id; |
1818 |
uint16_t rom_device_id; |
1819 |
uint16_t rom_magic; |
1820 |
uint16_t pcir_offset; |
1821 |
uint8_t checksum; |
1822 |
|
1823 |
/* Words in rom data are little endian (like in PCI configuration),
|
1824 |
so they can be read / written with pci_get_word / pci_set_word. */
|
1825 |
|
1826 |
/* Only a valid rom will be patched. */
|
1827 |
rom_magic = pci_get_word(ptr); |
1828 |
if (rom_magic != 0xaa55) { |
1829 |
PCI_DPRINTF("Bad ROM magic %04x\n", rom_magic);
|
1830 |
return;
|
1831 |
} |
1832 |
pcir_offset = pci_get_word(ptr + 0x18);
|
1833 |
if (pcir_offset + 8 >= size || memcmp(ptr + pcir_offset, "PCIR", 4)) { |
1834 |
PCI_DPRINTF("Bad PCIR offset 0x%x or signature\n", pcir_offset);
|
1835 |
return;
|
1836 |
} |
1837 |
|
1838 |
vendor_id = pci_get_word(pdev->config + PCI_VENDOR_ID); |
1839 |
device_id = pci_get_word(pdev->config + PCI_DEVICE_ID); |
1840 |
rom_vendor_id = pci_get_word(ptr + pcir_offset + 4);
|
1841 |
rom_device_id = pci_get_word(ptr + pcir_offset + 6);
|
1842 |
|
1843 |
PCI_DPRINTF("%s: ROM id %04x%04x / PCI id %04x%04x\n", pdev->romfile,
|
1844 |
vendor_id, device_id, rom_vendor_id, rom_device_id); |
1845 |
|
1846 |
checksum = ptr[6];
|
1847 |
|
1848 |
if (vendor_id != rom_vendor_id) {
|
1849 |
/* Patch vendor id and checksum (at offset 6 for etherboot roms). */
|
1850 |
checksum += (uint8_t)rom_vendor_id + (uint8_t)(rom_vendor_id >> 8);
|
1851 |
checksum -= (uint8_t)vendor_id + (uint8_t)(vendor_id >> 8);
|
1852 |
PCI_DPRINTF("ROM checksum %02x / %02x\n", ptr[6], checksum); |
1853 |
ptr[6] = checksum;
|
1854 |
pci_set_word(ptr + pcir_offset + 4, vendor_id);
|
1855 |
} |
1856 |
|
1857 |
if (device_id != rom_device_id) {
|
1858 |
/* Patch device id and checksum (at offset 6 for etherboot roms). */
|
1859 |
checksum += (uint8_t)rom_device_id + (uint8_t)(rom_device_id >> 8);
|
1860 |
checksum -= (uint8_t)device_id + (uint8_t)(device_id >> 8);
|
1861 |
PCI_DPRINTF("ROM checksum %02x / %02x\n", ptr[6], checksum); |
1862 |
ptr[6] = checksum;
|
1863 |
pci_set_word(ptr + pcir_offset + 6, device_id);
|
1864 |
} |
1865 |
} |
1866 |
|
1867 |
/* Add an option rom for the device */
|
1868 |
static int pci_add_option_rom(PCIDevice *pdev, bool is_default_rom) |
1869 |
{ |
1870 |
int size;
|
1871 |
char *path;
|
1872 |
void *ptr;
|
1873 |
char name[32]; |
1874 |
|
1875 |
if (!pdev->romfile)
|
1876 |
return 0; |
1877 |
if (strlen(pdev->romfile) == 0) |
1878 |
return 0; |
1879 |
|
1880 |
if (!pdev->rom_bar) {
|
1881 |
/*
|
1882 |
* Load rom via fw_cfg instead of creating a rom bar,
|
1883 |
* for 0.11 compatibility.
|
1884 |
*/
|
1885 |
int class = pci_get_word(pdev->config + PCI_CLASS_DEVICE);
|
1886 |
if (class == 0x0300) { |
1887 |
rom_add_vga(pdev->romfile); |
1888 |
} else {
|
1889 |
rom_add_option(pdev->romfile, -1);
|
1890 |
} |
1891 |
return 0; |
1892 |
} |
1893 |
|
1894 |
path = qemu_find_file(QEMU_FILE_TYPE_BIOS, pdev->romfile); |
1895 |
if (path == NULL) { |
1896 |
path = qemu_strdup(pdev->romfile); |
1897 |
} |
1898 |
|
1899 |
size = get_image_size(path); |
1900 |
if (size < 0) { |
1901 |
error_report("%s: failed to find romfile \"%s\"",
|
1902 |
__FUNCTION__, pdev->romfile); |
1903 |
qemu_free(path); |
1904 |
return -1; |
1905 |
} |
1906 |
if (size & (size - 1)) { |
1907 |
size = 1 << qemu_fls(size);
|
1908 |
} |
1909 |
|
1910 |
if (pdev->qdev.info->vmsd)
|
1911 |
snprintf(name, sizeof(name), "%s.rom", pdev->qdev.info->vmsd->name); |
1912 |
else
|
1913 |
snprintf(name, sizeof(name), "%s.rom", pdev->qdev.info->name); |
1914 |
pdev->rom_offset = qemu_ram_alloc(&pdev->qdev, name, size); |
1915 |
|
1916 |
ptr = qemu_get_ram_ptr(pdev->rom_offset); |
1917 |
load_image(path, ptr); |
1918 |
qemu_free(path); |
1919 |
|
1920 |
if (is_default_rom) {
|
1921 |
/* Only the default rom images will be patched (if needed). */
|
1922 |
pci_patch_ids(pdev, ptr, size); |
1923 |
} |
1924 |
|
1925 |
qemu_put_ram_ptr(ptr); |
1926 |
|
1927 |
pci_register_bar(pdev, PCI_ROM_SLOT, size, |
1928 |
0, pci_map_option_rom);
|
1929 |
|
1930 |
return 0; |
1931 |
} |
1932 |
|
1933 |
static void pci_del_option_rom(PCIDevice *pdev) |
1934 |
{ |
1935 |
if (!pdev->rom_offset)
|
1936 |
return;
|
1937 |
|
1938 |
qemu_ram_free(pdev->rom_offset); |
1939 |
pdev->rom_offset = 0;
|
1940 |
} |
1941 |
|
1942 |
/*
|
1943 |
* if !offset
|
1944 |
* Reserve space and add capability to the linked list in pci config space
|
1945 |
*
|
1946 |
* if offset = 0,
|
1947 |
* Find and reserve space and add capability to the linked list
|
1948 |
* in pci config space */
|
1949 |
int pci_add_capability(PCIDevice *pdev, uint8_t cap_id,
|
1950 |
uint8_t offset, uint8_t size) |
1951 |
{ |
1952 |
uint8_t *config; |
1953 |
if (!offset) {
|
1954 |
offset = pci_find_space(pdev, size); |
1955 |
if (!offset) {
|
1956 |
return -ENOSPC;
|
1957 |
} |
1958 |
} |
1959 |
|
1960 |
config = pdev->config + offset; |
1961 |
config[PCI_CAP_LIST_ID] = cap_id; |
1962 |
config[PCI_CAP_LIST_NEXT] = pdev->config[PCI_CAPABILITY_LIST]; |
1963 |
pdev->config[PCI_CAPABILITY_LIST] = offset; |
1964 |
pdev->config[PCI_STATUS] |= PCI_STATUS_CAP_LIST; |
1965 |
memset(pdev->used + offset, 0xFF, size);
|
1966 |
/* Make capability read-only by default */
|
1967 |
memset(pdev->wmask + offset, 0, size);
|
1968 |
/* Check capability by default */
|
1969 |
memset(pdev->cmask + offset, 0xFF, size);
|
1970 |
return offset;
|
1971 |
} |
1972 |
|
1973 |
/* Unlink capability from the pci config space. */
|
1974 |
void pci_del_capability(PCIDevice *pdev, uint8_t cap_id, uint8_t size)
|
1975 |
{ |
1976 |
uint8_t prev, offset = pci_find_capability_list(pdev, cap_id, &prev); |
1977 |
if (!offset)
|
1978 |
return;
|
1979 |
pdev->config[prev] = pdev->config[offset + PCI_CAP_LIST_NEXT]; |
1980 |
/* Make capability writable again */
|
1981 |
memset(pdev->wmask + offset, 0xff, size);
|
1982 |
memset(pdev->w1cmask + offset, 0, size);
|
1983 |
/* Clear cmask as device-specific registers can't be checked */
|
1984 |
memset(pdev->cmask + offset, 0, size);
|
1985 |
memset(pdev->used + offset, 0, size);
|
1986 |
|
1987 |
if (!pdev->config[PCI_CAPABILITY_LIST])
|
1988 |
pdev->config[PCI_STATUS] &= ~PCI_STATUS_CAP_LIST; |
1989 |
} |
1990 |
|
1991 |
/* Reserve space for capability at a known offset (to call after load). */
|
1992 |
void pci_reserve_capability(PCIDevice *pdev, uint8_t offset, uint8_t size)
|
1993 |
{ |
1994 |
memset(pdev->used + offset, 0xff, size);
|
1995 |
} |
1996 |
|
1997 |
uint8_t pci_find_capability(PCIDevice *pdev, uint8_t cap_id) |
1998 |
{ |
1999 |
return pci_find_capability_list(pdev, cap_id, NULL); |
2000 |
} |
2001 |
|
2002 |
static void pcibus_dev_print(Monitor *mon, DeviceState *dev, int indent) |
2003 |
{ |
2004 |
PCIDevice *d = (PCIDevice *)dev; |
2005 |
const pci_class_desc *desc;
|
2006 |
char ctxt[64]; |
2007 |
PCIIORegion *r; |
2008 |
int i, class;
|
2009 |
|
2010 |
class = pci_get_word(d->config + PCI_CLASS_DEVICE); |
2011 |
desc = pci_class_descriptions; |
2012 |
while (desc->desc && class != desc->class)
|
2013 |
desc++; |
2014 |
if (desc->desc) {
|
2015 |
snprintf(ctxt, sizeof(ctxt), "%s", desc->desc); |
2016 |
} else {
|
2017 |
snprintf(ctxt, sizeof(ctxt), "Class %04x", class); |
2018 |
} |
2019 |
|
2020 |
monitor_printf(mon, "%*sclass %s, addr %02x:%02x.%x, "
|
2021 |
"pci id %04x:%04x (sub %04x:%04x)\n",
|
2022 |
indent, "", ctxt, pci_bus_num(d->bus),
|
2023 |
PCI_SLOT(d->devfn), PCI_FUNC(d->devfn), |
2024 |
pci_get_word(d->config + PCI_VENDOR_ID), |
2025 |
pci_get_word(d->config + PCI_DEVICE_ID), |
2026 |
pci_get_word(d->config + PCI_SUBSYSTEM_VENDOR_ID), |
2027 |
pci_get_word(d->config + PCI_SUBSYSTEM_ID)); |
2028 |
for (i = 0; i < PCI_NUM_REGIONS; i++) { |
2029 |
r = &d->io_regions[i]; |
2030 |
if (!r->size)
|
2031 |
continue;
|
2032 |
monitor_printf(mon, "%*sbar %d: %s at 0x%"FMT_PCIBUS
|
2033 |
" [0x%"FMT_PCIBUS"]\n", |
2034 |
indent, "",
|
2035 |
i, r->type & PCI_BASE_ADDRESS_SPACE_IO ? "i/o" : "mem", |
2036 |
r->addr, r->addr + r->size - 1);
|
2037 |
} |
2038 |
} |
2039 |
|
2040 |
static char *pci_dev_fw_name(DeviceState *dev, char *buf, int len) |
2041 |
{ |
2042 |
PCIDevice *d = (PCIDevice *)dev; |
2043 |
const char *name = NULL; |
2044 |
const pci_class_desc *desc = pci_class_descriptions;
|
2045 |
int class = pci_get_word(d->config + PCI_CLASS_DEVICE);
|
2046 |
|
2047 |
while (desc->desc &&
|
2048 |
(class & ~desc->fw_ign_bits) != |
2049 |
(desc->class & ~desc->fw_ign_bits)) { |
2050 |
desc++; |
2051 |
} |
2052 |
|
2053 |
if (desc->desc) {
|
2054 |
name = desc->fw_name; |
2055 |
} |
2056 |
|
2057 |
if (name) {
|
2058 |
pstrcpy(buf, len, name); |
2059 |
} else {
|
2060 |
snprintf(buf, len, "pci%04x,%04x",
|
2061 |
pci_get_word(d->config + PCI_VENDOR_ID), |
2062 |
pci_get_word(d->config + PCI_DEVICE_ID)); |
2063 |
} |
2064 |
|
2065 |
return buf;
|
2066 |
} |
2067 |
|
2068 |
static char *pcibus_get_fw_dev_path(DeviceState *dev) |
2069 |
{ |
2070 |
PCIDevice *d = (PCIDevice *)dev; |
2071 |
char path[50], name[33]; |
2072 |
int off;
|
2073 |
|
2074 |
off = snprintf(path, sizeof(path), "%s@%x", |
2075 |
pci_dev_fw_name(dev, name, sizeof name),
|
2076 |
PCI_SLOT(d->devfn)); |
2077 |
if (PCI_FUNC(d->devfn))
|
2078 |
snprintf(path + off, sizeof(path) + off, ",%x", PCI_FUNC(d->devfn)); |
2079 |
return strdup(path);
|
2080 |
} |
2081 |
|
2082 |
static char *pcibus_get_dev_path(DeviceState *dev) |
2083 |
{ |
2084 |
PCIDevice *d = container_of(dev, PCIDevice, qdev); |
2085 |
PCIDevice *t; |
2086 |
int slot_depth;
|
2087 |
/* Path format: Domain:00:Slot.Function:Slot.Function....:Slot.Function.
|
2088 |
* 00 is added here to make this format compatible with
|
2089 |
* domain:Bus:Slot.Func for systems without nested PCI bridges.
|
2090 |
* Slot.Function list specifies the slot and function numbers for all
|
2091 |
* devices on the path from root to the specific device. */
|
2092 |
char domain[] = "DDDD:00"; |
2093 |
char slot[] = ":SS.F"; |
2094 |
int domain_len = sizeof domain - 1 /* For '\0' */; |
2095 |
int slot_len = sizeof slot - 1 /* For '\0' */; |
2096 |
int path_len;
|
2097 |
char *path, *p;
|
2098 |
int s;
|
2099 |
|
2100 |
/* Calculate # of slots on path between device and root. */;
|
2101 |
slot_depth = 0;
|
2102 |
for (t = d; t; t = t->bus->parent_dev) {
|
2103 |
++slot_depth; |
2104 |
} |
2105 |
|
2106 |
path_len = domain_len + slot_len * slot_depth; |
2107 |
|
2108 |
/* Allocate memory, fill in the terminating null byte. */
|
2109 |
path = qemu_malloc(path_len + 1 /* For '\0' */); |
2110 |
path[path_len] = '\0';
|
2111 |
|
2112 |
/* First field is the domain. */
|
2113 |
s = snprintf(domain, sizeof domain, "%04x:00", pci_find_domain(d->bus)); |
2114 |
assert(s == domain_len); |
2115 |
memcpy(path, domain, domain_len); |
2116 |
|
2117 |
/* Fill in slot numbers. We walk up from device to root, so need to print
|
2118 |
* them in the reverse order, last to first. */
|
2119 |
p = path + path_len; |
2120 |
for (t = d; t; t = t->bus->parent_dev) {
|
2121 |
p -= slot_len; |
2122 |
s = snprintf(slot, sizeof slot, ":%02x.%x", |
2123 |
PCI_SLOT(t->devfn), PCI_FUNC(t->devfn)); |
2124 |
assert(s == slot_len); |
2125 |
memcpy(p, slot, slot_len); |
2126 |
} |
2127 |
|
2128 |
return path;
|
2129 |
} |
2130 |
|
2131 |
static int pci_qdev_find_recursive(PCIBus *bus, |
2132 |
const char *id, PCIDevice **pdev) |
2133 |
{ |
2134 |
DeviceState *qdev = qdev_find_recursive(&bus->qbus, id); |
2135 |
if (!qdev) {
|
2136 |
return -ENODEV;
|
2137 |
} |
2138 |
|
2139 |
/* roughly check if given qdev is pci device */
|
2140 |
if (qdev->info->init == &pci_qdev_init &&
|
2141 |
qdev->parent_bus->info == &pci_bus_info) { |
2142 |
*pdev = DO_UPCAST(PCIDevice, qdev, qdev); |
2143 |
return 0; |
2144 |
} |
2145 |
return -EINVAL;
|
2146 |
} |
2147 |
|
2148 |
int pci_qdev_find_device(const char *id, PCIDevice **pdev) |
2149 |
{ |
2150 |
struct PCIHostBus *host;
|
2151 |
int rc = -ENODEV;
|
2152 |
|
2153 |
QLIST_FOREACH(host, &host_buses, next) { |
2154 |
int tmp = pci_qdev_find_recursive(host->bus, id, pdev);
|
2155 |
if (!tmp) {
|
2156 |
rc = 0;
|
2157 |
break;
|
2158 |
} |
2159 |
if (tmp != -ENODEV) {
|
2160 |
rc = tmp; |
2161 |
} |
2162 |
} |
2163 |
|
2164 |
return rc;
|
2165 |
} |