include/hw/pci/pci_host.h

   1 /*
   2  * QEMU Common PCI Host bridge configuration data space access routines.
   3  *
   4  * Copyright (c) 2006 Fabrice Bellard
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a copy
   7  * of this software and associated documentation files (the "Software"), to deal
   8  * in the Software without restriction, including without limitation the rights
   9  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  10  * copies of the Software, and to permit persons to whom the Software is
  11  * furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice shall be included in
  14  * all copies or substantial portions of the Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  19  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  21  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  22  * THE SOFTWARE.
  23  */
  24
  25 /* Worker routines for a PCI host controller that uses an {address,data}
  26    register pair to access PCI configuration space.  */
  27
  28 #ifndef PCI_HOST_H
  29 #define PCI_HOST_H
  30
  31 #include "hw/sysbus.h"
  32 #include "qom/object.h"
  33
  34 #define PCI_HOST_BYPASS_IOMMU "bypass-iommu"
  35
  36 #define TYPE_PCI_HOST_BRIDGE "pci-host-bridge"
  37 OBJECT_DECLARE_TYPE(PCIHostState, PCIHostBridgeClass, PCI_HOST_BRIDGE)
  38
  39 struct PCIHostState {
  40     SysBusDevice busdev;
  41
  42     MemoryRegion conf_mem;
  43     MemoryRegion data_mem;
  44     MemoryRegion mmcfg;
  45     uint32_t config_reg;
  46     bool mig_enabled;
  47     PCIBus *bus;
  48     bool bypass_iommu;
  49
  50     QLIST_ENTRY(PCIHostState) next;
  51 };
  52
  53 struct PCIHostBridgeClass {
  54     SysBusDeviceClass parent_class;
  55
  56     const char *(*root_bus_path)(PCIHostState *, PCIBus *);
  57 };
  58
  59 /* common internal helpers for PCI/PCIe hosts, cut off overflows */
  60 void pci_host_config_write_common(PCIDevice *pci_dev, uint32_t addr,
  61                                   uint32_t limit, uint32_t val, uint32_t len);
  62 uint32_t pci_host_config_read_common(PCIDevice *pci_dev, uint32_t addr,
  63                                      uint32_t limit, uint32_t len);
  64
  65 void pci_data_write(PCIBus *s, uint32_t addr, uint32_t val, unsigned len);
  66 uint32_t pci_data_read(PCIBus *s, uint32_t addr, unsigned len);
  67
  68 extern const MemoryRegionOps pci_host_conf_le_ops;
  69 extern const MemoryRegionOps pci_host_conf_be_ops;
  70 extern const MemoryRegionOps pci_host_data_le_ops;
  71 extern const MemoryRegionOps pci_host_data_be_ops;
  72
  73 #endif /* PCI_HOST_H */