1 /* 2 * QEMU PCI bridge 3 * 4 * Copyright (c) 2004 Fabrice Bellard 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License as published by 8 * the Free Software Foundation; either version 2 of the License, or 9 * (at your option) any later version. 10 * 11 * This program is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 * GNU General Public License for more details. 15 * 16 * You should have received a copy of the GNU General Public License 17 * along with this program; if not, write to the Free Software 18 * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. 19 * 20 * split out pci bus specific stuff from pci.[hc] to pci_bridge.[hc] 21 * Copyright (c) 2009 Isaku Yamahata <yamahata at valinux co jp> 22 * VA Linux Systems Japan K.K. 23 * 24 */ 25 26 #ifndef QEMU_PCI_BRIDGE_H 27 #define QEMU_PCI_BRIDGE_H 28 29 #include "hw/pci/pci.h" 30 #include "hw/pci/pci_bus.h" 31 32 typedef struct PCIBridgeWindows PCIBridgeWindows; 33 34 /* 35 * Aliases for each of the address space windows that the bridge 36 * can forward. Mapped into the bridge's parent's address space, 37 * as subregions. 38 */ 39 struct PCIBridgeWindows { 40 MemoryRegion alias_pref_mem; 41 MemoryRegion alias_mem; 42 MemoryRegion alias_io; 43 /* 44 * When bridge control VGA forwarding is enabled, bridges will 45 * provide positive decode on the PCI VGA defined I/O port and 46 * MMIO ranges. When enabled forwarding is only qualified on the 47 * I/O and memory enable bits in the bridge command register. 48 */ 49 MemoryRegion alias_vga[QEMU_PCI_VGA_NUM_REGIONS]; 50 }; 51 52 #define TYPE_PCI_BRIDGE "base-pci-bridge" 53 #define PCI_BRIDGE(obj) OBJECT_CHECK(PCIBridge, (obj), TYPE_PCI_BRIDGE) 54 55 struct PCIBridge { 56 /*< private >*/ 57 PCIDevice parent_obj; 58 /*< public >*/ 59 60 /* private member */ 61 PCIBus sec_bus; 62 /* 63 * Memory regions for the bridge's address spaces. These regions are not 64 * directly added to system_memory/system_io or its descendants. 65 * Bridge's secondary bus points to these, so that devices 66 * under the bridge see these regions as its address spaces. 67 * The regions are as large as the entire address space - 68 * they don't take into account any windows. 69 */ 70 MemoryRegion address_space_mem; 71 MemoryRegion address_space_io; 72 73 PCIBridgeWindows *windows; 74 75 pci_map_irq_fn map_irq; 76 const char *bus_name; 77 }; 78 79 #define PCI_BRIDGE_DEV_PROP_CHASSIS_NR "chassis_nr" 80 #define PCI_BRIDGE_DEV_PROP_MSI "msi" 81 #define PCI_BRIDGE_DEV_PROP_SHPC "shpc" 82 83 int pci_bridge_ssvid_init(PCIDevice *dev, uint8_t offset, 84 uint16_t svid, uint16_t ssid, 85 Error **errp); 86 87 PCIDevice *pci_bridge_get_device(PCIBus *bus); 88 PCIBus *pci_bridge_get_sec_bus(PCIBridge *br); 89 90 pcibus_t pci_bridge_get_base(const PCIDevice *bridge, uint8_t type); 91 pcibus_t pci_bridge_get_limit(const PCIDevice *bridge, uint8_t type); 92 93 void pci_bridge_update_mappings(PCIBridge *br); 94 void pci_bridge_write_config(PCIDevice *d, 95 uint32_t address, uint32_t val, int len); 96 void pci_bridge_disable_base_limit(PCIDevice *dev); 97 void pci_bridge_reset(DeviceState *qdev); 98 99 void pci_bridge_initfn(PCIDevice *pci_dev, const char *typename); 100 void pci_bridge_exitfn(PCIDevice *pci_dev); 101 102 103 /* 104 * before qdev initialization(qdev_init()), this function sets bus_name and 105 * map_irq callback which are necessry for pci_bridge_initfn() to 106 * initialize bus. 107 */ 108 void pci_bridge_map_irq(PCIBridge *br, const char* bus_name, 109 pci_map_irq_fn map_irq); 110 111 /* TODO: add this define to pci_regs.h in linux and then in qemu. */ 112 #define PCI_BRIDGE_CTL_VGA_16BIT 0x10 /* VGA 16-bit decode */ 113 #define PCI_BRIDGE_CTL_DISCARD 0x100 /* Primary discard timer */ 114 #define PCI_BRIDGE_CTL_SEC_DISCARD 0x200 /* Secondary discard timer */ 115 #define PCI_BRIDGE_CTL_DISCARD_STATUS 0x400 /* Discard timer status */ 116 #define PCI_BRIDGE_CTL_DISCARD_SERR 0x800 /* Discard timer SERR# enable */ 117 118 typedef struct PCIBridgeQemuCap { 119 uint8_t id; /* Standard PCI capability header field */ 120 uint8_t next; /* Standard PCI capability header field */ 121 uint8_t len; /* Standard PCI vendor-specific capability header field */ 122 uint8_t type; /* Red Hat vendor-specific capability type. 123 Types are defined with REDHAT_PCI_CAP_ prefix */ 124 125 uint32_t bus_res; /* Minimum number of buses to reserve */ 126 uint64_t io; /* IO space to reserve */ 127 uint32_t mem; /* Non-prefetchable memory to reserve */ 128 /* At most one of the following two fields may be set to a value 129 * different from -1 */ 130 uint32_t mem_pref_32; /* Prefetchable memory to reserve (32-bit MMIO) */ 131 uint64_t mem_pref_64; /* Prefetchable memory to reserve (64-bit MMIO) */ 132 } PCIBridgeQemuCap; 133 134 #define REDHAT_PCI_CAP_RESOURCE_RESERVE 1 135 136 /* 137 * PCI BUS/IO/MEM/PREFMEM additional resources recorded as a 138 * capability in PCI configuration space to reserve on firmware init. 139 */ 140 typedef struct PCIResReserve { 141 uint32_t bus; 142 uint64_t io; 143 uint64_t mem_non_pref; 144 uint64_t mem_pref_32; 145 uint64_t mem_pref_64; 146 } PCIResReserve; 147 148 int pci_bridge_qemu_reserve_cap_init(PCIDevice *dev, int cap_offset, 149 PCIResReserve res_reserve, Error **errp); 150 151 #endif /* QEMU_PCI_BRIDGE_H */ 152