1 /* 2 * Copyright 2020 Google Inc. 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #pragma once 18 19 #include "data.hpp" 20 #include "internal/sys.hpp" 21 #include "pciaccess.hpp" 22 23 #include <linux/pci_regs.h> 24 25 #include <stdplus/types.hpp> 26 27 // Some versions of the linux/pci_regs.h header don't define this 28 #ifndef PCI_STD_NUM_BARS 29 #define PCI_STD_NUM_BARS 6 30 #endif // !PCI_STD_NUM_BARS 31 32 namespace host_tool 33 { 34 35 class PciBridgeIntf 36 { 37 public: 38 virtual ~PciBridgeIntf() = default; 39 40 virtual void write(const stdplus::span<const std::uint8_t> data) = 0; 41 virtual void configure(const ipmi_flash::PciConfigResponse& config) = 0; 42 43 virtual std::size_t getDataLength() = 0; 44 }; 45 46 class PciAccessBridge : public PciBridgeIntf 47 { 48 public: 49 virtual ~PciAccessBridge(); 50 51 virtual void write(const stdplus::span<const std::uint8_t> data) override; 52 virtual void configure(const ipmi_flash::PciConfigResponse&) override{}; 53 54 std::size_t getDataLength() override 55 { 56 return dataLength; 57 } 58 59 protected: 60 /** 61 * Finds the PCI device matching @a match and saves a reference to it in @a 62 * dev. Also maps the memory region described in BAR number @a bar to 63 * address @a addr, 64 */ 65 PciAccessBridge(const struct pci_id_match* match, int bar, 66 std::size_t dataOffset, std::size_t dataLength, 67 const PciAccess* pci); 68 69 struct pci_device* dev = nullptr; 70 std::uint8_t* addr = nullptr; 71 std::size_t size = 0; 72 73 private: 74 std::size_t dataOffset; 75 std::size_t dataLength; 76 77 protected: 78 const PciAccess* pci; 79 }; 80 81 class NuvotonPciBridge : public PciAccessBridge 82 { 83 public: 84 explicit NuvotonPciBridge(const PciAccess* pciAccess, 85 bool skipBridgeDisable = false) : 86 PciAccessBridge(&match, bar, dataOffset, dataLength, pciAccess), 87 skipBridgeDisable(skipBridgeDisable) 88 { 89 enableBridge(); 90 } 91 92 ~NuvotonPciBridge() 93 { 94 if (!skipBridgeDisable) 95 disableBridge(); 96 } 97 98 private: 99 static constexpr std::uint32_t vid = 0x1050; 100 static constexpr std::uint32_t did = 0x0750; 101 static constexpr int bar = 0; 102 static constexpr struct pci_id_match match 103 { 104 vid, did, PCI_MATCH_ANY, PCI_MATCH_ANY, 0, 0, 0 105 }; 106 107 static constexpr pciaddr_t bridge = 0x04; 108 static constexpr std::uint8_t bridgeEnabled = 0x02; 109 110 static constexpr std::size_t dataOffset = 0x0; 111 static constexpr std::size_t dataLength = 0x4000; 112 113 void enableBridge(); 114 void disableBridge(); 115 116 bool skipBridgeDisable; 117 }; 118 119 class AspeedPciBridge : public PciAccessBridge 120 { 121 public: 122 explicit AspeedPciBridge(const PciAccess* pciAccess, 123 bool skipBridgeDisable = false) : 124 PciAccessBridge(&match, bar, dataOffset, dataLength, pciAccess), 125 skipBridgeDisable(skipBridgeDisable) 126 { 127 enableBridge(); 128 } 129 130 ~AspeedPciBridge() 131 { 132 if (!skipBridgeDisable) 133 disableBridge(); 134 } 135 136 void configure(const ipmi_flash::PciConfigResponse& configResp) override; 137 138 private: 139 static constexpr std::uint32_t vid = 0x1a03; 140 static constexpr std::uint32_t did = 0x2000; 141 static constexpr int bar = 1; 142 static constexpr struct pci_id_match match 143 { 144 vid, did, PCI_MATCH_ANY, PCI_MATCH_ANY, 0, 0, 0 145 }; 146 147 static constexpr std::size_t config = 0x0f000; 148 static constexpr std::size_t bridge = 0x0f004; 149 static constexpr std::uint32_t bridgeEnabled = 0x1; 150 151 static constexpr std::size_t dataOffset = 0x10000; 152 static constexpr std::size_t dataLength = 0x10000; 153 154 void enableBridge(); 155 void disableBridge(); 156 157 bool skipBridgeDisable; 158 }; 159 160 } // namespace host_tool 161