Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/dev/isci/isci_oem_parameters.c
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1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * BSD LICENSE 5 * 6 * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved. 7 * All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 13 * * Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * * Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in 17 * the documentation and/or other materials provided with the 18 * distribution. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 21 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 23 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 24 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 25 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 26 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 27 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 28 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 29 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 30 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 #include <sys/cdefs.h> 34 __FBSDID("$FreeBSD$"); 35 36 #include <dev/isci/isci.h> 37 #include <vm/vm.h> 38 #include <vm/pmap.h> 39 #include <machine/vmparam.h> 40 #include <machine/pc/bios.h> 41 #include <dev/isci/scil/scu_bios_definitions.h> 42 43 struct pcir_header 44 { 45 uint32_t signature; 46 uint16_t vendor_id; 47 uint16_t device_id; 48 uint16_t reserved; 49 uint16_t struct_length; 50 uint8_t struct_revision; 51 uint8_t cc_interface; 52 uint8_t cc_subclass; 53 uint8_t cc_baseclass; 54 uint16_t image_length; 55 uint16_t code_revision; 56 uint8_t code_type; 57 uint8_t indicator; 58 uint16_t reserved1; 59 }; 60 61 struct rom_header 62 { 63 uint8_t signature_byte[2]; 64 uint8_t rom_length; 65 uint8_t jmp_code; 66 uint16_t entry_address; 67 uint8_t reserved[0x12]; 68 uint16_t pcir_pointer; 69 uint16_t pnp_pointer; 70 }; 71 72 struct oem_parameters_table 73 { 74 uint8_t signature[4]; /* "$OEM" */ 75 struct revision 76 { 77 uint16_t major:8; /* bits [7:0] */ 78 uint16_t minor:8; /* bits [8:15] */ 79 } revision; 80 81 uint16_t length; 82 uint8_t checksum; 83 uint8_t reserved1; 84 uint16_t reserved2; 85 uint8_t data[1]; 86 }; 87 88 void 89 isci_get_oem_parameters(struct isci_softc *isci) 90 { 91 uint32_t OROM_PHYSICAL_ADDRESS_START = 0xC0000; 92 uint32_t OROM_SEARCH_LENGTH = 0x30000; 93 uint16_t OROM_SIGNATURE = 0xAA55; 94 uint32_t OROM_SIZE = 512; 95 uint8_t *orom_start = 96 (uint8_t *)BIOS_PADDRTOVADDR(OROM_PHYSICAL_ADDRESS_START); 97 uint32_t offset = 0; 98 99 while (offset < OROM_SEARCH_LENGTH) { 100 101 /* Look for the OROM signature at the beginning of every 102 * 512-byte block in the OROM region 103 */ 104 if (*(uint16_t*)(orom_start + offset) == OROM_SIGNATURE) { 105 uint32_t *rom; 106 struct rom_header *rom_header; 107 struct pcir_header *pcir_header; 108 uint16_t vendor_id = isci->pci_common_header.vendor_id; 109 uint16_t device_id = isci->pci_common_header.device_id; 110 111 rom = (uint32_t *)(orom_start + offset); 112 rom_header = (struct rom_header *)rom; 113 pcir_header = (struct pcir_header *) 114 ((uint8_t*)rom + rom_header->pcir_pointer); 115 116 /* OROM signature was found. Now check if the PCI 117 * device and vendor IDs match. 118 */ 119 if (pcir_header->vendor_id == vendor_id && 120 pcir_header->device_id == device_id) 121 { 122 /* OROM for this PCI device was found. Search 123 * this 512-byte block for the $OEM string, 124 * which will mark the beginning of the OEM 125 * parameter block. 126 */ 127 uint8_t oem_sig[4] = {'$', 'O', 'E', 'M'}; 128 int dword_index; 129 130 for (dword_index = 0; 131 dword_index < OROM_SIZE/sizeof(uint32_t); 132 dword_index++) 133 if (rom[dword_index] == *(uint32_t *)oem_sig) { 134 /* $OEM signature string was found. Now copy the OEM parameter block 135 * into the struct ISCI_CONTROLLER objects. After the controllers are 136 * constructed, we will pass this OEM parameter data to the SCI core 137 * controller. 138 */ 139 struct oem_parameters_table *oem = 140 (struct oem_parameters_table *)&rom[dword_index]; 141 SCI_BIOS_OEM_PARAM_BLOCK_T *oem_data = 142 (SCI_BIOS_OEM_PARAM_BLOCK_T *)oem->data; 143 int index; 144 145 isci->oem_parameters_found = TRUE; 146 isci_log_message(1, "ISCI", "oem_data->header.num_elements = %d\n", 147 oem_data->header.num_elements); 148 149 for (index = 0; index < oem_data->header.num_elements; index++) 150 { 151 memcpy(&isci->controllers[index].oem_parameters.sds1, 152 &oem_data->controller_element[index], 153 sizeof(SCIC_SDS_OEM_PARAMETERS_T)); 154 155 isci_log_message(1, "ISCI", "OEM Parameter Data for controller %d\n", 156 index); 157 158 for (int i = 0; i < sizeof(SCIC_SDS_OEM_PARAMETERS_T); i++) { 159 uint8_t val = ((uint8_t *)&oem_data->controller_element[index])[i]; 160 isci_log_message(1, "ISCI", "%02x ", val); 161 } 162 isci_log_message(1, "ISCI", "\n"); 163 isci->controllers[index].oem_parameters_version = oem_data->header.version; 164 } 165 } 166 167 /* No need to continue searching for another 168 * OROM that matches this PCI device, so return 169 * immediately. 170 */ 171 return; 172 } 173 } 174 175 offset += OROM_SIZE; 176 } 177 }
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