1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 /* 22 * Copyright 2008 Sun Microsystems, Inc. All rights reserved. 23 * Use is subject to license terms. 24 * Copyright 2022 Oxide Computer Company 25 */ 26 27 /* 28 * Determine the PCI configuration mechanism recommended by the BIOS. 29 */ 30 31 #include <sys/types.h> 32 #include <sys/sunddi.h> 33 #include <sys/pci_impl.h> 34 #include <sys/ddi_subrdefs.h> 35 #include <sys/bootconf.h> 36 #include <sys/psw.h> 37 #include <sys/modctl.h> 38 #include <sys/errno.h> 39 #include <sys/pci.h> 40 #include <sys/pci_cfgspace.h> 41 #include <sys/reboot.h> 42 #include <sys/pci_cfgspace_impl.h> 43 #include <sys/mutex.h> 44 #include <sys/plat/pci_prd.h> 45 46 extern int pci_boot_debug; 47 extern int pci_boot_maxbus; 48 49 /* 50 * Interface routines 51 */ 52 void pci_enumerate(int); 53 void pci_setup_tree(void); 54 void pci_reprogram(void); 55 dev_info_t *pci_boot_bus_to_dip(uint32_t); 56 57 static struct modlmisc modlmisc = { 58 &mod_miscops, "PCI BIOS interface" 59 }; 60 61 static struct modlinkage modlinkage = { 62 MODREV_1, (void *)&modlmisc, NULL 63 }; 64 65 static pci_prd_upcalls_t pci_upcalls = { 66 .pru_bus2dip_f = pci_boot_bus_to_dip 67 }; 68 69 int 70 _init(void) 71 { 72 int err; 73 74 if ((err = pci_prd_init(&pci_upcalls)) != 0) { 75 return (err); 76 } 77 78 if ((err = mod_install(&modlinkage)) != 0) { 79 pci_prd_fini(); 80 return (err); 81 } 82 83 impl_bus_add_probe(pci_enumerate); 84 return (0); 85 } 86 87 int 88 _fini(void) 89 { 90 int err; 91 92 if ((err = mod_remove(&modlinkage)) != 0) 93 return (err); 94 95 impl_bus_delete_probe(pci_enumerate); 96 pci_prd_fini(); 97 return (0); 98 } 99 100 int 101 _info(struct modinfo *modinfop) 102 { 103 return (mod_info(&modlinkage, modinfop)); 104 } 105 106 107 /* 108 * This function is invoked twice: first time, with reprogram=0 to 109 * set up the PCI portion of the device tree. The second time is 110 * for reprogramming devices not set up by the BIOS. 111 */ 112 void 113 pci_enumerate(int reprogram) 114 { 115 extern void add_pci_fixes(void); 116 extern void undo_pci_fixes(void); 117 118 /* 119 * On our first pass through here actually determine what the maximum 120 * bus that we should use is. 121 */ 122 if (reprogram == 0) { 123 pci_boot_maxbus = pci_prd_max_bus(); 124 } 125 126 add_pci_fixes(); 127 128 if (reprogram) { 129 pci_reprogram(); 130 undo_pci_fixes(); 131 return; 132 } 133 134 /* setup device tree */ 135 pci_setup_tree(); 136 undo_pci_fixes(); 137 } 138