setup-bus.c revision b07f2ebc109b607789f648dedcff4b125f9afec6
11da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 21da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * drivers/pci/setup-bus.c 31da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 41da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Extruded from code written by 51da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Dave Rusling (david.rusling@reo.mts.dec.com) 61da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * David Mosberger (davidm@cs.arizona.edu) 71da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * David Miller (davem@redhat.com) 81da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 91da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Support routines for initializing a PCI subsystem. 101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Nov 2000, Ivan Kokshaysky <ink@jurassic.park.msu.ru> 141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * PCI-PCI bridges cleanup, sorted resource allocation. 151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Feb 2002, Ivan Kokshaysky <ink@jurassic.park.msu.ru> 161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Converted to allocation in 3 passes, which gives 171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * tighter packing. Prefetchable range support. 181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/init.h> 211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/kernel.h> 221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/module.h> 231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/pci.h> 241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/errno.h> 251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/ioport.h> 261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/cache.h> 271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/slab.h> 286faf17f6f1ffc586d16efc2f9fa2083a7785ee74Chris Wright#include "pci.h" 291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 30bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lustruct pci_dev_resource { 31bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu struct list_head list; 322934a0de095f277a7bbc15a72ecf61af31a45163Yinghai Lu struct resource *res; 332934a0de095f277a7bbc15a72ecf61af31a45163Yinghai Lu struct pci_dev *dev; 34568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu resource_size_t start; 35568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu resource_size_t end; 36c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai resource_size_t add_size; 372bbc6942273b5b3097bd265d82227bdd84b351b2Ram Pai resource_size_t min_align; 38568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu unsigned long flags; 39568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu}; 40568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu 41bffc56d41102705d809f88c29918a9c33d2900f7Yinghai Lustatic void free_list(struct list_head *head) 42bffc56d41102705d809f88c29918a9c33d2900f7Yinghai Lu{ 43bffc56d41102705d809f88c29918a9c33d2900f7Yinghai Lu struct pci_dev_resource *dev_res, *tmp; 44bffc56d41102705d809f88c29918a9c33d2900f7Yinghai Lu 45bffc56d41102705d809f88c29918a9c33d2900f7Yinghai Lu list_for_each_entry_safe(dev_res, tmp, head, list) { 46bffc56d41102705d809f88c29918a9c33d2900f7Yinghai Lu list_del(&dev_res->list); 47bffc56d41102705d809f88c29918a9c33d2900f7Yinghai Lu kfree(dev_res); 48bffc56d41102705d809f88c29918a9c33d2900f7Yinghai Lu } 49bffc56d41102705d809f88c29918a9c33d2900f7Yinghai Lu} 50094732a520caae81ae1532af29da82a4fa953472Ram Pai 51c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai/** 52c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * add_to_list() - add a new resource tracker to the list 53c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * @head: Head of the list 54c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * @dev: device corresponding to which the resource 55c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * belongs 56c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * @res: The resource to be tracked 57c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * @add_size: additional size to be optionally added 58c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * to the resource 59c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai */ 60bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lustatic int add_to_list(struct list_head *head, 61c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai struct pci_dev *dev, struct resource *res, 622bbc6942273b5b3097bd265d82227bdd84b351b2Ram Pai resource_size_t add_size, resource_size_t min_align) 63568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu{ 64764242a0aec69e10b8dc0f4f0303a6800b09cf45Yinghai Lu struct pci_dev_resource *tmp; 65568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu 66bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu tmp = kzalloc(sizeof(*tmp), GFP_KERNEL); 67568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu if (!tmp) { 68c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai pr_warning("add_to_list: kmalloc() failed!\n"); 69ef62dfefa93bc90f1cb0f4a55c2d86b3269b3f92Yinghai Lu return -ENOMEM; 70568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu } 71568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu 72568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu tmp->res = res; 73568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu tmp->dev = dev; 74568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu tmp->start = res->start; 75568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu tmp->end = res->end; 76568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu tmp->flags = res->flags; 77c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai tmp->add_size = add_size; 782bbc6942273b5b3097bd265d82227bdd84b351b2Ram Pai tmp->min_align = min_align; 79bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu 80bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu list_add(&tmp->list, head); 81ef62dfefa93bc90f1cb0f4a55c2d86b3269b3f92Yinghai Lu 82ef62dfefa93bc90f1cb0f4a55c2d86b3269b3f92Yinghai Lu return 0; 83568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu} 84568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu 85b9b0bba96cf5acbf025f7829fbf6c09e74323b41Yinghai Lustatic void remove_from_list(struct list_head *head, 863e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu struct resource *res) 873e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu{ 88b9b0bba96cf5acbf025f7829fbf6c09e74323b41Yinghai Lu struct pci_dev_resource *dev_res, *tmp; 893e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu 90b9b0bba96cf5acbf025f7829fbf6c09e74323b41Yinghai Lu list_for_each_entry_safe(dev_res, tmp, head, list) { 91b9b0bba96cf5acbf025f7829fbf6c09e74323b41Yinghai Lu if (dev_res->res == res) { 92b9b0bba96cf5acbf025f7829fbf6c09e74323b41Yinghai Lu list_del(&dev_res->list); 93b9b0bba96cf5acbf025f7829fbf6c09e74323b41Yinghai Lu kfree(dev_res); 94bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu break; 953e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu } 963e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu } 973e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu} 983e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu 99b9b0bba96cf5acbf025f7829fbf6c09e74323b41Yinghai Lustatic resource_size_t get_res_add_size(struct list_head *head, 1001c372353e9c681b127f21030f8a0f0c2afd82429Yinghai Lu struct resource *res) 1011c372353e9c681b127f21030f8a0f0c2afd82429Yinghai Lu{ 102b9b0bba96cf5acbf025f7829fbf6c09e74323b41Yinghai Lu struct pci_dev_resource *dev_res; 103bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu 104b9b0bba96cf5acbf025f7829fbf6c09e74323b41Yinghai Lu list_for_each_entry(dev_res, head, list) { 105b9b0bba96cf5acbf025f7829fbf6c09e74323b41Yinghai Lu if (dev_res->res == res) { 106b592443d9045f0880eb4d8cc9125075744db4b9eYinghai Lu int idx = res - &dev_res->dev->resource[0]; 107b592443d9045f0880eb4d8cc9125075744db4b9eYinghai Lu 108b9b0bba96cf5acbf025f7829fbf6c09e74323b41Yinghai Lu dev_printk(KERN_DEBUG, &dev_res->dev->dev, 109b592443d9045f0880eb4d8cc9125075744db4b9eYinghai Lu "res[%d]=%pR get_res_add_size add_size %llx\n", 110b592443d9045f0880eb4d8cc9125075744db4b9eYinghai Lu idx, dev_res->res, 111b9b0bba96cf5acbf025f7829fbf6c09e74323b41Yinghai Lu (unsigned long long)dev_res->add_size); 112b592443d9045f0880eb4d8cc9125075744db4b9eYinghai Lu 113b9b0bba96cf5acbf025f7829fbf6c09e74323b41Yinghai Lu return dev_res->add_size; 114bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu } 1153e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu } 1161c372353e9c681b127f21030f8a0f0c2afd82429Yinghai Lu 1171c372353e9c681b127f21030f8a0f0c2afd82429Yinghai Lu return 0; 1181c372353e9c681b127f21030f8a0f0c2afd82429Yinghai Lu} 1191c372353e9c681b127f21030f8a0f0c2afd82429Yinghai Lu 12078c3b329b9dd7097781cb900146e503e499cccfeYinghai Lu/* Sort resources by alignment */ 121bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lustatic void pdev_sort_resources(struct pci_dev *dev, struct list_head *head) 12278c3b329b9dd7097781cb900146e503e499cccfeYinghai Lu{ 12378c3b329b9dd7097781cb900146e503e499cccfeYinghai Lu int i; 12478c3b329b9dd7097781cb900146e503e499cccfeYinghai Lu 12578c3b329b9dd7097781cb900146e503e499cccfeYinghai Lu for (i = 0; i < PCI_NUM_RESOURCES; i++) { 12678c3b329b9dd7097781cb900146e503e499cccfeYinghai Lu struct resource *r; 127bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu struct pci_dev_resource *dev_res, *tmp; 12878c3b329b9dd7097781cb900146e503e499cccfeYinghai Lu resource_size_t r_align; 129bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu struct list_head *n; 13078c3b329b9dd7097781cb900146e503e499cccfeYinghai Lu 13178c3b329b9dd7097781cb900146e503e499cccfeYinghai Lu r = &dev->resource[i]; 13278c3b329b9dd7097781cb900146e503e499cccfeYinghai Lu 13378c3b329b9dd7097781cb900146e503e499cccfeYinghai Lu if (r->flags & IORESOURCE_PCI_FIXED) 13478c3b329b9dd7097781cb900146e503e499cccfeYinghai Lu continue; 13578c3b329b9dd7097781cb900146e503e499cccfeYinghai Lu 13678c3b329b9dd7097781cb900146e503e499cccfeYinghai Lu if (!(r->flags) || r->parent) 13778c3b329b9dd7097781cb900146e503e499cccfeYinghai Lu continue; 13878c3b329b9dd7097781cb900146e503e499cccfeYinghai Lu 13978c3b329b9dd7097781cb900146e503e499cccfeYinghai Lu r_align = pci_resource_alignment(dev, r); 14078c3b329b9dd7097781cb900146e503e499cccfeYinghai Lu if (!r_align) { 14178c3b329b9dd7097781cb900146e503e499cccfeYinghai Lu dev_warn(&dev->dev, "BAR %d: %pR has bogus alignment\n", 14278c3b329b9dd7097781cb900146e503e499cccfeYinghai Lu i, r); 14378c3b329b9dd7097781cb900146e503e499cccfeYinghai Lu continue; 14478c3b329b9dd7097781cb900146e503e499cccfeYinghai Lu } 14578c3b329b9dd7097781cb900146e503e499cccfeYinghai Lu 146bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu tmp = kzalloc(sizeof(*tmp), GFP_KERNEL); 147bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu if (!tmp) 148bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu panic("pdev_sort_resources(): " 149bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu "kmalloc() failed!\n"); 150bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu tmp->res = r; 151bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu tmp->dev = dev; 152bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu 153bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu /* fallback is smallest one or list is empty*/ 154bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu n = head; 155bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu list_for_each_entry(dev_res, head, list) { 156bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu resource_size_t align; 157bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu 158bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu align = pci_resource_alignment(dev_res->dev, 159bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu dev_res->res); 16078c3b329b9dd7097781cb900146e503e499cccfeYinghai Lu 16178c3b329b9dd7097781cb900146e503e499cccfeYinghai Lu if (r_align > align) { 162bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu n = &dev_res->list; 16378c3b329b9dd7097781cb900146e503e499cccfeYinghai Lu break; 16478c3b329b9dd7097781cb900146e503e499cccfeYinghai Lu } 16578c3b329b9dd7097781cb900146e503e499cccfeYinghai Lu } 166bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu /* Insert it just before n*/ 167bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu list_add_tail(&tmp->list, n); 16878c3b329b9dd7097781cb900146e503e499cccfeYinghai Lu } 16978c3b329b9dd7097781cb900146e503e499cccfeYinghai Lu} 17078c3b329b9dd7097781cb900146e503e499cccfeYinghai Lu 1716841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lustatic void __dev_sort_resources(struct pci_dev *dev, 172bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu struct list_head *head) 1731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1746841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu u16 class = dev->class >> 8; 1751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1766841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu /* Don't touch classless devices or host bridges or ioapics. */ 1776841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu if (class == PCI_CLASS_NOT_DEFINED || class == PCI_CLASS_BRIDGE_HOST) 1786841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu return; 1791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1806841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu /* Don't touch ioapic devices already enabled by firmware */ 1816841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu if (class == PCI_CLASS_SYSTEM_PIC) { 1826841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu u16 command; 1836841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu pci_read_config_word(dev, PCI_COMMAND, &command); 1846841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu if (command & (PCI_COMMAND_IO | PCI_COMMAND_MEMORY)) 1856841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu return; 1866841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu } 1871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1886841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu pdev_sort_resources(dev, head); 1896841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu} 19023186279658cea6d42a050400d3e79c56cb459b4Satoru Takeuchi 191fc075e1da1b96ef65c32e83648055606b8204b58Ram Paistatic inline void reset_resource(struct resource *res) 192fc075e1da1b96ef65c32e83648055606b8204b58Ram Pai{ 193fc075e1da1b96ef65c32e83648055606b8204b58Ram Pai res->start = 0; 194fc075e1da1b96ef65c32e83648055606b8204b58Ram Pai res->end = 0; 195fc075e1da1b96ef65c32e83648055606b8204b58Ram Pai res->flags = 0; 196fc075e1da1b96ef65c32e83648055606b8204b58Ram Pai} 197fc075e1da1b96ef65c32e83648055606b8204b58Ram Pai 198c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai/** 1999e8bf93a7f416a3fa8fb6d76177d90e67bd45496Ram Pai * reassign_resources_sorted() - satisfy any additional resource requests 200c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * 2019e8bf93a7f416a3fa8fb6d76177d90e67bd45496Ram Pai * @realloc_head : head of the list tracking requests requiring additional 202c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * resources 203c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * @head : head of the list tracking requests with allocated 204c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * resources 205c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * 2069e8bf93a7f416a3fa8fb6d76177d90e67bd45496Ram Pai * Walk through each element of the realloc_head and try to procure 207c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * additional resources for the element, provided the element 208c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * is in the head list. 209c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai */ 210bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lustatic void reassign_resources_sorted(struct list_head *realloc_head, 211bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu struct list_head *head) 2126841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu{ 2136841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu struct resource *res; 214b9b0bba96cf5acbf025f7829fbf6c09e74323b41Yinghai Lu struct pci_dev_resource *add_res, *tmp; 215bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu struct pci_dev_resource *dev_res; 216c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai resource_size_t add_size; 2176841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu int idx; 2181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 219b9b0bba96cf5acbf025f7829fbf6c09e74323b41Yinghai Lu list_for_each_entry_safe(add_res, tmp, realloc_head, list) { 220bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu bool found_match = false; 221bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu 222b9b0bba96cf5acbf025f7829fbf6c09e74323b41Yinghai Lu res = add_res->res; 223c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai /* skip resource that has been reset */ 224c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai if (!res->flags) 225c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai goto out; 226c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai 227c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai /* skip this resource if not found in head list */ 228bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu list_for_each_entry(dev_res, head, list) { 229bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu if (dev_res->res == res) { 230bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu found_match = true; 231bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu break; 232bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu } 233c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai } 234bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu if (!found_match)/* just skip */ 235bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu continue; 236c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai 237b9b0bba96cf5acbf025f7829fbf6c09e74323b41Yinghai Lu idx = res - &add_res->dev->resource[0]; 238b9b0bba96cf5acbf025f7829fbf6c09e74323b41Yinghai Lu add_size = add_res->add_size; 2392bbc6942273b5b3097bd265d82227bdd84b351b2Ram Pai if (!resource_size(res)) { 240b9b0bba96cf5acbf025f7829fbf6c09e74323b41Yinghai Lu res->start = add_res->start; 2412bbc6942273b5b3097bd265d82227bdd84b351b2Ram Pai res->end = res->start + add_size - 1; 242b9b0bba96cf5acbf025f7829fbf6c09e74323b41Yinghai Lu if (pci_assign_resource(add_res->dev, idx)) 243c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai reset_resource(res); 2442bbc6942273b5b3097bd265d82227bdd84b351b2Ram Pai } else { 245b9b0bba96cf5acbf025f7829fbf6c09e74323b41Yinghai Lu resource_size_t align = add_res->min_align; 246b9b0bba96cf5acbf025f7829fbf6c09e74323b41Yinghai Lu res->flags |= add_res->flags & 247bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu (IORESOURCE_STARTALIGN|IORESOURCE_SIZEALIGN); 248b9b0bba96cf5acbf025f7829fbf6c09e74323b41Yinghai Lu if (pci_reassign_resource(add_res->dev, idx, 249bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu add_size, align)) 250b9b0bba96cf5acbf025f7829fbf6c09e74323b41Yinghai Lu dev_printk(KERN_DEBUG, &add_res->dev->dev, 251b592443d9045f0880eb4d8cc9125075744db4b9eYinghai Lu "failed to add %llx res[%d]=%pR\n", 252b592443d9045f0880eb4d8cc9125075744db4b9eYinghai Lu (unsigned long long)add_size, 253b592443d9045f0880eb4d8cc9125075744db4b9eYinghai Lu idx, res); 254c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai } 255c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Paiout: 256b9b0bba96cf5acbf025f7829fbf6c09e74323b41Yinghai Lu list_del(&add_res->list); 257b9b0bba96cf5acbf025f7829fbf6c09e74323b41Yinghai Lu kfree(add_res); 258c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai } 259c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai} 260c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai 261c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai/** 262c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * assign_requested_resources_sorted() - satisfy resource requests 263c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * 264c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * @head : head of the list tracking requests for resources 265c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * @failed_list : head of the list tracking requests that could 266c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * not be allocated 267c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * 268c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * Satisfy resource requests of each element in the list. Add 269c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * requests that could not satisfied to the failed_list. 270c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai */ 271bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lustatic void assign_requested_resources_sorted(struct list_head *head, 272bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu struct list_head *fail_head) 273c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai{ 274c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai struct resource *res; 275bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu struct pci_dev_resource *dev_res; 276c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai int idx; 2779a928660c9dcaff568c9d379655c5aa16fb981f8Yinghai Lu 278bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu list_for_each_entry(dev_res, head, list) { 279bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu res = dev_res->res; 280bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu idx = res - &dev_res->dev->resource[0]; 281bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu if (resource_size(res) && 282bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu pci_assign_resource(dev_res->dev, idx)) { 283bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu if (fail_head && !pci_is_root_bus(dev_res->dev->bus)) { 2849a928660c9dcaff568c9d379655c5aa16fb981f8Yinghai Lu /* 2859a928660c9dcaff568c9d379655c5aa16fb981f8Yinghai Lu * if the failed res is for ROM BAR, and it will 2869a928660c9dcaff568c9d379655c5aa16fb981f8Yinghai Lu * be enabled later, don't add it to the list 2879a928660c9dcaff568c9d379655c5aa16fb981f8Yinghai Lu */ 2889a928660c9dcaff568c9d379655c5aa16fb981f8Yinghai Lu if (!((idx == PCI_ROM_RESOURCE) && 2899a928660c9dcaff568c9d379655c5aa16fb981f8Yinghai Lu (!(res->flags & IORESOURCE_ROM_ENABLE)))) 29067cc7e26a5c46508ee00b9fe169aad833b798025Yinghai Lu add_to_list(fail_head, 29167cc7e26a5c46508ee00b9fe169aad833b798025Yinghai Lu dev_res->dev, res, 29267cc7e26a5c46508ee00b9fe169aad833b798025Yinghai Lu 0 /* dont care */, 29367cc7e26a5c46508ee00b9fe169aad833b798025Yinghai Lu 0 /* dont care */); 2949a928660c9dcaff568c9d379655c5aa16fb981f8Yinghai Lu } 295fc075e1da1b96ef65c32e83648055606b8204b58Ram Pai reset_resource(res); 296542df5de56a23bf2d94b75e2b304ab0e5a5508a8Rajesh Shah } 2971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 2981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 2991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 300bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lustatic void __assign_resources_sorted(struct list_head *head, 301bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu struct list_head *realloc_head, 302bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu struct list_head *fail_head) 303c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai{ 3043e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu /* 3053e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu * Should not assign requested resources at first. 3063e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu * they could be adjacent, so later reassign can not reallocate 3073e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu * them one by one in parent resource window. 3083e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu * Try to assign requested + add_size at begining 3093e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu * if could do that, could get out early. 3103e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu * if could not do that, we still try to assign requested at first, 3113e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu * then try to reassign add_size for some resources. 3123e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu */ 313bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu LIST_HEAD(save_head); 314bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu LIST_HEAD(local_fail_head); 315b9b0bba96cf5acbf025f7829fbf6c09e74323b41Yinghai Lu struct pci_dev_resource *save_res; 316bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu struct pci_dev_resource *dev_res; 3173e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu 3183e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu /* Check if optional add_size is there */ 319bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu if (!realloc_head || list_empty(realloc_head)) 3203e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu goto requested_and_reassign; 3213e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu 3223e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu /* Save original start, end, flags etc at first */ 323bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu list_for_each_entry(dev_res, head, list) { 324bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu if (add_to_list(&save_head, dev_res->dev, dev_res->res, 0, 0)) { 325bffc56d41102705d809f88c29918a9c33d2900f7Yinghai Lu free_list(&save_head); 3263e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu goto requested_and_reassign; 3273e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu } 328bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu } 3293e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu 3303e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu /* Update res in head list with add_size in realloc_head list */ 331bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu list_for_each_entry(dev_res, head, list) 332bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu dev_res->res->end += get_res_add_size(realloc_head, 333bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu dev_res->res); 3343e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu 3353e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu /* Try updated head list with add_size added */ 3363e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu assign_requested_resources_sorted(head, &local_fail_head); 3373e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu 3383e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu /* all assigned with add_size ? */ 339bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu if (list_empty(&local_fail_head)) { 3403e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu /* Remove head list from realloc_head list */ 341bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu list_for_each_entry(dev_res, head, list) 342bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu remove_from_list(realloc_head, dev_res->res); 343bffc56d41102705d809f88c29918a9c33d2900f7Yinghai Lu free_list(&save_head); 344bffc56d41102705d809f88c29918a9c33d2900f7Yinghai Lu free_list(head); 3453e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu return; 3463e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu } 3473e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu 348bffc56d41102705d809f88c29918a9c33d2900f7Yinghai Lu free_list(&local_fail_head); 3493e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu /* Release assigned resource */ 350bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu list_for_each_entry(dev_res, head, list) 351bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu if (dev_res->res->parent) 352bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu release_resource(dev_res->res); 3533e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu /* Restore start/end/flags from saved list */ 354b9b0bba96cf5acbf025f7829fbf6c09e74323b41Yinghai Lu list_for_each_entry(save_res, &save_head, list) { 355b9b0bba96cf5acbf025f7829fbf6c09e74323b41Yinghai Lu struct resource *res = save_res->res; 3563e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu 357b9b0bba96cf5acbf025f7829fbf6c09e74323b41Yinghai Lu res->start = save_res->start; 358b9b0bba96cf5acbf025f7829fbf6c09e74323b41Yinghai Lu res->end = save_res->end; 359b9b0bba96cf5acbf025f7829fbf6c09e74323b41Yinghai Lu res->flags = save_res->flags; 3603e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu } 361bffc56d41102705d809f88c29918a9c33d2900f7Yinghai Lu free_list(&save_head); 3623e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu 3633e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lurequested_and_reassign: 364c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai /* Satisfy the must-have resource requests */ 365c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai assign_requested_resources_sorted(head, fail_head); 366c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai 3670a2daa1cf35004f5adbf4138555cc5669abf3a3eRam Pai /* Try to satisfy any additional optional resource 368c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai requests */ 3699e8bf93a7f416a3fa8fb6d76177d90e67bd45496Ram Pai if (realloc_head) 3709e8bf93a7f416a3fa8fb6d76177d90e67bd45496Ram Pai reassign_resources_sorted(realloc_head, head); 371bffc56d41102705d809f88c29918a9c33d2900f7Yinghai Lu free_list(head); 372c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai} 373c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai 3746841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lustatic void pdev_assign_resources_sorted(struct pci_dev *dev, 375bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu struct list_head *add_head, 376bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu struct list_head *fail_head) 3776841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu{ 378bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu LIST_HEAD(head); 3796841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu 3806841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu __dev_sort_resources(dev, &head); 3818424d7592eab8245b51051ee458e598213bca3b2Yinghai Lu __assign_resources_sorted(&head, add_head, fail_head); 3826841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu 3836841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu} 3846841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu 3856841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lustatic void pbus_assign_resources_sorted(const struct pci_bus *bus, 386bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu struct list_head *realloc_head, 387bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu struct list_head *fail_head) 3886841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu{ 3896841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu struct pci_dev *dev; 390bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu LIST_HEAD(head); 3916841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu 3926841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu list_for_each_entry(dev, &bus->devices, bus_list) 3936841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu __dev_sort_resources(dev, &head); 3946841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu 3959e8bf93a7f416a3fa8fb6d76177d90e67bd45496Ram Pai __assign_resources_sorted(&head, realloc_head, fail_head); 3966841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu} 3976841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu 398b3743fa4442fc172e950ff0eaf6aa96e7d5ce9beDominik Brodowskivoid pci_setup_cardbus(struct pci_bus *bus) 3991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 4001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct pci_dev *bridge = bus->self; 401c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas struct resource *res; 4021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct pci_bus_region region; 4031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 404865df576e8fc70daf297b53e61a4fbefc719d065Bjorn Helgaas dev_info(&bridge->dev, "CardBus bridge to [bus %02x-%02x]\n", 405865df576e8fc70daf297b53e61a4fbefc719d065Bjorn Helgaas bus->secondary, bus->subordinate); 4061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 407c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas res = bus->resource[0]; 408c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas pcibios_resource_to_bus(bridge, ®ion, res); 409c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas if (res->flags & IORESOURCE_IO) { 4101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* 4111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * The IO resource is allocated a range twice as large as it 4121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * would normally need. This allows us to set both IO regs. 4131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 414c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas dev_info(&bridge->dev, " bridge window %pR\n", res); 4151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_write_config_dword(bridge, PCI_CB_IO_BASE_0, 4161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds region.start); 4171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_write_config_dword(bridge, PCI_CB_IO_LIMIT_0, 4181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds region.end); 4191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 4201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 421c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas res = bus->resource[1]; 422c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas pcibios_resource_to_bus(bridge, ®ion, res); 423c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas if (res->flags & IORESOURCE_IO) { 424c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas dev_info(&bridge->dev, " bridge window %pR\n", res); 4251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_write_config_dword(bridge, PCI_CB_IO_BASE_1, 4261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds region.start); 4271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_write_config_dword(bridge, PCI_CB_IO_LIMIT_1, 4281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds region.end); 4291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 4301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 431c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas res = bus->resource[2]; 432c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas pcibios_resource_to_bus(bridge, ®ion, res); 433c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas if (res->flags & IORESOURCE_MEM) { 434c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas dev_info(&bridge->dev, " bridge window %pR\n", res); 4351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_write_config_dword(bridge, PCI_CB_MEMORY_BASE_0, 4361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds region.start); 4371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_write_config_dword(bridge, PCI_CB_MEMORY_LIMIT_0, 4381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds region.end); 4391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 4401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 441c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas res = bus->resource[3]; 442c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas pcibios_resource_to_bus(bridge, ®ion, res); 443c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas if (res->flags & IORESOURCE_MEM) { 444c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas dev_info(&bridge->dev, " bridge window %pR\n", res); 4451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_write_config_dword(bridge, PCI_CB_MEMORY_BASE_1, 4461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds region.start); 4471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_write_config_dword(bridge, PCI_CB_MEMORY_LIMIT_1, 4481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds region.end); 4491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 4501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 451b3743fa4442fc172e950ff0eaf6aa96e7d5ce9beDominik BrodowskiEXPORT_SYMBOL(pci_setup_cardbus); 4521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* Initialize bridges with base/limit values we have collected. 4541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds PCI-to-PCI Bridge Architecture Specification rev. 1.1 (1998) 4551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds requires that if there is no I/O ports or memory behind the 4561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bridge, corresponding range must be turned off by writing base 4571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds value greater than limit to the bridge's base/limit registers. 4581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds Note: care must be taken when updating I/O base/limit registers 4601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds of bridges which support 32-bit I/O. This update requires two 4611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds config space writes, so it's quite possible that an I/O window of 4621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds the bridge will have some undesirable address (e.g. 0) after the 4631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds first write. Ditto 64-bit prefetchable MMIO. */ 4647cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lustatic void pci_setup_bridge_io(struct pci_bus *bus) 4651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 4661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct pci_dev *bridge = bus->self; 467c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas struct resource *res; 4681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct pci_bus_region region; 4697cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu u32 l, io_upper16; 4701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Set up the top and bottom of the PCI I/O segment for this bus. */ 472c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas res = bus->resource[0]; 473c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas pcibios_resource_to_bus(bridge, ®ion, res); 474c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas if (res->flags & IORESOURCE_IO) { 4751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_read_config_dword(bridge, PCI_IO_BASE, &l); 4761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds l &= 0xffff0000; 4771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds l |= (region.start >> 8) & 0x00f0; 4781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds l |= region.end & 0xf000; 4791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Set up upper 16 bits of I/O base/limit. */ 4801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds io_upper16 = (region.end & 0xffff0000) | (region.start >> 16); 481c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas dev_info(&bridge->dev, " bridge window %pR\n", res); 4827cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu } else { 4831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Clear upper 16 bits of I/O base/limit. */ 4841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds io_upper16 = 0; 4851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds l = 0x00f0; 4861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 4871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Temporarily disable the I/O range before updating PCI_IO_BASE. */ 4881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_write_config_dword(bridge, PCI_IO_BASE_UPPER16, 0x0000ffff); 4891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Update lower 16 bits of I/O base/limit. */ 4901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_write_config_dword(bridge, PCI_IO_BASE, l); 4911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Update upper 16 bits of I/O base/limit. */ 4921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_write_config_dword(bridge, PCI_IO_BASE_UPPER16, io_upper16); 4937cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu} 4947cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu 4957cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lustatic void pci_setup_bridge_mmio(struct pci_bus *bus) 4967cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu{ 4977cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu struct pci_dev *bridge = bus->self; 4987cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu struct resource *res; 4997cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu struct pci_bus_region region; 5007cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu u32 l; 5011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5027cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu /* Set up the top and bottom of the PCI Memory segment for this bus. */ 503c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas res = bus->resource[1]; 504c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas pcibios_resource_to_bus(bridge, ®ion, res); 505c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas if (res->flags & IORESOURCE_MEM) { 5061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds l = (region.start >> 16) & 0xfff0; 5071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds l |= region.end & 0xfff00000; 508c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas dev_info(&bridge->dev, " bridge window %pR\n", res); 5097cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu } else { 5101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds l = 0x0000fff0; 5111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 5121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_write_config_dword(bridge, PCI_MEMORY_BASE, l); 5137cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu} 5147cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu 5157cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lustatic void pci_setup_bridge_mmio_pref(struct pci_bus *bus) 5167cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu{ 5177cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu struct pci_dev *bridge = bus->self; 5187cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu struct resource *res; 5197cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu struct pci_bus_region region; 5207cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu u32 l, bu, lu; 5211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Clear out the upper 32 bits of PREF limit. 5231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds If PCI_PREF_BASE_UPPER32 was non-zero, this temporarily 5241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds disables PREF range, which is ok. */ 5251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_write_config_dword(bridge, PCI_PREF_LIMIT_UPPER32, 0); 5261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Set up PREF base/limit. */ 528c40a22e0ce5eb400f27449e59e43d021bee58b8dBenjamin Herrenschmidt bu = lu = 0; 529c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas res = bus->resource[2]; 530c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas pcibios_resource_to_bus(bridge, ®ion, res); 531c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas if (res->flags & IORESOURCE_PREFETCH) { 5321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds l = (region.start >> 16) & 0xfff0; 5331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds l |= region.end & 0xfff00000; 534c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas if (res->flags & IORESOURCE_MEM_64) { 5351f82de10d6b1d845155363c895c552e61b36b51aYinghai Lu bu = upper_32_bits(region.start); 5361f82de10d6b1d845155363c895c552e61b36b51aYinghai Lu lu = upper_32_bits(region.end); 5371f82de10d6b1d845155363c895c552e61b36b51aYinghai Lu } 538c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas dev_info(&bridge->dev, " bridge window %pR\n", res); 5397cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu } else { 5401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds l = 0x0000fff0; 5411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 5421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_write_config_dword(bridge, PCI_PREF_MEMORY_BASE, l); 5431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 54459353ea30e65ab3ae181d6175e3212e1361c3787Alex Williamson /* Set the upper 32 bits of PREF base & limit. */ 54559353ea30e65ab3ae181d6175e3212e1361c3787Alex Williamson pci_write_config_dword(bridge, PCI_PREF_BASE_UPPER32, bu); 54659353ea30e65ab3ae181d6175e3212e1361c3787Alex Williamson pci_write_config_dword(bridge, PCI_PREF_LIMIT_UPPER32, lu); 5477cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu} 5487cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu 5497cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lustatic void __pci_setup_bridge(struct pci_bus *bus, unsigned long type) 5507cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu{ 5517cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu struct pci_dev *bridge = bus->self; 5527cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu 5537cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu dev_info(&bridge->dev, "PCI bridge to [bus %02x-%02x]\n", 5547cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu bus->secondary, bus->subordinate); 5557cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu 5567cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu if (type & IORESOURCE_IO) 5577cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu pci_setup_bridge_io(bus); 5587cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu 5597cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu if (type & IORESOURCE_MEM) 5607cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu pci_setup_bridge_mmio(bus); 5617cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu 5627cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu if (type & IORESOURCE_PREFETCH) 5637cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu pci_setup_bridge_mmio_pref(bus); 5641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_write_config_word(bridge, PCI_BRIDGE_CONTROL, bus->bridge_ctl); 5661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 5671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 568e24442733ee486c99d03fe2ecd98924d1bc14c51Benjamin Herrenschmidtvoid pci_setup_bridge(struct pci_bus *bus) 5697cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu{ 5707cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu unsigned long type = IORESOURCE_IO | IORESOURCE_MEM | 5717cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu IORESOURCE_PREFETCH; 5727cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu 5737cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu __pci_setup_bridge(bus, type); 5747cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu} 5757cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu 5761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* Check whether the bridge supports optional I/O and 5771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds prefetchable memory ranges. If not, the respective 5781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds base/limit registers must be read-only and read as 0. */ 57996bde06a2df1b363206d3cdef53134b84ff37813Sam Ravnborgstatic void pci_bridge_check_ranges(struct pci_bus *bus) 5801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 5811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u16 io; 5821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u32 pmem; 5831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct pci_dev *bridge = bus->self; 5841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct resource *b_res; 5851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds b_res = &bridge->resource[PCI_BRIDGE_RESOURCES]; 5871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds b_res[1].flags |= IORESOURCE_MEM; 5881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_read_config_word(bridge, PCI_IO_BASE, &io); 5901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!io) { 5911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_write_config_word(bridge, PCI_IO_BASE, 0xf0f0); 5921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_read_config_word(bridge, PCI_IO_BASE, &io); 5931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_write_config_word(bridge, PCI_IO_BASE, 0x0); 5941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 5951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (io) 5961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds b_res[0].flags |= IORESOURCE_IO; 5971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* DECchip 21050 pass 2 errata: the bridge may miss an address 5981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds disconnect boundary by one PCI data phase. 5991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds Workaround: do not use prefetching on this device. */ 6001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (bridge->vendor == PCI_VENDOR_ID_DEC && bridge->device == 0x0001) 6011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return; 6021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_read_config_dword(bridge, PCI_PREF_MEMORY_BASE, &pmem); 6031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!pmem) { 6041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_write_config_dword(bridge, PCI_PREF_MEMORY_BASE, 6051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0xfff0fff0); 6061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_read_config_dword(bridge, PCI_PREF_MEMORY_BASE, &pmem); 6071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_write_config_dword(bridge, PCI_PREF_MEMORY_BASE, 0x0); 6081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 6091f82de10d6b1d845155363c895c552e61b36b51aYinghai Lu if (pmem) { 6101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds b_res[2].flags |= IORESOURCE_MEM | IORESOURCE_PREFETCH; 6119958610552c0bd7558b41cb8addbd865587f142aYinghai Lu if ((pmem & PCI_PREF_RANGE_TYPE_MASK) == 6129958610552c0bd7558b41cb8addbd865587f142aYinghai Lu PCI_PREF_RANGE_TYPE_64) { 6131f82de10d6b1d845155363c895c552e61b36b51aYinghai Lu b_res[2].flags |= IORESOURCE_MEM_64; 6149958610552c0bd7558b41cb8addbd865587f142aYinghai Lu b_res[2].flags |= PCI_PREF_RANGE_TYPE_64; 6159958610552c0bd7558b41cb8addbd865587f142aYinghai Lu } 6161f82de10d6b1d845155363c895c552e61b36b51aYinghai Lu } 6171f82de10d6b1d845155363c895c552e61b36b51aYinghai Lu 6181f82de10d6b1d845155363c895c552e61b36b51aYinghai Lu /* double check if bridge does support 64 bit pref */ 6191f82de10d6b1d845155363c895c552e61b36b51aYinghai Lu if (b_res[2].flags & IORESOURCE_MEM_64) { 6201f82de10d6b1d845155363c895c552e61b36b51aYinghai Lu u32 mem_base_hi, tmp; 6211f82de10d6b1d845155363c895c552e61b36b51aYinghai Lu pci_read_config_dword(bridge, PCI_PREF_BASE_UPPER32, 6221f82de10d6b1d845155363c895c552e61b36b51aYinghai Lu &mem_base_hi); 6231f82de10d6b1d845155363c895c552e61b36b51aYinghai Lu pci_write_config_dword(bridge, PCI_PREF_BASE_UPPER32, 6241f82de10d6b1d845155363c895c552e61b36b51aYinghai Lu 0xffffffff); 6251f82de10d6b1d845155363c895c552e61b36b51aYinghai Lu pci_read_config_dword(bridge, PCI_PREF_BASE_UPPER32, &tmp); 6261f82de10d6b1d845155363c895c552e61b36b51aYinghai Lu if (!tmp) 6271f82de10d6b1d845155363c895c552e61b36b51aYinghai Lu b_res[2].flags &= ~IORESOURCE_MEM_64; 6281f82de10d6b1d845155363c895c552e61b36b51aYinghai Lu pci_write_config_dword(bridge, PCI_PREF_BASE_UPPER32, 6291f82de10d6b1d845155363c895c552e61b36b51aYinghai Lu mem_base_hi); 6301f82de10d6b1d845155363c895c552e61b36b51aYinghai Lu } 6311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 6321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* Helper function for sizing routines: find first available 6341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bus resource of a given type. Note: we intentionally skip 6351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds the bus resources which have already been assigned (that is, 6361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds have non-NULL parent resource). */ 63796bde06a2df1b363206d3cdef53134b84ff37813Sam Ravnborgstatic struct resource *find_free_bus_resource(struct pci_bus *bus, unsigned long type) 6381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 6391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int i; 6401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct resource *r; 6411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long type_mask = IORESOURCE_IO | IORESOURCE_MEM | 6421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds IORESOURCE_PREFETCH; 6431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 64489a74ecccd1f78e51faf6287e5c0e93a92ac096eBjorn Helgaas pci_bus_for_each_resource(bus, r, i) { 645299de0343c7d18448a69c635378342e9214b14afIvan Kokshaysky if (r == &ioport_resource || r == &iomem_resource) 646299de0343c7d18448a69c635378342e9214b14afIvan Kokshaysky continue; 64755a1098476619d5d8f4cdae7240ea759274dead7Jesse Barnes if (r && (r->flags & type_mask) == type && !r->parent) 64855a1098476619d5d8f4cdae7240ea759274dead7Jesse Barnes return r; 6491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 6501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return NULL; 6511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 6521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 65313583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Paistatic resource_size_t calculate_iosize(resource_size_t size, 65413583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai resource_size_t min_size, 65513583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai resource_size_t size1, 65613583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai resource_size_t old_size, 65713583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai resource_size_t align) 65813583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai{ 65913583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai if (size < min_size) 66013583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai size = min_size; 66113583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai if (old_size == 1 ) 66213583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai old_size = 0; 66313583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai /* To be fixed in 2.5: we should have sort of HAVE_ISA 66413583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai flag in the struct pci_bus. */ 66513583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai#if defined(CONFIG_ISA) || defined(CONFIG_EISA) 66613583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai size = (size & 0xff) + ((size & ~0xffUL) << 2); 66713583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai#endif 66813583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai size = ALIGN(size + size1, align); 66913583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai if (size < old_size) 67013583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai size = old_size; 67113583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai return size; 67213583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai} 67313583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai 67413583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Paistatic resource_size_t calculate_memsize(resource_size_t size, 67513583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai resource_size_t min_size, 67613583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai resource_size_t size1, 67713583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai resource_size_t old_size, 67813583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai resource_size_t align) 67913583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai{ 68013583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai if (size < min_size) 68113583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai size = min_size; 68213583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai if (old_size == 1 ) 68313583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai old_size = 0; 68413583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai if (size < old_size) 68513583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai size = old_size; 68613583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai size = ALIGN(size + size1, align); 68713583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai return size; 68813583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai} 68913583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai 690c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai/** 691c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * pbus_size_io() - size the io window of a given bus 692c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * 693c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * @bus : the bus 694c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * @min_size : the minimum io window that must to be allocated 695c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * @add_size : additional optional io window 6969e8bf93a7f416a3fa8fb6d76177d90e67bd45496Ram Pai * @realloc_head : track the additional io window on this list 697c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * 698c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * Sizing the IO windows of the PCI-PCI bridge is trivial, 699c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * since these windows have 4K granularity and the IO ranges 700c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * of non-bridge PCI devices are limited to 256 bytes. 701c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * We must be careful with the ISA aliasing though. 702c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai */ 703c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Paistatic void pbus_size_io(struct pci_bus *bus, resource_size_t min_size, 704bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu resource_size_t add_size, struct list_head *realloc_head) 7051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 7061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct pci_dev *dev; 7071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct resource *b_res = find_free_bus_resource(bus, IORESOURCE_IO); 708c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai unsigned long size = 0, size0 = 0, size1 = 0; 709be768912a49b10b68e96fbd8fa3cab0adfbd3091Yinghai Lu resource_size_t children_add_size = 0; 7101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!b_res) 7121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return; 7131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds list_for_each_entry(dev, &bus->devices, bus_list) { 7151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int i; 7161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (i = 0; i < PCI_NUM_RESOURCES; i++) { 7181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct resource *r = &dev->resource[i]; 7191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long r_size; 7201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (r->parent || !(r->flags & IORESOURCE_IO)) 7221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds continue; 723022edd86d7c864bc8fadc3c8ac4e6a464472ab05Zhao, Yu r_size = resource_size(r); 7241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (r_size < 0x400) 7261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Might be re-aligned for ISA */ 7271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds size += r_size; 7281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 7291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds size1 += r_size; 730be768912a49b10b68e96fbd8fa3cab0adfbd3091Yinghai Lu 7319e8bf93a7f416a3fa8fb6d76177d90e67bd45496Ram Pai if (realloc_head) 7329e8bf93a7f416a3fa8fb6d76177d90e67bd45496Ram Pai children_add_size += get_res_add_size(realloc_head, r); 7331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 7341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 735c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai size0 = calculate_iosize(size, min_size, size1, 736c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai resource_size(b_res), 4096); 737be768912a49b10b68e96fbd8fa3cab0adfbd3091Yinghai Lu if (children_add_size > add_size) 738be768912a49b10b68e96fbd8fa3cab0adfbd3091Yinghai Lu add_size = children_add_size; 7399e8bf93a7f416a3fa8fb6d76177d90e67bd45496Ram Pai size1 = (!realloc_head || (realloc_head && !add_size)) ? size0 : 740a4ac9fea016fc5c09227eb479bd35e34978323a4Yinghai Lu calculate_iosize(size, min_size, add_size + size1, 74113583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai resource_size(b_res), 4096); 742c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai if (!size0 && !size1) { 743865df576e8fc70daf297b53e61a4fbefc719d065Bjorn Helgaas if (b_res->start || b_res->end) 744865df576e8fc70daf297b53e61a4fbefc719d065Bjorn Helgaas dev_info(&bus->self->dev, "disabling bridge window " 745865df576e8fc70daf297b53e61a4fbefc719d065Bjorn Helgaas "%pR to [bus %02x-%02x] (unused)\n", b_res, 746865df576e8fc70daf297b53e61a4fbefc719d065Bjorn Helgaas bus->secondary, bus->subordinate); 7471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds b_res->flags = 0; 7481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return; 7491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 7501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Alignment of the IO window is always 4K */ 7511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds b_res->start = 4096; 752c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai b_res->end = b_res->start + size0 - 1; 753884525655d07fdee9245716b998ecdc45cdd8007Ivan Kokshaysky b_res->flags |= IORESOURCE_STARTALIGN; 754b592443d9045f0880eb4d8cc9125075744db4b9eYinghai Lu if (size1 > size0 && realloc_head) { 7559e8bf93a7f416a3fa8fb6d76177d90e67bd45496Ram Pai add_to_list(realloc_head, bus->self, b_res, size1-size0, 4096); 756b592443d9045f0880eb4d8cc9125075744db4b9eYinghai Lu dev_printk(KERN_DEBUG, &bus->self->dev, "bridge window " 757b592443d9045f0880eb4d8cc9125075744db4b9eYinghai Lu "%pR to [bus %02x-%02x] add_size %lx\n", b_res, 758b592443d9045f0880eb4d8cc9125075744db4b9eYinghai Lu bus->secondary, bus->subordinate, size1-size0); 759b592443d9045f0880eb4d8cc9125075744db4b9eYinghai Lu } 7601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 7611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 762c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai/** 763c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * pbus_size_mem() - size the memory window of a given bus 764c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * 765c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * @bus : the bus 766c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * @min_size : the minimum memory window that must to be allocated 767c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * @add_size : additional optional memory window 7689e8bf93a7f416a3fa8fb6d76177d90e67bd45496Ram Pai * @realloc_head : track the additional memory window on this list 769c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * 770c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * Calculate the size of the bus and minimal alignment which 771c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * guarantees that all child resources fit in this size. 772c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai */ 77328760489a3f1e136c5ae8581c0fa8f63511f2f4cEric W. Biedermanstatic int pbus_size_mem(struct pci_bus *bus, unsigned long mask, 774c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai unsigned long type, resource_size_t min_size, 775c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai resource_size_t add_size, 776bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu struct list_head *realloc_head) 7771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 7781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct pci_dev *dev; 779c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai resource_size_t min_align, align, size, size0, size1; 780c40a22e0ce5eb400f27449e59e43d021bee58b8dBenjamin Herrenschmidt resource_size_t aligns[12]; /* Alignments from 1Mb to 2Gb */ 7811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int order, max_order; 7821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct resource *b_res = find_free_bus_resource(bus, type); 7831f82de10d6b1d845155363c895c552e61b36b51aYinghai Lu unsigned int mem64_mask = 0; 784be768912a49b10b68e96fbd8fa3cab0adfbd3091Yinghai Lu resource_size_t children_add_size = 0; 7851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!b_res) 7871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 7881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds memset(aligns, 0, sizeof(aligns)); 7901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds max_order = 0; 7911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds size = 0; 7921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7931f82de10d6b1d845155363c895c552e61b36b51aYinghai Lu mem64_mask = b_res->flags & IORESOURCE_MEM_64; 7941f82de10d6b1d845155363c895c552e61b36b51aYinghai Lu b_res->flags &= ~IORESOURCE_MEM_64; 7951f82de10d6b1d845155363c895c552e61b36b51aYinghai Lu 7961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds list_for_each_entry(dev, &bus->devices, bus_list) { 7971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int i; 7981f82de10d6b1d845155363c895c552e61b36b51aYinghai Lu 7991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (i = 0; i < PCI_NUM_RESOURCES; i++) { 8001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct resource *r = &dev->resource[i]; 801c40a22e0ce5eb400f27449e59e43d021bee58b8dBenjamin Herrenschmidt resource_size_t r_size; 8021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (r->parent || (r->flags & mask) != type) 8041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds continue; 805022edd86d7c864bc8fadc3c8ac4e6a464472ab05Zhao, Yu r_size = resource_size(r); 8062aceefcbd5a73059e5f52831817ec277e987440dYinghai Lu#ifdef CONFIG_PCI_IOV 8072aceefcbd5a73059e5f52831817ec277e987440dYinghai Lu /* put SRIOV requested res to the optional list */ 8089e8bf93a7f416a3fa8fb6d76177d90e67bd45496Ram Pai if (realloc_head && i >= PCI_IOV_RESOURCES && 8092aceefcbd5a73059e5f52831817ec277e987440dYinghai Lu i <= PCI_IOV_RESOURCE_END) { 8102aceefcbd5a73059e5f52831817ec277e987440dYinghai Lu r->end = r->start - 1; 8119e8bf93a7f416a3fa8fb6d76177d90e67bd45496Ram Pai add_to_list(realloc_head, dev, r, r_size, 0/* dont' care */); 8122aceefcbd5a73059e5f52831817ec277e987440dYinghai Lu children_add_size += r_size; 8132aceefcbd5a73059e5f52831817ec277e987440dYinghai Lu continue; 8142aceefcbd5a73059e5f52831817ec277e987440dYinghai Lu } 8152aceefcbd5a73059e5f52831817ec277e987440dYinghai Lu#endif 8161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* For bridges size != alignment */ 8176faf17f6f1ffc586d16efc2f9fa2083a7785ee74Chris Wright align = pci_resource_alignment(dev, r); 8181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds order = __ffs(align) - 20; 8191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (order > 11) { 820865df576e8fc70daf297b53e61a4fbefc719d065Bjorn Helgaas dev_warn(&dev->dev, "disabling BAR %d: %pR " 821865df576e8fc70daf297b53e61a4fbefc719d065Bjorn Helgaas "(bad alignment %#llx)\n", i, r, 822865df576e8fc70daf297b53e61a4fbefc719d065Bjorn Helgaas (unsigned long long) align); 8231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds r->flags = 0; 8241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds continue; 8251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 8261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds size += r_size; 8271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (order < 0) 8281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds order = 0; 8291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Exclude ranges with size > align from 8301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds calculation of the alignment. */ 8311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (r_size == align) 8321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds aligns[order] += align; 8331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (order > max_order) 8341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds max_order = order; 8351f82de10d6b1d845155363c895c552e61b36b51aYinghai Lu mem64_mask &= r->flags & IORESOURCE_MEM_64; 836be768912a49b10b68e96fbd8fa3cab0adfbd3091Yinghai Lu 8379e8bf93a7f416a3fa8fb6d76177d90e67bd45496Ram Pai if (realloc_head) 8389e8bf93a7f416a3fa8fb6d76177d90e67bd45496Ram Pai children_add_size += get_res_add_size(realloc_head, r); 8391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 8401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 8411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds align = 0; 8421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds min_align = 0; 8431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (order = 0; order <= max_order; order++) { 8448308c54d7e312f7a03e2ce2057d0837e6fe3843fJeremy Fitzhardinge resource_size_t align1 = 1; 8458308c54d7e312f7a03e2ce2057d0837e6fe3843fJeremy Fitzhardinge 8468308c54d7e312f7a03e2ce2057d0837e6fe3843fJeremy Fitzhardinge align1 <<= (order + 20); 8478308c54d7e312f7a03e2ce2057d0837e6fe3843fJeremy Fitzhardinge 8481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!align) 8491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds min_align = align1; 8506f6f8c2f4b59711857d14ada8e70309d52e8fae4Milind Arun Choudhary else if (ALIGN(align + min_align, min_align) < align1) 8511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds min_align = align1 >> 1; 8521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds align += aligns[order]; 8531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 854b42282e5a05018ecdc0d63a4ad530b0999785912Linus Torvalds size0 = calculate_memsize(size, min_size, 0, resource_size(b_res), min_align); 855be768912a49b10b68e96fbd8fa3cab0adfbd3091Yinghai Lu if (children_add_size > add_size) 856be768912a49b10b68e96fbd8fa3cab0adfbd3091Yinghai Lu add_size = children_add_size; 8579e8bf93a7f416a3fa8fb6d76177d90e67bd45496Ram Pai size1 = (!realloc_head || (realloc_head && !add_size)) ? size0 : 858a4ac9fea016fc5c09227eb479bd35e34978323a4Yinghai Lu calculate_memsize(size, min_size, add_size, 859b42282e5a05018ecdc0d63a4ad530b0999785912Linus Torvalds resource_size(b_res), min_align); 860c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai if (!size0 && !size1) { 861865df576e8fc70daf297b53e61a4fbefc719d065Bjorn Helgaas if (b_res->start || b_res->end) 862865df576e8fc70daf297b53e61a4fbefc719d065Bjorn Helgaas dev_info(&bus->self->dev, "disabling bridge window " 863865df576e8fc70daf297b53e61a4fbefc719d065Bjorn Helgaas "%pR to [bus %02x-%02x] (unused)\n", b_res, 864865df576e8fc70daf297b53e61a4fbefc719d065Bjorn Helgaas bus->secondary, bus->subordinate); 8651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds b_res->flags = 0; 8661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 1; 8671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 8681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds b_res->start = min_align; 869c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai b_res->end = size0 + min_align - 1; 870c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai b_res->flags |= IORESOURCE_STARTALIGN | mem64_mask; 871b592443d9045f0880eb4d8cc9125075744db4b9eYinghai Lu if (size1 > size0 && realloc_head) { 8729e8bf93a7f416a3fa8fb6d76177d90e67bd45496Ram Pai add_to_list(realloc_head, bus->self, b_res, size1-size0, min_align); 873b592443d9045f0880eb4d8cc9125075744db4b9eYinghai Lu dev_printk(KERN_DEBUG, &bus->self->dev, "bridge window " 874b592443d9045f0880eb4d8cc9125075744db4b9eYinghai Lu "%pR to [bus %02x-%02x] add_size %llx\n", b_res, 875b592443d9045f0880eb4d8cc9125075744db4b9eYinghai Lu bus->secondary, bus->subordinate, (unsigned long long)size1-size0); 876b592443d9045f0880eb4d8cc9125075744db4b9eYinghai Lu } 8771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 1; 8781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 8791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8800a2daa1cf35004f5adbf4138555cc5669abf3a3eRam Paiunsigned long pci_cardbus_resource_alignment(struct resource *res) 8810a2daa1cf35004f5adbf4138555cc5669abf3a3eRam Pai{ 8820a2daa1cf35004f5adbf4138555cc5669abf3a3eRam Pai if (res->flags & IORESOURCE_IO) 8830a2daa1cf35004f5adbf4138555cc5669abf3a3eRam Pai return pci_cardbus_io_size; 8840a2daa1cf35004f5adbf4138555cc5669abf3a3eRam Pai if (res->flags & IORESOURCE_MEM) 8850a2daa1cf35004f5adbf4138555cc5669abf3a3eRam Pai return pci_cardbus_mem_size; 8860a2daa1cf35004f5adbf4138555cc5669abf3a3eRam Pai return 0; 8870a2daa1cf35004f5adbf4138555cc5669abf3a3eRam Pai} 8880a2daa1cf35004f5adbf4138555cc5669abf3a3eRam Pai 8890a2daa1cf35004f5adbf4138555cc5669abf3a3eRam Paistatic void pci_bus_size_cardbus(struct pci_bus *bus, 890bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu struct list_head *realloc_head) 8911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 8921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct pci_dev *bridge = bus->self; 8931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct resource *b_res = &bridge->resource[PCI_BRIDGE_RESOURCES]; 8941184893439b1a7532b579a85a354db12bbf1b277Yinghai Lu resource_size_t b_res_3_size = pci_cardbus_mem_size * 2; 8951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u16 ctrl; 8961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8973796f1e2ca38deebd30aa755ea52562b6926c73eYinghai Lu if (b_res[0].parent) 8983796f1e2ca38deebd30aa755ea52562b6926c73eYinghai Lu goto handle_b_res_1; 8991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* 9001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Reserve some resources for CardBus. We reserve 9011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * a fixed amount of bus space for CardBus bridges. 9021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 9031184893439b1a7532b579a85a354db12bbf1b277Yinghai Lu b_res[0].start = pci_cardbus_io_size; 9041184893439b1a7532b579a85a354db12bbf1b277Yinghai Lu b_res[0].end = b_res[0].start + pci_cardbus_io_size - 1; 9051184893439b1a7532b579a85a354db12bbf1b277Yinghai Lu b_res[0].flags |= IORESOURCE_IO | IORESOURCE_STARTALIGN; 9061184893439b1a7532b579a85a354db12bbf1b277Yinghai Lu if (realloc_head) { 9071184893439b1a7532b579a85a354db12bbf1b277Yinghai Lu b_res[0].end -= pci_cardbus_io_size; 9081184893439b1a7532b579a85a354db12bbf1b277Yinghai Lu add_to_list(realloc_head, bridge, b_res, pci_cardbus_io_size, 9091184893439b1a7532b579a85a354db12bbf1b277Yinghai Lu pci_cardbus_io_size); 9101184893439b1a7532b579a85a354db12bbf1b277Yinghai Lu } 9111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9123796f1e2ca38deebd30aa755ea52562b6926c73eYinghai Luhandle_b_res_1: 9133796f1e2ca38deebd30aa755ea52562b6926c73eYinghai Lu if (b_res[1].parent) 9143796f1e2ca38deebd30aa755ea52562b6926c73eYinghai Lu goto handle_b_res_2; 9151184893439b1a7532b579a85a354db12bbf1b277Yinghai Lu b_res[1].start = pci_cardbus_io_size; 9161184893439b1a7532b579a85a354db12bbf1b277Yinghai Lu b_res[1].end = b_res[1].start + pci_cardbus_io_size - 1; 9171184893439b1a7532b579a85a354db12bbf1b277Yinghai Lu b_res[1].flags |= IORESOURCE_IO | IORESOURCE_STARTALIGN; 9181184893439b1a7532b579a85a354db12bbf1b277Yinghai Lu if (realloc_head) { 9191184893439b1a7532b579a85a354db12bbf1b277Yinghai Lu b_res[1].end -= pci_cardbus_io_size; 9201184893439b1a7532b579a85a354db12bbf1b277Yinghai Lu add_to_list(realloc_head, bridge, b_res+1, pci_cardbus_io_size, 9211184893439b1a7532b579a85a354db12bbf1b277Yinghai Lu pci_cardbus_io_size); 9221184893439b1a7532b579a85a354db12bbf1b277Yinghai Lu } 9231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9243796f1e2ca38deebd30aa755ea52562b6926c73eYinghai Luhandle_b_res_2: 925dcef0d06b34a80071da4496556e85f9bf3b3c0bfYinghai Lu /* MEM1 must not be pref mmio */ 926dcef0d06b34a80071da4496556e85f9bf3b3c0bfYinghai Lu pci_read_config_word(bridge, PCI_CB_BRIDGE_CONTROL, &ctrl); 927dcef0d06b34a80071da4496556e85f9bf3b3c0bfYinghai Lu if (ctrl & PCI_CB_BRIDGE_CTL_PREFETCH_MEM1) { 928dcef0d06b34a80071da4496556e85f9bf3b3c0bfYinghai Lu ctrl &= ~PCI_CB_BRIDGE_CTL_PREFETCH_MEM1; 929dcef0d06b34a80071da4496556e85f9bf3b3c0bfYinghai Lu pci_write_config_word(bridge, PCI_CB_BRIDGE_CONTROL, ctrl); 930dcef0d06b34a80071da4496556e85f9bf3b3c0bfYinghai Lu pci_read_config_word(bridge, PCI_CB_BRIDGE_CONTROL, &ctrl); 931dcef0d06b34a80071da4496556e85f9bf3b3c0bfYinghai Lu } 932dcef0d06b34a80071da4496556e85f9bf3b3c0bfYinghai Lu 9331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* 9341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Check whether prefetchable memory is supported 9351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * by this bridge. 9361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 9371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_read_config_word(bridge, PCI_CB_BRIDGE_CONTROL, &ctrl); 9381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!(ctrl & PCI_CB_BRIDGE_CTL_PREFETCH_MEM0)) { 9391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ctrl |= PCI_CB_BRIDGE_CTL_PREFETCH_MEM0; 9401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_write_config_word(bridge, PCI_CB_BRIDGE_CONTROL, ctrl); 9411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_read_config_word(bridge, PCI_CB_BRIDGE_CONTROL, &ctrl); 9421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 9431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9443796f1e2ca38deebd30aa755ea52562b6926c73eYinghai Lu if (b_res[2].parent) 9453796f1e2ca38deebd30aa755ea52562b6926c73eYinghai Lu goto handle_b_res_3; 9461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* 9471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * If we have prefetchable memory support, allocate 9481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * two regions. Otherwise, allocate one region of 9491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * twice the size. 9501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 9511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (ctrl & PCI_CB_BRIDGE_CTL_PREFETCH_MEM0) { 9521184893439b1a7532b579a85a354db12bbf1b277Yinghai Lu b_res[2].start = pci_cardbus_mem_size; 9531184893439b1a7532b579a85a354db12bbf1b277Yinghai Lu b_res[2].end = b_res[2].start + pci_cardbus_mem_size - 1; 9541184893439b1a7532b579a85a354db12bbf1b277Yinghai Lu b_res[2].flags |= IORESOURCE_MEM | IORESOURCE_PREFETCH | 9551184893439b1a7532b579a85a354db12bbf1b277Yinghai Lu IORESOURCE_STARTALIGN; 9561184893439b1a7532b579a85a354db12bbf1b277Yinghai Lu if (realloc_head) { 9571184893439b1a7532b579a85a354db12bbf1b277Yinghai Lu b_res[2].end -= pci_cardbus_mem_size; 9581184893439b1a7532b579a85a354db12bbf1b277Yinghai Lu add_to_list(realloc_head, bridge, b_res+2, 9591184893439b1a7532b579a85a354db12bbf1b277Yinghai Lu pci_cardbus_mem_size, pci_cardbus_mem_size); 9601184893439b1a7532b579a85a354db12bbf1b277Yinghai Lu } 9611184893439b1a7532b579a85a354db12bbf1b277Yinghai Lu 9621184893439b1a7532b579a85a354db12bbf1b277Yinghai Lu /* reduce that to half */ 9631184893439b1a7532b579a85a354db12bbf1b277Yinghai Lu b_res_3_size = pci_cardbus_mem_size; 9641184893439b1a7532b579a85a354db12bbf1b277Yinghai Lu } 9651184893439b1a7532b579a85a354db12bbf1b277Yinghai Lu 9663796f1e2ca38deebd30aa755ea52562b6926c73eYinghai Luhandle_b_res_3: 9673796f1e2ca38deebd30aa755ea52562b6926c73eYinghai Lu if (b_res[3].parent) 9683796f1e2ca38deebd30aa755ea52562b6926c73eYinghai Lu goto handle_done; 9691184893439b1a7532b579a85a354db12bbf1b277Yinghai Lu b_res[3].start = pci_cardbus_mem_size; 9701184893439b1a7532b579a85a354db12bbf1b277Yinghai Lu b_res[3].end = b_res[3].start + b_res_3_size - 1; 9711184893439b1a7532b579a85a354db12bbf1b277Yinghai Lu b_res[3].flags |= IORESOURCE_MEM | IORESOURCE_STARTALIGN; 9721184893439b1a7532b579a85a354db12bbf1b277Yinghai Lu if (realloc_head) { 9731184893439b1a7532b579a85a354db12bbf1b277Yinghai Lu b_res[3].end -= b_res_3_size; 9741184893439b1a7532b579a85a354db12bbf1b277Yinghai Lu add_to_list(realloc_head, bridge, b_res+3, b_res_3_size, 9751184893439b1a7532b579a85a354db12bbf1b277Yinghai Lu pci_cardbus_mem_size); 9761184893439b1a7532b579a85a354db12bbf1b277Yinghai Lu } 9773796f1e2ca38deebd30aa755ea52562b6926c73eYinghai Lu 9783796f1e2ca38deebd30aa755ea52562b6926c73eYinghai Luhandle_done: 9793796f1e2ca38deebd30aa755ea52562b6926c73eYinghai Lu ; 9801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 9811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 982c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Paivoid __ref __pci_bus_size_bridges(struct pci_bus *bus, 983bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu struct list_head *realloc_head) 9841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 9851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct pci_dev *dev; 9861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long mask, prefmask; 987c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai resource_size_t additional_mem_size = 0, additional_io_size = 0; 9881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds list_for_each_entry(dev, &bus->devices, bus_list) { 9901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct pci_bus *b = dev->subordinate; 9911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!b) 9921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds continue; 9931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds switch (dev->class >> 8) { 9951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case PCI_CLASS_BRIDGE_CARDBUS: 9969e8bf93a7f416a3fa8fb6d76177d90e67bd45496Ram Pai pci_bus_size_cardbus(b, realloc_head); 9971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 9981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case PCI_CLASS_BRIDGE_PCI: 10001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds default: 10019e8bf93a7f416a3fa8fb6d76177d90e67bd45496Ram Pai __pci_bus_size_bridges(b, realloc_head); 10021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 10031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 10041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 10051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* The root bus? */ 10071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!bus->self) 10081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return; 10091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds switch (bus->self->class >> 8) { 10111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case PCI_CLASS_BRIDGE_CARDBUS: 10121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* don't size cardbuses yet. */ 10131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 10141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case PCI_CLASS_BRIDGE_PCI: 10161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_bridge_check_ranges(bus); 101728760489a3f1e136c5ae8581c0fa8f63511f2f4cEric W. Biederman if (bus->self->is_hotplug_bridge) { 1018c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai additional_io_size = pci_hotplug_io_size; 1019c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai additional_mem_size = pci_hotplug_mem_size; 102028760489a3f1e136c5ae8581c0fa8f63511f2f4cEric W. Biederman } 1021c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai /* 1022c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * Follow thru 1023c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai */ 10241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds default: 102519aa7ee432cec00b647443719eb5c055b69a5e8eYinghai Lu pbus_size_io(bus, realloc_head ? 0 : additional_io_size, 102619aa7ee432cec00b647443719eb5c055b69a5e8eYinghai Lu additional_io_size, realloc_head); 10271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* If the bridge supports prefetchable range, size it 10281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds separately. If it doesn't, or its prefetchable window 10291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds has already been allocated by arch code, try 10301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds non-prefetchable range for both types of PCI memory 10311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds resources. */ 10321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mask = IORESOURCE_MEM; 10331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds prefmask = IORESOURCE_MEM | IORESOURCE_PREFETCH; 103419aa7ee432cec00b647443719eb5c055b69a5e8eYinghai Lu if (pbus_size_mem(bus, prefmask, prefmask, 103519aa7ee432cec00b647443719eb5c055b69a5e8eYinghai Lu realloc_head ? 0 : additional_mem_size, 103619aa7ee432cec00b647443719eb5c055b69a5e8eYinghai Lu additional_mem_size, realloc_head)) 10371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mask = prefmask; /* Success, size non-prefetch only. */ 103828760489a3f1e136c5ae8581c0fa8f63511f2f4cEric W. Biederman else 1039c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai additional_mem_size += additional_mem_size; 104019aa7ee432cec00b647443719eb5c055b69a5e8eYinghai Lu pbus_size_mem(bus, mask, IORESOURCE_MEM, 104119aa7ee432cec00b647443719eb5c055b69a5e8eYinghai Lu realloc_head ? 0 : additional_mem_size, 104219aa7ee432cec00b647443719eb5c055b69a5e8eYinghai Lu additional_mem_size, realloc_head); 10431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 10441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 10451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 1046c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai 1047c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Paivoid __ref pci_bus_size_bridges(struct pci_bus *bus) 1048c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai{ 1049c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai __pci_bus_size_bridges(bus, NULL); 1050c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai} 10511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL(pci_bus_size_bridges); 10521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1053568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lustatic void __ref __pci_bus_assign_resources(const struct pci_bus *bus, 1054bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu struct list_head *realloc_head, 1055bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu struct list_head *fail_head) 10561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 10571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct pci_bus *b; 10581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct pci_dev *dev; 10591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10609e8bf93a7f416a3fa8fb6d76177d90e67bd45496Ram Pai pbus_assign_resources_sorted(bus, realloc_head, fail_head); 10611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds list_for_each_entry(dev, &bus->devices, bus_list) { 10631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds b = dev->subordinate; 10641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!b) 10651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds continue; 10661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10679e8bf93a7f416a3fa8fb6d76177d90e67bd45496Ram Pai __pci_bus_assign_resources(b, realloc_head, fail_head); 10681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds switch (dev->class >> 8) { 10701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case PCI_CLASS_BRIDGE_PCI: 10716841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu if (!pci_is_enabled(dev)) 10726841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu pci_setup_bridge(b); 10731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 10741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case PCI_CLASS_BRIDGE_CARDBUS: 10761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_setup_cardbus(b); 10771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 10781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds default: 108080ccba1186d48fa728dc4b1456cc07ffb07da501Bjorn Helgaas dev_info(&dev->dev, "not setting up bridge for bus " 108180ccba1186d48fa728dc4b1456cc07ffb07da501Bjorn Helgaas "%04x:%02x\n", pci_domain_nr(b), b->number); 10821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 10831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 10841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 10851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 1086568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu 1087568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Luvoid __ref pci_bus_assign_resources(const struct pci_bus *bus) 1088568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu{ 1089c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai __pci_bus_assign_resources(bus, NULL, NULL); 1090568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu} 10911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL(pci_bus_assign_resources); 10921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10936841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lustatic void __ref __pci_bridge_assign_resources(const struct pci_dev *bridge, 1094bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu struct list_head *add_head, 1095bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu struct list_head *fail_head) 10966841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu{ 10976841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu struct pci_bus *b; 10986841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu 10998424d7592eab8245b51051ee458e598213bca3b2Yinghai Lu pdev_assign_resources_sorted((struct pci_dev *)bridge, 11008424d7592eab8245b51051ee458e598213bca3b2Yinghai Lu add_head, fail_head); 11016841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu 11026841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu b = bridge->subordinate; 11036841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu if (!b) 11046841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu return; 11056841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu 11068424d7592eab8245b51051ee458e598213bca3b2Yinghai Lu __pci_bus_assign_resources(b, add_head, fail_head); 11076841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu 11086841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu switch (bridge->class >> 8) { 11096841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu case PCI_CLASS_BRIDGE_PCI: 11106841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu pci_setup_bridge(b); 11116841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu break; 11126841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu 11136841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu case PCI_CLASS_BRIDGE_CARDBUS: 11146841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu pci_setup_cardbus(b); 11156841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu break; 11166841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu 11176841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu default: 11186841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu dev_info(&bridge->dev, "not setting up bridge for bus " 11196841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu "%04x:%02x\n", pci_domain_nr(b), b->number); 11206841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu break; 11216841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu } 11226841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu} 11235009b46025acb2d3955d2c93574604fba667ef39Yinghai Lustatic void pci_bridge_release_resources(struct pci_bus *bus, 11245009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu unsigned long type) 11255009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu{ 11265009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu int idx; 11275009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu bool changed = false; 11285009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu struct pci_dev *dev; 11295009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu struct resource *r; 11305009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu unsigned long type_mask = IORESOURCE_IO | IORESOURCE_MEM | 11315009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu IORESOURCE_PREFETCH; 11325009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu 11335009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu dev = bus->self; 11345009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu for (idx = PCI_BRIDGE_RESOURCES; idx <= PCI_BRIDGE_RESOURCE_END; 11355009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu idx++) { 11365009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu r = &dev->resource[idx]; 11375009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu if ((r->flags & type_mask) != type) 11385009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu continue; 11395009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu if (!r->parent) 11405009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu continue; 11415009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu /* 11425009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu * if there are children under that, we should release them 11435009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu * all 11445009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu */ 11455009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu release_child_resources(r); 11465009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu if (!release_resource(r)) { 11475009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu dev_printk(KERN_DEBUG, &dev->dev, 11485009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu "resource %d %pR released\n", idx, r); 11495009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu /* keep the old size */ 11505009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu r->end = resource_size(r) - 1; 11515009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu r->start = 0; 11525009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu r->flags = 0; 11535009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu changed = true; 11545009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu } 11555009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu } 11565009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu 11575009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu if (changed) { 11585009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu /* avoiding touch the one without PREF */ 11595009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu if (type & IORESOURCE_PREFETCH) 11605009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu type = IORESOURCE_PREFETCH; 11615009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu __pci_setup_bridge(bus, type); 11625009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu } 11635009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu} 11645009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu 11655009b46025acb2d3955d2c93574604fba667ef39Yinghai Luenum release_type { 11665009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu leaf_only, 11675009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu whole_subtree, 11685009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu}; 11695009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu/* 11705009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu * try to release pci bridge resources that is from leaf bridge, 11715009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu * so we can allocate big new one later 11725009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu */ 11735009b46025acb2d3955d2c93574604fba667ef39Yinghai Lustatic void __ref pci_bus_release_bridge_resources(struct pci_bus *bus, 11745009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu unsigned long type, 11755009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu enum release_type rel_type) 11765009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu{ 11775009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu struct pci_dev *dev; 11785009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu bool is_leaf_bridge = true; 11795009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu 11805009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu list_for_each_entry(dev, &bus->devices, bus_list) { 11815009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu struct pci_bus *b = dev->subordinate; 11825009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu if (!b) 11835009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu continue; 11845009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu 11855009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu is_leaf_bridge = false; 11865009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu 11875009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu if ((dev->class >> 8) != PCI_CLASS_BRIDGE_PCI) 11885009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu continue; 11895009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu 11905009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu if (rel_type == whole_subtree) 11915009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu pci_bus_release_bridge_resources(b, type, 11925009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu whole_subtree); 11935009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu } 11945009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu 11955009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu if (pci_is_root_bus(bus)) 11965009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu return; 11975009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu 11985009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu if ((bus->self->class >> 8) != PCI_CLASS_BRIDGE_PCI) 11995009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu return; 12005009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu 12015009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu if ((rel_type == whole_subtree) || is_leaf_bridge) 12025009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu pci_bridge_release_resources(bus, type); 12035009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu} 12045009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu 120576fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lustatic void pci_bus_dump_res(struct pci_bus *bus) 120676fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lu{ 120789a74ecccd1f78e51faf6287e5c0e93a92ac096eBjorn Helgaas struct resource *res; 120889a74ecccd1f78e51faf6287e5c0e93a92ac096eBjorn Helgaas int i; 12097c9342b8dd1a32386fc32bffb9eedebbfe264763Yinghai Lu 121089a74ecccd1f78e51faf6287e5c0e93a92ac096eBjorn Helgaas pci_bus_for_each_resource(bus, res, i) { 12117c9342b8dd1a32386fc32bffb9eedebbfe264763Yinghai Lu if (!res || !res->end || !res->flags) 121276fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lu continue; 121376fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lu 1214c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas dev_printk(KERN_DEBUG, &bus->dev, "resource %d %pR\n", i, res); 121576fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lu } 121676fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lu} 121776fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lu 121876fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lustatic void pci_bus_dump_resources(struct pci_bus *bus) 121976fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lu{ 122076fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lu struct pci_bus *b; 122176fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lu struct pci_dev *dev; 122276fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lu 122376fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lu 122476fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lu pci_bus_dump_res(bus); 122576fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lu 122676fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lu list_for_each_entry(dev, &bus->devices, bus_list) { 122776fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lu b = dev->subordinate; 122876fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lu if (!b) 122976fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lu continue; 123076fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lu 123176fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lu pci_bus_dump_resources(b); 123276fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lu } 123376fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lu} 123476fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lu 1235da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lustatic int __init pci_bus_get_depth(struct pci_bus *bus) 1236da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu{ 1237da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu int depth = 0; 1238da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu struct pci_dev *dev; 1239da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu 1240da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu list_for_each_entry(dev, &bus->devices, bus_list) { 1241da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu int ret; 1242da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu struct pci_bus *b = dev->subordinate; 1243da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu if (!b) 1244da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu continue; 1245da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu 1246da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu ret = pci_bus_get_depth(b); 1247da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu if (ret + 1 > depth) 1248da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu depth = ret + 1; 1249da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu } 1250da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu 1251da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu return depth; 1252da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu} 1253da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lustatic int __init pci_get_max_depth(void) 1254da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu{ 1255da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu int depth = 0; 1256da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu struct pci_bus *bus; 1257da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu 1258da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu list_for_each_entry(bus, &pci_root_buses, node) { 1259da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu int ret; 1260da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu 1261da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu ret = pci_bus_get_depth(bus); 1262da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu if (ret > depth) 1263da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu depth = ret; 1264da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu } 1265da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu 1266da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu return depth; 1267da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu} 1268da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu 1269b55438fdd5173a367659a7e200acea6c9f77b8cbYinghai Lu/* 1270b55438fdd5173a367659a7e200acea6c9f77b8cbYinghai Lu * -1: undefined, will auto detect later 1271b55438fdd5173a367659a7e200acea6c9f77b8cbYinghai Lu * 0: disabled by user 1272b55438fdd5173a367659a7e200acea6c9f77b8cbYinghai Lu * 1: disabled by auto detect 1273b55438fdd5173a367659a7e200acea6c9f77b8cbYinghai Lu * 2: enabled by user 1274b55438fdd5173a367659a7e200acea6c9f77b8cbYinghai Lu * 3: enabled by auto detect 1275b55438fdd5173a367659a7e200acea6c9f77b8cbYinghai Lu */ 1276b55438fdd5173a367659a7e200acea6c9f77b8cbYinghai Luenum enable_type { 1277b55438fdd5173a367659a7e200acea6c9f77b8cbYinghai Lu undefined = -1, 1278b55438fdd5173a367659a7e200acea6c9f77b8cbYinghai Lu user_disabled, 1279b55438fdd5173a367659a7e200acea6c9f77b8cbYinghai Lu auto_disabled, 1280b55438fdd5173a367659a7e200acea6c9f77b8cbYinghai Lu user_enabled, 1281b55438fdd5173a367659a7e200acea6c9f77b8cbYinghai Lu auto_enabled, 1282b55438fdd5173a367659a7e200acea6c9f77b8cbYinghai Lu}; 1283b55438fdd5173a367659a7e200acea6c9f77b8cbYinghai Lu 1284b55438fdd5173a367659a7e200acea6c9f77b8cbYinghai Lustatic enum enable_type pci_realloc_enable __initdata = undefined; 1285b55438fdd5173a367659a7e200acea6c9f77b8cbYinghai Luvoid __init pci_realloc_get_opt(char *str) 1286b55438fdd5173a367659a7e200acea6c9f77b8cbYinghai Lu{ 1287b55438fdd5173a367659a7e200acea6c9f77b8cbYinghai Lu if (!strncmp(str, "off", 3)) 1288b55438fdd5173a367659a7e200acea6c9f77b8cbYinghai Lu pci_realloc_enable = user_disabled; 1289b55438fdd5173a367659a7e200acea6c9f77b8cbYinghai Lu else if (!strncmp(str, "on", 2)) 1290b55438fdd5173a367659a7e200acea6c9f77b8cbYinghai Lu pci_realloc_enable = user_enabled; 1291b55438fdd5173a367659a7e200acea6c9f77b8cbYinghai Lu} 1292b55438fdd5173a367659a7e200acea6c9f77b8cbYinghai Lustatic bool __init pci_realloc_enabled(void) 1293b55438fdd5173a367659a7e200acea6c9f77b8cbYinghai Lu{ 1294b55438fdd5173a367659a7e200acea6c9f77b8cbYinghai Lu return pci_realloc_enable >= user_enabled; 1295b55438fdd5173a367659a7e200acea6c9f77b8cbYinghai Lu} 1296f483d3923dc3a6394c483e28ccb3fe700bdf399eRam Pai 1297b07f2ebc109b607789f648dedcff4b125f9afec6Yinghai Lustatic void __init pci_realloc_detect(void) 1298b07f2ebc109b607789f648dedcff4b125f9afec6Yinghai Lu{ 1299b07f2ebc109b607789f648dedcff4b125f9afec6Yinghai Lu#if defined(CONFIG_PCI_IOV) && defined(CONFIG_PCI_REALLOC_ENABLE_AUTO) 1300b07f2ebc109b607789f648dedcff4b125f9afec6Yinghai Lu struct pci_dev *dev = NULL; 1301b07f2ebc109b607789f648dedcff4b125f9afec6Yinghai Lu 1302b07f2ebc109b607789f648dedcff4b125f9afec6Yinghai Lu if (pci_realloc_enable != undefined) 1303b07f2ebc109b607789f648dedcff4b125f9afec6Yinghai Lu return; 1304b07f2ebc109b607789f648dedcff4b125f9afec6Yinghai Lu 1305b07f2ebc109b607789f648dedcff4b125f9afec6Yinghai Lu for_each_pci_dev(dev) { 1306b07f2ebc109b607789f648dedcff4b125f9afec6Yinghai Lu int i; 1307b07f2ebc109b607789f648dedcff4b125f9afec6Yinghai Lu 1308b07f2ebc109b607789f648dedcff4b125f9afec6Yinghai Lu for (i = PCI_IOV_RESOURCES; i <= PCI_IOV_RESOURCE_END; i++) { 1309b07f2ebc109b607789f648dedcff4b125f9afec6Yinghai Lu struct resource *r = &dev->resource[i]; 1310b07f2ebc109b607789f648dedcff4b125f9afec6Yinghai Lu 1311b07f2ebc109b607789f648dedcff4b125f9afec6Yinghai Lu /* Not assigned, or rejected by kernel ? */ 1312b07f2ebc109b607789f648dedcff4b125f9afec6Yinghai Lu if (r->flags && !r->start) { 1313b07f2ebc109b607789f648dedcff4b125f9afec6Yinghai Lu pci_realloc_enable = auto_enabled; 1314b07f2ebc109b607789f648dedcff4b125f9afec6Yinghai Lu 1315b07f2ebc109b607789f648dedcff4b125f9afec6Yinghai Lu return; 1316b07f2ebc109b607789f648dedcff4b125f9afec6Yinghai Lu } 1317b07f2ebc109b607789f648dedcff4b125f9afec6Yinghai Lu } 1318b07f2ebc109b607789f648dedcff4b125f9afec6Yinghai Lu } 1319b07f2ebc109b607789f648dedcff4b125f9afec6Yinghai Lu#endif 1320b07f2ebc109b607789f648dedcff4b125f9afec6Yinghai Lu} 1321b07f2ebc109b607789f648dedcff4b125f9afec6Yinghai Lu 1322da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu/* 1323da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu * first try will not touch pci bridge res 1324da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu * second and later try will clear small leaf bridge res 1325da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu * will stop till to the max deepth if can not find good one 1326da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu */ 13271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid __init 13281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldspci_assign_unassigned_resources(void) 13291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 13301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct pci_bus *bus; 1331bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu LIST_HEAD(realloc_head); /* list of resources that 1332c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai want additional resources */ 1333bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu struct list_head *add_list = NULL; 1334da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu int tried_times = 0; 1335da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu enum release_type rel_type = leaf_only; 1336bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu LIST_HEAD(fail_head); 1337b9b0bba96cf5acbf025f7829fbf6c09e74323b41Yinghai Lu struct pci_dev_resource *fail_res; 1338da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu unsigned long type_mask = IORESOURCE_IO | IORESOURCE_MEM | 1339da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu IORESOURCE_PREFETCH; 134019aa7ee432cec00b647443719eb5c055b69a5e8eYinghai Lu int pci_try_num = 1; 1341da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu 134219aa7ee432cec00b647443719eb5c055b69a5e8eYinghai Lu /* don't realloc if asked to do so */ 1343b07f2ebc109b607789f648dedcff4b125f9afec6Yinghai Lu pci_realloc_detect(); 134419aa7ee432cec00b647443719eb5c055b69a5e8eYinghai Lu if (pci_realloc_enabled()) { 134519aa7ee432cec00b647443719eb5c055b69a5e8eYinghai Lu int max_depth = pci_get_max_depth(); 134619aa7ee432cec00b647443719eb5c055b69a5e8eYinghai Lu 134719aa7ee432cec00b647443719eb5c055b69a5e8eYinghai Lu pci_try_num = max_depth + 1; 134819aa7ee432cec00b647443719eb5c055b69a5e8eYinghai Lu printk(KERN_DEBUG "PCI: max bus depth: %d pci_try_num: %d\n", 134919aa7ee432cec00b647443719eb5c055b69a5e8eYinghai Lu max_depth, pci_try_num); 135019aa7ee432cec00b647443719eb5c055b69a5e8eYinghai Lu } 1351da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu 1352da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Luagain: 135319aa7ee432cec00b647443719eb5c055b69a5e8eYinghai Lu /* 135419aa7ee432cec00b647443719eb5c055b69a5e8eYinghai Lu * last try will use add_list, otherwise will try good to have as 135519aa7ee432cec00b647443719eb5c055b69a5e8eYinghai Lu * must have, so can realloc parent bridge resource 135619aa7ee432cec00b647443719eb5c055b69a5e8eYinghai Lu */ 135719aa7ee432cec00b647443719eb5c055b69a5e8eYinghai Lu if (tried_times + 1 == pci_try_num) 1358bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu add_list = &realloc_head; 13591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Depth first, calculate sizes and alignments of all 13601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds subordinate buses. */ 1361da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu list_for_each_entry(bus, &pci_root_buses, node) 136219aa7ee432cec00b647443719eb5c055b69a5e8eYinghai Lu __pci_bus_size_bridges(bus, add_list); 1363c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai 13641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Depth last, allocate resources and update the hardware. */ 1365da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu list_for_each_entry(bus, &pci_root_buses, node) 1366bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu __pci_bus_assign_resources(bus, add_list, &fail_head); 136719aa7ee432cec00b647443719eb5c055b69a5e8eYinghai Lu if (add_list) 1368bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu BUG_ON(!list_empty(add_list)); 1369da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu tried_times++; 1370da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu 1371da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu /* any device complain? */ 1372bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu if (list_empty(&fail_head)) 1373da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu goto enable_and_dump; 1374f483d3923dc3a6394c483e28ccb3fe700bdf399eRam Pai 13750c5be0cb0edfe3b5c4b62eac68aa2aa15ec681afYinghai Lu if (tried_times >= pci_try_num) { 1376eb572e7c76f154d75f90a783924f88afc34d5fecYinghai Lu if (pci_realloc_enable == undefined) 1377eb572e7c76f154d75f90a783924f88afc34d5fecYinghai Lu printk(KERN_INFO "Some PCI device resources are unassigned, try booting with pci=realloc\n"); 1378b07f2ebc109b607789f648dedcff4b125f9afec6Yinghai Lu else if (pci_realloc_enable == auto_enabled) 1379b07f2ebc109b607789f648dedcff4b125f9afec6Yinghai Lu printk(KERN_INFO "Automatically enabled pci realloc, if you have problem, try booting with pci=realloc=off\n"); 1380eb572e7c76f154d75f90a783924f88afc34d5fecYinghai Lu 1381bffc56d41102705d809f88c29918a9c33d2900f7Yinghai Lu free_list(&fail_head); 1382da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu goto enable_and_dump; 1383da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu } 1384da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu 1385da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu printk(KERN_DEBUG "PCI: No. %d try to assign unassigned res\n", 1386da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu tried_times + 1); 1387da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu 1388da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu /* third times and later will not check if it is leaf */ 1389da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu if ((tried_times + 1) > 2) 1390da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu rel_type = whole_subtree; 1391da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu 1392da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu /* 1393da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu * Try to release leaf bridge's resources that doesn't fit resource of 1394da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu * child device under that bridge 1395da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu */ 1396b9b0bba96cf5acbf025f7829fbf6c09e74323b41Yinghai Lu list_for_each_entry(fail_res, &fail_head, list) { 1397b9b0bba96cf5acbf025f7829fbf6c09e74323b41Yinghai Lu bus = fail_res->dev->bus; 1398bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu pci_bus_release_bridge_resources(bus, 1399b9b0bba96cf5acbf025f7829fbf6c09e74323b41Yinghai Lu fail_res->flags & type_mask, 1400bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu rel_type); 1401da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu } 1402da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu /* restore size and flags */ 1403b9b0bba96cf5acbf025f7829fbf6c09e74323b41Yinghai Lu list_for_each_entry(fail_res, &fail_head, list) { 1404b9b0bba96cf5acbf025f7829fbf6c09e74323b41Yinghai Lu struct resource *res = fail_res->res; 1405da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu 1406b9b0bba96cf5acbf025f7829fbf6c09e74323b41Yinghai Lu res->start = fail_res->start; 1407b9b0bba96cf5acbf025f7829fbf6c09e74323b41Yinghai Lu res->end = fail_res->end; 1408b9b0bba96cf5acbf025f7829fbf6c09e74323b41Yinghai Lu res->flags = fail_res->flags; 1409b9b0bba96cf5acbf025f7829fbf6c09e74323b41Yinghai Lu if (fail_res->dev->subordinate) 1410da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu res->flags = 0; 1411da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu } 1412bffc56d41102705d809f88c29918a9c33d2900f7Yinghai Lu free_list(&fail_head); 1413da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu 1414da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu goto again; 1415da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu 1416da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Luenable_and_dump: 1417da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu /* Depth last, update the hardware. */ 1418da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu list_for_each_entry(bus, &pci_root_buses, node) 1419da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu pci_enable_bridges(bus); 142076fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lu 142176fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lu /* dump the resource on buses */ 1422da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu list_for_each_entry(bus, &pci_root_buses, node) 142376fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lu pci_bus_dump_resources(bus); 14241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 14256841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu 14266841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Luvoid pci_assign_unassigned_bridge_resources(struct pci_dev *bridge) 14276841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu{ 14286841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu struct pci_bus *parent = bridge->subordinate; 1429bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu LIST_HEAD(add_list); /* list of resources that 14308424d7592eab8245b51051ee458e598213bca3b2Yinghai Lu want additional resources */ 143132180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu int tried_times = 0; 1432bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu LIST_HEAD(fail_head); 1433b9b0bba96cf5acbf025f7829fbf6c09e74323b41Yinghai Lu struct pci_dev_resource *fail_res; 14346841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu int retval; 143532180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu unsigned long type_mask = IORESOURCE_IO | IORESOURCE_MEM | 143632180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu IORESOURCE_PREFETCH; 143732180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu 143832180e402f9ff1f3389c99edf3f393425e706080Yinghai Luagain: 14398424d7592eab8245b51051ee458e598213bca3b2Yinghai Lu __pci_bus_size_bridges(parent, &add_list); 1440bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu __pci_bridge_assign_resources(bridge, &add_list, &fail_head); 1441bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu BUG_ON(!list_empty(&add_list)); 144232180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu tried_times++; 144332180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu 1444bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu if (list_empty(&fail_head)) 14453f579c340fe6d6bdd8c6f9f144e7c3b85d4174ecYinghai Lu goto enable_all; 144632180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu 144732180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu if (tried_times >= 2) { 144832180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu /* still fail, don't need to try more */ 1449bffc56d41102705d809f88c29918a9c33d2900f7Yinghai Lu free_list(&fail_head); 14503f579c340fe6d6bdd8c6f9f144e7c3b85d4174ecYinghai Lu goto enable_all; 145132180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu } 145232180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu 145332180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu printk(KERN_DEBUG "PCI: No. %d try to assign unassigned res\n", 145432180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu tried_times + 1); 145532180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu 145632180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu /* 145732180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu * Try to release leaf bridge's resources that doesn't fit resource of 145832180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu * child device under that bridge 145932180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu */ 1460b9b0bba96cf5acbf025f7829fbf6c09e74323b41Yinghai Lu list_for_each_entry(fail_res, &fail_head, list) { 1461b9b0bba96cf5acbf025f7829fbf6c09e74323b41Yinghai Lu struct pci_bus *bus = fail_res->dev->bus; 1462b9b0bba96cf5acbf025f7829fbf6c09e74323b41Yinghai Lu unsigned long flags = fail_res->flags; 146332180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu 146432180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu pci_bus_release_bridge_resources(bus, flags & type_mask, 146532180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu whole_subtree); 146632180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu } 146732180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu /* restore size and flags */ 1468b9b0bba96cf5acbf025f7829fbf6c09e74323b41Yinghai Lu list_for_each_entry(fail_res, &fail_head, list) { 1469b9b0bba96cf5acbf025f7829fbf6c09e74323b41Yinghai Lu struct resource *res = fail_res->res; 147032180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu 1471b9b0bba96cf5acbf025f7829fbf6c09e74323b41Yinghai Lu res->start = fail_res->start; 1472b9b0bba96cf5acbf025f7829fbf6c09e74323b41Yinghai Lu res->end = fail_res->end; 1473b9b0bba96cf5acbf025f7829fbf6c09e74323b41Yinghai Lu res->flags = fail_res->flags; 1474b9b0bba96cf5acbf025f7829fbf6c09e74323b41Yinghai Lu if (fail_res->dev->subordinate) 147532180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu res->flags = 0; 147632180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu } 1477bffc56d41102705d809f88c29918a9c33d2900f7Yinghai Lu free_list(&fail_head); 147832180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu 147932180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu goto again; 14803f579c340fe6d6bdd8c6f9f144e7c3b85d4174ecYinghai Lu 14813f579c340fe6d6bdd8c6f9f144e7c3b85d4174ecYinghai Luenable_all: 14823f579c340fe6d6bdd8c6f9f144e7c3b85d4174ecYinghai Lu retval = pci_reenable_device(bridge); 14833f579c340fe6d6bdd8c6f9f144e7c3b85d4174ecYinghai Lu pci_set_master(bridge); 14843f579c340fe6d6bdd8c6f9f144e7c3b85d4174ecYinghai Lu pci_enable_bridges(parent); 14856841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu} 14866841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai LuEXPORT_SYMBOL_GPL(pci_assign_unassigned_bridge_resources); 14879b03088f955552299f50a1f660372698b07ab339Yinghai Lu 14889b03088f955552299f50a1f660372698b07ab339Yinghai Lu#ifdef CONFIG_HOTPLUG 14899b03088f955552299f50a1f660372698b07ab339Yinghai Lu/** 14909b03088f955552299f50a1f660372698b07ab339Yinghai Lu * pci_rescan_bus - scan a PCI bus for devices. 14919b03088f955552299f50a1f660372698b07ab339Yinghai Lu * @bus: PCI bus to scan 14929b03088f955552299f50a1f660372698b07ab339Yinghai Lu * 14939b03088f955552299f50a1f660372698b07ab339Yinghai Lu * Scan a PCI bus and child buses for new devices, adds them, 14949b03088f955552299f50a1f660372698b07ab339Yinghai Lu * and enables them. 14959b03088f955552299f50a1f660372698b07ab339Yinghai Lu * 14969b03088f955552299f50a1f660372698b07ab339Yinghai Lu * Returns the max number of subordinate bus discovered. 14979b03088f955552299f50a1f660372698b07ab339Yinghai Lu */ 14989b03088f955552299f50a1f660372698b07ab339Yinghai Luunsigned int __ref pci_rescan_bus(struct pci_bus *bus) 14999b03088f955552299f50a1f660372698b07ab339Yinghai Lu{ 15009b03088f955552299f50a1f660372698b07ab339Yinghai Lu unsigned int max; 15019b03088f955552299f50a1f660372698b07ab339Yinghai Lu struct pci_dev *dev; 1502bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu LIST_HEAD(add_list); /* list of resources that 15039b03088f955552299f50a1f660372698b07ab339Yinghai Lu want additional resources */ 15049b03088f955552299f50a1f660372698b07ab339Yinghai Lu 15059b03088f955552299f50a1f660372698b07ab339Yinghai Lu max = pci_scan_child_bus(bus); 15069b03088f955552299f50a1f660372698b07ab339Yinghai Lu 15079b03088f955552299f50a1f660372698b07ab339Yinghai Lu down_read(&pci_bus_sem); 15089b03088f955552299f50a1f660372698b07ab339Yinghai Lu list_for_each_entry(dev, &bus->devices, bus_list) 15099b03088f955552299f50a1f660372698b07ab339Yinghai Lu if (dev->hdr_type == PCI_HEADER_TYPE_BRIDGE || 15109b03088f955552299f50a1f660372698b07ab339Yinghai Lu dev->hdr_type == PCI_HEADER_TYPE_CARDBUS) 15119b03088f955552299f50a1f660372698b07ab339Yinghai Lu if (dev->subordinate) 15129b03088f955552299f50a1f660372698b07ab339Yinghai Lu __pci_bus_size_bridges(dev->subordinate, 15139b03088f955552299f50a1f660372698b07ab339Yinghai Lu &add_list); 15149b03088f955552299f50a1f660372698b07ab339Yinghai Lu up_read(&pci_bus_sem); 15159b03088f955552299f50a1f660372698b07ab339Yinghai Lu __pci_bus_assign_resources(bus, &add_list, NULL); 1516bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu BUG_ON(!list_empty(&add_list)); 15179b03088f955552299f50a1f660372698b07ab339Yinghai Lu 15189b03088f955552299f50a1f660372698b07ab339Yinghai Lu pci_enable_bridges(bus); 15199b03088f955552299f50a1f660372698b07ab339Yinghai Lu pci_bus_add_devices(bus); 15209b03088f955552299f50a1f660372698b07ab339Yinghai Lu 15219b03088f955552299f50a1f660372698b07ab339Yinghai Lu return max; 15229b03088f955552299f50a1f660372698b07ab339Yinghai Lu} 15239b03088f955552299f50a1f660372698b07ab339Yinghai LuEXPORT_SYMBOL_GPL(pci_rescan_bus); 15249b03088f955552299f50a1f660372698b07ab339Yinghai Lu#endif 1525