setup-bus.c revision 0c5be0cb0edfe3b5c4b62eac68aa2aa15ec681af
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 51f483d3923dc3a6394c483e28ccb3fe700bdf399eRam Paiint pci_realloc_enable = 0; 52f483d3923dc3a6394c483e28ccb3fe700bdf399eRam Pai#define pci_realloc_enabled() pci_realloc_enable 53f483d3923dc3a6394c483e28ccb3fe700bdf399eRam Paivoid pci_realloc(void) 54f483d3923dc3a6394c483e28ccb3fe700bdf399eRam Pai{ 55f483d3923dc3a6394c483e28ccb3fe700bdf399eRam Pai pci_realloc_enable = 1; 56f483d3923dc3a6394c483e28ccb3fe700bdf399eRam Pai} 57f483d3923dc3a6394c483e28ccb3fe700bdf399eRam Pai 58c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai/** 59c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * add_to_list() - add a new resource tracker to the list 60c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * @head: Head of the list 61c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * @dev: device corresponding to which the resource 62c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * belongs 63c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * @res: The resource to be tracked 64c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * @add_size: additional size to be optionally added 65c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * to the resource 66c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai */ 67bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lustatic int add_to_list(struct list_head *head, 68c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai struct pci_dev *dev, struct resource *res, 692bbc6942273b5b3097bd265d82227bdd84b351b2Ram Pai resource_size_t add_size, resource_size_t min_align) 70568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu{ 71764242a0aec69e10b8dc0f4f0303a6800b09cf45Yinghai Lu struct pci_dev_resource *tmp; 72568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu 73bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu tmp = kzalloc(sizeof(*tmp), GFP_KERNEL); 74568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu if (!tmp) { 75c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai pr_warning("add_to_list: kmalloc() failed!\n"); 76ef62dfefa93bc90f1cb0f4a55c2d86b3269b3f92Yinghai Lu return -ENOMEM; 77568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu } 78568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu 79568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu tmp->res = res; 80568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu tmp->dev = dev; 81568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu tmp->start = res->start; 82568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu tmp->end = res->end; 83568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu tmp->flags = res->flags; 84c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai tmp->add_size = add_size; 852bbc6942273b5b3097bd265d82227bdd84b351b2Ram Pai tmp->min_align = min_align; 86bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu 87bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu list_add(&tmp->list, head); 88ef62dfefa93bc90f1cb0f4a55c2d86b3269b3f92Yinghai Lu 89ef62dfefa93bc90f1cb0f4a55c2d86b3269b3f92Yinghai Lu return 0; 90568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu} 91568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu 92b9b0bba96cf5acbf025f7829fbf6c09e74323b41Yinghai Lustatic void remove_from_list(struct list_head *head, 933e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu struct resource *res) 943e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu{ 95b9b0bba96cf5acbf025f7829fbf6c09e74323b41Yinghai Lu struct pci_dev_resource *dev_res, *tmp; 963e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu 97b9b0bba96cf5acbf025f7829fbf6c09e74323b41Yinghai Lu list_for_each_entry_safe(dev_res, tmp, head, list) { 98b9b0bba96cf5acbf025f7829fbf6c09e74323b41Yinghai Lu if (dev_res->res == res) { 99b9b0bba96cf5acbf025f7829fbf6c09e74323b41Yinghai Lu list_del(&dev_res->list); 100b9b0bba96cf5acbf025f7829fbf6c09e74323b41Yinghai Lu kfree(dev_res); 101bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu break; 1023e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu } 1033e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu } 1043e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu} 1053e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu 106b9b0bba96cf5acbf025f7829fbf6c09e74323b41Yinghai Lustatic resource_size_t get_res_add_size(struct list_head *head, 1071c372353e9c681b127f21030f8a0f0c2afd82429Yinghai Lu struct resource *res) 1081c372353e9c681b127f21030f8a0f0c2afd82429Yinghai Lu{ 109b9b0bba96cf5acbf025f7829fbf6c09e74323b41Yinghai Lu struct pci_dev_resource *dev_res; 110bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu 111b9b0bba96cf5acbf025f7829fbf6c09e74323b41Yinghai Lu list_for_each_entry(dev_res, head, list) { 112b9b0bba96cf5acbf025f7829fbf6c09e74323b41Yinghai Lu if (dev_res->res == res) { 113b592443d9045f0880eb4d8cc9125075744db4b9eYinghai Lu int idx = res - &dev_res->dev->resource[0]; 114b592443d9045f0880eb4d8cc9125075744db4b9eYinghai Lu 115b9b0bba96cf5acbf025f7829fbf6c09e74323b41Yinghai Lu dev_printk(KERN_DEBUG, &dev_res->dev->dev, 116b592443d9045f0880eb4d8cc9125075744db4b9eYinghai Lu "res[%d]=%pR get_res_add_size add_size %llx\n", 117b592443d9045f0880eb4d8cc9125075744db4b9eYinghai Lu idx, dev_res->res, 118b9b0bba96cf5acbf025f7829fbf6c09e74323b41Yinghai Lu (unsigned long long)dev_res->add_size); 119b592443d9045f0880eb4d8cc9125075744db4b9eYinghai Lu 120b9b0bba96cf5acbf025f7829fbf6c09e74323b41Yinghai Lu return dev_res->add_size; 121bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu } 1223e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu } 1231c372353e9c681b127f21030f8a0f0c2afd82429Yinghai Lu 1241c372353e9c681b127f21030f8a0f0c2afd82429Yinghai Lu return 0; 1251c372353e9c681b127f21030f8a0f0c2afd82429Yinghai Lu} 1261c372353e9c681b127f21030f8a0f0c2afd82429Yinghai Lu 12778c3b329b9dd7097781cb900146e503e499cccfeYinghai Lu/* Sort resources by alignment */ 128bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lustatic void pdev_sort_resources(struct pci_dev *dev, struct list_head *head) 12978c3b329b9dd7097781cb900146e503e499cccfeYinghai Lu{ 13078c3b329b9dd7097781cb900146e503e499cccfeYinghai Lu int i; 13178c3b329b9dd7097781cb900146e503e499cccfeYinghai Lu 13278c3b329b9dd7097781cb900146e503e499cccfeYinghai Lu for (i = 0; i < PCI_NUM_RESOURCES; i++) { 13378c3b329b9dd7097781cb900146e503e499cccfeYinghai Lu struct resource *r; 134bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu struct pci_dev_resource *dev_res, *tmp; 13578c3b329b9dd7097781cb900146e503e499cccfeYinghai Lu resource_size_t r_align; 136bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu struct list_head *n; 13778c3b329b9dd7097781cb900146e503e499cccfeYinghai Lu 13878c3b329b9dd7097781cb900146e503e499cccfeYinghai Lu r = &dev->resource[i]; 13978c3b329b9dd7097781cb900146e503e499cccfeYinghai Lu 14078c3b329b9dd7097781cb900146e503e499cccfeYinghai Lu if (r->flags & IORESOURCE_PCI_FIXED) 14178c3b329b9dd7097781cb900146e503e499cccfeYinghai Lu continue; 14278c3b329b9dd7097781cb900146e503e499cccfeYinghai Lu 14378c3b329b9dd7097781cb900146e503e499cccfeYinghai Lu if (!(r->flags) || r->parent) 14478c3b329b9dd7097781cb900146e503e499cccfeYinghai Lu continue; 14578c3b329b9dd7097781cb900146e503e499cccfeYinghai Lu 14678c3b329b9dd7097781cb900146e503e499cccfeYinghai Lu r_align = pci_resource_alignment(dev, r); 14778c3b329b9dd7097781cb900146e503e499cccfeYinghai Lu if (!r_align) { 14878c3b329b9dd7097781cb900146e503e499cccfeYinghai Lu dev_warn(&dev->dev, "BAR %d: %pR has bogus alignment\n", 14978c3b329b9dd7097781cb900146e503e499cccfeYinghai Lu i, r); 15078c3b329b9dd7097781cb900146e503e499cccfeYinghai Lu continue; 15178c3b329b9dd7097781cb900146e503e499cccfeYinghai Lu } 15278c3b329b9dd7097781cb900146e503e499cccfeYinghai Lu 153bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu tmp = kzalloc(sizeof(*tmp), GFP_KERNEL); 154bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu if (!tmp) 155bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu panic("pdev_sort_resources(): " 156bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu "kmalloc() failed!\n"); 157bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu tmp->res = r; 158bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu tmp->dev = dev; 159bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu 160bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu /* fallback is smallest one or list is empty*/ 161bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu n = head; 162bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu list_for_each_entry(dev_res, head, list) { 163bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu resource_size_t align; 164bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu 165bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu align = pci_resource_alignment(dev_res->dev, 166bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu dev_res->res); 16778c3b329b9dd7097781cb900146e503e499cccfeYinghai Lu 16878c3b329b9dd7097781cb900146e503e499cccfeYinghai Lu if (r_align > align) { 169bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu n = &dev_res->list; 17078c3b329b9dd7097781cb900146e503e499cccfeYinghai Lu break; 17178c3b329b9dd7097781cb900146e503e499cccfeYinghai Lu } 17278c3b329b9dd7097781cb900146e503e499cccfeYinghai Lu } 173bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu /* Insert it just before n*/ 174bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu list_add_tail(&tmp->list, n); 17578c3b329b9dd7097781cb900146e503e499cccfeYinghai Lu } 17678c3b329b9dd7097781cb900146e503e499cccfeYinghai Lu} 17778c3b329b9dd7097781cb900146e503e499cccfeYinghai Lu 1786841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lustatic void __dev_sort_resources(struct pci_dev *dev, 179bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu struct list_head *head) 1801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1816841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu u16 class = dev->class >> 8; 1821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1836841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu /* Don't touch classless devices or host bridges or ioapics. */ 1846841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu if (class == PCI_CLASS_NOT_DEFINED || class == PCI_CLASS_BRIDGE_HOST) 1856841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu return; 1861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1876841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu /* Don't touch ioapic devices already enabled by firmware */ 1886841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu if (class == PCI_CLASS_SYSTEM_PIC) { 1896841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu u16 command; 1906841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu pci_read_config_word(dev, PCI_COMMAND, &command); 1916841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu if (command & (PCI_COMMAND_IO | PCI_COMMAND_MEMORY)) 1926841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu return; 1936841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu } 1941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1956841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu pdev_sort_resources(dev, head); 1966841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu} 19723186279658cea6d42a050400d3e79c56cb459b4Satoru Takeuchi 198fc075e1da1b96ef65c32e83648055606b8204b58Ram Paistatic inline void reset_resource(struct resource *res) 199fc075e1da1b96ef65c32e83648055606b8204b58Ram Pai{ 200fc075e1da1b96ef65c32e83648055606b8204b58Ram Pai res->start = 0; 201fc075e1da1b96ef65c32e83648055606b8204b58Ram Pai res->end = 0; 202fc075e1da1b96ef65c32e83648055606b8204b58Ram Pai res->flags = 0; 203fc075e1da1b96ef65c32e83648055606b8204b58Ram Pai} 204fc075e1da1b96ef65c32e83648055606b8204b58Ram Pai 205c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai/** 2069e8bf93a7f416a3fa8fb6d76177d90e67bd45496Ram Pai * reassign_resources_sorted() - satisfy any additional resource requests 207c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * 2089e8bf93a7f416a3fa8fb6d76177d90e67bd45496Ram Pai * @realloc_head : head of the list tracking requests requiring additional 209c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * resources 210c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * @head : head of the list tracking requests with allocated 211c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * resources 212c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * 2139e8bf93a7f416a3fa8fb6d76177d90e67bd45496Ram Pai * Walk through each element of the realloc_head and try to procure 214c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * additional resources for the element, provided the element 215c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * is in the head list. 216c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai */ 217bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lustatic void reassign_resources_sorted(struct list_head *realloc_head, 218bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu struct list_head *head) 2196841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu{ 2206841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu struct resource *res; 221b9b0bba96cf5acbf025f7829fbf6c09e74323b41Yinghai Lu struct pci_dev_resource *add_res, *tmp; 222bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu struct pci_dev_resource *dev_res; 223c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai resource_size_t add_size; 2246841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu int idx; 2251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 226b9b0bba96cf5acbf025f7829fbf6c09e74323b41Yinghai Lu list_for_each_entry_safe(add_res, tmp, realloc_head, list) { 227bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu bool found_match = false; 228bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu 229b9b0bba96cf5acbf025f7829fbf6c09e74323b41Yinghai Lu res = add_res->res; 230c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai /* skip resource that has been reset */ 231c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai if (!res->flags) 232c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai goto out; 233c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai 234c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai /* skip this resource if not found in head list */ 235bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu list_for_each_entry(dev_res, head, list) { 236bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu if (dev_res->res == res) { 237bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu found_match = true; 238bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu break; 239bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu } 240c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai } 241bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu if (!found_match)/* just skip */ 242bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu continue; 243c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai 244b9b0bba96cf5acbf025f7829fbf6c09e74323b41Yinghai Lu idx = res - &add_res->dev->resource[0]; 245b9b0bba96cf5acbf025f7829fbf6c09e74323b41Yinghai Lu add_size = add_res->add_size; 2462bbc6942273b5b3097bd265d82227bdd84b351b2Ram Pai if (!resource_size(res)) { 247b9b0bba96cf5acbf025f7829fbf6c09e74323b41Yinghai Lu res->start = add_res->start; 2482bbc6942273b5b3097bd265d82227bdd84b351b2Ram Pai res->end = res->start + add_size - 1; 249b9b0bba96cf5acbf025f7829fbf6c09e74323b41Yinghai Lu if (pci_assign_resource(add_res->dev, idx)) 250c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai reset_resource(res); 2512bbc6942273b5b3097bd265d82227bdd84b351b2Ram Pai } else { 252b9b0bba96cf5acbf025f7829fbf6c09e74323b41Yinghai Lu resource_size_t align = add_res->min_align; 253b9b0bba96cf5acbf025f7829fbf6c09e74323b41Yinghai Lu res->flags |= add_res->flags & 254bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu (IORESOURCE_STARTALIGN|IORESOURCE_SIZEALIGN); 255b9b0bba96cf5acbf025f7829fbf6c09e74323b41Yinghai Lu if (pci_reassign_resource(add_res->dev, idx, 256bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu add_size, align)) 257b9b0bba96cf5acbf025f7829fbf6c09e74323b41Yinghai Lu dev_printk(KERN_DEBUG, &add_res->dev->dev, 258b592443d9045f0880eb4d8cc9125075744db4b9eYinghai Lu "failed to add %llx res[%d]=%pR\n", 259b592443d9045f0880eb4d8cc9125075744db4b9eYinghai Lu (unsigned long long)add_size, 260b592443d9045f0880eb4d8cc9125075744db4b9eYinghai Lu idx, res); 261c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai } 262c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Paiout: 263b9b0bba96cf5acbf025f7829fbf6c09e74323b41Yinghai Lu list_del(&add_res->list); 264b9b0bba96cf5acbf025f7829fbf6c09e74323b41Yinghai Lu kfree(add_res); 265c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai } 266c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai} 267c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai 268c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai/** 269c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * assign_requested_resources_sorted() - satisfy resource requests 270c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * 271c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * @head : head of the list tracking requests for resources 272c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * @failed_list : head of the list tracking requests that could 273c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * not be allocated 274c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * 275c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * Satisfy resource requests of each element in the list. Add 276c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * requests that could not satisfied to the failed_list. 277c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai */ 278bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lustatic void assign_requested_resources_sorted(struct list_head *head, 279bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu struct list_head *fail_head) 280c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai{ 281c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai struct resource *res; 282bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu struct pci_dev_resource *dev_res; 283c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai int idx; 2849a928660c9dcaff568c9d379655c5aa16fb981f8Yinghai Lu 285bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu list_for_each_entry(dev_res, head, list) { 286bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu res = dev_res->res; 287bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu idx = res - &dev_res->dev->resource[0]; 288bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu if (resource_size(res) && 289bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu pci_assign_resource(dev_res->dev, idx)) { 290bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu if (fail_head && !pci_is_root_bus(dev_res->dev->bus)) { 2919a928660c9dcaff568c9d379655c5aa16fb981f8Yinghai Lu /* 2929a928660c9dcaff568c9d379655c5aa16fb981f8Yinghai Lu * if the failed res is for ROM BAR, and it will 2939a928660c9dcaff568c9d379655c5aa16fb981f8Yinghai Lu * be enabled later, don't add it to the list 2949a928660c9dcaff568c9d379655c5aa16fb981f8Yinghai Lu */ 2959a928660c9dcaff568c9d379655c5aa16fb981f8Yinghai Lu if (!((idx == PCI_ROM_RESOURCE) && 2969a928660c9dcaff568c9d379655c5aa16fb981f8Yinghai Lu (!(res->flags & IORESOURCE_ROM_ENABLE)))) 29767cc7e26a5c46508ee00b9fe169aad833b798025Yinghai Lu add_to_list(fail_head, 29867cc7e26a5c46508ee00b9fe169aad833b798025Yinghai Lu dev_res->dev, res, 29967cc7e26a5c46508ee00b9fe169aad833b798025Yinghai Lu 0 /* dont care */, 30067cc7e26a5c46508ee00b9fe169aad833b798025Yinghai Lu 0 /* dont care */); 3019a928660c9dcaff568c9d379655c5aa16fb981f8Yinghai Lu } 302fc075e1da1b96ef65c32e83648055606b8204b58Ram Pai reset_resource(res); 303542df5de56a23bf2d94b75e2b304ab0e5a5508a8Rajesh Shah } 3041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 3051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 3061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 307bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lustatic void __assign_resources_sorted(struct list_head *head, 308bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu struct list_head *realloc_head, 309bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu struct list_head *fail_head) 310c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai{ 3113e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu /* 3123e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu * Should not assign requested resources at first. 3133e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu * they could be adjacent, so later reassign can not reallocate 3143e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu * them one by one in parent resource window. 3153e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu * Try to assign requested + add_size at begining 3163e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu * if could do that, could get out early. 3173e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu * if could not do that, we still try to assign requested at first, 3183e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu * then try to reassign add_size for some resources. 3193e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu */ 320bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu LIST_HEAD(save_head); 321bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu LIST_HEAD(local_fail_head); 322b9b0bba96cf5acbf025f7829fbf6c09e74323b41Yinghai Lu struct pci_dev_resource *save_res; 323bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu struct pci_dev_resource *dev_res; 3243e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu 3253e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu /* Check if optional add_size is there */ 326bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu if (!realloc_head || list_empty(realloc_head)) 3273e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu goto requested_and_reassign; 3283e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu 3293e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu /* Save original start, end, flags etc at first */ 330bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu list_for_each_entry(dev_res, head, list) { 331bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu if (add_to_list(&save_head, dev_res->dev, dev_res->res, 0, 0)) { 332bffc56d41102705d809f88c29918a9c33d2900f7Yinghai Lu free_list(&save_head); 3333e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu goto requested_and_reassign; 3343e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu } 335bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu } 3363e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu 3373e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu /* Update res in head list with add_size in realloc_head list */ 338bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu list_for_each_entry(dev_res, head, list) 339bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu dev_res->res->end += get_res_add_size(realloc_head, 340bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu dev_res->res); 3413e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu 3423e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu /* Try updated head list with add_size added */ 3433e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu assign_requested_resources_sorted(head, &local_fail_head); 3443e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu 3453e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu /* all assigned with add_size ? */ 346bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu if (list_empty(&local_fail_head)) { 3473e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu /* Remove head list from realloc_head list */ 348bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu list_for_each_entry(dev_res, head, list) 349bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu remove_from_list(realloc_head, dev_res->res); 350bffc56d41102705d809f88c29918a9c33d2900f7Yinghai Lu free_list(&save_head); 351bffc56d41102705d809f88c29918a9c33d2900f7Yinghai Lu free_list(head); 3523e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu return; 3533e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu } 3543e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu 355bffc56d41102705d809f88c29918a9c33d2900f7Yinghai Lu free_list(&local_fail_head); 3563e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu /* Release assigned resource */ 357bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu list_for_each_entry(dev_res, head, list) 358bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu if (dev_res->res->parent) 359bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu release_resource(dev_res->res); 3603e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu /* Restore start/end/flags from saved list */ 361b9b0bba96cf5acbf025f7829fbf6c09e74323b41Yinghai Lu list_for_each_entry(save_res, &save_head, list) { 362b9b0bba96cf5acbf025f7829fbf6c09e74323b41Yinghai Lu struct resource *res = save_res->res; 3633e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu 364b9b0bba96cf5acbf025f7829fbf6c09e74323b41Yinghai Lu res->start = save_res->start; 365b9b0bba96cf5acbf025f7829fbf6c09e74323b41Yinghai Lu res->end = save_res->end; 366b9b0bba96cf5acbf025f7829fbf6c09e74323b41Yinghai Lu res->flags = save_res->flags; 3673e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu } 368bffc56d41102705d809f88c29918a9c33d2900f7Yinghai Lu free_list(&save_head); 3693e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu 3703e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lurequested_and_reassign: 371c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai /* Satisfy the must-have resource requests */ 372c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai assign_requested_resources_sorted(head, fail_head); 373c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai 3740a2daa1cf35004f5adbf4138555cc5669abf3a3eRam Pai /* Try to satisfy any additional optional resource 375c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai requests */ 3769e8bf93a7f416a3fa8fb6d76177d90e67bd45496Ram Pai if (realloc_head) 3779e8bf93a7f416a3fa8fb6d76177d90e67bd45496Ram Pai reassign_resources_sorted(realloc_head, head); 378bffc56d41102705d809f88c29918a9c33d2900f7Yinghai Lu free_list(head); 379c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai} 380c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai 3816841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lustatic void pdev_assign_resources_sorted(struct pci_dev *dev, 382bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu struct list_head *add_head, 383bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu struct list_head *fail_head) 3846841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu{ 385bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu LIST_HEAD(head); 3866841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu 3876841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu __dev_sort_resources(dev, &head); 3888424d7592eab8245b51051ee458e598213bca3b2Yinghai Lu __assign_resources_sorted(&head, add_head, fail_head); 3896841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu 3906841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu} 3916841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu 3926841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lustatic void pbus_assign_resources_sorted(const struct pci_bus *bus, 393bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu struct list_head *realloc_head, 394bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu struct list_head *fail_head) 3956841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu{ 3966841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu struct pci_dev *dev; 397bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu LIST_HEAD(head); 3986841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu 3996841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu list_for_each_entry(dev, &bus->devices, bus_list) 4006841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu __dev_sort_resources(dev, &head); 4016841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu 4029e8bf93a7f416a3fa8fb6d76177d90e67bd45496Ram Pai __assign_resources_sorted(&head, realloc_head, fail_head); 4036841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu} 4046841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu 405b3743fa4442fc172e950ff0eaf6aa96e7d5ce9beDominik Brodowskivoid pci_setup_cardbus(struct pci_bus *bus) 4061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 4071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct pci_dev *bridge = bus->self; 408c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas struct resource *res; 4091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct pci_bus_region region; 4101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 411865df576e8fc70daf297b53e61a4fbefc719d065Bjorn Helgaas dev_info(&bridge->dev, "CardBus bridge to [bus %02x-%02x]\n", 412865df576e8fc70daf297b53e61a4fbefc719d065Bjorn Helgaas bus->secondary, bus->subordinate); 4131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 414c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas res = bus->resource[0]; 415c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas pcibios_resource_to_bus(bridge, ®ion, res); 416c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas if (res->flags & IORESOURCE_IO) { 4171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* 4181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * The IO resource is allocated a range twice as large as it 4191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * would normally need. This allows us to set both IO regs. 4201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 421c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas dev_info(&bridge->dev, " bridge window %pR\n", res); 4221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_write_config_dword(bridge, PCI_CB_IO_BASE_0, 4231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds region.start); 4241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_write_config_dword(bridge, PCI_CB_IO_LIMIT_0, 4251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds region.end); 4261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 4271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 428c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas res = bus->resource[1]; 429c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas pcibios_resource_to_bus(bridge, ®ion, res); 430c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas if (res->flags & IORESOURCE_IO) { 431c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas dev_info(&bridge->dev, " bridge window %pR\n", res); 4321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_write_config_dword(bridge, PCI_CB_IO_BASE_1, 4331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds region.start); 4341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_write_config_dword(bridge, PCI_CB_IO_LIMIT_1, 4351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds region.end); 4361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 4371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 438c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas res = bus->resource[2]; 439c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas pcibios_resource_to_bus(bridge, ®ion, res); 440c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas if (res->flags & IORESOURCE_MEM) { 441c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas dev_info(&bridge->dev, " bridge window %pR\n", res); 4421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_write_config_dword(bridge, PCI_CB_MEMORY_BASE_0, 4431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds region.start); 4441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_write_config_dword(bridge, PCI_CB_MEMORY_LIMIT_0, 4451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds region.end); 4461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 4471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 448c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas res = bus->resource[3]; 449c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas pcibios_resource_to_bus(bridge, ®ion, res); 450c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas if (res->flags & IORESOURCE_MEM) { 451c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas dev_info(&bridge->dev, " bridge window %pR\n", res); 4521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_write_config_dword(bridge, PCI_CB_MEMORY_BASE_1, 4531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds region.start); 4541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_write_config_dword(bridge, PCI_CB_MEMORY_LIMIT_1, 4551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds region.end); 4561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 4571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 458b3743fa4442fc172e950ff0eaf6aa96e7d5ce9beDominik BrodowskiEXPORT_SYMBOL(pci_setup_cardbus); 4591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* Initialize bridges with base/limit values we have collected. 4611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds PCI-to-PCI Bridge Architecture Specification rev. 1.1 (1998) 4621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds requires that if there is no I/O ports or memory behind the 4631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bridge, corresponding range must be turned off by writing base 4641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds value greater than limit to the bridge's base/limit registers. 4651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds Note: care must be taken when updating I/O base/limit registers 4671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds of bridges which support 32-bit I/O. This update requires two 4681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds config space writes, so it's quite possible that an I/O window of 4691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds the bridge will have some undesirable address (e.g. 0) after the 4701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds first write. Ditto 64-bit prefetchable MMIO. */ 4717cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lustatic void pci_setup_bridge_io(struct pci_bus *bus) 4721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 4731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct pci_dev *bridge = bus->self; 474c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas struct resource *res; 4751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct pci_bus_region region; 4767cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu u32 l, io_upper16; 4771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Set up the top and bottom of the PCI I/O segment for this bus. */ 479c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas res = bus->resource[0]; 480c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas pcibios_resource_to_bus(bridge, ®ion, res); 481c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas if (res->flags & IORESOURCE_IO) { 4821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_read_config_dword(bridge, PCI_IO_BASE, &l); 4831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds l &= 0xffff0000; 4841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds l |= (region.start >> 8) & 0x00f0; 4851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds l |= region.end & 0xf000; 4861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Set up upper 16 bits of I/O base/limit. */ 4871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds io_upper16 = (region.end & 0xffff0000) | (region.start >> 16); 488c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas dev_info(&bridge->dev, " bridge window %pR\n", res); 4897cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu } else { 4901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Clear upper 16 bits of I/O base/limit. */ 4911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds io_upper16 = 0; 4921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds l = 0x00f0; 4931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 4941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Temporarily disable the I/O range before updating PCI_IO_BASE. */ 4951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_write_config_dword(bridge, PCI_IO_BASE_UPPER16, 0x0000ffff); 4961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Update lower 16 bits of I/O base/limit. */ 4971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_write_config_dword(bridge, PCI_IO_BASE, l); 4981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Update upper 16 bits of I/O base/limit. */ 4991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_write_config_dword(bridge, PCI_IO_BASE_UPPER16, io_upper16); 5007cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu} 5017cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu 5027cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lustatic void pci_setup_bridge_mmio(struct pci_bus *bus) 5037cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu{ 5047cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu struct pci_dev *bridge = bus->self; 5057cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu struct resource *res; 5067cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu struct pci_bus_region region; 5077cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu u32 l; 5081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5097cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu /* Set up the top and bottom of the PCI Memory segment for this bus. */ 510c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas res = bus->resource[1]; 511c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas pcibios_resource_to_bus(bridge, ®ion, res); 512c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas if (res->flags & IORESOURCE_MEM) { 5131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds l = (region.start >> 16) & 0xfff0; 5141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds l |= region.end & 0xfff00000; 515c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas dev_info(&bridge->dev, " bridge window %pR\n", res); 5167cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu } else { 5171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds l = 0x0000fff0; 5181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 5191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_write_config_dword(bridge, PCI_MEMORY_BASE, l); 5207cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu} 5217cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu 5227cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lustatic void pci_setup_bridge_mmio_pref(struct pci_bus *bus) 5237cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu{ 5247cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu struct pci_dev *bridge = bus->self; 5257cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu struct resource *res; 5267cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu struct pci_bus_region region; 5277cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu u32 l, bu, lu; 5281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Clear out the upper 32 bits of PREF limit. 5301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds If PCI_PREF_BASE_UPPER32 was non-zero, this temporarily 5311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds disables PREF range, which is ok. */ 5321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_write_config_dword(bridge, PCI_PREF_LIMIT_UPPER32, 0); 5331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Set up PREF base/limit. */ 535c40a22e0ce5eb400f27449e59e43d021bee58b8dBenjamin Herrenschmidt bu = lu = 0; 536c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas res = bus->resource[2]; 537c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas pcibios_resource_to_bus(bridge, ®ion, res); 538c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas if (res->flags & IORESOURCE_PREFETCH) { 5391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds l = (region.start >> 16) & 0xfff0; 5401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds l |= region.end & 0xfff00000; 541c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas if (res->flags & IORESOURCE_MEM_64) { 5421f82de10d6b1d845155363c895c552e61b36b51aYinghai Lu bu = upper_32_bits(region.start); 5431f82de10d6b1d845155363c895c552e61b36b51aYinghai Lu lu = upper_32_bits(region.end); 5441f82de10d6b1d845155363c895c552e61b36b51aYinghai Lu } 545c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas dev_info(&bridge->dev, " bridge window %pR\n", res); 5467cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu } else { 5471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds l = 0x0000fff0; 5481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 5491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_write_config_dword(bridge, PCI_PREF_MEMORY_BASE, l); 5501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 55159353ea30e65ab3ae181d6175e3212e1361c3787Alex Williamson /* Set the upper 32 bits of PREF base & limit. */ 55259353ea30e65ab3ae181d6175e3212e1361c3787Alex Williamson pci_write_config_dword(bridge, PCI_PREF_BASE_UPPER32, bu); 55359353ea30e65ab3ae181d6175e3212e1361c3787Alex Williamson pci_write_config_dword(bridge, PCI_PREF_LIMIT_UPPER32, lu); 5547cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu} 5557cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu 5567cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lustatic void __pci_setup_bridge(struct pci_bus *bus, unsigned long type) 5577cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu{ 5587cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu struct pci_dev *bridge = bus->self; 5597cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu 5607cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu dev_info(&bridge->dev, "PCI bridge to [bus %02x-%02x]\n", 5617cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu bus->secondary, bus->subordinate); 5627cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu 5637cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu if (type & IORESOURCE_IO) 5647cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu pci_setup_bridge_io(bus); 5657cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu 5667cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu if (type & IORESOURCE_MEM) 5677cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu pci_setup_bridge_mmio(bus); 5687cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu 5697cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu if (type & IORESOURCE_PREFETCH) 5707cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu pci_setup_bridge_mmio_pref(bus); 5711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_write_config_word(bridge, PCI_BRIDGE_CONTROL, bus->bridge_ctl); 5731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 5741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 575e24442733ee486c99d03fe2ecd98924d1bc14c51Benjamin Herrenschmidtvoid pci_setup_bridge(struct pci_bus *bus) 5767cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu{ 5777cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu unsigned long type = IORESOURCE_IO | IORESOURCE_MEM | 5787cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu IORESOURCE_PREFETCH; 5797cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu 5807cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu __pci_setup_bridge(bus, type); 5817cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu} 5827cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu 5831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* Check whether the bridge supports optional I/O and 5841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds prefetchable memory ranges. If not, the respective 5851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds base/limit registers must be read-only and read as 0. */ 58696bde06a2df1b363206d3cdef53134b84ff37813Sam Ravnborgstatic void pci_bridge_check_ranges(struct pci_bus *bus) 5871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 5881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u16 io; 5891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u32 pmem; 5901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct pci_dev *bridge = bus->self; 5911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct resource *b_res; 5921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds b_res = &bridge->resource[PCI_BRIDGE_RESOURCES]; 5941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds b_res[1].flags |= IORESOURCE_MEM; 5951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_read_config_word(bridge, PCI_IO_BASE, &io); 5971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!io) { 5981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_write_config_word(bridge, PCI_IO_BASE, 0xf0f0); 5991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_read_config_word(bridge, PCI_IO_BASE, &io); 6001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_write_config_word(bridge, PCI_IO_BASE, 0x0); 6011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 6021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (io) 6031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds b_res[0].flags |= IORESOURCE_IO; 6041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* DECchip 21050 pass 2 errata: the bridge may miss an address 6051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds disconnect boundary by one PCI data phase. 6061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds Workaround: do not use prefetching on this device. */ 6071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (bridge->vendor == PCI_VENDOR_ID_DEC && bridge->device == 0x0001) 6081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return; 6091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_read_config_dword(bridge, PCI_PREF_MEMORY_BASE, &pmem); 6101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!pmem) { 6111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_write_config_dword(bridge, PCI_PREF_MEMORY_BASE, 6121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0xfff0fff0); 6131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_read_config_dword(bridge, PCI_PREF_MEMORY_BASE, &pmem); 6141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_write_config_dword(bridge, PCI_PREF_MEMORY_BASE, 0x0); 6151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 6161f82de10d6b1d845155363c895c552e61b36b51aYinghai Lu if (pmem) { 6171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds b_res[2].flags |= IORESOURCE_MEM | IORESOURCE_PREFETCH; 6189958610552c0bd7558b41cb8addbd865587f142aYinghai Lu if ((pmem & PCI_PREF_RANGE_TYPE_MASK) == 6199958610552c0bd7558b41cb8addbd865587f142aYinghai Lu PCI_PREF_RANGE_TYPE_64) { 6201f82de10d6b1d845155363c895c552e61b36b51aYinghai Lu b_res[2].flags |= IORESOURCE_MEM_64; 6219958610552c0bd7558b41cb8addbd865587f142aYinghai Lu b_res[2].flags |= PCI_PREF_RANGE_TYPE_64; 6229958610552c0bd7558b41cb8addbd865587f142aYinghai Lu } 6231f82de10d6b1d845155363c895c552e61b36b51aYinghai Lu } 6241f82de10d6b1d845155363c895c552e61b36b51aYinghai Lu 6251f82de10d6b1d845155363c895c552e61b36b51aYinghai Lu /* double check if bridge does support 64 bit pref */ 6261f82de10d6b1d845155363c895c552e61b36b51aYinghai Lu if (b_res[2].flags & IORESOURCE_MEM_64) { 6271f82de10d6b1d845155363c895c552e61b36b51aYinghai Lu u32 mem_base_hi, tmp; 6281f82de10d6b1d845155363c895c552e61b36b51aYinghai Lu pci_read_config_dword(bridge, PCI_PREF_BASE_UPPER32, 6291f82de10d6b1d845155363c895c552e61b36b51aYinghai Lu &mem_base_hi); 6301f82de10d6b1d845155363c895c552e61b36b51aYinghai Lu pci_write_config_dword(bridge, PCI_PREF_BASE_UPPER32, 6311f82de10d6b1d845155363c895c552e61b36b51aYinghai Lu 0xffffffff); 6321f82de10d6b1d845155363c895c552e61b36b51aYinghai Lu pci_read_config_dword(bridge, PCI_PREF_BASE_UPPER32, &tmp); 6331f82de10d6b1d845155363c895c552e61b36b51aYinghai Lu if (!tmp) 6341f82de10d6b1d845155363c895c552e61b36b51aYinghai Lu b_res[2].flags &= ~IORESOURCE_MEM_64; 6351f82de10d6b1d845155363c895c552e61b36b51aYinghai Lu pci_write_config_dword(bridge, PCI_PREF_BASE_UPPER32, 6361f82de10d6b1d845155363c895c552e61b36b51aYinghai Lu mem_base_hi); 6371f82de10d6b1d845155363c895c552e61b36b51aYinghai Lu } 6381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 6391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* Helper function for sizing routines: find first available 6411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bus resource of a given type. Note: we intentionally skip 6421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds the bus resources which have already been assigned (that is, 6431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds have non-NULL parent resource). */ 64496bde06a2df1b363206d3cdef53134b84ff37813Sam Ravnborgstatic struct resource *find_free_bus_resource(struct pci_bus *bus, unsigned long type) 6451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 6461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int i; 6471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct resource *r; 6481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long type_mask = IORESOURCE_IO | IORESOURCE_MEM | 6491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds IORESOURCE_PREFETCH; 6501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 65189a74ecccd1f78e51faf6287e5c0e93a92ac096eBjorn Helgaas pci_bus_for_each_resource(bus, r, i) { 652299de0343c7d18448a69c635378342e9214b14afIvan Kokshaysky if (r == &ioport_resource || r == &iomem_resource) 653299de0343c7d18448a69c635378342e9214b14afIvan Kokshaysky continue; 65455a1098476619d5d8f4cdae7240ea759274dead7Jesse Barnes if (r && (r->flags & type_mask) == type && !r->parent) 65555a1098476619d5d8f4cdae7240ea759274dead7Jesse Barnes return r; 6561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 6571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return NULL; 6581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 6591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 66013583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Paistatic resource_size_t calculate_iosize(resource_size_t size, 66113583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai resource_size_t min_size, 66213583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai resource_size_t size1, 66313583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai resource_size_t old_size, 66413583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai resource_size_t align) 66513583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai{ 66613583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai if (size < min_size) 66713583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai size = min_size; 66813583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai if (old_size == 1 ) 66913583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai old_size = 0; 67013583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai /* To be fixed in 2.5: we should have sort of HAVE_ISA 67113583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai flag in the struct pci_bus. */ 67213583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai#if defined(CONFIG_ISA) || defined(CONFIG_EISA) 67313583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai size = (size & 0xff) + ((size & ~0xffUL) << 2); 67413583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai#endif 67513583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai size = ALIGN(size + size1, align); 67613583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai if (size < old_size) 67713583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai size = old_size; 67813583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai return size; 67913583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai} 68013583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai 68113583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Paistatic resource_size_t calculate_memsize(resource_size_t size, 68213583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai resource_size_t min_size, 68313583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai resource_size_t size1, 68413583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai resource_size_t old_size, 68513583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai resource_size_t align) 68613583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai{ 68713583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai if (size < min_size) 68813583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai size = min_size; 68913583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai if (old_size == 1 ) 69013583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai old_size = 0; 69113583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai if (size < old_size) 69213583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai size = old_size; 69313583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai size = ALIGN(size + size1, align); 69413583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai return size; 69513583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai} 69613583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai 697c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai/** 698c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * pbus_size_io() - size the io window of a given bus 699c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * 700c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * @bus : the bus 701c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * @min_size : the minimum io window that must to be allocated 702c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * @add_size : additional optional io window 7039e8bf93a7f416a3fa8fb6d76177d90e67bd45496Ram Pai * @realloc_head : track the additional io window on this list 704c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * 705c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * Sizing the IO windows of the PCI-PCI bridge is trivial, 706c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * since these windows have 4K granularity and the IO ranges 707c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * of non-bridge PCI devices are limited to 256 bytes. 708c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * We must be careful with the ISA aliasing though. 709c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai */ 710c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Paistatic void pbus_size_io(struct pci_bus *bus, resource_size_t min_size, 711bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu resource_size_t add_size, struct list_head *realloc_head) 7121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 7131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct pci_dev *dev; 7141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct resource *b_res = find_free_bus_resource(bus, IORESOURCE_IO); 715c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai unsigned long size = 0, size0 = 0, size1 = 0; 716be768912a49b10b68e96fbd8fa3cab0adfbd3091Yinghai Lu resource_size_t children_add_size = 0; 7171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!b_res) 7191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return; 7201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds list_for_each_entry(dev, &bus->devices, bus_list) { 7221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int i; 7231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (i = 0; i < PCI_NUM_RESOURCES; i++) { 7251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct resource *r = &dev->resource[i]; 7261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long r_size; 7271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (r->parent || !(r->flags & IORESOURCE_IO)) 7291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds continue; 730022edd86d7c864bc8fadc3c8ac4e6a464472ab05Zhao, Yu r_size = resource_size(r); 7311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (r_size < 0x400) 7331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Might be re-aligned for ISA */ 7341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds size += r_size; 7351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 7361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds size1 += r_size; 737be768912a49b10b68e96fbd8fa3cab0adfbd3091Yinghai Lu 7389e8bf93a7f416a3fa8fb6d76177d90e67bd45496Ram Pai if (realloc_head) 7399e8bf93a7f416a3fa8fb6d76177d90e67bd45496Ram Pai children_add_size += get_res_add_size(realloc_head, r); 7401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 7411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 742c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai size0 = calculate_iosize(size, min_size, size1, 743c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai resource_size(b_res), 4096); 744be768912a49b10b68e96fbd8fa3cab0adfbd3091Yinghai Lu if (children_add_size > add_size) 745be768912a49b10b68e96fbd8fa3cab0adfbd3091Yinghai Lu add_size = children_add_size; 7469e8bf93a7f416a3fa8fb6d76177d90e67bd45496Ram Pai size1 = (!realloc_head || (realloc_head && !add_size)) ? size0 : 747a4ac9fea016fc5c09227eb479bd35e34978323a4Yinghai Lu calculate_iosize(size, min_size, add_size + size1, 74813583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai resource_size(b_res), 4096); 749c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai if (!size0 && !size1) { 750865df576e8fc70daf297b53e61a4fbefc719d065Bjorn Helgaas if (b_res->start || b_res->end) 751865df576e8fc70daf297b53e61a4fbefc719d065Bjorn Helgaas dev_info(&bus->self->dev, "disabling bridge window " 752865df576e8fc70daf297b53e61a4fbefc719d065Bjorn Helgaas "%pR to [bus %02x-%02x] (unused)\n", b_res, 753865df576e8fc70daf297b53e61a4fbefc719d065Bjorn Helgaas bus->secondary, bus->subordinate); 7541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds b_res->flags = 0; 7551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return; 7561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 7571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Alignment of the IO window is always 4K */ 7581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds b_res->start = 4096; 759c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai b_res->end = b_res->start + size0 - 1; 760884525655d07fdee9245716b998ecdc45cdd8007Ivan Kokshaysky b_res->flags |= IORESOURCE_STARTALIGN; 761b592443d9045f0880eb4d8cc9125075744db4b9eYinghai Lu if (size1 > size0 && realloc_head) { 7629e8bf93a7f416a3fa8fb6d76177d90e67bd45496Ram Pai add_to_list(realloc_head, bus->self, b_res, size1-size0, 4096); 763b592443d9045f0880eb4d8cc9125075744db4b9eYinghai Lu dev_printk(KERN_DEBUG, &bus->self->dev, "bridge window " 764b592443d9045f0880eb4d8cc9125075744db4b9eYinghai Lu "%pR to [bus %02x-%02x] add_size %lx\n", b_res, 765b592443d9045f0880eb4d8cc9125075744db4b9eYinghai Lu bus->secondary, bus->subordinate, size1-size0); 766b592443d9045f0880eb4d8cc9125075744db4b9eYinghai Lu } 7671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 7681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 769c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai/** 770c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * pbus_size_mem() - size the memory window of a given bus 771c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * 772c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * @bus : the bus 773c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * @min_size : the minimum memory window that must to be allocated 774c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * @add_size : additional optional memory window 7759e8bf93a7f416a3fa8fb6d76177d90e67bd45496Ram Pai * @realloc_head : track the additional memory window on this list 776c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * 777c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * Calculate the size of the bus and minimal alignment which 778c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * guarantees that all child resources fit in this size. 779c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai */ 78028760489a3f1e136c5ae8581c0fa8f63511f2f4cEric W. Biedermanstatic int pbus_size_mem(struct pci_bus *bus, unsigned long mask, 781c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai unsigned long type, resource_size_t min_size, 782c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai resource_size_t add_size, 783bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu struct list_head *realloc_head) 7841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 7851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct pci_dev *dev; 786c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai resource_size_t min_align, align, size, size0, size1; 787c40a22e0ce5eb400f27449e59e43d021bee58b8dBenjamin Herrenschmidt resource_size_t aligns[12]; /* Alignments from 1Mb to 2Gb */ 7881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int order, max_order; 7891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct resource *b_res = find_free_bus_resource(bus, type); 7901f82de10d6b1d845155363c895c552e61b36b51aYinghai Lu unsigned int mem64_mask = 0; 791be768912a49b10b68e96fbd8fa3cab0adfbd3091Yinghai Lu resource_size_t children_add_size = 0; 7921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!b_res) 7941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 7951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds memset(aligns, 0, sizeof(aligns)); 7971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds max_order = 0; 7981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds size = 0; 7991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8001f82de10d6b1d845155363c895c552e61b36b51aYinghai Lu mem64_mask = b_res->flags & IORESOURCE_MEM_64; 8011f82de10d6b1d845155363c895c552e61b36b51aYinghai Lu b_res->flags &= ~IORESOURCE_MEM_64; 8021f82de10d6b1d845155363c895c552e61b36b51aYinghai Lu 8031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds list_for_each_entry(dev, &bus->devices, bus_list) { 8041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int i; 8051f82de10d6b1d845155363c895c552e61b36b51aYinghai Lu 8061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (i = 0; i < PCI_NUM_RESOURCES; i++) { 8071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct resource *r = &dev->resource[i]; 808c40a22e0ce5eb400f27449e59e43d021bee58b8dBenjamin Herrenschmidt resource_size_t r_size; 8091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (r->parent || (r->flags & mask) != type) 8111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds continue; 812022edd86d7c864bc8fadc3c8ac4e6a464472ab05Zhao, Yu r_size = resource_size(r); 8132aceefcbd5a73059e5f52831817ec277e987440dYinghai Lu#ifdef CONFIG_PCI_IOV 8142aceefcbd5a73059e5f52831817ec277e987440dYinghai Lu /* put SRIOV requested res to the optional list */ 8159e8bf93a7f416a3fa8fb6d76177d90e67bd45496Ram Pai if (realloc_head && i >= PCI_IOV_RESOURCES && 8162aceefcbd5a73059e5f52831817ec277e987440dYinghai Lu i <= PCI_IOV_RESOURCE_END) { 8172aceefcbd5a73059e5f52831817ec277e987440dYinghai Lu r->end = r->start - 1; 8189e8bf93a7f416a3fa8fb6d76177d90e67bd45496Ram Pai add_to_list(realloc_head, dev, r, r_size, 0/* dont' care */); 8192aceefcbd5a73059e5f52831817ec277e987440dYinghai Lu children_add_size += r_size; 8202aceefcbd5a73059e5f52831817ec277e987440dYinghai Lu continue; 8212aceefcbd5a73059e5f52831817ec277e987440dYinghai Lu } 8222aceefcbd5a73059e5f52831817ec277e987440dYinghai Lu#endif 8231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* For bridges size != alignment */ 8246faf17f6f1ffc586d16efc2f9fa2083a7785ee74Chris Wright align = pci_resource_alignment(dev, r); 8251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds order = __ffs(align) - 20; 8261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (order > 11) { 827865df576e8fc70daf297b53e61a4fbefc719d065Bjorn Helgaas dev_warn(&dev->dev, "disabling BAR %d: %pR " 828865df576e8fc70daf297b53e61a4fbefc719d065Bjorn Helgaas "(bad alignment %#llx)\n", i, r, 829865df576e8fc70daf297b53e61a4fbefc719d065Bjorn Helgaas (unsigned long long) align); 8301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds r->flags = 0; 8311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds continue; 8321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 8331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds size += r_size; 8341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (order < 0) 8351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds order = 0; 8361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Exclude ranges with size > align from 8371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds calculation of the alignment. */ 8381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (r_size == align) 8391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds aligns[order] += align; 8401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (order > max_order) 8411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds max_order = order; 8421f82de10d6b1d845155363c895c552e61b36b51aYinghai Lu mem64_mask &= r->flags & IORESOURCE_MEM_64; 843be768912a49b10b68e96fbd8fa3cab0adfbd3091Yinghai Lu 8449e8bf93a7f416a3fa8fb6d76177d90e67bd45496Ram Pai if (realloc_head) 8459e8bf93a7f416a3fa8fb6d76177d90e67bd45496Ram Pai children_add_size += get_res_add_size(realloc_head, r); 8461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 8471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 8481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds align = 0; 8491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds min_align = 0; 8501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (order = 0; order <= max_order; order++) { 8518308c54d7e312f7a03e2ce2057d0837e6fe3843fJeremy Fitzhardinge resource_size_t align1 = 1; 8528308c54d7e312f7a03e2ce2057d0837e6fe3843fJeremy Fitzhardinge 8538308c54d7e312f7a03e2ce2057d0837e6fe3843fJeremy Fitzhardinge align1 <<= (order + 20); 8548308c54d7e312f7a03e2ce2057d0837e6fe3843fJeremy Fitzhardinge 8551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!align) 8561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds min_align = align1; 8576f6f8c2f4b59711857d14ada8e70309d52e8fae4Milind Arun Choudhary else if (ALIGN(align + min_align, min_align) < align1) 8581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds min_align = align1 >> 1; 8591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds align += aligns[order]; 8601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 861b42282e5a05018ecdc0d63a4ad530b0999785912Linus Torvalds size0 = calculate_memsize(size, min_size, 0, resource_size(b_res), min_align); 862be768912a49b10b68e96fbd8fa3cab0adfbd3091Yinghai Lu if (children_add_size > add_size) 863be768912a49b10b68e96fbd8fa3cab0adfbd3091Yinghai Lu add_size = children_add_size; 8649e8bf93a7f416a3fa8fb6d76177d90e67bd45496Ram Pai size1 = (!realloc_head || (realloc_head && !add_size)) ? size0 : 865a4ac9fea016fc5c09227eb479bd35e34978323a4Yinghai Lu calculate_memsize(size, min_size, add_size, 866b42282e5a05018ecdc0d63a4ad530b0999785912Linus Torvalds resource_size(b_res), min_align); 867c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai if (!size0 && !size1) { 868865df576e8fc70daf297b53e61a4fbefc719d065Bjorn Helgaas if (b_res->start || b_res->end) 869865df576e8fc70daf297b53e61a4fbefc719d065Bjorn Helgaas dev_info(&bus->self->dev, "disabling bridge window " 870865df576e8fc70daf297b53e61a4fbefc719d065Bjorn Helgaas "%pR to [bus %02x-%02x] (unused)\n", b_res, 871865df576e8fc70daf297b53e61a4fbefc719d065Bjorn Helgaas bus->secondary, bus->subordinate); 8721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds b_res->flags = 0; 8731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 1; 8741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 8751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds b_res->start = min_align; 876c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai b_res->end = size0 + min_align - 1; 877c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai b_res->flags |= IORESOURCE_STARTALIGN | mem64_mask; 878b592443d9045f0880eb4d8cc9125075744db4b9eYinghai Lu if (size1 > size0 && realloc_head) { 8799e8bf93a7f416a3fa8fb6d76177d90e67bd45496Ram Pai add_to_list(realloc_head, bus->self, b_res, size1-size0, min_align); 880b592443d9045f0880eb4d8cc9125075744db4b9eYinghai Lu dev_printk(KERN_DEBUG, &bus->self->dev, "bridge window " 881b592443d9045f0880eb4d8cc9125075744db4b9eYinghai Lu "%pR to [bus %02x-%02x] add_size %llx\n", b_res, 882b592443d9045f0880eb4d8cc9125075744db4b9eYinghai Lu bus->secondary, bus->subordinate, (unsigned long long)size1-size0); 883b592443d9045f0880eb4d8cc9125075744db4b9eYinghai Lu } 8841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 1; 8851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 8861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8870a2daa1cf35004f5adbf4138555cc5669abf3a3eRam Paiunsigned long pci_cardbus_resource_alignment(struct resource *res) 8880a2daa1cf35004f5adbf4138555cc5669abf3a3eRam Pai{ 8890a2daa1cf35004f5adbf4138555cc5669abf3a3eRam Pai if (res->flags & IORESOURCE_IO) 8900a2daa1cf35004f5adbf4138555cc5669abf3a3eRam Pai return pci_cardbus_io_size; 8910a2daa1cf35004f5adbf4138555cc5669abf3a3eRam Pai if (res->flags & IORESOURCE_MEM) 8920a2daa1cf35004f5adbf4138555cc5669abf3a3eRam Pai return pci_cardbus_mem_size; 8930a2daa1cf35004f5adbf4138555cc5669abf3a3eRam Pai return 0; 8940a2daa1cf35004f5adbf4138555cc5669abf3a3eRam Pai} 8950a2daa1cf35004f5adbf4138555cc5669abf3a3eRam Pai 8960a2daa1cf35004f5adbf4138555cc5669abf3a3eRam Paistatic void pci_bus_size_cardbus(struct pci_bus *bus, 897bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu struct list_head *realloc_head) 8981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 8991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct pci_dev *bridge = bus->self; 9001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct resource *b_res = &bridge->resource[PCI_BRIDGE_RESOURCES]; 9011184893439b1a7532b579a85a354db12bbf1b277Yinghai Lu resource_size_t b_res_3_size = pci_cardbus_mem_size * 2; 9021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u16 ctrl; 9031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9043796f1e2ca38deebd30aa755ea52562b6926c73eYinghai Lu if (b_res[0].parent) 9053796f1e2ca38deebd30aa755ea52562b6926c73eYinghai Lu goto handle_b_res_1; 9061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* 9071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Reserve some resources for CardBus. We reserve 9081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * a fixed amount of bus space for CardBus bridges. 9091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 9101184893439b1a7532b579a85a354db12bbf1b277Yinghai Lu b_res[0].start = pci_cardbus_io_size; 9111184893439b1a7532b579a85a354db12bbf1b277Yinghai Lu b_res[0].end = b_res[0].start + pci_cardbus_io_size - 1; 9121184893439b1a7532b579a85a354db12bbf1b277Yinghai Lu b_res[0].flags |= IORESOURCE_IO | IORESOURCE_STARTALIGN; 9131184893439b1a7532b579a85a354db12bbf1b277Yinghai Lu if (realloc_head) { 9141184893439b1a7532b579a85a354db12bbf1b277Yinghai Lu b_res[0].end -= pci_cardbus_io_size; 9151184893439b1a7532b579a85a354db12bbf1b277Yinghai Lu add_to_list(realloc_head, bridge, b_res, pci_cardbus_io_size, 9161184893439b1a7532b579a85a354db12bbf1b277Yinghai Lu pci_cardbus_io_size); 9171184893439b1a7532b579a85a354db12bbf1b277Yinghai Lu } 9181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9193796f1e2ca38deebd30aa755ea52562b6926c73eYinghai Luhandle_b_res_1: 9203796f1e2ca38deebd30aa755ea52562b6926c73eYinghai Lu if (b_res[1].parent) 9213796f1e2ca38deebd30aa755ea52562b6926c73eYinghai Lu goto handle_b_res_2; 9221184893439b1a7532b579a85a354db12bbf1b277Yinghai Lu b_res[1].start = pci_cardbus_io_size; 9231184893439b1a7532b579a85a354db12bbf1b277Yinghai Lu b_res[1].end = b_res[1].start + pci_cardbus_io_size - 1; 9241184893439b1a7532b579a85a354db12bbf1b277Yinghai Lu b_res[1].flags |= IORESOURCE_IO | IORESOURCE_STARTALIGN; 9251184893439b1a7532b579a85a354db12bbf1b277Yinghai Lu if (realloc_head) { 9261184893439b1a7532b579a85a354db12bbf1b277Yinghai Lu b_res[1].end -= pci_cardbus_io_size; 9271184893439b1a7532b579a85a354db12bbf1b277Yinghai Lu add_to_list(realloc_head, bridge, b_res+1, pci_cardbus_io_size, 9281184893439b1a7532b579a85a354db12bbf1b277Yinghai Lu pci_cardbus_io_size); 9291184893439b1a7532b579a85a354db12bbf1b277Yinghai Lu } 9301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9313796f1e2ca38deebd30aa755ea52562b6926c73eYinghai Luhandle_b_res_2: 932dcef0d06b34a80071da4496556e85f9bf3b3c0bfYinghai Lu /* MEM1 must not be pref mmio */ 933dcef0d06b34a80071da4496556e85f9bf3b3c0bfYinghai Lu pci_read_config_word(bridge, PCI_CB_BRIDGE_CONTROL, &ctrl); 934dcef0d06b34a80071da4496556e85f9bf3b3c0bfYinghai Lu if (ctrl & PCI_CB_BRIDGE_CTL_PREFETCH_MEM1) { 935dcef0d06b34a80071da4496556e85f9bf3b3c0bfYinghai Lu ctrl &= ~PCI_CB_BRIDGE_CTL_PREFETCH_MEM1; 936dcef0d06b34a80071da4496556e85f9bf3b3c0bfYinghai Lu pci_write_config_word(bridge, PCI_CB_BRIDGE_CONTROL, ctrl); 937dcef0d06b34a80071da4496556e85f9bf3b3c0bfYinghai Lu pci_read_config_word(bridge, PCI_CB_BRIDGE_CONTROL, &ctrl); 938dcef0d06b34a80071da4496556e85f9bf3b3c0bfYinghai Lu } 939dcef0d06b34a80071da4496556e85f9bf3b3c0bfYinghai Lu 9401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* 9411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Check whether prefetchable memory is supported 9421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * by this bridge. 9431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 9441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_read_config_word(bridge, PCI_CB_BRIDGE_CONTROL, &ctrl); 9451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!(ctrl & PCI_CB_BRIDGE_CTL_PREFETCH_MEM0)) { 9461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ctrl |= PCI_CB_BRIDGE_CTL_PREFETCH_MEM0; 9471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_write_config_word(bridge, PCI_CB_BRIDGE_CONTROL, ctrl); 9481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_read_config_word(bridge, PCI_CB_BRIDGE_CONTROL, &ctrl); 9491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 9501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9513796f1e2ca38deebd30aa755ea52562b6926c73eYinghai Lu if (b_res[2].parent) 9523796f1e2ca38deebd30aa755ea52562b6926c73eYinghai Lu goto handle_b_res_3; 9531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* 9541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * If we have prefetchable memory support, allocate 9551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * two regions. Otherwise, allocate one region of 9561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * twice the size. 9571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 9581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (ctrl & PCI_CB_BRIDGE_CTL_PREFETCH_MEM0) { 9591184893439b1a7532b579a85a354db12bbf1b277Yinghai Lu b_res[2].start = pci_cardbus_mem_size; 9601184893439b1a7532b579a85a354db12bbf1b277Yinghai Lu b_res[2].end = b_res[2].start + pci_cardbus_mem_size - 1; 9611184893439b1a7532b579a85a354db12bbf1b277Yinghai Lu b_res[2].flags |= IORESOURCE_MEM | IORESOURCE_PREFETCH | 9621184893439b1a7532b579a85a354db12bbf1b277Yinghai Lu IORESOURCE_STARTALIGN; 9631184893439b1a7532b579a85a354db12bbf1b277Yinghai Lu if (realloc_head) { 9641184893439b1a7532b579a85a354db12bbf1b277Yinghai Lu b_res[2].end -= pci_cardbus_mem_size; 9651184893439b1a7532b579a85a354db12bbf1b277Yinghai Lu add_to_list(realloc_head, bridge, b_res+2, 9661184893439b1a7532b579a85a354db12bbf1b277Yinghai Lu pci_cardbus_mem_size, pci_cardbus_mem_size); 9671184893439b1a7532b579a85a354db12bbf1b277Yinghai Lu } 9681184893439b1a7532b579a85a354db12bbf1b277Yinghai Lu 9691184893439b1a7532b579a85a354db12bbf1b277Yinghai Lu /* reduce that to half */ 9701184893439b1a7532b579a85a354db12bbf1b277Yinghai Lu b_res_3_size = pci_cardbus_mem_size; 9711184893439b1a7532b579a85a354db12bbf1b277Yinghai Lu } 9721184893439b1a7532b579a85a354db12bbf1b277Yinghai Lu 9733796f1e2ca38deebd30aa755ea52562b6926c73eYinghai Luhandle_b_res_3: 9743796f1e2ca38deebd30aa755ea52562b6926c73eYinghai Lu if (b_res[3].parent) 9753796f1e2ca38deebd30aa755ea52562b6926c73eYinghai Lu goto handle_done; 9761184893439b1a7532b579a85a354db12bbf1b277Yinghai Lu b_res[3].start = pci_cardbus_mem_size; 9771184893439b1a7532b579a85a354db12bbf1b277Yinghai Lu b_res[3].end = b_res[3].start + b_res_3_size - 1; 9781184893439b1a7532b579a85a354db12bbf1b277Yinghai Lu b_res[3].flags |= IORESOURCE_MEM | IORESOURCE_STARTALIGN; 9791184893439b1a7532b579a85a354db12bbf1b277Yinghai Lu if (realloc_head) { 9801184893439b1a7532b579a85a354db12bbf1b277Yinghai Lu b_res[3].end -= b_res_3_size; 9811184893439b1a7532b579a85a354db12bbf1b277Yinghai Lu add_to_list(realloc_head, bridge, b_res+3, b_res_3_size, 9821184893439b1a7532b579a85a354db12bbf1b277Yinghai Lu pci_cardbus_mem_size); 9831184893439b1a7532b579a85a354db12bbf1b277Yinghai Lu } 9843796f1e2ca38deebd30aa755ea52562b6926c73eYinghai Lu 9853796f1e2ca38deebd30aa755ea52562b6926c73eYinghai Luhandle_done: 9863796f1e2ca38deebd30aa755ea52562b6926c73eYinghai Lu ; 9871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 9881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 989c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Paivoid __ref __pci_bus_size_bridges(struct pci_bus *bus, 990bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu struct list_head *realloc_head) 9911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 9921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct pci_dev *dev; 9931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long mask, prefmask; 994c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai resource_size_t additional_mem_size = 0, additional_io_size = 0; 9951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds list_for_each_entry(dev, &bus->devices, bus_list) { 9971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct pci_bus *b = dev->subordinate; 9981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!b) 9991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds continue; 10001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds switch (dev->class >> 8) { 10021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case PCI_CLASS_BRIDGE_CARDBUS: 10039e8bf93a7f416a3fa8fb6d76177d90e67bd45496Ram Pai pci_bus_size_cardbus(b, realloc_head); 10041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 10051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case PCI_CLASS_BRIDGE_PCI: 10071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds default: 10089e8bf93a7f416a3fa8fb6d76177d90e67bd45496Ram Pai __pci_bus_size_bridges(b, realloc_head); 10091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 10101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 10111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 10121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* The root bus? */ 10141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!bus->self) 10151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return; 10161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds switch (bus->self->class >> 8) { 10181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case PCI_CLASS_BRIDGE_CARDBUS: 10191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* don't size cardbuses yet. */ 10201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 10211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case PCI_CLASS_BRIDGE_PCI: 10231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_bridge_check_ranges(bus); 102428760489a3f1e136c5ae8581c0fa8f63511f2f4cEric W. Biederman if (bus->self->is_hotplug_bridge) { 1025c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai additional_io_size = pci_hotplug_io_size; 1026c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai additional_mem_size = pci_hotplug_mem_size; 102728760489a3f1e136c5ae8581c0fa8f63511f2f4cEric W. Biederman } 1028c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai /* 1029c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * Follow thru 1030c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai */ 10311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds default: 103219aa7ee432cec00b647443719eb5c055b69a5e8eYinghai Lu pbus_size_io(bus, realloc_head ? 0 : additional_io_size, 103319aa7ee432cec00b647443719eb5c055b69a5e8eYinghai Lu additional_io_size, realloc_head); 10341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* If the bridge supports prefetchable range, size it 10351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds separately. If it doesn't, or its prefetchable window 10361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds has already been allocated by arch code, try 10371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds non-prefetchable range for both types of PCI memory 10381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds resources. */ 10391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mask = IORESOURCE_MEM; 10401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds prefmask = IORESOURCE_MEM | IORESOURCE_PREFETCH; 104119aa7ee432cec00b647443719eb5c055b69a5e8eYinghai Lu if (pbus_size_mem(bus, prefmask, prefmask, 104219aa7ee432cec00b647443719eb5c055b69a5e8eYinghai Lu realloc_head ? 0 : additional_mem_size, 104319aa7ee432cec00b647443719eb5c055b69a5e8eYinghai Lu additional_mem_size, realloc_head)) 10441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mask = prefmask; /* Success, size non-prefetch only. */ 104528760489a3f1e136c5ae8581c0fa8f63511f2f4cEric W. Biederman else 1046c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai additional_mem_size += additional_mem_size; 104719aa7ee432cec00b647443719eb5c055b69a5e8eYinghai Lu pbus_size_mem(bus, mask, IORESOURCE_MEM, 104819aa7ee432cec00b647443719eb5c055b69a5e8eYinghai Lu realloc_head ? 0 : additional_mem_size, 104919aa7ee432cec00b647443719eb5c055b69a5e8eYinghai Lu additional_mem_size, realloc_head); 10501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 10511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 10521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 1053c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai 1054c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Paivoid __ref pci_bus_size_bridges(struct pci_bus *bus) 1055c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai{ 1056c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai __pci_bus_size_bridges(bus, NULL); 1057c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai} 10581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL(pci_bus_size_bridges); 10591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1060568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lustatic void __ref __pci_bus_assign_resources(const struct pci_bus *bus, 1061bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu struct list_head *realloc_head, 1062bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu struct list_head *fail_head) 10631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 10641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct pci_bus *b; 10651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct pci_dev *dev; 10661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10679e8bf93a7f416a3fa8fb6d76177d90e67bd45496Ram Pai pbus_assign_resources_sorted(bus, realloc_head, fail_head); 10681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds list_for_each_entry(dev, &bus->devices, bus_list) { 10701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds b = dev->subordinate; 10711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!b) 10721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds continue; 10731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10749e8bf93a7f416a3fa8fb6d76177d90e67bd45496Ram Pai __pci_bus_assign_resources(b, realloc_head, fail_head); 10751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds switch (dev->class >> 8) { 10771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case PCI_CLASS_BRIDGE_PCI: 10786841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu if (!pci_is_enabled(dev)) 10796841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu pci_setup_bridge(b); 10801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 10811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case PCI_CLASS_BRIDGE_CARDBUS: 10831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_setup_cardbus(b); 10841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 10851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds default: 108780ccba1186d48fa728dc4b1456cc07ffb07da501Bjorn Helgaas dev_info(&dev->dev, "not setting up bridge for bus " 108880ccba1186d48fa728dc4b1456cc07ffb07da501Bjorn Helgaas "%04x:%02x\n", pci_domain_nr(b), b->number); 10891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 10901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 10911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 10921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 1093568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu 1094568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Luvoid __ref pci_bus_assign_resources(const struct pci_bus *bus) 1095568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu{ 1096c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai __pci_bus_assign_resources(bus, NULL, NULL); 1097568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu} 10981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL(pci_bus_assign_resources); 10991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11006841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lustatic void __ref __pci_bridge_assign_resources(const struct pci_dev *bridge, 1101bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu struct list_head *add_head, 1102bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu struct list_head *fail_head) 11036841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu{ 11046841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu struct pci_bus *b; 11056841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu 11068424d7592eab8245b51051ee458e598213bca3b2Yinghai Lu pdev_assign_resources_sorted((struct pci_dev *)bridge, 11078424d7592eab8245b51051ee458e598213bca3b2Yinghai Lu add_head, fail_head); 11086841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu 11096841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu b = bridge->subordinate; 11106841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu if (!b) 11116841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu return; 11126841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu 11138424d7592eab8245b51051ee458e598213bca3b2Yinghai Lu __pci_bus_assign_resources(b, add_head, fail_head); 11146841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu 11156841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu switch (bridge->class >> 8) { 11166841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu case PCI_CLASS_BRIDGE_PCI: 11176841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu pci_setup_bridge(b); 11186841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu break; 11196841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu 11206841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu case PCI_CLASS_BRIDGE_CARDBUS: 11216841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu pci_setup_cardbus(b); 11226841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu break; 11236841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu 11246841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu default: 11256841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu dev_info(&bridge->dev, "not setting up bridge for bus " 11266841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu "%04x:%02x\n", pci_domain_nr(b), b->number); 11276841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu break; 11286841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu } 11296841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu} 11305009b46025acb2d3955d2c93574604fba667ef39Yinghai Lustatic void pci_bridge_release_resources(struct pci_bus *bus, 11315009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu unsigned long type) 11325009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu{ 11335009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu int idx; 11345009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu bool changed = false; 11355009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu struct pci_dev *dev; 11365009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu struct resource *r; 11375009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu unsigned long type_mask = IORESOURCE_IO | IORESOURCE_MEM | 11385009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu IORESOURCE_PREFETCH; 11395009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu 11405009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu dev = bus->self; 11415009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu for (idx = PCI_BRIDGE_RESOURCES; idx <= PCI_BRIDGE_RESOURCE_END; 11425009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu idx++) { 11435009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu r = &dev->resource[idx]; 11445009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu if ((r->flags & type_mask) != type) 11455009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu continue; 11465009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu if (!r->parent) 11475009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu continue; 11485009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu /* 11495009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu * if there are children under that, we should release them 11505009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu * all 11515009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu */ 11525009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu release_child_resources(r); 11535009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu if (!release_resource(r)) { 11545009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu dev_printk(KERN_DEBUG, &dev->dev, 11555009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu "resource %d %pR released\n", idx, r); 11565009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu /* keep the old size */ 11575009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu r->end = resource_size(r) - 1; 11585009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu r->start = 0; 11595009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu r->flags = 0; 11605009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu changed = true; 11615009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu } 11625009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu } 11635009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu 11645009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu if (changed) { 11655009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu /* avoiding touch the one without PREF */ 11665009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu if (type & IORESOURCE_PREFETCH) 11675009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu type = IORESOURCE_PREFETCH; 11685009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu __pci_setup_bridge(bus, type); 11695009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu } 11705009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu} 11715009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu 11725009b46025acb2d3955d2c93574604fba667ef39Yinghai Luenum release_type { 11735009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu leaf_only, 11745009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu whole_subtree, 11755009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu}; 11765009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu/* 11775009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu * try to release pci bridge resources that is from leaf bridge, 11785009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu * so we can allocate big new one later 11795009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu */ 11805009b46025acb2d3955d2c93574604fba667ef39Yinghai Lustatic void __ref pci_bus_release_bridge_resources(struct pci_bus *bus, 11815009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu unsigned long type, 11825009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu enum release_type rel_type) 11835009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu{ 11845009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu struct pci_dev *dev; 11855009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu bool is_leaf_bridge = true; 11865009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu 11875009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu list_for_each_entry(dev, &bus->devices, bus_list) { 11885009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu struct pci_bus *b = dev->subordinate; 11895009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu if (!b) 11905009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu continue; 11915009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu 11925009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu is_leaf_bridge = false; 11935009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu 11945009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu if ((dev->class >> 8) != PCI_CLASS_BRIDGE_PCI) 11955009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu continue; 11965009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu 11975009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu if (rel_type == whole_subtree) 11985009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu pci_bus_release_bridge_resources(b, type, 11995009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu whole_subtree); 12005009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu } 12015009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu 12025009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu if (pci_is_root_bus(bus)) 12035009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu return; 12045009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu 12055009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu if ((bus->self->class >> 8) != PCI_CLASS_BRIDGE_PCI) 12065009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu return; 12075009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu 12085009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu if ((rel_type == whole_subtree) || is_leaf_bridge) 12095009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu pci_bridge_release_resources(bus, type); 12105009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu} 12115009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu 121276fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lustatic void pci_bus_dump_res(struct pci_bus *bus) 121376fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lu{ 121489a74ecccd1f78e51faf6287e5c0e93a92ac096eBjorn Helgaas struct resource *res; 121589a74ecccd1f78e51faf6287e5c0e93a92ac096eBjorn Helgaas int i; 12167c9342b8dd1a32386fc32bffb9eedebbfe264763Yinghai Lu 121789a74ecccd1f78e51faf6287e5c0e93a92ac096eBjorn Helgaas pci_bus_for_each_resource(bus, res, i) { 12187c9342b8dd1a32386fc32bffb9eedebbfe264763Yinghai Lu if (!res || !res->end || !res->flags) 121976fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lu continue; 122076fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lu 1221c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas dev_printk(KERN_DEBUG, &bus->dev, "resource %d %pR\n", i, res); 122276fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lu } 122376fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lu} 122476fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lu 122576fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lustatic void pci_bus_dump_resources(struct pci_bus *bus) 122676fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lu{ 122776fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lu struct pci_bus *b; 122876fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lu struct pci_dev *dev; 122976fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lu 123076fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lu 123176fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lu pci_bus_dump_res(bus); 123276fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lu 123376fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lu list_for_each_entry(dev, &bus->devices, bus_list) { 123476fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lu b = dev->subordinate; 123576fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lu if (!b) 123676fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lu continue; 123776fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lu 123876fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lu pci_bus_dump_resources(b); 123976fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lu } 124076fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lu} 124176fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lu 1242da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lustatic int __init pci_bus_get_depth(struct pci_bus *bus) 1243da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu{ 1244da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu int depth = 0; 1245da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu struct pci_dev *dev; 1246da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu 1247da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu list_for_each_entry(dev, &bus->devices, bus_list) { 1248da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu int ret; 1249da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu struct pci_bus *b = dev->subordinate; 1250da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu if (!b) 1251da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu continue; 1252da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu 1253da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu ret = pci_bus_get_depth(b); 1254da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu if (ret + 1 > depth) 1255da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu depth = ret + 1; 1256da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu } 1257da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu 1258da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu return depth; 1259da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu} 1260da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lustatic int __init pci_get_max_depth(void) 1261da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu{ 1262da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu int depth = 0; 1263da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu struct pci_bus *bus; 1264da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu 1265da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu list_for_each_entry(bus, &pci_root_buses, node) { 1266da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu int ret; 1267da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu 1268da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu ret = pci_bus_get_depth(bus); 1269da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu if (ret > depth) 1270da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu depth = ret; 1271da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu } 1272da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu 1273da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu return depth; 1274da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu} 1275da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu 1276f483d3923dc3a6394c483e28ccb3fe700bdf399eRam Pai 1277da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu/* 1278da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu * first try will not touch pci bridge res 1279da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu * second and later try will clear small leaf bridge res 1280da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu * will stop till to the max deepth if can not find good one 1281da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu */ 12821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid __init 12831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldspci_assign_unassigned_resources(void) 12841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 12851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct pci_bus *bus; 1286bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu LIST_HEAD(realloc_head); /* list of resources that 1287c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai want additional resources */ 1288bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu struct list_head *add_list = NULL; 1289da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu int tried_times = 0; 1290da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu enum release_type rel_type = leaf_only; 1291bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu LIST_HEAD(fail_head); 1292b9b0bba96cf5acbf025f7829fbf6c09e74323b41Yinghai Lu struct pci_dev_resource *fail_res; 1293da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu unsigned long type_mask = IORESOURCE_IO | IORESOURCE_MEM | 1294da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu IORESOURCE_PREFETCH; 129519aa7ee432cec00b647443719eb5c055b69a5e8eYinghai Lu int pci_try_num = 1; 1296da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu 129719aa7ee432cec00b647443719eb5c055b69a5e8eYinghai Lu /* don't realloc if asked to do so */ 129819aa7ee432cec00b647443719eb5c055b69a5e8eYinghai Lu if (pci_realloc_enabled()) { 129919aa7ee432cec00b647443719eb5c055b69a5e8eYinghai Lu int max_depth = pci_get_max_depth(); 130019aa7ee432cec00b647443719eb5c055b69a5e8eYinghai Lu 130119aa7ee432cec00b647443719eb5c055b69a5e8eYinghai Lu pci_try_num = max_depth + 1; 130219aa7ee432cec00b647443719eb5c055b69a5e8eYinghai Lu printk(KERN_DEBUG "PCI: max bus depth: %d pci_try_num: %d\n", 130319aa7ee432cec00b647443719eb5c055b69a5e8eYinghai Lu max_depth, pci_try_num); 130419aa7ee432cec00b647443719eb5c055b69a5e8eYinghai Lu } 1305da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu 1306da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Luagain: 130719aa7ee432cec00b647443719eb5c055b69a5e8eYinghai Lu /* 130819aa7ee432cec00b647443719eb5c055b69a5e8eYinghai Lu * last try will use add_list, otherwise will try good to have as 130919aa7ee432cec00b647443719eb5c055b69a5e8eYinghai Lu * must have, so can realloc parent bridge resource 131019aa7ee432cec00b647443719eb5c055b69a5e8eYinghai Lu */ 131119aa7ee432cec00b647443719eb5c055b69a5e8eYinghai Lu if (tried_times + 1 == pci_try_num) 1312bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu add_list = &realloc_head; 13131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Depth first, calculate sizes and alignments of all 13141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds subordinate buses. */ 1315da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu list_for_each_entry(bus, &pci_root_buses, node) 131619aa7ee432cec00b647443719eb5c055b69a5e8eYinghai Lu __pci_bus_size_bridges(bus, add_list); 1317c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai 13181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Depth last, allocate resources and update the hardware. */ 1319da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu list_for_each_entry(bus, &pci_root_buses, node) 1320bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu __pci_bus_assign_resources(bus, add_list, &fail_head); 132119aa7ee432cec00b647443719eb5c055b69a5e8eYinghai Lu if (add_list) 1322bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu BUG_ON(!list_empty(add_list)); 1323da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu tried_times++; 1324da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu 1325da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu /* any device complain? */ 1326bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu if (list_empty(&fail_head)) 1327da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu goto enable_and_dump; 1328f483d3923dc3a6394c483e28ccb3fe700bdf399eRam Pai 13290c5be0cb0edfe3b5c4b62eac68aa2aa15ec681afYinghai Lu if (tried_times >= pci_try_num) { 1330bffc56d41102705d809f88c29918a9c33d2900f7Yinghai Lu free_list(&fail_head); 1331da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu goto enable_and_dump; 1332da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu } 1333da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu 1334da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu printk(KERN_DEBUG "PCI: No. %d try to assign unassigned res\n", 1335da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu tried_times + 1); 1336da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu 1337da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu /* third times and later will not check if it is leaf */ 1338da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu if ((tried_times + 1) > 2) 1339da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu rel_type = whole_subtree; 1340da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu 1341da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu /* 1342da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu * Try to release leaf bridge's resources that doesn't fit resource of 1343da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu * child device under that bridge 1344da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu */ 1345b9b0bba96cf5acbf025f7829fbf6c09e74323b41Yinghai Lu list_for_each_entry(fail_res, &fail_head, list) { 1346b9b0bba96cf5acbf025f7829fbf6c09e74323b41Yinghai Lu bus = fail_res->dev->bus; 1347bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu pci_bus_release_bridge_resources(bus, 1348b9b0bba96cf5acbf025f7829fbf6c09e74323b41Yinghai Lu fail_res->flags & type_mask, 1349bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu rel_type); 1350da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu } 1351da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu /* restore size and flags */ 1352b9b0bba96cf5acbf025f7829fbf6c09e74323b41Yinghai Lu list_for_each_entry(fail_res, &fail_head, list) { 1353b9b0bba96cf5acbf025f7829fbf6c09e74323b41Yinghai Lu struct resource *res = fail_res->res; 1354da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu 1355b9b0bba96cf5acbf025f7829fbf6c09e74323b41Yinghai Lu res->start = fail_res->start; 1356b9b0bba96cf5acbf025f7829fbf6c09e74323b41Yinghai Lu res->end = fail_res->end; 1357b9b0bba96cf5acbf025f7829fbf6c09e74323b41Yinghai Lu res->flags = fail_res->flags; 1358b9b0bba96cf5acbf025f7829fbf6c09e74323b41Yinghai Lu if (fail_res->dev->subordinate) 1359da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu res->flags = 0; 1360da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu } 1361bffc56d41102705d809f88c29918a9c33d2900f7Yinghai Lu free_list(&fail_head); 1362da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu 1363da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu goto again; 1364da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu 1365da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Luenable_and_dump: 1366da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu /* Depth last, update the hardware. */ 1367da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu list_for_each_entry(bus, &pci_root_buses, node) 1368da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu pci_enable_bridges(bus); 136976fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lu 137076fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lu /* dump the resource on buses */ 1371da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu list_for_each_entry(bus, &pci_root_buses, node) 137276fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lu pci_bus_dump_resources(bus); 13731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 13746841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu 13756841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Luvoid pci_assign_unassigned_bridge_resources(struct pci_dev *bridge) 13766841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu{ 13776841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu struct pci_bus *parent = bridge->subordinate; 1378bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu LIST_HEAD(add_list); /* list of resources that 13798424d7592eab8245b51051ee458e598213bca3b2Yinghai Lu want additional resources */ 138032180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu int tried_times = 0; 1381bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu LIST_HEAD(fail_head); 1382b9b0bba96cf5acbf025f7829fbf6c09e74323b41Yinghai Lu struct pci_dev_resource *fail_res; 13836841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu int retval; 138432180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu unsigned long type_mask = IORESOURCE_IO | IORESOURCE_MEM | 138532180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu IORESOURCE_PREFETCH; 138632180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu 138732180e402f9ff1f3389c99edf3f393425e706080Yinghai Luagain: 13888424d7592eab8245b51051ee458e598213bca3b2Yinghai Lu __pci_bus_size_bridges(parent, &add_list); 1389bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu __pci_bridge_assign_resources(bridge, &add_list, &fail_head); 1390bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu BUG_ON(!list_empty(&add_list)); 139132180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu tried_times++; 139232180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu 1393bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu if (list_empty(&fail_head)) 13943f579c340fe6d6bdd8c6f9f144e7c3b85d4174ecYinghai Lu goto enable_all; 139532180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu 139632180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu if (tried_times >= 2) { 139732180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu /* still fail, don't need to try more */ 1398bffc56d41102705d809f88c29918a9c33d2900f7Yinghai Lu free_list(&fail_head); 13993f579c340fe6d6bdd8c6f9f144e7c3b85d4174ecYinghai Lu goto enable_all; 140032180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu } 140132180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu 140232180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu printk(KERN_DEBUG "PCI: No. %d try to assign unassigned res\n", 140332180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu tried_times + 1); 140432180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu 140532180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu /* 140632180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu * Try to release leaf bridge's resources that doesn't fit resource of 140732180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu * child device under that bridge 140832180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu */ 1409b9b0bba96cf5acbf025f7829fbf6c09e74323b41Yinghai Lu list_for_each_entry(fail_res, &fail_head, list) { 1410b9b0bba96cf5acbf025f7829fbf6c09e74323b41Yinghai Lu struct pci_bus *bus = fail_res->dev->bus; 1411b9b0bba96cf5acbf025f7829fbf6c09e74323b41Yinghai Lu unsigned long flags = fail_res->flags; 141232180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu 141332180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu pci_bus_release_bridge_resources(bus, flags & type_mask, 141432180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu whole_subtree); 141532180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu } 141632180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu /* restore size and flags */ 1417b9b0bba96cf5acbf025f7829fbf6c09e74323b41Yinghai Lu list_for_each_entry(fail_res, &fail_head, list) { 1418b9b0bba96cf5acbf025f7829fbf6c09e74323b41Yinghai Lu struct resource *res = fail_res->res; 141932180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu 1420b9b0bba96cf5acbf025f7829fbf6c09e74323b41Yinghai Lu res->start = fail_res->start; 1421b9b0bba96cf5acbf025f7829fbf6c09e74323b41Yinghai Lu res->end = fail_res->end; 1422b9b0bba96cf5acbf025f7829fbf6c09e74323b41Yinghai Lu res->flags = fail_res->flags; 1423b9b0bba96cf5acbf025f7829fbf6c09e74323b41Yinghai Lu if (fail_res->dev->subordinate) 142432180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu res->flags = 0; 142532180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu } 1426bffc56d41102705d809f88c29918a9c33d2900f7Yinghai Lu free_list(&fail_head); 142732180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu 142832180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu goto again; 14293f579c340fe6d6bdd8c6f9f144e7c3b85d4174ecYinghai Lu 14303f579c340fe6d6bdd8c6f9f144e7c3b85d4174ecYinghai Luenable_all: 14313f579c340fe6d6bdd8c6f9f144e7c3b85d4174ecYinghai Lu retval = pci_reenable_device(bridge); 14323f579c340fe6d6bdd8c6f9f144e7c3b85d4174ecYinghai Lu pci_set_master(bridge); 14333f579c340fe6d6bdd8c6f9f144e7c3b85d4174ecYinghai Lu pci_enable_bridges(parent); 14346841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu} 14356841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai LuEXPORT_SYMBOL_GPL(pci_assign_unassigned_bridge_resources); 14369b03088f955552299f50a1f660372698b07ab339Yinghai Lu 14379b03088f955552299f50a1f660372698b07ab339Yinghai Lu#ifdef CONFIG_HOTPLUG 14389b03088f955552299f50a1f660372698b07ab339Yinghai Lu/** 14399b03088f955552299f50a1f660372698b07ab339Yinghai Lu * pci_rescan_bus - scan a PCI bus for devices. 14409b03088f955552299f50a1f660372698b07ab339Yinghai Lu * @bus: PCI bus to scan 14419b03088f955552299f50a1f660372698b07ab339Yinghai Lu * 14429b03088f955552299f50a1f660372698b07ab339Yinghai Lu * Scan a PCI bus and child buses for new devices, adds them, 14439b03088f955552299f50a1f660372698b07ab339Yinghai Lu * and enables them. 14449b03088f955552299f50a1f660372698b07ab339Yinghai Lu * 14459b03088f955552299f50a1f660372698b07ab339Yinghai Lu * Returns the max number of subordinate bus discovered. 14469b03088f955552299f50a1f660372698b07ab339Yinghai Lu */ 14479b03088f955552299f50a1f660372698b07ab339Yinghai Luunsigned int __ref pci_rescan_bus(struct pci_bus *bus) 14489b03088f955552299f50a1f660372698b07ab339Yinghai Lu{ 14499b03088f955552299f50a1f660372698b07ab339Yinghai Lu unsigned int max; 14509b03088f955552299f50a1f660372698b07ab339Yinghai Lu struct pci_dev *dev; 1451bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu LIST_HEAD(add_list); /* list of resources that 14529b03088f955552299f50a1f660372698b07ab339Yinghai Lu want additional resources */ 14539b03088f955552299f50a1f660372698b07ab339Yinghai Lu 14549b03088f955552299f50a1f660372698b07ab339Yinghai Lu max = pci_scan_child_bus(bus); 14559b03088f955552299f50a1f660372698b07ab339Yinghai Lu 14569b03088f955552299f50a1f660372698b07ab339Yinghai Lu down_read(&pci_bus_sem); 14579b03088f955552299f50a1f660372698b07ab339Yinghai Lu list_for_each_entry(dev, &bus->devices, bus_list) 14589b03088f955552299f50a1f660372698b07ab339Yinghai Lu if (dev->hdr_type == PCI_HEADER_TYPE_BRIDGE || 14599b03088f955552299f50a1f660372698b07ab339Yinghai Lu dev->hdr_type == PCI_HEADER_TYPE_CARDBUS) 14609b03088f955552299f50a1f660372698b07ab339Yinghai Lu if (dev->subordinate) 14619b03088f955552299f50a1f660372698b07ab339Yinghai Lu __pci_bus_size_bridges(dev->subordinate, 14629b03088f955552299f50a1f660372698b07ab339Yinghai Lu &add_list); 14639b03088f955552299f50a1f660372698b07ab339Yinghai Lu up_read(&pci_bus_sem); 14649b03088f955552299f50a1f660372698b07ab339Yinghai Lu __pci_bus_assign_resources(bus, &add_list, NULL); 1465bdc4abecaeff30b3cc230b418a925999dda594c2Yinghai Lu BUG_ON(!list_empty(&add_list)); 14669b03088f955552299f50a1f660372698b07ab339Yinghai Lu 14679b03088f955552299f50a1f660372698b07ab339Yinghai Lu pci_enable_bridges(bus); 14689b03088f955552299f50a1f660372698b07ab339Yinghai Lu pci_bus_add_devices(bus); 14699b03088f955552299f50a1f660372698b07ab339Yinghai Lu 14709b03088f955552299f50a1f660372698b07ab339Yinghai Lu return max; 14719b03088f955552299f50a1f660372698b07ab339Yinghai Lu} 14729b03088f955552299f50a1f660372698b07ab339Yinghai LuEXPORT_SYMBOL_GPL(pci_rescan_bus); 14739b03088f955552299f50a1f660372698b07ab339Yinghai Lu#endif 1474