setup-bus.c revision 2934a0de095f277a7bbc15a72ecf61af31a45163
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 302934a0de095f277a7bbc15a72ecf61af31a45163Yinghai Lustruct resource_list { 312934a0de095f277a7bbc15a72ecf61af31a45163Yinghai Lu struct resource_list *next; 322934a0de095f277a7bbc15a72ecf61af31a45163Yinghai Lu struct resource *res; 332934a0de095f277a7bbc15a72ecf61af31a45163Yinghai Lu struct pci_dev *dev; 342934a0de095f277a7bbc15a72ecf61af31a45163Yinghai Lu}; 352934a0de095f277a7bbc15a72ecf61af31a45163Yinghai Lu 36568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lustruct resource_list_x { 37568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu struct resource_list_x *next; 38568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu struct resource *res; 39568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu struct pci_dev *dev; 40568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu resource_size_t start; 41568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu resource_size_t end; 42c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai resource_size_t add_size; 432bbc6942273b5b3097bd265d82227bdd84b351b2Ram Pai resource_size_t min_align; 44568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu unsigned long flags; 45568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu}; 46568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu 47094732a520caae81ae1532af29da82a4fa953472Ram Pai#define free_list(type, head) do { \ 48094732a520caae81ae1532af29da82a4fa953472Ram Pai struct type *list, *tmp; \ 49094732a520caae81ae1532af29da82a4fa953472Ram Pai for (list = (head)->next; list;) { \ 50094732a520caae81ae1532af29da82a4fa953472Ram Pai tmp = list; \ 51094732a520caae81ae1532af29da82a4fa953472Ram Pai list = list->next; \ 52094732a520caae81ae1532af29da82a4fa953472Ram Pai kfree(tmp); \ 53094732a520caae81ae1532af29da82a4fa953472Ram Pai } \ 54094732a520caae81ae1532af29da82a4fa953472Ram Pai (head)->next = NULL; \ 55094732a520caae81ae1532af29da82a4fa953472Ram Pai} while (0) 56094732a520caae81ae1532af29da82a4fa953472Ram Pai 57f483d3923dc3a6394c483e28ccb3fe700bdf399eRam Paiint pci_realloc_enable = 0; 58f483d3923dc3a6394c483e28ccb3fe700bdf399eRam Pai#define pci_realloc_enabled() pci_realloc_enable 59f483d3923dc3a6394c483e28ccb3fe700bdf399eRam Paivoid pci_realloc(void) 60f483d3923dc3a6394c483e28ccb3fe700bdf399eRam Pai{ 61f483d3923dc3a6394c483e28ccb3fe700bdf399eRam Pai pci_realloc_enable = 1; 62f483d3923dc3a6394c483e28ccb3fe700bdf399eRam Pai} 63f483d3923dc3a6394c483e28ccb3fe700bdf399eRam Pai 64c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai/** 65c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * add_to_list() - add a new resource tracker to the list 66c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * @head: Head of the list 67c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * @dev: device corresponding to which the resource 68c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * belongs 69c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * @res: The resource to be tracked 70c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * @add_size: additional size to be optionally added 71c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * to the resource 72c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai */ 73ef62dfefa93bc90f1cb0f4a55c2d86b3269b3f92Yinghai Lustatic int add_to_list(struct resource_list_x *head, 74c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai struct pci_dev *dev, struct resource *res, 752bbc6942273b5b3097bd265d82227bdd84b351b2Ram Pai resource_size_t add_size, resource_size_t min_align) 76568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu{ 77568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu struct resource_list_x *list = head; 78568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu struct resource_list_x *ln = list->next; 79568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu struct resource_list_x *tmp; 80568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu 81568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu tmp = kmalloc(sizeof(*tmp), GFP_KERNEL); 82568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu if (!tmp) { 83c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai pr_warning("add_to_list: kmalloc() failed!\n"); 84ef62dfefa93bc90f1cb0f4a55c2d86b3269b3f92Yinghai Lu return -ENOMEM; 85568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu } 86568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu 87568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu tmp->next = ln; 88568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu tmp->res = res; 89568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu tmp->dev = dev; 90568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu tmp->start = res->start; 91568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu tmp->end = res->end; 92568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu tmp->flags = res->flags; 93c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai tmp->add_size = add_size; 942bbc6942273b5b3097bd265d82227bdd84b351b2Ram Pai tmp->min_align = min_align; 95568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu list->next = tmp; 96ef62dfefa93bc90f1cb0f4a55c2d86b3269b3f92Yinghai Lu 97ef62dfefa93bc90f1cb0f4a55c2d86b3269b3f92Yinghai Lu return 0; 98568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu} 99568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu 100c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Paistatic void add_to_failed_list(struct resource_list_x *head, 101c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai struct pci_dev *dev, struct resource *res) 102c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai{ 1032bbc6942273b5b3097bd265d82227bdd84b351b2Ram Pai add_to_list(head, dev, res, 1042bbc6942273b5b3097bd265d82227bdd84b351b2Ram Pai 0 /* dont care */, 1052bbc6942273b5b3097bd265d82227bdd84b351b2Ram Pai 0 /* dont care */); 106c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai} 107c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai 1083e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lustatic void remove_from_list(struct resource_list_x *realloc_head, 1093e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu struct resource *res) 1103e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu{ 1113e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu struct resource_list_x *prev, *tmp, *list; 1123e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu 1133e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu prev = realloc_head; 1143e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu for (list = realloc_head->next; list;) { 1153e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu if (list->res != res) { 1163e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu prev = list; 1173e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu list = list->next; 1183e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu continue; 1193e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu } 1203e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu tmp = list; 1213e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu prev->next = list = list->next; 1223e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu kfree(tmp); 1233e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu } 1243e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu} 1253e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu 1261c372353e9c681b127f21030f8a0f0c2afd82429Yinghai Lustatic resource_size_t get_res_add_size(struct resource_list_x *realloc_head, 1271c372353e9c681b127f21030f8a0f0c2afd82429Yinghai Lu struct resource *res) 1281c372353e9c681b127f21030f8a0f0c2afd82429Yinghai Lu{ 1291c372353e9c681b127f21030f8a0f0c2afd82429Yinghai Lu struct resource_list_x *list; 1301c372353e9c681b127f21030f8a0f0c2afd82429Yinghai Lu 1311c372353e9c681b127f21030f8a0f0c2afd82429Yinghai Lu /* check if it is in realloc_head list */ 1321c372353e9c681b127f21030f8a0f0c2afd82429Yinghai Lu for (list = realloc_head->next; list && list->res != res; 1331c372353e9c681b127f21030f8a0f0c2afd82429Yinghai Lu list = list->next) 1341c372353e9c681b127f21030f8a0f0c2afd82429Yinghai Lu ; 1353e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu 1363e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu if (list) { 1373e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu dev_printk(KERN_DEBUG, &list->dev->dev, 1383e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu "%pR get_res_add_size add_size %llx\n", 1393e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu list->res, (unsigned long long)list->add_size); 1401c372353e9c681b127f21030f8a0f0c2afd82429Yinghai Lu return list->add_size; 1413e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu } 1421c372353e9c681b127f21030f8a0f0c2afd82429Yinghai Lu 1431c372353e9c681b127f21030f8a0f0c2afd82429Yinghai Lu return 0; 1441c372353e9c681b127f21030f8a0f0c2afd82429Yinghai Lu} 1451c372353e9c681b127f21030f8a0f0c2afd82429Yinghai Lu 14678c3b329b9dd7097781cb900146e503e499cccfeYinghai Lu/* Sort resources by alignment */ 14778c3b329b9dd7097781cb900146e503e499cccfeYinghai Lustatic void pdev_sort_resources(struct pci_dev *dev, struct resource_list *head) 14878c3b329b9dd7097781cb900146e503e499cccfeYinghai Lu{ 14978c3b329b9dd7097781cb900146e503e499cccfeYinghai Lu int i; 15078c3b329b9dd7097781cb900146e503e499cccfeYinghai Lu 15178c3b329b9dd7097781cb900146e503e499cccfeYinghai Lu for (i = 0; i < PCI_NUM_RESOURCES; i++) { 15278c3b329b9dd7097781cb900146e503e499cccfeYinghai Lu struct resource *r; 15378c3b329b9dd7097781cb900146e503e499cccfeYinghai Lu struct resource_list *list, *tmp; 15478c3b329b9dd7097781cb900146e503e499cccfeYinghai Lu resource_size_t r_align; 15578c3b329b9dd7097781cb900146e503e499cccfeYinghai Lu 15678c3b329b9dd7097781cb900146e503e499cccfeYinghai Lu r = &dev->resource[i]; 15778c3b329b9dd7097781cb900146e503e499cccfeYinghai Lu 15878c3b329b9dd7097781cb900146e503e499cccfeYinghai Lu if (r->flags & IORESOURCE_PCI_FIXED) 15978c3b329b9dd7097781cb900146e503e499cccfeYinghai Lu continue; 16078c3b329b9dd7097781cb900146e503e499cccfeYinghai Lu 16178c3b329b9dd7097781cb900146e503e499cccfeYinghai Lu if (!(r->flags) || r->parent) 16278c3b329b9dd7097781cb900146e503e499cccfeYinghai Lu continue; 16378c3b329b9dd7097781cb900146e503e499cccfeYinghai Lu 16478c3b329b9dd7097781cb900146e503e499cccfeYinghai Lu r_align = pci_resource_alignment(dev, r); 16578c3b329b9dd7097781cb900146e503e499cccfeYinghai Lu if (!r_align) { 16678c3b329b9dd7097781cb900146e503e499cccfeYinghai Lu dev_warn(&dev->dev, "BAR %d: %pR has bogus alignment\n", 16778c3b329b9dd7097781cb900146e503e499cccfeYinghai Lu i, r); 16878c3b329b9dd7097781cb900146e503e499cccfeYinghai Lu continue; 16978c3b329b9dd7097781cb900146e503e499cccfeYinghai Lu } 17078c3b329b9dd7097781cb900146e503e499cccfeYinghai Lu for (list = head; ; list = list->next) { 17178c3b329b9dd7097781cb900146e503e499cccfeYinghai Lu resource_size_t align = 0; 17278c3b329b9dd7097781cb900146e503e499cccfeYinghai Lu struct resource_list *ln = list->next; 17378c3b329b9dd7097781cb900146e503e499cccfeYinghai Lu 17478c3b329b9dd7097781cb900146e503e499cccfeYinghai Lu if (ln) 17578c3b329b9dd7097781cb900146e503e499cccfeYinghai Lu align = pci_resource_alignment(ln->dev, ln->res); 17678c3b329b9dd7097781cb900146e503e499cccfeYinghai Lu 17778c3b329b9dd7097781cb900146e503e499cccfeYinghai Lu if (r_align > align) { 17878c3b329b9dd7097781cb900146e503e499cccfeYinghai Lu tmp = kmalloc(sizeof(*tmp), GFP_KERNEL); 17978c3b329b9dd7097781cb900146e503e499cccfeYinghai Lu if (!tmp) 18078c3b329b9dd7097781cb900146e503e499cccfeYinghai Lu panic("pdev_sort_resources(): " 18178c3b329b9dd7097781cb900146e503e499cccfeYinghai Lu "kmalloc() failed!\n"); 18278c3b329b9dd7097781cb900146e503e499cccfeYinghai Lu tmp->next = ln; 18378c3b329b9dd7097781cb900146e503e499cccfeYinghai Lu tmp->res = r; 18478c3b329b9dd7097781cb900146e503e499cccfeYinghai Lu tmp->dev = dev; 18578c3b329b9dd7097781cb900146e503e499cccfeYinghai Lu list->next = tmp; 18678c3b329b9dd7097781cb900146e503e499cccfeYinghai Lu break; 18778c3b329b9dd7097781cb900146e503e499cccfeYinghai Lu } 18878c3b329b9dd7097781cb900146e503e499cccfeYinghai Lu } 18978c3b329b9dd7097781cb900146e503e499cccfeYinghai Lu } 19078c3b329b9dd7097781cb900146e503e499cccfeYinghai Lu} 19178c3b329b9dd7097781cb900146e503e499cccfeYinghai Lu 1926841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lustatic void __dev_sort_resources(struct pci_dev *dev, 1936841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu struct resource_list *head) 1941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1956841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu u16 class = dev->class >> 8; 1961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1976841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu /* Don't touch classless devices or host bridges or ioapics. */ 1986841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu if (class == PCI_CLASS_NOT_DEFINED || class == PCI_CLASS_BRIDGE_HOST) 1996841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu return; 2001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2016841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu /* Don't touch ioapic devices already enabled by firmware */ 2026841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu if (class == PCI_CLASS_SYSTEM_PIC) { 2036841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu u16 command; 2046841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu pci_read_config_word(dev, PCI_COMMAND, &command); 2056841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu if (command & (PCI_COMMAND_IO | PCI_COMMAND_MEMORY)) 2066841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu return; 2076841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu } 2081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2096841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu pdev_sort_resources(dev, head); 2106841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu} 21123186279658cea6d42a050400d3e79c56cb459b4Satoru Takeuchi 212fc075e1da1b96ef65c32e83648055606b8204b58Ram Paistatic inline void reset_resource(struct resource *res) 213fc075e1da1b96ef65c32e83648055606b8204b58Ram Pai{ 214fc075e1da1b96ef65c32e83648055606b8204b58Ram Pai res->start = 0; 215fc075e1da1b96ef65c32e83648055606b8204b58Ram Pai res->end = 0; 216fc075e1da1b96ef65c32e83648055606b8204b58Ram Pai res->flags = 0; 217fc075e1da1b96ef65c32e83648055606b8204b58Ram Pai} 218fc075e1da1b96ef65c32e83648055606b8204b58Ram Pai 219c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai/** 2209e8bf93a7f416a3fa8fb6d76177d90e67bd45496Ram Pai * reassign_resources_sorted() - satisfy any additional resource requests 221c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * 2229e8bf93a7f416a3fa8fb6d76177d90e67bd45496Ram Pai * @realloc_head : head of the list tracking requests requiring additional 223c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * resources 224c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * @head : head of the list tracking requests with allocated 225c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * resources 226c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * 2279e8bf93a7f416a3fa8fb6d76177d90e67bd45496Ram Pai * Walk through each element of the realloc_head and try to procure 228c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * additional resources for the element, provided the element 229c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * is in the head list. 230c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai */ 2319e8bf93a7f416a3fa8fb6d76177d90e67bd45496Ram Paistatic void reassign_resources_sorted(struct resource_list_x *realloc_head, 232c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai struct resource_list *head) 2336841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu{ 2346841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu struct resource *res; 235c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai struct resource_list_x *list, *tmp, *prev; 236c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai struct resource_list *hlist; 237c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai resource_size_t add_size; 2386841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu int idx; 2391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2409e8bf93a7f416a3fa8fb6d76177d90e67bd45496Ram Pai prev = realloc_head; 2419e8bf93a7f416a3fa8fb6d76177d90e67bd45496Ram Pai for (list = realloc_head->next; list;) { 2421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds res = list->res; 243c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai /* skip resource that has been reset */ 244c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai if (!res->flags) 245c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai goto out; 246c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai 247c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai /* skip this resource if not found in head list */ 248c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai for (hlist = head->next; hlist && hlist->res != res; 249c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai hlist = hlist->next); 250c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai if (!hlist) { /* just skip */ 251c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai prev = list; 252c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai list = list->next; 253c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai continue; 254c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai } 255c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai 2561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds idx = res - &list->dev->resource[0]; 257c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai add_size=list->add_size; 2582bbc6942273b5b3097bd265d82227bdd84b351b2Ram Pai if (!resource_size(res)) { 2590a2daa1cf35004f5adbf4138555cc5669abf3a3eRam Pai res->start = list->start; 2602bbc6942273b5b3097bd265d82227bdd84b351b2Ram Pai res->end = res->start + add_size - 1; 2612bbc6942273b5b3097bd265d82227bdd84b351b2Ram Pai if(pci_assign_resource(list->dev, idx)) 262c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai reset_resource(res); 2632bbc6942273b5b3097bd265d82227bdd84b351b2Ram Pai } else { 2642bbc6942273b5b3097bd265d82227bdd84b351b2Ram Pai resource_size_t align = list->min_align; 2652bbc6942273b5b3097bd265d82227bdd84b351b2Ram Pai res->flags |= list->flags & (IORESOURCE_STARTALIGN|IORESOURCE_SIZEALIGN); 2662bbc6942273b5b3097bd265d82227bdd84b351b2Ram Pai if (pci_reassign_resource(list->dev, idx, add_size, align)) 2672bbc6942273b5b3097bd265d82227bdd84b351b2Ram Pai dev_printk(KERN_DEBUG, &list->dev->dev, "failed to add optional resources res=%pR\n", 2682bbc6942273b5b3097bd265d82227bdd84b351b2Ram Pai res); 269c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai } 270c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Paiout: 271c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai tmp = list; 272c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai prev->next = list = list->next; 273c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai kfree(tmp); 274c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai } 275c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai} 276c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai 277c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai/** 278c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * assign_requested_resources_sorted() - satisfy resource requests 279c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * 280c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * @head : head of the list tracking requests for resources 281c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * @failed_list : head of the list tracking requests that could 282c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * not be allocated 283c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * 284c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * Satisfy resource requests of each element in the list. Add 285c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * requests that could not satisfied to the failed_list. 286c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai */ 287c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Paistatic void assign_requested_resources_sorted(struct resource_list *head, 288c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai struct resource_list_x *fail_head) 289c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai{ 290c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai struct resource *res; 291c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai struct resource_list *list; 292c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai int idx; 2939a928660c9dcaff568c9d379655c5aa16fb981f8Yinghai Lu 294c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai for (list = head->next; list; list = list->next) { 295c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai res = list->res; 296c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai idx = res - &list->dev->resource[0]; 297c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai if (resource_size(res) && pci_assign_resource(list->dev, idx)) { 2989a928660c9dcaff568c9d379655c5aa16fb981f8Yinghai Lu if (fail_head && !pci_is_root_bus(list->dev->bus)) { 2999a928660c9dcaff568c9d379655c5aa16fb981f8Yinghai Lu /* 3009a928660c9dcaff568c9d379655c5aa16fb981f8Yinghai Lu * if the failed res is for ROM BAR, and it will 3019a928660c9dcaff568c9d379655c5aa16fb981f8Yinghai Lu * be enabled later, don't add it to the list 3029a928660c9dcaff568c9d379655c5aa16fb981f8Yinghai Lu */ 3039a928660c9dcaff568c9d379655c5aa16fb981f8Yinghai Lu if (!((idx == PCI_ROM_RESOURCE) && 3049a928660c9dcaff568c9d379655c5aa16fb981f8Yinghai Lu (!(res->flags & IORESOURCE_ROM_ENABLE)))) 3059a928660c9dcaff568c9d379655c5aa16fb981f8Yinghai Lu add_to_failed_list(fail_head, list->dev, res); 3069a928660c9dcaff568c9d379655c5aa16fb981f8Yinghai Lu } 307fc075e1da1b96ef65c32e83648055606b8204b58Ram Pai reset_resource(res); 308542df5de56a23bf2d94b75e2b304ab0e5a5508a8Rajesh Shah } 3091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 3101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 3111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 312c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Paistatic void __assign_resources_sorted(struct resource_list *head, 3139e8bf93a7f416a3fa8fb6d76177d90e67bd45496Ram Pai struct resource_list_x *realloc_head, 314c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai struct resource_list_x *fail_head) 315c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai{ 3163e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu /* 3173e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu * Should not assign requested resources at first. 3183e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu * they could be adjacent, so later reassign can not reallocate 3193e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu * them one by one in parent resource window. 3203e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu * Try to assign requested + add_size at begining 3213e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu * if could do that, could get out early. 3223e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu * if could not do that, we still try to assign requested at first, 3233e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu * then try to reassign add_size for some resources. 3243e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu */ 3253e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu struct resource_list_x save_head, local_fail_head, *list; 3263e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu struct resource_list *l; 3273e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu 3283e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu /* Check if optional add_size is there */ 3293e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu if (!realloc_head || !realloc_head->next) 3303e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu goto requested_and_reassign; 3313e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu 3323e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu /* Save original start, end, flags etc at first */ 3333e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu save_head.next = NULL; 3343e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu for (l = head->next; l; l = l->next) 3353e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu if (add_to_list(&save_head, l->dev, l->res, 0, 0)) { 3363e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu free_list(resource_list_x, &save_head); 3373e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu goto requested_and_reassign; 3383e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu } 3393e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu 3403e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu /* Update res in head list with add_size in realloc_head list */ 3413e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu for (l = head->next; l; l = l->next) 3423e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu l->res->end += get_res_add_size(realloc_head, l->res); 3433e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu 3443e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu /* Try updated head list with add_size added */ 3453e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu local_fail_head.next = NULL; 3463e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu assign_requested_resources_sorted(head, &local_fail_head); 3473e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu 3483e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu /* all assigned with add_size ? */ 3493e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu if (!local_fail_head.next) { 3503e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu /* Remove head list from realloc_head list */ 3513e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu for (l = head->next; l; l = l->next) 3523e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu remove_from_list(realloc_head, l->res); 3533e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu free_list(resource_list_x, &save_head); 3543e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu free_list(resource_list, head); 3553e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu return; 3563e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu } 3573e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu 3583e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu free_list(resource_list_x, &local_fail_head); 3593e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu /* Release assigned resource */ 3603e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu for (l = head->next; l; l = l->next) 3613e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu if (l->res->parent) 3623e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu release_resource(l->res); 3633e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu /* Restore start/end/flags from saved list */ 3643e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu for (list = save_head.next; list; list = list->next) { 3653e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu struct resource *res = list->res; 3663e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu 3673e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu res->start = list->start; 3683e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu res->end = list->end; 3693e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu res->flags = list->flags; 3703e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu } 3713e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu free_list(resource_list_x, &save_head); 3723e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu 3733e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lurequested_and_reassign: 374c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai /* Satisfy the must-have resource requests */ 375c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai assign_requested_resources_sorted(head, fail_head); 376c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai 3770a2daa1cf35004f5adbf4138555cc5669abf3a3eRam Pai /* Try to satisfy any additional optional resource 378c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai requests */ 3799e8bf93a7f416a3fa8fb6d76177d90e67bd45496Ram Pai if (realloc_head) 3809e8bf93a7f416a3fa8fb6d76177d90e67bd45496Ram Pai reassign_resources_sorted(realloc_head, head); 381c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai free_list(resource_list, head); 382c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai} 383c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai 3846841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lustatic void pdev_assign_resources_sorted(struct pci_dev *dev, 3858424d7592eab8245b51051ee458e598213bca3b2Yinghai Lu struct resource_list_x *add_head, 3866841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu struct resource_list_x *fail_head) 3876841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu{ 3886841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu struct resource_list head; 3896841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu 3906841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu head.next = NULL; 3916841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu __dev_sort_resources(dev, &head); 3928424d7592eab8245b51051ee458e598213bca3b2Yinghai Lu __assign_resources_sorted(&head, add_head, fail_head); 3936841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu 3946841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu} 3956841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu 3966841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lustatic void pbus_assign_resources_sorted(const struct pci_bus *bus, 3979e8bf93a7f416a3fa8fb6d76177d90e67bd45496Ram Pai struct resource_list_x *realloc_head, 3986841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu struct resource_list_x *fail_head) 3996841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu{ 4006841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu struct pci_dev *dev; 4016841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu struct resource_list head; 4026841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu 4036841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu head.next = NULL; 4046841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu list_for_each_entry(dev, &bus->devices, bus_list) 4056841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu __dev_sort_resources(dev, &head); 4066841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu 4079e8bf93a7f416a3fa8fb6d76177d90e67bd45496Ram Pai __assign_resources_sorted(&head, realloc_head, fail_head); 4086841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu} 4096841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu 410b3743fa4442fc172e950ff0eaf6aa96e7d5ce9beDominik Brodowskivoid pci_setup_cardbus(struct pci_bus *bus) 4111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 4121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct pci_dev *bridge = bus->self; 413c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas struct resource *res; 4141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct pci_bus_region region; 4151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 416865df576e8fc70daf297b53e61a4fbefc719d065Bjorn Helgaas dev_info(&bridge->dev, "CardBus bridge to [bus %02x-%02x]\n", 417865df576e8fc70daf297b53e61a4fbefc719d065Bjorn Helgaas bus->secondary, bus->subordinate); 4181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 419c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas res = bus->resource[0]; 420c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas pcibios_resource_to_bus(bridge, ®ion, res); 421c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas if (res->flags & IORESOURCE_IO) { 4221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* 4231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * The IO resource is allocated a range twice as large as it 4241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * would normally need. This allows us to set both IO regs. 4251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 426c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas dev_info(&bridge->dev, " bridge window %pR\n", res); 4271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_write_config_dword(bridge, PCI_CB_IO_BASE_0, 4281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds region.start); 4291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_write_config_dword(bridge, PCI_CB_IO_LIMIT_0, 4301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds region.end); 4311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 4321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 433c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas res = bus->resource[1]; 434c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas pcibios_resource_to_bus(bridge, ®ion, res); 435c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas if (res->flags & IORESOURCE_IO) { 436c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas dev_info(&bridge->dev, " bridge window %pR\n", res); 4371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_write_config_dword(bridge, PCI_CB_IO_BASE_1, 4381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds region.start); 4391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_write_config_dword(bridge, PCI_CB_IO_LIMIT_1, 4401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds region.end); 4411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 4421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 443c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas res = bus->resource[2]; 444c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas pcibios_resource_to_bus(bridge, ®ion, res); 445c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas if (res->flags & IORESOURCE_MEM) { 446c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas dev_info(&bridge->dev, " bridge window %pR\n", res); 4471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_write_config_dword(bridge, PCI_CB_MEMORY_BASE_0, 4481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds region.start); 4491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_write_config_dword(bridge, PCI_CB_MEMORY_LIMIT_0, 4501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds region.end); 4511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 4521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 453c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas res = bus->resource[3]; 454c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas pcibios_resource_to_bus(bridge, ®ion, res); 455c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas if (res->flags & IORESOURCE_MEM) { 456c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas dev_info(&bridge->dev, " bridge window %pR\n", res); 4571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_write_config_dword(bridge, PCI_CB_MEMORY_BASE_1, 4581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds region.start); 4591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_write_config_dword(bridge, PCI_CB_MEMORY_LIMIT_1, 4601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds region.end); 4611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 4621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 463b3743fa4442fc172e950ff0eaf6aa96e7d5ce9beDominik BrodowskiEXPORT_SYMBOL(pci_setup_cardbus); 4641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* Initialize bridges with base/limit values we have collected. 4661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds PCI-to-PCI Bridge Architecture Specification rev. 1.1 (1998) 4671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds requires that if there is no I/O ports or memory behind the 4681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bridge, corresponding range must be turned off by writing base 4691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds value greater than limit to the bridge's base/limit registers. 4701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds Note: care must be taken when updating I/O base/limit registers 4721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds of bridges which support 32-bit I/O. This update requires two 4731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds config space writes, so it's quite possible that an I/O window of 4741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds the bridge will have some undesirable address (e.g. 0) after the 4751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds first write. Ditto 64-bit prefetchable MMIO. */ 4767cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lustatic void pci_setup_bridge_io(struct pci_bus *bus) 4771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 4781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct pci_dev *bridge = bus->self; 479c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas struct resource *res; 4801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct pci_bus_region region; 4817cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu u32 l, io_upper16; 4821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Set up the top and bottom of the PCI I/O segment for this bus. */ 484c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas res = bus->resource[0]; 485c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas pcibios_resource_to_bus(bridge, ®ion, res); 486c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas if (res->flags & IORESOURCE_IO) { 4871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_read_config_dword(bridge, PCI_IO_BASE, &l); 4881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds l &= 0xffff0000; 4891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds l |= (region.start >> 8) & 0x00f0; 4901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds l |= region.end & 0xf000; 4911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Set up upper 16 bits of I/O base/limit. */ 4921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds io_upper16 = (region.end & 0xffff0000) | (region.start >> 16); 493c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas dev_info(&bridge->dev, " bridge window %pR\n", res); 4947cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu } else { 4951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Clear upper 16 bits of I/O base/limit. */ 4961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds io_upper16 = 0; 4971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds l = 0x00f0; 4981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 4991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Temporarily disable the I/O range before updating PCI_IO_BASE. */ 5001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_write_config_dword(bridge, PCI_IO_BASE_UPPER16, 0x0000ffff); 5011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Update lower 16 bits of I/O base/limit. */ 5021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_write_config_dword(bridge, PCI_IO_BASE, l); 5031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Update upper 16 bits of I/O base/limit. */ 5041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_write_config_dword(bridge, PCI_IO_BASE_UPPER16, io_upper16); 5057cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu} 5067cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu 5077cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lustatic void pci_setup_bridge_mmio(struct pci_bus *bus) 5087cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu{ 5097cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu struct pci_dev *bridge = bus->self; 5107cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu struct resource *res; 5117cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu struct pci_bus_region region; 5127cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu u32 l; 5131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5147cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu /* Set up the top and bottom of the PCI Memory segment for this bus. */ 515c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas res = bus->resource[1]; 516c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas pcibios_resource_to_bus(bridge, ®ion, res); 517c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas if (res->flags & IORESOURCE_MEM) { 5181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds l = (region.start >> 16) & 0xfff0; 5191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds l |= region.end & 0xfff00000; 520c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas dev_info(&bridge->dev, " bridge window %pR\n", res); 5217cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu } else { 5221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds l = 0x0000fff0; 5231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 5241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_write_config_dword(bridge, PCI_MEMORY_BASE, l); 5257cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu} 5267cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu 5277cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lustatic void pci_setup_bridge_mmio_pref(struct pci_bus *bus) 5287cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu{ 5297cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu struct pci_dev *bridge = bus->self; 5307cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu struct resource *res; 5317cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu struct pci_bus_region region; 5327cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu u32 l, bu, lu; 5331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Clear out the upper 32 bits of PREF limit. 5351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds If PCI_PREF_BASE_UPPER32 was non-zero, this temporarily 5361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds disables PREF range, which is ok. */ 5371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_write_config_dword(bridge, PCI_PREF_LIMIT_UPPER32, 0); 5381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Set up PREF base/limit. */ 540c40a22e0ce5eb400f27449e59e43d021bee58b8dBenjamin Herrenschmidt bu = lu = 0; 541c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas res = bus->resource[2]; 542c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas pcibios_resource_to_bus(bridge, ®ion, res); 543c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas if (res->flags & IORESOURCE_PREFETCH) { 5441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds l = (region.start >> 16) & 0xfff0; 5451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds l |= region.end & 0xfff00000; 546c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas if (res->flags & IORESOURCE_MEM_64) { 5471f82de10d6b1d845155363c895c552e61b36b51aYinghai Lu bu = upper_32_bits(region.start); 5481f82de10d6b1d845155363c895c552e61b36b51aYinghai Lu lu = upper_32_bits(region.end); 5491f82de10d6b1d845155363c895c552e61b36b51aYinghai Lu } 550c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas dev_info(&bridge->dev, " bridge window %pR\n", res); 5517cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu } else { 5521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds l = 0x0000fff0; 5531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 5541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_write_config_dword(bridge, PCI_PREF_MEMORY_BASE, l); 5551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 55659353ea30e65ab3ae181d6175e3212e1361c3787Alex Williamson /* Set the upper 32 bits of PREF base & limit. */ 55759353ea30e65ab3ae181d6175e3212e1361c3787Alex Williamson pci_write_config_dword(bridge, PCI_PREF_BASE_UPPER32, bu); 55859353ea30e65ab3ae181d6175e3212e1361c3787Alex Williamson pci_write_config_dword(bridge, PCI_PREF_LIMIT_UPPER32, lu); 5597cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu} 5607cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu 5617cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lustatic void __pci_setup_bridge(struct pci_bus *bus, unsigned long type) 5627cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu{ 5637cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu struct pci_dev *bridge = bus->self; 5647cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu 5657cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu dev_info(&bridge->dev, "PCI bridge to [bus %02x-%02x]\n", 5667cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu bus->secondary, bus->subordinate); 5677cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu 5687cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu if (type & IORESOURCE_IO) 5697cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu pci_setup_bridge_io(bus); 5707cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu 5717cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu if (type & IORESOURCE_MEM) 5727cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu pci_setup_bridge_mmio(bus); 5737cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu 5747cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu if (type & IORESOURCE_PREFETCH) 5757cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu pci_setup_bridge_mmio_pref(bus); 5761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_write_config_word(bridge, PCI_BRIDGE_CONTROL, bus->bridge_ctl); 5781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 5791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 580e24442733ee486c99d03fe2ecd98924d1bc14c51Benjamin Herrenschmidtvoid pci_setup_bridge(struct pci_bus *bus) 5817cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu{ 5827cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu unsigned long type = IORESOURCE_IO | IORESOURCE_MEM | 5837cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu IORESOURCE_PREFETCH; 5847cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu 5857cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu __pci_setup_bridge(bus, type); 5867cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu} 5877cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu 5881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* Check whether the bridge supports optional I/O and 5891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds prefetchable memory ranges. If not, the respective 5901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds base/limit registers must be read-only and read as 0. */ 59196bde06a2df1b363206d3cdef53134b84ff37813Sam Ravnborgstatic void pci_bridge_check_ranges(struct pci_bus *bus) 5921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 5931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u16 io; 5941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u32 pmem; 5951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct pci_dev *bridge = bus->self; 5961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct resource *b_res; 5971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds b_res = &bridge->resource[PCI_BRIDGE_RESOURCES]; 5991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds b_res[1].flags |= IORESOURCE_MEM; 6001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_read_config_word(bridge, PCI_IO_BASE, &io); 6021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!io) { 6031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_write_config_word(bridge, PCI_IO_BASE, 0xf0f0); 6041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_read_config_word(bridge, PCI_IO_BASE, &io); 6051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_write_config_word(bridge, PCI_IO_BASE, 0x0); 6061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 6071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (io) 6081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds b_res[0].flags |= IORESOURCE_IO; 6091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* DECchip 21050 pass 2 errata: the bridge may miss an address 6101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds disconnect boundary by one PCI data phase. 6111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds Workaround: do not use prefetching on this device. */ 6121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (bridge->vendor == PCI_VENDOR_ID_DEC && bridge->device == 0x0001) 6131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return; 6141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_read_config_dword(bridge, PCI_PREF_MEMORY_BASE, &pmem); 6151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!pmem) { 6161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_write_config_dword(bridge, PCI_PREF_MEMORY_BASE, 6171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0xfff0fff0); 6181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_read_config_dword(bridge, PCI_PREF_MEMORY_BASE, &pmem); 6191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_write_config_dword(bridge, PCI_PREF_MEMORY_BASE, 0x0); 6201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 6211f82de10d6b1d845155363c895c552e61b36b51aYinghai Lu if (pmem) { 6221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds b_res[2].flags |= IORESOURCE_MEM | IORESOURCE_PREFETCH; 6239958610552c0bd7558b41cb8addbd865587f142aYinghai Lu if ((pmem & PCI_PREF_RANGE_TYPE_MASK) == 6249958610552c0bd7558b41cb8addbd865587f142aYinghai Lu PCI_PREF_RANGE_TYPE_64) { 6251f82de10d6b1d845155363c895c552e61b36b51aYinghai Lu b_res[2].flags |= IORESOURCE_MEM_64; 6269958610552c0bd7558b41cb8addbd865587f142aYinghai Lu b_res[2].flags |= PCI_PREF_RANGE_TYPE_64; 6279958610552c0bd7558b41cb8addbd865587f142aYinghai Lu } 6281f82de10d6b1d845155363c895c552e61b36b51aYinghai Lu } 6291f82de10d6b1d845155363c895c552e61b36b51aYinghai Lu 6301f82de10d6b1d845155363c895c552e61b36b51aYinghai Lu /* double check if bridge does support 64 bit pref */ 6311f82de10d6b1d845155363c895c552e61b36b51aYinghai Lu if (b_res[2].flags & IORESOURCE_MEM_64) { 6321f82de10d6b1d845155363c895c552e61b36b51aYinghai Lu u32 mem_base_hi, tmp; 6331f82de10d6b1d845155363c895c552e61b36b51aYinghai Lu pci_read_config_dword(bridge, PCI_PREF_BASE_UPPER32, 6341f82de10d6b1d845155363c895c552e61b36b51aYinghai Lu &mem_base_hi); 6351f82de10d6b1d845155363c895c552e61b36b51aYinghai Lu pci_write_config_dword(bridge, PCI_PREF_BASE_UPPER32, 6361f82de10d6b1d845155363c895c552e61b36b51aYinghai Lu 0xffffffff); 6371f82de10d6b1d845155363c895c552e61b36b51aYinghai Lu pci_read_config_dword(bridge, PCI_PREF_BASE_UPPER32, &tmp); 6381f82de10d6b1d845155363c895c552e61b36b51aYinghai Lu if (!tmp) 6391f82de10d6b1d845155363c895c552e61b36b51aYinghai Lu b_res[2].flags &= ~IORESOURCE_MEM_64; 6401f82de10d6b1d845155363c895c552e61b36b51aYinghai Lu pci_write_config_dword(bridge, PCI_PREF_BASE_UPPER32, 6411f82de10d6b1d845155363c895c552e61b36b51aYinghai Lu mem_base_hi); 6421f82de10d6b1d845155363c895c552e61b36b51aYinghai Lu } 6431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 6441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* Helper function for sizing routines: find first available 6461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bus resource of a given type. Note: we intentionally skip 6471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds the bus resources which have already been assigned (that is, 6481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds have non-NULL parent resource). */ 64996bde06a2df1b363206d3cdef53134b84ff37813Sam Ravnborgstatic struct resource *find_free_bus_resource(struct pci_bus *bus, unsigned long type) 6501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 6511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int i; 6521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct resource *r; 6531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long type_mask = IORESOURCE_IO | IORESOURCE_MEM | 6541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds IORESOURCE_PREFETCH; 6551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 65689a74ecccd1f78e51faf6287e5c0e93a92ac096eBjorn Helgaas pci_bus_for_each_resource(bus, r, i) { 657299de0343c7d18448a69c635378342e9214b14afIvan Kokshaysky if (r == &ioport_resource || r == &iomem_resource) 658299de0343c7d18448a69c635378342e9214b14afIvan Kokshaysky continue; 65955a1098476619d5d8f4cdae7240ea759274dead7Jesse Barnes if (r && (r->flags & type_mask) == type && !r->parent) 66055a1098476619d5d8f4cdae7240ea759274dead7Jesse Barnes return r; 6611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 6621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return NULL; 6631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 6641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 66513583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Paistatic resource_size_t calculate_iosize(resource_size_t size, 66613583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai resource_size_t min_size, 66713583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai resource_size_t size1, 66813583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai resource_size_t old_size, 66913583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai resource_size_t align) 67013583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai{ 67113583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai if (size < min_size) 67213583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai size = min_size; 67313583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai if (old_size == 1 ) 67413583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai old_size = 0; 67513583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai /* To be fixed in 2.5: we should have sort of HAVE_ISA 67613583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai flag in the struct pci_bus. */ 67713583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai#if defined(CONFIG_ISA) || defined(CONFIG_EISA) 67813583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai size = (size & 0xff) + ((size & ~0xffUL) << 2); 67913583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai#endif 68013583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai size = ALIGN(size + size1, align); 68113583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai if (size < old_size) 68213583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai size = old_size; 68313583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai return size; 68413583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai} 68513583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai 68613583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Paistatic resource_size_t calculate_memsize(resource_size_t size, 68713583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai resource_size_t min_size, 68813583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai resource_size_t size1, 68913583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai resource_size_t old_size, 69013583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai resource_size_t align) 69113583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai{ 69213583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai if (size < min_size) 69313583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai size = min_size; 69413583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai if (old_size == 1 ) 69513583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai old_size = 0; 69613583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai if (size < old_size) 69713583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai size = old_size; 69813583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai size = ALIGN(size + size1, align); 69913583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai return size; 70013583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai} 70113583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai 702c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai/** 703c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * pbus_size_io() - size the io window of a given bus 704c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * 705c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * @bus : the bus 706c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * @min_size : the minimum io window that must to be allocated 707c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * @add_size : additional optional io window 7089e8bf93a7f416a3fa8fb6d76177d90e67bd45496Ram Pai * @realloc_head : track the additional io window on this list 709c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * 710c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * Sizing the IO windows of the PCI-PCI bridge is trivial, 711c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * since these windows have 4K granularity and the IO ranges 712c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * of non-bridge PCI devices are limited to 256 bytes. 713c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * We must be careful with the ISA aliasing though. 714c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai */ 715c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Paistatic void pbus_size_io(struct pci_bus *bus, resource_size_t min_size, 7169e8bf93a7f416a3fa8fb6d76177d90e67bd45496Ram Pai resource_size_t add_size, struct resource_list_x *realloc_head) 7171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 7181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct pci_dev *dev; 7191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct resource *b_res = find_free_bus_resource(bus, IORESOURCE_IO); 720c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai unsigned long size = 0, size0 = 0, size1 = 0; 721be768912a49b10b68e96fbd8fa3cab0adfbd3091Yinghai Lu resource_size_t children_add_size = 0; 7221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!b_res) 7241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return; 7251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds list_for_each_entry(dev, &bus->devices, bus_list) { 7271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int i; 7281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (i = 0; i < PCI_NUM_RESOURCES; i++) { 7301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct resource *r = &dev->resource[i]; 7311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long r_size; 7321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (r->parent || !(r->flags & IORESOURCE_IO)) 7341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds continue; 735022edd86d7c864bc8fadc3c8ac4e6a464472ab05Zhao, Yu r_size = resource_size(r); 7361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (r_size < 0x400) 7381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Might be re-aligned for ISA */ 7391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds size += r_size; 7401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 7411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds size1 += r_size; 742be768912a49b10b68e96fbd8fa3cab0adfbd3091Yinghai Lu 7439e8bf93a7f416a3fa8fb6d76177d90e67bd45496Ram Pai if (realloc_head) 7449e8bf93a7f416a3fa8fb6d76177d90e67bd45496Ram Pai children_add_size += get_res_add_size(realloc_head, r); 7451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 7461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 747c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai size0 = calculate_iosize(size, min_size, size1, 748c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai resource_size(b_res), 4096); 749be768912a49b10b68e96fbd8fa3cab0adfbd3091Yinghai Lu if (children_add_size > add_size) 750be768912a49b10b68e96fbd8fa3cab0adfbd3091Yinghai Lu add_size = children_add_size; 7519e8bf93a7f416a3fa8fb6d76177d90e67bd45496Ram Pai size1 = (!realloc_head || (realloc_head && !add_size)) ? size0 : 752a4ac9fea016fc5c09227eb479bd35e34978323a4Yinghai Lu calculate_iosize(size, min_size, add_size + size1, 75313583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai resource_size(b_res), 4096); 754c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai if (!size0 && !size1) { 755865df576e8fc70daf297b53e61a4fbefc719d065Bjorn Helgaas if (b_res->start || b_res->end) 756865df576e8fc70daf297b53e61a4fbefc719d065Bjorn Helgaas dev_info(&bus->self->dev, "disabling bridge window " 757865df576e8fc70daf297b53e61a4fbefc719d065Bjorn Helgaas "%pR to [bus %02x-%02x] (unused)\n", b_res, 758865df576e8fc70daf297b53e61a4fbefc719d065Bjorn Helgaas bus->secondary, bus->subordinate); 7591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds b_res->flags = 0; 7601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return; 7611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 7621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Alignment of the IO window is always 4K */ 7631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds b_res->start = 4096; 764c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai b_res->end = b_res->start + size0 - 1; 765884525655d07fdee9245716b998ecdc45cdd8007Ivan Kokshaysky b_res->flags |= IORESOURCE_STARTALIGN; 7669e8bf93a7f416a3fa8fb6d76177d90e67bd45496Ram Pai if (size1 > size0 && realloc_head) 7679e8bf93a7f416a3fa8fb6d76177d90e67bd45496Ram Pai add_to_list(realloc_head, bus->self, b_res, size1-size0, 4096); 7681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 7691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 770c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai/** 771c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * pbus_size_mem() - size the memory window of a given bus 772c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * 773c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * @bus : the bus 774c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * @min_size : the minimum memory window that must to be allocated 775c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * @add_size : additional optional memory window 7769e8bf93a7f416a3fa8fb6d76177d90e67bd45496Ram Pai * @realloc_head : track the additional memory window on this list 777c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * 778c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * Calculate the size of the bus and minimal alignment which 779c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * guarantees that all child resources fit in this size. 780c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai */ 78128760489a3f1e136c5ae8581c0fa8f63511f2f4cEric W. Biedermanstatic int pbus_size_mem(struct pci_bus *bus, unsigned long mask, 782c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai unsigned long type, resource_size_t min_size, 783c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai resource_size_t add_size, 7849e8bf93a7f416a3fa8fb6d76177d90e67bd45496Ram Pai struct resource_list_x *realloc_head) 7851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 7861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct pci_dev *dev; 787c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai resource_size_t min_align, align, size, size0, size1; 788c40a22e0ce5eb400f27449e59e43d021bee58b8dBenjamin Herrenschmidt resource_size_t aligns[12]; /* Alignments from 1Mb to 2Gb */ 7891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int order, max_order; 7901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct resource *b_res = find_free_bus_resource(bus, type); 7911f82de10d6b1d845155363c895c552e61b36b51aYinghai Lu unsigned int mem64_mask = 0; 792be768912a49b10b68e96fbd8fa3cab0adfbd3091Yinghai Lu resource_size_t children_add_size = 0; 7931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!b_res) 7951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 7961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds memset(aligns, 0, sizeof(aligns)); 7981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds max_order = 0; 7991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds size = 0; 8001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8011f82de10d6b1d845155363c895c552e61b36b51aYinghai Lu mem64_mask = b_res->flags & IORESOURCE_MEM_64; 8021f82de10d6b1d845155363c895c552e61b36b51aYinghai Lu b_res->flags &= ~IORESOURCE_MEM_64; 8031f82de10d6b1d845155363c895c552e61b36b51aYinghai Lu 8041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds list_for_each_entry(dev, &bus->devices, bus_list) { 8051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int i; 8061f82de10d6b1d845155363c895c552e61b36b51aYinghai Lu 8071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (i = 0; i < PCI_NUM_RESOURCES; i++) { 8081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct resource *r = &dev->resource[i]; 809c40a22e0ce5eb400f27449e59e43d021bee58b8dBenjamin Herrenschmidt resource_size_t r_size; 8101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (r->parent || (r->flags & mask) != type) 8121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds continue; 813022edd86d7c864bc8fadc3c8ac4e6a464472ab05Zhao, Yu r_size = resource_size(r); 8142aceefcbd5a73059e5f52831817ec277e987440dYinghai Lu#ifdef CONFIG_PCI_IOV 8152aceefcbd5a73059e5f52831817ec277e987440dYinghai Lu /* put SRIOV requested res to the optional list */ 8169e8bf93a7f416a3fa8fb6d76177d90e67bd45496Ram Pai if (realloc_head && i >= PCI_IOV_RESOURCES && 8172aceefcbd5a73059e5f52831817ec277e987440dYinghai Lu i <= PCI_IOV_RESOURCE_END) { 8182aceefcbd5a73059e5f52831817ec277e987440dYinghai Lu r->end = r->start - 1; 8199e8bf93a7f416a3fa8fb6d76177d90e67bd45496Ram Pai add_to_list(realloc_head, dev, r, r_size, 0/* dont' care */); 8202aceefcbd5a73059e5f52831817ec277e987440dYinghai Lu children_add_size += r_size; 8212aceefcbd5a73059e5f52831817ec277e987440dYinghai Lu continue; 8222aceefcbd5a73059e5f52831817ec277e987440dYinghai Lu } 8232aceefcbd5a73059e5f52831817ec277e987440dYinghai Lu#endif 8241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* For bridges size != alignment */ 8256faf17f6f1ffc586d16efc2f9fa2083a7785ee74Chris Wright align = pci_resource_alignment(dev, r); 8261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds order = __ffs(align) - 20; 8271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (order > 11) { 828865df576e8fc70daf297b53e61a4fbefc719d065Bjorn Helgaas dev_warn(&dev->dev, "disabling BAR %d: %pR " 829865df576e8fc70daf297b53e61a4fbefc719d065Bjorn Helgaas "(bad alignment %#llx)\n", i, r, 830865df576e8fc70daf297b53e61a4fbefc719d065Bjorn Helgaas (unsigned long long) align); 8311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds r->flags = 0; 8321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds continue; 8331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 8341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds size += r_size; 8351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (order < 0) 8361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds order = 0; 8371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Exclude ranges with size > align from 8381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds calculation of the alignment. */ 8391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (r_size == align) 8401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds aligns[order] += align; 8411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (order > max_order) 8421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds max_order = order; 8431f82de10d6b1d845155363c895c552e61b36b51aYinghai Lu mem64_mask &= r->flags & IORESOURCE_MEM_64; 844be768912a49b10b68e96fbd8fa3cab0adfbd3091Yinghai Lu 8459e8bf93a7f416a3fa8fb6d76177d90e67bd45496Ram Pai if (realloc_head) 8469e8bf93a7f416a3fa8fb6d76177d90e67bd45496Ram Pai children_add_size += get_res_add_size(realloc_head, r); 8471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 8481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 8491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds align = 0; 8501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds min_align = 0; 8511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (order = 0; order <= max_order; order++) { 8528308c54d7e312f7a03e2ce2057d0837e6fe3843fJeremy Fitzhardinge resource_size_t align1 = 1; 8538308c54d7e312f7a03e2ce2057d0837e6fe3843fJeremy Fitzhardinge 8548308c54d7e312f7a03e2ce2057d0837e6fe3843fJeremy Fitzhardinge align1 <<= (order + 20); 8558308c54d7e312f7a03e2ce2057d0837e6fe3843fJeremy Fitzhardinge 8561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!align) 8571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds min_align = align1; 8586f6f8c2f4b59711857d14ada8e70309d52e8fae4Milind Arun Choudhary else if (ALIGN(align + min_align, min_align) < align1) 8591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds min_align = align1 >> 1; 8601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds align += aligns[order]; 8611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 862b42282e5a05018ecdc0d63a4ad530b0999785912Linus Torvalds size0 = calculate_memsize(size, min_size, 0, resource_size(b_res), min_align); 863be768912a49b10b68e96fbd8fa3cab0adfbd3091Yinghai Lu if (children_add_size > add_size) 864be768912a49b10b68e96fbd8fa3cab0adfbd3091Yinghai Lu add_size = children_add_size; 8659e8bf93a7f416a3fa8fb6d76177d90e67bd45496Ram Pai size1 = (!realloc_head || (realloc_head && !add_size)) ? size0 : 866a4ac9fea016fc5c09227eb479bd35e34978323a4Yinghai Lu calculate_memsize(size, min_size, add_size, 867b42282e5a05018ecdc0d63a4ad530b0999785912Linus Torvalds resource_size(b_res), min_align); 868c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai if (!size0 && !size1) { 869865df576e8fc70daf297b53e61a4fbefc719d065Bjorn Helgaas if (b_res->start || b_res->end) 870865df576e8fc70daf297b53e61a4fbefc719d065Bjorn Helgaas dev_info(&bus->self->dev, "disabling bridge window " 871865df576e8fc70daf297b53e61a4fbefc719d065Bjorn Helgaas "%pR to [bus %02x-%02x] (unused)\n", b_res, 872865df576e8fc70daf297b53e61a4fbefc719d065Bjorn Helgaas bus->secondary, bus->subordinate); 8731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds b_res->flags = 0; 8741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 1; 8751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 8761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds b_res->start = min_align; 877c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai b_res->end = size0 + min_align - 1; 878c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai b_res->flags |= IORESOURCE_STARTALIGN | mem64_mask; 8799e8bf93a7f416a3fa8fb6d76177d90e67bd45496Ram Pai if (size1 > size0 && realloc_head) 8809e8bf93a7f416a3fa8fb6d76177d90e67bd45496Ram Pai add_to_list(realloc_head, bus->self, b_res, size1-size0, min_align); 8811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 1; 8821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 8831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8840a2daa1cf35004f5adbf4138555cc5669abf3a3eRam Paiunsigned long pci_cardbus_resource_alignment(struct resource *res) 8850a2daa1cf35004f5adbf4138555cc5669abf3a3eRam Pai{ 8860a2daa1cf35004f5adbf4138555cc5669abf3a3eRam Pai if (res->flags & IORESOURCE_IO) 8870a2daa1cf35004f5adbf4138555cc5669abf3a3eRam Pai return pci_cardbus_io_size; 8880a2daa1cf35004f5adbf4138555cc5669abf3a3eRam Pai if (res->flags & IORESOURCE_MEM) 8890a2daa1cf35004f5adbf4138555cc5669abf3a3eRam Pai return pci_cardbus_mem_size; 8900a2daa1cf35004f5adbf4138555cc5669abf3a3eRam Pai return 0; 8910a2daa1cf35004f5adbf4138555cc5669abf3a3eRam Pai} 8920a2daa1cf35004f5adbf4138555cc5669abf3a3eRam Pai 8930a2daa1cf35004f5adbf4138555cc5669abf3a3eRam Paistatic void pci_bus_size_cardbus(struct pci_bus *bus, 8949e8bf93a7f416a3fa8fb6d76177d90e67bd45496Ram Pai struct resource_list_x *realloc_head) 8951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 8961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct pci_dev *bridge = bus->self; 8971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct resource *b_res = &bridge->resource[PCI_BRIDGE_RESOURCES]; 8981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u16 ctrl; 8991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* 9011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Reserve some resources for CardBus. We reserve 9021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * a fixed amount of bus space for CardBus bridges. 9031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 904934b7024f0ed29003c95cef447d92737ab86dc4fLinus Torvalds b_res[0].start = 0; 905934b7024f0ed29003c95cef447d92737ab86dc4fLinus Torvalds b_res[0].flags |= IORESOURCE_IO | IORESOURCE_SIZEALIGN; 9069e8bf93a7f416a3fa8fb6d76177d90e67bd45496Ram Pai if (realloc_head) 9079e8bf93a7f416a3fa8fb6d76177d90e67bd45496Ram Pai add_to_list(realloc_head, bridge, b_res, pci_cardbus_io_size, 0 /* dont care */); 9081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 909934b7024f0ed29003c95cef447d92737ab86dc4fLinus Torvalds b_res[1].start = 0; 910934b7024f0ed29003c95cef447d92737ab86dc4fLinus Torvalds b_res[1].flags |= IORESOURCE_IO | IORESOURCE_SIZEALIGN; 9119e8bf93a7f416a3fa8fb6d76177d90e67bd45496Ram Pai if (realloc_head) 9129e8bf93a7f416a3fa8fb6d76177d90e67bd45496Ram Pai add_to_list(realloc_head, bridge, b_res+1, pci_cardbus_io_size, 0 /* dont care */); 9131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* 9151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Check whether prefetchable memory is supported 9161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * by this bridge. 9171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 9181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_read_config_word(bridge, PCI_CB_BRIDGE_CONTROL, &ctrl); 9191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!(ctrl & PCI_CB_BRIDGE_CTL_PREFETCH_MEM0)) { 9201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ctrl |= PCI_CB_BRIDGE_CTL_PREFETCH_MEM0; 9211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_write_config_word(bridge, PCI_CB_BRIDGE_CONTROL, ctrl); 9221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_read_config_word(bridge, PCI_CB_BRIDGE_CONTROL, &ctrl); 9231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 9241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* 9261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * If we have prefetchable memory support, allocate 9271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * two regions. Otherwise, allocate one region of 9281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * twice the size. 9291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 9301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (ctrl & PCI_CB_BRIDGE_CTL_PREFETCH_MEM0) { 931934b7024f0ed29003c95cef447d92737ab86dc4fLinus Torvalds b_res[2].start = 0; 932934b7024f0ed29003c95cef447d92737ab86dc4fLinus Torvalds b_res[2].flags |= IORESOURCE_MEM | IORESOURCE_PREFETCH | IORESOURCE_SIZEALIGN; 9339e8bf93a7f416a3fa8fb6d76177d90e67bd45496Ram Pai if (realloc_head) 9349e8bf93a7f416a3fa8fb6d76177d90e67bd45496Ram Pai add_to_list(realloc_head, bridge, b_res+2, pci_cardbus_mem_size, 0 /* dont care */); 9351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 936934b7024f0ed29003c95cef447d92737ab86dc4fLinus Torvalds b_res[3].start = 0; 937934b7024f0ed29003c95cef447d92737ab86dc4fLinus Torvalds b_res[3].flags |= IORESOURCE_MEM | IORESOURCE_SIZEALIGN; 9389e8bf93a7f416a3fa8fb6d76177d90e67bd45496Ram Pai if (realloc_head) 9399e8bf93a7f416a3fa8fb6d76177d90e67bd45496Ram Pai add_to_list(realloc_head, bridge, b_res+3, pci_cardbus_mem_size, 0 /* dont care */); 9401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else { 941934b7024f0ed29003c95cef447d92737ab86dc4fLinus Torvalds b_res[3].start = 0; 942934b7024f0ed29003c95cef447d92737ab86dc4fLinus Torvalds b_res[3].flags |= IORESOURCE_MEM | IORESOURCE_SIZEALIGN; 9439e8bf93a7f416a3fa8fb6d76177d90e67bd45496Ram Pai if (realloc_head) 9449e8bf93a7f416a3fa8fb6d76177d90e67bd45496Ram Pai add_to_list(realloc_head, bridge, b_res+3, pci_cardbus_mem_size * 2, 0 /* dont care */); 9451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 9460a2daa1cf35004f5adbf4138555cc5669abf3a3eRam Pai 9470a2daa1cf35004f5adbf4138555cc5669abf3a3eRam Pai /* set the size of the resource to zero, so that the resource does not 9480a2daa1cf35004f5adbf4138555cc5669abf3a3eRam Pai * get assigned during required-resource allocation cycle but gets assigned 9490a2daa1cf35004f5adbf4138555cc5669abf3a3eRam Pai * during the optional-resource allocation cycle. 9500a2daa1cf35004f5adbf4138555cc5669abf3a3eRam Pai */ 9510a2daa1cf35004f5adbf4138555cc5669abf3a3eRam Pai b_res[0].start = b_res[1].start = b_res[2].start = b_res[3].start = 1; 9520a2daa1cf35004f5adbf4138555cc5669abf3a3eRam Pai b_res[0].end = b_res[1].end = b_res[2].end = b_res[3].end = 0; 9531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 9541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 955c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Paivoid __ref __pci_bus_size_bridges(struct pci_bus *bus, 9569e8bf93a7f416a3fa8fb6d76177d90e67bd45496Ram Pai struct resource_list_x *realloc_head) 9571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 9581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct pci_dev *dev; 9591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long mask, prefmask; 960c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai resource_size_t additional_mem_size = 0, additional_io_size = 0; 9611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds list_for_each_entry(dev, &bus->devices, bus_list) { 9631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct pci_bus *b = dev->subordinate; 9641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!b) 9651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds continue; 9661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds switch (dev->class >> 8) { 9681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case PCI_CLASS_BRIDGE_CARDBUS: 9699e8bf93a7f416a3fa8fb6d76177d90e67bd45496Ram Pai pci_bus_size_cardbus(b, realloc_head); 9701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 9711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case PCI_CLASS_BRIDGE_PCI: 9731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds default: 9749e8bf93a7f416a3fa8fb6d76177d90e67bd45496Ram Pai __pci_bus_size_bridges(b, realloc_head); 9751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 9761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 9771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 9781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* The root bus? */ 9801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!bus->self) 9811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return; 9821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds switch (bus->self->class >> 8) { 9841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case PCI_CLASS_BRIDGE_CARDBUS: 9851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* don't size cardbuses yet. */ 9861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 9871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case PCI_CLASS_BRIDGE_PCI: 9891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_bridge_check_ranges(bus); 99028760489a3f1e136c5ae8581c0fa8f63511f2f4cEric W. Biederman if (bus->self->is_hotplug_bridge) { 991c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai additional_io_size = pci_hotplug_io_size; 992c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai additional_mem_size = pci_hotplug_mem_size; 99328760489a3f1e136c5ae8581c0fa8f63511f2f4cEric W. Biederman } 994c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai /* 995c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * Follow thru 996c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai */ 9971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds default: 99819aa7ee432cec00b647443719eb5c055b69a5e8eYinghai Lu pbus_size_io(bus, realloc_head ? 0 : additional_io_size, 99919aa7ee432cec00b647443719eb5c055b69a5e8eYinghai Lu additional_io_size, realloc_head); 10001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* If the bridge supports prefetchable range, size it 10011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds separately. If it doesn't, or its prefetchable window 10021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds has already been allocated by arch code, try 10031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds non-prefetchable range for both types of PCI memory 10041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds resources. */ 10051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mask = IORESOURCE_MEM; 10061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds prefmask = IORESOURCE_MEM | IORESOURCE_PREFETCH; 100719aa7ee432cec00b647443719eb5c055b69a5e8eYinghai Lu if (pbus_size_mem(bus, prefmask, prefmask, 100819aa7ee432cec00b647443719eb5c055b69a5e8eYinghai Lu realloc_head ? 0 : additional_mem_size, 100919aa7ee432cec00b647443719eb5c055b69a5e8eYinghai Lu additional_mem_size, realloc_head)) 10101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mask = prefmask; /* Success, size non-prefetch only. */ 101128760489a3f1e136c5ae8581c0fa8f63511f2f4cEric W. Biederman else 1012c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai additional_mem_size += additional_mem_size; 101319aa7ee432cec00b647443719eb5c055b69a5e8eYinghai Lu pbus_size_mem(bus, mask, IORESOURCE_MEM, 101419aa7ee432cec00b647443719eb5c055b69a5e8eYinghai Lu realloc_head ? 0 : additional_mem_size, 101519aa7ee432cec00b647443719eb5c055b69a5e8eYinghai Lu additional_mem_size, realloc_head); 10161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 10171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 10181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 1019c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai 1020c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Paivoid __ref pci_bus_size_bridges(struct pci_bus *bus) 1021c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai{ 1022c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai __pci_bus_size_bridges(bus, NULL); 1023c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai} 10241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL(pci_bus_size_bridges); 10251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1026568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lustatic void __ref __pci_bus_assign_resources(const struct pci_bus *bus, 10279e8bf93a7f416a3fa8fb6d76177d90e67bd45496Ram Pai struct resource_list_x *realloc_head, 1028568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu struct resource_list_x *fail_head) 10291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 10301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct pci_bus *b; 10311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct pci_dev *dev; 10321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10339e8bf93a7f416a3fa8fb6d76177d90e67bd45496Ram Pai pbus_assign_resources_sorted(bus, realloc_head, fail_head); 10341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds list_for_each_entry(dev, &bus->devices, bus_list) { 10361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds b = dev->subordinate; 10371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!b) 10381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds continue; 10391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10409e8bf93a7f416a3fa8fb6d76177d90e67bd45496Ram Pai __pci_bus_assign_resources(b, realloc_head, fail_head); 10411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds switch (dev->class >> 8) { 10431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case PCI_CLASS_BRIDGE_PCI: 10446841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu if (!pci_is_enabled(dev)) 10456841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu pci_setup_bridge(b); 10461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 10471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case PCI_CLASS_BRIDGE_CARDBUS: 10491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_setup_cardbus(b); 10501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 10511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds default: 105380ccba1186d48fa728dc4b1456cc07ffb07da501Bjorn Helgaas dev_info(&dev->dev, "not setting up bridge for bus " 105480ccba1186d48fa728dc4b1456cc07ffb07da501Bjorn Helgaas "%04x:%02x\n", pci_domain_nr(b), b->number); 10551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 10561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 10571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 10581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 1059568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu 1060568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Luvoid __ref pci_bus_assign_resources(const struct pci_bus *bus) 1061568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu{ 1062c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai __pci_bus_assign_resources(bus, NULL, NULL); 1063568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu} 10641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL(pci_bus_assign_resources); 10651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10666841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lustatic void __ref __pci_bridge_assign_resources(const struct pci_dev *bridge, 10678424d7592eab8245b51051ee458e598213bca3b2Yinghai Lu struct resource_list_x *add_head, 10686841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu struct resource_list_x *fail_head) 10696841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu{ 10706841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu struct pci_bus *b; 10716841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu 10728424d7592eab8245b51051ee458e598213bca3b2Yinghai Lu pdev_assign_resources_sorted((struct pci_dev *)bridge, 10738424d7592eab8245b51051ee458e598213bca3b2Yinghai Lu add_head, fail_head); 10746841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu 10756841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu b = bridge->subordinate; 10766841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu if (!b) 10776841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu return; 10786841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu 10798424d7592eab8245b51051ee458e598213bca3b2Yinghai Lu __pci_bus_assign_resources(b, add_head, fail_head); 10806841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu 10816841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu switch (bridge->class >> 8) { 10826841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu case PCI_CLASS_BRIDGE_PCI: 10836841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu pci_setup_bridge(b); 10846841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu break; 10856841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu 10866841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu case PCI_CLASS_BRIDGE_CARDBUS: 10876841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu pci_setup_cardbus(b); 10886841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu break; 10896841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu 10906841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu default: 10916841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu dev_info(&bridge->dev, "not setting up bridge for bus " 10926841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu "%04x:%02x\n", pci_domain_nr(b), b->number); 10936841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu break; 10946841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu } 10956841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu} 10965009b46025acb2d3955d2c93574604fba667ef39Yinghai Lustatic void pci_bridge_release_resources(struct pci_bus *bus, 10975009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu unsigned long type) 10985009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu{ 10995009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu int idx; 11005009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu bool changed = false; 11015009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu struct pci_dev *dev; 11025009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu struct resource *r; 11035009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu unsigned long type_mask = IORESOURCE_IO | IORESOURCE_MEM | 11045009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu IORESOURCE_PREFETCH; 11055009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu 11065009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu dev = bus->self; 11075009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu for (idx = PCI_BRIDGE_RESOURCES; idx <= PCI_BRIDGE_RESOURCE_END; 11085009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu idx++) { 11095009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu r = &dev->resource[idx]; 11105009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu if ((r->flags & type_mask) != type) 11115009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu continue; 11125009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu if (!r->parent) 11135009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu continue; 11145009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu /* 11155009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu * if there are children under that, we should release them 11165009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu * all 11175009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu */ 11185009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu release_child_resources(r); 11195009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu if (!release_resource(r)) { 11205009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu dev_printk(KERN_DEBUG, &dev->dev, 11215009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu "resource %d %pR released\n", idx, r); 11225009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu /* keep the old size */ 11235009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu r->end = resource_size(r) - 1; 11245009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu r->start = 0; 11255009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu r->flags = 0; 11265009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu changed = true; 11275009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu } 11285009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu } 11295009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu 11305009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu if (changed) { 11315009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu /* avoiding touch the one without PREF */ 11325009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu if (type & IORESOURCE_PREFETCH) 11335009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu type = IORESOURCE_PREFETCH; 11345009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu __pci_setup_bridge(bus, type); 11355009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu } 11365009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu} 11375009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu 11385009b46025acb2d3955d2c93574604fba667ef39Yinghai Luenum release_type { 11395009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu leaf_only, 11405009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu whole_subtree, 11415009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu}; 11425009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu/* 11435009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu * try to release pci bridge resources that is from leaf bridge, 11445009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu * so we can allocate big new one later 11455009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu */ 11465009b46025acb2d3955d2c93574604fba667ef39Yinghai Lustatic void __ref pci_bus_release_bridge_resources(struct pci_bus *bus, 11475009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu unsigned long type, 11485009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu enum release_type rel_type) 11495009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu{ 11505009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu struct pci_dev *dev; 11515009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu bool is_leaf_bridge = true; 11525009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu 11535009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu list_for_each_entry(dev, &bus->devices, bus_list) { 11545009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu struct pci_bus *b = dev->subordinate; 11555009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu if (!b) 11565009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu continue; 11575009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu 11585009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu is_leaf_bridge = false; 11595009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu 11605009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu if ((dev->class >> 8) != PCI_CLASS_BRIDGE_PCI) 11615009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu continue; 11625009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu 11635009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu if (rel_type == whole_subtree) 11645009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu pci_bus_release_bridge_resources(b, type, 11655009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu whole_subtree); 11665009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu } 11675009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu 11685009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu if (pci_is_root_bus(bus)) 11695009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu return; 11705009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu 11715009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu if ((bus->self->class >> 8) != PCI_CLASS_BRIDGE_PCI) 11725009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu return; 11735009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu 11745009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu if ((rel_type == whole_subtree) || is_leaf_bridge) 11755009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu pci_bridge_release_resources(bus, type); 11765009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu} 11775009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu 117876fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lustatic void pci_bus_dump_res(struct pci_bus *bus) 117976fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lu{ 118089a74ecccd1f78e51faf6287e5c0e93a92ac096eBjorn Helgaas struct resource *res; 118189a74ecccd1f78e51faf6287e5c0e93a92ac096eBjorn Helgaas int i; 11827c9342b8dd1a32386fc32bffb9eedebbfe264763Yinghai Lu 118389a74ecccd1f78e51faf6287e5c0e93a92ac096eBjorn Helgaas pci_bus_for_each_resource(bus, res, i) { 11847c9342b8dd1a32386fc32bffb9eedebbfe264763Yinghai Lu if (!res || !res->end || !res->flags) 118576fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lu continue; 118676fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lu 1187c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas dev_printk(KERN_DEBUG, &bus->dev, "resource %d %pR\n", i, res); 118876fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lu } 118976fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lu} 119076fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lu 119176fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lustatic void pci_bus_dump_resources(struct pci_bus *bus) 119276fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lu{ 119376fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lu struct pci_bus *b; 119476fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lu struct pci_dev *dev; 119576fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lu 119676fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lu 119776fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lu pci_bus_dump_res(bus); 119876fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lu 119976fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lu list_for_each_entry(dev, &bus->devices, bus_list) { 120076fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lu b = dev->subordinate; 120176fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lu if (!b) 120276fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lu continue; 120376fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lu 120476fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lu pci_bus_dump_resources(b); 120576fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lu } 120676fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lu} 120776fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lu 1208da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lustatic int __init pci_bus_get_depth(struct pci_bus *bus) 1209da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu{ 1210da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu int depth = 0; 1211da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu struct pci_dev *dev; 1212da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu 1213da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu list_for_each_entry(dev, &bus->devices, bus_list) { 1214da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu int ret; 1215da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu struct pci_bus *b = dev->subordinate; 1216da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu if (!b) 1217da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu continue; 1218da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu 1219da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu ret = pci_bus_get_depth(b); 1220da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu if (ret + 1 > depth) 1221da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu depth = ret + 1; 1222da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu } 1223da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu 1224da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu return depth; 1225da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu} 1226da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lustatic int __init pci_get_max_depth(void) 1227da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu{ 1228da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu int depth = 0; 1229da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu struct pci_bus *bus; 1230da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu 1231da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu list_for_each_entry(bus, &pci_root_buses, node) { 1232da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu int ret; 1233da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu 1234da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu ret = pci_bus_get_depth(bus); 1235da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu if (ret > depth) 1236da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu depth = ret; 1237da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu } 1238da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu 1239da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu return depth; 1240da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu} 1241da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu 1242f483d3923dc3a6394c483e28ccb3fe700bdf399eRam Pai 1243da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu/* 1244da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu * first try will not touch pci bridge res 1245da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu * second and later try will clear small leaf bridge res 1246da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu * will stop till to the max deepth if can not find good one 1247da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu */ 12481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid __init 12491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldspci_assign_unassigned_resources(void) 12501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 12511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct pci_bus *bus; 12529e8bf93a7f416a3fa8fb6d76177d90e67bd45496Ram Pai struct resource_list_x realloc_list; /* list of resources that 1253c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai want additional resources */ 125419aa7ee432cec00b647443719eb5c055b69a5e8eYinghai Lu struct resource_list_x *add_list = NULL; 1255da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu int tried_times = 0; 1256da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu enum release_type rel_type = leaf_only; 1257da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu struct resource_list_x head, *list; 1258da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu unsigned long type_mask = IORESOURCE_IO | IORESOURCE_MEM | 1259da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu IORESOURCE_PREFETCH; 1260da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu unsigned long failed_type; 126119aa7ee432cec00b647443719eb5c055b69a5e8eYinghai Lu int pci_try_num = 1; 1262da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu 1263da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu head.next = NULL; 12649e8bf93a7f416a3fa8fb6d76177d90e67bd45496Ram Pai realloc_list.next = NULL; 1265da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu 126619aa7ee432cec00b647443719eb5c055b69a5e8eYinghai Lu /* don't realloc if asked to do so */ 126719aa7ee432cec00b647443719eb5c055b69a5e8eYinghai Lu if (pci_realloc_enabled()) { 126819aa7ee432cec00b647443719eb5c055b69a5e8eYinghai Lu int max_depth = pci_get_max_depth(); 126919aa7ee432cec00b647443719eb5c055b69a5e8eYinghai Lu 127019aa7ee432cec00b647443719eb5c055b69a5e8eYinghai Lu pci_try_num = max_depth + 1; 127119aa7ee432cec00b647443719eb5c055b69a5e8eYinghai Lu printk(KERN_DEBUG "PCI: max bus depth: %d pci_try_num: %d\n", 127219aa7ee432cec00b647443719eb5c055b69a5e8eYinghai Lu max_depth, pci_try_num); 127319aa7ee432cec00b647443719eb5c055b69a5e8eYinghai Lu } 1274da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu 1275da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Luagain: 127619aa7ee432cec00b647443719eb5c055b69a5e8eYinghai Lu /* 127719aa7ee432cec00b647443719eb5c055b69a5e8eYinghai Lu * last try will use add_list, otherwise will try good to have as 127819aa7ee432cec00b647443719eb5c055b69a5e8eYinghai Lu * must have, so can realloc parent bridge resource 127919aa7ee432cec00b647443719eb5c055b69a5e8eYinghai Lu */ 128019aa7ee432cec00b647443719eb5c055b69a5e8eYinghai Lu if (tried_times + 1 == pci_try_num) 128119aa7ee432cec00b647443719eb5c055b69a5e8eYinghai Lu add_list = &realloc_list; 12821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Depth first, calculate sizes and alignments of all 12831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds subordinate buses. */ 1284da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu list_for_each_entry(bus, &pci_root_buses, node) 128519aa7ee432cec00b647443719eb5c055b69a5e8eYinghai Lu __pci_bus_size_bridges(bus, add_list); 1286c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai 12871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Depth last, allocate resources and update the hardware. */ 1288da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu list_for_each_entry(bus, &pci_root_buses, node) 128919aa7ee432cec00b647443719eb5c055b69a5e8eYinghai Lu __pci_bus_assign_resources(bus, add_list, &head); 129019aa7ee432cec00b647443719eb5c055b69a5e8eYinghai Lu if (add_list) 129119aa7ee432cec00b647443719eb5c055b69a5e8eYinghai Lu BUG_ON(add_list->next); 1292da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu tried_times++; 1293da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu 1294da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu /* any device complain? */ 1295da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu if (!head.next) 1296da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu goto enable_and_dump; 1297f483d3923dc3a6394c483e28ccb3fe700bdf399eRam Pai 1298da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu failed_type = 0; 1299da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu for (list = head.next; list;) { 1300da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu failed_type |= list->flags; 1301da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu list = list->next; 1302da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu } 1303da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu /* 1304da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu * io port are tight, don't try extra 1305da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu * or if reach the limit, don't want to try more 1306da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu */ 1307da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu failed_type &= type_mask; 1308da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu if ((failed_type == IORESOURCE_IO) || (tried_times >= pci_try_num)) { 1309da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu free_list(resource_list_x, &head); 1310da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu goto enable_and_dump; 1311da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu } 1312da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu 1313da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu printk(KERN_DEBUG "PCI: No. %d try to assign unassigned res\n", 1314da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu tried_times + 1); 1315da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu 1316da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu /* third times and later will not check if it is leaf */ 1317da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu if ((tried_times + 1) > 2) 1318da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu rel_type = whole_subtree; 1319da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu 1320da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu /* 1321da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu * Try to release leaf bridge's resources that doesn't fit resource of 1322da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu * child device under that bridge 1323da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu */ 1324da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu for (list = head.next; list;) { 1325da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu bus = list->dev->bus; 1326da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu pci_bus_release_bridge_resources(bus, list->flags & type_mask, 1327da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu rel_type); 1328da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu list = list->next; 1329da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu } 1330da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu /* restore size and flags */ 1331da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu for (list = head.next; list;) { 1332da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu struct resource *res = list->res; 1333da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu 1334da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu res->start = list->start; 1335da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu res->end = list->end; 1336da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu res->flags = list->flags; 1337da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu if (list->dev->subordinate) 1338da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu res->flags = 0; 1339da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu 1340da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu list = list->next; 1341da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu } 1342da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu free_list(resource_list_x, &head); 1343da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu 1344da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu goto again; 1345da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu 1346da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Luenable_and_dump: 1347da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu /* Depth last, update the hardware. */ 1348da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu list_for_each_entry(bus, &pci_root_buses, node) 1349da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu pci_enable_bridges(bus); 135076fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lu 135176fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lu /* dump the resource on buses */ 1352da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu list_for_each_entry(bus, &pci_root_buses, node) 135376fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lu pci_bus_dump_resources(bus); 13541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 13556841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu 13566841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Luvoid pci_assign_unassigned_bridge_resources(struct pci_dev *bridge) 13576841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu{ 13586841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu struct pci_bus *parent = bridge->subordinate; 13598424d7592eab8245b51051ee458e598213bca3b2Yinghai Lu struct resource_list_x add_list; /* list of resources that 13608424d7592eab8245b51051ee458e598213bca3b2Yinghai Lu want additional resources */ 136132180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu int tried_times = 0; 136232180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu struct resource_list_x head, *list; 13636841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu int retval; 136432180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu unsigned long type_mask = IORESOURCE_IO | IORESOURCE_MEM | 136532180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu IORESOURCE_PREFETCH; 136632180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu 136732180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu head.next = NULL; 13688424d7592eab8245b51051ee458e598213bca3b2Yinghai Lu add_list.next = NULL; 13696841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu 137032180e402f9ff1f3389c99edf3f393425e706080Yinghai Luagain: 13718424d7592eab8245b51051ee458e598213bca3b2Yinghai Lu __pci_bus_size_bridges(parent, &add_list); 13728424d7592eab8245b51051ee458e598213bca3b2Yinghai Lu __pci_bridge_assign_resources(bridge, &add_list, &head); 13738424d7592eab8245b51051ee458e598213bca3b2Yinghai Lu BUG_ON(add_list.next); 137432180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu tried_times++; 137532180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu 137632180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu if (!head.next) 13773f579c340fe6d6bdd8c6f9f144e7c3b85d4174ecYinghai Lu goto enable_all; 137832180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu 137932180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu if (tried_times >= 2) { 138032180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu /* still fail, don't need to try more */ 1381094732a520caae81ae1532af29da82a4fa953472Ram Pai free_list(resource_list_x, &head); 13823f579c340fe6d6bdd8c6f9f144e7c3b85d4174ecYinghai Lu goto enable_all; 138332180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu } 138432180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu 138532180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu printk(KERN_DEBUG "PCI: No. %d try to assign unassigned res\n", 138632180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu tried_times + 1); 138732180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu 138832180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu /* 138932180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu * Try to release leaf bridge's resources that doesn't fit resource of 139032180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu * child device under that bridge 139132180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu */ 139232180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu for (list = head.next; list;) { 139332180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu struct pci_bus *bus = list->dev->bus; 139432180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu unsigned long flags = list->flags; 139532180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu 139632180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu pci_bus_release_bridge_resources(bus, flags & type_mask, 139732180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu whole_subtree); 139832180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu list = list->next; 139932180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu } 140032180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu /* restore size and flags */ 140132180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu for (list = head.next; list;) { 140232180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu struct resource *res = list->res; 140332180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu 140432180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu res->start = list->start; 140532180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu res->end = list->end; 140632180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu res->flags = list->flags; 140732180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu if (list->dev->subordinate) 140832180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu res->flags = 0; 140932180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu 141032180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu list = list->next; 141132180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu } 1412094732a520caae81ae1532af29da82a4fa953472Ram Pai free_list(resource_list_x, &head); 141332180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu 141432180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu goto again; 14153f579c340fe6d6bdd8c6f9f144e7c3b85d4174ecYinghai Lu 14163f579c340fe6d6bdd8c6f9f144e7c3b85d4174ecYinghai Luenable_all: 14173f579c340fe6d6bdd8c6f9f144e7c3b85d4174ecYinghai Lu retval = pci_reenable_device(bridge); 14183f579c340fe6d6bdd8c6f9f144e7c3b85d4174ecYinghai Lu pci_set_master(bridge); 14193f579c340fe6d6bdd8c6f9f144e7c3b85d4174ecYinghai Lu pci_enable_bridges(parent); 14206841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu} 14216841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai LuEXPORT_SYMBOL_GPL(pci_assign_unassigned_bridge_resources); 14229b03088f955552299f50a1f660372698b07ab339Yinghai Lu 14239b03088f955552299f50a1f660372698b07ab339Yinghai Lu#ifdef CONFIG_HOTPLUG 14249b03088f955552299f50a1f660372698b07ab339Yinghai Lu/** 14259b03088f955552299f50a1f660372698b07ab339Yinghai Lu * pci_rescan_bus - scan a PCI bus for devices. 14269b03088f955552299f50a1f660372698b07ab339Yinghai Lu * @bus: PCI bus to scan 14279b03088f955552299f50a1f660372698b07ab339Yinghai Lu * 14289b03088f955552299f50a1f660372698b07ab339Yinghai Lu * Scan a PCI bus and child buses for new devices, adds them, 14299b03088f955552299f50a1f660372698b07ab339Yinghai Lu * and enables them. 14309b03088f955552299f50a1f660372698b07ab339Yinghai Lu * 14319b03088f955552299f50a1f660372698b07ab339Yinghai Lu * Returns the max number of subordinate bus discovered. 14329b03088f955552299f50a1f660372698b07ab339Yinghai Lu */ 14339b03088f955552299f50a1f660372698b07ab339Yinghai Luunsigned int __ref pci_rescan_bus(struct pci_bus *bus) 14349b03088f955552299f50a1f660372698b07ab339Yinghai Lu{ 14359b03088f955552299f50a1f660372698b07ab339Yinghai Lu unsigned int max; 14369b03088f955552299f50a1f660372698b07ab339Yinghai Lu struct pci_dev *dev; 14379b03088f955552299f50a1f660372698b07ab339Yinghai Lu struct resource_list_x add_list; /* list of resources that 14389b03088f955552299f50a1f660372698b07ab339Yinghai Lu want additional resources */ 14399b03088f955552299f50a1f660372698b07ab339Yinghai Lu 14409b03088f955552299f50a1f660372698b07ab339Yinghai Lu max = pci_scan_child_bus(bus); 14419b03088f955552299f50a1f660372698b07ab339Yinghai Lu 14429b03088f955552299f50a1f660372698b07ab339Yinghai Lu add_list.next = NULL; 14439b03088f955552299f50a1f660372698b07ab339Yinghai Lu down_read(&pci_bus_sem); 14449b03088f955552299f50a1f660372698b07ab339Yinghai Lu list_for_each_entry(dev, &bus->devices, bus_list) 14459b03088f955552299f50a1f660372698b07ab339Yinghai Lu if (dev->hdr_type == PCI_HEADER_TYPE_BRIDGE || 14469b03088f955552299f50a1f660372698b07ab339Yinghai Lu dev->hdr_type == PCI_HEADER_TYPE_CARDBUS) 14479b03088f955552299f50a1f660372698b07ab339Yinghai Lu if (dev->subordinate) 14489b03088f955552299f50a1f660372698b07ab339Yinghai Lu __pci_bus_size_bridges(dev->subordinate, 14499b03088f955552299f50a1f660372698b07ab339Yinghai Lu &add_list); 14509b03088f955552299f50a1f660372698b07ab339Yinghai Lu up_read(&pci_bus_sem); 14519b03088f955552299f50a1f660372698b07ab339Yinghai Lu __pci_bus_assign_resources(bus, &add_list, NULL); 14529b03088f955552299f50a1f660372698b07ab339Yinghai Lu BUG_ON(add_list.next); 14539b03088f955552299f50a1f660372698b07ab339Yinghai Lu 14549b03088f955552299f50a1f660372698b07ab339Yinghai Lu pci_enable_bridges(bus); 14559b03088f955552299f50a1f660372698b07ab339Yinghai Lu pci_bus_add_devices(bus); 14569b03088f955552299f50a1f660372698b07ab339Yinghai Lu 14579b03088f955552299f50a1f660372698b07ab339Yinghai Lu return max; 14589b03088f955552299f50a1f660372698b07ab339Yinghai Lu} 14599b03088f955552299f50a1f660372698b07ab339Yinghai LuEXPORT_SYMBOL_GPL(pci_rescan_bus); 14609b03088f955552299f50a1f660372698b07ab339Yinghai Lu#endif 1461