setup-bus.c revision 8424d7592eab8245b51051ee458e598213bca3b2
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 30568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lustruct resource_list_x { 31568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu struct resource_list_x *next; 32568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu struct resource *res; 33568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu struct pci_dev *dev; 34568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu resource_size_t start; 35568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu resource_size_t end; 36c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai resource_size_t add_size; 372bbc6942273b5b3097bd265d82227bdd84b351b2Ram Pai resource_size_t min_align; 38568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu unsigned long flags; 39568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu}; 40568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu 41094732a520caae81ae1532af29da82a4fa953472Ram Pai#define free_list(type, head) do { \ 42094732a520caae81ae1532af29da82a4fa953472Ram Pai struct type *list, *tmp; \ 43094732a520caae81ae1532af29da82a4fa953472Ram Pai for (list = (head)->next; list;) { \ 44094732a520caae81ae1532af29da82a4fa953472Ram Pai tmp = list; \ 45094732a520caae81ae1532af29da82a4fa953472Ram Pai list = list->next; \ 46094732a520caae81ae1532af29da82a4fa953472Ram Pai kfree(tmp); \ 47094732a520caae81ae1532af29da82a4fa953472Ram Pai } \ 48094732a520caae81ae1532af29da82a4fa953472Ram Pai (head)->next = NULL; \ 49094732a520caae81ae1532af29da82a4fa953472Ram Pai} while (0) 50094732a520caae81ae1532af29da82a4fa953472Ram Pai 51f483d3923dc3a6394c483e28ccb3fe700bdf399eRam Paiint pci_realloc_enable = 0; 52f483d3923dc3a6394c483e28ccb3fe700bdf399eRam Pai#define pci_realloc_enabled() pci_realloc_enable 53f483d3923dc3a6394c483e28ccb3fe700bdf399eRam Paivoid pci_realloc(void) 54f483d3923dc3a6394c483e28ccb3fe700bdf399eRam Pai{ 55f483d3923dc3a6394c483e28ccb3fe700bdf399eRam Pai pci_realloc_enable = 1; 56f483d3923dc3a6394c483e28ccb3fe700bdf399eRam Pai} 57f483d3923dc3a6394c483e28ccb3fe700bdf399eRam Pai 58c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai/** 59c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * add_to_list() - add a new resource tracker to the list 60c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * @head: Head of the list 61c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * @dev: device corresponding to which the resource 62c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * belongs 63c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * @res: The resource to be tracked 64c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * @add_size: additional size to be optionally added 65c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * to the resource 66c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai */ 67ef62dfefa93bc90f1cb0f4a55c2d86b3269b3f92Yinghai Lustatic int add_to_list(struct resource_list_x *head, 68c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai struct pci_dev *dev, struct resource *res, 692bbc6942273b5b3097bd265d82227bdd84b351b2Ram Pai resource_size_t add_size, resource_size_t min_align) 70568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu{ 71568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu struct resource_list_x *list = head; 72568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu struct resource_list_x *ln = list->next; 73568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu struct resource_list_x *tmp; 74568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu 75568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu tmp = kmalloc(sizeof(*tmp), GFP_KERNEL); 76568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu if (!tmp) { 77c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai pr_warning("add_to_list: kmalloc() failed!\n"); 78ef62dfefa93bc90f1cb0f4a55c2d86b3269b3f92Yinghai Lu return -ENOMEM; 79568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu } 80568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu 81568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu tmp->next = ln; 82568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu tmp->res = res; 83568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu tmp->dev = dev; 84568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu tmp->start = res->start; 85568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu tmp->end = res->end; 86568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu tmp->flags = res->flags; 87c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai tmp->add_size = add_size; 882bbc6942273b5b3097bd265d82227bdd84b351b2Ram Pai tmp->min_align = min_align; 89568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu list->next = tmp; 90ef62dfefa93bc90f1cb0f4a55c2d86b3269b3f92Yinghai Lu 91ef62dfefa93bc90f1cb0f4a55c2d86b3269b3f92Yinghai Lu return 0; 92568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu} 93568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu 94c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Paistatic void add_to_failed_list(struct resource_list_x *head, 95c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai struct pci_dev *dev, struct resource *res) 96c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai{ 972bbc6942273b5b3097bd265d82227bdd84b351b2Ram Pai add_to_list(head, dev, res, 982bbc6942273b5b3097bd265d82227bdd84b351b2Ram Pai 0 /* dont care */, 992bbc6942273b5b3097bd265d82227bdd84b351b2Ram Pai 0 /* dont care */); 100c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai} 101c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai 1023e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lustatic void remove_from_list(struct resource_list_x *realloc_head, 1033e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu struct resource *res) 1043e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu{ 1053e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu struct resource_list_x *prev, *tmp, *list; 1063e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu 1073e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu prev = realloc_head; 1083e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu for (list = realloc_head->next; list;) { 1093e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu if (list->res != res) { 1103e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu prev = list; 1113e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu list = list->next; 1123e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu continue; 1133e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu } 1143e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu tmp = list; 1153e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu prev->next = list = list->next; 1163e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu kfree(tmp); 1173e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu } 1183e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu} 1193e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu 1201c372353e9c681b127f21030f8a0f0c2afd82429Yinghai Lustatic resource_size_t get_res_add_size(struct resource_list_x *realloc_head, 1211c372353e9c681b127f21030f8a0f0c2afd82429Yinghai Lu struct resource *res) 1221c372353e9c681b127f21030f8a0f0c2afd82429Yinghai Lu{ 1231c372353e9c681b127f21030f8a0f0c2afd82429Yinghai Lu struct resource_list_x *list; 1241c372353e9c681b127f21030f8a0f0c2afd82429Yinghai Lu 1251c372353e9c681b127f21030f8a0f0c2afd82429Yinghai Lu /* check if it is in realloc_head list */ 1261c372353e9c681b127f21030f8a0f0c2afd82429Yinghai Lu for (list = realloc_head->next; list && list->res != res; 1271c372353e9c681b127f21030f8a0f0c2afd82429Yinghai Lu list = list->next) 1281c372353e9c681b127f21030f8a0f0c2afd82429Yinghai Lu ; 1293e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu 1303e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu if (list) { 1313e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu dev_printk(KERN_DEBUG, &list->dev->dev, 1323e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu "%pR get_res_add_size add_size %llx\n", 1333e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu list->res, (unsigned long long)list->add_size); 1341c372353e9c681b127f21030f8a0f0c2afd82429Yinghai Lu return list->add_size; 1353e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu } 1361c372353e9c681b127f21030f8a0f0c2afd82429Yinghai Lu 1371c372353e9c681b127f21030f8a0f0c2afd82429Yinghai Lu return 0; 1381c372353e9c681b127f21030f8a0f0c2afd82429Yinghai Lu} 1391c372353e9c681b127f21030f8a0f0c2afd82429Yinghai Lu 1406841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lustatic void __dev_sort_resources(struct pci_dev *dev, 1416841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu struct resource_list *head) 1421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1436841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu u16 class = dev->class >> 8; 1441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1456841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu /* Don't touch classless devices or host bridges or ioapics. */ 1466841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu if (class == PCI_CLASS_NOT_DEFINED || class == PCI_CLASS_BRIDGE_HOST) 1476841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu return; 1481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1496841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu /* Don't touch ioapic devices already enabled by firmware */ 1506841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu if (class == PCI_CLASS_SYSTEM_PIC) { 1516841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu u16 command; 1526841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu pci_read_config_word(dev, PCI_COMMAND, &command); 1536841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu if (command & (PCI_COMMAND_IO | PCI_COMMAND_MEMORY)) 1546841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu return; 1556841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu } 1561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1576841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu pdev_sort_resources(dev, head); 1586841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu} 15923186279658cea6d42a050400d3e79c56cb459b4Satoru Takeuchi 160fc075e1da1b96ef65c32e83648055606b8204b58Ram Paistatic inline void reset_resource(struct resource *res) 161fc075e1da1b96ef65c32e83648055606b8204b58Ram Pai{ 162fc075e1da1b96ef65c32e83648055606b8204b58Ram Pai res->start = 0; 163fc075e1da1b96ef65c32e83648055606b8204b58Ram Pai res->end = 0; 164fc075e1da1b96ef65c32e83648055606b8204b58Ram Pai res->flags = 0; 165fc075e1da1b96ef65c32e83648055606b8204b58Ram Pai} 166fc075e1da1b96ef65c32e83648055606b8204b58Ram Pai 167c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai/** 1689e8bf93a7f416a3fa8fb6d76177d90e67bd45496Ram Pai * reassign_resources_sorted() - satisfy any additional resource requests 169c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * 1709e8bf93a7f416a3fa8fb6d76177d90e67bd45496Ram Pai * @realloc_head : head of the list tracking requests requiring additional 171c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * resources 172c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * @head : head of the list tracking requests with allocated 173c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * resources 174c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * 1759e8bf93a7f416a3fa8fb6d76177d90e67bd45496Ram Pai * Walk through each element of the realloc_head and try to procure 176c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * additional resources for the element, provided the element 177c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * is in the head list. 178c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai */ 1799e8bf93a7f416a3fa8fb6d76177d90e67bd45496Ram Paistatic void reassign_resources_sorted(struct resource_list_x *realloc_head, 180c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai struct resource_list *head) 1816841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu{ 1826841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu struct resource *res; 183c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai struct resource_list_x *list, *tmp, *prev; 184c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai struct resource_list *hlist; 185c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai resource_size_t add_size; 1866841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu int idx; 1871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1889e8bf93a7f416a3fa8fb6d76177d90e67bd45496Ram Pai prev = realloc_head; 1899e8bf93a7f416a3fa8fb6d76177d90e67bd45496Ram Pai for (list = realloc_head->next; list;) { 1901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds res = list->res; 191c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai /* skip resource that has been reset */ 192c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai if (!res->flags) 193c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai goto out; 194c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai 195c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai /* skip this resource if not found in head list */ 196c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai for (hlist = head->next; hlist && hlist->res != res; 197c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai hlist = hlist->next); 198c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai if (!hlist) { /* just skip */ 199c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai prev = list; 200c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai list = list->next; 201c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai continue; 202c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai } 203c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai 2041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds idx = res - &list->dev->resource[0]; 205c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai add_size=list->add_size; 2062bbc6942273b5b3097bd265d82227bdd84b351b2Ram Pai if (!resource_size(res)) { 2070a2daa1cf35004f5adbf4138555cc5669abf3a3eRam Pai res->start = list->start; 2082bbc6942273b5b3097bd265d82227bdd84b351b2Ram Pai res->end = res->start + add_size - 1; 2092bbc6942273b5b3097bd265d82227bdd84b351b2Ram Pai if(pci_assign_resource(list->dev, idx)) 210c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai reset_resource(res); 2112bbc6942273b5b3097bd265d82227bdd84b351b2Ram Pai } else { 2122bbc6942273b5b3097bd265d82227bdd84b351b2Ram Pai resource_size_t align = list->min_align; 2132bbc6942273b5b3097bd265d82227bdd84b351b2Ram Pai res->flags |= list->flags & (IORESOURCE_STARTALIGN|IORESOURCE_SIZEALIGN); 2142bbc6942273b5b3097bd265d82227bdd84b351b2Ram Pai if (pci_reassign_resource(list->dev, idx, add_size, align)) 2152bbc6942273b5b3097bd265d82227bdd84b351b2Ram Pai dev_printk(KERN_DEBUG, &list->dev->dev, "failed to add optional resources res=%pR\n", 2162bbc6942273b5b3097bd265d82227bdd84b351b2Ram Pai res); 217c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai } 218c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Paiout: 219c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai tmp = list; 220c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai prev->next = list = list->next; 221c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai kfree(tmp); 222c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai } 223c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai} 224c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai 225c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai/** 226c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * assign_requested_resources_sorted() - satisfy resource requests 227c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * 228c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * @head : head of the list tracking requests for resources 229c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * @failed_list : head of the list tracking requests that could 230c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * not be allocated 231c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * 232c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * Satisfy resource requests of each element in the list. Add 233c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * requests that could not satisfied to the failed_list. 234c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai */ 235c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Paistatic void assign_requested_resources_sorted(struct resource_list *head, 236c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai struct resource_list_x *fail_head) 237c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai{ 238c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai struct resource *res; 239c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai struct resource_list *list; 240c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai int idx; 2419a928660c9dcaff568c9d379655c5aa16fb981f8Yinghai Lu 242c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai for (list = head->next; list; list = list->next) { 243c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai res = list->res; 244c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai idx = res - &list->dev->resource[0]; 245c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai if (resource_size(res) && pci_assign_resource(list->dev, idx)) { 2469a928660c9dcaff568c9d379655c5aa16fb981f8Yinghai Lu if (fail_head && !pci_is_root_bus(list->dev->bus)) { 2479a928660c9dcaff568c9d379655c5aa16fb981f8Yinghai Lu /* 2489a928660c9dcaff568c9d379655c5aa16fb981f8Yinghai Lu * if the failed res is for ROM BAR, and it will 2499a928660c9dcaff568c9d379655c5aa16fb981f8Yinghai Lu * be enabled later, don't add it to the list 2509a928660c9dcaff568c9d379655c5aa16fb981f8Yinghai Lu */ 2519a928660c9dcaff568c9d379655c5aa16fb981f8Yinghai Lu if (!((idx == PCI_ROM_RESOURCE) && 2529a928660c9dcaff568c9d379655c5aa16fb981f8Yinghai Lu (!(res->flags & IORESOURCE_ROM_ENABLE)))) 2539a928660c9dcaff568c9d379655c5aa16fb981f8Yinghai Lu add_to_failed_list(fail_head, list->dev, res); 2549a928660c9dcaff568c9d379655c5aa16fb981f8Yinghai Lu } 255fc075e1da1b96ef65c32e83648055606b8204b58Ram Pai reset_resource(res); 256542df5de56a23bf2d94b75e2b304ab0e5a5508a8Rajesh Shah } 2571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 2581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 2591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 260c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Paistatic void __assign_resources_sorted(struct resource_list *head, 2619e8bf93a7f416a3fa8fb6d76177d90e67bd45496Ram Pai struct resource_list_x *realloc_head, 262c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai struct resource_list_x *fail_head) 263c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai{ 2643e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu /* 2653e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu * Should not assign requested resources at first. 2663e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu * they could be adjacent, so later reassign can not reallocate 2673e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu * them one by one in parent resource window. 2683e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu * Try to assign requested + add_size at begining 2693e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu * if could do that, could get out early. 2703e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu * if could not do that, we still try to assign requested at first, 2713e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu * then try to reassign add_size for some resources. 2723e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu */ 2733e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu struct resource_list_x save_head, local_fail_head, *list; 2743e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu struct resource_list *l; 2753e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu 2763e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu /* Check if optional add_size is there */ 2773e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu if (!realloc_head || !realloc_head->next) 2783e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu goto requested_and_reassign; 2793e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu 2803e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu /* Save original start, end, flags etc at first */ 2813e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu save_head.next = NULL; 2823e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu for (l = head->next; l; l = l->next) 2833e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu if (add_to_list(&save_head, l->dev, l->res, 0, 0)) { 2843e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu free_list(resource_list_x, &save_head); 2853e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu goto requested_and_reassign; 2863e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu } 2873e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu 2883e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu /* Update res in head list with add_size in realloc_head list */ 2893e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu for (l = head->next; l; l = l->next) 2903e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu l->res->end += get_res_add_size(realloc_head, l->res); 2913e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu 2923e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu /* Try updated head list with add_size added */ 2933e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu local_fail_head.next = NULL; 2943e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu assign_requested_resources_sorted(head, &local_fail_head); 2953e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu 2963e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu /* all assigned with add_size ? */ 2973e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu if (!local_fail_head.next) { 2983e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu /* Remove head list from realloc_head list */ 2993e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu for (l = head->next; l; l = l->next) 3003e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu remove_from_list(realloc_head, l->res); 3013e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu free_list(resource_list_x, &save_head); 3023e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu free_list(resource_list, head); 3033e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu return; 3043e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu } 3053e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu 3063e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu free_list(resource_list_x, &local_fail_head); 3073e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu /* Release assigned resource */ 3083e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu for (l = head->next; l; l = l->next) 3093e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu if (l->res->parent) 3103e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu release_resource(l->res); 3113e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu /* Restore start/end/flags from saved list */ 3123e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu for (list = save_head.next; list; list = list->next) { 3133e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu struct resource *res = list->res; 3143e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu 3153e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu res->start = list->start; 3163e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu res->end = list->end; 3173e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu res->flags = list->flags; 3183e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu } 3193e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu free_list(resource_list_x, &save_head); 3203e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lu 3213e6e0d80941773a6d0ac94354b083b74967f06fbYinghai Lurequested_and_reassign: 322c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai /* Satisfy the must-have resource requests */ 323c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai assign_requested_resources_sorted(head, fail_head); 324c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai 3250a2daa1cf35004f5adbf4138555cc5669abf3a3eRam Pai /* Try to satisfy any additional optional resource 326c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai requests */ 3279e8bf93a7f416a3fa8fb6d76177d90e67bd45496Ram Pai if (realloc_head) 3289e8bf93a7f416a3fa8fb6d76177d90e67bd45496Ram Pai reassign_resources_sorted(realloc_head, head); 329c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai free_list(resource_list, head); 330c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai} 331c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai 3326841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lustatic void pdev_assign_resources_sorted(struct pci_dev *dev, 3338424d7592eab8245b51051ee458e598213bca3b2Yinghai Lu struct resource_list_x *add_head, 3346841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu struct resource_list_x *fail_head) 3356841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu{ 3366841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu struct resource_list head; 3376841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu 3386841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu head.next = NULL; 3396841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu __dev_sort_resources(dev, &head); 3408424d7592eab8245b51051ee458e598213bca3b2Yinghai Lu __assign_resources_sorted(&head, add_head, fail_head); 3416841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu 3426841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu} 3436841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu 3446841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lustatic void pbus_assign_resources_sorted(const struct pci_bus *bus, 3459e8bf93a7f416a3fa8fb6d76177d90e67bd45496Ram Pai struct resource_list_x *realloc_head, 3466841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu struct resource_list_x *fail_head) 3476841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu{ 3486841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu struct pci_dev *dev; 3496841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu struct resource_list head; 3506841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu 3516841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu head.next = NULL; 3526841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu list_for_each_entry(dev, &bus->devices, bus_list) 3536841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu __dev_sort_resources(dev, &head); 3546841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu 3559e8bf93a7f416a3fa8fb6d76177d90e67bd45496Ram Pai __assign_resources_sorted(&head, realloc_head, fail_head); 3566841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu} 3576841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu 358b3743fa4442fc172e950ff0eaf6aa96e7d5ce9beDominik Brodowskivoid pci_setup_cardbus(struct pci_bus *bus) 3591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 3601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct pci_dev *bridge = bus->self; 361c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas struct resource *res; 3621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct pci_bus_region region; 3631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 364865df576e8fc70daf297b53e61a4fbefc719d065Bjorn Helgaas dev_info(&bridge->dev, "CardBus bridge to [bus %02x-%02x]\n", 365865df576e8fc70daf297b53e61a4fbefc719d065Bjorn Helgaas bus->secondary, bus->subordinate); 3661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 367c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas res = bus->resource[0]; 368c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas pcibios_resource_to_bus(bridge, ®ion, res); 369c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas if (res->flags & IORESOURCE_IO) { 3701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* 3711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * The IO resource is allocated a range twice as large as it 3721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * would normally need. This allows us to set both IO regs. 3731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 374c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas dev_info(&bridge->dev, " bridge window %pR\n", res); 3751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_write_config_dword(bridge, PCI_CB_IO_BASE_0, 3761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds region.start); 3771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_write_config_dword(bridge, PCI_CB_IO_LIMIT_0, 3781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds region.end); 3791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 3801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 381c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas res = bus->resource[1]; 382c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas pcibios_resource_to_bus(bridge, ®ion, res); 383c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas if (res->flags & IORESOURCE_IO) { 384c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas dev_info(&bridge->dev, " bridge window %pR\n", res); 3851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_write_config_dword(bridge, PCI_CB_IO_BASE_1, 3861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds region.start); 3871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_write_config_dword(bridge, PCI_CB_IO_LIMIT_1, 3881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds region.end); 3891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 3901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 391c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas res = bus->resource[2]; 392c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas pcibios_resource_to_bus(bridge, ®ion, res); 393c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas if (res->flags & IORESOURCE_MEM) { 394c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas dev_info(&bridge->dev, " bridge window %pR\n", res); 3951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_write_config_dword(bridge, PCI_CB_MEMORY_BASE_0, 3961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds region.start); 3971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_write_config_dword(bridge, PCI_CB_MEMORY_LIMIT_0, 3981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds region.end); 3991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 4001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 401c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas res = bus->resource[3]; 402c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas pcibios_resource_to_bus(bridge, ®ion, res); 403c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas if (res->flags & IORESOURCE_MEM) { 404c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas dev_info(&bridge->dev, " bridge window %pR\n", res); 4051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_write_config_dword(bridge, PCI_CB_MEMORY_BASE_1, 4061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds region.start); 4071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_write_config_dword(bridge, PCI_CB_MEMORY_LIMIT_1, 4081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds region.end); 4091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 4101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 411b3743fa4442fc172e950ff0eaf6aa96e7d5ce9beDominik BrodowskiEXPORT_SYMBOL(pci_setup_cardbus); 4121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* Initialize bridges with base/limit values we have collected. 4141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds PCI-to-PCI Bridge Architecture Specification rev. 1.1 (1998) 4151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds requires that if there is no I/O ports or memory behind the 4161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bridge, corresponding range must be turned off by writing base 4171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds value greater than limit to the bridge's base/limit registers. 4181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds Note: care must be taken when updating I/O base/limit registers 4201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds of bridges which support 32-bit I/O. This update requires two 4211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds config space writes, so it's quite possible that an I/O window of 4221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds the bridge will have some undesirable address (e.g. 0) after the 4231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds first write. Ditto 64-bit prefetchable MMIO. */ 4247cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lustatic void pci_setup_bridge_io(struct pci_bus *bus) 4251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 4261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct pci_dev *bridge = bus->self; 427c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas struct resource *res; 4281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct pci_bus_region region; 4297cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu u32 l, io_upper16; 4301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Set up the top and bottom of the PCI I/O segment for this bus. */ 432c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas res = bus->resource[0]; 433c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas pcibios_resource_to_bus(bridge, ®ion, res); 434c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas if (res->flags & IORESOURCE_IO) { 4351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_read_config_dword(bridge, PCI_IO_BASE, &l); 4361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds l &= 0xffff0000; 4371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds l |= (region.start >> 8) & 0x00f0; 4381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds l |= region.end & 0xf000; 4391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Set up upper 16 bits of I/O base/limit. */ 4401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds io_upper16 = (region.end & 0xffff0000) | (region.start >> 16); 441c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas dev_info(&bridge->dev, " bridge window %pR\n", res); 4427cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu } else { 4431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Clear upper 16 bits of I/O base/limit. */ 4441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds io_upper16 = 0; 4451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds l = 0x00f0; 4461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 4471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Temporarily disable the I/O range before updating PCI_IO_BASE. */ 4481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_write_config_dword(bridge, PCI_IO_BASE_UPPER16, 0x0000ffff); 4491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Update lower 16 bits of I/O base/limit. */ 4501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_write_config_dword(bridge, PCI_IO_BASE, l); 4511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Update upper 16 bits of I/O base/limit. */ 4521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_write_config_dword(bridge, PCI_IO_BASE_UPPER16, io_upper16); 4537cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu} 4547cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu 4557cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lustatic void pci_setup_bridge_mmio(struct pci_bus *bus) 4567cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu{ 4577cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu struct pci_dev *bridge = bus->self; 4587cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu struct resource *res; 4597cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu struct pci_bus_region region; 4607cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu u32 l; 4611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4627cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu /* Set up the top and bottom of the PCI Memory segment for this bus. */ 463c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas res = bus->resource[1]; 464c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas pcibios_resource_to_bus(bridge, ®ion, res); 465c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas if (res->flags & IORESOURCE_MEM) { 4661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds l = (region.start >> 16) & 0xfff0; 4671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds l |= region.end & 0xfff00000; 468c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas dev_info(&bridge->dev, " bridge window %pR\n", res); 4697cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu } else { 4701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds l = 0x0000fff0; 4711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 4721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_write_config_dword(bridge, PCI_MEMORY_BASE, l); 4737cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu} 4747cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu 4757cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lustatic void pci_setup_bridge_mmio_pref(struct pci_bus *bus) 4767cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu{ 4777cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu struct pci_dev *bridge = bus->self; 4787cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu struct resource *res; 4797cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu struct pci_bus_region region; 4807cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu u32 l, bu, lu; 4811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Clear out the upper 32 bits of PREF limit. 4831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds If PCI_PREF_BASE_UPPER32 was non-zero, this temporarily 4841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds disables PREF range, which is ok. */ 4851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_write_config_dword(bridge, PCI_PREF_LIMIT_UPPER32, 0); 4861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Set up PREF base/limit. */ 488c40a22e0ce5eb400f27449e59e43d021bee58b8dBenjamin Herrenschmidt bu = lu = 0; 489c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas res = bus->resource[2]; 490c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas pcibios_resource_to_bus(bridge, ®ion, res); 491c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas if (res->flags & IORESOURCE_PREFETCH) { 4921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds l = (region.start >> 16) & 0xfff0; 4931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds l |= region.end & 0xfff00000; 494c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas if (res->flags & IORESOURCE_MEM_64) { 4951f82de10d6b1d845155363c895c552e61b36b51aYinghai Lu bu = upper_32_bits(region.start); 4961f82de10d6b1d845155363c895c552e61b36b51aYinghai Lu lu = upper_32_bits(region.end); 4971f82de10d6b1d845155363c895c552e61b36b51aYinghai Lu } 498c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas dev_info(&bridge->dev, " bridge window %pR\n", res); 4997cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu } else { 5001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds l = 0x0000fff0; 5011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 5021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_write_config_dword(bridge, PCI_PREF_MEMORY_BASE, l); 5031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 50459353ea30e65ab3ae181d6175e3212e1361c3787Alex Williamson /* Set the upper 32 bits of PREF base & limit. */ 50559353ea30e65ab3ae181d6175e3212e1361c3787Alex Williamson pci_write_config_dword(bridge, PCI_PREF_BASE_UPPER32, bu); 50659353ea30e65ab3ae181d6175e3212e1361c3787Alex Williamson pci_write_config_dword(bridge, PCI_PREF_LIMIT_UPPER32, lu); 5077cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu} 5087cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu 5097cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lustatic void __pci_setup_bridge(struct pci_bus *bus, unsigned long type) 5107cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu{ 5117cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu struct pci_dev *bridge = bus->self; 5127cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu 5137cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu dev_info(&bridge->dev, "PCI bridge to [bus %02x-%02x]\n", 5147cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu bus->secondary, bus->subordinate); 5157cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu 5167cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu if (type & IORESOURCE_IO) 5177cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu pci_setup_bridge_io(bus); 5187cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu 5197cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu if (type & IORESOURCE_MEM) 5207cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu pci_setup_bridge_mmio(bus); 5217cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu 5227cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu if (type & IORESOURCE_PREFETCH) 5237cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu pci_setup_bridge_mmio_pref(bus); 5241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_write_config_word(bridge, PCI_BRIDGE_CONTROL, bus->bridge_ctl); 5261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 5271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 528e24442733ee486c99d03fe2ecd98924d1bc14c51Benjamin Herrenschmidtvoid pci_setup_bridge(struct pci_bus *bus) 5297cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu{ 5307cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu unsigned long type = IORESOURCE_IO | IORESOURCE_MEM | 5317cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu IORESOURCE_PREFETCH; 5327cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu 5337cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu __pci_setup_bridge(bus, type); 5347cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu} 5357cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu 5361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* Check whether the bridge supports optional I/O and 5371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds prefetchable memory ranges. If not, the respective 5381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds base/limit registers must be read-only and read as 0. */ 53996bde06a2df1b363206d3cdef53134b84ff37813Sam Ravnborgstatic void pci_bridge_check_ranges(struct pci_bus *bus) 5401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 5411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u16 io; 5421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u32 pmem; 5431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct pci_dev *bridge = bus->self; 5441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct resource *b_res; 5451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds b_res = &bridge->resource[PCI_BRIDGE_RESOURCES]; 5471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds b_res[1].flags |= IORESOURCE_MEM; 5481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_read_config_word(bridge, PCI_IO_BASE, &io); 5501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!io) { 5511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_write_config_word(bridge, PCI_IO_BASE, 0xf0f0); 5521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_read_config_word(bridge, PCI_IO_BASE, &io); 5531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_write_config_word(bridge, PCI_IO_BASE, 0x0); 5541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 5551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (io) 5561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds b_res[0].flags |= IORESOURCE_IO; 5571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* DECchip 21050 pass 2 errata: the bridge may miss an address 5581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds disconnect boundary by one PCI data phase. 5591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds Workaround: do not use prefetching on this device. */ 5601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (bridge->vendor == PCI_VENDOR_ID_DEC && bridge->device == 0x0001) 5611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return; 5621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_read_config_dword(bridge, PCI_PREF_MEMORY_BASE, &pmem); 5631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!pmem) { 5641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_write_config_dword(bridge, PCI_PREF_MEMORY_BASE, 5651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0xfff0fff0); 5661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_read_config_dword(bridge, PCI_PREF_MEMORY_BASE, &pmem); 5671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_write_config_dword(bridge, PCI_PREF_MEMORY_BASE, 0x0); 5681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 5691f82de10d6b1d845155363c895c552e61b36b51aYinghai Lu if (pmem) { 5701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds b_res[2].flags |= IORESOURCE_MEM | IORESOURCE_PREFETCH; 5719958610552c0bd7558b41cb8addbd865587f142aYinghai Lu if ((pmem & PCI_PREF_RANGE_TYPE_MASK) == 5729958610552c0bd7558b41cb8addbd865587f142aYinghai Lu PCI_PREF_RANGE_TYPE_64) { 5731f82de10d6b1d845155363c895c552e61b36b51aYinghai Lu b_res[2].flags |= IORESOURCE_MEM_64; 5749958610552c0bd7558b41cb8addbd865587f142aYinghai Lu b_res[2].flags |= PCI_PREF_RANGE_TYPE_64; 5759958610552c0bd7558b41cb8addbd865587f142aYinghai Lu } 5761f82de10d6b1d845155363c895c552e61b36b51aYinghai Lu } 5771f82de10d6b1d845155363c895c552e61b36b51aYinghai Lu 5781f82de10d6b1d845155363c895c552e61b36b51aYinghai Lu /* double check if bridge does support 64 bit pref */ 5791f82de10d6b1d845155363c895c552e61b36b51aYinghai Lu if (b_res[2].flags & IORESOURCE_MEM_64) { 5801f82de10d6b1d845155363c895c552e61b36b51aYinghai Lu u32 mem_base_hi, tmp; 5811f82de10d6b1d845155363c895c552e61b36b51aYinghai Lu pci_read_config_dword(bridge, PCI_PREF_BASE_UPPER32, 5821f82de10d6b1d845155363c895c552e61b36b51aYinghai Lu &mem_base_hi); 5831f82de10d6b1d845155363c895c552e61b36b51aYinghai Lu pci_write_config_dword(bridge, PCI_PREF_BASE_UPPER32, 5841f82de10d6b1d845155363c895c552e61b36b51aYinghai Lu 0xffffffff); 5851f82de10d6b1d845155363c895c552e61b36b51aYinghai Lu pci_read_config_dword(bridge, PCI_PREF_BASE_UPPER32, &tmp); 5861f82de10d6b1d845155363c895c552e61b36b51aYinghai Lu if (!tmp) 5871f82de10d6b1d845155363c895c552e61b36b51aYinghai Lu b_res[2].flags &= ~IORESOURCE_MEM_64; 5881f82de10d6b1d845155363c895c552e61b36b51aYinghai Lu pci_write_config_dword(bridge, PCI_PREF_BASE_UPPER32, 5891f82de10d6b1d845155363c895c552e61b36b51aYinghai Lu mem_base_hi); 5901f82de10d6b1d845155363c895c552e61b36b51aYinghai Lu } 5911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 5921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* Helper function for sizing routines: find first available 5941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bus resource of a given type. Note: we intentionally skip 5951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds the bus resources which have already been assigned (that is, 5961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds have non-NULL parent resource). */ 59796bde06a2df1b363206d3cdef53134b84ff37813Sam Ravnborgstatic struct resource *find_free_bus_resource(struct pci_bus *bus, unsigned long type) 5981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 5991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int i; 6001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct resource *r; 6011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long type_mask = IORESOURCE_IO | IORESOURCE_MEM | 6021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds IORESOURCE_PREFETCH; 6031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 60489a74ecccd1f78e51faf6287e5c0e93a92ac096eBjorn Helgaas pci_bus_for_each_resource(bus, r, i) { 605299de0343c7d18448a69c635378342e9214b14afIvan Kokshaysky if (r == &ioport_resource || r == &iomem_resource) 606299de0343c7d18448a69c635378342e9214b14afIvan Kokshaysky continue; 60755a1098476619d5d8f4cdae7240ea759274dead7Jesse Barnes if (r && (r->flags & type_mask) == type && !r->parent) 60855a1098476619d5d8f4cdae7240ea759274dead7Jesse Barnes return r; 6091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 6101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return NULL; 6111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 6121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 61313583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Paistatic resource_size_t calculate_iosize(resource_size_t size, 61413583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai resource_size_t min_size, 61513583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai resource_size_t size1, 61613583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai resource_size_t old_size, 61713583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai resource_size_t align) 61813583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai{ 61913583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai if (size < min_size) 62013583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai size = min_size; 62113583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai if (old_size == 1 ) 62213583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai old_size = 0; 62313583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai /* To be fixed in 2.5: we should have sort of HAVE_ISA 62413583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai flag in the struct pci_bus. */ 62513583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai#if defined(CONFIG_ISA) || defined(CONFIG_EISA) 62613583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai size = (size & 0xff) + ((size & ~0xffUL) << 2); 62713583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai#endif 62813583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai size = ALIGN(size + size1, align); 62913583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai if (size < old_size) 63013583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai size = old_size; 63113583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai return size; 63213583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai} 63313583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai 63413583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Paistatic resource_size_t calculate_memsize(resource_size_t size, 63513583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai resource_size_t min_size, 63613583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai resource_size_t size1, 63713583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai resource_size_t old_size, 63813583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai resource_size_t align) 63913583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai{ 64013583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai if (size < min_size) 64113583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai size = min_size; 64213583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai if (old_size == 1 ) 64313583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai old_size = 0; 64413583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai if (size < old_size) 64513583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai size = old_size; 64613583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai size = ALIGN(size + size1, align); 64713583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai return size; 64813583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai} 64913583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai 650c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai/** 651c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * pbus_size_io() - size the io window of a given bus 652c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * 653c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * @bus : the bus 654c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * @min_size : the minimum io window that must to be allocated 655c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * @add_size : additional optional io window 6569e8bf93a7f416a3fa8fb6d76177d90e67bd45496Ram Pai * @realloc_head : track the additional io window on this list 657c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * 658c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * Sizing the IO windows of the PCI-PCI bridge is trivial, 659c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * since these windows have 4K granularity and the IO ranges 660c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * of non-bridge PCI devices are limited to 256 bytes. 661c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * We must be careful with the ISA aliasing though. 662c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai */ 663c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Paistatic void pbus_size_io(struct pci_bus *bus, resource_size_t min_size, 6649e8bf93a7f416a3fa8fb6d76177d90e67bd45496Ram Pai resource_size_t add_size, struct resource_list_x *realloc_head) 6651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 6661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct pci_dev *dev; 6671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct resource *b_res = find_free_bus_resource(bus, IORESOURCE_IO); 668c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai unsigned long size = 0, size0 = 0, size1 = 0; 669be768912a49b10b68e96fbd8fa3cab0adfbd3091Yinghai Lu resource_size_t children_add_size = 0; 6701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!b_res) 6721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return; 6731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds list_for_each_entry(dev, &bus->devices, bus_list) { 6751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int i; 6761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (i = 0; i < PCI_NUM_RESOURCES; i++) { 6781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct resource *r = &dev->resource[i]; 6791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long r_size; 6801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (r->parent || !(r->flags & IORESOURCE_IO)) 6821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds continue; 683022edd86d7c864bc8fadc3c8ac4e6a464472ab05Zhao, Yu r_size = resource_size(r); 6841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (r_size < 0x400) 6861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Might be re-aligned for ISA */ 6871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds size += r_size; 6881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 6891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds size1 += r_size; 690be768912a49b10b68e96fbd8fa3cab0adfbd3091Yinghai Lu 6919e8bf93a7f416a3fa8fb6d76177d90e67bd45496Ram Pai if (realloc_head) 6929e8bf93a7f416a3fa8fb6d76177d90e67bd45496Ram Pai children_add_size += get_res_add_size(realloc_head, r); 6931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 6941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 695c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai size0 = calculate_iosize(size, min_size, size1, 696c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai resource_size(b_res), 4096); 697be768912a49b10b68e96fbd8fa3cab0adfbd3091Yinghai Lu if (children_add_size > add_size) 698be768912a49b10b68e96fbd8fa3cab0adfbd3091Yinghai Lu add_size = children_add_size; 6999e8bf93a7f416a3fa8fb6d76177d90e67bd45496Ram Pai size1 = (!realloc_head || (realloc_head && !add_size)) ? size0 : 700a4ac9fea016fc5c09227eb479bd35e34978323a4Yinghai Lu calculate_iosize(size, min_size, add_size + size1, 70113583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai resource_size(b_res), 4096); 702c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai if (!size0 && !size1) { 703865df576e8fc70daf297b53e61a4fbefc719d065Bjorn Helgaas if (b_res->start || b_res->end) 704865df576e8fc70daf297b53e61a4fbefc719d065Bjorn Helgaas dev_info(&bus->self->dev, "disabling bridge window " 705865df576e8fc70daf297b53e61a4fbefc719d065Bjorn Helgaas "%pR to [bus %02x-%02x] (unused)\n", b_res, 706865df576e8fc70daf297b53e61a4fbefc719d065Bjorn Helgaas bus->secondary, bus->subordinate); 7071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds b_res->flags = 0; 7081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return; 7091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 7101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Alignment of the IO window is always 4K */ 7111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds b_res->start = 4096; 712c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai b_res->end = b_res->start + size0 - 1; 713884525655d07fdee9245716b998ecdc45cdd8007Ivan Kokshaysky b_res->flags |= IORESOURCE_STARTALIGN; 7149e8bf93a7f416a3fa8fb6d76177d90e67bd45496Ram Pai if (size1 > size0 && realloc_head) 7159e8bf93a7f416a3fa8fb6d76177d90e67bd45496Ram Pai add_to_list(realloc_head, bus->self, b_res, size1-size0, 4096); 7161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 7171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 718c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai/** 719c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * pbus_size_mem() - size the memory window of a given bus 720c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * 721c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * @bus : the bus 722c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * @min_size : the minimum memory window that must to be allocated 723c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * @add_size : additional optional memory window 7249e8bf93a7f416a3fa8fb6d76177d90e67bd45496Ram Pai * @realloc_head : track the additional memory window on this list 725c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * 726c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * Calculate the size of the bus and minimal alignment which 727c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * guarantees that all child resources fit in this size. 728c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai */ 72928760489a3f1e136c5ae8581c0fa8f63511f2f4cEric W. Biedermanstatic int pbus_size_mem(struct pci_bus *bus, unsigned long mask, 730c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai unsigned long type, resource_size_t min_size, 731c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai resource_size_t add_size, 7329e8bf93a7f416a3fa8fb6d76177d90e67bd45496Ram Pai struct resource_list_x *realloc_head) 7331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 7341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct pci_dev *dev; 735c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai resource_size_t min_align, align, size, size0, size1; 736c40a22e0ce5eb400f27449e59e43d021bee58b8dBenjamin Herrenschmidt resource_size_t aligns[12]; /* Alignments from 1Mb to 2Gb */ 7371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int order, max_order; 7381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct resource *b_res = find_free_bus_resource(bus, type); 7391f82de10d6b1d845155363c895c552e61b36b51aYinghai Lu unsigned int mem64_mask = 0; 740be768912a49b10b68e96fbd8fa3cab0adfbd3091Yinghai Lu resource_size_t children_add_size = 0; 7411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!b_res) 7431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 7441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds memset(aligns, 0, sizeof(aligns)); 7461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds max_order = 0; 7471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds size = 0; 7481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7491f82de10d6b1d845155363c895c552e61b36b51aYinghai Lu mem64_mask = b_res->flags & IORESOURCE_MEM_64; 7501f82de10d6b1d845155363c895c552e61b36b51aYinghai Lu b_res->flags &= ~IORESOURCE_MEM_64; 7511f82de10d6b1d845155363c895c552e61b36b51aYinghai Lu 7521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds list_for_each_entry(dev, &bus->devices, bus_list) { 7531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int i; 7541f82de10d6b1d845155363c895c552e61b36b51aYinghai Lu 7551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (i = 0; i < PCI_NUM_RESOURCES; i++) { 7561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct resource *r = &dev->resource[i]; 757c40a22e0ce5eb400f27449e59e43d021bee58b8dBenjamin Herrenschmidt resource_size_t r_size; 7581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (r->parent || (r->flags & mask) != type) 7601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds continue; 761022edd86d7c864bc8fadc3c8ac4e6a464472ab05Zhao, Yu r_size = resource_size(r); 7622aceefcbd5a73059e5f52831817ec277e987440dYinghai Lu#ifdef CONFIG_PCI_IOV 7632aceefcbd5a73059e5f52831817ec277e987440dYinghai Lu /* put SRIOV requested res to the optional list */ 7649e8bf93a7f416a3fa8fb6d76177d90e67bd45496Ram Pai if (realloc_head && i >= PCI_IOV_RESOURCES && 7652aceefcbd5a73059e5f52831817ec277e987440dYinghai Lu i <= PCI_IOV_RESOURCE_END) { 7662aceefcbd5a73059e5f52831817ec277e987440dYinghai Lu r->end = r->start - 1; 7679e8bf93a7f416a3fa8fb6d76177d90e67bd45496Ram Pai add_to_list(realloc_head, dev, r, r_size, 0/* dont' care */); 7682aceefcbd5a73059e5f52831817ec277e987440dYinghai Lu children_add_size += r_size; 7692aceefcbd5a73059e5f52831817ec277e987440dYinghai Lu continue; 7702aceefcbd5a73059e5f52831817ec277e987440dYinghai Lu } 7712aceefcbd5a73059e5f52831817ec277e987440dYinghai Lu#endif 7721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* For bridges size != alignment */ 7736faf17f6f1ffc586d16efc2f9fa2083a7785ee74Chris Wright align = pci_resource_alignment(dev, r); 7741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds order = __ffs(align) - 20; 7751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (order > 11) { 776865df576e8fc70daf297b53e61a4fbefc719d065Bjorn Helgaas dev_warn(&dev->dev, "disabling BAR %d: %pR " 777865df576e8fc70daf297b53e61a4fbefc719d065Bjorn Helgaas "(bad alignment %#llx)\n", i, r, 778865df576e8fc70daf297b53e61a4fbefc719d065Bjorn Helgaas (unsigned long long) align); 7791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds r->flags = 0; 7801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds continue; 7811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 7821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds size += r_size; 7831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (order < 0) 7841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds order = 0; 7851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Exclude ranges with size > align from 7861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds calculation of the alignment. */ 7871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (r_size == align) 7881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds aligns[order] += align; 7891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (order > max_order) 7901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds max_order = order; 7911f82de10d6b1d845155363c895c552e61b36b51aYinghai Lu mem64_mask &= r->flags & IORESOURCE_MEM_64; 792be768912a49b10b68e96fbd8fa3cab0adfbd3091Yinghai Lu 7939e8bf93a7f416a3fa8fb6d76177d90e67bd45496Ram Pai if (realloc_head) 7949e8bf93a7f416a3fa8fb6d76177d90e67bd45496Ram Pai children_add_size += get_res_add_size(realloc_head, r); 7951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 7961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 7971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds align = 0; 7981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds min_align = 0; 7991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (order = 0; order <= max_order; order++) { 8008308c54d7e312f7a03e2ce2057d0837e6fe3843fJeremy Fitzhardinge resource_size_t align1 = 1; 8018308c54d7e312f7a03e2ce2057d0837e6fe3843fJeremy Fitzhardinge 8028308c54d7e312f7a03e2ce2057d0837e6fe3843fJeremy Fitzhardinge align1 <<= (order + 20); 8038308c54d7e312f7a03e2ce2057d0837e6fe3843fJeremy Fitzhardinge 8041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!align) 8051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds min_align = align1; 8066f6f8c2f4b59711857d14ada8e70309d52e8fae4Milind Arun Choudhary else if (ALIGN(align + min_align, min_align) < align1) 8071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds min_align = align1 >> 1; 8081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds align += aligns[order]; 8091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 810b42282e5a05018ecdc0d63a4ad530b0999785912Linus Torvalds size0 = calculate_memsize(size, min_size, 0, resource_size(b_res), min_align); 811be768912a49b10b68e96fbd8fa3cab0adfbd3091Yinghai Lu if (children_add_size > add_size) 812be768912a49b10b68e96fbd8fa3cab0adfbd3091Yinghai Lu add_size = children_add_size; 8139e8bf93a7f416a3fa8fb6d76177d90e67bd45496Ram Pai size1 = (!realloc_head || (realloc_head && !add_size)) ? size0 : 814a4ac9fea016fc5c09227eb479bd35e34978323a4Yinghai Lu calculate_memsize(size, min_size, add_size, 815b42282e5a05018ecdc0d63a4ad530b0999785912Linus Torvalds resource_size(b_res), min_align); 816c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai if (!size0 && !size1) { 817865df576e8fc70daf297b53e61a4fbefc719d065Bjorn Helgaas if (b_res->start || b_res->end) 818865df576e8fc70daf297b53e61a4fbefc719d065Bjorn Helgaas dev_info(&bus->self->dev, "disabling bridge window " 819865df576e8fc70daf297b53e61a4fbefc719d065Bjorn Helgaas "%pR to [bus %02x-%02x] (unused)\n", b_res, 820865df576e8fc70daf297b53e61a4fbefc719d065Bjorn Helgaas bus->secondary, bus->subordinate); 8211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds b_res->flags = 0; 8221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 1; 8231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 8241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds b_res->start = min_align; 825c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai b_res->end = size0 + min_align - 1; 826c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai b_res->flags |= IORESOURCE_STARTALIGN | mem64_mask; 8279e8bf93a7f416a3fa8fb6d76177d90e67bd45496Ram Pai if (size1 > size0 && realloc_head) 8289e8bf93a7f416a3fa8fb6d76177d90e67bd45496Ram Pai add_to_list(realloc_head, bus->self, b_res, size1-size0, min_align); 8291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 1; 8301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 8311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8320a2daa1cf35004f5adbf4138555cc5669abf3a3eRam Paiunsigned long pci_cardbus_resource_alignment(struct resource *res) 8330a2daa1cf35004f5adbf4138555cc5669abf3a3eRam Pai{ 8340a2daa1cf35004f5adbf4138555cc5669abf3a3eRam Pai if (res->flags & IORESOURCE_IO) 8350a2daa1cf35004f5adbf4138555cc5669abf3a3eRam Pai return pci_cardbus_io_size; 8360a2daa1cf35004f5adbf4138555cc5669abf3a3eRam Pai if (res->flags & IORESOURCE_MEM) 8370a2daa1cf35004f5adbf4138555cc5669abf3a3eRam Pai return pci_cardbus_mem_size; 8380a2daa1cf35004f5adbf4138555cc5669abf3a3eRam Pai return 0; 8390a2daa1cf35004f5adbf4138555cc5669abf3a3eRam Pai} 8400a2daa1cf35004f5adbf4138555cc5669abf3a3eRam Pai 8410a2daa1cf35004f5adbf4138555cc5669abf3a3eRam Paistatic void pci_bus_size_cardbus(struct pci_bus *bus, 8429e8bf93a7f416a3fa8fb6d76177d90e67bd45496Ram Pai struct resource_list_x *realloc_head) 8431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 8441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct pci_dev *bridge = bus->self; 8451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct resource *b_res = &bridge->resource[PCI_BRIDGE_RESOURCES]; 8461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u16 ctrl; 8471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* 8491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Reserve some resources for CardBus. We reserve 8501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * a fixed amount of bus space for CardBus bridges. 8511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 852934b7024f0ed29003c95cef447d92737ab86dc4fLinus Torvalds b_res[0].start = 0; 853934b7024f0ed29003c95cef447d92737ab86dc4fLinus Torvalds b_res[0].flags |= IORESOURCE_IO | IORESOURCE_SIZEALIGN; 8549e8bf93a7f416a3fa8fb6d76177d90e67bd45496Ram Pai if (realloc_head) 8559e8bf93a7f416a3fa8fb6d76177d90e67bd45496Ram Pai add_to_list(realloc_head, bridge, b_res, pci_cardbus_io_size, 0 /* dont care */); 8561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 857934b7024f0ed29003c95cef447d92737ab86dc4fLinus Torvalds b_res[1].start = 0; 858934b7024f0ed29003c95cef447d92737ab86dc4fLinus Torvalds b_res[1].flags |= IORESOURCE_IO | IORESOURCE_SIZEALIGN; 8599e8bf93a7f416a3fa8fb6d76177d90e67bd45496Ram Pai if (realloc_head) 8609e8bf93a7f416a3fa8fb6d76177d90e67bd45496Ram Pai add_to_list(realloc_head, bridge, b_res+1, pci_cardbus_io_size, 0 /* dont care */); 8611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* 8631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Check whether prefetchable memory is supported 8641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * by this bridge. 8651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 8661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_read_config_word(bridge, PCI_CB_BRIDGE_CONTROL, &ctrl); 8671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!(ctrl & PCI_CB_BRIDGE_CTL_PREFETCH_MEM0)) { 8681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ctrl |= PCI_CB_BRIDGE_CTL_PREFETCH_MEM0; 8691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_write_config_word(bridge, PCI_CB_BRIDGE_CONTROL, ctrl); 8701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_read_config_word(bridge, PCI_CB_BRIDGE_CONTROL, &ctrl); 8711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 8721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* 8741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * If we have prefetchable memory support, allocate 8751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * two regions. Otherwise, allocate one region of 8761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * twice the size. 8771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 8781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (ctrl & PCI_CB_BRIDGE_CTL_PREFETCH_MEM0) { 879934b7024f0ed29003c95cef447d92737ab86dc4fLinus Torvalds b_res[2].start = 0; 880934b7024f0ed29003c95cef447d92737ab86dc4fLinus Torvalds b_res[2].flags |= IORESOURCE_MEM | IORESOURCE_PREFETCH | IORESOURCE_SIZEALIGN; 8819e8bf93a7f416a3fa8fb6d76177d90e67bd45496Ram Pai if (realloc_head) 8829e8bf93a7f416a3fa8fb6d76177d90e67bd45496Ram Pai add_to_list(realloc_head, bridge, b_res+2, pci_cardbus_mem_size, 0 /* dont care */); 8831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 884934b7024f0ed29003c95cef447d92737ab86dc4fLinus Torvalds b_res[3].start = 0; 885934b7024f0ed29003c95cef447d92737ab86dc4fLinus Torvalds b_res[3].flags |= IORESOURCE_MEM | IORESOURCE_SIZEALIGN; 8869e8bf93a7f416a3fa8fb6d76177d90e67bd45496Ram Pai if (realloc_head) 8879e8bf93a7f416a3fa8fb6d76177d90e67bd45496Ram Pai add_to_list(realloc_head, bridge, b_res+3, pci_cardbus_mem_size, 0 /* dont care */); 8881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else { 889934b7024f0ed29003c95cef447d92737ab86dc4fLinus Torvalds b_res[3].start = 0; 890934b7024f0ed29003c95cef447d92737ab86dc4fLinus Torvalds b_res[3].flags |= IORESOURCE_MEM | IORESOURCE_SIZEALIGN; 8919e8bf93a7f416a3fa8fb6d76177d90e67bd45496Ram Pai if (realloc_head) 8929e8bf93a7f416a3fa8fb6d76177d90e67bd45496Ram Pai add_to_list(realloc_head, bridge, b_res+3, pci_cardbus_mem_size * 2, 0 /* dont care */); 8931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 8940a2daa1cf35004f5adbf4138555cc5669abf3a3eRam Pai 8950a2daa1cf35004f5adbf4138555cc5669abf3a3eRam Pai /* set the size of the resource to zero, so that the resource does not 8960a2daa1cf35004f5adbf4138555cc5669abf3a3eRam Pai * get assigned during required-resource allocation cycle but gets assigned 8970a2daa1cf35004f5adbf4138555cc5669abf3a3eRam Pai * during the optional-resource allocation cycle. 8980a2daa1cf35004f5adbf4138555cc5669abf3a3eRam Pai */ 8990a2daa1cf35004f5adbf4138555cc5669abf3a3eRam Pai b_res[0].start = b_res[1].start = b_res[2].start = b_res[3].start = 1; 9000a2daa1cf35004f5adbf4138555cc5669abf3a3eRam Pai b_res[0].end = b_res[1].end = b_res[2].end = b_res[3].end = 0; 9011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 9021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 903c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Paivoid __ref __pci_bus_size_bridges(struct pci_bus *bus, 9049e8bf93a7f416a3fa8fb6d76177d90e67bd45496Ram Pai struct resource_list_x *realloc_head) 9051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 9061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct pci_dev *dev; 9071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long mask, prefmask; 908c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai resource_size_t additional_mem_size = 0, additional_io_size = 0; 9091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds list_for_each_entry(dev, &bus->devices, bus_list) { 9111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct pci_bus *b = dev->subordinate; 9121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!b) 9131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds continue; 9141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds switch (dev->class >> 8) { 9161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case PCI_CLASS_BRIDGE_CARDBUS: 9179e8bf93a7f416a3fa8fb6d76177d90e67bd45496Ram Pai pci_bus_size_cardbus(b, realloc_head); 9181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 9191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case PCI_CLASS_BRIDGE_PCI: 9211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds default: 9229e8bf93a7f416a3fa8fb6d76177d90e67bd45496Ram Pai __pci_bus_size_bridges(b, realloc_head); 9231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 9241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 9251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 9261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* The root bus? */ 9281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!bus->self) 9291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return; 9301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds switch (bus->self->class >> 8) { 9321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case PCI_CLASS_BRIDGE_CARDBUS: 9331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* don't size cardbuses yet. */ 9341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 9351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case PCI_CLASS_BRIDGE_PCI: 9371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_bridge_check_ranges(bus); 93828760489a3f1e136c5ae8581c0fa8f63511f2f4cEric W. Biederman if (bus->self->is_hotplug_bridge) { 939c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai additional_io_size = pci_hotplug_io_size; 940c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai additional_mem_size = pci_hotplug_mem_size; 94128760489a3f1e136c5ae8581c0fa8f63511f2f4cEric W. Biederman } 942c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai /* 943c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * Follow thru 944c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai */ 9451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds default: 9469e8bf93a7f416a3fa8fb6d76177d90e67bd45496Ram Pai pbus_size_io(bus, 0, additional_io_size, realloc_head); 9471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* If the bridge supports prefetchable range, size it 9481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds separately. If it doesn't, or its prefetchable window 9491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds has already been allocated by arch code, try 9501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds non-prefetchable range for both types of PCI memory 9511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds resources. */ 9521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mask = IORESOURCE_MEM; 9531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds prefmask = IORESOURCE_MEM | IORESOURCE_PREFETCH; 9549e8bf93a7f416a3fa8fb6d76177d90e67bd45496Ram Pai if (pbus_size_mem(bus, prefmask, prefmask, 0, additional_mem_size, realloc_head)) 9551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mask = prefmask; /* Success, size non-prefetch only. */ 95628760489a3f1e136c5ae8581c0fa8f63511f2f4cEric W. Biederman else 957c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai additional_mem_size += additional_mem_size; 9589e8bf93a7f416a3fa8fb6d76177d90e67bd45496Ram Pai pbus_size_mem(bus, mask, IORESOURCE_MEM, 0, additional_mem_size, realloc_head); 9591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 9601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 9611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 962c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai 963c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Paivoid __ref pci_bus_size_bridges(struct pci_bus *bus) 964c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai{ 965c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai __pci_bus_size_bridges(bus, NULL); 966c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai} 9671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL(pci_bus_size_bridges); 9681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 969568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lustatic void __ref __pci_bus_assign_resources(const struct pci_bus *bus, 9709e8bf93a7f416a3fa8fb6d76177d90e67bd45496Ram Pai struct resource_list_x *realloc_head, 971568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu struct resource_list_x *fail_head) 9721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 9731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct pci_bus *b; 9741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct pci_dev *dev; 9751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9769e8bf93a7f416a3fa8fb6d76177d90e67bd45496Ram Pai pbus_assign_resources_sorted(bus, realloc_head, fail_head); 9771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds list_for_each_entry(dev, &bus->devices, bus_list) { 9791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds b = dev->subordinate; 9801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!b) 9811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds continue; 9821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9839e8bf93a7f416a3fa8fb6d76177d90e67bd45496Ram Pai __pci_bus_assign_resources(b, realloc_head, fail_head); 9841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds switch (dev->class >> 8) { 9861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case PCI_CLASS_BRIDGE_PCI: 9876841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu if (!pci_is_enabled(dev)) 9886841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu pci_setup_bridge(b); 9891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 9901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case PCI_CLASS_BRIDGE_CARDBUS: 9921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_setup_cardbus(b); 9931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 9941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds default: 99680ccba1186d48fa728dc4b1456cc07ffb07da501Bjorn Helgaas dev_info(&dev->dev, "not setting up bridge for bus " 99780ccba1186d48fa728dc4b1456cc07ffb07da501Bjorn Helgaas "%04x:%02x\n", pci_domain_nr(b), b->number); 9981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 9991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 10001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 10011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 1002568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu 1003568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Luvoid __ref pci_bus_assign_resources(const struct pci_bus *bus) 1004568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu{ 1005c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai __pci_bus_assign_resources(bus, NULL, NULL); 1006568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu} 10071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL(pci_bus_assign_resources); 10081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10096841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lustatic void __ref __pci_bridge_assign_resources(const struct pci_dev *bridge, 10108424d7592eab8245b51051ee458e598213bca3b2Yinghai Lu struct resource_list_x *add_head, 10116841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu struct resource_list_x *fail_head) 10126841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu{ 10136841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu struct pci_bus *b; 10146841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu 10158424d7592eab8245b51051ee458e598213bca3b2Yinghai Lu pdev_assign_resources_sorted((struct pci_dev *)bridge, 10168424d7592eab8245b51051ee458e598213bca3b2Yinghai Lu add_head, fail_head); 10176841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu 10186841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu b = bridge->subordinate; 10196841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu if (!b) 10206841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu return; 10216841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu 10228424d7592eab8245b51051ee458e598213bca3b2Yinghai Lu __pci_bus_assign_resources(b, add_head, fail_head); 10236841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu 10246841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu switch (bridge->class >> 8) { 10256841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu case PCI_CLASS_BRIDGE_PCI: 10266841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu pci_setup_bridge(b); 10276841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu break; 10286841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu 10296841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu case PCI_CLASS_BRIDGE_CARDBUS: 10306841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu pci_setup_cardbus(b); 10316841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu break; 10326841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu 10336841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu default: 10346841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu dev_info(&bridge->dev, "not setting up bridge for bus " 10356841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu "%04x:%02x\n", pci_domain_nr(b), b->number); 10366841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu break; 10376841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu } 10386841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu} 10395009b46025acb2d3955d2c93574604fba667ef39Yinghai Lustatic void pci_bridge_release_resources(struct pci_bus *bus, 10405009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu unsigned long type) 10415009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu{ 10425009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu int idx; 10435009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu bool changed = false; 10445009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu struct pci_dev *dev; 10455009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu struct resource *r; 10465009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu unsigned long type_mask = IORESOURCE_IO | IORESOURCE_MEM | 10475009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu IORESOURCE_PREFETCH; 10485009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu 10495009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu dev = bus->self; 10505009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu for (idx = PCI_BRIDGE_RESOURCES; idx <= PCI_BRIDGE_RESOURCE_END; 10515009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu idx++) { 10525009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu r = &dev->resource[idx]; 10535009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu if ((r->flags & type_mask) != type) 10545009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu continue; 10555009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu if (!r->parent) 10565009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu continue; 10575009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu /* 10585009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu * if there are children under that, we should release them 10595009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu * all 10605009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu */ 10615009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu release_child_resources(r); 10625009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu if (!release_resource(r)) { 10635009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu dev_printk(KERN_DEBUG, &dev->dev, 10645009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu "resource %d %pR released\n", idx, r); 10655009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu /* keep the old size */ 10665009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu r->end = resource_size(r) - 1; 10675009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu r->start = 0; 10685009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu r->flags = 0; 10695009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu changed = true; 10705009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu } 10715009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu } 10725009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu 10735009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu if (changed) { 10745009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu /* avoiding touch the one without PREF */ 10755009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu if (type & IORESOURCE_PREFETCH) 10765009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu type = IORESOURCE_PREFETCH; 10775009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu __pci_setup_bridge(bus, type); 10785009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu } 10795009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu} 10805009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu 10815009b46025acb2d3955d2c93574604fba667ef39Yinghai Luenum release_type { 10825009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu leaf_only, 10835009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu whole_subtree, 10845009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu}; 10855009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu/* 10865009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu * try to release pci bridge resources that is from leaf bridge, 10875009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu * so we can allocate big new one later 10885009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu */ 10895009b46025acb2d3955d2c93574604fba667ef39Yinghai Lustatic void __ref pci_bus_release_bridge_resources(struct pci_bus *bus, 10905009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu unsigned long type, 10915009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu enum release_type rel_type) 10925009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu{ 10935009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu struct pci_dev *dev; 10945009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu bool is_leaf_bridge = true; 10955009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu 10965009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu list_for_each_entry(dev, &bus->devices, bus_list) { 10975009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu struct pci_bus *b = dev->subordinate; 10985009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu if (!b) 10995009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu continue; 11005009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu 11015009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu is_leaf_bridge = false; 11025009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu 11035009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu if ((dev->class >> 8) != PCI_CLASS_BRIDGE_PCI) 11045009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu continue; 11055009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu 11065009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu if (rel_type == whole_subtree) 11075009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu pci_bus_release_bridge_resources(b, type, 11085009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu whole_subtree); 11095009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu } 11105009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu 11115009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu if (pci_is_root_bus(bus)) 11125009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu return; 11135009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu 11145009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu if ((bus->self->class >> 8) != PCI_CLASS_BRIDGE_PCI) 11155009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu return; 11165009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu 11175009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu if ((rel_type == whole_subtree) || is_leaf_bridge) 11185009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu pci_bridge_release_resources(bus, type); 11195009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu} 11205009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu 112176fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lustatic void pci_bus_dump_res(struct pci_bus *bus) 112276fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lu{ 112389a74ecccd1f78e51faf6287e5c0e93a92ac096eBjorn Helgaas struct resource *res; 112489a74ecccd1f78e51faf6287e5c0e93a92ac096eBjorn Helgaas int i; 11257c9342b8dd1a32386fc32bffb9eedebbfe264763Yinghai Lu 112689a74ecccd1f78e51faf6287e5c0e93a92ac096eBjorn Helgaas pci_bus_for_each_resource(bus, res, i) { 11277c9342b8dd1a32386fc32bffb9eedebbfe264763Yinghai Lu if (!res || !res->end || !res->flags) 112876fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lu continue; 112976fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lu 1130c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas dev_printk(KERN_DEBUG, &bus->dev, "resource %d %pR\n", i, res); 113176fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lu } 113276fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lu} 113376fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lu 113476fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lustatic void pci_bus_dump_resources(struct pci_bus *bus) 113576fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lu{ 113676fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lu struct pci_bus *b; 113776fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lu struct pci_dev *dev; 113876fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lu 113976fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lu 114076fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lu pci_bus_dump_res(bus); 114176fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lu 114276fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lu list_for_each_entry(dev, &bus->devices, bus_list) { 114376fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lu b = dev->subordinate; 114476fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lu if (!b) 114576fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lu continue; 114676fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lu 114776fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lu pci_bus_dump_resources(b); 114876fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lu } 114976fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lu} 115076fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lu 1151da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lustatic int __init pci_bus_get_depth(struct pci_bus *bus) 1152da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu{ 1153da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu int depth = 0; 1154da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu struct pci_dev *dev; 1155da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu 1156da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu list_for_each_entry(dev, &bus->devices, bus_list) { 1157da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu int ret; 1158da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu struct pci_bus *b = dev->subordinate; 1159da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu if (!b) 1160da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu continue; 1161da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu 1162da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu ret = pci_bus_get_depth(b); 1163da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu if (ret + 1 > depth) 1164da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu depth = ret + 1; 1165da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu } 1166da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu 1167da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu return depth; 1168da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu} 1169da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lustatic int __init pci_get_max_depth(void) 1170da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu{ 1171da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu int depth = 0; 1172da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu struct pci_bus *bus; 1173da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu 1174da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu list_for_each_entry(bus, &pci_root_buses, node) { 1175da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu int ret; 1176da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu 1177da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu ret = pci_bus_get_depth(bus); 1178da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu if (ret > depth) 1179da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu depth = ret; 1180da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu } 1181da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu 1182da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu return depth; 1183da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu} 1184da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu 1185f483d3923dc3a6394c483e28ccb3fe700bdf399eRam Pai 1186da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu/* 1187da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu * first try will not touch pci bridge res 1188da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu * second and later try will clear small leaf bridge res 1189da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu * will stop till to the max deepth if can not find good one 1190da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu */ 11911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid __init 11921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldspci_assign_unassigned_resources(void) 11931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 11941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct pci_bus *bus; 11959e8bf93a7f416a3fa8fb6d76177d90e67bd45496Ram Pai struct resource_list_x realloc_list; /* list of resources that 1196c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai want additional resources */ 1197da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu int tried_times = 0; 1198da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu enum release_type rel_type = leaf_only; 1199da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu struct resource_list_x head, *list; 1200da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu unsigned long type_mask = IORESOURCE_IO | IORESOURCE_MEM | 1201da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu IORESOURCE_PREFETCH; 1202da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu unsigned long failed_type; 1203da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu int max_depth = pci_get_max_depth(); 1204da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu int pci_try_num; 1205da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu 1206da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu 1207da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu head.next = NULL; 12089e8bf93a7f416a3fa8fb6d76177d90e67bd45496Ram Pai realloc_list.next = NULL; 1209da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu 1210da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu pci_try_num = max_depth + 1; 1211da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu printk(KERN_DEBUG "PCI: max bus depth: %d pci_try_num: %d\n", 1212da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu max_depth, pci_try_num); 1213da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu 1214da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Luagain: 12151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Depth first, calculate sizes and alignments of all 12161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds subordinate buses. */ 1217da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu list_for_each_entry(bus, &pci_root_buses, node) 12189e8bf93a7f416a3fa8fb6d76177d90e67bd45496Ram Pai __pci_bus_size_bridges(bus, &realloc_list); 1219c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai 12201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Depth last, allocate resources and update the hardware. */ 1221da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu list_for_each_entry(bus, &pci_root_buses, node) 12229e8bf93a7f416a3fa8fb6d76177d90e67bd45496Ram Pai __pci_bus_assign_resources(bus, &realloc_list, &head); 12239e8bf93a7f416a3fa8fb6d76177d90e67bd45496Ram Pai BUG_ON(realloc_list.next); 1224da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu tried_times++; 1225da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu 1226da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu /* any device complain? */ 1227da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu if (!head.next) 1228da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu goto enable_and_dump; 1229f483d3923dc3a6394c483e28ccb3fe700bdf399eRam Pai 1230f483d3923dc3a6394c483e28ccb3fe700bdf399eRam Pai /* don't realloc if asked to do so */ 1231f483d3923dc3a6394c483e28ccb3fe700bdf399eRam Pai if (!pci_realloc_enabled()) { 1232f483d3923dc3a6394c483e28ccb3fe700bdf399eRam Pai free_list(resource_list_x, &head); 1233f483d3923dc3a6394c483e28ccb3fe700bdf399eRam Pai goto enable_and_dump; 1234f483d3923dc3a6394c483e28ccb3fe700bdf399eRam Pai } 1235f483d3923dc3a6394c483e28ccb3fe700bdf399eRam Pai 1236da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu failed_type = 0; 1237da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu for (list = head.next; list;) { 1238da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu failed_type |= list->flags; 1239da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu list = list->next; 1240da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu } 1241da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu /* 1242da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu * io port are tight, don't try extra 1243da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu * or if reach the limit, don't want to try more 1244da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu */ 1245da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu failed_type &= type_mask; 1246da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu if ((failed_type == IORESOURCE_IO) || (tried_times >= pci_try_num)) { 1247da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu free_list(resource_list_x, &head); 1248da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu goto enable_and_dump; 1249da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu } 1250da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu 1251da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu printk(KERN_DEBUG "PCI: No. %d try to assign unassigned res\n", 1252da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu tried_times + 1); 1253da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu 1254da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu /* third times and later will not check if it is leaf */ 1255da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu if ((tried_times + 1) > 2) 1256da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu rel_type = whole_subtree; 1257da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu 1258da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu /* 1259da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu * Try to release leaf bridge's resources that doesn't fit resource of 1260da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu * child device under that bridge 1261da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu */ 1262da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu for (list = head.next; list;) { 1263da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu bus = list->dev->bus; 1264da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu pci_bus_release_bridge_resources(bus, list->flags & type_mask, 1265da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu rel_type); 1266da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu list = list->next; 1267da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu } 1268da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu /* restore size and flags */ 1269da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu for (list = head.next; list;) { 1270da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu struct resource *res = list->res; 1271da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu 1272da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu res->start = list->start; 1273da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu res->end = list->end; 1274da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu res->flags = list->flags; 1275da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu if (list->dev->subordinate) 1276da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu res->flags = 0; 1277da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu 1278da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu list = list->next; 1279da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu } 1280da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu free_list(resource_list_x, &head); 1281da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu 1282da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu goto again; 1283da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu 1284da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Luenable_and_dump: 1285da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu /* Depth last, update the hardware. */ 1286da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu list_for_each_entry(bus, &pci_root_buses, node) 1287da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu pci_enable_bridges(bus); 128876fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lu 128976fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lu /* dump the resource on buses */ 1290da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu list_for_each_entry(bus, &pci_root_buses, node) 129176fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lu pci_bus_dump_resources(bus); 12921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 12936841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu 12946841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Luvoid pci_assign_unassigned_bridge_resources(struct pci_dev *bridge) 12956841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu{ 12966841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu struct pci_bus *parent = bridge->subordinate; 12978424d7592eab8245b51051ee458e598213bca3b2Yinghai Lu struct resource_list_x add_list; /* list of resources that 12988424d7592eab8245b51051ee458e598213bca3b2Yinghai Lu want additional resources */ 129932180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu int tried_times = 0; 130032180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu struct resource_list_x head, *list; 13016841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu int retval; 130232180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu unsigned long type_mask = IORESOURCE_IO | IORESOURCE_MEM | 130332180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu IORESOURCE_PREFETCH; 130432180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu 130532180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu head.next = NULL; 13068424d7592eab8245b51051ee458e598213bca3b2Yinghai Lu add_list.next = NULL; 13076841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu 130832180e402f9ff1f3389c99edf3f393425e706080Yinghai Luagain: 13098424d7592eab8245b51051ee458e598213bca3b2Yinghai Lu __pci_bus_size_bridges(parent, &add_list); 13108424d7592eab8245b51051ee458e598213bca3b2Yinghai Lu __pci_bridge_assign_resources(bridge, &add_list, &head); 13118424d7592eab8245b51051ee458e598213bca3b2Yinghai Lu BUG_ON(add_list.next); 131232180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu tried_times++; 131332180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu 131432180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu if (!head.next) 13153f579c340fe6d6bdd8c6f9f144e7c3b85d4174ecYinghai Lu goto enable_all; 131632180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu 131732180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu if (tried_times >= 2) { 131832180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu /* still fail, don't need to try more */ 1319094732a520caae81ae1532af29da82a4fa953472Ram Pai free_list(resource_list_x, &head); 13203f579c340fe6d6bdd8c6f9f144e7c3b85d4174ecYinghai Lu goto enable_all; 132132180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu } 132232180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu 132332180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu printk(KERN_DEBUG "PCI: No. %d try to assign unassigned res\n", 132432180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu tried_times + 1); 132532180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu 132632180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu /* 132732180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu * Try to release leaf bridge's resources that doesn't fit resource of 132832180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu * child device under that bridge 132932180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu */ 133032180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu for (list = head.next; list;) { 133132180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu struct pci_bus *bus = list->dev->bus; 133232180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu unsigned long flags = list->flags; 133332180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu 133432180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu pci_bus_release_bridge_resources(bus, flags & type_mask, 133532180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu whole_subtree); 133632180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu list = list->next; 133732180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu } 133832180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu /* restore size and flags */ 133932180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu for (list = head.next; list;) { 134032180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu struct resource *res = list->res; 134132180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu 134232180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu res->start = list->start; 134332180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu res->end = list->end; 134432180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu res->flags = list->flags; 134532180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu if (list->dev->subordinate) 134632180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu res->flags = 0; 134732180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu 134832180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu list = list->next; 134932180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu } 1350094732a520caae81ae1532af29da82a4fa953472Ram Pai free_list(resource_list_x, &head); 135132180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu 135232180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu goto again; 13533f579c340fe6d6bdd8c6f9f144e7c3b85d4174ecYinghai Lu 13543f579c340fe6d6bdd8c6f9f144e7c3b85d4174ecYinghai Luenable_all: 13553f579c340fe6d6bdd8c6f9f144e7c3b85d4174ecYinghai Lu retval = pci_reenable_device(bridge); 13563f579c340fe6d6bdd8c6f9f144e7c3b85d4174ecYinghai Lu pci_set_master(bridge); 13573f579c340fe6d6bdd8c6f9f144e7c3b85d4174ecYinghai Lu pci_enable_bridges(parent); 13586841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu} 13596841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai LuEXPORT_SYMBOL_GPL(pci_assign_unassigned_bridge_resources); 1360