setup-bus.c revision f483d3923dc3a6394c483e28ccb3fe700bdf399e
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; 37568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu unsigned long flags; 38568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu}; 39568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu 40094732a520caae81ae1532af29da82a4fa953472Ram Pai#define free_list(type, head) do { \ 41094732a520caae81ae1532af29da82a4fa953472Ram Pai struct type *list, *tmp; \ 42094732a520caae81ae1532af29da82a4fa953472Ram Pai for (list = (head)->next; list;) { \ 43094732a520caae81ae1532af29da82a4fa953472Ram Pai tmp = list; \ 44094732a520caae81ae1532af29da82a4fa953472Ram Pai list = list->next; \ 45094732a520caae81ae1532af29da82a4fa953472Ram Pai kfree(tmp); \ 46094732a520caae81ae1532af29da82a4fa953472Ram Pai } \ 47094732a520caae81ae1532af29da82a4fa953472Ram Pai (head)->next = NULL; \ 48094732a520caae81ae1532af29da82a4fa953472Ram Pai} while (0) 49094732a520caae81ae1532af29da82a4fa953472Ram Pai 50f483d3923dc3a6394c483e28ccb3fe700bdf399eRam Paiint pci_realloc_enable = 0; 51f483d3923dc3a6394c483e28ccb3fe700bdf399eRam Pai#define pci_realloc_enabled() pci_realloc_enable 52f483d3923dc3a6394c483e28ccb3fe700bdf399eRam Paivoid pci_realloc(void) 53f483d3923dc3a6394c483e28ccb3fe700bdf399eRam Pai{ 54f483d3923dc3a6394c483e28ccb3fe700bdf399eRam Pai pci_realloc_enable = 1; 55f483d3923dc3a6394c483e28ccb3fe700bdf399eRam Pai} 56f483d3923dc3a6394c483e28ccb3fe700bdf399eRam Pai 57c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai/** 58c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * add_to_list() - add a new resource tracker to the list 59c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * @head: Head of the list 60c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * @dev: device corresponding to which the resource 61c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * belongs 62c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * @res: The resource to be tracked 63c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * @add_size: additional size to be optionally added 64c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * to the resource 65c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai */ 66c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Paistatic void add_to_list(struct resource_list_x *head, 67c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai struct pci_dev *dev, struct resource *res, 68c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai resource_size_t add_size) 69568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu{ 70568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu struct resource_list_x *list = head; 71568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu struct resource_list_x *ln = list->next; 72568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu struct resource_list_x *tmp; 73568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu 74568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu tmp = kmalloc(sizeof(*tmp), GFP_KERNEL); 75568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu if (!tmp) { 76c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai pr_warning("add_to_list: kmalloc() failed!\n"); 77568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu return; 78568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu } 79568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu 80568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu tmp->next = ln; 81568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu tmp->res = res; 82568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu tmp->dev = dev; 83568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu tmp->start = res->start; 84568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu tmp->end = res->end; 85568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu tmp->flags = res->flags; 86c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai tmp->add_size = add_size; 87568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu list->next = tmp; 88568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu} 89568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu 90c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Paistatic void add_to_failed_list(struct resource_list_x *head, 91c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai struct pci_dev *dev, struct resource *res) 92c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai{ 93c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai add_to_list(head, dev, res, 0); 94c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai} 95c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai 966841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lustatic void __dev_sort_resources(struct pci_dev *dev, 976841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu struct resource_list *head) 981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 996841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu u16 class = dev->class >> 8; 1001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1016841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu /* Don't touch classless devices or host bridges or ioapics. */ 1026841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu if (class == PCI_CLASS_NOT_DEFINED || class == PCI_CLASS_BRIDGE_HOST) 1036841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu return; 1041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1056841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu /* Don't touch ioapic devices already enabled by firmware */ 1066841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu if (class == PCI_CLASS_SYSTEM_PIC) { 1076841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu u16 command; 1086841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu pci_read_config_word(dev, PCI_COMMAND, &command); 1096841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu if (command & (PCI_COMMAND_IO | PCI_COMMAND_MEMORY)) 1106841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu return; 1116841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu } 1121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1136841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu pdev_sort_resources(dev, head); 1146841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu} 11523186279658cea6d42a050400d3e79c56cb459b4Satoru Takeuchi 116fc075e1da1b96ef65c32e83648055606b8204b58Ram Paistatic inline void reset_resource(struct resource *res) 117fc075e1da1b96ef65c32e83648055606b8204b58Ram Pai{ 118fc075e1da1b96ef65c32e83648055606b8204b58Ram Pai res->start = 0; 119fc075e1da1b96ef65c32e83648055606b8204b58Ram Pai res->end = 0; 120fc075e1da1b96ef65c32e83648055606b8204b58Ram Pai res->flags = 0; 121fc075e1da1b96ef65c32e83648055606b8204b58Ram Pai} 122fc075e1da1b96ef65c32e83648055606b8204b58Ram Pai 123c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai/** 124c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * adjust_resources_sorted() - satisfy any additional resource requests 125c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * 126c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * @add_head : head of the list tracking requests requiring additional 127c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * resources 128c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * @head : head of the list tracking requests with allocated 129c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * resources 130c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * 131c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * Walk through each element of the add_head and try to procure 132c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * additional resources for the element, provided the element 133c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * is in the head list. 134c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai */ 135c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Paistatic void adjust_resources_sorted(struct resource_list_x *add_head, 136c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai struct resource_list *head) 1376841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu{ 1386841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu struct resource *res; 139c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai struct resource_list_x *list, *tmp, *prev; 140c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai struct resource_list *hlist; 141c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai resource_size_t add_size; 1426841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu int idx; 1431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 144c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai prev = add_head; 145c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai for (list = add_head->next; list;) { 1461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds res = list->res; 147c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai /* skip resource that has been reset */ 148c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai if (!res->flags) 149c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai goto out; 150c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai 151c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai /* skip this resource if not found in head list */ 152c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai for (hlist = head->next; hlist && hlist->res != res; 153c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai hlist = hlist->next); 154c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai if (!hlist) { /* just skip */ 155c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai prev = list; 156c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai list = list->next; 157c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai continue; 158c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai } 159c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai 1601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds idx = res - &list->dev->resource[0]; 161c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai add_size=list->add_size; 162c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai if (!resource_size(res) && add_size) { 163c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai res->end = res->start + add_size - 1; 164c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai if(pci_assign_resource(list->dev, idx)) 165c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai reset_resource(res); 166c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai } else if (add_size) { 167c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai adjust_resource(res, res->start, 168c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai resource_size(res) + add_size); 169c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai } 170c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Paiout: 171c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai tmp = list; 172c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai prev->next = list = list->next; 173c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai kfree(tmp); 174c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai } 175c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai} 176c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai 177c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai/** 178c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * assign_requested_resources_sorted() - satisfy resource requests 179c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * 180c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * @head : head of the list tracking requests for resources 181c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * @failed_list : head of the list tracking requests that could 182c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * not be allocated 183c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * 184c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * Satisfy resource requests of each element in the list. Add 185c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * requests that could not satisfied to the failed_list. 186c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai */ 187c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Paistatic void assign_requested_resources_sorted(struct resource_list *head, 188c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai struct resource_list_x *fail_head) 189c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai{ 190c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai struct resource *res; 191c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai struct resource_list *list; 192c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai int idx; 1939a928660c9dcaff568c9d379655c5aa16fb981f8Yinghai Lu 194c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai for (list = head->next; list; list = list->next) { 195c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai res = list->res; 196c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai idx = res - &list->dev->resource[0]; 197c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai if (resource_size(res) && pci_assign_resource(list->dev, idx)) { 1989a928660c9dcaff568c9d379655c5aa16fb981f8Yinghai Lu if (fail_head && !pci_is_root_bus(list->dev->bus)) { 1999a928660c9dcaff568c9d379655c5aa16fb981f8Yinghai Lu /* 2009a928660c9dcaff568c9d379655c5aa16fb981f8Yinghai Lu * if the failed res is for ROM BAR, and it will 2019a928660c9dcaff568c9d379655c5aa16fb981f8Yinghai Lu * be enabled later, don't add it to the list 2029a928660c9dcaff568c9d379655c5aa16fb981f8Yinghai Lu */ 2039a928660c9dcaff568c9d379655c5aa16fb981f8Yinghai Lu if (!((idx == PCI_ROM_RESOURCE) && 2049a928660c9dcaff568c9d379655c5aa16fb981f8Yinghai Lu (!(res->flags & IORESOURCE_ROM_ENABLE)))) 2059a928660c9dcaff568c9d379655c5aa16fb981f8Yinghai Lu add_to_failed_list(fail_head, list->dev, res); 2069a928660c9dcaff568c9d379655c5aa16fb981f8Yinghai Lu } 207fc075e1da1b96ef65c32e83648055606b8204b58Ram Pai reset_resource(res); 208542df5de56a23bf2d94b75e2b304ab0e5a5508a8Rajesh Shah } 2091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 2101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 2111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 212c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Paistatic void __assign_resources_sorted(struct resource_list *head, 213c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai struct resource_list_x *add_head, 214c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai struct resource_list_x *fail_head) 215c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai{ 216c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai /* Satisfy the must-have resource requests */ 217c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai assign_requested_resources_sorted(head, fail_head); 218c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai 219c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai /* Try to satisfy any additional nice-to-have resource 220c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai requests */ 221c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai if (add_head) 222c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai adjust_resources_sorted(add_head, head); 223c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai free_list(resource_list, head); 224c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai} 225c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai 2266841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lustatic void pdev_assign_resources_sorted(struct pci_dev *dev, 2276841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu struct resource_list_x *fail_head) 2286841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu{ 2296841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu struct resource_list head; 2306841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu 2316841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu head.next = NULL; 2326841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu __dev_sort_resources(dev, &head); 233c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai __assign_resources_sorted(&head, NULL, fail_head); 2346841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu 2356841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu} 2366841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu 2376841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lustatic void pbus_assign_resources_sorted(const struct pci_bus *bus, 238c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai struct resource_list_x *add_head, 2396841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu struct resource_list_x *fail_head) 2406841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu{ 2416841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu struct pci_dev *dev; 2426841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu struct resource_list head; 2436841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu 2446841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu head.next = NULL; 2456841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu list_for_each_entry(dev, &bus->devices, bus_list) 2466841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu __dev_sort_resources(dev, &head); 2476841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu 248c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai __assign_resources_sorted(&head, add_head, fail_head); 2496841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu} 2506841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu 251b3743fa4442fc172e950ff0eaf6aa96e7d5ce9beDominik Brodowskivoid pci_setup_cardbus(struct pci_bus *bus) 2521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 2531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct pci_dev *bridge = bus->self; 254c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas struct resource *res; 2551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct pci_bus_region region; 2561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 257865df576e8fc70daf297b53e61a4fbefc719d065Bjorn Helgaas dev_info(&bridge->dev, "CardBus bridge to [bus %02x-%02x]\n", 258865df576e8fc70daf297b53e61a4fbefc719d065Bjorn Helgaas bus->secondary, bus->subordinate); 2591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 260c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas res = bus->resource[0]; 261c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas pcibios_resource_to_bus(bridge, ®ion, res); 262c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas if (res->flags & IORESOURCE_IO) { 2631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* 2641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * The IO resource is allocated a range twice as large as it 2651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * would normally need. This allows us to set both IO regs. 2661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 267c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas dev_info(&bridge->dev, " bridge window %pR\n", res); 2681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_write_config_dword(bridge, PCI_CB_IO_BASE_0, 2691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds region.start); 2701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_write_config_dword(bridge, PCI_CB_IO_LIMIT_0, 2711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds region.end); 2721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 2731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 274c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas res = bus->resource[1]; 275c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas pcibios_resource_to_bus(bridge, ®ion, res); 276c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas if (res->flags & IORESOURCE_IO) { 277c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas dev_info(&bridge->dev, " bridge window %pR\n", res); 2781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_write_config_dword(bridge, PCI_CB_IO_BASE_1, 2791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds region.start); 2801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_write_config_dword(bridge, PCI_CB_IO_LIMIT_1, 2811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds region.end); 2821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 2831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 284c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas res = bus->resource[2]; 285c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas pcibios_resource_to_bus(bridge, ®ion, res); 286c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas if (res->flags & IORESOURCE_MEM) { 287c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas dev_info(&bridge->dev, " bridge window %pR\n", res); 2881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_write_config_dword(bridge, PCI_CB_MEMORY_BASE_0, 2891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds region.start); 2901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_write_config_dword(bridge, PCI_CB_MEMORY_LIMIT_0, 2911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds region.end); 2921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 2931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 294c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas res = bus->resource[3]; 295c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas pcibios_resource_to_bus(bridge, ®ion, res); 296c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas if (res->flags & IORESOURCE_MEM) { 297c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas dev_info(&bridge->dev, " bridge window %pR\n", res); 2981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_write_config_dword(bridge, PCI_CB_MEMORY_BASE_1, 2991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds region.start); 3001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_write_config_dword(bridge, PCI_CB_MEMORY_LIMIT_1, 3011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds region.end); 3021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 3031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 304b3743fa4442fc172e950ff0eaf6aa96e7d5ce9beDominik BrodowskiEXPORT_SYMBOL(pci_setup_cardbus); 3051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* Initialize bridges with base/limit values we have collected. 3071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds PCI-to-PCI Bridge Architecture Specification rev. 1.1 (1998) 3081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds requires that if there is no I/O ports or memory behind the 3091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bridge, corresponding range must be turned off by writing base 3101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds value greater than limit to the bridge's base/limit registers. 3111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds Note: care must be taken when updating I/O base/limit registers 3131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds of bridges which support 32-bit I/O. This update requires two 3141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds config space writes, so it's quite possible that an I/O window of 3151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds the bridge will have some undesirable address (e.g. 0) after the 3161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds first write. Ditto 64-bit prefetchable MMIO. */ 3177cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lustatic void pci_setup_bridge_io(struct pci_bus *bus) 3181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 3191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct pci_dev *bridge = bus->self; 320c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas struct resource *res; 3211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct pci_bus_region region; 3227cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu u32 l, io_upper16; 3231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Set up the top and bottom of the PCI I/O segment for this bus. */ 325c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas res = bus->resource[0]; 326c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas pcibios_resource_to_bus(bridge, ®ion, res); 327c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas if (res->flags & IORESOURCE_IO) { 3281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_read_config_dword(bridge, PCI_IO_BASE, &l); 3291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds l &= 0xffff0000; 3301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds l |= (region.start >> 8) & 0x00f0; 3311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds l |= region.end & 0xf000; 3321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Set up upper 16 bits of I/O base/limit. */ 3331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds io_upper16 = (region.end & 0xffff0000) | (region.start >> 16); 334c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas dev_info(&bridge->dev, " bridge window %pR\n", res); 3357cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu } else { 3361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Clear upper 16 bits of I/O base/limit. */ 3371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds io_upper16 = 0; 3381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds l = 0x00f0; 339c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas dev_info(&bridge->dev, " bridge window [io disabled]\n"); 3401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 3411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Temporarily disable the I/O range before updating PCI_IO_BASE. */ 3421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_write_config_dword(bridge, PCI_IO_BASE_UPPER16, 0x0000ffff); 3431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Update lower 16 bits of I/O base/limit. */ 3441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_write_config_dword(bridge, PCI_IO_BASE, l); 3451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Update upper 16 bits of I/O base/limit. */ 3461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_write_config_dword(bridge, PCI_IO_BASE_UPPER16, io_upper16); 3477cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu} 3487cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu 3497cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lustatic void pci_setup_bridge_mmio(struct pci_bus *bus) 3507cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu{ 3517cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu struct pci_dev *bridge = bus->self; 3527cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu struct resource *res; 3537cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu struct pci_bus_region region; 3547cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu u32 l; 3551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3567cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu /* Set up the top and bottom of the PCI Memory segment for this bus. */ 357c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas res = bus->resource[1]; 358c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas pcibios_resource_to_bus(bridge, ®ion, res); 359c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas if (res->flags & IORESOURCE_MEM) { 3601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds l = (region.start >> 16) & 0xfff0; 3611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds l |= region.end & 0xfff00000; 362c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas dev_info(&bridge->dev, " bridge window %pR\n", res); 3637cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu } else { 3641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds l = 0x0000fff0; 365c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas dev_info(&bridge->dev, " bridge window [mem disabled]\n"); 3661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 3671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_write_config_dword(bridge, PCI_MEMORY_BASE, l); 3687cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu} 3697cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu 3707cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lustatic void pci_setup_bridge_mmio_pref(struct pci_bus *bus) 3717cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu{ 3727cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu struct pci_dev *bridge = bus->self; 3737cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu struct resource *res; 3747cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu struct pci_bus_region region; 3757cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu u32 l, bu, lu; 3761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Clear out the upper 32 bits of PREF limit. 3781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds If PCI_PREF_BASE_UPPER32 was non-zero, this temporarily 3791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds disables PREF range, which is ok. */ 3801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_write_config_dword(bridge, PCI_PREF_LIMIT_UPPER32, 0); 3811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Set up PREF base/limit. */ 383c40a22e0ce5eb400f27449e59e43d021bee58b8dBenjamin Herrenschmidt bu = lu = 0; 384c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas res = bus->resource[2]; 385c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas pcibios_resource_to_bus(bridge, ®ion, res); 386c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas if (res->flags & IORESOURCE_PREFETCH) { 3871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds l = (region.start >> 16) & 0xfff0; 3881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds l |= region.end & 0xfff00000; 389c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas if (res->flags & IORESOURCE_MEM_64) { 3901f82de10d6b1d845155363c895c552e61b36b51aYinghai Lu bu = upper_32_bits(region.start); 3911f82de10d6b1d845155363c895c552e61b36b51aYinghai Lu lu = upper_32_bits(region.end); 3921f82de10d6b1d845155363c895c552e61b36b51aYinghai Lu } 393c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas dev_info(&bridge->dev, " bridge window %pR\n", res); 3947cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu } else { 3951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds l = 0x0000fff0; 396c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas dev_info(&bridge->dev, " bridge window [mem pref disabled]\n"); 3971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 3981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_write_config_dword(bridge, PCI_PREF_MEMORY_BASE, l); 3991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 40059353ea30e65ab3ae181d6175e3212e1361c3787Alex Williamson /* Set the upper 32 bits of PREF base & limit. */ 40159353ea30e65ab3ae181d6175e3212e1361c3787Alex Williamson pci_write_config_dword(bridge, PCI_PREF_BASE_UPPER32, bu); 40259353ea30e65ab3ae181d6175e3212e1361c3787Alex Williamson pci_write_config_dword(bridge, PCI_PREF_LIMIT_UPPER32, lu); 4037cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu} 4047cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu 4057cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lustatic void __pci_setup_bridge(struct pci_bus *bus, unsigned long type) 4067cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu{ 4077cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu struct pci_dev *bridge = bus->self; 4087cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu 4097cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu dev_info(&bridge->dev, "PCI bridge to [bus %02x-%02x]\n", 4107cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu bus->secondary, bus->subordinate); 4117cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu 4127cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu if (type & IORESOURCE_IO) 4137cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu pci_setup_bridge_io(bus); 4147cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu 4157cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu if (type & IORESOURCE_MEM) 4167cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu pci_setup_bridge_mmio(bus); 4177cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu 4187cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu if (type & IORESOURCE_PREFETCH) 4197cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu pci_setup_bridge_mmio_pref(bus); 4201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_write_config_word(bridge, PCI_BRIDGE_CONTROL, bus->bridge_ctl); 4221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 4231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4247cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lustatic void pci_setup_bridge(struct pci_bus *bus) 4257cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu{ 4267cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu unsigned long type = IORESOURCE_IO | IORESOURCE_MEM | 4277cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu IORESOURCE_PREFETCH; 4287cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu 4297cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu __pci_setup_bridge(bus, type); 4307cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu} 4317cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu 4321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* Check whether the bridge supports optional I/O and 4331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds prefetchable memory ranges. If not, the respective 4341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds base/limit registers must be read-only and read as 0. */ 43596bde06a2df1b363206d3cdef53134b84ff37813Sam Ravnborgstatic void pci_bridge_check_ranges(struct pci_bus *bus) 4361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 4371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u16 io; 4381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u32 pmem; 4391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct pci_dev *bridge = bus->self; 4401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct resource *b_res; 4411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds b_res = &bridge->resource[PCI_BRIDGE_RESOURCES]; 4431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds b_res[1].flags |= IORESOURCE_MEM; 4441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_read_config_word(bridge, PCI_IO_BASE, &io); 4461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!io) { 4471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_write_config_word(bridge, PCI_IO_BASE, 0xf0f0); 4481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_read_config_word(bridge, PCI_IO_BASE, &io); 4491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_write_config_word(bridge, PCI_IO_BASE, 0x0); 4501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 4511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (io) 4521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds b_res[0].flags |= IORESOURCE_IO; 4531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* DECchip 21050 pass 2 errata: the bridge may miss an address 4541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds disconnect boundary by one PCI data phase. 4551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds Workaround: do not use prefetching on this device. */ 4561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (bridge->vendor == PCI_VENDOR_ID_DEC && bridge->device == 0x0001) 4571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return; 4581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_read_config_dword(bridge, PCI_PREF_MEMORY_BASE, &pmem); 4591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!pmem) { 4601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_write_config_dword(bridge, PCI_PREF_MEMORY_BASE, 4611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0xfff0fff0); 4621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_read_config_dword(bridge, PCI_PREF_MEMORY_BASE, &pmem); 4631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_write_config_dword(bridge, PCI_PREF_MEMORY_BASE, 0x0); 4641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 4651f82de10d6b1d845155363c895c552e61b36b51aYinghai Lu if (pmem) { 4661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds b_res[2].flags |= IORESOURCE_MEM | IORESOURCE_PREFETCH; 4679958610552c0bd7558b41cb8addbd865587f142aYinghai Lu if ((pmem & PCI_PREF_RANGE_TYPE_MASK) == 4689958610552c0bd7558b41cb8addbd865587f142aYinghai Lu PCI_PREF_RANGE_TYPE_64) { 4691f82de10d6b1d845155363c895c552e61b36b51aYinghai Lu b_res[2].flags |= IORESOURCE_MEM_64; 4709958610552c0bd7558b41cb8addbd865587f142aYinghai Lu b_res[2].flags |= PCI_PREF_RANGE_TYPE_64; 4719958610552c0bd7558b41cb8addbd865587f142aYinghai Lu } 4721f82de10d6b1d845155363c895c552e61b36b51aYinghai Lu } 4731f82de10d6b1d845155363c895c552e61b36b51aYinghai Lu 4741f82de10d6b1d845155363c895c552e61b36b51aYinghai Lu /* double check if bridge does support 64 bit pref */ 4751f82de10d6b1d845155363c895c552e61b36b51aYinghai Lu if (b_res[2].flags & IORESOURCE_MEM_64) { 4761f82de10d6b1d845155363c895c552e61b36b51aYinghai Lu u32 mem_base_hi, tmp; 4771f82de10d6b1d845155363c895c552e61b36b51aYinghai Lu pci_read_config_dword(bridge, PCI_PREF_BASE_UPPER32, 4781f82de10d6b1d845155363c895c552e61b36b51aYinghai Lu &mem_base_hi); 4791f82de10d6b1d845155363c895c552e61b36b51aYinghai Lu pci_write_config_dword(bridge, PCI_PREF_BASE_UPPER32, 4801f82de10d6b1d845155363c895c552e61b36b51aYinghai Lu 0xffffffff); 4811f82de10d6b1d845155363c895c552e61b36b51aYinghai Lu pci_read_config_dword(bridge, PCI_PREF_BASE_UPPER32, &tmp); 4821f82de10d6b1d845155363c895c552e61b36b51aYinghai Lu if (!tmp) 4831f82de10d6b1d845155363c895c552e61b36b51aYinghai Lu b_res[2].flags &= ~IORESOURCE_MEM_64; 4841f82de10d6b1d845155363c895c552e61b36b51aYinghai Lu pci_write_config_dword(bridge, PCI_PREF_BASE_UPPER32, 4851f82de10d6b1d845155363c895c552e61b36b51aYinghai Lu mem_base_hi); 4861f82de10d6b1d845155363c895c552e61b36b51aYinghai Lu } 4871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 4881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* Helper function for sizing routines: find first available 4901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bus resource of a given type. Note: we intentionally skip 4911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds the bus resources which have already been assigned (that is, 4921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds have non-NULL parent resource). */ 49396bde06a2df1b363206d3cdef53134b84ff37813Sam Ravnborgstatic struct resource *find_free_bus_resource(struct pci_bus *bus, unsigned long type) 4941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 4951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int i; 4961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct resource *r; 4971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long type_mask = IORESOURCE_IO | IORESOURCE_MEM | 4981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds IORESOURCE_PREFETCH; 4991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 50089a74ecccd1f78e51faf6287e5c0e93a92ac096eBjorn Helgaas pci_bus_for_each_resource(bus, r, i) { 501299de0343c7d18448a69c635378342e9214b14afIvan Kokshaysky if (r == &ioport_resource || r == &iomem_resource) 502299de0343c7d18448a69c635378342e9214b14afIvan Kokshaysky continue; 50355a1098476619d5d8f4cdae7240ea759274dead7Jesse Barnes if (r && (r->flags & type_mask) == type && !r->parent) 50455a1098476619d5d8f4cdae7240ea759274dead7Jesse Barnes return r; 5051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 5061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return NULL; 5071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 5081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 50913583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Paistatic resource_size_t calculate_iosize(resource_size_t size, 51013583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai resource_size_t min_size, 51113583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai resource_size_t size1, 51213583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai resource_size_t old_size, 51313583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai resource_size_t align) 51413583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai{ 51513583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai if (size < min_size) 51613583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai size = min_size; 51713583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai if (old_size == 1 ) 51813583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai old_size = 0; 51913583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai /* To be fixed in 2.5: we should have sort of HAVE_ISA 52013583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai flag in the struct pci_bus. */ 52113583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai#if defined(CONFIG_ISA) || defined(CONFIG_EISA) 52213583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai size = (size & 0xff) + ((size & ~0xffUL) << 2); 52313583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai#endif 52413583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai size = ALIGN(size + size1, align); 52513583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai if (size < old_size) 52613583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai size = old_size; 52713583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai return size; 52813583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai} 52913583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai 53013583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Paistatic resource_size_t calculate_memsize(resource_size_t size, 53113583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai resource_size_t min_size, 53213583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai resource_size_t size1, 53313583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai resource_size_t old_size, 53413583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai resource_size_t align) 53513583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai{ 53613583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai if (size < min_size) 53713583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai size = min_size; 53813583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai if (old_size == 1 ) 53913583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai old_size = 0; 54013583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai if (size < old_size) 54113583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai size = old_size; 54213583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai size = ALIGN(size + size1, align); 54313583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai return size; 54413583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai} 54513583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai 546c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai/** 547c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * pbus_size_io() - size the io window of a given bus 548c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * 549c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * @bus : the bus 550c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * @min_size : the minimum io window that must to be allocated 551c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * @add_size : additional optional io window 552c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * @add_head : track the additional io window on this list 553c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * 554c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * Sizing the IO windows of the PCI-PCI bridge is trivial, 555c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * since these windows have 4K granularity and the IO ranges 556c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * of non-bridge PCI devices are limited to 256 bytes. 557c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * We must be careful with the ISA aliasing though. 558c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai */ 559c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Paistatic void pbus_size_io(struct pci_bus *bus, resource_size_t min_size, 560c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai resource_size_t add_size, struct resource_list_x *add_head) 5611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 5621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct pci_dev *dev; 5631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct resource *b_res = find_free_bus_resource(bus, IORESOURCE_IO); 564c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai unsigned long size = 0, size0 = 0, size1 = 0; 5651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!b_res) 5671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return; 5681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds list_for_each_entry(dev, &bus->devices, bus_list) { 5701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int i; 5711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (i = 0; i < PCI_NUM_RESOURCES; i++) { 5731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct resource *r = &dev->resource[i]; 5741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long r_size; 5751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (r->parent || !(r->flags & IORESOURCE_IO)) 5771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds continue; 578022edd86d7c864bc8fadc3c8ac4e6a464472ab05Zhao, Yu r_size = resource_size(r); 5791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (r_size < 0x400) 5811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Might be re-aligned for ISA */ 5821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds size += r_size; 5831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 5841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds size1 += r_size; 5851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 5861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 587c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai size0 = calculate_iosize(size, min_size, size1, 588c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai resource_size(b_res), 4096); 58993d2175d3d31f11ba04fcfa0e9a496a1b4bc8b34Yinghai Lu size1 = (!add_head || (add_head && !add_size)) ? size0 : 590c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai calculate_iosize(size, min_size+add_size, size1, 59113583b16592a9a85093dd9aa3d4e8cd76e4f0cd4Ram Pai resource_size(b_res), 4096); 592c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai if (!size0 && !size1) { 593865df576e8fc70daf297b53e61a4fbefc719d065Bjorn Helgaas if (b_res->start || b_res->end) 594865df576e8fc70daf297b53e61a4fbefc719d065Bjorn Helgaas dev_info(&bus->self->dev, "disabling bridge window " 595865df576e8fc70daf297b53e61a4fbefc719d065Bjorn Helgaas "%pR to [bus %02x-%02x] (unused)\n", b_res, 596865df576e8fc70daf297b53e61a4fbefc719d065Bjorn Helgaas bus->secondary, bus->subordinate); 5971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds b_res->flags = 0; 5981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return; 5991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 6001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Alignment of the IO window is always 4K */ 6011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds b_res->start = 4096; 602c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai b_res->end = b_res->start + size0 - 1; 603884525655d07fdee9245716b998ecdc45cdd8007Ivan Kokshaysky b_res->flags |= IORESOURCE_STARTALIGN; 604c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai if (size1 > size0 && add_head) 605c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai add_to_list(add_head, bus->self, b_res, size1-size0); 6061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 6071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 608c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai/** 609c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * pbus_size_mem() - size the memory window of a given bus 610c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * 611c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * @bus : the bus 612c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * @min_size : the minimum memory window that must to be allocated 613c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * @add_size : additional optional memory window 614c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * @add_head : track the additional memory window on this list 615c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * 616c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * Calculate the size of the bus and minimal alignment which 617c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * guarantees that all child resources fit in this size. 618c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai */ 61928760489a3f1e136c5ae8581c0fa8f63511f2f4cEric W. Biedermanstatic int pbus_size_mem(struct pci_bus *bus, unsigned long mask, 620c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai unsigned long type, resource_size_t min_size, 621c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai resource_size_t add_size, 622c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai struct resource_list_x *add_head) 6231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 6241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct pci_dev *dev; 625c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai resource_size_t min_align, align, size, size0, size1; 626c40a22e0ce5eb400f27449e59e43d021bee58b8dBenjamin Herrenschmidt resource_size_t aligns[12]; /* Alignments from 1Mb to 2Gb */ 6271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int order, max_order; 6281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct resource *b_res = find_free_bus_resource(bus, type); 6291f82de10d6b1d845155363c895c552e61b36b51aYinghai Lu unsigned int mem64_mask = 0; 6301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!b_res) 6321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 6331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds memset(aligns, 0, sizeof(aligns)); 6351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds max_order = 0; 6361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds size = 0; 6371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6381f82de10d6b1d845155363c895c552e61b36b51aYinghai Lu mem64_mask = b_res->flags & IORESOURCE_MEM_64; 6391f82de10d6b1d845155363c895c552e61b36b51aYinghai Lu b_res->flags &= ~IORESOURCE_MEM_64; 6401f82de10d6b1d845155363c895c552e61b36b51aYinghai Lu 6411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds list_for_each_entry(dev, &bus->devices, bus_list) { 6421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int i; 6431f82de10d6b1d845155363c895c552e61b36b51aYinghai Lu 6441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (i = 0; i < PCI_NUM_RESOURCES; i++) { 6451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct resource *r = &dev->resource[i]; 646c40a22e0ce5eb400f27449e59e43d021bee58b8dBenjamin Herrenschmidt resource_size_t r_size; 6471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (r->parent || (r->flags & mask) != type) 6491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds continue; 650022edd86d7c864bc8fadc3c8ac4e6a464472ab05Zhao, Yu r_size = resource_size(r); 6511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* For bridges size != alignment */ 6526faf17f6f1ffc586d16efc2f9fa2083a7785ee74Chris Wright align = pci_resource_alignment(dev, r); 6531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds order = __ffs(align) - 20; 6541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (order > 11) { 655865df576e8fc70daf297b53e61a4fbefc719d065Bjorn Helgaas dev_warn(&dev->dev, "disabling BAR %d: %pR " 656865df576e8fc70daf297b53e61a4fbefc719d065Bjorn Helgaas "(bad alignment %#llx)\n", i, r, 657865df576e8fc70daf297b53e61a4fbefc719d065Bjorn Helgaas (unsigned long long) align); 6581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds r->flags = 0; 6591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds continue; 6601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 6611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds size += r_size; 6621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (order < 0) 6631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds order = 0; 6641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Exclude ranges with size > align from 6651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds calculation of the alignment. */ 6661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (r_size == align) 6671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds aligns[order] += align; 6681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (order > max_order) 6691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds max_order = order; 6701f82de10d6b1d845155363c895c552e61b36b51aYinghai Lu mem64_mask &= r->flags & IORESOURCE_MEM_64; 6711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 6721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 6731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds align = 0; 6741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds min_align = 0; 6751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (order = 0; order <= max_order; order++) { 6768308c54d7e312f7a03e2ce2057d0837e6fe3843fJeremy Fitzhardinge resource_size_t align1 = 1; 6778308c54d7e312f7a03e2ce2057d0837e6fe3843fJeremy Fitzhardinge 6788308c54d7e312f7a03e2ce2057d0837e6fe3843fJeremy Fitzhardinge align1 <<= (order + 20); 6798308c54d7e312f7a03e2ce2057d0837e6fe3843fJeremy Fitzhardinge 6801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!align) 6811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds min_align = align1; 6826f6f8c2f4b59711857d14ada8e70309d52e8fae4Milind Arun Choudhary else if (ALIGN(align + min_align, min_align) < align1) 6831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds min_align = align1 >> 1; 6841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds align += aligns[order]; 6851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 686b42282e5a05018ecdc0d63a4ad530b0999785912Linus Torvalds size0 = calculate_memsize(size, min_size, 0, resource_size(b_res), min_align); 68793d2175d3d31f11ba04fcfa0e9a496a1b4bc8b34Yinghai Lu size1 = (!add_head || (add_head && !add_size)) ? size0 : 688c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai calculate_memsize(size, min_size+add_size, 0, 689b42282e5a05018ecdc0d63a4ad530b0999785912Linus Torvalds resource_size(b_res), min_align); 690c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai if (!size0 && !size1) { 691865df576e8fc70daf297b53e61a4fbefc719d065Bjorn Helgaas if (b_res->start || b_res->end) 692865df576e8fc70daf297b53e61a4fbefc719d065Bjorn Helgaas dev_info(&bus->self->dev, "disabling bridge window " 693865df576e8fc70daf297b53e61a4fbefc719d065Bjorn Helgaas "%pR to [bus %02x-%02x] (unused)\n", b_res, 694865df576e8fc70daf297b53e61a4fbefc719d065Bjorn Helgaas bus->secondary, bus->subordinate); 6951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds b_res->flags = 0; 6961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 1; 6971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 6981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds b_res->start = min_align; 699c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai b_res->end = size0 + min_align - 1; 700c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai b_res->flags |= IORESOURCE_STARTALIGN | mem64_mask; 701c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai if (size1 > size0 && add_head) 702c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai add_to_list(add_head, bus->self, b_res, size1-size0); 7031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 1; 7041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 7051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7065468ae617035f06ae1e07c264d6cdfcd721b539fAdrian Bunkstatic void pci_bus_size_cardbus(struct pci_bus *bus) 7071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 7081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct pci_dev *bridge = bus->self; 7091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct resource *b_res = &bridge->resource[PCI_BRIDGE_RESOURCES]; 7101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u16 ctrl; 7111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* 7131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Reserve some resources for CardBus. We reserve 7141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * a fixed amount of bus space for CardBus bridges. 7151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 716934b7024f0ed29003c95cef447d92737ab86dc4fLinus Torvalds b_res[0].start = 0; 717934b7024f0ed29003c95cef447d92737ab86dc4fLinus Torvalds b_res[0].end = pci_cardbus_io_size - 1; 718934b7024f0ed29003c95cef447d92737ab86dc4fLinus Torvalds b_res[0].flags |= IORESOURCE_IO | IORESOURCE_SIZEALIGN; 7191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 720934b7024f0ed29003c95cef447d92737ab86dc4fLinus Torvalds b_res[1].start = 0; 721934b7024f0ed29003c95cef447d92737ab86dc4fLinus Torvalds b_res[1].end = pci_cardbus_io_size - 1; 722934b7024f0ed29003c95cef447d92737ab86dc4fLinus Torvalds b_res[1].flags |= IORESOURCE_IO | IORESOURCE_SIZEALIGN; 7231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* 7251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Check whether prefetchable memory is supported 7261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * by this bridge. 7271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 7281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_read_config_word(bridge, PCI_CB_BRIDGE_CONTROL, &ctrl); 7291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!(ctrl & PCI_CB_BRIDGE_CTL_PREFETCH_MEM0)) { 7301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ctrl |= PCI_CB_BRIDGE_CTL_PREFETCH_MEM0; 7311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_write_config_word(bridge, PCI_CB_BRIDGE_CONTROL, ctrl); 7321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_read_config_word(bridge, PCI_CB_BRIDGE_CONTROL, &ctrl); 7331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 7341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* 7361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * If we have prefetchable memory support, allocate 7371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * two regions. Otherwise, allocate one region of 7381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * twice the size. 7391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 7401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (ctrl & PCI_CB_BRIDGE_CTL_PREFETCH_MEM0) { 741934b7024f0ed29003c95cef447d92737ab86dc4fLinus Torvalds b_res[2].start = 0; 742934b7024f0ed29003c95cef447d92737ab86dc4fLinus Torvalds b_res[2].end = pci_cardbus_mem_size - 1; 743934b7024f0ed29003c95cef447d92737ab86dc4fLinus Torvalds b_res[2].flags |= IORESOURCE_MEM | IORESOURCE_PREFETCH | IORESOURCE_SIZEALIGN; 7441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 745934b7024f0ed29003c95cef447d92737ab86dc4fLinus Torvalds b_res[3].start = 0; 746934b7024f0ed29003c95cef447d92737ab86dc4fLinus Torvalds b_res[3].end = pci_cardbus_mem_size - 1; 747934b7024f0ed29003c95cef447d92737ab86dc4fLinus Torvalds b_res[3].flags |= IORESOURCE_MEM | IORESOURCE_SIZEALIGN; 7481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else { 749934b7024f0ed29003c95cef447d92737ab86dc4fLinus Torvalds b_res[3].start = 0; 750934b7024f0ed29003c95cef447d92737ab86dc4fLinus Torvalds b_res[3].end = pci_cardbus_mem_size * 2 - 1; 751934b7024f0ed29003c95cef447d92737ab86dc4fLinus Torvalds b_res[3].flags |= IORESOURCE_MEM | IORESOURCE_SIZEALIGN; 7521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 7531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 7541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 755c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Paivoid __ref __pci_bus_size_bridges(struct pci_bus *bus, 756c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai struct resource_list_x *add_head) 7571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 7581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct pci_dev *dev; 7591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long mask, prefmask; 760c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai resource_size_t additional_mem_size = 0, additional_io_size = 0; 7611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds list_for_each_entry(dev, &bus->devices, bus_list) { 7631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct pci_bus *b = dev->subordinate; 7641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!b) 7651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds continue; 7661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds switch (dev->class >> 8) { 7681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case PCI_CLASS_BRIDGE_CARDBUS: 7691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_bus_size_cardbus(b); 7701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 7711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case PCI_CLASS_BRIDGE_PCI: 7731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds default: 774c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai __pci_bus_size_bridges(b, add_head); 7751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 7761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 7771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 7781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* The root bus? */ 7801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!bus->self) 7811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return; 7821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds switch (bus->self->class >> 8) { 7841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case PCI_CLASS_BRIDGE_CARDBUS: 7851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* don't size cardbuses yet. */ 7861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 7871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case PCI_CLASS_BRIDGE_PCI: 7891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_bridge_check_ranges(bus); 79028760489a3f1e136c5ae8581c0fa8f63511f2f4cEric W. Biederman if (bus->self->is_hotplug_bridge) { 791c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai additional_io_size = pci_hotplug_io_size; 792c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai additional_mem_size = pci_hotplug_mem_size; 79328760489a3f1e136c5ae8581c0fa8f63511f2f4cEric W. Biederman } 794c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai /* 795c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai * Follow thru 796c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai */ 7971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds default: 798c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai pbus_size_io(bus, 0, additional_io_size, add_head); 7991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* If the bridge supports prefetchable range, size it 8001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds separately. If it doesn't, or its prefetchable window 8011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds has already been allocated by arch code, try 8021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds non-prefetchable range for both types of PCI memory 8031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds resources. */ 8041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mask = IORESOURCE_MEM; 8051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds prefmask = IORESOURCE_MEM | IORESOURCE_PREFETCH; 806c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai if (pbus_size_mem(bus, prefmask, prefmask, 0, additional_mem_size, add_head)) 8071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mask = prefmask; /* Success, size non-prefetch only. */ 80828760489a3f1e136c5ae8581c0fa8f63511f2f4cEric W. Biederman else 809c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai additional_mem_size += additional_mem_size; 810c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai pbus_size_mem(bus, mask, IORESOURCE_MEM, 0, additional_mem_size, add_head); 8111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 8121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 8131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 814c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai 815c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Paivoid __ref pci_bus_size_bridges(struct pci_bus *bus) 816c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai{ 817c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai __pci_bus_size_bridges(bus, NULL); 818c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai} 8191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL(pci_bus_size_bridges); 8201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 821568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lustatic void __ref __pci_bus_assign_resources(const struct pci_bus *bus, 822c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai struct resource_list_x *add_head, 823568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu struct resource_list_x *fail_head) 8241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 8251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct pci_bus *b; 8261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct pci_dev *dev; 8271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 828c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai pbus_assign_resources_sorted(bus, add_head, fail_head); 8291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds list_for_each_entry(dev, &bus->devices, bus_list) { 8311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds b = dev->subordinate; 8321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!b) 8331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds continue; 8341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 835c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai __pci_bus_assign_resources(b, add_head, fail_head); 8361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds switch (dev->class >> 8) { 8381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case PCI_CLASS_BRIDGE_PCI: 8396841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu if (!pci_is_enabled(dev)) 8406841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu pci_setup_bridge(b); 8411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 8421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case PCI_CLASS_BRIDGE_CARDBUS: 8441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_setup_cardbus(b); 8451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 8461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds default: 84880ccba1186d48fa728dc4b1456cc07ffb07da501Bjorn Helgaas dev_info(&dev->dev, "not setting up bridge for bus " 84980ccba1186d48fa728dc4b1456cc07ffb07da501Bjorn Helgaas "%04x:%02x\n", pci_domain_nr(b), b->number); 8501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 8511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 8521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 8531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 854568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu 855568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Luvoid __ref pci_bus_assign_resources(const struct pci_bus *bus) 856568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu{ 857c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai __pci_bus_assign_resources(bus, NULL, NULL); 858568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu} 8591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL(pci_bus_assign_resources); 8601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8616841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lustatic void __ref __pci_bridge_assign_resources(const struct pci_dev *bridge, 8626841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu struct resource_list_x *fail_head) 8636841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu{ 8646841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu struct pci_bus *b; 8656841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu 8666841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu pdev_assign_resources_sorted((struct pci_dev *)bridge, fail_head); 8676841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu 8686841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu b = bridge->subordinate; 8696841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu if (!b) 8706841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu return; 8716841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu 872c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai __pci_bus_assign_resources(b, NULL, fail_head); 8736841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu 8746841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu switch (bridge->class >> 8) { 8756841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu case PCI_CLASS_BRIDGE_PCI: 8766841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu pci_setup_bridge(b); 8776841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu break; 8786841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu 8796841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu case PCI_CLASS_BRIDGE_CARDBUS: 8806841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu pci_setup_cardbus(b); 8816841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu break; 8826841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu 8836841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu default: 8846841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu dev_info(&bridge->dev, "not setting up bridge for bus " 8856841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu "%04x:%02x\n", pci_domain_nr(b), b->number); 8866841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu break; 8876841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu } 8886841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu} 8895009b46025acb2d3955d2c93574604fba667ef39Yinghai Lustatic void pci_bridge_release_resources(struct pci_bus *bus, 8905009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu unsigned long type) 8915009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu{ 8925009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu int idx; 8935009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu bool changed = false; 8945009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu struct pci_dev *dev; 8955009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu struct resource *r; 8965009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu unsigned long type_mask = IORESOURCE_IO | IORESOURCE_MEM | 8975009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu IORESOURCE_PREFETCH; 8985009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu 8995009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu dev = bus->self; 9005009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu for (idx = PCI_BRIDGE_RESOURCES; idx <= PCI_BRIDGE_RESOURCE_END; 9015009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu idx++) { 9025009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu r = &dev->resource[idx]; 9035009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu if ((r->flags & type_mask) != type) 9045009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu continue; 9055009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu if (!r->parent) 9065009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu continue; 9075009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu /* 9085009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu * if there are children under that, we should release them 9095009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu * all 9105009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu */ 9115009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu release_child_resources(r); 9125009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu if (!release_resource(r)) { 9135009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu dev_printk(KERN_DEBUG, &dev->dev, 9145009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu "resource %d %pR released\n", idx, r); 9155009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu /* keep the old size */ 9165009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu r->end = resource_size(r) - 1; 9175009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu r->start = 0; 9185009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu r->flags = 0; 9195009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu changed = true; 9205009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu } 9215009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu } 9225009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu 9235009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu if (changed) { 9245009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu /* avoiding touch the one without PREF */ 9255009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu if (type & IORESOURCE_PREFETCH) 9265009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu type = IORESOURCE_PREFETCH; 9275009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu __pci_setup_bridge(bus, type); 9285009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu } 9295009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu} 9305009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu 9315009b46025acb2d3955d2c93574604fba667ef39Yinghai Luenum release_type { 9325009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu leaf_only, 9335009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu whole_subtree, 9345009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu}; 9355009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu/* 9365009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu * try to release pci bridge resources that is from leaf bridge, 9375009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu * so we can allocate big new one later 9385009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu */ 9395009b46025acb2d3955d2c93574604fba667ef39Yinghai Lustatic void __ref pci_bus_release_bridge_resources(struct pci_bus *bus, 9405009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu unsigned long type, 9415009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu enum release_type rel_type) 9425009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu{ 9435009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu struct pci_dev *dev; 9445009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu bool is_leaf_bridge = true; 9455009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu 9465009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu list_for_each_entry(dev, &bus->devices, bus_list) { 9475009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu struct pci_bus *b = dev->subordinate; 9485009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu if (!b) 9495009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu continue; 9505009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu 9515009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu is_leaf_bridge = false; 9525009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu 9535009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu if ((dev->class >> 8) != PCI_CLASS_BRIDGE_PCI) 9545009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu continue; 9555009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu 9565009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu if (rel_type == whole_subtree) 9575009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu pci_bus_release_bridge_resources(b, type, 9585009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu whole_subtree); 9595009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu } 9605009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu 9615009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu if (pci_is_root_bus(bus)) 9625009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu return; 9635009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu 9645009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu if ((bus->self->class >> 8) != PCI_CLASS_BRIDGE_PCI) 9655009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu return; 9665009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu 9675009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu if ((rel_type == whole_subtree) || is_leaf_bridge) 9685009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu pci_bridge_release_resources(bus, type); 9695009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu} 9705009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu 97176fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lustatic void pci_bus_dump_res(struct pci_bus *bus) 97276fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lu{ 97389a74ecccd1f78e51faf6287e5c0e93a92ac096eBjorn Helgaas struct resource *res; 97489a74ecccd1f78e51faf6287e5c0e93a92ac096eBjorn Helgaas int i; 9757c9342b8dd1a32386fc32bffb9eedebbfe264763Yinghai Lu 97689a74ecccd1f78e51faf6287e5c0e93a92ac096eBjorn Helgaas pci_bus_for_each_resource(bus, res, i) { 9777c9342b8dd1a32386fc32bffb9eedebbfe264763Yinghai Lu if (!res || !res->end || !res->flags) 97876fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lu continue; 97976fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lu 980c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas dev_printk(KERN_DEBUG, &bus->dev, "resource %d %pR\n", i, res); 98176fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lu } 98276fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lu} 98376fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lu 98476fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lustatic void pci_bus_dump_resources(struct pci_bus *bus) 98576fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lu{ 98676fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lu struct pci_bus *b; 98776fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lu struct pci_dev *dev; 98876fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lu 98976fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lu 99076fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lu pci_bus_dump_res(bus); 99176fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lu 99276fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lu list_for_each_entry(dev, &bus->devices, bus_list) { 99376fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lu b = dev->subordinate; 99476fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lu if (!b) 99576fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lu continue; 99676fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lu 99776fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lu pci_bus_dump_resources(b); 99876fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lu } 99976fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lu} 100076fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lu 1001da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lustatic int __init pci_bus_get_depth(struct pci_bus *bus) 1002da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu{ 1003da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu int depth = 0; 1004da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu struct pci_dev *dev; 1005da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu 1006da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu list_for_each_entry(dev, &bus->devices, bus_list) { 1007da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu int ret; 1008da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu struct pci_bus *b = dev->subordinate; 1009da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu if (!b) 1010da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu continue; 1011da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu 1012da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu ret = pci_bus_get_depth(b); 1013da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu if (ret + 1 > depth) 1014da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu depth = ret + 1; 1015da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu } 1016da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu 1017da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu return depth; 1018da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu} 1019da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lustatic int __init pci_get_max_depth(void) 1020da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu{ 1021da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu int depth = 0; 1022da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu struct pci_bus *bus; 1023da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu 1024da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu list_for_each_entry(bus, &pci_root_buses, node) { 1025da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu int ret; 1026da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu 1027da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu ret = pci_bus_get_depth(bus); 1028da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu if (ret > depth) 1029da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu depth = ret; 1030da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu } 1031da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu 1032da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu return depth; 1033da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu} 1034da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu 1035f483d3923dc3a6394c483e28ccb3fe700bdf399eRam Pai 1036da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu/* 1037da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu * first try will not touch pci bridge res 1038da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu * second and later try will clear small leaf bridge res 1039da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu * will stop till to the max deepth if can not find good one 1040da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu */ 10411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid __init 10421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldspci_assign_unassigned_resources(void) 10431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 10441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct pci_bus *bus; 1045c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai struct resource_list_x add_list; /* list of resources that 1046c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai want additional resources */ 1047da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu int tried_times = 0; 1048da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu enum release_type rel_type = leaf_only; 1049da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu struct resource_list_x head, *list; 1050da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu unsigned long type_mask = IORESOURCE_IO | IORESOURCE_MEM | 1051da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu IORESOURCE_PREFETCH; 1052da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu unsigned long failed_type; 1053da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu int max_depth = pci_get_max_depth(); 1054da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu int pci_try_num; 1055da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu 1056da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu 1057da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu head.next = NULL; 1058c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai add_list.next = NULL; 1059da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu 1060da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu pci_try_num = max_depth + 1; 1061da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu printk(KERN_DEBUG "PCI: max bus depth: %d pci_try_num: %d\n", 1062da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu max_depth, pci_try_num); 1063da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu 1064da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Luagain: 10651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Depth first, calculate sizes and alignments of all 10661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds subordinate buses. */ 1067da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu list_for_each_entry(bus, &pci_root_buses, node) 1068c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai __pci_bus_size_bridges(bus, &add_list); 1069c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai 10701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Depth last, allocate resources and update the hardware. */ 1071da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu list_for_each_entry(bus, &pci_root_buses, node) 1072da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu __pci_bus_assign_resources(bus, &add_list, &head); 1073c8adf9a3e873eddaaec11ac410a99ef6b9656938Ram Pai BUG_ON(add_list.next); 1074da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu tried_times++; 1075da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu 1076da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu /* any device complain? */ 1077da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu if (!head.next) 1078da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu goto enable_and_dump; 1079f483d3923dc3a6394c483e28ccb3fe700bdf399eRam Pai 1080f483d3923dc3a6394c483e28ccb3fe700bdf399eRam Pai /* don't realloc if asked to do so */ 1081f483d3923dc3a6394c483e28ccb3fe700bdf399eRam Pai if (!pci_realloc_enabled()) { 1082f483d3923dc3a6394c483e28ccb3fe700bdf399eRam Pai free_list(resource_list_x, &head); 1083f483d3923dc3a6394c483e28ccb3fe700bdf399eRam Pai goto enable_and_dump; 1084f483d3923dc3a6394c483e28ccb3fe700bdf399eRam Pai } 1085f483d3923dc3a6394c483e28ccb3fe700bdf399eRam Pai 1086da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu failed_type = 0; 1087da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu for (list = head.next; list;) { 1088da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu failed_type |= list->flags; 1089da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu list = list->next; 1090da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu } 1091da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu /* 1092da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu * io port are tight, don't try extra 1093da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu * or if reach the limit, don't want to try more 1094da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu */ 1095da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu failed_type &= type_mask; 1096da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu if ((failed_type == IORESOURCE_IO) || (tried_times >= pci_try_num)) { 1097da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu free_list(resource_list_x, &head); 1098da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu goto enable_and_dump; 1099da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu } 1100da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu 1101da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu printk(KERN_DEBUG "PCI: No. %d try to assign unassigned res\n", 1102da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu tried_times + 1); 1103da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu 1104da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu /* third times and later will not check if it is leaf */ 1105da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu if ((tried_times + 1) > 2) 1106da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu rel_type = whole_subtree; 1107da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu 1108da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu /* 1109da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu * Try to release leaf bridge's resources that doesn't fit resource of 1110da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu * child device under that bridge 1111da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu */ 1112da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu for (list = head.next; list;) { 1113da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu bus = list->dev->bus; 1114da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu pci_bus_release_bridge_resources(bus, list->flags & type_mask, 1115da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu rel_type); 1116da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu list = list->next; 1117da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu } 1118da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu /* restore size and flags */ 1119da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu for (list = head.next; list;) { 1120da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu struct resource *res = list->res; 1121da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu 1122da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu res->start = list->start; 1123da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu res->end = list->end; 1124da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu res->flags = list->flags; 1125da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu if (list->dev->subordinate) 1126da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu res->flags = 0; 1127da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu 1128da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu list = list->next; 1129da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu } 1130da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu free_list(resource_list_x, &head); 1131da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu 1132da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu goto again; 1133da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu 1134da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Luenable_and_dump: 1135da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu /* Depth last, update the hardware. */ 1136da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu list_for_each_entry(bus, &pci_root_buses, node) 1137da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu pci_enable_bridges(bus); 113876fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lu 113976fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lu /* dump the resource on buses */ 1140da7822e5ad71ec9b745b412639f1e5e0ba795a20Yinghai Lu list_for_each_entry(bus, &pci_root_buses, node) 114176fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lu pci_bus_dump_resources(bus); 11421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 11436841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu 11446841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Luvoid pci_assign_unassigned_bridge_resources(struct pci_dev *bridge) 11456841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu{ 11466841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu struct pci_bus *parent = bridge->subordinate; 114732180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu int tried_times = 0; 114832180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu struct resource_list_x head, *list; 11496841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu int retval; 115032180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu unsigned long type_mask = IORESOURCE_IO | IORESOURCE_MEM | 115132180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu IORESOURCE_PREFETCH; 115232180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu 115332180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu head.next = NULL; 11546841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu 115532180e402f9ff1f3389c99edf3f393425e706080Yinghai Luagain: 11566841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu pci_bus_size_bridges(parent); 115732180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu __pci_bridge_assign_resources(bridge, &head); 115832180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu 115932180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu tried_times++; 116032180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu 116132180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu if (!head.next) 11623f579c340fe6d6bdd8c6f9f144e7c3b85d4174ecYinghai Lu goto enable_all; 116332180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu 116432180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu if (tried_times >= 2) { 116532180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu /* still fail, don't need to try more */ 1166094732a520caae81ae1532af29da82a4fa953472Ram Pai free_list(resource_list_x, &head); 11673f579c340fe6d6bdd8c6f9f144e7c3b85d4174ecYinghai Lu goto enable_all; 116832180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu } 116932180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu 117032180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu printk(KERN_DEBUG "PCI: No. %d try to assign unassigned res\n", 117132180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu tried_times + 1); 117232180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu 117332180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu /* 117432180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu * Try to release leaf bridge's resources that doesn't fit resource of 117532180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu * child device under that bridge 117632180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu */ 117732180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu for (list = head.next; list;) { 117832180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu struct pci_bus *bus = list->dev->bus; 117932180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu unsigned long flags = list->flags; 118032180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu 118132180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu pci_bus_release_bridge_resources(bus, flags & type_mask, 118232180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu whole_subtree); 118332180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu list = list->next; 118432180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu } 118532180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu /* restore size and flags */ 118632180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu for (list = head.next; list;) { 118732180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu struct resource *res = list->res; 118832180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu 118932180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu res->start = list->start; 119032180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu res->end = list->end; 119132180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu res->flags = list->flags; 119232180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu if (list->dev->subordinate) 119332180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu res->flags = 0; 119432180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu 119532180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu list = list->next; 119632180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu } 1197094732a520caae81ae1532af29da82a4fa953472Ram Pai free_list(resource_list_x, &head); 119832180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu 119932180e402f9ff1f3389c99edf3f393425e706080Yinghai Lu goto again; 12003f579c340fe6d6bdd8c6f9f144e7c3b85d4174ecYinghai Lu 12013f579c340fe6d6bdd8c6f9f144e7c3b85d4174ecYinghai Luenable_all: 12023f579c340fe6d6bdd8c6f9f144e7c3b85d4174ecYinghai Lu retval = pci_reenable_device(bridge); 12033f579c340fe6d6bdd8c6f9f144e7c3b85d4174ecYinghai Lu pci_set_master(bridge); 12043f579c340fe6d6bdd8c6f9f144e7c3b85d4174ecYinghai Lu pci_enable_bridges(parent); 12056841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu} 12066841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai LuEXPORT_SYMBOL_GPL(pci_assign_unassigned_bridge_resources); 1207