setup-bus.c revision 6841ec681a88b66651e4563040b9c7a7ad25d7b5
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; 36568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu unsigned long flags; 37568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu}; 38568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu 39568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lustatic void add_to_failed_list(struct resource_list_x *head, 40568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu struct pci_dev *dev, struct resource *res) 41568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu{ 42568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu struct resource_list_x *list = head; 43568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu struct resource_list_x *ln = list->next; 44568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu struct resource_list_x *tmp; 45568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu 46568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu tmp = kmalloc(sizeof(*tmp), GFP_KERNEL); 47568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu if (!tmp) { 48568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu pr_warning("add_to_failed_list: kmalloc() failed!\n"); 49568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu return; 50568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu } 51568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu 52568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu tmp->next = ln; 53568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu tmp->res = res; 54568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu tmp->dev = dev; 55568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu tmp->start = res->start; 56568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu tmp->end = res->end; 57568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu tmp->flags = res->flags; 58568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu list->next = tmp; 59568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu} 60568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu 61568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lustatic void free_failed_list(struct resource_list_x *head) 62568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu{ 63568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu struct resource_list_x *list, *tmp; 64568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu 65568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu for (list = head->next; list;) { 66568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu tmp = list; 67568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu list = list->next; 68568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu kfree(tmp); 69568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu } 70568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu 71568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu head->next = NULL; 72568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu} 73568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu 746841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lustatic void __dev_sort_resources(struct pci_dev *dev, 756841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu struct resource_list *head) 761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 776841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu u16 class = dev->class >> 8; 781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 796841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu /* Don't touch classless devices or host bridges or ioapics. */ 806841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu if (class == PCI_CLASS_NOT_DEFINED || class == PCI_CLASS_BRIDGE_HOST) 816841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu return; 821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 836841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu /* Don't touch ioapic devices already enabled by firmware */ 846841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu if (class == PCI_CLASS_SYSTEM_PIC) { 856841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu u16 command; 866841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu pci_read_config_word(dev, PCI_COMMAND, &command); 876841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu if (command & (PCI_COMMAND_IO | PCI_COMMAND_MEMORY)) 886841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu return; 896841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu } 901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 916841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu pdev_sort_resources(dev, head); 926841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu} 9323186279658cea6d42a050400d3e79c56cb459b4Satoru Takeuchi 946841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lustatic void __assign_resources_sorted(struct resource_list *head, 956841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu struct resource_list_x *fail_head) 966841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu{ 976841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu struct resource *res; 986841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu struct resource_list *list, *tmp; 996841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu int idx; 1001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1016841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu for (list = head->next; list;) { 1021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds res = list->res; 1031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds idx = res - &list->dev->resource[0]; 104542df5de56a23bf2d94b75e2b304ab0e5a5508a8Rajesh Shah if (pci_assign_resource(list->dev, idx)) { 105568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu if (fail_head && !pci_is_root_bus(list->dev->bus)) 106568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu add_to_failed_list(fail_head, list->dev, res); 107542df5de56a23bf2d94b75e2b304ab0e5a5508a8Rajesh Shah res->start = 0; 108960b8466548c9bc6f718b5f470c1a58000fab09dIvan Kokshaysky res->end = 0; 109542df5de56a23bf2d94b75e2b304ab0e5a5508a8Rajesh Shah res->flags = 0; 110542df5de56a23bf2d94b75e2b304ab0e5a5508a8Rajesh Shah } 1111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds tmp = list; 1121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds list = list->next; 1131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds kfree(tmp); 1141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 1151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 1161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1176841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lustatic void pdev_assign_resources_sorted(struct pci_dev *dev, 1186841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu struct resource_list_x *fail_head) 1196841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu{ 1206841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu struct resource_list head; 1216841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu 1226841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu head.next = NULL; 1236841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu __dev_sort_resources(dev, &head); 1246841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu __assign_resources_sorted(&head, fail_head); 1256841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu 1266841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu} 1276841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu 1286841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lustatic void pbus_assign_resources_sorted(const struct pci_bus *bus, 1296841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu struct resource_list_x *fail_head) 1306841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu{ 1316841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu struct pci_dev *dev; 1326841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu struct resource_list head; 1336841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu 1346841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu head.next = NULL; 1356841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu list_for_each_entry(dev, &bus->devices, bus_list) 1366841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu __dev_sort_resources(dev, &head); 1376841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu 1386841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu __assign_resources_sorted(&head, fail_head); 1396841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu} 1406841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu 141b3743fa4442fc172e950ff0eaf6aa96e7d5ce9beDominik Brodowskivoid pci_setup_cardbus(struct pci_bus *bus) 1421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct pci_dev *bridge = bus->self; 144c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas struct resource *res; 1451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct pci_bus_region region; 1461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 147865df576e8fc70daf297b53e61a4fbefc719d065Bjorn Helgaas dev_info(&bridge->dev, "CardBus bridge to [bus %02x-%02x]\n", 148865df576e8fc70daf297b53e61a4fbefc719d065Bjorn Helgaas bus->secondary, bus->subordinate); 1491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 150c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas res = bus->resource[0]; 151c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas pcibios_resource_to_bus(bridge, ®ion, res); 152c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas if (res->flags & IORESOURCE_IO) { 1531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* 1541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * The IO resource is allocated a range twice as large as it 1551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * would normally need. This allows us to set both IO regs. 1561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 157c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas dev_info(&bridge->dev, " bridge window %pR\n", res); 1581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_write_config_dword(bridge, PCI_CB_IO_BASE_0, 1591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds region.start); 1601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_write_config_dword(bridge, PCI_CB_IO_LIMIT_0, 1611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds region.end); 1621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 1631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 164c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas res = bus->resource[1]; 165c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas pcibios_resource_to_bus(bridge, ®ion, res); 166c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas if (res->flags & IORESOURCE_IO) { 167c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas dev_info(&bridge->dev, " bridge window %pR\n", res); 1681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_write_config_dword(bridge, PCI_CB_IO_BASE_1, 1691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds region.start); 1701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_write_config_dword(bridge, PCI_CB_IO_LIMIT_1, 1711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds region.end); 1721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 1731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 174c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas res = bus->resource[2]; 175c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas pcibios_resource_to_bus(bridge, ®ion, res); 176c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas if (res->flags & IORESOURCE_MEM) { 177c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas dev_info(&bridge->dev, " bridge window %pR\n", res); 1781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_write_config_dword(bridge, PCI_CB_MEMORY_BASE_0, 1791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds region.start); 1801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_write_config_dword(bridge, PCI_CB_MEMORY_LIMIT_0, 1811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds region.end); 1821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 1831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 184c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas res = bus->resource[3]; 185c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas pcibios_resource_to_bus(bridge, ®ion, res); 186c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas if (res->flags & IORESOURCE_MEM) { 187c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas dev_info(&bridge->dev, " bridge window %pR\n", res); 1881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_write_config_dword(bridge, PCI_CB_MEMORY_BASE_1, 1891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds region.start); 1901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_write_config_dword(bridge, PCI_CB_MEMORY_LIMIT_1, 1911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds region.end); 1921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 1931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 194b3743fa4442fc172e950ff0eaf6aa96e7d5ce9beDominik BrodowskiEXPORT_SYMBOL(pci_setup_cardbus); 1951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* Initialize bridges with base/limit values we have collected. 1971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds PCI-to-PCI Bridge Architecture Specification rev. 1.1 (1998) 1981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds requires that if there is no I/O ports or memory behind the 1991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bridge, corresponding range must be turned off by writing base 2001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds value greater than limit to the bridge's base/limit registers. 2011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds Note: care must be taken when updating I/O base/limit registers 2031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds of bridges which support 32-bit I/O. This update requires two 2041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds config space writes, so it's quite possible that an I/O window of 2051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds the bridge will have some undesirable address (e.g. 0) after the 2061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds first write. Ditto 64-bit prefetchable MMIO. */ 2077cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lustatic void pci_setup_bridge_io(struct pci_bus *bus) 2081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 2091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct pci_dev *bridge = bus->self; 210c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas struct resource *res; 2111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct pci_bus_region region; 2127cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu u32 l, io_upper16; 2131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Set up the top and bottom of the PCI I/O segment for this bus. */ 215c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas res = bus->resource[0]; 216c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas pcibios_resource_to_bus(bridge, ®ion, res); 217c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas if (res->flags & IORESOURCE_IO) { 2181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_read_config_dword(bridge, PCI_IO_BASE, &l); 2191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds l &= 0xffff0000; 2201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds l |= (region.start >> 8) & 0x00f0; 2211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds l |= region.end & 0xf000; 2221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Set up upper 16 bits of I/O base/limit. */ 2231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds io_upper16 = (region.end & 0xffff0000) | (region.start >> 16); 224c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas dev_info(&bridge->dev, " bridge window %pR\n", res); 2257cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu } else { 2261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Clear upper 16 bits of I/O base/limit. */ 2271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds io_upper16 = 0; 2281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds l = 0x00f0; 229c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas dev_info(&bridge->dev, " bridge window [io disabled]\n"); 2301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 2311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Temporarily disable the I/O range before updating PCI_IO_BASE. */ 2321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_write_config_dword(bridge, PCI_IO_BASE_UPPER16, 0x0000ffff); 2331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Update lower 16 bits of I/O base/limit. */ 2341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_write_config_dword(bridge, PCI_IO_BASE, l); 2351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Update upper 16 bits of I/O base/limit. */ 2361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_write_config_dword(bridge, PCI_IO_BASE_UPPER16, io_upper16); 2377cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu} 2387cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu 2397cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lustatic void pci_setup_bridge_mmio(struct pci_bus *bus) 2407cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu{ 2417cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu struct pci_dev *bridge = bus->self; 2427cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu struct resource *res; 2437cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu struct pci_bus_region region; 2447cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu u32 l; 2451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2467cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu /* Set up the top and bottom of the PCI Memory segment for this bus. */ 247c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas res = bus->resource[1]; 248c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas pcibios_resource_to_bus(bridge, ®ion, res); 249c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas if (res->flags & IORESOURCE_MEM) { 2501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds l = (region.start >> 16) & 0xfff0; 2511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds l |= region.end & 0xfff00000; 252c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas dev_info(&bridge->dev, " bridge window %pR\n", res); 2537cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu } else { 2541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds l = 0x0000fff0; 255c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas dev_info(&bridge->dev, " bridge window [mem disabled]\n"); 2561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 2571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_write_config_dword(bridge, PCI_MEMORY_BASE, l); 2587cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu} 2597cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu 2607cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lustatic void pci_setup_bridge_mmio_pref(struct pci_bus *bus) 2617cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu{ 2627cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu struct pci_dev *bridge = bus->self; 2637cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu struct resource *res; 2647cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu struct pci_bus_region region; 2657cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu u32 l, bu, lu; 2661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Clear out the upper 32 bits of PREF limit. 2681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds If PCI_PREF_BASE_UPPER32 was non-zero, this temporarily 2691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds disables PREF range, which is ok. */ 2701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_write_config_dword(bridge, PCI_PREF_LIMIT_UPPER32, 0); 2711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Set up PREF base/limit. */ 273c40a22e0ce5eb400f27449e59e43d021bee58b8dBenjamin Herrenschmidt bu = lu = 0; 274c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas res = bus->resource[2]; 275c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas pcibios_resource_to_bus(bridge, ®ion, res); 276c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas if (res->flags & IORESOURCE_PREFETCH) { 2771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds l = (region.start >> 16) & 0xfff0; 2781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds l |= region.end & 0xfff00000; 279c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas if (res->flags & IORESOURCE_MEM_64) { 2801f82de10d6b1d845155363c895c552e61b36b51aYinghai Lu bu = upper_32_bits(region.start); 2811f82de10d6b1d845155363c895c552e61b36b51aYinghai Lu lu = upper_32_bits(region.end); 2821f82de10d6b1d845155363c895c552e61b36b51aYinghai Lu } 283c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas dev_info(&bridge->dev, " bridge window %pR\n", res); 2847cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu } else { 2851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds l = 0x0000fff0; 286c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas dev_info(&bridge->dev, " bridge window [mem pref disabled]\n"); 2871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 2881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_write_config_dword(bridge, PCI_PREF_MEMORY_BASE, l); 2891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 29059353ea30e65ab3ae181d6175e3212e1361c3787Alex Williamson /* Set the upper 32 bits of PREF base & limit. */ 29159353ea30e65ab3ae181d6175e3212e1361c3787Alex Williamson pci_write_config_dword(bridge, PCI_PREF_BASE_UPPER32, bu); 29259353ea30e65ab3ae181d6175e3212e1361c3787Alex Williamson pci_write_config_dword(bridge, PCI_PREF_LIMIT_UPPER32, lu); 2937cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu} 2947cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu 2957cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lustatic void __pci_setup_bridge(struct pci_bus *bus, unsigned long type) 2967cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu{ 2977cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu struct pci_dev *bridge = bus->self; 2987cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu 2997cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu dev_info(&bridge->dev, "PCI bridge to [bus %02x-%02x]\n", 3007cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu bus->secondary, bus->subordinate); 3017cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu 3027cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu if (type & IORESOURCE_IO) 3037cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu pci_setup_bridge_io(bus); 3047cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu 3057cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu if (type & IORESOURCE_MEM) 3067cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu pci_setup_bridge_mmio(bus); 3077cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu 3087cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu if (type & IORESOURCE_PREFETCH) 3097cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu pci_setup_bridge_mmio_pref(bus); 3101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_write_config_word(bridge, PCI_BRIDGE_CONTROL, bus->bridge_ctl); 3121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 3131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3147cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lustatic void pci_setup_bridge(struct pci_bus *bus) 3157cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu{ 3167cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu unsigned long type = IORESOURCE_IO | IORESOURCE_MEM | 3177cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu IORESOURCE_PREFETCH; 3187cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu 3197cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu __pci_setup_bridge(bus, type); 3207cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu} 3217cc5997d1dada3bdeed95a59c2f4f6c66cbb0767Yinghai Lu 3221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* Check whether the bridge supports optional I/O and 3231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds prefetchable memory ranges. If not, the respective 3241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds base/limit registers must be read-only and read as 0. */ 32596bde06a2df1b363206d3cdef53134b84ff37813Sam Ravnborgstatic void pci_bridge_check_ranges(struct pci_bus *bus) 3261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 3271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u16 io; 3281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u32 pmem; 3291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct pci_dev *bridge = bus->self; 3301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct resource *b_res; 3311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds b_res = &bridge->resource[PCI_BRIDGE_RESOURCES]; 3331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds b_res[1].flags |= IORESOURCE_MEM; 3341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_read_config_word(bridge, PCI_IO_BASE, &io); 3361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!io) { 3371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_write_config_word(bridge, PCI_IO_BASE, 0xf0f0); 3381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_read_config_word(bridge, PCI_IO_BASE, &io); 3391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_write_config_word(bridge, PCI_IO_BASE, 0x0); 3401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 3411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (io) 3421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds b_res[0].flags |= IORESOURCE_IO; 3431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* DECchip 21050 pass 2 errata: the bridge may miss an address 3441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds disconnect boundary by one PCI data phase. 3451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds Workaround: do not use prefetching on this device. */ 3461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (bridge->vendor == PCI_VENDOR_ID_DEC && bridge->device == 0x0001) 3471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return; 3481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_read_config_dword(bridge, PCI_PREF_MEMORY_BASE, &pmem); 3491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!pmem) { 3501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_write_config_dword(bridge, PCI_PREF_MEMORY_BASE, 3511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0xfff0fff0); 3521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_read_config_dword(bridge, PCI_PREF_MEMORY_BASE, &pmem); 3531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_write_config_dword(bridge, PCI_PREF_MEMORY_BASE, 0x0); 3541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 3551f82de10d6b1d845155363c895c552e61b36b51aYinghai Lu if (pmem) { 3561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds b_res[2].flags |= IORESOURCE_MEM | IORESOURCE_PREFETCH; 3571f82de10d6b1d845155363c895c552e61b36b51aYinghai Lu if ((pmem & PCI_PREF_RANGE_TYPE_MASK) == PCI_PREF_RANGE_TYPE_64) 3581f82de10d6b1d845155363c895c552e61b36b51aYinghai Lu b_res[2].flags |= IORESOURCE_MEM_64; 3591f82de10d6b1d845155363c895c552e61b36b51aYinghai Lu } 3601f82de10d6b1d845155363c895c552e61b36b51aYinghai Lu 3611f82de10d6b1d845155363c895c552e61b36b51aYinghai Lu /* double check if bridge does support 64 bit pref */ 3621f82de10d6b1d845155363c895c552e61b36b51aYinghai Lu if (b_res[2].flags & IORESOURCE_MEM_64) { 3631f82de10d6b1d845155363c895c552e61b36b51aYinghai Lu u32 mem_base_hi, tmp; 3641f82de10d6b1d845155363c895c552e61b36b51aYinghai Lu pci_read_config_dword(bridge, PCI_PREF_BASE_UPPER32, 3651f82de10d6b1d845155363c895c552e61b36b51aYinghai Lu &mem_base_hi); 3661f82de10d6b1d845155363c895c552e61b36b51aYinghai Lu pci_write_config_dword(bridge, PCI_PREF_BASE_UPPER32, 3671f82de10d6b1d845155363c895c552e61b36b51aYinghai Lu 0xffffffff); 3681f82de10d6b1d845155363c895c552e61b36b51aYinghai Lu pci_read_config_dword(bridge, PCI_PREF_BASE_UPPER32, &tmp); 3691f82de10d6b1d845155363c895c552e61b36b51aYinghai Lu if (!tmp) 3701f82de10d6b1d845155363c895c552e61b36b51aYinghai Lu b_res[2].flags &= ~IORESOURCE_MEM_64; 3711f82de10d6b1d845155363c895c552e61b36b51aYinghai Lu pci_write_config_dword(bridge, PCI_PREF_BASE_UPPER32, 3721f82de10d6b1d845155363c895c552e61b36b51aYinghai Lu mem_base_hi); 3731f82de10d6b1d845155363c895c552e61b36b51aYinghai Lu } 3741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 3751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* Helper function for sizing routines: find first available 3771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bus resource of a given type. Note: we intentionally skip 3781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds the bus resources which have already been assigned (that is, 3791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds have non-NULL parent resource). */ 38096bde06a2df1b363206d3cdef53134b84ff37813Sam Ravnborgstatic struct resource *find_free_bus_resource(struct pci_bus *bus, unsigned long type) 3811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 3821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int i; 3831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct resource *r; 3841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long type_mask = IORESOURCE_IO | IORESOURCE_MEM | 3851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds IORESOURCE_PREFETCH; 3861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (i = 0; i < PCI_BUS_NUM_RESOURCES; i++) { 3881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds r = bus->resource[i]; 389299de0343c7d18448a69c635378342e9214b14afIvan Kokshaysky if (r == &ioport_resource || r == &iomem_resource) 390299de0343c7d18448a69c635378342e9214b14afIvan Kokshaysky continue; 39155a1098476619d5d8f4cdae7240ea759274dead7Jesse Barnes if (r && (r->flags & type_mask) == type && !r->parent) 39255a1098476619d5d8f4cdae7240ea759274dead7Jesse Barnes return r; 3931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 3941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return NULL; 3951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 3961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* Sizing the IO windows of the PCI-PCI bridge is trivial, 3981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds since these windows have 4K granularity and the IO ranges 3991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds of non-bridge PCI devices are limited to 256 bytes. 4001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds We must be careful with the ISA aliasing though. */ 40128760489a3f1e136c5ae8581c0fa8f63511f2f4cEric W. Biedermanstatic void pbus_size_io(struct pci_bus *bus, resource_size_t min_size) 4021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 4031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct pci_dev *dev; 4041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct resource *b_res = find_free_bus_resource(bus, IORESOURCE_IO); 405d65245c3297ac63abc51a976d92f45f2195d2854Yinghai Lu unsigned long size = 0, size1 = 0, old_size; 4061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!b_res) 4081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return; 4091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds list_for_each_entry(dev, &bus->devices, bus_list) { 4111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int i; 4121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (i = 0; i < PCI_NUM_RESOURCES; i++) { 4141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct resource *r = &dev->resource[i]; 4151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long r_size; 4161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (r->parent || !(r->flags & IORESOURCE_IO)) 4181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds continue; 419022edd86d7c864bc8fadc3c8ac4e6a464472ab05Zhao, Yu r_size = resource_size(r); 4201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (r_size < 0x400) 4221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Might be re-aligned for ISA */ 4231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds size += r_size; 4241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 4251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds size1 += r_size; 4261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 4271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 42828760489a3f1e136c5ae8581c0fa8f63511f2f4cEric W. Biederman if (size < min_size) 42928760489a3f1e136c5ae8581c0fa8f63511f2f4cEric W. Biederman size = min_size; 430d65245c3297ac63abc51a976d92f45f2195d2854Yinghai Lu old_size = resource_size(b_res); 431d65245c3297ac63abc51a976d92f45f2195d2854Yinghai Lu if (old_size == 1) 432d65245c3297ac63abc51a976d92f45f2195d2854Yinghai Lu old_size = 0; 4331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* To be fixed in 2.5: we should have sort of HAVE_ISA 4341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds flag in the struct pci_bus. */ 4351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#if defined(CONFIG_ISA) || defined(CONFIG_EISA) 4361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds size = (size & 0xff) + ((size & ~0xffUL) << 2); 4371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif 4386f6f8c2f4b59711857d14ada8e70309d52e8fae4Milind Arun Choudhary size = ALIGN(size + size1, 4096); 439d65245c3297ac63abc51a976d92f45f2195d2854Yinghai Lu if (size < old_size) 440d65245c3297ac63abc51a976d92f45f2195d2854Yinghai Lu size = old_size; 4411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!size) { 442865df576e8fc70daf297b53e61a4fbefc719d065Bjorn Helgaas if (b_res->start || b_res->end) 443865df576e8fc70daf297b53e61a4fbefc719d065Bjorn Helgaas dev_info(&bus->self->dev, "disabling bridge window " 444865df576e8fc70daf297b53e61a4fbefc719d065Bjorn Helgaas "%pR to [bus %02x-%02x] (unused)\n", b_res, 445865df576e8fc70daf297b53e61a4fbefc719d065Bjorn Helgaas bus->secondary, bus->subordinate); 4461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds b_res->flags = 0; 4471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return; 4481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 4491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Alignment of the IO window is always 4K */ 4501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds b_res->start = 4096; 4511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds b_res->end = b_res->start + size - 1; 452884525655d07fdee9245716b998ecdc45cdd8007Ivan Kokshaysky b_res->flags |= IORESOURCE_STARTALIGN; 4531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 4541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* Calculate the size of the bus and minimal alignment which 4561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds guarantees that all child resources fit in this size. */ 45728760489a3f1e136c5ae8581c0fa8f63511f2f4cEric W. Biedermanstatic int pbus_size_mem(struct pci_bus *bus, unsigned long mask, 45828760489a3f1e136c5ae8581c0fa8f63511f2f4cEric W. Biederman unsigned long type, resource_size_t min_size) 4591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 4601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct pci_dev *dev; 461d65245c3297ac63abc51a976d92f45f2195d2854Yinghai Lu resource_size_t min_align, align, size, old_size; 462c40a22e0ce5eb400f27449e59e43d021bee58b8dBenjamin Herrenschmidt resource_size_t aligns[12]; /* Alignments from 1Mb to 2Gb */ 4631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int order, max_order; 4641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct resource *b_res = find_free_bus_resource(bus, type); 4651f82de10d6b1d845155363c895c552e61b36b51aYinghai Lu unsigned int mem64_mask = 0; 4661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!b_res) 4681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 4691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds memset(aligns, 0, sizeof(aligns)); 4711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds max_order = 0; 4721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds size = 0; 4731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4741f82de10d6b1d845155363c895c552e61b36b51aYinghai Lu mem64_mask = b_res->flags & IORESOURCE_MEM_64; 4751f82de10d6b1d845155363c895c552e61b36b51aYinghai Lu b_res->flags &= ~IORESOURCE_MEM_64; 4761f82de10d6b1d845155363c895c552e61b36b51aYinghai Lu 4771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds list_for_each_entry(dev, &bus->devices, bus_list) { 4781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int i; 4791f82de10d6b1d845155363c895c552e61b36b51aYinghai Lu 4801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (i = 0; i < PCI_NUM_RESOURCES; i++) { 4811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct resource *r = &dev->resource[i]; 482c40a22e0ce5eb400f27449e59e43d021bee58b8dBenjamin Herrenschmidt resource_size_t r_size; 4831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (r->parent || (r->flags & mask) != type) 4851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds continue; 486022edd86d7c864bc8fadc3c8ac4e6a464472ab05Zhao, Yu r_size = resource_size(r); 4871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* For bridges size != alignment */ 4886faf17f6f1ffc586d16efc2f9fa2083a7785ee74Chris Wright align = pci_resource_alignment(dev, r); 4891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds order = __ffs(align) - 20; 4901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (order > 11) { 491865df576e8fc70daf297b53e61a4fbefc719d065Bjorn Helgaas dev_warn(&dev->dev, "disabling BAR %d: %pR " 492865df576e8fc70daf297b53e61a4fbefc719d065Bjorn Helgaas "(bad alignment %#llx)\n", i, r, 493865df576e8fc70daf297b53e61a4fbefc719d065Bjorn Helgaas (unsigned long long) align); 4941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds r->flags = 0; 4951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds continue; 4961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 4971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds size += r_size; 4981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (order < 0) 4991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds order = 0; 5001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Exclude ranges with size > align from 5011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds calculation of the alignment. */ 5021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (r_size == align) 5031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds aligns[order] += align; 5041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (order > max_order) 5051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds max_order = order; 5061f82de10d6b1d845155363c895c552e61b36b51aYinghai Lu mem64_mask &= r->flags & IORESOURCE_MEM_64; 5071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 5081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 50928760489a3f1e136c5ae8581c0fa8f63511f2f4cEric W. Biederman if (size < min_size) 51028760489a3f1e136c5ae8581c0fa8f63511f2f4cEric W. Biederman size = min_size; 511d65245c3297ac63abc51a976d92f45f2195d2854Yinghai Lu old_size = resource_size(b_res); 512d65245c3297ac63abc51a976d92f45f2195d2854Yinghai Lu if (old_size == 1) 513d65245c3297ac63abc51a976d92f45f2195d2854Yinghai Lu old_size = 0; 514d65245c3297ac63abc51a976d92f45f2195d2854Yinghai Lu if (size < old_size) 515d65245c3297ac63abc51a976d92f45f2195d2854Yinghai Lu size = old_size; 5161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds align = 0; 5181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds min_align = 0; 5191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (order = 0; order <= max_order; order++) { 5208308c54d7e312f7a03e2ce2057d0837e6fe3843fJeremy Fitzhardinge resource_size_t align1 = 1; 5218308c54d7e312f7a03e2ce2057d0837e6fe3843fJeremy Fitzhardinge 5228308c54d7e312f7a03e2ce2057d0837e6fe3843fJeremy Fitzhardinge align1 <<= (order + 20); 5238308c54d7e312f7a03e2ce2057d0837e6fe3843fJeremy Fitzhardinge 5241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!align) 5251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds min_align = align1; 5266f6f8c2f4b59711857d14ada8e70309d52e8fae4Milind Arun Choudhary else if (ALIGN(align + min_align, min_align) < align1) 5271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds min_align = align1 >> 1; 5281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds align += aligns[order]; 5291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 5306f6f8c2f4b59711857d14ada8e70309d52e8fae4Milind Arun Choudhary size = ALIGN(size, min_align); 5311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!size) { 532865df576e8fc70daf297b53e61a4fbefc719d065Bjorn Helgaas if (b_res->start || b_res->end) 533865df576e8fc70daf297b53e61a4fbefc719d065Bjorn Helgaas dev_info(&bus->self->dev, "disabling bridge window " 534865df576e8fc70daf297b53e61a4fbefc719d065Bjorn Helgaas "%pR to [bus %02x-%02x] (unused)\n", b_res, 535865df576e8fc70daf297b53e61a4fbefc719d065Bjorn Helgaas bus->secondary, bus->subordinate); 5361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds b_res->flags = 0; 5371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 1; 5381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 5391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds b_res->start = min_align; 5401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds b_res->end = size + min_align - 1; 541884525655d07fdee9245716b998ecdc45cdd8007Ivan Kokshaysky b_res->flags |= IORESOURCE_STARTALIGN; 5421f82de10d6b1d845155363c895c552e61b36b51aYinghai Lu b_res->flags |= mem64_mask; 5431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 1; 5441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 5451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5465468ae617035f06ae1e07c264d6cdfcd721b539fAdrian Bunkstatic void pci_bus_size_cardbus(struct pci_bus *bus) 5471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 5481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct pci_dev *bridge = bus->self; 5491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct resource *b_res = &bridge->resource[PCI_BRIDGE_RESOURCES]; 5501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u16 ctrl; 5511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* 5531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Reserve some resources for CardBus. We reserve 5541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * a fixed amount of bus space for CardBus bridges. 5551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 556934b7024f0ed29003c95cef447d92737ab86dc4fLinus Torvalds b_res[0].start = 0; 557934b7024f0ed29003c95cef447d92737ab86dc4fLinus Torvalds b_res[0].end = pci_cardbus_io_size - 1; 558934b7024f0ed29003c95cef447d92737ab86dc4fLinus Torvalds b_res[0].flags |= IORESOURCE_IO | IORESOURCE_SIZEALIGN; 5591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 560934b7024f0ed29003c95cef447d92737ab86dc4fLinus Torvalds b_res[1].start = 0; 561934b7024f0ed29003c95cef447d92737ab86dc4fLinus Torvalds b_res[1].end = pci_cardbus_io_size - 1; 562934b7024f0ed29003c95cef447d92737ab86dc4fLinus Torvalds b_res[1].flags |= IORESOURCE_IO | IORESOURCE_SIZEALIGN; 5631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* 5651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Check whether prefetchable memory is supported 5661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * by this bridge. 5671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 5681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_read_config_word(bridge, PCI_CB_BRIDGE_CONTROL, &ctrl); 5691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!(ctrl & PCI_CB_BRIDGE_CTL_PREFETCH_MEM0)) { 5701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ctrl |= PCI_CB_BRIDGE_CTL_PREFETCH_MEM0; 5711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_write_config_word(bridge, PCI_CB_BRIDGE_CONTROL, ctrl); 5721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_read_config_word(bridge, PCI_CB_BRIDGE_CONTROL, &ctrl); 5731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 5741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* 5761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * If we have prefetchable memory support, allocate 5771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * two regions. Otherwise, allocate one region of 5781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * twice the size. 5791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 5801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (ctrl & PCI_CB_BRIDGE_CTL_PREFETCH_MEM0) { 581934b7024f0ed29003c95cef447d92737ab86dc4fLinus Torvalds b_res[2].start = 0; 582934b7024f0ed29003c95cef447d92737ab86dc4fLinus Torvalds b_res[2].end = pci_cardbus_mem_size - 1; 583934b7024f0ed29003c95cef447d92737ab86dc4fLinus Torvalds b_res[2].flags |= IORESOURCE_MEM | IORESOURCE_PREFETCH | IORESOURCE_SIZEALIGN; 5841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 585934b7024f0ed29003c95cef447d92737ab86dc4fLinus Torvalds b_res[3].start = 0; 586934b7024f0ed29003c95cef447d92737ab86dc4fLinus Torvalds b_res[3].end = pci_cardbus_mem_size - 1; 587934b7024f0ed29003c95cef447d92737ab86dc4fLinus Torvalds b_res[3].flags |= IORESOURCE_MEM | IORESOURCE_SIZEALIGN; 5881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else { 589934b7024f0ed29003c95cef447d92737ab86dc4fLinus Torvalds b_res[3].start = 0; 590934b7024f0ed29003c95cef447d92737ab86dc4fLinus Torvalds b_res[3].end = pci_cardbus_mem_size * 2 - 1; 591934b7024f0ed29003c95cef447d92737ab86dc4fLinus Torvalds b_res[3].flags |= IORESOURCE_MEM | IORESOURCE_SIZEALIGN; 5921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 5931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 5941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 595451124a7cc6c89fcb83d48082c7290f16f652f1cSam Ravnborgvoid __ref pci_bus_size_bridges(struct pci_bus *bus) 5961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 5971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct pci_dev *dev; 5981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long mask, prefmask; 59928760489a3f1e136c5ae8581c0fa8f63511f2f4cEric W. Biederman resource_size_t min_mem_size = 0, min_io_size = 0; 6001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds list_for_each_entry(dev, &bus->devices, bus_list) { 6021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct pci_bus *b = dev->subordinate; 6031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!b) 6041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds continue; 6051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds switch (dev->class >> 8) { 6071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case PCI_CLASS_BRIDGE_CARDBUS: 6081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_bus_size_cardbus(b); 6091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 6101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case PCI_CLASS_BRIDGE_PCI: 6121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds default: 6131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_bus_size_bridges(b); 6141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 6151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 6161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 6171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* The root bus? */ 6191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!bus->self) 6201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return; 6211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds switch (bus->self->class >> 8) { 6231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case PCI_CLASS_BRIDGE_CARDBUS: 6241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* don't size cardbuses yet. */ 6251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 6261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case PCI_CLASS_BRIDGE_PCI: 6281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_bridge_check_ranges(bus); 62928760489a3f1e136c5ae8581c0fa8f63511f2f4cEric W. Biederman if (bus->self->is_hotplug_bridge) { 63028760489a3f1e136c5ae8581c0fa8f63511f2f4cEric W. Biederman min_io_size = pci_hotplug_io_size; 63128760489a3f1e136c5ae8581c0fa8f63511f2f4cEric W. Biederman min_mem_size = pci_hotplug_mem_size; 63228760489a3f1e136c5ae8581c0fa8f63511f2f4cEric W. Biederman } 6331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds default: 63428760489a3f1e136c5ae8581c0fa8f63511f2f4cEric W. Biederman pbus_size_io(bus, min_io_size); 6351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* If the bridge supports prefetchable range, size it 6361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds separately. If it doesn't, or its prefetchable window 6371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds has already been allocated by arch code, try 6381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds non-prefetchable range for both types of PCI memory 6391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds resources. */ 6401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mask = IORESOURCE_MEM; 6411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds prefmask = IORESOURCE_MEM | IORESOURCE_PREFETCH; 64228760489a3f1e136c5ae8581c0fa8f63511f2f4cEric W. Biederman if (pbus_size_mem(bus, prefmask, prefmask, min_mem_size)) 6431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mask = prefmask; /* Success, size non-prefetch only. */ 64428760489a3f1e136c5ae8581c0fa8f63511f2f4cEric W. Biederman else 64528760489a3f1e136c5ae8581c0fa8f63511f2f4cEric W. Biederman min_mem_size += min_mem_size; 64628760489a3f1e136c5ae8581c0fa8f63511f2f4cEric W. Biederman pbus_size_mem(bus, mask, IORESOURCE_MEM, min_mem_size); 6471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 6481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 6491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 6501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL(pci_bus_size_bridges); 6511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 652568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lustatic void __ref __pci_bus_assign_resources(const struct pci_bus *bus, 653568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu struct resource_list_x *fail_head) 6541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 6551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct pci_bus *b; 6561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct pci_dev *dev; 6571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 658568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu pbus_assign_resources_sorted(bus, fail_head); 6591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds list_for_each_entry(dev, &bus->devices, bus_list) { 6611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds b = dev->subordinate; 6621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!b) 6631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds continue; 6641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 665568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu __pci_bus_assign_resources(b, fail_head); 6661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds switch (dev->class >> 8) { 6681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case PCI_CLASS_BRIDGE_PCI: 6696841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu if (!pci_is_enabled(dev)) 6706841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu pci_setup_bridge(b); 6711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 6721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case PCI_CLASS_BRIDGE_CARDBUS: 6741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_setup_cardbus(b); 6751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 6761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds default: 67880ccba1186d48fa728dc4b1456cc07ffb07da501Bjorn Helgaas dev_info(&dev->dev, "not setting up bridge for bus " 67980ccba1186d48fa728dc4b1456cc07ffb07da501Bjorn Helgaas "%04x:%02x\n", pci_domain_nr(b), b->number); 6801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 6811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 6821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 6831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 684568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu 685568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Luvoid __ref pci_bus_assign_resources(const struct pci_bus *bus) 686568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu{ 687568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu __pci_bus_assign_resources(bus, NULL); 688568ddef8735d4a51a521ba6af026ee0c32281566Yinghai Lu} 6891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL(pci_bus_assign_resources); 6901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6916841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lustatic void __ref __pci_bridge_assign_resources(const struct pci_dev *bridge, 6926841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu struct resource_list_x *fail_head) 6936841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu{ 6946841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu struct pci_bus *b; 6956841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu 6966841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu pdev_assign_resources_sorted((struct pci_dev *)bridge, fail_head); 6976841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu 6986841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu b = bridge->subordinate; 6996841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu if (!b) 7006841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu return; 7016841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu 7026841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu __pci_bus_assign_resources(b, fail_head); 7036841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu 7046841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu switch (bridge->class >> 8) { 7056841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu case PCI_CLASS_BRIDGE_PCI: 7066841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu pci_setup_bridge(b); 7076841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu break; 7086841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu 7096841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu case PCI_CLASS_BRIDGE_CARDBUS: 7106841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu pci_setup_cardbus(b); 7116841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu break; 7126841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu 7136841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu default: 7146841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu dev_info(&bridge->dev, "not setting up bridge for bus " 7156841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu "%04x:%02x\n", pci_domain_nr(b), b->number); 7166841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu break; 7176841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu } 7186841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu} 7195009b46025acb2d3955d2c93574604fba667ef39Yinghai Lustatic void pci_bridge_release_resources(struct pci_bus *bus, 7205009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu unsigned long type) 7215009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu{ 7225009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu int idx; 7235009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu bool changed = false; 7245009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu struct pci_dev *dev; 7255009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu struct resource *r; 7265009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu unsigned long type_mask = IORESOURCE_IO | IORESOURCE_MEM | 7275009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu IORESOURCE_PREFETCH; 7285009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu 7295009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu dev = bus->self; 7305009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu for (idx = PCI_BRIDGE_RESOURCES; idx <= PCI_BRIDGE_RESOURCE_END; 7315009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu idx++) { 7325009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu r = &dev->resource[idx]; 7335009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu if ((r->flags & type_mask) != type) 7345009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu continue; 7355009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu if (!r->parent) 7365009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu continue; 7375009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu /* 7385009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu * if there are children under that, we should release them 7395009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu * all 7405009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu */ 7415009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu release_child_resources(r); 7425009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu if (!release_resource(r)) { 7435009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu dev_printk(KERN_DEBUG, &dev->dev, 7445009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu "resource %d %pR released\n", idx, r); 7455009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu /* keep the old size */ 7465009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu r->end = resource_size(r) - 1; 7475009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu r->start = 0; 7485009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu r->flags = 0; 7495009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu changed = true; 7505009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu } 7515009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu } 7525009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu 7535009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu if (changed) { 7545009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu /* avoiding touch the one without PREF */ 7555009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu if (type & IORESOURCE_PREFETCH) 7565009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu type = IORESOURCE_PREFETCH; 7575009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu __pci_setup_bridge(bus, type); 7585009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu } 7595009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu} 7605009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu 7615009b46025acb2d3955d2c93574604fba667ef39Yinghai Luenum release_type { 7625009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu leaf_only, 7635009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu whole_subtree, 7645009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu}; 7655009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu/* 7665009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu * try to release pci bridge resources that is from leaf bridge, 7675009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu * so we can allocate big new one later 7685009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu */ 7695009b46025acb2d3955d2c93574604fba667ef39Yinghai Lustatic void __ref pci_bus_release_bridge_resources(struct pci_bus *bus, 7705009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu unsigned long type, 7715009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu enum release_type rel_type) 7725009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu{ 7735009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu struct pci_dev *dev; 7745009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu bool is_leaf_bridge = true; 7755009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu 7765009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu list_for_each_entry(dev, &bus->devices, bus_list) { 7775009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu struct pci_bus *b = dev->subordinate; 7785009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu if (!b) 7795009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu continue; 7805009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu 7815009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu is_leaf_bridge = false; 7825009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu 7835009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu if ((dev->class >> 8) != PCI_CLASS_BRIDGE_PCI) 7845009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu continue; 7855009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu 7865009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu if (rel_type == whole_subtree) 7875009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu pci_bus_release_bridge_resources(b, type, 7885009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu whole_subtree); 7895009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu } 7905009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu 7915009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu if (pci_is_root_bus(bus)) 7925009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu return; 7935009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu 7945009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu if ((bus->self->class >> 8) != PCI_CLASS_BRIDGE_PCI) 7955009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu return; 7965009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu 7975009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu if ((rel_type == whole_subtree) || is_leaf_bridge) 7985009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu pci_bridge_release_resources(bus, type); 7995009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu} 8005009b46025acb2d3955d2c93574604fba667ef39Yinghai Lu 80176fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lustatic void pci_bus_dump_res(struct pci_bus *bus) 80276fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lu{ 80376fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lu int i; 80476fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lu 80576fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lu for (i = 0; i < PCI_BUS_NUM_RESOURCES; i++) { 80676fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lu struct resource *res = bus->resource[i]; 8077c9342b8dd1a32386fc32bffb9eedebbfe264763Yinghai Lu 8087c9342b8dd1a32386fc32bffb9eedebbfe264763Yinghai Lu if (!res || !res->end || !res->flags) 80976fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lu continue; 81076fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lu 811c7dabef8a2c59e6a3de9d66fc35fb6a43ef7172dBjorn Helgaas dev_printk(KERN_DEBUG, &bus->dev, "resource %d %pR\n", i, res); 81276fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lu } 81376fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lu} 81476fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lu 81576fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lustatic void pci_bus_dump_resources(struct pci_bus *bus) 81676fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lu{ 81776fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lu struct pci_bus *b; 81876fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lu struct pci_dev *dev; 81976fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lu 82076fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lu 82176fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lu pci_bus_dump_res(bus); 82276fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lu 82376fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lu list_for_each_entry(dev, &bus->devices, bus_list) { 82476fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lu b = dev->subordinate; 82576fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lu if (!b) 82676fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lu continue; 82776fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lu 82876fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lu pci_bus_dump_resources(b); 82976fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lu } 83076fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lu} 83176fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lu 832977d17bb1749517b353874ccdc9b85abc7a58c2aYinghai Lustatic int __init pci_bus_get_depth(struct pci_bus *bus) 833977d17bb1749517b353874ccdc9b85abc7a58c2aYinghai Lu{ 834977d17bb1749517b353874ccdc9b85abc7a58c2aYinghai Lu int depth = 0; 835977d17bb1749517b353874ccdc9b85abc7a58c2aYinghai Lu struct pci_dev *dev; 836977d17bb1749517b353874ccdc9b85abc7a58c2aYinghai Lu 837977d17bb1749517b353874ccdc9b85abc7a58c2aYinghai Lu list_for_each_entry(dev, &bus->devices, bus_list) { 838977d17bb1749517b353874ccdc9b85abc7a58c2aYinghai Lu int ret; 839977d17bb1749517b353874ccdc9b85abc7a58c2aYinghai Lu struct pci_bus *b = dev->subordinate; 840977d17bb1749517b353874ccdc9b85abc7a58c2aYinghai Lu if (!b) 841977d17bb1749517b353874ccdc9b85abc7a58c2aYinghai Lu continue; 842977d17bb1749517b353874ccdc9b85abc7a58c2aYinghai Lu 843977d17bb1749517b353874ccdc9b85abc7a58c2aYinghai Lu ret = pci_bus_get_depth(b); 844977d17bb1749517b353874ccdc9b85abc7a58c2aYinghai Lu if (ret + 1 > depth) 845977d17bb1749517b353874ccdc9b85abc7a58c2aYinghai Lu depth = ret + 1; 846977d17bb1749517b353874ccdc9b85abc7a58c2aYinghai Lu } 847977d17bb1749517b353874ccdc9b85abc7a58c2aYinghai Lu 848977d17bb1749517b353874ccdc9b85abc7a58c2aYinghai Lu return depth; 849977d17bb1749517b353874ccdc9b85abc7a58c2aYinghai Lu} 850977d17bb1749517b353874ccdc9b85abc7a58c2aYinghai Lustatic int __init pci_get_max_depth(void) 851977d17bb1749517b353874ccdc9b85abc7a58c2aYinghai Lu{ 852977d17bb1749517b353874ccdc9b85abc7a58c2aYinghai Lu int depth = 0; 853977d17bb1749517b353874ccdc9b85abc7a58c2aYinghai Lu struct pci_bus *bus; 854977d17bb1749517b353874ccdc9b85abc7a58c2aYinghai Lu 855977d17bb1749517b353874ccdc9b85abc7a58c2aYinghai Lu list_for_each_entry(bus, &pci_root_buses, node) { 856977d17bb1749517b353874ccdc9b85abc7a58c2aYinghai Lu int ret; 857977d17bb1749517b353874ccdc9b85abc7a58c2aYinghai Lu 858977d17bb1749517b353874ccdc9b85abc7a58c2aYinghai Lu ret = pci_bus_get_depth(bus); 859977d17bb1749517b353874ccdc9b85abc7a58c2aYinghai Lu if (ret > depth) 860977d17bb1749517b353874ccdc9b85abc7a58c2aYinghai Lu depth = ret; 861977d17bb1749517b353874ccdc9b85abc7a58c2aYinghai Lu } 862977d17bb1749517b353874ccdc9b85abc7a58c2aYinghai Lu 863977d17bb1749517b353874ccdc9b85abc7a58c2aYinghai Lu return depth; 864977d17bb1749517b353874ccdc9b85abc7a58c2aYinghai Lu} 865977d17bb1749517b353874ccdc9b85abc7a58c2aYinghai Lu 866977d17bb1749517b353874ccdc9b85abc7a58c2aYinghai Lu/* 867977d17bb1749517b353874ccdc9b85abc7a58c2aYinghai Lu * first try will not touch pci bridge res 868977d17bb1749517b353874ccdc9b85abc7a58c2aYinghai Lu * second and later try will clear small leaf bridge res 869977d17bb1749517b353874ccdc9b85abc7a58c2aYinghai Lu * will stop till to the max deepth if can not find good one 870977d17bb1749517b353874ccdc9b85abc7a58c2aYinghai Lu */ 8711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid __init 8721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldspci_assign_unassigned_resources(void) 8731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 8741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct pci_bus *bus; 875977d17bb1749517b353874ccdc9b85abc7a58c2aYinghai Lu int tried_times = 0; 876977d17bb1749517b353874ccdc9b85abc7a58c2aYinghai Lu enum release_type rel_type = leaf_only; 877977d17bb1749517b353874ccdc9b85abc7a58c2aYinghai Lu struct resource_list_x head, *list; 878977d17bb1749517b353874ccdc9b85abc7a58c2aYinghai Lu unsigned long type_mask = IORESOURCE_IO | IORESOURCE_MEM | 879977d17bb1749517b353874ccdc9b85abc7a58c2aYinghai Lu IORESOURCE_PREFETCH; 880977d17bb1749517b353874ccdc9b85abc7a58c2aYinghai Lu unsigned long failed_type; 881977d17bb1749517b353874ccdc9b85abc7a58c2aYinghai Lu int max_depth = pci_get_max_depth(); 882977d17bb1749517b353874ccdc9b85abc7a58c2aYinghai Lu int pci_try_num; 883977d17bb1749517b353874ccdc9b85abc7a58c2aYinghai Lu 884977d17bb1749517b353874ccdc9b85abc7a58c2aYinghai Lu head.next = NULL; 8851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 886977d17bb1749517b353874ccdc9b85abc7a58c2aYinghai Lu pci_try_num = max_depth + 1; 887977d17bb1749517b353874ccdc9b85abc7a58c2aYinghai Lu printk(KERN_DEBUG "PCI: max bus depth: %d pci_try_num: %d\n", 888977d17bb1749517b353874ccdc9b85abc7a58c2aYinghai Lu max_depth, pci_try_num); 889977d17bb1749517b353874ccdc9b85abc7a58c2aYinghai Lu 890977d17bb1749517b353874ccdc9b85abc7a58c2aYinghai Luagain: 8911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Depth first, calculate sizes and alignments of all 8921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds subordinate buses. */ 8931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds list_for_each_entry(bus, &pci_root_buses, node) { 8941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_bus_size_bridges(bus); 8951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 8961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Depth last, allocate resources and update the hardware. */ 8971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds list_for_each_entry(bus, &pci_root_buses, node) { 898977d17bb1749517b353874ccdc9b85abc7a58c2aYinghai Lu __pci_bus_assign_resources(bus, &head); 899977d17bb1749517b353874ccdc9b85abc7a58c2aYinghai Lu } 900977d17bb1749517b353874ccdc9b85abc7a58c2aYinghai Lu tried_times++; 901977d17bb1749517b353874ccdc9b85abc7a58c2aYinghai Lu 902977d17bb1749517b353874ccdc9b85abc7a58c2aYinghai Lu /* any device complain? */ 903977d17bb1749517b353874ccdc9b85abc7a58c2aYinghai Lu if (!head.next) 904977d17bb1749517b353874ccdc9b85abc7a58c2aYinghai Lu goto enable_and_dump; 905977d17bb1749517b353874ccdc9b85abc7a58c2aYinghai Lu failed_type = 0; 906977d17bb1749517b353874ccdc9b85abc7a58c2aYinghai Lu for (list = head.next; list;) { 907977d17bb1749517b353874ccdc9b85abc7a58c2aYinghai Lu failed_type |= list->flags; 908977d17bb1749517b353874ccdc9b85abc7a58c2aYinghai Lu list = list->next; 909977d17bb1749517b353874ccdc9b85abc7a58c2aYinghai Lu } 910977d17bb1749517b353874ccdc9b85abc7a58c2aYinghai Lu /* 911977d17bb1749517b353874ccdc9b85abc7a58c2aYinghai Lu * io port are tight, don't try extra 912977d17bb1749517b353874ccdc9b85abc7a58c2aYinghai Lu * or if reach the limit, don't want to try more 913977d17bb1749517b353874ccdc9b85abc7a58c2aYinghai Lu */ 914977d17bb1749517b353874ccdc9b85abc7a58c2aYinghai Lu failed_type &= type_mask; 915977d17bb1749517b353874ccdc9b85abc7a58c2aYinghai Lu if ((failed_type == IORESOURCE_IO) || (tried_times >= pci_try_num)) { 916977d17bb1749517b353874ccdc9b85abc7a58c2aYinghai Lu free_failed_list(&head); 917977d17bb1749517b353874ccdc9b85abc7a58c2aYinghai Lu goto enable_and_dump; 918977d17bb1749517b353874ccdc9b85abc7a58c2aYinghai Lu } 919977d17bb1749517b353874ccdc9b85abc7a58c2aYinghai Lu 920977d17bb1749517b353874ccdc9b85abc7a58c2aYinghai Lu printk(KERN_DEBUG "PCI: No. %d try to assign unassigned res\n", 921977d17bb1749517b353874ccdc9b85abc7a58c2aYinghai Lu tried_times + 1); 922977d17bb1749517b353874ccdc9b85abc7a58c2aYinghai Lu 923977d17bb1749517b353874ccdc9b85abc7a58c2aYinghai Lu /* third times and later will not check if it is leaf */ 924977d17bb1749517b353874ccdc9b85abc7a58c2aYinghai Lu if ((tried_times + 1) > 2) 925977d17bb1749517b353874ccdc9b85abc7a58c2aYinghai Lu rel_type = whole_subtree; 926977d17bb1749517b353874ccdc9b85abc7a58c2aYinghai Lu 927977d17bb1749517b353874ccdc9b85abc7a58c2aYinghai Lu /* 928977d17bb1749517b353874ccdc9b85abc7a58c2aYinghai Lu * Try to release leaf bridge's resources that doesn't fit resource of 929977d17bb1749517b353874ccdc9b85abc7a58c2aYinghai Lu * child device under that bridge 930977d17bb1749517b353874ccdc9b85abc7a58c2aYinghai Lu */ 931977d17bb1749517b353874ccdc9b85abc7a58c2aYinghai Lu for (list = head.next; list;) { 932977d17bb1749517b353874ccdc9b85abc7a58c2aYinghai Lu bus = list->dev->bus; 933977d17bb1749517b353874ccdc9b85abc7a58c2aYinghai Lu pci_bus_release_bridge_resources(bus, list->flags & type_mask, 934977d17bb1749517b353874ccdc9b85abc7a58c2aYinghai Lu rel_type); 935977d17bb1749517b353874ccdc9b85abc7a58c2aYinghai Lu list = list->next; 9361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 937977d17bb1749517b353874ccdc9b85abc7a58c2aYinghai Lu /* restore size and flags */ 938977d17bb1749517b353874ccdc9b85abc7a58c2aYinghai Lu for (list = head.next; list;) { 939977d17bb1749517b353874ccdc9b85abc7a58c2aYinghai Lu struct resource *res = list->res; 940977d17bb1749517b353874ccdc9b85abc7a58c2aYinghai Lu 941977d17bb1749517b353874ccdc9b85abc7a58c2aYinghai Lu res->start = list->start; 942977d17bb1749517b353874ccdc9b85abc7a58c2aYinghai Lu res->end = list->end; 943977d17bb1749517b353874ccdc9b85abc7a58c2aYinghai Lu res->flags = list->flags; 944977d17bb1749517b353874ccdc9b85abc7a58c2aYinghai Lu if (list->dev->subordinate) 945977d17bb1749517b353874ccdc9b85abc7a58c2aYinghai Lu res->flags = 0; 946977d17bb1749517b353874ccdc9b85abc7a58c2aYinghai Lu 947977d17bb1749517b353874ccdc9b85abc7a58c2aYinghai Lu list = list->next; 948977d17bb1749517b353874ccdc9b85abc7a58c2aYinghai Lu } 949977d17bb1749517b353874ccdc9b85abc7a58c2aYinghai Lu free_failed_list(&head); 950977d17bb1749517b353874ccdc9b85abc7a58c2aYinghai Lu 951977d17bb1749517b353874ccdc9b85abc7a58c2aYinghai Lu goto again; 952977d17bb1749517b353874ccdc9b85abc7a58c2aYinghai Lu 953977d17bb1749517b353874ccdc9b85abc7a58c2aYinghai Luenable_and_dump: 954977d17bb1749517b353874ccdc9b85abc7a58c2aYinghai Lu /* Depth last, update the hardware. */ 955977d17bb1749517b353874ccdc9b85abc7a58c2aYinghai Lu list_for_each_entry(bus, &pci_root_buses, node) 956977d17bb1749517b353874ccdc9b85abc7a58c2aYinghai Lu pci_enable_bridges(bus); 95776fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lu 95876fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lu /* dump the resource on buses */ 95976fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lu list_for_each_entry(bus, &pci_root_buses, node) { 96076fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lu pci_bus_dump_resources(bus); 96176fbc263ff7e42ce8b21b8aee176e3c74b45f81aYinghai Lu } 9621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 9636841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu 9646841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Luvoid pci_assign_unassigned_bridge_resources(struct pci_dev *bridge) 9656841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu{ 9666841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu struct pci_bus *parent = bridge->subordinate; 9676841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu int retval; 9686841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu 9696841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu pci_bus_size_bridges(parent); 9706841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu __pci_bridge_assign_resources(bridge, NULL); 9716841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu retval = pci_reenable_device(bridge); 9726841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu pci_set_master(bridge); 9736841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu pci_enable_bridges(parent); 9746841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai Lu} 9756841ec681a88b66651e4563040b9c7a7ad25d7b5Yinghai LuEXPORT_SYMBOL_GPL(pci_assign_unassigned_bridge_resources); 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